CN221508311U - Battery, power utilization device and energy storage device - Google Patents

Abstract

The application discloses a battery, an electricity utilization device and an energy storage device. The battery comprises a heat exchange piece, a heat conduction piece and a plurality of battery monomers, wherein the first battery monomer and the second battery monomer are connected to the heat exchange piece through a heat exchange piece bonding layer, the first battery monomer comprises a first shell, the first shell comprises a first shell wall and a second shell wall, and the outer surface of the second shell wall comprises a first area for configuring the heat exchange piece bonding layer and a second area which is located at the side of the first area along a second direction; the second battery cell comprises a second shell, wherein the second shell comprises a third shell wall and a fourth shell wall, and the outer surface of the fourth shell wall comprises a third area provided with a heat exchange element bonding layer and a fourth area positioned at the side of the third area along the second direction; the first direction, the second direction and the third direction are perpendicular to each other, heat conducting pieces are assembled on the outer surfaces of the first shell wall and the third shell wall, the second area and the fourth area, and one part of the heat conducting pieces are in contact with the heat exchanging pieces. Thereby improving the heat dissipation performance of the battery.

Description

Batteries, electrical devices and energy storage devices

Technical Field

The present application relates to the field of battery technology, and in particular to batteries, electrical devices and energy storage devices.

Background Art

New energy batteries are increasingly used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are increasingly used in the field of energy storage. In new energy vehicles equipped with batteries, batteries can be used to provide power in whole or in part. In the field of energy storage, batteries can be installed in energy storage boxes or directly on the user side.

A large amount of heat is generated during the battery charging process. The accumulation of heat may affect the performance of the battery and even cause thermal runaway of the battery. Therefore, how to improve the heat dissipation performance of the battery has become one of the topics that the industry continues to research.

Utility Model Content

In order to solve the above technical problems, the present application provides a battery, an electrical device and an energy storage device, which can improve the heat dissipation performance of the battery.

This application is implemented through the following technical solutions.

A first aspect of the present application provides a battery, which includes a heat exchange member, a heat conductive member and a plurality of battery cells, wherein the plurality of battery cells include a first battery cell and a second battery cell arranged adjacent to each other along a first direction, the first battery cell and the second battery cell are respectively connected to the heat exchange member through a heat exchange member adhesive layer, the first battery cell includes a first shell, the first shell includes a first shell wall and a second shell wall adjacent to and connected to the first shell wall, the outer surface of the second shell wall includes a first area for configuring the heat exchange member adhesive layer and a second area located on the side of the first area along a second direction; the second battery cell includes a second shell, the The second shell includes a third shell wall and a fourth shell wall adjacent to and connected to the third shell wall, the outer surface of the fourth shell wall includes a third area for configuring the heat exchanger adhesive layer and a fourth area located on the side of the third area along the second direction; wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the third direction, the third direction is perpendicular to the second shell wall and the fourth shell wall, the heat conductor is assembled on the outer surface of the first shell wall, the outer surface of the third shell wall, the second area and the fourth area, and the portions of the heat conductor located in the second area and the fourth area are in contact with the heat exchanger.

Since the heat conducting parts are installed in the first shell wall, the third shell wall, the second area and the fourth area, and the parts of the heat conducting parts located in the second area and the fourth area are in contact with the heat exchanger, a part of the heat generated by the battery cell can be transferred from the first shell wall, the second shell wall, the third shell wall and the fourth shell wall to the heat exchanger, and the contact area between the heat conducting parts and the heat exchanger is large, which is conducive to the rapid heat dissipation of the battery cell, can enhance the heat dissipation effect of the battery cell, and is conducive to maintaining the temperature of the battery cell within a suitable temperature range. Moreover, compared with the case of adding heat exchangers such as water cooling plates, it is conducive to improving the volume utilization of the battery. In addition, the heat conducting parts can avoid the bonding layer of the heat exchanger when connected to the shell, reducing the impact on the bonding firmness of the heat exchanger.

In some embodiments, the heat conductor has a main body portion and an extension portion, the main body portion is connected to the extension portion, the main body portion is assembled on the first shell wall and the third shell wall; the extension portion is assembled on the second area and the fourth area.

Since the heat conducting member includes a connected main body portion and an extension portion, the heat generated by the battery cell can be quickly transferred from the first shell wall and the third shell wall to the heat exchange member, and the assembly of the heat conducting member and the shell wall is also easier and simpler.

In some embodiments, the heat conductive member includes a first heat conductive member and a second heat conductive member, the first heat conductive member includes a first main body portion and a first extension portion, the first main body portion is assembled on the first shell wall, and the first extension portion is assembled on the second area; the second heat conductive member includes a second main body portion and a second extension portion, the second main body portion is assembled on the third shell wall, and the second extension portion is assembled on the fourth area.

There are at least two heat-conducting members, so that the first heat-conducting member and the second heat-conducting member can be connected to the first battery cell and the second battery cell respectively, so that the adjacent battery cells can be heat-conducted more timely.

In some embodiments, along the first direction, one of the fourth shell wall and the second shell wall is located between the first shell wall and the third shell wall.

Thus, one of the first main body part or the second main body part can be located between the first battery cell and the second battery cell, and while the heat of the first battery cell and the second battery cell is being extracted, a heat conductive member can be provided between any two adjacent battery cells even if a plurality of battery cells are arranged in succession.

In some embodiments, along the first direction, the first main body portion and the second main body portion are located between the first shell wall and the third shell wall.

Thus, the first main body portion and the second main body portion can be located between the first battery cell and the second battery cell, and the heat of the first battery cell and the second battery cell can be removed more timely and efficiently. Moreover, the two main body portions are located between the first shell wall and the second shell wall, and the heat transfer path between the first battery cell and the second battery cell is increased, which is conducive to suppressing the heat transfer between the first battery cell and the second battery cell.

In some embodiments, the heat conducting member further includes a heat insulating layer, and the heat insulating layer is located between the first main body portion and the second main body portion.

Since the heat conductive member includes a heat insulating layer, it can better suppress the heat transfer between two adjacent battery cells, reduce the influence of the battery cell with a higher internal temperature on the adjacent battery cell, and thus reduce the risk of large-scale thermal runaway of the battery.

In some embodiments, the thermal conductor is a laminated body in which the first main body portion, the thermal insulation layer, and the second main body portion are stacked and connected into an integral whole.

Thus, a new structural component is provided, which can not only conduct heat generated by the battery cell, but also isolate the heat between adjacent battery cells. Moreover, it can be assembled to the battery cell as a structural component, which can simplify the assembly steps.

In some embodiments, the thermal conductor includes at least any one of a graphene layer, a graphite layer, a carbon nanotube layer, a silicon carbide layer, and a metal layer.

This can increase the heat transfer speed in the heat conductor and improve the thermal conductivity rate, thereby speeding up the heat dissipation rate of the battery and reducing the temperature of the battery, which is beneficial to increasing the battery's fast charging rate, shortening the charging time, and helping to improve the battery's performance.

In some embodiments, the thermal conductor includes at least any one of a graphene layer, a graphite layer, a carbon nanotube layer, a silicon carbide layer, and a metal layer; and the thermal insulation layer includes an aerogel layer or a porous vacuum silicon layer.

Thus, the heat conduction rate of the heat conducting member can be increased, thereby increasing the heat conduction rate of the battery cell, reducing the temperature of the battery cell, and helping to improve the performance of the battery. The provision of the heat insulation layer can inhibit heat transfer between two adjacent battery cells.

In some embodiments, along the first direction, the first extension portion and the second extension portion are disposed opposite to each other; or, along the first direction, the first extension portion and the second extension portion are disposed offset from each other.

The first extension portion and the second extension portion may be disposed on the same side or on different sides, so that the disposition of the extension areas of different heat-conducting components is more flexible and can be applied to battery cells whose heat exchange component adhesive layers are located in different areas.

In some embodiments, the number of the second regions is two, one second region is arranged on each side of the first region along the second direction, the number of the first extension parts is two, the two first extension parts are spaced apart along the second direction, and the two second regions are each equipped with one first extension part.

The second area is arranged on both sides of the first area along the second direction, which can evenly guide the heat of the first shell wall to the heat exchanger while avoiding the position of the heat exchanger adhesive layer. Moreover, the heat exchanger adhesive layer is located approximately in the center of the second shell wall, which is conducive to stably bonding and fixing the battery cell to the heat exchanger.

In some embodiments, the number of the fourth regions is two, and one fourth region is arranged on each side of the third region along the second direction. The number of the second extension parts is two, and the two second extension parts are spaced apart along the second direction, and each of the two fourth regions is equipped with one second extension part.

