Explosion-proof valve, battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides an anti-explosion valve, a battery pack and electric equipment, the anti-explosion valve comprises an anti-explosion valve main body, the anti-explosion valve main body is provided with a guide part, and when the battery pack is in thermal runaway, the guide part is used for enabling the anti-explosion valve main body to move on the edge of an exhaust port in a box body, so that the anti-explosion valve main body is separated from the box body. Therefore, the explosion-proof valve main body is separated from the box body of the battery pack under the action of the guide part, so that the exhaust port of the battery pack is smooth, the exhaust resistance is reduced, the internal pressure of the battery pack is quickly released, and the safety of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to an explosion-proof valve, a battery pack and an electric device. BACKGROUND

[0002] With the continuous development of new energy vehicles, the safety of new energy is also getting higher and higher. Especially the safety of electric vehicle batteries.

[0003] In the related art, the battery pack of an electric vehicle has an exhaust passage, and an explosion-proof valve is arranged on the battery pack and blocks the exhaust passage. The explosion-proof valve is usually opened by a needle or a spring, so that the explosion-proof valve opens to discharge the gas in the battery pack, avoiding safety accidents caused by the rupture of the battery pack.

[0004] However, the explosion-proof valve occupies the internal space of the exhaust passage, resulting in poor exhaust effect of the battery pack and reduced safety of the battery pack. CONTENT OF THE UTILITY MODEL

[0005] The present application provides an explosion-proof valve, a battery pack and an electric device. The explosion-proof valve can be separated from the battery pack, reducing the exhaust resistance of the battery pack through the exhaust port, thereby improving the safety of the battery pack.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] In a first aspect, the present application provides an explosion-proof valve applied to a battery pack, wherein the box body of the battery pack has an exhaust port; and the explosion-proof valve comprises:

[0008] The explosion-proof valve body has a guide portion.

[0009] When the battery pack is in thermal runaway, the guide portion is used for moving the explosion-proof valve body on the exhaust port blocking edge of the box body, so that the explosion-proof valve body is separated from the box body.

[0010] As an optional implementation, the explosion-proof valve body has a buckle, and the explosion-proof valve body is detachably connected with the battery pack through the buckle.

[0011] The guide portion is arranged on the buckle.

[0012] As an optional implementation, the buckle has a first surface, and the first surface forms the guide portion.

[0013] The first surface comprises at least one of a flat surface and a curved surface.

[0014] As an optional implementation, the first surface is a flat surface; and along the axial direction of the explosion-proof valve body, the first surface is arranged obliquely relative to the axis of the explosion-proof valve body.

[0015] As an optional implementation, the first surface and the axis of the explosion-proof valve body have an included angle.

[0016] The included angle is greater than or equal to 45°, and the included angle is less than or equal to 90°.

[0017] As an optional implementation, the number of buckles is at least two, and the at least two buckles are arranged on the explosion-proof valve body in the circumferential direction of the explosion-proof valve body.

[0018] As an optional implementation, the explosion-proof valve further comprises a sealing member, and the sealing member is sleeved on the explosion-proof valve body.

[0019] When the explosion-proof valve body and the box are connected, the sealing member is sealingly connected between the explosion-proof valve body and the box.

[0020] As an optional implementation, the explosion-proof valve further comprises a reinforcing member, and the reinforcing member is arranged on the explosion-proof valve body.

[0021] As an optional implementation, the reinforcing member is a plurality of reinforcing members, and the plurality of reinforcing members are arranged on the explosion-proof valve body in the circumferential direction of the explosion-proof valve body.

[0022] As an optional implementation, the sealing member and the guide portion are arranged in the axial direction of the explosion-proof valve body.

[0023] As an optional implementation, the guide portion and the surface opposite to the sealing member have a spacing in the axial direction of the explosion-proof valve body, and the spacing is 2mm-4mm.

[0024] As an optional implementation, the explosion-proof valve further comprises a balance valve; the explosion-proof valve body has a communication cavity; and the balance valve is arranged on the explosion-proof valve body.

[0025] When the explosion-proof valve body and the box are connected, the balance valve is located on the side of the explosion-proof valve body away from the box, and the balance valve is used to control the communication between the communication cavity and the external air.

