CCS assembly for multi-cell module of power battery

Abstract

The utility model relates to the technical field of battery packs, in particular to a CCS assembly for a multi-cell module of a power battery, which comprises a wire harness isolation plate, parallel cell module butt joint parts are arranged on the wire harness isolation plate, a plurality of CCS assembly mounting positions are arranged on one side of each cell module butt joint part, and an integrated busbar CCS assembly is mounted on each CCS assembly mounting position; adjacent integrated busbar CCS assemblies are connected in series through module series aluminum bars. A flexible circuit board mounting position and an aluminum bar mounting position are arranged on the CCS assembly mounting position; the integrated busbar CCS assembly comprises a flexible circuit board arranged on the flexible circuit board installation position and a plurality of aluminum bars arranged on the aluminum bar installation position, the flexible circuit board is connected with the aluminum bars through nickel sheets, and one end of the flexible circuit board is provided with a connector. According to the CCS assembly, copper bars can be saved, the weight and space of the whole pack are reduced, the energy density of the battery pack is improved, the number of molds can be reduced through integral forming, and the automation degree of battery pack assembling can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a CCS component for a multi-cell module of a power battery. 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 typically consist of multiple cell modules connected in series. This involves stacking multiple modules horizontally within a box and then connecting them in series. The core cell module typically has a specific number of cells configured based on the required output voltage. All cells are then connected via copper busbars for voltage output.

[0004] In a power battery cell module, the positive and negative poles of the power battery cells are arranged upward and symmetrically on the surface of the cell. A wiring harness is often 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: Integrate 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] Traditionally, a single power battery cell module often uses an independent integrated busbar CCS assembly for electrical connection to collect cell information. Multiple power battery cell modules are electrically connected using multiple independent integrated busbar CCS assemblies. Each integrated busbar CCS is then plugged into an external battery management system to collect and transmit data. Because the power battery cell modules also need to be connected in series, the copper busbars and integrated busbar CCSs inevitably take up a significant amount of space in the battery pack and are complex to install, failing to improve the assembly efficiency of multiple power battery cell modules.

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

[0010] The purpose of the present utility model is to overcome the problems of the above-mentioned prior art and provide a CCS assembly for a multi-cell module of a power battery, which is used to solve the technical problems that the traditional line uses independent CCS assemblies to connect the multi-cell modules respectively and then connect them in series, which not only occupies a large space in the power battery, but also relies heavily on manual labor during electrical connection, is cumbersome to operate, and cannot improve the assembly efficiency of the power battery.

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

[0012] A CCS assembly for a multi-cell module of a power battery, comprising a wiring harness isolation plate, wherein parallel cell module docking parts are provided on the wiring harness isolation plate, wherein one side of the cell module docking part is used to fit the cell module, and the other side is provided with a plurality of CCS assembly mounting positions, wherein an integrated busbar CCS assembly is mounted on the CCS assembly mounting position; adjacent integrated busbar CCS assemblies are connected in series via module series aluminum bars; a flexible circuit board mounting position is provided on the CCS assembly mounting position, and aluminum bar mounting positions symmetrically arranged on both sides of the flexible circuit board mounting position; the integrated busbar CCS assembly comprises a flexible circuit board arranged on the flexible circuit board mounting position, and a plurality of aluminum bars arranged on the aluminum bar mounting position, wherein the flexible circuit board and the aluminum bar are connected via a nickel sheet, and a connector is provided at one end of the flexible circuit board.

[0013] Furthermore, adjacent CCS assembly installation positions are isolated by barriers.

[0014] Furthermore, a module series aluminum bar embedding groove for embedding the module series aluminum bar is provided at the end of the partition.

[0015] Furthermore, the module series aluminum bar embedding groove includes a support platform, and series aluminum bar grooves symmetrically arranged on both sides of the support platform; the module series aluminum bar includes a series aluminum bar connecting part that can extend into the series aluminum bar groove, and a series aluminum bar protrusion that can be supported by the support platform.

[0016] Furthermore, a plurality of aluminum bar embedding grooves for installing the aluminum bar are provided at equal intervals on the aluminum bar installation position; and a flexible circuit board embedding groove for installing the flexible circuit board is provided on the flexible circuit board installation position.

