CN117223151A

CN117223151A - Battery and electricity utilization device

Info

Publication number: CN117223151A
Application number: CN202380010044.XA
Authority: CN
Inventors: 唐彧; 黄小腾; 汪文礼; 徐晨怡; 杨海奇; 王鹏
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-12-12

Abstract

The embodiment of the application provides a battery and an electricity utilization device, wherein the battery comprises a battery monomer group and a thermal management device, the battery monomer group comprises a plurality of battery monomers, and the thermal management device is used for adjusting the temperature of the battery monomer group, wherein at least two surfaces of the battery monomers are in heat conduction connection with the thermal management device. According to the embodiment of the application, the heat exchange area of the battery monomer can be increased, so that the heat management efficiency of the heat management device on the battery monomer is higher, the cooling requirement on the battery can be met under the working condition of larger current or faster charging, the heating requirement on the battery can be met under the environment of lower temperature, and the safety and the service life of the battery can be improved.

Description

Battery and electricity utilization device

Cross Reference to Related Applications

The present application claims priority from chinese patent application CN2022233281190 entitled "battery and electric device" filed on 12/13 of 2022, the entire contents of which are incorporated herein by reference.

Technical Field

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

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

In battery technology, how to improve the safety of a battery is a technical problem to be solved.

Disclosure of Invention

The embodiment of the application provides a battery and an electricity utilization device, which can effectively improve the energy density and the safety of the battery.

In a first aspect, the present application provides a battery comprising:

a battery cell group including a plurality of battery cells;

a thermal management device for adjusting the temperature of the battery cell group;

at least two surfaces of the battery cell are in heat conduction connection with the thermal management device.

According to the technical scheme, at least two surfaces of the battery monomer are in heat conduction connection with the heat management device, so that the heat exchange area of the battery monomer can be increased, the heat management efficiency of the heat management device on the battery monomer is higher, the cooling requirement on the battery can be met under the working condition of larger current or faster charging, the heating requirement on the battery can be met under the environment of lower temperature, and the safety and the service life of the battery can be improved.

According to some embodiments of the application, the thermal management device includes a plurality of first thermal management components, the plurality of first thermal management components being disposed at intervals along a first direction, at least one of the battery cells being disposed between two adjacent first thermal management components;

The battery cell is provided with two first surfaces which are oppositely arranged along the first direction, and the two first surfaces of the battery cell are respectively in heat conduction connection with the two first heat management components.

In the above technical scheme, at least one battery monomer is clamped between two adjacent first heat management components, so that the two adjacent first heat management components can play a role in limiting and supporting the battery monomers, the possibility of deformation caused by mutual extrusion of a plurality of battery monomers can be reduced, and the first heat management components can play a role in resisting expansion of the battery monomers, thereby being beneficial to improving the structural stability of the battery. The two first surfaces of the battery monomer are respectively in heat conduction connection with the two first heat management components, so that the battery monomer can realize heat exchange through the two first surfaces, the heat exchange area distribution is more uniform, and the performance stability of the battery is further improved.

According to some embodiments of the application, the first thermal management component is formed with a first heat exchange cavity for receiving a heat exchange medium, the first heat exchange cavities of the plurality of first thermal management components being in communication with each other.

According to the technical scheme, the first heat exchange cavities for containing the heat exchange media are formed by the first heat management components, and the first heat exchange cavities of the plurality of first heat management components are communicated with one another, so that the fluidity of the heat exchange media in the heat exchange cavities can be effectively improved, and the heat exchange efficiency of the heat management device is further improved. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of first heat exchange cavities are communicated, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

According to some embodiments of the application, a plurality of the battery cells arranged in a second direction, which is perpendicular to the first direction, is disposed between two adjacent first thermal management components.

In the above technical solution, compared with a structure in which the battery cells are clamped between two adjacent first thermal management components that are separately arranged, the plurality of battery cells arranged along the second direction share the two first thermal management components, so that the structure and the production and installation process of the thermal management device can be simplified, the number of the first thermal management components can be reduced, and the additional structure (such as the installation and fixation structure) of the first thermal management components can be reduced, thereby saving the production cost of the battery, reducing the space occupied by the additional structure of the first thermal management components, and being beneficial to improving the energy density of the battery.

According to some embodiments of the application, the thermal management device further comprises a plurality of second thermal management components, the plurality of second thermal management components are arranged at intervals along the second direction, and at least one battery cell is arranged between two adjacent second thermal management components;

the battery unit is provided with two second surfaces which are oppositely arranged along the second direction, and the two second surfaces of the battery unit are respectively in heat conduction connection with the two second heat management components.

In the above technical scheme, at least one battery monomer is clamped between two adjacent second heat management components, so that the two adjacent second heat management components can play a role in limiting and supporting the battery monomers, the possibility of deformation caused by mutual extrusion of a plurality of battery monomers can be reduced, and the second heat management components can play a role in resisting expansion of the battery monomers, thereby being beneficial to improving the structural stability of the battery. The two second surfaces of the battery monomer are respectively in heat conduction connection with the two second heat management components, so that the battery monomer can realize heat exchange through the two second surfaces, the heat exchange area of the battery monomer is further distributed more uniformly, and the performance stability of the battery is further improved.

According to some embodiments of the application, the first thermal management component is formed with a first heat exchange cavity for containing a heat exchange medium, and the second thermal management component is formed with a second heat exchange cavity for containing a heat exchange medium, the second heat exchange cavity being in communication with the first heat exchange cavity.

According to the technical scheme, the second heat exchange cavity for containing the heat exchange medium is formed by the second heat management component, and the second heat exchange cavity is communicated with the first heat exchange cavity, so that the fluidity of the heat exchange medium in the heat exchange cavity can be effectively improved, and the heat exchange efficiency of the heat management device is further improved. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of second heat exchange cavities are communicated with the plurality of first heat exchange cavities, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

According to some embodiments of the application, the thermal management device further comprises a third thermal management component disposed on one side of the battery cell stack along a third direction, the third direction being perpendicular to the first direction;

the battery cell has a third surface, the third surface of the battery cell being in thermally conductive connection with the third thermal management component.

