WO2023029504A1

WO2023029504A1 - Battery housing, battery, and electrical device

Info

Publication number: WO2023029504A1
Application number: PCT/CN2022/087688
Authority: WO
Inventors: 郑泽禹; 刘志明; 何泽生
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2021-08-31
Filing date: 2022-04-19
Publication date: 2023-03-09
Also published as: CN216054919U; CN116569388A

Abstract

The present application relates to a battery housing, a battery, and an electrical device. The battery housing (10) comprises: a thermal management component (21) comprising a flow channel region (211) and a non-flow channel region (212), the flow channel region (211) being used to accommodate a fluid so as to adjust the temperature to a battery cell (20), and the non-flow channel region (212) being configured to not accommodate the fluid; a protection element (23), used to protect the thermal management component (21); a buffer member (22) disposed between the non-flow channel region (212) of the thermal management component (21) and the protection member (23), the buffer member (22) being disposed separated from the flow channel region (211) of the thermal management component (21).

Description

Battery box, battery and electrical device

cross reference

This application refers to the Chinese patent application No. 202122087667.8 entitled "Battery Case, Battery, and Electrical Device" filed on August 31, 2021, which is incorporated by reference in its entirety into this application.

technical field

The present application relates to the battery field, and more specifically, relates to a battery case, a battery and an electrical device.

Background technique

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

In the development of battery technology, in addition to improving the performance of batteries, safety issues are also a problem that cannot be ignored. If the safety of the battery cannot be guaranteed, the battery cannot be used. Therefore, how to enhance the safety of batteries is a technical problem to be solved urgently in battery technology.

Contents of the invention

According to various embodiments of the present application, a battery box, a battery, and an electrical device are provided.

In a first aspect, the present application provides a battery box for accommodating battery cells, the box includes: a heat management component, including a flow channel area and a non-runner area, and the flow channel area is used to accommodate a fluid to adjust the temperature of the battery cell, the non-runner region is configured not to accommodate the fluid; a protective member for protecting the thermal management component; a buffer member provided on all the thermal management components Between the non-runner region and the protective member, and the buffer member is separated from the runner region of the thermal management component.

In the technical solutions of the embodiments of the present application, a buffer member is provided inside the battery case, and the buffer member is separated from the flow channel area of the heat management component. Such a design makes the energy generated by the external collision protection component firstly absorbed by the buffer component and then transmitted to the thermal management component during the use of the box, thereby avoiding the damage to the thermal management component caused by the collision and causing safety problems; and the buffer component and The runner area of the thermal management component is set separately, which can transfer the energy on the buffer member to the non-runner area on the thermal management component, avoiding the deformation of the runner under pressure during actual use, thus effectively alleviating the deformation of the runner failure, thereby effectively avoiding the safety problem caused by the failure of the thermal management function of the battery.

In some embodiments, the buffer member includes a support portion for being supported between the non-runner region and the guard member. Such a design enables the energy on the protective member to be transmitted to the non-runner area when the box body is impacted by a collision, thereby avoiding stress and deformation of the runner area.

In some embodiments, the support portion abuts the non-runner region; and/or

The support portion is in contact with the protective member. In the embodiment of the present application, the arrangement of the supporting part in the box is flexible, as long as it is in contact with at least one of the non-runner region and the protective member.

In some embodiments, there are a plurality of support parts, and the plurality of support parts are arranged separately. By separately arranging a plurality of supporting parts, the stability of the connection between the heat management component and the protective member can be increased and the buffer performance of the buffer member can be enhanced.

In some embodiments, the buffer member further includes a connecting portion, and the connecting portion is used for connecting two adjacent supporting portions. By connecting the two connected supporting parts through the connecting part, the stability of the supporting part can be increased, and the contact area between the buffering member and the protective member can be increased, thereby improving the buffering performance of the buffering member.

In some embodiments, a plurality of the supporting parts are integrally formed with the connecting part. By integrally forming the support part and the connecting part, the difficulty of producing and assembling the buffer component can be reduced, and the reliability of the buffer component can be improved at the same time.

