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KR-102963074-B1 - Battery pack, Battery management apparatus, and Vehicle having the battery pack and battery management apparatus

KR102963074B1KR 102963074 B1KR102963074 B1KR 102963074B1KR-102963074-B1

Abstract

The present invention relates to a battery pack, a battery management device, and a vehicle. The vehicle of the present invention comprises: a motor that generates driving force; a seat; a battery that is provided adjacent to the seat and consists of a plurality of battery cells and supplies power to the motor; a first temperature detection unit that detects the temperature of at least one of the plurality of battery cells; a second temperature detection unit that detects the temperature of air to be discharged through the discharge port of the battery pack case; a third temperature detection unit that detects the temperature of air sucked in through the intake port of the battery pack case; a fan that induces the flow of air sucked in through the intake port to be discharged through the discharge port; and a battery management device that determines whether the battery is in a thermal runaway state based on at least one of cell temperature information regarding the temperature of at least one battery cell detected by the first temperature detection unit, discharge temperature information regarding the discharge air temperature detected by the second temperature detection unit, and intake temperature information regarding the intake air temperature detected by the third temperature detection unit, and controls the fan to rotate at a maximum rotational speed if the battery is determined to be in a thermal runaway state.

Inventors

  • 김진원
  • 최준석

Assignees

  • 현대자동차주식회사
  • 기아 주식회사

Dates

Publication Date
20260513
Application Date
20200624

Claims (20)

