CN219067130U - Battery shell and battery - Google Patents

Abstract

The utility model discloses a battery shell and a battery, wherein the battery shell comprises: the exhaust valve comprises a shell body and a special exhaust valve, wherein a through hole is formed in the shell body; the special exhaust valve cover is arranged at the through hole, the special exhaust valve comprises a valve shell, a valve plate and a control piece, the valve shell is provided with a valve cavity, a first through hole and a second through hole, the first through hole is communicated with the valve cavity, the second through hole is communicated with the valve cavity and the outside, and the control piece is used for driving the valve plate to move between a first position and a second position; wherein, in the first position, at least part of the valve plate is opposite to the first through hole in the axial direction of the first through hole; in the second position, the valve plate is staggered with the first through hole to open the first through hole, and the liquid injection piece is suitable for penetrating through the second through hole and the valve cavity and supplementing electrolyte into the shell body through the first through hole. According to the battery shell provided by the embodiment of the utility model, the problem of insufficient electrolyte in the service cycle of the battery can be solved, and the service life of the battery is ensured; but also can help the pressure relief in the shell body, thereby avoiding potential safety hazard.

Description

Battery shell and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery shell and a battery.

Background

In general, in the use of battery, electrolyte in the battery can reduce gradually, and in the related art, can directly seal the notes liquid hole of battery after the battery is accomplished annotating the liquid, seal the battery casing, annotate liquid hole and be difficult to secondary and open moreover, inconvenient electrolyte of supplying to in the battery, this makes the problem that electrolyte reduces gradually in the life of battery be difficult to solve, influences the life of battery. And in the use of battery, can carry out some chemical reaction in the battery for can constantly produce gas in the battery casing, because the battery casing is in sealed state, exhaust is more difficult, and the inside pressure of battery casing constantly increases, leads to the battery casing to bulge easily, can lead to battery casing to fracture even, not only influences the life of battery, causes the potential safety hazard moreover easily.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery housing, in which a valve plate is driven by a control member to move between a first position and a second position, and in the second position, the valve plate is staggered from the first through hole to open the first through hole, and an electrolyte filling member can supplement electrolyte into the housing body through the first through hole, so that the problem of insufficient electrolyte in the service cycle of the battery can be solved, and the service life of the battery can be ensured; in addition, the first through hole is communicated with the valve cavity, the second through hole is communicated with the valve cavity and the outside, so that the shell body is communicated with the outside, and gas in the shell body can be discharged to the outside through the through hole, the first through hole, the valve cavity and the second through hole, so that the battery shell is prevented from swelling or cracking due to excessive gas in the shell body, the service life of the battery is ensured, and potential safety hazards are avoided; and the first through hole and the second through hole can be shared for exhausting and injecting liquid to the battery shell, and a special exhaust valve is not required to be disassembled during liquid injection, so that the battery shell and the liquid injection hole are not required to be damaged.

The utility model also provides a battery with the battery shell.

A battery case according to an embodiment of the first aspect of the present utility model includes: the shell comprises a shell body, wherein a through hole is formed in the shell body; the special exhaust valve cover is arranged at the through hole and comprises a valve shell, a valve plate and a control piece, the valve shell is provided with a valve cavity, at least one first through hole and at least one second through hole, the first through hole is communicated with the through hole and the valve cavity, the second through hole is communicated with the valve cavity and the outside, the valve plate is movably arranged in the valve cavity, and the control piece is connected with the valve plate and used for driving the valve plate to move between a first position and a second position; wherein, in the first position, at least part of the valve plate is opposite to the first through hole in the axial direction of the first through hole; in the second position, the valve plate is staggered from the first through hole so as to open the first through hole, and the liquid injection piece is suitable for penetrating through the second through hole and the valve cavity and supplementing electrolyte into the shell body through the first through hole.