In some embodiments, the connecting portion abuts against the protective member, and the connecting portion is spaced apart from the flow channel area. By separating the connecting portion and the runner area, it is possible to prevent the energy at the time of collision from being directly transmitted to the runner area.

In some embodiments, the connecting portion or the supporting portion is provided with a protrusion facing the surface of the protective member, and the protrusion is used to abut against the protective member. By arranging protrusions on the surface of the connection part or the support part, the connection part and the protective member, or the support part and the protective member can be closely fitted to realize the effect of the position-limiting buffer member.

In some embodiments, there are a plurality of protrusions, and the plurality of protrusions are arranged separately. By arranging a plurality of protrusions separately, the frictional force between the connection part and the protection member, or between the support part and the protection member is increased.

In some embodiments, the thermal management component includes a connected first heat conduction plate and a second heat conduction plate, and the second heat conduction plate is located between the first heat conduction plate and the protection member, and the buffer member It is arranged between the second heat conduction plate and the protection member. By arranging a buffer member between the second heat conduction plate and the protective member and abutting the support portion on the buffer member against the second heat conduction plate, the energy generated when the box is hit is first absorbed by the buffer member and then transferred to the heat sink. management components, thereby mitigating the impact of impact on thermal management components.

In some embodiments, the second heat conduction plate includes a groove, and the groove is surrounded by the first heat conduction plate to form the flow channel area; the second heat conduction plate also includes a connection plate, and the connection The plate is used to connect with the first heat conducting plate to form the non-runner area. The groove on the second heat conduction plate and the first heat conduction plate are enclosed to form a flow channel area, which is used to accommodate the fluid for adjusting the temperature of the battery cells, and the non-flow channel area formed by the connecting plate and the first heat conduction plate is used to communicate with the first heat conduction plate. The support portion abuts, thereby absorbing the energy transmitted by the cushioning member and preventing damage to the runner area.

In some embodiments, there are multiple grooves, and the multiple grooves are arranged separately; the connecting plate is used to connect the side walls of two adjacent grooves. By alternately connecting multiple grooves and connecting plates, the heat exchange area between the thermal management component and the battery cell can be increased on the basis of ensuring the structural strength of the thermal management component.

In some embodiments, the cushioning member is foamed plastic or asbestos.

In a second aspect, the present application provides a battery, which includes a battery cell and the case provided in the first aspect of the present application, and the case is used to accommodate the battery cell.

In a third aspect, the present application provides an electric device, which includes the battery provided in the second aspect of the present application, and the battery is used to provide electric energy.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the application. Also, the same reference numerals are used to denote the same components throughout the drawings. In the attached picture:

FIG. 1 is a schematic structural view of a vehicle according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an exploded structure of a battery in some embodiments of the present application;

Fig. 3 is a schematic diagram of an exploded structure of a battery box in some embodiments of the present application;

Fig. 4 is a schematic cross-sectional structure diagram of the battery case along the Z direction in some embodiments of the present application, showing the state in which the buffer member is separately arranged;

Fig. 5 is a schematic cross-sectional structural diagram of the battery case along the Z direction in some embodiments of the present application, showing the state in which the buffer member is integrally arranged;

Fig. 6 is a schematic structural view of the protrusions of the buffer member in the battery case of some embodiments of the present application;

Fig. 7 is a schematic cross-sectional structure diagram of the battery case along the Z direction according to some embodiments of the present application.

The reference numerals in the specific embodiment are as follows:

vehicle 1000;

battery 100, controller 200, motor 300;

Box 10, first part 11, second part 12;

A battery cell 20, a thermal management component 21, a buffer member 22, and a protective member 23;

Runner area 211 , non-runner area 212 , first heat conduction plate 213 , second heat conduction plate 214 , groove 215 , connection plate 216 , support portion 221 , connection portion 222 , protrusion 223 .

Detailed ways

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the application; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to To limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the description of the above drawings are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and should not be understood as indicating or implying relative importance or implicitly indicating the number, specificity, or specificity of the indicated technical features. Sequence or primary-secondary relationship. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise specifically defined.

