Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a box body and a plurality of battery monomers arranged in the box body, the plurality of battery monomers are stacked into at least one row in a first direction, at least two battery monomers in one row of battery monomers are set as first battery monomers, and the first battery monomers are set as second battery monomers; the first battery monomer comprises a shell and an electrode assembly arranged in the shell, a heat exchange wall is arranged on one side wall of the shell, a heat exchange flow channel is arranged in the heat exchange wall, a liquid inlet pipe and a liquid outlet pipe facing a first direction are formed in the shell, and the liquid inlet pipe and the liquid outlet pipe are respectively communicated with a liquid inlet end and a liquid outlet end of the heat exchange flow channel; the liquid inlet pipes of the two shells are in butt joint communication in the first direction, and the liquid outlet pipes of the two shells are in butt joint communication in the first direction. According to the technical scheme provided by the invention, the heat exchange flow channel is directly formed in the heat exchange wall of the shell, and the heat exchange efficiency of the heat exchange liquid and the battery monomers is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric equipment. BACKGROUND

[0002] In the existing new energy vehicles, the power battery pack as a very important energy supply system needs to meet the fast charging and high power demand, therefore the battery system generally needs to regulate the temperature of the battery monomer in the power battery pack through the heat management system, at present, the heat exchange efficiency between the heat exchange plate and the battery monomer in the heat management system is low, which is difficult to meet the heat management demand of the power battery pack. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a battery device and an electric equipment, which aims to improve the problem of low heat exchange efficiency between the heat exchange plate and the battery monomer in the power battery pack.

[0004] In a first aspect, the battery device provided by the present application comprises:

[0005] A box body; and

[0006] A plurality of battery monomers arranged in the box body, the plurality of battery monomers are arranged in at least one column in the first direction, and at least two battery monomers in the column are arranged as first battery monomers.

[0007] The first battery monomer comprises a shell and an electrode assembly arranged in the shell, one side wall of the shell is arranged as a heat exchange wall, a heat exchange flow channel is arranged in the heat exchange wall, the shell is formed with a liquid inlet pipe and a liquid outlet pipe towards the first direction, the liquid inlet pipe is in communication with the liquid inlet end of the heat exchange flow channel, the liquid outlet pipe is in communication with the liquid outlet end of the heat exchange flow channel, and the liquid inlet pipes of the two shells are in communication with each other in the first direction, and the liquid outlet pipes of the two shells are in communication with each other in the first direction.

[0008] In the process of flowing of the heat exchange liquid in the heat exchange flow channel, the heat generated by the electrode assembly in the shell can be directly transmitted to the heat exchange liquid through the heat exchange wall with high thermal conductivity, or the heat carried by the heat exchange liquid can be directly transmitted to the electrode assembly through the heat exchange wall with high thermal conductivity, which improves the heat exchange efficiency between the heat exchange liquid and the electrode assembly and meets the heat management demand of the battery device. Furthermore, the liquid inlet pipe is in communication with the liquid inlet pipe and the liquid outlet pipe is in communication with the liquid outlet pipe between the two adjacent first battery monomers, so that the heat exchange flow channels in the two heat exchange walls are in parallel communication, the heat exchange liquid in the external flow channel can flow into different heat exchange flow channels for heat exchange at the same time, the heat exchange influence between the first battery monomers is low, and each first battery monomer can be fully heat exchanged.

[0009] In some embodiments, the shell comprises:

[0010] a shell body having the heat exchange wall; and,

[0011] two current collecting portions arranged on the heat exchange wall and at the side ends of the heat exchange wall along the second direction, the inlet pipe and the outlet pipe being correspondingly formed in the two current collecting portions;

[0012] wherein the first direction intersects the second direction.

[0013] wherein the inlet pipe and the outlet pipe are correspondingly formed in the two current collecting portions, and the two current collecting portions are arranged on the heat exchange wall, so that the inlet pipe and the outlet pipe are in communication with the heat exchange flow channel. This arrangement can reduce the difficulty of forming the inlet pipe and the outlet pipe in communication with the heat exchange flow channel. Furthermore, arranging the two current collecting portions at the side ends of the heat exchange wall along the second direction has little effect on the adjacent two battery monomers stacked, can ensure the close stacking of the plurality of battery monomers, and is conducive to controlling the overall size of the plurality of battery monomers in the first direction.

[0014] In some embodiments, the shell further comprises a first end cover and a second end cover, the first end cover and the second end cover being arranged at the two ends of the shell body along the second direction, the electrode assembly being arranged in a receiving cavity formed by the shell body, the first end cover and the second end cover, the first end cover and / or the second end cover being provided with an electrode terminal, the electrode terminal being electrically connected with the electrode assembly;

[0015] the heat exchange flow channel is arranged through the heat exchange wall along the second direction;

[0016] the two current collecting portions are arranged corresponding to the two side openings of the heat exchange flow channel, respectively.

[0017] wherein the first end cover and the second end cover are arranged at the two sides of the shell body along the second direction, the receiving cavity of the shell body is through along the second direction before the shell body is connected with the first end cover and the second end cover, and the heat exchange flow channel is also arranged through the heat exchange wall along the second direction, so that the shell body can be formed with the receiving cavity and the heat exchange flow channel through the extrusion forming process, which greatly reduces the difficulty of forming the heat exchange flow channel and improves the processing efficiency of the shell.

[0018] In some embodiments, the heat exchange wall is arranged extending along the second direction;

[0019] the two current collecting portions are arranged at the two sides of the heat exchange wall along the second direction, respectively.

[0020] The heat exchange wall is arranged to extend along the second direction, which means that the size of the single battery cell along the second direction is increased, so that the specification of the electrode assembly in the accommodating cavity of the battery cell can be improved as a whole, thereby replacing the layout scheme of multiple rows of battery cells arranged in the second direction, reducing the waste of space in the box, and improving the energy density of the battery device. The two current collecting parts are arranged on the two sides of the heat exchange wall along the second direction, respectively, so that the heat exchange liquid can be injected and discharged from the two sides of the heat exchange wall, respectively, and the influence of heat exchange between the two current collecting parts can be reduced.

[0021] In some embodiments, the end of the liquid inlet pipe and / or the liquid outlet pipe has a plug connector which is arranged to extend along the first direction.

