Integrated battery module and battery assembly

Abstract

The utility model provides an integrated battery module and a battery assembly. The integrated battery module comprises an integrated circuit board and a battery pack, the integrated circuit board comprises two signal transmission ports and a control unit; the two signal transmission ports are respectively arranged at the first end and the second end of the integrated circuit board; the signal transmission port comprises a signal plug connector; the battery pack comprises a plurality of single batteries; the positive poles and the negative poles of the plurality of single batteries are connected through a plurality of copper bars; the control unit is connected with the battery pack and used for obtaining target voltage data of the battery pack and sending the target voltage data to the battery management system through the signal transmission port. By using the control unit arranged on the integrated circuit board, data acquisition can be realized and analog-to-digital conversion can be carried out on the acquired data. Data after analog-to-digital conversion can be sent to a battery management system by using a signal transmission port arranged on the integrated circuit board.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an integrated battery module and a battery assembly. Background Art

[0002] In the prior art, multiple Cell Monitor Units (CMUs) are usually connected to the Battery Manage System (BMS), and then multiple circuit boards are connected to the centralized management units; the circuit boards are connected to the battery pack to collect analog signals of voltage data and send them to the centralized management unit; the centralized management unit performs analog-to-digital conversion on the analog signals of voltage data to obtain digital signals of voltage data, and sends the digital signals of voltage data to the battery management system. In the prior art, the battery management system, multiple centralized management units, and multiple circuit boards constitute a communication link, which has the disadvantage of complex wiring. Utility Model Content

[0003] The present application provides an integrated battery module and battery assembly to solve the problems of difficult wiring and easy interruption of data transmission in existing battery modules and battery assemblies.

[0004] In a first aspect, the present application provides an integrated battery module (1), wherein the integrated battery module (1) comprises an integrated circuit board (10) and a battery pack (20);

[0005] The integrated circuit board (10) comprises two signal transmission ports (102) and a control unit (101);

[0006] The two signal transmission ports (102) are respectively arranged at the first end and the second end of the integrated circuit board (10); the signal transmission port (102) comprises a signal connector;

[0007] The battery pack (20) comprises a plurality of single cells (201); the positive poles (2011) and the negative poles (2012) of the plurality of single cells (201) are connected via a plurality of copper bars (202);

[0008] The control unit (101) is connected to the battery pack (20) and is used to obtain target voltage data of the battery pack (20), and to send the target voltage data to the battery management system (2) via the signal transmission port (102).

[0009] In some embodiments, the control unit (101) includes a battery sampling chip.

[0010] In some embodiments, the integrated circuit board (10) comprises a plurality of safety devices (103); the plurality of safety devices (103) are connected to the plurality of copper bars (202) in a one-to-one correspondence;

[0011] The control unit (101) is connected to the battery pack (20) via the plurality of safety devices (103).

[0012] In some embodiments, the integrated circuit board (10) includes a thermistor (104); the thermistor (104) is connected to the control unit (101); the thermistor (104) is in contact with the battery pack (20); the control unit (101) is used to obtain resistance data of the thermistor (104), and send the resistance data to the battery management system (2) through the signal transmission port (102).

[0013] In some embodiments, the integrated circuit board (10) includes a flexible circuit board.

[0014] In some embodiments, the integrated battery module (1) comprises a plastic support plate (105); the plastic support plate (105) is arranged at the bottom of the integrated circuit board (10); and the plurality of copper bars (202) are embedded on the plastic support plate (105).

[0015] In some embodiments, CAN communication is adopted between the signal transmission port (102) and the battery management system (2).

[0016] In a second aspect, the present application further provides a battery assembly, the battery assembly comprising a battery management system (2), and a plurality of integrated battery modules (1) as described in any one of the first aspects;

[0017] The signal transmission ports (102) of the integrated circuit boards (10) are connected in sequence using a wire-to-board connector / wire-to-wire connector; the signal transmission port (102) of the head-end integrated circuit board (10) and the signal transmission port (102) of the tail-end integrated circuit board (10) are respectively connected to the battery management system (2) to form a ring communication link;

[0018] The control unit (101) of the integrated circuit board (10) is used to obtain target voltage data and resistance data, and send the target voltage data and the resistance data to the battery management system (2) through the signal transmission port (102);

[0019] The battery management system (2) is used to receive the target voltage data and the resistance data.