[0017] 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;

[0018] Furthermore, the nickel sheet is welded to the left aluminum bar or the right aluminum bar.

[0019] Furthermore, the connectors on the flexible circuit boards in each of the integrated busbar CCS assemblies are all located at the same end.

[0020] Furthermore, the wiring harness isolation plate is made of insulating material.

[0021] Furthermore, a cover plate is provided on the top of the wiring harness isolation plate.

[0022] The utility model provides a CCS assembly for a multi-cell module of a power battery, which achieves the fixation of multiple horizontally stacked cell modules through a wire harness isolation plate, and provides a cell module mounting portion corresponding to the number of cell modules on the wire harness isolation plate, and an aluminum bar and a flexible circuit board for electrically connecting to the positive and negative poles of a single cell are provided on the cell module mounting portion, and adjacent integrated busbar CCS assemblies are connected in series via a module series aluminum bar provided at the end. This CCS assembly can save copper bars, thereby reducing the weight and space of the entire package, and improving the energy density of the battery pack, and the one-piece molding can reduce the number of molds. Because the installation of the CCS assembly is mainly through welding, the structure can be completed automatically, which not only improves the degree of automation of the battery pack assembly, but also avoids the risks that may be caused by manual labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a CCS assembly for a multi-cell module of a power battery according to the present invention;

[0024] Figure 2 This is an exploded view of a CCS assembly for a multi-cell module of a power battery according to the present invention;

[0025] Figure 3 This is a schematic structural diagram of a wiring harness isolation plate in a CCS assembly for a multi-cell module of a power battery described in the present invention.

[0026] Graphic mark:

[0027] 1-wire harness isolation plate, 101-cell module docking part, 102-CCS assembly installation position, 103-flexible circuit board installation position, 104-aluminum bar installation position, 105-blocking, 106-module series aluminum bar embedding groove, 107-support platform, 108-series aluminum bar through groove, 109-aluminum bar embedding groove, 110-flexible circuit board embedding groove, 111-left aluminum bar through groove, 112-right aluminum bar through groove, 113-buffer slot support plate;

[0028] 2-Integrated busbar CCS assembly, 201-Flexible circuit board, 202-Aluminum bar, 203-Nickel sheet, 204-Connector, 205-Left aluminum bar, 206-Right aluminum bar, 207-Bending buffer slot;

[0029] 3-module series aluminum bar, 301-series aluminum bar connecting part, 302-series aluminum bar protrusion. DETAILED DESCRIPTION

[0030] 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.

[0031] like Figures 1 to 3 As shown, this solution provides a CCS assembly for a multi-cell module of a power battery, including a wiring harness isolation plate 1, on which are provided mutually parallel cell module docking portions 101, one side of which is used to attach the cell module, and the other side of which is provided with a plurality of CCS assembly mounting positions 102, on which the integrated busbar CCS assembly 2 is mounted;

[0032] Adjacent integrated busbar CCS components 2 are connected in series via module series aluminum bars 3;

[0033] The CCS assembly mounting position 102 is provided with a flexible circuit board mounting position 103 and aluminum bar mounting positions 104 symmetrically arranged on both sides of the flexible circuit board mounting position 103;

[0034] The integrated busbar CCS assembly 2 includes a flexible circuit board 201 arranged on the flexible circuit board mounting position 103, and a plurality of aluminum bars 202 arranged on the aluminum bar mounting position 104. The flexible circuit board 201 and the aluminum bars 202 are connected by a nickel sheet 203, and a connector 204 is provided at one end of the flexible circuit board 201.

[0035] The harness isolation plate 1 in this embodiment is used to be arranged on the top of a plurality of horizontally stacked battery modules, and the top of each battery module has symmetrically arranged positive and negative electrode connection terminals.

[0036] By setting the cell module docking part 101 and the wiring harness isolation plate 1 corresponding to the number of cell modules at the top, the installation position of the integrated busbar CCS component 2 in each cell module docking part 101 can correspond to the top of the cell module, thereby achieving the purpose of connecting the aluminum bar 202 to the positive and negative poles of the single cell corresponding to the position in each cell module, and collecting the voltage or current data of each cell through the flexible circuit board 201 through the nickel sheet 203, and finally connecting with the external battery management system through the connector 204 to realize data collection and transmission.