The fourth area is arranged along the second direction on both sides of the third area, which can evenly guide the heat of the third shell wall to the heat exchanger while avoiding the position of the heat exchanger adhesive layer. Moreover, the heat exchanger adhesive layer is located approximately in the center of the fourth shell wall, which is conducive to stably bonding and fixing the battery cell to the heat exchanger.

In some embodiments, a space between the two first extension portions is filled with thermally conductive silica gel, and the thermally conductive silica gel is located between the second shell wall and the heat exchange element.

As a result, the heat conduction area of the heat conducting element and the heat exchanging element is further increased, so that the heat of the battery cell can be transferred to the heat exchanging element more efficiently, thereby achieving the purpose of heat dissipation.

In some embodiments, a space between the two second extension portions is filled with thermally conductive silica gel, and the thermally conductive silica gel is located between the fourth shell wall and the heat exchange element.

As a result, the heat conduction area of the heat conducting element and the heat exchanging element is further increased, so that the heat of the battery cell can be transferred to the heat exchanging element more efficiently, thereby achieving the purpose of heat dissipation.

In some embodiments, along the first direction, the length of the first extension portion located in the second region is less than or equal to the entire length of the second region; and/or, along the first direction, the length of the second extension portion located in the fourth region is less than or equal to the entire length of the fourth region.

Thus, the contact area between the extension part and the shell wall can be increased as much as possible, the heat dissipation effect of the battery cell can be enhanced, and the battery performance can be improved. In addition, since the first extension part does not exceed the second shell wall and the second extension part does not exceed the fourth shell wall, adjacent battery cells can be arranged as close as possible, which is conducive to improving the volume utilization of the battery.

In some embodiments, the battery further includes a buffer layer disposed between the first battery cell and the second battery cell and located around the thermal conductor.

The buffer layer is arranged between the first battery cell and the second battery cell to absorb the expansion force generated by the battery cell, thereby reducing the influence of the battery cell expansion on the battery performance.

A second aspect of the present application provides an electrical device, the electrical device comprising the battery described in the first aspect of the present application, the battery being used to provide electrical energy to the electrical device.

Since the electrical device uses the battery as described above, the heat dissipation effect of the battery in the electrical device can be enhanced, which helps to increase the battery charging rate and shorten the charging time, thereby shortening the charging time of the electrical device and reducing the degree of heat generated by the battery during charging.

The third aspect of the present application provides an energy storage device, which includes the battery described in the first aspect of the present application, and the battery is used to store electrical energy and can provide electrical energy.

Since the energy storage device uses the battery as described above, the heat dissipation effect of the battery in the energy storage device can be enhanced, which helps to increase the battery charging rate and shorten the charging time, thereby shortening the charging time of the electrical device and reducing the degree of heat generated by the battery during charging.

The embodiments of the present application can provide a battery, an electrical device and an energy storage device with good heat dissipation effect.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

FIG1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

FIG2 is a schematic diagram of the structure of an energy storage device provided in some embodiments of the present application;

FIG3 is a perspective schematic diagram of a battery provided in some embodiments of the present application;

FIG4 is a perspective exploded schematic diagram of a battery cell provided in some embodiments of the present application;

FIG5 is a schematic side view of a thermally conductive and insulating pad provided in some embodiments of the present application;

FIG6 is a schematic front view of a thermally conductive and insulating pad provided in some embodiments of the present application;

FIG7 is a schematic side view of a partial structure of a battery provided in some embodiments of the present application;

FIG8 is a cross-sectional schematic diagram of A-A of FIG7 provided in some embodiments of the present application;

FIG9 is a cross-sectional schematic diagram of B-B of FIG7 provided in some embodiments of the present application;

FIG10 is a cross-sectional schematic diagram of C-C of FIG7 provided in some embodiments of the present application;

FIG11 is a schematic side view of a partial structure of a battery provided in some other embodiments of the present application;

FIG12 is a schematic side view of a partial structure of a battery provided in some other embodiments of the present application;

FIG13 is a cross-sectional schematic diagram of D-D of FIG12 provided in some other embodiments of the present application;

FIG14 is a schematic side view of a heat conducting member provided in some other embodiments of the present application;

FIG. 15 is a schematic side view of a partial structure of a battery provided in some further embodiments of the present application.

Description of Reference Numerals

1000 vehicle; 2000 energy storage device; 100 battery; 200 controller; 300 motor; 400 control unit; 10 battery cell; 20 housing; 20a upper housing; 20b lower housing; 101 electrode assembly; 102 pole ear; 103 pole column; 104 first battery cell; 105 second battery cell; 1 housing; 111 first housing wall; 112 second housing wall; 1121 first area; 1122 second area; 113 third housing wall; 114 fourth housing wall; 1141 third area; 1142 fourth area; 2 heat conductive member; 21 main body; 211 first main body; 212 second main body; 22 extension; 221 first extension; 222 second extension; 24 heat insulating layer; 25 first heat conductive member; 26 second heat conductive member; 3 heat exchange member; 31 heat exchange member bonding layer; 4 heat conductive heat insulating pad; 5 Buffer layer; X is the first direction; Y is the second direction; Z is the third direction.

DETAILED DESCRIPTION

The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", "third", "fourth", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are both allowed to have a certain degree of tolerance and/or error, including situations of being approximately parallel and approximately perpendicular.

Below, this application is described in detail.

New energy batteries are increasingly used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are increasingly used in the field of energy storage. In new energy vehicles equipped with batteries, batteries can be used to provide power in whole or in part. In the field of energy storage, batteries can be installed in energy storage boxes or directly on the user side.

With the continuous development of electric vehicles, the market demand for fast charging of batteries is getting higher and higher. A large amount of heat will be generated during the battery charging process (especially the fast charging process). The accumulation of heat may affect the performance of the battery and even cause thermal runaway of the battery. Therefore, how to enhance the heat dissipation effect of the battery has become one of the topics that the industry continues to study.

In the related art, in order to cool the battery cells, a water cooling plate is provided at the bottom of the battery cells. However, for other surfaces of the battery cells that are not in contact with the water cooling plate (such as the side perpendicular to the water cooling plate), the cooling speed is relatively slow. In the case of fast charging of the battery cells, the slow cooling speed is more obvious, and there are undesirable conditions such as obvious heating of the battery cells. Furthermore, in the related art, a thermal conductive patch is attached to the side of the battery cells, but there is still a tendency that the thermal conductivity effect is not good enough and the thermal conductivity speed is slow.

According to research, the small contact area between the heat conductor and the heat exchanger is one of the reasons for the poor heat transfer effect between the heat conductor and the heat exchanger. Therefore, it is desired to provide a heat conductor that can increase the contact area between the heat conductor and the heat exchanger, thereby improving the heat dissipation performance of the battery. In the embodiment of the present application, the heat conductor is assembled in other areas of the outer surface of the shell wall with the heat exchange adhesive layer, thereby increasing the contact area between the heat conductor and the heat exchanger, enhancing the heat dissipation effect of the battery cell, and thus enhancing the heat dissipation performance of the battery.

Based on such a design concept, the inventor of the present application has designed a battery, which includes a heat exchanger, a heat conductor and a plurality of battery cells, wherein the plurality of battery cells include a first battery cell and a second battery cell arranged adjacent to each other along a first direction, wherein the first battery cell and the second battery cell are respectively connected to the heat exchanger through a heat exchanger adhesive layer, wherein the first battery cell includes a first shell, wherein the first shell includes a first shell wall and a second shell wall adjacent to and connected to the first shell wall, wherein the outer surface of the second shell wall includes a first area for configuring the heat exchanger adhesive layer and a second area located to the side of the first area along the second direction; wherein the second battery cell includes a second shell, wherein the second shell includes a third shell wall and a fourth shell wall adjacent to and connected to the third shell wall, wherein the outer surface of the fourth shell wall includes a third area for configuring the heat exchanger adhesive layer and a fourth area located to the side of the third area along the second direction; wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the third direction, wherein the third direction is perpendicular to the second shell wall and the fourth shell wall, wherein the heat conductor is mounted on the outer surface of the first shell wall, the outer surface of the third shell wall, the second area and the fourth area, and the portions of the heat conductor located in the second area and the fourth area are in contact with the heat exchanger.

Since the heat conductor is installed in the first shell wall, the third shell wall, the second area and the fourth area, and the part of the heat conductor located in the second area and the fourth area is in contact with the heat exchanger, a part of the heat generated by the battery cell can be transferred from the first shell wall, the second shell wall, the third shell wall and the fourth shell wall to the heat exchanger. Moreover, the heat conductor can extend more into the space between the battery cell and the heat exchanger, and the contact area between the heat conductor and the heat exchanger becomes larger, which is conducive to the rapid heat dissipation of the battery cell, can enhance the heat dissipation effect of the battery cell, and is conducive to maintaining the temperature of the battery cell within a suitable temperature range. Moreover, compared with the case of adding heat exchangers such as water cooling plates, it is conducive to improving the volume utilization of the battery. In addition, the heat conductor can avoid the bonding layer of the heat exchanger when connected to the shell, reducing the impact on the bonding firmness of the heat exchanger.

