Battery cell data acquisition circuit connection assembly of hybrid battery module

Abstract

A battery cell data acquisition circuit connection assembly of a hybrid battery module comprises a main circuit board, the main circuit board comprises an insulation fixing film and a circuit layer, the circuit layer is composed of a metal conductor, and the metal conductor comprises a first signal output end and a first signal input end. The branch circuit boards are independently manufactured PCBs or FPC boards, and the PCBs or the FPC boards are provided with etching circuits. The etching circuit comprises a second signal output end and a second signal input end, and the second signal output end is electrically connected with the first signal input end. According to the utility model, the metal conductor is fixedly attached to the insulation fixing film to form the flexible circuit board, so that the manufacturing cost of the cell data acquisition circuit connection assembly is reduced; the etching operation is reduced, and the pollution to the environment is reduced; and meanwhile, the branch circuit board adopts a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit) board which is independently manufactured, so that a high-precision fuse circuit can be arranged on the branch circuit board, and precise elements can also be completed on the branch circuit board by using an efficient SMT (Surface Mount Technology).

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a cell data acquisition circuit connection component of a hybrid battery module. Background Art

[0002] A battery module consists of multiple battery cells. To ensure the safe operation of the battery module, it is necessary to collect and monitor the operating data of each battery cell. The external battery management system uses the collected data to diagnose faults and evaluate the life of the battery cells, so that problems can be discovered and handled in a timely manner.

[0003] Currently, power battery modules primarily use FPC boards as circuit components for data acquisition and connection components, enabling the collection of data such as cell voltage and temperature. Due to the large area of ​​FPC circuit boards required for battery module data acquisition and connection components, the etching costs of FPC boards are extremely high, and the environmental pressure is also high, resulting in high manufacturing costs for data acquisition and connection components. Directly using metal conductors for circuit layout instead of etching significantly reduces manufacturing costs, but cannot meet the high-precision requirements of some circuits.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a cell data acquisition circuit connection component of a hybrid battery module to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be assumed that the above contents are well known to those skilled in the art simply because they are explained in the background technology of the present invention. Utility Model Content

[0006] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of the present invention is to disclose a cell data acquisition circuit connection component of a hybrid battery module, which is used to solve the problems of difficulty in reducing the manufacturing cost of the cell data acquisition circuit connection component and severe environmental pollution.

[0007] The utility model discloses a cell data acquisition circuit connection component of a hybrid battery module, comprising:

[0008] A main circuit board includes an insulating fixing film and a circuit layer. The circuit layer is composed of a metal conductor that is relatively fixedly attached to the surface of the insulating fixing film and includes a first signal output terminal and a first signal input terminal. By attaching the metal conductor to the insulating fixing film to form a flexible circuit board, replacing an FPC board for data transmission, the manufacturing process eliminates the need for etching, significantly reducing manufacturing costs.

[0009] Multiple branch circuit boards, each made of a separate PCB or FPC, are provided with etched circuits. The etched circuits are highly precise, allowing for soldering of delicate components to the branch circuit boards. The etched circuits include a second signal output and a second signal input; the second signal input is connected to a battery cell for collecting cell data; the second signal output is electrically connected to the first signal input for transmitting the cell data collected by the branch circuit board to the main circuit board.

[0010] A preferred technical solution: One side of the branch circuit board is provided with a first connection portion and a second connection portion that connect to the main circuit board. A notch is provided between the first and second connection portions, and the second signal input terminal is located on the second connection portion. The first connection portion serves as a reinforcement, providing a buffer structure that releases force in emergency situations to protect the circuit soldering parts.

[0011] Preferred technical solution: The width of the first connecting portion is smaller than the width of the second connecting portion, so as to ensure that the force is released first when an abnormal external force is applied to protect the circuit and each welding connection point.

[0012] Preferred technical solution: A precise fuse circuit is etched on the branch circuit board to protect the circuit of the branch circuit board.

[0013] A preferred technical solution: The first signal output terminal is connected to a connector module, which is located on one side of the main circuit board. The connector module includes a separately manufactured PCB or FPC board and the components thereon. This facilitates connection between the external battery management system and the battery cell connection assembly.

[0014] Preferred technical solution: The metal conductor is made of one or more combinations of conductive metal wires, metal conductive narrow strips and metal films.

[0015] Preferred technical solution: The circuit layer is also covered with an insulating protective film, which is connected to the insulating fixing film to fully cover the periphery of the metal conductor to prevent the metal conductors on the main circuit board from contacting each other and causing a short circuit when the main circuit board is bent and used.

[0016] Preferred technical solution: the insulating fixing film and the insulating protective film are a combination of one or more of PI film, insulating tape, protective film or hot pressing support film.

