CN219739211U - Battery shell, battery monomer, battery and power utilization device - Google Patents

Abstract

The utility model discloses a battery shell, a battery monomer, a battery and an electricity utilization device, wherein the battery shell comprises a shell body and a ventilation valve, the shell body comprises a first wall, and ventilation holes are formed in the first wall; the breather valve is installed in the shell body and is located bleeder vent department, and the breather valve includes valve body and waterproof ventilated membrane, and the valve body is formed with ventilative passageway, ventilative passageway intercommunication bleeder vent and outside, and waterproof ventilated membrane is located in the ventilative passageway. According to the battery shell disclosed by the embodiment of the utility model, when the pressure in the battery shell is overlarge, the internal gas can be discharged to the outside through the ventilation channel, so that the internal and external pressure difference of the battery shell is reduced, and the external liquid or other impurities are difficult to enter the battery shell, so that the safety and reliability of the battery can be improved, the potential safety hazard is reduced, and the influence on the service life of the battery is reduced; in addition, the valve body is located to waterproof ventilated membrane, and valve body and waterproof ventilated membrane can install in the shell body together, have higher assembly efficiency.

Description

Battery shell, battery monomer, battery and power utilization device

Technical Field

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

Background

In the related art, during the use process of the battery, or under the action of external force, gas is generated in the battery, so that the pressure in the battery is increased, the battery is easily inflated, structural members on the battery are damaged, and the service life of the battery is influenced; and the pressure in the battery is increased to a certain degree, so that the battery is easy to explode, and a large potential safety hazard exists.

Disclosure of Invention

The utility model provides a battery shell, a battery monomer, a battery and an electricity utilization device, wherein a waterproof and breathable film is arranged in a breathable channel of a valve body, so that the pressure difference between the inside and the outside of the battery can be reduced, the safety of the battery is improved, and the influence on the service life of the battery is reduced.

In a first aspect, the present utility model provides a battery case comprising: the shell body comprises a first wall, wherein ventilation holes are formed in the first wall; the ventilation valve is arranged on the shell body and located at the ventilation hole, the ventilation valve comprises a valve body and a waterproof ventilation membrane, the valve body is provided with a ventilation channel which is communicated with the ventilation hole and the outside, and the waterproof ventilation membrane is arranged in the ventilation channel.

In the technical scheme, the waterproof ventilation film is arranged in the ventilation channel of the valve body, when the pressure in the battery shell is overlarge, the internal gas can be discharged to the outside through the ventilation channel, so that the internal and external pressure difference of the battery shell is reduced, and external liquid (such as water) or other impurities are difficult to enter the battery shell, so that the safety and reliability of the battery can be improved, the potential safety hazard is reduced, and the influence on the service life of the battery is reduced; in addition, the valve body is located to waterproof ventilated membrane, and valve body and waterproof ventilated membrane can install in the shell body together, have higher assembly efficiency.

In some embodiments, the breather valve is welded to the first wall.

In the technical scheme, the air-permeable valve is welded with the first wall, so that the connection stability between the air-permeable valve and the first wall can be improved, and the connection mode is simpler.

In some embodiments, the peripheral wall of the breather valve is welded to the first wall.

In the technical scheme, through the outer peripheral wall and the first wall welded connection of the ventilation valve, the ventilation valve can be connected with the first wall along the circumferential direction of the ventilation valve, the connection stability between the ventilation valve and the first wall can be further improved, and the operation is convenient.

In some embodiments, the outer surface of the first wall is formed with a positioning groove, the ventilation hole is formed in the bottom wall of the positioning groove, and a portion of the ventilation valve is accommodated in the positioning groove.

In the technical scheme, the ventilation valve can be positioned on the first wall through the part of the ventilation valve accommodated in the positioning groove, so that the stability of the coordination between the ventilation valve and the first wall can be enhanced.

In some embodiments, the outer peripheral wall of the breather valve is welded to the inner peripheral wall of the locating groove.

In the technical scheme, through the welding connection of the outer peripheral wall of the ventilation valve and the inner peripheral wall of the positioning groove, the stability of the coordination between the ventilation valve and the positioning groove can be further enhanced, the stability of the connection between the ventilation valve and the first wall is improved, and the operation is convenient.

In some embodiments, the ventilation valve has a guide portion received in the ventilation hole, and a portion of the ventilation passage is formed in the guide portion.

In the technical scheme, the guide part of the ventilation valve is accommodated in the ventilation hole, so that the ventilation valve can be positioned on the first wall, the ventilation valve is mounted on the first wall in a guiding way, and the ventilation valve is convenient to mount.

