Battery module and vehicle

Abstract

A battery module and a vehicle. The battery module comprises a case, a cell group (104), a CCS assembly (1), and an acquisition assembly. The cell group (104) is mounted in the case and comprises a plurality of cells (103). The CCS assembly (1) comprises acquisition lines (11) electrically connected to the plurality of cells (103) and connecting circuit boards (12) each connected to one end of the corresponding acquisition line (11). The acquisition assembly comprises a mounting bracket (2) and a CSC assembly; the mounting bracket (2) is mounted in the case and is arranged opposite to the cell group (104); and the CSC assembly is arranged on a side portion of the mounting bracket (2) and is directly electrically connected to the connecting circuit boards (12).

Description

Battery modules and vehicles

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 22, 2023, with application number 202323168263.7. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery module and a vehicle. Background Art

[0003] Battery systems often use multiple modules connected in series and installed on trays. After the CCS (Cells Contact System, integrated busbar) component collects the voltage and temperature signals of multiple modules, it is connected to the CSC (Cell Supervision Circuit, battery monitoring unit) component through an intermediate adapter harness. SUMMARY OF THE INVENTION

[0004] In the related art, the intermediate adapter harnesses are numerous and complex to assemble. At the same time, the adapter positions of the intermediate adapter harnesses are prone to poor contact, which in turn leads to abnormal BMU (Battery Management Unit) data collection and poor practicality.

[0005] In a first aspect, the present application provides a battery module. The battery module includes:

[0006] Box;

[0007] A battery cell group, installed in the box and including multiple battery cells;

[0008] The CCS assembly includes a collection line electrically connected to the plurality of battery cells and a connection circuit board connected to one end of the collection line;

[0009] The acquisition component includes a mounting bracket and a CSC component. The mounting bracket is installed in the box and arranged opposite to the battery cell group. The CSC component is arranged on the side of the mounting bracket and is directly electrically connected to the connection circuit board.

[0010] In a second aspect, the present application further provides a vehicle. The vehicle includes a battery module, which comprises a housing, a cell group, a CCS assembly, and a collection assembly. The cell group is mounted within the housing and includes multiple cells. The CCS assembly includes a collection line electrically connected to the multiple cells and a connection circuit board connected to one end of the collection line. The collection assembly includes a mounting bracket and a CSC assembly. The mounting bracket is mounted within the housing and disposed opposite the cell group. The CSC assembly is disposed on the side of the mounting bracket and is directly electrically connected to the connection circuit board. Beneficial effects

[0011] The battery module provided in the present application places the mounting bracket relative to the plurality of battery cells so that the mounting bracket is close to the CCS assembly, thereby facilitating a direct connection between the circuit board and the CSC assembly mounted on the mounting bracket. This eliminates the need for an intermediate adapter harness used in the related art to connect the circuit board and the CSC assembly, reduces unnecessary materials, improves assembly efficiency, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic diagram of the overall structure of the battery module provided in this application.

[0013] FIG2 is an exploded view of the battery module provided in this application.

[0014] FIG3 is a schematic diagram of the CSC assembly and the CCS assembly provided in this application.

[0015] FIG4 is a schematic diagram of some CSC components and CCS components provided in this application.

[0016] FIG5 is an enlarged view of point A in FIG4 .

[0017] FIG6 is a schematic diagram of a CSC assembly provided in the present application.

[0018] FIG7 is an exploded view of the CSC assembly provided by the present application.

[0019] Description of reference numerals:

[0020] 1. CCS assembly; 11. Acquisition line; 12. Connection circuit board; 13. Connection row; 2. Mounting bracket; 21. First mounting surface; 211. First fixing protrusion; 22. Second mounting surface; 221. Second fixing protrusion; 23. Fixing ear; 24. Mounting ear; 241. Slit; 3. First CSC assembly; 30. Acquisition board; 31. First acquisition board; 32. First connector; 321. First connection socket; 4. Second CSC assembly Components; 41. Second acquisition board; 42. Second connector; 421. Second connection socket; 60. First heat-conducting structure; 5. Second heat-conducting plate; 6. First heat-conducting plate; 61. First section; 62. Second section; 63. Third section; 70. Second heat-conducting structure; 7. Thermal foam; 8. Buckle; 9. Cell bracket; 10. Liquid cooling plate; 101. Connection structure; 102. Insulation plate; 103. Cell; 104. Cell group; 105. Cell row. Modes for Carrying Out the Invention