[0017] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] The utility model discloses a cell data acquisition circuit connection component for a hybrid battery module. The component forms a flexible circuit board by fixing a metal conductor on an insulating fixed film. The component can be used in battery modules with high reliability and small space, such as electric vehicles, hybrid vehicles and renewable energy storage systems. The component is used to replace the traditional FPC board with etched printed circuits as the main circuit board of the cell data acquisition circuit connection component, which greatly reduces the manufacturing cost of the cell data acquisition circuit connection component. In addition, the main circuit board does not need to be etched in the utility model, which reduces pollution to the environment. The branch circuit board adopts a PCB board or FPC board with etched printed circuits, which has high circuit layout accuracy, so that precision components can be installed on it, and the accuracy of connection with the battery cell is guaranteed. In order to ensure the safety of the cell data acquisition circuit connection component, a fuse circuit with high precision requirements can be made on the branch circuit board, thereby realizing independent protection of each branch circuit board. A first connecting part is added between the branch circuit board and the main circuit board as a force-bearing structure to avoid loose connection between the branch circuit board and the main circuit board, and between the branch circuit board and the battery due to vibration and pulling, and unstable or even interrupted signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of a cell data acquisition circuit connection component of a hybrid battery module of the present invention;

[0021] Figure 2 This is an exploded view of the main circuit board in the present utility model;

[0022] Figure 3 This is a structural diagram of the branch circuit board in the utility model.

[0023] In the above drawings, 1. Main circuit board; 11. Insulating fixing film; 12. Circuit layer; 121. Metal conductor; 121a. First signal output terminal; 121b. First signal input terminal; 13. Insulating protective film; 2. Branch circuit board; 21. Etched circuit; 21a. Second signal output terminal; 21b. Second signal input terminal; 22. First connecting part; 23. Second connecting part; 24. Notch area; 3. Fuse circuit; 4. Connector module. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and their synonyms are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0027] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," "sleeved," and "fitted" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or internal communication between two devices, elements, or components. For another example, "fitted" can mean complete or partial contact. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Example:

[0031] like Figure 1 As shown, the utility model discloses a hybrid battery module cell data acquisition circuit connection assembly, including a main circuit board 1 and multiple branch circuit boards 2. The main components of the utility model are described in detail below:

[0032] like Figure 1 and Figure 2 As shown, the main circuit board 1 includes an insulating fixing film 11 and a circuit layer 12. Circuit layer 12 is composed of metal conductors 121. Using this circuit layer 12 composed of metal conductors 121 for data transmission reduces manufacturing costs compared to traditional etched FPC boards, eliminates the need for etching, and reduces environmental pollution. Metal conductor 121 includes a first signal output terminal 121a and a first signal input terminal 121b. Cell data collected by the branch circuit board 2 is received via first signal input terminal 121b, and this cell data is transmitted to an external battery management system for analysis and processing via first signal output terminal 121a.

[0033] like Figure 1 、 Figure 2 and Figure 3 As shown, the branch circuit board 2 is a separately manufactured PCB board or FPC board, which is provided with an etched circuit 21. The etched circuit 21 includes a second signal output terminal 21a and a second signal input terminal 21b. The second signal input terminal 21b is connected to the battery cell for collecting battery cell data. The second signal output terminal 21a is electrically connected to the first signal input terminal 121b and is used to transmit the battery cell data collected by the branch circuit board 2 to the main circuit board 1. The high precision of the etched circuit 21 ensures the connection accuracy between the branch circuit board 2 and the battery cell, thereby ensuring the accuracy of the battery cell data collection. It should be noted that in this embodiment, four branch circuit boards 2 are connected to the main circuit board 1, but in other embodiments, the number of branch circuit boards 2 can also be other.

[0034] refer to Figure 1 、 Figure 2 and Figure 3 As shown, the method and principle of use of the present invention are as follows: The present invention reduces the manufacturing cost of the main circuit board 1 by arranging a metal conductor 121 on the surface of the insulating fixed film 11; the main circuit board 1 serves as the main data transmission mechanism of the battery cell data acquisition circuit connection assembly, and its area occupies a large area, thereby greatly reducing the manufacturing cost of the battery cell data acquisition circuit connection assembly. The branch circuit board 2 is a PCB board or FPC board with an etched circuit 21, wherein the etched circuit 21 has high precision, and thus, precision components can be soldered and installed on the branch circuit board 2 using an efficient SMT method, so as to ensure that the battery cell data acquisition circuit connection assembly does not affect the data acquisition capability of the battery cell. At the same time, the high precision of the etched circuit 21 of the branch circuit board 2 can ensure the connection accuracy with the battery cell.

[0035] As a preferred embodiment, to improve the stability of signal transmission between the main circuit board 1 and the branch circuit board 2, a first connecting portion 22 and a second connecting portion 23 connected to the main circuit board 1 are provided on one side of the branch circuit board 2. A notch 24 is provided between the first connecting portion 22 and the second connecting portion 23 to separate them. The second signal input terminal 21b is provided on the second connecting portion 23. The first connecting portion 22 serves as the weak connection and stress-bearing point between the main circuit board 1 and the branch circuit board 2, thereby preventing the second signal output terminal 21a from being disconnected from the first signal input terminal 121b due to the pulling force between the main circuit board 1 and the branch circuit board 2 in a vibrating environment.

