Battery device, electric device and energy storage device

Abstract

The application provides a battery device, an electric device and an energy storage device, and belongs to the battery field. The battery device comprises a box body, a heat exchange assembly and a plurality of battery monomers accommodated in the box body. The heat exchange assembly comprises a plurality of heat exchange units arranged at intervals along a first direction. The heat exchange unit comprises a current collector and two heat exchange pieces. The two heat exchange pieces are located on both sides of the current collector along a second direction. The current collector comprises liquid inlet pipes and liquid outlet pipes arranged at intervals along a third direction and communicating with the heat exchange pieces. The liquid inlet pipes of the plurality of heat exchange units are sequentially connected along the first direction and form a liquid inlet flow channel. The liquid outlet pipes of the plurality of heat exchange units are sequentially connected along the first direction and form a liquid outlet flow channel. In the surface of the bottom plate of the box body, the orthographic projection of the liquid inlet flow channel at least partially overlaps the orthographic projection of the liquid outlet flow channel. In this way, the space along the height direction of the box body is fully utilized to arrange the liquid inlet flow channel and the liquid outlet flow channel, the space utilization rate in the box body is improved, and the volume energy density is improved.

Description

TECHNICAL FIELD

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

[0002] Energy saving and emission reduction is the key to the sustainable development of society. The rechargeable battery has the characteristics of storing energy or releasing energy according to the needs, and is widely used in various electric equipment or energy storage systems, and is an important part of promoting energy transformation and sustainable development. For the new energy industry, battery technology is an important factor for its development.

[0003] The volumetric energy density of the battery device is closely related to the endurance of the vehicle. Therefore, in order to meet the requirements of users on the endurance of the vehicle, how to improve the volumetric energy density of the battery device is a problem worth paying attention to. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device, an electric equipment and an energy storage device, so as to improve the volumetric energy density.

[0005] Embodiments of the first aspect of the present application provide a battery device, comprising: a box body, and a heat exchange assembly and a plurality of battery monomers contained in the box body, the heat exchange assembly comprising a plurality of heat exchange units arranged at intervals along a first direction, the heat exchange unit comprising a current collector and two heat exchange pieces, the two heat exchange pieces being a first heat exchange piece and a second heat exchange piece respectively, the first heat exchange piece and the second heat exchange piece being connected to the two sides of the current collector along a second direction respectively, the current collector comprising a liquid inlet pipe and a liquid outlet pipe arranged at intervals along a third direction, the liquid inlet pipes of the plurality of heat exchange units being connected in sequence along the first direction and forming a liquid inlet flow channel, the liquid outlet pipes of the plurality of heat exchange units being connected in sequence along the first direction and forming a liquid outlet flow channel, and the orthographic projection of the liquid inlet flow channel on the surface of the bottom plate of the box body and the orthographic projection of the liquid outlet flow channel on the surface of the bottom plate at least partially overlap, the heat exchange piece forming a heat exchange flow channel inside, the inflow end of the heat exchange flow channel being in communication with the liquid inlet flow channel, and the outflow end of the heat exchange flow channel being in communication with the liquid outlet flow channel; the first direction, the second direction and the third direction are perpendicular to each other; and each heat exchange piece exchanges heat with at least one battery monomer.

[0006] In the technical solution of the embodiments of the present application, the space of the box body along the height direction of the box body is fully utilized to arrange the liquid inlet flow channel and the liquid outlet flow channel, which reduces the occupation of the liquid inlet flow channel and the liquid outlet flow channel along the second direction of the box body. This can improve the space utilization rate in the box body, and thus is conducive to improving the volumetric energy density.

[0007] In some embodiments, the center axis of the liquid inlet flow channel and the center axis of the liquid outlet flow channel are located on the same plane, and the plane is perpendicular to the second direction.

[0008] The liquid inlet flow channel and the liquid outlet flow channel further reduce the space occupied by the box along the second direction in the embodiment, which is beneficial to further improve the space utilization in the box and the volume energy density of the battery device.

[0009] In some embodiments, the battery cell includes two first surfaces arranged opposite to each other along the first direction and two second surfaces arranged opposite to each other along the second direction, the area of the first surface is larger than the area of the second surface, and each heat exchange member includes two surfaces arranged opposite to each other along the first direction and parallel to the first surface.

[0010] In some embodiments, along the second direction, the current collectors of the plurality of heat exchange units are located in the middle part of the heat exchange assembly.

[0011] In some embodiments, the battery device further includes a bus assembly arranged in the box; the bottom plate is provided with a reinforcing rib; the bus assembly, the current collector, and the reinforcing rib are sequentially and overlapped arranged along the third direction; the current collector includes a body, the liquid inlet pipe and the liquid outlet pipe are arranged on the body, the heat exchange member is connected to the body, and the body has a first side surface and a second side surface opposite to each other along the second direction.

[0012] In some embodiments, the reinforcing rib extends along the first direction from the inlet end of the liquid inlet flow channel to the outlet end of the liquid inlet flow channel, the reinforcing rib is arranged on the side of the heat exchange unit facing the bottom plate, and the reinforcing rib is located between the first side surface and the second side surface. In the embodiment, the structural rigidity and the deformation resistance of the box can be improved by introducing the reinforcing rib.

[0013] In some embodiments, each body is provided with a first avoiding gap at the end facing the bottom plate, and part of the reinforcing rib is arranged in the first avoiding gap. In the embodiment, the reinforcing rib can reduce the occupation of the space in the box along the third direction or can not additionally occupy the space in the box along the third direction, thereby improving the space utilization in the box.

[0014] In some embodiments, the bus assembly is arranged on the side of the heat exchange unit away from the bottom plate, the bus assembly extends along the first direction from one side of the heat exchange assembly to the other side of the heat exchange assembly, and the bus assembly is located between the first side surface and the second side surface. In the embodiment, the bus assembly is arranged to enable the current to be led out.

[0015] In some embodiments, each body is provided with a second avoiding gap at the end away from the bottom plate, and part of the bus assembly is arranged in the second avoiding gap. In the embodiment, the bus assembly is introduced, and the total size of the bus assembly and the heat exchange assembly in the third direction is compressed, so that the height of the box can be smaller.

[0016] In some embodiments, the heat exchange units, the reinforcing ribs, and the current collecting assembly are symmetrically arranged about a center plane, the center plane being a plane passing through the center of the box and being perpendicular to the second direction. In this embodiment, the heat exchange units, the current collecting assembly, and the reinforcing ribs are all located in the middle of the box along the second direction, which is conducive to making the temperature adjustment effects of the first heat exchange member and the second heat exchange member equivalent, and is conducive to further improving the structural rigidity and anti-deformation capability of the box.

[0017] In some embodiments, two partitions are arranged in the box, and the two partitions divide the internal space of the box into a first accommodating chamber, a second accommodating chamber, and a third accommodating chamber arranged in sequence along the first direction. The plurality of battery monomers and the heat exchange assembly are arranged in the second accommodating chamber. An end of the reinforcing rib along the first direction is fixedly connected with the partition between the second accommodating chamber and the third accommodating chamber. This embodiment improves the structural stability of the partition, so that the partition can reliably limit the expansion of the plurality of battery monomers.

[0018] In some embodiments, the battery device further comprises an input pipe and an output pipe arranged in the first accommodating chamber and extending along the first direction. An end of the input pipe is in communication with the liquid inlet flow channel, and an end of the output pipe is in communication with the liquid outlet flow channel. The other end of the input pipe is used to communicate with the liquid supply flow path located outside the box.

[0019] In this embodiment, the heat exchange medium flows linearly in the input pipe and the output pipe, and the flow path is short, so the pressure drop is small, and the flow resistance is small.

[0020] In some embodiments, the battery device further comprises two limiting members located on the side of the current collecting assembly away from the bottom plate, and the two limiting members correspond to the two partitions one by one. Two ends of each limiting member are arranged across the two sides of the current collecting assembly along the second direction, and the two ends of each limiting member are fixedly connected with the corresponding partition to limit the movement of the current collecting assembly away from the bottom plate. This embodiment improves the installation reliability of the current collecting assembly to reduce the risk of short circuit caused by the displacement of the current collecting assembly contacting other electrical components.

