Battery device and electric device

Abstract

The application discloses a battery device and an electric device, and relates to the technical field of batteries. The battery device comprises a battery monomer assembly, a heat exchange element and a fixing element. The heat exchange element is arranged on the side of the battery monomer assembly in a first direction, and the fixing element is arranged on one side of the heat exchange element in a second direction. The fixing element is used for connecting the heat exchange element and the battery monomer assembly. The end of the heat exchange element close to the fixing element is provided with at least two suspension holes. The plurality of suspension holes are arranged at intervals in a third direction. The fixing element is connected with the heat exchange element through the suspension holes. The two ends of the battery monomer assembly in the third direction are respectively provided with end plates. The opposite ends of the fixing element in the third direction are connected with the end plates. The second direction is a height direction. According to the battery device, the heat exchange element is suspended and fixed on the battery monomer assembly, so that the heat exchange element can be installed or dismounted independently of the battery monomer assembly. When the heat exchange element needs to be maintained, the whole battery device does not need to be disassembled, and the maintenance cost and time are reduced.

Description

TECHNICAL FIELD

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

[0002] In order to meet the heat exchange requirement of the battery device, a heat exchange sheet is pasted on the side of the battery monomer assembly. When the heat exchange sheet has a problem, the heat exchange sheet needs to be replaced. The heat exchange sheet is glued and fixed to the battery monomer assembly. When the heat exchange sheet is replaced, the glue on the battery monomer assembly is easy to remain, and the battery monomer assembly is not easy to replace. In addition, when the battery monomer assembly works, the battery monomer assembly generates heat, which heats the pasted glue. The pasted glue has the risk of delamination and ablation. At the same time, the battery monomer assembly generates thermal expansion, which may cause the heat exchange sheet to fall off from the battery monomer assembly. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, one object of the present application is to provide a battery device. The heat exchange sheet is suspended and fixed to the battery monomer assembly, which facilitates the disassembly of the heat exchange sheet. The heat exchange sheet is movably connected to the battery monomer assembly, which reduces the problem of preventing the heat exchange sheet from being damaged due to the relative displacement between the heat exchange sheet and the battery monomer assembly. This can improve the safety of the battery device, thereby prolonging the service life of the battery device.

[0004] The present application also provides a power consumption device with the above battery device.

[0005] According to the battery device of the first aspect of the present application, the battery device comprises a battery monomer assembly, a heat exchange sheet, and a fixing member. The heat exchange sheet is arranged on the side of the battery monomer assembly in a first direction. The fixing member is arranged on one side of the heat exchange sheet in a second direction. The fixing member is used to connect the heat exchange sheet and the battery monomer assembly. The heat exchange sheet has at least two suspension holes at one end close to the fixing member. The suspension holes are arranged in a third direction. The battery monomer assembly has end plates at both ends in the third direction. The fixing member is connected to the end plates at both ends in the third direction. The fixing member is connected to the heat exchange sheet through the suspension holes. The first direction, the second direction and the third direction are perpendicular to each other. The second direction is a height direction.

[0006] According to the battery device of the present application, the heat exchange sheet is suspended and fixed to the battery monomer assembly, so that the heat exchange sheet can be installed or disassembled independently of the battery monomer assembly. When the heat exchange sheet needs to be repaired, the entire battery device does not need to be disassembled, which reduces the maintenance cost and time. The heat exchange sheet is movably connected to the battery monomer assembly, which reduces the problem of preventing the heat exchange sheet from being damaged due to the relative displacement between the heat exchange sheet and the battery monomer assembly. This can improve the safety of the battery device, thereby prolonging the service life of the battery device.

[0007] In some embodiments, the fixing member comprises a fixing rod, an axis of the hanging hole extends along the third direction, the fixing rod is arranged in the hanging hole, and the fixing rod is connected with the battery monomer assembly.

[0008] In the embodiment, the fixing rod is connected with the hanging hole in the second direction, so that the connection between the heat exchange member and the battery monomer assembly is simple.

[0009] In some embodiments, the fixing member comprises a fixing rod and a fixing buckle, an axis of the hanging hole extends along the first direction, one end of the fixing buckle is arranged in the hanging hole, the other end of the fixing buckle is connected with the fixing rod, the fixing rod is connected with the battery monomer assembly.

[0010] In the embodiment, the fixing buckle is connected with the fixing rod and the battery monomer assembly, so that the fixing rod is connected with the heat exchange member and the battery monomer assembly.

[0011] In some embodiments, the fixing buckle is formed with a through hole extending along the third direction at one end close to the fixing member, and the fixing rod is movably arranged in the through hole.

[0012] In the embodiment, the fixing rod is movably arranged in the through hole, so that the fixing rod can move relative to the heat exchange member in the third direction to absorb the expansion of the battery monomer assembly in the third direction.

[0013] In some embodiments, the fixing buckle comprises oppositely arranged first and second buckles, the first buckle is arranged in the hanging hole and connected with the second buckle.

[0014] In the embodiment, the fixing buckle comprises oppositely arranged first and second buckles, and the first buckle is arranged in the hanging hole and connected with the second buckle, so that the fixing buckle is connected with the heat exchange member.

[0015] In some embodiments, the heat exchange member has a plurality of protrusions extending towards the fixing member, each of the protrusions is provided with the hanging hole.

[0016] In the embodiment, the plurality of protrusions are arranged on the heat exchange plate, so that the structural strength of the heat exchange plate body is not weakened too much, the space of the heat exchange plate body is not occupied, and a plurality of first heat exchange channels can be arranged.

[0017] In some embodiments, the fixing member is provided with a first connecting member at at least one end in the third direction, the end plate is provided with a second connecting member, and the first connecting member is connected with the second connecting member.

[0018] The embodiment can increase the connection strength between the heat exchange element and the end plate, improve the heat exchange efficiency and safety of the heat exchange element, and further improve the safety of the battery device.

[0019] In some embodiments, the first connecting element is relatively movable in a third direction relative to the second connecting element.

[0020] The embodiment can make the heat exchange element absorb the expansion amount of the battery monomer assembly in the third direction.

[0021] In some embodiments, the first connecting element includes a first connecting hole, and the second connecting element is arranged in the first connecting hole, and in the third direction, the size of the first connecting hole is greater than the size of the second connecting element.

[0022] The embodiment can make the second connecting element provide a movement space in the third direction for the first connecting hole, so that the second connecting element can move in the third direction when being installed in the first connecting hole.

[0023] In some embodiments, the second connecting element includes a first fastener detachably connected with the end plate, and the first fastener is arranged in the first connecting hole and used to connect the heat exchange element with the end plate. The embodiment can make the first fastener movably connected with the first connecting hole.

