Battery and power consumption device

Abstract

Embodiments of the present application provide a battery and a power consumption device. The battery includes a battery cell group and a thermal management device. The battery cell group includes a plurality of battery cells. The thermal management device is used to adjust the temperature of the battery cell group. Here, at least two surfaces of the battery cells are thermally conductively connected to the thermal management device. Embodiments of the present application can increase the heat exchange area of the battery cells, improve the thermal management efficiency of the thermal management device for the battery cells, further meet the cooling requirements for the battery under operating conditions of a larger current or faster charging, and meet the heating requirements for the battery in a lower temperature environment, thereby improving the safety and service life of the battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to batteries and power consumption devices.

[0002] (Cross - reference to related applications) This application claims the priority of Chinese Patent Application CN2022233281190 with the title "Battery and Power Consumption Device" filed on December 13, 2022, and all the contents of this application are incorporated herein by reference.

Background Art

[0003] Energy conservation and reduction of pollutant emissions are the keys to the sustainable development of the automotive industry. Electric vehicles, due to their energy - saving and environmental protection advantages, have become an important part of the sustainable development of the automotive industry. For electric vehicles, battery technology is an important factor related to their development.

[0004] In battery technology, how to improve the safety of batteries is one of the technical problems that urgently need to be solved.

Summary of the Invention

[0005] Embodiments of this application provide a battery and a power consumption device that can effectively improve the energy density and safety of the battery.

[0006] According to a first aspect, this application provides a battery, which includes a battery cell group including a plurality of battery cells, and a thermal management device for regulating the temperature of the battery cell group, where at least two surfaces of the battery cells are thermally conductively connected to the thermal management device.

[0007] In the technical solution of this application, at least two surfaces of the battery cell are thermally conductively connected to a thermal management device, which can increase the heat exchange area of the battery cell, improve the thermal management efficiency of the thermal management device for the battery cell, and further meet the cooling requirement for the battery in the operating situation of a larger current or a faster charging, and can meet the heating requirement for the battery in a lower temperature environment, thereby improving the safety and service life of the battery.

[0008] According to some embodiments of this application, the thermal management device includes a plurality of first thermal management members, and the plurality of first thermal management members are installed at intervals along a first direction, and at least one of the battery cells is installed between two adjacent first thermal management members. The battery cell has two first surfaces installed opposite to each other along the first direction, and the two first surfaces of the battery cell are respectively thermally conductively connected to two of the first thermal management members.

[0009] In the above technical solution, at least one battery cell is sandwiched between two adjacent first thermal management members, and the two adjacent first thermal management members can perform a position restricting and supporting function on the battery cell, reducing the possibility of deformation caused by the mutual pressing of a plurality of battery cells, and the first thermal management member can further perform an anti-expansion function on the battery cell, which is beneficial to improving the structural stability of the battery. The two first surfaces of the battery cell are respectively thermally conductively connected to two of the first thermal management members, and the battery cell can realize heat exchange through the two first surfaces, and the distribution of the heat exchange area is more uniform, which is beneficial to further improving the performance stability of the battery.

[0010] According to some embodiments of this application, a first heat exchange chamber for accommodating a heat exchange medium is formed in the first thermal management member, and the first heat exchange chambers of the plurality of first thermal management members communicate with each other.

[0011] In the above technical solution, a first heat exchange chamber for accommodating a heat exchange medium is formed in the first heat management member, and the first heat exchange chambers of a plurality of the first heat management members communicate with each other, so that the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device. At the same time, compared with the isolated heat exchange chamber structure, the plurality of first heat exchange chambers communicate with each other, reducing the number of liquid inlet and outlet structures, further reducing the occupied space of the liquid inlet and outlet structures, which is beneficial to further improving the energy density of the battery.

[0012] According to some embodiments of the present application, a plurality of the battery cells arranged along a second direction are installed between two adjacent first heat management members, and the second direction is perpendicular to the first direction.

[0013] In the above technical solution, compared with the structure in which a battery cell is sandwiched between two adjacent first heat management members installed alone, the plurality of battery cells arranged along the second direction share two first heat management members, simplify the structure and production and installation process of the heat management device, reduce the number of the first heat management members, thereby reducing the additional structure (such as the mounting and fixing structure) of the first heat management member, saving the production cost of the battery, and at the same time reducing the space occupied by the additional structure of the first heat management member, which is beneficial to improving the energy density of the battery.

[0014] According to some embodiments of the present application, the heat management device further includes a plurality of second heat management members, the plurality of second heat management members are installed at intervals along the second direction, and at least one of the battery cells is installed between two adjacent second heat management members. The battery cell has two second surfaces installed opposite to each other along the second direction, and the two second surfaces of the battery cell are respectively connected to the two second heat management members in a heat-conductive manner.

[0015] In the above technical solution, at least one battery cell is clamped between two adjacent second heat management members, and the two adjacent second heat management members can perform a position restricting and supporting function on the battery cell, reducing the possibility of deformation caused by the plurality of battery cells pressing against each other. Moreover, the second heat management member can further perform an anti-expansion function on the battery cell, which is advantageous for improving the structural stability of the battery. Two second surfaces of the battery cell are respectively thermally conductively connected to two second heat management members, and the battery cell can achieve heat exchange through the two second surfaces, further making the distribution of the heat exchange area of the battery cell more uniform and further improving the performance stability of the battery.

[0016] According to some embodiments of the present application, a first heat exchange chamber for accommodating a heat exchange medium is formed in the first heat management member, a second heat exchange chamber for accommodating a heat exchange medium is formed in the second heat management member, and the second heat exchange chamber communicates with the first heat exchange chamber.

[0017] In the above technical solution, a second heat exchange chamber for accommodating a heat exchange medium is formed in the second heat management member, and by communicating the second heat exchange chamber with the first heat exchange chamber, the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device. At the same time, compared with an isolated heat exchange chamber structure, a plurality of second heat exchange chambers communicate with a plurality of first heat exchange chambers, reducing the number of liquid inlet and outlet structures, further reducing the occupied space of the liquid inlet and outlet structures, which is advantageous for further improving the energy density of the battery.

[0018] According to some embodiments of the present application, the heat management device further includes a third heat management member, and the third heat management member is installed on one side along a third direction of the battery cell group, and the third direction is perpendicular to the first direction. The battery cell has a third surface, and the third surface of the battery cell is thermally conductively connected to the third heat management member.

[0019] In the above technical solution, the third surface of the battery cell is thermally conductively connected to the third heat management member, and the battery cell can achieve heat exchange through the third surface, further making the distribution of the heat exchange area of the battery cell more uniform, which is beneficial to further improve the performance stability of the battery.

[0020] According to some embodiments of the present application, a first heat exchange chamber for accommodating a heat exchange medium is formed in the first heat management member, a third heat exchange chamber for accommodating a heat exchange medium is formed in the third heat management member, and the third heat exchange chamber communicates with the first heat exchange chamber.