[0021] The second aspect of the embodiments of the present application provides a power utilization equipment, which comprises the battery device in the above embodiments, and the battery device is used to provide electric energy.

[0022] The third aspect of the embodiments of the present application provides an energy storage device, which comprises the battery device in the above embodiments, and the battery device can store electric energy.

[0023] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0024] In the drawings, like reference numerals refer to like elements throughout the various figures. The drawings are not necessarily to scale, and the emphasis is on the functional relationships between elements. It should be understood that these drawings are merely schematic and are not intended to portray true dimensions of the application.

[0025] Figure 1 Structure diagram of a vehicle according to some embodiments of the application;

[0026] Figure 2 Structure diagram of a battery device according to some embodiments of the application;

[0027] Figure 3 Structure diagram of a battery device according to some embodiments of the application; Figure 2 Structure diagram of a battery device according to some embodiments of the application;

[0028] Figure 4 Structure diagram of a battery device according to some embodiments of the application; Figure 2 Structure diagram of a battery device according to some embodiments of the application;

[0029] Figure 5 Structure diagram of a battery device according to some embodiments of the application; Figure 4 Structure diagram of a battery device according to some embodiments of the application;

[0030] Figure 6 Structure diagram of a battery device according to some embodiments of the application; Figure 4 Structure diagram of a battery device according to some embodiments of the application;

[0031] Figure 7 Structure diagram of a battery device according to some embodiments of the application; Figure 6 Structure diagram of a battery device according to some embodiments of the application;

[0032] Figure 8 Structure diagram of a battery device according to some embodiments of the application; Figure 2 Structure diagram of a battery device according to some embodiments of the application;

[0033] Figure 9 Structure diagram of a battery device according to some embodiments of the application; Figure 8 Structure diagram of a battery device according to some embodiments of the application;

[0034] Figure 10 Structure diagram of a battery device according to some embodiments of the application; Figure 2 Structure diagram of a battery device according to some embodiments of the application;

[0035] Figure 11 Structure diagram of a battery device according to some embodiments of the application; Figure 10 Structure diagram of a battery device according to some embodiments of the application.

[0036] Reference numeral explanation:

[0037] Vehicle 1000;

[0038] Battery device 100, controller 200, motor 300;

[0039] Heat exchange assembly 10, heat exchange unit 11, collector 111, body 1111, liquid inlet pipe 1112, liquid outlet pipe 1113, first hole 1114, second hole 1115, first avoiding gap 1116, second avoiding gap 1117, heat exchange piece 112, first heat exchange piece 112a, second heat exchange piece 112b, heat exchange flow channel 1121, liquid inlet flow channel 12, liquid outlet flow channel 13, end cover 14;

[0040] Box body 20, bottom plate 21, reinforcing rib 211, first wall 22, second wall 23, third wall 24, fourth wall 25, partition plate 26, first sub-partition plate 261, second sub-partition plate 262, first containing bin 27, second containing bin 28, third containing bin 29;

[0041] Battery monomer 30, first face 31, second face 32, current collector assembly 40, first current collector 41, second current collector 42, limiting piece 50, input pipe 60, output pipe 70;

[0042] First direction X, second direction Y, third direction Z. DETAILED DESCRIPTION

[0043] The embodiments of the technical scheme of the present application will be described in detail below with reference to the 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.

[0044] 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 terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof in the specification and in the claims and the above description of the drawings are intended to cover the inclusion not the exclusion of one or more elements.

[0045] 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.

[0046] In this paper, the "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0047] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are an "or" relationship.

[0048] 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).

[0049] In the description of the embodiments of the present application, 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 indicate the orientation or positional relationship based on the orientation or positional relationship 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.

[0050] 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, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements.

[0051] The term "parallel" in the present application not only includes the case of absolute parallel, but also includes the case of approximate parallel which is generally recognized in engineering; at the same time, "perpendicular" also not only includes the case of absolute perpendicular, but also includes the case of approximate perpendicular which is generally recognized in engineering. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific situation.

[0052] In some existing battery devices, a plurality of cuboid battery monomers are stacked in the thickness direction of the battery monomers to form a battery monomer assembly in a box body, and the large faces of the battery monomers are arranged opposite to each other in the stacking direction of the battery monomers. The large face refers to the surface with the largest area on the battery monomer. In order to make the battery monomers work in a suitable temperature range, a heat exchange plate is arranged between two adjacent battery monomers, the heat exchange plate is in contact with the large face of the battery monomer, and the heat exchange plate has a channel for the flow of heat exchange medium to adjust the temperature of the battery monomer.

[0053] In order to enable the heat exchange medium to flow into the heat exchange plate to exchange heat with the battery monomer and flow out after heat exchange, the heat exchange plate is formed with an inlet flow channel and an outlet flow channel on both sides along the length direction of the battery monomer, the channels in the heat exchange plate are connected to the inlet flow channel and the outlet flow channel, the inlet flow channel is used for inputting the heat exchange medium, and the outlet flow channel is used for leading out the heat exchange medium. The components for forming the inlet flow channel and the outlet flow channel are located between the side wall of the battery monomer assembly and the box body.

[0054] It can be seen that in such a battery device, the inlet flow channel and the outlet flow channel are arranged at intervals along the length direction of the battery monomer, and each occupies a space in the box along the length direction of the battery monomer, so the volumetric energy density of the battery device is relatively low.

[0055] Based on the above considerations, in order to improve the volumetric energy density, the application designs a battery device, by arranging the inlet flow channel and the outlet flow channel in the height direction of the box, and in the surface of the bottom plate of the box, the orthographic projection of the inlet flow channel at least partially overlaps the orthographic projection of the outlet flow channel, in other words, the inlet flow channel and the outlet flow channel are arranged in the height direction of the box. In such a battery device, since the inlet flow channel and the outlet flow channel do not separately occupy the space in the box along the length direction of the battery monomer, the space utilization rate in the box is improved, which in turn has a positive effect on improving the volumetric energy density of the battery device.

[0056] The battery device related in the embodiments of the application can be used in, but is not limited to, an electric device or an energy storage device for a vehicle, a ship or an aircraft.

[0057] The battery device used as an energy storage device of a power supply system in the embodiments of the application can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system or a temporary power supply system, etc. The energy storage device can store electric energy as needed and output electric energy at an appropriate time. For example, the energy storage device can store electric energy at a low electricity consumption valley, and provide electric energy for related users or electric devices at a high electricity consumption peak. The energy storage device provided in the embodiments of the application can be any power system that needs to use an energy storage device.

[0058] In some embodiments, the energy storage device is an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack or a portable energy storage system.

