CN220065989U - Battery shell and battery - Google Patents

Abstract

The utility model discloses a battery shell and a battery, wherein the battery shell comprises: the shell comprises a shell body, wherein an accommodating space is formed in the shell body, and a diversion flow passage communicated with the accommodating space is formed in the peripheral wall of the shell body; the pressure relief structure comprises a sealing element and a pressure relief box, wherein the sealing element is bonded and connected with the shell body, the sealing element is sealed at one end of the diversion flow channel away from the accommodating space, the pressure relief box is connected with the shell body and is provided with a pressure relief flow channel, and the sealing element is arranged to be bonded and separated with the shell body when the temperature in the diversion flow channel is greater than a set value and to enable the diversion flow channel to be communicated with the pressure relief flow channel. The embodiment of the utility model realizes that high-pressure gas generated in the shell body flows into the pressure relief box and is discharged, and the problem that the lithium battery is easy to explode is solved.

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

Lithium batteries are widely used in consumer electronics, energy storage markets, light power, and electric vehicles, and lithium battery cases are containers for housing positive and negative electrodes and electrolyte materials.

At present, a lithium battery is a battery which uses lithium metal or lithium alloy as a negative electrode material and uses nonaqueous electrolyte solution, when the lithium battery is used for a long time, short circuit is easy to occur in the lithium battery, and when the temperature in the lithium battery is suddenly increased, the internal pressure of the lithium battery is rapidly increased, and the existing lithium battery shell is generally made of aluminum alloy or composite material, so that the pressure cannot be released in time, and the lithium battery is easy to explode.

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 case, which can prevent the explosion of a lithium battery by flowing and discharging high-pressure gas generated in the case body into a pressure release box.

The battery case according to an embodiment of the present utility model includes: the shell comprises a shell body, wherein an accommodating space is formed in the shell body, and a diversion flow passage communicated with the accommodating space is formed in the peripheral wall of the shell body; the pressure relief structure comprises a sealing element and a pressure relief box, wherein the sealing element is bonded and connected with the shell body, the sealing element is sealed at one end of the diversion flow channel away from the accommodating space, the pressure relief box is connected with the shell body and is provided with a pressure relief flow channel, and the sealing element is arranged to be bonded and separated with the shell body when the temperature in the diversion flow channel is greater than a set value and to enable the diversion flow channel to be communicated with the pressure relief flow channel.

According to the battery shell provided by the embodiment of the utility model, the high-temperature and high-pressure gas in the shell body flows to the diversion flow channel, the pressure release structure is connected to the outside of the diversion flow channel, the sealing property of the sealing piece and the shell body is poor due to the high-temperature and high-pressure gas, and the sealing piece is separated from the bonding part, and the high-temperature and high-pressure gas in the diversion flow channel can flow into the pressure release box, so that the high-temperature and high-pressure gas in the shell body is released, and the explosion of the battery shell of the lithium battery is prevented.

According to the battery shell disclosed by the embodiment of the utility model, the joint of the sealing piece and the shell body is provided with the hot melt adhesive tape, the pressure relief structure further comprises a heat conduction structure, one part of the heat conduction structure is exposed in the flow guide flow channel, and the other part of the heat conduction structure is connected with the hot melt adhesive tape.

According to the battery shell provided by the embodiment of the utility model, the heat conducting structure comprises the heat conducting ring and the heat conducting rod, the sealing piece is provided with the mounting opening which is opened towards the inside of the flow guiding flow channel, the heat conducting ring is mounted in the mounting opening, the heat conducting rod is arranged in the sealing piece in a penetrating manner, one end of the heat conducting rod is in contact connection with the heat conducting ring, and the other end of the heat conducting rod is connected with the hot melt adhesive tape.

According to the battery shell disclosed by the embodiment of the utility model, the heat conducting rod comprises a first section, a middle section and a second section, wherein the first section and the second section are parallel and spaced and respectively connected with the two ends of the middle section in a bending way, the first section is connected with the heat transfer ring, and the second section is connected with the hot melt adhesive tape.