[0021] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0022] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0024] Example 1

[0025] 3, 4 and 5, a battery module provided in the present application includes:

[0026] Box;

[0027] A battery cell group 104 is installed in the box and includes a plurality of battery cells 103;

[0028] The CCS assembly 1 includes a collection line 11 configured to be electrically connected to the plurality of battery cells 103 and a connection circuit board 12 connected to one end of the collection line 11;

[0029] The acquisition component includes a mounting bracket 2 and a CSC component. The mounting bracket 2 is installed in the box and is arranged opposite to the battery cell group 104. The CSC component is arranged on the side of the mounting bracket 2 and is directly electrically connected to the connection circuit board 12.

[0030] In some embodiments, referring to FIG. 2 , the cell group 104 includes a plurality of cell rows 105 , which are spaced apart along the width direction of the connection structure 101 , and each cell row 105 includes a plurality of cells 103 , which are spaced apart along the length direction of the connection structure.

[0031] When multiple modules are connected in series within a battery pack, the CCS assembly 1 collects voltage and temperature signals from multiple modules and then connects them to the CSC assembly via an intermediate adapter harness. This results in numerous wiring harnesses and complex assembly. However, by positioning the mounting bracket 2 relative to the multiple battery cells 103, the mounting bracket 2 is positioned closer to the CCS assembly 1, shortening the distance between the connecting circuit board 12 and the CSC assembly. This facilitates direct connection between the connecting circuit board 12 and the CSC assembly mounted on the mounting bracket 2, eliminating the intermediate adapter harness used in related art to connect the circuit board 12 and the CSC assembly. This results in a simple structure and easy assembly.

[0032] Example 2

[0033] 3 , 4 and 5 , a battery module provided in the present application includes a housing, a cell group 104 , a plurality of CCS components 1 and a collection component.

[0034] The battery cell group 104 is disposed in the box and includes a plurality of battery cells 103 . The battery cells 103 are cylindrical batteries or square batteries. The following embodiments are described using cylindrical batteries as an example.

[0035] The CCS assembly 1 includes a collection line 11 electrically connected to a plurality of battery cells 103 and a connection circuit board 12 connected to one end of the collection line 11.

[0036] The collection component includes a mounting bracket 2 and a CSC component. The mounting bracket 2 is disposed in the box and opposite to the cell group 104 . The mounting bracket 2 includes a first mounting surface 21 and a second mounting surface 22 opposite to each other. The second mounting surface 22 faces the cell group 104 .

[0037] Referring to Figures 6 and 7 , the multiple CSC assemblies include a first CSC assembly 3 and a second CSC assembly 4. The first CSC assembly 3 is disposed on the first mounting surface 21, and the second CSC assembly 4 is disposed on the second mounting surface 22. In this embodiment, two first CSC assemblies 3 are disposed on the first mounting surface 21, with the second CSC assembly 4 positioned between the two first CSC assemblies 3, and the second CSC assembly 4 is staggered relative to the two first CSC assemblies 3. Distributing the multiple CSC assemblies on the first mounting surface 21 and the second mounting surface 22 improves the installation space utilization of the mounting bracket 2 and reduces the volume of the battery module. Furthermore, staggering the CSC assemblies on the first mounting surface 21 and the second mounting surface 22 helps reduce thermal interference between the multiple CSC assemblies and improves heat dissipation efficiency.

[0038] In some embodiments, the first CSC assembly 3 includes a first acquisition board 31 and a first connector 32 disposed on one side of the first acquisition board 31. The second CSC assembly 4 includes a second acquisition board 41 and a second connector 42 disposed on one side of the second acquisition board 41. A plurality of first fixing protrusions 211 are provided on the first mounting surface 21, and a plurality of second fixing protrusions 221 are provided on the second mounting surface 22. The first acquisition board 31 is bolted to the plurality of first fixing protrusions 211 and maintains a distance from the first mounting surface 21. The second acquisition board 41 is bolted to the plurality of second fixing protrusions 221 and maintains a distance from the second mounting surface 22.

