Explosion-proof assembly and battery pack

Abstract

The utility model provides an explosion-proof assembly and a battery pack. The explosion-proof assembly comprises an explosion-proof piece and a heat conduction connecting piece, the explosion-proof piece is used for being arranged on the peripheral wall of the battery cell in a sleeving mode, one end of the explosion-proof piece is used for being installed and fixed in the first fixing groove of the first support, and the other end of the explosion-proof piece is used for being installed and fixed in the second fixing groove of the second support; the heat conduction connecting piece wraps the outer wall of the explosion-proof piece and is used for being fixedly connected to the first support and the second support. According to the explosion-proof assembly, through the explosion-proof pieces arranged on the peripheral walls of the battery cells in the sleeving mode, the situation that the performance of other battery cells is affected due to side explosion of a single battery cell due to short circuit is prevented, meanwhile, the heat conduction connecting pieces are combined to improve the structural strength of the battery pack, and therefore the overall safety performance of the battery pack is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and in particular, to an explosion-proof component and a battery pack. Background Art

[0002] When the battery is subjected to a through-pin test, a single battery cell inside the battery pack short-circuits, generating a large amount of heat, which can easily affect the performance of the normal battery cells around it, thereby affecting the overall safety performance of the battery pack.

[0003] Therefore, as disclosed in Chinese Patent No. CN 220291006 U, a through-pin test battery module and a lithium battery are provided, and the heat of each battery cell is dissipated through the heat dissipation channels on the heat insulation sheet at the end of the battery cell to improve the safety performance of the battery.

[0004] However, although the above-mentioned through-pin test battery module and lithium battery enhance the heat dissipation ability of the battery cells, when a single battery cell short-circuits and explodes, it is easy to squeeze the normal battery cells around it, resulting in damage to the normal battery cells, thereby affecting the overall safety performance of the battery pack. Summary of the Utility Model

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide an explosion-proof component and a battery pack that can prevent the side explosion of a single battery cell from affecting the performance of other battery cells, thereby improving the safety performance.

[0006] The purpose of the present disclosure is achieved through the following technical solutions:

[0007] An explosion-proof component, comprising:

[0008] An explosion-proof member for sleeving on the outer peripheral wall of the battery cell, one end of the explosion-proof member is used for being installed and fixed in the first fixing groove of the first bracket, and the other end of the explosion-proof member is used for being installed and fixed in the second fixing groove of the second bracket;

[0009] A heat-conducting connecting member covering the outer wall of the explosion-proof member, and the heat-conducting connecting member is used for being fixedly connected to the first bracket and the second bracket.

[0010] In one embodiment, the heat-conducting connecting member is a heat-conducting rubber block or a heat-conducting copper block.

[0011] In one embodiment, the heat-conducting connecting members are respectively formed on the outer wall of the explosion-proof member, and the heat-conducting connecting members are respectively fixed to the first bracket and the second bracket.

[0012] In one embodiment, the explosion-proof member is of a sleeve structure.

[0013] In one embodiment, the explosion-proof member is a stainless steel kit or an aluminum kit.

[0014] A battery pack includes the battery cells, a bracket, and the explosion-proof component according to any one of the above embodiments. The bracket includes the first bracket and the second bracket. The first bracket and the second bracket are disposed opposite to each other, the first fixing groove faces the second fixing groove, an explosion-proof member is sleeved on the outer peripheral wall of the battery cell, and the explosion-proof member is installed and fixed between the first fixing groove and the second fixing groove.

[0015] In one embodiment, one side of the first bracket facing away from the second bracket is the first end side of the bracket, and one side of the second bracket facing away from the first bracket is the second end side of the bracket. The battery pack further includes a heat-insulating member, and the heat-insulating member respectively covers the first end side and the second end side of the bracket.

[0016] In one embodiment, the battery pack further includes a housing and an explosion-proof valve. The heat-insulating member is disposed on the inner wall of the housing, and the explosion-proof valve is disposed on the housing.