[0059] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters (Battery Cluster), and the battery clusters are accommodated in the cabinet body. The battery cluster can include a plurality of battery devices, and the plurality of battery devices are connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0060] In the embodiments of the present application, the electrical devices that utilize battery devices as power sources may include, but are not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery-powered vehicles, electric vehicles, ships, spacecraft, and the like. Electric toys may include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, and spacecraft may include airplanes, rockets, space shuttles, and spacecraft. For the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0061] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000. The battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may serve as an operating power source for 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 device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0062] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0063] Figure 2 1 shows a schematic structural diagram of a battery device 100 according to an embodiment of the present application. Figure 3 for Figure 2 The exploded structural diagram of the battery device 100 is shown in FIG. Figure 4 for Figure 2 The schematic structural diagram of the heat exchange component 10 of the battery device 100 is shown. Figure 5 for Figure 4 The structural diagram of the heat exchange unit in the heat exchange assembly shown in FIG. Figure 6 for Figure 4 The cross-sectional view of the heat exchange unit shown in FIG. Figure 7 for Figure 6 A local enlarged schematic diagram of the middle part. Figure 2 and Figure 3 As shown, the battery apparatus 100 mentioned in the embodiment of the present application includes: a box body 20 and a heat exchange assembly 10 accommodated in the box body 20. The heat exchange assembly 10 includes a plurality of heat exchange units 11 spaced apart along a first direction X, as shown in FIG.Figure 3 and Figure 4 , showing 32 heat exchange units 11. Figure 5 As shown, the heat exchange unit 11 includes a current collector 111 and two heat exchange elements (a single "heat exchange element 112" or multiple "heat exchange elements 112" are collectively referred to as "heat exchange elements 112"). The two heat exchange elements 112 are respectively a first heat exchange element 112a and a second heat exchange element 112b. The first heat exchange element 112a and the second heat exchange element 112b are arranged at intervals along the second direction Y and are respectively connected to the two sides of the current collector 111 along the second direction Y. The current collector 111 includes a liquid inlet pipe 1112 and a liquid outlet pipe 1113 arranged at intervals along the third direction Z. The liquid inlet pipes 1112 of the multiple heat exchange units 11 are sequentially connected along the first direction X to form a liquid inlet channel 12. The liquid outlet pipes 1113 of the multiple heat exchange units 11 are sequentially connected along the first direction X to form a liquid outlet channel 13. The orthographic projection of the liquid inlet channel 12 on the surface of the bottom plate 21 of the box body 20 and the orthographic projection of the liquid outlet channel 13 on the surface of the bottom plate 21 at least partially overlap. As shown Figure 6 and Figure 7 As shown, a heat exchange channel 1121 is formed within the heat exchange element 112. The inlet end of the heat exchange channel 1121 communicates with the liquid inlet channel 12, and the outlet end of the heat exchange channel 1121 communicates with the liquid outlet channel 13. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The battery device 100 also includes a plurality of battery cells 30, and each heat exchange element 112 exchanges heat with at least one battery cell 30.

[0064] The housing 20 may be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as rectangular parallelepiped, cylinder, or sphere. The housing 20 may be made of an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0065] As an example, the housing 20 may include a first housing and a second housing. The first and second housings engage to form an enclosed space within the housing 20 for accommodating the battery cells 30. Enclosed here means covered or closed, and can be either unsealed or sealed to prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells 30. The first housing (not shown) may be a top cover or a bottom plate 21.

[0066] As an example, the box body 20 may include a top cover, a frame, and a bottom plate 21. The top cover and the bottom plate 21 are respectively connected to the frame, so that a closed space is formed inside the box body 20 to accommodate the battery cells 30.

[0067] In some embodiments, the case 20 can be part of a chassis structure of the vehicle 1000. For example, portions of the case 20 can become at least part of a floor of the vehicle 1000, or portions of the case 20 can become at least part of cross members and longitudinal members of the vehicle 1000.

[0068] The battery cell 30 is used to provide voltage and capacity. A plurality of battery cells 30 can be connected in series, in parallel, or in a mixed connection through a busbar component. As an example, the battery cell 30 can be housed in the case 20 by being directly fixed to the case 20. The battery cell 30 can be a secondary battery, which refers to a battery cell 30 that can be used continuously by activating the active material through charging after the battery cell 30 is discharged. The battery cell 30 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and embodiments of the present application are not limited thereto. As an example, the battery cell 30 is not limited to being a prismatic battery cell as shown, but can be a cylindrical battery cell, a blade-shaped battery cell, or other shaped battery cell 30, without particular limitation. Figure 2 As an example, the battery cell 30 is not limited to being a prismatic battery cell as shown, but can be a cylindrical battery cell, a blade-shaped battery cell, or other shaped battery cell 30, without particular limitation.

[0069] The heat exchange assembly 10 refers to an assembly having a heat transfer and exchange function. The liquid inlet pipe 1112 and the liquid outlet pipe 1113 are both used for the flow of the heat exchange medium, wherein the extension direction of the liquid inlet pipe 1112 and the extension direction of the liquid outlet pipe 1113 can be parallel to the first direction X or can form an angle with the first direction X. All liquid inlet pipes 1112 can be coaxially arranged to connect to form a liquid inlet flow channel 12, and all liquid outlet pipes 1113 can be coaxially arranged to connect to form a liquid outlet flow channel 13.

[0070] Wherein, taking the battery cell 30 as an example in the shape of a rectangular parallelepiped, the first direction X is parallel to the thickness direction of the battery cell 30, the second direction Y is parallel to the length direction of the battery cell 30, and the third direction Z is parallel to the height direction of the battery cell 30. In the example shown in Figure 7 , the liquid inlet pipes 1112 and the liquid outlet pipes 1113 arranged at intervals along the third direction Z are distributed up and down. As an example, as shown in Figure 5 and Figure 7 , the liquid inlet pipe 1112 can be located above the liquid outlet pipe 1113, and correspondingly, the liquid inlet flow channel 12 is located above the liquid outlet flow channel 13. As an example, the liquid inlet pipe 1112 can be located below the liquid outlet pipe 1113, and correspondingly, the liquid inlet flow channel 12 is located below the liquid outlet flow channel 13.

[0071] The heat exchange member 112 is a hollow structure. The heat exchange flow channel 1121 is configured such that the heat exchange medium needs to make one or N times of turn around to flow from the inflow end to the outflow end, N is an odd number greater than or equal to 3, so that the inflow end and the outflow end can be located at the same end of the heat exchange member 112 along the second direction Y. As an example, as shown inFigure 6 As shown, the heat exchange member 112 is provided with two flow channels arranged in sequence along the third direction Z, the flow channels extend along the second direction Y, and the two flow channels are connected in sequence to form a heat exchange flow channel 1121, and the flow directions of the heat exchange medium in the two flow channels are opposite. Of course, in other embodiments, the number of flow channels in the heat exchange member 112 can be N+1, and the flow directions of the heat exchange medium in any two adjacent flow channels are opposite.

[0072] Each heat exchange member 112 can exchange heat with one battery cell 30, or can exchange heat with multiple battery cells 30 arranged in sequence along the second direction Y, such as Figure 2 and Figure 3 three battery cells 30 are shown. Of course, in other embodiments, each heat exchange member 112 can also exchange heat with two, four, five or more battery cells 30.

[0073] The heat exchange mode between the heat exchange member 112 and the battery cell 30 can be contact heat exchange, for example, at least one surface of each heat exchange member 112 is in contact with the battery cell 30. Alternatively, at least one surface of each heat exchange member 112 is provided with a heat conducting member (for example, heat conducting glue) between the heat conducting member and the battery cell 30, and the heat conducting member is used to transfer heat. As an example, each heat exchange member 112 is provided with a battery cell 30 on both sides along the first direction X. As an example, when the number of heat exchange units 11 is greater than or equal to 3, the heat exchange member 112 of the heat exchange unit 11 located in the middle of any three adjacent heat exchange units 11 is provided with a battery cell 30 on both sides along the first direction X, the box body 20 has a first wall 22 and a second wall 23 arranged opposite along the first direction X, and the box body 20 has a third wall 24 and a fourth wall 25 arranged opposite along the second direction Y. The heat exchange member 112 of the heat exchange unit 11 closest to the first wall 22 among all the heat exchange units 11 is provided with a battery cell 30 on the side facing the other heat exchange units 11 and is not provided with a battery cell 30 on the side facing away from the other heat exchange units 11, and the heat exchange member 112 of the heat exchange unit 11 closest to the second wall 23 among all the heat exchange units 11 is provided with a battery cell 30 on the side facing the other heat exchange units 11 and is not provided with a battery cell 30 on the side facing away from the other heat exchange units 11.

[0074] The first heat exchange member 112a and the second heat exchange member 112b extend along the second direction Y. The extension lengths of the first heat exchange member 112a and the second heat exchange member 112b can be the same, and both exchange heat with the same number of battery cells 30, such as Figure 2 and Figure 3 As shown, the first heat exchange member 112a and the second heat exchange member 112b both exchange heat with three battery cells 30. Of course, in other embodiments of the present application, the extension lengths of the first heat exchange member 112a and the second heat exchange member 112b can also be different, and both can exchange heat with different numbers of battery cells 30.