According to the battery case disclosed by the embodiment of the utility model, the pressure release box is internally provided with the first elastic piece, the first elastic piece is connected between the sealing piece and the inner wall of the pressure release box, and the first elastic piece is used for applying elastic force to the sealing piece towards the case body.

According to the battery case provided by the embodiment of the utility model, the diversion flow passage comprises an inner side opening, a main flow passage and an outer side opening, the main flow passage extends along the axial direction of the case body, the inner side opening is used for communicating one end of the main flow passage with the accommodating space, and the pressure relief structure is arranged at the outer side opening.

According to the battery shell provided by the embodiment of the utility model, the ventilation film is arranged at the opening of the inner side.

According to the battery shell, the battery comprises a pressure relief box, and the battery shell is characterized by further comprising a gas storage bottle, wherein a gas storage cavity is arranged in the gas storage bottle, the gas storage bottle is detachably connected with the pressure relief box, and the gas storage cavity is communicated with the pressure relief flow channel.

According to the battery shell provided by the embodiment of the utility model, the gas storage bottle is provided with the movable part and the alarm module, the movable part is movably arranged in the gas storage cavity, and the movable part is pushed to trigger the alarm module to alarm when the gas pressure in the gas storage cavity is larger than a set value.

The embodiment of the utility model also discloses a battery, which comprises the battery shell.

The battery according to the embodiment of the present utility model has the same advantages as those of the battery case according to the prior art, and is not described here.

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 perspective view of a battery case according to an embodiment of the present utility model;

fig. 2 is a cross-sectional view of a battery case according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of embodiment of the utility model at A of FIG. 2;

fig. 4 is an enlarged view of embodiment of the utility model at B of fig. 2.

Reference numerals:

the battery case 100 is provided with a battery case,

the housing body 1, the accommodation space 11,

a diversion flow passage 2, an inner opening 21, a main flow passage 22, an outer opening 23,

a ventilated membrane 3, a pressure relief box 4, an external threaded pipe 5, a one-way valve 6, a gas cylinder 7, a limiting ring 8, a sealing element 9, a mounting port 91,

the heat conducting structure 10, the heat conducting ring 101, the heat conducting rod 102, the first section 1021, the middle section 1022, the second section 1023, the first elastic piece 12, the movable piece 13, the second elastic piece 14, the piezoelectric ceramic piece 15, the connecting part 16, the alarm 17, the dust screen 18 and the hot melt adhesive tape 19.

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.

The following describes a battery case 100 according to an embodiment of the present utility model with reference to fig. 1 to 4, which realizes that high-pressure gas generated in a case body 1 flows into a pressure relief case 4 and is discharged, preventing the problem that a lithium battery is easily exploded.

As shown in fig. 1 to 4, a battery case 100 according to an embodiment of the present utility model includes a case body 1 and a pressure release structure.

Wherein, an accommodating space 11 is formed in the housing body 1, and a diversion flow passage 2 communicated with the accommodating space 11 is formed in the peripheral wall of the housing body 1; in practice, the accommodating space 11 is provided with electrolyte, a diaphragm, a positive electrode, a negative electrode of a lithium battery and the like, the peripheral wall of the casing body 1 is internally provided with a diversion flow channel 2, and high-temperature and high-pressure gas in the accommodating space 11 can flow to the diversion flow channel 2.

In addition, the pressure release structure includes sealing member 9 and pressure release box 4, and sealing member 9 bonds with casing body 1 and links to each other, and sealing member 9 seals in the one end that accommodation space 11 was kept away from to water conservancy diversion runner 2, mainly used shutoff water conservancy diversion runner 2 towards the outside one side of casing body 1.

The pressure relief box 4 is connected with the shell body 1 and is provided with a pressure relief flow channel, and the sealing piece 9 is arranged to be bonded and separated with the shell body 1 when the temperature in the diversion flow channel 2 is greater than a set value and to enable the diversion flow channel 2 to be communicated with the pressure relief flow channel.

