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 and an exhaust channel communicated with the avoiding opening, the avoiding opening is used for allowing gas of an explosion-proof valve of the battery monomer to pass through, and the exhaust channel is located in the supporting part; the exhaust channel is suitable for being communicated with the outside of the battery pack, the protection part comprises a first part and a second part, the first part is located in the avoiding opening and is constructed to be an annular part to shield the inner wall of the avoiding opening, and the second part is located in the exhaust channel. The first part of the protection piece is constructed into an annular piece and plays a role in shielding and protecting the inner wall of the avoiding opening. The second part is located in the exhaust channel and can prevent gas from flowing around to damage peripheral parts near the explosion-proof valve, so that the peripheral parts near the explosion-proof valve can be protected, the safety of the battery pack is guaranteed, and when the first part is an insulating part, the insulation requirement on the peripheral parts can be reduced, so that the production cost of the peripheral parts is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, 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 electrical device to at least partially solve the technical problems existing in the related art.

[0004] In order to achieve the above object, the present disclosure provides a battery pack, which includes a protective member, a battery cell and a supporting member;

[0005] The support component is provided with a relief opening and an exhaust passage communicating with the relief opening, wherein the relief opening is used for allowing gas from the explosion-proof valve of the battery cell to pass through, and the exhaust passage is located inside the support component and is adapted to communicate with the outside of the battery pack;

[0006] The protective member includes a first portion and a second portion. The first portion is located in the avoidance opening and is configured as an annular member to shield an inner wall of the avoidance opening. The second portion is located in the exhaust passage.

[0007] Optionally, the exhaust passage has a first inner wall and a second inner wall opposite to each other along a first direction, and one end of the avoidance port extends to the first inner wall;

[0008] One end of the second portion away from the first portion contacts the second inner wall.

[0009] Optionally, the second portion is configured as an annular portion, and an opening is provided on the second portion for communicating with the exhaust passage and the interior space of the second portion, and the interior space of the second portion is communicated with the interior space of the first portion.

[0010] Optionally, one end of the opening extends to an end surface of the second part away from an end of the first part.

[0011] Optionally, the second portion is configured to be compressed along the first direction when the pressure reaches a preset value.

[0012] Optionally, along the first direction, at least part of the second portion is elastic.

[0013] Optionally, along the first direction, at least part of the second portion is corrugated.

[0014] Optionally, the first part is made of insulating material.

[0015] Optionally, the inner diameter of the second part gradually increases along the direction from the first part to the second part.

[0016] Optionally, the outer diameter of the second portion gradually increases.

[0017] Optionally, the inner diameter of the first part is equal to the inner diameter of the second part, and the outer diameter of the first part is equal to the outer diameter of the second part; or,

[0018] Along the direction from the first part to the second part, the inner diameter of the second part gradually decreases, and the outer diameter of the second part gradually decreases.

[0019] Optionally, the protective member further includes a connecting portion connected to the first portion, and the connecting portion is overlapped with the supporting component.

[0020] Optionally, the protective element is integrated into the battery cell; or,

[0021] The protective element is integrated with the supporting component.

[0022] Optionally, the supporting component includes a liquid cooling plate and a bottom guard plate, the exhaust channel is provided between the bottom guard plate and the liquid cooling plate, and the avoidance port is provided on the liquid cooling plate.

[0023] According to a second aspect of the present disclosure, there is provided an electric device comprising the battery pack.

[0024] The above technical solution provides a protective member. The first portion of the protective member is constructed as an annular member that shields and protects the inner wall of the escape opening. Furthermore, the second portion, located within the exhaust passage, guides the gas discharged from the explosion-proof valve to prevent it from escaping and damaging surrounding components near the explosion-proof valve. This protects the surrounding components, helping to prevent gas and high-temperature conductive materials emitted from the explosion-proof valve of the battery cell from damaging supporting components, thereby ensuring the safety of the battery pack.

