CCS support, CCS assembly, and battery module

Abstract

The present application relates to the technical field of batteries, and provides a CCS support, a CCS assembly, and a battery module. The CCS support comprises a first support and a second support; the first support is configured to mount an electrical component of the CCS assembly; the second support is connected to the first support; and a positioning structure configured to position the CCS support relative to a battery cell is provided on the second support.

Description

CCS bracket, CCS components and battery modules

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 22, 2024, application number 202410090025.9, the entire contents of which 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 CCS bracket, a CCS assembly and a battery module. Background Art

[0003] In related technologies, a Cell Contact System (CCS) assembly consists of a bracket, a busbar mounted on the bracket, and a collection element that electrically connects the busbar to the printed circuit board assembly (PCBA). To control costs, the bracket is typically made of a relatively soft plastic material. SUMMARY OF THE INVENTION

[0004] When installing the CCS component on the battery cell, the bracket is too flexible to easily position the CCS component relative to the battery cell, resulting in poor installation position accuracy of the CCS component and position deviation.

[0005] In a first aspect, an embodiment of the present application provides a CCS bracket, which includes a first bracket and a second bracket; the first bracket is configured to install electrical components of the CCS assembly; the second bracket is connected to the first bracket, and the second bracket is provided with a positioning structure configured to position the first bracket relative to the battery cell.

[0006] In a second aspect, an embodiment of the present application provides a CCS assembly, which includes a busbar, a collection component, and the aforementioned CCS bracket; the busbar is disposed on the first bracket; and the collection component is electrically connected to the busbar.

[0007] On the third aspect, the present application also provides a battery module, which includes a battery cell and the aforementioned CCS assembly, the battery cell cooperates with the positioning structure, and the battery cell is electrically connected to the bus bar. Beneficial effects

[0008] The present application positions the first bracket and the battery cell through the second bracket, which can increase the strength of the part where the CCS bracket and the battery cell are positioned and matched, thereby improving the rigidity of the part where the CCS bracket and the battery cell are positioned and matched, and then facilitating the positioning of the CCS bracket relative to the battery cell, and ultimately improving the installation position accuracy of the CCS component. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a schematic structural diagram of a bracket provided in an embodiment of the present application;

[0010] Figure 2 is an enlarged view of point C in Figure 1;

[0011] FIG3 is a schematic structural diagram of a second bracket provided in an embodiment of the present application;

[0012] FIG4 is a schematic diagram of the cooperation between the second bracket and the battery cell provided in an embodiment of the present application;

[0013] Figure 5 is a cross-sectional view along line BB in Figure 3;

[0014] FIG6 is a schematic structural diagram of a second bracket from another perspective provided by an embodiment of the present application;

[0015] FIG7 is a schematic structural diagram of a bracket from another perspective provided by an embodiment of the present application;

[0016] FIG8 is a schematic structural diagram of a first bracket provided in an embodiment of the present application;

[0017] FIG9 is an enlarged view of point A in FIG4 ;

[0018] FIG10 is a schematic structural diagram of a CCS assembly provided in an embodiment of the present application;

[0019] FIG11 is an enlarged view of point D in FIG10 .

[0020] Description of Figure Numbers:

[0021] 001-CCS bracket; 002-battery cell; 021-pole; 022-step groove;

[0022] 011-first bracket; 111-hot riveting hole; 112-mounting slot; 113-busbar positioning slot; 114-second hot riveting column; 115-connecting hole; 116-first side; 117-second side

[0023] 012 - second bracket; 121 - positioning hole; 122 - bump; 1221 - chamfer; 1222 - first side wall; 1223 - first end face; 123 - first heat rivet column; 124 - main through hole; 125 - strip hole;

[0024] 003-CCS assembly, 031-bus; 032-collection piece. Modes for Carrying Out the Invention

[0025] In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application. In the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0027] The terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0028] In the description of the embodiments of this application, words such as "example" or "for example" are used to indicate an example, illustration, or description. Any embodiment or design described as "for example" or "for example" in the embodiments of this application is not to be construed as being preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to clearly present relative concepts.