[0026] As an optional implementation, the explosion-proof valve body has a connecting hole, and the connecting hole is located on the explosion-proof valve body.

[0027] The connecting hole and the communication cavity are in communication, and at least part of the balance valve is arranged in the connecting hole.

[0028] The explosion-proof valve provided by the application comprises an explosion-proof valve body, the explosion-proof valve body has a guide portion, and the guide portion is used for moving the edge of an exhaust port on a box body when the battery pack is out of control, so that the explosion-proof valve body is separated from the box body. In this way, when the battery pack is out of control, the explosion-proof valve body can quickly separate from the exhaust port of the battery pack through the guide portion and open the exhaust port, so that the exhaust port is unobstructed, the exhaust assembly is reduced, and the internal pressure of the battery pack is quickly released, so that explosion or fire of the battery pack is prevented, and the safety of the battery pack is further improved.

[0029] In a second aspect, the application provides a battery pack, comprising: a box body and the explosion-proof valve in the first aspect. The box body has an exhaust port. The explosion-proof valve body of the explosion-proof valve is detachably arranged on the box body to open or close the exhaust port.

[0030] The battery pack provided by the application can improve the safety of the battery pack because it comprises the battery pack in the first aspect.

[0031] In a third aspect, the application provides a power consumption device, comprising: the battery pack in the second aspect.

[0032] The power consumption device provided by the application can improve the safety of the power consumption device because it comprises the battery pack in the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0034] Figure 1 The schematic view of the explosion-proof valve provided by the embodiment of the application;

[0035] Figure 2 The front view of the explosion-proof valve provided by the embodiment of the application;

[0036] Figure 3 The A-A sectional view of Figure 2 ;

[0037] Figure 4 The explosion view of the explosion-proof valve provided by the embodiment of the application;

[0038] Figure 5 The bottom view of the explosion-proof valve provided by the embodiment of the application Figure 1 ;

[0039] Figure 6 The bottom view of the explosion-proof valve provided by the embodiment of the applicationFigure 2 ;

[0040] Figure 7 A bottom view of the explosion-proof valve provided by the embodiments of the present application Figure 3 .

[0041] Legend:

[0042] 100 - explosion-proof valve;

[0043] 110 - explosion-proof valve body; 111 - guide portion; 112 - buckle; 113 - communication cavity; 114 - connecting hole; 115 - protective cover;

[0044] 120 - sealing element;

[0045] 130 - reinforcing element;

[0046] 140 - balance valve. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0048] The embodiments of the present application provide an explosion-proof valve 100 applied to a battery pack. The battery pack can be applied to an electric vehicle, an energy storage system, etc., and the embodiments of the present application do not make any requirements thereon.

[0049] During use of the battery pack, gas will be generated inside the battery pack, and thus the gas inside the battery pack needs to be discharged to reduce the situation of swelling and bulging of the battery pack. Therefore, the battery pack has an exhaust port, which communicates the inside and outside of the battery pack, and the gas inside the battery pack is discharged through the exhaust port.

[0050] When the battery pack is out of control, the inside of the battery pack is rapidly heated, and the pressure inside the battery pack is rapidly increased. Through the setting of the exhaust port, the battery pack can be rapidly depressurized to prevent the battery pack from rapidly swelling and exploding, so as to improve the safety of the battery pack.

[0051] In some embodiments, the exhaust port can be one or more, and the embodiments of the present application do not make any limitation thereon.

[0052] It is understandable that if the exhaust port is kept in communication with the outside of the battery pack for a long time during use, the battery pack is prone to liquid leakage, internal electrolyte contamination and other conditions, which reduces the safety of the battery pack and shortens the service life of the battery pack.

[0053] In some embodiments, an explosion-proof valve 100 can be provided on the battery pack, which can block the exhaust port through the explosion-proof valve 100. For example, the explosion-proof valve 100 includes an explosion-proof valve body 110, which is arranged on the battery pack to block the exhaust passage.