[0021] In the above technical solution, a third heat exchange chamber for accommodating a heat exchange medium is formed in the third heat management member, and the third heat exchange chamber communicates with the first heat exchange chamber, so that the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device. At the same time, compared with the isolated heat exchange chamber structure, a plurality of third heat exchange chambers communicate with a plurality of first heat exchange chambers, reducing the number of liquid inlet and outlet structures, further reducing the occupied space of the liquid inlet and outlet structures, which is beneficial to further improve the energy density of the battery.

[0022] According to some embodiments of the present application, the battery cell further has a fourth surface, the fourth surface and the third surface are oppositely arranged along the third direction, and the electrode terminal of the battery cell is installed on the fourth surface.

[0023] In the above technical solution, the first surface, the second surface and the third surface of the battery cell where the electrode terminal is not installed are thermally conductively connected to the heat management device to achieve heat exchange, and the influence of the electrode terminal on the heat exchange between the battery cell and the heat management device can be reduced.

[0024] According to some embodiments of the present application, the battery cell further has a fourth surface, the electrode terminal of the battery cell is installed on the fourth surface, the thermal management device further includes a fourth thermal management member, the fourth thermal management member is installed on one side along the third direction of the battery cell group, the fourth surface of the battery cell is thermally conductively connected to the fourth thermal management member, and the third direction is perpendicular to the first direction.

[0025] In the above technical solution, the fourth surface of the battery cell is thermally conductively connected to the fourth thermal management member, whereby the battery cell can achieve heat exchange through the fourth surface, and further make the distribution of the heat exchange area of the battery cell more uniform, which is beneficial to further improve the performance stability of the battery. Moreover, the fourth thermal management member can further cooperate with the third thermal management member to realize the position restricting effect on the battery cell, and can play the role of preventing expansion of the battery cell, which is beneficial to improving the structural stability of the battery.

[0026] According to some embodiments of the present application, when observing along the third direction, the fourth thermal management member does not overlap with the electrode terminal of the battery cell.

[0027] In the above technical solution, when observing along the third direction, by making the fourth thermal management member not overlap with the electrode terminal of the battery cell, the fourth thermal management member can reduce the influence on the connection between the electrode terminal and other members.

[0028] According to some embodiments of the present application, a pressure relief mechanism is installed on the fourth surface of the battery cell, and when observing along the third direction, the fourth thermal management member and the pressure relief mechanism do not overlap.

[0029] In the above technical solution, when observing along the third direction, by making the fourth thermal management member not overlap with the pressure relief mechanism, the influence of the fourth thermal management member on the pressure relief of the pressure relief mechanism can be reduced, and further the influence on the safety of the battery can be reduced.

[0030] According to some embodiments of the present application, a plurality of the fourth heat management members are provided. The fourth heat management members extend along the first direction, and the plurality of the fourth heat management members are spaced along the second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0031] In the above technical solution, by providing a plurality of fourth heat management members, the heat exchange area of the fourth heat management members with respect to the battery cells can be made larger, and the heat exchange efficiency can be higher.

[0032] According to some embodiments of the present application, the heat management device further includes a current collecting member. The current collecting member is connected to a plurality of the fourth heat management members. A fourth heat exchange chamber for accommodating a heat exchange medium is formed in the fourth heat management member, and a current collecting cavity for accommodating a heat exchange medium is formed in the current collecting member. The fourth heat exchange chamber communicates with the current collecting cavity.

[0033] In the above technical solution, by connecting a plurality of fourth heat management members via a current collecting member, the structure of the plurality of fourth heat management members can be made stronger, and the strength of the overall structure of the battery can be made higher. By communicating the fourth heat exchange chambers of the plurality of fourth heat management members with the current collecting cavity of the current collecting member, the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device. At the same time, compared with an isolated heat exchange chamber structure, the plurality of fourth heat exchange chambers communicate with the current collecting cavity, reducing the number of liquid inlet and outlet structures and further reducing the occupied space of the liquid inlet and outlet structures, which is advantageous for further improving the energy density of the battery.

[0034] According to some embodiments of the present application, two current collecting members are provided. The two current collecting members are spaced along the first direction, and both ends of the fourth heat management member are respectively connected to the two current collecting members.

[0035] In the above technical solution, by installing two current collecting members, both ends of the fourth heat management member can be connected to the two current collecting members respectively, further improving the fluidity of the heat exchange medium in the heat exchange chamber, thereby further improving the heat exchange efficiency of the heat management device.

[0036] According to some embodiments of the present application, a first heat exchange chamber for accommodating a heat exchange medium is formed in the first heat management member, and a fourth heat exchange chamber for accommodating a heat exchange medium is formed in the fourth heat management member. The fourth heat exchange chamber communicates with the first heat exchange chamber.

[0037] In the above technical solution, by forming a fourth heat exchange chamber for accommodating a heat exchange medium in the fourth heat management member and making the fourth heat exchange chamber communicate with the first heat exchange chamber, the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device. At the same time, compared with the isolated heat exchange chamber structure, a plurality of fourth heat exchange chambers communicate with a plurality of first heat exchange chambers, reducing the number of liquid inlet and outlet structures and further reducing the occupied space of the liquid inlet and outlet structures, which is beneficial to further improving the energy density of the battery.

[0038] According to some embodiments of the present application, the heat management device includes a first heat management member and a second heat management member. The battery cell has two first surfaces oppositely installed along a first direction and two second surfaces oppositely installed along a second direction. At least one of the first surfaces of the battery cell is thermally conductively connected to the first heat management member, and at least one of the second surfaces of the battery cell is thermally conductively connected to the second heat management member. The first direction is perpendicular to the second direction.

[0039] In the above technical solution, at least one first surface and at least one second surface of the battery cell are thermally conductively connected to the thermal management device, whereby the battery cell can achieve heat exchange through two perpendicular surfaces, further achieving heat exchange in multiple directions, which is advantageous for improving the reliability of the heat exchange of the battery cell.

[0040] According to some embodiments of the present application, a plurality of the first heat management members are provided, and the plurality of the first heat management members are installed at intervals along the first direction, and at least one of the battery cells is installed between two adjacent ones of the first heat management members, and two of the first surfaces of the battery cell are respectively thermally conductively connected to two of the first heat management members.

[0041] In the above technical solution, compared with the structure in which a battery cell is sandwiched between two adjacent first heat management members installed alone, a plurality of battery cells arranged along the second direction share two first heat management members, simplify the structure of the thermal management device and the production and installation process, reduce the number of the first heat management members, thereby reducing the additional structure (such as the mounting and fixing structure) of the first heat management members, saving the production cost of the battery, and at the same time reducing the space occupied by the additional structure of the first heat management members, which is advantageous for improving the energy density of the battery.

[0042] According to some embodiments of the present application, a plurality of the second heat management members are provided, and the plurality of the second heat management members are installed at intervals along the second direction, and at least one of the battery cells is installed between two adjacent ones of the second heat management members, and two of the second surfaces of the battery cell are respectively thermally conductively connected to two of the second heat management members.

