Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, and relates to the technical field of batteries. The battery pack comprises a box body, a battery cell module, a high-voltage box, a battery management system, an integrated busbar and a total positive and total negative module, the battery cell modules are mounted in the box body, the integrated busbar comprises a high-voltage path and a low-voltage path, and each battery cell module is electrically connected with the high-voltage path and the low-voltage path. The high-voltage path is electrically connected with the high-voltage box through the total positive and total negative module, and the low-voltage path is electrically connected with the high-voltage box through the battery management system.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery pack and a vehicle. Background Technology

[0002] In related technologies, automotive battery packs generally adopt a cell-module-PACK format. This type of automotive battery pack has a relatively complex overall layout, with long wiring harnesses, requiring space for routing and fixing points, and a large number of copper busbars. Each cell module requires a separate wiring harness to connect to the battery management system, resulting in a large number of wiring harnesses within the battery pack. This makes the overall battery pack structure complex, with low volume utilization and high cost. Utility Model Content

[0003] 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.

[0004] In a first aspect, this application provides a battery pack, which includes 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 inside the housing. The integrated busbar includes a high-voltage path and a low-voltage path, and each cell module is electrically connected to both the high-voltage path and the low-voltage path. The high-voltage path is electrically connected to the high-voltage box via the main positive and main negative module, and the low-voltage path is electrically connected to the high-voltage box via the battery management system.

[0005] In one possible design of the first aspect, the battery pack also includes an adapter bus, through which the main positive and main negative modules are electrically connected to the high-voltage box.

[0006] In one possible design of the first aspect, the battery pack also includes a connector disposed on the side of the housing, the connector including a plug that is directly connected to the high-voltage box.

[0007] In one possible design of the first aspect, the battery pack includes at least two cell modules, each cell module including multiple cells.

[0008] In one possible design of the first aspect, the battery pack includes at least one integrated busbar that is electrically connected to the cell module; 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.

[0009] In one possible design of the first aspect, the cell module includes two rows of cell groups, each containing multiple cells.

[0010] In one possible design of the first aspect, 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 a high-voltage path.

[0011] In one possible design of the first aspect, the integrated busbar includes two sets of low-voltage circuits, each set of low-voltage circuits being electrically connected to a set of battery cells, and the low-voltage circuits being electrically connected to the battery management system.

[0012] In one possible design of the first aspect, the total positive and total negative module includes a total positive terminal and a total negative terminal, which are located on opposite sides of the enclosure. The adapter includes a first adapter and a second adapter. The total positive terminal is connected to the positive terminal of the high-voltage box via the first adapter, and the total negative terminal is connected to the negative terminal of the high-voltage box via the second adapter.

[0013] In one possible design of the first aspect, the connector is electrically connected to the high-voltage box by screws.

[0014] Secondly, this application provides a vehicle that includes a battery pack according to the first aspect and any possible design thereof.

[0015] The beneficial effects of this application are:

[0016] 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

[0017] 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. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a battery pack provided in an embodiment of this application;

[0019] Figure 2 This is one of the partial structural schematic diagrams of a battery pack provided in an embodiment of this application;

[0020] Figure 3 This is a second schematic diagram of a partial structure of a battery pack provided in an embodiment of this application;

[0021] Figure 4 This is a partial cross-sectional view of a battery pack provided in an embodiment of this application.

[0022] 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;

[0023] 111 - Placement space; 121 - Battery cell; 101 - First aluminum busbar;

[0024] 131-High voltage path; 132-Low voltage path; 133-Connecting block assembly; 134-Second aluminum busbar;

[0025] 141 - Positive terminal; 142 - Negative terminal; 171 - First adapter bar; 172 - Second adapter bar;

[0026] 181 - Connector. Detailed Implementation

[0027] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0028] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0029] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0030] It should be understood that the terminology used in the description of the various examples herein is for the purpose of describing the particular examples only and is not intended to be restrictive. As used in the description of the various examples, the singular forms “a” and “the” are intended to include the plural forms as well, unless the context explicitly indicates otherwise.

[0031] In this application, "at least one" means one, two, or more, and "more than" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0032] It should also be understood that, in this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a sliding connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0033] It should also be understood that the term “comprising” (also referred to as “includes”, “including”, “comprises” and / or “comprising”) as used in this specification specifies the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0034] It should be understood that the terms "an embodiment," "another embodiment," and "a possible design" used throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment or implementation is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment of this application," "in another embodiment of this application," and "a possible design" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0035] It should also be understood that the specific values ​​mentioned in the embodiments of this application are not intended to limit the specific dimensions of particular features or structures. The relevant values ​​may be illustrative examples for ease of understanding, or they may represent the theoretically optimal value for a certain feature. In practice, the relevant dimensions may be a range of values, such as ±10% or ±20% of the optimal theoretical value, depending on whether the corresponding technical effect can be achieved.

[0036] The term "perpendicular" in this application's embodiments includes similar cases, such as angles between lines, lines and surfaces, or surfaces ranging from 80° to 100°, which can also be understood as perpendicular, rather than strictly limiting the angle between them to 90°. Similarly, the term "parallel" in this application's embodiments also includes similar cases, namely angles between lines, lines and surfaces, or surfaces ranging from 0° to 10°, which can also be understood as parallel.

