Pressure release mechanism, battery and electric device

Abstract

The utility model discloses a pressure release mechanism, a battery and a power utilization device, the battery comprises a box body, a battery monomer and the pressure release mechanism, the box body is provided with a containing cavity, the battery monomer is located in the containing cavity, and the pressure release mechanism is arranged on at least one wall surface of the box body; the pressure releasing mechanism comprises a valve body, a first pressure releasing part and a second pressure releasing part, the valve body comprises an isolation part, a first containing part and a second containing part, the isolation part is located between the first containing part and the second containing part in the first direction, and the isolation part is provided with a first through hole communicating with the first containing part and the second containing part; the valve element comprises a piston and a guide piece, the guide piece is movably arranged in the first through hole, and the piston is connected with one end of the guide piece and can be in sealing fit with the first containing part; wherein the second containing part covers the outer side of the guide piece, and the first containing part, the second containing part and the isolation part are of an integrally-formed structure.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, and in particular to a pressure release mechanism, a battery and an electric device. BACKGROUND

[0002] Secondary batteries, especially lithium ion batteries, have the advantages of high voltage, large specific energy, long cycle life, green and pollution-free, wide working temperature range and small self-discharge, and are widely used in portable electronic devices and large new energy electric vehicles. It has great significance to solve the environmental pollution and energy crisis of human beings. With the wide application of lithium ion batteries, battery reliability has become a problem that users are closely concerned about. SUMMARY

[0003] In one aspect of the present disclosure, a battery is provided, comprising: a box body, a battery monomer and a pressure release mechanism, wherein the box body has a containing cavity, the battery monomer is located in the containing cavity, and the pressure release mechanism is arranged on at least one wall surface of the box body; the pressure release mechanism comprises:

[0004] a valve body comprising an isolation part, a first containing part and a second containing part, the isolation part is located between the first containing part and the second containing part along a first direction, and the isolation part has a first through hole communicating the first containing part and the second containing part; and

[0005] a valve core comprising a piston and a guide, the guide is movably arranged in the first through hole, the piston is connected with one end of the guide and can be sealingly matched with the first containing part; wherein the second containing part is covered outside the guide, and the first containing part, the second containing part and the isolation part are an integral molding structure.

[0006] In the present embodiment, the pressure release mechanism is arranged on the wall surface of the battery box body to release the internal pressure of the battery box body, so as to prevent the battery from exploding and other phenomena caused by overvoltage or overheating under charging, discharging or abnormal working conditions. The valve core of the pressure release mechanism cooperates with the valve body, so that the piston is sealingly matched with the first containing part of the valve body, the guide of the valve core is connected with the piston to guide the movement of the piston, and the second containing part is covered outside the guide to protect the guide. By making the first containing part, the second containing part and the isolation part an integral molding structure, not only the number of parts in the pressure release mechanism can be reduced, but also the second containing part is not easy to be separated from the first containing part and the isolation part, thereby reducing the failure risk of the pressure release mechanism, and improving the reliability of the pressure release mechanism and the battery applying the pressure release mechanism.

[0007] In some embodiments, the piston and the guide are an integral molding structure.

[0008] In the embodiment, by making the piston and the guide into an integrated structure, the number of parts in the pressure release mechanism can be reduced, and the guide is less likely to be separated from the piston, thereby reducing the risk of failure of the pressure release mechanism, and improving the reliability of the pressure release mechanism and the battery applying the pressure release mechanism.

[0009] In some embodiments, the pressure release mechanism further comprises an elastic member connected between the valve body and the valve core and located in the second accommodating portion, for keeping the piston in sealing cooperation with the first accommodating portion by the elastic force acting on the valve core.

[0010] In the embodiment, the second accommodating portion integrally formed with the isolation portion and the first accommodating portion protects the elastic member, so that the influence of dust and other impurities outside the pressure release mechanism on the elastic member can be reduced, and the operation reliability of the pressure release mechanism is improved.

[0011] In some embodiments, the elastic member comprises a spring, the spring is sleeved on the protruding part of the guide relative to the first through hole; the valve core further comprises:

[0012] a bottom plug, which is detachably arranged at the end of the guide away from the piston and located in the second accommodating portion;

[0013] wherein one end of the spring abuts against the isolation portion, and the other end abuts against the bottom plug.

[0014] In the embodiment, the spring is sleeved on the protruding part of the guide relative to the first through hole, and the two ends thereof abut against the isolation portion and the bottom plug respectively, so that the elastic force consistent with and uniform to the guiding direction realized by the guide can be formed. The detachable connection between the bottom plug and the end of the guide facilitates the maintenance and replacement of the spring.

[0015] In some embodiments, the end of the guide away from the piston is provided with a clamping groove, the end of the guide away from the piston passes through the bottom plug, and the bottom plug is fixed by embedding a clamping ring into the clamping groove.

[0016] In the embodiment, the clamping groove of the guide at the end of the bottom plug away from the piston is fixed by the clamping ring, so that the spring is stably abutted against by the bottom plug, and the bottom plug is more convenient to disassemble.

[0017] In some embodiments, the second accommodating portion comprises a sleeve segment connected with the isolation portion, and the valve body further comprises:

[0018] a protective cover, which is detachably arranged at the end of the sleeve segment away from the isolation portion.

[0019] In the embodiment, the hollow part of the sleeve segment realizes the protection of the elastic member, the guide member and the like, and the detachable connection of the protective cover relative to the sleeve segment of the second accommodating part simplifies the assembly.

[0020] In some embodiments, the valve core further comprises:

[0021] The ferromagnetic member abuts against the piston and has a fixing hole;

[0022] The piston has an injection molding riveting structure passing through the fixing hole.

[0023] In the embodiment, the piston and the ferromagnetic member are integrally formed by injection molding or the like through the fixing hole on the ferromagnetic member, so that the number of parts in the pressure release mechanism is reduced, the assembly process between the piston and the ferromagnetic member and other structures of the pressure release mechanism is saved, and the reliability of the pressure release mechanism is improved.

[0024] In some embodiments, the ferromagnetic member is in a plate shape and has a third through hole for the guide member to pass through, and the ferromagnetic member is located on the side of the piston adjacent to the isolation part along the first direction.

