Battery pack, explosion-proof valve and electric equipment

Abstract

The utility model provides a battery pack, an explosion-proof valve and electric equipment, the battery pack comprises a battery box body, the first top surface of the battery box body is provided with a through mounting hole, and the first top surface is also provided with a sealing groove; the anti-explosion valve is mounted in the mounting hole; the first sealing piece is fixed in the sealing groove, and the first sealing piece abuts against the first bottom face of the anti-explosion valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and more specifically, relates to a battery pack, an explosion-proof valve and electrical equipment. Background Art

[0002] The temperature of the relevant battery pack will change during the charging and discharging process, which will cause the air pressure in the battery box to change. An explosion-proof valve is installed in the battery box to balance the air pressure inside and outside the battery box. In order to reduce the risk of external gas or liquid entering the battery box, a sealing ring is installed on the explosion-proof valve. The sealing ring on the relevant explosion-proof valve is difficult to process, and the explosion-proof valve is easy to break during the processing, which affects the structural strength of the explosion-proof valve. Utility Model Content

[0003] In view of this, the utility model provides a battery pack, an explosion-proof valve and an electrical device to solve the technical problem of how to improve the structural strength of the explosion-proof valve.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The present invention provides a battery pack, comprising:

[0006] A battery box, wherein a first top surface of the battery box is provided with a through mounting hole, and the first top surface is also provided with a sealing groove;

[0007] An explosion-proof valve, at least partially mounted in the mounting hole;

[0008] The first sealing member is fixed in the sealing groove, and the first sealing member abuts against the first bottom surface of the explosion-proof valve.

[0009] In some embodiments, the first bottom surface of the explosion-proof valve is a plane.

[0010] In some embodiments, a protrusion is disposed on the first bottom surface of the explosion-proof valve, and the protrusion presses against the first sealing member.

[0011] In some embodiments, the sealing groove is disposed around the mounting hole, and the sealing groove overlaps with an orthographic projection of the first bottom surface of the explosion-proof valve.

[0012] In some embodiments, the sealing groove is configured in a circular ring shape, a square ring shape, or an elliptical ring shape.

[0013] In some embodiments, the first sealing member protrudes from the first top surface of the battery case.

[0014] In some embodiments, the first sealing member is configured as a flexible component, and under the compression of the first bottom surface and the first top surface, the first sealing member is deformed to fit the first bottom surface.

[0015] In some embodiments, the first sealing member is interference fit with the sealing groove;

[0016] Or, the first sealing member is bonded to the sealing groove;

[0017] Alternatively, the first sealing member is snap-fitted to the sealing groove.

[0018] The utility model also provides an explosion-proof valve, comprising:

[0019] The valve body is provided with a penetrating vent hole;

[0020] A valve core assembly is movably connected to the valve body to open and close the air vent;

[0021] The first bottom surface of the valve body is set as a plane, and the first bottom surface is used to fit in contact with the first top surface of the battery box in the battery pack, wherein the first top surface of the battery box is installed with a first sealing member, and the first bottom surface presses against the first sealing member;

[0022] Alternatively, a protrusion is provided on the first bottom surface of the valve body, and the first bottom surface is used to fit in contact with the first top surface of a battery box in the battery pack, wherein a first seal is installed on the first top surface of the battery box, and the protrusion presses against the first seal.

[0023] In some embodiments, the valve core assembly includes:

[0024] A guide rod is passed through the valve body to be movably connected to the valve body;

[0025] A piston connected to the upper end of the guide rod;

[0026] a second sealing member fixed to the top of the valve body;

[0027] The elastic member is in contact between the guide rod and the valve body to drive the piston to press the second sealing member through elastic force to seal the air vent.

[0028] In some embodiments, the first top surface is further provided with a sealing groove, and the orthographic projection of the first bottom surface of the explosion-proof valve overlaps with the sealing groove.

[0029] The present utility model also provides an electrical device, including:

[0030] A battery pack according to any of the above items.

