Shell integrated anti-explosion valve structure and battery with same

Abstract

The utility model discloses a shell integrated anti-explosion valve structure and a battery with the same, the shell integrated anti-explosion valve structure comprises a shell and an anti-explosion valve, the shell is provided with a wall plate, the anti-explosion valve comprises a valve body and a valve cover, the valve body and the wall plate are integrally formed parts, and the valve cover is arranged on the wall plate. The valve body is provided with a first anti-explosion hole and a second anti-explosion hole which are spaced, and the valve cover is used for opening or closing the first anti-explosion hole and the second anti-explosion hole. According to the shell integrated anti-explosion valve structure provided by the embodiment of the utility model, the valve body is directly processed on the wall plate, so that the assembly process can be reduced, and the assembly cost can be reduced to a certain extent. The two explosion-proof holes, namely the first explosion-proof hole and the second explosion-proof hole which are separated from each other, are formed in the valve body, so that the pressure relief capability of the battery during thermal runaway can be improved, the risk of fire and explosion during thermal runaway of the battery can be well reduced, and the safety of the battery can be well improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic batteries, in particular to a shell-integrated explosion-proof valve structure and a battery with the same. Background Art

[0002] With the rise of new energy vehicles, there are many different designs for battery packs. Factors such as energy density and electric vehicle platform determine different battery pack designs. With the acceleration of industrialization of the power electricity industry, the safety design of battery packs has become a hot topic of current research, and explosion-proof valves have become one of the safety components of battery packs.

[0003] In the related art, the battery pack is separately equipped with two or more explosion-proof valve structures, which is relatively costly. After thermal runaway is triggered, the explosion-proof valves cannot be opened at the same time due to a certain deviation in the bursting pressure, which affects exhaust and pressure relief. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a shell-integrated explosion-proof valve structure, which can reduce assembly costs and has a good pressure relief effect.

[0005] According to the embodiment of the utility model, the shell integrated explosion-proof valve structure includes: a shell, the shell has a wall panel; an explosion-proof valve, the explosion-proof valve includes a valve body and a valve cover, the valve body and the wall panel are an integrally formed part, the valve body has a first explosion-proof hole and a second explosion-proof hole spaced apart, and the valve cover is used to open or close the first explosion-proof hole and the second explosion-proof hole.

[0006] According to the shell-integrated explosion-proof valve structure of the embodiment of the utility model, the valve body is directly processed on the wall plate, so that the valve body and the wall plate have good structural strength, and the sealing between the valve body and the wall plate is good, which can reduce the assembly process and reduce the assembly cost to a certain extent. The valve body is provided with two explosion-proof holes, namely the first explosion-proof hole and the second explosion-proof hole separated from each other, which can improve the pressure relief capacity of the battery when thermal runaway occurs, and can better reduce the risk of fire and explosion of the battery when thermal runaway occurs, thereby better improving the safety of the battery.

[0007] In addition, the shell-integrated explosion-proof valve structure of the utility model may also have the following additional technical features:

[0008] In some embodiments of the utility model, the explosion-proof valve also includes a top plate, a top rod and an elastic member, the valve cover is located on the outside of the wall plate, the top plate is located on the inside of the wall plate, the top rod is connected between the valve cover and the top plate, and the two ends of the elastic member are respectively abutted between the valve body and the top plate, so as to keep the valve cover in a state of closing the first explosion-proof hole and the second explosion-proof hole.

[0009] In some embodiments of the utility model, two push rods are provided, and the two push rods are respectively a first push rod and a second push rod, the first push rod is inserted into the first explosion-proof hole, and the second push rod is inserted into the second explosion-proof hole.

[0010] In some embodiments of the present invention, the elastic member is a spring, and two of the springs are provided. The two springs are respectively sleeved on the first push rod and the second push rod.

[0011] In some embodiments of the present invention, the top plate includes a fire filter.

[0012] In some embodiments of the present invention, the top rod and the top plate are integrally formed.

[0013] In some embodiments of the present invention, the wall panel is a profile with a cavity, and the wall panel has a first plate body and a second plate body in the thickness direction, the first plate body is located on the outside of the second plate body, the valve body is located on the first plate body, and the top plate is located in the cavity.

[0014] In some embodiments of the present invention, the shell-integrated explosion-proof valve structure further includes a sealing member, and the sealing member is sealed between the valve cover and the shell.

[0015] In some embodiments of the present invention, the valve body and the wall panel are integrally formed injection molded parts.

[0016] The utility model also provides a battery with the shell-integrated explosion-proof valve structure of the above embodiment.

[0017] According to the battery of the embodiment of the utility model, the assembly cost can be reduced to a certain extent by providing the shell integrated explosion-proof valve structure of the above embodiment. The valve body is provided with two explosion-proof holes, namely the first explosion-proof hole and the second explosion-proof hole separated from each other, which can improve the pressure relief capacity of the battery when thermal runaway occurs, and can effectively reduce the risk of fire and explosion of the battery when thermal runaway occurs, thereby effectively improving the safety of the battery.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a shell-integrated explosion-proof valve structure according to an embodiment of the utility model.