[0025] In the embodiment, the ferromagnetic member is provided in a plate shape, which can reduce the space occupation of the ferromagnetic member in the guide direction of the guide member. The ferromagnetic member is arranged on the side of the piston adjacent to the isolation part, so that it is not easy to fall off under the action of external force and is not easy to be corroded. The guide member passes through the third through hole on the ferromagnetic member, which is conducive to keeping the magnetic force consistent with the guide direction of the guide member, so that the piston is more smoothly opened under the action of the magnetic force.

[0026] In some embodiments, the valve body further comprises a first sealing member, the first sealing member and the first accommodating part are in an integral molding structure, and the piston is in sealing cooperation with the first accommodating part through the first sealing member in the first accommodating part.

[0027] In the embodiment, the first sealing member is in sealing cooperation with the first accommodating part through the first sealing member in the first accommodating part, and the first sealing member and the first accommodating part are in an integral molding structure, so that the number of parts in the pressure release mechanism is reduced, the assembly process between the first sealing member and the valve body is saved, and the reliability of the pressure release mechanism is improved.

[0028] In some embodiments, the first sealing member comprises a sealing ring, the sealing ring has at least two annular protrusions protruding along the first direction, and the at least two annular protrusions are arranged in a radial direction.

[0029] In the embodiment, the compression of the piston by the at least two annular protrusions of the sealing ring forms double or more sealing effects, so as to achieve better sealing effect.

[0030] In some embodiments, the isolation portion has a second mounting groove, and the valve body further comprises a second sealing member embedded in the second mounting groove and configured to form a compression seal between the valve body and the wall surface.

[0031] In the present embodiment, the second sealing member embedded in the second mounting groove of the isolation portion forms a compression seal with the wall surface of the tank body, which improves the air tightness of the joint between the wall surface of the tank body and the isolation portion and reduces the possibility of pressure leakage.

[0032] In some embodiments, the valve body further comprises a plurality of insert nuts embedded in the isolation portion.

[0033] In the present embodiment, the insert nuts are embedded in the isolation portion to form an integral structure with the isolation portion, which is more convenient and reliable during installation. Moreover, under the reliable connection of the insert nuts, the second sealing member can be compressed at the joint between the wall surface of the tank body and the isolation portion, further improving the sealing effect.

[0034] In some embodiments, the guide is a non-rotational body.

[0035] In the present embodiment, the guide in the form of a non-rotational body cooperates with the valve body to conveniently realize the anti-rotation function of the guide and the piston connected thereto, thereby effectively reducing the risk of affecting the failure of the pressure release mechanism due to the rotation of the piston.

[0036] In some embodiments, the guide comprises a cylindrical segment and a protruding rib provided on the outer wall of the cylindrical segment and extending in the first direction, and the first through hole comprises a cylindrical hole that is in sliding cooperation with the cylindrical segment, and the hole wall of the cylindrical hole has a groove that penetrates in the first direction and is in sliding cooperation with the protruding rib.

[0037] In the present embodiment, by slidingly cooperating the cylindrical hole of the first through hole with the cylindrical segment and the groove on the hole wall of the cylindrical hole that penetrates in the first direction with the protruding rib, on the one hand, the guide runs more smoothly relative to the first through hole, and on the other hand, it effectively prevents the guide from rotating relative to the first through hole, thereby reducing the risk of affecting the failure of the pressure release mechanism due to the rotation of the piston relative to the valve body.

[0038] In one aspect of the present disclosure, a pressure release mechanism is provided, comprising:

[0039] a valve body comprising an isolation portion, a first receiving portion, and a second receiving portion, the isolation portion being located between the first receiving portion and the second receiving portion in a first direction, the isolation portion having a first through hole communicating the first receiving portion and the second receiving portion; and

[0040] a valve core, comprising a piston and a guide, the guide being movably arranged in the first through hole, the piston being connected with one end of the guide and capable of sealingly cooperating with the first accommodating portion;

[0041] wherein the second accommodating portion covers the outside of the guide, and the first accommodating portion, the second accommodating portion and the isolation portion are integrally formed.

[0042] In the embodiment, the valve core of the pressure release mechanism cooperates with the valve body, so that the piston sealingly cooperates with the first accommodating portion of the valve body, the guide of the valve core is connected with the piston to realize the guidance of the piston movement, and the second accommodating portion covers the outside of the guide to realize the protection of the guide. By making the first accommodating portion, the second accommodating portion and the isolation portion be integrally formed, not only the number of parts in the pressure release mechanism can be reduced, but also the second accommodating portion is not easy to be separated from the first accommodating portion and the isolation portion, thereby reducing the failure risk of the pressure release mechanism, and improving the reliability of the pressure release mechanism and the battery applying the pressure release mechanism.

[0043] In one aspect of the present disclosure, a power consuming device is provided, comprising:

[0044] the battery as described above, or the pressure release mechanism as described above.

[0045] In the embodiment, the power consuming device applying the battery or the pressure release mechanism has better reliability. BRIEF DESCRIPTION OF DRAWINGS

[0046] The accompanying drawings, which form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0047] The present disclosure can be understood more readily by reference to the following detailed description, taken in connection with the accompanying drawings, and wherein:

[0048] Figure 1 is a structural schematic diagram of some embodiments of the power consuming device according to the present disclosure;

[0049] Figure 2 is a structural schematic diagram of some embodiments of the battery according to the present disclosure;

[0050] Figure 3 is an installation structural schematic diagram of some embodiments of the pressure release mechanism according to the present disclosure;

[0051] Figure 4 is an exploded schematic diagram of the installation structure of some embodiments of the pressure release mechanism according to the present disclosure;

[0052] Figure 5is a structural schematic view of the pressure relief mechanism according to some embodiments of the present disclosure in a perspective view along a first direction;

[0053] Figure 6 is a BB cross-sectional schematic view of the pressure relief mechanism according to some embodiments of the present disclosure; Figure 5

[0054] Figure 7 and Figure 8 is a structural schematic view of the valve body in different perspective views along a first direction according to some embodiments of the pressure relief mechanism of the present disclosure;

[0055] Figure 9 is a structural schematic view of the valve core in a perspective view along a first direction according to some embodiments of the pressure relief mechanism of the present disclosure;

[0056] Figure 10 is a BB cross-sectional schematic view of the pressure relief mechanism according to some embodiments of the present disclosure; Figure 9

[0057] and Figure 11 is a structural schematic view of the valve body in different perspective views along a first direction according to some embodiments of the pressure relief mechanism of the present disclosure; Figure 12

[0058] is a structural schematic view of the valve core in a perspective view along a first direction according to some embodiments of the pressure relief mechanism of the present disclosure; Figure 13

[0059] is a CC cross-sectional schematic view of the pressure relief mechanism according to some embodiments of the present disclosure. Figure 14 Figure 13 It should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Furthermore, like or similar reference numerals are used to indicate like or similar parts.