[0037] 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 that require 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.

[0038] To solve the above technical problems, refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the overall structure of a battery pack provided in an embodiment of this application. Figure 2 This is one of the partial structural schematic diagrams of a battery pack provided in an embodiment of this application. Figure 3 This is a second schematic diagram of a partial structure of a battery pack provided in an embodiment of this application. Figure 1 , Figure 2 and Figure 3 As shown in the figure, this application embodiment provides 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 negative module 140. The housing 110 has a placement space 111 for housing the cell modules 120, and the cell modules 120 are installed within the placement space 111. 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 total positive and negative module 140, and the low-voltage path 132 is electrically connected to the high-voltage box 160 through the battery management system 150.

[0039] In this embodiment, an integrated busbar 130 is provided, and each cell module 120 is connected to the integrated busbar 130. The integrated busbar 130 enables the connection between the cell 121, 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.

[0040] like Figure 1 As shown, in one embodiment of this application, the battery pack further includes an adapter busbar 170, through which the total positive and total negative module 140 is electrically connected to the high-voltage box 160. It should be noted that the adapter busbar 170 in this embodiment can be an adapter copper busbar.

[0041] In this embodiment, only one high-voltage path 131 can be provided 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 this embodiment, only one transition busbar 170 is needed to connect the integrated busbar 130 and the high-voltage box 160. Compared with the prior art, which requires 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, thus reducing the overall cost of the battery pack.

[0042] like Figure 1 As shown, in one embodiment 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 opposite 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.

[0043] In this embodiment, 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 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 housing 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 housing 110. The high-voltage box 160 is generally located in the middle of one side of the housing 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 170 is provided with a first adapter 171 and a second adapter 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.

[0044] like Figure 1 As shown, in one embodiment of this application, the battery pack further 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.

[0045] In existing technologies, external connectors and the high-voltage box 160 require a copper busbar for connection. This 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 this embodiment, by directly connecting the connector 181 in the connector 180 to the high-voltage box 160, the use of a copper busbar is eliminated, reducing costs. Simultaneously, assembly becomes more convenient.

[0046] refer to Figure 4 , Figure 4 This is a partial cross-sectional view of a battery pack provided in an embodiment of this application. Figure 4 This is a partial cross-sectional view of the connector 180 and the high-voltage box 160. (See attached image.) Figure 4 As shown, in one embodiment of this application, the connector 181 is electrically connected to the high-voltage box 160 via 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 secure fixation. The screws used in this embodiment can be metal screws.

[0047] In one embodiment 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.

[0048] In one embodiment of this application, as Figure 3 As shown, the battery pack includes four cell modules 120, and each cell module 120 includes multiple cells 121. The number and layout of the cells 121 within each cell module 120 are identical. For example... Figure 3 As shown, the housing 110 includes four placement spaces 111, all of the same size. Each placement space 111 contains two rows of battery cells 121. The battery cells 121 in the same row within two adjacent placement spaces 111 form a battery cell module 120. Therefore, the battery pack in this embodiment includes four battery cell modules 120. Of course, more battery cell modules 120 can be provided according to specific needs. In this embodiment, the specific number of battery cell modules 120 is not limited. Similarly, the specific arrangement of the battery cell modules 120 is not limited.

[0049] In one embodiment 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.

[0050] In one embodiment of this application, as Figure 1 As shown, the battery pack includes two integrated busbars 130, each of which is electrically connected to two cell modules 120. The high-voltage paths 131 of the two integrated busbars 130 are connected by a first aluminum busbar 101. Since four cell modules 120 are provided in this embodiment, the size of the integrated busbar 130 would be too large if only one integrated busbar 130 is provided. Therefore, two integrated busbars 130 are provided, and the high-voltage paths 131 of the two integrated busbars 130 are connected in series by the first aluminum busbar 101 to form a single high-voltage path 131.

[0051] In one embodiment of this application, as Figure 3 As shown, 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.

[0052] In one embodiment 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.

[0053] like Figure 2 As shown, 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.

[0054] In one embodiment 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 groups in the battery cell module 120 and to the battery management system 150.

[0055] 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.

[0056] In one embodiment of this application, a vehicle is also provided, which includes the battery pack described in any of the embodiments.

[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0059] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the scope of protection of this application includes the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of this application.

[0060] This document uses specific examples to illustrate the working principle and implementation method of the battery pack and vehicle of this application. The above description of the embodiments is only for the purpose of helping to understand the specific settings and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation method and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

[0061] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery pack, characterized in that, This includes the enclosure, cell modules, integrated busbars, main positive and main negative modules, battery management system, and 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, characterized in that, 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, characterized in that, 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, characterized in that, The battery pack includes at least two cell modules, and each cell module includes multiple cells.

5. The battery pack according to claim 4, characterized in that, 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, characterized in that, 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, characterized in that, 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, characterized in that, 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, characterized in that, 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, characterized in that, The connector is electrically connected to the high-voltage box via screws.

11. A vehicle, characterized in that, The vehicle includes the battery pack as described in any one of claims 1 to 10.

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