CN218274802U - Battery and power consumption device - Google Patents

Abstract

The present application relates to a battery (10) and a power consumption device, wherein the battery (10) includes: the box body assembly (1) comprises a box body (11) and a cover body (12), wherein the box body (11) comprises a bottom wall (111) and a plurality of side walls (112) connected to the bottom wall (111), the end parts, far away from the bottom wall (111), of the side walls (112) are enclosed to form an opening (11 '), and the cover body (12) is used for closing the opening (11'); the battery monomer (2) is arranged in the box body component (1); and a thermal insulator (3) provided between the case assembly (1) and the battery cell (2). When the battery works in a low-temperature environment, hot air around the battery monomer can be prevented from directly contacting with a box body assembly with lower temperature to carry out heat exchange, cold and hot temperature difference is reduced, air in the box body assembly is reduced to produce condensed water under the condensation effect, the problem that the condensed water flows to the battery monomer to cause insulation failure is reduced, the probability of short circuit or high-voltage ignition is reduced, and the working safety of the battery is improved.

Description

Battery and power consumption device

Technical Field

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

Background

Because lithium ion batteries have the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, the lithium ion batteries are widely applied to electric automobiles.

However, it has been a problem in the industry to improve the safety of batteries in electric vehicles during use.

SUMMERY OF THE UTILITY MODEL

The purpose of the present application is to improve the safety of a battery.

According to a first aspect of the present application, there is provided a battery comprising:

the box body assembly comprises a box body and a cover body, the box body comprises a bottom wall and a plurality of side walls connected to the bottom wall, the end parts, far away from the bottom wall, of the side walls are enclosed to form an opening, and the cover body is used for sealing the opening;

the battery monomer is arranged in the box body component; and

and the thermal insulation piece is arranged between the box body assembly and the battery monomer.

According to the embodiment, the thermal insulation piece is arranged between the box body assembly and the battery monomer, so that when the battery works in a low-temperature environment, hot air around the battery monomer can be prevented from directly contacting with the box body assembly with a lower temperature to exchange heat, the cold-hot temperature difference is reduced, and the generation of condensed water under the condensation action of the air in the box body assembly is reduced; also, the thermal insulator occupies a gap between the case assembly and the battery cell, thereby further reducing the generation of condensed water. Therefore, the problem of insulation failure caused by the fact that condensed water flows to the battery monomer can be reduced, the probability of short circuit or high-voltage ignition is reduced, and therefore safety of the battery in the working process is improved.

In some embodiments, at least a portion of an outer surface of the thermal insulator conforms to an inner surface of the tank assembly.

This embodiment can play better location effect to thermal insulation through the internal surface of box subassembly, prevents that thermal insulation from taking place to rock or misplace in the box subassembly, prescribes a limit to the formation area of comdenstion water reliably in the specific position, prevents that the comdenstion water from flowing wantonly and causing the insulating inefficacy of battery monomer, reduces the probability that takes place short circuit or high pressure and strike sparks to improve the security in the battery working process. Moreover, the thermal insulation part is attached to the inner surface of the box body assembly, so that condensed water generated on the inner wall of the box body assembly can be reduced, the condensed water is prevented from flowing along the inner surface of the box body assembly and being gathered to a non-insulation area at the bottom of the battery monomer, and the safety of the battery in the working process can be further improved.

In some embodiments, a thermal insulator is disposed between the sidewall and the battery cell.

In the embodiment, the thermal insulation member is arranged between the side wall and the single battery, so that the space between the side wall and the single battery can be fully utilized, the effect of reducing the generation of condensed water is achieved on the basis of not increasing the whole volume of the battery, and the thermal insulation member occupies part of the space between the side wall and the single battery, so that the generation of the condensed water can be further reduced; in addition, the increase of the assembly difficulty of the battery monomer can be avoided.

In some embodiments, the thermal insulator is closed along the outer peripheral side of the battery cell located therein.

The thermal insulation member in the embodiment is designed to be an integral structure, so that the thermal insulation member is convenient to mount, and the assembly efficiency of the battery is improved; moreover, the battery cell can be loaded from the thermal insulation piece towards the open end of the top wall and is bonded with the bottom wall, so that the battery cell is convenient to install.

In some embodiments, the thermal insulator includes a first portion having a gap with the battery cell.

This embodiment makes to have the clearance between first portion and the battery monomer, is convenient for at the inboard installation battery monomer of thermal insulation spare, avoids first portion all to cause the assembly difficulty with the battery monomer zero clearance on whole extension length, can reduce the assembly difficulty from this to prevent that the battery monomer from rubbing between the thermal insulation spare and causing the damage when the assembly, for example insulation failure etc. can guarantee the assembly quality of battery.

In some embodiments, the thermal insulator further includes a protrusion, a first end of the protrusion is connected to the inner side surface of the first portion, and a second end of the protrusion abuts against the battery cell.

The thermal insulation part of this embodiment can play the positioning role to the free installation of battery through set up the arch on the medial surface of first portion, easily accurately confirms the free mounted position of battery, can reduce the assembly degree of difficulty, improves the assembly efficiency of battery.

In some embodiments, the protrusion is provided at a region of the first portion near the bottom wall.

This embodiment can make on the arch provides the basis of location to the free installation of battery, further prevents more heat-conducting glue to spill over to the free side of battery, reduces and distributes in great area and increase the radiating effect through heat-conducting glue, makes the battery satisfy the demand of low temperature work better.

In some embodiments, the battery further includes a moisture absorbing member disposed at an inner side of the thermal insulating member and configured to absorb moisture within the case assembly.

This embodiment sets up moisture absorbing spare through the medial surface at thermal insulation, can absorb a small amount of comdenstion water that produces between thermal insulation and the battery monomer, keeps the battery monomer in dry operational environment, prevents that a small amount of comdenstion water from gathering and flowing to the battery monomer bottom, can guarantee the free insulating properties of battery, reduces the probability that takes place short circuit or high pressure and strike sparks to improve the security in the battery working process.

In some embodiments, the tank assembly is provided with a drain hole, the thermal insulator comprises a first portion and a second portion, the second portion has a lower thermal insulation capacity than the first portion, a first end of the second portion is connected to a top end of the first portion, and the second portion is configured to guide condensed water in the tank assembly to the drain hole.