In practice, the space in the diversion flow passage 2 and the pressure relief box 4 is not communicated in a normal state, the pressure relief box 4 is positioned outside the sealing element 9 and surrounds the area where the sealing element 9 is positioned, when the containing space 11 is provided with high-temperature and high-pressure gas, the gas in the containing space 11 flows into the diversion flow passage 2, the high-temperature and high-pressure gas exists in the diversion flow passage 2, under the influence of temperature and pressure, the bonding part of the sealing element 9 and the shell body 1 is cracked and separated, particularly when the gas temperature and pressure reach a certain value, the bonding separation of the sealing element 9 and the shell body 1 can occur, so that the high-temperature and high-pressure gas in the diversion flow passage 2 flows into the pressure relief box 4 to realize pressure relief in the shell body 1, and further the explosion of the battery shell 100 of the lithium battery is prevented.

In some embodiments, the connection between the sealing element 9 and the housing body 1 is provided with a hot-melt adhesive tape 19, the pressure release structure further comprises a heat conducting structure 10, and one part of the heat conducting structure 10 is exposed in the diversion flow passage 2 and the other part is connected with the hot-melt adhesive tape 19.

Specifically, when the heating temperature exceeds the melting point of the hot melt adhesive tape 19, the temperature is generally 180 degrees to 220 degrees, the hot melt adhesive tape 19 is liquefied in a high temperature state, and referring to fig. 3, the hot melt adhesive tape 19 is connected to the housing body 1 and is partially connected to the sealing member 9, and a part of the heat conducting structure 10 is exposed in the flow guiding flow channel 2, so that high temperature and high pressure gas in the flow guiding flow channel 2 can be transferred to the heat conducting structure 10 through the flow guiding flow channel 2.

Further, the hot melt adhesive tape 19 is connected to the other end of heat conduction structure 10, heat conduction structure 10 can give hot melt adhesive tape 19 with heat transfer for hot melt adhesive tape 19 can be liquefied under the environment of high temperature high pressure, and the adhesive nature between softened hot melt adhesive tape 19 and the sealing member 9 reduces after the hot melt adhesive tape 19 is heated, and sealing member 9 can't be stuck to hot melt adhesive tape 19, and sealing member 9 outwards removes is promoted to high temperature high pressure gas, and sealing member 9 is not plugging up water conservancy diversion runner 2, and high temperature high pressure gas can flow in pressure release box 4, accomplishes the pressure release.

In some embodiments, the heat conducting structure 10 includes a heat conducting ring 101 and a heat conducting rod 102, the sealing member 9 is provided with a mounting opening 91 opened towards the inside of the diversion flow passage 2, the heat conducting ring 101 is mounted in the mounting opening 91, the heat conducting ring 101 is located in the diversion flow passage 2, the heat conducting rod 102 is arranged in the sealing member 9 in a penetrating manner through the mounting opening 91, one end of the heat conducting rod 102 is in contact connection with the heat conducting ring 101, and the other end is connected with the hot melt adhesive tape 19.

In practice, the heat transfer ring 101 is located in the diversion flow channel 2, the heat transfer ring 101 is connected with the heat conducting rod 102, and the heat conducting rod 102 is connected with the sealing element 9 and simultaneously connected with the hot melt adhesive tape 19, the heat transfer ring 101 transfers the high-temperature high-pressure gas in the diversion flow channel 2 to the heat conducting rod 102, the heat conducting rod 102 transfers the heat to the sealing element 9 and the hot melt adhesive tape 19 again, the hot melt adhesive tape 19 is softened after being heated, the adhesiveness between the softened hot melt adhesive tape 19 and the sealing element 9 is reduced, and the sealing element 9 is separated towards the direction far away from the shell body 1 under the pressure of high-pressure gas.

In some embodiments, the heat conductive rod 102 includes a first section 1021, a middle section 1022 and a second section 1023, wherein the first section 1021 is spaced apart from the second section 1023 in parallel and is respectively connected to two ends of the middle section 1022 in a bending manner, the first section 1021 is connected to the heat transfer ring 101, and the second section 1023 is connected to the hot melt adhesive tape 19.

