Battery pack explosion-proof valve, battery pack and electric equipment

Abstract

The invention relates to a battery pack anti-explosion valve, a battery pack and electric equipment, and the battery pack anti-explosion valve comprises a valve main body which forms a cavity and is provided with a first locking piece; the isolating membrane is connected to the valve main body and is used for sealing the cavity; the ejector pin assembly is arranged in the cavity in a sliding mode in the first direction, the ejector pin assembly comprises an ejector pin and a connecting base which are connected, a second locking piece is arranged on the connecting base, and the second locking piece is used for being matched with the first locking piece in a locking mode so that the ejector pin can be kept at the position where the isolating membrane can be punctured. According to the battery pack anti-explosion valve provided by the invention, gas in the battery pack can be completely discharged, and rapid pressure relief of the battery pack is facilitated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery explosion-proof valves, and in particular to a battery pack explosion-proof valve, a battery pack and electrical equipment. Background Art

[0002] In the related art, when the battery explosion-proof valve is opened, as the air pressure in the battery pack decreases, the exhaust gap will decrease, or even close prematurely, resulting in the inability to completely discharge the gas in the battery pack. Summary of the invention

[0003] The purpose of the present disclosure is to provide a battery pack explosion-proof valve, which can discharge all the gas in the battery pack and is conducive to rapid pressure relief of the battery pack.

[0004] In order to achieve the above-mentioned purpose, according to a first aspect of an embodiment of the present disclosure, there is provided a battery pack explosion-proof valve, the battery pack explosion-proof valve comprising: a valve body, the valve body forming a cavity and provided with a first locking piece; an isolation membrane, the isolation membrane being connected to the valve body and used to close the cavity; and a ejector pin assembly, the ejector pin assembly being slidably arranged in the cavity along a first direction, the ejector pin assembly comprising a connected ejector pin and a connecting seat, the connecting seat being provided with a second locking piece, the second locking piece being used to lock and cooperate with the first locking piece so that the ejector pin remains in a position to puncture the isolation membrane.

[0005] Optionally, the battery pack explosion-proof valve also includes an actuator, one of the valve body and the connecting seat is provided with a locking groove, and the other is provided with a mounting groove, one of the first locking member and the second locking member is used as the locking groove, and the other of the first locking member and the second locking member is connected to the mounting groove through the actuator, and the actuator is used to cause one of the first locking member and the second locking member connected to the mounting groove to extend out of the mounting groove to lock and cooperate with the locking groove.

[0006] Optionally, the valve body is provided with the locking groove, and the connecting seat is provided with the mounting groove, the locking groove is recessed from the cavity wall of the cavity along the second direction away from the connecting seat, and the mounting groove is recessed from the surface of the connecting seat along the second direction away from the valve body, and the actuator is constructed as a first spring, one end of the first spring is connected to the groove wall of the mounting groove, and the other end is connected to the second locking member.

[0007] Optionally, the cavity has a first opening and a second opening that are oppositely arranged in the first direction, and the isolation membrane is arranged at the first opening and is used to close the first opening.

[0008] Optionally, the ejector pin assembly has a first position, in which the second locking member is retracted into the mounting groove, the connecting seat is in sealing contact with the cavity wall of the valve body to seal the second opening, and there is a gap between the ejector pin and the isolation membrane.

[0009] Optionally, the ejector pin assembly has a second position, in which the actuator causes the second locking member to extend from the mounting groove to lock and cooperate with the first locking member, a gap is formed between the connecting seat and the cavity wall of the valve body, and the ejector pin pierces the isolation membrane.

[0010] Optionally, the cavity includes a connected small diameter portion and a large diameter portion, the second opening is formed in the small diameter portion, the small diameter portion is constructed as a constant diameter hole, the aperture of the large diameter portion gradually expands from the small diameter portion toward the first opening, in the first position, the connecting seat is in sealing contact with the cavity wall of the small diameter portion, and in the second position, the gap is formed between the connecting seat and the large diameter portion.