In the above technical scheme, the third surface of the battery monomer is in heat conduction connection with the third heat management component, so that the battery monomer can realize heat exchange through the third surface, further the heat exchange area of the battery monomer is distributed more uniformly, and the performance stability of the battery is further improved.

According to some embodiments of the application, the first thermal management component is formed with a first heat exchange cavity for containing a heat exchange medium, and the third thermal management component is formed with a third heat exchange cavity for containing a heat exchange medium, the third heat exchange cavity being in communication with the first heat exchange cavity.

According to the technical scheme, the third heat exchange cavity for containing the heat exchange medium is formed by the third heat management component, and the third heat exchange cavity is communicated with the first heat exchange cavity, so that the fluidity of the heat exchange medium in the heat exchange cavity can be effectively improved, and the heat exchange efficiency of the heat management device is further improved. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of third heat exchange cavities are communicated with the plurality of first heat exchange cavities, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

According to some embodiments of the application, the battery cell further has a fourth surface, the fourth surface being disposed opposite to the third surface along the third direction, and the electrode terminal of the battery cell is disposed on the fourth surface.

In the above technical scheme, the first surface, the second surface and the third surface of the battery cell, which are not provided with the electrode terminals, are in heat conduction connection with the thermal management device so as to realize heat exchange, and the influence of the electrode terminals on the heat exchange of the battery cell and the thermal management device can be reduced.

According to some embodiments of the application, the battery cell further has a fourth surface, the electrode terminal of the battery cell is disposed on the fourth surface, the thermal management device further includes a fourth thermal management component disposed on one side of the battery cell group along a third direction, the fourth surface of the battery cell is thermally connected to the fourth thermal management component, and the third direction is perpendicular to the first direction.

In the above technical scheme, the fourth surface of the battery monomer is in heat conduction connection with the fourth heat management component, so that the battery monomer can realize heat exchange through the fourth surface, further the heat exchange area of the battery monomer is distributed more uniformly, and the performance stability of the battery is further improved. And the fourth thermal management component can also cooperate with the third thermal management component to realize the limiting effect on the battery monomer, can play the role of resisting expansion of the battery monomer, and is favorable for improving the structural stability of the battery.

According to some embodiments of the application, the fourth thermal management component does not overlap with electrode terminals of the battery cells, as viewed in the third direction.

In the above technical solution, the fourth thermal management part is not overlapped with the electrode terminals of the battery cells, as viewed in the third direction, so that the fourth thermal management part can reduce the influence on the connection of the electrode terminals with other parts.

According to some embodiments of the application, a pressure relief mechanism is provided on the fourth surface of the battery cell, the fourth thermal management component not overlapping the pressure relief mechanism as seen in the third direction.

Among the above-mentioned technical scheme, through making along the third direction observation, fourth thermal management part and relief mechanism do not overlap, can reduce the influence of fourth thermal management part to the relief mechanism pressure release, and then can reduce the influence to the security of battery.

According to some embodiments of the application, the fourth thermal management component is provided in plurality, the fourth thermal management component extends along the first direction, the plurality of fourth thermal management components is provided at intervals along a second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

In the above technical scheme, through setting up a plurality of fourth thermal management parts, can make fourth thermal management part to the free heat transfer area of battery bigger, heat exchange efficiency is higher.

According to some embodiments of the application, the thermal management device further comprises a manifold member connecting a plurality of the fourth thermal management members, the fourth thermal management members being formed with a fourth heat exchange chamber for receiving a heat exchange medium, the manifold member being formed with a manifold for receiving a heat exchange medium, the fourth heat exchange chamber being in communication with the manifold.

In the above technical scheme, the plurality of fourth heat management components are connected through the current collecting component, so that the structure of the plurality of fourth heat management components is firmer, and the strength of the whole structure of the battery is higher. The fourth heat exchange cavities of the fourth heat management components are communicated with the flow collecting cavities of the flow collecting components, so that the fluidity of heat exchange media in the heat exchange cavities can be effectively improved, and the heat exchange efficiency of the heat management device is further improved. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of fourth heat exchange cavities are communicated with the manifold, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

According to some embodiments of the application, two of the current collecting members are arranged at intervals along the first direction, and two ends of the fourth thermal management member are respectively connected with the two current collecting members.

According to the technical scheme, by arranging the two current collecting parts, two ends of the fourth heat management part can be connected with the two current collecting parts respectively, and the fluidity of a heat exchange medium in the heat exchange cavity can be further improved, so that the heat exchange efficiency of the heat management device is further improved.

According to some embodiments of the application, the first thermal management component is formed with a first heat exchange cavity for containing a heat exchange medium, and the fourth thermal management component is formed with a fourth heat exchange cavity for containing a heat exchange medium, the fourth heat exchange cavity being in communication with the first heat exchange cavity.

According to the technical scheme, the fourth heat exchange cavity for containing the heat exchange medium is formed by the fourth heat management component, and the fourth heat exchange cavity is communicated with the first heat exchange cavity, so that the fluidity of the heat exchange medium in the heat exchange cavity can be effectively improved, and the heat exchange efficiency of the heat management device is further improved. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of fourth heat exchange cavities are communicated with the plurality of first heat exchange cavities, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

According to some embodiments of the application, the thermal management device comprises a first thermal management component and a second thermal management component, the battery cell has two first surfaces disposed opposite in a first direction and two second surfaces disposed opposite in a second direction, at least one of the first surfaces of the battery cell is in thermally conductive connection with the first thermal management component, at least one of the second surfaces of the battery cell is in thermally conductive connection with the second thermal management component, and the first direction is perpendicular to the second direction.

In the technical scheme, at least one first surface and at least one second surface of the battery monomer are in heat conduction connection with the heat management device, so that the battery monomer can realize heat exchange through two vertical surfaces, further realize heat exchange in multiple directions, and the reliability of heat exchange of the battery monomer is improved.