[0022] The plug connector is formed at the end of the liquid inlet pipe and the liquid outlet pipe, so that the two current collecting parts opposite to each other along the first direction of the two adjacent first battery cells can be connected in communication through the plug connector, which reduces the difficulty of connecting the liquid inlet pipe and the liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe. Meanwhile, the plug connector provides more contact area, which is conducive to improving the sealing performance of the connection between the pipes.

[0023] In some embodiments, the heat exchange flow channel includes a plurality of flow channel segments extending along the second direction and arranged along the third direction, and the plurality of flow channel segments are connected in series at the head and tail;

[0024] The first direction, the second direction and the third direction intersect with each other.

[0025] The heat exchange flow channel is arranged to extend and bend along the second direction and the third direction by a plurality of flow channel segments connected in series, so that the heat exchange flow channel can extend and arrange at various local positions in the heat exchange wall, ensuring uniform heat exchange between the heat exchange flow channel and the heat exchange wall.

[0026] In some embodiments, the box includes a box body and a box cover in the third direction;

[0027] In the third direction, the liquid inlet pipe is arranged closer to the box cover than the liquid outlet pipe;

[0028] The first direction intersects with the third direction.

[0029] Because the liquid inlet pipe is arranged closer to the box cover than the liquid outlet pipe in the third direction, the liquid inlet pipe is arranged higher than the liquid outlet pipe, and during the process of the heat exchange liquid passing through the heat exchange flow channel from the liquid inlet pipe to the liquid outlet pipe, the heat exchange liquid is affected by gravity, so that the flow resistance of the heat exchange liquid is smaller, and the noise generated by the flow of the heat exchange liquid in the heat exchange flow channel is also reduced.

[0030] In some embodiments, a side wall of the shell in the first direction is the heat exchange wall.

[0031] In some embodiments, a side wall of the shell in the first direction is the heat exchange wall.

[0032] In some embodiments, a second battery cell is arranged between two adjacent first battery cells in a row of the battery cells, and the second battery cell is in contact with the heat exchange wall of at least one of the first battery cells.

[0033] In some embodiments, a second battery cell is arranged between two adjacent first battery cells in a row of the battery cells, and the second battery cell is in contact with the heat exchange wall of at least one of the first battery cells.

[0034] In some embodiments, the second battery cell is in contact with the heat exchange wall of the corresponding first battery cell to form a heat exchange battery group, and a plurality of heat exchange battery groups are arranged in the first direction.

[0035] In some embodiments, the second battery cell is in contact with the heat exchange wall of the corresponding first battery cell to form a heat exchange battery group, and a plurality of heat exchange battery groups are arranged in the first direction.

[0036] In some embodiments, a heat insulation pad is arranged on a side of the first battery cell away from the second battery cell and / or on a side of the second battery cell away from the first battery cell in the heat exchange battery group.

[0037] In some embodiments, a heat insulation pad is arranged on a side of the first battery cell away from the second battery cell and / or on a side of the second battery cell away from the first battery cell in the heat exchange battery group.

[0038] In some embodiments, a heat insulation pad is arranged on a side of the first battery cell away from the second battery cell and / or on a side of the second battery cell away from the first battery cell in the heat exchange battery group. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0040] Figure 1 The structure diagram of an embodiment of the vehicle provided by the present application is shown in the following figure.

[0041] Figure 2 The exploded structure diagram of an embodiment of the battery device provided by the present application is shown in the following figure.

[0042] Figure 3 The assembly structure diagram of the box and the battery cell in the battery device provided by the present application is shown in the following figure.

[0043] Figure 4 The partial exploded structure diagram of the plurality of battery cells in the battery device provided by the present application is shown in the following figure.

[0044] Figure 5 The structure diagram of an embodiment of the first battery cell in the battery device provided by the present application is shown in the following figure. Figure 4

[0045] The exploded structure diagram of the first battery cell in the battery device provided by the present application is shown in the following figure. Figure 6 Figure 5 The top view structure diagram of the first battery cell in the battery device provided by the present application is shown in the following figure.

[0046] Figure 7 Figure 5 The partial structure diagram of the section A-A in the battery device provided by the present application is shown in the following figure.

[0047] Figure 8 The partial structure diagram of the section B-B in the battery device provided by the present application is shown in the following figure. Figure 7

[0048] Figure 9 Figure 7

[0049] The structure diagram of an embodiment of the vehicle provided by the present application is shown in the following figure.

[0050] 1000, vehicle;

[0051] 100, battery device; 200, controller; 300, motor;

[0052] ​​​​​1, box; 1a, mounting cavity; 11, box main body; 12, box cover; 2, battery monomer; 2a, first battery monomer; 2b, second battery monomer; 21, shell; 21a, heat exchange flow channel; 211a, flow channel section; 21b, containing cavity; 211, shell main body; 2111, heat exchange wall; 212, current collecting part; 212a, liquid inlet pipe; 212b, liquid outlet pipe; 212c, series flow channel; 2121, plug; 213, first end cover; 214, second end cover; 215, electrode terminal; 3, heat insulation pad; 4, connecting pipeline;

[0053] X, first direction; Y, second direction; Z, third direction.

[0054] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0055] The embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of the present application, the technical terms "first", "second", 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 "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0058] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0060] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0061] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled 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.

[0062] In the existing new energy vehicles, the power battery pack as a very important energy supply system needs to meet the fast charging and high power demand, so the battery system generally needs to regulate the temperature of the battery monomer in the power battery pack through the thermal management system, for example, effectively dissipating heat when the battery monomer temperature rises, preventing thermal runaway accidents, preheating when the battery monomer temperature is low, and improving the battery temperature to ensure the charging and discharging performance and safety at low temperature.

[0063] The current mainstream thermal management method is to contact the battery monomer shell through the heat exchange plate, and to bring or take away heat through the heat exchange liquid flowing in the heat exchange plate, so as to realize the heat exchange between the heat exchange plate and the battery monomer. However, the contact heat exchange efficiency between the heat exchange plate and the battery monomer in the current thermal management system is low, which is difficult to meet the thermal management demand of the power battery pack.

[0064] By analyzing the causes of the above problems, it can be known that the heat exchange plate and the battery monomer are relatively independent, and the heat transfer is mainly through the heat conductive glue. The purpose is to fill the gap between the heat exchange plate and the battery monomer by using its high compressibility, so as to make up for the air thermal resistance. However, due to the limitation of its own high compressibility material, the thermal conductivity of the heat conductive glue is far less than that of the current common metal. For example, the thermal conductivity of the current high-quality heat conductive glue is usually about 2.0 W / m·K, while the thermal conductivity of aluminum is more than 200 W / m·K. Therefore, the setting of the heat conductive glue between the heat exchange plate and the battery monomer greatly limits the heat exchange efficiency between the heat exchange plate and the battery monomer, and also limits the grouping efficiency of the power battery pack.