[0017] In one embodiment, the heat-insulating member is formed with a pressure relief avoidance area, and the pressure relief avoidance area is disposed opposite to the explosion-proof valve.

[0018] Compared with the prior art, the present disclosure has at least the following advantages:

[0019] The explosion-proof member is sleeved on the outer peripheral wall of the battery cell, effectively limiting the degree of side explosion of the battery cell in the case of short circuit, reducing the impact of the explosion of the battery cell on the normal battery cells around it, thereby improving the overall safety performance of the battery pack. Since both ends of the explosion-proof member are respectively fixed in the first fixing groove of the first bracket and the second fixing groove of the second bracket, the stability of the installation of the explosion-proof member is ensured, making the position of the explosion-proof member stable when the battery cell explodes. Also, since the heat-conducting connecting member is coated on the outer wall of the explosion-proof member and fixedly connected to the first bracket and the second bracket, on the one hand, the heat generated by the battery cell is quickly dissipated, enhancing the heat dissipation effect, and on the other hand, the stability of the explosion-proof member is further strengthened. Further, the combination of the explosion-proof member and the heat-conducting connecting member improves the structural strength of the battery pack, and can effectively prevent the extrusion of the normal battery cells around it when a single battery cell has a side explosion, thereby improving the overall safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is an exploded structural schematic diagram of the battery pack of the present disclosure;

[0022] Figure 2 is Figure 1 the partial enlarged view shown at A in

[0023] Figure 3 is Figure 1 the exploded structural schematic diagram of the explosion-proof component and the bracket in the battery pack shown in

[0024] Figure 4 is Figure 1 the structural schematic diagram of an explosion-proof part covering the battery cell in the battery pack shown in

[0025] Figure 5 is Figure 1 the sectional view of the explosion-proof component in the battery pack shown in

[0026] Reference numerals: 10, explosion-proof component; 100, explosion-proof part; 200, heat-conducting connecting piece; 1, battery pack; 20, bracket; 21, first bracket; 22, second bracket; 22a, second fixing groove; 30, heat-insulating part; 31, pressure relief and avoidance area; 40, housing; 50, explosion-proof valve; 60, battery cell. Detailed implementation manners

[0027] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the understanding of the disclosure content of the present disclosure is more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present disclosure belongs. The terms used in the description of the present disclosure herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] The present disclosure provides an explosion-proof component, including an explosion-proof member and a heat-conducting connecting member. The explosion-proof member is used to sleeve the outer peripheral wall of the battery cell. One end of the explosion-proof member is used to be installed and fixed in the first fixing groove of the first bracket, and the other end of the explosion-proof member is used to be installed and fixed in the second fixing groove of the second bracket. The heat-conducting connecting member is coated on the outer wall of the explosion-proof member and is used to fixedly connect to the first bracket and the second bracket.

[0031] The explosion-proof member sleeves the outer peripheral wall of the battery cell, effectively limiting the degree of side explosion of the battery cell in the case of short circuit, reducing the impact of the battery cell explosion on the normal battery cells around it, thereby improving the overall safety performance of the battery pack. Since both ends of the explosion-proof member are respectively fixed in the first fixing groove of the first bracket and the second fixing groove of the second bracket, the stability of the installation of the explosion-proof member is ensured, making the position of the explosion-proof member stable when the battery cell explodes. Also, since the heat-conducting connecting member is coated on the outer wall of the explosion-proof member and fixedly connected to the first bracket and the second bracket, on the one hand, the heat generated by the battery cell is quickly dissipated, enhancing the heat dissipation effect, and on the other hand, the stability of the explosion-proof member is further strengthened. The combination of the explosion-proof member and the heat-conducting connecting member improves the structural strength of the battery pack, and can effectively prevent the extrusion of the normal battery cells around it when a single battery cell has a side explosion, thereby improving the overall safety performance of the battery pack.

