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

Abstract

The embodiment of the utility model relates to a battery pack anti-explosion valve, a battery pack and an electric device. The battery pack anti-explosion valve comprises an anti-explosion valve body and a protective cover, the protective cover is detachably connected to the periphery of the anti-explosion valve body, the protective cover comprises a peripheral protective cover and an end protective cover, the peripheral protective cover is arranged on the periphery of the anti-explosion valve body in a surrounding mode, and a first opening end and a second opening end which are oppositely arranged are formed in the peripheral protective cover; the first opening end is provided with a connecting part, and the anti-explosion valve body abuts against the connecting part. The end protection piece covers the second opening end and is connected with the peripheral protection piece through a first fastening piece. According to the battery explosion-proof valve provided by the embodiment of the invention, the maintenance and cleaning convenience of the protective cover can be improved, and the protective cover can be suitable for explosion-proof valve bodies of different models and manufacturers; meanwhile, the protective cover can play a role in protecting the anti-explosion valve body, and the situation that water enters the whole bag and even the insulation of the whole bag fails due to the fact that the anti-explosion valve body is burst open by water flow can be greatly reduced.

Description

Technical Field

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

[0002] As electric vehicles become increasingly popular, their driving conditions are increasing. For electric vehicles that frequently wade through water, the sealing performance of the battery pack is particularly important. When high-speed electric vehicles pass through water, there is a risk that the explosion-proof valve will be opened by the water flow, causing water to enter the battery pack and even causing insulation failure. Utility Model Content

[0003] In view of this, embodiments of the present application provide a battery pack explosion-proof valve, a battery pack, and an electrical device to solve at least one problem existing in the background technology.

[0004] In a first aspect, an embodiment of the present application provides a battery pack explosion-proof valve, comprising:

[0005] Explosion-proof valve body;

[0006] A protective cover, detachably connected to the outer periphery of the explosion-proof valve body;

[0007] Wherein, the protective cover comprises:

[0008] a peripheral protection member disposed around the periphery of the explosion-proof valve body, the peripheral protection member being provided with a first opening end and a second opening end opposite to each other, the first opening end being provided with a connecting portion, the explosion-proof valve body being in contact with the connecting portion;

[0009] The end protection piece is covered at the second open end and is connected to the peripheral protection piece through a first fastener.

[0010] In conjunction with the first aspect of the present application, in an optional embodiment, the connecting portion is a snap-fit protrusion extending from the first open end of the peripheral protective member toward the center thereof;

[0011] The explosion-proof valve body is provided with a clamping groove used in conjunction with the clamping protrusion.

[0012] In combination with the first aspect of the present application, in an optional embodiment, the peripheral protective member includes a first protective member, a second protective member and a second fastener, the first protective member is provided with a first lifting ear at both ends, the first lifting ear has a first mounting hole, the second protective member is provided with a second lifting ear at both ends, the second lifting ear has a second mounting hole, the first mounting hole and the second mounting hole are positioned opposite to each other, and the second fastener is inserted into the first mounting hole and the second mounting hole to connect the first protective member and the second protective member.

[0013] In conjunction with the first aspect of the present application, in an optional embodiment, a plurality of third lugs are protruding from the edge of the peripheral protective member, the plurality of third lugs are circumferentially distributed around the axis of the peripheral protective member, and the third lugs have third mounting holes;

[0014] The edge of the end guard is provided with a plurality of fourth ears corresponding to the third ears, the plurality of fourth ears are circumferentially distributed around the axis of the end guard, the axis of the end guard is collinear with the axis of the peripheral guard, the fourth ears have a fourth mounting hole, and the fourth mounting hole is opposite to the third mounting hole;

[0015] The first fastener is inserted into the third mounting hole and the fourth mounting hole, so that the peripheral protection member is connected to the end protection member.

[0016] In combination with the first aspect of the present application, in an optional embodiment, the end protective member is arranged toward one side of the top cover of the explosion-proof valve body, and a plurality of first through holes are provided on the end protective member so that the thermal runaway gas discharged from the explosion-proof valve body is discharged from the plurality of first through holes.

[0017] In combination with the first aspect of the present application, in an optional embodiment, the cross-sections of the explosion-proof valve body and the first through hole are both circular, the ratio of the radius of the first through hole to the radius of the explosion-proof valve body is greater than or equal to 1 / 10; and the ratio of the number of the first through holes to the diameter of the explosion-proof valve body is greater than or equal to 1 / 2.

[0018] In conjunction with the first aspect of the present application, in an optional embodiment, there is a first distance between the explosion-proof valve body and the end protection piece;

[0019] The distance that the top cover of the explosion-proof valve body is displaced under the action of the thermal runaway gas is a second distance, and the ratio of the first distance to the second distance is greater than or equal to 3 / 2.