[0043] In the above technical solution, two second surfaces of the battery cell are respectively thermally conductively connected to two second heat management members, and the battery cell can achieve heat exchange through the two second surfaces, further making the distribution of the heat exchange area of the battery cell more uniform, which is advantageous for further improving the performance stability of the battery.

[0044] According to some embodiments of the present application, the first surface is the surface with the largest area in the battery cell.

[0045] In the above technical solution, by thermally connecting the first surface with the largest area of the battery cell to the first heat management member, the heat exchange area of the battery cell can be further improved, thereby making the heat management efficiency of the heat management device for the battery cell higher.

[0046] According to a second aspect, the present application provides a power consumption device, which includes the battery described in any one of the above solutions, and the battery is used to provide electrical energy.

Brief Description of the Drawings

[0047] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the description of the embodiments of the present application. It should be understood that the following drawings are only some embodiments of the present application and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained based on these drawings without creative efforts.

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Best Mode for Carrying Out the Invention

[0048] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the following will clearly describe the technical solutions in the embodiments of this application while combining the drawings in the embodiments of this application. Obviously, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained on the premise that those skilled in the art do not pay creative labor shall fall within the protection scope of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. In this application, the terms used in the description of the application are only for describing specific embodiments and are not intended to limit this application. The terms "comprising" and "having" and any variations thereof in the description of the specification, claims and the above drawings of this application are intended to cover non-exclusive "comprising". The terms "first", "second", etc. in the description of the specification, claims or the above drawings of this application are not for describing a specific order or a primary-secondary relationship, but for distinguishing different objects.

[0050] The "embodiments" referred to in this application mean that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The appearance of this phrase at each position 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.

[0051] In the description of this application, unless otherwise specifically defined or limited, terms such as "attachment", "connection", "linkage", and "installation" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium; it may also be a communication within two elements. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific situation.

[0052] The term "and / or" in this application only describes the relationship of the relevant objects and indicates that three relationships can exist. For example, A and / or B may represent three cases: A alone, the combination of A and B, and B alone. Also, the character " / " in this application generally represents that the relevant objects before and after are in an "or" relationship.

[0053] In the embodiments of this application, the description of the same reference numerals represents the same member. And for the sake of brevity, in different embodiments, the detailed description of the same member is omitted. It should be understood that the dimensions such as the thickness and aspect of various members in the embodiments of this application shown in the drawings, as well as the dimensions such as the thickness and aspect of the entire integrated device, are only exemplary descriptions and do not constitute any limitation to this application.

[0054] The "plurality" that appears in this application refers to two or more (including two).

[0055] In this application, the battery cell may include, for example, a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, etc., and the embodiments of this application are not limited thereto. The battery cell may have a flat body, a cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto either.

[0056] The battery mentioned in the embodiments of this application includes a plurality of battery cells and is a single physical module that provides a higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc. The battery may generally further include a housing for packaging one or more battery cells or a plurality of battery modules. The housing can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cells.

[0057] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode plate, a negative electrode plate, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode plate and the negative electrode plate. The electrode assembly may have a wound structure or a stacked structure, and the embodiments of this application are not limited thereto.

[0058] The battery has prominent advantages such as high energy density, low environmental pollution, high power density, long service life, wide application range, and low self-discharge coefficient, and is currently an important component of the new energy development. With the development of the new energy industry, the battery is gradually developing in the direction of large-scale and integration.

[0059] However, stacking a large number of battery cells makes the temperature control inside the battery very important. If the temperature is too high, the battery may experience thermal runaway, leading to a decrease in the power supply efficiency of the battery, and further causing failure, and even causing deformation of the battery, which may affect the safety and service life of the battery. If the temperature is too low, it will cause a rapid change in the internal resistance of the battery, leading to a decrease in the power supply efficiency of the battery, and further causing failure, which will affect the reliability and service life of the battery. The non-uniform temperature distribution will continuously expand the difference between battery cells and accelerate the failure of the battery, which will affect the reliability and service life of the battery.

[0060] In some technologies, in order to reduce the impact of temperature on the battery, a thermal management member is installed at the bottom of the battery cell to achieve heat exchange with the battery cell, thereby alleviating the problems that the temperature of the battery cell is too high, the temperature is too low, and the temperature distribution among the battery cells is uneven.

[0061] However, the inventor has discovered that the battery occupied space of such a structure is large and the heat exchange effect is low, and it cannot meet the requirements for the safety of the market batteries.

[0062] Based on the above considerations, in order to effectively improve the safety of the battery, the inventor designs a battery, which includes a battery cell group and a thermal management device. The battery cell group includes a plurality of battery cells. At least two surfaces of the battery cells are thermally conductively connected to the thermal management device, and the thermal management device is used to adjust the temperature of the battery cell group.

[0063] In the technical solution of this application, at least two surfaces of the battery cells are thermally conductively connected to the thermal management device, which can increase the heat exchange area of the battery cells, make the thermal management efficiency of the thermal management device for the battery cells higher, and further meet the cooling requirements for the battery in the operating conditions of a larger current or a faster charging, and can meet the heating requirements for the battery in a lower temperature environment, thereby improving the safety and service life of the battery.

[0064] The battery disclosed in the embodiment of this application can be used in power-consuming devices such as vehicles, ships or aircraft, but is not limited thereto. The power supply system of this power-consuming device can be configured using the battery disclosed in this application.

[0065] Embodiments of the present application provide a power-consuming device that uses a battery as a power source. The power-consuming device may be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery vehicle, an electric vehicle, a steamship, a spacecraft, etc. Here, the electric toy may include a stationary or mobile electric toy, for example, a game console, an electric vehicle toy, an electric steamship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, an aerospace plane, a spaceship, etc.

[0066] The battery described in the embodiments of the present application can be applied not only to the power-consuming devices described above, but also to all power-consuming devices that use batteries. For the sake of brevity, the following embodiments will be described by taking the power-consuming device as a vehicle as an example.

[0067] Referring to FIG. 1, FIG. 1 is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a gasoline vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a range extender vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to supply power to the vehicle 1000. For example, the battery 100 may be used as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, for starting the vehicle 1000, navigation, and power consumption requirements during driving.

[0068] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000 to provide driving power to the vehicle 1000 instead of or partially instead of fuel oil or natural gas.

[0069] Referring to FIG. 2, FIG. 2 is a schematic diagram of the three-dimensional structure of a battery according to some embodiments of the present application. Some embodiments of the present application provide a battery 100, which includes a battery cell group 10 and a thermal management device 20. The battery cell group 10 includes a plurality of battery cells 11, and the thermal management device 20 is used to adjust the temperature of the battery cell group 10. Here, at least two surfaces of the battery cell 11 are thermally conductively connected to the thermal management device 20.