[0011] Optionally, the ejector pin includes a body and a spike portion, the body is connected to the connecting seat, the spike portion is connected to one end of the body facing away from the connecting seat, and a step surface is formed between the spike portion and the body, the valve body includes a mounting seat, the mounting seat is arranged in the cavity and is formed with a mounting through hole and a stop flange, the stop flange is arranged on a side of the mounting through hole facing the connecting seat and extends radially inward along the mounting through hole, the ejector pin is penetrated through the mounting through hole and the step surface is used to abut against the stop flange.

[0012] Optionally, the battery pack explosion-proof valve further includes an elastic member, which is sleeved on the main body and has one end abutting against the connecting seat and the other end abutting against the stop flange.

[0013] Optionally, the elastic member is configured as a second spring.

[0014] Optionally, the connection seat is provided with a plug-in hole, and the main body is plugged into the plug-in hole and fixedly connected to the plug-in hole.

[0015] Optionally, the ejector pin is provided with a gas gathering hole, and the gas gathering hole extends from an end surface of the body away from the spike portion toward the spike portion.

[0016] According to a second aspect of an embodiment of the present disclosure, there is provided a battery pack, comprising a pack body and the above-mentioned battery pack explosion-proof valve, wherein the battery pack explosion-proof valve is installed on the pack body and comprises a cavity and an isolation membrane, wherein the isolation membrane is arranged in the cavity to isolate the internal space of the pack body from the external environment.

[0017] According to a third aspect of an embodiment of the present disclosure, there is provided an electrical device comprising the above-mentioned battery pack.

[0018] Through the above technical scheme, in the battery pack explosion-proof valve provided by the present invention, a valve body, an isolation membrane and a ejector pin assembly are provided, a first locking piece is provided on the valve body, the ejector pin assembly includes an ejector pin and a connecting seat, a second locking piece is provided on the connecting seat, and the second locking piece is used to lock and cooperate with the first locking piece. Through such a configuration, when the valve is opened, the connecting seat can be locked to the valve body through the locking cooperation of the second locking piece and the first locking piece, and then the ejector pin assembly is locked to the valve body, so that the ejector pin is kept in the position of piercing the isolation membrane, that is, the battery pack explosion-proof valve is kept in the valve-open state, thereby ensuring that the gas in the battery pack can be completely discharged. In addition, through the locking cooperation of the second locking piece and the first locking piece, the battery pack explosion-proof valve can maintain a stable exhaust volume, which is conducive to rapid pressure relief.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic diagram of a closed valve state of a battery pack explosion-proof valve provided by an exemplary embodiment of the present disclosure; Figure 2 is a schematic diagram of an open valve state of a battery pack explosion-proof valve provided by an exemplary embodiment of the present disclosure; Figure 3 is a schematic diagram of a state in which a connection seat of a battery pack explosion-proof valve provided by an exemplary embodiment of the present disclosure abuts and seals with a valve body; Figure 4 It is a schematic diagram of the installation of a mounting seat and an ejector pin of a battery pack explosion-proof valve provided by an exemplary embodiment of the present disclosure.

[0021] Description of Reference Numerals 1-battery pack explosion-proof valve; 11-valve body; 110-first opening; 111-cavity; 1110-small diameter portion; 112-mounting seat; 1120-large diameter portion; 12-thimble assembly; 120-second opening; 121-thimble; 1211-gas gathering hole; 122-connecting seat; 1221-mounting groove; 1222-plug-in hole; 123-body; 124-spike portion; 125-stop flange; 126-step surface; 127-mounting through hole; 13-isolating membrane; 14-second locking piece; 15-first locking piece; 16-actuating piece; 17-elastic piece. DETAILED DESCRIPTION

