Multi-connector CCS assembly suitable for limited space structure of battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a multi-connector CCS assembly suitable for a limited space structure of a battery pack, which comprises a wire harness isolation plate, one side of the wire harness isolation plate is used as a battery cell binding surface, and the other side of the wire harness isolation plate is used as a component mounting surface. The component mounting surface is provided with an aluminum bar mounting position and a flexible circuit board mounting position which are parallel to each other, the aluminum bar mounting position is provided with a plurality of aluminum bars, the flexible circuit board mounting position is provided with at least two flexible circuit boards, and one end of each flexible circuit board is provided with a connector; one side, adjacent to the aluminum bar mounting position, of each flexible circuit board is provided with nickel sheets of which the number corresponds to that of the aluminum bars, and the nickel sheets are used for being connected with the aluminum bars; the flexible circuit boards are arranged end to end, and the connectors are connected with an external battery management system in an inserted mode. The device is simple in structure, connectors can be arranged according to different schemes, the wire harness length is optimized and shortened, the occupied space can be saved, and the space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a multi-connector CCS assembly suitable for a battery pack with a limited space structure. Background Art

[0002] New energy vehicles (NEVs) have garnered widespread attention from all sectors of society due to their excellent environmental performance. Expectations for these vehicles are constantly increasing. As a new energy vehicle, electric vehicles are also developing towards enhanced safety, high energy efficiency, and lightweight design. The primary factor determining an EV's range is its battery. Different battery specifications can be selected for different vehicle models to meet driving requirements.

[0003] Batteries used in electric vehicles are typically built into a battery pack consisting of multiple cell modules. This means that multiple modules are stacked together in a single box and then connected together. The core cell module typically has a specific number of cells configured based on the required output voltage, and all cells are then connected together for voltage output.

[0004] In blade battery cells, the positive and negative electrodes are arranged on both sides, and wiring harnesses are commonly used to collect voltage. However, traditional wiring harness collection requires multiple wiring harnesses, which not only takes up a lot of space in the battery pack, but also relies heavily on manual labor when making electrical connections, with a very low degree of automation. Therefore, the integrated busbar CCS assembly was developed, also known as the battery cover assembly, which is a key electrical connection structure in the battery module. Its main functions include:

[0005] High-voltage series and parallel connection of battery cells: Realize high-voltage series and parallel connection of battery cells in the battery module to ensure the normal operation of the battery system.

[0006] Information acquisition: Integrates signal acquisition components (such as FPC, FFC, etc.) to collect battery temperature, voltage and other information, providing important data support for BMS (battery management system).

[0007] Safety protection: It has an overcurrent fuse function, which can quickly cut off the current when an abnormality occurs in the battery system to prevent the fault from expanding.

[0008] Due to the limited space within the battery pack, the FPC (flexible printed circuit board) can sometimes be too wide, preventing conventional placement and impacting the design and installation of other components. If it's too short, the excess cells will need to be connected via wiring harnesses. This makes it impossible to ensure consistent data collection, affecting data collection and transmission results and preventing effective battery cell monitoring.

[0009] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content

[0010] This utility model aims to overcome the aforementioned problems of the prior art by providing a multi-connector CCS assembly suitable for the limited space of a battery pack. This solves the problem that, due to the limited space within the battery pack, flexible circuit boards may sometimes be too wide, making them difficult to place normally and impacting the design and installation of other components. Alternatively, if they are too short, the excess cells require additional wiring harnesses for connection. This can lead to inconsistencies in data collection and transmission, which in turn affects the results.

[0011] The above objectives are achieved through the following technical solutions:

[0012] A multi-connector CCS assembly suitable for a limited space structure of a battery pack, including a wire harness isolation plate, one side of the wire harness isolation plate serving as a cell bonding surface, and the other side serving as a component mounting surface, wherein the component mounting surface is provided with mutually parallel aluminum bar mounting positions and flexible circuit board mounting positions, wherein the aluminum bar mounting positions are provided with a plurality of aluminum bars, and the flexible circuit board mounting positions are provided with at least two flexible circuit boards, and a connector is provided at one end of each of the flexible circuit boards; a number of nickel sheets corresponding to the aluminum bars are provided on one side of each flexible circuit board adjacent to the aluminum bar mounting position, and the nickel sheets are used to connect to the aluminum bars; the flexible circuit boards are arranged end to end, and each of the connectors is respectively plugged into an external battery management system.

[0013] Furthermore, the flexible circuit board includes a flexible circuit board body and a connector electrical connection portion located at an end portion, and the flexible circuit board body is installed at the flexible circuit board installation position.