[0020] In a second aspect, an embodiment of the present application provides a battery pack, comprising a battery pack explosion-proof valve according to any embodiment of the first aspect.

[0021] In a third aspect, an embodiment of the present application further provides an electrical device comprising the battery pack according to the second aspect.

[0022] The battery pack explosion-proof valve provided in the embodiment of the present application utilizes a protective cover that is detachably connected to the explosion-proof valve body, which not only improves the convenience of maintenance and cleaning of the protective cover, but also makes the protective cover applicable to explosion-proof valve bodies of different models and manufacturers; at the same time, the protective cover can protect the explosion-proof valve body, which can greatly reduce the possibility of the explosion-proof valve body being washed open by water flow, causing water to enter the entire pack or even the insulation of the entire pack to fail.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 A schematic diagram of the overall three-dimensional structure of a battery pack explosion-proof valve provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the three-dimensional structure of the protective cover in the battery pack explosion-proof valve provided in an embodiment of the present application;

[0027] Figure 3 A schematic exploded perspective view of a protective cover in a battery pack explosion-proof valve according to an embodiment of the present application;

[0028] Figure 4 A schematic cross-sectional view of a battery pack explosion-proof valve in a first state according to an embodiment of the present application;

[0029] Figure 5 A schematic cross-sectional view of the second state of the battery pack explosion-proof valve provided in an embodiment of the present application.

[0030] Reference numerals:

[0031] 10. Explosion-proof valve body; 110. Top cover; 120. Snap-fit groove;

[0032] 20, protective cover; 210, peripheral protective member; 21a, connecting portion; 21a1, snap-fit protrusion; 21b, first open end; 21c, second open end; 211, first protective member; 2111, first lifting ear; 2112, first mounting hole; 212, second protective member; 2121, second lifting ear; 2122, second mounting hole; 213, third lifting ear; 2131, third mounting hole;

[0033] 220, end protection piece; 221, fourth lifting ear; 2211, fourth mounting hole; 222, first through hole;

[0034] L1, first distance; L2, second distance. DETAILED DESCRIPTION

[0035] The exemplary embodiments disclosed herein will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the specific embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0036] In the following description, numerous specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present application; that is, all features of actual embodiments are not described herein, nor are well-known functions and structures described in detail.

[0037] In the drawings, the sizes of layers, regions, elements and their relative sizes may be exaggerated for clarity. Like reference numerals denote like elements throughout.

[0038] It should be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" another element or layer, it may be directly on, adjacent to, connected to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are merely used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present application, the first element, component, region, layer, or part discussed below may be represented as a second element, component, region, layer, or part. And when the second element, component, region, layer, or part is discussed, it does not necessarily mean that the first element, component, region, layer, or part is present in the present application.

[0039] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein for convenience of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that in addition to the orientations shown in the figures, the spatially relative terms are intended to include different orientations of the device in use and operation. For example, if the device in the drawings is flipped, then the elements or features described as "under the other elements" or "under it" or "under it" will be oriented as "on" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0040] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present application. When used herein, the singular forms "a", "an", and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0041] In order to fully understand the present application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods.

[0042] like Figures 1 to 5 As shown, an embodiment of the present application provides a battery pack explosion-proof valve, which includes an explosion-proof valve body 10 and a protective cover 20. The protective cover 20 is detachably connected to the outer periphery of the explosion-proof valve body 10. The protective cover 20 includes a peripheral protective member 210 and an end protective member 220. The peripheral protective member 210 is arranged around the periphery of the explosion-proof valve body 10. The peripheral protective member 210 has a first open end 21b and a second open end 21c that are oppositely arranged. The first open end 21b is provided with a connecting portion 21a. The peripheral protective member 210 is connected to the explosion-proof valve body 10 via the connecting portion 21a, so that the explosion-proof valve body 10 abuts the connecting portion 21a. The end protective member 220 covers the second open end 21c and is connected to the peripheral protective member 210 by a first fastener (not shown in the figure). As an example, the first fastener is a bolt, of course, it is not limited to this.

[0043] In the above battery pack explosion-proof valve, the peripheral protective member 210 and the end protective member 220 are detachably connected, and the peripheral protective member 210 and the explosion-proof valve body 10 are also detachably connected, thereby improving the convenience of maintenance and cleaning of the protective cover 20, and the protective cover 20 can be applied to explosion-proof valve bodies 10 of different models and manufacturers; at the same time, the protective cover 20 can protect the explosion-proof valve body 10, and can greatly reduce the occurrence of the explosion-proof valve body 10 being washed open by water flow, resulting in water entering the entire pack or even insulation failure of the entire pack.

[0044] In an alternative embodiment, if Figure 3 and Figure 4 As shown, the connecting portion 21a is a clamping protrusion 21a1 extending from the first open end 21b of the peripheral protection member 210 toward the center thereof, and the explosion-proof valve body 10 is provided with a clamping groove 120 used in conjunction with the clamping protrusion 21a1.