[0060] BRIEF DESCRIPTION OF THE DRAWINGS

[0061] BRIEF DESCRIPTION OF THE DRAWINGS

[0062] 10, battery; 11, case; 12, battery cell; 13, pressure relief mechanism;

[0063] 20, valve body; 21, isolation portion; 211, first through hole; 211a, cylindrical hole; 211b, groove; 22, first accommodating portion; 221, first mounting groove; 23, second accommodating portion; 231, sleeve segment; 232, protective cover; 24, first sealing member; 241, annular protrusion; 25, second mounting groove; 26, second sealing member; 27, insert nut;

[0064] 30, valve core; 31, piston; 311, injection riveting structure; 32, guide; 321, clamping groove; 322, cylindrical segment; 323, protruding rib; 33, bottom plug; 34, clamping ring; 35, ferromagnetic member; 351, fixing hole; 352, third through hole;​​

[0065] 40, elastic member; 41, spring;

[0066] 50, vehicle; 51, controller; 52, motor; 53, axle; 54, wheel;

[0067] dr1, first direction; dr2, second direction; dr3, third direction. DETAILED DESCRIPTION

[0068] The embodiments of the present disclosure will be described in further detail below with reference to the accompanying drawings and examples. The detailed description and drawings of the following examples are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure, i.e., the present disclosure is not limited to the described examples.

[0069] In the description of the present disclosure, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0070] The orientation words appearing in the following description are the directions shown in the drawings, and are not a limitation on the specific structure of the present disclosure. In the description of the present disclosure, it should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0071] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.

[0072] In some related technologies, the pressure release mechanism used by the battery pack has a valve body and a valve core assembly installed in the valve body, the valve core assembly includes a piston and a guide rod penetrating in the valve body, and a spring is arranged at the lower end of the guide rod and the valve body to realize sealing effect by the elastic force of the spring cooperating with the sealing ring. In order to protect the guide rod and the spring, a sheath connected with the valve body is arranged to realize protection from the outside of the guide rod and the spring.

[0073] It is found through research that in the prior art, the sheath and the valve body are two independent components, which may be separated during use, affecting the protection of the guide rod and the spring. In addition, since the guide rod is a rotary body, the piston connected with the guide rod may rotate relative to the valve body under the action of an external force, bringing the risk of failure of the pressure release mechanism, thereby affecting the reliability of the pressure release mechanism and the battery applying the pressure release mechanism.

[0074] Therefore, the embodiments of the present disclosure provide a pressure release mechanism, a battery and a power utilization device, which can improve the reliability.

[0075] In one aspect of the present disclosure, a battery is provided, comprising: a box body, a battery monomer and a pressure release mechanism, wherein the box body has a containing cavity, the battery monomer is located in the containing cavity, and the pressure release mechanism is arranged on at least one wall surface of the box body; the pressure release mechanism comprises:

[0076] a valve body, comprising an isolation part, a first containing part and a second containing part, the isolation part is located between the first containing part and the second containing part along a first direction, and the isolation part has a first through hole communicating the first containing part and the second containing part; and

[0077] a valve core, comprising a piston and a guide, the guide is movably arranged in the first through hole, the piston is connected with one end of the guide and can be sealingly matched with the first containing part; wherein the second containing part is covered outside the guide, and the first containing part, the second containing part and the isolation part are an integral molding structure.

[0078] In the present embodiment, the pressure release mechanism is arranged on the wall surface of the battery box body to release the internal pressure of the battery box body, so as to prevent the battery from exploding and other phenomena caused by overpressure or overheating under charging, discharging or abnormal working conditions. The valve core of the pressure release mechanism cooperates with the valve body, so that the piston is sealingly matched with the first containing part of the valve body, the guide of the valve core is connected with the piston to guide the movement of the piston, and the second containing part is covered outside the guide part to protect the guide part. By making the first containing part, the second containing part and the isolation part an integral molding structure, not only the number of parts in the pressure release mechanism can be reduced, but also the second containing part is not easy to be separated from the first containing part and the isolation part, thereby reducing the failure risk of the pressure release mechanism, and improving the reliability of the pressure release mechanism and the battery applying the pressure release mechanism.

[0079] The pressure release mechanism of the embodiments of the present disclosure can be applied to various batteries. The battery can be used for power supply of an electric device such as a vehicle, for example, to provide power for operation or driving of the vehicle. The battery can also be used for energy storage equipment. The battery can include a battery cell and a case for accommodating the battery cell. The battery cell can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., and the embodiments of the present disclosure are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc., and the embodiments of the present disclosure are not limited thereto.

[0080] The case can accommodate various forms of battery cells, for example, including a battery module including a plurality of battery cells in series, parallel, or mixed connection. The battery module can be installed in the case of the battery. The battery cell, as the smallest unit constituting the battery, can include an electrode assembly capable of electrochemical reaction.

[0081] The battery of the embodiments of the present disclosure can be applied to various electric devices using batteries. The electric device can be a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric vehicle, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc., the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc., the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, a power drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer. The embodiments of the present disclosure do not particularly limit the above-mentioned electric device.

[0082] Figure 1 is a structural schematic diagram of some embodiments of the electric device according to the present disclosure. For convenience, the electric device is taken as a vehicle for example. The vehicle 50 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car or a hybrid car, etc. The battery 10 can be arranged at the bottom, the front, the tail, etc. of the vehicle 50.

[0083] The battery 10 can be used for power supply of the vehicle 50, for example, the battery 10 can be used as an operating power source of the vehicle 50, for example, for the circuit system of the vehicle 50, for example, for the working power demand of the vehicle 50 during starting, navigation, and running. The battery 10 can not only be used as an operating power source of the vehicle 50, but also be used as a driving power source of the vehicle 50, to replace or partially replace fuel or natural gas to provide driving force for the vehicle 50.