[0031] The embodiment of the utility model provides a battery pack, an explosion-proof valve and an electrical device, wherein the first top surface of the battery box in the battery pack is provided with a through mounting hole, the first top surface is also provided with a sealing groove, the explosion-proof valve is at least partially installed in the mounting hole, the first sealing member is fixed in the sealing groove, and the first sealing member abuts against the first bottom surface of the explosion-proof valve. The embodiment of the utility model sets the sealing groove on the first top surface of the battery box, and since the structural dimensions of the battery box are larger than the structural dimensions of the explosion-proof valve, the processing difficulty of the sealing groove is reduced, the risk of the explosion-proof valve being broken due to insufficient processing precision of the sealing groove is avoided, the processing procedures of the explosion-proof valve are reduced, and the structural strength of the explosion-proof valve is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional diagram of an electrical device according to an embodiment of the utility model;

[0033] Figure 2 An exploded diagram of an electrical device according to an embodiment of the utility model;

[0034] Figure 3 A top view of an electrical device according to an embodiment of the utility model;

[0035] Figure 4 for Figure 3 Sectional view along line AA.

[0036] Description of reference numerals:

[0037] 1. Battery case; 11. First top surface; 12. Mounting hole; 13. Sealing groove; 2. Explosion-proof valve; 21. First bottom surface; 22. Valve body; 23. Valve core assembly; 231. Guide rod; 232. Piston; 233. Second sealing member; 234. Elastic member; 24. Air vent; 3. First sealing member. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present utility model, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present utility model, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present utility model, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present invention, the directions or positional relationships indicated by the technical terms "width", "inside", "outside", "bottom", "upper", "lower", etc. are based on the attached Figure 1 and attached Figure 3 The orientation or positional relationship shown is only for the convenience of describing the embodiments of the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model.

[0044] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0045] In the description of the embodiments of the present utility model, unless otherwise clearly stipulated and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact or contact through an intermediate medium layer. It can be contact with essentially no interaction force between the two contacting parties, or it can be contact with interaction force between the two contacting parties.

[0046] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0047] As part of the creative concept of the present invention, before describing the embodiments of the present invention, it is necessary to analyze the reasons why the explosion-proof valve is prone to failure during the processing of the battery box in the related technology, and obtain the technical solution of the embodiments of the present invention through reasonable analysis.

[0048] In the relevant battery box, the temperature of the battery pack will change during the charging and discharging process, which will cause the air pressure in the battery box to change. By setting an explosion-proof valve in the battery box, the air pressure inside and outside the battery box can be balanced, thereby reducing the damage to the battery. In order to reduce the risk of external gas or liquid entering the battery box, a sealing ring is provided on the explosion-proof valve. When the explosion-proof valve is installed in the battery box, the sealing ring abuts against the surface of the explosion-proof valve and the battery box to isolate the inside and outside of the battery box. A sealing groove is provided on the relevant explosion-proof valve. The sealing ring is installed in the sealing groove, and then the explosion-proof valve equipped with the sealing ring is matched with the battery box. Since the size and shape of the sealing groove have an important influence on the sealing performance of the explosion-proof valve, therefore, in the process of machining the sealing groove on the explosion-proof valve, it is necessary to ensure high-precision machining requirements, and the machining difficulty is relatively high. If the machining progress of the sealing groove is insufficient, there is a risk of the valve body in the explosion-proof valve breaking; and the explosion-proof valve is made of high-strength, corrosion-resistant materials, and the above-mentioned materials have a large hardness, which further increases the difficulty of machining the sealing groove.

[0049] In view of this, the embodiment of the utility model reduces the difficulty of sealing groove processing by changing the position of the sealing groove to change the position of the sealing member, simplifies the processing steps of the explosion-proof valve, and reduces the risk of failure of the explosion-proof valve during the processing.

[0050] The solution of the embodiment of the utility model can be applied to, but not limited to, a battery pack including a battery cell or a battery module, and can also be applied to an electrical device including a battery cell and a battery pack. By transferring the sealing groove to the battery box, the processing steps of the explosion-proof valve are reduced, the risk of the explosion-proof valve breaking during the processing is reduced, the corresponding risk of the battery box including the explosion-proof valve is also reduced, and the corresponding risk of the electrical device including the battery box is also reduced.

[0051] An electric device is a device that uses electric energy as energy and realizes corresponding functions by consuming electric energy. For example, the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0052] The power-consuming device of the embodiment of the utility model may include a device body and a power supply device, the power supply device is used to supply power to the device body, and the power supply device may include a battery cell or a battery pack.