[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0023] In the present disclosure, unless otherwise stated, directional words such as "first direction, second direction" refer to the attached Figure 1 In addition, "inside" and "outside" refer to the "inside" and "outside" relative to the corresponding component's own contour. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another element and have no order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0024] According to the specific implementation of the present disclosure, Figures 1 to 4 As shown in the figure, a battery pack explosion-proof valve is provided, and the battery pack explosion-proof valve 1 includes: a valve body 11, the valve body 11 is formed with a cavity 111 and is provided with a first locking piece 15; an isolation membrane 13, the isolation membrane 13 is connected to the valve body 11 and is used to close the cavity 111; the ejector assembly 12, the ejector assembly 12 is slidably arranged in the cavity 111 along a first direction, the ejector assembly 12 includes a connected ejector 121 and a connecting seat 122, and the connecting seat 122 is provided with a second locking piece 14, and the second locking piece 14 is used to lock and cooperate with the first locking piece 15, so that the ejector 121 is maintained at a position to puncture the isolation membrane 13.

[0025] Through the above technical scheme, in the battery pack explosion-proof valve provided by the present invention, a valve body 11, an isolation membrane 13 and a ejector assembly 12 are provided, a first locking piece 15 is provided on the valve body 11, the ejector assembly 12 includes an ejector 121 and a connecting seat 122, a second locking piece 14 is provided on the connecting seat 122, and the second locking piece 14 is used to lock and cooperate with the first locking piece 15. Through such a configuration, when the valve is opened, the connecting seat 122 can be locked to the valve body 11 through the locking cooperation of the second locking piece 14 and the first locking piece 15, and then the ejector assembly 12 is locked to the valve body 11, so that the ejector 121 is kept in the position of piercing the isolation membrane 13, that is, the battery pack explosion-proof valve is kept in the valve-open state, thereby ensuring that the gas in the battery pack can be completely discharged, and in addition, through the locking cooperation of the second locking piece 14 and the first locking piece 15, the battery pack explosion-proof valve can maintain a stable exhaust volume, which is conducive to rapid pressure relief.

[0026] In the battery pack explosion-proof valve provided by the present disclosure, when the valve is not opened, that is, in the valve-closed state, there is a sufficient distance between the isolation membrane 13 and the ejector pin 121, so that the phenomenon of erroneous valve opening caused by the short distance between the ejector pin 121 and the isolation membrane 13 and the collapse of the isolation membrane 13 itself can be avoided. When the air pressure in the battery pack gradually increases, the increased air pressure will push the ejector pin assembly 12 to move so that the ejector pin 121 pierces the isolation membrane 13 to open the valve. After the isolation membrane 13 is pierced, the gas in the battery pack can be quickly discharged from the cavity 111 to achieve the purpose of rapid pressure relief. In the present disclosure, the distance between the ejector pin 121 and the isolation membrane 13 can be set according to the use requirements to ensure that there is a large moving distance between the ejector pin 121 and the isolation membrane 13, so as to avoid the problem of erroneous valve opening caused by accidentally piercing the isolation membrane 13.

[0027] In the exemplary embodiments provided in the present disclosure, reference is made to Figures 1 to 3 As shown in , the battery pack explosion-proof valve 1 also includes an actuator 16, one of the valve body 11 and the connecting seat 122 is provided with a locking groove, and the other is provided with a mounting groove 1221, one of the first locking member 15 and the second locking member 14 is used as a locking groove, and the other of the first locking member 15 and the second locking member 14 is connected to the mounting groove 1221 through the actuator 16, and the actuator 16 is used to cause the one of the first locking member 15 and the second locking member 14 connected to the mounting groove 1221 to extend out of the mounting groove 1221 to lock and cooperate with the locking groove. In the above technical solution, one of the first locking member 15 and the second locking member 14 is located in the mounting groove 1221, and when the actuator 16 is actuated, the one of the first locking member 15 and the second locking member 14 located in the mounting groove 1221 is extended from the mounting groove 1221 to lock and cooperate with the first locking member 15, so as to ensure that the first locking member 15 and the second locking member 14 can be locked and cooperated in time.