According to some embodiments of the application, the plurality of first thermal management components are arranged at intervals along the first direction, at least one battery cell is arranged between two adjacent first thermal management components, and two first surfaces of the battery cell are respectively in thermal conduction connection with the two first thermal management components.

According to some embodiments of the application, the second thermal management component is provided in plurality, the plurality of second thermal management components are arranged at intervals along the second direction, at least one battery cell is arranged between two adjacent second thermal management components, and two second surfaces of the battery cell are respectively connected with the two second thermal management components in a heat conduction mode.

In the above technical scheme, the two second surfaces of the battery monomer are respectively in heat conduction connection with the two second heat management components, so that the battery monomer can realize heat exchange through the two second surfaces, the heat exchange area of the battery monomer is further distributed more uniformly, and the performance stability of the battery is further improved.

According to some embodiments of the application, the first surface is the surface of the cell having the largest area.

In the above technical scheme, the heat exchange area of the battery monomer can be further improved by enabling the first surface with the largest area of the battery monomer to be in heat conduction connection with the first heat management component, so that the heat management efficiency of the heat management device on the battery monomer is higher.

In a second aspect, the present application provides an electrical device comprising a battery as defined in any one of the preceding aspects, the battery being adapted to provide electrical energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the application;

fig. 2 is a schematic perspective view of a battery according to some embodiments of the present application;

fig. 3 is a schematic structural view of a battery cell according to some embodiments of the present application;

Fig. 4 is a schematic perspective view of a battery according to some embodiments of the present application;

fig. 5 is a schematic view of an exploded structure of a battery according to some embodiments of the present application;

fig. 6 is a schematic perspective view of a battery according to some embodiments of the present application;

fig. 7 is a schematic perspective view of a battery according to some embodiments of the present application.

Icon: 1000-vehicle; 100-cell; 10-battery cell group; 11-battery cells; 111-a first surface; 112-a second surface; 113-a third surface; 114-a fourth surface; 115-electrode terminals; 20-thermal management means; 21-a first thermal management component; 22-a second thermal management component; 23-a third thermal management component; 24-a fourth thermal management component; 241-a first sub-thermal management component; 242-a second sub-thermal management component; 26-a current collecting part; 200-a controller; 300-motor.

Detailed Description

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

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 application 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 application; the terms "comprising" and "having" and any variations thereof in the description of the application 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 application. 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 application, 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 application can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present application 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 application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, 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 application 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 application in any way.

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

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiment of the present application. The battery cell may be flat, rectangular, or other shapes, and the embodiment of the application is not limited thereto.

Reference to a battery in accordance with an embodiment of the present application refers to a single physical module that includes multiple battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery may also generally include a case for enclosing one or more battery cells or a plurality of battery modules. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive electrode plate, a negative electrode plate and a separation film. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The electrode assembly may be a wound structure or a lamination structure, and embodiments of the present application are not limited thereto.

The battery has the outstanding advantages of high energy density, small environmental pollution, large power density, long service life, wide application range, small self-discharge coefficient and the like, and is an important component of the development of new energy sources at present. With the development of new energy industry, the battery gradually develops toward large-scale and integration.

However, a large number of battery cells are stacked together, and temperature control inside the battery is critical. Excessive temperature may cause thermal runaway of the battery, resulting in reduced battery power efficiency and even failure, and may also cause deformation of the battery, affecting the safety and service life of the battery. Too low a temperature may cause abrupt changes in the internal resistance of the battery, resulting in reduced or even ineffective battery power supply efficiency, affecting the reliability and service life of the battery. Uneven temperature distribution can lead to the difference between the battery monomers to continuously expand so as to accelerate the failure of the battery, and the reliability and the service life of the battery are affected.

In some technologies, in order to reduce the influence of temperature on the battery, a thermal management component is arranged at the bottom of the battery monomer to realize heat exchange with the battery monomer, so that the problems of overhigh temperature, overlow temperature and uneven temperature distribution among the battery monomers are relieved.

However, the inventor finds that the battery with the structure occupies a larger space, has poor heat exchange effect and cannot meet the requirement of the market on the safety of the battery.

Based on the above, in order to effectively improve the safety of the battery, the inventors devised a battery including a battery cell group including a plurality of battery cells, at least two surfaces of the battery cells being thermally connected with a thermal management device for adjusting the temperature of the battery cell group.

The battery disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the electric devices. The power supply system having the battery disclosed in the present application to constitute the power utilization device may be used.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

The battery described in the embodiments of the present application is not limited to be applied to the above-described electric devices, but may be applied to all electric devices using batteries, but for simplicity of description, the following embodiments will take an electric device as an example of a vehicle.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is a schematic perspective view of a battery according to some embodiments of the application. Some embodiments of the present application provide a battery 100, including a battery cell stack 10 and a thermal management device 20, where the battery cell stack 10 includes a plurality of battery cells 11, and the thermal management device 20 is used to regulate a temperature of the battery cell stack 10, and at least two surfaces of the battery cells 11 are thermally connected to the thermal management device 20.

In some embodiments, the battery cell 11 may be flat, rectangular, or other shape.

In some embodiments, in the battery cell group 10, the plurality of battery cells 11 may be connected in series, parallel, or a series-parallel connection, where a series-parallel connection refers to both series connection and parallel connection of the plurality of battery cells 11. The plurality of battery cells 11 may be directly connected in series or parallel or in parallel, however, the battery cell group 10 may also be a form that the plurality of battery cells 11 are connected in series or parallel or in parallel to form a battery cell group module, and the plurality of battery cell group modules are connected in series or parallel or in parallel to form a whole, and the battery 100 may further include a bus component for implementing electrical connection between the plurality of battery cells 11.

Through making the heat conduction of battery monomer 11 two at least surfaces and thermal management device 20 be connected, can increase the heat transfer area of battery monomer 11 for thermal management device 20 is higher to the thermal management efficiency of battery monomer 11, and then can satisfy the cooling demand to battery 100 under the operating mode of more heavy current or more quick charge, can satisfy the heating demand to battery 100 under the environment of lower temperature, thereby can improve the security and the life of battery 100.