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 one embodiment of the present application. The occurrences of this 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 understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is only a kind of association relationship describing associated objects, which means that there may be three kinds of relationships, such as A and/or B, which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two groups (including two), and "multiple pieces" refers to More than two pieces (including two pieces).

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical" "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial", "Circumferential", etc. indicate the orientation or positional relationship based on the drawings Orientation or positional relationship is only for the convenience of describing the embodiment of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as an implementation of the present application. Example limitations.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a fixed connection. Disassembled connection, or integration; it can also be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

At present, judging from the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.

The applicant noticed that at present, the filling material between the protective member and the thermal management part of the battery box is generally selected as the honeycomb aluminum plate material, and the space between the protective member and the thermal management part is filled with the honeycomb aluminum plate, although in When the box is subjected to external impact, the honeycomb aluminum plate can act as a buffer member to absorb part of the energy of the collision, but there may still be some energy that is not absorbed by the honeycomb aluminum plate will be transferred to the heat management component and cause damage to the flow channel area in the heat management component , resulting in the failure of the thermal management function of the battery and affecting the safety performance of the battery.

In order to solve the above technical problems, the applicant provides a box for accommodating battery cells. A buffer member is provided between the non-runner area of the heat management component inside the box and the protective member, and the buffer member is in contact with the heat Manage runner zone separation settings for parts.

Based on the above technical solution, during the use of the box, the energy generated by the external collision protection component is first absorbed by the buffer component, and then transferred to the thermal management component, thereby avoiding the damage to the thermal management component caused by the collision and causing safety problems; and the buffer component Separated from the runner area of the heat management component, it can transfer the energy on the buffer member to the non-runner area of the heat management component, avoiding the deformation of the runner under pressure during actual use, thereby effectively alleviating the deformation of the runner After the battery fails, it effectively avoids the safety problem caused by the failure of the thermal management function of the battery.

The embodiment of the present application provides an electric device using a battery as a power source. The battery is used to provide electric energy for the electric device. Cars, ships, spacecraft, and more. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.

In the following embodiments, for the convenience of description, a vehicle 1000 as an electric device according to an embodiment of the present application is taken as an example for description.

Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. The interior of the vehicle 1000 is provided with a battery 100 , and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000 . The battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 . The vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating and running the vehicle 1000 .

In some embodiments of the present application, the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000 .

Please refer to FIG. 2 , which is an exploded view of a battery 100 provided by some embodiments of the present application. The battery 100 includes a case 10 and battery cells 20 housed in the case 10 . Wherein, the box body 10 is used to provide accommodating space for the battery cells 20 , and the box body 10 may adopt various structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, the first part 11 and the second part 12 jointly define a of accommodation space. The second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-like structure, and the first part 11 covers the opening side of the second part 12, so that the first part 11 and the second part 12 jointly define an accommodation space ; The first part 11 and the second part 12 can also be hollow structures with one side opening, and the opening side of the first part 11 is covered by the opening side of the second part 12 . Of course, the box body 10 formed by the first part 11 and the second part 12 can be in various shapes, such as a cylinder, a cuboid and the like.

In the battery 100 , there may be multiple battery cells 20 , and the multiple battery cells 20 may be connected in series, in parallel or in parallel. The mixed connection means that the multiple battery cells 20 are connected in series and in parallel. A plurality of battery cells 20 can be directly connected in series, in parallel or mixed together, and then the whole composed of a plurality of battery cells 20 is housed in the box 10; of course, the battery 100 can also be a plurality of battery cells 20 The battery modules are firstly connected in series or parallel or in combination, and then multiple battery modules are connected in series or in parallel or in combination to form a whole, which is accommodated in the case 10 . The battery 100 may also include other structures, for example, the battery 100 may also include a bus component for realizing electrical connection between multiple battery cells 20 .

Wherein, the battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be in the form of a cylinder, a flat body, a cuboid or other shapes.