[0014] Furthermore, a cover plate is provided on the outer side of the component mounting surface, and the cover plate can limit the flexible circuit board and the aluminum bar to the flexible circuit board mounting position and the aluminum bar mounting position.

[0015] Furthermore, the cover plate includes a cover plate body and baffles arranged on both sides, and the two baffles can clamp both sides of the wire harness isolation plate.

[0016] Furthermore, the cover plate is provided with a reversing groove at a position corresponding to the connector for reversing the electrical connection portion of the connector.

[0017] Furthermore, the aluminum bar mounting position is provided with a plurality of aluminum bar embedding grooves, in which the aluminum bars are installed; the flexible circuit board mounting position is provided with a flexible circuit board embedding groove, in which the flexible circuit board is installed.

[0018] Furthermore, the aluminum bar includes a symmetrically arranged left aluminum bar and a right aluminum bar, and a curved buffer groove is provided between the left aluminum bar and the right aluminum bar; the aluminum bar embedding groove includes a left aluminum bar groove and a right aluminum bar groove, and a buffer groove support plate is provided between the left aluminum bar groove and the right aluminum bar groove.

[0019] Furthermore, the nickel sheet is welded to the left aluminum bar or the right aluminum bar.

[0020] Furthermore, a circuit board through groove is provided on the flexible circuit board at a position adjacent to the nickel sheet.

[0021] Furthermore, the wiring harness isolation plate is made of insulating material.

[0022] This utility model provides a multi-connector CCS assembly suitable for battery packs with limited space. By utilizing multiple flexible circuit boards and connectors to connect aluminum bars on the same row, and by plugging each of these connectors into an external battery management system, data collection and transmission are achieved. This effectively addresses the technical issues of a single flexible circuit board being too wide or too short in some cases due to the limited space within the battery pack. This device not only has a simple structure, but also allows for different connector layouts to optimize and shorten wiring harness lengths. It also reduces the space occupied by the assembly, saving space to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of a multi-connector CCS assembly suitable for a limited space structure of a battery pack according to the present invention;

[0024] Figure 2 This is a schematic diagram of the connection between a multi-connector CCS assembly and a cover plate suitable for a limited space structure of a battery pack according to the present invention;

[0025] Figure 3 This is a structural schematic diagram of a cover plate in a multi-connector CCS assembly suitable for a limited space structure of a battery pack according to the present invention;

[0026] Figure 4 This is a schematic structural diagram of a wiring harness isolation plate in a multi-connector CCS assembly suitable for a limited space structure of a battery pack as described in the present invention.

[0027] Graphic mark:

[0028] 1-wire harness isolation plate, 101-battery cell bonding surface, 102-component mounting surface, 103-aluminum bar mounting position, 104-flexible circuit board mounting position, 105-aluminum bar embedding groove, 106-flexible circuit board embedding groove, 107-left aluminum bar through groove, 108-right aluminum bar through groove, 109-buffer slot support plate;

[0029] 2-flexible circuit board, 201-flexible circuit board body, 202-connector electrical connection part, 203-circuit board slot;

[0030] 3-cover plate, 301-cover plate body, 302-baffle, 303-reversing groove;

[0031] 4- Connector;

[0032] 5-Nickel sheet;

[0033] 6-aluminum bar, 601-left aluminum bar, 602-right aluminum bar, 603-bend buffer groove. DETAILED DESCRIPTION

[0034] The present invention is further described below with reference to the accompanying drawings and examples. The described embodiments are only a portion of the embodiments of the present invention, and are not intended to be exhaustive. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0035] like Figure 1 and Figure 4 As shown, this solution provides a multi-connector CCS assembly suitable for a limited space structure of a battery pack, including a rectangular wiring harness isolation plate 1, one side of the wiring harness isolation plate 1 serving as a cell bonding surface 101, and the other side serving as a component mounting surface 102. The component mounting surface 102 is provided with mutually parallel aluminum bar mounting positions 103 and flexible circuit board mounting positions 104. The aluminum bar mounting positions 103 are mounted with a plurality of aluminum bars 6, and the flexible circuit board mounting positions 104 are mounted with at least two flexible circuit boards 2, each of which is provided with a connector 4 at one end; each of the flexible circuit boards 2 is provided with a nickel sheet 5 corresponding in number to the aluminum bars 6 on one side adjacent to the aluminum bar mounting position 103, and the nickel sheet 5 is used to connect to the aluminum bar 6;

[0036] The flexible circuit boards 2 are arranged end to end, and the connectors 4 are respectively connected to an external battery management system to realize data collection and transmission.