[0053] The main body of the device refers to the main structure that consumes electric energy to achieve the corresponding function. For example, the power-consuming device can be a mobile phone, and the main body of the device is the part that can achieve functions such as communication, and the battery cell or battery pack supplies power to the part that can achieve functions such as communication. For example, the power-consuming device can be a car, and the main body of the device is the part that can be used for people to sit and can be driven on the road, and the battery cell or battery pack supplies power to the part that can be used for people to sit and can be driven on the road.

[0054] A power supply device refers to a device that can output electric energy. For example, electric energy can be output through a battery cell. For example, electric energy can be output through a battery pack composed of battery cells. For example, electric energy can be output through a battery module composed of battery cells.

[0055] The electric device of one embodiment of the utility model is taken as an example of a vehicle for description.

[0056] The vehicle provided by one embodiment of the utility model can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery pack is arranged inside the vehicle, and the battery pack can be arranged at the bottom, head or tail of the vehicle. The battery pack can be used to power the vehicle. For example, the battery pack can be used as an operating power source for the vehicle. The vehicle may also include a controller and a motor, and the controller can be used to control the battery pack to power the motor. For example, the battery pack can be used for starting, navigating and driving the vehicle. Working power requirements.

[0057] In some embodiments of the present invention, the battery pack can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0058] The battery pack of the embodiment of the utility model may include a battery box and a battery cell, wherein the battery cell is located in the battery box. The battery box refers to a structure with a receiving space, wherein the battery cell is located in the battery box, and the battery cell of the battery pack is received by the battery box.

[0059] The number of battery cells can be multiple, and the multiple battery cells can be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells are both connected in series and in parallel. The multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells is placed in a battery case. Of course, the multiple battery cells can be first connected in series, in parallel, or in a mixed connection to form a battery module, and the multiple battery modules are then connected in series, in parallel, or in a mixed connection to form a whole, and the whole formed by the multiple battery modules connected in series, in parallel, or in a mixed connection is placed in a battery case. The battery pack may also include other structures. For example, the battery pack may also include a busbar component for realizing electrical connection between the multiple battery cells.

[0060] A battery cell is a basic unit that can realize the mutual conversion between chemical energy and electrical energy.

[0061] In the embodiment of the utility model, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0062] In the embodiment of the utility model, the battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., but the embodiment of the utility model is not limited to this.

[0063] The utility model provides a battery pack, such as Figure 1-Figure 4As shown, the battery pack includes a battery case 1, an explosion-proof valve 2 and a first sealing member 3. The battery case 1 has a storage space for accommodating a battery cell, and the first top surface 11 of the battery case 1 is provided with a through mounting hole 12, wherein the first top surface 11 represents the outer side of the battery case 1, wherein the side of the battery case 1 close to the storage space is the inner side, and the side away from the storage space is the outer side of the battery case 1; and the first top surface 11 is the upper surface of the battery case in normal use, and the normal use described in the embodiment of the utility model can be understood as the normal working state. The mounting hole 12 running through the first top surface 11 means that the mounting hole 12 connects the inner and outer sides of the first top surface 11, and it can also be understood that the mounting hole 12 connects the storage space inside the battery case 1 and the external environment. The first top surface 11 is also provided with a sealing groove 13, and the sealing groove 13 represents a groove-shaped structure with an opening at the top, and the top can be understood as the upper part in the normal use state. The explosion-proof valve 2 is at least partially installed in the mounting hole 12, which at least partially means that the explosion-proof valve 2 can be partially set in the mounting hole 12, and the other part is set outside the mounting hole 12. The explosion-proof valve 2 is used to balance the air pressure inside and outside the battery box to reduce damage to the battery pack. It should be noted that the embodiment of the utility model does not limit the specific type of the explosion-proof valve 2. For example, the explosion-proof valve can be a diaphragm explosion-proof valve, a safety valve, and a temperature-controlled explosion-proof valve. The type of the explosion-proof valve will not limit the function of the battery pack in the embodiment of the utility model.