In some embodiments, the guide portion is formed in a ring-shaped structure extending in a circumferential direction of the airing hole.

In the above technical scheme, the guide part is formed into an annular structure extending along the circumferential direction of the ventilation hole, so that the ventilation valve is conveniently assembled on the first wall, and gas can conveniently circulate between the ventilation hole and the ventilation channel.

In some embodiments, the valve body includes a valve base and a valve cover, the valve base is connected with the first wall, the valve cover and the valve base define a ventilation cavity together, a communication hole for communicating the ventilation cavity with the ventilation hole is formed in the valve base, a ventilation hole for communicating the ventilation cavity with the outside is formed in the valve cover, the waterproof ventilation film is located in the ventilation cavity and covers the communication hole, and the ventilation channel includes the ventilation cavity, the communication hole and the ventilation hole.

In the technical scheme, the gas in the battery can enter the ventilation cavity through the ventilation holes, the communication holes and the waterproof ventilation film, and the gas in the ventilation cavity can be discharged to the outside through the ventilation holes; the external gas can also enter the ventilation cavity through the vent hole, and the gas entering the ventilation cavity can enter the battery through the waterproof ventilation film, the communication hole and the vent hole, so that the internal and external pressure difference of the battery can be reduced.

In some embodiments, the waterproof breathable membrane is mounted to the valve base.

In the technical scheme, the waterproof breathable film is arranged on the valve base, so that the installation stability of the waterproof breathable film can be enhanced, and the waterproof breathable film can better realize the waterproof breathable function.

In some embodiments, the valve base is formed with a receiving groove that constitutes part of the ventilation chamber, the communication hole is formed in a bottom wall of the receiving groove, and the waterproof ventilation membrane is located in the receiving groove and mounted to the bottom wall of the receiving groove.

In the technical scheme, the waterproof breathable film is positioned in the accommodating groove and is arranged on the bottom wall of the accommodating groove, so that the installation stability of the waterproof breathable film can be further enhanced; the communication hole is formed in the bottom wall of the accommodating groove, gas can circulate between the communication hole and the ventilation cavity, and the waterproof ventilation membrane can intercept liquid in the ventilation cavity.

In some embodiments, the valve cover includes a cover body cover provided at an open side of the receiving groove, and a fitting portion received in the receiving groove and in contact-fit with an inner circumferential wall of the receiving groove, the vent hole being formed in the cover body.

In the technical scheme, the valve cover and the valve base are matched with each other through the contact of the matching part and the inner peripheral wall of the accommodating groove, so that the stability of the structure of the poppet valve body is improved.

In some embodiments, the mating portion presses against a surface of the waterproof breathable membrane that is distal from the bottom wall of the receiving groove.

In the above technical scheme, the bottom wall of cooperation portion and holding tank supports jointly presses waterproof ventilated membrane, can further promote the stability of waterproof ventilated membrane at this internal installation of valve, reduces the possibility of waterproof ventilated membrane activity in the holding tank for waterproof ventilated membrane realizes waterproof ventilative function better.

In some embodiments, the vent holes are a plurality of, and the plurality of vent holes are arranged at intervals along the circumference of the valve cover.

In the technical scheme, the plurality of vent holes are arranged at intervals along the circumferential direction of the valve cover, so that the air in the ventilation channel can be more conveniently discharged to the outside, and the pressure difference between the inside and the outside of the battery can be reduced more quickly.

In some embodiments, the valve cover is removably connected to the valve base.

In the technical scheme, the valve cover is detachably connected with the valve base, so that the valve cover can be conveniently detached from the valve base, and the valve cover can be replaced and maintained; when the waterproof breathable film fails, the waterproof breathable film in the breathable cavity is also convenient to replace.

In some embodiments, the outer surface of the first wall is formed with a positioning groove, the ventilation hole is formed in the bottom wall of the positioning groove, a part of the valve base is accommodated in the positioning groove, and the valve base is welded with the first wall.

In the above technical solution, the valve seat can be positioned on the first wall by the portion of the valve seat being accommodated in the positioning groove; through valve base and first wall welded connection, can improve the connection stability of valve base and first wall to can improve the connection stability of ventilation valve and first wall.

In some embodiments, the valve base includes a base body and a guide portion provided to the base body, a portion of the communication hole is formed in the base body and another portion is formed in the guide portion, and the guide portion is accommodated in the ventilation hole.

