Battery pack and vehicle

Abstract

The present application relates to the technical field of batteries. Disclosed are a battery pack and a vehicle. The battery pack comprises a case, cell modules, a high-voltage box, a battery management system, an integrated busbar, and a main positive and main negative module, wherein the cell modules are mounted in the case, the integrated busbar comprises a high-voltage path and a low-voltage path, and the cell modules are each electrically connected to the high-voltage path and the low-voltage path; and the high-voltage path is electrically connected to the high-voltage box by means of the main positive and main negative module, and the low-voltage path is electrically connected to the high-voltage box by means of the battery management system.

Description

A battery pack and a vehicle

[0001] This application claims priority to Chinese Patent Application No. 202422611669.6, filed with the Chinese Patent Office on October 28, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a battery pack and a vehicle. Background Technology

[0003] In related technologies, automotive battery packs generally adopt the form of cell-module-PACK. This type of automotive battery pack has a relatively complex overall layout, with long wiring harnesses, requiring space for wiring and fixing points, and a large number of copper busbars. Invention Overview

[0004] The battery cell module requires a separate wiring harness to connect to the battery management system, which results in a large number of wiring harnesses being installed in the battery pack. This makes the overall structure of the battery pack complex, reduces volume utilization, and increases costs.

[0005] This application provides a battery pack and vehicle that can reduce the number of wiring harnesses and adapter copper busbars in the battery pack, reduce the number of parts, reduce structural complexity, and save space and cost.

[0006] In one aspect, some implementations of this application provide a battery pack including a housing, cell modules, a high-voltage box, a battery management system, an integrated busbar, and a main positive and main negative module. The cell modules are installed in the housing, and the integrated busbar includes a high-voltage path and a low-voltage path, with each cell module electrically connected to both the high-voltage path and the low-voltage path.

[0007] The high-voltage path is electrically connected to the high-voltage box through the main positive and main negative modules, while the low-voltage path is electrically connected to the high-voltage box through the battery management system.

[0008] Secondly, some implementations of this application provide a vehicle that includes a battery pack of the first aspect and any possible design thereof. Beneficial effects

[0009] In this application, an integrated busbar is used to connect each cell module to the integrated busbar, thereby achieving the connection between the cell, the high-voltage box, and the battery system. Since the low-voltage path on the integrated busbar is electrically connected to all cell modules, connecting the low-voltage path to the battery management system achieves electrical connection between all cell modules and the battery management system, avoiding the need for a separate wiring harness for each cell module. This reduces the use of wiring harnesses, saving space and cost. Furthermore, since the high-voltage path on the integrated busbar is electrically connected to all cell modules, and each high-voltage path only needs one main positive and main negative module to connect to the high-voltage box, it avoids the need for a separate conductive block for each cell module to connect to the high-voltage box, reducing the number of conductive blocks and components, and lowering costs. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0011] Figure 1 is a schematic diagram of the overall structure of a battery pack provided by some implementation methods of this application;

[0012] Figure 2 is a partial structural schematic diagram of a battery pack provided by some implementation methods of this application;

[0013] Figure 3 is a second partial structural schematic diagram of a battery pack provided by some implementation methods of this application;

[0014] Figure 4 is a partial structural cross-sectional schematic diagram of a battery pack provided by some implementation methods of this application.

[0015] In the diagram: 110 - enclosure; 120 - cell module; 130 - integrated busbar; 140 - main positive and main negative module; 150 - battery management system; 160 - high voltage box; 170 - adapter bar; 180 - connector;

[0016] 111 - Placement space; 121 - Battery cell; 101 - First aluminum busbar;

[0017] 131-High voltage path; 132-Low voltage path; 133-Connecting block assembly; 134-Second aluminum busbar;

[0018] 141 - Positive terminal; 142 - Negative terminal; 171 - First adapter bar; 172 - Second adapter bar;

[0019] 181 - Connector. Embodiments of the present invention

[0020] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0021] In related technologies, automotive battery packs generally adopt a cell-module-PACK form. This type of automotive battery pack has a relatively complex overall layout, with long wiring harnesses requiring space and fixing points for routing. Each cell requires a separate wiring harness to connect to the battery management system, resulting in a large number of wiring harnesses within the battery pack. Furthermore, in related technologies, after the cells are assembled into multiple modules, each module generally requires a separate conductive block to connect to the high-voltage unit (BDU), leading to a large number of conductive blocks and corresponding fasteners for securing them. Moreover, the conductive blocks typically need to be connected to the high-voltage unit via adapter copper busbars, resulting in a large number of adapter copper busbars within the battery pack, occupying significant space and increasing the overall cost. In addition, adapter copper busbars are also required to connect the high-voltage unit to external components; these adapter copper busbars not only occupy space but are also inconvenient to assemble and require high protection. This makes the entire battery pack structure complex, with low volume utilization and high cost.