[0021] Figure 2 It is an exploded view of a shell-integrated explosion-proof valve structure according to an embodiment of the utility model.

[0022] Figure 3 It is a cross-sectional view of a section along the width direction of a shell-integrated explosion-proof valve structure according to an embodiment of the utility model.

[0023] Figure 4 It is a cross-sectional view of a section along the length direction of a shell-integrated explosion-proof valve structure according to an embodiment of the utility model.

[0024] Figure 5 yes Figure 4 Magnified view of area A.

[0025] Reference numerals:

[0026] Shell integrated explosion-proof valve structure 100,

[0027] Wall plate 1, first plate body 11, second plate body 12,

[0028] The explosion-proof valve 2 , the valve body 21 , the first explosion-proof hole 211 , the second explosion-proof hole 212 , the valve cover 22 , the top plate 23 , the first push rod 24 , the second push rod 25 , the elastic member 26 , and the sealing member 3 . DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can 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 present utility model can be understood according to specific circumstances.

[0032] Reference below Figure 1-Figure 5 A shell-integrated explosion-proof valve structure 100 according to an embodiment of the present invention is described.

[0033] like Figure 1-Figure 5 As shown, the shell integrated explosion-proof valve structure 100 according to the embodiment of the utility model includes a shell and an explosion-proof valve 2, the shell has a wall panel 1, illustratively, the shell is a rectangular shell, the wall panel 1 can be the upper wall panel 1, the lower wall panel 1, etc. of the shell, and the present application does not make any limitation.

[0034] The explosion-proof valve 2 includes a valve body 21 and a valve cover 22. The valve body 21 and the wall plate 1 are integrally formed. The valve body 21 has a first explosion-proof hole 211 and a second explosion-proof hole 212 that are spaced apart. The valve cover 22 is used to open or close the first explosion-proof hole 211 and the second explosion-proof hole 212. That is, when the wall plate 1 is processed, the valve body 21 is directly processed on the wall plate 1, so that the valve body 21 and the wall plate 1 have good structural strength, and the sealing between the valve body 21 and the wall plate 1 is good, which can reduce the assembly process and reduce the assembly cost to a certain extent.

[0035] Furthermore, two explosion-proof holes are provided on the valve body 21, namely a first explosion-proof hole 211 and a second explosion-proof hole 212 which are spaced apart from each other, which can improve the pressure relief capacity of the battery when thermal runaway occurs, and can effectively reduce the risk of fire and explosion of the battery when thermal runaway occurs, thereby effectively improving the safety of the battery.

[0036] Therefore, according to the shell integrated explosion-proof valve structure 100 of the embodiment of the utility model, the valve body 21 is directly processed on the wall plate 1, so that the valve body 21 and the wall plate 1 have good structural strength, and the sealing between the valve body 21 and the wall plate 1 is good, which can reduce the assembly process and reduce the assembly cost to a certain extent. The valve body 21 is provided with two explosion-proof holes, namely the first explosion-proof hole 211 and the second explosion-proof hole 212 separated from each other, which can improve the pressure relief capacity of the battery when thermal runaway occurs, and can better reduce the risk of fire and explosion of the battery when thermal runaway occurs, thereby better improving the safety of the battery.

[0037] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the explosion-proof valve 2 also includes a top plate 23, a top rod and an elastic member 6. The valve cover 22 is located on the outer side of the wall plate 1, and the top plate 23 is located on the inner side of the wall plate 1. The top rod is connected between the valve cover 22 and the top plate 23. The two ends of the elastic member 6 are respectively abutted between the valve body 21 and the top plate 23, so as to keep the valve cover 22 in a state of closing the first explosion-proof hole 211 and the second explosion-proof hole 212. Therefore, when thermal runaway occurs in the shell, the high-temperature and high-pressure gas in the shell can impact the top plate 23 and the valve cover 22. At this time, the elastic force of the spring can be overcome under the action of the gas pressure to deform the spring, so that the valve cover 22 opens the first explosion-proof hole 211 and the second explosion-proof hole 212, and the high-temperature and high-pressure gas can be better discharged from the first explosion-proof hole 211 and the second explosion-proof hole 212. After the high-temperature and high-pressure gas in the shell is discharged, the spring can restore its deformation, so that the valve cover 22 closes the first explosion-proof hole 211 and the second explosion-proof hole 212 again. In this way, since the valve cover 22 is opened by the gas pressure and closed by the elastic member 6, it is not easy for external gas to enter the shell from the outside, which can better reduce the water vapor carried by the external gas into the shell, and can better improve the waterproof performance of the explosion-proof valve 2.