In the above technical scheme, hold in the bleeder vent through the guide for the valve base is located first wall, and makes intercommunicating pore and bleeder vent intercommunication, and the gas of convenience circulates between intercommunicating pore and bleeder vent.

In some embodiments, the housing body includes a housing main body and an end cover, one side of the housing main body is open, the end cover is provided at the open end of the housing main body, and the first wall is an end cover.

In the above technical solution, the end cover is covered at the open end of the casing body, so that the components (such as the pole group) in the casing body can be protected; when the pressure in the battery shell is overlarge, the gas in the battery shell can be discharged to the outside through the ventilation holes in the end cover and the ventilation channels in the ventilation valve, so that the internal and external pressure difference of the battery shell is reduced, and the potential safety hazard is reduced.

In a second aspect, the present utility model proposes a battery cell comprising: a battery case according to the embodiment of the first aspect; and the pole group is arranged in the battery shell.

In the technical scheme, by adopting the battery monomer, the waterproof breathable film is arranged in the breathable channel of the valve body, when the pressure in the battery shell is overlarge, the internal gas can be discharged to the outside through the breathable channel, so that the internal and external pressure difference of the battery shell is reduced, and external liquid (such as water) or other impurities are difficult to enter the battery shell, so that the safety and reliability of the battery can be improved, the potential safety hazard is reduced, and the influence on the service life of the battery is reduced; in addition, the valve body is located to waterproof ventilated membrane, and valve body and waterproof ventilated membrane can install in the shell body together, have higher assembly efficiency.

In a third aspect, the present utility model provides a battery comprising: the battery cell described above.

In the technical scheme, by adopting the battery monomer, the waterproof breathable film is arranged in the breathable channel of the valve body, when the pressure in the battery shell is overlarge, the internal gas can be discharged to the outside through the breathable channel, so that the pressure difference between the inside and the outside of the battery is reduced, and external liquid (such as water) or other impurities are difficult to enter the battery shell, so that the safety and the reliability of the battery can be improved, the potential safety hazard is reduced, and the influence on the service life of the battery is reduced; in addition, the valve body is located to waterproof ventilated membrane, and valve body and waterproof ventilated membrane can install in the shell body together, have higher assembly efficiency.

In a fourth aspect, the present utility model provides an electrical device, comprising: the battery described above.

In the technical scheme, by adopting the battery, the waterproof breathable film is arranged in the breathable channel of the valve body, when the pressure in the battery shell is overlarge, the internal gas can be discharged to the outside through the breathable channel, so that the internal and external pressure difference of the battery shell is reduced, and external liquid (such as water) or other impurities are difficult to enter the battery shell, so that the safety and reliability of the battery can be improved, the potential safety hazard is reduced, and the influence on the service life of the battery is reduced; in addition, the valve body is located to waterproof ventilated membrane, and valve body and waterproof ventilated membrane can install in the shell body together, have higher assembly efficiency.

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 view of a gas-permeable valve according to some embodiments of the present utility model mounted to a first wall;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 2;

FIG. 4 is a schematic view of the structure of the ventilation valve of FIG. 1;

FIG. 5 is an exploded view of the ventilation valve of FIG. 4;

FIG. 6 is a schematic view of the ventilation valve of FIG. 4 at another angle;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 8 is a schematic view of the first wall of FIG. 1;

FIG. 9 is a schematic diagram of a battery according to some embodiments of the utility model;

fig. 10 is a schematic diagram of an electrical device according to some embodiments of the utility model.

Reference numerals:

1000. an electric device;

100. a battery; 1. a first wall; 11. a positioning groove; 111. an inner peripheral wall; 12. ventilation holes; 13. a through hole;

2. a ventilation valve; 201. an outer peripheral wall; 20. a valve body; 21. a valve base; 211. a base body; 212. a guide part; 213. a communication hole; 214. a receiving groove; 22. a valve cover; 220. a cover main body; 221. a vent hole; 222. a mating portion; 23. a ventilation chamber; 24. a waterproof breathable film; 25. and a ventilation channel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present utility model is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present utility model, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present utility model, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the utility model shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the utility model in any way.

The term "plurality" as used herein means two or more (including two).

In the present utility model, the battery 100 refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery 100 referred to in the present utility model may include a battery cell, a battery module, a battery pack, or the like. Some batteries 100 may include a case for enclosing one or more battery cells or a plurality of battery modules, and the case may include a top plate and a bottom plate. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells. Of course, some of the batteries 100 may be directly disposed in the battery installation compartment of the power utilization device without the above-described case.

In the present utility model, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiment of the present utility model. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the utility model. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this embodiment.