In some embodiments, the thermal management device 20 may include a plurality of first thermal management components 21, the plurality of first thermal management components 21 being disposed at intervals along the first direction X, at least one battery cell 11 being disposed between two adjacent first thermal management components 21.

At least one battery cell 11 is clamped between two adjacent first thermal management components 21, so that the two adjacent first thermal management components 21 can play a role in limiting and supporting the battery cell 11, the possibility of deformation caused by mutual extrusion of a plurality of battery cells 11 can be reduced, and the first thermal management components 21 can play a role in resisting expansion of the battery cell 11, thereby being beneficial to improving the structural stability of the battery 100.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a battery cell according to some embodiments of the application. In some embodiments, the battery cell 11 has two first surfaces 111 disposed opposite in the first direction X, the two first surfaces 111 of the battery cell 11 being in thermally conductive connection with the two first thermal management components 21, respectively.

The two first surfaces 111 of the battery cell 11 are respectively in heat conduction connection with the two first heat management components 21, so that the battery cell 11 can realize heat exchange through the two first surfaces 111, the heat exchange area distribution is more uniform, and the performance stability of the battery 100 is further improved.

In other embodiments, a plurality of battery cells 11 may be disposed between two adjacent first thermal management components 21, that is, only one first surface 111 of the battery cell 11 may be in thermal conductive connection with the first thermal management component 21, or the first surface 111 of the battery cell 11 is not in thermal conductive connection with the first thermal management component 21, so that the arrangement of the battery cells 11 is denser, and the energy density of the battery 100 can be improved.

Wherein, a heat insulating layer may be disposed between two adjacent battery cells 11 not separated by the first thermal management part 21, and the heat insulating layer may be made of a material having a low thermal conductivity, such as silica gel, foam plastic, mica, ceramic, and the like. Through setting up the insulating layer, can play the thermal-insulated effect between two adjacent battery monomer 11, can also play spacing, the supporting role to battery monomer 11, when single battery monomer 11 takes place thermal runaway, the insulating layer can effectively reduce thermal runaway's battery monomer 11 heat transfer to adjacent battery monomer 11's risk to effectively reduce battery 100's thermal diffusion risk, improve battery 100's reliability.

In some embodiments, the first heat managing member 21 is formed with a first heat exchanging chamber (not shown in the drawings) for accommodating a heat exchanging medium, and the first heat exchanging chambers of the plurality of first heat managing members 21 communicate with each other.

The first heat exchange chamber is for Rong Zhihuan a heat medium, which may be a liquid or a gas. In the case of cooling or lowering the temperature of the battery cells 11, the first thermal management part 21 may be used to contain a cooling medium to lower the temperature of the battery cells 11, and at this time, the first thermal management part 21 may also be referred to as a cooling part, a cooling system, a cooling plate, or the like, and the heat exchange medium contained therein may also be referred to as a cooling medium, more specifically, may be referred to as a cooling liquid or a cooling gas. In addition, the first thermal management member 21 may also be used to heat the battery cell 11, which is not limited in the embodiment. Illustratively, the first thermal management component 21 contains a cooling fluid to cool the battery cells 11.

By forming the first heat management part 21, the first heat exchange cavities of the plurality of first heat management parts are mutually communicated, and the first heat exchange cavities of the plurality of first heat management parts 21 are mutually communicated, the fluidity of the heat exchange medium in the heat exchange cavities can be effectively improved, and the heat exchange efficiency of the heat management device 20 is further improved. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of first heat exchange cavities are communicated, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

In some embodiments, a plurality of battery cells 11 arranged in a second direction Y, which is perpendicular to the first direction X, is disposed between adjacent two first thermal management members 21.

Compared with a structure in which the battery cells 11 are clamped between two adjacent first thermal management components 21 that are separately provided, the plurality of battery cells 11 arranged along the second direction Y share the two first thermal management components 21, which can simplify the structure and the production and installation process of the thermal management device 20, reduce the number of the first thermal management components 21, thereby reducing the additional structure (e.g., the installation and fixation structure) of the first thermal management components 21, and can reduce the space occupied by the additional structure of the first thermal management components 21 while saving the production cost of the battery 100, which is beneficial to improving the energy density of the battery 100.

Referring to fig. 4 and 5, fig. 4 is a schematic perspective view of a battery according to some embodiments of the present application, and fig. 5 is a schematic exploded view of a battery according to some embodiments of the present application. In some embodiments, the thermal management device 20 may further include a plurality of second thermal management components 22, where the plurality of second thermal management components 22 are spaced apart along the second direction Y, and at least one battery cell 11 is disposed between two adjacent second thermal management components 22.

At least one battery cell 11 is clamped between two adjacent second thermal management components 22, so that two adjacent second thermal management components 22 can play a role in limiting and supporting the battery cell 11, the possibility of deformation caused by mutual extrusion of a plurality of battery cells 11 can be reduced, and the second thermal management components 22 can play a role in resisting expansion of the battery cell 11, thereby being beneficial to improving the structural stability of the battery 100.

In some embodiments, the battery cell 11 has two second surfaces 112 disposed opposite in the second direction Y, the two second surfaces 112 of the battery cell 11 being in thermally conductive connection with the two second thermal management components 22, respectively.

The two second surfaces 112 of the battery cell 11 are respectively in heat conduction connection with the two second heat management components 22, so that the battery cell 11 can exchange heat through the two second surfaces 112, the heat exchange area distribution of the battery cell 11 is further more uniform, and the performance stability of the battery 100 is further improved.

In other embodiments, a plurality of battery cells 11 may be disposed between two adjacent second thermal management components 22, that is, only one second surface 112 of the battery cell 11 may be in thermal conductive connection with the second thermal management component 22, or the second surface 112 of the battery cell 11 is not in thermal conductive connection with the second thermal management component 22, so that the arrangement of the battery cells 11 is denser, and the energy density of the battery 100 can be further improved.