[0070] In some embodiments, the battery cell 11 may have a flat body, a cuboid or other shapes.

[0071] In some embodiments, in the battery cell group 10, the plurality of battery cells 11 may be connected in series, in parallel or in series-parallel. The series-parallel connection means that there are not only series connections but also parallel connections among the plurality of battery cells 11. The plurality of battery cells 11 may be connected in series, in parallel or in series-parallel. Of course, the battery cell group 10 may be in a form in which the plurality of battery cells 11 are first connected in series, in parallel or in series-parallel to form a battery cell group module. The plurality of battery cell group modules may be further connected in series, in parallel or in series-parallel to be integrally formed. This battery 100 may further include a bus bar member for realizing the electrical connection among the plurality of battery cells 11.

[0072] By thermally conductively connecting at least two surfaces of the battery cell 11 to the thermal management device 20, the heat exchange area of the battery cell 11 can be increased, the thermal management efficiency of the thermal management device 20 for the battery cell 11 can be made higher, and the cooling requirement for the battery 100 in a situation of a larger current or a faster charging operation can be satisfied, and the heating requirement for the battery 100 in a lower temperature environment can be satisfied. Thereby, the safety and service life of the battery 100 can be improved.

[0073] In some embodiments, the thermal management device 20 may include a plurality of first thermal management members 21. The plurality of first thermal management members 21 are installed at intervals along the first direction X, and at least one battery cell 11 is installed between two adjacent first thermal management members 21.

[0074] At least one battery cell 11 is sandwiched between two adjacent first thermal management members 21. The two adjacent first thermal management members 21 can perform a position restricting and supporting function on the battery cell 11, reducing the possibility of deformation caused by the plurality of battery cells 11 pressing against each other. Moreover, the first thermal management member 21 can further perform an anti-expansion function on the battery cell 11, which is advantageous for improving the structural stability of the battery 100.

[0075] Referring also to FIG. 3, FIG. 3 is a schematic structural view of a battery cell according to some embodiments of the present application. In some embodiments, the battery cell 11 has two first surfaces 111 installed opposite to each other along the first direction X, and the two first surfaces 111 of the battery cell 11 are respectively connected to two first thermal management members 21 in a thermally conductive manner.

[0076] The two first surfaces 111 of the battery cell 11 are respectively connected to two first thermal management members 21 in a thermally conductive manner. The battery cell 11 can achieve heat exchange through the two first surfaces 111, and the distribution of the heat exchange area is more uniform, which is advantageous for further improving the performance stability of the battery 100.

[0077] In other embodiments, a plurality of battery cells 11 may be installed between two adjacent first thermal management members 21. That is, only one first surface 111 of the battery cell 11 may be connected to the first thermal management member 21 in a thermally conductive manner, or the first surface 111 of the battery cell 11 may not be connected to the first thermal management member 21 in a thermally conductive manner. The arrangement of the battery cells 11 can be made more dense, and further the energy density of the battery 100 can be improved.

[0078] Here, a heat insulation layer may be installed between two adjacent battery cells 11 that are not separated by the first heat management member 21. The heat insulation layer may be made of a material with a low thermal conductivity, such as silica gel, foamed plastic, mica, ceramic, etc. By installing the heat insulation layer, the heat insulation effect between two adjacent battery cells 11 can be achieved, and furthermore, the position regulation and support effects on the battery cell 11 can be achieved. When thermal runaway occurs in a single battery cell 11, the heat insulation layer can effectively reduce the risk that the heat of the thermally runaway battery cell 11 is transmitted to the adjacent battery cell 11, thereby effectively reducing the heat diffusion risk of the battery 100 and improving the reliability of the battery 100.

[0079] In some embodiments, a first heat exchange chamber (not shown) for accommodating a heat exchange medium is formed in the first heat management member 21, and the first heat exchange chambers of the plurality of first heat management members 21 communicate with each other.

[0080] The first heat exchange chamber is used to accommodate a heat exchange medium, and the heat exchange medium may be a liquid or a gas. When used to cool or lower the temperature of the battery cell 11, the first heat management member 21 is used to accommodate a cooling medium to lower the temperature of the battery cell 11. At this time, the first heat management member 21 may be called a cooling member, a cooling system, a cooling plate, etc., and the heat exchange medium it accommodates may be called a cooling medium, and more specifically, it may be called a coolant or a cooling gas. Also, the first heat management member 21 may be used to heat the battery cell 11, and the embodiments of the present application do not limit this. Exemplarily, the first heat management member 21 accommodates a coolant to lower the temperature of the battery cell 11.

[0081] In the first heat management member 21, a first heat exchange chamber is formed such that the first heat exchange chambers of the plurality of first heat management members communicate with each other. By the communication of the first heat exchange chambers of the plurality of first heat management members 21 with each other, the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device 20. At the same time, compared with the isolated heat exchange chamber structure, the plurality of first heat exchange chambers communicate with each other, reducing the number of liquid inlet and outlet structures, and further reducing the occupied space of the liquid inlet and outlet structures, which is advantageous for further improving the energy density of the battery.

[0082] In some embodiments, a plurality of battery cells 11 arranged along the second direction Y are installed between two adjacent first heat management members 21, and the second direction Y is perpendicular to the first direction X.

[0083] Compared with the structure in which the battery cell 11 is sandwiched between two adjacent first heat management members 21 installed separately, the plurality of battery cells 11 arranged along the second direction Y share the two first heat management members 21, simplify the structure and production and installation process of the heat management device 20, reduce the number of the first heat management members 21, thereby reducing the additional structure (such as the mounting and fixing structure) of the first heat management member 21, saving the production cost of the battery 100, and at the same time reducing the space occupied by the additional structure of the first heat management member 21, which is advantageous for improving the energy density of the battery 100.

[0084] Referring to FIGS. 4 and 5, FIG. 4 is a schematic diagram of the three-dimensional structure of a battery according to some embodiments of the present application, and FIG. 5 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application. In some embodiments, the heat management device 20 further includes a plurality of second heat management members 22, the plurality of second heat management members 22 are installed at intervals along the second direction Y, and at least one battery cell 11 is installed between two adjacent second heat management members 22.

[0085] At least one battery cell 11 is sandwiched between two adjacent second heat management members 22. The two adjacent second heat management members 22 can perform a position restricting and supporting function on the battery cell 11, reducing the possibility of deformation caused by the plurality of battery cells 11 pressing against each other. Moreover, the second heat management member 22 can further perform an anti-expansion function on the battery cell 11, which is advantageous for improving the structural stability of the battery 100.

[0086] In some embodiments, the battery cell 11 has two second surfaces 112 disposed opposite to each other along the second direction Y. The two second surfaces 112 of the battery cell 11 are each thermally conductively connected to two second heat management members 22.

[0087] The two second surfaces 112 of the battery cell 11 are each thermally conductively connected to two second heat management members 22. The battery cell 11 can achieve heat exchange through the two second surfaces 112, further making the distribution of the heat exchange area of the battery cell 11 more uniform and being advantageous for further improving the performance stability of the battery 100.