According to the battery shell disclosed by the embodiment of the utility model, the through hole is communicated with the valve cavity through the first through hole, the valve cavity is communicated with the outside through the second through hole, so that the shell body is communicated with the outside, and gas in the shell body can be discharged to the outside through the through hole, the first through hole, the valve cavity and the second through hole, so that the battery shell is prevented from swelling or cracking due to excessive gas generated in the shell body, the service life of the battery is ensured, and potential safety hazards are avoided; in addition, the valve plate is driven to move between the first position and the second position by the control piece, and in the second position, the valve plate is staggered with the first through hole to open the first through hole, and the electrolyte filling piece can supplement electrolyte into the shell body through the first through hole, so that the problem of insufficient electrolyte in the service cycle of the battery can be solved, and the service life of the battery is ensured; and the first through hole and the second through hole can be shared for exhausting and injecting liquid to the battery shell, and a special exhaust valve is not required to be disassembled during liquid injection, so that the battery shell and the liquid injection hole are not required to be damaged.

According to some embodiments of the utility model, in the first position, the valve plate has a venting state and a non-venting state, in the non-venting state, the valve plate closes the first through hole; in the exhaust state, the valve plate moves under the action of internal and external pressure difference to open the first through hole.

According to some embodiments of the utility model, at least one of the second through holes is disposed opposite to at least one of the first through holes, and a region of the valve chamber between the oppositely disposed first through holes and second through holes is a communication region; wherein, at least part of the valve plate is positioned in the communication area in the first position; in the second position, the valve plate is located outside the communication area.

According to some embodiments of the utility model, the valve plate is rotatable or movable between the first position and the second position.

According to some alternative embodiments of the utility model, the first through holes are a plurality of through holes arranged at intervals along a first direction, the valve plate is in a strip shape, and in the first position, the valve plate extends along the first direction.

According to some alternative embodiments of the utility model, the valve plate is rotatable between the first position and the second position, the first through holes are two spaced apart, the valve plate includes covering portions located on two opposite sides of the rotation axis of the valve plate, in the first position, the two covering portions are opposite to the two first through holes, respectively, and in the second position, in the rotation circumferential direction of the valve plate, the covering portions are located between the two first through holes.

According to some alternative embodiments of the utility model, the valve plate is rotatable between the first and second positions, the control member comprises a connecting portion and an operating portion, the operating portion is located outside the valve housing, the connecting portion is arranged through the valve housing and is movable relative to the valve housing, and one end of the connecting portion is connected with the operating portion and the other end of the connecting portion is connected with the valve plate.

According to some embodiments of the utility model, the valve housing comprises a valve seat and a valve cover, the valve seat is arranged on the housing body, the valve cover is arranged on the valve seat and defines the valve cavity with the valve seat, the first through hole is formed in the valve seat, the second through hole is formed in the valve cover, the control piece is arranged on the valve cover, and the valve seat is riveted, welded or integrally formed with the housing body.

According to some alternative embodiments of the utility model, at least the valve plate and the valve seat in the special exhaust valve are insulating members and corrosion resistant members.

A battery according to an embodiment of the second aspect of the present utility model includes: a battery case according to an embodiment of the above first aspect of the present utility model; and the battery cell is arranged in the battery shell.

According to the battery provided by the embodiment of the utility model, the valve plate is driven to move between the first position and the second position by the control piece, and in the second position, the valve plate is staggered with the first through hole so as to open the first through hole, and the electrolyte filling piece can supplement electrolyte into the shell body through the first through hole, so that the problem of insufficient electrolyte in the service period of the battery can be solved, and the service life of the battery is ensured; in addition, the first through hole is communicated with the valve cavity, the second through hole is communicated with the valve cavity and the outside, so that the shell body is communicated with the outside, and gas in the shell body can be discharged to the outside through the through hole, the first through hole, the valve cavity and the second through hole, so that the battery shell is prevented from swelling or cracking due to excessive gas in the shell body, the service life of the battery is ensured, and potential safety hazards are avoided; and the first through hole and the second through hole can be shared for exhausting and injecting liquid to the battery shell, and a special exhaust valve is not required to be disassembled during liquid injection, so that the battery shell and the liquid injection hole are not required to be damaged.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of a mounting location of a special vent valve in a battery housing with a cover plate on a side of the battery housing according to some embodiments of the utility model;

