CCS assembly and battery pack

Abstract

A CCS assembly and a battery pack. The CCS assembly comprises an insulating support (1), electrical connection assemblies (2), acquisition assemblies (3), and acquisition terminals (4). The insulating support (1) comprises a mating surface (11) opposite to battery cells and a free surface (12) opposite to the mating surface (11). The mating surface (11) is provided with first accommodating recesses (111), while the free surface (12) is provided with, offset with respect to the first accommodating recesses (111), second accommodating recesses (121) and exhaust recesses (122), communication ports (13) being provided between the first accommodating recesses (111) and the second accommodating recesses (121). The electrical connection assemblies (2) are disposed in the second accommodating recesses (121). The acquisition assemblies (3) are disposed in the first accommodating recesses (111). The acquisition terminals (4) are disposed in the communication ports (13), one end of each acquisition terminal (4) extending into a first accommodating recess (111) and being connected to an acquisition assembly (3), and the other end thereof extending into a second accommodating recess (121) and being connected to an electrical connection assembly (2).

Description

CCS assembly and battery pack

[0001] The present application claims priority to the Chinese patent application No. 202421148680.7, filed on May 23, 2024, to the Chinese Patent Office, the whole content of the above application being incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a CCS assembly and a battery pack. BACKGROUND

[0003] In the field of batteries, especially in application scenarios such as new energy vehicles, energy storage systems, and industrial equipment, the CCS assembly (Cells Contact System, integrated busbar) as a key component of the battery system, its stability and reliability are directly related to the performance and safety of the battery system. However, the design of the CCS assembly has obvious shortcomings in some aspects, especially in the layout of the sampling end and the sampling harness.

[0004] Currently, the sampling end in the battery system is usually arranged above the bar. This design is vulnerable to damage when facing external pressures such as vibration, impact, etc. that may occur during battery module assembly, transportation, or use. Such damage not only may cause the battery management system to be unable to accurately obtain battery state information, but also may affect the safety performance of the battery and the stability of the overall system. SUMMARY

[0005] In the design of the related art, the sampling harness is usually exposed or simply fixed above the insulating support, lacking sufficient protection. During the operation of the battery system, due to temperature changes, vibrations, and possible mechanical collisions, the sampling harness is easily damaged, leading to signal transmission interruption or distortion.

[0006] In a first aspect, the present application provides a CCS assembly. The CCS assembly comprises:

[0007] an insulating support, the insulating support comprising an adhering surface opposite to the electric core and a free surface opposite to the adhering surface, the adhering surface being provided with a first accommodating groove, the free surface being provided with a second accommodating groove and an exhaust groove arranged in a staggered manner with the first accommodating groove, and a communication port being arranged between the first accommodating groove and the second accommodating groove;

[0008] an electrical connection assembly, the electrical connection assembly being arranged in the second accommodating groove;

[0009] a collection assembly, the collection assembly being arranged in the first accommodating groove; and

[0010] The sampling terminal is arranged in the communication port, one end of the sampling terminal extends into the first accommodating groove and is connected with the collecting assembly, and the other end of the sampling terminal extends into the second accommodating groove and is connected with the electrical connection assembly.

[0011] In a second aspect, the application further provides a battery pack. The battery pack comprises a shell, a battery module and a CCS assembly arranged in the shell. The battery module comprises a plurality of linearly stacked battery cells. The abutting surface of the insulating support faces the battery cells. The battery cells comprise a pole and an explosion-proof valve. The exhaust groove is opposite the explosion-proof valve, and a plurality of through holes in communication with the explosion-proof valve are arranged in the exhaust groove. The second accommodating groove is opposite the pole, and a plurality of through holes in communication with the pole are arranged in the second accommodating groove. The inner walls of the second accommodating groove and the exhaust groove are both provided with assembly tables, and the assembly tables are assembled with protective layers, and the protective layers are aligned with the free surfaces. Advantages

[0012] The CCS assembly provided by the application is not directly arranged in a position easily subjected to pressure from the outside, but is ingeniously designed in the communication port of the insulating support. This design can effectively protect the sampling terminal from the direct action of pressure from the outside and reduce the risk of damage. In addition, the collecting assembly and the electrical connection assembly are arranged in the first accommodating groove and the second accommodating groove respectively. This layout not only makes the installation of the assemblies more stable, but also provides additional protection for the assemblies. During the assembly, transportation or use of the battery module, even if vibration or impact is encountered, the assemblies can remain relatively stable and safe due to the protection of the insulating support.