  1. A case having a discharge port and a suction port; A battery composed of multiple battery cells and housed inside the case; A first temperature detection unit provided in at least one of the plurality of battery cells and detecting the temperature of at least one battery cell; A second temperature detection unit provided on the discharge port side of the above case and detecting the temperature of the air to be discharged through the discharge port; and It includes a fan that is provided around the discharge port of the above case and induces the flow of air sucked in through the intake port to be discharged through the discharge port, and rotates based on at least one of cell temperature information regarding the temperature of at least one battery cell detected by the first temperature detection unit and discharge temperature information regarding the discharge air temperature detected by the second temperature detection unit. It includes a third temperature detection unit located around the intake port and detecting the temperature of the air inhaled through the intake port, and The control unit determines that the battery cell temperature is above the intake air temperature, and if it determines that the discharge air temperature is above the battery cell temperature, it determines that the battery is in a thermal runaway state. A battery pack that determines the battery condition to be normal if it is determined that the temperature of the battery cell is above the intake air temperature, and then determines that the discharge air temperature is below the temperature of the battery cell.
  2. In Article 1, The above control unit controls the fan so that the fan rotates at a maximum rotational speed when at least one battery cell is in a thermal runaway state.
  3. In Article 1, A battery pack in which the above-described control unit determines that the battery state is in a thermal runaway state when it determines that the temperature of the battery cell is below the intake air temperature and then determines that the discharge air temperature is above the intake air temperature, and determines that the battery state is in a normal state when it determines that the temperature of the battery cell is below the intake air temperature and then determines that the discharge air temperature is below the intake air temperature.
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  5. In Article 1, It further includes a switch unit for supplying power to the battery or for cutting off the supply of power to the battery, The above control unit controls the off operation of the above switch unit when it is determined that the temperature of the battery cell is abnormal.
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  8. A first temperature detection unit that detects the temperature of at least one of a plurality of battery cells; A second temperature detection unit for detecting the temperature of air to be discharged through the discharge port of the battery pack case; A third temperature detection unit that detects the temperature of air sucked in through the intake port of the battery pack case; A fan that induces the flow of air sucked in through the intake port to be discharged through the discharge port; The control unit determines whether the battery is in a thermal runaway state based on at least one of cell temperature information regarding the temperature of at least one battery cell detected by the first temperature detection unit, discharge temperature information regarding the discharge air temperature detected by the second temperature detection unit, and intake temperature information regarding the intake air temperature detected by the third temperature detection unit, and if it is determined that the battery is in a thermal runaway state, controls the fan to rotate at a maximum rotational speed. The above control unit determines that the temperature of the battery cell is above the intake air temperature, and then determines that the discharge air temperature is above the battery cell temperature, and determines that the battery is in a thermal runaway state. A battery management device that determines the battery condition is normal if it is determined that the temperature of the battery cell is above the intake air temperature, and then determines that the discharge air temperature is below the temperature of the battery cell.
  9. In Article 8, It further includes a switch unit for supplying power to the battery or for cutting off the supply of power to the battery, The above control unit is a battery management device that controls the off operation of the above switch unit when it is determined that the battery is in a thermal runaway state.
  10. In claim 8, the control unit is, A battery management device that controls the rotational speed of the fan based on the cell temperature information when the battery is determined to be in a normal state.
  11. In Article 8, The plurality of battery cells above include at least one first battery cell provided with the first temperature detection unit and a second battery cell excluding the first battery cell. The above control unit is a battery management device that determines whether the second battery cell is in a thermal runaway state based on cell temperature information of the at least one first battery cell.
  12. In claim 11, the control unit is, After determining that the temperature of the first battery cell is above the intake air temperature, if it is determined that the discharge air temperature is above the temperature of the first battery cell, the state of the second battery cell is determined to be in a thermal runaway state, and A battery management device that determines that the state of the second battery cell is normal when it is determined that the temperature of the first battery cell is above the intake air temperature, and then the discharge air temperature is below the temperature of the battery cell.
  13. In claim 12, the control unit is, A battery management device that determines that the state of the first battery cell is in a thermal runaway state when the temperature of the first battery cell is determined to be below the intake air temperature and the discharge air temperature is determined to be above the intake air temperature, and determines that the state of the second battery cell is in a normal state when the temperature of the first battery cell is determined to be below the intake air temperature and the discharge air temperature is determined to be below the intake air temperature.
  14. In claim 8, the control unit is, A battery management device that transmits notification information to an output unit so that notification information regarding thermal runaway is output when it is determined that the battery is in a thermal runaway state.
  15. Motor that generates driving force; A battery composed of multiple battery cells that supplies power to the motor; A first temperature detection unit for detecting the temperature of at least one of the plurality of battery cells; A second temperature detection unit for detecting the temperature of air to be discharged through the discharge port of the battery pack case; A third temperature detection unit that detects the temperature of air sucked in through the intake port of the battery pack case; A fan that induces the flow of air sucked in through the intake port to be discharged through the discharge port; A battery management device comprising: determining whether the battery is in a thermal runaway state based on at least one of cell temperature information regarding the temperature of at least one battery cell detected by the first temperature detection unit, discharge temperature information regarding the discharge air temperature detected by the second temperature detection unit, and intake temperature information regarding the intake air temperature detected by the third temperature detection unit; and controlling the fan to rotate at a maximum rotational speed if it is determined that the battery is in a thermal runaway state. A vehicle that determines that the state of the first battery cell is in a thermal runaway state when the temperature of the first battery cell is determined to be below the intake air temperature and the discharge air temperature is determined to be above the intake air temperature, and determines that the state of the second battery cell is in a normal state when the temperature of the first battery cell is determined to be below the intake air temperature and the discharge air temperature is determined to be below the intake air temperature.
  16. In Article 15, It further includes a switch unit for supplying power to the battery or cutting off the supply of power to the battery, The above battery management device controls the off operation of the switch unit when it is determined that the battery is in a thermal runaway state.
  17. In claim 15, the battery management device is, A vehicle that controls the rotational speed of the fan based on the cell temperature information when the battery is determined to be in a normal state.
  18. In Article 15, The plurality of battery cells above include at least one first battery cell having the first temperature detection unit and a second battery cell excluding the first battery cell. The battery management device determines that the temperature of the first battery cell is above the intake air temperature, and then determines that the discharge air temperature is above the temperature of the first battery cell, and determines that the state of the second battery cell is in a thermal runaway state. A vehicle that determines that the state of the second battery cell is normal when the temperature of the first battery cell is determined to be above the intake air temperature, and then the discharge air temperature is determined to be below the temperature of the battery cell.
  19. In claim 18, the battery management device is, A vehicle that determines that the state of the first battery cell is in a thermal runaway state when the temperature of the first battery cell is determined to be below the intake air temperature and the discharge air temperature is determined to be above the intake air temperature, and determines that the state of the second battery cell is in a normal state when the temperature of the first battery cell is determined to be below the intake air temperature and the discharge air temperature is determined to be below the intake air temperature.
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Description

