Battery pack and electric equipment

Abstract

The utility model relates to a battery pack and electric equipment, the battery pack comprises a protection part, a battery monomer and a supporting part, the supporting part is provided with an avoiding opening, the avoiding opening is used for being arranged corresponding to an anti-explosion valve of the battery monomer, the protection part comprises a main body part and at least one annular part, the annular part is connected to the main body part, and the annular part is arranged on the main body part. The main body part is arranged between the supporting part and the battery monomers, and an opening is formed in the main body part and is used for communicating a valve port of the anti-explosion valve with the air inlet end of the internal space of the annular part. Wherein the annular part extends into the receding opening and at least partially shields the inner wall of the receding opening in the radial direction of the receding opening, and a gap is formed between at least part of the peripheral wall of the annular part and the inner wall of the receding opening. Therefore, emissions of the single batteries on the discharge path of the avoiding opening position are far away from the supporting part as far as possible, the integrity of the supporting part is ensured, the possibility of reducing the strength of the supporting part is reduced, the overall strength of the battery pack is ensured, and the safety of the battery pack is further ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery packs, and in particular to a battery pack and an electrical device. Background Art

[0002] A battery pack is a device used to provide energy to electrical equipment and is a core component of these devices. The battery pack of a new energy vehicle contains battery cells. The explosion-proof valves of the battery cells are connected to the escape ports of the support components and face the bottom of the vehicle. This ensures that if a battery cell experiences thermal runaway, smoke and other substances are discharged toward the bottom of the vehicle, ensuring the safety of the driver and passengers. In related technologies, the support components themselves have poor protection against thermal runaway of the battery cells, resulting in lower safety of the battery pack. Utility Model Content

[0003] The purpose of the present disclosure is to provide a battery pack and an electric device to at least partially solve the technical problems existing in the related art.

[0004] In order to achieve the above object, according to a first aspect of the present disclosure, a battery pack is provided, the battery pack comprising a protective member, a battery cell and a supporting member;

[0005] The support component is provided with an escape opening, and the escape opening is arranged corresponding to the explosion-proof valve of the battery cell;

[0006] The protective member includes a main body and at least one annular portion, the annular portion is connected to the main body, the main body is arranged between the support component and the battery cell, and an opening is provided on the main body, the opening is used to connect the valve port of the explosion-proof valve with the air inlet end of the internal space of the annular portion;

[0007] The annular portion extends into the escape opening and at least partially blocks the inner wall of the escape opening along the radial direction of the escape opening, and a gap exists between at least a portion of the outer peripheral wall of the annular portion and the inner wall of the escape opening.

[0008] Optionally, there is no contact portion between the outer peripheral wall of the annular portion and the inner wall of the avoidance opening;

[0009] The width of the gap between the outer peripheral wall of the annular portion and the inner wall of the avoidance opening is 3 mm to 6 mm.

[0010] Optionally, the minimum value of the width of the gap between the outer peripheral wall of the annular portion and the inner wall of the avoidance opening is a first value, and the value of the axial length of the avoidance opening is a second value;

[0011] The first value is greater than or equal to the second value.

[0012] Optionally, the shape of the axial cross section of the annular portion is adapted to the shape of the axial cross section of the avoidance opening.

[0013] Optionally, the protective member is made of insulating material.

[0014] Optionally, a blocking portion is provided at one end of the annular portion away from the main body portion, and the blocking portion is used to close one end of the internal space of the annular portion;

[0015] Furthermore, the blocking portion is configured to be separable from the annular portion under the action of the gas in the explosion-proof valve.

[0016] Optionally, the first end of the annular portion is connected to the main body portion, the annular portion includes a diameter-changing portion, and one end of the diameter-changing portion extends to a second end of the annular portion opposite to the first end;

[0017] The inner diameter of the diameter-changing portion gradually increases in a direction from the first end to the second end.

[0018] Optionally, the first end of the annular portion is connected to the main body portion, the annular portion includes a diameter-changing portion, and one end of the diameter-changing portion extends to a second end of the annular portion opposite to the first end;

[0019] The inner diameter of the diameter-changing portion gradually decreases in a direction from the first end to the second end.