According to some embodiments of the present application, refer to FIG. 3 , and please refer further to FIGS. 4 to 5 . Partial cross-sectional view when the component is arranged separately, and Fig. 5 is a partial cross-sectional view when the buffer member is arranged integrally. The present application provides a box body 10 . The case 10 includes a heat management component 21 , a buffer member 22 and a protective member 23 . The thermal management component 21 includes a runner area 211 and a non-runner area 212 . The flow channel area 211 is used to accommodate fluid to regulate the temperature of the battery cells 20 . The non-runner region 212 is configured not to contain the fluid. The protection member 23 is used to protect the heat management component 21 . The buffer member 22 is disposed between the non-runner region 212 of the heat management component 21 and the protection member 23 . The buffer member 22 is separated from the flow channel area 211 of the heat management component 21 .

As shown in the figure, the Z direction in the figure is the height direction of the box body 10 , the Y direction is the length direction of the box body 10 , and the X direction is the width direction of the box body 10 .

The box body 10 is a container for containing the battery cells 20 . It can be made of various materials, such as plastic, metal or composite materials. The box body 10 includes an accommodating cavity, which may specifically be in the shape of a cylinder, a cylinder, a cuboid, or the like.

The thermal management component 21 is used to contain fluid to regulate the temperature of the battery cells 20 . The fluid here may be liquid or gas, and adjusting the temperature refers to heating or cooling the battery cells 20 . In the case of cooling or lowering the temperature of the battery cell 20 , the thermal management component 21 is used to contain cooling fluid to lower the temperature of the battery cell 20 . At this time, the heat management component 21 may also be called a cooling component, a cooling system, or a cooling plate. The fluid it contains may also be referred to as cooling medium or cooling fluid. More specifically, it can be called cooling liquid or cooling gas.

Referring to FIG. 4 , the thermal management component 21 includes a runner region 211 and a non-runner region 212 . The flow channel area 211 refers to an area for containing fluid for adjusting the temperature of the battery cell 20 . During the process of heating or cooling the battery cells 20 , the fluid can circulate in the channel region, thereby transferring or taking away heat. The flow channel area 211 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. The non-runner area 212 refers to an area on the thermal management component 21 that does not contain fluid.

The protective member 23 may be located outside the thermal management component 21 for protecting the thermal management component 21 and preventing the case 10 from being damaged by directly hitting the thermal management component 21 when it is bumped. In some embodiments, the protective side plate 231 is connected to the heat management component 21 by bolts. The protective member 23 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the protective member 23 can be determined according to the specific shape and size of the thermal management component 21 . The protective member 23 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.

The buffer member 22 is a component for absorbing and transmitting the energy generated when the box body 10 is collided, and can be deformed to a certain extent when being squeezed. In order to adapt to the use environment inside the box body 10 and to facilitate installation, the buffer member 22 can be formed of a material that has heat insulation, buffer properties and is easy to process. For example, the material of the cushioning member 22 can be rigid polyurethane, rigid polyvinyl chloride, polyphenylene ether, polystyrene and the like.

Referring to FIG. 3 , "between the non-runner region 212 of the thermal management component 21 and the protective member 23" refers to the space between the non-runner region 212 of the thermal management component 21 along the negative direction of the Z direction in the figure until the protective member 23 area. The thermal management component 21 is usually subjected to a collision force parallel to the Z direction in the figure, so the deformation of the flow channel region 211 of the thermal management component 21 usually occurs on the opposite surface of the protective member 23 along the Z direction. "The buffer member 22 is separated from the flow channel area 211 of the thermal management component 21" means that there is a certain distance between the two sides of the buffer member 22 along the X direction in the figure and the side wall of the flow channel area 211 .

By setting the buffer member 22 between the non-runner area 212 of the heat management component 21 in the box body 10 and the protective member 23, the buffer member 22 can absorb part of the collision energy and transfer the remaining energy to the box body 10 during use. on the non-runner region 212 of the thermal management component 21, thereby effectively avoiding the deformation of the runner region 211 of the thermal management component 21, thereby effectively alleviating the failure of the runner after deformation, thereby effectively avoiding the thermal management function of the battery 100 Safety issues arising from failures.

According to some embodiments of the present application, in some embodiments, continuing to refer to FIG. 4 , the buffer member 22 includes a support portion 221 for supporting between the non-runner region 212 and the protection member 23 .