[0037] It should be noted that the specific circuit structure of the flexible circuit board 201 involved in this solution adopts the well-known technology in the field, so it will not be 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.

[0038] It should be noted that, in this embodiment, adjacent CCS assembly installation positions 102 are isolated by a partition 105 , and the partition 105 can separate two adjacent CCS assembly installation positions 102 , thereby ensuring that the integrated busbar CCS assemblies 2 are installed independently without affecting each other.

[0039] A module series connection aluminum bar embedding groove 106 for embedding the module series connection aluminum bar 3 is provided at the end of the partition 105. The module series connection aluminum bar 3 is used to connect two adjacent integrated busbar CCS components 2 in series, thereby indirectly connecting two adjacent battery cell modules in series.

[0040] In this embodiment, the module series aluminum bar embedded groove 106 includes a support platform 107 and series aluminum bar grooves 108 symmetrically arranged on both sides of the support platform 107;

[0041] The module series aluminum bar 3 includes a series aluminum bar connecting portion 301 that can extend into the series aluminum bar groove 108, and a series aluminum bar protrusion 302 that can be supported by the support platform 107.

[0042] Specifically, when the wiring harness isolation plate 1 acts on the horizontally stacked battery cell module, the two series aluminum bar connecting parts 301 can respectively act on the electrical connection ends of the single battery cells placed at the two series aluminum bar grooves 108, and the electrical connection can be reinforced by screws or welding, while the series aluminum bar protrusion 302 is balanced and supported by the support platform 107.

[0043] like Figure 1 and Figure 2 As shown, in this embodiment, a plurality of aluminum bar embedding grooves 109 for installing the aluminum bar 202 are opened at equal intervals on the aluminum bar installation position 104; a flexible circuit board embedding groove 110 for installing the flexible circuit board 201 is opened on the flexible circuit board installation position 103.

[0044] Specifically, the aluminum bar embedding groove 109 is used to limit the positive and negative connection ends of the aluminum bar 202 and its corresponding single battery cell, which is convenient for precise connection; the flexible circuit board embedding groove 110 is used to limit and support the flexible circuit board 201, so that it is firmly fixed on the wiring harness isolation plate 1, and can be better electrically connected to each aluminum bar 202 through the nickel sheet 203.

[0045] The aluminum bar 202 includes a left aluminum bar 205 and a right aluminum bar 206 that are symmetrically arranged, and a bending buffer groove 207 is provided between the left aluminum bar 205 and the right aluminum bar 206;

[0046] The aluminum bar embedding groove 109 includes a left aluminum bar groove 111 and a right aluminum bar groove 112, and a buffer groove support plate 113 is provided between the left aluminum bar groove 111 and the right aluminum bar groove 112;

[0047] When the aluminum bar 202 is installed with the aluminum bar embedding groove 109, the curved buffer groove 207 is directly aligned and falls on the buffer groove support plate 113, so that the aluminum bar 202 can be quickly assembled;

[0048] At this time, the left aluminum bar 205 corresponds to the left aluminum bar groove 111, and the right aluminum bar 206 corresponds to the right aluminum bar groove 112.

[0049] When assembled with the battery cell module, the left aluminum bar groove 111 and the right aluminum bar groove 112 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 202.

[0050] In this embodiment, the nickel sheet 203 is welded to the left aluminum bar 205 or the right aluminum bar 206 .

[0051] Specifically, due to the curved buffer groove, the height of its corresponding part is higher than the height of the left aluminum bar 205 and the right aluminum bar 206 which are horizontal to each other. The left aluminum bar 205 or the right aluminum bar 260 is mainly used to connect with the electrodes of the battery cell. It has a flat surface, and welding the nickel sheet 203 to its surface is not likely to cause breakage at the welding point between the nickel sheet 203 and the aluminum bar 202 during use.