[0020] Optionally, there are multiple annular portions, and the multiple annular portions are arranged at intervals on the main body in the first direction.

[0021] Optionally, the main body is configured as a strip extending along the first direction.

[0022] Optionally, the number of the battery cells and the number of the protective members are both plural, and the battery pack includes a plurality of battery cell groups arranged along the second direction;

[0023] Each battery cell group includes a plurality of battery cells arranged along the first direction, and each of the protective members corresponds to one of the battery cell groups;

[0024] A plurality of the protection members are arranged at intervals along the second direction, and each of the annular portions on each of the protection members corresponds to an explosion-proof valve of the battery cell.

[0025] Optionally, the supporting component includes a liquid cooling plate located at the bottom of the battery cell, and the avoidance opening is provided on the liquid cooling plate.

[0026] According to a second aspect of the present disclosure, an electric device is provided, comprising the battery pack.

[0027] Through the above-mentioned technical solution, the annular portion of the protective member can at least partially block the inner wall of the escape opening along its radial direction, thereby providing shielding and protection for the inner wall of the escape opening. Furthermore, the outer circumferential wall of the annular portion includes a portion that is clearance-matched with the inner wall of the escape opening. This helps to compress the discharge path of battery cell waste at the escape opening, ensuring that the waste on the discharge path at the escape opening is kept as far away from the support component as possible, thus ensuring the integrity of the support component, reducing the possibility of weakening the support component, and ensuring the overall strength of the battery pack, thereby ensuring the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0029] Figure 1 is a schematic structural diagram of a battery pack provided by one embodiment of the present disclosure, showing a partially exploded state;

[0030] Figure 2 is a structural schematic diagram of a support component provided by an embodiment of the present disclosure;

[0031] Figure 3 is a structural schematic diagram of a support component provided by an embodiment of the present disclosure from another perspective (bottom perspective);

[0032] Figure 4 yes Figure 3 Enlarged view of part A;

[0033] Figure 5 is a schematic diagram of the arrangement positions of multiple protective elements provided by one embodiment of the present disclosure;

[0034] Figure 6 yes Figure 5 Enlarged view of part B;

[0035] Figure 7 is a schematic cross-sectional view of a portion of the structure of a battery pack provided in one embodiment of the present disclosure;

[0036] Figure 8 is a cross-sectional schematic diagram of a protective member provided in another embodiment of the present disclosure;

[0037] Figure 9 2 is a schematic cross-sectional view of a protective element provided in yet another embodiment of the present disclosure.

[0038] Description of Reference Numerals

[0039] 100、battery pack, 10、protection piece, 11、annular portion, 111、outer peripheral wall, 12、main body portion, 121、opening, 13、plugging portion, 14、weak area, 20、support member, 21、liquid cooling plate, 211、avoidance opening, 2111、inner wall, 22、bottom guard plate, 23、exhaust passage, 30、battery monomer group, 31、battery monomer, 311、explosion-proof valve, 40、structural adhesive. DETAILED DESCRIPTION

[0040] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0041] In the present disclosure, the orientation words such as "upper", "lower", "top", "bottom" used are generally defined with the upper, lower, top, bottom of the battery pack in the normal use state, only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, and a particular orientation configuration and operation, therefore, cannot be understood as a limitation of the present disclosure. "Inner" and "outer" refer to the inner and outer of the outline of the corresponding components. Among them, the "first direction" and the "second direction" are as shown in the first direction and the second direction, and in addition, the terms "first", "second" and the like are used to distinguish one element from another element, and do not have sequential and important meanings. Figure 1 and Figure 5 The terms "first", "second", and the like are used to distinguish one element from another element, and do not have sequential and important meanings.