[0037] The wiring harness isolation plate 1 described in this embodiment is used to be arranged on one side of the battery module with the positive and negative connection ends, and electrically connects the individual battery cells through the aluminum bar 6. The flexible circuit boards 2 arranged end to end on the flexible circuit board mounting position 104 collect voltage or current data of each battery cell through their own nickel sheet 5, and finally connect to the external battery management system through each connector 4 to realize data collection and transmission.

[0038] This structure of the tube cover can solve the problem that the single flexible circuit board 2 cannot be placed normally due to its long width and affects the design and installation of other components; it also solves the problem that there are unconnected battery cell modules due to the short width of the single flexible circuit board 2, and the excess battery cell parts need to be connected through additional wiring harnesses, which affects the consistency of data transmission.

[0039] It should be noted that there is no uniform requirement for the length of the flexible circuit boards 2 involved in this solution. It only needs to meet the requirement that the length of the multiple flexible circuit boards 2 after arrangement can correspond to the aluminum bars 6 on the aluminum bar mounting positions 103. The specific circuit structure adopts the well-known technology in the field, so it is not described in detail. It is only used as a component to realize the connection with the battery cell, thereby saving space while realizing quick connection of the battery cell.

[0040] like Figure 1 As shown, the flexible circuit board 2 in this embodiment includes a flexible circuit board body 201 and a connector electrical connection portion 202 located at an end thereof. The flexible circuit board body 201 is installed in the flexible circuit board installation position 104 .

[0041] Among them, the height of the connector electrical connection portion 202 of the connector 4 corresponding to the flexible circuit board mounting position 104 is higher than the height of the corresponding flexible circuit body 201, and is placed on the outside of the flexible circuit board 2 at its adjacent position so that the connector 4 is exposed to the outside, which is convenient for plugging into an external battery management system.

[0042] like Figure 2 As shown, a cover plate 3 is further provided on the outer side of the component mounting surface 102 , and the cover plate 3 can limit the flexible circuit board 2 and the aluminum bar 6 to the flexible circuit board mounting position 104 and the aluminum bar mounting position 103 .

[0043] like Figure 3 As shown, the cover plate 3 includes a cover plate body 301 and baffles 302 arranged on both sides. The two baffles 302 can clamp the two sides of the wire harness isolation plate 1.

[0044] When the electrical connection part of the battery cell is facing upward, in this embodiment, the cover plate 3 only needs to be installed vertically downward to ensure that both sides of the wiring harness isolation plate 1 can be clamped to complete the fixed installation. At this time, the flexible circuit board 2, the aluminum bar 6 and the nickel sheet 5 are all limited to the component installation surface 102.

[0045] As an optimization of the cover plate 3 in this embodiment, the cover plate 3 is provided with a reversing groove 303 for reversing the electrical connection part 202 of the connector corresponding to the position of the connector 4. The reversing groove 303 is used to reverse the flexible circuit board 2 at the connection connector 4 so that it turns the connector 4 to the outer side of the cover plate 3 to facilitate the connection of the connector 4 with the external battery management system.

[0046] As a further illustration of this solution, the flexible circuit board 2 at the connector is bonded to the outer side surface of the cover plate 3 by double-sided tape.

[0047] In this embodiment, the cover plate 3 is made of insulating material, such as plastic, which can protect the component.

[0048] like Figure 4 As shown, in this embodiment, the aluminum bar mounting position 103 is provided with a plurality of aluminum bar embedding grooves 105, and the aluminum bar 6 is installed in the aluminum bar embedding grooves 105; the flexible circuit board mounting position 104 is provided with a flexible circuit board embedding groove 106, and the flexible circuit board 2 is installed in the flexible circuit board embedding grooves 106.

[0049] like Figure 1 As shown, the aluminum bar 6 includes a left aluminum bar 601 and a right aluminum bar 602 that are symmetrically arranged, and a bending buffer groove 603 is provided between the left aluminum bar 601 and the right aluminum bar 602;

[0050] The aluminum bar embedding groove 105 includes a left aluminum bar groove 107 and a right aluminum bar groove 108, and a buffer groove support plate 109 is provided between the left aluminum bar groove 107 and the right aluminum bar groove 108.

