Battery pack

Abstract

Battery pack, including: a battery module (1), a CCS detection component (2) for a battery contact system, wherein the CCS detection component (2) comprises a busbar (21), a detection wiring harness (22) and a first foam (23), wherein the busbar (21) is configured to be connected to the battery module (1), wherein the detection wiring harness (22) is connected to the busbar (21), wherein the first foam (23) is arranged on the battery module (1), wherein the first foam (23) comprises a body part (231) and a first connection section (232), wherein the body part (231) has a first connection port (233) corresponding to an explosion-proof valve of each battery cell in the battery module (1), wherein the first connection section (232) is provided in the first connection port (233), and wherein the first connection section (232) has a connection end (2321) connected to a chamber wall of the first connection port (233).and has a free end (2322) spaced from the chamber wall of the first connection port (233), wherein the free end (2322) is configured to rotate along the connection end (2321) to buffer and absorb the electrolyte sprayed from the explosion-proof valve.

Description

[0001] This application claims priority from a Chinese patent application filed on August 8, 2024, with the Chinese Patent Office under application number 202421927529.3, the entire contents of which are incorporated into this application by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, for example a battery pack. STATE OF THE ART

[0003] In the event of thermal runaway, the battery will quickly release the electrical energy and chemical energy stored within it, causing the internal electrolyte and chemical substances to rapidly decompose and generate a large amount of gas, which in turn causes the internal pressure of the battery to rise sharply. To ensure the safe use of new energy vehicles, signals are transmitted between the battery and the battery management system in the battery module for new energy vehicles through the signal sensing component of a battery contact system (CCS). To prevent the pressure on the inner wall of the battery from becoming too high and causing an explosion, the battery is often equipped with an explosion-proof battery valve set to release the pressure. DISCLOSURE OF THE UTILITY MODELTechnical problems

[0004] However, when assembling the batteries into a battery module, the explosion-proof valve is exposed. Therefore, if a battery is subjected to thermal runaway, the high-temperature electrolyte released after the explosion of the explosion-proof valve will affect neighboring batteries and may reach the CCS signal sensing component, affecting the use of the entire CCS signal sensing component and posing safety risks when using the battery module. Technical solutions

[0005] The present application provides a battery pack with a simple structure and the ability to absorb an electrolyte through the first foam to ensure the safety of use of the CCS component and the battery pack as a whole.

[0006] A battery pack is provided, comprising a battery module and a CCS sensing component, wherein the CCS sensing component comprises a bus bar, a sensing harness, and a first foam, wherein the bus bar is configured for connection to the battery module, wherein the sensing harness is connected to the bus bar, wherein the first foam is arranged on the battery module, wherein the first foam comprises a body part and a first connecting portion, wherein the body part has a first connecting terminal corresponding to the explosion-proof valve of each battery cell in the battery module, wherein the first connecting portion is provided in the first connecting terminal, and wherein the first connecting portion has a connecting end connected to a chamber wall of the first connecting terminal and a free end spaced from the chamber wall of the first connecting terminal,wherein the free end is configured to rotate along the connecting end to buffer and absorb the electrolyte sprayed from the explosion-proof valve. Beneficial effects

[0007] The advantageous effect of the present application is that by disposing the first foam, the electrolyte leaking from the explosion-proof battery valve in the battery module can be blocked and absorbed to a certain extent, thereby reducing the occurrence of electrolyte splashing from individual batteries to other adjacent batteries that affects normal use, and the effects of electrolyte leakage on CCS sensing components such as corrosion can be reduced, thereby better protecting electrical components and improving the safety of use of the CCS sensing component and the entire battery module;the free end is spaced from the chamber wall of the first connection terminal and can rotate along the connection end, so that the free end can rotate around the connection end under the influence of the electrolyte at the moment of explosion of the explosion-proof valve, the free end blocking, buffering and absorbing the electrolyte sprayed during the rotation, thereby reducing the occurrence of electrolyte splashing onto other batteries.; REPRESENTATION OF THE UTILITY MODEL Fig. 1 is a schematic structural diagram of a battery pack provided by an embodiment of the present application; Fig. 2 is a schematic structural diagram of another battery pack provided by an embodiment of the present application; Fig. 3 is a schematic structural diagram of a CCS sensing component provided by an embodiment of the present application; Fig. 4 is an enlarged view at point A of Fig. 3; Fig. 5 is an enlarged view at point B of Fig. 4.

