CN220368086U - Battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and in particular, to a battery device, where the battery device includes a case and a battery, and the case has a bottom plate; the battery is arranged on the bottom plate, the battery comprises a shell, a battery core and an explosion-proof valve, the battery core is arranged in the shell, the shell is provided with two opposite end faces and a plurality of side faces located between the two end faces, the side faces comprise a first side face opposite to the bottom plate and a second side face intersecting the first side face, an explosion-proof through hole is formed in the second side face, and the explosion-proof valve is arranged in the explosion-proof through hole. The explosion-proof valve is arranged on the second side face of the battery, so that the explosion-proof valve is released to the side face after being opened, the heat exchange plate at the bottom or the top of the battery is prevented from being damaged after the battery is in thermal runaway, the heat exchange plate is protected, and high-temperature high-pressure liquid and gas in the battery can be discharged from the side portion of the box body rapidly through the side face release, so that the thermal spread of the battery is reduced.

Description

Battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery device.

Background

Battery devices are often provided in electric vehicles for powering the electric vehicles. The battery device comprises a box body and a battery, and the battery is arranged in the box body. In the use process of the battery device, the battery is likely to generate thermal runaway, in order to release pressure of the battery when the battery is in thermal runaway, an explosion-proof valve is arranged on the battery, and high-temperature and high-pressure gas in the battery easily spreads to devices such as a heat exchange plate after the battery is in thermal runaway, so that the devices such as the heat exchange plate are damaged.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

It is an object of the present disclosure to provide a battery device, which in turn protects the battery device at least to some extent in case of thermal runaway of the battery.

The present disclosure provides a battery device including:

the box body is provided with a bottom plate;

the battery, the battery is located the bottom plate, the battery includes casing, electric core and explosion-proof valve, the electric core is located in the casing, the casing has two terminal surfaces that set up relatively and a plurality of sides that are located between two terminal surfaces, a plurality of the side include with the first side that the bottom plate set up relatively and with the crossing second side of first side, be provided with explosion-proof through-hole on the second side, explosion-proof valve is located explosion-proof through-hole.

The battery device provided by the embodiment of the disclosure comprises a box body and a battery, wherein the box body is provided with a bottom plate, the battery is arranged on the bottom plate, the battery comprises a shell, a battery core and an explosion-proof valve, the battery core is arranged in the shell, the shell is provided with two opposite end faces and a plurality of side faces located between the two end faces, the plurality of side faces comprise a first side face which is opposite to the bottom plate and a second side face which is intersected with the first side face, the explosion-proof valve is arranged on the second side face and is provided with an explosion-proof through hole, the explosion-proof valve is arranged on the second side face of the battery, so that the explosion-proof valve is opened to the side face for pressure relief, a heat exchange plate at the bottom or the top of the battery is prevented from being damaged after thermal runaway, the heat exchange plate is protected, and high-temperature high-pressure liquid and gas in the battery can be rapidly discharged from the side face of the box, and the thermal spread of the battery is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic structural view of a battery device according to an exemplary embodiment of the present disclosure;

fig. 2 is a schematic structural view of a battery according to an exemplary embodiment of the present disclosure;

fig. 3 is a schematic view of another battery according to an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural view of a case body according to an exemplary embodiment of the present disclosure;

fig. 5 is a schematic structural view of an explosion-proof valve according to an exemplary embodiment of the present disclosure.