[0013] The battery pack provided by the application can accommodate and protect the electrical connection assembly and the collecting assembly by arranging the first accommodating groove and the second accommodating groove on the insulating support. The assembly tables are further assembled with protective layers, and the protective layers are aligned with the free surfaces. The design of the protective layers strengthens the protection of the CCS assembly and prevents direct damage to the internal structure of the assembly by external factors. BRIEF DESCRIPTION OF DRAWINGS

[0014] FIG. 1 is an exploded structural schematic view of the CCS assembly of the application;

[0015] FIG. 2 is an enlarged view of area A in FIG. 1;

[0016] FIG. 3 is a schematic view of the connection structure of the electrical connection assembly and the collecting assembly in some implementations of the application;

[0017] FIG. 4 is a schematic view of the front surface structure of the first gasket in some implementations of the application;

[0018] FIG. 5 is a schematic view of the back surface structure of the first gasket in some implementations of the application;

[0019] FIG. 6 is a schematic view of the second gasket structure in some implementations of the application;

[0020] Fig. 7 is a schematic diagram of a third bar structure according to some embodiments of the present application;

[0021] Fig. 8 is a schematic diagram of a fourth bar structure according to some embodiments of the present application;

[0022] Fig. 9 is a schematic diagram of an internal structure of a battery pack according to some embodiments of the present application;

[0023] Fig. 10 is an enlarged view of region B in Fig. 9.

[0024] Legend of reference signs:

[0025] 1, insulating support; 11, bonding surface; 111, first accommodating groove; 12, free surface; 121, second accommodating groove; 122, exhaust groove; 13, communication port; 2, electrical connection assembly; 21, first bar; 211, first bending portion; 212, first boss; 22, second bar; 221, second boss; 23, third bar; 231, third boss; 24, fourth bar; 241, fourth boss; 25, boss; 26, sampling sink groove; 27, sink groove opening; 28, welding observation hole; 3, collection assembly; 31, sampling cable; 32, sampling output pole; 4, sampling terminal; 5, assembly table; 6, protective layer; 7, shell; 8, battery module. Embodiments of the present application

[0026] Embodiment 1 of the present application is shown in Figs. 1-10, which discloses a CCS assembly configured to connect with each cell in a battery module 8, comprising an insulating support 1, an electrical connection assembly 2, a collection assembly 3 and a sampling terminal 4. The insulating support 1 comprises a bonding surface 11 opposite to the cell and a free surface 12 opposite to the bonding surface 11. The bonding surface 11 is provided with a first accommodating groove 111, and the free surface 12 is provided with a second accommodating groove 121 and an exhaust groove 122 disposed in a staggered manner with the first accommodating groove 111, so that the insulating support 1 forms a rectangular wave structure when viewed from the end. Specifically, the width direction of the battery module 8 is set as a first direction, and the length direction is set as a second direction, which is also the stacking direction of the cells. The whole of the stacked cells is a battery module. In the part of each battery module 8 corresponding to the insulating support 1, along the first direction, the insulating support 1 sequentially comprises the second accommodating groove 121, the first accommodating groove 111, the exhaust groove 122, the first accommodating groove 111 and the second accommodating groove 121 from one side to the other side. The second accommodating groove 121 is opposite to the pole of the cell, and the exhaust groove 122 is opposite to the explosion-proof valve of the cell. When there are multiple groups of battery modules 8, each battery module 8 is arranged along the width direction of itself to form a multi-column structure, and the number of the second accommodating groove 121, the first accommodating groove 111 and the exhaust groove 122 of the insulating support 1 also increases correspondingly.