[0036] Furthermore, in order to reduce the impact of the branch circuit board 2 on the flexibility of the main circuit board 1, the first connecting portion 22 is designed to be smaller so as to serve as a weak connection portion, which can be loosened and released first when pulled by an external force.

[0037] As a preferred embodiment, in order to ensure the safety of the battery cell data acquisition circuit connection component, the fuse circuit 3 with high precision requirements can be made on the branch circuit board 2. The fuse circuit 3 of the flexible circuit board is relatively precisely designed, and it is easier to meet performance requirements when arranged on the branch circuit board 2 with higher circuit layout accuracy.

[0038] As a preferred embodiment, to facilitate signal connection between the external battery management system and the battery cell connection assembly, the first signal output terminal 121a is connected to a connector module 4. Connector module 4 is provided on one side of the main circuit board 1 and includes a separately manufactured PCB or FPC board and the components thereon. Connector module 4 allows for convenient assembly and disassembly with the external battery management system, improving installation efficiency and connection stability.

[0039] As a preferred embodiment, in order to reduce the production cost of the main circuit board 1, the metal conductor 121 is made of one or more combinations of conductive metal wires, metal conductive narrow strips and metal films, wherein: the conductive metal wires are metal wires without an insulating protective layer, and the conductive metal wires or metal conductive narrow strips can be directly wired on the insulating fixed film 11 by mechanical wiring, or the conductive metal wires can be bent, moved, arranged and fixed on the insulating fixed film 11 by a robot; by using a metal film method, the metal film can be first covered on the insulating fixed film 11, and then the circuit can be directly die-cut by die-cutting according to the circuit wiring method. The cost of the above method is much lower than the cost of making the circuit by etching.

[0040] As a preferred embodiment, in order to further improve the safety of use of the main circuit board 1, an insulating protective film 13 is also covered on the top of the circuit layer 12. The insulating protective film 13 and the insulating fixed film 11 are interconnected to fully cover the periphery of the metal conductor 121 to prevent the metal conductors 121 on the main circuit board 1 from contacting each other and causing a short circuit when the main circuit board 1 is bent for use; and to prevent the main circuit board 1 from shaking due to its own softness and contacting external conductors to cause a short circuit when used in a vibrating environment.

[0041] As a preferred embodiment, in order to further reduce the production cost of the main circuit board 1, the insulating fixing film 11 and the insulating protective film 13 are a combination of one or more of PI film, insulating tape, protective film or hot pressing support film.

[0042] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cell data acquisition circuit connection assembly for a hybrid battery module, characterized in that: include: A main circuit board (1), the main circuit board (1) comprising an insulating fixed film (11) and a circuit layer (12), the circuit layer (12) comprising a metal conductor (121), the metal conductor (121) being relatively fixedly attached to the surface of the insulating fixed film (11), the metal conductor (121) comprising a first signal output terminal (121a) and a first signal input terminal (121b); A plurality of branch circuit boards (2), wherein the branch circuit boards (2) are PCB boards or FPC boards, and an etching circuit (21) is provided on the PCB board or FPC board, wherein the etching circuit (21) comprises a second signal output end (21a) and a second signal input end (21b), and the second signal output end (21a) is electrically connected to the first signal input end (121b).

2. The cell data acquisition circuit connection assembly of a hybrid battery module according to claim 1, characterized in that: One side of the branch circuit board (2) is provided with a first connecting portion (22) and a second connecting portion (23) connected to the main circuit board (1); a gap area (24) is provided between the first connecting portion (22) and the second connecting portion (23); and the second signal input end (21b) is provided on the second connecting portion (23).

3. The cell data acquisition circuit connection assembly of a hybrid battery module according to claim 2, characterized in that: The width of the first connecting portion (22) is smaller than the width of the second connecting portion (23).

4. The cell data acquisition circuit connection assembly of a hybrid battery module according to claim 1, characterized in that: A fuse circuit (3) is provided on the branch circuit board (2).

5. The cell data acquisition circuit connection assembly of a hybrid battery module according to claim 1, characterized in that: The first signal output end (121a) is connected to a connector module (4), the connector module (4) being arranged on one side of the main circuit board (1), the connector module (4) comprising a PCB board or an FPC board and components thereon.

6. The cell data acquisition circuit connection assembly of a hybrid battery module according to claim 1, characterized in that: The metal conductor (121) is made of one or more combinations of conductive metal wires, metal conductive narrow strips, and metal films.

7. The cell data acquisition circuit connection assembly of a hybrid battery module according to claim 1, characterized in that: The circuit layer (12) is also covered with an insulating protective film (13), and the insulating protective film (13) and the insulating fixing film (11) are connected to each other to fully cover the periphery of the metal conductor (121).

8. The cell data acquisition circuit connection assembly of a hybrid battery module according to claim 7, characterized in that: The insulating fixing film (11) and the insulating protective film (13) are a combination of one or more of a PI film, an insulating tape, a protective film or a hot pressing support film.

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