Tag name

10. A case; 11. a bottom plate; 12. a frame; 20. a battery; 201. an end face; 202. a first side; 203. a second side; 204. a connection part; 205. an explosion-proof section; 21. a housing; 211. a case main body; 212. a cover plate; 22. an explosion-proof valve; 221. a first explosion-proof valve; 222. a second explosion-proof valve; 23. a battery cell; 24. a recessed portion; 25. a pole.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The exemplary embodiments of the present disclosure provide a battery device, as shown in fig. 1, 2 and 3, including a case 10 and a battery 20, the case 10 having a bottom plate 11; the battery 20 is arranged on the bottom plate 11, the battery comprises a shell 21, a battery core 23 and an explosion-proof valve 22, the battery core 23 is arranged in the shell 21, the shell 21 is provided with two oppositely arranged end faces 201 and a plurality of side faces located between the two end faces 201, the plurality of side faces comprise a first side face 202 oppositely arranged with the bottom plate 11 and a second side face 203 intersected with the first side face 202, an explosion-proof through hole is formed in the second side face 203, and the explosion-proof valve 22 is arranged in the explosion-proof through hole.

The battery device provided by the embodiment of the disclosure includes a case 10 and a battery 20, the case 10 has a bottom plate 11, the battery 20 is arranged on the bottom plate 11, the battery includes a housing 21, a battery core 23 and an explosion-proof valve 22, the battery core 23 is arranged in the housing 21, the housing 21 has two oppositely arranged end faces 201 and a plurality of side faces located between the two end faces 201, the plurality of side faces include a first side face 202 oppositely arranged with the bottom plate 11 and a second side face 203 intersecting the first side face 202, an explosion-proof through hole is arranged on the second side face 203, the explosion-proof valve 22 is arranged on the explosion-proof through hole, the explosion-proof valve 22 is arranged on the second side face 203 of the battery 20, so that the explosion-proof valve 22 is released to the side face to release pressure after the explosion-proof valve 22 is opened, a heat exchange plate at the bottom or the top of the battery 20 is prevented from being damaged, the heat exchange plate is protected, and high-temperature and high-pressure liquid and gas in the battery 20 can be discharged from the side of the case 10 rapidly through the side face pressure release from the side face to reduce the heat spread of the battery 20.

The following will describe each part of the battery device provided in the embodiments of the present disclosure in detail:

the case 10 is used to form the outer contour of the battery device and protect the battery 20 and the like in the case 10. The case 10 may include a base plate 11 and a frame 12, the frame 12 and the base plate 11 being connected to form one or more battery compartments in which the batteries 20 are disposed.

The base plate 11 has a flat plate or a nearly flat plate structure to support the battery 20 provided on the base plate 11. The floor 11 may be a solid floor 11 or a cavity may be provided in the floor 11 which may serve as an exhaust or collision buffer etc. Or in some embodiments the bottom plate 11 may also be shared with the heat exchanger plate.

The frame 12 may include a plurality of structural beams that are connected in sequence to form one or more receiving frames that together with the base plate 11 form a battery compartment. The box 10 may be a rectangular or approximately rectangular structure, and the plurality of structural beams includes a first side beam, a second side beam, a third side beam, a fourth side beam, a first middle beam, and a second middle beam, where the first side beam, the second side beam, the third side beam, and the fourth side beam are sequentially connected to form a rectangular frame, the first middle beam and the second middle beam are disposed in the frame, and the first middle beam and the second middle beam are vertically disposed to divide a space in the frame into four battery compartments.

Further, the case 10 provided in the embodiment of the present disclosure may further include a reinforcing plate disposed on the bottom plate 11, and protruding from the surface of the bottom plate 11 supporting the battery 20, the reinforcing plate being used to enhance the strength of the case 10. In some embodiments, the stiffening plate may be served by a structural beam of the tank 10.

A plurality of batteries 20 may be disposed in the battery compartment, and the plurality of batteries 20 may be sequentially arranged to form a battery pack. When the case 10 has a plurality of battery compartments, one battery pack may be provided in each battery compartment. The number of cells 20 in each of the plurality of battery packs may be the same or different.

The battery comprises a shell 21, a battery core 23 and an explosion-proof valve 22, wherein a containing cavity is arranged in the shell 21, and the battery core 23 is arranged in the containing cavity of the shell 21. The housing 21 has two opposite end surfaces 201 and a plurality of side surfaces located between the two end surfaces 201, the plurality of side surfaces includes a first side surface 202 opposite to the bottom plate 11 and a second side surface 203 intersecting the first side surface 202, an explosion-proof through hole communicating with the accommodating chamber is provided in the second side surface 203, and the explosion-proof valve 22 is provided in the explosion-proof through hole.