[0027] In the technical solution of the present application, the sampling terminals 4 are no longer directly arranged at positions vulnerable to external pressure, but are ingeniously designed in the communication openings 13 of the insulating support 1. This design can effectively protect the sampling terminals 4 from the direct action of external pressure and reduce the risk of damage. In addition, the collection assembly 3 and the electrical connection assembly 2 are respectively arranged in the first accommodating groove 111 and the second accommodating groove 121. This layout not only makes the installation of the collection assembly 3 and the electrical connection assembly 2 more stable, but also provides additional protection for the collection assembly 3 and the electrical connection assembly 2. During the assembly, transportation or use of the battery module, even if vibration or impact is encountered, the collection assembly 3 and the electrical connection assembly 2 can remain relatively stable and safe due to the protection of the insulating support 1.

[0028] The collection assembly 3 includes a plurality of sampling cables 31 and a sampling output pole 32, the sampling output pole 32 is located at one end of the sampling cable 31, and a plurality of sampling terminals 4 are connected to the same side of the sampling cable 31 at intervals. The first accommodating groove 111 and the second accommodating groove 121 are provided with communication openings 13, the electrical connection assembly 2 is arranged in the second accommodating groove 121, the collection assembly 3 is arranged in the first accommodating groove 111, the sampling terminals 4 are arranged in the communication openings 13, and the sampling terminals 4 are arranged to communicate the electrical connection assembly 2 and the collection assembly 3. Specifically, one end of the sampling terminal 4 extends into the first accommodating groove 111 and connects the collection assembly 3, and the other end extends into the second accommodating groove 121 and connects the electrical connection assembly 2. The number of communication openings 13 is twice the number of battery cells, wherein through holes are provided between the first accommodating groove 111 and the battery cells, between the second accommodating groove 121 and the battery cells, and between the exhaust groove 122 and the battery cells to complete the structural adaptation with the battery cells. In this way, the sampling terminals 4 are no longer directly arranged at positions vulnerable to external pressure, but are ingeniously designed in the communication openings 13 of the insulating support 1. This design can effectively protect the sampling terminals 4 from the direct action of external pressure and reduce the risk of damage. In addition, the electrical connection assembly 2 and the collection assembly 3 are respectively arranged in the second accommodating groove 121 and the first accommodating groove 111. This layout not only makes the installation of the components more stable, but also provides additional protection for them. During the assembly, transportation or use of the battery module 8, even if vibration or impact is encountered, these components can remain relatively stable and safe due to the protection of the insulating support 1.

[0029] It should be noted that the acquisition assembly 3 includes a plurality of sampling cables 31 and a sampling output pole 32 located at one end of the sampling cable 31. This design enables the sampling signal to be effectively transmitted to the sampling output pole 32 through the sampling cable 31, and then received and processed by the battery management system or other related equipment. The use of the sampling cable 31 also ensures the stability and reliability of signal transmission, reducing errors caused by signal interference or attenuation. The plurality of sampling terminals 4 are connected at intervals on the same side of the sampling cable 31. This interval connection design can avoid signal interference between the sampling terminals 4, ensuring that each sampling terminal 4 can independently and accurately collect the state information of the battery cell. At the same time, the side connection of the sampling terminal 4 and the sampling cable 31 improves the space utilization, making the entire acquisition assembly 3 more compact and stable.

[0030] In this embodiment 1, the electrical connection assembly 2 includes a plurality of springs, each spring is provided with a boss 25 protruding away from the insulating support 1, so that the spring and the second receiving groove 121 form a sampling sink 26, one end of the sampling terminal 4 is connected in the sampling sink 26. Through the structure of the sampling sink 26, the connection stability between the sampling terminal 4 and the electrical connection assembly 2 is enhanced. Since the boss 25 protrudes away from the insulating support 1, the installation of the sampling terminal 4 in the sampling sink 26 is more secure and less susceptible to external pressure interference.

[0031] In this embodiment, the second receiving groove 121 is provided with a spring assembly hole 123 corresponding to each spring, which is beneficial to the assembly and fixation of the spring. Through the structure of the sampling sink 26, the connection stability between the sampling terminal 4 and the electrical connection assembly 2 is enhanced. The installation of the sampling terminal 4 in the sampling sink 26 is more secure and less susceptible to external pressure interference. One end of the sampling terminal 4 is connected in the sampling sink 26, which ensures good contact between the sampling terminal 4 and the electrical connection assembly 2. Through the fixing effect of the sampling sink 26, the sampling terminal 4 can maintain a stable connection state when subjected to external pressure, avoiding signal transmission problems caused by looseness or misalignment.