FIG. 2 is a schematic illustration of the mounting position of a special vent valve in a battery housing with a cover plate on the top surface of the battery housing according to some embodiments of the utility model;

FIG. 3 is a schematic view of the battery of FIG. 2 at another angle;

FIG. 4 is a schematic illustration of the mounting location of a special vent valve on a battery housing according to some embodiments of the utility model;

FIG. 5 is a schematic illustration of a special exhaust valve according to some embodiments of the present utility model, wherein the valve plate is in a first position;

FIG. 6 is a schematic view of the special exhaust valve of FIG. 5 with the valve plate in a second position;

FIG. 7 is a cross-sectional view of the special exhaust valve of FIG. 5 with the valve plate in a first position and in a non-exhaust state;

FIG. 8 is a cross-sectional view of the special exhaust valve of FIG. 5 with the valve plate in a first position and in an exhaust state;

fig. 9 is a cross-sectional view of the special exhaust valve of fig. 6 with the valve plate in a second position.

Reference numerals:

100. a battery;

10. a battery case; 1. a housing body; 2. a special exhaust valve; 20. a valve housing; 21. a valve cavity; 211. a communication region; 22. a valve seat; 221. a first through hole; 23. a valve cover; 231. a second through hole; 24. a valve plate; 241. a covering portion; 25. a control member; 251. a connection part; 252. an operation unit; 3. and a cover plate.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A battery case 10 according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

Referring to fig. 1 to 9, a battery case 10 according to an embodiment of the first aspect of the present utility model includes: the battery pack comprises a casing body 1 and a special exhaust valve 2, wherein a through hole is formed in the casing body 1, for example, referring to fig. 1-3, the casing body 1 comprises a cover plate 3, the cover plate 3 can be arranged on the side face of the battery casing 10, the cover plate 3 can also be arranged on the top face of the battery casing 10, and the through hole is formed in the cover plate 3. The special exhaust valve 2 is covered on the through hole, the special exhaust valve 2 comprises a valve shell 20, a valve plate 24 and a control piece 25, the valve shell 20 is provided with a valve cavity 21, at least one first through hole 221 and at least one second through hole 231, for example, the valve shell 20 can be provided with one first through hole 221, and the valve shell 20 can also be provided with a plurality of first through holes 221; the valve housing 20 may have one second through hole 231, and the valve housing 20 may also have a plurality of second through holes 231. The first through hole 221 communicates the through hole with the valve cavity 21, and gas in the housing body 1 can enter the valve cavity 21 through the through hole and the first through hole 221; the second through hole 231 communicates the valve cavity 21 with the outside, and the gas in the valve cavity 21 can be discharged to the outside through the second through hole 231, which is helpful for solving the problem of difficult exhaust of the battery case 10 during the use of the battery 100

Through first through-hole 221 intercommunication opening and valve pocket 21, second through-hole 231 intercommunication valve pocket 21 and outside can make casing body 1 and outside intercommunication to the gas in the casing body 1 can be through opening, first through-hole 221, valve pocket 21 and second through-hole 231 row outside, thereby to the pressure release in the casing body 1, prevent that the casing body 1 from producing too much gas and leading to battery case 10 to bulge or fracture, in order to guarantee battery 100's life, avoid causing the potential safety hazard.

The valve plate 24 is movably arranged in the valve cavity 21, a control member 25 is connected with the valve plate 24, and the control member 25 is used for driving the valve plate 24 to move between a first position and a second position. Wherein, referring to fig. 7 and 8, in the first position, at least part of the valve plate 24 is opposite to the first through hole 221 in the axial direction of the first through hole 221, the valve plate 24 may cover the first through hole 221, and the first through hole 221 may also be in communication with the valve chamber 21. Since the second through hole 231 can communicate the valve chamber 21 with the outside, the housing body 1 can be made to communicate with the outside when the first through hole 221 communicates the through hole with the valve chamber 21, so that the gas in the housing body 1 can be discharged to the outside through the through hole, the first through hole 221, the valve chamber 21, and the second through hole 231.