By way of example, the battery 20 provided by embodiments of the present disclosure may have a rectangular or nearly rectangular configuration. The housing 21 includes two oppositely disposed end faces 201 and four side faces located between the two end faces 201, the area of the end faces 201 being larger than the area of the side faces. A plurality of cells 20 are arranged in sequence in the cell compartment, and end faces 201 of two adjacent cells 20 in the cell compartment are disposed opposite each other. When the battery 20 is placed in the case 10, the end face 201 is perpendicular to the bottom plate 11, the first side face 202 is parallel to the bottom plate 11, and the second side face 203 is perpendicular to the bottom plate 11.

The housing 21 serves to form the outer contour of the battery 20 and to protect the devices within the housing 21. The case 21 may include a case main body 211 and a cover plate 212, a surface of the cover plate 212 forming one end face 201 of the case 21, and an opposite surface of the case main body 211 and the cover plate 212 forming the other end face 201.

The cover plate 212 and the case main body 211 are welded to form a closed accommodating cavity. For example, the cover plate 212 and the case main body 211 may be connected by welding. In order to facilitate the connection between the cover plate 212 and the case main body 211, flanges protruding from the side surface of the case 21 may be provided on the cover plate 212 and/or the case main body 211, and the flanges may be welded during welding, so that the welding is facilitated, and the high temperature damage to the battery cell 23 during the welding can be avoided. Of course, in practical applications, the cover plate 212 and the housing main body 211 may not be provided with flanges, which is not limited to the embodiment of the disclosure.

In a possible embodiment, the cover plate 212 may be a flat plate structure, and the case body 211 is provided with receiving recesses. The shell body 211 may include an end panel and a surrounding frame, where the end panel and the cover plate 212 are disposed opposite to each other, the surrounding frame is disposed on one side of the end panel facing the cover plate 212, the surrounding frame and the end panel are connected to form a containing pit, and the cover plate 212 is covered on one side of the surrounding frame far from the end panel to form a sealed containing cavity. The surrounding frame forms a plurality of side plates of the shell 21, and the surfaces of the side plates are side surfaces.

When a flange is provided around the housing 21, the housing main body 211 may further include a flange provided on a side of the enclosure frame away from the end plate, and the flange extends to the outside of the enclosure frame. The flange and the edge of the cover 212 are welded to form a flange on the housing 21.

In another possible embodiment, the cover plate 212 and the case body 211 may be provided with receiving recesses, and when the cover plate 212 and the case body 211 are buckled, the receiving recesses together form a receiving cavity of the case 21.

The cover plate 212 includes a first end plate and a first enclosure frame disposed on a surface of the first end plate facing the case main body 211. The case main body 211 includes a second end plate and a second enclosure frame, the second enclosure frame is disposed on a surface of the second end plate facing the cover plate 212, and the first enclosure frame and the second enclosure frame are welded to form a sealed accommodating cavity. The first and second enclosing frames form side plates, the surfaces of which are the sides of the housing 21.

When the flange is disposed around the housing 21, the cover plate 212 further includes a first flange, where the first flange is disposed at an end of the first peripheral frame away from the first end plate, and the first flange extends outward. The case main body 211 further includes a second flange provided at one end of the second peripheral frame away from the second end plate, and the second flange extends outward. The first flange and the second flange are welded to form a flange on the housing 21.

The length of the first side 202 is greater than the length of the second side 203, and the length of the first side 202 is greater than or equal to 500mm. For example, the length of the first side panel may be 500mm, 600mm, 700mm, 800mm, or the like. The long side of the battery 20 contacts the bottom plate 11, improving the mounting stability of the battery 20.