[0039] Specifically, the first connector 32 and the second connector 42 are respectively electrically connected to the connection circuit board 12 of the corresponding CCS assembly 1. The first connector 32 is located between the first acquisition board 31 and the first mounting surface 21, and the second acquisition board 41 is located between the second connector 42 and the second mounting surface 22. This maximizes the use of the mounting space on the mounting bracket 2 and facilitates electrical connection between the connection circuit board 12 and the first connector 32 and the second connector 42.

[0040] 6 and 7 , the first connector 32 is provided with a first connection socket 321 opening toward the CCS component 1, and the second connector 42 is provided with a second connection socket 421 opening toward the CCS component 1. The connection circuit board 12 corresponding to the CCS component 1 is inserted into the first connection socket 321 or the second connection socket 421. Compared with being set on the side, the acquisition line 11 does not need to be bent too much, thereby reducing damage to the acquisition line 11.

[0041] 7 , two fixing ears 23 and two mounting ears 24 are provided on the second mounting surface 22 . The two mounting ears 24 are located between the two fixing ears 23 . A gap 241 is provided on the surface of any mounting ear 24 facing the other mounting ear 24 . The gap 241 passes through the mounting ear 24 in a direction away from the second mounting surface 22 .

[0042] The second CSC assembly 4 further includes a heat conducting member, which includes a first heat conducting structure 60. The first heat conducting structure 60 includes a first heat conducting sheet 6 and a second heat conducting sheet 5.

[0043] The first heat conducting plate 6 includes a second section 62 and a first section 61 and a third section 63 connected to both ends of the second section 62. The first section 61 is disposed opposite to the second mounting surface 22.

[0044] The third section 63 is positioned at an angle to the second mounting surface 22. The middle portion of the third section 63 is connected to one end of the second section 62, and both ends of the third section 63 are positioned within the gap 241. The first thermally conductive sheet 6 is positioned between the two mounting ears 24 and forms an interference fit with the two mounting ears 24 and the mounting bracket 2. The second thermally conductive sheet 5 is thermally connected between the third section 63 and the bottom of the housing, which can be a crossbeam located at the bottom of the housing. Heat from the second collection board 41 is transferred to the housing via the first and second thermally conductive sheets 6 and 5.

[0045] The advantage of splitting the heat-conducting structure into the first heat-conducting sheet 6 and the second heat-conducting sheet 5 is that the limited volume of the mounting ear 24 does not make it convenient to set a larger gap 241 for the third section 63 of the first heat-conducting sheet 6 and the second heat-conducting sheet 5 to be inserted. Therefore, only the third section 63 of the first heat-conducting sheet 6 is set in the gap 241. At the same time, the thickness of the second heat-conducting sheet 5 can be adjusted according to the distance between the third section 63 and the bottom of the box to achieve smooth heat conduction.

[0046] Specifically, the heat conducting element further includes multiple second heat conducting structures 70. In this embodiment, three second heat conducting structures 70 are provided. Two second heat conducting structures 70 are respectively disposed between the surfaces of the first collection plates 31 of the two first CSC assemblies 3 facing away from the first mounting surface 21 and the side wall of the housing. One second heat conducting structure 70 is thermally connected between the first section 61 of the first heat conducting sheet 6 and the second collection plate 41. More specifically, in this embodiment, the second heat conducting structure 70 is a thermally conductive foam 7, which not only conducts heat but also acts as a buffer against external impacts.

[0047] In some embodiments, the two fixing ears 23 are bolted to the crossbeam of the box. Specifically, the first mounting surface 21 of the mounting bracket 2 is also provided with a buckle 8, which is snapped into the box, and the mounting bracket 2 is fixedly installed in two ways. The mounting bracket 2, the two fixing ears 23 and the two mounting ears 24 are integrally formed. In this embodiment, the third section 63 is at a 90° angle to the second mounting surface 22, and the first heat conducting plate 6 and the second heat conducting plate 5 are made of the same metal material.

