Integrated collection busbar, battery module, battery pack and electrical equipment

Abstract

The present disclosure provides an integrated collecting busbar, a battery module, a battery pack and a power utilization device. The integrated collecting busbar comprises a first circuit board (1), a second circuit board (2), a first signal connector (3) arranged at a first end of the first circuit board (1), and a second signal connector (4) arranged at a first end of the second circuit board (2). The length of the second circuit board (2) is less than that of the first circuit board (1). The second circuit board (2) extends along the length direction of the first circuit board (1) and covers the first circuit board (1). The second signal connector (4) and the first signal connector (3) are staggered along the length direction. Through the above technical solution, on the one hand, the signal connector can have a larger width, and on the other hand, the circuit board can have a smaller width, further reducing the possibility of the circuit board covering the explosion-proof valve.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and in particular to an integrated acquisition busbar for a battery module, as well as a battery module, a battery pack, and electrical equipment. Background Technology

[0002] The Integrated Data Acquisition Busbar (CCS) is a highly integrated battery signal acquisition (such as temperature acquisition, pressure acquisition, etc.) and management system, which includes FPC (flexible printed circuit board), connectors, pads, brackets and other structures.

[0003] In related technologies, the FPC structure suffers from the defect of unreasonable layout of various components. Utility Model Content

[0004] One of the technical problems that this disclosure aims to solve is the unreasonable arrangement of terminals on the circuit board.

[0005] To address the aforementioned technical problems, this disclosure provides an integrated acquisition busbar, comprising a first circuit board, a second circuit board, a first signal connector disposed at a first end of the first circuit board, and a second signal connector disposed at a first end of the second circuit board. The length of the second circuit board is less than that of the first circuit board, the second circuit board extends along the length direction of the first circuit board and covers the first circuit board, and the second signal connector and the first signal connector are offset along the length direction.

[0006] In some embodiments, the first circuit board and the second circuit board have the same width, the width of the first signal connector is 0.5-1 times the width of the first circuit board, and the width of the second signal connector is 0.5-1 times the width of the second circuit board; the first end of the first circuit board and the first end of the second circuit board are the same end.

[0007] In some embodiments, the first signal connector is provided with pins and / or sockets, the second signal connector is provided with pins and / or sockets, the first signal connector and / or the second signal connector are asymmetrical structures to form a foolproof interface; the first circuit board and / or the second circuit board are flexible circuit boards.

[0008] In some embodiments, the flexible circuit board includes a substrate layer, an adhesive layer, a circuit layer, and a protective layer stacked sequentially.

[0009] In some embodiments, the thickness of the substrate layer is 20-30 μm; the thickness of the adhesive layer is 15-25 μm; the thickness of the circuit layer is 30-40 μm; and the thickness of the protective layer is 50-70 μm.

[0010] In some embodiments, the system further includes a first connecting piece connected to the first circuit board and a second connecting piece connected to the second circuit board. The first connecting piece extends along the width direction of the first circuit board, and the second connecting piece extends along the width direction of the second circuit board. The first connecting piece is disposed on the portion of the first circuit board that does not cover the second circuit board.

[0011] In some embodiments, the device further includes a bracket and a plurality of tabs disposed on the bracket for connecting battery cells. The first circuit board and the second circuit board are disposed on the bracket, and the first connecting tab and the second connecting tab are respectively connected to different tabs. A first end of the first circuit board extends outside the bracket, and a mounting position for accommodating the first signal connector is formed on the first end outside the bracket. The first end of the second circuit board does not extend outside the bracket.

[0012] In addition, this disclosure also provides a battery module, which includes multiple battery cells and more than one integrated acquisition busbar.

[0013] In addition, this disclosure also provides a battery pack, which includes the above-mentioned battery module.

[0014] In addition, this disclosure also provides an electrical device, which includes the above-mentioned battery pack.