[0038] In some embodiments of the present invention, Figure 1-Figure 5As shown, two push rods are provided, namely a first push rod 24 and a second push rod 25. The first push rod 24 is inserted into the first explosion-proof hole 211, and the second push rod 25 is inserted into the second explosion-proof hole 212. Therefore, through the cooperation between the first push rod 24 and the first explosion-proof hole 211, and the cooperation between the second push rod 25 and the second explosion-proof hole 212, the valve cover 22 can be better guided when being opened, so that the valve cover 22 can be opened evenly. In this way, the high-temperature and high-pressure gases discharged from the first explosion-proof hole 211 and the second explosion-proof hole 212 are more uniform and stable.

[0039] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the elastic member 6 is a spring, and two springs are provided. The two springs are respectively sleeved on the first push rod 24 and the second push rod 25. Therefore, when the spring is deformed, it can be deformed along the first push rod 24 or the second push rod 25, and the deformation direction is stable. Moreover, when the spring recovers the deformation, the first push rod 24 or the second push rod 25 can also be better guided, so that the elastic force of the spring is relatively stable, so that the valve cover 22 can better close the first explosion-proof hole 211 and the second explosion-proof hole 212.

[0040] Optionally, the top plate 23 includes a fire filter. After the thermal runaway is triggered, the pressure in the housing increases, and the pressure acts on the fire filter, thereby improving the thermal runaway safety of the battery pack.

[0041] In some embodiments of the present invention, the top rod and the top plate 23 are integrally formed, thereby improving the connection strength between the top rod and the top plate 23.

[0042] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the wall plate 1 is a profile with a cavity, and the wall plate 1 has a first plate body 11 and a second plate body 12 in the thickness direction, the first plate body 11 is located outside the second plate body 12, the valve body 21 is located on the first plate body 11, and the top plate 23 is located in the cavity. Therefore, when thermal runaway occurs in the shell, high-temperature and high-pressure gas can enter the cavity, thereby better pressing on the explosion-proof valve 2 through gas pressure, so that the valve cover 22 is opened.

[0043] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the shell-integrated explosion-proof valve structure 100 further includes a sealing member 3, and the sealing member 3 is sealed between the valve cover 22 and the shell. Thus, the sealing performance between the valve cover 22 and the shell can be improved.

[0044] In some embodiments of the present invention, the valve body 21 and the wall plate 1 are integrally formed injection molded parts, which have a simple structure and low production cost.

[0045] The utility model also provides a battery having the shell-integrated explosion-proof valve structure 100 of the above embodiment.

[0046] According to the battery of the embodiment of the utility model, the assembly cost can be reduced to a certain extent by providing the shell integrated explosion-proof valve structure 100 of the above embodiment. The valve body 21 is provided with two explosion-proof holes, namely the first explosion-proof hole 211 and the second explosion-proof hole 212 which are separated from each other, which can improve the pressure relief capacity of the battery when thermal runaway occurs, and can effectively reduce the risk of fire and explosion of the battery when thermal runaway occurs, thereby effectively improving the safety of the battery.

[0047] Other structures and operations of the battery and housing integrated explosion-proof valve structure 100 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0048] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A shell-integrated explosion-proof valve structure, characterized in that: include: a housing having a wall panel; An explosion-proof valve comprises a valve body and a valve cover, wherein the valve body and the wall plate are integrally formed, the valve body is provided with a first explosion-proof hole and a second explosion-proof hole spaced apart, and the valve cover is used to open or close the first explosion-proof hole and the second explosion-proof hole.

2. The shell-integrated explosion-proof valve structure according to claim 1, characterized in that: The explosion-proof valve also includes a top plate, a top rod and an elastic member. The valve cover is located on the outer side of the wall plate, the top plate is located on the inner side of the wall plate, the top rod is connected between the valve cover and the top plate, and both ends of the elastic member are respectively abutted between the valve body and the top plate, so as to keep the valve cover in a state of closing the first explosion-proof hole and the second explosion-proof hole.

3. The shell-integrated explosion-proof valve structure according to claim 2, characterized in that: The two push rods are provided with a first push rod and a second push rod respectively. The first push rod is inserted into the first explosion-proof hole, and the second push rod is inserted into the second explosion-proof hole.

4. The shell-integrated explosion-proof valve structure according to claim 3, characterized in that: The elastic member is a spring, two of which are provided, and the two springs are respectively sleeved on the first push rod and the second push rod.

5. The shell-integrated explosion-proof valve structure according to claim 2, characterized in that: The top plate includes a fire filter.

6. The shell-integrated explosion-proof valve structure according to claim 2, characterized in that: The top rod and the top plate are an integrally formed part.

7. The shell-integrated explosion-proof valve structure according to claim 2, characterized in that: The wall plate is a profile with a cavity, and has a first plate body and a second plate body in the thickness direction, the first plate body is located on the outside of the second plate body, the valve body is located on the first plate body, and the top plate is located in the cavity.

8. The shell-integrated explosion-proof valve structure according to claim 1, characterized in that: Also included is a seal that seals between the valve cover and the housing.

9. The shell-integrated explosion-proof valve structure according to claim 1, characterized in that: The valve body and the wall plate are integrally formed injection molded parts.

10. A battery, characterized in that: A shell-integrated explosion-proof valve structure comprising any one of claims 1-9.

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