Search

KR-102962570-B1 - Battery balancing system and method of operation thereof

KR102962570B1KR 102962570 B1KR102962570 B1KR 102962570B1KR-102962570-B1

Abstract

The present disclosure comprises a battery pack block including a first battery module and a second battery module arranged in a first row and a third battery module and a fourth battery module arranged in a second row; a battery control block including first control circuits respectively connected to the first battery module and the second battery module of the first row and second control circuits respectively connected to the third battery module and the fourth battery module of the second row; a battery status determination block configured to receive output signals from the first control circuits and the second control circuits and determine the status of the first to fourth battery modules; and a control unit configured to apply a first row selection signal to the first control circuits and apply a second row selection signal to the second control circuits, wherein when the first row selection signal is activated, the battery status determination block determines the status of the first and second battery modules of the first row and outputs a determination result, and the control unit is configured to perform balancing on the first and second battery modules of the first row or activate the second row selection signal based on the determination result. It provides a balancing system.

Inventors

  • 양일석
  • 전치훈

Assignees

  • 한국전자통신연구원

Dates

Publication Date
20260508
Application Date
20220826

Claims (19)

  1. A battery pack block comprising a first battery module and a second battery module arranged in a first row, and a third battery module and a fourth battery module arranged in a second row; A battery control block comprising first control circuits respectively connected to the first battery module and the second battery module of the first row, and second control circuits respectively connected to the third battery module and the fourth battery module of the second row; A battery state determination block configured to receive output signals from the first control circuits and the second control circuits and determine the state of the first to fourth battery modules; A control unit configured to apply a first row selection signal to the first control circuits and apply a second row selection signal to the second control circuits; and It includes a balancing block comprising balancing modules respectively connected to the first control circuits and the second control circuits, and When the first row selection signal is activated, the battery status determination block determines the status of the first and second battery modules of the first row and outputs a determination result. The control unit is configured to perform balancing on the first and second battery modules of the first row or to activate the second row selection signal based on the above judgment result, Each of the first control circuits and the second control circuits is configured to connect the battery module and the balancing module connected thereto based on an output selection signal, or to output the output of the battery module as the output signal. A battery balancing system configured such that the control unit controls the output selection signal based on the judgment result.
  2. delete
  3. In Article 1, Each of the above first control circuits is: A multiplexer configured to output the output of a battery module connected to the first control circuit as a first output or a second output based on the output selection signal; and A switch comprising a first gate terminal to which the first row selection signal is applied, a first source/drain connected to the second output, and a second source/drain that outputs the output signal, The first output is a battery balancing system connected to the balancing module connected to the first control circuit.
  4. In Paragraph 3, The above control unit is: If the above judgment result is abnormal, the output selection signal is controlled to output the output of the abnormal battery module as the first output to perform balancing for the abnormal battery module, and A battery balancing system configured to disable the first row selection signal and enable the second row selection signal when the above judgment result is normal.
  5. In Article 1, The first battery module and the third battery module are arranged in a first column, and the second battery module and the fourth battery module are arranged in a second column. A first control circuit connected to a first battery module and a second control circuit connected to a third battery module transmit the output signal through a first output line corresponding to the first column, and The first control circuit connected to the second battery module and the second control circuit connected to the fourth battery module transmit the output signal through a second output line corresponding to the second column, and The battery status determination block above is a battery balancing system comprising a first determination block connected to the first output line and a second determination block connected to the second output line.
  6. In Article 5, The first judgment block is configured to determine the state of the first battery module in the first column by comparing the output signal received through the first output line with reference state information and output a judgment result. A battery balancing system configured such that the second judgment block compares an output signal received through the second output line with reference state information to determine the state of the second battery module in the second column and outputs a judgment result.
  7. In Article 6, When at least one of the first judgment block and the second judgment block outputs a judgment result determined to be abnormal, the control unit is configured to perform balancing on the battery module determined to be abnormal among the first battery module and the second battery module. A battery balancing system configured to activate the second row selection signal when both the first judgment block and the second judgment block output a judgment result in which they are judged to be normal.
  8. In Article 6, The above first judgment block is: A multiplexer configured to select and output reference state information; A comparator configured to generate a comparison result by comparing an output signal received through the first output line with the selected reference state information; and A battery balancing system comprising a judgment unit configured to determine the state of the first battery module based on the above comparison result and output a judgment result.
  9. In Article 8, The above reference state information includes reference voltage, reference current, and reference temperature, and A battery balancing system configured such that the multiplexer selects and outputs any one of the reference voltage, the reference current, and the reference temperature based on a reference state selection signal.
  10. In Article 5, It further includes a balancing block comprising balancing blocks respectively connected to the first control circuits and the second control circuits, and Each of the first control circuits and the second control circuits is configured to connect the battery module and the balancing module connected thereto based on an output selection signal, or to output the output of the battery module as the output signal. A battery balancing system configured such that the control unit generates the output selection signal based on the judgment result.
  11. A method of operating a battery balancing system comprising a first battery module and a second battery module arranged in a first row and respectively connected to first control circuits, and a third battery module and a fourth battery module arranged in a second row and respectively connected to second control circuits, wherein A step of activating a first row selection signal applied to the first control circuits; A step of receiving output signals of the first and second battery modules from the first control circuits; A step of determining whether the first and second battery modules are normal by comparing the output signal and reference state information, and outputting the determination result; Based on the above judgment result, the method includes the step of performing balancing on the first and second battery modules or activating a second row selection signal applied to the second control circuits, A method of operation in which the first control circuits and the second control circuits each connect a battery module and a balancing module connected thereto based on an output selection signal, or output the output of the battery module as the output signal.
  12. delete
  13. In Article 11, Each of the above first control circuits is: A multiplexer configured to output the output of a battery module connected to the first control circuit as a first output or a second output based on the output selection signal; and A switch comprising a first gate terminal to which the first row selection signal is applied, a first source/drain connected to the second output, and a second source/drain that outputs the output signal, The above first output is an operation method connected to the balancing module connected to the above first control circuit.
  14. In Article 13, If the above judgment result is abnormal, the output selection signal is controlled to output the output of the abnormal battery module as the first output to perform balancing for the abnormal battery module, and A method of operation in which, if the above judgment result is normal, the first row selection signal is deactivated and the second row selection signal is activated.
  15. In Article 11, The step of receiving the above output signal is: The first battery module and the third battery module are arranged in a first column, and the second battery module and the fourth battery module are arranged in a second column. A first control circuit connected to a first battery module and a second control circuit connected to a third battery module receive the output signal through a first output line corresponding to the first column, and A method of operation in which a first control circuit connected to a second battery module and a second control circuit connected to a fourth battery module receive the output signal through a second output line corresponding to the second column.
  16. In Article 15, The step of outputting the above judgment result is: The output signal received through the first output line is compared with the reference state information to determine the state of the first battery module in the first column, and the determination result is output. A method of operation for determining the state of the second battery module in the second column by comparing the output signal received through the second output line with the reference state information and outputting the determination result.
  17. In Article 16, If either the first battery module or the second battery module is determined to be abnormal, balancing is performed on the battery module determined to be abnormal among the first battery module and the second battery module, and A method of operation for activating the second row selection signal when both the first battery module and the second battery module are determined to be normal.
  18. In Article 16, The step of outputting the above judgment result includes the step of outputting the judgment result from a first judgment block connected to the first output line, and The above first judgment block is: A multiplexer configured to select and output the above reference state information; A comparator configured to generate a comparison result by comparing an output signal received through the first output line with the selected reference state information; and A method of operation comprising a judgment device configured to determine the state of the first battery module based on the above comparison result and output a judgment result.
  19. In Article 18, The above reference state information includes reference voltage, reference current, and reference temperature, and A method of operation in which the above multiplexer selects and outputs one of the reference voltage, the reference current, and the reference temperature based on a reference state selection signal.