[0008] In the drawings: 1. Battery module; 11. Battery cell; 2. CCS sensing component; 21. Bus bar; 211. Glue groove; 22. Sensing harness; 221. Connector; 222. Bus wire; 2221. Main body section; 2222. Sensing section; 223. Bus terminal; 23. First foam; 231. Body part; 232. First connection section; 2321. Connection end; 2322. Free end; 233. First connection terminal; 24. Fixing plate; 241. Second connection terminal; 242. Cable binding hole; 243. Fourth connection terminal; 25. Second foam; 251. Third connection terminal. CONCRETE EMBODIMENTS

[0009] The present application is described below in conjunction with the accompanying drawings and exemplary embodiments. The specific exemplary embodiments described herein serve to illustrate the present application, but not to limit the present application. Furthermore, it should be noted that, for the sake of simplicity of description, some structures related to the present application are shown in the drawings, but not all structures.

[0010] When describing the present application, it should be noted that, unless otherwise specified and limited, the terms "attachment," "connection," and "fastening" are to be understood broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical or electrical connection; it may be a direct connection or an indirect connection via an intermediate medium; and it may be an internal communication between two elements or an interrelationship between two elements. One of ordinary skill in the art can understand the meanings of the above terms in the present application according to situations.

[0011] In the present application, the first feature being "above" or "below" the second feature may include that the first feature and the second feature are in direct contact, and may also include that the first feature and the second feature are not in direct contact but are in contact through another feature between them, unless clearly stated and limited otherwise. Furthermore, the first feature being "above," "on," and "above" the second feature may include that the first feature is directly above and diagonally above the second feature, or may mean that the first feature has a higher plane than the second feature. The first feature being "below," "below," and "down" the second feature may include that the first feature is directly below and diagonally below the second feature, or may mean that the first feature has a smaller plane than the second feature.

[0012] In describing the present embodiment, the terms "top," "bottom," "right," and similar orientations or positional relationships may be the orientations or positional relationships shown based on the drawings and are used only for convenience of description and ease of operation, rather than indicating or implying that the device or element mentioned must have a particular orientation or be constructed and operated in a particular orientation. Therefore, they should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used for differentiation in the description and have no particular meaning.

[0013] As in the Fig. 1 to 5, the battery pack according to the embodiments of the present application comprises a battery module 1 and a CCS sensing component 2, wherein the CCS sensing component 2 comprises a bus bar 21, a sensing wiring harness 22 and a first foam 23, wherein the bus bar 21 is adapted for connection to the battery module 1, wherein the sensing wiring harness 22 is connected to the bus bar 21, wherein the first foam 23 is arranged on the battery module 1 and is adapted to absorb the electrolyte escaping from the explosion-proof valve of the battery cell 11 in the battery module 1.By disposing the first foam 23, the electrolyte leaking from the explosion-proof valve of the battery cell 11 can be blocked and absorbed to a certain extent, thereby reducing the occurrence of electrolyte splashing from individual battery cells 11 to other adjacent battery cells 11 that affects normal use, and reducing the effects of electrolyte leakage on CCS sensing component 2 such as corrosion, thereby better protecting electrical components and improving the safety of use of the CCS sensing component 2 and the entire battery module 1.The first foam 23 comprises a body part 231 and a first connecting portion 232, wherein the body part 231 has a first connecting port 233 corresponding to the explosion-proof valve of each battery cell 11 in the battery module 1, wherein the first connecting portion 232 is provided in the first connecting port 233, and wherein the first connecting portion 232 has a connecting end 2321 connected to a chamber wall of the first connecting port 233 and a free end 2322 spaced from the chamber wall of the first connecting port 233, wherein the free end 2322 can rotate along the connecting end 2321, driven by the electrolyte sprayed from the explosion-proof valve.For example, the length of the first connecting portion 232 extends along a first direction (the first direction is the X direction in the figure), wherein one end of the first connecting portion 232 is connected along the first direction to the chamber wall of the first connecting port 233, wherein both sides of the first connecting portion 232 are spaced apart from the chamber wall of the first connecting port 233 along the second direction (the second direction is the Y direction in the figure), iethe connection state between the first connection portion 232 and the body part 231 can be maintained, and the free end 2322 can rotate around the connection end 2321 under the influence of the electrolyte at the moment the explosion-proof valve explodes, that is, the first connection portion 232 blocks, buffers, and absorbs the sprayed electrolyte during the rotation around the connection end 2321, thereby reducing the occurrence of electrolyte splashing to other battery cells 11.