[0015] With the above technical solution, the two signal connectors are staggered along the length of the circuit board, which reduces the width restriction of the signal connectors. Each circuit board has enough space to accommodate the signal connectors. On the one hand, it allows the signal connectors to have a larger width, and on the other hand, it allows the circuit board to have a smaller width, further reducing the possibility of the circuit board covering the explosion-proof valve. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of two circuit boards disclosed in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the integrated data acquisition busbar disclosed in this embodiment; Figure 3 This is a schematic diagram of the circuit board structure disclosed in an embodiment of this disclosure.

[0018] Explanation of reference numerals in the attached figures: 1. First circuit board; 2. Second circuit board; 3. First signal connector; 4. Second signal connector; 5. First connecting piece; 6. Second connecting piece; 7. Bracket; 8. Bar plate; 9. Substrate layer; 10. Adhesive layer; 11. Circuit layer; 12. Protective layer. Detailed Implementation

[0019] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0020] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0021] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0023] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0024] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0026] refer to Figures 1-3 As shown, this disclosure provides an integrated data acquisition busbar, comprising a first circuit board 1, a second circuit board 2, a first signal connector 3 disposed at a first end of the first circuit board 1, and a second signal connector 4 disposed at a first end of the second circuit board 2. The length of the second circuit board 2 is less than that of the first circuit board 1. The second circuit board 2 extends along the length direction of the first circuit board 1 and covers the first circuit board 1. The second signal connector 4 and the first signal connector 3 are offset along the length direction. In some embodiments, the first circuit board 1 and the second circuit board 2 may be strip-shaped structures.

[0027] The inventors of this disclosure have discovered that when signal connectors (or terminals) on two circuit boards are arranged in the width direction of the circuit boards, the space for signal connectors is small due to the small width of the circuit boards, which makes it inconvenient to arrange the signal connectors. In particular, it does not allow the signal connectors to have a large width, which imposes many restrictions on the signal connectors. It can be seen that the arrangement of the signal connectors is not reasonable.

[0028] In this disclosure, the two signal connectors are staggered along the length of the circuit board, which reduces the width restriction on the signal connectors. Each circuit board has sufficient space to accommodate the signal connectors, which allows the signal connectors to have a larger width on the one hand, and the circuit board to have a smaller width on the other hand, further reducing the possibility of the circuit board covering the explosion-proof valve.

[0029] In addition, the segmented design of the first circuit board 1 and the second circuit board 2 can obtain more sampling points, support the design of two temperature modules detecting one battery, simplify the FPC circuit wiring, and make it simple and reliable.

[0030] The first circuit board 1 and the second circuit board 2 are formed into a long rectangular shape, with the length of the second circuit board 2 being less than the length of the first circuit board 1. The second circuit board 2 is entirely located on the first circuit board 1. The first end of the second circuit board 2 is positioned close to the first end of the first circuit board 1, and the first end of the second circuit board 2 is offset from the first end of the first circuit board 1, so that the second signal connector 4 and the first signal connector 3 are offset along the length of the first circuit board 1. Therefore, the two signal connectors no longer occupy a larger width, allowing the circuit board to have a smaller width.

[0031] In some embodiments, the first circuit board 1 and the second circuit board 2 have the same width, the width of the first signal connector 3 is 0.5-1 times the width of the first circuit board 1, and the width of the second signal connector 4 is 0.5-1 times the width of the second circuit board 2; the first end of the first circuit board 1 and the first end of the second circuit board 2 are the same end. As described above, since the signal connectors are offset along the length of the circuit board, the signal connectors can have a larger width, while the circuit board can have a smaller width. That is, the width of the signal connector can be made as close as possible to the width of the circuit board, for example, 0.5-1 times the width of the circuit board. Increasing the width of the signal connector can also reduce its thickness, facilitating installation. In addition, the first ends of the first circuit board 1 and the first ends of the second circuit board 2 are both at the same end of the integrated acquisition busbar, and the first signal connector 3 and the second signal connector 4 are close to each other, facilitating connection with other connectors.

[0032] In some embodiments, the first signal connector 3 is provided with pins and / or sockets, and the second signal connector 4 is provided with pins and / or sockets. The first signal connector 3 and / or the second signal connector 4 are asymmetrical structures to form a foolproof interface. The signal connectors can use a connection method of pins, sockets, or a combination of pins and sockets. The interface of the signal connector can be set as an asymmetrical structure, for example, a non-axially symmetric, non-central axis structure about the center line along the length direction of the circuit board. That is, the interface of the signal connector is designed as a foolproof interface to avoid incorrect insertion.