[0022] To address the above technical issues, referring to Figures 1, 2, and 3, Figure 1 is a schematic diagram of the overall structure of a battery pack provided by some implementations of this application, Figure 2 is a schematic diagram of a partial structure of a battery pack provided by some implementations of this application, and Figure 3 is a schematic diagram of a partial structure of a battery pack provided by some implementations of this application. As shown in Figures 1, 2, and 3, some implementations of this application provide a battery pack, which includes a housing 110, cell modules 120, a high-voltage box 160, a battery management system 150, an integrated busbar 130, and a total positive and total negative module 140. The housing 110 has a placement space 111 for placing the cell modules 120, and the cell modules 120 are installed within the placement space 111 of the housing 110. The integrated busbar 130 includes a high-voltage path 131 and a low-voltage path 132, and each cell module 120 is electrically connected to both the high-voltage path 131 and the low-voltage path 132. The high-voltage path 131 is electrically connected to the high-voltage box 160 through the main positive and main negative module 140, and the low-voltage path 132 is electrically connected to the high-voltage box 160 through the battery management system 150.

[0023] In some implementations of this application, an integrated busbar 130 is set up, and each cell module 120 is connected to the integrated busbar 130. The integrated busbar 130 enables the connection between the cell 121 and the high-voltage box 160 and the battery system. Since the low-voltage path 132 on the integrated busbar 130 is electrically connected to all cell modules 120, connecting the low-voltage path 132 to the battery management system 150 achieves electrical connection between all cell modules 120 and the battery management system 150, avoiding the need for a separate wiring harness for each cell module 120 to connect to the battery management system 150. This reduces the use of wiring harnesses, saving space and cost. Since the high-voltage path 131 on the integrated busbar 130 is electrically connected to all cell modules 120, and one high-voltage path 131 can be connected to the high-voltage box 160 through only one main positive and main negative module 140, it avoids the need for a conductive block for each cell module 120 to connect to the high-voltage box 160, reducing the number of conductive blocks, reducing the number of parts, and lowering costs.

[0024] As shown in Figure 1, in some implementations of this application, the battery pack also includes an adapter bus 170, through which the total positive and total negative modules 140 are electrically connected to the high-voltage box 160. It should be noted that the adapter bus 170 in some implementations of this application can be an adapter copper bus.

[0025] In some implementations of this application, only one high-voltage path 131 can be set on the integrated busbar 130. Therefore, the integrated busbar 130 only needs to be connected to the high-voltage box 160 through a single positive and negative module 140. The positive and negative module 140 and the high-voltage box 160 need to be connected through a transition busbar 170. Therefore, only one transition busbar 170 is needed for the connection between the positive and negative module 140 and the high-voltage box 160. That is, in some implementations of this application, only one transition busbar 170 is needed to connect the integrated busbar 130 and the high-voltage box 160. Compared with the related technologies that require multiple conductive blocks and transition copper busbars, this application greatly reduces the number of transition busbars 170, which not only reduces the space occupied, but also reduces the number of parts used and lowers the overall cost of the battery pack.

[0026] As shown in Figure 1, in some implementations of this application, the total positive and total negative module 140 includes a total positive terminal 141 and a total negative terminal 142, which are located on both sides of the housing 110. The adapter bar 170 includes a first adapter bar 171 and a second adapter bar 172. The total positive terminal 141 is connected to the positive terminal of the high-voltage box 160 via the first adapter bar 171, and the total negative terminal 142 is connected to the negative terminal of the high-voltage box 160 via the second adapter bar 172.

