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KR-20260067896-A - DEVICE FOR MEASURING VOLTAGE

KR20260067896AKR 20260067896 AKR20260067896 AKR 20260067896AKR-20260067896-A

Abstract

The present disclosure relates to a voltage measuring device. The voltage measuring device may include a bus bar electrically connected to a first terminal and a second terminal electrically connected to a battery cell and extending in a first direction, a shunt resistance located on the bus bar and extending in a second direction intersecting the first direction, a measuring unit that measures a first voltage value applied to a first sub-region including a portion of the shunt resistance, and a measuring unit that measures a second voltage value applied to a second sub-region including another portion of the shunt resistance.

Inventors

  • 유준호
  • 정현철
  • 윤석빈

Assignees

  • 삼성에스디아이 주식회사

Dates

Publication Date
20260513
Application Date
20241106

Claims (20)

  1. A busbar electrically connected to a first terminal and a second terminal electrically connected to a battery cell, and extending in a first direction; A shunt resistance located on the busbar and extended in a second direction intersecting the first direction; A measuring unit that measures a first voltage value applied to a first sub-region including a portion of the shunt resistors and measures a second voltage value applied to a second sub-region including another portion of the shunt resistors. A voltage measuring device including
  2. In paragraph 1, A first_1 sensing unit and a first_2 sensing unit located at both ends of the first sub-region and having a measuring terminal disposed therein for measuring voltage by the measuring unit; and A 2_1 sensing unit and a 2_2 sensing unit located at both ends of the second sub-region and having the measurement terminals disposed therein A voltage measuring device further comprising
  3. In paragraph 2, A voltage measuring device in which the measuring unit measures a third voltage value applied between the first_1 sensing unit and the second_2 sensing unit, and measures a fourth voltage value applied between the second_1 sensing unit and the first_2 sensing unit.
  4. In paragraph 2, The above-mentioned first_1 sensing unit and the above-mentioned second_1 sensing unit are positioned next to one side of the shunt resistor, and A voltage measuring device in which the first_2 sensing unit and the second_2 sensing unit are positioned next to the other side of the shunt resistor.
  5. In paragraph 2, The above-mentioned first_1 sensing unit is arranged symmetrically with respect to the first_2 sensing unit with respect to the center line of the shunt resistor, and A voltage measuring device in which the above 2_1 sensing part is symmetrically positioned with respect to the above 2_2 sensing part with respect to the center line of the above shunt resistor.
  6. In paragraph 2, The size of the above-mentioned 1_1 sensing part is different from the size of the above-mentioned 1_2 sensing part, and A voltage measuring device in which the size of the above 2_1 sensing part is different from the size of the above 2_2 sensing part.
  7. In paragraph 2, A first fastening part and a second fastening part for fixing the above busbar Includes more, A voltage measuring device in which the distance from the shunt resistor in the first direction to each of the first connecting part and the second connecting part is longer than the distance from the shunt resistor in the first direction to each of the first_1 sensing part and the first_2 sensing part.
  8. In Paragraph 7, A voltage measuring device in which the first connecting part is electrically connected to the first terminal and the second connecting part is electrically connected to the second terminal.
  9. In paragraph 5, A 1_1 fastening part, a 1_2 fastening part, a 2_1 fastening part, and a 2_2 fastening part for fixing the above busbar Includes more, The above-mentioned first_1 fastening part and first_2 fastening part are electrically connected to the first terminal, and The distance from the shunt resistor along the first direction to each of the first_1 connecting part and the first_2 connecting part is longer than the distance from the shunt resistor along the first direction to each of the first_1 sensing part and the first_2 sensing part, and The above 2_1 fastening part and 2_2 fastening part are electrically connected to the above 2 terminal, and A voltage measuring device in which the distance from the shunt resistor in the first direction to each of the second_1 connecting part and the second_2 connecting part is longer than the distance from the shunt resistor in the first direction to each of the second_1 sensing part and the second_2 sensing part.
  10. In Paragraph 9, The first_1 fastening part, the first_1 sensing part, the first_2 sensing part, and the first_2 fastening part are arranged on a straight line parallel to the first direction, and A voltage measuring device in which the 2_1 fastening part, the 2_1 sensing part, the 2_2 sensing part and the 2_2 fastening part are arranged on a straight line parallel to the 1 direction.
  11. In paragraph 1, The above shunt resistor is a voltage measuring device that crosses both sides of the busbar.
  12. In paragraph 1, A control unit that calculates a first current value for the first sub-region based on the first voltage value and calculates a second current value for the second sub-region based on the second voltage value. A voltage measuring device further comprising
  13. In Paragraph 12, The above control unit is a voltage measuring device that outputs a warning associated with the shunt resistor by comparing the ratio of the first voltage value and the second voltage value with a threshold value.
  14. A busbar electrically connected to a first terminal and a second terminal electrically connected to a battery cell, and extending in a first direction; A shunt resistor located on the busbar and extending in a second direction intersecting the first direction; A measuring unit that measures a first voltage value applied to a first sub-region including a portion of the shunt resistors and measures a second voltage value applied to a second sub-region including another portion of the shunt resistors; and A boundary portion located on the busbar and having a through hole that separates a part of the shunt resistor included in the first sub-region from another part of the shunt resistor included in the second sub-region. A voltage measuring device including
  15. In Paragraph 14, A first_1 sensing unit and a first_2 sensing unit located at both ends of the first sub-region and having a measuring terminal disposed therein for measuring voltage by the measuring unit; and A 2_1 sensing unit and a 2_2 sensing unit located at both ends of the second sub-region and having the measurement terminals disposed therein A voltage measuring device further comprising
  16. In paragraph 15, A voltage measuring device in which the measuring unit measures a third voltage value applied between the first_1 sensing unit and the second_2 sensing unit, and measures a fourth voltage value applied between the second_1 sensing unit and the first_2 sensing unit.
  17. In paragraph 15, The above-mentioned first_1 sensing unit and the above-mentioned second_1 sensing unit are disposed on one side of the shunt resistor, and A voltage measuring device wherein the first_2 sensing unit and the second_2 sensing unit are disposed on the other side of the shunt resistor opposite to the one side of the shunt resistor.
  18. In Paragraph 17, The size of the above-mentioned 1_1 sensing part is different from the size of the above-mentioned 1_2 sensing part, and A voltage measuring device in which the size of the above 2_1 sensing part is different from the size of the above 2_2 sensing part.
  19. In Paragraph 17, A 1_1 fastening part, a 1_2 fastening part, a 2_1 fastening part, and a 2_2 fastening part for fixing the above busbar Includes more, The above-mentioned first_1 connecting part and first_2 connecting part are electrically connected to the first terminal, and the distance from the shunt resistor along the first direction to each of the first_1 connecting part and the first_2 connecting part is longer than the distance from the shunt resistor along the first direction to each of the first_1 sensing part and the second_1 sensing part, and A voltage measuring device wherein the second_1 connecting part and the second_2 connecting part are electrically connected to the second terminal, and the distance from the shunt resistor along the first direction to each of the second_1 connecting part and the second_2 connecting part is longer than the distance from the shunt resistor along the first direction to each of the first_2 sensing part and the second_2 sensing part.
  20. In Paragraph 19, The above-mentioned first_1 fastening part, the above-mentioned first_1 sensing part, the above-mentioned first_2 sensing part and the above-mentioned second_1 fastening part are arranged in a straight line parallel to the first direction, and A voltage measuring device in which the 2_1 fastening part, the 2_1 sensing part, the 2_2 sensing part and the 2_2 fastening part are arranged in a straight line parallel to the 1 direction.