[0029] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the structure of a bracket provided in an embodiment of the present application, and Figure 2 is an enlarged view of point C in Figure 1. This embodiment of the present application provides a CCS bracket 001, which includes a first bracket 011 and a second bracket 012. First bracket 011 is configured to mount electrical components of the CCS assembly. Second bracket 012 is connected to first bracket 011. Second bracket 012 is provided with a positioning structure configured to position first bracket 011 relative to the battery cell.

[0030] It will be understood that the electrical components of the CCS assembly include but are not limited to busbars, collectors, and output terminals. Portions of the busbars are electrically connected to the battery cells. Both the first bracket 011 and the second bracket 012 are insulating brackets, used to insulate the busbars and output terminals not electrically connected to the battery cells from the battery cells. Specifically, the first bracket 011 is a support bracket, used to support the electrical components of the CCS assembly. The second bracket is a positioning bracket, used to position the first bracket 011 relative to the battery cells.

[0031] Furthermore, the positioning between the second bracket 012 and the battery cell can be achieved by providing a positioning groove or positioning hole on the second bracket 012 and a structure on the battery cell that cooperates with the positioning groove or positioning hole; or by providing a positioning groove or positioning hole on the battery cell casing and a structure on the second bracket 012 that cooperates with the positioning groove or positioning hole. Thus, by providing the positioning groove or positioning hole and the structure that cooperates with it, the second bracket 012 can be positioned relative to the battery cell, and thus the CCS bracket 001 can be positioned relative to the battery cell.

[0032] The portion of the battery cell that cooperates with the positioning structure can be specifically arranged on the pole of the battery cell, or on the shell body of the battery cell.

[0033] Exemplarily, the second bracket 012 is bonded to the first bracket 011 by gluing or hot riveting.

[0034] In this embodiment, the first bracket 011 is positioned with the battery cell by the second bracket 012, which can increase the strength of the portion where the CCS bracket 001 and the battery cell are positioned and matched, thereby improving the rigidity of the portion where the CCS bracket 001 and the battery cell are positioned and matched, thereby facilitating the positioning of the CCS bracket 001 relative to the battery cell, and ultimately improving the installation position accuracy of the CCS component.

[0035] The first bracket 011 and the second bracket 012 can be made of the same material. By providing the first bracket 011 and the second bracket 012 connected to the first bracket 011, the strength of the CCS bracket 001 and the electric chip's positioning and mating area can be increased, thereby improving the rigidity of the positioning and mating area, facilitating the positioning of the CCS bracket 001 and the battery cell, and thereby improving assembly efficiency.

[0036] Furthermore, the first bracket 011 and the second bracket 012 can be made of different materials or with different processes. In this case, not only can the addition of the second bracket 012 increase the strength of the CCS bracket 001 and the electronic chip's positioning and mating portion, thereby improving the rigidity of this positioning and mating portion, but the rigidity of the second bracket 012 can also be further improved by setting the rigidity of the second bracket 012 to be greater than that of the first bracket 011. For example, the first bracket 011 is a blister bracket made of PC with a thickness of 0.5 mm, while the second bracket 012 is a plastic bracket made of PC+ABS with a thickness of 1.2-1.5 mm.

[0037] In this way, the second bracket 012 is only configured at the position where the CCS bracket 001 and the battery cell are positioned. This can not only effectively control the material cost of the CCS bracket 001 on the basis of improving the installation position accuracy of the CCS component, but also reduce the space occupancy rate of the CCS bracket, which is beneficial to the layout of components such as electrical parts inside the battery.

[0038] Please refer to Figure 3, which is a schematic diagram of the structure of the second bracket 012 provided in an embodiment of the present application. In one embodiment, the positioning structure includes a positioning hole 121 provided on the second bracket 012. The positioning hole 121 is configured to be sleeved on the battery cell.