[0024] In some embodiments, the fixing element is made of an elastic material, and the fixing element is connected between the hanging hole and the battery monomer assembly.

[0025] The embodiment can make the fixing element absorb the expansion amount of the battery monomer assembly when the battery monomer assembly expands in the third direction.

[0026] In some embodiments, the fixing element is movably arranged in the hanging hole and fixed around the battery monomer assembly in the circumferential direction.

[0027] The embodiment can make the fixing element movably arranged in the hanging hole and fixed around the battery monomer assembly in the circumferential direction, so as to increase the firmness of the fixing element in fixing the heat exchange element.

[0028] In some embodiments, the fixing element includes a strap, and the strap is bound around the battery monomer assembly in the circumferential direction.

[0029] The present embodiment can fix the heat exchange element and the battery monomer assembly by the cable tie, and the cost is low.

[0030] In some embodiments, the fixing element further comprises a fixing buckle, one end of the fixing buckle is connected with the hanging hole, and the other end is formed with a through hole, and the cable tie is arranged in the through hole.

[0031] The present embodiment provides the fixing buckle, the fixing buckle is used for connecting the heat exchange element and the cable tie, and the fixing buckle is formed with the through hole, so that the cable tie can fix the heat exchange element.

[0032] In some embodiments, the battery monomer assembly is provided with an end plate at each end along a third direction, and the end plate is provided with a third connecting element; the heat exchange element is arranged on the side of the battery monomer assembly along a first direction, at least one end of the heat exchange element along a third direction is provided with a fourth connecting element, the third connecting element and the fourth connecting element are connected and can be relatively moved along the third direction, and the third direction is perpendicular to the first direction.

[0033] The present embodiment provides the heat exchange element by the fourth connecting element fixed to the third connecting element of the end plate, and the third connecting element can be movably connected to the fourth connecting element along the third direction, so that the heat exchange element can not only absorb the expansion amount of the battery monomer assembly along the third direction, but also increase the connection strength of the heat exchange element and the end plate, so as to improve the heat exchange efficiency and safety of the heat exchange element, and further improve the safety of the battery device.

[0034] In some embodiments, the fourth connecting element comprises a second connecting hole, and the third connecting element is arranged in the second connecting hole, and the size of the second connecting hole is greater than the size of the third connecting element along the third direction.

[0035] The present embodiment provides the third connecting element arranged in the second connecting hole, and the size of the second connecting hole is greater than the size of the third connecting element along the third direction, so that the third connecting element can be movably arranged along the third direction when being arranged in the second connecting hole.

[0036] In some embodiments, the third connecting element comprises a second fastener which is detachably connected with the end plate, and the second fastener is arranged in the second connecting hole and used for connecting the heat exchange element and the end plate.

[0037] The present embodiment provides the third connecting element comprising the second fastener, and the second fastener is used for connecting the heat exchange element and the end plate, so that the heat exchange element is simply arranged on the end plate, and the second fastener can be movably connected with the second connecting hole.

[0038] In some embodiments, the heat exchange component comprises at least one heat exchange plate, the heat exchange plate comprises a side plate and two current collectors, the two current collectors are respectively connected to two ends of the side plate in the third direction, and the current collectors are provided with the fourth connecting members.

[0039] In the embodiment, the heat exchange plate comprises the side plate and the two current collectors, and the current collectors are used for injecting or converging the heat exchange medium in the side plate.

[0040] In some embodiments, the current collector has a slot opening towards the side plate, and the end of the side plate in the third direction is inserted into the slot.

[0041] In the embodiment, the end of the side plate in the third direction is inserted into the slot of the corresponding current collector, so that the connection area of the current collector and the side plate is increased, and the sealing performance of the current collector and the side plate is better.

[0042] In some embodiments, the current collector has a plurality of first heat exchange channels, and the fourth connecting members are provided in plurality, and the plurality of fourth connecting members and the plurality of first heat exchange channels are staggered in the second direction.

[0043] In the embodiment, the plurality of fourth connecting members and the plurality of first heat exchange channels are staggered in the second direction, so that the fourth connecting members avoid the first heat exchange channels, and the risk of leakage of the heat exchange medium from the first heat exchange channels is reduced.

[0044] In some embodiments, the side plate has a plurality of second heat exchange channels, and each first heat exchange channel communicates with at least two second heat exchange channels.

[0045] In the embodiment, each first heat exchange channel communicates with at least two second heat exchange channels, so that the current collector plays a role of distributing and converging the heat exchange medium in the side plate.

[0046] In some embodiments, the first heat exchange channel is a V-shaped channel, the V-shaped channel has a first opening and a second opening at two ends in the third direction respectively, the size of the second opening is greater than that of the first opening, the second opening is arranged close to the second heat exchange channel, and the second opening is opposite to at least two second heat exchange channels.

[0047] In the embodiment, the size of the second opening is greater than that of the first opening, so that the second opening can be opposite to at least two second heat exchange channels, the heat exchange medium in one first heat exchange channel can be injected into at least two second heat exchange channels, and the heat exchange medium in at least two second heat exchange channels can be converged into one first heat exchange channel.

[0048] In some embodiments, the second opening has a first communicating port and a second communicating port, the first communicating port and the second communicating port respectively communicating with two adjacent second heat exchange channels, and the first communicating port and the second communicating port have equal flow areas.

[0049] The second opening has a first communicating port and a second communicating port, and the first communicating port and the second communicating port have equal flow areas, so that the flow and flow rate of the heat exchange medium in the two adjacent second heat exchange channels are substantially the same, and the heat exchange effect of the plurality of battery cell assemblies is stable.

[0050] In some embodiments, the heat exchange member further comprises a flow distribution pipe and a flow guide pipe, the flow distribution pipe being connected between the flow guide pipe and the current collector, the flow distribution pipe comprising a main pipe and a plurality of branch pipes in communication with the main pipe, the main pipe being in communication with the flow guide pipe, and the branch pipes being in communication with the first heat exchange channels, and the flow guide pipe being a straight pipe or a bent pipe.

[0051] The flow distribution pipe is connected between the flow guide pipe and the current collector, and is used to inject or converge the heat exchange medium in the second heat exchange channels; and the flow guide pipe is a straight pipe or a bent pipe, so that the direction of the flow guide pipe is adjusted according to the internal space of the battery device, thereby saving the internal space of the battery device.

[0052] In some embodiments, each branch pipe has two protrusions extending towards the current collector, and the two protrusions are located on opposite sides of the first direction of the current collector.