The second part is arranged at the top end of the first part, so that condensed water formed between the second part and the box body assembly can be guided to the drain hole to be drained out of the box body assembly, the box does not need to be opened to remove water in the process of using the battery for a long time, and the maintenance cost can be reduced.

In some embodiments, the thickness of the second portion is less than the thickness of the first portion.

This embodiment makes second portion attenuate gradually from first end to second end thickness, can increase the volume in condensation chamber, can improve the storage capacity of comdenstion water, can be convenient for again when assembling battery monomer outwards remove the second end of second portion through external force to pack into battery monomer smoothly, reduce the assembly degree of difficulty. Moreover, the structure that the thickness is reduced can enable the second portion and the first portion to be made of the same material and integrally formed, and the processing difficulty of the thermal insulation piece is reduced.

In some embodiments, the second end of the second portion extends toward the cover and abuts against the battery cell.

This embodiment makes the second end of second portion support and leans on in battery monomer, not only can improve the stability of second portion, prevents that the position dislocation from influencing the water conservancy diversion effect, can also prevent that the comdenstion water in the condensation chamber from getting into thermal insulation through the clearance between second portion and the battery monomer inboard, guarantees the free insulating properties of battery. Moreover, when the battery is subjected to vibration and impact in the working process, the second part can absorb the vibration and the impact if the elastic material is adopted, so that the mechanical stress of the battery monomer is reduced.

In some embodiments, the second end of the second portion abuts against an edge of the battery cell near the cover.

The thermal insulation part of the embodiment can protect the whole outer side face of the battery cell, condensed water generated outside the thermal insulation part is prevented from entering the inner side or contacting with the side face of the battery cell, the insulation performance of the battery cell is guaranteed to the maximum extent, the probability of short circuit or high-voltage ignition is reduced, and therefore safety in the working process of the battery is improved.

In some embodiments, the second portion is resilient.

This embodiment is through being elastic construction with the design of second portion, can be in the battery monomer of packing into from the open end in top of thermal insulation spare, is convenient for outwards strut the second portion to make battery monomer pack into smoothly, reduce to take place the friction between second portion and the battery monomer and cause battery monomer to take place insulating damage, thereby guarantee the assembly quality of battery.

In some embodiments, at least one of the inner and outer surfaces of the second portion is provided with an adhesive layer.

The adhesive layer is arranged on the outer surface of the second part, the second part can be fixed on the side wall of the box body in the process of assembling the single battery, so that the size of the top open end of the thermal insulation piece is increased, the single battery is conveniently installed, the assembling difficulty is reduced, the single battery is prevented from being damaged due to the fact that friction occurs between the second part and the single battery, and the assembling quality of the battery is guaranteed; the inner surface of the second part is provided with an adhesive layer, and after the battery monomer is assembled, the second part is fixed on the side surface of the battery monomer, so that a stable flow guide structure can be formed to guide the condensed water to the drain hole.

In some embodiments, the second portion and the inner wall of the box body assembly form a condensation cavity communicated with the drain hole, and the box body assembly is provided with a pressure relief component communicated with the condensation cavity.

This embodiment can blow in to the box subassembly through the pressure release part and make the comdenstion water in the condensation chamber in time discharge to reach the inside dehumidification effect of box subassembly, make battery monomer work in comparatively dry cavity, can guarantee the free insulating properties of battery, reduce the probability that takes place short circuit or high pressure and strike sparks, thereby improve the security in the battery working process.

In some embodiments, the water draining device is installed outside the box body assembly and communicated with the water draining hole, and the sealing element is detachably installed at one end, far away from the box body assembly, of the water draining device.

This embodiment can be when the inside comdenstion water of box subassembly is discharged in needs, pull down the sealing member and carry out the drainage to installation sealing member after the drainage finishes, make the interior airtight cavity that forms of box subassembly, prevent that outside dust steam from getting into the box subassembly in, set up the sealing member into detachable construction, can conveniently discharge the comdenstion water in the battery, be convenient for maintain.

In some embodiments, a plurality of battery cells are provided, and the plurality of battery cells form at least one battery module, and each battery module is provided with one thermal insulator.

The thermal insulation piece is correspondingly arranged on each battery module, so that the thermal insulation piece is designed to surround the periphery of the battery module, and the effect of preventing condensed water is better; and the thermal insulation parts corresponding to different battery modules are mutually independent, so that the assembly is easy, and the assembly efficiency can be improved.

According to a second aspect of the present application, there is provided an electric device, comprising the battery of the above embodiment, the battery being configured to provide electric energy to the electric device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of some embodiments of a powered device of the present application;

fig. 2 is an exploded view of some embodiments of the battery of the present application;

fig. 3 is a cross-sectional view of some embodiments of a battery of the present application;

FIG. 4 is a schematic structural view of some embodiments of thermal insulation in a battery of the present application;

fig. 5 is a schematic structural view of some embodiments of a moisture absorber in the battery of the present application;

fig. 6 is a schematic structural view of some embodiments of the drainage member and sealing member of the present cell.

In the drawings, the drawings are not necessarily to scale.

Description of reference numerals:

10. a battery; 1. a case assembly; 11. a box body; 11', an opening; 111. a bottom wall; 112. a side wall; 12. a cover body; 121. a top wall; 13. a drain hole; 14. a pressure relief component; 2', a battery module; 2. a battery cell; 3. a thermal insulator; 31. a first part; 32. a protrusion; 33. a second section; 34. an adhesive layer; 4. a moisture absorbing member; 5. a drainage member; 51. installing a flange; 52. a drain pipe; 6. a seal member; 61. a thrust part; 62. a closing part; q, a condensation cavity; l, a gap; s, an accommodating cavity;

20. a vehicle; 21. an axle; 22. a wheel; 23. a motor; 24. and a controller.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the described embodiments.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

This application uses the terms "upper," "lower," "top," "bottom," "front," "back," "inner" and "outer" to describe any orientation or positional relationship as may be used to describe the present application, but does not indicate or imply that the referenced devices must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present application.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "vertical" is not strictly vertical, but is within the tolerance of the error. "parallel" is not strictly parallel but within the tolerance of the error. The directional terms used in the following description are intended to refer to directions shown in the drawings, and are not intended to limit the specific structure of the present application.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in this application can be understood as appropriate by one of ordinary skill in the art.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least some embodiments of the application. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

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 embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in a packaging manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are also not limited in the embodiment of the application.