With continued reference to fig. 3, one end of the first section 1021 of the heat transfer rod 102 is connected to the heat transfer ring 101 and extends toward the outside of the flow guide channel 2, while the first section 1021 is also connected to the seal 9, while the second section 1023 is connected at the hot melt adhesive strip 19 spaced apart and parallel to the first section 1021, and the second section 1023 is located within the pressure relief box 4 and connected to the seal 9, with the intermediate section 1022 connecting the first section 1021 and the second section 1023 at the seal 9.

At this time, the first section 1021, the second section 1023 and the middle section 1022 are all connected at the sealing member 9, and the first section 1021, the middle section 1022 and the second section 1023 are in bending distribution, and the heat conducting rod 102 can connect the heat transfer ring 101 located in the flow guiding flow channel 2 with the hot melt adhesive tape 19 located outside the flow guiding flow channel 2, so that after the high-temperature high-pressure gas is transferred to the heat transfer ring 101 through the flow guiding flow channel 2, the high-temperature high-pressure gas can be transferred from the heat transfer ring 101 to the hot melt adhesive tape 19 through the heat conducting rod 102, and the hot melt adhesive tape 19 is melted at high temperature.

In some embodiments, a first elastic member 12 is further disposed in the pressure relief box 4, the first elastic member 12 is connected between the sealing member 9 and the inner wall of the pressure relief box 4, and the first elastic member 12 is used to apply an elastic force to the sealing member 9 toward the housing body 1.

In practice, the first elastic members 12 may be provided in plural, and the plural first elastic members 12 are parallel to each other, one end of the first elastic member 12 is connected to the sealing member 9, and the other end is connected to the inner wall of the pressure release box 4, and the sealing member 9 is bonded with the hot melt adhesive tape 19 in a normal state, so that the pressure release box 4 is not communicated with the flow guide flow channel 2, after the hot melt adhesive tape 19 is subjected to a high temperature, the bonding property between the hot melt adhesive tape 19 and the sealing member 9 is greatly reduced, and under the pushing of the high-temperature and high-pressure gas in the interior, the connection between the sealing member 9 and the connection part of the housing body 1 fails.

And under normal state, the first elastic member 12 applies elastic force towards the shell body 1 to the sealing member 9, and the sealing member 9 is bonded with the shell body 1 through the hot melt adhesive tape 19 under normal state, so that tightness is maintained and compression is realized, when the joint of the sealing member 9 and the hot melt adhesive tape 19 fails, the pressure of high-temperature high-pressure gas is greater than the elastic force of the first elastic member 12 towards the shell body 1, so that the gas flows into the pressure relief box 4, and pressure relief is completed.

In some embodiments, the diversion flow passage 2 includes an inner opening 21, a main flow passage 22 and an outer opening 23, the main flow passage 22 extends along the axial direction of the housing body 1, the inner opening 21 communicates one end of the main flow passage 22 with the accommodating space 11, and the pressure release structure is installed at the outer opening 23.

In practice, the sprue is located the inside of perisporium, and extends along casing body 1 axial, can be along the casing body 1 one end flow direction other end of battery with the sprue design, it is more convenient to design the sprue when making casing body 1, and can make the high temperature high pressure gas in the accommodation space 11 flow smoothly, and pressure release structure installs in outside opening 23 department, and pressure release box 4 of pressure release structure can the bulk connection in the outside of casing body 1, does not influence the accommodation space 11 of battery inside, also makes things convenient for the pressure release.

It should be noted that, a part of the sealing element 9 extends into the diversion flow channel 2 from the outside opening 23 of the housing body 1, and the sealing element 9 is connected to the housing body 1 above and below the outside opening through the hot melt adhesive tape 19, so that the sealing in a normal state can be maintained, and other positions of the sealing element 9 are not in sealing connection with the housing body 1, so that after the hot melt adhesive tape 19 is softened, the connection failure between the sealing element 9 and the housing body 1 is facilitated, and the pressure relief is facilitated.