[0053] The protrusions are arranged to increase the connection area between the branch pipe and the current collector, so that the branch pipe and the current collector can be tightly engaged, thereby reducing the risk of leakage of the heat exchange medium.

[0054] In some embodiments, the outer side of the side plate is provided with an insulating coating.

[0055] The insulating coating is arranged on the outer side of the side plate, so that the insulation and voltage resistance requirements of the battery device can be met.

[0056] In some embodiments, the current collector is an integrally formed rubber member.

[0057] The current collector is an integrally formed rubber member, so that the current collector itself has elasticity and can absorb part of the expansion amount of the battery cell assembly, thereby preventing the side plate from being easily affected by the expansion force of the battery cell assembly and falling off.

[0058] In some embodiments, the heat exchange member comprises a plurality of heat exchange plates, the heat exchange plates being arranged on the side of the battery cell assembly in the first direction, and two adjacent heat exchange plates being in communication through a connecting pipe.

[0059] The embodiment sets the heat exchange element to include multiple heat exchange plates, and two adjacent heat exchange plates are communicated through a connecting pipe to adapt to different use scenarios.

[0060] The power utilization device according to the second aspect of the present application comprises the battery device according to the first aspect of the present application.

[0061] According to the power utilization device of the present application, the performance of the battery device is improved, and thus the working power utilization performance of the power utilization device is improved.

[0062] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0063] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood by considering the following description in conjunction with the accompanying drawings, in which:

[0064] Figure 1 is a schematic view of a vehicle according to some embodiments of the present application;

[0065] Figure 2 is a schematic view of a heat exchange element cooperating with a battery cell assembly according to a first embodiment of the present application;

[0066] Figure 3 is a top view of the heat exchange element cooperating with the battery cell assembly in Figure 2

[0067] Figure 4 is a side view of the heat exchange element cooperating with the battery cell assembly in Figure 2

[0068] Figure 5 is a schematic view of a heat exchange element according to a first embodiment of the present application;

[0069] Figure 6 is a front view of the heat exchange element in Figure 5

[0070] Figure 7 is a schematic view of a heat exchange element cooperating with a battery cell assembly according to a second embodiment of the present application;

[0071] Figure 8 is a top view of the heat exchange element cooperating with the battery cell assembly in Figure 7

[0072] Figure 9 is a side view of the heat exchange element cooperating with the battery cell assembly in Figure 7

[0073] Figure 10 is​​​​​Figure 7 Another direction side view of the heat exchange member cooperating with the battery cell assembly;

[0074] Figure 11 is a schematic view of a heat exchange member according to a second embodiment of the present application;

[0075] Figure 12 is Figure 11 Top view of the heat exchange member;

[0076] Figure 13 is Figure 11 Side view of the heat exchange member;

[0077] Figure 14 is a schematic view of a heat exchange plate according to some embodiments of the present application.

[0078] Reference Signs:

[0079] 100, vehicle; 101, battery device; 102, controller; 103, motor;

[0080] 10, battery cell assembly; 11, end plate; 111, second fastener; 112, first fastener;

[0081] 20, heat exchange member; 2, heat exchange plate; 21, side plate; 211, second heat exchange flow channel; 22, current collector; 221, first heat exchange flow channel; 222, first opening; 223, second opening; 2231, first communication port; 2232, second communication port; 224, second connecting hole; 3, shunt pipe; 31, main pipe; 32, branch pipe; 321, protrusion; 4, flow guide pipe; 5, protrusion; 51, hanging hole;

[0082] 61, fixing rod; 611, first connecting hole; 62, fixing buckle; 7, connecting pipe. DETAILED DESCRIPTION

[0083] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or like reference numerals used throughout the drawings denote the same or like elements or elements having the same or the similar functions. The embodiments described below are exemplary only, and are not to be understood as limiting the present application.

[0084] In the description of the present application, it needs to be understood that the terms "upper", "lower", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing 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 limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0085] In the description of the present application, it needs to be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; 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 internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0086] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0087] In order to meet the heat exchange demand of the battery device, the heat exchange sheet is pasted on the side of the battery monomer assembly. When the heat exchange sheet fails, the heat exchange sheet needs to be replaced. The heat exchange sheet is glued and fixed with the battery monomer assembly. When the heat exchange sheet is replaced, the glue is easy to remain on the battery monomer assembly, and it is not easy to replace. In addition, when the battery monomer assembly works, the battery monomer assembly will generate heat, which will heat the pasting glue. The pasting glue has the risk of delamination and ablation. At the same time, the battery monomer assembly will produce thermal expansion, which may cause the heat exchange piece to fall off from the battery monomer assembly.

[0088] Based on the above considerations, the application provides a battery device, which comprises a battery monomer assembly, a heat exchange element, and a fixing element. The fixing element movably connects the heat exchange element and the battery monomer assembly in a second direction. The heat exchange element is suspended on the battery monomer assembly, so that the heat exchange element can be installed or dismounted independently of the battery monomer assembly. When the heat exchange element needs to be repaired, the entire battery device does not need to be disassembled, thereby reducing maintenance cost and time. In addition, the heat exchange element is movably connected with the battery monomer assembly, thereby reducing the problem of extrusion damage between the heat exchange element and the battery monomer assembly due to relative displacement, and prolonging the service life of the battery device. The battery device disclosed in the application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric aircraft toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0089] The following embodiments are described by taking a power consumption device in an embodiment of the application, i.e., a vehicle 100, as an example for convenience of description. The vehicle 100 can be a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The vehicle 100 is internally provided with a battery device 101, which can be arranged at the bottom, the head, or the tail of the vehicle 100. The battery device 101 can be used for power supply of the vehicle 100, for example, the battery device 101 can be used as an operating power source of the vehicle 100. The vehicle 100 can further include a controller 102 and a motor 103. The controller 102 is used to control the battery device 101 to supply power to the motor 103, for example, to meet the power demand of the vehicle 100 during starting, navigation, and driving.

[0090] In some embodiments of the application, the battery device 101 can not only be used as an operating power source of the vehicle 100, but also be used as a driving power source of the vehicle 100, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 100.

[0091] The battery device 101 comprises a box body and a battery monomer assembly 10. The box body itself forms a containing cavity, and the battery monomer assembly 10 is arranged in the containing cavity. The box body includes a bottom guard plate located at the bottom of the battery monomer assembly 10, and is used to provide a containing space for the battery monomer assembly 10.