[0020] In some embodiments, the ring communication link includes a first communication link, a second communication link, and a midpoint;

[0021] The first communication link is the integrated battery module (1) passed from the midpoint to the battery management system (2) along the first direction; the second communication link is the integrated battery module (1) passed from the midpoint to the battery management system (2) along the second direction; the second direction is the opposite direction of the first direction; the midpoint is the midpoint of the communication link formed by multiple integrated battery modules (1);

[0022] The control unit (101) in the first communication link is used to send the target voltage data and the resistance data to the battery management system (2) along a first direction through a signal transmission port (102);

[0023] The control unit (101) in the second communication link is used to send the target voltage data and the resistance data to the battery management system (2) along a second direction via a signal transmission port (102).

[0024] In some embodiments, the ring communication link includes a third communication link, a fourth communication link, and a breakpoint;

[0025] The third communication link is the integrated battery module (1) passed from the breakpoint to the battery management system (2) along the third direction; the fourth communication link is the integrated battery module (1) passed from the breakpoint to the battery management system (2) along the fourth direction; the fourth direction is the opposite direction of the third direction;

[0026] The control unit (101) in the third communication link is used to send the target voltage data and the resistance data to the battery management system (2) along a third direction through a signal transmission port (102);

[0027] The control unit (101) in the fourth communication link is used to send the target voltage data and the resistance data to the battery management system (2) along a fourth direction via a signal transmission port (102).

[0028] The present application can achieve the following beneficial effects: The present application removes the centralized management unit, which can effectively simplify the structure of the battery assembly and reduce the difficulty of wiring. Using the control unit arranged on the integrated circuit board, data collection can be realized and the collected data can be converted from analog to digital. Using the signal transmission port arranged on the integrated circuit board, the analog-to-digital converted data can be sent to the battery management system. Furthermore, the multiple integrated battery assemblies in the present application constitute a ring communication link. In the event of a breakpoint, multiple integrated battery modules can still send the target voltage data and resistance data to the battery management system through different data transmission directions to avoid data transmission interruption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the structure of a battery assembly in the prior art provided for an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of an integrated battery module provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the structure of an integrated battery module provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the structure of an integrated battery module provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the structure of a battery assembly provided in an embodiment of the present application;

[0035] Figure 6 A schematic diagram of the structure of a battery assembly provided in an embodiment of the present application;

[0036] Figure 7 A schematic diagram of the structure of a battery assembly provided in an embodiment of the present application;

[0037] Figure 8 A schematic diagram of the structure of an integrated battery module provided in an embodiment of the present application;

[0038] Fig. 9 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0039] Fig.10 A schematic diagram of the structure of an integrated battery module provided in an embodiment of the present application;

[0040] Fig.11 A circuit diagram of an integrated circuit board provided in an embodiment of the present application;

[0041] Fig.12 A circuit diagram of a voltage detection circuit provided in an embodiment of the present application;

[0042] Fig.13 A circuit diagram of an equalizing circuit provided in an embodiment of the present application.

[0043] Reference numerals:

[0044] 1-integrated battery module, 10-integrated circuit board, 101-control unit, 102-signal transmission port, 103-fuse device, 104-thermistor, 105-plastic support plate, 106-voltage detection circuit, 107-balancing circuit;

[0045] 20-battery pack, 201-single cell, 2011-positive pole, 2012-negative pole, 202-copper busbar;

[0046] 2-Battery management system, 3-Centralized management unit, 4-Conventional circuit board;

[0047] 001-first integrated circuit board, 002-second integrated circuit board, 003-third integrated circuit board, 004-fourth integrated circuit board, 005-fifth integrated circuit board, 006-sixth integrated circuit board, 701-first interface, 702-second interface. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the article or device including the elements.