[0084] The inside of the vehicle 50 can also be provided with an axle 53, a wheel 54, a motor 52, and a controller 51 for controlling the motor 52 to be powered by the battery 10, for example, to provide the required power for the motor 52 to rotate at a constant speed or to accelerate when the vehicle 50 is driven by the battery 10 as a power source. The motor 52 is used to drive the axle 53 to rotate, thereby driving the wheel to rotate.

[0085] Figure 2 is a structural schematic diagram of some embodiments of a battery according to the present disclosure. Figure 3 is a mounting structure schematic diagram of some embodiments of a pressure release mechanism according to the present disclosure. Figure 4 is an exploded schematic diagram of the mounting structure of some embodiments of a pressure release mechanism according to the present disclosure. Figure 5 is a structural schematic diagram of some embodiments of a pressure release mechanism according to the present disclosure in a perspective view along a first direction. Figure 6 is Figure 5 is an AA cross-sectional schematic diagram.

[0086] Referring to Figures 2-6 , the embodiments of the present disclosure provide a battery 10, comprising: a box body 11, a battery cell 12, and a pressure release mechanism 13, wherein the box body 11 has a containing cavity, the battery cell 12 is located in the containing cavity, and the pressure release mechanism 13 is arranged on at least one wall surface of the box body 11. The pressure release mechanism 13 comprises a valve body 20 and a valve core 30. The valve body 20 comprises an isolation portion 21, a first containing portion 22, and a second containing portion 23, the isolation portion 21 is located between the first containing portion 22 and the second containing portion 23 along a first direction dr1, and the isolation portion 21 has a first through hole 211 that communicates the first containing portion 22 and the second containing portion 23. The valve core 30 comprises a piston 31 and a guide 32, the guide 32 is movably arranged in the first through hole 211, the piston 31 is connected to one end of the guide 32 and can be sealingly fitted with the first containing portion 22. The second containing portion 23 is covered outside the guide 32, and the first containing portion 22, the second containing portion 23, and the isolation portion 21 are integrally formed.

[0087] The box 11 can provide functions of containing, supporting, cooling, sealing and anti-impact for the battery cells 12, and can avoid the adverse effects of external liquid or other foreign matters on the charging and discharging or safety of the battery cells 12. The box 11 has a plurality of walls enclosing a containing cavity for containing the battery cells 12, which can include a top wall, a bottom wall and side walls. For example, the pressure release mechanism 13 is arranged on the bottom wall or one or more side walls perpendicular to the bottom wall. The pressure release mechanism 13 can be arranged on at least one of the walls for releasing the internal pressure of the battery 10 to prevent the battery from exploding due to overpressure or overheating during charging, discharging or abnormal working conditions.

[0088] In Figure 2 The battery cells 12 are electrically connected to each other, such as in series, parallel or mixed connection, to achieve the required electrical performance parameters of the battery 10. The plurality of battery cells 12 are arranged in rows, and one or more rows of battery cells 12 can be arranged in the box as needed.

[0089] In some embodiments, the battery cells 12 of the battery 10 can be arranged along at least one of the length and width directions of the box 11. At least one row or column of battery cells 12 can be arranged as needed. According to the needs, one or more layers of battery cells 12 can also be arranged in the height direction of the battery 10.

[0090] In some embodiments, the plurality of battery cells 12 can be connected in series or parallel or mixed connection to form a battery module, and then a plurality of battery modules are connected in series or parallel or mixed connection to form a whole and are contained in the box 11. In other embodiments, all the battery cells 12 are directly connected in series or parallel or mixed connection, and the whole formed by the battery cells 12 is contained in the box 11.

[0091] The valve body 20 can be mounted on the wall of the box 11 and can be separated into a first containing part 22 and a second containing part 23 by a separation part 21 (such as a partition or a separation frame), and the first containing part 22 and the second containing part 23 are communicated through a first through hole 211 on the separation part 21. The separation part 21 has a structure capable of transmitting pressure to the piston 31 in addition to the first through hole 211, such as a through hole or a spacing part of a frame structure on the separation part 21, so that when the internal pressure of the box 11 is high, the piston 31 can be pushed away from the sealing position to achieve the effect of pressure release.

[0092] The valve core 30 cooperates with the valve body 20 to realize movement relative to the valve body 20, the guide 32 cooperates with the first through hole 211 to realize movement relative to the first through hole 211, and the piston 31 connected with the guide 32 can be in sealing cooperation with the first containing portion. When the piston 31 is away from the sealing position under the action of the inner side pressure, the guide 32 can realize effective guiding action on the movement of the piston 31, and the risk that the piston 31 is skewed or stuck due to movement and affects the smooth action of the pressure release mechanism is reduced.

[0093] In Figure 5 and Figure 6 , the first direction dr1 is consistent with the movement direction guided by the guide 32 of the valve core 30, and the direction can be perpendicular to the wall surface on which the pressure release mechanism 13 is arranged. The second direction dr2 and the third direction dr3 are both perpendicular to the first direction dr1, and the second direction dr2 and the third direction dr3 are perpendicular to each other.

[0094] The second containing portion 23 covers the outer side of the guide 32 passing through the first through hole 211, realizing the protection of the guide 32 from dust and other impurities on the outer side of the pressure release mechanism. The first containing portion 22, the second containing portion 23 and the isolation portion 21 can be made by an integral molding process to form an integral molding structure, for example, by injection molding, extrusion molding, additive manufacturing and the like to form an integrated part of the first containing portion 22, the second containing portion 23 and the isolation portion 21.

[0095] The pressure release mechanism 13 can be an explosion-proof valve, a pressure relief valve, etc., which can realize the release of the pressure inside the box body to prevent the battery from exploding due to overpressure or overheating under charging, discharging or abnormal working conditions.

[0096] In the embodiment, the release of the pressure inside the box body 11 of the battery is realized by arranging the pressure release mechanism 13 on the wall surface of the box body 11 of the battery, to prevent the battery from exploding due to overpressure or overheating under charging, discharging or abnormal working conditions. The valve core 30 of the pressure release mechanism 13 cooperates with the valve body 20, so that the piston 31 is in sealing cooperation with the first containing portion 22 of the valve body 20, the guide 32 of the valve core 30 is connected with the piston 31 to realize the guiding of the movement of the piston 31, and the second containing portion 23 covers the outer side of the guide 32 to realize the protection of the guide 32. By making the first containing portion 22, the second containing portion 23 and the isolation portion 21 into an integral molding structure, not only the number of parts inside the pressure release mechanism 13 can be reduced, but also the second containing portion 23 is not easy to be separated from the first containing portion 22 and the isolation portion 21, thereby reducing the risk of failure of the pressure release mechanism 13, and improving the reliability of the pressure release mechanism 13 and the battery applying the pressure release mechanism 13.