[0032] To better understand the technical solutions and beneficial effects of the present disclosure, the following further elaborates on the present disclosure with specific embodiments:

[0033] As Figures 1 to 5 shown, the explosion-proof component 10 of an embodiment includes an explosion-proof member 100 and a heat-conducting connecting member 200. The explosion-proof member 100 is used to sleeve the outer peripheral wall of the battery cell 60. One end of the explosion-proof member 100 is used to be installed and fixed in the first fixing groove (not shown in the figure) of the first bracket 21, and the other end of the explosion-proof member 100 is used to be installed and fixed in the second fixing groove 22a of the second bracket 22. The heat-conducting connecting member 200 is coated on the outer wall of the explosion-proof member 100 and is used to fixedly connect to the first bracket 21 and the second bracket 22.

[0034] In this embodiment, the explosion-proof member 100 is sleeved on the outer peripheral wall of the battery cell 60, effectively restricting the degree of explosion of the battery cell 60 in case of short circuit, reducing the impact of the explosion of the battery cell 60 on the normal battery cells 60 around it, and thus improving the overall safety performance of the battery pack 1; since both ends of the explosion-proof member 100 are respectively fixed in the first fixing groove (not shown in the figure) of the first bracket 21 and the second fixing groove 22a of the second bracket 22, the stability of the installation of the explosion-proof member 100 is ensured, making the position of the explosion-proof member 100 stable when the battery cell 60 explodes; and since the heat-conducting connecting member 200 is coated on the outer wall of the explosion-proof member 100 and fixedly connected to the first bracket 21 and the second bracket 22, on the one hand, the heat generated by the battery cell 60 is quickly dissipated, enhancing the heat dissipation effect, and on the other hand, the stability of the explosion-proof member 100 is further strengthened.

[0035] Furthermore, the combination of the explosion-proof member 100 and the heat-conducting connecting member 200 improves the structural strength of the battery pack 1, and can effectively prevent the extrusion of the normal battery cells 60 around a single battery cell 60 during explosion, thereby improving the overall safety performance of the battery pack 1.

[0036] In one embodiment, the heat-conducting connecting member 200 is a heat-conducting glue block or a heat-conducting copper block. In this embodiment, the heat-conducting glue block has good filling performance and heat-conducting performance, can tightly fill the outer wall of the explosion-proof member 100, on the one hand, enhancing the structural strength of the explosion-proof member 100, and on the other hand, enabling the heat generated during the explosion of the battery cell 60 to be quickly dissipated; while the heat-conducting copper block has good heat-conducting performance and can quickly transfer the heat, improving the heat dissipation effect.

[0037] As Figure 1 and Figure 2 shown, in one embodiment, the heat-conducting connecting members 200 are respectively formed on the outer wall of the explosion-proof member 100, and the heat-conducting connecting members 200 are respectively fixed to the first bracket 21 and the second bracket 22. In this embodiment, since the heat-conducting connecting members 200 are formed on the outer wall of the explosion-proof member 100, ensuring the tight combination of the heat-conducting connecting members 200 and the explosion-proof member 100, on the one hand, improving the structural strength of the explosion-proof member 100, thereby enhancing the explosion-proof effect of the explosion-proof member 100 when the battery cell 60 explodes, and on the other hand, improving the heat-conducting effect of the heat-conducting connecting members 200, realizing the rapid diffusion of the heat generated during the explosion of the battery cell 60, and thus improving the heat dissipation performance; further, the heat-conducting connecting members 200 are respectively fixed to the first bracket 21 and the second bracket 22, enhancing the stability of the overall structure, preventing the heat-conducting connecting members 200 and the explosion-proof member 100 from shifting during the explosion of the battery cell 60, and thus improving the overall safety performance of the battery pack 1.