[0028] In the exemplary embodiments provided in the present disclosure, reference is made to Figures 1 to 3 As shown in , the valve body 11 is provided with a locking groove, the connecting seat 122 is provided with a mounting groove 1221, the locking groove is recessed from the cavity wall of the cavity 111 along the second direction away from the connecting seat 122, the mounting groove 1221 is recessed from the surface of the connecting seat 122 along the second direction away from the valve body 11, and the actuator 16 is constructed as a first spring, one end of the first spring is connected to the groove wall of the mounting groove 1221, and the other end is connected to the second locking member 14. In the above technical solution, the first spring is elastic, and when the mounting groove 1221 is opposite to the locking groove, the second locking member 14 is extended from the mounting groove 1221 by the elastic force of the first spring and inserted into the locking groove to lock with the locking groove, so as to achieve automatic locking of the second locking member 14 and the first locking member 15.

[0029] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 2 As shown in , the cavity 111 may have a first opening 110 and a second opening 120 arranged opposite to each other in a first direction, and the isolation film 13 is arranged at the first opening 110 and used to close the first opening 110. Here, the isolation film 13 is used to prevent dust, water stains, etc. from entering the cavity 111, and the second opening 120 is used to communicate with the internal space of the battery pack.

[0030] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 As shown in FIG. , the ejector assembly 12 has a first position. In the first position, the second locking member 14 is retracted into the mounting groove 1221, the connecting seat 122 is in sealing contact with the cavity wall of the valve body 11 to seal the second opening 120, and there is a gap between the ejector 121 and the isolation membrane 13. In the first position, the valve is in a closed state (please refer to FIG. Figure 1 ), that is, the connecting seat 122 is in sealing contact with the cavity wall of the valve body 11 to seal the second opening 120, to ensure that when the battery pack explosion-proof valve is not opened, an enclosed space is formed between the end of the connecting seat 122 close to the second opening 120 and the valve body 11. In this way, when the internal air pressure of the battery pack reaches the detonation pressure of the battery pack explosion-proof valve, the gas pressure increases rapidly to quickly push the connecting seat 122 to move, and the movement of the connecting seat 122 drives the ejector pin 121 to pierce the isolation membrane 13, which is conducive to timely triggering the valve opening action and improving the valve opening efficiency of the battery pack explosion-proof valve.

[0031] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 2 As shown in FIG. 1 , the ejector assembly 12 has a second position. In the second position, the actuator 16 causes the second locking member 14 to extend from the mounting groove 1221 to lock with the first locking member 15, a gap is formed between the connecting seat 122 and the cavity wall of the valve body 11, and the ejector 121 pierces the isolation membrane 13. In the second position, that is, when the valve is opened (see Figure 2 ), since a gap is formed between the connecting seat 122 and the cavity wall of the valve body 11, the gas can reach the first opening 110 through the gap and be discharged through the first opening 110. Here, since in the second position, the actuator 16 causes the second locking member 14 to extend from the mounting groove 1221 to lock and cooperate with the first locking member 15, therefore, in the second position, the ejector pin assembly 12 is locked to the valve body 11 and a gap is always maintained between the connecting seat 122 and the cavity wall of the valve body 11, the gas can be continuously discharged, ensuring that the gas in the battery pack is completely discharged, and facilitating rapid pressure relief of the battery pack.

[0032] It should be noted that, when the valve is not opened, that is, when the valve is closed, the connection seat 122 is in sealed contact with the cavity wall of the valve body 11 to form a closed space, and the closed space is connected to the inside of the battery pack, therefore, the isolation membrane 13 can be a waterproof and breathable membrane, which has good waterproof and breathable properties, and can prevent liquid from entering the cavity, and can also achieve the discharge of gas in the cavity 111. In this way, when the valve is opened, part of the gas can be directly discharged to the outside through the waterproof and breathable membrane, which improves the exhaust efficiency, wherein the isolation membrane 13 can be connected to the valve body 11 by any suitable installation method, such as welding, etc., and the present disclosure does not make specific restrictions on this.