[0097] Figure 7 and Figure 8 are structural schematic diagrams of the valve core in different perspective views according to some embodiments of the pressure release mechanism of the present disclosure. Figure 9 is a structural schematic diagram of the valve core in a perspective view along a first direction according to some embodiments of the pressure release mechanism of the present disclosure. Figure 10 is Figure 9 is a BB cross-sectional schematic diagram of Figure 6 and Figure 10 In some embodiments, the piston 31 and the guide 32 are integrally formed structures.

[0098] The piston 31 and the guide 32 can be made by an integral forming process to form an integrally formed structure, such as an integrated part of the piston 31 and the guide 32 formed by injection molding, extrusion molding, additive manufacturing, etc.

[0099] In the present embodiment, by making the piston 31 and the guide 32 integrally formed structures, not only the number of parts in the pressure release mechanism can be reduced, but also the guide 32 is not easy to be separated from the piston 31, thereby reducing the failure risk of the pressure release mechanism, thereby improving the reliability of the pressure release mechanism and the battery applying the pressure release mechanism.

[0100] Referring to Figures 4-6 In some embodiments, the pressure release mechanism 13 further comprises an elastic member 40 connected between the valve body 20 and the valve core 30 and located in the second accommodating portion 23, for keeping the piston 31 in sealing cooperation with the first accommodating portion 22 by the elastic force of the elastic member 40.

[0101] The elastic member 40 can keep the piston 31 in sealing cooperation with the first accommodating portion 22 by the elastic force, and when the pressure inside the box exceeds a certain threshold, the piston 31 is pushed outward to overcome the elastic force of the elastic member 40, thereby completing the process of pressure release. After the pressure drops, the piston 31 can be reset to the position of sealing cooperation with the first accommodating portion 22 under the elastic force of the elastic member 40. The elastic member 40 can adopt elements capable of achieving elastic force, such as springs, elastic sheets, etc. In order to prevent dust and other impurities inside the box from affecting the elastic member 40, the second accommodating portion 23 is sleeved outside the elastic member 40 to form a protective effect.

[0102] In the present embodiment, by forming a protective effect on the elastic member 40 through the second accommodating portion 23 integrally formed with the isolation portion 21 and the first accommodating portion 22, the influence of dust and other impurities outside the pressure release mechanism on the elastic member 40 can be reduced, and the operation reliability of the pressure release mechanism is improved.

[0103] Referring to Figures 4-6In some embodiments, the elastic member 40 includes a spring 41, which is sleeved on the extended portion of the guide 32 relative to the first through hole 211; the valve core 30 further includes a bottom plug 33, which is detachably arranged at the end of the guide 32 away from the piston 31 and located in the second accommodating portion 23; wherein one end of the spring 41 abuts against the isolation portion 21, and the other end abuts against the bottom plug 33.

[0104] In Figure 6 In some embodiments, the bottom plug 33 is partially sleeved on the end of the guide 32 and is fixed with the guide 32 through a detachable connecting structure. The bottom plug 33 can have a circumferential flange for abutting against the spring 41 in the guiding direction of the guide 32.

[0105] In the present embodiment, the spring 41 is sleeved on the extended portion of the guide 32 relative to the first through hole 211, and the two ends thereof abut against the isolation portion 21 and the bottom plug 33 respectively, so as to facilitate the formation of uniform elastic force in the same direction as the guiding direction realized by the guide 32. The detachable connection between the bottom plug 33 and the end of the guide 32 can facilitate the maintenance and replacement of the spring 41.

[0106] Reference Figures 6-10 In some embodiments, the end of the guide 32 away from the piston 31 is provided with a clamping groove 321, the end of the guide 32 away from the piston 31 penetrates through the bottom plug 33, and the bottom plug 33 is fixed by embedding the clamping ring 34 into the clamping groove 321.

[0107] The bottom plug 33 can be provided with a through hole structure or a groove structure so that the end of the guide 32 penetrates through. The end structure of the guide 32 can be arranged according to the through hole structure or the groove structure on the bottom plug 33, for example, a protruding structure penetrating through the groove structure on the side of the bottom plug 33, and the clamping groove 321 is arranged on the protruding structure. The clamping ring 34 can be embedded in the clamping groove 321 to realize the restraining action on the clamping groove 321, and the clamping ring 34 can also be conveniently removed when disassembled.

[0108] In the present embodiment, the clamping groove 321 of the guide 32 away from the piston 31 is fixed by the clamping ring 34, which not only makes the spring 41 stably abut against the bottom plug 33, but also makes the bottom plug 33 more convenient to disassemble.

[0109] Reference Figures 4-10 In some embodiments, the valve core 30 further includes a ferromagnetic member 35, which abuts against the piston 31 and has a fixing hole 351. The piston 31 has an injection riveting structure 311 passing through the fixing hole 351.

[0110] The ferromagnetic piece 35 can be in the shape of a plate, a block or other shapes, and can be attracted by magnetic force. By abutting and fixing the ferromagnetic piece 35 against the piston 31, the piston 31 can be moved by the magnetic force of the ferromagnetic piece 35, so that the piston 31 is moved away from the sealing position from the outside, so as to inflate the box through the pressure release mechanism to detect the air tightness. The fixing hole 351 on the ferromagnetic piece 35 can be one or more. The piston 31 can form an injection riveting structure 311 through the fixing hole 351 on the ferromagnetic piece 35. During injection, the molten plastic material forms a rivet joint on the side of the ferromagnetic piece 35 away from the piston 31 through the fixing hole 351, so that the piston 31 and the ferromagnetic piece 35 are injection molded as a whole.

[0111] In the embodiment, the piston 31 forms an injection riveting structure 311 through the fixing hole 351 on the ferromagnetic piece 35, so that the piston 31 and the ferromagnetic piece 35 are injection molded as a whole by insert injection molding or the like. This reduces the number of parts in the pressure release mechanism, saves the assembly process between the piston 31 and the ferromagnetic piece and other structures of the pressure release mechanism, and is conducive to improving the reliability of the pressure release mechanism.