[0065] Further analysis shows that the heat exchange plate and the shell of the battery monomer are mostly made of the same alloy material, such as aluminum alloy. The two components made of the same material are assembled and fixed after being produced respectively. The heat exchange plate and the battery monomer can be directly integrated during production to cancel the setting of the heat-conducting glue, so that the heat is directly transmitted in the overall metal shell, and the transmission efficiency of the heat from the shell to the heat exchange plate can be greatly improved.

[0066] The battery device provided by the embodiments of the present application can be used to provide electric energy for the electric equipment, wherein the electric equipment can be, but is not limited to, a battery car, an electric vehicle, a ship, a spacecraft, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0067] The following embodiments are described by taking a vehicle 1000 as an example for convenience of description.

[0068] Please refer to Figure 1 , Figure 1 The structure diagram of an embodiment of the vehicle provided by the present application is shown. The vehicle 1000 can be a fuel car, a gas car or a new energy car. The new energy car can be a pure electric car, a hybrid car or an extended range car. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0069] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0070] The battery device 100 provided by the present application can be applied to the electric equipment, which can at least improve the problem of low heat exchange efficiency between the heat exchange plate and the battery monomer in the power battery pack.

[0071] In order to facilitate understanding of the battery device 100 provided by the present application, the following will be described with reference to the accompanying drawings, wherein, Figure 1 The structure diagram of an embodiment of the vehicle provided by the present application is shown; Figure 2 The exploded structure diagram of an embodiment of the battery device provided by the present application is shown; Figure 3An assembly structure diagram of a battery device provided in the present application is shown in FIG. 1, which shows an assembly structure of a box and a battery cell in the battery device. Figure 4 A partial exploded structure diagram of a plurality of battery cells in the battery device provided in the present application is shown in FIG. 2. Figure 5 A structure diagram of a first battery cell in the battery device provided in the present application is shown in FIG. 3. Figure 4 A partial exploded structure diagram of the first battery cell in the battery device provided in the present application is shown in FIG. 4. Figure 6 A top view structure diagram of the first battery cell in the battery device provided in the present application is shown in FIG. 5. Figure 5 A partial structure diagram of a cross section A-A of the first battery cell in the battery device provided in the present application is shown in FIG. 6. Figure 7 A partial structure diagram of a cross section B-B of the first battery cell in the battery device provided in the present application is shown in FIG. 7. Figure 5 A top view structure diagram of the first battery cell in the battery device provided in the present application is shown in FIG. 8. Figure 8 A partial structure diagram of a cross section A-A of the first battery cell in the battery device provided in the present application is shown in FIG. 9. Figure 7 A partial structure diagram of a cross section B-B of the first battery cell in the battery device provided in the present application is shown in FIG. 10. Figure 9 A top view structure diagram of the first battery cell in the battery device provided in the present application is shown in FIG. 11. Figure 7 A partial structure diagram of a cross section A-A of the first battery cell in the battery device provided in the present application is shown in FIG. 12.

[0072] Please refer to Figures 3 to 5 , Figure 7 and Figure 8 In an embodiment of the present application, the battery device 100 includes a box 1 and a plurality of battery cells 2, the plurality of battery cells 2 are arranged in the box 1, the plurality of battery cells 2 are arranged in at least one column in a first direction X, and at least two battery cells 2 in the column of battery cells 2 are arranged as first battery cells 2a; the first battery cell 2a includes a shell 21 and an electrode assembly arranged in the shell 21, one side wall of the shell 21 is arranged as a heat exchange wall 2111, the heat exchange wall 2111 is arranged with a heat exchange flow channel 21a, the shell 21 is formed with a liquid inlet pipe 212a and a liquid outlet pipe 212b facing the first direction X, the liquid inlet pipe 212a is in communication with a liquid inlet end of the heat exchange flow channel 21a, the liquid outlet pipe 212b is in communication with a liquid outlet end of the heat exchange flow channel 21a, and the liquid inlet pipes 212a of the two shells 21 are in communication with each other in the first direction X, and the liquid outlet pipes 212b of the two shells 21 are in communication with each other in the first direction X.

[0073] It should be noted that the first direction X mentioned in the present embodiment and the second direction Y and the third direction Z mentioned in the following embodiments generally belong to three directions intersecting with each other in a three-dimensional space, and the included angle between adjacent two directions is generally 90 degrees, that is, the first direction X, the second direction Y and the third direction Z are perpendicular to each other, but are not limited thereto, and the included angle between adjacent two directions can also be any other angle value, and after the battery device 100 is correctly installed on the vehicle 1000, the first direction X is generally coincident with the up-down direction of the vehicle 1000.

[0074] The box 1 is the main loading component of the battery device 100, the battery device 100 is installed on the vehicle 1000 through the box 1, and the battery cells 2 are installed through the installation cavity 11a of the box 1, and the basic structure of the box 1 generally includes a box body 11 and a box cover 12 (as shown in FIG. 13). Figure 2As shown in the figure, the box cover 12 is arranged on the box body 11 and cooperates with the box body 11 to define the mounting cavity 1a. Generally, the battery monomer 100 is arranged on the box body 11, and after the battery device 100 is mounted on the vehicle 1000, the box cover 12 is generally close to the vehicle 1000, and the box body 11 is generally away from the vehicle 1000. The mounting cavity 11a can be mainly formed in the box body 11, and at this time, the box body 11 can be understood as a basin-shaped structure, and the box cover 12 is arranged on the box body 11 to cover the mounting cavity 11a. The mounting cavity 11a can also be mainly formed in the box cover 12, and at this time, the box cover 12 can be understood as a cover-shaped structure, and the box cover 12 is arranged on the box body 11 to cover the battery monomer 100 arranged on the box body 11 into the box cover 12. Of course, the structure of the box body 1 is not limited to this, and the embodiment does not limit it.