Referring to fig. 9, in the second position, the valve plate 24 is staggered from the first through hole 221 to open the first through hole 221, and the liquid injection member is adapted to pass through the second through hole 231 and the valve cavity 21 and supplement electrolyte into the housing body 1 through the first through hole 221, so as to solve the problem of insufficient electrolyte in the service cycle of the battery 100, and ensure the service life of the battery 100. On the other hand, the first through hole 221 and the second through hole 231 may be shared by exhausting the battery case 10 and injecting the electrolyte into the battery case 10, and the special exhaust valve 2 does not need to be damaged when the electrolyte is replenished into the case body 1 through the first through hole 221. For example, the liquid outlet of the liquid injection piece can be positioned in the first through hole 221, and the electrolyte enters the shell body 1 through the first through hole 221 and the through hole; the liquid outlet of the liquid injection piece can also pass through the first through hole 221, and electrolyte enters the shell body 1 through the through hole.

In the related art, a liquid injection hole for injecting liquid into a battery is formed in a battery shell, and the liquid injection hole of the battery is directly sealed after the liquid injection of the battery is completed, so that the battery shell is sealed; when the liquid is refilled, the liquid filling hole needs to be opened for the second time, so that the liquid filling hole and the battery case are easily damaged, and therefore, it is difficult to realize the second liquid filling. The battery case 10 of this application has the opening on, and the opening can regard as annotating the liquid hole, when annotating the liquid once more, only need drive valve block 24 through control 25 in the motion to the second position, and valve block 24 staggers with first through-hole 221 in order to open first through-hole 221, and first through-hole 221 and opening intercommunication, annotate the liquid piece and can be through first through-hole 221 and opening to the battery case 1 in supplementary electrolyte to need not dismantle special discharge valve 2, also need not to damage battery case 10 and annotate the liquid hole.

According to the battery case 10 of the embodiment of the utility model, the valve plate 24 is driven to move between the first position and the second position by the control member 25, and in the second position, the valve plate 24 is staggered with the first through hole 221 to open the first through hole 221, and the electrolyte filling member can supplement electrolyte into the case body 1 through the first through hole 221, so that the problem of insufficient electrolyte in the service period of the battery 100 can be solved, and the service life of the battery 100 is ensured; in addition, the through hole is communicated with the valve cavity 21 through the first through hole 221, the valve cavity 21 is communicated with the outside through the second through hole 231, so that the shell body 1 is communicated with the outside, and therefore gas in the shell body 1 can be discharged to the outside through the through hole, the first through hole 221, the valve cavity 21 and the second through hole 231, and the situation that the battery shell 10 is inflated or cracked due to excessive gas generated in the shell body 1 is prevented, so that the service life of the battery 100 is ensured, and potential safety hazards are avoided; in addition, the first through hole 221 and the second through hole 231 can be shared for exhausting and injecting the liquid into the battery shell 10, and the special exhaust valve 2 is not required to be disassembled during liquid injection, so that the battery shell 10 and the liquid injection hole are not required to be damaged.

Referring to fig. 7 and 8, according to some embodiments of the present utility model, in the first position, the valve plate 24 has a venting state in which the valve plate 24 closes the first through hole 221 and the valve cavity 21 may be blocked by the valve plate 24, the gas in the case body 1 is difficult to be discharged into the valve cavity 21, and the gas in the valve cavity 21 is also difficult to be discharged into the case body 1, so that the sealability of the battery case 10 may be ensured. In the exhaust state, the valve plate 24 moves under the action of internal and external pressure difference to open the first through hole 221, so that the first through hole 221 is communicated with the valve cavity 21, and gas in the shell body 1 can be discharged into the valve cavity 21 to realize pressure relief of the shell body 1, so that the battery shell 10 is prevented from swelling or cracking due to excessive gas generated in the shell body 1, the service life of the battery 100 is ensured, and potential safety hazards are avoided.