[0025] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0027] Figure 1 is a schematic structural diagram of various components of a battery pack provided in an exemplary embodiment of the present disclosure in an exploded state;

[0028] Figure 2 is a schematic top view of a battery pack provided in accordance with an exemplary embodiment of the present disclosure;

[0029] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0030] Figure 4 yes Figure 3 An enlarged schematic diagram of part B;

[0031] Figure 5 is a schematic structural diagram of a protective element provided by an exemplary embodiment of the present disclosure;

[0032] Figure 6 yes Figure 5 sectional view of

[0033] Figure 7 is a schematic structural diagram of a protective element provided in another exemplary embodiment of the present disclosure;

[0034] Figure 8 yes Figure 7 sectional view of

[0035] Figure 9 is a cross-sectional view of a protective element provided in accordance with another exemplary embodiment of the present disclosure;

[0036] Figure 10 is a cross-sectional view of a protective element provided in accordance with another exemplary embodiment of the present disclosure;

[0037] Figure 11 Schematic diagram of the structure of a protective member with an opening provided in an exemplary embodiment of the present disclosure.

[0038] Description of Reference Numerals

[0039] 100. Battery pack, 10. Protective part, 11. First part, 12. Second part, 121. Opening, 13. Connecting part, 20. Support component, 21. Liquid cooling plate, 211. Avoidance port, 22. Bottom guard plate, 23. Exhaust channel, 231. First inner wall, 232. Second inner wall, 30. Battery cell, 31. Explosion-proof valve, 40. Frame, 50. Upper cover. DETAILED DESCRIPTION

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

[0041] It should be understood that in the present disclosure, unless otherwise stated, the directions or positional relationships indicated by directional words such as "upper" and "lower" are defined based on the drawing directions shown in the corresponding drawings. They are 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 specific direction, specific directional structure and operation. Therefore, they cannot be understood as limiting the present disclosure. The terms "inside" and "outside" can refer to the inside and outside of the corresponding structural outline. Among them, the "first direction" is such as Figure 4 In the first direction shown. It should be noted that the terms "first," "second," "third," etc., are used to distinguish one element from another and do not have sequential or importance implications. In the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same element.

[0042] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; and they may refer to direct connections or indirect connections via an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0043] The present disclosure provides a battery pack 100, such as Figures 1 to 11 As shown, the battery pack 100 includes a protective member 10, a battery cell 30 and a support component 20. The support component 20 is provided with a bypass port 211 and an exhaust channel 23 connected to the bypass port 211. The bypass port 211 is used to allow gas from the explosion-proof valve 31 of the battery cell 30 to pass through. For example, the bypass port 211 is used to allow high-temperature mixed gas discharged through the explosion-proof valve 31 when the battery cell 30 has thermal runaway. The exhaust channel 23 is located inside the support component 20. The exhaust channel 23 is suitable for communicating with the outside of the battery pack 100. The protective member 10 includes a first part 11 and a second part 12. The first part 11 is located in the bypass port 211 and is constructed as a ring-shaped member to cover the inner wall of the bypass port 211. The second part 12 is located in the exhaust channel 23.

[0044] By the above technical solution, the first part 11 of the protection piece 10 is configured as a ring-shaped piece that can shield the inner wall of the avoidance opening 211, thereby playing a shielding and protecting role on the inner wall of the avoidance opening 211. Moreover, the second part 12 is located in the exhaust channel 23 and guides the gas discharged by the explosion-proof valve 31, thereby preventing the gas from damaging the surrounding parts (for example, the liquid cooling plate 21 described below) near the explosion-proof valve 31, so as to protect the surrounding parts near the explosion-proof valve 31, and to prevent the explosion-proof valve 31 of the battery monomer 30 from discharging gas and carrying out high-temperature conductive substances to damage the support part 20, thereby ensuring the safety of the battery pack 100.

[0045] When the protection piece 10 is made of a heat insulation material, the protection piece 10 can play a guiding role on the gas discharged by the explosion-proof valve 31 when the battery monomer 30 is pressure released, and can also play a heat insulation role, thereby improving the controllability of thermal runaway, and further ensuring the safety of the battery pack 100.

[0046] In the present disclosure, the first part 11 is arranged inside the avoidance opening 211 and shields the inner wall of the avoidance opening 211. Since the explosion-proof valve 31 of the battery monomer 30 is in communication with the avoidance opening 211 of the support part 20, when the battery monomer 30 is in thermal runaway, the high-temperature conductive substances discharged by the explosion-proof valve 31 will not directly touch the avoidance opening 211 of the support part 20, but will directly touch the first part 11, so as to prevent the high-temperature conductive substances from damaging the insulation layer on the support part 20, to avoid the high-temperature conductive substances from directly contacting the support part 20 to cause short circuit, to avoid the secondary high-voltage arc in the local part of the battery pack 100, to prevent the heat spread in the battery pack 100, and to improve the safety performance of the battery pack 100.