[0027] In some implementations of this application, multiple battery cell modules 120 can be provided, and the high-voltage path 131 on the integrated busbar 130 needs to connect all the battery cell modules 120. Therefore, when setting up the high-voltage path 131, it is generally arranged in an "S" shape to connect all the battery cell modules 120 and facilitate wiring. According to the wiring method described above, the two ends of the high-voltage path 131 are generally located on both sides of the enclosure 110. Therefore, the two ends of the total positive and total negative module 140 connected to the high-voltage path 131: the total positive terminal 141 and the total negative terminal 142 are also located on both sides of the enclosure 110. The high-voltage box 160 is generally located in the middle of one side of the enclosure 110. In order to connect the total positive terminal 141 and the total negative terminal 142 to the high-voltage box 160 respectively, the adapter busbar 170 is provided with a first adapter busbar 171 and a second adapter busbar 172. The positive terminal 141 is connected to the positive terminal of the high-voltage box 160 via the first adapter 171, and the negative terminal 142 is connected to the negative terminal of the high-voltage box 160 via the second adapter 172, thereby realizing the electrical connection between the positive and negative module 140 and the high-voltage box 160.

[0028] As shown in Figure 1, in some implementations of this application, the battery pack also includes a connector 180, wherein the connector 180 is disposed on the side of the housing 110, and the connector 180 includes a plug 181, which is directly connected to the high voltage box 160.

[0029] In related technologies, external plugs and the high-voltage box 160 require a connecting copper busbar for connection. This connecting copper busbar not only occupies space but also hinders assembly and has high protection requirements. This results in a complex battery pack structure, low volume utilization, and high cost. In some implementations of this application, the connector 181 in the plug-in 180 is directly connected to the high-voltage box 160, eliminating the need for the connecting copper busbar and reducing costs. Simultaneously, it makes assembly more convenient.

[0030] Referring to Figure 4, which is a partial cross-sectional view of a battery pack according to some implementations of this application, Figure 4 shows a partial cross-sectional view of the connector 180 and the high-voltage box 160. As shown in Figure 4, in some implementations of this application, the connector 181 is electrically connected to the high-voltage box 160 by screws. The connector 181 is directly connected to the high-voltage box 160, which is convenient and quick. Using screws to achieve the electrical connection between the connector 181 and the high-voltage box 160 is simple and provides a stable fixation. Metal screws can be used in some implementations of this application.

[0031] In some implementations of this application, the battery pack includes at least two cell modules, and each cell module includes multiple cells. For example, the battery pack may contain two, three, four, or eight cell modules, etc.

[0032] In some implementations of this application, as shown in Figure 3, the battery pack includes four cell modules 120, each cell module 120 including multiple cells 121, with the same number and layout of cells 121 within each cell module 120. As shown in Figure 3, the housing 110 includes four placement spaces 111, all of the same size. Each placement space 111 contains two rows of cells 121, and cells 121 in the same row within two adjacent placement spaces 111 form a cell module 120. Therefore, the battery pack in some implementations of this application includes four cell modules 120. Of course, more cell modules 120 can be set according to specific needs; the specific number of cell modules 120 is not limited in some implementations of this application. Similarly, the specific arrangement of the cell modules 120 is not limited.

[0033] In some implementations of this application, the battery pack includes at least one integrated busbar, which is electrically connected to the cell modules. When the battery pack includes at least two integrated busbars, the high-voltage paths of the at least two integrated busbars are connected through a first aluminum busbar. For example, one integrated busbar, two integrated busbars, or a greater number of integrated busbars can be provided. The number of integrated busbars can be adaptively set according to the number of cell modules. For example, the number of integrated busbars can be determined based on the number of cell modules and the number of cell modules that each integrated busbar can connect to.

[0034] In some implementations of this application, as shown in Figure 1, the battery pack includes two integrated busbars 130, each integrated busbar 130 being electrically connected to two cell modules 120. The high-voltage paths 131 of the two integrated busbars 130 are connected via a first aluminum busbar 101. Since four cell modules 120 are provided in some implementations of this application, if only one integrated busbar 130 is provided, the size of the integrated busbar 130 would be too large. Therefore, two integrated busbars 130 are provided, and the high-voltage paths 131 of the two integrated busbars 130 are connected in series using a first aluminum busbar 101 to form a single high-voltage path 131.