[0051] Figure 1 The structure of the battery assembly in the prior art is shown. Usually, multiple centralized management units 3 (Cell Monitor Unit, CMU) are respectively connected to the battery management system 2 (Battery Manage System, BMS) for signal connection (for example, connected by connectors), and then multiple conventional circuit boards 4 are respectively connected to the centralized management unit 3 for signal connection (for example, connected by connectors). Conventional circuit boards 4 and battery packs 20 are connected to form a battery module. Conventional circuit boards 4 are used to collect analog signals of voltage data of the battery pack 20, but do not have the function of analog-to-digital conversion. Therefore, conventional circuit boards 4 send the collected analog signals of voltage data to the centralized management unit 3. The positive poles and negative poles of multiple battery packs 20 are electrically connected (for example, connected by copper bars) to power the load equipment. After the centralized management unit 3 performs analog-to-digital conversion on the analog signals of the voltage data, a digital signal of the voltage data is obtained, and the digital signal of the voltage data is sent to the battery management system 2. The battery management system 2 is used to monitor and manage the health status SOH, remaining capacity SOC and other information of each single cell in the battery pack 20 according to the digital signal of the voltage data, so as to maintain the state consistency of the single cell. In the prior art, the communication link is composed of the battery management system 2, the centralized management unit 3, and the conventional circuit board 4. It is necessary to wire between the battery management system 2 and the centralized management unit 3, and it is also necessary to wire between the centralized management unit 3 and the conventional circuit board 4. Therefore, there are the disadvantages of complex wiring and difficult installation. Furthermore, when a centralized management unit is damaged, the conventional circuit board 4 connected to the centralized management unit cannot transmit voltage data to the battery management unit 02, so there is a disadvantage that data transmission is easily interrupted.

[0052] In view of the fact that existing battery modules and battery assemblies have wiring difficulties and data transmission is easily interrupted, the present application proposes an integrated battery module and battery assembly to overcome the above problems.

[0053] An integrated battery module and battery assembly provided by the present application are introduced below in conjunction with the accompanying drawings.

[0054] In some embodiments, please refer to Figure 2 The present application proposes an integrated battery module 1, which includes an integrated circuit board 10 and a battery pack 20; the integrated circuit board 10 includes two signal transmission ports 102 and a control unit 101; the two signal transmission ports 102 are respectively arranged at the first end and the second end of the integrated circuit board 10; the signal transmission port 102 includes a signal connector; the battery pack 20 includes a plurality of single cells 201; the battery pack 20 also includes a plurality of copper busbars 202; the positive poles 2011 and the negative poles 2012 of the plurality of single cells 201 are connected through a plurality of copper busbars 202; the control unit 101 is connected to the battery pack 20, and is used to obtain the target voltage data of the battery pack 20, and send the target voltage data to the battery management system 2 through the signal transmission port 102.

[0055] In some embodiments, the first end and the second end are symmetrically distributed. For example, the first end of the integrated circuit board 10 may be the left end of the integrated circuit board 10 ; the second end of the integrated circuit board 10 may be the right end of the integrated circuit board 10 .

[0056] In some embodiments, the signal transmission port 102 includes a signal connector; specifically, the PIN pin specification of the signal connector can be set to CAN_H, CAN_L, KL_30, KL_31, etc., and the communication protocol can be set to CAN, CAN_FD or LIN.

[0057] In some embodiments, the control unit 101 includes a battery sampling chip (Analog Front End, AFE). The battery sampling chip is also called an analog front end chip, which has a built-in analog-to-digital converter that can convert analog signals into digital signals.

[0058] In some embodiments, the integrated circuit board 10 is directly or indirectly connected to the battery management system 2 through the signal transmission port 102. The integrated circuit board 10 transmits voltage data, resistance data, current data, etc. to the battery management system 2 through the signal transmission port 102.