[0088] In other embodiments, a plurality of battery cells 11 may be disposed between two adjacent second heat management members 22. That is, only one second surface 112 of the battery cell 11 may be thermally conductively connected to the second heat management member 22, or the second surface 112 of the battery cell 11 may not be thermally conductively connected to the second heat management member 22. The arrangement of the battery cells 11 can be made more dense, and further the energy density of the battery 100 can be improved.

[0089] Here, a heat insulation layer may be installed between two adjacent battery cells 11 that are not separated by the second heat management member 22. The heat insulation layer may be made of a material with low thermal conductivity, such as silica gel, foamed plastic, mica, ceramic, etc. By installing the heat insulation layer, the heat insulation effect between two adjacent battery cells 11 can be achieved, and furthermore, the position regulation and support functions for the battery cells 11 can be achieved. When thermal runaway occurs in a single battery cell 11, the heat insulation layer can effectively reduce the risk of the heat of the thermally runaway battery cell 11 being transmitted to the adjacent battery cells 11, thereby effectively reducing the heat diffusion risk of the battery 100 and improving the reliability of the battery 100.

[0090] In some embodiments, a second heat exchange chamber (not shown) for accommodating a heat exchange medium is formed in the second heat management member 22, and the second heat exchange chamber communicates with the first heat exchange chamber.

[0091] By forming a second heat exchange chamber for accommodating a heat exchange medium in the second heat management member 22 and communicating the second heat exchange chamber with the first heat exchange chamber, the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device 20. At the same time, compared with the isolated heat exchange chamber structure, a plurality of second heat exchange chambers communicate with a plurality of first heat exchange chambers, reducing the number of liquid inlet and outlet structures, further reducing the occupied space of the liquid inlet and outlet structures, which is advantageous for further improving the energy density of the battery.

[0092] Referring to FIG. 6, FIG. 6 is a schematic diagram of the three-dimensional structure of a battery according to some embodiments of the present application. In some embodiments, the heat management device 20 may further include a third heat management member 23, and the third heat management member 23 is installed on one side along the third direction Z of the battery cell group 10. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0093] Here, the third heat management member 23 may correspond to all the battery cells 11 of the battery cell group 10 and may also play a supporting role for the battery cells 11.

[0094] In other embodiments, the number of the third heat management members 23 may be plural, and each third heat management member 23 may correspond to one or more battery cells 11, which is not limited here.

[0095] In some embodiments, the battery cell 11 has a third surface 113, and the third surface 113 of the battery cell 11 is thermally conductively connected to the third heat management member 23.

[0096] The third surface 113 of the battery cell 11 is thermally conductively connected to the third heat management member 23, whereby the battery cell 11 can achieve heat exchange through the third surface 113, and further make the distribution of the heat exchange area of the battery cell 11 more uniform, which is advantageous for further improving the performance stability of the battery 100.

[0097] In some embodiments, a third heat exchange chamber (not shown) for accommodating a heat exchange medium is formed in the third heat management member 23, and the third heat exchange chamber communicates with the first heat exchange chamber.

[0098] The third heat exchange chamber is formed in the third heat management member 23 such that the third heat exchange chamber communicates with the first heat exchange chamber, and the communication between the third heat exchange chamber and the first heat exchange chamber can effectively improve the fluidity of the heat exchange medium in the heat exchange chamber, thereby further improving the heat exchange efficiency of the heat management device 20. At the same time, compared with the isolated heat exchange chamber structure, the plurality of third heat exchange chambers communicate with the plurality of first heat exchange chambers, reducing the number of liquid inlet and outlet structures, further reducing the occupied space of the liquid inlet and outlet structures, which is advantageous for further improving the energy density of the battery.

[0099] In some embodiments, the battery cell 11 further has a fourth surface 114, the fourth surface 114 is disposed opposite to the third surface 113 along the third direction Z, and the electrode terminal 115 of the battery cell 11 is disposed on the fourth surface 114.

[0100] The electrode terminal 115 is used to output or input the electrical energy of the battery cell 11. The two electrode terminals 115 are a positive electrode terminal and a negative electrode terminal respectively. The positive electrode terminal and the negative electrode terminal may be spaced apart on the fourth surface 114 of the battery cell 11, which helps to facilitate the interconnection operation of the electrode terminals 115 of the plurality of battery cells 11, simplifies the manufacturing process of the battery 100, and reduces the manufacturing difficulty of the battery 100. Moreover, the electrode terminal 115 is disposed on the fourth surface 114 of the battery cell 11, and can effectively reduce the occupation of the electrode terminal 115 on the accommodation space surrounded by the first heat management member 21, the second heat management member 22 and the third heat management member 23. The accommodation space may be used only for accommodating the main body portion of the battery cell 11, which is advantageous for improving the energy density of the battery 100.

[0101] By thermally conducting and connecting the first surface 111, the second surface 112 and the third surface 113 of the battery cell 11 where the electrode terminal 115 is not disposed to the heat management device 20 to realize heat exchange, the influence of the electrode terminal 115 on the heat exchange between the battery cell 11 and the heat management device 20 can be reduced.

[0102] Referring to FIG. 7, FIG. 7 is a schematic diagram of the three-dimensional structure of a battery according to some embodiments of the present application. In some embodiments, the heat management device 20 may further include a plurality of fourth heat management members 24. The fourth heat management member 24 is disposed on one side of the battery cell group 10 along the third direction Z, and the fourth surface 114 of the battery cell 11 is thermally conductively connected to the fourth heat management member 24.

[0103] The fourth surface 114 of the battery cell 11 is thermally conductively connected to the fourth heat management member 24, whereby the battery cell 11 can achieve heat exchange through the fourth surface 114, further making the distribution of the heat exchange area of the battery cell 11 more uniform, which is advantageous for further improving the performance stability of the battery 100. Moreover, the fourth heat management member 24 can further cooperate with the third heat management member 23 to achieve a position restricting effect on the battery cell 11, can play an anti-expansion role on the battery cell 11, and is advantageous for improving the structural stability of the battery 100.

[0104] In some embodiments, when observed along the third direction Z, the fourth heat management member 24 does not overlap with the electrode terminal 115 of the battery cell 11.

[0105] By making the fourth heat management member 24 not overlap with the electrode terminal 115 of the battery cell 11 when observed along the third direction Z, the fourth heat management member 24 can reduce the influence on the connection between the electrode terminal 115 and other members.

[0106] In some embodiments, a pressure relief mechanism (not shown) is installed on the fourth surface 114 of the battery cell 11. When observed along the third direction Z, the fourth heat management member 24 does not overlap with the pressure relief mechanism.