[0014] The battery pack further comprises a case and a case cover, wherein the case is provided with a receiving groove, wherein the battery module 1 is installed in the receiving groove and the case cover is configured to close the groove opening of the receiving groove, wherein the first foam 23 is arranged between the battery module 1 and the case cover, wherein the first foam 23 can support the case cover and reduce the wobble of the case cover, and wherein the first foam 23 has a certain elasticity, so that the support of the case cover by the first foam 23 does not cause the case cover to lie down or lift up, and the supporting effect is good.

[0015] At least the first connecting portion 232 is separated from the battery module 1 by an escape area, and the escape area serves as a detonation space for the explosion-proof valve. The arrangement of the escape area prevents the first connecting portion 232 from blocking the explosion-proof valve and hindering the explosion of the explosion-proof valve, effectively improving the safety of using the battery cell 11.

[0016] In some embodiments, as in the Fig. 1, Fig. 2 and Fig. 3, it is provided that the CCS sensing component 2 also includes a fixing plate 24, wherein the bus bar 21 is arranged on the fixing plate 24, wherein the fixing plate 24 is provided with a second connection port 241 corresponding to the explosion-proof valve of each battery cell 11, wherein the first foam 23 is arranged on the side of the fixing plate 24 facing away from the battery module 1 and closes the second connection port 241. The fixing plate 24 may adopt an insulating PC plate structure, wherein the arrangement of the fixing plate 24 can enhance the installation strength of each bus bar 21 and the fixing plate 24, thereby ensuring the connection strength of the CCS sensing component 2 and the battery module 1.In other embodiments, the busbar 21 may also be pre-mounted on the mounting plate 24 and then the mounting plate 24 may be positioned on the battery module 1, whereby all busbars 21 and each battery cell of the battery module 1 can be mounted in alignment, thereby improving the installation convenience of the CCS sensing component 2.

[0017] In addition, as in the Fig. 1, Fig. 2 and Fig. 3, the first foam 23 is arranged on the side of the fixing plate 24 facing away from the battery module 1, that is, the first foam 23 is arranged between the fixing plate 24 and a housing cover, whereby the support between the fixing plate 24 and the housing cover can be effectively improved, and wherein the first connecting portion 232 is blocked by the housing cover when it is folded over under the influence of the electrolyte, so that the first connecting portion 232 can still absorb and buffer the electrolyte under the influence of the electrolyte, thereby preventing the first connecting portion 232 from being completely turned over, causing the electrolyte to splash onto the housing cover and flow to other battery cells 11.In addition, the arrangement of the second connection port 241 can provide an escape space for the explosion of the explosion-proof valve, thereby improving the safety of using the explosion-proof valve.

[0018] The CCS sensing component 2 also includes a second foam 25, wherein the second foam 25 is arranged between the mounting plate 24 and the battery module 1, and wherein the second foam 25 is provided with a third connection port 251 corresponding to the explosion-proof valve of each battery cell 11, the third connection port 251 being connected to the second connection port 241. By arranging the second foam 25, it can, on the one hand, reinforce the connection support between the battery module 1 and the mounting plate 24 and, on the other hand, absorb the electrolyte leaking from the battery cell 11, thereby preventing electrolyte leakage from affecting other battery cells 11 or the CCS sensing component 2 and reducing the risk of thermal runaway of the battery pack.