For example, during the use of the battery 100, some chemical reactions may be performed inside the battery 100, so that gas may be continuously generated inside the housing body 1, and as the gas increases gradually, the pressure inside the housing body 1 increases gradually; when a certain amount of gas is generated in the casing body 1, the pressure in the casing body 1 is greater than the external air pressure, that is, the casing body 1 has a pressure difference with the external air pressure, the gas in the casing body 1 can push the valve plate 24 upwards, so that the valve plate 24 moves to open the first through hole 221, the valve plate 24 is in an exhaust state, and the gas can be discharged into the valve cavity 21 from the first through hole 221. Along with the discharge of the gas, the pressure in the housing body 1 is gradually reduced, the internal and external pressure difference is gradually reduced, or the external pressure acting on the upper part of the valve plate 24 is larger than the gas pressure in the housing body 1, the gas pressure in the housing body 1 is insufficient to counter the external gas pressure, the valve plate 24 is restored to the original state (i.e. the non-exhaust state), and the first through hole 221 is closed, so that the external gas can be prevented from entering the housing body 1.

Referring to fig. 7-9, according to some embodiments of the present utility model, at least one second through hole 231 is disposed opposite to at least one first through hole 221, for example, the valve housing 20 has two first through holes 221 and two second through holes 231, one of the first through holes 221 is disposed opposite to one of the second through holes 231, and the other first through hole 221 is disposed opposite to the other second through hole 231. The at least one second through hole 231 is arranged opposite to the at least one first through hole 221, so that the electrolyte can conveniently pass through the second through hole 231 and supplement electrolyte into the shell body 1 through the corresponding first through hole 221. The area of the valve chamber 21 between the oppositely disposed first through hole 221 and second through hole 231 is a communication area 211, and the electrolyte injection member may pass through the second through hole 231 and the communication area 211 and may supplement the electrolyte into the housing body 1 through the corresponding first through hole 221.

Referring to fig. 7-9, wherein in the first position, at least part of the valve plate 24 is located in the communication region 211, and at least part of the valve plate 24 is opposite to the first through hole 221 in the axial direction of the first through hole 221; in the second position, the valve plate 24 is located outside the communication area 211, the valve plate 24 is staggered with the first through hole 221 and the second through hole 231 to open the first through hole 221, and the liquid injection member is suitable for passing through the second through hole 231 and the communication area 211 and supplementing electrolyte into the housing body 1 through the first through hole 221.

According to some embodiments of the utility model, the valve plate 24 is rotatable between a first position and a second position, the axis of rotation of the valve plate 24 may be perpendicular to the valve plate 24; alternatively, the valve plate 24 is movable between a first position and a second position. When the valve plate 24 moves to the first position, at least part of the valve plate 24 is opposed to the first through hole 221 in the axial direction of the first through hole 221; when the valve plate 24 moves to the second position, the valve plate 24 is staggered from the first through hole 221 to open the first through hole 221, and the liquid injection member is suitable for passing through the second through hole 231 and the valve cavity 21 and supplementing electrolyte into the housing body 1 through the first through hole 221.

Referring to fig. 7, according to some alternative embodiments of the present utility model, the first through hole 221 is a plurality of pieces spaced apart along the first direction, the valve sheet 24 is in an elongated sheet shape, and in the first position, the valve sheet 24 extends along the first direction, and at least a portion of the valve sheet 24 is opposite to the first through hole 221 in the axial direction of the first through hole 221, so that the valve sheet 24 may cover the first through hole 221. For example, the first through holes 221 are two spaced apart, and the valve sheet 24 has a long sheet shape extending in a first direction, which may refer to the left-right direction in fig. 7.

Referring to fig. 7-9, according to some alternative embodiments of the present utility model, the valve plate 24 is rotatable between a first position and a second position, the first through holes 221 are two spaced apart, the valve plate 24 includes covering portions 241 located on opposite sides of the rotation axis of the valve plate 24, and in the first position, the two covering portions 241 are opposite to the two first through holes 221, respectively, and the two covering portions 241 can cover the two first through holes 221, respectively; in the second position, in the rotation circumferential direction of the valve plate 24, the covering portion 241 is located between the two first through holes 221, the valve plate 24 is staggered from the first through holes 221 to open the first through holes 221, and the liquid injection member is adapted to pass through the second through holes 231 and the valve cavity 21 and supplement the electrolyte into the housing body 1 through the first through holes 221. For example, in the first position, the extending direction of the valve plate 24 is parallel to the connecting line direction of the two first through holes 221; in the first position, the extending direction of the valve plate 24 is perpendicular to the connecting line direction of the two first through holes 221.