[0107] By installing a pressure relief mechanism on the battery cell 11, when the pressure inside the battery cell 11 is excessive, the pressure relief mechanism can be turned on, and further the pressure inside and outside the battery cell 11 can be balanced. By making the fourth heat management member 24 not overlap with the pressure relief mechanism when observed along the third direction Z, the influence of the fourth heat management member 24 on the pressure relief of the pressure relief mechanism can be reduced, and further the influence on the safety of the battery 100 can be reduced.

[0108] In some embodiments, a plurality of fourth heat management members 24 are installed. The fourth heat management members 24 extend along the first direction, and the plurality of fourth heat management members 24 are installed at intervals along the second direction.

[0109] By installing a plurality of fourth heat management members 24, the heat exchange area of the fourth heat management member 24 with respect to the battery cells 11 can be made larger, and the heat exchange efficiency can be higher.

[0110] In some embodiments, the fourth heat management member 24 may include a first sub-heat management member 241 and a second sub-heat management member 242. Here, the projection of the first sub-heat management member 241 along the third direction Z is respectively within the projections of two adjacent battery cells 11 along the third direction Z along the second direction Y. The projection of the second sub-heat management member 242 along the third direction Z is within the projections of the two electrode terminals 115 along the third direction Z.

[0111] By making the projection of the first sub-heat management member 241 along the third direction Z respectively within the projections of two adjacent battery cells 11 along the third direction Z along the second direction Y, both of the two adjacent battery cells 11 can exchange heat with the first sub-heat management member 241, and further improve the heat exchange efficiency of the heat management device 20.

[0112] By making the projection of the second sub-heat management member 242 along the third direction Z within the projections of the two electrode terminals 115 along the third direction Z, the battery cell 11 can sufficiently exchange heat with the second sub-heat management member 242, and further improve the heat exchange efficiency of the heat management device 20.

[0113] In some embodiments, the numbers of the first sub-heat management member 241 and the second sub-heat management member 242 may both be plural, and the plurality of first sub-heat management members 241 and the plurality of second sub-heat management members 242 may be installed at intervals alternately.

[0114] In some embodiments, the heat management device 20 may further include a current collecting member 26 respectively connected to the plurality of fourth heat management members 24.

[0115] By connecting a plurality of fourth heat management members 24 via the current collector member 26, the structure of the plurality of fourth heat management members 24 can be made stronger, and the strength of the overall structure of the battery 100 can be increased.

[0116] In some embodiments, a fourth heat exchange chamber (not shown) for accommodating a heat exchange medium is formed in the fourth heat management member 24, and a current collection cavity (not shown) for accommodating a heat exchange medium is formed in the current collector member 26, and the fourth heat exchange chamber communicates with the current collection cavity.

[0117] By communicating the fourth heat exchange chambers of the plurality of fourth heat management members 24 with the current collection cavity of the current collector member 26, the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device 20. At the same time, compared with the isolated heat exchange chamber structure, the plurality of fourth heat exchange chambers communicate with the current collection cavity, reducing the number of liquid inlet and outlet structures and further reducing the occupied space of the liquid inlet and outlet structures, which is advantageous for further improving the energy density of the battery.

[0118] In some embodiments, the extending direction of the current collector member 26 is perpendicular to the extending direction of the fourth heat management member 24, so that the current collector member 26 can be connected to the ends of the plurality of fourth heat management members 24.

[0119] In some embodiments, two current collector members 26 are provided, and the two current collector members 26 are installed at intervals along the first direction X, and both ends of the fourth heat management member 24 are respectively connected to the two current collector members 26.

[0120] By providing two current collector members 26, both ends of the fourth heat management member 24 can be respectively connected to the two current collector members 26, further improving the fluidity of the heat exchange medium in the heat exchange chamber, thereby further improving the heat exchange efficiency of the heat management device 20.

[0121] In some embodiments, the fourth heat exchange chamber of the fourth heat management member 24 communicates with the first heat exchange chamber of the first heat management member 21.

[0122] By communicating the fourth heat exchange chamber of the fourth heat management member 24 with the first heat exchange chamber of the first heat management member 21, the fluidity of the heat exchange medium in the heat exchange chamber can be effectively improved, thereby further improving the heat exchange efficiency of the heat management device 20. At the same time, compared with the isolated heat exchange chamber structure, the plurality of fourth heat exchange chambers communicate with the plurality of first heat exchange chambers, reducing the number of liquid inlet and outlet structures, further reducing the occupied space of the liquid inlet and outlet structures, and being advantageous for further improving the energy density of the battery.

[0123] In some embodiments, the first heat management member 21, the second heat management member 22, the third heat management member 23, and the fourth heat management member 24 may have a plate-like structure, and the thickness direction thereof is perpendicular to the surface of the battery cell 11 that is thermally conductively connected thereto, which can effectively improve the effective working area of the heat management member and is more likely to further improve the heat exchange effect of the heat management member on the battery cell 11.

[0124] In other embodiments, the first heat management member 21, the second heat management member 22, the third heat management member 23, and the fourth heat management member 24 may have a structure having a cavity capable of accommodating a heat exchange medium of any shape such as a tubular shape, and the shape can be adaptively adjusted according to the requirements of the outer shape structure of the battery 100, the shape of the battery cell 11, and the like.

[0125] The first heat management member 21, the second heat management member 22, the third heat management member 23, and the fourth heat management member 24 may be made of a material with high thermal conductivity, such as a metal material such as aluminum or copper.

[0126] An inlet and an outlet communicating with the heat exchange chamber are further formed in the first heat management member 21, the second heat management member 22, the third heat management member 23, and the fourth heat management member 24. The heat exchange medium can enter the heat management member through the inlet and be discharged from the heat management member through the outlet, strengthening the circulation of the heat exchange medium within the heat management member and the exchange of the heat exchange medium, and improving the heat exchange effect of the heat management member.

[0127] Referring to FIG. 2, some embodiments of the present application provide a battery 100, including a battery cell group 10 and a heat management device 20. The battery cell group 10 includes a plurality of battery cells 11. The heat management device 20 is used to adjust the temperature of the battery cell group 10. Here, at least two surfaces of the battery cell 11 are conductively connected to the heat management device 20.

[0128] In some embodiments, the heat management device 20 may include a first heat management member 21 and a second heat management member 22. The battery cells 11 have two first surfaces 111 installed opposite to each other along a first direction X and two second surfaces 112 installed opposite to each other along a second direction Y. At least one first surface 111 of the battery cell 11 is conductively connected to the first heat management member 21, and at least one second surface 112 of the battery cell 11 is conductively connected to the second heat management member 22. The first direction X is perpendicular to the second direction Y.

[0129] At least one first surface 111 and at least one second surface 112 of the battery cell 11 are conductively connected to the heat management device 20, whereby the battery cell 11 can achieve heat exchange through two perpendicular surfaces, further realizing heat exchange in multiple directions, which is beneficial to improving the reliability of the heat exchange of the battery cell 11.