[0052] As an optimization of this solution, the connectors 204 on the flexible circuit boards 201 in each integrated busbar CCS assembly 2 are located at the same end. This structure facilitates the connection of each flexible circuit board 201 to the external battery management system through the smallest possible path, reduces internal wiring in the battery pack, and simplifies space.

[0053] In this embodiment, the wiring harness isolation plate 1 is made of insulating material, such as plastic.

[0054] As a further optimization of this solution, a cover plate (not marked in the figure) is also provided on the top of the wiring harness isolation plate 1. Through the cover plate, the integrated busbar CCS component 2 can be firmly confined to the CCS component installation position 102, thereby ensuring accurate monitoring of the battery cell module.

[0055] 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 CCS assembly for a multi-cell module of a power battery, characterized in that: The invention comprises a wiring harness isolation plate (1), wherein the wiring harness isolation plate (1) is provided with mutually parallel battery cell module docking portions (101), one side of the battery cell module docking portion (101) is used for attaching the battery cell module, and the other side is provided with a plurality of CCS component mounting positions (102), and the CCS component mounting positions (102) are provided with integrated busbar CCS components (2); Adjacent integrated busbar CCS components (2) are connected in series via module series aluminum bars (3); The CCS component mounting position (102) is provided with a flexible circuit board mounting position (103), and aluminum bar mounting positions (104) symmetrically arranged on both sides of the flexible circuit board mounting position (103); The integrated busbar CCS assembly (2) comprises a flexible circuit board (201) arranged on the flexible circuit board mounting position (103), and a plurality of aluminum bars (202) arranged on the aluminum bar mounting position (104), wherein the flexible circuit board (201) and the aluminum bars (202) are connected via a nickel sheet (203), and a connector (204) is provided at one end of the flexible circuit board (201).

2. A CCS assembly for a multi-cell module of a power battery according to claim 1, characterized in that: Adjacent CCS component installation positions (102) are isolated by barriers (105).

3. A CCS assembly for a multi-cell module of a power battery according to claim 2, characterized in that: A module series aluminum bar embedding groove (106) for embedding the module series aluminum bar (3) is provided at the end of the baffle (105).

4. A CCS assembly for a multi-cell module of a power battery according to claim 3, characterized in that: The module series aluminum bar embedded groove (106) includes a support platform (107) and series aluminum bar grooves (108) symmetrically arranged on both sides of the support platform (107); The module series aluminum bar (3) includes a series aluminum bar connecting portion (301) capable of extending into the series aluminum bar slot (108), and a series aluminum bar protrusion (302) capable of being supported by the support platform (107).

5. The CCS assembly for a multi-cell module of a power battery according to claim 1, characterized in that: A plurality of aluminum bar embedding grooves (109) for mounting the aluminum bar (202) are provided at equal intervals on the aluminum bar mounting position (104); and a flexible circuit board embedding groove (110) for mounting the flexible circuit board (201) is provided on the flexible circuit board mounting position (103).

6. The CCS assembly for a multi-cell module of a power battery according to claim 5, characterized in that: The aluminum bar (202) comprises a symmetrically arranged left aluminum bar (205) and a right aluminum bar (206), and a bending buffer groove (207) is provided between the left aluminum bar (205) and the right aluminum bar (206); The aluminum bar embedding groove (109) comprises a left aluminum bar groove (111) and a right aluminum bar groove (112), and a buffer groove support plate (113) is provided between the left aluminum bar groove (111) and the right aluminum bar groove (112).

7. The CCS assembly for a multi-cell module of a power battery according to claim 6, characterized in that: The nickel sheet (203) is welded to the left aluminum bar (205) or the right aluminum bar (206).

8. The CCS assembly for a multi-cell module of a power battery according to claim 1, characterized in that: The connectors (204) on the flexible circuit boards (201) in each integrated busbar CCS assembly (2) are all located at the same end.

9. The CCS assembly for a multi-cell module of a power battery according to claim 1, characterized in that: The wiring harness isolation plate (1) is made of insulating material.

10. The CCS assembly for a multi-cell module of a power battery according to claim 1, characterized in that: A cover plate is also provided on the top of the wiring harness isolation plate (1).

Images