As shown in fig. 4, the two ends of the first side 202 are respectively provided with a second side 203, and the two second sides 203 are respectively provided with a first explosion-proof valve 221 and a second explosion-proof valve 222. That is, the explosion-proof valves 22 are disposed on both sides of the battery 20, and the explosion-proof valves 22 disposed on both sides of the battery 20 can improve the pressure release capability of the battery 20 in thermal runaway, so as to avoid explosion risk caused by untimely pressure release of the battery 20 in thermal runaway.

The height of the first explosion-proof valve 221 is different from the height of the second explosion-proof valve 222, the height of the first explosion-proof valve 221 is the distance between the first explosion-proof valve 221 and the first side 202, and the height of the second explosion-proof valve 222 is the distance between the second explosion-proof valve 222 and the first side 202. The difference in the heights of the first and second explosion proof valves 221 and 222 can ensure that at least one explosion proof valve 22 is exposed to the reinforcing plate when the reinforcing plate is provided in the case 10. For example, a reinforcing plate is provided to the bottom plate 11, and at least one of the first explosion-proof valve 221 and the second explosion-proof valve 222 is higher than the reinforcing plate in a direction perpendicular to the bottom plate.

Optionally, the orthographic projection of the second explosion proof valve 222 on the second side 203 where the first explosion proof valve 221 is disposed does not have a coincident region with the first explosion proof valve 221. In an example, the second side 203 is provided with a recess 24, the first explosion-proof valve 221 is disposed on a side of the recess 24 of the second side 203 away from the bottom plate 11, and the second explosion-proof valve 222 is disposed on a side of the recess 24 of the other second side 203 close to the bottom plate 11. The recess 24 is centrally located in the height direction on the second side 203.

It should be noted that, in the embodiment of the present disclosure, the pole 25 of the battery 20 is disposed on the end surface 201 of the housing 21, the recess 24 is disposed on the end surface 201 of the housing 21, and the recess 24 on the housing 21 is used for accommodating the pole 25 of the adjacent battery 20. That is, a plurality of cells 20 are stacked in the battery pack, the end faces 201 of the adjacent cells 20 are opposite when stacked, the pole posts 25 on the first cell extend into the concave portions 24 of the second cell, and the first cell and the second cell are two adjacent cells 20.

In the battery device, the electrode posts 25 of the adjacent batteries 20 are accommodated in the concave portions 24, and when the batteries 20 are out of control, it is necessary to avoid high-temperature and high-pressure liquid and gas ejected from the batteries 20 from acting on the electrode posts 25 of the batteries 20, so that the distance between the concave portions 24 and the explosion-proof valve 22 is 0.4mm or more. For example, the distance between the recess 24 and the explosion-proof valve 22 is 0.4mm, 0.5mm, 0.8mm, 3mm, or the like. When the first explosion-proof valve 221 and the second explosion-proof valve 222 are provided on the battery 20, the distance between the first explosion-proof valve 221 and the recess 24 is 0.4mm or more, and the distance between the second explosion-proof valve 222 and the recess 24 is 0.4mm or more.

The frame 12 is formed by a plurality of structural beams including one or more first structural beams disposed opposite the second side 203 of the battery 20, and having vent valves disposed thereon. The second side 203 of the battery 20 is disposed opposite to the first structural beam, that is, the explosion-proof valve 22 of the battery 20 is disposed opposite to the vent valve of the case 10, so that high-temperature gas and liquid can be conveniently discharged when the battery 20 is thermally out of control, and heat spreading in the case 10 can be suppressed.

The battery cell 23 includes a battery cell main body and a tab provided at an end of the battery cell main body. For example, tabs may be respectively disposed at both ends of the battery cell main body in the length direction. One end of the battery cell main body is provided with a first tab, and the other end of the battery cell main body is provided with a second tab. One of the first tab and the second tab is a positive tab, and the other one of the first tab and the second tab is a negative tab.