In the related art, during the use process of the battery, or under the action of external force, gas is generated in the battery, so that the pressure in the battery is increased, the battery is easily inflated, structural members on the battery are damaged, and the service life of the battery is influenced; and the pressure in the battery is increased to a certain degree, so that the battery is easy to explode, and a large potential safety hazard exists.

Based on this, the applicant proposes a battery case comprising a case body including a first wall 1, the first wall 1 being formed with ventilation holes 12, and a ventilation valve 2; the breather valve 2 is installed in the shell body and is located bleeder vent 12 department, and breather valve 2 includes valve body 20 and waterproof ventilated membrane 24, and valve body 20 is formed with ventilation channel 25, and ventilation channel 25 intercommunication bleeder vent 12 and outside, waterproof ventilated membrane 24 locate in ventilation channel 25.

In the battery case with the structure, the waterproof and breathable film 24 is arranged in the breathable channel 25 of the valve body 20, when the pressure in the battery case is overlarge, the internal gas can be discharged to the outside through the breathable channel 25, so that the internal and external pressure difference of the battery case is reduced, and external liquid (such as water) or other impurities are difficult to enter the battery case, so that the safety and reliability of the battery can be improved, the potential safety hazard is reduced, and the influence on the service life of the battery is reduced; in addition, the waterproof and breathable film 24 is arranged on the valve body 20, and the valve body 20 and the waterproof and breathable film 24 can be installed on the shell body together, so that the assembly efficiency is high.

The battery disclosed by the embodiment of the utility model can be used in electric equipment such as vehicles, ships or aircrafts, and the like, and can be provided with a power supply system comprising the battery and the like disclosed by the utility model, so that the use safety and reliability of the electric equipment are ensured.

For example, the power device disclosed in the embodiment of the utility model can be, but is not limited to, a vehicle, a mobile phone, a tablet, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle, a new energy vehicle or a railway vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended range vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric vehicle toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others.

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

Referring to fig. 1 to 5, in a first aspect, the present utility model provides a battery case comprising: the air-permeable valve comprises a shell body and an air-permeable valve 2, wherein the shell body comprises a first wall 1, and the first wall 1 is provided with an air-permeable hole 12; the breather valve 2 is installed in the shell body and is located bleeder vent 12 department, and breather valve 2 includes valve body 20 and waterproof ventilated membrane 24, and valve body 20 is formed with ventilation channel 25, and ventilation channel 25 intercommunication bleeder vent 12 and outside, waterproof ventilated membrane 24 locate in ventilation channel 25.

It is understood that the waterproof and breathable film 24 has a breathable function and a waterproof function, and the waterproof and breathable film 24 allows gas molecules to pass through the breathable channels 25, while liquid, dust, and the like are difficult to pass through the breathable channels 25.

In the above technical solution, the waterproof and breathable film 24 is disposed in the breathable channel 25 of the valve body 20, when the pressure in the battery housing is too high, the internal gas can be discharged to the outside through the breathable channel 25, so as to reduce the internal and external pressure difference of the battery housing, and the external liquid (such as water) or other impurities are difficult to enter the battery housing, so that the safety and reliability of the battery can be improved, the potential safety hazard can be reduced, and the influence on the service life of the battery can be reduced; in addition, the waterproof and breathable film 24 is arranged on the valve body 20, and the valve body 20 and the waterproof and breathable film 24 can be installed on the shell body together, so that the assembly efficiency is high.

In some embodiments, referring to fig. 3, the ventilation valve 2 is welded to the first wall 1.

In the above technical scheme, through the welded connection of the ventilation valve 2 and the first wall 1, the connection stability between the ventilation valve 2 and the first wall 1 can be improved, and the connection mode is simpler.

In some embodiments, referring to fig. 3, the peripheral wall 201 of the ventilation valve 2 is welded to the first wall 1.

For example, the outer peripheral wall of the ventilation valve 2 may be welded to the first wall 1 by means of laser ring welding.

In the above technical scheme, through the peripheral wall 201 and the first wall 1 welded connection of ventilation valve 2, can be along ventilation valve 2's circumference with ventilation valve 2 and first wall 1 are connected, can further improve the connection stability between ventilation valve 2 and the first wall 1 to convenient operation.

In some embodiments, referring to fig. 3 to 8, the outer surface of the first wall 1 is formed with a positioning groove 11, the ventilation holes 12 are formed at the bottom wall of the positioning groove 11, and a portion of the ventilation valve 2 is accommodated in the positioning groove 11.