[0092] Exemplarily, in the battery device 101, the battery cell assembly 10 includes a plurality of battery cells, which can be connected in series, in parallel, or in a mixed manner, where the mixed manner means that the plurality of battery cells are connected in both series and parallel. The plurality of battery cells can be directly connected in series, in parallel, or in a mixed manner, and the battery cell assembly 10 formed by the plurality of battery cells is accommodated in the accommodation cavity. Of course, the battery device 101 can also be in a form that the plurality of battery cells are first connected in series, in parallel, or in a mixed manner to form a battery device 101 module, and the plurality of battery cell modules are then connected in series, in parallel, or in a mixed manner to form an integral whole and are accommodated in the accommodation cavity. The battery device 101 can further include other structures, for example, the battery device 101 can further include a current collecting component for realizing electrical connection between the plurality of battery cells.

[0093] Each battery cell 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 thereto. The battery cell can be in a flat body, a cuboid, or other shapes.

[0094] Figure 2 is a schematic view of the heat exchange member 20 cooperating with the battery cell assembly 10 according to the first embodiment of the present application, Figure 3 is Figure 2 is a top view of the heat exchange member 20 cooperating with the battery cell assembly 10 in the first embodiment, Figure 4 is Figure 2 is a side view of the heat exchange member 20 cooperating with the battery cell assembly 10 in the first embodiment, Figure 5 is a schematic view of the heat exchange member 20 according to the first embodiment of the present application, Figure 6 is Figure 5 is a front view of the heat exchange member 20, Figure 7 is a schematic view of the heat exchange member 20 cooperating with the battery cell assembly 10 according to the second embodiment of the present application, Figure 8 is Figure 7 is a top view of the heat exchange member 20 cooperating with the battery cell assembly 10 in the second embodiment, Figure 9 is Figure 7 is a side view of the heat exchange member 20 cooperating with the battery cell assembly 10 in the second embodiment, Figure 10 is Figure 7 is a side view of the heat exchange member 20 cooperating with the battery cell assembly 10 in the second embodiment from another direction, Figure 11 is a schematic view of the heat exchange member 20 according to the second embodiment of the present application, Figure 12 is Figure 11 is a top view of the heat exchange member 20, Figure 13 is Figure 11 is a side view of the heat exchange member 20, Figure 14 is a schematic view of the heat exchange plate 2 according to some embodiments of the present application.

[0095] The battery device 101 according to the first aspect of the present application comprises: a battery cell assembly 10; a heat exchange member 20 arranged on the side of the battery cell assembly 10 in a first direction, a fixing member arranged on one side of the heat exchange member 20 in a second direction, the fixing member being used for connecting the heat exchange member 20 and the battery cell assembly 10, the heat exchange member 20 having at least two suspension holes 51 at one end close to the fixing member, the plurality of suspension holes 51 being arranged in a third direction, and the fixing member being connected to the heat exchange member 20 through the suspension holes 51; and end plates 11 arranged at both ends of the battery cell assembly 10 in the third direction, respectively, and connected to the fixing member at opposite ends in the third direction.

[0096] The first direction, the second direction and the third direction are perpendicular to each other, and the second direction is a height direction.

[0097] In the present application, the first direction (refer to Y direction in the accompanying drawings) is a front-rear direction, the second direction (refer to Z direction in the accompanying drawings) is an up-down direction, and the third direction (refer to X direction in the accompanying drawings) is a left-right direction. Figure 2 Figure 2 Figure 2

[0098] For example, the battery cell assembly 10 can comprise one or more battery cells, and when the battery cells are multiple, the plurality of battery cells are connected in series, in parallel or in a mixed manner through a busbar. The battery cell assembly 10 can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module. The heat exchange member 20 can be arranged on the side of one battery cell in the second direction, or the heat exchange member 20 can be arranged on the side of one battery module in the second direction. The heat exchange member 20 is provided with a heat exchange flow channel, and a heat exchange medium flows in the heat exchange flow channel. The heat exchange medium can be a glycol water solution, and the heat exchange member 20 is used for heating or cooling the battery cell assembly 10.

[0099] The plurality of battery cells can be stacked in sequence in the third direction, and the end plates 11 are arranged at both ends of the plurality of battery cells in the third direction and used for fixing the plurality of battery cells. The plurality of battery cells can be stacked in sequence in the third direction to form a battery module, and the end plates 11 are arranged at both ends of the battery module in the third direction and used for fixing the battery module.

[0100] The heat exchange member 20 can be provided in plurality, and the number of the heat exchange members 20 can be equal to the number of the battery modules, and the heat exchange members 20 are arranged on opposite sides of the battery modules in the third direction.

[0101] ​​​The first direction is the front-rear direction, and the heat exchange element 20 can be arranged on the side of a battery monomer in the front-rear direction or on the side of a battery module in the front-rear direction. The fixing element is located on one side of the heat exchange element 20 in the second direction, which is the up-down direction. The fixing element is located above the heat exchange element 20 and is used to suspend and fix the heat exchange element 20 to the battery monomer assembly 10. The suspended and fixed heat exchange element 20 can be installed or removed independently of the battery monomer assembly 10. When the heat exchange element 20 needs to be repaired, the entire battery device 101 does not need to be disassembled, thereby reducing maintenance costs and time.

[0102] When the battery monomer assembly 10 is working, thermal expansion occurs. The heat exchange element 20 is connected to the battery monomer assembly 10 in a suspended and fixed manner, so that the heat exchange element 20 is movably connected to the battery monomer assembly 10. The stress generated when the battery monomer assembly 10 expands can be released, thereby reducing the problem of extrusion damage between the heat exchange element 20 and the battery monomer assembly 10 due to relative displacement, and prolonging the service life of the battery device 101.

[0103] The end of the heat exchange element 20 close to the fixing element has at least two suspension holes 51. The plurality of suspension holes 51 are arranged at intervals along the third direction. The heat exchange element 20 can be provided with two suspension holes 51 arranged at intervals along the third direction. The heat exchange element 20 can be provided with more than two suspension holes 51 arranged at intervals along the third direction. The fixing element and the heat exchange element 20 are fixed through the at least two suspension holes 51, which can increase the fixing strength of the heat exchange element 20 and the fixing element.

[0104] The end plate 11 provides a mounting position for the fixing element. The fixing rod 61 is connected to the end plate 11 at opposite ends in the third direction, which can facilitate the installation of the fixing element. For example, the fixing element can include the fixing rod 61, which can be arranged in the suspension hole 51 of the heat exchange element 20 and movably connected to the heat exchange element 20 in the second direction. The fixing rod 61 can be made of elastic material and expand synchronously with the expansion of the battery monomer assembly 10, thereby providing expansion space for the expansion of the battery monomer assembly 10.