[0042] In the description of the present disclosure, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "linked", "mounted" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0043] In the present disclosure, as Figures 1 to 9As shown, a battery pack 100 is provided, which includes a protective member 10, a battery cell 31 and a support member 20. The support member 20 is provided with an escape port 211, which is used to be arranged corresponding to the explosion-proof valve 311 of the battery cell 31. The protective member 10 includes a main body 12 and at least one annular portion 11. The annular portion 11 is connected to the main body 12. The main body 12 is provided between the support member 20 and the battery cell 31. The main body 12 is provided with an opening 121. The opening 121 is used to connect the valve port of the explosion-proof valve 311 with the air inlet end of the interior space of the annular portion 11. That is, the gas from the explosion-proof valve 311 will enter the annular portion 11 through the opening 121 in the main body 12 and can flow out of the annular portion 11 through the air outlet end (the end away from the main body 12) of the annular portion 11. This can prevent the gas ejected from the explosion-proof valve 311 and the high-temperature conductive material carried away from it from entering the gap between the outer peripheral wall 111 of the annular portion 11 and the inner wall 2111 of the avoidance opening 211. The annular portion 11 extends into the avoidance opening 211 and at least partially blocks the inner wall 2111 of the avoidance opening 211 along the radial direction of the avoidance opening 211. Moreover, a gap exists between at least a portion of the outer peripheral wall 111 of the annular portion 11 and the inner wall 2111 of the avoidance opening 211.

[0044] The above-described technical solution provides a protective member 10. The annular portion 11 of the protective member 10 can at least partially block the inner wall 2111 of the escape opening 211 along its radial direction, providing shielding and protection for the inner wall 2111 of the escape opening 211. Furthermore, the outer peripheral wall 111 of the annular portion 11 includes a portion that is clearance-fitted with the inner wall 2111 of the escape opening 211. This facilitates compressing the discharge path of battery cell 31 emissions (e.g., gases emitted from the explosion-proof valve 311 and high-temperature conductive material) during thermal runaway at the escape opening 211. This ensures that the discharge from the battery cells 31 along the escape opening 211 path is kept as far away from the support member 20 as possible, thus ensuring the integrity of the support member 20 and minimizing the possibility of weakening the support member 20. This ensures the overall strength of the battery pack 100, and thus the safety of the battery pack 100.

[0045] Among them, at least partially blocking the inner wall 2111 of the avoidance opening 211 along the radial direction of the avoidance opening 211 means that at least part of the annular portion 11 along the radial direction of the avoidance opening 211 can be projected onto the inner wall 2111 of the avoidance opening 211, that is, there is a gap between the annular portion 11 and the avoidance opening 211, but the annular portion 11 can form a shielding protection for the inner wall 2111 of the avoidance opening 211.

[0046] In order to enhance the protective effect of the annular portion 11 on the inner wall of the avoidance opening 211 , the annular portion 11 may be configured to completely block the inner wall 2111 of the avoidance opening 211 along the radial direction of the avoidance opening 211 .

[0047] In the present disclosure, the annular portion 11 of the protective member 10 can guide the gas discharged from the explosion-proof valve 311 to prevent the gas from running around and damaging the surrounding parts near the explosion-proof valve 311 (such as the liquid cooling plate 21 below), thereby protecting the surrounding parts near the explosion-proof valve 311, which is beneficial to avoid the exhaust gas ejected from the explosion-proof valve 311 of the battery cell 31 from damaging the supporting component 20, thereby ensuring the safety of the battery pack 100.

[0048] When the protective member 10 is made of insulating material, the protective member 10 can guide the gas discharged from the explosion-proof valve 311 when the battery cell 31 is depressurized and at the same time play a heat-insulating role, thereby improving the controllability of thermal runaway and ensuring the safety of the battery pack 100.

[0049] In the present disclosure, the annular portion 11 is arranged inside the avoidance opening 211 and blocks the inner wall 2111 of the avoidance opening 211. Since the explosion-proof valve 311 of the battery cell 31 is connected to the avoidance opening 211 of the support component 20, when the battery cell 31 has thermal runaway, the discharge ejected from the explosion-proof valve 311 will not directly contact the avoidance opening 211 of the support component 20, but will directly contact the annular portion 11. In addition, the outer peripheral wall 111 of the annular portion 11 has a clearance fit with the inner wall 2111 of the avoidance opening 211. Even if the emissions hit the inner wall 2111 of the annular portion 11, the gap between the two can also act as a buffer, so that the emissions will not directly hit the inner wall 2111 of the avoidance opening 211, which is beneficial to preventing the emissions from damaging the insulating layer on the support component 20, avoiding direct contact between the emissions and the support component 20 and causing short circuit, avoiding the occurrence of secondary high-voltage arcing locally inside the battery pack 100, and preventing heat from spreading inside the battery pack 100, thereby improving the safety performance of the battery pack 100.