In the above technical solution, the air-permeable valve 2 can be positioned on the first wall 1 by partially accommodating the air-permeable valve 2 in the positioning groove 11, so that the stability of the cooperation between the air-permeable valve 2 and the first wall 1 can be enhanced.

In some embodiments, referring to fig. 3, the outer circumferential wall 201 of the ventilation valve 2 is welded with the inner circumferential wall 111 of the positioning groove 11.

In the above technical scheme, through the welding connection of the outer peripheral wall 201 of the ventilation valve 2 and the inner peripheral wall 111 of the positioning groove 11, the stability of the cooperation between the ventilation valve 2 and the positioning groove 11 can be further enhanced, the stability of the connection between the ventilation valve 2 and the first wall 1 is improved, and the operation is convenient.

In some embodiments, referring to fig. 3, the ventilation valve 2 has a guide 212, the guide 212 is received in the ventilation hole 12, and a portion of the ventilation channel 25 is formed in the guide 212.

In the above technical scheme, the guide portion 212 of the ventilation valve 2 is accommodated in the ventilation hole 12, so that the ventilation valve 2 can be positioned on the first wall 1, the installation of the ventilation valve 2 on the first wall 1 is guided, and the installation of the ventilation valve 2 is facilitated.

In some embodiments, referring to fig. 3 to 7, the guide 212 is formed in a ring-shaped structure extending in the circumferential direction of the airing hole 12.

In the above-described solution, the guide portion 212 is formed in a ring-shaped structure extending along the circumferential direction of the airing hole 12, not only to facilitate the assembly of the airing valve 2 to the first wall 1, but also to facilitate the circulation of air between the airing hole 12 and the airing channel 25.

In some embodiments, referring to fig. 3 to 7, the valve body 20 includes a valve base 21 and a valve cover 22, the valve base 21 is connected to the first wall 1, the valve cover 22 and the valve base 21 define a ventilation chamber 23 together, a communication hole 213 communicating the ventilation chamber 23 with the ventilation hole 12 is formed in the valve base 21, a ventilation hole 221 communicating the ventilation chamber 23 with the outside is formed in the valve cover 22, a waterproof ventilation film 24 is located in the ventilation chamber 23 and covers the communication hole 213, and the ventilation channel 25 includes the ventilation chamber 23, the communication hole 213, and the ventilation hole 221.

In the above technical solution, the gas in the battery may enter the ventilation chamber 23 through the ventilation holes 12, the communication holes 213, and the waterproof ventilation film 24, and the gas in the ventilation chamber 23 may be discharged to the outside through the ventilation holes 221; the external gas can also enter the ventilation cavity 23 through the ventilation holes 221, and the gas entering the ventilation cavity 23 can enter the battery through the waterproof ventilation membrane 24, the communication holes 213 and the ventilation holes 12, so that the pressure difference between the inside and the outside of the battery can be reduced.

In some embodiments, referring to fig. 3-7, a waterproof, breathable membrane 24 is mounted to valve base 21.

In the above technical scheme, install in valve base 21 through waterproof ventilated membrane 24, can strengthen waterproof ventilated membrane 24's installation stability for waterproof ventilated membrane 24 realizes waterproof ventilative function better.

In some embodiments, referring to fig. 3-7, the valve base 21 is formed with a receiving groove 214, the receiving groove 214 constitutes part of the ventilation chamber 23, a communication hole 213 is formed in the bottom wall of the receiving groove 214, and a waterproof ventilation membrane 24 is located in the receiving groove 214 and mounted to the bottom wall of the receiving groove 214.

In the above technical solution, the waterproof and breathable film 24 is located in the accommodating groove 214 and is mounted on the bottom wall of the accommodating groove 214, so that the mounting stability of the waterproof and breathable film 24 can be further enhanced; the communication hole 213 is formed at the bottom wall of the accommodation groove 214, gas can circulate between the communication hole 213 and the ventilation chamber 23, and the waterproof ventilation film 24 can intercept liquid in the ventilation chamber 23.

In some embodiments, referring to fig. 4 to 7, the cover 22 includes a cover body 220 and a fitting portion 222, the cover body 220 is provided to cover an open side of the receiving groove 214, the fitting portion 222 is received in the receiving groove 214, and the fitting portion 222 is in contact with an inner circumferential wall of the receiving groove 214, and the vent hole 221 is formed in the cover body 220.

In the above-described technical solution, the fitting portion 222 is in contact fit with the inner peripheral wall of the accommodating groove 214, so that the stability of the fitting of the valve cover 22 and the valve base 21 can be improved, and the stability of the structure of the poppet valve body 20 can be improved.