[0105] For another example, the fixing element can include a tie, which can be arranged in the suspension hole 51 to bind the heat exchange element 20 to the battery monomer assembly 10. The tie can have elasticity and expand synchronously with the expansion of the battery monomer assembly 10, thereby providing expansion space for the expansion of the battery monomer assembly 10.

[0106] According to the battery device 101 provided by the application, the heat exchange element 20 is suspended and fixed on the battery monomer assembly 10, so that the heat exchange element 20 can be mounted or dismounted independently of the battery monomer assembly 10, and when the heat exchange element 20 needs to be repaired, the whole battery device 101 does not need to be disassembled, thereby reducing the maintenance cost and time; and the heat exchange element 20 is movably connected with the battery monomer assembly 10, thereby reducing the problem of extrusion damage between the heat exchange element 20 and the battery monomer assembly 10 due to relative displacement, improving the safety of the battery device 101, and prolonging the service life of the battery device 101.

[0107] In some embodiments, as shown in Figures 2-7 The fixing member includes a fixing rod 61, the axis of the suspension hole 51 extends along the third direction, the fixing rod 61 is arranged in the suspension hole 51, and the fixing rod 61 is connected with the battery monomer assembly 10.

[0108] For example, the axis of the suspension hole 51 extends along the third direction, the fixing rod 61 can be arranged in the suspension hole 51 along the third direction, the fixing rod 61 is fixedly connected with the heat exchange element 20, and the upper portion of the fixing rod 61 can be fixedly connected with the top of the battery device 101, or the two sides of the fixing rod 61 in the third direction can be fixed with the two sides of the battery monomer assembly 10 in the third direction.

[0109] In the embodiment, the fixing rod 61 and the suspension hole 51 are connected in the second direction, so that the connection mode of the heat exchange element 20 and the battery monomer assembly 10 is simple.

[0110] In some embodiments, as shown in Figures 2-7 The fixing member includes a fixing rod 61 and a fixing buckle 62, the axis of the suspension hole 51 extends along the first direction, one end of the fixing buckle 62 is arranged in the suspension hole 51, the other end of the fixing buckle 62 is connected with the fixing rod 61, and the fixing rod 61 is connected with the battery monomer assembly 10.

[0111] For example, the axis of the suspension hole 51 extends along the first direction, and the fixing buckle 62 is arranged, so that the fixing rod 61 can be connected with the suspension hole 51 of the heat exchange element 20.

[0112] For example, a plurality of fixing buckles 62 are arranged, and the plurality of fixing buckles 62 are arranged in the third direction at intervals. The number of the fixing buckles 62 is equal to the number of the suspension holes in a one-to-one correspondence.

[0113] In the embodiment, the fixing buckle 62 is arranged to connect the fixing rod 61 and the battery monomer assembly 10, so that the fixing rod 61 can be connected with the heat exchange element 20 and the battery monomer assembly 10.

[0114] In some embodiments, as shown in Figures 2-7 One end of the fixing buckle 62 close to the fixing rod 61 is formed with a via hole extending along the third direction, and the fixing rod 61 is movably arranged in the via hole.

[0115] The fixed rod 61 is movably arranged in the through hole, and the fixed rod 61 is movable relative to the heat exchange element in the third direction, and is used for absorbing the expansion of the battery monomer assembly 10 in the third direction.

[0116] In some embodiments, as shown in Figures 2-7 The fixed buckle 62 includes oppositely arranged first and second buckles, and the first buckle extends into the hanging hole 51 and is connected with the second buckle.

[0117] For example, the fixed buckle 62 is sleeved on one end of the fixed rod 61, and the first buckle at the other end can extend into the hanging hole 51 and be connected with the second buckle, which can facilitate the connection of the fixed buckle 62 and the heat exchange element 20.

[0118] The fixed buckle 62 includes oppositely arranged first and second buckles, and the first buckle extends into the hanging hole 51 and is connected with the second buckle, which can facilitate the connection of the fixed buckle 62 and the heat exchange element 20.

[0119] In some embodiments, the heat exchange element 20 has a plurality of protrusions 5 extending towards the fixed buckle 62, and the protrusion 5 has a hanging hole 51.

[0120] The heat exchange element 20 has a plurality of protrusions 5 extending towards the fixed buckle 62, and the protrusion 5 has a hanging hole 51, which can have one hanging hole 51 on one protrusion 5, and the protrusion 5 can be provided with two, and correspondingly, the hanging hole 51 is also provided with two; It can also be provided with at least two hanging holes 51 on one protrusion 5, and the protrusion 5 can be provided with more than two, and correspondingly, the hanging hole 51 is also provided with more than two. A plurality of protrusions 5 are arranged on the heat exchange element 30, and the hanging hole 51 on the protrusion 5 can also not occupy the space of the heat exchange element 30 body, which can avoid weakening the structural strength of the heat exchange element 30 too much.

[0121] The heat exchange plate 2 is provided with a plurality of protrusions 5, which can avoid weakening the structural strength of the heat exchange plate body too much, and can also not occupy the space of the heat exchange plate body, and facilitate the arrangement of a plurality of first heat exchange flow channels 221.

[0122] In some embodiments, as shown in Figures 2-7 The fixed buckle 62 includes oppositely arranged first and second buckles, and the first buckle extends into the hanging hole 51 and is connected with the second buckle.

[0123] Exemplarily, the fixing member is provided with the first connecting member at one end in the third direction, or the fixing member is provided with the first connecting member at opposite ends in the third direction, and the first connecting member and the second connecting member are connected to fix the heat exchange member 20, which can increase the connection strength of the heat exchange member 20 and the end plate 11, so that the heat exchange member 20 is not easy to fall off from the end plate 11.

[0124] For example, the first connecting member can be a first connecting hole 611 provided on the heat exchange member 20, and the second connecting member can be a buckle provided on the end plate 11, which can be located in the first connecting hole 611.

[0125] In the embodiment, the heat exchange member 20 is fixed to the second connecting member of the end plate 11 through the first connecting member, the first connecting member and the second connecting member are connected, which can increase the connection strength of the heat exchange member 20 and the end plate 11, and can improve the heat exchange efficiency and safety of the heat exchange member 20, and further can improve the safety of the battery device 101.

[0126] In some embodiments, as shown in Figures 2-7 The first connecting member can be relatively movable relative to the second connecting member in the third direction.