Description

Battery balancing system and method of operation thereof The present disclosure relates to a battery balancing system and a method of operating the same, specifically to a system and method for performing state measurement and balancing in parallel with respect to battery modules. In a battery pack composed of a series and parallel combination of battery modules in which multiple cells are connected in series, the balancing function, which monitors the voltage, current, and temperature between each battery module or cell and compensates for voltage, current, and temperature deviations between modules or cells, is very important in the battery pack system. Currently, the balancing methods mainly used in battery packs are broadly classified into passive and active balancing methods. FIG. 1 is a block diagram showing an embodiment of a battery balancing system according to the present disclosure. FIG. 2 is an exemplary drawing for explaining the battery balancing system of FIG. 1. Figure 3 is a flowchart showing the operation method of the battery balancing system of Figure 1. Figure 4 is a timing diagram to explain the operation of the balancing system of Figure 1. In the following, embodiments of the present disclosure will be described clearly and in detail so that a person skilled in the art can easily practice the present disclosure. FIG. 1 is a block diagram showing an embodiment of a battery balancing system according to the present disclosure. Referring to FIG. 1, one embodiment of a battery balancing system (BBS) according to the present disclosure may include a control unit (110), a balancing control block (120), a balancing block (130), a battery pack block (140), and a battery status determination block (150). The battery balancing system (BBS) may be configured to determine the status of the battery pack block (140) and to perform balancing on the battery pack block (140) based on the determination result (DI). The battery pack block (140) may include battery modules arranged in a matrix form. The battery pack block (140) may include MxN battery modules arranged in M rows and N columns. The MxN battery modules may be connected in series to output voltage, or connected in parallel to output current. Each row may contain N battery modules. For example, the number of battery modules included in each of the first through the Mth rows may be the same at N. However, this is not limited thereto, and multiple battery modules may be included in the battery pack block (140), and the arrangement of the battery modules may also vary. For example, the number of battery modules included in each of the M rows of the battery pack block (140) may differ. For ease of understanding, the battery pack block (140) is assumed to be composed of battery modules arranged in M rows and N columns. The balancing block (130) may be configured to perform balancing on the battery pack block (140). For example, balancing may mean adjusting the charge amount of a specific battery module. In one embodiment, balancing of the battery module may be performed when the output voltage of a specific battery module differs by more than a certain amount from a reference value. Balancing of the battery module may also be performed when the amount of output current of a specific battery module differs by more than a certain amount from a reference value, or when the surface temperature of a specific battery module differs by more than a certain amount from a reference value. In another embodiment, balancing of the battery modules may be performed when the charge amount of a specific battery module differs from the charge amount of a surrounding battery module by more than a certain standard. Balancing of the battery modules may also be performed when the amount of output current of a specific battery module differs from the amount of output current of a surrounding battery module by more than a certain standard, or when the surface temperature of a specific battery module differs from the surface temperature of a surrounding battery module by more than a standard. The balancing block (130) may include a plurality of balancing modules. The number of the plurality of balancing modules may be equal to the number of battery modules of the battery pack block (140). For example, if the battery pack block (140) includes MxN battery modules, the balancing block (130) may also include MxN balancing modules arranged in M rows and N columns. Each balancing module can correspond one-to-one with a battery module. For example, N first balancing modules in the first row (R1) can each be connected to N battery modules in the first row (R1), N second balancing modules in the second row can each be connected to N battery modules in the second row, and N Mth balancing modules in the Mth row can each be connected to N battery modules in the Mth row. The balancing control block (120) may be configured to output an output signal containing status information for t