The battery provided in the embodiment of the present application includes a battery module or a battery module formed by a plurality of battery cells. A plurality of battery modules can also be grouped together and used as a battery, and the battery includes a battery pack. The battery can also be used in, but not limited to, energy storage power supply systems, vehicles, ships, aircraft and other electrical devices.

The embodiment of the present application provides a thermally conductive and heat-insulating pad, which can be arranged between two heating elements. The heating element can be a battery cell or a battery module, and of course can also be other heating elements.

The embodiment of the present application provides an electric device including the above-mentioned battery for providing electric energy, and the electric device may include but is not limited to mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships and spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles and spacecraft, etc.

An embodiment of the present application provides an energy storage device of the above-mentioned battery for storing electrical energy and capable of providing electrical energy. The energy storage device may include but is not limited to an energy storage container, an energy storage cabinet, etc.

In the following embodiments, for the convenience of description, the electric device of some embodiments of the present application is described by taking a vehicle 1000 as an example. The following is a description with reference to the accompanying drawings.

FIG1 is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. As shown in FIG1 , a battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

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

FIG2 is a schematic diagram of the structure of an energy storage device 2000 provided in some embodiments of the present application. The energy storage device 2000 may be an energy storage container or an energy storage cabinet, etc. As shown in FIG2 , the energy storage device 2000 may include a battery 100 and a control unit 400, and the control unit 400 is used to control the charging and discharging of the battery 100 to ensure that the battery 100 works normally, for example, to monitor parameters such as ambient temperature and humidity.

Fig. 3 is a three-dimensional schematic diagram of a battery provided in some embodiments of the present application. As shown in Fig. 3, the battery 100 includes a box 20, which can be divided into an upper box 20a and a lower box 20b, which are mutually matched to form a layout space for the battery cells 10 therebetween.

In the battery 100, there can be multiple battery cells 10, and the multiple battery cells 10 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 10 are both connected in series and in parallel. The multiple battery cells 10 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 10 is placed in the layout space defined by the upper box 20a and the lower box 20b. Of course, the battery 100 can also be a battery module in which multiple battery cells 10 are first connected in series, in parallel, or in a mixed connection, and the multiple battery modules are then connected in series, in parallel, or in a mixed connection to form a whole, and are accommodated in the layout space defined by the upper box 20a and the lower box 20b. The battery 100 may also include other structures. For example, the battery 100 may also include a busbar (not shown in FIG. 3 ) for realizing electrical connection between the multiple battery cells 10.

In the embodiment of the present application, the battery cell 10 can be a secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., which is not limited in the embodiment of the present application. The battery cell 10 can be cylindrical, flat, rectangular or other shapes, etc., which is not limited in the embodiment of the present application. The battery cell 10 is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which is not limited in the embodiment of the present application.

FIG4 is a schematic diagram of a three-dimensional exploded view of a battery cell 10 provided in some embodiments of the present application. As shown in FIG4 , the battery cell 10 includes a shell 1 and at least one electrode assembly 101, and the shell 1 is used to encapsulate the electrode assembly 101 and components such as electrolyte. The electrode assembly 101 is provided with a tab 102, and the tab 102 can lead the current from the electrode assembly 101. The tab 102 includes a positive tab and a negative tab. The shell 1 can be a steel shell, an aluminum shell, or a composite metal shell (such as a copper-aluminum composite shell), etc.

In some embodiments, as shown in FIG4 , at least one pole 103 (two poles 103 are shown in the figure) is provided on the housing 1, and the pole 103 is electrically connected to the pole lug 102. The pole 103 can be directly connected to the pole lug 102, or indirectly connected to the pole lug 102 through a transition component. The pole 103 can be provided on the end cover, or on the housing 1.

The shell 1 may include a main shell and an end cover, and the main shell may be in various shapes, such as a cylinder, a cuboid, etc. The shape of the main shell may be determined according to the specific shape of the electrode assembly. For example, if the electrode assembly is a cylindrical structure, a cylindrical shell 1 may be selected; if the electrode assembly 101 is a cuboid structure, a cuboid shell 1 may be selected. Of course, the end cover may also be in various structures, such as a plate-like structure, a hollow structure with one end open, etc. For example, in the figure, the main shell is a cuboid structure, the end cover is a plate-like structure, and the end cover covers the opening at the top of the main shell.

In some embodiments, the pole 103 includes a positive pole and a negative pole, and the battery cell 10 may further include a pressure relief structure, and the positive pole, the negative pole and the pressure relief structure are all installed on the end cover. The positive pole and the negative pole are both used to be electrically connected to the electrode assembly 101. The pressure relief structure is used to release the pressure inside the battery cell 10 when the internal pressure or temperature of the battery cell 10 reaches a predetermined value.

Exemplarily, the pressure relief structure is located between the positive pole and the negative pole, and the pressure relief structure may be a component such as an explosion-proof valve, an explosion-proof disk, an air valve, a pressure relief valve, or a safety valve. The positive pole and the negative pole may be installed on the same end cap or on different end caps; the pressure relief structure may be installed on one end cap or on both end caps.

Below, some embodiments of the present application are described in detail with reference to FIGS. 4 to 15 .

Figure 4 is a schematic diagram of a three-dimensional exploded view of a battery cell provided in some embodiments of the present application; Figure 5 is a schematic diagram of a side view of a thermally conductive and heat-insulating pad provided in some embodiments of the present application; Figure 6 is a schematic diagram of a front view of a thermally conductive and heat-insulating pad provided in some embodiments of the present application; Figure 7 is a schematic diagram of a side view of a local structure of a battery provided in some embodiments of the present application; Figure 8 is a schematic diagram of a cross-sectional view of A-A of Figure 7 provided in some embodiments of the present application; Figure 9 is a schematic diagram of a cross-sectional view of B-B of Figure 7 provided in some embodiments of the present application; Figure 10 is a schematic diagram of a cross-sectional view of C-C of Figure 7 provided in some embodiments of the present application; Figure 11 is a schematic diagram of a side view of a local structure of a battery provided in other embodiments of the present application; Figure 12 is a schematic diagram of a side view of a local structure of a battery provided in some further embodiments of the present application; Figure 13 is a schematic diagram of a cross-sectional view of D-D of Figure 12 provided in some further embodiments of the present application; Figure 14 is a schematic diagram of a side view of a heat-conducting member provided in some further embodiments of the present application; Figure 15 is a schematic diagram of a side view of a local structure of a battery provided in some further embodiments of the present application.

In the description of the embodiments of the present disclosure, for the convenience of explanation, the direction of the arrow X is used to represent the “first direction”, “perpendicular to the direction of the first shell wall”, and “perpendicular to the direction of the third shell wall”; the direction of the arrow Y is used to represent the “second direction”; and the direction of the arrow Z is used to represent the “third direction”, “perpendicular to the direction of the second shell wall”, and “perpendicular to the direction of the fourth shell wall”.

In the first aspect, as shown in FIGS. 4 to 14 , the present application provides a battery 100, which includes a heat exchange member 3, a heat conductive member 2 and a plurality of battery cells 10, wherein the plurality of battery cells 10 include a first battery cell 104 and a second battery cell 105 arranged adjacent to each other along a first direction X, wherein the first battery cell 104 and the second battery cell 105 are respectively connected to the heat exchange member 3 through a heat exchange member adhesive layer 31, wherein the first battery cell 104 includes a first shell, wherein the first shell includes a first shell wall 111 and a second shell wall 112 adjacent to and connected to the first shell wall 111, wherein an outer surface of the second shell wall 112 includes a first area 1121 for configuring the heat exchange member adhesive layer 31 and a second area 1122 located to the side of the first area 1121 along a second direction Y; The battery cell 105 includes a second shell, the second shell includes a third shell wall 113 and a fourth shell wall 114 adjacent to and connected to the third shell wall 113, the outer surface of the fourth shell wall 114 includes a third area 1141 for configuring a heat exchanger adhesive layer 31 and a fourth area 1142 located on the side of the third area 1141 along the second direction Y; wherein the first direction X and the second direction Y are perpendicular to each other and are both perpendicular to the third direction Z, the third direction Z is perpendicular to the second shell wall 112 and the fourth shell wall 114, the heat conductor 2 is assembled on the outer surface of the first shell wall 111, the outer surface of the third shell wall 113, the second area 1122 and the fourth area 1142, and the portions of the heat conductor 2 located in the second area 1122 and the fourth area 1142 are in contact with the heat exchanger 3.