The current battery cell generally includes a case and an electrode assembly accommodated in the case, and an electrolyte is filled in the case. The electrode assembly is mainly formed by stacking or winding first and second pole pieces of opposite polarities, and a separator is generally disposed between the first and second pole pieces. The first and second pole pieces are coated with the coated portions constituting a main body portion of the electrode assembly, and the uncoated portions of the first and second pole pieces constitute first and second tabs, respectively. In the lithium ion battery, the first pole piece may be a positive pole piece, and includes a positive pole current collector and positive pole coating layers disposed on two sides of the positive pole current collector, the positive pole current collector may be made of, for example, aluminum, and the positive pole coating may be, for example, lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like; the second electrode sheet may be a negative electrode sheet including a negative electrode current collector and negative electrode coating layers disposed on both sides of the negative electrode current collector, the material of the negative electrode current collector may be, for example, copper, and the negative electrode coating may be, for example, graphite, silicon, or the like. The first tab and the second tab may be located at one end of the main body or at two ends of the main body respectively. In the charging and discharging process of the battery monomer, the anode coating and the cathode coating react with the electrolyte, and the tab is connected with the electrode lead-out part to form a current loop.

The relief part refers to an element or a part that is actuated to relieve the internal pressure or temperature of the battery cell when the internal pressure or temperature reaches a predetermined threshold. The threshold design varies according to design requirements. The threshold may depend on the material of one or more of the positive electrode sheet, the negative electrode sheet, the electrolyte and the separator in the battery cell. The pressure relief part may take the form of, for example, an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and may specifically take the form of a pressure-sensitive or temperature-sensitive element or configuration, that is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold value, the pressure relief part performs an action or a weak structure provided in the pressure relief part is broken, thereby forming an opening or a passage through which the internal pressure or temperature can be relieved.

The term "activate" as used herein means that the pressure relief component is activated or activated to a certain state, so that the internal pressure and temperature of the battery cell are relieved. The actions generated by the relief features may include, but are not limited to: at least a portion of the pressure relief features are broken, crushed, torn or opened, etc. When the pressure relief component is actuated, internal emissions of the battery cells are discharged outwards from the actuated part. In this way, the battery cells can be decompressed and warmed under the condition of controllable pressure or temperature, so that the potential more serious accidents are avoided.

Among these, emissions from cells mentioned herein include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of a separation film, high-temperature and high-pressure gas (such as combustible gas including CH4, CO and the like) generated by reaction, flame and the like.

The safety problem of the current battery still exists in the use process, which is mainly reflected in the phenomenon of short circuit caused by insulation failure, and high-voltage ignition may occur in serious cases. The inventor finds out through long-term research that the main reason causing the problem is that: the battery is during operation under the lower condition of ambient temperature, and box subassembly temperature is lower, and the battery monomer of battery inside then because generate heat make the inside gas temperature of box subassembly higher, under the effect of cold and hot difference in temperature, gaseous condensing easily forms the comdenstion water on the inner wall of box subassembly, does not set up drainage structures in the present battery. Therefore, the generated condensed water can flow to the bottom of the battery cell along the inner wall of the box body assembly.

In order to improve the bonding capacity of a single battery between the bottoms of the box body assemblies, partial areas of the bottoms of the single batteries are exposed out of the aluminum shell, the bottom of the single battery cannot be completely covered by glue by the existing gluing process, the exposed aluminum shell area which is not filled with glue may exist, and when condensed water flows to the bottoms of the single batteries, the problem of insulation failure is easily caused.

Therefore, the inventors thought that in order to reduce the probability of the occurrence of the insulation failure problem, it is necessary to reduce the generation of the condensed water or to smoothly discharge the condensed water outside the tank assembly.

Based on this improved idea, the present application provides a battery comprising: the box body assembly comprises a box body and a cover body, the box body comprises a bottom wall and a plurality of side walls connected to the bottom wall, the end parts, far away from the bottom wall, of the side walls are enclosed to form an opening, and the cover body is used for sealing the opening; the battery monomer is arranged in the box body component; and a thermal insulation member provided between the case assembly and the battery cell.

When the battery works in a low-temperature environment, hot air around the battery monomer can be prevented from directly contacting with a box body assembly with a lower temperature to carry out heat exchange, and the cold-hot temperature difference is reduced, so that condensed water generated by the air in the box body assembly under the condensation action is reduced; also, the thermal insulator occupies a gap between the case assembly and the battery cell, thereby further reducing the generation of condensed water. Therefore, the problem of insulation failure caused by the fact that condensed water flows to the battery monomer can be reduced, the probability of short circuit or high-voltage ignition is reduced, and therefore safety of the battery in the working process is improved.

The battery cell of the embodiment of the application is suitable for the electric device using the battery.

The power consumption device may be a mobile phone, a portable device, a notebook computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, an electric tool, and the like, for example, the spacecraft includes an airplane, a rocket, a space plane, a spacecraft, and the like, the electric toy includes a stationary or mobile electric toy, for example, a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for a railway, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an electric drill impact, a concrete vibrator, and an electric planer.

As shown in fig. 1, the electric device may be a vehicle 20, such as a new energy vehicle, which may be a pure electric vehicle, a hybrid electric vehicle, or a range-extended vehicle; or the electric device can be an unmanned aerial vehicle or a ship and the like. Specifically, the vehicle 20 may include an axle 21, wheels 22 connected to the axle 21, a motor 23, a controller 24, and a battery 10, the motor 23 is used for driving the axle 21 to rotate, the controller 24 is used for controlling the motor 23 to operate, and the battery 10 may be disposed at the bottom, head or tail of the vehicle 20 for providing electric energy for the operation of the motor 23 and other components in the vehicle.

In some embodiments, as shown in fig. 2, battery 10 includes: the box body assembly 1 comprises a box body 11 and a cover body 12, wherein the box body 11 comprises a bottom wall 111 and a plurality of side walls 112 connected to the bottom wall 111, the ends of the side walls 112 far away from the bottom wall 111 enclose to form an opening 11', and the cover body 12 is used for closing the opening 11'; the battery monomer 2 is arranged in the box body component 1; and a thermal insulator 3 provided between the case assembly 1 and the battery cell 2.