The support portion 221 refers to a portion of the buffer member 22 for supporting the thermal management component 21 . The support portion 221 can conduct the energy transferred from the protective member 23 to the non-runner region 212 of the thermal management component 21 , thereby relieving the deformation of the runner region 211 of the thermal management component 21 under the pressure along the Z direction in the figure.

By setting the support part 221 between the non-runner region 212 and the protective member 23, the direct contact between the thermal management component 21 and the protective member 23 can be avoided, and the runner region of the thermal management component 21 can be effectively relieved when the box body 10 is subjected to an external impact. 211 deformation problem, avoiding the failure of the thermal management function of the battery 100 caused by it.

According to some embodiments of the present application, in some embodiments, the support portion 221 abuts against the non-runner region 212 . Alternatively, the support portion 221 is in contact with the guard member 23 . Alternatively, the support portion 221 is in contact with both the non-runner region 212 and the protection member 23 .

Abutment refers to a state in which two connected parts are supported by force, that is, there is an interaction force between the two connected parts. The arrangement of the support portion 221 in the box body 10 is flexible, as long as it is in contact with at least one of the non-runner region 212 and the protective member 23 . According to some embodiments of the present application, there are a plurality of support parts 221, and the plurality of support parts 221 are arranged separately.

A plurality of support parts 221 are arranged separately from each other, and the distribution positions of the plurality of support parts 221 can be adjusted according to the stress of the thermal management component 21, so as to increase the stability of the connection between the thermal management component 21 and the protective member 23 and strengthen the buffer member 22 buffer performance.

According to some embodiments of the present application, in some embodiments, the buffer member 22 further includes a connecting portion 222 for connecting two adjacent support portions 221 .

The connecting portion 222 refers to a component on the buffer member 22 for connecting two adjacent support portions 221 . The connection part 222 can be provided with a through hole, and the support part 22 can be inserted into the through hole, and the shape of the through hole can be various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the through hole can be determined according to the specific shape and size of the support portion 221 . The connecting portion 222 is arranged along the X direction in the figure, and is perpendicular to the supporting portion 221 in a spatial position.

Connecting the two supporting parts 221 through the connecting part 222 can increase the stability of the supporting part 221 and also increase the contact area between the buffering member 22 and the protective member 23 , thereby improving the buffering performance of the buffering member 22 .

According to some embodiments of the present application, referring to FIG. 5 , the plurality of supporting parts 221 and the connecting part 222 are integrally formed.

"Multiple supporting parts 221 and connecting parts 222 are integrally formed" means that the supporting parts 221 and the connecting parts 222 are formed by the same piece of material at one time during the production process. The molding method can be physical foam molding, chemical foam molding, mechanical foam molding, etc.

By integrally forming a plurality of supporting parts 221 and connecting parts 222, the risk of size mismatch between the supporting parts 221 and connecting parts 222 can be reduced, and the difficulty of producing and assembling the cushioning member 22 can be reduced. The support part 221 and the connection part 222 may become loose during long-term use, thereby improving the reliability and buffer performance of the buffer member 22 .

According to some embodiments of the present application, in some embodiments, the connecting portion 222 abuts against the protective member 23 , and the connecting portion 222 is separated from the flow channel area 211 .

“The connecting portion 222 is in contact with the protective member 23 ” means that the connecting portion 222 is distributed between the thermal management component 21 and the protective member 23 along the Z direction in the figure, and the connecting portion 222 can directly contact the protective member 23 . "The connection part 222 is separated from the flow channel area 211" means that the connection part 222 is distributed between the heat management component 21 and the protective member 23 along the Z direction in the figure, and the connection part 222 is not connected to the flow channel area 211 of the heat management component 21. In direct contact, that is, with a certain separation distance.

By setting the connection part 222 in contact with the protective member 23 and spaced from the flow channel area 211, the connection part 222 can be realized without directly contacting the heat management component 21, so that the protective member 23 can be prevented from applying force through the connection part 222 when it is bumped. The conduction is conducted to the flow channel region 211 of the thermal management component 21 , thereby helping to prevent the thermal management component 21 from failing.

According to some embodiments of the present application, in some embodiments, the connecting portion 222 or the supporting portion 221 is provided with a protrusion 223 facing the surface of the protective member 23 , and the protrusion 223 is used to abut against the protective member 23 .