[0051] When the aluminum bar 6 is installed with the aluminum bar slot 105, the bent buffer slot 603 is directly aligned and falls on the buffer slot support plate 109, so that the aluminum bar 6 can be quickly assembled; at this time, the left aluminum bar 601 corresponds to the left aluminum bar slot 107, and the right aluminum bar 602 corresponds to the right aluminum bar slot 108.

[0052] When assembled with the battery cell module, the left aluminum bar groove 107 and the right aluminum bar groove 108 are both used for the insertion of the positive and negative connection terminals on the battery cell, thereby facilitating quick contact and connection with the aluminum bar 6.

[0053] In this embodiment, the nickel sheet 5 is welded to the left aluminum bar 601 or the right aluminum bar 602. Because the curved buffer groove 603 makes the corresponding portion higher than the horizontal left and right aluminum bars 601 and 602, the left and right aluminum bars 601 and 602 are primarily used for connecting to the battery cell electrodes and have a flat surface, welding the nickel sheet 5 to these surfaces is less likely to cause fracture at the weld between the nickel sheet 5 and the aluminum bar 6 during use.

[0054] As an optimization of this solution, a circuit board through groove 203 is opened on the flexible circuit board 2 near the nickel sheet 5. This structure can be torn after the battery cell expands, thereby preventing the nickel sheet 5 from being torn due to stress and causing failure of the integrated busbar.

[0055] It should be noted that the wiring harness isolation plate 1 in this embodiment is made of insulating materials such as plastic.

[0056] The above description is only for explaining the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, 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 multi-connector CCS assembly suitable for a limited space structure of a battery pack, characterized in that: The invention comprises a wiring harness isolation plate (1), one side of the wiring harness isolation plate (1) serves as a battery cell bonding surface (101), and the other side serves as a component mounting surface (102), wherein the component mounting surface (102) is provided with aluminum bar mounting positions (103) and flexible circuit board mounting positions (104) which are parallel to each other, wherein the aluminum bar mounting positions (103) are provided with a plurality of aluminum bars (6), and the flexible circuit board mounting positions (104) are provided with at least two flexible circuit boards (2), and a connector (4) is provided at one end of each flexible circuit board (2); and each flexible circuit board (2) is provided with a nickel sheet (5) having a number corresponding to the aluminum bars (6) on one side adjacent to the aluminum bar mounting position (103), and the nickel sheet (5) is used to connect with the aluminum bar (6); The flexible circuit boards (2) are arranged end to end, and the connectors (4) are respectively plugged into an external battery management system.

2. A multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 1, characterized in that: The flexible circuit board (2) comprises a flexible circuit board body (201) and a connector electrical connection portion (202) located at an end portion, and the flexible circuit board body (201) is installed at the flexible circuit board installation position (104).

3. A multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 2, characterized in that: A cover plate (3) is further provided on the outer side of the component mounting surface (102), and the cover plate (3) can limit the flexible circuit board (2) and the aluminum bar (6) to the flexible circuit board mounting position (104) and the aluminum bar mounting position (103).

4. A multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 3, characterized in that: The cover plate (3) comprises a cover plate body (301) and baffles (302) arranged on both sides, and the two baffles (302) can clamp both sides of the wire harness isolation plate (1).

5. A multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 3 or 4, characterized in that: A reversing groove (303) for reversing the electrical connection portion (202) of the connector is provided at a position of the cover plate (3) corresponding to the connector (4).

6. The multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 1, characterized in that: The aluminum bar mounting position (103) is provided with a plurality of aluminum bar embedding grooves (105), in which the aluminum bar (6) is installed; the flexible circuit board mounting position (104) is provided with flexible circuit board embedding grooves (106), in which the flexible circuit board (2) is installed.

7. A multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 6, characterized in that: The aluminum bar (6) comprises a symmetrically arranged left aluminum bar (601) and a right aluminum bar (602), and a bending buffer groove (603) is provided between the left aluminum bar (601) and the right aluminum bar (602); The aluminum bar embedding groove (105) includes a left aluminum bar groove (107) and a right aluminum bar groove (108), and a buffer groove support plate (109) is provided between the left aluminum bar groove (107) and the right aluminum bar groove (108).

8. The multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 7, characterized in that: The nickel sheet (5) is welded to the left aluminum bar (601) or the right aluminum bar (602).

9. The multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 1, characterized in that: A circuit board through slot (203) is provided on the flexible circuit board (2) at a position adjacent to the nickel sheet (5).

10. The multi-connector CCS assembly suitable for a limited space structure of a battery pack according to claim 1, characterized in that: The wiring harness isolation plate (1) is made of insulating material.

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