[0050] In some other embodiments, when the protective member 10 is configured as a non-insulating member (such as a metal member), an insulating coating is provided on the support component 20, and the protective member 10 can protect the insulating layer on the support component 20 to prevent the insulating layer from being penetrated by emissions.

[0051] In this disclosure, Figure 7 As shown, there may be no contact portion between the outer peripheral wall 111 of the annular portion 11 and the inner wall 2111 of the escape opening 211 .

[0052] The present disclosure does not limit the specific value of the gap between the outer peripheral wall 111 of the annular portion 11 and the inner wall 2111 of the avoidance opening 211. Optionally, the gap between the outer peripheral wall 111 of the annular portion 11 and the inner wall 2111 of the avoidance opening 211 ( Figure 7 The width of L) shown can be 3mm-6mm. Such an arrangement can protect the inner wall 2111 of the avoidance opening 211 while ensuring that the gas in the explosion-proof valve 311 can be discharged smoothly.

[0053] When the protective member 10 is configured as an insulating member that deforms under heat, such as a thermoplastic fiber material, since the thermoplastic fiber material will sag after being subjected to thermal shock, the annular portion 11 can fit and cover the inner wall 2111 of the avoidance opening 211, so that the gap between the outer peripheral wall 111 of the annular portion 11 and the inner wall 2111 of the avoidance opening 211 can be adjusted. To achieve this purpose, the minimum value of the width L of the gap between the outer peripheral wall 111 of the annular portion 11 and the inner wall 2111 of the avoidance opening 211 is a first value, and the axial length X of the avoidance opening 211 ( Figure 7 In the embodiment where the value of X) is the second value, the first value may be greater than or equal to the second value, thereby ensuring that the drooped thermoplastic fiber material can cover the inner wall 2111 of the avoidance opening 211 .

[0054] In extreme cases, the annular portion 11 may fall off from the main body 12 as a whole, making the first value greater than or equal to the second value, and it can also ensure that the part of the main body 12 corresponding to the width of the gap is folded to cover the inner wall 2111 of the avoidance opening 211.

[0055] In this disclosure, Figure 5 and Figure 6 As shown, the axial cross-section of the annular portion 11 can be adapted to the axial cross-section of the escape opening 211. This arrangement allows the gap between the outer peripheral wall 111 of the annular body and the inner wall 2111 of the escape opening 211 to remain as consistent as possible at any position. This ensures that the impact of the discharge ejected from the explosion-proof valve 311 on the inner wall 2111 of the escape opening 211 remains consistent at all locations, thereby ensuring the integrity of the inner wall 2111. Furthermore, processing is relatively easy.

[0056] In some other embodiments, the avoidance opening 211 can be set as a waist hole, and the annular portion 11 can be set as a waist hole. The length dimension of the waist hole of the annular portion 11 is set to be smaller than the length dimension of the waist hole of the avoidance opening 211, and the width dimension of the waist hole of the annular portion 11 is set to be slightly smaller than the width dimension of the waist hole of the avoidance opening 211. That is, the gap between the inner wall 2111 in the width direction of the avoidance opening 211 and the outer peripheral wall 111 of the annular portion 11 can be set to be smaller than the gap between the inner wall 2111 in the length direction of the avoidance opening 211 and the outer peripheral wall 111 of the annular portion 11. Such a setting can improve the stability of the installation of the annular portion 11.