In addition, it should be noted that in practice, the pressure relief structures may be designed into two groups, and the two groups are spaced apart at the periphery of the housing body 1, so that the pressure relief is fast, and the high-temperature and high-pressure gas in the accommodating space 11 inside the housing body 1 is discharged as soon as possible.

In some embodiments, a gas permeable membrane 3 is provided at the inner opening. In practice, the ventilation membrane 3 is plugged in the inner opening, and the ventilation membrane 3 comprises a plurality of ventilation pores, and high-temperature and high-pressure gas in the accommodating space 11 flows into the diversion flow channel 2 through the ventilation pores, so that the diversion flow channel 2 is communicated with the accommodating space 11.

In some embodiments, the air storage device further comprises an air storage bottle 7, an air storage cavity is arranged in the air storage bottle 7, the air storage bottle 7 is detachably connected with the pressure release box 4, and the air storage cavity is communicated with the pressure release flow channel.

Referring to fig. 2, the gas cylinder 7 is detachably connected with the pressure release box 4, specifically, the pressure release box 4 is connected with an external threaded pipe 5 towards one side connected with the gas cylinder 7, and an internal thread is arranged at the position where the gas cylinder 7 is connected with the pressure release box 4, so that the pressure release box 4 and the gas cylinder 7 can be in threaded connection to realize detachable connection.

Under normal condition, pressure release box 4 and gas bomb 7 are connected, and gas storage chamber and the inside intercommunication of pressure release box 4, when having high temperature high pressure gas in the casing body 1 of battery, high temperature high pressure gas can follow in the pressure release box 4 to the gas bomb 7 in, is equivalent to pressure release box 4, gas bomb 7, water conservancy diversion runner 2 and the accommodation space 11 in the casing body 1 all communicate, the volume increase of whole intercommunication to make the pressure in the accommodation space 11 reduce, can realize the pressure release of high temperature high pressure gas, thereby prevent that casing body 1 from appearing the phenomenon of blasting.

In some embodiments, the gas storage bottle 7 is provided with a movable part 13 and an alarm module, the movable part 13 is movably arranged in the gas storage cavity, and the movable part 13 is pushed to trigger the alarm module to alarm when the gas pressure in the gas storage cavity is larger than a set value.

In practice, the gas bomb 7 and the pressure relief box 4 are both positioned outside the casing body 1, the gas bomb 7 is placed along the axial direction of the casing body 1, and the gas bomb 7 can be limited by the limiting ring 8 outside the casing body 1, so that the unstable installation of the gas bomb 7 is prevented. The gas bomb 7 is equipped with connecting portion 16 far away from the one side of pressure release box 4, and connecting portion 16 is close to the one side of pressure release box 4 and has movable part 13 through second elastic component 14 elastic connection, and still is equipped with piezoceramics piece 15 between connecting portion 16 and the movable part 13, when there is high temperature high pressure gas constantly in pressure release box 4, and when high temperature high pressure gas always flows to the gas bomb 7, can promote the position activity of movable part 13 towards connecting portion 16.

After being pushed to a certain extent, that is to say after the pressure in the gas cylinder 7 reaches a certain extent, the piezoelectric ceramic plate 15 positioned between the connecting part 16 and the movable part 13 generates current, the current is transmitted to the alarm module through the connecting part 16, the alarm module can be an alarm 17, and the generation of the current triggers the alarm of the alarm 17.

It should be noted that, can connect gas bomb 7 department at pressure release box 4 and set up check valve 6, check valve 6 guarantees that the high temperature high pressure gas that flows into gas bomb 7 can not flow back to pressure release box 4 in again, and the gas of pressure release box 4 can flow to gas bomb 7 all the time in, and continuous compression movable part 13 is until the initiation is reported to the police, after the initiation is reported to the police, the staff dismantles gas bomb 7 from pressure release box 4, further pressure release.

That is, when the high temperature and high pressure gas does not reach the alarm state, the pressure in the accommodating space 11 can be reduced by the communication between the pressure release box 4 and the gas cylinder 7 and the diversion flow passage 2 and the accommodating space 11, so that the pressure release is completed; and when the high-temperature high-pressure gas is still continuously generated and reaches a preset state and an alarm is triggered, the pressure relief can be completed by disassembling the gas cylinder 7 according to the indication of the alarm module.