As shown in Figures 7 and 8, the battery includes a heat exchange member 3, a heat conductive member 2 and a plurality of battery cells 10. Along a first direction X, the plurality of battery cells 10 include a first battery cell 104 and a second battery cell 105 arranged adjacent to each other. The first battery cell 104 and the second battery cell 105 are respectively connected to the heat exchange member 3 through a heat exchange member adhesive layer 31. The heat exchange member 3 is used to exchange heat with the battery cells 10, wherein the first direction X is perpendicular to the first shell wall 111 of the first battery cell 104, and the first direction X is perpendicular to the third shell wall 113 of the second battery cell 105.

As shown in FIG7 , the heat exchanger 3 is used to exchange heat with the battery cell 10. Optionally, the heat exchanger 3 may be a liquid cooling plate, a water cooling plate or other device capable of achieving heat exchange. In a specific embodiment, the heat exchanger 3 is a water cooling plate, and a flow channel for the flow of heat exchange medium such as water is formed inside the heat exchanger 3. The water inlet and the water outlet may be connected to the upstream and downstream sections of the flow channel, respectively. Water with a lower temperature may flow in from the water inlet, and exchange heat with the battery cell outside the flow channel while flowing, and then the water heated by the heat exchange flows out from the water outlet. In this way, the heat dissipation effect of the battery cell 10 can be effectively improved, the temperature of the battery cell 10 can be reduced, and the stability and reliability of the battery cell 10 can be improved.

As shown in FIG7 , the heat conducting member 2 is used to conduct heat from the battery cell 10, and the heat conducting member 2 can transfer the heat conducted from the battery cell to the heat exchange member 3. The material of the heat conducting member 2 can be graphene, graphite, carbon nanotubes, silicon carbide (SIC), metal materials or other high thermal conductivity materials.

Optionally, as shown in FIG3 , there are at least two battery cells 10 , which may be two, three, four or five. The battery cells 10 may include a first battery cell 104 and a second battery cell 105 . The first battery cell 104 and the second battery cell 105 may be arranged adjacent to each other and both connected to the heat exchange element 3 .

Optionally, the first battery cell 104 and the second battery cell 105 may be connected to two heat exchangers 3 respectively, or may be connected to the same heat exchanger 3. In a specific embodiment, as shown in FIG. 7 , the first battery cell 104 and the second battery cell 105 are connected to the same heat exchanger 3.

The heat exchanger 3 and the battery cell 10 can be connected by bonding, and the bonding method can be bonding by forming a bonding layer through an adhesive or by forming a bonding layer through a tape, etc., as long as it does not affect the heat transfer between the two.

The first battery cell 104 includes a first shell, and the first shell includes a first shell wall 111 and a second shell wall 112 adjacent to and connected to the first shell wall 111. The shell includes a plurality of shell walls. For the convenience of description, two adjacent and connected shell walls among the plurality of shell walls are named "first shell wall 111" and "second shell wall 112" respectively. In some specific embodiments, the shell wall with the largest area in the shell is used as the first shell wall, and the shell wall in the shell installed on the heat exchanger 3 is used as the second shell wall.

Optionally, the shape of the first shell can be a cylinder, a cuboid, a polygonal prism or other shapes, and the polygonal prism is, for example, a hexagonal prism, etc., which is not limited in this embodiment. In a specific embodiment, a cuboid shell is taken as an example for description.

As shown in Figure 9, the outer surface of the second shell wall 112 includes a first area 1121 and a second area 1122. The first area 1121 is used to configure the heat exchange component bonding layer 31. Along the second direction Y, the second area 1122 is located on the side of the first area 1121, wherein the first direction X is perpendicular to the first shell wall 111, and the second direction Y is perpendicular to the first shell wall 111 and perpendicular to the second shell wall 112.

Along the second direction Y, the side of the first region 1121 includes one side or two sides.

Optionally, in the outer surface of the second shell wall 112, along the second direction Y, except for the first area 1121, the remaining side areas of the first area 1121 can be the second area 1122, or a part of the side area of the remaining first area 1121 can be the second area 1122. Along the second direction Y, the second area 1122 can be the side area of one side of the first area 1121. In this case, the shape of the heat conductor can be as shown in Figure 14. Of course, along the second direction Y, the two end areas of the extension part may not be flush with the two end parts of the main body. For example, along the second direction Y, the extension part is appropriately indented relative to the edge of the main body. The second area 1122 can also be the side areas on both sides of the first area 1121. In this case, the shape of the heat conductor can be as shown in Figure 6. Of course, along the second direction, the two end areas of the extension part may not be flush with the two end parts of the main body. For example, along the second direction Y, the extension part is appropriately indented relative to the edge of the main body. The above embodiments are only for illustration and have no limiting effect on the present application. In a specific embodiment, as shown in FIG. 9 , the second area 1122 is the side areas on both sides of the first area 1121 .

Optionally, along the second direction Y, the first area 1121 may be a middle area of the outer surface of the second shell wall 112; or, along the second direction Y, the first area 1121 may be an area of the outer surface of the second shell wall 112 close to one end thereof; of course, along the second direction Y, the first area 1121 may be located in other areas of the outer surface of the second shell wall 112. In a specific embodiment, along the second direction Y, the first area 1121 is substantially a middle area of the outer surface of the second shell wall 112.

The shapes of the first region 1121 and the second region 1122 may be the same or different. The areas of the first region 1121 and the second region 1122 may be the same or different. In a specific embodiment, the first region 1121 and the second region 1122 are both rectangular, but the areas of the first region 1121 and the second region 1122 are different.

As shown in FIG7 , the second battery cell 105 includes a second shell, and the second shell includes a third shell wall 113 and a fourth shell wall 114 adjacent to and connected to the third shell wall 113. The shell includes a plurality of shell walls, and for the convenience of description, two adjacent and connected shell walls among the plurality of shell walls are named “third shell wall 113” and “fourth shell wall 114”, respectively. In some specific embodiments, the shell wall with the largest area in the shell is used as the third shell wall, and the shell wall in the shell installed on the heat exchanger 3 is used as the fourth shell wall.

Optionally, the second shell may be in a cylindrical, rectangular, polygonal or other shapes, and the polygonal is, for example, a hexagonal, etc., which is not limited in this embodiment. In a specific embodiment, a rectangular shell is taken as an example for description.

As shown in Figure 10, the outer surface of the fourth shell wall 114 includes a third area 1141 and a fourth area 1142. The third area 1141 is used to configure the heat exchange component bonding layer 31. Along the second direction Y, the fourth area 1142 is located on the side of the third area 1141. The second direction Y is perpendicular to the third shell wall 113 and perpendicular to the fourth shell wall 114.

Along the second direction Y, the side of the third region 1141 includes one side or two sides.

Optionally, in the outer surface of the fourth housing wall 114, along the second direction Y, except for the third area 1141, the remaining lateral areas of the third area 1141 may be the fourth area 1142, or a portion of the lateral areas of the remaining third area 1141 may be the fourth area 1142. Along the second direction Y, the fourth area 1142 may be the lateral area on one side of the third area 1141, and the fourth area 1142 may be the lateral areas on both sides of the third area 1141. In a specific embodiment, the fourth area 1142 is the lateral areas on both sides of the third area 1141.

Optionally, along the second direction Y, the third area 1141 may be a middle area of the outer surface of the fourth housing wall 114; along the second direction Y, the third area 1141 may be an area of the outer surface of the fourth housing wall 114 close to one end thereof; of course, along the second direction Y, the third area 1141 may be located in other areas of the outer surface of the fourth housing wall 114. In a specific embodiment, along the second direction Y, the third area 1141 is substantially a middle area of the outer surface of the fourth housing wall 114.

The shapes of the third region 1141 and the fourth region 1142 may be the same or different. The areas of the third region 1141 and the fourth region 1142 may be the same or different. In a specific embodiment, the shapes of the third region 1141 and the fourth region 1142 are both rectangular, but the areas of the third region 1141 and the fourth region 1142 are different.

As shown in Fig. 7 to Fig. 13, the heat conducting member 2 is mounted on the first housing wall 111, the third housing wall 113, the second region 1122 and the fourth region 1142. The heat conducting member 2 may occupy the entire area of the outer surface of the first housing wall 111, the outer surface of the third housing wall 113, the second region 1122 or the fourth region 1142, or the heat conducting member 2 may occupy a portion of the outer surface of the first housing wall 111, the outer surface of the third housing wall 113, the second region 1122 or the fourth region 1142.