[0057] The escape opening 211 and the annular portion 11 are both configured as waist holes (waist-shaped through holes), allowing the discharge from the explosion-proof valve 311 to be quickly discharged through the escape opening 211 , thereby reducing the risk of secondary high pressure caused by discharge obstruction and improving the safety performance of the battery pack 100 ;

[0058] When the width of the avoidance opening 211 is Y and the width of the explosion-proof valve 311 is Z, the width of the annular portion 11 is W, where Z <W<Y,长度方向尺寸同理。

[0059] In the present disclosure, the material used for the annular portion 11 can be an insulating material. In this way, an insulating layer may not be provided inside the avoidance port 211 blocked by the annular portion 11, and the annular portion 11 can act as the insulating layer of this part to play an insulating role, while avoiding the risk of failure of the insulating layer due to scratches. That is, the design of the annular portion 11 can not only protect the inner wall 2111 of the avoidance port 211 from damage, but also serve as an insulating member between the discharge ejected by the explosion-proof valve 311 and the avoidance port 211 of the support component 20, preventing a short circuit between the two. That is, while the protective member 10 protects the peripheral parts, it can also reduce the requirements for insulation and heat insulation of the peripheral parts, thereby reducing the production cost of the peripheral parts.

[0060] The annular portion 11 can be made of a ductile insulating material, such as a thermoplastic composite material. This material is heat-resistant and flame-retardant, providing insulation against heat conduction, preventing thermal runaway from spreading, and facilitating film molding. Other flame-retardant and insulating materials, such as thermoplastic PPS substrates and continuous glass fiber composites, can also be used.

[0061] In the present disclosure, the main body 12 may also be made of insulating material, and the specific material may be the same as that of the annular portion 11 , which is not limited in the present disclosure.

[0062] In the present disclosure, a sealing portion 13 may be provided at one end of the annular portion 11 away from the main body 12. The sealing portion 13 is used to close one end of the internal space of the annular portion 11, and the sealing portion 13 is configured to be able to separate from the annular portion 11 under the action of the gas in the explosion-proof valve 311. In this way, when the battery cell 31 does not experience thermal runaway, the sealing portion 13 can block the avoidance port 211 to prevent foreign matter from entering the space where the explosion-proof valve 311 of the battery cell 31 is located and affecting the pressure relief performance. When the battery cell 31 experiences thermal runaway, the discharge material in the sealing portion 13 is destroyed, allowing the discharge material to smoothly pass through the annular portion 11 and be discharged outside the battery cell 31.

[0063] In the present disclosure, the annular portion 11 and the blocking portion 13 may be constructed as a molded protruding structure, which is conducive to effective plugging with the avoidance opening 211 and facilitates the implementation of the assembly process.

[0064] In the present disclosure, at least part of the raised structure does not adhere to the inner wall 2111 of the avoidance opening 211. When thermal runaway occurs, the discharge of the explosion-proof valve 311 will only flush open the blocking portion 13, and the side surface (outer peripheral wall 111) of the annular portion 11 will still adhere to the inner wall 2111 of the avoidance opening 211, thereby ensuring the protective effect.

[0065] Among them, such as Figure 6 As shown, a weak area 14 is provided at the connection between the blocking portion 13 and the annular portion 11 . The weak area 14 is configured to be destroyed by emissions when thermal runaway occurs in the battery cell 31 , so that the emissions can pass through the annular portion 11 .

[0066] In the present disclosure, the weak area 14 can be set to have a lower melting point than the annular portion 11 and the rest of the portion, or the weak area 14 can be set to have a smaller thickness than the annular portion 11 and the rest of the portion, or the weak area 14 can be provided with a structure that is easily destroyed, such as a notch.

[0067] For example, the material is fiber cloth, such as Figure 7 As shown, the fiber in the weak area 14 is cut off to complete the product molding. After the explosion-proof valve 311 is thermally runaway, it can be opened in a designated position and shape, avoiding the phenomenon of explosion-proof valve 311 being blocked or spraying randomly.

[0068] In this disclosure, Figure 8 As shown, the first end of the annular portion 11 can be connected to the main body 12. The annular portion 11 includes a variable diameter portion. One end of the variable diameter portion extends to the second end of the annular portion 11, opposite the first end. The inner diameter of the variable diameter portion gradually increases from the first end toward the second end. In other words, the second end of the annular portion 11 can be configured as a trumpet-shaped gas guide. This facilitates the discharge of emissions from the explosion-proof valve 311. Furthermore, the trumpet-shaped design can protect components near the escape port 211, reducing damage to nearby components from emissions.