Description

Voltage measuring device The present disclosure relates to a voltage measuring device for measuring voltage values of a plurality of subregions for a shunt resistance. Unlike primary batteries, which cannot be recharged, secondary batteries are batteries capable of both charging and discharging. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptop computers, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for motor drive systems and power storage batteries in hybrid and electric vehicles. Such secondary batteries include an electrode assembly consisting of a positive electrode and a negative electrode, a case housing the assembly, and electrode terminals connected to the electrode assembly. Since repeated charging and discharging of secondary batteries, particularly rechargeable batteries such as lithium-ion batteries, can shorten battery life or degrade performance, a battery management system may be installed in electric vehicles, energy storage systems, etc., to periodically monitor the condition of the battery. Generally, a Battery Management System (BMS) can be configured to monitor battery voltage, current, temperature, etc., and to manage battery charging and discharging. A battery management system can measure the voltage of a shunt resistor placed in a section connected to a battery cell. Problems with the shunt resistor may occur due to continuous use of devices or systems connected to the battery cell, or due to the surrounding environment. However, the current reality is that not only does the battery management system fail to recognize problems with the shunt resistor, but there is also a lack of configuration capable of detecting such issues. The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a schematic diagram of a voltage measuring device according to one embodiment of the present disclosure. FIG. 2 is a plan view showing a busbar according to one embodiment of the present disclosure. FIG. 3 is a plan view showing a bus bar according to another embodiment of the present disclosure. FIG. 4 is a drawing showing an example of a battery system according to one embodiment of the present disclosure. FIG. 5 is a drawing showing an example of a busbar according to one embodiment of the present disclosure. FIG. 6 is a drawing showing an example of a busbar according to one embodiment of the present disclosure. Figure 7 is a drawing showing a plurality of busbars according to one comparative example. FIG. 8 is a drawing showing a bus bar according to one embodiment of the present disclosure. FIG. 9 is a plan view showing a plurality of busbars according to one embodiment of the present disclosure. FIGS. 10 and FIGS. 11 are drawings illustrating examples of a battery pack according to one embodiment of the present invention. FIGS. 12 and FIGS. 13 are drawings showing examples of a vehicle body and a vehicle body part equipped with a battery pack according to an embodiment of the present invention. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe their invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention. It should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Additionally, as used herein, “comprise, include” and/or “comprising, including” specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and/or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, actions, parts, elements, and/or groups. Additionally, to aid in understanding the invention, the attach