[0047] When the first part 11 is made of an insulating material, the inside of the avoidance opening 211 shielded by the first part 11 can not be provided with an insulation layer, and the first part 11 can serve as an insulation layer for this part to play an insulation role. In this way, the design of the first part 11 not only protects the inner wall of the avoidance opening 211 from being damaged, but also serves as an insulation piece between the high-temperature conductive substances discharged by the explosion-proof valve 31 and the avoidance opening 211 of the support part 20, thereby preventing short circuit between them. That is, the protection piece not only protects the surrounding parts, but also reduces the requirements for the insulation and heat insulation of the surrounding parts, thereby reducing the production cost of the surrounding parts.

[0048] In the present disclosure, the second part 12 is arranged in the exhaust channel 23 and is used to guide the gas discharged from the first part 11, so that the gas and the high-temperature conductive substances discharged from the explosion-proof valve 31 can be discharged along the guidance of the second part 12, and the jet path of the high-temperature conductive substances after being discharged from the first part 11 can be limited, thereby reducing the damage to the surrounding parts (for example, the liquid cooling plate 21 described below) near the explosion-proof valve 31.

[0049] In the present disclosure, the exhaust channel 23 may have a first inner wall 231 and a second inner wall 232 opposite to each other along a first direction, one end of the avoidance port 211 extends to the first inner wall 231 to communicate with the exhaust channel 23, and one end of the second part 12 away from the first part 11 contacts the second inner wall 232. In this arrangement, since one end of the avoidance opening 211 extends to the first inner wall 231, the first part 11 is arranged in the avoidance opening 211, and one end of the second part 12 is in contact with the second inner wall 232, the second part 12 can serve as a support member between the first inner wall (for example, the bottom wall of the liquid cooling plate 21 hereinafter) and the second inner wall 232 (for example, the top wall of the bottom guard plate 22 hereinafter), playing the role of supporting the first inner wall 231 and the second inner wall 232, which can enhance the supporting effect of the supporting component 20 on the battery cell 30, and can enhance the collision resistance of the battery pack 100 against the collision force from the direction of the second inner wall 232 (such as from the bottom guard plate 22), which is beneficial to protecting the battery cell 30. In the embodiment in which the first inner wall 231 is the bottom wall of the liquid cooling plate 21, it can also protect the liquid cooling plate 21.

[0050] It should be understood that the first direction refers to the direction relative to the first inner wall 231 and the second inner wall 232, that is, the direction of the line connecting the first inner wall 231 and the second inner wall 232. The first direction can be any appropriate direction and is not limited in this disclosure. For example, the first direction can be the direction of the distance between the liquid cooling plate 21 and the bottom guard plate 22 of the battery pack 100, that is, the height direction of the exhaust channel 23 (that is, the height direction of the battery pack 100).

[0051] In the present disclosure, the second portion 12 can be configured as an annular portion, and an opening 121 is provided on the second portion 12, connecting the exhaust passage 23 with the interior space of the second portion 12. The interior space of the second portion 12 is connected to the interior space of the first portion 11. This configuration ensures that the gas discharged from the explosion-proof valve 31 can enter the exhaust passage 23 through the protective member 10 while acting as a buffer, thereby facilitating its discharge outside the battery pack 100.

[0052] In the present disclosure, one end of the opening 121 can extend to the end surface of the second portion 12 away from the first portion 11. This configuration can facilitate the production of the opening 121 and can also keep the opening 121 as far away from the first inner wall 231 and the liquid cooling plate 21 as possible.

[0053] In some embodiments, as Figure 11 As shown, the circumferential width dimension of the opening 121 in the second part 12 can be equal to half of the circumferential dimension of the second part 12 to form a larger opening 121, thereby ensuring the supporting strength of the second part 12 while achieving the discharge of gas from the explosion-proof valve 31 to the exhaust channel 23.

[0054] In some embodiments, the number of openings 121 can be set to multiple, and the multiple openings 121 can be arranged at intervals along the circumference of the second part 12, so as to ensure the supporting strength of the second part 12 while achieving the discharge of gas from the explosion-proof valve 31 to the exhaust channel 23.