In some embodiments, referring to fig. 3-7, the mating portion 222 presses against a surface of the waterproof breathable membrane 24 that is distal from the bottom wall of the receiving groove 214.

In the above technical solution, the bottom walls of the fitting portion 222 and the accommodating groove 214 are pressed against the waterproof and breathable film 24 together, so that the stability of the waterproof and breathable film 24 in the valve body 20 can be further improved, the possibility of the waterproof and breathable film 24 moving in the accommodating groove 214 is reduced, and the waterproof and breathable film 24 can better realize the waterproof and breathable functions.

In some embodiments, referring to fig. 4 and 5, the vent holes 221 are a plurality of, and the plurality of vent holes 221 are spaced apart along the circumference of the valve cover 22.

In the above technical solution, the plurality of ventilation holes 221 are arranged at intervals along the circumferential direction of the valve cover 22, so that when the pressure in the battery is too high, the gas in the ventilation channel 25 can be more conveniently discharged to the outside, and the pressure difference between the inside and the outside of the battery can be reduced more quickly.

In some embodiments, referring to fig. 5, the valve cover 22 is removably attached to the valve base 21.

For example, the valve cover 22 and valve base 21 may be an interference fit; alternatively, the valve cover 22 and the valve base 21 may be snap-fit.

In the above technical solution, the valve cover 22 is detachably connected with the valve base 21, so that the valve cover 22 can be conveniently detached from the valve base 21, and the valve cover 22 can be replaced and maintained; when the waterproof and breathable film 24 fails, the waterproof and breathable film 24 in the breathable cavity 23 is also convenient to replace.

In some embodiments, referring to fig. 3, the outer surface of the first wall 1 is formed with a positioning groove 11, the ventilation holes 12 are formed at the bottom wall of the positioning groove 11, a portion of the valve base 21 is received in the positioning groove 11, and the valve base 21 is welded to the first wall 1.

For example, the outer peripheral wall of the valve seat 21 and the inner peripheral wall of the positioning groove 11 are ring-welded by laser.

In the above-described technical solution, the valve seat 21 can be positioned on the first wall 1 by the portion of the valve seat 21 being accommodated in the positioning groove 11; by welding the valve base 21 to the first wall 1, the connection stability between the valve base 21 and the first wall 1 can be improved, and the connection stability between the ventilation valve 2 and the first wall 1 can be improved.

In some embodiments, referring to fig. 3, the valve base 21 includes a base body 211 and a guide 212, the guide 212 is provided to the base body 211, a portion of the communication hole 213 is formed in the base body 211, and another portion of the communication hole 213 is formed in the guide 212, and the guide 212 is received in the ventilation hole 12.

In the above-described aspect, the valve base 21 is positioned at the first wall 1 by the guide 212 being received in the vent hole 12, and the communication hole 213 is communicated with the vent hole 12, so that the gas can flow between the communication hole 213 and the vent hole 12.

In some embodiments, the housing body includes a housing main body and an end cover, one side of the housing main body is open, the end cover is provided at the open end of the housing main body, and the first wall 1 is the end cover.

In other embodiments of the utility model, the first wall 1 may be any wall portion of the housing body.

In the above technical solution, the end cover is covered at the open end of the casing body, so that the components (such as the pole group) in the casing body can be protected; when the pressure in the battery case is too high, the gas in the battery case can be discharged to the outside through the ventilation holes 12 on the end cover and the ventilation channels 25 in the ventilation valve 2, so that the pressure difference between the inside and the outside of the battery case is reduced, and the potential safety hazard is reduced.

In a second aspect, the present utility model proposes a battery cell comprising: a battery case and a pole group, wherein the battery case is the battery case of the embodiment of the first aspect; the pole group is arranged in the battery shell.

In the above technical solution, by adopting the above battery case, the waterproof and breathable film 24 is disposed in the breathable channel 25 of the valve body 20, when the pressure in the battery case is too high, the internal gas can be discharged to the outside through the breathable channel 25, so as to reduce the internal and external pressure difference of the battery case, and the external liquid (such as water) or other impurities are difficult to enter the battery case, so that the safety and reliability of the battery can be improved, the potential safety hazard can be reduced, and the influence on the service life of the battery can be reduced; in addition, the waterproof and breathable film 24 is arranged on the valve body 20, and the valve body 20 and the waterproof and breathable film 24 can be installed on the shell body together, so that the assembly efficiency is high.

In a third aspect, referring to fig. 9, the present utility model proposes a battery 100 comprising: the battery cell described above.