[0127] Exemplarily, the first connecting member and the second connecting member are movable in the third direction, which can absorb the expansion amount of the battery monomer assembly 10 in the third direction. Through the movable connection of the first connecting member and the second connecting member, the heat exchange member 20 can absorb the expansion amount of the battery monomer assembly 10 in the third direction, and can increase the connection strength of the heat exchange member 20 and the end plate 11, so as to improve the heat exchange efficiency and safety of the heat exchange member 20, and further can improve the safety of the battery device 101.

[0128] In the embodiment, the first connecting member and the second connecting member are movable in the third direction, so that the heat exchange member 20 can absorb the expansion amount of the battery monomer assembly 10 in the third direction.

[0129] In some embodiments, as shown in Figures 2-11 The first connecting member includes a first connecting hole 611, and the second connecting member is arranged in the first connecting hole 611. In the third direction, the size of the first connecting hole 611 is greater than that of the second connecting member.

[0130] Exemplarily, in the third direction, the size of the first connecting hole 611 is greater than that of the second connecting member, and the first connecting hole 611 provides a movable space for the second connecting member in the third direction, so that the second connecting member can move along the third direction when being installed in the first connecting hole 611.

[0131] For example, the second connecting member is a rivet provided on the end plate 11, and the first connecting hole 611 is a waist-shaped hole extending in the third direction, in which the diameter of the rivet is smaller than the length of the waist-shaped hole, so that the rivet can move in the waist-shaped hole in the third direction when the battery cell assembly 10 expands.

[0132] In this embodiment, the second connecting member includes the first fastener 112, which is detachably connected to the end plate 11 and passes through the first connecting hole 611, so as to connect the heat exchange member 20 to the end plate 11. In the third direction, the size of the first connecting hole 611 is greater than that of the second connecting member, so that the second connecting member can move in the third direction when it is installed in the first connecting hole 611.

[0133] In some embodiments, as shown in FIG. 1, the second connecting member includes a first fastener 112 detachably connected to the end plate 11, which passes through the first connecting hole 611 and connects the heat exchange member 20 to the end plate 11. Figures 2-11

[0134] For example, the first fastener 112 can be a bolt, which can be installed on the end plate 11 through the first connecting hole 611, so that the heat exchange member 20 is installed on the end plate 11 in a simple manner, and the bolt can be movably connected to the first connecting hole 611. The first fastener 112 can be used to connect the heat exchange plate 2 and the end plate 11, and can move in the third direction in the first connecting hole 611.

[0135] In this embodiment, the second connecting member includes the first fastener 112, which is used to connect the heat exchange member 20 to the end plate 11, so that the heat exchange member 20 is installed on the end plate 11 in a simple manner, and the first fastener 112 can be movably connected to the first connecting hole 611.

[0136] In some embodiments, the fixing member is made of an elastic material and is connected between the hanging hole 51 and the battery cell assembly 10.

[0137] For example, the fixing member is made of an elastic material and has elasticity itself, which can absorb the expansion of the battery cell assembly 10 when the battery cell assembly 10 expands in the third direction.

[0138] In this embodiment, the fixing member is made of an elastic material, which can absorb the expansion of the battery cell assembly 10 when the battery cell assembly 10 expands in the third direction.

[0139] In some embodiments, the fixing member movably passes through the hanging hole 51 and is fixed around the circumference of the battery cell assembly 10.

[0140] ​The fixing member is arranged in the through hole, so that the fixing member is not easy to fall off from the heat exchange element 20, and the fixing member can increase the firmness of fixing the heat exchange element 20.

[0141] In the embodiment, the fixing member is movably arranged in the hanging hole 51 and is fixed around the circumference of the battery monomer assembly 10, so that the fixing member can increase the firmness of fixing the heat exchange element 20.

[0142] In some embodiments, the fixing member includes a cable tie, and the cable tie is bound around the circumference of the battery monomer assembly 10.

[0143] In the embodiment, the cable tie is bound around the circumference of the battery monomer assembly 10, so that the fixing member and the battery monomer assembly 10 have low cost.

[0144] In some embodiments, the fixing member further includes a fixing buckle 62, one end of the fixing buckle 62 is connected with the hanging hole 51 and is formed with a through hole, and the other end of the fixing buckle 62 is formed with a through hole, and the cable tie is arranged in the through hole.

[0145] For example, the fixing buckle 62 is provided in a plurality of ways, and the plurality of fixing buckles 62 are arranged at intervals along the third direction.

[0146] In the embodiment, the fixing buckle 62 is arranged, the fixing buckle 62 is used for connecting the cable tie and the heat exchange element 20, the fixing buckle 62 is formed with a through hole, and the cable tie can be fixed to the heat exchange element 20.

[0147] In some embodiments, as shown in Figures 2-7 The battery monomer assembly 10 is provided with an end plate 11 at each end along the third direction, and the end plate 11 is provided with a third connecting piece; the heat exchange element 20 is provided with a fourth connecting piece at at least one end along the third direction, the third connecting piece and the fourth connecting piece are connected and can move relatively along the third direction, and the third direction is perpendicular to the first direction.

[0148] For example, when the battery monomer assembly 10 works, the battery monomer assembly 10 expands along the third direction. In the related art, the heat exchange element 20 is pasted on the side of the battery monomer assembly 10 along the first direction. When the battery monomer assembly 10 works, the battery monomer assembly 10 generates heat, which heats the pasting glue. The pasting glue has the risk of delamination and ablation. In addition, the heat exchange element 20 is pasted on the side of the battery monomer assembly 10. When the battery monomer assembly 10 expands along the third direction, the expansion force of the battery monomer assembly 10 can be greater than the fixing force of the heat exchange element 20, which can cause the heat exchange element 20 to fall off from the battery monomer assembly 10.

[0149] The third connecting member and the fourth connecting member are connected to fix the heat exchange member 20 to the end plate 11. The heat exchange member 20 is provided with the fourth connecting member at one end in the third direction, or the heat exchange member 20 is provided with the fourth connecting member at both ends in the third direction. The third connecting member and the fourth connecting member are movable in the third direction, and can absorb the expansion amount of the battery monomer assembly 10 in the third direction. In addition, the third connecting member and the fourth connecting member are connected to fix the heat exchange member 20, which can increase the connection strength between the heat exchange member 20 and the end plate 11, so that the heat exchange member 20 is not easy to fall off from the end plate 11. Through the movable connection of the third connecting member and the fourth connecting member, the heat exchange member 20 can absorb the expansion amount of the battery monomer assembly 10 in the third direction, and can also increase the connection strength between the heat exchange member 20 and the end plate 11, thereby improving the heat exchange efficiency of the heat exchange member 20 and the safety of the heat exchange member 20, and further improving the safety of the battery device 101.