[0069] like Figure 9 As shown, in another embodiment of the present disclosure, the first end of the annular portion 11 is connected to the main body 12. The annular portion 11 includes a reducing portion. One end of the reducing portion extends to the second end of the annular portion 11, opposite the first end. The inner diameter of the reducing portion gradually decreases from the first end toward the second end. This arrangement further constricts the discharge channel, helping to reduce outward gas diffusion and prevent the annular portion 11 from impacting the inner wall of the liquid cooling plate 21 and potentially damaging the liquid 21.

[0070] In some embodiments of the present disclosure, Figure 8As shown, the variable diameter portion can extend into the exhaust channel 23 described below, so that when the exhaust is discharged, it can be kept as far away as possible from the component (such as the liquid cooling plate 21) provided with the avoidance opening 211 in the support component 20, thereby reducing the damage to the component (liquid cooling plate 21) caused by the exhaust.

[0071] In the present disclosure, the number of the annular portion 11 can be multiple, and the multiple annular portions 11 are spaced apart in the first direction from the main body 12. In this way, one main body 12 can protect multiple avoidance openings 211, which can facilitate the production and installation of the protective member 10.

[0072] In the present disclosure, the main body portion 12 is configured as a strip-shaped member that can extend along a first direction.

[0073] In the present disclosure, both the number of battery cells 31 and the number of protective members 10 can be multiple. The battery pack 100 includes multiple battery cell groups 30 arranged along the second direction. Each battery cell group 30 includes multiple battery cells 31 arranged along the first direction. Each protective member 10 corresponds to a battery cell group 30. The multiple protective members 10 are spaced apart along the second direction, and each annular portion 11 on each protective member 10 corresponds to the explosion-proof valve 311 of a battery cell 31. This arrangement allows each battery cell group 30 to correspond to a single protective member 10. This simplifies the manufacture and installation of the protective members 10 while also ensuring individual protection between the multiple battery cell groups 30.

[0074] The present disclosure does not limit the specific structure of the support component 20 . The support component 20 may include a liquid cooling plate 21 located at the bottom of the battery cell 31 , and a relief opening 211 is provided on the liquid cooling plate 21 .

[0075] The liquid cooling plate 21 may be bonded to the bottom of the battery cell 31 by means of a structural adhesive 40 , and is used for exchanging heat with the battery cell 31 , for example, cooling and heating the battery cell 31 .

[0076] In some embodiments, the support component 20 may include a liquid cooling plate 21 and a bottom guard plate 22. An exhaust channel 23 is defined between the bottom guard plate 22 and the liquid cooling plate 21. The liquid cooling plate 21 is provided with a relief port 211. The liquid cooling plate 21 may be spaced apart from the bottom guard plate 22 to form an exhaust channel 23. The exhaust channel 23 may communicate with the exterior of the battery pack 100. For example, the exhaust channel 23 may communicate with an exhaust valve on the battery housing (e.g., a sidewall of a frame). In this way, when a battery cell 31 experiences thermal runaway, the gas within the battery cell 31 may be discharged to the exterior of the battery pack 100 via the explosion-proof valve 311, the relief port 211, and the exhaust channel 23.

[0077] In the present disclosure, when the protective member 10 is set as an insulating and heat-resistant member, the protective member 10 has heat resistance and chemical stability, which can effectively reduce the possibility of damage to the bottom surface of the battery cell 31 under conditions such as vibration, impact, and high temperature, thereby improving the performance of the battery cell 31. At the same time, the presence of the protective member 10 can effectively isolate the valve ports of each adjacent explosion-proof valve 311, thereby preventing heat spread when thermal runaway occurs.

[0078] In addition, due to the insulating properties of the protective member 10, the portion of the surface of the liquid cooling plate 21 blocked by the protective member 10 does not need to be sprayed with an insulating layer (such as an epoxy coating), and effective insulation can be achieved between this portion and the battery cell 31, which is beneficial to reducing costs.