Since the heat conductive member 2 is assembled on the first shell wall 111, the third shell wall 113, the second area 1122 and the fourth area 1142, and the portion of the heat conductive member 2 located in the second area 1122 and the fourth area 1142 is in contact with the heat exchange member 3, a part of the heat generated by the battery cell can be transferred from the first shell wall 111, the second shell wall 112, the third shell wall 113 and the fourth shell wall 114 to the heat exchange member 3, and the contact area between the heat conductive member 2 and the heat exchange member 3 is large, which is conducive to the rapid heat dissipation of the battery cell, can enhance the heat dissipation effect of the battery cell, and is conducive to maintaining the temperature of the battery cell within a suitable temperature range. Moreover, compared with the case of adding a heat exchange member such as a water cooling plate, it is conducive to improving the volume utilization rate of the battery. In addition, the heat conductive member can avoid the heat exchange member bonding layer when connected to the shell, reducing the impact on the bonding firmness of the heat exchange member.

In some embodiments, as shown in Figures 5 to 13, the heat conductor 2 has a main body portion 21 and an extension portion 22, the main body portion 21 is connected to the extension portion 22, the main body portion 21 is assembled on the first shell wall 111 and the third shell wall 113; the extension portion 22 is assembled in the second area 1122 and the fourth area 1142.

In a specific embodiment, the heat conducting member 2 is one, the first shell wall 111 and the third shell wall 113 can be arranged adjacent to each other, the main body 21 is located between the first shell wall 111 and the third shell wall 113, and the main body 21 can be bonded to at least any one of the first shell wall 111 and the third shell wall 113. In a heat conducting member 2, two extension portions 22 extend from the main body 21. Optionally, the two extension portions extend to the second region 1122 and the fourth region 1142, respectively, that is, the two extension portions extend in opposite directions after being bent; or, the two extension portions both extend to the second region 1122 or both extend to the fourth region 1142, that is, the two extension portions extend in the same direction after being bent.

In another specific embodiment, as shown in Figure 11, there are two heat conducting members 2, the first shell wall 111 and the third shell wall 113 can be arranged adjacent to each other, the two main body parts 21 are stacked along the first direction X and are located between the first shell wall 111 and the third shell wall 113, and the two main body parts 21 respectively extend extension parts 22, the extension part 22 extending from one of the main body parts extends to the second area 1122, and the extension part 22 extending from the other main body part extends to the fourth area 1142.

In another specific embodiment, as shown in FIG12 , there are two heat conducting members 2, the first shell wall 111 and the third shell wall 113 are not arranged adjacent to each other, the two main body portions 21 are respectively located at the first shell wall 111 and the third shell wall 113, the two main body portions 21 respectively extend extension portions 22, and the extension portions 22 respectively extend to the second area 1122 and the fourth area 1142.

The above is only an exemplary description. If the first battery cell, the second battery cell and the heat conducting member are regarded as a unit, the battery may include a plurality of such units.

In addition, the above-mentioned embodiment shows that the heat conductive member is arranged on a first shell wall and a second shell wall of the first battery cell. As shown in Figure 15, the main body of the heat conductive member 2 is arranged on two first shell walls opposite to each other (the figure shows the first main body 211 on both sides), and the second shell wall is equipped with extension parts extending from the main body on both sides (the figure shows the first extension parts 221 on both sides), and the extension length of the extension part on one side may not exceed the middle part of the second shell wall.

The main body 21 and the extension 22 may be an integral structure. The extension 22 is bent relative to the main body 21 and mounted on the second region 1122 of the second housing wall 112 or the fourth region 1142 of the fourth housing wall 114. In addition, the main body 21 may also include a portion mounted on other housing walls.

In some embodiments, as shown in FIG. 5 and FIG. 6 , the main body portion 21 is in the shape of a plate, and the main body portion 21 is directly and substantially parallelly connected to the outer surface of the first housing wall 111 .

In some embodiments, the area where the main body 21 is connected to the outer surface of the first shell wall 111 may be smaller than the area of the outer surface of the first shell wall 111, or may be substantially equal to the area of the outer surface of the first shell wall 111. As shown in FIG7 and FIG8, in a specific embodiment, the area where the main body 21 is connected to the outer surface of the first shell wall 111 is substantially equal to the area of the outer surface of the first shell wall 111, and the imaginary projection of the main body 21 along the thickness direction of the first shell wall 111 falls into the outer surface of the first shell wall 111. Since the contact area between the main body 21 and the shell of the battery cell is large, the heat transfer effect is good, and the heat dissipation effect can be improved.

In some embodiments, the area where the main body 21 is connected to the outer surface of the third shell wall 113 may be smaller than the area of the outer surface of the third shell wall 113, or may be substantially equal to the area of the outer surface of the third shell wall 113. As shown in FIG8 , in a specific embodiment, the area where the main body 21 is connected to the outer surface of the third shell wall 113 is substantially equal to the area of the outer surface of the third shell wall 113, and the projection of the main body 21 along the thickness direction of the third shell wall 113 falls into the outer surface of the third shell wall 113. Since the contact area between the main body 21 and the shell 1 of the battery cell is large, the heat transfer effect is good, and the heat dissipation effect can be improved.

In some embodiments, as shown in FIG. 6 , the extension portion 22 is in the shape of a plate, and the extension portion 22 is substantially connected to the second region 1122 or the fourth region 1142 in parallel.

7 , the area of the extension portion 22 connected to the second region 1122 may be smaller than the area of the second region 1122, or may be substantially equal to the area of the second region 1122. In a specific embodiment, the projection of the extension portion 22 along the thickness direction of the second housing wall 112 falls within the outer surface of the second housing wall 112.

7 , the area of the extension portion 22 connected to the fourth region 1142 may be smaller than the area of the fourth region 1142, or may be substantially equal to the area of the fourth region 1142. In a specific embodiment, the projection of the extension portion 22 along the thickness direction of the second housing wall 112 falls into the outer surface of the second housing wall 112.

As shown in Figure 7, the main body 21 is installed on the outer surfaces of the first shell wall 111 and the third shell wall 113, and the extension part 22 is installed in the second area 1122 and the fourth area 1142, wherein the installation method can be bonding, welding or other installation methods as long as it does not affect the heat transfer between the two.

In some embodiments, as shown in FIG. 14 , one main body portion 21 may have one extension portion 22 ; as shown in FIG. 6 , one main body portion 21 may have two extension portions 22 ; of course, one main body portion 21 may also have more extension portions 22 .

The heat conductor includes a main body and an extension portion, which can guide the heat released from the surface of the battery cell adjacent to the heat exchanger 3 to the heat exchanger 3 more quickly, thereby dissipating the heat quickly. Moreover, the assembly of the heat conductor and the shell wall is also easy and simple.

In some embodiments, as shown in Figures 7 to 13, the heat-conducting member 2 includes a first heat-conducting member 25 and a second heat-conducting member 26, the first heat-conducting member 25 includes a first main body portion 211 and a first extension portion 221, the first main body portion 211 is assembled on the first shell wall 111, and the first extension portion 221 is assembled on the second area 1122; the second heat-conducting member 26 includes a second main body portion 212 and a second extension portion 222, the second main body portion 212 is assembled on the third shell wall 113, and the second extension portion 222 is assembled on the fourth area 1142.

The shapes, sizes and materials of the first heat conducting member 25 and the second heat conducting member 26 may be the same or different. In a specific embodiment, the structures of the first heat conducting member 25 and the second heat conducting member 26 are substantially the same.

In a specific embodiment, during assembly, the first heat conducting member 25 and the second heat conducting member 26 can be connected into an integral member, and the integral member is sequentially or simultaneously bonded to the first housing wall 111 and the third housing wall 113. Furthermore, the first extension portion 221 and the second extension portion 222 are bent and bonded to the second housing wall 112 and the fourth housing wall 114, respectively.

The heat conducting member includes a first heat conducting member 25 and a second heat conducting member 26 , which can connect the first heat conducting member 25 and the second heat conducting member 26 to the first battery cell 104 and the second battery cell 105 , respectively, so that the adjacent battery cells can be heat-conducted more timely.

In some embodiments, as shown in FIG. 12 , along the first direction X, one of the fourth housing wall 114 and the second housing wall 112 is located between the first housing wall 111 and the third housing wall 113 .

Along the first direction X, as shown in FIG. 12 , the fourth housing wall 114 is located between the first housing wall 111 and the third housing wall 113 , or the second housing wall 112 is located between the first housing wall 111 and the third housing wall 113 .