Wherein, a heat insulating layer may be disposed between two adjacent battery cells 11 not separated by the second thermal management part 22, and the heat insulating layer may be made of a material having a low thermal conductivity, such as silica gel, foam plastic, mica, ceramic, etc. Through setting up the insulating layer, can play the thermal-insulated effect between two adjacent battery monomer 11, can also play spacing, the supporting role to battery monomer 11, when single battery monomer 11 takes place thermal runaway, the insulating layer can effectively reduce thermal runaway's battery monomer 11 heat transfer to adjacent battery monomer 11's risk to effectively reduce battery 100's thermal diffusion risk, improve battery 100's reliability.

In some embodiments, the second thermal management component 22 is formed with a second heat exchange cavity (not shown) for containing a heat exchange medium, the second heat exchange cavity being in communication with the first heat exchange cavity.

By having the second thermal management component 22 form a second heat exchange cavity for containing the heat exchange medium, and the second heat exchange cavity is in communication with the first heat exchange cavity, the mobility of the heat exchange medium in the heat exchange cavity can be effectively improved, thereby further improving the heat exchange efficiency of the thermal management device 20. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of second heat exchange cavities are communicated with the plurality of first heat exchange cavities, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

Referring to fig. 6, fig. 6 is a schematic perspective view of a battery according to some embodiments of the application. In some embodiments, the thermal management device 20 may further include a third thermal management part 23, the third thermal management part 23 being disposed at one side of the battery cell stack 10 along the third direction Z, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

The third thermal management part 23 may correspond to all the battery cells 11 of the battery cell group 10 and serve as a support for the battery cells 11.

In other embodiments, the number of the third thermal management components 23 may be plural, and each third thermal management component 23 may correspond to one or more battery cells 11, which is not limited herein.

In some embodiments, the battery cell 11 has a third surface 113, the third surface 113 of the battery cell 11 being in thermally conductive connection with the third thermal management component 23.

The third surface 113 of the battery monomer 11 is in heat conduction connection with the third heat management component 23, so that the battery monomer 11 can exchange heat through the third surface 113, the heat exchange area of the battery monomer 11 is further distributed more uniformly, and the performance stability of the battery 100 is further improved.

In some embodiments, the third thermal management component 23 is formed with a third heat exchange chamber (not shown) for containing a heat exchange medium, the third heat exchange chamber being in communication with the first heat exchange chamber.

By enabling the third heat management component 23 to form a third heat exchange cavity which is communicated with the first heat exchange cavity, and the third heat exchange cavity is communicated with the first heat exchange cavity, the fluidity of a heat exchange medium in the heat exchange cavity can be effectively improved, and therefore the heat exchange efficiency of the heat management device 20 is further improved. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of third heat exchange cavities are communicated with the plurality of first heat exchange cavities, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

In some embodiments, the battery cell 11 further has a fourth surface 114, the fourth surface 114 is disposed opposite to the third surface 113 along the third direction Z, and the electrode terminal 115 of the battery cell 11 is disposed on the fourth surface 114.

The electrode terminals 115 are used for outputting or inputting electric energy of the battery cells 11, the two electrode terminals 115 are respectively a positive electrode terminal and a negative electrode terminal, the positive electrode terminal and the negative electrode terminal can be arranged on the fourth surface 114 of the battery cells 11 at intervals, so that the mutual connection operation of the electrode terminals 115 of the battery cells 11 is facilitated, the preparation process of the battery 100 is simplified, and the preparation difficulty of the battery 100 is reduced. In addition, the electrode terminal 115 is disposed on the fourth surface 114 of the battery cell 11, so as to effectively reduce the occupation of the electrode terminal 115 to the accommodating space surrounded by the first thermal management component 21, the second thermal management component 22 and the third thermal management component 23, and the accommodating space can be used for accommodating only the main body portion of the battery cell 11, thereby being beneficial to improving the energy density of the battery 100.

The first surface 111, the second surface 112 and the third surface 113 of the battery cell 11, on which the electrode terminals 115 are not provided, are thermally connected with the thermal management device 20 to realize heat exchange, so that the influence of the electrode terminals 115 on the heat exchange of the battery cell 11 and the thermal management device 20 can be reduced.

Referring to fig. 7, fig. 7 is a schematic perspective view of a battery according to some embodiments of the application. In some embodiments, the thermal management device 20 may further include a plurality of fourth thermal management components 24, the fourth thermal management components 24 being disposed on one side of the battery cell stack 10 along the third direction Z, the fourth surface 114 of the battery cell 11 being in thermally conductive connection with the fourth thermal management components 24.

The fourth surface 114 of the battery monomer 11 is in heat conduction connection with the fourth thermal management component 24, so that the battery monomer 11 can exchange heat through the fourth surface 114, the heat exchange area of the battery monomer 11 is further distributed more uniformly, and the performance stability of the battery 100 is further improved. And the fourth thermal management component 24 can also cooperate with the third thermal management component 23 to realize a limiting effect on the battery cell 11, and can play a role in resisting expansion of the battery cell 11, which is beneficial to improving the structural stability of the battery 100.

In some embodiments, the fourth thermal management member 24 does not overlap the electrode terminals 115 of the battery cell 11, as viewed in the third direction Z.

By making the fourth thermal management member 24 non-overlap with the electrode terminals 115 of the battery cell 11 as viewed in the third direction Z, the fourth thermal management member 24 is enabled to reduce the influence on the connection of the electrode terminals 115 with other members.

In some embodiments, a pressure relief mechanism (not shown) is provided on the fourth surface 114 of the battery cell 11, and the fourth thermal management component 24 does not overlap the pressure relief mechanism, as viewed in the third direction Z.

When the pressure release mechanism is arranged on the battery cell 11, the pressure release mechanism is opened when the pressure in the battery cell 11 is overlarge, and then the pressure inside and outside the battery cell 11 can be balanced, and the fourth thermal management component 24 and the pressure release mechanism are not overlapped through observing along the third direction Z, so that the influence of the fourth thermal management component 24 on the pressure release of the pressure release mechanism can be reduced, and the influence on the safety of the battery 100 can be reduced.

