Battery system, battery management system sharing method, and computer program

Abstract

The present invention relates to a battery system, a method for sharing a battery management system, and a non-temporary computer-readable recording medium, wherein the battery system includes a battery module including a plurality of battery terminals and a plurality of battery cells connected in series, a CMC including a plurality of input terminals and a BMIC that monitors the cell voltage of each of the plurality of battery cells based on signals received from the plurality of input terminals, and a branching board including a plurality of wires that provide a power path connecting the plurality of battery terminals and the plurality of input terminals, and a plurality of switches connected between one end of each of two adjacent wires among the plurality of wires, and which switch in a connection pattern determined as control of the BMIC.

Claims

1. A battery module containing multiple battery terminals and multiple battery cells connected in series; A cell monitor control unit (CMC) including a plurality of input terminals, a battery voltage input terminal connected to a node on the wiring to which the positive terminal of the battery module is connected, and a battery monitoring integrated circuit (BMIC) that monitors the cell voltage of each of the plurality of battery cells based on signals received from the plurality of input terminals; and The branch board includes a plurality of wires that provide a power path connecting the plurality of battery terminals and the plurality of input terminals of the CMC, and a plurality of switches, each having one end connected to one of a plurality of adjacent wires included in the plurality of wires and the other end connected to the other wire, and performing switching operation in a connection pattern determined by the control of the BMIC. A battery system in which each of the plurality of battery cells is connected between two corresponding adjacent terminals of the plurality of battery terminals.

2. Of the plurality of battery terminals, the reference battery terminal connected to the positive terminal of the k-th battery cell among the plurality of battery cells is electrically connected to the reference wiring among the plurality of wirings. Of the plurality of battery cells, each of the k lower battery cells has one end connected to one of two adjacent wires included in the reference wire and the plurality of lower wires below the reference wire, and the other end connected to the other wire. Each of the plurality of switches has one end connected to one of two adjacent wires included in the reference wire and the plurality of upper wires above the reference wire, and the other end connected to the other wire. The aforementioned k is, The number of battery cells connected to the battery terminals among the plurality of battery terminals that are not connected to the plurality of switches, and which is a natural number of 1 or more. The battery system according to claim 1.

3. The maximum number of battery cells connected in series that the BMIC can monitor the cell voltage of is N-1. The aforementioned BMIC is The coupling pattern is determined based on the voltage value received from the battery voltage input terminal of the CMC while controlling the switching operation of each of the plurality of switches. The number of the aforementioned switches is m. The aforementioned m is a natural number greater than or equal to 1 and less than the aforementioned N. The above N is a natural number greater than or equal to 2. The battery system according to claim 2.

4. The aforementioned BMIC is After turning off all of the aforementioned switches, the switches are turned on one by one, starting from the top switch, and when the first voltage value received from the battery voltage input terminal of the CMC with only x-1 upper switches of the aforementioned switches turned on is within the previously stored reference module voltage range, and the second voltage value received with only x upper switches of the aforementioned switches turned on exceeds the reference module voltage range, the state with only x upper switches turned on is determined as the coupling pattern. The aforementioned x is an integer between 1 and m. The battery system according to claim 3.

5. The aforementioned BMIC is After turning on all of the aforementioned switches, the switches are turned off one by one, starting from the bottom switch, and if the fourth voltage value received when only y lower switches are turned off is smaller than the third voltage value received when only y lower switches are turned off from the battery voltage input terminal of the CMC, then the state with only y lower switches turned off is determined as the coupling pattern. The above y is the largest integer between 0 and m, The battery system according to claim 3.

6. The BMIC receives the voltage value in the coupling pattern from the BMC which has received the voltage value from the battery voltage input terminal of the CMC in the coupling pattern, determines the voltage value in the coupling pattern as the module voltage of the battery module, and verifies the coupling pattern based on the module voltage. The battery system according to any one of claims 3 to 5.

7. The aforementioned master BMS is Based on the module voltage, the number n of the plurality of battery cells is derived, the number n1 of battery cells on the power path of the connection pattern is derived, and based on the result of comparing n and n1, it is determined whether the connection pattern corresponds to the module voltage. Each of the above n and n1 is a natural number greater than or equal to 1. The battery system according to claim 6.

8. The aforementioned master BMS is When it is determined that the coupling pattern corresponds to the module voltage, a cell voltage monitoring command is transmitted to the BMIC to derive the cell voltage of each of the plurality of battery cells. The battery system according to claim 7.

9. The aforementioned master BMS is If it is determined that the coupling pattern does not correspond to the module voltage, the BMIC is instructed to re-determine the coupling pattern. The battery system according to claim 7.

