KR-20260067973-A - BATTERY SYSTEM ANMD BATTERY POWER CONTROL METHOD BASED ON BATTERY TEMPERATURE SENSOR LAYOUT

Abstract

The present invention relates to a battery system and a battery power control method based on a battery temperature sensor layout. The battery comprises a plurality of cells and a cooling block disposed above the cells. The battery system may include at least one first temperature sensor disposed adjacent to an explosion-proof valve of at least one cell and configured to detect the temperature of the cell; at least one second temperature sensor disposed below the cell and configured to detect the temperature of the cell; at least one third temperature sensor disposed above the cell and configured to detect the temperature of the cell; and a controller configured to receive the temperatures detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor, and to determine whether a thermal runaway failure, an overtemperature failure, or a low temperature failure of the battery occurs based on the temperatures detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor.

Inventors

• 리쟁휘
• 시웬나
• 궈링
• 푸홍리

Assignees

• 현대자동차주식회사
• 기아 주식회사

Dates

Publication Date

20260513

Application Date

20250825

Priority Date

20241106

Claims (20)

1. In a battery system based on a battery temperature sensor layout, The battery comprises a plurality of cells and a cooling block disposed above the cells, and the battery system, At least one first temperature sensor positioned adjacent to an explosion-proof valve of at least one cell and configured to detect the temperature of the cell; At least one second temperature sensor disposed at the bottom of at least one cell and configured to detect the temperature of the said cell; At least one third temperature sensor positioned above at least one cell and configured to detect the temperature of the cell; and A controller configured to receive temperatures detected by a first temperature sensor, a second temperature sensor, and a third temperature sensor, and to determine whether a thermal runaway failure, an overtemperature failure, or a low temperature failure of the battery occurs based on the temperatures detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor; A battery system including
2. In paragraph 1, The above controller Based on the temperatures detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor, the maximum temperature and the minimum temperature are determined; A battery system configured to determine whether a thermal runaway failure, overheat failure, or low temperature failure of the battery occurs using determined maximum and minimum temperatures.
3. In paragraph 2, The above controller If a thermal runaway failure, over-temperature failure, or low-temperature failure occurs in the battery, or if it is determined that the battery's charging voltage has reached the charging cutoff voltage or the battery's discharging voltage has reached the discharging cutoff voltage, the battery's charging power or discharging power is set to 0; A battery system configured to determine the maximum charging power or maximum discharging power of a battery and to make the battery power less than or equal to the maximum charging power or maximum discharging power when it is determined that no thermal runaway failure occurs, no over-temperature failure occurs, no under-temperature failure occurs, the charging voltage of the battery does not reach the charging cutoff voltage, and the discharging voltage of the battery does not reach the discharging cutoff voltage.
4. In paragraph 2, The above controller Determining whether the maximum temperature exceeded the first predetermined temperature and persisted for the first predetermined time, and A battery system further configured to determine that a thermal runaway failure has occurred if the maximum temperature exceeds a first predetermined time and persists for a first predetermined time.
5. In paragraph 4, The above controller If the maximum temperature has not exceeded the first predetermined temperature, or if the state in which the maximum temperature exceeds the first predetermined temperature has not persisted for the first predetermined time, Determining whether the maximum temperature has exceeded a second predetermined temperature and persisted for a second predetermined time, and whether more than one-third of the total quantity of the first temperature sensor, the second temperature sensor, and the third temperature sensor has been disconnected and persisted for a second predetermined time, and It is further configured to determine that a thermal runaway failure has occurred if the maximum temperature exceeds a second predetermined time and persists for a second predetermined time, and if more than one-third of the total quantity of the first temperature sensor, the second temperature sensor, and the third temperature sensor is disconnected and persists for a second predetermined time. A battery system in which the second predetermined temperature is smaller than the first predetermined temperature.
6. In paragraph 5, The above controller If the maximum temperature has not exceeded the second predetermined temperature, or the state in which the maximum temperature exceeds the second predetermined temperature has not persisted for the second predetermined time, or at least one-third of the total quantity of the first temperature sensor, the second temperature sensor, and the third temperature sensor has not been disconnected, or the state in which at least one-third of the total quantity of the first temperature sensor, the second temperature sensor, and the third temperature sensor has been disconnected has not persisted for the second predetermined time, Determining whether the maximum temperature has exceeded a second predetermined temperature, and whether the temperature has continuously risen within a third predetermined time to generate a predetermined temperature difference, A battery system further configured to determine that a thermal runaway failure has occurred when the maximum temperature exceeds a second predetermined temperature and continues to rise within a third predetermined time, resulting in a predetermined temperature difference.
7. In paragraph 6, The above controller If the maximum temperature did not exceed the second predetermined temperature, or the temperature did not continuously rise within the third predetermined time, or a predetermined temperature difference did not occur, Determine whether the maximum temperature is lower than the third predetermined temperature, and It is further configured to determine that a thermal runaway failure has not occurred when the maximum temperature is lower than a third predetermined temperature, and A battery system where the third predetermined temperature is smaller than the second predetermined temperature.
8. In Paragraph 7, The above controller If the maximum temperature exceeds the third predetermined temperature, determine whether the maximum temperature exceeds the second predetermined temperature, and If the maximum temperature exceeds the second predetermined temperature, after the fourth predetermined time, determine again whether the maximum temperature has continuously risen within the third predetermined time and whether a predetermined temperature difference has occurred, and A battery system further configured to determine that no thermal runaway failure has occurred if the maximum temperature does not exceed a second predetermined temperature.
9. In Paragraph 7, The above controller Determining whether the lowest temperature is lower than the fourth predetermined temperature, and A battery system further configured to determine that a low-temperature failure has occurred when the lowest temperature is lower than a fourth predetermined temperature.
10. In Paragraph 9, The above controller If the lowest temperature is not lower than the fourth predetermined temperature, determine whether the highest temperature has exceeded the fifth predetermined temperature, and It is further configured to determine that an overheating failure has occurred if the maximum temperature exceeds the fifth predetermined temperature, and A battery system where the fifth predetermined temperature is greater than the fourth predetermined temperature.