[0059] In some embodiments, the number of single cells 201 in each battery pack 20 is set to N, and the number of copper bars 202 is N+1. The positive poles 2011 and negative poles 2012 of multiple single cells 201 are connected through the copper bars 202, and the positive pole 2011 of the first single cell 201 is connected to a copper bar 202 alone, and the negative pole 2012 of the last single cell 201 is connected to a copper bar 202 alone. Alternatively, the negative pole 2012 of the first single cell 201 is connected to a copper bar 202 alone, and the positive pole 2011 of the last single cell 201 is connected to a copper bar 202 alone.

[0060] In some embodiments, the positive and negative poles of the first single cell and the last single cell in different battery groups 20 are connected through a copper bus 202, and multiple battery groups 20 are connected in series to supply power to the load device.

[0061] The control unit 101 collects the initial voltage data at each copper bus 202, which is recorded as v i (where i represents the serial number of the copper busbar 202, i=0, 1, 2, ..., N). The initial voltage data v at the copper busbar 202 i is equal to the voltage data at the pole connected to the copper bus 202. The initial voltage data is an analog signal. The control unit 101 converts the initial voltage data into a digital signal through a built-in analog-to-digital converter to obtain the target voltage data V i Further, the control unit 101 sends the target voltage data to the battery management system 2 through the signal transmission port 102 . After receiving the target voltage data, the battery management system 2 can calculate the positive and negative electrode potential difference of each single battery 201 .

[0062] For example, the potential difference between the positive and negative electrodes of the first single cell 201 is equal to the difference between V1 and V0; the potential difference between the positive and negative electrodes of the second single cell 201 is equal to the difference between V2 and V1; the potential difference between the positive and negative electrodes of the third single cell 201 is equal to the difference between V3 and V2; the potential difference between the positive and negative electrodes of the Nth single cell 201 is equal to V N With V N-1 The difference.

[0063] In some embodiments, please refer to Figure 3 The integrated circuit board 10 includes a plurality of fuses 103; the plurality of fuses 103 are connected to the plurality of copper bars 202 in a one-to-one correspondence; the control unit 101 is connected to the battery pack 20 through the plurality of fuses 103. The fuse 103 includes a fuse; the fuse includes but is not limited to: a copper fuse, an aluminum fuse, a copper-nickel alloy fuse, a copper-zinc alloy fuse, and an aluminum alloy fuse.

[0064] Specifically, when the current of a copper busbar 202 is too large or the temperature is too high, the fuse 103 connected to the copper busbar 202 is blown, and the connection between the corresponding single battery 201 and the control unit 101 is disconnected to prevent the control unit 101 from being damaged by excessive current.

[0065] In some embodiments, please refer to Figure 3 The integrated circuit board 10 includes a thermistor 104; the thermistor 104 is connected to the control unit 101; the thermistor 104 is in contact with the battery pack 20; the control unit 101 is used to obtain resistance data of the thermistor 104 and send the resistance data to the battery management system 2 through the signal transmission port 102.

[0066] Specifically, the control unit 101 is used to collect the analog signal of the resistance data, perform analog-to-digital conversion, obtain the digital signal of the resistance data, and send the digital signal of the resistance data to the battery management system 2 through the signal transmission port 102. The battery management system 2 is used to calculate the battery temperature of the battery pack 20 according to the resistance data.

[0067] Specifically, the number of thermistors 104 may be one or more. The multiple thermistors may be in contact with different positions of the battery pack 20 to generate different resistance data according to the battery temperatures at different positions.

[0068] In some embodiments, the type of the integrated circuit board 10 includes a flexible printed circuit (FPC), which has the characteristics of light weight, thin thickness, and easy bending.

[0069] In some embodiments, see Figure 4 The integrated battery module 1 includes a plastic support plate 105; the plastic support plate 105 is arranged at the bottom of the integrated circuit board 10; and the plurality of copper bars 202 are embedded in the plastic support plate 105. The plastic support plate 105 is used to provide support for the integrated circuit board 10 and to embed and fix the copper bars 202. Further, the plastic support plate 105 is also used to fix the integrated circuit board 10 to the battery pack 20.