[0054] In some embodiments, the explosion-proof valve body 110 has a receiving cavity in communication with the opening of the battery pack, and a spike and an explosion-proof membrane can be arranged in the receiving cavity. After the battery pack overheats, the explosion-proof membrane is deformed and pierced by the spike, the exhaust port is in communication with the outside air through the receiving cavity, and the rapid pressure relief of the battery pack is achieved. Alternatively, a spring structure can be arranged in the explosion-proof valve body 110. After the battery pack overheats, the exhaust port is in communication with the outside air through the receiving cavity after the spring structure deforms, and the rapid pressure relief of the battery pack is achieved. However, after the battery pack overheats, the temperature inside the battery pack rises rapidly, and the pressure in the battery pack rises sharply. Such an explosion-proof valve 100 has a complex structure, occupies part of the space of the exhaust port, and has a large resistance to the exhaust of the battery pack through the explosion-proof valve 100, poor exhaust effect, and the receiving cavity of the explosion-proof valve 100 is easily blocked, and the battery pack is prone to explosion.

[0055] To solve the above problems, refer to Figures 1-3 The explosion-proof valve body 110 in the embodiments of the present application has a guide portion 111, which can be arranged on the peripheral side wall of the explosion-proof valve body 110. The guide portion 111 can be used to guide the explosion-proof valve body 110 to slide into or away from the battery pack, so as to close and open the exhaust port. When the battery pack overheats, the guide portion 111 is used to move the explosion-proof valve body 110 on the edge of the exhaust port of the box body, so as to separate the explosion-proof valve body 110 from the box body.

[0056] In this embodiment, the explosion-proof valve body 110 can be snap-fitted onto the battery pack, facilitating the assembly of the explosion-proof valve body 110 and the battery pack. During assembly, the explosion-proof valve body 110 can slide into the battery pack via the guide part 111, making installation easier. Simultaneously, the connection between the explosion-proof valve body 110 and the battery pack closes the vent, improving the battery pack's sealing and preventing external moisture and impurities from entering, thus enhancing battery pack safety. In the event of thermal runaway in the battery pack, the explosion-proof valve body 110, under the action of the guide part 111, detaches from the battery pack's vent and opens the vent, allowing it to communicate with external air. The unobstructed vent reduces exhaust resistance, rapidly releasing internal pressure and preventing explosion or fire, thereby improving battery pack safety.

[0057] In some implementations, see Figure 1 , Figure 2 and Figure 3 The explosion-proof valve body 110 has a buckle 112, and the explosion-proof valve body 110 is detachably connected to the battery pack through the buckle 112; the guide part 111 is disposed on the buckle 112.

[0058] In this embodiment, the latch 112 on the explosion-proof valve body 110 ensures that the explosion-proof valve body 110 is securely fixed to the battery pack under normal operating conditions, preventing the explosion-proof valve 100 from loosening or falling off. It is easy to understand that the explosion-proof valve body 110 and the battery pack are connected by the latch 112, forming a detachable connection. In the event of thermal runaway of the battery pack, the temperature and pressure inside the battery pack act together on the explosion-proof valve body 110, allowing the explosion-proof valve body 110 to quickly detach from the battery pack through the deformation and loosening of the latch 112, and rapidly open the vent, enabling the battery pack to quickly release gas through the vent, thereby delaying the explosion of the battery pack.

[0059] In this embodiment, the guide part 111 is set on the buckle 112, which can better utilize the structure of the explosion-proof valve 100. At the same time, it facilitates the production of the explosion-proof valve 100 and the assembly of the explosion-proof valve 100 and the battery pack, thereby improving the production efficiency of the battery pack.

[0060] In some embodiments, the snap fastener 112 has a first surface that forms a guide portion 111. The first surface includes at least one of a flat surface and a curved surface.

[0061] In the embodiments of the present application, the flat surface and / or the curved surface can provide different sliding paths to ensure that the explosion-proof valve body 110 can reduce the friction between the explosion-proof valve body 110 and the battery pack during the process of sliding into the battery pack and closing the exhaust port, prevent the explosion-proof valve body 110 and the battery pack from being stuck, and thus facilitate the assembly of the explosion-proof valve body 110 and the battery pack. Similarly, the flat surface and / or the curved surface can ensure that the process of the explosion-proof valve body 110 separating from the battery pack is smoother, reduce the friction between the explosion-proof valve body 110 and the battery pack, prevent the explosion-proof valve body 110 and the battery pack from being stuck, and thus facilitate the explosion-proof valve body 110 to separate from the battery pack and open the exhaust port, and further facilitate the battery pack to quickly release the internal pressure of the battery pack through the unobstructed exhaust port, and prevent the battery pack from exploding or catching fire.