[0032] In some embodiments, the sampling sink groove 26 is arranged at the edge of the tab, and the sampling sink groove 26 penetrates through the edge of the tab to form a sink groove opening 27, the opening direction of the sink groove opening 27 is towards the communication port 13. By arranging the sampling sink groove 26 at the edge of the tab and designing the sink groove opening 27 corresponding to the communication port 13, the sampling terminal 4 can be more directly and efficiently connected with the electrical connection assembly 2. This layout reduces the path of signal transmission and potential interference, thereby improving the quality and efficiency of signal transmission. Secondly, the design of the sink groove opening 27 makes the sampling terminal 4 more convenient during installation and disassembly. Through the sink groove opening 27, the sampling terminal 4 can be more easily accessed and fixed, and subsequent maintenance and replacement operations are also facilitated. This design improves the maintainability and scalability of the assembly.

[0033] It should be noted that in the present embodiment 1, the plurality of tabs includes a first tab 21, a second tab 22, a third tab 23 and a fourth tab 24. In other embodiments, the first tab 21, the second tab 22, the third tab 23 and the fourth tab 24 can exist independently or be combined arbitrarily, which is not limited here.

[0034] Specifically, the first tab 21 is mainly distributed at the starting end or the terminal end of the battery module 8, and is arranged as an input or output connecting tab. Therefore, one side of the first tab 21 is bent to be provided with a first boss 212 and a first bending part 211. The first boss 212 protrudes between the first tab 21 and the first bending part 211 in a direction away from the insulating support 1, and the first bending part 211 is arranged as a total positive or negative electrode of the battery module 8. Assuming that the width direction of the battery module 8 is the first direction and the length direction is the second direction, the first boss 212 extends along the first direction, and the first bending part 211 is bent to be arranged in a direction close to the insulating support 1. The first boss 212 is located at the edge of the battery cell and plays a supporting role, thereby improving the strength and stability of the first tab 21.

[0035] The second tab 22 is mainly distributed in the battery module 8, and is arranged as a connecting tab connecting two groups of battery cells. Therefore, the second tab 22 is symmetrically provided with two sampling sink grooves 26 along the second direction, and two second bosses 221 along the first direction are arranged between the two sampling sink grooves 26. The second bosses 221 are respectively located at the edges of the two groups of battery cells and play a supporting role, thereby improving the strength and stability of the second tab 22. In the present embodiment, the second tab 22 is configured as a connecting tab to connect different battery modules 8.

[0036] The third busbar 23 is mainly distributed between the connecting pieces of the battery cell groups arranged in parallel along the first direction. The third busbar 23 is symmetrically provided with two sampling grooves 26 along the first direction, and a third boss 231 along the second direction is arranged between the two sampling grooves 26. The third boss 231 is located at the edge of the two battery cell groups and serves as a support to improve the strength and stability of the third busbar 23. In this embodiment, the third busbar 23 serves as a connecting busbar, and the third busbar 23 is configured to connect different battery cell rows.

[0037] The fourth busbar 24 is mainly distributed between every two stacked battery cells in the battery cell group. The fourth busbar 24 is symmetrically provided with two sampling grooves 26 along the second direction, and a fourth boss 241 along the first direction is arranged between the two sampling grooves 26. The fourth boss 241 is located at the edge of the two battery cells and serves as a support to improve the strength and stability of the fourth busbar 24.

[0038] In some embodiments, the first busbar 21, the second busbar 22, the third busbar 23, and the fourth busbar 24 are all provided with a welding observation hole 28, which is configured to observe the assembly position of the busbar and the battery cell pole.