In some embodiments, the fourth thermal management component 24 is provided in plurality, the fourth thermal management component 24 extends along the first direction, and the plurality of fourth thermal management components 24 is spaced apart along the second direction.

By providing a plurality of fourth thermal management members 24, the heat exchange area of the fourth thermal management members 24 to the battery cells 11 can be made larger, and the heat exchange efficiency is higher.

In some embodiments, the fourth thermal management component 24 may include a first sub-thermal management component 241 and a second sub-thermal management component 242. Wherein the projections of the first sub-thermal management part 241 in the third direction Z fall within the projections of the two adjacent battery cells 11 in the second direction Y in the third direction Z, respectively. The projection of the second sub-thermal management part 242 in the third direction Z falls between the projections of the two electrode terminals 115 in the third direction Z.

By making the projections of the first sub-thermal management component 241 along the third direction Z fall into the projections of the two adjacent battery cells 11 along the second direction Y, respectively, so that the two adjacent battery cells 11 can exchange heat through the first sub-thermal management component 241, the heat exchange efficiency of the thermal management device 20 is further improved.

By making the projection of the second sub-thermal management part 242 in the third direction Z fall between the projections of the two electrode terminals 115 in the third direction Z, the battery cell 11 can sufficiently exchange heat through the second sub-thermal management part 242, further improving the heat exchange efficiency of the thermal management device 20.

In some embodiments, the number of the first sub-thermal management part 241 and the second sub-thermal management part 242 may be plural, and the plurality of the first sub-thermal management part 241 and the plurality of the second sub-thermal management part 242 may be staggered.

In some embodiments, the thermal management device 20 may further include a current collecting member 26, where the current collecting member 26 is connected to the fourth plurality of thermal management members 24, respectively.

Connecting the plurality of fourth thermal management members 24 through the current collecting member 26 can make the structure of the plurality of fourth thermal management members 24 more stable and make the overall structure of the battery 100 stronger.

In some embodiments, the fourth thermal management component 24 is formed with a fourth heat exchange cavity (not shown) for receiving a heat exchange medium, and the manifold component 26 is formed with a manifold (not shown) for receiving a heat exchange medium, the fourth heat exchange cavity being in communication with the manifold.

By communicating the fourth heat exchange cavities of the plurality of fourth thermal management components 24 with the manifold of the manifold component 26, the flowability of the heat exchange medium within the heat exchange cavities can be effectively improved, thereby further improving the heat exchange efficiency of the thermal management device 20. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of fourth heat exchange cavities are communicated with the manifold, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

In some embodiments, the direction of extension of the current collecting member 26 is perpendicular to the direction of extension of the fourth thermal management member 24, such that the current collecting member 26 can be connected to the ends of the plurality of fourth thermal management members 24.

In some embodiments, two current collecting members 26 are provided, the two current collecting members 26 are spaced apart along the first direction X, and both ends of the fourth thermal management member 24 are connected to the two current collecting members 26, respectively.

By providing two current collecting members 26, both ends of the fourth thermal management member 24 can be connected to the two current collecting members 26, respectively, and the fluidity of the heat exchange medium in the heat exchange chamber can be further improved, thereby further improving the heat exchange efficiency of the thermal management device 20.

In some embodiments, the fourth heat exchange cavity of the fourth thermal management component 24 communicates with the first heat exchange cavity of the first thermal management component 21.

By communicating the fourth heat exchange chamber of the fourth thermal management component 24 with the first heat exchange chamber of the first thermal management component 21, the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the thermal management device 20. Meanwhile, compared with the isolated heat exchange cavity structure, the plurality of fourth heat exchange cavities are communicated with the plurality of first heat exchange cavities, so that the number of liquid inlet and outlet structures can be reduced, the occupied space of the liquid inlet and outlet structures is further reduced, and the energy density of the battery is further improved.

In some embodiments, the first thermal management component 21, the second thermal management component 22, the third thermal management component 23 and the fourth thermal management component 24 may be plate-shaped structures, and the thickness direction of the plate-shaped structures is perpendicular to the surface of the battery cell 11 in heat conduction connection with the plate-shaped structures, so that the effective acting area of the thermal management components can be effectively increased, and the heat exchange effect of the thermal management components on the battery cell 11 can be further improved.

In other embodiments, the first thermal management component 21, the second thermal management component 22, the third thermal management component 23, and the fourth thermal management component 24 may have any shape, such as a tubular shape, with a cavity capable of accommodating a heat exchange medium, and the shape thereof may be adaptively adjusted according to the requirements of the external structure of the battery 100, the shape of the battery cell 11, and the like.

The first thermal management component 21, the second thermal management component 22, the third thermal management component 23, and the fourth thermal management component 24 may be made of a material having good thermal conductivity, such as a metal material including aluminum and copper.

The first thermal management component 21, the second thermal management component 22, the third thermal management component 23 and the fourth thermal management component 24 are further provided with an inlet and an outlet which are communicated with the heat exchange cavity, and the heat exchange medium can enter the thermal management component through the inlet and be discharged out of the thermal management component through the outlet, so that circulation of the heat exchange medium in the thermal management component and replacement of the heat exchange medium are enhanced, and heat exchange effect of the thermal management component is improved.

Referring to fig. 2, some embodiments of the present application provide a battery 100, which includes a battery cell set 10 and a thermal management device 20, wherein the battery cell set 10 includes a plurality of battery cells 11, and the thermal management device 20 is used for adjusting a temperature of the battery cell set 10, and at least two surfaces of the battery cells 11 are thermally connected with the thermal management device 20.

In some embodiments, the thermal management device 20 may include a first thermal management component 21 and a second thermal management component 22, the battery cell 11 having two first surfaces 111 disposed opposite along a first direction X and two second surfaces 112 disposed opposite along a second direction Y, at least one first surface 111 of the battery cell 11 being in thermally conductive connection with the first thermal management component 21, at least one second surface 112 of the battery cell 11 being in thermally conductive connection with the second thermal management component 22, the first direction X being perpendicular to the second direction Y.