[0064] like Figure 2 and Figure 4 As shown, the first seal 3 is fixed in the sealing groove 13. It should be noted that the embodiment of the utility model does not limit the fixing form of the first seal 3 and the sealing groove 13. For example, the first seal 3 can be connected to the sealing groove 13 by screw fixing, and the first seal 3 is fixed in the sealing groove 13 by screws; or, the first seal 3 can be connected to the sealing groove 13 by pressing and fixing, by setting the edge of the sealing groove 13 as a pressing mouth, placing the first seal 3 in the sealing groove 13, and pressing the first seal 3 in the sealing groove 13 by applying an external force; or, the first seal 3 and the sealing groove 13 can be fixed by heat sleeve, the first seal 3 is heated and sleeved in the sealing groove 13, and after cooling, the first seal 3 shrinks and fits tightly with the sealing groove 13; or, the first seal 3 and the sealing groove 13 can be fixed by adhesive.

[0065] like Figure 4As shown, when the first seal 3 is installed in the sealing groove 13, the first seal 3 at least partially protrudes from the first top surface 11, that is, no matter what method is used to fix the first seal 3 and the sealing groove 13, after the fixing is completed, the first seal 3 is at least partially higher than the first top surface 11. When the explosion-proof valve is installed on the battery box 1, the explosion-proof valve is fastened to the battery box 1, and the first bottom surface 21 of the explosion-proof valve abuts against the first seal 3, so that the first seal 3 is subjected to the compression force between the first bottom surface 21 of the explosion-proof valve and the battery box 1, so as to achieve a sealing effect.

[0066] It should be noted that the first bottom surface 21 of the explosion-proof valve represents the lower end surface of the explosion-proof valve in a normal use state, and the lower end surface is used to fit with the battery box 1.

[0067] It should be noted that the abutment described in the embodiment of the utility model refers to abutting contact, that is, the first sealing member 3 can be in close contact with the first bottom surface 21 of the explosion-proof valve, and the explosion-proof valve is tightly connected to the battery box 1 to achieve sealing between the explosion-proof valve and the battery box.

[0068] The embodiment of the utility model provides a battery pack, wherein the first top surface of the battery case is provided with a through mounting hole, the first top surface is also provided with a sealing groove, the explosion-proof valve is at least partially installed in the mounting hole, the first sealing member is fixed in the sealing groove, and the first sealing member abuts against the first bottom surface of the explosion-proof valve. The embodiment of the utility model sets the sealing groove on the first top surface of the battery case, and since the structural dimensions of the battery case are larger than the structural dimensions of the explosion-proof valve, the processing difficulty of the sealing groove is reduced, the risk of the explosion-proof valve being broken due to insufficient processing precision of the sealing groove is avoided, the processing procedures of the explosion-proof valve are reduced, and the structural strength of the explosion-proof valve is improved.

[0069] In some embodiments, Figure 4 As shown, the first bottom surface 21 of the explosion-proof valve is a plane. It should be noted that the first bottom surface 21 represents the surface of the explosion-proof valve close to the battery box 1. When the explosion-proof valve and the battery box are assembled, the first bottom surface 21 is close to the first top surface 11 of the battery box 1, and the first sealing member 3 abuts between the first bottom surface 21 and the first top surface 11. Among them, the plane means that the connection line between any two points on the first bottom surface 21 is a straight line. It can also be understood that there is no concave or convex structure on the first bottom surface 21. The embodiment of the utility model sets the first bottom surface 21 of the explosion-proof valve as a plane. On the one hand, there is no need to set the sealing groove on the first bottom surface, which reduces the processing steps of the explosion-proof valve and reduces the risk of failure of the explosion-proof valve; on the other hand, by setting the first bottom surface 21 as a plane, it is beneficial to increase the contact area between the first bottom surface 21 and the first top surface 11 or the first sealing member 3, thereby improving the fit between the explosion-proof valve and the battery box, and then improving the sealing of the explosion-proof valve.

[0070] In some embodiments, the first bottom surface 21 of the explosion-proof valve is provided with a raised portion, and the raised portion is pressed against the first sealing member 3, wherein the raised portion represents a structure that is raised relative to the first bottom surface 21. The embodiment of the utility model does not limit the molding method of the raised portion. For example, the raised portion can be integrally injection molded with the first bottom surface 21 of the explosion-proof valve, or integrally cut and molded, or the raised portion can be fixed to the first bottom surface 21 in other ways, as long as the raised portion is raised relative to the first bottom surface 21. The embodiment of the utility model is conducive to reducing the distance between the first bottom surface 21 and the first sealing member 3 by providing the raised portion on the first bottom surface 21, thereby increasing the pressing force between the raised portion and the first sealing member 3 after assembly, so as to enhance the deformation degree of the first sealing member 3, thereby increasing the contact area between the first sealing member 3 and the raised portion, and further improving the sealing performance between the explosion-proof valve and the battery box.