[0039] Preferably, the sampling terminal 4 is inclined along the first direction so that the connection height between the sampling terminal 4 and the collection assembly 3 is higher than the connection height between the sampling terminal 4 and the electrical connection assembly 2. The inclined sampling terminal 4 along the first direction can ensure that the signal can be transmitted more directly and efficiently to the collection assembly 3 during sampling, saving the length of the sampling terminal 4. Since the connection height between the sampling terminal 4 and the collection assembly 3 is higher, the signal transmission path is relatively shorter, thereby reducing the possibility of signal attenuation and interference.

[0040] The application also relates to a battery pack, which comprises a shell 7, a battery module 8 and a CCS assembly located in the shell 7, the battery module 8 comprises a plurality of linearly stacked battery cells, the fitting surface of the insulating support 1 faces the battery cells, the battery cells comprise a pole and a relief valve, the exhaust groove 122 is opposite to the relief valve, a plurality of through holes communicated with the relief valve are arranged in the exhaust groove 122, the second containing groove 121 is opposite to the pole, a plurality of through holes communicated with the pole are arranged in the second containing groove 121, the inner walls of the second containing groove 121 and the exhaust groove 122 are both provided with the assembly table 5, the assembly table 5 is assembled with the protective layer 6, the protective layer 6 is aligned with the free surface 12, the first containing groove 111 and the second containing groove 121 arranged on the insulating support 1 can contain and protect the electric connection assembly 2 and the collection assembly 3, the assembly table 5 is also assembled with the protective layer 6 and is aligned with the free surface 12. The design of the protective layer 6 strengthens the protection of the CCS assembly and prevents the direct damage of external factors to the internal structure of the assembly. Meanwhile, the protective layer 6 and the exhaust groove 122 form a pressure relief channel, high-temperature and high-pressure gas can be discharged from both ends of the exhaust groove 122 to realize pressure relief operation; when the battery module 8 is provided with a plurality of groups, the two adjacent second containing grooves 121 can be combined to assemble one protective layer 6, thereby improving the assembly efficiency. The inclined arrangement of the sampling terminal 4 along the first direction can also avoid the protective layer 6 and avoid affecting the assembly of the protective layer 6.

[0041] In conclusion, the CCS assembly and the battery pack provided by the application have the following technical effects:

[0042] 1. The first containing groove 111 containing the collection assembly 3 and the second containing groove 121 containing the electric connection assembly 2 arranged on the insulating support 1 provide a good working space for the collection assembly 3 and the electric connection assembly 2, which can resist external vibration, impact and other adverse factors and protect the internal electric connection assembly 2 and the collection assembly 3 from being damaged;

[0043] 2. The communication port 13 arranged between the first containing groove 111 and the second containing groove 121 makes the sampling terminal 4 easier to be connected and fixed and facilitates subsequent maintenance and replacement operation; the communication port 13 is located in a hidden position, the internal sampling terminal 4 can be protected from being damaged and can accurately and quickly collect the state information of the battery module 8, thereby providing reliable data support for the battery management system and ensuring the normal operation and safety performance of the battery pack;

[0044] 3. The design of the CCS assembly fully considers the safety requirements of the battery module 8, the layout and structure of the sampling terminal 4 and the electric connection assembly 2 are optimized, and the safety risks caused by poor contact or short circuit are reduced.

Claims

1. A CCS assembly configured to be connected with each battery cell in a battery module (8), comprising: an insulating support (1) comprising a fitting surface (11) opposite to the battery cell and a free surface (12) opposite to the fitting surface (11), the fitting surface (11) being provided with a first accommodating groove (111), the free surface (12) being provided with a second accommodating groove (121) and an exhaust groove (122) disposed in a staggered manner with the first accommodating groove (111), and a communication port (13) being disposed between the first accommodating groove (111) and the second accommodating groove (121); an electrical connection assembly (2) disposed in the second accommodating groove (121); a collection assembly (3) disposed in the first accommodating groove (111); and a sampling terminal (4) disposed in the communication port (13), one end of the sampling terminal (4) extending into the first accommodating groove (111) and connected with the collection assembly (3), and the other end extending into the second accommodating groove (121) and connected with the electrical connection assembly (2). The electrical connection assembly (2) comprises a plurality of O-rings, and the second accommodating groove (121) is provided with an O-ring assembly hole (123) corresponding to each O-ring, and the O-ring is provided with a sampling sink (26) on the side close to the insulating support (1), and one end of the sampling terminal (4) is connected in the sampling sink (26). The O-ring is provided with a boss (25) protruding away from the insulating support (1) to form the sampling sink (26) between the O-ring and the second accommodating groove (121). The sampling sink (26) is arranged at the edge of the O-ring, and the sampling sink (26) penetrates the edge of the O-ring to form a sink opening (27), and the opening direction of the sink opening (27) is towards the communication port (13). The O-ring comprises a first O-ring (21), and one side of the first O-ring (21) is provided with a first boss (212) and a first bending part (211), the first boss (212) protrudes between the first O-ring (21) and the first bending part (211) away from the insulating support (1), and the first boss (212) extends in a first direction, and the first bending part (211) is arranged in a bending manner close to the insulating support (1).