[0079] It is understood that the portion of the surface of the liquid cooling plate 21 shielded by the protective member 10 can also be sprayed with an insulating layer (e.g., an epoxy coating). The protective member 10 protects this insulating layer, preventing substances ejected during thermal runaway of the battery cells 31 from damaging the insulating layer. This helps reduce the risk of insulation failure between the battery cells 31 and the liquid cooling plate 21 due to damage to the insulating layer (e.g., scratches). According to a second aspect of the present disclosure, an electrical device is provided, comprising a battery pack 100. The electrical device may further comprise an electrical device body, and the battery pack 100 may be used to power the electrical device body.

[0080] Here, the electric device may be a vehicle, or any other device suitable for using the battery pack 100 , and this disclosure does not limit this.

[0081] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0083] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery pack, characterized in that: The battery pack includes a protective member, a battery cell and a supporting member; The support component is provided with an escape opening, and the escape opening is arranged corresponding to the explosion-proof valve of the battery cell; The protective member includes a main body and at least one annular portion, the annular portion is connected to the main body, the main body is arranged between the support component and the battery cell, and an opening is provided on the main body, the opening is used to connect the valve port of the explosion-proof valve with the air inlet end of the internal space of the annular portion; The annular portion extends into the escape opening and at least partially blocks the inner wall of the escape opening along the radial direction of the escape opening, and a gap exists between at least a portion of the outer peripheral wall of the annular portion and the inner wall of the escape opening.

2. The battery pack according to claim 1, wherein: There is no contact portion between the outer peripheral wall of the annular portion and the inner wall of the escape opening; The width of the gap between the outer peripheral wall of the annular portion and the inner wall of the avoidance opening is 3 mm to 6 mm.

3. The battery pack according to claim 1, wherein: The minimum width of the gap between the outer peripheral wall of the annular portion and the inner wall of the avoidance opening is a first value, and the axial length of the avoidance opening is a second value; The first value is greater than or equal to the second value.

4. The battery pack according to claim 1, wherein: The shape of the axial cross section of the annular portion is adapted to the shape of the axial cross section of the escape opening.

5. The battery pack according to claim 1, wherein: The material used for the protective element is insulating material.

6. The battery pack according to claim 1, wherein: A blocking portion is provided at one end of the annular portion away from the main body portion, and the blocking portion is used to close one end of the internal space of the annular portion; Furthermore, the blocking portion is configured to be separable from the annular portion under the action of the gas in the explosion-proof valve.

7. The battery pack according to claim 1, wherein: The first end of the annular portion is connected to the main body portion, the annular portion includes a diameter-changing portion, and one end of the diameter-changing portion extends to a second end of the annular portion opposite to the first end; The inner diameter of the diameter-changing portion gradually increases in a direction from the first end to the second end.

8. The battery pack according to claim 1, wherein: The first end of the annular portion is connected to the main body portion, the annular portion includes a diameter-changing portion, and one end of the diameter-changing portion extends to a second end of the annular portion opposite to the first end; The inner diameter of the diameter-changing portion gradually decreases in a direction from the first end to the second end.

9. The battery pack according to any one of claims 1 to 8, characterized in that: There are a plurality of annular portions, and the plurality of annular portions are arranged on the main body portion at intervals in the first direction.

10. The battery pack according to claim 9, characterized in that: The main body is configured as a strip extending along the first direction.

11. The battery pack according to claim 9, characterized in that: The number of the battery cells and the number of the protective members are both plural, and the battery pack includes a plurality of battery cell groups arranged along the second direction; Each battery cell group includes a plurality of battery cells arranged along the first direction, and each of the protective members corresponds to one of the battery cell groups; A plurality of the protection members are arranged at intervals along the second direction, and each of the annular portions on each of the protection members corresponds to an explosion-proof valve of the battery cell.

12. The battery pack according to any one of claims 1 to 8, characterized in that: The supporting component includes a liquid cooling plate located at the bottom of the battery cell, and the escape port is provided on the liquid cooling plate.

13. An electrical device, characterized in that: The electric device includes a battery pack according to any one of claims 1 to 12.

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