[0062] It should be noted that the first surface can be only a flat surface, or only a curved surface, or the first surface can be partially a flat surface and partially a curved surface. The curved surface can be an arc-shaped curved surface, etc. The embodiments of the present application do not make specific requirements thereon.

[0063] In some embodiments, referring to Figure 3 , the first surface can be a flat surface structure; and the first surface is arranged to be inclined relative to the axis of the explosion-proof valve body 110 along the axial direction of the explosion-proof valve body 110.

[0064] For example, the extension direction of the first surface and the extension direction of the axis of the explosion-proof valve body 110 have an included angle (α), the included angle (α) is greater than or equal to 45°, and the included angle (α) is less than or equal to 90°.

[0065] The first surface can be arranged to be inclined relative to the explosion-proof valve body 110, which can adjust the structure of the explosion-proof valve body 110, thereby adjusting the stress of the explosion-proof valve body 110 when separating from the battery pack, reducing the separation force between the explosion-proof valve body 110 and the battery pack, so that the explosion-proof valve body 110 separates from the battery pack and the exhaust port is quickly opened. When the explosion-proof valve body 110 slides into the battery pack and closes the exhaust port, the flat surface structure can increase the contact between the explosion-proof valve body 110 and the battery pack, improve the sealing performance of the battery pack, and improve the safety of the battery pack.

[0066] In some embodiments, the included angle (α) is greater than or equal to 45°, and the included angle (α) is less than or equal to 90°. For example, the included angle (α) can be 45°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc. The embodiments of the present application do not make specific requirements thereon.

[0067] The greater the included angle (a), the higher the fit degree of the first surface and the battery pack. In the exhaust port closed state, the greater included angle (a) can help the explosion-proof valve body 110 to press more tightly on the exhaust port, preventing the connection between the explosion-proof valve body 110 and the battery pack from loosening, thereby improving the sealing performance of the battery pack and preventing the battery pack from leaking. The smaller the included angle (a), the smaller the fit degree of the first surface and the battery pack, which can reduce the force applied by the battery pack to the explosion-proof valve body 110, facilitate the explosion-proof valve body 110 to separate from the battery pack through the guide portion 111, and open the exhaust port, thereby quickly relieving the battery pack to delay the explosion of the battery pack and further prevent secondary hazards caused by the explosion of the battery pack.

[0068] In some embodiments, the number of buckles 112 is at least two, and the at least two buckles 112 are arranged on the explosion-proof valve body 110 in a circumferential direction of the explosion-proof valve body 110.

[0069] For example, referring to Figure 5 , the number of buckles 112 can be three, and the three buckles 112 are arranged on the explosion-proof valve body 110 in a circumferential direction of the explosion-proof valve body 110.

[0070] In some embodiments, the explosion-proof valve body 110 is a cylindrical structure, and the three buckles 112 can be uniformly spaced and distributed on the circumferential side of the explosion-proof valve body 110, and the included angle between the two adjacent buckles 112 is 120°.

[0071] In some embodiments, referring to Figure 6 , the number of buckles 112 can be four, and the four buckles 112 are arranged on the explosion-proof valve body 110 in a circumferential direction of the explosion-proof valve body 110. The four buckles 112 can be uniformly spaced and distributed on the circumferential side of the explosion-proof valve body 110, and the included angle between the two adjacent buckles 112 is 90°.

[0072] In some embodiments, referring to Figure 7 , the number of buckles 112 can be six, and the six buckles 112 are arranged on the explosion-proof valve body 110 in a circumferential direction of the explosion-proof valve body 110. The six buckles 112 can be uniformly spaced and distributed on the circumferential side of the explosion-proof valve body 110, and the included angle between the two adjacent buckles 112 is 60°.