As shown in Figure 12, in a specific embodiment, the first shell wall 111 and the third shell wall 113 are not arranged adjacent to each other, the fourth shell wall 114 is located between the first shell wall 111 and the third shell wall 113, the first main body 211 is assembled on the first shell wall 111, the first extension part 221 is assembled on the second area 1122, the second main body 212 is assembled on the third shell wall 113, and the second extension part 222 is assembled on the fourth area 1142; in another specific embodiment, the first shell wall 111 and the third shell wall 113 are not arranged adjacent to each other, the second shell wall 112 is located between the first shell wall 111 and the third shell wall 113, the first main body 211 is assembled on the first shell wall 111, the first extension part 221 is assembled on the second area 1122, the second main body 212 is assembled on the third shell wall 113, and the second extension part 222 is assembled on the fourth area 1142.

Thus, one of the first main body portion 211 or the second main body portion 212 can be located between the first battery cell 104 and the second battery cell 105, and while the heat of the first battery cell 104 and the second battery cell 105 is extracted, even if a plurality of battery cells are arranged in succession, a heat conductive member 2 can be provided between any two adjacent battery cells.

In some embodiments, as shown in FIG. 11 , along the first direction X, the first body portion 211 and the second body portion 212 are located between the first housing wall 111 and the third housing wall 113 .

As shown in Figure 11, in a specific embodiment, the first shell wall 111 and the third shell wall 113 can be arranged adjacent to each other, the first main body portion 211 and the second main body portion 212 are stacked along the first direction X and are located between the first shell wall 111 and the third shell wall 113, the first extension portion 221 is assembled in the second area 1122, and the second extension portion 222 is assembled in the fourth area 1142.

Thus, the first main body portion 211 and the second main body portion 212 can be located between the first battery cell 104 and the second battery cell 105, so that the heat of the first battery cell 104 and the second battery cell 105 can be more timely and efficiently removed. And the two main body portions are located between the first shell wall 111 and the third shell wall 113, and the heat transfer path between the first battery cell 104 and the second battery cell 105 is increased, which is conducive to suppressing the heat transfer between the first battery cell 104 and the second battery cell 105.

In some embodiments, as shown in FIG. 7 , the heat conducting member further includes a heat insulating layer 24 , and the heat insulating layer 24 is located between the first main body portion 211 and the second main body portion 212 .

The heat insulation layer 24 may be made of a low thermal conductivity material, such as aerogel or porous vacuum silicon, to isolate heat conduction between battery cells.

As shown in FIG8 , perpendicular to the first direction X, the surface area of the heat insulating layer 24 and the surface area of the main body 21 may be the same or different. In a specific embodiment, the projection of the heat insulating layer 24 along the thickness direction of the first shell wall 111 falls into the main body 21 .

The heat conductive member 2 includes a heat insulating layer 24, which is beneficial to blocking the heat between two adjacent battery cells and can inhibit the heat of the battery cell with a higher temperature from being transferred to the adjacent battery cell, thereby reducing the risk of thermal runaway of the battery.

In some embodiments, as shown in FIG. 7 , the heat conducting member 2 is a laminated body in which a first main body portion 211 , a heat insulating layer 24 , and a second main body portion 212 are stacked and connected into one body.

The first main body part 211, the heat insulating layer 24 and the second main body part 212 can be directly an integrated structure, wherein the first main body part 211, the heat insulating layer 24 and the second main body part 212 can be connected by bonding, welding or other connection methods.

Thus, a new structural component is provided, which can not only conduct heat generated by the battery cell, but also isolate the heat between adjacent battery cells. Moreover, it can be assembled to the battery cell as a structural component, which can simplify the assembly steps.

In some embodiments, as shown in FIG. 7 , the heat conductor 2 includes at least any one of a graphene layer, a graphite layer, a carbon nanotube layer, a silicon carbide layer, and a metal layer.

In some embodiments, the heat conductor 2 may include one of a graphene layer, a graphite layer, a carbon nanotube layer, a silicon carbide layer, and a metal layer; the heat conductor 2 may include two of the graphene layer, the graphite layer, the carbon nanotube layer, the silicon carbide layer, and the metal layer; the heat conductor 2 may include three of the graphene layer, the graphite layer, the carbon nanotube layer, the silicon carbide layer, and the metal layer, etc. No further description is given here.

As a result, the heat transfer speed in the heat conductor 2 is increased, the heat conduction rate is improved, thereby accelerating the heat dissipation rate of the battery, reducing the temperature of the battery, increasing the fast charging rate of the battery, shortening the charging time, and improving the performance of the battery.

In some embodiments, as shown in FIG7 , the heat conductor 2 includes at least one of a graphene layer, a graphite layer, a carbon nanotube layer, a silicon carbide layer, and a metal layer; the heat insulating layer 24 includes an aerogel layer or a porous vacuum silicon layer. The heat conductor 2 includes a main body portion 21 and an extension portion 22 of the heat conductor 2 .

In some embodiments, the heat conductor 2 may include one of the graphene layer, graphite layer, carbon nanotube layer, silicon carbide layer, and metal layer; the heat conductor 2 may include two of the graphene layer, graphite layer, carbon nanotube layer, silicon carbide layer, and metal layer; the heat conductor may include three of the graphene layer, graphite layer, carbon nanotube layer, silicon carbide layer, and metal layer, etc. When the heat conductor 2 is multi-layered, the multi-layered heat conductor 2 may be made of the same material, or different materials, or a portion of the multi-layered heat conductor 2 may be made of the same material, and another portion of the heat conductor 2 may be made of different materials.

The heat insulating layer 24 may include an aerogel layer, may include a porous vacuum silicon layer, or may include both an aerogel layer and a porous vacuum silicon layer.

In some embodiments, as shown in FIGS. 7 and 8 , along the first direction X, the first extension portion 221 and the second extension portion 222 are disposed opposite to each other; or, along the first direction X, the first extension portion 221 and the second extension portion 222 are disposed offset from each other.

In some embodiments, as shown in Figures 7 and 8, along the first direction X, the position of the first extension portion 221 on the second shell wall 112 corresponds to the position of the second extension portion 222 on the fourth shell wall 114, that is, when observing the first extension portion 221 and the second extension portion 222 along the first direction X, the first extension portion 221 and the second extension portion 222 completely overlap.

In other embodiments, along the first direction X, the position of the first extension portion 221 on the second shell wall 112 is completely staggered with the position of the second extension portion 222 on the fourth shell wall 114, that is, when the first extension portion 221 and the second extension portion 222 are observed along the first direction X, there is no overlap between the first extension portion 221 and the second extension portion 222.

In some other embodiments, along the first direction X, the position of the first extension portion 221 on the second shell wall 112 is partially staggered with the position of the second extension portion 222 on the fourth shell wall 114, that is, when the first extension portion 221 and the second extension portion 222 are observed along the first direction X, the first extension portion 221 and the second extension portion 222 partially overlap.

The first extension portion 221 and the second extension portion 222 can be located in the same area or different areas of the shell wall, making the setting of the extension areas of different heat-conducting components more flexible and applicable to battery cells with heat exchange component adhesive layers 31 located in different areas.

In some embodiments, as shown in Figure 9, the number of second regions 1122 is two, and one second region 1122 is arranged on both sides of the first region 1121 along the second direction Y. The number of first extension portions 221 is two, and the two first extension portions 221 are spaced apart along the second direction Y, and each of the two second regions 1122 is equipped with a first extension portion 221.

The shapes or sizes of the two second regions 1122 may be the same or different. The two second regions 1122 may be adjacent to the two ends of the outer surface of the second shell wall 112 along the second direction Y respectively; the two second regions 1122 may also be at a certain distance from the two ends of the outer surface of the second shell wall 112 along the second direction Y respectively; or one of the second regions 1122 may be adjacent to one end of the outer surface of the second shell wall 112 along the second direction Y along the second direction Y, and the other second region 1122 may be at a certain distance from the other end of the outer surface of the second shell wall 112 along the second direction Y along the second direction Y. In a specific embodiment, the two second regions 1122 have the same shape and size, both are rectangular, and the two second regions 1122 are adjacent to the two ends of the outer surface of the second shell wall 112 along the second direction Y respectively.

Generally, the heat exchanger adhesive layer 31 is located in the middle area of the outer surface of the shell wall, and the second area 1122 is set to be arranged on both sides of the first area 1121 along the second direction Y. This can enable the first extension portion 221 to better avoid the position of the heat exchanger adhesive layer 31, while increasing the contact area between the heat conductor and the second area 1122, and making the heat conduction balanced, thereby enhancing the heat dissipation effect of the battery cell and improving the heat dissipation performance of the battery.

The second area is arranged on both sides of the first area along the second direction, which can evenly guide the heat of the first shell wall to the heat exchanger while avoiding the position of the heat exchanger adhesive layer. Moreover, the heat exchanger adhesive layer is located approximately in the center of the second shell wall, which is conducive to stably bonding and fixing the battery cell to the heat exchanger.