[0019] The CCS sensing component 2 further includes a cable tying component, and the length of the sensing wire harness 22 extends along the first direction, wherein the mounting plate 24 is provided with a plurality of sets of wire tying hole groups provided spaced apart along the first direction, wherein each of the sets of wire tying hole groups includes at least two wire tying holes 242 provided spaced apart along the second direction, wherein the cable tying component is configured to bundle the sensing wire harness 22 between two wire tying holes 242 in each of the sets of wire tying hole groups, wherein the first direction and the second direction are arranged at an angle.In the present embodiment, it is provided that each of the sets of cable binding hole groups includes two cable binding holes 242 provided spaced apart from each other along the second direction, wherein the cable binding component can be directly made of cable ties, with one cable tie passing through the two cable binding holes 242 to bundle the detection wire harness 22 on the mounting plate 24 and thus improve the connection strength of the detection wire harness 22.

[0020] The fixing plate 24 is provided with a fourth connection terminal 243 corresponding to a tab of each battery cell 11 in the battery module 1, and a part of the bus bar 21 can pass through the fourth connection terminal 243 to connect to the tab. The arrangement of the fourth connection terminal 243 facilitates the connection between the bus bar 21 and the tab of the battery cell 11. A side of the fixing plate 24 facing the bus bar 21 is provided with a positioning groove, and a side of the bus bar 21 facing the fixing plate 24 is provided with a protruding positioning portion, and the positioning portion is inserted into the positioning groove. The mating connection between the positioning portion and the positioning groove can effectively improve the connection accuracy of the bus bar 21 and the fixing plate 24.Furthermore, the positioning portion is not limited to a side of the busbar 21 facing the fixing plate 24, wherein the positioning groove is provided on a side of the fixing plate 24 facing the busbar 21, wherein the positioning portion may also be provided on the side of the fixing plate 24 facing the busbar 21, wherein the positioning groove may be provided on the side of the busbar 21 facing the fixing plate 24.

[0021] In further embodiments, as in the Fig. 3 and Fig. 4, it is provided that the detection harness 22 comprises at least one connector 221, each connector 221 being connected to a group of bus wires 222, each group of bus wires 222 comprising a plurality of bus wires 222 arranged in a row, and one end of each bus wire 222 is connected to the connector 221, and at the other end there is provided a bus terminal 223 which is connected to the bus bar 21.At one end of the detection harness 22, a connector 221 is provided with a plurality of flush interfaces so that all the bus wires 222 connected thereto remain in a flat state, and a plurality of bus wires 222 have different lengths and fit side by side, and all the bus terminals are evenly arranged on one side of the detection harness 22. This side by side arrangement of the wires facilitates maintenance of the detection harness 22, and the configuration is based on bus wires 222 without having to introduce new structures, and the economic benefits are relatively high.

[0022] In the present embodiment, the battery module 1 comprises a plurality of battery cells 11 arranged along the first direction, each battery cell 11 comprising two tabs spaced apart along a second direction. That is, the CCS sensing component 2 is provided with two rows of busbars 21 arranged along the second direction. Therefore, the sensing harness 22 comprises two connectors 221 spaced apart along the second direction, and each connector 221 is connected to the bus terminal 223 via a bus wire 222 and connects the same row of busbars 21, thereby reducing the tangling of the bus wire 222.

[0023] As in Fig.4, the bus wire 222 includes a main body 2221, a detection portion 2222, and a second connection portion, the main body 2221 being connected to the connector 221, the detection portion 2222 being connected to the bus terminal 223, and the detection portion 2222 being connected to the main body 2221 via the second connection portion, the length of the main body 2221 extending along the first direction and the length of the detection portion 2222 extending along the second direction, the first direction being perpendicular to the second direction.By vertically arranging the main body 2221 and the detection portion 2222, it is possible to ensure that the length of the bus wire 222 from the bus terminal 223 to the connector 221 is the longest, which allows the bus wire 222 to withstand the pulling of the bus wire 222 caused by the expansion of the battery cell 11, thereby preventing the bus wire 222 from being pulled and causing the bus terminal 223 to fall off, thereby improving the safety of using the detection harness 22. The shorter the length of the second connecting portion, the longer the length of the bus wire 222 required between the bus terminal 223 and the connector 221.