[0073] It should be noted that in the embodiments of the present application, the plurality of buckles 112 are distributed on the side of the explosion-proof valve body 110, ensuring that the explosion-proof valve body 110 is uniformly fixed, thereby reducing local stress concentration and potential structural damage. The more the number of buckles 112, the more stable the connection between the explosion-proof valve body 110 and the battery pack, and a reliable sealing connection is formed between the explosion-proof valve body 110 and the battery pack, preventing the battery pack from leaking, and further improving the safety of the battery pack. The fewer the number of buckles 112, the easier it is for the explosion-proof valve body 110 to be separated from the battery pack through the guide part 111 on the buckle 112, so that the battery pack can quickly vent through the exhaust port, delay the explosion of the battery pack, and improve the safety of the battery pack.

[0074] In some embodiments, in combination with Figure 2 , Figure 3 and Figure 4 , the explosion-proof valve 100 further comprises a sealing member 120, which is sleeved on the explosion-proof valve body 110; when the explosion-proof valve body 110 and the box are connected, the sealing member 120 is sealingly connected between the explosion-proof valve body 110 and the box.

[0075] In the embodiments of the present application, the sealing member 120 can be a sealing ring. Through the arrangement of the sealing member 120, the sealing property of the assembled explosion-proof valve 100 and the battery pack is ensured, the liquid leakage of the battery pack is prevented, and the safety of the battery pack is improved.

[0076] Referring to Figure 3 , the explosion-proof valve 100 comprises a protective cover 115, which is arranged on the side of the explosion-proof valve body 110 away from the battery pack, and the side of the protective cover 115 facing the battery pack is provided with a mounting groove for mounting the sealing member 120. It can be understood that the sealing member 120 and the mounting groove are connected in interference fit, and the sealing member 120 forms a fastening force on the explosion-proof valve body 110.

[0077] In order to prevent the explosion-proof valve body 110 from deforming and improve the strength of the explosion-proof valve body 110, in some optional embodiments, the explosion-proof valve 100 further comprises a reinforcing member 130 arranged on the explosion-proof valve body 110.

[0078] It is not difficult to understand that the side of the explosion-proof valve body 110 away from the battery pack is exposed and is easily impacted by the outside. By arranging the reinforcing member 130, the strength of the explosion-proof valve body 110 is improved, thereby avoiding the damage of the explosion-proof valve 100 caused by the deformation of the explosion-proof valve 100, so that the problem of the sealing property of the explosion-proof valve 100 to the battery pack is not caused by the deformation of the explosion-proof valve 100, and the safety and stability of the battery pack are enhanced.

[0079] In some embodiments, in combination with Figures 1-4Multiple reinforcing members 130 are provided along the circumference of the explosion-proof valve body 110, spaced apart. This embodiment improves the overall structural strength and stability of the explosion-proof valve body 110 by providing multiple reinforcing members 130. With evenly distributed reinforcing members 130, the explosion-proof valve 100 can better resist external pressure or impact, reducing the risk of deformation or damage. Furthermore, the spaced arrangement of the reinforcing members 130 helps to distribute stress evenly, reducing stress concentration and thus lowering the risk of material fatigue and fracture, extending the service life of the explosion-proof valve 100.

[0080] It should be noted that the number of reinforcing members 130 can be two, three, four, eight, etc., and this application embodiment does not make specific requirements on the number of reinforcing members 130.

[0081] In some alternative embodiments, the reinforcing member 130 may be a plate-shaped member, and the reinforcing member 130 may be disposed between the peripheral sidewall of the explosion-proof valve body 110 and the protective cover 115.

[0082] In some implementations, see Figure 3 Along the axial direction of the explosion-proof valve body 110, the sealing element 120 and the guide portion 111 are spaced apart. Thus, when the explosion-proof valve 100 is installed in the battery pack housing, the sealing element 120 and the guide portion 111 are located on both sides of the battery pack housing, and the sealing element 120 seals the outer wall of the housing and the explosion-proof valve 100, thereby improving the sealing performance of the battery pack.

[0083] In some embodiments, along the axial direction of the explosion-proof valve body 110, there is a gap between the opposing surfaces of the guide portion 111 and the seal 120, the gap being greater than or equal to 2 mm and less than or equal to 4 mm. Thus, the explosion-proof valve 100 can be applied to battery pack housings of different thicknesses.

[0084] For example, the distance between the guide portion 111 and the seal 120 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc. This application embodiment does not impose specific requirements on this.