[0075] It can be understood that the maximum dimension of the space occupied by the inlet flow channel 12 and the outlet flow channel 13 in the second direction Y in the box 20 is a first dimension, the maximum dimension of the inlet flow channel in the second direction Y is a second dimension, and the maximum dimension of the outlet flow channel in the second direction Y is a third dimension, and the first dimension is less than the sum of the second dimension and the third dimension.

[0076] In the embodiment, the inlet flow channel 12 for inputting the heat exchange medium to the heat exchange member 112 and the outlet flow channel 13 for outputting the heat exchange medium are arranged up and down along the height direction (i.e., the third direction Z) of the battery cell 30, and in the surface of the bottom plate 21, the orthographic projection of the inlet flow channel 12 at least partially overlaps the orthographic projection of the outlet flow channel 13, so that at least part of the inlet flow channel 12 and at least part of the outlet flow channel 13 occupy the same space in the second direction Y in the box 20.

[0077] Therefore, the battery device 100 of the embodiment makes full use of the space of the box 20 along the height direction thereof to arrange the inlet flow channel 12 and the outlet flow channel 13, reduces the occupation of the inlet flow channel 12 and the outlet flow channel 13 along the second direction Y in the space of the box 20, so that the space utilization in the box 20 can be improved, and the volumetric energy density can be improved.

[0078] It can be understood that in the technical solution in which the number of the heat exchange members 112 is one, each current collector 111 can be arranged adjacent to the third wall 24 or the fourth wall 25, and each heat exchange member 112 is used to temperature-regulate an entire row of battery cells 30, and one row of battery cells 30 includes a plurality of battery cells 30 arranged in sequence along the second direction Y. In the embodiment, the current collector 111 is located between the first heat exchange member 112a and the second heat exchange member 112b, the first heat exchange member 112a is used to temperature-regulate a part of the number of battery cells 30 in one row of battery cells 30, and the second heat exchange member 112b is used to temperature-regulate the remaining number of battery cells 30 in one row of battery cells 30. In this way, in the embodiment, the number of battery cells 30 corresponding to the first heat exchange member 112a and the second heat exchange member 112b is small, the temperature difference of the plurality of battery cells 30 arranged in a row is small, and the temperature uniformity is higher, so that the negative influence of the temperature distribution uniformity difference of the battery cells 30 on the internal resistance is small, and the performance of the battery cells 30 can be improved.

[0079] The position relationship between the center axis of the inlet flow channel 12 and the center axis of the outlet flow channel 13 is various. In some embodiments, along the second direction Y, the center axis of the inlet flow channel 12 is offset from the center axis of the outlet flow channel 13 by a first distance, and the first distance is greater than 0 millimeters (mm). That is, along the second direction Y, the center axis of the inlet flow channel 12 can be closer to the heat exchange member 112 than the center axis of the outlet flow channel 13.

[0080] According to some embodiments of the present application, the central axis of the liquid inlet flow channel 12 and the central axis of the liquid outlet flow channel 13 may be located in the same plane, and the plane is perpendicular to the second direction Y. The central axis of the liquid inlet flow channel 12 and the central axis of the liquid outlet flow channel 13 being located in the same plane means that the center of the liquid inlet flow channel 12 and the center of the liquid outlet flow channel 13 are not misaligned in the second direction Y. In this example, the first dimension is equal to the larger of the second dimension and the third dimension.

[0081] Compared with the technical solution in which the central axis of the liquid inlet channel 12 and the central axis of the liquid outlet channel 13 are spaced apart in the second direction Y, without changing the size of the liquid inlet channel 12 along the second direction Y (i.e., the second size) and the size of the liquid outlet channel 13 along the second direction Y (i.e., the third size), in this embodiment, the space occupied by the liquid inlet channel 12 and the liquid outlet channel 13 in the box body 20 along the second direction Y is further reduced, which is conducive to further improving the space utilization inside the box body 20 and the volume energy density of the battery device 100.

[0082] In some embodiments, the cross section perpendicular to the first direction X is the axial cross section, and the axial cross section shape and axial cross section size of the liquid inlet pipe 1112 and the liquid outlet pipe 1113 can be the same. Figure 7 As shown, the axial cross-sections of the liquid inlet pipe 1112 and the liquid outlet pipe 1113 are both circular, and the aperture (i.e., the second dimension) of the liquid inlet pipe 1112 and the aperture (i.e., the third dimension) of the liquid outlet pipe 1113 are equal. In this example, the orthographic projection of the liquid inlet pipe 1112 and the orthographic projection of the liquid outlet pipe 1113 on the surface of the base plate 21 completely overlap, and the first dimension, second dimension, and third dimension are equal. This embodiment reduces the space occupied by the liquid inlet channel 12 and the liquid outlet channel 1113 in the second direction Y of the housing 20 while also making the second dimension and the third dimension equal. Compared to a solution in which the second dimension and the third dimension are unequal, the second dimension and the third dimension in this embodiment are both relatively larger, thereby increasing the flow rate of the heat exchange medium contained in the liquid inlet channel 12 and the liquid outlet channel 13, thereby improving the heat exchange capacity of the heat exchange assembly 10. Of course, in other embodiments of the present application, the axial cross-sectional shape of the liquid inlet pipe 1112 and the liquid outlet pipe 1113 can be any one of a rectangular shape, an elliptical shape, a long strip shape, a waist shape, etc.

[0083] The specific method of achieving the communication between the inlet end of the heat exchange channel 1121 and the liquid inlet channel 12 can be: Figure 7As shown, the current collector 111 is provided with a first channel 1114. One end of the first channel 1114 is connected to the inlet end, and the other end penetrates the wall of the liquid inlet pipe 1112. The heat exchange medium flows from the liquid inlet pipe 1112 into the first channel 1114 and then enters the heat exchange flow channel 1121 through the inlet end. The extension direction of the first channel 1114 can be parallel to the second direction Y or can form an angle with the second direction Y. The number of first channels 1114 is not limited to one, and can also be two, three, or more.

[0084] The specific method of achieving the communication between the outflow end of the heat exchange channel 1121 and the liquid outlet channel 13 can be: Figure 7 The current collector 111 is provided with a second channel 1115, one end of which is connected to the outflow end and the other end of which passes through the wall of the liquid outlet pipe 1113, so that the outflow end is connected to the liquid outlet channel 13. The extension direction and number of the second channel 1115 can be referred to the arrangement of the first channel 1114 and will not be repeated here.

[0085] In some embodiments, an end cap 14 is provided at one end of the heat exchange element 112 facing away from the current collector 111 to prevent the heat exchange medium from flowing out.

[0086] Figure 8 for Figure 2 The partial schematic diagram of the battery device 100 shown in FIG. Figure 9 for Figure 8 The partial schematic diagram of the confluence assembly 40, the heat exchange assembly 10 and the box body 20 in the main viewing direction is shown in FIG. Figure 10 for Figure 2 Schematic diagram of a partial structure of a battery device shown. According to some embodiments of the present application, such as Figures 8 to 10 As shown, the battery device 100 further includes a bus assembly 40 disposed in the box body 20 , a reinforcing rib 211 is provided on the bottom plate 21 , and the bus assembly 40 , the current collector 111 and the reinforcing rib 211 are sequentially overlapped along the third direction Z.

[0087] The busbar assembly 40 is a conductive metal component that connects multiple battery cells 30 and is used to collect and distribute current. It is located on the side of the current collector 111 facing away from the base plate 21. The busbar assembly 40 is a conductive metal component that connects multiple battery cells 30 and is used to collect and distribute current. The busbar assembly 40 can be connected to the high-voltage connector on the housing 20 to electrically connect to other electrical systems of the vehicle 1000 through the high-voltage connector, thereby providing power to the electrical system.