It should be noted that, the battery core main body includes more than two pole pieces, the tab includes more than two single-piece tabs, single-piece tabs extend from the corresponding pole pieces respectively, the width of single-piece tabs is smaller than the width of the pole pieces, and a plurality of single-piece tabs are stacked to form the tab and are connected with the pole post 25, wherein the tab can be welded with the pole post 25. Wherein the single tab is made of a metal foil having good electrical and thermal conductivity, such as aluminum, copper, or nickel.

The cells 23 in the disclosed embodiments may be coiled cells or laminated cells. When the battery cell 23 is a laminated battery cell, the battery cell 23 is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form a laminated battery cell. When the battery cell 23 is a winding type battery cell, the winding type battery cell is obtained by winding a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece.

The battery cell main body is in a cuboid or approximately cuboid structure, and the battery cell main body is provided with two large surfaces which are oppositely arranged and a plurality of small surfaces which are positioned between the two large surfaces, and the area of the large surface of the battery cell main body is larger than that of the small surface of the battery cell main body. The electrode lugs are led out from the end part of the battery cell main body along the first direction, and the spreading direction of the electrode lugs is consistent with the extending direction of the large surface of the battery cell main body.

As shown in fig. 5, the explosion-proof valve 22 includes a connection portion 204 and an explosion-proof portion 205, the explosion-proof portion 205 is plugged in the explosion-proof through hole, the connection portion 204 at least partially surrounds the explosion-proof portion 205, and the connection portion 204 is connected with the housing 21. The explosion-proof portion 205 may be provided with a thinned region (e.g., a score) having a strength smaller than that of the surrounding region, and the thinned region of the explosion-proof portion 205 is torn when the battery 20 is thermally out of control.

The connecting portion 204 is disposed on a side of the housing 21 away from the battery cell 23, and the connecting portion 204 at least partially surrounds the explosion-proof through hole. The connection portion 204 may have a ring-shaped structure, and the connection portion 204 surrounds the explosion-proof through hole. For example, when the explosion-proof through hole is a round hole, the connection portion 204 is a circular ring; or when the explosion proof through hole is a rectangular hole, the connection portion 204 is a rectangular ring. The connection portion 204 may be welded to the housing 21, and of course, in practical applications, the connection portion 204 and the housing 21 may be connected by bonding or riveting. The connection portion 204 protrudes from the outer surface of the housing 21, and the connection portion 204 may be welded to the outer surface of the housing 21, for example, the connection portion 204 and the housing 21 may be welded by laser welding, resistance welding, friction welding, or the like.

The explosion-proof portion 205 and the connecting portion 204 may be arranged in a coplanar manner, that is, the explosion-proof valve 22 is integrally in a sheet structure, the outer ring of the explosion-proof sheet is the connecting portion 204, and the explosion-proof portion 205 is arranged in the connecting portion 204. Alternatively, the explosion-proof portion 205 may be recessed from the connection portion 204, that is, the explosion-proof portion 205 at least partially penetrates through the explosion-proof through hole into the interior 204 of the housing 21.

When the explosion-proof portion 205 is concavely disposed, the explosion-proof valve 22 further includes a transition portion, which is respectively connected to the connection portion 204 and the explosion-proof portion 205, and extends along a sidewall of the explosion-proof through hole. The transition portion extends along the lateral wall of the explosion-proof through hole, namely the transition portion is abutted to the explosion-proof through hole, the explosion-proof valve 22 is positioned through the lateral wall of the explosion-proof through hole, the explosion-proof valve 22 is convenient to install and position, and the production efficiency of the battery 20 is improved. And the transition part is supported through the explosion-proof through hole, so that the structural stability of the explosion-proof valve 22 is improved.

Further, the battery device provided in the embodiment of the present disclosure may further include a heat exchange device, where the heat exchange device is used to cool or heat the battery 20. The heat exchange means may comprise a heat exchange plate, which may be provided between the base plate 11 and the cells 20, or the heat exchange plate may be provided at a side of the cells 20 remote from the base plate 11, or the heat exchange plate may be provided between two adjacent cells 20. The battery 20 is provided with the explosion-proof valve 22 at one end thereof without a replacement heat plate, so that the heat exchange plate can be protected when the battery 20 is out of control.