Referring to fig. 7-9, according to some alternative embodiments of the present utility model, the valve plate 24 is rotatable between a first position and a second position, the control member 25 includes a connection portion 251 and an operation portion 252, and the operation portion 252 is located outside the valve housing 20 to facilitate operation; the connecting portion 251 is disposed through the valve housing 20, and the connecting portion 251 is movable relative to the valve housing 20, one end of the connecting portion 251 is connected to the operating portion 252, and the other end of the connecting portion 251 is connected to the valve plate 24, and the valve plate 24 can be controlled to rotate between the first position and the second position by controlling the operating portion 252, for example, by rotating the operating portion 252 to drive the valve plate 24 to rotate.

Referring to fig. 7 to 9, according to some embodiments of the present utility model, the valve housing 20 includes a valve seat 22 and a valve cover 23, the valve seat 22 is provided to the housing body 1, the valve cover 23 is provided to the valve seat 22, and a valve cavity 21 is defined between the valve cover 23 and the valve seat 22, a first through hole 221 is formed at the valve seat 22, and a second through hole 231 is formed at the valve cover 23, for example, the first through hole 221 and the second through hole 231 have the same aperture. The control member 25 is provided on the valve cover 23, and the valve seat 22 is riveted, welded or integrally formed with the housing body 1, for example, the valve cover 23 is riveted, welded or integrally formed with the valve seat 22.

For example, referring to fig. 4, according to other embodiments of the present utility model, when the special exhaust valve 2 is provided in a pouch cell, the valve seat 22 may be thermally fused to an aluminum plastic film of the pouch cell.

According to some alternative embodiments of the present utility model, at least the valve plate 24 and the valve seat 22 of the special exhaust valve 2 are insulating members and corrosion resistant members, which helps to ensure the service life of the special exhaust valve 2. For example, the valve plate 24 may be made of elastic materials such as rubber, resin or PVC, and in the exhaust state, the valve plate 24 moves under the action of the internal and external pressure difference to open the first through hole 221, so that the valve plate 24 is elastically deformed to a certain extent, and the gas in the housing body 1 may be exhausted into the valve cavity 21, so as to realize pressure relief of the housing body 1; as the gas is discharged, the pressure in the case body 1 is gradually reduced, the internal and external pressure difference is gradually reduced, the first through hole 221 is closed by the external pressure and the resilience of the valve plate 24, and the valve plate 24 becomes a non-discharge state. The choice of elastic material may be determined by factors such as the gas production rate, and the area of valve sheet 24 of battery 100.

The battery 100 according to the embodiment of the second aspect of the present utility model includes: the battery cell and the battery case 10 according to the embodiment of the first aspect of the present utility model are provided in the battery case 10, for example, in the second position, the valve plate 24 is offset from the first through hole 221 to open the first through hole 221, and the electrolyte can be replenished into the battery cell through the second through hole 231, the valve cavity 21 and the first through hole 221 through the opening of the case body 1.

According to the battery 100 of the embodiment of the utility model, the valve plate 24 is driven to move between the first position and the second position by the control member 25, and in the second position, the valve plate 24 is staggered with the first through hole 221 to open the first through hole 221, and the electrolyte can be supplemented into the shell body 1 through the first through hole 221 by the electrolyte injection member, so that the problem of insufficient electrolyte in the service period of the battery 100 can be solved, and the service life of the battery 100 is ensured; in addition, the through hole is communicated with the valve cavity 21 through the first through hole 221, the valve cavity 21 is communicated with the outside through the second through hole 231, so that the shell body 1 is communicated with the outside, and therefore gas in the shell body 1 can be discharged to the outside through the through hole, the first through hole 221, the valve cavity 21 and the second through hole 231, and the situation that the battery shell 10 is inflated or cracked due to excessive gas generated in the shell body 1 is prevented, so that the service life of the battery 100 is ensured, and potential safety hazards are avoided; in addition, the first through hole 221 and the second through hole 231 can be shared for exhausting and injecting the liquid into the battery shell 10, and the special exhaust valve 2 is not required to be disassembled during liquid injection, so that the battery shell 10 and the liquid injection hole are not required to be damaged.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, "plurality" means two or more.