Wherein, the inside of the case assembly 1 is a hollow structure, and the case 11 and the cover 12 are buckled together. For example, the box 11 and the cover 12 may be hollow cuboids, and only one surface of each of the cuboids is an opening surface, and the cover 12 is fastened to the opening 11' of the box 11 to form the box assembly 1 having a closed cavity. At least one battery monomer 2 is electrically connected and then placed in a closed cavity formed after the box body 11 and the cover body 12 are buckled.

Specifically, the box body 11 includes a bottom wall 111 and a plurality of side walls 112 connected to the bottom wall 111, ends of the plurality of side walls 112 far from the bottom wall 111 enclose an opening 11', and the cover body 12 is used for closing the opening 11'. The wall of the cover 12 opposite to the bottom wall 111 is a top wall, the cover 12 may be a flat plate structure, or a flange may be provided around the top wall 121. For example, the case 11 has a rectangular parallelepiped shape having at least four side walls 112 at the outer periphery. In assembly, the battery cell 2 may be adhered to the bottom wall 111 by glue, and the battery cell 2 and the top wall 121 may be optionally adhered to each other with a gap between the outermost battery cell 2 and the side wall 112.

The number of the battery cells 2 may be one or more. If a plurality of battery monomers 2 are provided, the plurality of battery monomers 2 can be connected in series or in parallel or in series-parallel, the series-parallel connection refers to that the plurality of battery monomers 2 are connected in series or in parallel, the plurality of battery monomers 2 can be connected in series or in parallel or in series-parallel to form a battery module 2', and the plurality of battery modules 2' are connected in series or in parallel or in series-parallel to form a whole and are accommodated in the box body component 1. Or all the single batteries 2 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by all the single batteries 2 is accommodated in the box body component 1. The battery cell 2 may take a standing form, that is, the electrode terminal of the battery cell 2 is disposed toward the lid 12; or the battery cell 2 takes a flat form in which the electrode terminals are disposed toward the side wall 112.

The thermal insulator 3 is disposed between the case assembly 1 and the battery cell 2, and since condensed water is easily generated at a position where a gap exists between the case assembly 1 and the battery cell 2, the thermal insulator 3 may be disposed between the side wall 112 and the battery cell 2 or between the top wall 121 and the battery cell 2. The thermal insulator 3 may block the transfer of heat between the case assembly 1 and the battery cell 2, and the thermal conductivity of the thermal insulator 3 is less than that of air. For example, rubber, glass fiber, asbestos, aerogel blanket, vacuum plate, or the like can be used as the thermal insulator 3.

In the embodiment, the thermal insulation member 3 is arranged between the box body assembly 1 and the battery monomer 2, so that when the battery 10 works in a low-temperature environment, hot air around the battery monomer 2 can be prevented from directly contacting with the box body assembly 1 with a lower temperature to exchange heat, the cold-hot temperature difference is reduced, and the condensate water generated by the air in the box body assembly 1 under the condensation action is reduced; also, the thermal insulator 3 occupies the gap between the case assembly 1 and the battery cell 2, thereby further reducing the generation of condensed water. Therefore, the problem of insulation failure caused by the flow of condensed water to the battery cell 2 can be reduced, and the probability of short circuit or high-voltage ignition is reduced, so that the safety of the battery 10 in the working process is improved.

In some embodiments, as shown in fig. 3, at least part of the outer surface of the thermal insulator 3 conforms to the inner surface of the case assembly 1.

The outer surface of the thermal insulator 3 is a surface facing the case assembly 1, and the bonding regions may be provided continuously or in plurality independently. For example, the outer surface of the thermal insulator 3 is attached to the inner surface of the case assembly 1 except the portion that needs to be separated from the case assembly 1, so as to provide a better positioning function for the thermal insulator 3, and further, the non-insulation region where the condensed water generated on the inner wall of the case assembly 1 flows to the bottom of the battery cell 2 can be reduced. Alternatively, the outer surface of the thermal insulation 3 may also be provided with recesses locally in the entire fitting area.

For example, if the thermal insulator 3 is located between the side wall 112 and the battery cell 2, at least a part of the outer surface of the thermal insulator 3 is fitted to the side wall 112; if the thermal insulator 3 is located between the top walls 121, at least part of the outer surface of the thermal insulator 3 is in contact with the top walls 121.

This embodiment can play better location effect to thermal insulation piece 3 through the inner surface of box subassembly 1, prevents that thermal insulation piece 3 from taking place to rock or misplace in box subassembly 1, prescribes a limit to the formation area of comdenstion water reliably in specific position, prevents that the comdenstion water from flowing wantonly and causing the insulating inefficacy of battery monomer 2, reduces the probability of taking place short circuit or high pressure and striking sparks to improve the security in the battery 10 course of operation. Moreover, the thermal insulation member 3 is attached to the inner surface of the case assembly 1, so that the generation of condensed water on the inner wall of the case assembly 1 can be reduced, the condensed water is prevented from flowing along the inner surface of the case assembly 1 and converging to the non-insulation area at the bottom of the battery monomer 2, and the safety of the battery 10 in the working process can be further improved.

In some embodiments, as shown in fig. 3, thermal insulation 3 is provided between the side wall 112 and the battery cell 2.

The thermal insulation member 3 may be disposed between at least one side wall 112 and the corresponding battery cell 2, for example, the thermal insulation member 3 is disposed between a part of the side walls 112 and the battery cells 2, or the thermal insulation member 3 is disposed between all the side walls 112 and the battery cells 2, so as to minimize the generation of condensed water. If the thermal insulation member 3 covers the plurality of side walls 112, the corresponding portions of the thermal insulation member 3 at the plurality of side walls 112 may be independent of each other, or may be connected to each other, for example, by bonding or connecting members, or the thermal insulation member 3 may be provided as an integral structure.

During assembly, the single battery 2 may be installed first, and then the thermal insulating member 3 is embedded in the gap between the sidewall 112 and the single battery 2; alternatively, the thermal insulator 3 may be mounted first, and then the battery cell 2 may be mounted in the inner region of the thermal insulator 3. In the structure in which the battery cell 2 is vertically placed, that is, the electrode terminal of the battery cell 2 is drawn out toward the lid 12, the surface of the battery cell 2 facing the side wall 112 is a flat surface, and the battery cell 2 can be easily assembled even after the thermal insulator 3 is mounted.