[0033] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 2 As shown in the figure, the cavity 111 may include a connected small diameter portion 1110 and a large diameter portion 1120, the second opening 120 is formed in the small diameter portion 1110, the small diameter portion 1110 is constructed as an equal diameter hole, the aperture of the large diameter portion 1120 gradually expands from the small diameter portion 1110 toward the first opening 110, in the first position, the connecting seat 122 is in sealing contact with the cavity wall of the small diameter portion 1110, and in the second position, a gap is formed between the connecting seat 122 and the large diameter portion 1120. By such arrangement, the connecting seat 122 is in sealed contact with the small diameter portion 1110 to form an enclosed space. When the internal air pressure of the battery pack reaches the detonation pressure of the battery pack explosion-proof valve, the pressure of the gas pushes the connecting seat 122 to drive the ejector pin 121 to move toward the first opening 110. Since the aperture of the large diameter portion 1120 gradually expands from the small diameter portion 1110 toward the first opening 110, as the connecting seat 122 moves, the gap gradually increases, and the exhaust volume increases, which is conducive to rapid exhaust and pressure relief, and improves the pressure relief efficiency. In addition, as the connecting seat 122 moves, the friction between the connecting seat 122 and the cavity 111 decreases, which is conducive to the gas pushing the connecting seat 122 smoothly, thereby further improving the exhaust and pressure relief efficiency.

[0034] In the present disclosure, the small-diameter portion 1110 is configured as a hole of equal diameter, which is beneficial for connecting the small-diameter portion 1110 with the battery pack.

[0035] In another exemplary embodiment provided by the present disclosure, the first locking member 15 and the second locking member 14 can be constructed as magnets with opposite magnetic properties, the first locking member 15 is installed on the cavity wall of the cavity 111, the mounting groove 1221 is recessed from the surface of the connecting seat 122 along the second direction away from the valve body 11, the actuator 16 is constructed as a first spring, one end of the first spring is connected to the groove wall of the mounting groove 1221, and the other end is connected to the second locking member 14, when the connecting seat 122 moves toward the second position, the second locking member 14 is extended from the mounting groove 1221 by the elastic force of the first spring and contacts the hole wall of the large diameter part 1120, and when reaching the first locking member 15, the second locking member 14 and the first locking member 15 are attracted by opposite sexes to lock the connecting seat 122 to the valve body 11. Of course, the first locking member 15 and the second locking member 14 can also be set to other structures that can achieve locking cooperation, and the present disclosure does not specifically limit this.

[0036] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 3 and Figure 4 As shown in the figure, the ejector pin 121 includes a main body 123 and a spike portion 124, the main body 123 is connected to the connecting seat 122, the spike portion 124 is connected to one end of the main body 123 away from the connecting seat 122, and a step surface 126 is formed between the spike portion 124 and the main body 123, the valve body 11 includes a mounting seat 112, the mounting seat 112 is arranged in the cavity 111 and is formed with a mounting through hole 127 and a stop flange 125, the stop flange 125 is arranged on a side of the mounting through hole 127 facing the connecting seat 122 and extends radially inwardly along the mounting through hole 127, the ejector pin 121 is penetrated through the mounting through hole 127 and the step surface 126 is used to abut against the stop flange 125. By providing a step surface 126 and a stop flange 125, and making the step surface 126 and the stop flange 125 abut against each other, the spike portion 124 is limited to the connecting seat 122, ensuring that the ejector pin 121 is in a relatively stable state when the valve is not opened, wherein the mounting through hole 127 plays a guiding role, thereby improving the stability of the ejector pin 121 during movement, and ensuring that the ejector pin 121 can smoothly pierce the isolation membrane 13 when the valve is opened.

[0037] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 2As shown in , the battery pack explosion-proof valve 1 also includes an elastic member 17, which is sleeved on the body 123 and has one end of the elastic member 17 abutting against the connecting seat 122 and the other end abutting against the stop flange 125. By providing the elastic member 17, when the ejector pin 121 moves toward the isolation membrane 13 (that is, when the ejector pin 121 moves to the second position), it is subjected to the damping force applied by the elastic member 17, thereby improving the stability of the ejector pin 121 during movement. In addition, by providing the elastic member 17, a sufficient spacing is reserved between the ejector pin 121 and the isolation membrane 13, thereby avoiding the problem of accidental opening of the valve due to the ejector pin 121 accidentally piercing the isolation membrane 13.