[0055] In the present disclosure, the second portion 12 can be configured to be compressed along a first direction (e.g., the height direction of the exhaust passage 23) when the pressure reaches a preset value. This configuration allows the second portion 12 to act as a buffer between the first inner wall 231 and the second inner wall 232. When the first inner wall 231 and the second inner wall 232 are squeezed or collided, the protective member 10 can absorb some of the impact or squeezing force, thereby protecting the first inner wall 231 or the second inner wall 232, and thus protecting the battery cells 30 and the liquid cooling plate 21.

[0056] The pressure reaching the preset value may be a pressure value caused by thermal runaway of the battery cell 30 .

[0057] In the present disclosure, at least a portion of the second portion 12 may be elastic along a first direction (eg, a height direction of the exhaust passage 23 ), which is conducive to the second portion 12 absorbing a portion of the impact force or the extrusion force.

[0058] For example, a part of the structure of the second portion 12 may be made of elastic material.

[0059] In this disclosure, Figure 6 As shown, along the first direction (such as the height direction of the exhaust channel 23), at least part of the second portion 12 may be corrugated. This configuration is conducive to the second portion 12 absorbing part of the impact force or extrusion force.

[0060] For example, when the second portion 12 is made of a hard, brittle material, the crests and troughs of the corrugated shape easily break, thereby absorbing impact or squeezing forces. Alternatively, when the second portion 12 is made of an elastic material, the corrugated shape can increase the elastic material's deformability, thereby enhancing the second portion 12's cushioning capacity.

[0061] In this disclosure, Figure 5 As shown, the inner diameter of the second portion 12 can gradually increase from the first portion 11 toward the second portion 12, that is, the hollow portion of the second portion 12 for guiding gas is configured as a trumpet-shaped gas guiding channel. This facilitates the discharge of gas ejected from the explosion-proof valve 31 and the high-temperature conductive material carried away.

[0062] In this disclosure, Figures 5 to 8As shown, the outer diameter of the second portion 12 can be gradually increased, that is, the outer wall of the second portion 12 defines a trumpet-shaped profile. This arrangement maintains a consistent thickness of the second portion 12, facilitating the manufacturing process of the second portion 12.

[0063] In the present disclosure, in some other embodiments of the present disclosure, see Figure 10 , the inner diameter of the first part 11 can be equal to the inner diameter of the second part 12, and the outer diameter of the first part 11 can be equal to the outer diameter of the second part 12, so that the production of the protective member 10 can be facilitated. Or, as Figure 9 As shown, the inner diameter of the second portion 12 gradually decreases as it moves from the first portion 11 toward the second portion 12, while the outer diameter of the second portion 12 also gradually decreases. This arrangement ensures that the gas ejected from the protective member 10 by the explosion-proof valve 31 and the high-temperature conductive material carried by it only cause impact damage to a small portion of the support member 20 (corresponding to the opening of the second portion 12), preventing damage to a large area of ​​surrounding components.

[0064] In this disclosure, Figures 4 to 11 As shown, the protective member 10 further includes a connecting portion 13 connected to the first portion 11, and the connecting portion 13 is overlapped with the support component 20. In this way, the connection between the protective member 10 and the support component 20 or the battery cell 30 can be facilitated.

[0065] In some embodiments, as Figures 5 to 11 As shown, the connection portion 13 can be configured as a connection flange, so that the connection between the connection portion 13 and the upper surface of the support component 20 can be facilitated.

[0066] In the present disclosure, the protective member 10 can be integrated into the battery cell 30, or the protective member 10 can be integrated into the support component 20. In this way, as part of the battery cell 30 or the support component 20 during the assembly process of the battery pack 100, the protective member 10 can facilitate the assembly of the battery pack 100, reduce the assembly process, and improve assembly efficiency.

[0067] In some embodiments, the protective member 10 can be designed as an independent part. When assembling the battery pack 100 , a protective member 10 is used in the area where each battery cell 30 interfaces with the structural components of the battery pack 100 to ensure independent protection.

[0068] In the present disclosure, the protective member 10 may be made of mica sheets, aluminum alloy with an insulating layer sprayed on the surface, high-temperature resistant polymer materials, composite materials, etc., and the present disclosure does not impose any restrictions on this.

[0069] In the present disclosure, the specific structure of the support component 20 is not limited, and the support component 20 can include a liquid cooling plate 21 and a bottom guard plate 22, and the bottom guard plate 22 is provided with an exhaust passage 23 with the liquid cooling plate 21. The liquid cooling plate 21 is provided with a relief port 211.