[0088] The reinforcing rib 211 is a component protruding from the surface of the bottom plate 21. The reinforcing rib 211 is located on the side of the current collector 111 facing the bottom plate 21. This embodiment does not impose any special restrictions on the specific structure of the reinforcing rib 211. For example, Figure 9As shown, the reinforcing rib 211 can include a base plate arranged on the bottom plate 21 and a rectangular tube arranged on the surface of the base plate away from the bottom plate 21, and the base plate is provided with a flange at both ends along the second direction Y, and the flange protrudes from the base plate along the third direction Z. In other embodiments, the reinforcing rib 211 can also be a tubular structure or a columnar structure, and the cross-sectional shape of the reinforcing rib 211 perpendicular to the first direction X can be rectangular, circular, oval, triangular, etc. In some embodiments, the reinforcing rib 211 can be an integral structure, which can improve the structural strength of the reinforcing rib 211 without increasing the cost.

[0089] By arranging the reinforcing rib 211, the structural rigidity and deformation resistance of the box body 20 can be improved. By arranging the current collecting assembly 40, the current can be led out. Moreover, compared with the technical solution that the current collecting assembly 40, the current collector 111 and the reinforcing rib 211 are arranged in sequence along the second direction Y, in the embodiment, the space of the box body 20 along the height direction (i.e., the third direction Z) is fully utilized to arrange the current collecting assembly 40, the current collector 111 and the reinforcing rib 211, the current collecting assembly 40, the current collector 111 and the reinforcing rib 211 overlap along the third direction Z, and the two of the current collecting assembly 40, the current collector 111 and the reinforcing rib 211 with the smallest dimension along the second direction Y do not additionally occupy the space along the second direction Y in the box body 20, thereby improving the space utilization rate of the third direction Z in the box body 20.

[0090] Moreover, the current collector 111 specifically further includes a body 1111, the liquid inlet pipe 1112 and the liquid outlet pipe 1113 are arranged on the body 1111, the heat exchange element 112 is connected with the body 1111, and the body 1111 has a first side and a second side opposite along the second direction Y.

[0091] For each heat exchange unit 11, the liquid inlet pipe 1112 and the liquid outlet pipe 1113 are fixedly connected with the body 1111, and the fixed connection can be detachable connection, non-detachable connection or integral connection. For example, the liquid inlet pipe 1112 and the liquid outlet pipe 1113 can be integrally formed with the body 1111 by an integral molding process such as injection molding process or casting process, so that the current collector 111 is formed as an integral structure.

[0092] The first side and the second side have a dimension D along the second direction Y, and D is greater than the outer diameter of the liquid inlet pipe 1112 and the outer diameter of the liquid outlet pipe 1113, that is, the space occupied by the current collector 111 in the box body 20 along the second direction Y is greater than the outer diameter of the liquid inlet pipe 1112 and the outer diameter of the liquid outlet pipe 1113.

[0093] According to some embodiments of the present application, as Figure 8 and Figure 9As shown, the reinforcing rib 211 extends along the first direction X from the inlet end of the liquid inlet channel 12 to the outlet end of the liquid inlet channel 12, and is arranged on the side of the heat exchange unit 11 facing the bottom plate 21. The reinforcing rib 211 is located between the first side and the second side.

[0094] The reinforcing rib 211 being located between the first side and the second side means that, in the surface of the bottom plate 21, the orthographic projection of the reinforcing rib 211 along the two side edges in the second direction Y is located between the orthographic projection of the body 1111 along the two side edges in the second direction Y. The first side is located between the second side and the third wall 24, and the end of the reinforcing rib 211 close to the third wall 24 does not extend beyond the first side and the third wall 24, and the end of the reinforcing rib 211 close to the fourth wall 25 does not extend beyond the second side and the fourth wall 25.

[0095] The embodiment uses the space below the heat exchange unit 11 to arrange the reinforcing rib 211, so that the reinforcing rib 211 does not occupy additional space in the second direction Y in the box 20, so that the battery device 100 maintains a high volumetric energy density. The introduction of the reinforcing rib 211 in the embodiment does not increase the size of the box 20 in the second direction Y.

[0096] According to some embodiments of the present application, as shown in Figure 7 , Figure 8 and Figure 9 , each body 1111 can be provided with a first avoiding gap 1116 at the end facing the bottom plate 21, and part of the reinforcing rib 211 is arranged in the first avoiding gap 1116.

[0097] The first avoiding gap 1116 penetrates through the two opposite surfaces of the body 1111 along the first direction X. The reinforcing rib 211 extends from the inlet end of the liquid inlet channel 12 to the outlet end of the liquid inlet channel 12, and sequentially passes through the first avoiding gap 1116 of each body 1111. Among them, taking the cross section perpendicular to the first direction X as the axial cross section, part of the axial cross section of the reinforcing rib 211 at the first avoiding gap 1116 can be located in the first avoiding gap 1116, or the entire axial cross section of the reinforcing rib 211 at the first avoiding gap 1116 can be located in the first avoiding gap 1116. Optionally, the shape of the first avoiding gap 1116 can be matched with the shape of the part of the reinforcing rib 211 arranged in the first avoiding gap 1116. As an example, part of the reinforcing rib 211 passes through the first avoiding gap 1116. As shown in Figure 9As shown, the reinforcing rib 211 includes a base plate and a rectangular tube body, part of the rectangular tube body is arranged in the first avoiding gap 1116, and the first avoiding gap 1116 is rectangular in the cross section perpendicular to the first direction X. As an example, the reinforcing rib can also be arranged in the first avoiding gap 1116 as a whole, and in this example, the bottom of the body 1111 abuts against the bottom plate 21.

[0098] The embodiment makes part of the reinforcing rib 211 arranged in the first avoiding gap 1116, and uses the space in the cabinet 20 occupied by the heat exchange unit 11 in the third direction Z to accommodate at least part of the reinforcing rib 211, so that the space occupied by the reinforcing rib 211 in the cabinet 20 in the third direction Z can be reduced or the reinforcing rib 211 does not additionally occupy the space in the cabinet 20 in the third direction Z, thereby improving the space utilization in the third direction Z of the cabinet 20. The embodiment can compress the total size of the reinforcing rib 211 and the heat exchange assembly 10 in the third direction Z while introducing the reinforcing rib 211, so that the height of the cabinet 20 can be smaller.

[0099] According to some embodiments of the present application, as shown in Figure 3 and Figure 9 , the current collection assembly 40 is arranged on the side of the heat exchange unit 11 away from the bottom plate 21, and the current collection assembly 40 extends from one side of the heat exchange assembly 10 to the other side of the heat exchange assembly 10 in the first direction X. The current collection assembly is located between the first side and the second side.

[0100] The current collection assembly 40 is located between the first side and the second side, which means that in the surface of the bottom plate 21, the two side edges of the orthographic projection of the current collection assembly 40 in the second direction Y are located between the two side edges of the orthographic projection of the body 1111 in the second direction Y.

[0101] Please continue to refer to Figure 3 and Figure 9 , the current collection assembly 40 can specifically include a first current collection bar 41 and a second current collection bar 42, the first current collection bar 41 and the second current collection bar 42 are arranged in the third direction Z, the first current collection bar 41 is connected to the positive electrode terminal of the battery monomer 30 and the high-voltage connector, and the second current collection bar 42 is connected to the negative electrode terminal of the battery monomer 30 and the high-voltage connector. The second current collection bar 42 can be located on the side of the first current collection bar 41 away from the bottom plate 21. Among them, the number of the first current collection bar 41 and the second current collection bar 42 is not limited to one, but also can be three, four or more.

[0102] The embodiment makes the current collection assembly 40 located between the first side and the second side, so that the current collection assembly 40 does not additionally occupy the space in the cabinet 20 in the second direction Y, so that the battery device 100 can maintain a high volume energy density. In the embodiment, the introduction of the current collection assembly 40 does not increase the size of the cabinet 20 in the second direction Y.

[0103] According to some embodiments of the present application, as shown in Figure 7 , Figure 8 and Figure 9 , each body 1111 is provided with a second avoiding gap 1117 at one end away from the bottom plate 21, and part of the bus assembly 40 is arranged in the second avoiding gap 1117.

[0104] The second avoiding gap 1117 penetrates through two opposite surfaces of the body 1111 along the first direction X. The bus assembly 40 extends from one side of the heat exchange assembly 10 to the other side of the heat exchange assembly 10, and sequentially passes through the second avoiding gap 1117 of each body 1111.