[0070] In some embodiments, the signal transmission port 102 and the battery management system 2 use CAN communication. CAN (Controller Area Network) communication is controller area network bus communication, which is a serial communication protocol bus used for real-time applications, and can use twisted pair cables to transmit signals.

[0071] In some embodiments, the control unit 101 , the safety device 103 , and the thermistor 104 may be mounted on the integrated circuit board 10 using surface mount technology (SMT).

[0072] This application proposes a battery assembly, see Figure 5 As shown, the battery assembly includes a battery management system 2 and a plurality of integrated battery modules 1 as in any one of the above embodiments. It should be noted that: Figure 5 The inclusion of six integrated battery modules 1 is merely an exemplary illustration, and the present application does not limit the number of integrated battery modules 1 .

[0073] In some embodiments, the signal transmission port 102 of the integrated circuit board 10 is connected in sequence (signal connection) using a wire-to-board connector / wire-to-wire connector; the signal transmission port 102 of the head-end integrated circuit board 10 and the signal transmission port 102 of the tail-end integrated circuit board 10 are respectively connected to the battery management system 2 to form a ring communication link; the control unit 101 of the integrated circuit board 10 is used to obtain target voltage data and resistance data, and send the target voltage data and the resistance data to the battery management system 2 through the signal transmission port 102; the battery management system 2 is used to receive the target voltage data and the resistance data. The battery packs 20 are electrically connected using copper bars 202.

[0074] In some embodiments, the battery management system 2 may be equipped with a power supply chip for supplying power to the multiple integrated battery modules 1 .

[0075] In some embodiments, the integrated circuit board 10 uses the “shortest path” when sending data to the battery management system 2 , that is, uses the path that passes through the least number of integrated circuit boards 10 .

[0076] In some embodiments, see Figure 5 As shown, the annular communication link includes a first communication link, a second communication link, and a midpoint;

[0077] The first communication link is the integrated battery module 1 passed from the midpoint to the battery management system 2 along the first direction; the second communication link is the integrated battery module 1 passed from the midpoint to the battery management system 2 along the second direction; the second direction is the opposite direction of the first direction; the midpoint is the midpoint of the communication link formed by multiple integrated battery modules 1;

[0078] The control unit 101 in the first communication link is used to send the target voltage data and the resistance data to the battery management system 2 along a first direction through the signal transmission port 102;

[0079] The control unit 101 in the second communication link is used to send the target voltage data and the resistance data to the battery management system 2 along the second direction through the signal transmission port 102 .

[0080] Specifically, in the first communication link, the target voltage data and the resistance data sequentially pass through the integrated circuit board 10 along the first direction, are transmitted between the integrated circuit boards 10 through the signal transmission port 102, and finally reach the battery management system 2. In the second communication link, the target voltage data and the resistance data sequentially pass through the integrated circuit board 10 along the second direction, are transmitted between the integrated circuit boards 10 through the signal transmission port 102, and finally reach the battery management system 2.

[0081] In some embodiments, if the ring communication link includes an odd number of integrated battery modules 1, at this time, the integrated battery module 1 located at the midpoint can send target voltage data and resistance data along the first direction or along the second direction.

[0082] In some embodiments, before the integrated circuit board 10 collects the target voltage data and resistance data, the control unit 101 of each integrated circuit board 10 can send two inquiry signals to the battery management system 2 from two signal transmission ports 102 respectively, and the inquiry signal carries the identification of the integrated circuit board 10, and the two inquiry signals have different transmission paths to reach the battery management system 2. After receiving the inquiry signal, the battery management system 2 can determine the shortest path from each integrated circuit board 10 to the battery management system 2 according to the arrival time of the inquiry signal and the identification of the integrated circuit board 10, that is, the first direction and the second direction can be determined.