In the above technical solution, by adopting the above battery monomer, the waterproof and breathable film 24 is disposed in the breathable channel 25 of the valve body 20, when the pressure in the battery case is too high, the internal gas can be discharged to the outside through the breathable channel 25, so as to reduce the internal and external pressure difference of the battery case, and the external liquid (such as water) or other impurities are difficult to enter the battery case, so that the safety and reliability of the battery can be improved, the potential safety hazard can be reduced, and the influence on the service life of the battery can be reduced; in addition, the waterproof and breathable film 24 is arranged on the valve body 20, and the valve body 20 and the waterproof and breathable film 24 can be installed on the shell body together, so that the assembly efficiency is high.

Fourth aspect, referring to fig. 10, the present utility model proposes an electric device 1000, comprising: the battery 100 described above.

The battery 100 may supply electric power to the electric device 1000, for example, referring to fig. 10, the electric device 1000 may supply electric power to a vehicle, the battery 100 may supply electric power to the vehicle, and the battery 100 may serve as a driving power source of the vehicle to supply driving force to the vehicle.

By adopting the battery 100, the waterproof and breathable film 24 is arranged in the breathable channel 25 of the valve body 20, when the pressure in the battery shell is overlarge, the internal gas can be discharged to the outside through the breathable channel 25, so that the internal and external pressure difference of the battery shell is reduced, and external liquid (such as water) or other impurities are difficult to enter the battery shell, so that the safety and reliability of the battery can be improved, the potential safety hazard is reduced, and the influence on the service life of the battery is reduced; in addition, the waterproof and breathable film 24 is arranged on the valve body 20, and the valve body 20 and the waterproof and breathable film 24 can be installed on the shell body together, so that the assembly efficiency is high.

In some embodiments of the present utility model, referring to fig. 1-8, a battery cell includes a battery housing and a pole set disposed within the battery housing. The battery case includes shell body and breather valve 2, and the shell body includes casing main part and end cover, and one side of casing main part is opened, and the open end of casing main part is located to the end cover lid. The shell body comprises a first wall 1, the first wall 1 is an end cover, a positioning groove 11 is formed on the outer surface of the first wall 1, an air vent 12 is formed in the bottom wall of the positioning groove 11, and an air vent valve 2 is arranged on the first wall 1 and located at the air vent 12; the first wall 1 is also formed with two through holes 13 arranged at intervals, and the pole is suitable for penetrating the through holes 13 of the first wall 1.

The ventilation valve 2 comprises a valve body 20 and a waterproof ventilation membrane 24, the valve body 20 is provided with a ventilation channel 25, the ventilation channel 25 is communicated with the ventilation holes 12 and the outside, and the waterproof ventilation membrane 24 is arranged in the ventilation channel 25. The valve body 20 comprises a valve base 21 and a valve cover 22, the valve cover 22 is in interference fit with the valve base 21, the valve cover 22 and the valve base 21 jointly define a ventilation cavity 23, the ventilation cavity 23 is a part of a ventilation channel 25, and a waterproof ventilation membrane 24 is located in the ventilation cavity 23.

The valve base 21 includes a base body 211 and a guide portion 212, the base body 211 is accommodated in the positioning groove 11, and an outer peripheral wall 201 of the base body 211 is connected with an inner peripheral wall 111 of the positioning groove 11 by laser ring welding to weld-connect the valve base 21 with the first wall 1. The guide portion 212 is formed in a ring-shaped structure extending in the circumferential direction of the airing hole 12, the guide portion 212 is received in the airing hole 12, and a portion of the airing passage 25 is formed in the guide portion 212.

The valve base 21 is formed with a receiving groove 214, a communication hole 213 is formed in the bottom wall of the receiving groove 214, a waterproof and breathable film 24 is positioned in the receiving groove 214 and is mounted on the bottom wall of the receiving groove 214, and the waterproof and breathable film 24 covers the communication hole 213. A portion of the communication hole 213 is formed in the base body 211, and another portion of the communication hole 213 is formed in the guide 212, the communication hole 213 being a portion of the ventilation passage 25.

The cover 22 includes a cover main body 220 and an engaging portion 222, the cover main body 220 is provided on the open side of the accommodation groove 214, a vent hole 221 for communicating the ventilation chamber 23 with the outside is formed in the cover main body 220, and the vent hole 221 is a part of the ventilation passage 25. The vent holes 221 are formed in the side wall of the cover main body 220, and the vent holes 221 are provided in a plurality of spaced apart positions along the circumferential direction of the valve cover 22. The fitting portion 222 is accommodated in the accommodation groove 214, and the fitting portion 222 is in contact fit with the inner peripheral wall of the accommodation groove 214, and the fitting portion 222 is pressed against the surface of the waterproof breathable film 24 away from the bottom wall of the accommodation groove 214.