In the embodiment, the thermal insulator 3 is arranged between the side wall 112 and the single battery 2, so that the space between the side wall 112 and the single battery 2 can be fully utilized, the effect of reducing the generation of condensed water is achieved on the basis of not increasing the whole volume of the battery 10, and the thermal insulator 3 occupies part of the space between the side wall 112 and the single battery 2, so that the generation of condensed water can be further reduced; in addition, the difficulty in assembling the battery cells 2 can be avoided.

In some embodiments, as shown in fig. 4, the thermal insulator 3 is closed along the outer peripheral side of the battery cell 2 located therein.

The thermal insulator 3 is an integrally molded structure, and is integrally molded using an elastic material such as rubber. One or more battery cells 2 may be provided in the thermal insulator 3, and the thermal insulator 3 may be continuously extended and closed along the outer circumferential side of the battery cells 2 therein. For example, a plurality of battery cells 2 are disposed in the thermal insulator 3, the battery cells 2 form a battery module 2', and the thermal insulator 3 extends along the peripheral side surface of the battery module 2' and is sealed, which is equivalent to forming a sealed rectangular structure, and is sleeved outside the battery module 2 '. The end of the thermal insulator 3 facing the bottom wall 111 is open to bond the battery cell 2 to the bottom wall 111; the end of the thermal insulator 3 facing the top wall 121 is open so that the battery cell 2 is loaded therein through the top open end of the thermal insulator 3 when assembled.

The thermal insulation member 3 in this embodiment is designed as an integral structure, which facilitates installation of the thermal insulation member 3 and improves the assembly efficiency of the battery 10; moreover, the battery cell 2 can be loaded from the thermal insulator 3 toward the open end of the top wall 121 and bonded to the bottom wall 111, facilitating the installation of the battery cell 2.

In some embodiments, as shown in fig. 3, the thermal insulator 3 includes a first portion 31 with a gap L between the first portion 31 and the battery cell 2.

The first portion 31 may have a plate-shaped structure, an outer side surface of the first portion 31 may be attached to the sidewall 112, and a gap L is formed between the inner side surface of the first portion 31 and the battery cell 2. In the thickness direction of the battery 10, i.e., in the direction perpendicular to the bottom wall 111, the first portion 31 may extend from the bottom wall 111 to the top wall 121, or the first portion 31 may extend from the bottom wall 111 to a position near the top wall 121.

This embodiment makes to have clearance L between first portion 31 and battery monomer 2, is convenient for install battery monomer 2 at the inboard of thermal insulation piece 3, avoids first portion 31 all to cause the assembly difficulty with battery monomer 2 zero clearance on whole extension length, can reduce the assembly difficulty from this to prevent that battery monomer 2 from rubbing between thermal insulation piece 3 and causing the damage when the assembly, for example insulation failure etc. can guarantee the assembly quality of battery 10.

In some embodiments, the thermal insulator 3 further includes a protrusion 32, a first end of the protrusion 32 is connected to the inner side surface of the first portion 31, and a second end of the protrusion 32 abuts against the battery cell 2.

The protrusions 32 may be integrally formed with the first portion 31, and as shown in fig. 4, the protrusions 32 may extend continuously along the outer peripheral side of the battery cell 2 in the thermal insulating member 3, or may be provided intermittently. For example, the cross-section of the protrusion 32 may be rectangular, trapezoidal, triangular, or the like. Thickness reduces from first end to second end when protruding 32 adopts triangle-shaped, on playing the basis of positioning action to battery monomer 2, can increase protruding 32 and the joint strength of first portion 31, can make battery monomer 2 pack into heat insulating part 3 smoothly again in, reduce the installation resistance, prevent to cause the damage to battery monomer 2 and influence insulating effect.

The thermal insulation member 3 of this embodiment can play a role in positioning the installation of the battery cell 2 by providing the protrusion 32 on the inner side surface of the first portion 31, easily and accurately determine the installation position of the battery cell 2, and can reduce the assembly difficulty and improve the assembly efficiency of the battery 10.

In some embodiments, the protrusion 32 is provided at a region of the first portion 31 near the bottom wall 111.

Wherein, in order to realize the fixed of battery monomer 2, bond through heat conduction glue between battery monomer 2 bottom and the diapire 111, when placing battery monomer 2 on diapire 111, the heat conduction glue of coating on the diapire 111 can spill over to the clearance from the side of battery monomer 2. When the battery 10 is operated in a low-temperature environment, in order to meet the requirement of low-temperature starting, the heat dissipation of the working heat of the battery monomer 2 is prevented as much as possible, and the protrusion 32 can reduce the overflow of the heat-conducting glue, thereby reducing the heat dissipation.

In order to not only enable the protrusion 32 to position the battery cell 2, but also prevent more heat-conducting glue from overflowing to the side surface of the battery cell 2, a preset distance is provided between the protrusion 32 and the bottom wall 111.

This embodiment can make protruding 32 provide the basis of location to battery monomer 2's installation, further prevents more heat-conducting glue to spill over to battery monomer 2's side, reduces to distribute in great area and increase the radiating effect through heat-conducting glue, makes battery 10 satisfy the demand of low temperature work better.

In some embodiments, the battery 10 further includes a moisture absorbing member 4 provided on an inner side surface of the thermal insulating member 3, and configured to absorb moisture in the case assembly 1.

Although the thermal insulating member 3 can reduce the transmission of the low temperature of the case assembly 1 to the periphery of the battery cell 2, a small amount of condensed water is generated in the gap L due to the gap L between the first portion 31 and the battery cell 2, and the moisture absorbing member 4 can absorb the condensed water. The moisture absorbing member 4 may have a sheet-like structure, and may be attached to the inner side surface of the first portion 31 by a fastening member, an adhesive, or the like, and may be located at a position above the protrusion 32.

As shown in fig. 4, the thermal insulating member 3 is closed along the outer peripheral side of the battery cell 2 located therein, and the moisture absorbing member 4 is also closed along the outer peripheral side of the battery cell 2 located therein, for example, in a rectangular ring-like structure. Alternatively, the moisture absorbing member 4 may be designed in multiple stages, each of which is provided on a different inner side surface of the thermal insulation member 3.