[0150] For example, the fourth connecting member can be a second connecting hole 224 provided on the heat exchange member 20, and the third connecting member can be a buckle provided on the end plate 11. The buckle can be located in the second connecting hole 224, and the buckle can move in the third direction within the second connecting hole 224 when the battery monomer assembly 10 expands in the third direction.

[0151] According to the battery device 101 of the present application, the heat exchange member 20 is fixed to the third connecting member of the end plate 11 through the fourth connecting member, and the third connecting member is movably connected to the fourth connecting member in the third direction. Therefore, the heat exchange member 20 can not only absorb the expansion amount of the battery monomer assembly 10 in the third direction, but also increase the connection strength between the heat exchange member 20 and the end plate 11, so as to improve the heat exchange efficiency and safety of the heat exchange member 20, and further improve the safety of the battery device 101.

[0152] In some embodiments, as shown in Figures 2-11 The fourth connecting member includes a second connecting hole 224, and the third connecting member is arranged in the second connecting hole 224. In the third direction, the size of the second connecting hole 224 is greater than the size of the third connecting member.

[0153] For example, in the third direction, the size of the second connecting hole 224 is greater than the size of the third connecting member, and the second connecting hole 224 provides a movable space for the third connecting member in the third direction, so that the third connecting member can move in the third direction when installed in the second connecting hole 224.

[0154] For example, the third connecting member is a rivet provided on the end plate 11, and the second connecting hole 224 is a waist-shaped hole extending in the third direction. In the third direction, the diameter of the rivet is less than the length of the waist-shaped hole, so that the rivet can move in the third direction within the waist-shaped hole when the battery monomer assembly 10 expands in the third direction.

[0155] In the embodiment, the third connecting member is arranged to pass through the second connecting hole 224, and the size of the second connecting hole 224 is greater than that of the third connecting member in the third direction. The second connecting hole 224 provides a moving space for the third connecting member in the third direction, so that the third connecting member can move in the third direction when being installed in the second connecting hole 224.

[0156] In some embodiments, as shown in Figures 2-11 The third connecting member includes a second fastener 111 detachably connected with the end plate 11. The second fastener 111 passes through the second connecting hole 224 and is used to connect the heat exchange member 20 and the end plate 11.

[0157] For example, the second fastener 111 can be a bolt. The bolt can be installed on the end plate 11 through the second connecting hole 224, so that the heat exchange member 20 is installed on the end plate 11 in a simple way, and the bolt can be movably connected with the second connecting hole 224. The second fastener 111 can be used to connect the heat exchange plate 2 and the end plate 11, and the second fastener 111 can move in the third direction in the second connecting hole 224.

[0158] In the embodiment, the third connecting member includes the second fastener 111. The second fastener 111 is used to connect the heat exchange member 20 and the end plate 11, so that the heat exchange member 20 is installed on the end plate 11 in a simple way, and the second fastener 111 can be movably connected with the second connecting hole 224.

[0159] In some embodiments, as shown in Figures 2-11 The heat exchange member 20 includes at least one heat exchange plate 2. The heat exchange plate 2 includes a side plate 21 and two current collectors 22. The two current collectors 22 are respectively connected to the two ends of the side plate 21 in the third direction. The current collector 22 is provided with a fourth connecting member.

[0160] For example, the heat exchange member 20 can include one heat exchange plate 2, or the heat exchange member 20 can include a plurality of heat exchange plates 2. Each heat exchange plate 2 is arranged on the side of the battery monomer assembly 10 in the first direction. For example, the heat exchange member 20 can include two heat exchange plates 2. The two heat exchange plates 2 can be respectively located on the opposite sides of the battery monomer assembly 10 in the first direction.

[0161] The two current collectors 22 are respectively located on the two ends of the side plate 21 in the third direction. The two current collectors 22 are respectively provided with a fourth connecting member, which is used to increase the connection strength between the heat exchange member 20 and the end plate 11. The side plate 21 is arranged on the side of the battery monomer assembly 10 in the first direction. The current collector 22 is arranged on the two sides of the end plate 11 in the first direction. The current collector 22 is used to inject or collect the heat exchange medium in the side plate 21.

[0162] The heat exchange plate 2 includes the side plate 21 and the two current collectors 22, and the current collectors 22 are used to inject or converge the heat exchange medium in the side plate 21.

[0163] In some embodiments, as shown in Figures 2-11 The current collector 22 has a slot opening towards the side plate 21, and the end of the side plate 21 along the third direction is inserted into the slot.

[0164] For example, the two ends of the side plate 21 along the third direction are respectively inserted into the corresponding slots, which can increase the connection area of the current collector 22 and the side plate 21, so that the sealing performance of the current collector 22 and the side plate 21 is better, and the risk of leakage of the heat exchange medium from the connection between the current collector 22 and the side plate 21 is reduced.

[0165] For example, the two ends of the side plate 21 along the third direction are respectively inserted into the corresponding slots of the current collector 22, which can increase the connection area of the current collector 22 and the side plate 21, so that the sealing performance of the current collector 22 and the side plate 21 is better.

[0166] In some embodiments, as shown in Figure 14 The current collector 22 has a plurality of first heat exchange channels 221, and the fourth connecting piece is provided with a plurality of fourth connecting pieces, and the plurality of fourth connecting pieces and the plurality of first heat exchange channels 221 are staggered along the second direction, and the third direction, the first direction and the second direction are perpendicular to each other.

[0167] For example, a plurality of fourth connecting pieces are arranged on each current collector 22, so that the current collector 22 and the end plate 11 have a plurality of fastening points, which are used to increase the connection strength of the current collector 22 and the end plate 11. The plurality of fourth connecting pieces and the plurality of first heat exchange channels 221 are staggered along the second direction, so that the fourth connecting pieces avoid the first heat exchange channels 221, and the risk of leakage of the heat exchange medium from the first heat exchange channels 221 is reduced.

[0168] For example, the plurality of fourth connecting pieces and the plurality of first heat exchange channels 221 are staggered along the second direction, so that the fourth connecting pieces avoid the first heat exchange channels 221, and the risk of leakage of the heat exchange medium from the first heat exchange channels 221 is reduced.

[0169] In some embodiments, as shown in Figure 14 The side plate 21 has a plurality of second heat exchange channels 211, and each first heat exchange channel 221 communicates with at least two second heat exchange channels 211.