In the above technical solution, the waterproof and breathable film 24 is disposed in the breathable channel 25 of the valve body 20, when the pressure in the battery case is too high, the internal gas can be discharged to the outside through the breathable channel 25, so as to reduce the internal and external pressure difference of the battery case, and the external liquid or other impurities are difficult to enter the battery case, so that the safety and reliability of the battery can be improved, the potential safety hazard can be reduced, and the influence on the service life of the battery can be reduced; in addition, the waterproof and breathable film 24 is arranged on the valve body 20, and the valve body 20 and the waterproof and breathable film 24 can be installed on the shell body 1 together, so that the assembly efficiency is high.

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 (20)

1. A battery case, comprising:

the shell body comprises a first wall, wherein ventilation holes are formed in the first wall;

the ventilation valve is arranged on the shell body and located at the ventilation hole, the ventilation valve comprises a valve body and a waterproof ventilation membrane, the valve body is provided with a ventilation channel which is communicated with the ventilation hole and the outside, and the waterproof ventilation membrane is arranged in the ventilation channel.

2. The battery housing of claim 1, wherein the vent valve is welded to the first wall.

3. The battery housing of claim 2, wherein the peripheral wall of the vent valve is welded to the first wall.

4. The battery case according to claim 1, wherein the outer surface of the first wall is formed with a positioning groove, the ventilation hole is formed in a bottom wall of the positioning groove, and a portion of the ventilation valve is accommodated in the positioning groove.

5. The battery case according to claim 4, wherein an outer peripheral wall of the air-permeable valve is welded to an inner peripheral wall of the positioning groove.

6. The battery case according to claim 1, wherein the vent valve has a guide portion that is received in the vent hole, and a portion of the vent passage is formed in the guide portion.

7. The battery case according to claim 6, wherein the guide portion is formed in a ring-shaped structure extending in a circumferential direction of the vent hole.

8. The battery case according to claim 1, wherein the valve body includes a valve base and a valve cover, the valve base is connected to the first wall, the valve cover and the valve base define a ventilation chamber together, a communication hole communicating the ventilation chamber with the ventilation hole is formed in the valve base, a ventilation hole communicating the ventilation chamber with the outside is formed in the valve cover, the waterproof ventilation film is located in the ventilation chamber and covers the communication hole, and the ventilation passage includes the ventilation chamber, the communication hole, and the ventilation hole.

9. The battery housing of claim 8, wherein the waterproof breathable membrane is mounted to the valve base.

10. The battery case according to claim 9, wherein the valve base is formed with a receiving groove that constitutes a portion of the ventilation chamber, the communication hole is formed in a bottom wall of the receiving groove, and the waterproof ventilation film is located in and mounted to the receiving groove.

11. The battery case according to claim 10, wherein the valve cover includes a cover main body that is provided to cover an open side of the accommodation groove, and a fitting portion that is accommodated in the accommodation groove and is in contact-fit with an inner peripheral wall of the accommodation groove, the vent hole being formed in the cover main body.

12. The battery case according to claim 11, wherein the fitting portion is pressed against a surface of the waterproof breathable film remote from the bottom wall of the accommodation groove.

13. The battery housing of claim 8, wherein the vent holes are a plurality of, the plurality of vent holes being spaced apart along the circumference of the valve cover.

14. The battery housing of claim 8, wherein the valve cover is removably connected to the valve base.

15. The battery case according to claim 8, wherein the outer surface of the first wall is formed with a positioning groove, the ventilation hole is formed in a bottom wall of the positioning groove, a portion of the valve base is accommodated in the positioning groove, and the valve base is welded to the first wall.

16. The battery case according to claim 8, wherein the valve base includes a base body and a guide portion provided to the base body, a portion of the communication hole is formed in the base body and another portion is formed in the guide portion, and the guide portion is accommodated in the vent hole.

17. The battery housing of any one of claims 1-16, wherein the housing body comprises a housing body and an end cap, one side of the housing body being open, the end cap being provided at the open end of the housing body, the first wall being an end cap.

18. A battery cell, comprising:

a battery case according to any one of claims 1 to 17;

and the pole group is arranged in the battery shell.

19. A battery, comprising: the battery cell of claim 18.

20. An electrical device, comprising: the battery of claim 19.