[0112] The injection riveting structure 311 through the fixing hole 351 can eliminate the need to provide plastic material on the circumferential outer side of the ferromagnetic piece 35 for limiting the ferromagnetic piece 35, so as to facilitate the fixation of the ferromagnetic piece 35 by the external tooling during the molding of the piston 31, and reduce the risk of position displacement of the ferromagnetic piece 35 during the molding.

[0113] Reference Figure 6 and Figure 10 In some embodiments, the ferromagnetic piece 35 is in the shape of a plate, has a third through hole 352 for the guide 32 to pass through, and is located on the side of the piston 31 adjacent to the isolation portion 21 along the first direction dr1.

[0114] In the embodiment, the ferromagnetic piece 35 is provided in the shape of a plate, which can reduce the space occupation in the guiding direction of the guide 32. The ferromagnetic piece 35 is provided on the side of the piston 31 adjacent to the isolation portion 21, so that it is not easy to fall off under the action of external force and is not easy to be corroded. The guide 32 passes through the third through hole 352 on the ferromagnetic piece 35, which is conducive to keeping the magnetic force consistent with the guiding direction of the guide 32, so that the piston 31 is more smoothly opened under the action of the magnetic force.

[0115] Figure 11 and Figure 12 are structural schematic diagrams of the valve body in different perspective views according to some embodiments of the pressure release mechanism of the present disclosure. Figure 13 is a structural schematic diagram of the valve body in the view along the first direction according to some embodiments of the pressure release mechanism of the present disclosure. Figure 14 is a CC cross-sectional schematic diagram of Figure 13 ReferenceFigure 6 、 Figures 12-14 In some embodiments, the second accommodating portion 23 comprises a sleeve segment 231 connected with the isolation portion 21, and the valve body 20 further comprises a protective cover 232. The protective cover 232 is detachably arranged at the end of the sleeve segment 231 away from the isolation portion 21.

[0116] The protective cover 232 can be provided with a plurality of clamping grooves for clamping and fixing with the clamping hooks at the end of the sleeve segment 231, so as to close the opening of the sleeve segment 231. The hollow part of the sleeve segment 231 cooperates with the protective cover 232 to form a protective effect on the elastic member 40, the guide member 32 and the clamping ring 34. During assembly, the elastic member 40 can be loaded from the opening side of the sleeve segment 231, and after the elastic member 40 is installed with the guide member 32, the opening of the sleeve segment 231 is closed by the protective cover 232.

[0117] In the present embodiment, the hollow part of the sleeve segment 231 achieves the protective effect on the elastic member 40, the guide member 32 and the like, and the detachable connection of the protective cover 232 relative to the sleeve segment 231 of the second accommodating portion 23 simplifies the assembly.

[0118] Referring to Figures 4-6 and Figures 11-14 In some embodiments, the valve body 20 further comprises a first sealing member 24, and the first sealing member 24 is integrally formed with the first accommodating portion 22. The piston 31 is in sealing cooperation with the first accommodating portion 22 through the first sealing member 24 in the first accommodating portion 22.

[0119] The first sealing member 24 and the first accommodating portion 22 can be combined into an integral structure by injection molding or vulcanization and the like. In Figure 14 , it can be seen that the first accommodating portion 22 has a first mounting groove 221, and the first sealing member 24 is embedded in the first mounting groove 221 and tightly combined with the first mounting groove 221.

[0120] The first sealing member 24 is in sealing cooperation with the first accommodating portion 22 through the first sealing member 24 in the first accommodating portion 22, and the first sealing member 24 is integrally formed with the first accommodating portion 22. In this way, the number of parts in the pressure release mechanism can be reduced, the assembly process of the first sealing member 24 on the valve body 20 is saved, and the reliability of the pressure release mechanism is improved.

[0121] Referring to Figure 6 and Figure 14 In some embodiments, the first sealing member 24 comprises a sealing ring, and the sealing ring has at least two annular protrusions 241 protruding in the first direction dr1, and the at least two annular protrusions 241 are arranged in the radial direction.

[0122] InFigure 6 and Figure 14 In the embodiment, the at least two annular protrusions 241 of the sealing ring are pressed against the piston 31, forming a double or more sealing effect, thereby achieving a better sealing effect.

[0123] In the embodiment, the at least two annular protrusions 241 of the sealing ring are pressed against the piston 31, forming a double or more sealing effect, thereby achieving a better sealing effect.

[0124] Referring to Figure 6 and Figure 14 In some embodiments, the isolation portion 21 has a second mounting groove 25, and the valve body 20 further comprises a second sealing member 26 embedded in the second mounting groove 25 and used for pressing and sealing the valve body 20 and the wall surface.

[0125] In the embodiment, the second sealing member 26 embedded in the second mounting groove 25 of the isolation portion 21 is arranged to form a pressing and sealing with the tank wall surface, which can improve the air tightness of the joint between the tank wall surface and the isolation portion 21 and reduce the possibility of pressure leakage.

[0126] Referring to Figure 4 , Figures 11-14 In some embodiments, the valve body 20 further comprises a plurality of insert nuts 27 embedded in the isolation portion 21.

[0127] The insert nuts 27 are embedded in the isolation portion 21 to form an integral structure with the isolation portion 21, and the threaded holes of each insert nut 27 can be penetrated in the first direction dr1. Figures 11-13 In the embodiment, four insert nuts 27 can be arranged near the four corners of the isolation portion 21.

[0128] In the embodiment, the insert nuts 27 are embedded in the isolation portion 21 to form an integral structure with the isolation portion 21, which is more convenient and reliable during installation. Moreover, under the reliable connection of the insert nuts 27, the second sealing member 26 can be pressed at the joint between the tank wall surface and the isolation portion 21, further improving the sealing effect.

[0129] Referring to Figure 7 and Figure 8 In some embodiments, the guide 32 is a non-rotational body.

[0130] The non-rotationally symmetrical structure herein refers to a structure whose cross section at each position along the first direction dr1 includes a non-circular cross section, such as a prism with a polygonal cross section, an elliptic cylinder with an elliptical cross section, and also a non-rotationally symmetrical structure formed by providing a protrusion or a groove on a cylindrical structure.