In some embodiments, as shown in Figure 10, the number of fourth regions 1142 is two, and one fourth region 1142 is arranged on both sides of the third region 1141 along the second direction Y. The number of second extension portions 222 is two, and the two second extension portions 222 are spaced apart along the second direction Y, and each of the two fourth regions 1142 is equipped with a second extension portion 222.

Optionally, the shapes or sizes of the two fourth regions 1142 may be the same or different. The two fourth regions 1142 may be adjacent to the two ends of the outer surface of the fourth shell wall 114 along the second direction Y respectively; the two fourth regions 1142 may also be at a certain distance from the two ends of the outer surface of the fourth shell wall 114 along the second direction Y respectively; or one of the fourth regions 1142 may be adjacent to one end of the outer surface of the fourth shell wall 114 along the second direction Y, and the other fourth region 1142 may be at a certain distance from the other end of the outer surface of the fourth shell wall 114 along the second direction Y. In a specific embodiment, the two third regions 1141 have the same shape and size, both of which are cuboids, and the two fourth regions 1142 may be adjacent to the two ends of the outer surface of the fourth shell wall 114 along the second direction Y respectively.

Generally, the heat exchanger adhesive layer 31 is located in the middle area of the outer surface of the shell wall, and the fourth area 1142 is set to be arranged on both sides of the third area 1141 along the second direction Y. This can enable the second extension portion 222 to better avoid the position of the heat exchanger adhesive layer 31, while increasing the contact area between the heat conductor and the fourth area 1142, and making the heat conduction balanced, thereby enhancing the heat dissipation effect of the battery cell and improving the heat dissipation performance of the battery.

The fourth area is arranged along the second direction on both sides of the third area, which can evenly guide the heat of the third shell wall to the heat exchanger while avoiding the position of the heat exchanger adhesive layer. Moreover, the heat exchanger adhesive layer is located approximately in the center of the fourth shell wall, which is conducive to stably bonding and fixing the battery cell to the heat exchanger.

In some embodiments, as shown in FIG. 8 to FIG. 10 , the space between the two first extension portions 221 is filled with thermally conductive silica gel, and the thermally conductive silica gel is located between the second shell wall 112 and the heat exchange element 3 .

The thermally conductive silicone may partially or completely fill the space between the two first extension portions 221 , and the thermally conductive silicone may contact the two first extension portions 221 , the heat exchange element 3 , and the second shell wall 112 , respectively, thereby further increasing the thermal conductivity.

Thermally conductive silicone has good thermal conductivity and electrical insulation properties, and has good adhesion to most metal and non-metal materials. Using thermally conductive silicone as a connection structure can fully connect the battery cell and the heat exchanger, so that the heat of the battery cell can be transferred to the heat exchanger to achieve the purpose of heat dissipation.

In some embodiments, as shown in FIG. 10 , the space between the two second extension portions 222 is filled with thermally conductive silica gel, and the thermally conductive silica gel is located between the fourth shell wall 114 and the heat exchange element.

The thermally conductive silicone may partially or completely fill the space between the two second extension portions 222 , and the thermally conductive silicone may contact the two second extension portions 222 , the heat exchange element 3 , and the fourth shell wall 114 , respectively, thereby further increasing the thermal conductivity.

Thermally conductive silicone has good thermal conductivity and electrical insulation properties, and has good adhesion to most metal and non-metal materials. Using thermally conductive silicone as a connection structure can fully connect the battery cell and the heat exchanger, so that the heat of the battery cell can be transferred to the heat exchanger to achieve the purpose of heat dissipation.

In some embodiments, as shown in Figure 11, along the first direction X, the length d1 of the first extension portion 221 located in the second region 1122 is less than or equal to the full length d2 of the second region 1122; and/or, along the first direction X, the length d3 of the second extension portion 222 located in the fourth region 1142 is less than or equal to the full length d4 of the fourth region 1142.

Thus, the contact area between the extension part and the shell wall can be increased as much as possible, the heat dissipation effect of the battery cell can be enhanced, and the battery performance can be improved. In addition, since the first extension part does not exceed the second shell wall and the second extension part does not exceed the fourth shell wall, adjacent battery cells can be arranged as close as possible, which is conducive to improving the volume utilization of the battery.

In some embodiments, as shown in FIG. 11 , the battery 100 further includes a buffer layer 5 , which is disposed between the first battery cell 104 and the second battery cell 105 and is located around the heat conductive member.

The buffer layer may be made of an elastic material, such as foam, so that when the battery cells on both sides of the buffer layer expand and squeeze the heat conducting member 2, the influence of the expansion force of the battery cells can be alleviated.

The embodiment of the present application also provides a thermally conductive and insulating pad 4, which is used to be arranged between the adjacent first heating element and the second heating element. As shown in Figure 5, the thermally conductive and insulating pad 4 is constructed as a stacked body, which includes a first thermally conductive member 25, a thermal insulation layer 24, and a second thermally conductive member 26 in sequence, wherein the first thermally conductive member 25 includes a first main body portion 211 and a first extension portion 221 connected to each other, and the first extension portion 221 extends from the edge of the first main body portion 211; along the width direction perpendicular to the extension direction, the width of the first extension portion 221 is smaller than the width of the first main body portion 211; the second thermally conductive member 26 includes a second main body portion 212 and a second extension portion 222 connected to each other, and the second extension portion 222 extends from the edge of the second main body portion 212; along the width direction perpendicular to the extension direction, the width of the second extension portion 222 is smaller than the width of the second main body portion 212; the thermal insulation layer 24 is stacked with the first main body portion 211 and the second main body portion 212.

The heat-conducting insulation pad 4 includes a three-layer structure stacked in layers. The first heat-conducting member 25 can be used to extract the heat from the first heating element. The first heat-conducting member 25 can be made of high thermal conductivity materials, such as graphene, graphite, carbon nanotubes, silicon carbide (SIC), metal materials, etc., and other high thermal conductivity materials can also be used. The second layer is a heat-insulating layer 24, which can be used to isolate the heat conduction between the heating elements as much as possible. The heat-insulating layer 24 can be made of low thermal conductivity materials such as aerogel or porous vacuum silicon, and other low thermal conductivity materials can also be used. The second heat-conducting member 26 can be used to extract the heat from the second heating element. The second heat-conducting member 26 can be made of high thermal conductivity materials, such as graphene, graphite, carbon nanotubes, silicon carbide (SIC), metal materials, etc., and other high thermal conductivity materials can also be used.

The first heat conducting member 25 , the heat insulating layer 24 , and the second heat conducting member 26 may be bonded together using an adhesive.

Thus, a new structural component is provided, which can both conduct heat from the heating element and block heat conduction between adjacent heating elements.

In some embodiments, as shown in Figures 5 and 6, the number of first extension portions 221 is two, and the two first extension portions 221 are spaced apart from each other along the width direction perpendicular to the extending direction; the number of second extension portions 222 is two, and the two second extension portions 222 are spaced apart from each other along the width direction perpendicular to the extending direction.

The two first extension parts 221 are spaced apart from each other along the width direction perpendicular to the extension direction, and the two second extension parts 222 are spaced apart from each other along the width direction perpendicular to the extension direction. When the heat-conducting insulation pad 4 is connected to the heating element, the protruding part of the heating element (such as the adhesive layer connected to the heat exchanger) can be avoided, and the heat can be evenly and efficiently conducted away.

The second aspect of the present application provides an electrical device, as shown in FIG1 , the electrical device includes the battery 100 provided in the first aspect of the present application, and the battery 100 is used to provide electrical energy to the electrical device.

Since the electrical device adopts the above-mentioned battery 100, the heat dissipation effect of the electrical device can be enhanced, the charging rate can be increased, the charging time can be shortened, the grouping efficiency can be improved, and the production cost can be reduced.

The third aspect of the present application provides an energy storage device 2000. As shown in FIG. 2 , the energy storage device 2000 includes the battery 100 provided in the first aspect of the present application. The battery 100 is used to store electrical energy and can provide electrical energy.

Since the energy storage device 2000 adopts the above-mentioned battery 100, it is possible to enhance the heat dissipation effect of the energy storage device 2000, increase the charging rate, shorten the charging time, improve the grouping efficiency, and reduce the production cost.

A specific embodiment of the present application is described below.