[0038] In the exemplary embodiments provided in the present disclosure, reference is made to Figures 1 to 3 As shown in , the elastic member 17 is constructed as a second spring. Of course, the elastic member 17 can also be constructed as other structures with higher elasticity, such as an elastic rubber sleeve, etc., and the present disclosure does not make any specific restrictions on this.

[0039] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 3 As shown in , the connection base 122 may be provided with a plug hole 1222, and the body 123 is plugged into the plug hole 1222 and fixedly connected to the plug hole 1222. This arrangement facilitates processing and facilitates the assembly of the battery pack explosion-proof valve 1. In addition, the reliability of the connection between the body 123 and the connection base 122 is ensured.

[0040] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 2 As shown in the figure, the ejector pin 121 is provided with a gas gathering hole 1211, and the gas gathering hole 1211 extends from the end surface of the body 123 away from the spike portion 124 toward the spike portion 124. By providing the gas gathering hole 1211, when the valve is opened, the gas in the battery pack can enter the gas gathering hole 1211, and a large amount of gas gathers in the gas gathering hole 1211 and pushes the ejector pin 121 to drive the connecting seat 122 to move together, so as to better drive the ejector pin assembly 12 to move.

[0041] In a second aspect of the present disclosure, a battery pack is provided, including a pack body and the above-mentioned battery pack explosion-proof valve 1, the battery pack explosion-proof valve 1 is installed in the pack body and includes a cavity 111 and an isolation membrane 13, the isolation membrane 13 is arranged in the cavity 111, and is used to isolate the internal space of the pack body from the external environment. The battery pack also has all the advantages of the above-mentioned battery pack explosion-proof valve 1, which will not be repeated here.

[0042] The third aspect of the present disclosure further provides an electric device, including the above-mentioned battery pack, wherein the electric device may be a vehicle, an energy storage cabinet, an aircraft, etc., and the present disclosure does not impose any specific restrictions on this.

[0043] refer to Figures 1 to 4As shown in , the use process of the battery pack explosion-proof valve provided by the present invention will be described in detail below.

[0044] When the valve is not opened, the ejector assembly 12 is located at the first position (i.e. Figure 1 ), at this time, the connecting seat 122 is in sealing contact with the cavity wall of the valve body 11 to seal the second opening 120, and at the same time, the second locking member 14 is retracted into the mounting groove 1221, and there is a gap between the ejector pin 121 and the isolation membrane 13. When the internal air pressure of the battery pack reaches the detonation pressure of the battery pack explosion-proof valve, that is, when the enclosed space and the gas gathering hole 1211 are filled with gas, the valve opening action is started. In other words, the connecting seat 122 moves to the second position under the action of the gas pressure. When the connecting seat 122 moves to the second position (that is, Figure 2 ), the actuator 16 causes the second locking member 14 to extend from the mounting groove 1221 to lock with the first locking member 15, thereby locking the connecting seat 122 to the valve body 11. At this time, the ejector pin 121 has pierced the isolation membrane 13, and a gap is formed between the connecting seat 122 and the cavity wall of the valve body 11, so that the gas flowing out from the battery pack continues to pass through the gap to reach the first opening 110, and is discharged from the first opening 110 to the outside, thereby realizing rapid pressure relief of the battery pack.

[0045] 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 in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0046] It should also 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, the present disclosure will not further describe various possible combinations.

[0047] In addition, 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 explosion-proof valve, characterized in that: The battery pack explosion-proof valve comprises: a valve body, the valve body forming a cavity and provided with a first locking member; an isolation diaphragm connected to the valve body and used to close the cavity; A ejector pin assembly is slidably arranged in the cavity along a first direction, and the ejector pin assembly includes a connected ejector pin and a connecting seat, and a second locking piece is provided on the connecting seat, and the second locking piece is used to lock and cooperate with the first locking piece so that the ejector pin is maintained at a position to puncture the isolation membrane.