[0035] In some implementations of this application, as shown in Figure 3, the battery cell module includes two rows of battery cell groups, and each battery cell group includes multiple battery cells. That is, when setting up the battery cell module, multiple battery cells can be arranged in two rows or two columns, making the aspect ratio and layout of the battery cell module more reasonable.

[0036] In some implementations of this application, the integrated busbar 130 includes two connecting block groups 133 and a second aluminum busbar 134. The connecting block groups 133 are electrically connected to the battery cell module 120. Specifically, the connecting block groups 133 are electrically connected to the battery cell group in the battery cell module 120. The two connecting block groups 133 are connected through the second aluminum busbar 134 to form a high-voltage path 131.

[0037] As shown in Figure 2, each integrated busbar 130 needs to be connected to two cell modules 120, and the integrated busbar 130 needs to electrically connect the two cell modules 120. To facilitate wiring, two connecting block groups 133 are provided near both sides of the integrated busbar 130. Each connecting block group 133 connects to the cell group on the same side of the two cell modules 120. A second aluminum busbar 134 is provided to connect the two connecting block groups 133 in series to form a high-voltage path 131.

[0038] In some implementations of this application, the integrated busbar 130 includes two sets of low-voltage circuits, each set of low-voltage circuits being electrically connected to a set of battery cell modules 120. Specifically, the low-voltage circuits are electrically connected to the battery cell group in the battery cell module 120 and to the battery management system 150.

[0039] Since each integrated busbar 130 needs to be connected to two cell modules 120, two sets of low-voltage circuits are provided on the integrated busbar 130. Each set of low-voltage circuits is electrically connected to the cell group on the same side of the two sets of cell modules 120. Then, the low-voltage circuits are electrically connected to the battery management system 150, so that all the cell modules 120 can be electrically connected to the battery management system 150.

[0040] In some implementations of this application, a vehicle is also provided, which includes the battery pack described in any of the implementations.

Claims

1. A battery pack, comprising a housing, cell modules, an integrated busbar, a main positive and main negative module, a battery management system, and a high-voltage box; The battery cell module is installed inside the housing; The integrated busbar includes a high-voltage path and a low-voltage path, and each of the battery cell modules is electrically connected to the high-voltage path and the low-voltage path; The high-voltage path is electrically connected to the high-voltage box through the total positive and total negative module, and the low-voltage path is electrically connected to the high-voltage box through the battery management system.

2. The battery pack according to claim 1, wherein, The battery pack also includes an adapter bus, through which the total positive and total negative modules are electrically connected to the high voltage box.

3. The battery pack according to claim 2, wherein, The battery pack also includes a connector disposed on the side of the housing. The connector includes a plug-in that is directly connected to the high-voltage box.

4. The battery pack according to any one of claims 1 to 3, wherein, The battery pack includes at least two cell modules, and each cell module includes multiple cells.

5. The battery pack according to claim 4, wherein, The battery pack includes at least one of the integrated busbars, which is electrically connected to the cell module; when the battery pack includes at least two of the integrated busbars, the high-voltage paths of the at least two integrated busbars are connected through a first aluminum busbar.

6. The battery pack according to claim 5, wherein, The battery module includes two rows of battery cells, and each battery cell group includes multiple battery cells.

7. The battery pack according to claim 6, wherein, The integrated busbar includes two connecting block groups and a second aluminum busbar. The connecting block groups are electrically connected to the battery cell group, and the two connecting block groups are connected through the second aluminum busbar to form the high-voltage path.

8. The battery pack according to claim 6 or 7, wherein, The integrated busbar includes two sets of low-voltage circuits, each set of low-voltage circuits being electrically connected to a set of the battery cells, and the low-voltage circuits being electrically connected to the battery management system.

9. The battery pack according to claim 2, wherein, The total positive and total negative module includes a total positive terminal and a total negative terminal, which are located on both sides of the housing, and the adapter includes a first adapter and a second adapter. The main positive terminal is connected to the positive terminal of the high-voltage box via the first adapter, and the main negative terminal is connected to the negative terminal of the high-voltage box via the second adapter.

10. The battery pack according to claim 3, wherein, The connector is electrically connected to the high-voltage box via screws.

11. A vehicle comprising a battery pack according to any one of claims 1 to 10.

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