[0085] In some implementations, see Figures 2-4 The explosion-proof valve 100 also includes a balancing valve 140; the explosion-proof valve body 110 has a communicating cavity 113; the balancing valve 140 is disposed on the explosion-proof valve body 110; when the explosion-proof valve body 110 is connected to the enclosure, the communicating cavity 113 is connected to the exhaust port of the battery pack, and the balancing valve 140 is located on the side of the explosion-proof valve body 110 away from the enclosure, and the balancing valve 140 is used to control the communication between the communicating cavity 113 and the external air. In this way, through the communication between the balancing valve 140 and the external air, the battery pack can automatically adjust its internal pressure to maintain a balance with the external environmental pressure, thereby effectively alleviating abnormal pressure inside the battery pack and protecting the safety of the battery pack.

[0086] When the battery pack explodes, due to the sharp rise of pressure and temperature in the battery pack, the exhaust path formed by the balance valve 140 cannot exhaust in time, and the explosion-proof valve body 110 will also be separated from the battery pack through the guide part 111, the exhaust port is directly connected with the external air, and the exhaust of the battery pack is completed through the exhaust port to prevent safety accidents caused by the explosion of the battery pack.

[0087] In some embodiments, referring to Figure 2 and Figure 3 , the explosion-proof valve body 110 has a connecting hole 114 located on the explosion-proof valve body 110; the connecting hole 114 is in communication with the communication cavity 113, and at least part of the balance valve 140 is arranged in the connecting hole 114. In the embodiment of the application, the configuration of the balance valve 140 and the connecting hole 114 makes the structure of the explosion-proof valve 100 more compact, which helps to reduce the space ratio of the explosion-proof valve 100. At the same time, the explosion-proof valve body 110 forms a protection effect on the balance valve 140, reducing the influence of the external environment on the balance valve 140, such as dust, moisture or mechanical damage, thereby improving the reliability of the balance valve 140 and prolonging the service life of the balance valve 140.

[0088] The explosion-proof valve 100 provided by the embodiment of the application includes an explosion-proof valve body 110, and the explosion-proof valve body 110 has a guide part 111. When the battery pack is out of control, the guide part 111 is used for moving the edge of the exhaust port on the box body, so that the explosion-proof valve body 110 is separated from the box body. After the explosion-proof valve body 110 and the battery pack are assembled, the exhaust port is closed by the connection between the explosion-proof valve body 110 and the battery pack, the sealing property of the battery pack is improved, and the external moisture and impurities are prevented from entering the inside of the battery pack, thereby improving the safety of the battery pack. When the battery pack is out of control, the explosion-proof valve body 110 is separated from the exhaust port of the battery pack under the action of the guide part 111, and the exhaust port is opened. The exhaust port is in communication with the external air, and there is no obstruction in the exhaust port, the exhaust resistance is reduced, the internal pressure of the battery pack can be quickly released, the explosion or fire of the battery pack is prevented, and the safety of the battery pack is improved.

[0089] In a second aspect, the application provides a battery pack, including: a box body and the explosion-proof valve 100 in the first aspect. The box body has an exhaust port. The explosion-proof valve 100 is detachably arranged on the box body to open or close the exhaust port.

[0090] The battery pack in the embodiment of the application can improve the safety of the battery pack because it includes the battery pack in the first aspect.

[0091] In a third aspect, the application provides a use electric device including the battery pack in the second aspect.

[0092] It should be noted that the power consuming device in the embodiments of the present application can be a vehicle, and the vehicle can be a fuel vehicle, an electric vehicle, or a hybrid vehicle, etc., and the embodiments of the present application do not make specific requirements thereon.

[0093] The power consuming device in the embodiments of the present application can improve the safety of the power consuming device due to the inclusion of the battery pack in the second aspect.

[0094] It should be noted that the terms "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification mean that the described embodiments can include a particular feature, structure, or characteristic, but not necessarily every embodiment. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure, or characteristic in connection with other embodiments whether explicitly described or not.

[0095] Generally, the terms should be understood at least partially by usage in context. For example, terms such as "one or more" as used herein, can be used in either a singular sense or in a plural sense depending on the language "one or more" is used in conjunction with. That is, "one or more" can be understood as "one or more than one", depending on the context. Similarly, terms such as "another" can be understood as "at least a second" or "more than one", depending on context. As used herein, the term "exemplary" is used in the sense of serving as an example, instance, or illustration. That is, the term "exemplary" is not used in the sense of "ideal" or "excellent" or "superior".