[0075] The "a plurality of battery monomers 2 are arranged in at least one column in the first direction X" means that the plurality of battery monomers 2 can be stacked in one column in the first direction X, or stacked in multiple columns in the first direction X and arranged in multiple rows in the second direction Y. The plurality of battery monomers 2 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the plurality of battery monomers 2 are connected in series and in parallel. The plurality of battery monomers 2 can be directly connected in series, in parallel, or in a mixed manner, and then the battery whole formed by the plurality of battery monomers 2 is accommodated in the mounting cavity 1a of the box body 1. Of course, the battery monomer 2 can also be in the form that the plurality of battery monomers 2 are connected in series, in parallel, or in a mixed manner to form a battery module (for example, the plurality of battery monomers 2 stacked in one column), and then the plurality of battery modules are connected in series, in parallel, or in a mixed manner to form a battery whole (for example, the plurality of battery monomers 2 arranged in multiple rows), and then the battery whole is accommodated in the mounting cavity 1a of the box body 1. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing electrical connection between the plurality of battery monomers 2 or the plurality of battery modules. Each battery monomer 2 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to this. The battery monomer 2 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0076] The "at least two battery monomers 2 in the column of battery monomers 2 are arranged as first battery monomers 2a" can be understood as that there are only two first battery monomers 2a in the plurality of battery monomers 2, or there can be more first battery monomers 2a, or even all the battery monomers 2 can be arranged as first battery monomers 2a. The two adjacent first battery monomers 2a can be directly abutted, or a second battery monomer 2b different from the first battery monomer 2a can be arranged between the two adjacent first battery monomers 2a, and the number of the second battery monomer 2b can be one, two, or multiple.

[0077] The structure of the battery cell 2 generally comprises a casing 21 and an electrode assembly, the casing 21 generally has a receiving cavity 21b formed therein, the electrode assembly is installed in the receiving cavity 21b and is led out of the casing 21 through electrode terminals 215 provided on the casing wall of the casing 21 to be connected to the busbar component of the battery device 100. The "electrode assembly" is generally composed of a positive electrode sheet, a negative electrode sheet and a separator film, wherein the lithium ion electrode assembly mainly works by the reciprocal de-intercalation and intercalation of lithium ions between the positive electrode sheet and the negative electrode sheet. The positive electrode materials currently used for lithium ion electrode assemblies mainly include lithium cobalt oxide (LiCoO2), lithium manganate (LiMn2O4), lithium nickelate (LiNiO2) and lithium iron phosphate (LiFePO4). The separator film is arranged between the positive electrode sheet and the negative electrode sheet to form a three-layer material film structure, which is generally wound or stacked into an electrode assembly with a desired shape. For example, the three-layer material film structure in the casing of a cylindrical battery cell is wound into an electrode assembly with a cylindrical shape, and the three-layer material film structure in the casing of a square battery cell is wound or stacked into an electrode assembly with a generally cuboid shape.

[0078] Unlike other types of battery cells 2, one side wall of the casing 21 of the first battery cell 2a is provided as a heat exchange wall 2111, which is a side wall involved in defining the receiving cavity 21b, and the heat exchange wall 2111 has a heat exchange flow channel 21a formed therein, which is used for the flow of heat exchange liquid, which can be any type of heat transfer medium, such as water or oil. When the heat exchange liquid flows through the heat exchange flow channel 21a, it can directly exchange heat with the electrode assembly in the receiving cavity 21b of the casing 21 through the heat exchange wall 2111; the number of side walls of the casing 21 is generally multiple, for example, taking a square casing as an example, the number of side walls is six, wherein the side wall that is the heat exchange wall 2111 can be one, multiple or even all six, the heat exchange walls 2111 can form heat exchange flow channels 21a individually or extend to multiple heat exchange walls 2111 through one complete heat exchange flow channel 21a, which is not limited in the present embodiment;

[0079] Generally, the shell 21 is formed with an inlet pipe 212a and an outlet pipe 212b, and the inlet pipe 212a and the outlet pipe 212b respectively extend towards the first direction X, the present embodiment does not limit the setting position of the inlet pipe 212a and the outlet pipe 212b, for example, the inlet pipe 212a and the outlet pipe 212b can be directly arranged on the heat exchange wall 2111, or can be arranged on other side walls of the shell 21, as long as the inlet pipe 212a and the outlet pipe 212b can communicate with the heat exchange flow channel 21a in the heat exchange wall 2111. The two first battery monomers 2a adjacent to each other are arranged in the first direction X, and the inlet pipe 212a and the outlet pipe 212b in the shell 21 also extend in the first direction X, therefore, the inlet pipe 212a of the two shells 21 can be butt-jointed and communicated with each other in the first direction X, and the outlet pipe 212b of the two shells 21 can also be butt-jointed and communicated with each other in the first direction X, and the butt-joint communication can be realized in various ways, for example, two connecting pipes 4 are arranged between the two first battery monomers 2a, and the two ends of each connecting pipe 4 are respectively inserted into the corresponding inlet pipe 212a or the corresponding outlet pipe 212b, so as to realize the butt-joint communication, of course, it is also possible that the inlet pipe 212a of the two first battery monomers 2a is directly inserted and communicated, and the outlet pipe 212b of the two first battery monomers 2a is directly inserted and communicated; it should be noted that the inlet pipe 212a and the outlet pipe 212b cannot be understood as a pipe with a columnar shape in a narrow sense, and the inlet pipe 212a and the outlet pipe 212b can also be formed by opening an inlet passage and an outlet passage on an irregular shell 21.

[0080] The technical scheme provided in the application includes at least two first battery monomers 2a in the plurality of battery monomers 2 stacked along the first direction X in the box body 1 of the battery device 100, and one side wall of the shell 21 in the first battery monomers 2a is arranged as a heat exchange wall 2111, the heat exchange wall 2111 is formed with a heat exchange flow channel 21a, the heat exchange liquid flows into the heat exchange flow channel 21a through the liquid inlet pipe 212a formed in the shell 21, and flows out of the heat exchange flow channel 21a through the liquid outlet pipe 212b formed in the shell 21 after heat exchange with the heat exchange wall 2111. During the flow of the heat exchange liquid in the heat exchange flow channel 21a, the heat generated by the electrode assembly in the shell 21 can be directly transmitted to the heat exchange liquid through the heat exchange wall 2111 with a high thermal conductivity, or the heat carried by the heat exchange liquid can be directly transmitted to the electrode assembly through the heat exchange wall 2111 with a high thermal conductivity, thereby improving the heat exchange efficiency between the heat exchange liquid and the electrode assembly and meeting the heat management requirements of the battery device 100. Furthermore, the liquid inlet pipe 212a and the liquid inlet pipe 212a are connected in communication between the two adjacent first battery monomers 2a, the liquid outlet pipe 212b and the liquid outlet pipe 212b are connected in communication, the heat exchange flow channels 21a in the two heat exchange walls 2111 are connected in parallel, the heat exchange liquid in the external flow channel can flow into different heat exchange flow channels 21a for heat exchange at the same time, the heat exchange influence between the first battery monomers 2a is low, and sufficient heat exchange can be ensured for each first battery monomer 2a.