"Protrusions 223 are provided on the surface of the connecting part 222 or supporting part 221 towards the protective member 23" means that at least one of the connecting part 222 or the supporting part 221 is provided with a protrusion 223, and the protrusion 223 extends from the surface of the buffer member 22 along the Z axis in the figure The direction extends toward the protection member 23 , and the protrusion 223 can be in direct contact with the protection member 23 .

By setting the protrusion 223 on the surface of the buffer member 22, the tight fit between the buffer member 22 and the protective member 23 can be realized, so that there is a certain friction force between the protrusion 223 and the protective member 23, thereby limiting the buffer member 22 along the figure. Movement in the X or Y direction.

According to some embodiments of the present application, referring to FIG. 6 , a plurality of protrusions 223 are provided, and the plurality of protrusions 223 are arranged separately.

The plurality of protrusions 223 are spaced apart from each other, and the distribution positions of the plurality of protrusions 223 can be adjusted according to the stress on the buffer member 22 , so as to increase the frictional force between the protrusions 223 and the protective member 23 .

According to some embodiments of the present application, referring to FIG. 7 , the thermal management component 21 includes a connected first heat conduction plate 213 and a second heat conduction plate 214, and the second heat conduction plate 214 is located between the first heat conduction plate 213 and the protective member 23, The buffer member 22 is disposed between the second heat conducting plate 214 and the protection member 23 .

A thermally conductive plate refers to a plate that can be used to transfer heat. The material of the heat conduction plate can be aluminum alloy, plastic, copper and other materials that are convenient for heat transfer. The heat conducting plate can be in various shapes and sizes, which can be determined according to specific design requirements.

The “first heat conduction plate 213 ” refers to the heat conduction plate of the thermal management component 21 that is away from the buffer member 22 along the Z-axis direction in the figure. The "second heat conduction plate 214" refers to the heat conduction plate of the thermal management component 21 that is close to the buffer member 22 along the Z-axis direction in the figure. The two heat conducting plates are connected by welding, and in some embodiments, the second heat conducting plate 214 may be in contact with the buffer member 22 .

By arranging the buffer member 22 between the second heat conducting plate 214 and the protecting member 23 , the collision force on the protecting member 23 can be relieved from being directly transmitted to the second heat conducting plate 214 .

According to some embodiments of the present application, in some embodiments, the second heat conduction plate 214 includes a groove 215, and the groove 215 is surrounded by the first heat conduction plate 213 to form a flow channel area 211; the second heat conduction plate 214 also includes a connecting plate 216 , the connecting plate 216 is used to connect with the first heat conducting plate 213 to form the non-runner region 212 .

The “groove 215 ” refers to a part of the plate having a concave shape on the second heat conducting plate 214 . “Connecting plate 216 ” refers to a part of the plate on the second heat conducting plate 214 for connecting adjacent grooves 215 . The connecting plate 216 of the second heat conducting plate 214 is arranged along the X-axis direction in the figure and is connected to the first heat conducting plate 213 by welding. "The groove 215 is surrounded by the first heat conduction plate 213 to form a flow channel area 211" means that the groove 215 forms a hollow area by enclosing the first heat conduction plate 213. This area is called the flow channel area 211, the flow channel area 211 can be used to contain fluid, where the fluid can be liquid or gas. "The connection plate 216 is used to connect with the first heat conduction plate 213 to form a non-runner area 212" means that the connection area between the connection plate 216 on the second heat conduction plate 214 and the first heat conduction plate 213 is called a non-runner The area 212 is used for setting the support portion 221 of the buffer member 22 .

The groove 215 of the second heat conduction plate 214 is surrounded by the first heat conduction plate 213 to form a flow channel area 211 and the connecting plate 216 is connected to the first heat conduction plate 213 to form a non-runner area 212, so that the heat management component 21 can accommodate For cooling or heating fluid, meanwhile, the non-runner area 212 helps the buffer member 22 to protect the heat management component 21 .