[0070] In the present disclosure, the specific arrangement position of the support component 20 is not limited, and the support component 20 can be located at the bottom of the battery monomer 30 or at the side of the battery monomer 30, and the present disclosure is not limited.

[0071] The liquid cooling plate 21 is arranged at the bottom of the battery monomer 30 and used for heat exchange with the battery monomer 30, for example, cooling and heating the battery monomer 30.

[0072] As shown in Figure 4 The liquid cooling plate 21 can be arranged with the bottom guard plate 22 to form an exhaust passage 23, which can be in communication with the outside of the battery pack 100, for example, the exhaust passage 23 can be in communication with the exhaust valve on the battery shell (such as the side wall of the frame 40), so that when the battery monomer 30 is in thermal runaway, the gas in the battery monomer 30 can be discharged to the outside of the battery pack 100 through the explosion-proof valve 31, the relief port 211 and the exhaust passage 23.

[0073] According to a second aspect of the present disclosure, a kind of electric equipment is provided, including the battery pack 100. The electric equipment can also include the main body of the electric equipment, and the battery pack 100 can be used to power the main body of the electric equipment.

[0074] Here, the electric equipment can be a vehicle, or any other suitable device that uses the battery pack 100, and the present disclosure is not limited in this regard.

[0075] The vehicle can be a pure electric vehicle, or a hybrid vehicle, and the present disclosure is not limited in this regard.

[0076] The preferred embodiments of the present disclosure are described in detail above in conjunction with the drawings, but the present disclosure is not limited to the specific details in the above-described 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 belong to the protection scope of the present disclosure.

[0077] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0078] Furthermore, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as disclosed in 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 a relief opening and an exhaust passage communicating with the relief opening, wherein the relief opening is used for allowing gas from the explosion-proof valve of the battery cell to pass through, and the exhaust passage is located inside the support component and is adapted to communicate with the outside of the battery pack; The protective member includes a first portion and a second portion. The first portion is located in the avoidance opening and is configured as an annular member to shield an inner wall of the avoidance opening. The second portion is located in the exhaust passage.

2. The battery pack according to claim 1, wherein: The exhaust passage has a first inner wall and a second inner wall opposite to each other along a first direction, and one end of the avoidance port extends to the first inner wall; One end of the second portion away from the first portion contacts the second inner wall.

3. The battery pack according to claim 2, wherein: The second portion is configured as an annular portion, and an opening is provided on the second portion for communicating the exhaust passage and an inner space of the second portion, and the inner space of the second portion is communicated with the inner space of the first portion.

4. The battery pack according to claim 3, characterized in that: One end of the opening extends to an end surface of the second portion away from an end of the first portion.

5. The battery pack according to claim 2, wherein: The second portion is configured to be compressed along the first direction when the pressure reaches a preset value.

6. The battery pack according to claim 5, characterized in that: At least a portion of the second portion is elastic along the first direction.

7. The battery pack according to claim 5, characterized in that: At least a portion of the second portion is corrugated along the first direction.

8. The battery pack according to claim 1, wherein: The material used for the first part is insulating material.

9. The battery pack according to any one of claims 1 to 8, characterized in that: Along the direction from the first part to the second part, the inner diameter of the second part gradually increases.

10. The battery pack according to claim 9, characterized in that: The outer diameter of the second portion gradually increases.

11. The battery pack according to any one of claims 1 to 8, characterized in that: The inner diameter of the first portion is equal to the inner diameter of the second portion, and the outer diameter of the first portion is equal to the outer diameter of the second portion; or, Along the direction from the first part to the second part, the inner diameter of the second part gradually decreases, and the outer diameter of the second part gradually decreases.

12. The battery pack according to any one of claims 1 to 8, characterized in that: The protective element further includes a connecting portion connected to the first portion, and the connecting portion is connected to the supporting component.

13. The battery pack according to any one of claims 1 to 8, characterized in that: The protective member is integrated into the battery cell; or, The protective element is integrated with the supporting component.

14. The battery pack according to any one of claims 1 to 8, characterized in that: The supporting component includes a liquid cooling plate and a bottom guard plate. The exhaust passage is provided between the bottom guard plate and the liquid cooling plate. The avoidance port is provided on the liquid cooling plate.

15. An electrical device, characterized in that: Comprising a battery pack according to any one of claims 1-14.

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