[0071] In some embodiments, Figure 2 As shown, the sealing groove 13 is arranged around the mounting hole 12, and the surrounding means that the sealing groove 13 is arranged on the outer side of the mounting hole 12 in the radial direction, and the sealing groove 13 extends along the circumference of the mounting hole 12 to form a closed annular groove. The sealing groove 13 overlaps with the orthographic projection of the first bottom surface 21 of the explosion-proof valve 2. It should be noted that the orthographic projection represents the projection of the sealing groove 13 to the first bottom surface 21 in the vertical direction, and the overlap of the projection with the first bottom surface 21, that is, the projection of the sealing groove 13 completely falls on the first bottom surface 21. Correspondingly, the first sealing member 3 is installed in the sealing groove 13, and the extension direction of the first sealing member 3 is consistent with the sealing groove 13, so that the orthographic projection of the first sealing member 3 also completely falls on the first bottom surface 21. When the explosion-proof valve and the battery box are assembled, the first sealing member 3 can completely contact the first bottom surface 21 in the circumferential direction.

[0072] The embodiment of the utility model overlaps the sealing groove 13 with the orthographic projection of the first bottom surface 21 of the explosion-proof valve 2, so that the fastening force between the explosion-proof valve 2 and the first top surface of the battery box can be evenly applied to the first sealing member 3 in the sealing groove 13, thereby improving the sealing performance of the explosion-proof valve and the battery box.

[0073] It should be noted that if Figure 2 As shown, the embodiment of the utility model does not limit the shape of the sealing groove 13. The sealing groove 13 can be set to a circular ring, a square ring or an elliptical ring. The shape of the sealing groove 13 in the embodiment of the utility model includes but is not limited to the above-mentioned several implementation methods, as long as the sealing groove 13 can form a closed ring in the circumferential direction. Figure 2 The sealing groove 13 in the illustrated embodiment is configured as a circular ring structure. By configuring the sealing groove 13 as a circular ring structure, it is helpful to reduce the difficulty of processing the sealing groove 13 and the difficulty of assembling the first sealing member 3 .

[0074] In some embodiments, Figure 4 As shown, the first sealing member 3 protrudes from the first top surface 11 of the battery case 1. Under the pressing action of the explosion-proof valve, the portion of the first sealing member 3 protruding from the first top surface 11 can be in close contact with the first bottom surface 21 of the explosion-proof valve, and the explosion-proof valve is tightly connected to the battery case 1, so the explosion-proof valve generates a large pressing force to press the first sealing member 3, so that the first sealing member 3 can be partially deformed under pressure to increase the contact area between the first sealing member 3 and the first bottom surface 21, thereby improving the sealing performance of the explosion-proof valve and the battery case.

[0075] In some embodiments, Figure 4 As shown, the first sealing member 3 is configured as a flexible component, wherein the flexible component indicates that the hardness of the first sealing member 3 is relatively low. When the explosion-proof valve is fastened to the battery case, the explosion-proof valve applies a fastening force to the first sealing member 3, and the first sealing member 3 is deformed under the action of the fastening force. That is to say, in the fastened state, the first bottom surface 21 of the explosion-proof valve and the first top surface 11 of the battery case jointly squeeze the first sealing member 3, causing the first sealing member 3 to deform, thereby increasing the contact area between the first sealing member 3 and the first top surface 11 or the first bottom surface 21, so as to improve the fit between the first sealing member 3 and the first top surface 11 or the first bottom surface 21, thereby improving the sealing between the explosion-proof valve and the battery case.

[0076] It should be noted that the first seal 3 in the embodiment of the utility model can be made of materials such as rubber and silicone. By setting the first seal to rubber or silicone, it is beneficial to enhance the corrosion resistance, cold resistance and wear resistance of the first seal 3 on the basis of improving the sealing performance.