[0081] Please refer to Figure 6 In some embodiments, the shell 21 includes a shell body 211 and two current collecting parts 212, the shell body 211 has the heat exchange wall 2111, the two current collecting parts 212 are arranged on the heat exchange wall 2111 and are located at the side ends of the heat exchange wall 2111 along the second direction Y, the liquid inlet pipe 212a and the liquid outlet pipe 212b are formed in the two current collecting parts 212, and the first direction X intersects with the second direction Y.

[0082] It should be noted that, from the fact that the liquid inlet pipe 212a and the liquid outlet pipe 212b are correspondingly formed in the two collecting portions 212, it can be seen that the function of the collecting portion 212 is to collect and communicate the heat exchange flow channel 21a in the heat exchange wall 2111 to the external dry flow path (i.e. the parallel flow path between the two first battery monomers 2a), since the first direction X is the stacking direction of the plurality of battery monomers 2, and the second direction Y intersects the first direction X, the two collecting portions 212 are located at the side ends of the heat exchange wall 2111 along the second direction Y, and it can be understood that the two collecting portions 212 are located at the circumferential side of the heat exchange wall 2111 along the first direction X, so the existence of the collecting portion 212 has little effect on the stacking of the plurality of battery monomers 2; the two collecting portions 212 can be understood as being located at one side end of the heat exchange wall 2111 along the second direction Y, or the two collecting portions 212 are respectively located at two side ends of the heat exchange wall 2111 along the second direction Y; the connecting mode of the heat exchange wall 2111 and the collecting portion 212 has many possibilities, for example, the two are connected by welding, and the heat exchange flow channel 21a is communicated with the liquid inlet pipe 212a and the liquid outlet pipe 212b, and for example, the two are connected by adhesion, and the present embodiment does not limit this.

[0083] According to the above technical solution, the liquid inlet pipe 212a and the liquid outlet pipe 212b are correspondingly formed in the two collecting portions 212, and the two collecting portions 212 are arranged on the heat exchange wall 2111, so that the liquid inlet pipe 212a and the liquid outlet pipe 212b are communicated with the heat exchange flow channel 21a. This arrangement can reduce the difficulty of forming the communication between the liquid inlet pipe 212a, the liquid outlet pipe 212b and the heat exchange flow channel 21a. Furthermore, the two collecting portions 212 are arranged at the side ends of the heat exchange wall 2111 along the second direction Y, which has little effect on the stacking of the adjacent two battery monomers 2, and can ensure the close stacking of the plurality of battery monomers 2, which is beneficial to controlling the overall size of the plurality of battery monomers 2 in the first direction X.

[0084] In the field of new energy batteries, the forming of the heat exchange flow channel in the heat exchange plate of the power battery pack is generally realized by brazing. The processing mode of brazing is not described herein, however, the present embodiment relates to the forming of the heat exchange flow channel 21a on the side wall of the shell 21, and the brazing process for forming the heat exchange flow channel 21a may cause a reduction in production efficiency and an increase in production cost.

[0085] In view of this, please refer to Figure 6 and Figure 9In some embodiments, the shell 21 further comprises a first end cover 213 and a second end cover 214, the first end cover 213 and the second end cover 214 are arranged at two ends of the shell main body 211 along the second direction Y, the electrode assembly is arranged in a receiving cavity 21b formed by the shell main body 211, the first end cover 213 and the second end cover 214, the first end cover 213 and / or the second end cover 214 is / are provided with an electrode terminal 215, the electrode terminal 215 is electrically connected with the electrode assembly; the heat exchange flow channel 21a is arranged through the heat exchange wall 2111 along the second direction Y; two current collecting portions 212 are respectively arranged corresponding to two side openings of the heat exchange flow channel 21a.

[0086] It should be noted that the "shell main body 211" refers to the main loading component of the shell 21, the receiving cavity 21b is usually formed in the shell main body 211 and arranged through in the second direction Y, the first end cover 213 and the second end cover 214 are arranged at two ends of the shell main body 211 along the second direction Y, thereby covering two side openings of the receiving cavity 21b to seal the receiving cavity 21b, and the electrode assembly is arranged in the receiving cavity 21b.

[0087] The "first end cover 213 and / or the second end cover 214 is / are provided with an electrode terminal 215" includes three parallel schemes of "the first end cover 213 is provided with an electrode terminal 215", "the second end cover 214 is provided with an electrode terminal 215" and "the first end cover 213 and the second end cover 214 are respectively provided with an electrode terminal 215". The electrode assembly usually has a positive tab formed on the positive plate and a negative tab formed on the negative plate, and correspondingly, the electrode terminal 215 usually includes a positive terminal and a negative terminal, and "the electrode terminal 215 is electrically connected with the electrode assembly" means that the positive terminal of the electrode terminal is electrically connected with the positive tab of the positive plate, and the negative terminal of the electrode terminal is electrically connected with the negative tab of the negative plate. In the embodiments of the present application, the positive terminal and the negative terminal of the electrode terminal 215 can be arranged in the first end cover 213 at the same time, can be arranged in the second end cover 214 at the same time, or can be arranged in the first end cover 213 and the second end cover 214 respectively.

[0088] It is worth mentioning that in the production process of the battery monomer 2, the first end cover 213 or the second end cover 214 usually needs to be pre-integrated with the electrode assembly and the electrode terminal 215, and the electrode assembly is installed into the accommodation cavity 21b, and then the first end cover 213, the second end cover 214 and the shell main body 211 are connected. The connection mode of the first end cover 213, the second end cover 214 and the shell main body 211 is usually integrally formed by welding, but is not limited thereto, and any connection mode that can ensure the connection strength and sealing performance can be used, such as adhesion. Since the heat exchange flow channel 21a is arranged through the heat exchange wall 2111 in the second direction Y, before the first end cover 213 and the second end cover 214 are connected to the shell main body 211, the heat exchange flow channel 21a and the accommodation cavity 21b are arranged through the shell main body 211 in the second direction Y. This also gives the heat exchange flow channel 21a and the accommodation cavity 21b more molding possibilities, for example, the heat exchange flow channel 21a and the accommodation cavity 21b are molded at the same time by an extrusion molding process. Based on this molding mode, at least the material of the shell main body 211 can be selected as an aluminum alloy. Of course, the materials of the first end cover 213 and the second end cover 214 can also be selected as an aluminum alloy.