[0131] In the present embodiment, the guide 32 in a non-rotationally symmetrical structure cooperates with the valve body 20, which can conveniently realize the anti-rotation function of the guide 32 and the piston 31 connected thereto, thereby effectively reducing the risk of affecting the failure of the pressure release mechanism due to the rotation of the piston 31.

[0132] Reference Figure 7 , Figure 8 , Figure 11 and Figure 13 In some embodiments, the guide 32 includes a cylindrical segment 322 and a protrusion 323 provided on the outer wall of the cylindrical segment 322 and extending along the first direction dr1, the first through hole 211 includes a cylindrical hole 211a, the cylindrical hole 211a is in sliding cooperation with the cylindrical segment 322, and the hole wall of the cylindrical hole 211a has a groove 211b extending through along the first direction dr1 and in sliding cooperation with the protrusion 323.

[0133] The cylindrical segment 322 of the guide 32 and the protrusion 323 extending along the first direction dr1 on the outer wall thereof together form a non-rotationally symmetrical structure. The protrusion 323 can be injection molded together with the cylindrical segment 322 of the guide 32, and the groove 211b can also be injection molded together when forming the cylindrical hole 211a, thereby realizing the key and groove cooperation and effectively inhibiting the rotation of the piston 31.

[0134] In the present embodiment, by making the cylindrical hole 211a of the first through hole 211 in sliding cooperation with the cylindrical segment 322, and the groove 211b extending through along the first direction dr1 on the hole wall of the cylindrical hole 211a in sliding cooperation with the protrusion 323, on the one hand, the guide 32 can run more smoothly relative to the orientation of the first through hole 211, and on the other hand, the guide 32 can also be effectively prevented from rotating relative to the first through hole 211, thereby reducing the risk of affecting the failure of the pressure release mechanism due to the rotation of the piston 31 relative to the valve body 20.

[0135] Reference Figures 3-14The embodiment of the present disclosure further provides a pressure release mechanism 13, comprising a valve body 20 and a valve core 30. The valve body 20 comprises an isolation part 21, a first accommodating part 22 and a second accommodating part 23, the isolation part 21 is located between the first accommodating part 22 and the second accommodating part 23 along a first direction dr1, and the isolation part 21 has a first through hole 211 communicating the first accommodating part 22 and the second accommodating part 23. The valve core 30 comprises a piston 31 and a guide 32, the guide 32 is movably arranged in the first through hole 211, the piston 31 is connected with one end of the guide 32 and can be in sealing cooperation with the first accommodating part 22; wherein the second accommodating part 23 is covered outside the elastic member 40 and the guide 32, and the first accommodating part 22, the second accommodating part 23 and the isolation part 21 are in an integrated structure.

[0136] In the embodiment, the valve core 30 of the pressure release mechanism 13 cooperates with the valve body 20, so that the piston 31 is in sealing cooperation with the first accommodating part 22 of the valve body 20, the guide 32 of the valve core 30 is connected with the piston 31 to realize the guidance of the movement of the piston 31, and the second accommodating part 23 is covered outside the guide 32 to realize the protection of the guide 32. By making the first accommodating part 22, the second accommodating part 23 and the isolation part 21 in an integrated structure, not only the number of parts in the pressure release mechanism 13 can be reduced, but also the second accommodating part 23 is not easy to be separated from the first accommodating part 22 and the isolation part 21, thereby reducing the failure risk of the pressure release mechanism 13, and improving the reliability of the pressure release mechanism 13 and the battery applying the pressure release mechanism 13.

[0137] The related structure of the pressure release mechanism 13 can refer to the description of the pressure release mechanism 13 in the battery 10 in the foregoing embodiments, and will not be described here.

[0138] In one aspect of the present disclosure, a power consuming device is provided, comprising the battery 10 of any of the foregoing embodiments or the pressure release mechanism 13 of any of the foregoing embodiments.

[0139] In the embodiment, the power consuming device adopting the battery 10 or the pressure release mechanism 13 has better reliability.

[0140] According to Figures 1-14 , the specific embodiments of the battery comprising the pressure release mechanism are described below.

[0141] The battery 10 comprises a box body 11, a battery cell 12 and a pressure release mechanism 13, wherein the box body 11 has a containing cavity, the battery cell 12 is located in the containing cavity, and the pressure release mechanism 13 is arranged on at least one wall surface of the box body 11. The pressure release mechanism 13 comprises a valve body 20, a valve core 30 and a spring 41. The valve body 20 comprises an isolation part 21, a first containing part 22 and a second containing part 23, the isolation part 21 is located between the first containing part 22 and the second containing part 23 along a first direction dr1, and the isolation part 21 has a first through hole 211 communicating the first containing part 22 and the second containing part 23.

[0142] The valve core 30 comprises a piston 31, a guide 32, a bottom plug 33 and a ferromagnetic part 35, the guide 32 is movably arranged in the first through hole 211, the piston 31 is connected with one end of the guide 32 and can be in sealing cooperation with the first containing part 22, and the second containing part 23 covers the outside of the guide 32 and the spring 41.

[0143] The first containing part 22, the second containing part 23 and the isolation part 21 are in an integral molding structure. The piston 31 and the guide 32 are in an integral molding structure.

[0144] The spring 41 is connected between the valve body 20 and the valve core 30, is sleeved on the protruding part of the guide 32 relative to the first through hole 211, one end of the spring 41 abuts against the isolation part 21, and the other end abuts against the bottom plug 33. The bottom plug 33 is detachably arranged at the end of the guide 32 away from the piston 31 and is located in the sleeve section 231. The end of the guide 32 away from the piston 31 is provided with a clamping groove 321, the end of the guide 32 away from the piston 31 passes through the bottom plug 33, and the bottom plug 33 is fixed by embedding the clamping ring 34 into the clamping groove 321.

[0145] The second containing part 23 comprises a sleeve section 231 connected with the isolation part 21, and the valve body 20 further comprises a protective cover 232 detachably arranged at the end of the sleeve section 231 away from the isolation part 21.

[0146] The ferromagnetic part 35 abuts against the piston 31 and has a fixing hole 351, and the piston 31 has an injection riveting structure 311 passing through the fixing hole 351. The ferromagnetic part 35 is in a plate shape and has a third through hole 352 for the guide 32 to pass through, and the ferromagnetic part 35 is located on the side of the piston 31 adjacent to the isolation part 21 along the first direction dr1.