Battery pack, battery management apparatus, and vehicle having the same The present invention relates to a battery pack for diagnosing overheating of a battery, a battery management device, a vehicle having the same, and a method for controlling the same. A vehicle is a machine that moves on a road by driving its wheels. These vehicles include internal combustion engine vehicles (conventional engine vehicles) that control starting using a battery and, once starting is complete, burn petroleum fuels such as gasoline or diesel to generate mechanical power and drive using this mechanical power, as well as eco-friendly vehicles that drive using electricity from a battery to improve fuel efficiency and reduce harmful gas emissions. Here, eco-friendly vehicles include electric vehicles that include a rechargeable power unit, such as a battery and a motor, and rotate the motor using electricity stored in the battery to drive the wheels using the rotation of the motor; hybrid vehicles that include an engine, a battery, and a motor, and drive by controlling the mechanical power of the engine and the electrical power of the motor; and hydrogen fuel cell vehicles. These batteries are rechargeable and dischargeable secondary batteries that are installed in eco-friendly vehicles in the form of battery packs, and can be formed by connecting battery modules consisting of multiple cells in series to obtain the necessary power. These battery cells receive or output relatively high currents during charging or discharging. This resulted in a problem where a large amount of heat was generated in each battery cell. In the case of lithium-ion batteries, gas is generated when the battery overheats. This has led to problems such as fires. FIG. 1 is an example of a vehicle equipped with a battery pack according to an embodiment. FIG. 2 is an example diagram of a battery pack according to an embodiment. FIG. 3 is a control configuration diagram of a battery management device according to an embodiment. FIG. 4 is a battery management device according to an embodiment. FIG. 5 is a control flowchart of a battery management device according to an embodiment. Throughout the specification, the same reference numerals refer to the same components. This specification does not describe all elements of the embodiments, and general content in the art to which the invention pertains or content that overlaps between embodiments is omitted. The terms 'part, module, device' used in the specification may be implemented in software or hardware, and depending on the embodiments, a plurality of 'parts, modules, devices' may be implemented as a single component, or a single 'part, module, device' may include a plurality of components. Throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are directly connected but also cases where they are indirectly connected, and indirect connections include connections made via a wireless communication network. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. The terms first, second, etc. are used to distinguish one component from another, and the components are not limited by the aforementioned terms. Singular expressions include plural expressions unless there is an obvious exception in the context. In each step, identification codes are used for convenience of explanation and do not describe the order of the steps; the steps may be performed differently from the specified order unless a specific order is clearly indicated in the context. The operating principle and embodiments of the present invention will be described below with reference to the attached drawings. FIG. 1 is an example of a vehicle equipped with a battery pack according to an embodiment. The vehicle according to the embodiment is an eco-friendly vehicle and may be a hybrid vehicle or an electric vehicle. In this embodiment, an electric vehicle is described as an example. The vehicle (1) may include a body having an interior and an exterior, and a chassis on which mechanical devices necessary for driving are installed in the remaining parts excluding the body. Here, the chassis of the vehicle is a frame that supports the body, and the chassis may be provided with wheels arranged in the front, rear, left, and right directions, a power device for applying driving force to the front, rear, left, and right wheels, a steering device, a braking device for applying braking force to the front, rear, left, and right wheels, and a suspension device. As illustrated in FIG. 1, the power unit of the vehicle (1) includes a battery pack (100), a motor (200), a motor drive unit (300), a reduction gear (400), and a slow charging unit (500). The battery pack (100) may include a battery that generates high-voltage current to supply dr