[0089] According to the above technical solution, the first end cover 213 and the second end cover 214 are located on both sides of the shell main body 211 in the second direction Y. Before the first end cover 213 and the second end cover 214 are connected, the accommodation cavity 21b of the shell main body 211 is arranged through in the second direction Y, and the heat exchange flow channel 21a is also arranged through the heat exchange wall 2111 in the second direction Y. This makes the shell main body 211 can be molded with the accommodation cavity 21b and the heat exchange flow channel 21a at the same time by an extrusion molding process, which greatly reduces the molding difficulty of the heat exchange flow channel 21a and improves the processing efficiency of the shell 2.

[0090] In a conventional power battery pack, a plurality of battery monomers are usually arranged in multiple rows in a first direction and multiple columns in a second direction. The purpose is to achieve the output voltage and current requirements of the power battery pack by series connection, parallel connection or mixed connection of the plurality of battery monomers. However, the arrangement of multiple columns of battery monomers may generate a gap between adjacent two columns of battery monomers, thereby reducing the energy density of the power battery pack.

[0091] In view of this, please refer to Figure 5 and Figure 6 In some embodiments, the heat exchange wall 2111 extends in the second direction Y; and the two current collecting parts 212 are arranged on both sides of the heat exchange wall 2111 in the second direction Y, respectively.

[0092] It should be noted that "the heat exchange wall 2111 is arranged to extend along the second direction Y" can be understood as that the heat exchange wall 2111 is at the side end of the shell main body 211 along the first direction X, or at the side end of the shell main body 211 along the third direction Z, so that the heat exchange wall 2111 can extend along the second direction Y, and it can also be understood that the shell main body 211 is elongated in the second direction Y, which makes the accommodation cavity 21b of the shell main body 211 can accommodate larger size electrode assemblies.

[0093] According to the above technical solution, arranging the heat exchange wall 2111 to extend along the second direction Y means that the size of the single battery monomer 2 along the second direction Y is improved, so that the size of the electrode assembly in the accommodation cavity 21b of the battery monomer 2 can be improved as a whole, thereby replacing the layout scheme of arranging multiple rows of battery monomers 2 in the second direction Y, reducing the waste of space in the box body 1, and improving the energy density of the battery device 100; and arranging the two current collecting parts 212 on the two sides of the heat exchange wall 2111 along the second direction Y respectively, the heat exchange liquid can be injected and discharged from the two sides of the heat exchange wall 2111 respectively, reducing the influence of heat exchange that may exist between the two current collecting parts 212.

[0094] The above embodiments do not limit how the liquid inlet pipes 212a in the two shell bodies 21 are connected and communicated with each other in the first direction X, and how the liquid outlet pipes 212b in the two shell bodies 21 are connected and communicated with each other in the first direction X, please refer to Figure 5 and Figure 7 In some embodiments, the end of the liquid inlet pipe 212a and / or the liquid outlet pipe 212b has a plug connector 2121 arranged to extend along the first direction X.

[0095] It should be noted that "the end of the liquid inlet pipe 212a and / or the liquid outlet pipe 212b has a plug-in connector 2121" includes three parallel schemes: "the end of the liquid inlet pipe 212a has a plug-in connector 2121", "the end of the liquid outlet pipe 212b has a plug-in connector 2121", and "the ends of the liquid inlet pipe 212a and the liquid outlet pipe 212b respectively have plug-in connectors 2121". The liquid inlet pipe 212a and the liquid outlet pipe 212b can be provided with a plug-in connector 2121 on one side thereof along the first direction, or can be provided with a plug-in connector 2121 on each side thereof along the first direction. The two plug-in connectors 2121 on the two sides of the liquid inlet pipe 212a and the liquid outlet pipe 212b along the first direction X can be respectively connected in communication with the adjacent plug-in connectors 2121, or one side of the plug-in connector 2121 can be connected in communication with the adjacent plug-in connector 2121, and the other side of the plug-in connector 2121 can be connected in communication with the external heat exchange flow channel (the first battery monomer 2a is usually one of a plurality of first battery monomers 2a at the end of the first direction X). "The plug-in connector 2121 is arranged along the first direction X" is relative to the corresponding current collecting part 212, and can also be understood as the plug-in connector 2121 being a protrusion on the current collecting part 212 protruding towards the first direction X.

[0096] According to the above technical scheme, by forming the plug-in connector 2121 at the end of the liquid inlet pipe 212a and the liquid outlet pipe 212b, the two current collecting parts 212 of the two adjacent first battery monomers 2a along the first direction X can be connected in communication through the plug-in connector 2121, thereby reducing the difficulty of connecting the liquid inlet pipe 212a and the liquid inlet pipe 212a, and the liquid outlet pipe 212b and the liquid outlet pipe 212b. Meanwhile, the plug-in connector 2121 provides more contact area, which is conducive to improving the sealing performance of the connection between the pipes.

[0097] Please refer to Figure 6 and Figure 8 In some embodiments, the heat exchange flow channel 21a includes a plurality of flow channel segments 211a extending along the second direction Y and arranged along the third direction Z, and the plurality of flow channel segments 211a are connected in series at the ends thereof. The first direction X, the second direction Y and the third direction Z intersect with each other.

[0098] It should be noted that in the embodiments of the present application, the first direction X, the second direction Y and the third direction Z are three directions intersecting with each other in a three-dimensional space. For example, after the battery device 100 is correctly installed at the bottom of the electric equipment, the first direction X can be the front-rear direction of the electric equipment, the second direction Y can be the left-right direction of the electric equipment, and the third direction Z can be the up-down direction of the electric equipment. Of course, according to the installation position of the battery device 100 on the electric equipment, the orientations of the first direction X, the second direction Y and the third direction Z can also be different. The heat exchange flow channel 21a is arranged to include a plurality of flow channel segments 211a extending along the second direction Y and arranged along the third direction Z, and the plurality of flow channel segments 211a are in series communication at the head and tail. Specifically, the series communication can be achieved through the series flow channel 212c provided in the heat exchange flow channel 21a, or can be achieved through the series flow channel 212c formed in the other regions of the shell 21 except the heat exchange wall 2111, for example, through the series flow channel 212c formed in the flow collecting part 212 arranged at the end of the heat exchange wall 2111 along the second direction Y. Please refer to Figure 8 The embodiments include the above-mentioned possibilities.