[0130] In some embodiments, a plurality of first heat management members 21 are provided. The plurality of first heat management members 21 are arranged at intervals along the first direction X, and at least one battery cell 11 is arranged between two adjacent first heat management members 21. Two first surfaces 111 of the battery cell 11 are respectively connected to the two first heat management members 21 in a thermally conductive manner.

[0131] Compared with the structure in which the battery cell 11 is clamped between two adjacent first heat management members 21 installed independently, the plurality of battery cells 11 arranged along the second direction Y share the two first heat management members 21, simplify the structure and production and installation process of the heat management device 20, reduce the number of the first heat management members 21, thereby reducing the additional structure (such as the mounting and fixing structure) of the first heat management members 21, saving the production cost of the battery, and at the same time reducing the space occupied by the additional structure of the first heat management members 21, which is beneficial to improving the energy density of the battery 100.

[0132] In some embodiments, a plurality of second heat management members 22 are provided. The plurality of second heat management members 22 are arranged at intervals along the second direction Y, and at least one battery cell 11 is arranged between two adjacent second heat management members 22. Two second surfaces 112 of the battery cell 11 are respectively connected to the two second heat management members 22 in a thermally conductive manner.

[0133] Two second surfaces 112 of the battery cell 11 are respectively connected to the two second heat management members 22 in a thermally conductive manner. The battery cell 11 can realize heat exchange through the two second surfaces 112, which is further beneficial to making the distribution of the heat exchange area of the battery cell 11 more uniform and further improving the performance stability of the battery 100.

[0134] In some embodiments, the first surface 111 is the surface with the largest area in the battery cell 11.

[0135] By thermally connecting the first surface 111 with the largest area of the battery cell 11 to the first heat management member 21, the heat exchange area of the battery cell 11 can be further improved, thereby increasing the heat management efficiency of the heat management device 20 for the battery cell 11.

[0136] In some embodiments, the third heat exchange chamber of the third heat management member 23 may include a plurality of flow paths, and the width of the flow path in the middle part of the third heat management member 23 is larger than the width of the flow paths in other parts of the third heat management member 23.

[0137] Here, the plurality of flow paths may be installed in parallel or be a passage that winds in an S shape.

[0138] By making the width of the flow path in the middle part of the third heat management member 23 larger than the width of the flow paths in other parts of the third heat management member 23, the flow rate of the heat exchange medium passing through the flow path in the middle part of the third heat management member 23 can be made larger than the flow rate of the heat exchange medium passing through the flow paths in other parts of the third heat management member 23. Furthermore, the heat exchange effect on the middle part of the battery cell group 10 in the middle part of the third heat management member 23 can be improved, thereby alleviating the problem that the middle part of the battery cell group 10 is more likely to overheat.

[0139] In some embodiments, the thickness of the first heat management member 21 may be thinner than at least one of the thicknesses of the second heat management member 22, the third heat management member 23, and the fourth heat management member 24.

[0140] After the battery cell 11 has been used for a certain period of time, expansion may occur, and since expansion is likely to start from the first surface with the largest area in the battery cell 11, by setting the thickness of the first heat management member 21 to be smaller than at least one of the thicknesses of the second heat management member 22, the third heat management member 23, and the fourth heat management member 24, the first heat management member 21 can be deformed under force, thereby ensuring a space for the expansion of the battery cell 11.

[0141] In some embodiments, at least one of the first heat management member 21, the second heat management member 22, the third heat management member 23, and the fourth heat management member 24 is connected to the battery cell 11 by a thermally conductive adhesive.

[0142] By connecting at least one of the first heat management member 21, the second heat management member 22, the third heat management member 23, and the fourth heat management member 24 to the battery cell 11 by a thermally conductive adhesive, the heat exchange effect between the heat management device 20 and the battery cell 11 can be further improved, and the position regulation and support action of the heat management device 20 on the battery cell 11 can be further strengthened, which is advantageous for further improving the structural stability of the battery 100. At the same time, the thermally conductive adhesive can further play a buffering role against the expansion and deformation of the battery cell 11, which is advantageous for further improving the safety of the battery 100.

[0143] In some embodiments, the first heat management member 21, the second heat management member 22, and the third heat management member 23 may be integrally formed.

[0144] By integrally forming the first heat management member 21, the second heat management member 22, and the third heat management member 23, the structural strength of the heat management device 20 can be further improved, which is advantageous for simplifying the assembly process of the battery 100.

[0145] Some embodiments of the present application provide a power consumption device, which includes the battery 100 described in any one of the above solutions, and the battery 100 is used to provide electrical energy.

[0146] Here, the power consumption device may be a system or device that uses any of the aforementioned batteries 100.

[0147] Referring to FIGS. 3 and 6, some embodiments of the present application provide a battery 100, which includes a battery cell group 10 and a thermal management device 20. The battery cell group 10 includes a plurality of battery cells 11, and the thermal management device 20 includes a plurality of first thermal management members 21, a plurality of second thermal management members 22, a third thermal management member 23, and a plurality of fourth thermal management members 24. The plurality of battery cells 11 are arranged in a matrix along the first direction X and the second direction Y respectively. The plurality of first thermal management members 21 are installed intersecting the plurality of battery cells 11 along the first direction X. The plurality of second thermal management members 22 are installed intersecting the plurality of battery cells 11 along the second direction Y. The third thermal management member 23 is installed on one side of the battery cell group 10 along the third direction Z. The plurality of fourth thermal management members 24 are installed on the other side of the battery cell group 10 along the third direction Z. Among them, the fourth thermal management member 24 includes a first sub-thermal management member 241 and a second sub-thermal management member 242. The first sub-thermal management member 241 is installed on the shoulders of two adjacent battery cells 11 along the second direction Y. The second sub-thermal management member 242 is installed between the two electrode terminals 115 of the battery cell 11.

[0148] The first thermal management member 21 is installed in a plate shape, and the thickness direction is parallel to the first direction X. The second thermal management member 22 is installed in a plate shape, and the thickness direction is parallel to the second direction Y. The third thermal management member 23 is installed in a plate shape, and the thickness direction is parallel to the third direction Z. The fourth thermal management member 24 is installed in a plate shape, and the thickness direction is parallel to the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0149] The first thermal management member 21, the second thermal management member 22, and the third thermal management member 23 are fixedly connected. The fourth thermal management member 24 is fixedly connected to the end faces of the first thermal management member 21 and the second thermal management member 22 along the third direction Z. The plurality of fourth thermal management members 24 are connected by a current collecting member 26.

[0150] The first heat management member 21, the second heat management member 22, the third heat management member 23, and the fourth heat management member 24 are each connected to the battery cell 11 via a thermally conductive adhesive.

[0151] Heat exchange chambers for accommodating a heat exchange medium are respectively formed in the first heat management member 21, the second heat management member 22, the third heat management member 23, and the fourth heat management member 24, and the heat exchange chamber of the first heat management member 21, the heat exchange chamber of the second heat management member 22, the heat exchange chamber of the third heat management member 23, and the heat exchange chamber of the fourth heat management member 24 communicate with each other.