[0039] As can be understood, the positioning hole 121 is sleeved onto the end of the battery cell near the terminal 021. The outer surface of the battery cell, near the CCS assembly, has a stepped groove 022, which extends along the periphery of the battery cell into an annular groove. Along the axial direction of the battery cell, the second bracket 012 contacts one side wall of the stepped groove 022, achieving a retaining engagement between the second bracket 012 and the battery cell, as shown in Figure 4, which is a schematic diagram of the engagement between the second bracket 012 and the battery cell according to an embodiment of the present application.

[0040] Specifically, the positioning hole 121 is configured to be sleeved onto the battery cell's pole. The step groove 022 is provided on the outer circumference of the pole, near the end face of the battery cell. The cross-sectional shape of the positioning hole 121 is consistent with the cross-sectional shape of the battery cell's pole. For example, when the pole is cylindrical, the cross-sectional shape of the positioning hole 121 is circular; when the pole is square, the cross-sectional shape of the positioning hole 121 is square. Exemplarily, there are two positioning holes 121, one at each end of the second bracket 012.

[0041] During implementation, the fit between positioning hole 121 and the battery cell can be modified based on the operating environment. For example, when the battery is used in a sub-zero temperature environment, the battery cell's expansion rate is low, so positioning hole 121 can provide a smooth fit with the battery cell. When the battery is used in an environment with temperatures above zero, the higher the ambient temperature, the greater the battery cell's expansion rate. Therefore, positioning hole 121 and the battery cell have a clearance fit to provide a buffer for the battery cell's expansion, thereby reducing the stress on the CCS bracket 001 caused by the battery cell's expansion.

[0042] A connecting through hole 115 is provided on the first bracket 011 at a position opposite to the positioning hole 121 , so that the busbar of the CCS assembly can be electrically connected to the pole 021 of the battery cell through the connecting through hole 115 .

[0043] Since the CCS bracket 001 is formed by vacuum molding, its molding cost is low. Therefore, in this embodiment, by adopting the above-mentioned positioning structure, the shell structure of the battery cell is simplified, which is conducive to controlling the manufacturing cost of the battery.

[0044] 3 or 4 , in one embodiment, a plurality of protrusions are disposed on the wall of the positioning hole 121 . The plurality of protrusions 122 are spaced apart along the circumference of the positioning hole 121 .

[0045] It is understood that, depending on the temperature of the battery's operating environment, the bump may contact the outer circumference of the battery cell, or the side of the bump facing the battery cell may be in a clearance fit with the outer circumference of the battery cell. Specifically, the bump may contact or be in a clearance fit with the outer circumference of the battery cell's pole.

[0046] In this embodiment, multiple protrusions cooperate with the outer peripheral surface of the battery cell, so that the contact between the outer surface of the battery cell and the second bracket 012 is more uniform, and the contact stress between the battery cell and the second bracket 012 is more uniform, which is beneficial to improving the working stability of the CCS bracket 001.

[0047] Please refer to Figure 5, which is a cross-sectional view taken along line BB in Figure 3. In one embodiment, the protrusion 122 has a first sidewall 1222 facing the outer periphery of the battery cell and a first end surface 1223 facing the bottom of the battery cell. A chamfer 1221 is provided at the junction between the first sidewall 1222 and the first end surface 1223.

[0048] It can be understood that the top of the battery cell is the end where the pole 021 is provided, and the bottom of the battery cell is the end of the battery cell away from the pole 021.

[0049] Exemplarily, the chamfer 1221 is a rounded corner.

[0050] In this embodiment, by providing a chamfer 1221 at the connection between the first side wall 1222 and the first end face 12223, the chamfer 1221 can be used to guide the installation of the CCS bracket 001 when the CCS bracket 001 is positioned and matched with the battery cell, thereby improving the smoothness of the installation of the CCS bracket 001 and ultimately improving the assembly efficiency of the CCS bracket 001 and the battery cell.