[0147] The valve body 20 further comprises a first sealing member 24 and a second sealing member 26, the first sealing member 24 is integrally formed with the first accommodating portion 22, and the piston 31 is sealingly fitted with the first accommodating portion 22 through the first sealing member 24. The first sealing member 24 comprises a sealing ring having at least two annular protrusions 241 protruding in the first direction dr1, and the at least two annular protrusions 241 are arranged in a radial direction. The isolation portion 21 has a second mounting groove 25, the second sealing member 26 is embedded in the second mounting groove 25, and is used for the compression sealing between the valve body 20 and the wall surface. The valve body 20 further comprises a plurality of insert nuts 27 embedded in the isolation portion 21.

[0148] The guide 32 comprises a columnar segment 322 and a protruding rib 323 arranged on the outer wall of the columnar segment 322 and extending in the first direction dr1, the first through hole 211 comprises a columnar hole 211a, the columnar hole 211a is slidingly fitted with the columnar segment 322, and the hole wall of the columnar hole 211a has a groove 211b penetrating through in the first direction dr1 and slidingly fitted with the protruding rib 323.

[0149] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0150] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A battery (10) characterized by, The battery pack comprises a box (11), a battery cell (12) and a pressure release mechanism (13), wherein the box (11) has a containing cavity, the battery cell (12) is located in the containing cavity, and the pressure release mechanism (13) is arranged on at least one wall surface of the box (11); the pressure release mechanism (13) comprises: a valve body (20) comprising an isolation part (21), a first containing part (22) and a second containing part (23), the isolation part (21) is located between the first containing part (22) and the second containing part (23) along a first direction (dr1), the isolation part (21) has a first through hole (211) communicating the first containing part (22) and the second containing part (23); and a valve core (30) comprising a piston (31) and a guide (32), the guide (32) is movably arranged in the first through hole (211), the piston (31) is connected with one end of the guide (32) and can be sealingly matched with the first containing part (22); wherein the second containing part (23) covers the outside of the guide (32), and the first containing part (22), the second containing part (23) and the isolation part (21) are integrally formed. The piston (31) and the guide (32) are integrally formed. The pressure release mechanism (13) further comprises an elastic member (40) connected between the valve body (20) and the valve core (30) and located in the second containing part (23), for keeping the piston (31) in sealing cooperation with the first containing part (22) by the elastic force acting on the valve core (30). The elastic member (40) comprises a spring (41) sleeved on the protruding part of the guide (32) relative to the first through hole (211); the valve core (30) further comprises:

2. The battery (10) according to claim 1, characterized in that a bottom plug (33) detachably arranged at the end of the guide (32) away from the piston (31) and located in the second containing part (23); 3. The battery (10) according to claim 1 or 2, characterized in that wherein one end of the spring (41) abuts against the isolation part (21) and the other end abuts against the bottom plug (33).

4. The battery (10) according to claim 3, characterized in that The end of the guide (32) away from the piston (31) is provided with a clamping groove (321), the end of the guide (32) away from the piston (31) passes through the bottom plug (33), and the bottom plug (33) is fixed by embedding the clamping ring (34) into the clamping groove (321). The second containing part (23) comprises a sleeve segment (231) connected with the isolation part (21), and the valve body (20) further comprises: a protective cover (232) detachably arranged at the end of the sleeve segment (231) away from the isolation part (21).

5. The battery (10) according to claim 4, characterized in that The valve core (30) further comprises:

6. The battery (10) of claim 3, wherein, a ferromagnetic member (35) abutting against the piston (31) and having a fixing hole (351); wherein the piston (31) has an injection riveting structure (311) passing through the fixing hole (351). ​ 7. The battery (10) of claim 1, wherein, ​ ​ ​ 8. The battery (10) according to claim 7, characterized in that The ferromagnetic member (35) is plate-shaped and has a third through hole (352) through which the guide member (32) passes, and the ferromagnetic member (35) is located on the side of the piston (31) adjacent to the isolation portion (21) along the first direction (dr1).

9. The battery (10) of claim 1, wherein, The valve body (20) further comprises a first sealing member (24) which is integrally formed with the first accommodating portion (22), and the piston (31) is in sealing cooperation with the first accommodating portion (22) through the first sealing member (24) in the first accommodating portion (22).

10. The battery (10) according to claim 9, characterized in that The first sealing member (24) comprises a sealing ring having at least two annular protrusions (241) protruding along the first direction (dr1), and the at least two annular protrusions (241) are arranged along the radial direction.

11. The battery (10) of claim 1, wherein, The isolation portion (21) has a second mounting groove (25), and the valve body (20) further comprises a second sealing member (26) embedded in the second mounting groove (25) and used for the compression sealing of the valve body (20) and the wall surface.

12. The battery (10) of claim 1, wherein, The valve body (20) further comprises a plurality of insert nuts (27) embedded in the isolation portion (21).

13. The battery (10) of claim 1, wherein, The guide member (32) is a non-rotational body.

14. The battery (10) according to claim 13, characterized in that The guide member (32) comprises a columnar section (322) and a protruding rib (323) arranged on the outer wall of the columnar section (322) and extending along the first direction (dr1), the first through hole (211) comprises a columnar hole (211a) in sliding cooperation with the columnar section (322), and the hole wall of the columnar hole (211a) has a groove (211b) penetrating along the first direction (dr1) and in sliding cooperation with the protruding rib (323).

15. A pressure release mechanism (13) characterized by, Comprising: a valve body (20) comprising an isolation portion (21), a first accommodating portion (22) and a second accommodating portion (23), the isolation portion (21) being located between the first accommodating portion (22) and the second accommodating portion (23) along a first direction (dr1), and the isolation portion (21) having a first through hole (211) connecting the first accommodating portion (22) and the second accommodating portion (23); and a valve core (30) comprising a piston (31) and a guide member (32), the guide member (32) being movably arranged in the first through hole (211), and the piston (31) being connected to one end of the guide member (32) and capable of being in sealing cooperation with the first accommodating portion (22); wherein the second accommodating portion (23) covers the outer side of the guide member (32), and the first accommodating portion (22), the second accommodating portion (23) and the isolation portion (21) are integrally formed.

16. An electrical device, comprising: Comprising: the battery (10) of any one of claims 1-14, or the pressure release mechanism (13) of claim 15.

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