In addition, the outside of the alarm 17 is provided with a dust screen 18, which can protect the alarm 17 while preventing dust.

The embodiment of the utility model also discloses a battery, which comprises the battery shell 100, when the lithium battery is in short circuit, the temperature in the lithium battery is suddenly increased, high-temperature and high-pressure gas in the accommodating space 11 flows into the diversion flow channel 2, the high-temperature and high-pressure gas in the diversion flow channel 2 enables the bonding part of the sealing element 9 and the shell body 1 to be cracked and separated, and particularly the bonding separation of the sealing element 9 and the shell body 1 can be realized when the gas temperature and the gas pressure reach a certain value, so that the high-temperature and high-pressure gas in the diversion flow channel 2 flows into the pressure relief box 4 to realize pressure relief in the shell body 1, further the explosion of the battery shell 100 of the lithium battery is prevented, and the service life of the battery is prolonged. 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 utility model, a "first feature" or "second feature" may include one or more of such features.

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, comprising:

the shell comprises a shell body, wherein an accommodating space is formed in the shell body, and a diversion flow passage communicated with the accommodating space is formed in the peripheral wall of the shell body;

the pressure relief structure comprises a sealing element and a pressure relief box, wherein the sealing element is bonded and connected with the shell body, the sealing element is sealed at one end of the diversion flow channel away from the accommodating space, the pressure relief box is connected with the shell body and is provided with a pressure relief flow channel, and the sealing element is arranged to be bonded and separated with the shell body when the temperature in the diversion flow channel is greater than a set value and to enable the diversion flow channel to be communicated with the pressure relief flow channel.

2. The battery case according to claim 1, wherein a hot melt adhesive tape is arranged at the joint of the sealing member and the case body, and the pressure release structure further comprises a heat conduction structure, wherein a part of the heat conduction structure is exposed in the flow guide flow passage, and the other part of the heat conduction structure is connected with the hot melt adhesive tape.

3. The battery case according to claim 2, wherein the heat conducting structure comprises a heat transfer ring and a heat conducting rod, the sealing member is provided with a mounting opening which is opened towards the inside of the flow guide flow channel, the heat transfer ring is mounted in the mounting opening, the heat conducting rod penetrates through the sealing member, and one end of the heat conducting rod is in contact connection with the heat transfer ring and the other end of the heat conducting rod is connected with the hot melt adhesive tape.

4. The battery case according to claim 3, wherein the heat conductive rod comprises a first section, a middle section and a second section, the first section and the second section are spaced apart in parallel and are respectively connected to two ends of the middle section in a bending manner, the first section is connected with the heat transfer ring, and the second section is connected with the hot melt adhesive tape.

5. The battery case according to claim 1, wherein a first elastic member is further provided in the pressure release case, the first elastic member is connected between the sealing member and an inner wall of the pressure release case, and the first elastic member is configured to apply an elastic force to the sealing member toward the case body.

6. The battery case according to claim 1, wherein the flow guide flow passage includes an inner side opening, a main flow passage and an outer side opening, the main flow passage is provided extending in an axial direction of the case body, the inner side opening communicates one end of the main flow passage with the accommodation space, and the pressure release structure is installed at the outer side opening.

7. The battery case according to claim 6, wherein a gas permeable membrane is provided at the inner opening.

8. The battery housing of claim 1, further comprising a gas cylinder having a gas storage chamber disposed therein, the gas cylinder being detachably connected to the pressure relief cartridge, and the gas storage chamber being in communication with the pressure relief flow passage.

9. The battery housing according to claim 8, wherein the gas cylinder is provided with a movable member and an alarm module, the movable member is movably installed in the gas storage cavity, and the movable member is pushed to trigger the alarm module to alarm when the gas pressure in the gas storage cavity is greater than a set value.

10. A battery comprising the battery case according to any one of claims 1 to 9.