[0048] The present invention also provides a vehicle including a battery module and a BMS battery management system. The BMS battery management system is configured to be electrically connected to the CSC component to collect cell information and detect cell voltage and temperature.

[0049] Example 3

[0050] Referring to Figures 1, 2, and 3, this embodiment provides a battery module comprising a housing, a cell group 104, multiple CCS assemblies 1, and a collection assembly. Cell group 104 comprises multiple cell rows 105 spaced apart along the width of a connecting structure 101. Each cell row 105 comprises multiple cells 103 spaced apart along the length of the connecting structure. Furthermore, the battery module comprises a cell support 9, multiple liquid cooling plates 10, a connecting structure 101, and an insulating plate 102.

[0051] Multiple battery cells 103 are mounted on a cell holder 9, which is made of an insulating material and insulates the cells 103 from the housing. The cell holder 9 is provided with multiple holes corresponding to the cells 103, which serve as pressure relief valves to expose the cells 103. Two liquid cooling plates 10 are located on either side of the cell group 104 to cool the outermost cells 103. The remaining liquid cooling plates 10 are located between the cells 103 to cool the cells 103.

[0052] Multiple battery cells 103 and liquid cooling plates 10 are disposed within the connection structure 101, with the positive and negative electrodes of the multiple battery cells 103 exposed on the upper surface of the connection structure 101. Multiple battery cells 103 are independently disposed within the connection structure 101, thereby preventing the spread and diffusion of thermal runaway of a single battery cell 103. The connection structure 101 connects the multiple battery cells 103 and the multiple liquid cooling plates 10 into a single entity, thereby improving the overall strength of the battery module. The connection structure 101 is constructed of foam. In actual production, after the multiple battery cells 103 and the multiple liquid cooling plates 10 are arranged as configured, the foam is poured in to fill the gaps between the multiple battery cells 103 and the multiple liquid cooling plates 10, thereby achieving an integrated arrangement of the multiple battery cells 103 and the multiple liquid cooling plates 10.

[0053] The plurality of CCS assemblies 1 are electrically connected to the plurality of battery cells 103 , and the insulating plate 102 covers the plurality of CCS assemblies 1 .

[0054] The CCS assembly 1 further includes a plurality of connecting bars 13 electrically connected to the collection line 11, which connect adjacent cells 103 in series. The insulating plate 102 and the plurality of connecting bars 13 are provided with vent holes, which are provided to prevent the overflow of the foaming glue and to exhaust the gas during the foaming process.

[0055] The actual assembly process of the battery module of this embodiment is as follows:

[0056] After the battery cells 103 and liquid cooling plate 10 are stacked on the fixture, the CCS assembly 1 is installed and welded. Structural adhesive is then applied to the surface of the CCS assembly 1, and the insulating plate 102 is bonded to the upper surface of the CCS assembly 1. The entire module is then mounted on the cell holder 9, and the contact area between the cell holder 9 and the battery cells 103 is secured with glue. The module is then hoisted into the box, and the data acquisition component is installed within the box. The connector on the CCS assembly 1 is then plugged into the connection circuit board 12 of the data acquisition component to collect the voltage and temperature signals of the battery cells 103.

Claims

1. A battery module, comprising: Box; A battery cell group (104), installed in the box and comprising a plurality of battery cells (103); A CCS assembly (1) comprising a collection line (11) electrically connected to a plurality of the battery cells (103) and a connection circuit board (12) connected to one end of the collection line (11); A collection component comprises a mounting bracket (2) and a CSC component, wherein the mounting bracket (2) is mounted in the box and arranged opposite to the battery cell group (104), and the CSC component is arranged on the side of the mounting bracket (2) and is directly electrically connected to the connection circuit board (12).

2. The battery module according to claim 1, wherein: The CSC assembly comprises a collection board (30), the collection board (30) being arranged on the mounting bracket (2), the battery module further comprising a heat conducting member thermally connected between the box body and the collection board, and the mounting bracket (2) being fixed to the bottom of the box body.

3. The battery module according to claim 1 or 2, wherein: The number of the CSC components is multiple, the mounting bracket (2) comprises a first mounting surface (21) and a second mounting surface (22) which are arranged opposite to each other, the second mounting surface (22) faces the battery cell group, and the multiple CSC components are respectively arranged on the first mounting surface (21) and the second mounting surface (22).