[0099] According to the above technical solution, the heat exchange flow channel 21a is arranged to be reciprocally bent along the second direction Y and the third direction Z by a plurality of flow channel segments 211a in series communication, so that the heat exchange flow channel 21a can extend and arrange at each local position in the heat exchange wall 2111, ensuring the overall uniform heat exchange between the heat exchange liquid in the heat exchange flow channel 21a and the heat exchange wall 2111.

[0100] Please refer to Figure 2 and Figure 8 In some embodiments, the box body 1 includes a box main body 11 and a box cover 12 in the third direction Z. In the third direction Z, the liquid inlet pipe 212a is arranged closer to the box cover 12 than the liquid outlet pipe 212b. The first direction X intersects with the third direction Z.

[0101] It should be noted that the specific structure of the box main body 11 and the box cover 12 has been explained in the above-mentioned embodiments, and this embodiment will not be repeated. After the battery device 100 is installed on the electric equipment, the position of the box cover 12 in the box body 1 is usually close to the cab of the electric equipment, that is, at the high position of the battery device 100. In the third direction Z, the liquid inlet pipe 212a is arranged closer to the box cover 12 than the liquid outlet pipe 212b, which means that the liquid inlet pipe 212a is arranged at a higher position than the liquid outlet pipe 212b.

[0102] According to the technical solution, the liquid inlet pipe 212a is arranged closer to the box cover 12 than the liquid outlet pipe 212b in the third direction Z, so that the liquid inlet pipe 212a is arranged higher than the liquid outlet pipe 212b. During the process of the heat exchange liquid passing through the heat exchange flow channel 21a from the liquid inlet pipe 212a to the liquid outlet pipe 212b, the heat exchange liquid is affected by gravity, and the flow resistance of the heat exchange liquid is small. The noise generated by the flow of the heat exchange liquid in the heat exchange flow channel 21a is also reduced.

[0103] Please refer to Figure 4 and Figure 5 In some embodiments, a side wall of the shell 21 in the first direction X is the heat exchange wall 2111.

[0104] It should be noted that since the plurality of battery monomers 2 are stacked in the first direction X, the side wall of the shell 21 in the first direction X not only needs to be in contact with the electrode assembly arranged therein, but also needs to be in abutting contact with the adjacent battery monomer 2.

[0105] According to the technical solution, the side wall of the shell 21 in the first direction X is arranged as the heat exchange wall 2111. During the heat exchange with the electrode assembly in the shell 21, the heat exchange wall 2111 can also exchange heat with the electrode assembly in the adjacent battery monomer 2. This makes full use of the two heat exchange surfaces of the heat exchange wall 2111, reduces the arrangement density of the heat exchange wall 2111 in the battery device 100, and reduces the production cost of the battery device 100.

[0106] Please refer to Figure 3 and Figure 4 In some embodiments, the second battery monomer 2b is arranged between the adjacent two first battery monomers 2a in a row of battery monomers 2, and the second battery monomer 2b is in abutting contact with at least one heat exchange wall 2111 of the first battery monomer 2a.

[0107] It should be noted that if the first battery monomer 2a is understood as a battery monomer 2 with a more special structure among the plurality of battery monomers 2, then the second battery monomer 2b can be understood as a battery monomer 2 with a more common structure among the plurality of battery monomers 2, and the main difference between the second battery monomer 2b and the first battery monomer 2a is that there is no heat exchange wall 2111 in the shell 21 of the second battery monomer 2b, of course, the second battery monomer 2b can also have improvements and innovations in other positions; The number of second battery monomers 2b can be one, and only the second battery monomer 2b is arranged between the specific two adjacent first battery monomers 2a, and the number of second battery monomers 2b can also be multiple, and the second battery monomer 2b is arranged between any two adjacent first battery monomers 2a; "The second battery monomer 2b at least abuts the heat exchange wall 2111 of one of the first battery monomers 2a" means that the second battery monomer 2b can only abut the heat exchange wall 2111 of one of the first battery monomers 2a through one side thereof along the first direction X, or can abut the heat exchange wall 2111 of two first battery monomers 2a through both sides thereof along the first direction X.

[0108] According to the above technical solution, since the heat exchange wall 2111 is located on one side of the shell 21 along the first direction X, this allows the first battery monomer 2a to contact the adjacent battery monomer 2 through the heat exchange wall 2111. Based on this, the second battery monomer 2b is arranged between the two adjacent first battery monomers 2a, and the second battery monomer 2b can be heat exchanged through the heat exchange wall 2111 of the first battery monomer 2a. On the premise of meeting the overall thermal management requirements of the battery device 100, the number of first battery monomers 2a can be reduced, thereby controlling the production cost of the battery device 100.

[0109] Please refer to Figure 3 and Figure 4 In some embodiments, the second battery monomer 2b abuts the heat exchange wall 2111 of the corresponding first battery monomer 2a to form a heat exchange battery group, and the heat exchange battery group is arranged in multiple groups in the first direction X.

[0110] It should be noted that the heat exchange battery group refers to a battery group in which a first battery monomer 2a and a second battery monomer 2b contact through a heat exchange wall 2111.

[0111] According to the above technical solution, arranging the heat exchange battery group in multiple groups in the first direction X can reduce the number of first battery monomers 2a to the greatest extent, thereby controlling the production cost of the battery device 100 at a low level.

[0112] Please refer to Figure 4In some embodiments, in a heat exchange battery pack, a heat insulation pad 3 is arranged on the side of the first battery cell 2a away from the second battery cell 2b and / or on the side of the second battery cell 2b away from the first battery cell 2a.