[0051] In one embodiment, the first bracket 011 has a first side 116 and a second side 117 opposite to each other. The first side 116 is configured to mount electrical components of the CCS assembly, while the second side 117 contacts the second bracket 012.

[0052] It can be understood that the battery cell is located on the side of the second bracket 012 facing away from the first bracket 011 .

[0053] Compared to the structure in which the second bracket 012 is located on the first side 116 of the first bracket 011, in this embodiment, the above arrangement reduces the distance between the electrodes of the battery cell and the first side, thereby reducing the height difference between the end of the busbar connected to the first bracket 011 and the end of the busbar electrically connected to the battery cell, thereby reducing the bending dimension of the busbar. This reduces the rebound force of the busbar after bending, which helps to improve the stability of the electrical connection between the busbar and the battery cell.

[0054] In one embodiment, the second bracket 012 is connected to the first bracket 011 by heat riveting.

[0055] It can be understood that one of the second bracket 012 and the first bracket 011 is provided with a first hot rivet column 123, and the other is provided with a hot rivet through hole 111. The first hot rivet column 123 is inserted into the hot rivet through hole 111, and the hot rivet structure is heated and melted by the hot riveting machine 111, so that the melted hot rivet structure is bonded to the other. The melted hot rivet structure is solidified to fix the second bracket 012 to the first bracket 011.

[0056] For example, the second bracket 012 is provided with a first heat-riveted stud 123, as shown in FIG6 , which is a schematic structural diagram of the second bracket 012 from another perspective according to an embodiment of the present application. The first bracket 011 is provided with a heat-riveted through-hole 111. The end of the first heat-riveted stud 123 facing away from the second bracket 012 passes through the heat-riveted through-hole 111 and is then heat-riveted to the first bracket 011, as shown in FIG7 , which is a schematic structural diagram of the bracket from another perspective according to an embodiment of the present application.

[0057] During the hot riveting process, the end of the first hot riveting stud 123 facing away from the second bracket 012 is first heated and melted by a hot riveting machine. The end of the first hot riveting stud 123 facing away from the second bracket 012 is then pressed to expand the end thereof so as to engage with the hot riveting through hole 111, thereby preventing the first bracket 011 and the second bracket 012 from separating from each other.

[0058] In this embodiment, by heat-riveting the second bracket 012 to the first bracket 011, the connection strength between the second bracket 012 and the first bracket 011 can be improved, thereby improving the stability of the connection between the second bracket 012 and the first bracket 011. In addition, heat-riveting is fast and easy to operate, making it suitable for mass production.

[0059] 2 and 8 , FIG8 is a schematic diagram of the structure of the first bracket 011 provided in an embodiment of the present application. In one embodiment, the first bracket 011 is provided with a mounting groove 112 . The second bracket 012 is embedded in the mounting groove 112 .

[0060] It can be understood that since the second bracket 012 is embedded in the installation groove 112 , the connecting through hole 115 is provided at the bottom of the installation groove 112 and at a position opposite to the positioning hole 121 .

[0061] In this embodiment, by embedding the second bracket 012 in the installation groove 112 on the first bracket 011, the matching surface between the first bracket 011 and the second bracket 012 can be increased, thereby increasing the relative position accuracy between the first bracket 011 and the second bracket 012, and ultimately improving the position accuracy of the CCS component relative to the battery cell.

[0062] In one embodiment, the length of the first bracket 011 is greater than the length of the second bracket 012 ; the second bracket 012 is located in the middle of the length direction of the first bracket 011 .

[0063] It can be understood that the length direction of the first bracket 011 is parallel to the arrangement direction of the battery cells, and the second bracket 012 is located in the middle of the length direction of the first bracket 011, so that the second bracket 012 is opposite to the middle battery cell of the battery cell row.