In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery case (10), characterized by comprising:

the shell comprises a shell body (1), wherein a through hole is formed in the shell body (1);

the special exhaust valve (2) is covered on the through hole, the special exhaust valve (2) comprises a valve shell (20), a valve plate (24) and a control piece (25), the valve shell (20) is provided with a valve cavity (21), at least one first through hole (221) and at least one second through hole (231), the first through hole (221) is communicated with the through hole and the valve cavity (21), the second through hole (231) is communicated with the valve cavity (21) and the outside, the valve plate (24) is movably arranged in the valve cavity (21), and the control piece (25) is connected with the valve plate (24) and is used for driving the valve plate (24) to move between a first position and a second position;

wherein, in the first position, at least part of the valve plate (24) is opposite to the first through hole (221) in the axial direction of the first through hole (221); in the second position, the valve plate (24) is staggered from the first through hole (221) so as to open the first through hole (221), and the liquid injection piece is suitable for penetrating through the second through hole (231) and the valve cavity (21) and supplementing electrolyte into the shell body (1) through the first through hole (221).

2. The battery housing (10) of claim 1, wherein in the first position the valve plate (24) has a vented state and a non-vented state, in the non-vented state the valve plate (24) closes the first through hole (221); in the exhaust state, the valve plate (24) moves under the action of an internal-external pressure difference to open the first through hole (221).

3. The battery case (10) according to claim 1, wherein at least one of the second through holes (231) is provided opposite to at least one of the first through holes (221), and a region of the valve chamber (21) between the oppositely provided first through holes (221) and second through holes (231) is a communication region (211);

wherein, in the first position, at least part of the valve plate (24) is located in the communication area (211); in the second position, the valve plate (24) is located outside the communication area (211).

4. The battery housing (10) of claim 1, wherein the valve plate (24) is rotatable or movable between the first position and the second position.

5. The battery case (10) according to claim 4, wherein the first through hole (221) is a plurality of pieces arranged at intervals along a first direction, the valve sheet (24) is in an elongated sheet shape, and in the first position, the valve sheet (24) extends along the first direction.

6. The battery case (10) according to claim 4, wherein the valve plate (24) is rotatable between the first position in which the two cover portions (241) are respectively opposed to the two first through holes (221) and the second position in which the cover portions (241) are located between the two first through holes (221) in the rotation circumferential direction of the valve plate (24), the first through holes (221) being two spaced apart, the valve plate (24) including cover portions (241) located on opposite sides of the rotation axis of the valve plate (24).

7. The battery housing (10) of claim 4, wherein the valve plate (24) is rotatable between the first position and the second position, the control member (25) includes a connection portion (251) and an operation portion (252), the operation portion (252) is located outside the valve housing (20), the connection portion (251) is provided through the valve housing (20) and movable relative to the valve housing (20), and one end of the connection portion (251) is connected to the operation portion (252) and the other end is connected to the valve plate (24).

8. The battery housing (10) according to any one of claims 1-7, wherein the valve housing (20) comprises a valve seat (22) and a valve cover (23), the valve seat (22) is provided on the housing body (1), the valve cover (23) is provided on the valve seat (22) and defines the valve cavity (21) with the valve seat (22), the first through hole (221) is formed in the valve seat (22), the second through hole (231) is formed in the valve cover (23), the control member (25) is provided on the valve cover (23), and the valve seat (22) is riveted, welded or integrally formed with the housing body (1).

9. The battery housing (10) according to claim 8, wherein at least the valve plate (24) and the valve seat (22) of the special exhaust valve (2) are insulating and corrosion resistant.

10. A battery (100), characterized by comprising:

the battery housing (10) according to any one of claims 1-9;

and the battery cell is arranged in the battery shell (10).

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