11. In Paragraph 10, The above controller If the maximum temperature does not exceed the fifth predetermined temperature, determine whether the maximum temperature has exceeded the sixth predetermined temperature, and If the maximum temperature exceeds the 6th predetermined temperature, the charging power of the battery is set to 0, or the maximum discharge power of the battery is determined and the battery power is further configured to be less than or equal to the maximum discharge power, and A battery system where the 6th predetermined temperature is smaller than the 5th predetermined temperature.
12. In paragraph 3, The above controller When charging a battery, the charging power at the highest temperature and the charging power at the lowest temperature of the battery are determined based on the determined highest temperature and lowest temperature and the total battery capacity, and the smaller of the charging power at the highest temperature and the charging power at the lowest temperature of the battery is determined as the maximum charging power of the battery; A battery system further configured to determine the discharge power at the highest temperature and the discharge power at the lowest temperature of the battery based on the determined highest temperature and lowest temperature and the total battery capacity when the battery is discharged, and to determine the smaller of the discharge power at the highest temperature and the discharge power at the lowest temperature of the battery as the maximum discharge power of the battery.
13. In a method for controlling battery power, The above battery comprises a plurality of cells and a cooling block disposed above the cells, and The above method is, A step of detecting the temperature of a cell using at least one first temperature sensor, at least one second temperature sensor and at least one third temperature sensor; and A step of determining whether a thermal runaway failure, an overtemperature failure, or a low temperature failure of the battery has occurred using the temperatures detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor; Includes, At least one first temperature sensor is positioned adjacent to the explosion-proof valve of at least one cell, and At least one second temperature sensor is positioned at the bottom of at least one cell, and A method for controlling the power of a battery in which at least one third temperature sensor is placed on top of at least one cell.
14. In Paragraph 13, A step of determining a maximum temperature and a minimum temperature based on the temperatures detected by a first temperature sensor, a second temperature sensor and a third temperature sensor; and A step of determining whether a thermal runaway failure, overtemperature failure, or low temperature failure of the battery occurs using the determined maximum and minimum temperatures; A battery power control method including further
15. In Paragraph 14, A step of setting the charging power or discharging power of the battery to zero when it is determined that a thermal runaway failure, over-temperature failure, or low-temperature failure occurs in the battery, or when the charging voltage of the battery reaches the charging cutoff voltage or the discharging voltage of the battery reaches the discharging cutoff voltage; If it is determined that no thermal runaway failure occurs, no overtemperature failure occurs, no low temperature failure occurs, the battery charging voltage does not reach the charging cutoff voltage, and the battery discharging voltage does not reach the discharging cutoff voltage, the step of determining the maximum charging power or maximum discharging power of the battery and making the battery power less than or equal to the maximum charging power or maximum discharging power; A battery power control method including further
16. In Paragraph 13, A step of determining whether the maximum temperature has exceeded a first predetermined temperature and has persisted for a first predetermined time; and A step of determining that a thermal runaway failure has occurred if the maximum temperature exceeds a first predetermined time and persists for a first predetermined time; A battery power control method including further
17. In Paragraph 16, If the maximum temperature has not exceeded the first predetermined temperature, or if the state in which the maximum temperature exceeds the first predetermined temperature has not persisted for the first predetermined time, A step of determining whether the maximum temperature has exceeded a second predetermined temperature and has persisted for a second predetermined time, and whether more than one-third of the total quantity of the first temperature sensor, the second temperature sensor, and the third temperature sensor has been disconnected and has persisted for a second predetermined time; and A step of determining that a thermal runaway failure has occurred if the maximum temperature exceeds a second predetermined temperature and persists for a second predetermined time, and more than one-third of the total quantity of the first temperature sensor, the second temperature sensor, and the third temperature sensor are disconnected and persist for a second predetermined time; Includes more, A power control method for a battery where the second predetermined temperature is smaller than the first predetermined temperature.
18. In Paragraph 17, If the maximum temperature has not exceeded the second predetermined temperature, or the state in which the maximum temperature exceeds the second predetermined temperature has not persisted for the second predetermined time, or at least one-third of the total quantity of the first temperature sensor, the second temperature sensor, and the third temperature sensor has not been disconnected, or the state in which at least one-third of the total quantity of the first temperature sensor, the second temperature sensor, and the third temperature sensor has been disconnected has not persisted for the second predetermined time, A step of determining whether the maximum temperature has exceeded a second predetermined temperature, and whether the temperature has continuously risen within a third predetermined time to generate a predetermined temperature difference; and A step of determining that a thermal runaway failure has occurred when the maximum temperature exceeds a second predetermined temperature and continuously rises within a third predetermined time, resulting in a predetermined temperature difference; A battery power control method including further
19. In Paragraph 18, If the maximum temperature did not exceed the second predetermined temperature, or the temperature did not continuously rise within the third predetermined time, or a predetermined temperature difference did not occur, A step of determining whether the maximum temperature is lower than a third predetermined temperature; and A step of determining that thermal runaway failure has not occurred if the maximum temperature is lower than a third predetermined temperature; Includes more, A method for controlling the power of a battery where the third predetermined temperature is smaller than the second predetermined temperature.
20. In Paragraph 19, A step of determining whether the maximum temperature has exceeded the second predetermined temperature when the maximum temperature has exceeded the third predetermined temperature; If the maximum temperature exceeds the second predetermined temperature, after the fourth predetermined time, a step of re-determining whether the maximum temperature has continuously risen within the third predetermined time and whether a predetermined temperature difference has occurred; and A step of determining that a thermal runaway failure has not occurred if the maximum temperature does not exceed a second predetermined temperature; A battery power control method including further