This embodiment sets up moisture absorption spare 4 through the medial surface at thermal insulation 3, can absorb the little comdenstion water that produces between thermal insulation 3 and the battery monomer 2, keeps battery monomer 2 to be in dry operational environment, prevents that a small amount of comdenstion water from gathering and flowing to battery monomer 2 bottom, can guarantee battery monomer 2's insulating properties, reduces the probability that takes place short circuit or high pressure and strike sparks to improve the security in the battery 10 working process.

In some embodiments, the tank assembly 1 is provided with a drainage hole 13, the thermal insulator 3 includes a first portion 31 and a second portion 33, the second portion 33 has a lower thermal insulation capacity than the first portion 31, a first end of the second portion 33 is connected to a top end of the first portion 31, and the second portion 33 is configured to guide the condensed water in the tank assembly 1 to the drainage hole 13.

Wherein, the drainage hole 13 may be disposed on the sidewall 112 of the box 11, at least one drainage hole 13 may be disposed correspondingly to each thermal insulation member 3, and the drainage hole 13 may be disposed at a position close to the first end of the second portion 33. By providing the second portion 33 having a lower heat insulating capability than the first portion 31, a condensation chamber Q may be formed around the second portion 33, and condensed water formed in the condensation chamber Q may be discharged through the drain hole 13.

Alternatively, the second portion 33 and the first portion 31 may be made of the same material, and the heat insulation capacity of the second portion 33 is lower than that of the first portion 31 through the structural design; or the second portion 33 has a higher thermal conductivity than the first portion 31. The second portion 33 may be integrally formed with the first portion 31.

Optionally, the second portion 33 has an arc-shaped configuration, such as a circular arc. The outer surface of the second portion 33 serves as a guide surface, which may be recessed inward, so that the condensed water flows to the drain hole 13 at a uniform velocity along the guide surface. Alternatively, the flow guiding surface of the second portion 33 may be a plane inclined downward from the second end to the first end, or other curved surface capable of achieving the flow guiding effect.

This embodiment can guide the condensed water formed between the second portion 33 and the case assembly 1 to the drain hole 13 to be drained out of the case assembly 1 by providing the second portion 33 at the top end of the first portion 31, and can reduce maintenance costs without opening the case to remove water during long-term use of the battery 10.

In some embodiments, as shown in FIG. 3, the thickness of second portion 33 is less than the thickness of first portion 31.

Wherein the second portion 33 gradually decreases in thickness from the first end to the second end.

This embodiment makes second portion 33 attenuate gradually from first end to second end thickness, can increase condensation chamber Q's volume, can improve the storage capacity of comdenstion water, can be convenient for outwards remove the second end of second portion 33 through external force again when assembling battery monomer 2 to pack into battery monomer 2 smoothly, reduce the assembly degree of difficulty. In addition, the reduced thickness structure enables the second portion 33 and the first portion 31 to be integrally formed by using the same material, thereby reducing the difficulty in processing the thermal insulator 3.

In some embodiments, the second end of the second portion 33 extends toward the cover 12 and abuts against the battery cell 2.

The second end of the second portion 33 and the side surface of the battery cell 2 may be fixed in an adhesive manner, or the second portion 33 is made of an elastic material, and the second portion 33 and the battery cell 2 are fixed in a tight fit manner. For example, the second portion 33 is in contact with the battery cell 2 over the entire circumferential side wall of the battery cell 2 therein. Optionally, the second end of the second portion 33 is sealed between the battery cells 2.

This embodiment makes the second end of second portion 33 support by in battery monomer 2, not only can improve the stability of second portion 33, prevents that the position dislocation from influencing the water conservancy diversion effect, can also prevent that the comdenstion water in the condensation chamber Q from getting into thermal insulation 3 inboardly through the clearance between second portion 33 and the battery monomer 2, guarantees battery monomer 2's insulating properties. Moreover, when the battery 10 is subjected to vibration and impact during operation, the elastic material of the second portion 33 can absorb the vibration and impact, so as to reduce the mechanical stress of the battery cell 2.

In some embodiments, the second end of the second portion 33 abuts against the edge of the battery cell 2 near the cover 12.

Wherein the second end of the second portion 33 abuts against the top edge of the battery cell 2, i.e., the thermal insulator 3 covers the battery cell 2 entirely in the thickness direction of the battery 10. The condensation chamber Q is enclosed by the second portion 33, the side wall 112 and the cover 12. Alternatively, the second end of the second portion 33 may be lower than the edge of the battery cell 2 close to the cover 12, and the condensation chamber Q is formed by the second portion 33, the side wall 112, the cover 12 and the side surface of the battery cell 2.

The thermal insulation member 3 of the embodiment can protect the whole outer side surface of the battery cell 2, prevent condensed water generated outside the thermal insulation member 3 from entering the inner side or contacting the side surface of the battery cell 2, ensure the insulation performance of the battery cell 2 to the maximum extent, reduce the probability of short circuit or high-voltage ignition, and improve the safety of the battery 10 in the working process.

In some embodiments, the second portion 33 is resilient.

The second portion 33 may be made of an elastic material, such as rubber, and the thermal insulator 3 may be made of an elastic material as a whole for processing convenience. Or the second portion 33 may be elastic by being reduced in thickness.

In this embodiment, the second portion 33 is designed to be an elastic structure, so that the battery cell 2 can be installed from the top open end of the thermal insulating member 3, the second portion 33 can be conveniently opened outwards, the battery cell 2 can be smoothly installed, the insulation damage of the battery cell 2 caused by the friction between the second portion 33 and the battery cell 2 is reduced, and the assembling quality of the battery 10 is ensured.

In some embodiments, as shown in fig. 4, at least one of the inner and outer surfaces of the second portion 33 is provided with an adhesive layer 34.

Wherein the adhesive layer 34 on the outer surface is configured to bond the second portion 33 to the sidewall 112 during assembly of the battery cell 2, and the adhesive layer 34 on the inner surface is configured to bond the second portion 33 to the battery cell 2 after assembly of the battery cell 2 is completed.