2. A CCS assembly according to claim 1, wherein, The first O-ring (21) is arranged at the starting end or the terminal end of the battery module (8), and the first O-ring (21) is configured as an output pole connecting piece or an input pole connecting piece.

3. A CCS assembly according to claim 2, wherein, The O-ring comprises a second O-ring (22), and the second O-ring (22) is symmetrically provided with two sampling sinks (26) in a second direction, and two second bosses (221) in the first direction are arranged between the two sampling sinks (26).

4. A CCS assembly according to claim 2, wherein, The second O-ring (22) is arranged between two adjacent groups of battery cells arranged in the second direction in the battery module (8), and the second O-ring (22) is configured to be connected between the two groups of battery cells in the second direction.

5. A CCS assembly according to any one of claims 2 to 4 wherein, ​ 6. A CCS assembly according to claim 5, wherein, ​ 7. A CCS assembly according to any one of claims 2 to 4, wherein, ​ 8. A CCS assembly according to claim 7, wherein, ​ 9. A CCS assembly according to any one of claims 2 to 4 wherein, The wafers include a third wafer (23) provided with two sampling grooves (26) symmetrically along a first direction, and a third boss (231) along a second direction is arranged between the two sampling grooves (26).

10. A CCS assembly according to claim 9, wherein, The third wafer (23) is arranged between two adjacent groups of battery cells arranged along the first direction in the battery module (8), and the third wafer (23) is configured to connect the two groups of battery cells along the first direction.

11. A CCS assembly according to any one of claims 2 to 4, wherein, The wafers include a fourth wafer (24) provided with two sampling grooves (26) symmetrically along a second direction, and a fourth boss (241) along a first direction is arranged between the two sampling grooves (26).

12. A CCS assembly according to claim 11, wherein, The fourth wafer (24) is arranged between two adjacent battery cells arranged along the second direction, and the fourth wafer (24) is configured to connect the two battery cells.

13. A CCS assembly according to any one of claims 1 to 4, wherein, The sampling terminals (4) are arranged obliquely along a first direction, and the connection height between the sampling terminals (4) and the collection assembly (3) is higher than the connection height between the sampling terminals (4) and the electrical connection assembly (2).

14. A CCS assembly according to any one of claims 1 to 4, wherein, The collection assembly (3) includes a plurality of sampling cables (31) and a sampling output pole (32), the sampling output pole (32) is located at one end of the sampling cable (31), and a plurality of sampling terminals (4) are connected at the same side of the sampling cable (31).

15. A battery pack comprising a shell (7), a battery module (8), and a CCS assembly as claimed in any one of claims 1-14 located in the shell (7).

16. The battery pack of claim 15, wherein, The battery module (8) includes a plurality of linearly stacked battery cells, the fitting surface of the insulating support (1) faces the battery cells, the battery cells include a pole and an explosion-proof valve, the exhaust groove (122) is opposite to the explosion-proof valve, a plurality of through holes in communication with the explosion-proof valve are arranged in the exhaust groove (122), the second accommodating groove (121) is opposite to the pole, a plurality of through holes in communication with the pole are arranged in the second accommodating groove (121), the second accommodating groove (121) and the inner wall of the exhaust groove (122) are provided with assembly tables (5) on both sides, the assembly tables (5) are assembled with protective layers (6), and the protective layers (6) are aligned with the free surfaces (12).

Images