[0038] In one embodiment, the explosion-proof member 100 is of a sleeve structure. In this embodiment, the number of explosion-proof members 100 of the sleeve structure is multiple, and the number of explosion-proof members 100 is the same as the number of battery cells 60. Each explosion-proof member 100 is arranged in one-to-one correspondence with each battery cell 60. The explosion-proof member 100 plays a role in wrapping and protecting the battery cells, ensuring that when a single battery cell 60 explodes, the impact on the normal battery cells 60 around it is avoided, improving the explosion-proof effect of the explosion-proof member 100, and thus improving the overall safety performance of the battery pack 1.

[0039] In one embodiment, the explosion-proof member 100 is a stainless steel kit or an aluminum kit. In this embodiment, the stainless steel kit has high strength and can effectively resist the impact when the battery cell 60 explodes. The aluminum kit has good heat conduction performance and helps with auxiliary heat dissipation when the battery cell 60 explodes.

[0040] As Figures 1 to 3 shown, the present disclosure also provides a battery pack 1, including battery cells 60, a bracket 20, and the explosion-proof assembly 10 described in any of the above embodiments. The bracket 20 includes a first bracket 21 and a second bracket 22; the first bracket 21 and the second bracket 22 are arranged opposite to each other, and a first fixing groove (not shown in the figure) faces the second fixing groove 22a. An explosion-proof member 100 is sleeved on the outer peripheral wall of the battery cell 60, and the explosion-proof member 100 is installed and fixed between the first fixing groove (not shown in the figure) and the second fixing groove 22a. In this embodiment, the relatively arranged first bracket 21 and second bracket 22, and the explosion-proof member 100 is installed and fixed between the first fixing groove (not shown in the figure) and the second fixing groove 22a, providing a stable and fixed installation position for the explosion-proof member 100. When a short circuit occurs in the battery cell 60, the explosion-proof member 100 can provide an effective explosion-proof function, thereby improving the overall safety performance of the battery pack 1.

[0041] As Figure 1 shown, in one embodiment, the side of the first bracket 21 facing away from the second bracket 22 is the first end side of the bracket 20, and the side of the second bracket 22 facing away from the first bracket 21 is the second end side of the bracket 20. The battery pack 1 further includes a heat insulation member 30, and the heat insulation member 30 respectively covers the first end side and the second end side of the bracket 20. In this embodiment, since the heat insulation member 30 covers the first end side and the second end side of the bracket 20, on the one hand, it can effectively prevent the temperature at both ends of the battery pack 1 from being too high, improving the safety of using the battery pack 1. On the other hand, it reduces the influence of temperature changes in the external environment on the inside of the battery pack 1, enhancing the working stability of the battery pack 1; at the same time, the heat insulation member 30 covering the first end side and the second end side of the bracket 20 reduces the influence of external impact on the inside of the battery pack 1 to a certain extent, playing a role of buffering and protection.

[0042] As Figure 1As shown, in one embodiment, the battery pack 1 further includes a housing 40 and an explosion-proof valve 50. The heat insulation member 30 is disposed on the inner wall of the housing 40, and the explosion-proof valve 50 is disposed on the housing 40. In this embodiment, the added explosion-proof valve 50 on the housing 40 ensures that when the battery cells 60 dissipate heat, rapid pressure relief can occur inside the housing 40, preventing the heat of the battery cells 60 from accumulating, thereby improving the safety performance of the battery pack 1.

[0043] As Figure 1 shown, in one embodiment, the heat insulation member 30 is formed with a pressure relief avoidance area 31, and the pressure relief avoidance area 31 is disposed opposite to the explosion-proof valve 50. In this embodiment, when the internal pressure of the battery pack 1 is too high, the pressure relief avoidance area 31 formed by the heat insulation member 30 can provide sufficient space for the high-temperature gas to smoothly discharge through the explosion-proof valve 50, ensuring that the explosion-proof valve 50 can play the pressure relief role in a timely and effective manner, reducing the situation of the battery pack 1 bursting due to excessive internal pressure; further enhancing the safety of the battery pack 1 under abnormal conditions, reducing potential safety hazards, extending the overall service life of the battery pack 1, and thus improving the overall safety performance of the battery pack 1.