At least one first surface 111 and at least one second surface 112 of the battery cell 11 are in heat conduction connection with the thermal management device 20, so that the battery cell 11 can exchange heat through two perpendicular surfaces, and further heat exchange in multiple directions is realized, and the reliability of heat exchange of the battery cell 11 is improved.

In some embodiments, the plurality of first thermal management components 21 are provided, the plurality of first thermal management components 21 are disposed at intervals along the first direction X, at least one battery cell 11 is disposed between two adjacent first thermal management components 21, and two first surfaces 111 of the battery cell 11 are respectively in thermal conductive connection with the two first thermal management components 21.

Compared with a structure in which the battery cells 11 are clamped between two adjacent first thermal management components 21 that are separately provided, the plurality of battery cells 11 arranged along the second direction Y share the two first thermal management components 21, which can simplify the structure and the production and installation process of the thermal management device 20, reduce the number of the first thermal management components 21, thereby reducing the additional structure (e.g., the installation and fixation structure) of the first thermal management components 21, and can reduce the space occupied by the additional structure of the first thermal management components 21 while saving the production cost of the battery, which is beneficial to improving the energy density of the battery 100.

In some embodiments, the second thermal management component 22 is provided in plurality, the plurality of second thermal management components 22 are spaced apart along the second direction Y, at least one battery cell 11 is provided between two adjacent second thermal management components 22, and two second surfaces 112 of the battery cell 11 are respectively in thermal conductive connection with the two second thermal management components 22.

In some embodiments, the first surface 111 is the surface of the largest area of the battery cells 11.

By thermally connecting the first surface 111 having the largest area of the battery cell 11 with the first thermal management component 21, the heat exchanging area of the battery cell 11 can be further increased, so that the thermal management efficiency of the thermal management device 20 on the battery cell 11 is higher.

In some embodiments, the third heat exchange cavity of the third thermal management component 23 may include a plurality of flow channels, with the width of the flow channels in the middle of the third thermal management component 23 being greater than the width of the flow channels in other portions of the third thermal management component 23.

The plurality of flow channels can be parallel or S-shaped roundabout channels.

By making the width of the flow channel of the middle part of the third thermal management part 23 larger than the width of the flow channel of the other part of the third thermal management part 23, the flow rate of the heat exchange medium passing through the flow channel of the middle part of the third thermal management part 23 can be made larger than the flow rate of the heat exchange medium passing through the flow channel of the other part of the third thermal management part 23, and then the heat exchange effect of the middle part of the third thermal management part 23 to the middle part of the battery cell group 10 is made better, thereby the problem that the middle part of the battery cell group 10 is easier to overheat can be alleviated.

In some embodiments, the thickness of the first thermal management component 21 may be less than at least one of the thickness of the second thermal management component 22, the thickness of the third thermal management component 23, the thickness of the fourth thermal management component 24.

Since the battery cell 11 may expand after a period of use and it is easier to expand from the first surface having the largest area in the battery cell 11, the first thermal management component 21 is allowed to deform under force by setting the thickness of the first thermal management component 21 smaller than at least one of the thickness of the second thermal management component 22, the thickness of the third thermal management component 23, and the thickness of the fourth thermal management component 24, so as to reserve space for the expansion of the battery cell 11.

In some embodiments, at least one of the first thermal management component 21, the second thermal management component 22, the third thermal management component 23, and the fourth thermal management component 24 is connected to the battery cell 11 by a thermally conductive adhesive.

By connecting at least one of the first thermal management component 21, the second thermal management component 22, the third thermal management component 23 and the fourth thermal management component 24 with the battery cell 11 through the heat-conducting glue, the heat exchange effect between the thermal management device 20 and the battery cell 11 can be further improved, the limiting and supporting effects of the thermal management device 20 on the battery cell 11 can be further enhanced, and the structural stability of the battery 100 can be further improved; meanwhile, the heat-conducting glue can also play a role in buffering the expansion and deformation of the battery cell 11, and is beneficial to further improving the safety of the battery 100.

In some embodiments, the first thermal management component 21, the second thermal management component 22, and the third thermal management component 23 may be integrally formed.

By integrally forming the first thermal management member 21, the second thermal management member 22, and the third thermal management member 23, the structural strength of the thermal management device 20 can be further improved, and the assembly process of the battery 100 can be advantageously simplified.

Some embodiments of the present application provide an electrical device, including a battery 100 as described in any one of the above aspects, where the battery 100 is configured to provide electrical energy.

The power utilization device may be any of the aforementioned systems or apparatuses using the battery 100.

Referring to fig. 3 and 6, some embodiments of the present application provide a battery 100, where the battery 100 includes a battery cell group 10 and a thermal management device 20, the battery cell group 10 includes a plurality of battery cells 11, and the thermal management device 20 includes a plurality of first thermal management components 21, a plurality of second thermal management components 22, a plurality of third thermal management components 23, and a plurality of fourth thermal management components 24. The plurality of battery cells 11 are respectively arranged in a matrix along a first direction X and a second direction Y, the plurality of first thermal management components 21 are arranged alternately with the plurality of battery cells 11 along the first direction X, the plurality of second thermal management components 22 are arranged alternately with the plurality of battery cells 11 along the second direction Y, the third thermal management component 23 is arranged on one side of the battery cell group 10 along a third direction Z, the plurality of fourth thermal management components 24 are arranged on the other side of the battery cell group 10 along the third direction Z, and the fourth thermal management components 24 comprise a first sub thermal management component 241 and a second sub thermal management component 242, the first sub thermal management component 241 is arranged on the shoulders of two adjacent battery cells 11 along the second direction Y, and the second sub thermal management component 242 is arranged between the two electrode terminals 115 of the battery cells 11.