[0064] In this embodiment, through the above-mentioned arrangement, on the one hand, the second bracket 012 can be arranged only at the position where the CCS bracket 001 and the battery cell are positioned, thereby effectively controlling the material cost of the CCS bracket 001; on the other hand, since the position tolerance gradually accumulates in the direction away from the second bracket 012, arranging the second bracket 012 in the middle of the first bracket 011 can make the position accuracy of the two ends of the first bracket 011 consistent, thereby making the accumulated position tolerance at the two ends of the first bracket 011 smaller, thereby improving the installation position accuracy of the CCS component, and making the force on the CCS bracket 001 symmetrical, which is beneficial to the arrangement of the CCS bracket 001.

[0065] Referring to Figure 3, in one embodiment, the second bracket 012 is provided with heat dissipation holes and / or weight reduction holes. Specifically, the second bracket 012 is provided with a through-hole group configured for heat dissipation and / or weight reduction. Optionally, the through-hole group includes a plurality of strip-shaped holes 125. The through-hole group facilitates heat dissipation from the battery and reduces the weight of the second bracket 012.

[0066] For example, when there are two positioning holes 121, the plurality of strip-shaped holes 125 in the through-hole group are divided into four groups. A main through-hole 124 is provided on the second bracket 012. Along the first direction, a positioning hole 121, a first group of strip-shaped holes, a main through-hole 124, a second group of strip-shaped holes, and another positioning hole 121 are arranged in this order. Along the second direction, a third group of strip-shaped holes and a fourth group of strip-shaped holes are located on either side of the main through-hole 124, respectively. The first and second directions are perpendicular to each other and are both perpendicular to the axial direction of the battery cell. The first direction is the length of the first bracket 011.

[0067] Please refer to Figures 10 and 11. Figure 10 is a schematic diagram of the structure of a CCS assembly 003 provided in an embodiment of the present application, and Figure 11 is an enlarged view of point D in Figure 10. Accordingly, an embodiment of the present application provides a CCS assembly 003 comprising a busbar 031, a collection component 032, and the aforementioned CCS bracket 001. Busbar 031 is mounted on first bracket 011. Collection component 032 is electrically connected to busbar 031.

[0068] As can be understood, one end of the collector 032 is electrically connected to the busbar 031, and the other end is electrically connected to the PCBA, thereby transmitting the collected cell voltage and other signals to the PCBA. The collector 032 can be mounted on the first bracket 011 to improve its stability relative to the first bracket 011.

[0069] Exemplarily, a bus positioning groove 113 is provided on the first bracket 011, a second thermal rivet column 114 is provided in the bus positioning groove 113, the bus 031 is provided in the bus positioning groove 113, and the second thermal rivet column 114 passes through the bus and is thermally riveted to the bus 031, thereby fixing the bus 031 on the first bracket 011.

[0070] In this embodiment, the CCS component 003 adopts the above-mentioned CCS bracket 001 to increase the strength of the part where the CCS bracket 001 is positioned and matched with the battery cell, thereby improving the rigidity of the part where the CCS bracket 001 is positioned and matched with the battery cell, which is beneficial to the positioning of the CCS bracket 001 relative to the battery cell, and ultimately can improve the installation position accuracy of the CCS component 003.

[0071] Accordingly, embodiments of the present application further provide a battery module comprising a battery cell and the aforementioned CCS assembly 003. The battery cell cooperates with the positioning structure and is electrically connected to the busbar 031. The battery cell's pole cooperates with the positioning structure and extends to abut against the busbar 031. Specifically, the battery cell's pole passes through the positioning hole 121 and is electrically connected to the busbar 031 located in the busbar positioning groove 113.

[0072] The distance between the positioning structure and the outer peripheral surface of the battery cell is d, which satisfies 0≤d≤1mm.