10. A method for sharing a battery management system for a battery system, comprising a battery module including multiple battery terminals and multiple battery cells connected in series, a cell monitor control unit (CMC) including multiple input terminals and a battery voltage input terminal connected to a node on a wiring to which the positive terminals of the battery module are connected, multiple wirings providing a power path connecting the multiple battery terminals and the multiple input terminals of the CMC, and a branch board including multiple switches, one end of which is connected to one of two adjacent wirings included in the multiple wirings, and the other end of which is connected to the other wiring, A step of controlling the switching operation of the plurality of switches; and The step includes determining the coupling pattern of the plurality of switches based on the voltage value received from the battery voltage input terminal of the CMC, Each of the plurality of battery cells is connected between two corresponding adjacent terminals of the plurality of battery terminals, Methods for sharing battery management systems.

11. Of the plurality of battery terminals, the reference battery terminal connected to the positive terminal of the k-th battery cell among the plurality of battery cells is electrically connected to the reference wiring among the plurality of wirings. Of the plurality of battery cells, each of the k lower battery cells has one end connected to one of two adjacent wires included in the reference wire and the plurality of lower wires below the reference wire, and the other end connected to the other wire. Each of the plurality of switches has one end connected to one of two adjacent wires included in the reference wire and the plurality of upper wires above the reference wire, and the other end connected to the other wire. The aforementioned k is, The number of battery cells connected to the battery terminals among the plurality of battery terminals that are not connected to the plurality of switches, and which is a natural number of 1 or more. The battery management system sharing method according to claim 10.

12. The maximum number of battery cells connected in series that the BMIC included in the CMC can monitor the cell voltage of is N-1. The number of the aforementioned switches is m. The aforementioned m is a natural number greater than or equal to 1 and less than the aforementioned N. The above N is a natural number greater than or equal to 2. The battery management system sharing method according to claim 11.

13. The step of turning off all of the aforementioned switches; A step of receiving a first voltage value from the battery voltage input terminal of the CMC with only x-1 upper switches among the plurality of switches turned ON; The steps of receiving a second voltage value from the battery voltage input terminal of the CMC with only x upper switches among the plurality of switches turned ON; and The further step includes determining the state in which only the x upper switches are turned on as the coupling pattern if the first voltage value is within the previously stored reference module voltage range and the second voltage value exceeds the reference module voltage range, The aforementioned x is an integer between 1 and m. The battery management system sharing method according to claim 12.

14. The step of turning on all of the aforementioned switches; A step of receiving a third voltage value from the battery voltage input terminal of the CMC with only y lower switches among the plurality of switches turned off; A step of receiving a fourth voltage value from the battery voltage input terminal of the CMC while only the lower switches from the lowest switch to y+1 of the plurality of switches are turned off; and If the fourth voltage value is smaller than the third voltage value, the further step includes determining that the state in which only the y lower switches are turned off is the coupling pattern. The above y is the largest integer between 0 and m, The battery management system sharing method according to claim 12.

15. A step of receiving the voltage value in the coupling pattern from the BMIC which has received the voltage value from the battery voltage input terminal of the CMC in the coupling pattern; The steps of determining the voltage value in the coupling pattern as the module voltage of the battery module; and The step further includes verifying the coupling pattern based on the module voltage, A method for sharing a battery management system according to any one of claims 12 to 14.

16. A step of deriving the number n of the plurality of battery cells based on the module voltage; A step of deriving the number n1 of battery cells on the power path of the aforementioned connection pattern; and The process further includes determining whether the coupling pattern corresponds to the module voltage based on the result of comparing n and n1, Each of the above n and n1 is a natural number greater than or equal to 1. The battery management system sharing method according to claim 15.

17. If it is determined that the coupling pattern corresponds to the module voltage, the further step includes transmitting a cell voltage monitoring command to the BMIC to derive the cell voltage of each of the plurality of battery cells. The battery management system sharing method according to claim 16.

18. If it is determined that the coupling pattern does not correspond to the module voltage, the BMIC is further instructed to re-determine the coupling pattern. The battery management system sharing method according to claim 16.

19. When executed by a processor, A method for sharing a battery management system for a battery system, comprising a battery module including multiple battery terminals and multiple battery cells connected in series, a cell monitor control unit (CMC) including multiple input terminals and a battery voltage input terminal connected to a node on a wiring to which the positive terminals of the battery module are connected, multiple wirings providing a power path connecting the multiple battery terminals and the multiple input terminals of the CMC, and a branch board including multiple switches, one end of which is connected to one of each of a plurality of adjacent wirings included in the plurality of wirings, and the other end of which is connected to the other of each of the two wirings, A step of controlling the switching operation of the plurality of switches; and The step includes determining the coupling pattern of the plurality of switches based on the voltage value received from the battery voltage input terminal of the CMC, Each of the plurality of battery cells is connected between two corresponding adjacent terminals of the plurality of battery terminals, and the computer program is used to cause the processor to perform a battery management system sharing method.

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