[0033] In some embodiments, the first circuit board 1 and / or the second circuit board 2 are flexible circuit boards. Both the first circuit board 1 and the second circuit board 2 can be configured as flexible circuit boards for easy installation.

[0034] In some embodiments, reference Figure 3 As shown, the flexible circuit board includes a substrate layer 9, an adhesive layer 10, a circuit layer 11, and a protective layer 12 stacked sequentially. The substrate layer 9 can be made of polyimide (PI), the adhesive layer 10 can be made of an adhesive, such as PVC (polyvinyl chloride), the circuit layer 11 can be made of copper or other conductive materials, and the protective layer 12 can be made of the PI layer and an adhesive, with the adhesive used to bond the PI layer to the circuit layer.

[0035] In some embodiments, the thickness of the substrate layer 9 is 20-30 μm; the thickness of the adhesive layer 10 is 15-25 μm; the thickness of the circuit layer 11 is 30-40 μm; and the thickness of the protective layer 12 is 50-70 μm. By rationally arranging the thicknesses of the four layers, the flexible circuit board's properties, such as flexibility, are improved. Furthermore, the protective layer 12 can be made of a PI layer and an adhesive, with thicknesses of 20-30 μm and 30-40 μm, respectively.

[0036] In some embodiments, the integrated acquisition busbar further includes a first connecting piece 5 connected to the first circuit board 1 and a second connecting piece 6 connected to the second circuit board 2. The first connecting piece 5 extends along the width direction of the first circuit board 1, and the second connecting piece 6 extends along the width direction of the second circuit board 2. The first connecting piece 5 is disposed on the portion of the first circuit board 1 that does not cover the second circuit board 2. The first connecting piece 5 is electrically connected to the first circuit board 1 and can be electrically connected to the battery cell to transmit electrical signals. Similarly, the second connecting piece 6 is electrically connected to the second circuit board 2 and can be electrically connected to the battery cell to transmit electrical signals. In particular, the first circuit board 1 is roughly divided into two sections along its length. One section is covered by the second circuit board 2 and does not have the first connecting piece 5 disposed thereon. The other section does not cover the second circuit board 2 and has the first connecting piece 5 disposed thereon. This allows the electrical signals of the battery cells in different regions along the length direction to be acquired through the first circuit board 1 and the second circuit board 2, respectively.

[0037] The integrated acquisition busbar also includes a bracket 7 and multiple connectors 8 for connecting battery cells, mounted on the bracket 7. The first circuit board 1 and the second circuit board 2 are mounted on the bracket 7, and the first connecting piece 5 and the second connecting piece 6 are respectively connected to different connectors 8. The bracket 7 serves as a supporting foundation for the first circuit board 1, the second circuit board 2, the first connecting piece 5, the second connecting piece 6, and the connectors 8, ensuring that these components are in a relatively stable position. The first circuit board 1 is connected to the corresponding connector 8 via the first connecting piece 5, and then connected to the corresponding battery cell via the connector 8, enabling signal acquisition from a battery cell at a specific location. The second circuit board 2 is connected to the corresponding connector 8 via the second connecting piece 6, and then connected to the corresponding battery cell via the connector 8, also enabling signal acquisition from a battery cell at a specific location.

[0038] In some embodiments, the first end of the first circuit board 1 extends beyond the bracket 7, and a mounting position for accommodating the first signal connector 3 is formed on the first end outside the bracket 7; the first end of the second circuit board 2 does not extend beyond the bracket 7. (See reference...) Figure 2 As shown, the overall length of the first circuit board 1 is greater than the length of the bracket 7. Its first end extends outside the bracket 7, and its second end is located within the bracket 7. The first signal connector 3 is located on the portion of the first circuit board 1 that extends outside the bracket 7. In addition, the first end of the second circuit board 2 does not extend outside the bracket 7, and the second signal connector 4 can be indirectly supported by the bracket 7. The edge of the first end of the second circuit board 2 can be aligned with the edge of the bracket 7.