[0045] Preferably, the peripheral protection member 210 is bent to form the snap-fit protrusion 21 a 1 , thereby ensuring the structural strength of the peripheral protection member 210 and further ensuring the secure connection between the peripheral protection member 210 and the explosion-proof valve body 10 .

[0046] In an alternative embodiment, if Figure 3 As shown, the peripheral protection member 210 includes a first protection member 211, a second protection member 212, and a second fastener (not shown). First lugs 2111 are protruding from both ends of the first protection member 211. The first lugs 2111 have first mounting holes 2112. Second lugs 2121 are protruding from both ends of the second protection member 212. The second lugs 2121 have second mounting holes 2122. The first mounting holes 2112 and the second mounting holes 2122 are positioned opposite each other. The second fastener is inserted into the first mounting holes 2112 and the second mounting holes 2122 to connect the first protection member 211 and the second protection member 212. By way of example, the second fastener is a bolt, but this is not limited to this.

[0047] The first guard 211 and the second guard 212 are detachably connected via a second fastener, which can improve the convenience of disassembly and assembly of the protective cover 20 and the explosion-proof valve body 10; in addition, the protective cover 20 can be adapted to different models of explosion-proof valve bodies 10 by adjusting the second fastener.

[0048] When the first and second guard members 211, 212 are connected to the explosion-proof valve body 10 using the second fastener, an assembly gap is provided between the first and second guard members 211, 212. For example, the assembly gap is 2 mm, but can also be 1 mm, 3 mm, etc., depending on specific needs and is not limited in this embodiment of the present application. The assembly gap provided between the first and second guard members 211, 212 ensures a secure and reliable connection between the first and second guard members 211, 212 and the explosion-proof valve body 10.

[0049] In an alternative embodiment, if Figure 3 As shown, a plurality of third lugs 213 are projected from the edge of the peripheral guard 210. These lugs 213 are circumferentially distributed around the axis of the peripheral guard 210 and have third mounting holes 2131. A plurality of fourth lugs 221 are projected from the edge of the end guard 220, corresponding to the third lugs 213. These lugs 221 are circumferentially distributed around the axis of the end guard 220, with the axis of the end guard 220 being collinear with the axis of the peripheral guard 210. Each lug 221 has a fourth mounting hole 2211, which is positioned opposite the third mounting hole 2131. A first fastener is inserted into the third mounting hole 2131 and the fourth mounting hole 2211, thereby connecting the peripheral guard 210 to the end guard 220.

[0050] In an optional embodiment, the end guard 220 is disposed toward one side of the top cover 110 of the explosion-proof valve body 10, and a plurality of first through holes 222 are formed through the end guard 220, so that the thermal runaway gas discharged from the explosion-proof valve body 10 can be discharged from the first through holes 222. The end guard 220 is disposed opposite to the top cover 110 of the explosion-proof valve body 10, so that the thermal runaway gas discharged from the explosion-proof valve body 10 can be discharged along the Figure 4 The air flows toward the end protection member 220 in the direction of the arrow s shown in FIG. 2 and is discharged from the first through hole 222 . The protection cover 20 not only protects the explosion-proof valve body 10 , but also does not affect the normal exhaust of the explosion-proof valve body 10 .

[0051] In an alternative embodiment, the cross-sections of the explosion-proof valve body 10 and the first through-hole 222 are both circular, the ratio of the radius of the first through-hole 222 to the radius of the explosion-proof valve body 10 is greater than or equal to 1 / 10, and the ratio of the number of first through-holes 222 to the diameter of the explosion-proof valve body 10 is greater than or equal to 1 / 2. This ensures that when the explosion-proof valve body 10 discharges thermal runaway gases, the gases can be smoothly discharged from the first through-hole 222 of the end shield 220, preventing the accumulation of thermal runaway gases within the protective cover 20 and causing safety issues.

[0052] In an optional embodiment, there is a first distance L1 between the explosion-proof valve body 10 and the end protective member 220, the distance that the top cover 110 of the explosion-proof valve body 10 is displaced under the action of thermal runaway gas is a second distance L2, and the ratio of the first distance L1 to the second distance L2 is greater than or equal to 3 / 2.

[0053] Figure 4 Schematic diagram showing the positional relationship between the top cover 110 of the explosion-proof valve body 10 and the end protection piece 220 when the top cover 110 has not been displaced. Figure 5The diagram shows the positional relationship between the top cover 110 of the explosion-proof valve body 10 and the end guard 220 after the top cover 110 is displaced the second distance L2 by the action of thermal runaway gas. When the ratio of the first distance L1 to the second distance L2 is less than 3 / 2, the distance between the top cover 110 of the explosion-proof valve body 10 and the end guard 220 is too small after the top cover 110 is displaced the second distance L2 by the action of thermal runaway gas, significantly affecting the smooth discharge of thermal runaway gas.