Description

Battery System and Battery Power Control Method Based on Battery Temperature Sensor Layout The present invention relates to a battery system based on a battery temperature sensor layout and a method for controlling battery power. A vehicle's battery system consists of multiple cells, and temperature control of the entire battery system is a critical factor affecting battery performance and lifespan. Currently, some technologies only consider placing temperature sensors inside the cells; however, placing temperature sensors inside every cell in a vehicle's battery system is impractical and could increase costs. Furthermore, placing temperature sensors in only some cells may affect the consistency of cell inspections. The matters described in this background technology section are written to enhance understanding of the background of the invention and may include matters that are not prior art already known to those skilled in the art to which this technology belongs. Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the drawings. For clarity, the same components in different drawings are indicated by the same reference numerals. It should be noted that the drawings are illustrative only and are not necessarily drawn in proportion. FIG. 1 is a schematic diagram of a battery system based on a battery temperature sensor layout according to an embodiment of the present invention. FIG. 2 is a discharge power table of a battery system based on a battery temperature sensor layout according to an embodiment of the present invention. FIG. 3 is a flowchart of a battery power control method according to an embodiment of the present invention. Hereinafter, embodiments of the present invention are described in detail. These embodiments are implemented based on the technical methods of the present invention, and detailed implementation methods and specific operation processes are presented; however, the scope of protection of the present invention is not limited to the following embodiments. FIG. 1 is a schematic diagram of a battery system based on a battery temperature sensor layout according to an embodiment of the present invention, and FIG. 2 is a discharge power table of a battery system based on a battery temperature sensor layout according to an embodiment of the present invention. FIG. 3 is a flowchart of a battery power control method according to an embodiment of the present invention. As illustrated in FIG. 1, a battery system based on a battery temperature sensor layout according to an exemplary embodiment of the present invention may have 124 cells (4). The cells (4) may have a blade-shaped structure and may be divided into two evenly spaced rows, with 62 cells (4) in each row. In a battery system based on a battery temperature sensor layout according to an embodiment of the present invention, a cooling block (5) for cooling the battery may be located above all cells (4). A battery system based on a battery temperature sensor layout according to an exemplary embodiment of the present invention may further include at least one first temperature sensor (1), at least one second temperature sensor (2), and at least one third sensor (3). A battery system based on a battery temperature sensor layout according to an embodiment of the present invention may have 10 first temperature sensors (1), 4 second temperature sensors (2), and 4 third temperature sensors (3). The first temperature sensor (1) is positioned adjacent to the explosion-proof valve of the cell (4) and is used to detect the temperature of the cell (4), so that an abnormal temperature of the cell (4) can be identified immediately. In a battery system based on a battery temperature sensor layout according to an embodiment of the present invention, two rows of cells (4) may each be equipped with five first temperature sensors (1), three of which may be positioned on the left side of the cell (4) and, for example, may be uniformly positioned in the direction of placement of the cell (4). Additionally, two first temperature sensors (1) may be positioned on the right side of the cell (4) and, for example, may be uniformly positioned in the direction of placement of the cell (4). The second temperature sensor (2) is positioned at the bottom of the cell (4) and can be used to detect the temperature of the cell (4), so that the lowest temperature of the cell (4) can be immediately identified during the low-temperature heating operation of the battery. Additionally, the second temperature sensor (2) can immediately determine the highest temperature of the cell (4) during the high-temperature cooling operation of the battery. In a battery system based on a battery temperature sensor layout according to an embodiment of the present invention, two rows of cells (4) may each be equipped with two second temperature sensors (2). The two second temperature sensors (2) may be positioned at the lower right sid