[0105] Taking an axial cross section perpendicular to the first direction X as an example, part of the axial cross section of the bus assembly 40 at the second avoiding gap 1117 can be arranged in the second avoiding gap 1117, or the entire axial cross section of the bus assembly 40 at the second avoiding gap 1117 can be arranged in the second avoiding gap 1117. As an example, as shown in Figure 9 , the first bus bar 41 passes through the second avoiding gap 1117 as a whole, and the second bus bar 42 is not arranged in the second avoiding gap 1117.

[0106] The embodiment makes part of the bus assembly 40 arranged in the second avoiding gap 1117, and uses the space along the third direction Z in the cabinet 20 occupied by the heat exchange unit 11 to accommodate at least part of the bus assembly 40, so that the space occupied by the bus assembly 40 along the third direction Z in the cabinet 20 can be reduced or the bus assembly 40 does not additionally occupy the space along the third direction Z in the cabinet 20, thereby improving the space utilization rate along the third direction Z in the cabinet 20. The embodiment can compress the total size of the bus assembly 40 and the heat exchange assembly 10 along the third direction Z while introducing the bus assembly 40, so that the height of the cabinet 20 can be smaller.

[0107] According to some embodiments of the present application, the battery monomer 30 can include two first surfaces 31 arranged away from each other along the first direction X and two second surfaces 32 arranged away from each other along the second direction Y, and the area of the first surface 31 is larger than the area of the second surface 32. The two surfaces of each heat exchange member 112 arranged away from each other along the first direction X can be parallel to the first surface 31.

[0108] The first surfaces 31 of the plurality of battery monomers 30 arranged in sequence along the first direction X are oppositely arranged, and the second surfaces 32 of the plurality of battery monomers 30 arranged in sequence along the second direction Y are oppositely arranged. It can be understood that the first surface 31 is the largest surface (i.e., the large surface) on the battery monomer.

[0109] In some embodiments, at least one surface of each heat exchange piece 112 is in contact with the first face 31 of the battery cell 30 to achieve large-area heat exchange. As an example, two surfaces of each heat exchange piece 112 are in contact with the first face 31 of the battery cell 30. As an example, when the number of heat exchange units 11 is greater than or equal to 3, two surfaces of the heat exchange piece 112 of the heat exchange unit 11 located in the middle of any three adjacent heat exchange units 11 are in contact with the first face 31 of the battery cell 30, the surface of the heat exchange piece 112 of the heat exchange unit 11 closest to the first wall 22 faces the surface of the heat exchange piece 112 of the other heat exchange unit 11 and is in contact with the first face 31 of the battery cell 30, the surface of the heat exchange piece 112 of the heat exchange unit 11 farthest from the first wall 22 faces away from the surface of the heat exchange piece 112 of the other heat exchange unit 11 and is not in contact with the battery cell 30, the surface of the heat exchange piece 112 of the heat exchange unit 11 closest to the second wall 23 faces the surface of the heat exchange piece 112 of the other heat exchange unit 11 and is in contact with the first face 31 of the battery cell 30, and the surface of the heat exchange piece 112 of the heat exchange unit 11 farthest from the second wall 23 faces away from the surface of the heat exchange piece 112 of the other heat exchange unit 11 and is not in contact with the battery cell 30, that is, two first faces 31 of each battery cell 30 are respectively in contact with the surfaces of one heat exchange piece 112.

[0110] The present embodiment enables the heat exchange piece 112 to exchange heat with the first face 31 of the battery cell 30, and since the area of the first face 31 is greater than that of the second face 32, the heat exchange area is large and the heat exchange effect is better.

[0111] According to some embodiments of the present application, as shown in Figure 5 and Figure 4 , along the second direction Y, the current collectors 111 of the plurality of heat exchange units 11 can be located in the middle of the heat exchange assembly 10. That is, the current collectors 111 are located in the middle of the heat exchange units 11 in the second direction Y, rather than being arranged away from the middle of the heat exchange units 11. In the present example, the two heat exchange pieces 112 located on both sides of the current collector 111 can be symmetrically arranged about the center line of the current collector 111. The present embodiment enables the heat exchange units 11 to uniformly exchange heat with a row of battery cells 30, which is conducive to optimizing the temperature regulation effect and the uniform heating effect.

[0112] The number of heat exchange assemblies 10 is not limited, for example, it can be Figure 3 one as shown. Alternatively, it can also be multiple, and the multiple heat exchange assemblies 10 are sequentially arranged along the second direction Y. Among them, each heat exchange assembly 10 can be symmetrically arranged about the center axis of the liquid inlet flow channel 12.

[0113] According to some embodiments of the present application, when one heat exchange assembly 10 is provided, please refer to Figure 2 and Figure 3 , the heat exchange units 11, the reinforcing ribs 211 and the busbar assembly 40 can be symmetrically arranged about the center face S, which is a plane passing through the center of the box body 20 and perpendicular to the second direction Y.

[0114] The center plane S of the box 20 can be a plane perpendicular to the second direction Y and passing through the geometric center of the box 20, and the heat exchange unit 11 is symmetrically arranged about the center plane S. In the embodiment, the liquid inlet pipe 1112 and the liquid outlet pipe 1113 are also symmetrically arranged about the center plane S, and the liquid inlet pipe 1112 and the liquid outlet pipe 1113 are also located in the middle of the box 20 along the second direction Y, and the structure of the first heat exchange member 112a and the structure of the second heat exchange member 112b are the same.

[0115] The reinforcing rib 211 and the bus assembly 40 can also be symmetrically arranged about the center plane S, and the reinforcing rib 211 and the bus assembly 40 are also located in the middle of the box 20 along the second direction Y.

[0116] Thanks to the symmetric arrangement of the heat exchange unit 11 about the center plane S, the number of battery monomers 30 corresponding to each first heat exchange member 112a and corresponding second heat exchange member 112b is the same, which is beneficial to make the heat uniformity of the first heat exchange member 112a and the second heat exchange member 112b equivalent. The embodiment makes the reinforcing rib 211 located in the middle of the box 20 along the second direction Y, which is beneficial to further improve the structural rigidity and anti-deformation ability of the box 20.

[0117] According to some embodiments of the present application, as shown in Figure 10 The box 20 can also be provided with two partitions (a single "partition 26" or two "partitions 26" are collectively referred to as "partitions 26") inside the box 20, and the two partitions 26 divide the internal space of the box 20 into a first containing bin 27, a second containing bin 28 and a third containing bin 29 arranged in sequence along the first direction X. A plurality of battery monomers 30 and a heat exchange assembly 10 are arranged in the second containing bin 28, and one end of the reinforcing rib 211 along the first direction X is fixedly connected with the partition 26 (i.e. the partition 26 located on the right side in Figure 10 the middle of the second containing bin 28 and the third containing bin 29.

[0118] The two partitions 26 can be oppositely arranged and parallel to each other along the first direction X, and one end of the reinforcing rib 211 along the first direction X is fixedly connected with one of the two partitions 26 (i.e. the partition 26 located on the right side in Figure 10 the middle of the second containing bin 28 and the third containing bin 29. Figure 10 In some embodiments, the other end of the reinforcing rib 211 along the first direction X can be fixedly connected with one of the two partitions 26 (i.e. the partition 26 located on the left side in

[0119] Figure 11 As shown in the battery device, the local schematic view of the bus assembly and the box. As an alternative, in some embodiments, as shown in Figure 10 the local schematic view of the bus assembly and the box. As an alternative, in some embodiments, as shown in Figure 11As shown, one of the two partitions 26 closer to the first accommodating cavity 27 includes a first sub-partition 261 and a second sub-partition 262 spaced apart along the second direction Y, and the other end of the reinforcing rib 211 along the first direction X can be located between the first sub-partition 261 and the second sub-partition 262. The fixed connection of the reinforcing rib 211 and the partition 26 can be achieved by welding, occupying, clamping, screwing, etc.