[0152] The heat exchange chamber of the third heat management member 23 includes a plurality of flow paths, and the width of the flow path in the middle part of the third heat management member 23 is larger than the width of the flow paths in other parts of the third heat management member 23.

[0153] The thickness of the first heat management member 21 is thinner than the thickness of the second heat management member 22, the thickness of the third heat management member 23, and the thickness of the fourth heat management member 24.

[0154] It should be noted that as long as there is no conflict, the embodiments and the features in the embodiments in this application can be combined with each other.

[0155] The above are only preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, various modifications and changes are possible to this application. Any modifications, equivalent replacements, improvements, etc. made within the scope of the spirit and principle of this application should all be included within the protection scope of this application.

Description of Reference Numerals

[0156] 1000 - Vehicle, 100 - Battery, 10 - Battery cell group, 11 - Battery cell, 111 - First surface, 112 - Second surface, 113 - Third surface, 114 - Fourth surface, 115 - Electrode terminal, 20 - Thermal management device, 21 - First thermal management member, 22 - Second thermal management member, 23 - Third thermal management member, 24 - Fourth thermal management member, 241 - First sub-thermal management member, 242 - Second sub-thermal management member, 26 - Current collector member, 200 - Controller, 300 - Motor.

Claims

1. A battery, comprising: a battery cell group including a plurality of battery cells; and a thermal management device for regulating the temperature of the battery cell group, wherein at least two surfaces of the battery cells are thermally conductively connected to the thermal management device. The battery is characterized by this.

2. The thermal management device includes a plurality of first thermal management members. The plurality of first thermal management members are installed at intervals along a first direction, and at least one of the battery cells is installed between two adjacent first thermal management members. The battery cell has two first surfaces installed opposite to each other along the first direction, and the two first surfaces of the battery cell are respectively thermally conductively connected to two of the first thermal management members. The battery according to claim 1 is characterized by this.

3. A first heat exchange chamber for accommodating a heat exchange medium is formed in the first thermal management member, and the first heat exchange chambers of the plurality of first thermal management members communicate with each other. The battery according to claim 2 is characterized by this.

4. A plurality of the battery cells arranged along a second direction are installed between two adjacent first thermal management members, and the second direction is perpendicular to the first direction. The battery according to claim 2 is characterized by this.

5. The thermal management device further includes a plurality of second thermal management members. The plurality of second thermal management members are installed at intervals along the second direction, and at least one of the battery cells is installed between two adjacent second thermal management members. The battery cell has two second surfaces installed opposite to each other along the second direction, and the two second surfaces of the battery cell are respectively thermally conductively connected to two of the second thermal management members. The battery according to claim 4 is characterized by this.

6. A first heat exchange chamber for accommodating a heat exchange medium is formed in the first thermal management member, and a second heat exchange chamber for accommodating a heat exchange medium is formed in the second thermal management member. The second heat exchange chamber communicates with the first heat exchange chamber. The battery according to claim 5 is characterized by this.

7. The thermal management device further includes a third thermal management member. The third thermal management member is installed on one side along a third direction of the battery cell group, and the third direction is perpendicular to the first direction. The battery cell has a third surface, and the third surface of the battery cell is thermally conductively connected to the third heat management member. The battery according to claim 2, characterized in that.

8. A first heat exchange chamber for accommodating a heat exchange medium is formed in the first heat management member, and a third heat exchange chamber for accommodating a heat exchange medium is formed in the third heat management member. The third heat exchange chamber communicates with the first heat exchange chamber. The battery according to claim 7, characterized in that.

9. The battery cell further has a fourth surface, the fourth surface and the third surface are installed opposite to each other along the third direction, and the electrode terminal of the battery cell is installed on the fourth surface. The battery according to claim 8, characterized in that.

10. The battery cell further has a fourth surface, the electrode terminal of the battery cell is installed on the fourth surface, the heat management device further includes a fourth heat management member, and the fourth heat management member is installed on one side along the third direction of the battery cell group. The fourth surface of the battery cell is thermally conductively connected to the fourth heat management member, and the third direction is perpendicular to the first direction. The battery according to claim 2, characterized in that.

11. When observed along the third direction, the fourth heat management member does not overlap with the electrode terminal of the battery cell. The battery according to claim 10, characterized in that.

12. A pressure relief mechanism is installed on the fourth surface of the battery cell. When observed along the third direction, the fourth heat management member and the pressure relief mechanism do not overlap. The battery according to claim 10, characterized in that.

13. A plurality of the fourth heat management members are installed, the fourth heat management members extend along the first direction, and the plurality of the fourth heat management members are installed at intervals along the second direction. The first direction, the second direction, and the third direction are perpendicular to each other. The battery according to claim 10, characterized in that.

14. The heat management device further includes a current collecting member. The current collecting member is connected to a plurality of the fourth heat management members, a fourth heat exchange chamber for accommodating a heat exchange medium is formed in the fourth heat management member, a current collecting cavity for accommodating a heat exchange medium is formed in the current collecting member, and the fourth heat exchange chamber communicates with the current collecting cavity. The battery according to claim 13, wherein the battery is characterized in that.

15. Two current collecting members are provided, the two current collecting members are installed at intervals along the first direction, and both ends of the fourth heat management member are respectively connected to the two current collecting members. The battery according to claim 14, wherein the battery is characterized in that.

16. A first heat exchange chamber for accommodating a heat exchange medium is formed in the first heat management member, a fourth heat exchange chamber for accommodating a heat exchange medium is formed in the fourth heat management member, and the fourth heat exchange chamber communicates with the first heat exchange chamber. The battery according to claim 10, wherein the battery is characterized in that.

17. The heat management device includes a first heat management member and a second heat management member. The battery cells have two first surfaces installed opposite to each other along a first direction and two second surfaces installed opposite to each other along a second direction. At least one of the first surfaces of the battery cells is thermally conductively connected to the first heat management member, at least one of the second surfaces of the battery cells is thermally conductively connected to the second heat management member, and the first direction is perpendicular to the second direction. The battery according to claim 1, wherein the battery is characterized in that.

18. A plurality of the first heat management members are provided, the plurality of the first heat management members are installed at intervals along the first direction, at least one of the battery cells is installed between two adjacent ones of the first heat management members, and the two first surfaces of the battery cell are respectively thermally conductively connected to the two first heat management members. The battery according to claim 17, wherein the battery is characterized in that.

19. A plurality of the second heat management members are provided, the plurality of the second heat management members are installed at intervals along the second direction, at least one of the battery cells is installed between two adjacent ones of the second heat management members, and the two second surfaces of the battery cell are respectively thermally conductively connected to the two second heat management members. The battery according to claim 17, wherein the battery is characterized in that.

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

21. A power consumption device, comprising the battery according to any one of claims 1 to 20, wherein the battery is used to provide electrical energy.

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