For example, the adhesive layer 34 may be a double-sided tape or other adhesive means, and the second portion 33 has elasticity, so that it can swing inward and outward relative to the top end of the first portion 31 through deformation. The outer surface of the second portion 33 is provided with an adhesive layer 34, and before the battery cell 2 is assembled, the release paper on the adhesive layer 34 on the outer surface of the second portion 33 can be removed to adhere the second portion 33 to the side wall 112, for example, when the thermal insulator 3 has a rectangular parallelepiped ring structure, the second portions 33 on four sides can be adhered to the side wall 112, so as to leave a large space for the battery cell 2 to be assembled into the thermal insulator 3. The inner surface of the second portion 33 is provided with an adhesive layer 34, after the assembly of the single battery 2 is completed, the release paper on the adhesive layer 34 on the inner surface of the second portion 33 can be removed, the second portion 33 is adhered to the side surface of the single battery 2 to guide the flow of the condensed water, for example, the second portions 33 on four sides are all adhered to the single battery 2.

In the embodiment, the adhesive layer 34 is arranged on the outer surface of the second part 33, so that the second part 33 can be fixed on the side wall 112 of the box body 11 in the process of assembling the single battery 2, the size of the top open end of the thermal insulation member 3 is increased, the single battery 2 can be conveniently installed, the assembly difficulty is reduced, the insulation damage of the single battery 2 caused by the friction between the second part 33 and the single battery 2 is reduced, and the assembly quality of the battery 10 is ensured; the inner surface of the second portion 33 is provided with an adhesive layer 34, and after the battery cell is assembled, the second portion 33 is fixed on the side surface of the battery cell 2, so that a stable flow guide structure can be formed to guide the condensed water to the drain hole 13.

In some embodiments, the second portion 33 and the inner wall of the box body assembly 1 form a condensation chamber Q communicated with the drainage hole 13, and the box body assembly 1 is provided with a pressure relief component 14, and the pressure relief component 14 is communicated with the condensation chamber Q.

The pressure release component 14 may be disposed on the sidewall 112, for example, the pressure release component 14 may be located at a position corresponding to the condensation cavity Q, and configured to blow the condensed water in the condensation cavity Q to the drainage hole 13 under the condition that the external air is introduced through the pressure release component 14, so as to be discharged in time, and the external air may be a hot air flow, so as to achieve the effect of dehumidifying the inside of the box body assembly 1.

This embodiment can blow to the box subassembly 1 through pressure release part 14 and make the comdenstion water in the condensation chamber Q in time discharge to reach the inside effect of dehumidifying of box subassembly 1, make battery monomer 2 work in comparatively dry cavity, can guarantee battery monomer 2's insulating properties, reduce the probability that takes place the short circuit or high pressure and strike sparks, thereby improve the security in the battery 10 working process.

In some embodiments, as shown in fig. 6, the battery 10 further includes a drain member 5 and a sealing member 6, the drain member 5 is mounted outside the case assembly 1 and is communicated with the drain hole 13, and the sealing member 6 is detachably mounted at one end of the drain member 5 away from the case assembly 1.

The drainage member 5 may include a mounting flange 51 and a drainage pipe 52, the mounting flange 51 is mounted outside the sidewall 112, the drainage pipe 52 is connected to the mounting flange 51, the drainage pipe 52 may be of an L-shaped structure, the cross section of the drainage pipe may be any shape such as rectangular, circular, oval or polygonal, the transverse portion of the L-shaped structure is communicated with the drainage hole 13, and the vertical portion extends downward so as to drain the condensed water. The sealing member 6 comprises a thrust portion 61 and a closing portion 62, the closing portion 62 is inserted into one end of the drain pipe 52 far away from the box body assembly 1 to realize sealing, and the thrust portion 61 abuts against the end of the drain pipe 52 of the drain member 5. When the condensed water in the box body assembly 1 needs to be discharged, the sealing piece 6 is detached, and air is blown into the box body assembly 1 through the pressure relief part 14, so that the condensed water in the condensation cavity Q is discharged through the drainage piece 5; after the drainage is completed, the sealing member 6 is attached to the drainage member 5 to seal.

Alternatively, the drain pipe 52 forms a communicating vessel with the condensation chamber Q, the drain member 5 may be made of a transparent material, the accumulation of condensed water inside the case assembly 1 can be observed outside the battery 10, and the sealing member 6 can be removed to drain when the accumulation amount is large.

This embodiment can pull down sealing member 6 and carry out the drainage when the inside comdenstion water of box subassembly 1 is discharged to needs to be discharged to installation sealing member 6 after the drainage finishes, make and form airtight cavity in the box subassembly 1, prevent that outside dust steam from getting into in the box subassembly 1, set up sealing member 6 into detachable construction, the comdenstion water in the battery 10 of can conveniently discharging is convenient for maintain.

In some embodiments, a plurality of battery cells 2 are provided, and the plurality of battery cells 2 form at least one battery module 2', and each battery module 2' is provided with one thermal insulator 3.

When a plurality of battery modules 2 'are provided, a plurality of thermal insulators 3 are also provided, and the plurality of battery modules 2' and the plurality of thermal insulators 3 are provided in one-to-one correspondence. The case assembly 1 may further include a partition plate which may be provided between the two peripherally opposite side walls 112 to partition the inner space of the case assembly 1 into a plurality of receiving chambers S, one battery module 2' being provided in each receiving chamber S, the partition plate also being regarded as the side wall 112. Each receiving chamber S may be provided with at least one drain hole 13.

In the embodiment, the thermal insulation member 3 is correspondingly arranged on each battery module 2', so that the thermal insulation member 3 is designed to surround the periphery of the battery module 2', and a better effect of preventing the generation of condensed water is achieved; and the thermal insulation parts 3 corresponding to different battery modules 2' are mutually independent, so that the assembly is easy, and the assembly efficiency can be improved.

The structure of some embodiments of the battery 10 of the present application is given below in conjunction with fig. 2-6.

As shown in fig. 2, the box assembly 1 includes a box body 11 and a cover 12, for example, the box body 1 is a rectangular parallelepiped structure, the box body 11 includes a bottom wall 111 and four side walls 112 located at the periphery, one end of each of the four side walls 112 is connected to four sides of the bottom wall 111, the other end of each of the four side walls 112 encloses to form an opening 11', and the cover 12 closes the opening 11'. The box body 11 can be additionally provided with a side wall 112, the side wall 112 inside the box body 11 is connected between two side walls 112 with opposite peripheries, the inner space of the box body 11 is divided into at least two independent accommodating cavities S, and each accommodating cavity S is internally provided with a battery module 2', and each battery module 2' comprises a plurality of battery monomers 2. One thermal insulator 3 is provided for each battery module 2'.