2. The battery pack explosion-proof valve according to claim 1, characterized in that: The battery pack explosion-proof valve also includes an actuator, one of the valve body and the connecting seat is provided with a locking groove, and the other is provided with a mounting groove, one of the first locking member and the second locking member is used as the locking groove, and the other of the first locking member and the second locking member is connected to the mounting groove through the actuator, and the actuator is used to cause one of the first locking member and the second locking member connected to the mounting groove to extend out of the mounting groove to lock and cooperate with the locking groove.

3. The battery pack explosion-proof valve according to claim 2, characterized in that: The valve body is provided with the locking groove, and the connecting seat is provided with the mounting groove. The locking groove is recessed from the cavity wall of the cavity along the second direction away from the connecting seat, and the mounting groove is recessed from the surface of the connecting seat along the second direction away from the valve body. The actuator is constructed as a first spring, one end of the first spring is connected to the groove wall of the mounting groove, and the other end is connected to the second locking member.

4. The battery pack explosion-proof valve according to any one of claims 1 to 3, characterized in that: The cavity has a first opening and a second opening that are oppositely arranged in the first direction, and the isolation film is arranged at the first opening and is used to close the first opening.

5. The battery pack explosion-proof valve according to claim 4, characterized in that: The ejector pin assembly has a first position. In the first position, the second locking member is retracted into the mounting groove, the connecting seat is in sealing contact with the cavity wall of the valve body to seal the second opening, and a gap is formed between the ejector pin and the isolation membrane.

6. The explosion-proof valve of the battery pack according to claim 5, characterized in that: The ejector assembly has a second position. In the second position, the actuator causes the second locking member to extend from the mounting groove to lock and cooperate with the first locking member, a gap is formed between the connecting seat and the cavity wall of the valve body, and the ejector pierces the isolation membrane.

7. The explosion-proof valve of the battery pack according to claim 6, characterized in that: The cavity includes a small diameter portion and a large diameter portion connected to each other, the second opening is formed in the small diameter portion, the small diameter portion is configured as a hole of equal diameter, and the aperture of the large diameter portion gradually increases from the small diameter portion toward the first opening. In the first position, the connection seat is in sealing contact with the cavity wall of the small-diameter portion, and in the second position, the gap is formed between the connection seat and the large-diameter portion.

8. The explosion-proof valve of the battery pack according to claim 1, characterized in that: The ejector pin comprises a body and a spike portion, wherein the body is connected to the connection seat, the spike portion is connected to an end of the body away from the connection seat, and a step surface is formed between the spike portion and the body. The valve body comprises a mounting seat, which is arranged in the cavity and is formed with a mounting through hole and a stop flange, wherein the stop flange is arranged on a side of the mounting through hole facing the connecting seat and extends radially inwardly along the mounting through hole. The ejector pin is inserted into the mounting through hole and the step surface is used to abut against the stop flange.

9. The battery pack explosion-proof valve according to claim 8, characterized in that: The battery pack explosion-proof valve also includes an elastic member, which is sleeved on the body and has one end abutting against the connecting seat and the other end abutting against the stop flange.

10. The battery pack explosion-proof valve according to claim 9, characterized in that: The elastic member is configured as a second spring.

11. The explosion-proof valve of the battery pack according to claim 8, characterized in that: The connection seat is provided with a plug-in hole, and the body is plugged into the plug-in hole and fixedly connected with the plug-in hole.

12. The battery pack explosion-proof valve according to claim 8, characterized in that: The ejector pin is provided with a gas gathering hole, and the gas gathering hole extends from the end surface of the body away from the spike portion toward the spike portion.

13. A battery pack, comprising a pack body, characterized in that: It also includes a battery pack explosion-proof valve according to any one of claims 1 to 12, wherein the battery pack explosion-proof valve is installed on the package body and includes a cavity and an isolation membrane, and the isolation membrane is arranged in the cavity to isolate the internal space of the package body from the external environment.

14. An electrical device, characterized in that: Comprising the battery pack according to claim 13.

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