[0044] Compared with the prior art, the present disclosure has at least the following advantages:

[0045] The explosion-proof member 100 is sleeved on the outer peripheral wall of the battery cell 60, effectively limiting the degree of side explosion of the battery cell 60 in the case of a short circuit, reducing the impact of the explosion of the battery cell 60 on the surrounding normal battery cells 60, thereby improving the overall safety performance of the battery pack 1; since both ends of the explosion-proof member 100 are respectively fixed in the first fixing groove (not shown in the figure) of the first bracket 21 and the second fixing groove 22a of the second bracket 22, ensuring the stability of the installation of the explosion-proof member 100 and making the position of the explosion-proof member 100 stable when the battery cell 60 explodes; and since the heat conduction connecting member 200 is coated on the outer wall of the explosion-proof member 100 and fixedly connected to the first bracket 21 and the second bracket 22, on the one hand, the heat generated by the battery cell 60 is quickly dissipated, enhancing the heat dissipation effect, and on the other hand, further strengthening the stability of the explosion-proof member 100; further, the combination of the explosion-proof member 100 and the heat conduction connecting member 200 improves the structural strength of the battery pack 1, and can effectively prevent the extrusion of the surrounding normal battery cells 60 when a single battery cell 60 has a side explosion, thereby improving the overall safety performance of the battery pack 1.

[0046] The above-described embodiments only represent several implementation manners of the present disclosure, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several deformations and improvements can still be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. An explosion-proof component, characterized in that, include: An explosion-proof component is used to be sleeved on the outer peripheral wall of the battery core, one end of the explosion-proof component is used to be installed and fixed in the first fixing groove of the first bracket, and the other end of the explosion-proof component is used to be installed and fixed in the second fixing groove of the second bracket; A heat-conducting connector is coated on the outer wall of the explosion-proof component, and the heat-conducting connector is used for fixedly connecting to the first bracket and the second bracket.

2. The explosion-proof component according to claim 1, wherein The heat-conducting connecting piece is a heat-conducting rubber block or a heat-conducting copper block.

3. The explosion-proof component according to claim 1, wherein The heat-conducting connecting members are respectively formed on the outer wall of the explosion-proof member, and the heat-conducting connecting members are respectively fixed to the first bracket and the second bracket.

4. The explosion-proof component according to claim 1, wherein, The explosion-proof component is a sleeve structure.

5. The explosion-proof component according to claim 1, characterized in that, The explosion-proof component is a stainless steel kit or an aluminum kit.

6. A battery pack, characterized in that, It includes the battery cell, a bracket and the explosion-proof component according to any one of claims 1 to 5, the bracket includes the first bracket and the second bracket; the first bracket is arranged opposite to the second bracket, the first fixing groove is arranged toward the second fixing groove, the outer peripheral wall of the battery cell is provided with the explosion-proof component, and the explosion-proof component is installed and fixed between the first fixing groove and the second fixing groove.

7. The battery pack according to claim 6, characterized in that, The side of the first bracket facing away from the second bracket is the first end side of the bracket, and the side of the second bracket facing away from the first bracket is the second end side of the bracket. The battery pack also includes a heat insulating member, which covers the first end side and the second end side of the bracket respectively.

8. The battery pack according to claim 7, wherein, The battery pack further includes a shell and an explosion-proof valve. The heat insulating component is arranged on the inner wall of the shell, and the explosion-proof valve is arranged on the shell.

9. The battery pack according to claim 8, characterized in that, The heat insulation component forms a pressure relief avoidance zone, and the pressure relief avoidance zone is arranged opposite to the explosion-proof valve.

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