[0096] It should be readily understood that "on", "above", and "on top", in the present application, should be interpreted in the broadest manner, such that "on" means not only "directly on", but also includes the meaning of "on" with intervening features or layers therebetween, and "above" or "on top" includes not only the meaning of "above" or "on top", but also the meaning of "above" or "on top" without intervening features or layers therebetween (i.e., directly on).

[0097] In addition, spatially relative terms, such as "under", "below", "lower", "over", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90° or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0098] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An explosion-proof valve, characterized in that, Applied to a battery pack, the battery pack housing having a vent; the explosion-proof valve (100) includes: The explosion-proof valve body (110) has a guide (111); When the battery pack experiences thermal runaway, the guide (111) is used to allow the explosion-proof valve body (110) to move along the edge of the vent on the housing, so that the explosion-proof valve body (110) detaches from the housing.

2. The explosion-proof valve according to claim 1, characterized in that, The explosion-proof valve body (110) has a buckle (112), and the explosion-proof valve body (110) is detachably connected to the battery pack through the buckle (112); The guide part (111) is disposed on the buckle (112).

3. The explosion-proof valve according to claim 2, characterized in that, The buckle (112) has a first surface, which forms the guide portion (111). The first surface includes at least one of a flat surface and a curved surface.

4. The explosion-proof valve according to claim 3, characterized in that, The first surface is a flat surface; along the axial direction of the explosion-proof valve body (110), the first surface is inclined relative to the axis of the explosion-proof valve body (110).

5. The explosion-proof valve according to claim 4, characterized in that, The extension direction of the first surface and the axial extension direction of the explosion-proof valve body (110) form an angle; The included angle is greater than or equal to 45° and the included angle is less than or equal to 90°.

6. The explosion-proof valve according to claim 2, characterized in that, The number of the latches (112) is at least two, and at least two of the latches (112) are spaced apart on the explosion-proof valve body (110) along the circumference of the explosion-proof valve body (110).

7. The explosion-proof valve according to any one of claims 1-6, characterized in that, It also includes a sealing element (120), which is sleeved on the explosion-proof valve body (110); When the explosion-proof valve body (110) and the housing are connected, the sealing element (120) is sealed between the explosion-proof valve body (110) and the housing.

8. The explosion-proof valve according to any one of claims 1-6, characterized in that, It also includes a reinforcing member (130), which is disposed on the explosion-proof valve body (110).

9. The explosion-proof valve according to claim 8, characterized in that, There are multiple reinforcing members (130), and multiple reinforcing members (130) are spaced apart on the explosion-proof valve body (110) along the circumference of the explosion-proof valve body (110).

10. The explosion-proof valve according to claim 7, characterized in that, Along the axial direction of the explosion-proof valve body (110), the seal (120) and the guide (111) are spaced apart.

11. The explosion-proof valve according to claim 10, characterized in that, Along the axial direction of the explosion-proof valve body (110), there is a gap between the opposing surfaces of the guide (111) and the seal (120), the gap being 2mm-4mm.

12. The explosion-proof valve according to any one of claims 1-6, characterized in that, It also includes a balancing valve (140); the explosion-proof valve body (110) has a communicating cavity (113); the balancing valve (140) is disposed on the explosion-proof valve body (110); When the explosion-proof valve body (110) is connected to the housing, the balance valve (140) is located on the side of the explosion-proof valve body (110) away from the housing, and the balance valve (140) is used to control the connection between the communication cavity (113) and the external air.

13. The explosion-proof valve according to claim 12, characterized in that, The explosion-proof valve body (110) has a connection hole (114), which is located on the explosion-proof valve body (110); The connecting hole (114) and the communicating cavity (113) are connected, and at least part of the balancing valve (140) is disposed in the connecting hole (114).

14. A battery pack, characterized in that, include: The housing has an exhaust port; The explosion-proof valve (100) according to any one of claims 1-13, wherein the explosion-proof valve body (110) of the explosion-proof valve (100) is detachably disposed in the housing to open or close the exhaust port.

15. An electrical appliance, characterized in that, include: The battery pack of claim 14.

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