[0077] In some embodiments, Figure 4 As shown, the first seal 3 and the sealing groove 13 are interference fit; in some embodiments, the first seal 3 and the sealing groove 13 are bonded; in some embodiments, the first seal 3 and the sealing groove 13 are clamped. It should be noted that the embodiments of the utility model do not limit the fixing method between the first seal 3 and the sealing groove 13. Specifically, in the embodiments where the first seal 3 and the sealing groove 13 are interference fit, the first seal 3 and the sealing groove 13 can be fixed by means of compression fixation or heat sleeve. In the embodiments where the first seal 3 and the sealing groove 13 are bonded, the first seal 3 and the sealing groove 13 can be fixed by an adhesive. In the embodiments where the first seal 3 and the sealing groove 13 are clamped, the first seal 3 and the sealing groove 13 can be provided with a corresponding clamping structure to achieve the limit of the set direction, thereby achieving the fixation of the relative position of the first seal 3 and the sealing groove 13.

[0078] In some embodiments, Figure 1-Figure 4As shown, a battery pack is provided, which includes a battery case 1, an explosion-proof valve 2 and a first sealing member 3. The first top surface 11 of the battery case 1 is provided with a through mounting hole 12, and the first top surface 11 is also provided with a sealing groove 13; the explosion-proof valve 2 is at least partially installed in the mounting hole 12; the first sealing member 3 is fixed in the sealing groove 13, and the first sealing member 3 abuts against the first bottom surface 21 of the explosion-proof valve 2. The first bottom surface 21 of the explosion-proof valve 2 is a plane. The sealing groove 13 is arranged around the mounting hole 12, and the sealing groove 13 overlaps with the orthographic projection of the first bottom surface 21 of the explosion-proof valve 2. The sealing groove 13 is arranged in a circular ring, a square ring or an elliptical ring. The first sealing member 3 protrudes from the first top surface 11 of the battery case 1. The first sealing member 3 is arranged as a flexible component, and under the extrusion of the first bottom surface 21 and the first top surface 11, the first sealing member 3 is deformed to fit the first bottom surface 21. The first sealing member 3 and the sealing groove 13 are interference-fitted; or, the first sealing member 3 and the sealing groove 13 are bonded; or, the first sealing member 3 and the sealing groove 13 are snap-fitted.

[0079] The utility model embodiment also provides an explosion-proof valve 2, such as Figure 1-Figure 4 As shown, the explosion-proof valve 2 can be applied to the battery pack described in any of the above embodiments. The explosion-proof valve 2 in the embodiment of the utility model includes a valve body 22 and a valve core assembly 23. The valve body 22 is provided with a through-hole 24. Figure 4 The reference numeral 24 in the structural diagram indicates the approximate position of the air vent 24, but does not indicate that the entity component indicated by the position is the air vent. The valve core assembly 23 is movably connected to the valve body 22 to open and close the air vent 24. It should be noted that the term "through" indicates that the air vent 24 connects the inside and outside of the battery case 1. The embodiment of the utility model does not limit the movable connection method between the valve core assembly 23 and the valve body 22, as long as the relative movement between the valve core assembly 23 and the valve body 22 can realize the switching of the opening and closing of the air vent 24.

[0080] The first bottom surface 21 of the valve body 22 is set as a plane, and the first bottom surface is used to fit and contact with the first top surface 11 of the battery case 1 in the battery pack, wherein the first top surface of the battery case is installed with a first seal 3, and the first bottom surface 21 presses against the first seal 3. The first bottom surface 21 represents the surface of the valve body 22 close to the battery case 1. When the explosion-proof valve and the battery case are assembled, the first bottom surface 21 is close to the first top surface 11 of the battery case 1, and the first seal 3 abuts between the first bottom surface 21 and the first top surface 11. The plane represents that the line between any two points on the first bottom surface 21 is a straight line. It can also be understood that there is no concave or convex structure on the first bottom surface 21. The embodiment of the utility model sets the first bottom surface 21 of the explosion-proof valve as a plane. On the one hand, there is no need to set the sealing groove on the first bottom surface, which reduces the processing steps of the explosion-proof valve and reduces the risk of failure of the explosion-proof valve. On the other hand, setting the first bottom surface 21 as a plane is conducive to increasing the contact area between the first bottom surface 21 and the first top surface 11 or the first sealing member 3, thereby improving the fit between the explosion-proof valve and the battery box, and further improving the sealing of the explosion-proof valve.