[0083] Based on the above embodiment, the centralized management unit is removed, which can effectively simplify the structure of the battery assembly. It is not necessary for all battery assemblies to be connected to the centralized management unit, so the length of the signal connection line can be standardized, reducing the difficulty of wiring. Using the control unit 101 arranged on the integrated circuit board 10, data collection can be realized and the collected data can be converted into analog to digital. Using the signal transmission port 102 arranged on the integrated circuit board 10, the data after analog to digital conversion can be sent to the battery management system 2.

[0084] In some embodiments, see Figure 6 As shown, the annular communication link includes a third communication link, a fourth communication link, and a breakpoint;

[0085] The third communication link is the integrated battery module 1 passed from the breakpoint to the battery management system 2 along the third direction; the fourth communication link is the integrated battery module 1 passed from the breakpoint to the battery management system 2 along the fourth direction; the fourth direction is the opposite direction of the third direction;

[0086] The control unit 101 in the third communication link is used to send the target voltage data and the resistance data to the battery management system 2 along the third direction through the signal transmission port 102;

[0087] The control unit 101 in the fourth communication link is used to send the target voltage data and the resistance data to the battery management system 2 along a fourth direction through the signal transmission port 102 .

[0088] Specifically, in the third communication link, the target voltage data and the resistance data sequentially pass through the integrated circuit board 10 along the third direction, are transmitted between the integrated circuit boards 10 through the signal transmission port 102, and finally reach the battery management system 2. In the fourth communication link, the target voltage data and the resistance data sequentially pass through the integrated circuit board 10 along the fourth direction, are transmitted between the integrated circuit boards 10 through the signal transmission port 102, and finally reach the battery management system 2.

[0089] Based on the above embodiments, since the integrated battery module and the battery management system form a ring link, when a breakpoint occurs in the battery assembly, any one of the multiple integrated battery modules can still send the target voltage data and resistance data to the battery management system to avoid data transmission interruption. Thus, the battery management system including the technical solution of the present application meets the functional safety (FuSa) requirements.

[0090] For a specific scenario example, see Figure 7As shown, the first integrated circuit board 001, the second integrated circuit board 002, the third integrated circuit board 003, the fourth integrated circuit board 004, the fifth integrated circuit board 005, and the sixth integrated circuit board 006 are connected in sequence through the signal transmission port. The first integrated circuit board 001 is a head-end integrated circuit board, and the signal transmission port at the left end is connected to the first interface 701 of the battery management system 2; the sixth integrated circuit board 006 is a tail-end integrated circuit board, and the signal transmission port at the left end is connected to the second interface 702 of the battery management system 2. The battery management system 2 sends a first detection signal to the first integrated circuit board 001 through the first interface 701 at a preset time interval. In the absence of a breakpoint, the first integrated circuit board 001, the second integrated circuit board 002, the third integrated circuit board 003, the fourth integrated circuit board 004, the fifth integrated circuit board 005, and the sixth integrated circuit board 006 transmit the first detection signal in sequence, and finally the battery management system 2 receives the first detection signal from the second interface 702. If the battery management system 2 cannot receive the first detection signal from the second interface 702, it can be determined that there is a breakpoint. In the case of determining that there is a breakpoint, it is necessary to further determine the location of the breakpoint. The battery management system 2 sends a second detection signal to the first integrated circuit board 001 through the first interface 701, and then the second detection signal is transmitted in a clockwise direction in multiple integrated circuit boards, and each integrated circuit board that receives the second detection signal sends a response signal to the battery management system 2, and the response signal carries the identification of the integrated circuit board, so that the battery management system 2 can determine the source of the response signal according to the identification of the integrated circuit board. The response signal is transmitted to the battery management system 2 in the opposite direction of the transmission direction of the second detection signal. The vicinity of the last integrated circuit board that sends a response signal is the breakpoint position. For example, the first integrated circuit board 001, the second integrated circuit board 002, the third integrated circuit board 003, and the fourth integrated circuit board 004 send response signals, and the fifth integrated circuit board 005 and the sixth integrated circuit board 006 do not send response signals, then it can be determined that the location of the breakpoint is between the fourth integrated circuit board 004 and the fifth integrated circuit board 005. Further, the first integrated circuit board 001, the second integrated circuit board 002, the third integrated circuit board 003, and the fourth integrated circuit board 004 use the counterclockwise direction as the third direction, and subsequently send the target voltage data and resistance data to the battery management system 2 along the third direction, and the battery management system 2 receives the target voltage data and resistance data using the first interface 701. The fifth integrated circuit board 005 and the sixth integrated circuit board 006 use the clockwise direction as the fourth direction, and subsequently send the target voltage data and resistance data to the battery management system 2 along the fourth direction, and the battery management system 2 receives the target voltage data and resistance data using the second interface 702.