As shown in fig. 3, taking one of the receiving cavities S as an example, the thermal insulator 3 is located between the side wall 112 and the battery cell 2, and the thermal insulator 3 includes a first portion 31, a protrusion 32, and a third portion 32. The first portion 31 extends in the thickness direction of the battery 10, the outer side surface thereof is in contact with the side wall 112, a gap L is provided between the inner side surface and the side surface of the battery cell 2, and the bottom end of the first portion 31 is in contact with the bottom wall 111. The first end of the second portion 33 is connected to the second end of the first portion 31, the second end of the second portion 33 is adhered to the edge of the battery module 2' close to the cover 12, and the second portion 33 is arc-shaped and gradually decreases in thickness from the first end to the second end. One end of the protrusion 32 is connected to the inner side surface of the first portion 31, and the other end of the protrusion abuts against the side surface of the single battery 2, so as to position the single battery 2; the protrusion 32 may be disposed near the bottom wall 111 to limit the overflow of the thermal conductive paste between the bottom of the battery cell 2 and the bottom wall 111.

The side walls 112, the third portion 33 and the cover 12 enclose a condensation chamber Q, and two opposite side walls 112 are respectively provided with a drainage hole 13, and the drainage hole 13 can be located at the bottom of the condensation chamber Q. A cavity is formed between the second portion 33, the first portion 31, the protrusion 32 and the side surface of the battery cell 2, and condensed water may be generated in this region, and a moisture absorbing member 4 is attached to the inner side surface of the first portion 31, the moisture absorbing member 4 being located between the second portion 33 and the protrusion 32.

As shown in fig. 4, the thermal insulation member 3 has a rectangular ring-shaped structure surrounding the entire outer circumference of the battery module 2', the protrusions 32 and the second portion 33 each continuously extend along the entire outer circumference of the battery module 2', and the second end of the second portion 33 is retracted inward with respect to the first end.

As shown in fig. 5, the moisture absorbing member 4 is also a rectangular ring-shaped structure.

As shown in fig. 6, the drain member 5 is mounted on the side wall 112, the drain pipe 52 of the drain member 5 forms an L-shaped structure, and forms a communication channel with the condensation chamber Q, the drain member 5 can be made of a transparent material, the accumulation of condensed water inside the case assembly 1 can be observed outside the battery 10, and the sealing member 6 can be removed to drain water when the accumulation is large. During the draining process, external air may be introduced from the pressure relief member 14 to promote the draining and to perform dehumidification.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (18)

1. A battery (10) comprising:

the box body assembly (1) comprises a box body (11) and a cover body (12), wherein the box body (11) comprises a bottom wall (111) and a plurality of side walls (112) connected to the bottom wall (111), the ends, far away from the bottom wall (111), of the side walls (112) are enclosed to form an opening (11 '), and the cover body (12) is used for closing the opening (11');

the battery monomer (2) is arranged in the box body component (1); and

and the thermal insulation piece (3) is arranged between the box body assembly (1) and the battery unit (2).

2. Battery (10) according to claim 1, characterized in that at least part of the outer surface of the thermal insulator (3) is conformed to the inner surface of the case assembly (1).

3. Battery (10) according to claim 1, characterized in that the thermal insulation (3) is provided between the side wall (112) and the battery cell (2).

4. The battery (10) according to claim 3, wherein the thermal insulator (3) is closed along an outer peripheral side of the battery cell (2) located therein.

5. Battery (10) according to claim 3, characterised in that said thermal insulator (3) comprises a first portion (31), said first portion (31) having a gap (L) with said battery cell (2).

6. Battery (10) according to claim 5, characterised in that the thermal insulator (3) further comprises a protrusion (32), the first end of the protrusion (32) being connected to the inner side of the first part (31), the second end of the protrusion (32) abutting against the battery cell (2).

7. Battery (10) according to claim 6, characterised in that said protrusion (32) is provided in the region of said first portion (31) close to said bottom wall (111).

8. The battery (10) according to any one of claims 1 to 7, further comprising a moisture absorbing member (4) provided on an inner side surface of the thermal insulating member (3) and configured to absorb moisture in the case assembly (1).

9. The battery (10) according to any of claims 1-7, wherein a drain hole (13) is provided on the case assembly (1), the thermal insulator (3) comprises a first portion (31) and a second portion (33), a first end of the second portion (33) is connected to a top end of the first portion (31), and the second portion (33) is configured to guide condensed water inside the case assembly (1) to the drain hole (13).

10. The battery (10) of claim 9, wherein the thickness of the second portion (33) is less than the thickness of the first portion (31).

11. The battery (10) according to claim 9, wherein a second end of the second portion (33) extends toward the cover (12) and abuts against the battery cell (2).

12. The battery (10) according to claim 11, wherein the second end of the second portion (33) abuts against an edge of the battery cell (2) near the cover (12).

13. The battery (10) according to claim 9, wherein the second portion (33) has elasticity.

14. The battery (10) according to claim 13, wherein at least one of the inner surface and the outer surface of the second portion (33) is provided with an adhesive layer (34).

15. The battery (10) according to claim 10, wherein the second portion (33) and an inner wall of the case assembly (1) form a condensation chamber (Q) communicating with the drain hole (13), and a pressure relief member (14) is provided on the case assembly (1), the pressure relief member (14) communicating with the condensation chamber (Q).

16. The battery (10) according to claim 10, further comprising a drain member (5) and a sealing member (6), wherein the drain member (5) is mounted outside the case assembly (1) and is communicated with the drain hole (13), and the sealing member (6) is detachably mounted on one end of the drain member (5) away from the case assembly (1).

17. The battery (10) according to any one of claims 1 to 7, wherein a plurality of said battery cells (2) are provided, a plurality of said battery cells (2) form at least one battery module (2 '), and one said thermal insulator (3) is provided for each said battery module (2').

18. An electric device (20), comprising: the battery (10) of any of claims 1 to 17, said battery (10) being adapted to provide electrical power to said powered device (20).

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