The first thermal management component 21 is plate-shaped and the thickness direction is parallel to the first direction X, the second thermal management component 22 is plate-shaped and the thickness direction is parallel to the second direction Y, the third thermal management component 23 is plate-shaped and the thickness direction is parallel to the third direction Z, the fourth thermal management component 24 is plate-shaped and the thickness direction is parallel to the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

The first thermal management component 21, the second thermal management component 22, and the third thermal management component 23 are fixedly connected, the fourth thermal management component 24 is fixedly connected to end surfaces of the first thermal management component 21 and the second thermal management component 22 along the third direction Z, and the plurality of fourth thermal management components 24 are connected by the current collecting component 26.

The first thermal management component 21, the second thermal management component 22, the third thermal management component 23 and the fourth thermal management component 24 are respectively connected with the battery cells 11 through heat conducting glue.

The heat exchange cavities for accommodating the heat medium are respectively formed in the first heat management component 21, the second heat management component 22, the third heat management component 23 and the fourth heat management component 24, and the heat exchange cavities of the first heat management component 21, the second heat management component 22, the third heat management component 23 and the fourth heat management component 24 are communicated with each other.

The heat exchange chamber of the third thermal management component 23 includes a plurality of flow channels, and the width of the flow channels in the middle of the third thermal management component 23 is greater than the width of the flow channels in other portions of the third thermal management component 23.

The thickness of the first thermal management component 21 is less than the thickness of the second thermal management component 22, the thickness of the third thermal management component 23, and the thickness of the fourth thermal management component 24.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery, comprising:

a battery cell group including a plurality of battery cells;

2. The battery of claim 1, wherein the thermal management device comprises a plurality of first thermal management components spaced apart along a first direction, at least one of the battery cells being disposed between two adjacent first thermal management components;

3. The battery according to claim 2, wherein the first thermal management member is formed with a first heat exchange chamber for accommodating a heat exchange medium, the first heat exchange chambers of the plurality of first thermal management members being in communication with each other.

4. The battery according to claim 2, wherein a plurality of the battery cells arranged in a second direction perpendicular to the first direction are provided between adjacent two of the first thermal management members.

5. The battery of claim 4, wherein the thermal management device further comprises a plurality of second thermal management components, the plurality of second thermal management components being disposed at intervals along the second direction, at least one of the battery cells being disposed between two adjacent second thermal management components;

6. The battery of claim 5, wherein the first thermal management component forms a first heat exchange cavity for containing a heat exchange medium and the second thermal management component forms a second heat exchange cavity for containing a heat exchange medium, the second heat exchange cavity in communication with the first heat exchange cavity.

7. The battery according to claim 2, wherein the thermal management device further includes a third thermal management component provided on one side of the battery cell group in a third direction, the third direction being perpendicular to the first direction;

8. The battery of claim 7, wherein the first thermal management component is formed with a first heat exchange cavity for containing a heat exchange medium, and the third thermal management component is formed with a third heat exchange cavity for containing a heat exchange medium, the third heat exchange cavity in communication with the first heat exchange cavity.

9. The battery of claim 8, wherein the battery cell further has a fourth surface disposed opposite the third surface along the third direction, and wherein the electrode terminals of the battery cell are disposed on the fourth surface.

10. The battery of claim 2, wherein the battery cell further has a fourth surface, the electrode terminal of the battery cell is disposed on the fourth surface, the thermal management device further comprises a fourth thermal management component disposed on a side of the battery cell stack along a third direction, the fourth surface of the battery cell is thermally conductively connected to the fourth thermal management component, and the third direction is perpendicular to the first direction.

11. The battery of claim 10, wherein the fourth thermal management component does not overlap with electrode terminals of the battery cells as viewed in the third direction.

12. The battery of claim 10, wherein a pressure relief mechanism is provided on the fourth surface of the battery cell, the fourth thermal management component not overlapping the pressure relief mechanism as viewed in the third direction.

13. The battery of claim 10, wherein the fourth thermal management component is provided in plurality, the fourth thermal management component extends along the first direction, the plurality of fourth thermal management components is spaced apart along a second direction, and the first direction, the second direction, and the third direction are perpendicular to one another.

14. The battery of claim 13, wherein the thermal management device further comprises a manifold member connecting a plurality of the fourth thermal management members, the fourth thermal management members being formed with a fourth heat exchange cavity for receiving a heat exchange medium, the manifold member being formed with a manifold for receiving a heat exchange medium, the fourth heat exchange cavity being in communication with the manifold.

15. The battery according to claim 14, wherein two of the current collecting members are provided, the two current collecting members are spaced apart in the first direction, and both ends of the fourth thermal management member are connected to the two current collecting members, respectively.

16. The battery of claim 10, wherein the first thermal management component forms a first heat exchange cavity for containing a heat exchange medium, and the fourth thermal management component forms a fourth heat exchange cavity for containing a heat exchange medium, the fourth heat exchange cavity in communication with the first heat exchange cavity.

17. The battery of claim 1, wherein the thermal management device comprises a first thermal management component and a second thermal management component, the battery cell having two first surfaces disposed opposite in a first direction and two second surfaces disposed opposite in a second direction, at least one of the first surfaces of the battery cell being in thermally conductive connection with the first thermal management component, at least one of the second surfaces of the battery cell being in thermally conductive connection with the second thermal management component, the first direction being perpendicular to the second direction.

18. The battery of claim 17, wherein a plurality of the first thermal management components are provided, the plurality of the first thermal management components are disposed at intervals along the first direction, at least one battery cell is disposed between two adjacent first thermal management components, and two first surfaces of the battery cell are respectively in thermal conductive connection with two first thermal management components.

19. The battery of claim 17, wherein a plurality of the second thermal management components are provided, the plurality of the second thermal management components are disposed at intervals along the second direction, at least one battery cell is disposed between two adjacent second thermal management components, and two second surfaces of the battery cell are respectively in thermal conductive connection with two second thermal management components.

20. The battery of claim 2 or 17, wherein the first surface is the surface of the cell having the largest area.

21. An electrical device comprising a battery as claimed in any one of claims 1 to 20 for providing electrical energy.