[0091] In some embodiments, see Figure 8 As shown, in the integrated circuit board 10, a voltage detection circuit 106 and an equalization circuit 107 are also arranged; and the voltage detection circuit 106 and the equalization circuit 107 are connected to the control unit 101, and the voltage detection circuit 106 is connected to the copper bus 202 in the battery pack 20. The control unit 101 can obtain the initial voltage data at the copper bus 202 through the voltage detection circuit 106. CAN communication is performed between the signal transmission port 102 and the battery management system 2. The control unit 101 can realize circuit balancing through the equalization circuit 107.

[0092] In some embodiments, see Fig. 9 As shown, a battery pack 20 includes 12 single cells 201 , and each single cell has a positive electrode column 2011 and a negative electrode column 2012 .

[0093] In some embodiments, see Fig.10 As shown, the positive poles and negative poles of two adjacent single cells 201 are connected by a copper bus 202. An integrated circuit board 10 is provided above the battery pack, a plastic support plate 105 is provided between the battery pack and the integrated circuit board 10, and the copper bus 202 is embedded in the plastic support plate 105; and the copper bus 202 is connected to the control unit 101 through a wire laid inside the integrated circuit board 10. A signal transmission port 102 is provided at the first end and the second end of the integrated circuit board 10, respectively.

[0094] In some embodiments, Fig.11 The circuit diagram of the integrated circuit board is shown. CT1, CT2, CT3, CT4, CT5, CT6, CT7, CT8, CT9, CT10, CT11, CT12, and CT13 are connected to the voltage detection circuit. NTC1 is connected to the thermistor.

[0095] In some embodiments, Fig.12 Indicates a voltage detection circuit, PC1, PC2, PC3, PC4, PC5, PC6, PC7, PC8, PC9, PC10, PC11, PC12, PC13 and copper busbars are connected one by one.

[0096] In some embodiments, the battery pack reaches the end of its life when the capacity of the weakest cell is too low to be used. To reduce the impact of this problem, cell balancing is critical. The purpose of cell balancing is to keep the voltage of the cells within a small range, thereby ensuring that each cell remains in the same state during normal use to avoid overcharging and over-discharging. Unbalanced cells may be caused by differences in battery temperature, different self-discharge rates, and production tolerances of battery chemistry that lead to different aging rates of parallel battery strings. Cell balancing can keep the voltage of each cell within a specified safe operating area (SOA), thereby extending the service life of the battery pack. Excessively mismatched or unbalanced cells can be detected by monitoring the maximum and minimum cell voltages. Balancing circuits are used to balance mismatched cells. Fig.13 Indicates a balancing circuit, PC1, PC2, PC3, PC4, PC5 are connected to the copper bus, and through the connected resistors R5, R6, R7, R8, R9, R10, R11, the energy higher than that of other single cells is released to achieve the balance of each single cell. Each single cell is directly connected in series with a resistor, or in series with two parallel resistors. This structure is simple to control and has a fast discharge speed. It can control multiple single cells to discharge simultaneously.