[0113] It should be noted that, in a heat exchange battery pack, heat exchange can be performed on two electrode assemblies (one is an electrode assembly arranged in the shell 21 corresponding to the heat exchange wall 2111, and the other is an electrode assembly arranged in the shell 21 abutting the heat exchange wall 2111) through the heat exchange wall 2111, and the heat of the two electrode assemblies can be uniformly associated and managed through the heat exchange wall 2111. Generally, the battery device 100 should reduce the heat exchange between the battery cells 2 that are not associated. In a heat exchange battery pack, the side of the first battery cell 2a away from the second battery cell 2b and the side of the second battery cell 2b away from the first battery cell 2a respectively belong to the two sides of the heat exchange battery pack along the first direction X. The heat insulation pad 3 includes heat insulation foam or heat insulation rubber, which is not limited in the present application. Wherein, the "heat insulation pad 3 arranged on the side of the first battery cell 2a away from the second battery cell 2b" and the "heat insulation pad 3 arranged on the side of the second battery cell 2b away from the first battery cell 2a" can be set alternatively or simultaneously. Obviously, the effect of simultaneous setting is better.

[0114] According to the above technical solution, by arranging the heat insulation pad 3 on the side of the first battery cell 2a away from the second battery cell 2b and on the side of the second battery cell 2b away from the first battery cell 2a, the heat exchange battery pack and other battery cells 2 adjacent to it along the first direction X (which can be a single first battery cell 2a, a single second battery cell 2b, or a battery cell 2 in the entire heat exchange battery pack) can be heat insulated, reducing the thermal influence between them.

[0115] The present application also proposes a power consuming device, which comprises a battery device 100 for providing electric energy. The specific structure of the battery device 100 is referred to the above-mentioned embodiments. Since the power consuming device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, the battery device 100 is used to provide electric energy for the power consuming device, which includes but is not limited to new energy vehicles such as pure electric vehicles, hybrid electric vehicles and extended range electric vehicles, and can also include electric unmanned aerial vehicles, electric passenger aircraft and other aircraft.

[0116] The application provides a battery device 100, which comprises a box body 1 and a plurality of battery monomers 2 arranged in the box body 1, the plurality of battery monomers 2 are arranged in a first direction X, the plurality of battery monomers 2 comprise a plurality of first battery monomers 2a, the first battery monomer 2a comprises a shell 21 and an electrode assembly arranged in the shell 21, the shell 21 comprises a shell main body 211, a first end cover 213, a second end cover 214 and two current collecting parts 212, a side wall of the shell main body 211 in the first direction X is arranged as a heat exchange wall 2111, the heat exchange wall 2111 is provided with a heat exchange flow channel 21a, the first end cover 213 and the second end cover 214 are arranged at two ends of the shell main body 211 in a second direction Y, the heat exchange flow channel 21a is arranged through the heat exchange wall 2111 in the second direction Y, the two current collecting parts 212 are arranged on the heat exchange wall 2111 and correspond to two side openings of the heat exchange flow channel 21a respectively, the two current collecting parts 212 are respectively provided with an inlet liquid pipe 212a and an outlet liquid pipe 212b, the inlet liquid pipe 212a and the outlet liquid pipe 212b respectively extend towards the first direction X and are respectively connected to an inlet end and an outlet end of the heat exchange flow channel 21a, the inlet liquid pipe 212a of two shell 21s is connected to each other in the first direction X, and the outlet liquid pipe 212b of two shell 21s is connected to each other in the first direction X.

[0117] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and they should be covered in the scope of the claims and the description of the application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; as well as, Multiple battery cells are disposed in the housing, and the multiple battery cells are stacked in a first direction to form at least one column, wherein at least two of the battery cells in the column are configured as first battery cells. The first battery cell includes a housing and an electrode assembly disposed within the housing. One side wall of the housing is configured as a heat exchange wall, and a heat exchange channel is disposed within the heat exchange wall. The housing has an inlet pipe and an outlet pipe facing a first direction. The inlet pipe is connected to the inlet end of the heat exchange channel, and the outlet pipe is connected to the outlet end of the heat exchange channel. The inlet pipes of the two housings are connected to each other in the first direction, and the outlet pipes of the two housings are connected to each other in the first direction.

2. The battery device as claimed in claim 1, characterized in that, The housing includes: The shell body has the heat exchange wall; and, Two flow collection sections are disposed on the heat exchange wall and located at the side end of the heat exchange wall along the second direction. The liquid inlet pipe and the liquid outlet pipe are respectively formed in the two flow collection sections. Wherein, the first direction intersects with the second direction.

3. The battery device as claimed in claim 2, characterized in that, The housing further includes a first end cap and a second end cap, which are disposed at both ends of the housing body along the second direction. The electrode assembly is disposed within the receiving cavity formed by the housing body, the first end cap, and the second end cap. The first end cap and / or the second end cap are provided with electrode terminals, which are electrically connected to the electrode assembly. The heat exchange channel is provided to penetrate the heat exchange wall along the second direction; The two flow collection sections are respectively provided with openings on both sides of the heat exchange channel.

4. The battery device as claimed in claim 2, characterized in that, The heat exchange wall extends along the second direction; The two flow collection sections are respectively disposed on both sides of the heat exchange wall along the second direction.

5. The battery device as claimed in claim 2, characterized in that, The inlet pipe and / or the outlet pipe have a connector at their ends, which extends along the first direction.

6. The battery device according to any one of claims 1 to 5, characterized in that, The heat exchange channel includes multiple channel segments extending along the second direction and arranged along the third direction, and the multiple channel segments are connected in series from end to end; The first direction, the second direction, and the third direction intersect each other.

7. The battery device according to any one of claims 1 to 5, characterized in that, The enclosure includes a main body and a lid facing a third direction; In the third direction, the inlet pipe is positioned closer to the tank cover than the outlet pipe; Wherein, the first direction intersects with the third direction.

8. The battery device according to any one of claims 1 to 5, characterized in that, The side wall of the housing in the first direction is the heat exchange wall.

9. The battery device as claimed in claim 8, characterized in that, The battery cells in a row include a second battery cell located between two adjacent first battery cells, the second battery cell abutting against at least one of the heat exchange walls of the first battery cell.

10. The battery device as claimed in claim 9, characterized in that, The second battery cell abuts against the heat exchange wall of the corresponding first battery cell to form a heat exchange battery pack, and multiple heat exchange battery packs are arranged in the first direction.

11. The battery device as claimed in claim 10, characterized in that, In one of the heat exchange battery packs, a heat insulation pad is provided on the side of the first battery cell facing away from the second battery cell, and / or on the side of the second battery cell facing away from the first battery cell.

12. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 11, the battery device being used to provide electrical energy.

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