According to some embodiments of the present application, in some embodiments, a plurality of grooves 215 are provided, and the plurality of grooves 215 are arranged separately; the connecting plate 216 is used to connect side walls of two adjacent grooves 215 .

By providing a plurality of grooves 215 on the second heat conducting plate 214 , the heat exchange area between the heat management component 21 and the battery cell 20 can be increased while ensuring the structural strength of the heat management component 21 .

According to some embodiments of the present application, in some embodiments, the material of the cushioning member 22 is rigid foamed plastic or asbestos.

Rigid foamed plastics refer to foamed plastics with an elastic modulus greater than 700MPa, which has the advantages of energy absorption, low thermal conductivity, and convenient molding and processing.

According to some embodiments of the present application, the present application also provides a battery 100 , including a battery cell 20 and the case body 10 provided in any one of the above embodiments, and the battery cell 20 is housed in the case body 10 .

According to some embodiments of the present application, the present application also provides an electric device, including the battery 100 described above, and the battery 100 is used to provide electric energy for the electric device.

The electric device may be any of the aforementioned devices or systems using the battery 100 .

According to some embodiments of the present application, referring to FIG. 3 , FIG. 5 to FIG. 7 , the present application provides a box body 10 . The case 10 includes a heat management component 21 , a protective member 23 and a buffer member 22 . The thermal management component 21 includes a runner area 211 and a non-runner area 212 . The buffer member 22 includes a supporting part 221 and a connecting part 222, the supporting part 221 is arranged between the non-runner area 212 and the protective member 23, the connecting part 222 abuts against the protective member 23, and a plurality of supporting parts 221 are separated from the connecting part 222 integrally formed. A plurality of protrusions 223 are disposed on the connecting portion 222 , and the plurality of protrusions 223 are spaced apart and abut against the protection member 23 .

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit it; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. All of them should be covered by the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A battery box for accommodating battery cells, the box comprising:

a thermal management component, including a runner area for containing fluid to regulate the temperature of the battery cell, and a non-runner area configured not to contain the fluid;

a protective member for protecting the thermal management component;

A buffer member is disposed between the non-runner region of the thermal management component and the protective member, and the buffer member is separated from the runner region of the thermal management component.
The case according to claim 1, wherein the buffer member includes a support portion for being supported between the non-runner region and the guard member.
The box according to claim 2, wherein the support portion abuts against the non-runner region; or

the support portion abuts against the protective member; or

The supporting portion abuts against both the non-runner area and the protective member.
The box according to claim 2 or 3, wherein there are a plurality of support parts, and the plurality of support parts are arranged separately.
The box body according to claim 4, wherein the buffer member further comprises a connecting part, and the connecting part is used to connect two adjacent supporting parts.
The box according to claim 5, wherein a plurality of the supporting parts are integrally formed with the connecting part.
The box body according to claim 5, wherein the connection part abuts against the protective member, and the connection part is separated from the flow channel area.
The box according to any one of claims 5-7, wherein a protrusion is provided on a surface of the connecting portion or the supporting portion facing the protective member, and the protrusion is used to abut against the protective member.
The box according to claim 8, wherein there are a plurality of said protrusions, and the plurality of said protrusions are arranged separately.
The box according to any one of claims 1-9, wherein the heat management component comprises a first heat conduction plate and a second heat conduction plate connected, and the second heat conduction plate is located between the first heat conduction plate and the second heat conduction plate Between the protection components, the buffer component is disposed between the second heat conducting plate and the protection components.
The box body according to claim 10, wherein the second heat conduction plate includes a groove, and the groove is surrounded by the first heat conduction plate to form the flow channel area;

The second heat conduction plate further includes a connection plate for connecting with the first heat conduction plate to form the non-runner area.
The box according to claim 11, wherein the grooves are provided in plurality, and the plurality of grooves are arranged separately;

The connecting plate is used to connect the side walls of two adjacent grooves.
The box according to any one of claims 1-12, characterized in that, the buffer member is foamed plastic or asbestos.
A battery, characterized in that it comprises:

battery cell;

The case according to any one of claims 1-13, which is used to house the battery cells.
An electric device, characterized by comprising the battery according to claim 14, the battery is used to provide electric energy.