[0073] It is understood that the distance between the positioning structure and the outer circumference of the battery cell is specifically the distance between the protrusion 122 and the outer circumference of the battery cell. As shown in Figure 9, which is an enlarged view of point A in Figure 4, the distance d includes but is not limited to 0, 0.2 mm, 0.3 mm, 0.5 mm, 0.7 mm, 0.8 mm, and 1 mm.

[0074] In this embodiment, by limiting the distance d between the positioning structure and the outer peripheral surface of the battery cell, on the one hand, it can avoid interference fit between the positioning structure and the outer peripheral surface of the battery cell, which may cause the second bracket 012 to be damaged due to the squeezing force from the battery cell; on the other hand, it can avoid excessive clearance between the positioning structure and the outer peripheral surface of the battery cell, which may cause the positioning accuracy of the CCS component 003 relative to the battery cell to be reduced.

Claims

1. A CCS bracket, the CCS bracket (001) comprising: A first bracket (011) configured to mount electrical components of the CCS assembly; A second bracket (012) connected to the first bracket (011), the second bracket (012) being provided with a positioning structure configured to position the first bracket (011) relative to the battery cell (002).

2. The CCS stent according to claim 1, wherein, The positioning structure includes a positioning hole (121) provided on the second bracket (012), the positioning hole (121) being configured to sleeve the battery cell (002).

3. The CCS bracket according to claim 2, wherein, A plurality of bumps (122) are provided on the hole wall of the positioning hole (121), and the plurality of bumps (122) are spaced along the circumferential direction of the positioning hole (121).

4. The CCS stent according to claim 3, wherein The bump (122) has a first side wall (1222) facing the outer peripheral surface of the battery cell (002) and a first end surface (1223) facing the bottom of the battery cell (002), and a chamfer (1221) is provided at the connection between the first side wall (1222) and the first end surface (1223).

5. The CCS stent according to claim 1, wherein, The first bracket (011) has a first side (116) and a second side (117) facing away from each other, the first side (116) being configured to mount electrical components of the CCS assembly, and the second side (117) being in contact with the second bracket (012).

6. The CCS stent according to any one of claims 1-5, wherein, One of the second bracket (012) and the first bracket (011) is provided with a first hot riveting post (123), and the other is provided with a hot riveting through hole (111), and the first hot riveting post (123) is inserted into the hot riveting through hole (111).

7. The CCS stent according to any one of claims 1-5, wherein, The first bracket (011) is provided with a mounting groove (112), and the second bracket (012) is embedded in the mounting groove (112).

8. The CCS stent according to any one of claims 1-5, wherein, The rigidity of the first bracket (011) is less than that of the second bracket (012).

9. The CCS stent according to claim 8, wherein, The first bracket (011) is a plastic suction bracket, the second bracket (012) is a plastic bracket, and the thickness of the plastic bracket is greater than that of the plastic suction bracket.

10. The CCS stent according to any one of claims 1-5, wherein, The first bracket (011) is a support bracket, and the second bracket (012) is a positioning bracket.

11. The CCS stent according to any one of claims 1-5, wherein, The length of the first bracket (011) is greater than that of the second bracket (012); the second bracket (012) is located in the middle of the length direction of the first bracket (011).

12. The CCS stent according to any one of claims 1-5, wherein, The second bracket (012) is provided with a through hole group configured to dissipate heat and / or reduce weight.

13. A CCS assembly, comprising: The CCS bracket (001) according to any one of claims 1-12; A bus bar (031) provided on the first bracket (011); A collecting member (032) electrically connected to the bus bar (031).

14. A battery module, comprising: The CCS bracket (001) according to claim 13; A battery cell (002) cooperating with the positioning structure, the battery cell (002) being electrically connected to the bus bar.

15. A battery module according to claim 14, wherein, The pole column (021) of the battery cell (002) cooperates with the positioning structure and extends to abut against the bus bar (031); the distance between the positioning structure and the outer peripheral surface of the pole column (021) is d, satisfying 0≤d≤1 mm.

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