[0120] The embodiment sets two partitions 26 in the box 20, and the plurality of battery monomers 30 are located between the two partitions 26. The battery monomers 30 will expand during operation, and the two partitions 26 can limit the expansion of the plurality of battery monomers 30. By fixedly connecting the reinforcing rib 211 and the partition 26, the structural stability of the partition 26 can be improved, so that the partition 26 can reliably limit the expansion of the plurality of battery monomers 30.

[0121] According to some embodiments of the present application, please refer to Figures 2 to 4 The battery device 100 can further include an input pipe 60 and an output pipe 70 arranged in the first accommodating cavity 27 and extending along the first direction X. One end of the input pipe 60 is in communication with the liquid inlet flow channel 12, and one end of the output pipe 70 is in communication with the liquid outlet flow channel 13. The other end of the input pipe 60 is used to communicate with the liquid supply flow path located outside the box 20.

[0122] The input pipe 60 connects the liquid supply flow path and the liquid inlet flow channel 12, and the output pipe 70 is used to guide the heat exchange medium in the liquid outlet flow channel 13 out of the box 20. The first accommodating cavity 27 is used to accommodate the input pipe 60 and the output pipe 70, and the third accommodating cavity 29 can be used to accommodate the electrical components (such as the battery management system, etc.) of the battery device 100.

[0123] In some embodiments, as Figure 11 shown, one of the two partitions 26 closer to the first accommodating cavity 27 includes a first sub-partition 261 and a second sub-partition 262 spaced apart along the second direction Y, and the input pipe 60 and the output pipe 70 can also be arranged between the first sub-partition 261 and the second sub-partition 262, that is, the interval between the first sub-partition 261 and the second sub-partition 262 is used to avoid the input pipe 60 and the output pipe 70.

[0124] With the premise that the liquid inlet end of the input pipe 60 and the liquid outlet end of the output pipe 70 are located in the middle of the first wall 22, it can be understood that, in the technical solution in which the liquid inlet channel 12 and the liquid outlet channel 13 are arranged on both sides of all the battery monomers 30 along the second direction Y, the input pipe 60 is bent and extends from the liquid inlet end to the end connected to the liquid inlet channel 12, and the output pipe 70 is bent and extends from the end connected to the liquid outlet channel 13 to the liquid outlet end, resulting in that the lengths of the input pipe 60 and the output pipe 70 are large and the spaces occupied by the input pipe 60 and the output pipe 70 in the box body 20 are large. Moreover, since the lengths of the input pipe 60 and the output pipe 70 are large, the input pipe 60 and the output pipe 70 are connected by adapters to form a plurality of pipe bodies, and the adapters also occupy the space in the box body 20.

[0125] In the embodiment, the input pipe 60 and the output pipe 70 are straightly extended, so that the lengths of the input pipe 60 and the output pipe 70 are small and the spaces occupied by the input pipe 60 and the output pipe 70 in the box body 20 are small, so as to fully utilize the space in the box body 20 to accommodate the battery monomers 30, thereby facilitating the improvement of the volumetric energy density of the battery device 100. Moreover, since the heat exchange medium in the input pipe 60 and the output pipe 70 flows straightly and the flow path is short in the embodiment, the pressure drop is small and the flow resistance is small. Benefiting from the small lengths of the input pipe 60 and the output pipe 70, the adapters do not need to be arranged, so that the space occupied by the adapters can be saved, thereby facilitating the further improvement of the space utilization in the box body 20 and the volumetric energy density.

[0126] According to some embodiments of the present application, as shown in Figure 3 and Figure 10 The battery device 100 can further include two limiters 50 located on the side of the current collection assembly 40 away from the bottom plate 21, and the two limiters 50 correspond to the two partitions 26 one by one. Each limiter 50 is arranged across the two sides of the current collection assembly 40 at both ends along the second direction Y, and both ends of each limiter 50 are fixedly connected to the corresponding partition 26 to limit the movement of the current collection assembly 40 away from the bottom plate 21.

[0127] Both ends of the current collection assembly 40 correspond to the first accommodating cavity 27 and the third accommodating cavity 29, respectively. In some embodiments, both ends of the current collection assembly 40 along the first direction X can be arranged on the partitions 26. In some embodiments, as shown in Figure 11 One of the two partitions 26 closer to the first accommodating cavity 27 includes a first sub-partition 261 and a second sub-partition 262 arranged at intervals along the second direction Y, and one end of the current collection assembly 40 corresponding to the first accommodating cavity 27 can be located between the first sub-partition 261 and the second sub-partition 262, and one end of the current collection assembly 40 corresponding to the third accommodating cavity 29 can be arranged on the partition 26 between the second accommodating cavity 28 and the third accommodating cavity 29. Both ends of the limiter 50 and the partition 26 can be fixedly connected by any one of welding, screwing, clamping, and bonding.

[0128] The embodiment introduces the limiting member 50, which can limit the movement of the bus assembly 40 towards the side away from the bottom plate 21 and can limit the movement of the bus assembly 40 along the second direction Y, so as to improve the installation reliability of the bus assembly 40 and reduce the risk of short circuit caused by the displacement of the bus assembly 40 to contact other electrical components.

[0129] The embodiment of the second aspect of the application provides a power consuming device, which comprises the battery device 100 in the above embodiments, and the battery device 100 is used to provide electric energy.

[0130] The power consuming device includes a vehicle (such as a vehicle 1000, an electric vehicle, a ship, a spacecraft, etc.), a display device (such as a mobile phone, a tablet, a notebook computer, etc.), an electric toy, an electric tool, etc. It can be understood that the power consuming device provided by the application applies any of the above battery devices 100, so that the power consuming device has all the beneficial effects of the above battery devices 100, which will not be described here.

[0131] The embodiment of the third aspect of the application provides an energy storage device, which comprises the battery device 100 in the above embodiments, and the battery device 100 is used to store energy. The energy storage device can include but is not limited to a centralized energy storage device (such as a container energy storage device), a distributed energy storage device, a mobile energy storage device, a wearable energy storage device, etc. It can be understood that the energy storage device provided by the application applies any of the above battery devices 100, so that the energy storage device has all the beneficial effects of the above battery devices 100, which will not be described here.

[0132] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the above description can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described.

[0133] A specific embodiment of the application is described below. It should be understood that the specific embodiment is described only for the purpose of illustration and should not be interpreted as a limitation of the application.

[0134] As Figures 2 to 11As shown, the battery device 100 comprises a box 20 and a heat exchange assembly 10 accommodated in the box 20. The heat exchange assembly 10 comprises 32 heat exchange units 11 arranged in sequence along a first direction X, each heat exchange unit 11 comprising a current collector 111, a first heat exchange member 112a and a second heat exchange member 112b, the first heat exchange member 112a and the second heat exchange member 112b being connected to the two sides of the current collector 111 along a second direction Y. The heat exchange assembly 10 is symmetrically arranged about a center plane S, the center plane S being a plane passing through the center of the box 20 and being perpendicular to the second direction Y.

[0135] Three battery monomers 30 are arranged in sequence along the second direction Y between any two adjacent first heat exchange members 112a, and three battery monomers 30 are arranged in sequence along the second direction Y between any two adjacent second heat exchange members 112b. The battery monomer 30 is in the shape of a cuboid, the first direction X is the thickness direction of the battery monomer 30, and the second direction Y is the length direction of the battery monomer 30. The battery monomer 30 has two first faces 31 opposite to each other along the first direction X, the first face 31 being a large face, any two adjacent first heat exchange members 112a are in contact with the two first faces of the battery monomer 30 located between the two first heat exchange members 112a, and any two adjacent second heat exchange members 112b are in contact with the two first faces of the battery monomer 30 located between the two second heat exchange members 112b.