The battery device provided by the embodiment of the disclosure includes a case 10 and a battery 20, the case 10 has a bottom plate 11, the battery 20 is arranged on the bottom plate 11, the battery includes a housing 21, a battery core 23 and an explosion-proof valve 22, the battery core 23 is arranged in the housing 21, the housing 21 has two oppositely arranged end faces 201 and a plurality of side faces located between the two end faces 201, the plurality of side faces include a first side face 202 oppositely arranged with the bottom plate 11 and a second side face 203 intersecting the first side face 202, an explosion-proof through hole is arranged on the second side face 203, the explosion-proof valve 22 is arranged on the explosion-proof through hole, the explosion-proof valve 22 is arranged on the second side face 203 of the battery 20, so that the explosion-proof valve 22 is released to the side face to release pressure after the explosion-proof valve 22 is opened, a heat exchange plate at the bottom or the top of the battery 20 is prevented from being damaged, the heat exchange plate is protected, and high-temperature and high-pressure liquid and gas in the battery 20 can be discharged from the side of the case 10 rapidly through the side face pressure release from the side face to reduce the heat spread of the battery 20.

The battery device provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery device is used for the electric vehicle, the battery device can be a battery pack which is installed on the electric vehicle and provides energy for the electric vehicle.

In practice, the battery pack may be mounted to the frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modularized battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A battery device, characterized in that the battery device comprises:

the box body is provided with a bottom plate;

the battery, the battery is located the bottom plate, the battery includes casing, electric core and explosion-proof valve, the electric core is located in the casing, the casing has two terminal surfaces that set up relatively and a plurality of sides that are located between two terminal surfaces, a plurality of the side include with the first side that the bottom plate set up relatively and with the crossing second side of first side, be provided with explosion-proof through-hole on the second side, explosion-proof valve is located explosion-proof through-hole.

2. The battery device of claim 1, wherein the first side has a length that is greater than a length of the second side.

3. The battery device of claim 2, wherein the first side has a length of 500mm or greater.

4. The battery device according to claim 1, wherein the second side faces are provided at both ends of the first side face, respectively, and the first explosion-proof valve and the second explosion-proof valve are provided on both the second side faces, respectively.

5. The battery device of claim 4, wherein a height of the first explosion proof valve is different from a height of the second explosion proof valve, the height of the first explosion proof valve being a distance between the first explosion proof valve and the first side, the height of the second explosion proof valve being a distance between the second explosion proof valve and the first side.

6. The battery device of claim 5, wherein the second side is provided with a recess, the first explosion-proof valve is disposed on a side of the recess of one second side away from the bottom plate, and the second explosion-proof valve is disposed on a side of the recess of the other second side close to the bottom plate.

7. The battery device of claim 6, wherein the distance between the explosion-proof valve and the recess is 0.4mm or more.

8. The battery device according to claim 6, wherein a pole is provided on the housing, the pole is provided to penetrate through the housing, and the pole protrudes at least partially from an end face of the housing, and the recess penetrates through the end face of the housing;

the battery device comprises a plurality of batteries which are sequentially arranged, the end faces of adjacent batteries in the plurality of batteries are oppositely arranged, a pole post of a first battery in the plurality of batteries stretches into a concave part of a second battery, and the first battery and the second battery are two adjacent batteries in the plurality of batteries.

9. The battery device of any one of claims 4-8, wherein the housing further comprises:

the reinforcing plate is arranged on the bottom plate, and at least one of the first explosion-proof valve and the second explosion-proof valve is higher than the reinforcing plate along the direction vertical to the bottom plate.

10. The battery device of claim 1, wherein the case further comprises:

the frame, the frame includes first structure roof beam, first structure roof beam with the second side of battery sets up relatively, be provided with discharge valve on the first structure roof beam.