[0081] In some embodiments, the first bottom surface 21 of the explosion-proof valve is provided with a raised portion, and the raised portion is pressed against the first sealing member 3, wherein the raised portion represents a structure that is raised relative to the first bottom surface 21. The embodiment of the utility model does not limit the molding method of the raised portion. For example, the raised portion can be integrally injection molded with the first bottom surface 21 of the explosion-proof valve, or integrally cut and molded, or the raised portion can be fixed to the first bottom surface 21 in other ways, as long as the raised portion is raised relative to the first bottom surface 21. The embodiment of the utility model is conducive to reducing the distance between the first bottom surface 21 and the first sealing member 3 by providing the raised portion on the first bottom surface 21, thereby increasing the pressing force between the raised portion and the first sealing member 3 after assembly, so as to enhance the deformation degree of the first sealing member 3, thereby increasing the contact area between the first sealing member 3 and the raised portion, and further improving the sealing performance between the explosion-proof valve and the battery box.

[0082] In some embodiments, Figure 4 As shown, the valve core assembly 23 includes a guide rod 231, a piston 232, a second sealing member 233 and an elastic member 234. The guide rod 231 is inserted through the valve body 22, and the guide rod 231 is movably connected to the valve body 22. The piston 232 is connected to the upper end of the guide rod 231. It should be noted that the upper end represents the top of the guide rod when the explosion-proof valve is in normal working condition. The second sealing member 233 is fixed to the top of the valve body 22; the elastic member 234 is abutted between the guide rod 231 and the valve body 22 to drive the piston 232 to press the second sealing member 233 through elastic force to seal the air vent 24.

[0083] The following combination Figure 4 The working principle of the explosion-proof valve in the embodiment of the utility model is described as follows:

[0084] The explosion-proof valve is a device that controls the pressure and flow of the fluid by changing the spring force of the elastic member 234 and the position of the piston 232. During the use of the battery pack, the temperature of the battery cells in the battery pack changes, causing the air pressure in the battery case to change. When the gas pressure in the battery case 1 rises, the air pressure in the battery case 1 is higher than the air pressure outside the battery case 1. Under the action of the pressure difference, the piston 232 moves upward to open the vent 24, thereby releasing the gas pressure inside the battery case 1. At the same time, the piston 232 drives the guide rod 231 to move upward, and the guide rod 231 compresses the elastic member 234, causing the elastic member 234 to deform and store elastic force. When the gas pressure in the battery case 1 decreases, the pressure difference between the inside and outside of the battery case 1 decreases, and the elastic member 234 releases the stored elastic force, causing the elastic member 234 to recover its deformation, and the elastic force of the elastic member 234 drives the guide rod 231 and the piston 232 to move downward, causing the piston to return to the position of closing the vent 24 to achieve the closure of the explosion-proof valve.

[0085] In this state, the elastic force of the elastic part drives the piston 232 to press the top of the valve body. By setting the second sealing part 233 at the top of the valve body 22, the elastic force can drive the piston 232 to press the second sealing part. The pressing force causes the second sealing part 233 to deform to increase the contact area between the second sealing part 233 and the piston and the valve body, thereby improving the sealing of the piston and the valve body.

[0086] It should be noted that the second seal 233 in the embodiment of the utility model can be made of materials such as rubber and silicone. By setting the second seal 233 to rubber or silicone, it is beneficial to enhance the corrosion resistance, cold resistance and wear resistance of the second seal 233 on the basis of improving the sealing performance.