[0136] Each current collector 111 comprises a body 1111, an inlet pipe 1112 and an outlet pipe 1113 arranged on the body 1111, the body 1111, the inlet pipe 1112 and the outlet pipe 1113 being integrally injection molded by an injection molding process, the inlet pipe 1112 and the outlet pipe 1113 being arranged in overlap along a third direction Z, and the inlet pipe 1112 being located above the outlet pipe 1113. The current collectors 111 of the heat exchange units 11 are arranged in sequence relative to each other along the first direction X, all the inlet pipes 1112 are coaxially arranged to be connected to form an inlet flow channel 12, and all the outlet pipes 1113 are coaxially arranged to be connected to form an outlet flow channel 13. The first heat exchange member 112a and the second heat exchange member 112b each have two flow channels arranged in sequence along the third direction Z, the flow channels extend along the second direction Y, and the two flow channels are connected in series to form a heat exchange flow channel 1121, the flow directions of the heat exchange mediums in the two flow channels are opposite, and the third direction Z is the height direction of the battery monomer 30.

[0137] The current collector 111 is provided with two first holes 1114 and two second holes 1115, the first heat exchange member 112a and the second heat exchange member 112b each communicate with the inflow end of the heat exchange flow channel 1121 through a first hole 1114, and the first heat exchange member 112a and the second heat exchange member 112b each communicate with the outflow end of the heat exchange flow channel 1121 through a second hole 1115.

[0138] The body 1111 has a first side and a second side opposite along the second direction Y, and the liquid inlet pipe 1112 and the liquid outlet pipe 1113 are located between the first side and the second side.

[0139] The box 20 is provided with two partitions 26 oppositely arranged along the first direction X, which divide the internal space of the box 20 into a first containing bin 27, a second containing bin 28 and a third containing bin 29 arranged in sequence along the first direction X, and the heat exchange assembly 10 and all the battery monomers 30 are located in the second containing bin 28. The first containing bin 27 contains an input pipe 60 and an output pipe 70 extending along the first direction X, the liquid outlet end of the input pipe 60 communicates with the liquid inlet channel 12, and the liquid inlet end of the output pipe 70 communicates with the liquid outlet channel 13.

[0140] The bottom plate 21 of the box 20 is provided with a reinforcing rib 211 protruding therefrom, the reinforcing rib 211 is located in the second containing bin 28, the reinforcing rib 211 extends along the first direction X, and one end of the reinforcing rib 211 is welded to the partition 26 located between the second containing bin 28 and the third containing bin 29. Each body 1111 can be provided with a first avoiding notch 1116 at one end facing the bottom plate 21, the reinforcing rib 211 extends along the first direction X from one end of the heat exchange assembly 10 to the other end of the heat exchange assembly 10, and sequentially passes through the first avoiding notch 1116 of each body 1111. The reinforcing rib 211 is symmetrically arranged about the center plane S, and the reinforcing rib 211 is located between the first side and the second side.

[0141] The box 20 is further provided with a current collection assembly 40, the current collection assembly 40 is arranged on the side of the body 1111 away from the bottom plate 21, the current collection assembly 40 extends along the first direction X, one end of the current collection assembly 40 corresponds to the first containing bin 27, and the other end corresponds to the third containing bin 29, and the current collection assembly 40 is located between the first side and the second side.

[0142] The current collection assembly 40 includes a first current collection bar 41 and a second current collection bar 42, the first current collection bar 41 connects the positive electrode terminal of the battery monomer 30 and the high-voltage connector, the second current collection bar 42 connects the negative electrode terminal of the battery monomer 30 and the high-voltage connector, the first current collection bar 41 and the second current collection bar 42 are arranged at intervals along the third direction Z, and the second current collection bar 42 is located on the side of the first current collection bar 41 away from the bottom plate 21. Each body 1111 can be provided with a second avoiding notch 1117 at one end away from the bottom plate 21, the first current collection bar 41 extends from one end to the other end along the first direction X, and sequentially passes through the second avoiding notch 1117 of each body 1111, and the second current collection bar 42 is not located in the second avoiding notch 1117.

[0143] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Box; The heat exchange assembly is accommodated in the box body, and the heat exchange assembly includes a plurality of heat exchange units spaced apart along the first direction. The heat exchange unit includes a collector and two heat exchange elements. The two heat exchange elements are respectively a first heat exchange element and a second heat exchange element. The first heat exchange element and the second heat exchange element are respectively connected to the two sides of the collector along the second direction. The collector includes a body and a liquid inlet pipe and a liquid outlet pipe arranged on the body and spaced apart along the third direction. The heat exchange element is connected to the body. The liquid inlet pipes of the plurality of heat exchange units are sequentially connected along the first direction to form a liquid inlet flow channel. The liquid outlet pipes of the plurality of heat exchange units are sequentially connected along the first direction to form a liquid inlet flow channel. The heat exchanger is connected in sequence in the direction to form a liquid outlet channel, and the orthographic projection of the liquid inlet channel on the bottom plate surface of the box body and the orthographic projection of the liquid outlet channel on the bottom plate surface at least partially overlap, a heat exchange channel is formed inside the heat exchange member, the inlet end of the heat exchange channel is connected with the liquid inlet channel, and the outlet end of the heat exchange channel is connected with the liquid outlet channel; the body has a first side surface and a second side surface opposite to each other along the second direction, each of the bodies is provided with a first avoidance notch at one end facing the bottom plate, and each of the bodies is provided with a second avoidance notch at one end facing away from the bottom plate; the first direction, the second direction and the third direction are perpendicular to each other; A plurality of battery cells are accommodated in the box, and each of the heat exchange elements exchanges heat with at least one of the battery cells; a busbar assembly disposed in the box, the busbar assembly being used to connect the battery cells and the high-voltage connector, the busbar assembly extending from one side of the heat exchange assembly to the other side of the heat exchange assembly along the first direction; Reinforcing ribs are provided on the bottom plate, and the reinforcing ribs extend from the inlet end of the liquid inlet channel to the outlet end of the liquid inlet channel along the first direction, and part of the reinforcing ribs is passed through the first avoidance gap; the confluence assembly, the collector and the reinforcing ribs are arranged in sequence and overlapped along the third direction, and part of the confluence assembly is passed through the second avoidance gap; the reinforcing ribs and the confluence assembly are both located between the first side surface and the second side surface.

2. The battery device according to claim 1, wherein: The central axis of the liquid inlet flow channel and the central axis of the liquid outlet flow channel are located on the same plane, and the plane is perpendicular to the second direction.

3. The battery device according to claim 1, wherein: Along the second direction, the current collectors of the plurality of heat exchange units are all located in the middle of the heat exchange assembly.

4. The battery device according to claim 1, wherein: The heat exchange unit, the reinforcing ribs and the confluence assembly are symmetrically arranged about a center plane, and the center plane is a plane passing through the center of the box and perpendicular to the second direction.

5. The battery device according to claim 1, wherein: Two partitions are provided in the box body, and the two partitions divide the internal space of the box body into a first storage chamber, a second storage chamber and a third storage chamber arranged in sequence along the first direction. The multiple battery cells and the heat exchange assembly are arranged in the second storage chamber, and one end of the reinforcing rib along the first direction is fixedly connected to the partition located between the second storage chamber and the third storage chamber.

6. The battery device according to claim 5, characterized in that The battery device also includes an input tube and an output tube arranged in the first containing compartment and extending along the first direction, one end of the input tube is connected to the liquid inlet channel, one end of the output tube is connected to the liquid outlet channel, and the other end of the input tube is used to communicate with the liquid supply channel located outside the box body.

7. The battery device according to claim 5, characterized in that The battery device also includes two limiting members located on the side of the bus assembly facing away from the base plate, and the two limiting members correspond one-to-one to the two partitions; the two ends of each limiting member along the second direction are arranged across the two sides of the bus assembly, and the two ends of each limiting member are fixedly connected to the corresponding partition to limit the movement of the bus assembly toward the side facing away from the base plate.

8. The battery device according to any one of claims 1 to 7, characterized in that: The battery cell includes two first surfaces arranged opposite to each other along the first direction and two second surfaces arranged opposite to each other along the second direction. The area of ​​the first surface is larger than that of the second surface. The two surfaces of each heat exchange element arranged opposite to each other along the first direction are parallel to the first surface.

9. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 8, and the battery device is used to provide electrical energy.

10. An energy storage device, characterized in that: The energy storage device comprises the battery device according to any one of claims 1 to 8, and the battery device is used to store electrical energy.

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