[0097] In summary, although the present application has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. An integrated battery module (1), characterized in that: The integrated battery module (1) comprises an integrated circuit board (10) and a battery pack (20); The integrated circuit board (10) comprises two signal transmission ports (102) and a control unit (101); The two signal transmission ports (102) are respectively arranged at the first end and the second end of the integrated circuit board (10); the signal transmission port (102) comprises a signal connector; The battery pack (20) comprises a plurality of single cells (201); the positive poles (2011) and the negative poles (2012) of the plurality of single cells (201) are connected via a plurality of copper bars (202); The control unit (101) is connected to the battery pack (20) and is used to obtain target voltage data of the battery pack (20), and to send the target voltage data to the battery management system (2) via the signal transmission port (102).

2. The integrated battery module (1) according to claim 1, characterized in that: The control unit (101) comprises a battery sampling chip.

3. The integrated battery module (1) according to claim 1, characterized in that: The integrated circuit board (10) comprises a plurality of safety devices (103); the plurality of safety devices (103) are connected to the plurality of copper bars (202) in a one-to-one correspondence; The control unit (101) is connected to the battery pack (20) via the plurality of safety devices (103).

4. The integrated battery module (1) according to claim 1, characterized in that: The integrated circuit board (10) comprises a thermistor (104); the thermistor (104) is connected to the control unit (101); the thermistor (104) is in contact with the battery pack (20); the control unit (101) is used to obtain resistance data of the thermistor (104), and send the resistance data to the battery management system (2) through the signal transmission port (102).

5. The integrated battery module (1) according to claim 1, characterized in that: The integrated circuit board (10) comprises a flexible circuit board.

6. The integrated battery module (1) according to claim 1, characterized in that: The integrated battery module (1) comprises a plastic support plate (105); the plastic support plate (105) is arranged at the bottom of the integrated circuit board (10); and the plurality of copper bars (202) are embedded in the plastic support plate (105).

7. The integrated battery module (1) according to claim 1, characterized in that: CAN communication is adopted between the signal transmission port (102) and the battery management system (2).

8. A battery assembly, characterized in that: The battery assembly comprises a battery management system (2), and a plurality of integrated battery modules (1) according to any one of claims 1 to 7; The signal transmission ports (102) of the integrated circuit boards (10) are connected in sequence using a wire-to-board connector / wire-to-wire connector; the signal transmission port (102) of the head-end integrated circuit board (10) and the signal transmission port (102) of the tail-end integrated circuit board (10) are respectively connected to the battery management system (2) to form a ring communication link; The control unit (101) of the integrated circuit board (10) is used to obtain target voltage data and resistance data, and send the target voltage data and the resistance data to the battery management system (2) through the signal transmission port (102); The battery management system (2) is used for receiving the target voltage data and the resistance data.

9. The battery assembly according to claim 8, characterized in that: The annular communication link includes a first communication link, a second communication link, and a midpoint; The first communication link is the integrated battery module (1) passed from the midpoint to the battery management system (2) along the first direction; the second communication link is the integrated battery module (1) passed from the midpoint to the battery management system (2) along the second direction; the second direction is the opposite direction of the first direction; the midpoint is the midpoint of the communication link formed by multiple integrated battery modules (1); The control unit (101) in the first communication link is used to send the target voltage data and the resistance data to the battery management system (2) along a first direction through a signal transmission port (102); The control unit (101) in the second communication link is used to send the target voltage data and the resistance data to the battery management system (2) along a second direction via a signal transmission port (102).

10. The battery assembly according to claim 8, characterized in that: The annular communication link includes a third communication link, a fourth communication link, and a breakpoint; The third communication link is the integrated battery module (1) passed from the breakpoint to the battery management system (2) along the third direction; the fourth communication link is the integrated battery module (1) passed from the breakpoint to the battery management system (2) along the fourth direction; the fourth direction is the opposite direction of the third direction; The control unit (101) in the third communication link is used to send the target voltage data and the resistance data to the battery management system (2) along a third direction through a signal transmission port (102); The control unit (101) in the fourth communication link is used to send the target voltage data and the resistance data to the battery management system (2) along a fourth direction via a signal transmission port (102).

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