[0039] In some embodiments, through holes are formed on the first circuit board 1 and the second circuit board 2, respectively. These through holes can be aligned with the explosion-proof valve of the battery cell to avoid obstructing the explosion-proof valve. The through holes on the second circuit board 2 are aligned with some of the through holes on the first circuit board 1.

[0040] On the other hand, this disclosure also provides a battery module, which includes multiple battery cells and an integrated acquisition busbar according to the above scheme. The battery cells are arranged in a specific direction, and the length direction of the first circuit board 1 and the second circuit board 2 corresponds to the arrangement direction of the battery cells and is disposed on top of the battery cells.

[0041] On the other hand, this disclosure also provides a battery pack, which includes the battery modules described above. The battery pack may include multiple battery modules.

[0042] Furthermore, this disclosure also provides an electrical device that includes the battery pack described above. The electrical device may specifically be an energy storage device, a new energy vehicle, etc., and is not specifically limited thereto.

[0043] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0044] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. An integrated data acquisition busbar, characterized in that, It includes a first circuit board (1), a second circuit board (2), a first signal connector (3) disposed at a first end of the first circuit board (1), and a second signal connector (4) disposed at a first end of the second circuit board (2). The length of the second circuit board (2) is less than that of the first circuit board (1). The second circuit board (2) extends along the length direction of the first circuit board (1) and covers the first circuit board (1). The second signal connector (4) and the first signal connector (3) are offset along the length direction.

2. The integrated acquisition busbar according to claim 1, characterized in that, The width of the first circuit board (1) and the second circuit board (2) are the same, the width of the first signal connector (3) is 0.5-1 times the width of the first circuit board (1), and the width of the second signal connector (4) is 0.5-1 times the width of the second circuit board (2); The first end of the first circuit board (1) and the first end of the second circuit board (2) are the same end.

3. The integrated acquisition busbar according to claim 1, characterized in that, The first signal connector (3) is provided with pins and / or sockets, and the second signal connector (4) is provided with pins and / or sockets. The first signal connector (3) and / or the second signal connector (4) are asymmetrical structures to form a foolproof interface. The first circuit board (1) and / or the second circuit board (2) are flexible circuit boards.

4. The integrated acquisition busbar according to claim 3, characterized in that, The flexible circuit board includes a substrate layer (9), an adhesive layer (10), a circuit layer (11), and a protective layer (12) stacked in sequence.

5. The integrated acquisition busbar according to claim 4, characterized in that, The thickness of the substrate layer (9) is 20-30 μm; The thickness of the adhesive layer (10) is 15-25 μm; The thickness of the circuit layer (11) is 30-40 μm; The thickness of the protective layer (12) is 50-70 μm.

6. The integrated acquisition busbar according to claim 1, characterized in that, It also includes a first connecting piece (5) connected to the first circuit board (1) and a second connecting piece (6) connected to the second circuit board (2). The first connecting piece (5) extends along the width direction of the first circuit board (1), and the second connecting piece (6) extends along the width direction of the second circuit board (2). The first connecting piece (5) is disposed on the part of the first circuit board (1) that does not cover the second circuit board (2).

7. The integrated acquisition busbar according to claim 6, characterized in that, It also includes a bracket (7) and a plurality of tabs (8) for connecting the battery cells disposed on the bracket (7), the first circuit board (1) and the second circuit board (2) are disposed on the bracket (7), and the first connecting piece (5) and the second connecting piece (6) are respectively connected to different tabs (8). The first end of the first circuit board (1) extends outside the bracket (7) and a mounting position for mounting the first signal connector (3) is formed on the first end outside the bracket (7); the first end of the second circuit board (2) does not extend outside the bracket (7).

8. A battery module, characterized in that, It includes multiple battery cells and an integrated acquisition busbar according to any one of claims 1-7.

9. A battery pack, characterized in that, Includes the battery module as described in claim 8.

10. An electrical appliance, characterized in that, Includes the battery pack as described in claim 9.

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