[0054] The steps for installing the battery pack explosion-proof valve provided in the embodiment of the present application include:

[0055] Place the first and second guard pieces 211 and 212 on the explosion-proof valve body 10, aligning the engaging protrusions 21a1 with the engaging grooves 120. Use the second fastener to secure the first and second guard pieces 211 and 212, ensuring that the engaging protrusions 21a1 abut against the engaging grooves 120. Fasten the end guard piece 220 to the peripheral guard piece 210 using the first fastener, completing the connection between the protective cover 20 and the explosion-proof valve body 10. To remove the protective cover 20, first remove the end guard piece 220 and then the peripheral guard piece 210.

[0056] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations of the claims. Various modifications and variations may be made to the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form additional embodiments of the present application that may not be explicitly described. Therefore, the above embodiments merely illustrate several implementations of the present application and do not limit the scope of protection of the patent application.

Claims

1. A battery pack explosion-proof valve, characterized in that: include: Explosion-proof valve body (10); A protective cover (20) detachably connected to the outer periphery of the explosion-proof valve body (10); Wherein, the protective cover (20) comprises: A peripheral protection member (210) is provided around the periphery of the explosion-proof valve body (10), the peripheral protection member (210) is provided with a first opening end (21b) and a second opening end (21c) that are arranged opposite to each other, the first opening end (21b) is provided with a connecting portion (21a), and the explosion-proof valve body (10) abuts against the connecting portion (21a); An end protection member (220) is provided to cover the second open end (21c) and is connected to the peripheral protection member (210) via a first fastener.

2. The battery pack explosion-proof valve according to claim 1, characterized in that: The connecting portion (21a) is a clamping protrusion (21a1) extending from the first opening end (21b) of the peripheral protection member (210) toward the center thereof; The explosion-proof valve body (10) is provided with a clamping groove (120) used in conjunction with the clamping protrusion (21a1).

3. The battery pack explosion-proof valve according to claim 1 or 2, characterized in that: The peripheral protective member (210) comprises a first protective member (211), a second protective member (212) and a second fastener, wherein first ears (2111) are protrudingly provided at both ends of the first protective member (211), and the first ears (2111) have a first mounting hole (2112), and second ears (2121) are protrudingly provided at both ends of the second protective member (212), and the second ears (2121) have a second mounting hole (2122), and the first mounting hole (2112) and the second mounting hole (2122) are positioned opposite to each other, and the second fastener is inserted into the first mounting hole (2112) and the second mounting hole (2122) so that the first protective member (211) and the second protective member (212) are connected.

4. The battery pack explosion-proof valve according to claim 1, characterized in that: A plurality of third hanging ears (213) are protruding from the edge of the peripheral protection piece (210), the plurality of third hanging ears (213) are circumferentially distributed around the axis of the peripheral protection piece (210), and the third hanging ears (213) have third mounting holes (2131); The edge of the end protection piece (220) is provided with a plurality of fourth lifting ears (221) corresponding to the third lifting ears (213), the plurality of fourth lifting ears (221) are circumferentially distributed around the axis of the end protection piece (220), the axis of the end protection piece (220) is collinear with the axis of the peripheral protection piece (210), the fourth lifting ear (221) has a fourth mounting hole (2211), and the fourth mounting hole (2211) is positioned opposite to the third mounting hole (2131); The first fastener is inserted into the third mounting hole (2131) and the fourth mounting hole (2211) so that the peripheral protection member (210) is connected to the end protection member (220).

5. The battery pack explosion-proof valve according to claim 1, characterized in that: The end protection piece (220) is arranged toward one side of the top cover (110) of the explosion-proof valve body (10), and a plurality of first through holes (222) are formed on the end protection piece (220), so that the thermal runaway gas discharged from the explosion-proof valve body (10) is discharged from the plurality of first through holes (222).

6. The battery pack explosion-proof valve according to claim 5, characterized in that: The cross-sections of the explosion-proof valve body (10) and the first through hole (222) are both circular, the ratio of the radius of the first through hole (222) to the radius of the explosion-proof valve body (10) is greater than or equal to 1 / 10; and the ratio of the number of the first through holes (222) to the diameter of the explosion-proof valve body (10) is greater than or equal to 1 / 2.

7. The battery pack explosion-proof valve according to claim 1, characterized in that: There is a first distance (L1) between the explosion-proof valve body (10) and the end protection piece (220); The top cover (110) of the explosion-proof valve body (10) is displaced by a second distance (L2) under the action of thermal runaway gas, and the ratio of the first distance (L1) to the second distance (L2) is greater than or equal to 3 / 2.

8. A battery pack, characterized in that: Comprising a battery pack explosion-proof valve as described in any one of claims 1 to 7.

9. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 8.

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