The battery includes a first battery cell 104 and a second battery cell 105 arranged adjacent to each other along a first direction, the first battery cell 104 and the second battery cell 105 are respectively connected to the water cooling plate through thermally conductive silicone, the first battery cell 104 includes a first shell, the first shell includes a first shell wall 111 and a second shell wall 112 adjacent to and connected to the first shell wall 111, wherein the first shell wall 111 is one of the shell walls with the largest outer surface area among the side walls of the first shell, the second shell wall 112 is the bottom wall of the first shell, and the outer surface of the second shell wall 112 includes a first area 1121 for configuring thermally conductive silicone and a second area 1122 located on both sides of the first area 1121 along the second direction , wherein, along the second direction Y, the first region 1121 is substantially in the middle of the second housing wall 112; the second battery cell 105 includes a second housing, the second housing includes a third housing wall 113 and a fourth housing wall 114 adjacent to and connected to the third housing wall 113, wherein the third housing wall 113 is one of the housing walls with the largest outer surface area among the side walls, the fourth housing wall 114 is the bottom wall of the second housing, the outer surface of the fourth housing wall 114 includes a third region 1141 for configuring thermal conductive silica gel and fourth regions 1142 located on both sides of the third region 1141 along the second direction Y, wherein, along the second direction, the third region 1141 is substantially in the middle of the second housing wall 112. wherein the first direction X and the second direction Y are perpendicular to each other and both perpendicular to the third direction Z, the first direction X is perpendicular to the first housing wall 111 and the third housing wall 113, and the third direction Z is perpendicular to the second housing wall 112 and the fourth housing wall 114.

The heat conducting member includes a first heat conducting member 25 and a second heat conducting member 26. The first heat conducting member 25 includes a first main body portion 211 and two first extension portions 221. The first main body portion 211 is mounted on the first housing wall 111, and the two first extension portions 221 are respectively mounted on the two second regions 1122. The second heat conducting member 26 includes a second main body portion 212 and two second extension portions 222. The second main body portion 212 is mounted on the third housing wall 113, and the two second extension portions 222 are respectively mounted on the two fourth regions 1142. Along the first direction, the first extension portion 221 and the second extension portion 222 are arranged to be aligned with each other.

This can avoid the thermal conductive silicone used for bonding the bottom of the battery cell and the water cooling plate, maintain the original bonding position, do not affect the bonding firmness, and at the same time enhance the thermal conductivity of the thermal conductive part.

In a specific embodiment, along the first direction, the first main body part 211 and the second main body part 212 can be stacked between adjacent battery cells, and the extension parts are respectively located at the bottom area of adjacent battery cells, and the extension parts avoid thermal conductive silicone. At this time, the battery cell can be a lithium iron phosphate battery.

In another specific embodiment, along the first direction, the first main body part 211, the insulation layer 24, and the second main body part 212 can be stacked between adjacent battery cells, and the extended parts are respectively located in the bottom area of the adjacent battery cells, and the extended parts avoid the thermal conductive silicone. At this time, the battery cell can be a ternary battery.

In another specific embodiment, along the first direction, there may be only one main body portion between adjacent battery cells, the extension portion is located at the bottom area of one of the battery cells, and the extension portion avoids the thermal conductive silica gel. In this case, the battery cell may be a lithium iron phosphate battery.

In addition, the embodiment of the present application also provides a thermally conductive insulation pad, which includes a three-layer structure stacked, the first layer is a first thermal conductive member 25, the first thermal conductive member 25 is made of high thermal conductivity materials, such as graphene, graphite, carbon nanotubes, silicon carbide (SIC), metal materials, etc. for thermal conductivity of battery cells. The second layer is a thermal insulation layer, and the thermal insulation material is a low thermal conductivity material such as aerogel or porous vacuum silicon, which is used to isolate the heat conduction between battery cells as much as possible. The third layer is a second thermal conductive member 26, and the second thermal conductive member 26 is made of high thermal conductivity materials such as graphene, graphite, carbon nanotubes, silicon carbide (SIC), metal materials, etc. for thermal conductivity of battery cells.

The above is used to illustrate the technical solution of the present application, rather than to limit it; although the present application is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the present application.

Claims (18)

1. A battery is characterized by comprising a heat exchange piece, a heat conduction piece and a plurality of battery monomers,

The plurality of battery cells comprise a first battery cell and a second battery cell which are adjacently arranged along a first direction, the first battery cell and the second battery cell are respectively connected with the heat exchange piece through a heat exchange piece bonding layer,

The first battery unit comprises a first shell, the first shell comprises a first shell wall and a second shell wall which is adjacent to and connected with the first shell wall, and the outer surface of the second shell wall comprises a first area for configuring the heat exchange piece bonding layer and a second area which is located at the side of the first area along a second direction;

The second battery unit comprises a second shell, the second shell comprises a third shell wall and a fourth shell wall which is adjacent to and connected with the third shell wall, and the outer surface of the fourth shell wall comprises a third area for configuring the heat exchange piece bonding layer and a fourth area which is located at the side of the third area along a second direction;

wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to a third direction, the third direction being perpendicular to the second housing wall and the fourth housing wall,

And assembling the heat conducting piece on the outer surface of the first shell wall, the outer surface of the third shell wall, the second area and the fourth area, wherein the parts of the heat conducting piece, which are positioned in the second area and the fourth area, are in contact with the heat exchanging piece.

2. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

The heat conductive member has a main body portion and an extension portion, the main body portion being connected to the extension portion,

Fitting the body portion at the first housing wall and the third housing wall; the extension is assembled in the second region and the fourth region.

3. The battery of claim 2, wherein the battery is configured to provide the battery with a plurality of cells,

The heat conducting member includes a first heat conducting member and a second heat conducting member,

The first heat conduction member includes a first main body portion fitted to the first housing wall and a first extension portion fitted to the second region;

the second heat conductive member includes a second body portion fitted to the third housing wall and a second extension portion fitted to the fourth region.

4. The battery of claim 3, wherein the battery is provided with a battery cell,

Along a first direction, one of the fourth housing wall and the second housing wall is located between the first housing wall and the third housing wall.

5. The battery of claim 3, wherein the battery is provided with a battery cell,

Along the first direction, the first and second body portions are located between the first and third housing walls.

6. The battery of claim 5, wherein the battery is configured to provide the battery with a battery cell,

The thermally conductive member further includes a thermal insulating layer between the first body portion and the second body portion.

7. The battery of claim 6, wherein the battery is configured to provide the battery with a battery cell,

The heat conducting member is a laminated body in which the first body portion, the heat insulating layer, and the second body portion are laminated and integrally connected.

8. The battery according to any one of claim 4 to 7, wherein,

The heat conduction piece comprises at least any one of a graphene layer, a graphite layer, a carbon nano tube layer, a silicon carbide layer and a metal layer.

9. The battery according to claim 6 or 7, wherein,

The heat conduction piece comprises at least any one of a graphene layer, a graphite layer, a carbon nano tube layer, a silicon carbide layer and a metal layer;

the thermal insulation layer comprises an aerogel layer or a porous vacuum silicon layer.

10. The battery according to any one of claim 3 to 7, wherein,

Along the first direction, the first extension portion and the second extension portion are disposed in alignment with each other; or alternatively

Along the first direction, the first extension portion and the second extension portion are disposed offset from each other.

11. The battery according to any one of claim 3 to 7, wherein,

The number of the second areas is two, one second area is arranged on each side of the first area along the second direction,

The number of the first extending parts is two, the two first extending parts are arranged at intervals along the second direction, and one first extending part is assembled in each of the two second areas.

12. The battery of claim 11, wherein the battery is configured to provide the battery with a battery cell,

The number of the fourth areas is two, one fourth area is arranged on each of two sides of the third area along the second direction,

The number of the second extending parts is two, the two second extending parts are arranged at intervals along the second direction, and one second extending part is assembled in each of the two fourth areas.

13. The battery of claim 11, wherein the battery is configured to provide the battery with a battery cell,

And a space between the two first extending parts is filled with heat conducting silica gel, and the heat conducting silica gel is positioned between the second shell wall and the heat exchange piece.

14. The battery of claim 12, wherein the battery is configured to provide the battery with a plurality of cells,

And a space between the two second extending parts is filled with heat conducting silica gel, and the heat conducting silica gel is positioned between the fourth shell wall and the heat exchange piece.

15. The battery according to any one of claim 3 to 7, wherein,

The length of the first extension part located at the second area is smaller than or equal to the whole length of the second area along the first direction; and/or the number of the groups of groups,

The length of the second extension part located at the fourth region is less than or equal to the full length of the fourth region along the first direction.

16. The battery according to any one of claim 1 to 7, wherein,

The battery further includes a buffer layer disposed between the first and second battery cells and around the heat conductive member.

17. An electrical device comprising a battery as claimed in any one of claims 1 to 16 for providing electrical energy to the electrical device.

18. An energy storage device comprising a battery according to any one of claims 1 to 16 for storing electrical energy and capable of providing electrical energy.