[0024] A glue groove 211 is recessed in the busbar 21, and the bus terminal 223 is inserted into the glue groove 211. By cooperatively arranging the bus terminal 223 and the glue groove 211, the injection position accuracy of the thermally conductive adhesive when the bus terminal 223 is connected to the fixing plate 24 can be improved, and at the same time, the amount of injected thermally conductive adhesive is reduced, that is, the spreading of the thermally conductive adhesive is reduced, and the connection strength and installation position accuracy of the bus terminal 223 and the fixing plate 24 are improved. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 202421927529.3

[0001]

Claims

[1] Battery pack comprising: a battery module (1), a CCS sensing component (2) for a battery contact system, wherein the CCS sensing component (2) comprises a busbar (21), a sensing wiring harness (22) and a first foam (23), wherein the busbar (21) is configured to be connected to the battery module (1), wherein the sensing wiring harness (22) is connected to the busbar (21), wherein the first foam (23) is arranged on the battery module (1), wherein the first foam (23) comprises a body part (231) and a first connecting section (232), wherein the body part (231) has a first connecting terminal (233) corresponding to an explosion-proof valve of each battery cell in the battery module (1), wherein the first connecting section (232) is provided in the first connecting terminal (233), and wherein the first connecting section (232) has a connecting end (2321) connected to a chamber wall of the first connecting terminal (233) is,and a free end (2322) spaced from the chamber wall of the first connection port (233), the free end (2322) being configured to rotate along the connection end (2321) to buffer and absorb the electrolyte sprayed from the explosion-proof valve. [2] The battery pack according to claim 1, wherein the first connecting portion (232) is formed with an escape area at a distance from the battery module (1). [3] Battery pack according to claim 1 or 2, wherein the CCS detection component (2) also comprises a mounting plate (24), wherein the busbar (21) is arranged on the mounting plate (24), wherein the mounting plate (24) is provided with a second connection port (241) corresponding to the explosion-proof valve of each battery cell, wherein the first foam (23) is arranged on the side of the mounting plate (24) facing away from the battery module (1) and closes the second connection port (241). [4] The battery pack according to claim 3, wherein the CCS sensing component (2) also comprises a second foam (25), wherein the second foam (25) is arranged between the fixing plate (24) and the battery module (1), and wherein the second foam (25) is provided with a third connection terminal (251) corresponding to the explosion-proof valve of each battery cell, the third connection terminal (251) being connected to the second connection terminal (241). [5] The battery pack according to claim 3 or 4, wherein the CCS sensing component (2) also comprises a cable tying component, wherein the length of the sensing wire harness (22) extends along a first direction, wherein the fixing plate (24) is provided with a plurality of sets of cable tying hole groups provided spaced apart along the first direction, wherein each of the sets of cable tying hole groups comprises at least two cable tying holes (242) provided spaced apart along a second direction, wherein the cable tying component is configured to bundle the sensing wire harness (22) between two cable tying holes in each of the sets of cable tying hole groups, wherein the first direction and the second direction are arranged at an angle. [6] A battery pack according to any one of claims 3 to 5, wherein the fixing plate (24) is provided with a fourth connection terminal (243) corresponding to a tab of each battery cell, wherein a part of the bus bar (21) can pass through the fourth connection terminal (243) to connect to the tab. [7] A battery pack according to any one of claims 3 to 6, wherein one of the two adjacent sides of the fixing plate (24) and the bus bar (21) is provided with a protruding positioning portion and the other with a positioning groove, the positioning portion being inserted into the positioning groove. [8] The battery pack according to any one of claims 1 to 7, wherein the detection harness (22) comprises at least one connector (221), each connector (221) being connected to a set of bus wire groups, and each set of bus wire groups comprising a plurality of bus wires (222) arranged in a row, one end of each bus wire (222) being connected to the connector (221) and the other end being provided with a bus terminal (223), the bus terminal (223) being connected to the bus bar (21). [9] The battery pack according to claim 8, wherein the bus wire (222) comprises a main body (2221), a detection portion (2222) and a second connection portion, wherein the main body (2221) is connected to the connector (221), wherein the detection portion (2222) is connected to the bus terminal (223), wherein the detection portion (2222) is connected to the first main body (2221) via the second connection portion, wherein the length of the main body (2221) extends along the first direction, wherein the length of the detection portion (2222) extends along the second direction, wherein the first direction is perpendicular to the second direction. [10] Battery pack according to claim 8 or 9, wherein a glue groove (211) is provided in a recess on the bus bar (21), the bus terminal (223) being inserted into the glue groove (211).

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