4. The battery module according to claim 3, wherein: Two CSC components are arranged on the first mounting surface (21); one CSC component is arranged on the second mounting surface (22), and the one CSC component located on the second mounting surface (22) is staggered with the two CSC components located on the first mounting surface (21).

5. The battery module according to claim 2, wherein: The heat conducting member comprises a first heat conducting structure (60), wherein the first heat conducting structure (60) is heat-conductively connected to the bottom of the box body and the collection plate (30).

6. The battery module according to claim 5, wherein: The mounting bracket (2) is provided with two mounting ears (24), at least one of the mounting ears (24) is provided with a gap (241), the first heat-conducting structure (60) comprises a first heat-conducting sheet (6) heat-conductingly connected between the bottom of the box body and the collection plate (30), the first heat-conducting sheet (6) being inserted into the gap (241).

7. The battery module according to claim 6, wherein: The mounting bracket (2) comprises a first mounting surface (21) and a second mounting surface (22) which are arranged opposite to each other, the second mounting surface (22) faces the battery cell group (104), a plurality of CSC components are provided and are respectively arranged on the first mounting surface (21) and the second mounting surface (22), the two mounting ears (24) are arranged on the second mounting surface (22), the first heat conducting sheet (6) comprises a first section (61), a third section (63) and a second section (62) connected between the first section (61) and the third section (63), the first section (61) is arranged opposite to the second mounting surface (22), the third section (63) is arranged at an angle with the second mounting surface (22), and the third section (63) is inserted into the gap (241).

8. The battery module according to claim 7, wherein: The first heat-conducting structure (60) further comprises a second heat-conducting sheet (5), wherein the second heat-conducting sheet (5) is heat-conductingly connected between the third section (63) and the bottom of the box.

9. The battery module according to claim 7, wherein: The heat conducting member further comprises a plurality of second heat conducting structures (70), at least one of the second heat conducting structures (70) being heat-conductively connected between the CSC assembly located on the first mounting surface (21) and the side wall of the box body, and at least one of the second heat conducting structures (70) being heat-conductively connected between the first section (61) and the collection board.

10. The battery module according to claim 7, wherein: The CSC component comprises an acquisition board (30) and a connector provided on one side of the acquisition board (30), the connector being electrically connected to the corresponding connection circuit board (12), the connector of at least one of the CSC components being located between the acquisition board (30) and the first mounting surface (21), and the acquisition board (30) of at least one of the CSC components being located between the connector and the second mounting surface (22).

11. The battery module according to claim 10, wherein: The first mounting surface (21) is provided with a plurality of first fixing protrusions (211), the second mounting surface (22) is provided with a plurality of second fixing protrusions (221), the acquisition board (30) of the CSC assembly is mounted on the corresponding first fixing protrusions (211) and the second fixing protrusions (221), and there is a distance between the acquisition board (30) and the first mounting surface (21) and the second mounting surface (22).

12. The battery module according to claim 10, wherein: The connector is provided with a connection socket opening toward the CCS component (1), and the connection circuit board (12) is arranged in the corresponding connection socket.

13. The battery module according to claim 7, wherein: A buckle (8) is provided on the first mounting surface (21) of the mounting bracket (2), and the buckle (8) is snapped into the box.

14. The battery module according to any one of claims 1 to 13, further comprising a cell holder (9), a plurality of the cell holders (103) being mounted on the cell holder (9), a plurality of holes being provided on the cell holder (9), and the pressure relief valves of the cell holders (103) being configured to correspond one-to-one to the plurality of holes.

15. The battery module according to any one of claims 1 to 13, further comprising a plurality of liquid cooling plates (10); The battery cell group (104) further comprises a plurality of battery cell rows (105), each of the battery cell rows (105) comprising a plurality of the battery cells (103); in, The liquid cooling plates (10) are provided on both sides of the battery cell group (104), and two adjacent battery cell rows (105) are provided with a liquid cooling plate (10).

16. A vehicle comprising the battery module according to any one of claims 1 to 15.

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