[0087] The utility model embodiment also provides an explosion-proof valve 2, such as Figure 1-Figure 4As shown, the explosion-proof valve 2 includes a valve body 22 and a valve core assembly 23, wherein the valve body 22 is provided with a through-hole 24; the valve core assembly 23 is movably connected to the valve body 22 to open and close the vent hole 24; wherein the first bottom surface 21 of the valve body 22 is set as a plane, and the first bottom surface 21 is used to fit and contact with the first top surface 11 of the battery box 1 in the battery pack, wherein the first top surface 11 of the battery box 1 is installed with a first sealing member 3, and the first bottom surface 21 presses against the first sealing member 3. The valve core assembly 23 includes a guide rod 231, a piston 232, a second sealing member 233 and an elastic member 234. The guide rod 231 is passed through the valve body 22 to be movably connected to the valve body 22; the piston 232 is connected to the upper end of the guide rod 231; the second sealing member 233 is fixed to the top of the valve body 22; the elastic member 234 is abutted between the guide rod 231 and the valve body 22 to drive the piston 232 to press the second sealing member 233 through elastic force to seal the air vent 24.

[0088] The embodiment of the utility model also provides an electrical device, which includes a battery pack according to any of the above embodiments. The first top surface of the battery case of the battery pack is provided with a through mounting hole, and the first top surface is also provided with a sealing groove, the explosion-proof valve is at least partially installed in the mounting hole, the first sealing member is fixed in the sealing groove, and the first sealing member abuts against the first bottom surface of the explosion-proof valve. The embodiment of the utility model sets the sealing groove on the first top surface of the battery case. Since the structural dimensions of the battery case are larger than the structural dimensions of the explosion-proof valve, the processing difficulty of the sealing groove is reduced, and the risk of the explosion-proof valve breaking due to insufficient processing accuracy of the sealing groove is avoided, the processing steps of the explosion-proof valve are reduced, the structural strength of the explosion-proof valve is improved, and the processing cost and difficulty of the electrical equipment are further reduced.

[0089] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery pack, characterized in that: include: A battery box, wherein a first top surface of the battery box is provided with a through mounting hole, and the first top surface is also provided with a sealing groove; An explosion-proof valve, at least partially mounted in the mounting hole; The first sealing member is fixed in the sealing groove, and the first sealing member abuts against the first bottom surface of the explosion-proof valve.

2. The battery pack according to claim 1, characterized in that: The first bottom surface of the explosion-proof valve is a plane.

3. The battery pack according to claim 1, characterized in that: The first bottom surface of the explosion-proof valve is provided with a protrusion, and the protrusion presses the first sealing member.

4. The battery pack according to claim 1, characterized in that: The sealing groove is arranged around the mounting hole, and the sealing groove overlaps with the orthographic projection of the first bottom surface of the explosion-proof valve.

5. The battery pack according to claim 1, characterized in that: The sealing groove is arranged in a circular ring shape, a square ring shape or an elliptical ring shape.

6. The battery pack according to claim 1, characterized in that: The first sealing member protrudes from a first top surface of the battery box.

7. The battery pack according to claim 6, characterized in that: The first sealing member is configured as a flexible member, and under the compression of the first bottom surface and the first top surface, the first sealing member is deformed to fit the first bottom surface.

8. The battery pack according to claim 1, characterized in that: The first sealing member is interference fit with the sealing groove; Or, the first sealing member is bonded to the sealing groove; Alternatively, the first sealing member is snap-fitted to the sealing groove.

9. An explosion-proof valve, characterized in that: include: The valve body is provided with a penetrating vent hole; A valve core assembly is movably connected to the valve body to open and close the air vent; The first bottom surface of the valve body is set as a plane, and the first bottom surface is used to fit in contact with the first top surface of the battery box in the battery pack, wherein the first top surface of the battery box is installed with a first sealing member, and the first bottom surface presses against the first sealing member; Alternatively, a protrusion is provided on the first bottom surface of the valve body, and the first bottom surface is used to fit in contact with a first top surface of a battery box in the battery pack, wherein a first seal is installed on the first top surface of the battery box, and the protrusion presses against the first seal.

10. The explosion-proof valve according to claim 9, characterized in that: The valve core assembly comprises: A guide rod is passed through the valve body to be movably connected to the valve body; A piston connected to the upper end of the guide rod; a second sealing member fixed to the top of the valve body; The elastic member is in contact between the guide rod and the valve body to drive the piston to press the second sealing member through elastic force to seal the air vent.

11. The explosion-proof valve according to claim 9, characterized in that: The first top surface is also provided with a sealing groove, and the orthographic projection of the first bottom surface of the explosion-proof valve overlaps with the sealing groove.

12. An electrical equipment, characterized in that: include: A battery pack according to any one of claims 1 to 8.

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