[0170] Exemplarily, each first heat exchange channel 221 communicates with two second heat exchange channels 211, or each first heat exchange channel 221 communicates with more than two second heat exchange channels 211. Each first heat exchange channel 221 communicates with at least two second heat exchange channels 211, so that the current collector 22 plays a role of distributing and converging the heat exchange medium in the side plate 21, one current collector 22 distributes the heat exchange medium into the side plate 21, and the other current collector 22 converges the heat exchange medium in the side plate 21.

[0171] The plurality of second heat exchange channels 211 in the side plate 21 extend along the third direction, so that the heat exchange medium is uniformly distributed in the side plate 21, so that the heat exchange temperature and the heat exchange efficiency of the side plate 21 are substantially the same, and the heat exchange effect of the battery monomer assembly 10 is improved.

[0172] For example, the current collector 22 has two first heat exchange channels 221, and the side plate 21 has four second heat exchange channels 211. One first heat exchange channel 221 can inject the heat exchange medium into two second heat exchange channels 211, and the heat exchange medium in the two second heat exchange channels 211 can converge to one first heat exchange channel 221.

[0173] In the embodiment, each first heat exchange channel 221 communicates with at least two second heat exchange channels 211, so that the current collector 22 plays a role of distributing and converging the heat exchange medium in the side plate 21.

[0174] In some embodiments, as shown in Figure 14 The first heat exchange channel 221 is a V-shaped channel, and the V-shaped channel has a first opening 222 and a second opening 223 at two ends along the third direction, respectively. The size of the second opening 223 is greater than that of the first opening 222, the second opening 223 is arranged close to the second heat exchange channel 211, and the second opening 223 is opposite to at least two second heat exchange channels 211.

[0175] Exemplarily, the second opening 223 can be opposite to two second heat exchange channels 211, or the second opening 223 can be opposite to more than two second heat exchange channels 211. The size of the second opening 223 is greater than that of the first opening 222, so that the second opening 223 can be opposite to at least two second heat exchange channels 211, the heat exchange medium in one first heat exchange channel 221 can be injected into at least two second heat exchange channels 211, and the heat exchange medium in at least two second heat exchange channels 211 can be converged into one first heat exchange channel 221.

[0176] The second opening 223 is arranged to have a size larger than that of the first opening 222, so that the second opening 223 can be opposite to at least two second heat exchange channels 211, and the heat exchange medium in one first heat exchange channel 221 can be injected into the at least two second heat exchange channels 211, and the heat exchange medium in the at least two second heat exchange channels 211 can be merged into one first heat exchange channel 221.

[0177] In some embodiments, as shown in Figure 14 The second opening 223 has a first communication port 2231 and a second communication port 2232, which are respectively communicated with two adjacent second heat exchange channels 211, and the flow areas of the first communication port 2231 and the second communication port 2232 are equal.

[0178] For example, the first communication port 2231 and the second communication port 2232 are used to guide the heat exchange medium in the first heat exchange channel 221 into two adjacent second heat exchange channels 211, and the flow areas of the first communication port 2231 and the second communication port 2232 are equal, so that the flow and flow rate of the heat exchange medium in the two adjacent second heat exchange channels 211 are substantially the same, and the heat exchange effect of the plurality of battery cell assemblies 10 is stable.

[0179] The second opening 223 has a first communication port 2231 and a second communication port 2232, which are respectively communicated with two adjacent second heat exchange channels 211, and the flow areas of the first communication port 2231 and the second communication port 2232 are equal.

[0180] In some embodiments, as shown in Figures 2-11 The heat exchange member 20 further comprises a flow distribution pipe 3 and a flow guide pipe 4, the flow distribution pipe 3 is connected between the flow guide pipe 4 and the current collector 22, the flow distribution pipe 3 comprises a main pipe 31 and a plurality of branch pipes 32 communicated with the main pipe 31, the main pipe 31 is communicated with the flow guide pipe 4, the branch pipes 32 are communicated with the first heat exchange channels 221, and the flow guide pipe 4 is a straight pipe or a bent pipe.

[0181] For example, the flow distribution pipe 3 can be a total water inlet pipe of the battery device 101, the flow distribution pipe 3 is arranged adjacent to the current collector 22, and the flow distribution pipe 3 distributes the heat exchange medium in the flow guide pipe 4 into different first heat exchange channels 221. The flow distribution pipe 3 is communicated with both of the current collectors 22 of the heat exchange member 20, and the flow guide pipe 4 is connected to the other end of the flow distribution pipe 3.

[0182] The heat exchange medium in the flow guide pipe 4 at the water inlet end flows into the plurality of branch pipes 32 through the main pipe 31, flows into the first heat exchange flow channel 221 through the plurality of branch pipes 32, flows into the second heat exchange flow channel 211 through the first heat exchange flow channel 221, and flows into the current collector 22 at the water outlet end after exchanging heat with the battery monomer assembly 10. The heat exchange medium in the second heat exchange flow channel 211 flows into the plurality of branch pipes 32 through the first heat exchange flow channel 221, converges into the main pipe 31 through the plurality of branch pipes 32, and flows into the flow guide pipe 4 through the main pipe 31, completing one circulation of the heat exchange medium in the heat exchange member 20.

[0183] The flow guide pipe 4 is a straight pipe or a bent pipe, and the direction of the flow guide pipe 4 can be adjusted according to the internal space of the battery device 101, thereby saving the internal space of the battery device 101 and improving the overall energy density of the battery device 101.

[0184] For example, the flow distribution pipe 3 can be a tee pipe.

[0185] In one specific example, the flow guide pipe 4 and the flow distribution pipe 3 are both made of nylon material, and the flow distribution pipe 3 is integrally pressed with the current collector 22 by a hot pressing process.

[0186] The embodiment sets the flow distribution pipe 3 and the flow guide pipe 4, the flow distribution pipe 3 is connected between the flow guide pipe 4 and the current collector 22, and is used for injecting or converging the heat exchange medium in the second heat exchange flow channel 211. The flow guide pipe 4 is a straight pipe or a bent pipe, and the direction of the flow guide pipe 4 can be adjusted according to the internal space of the battery device 101, thereby saving the internal space of the battery device 101.

[0187] In some embodiments, as shown in Figures 2-7 Each branch pipe 32 has two protrusions 321 extending towards the current collector 22, and the two protrusions 321 are located on opposite sides of the first direction of the current collector 22.

[0188] The embodiment sets the protrusions 321 to increase the connection area of the branch pipe 32 and the current collector 22, so that the branch pipe 32 and the current collector 22 can be tightly engaged, thereby reducing the risk of leakage of the heat exchange medium.

[0189] In some embodiments, as shown in Figures 2-7 The outer side of the side plate 21 is provided with an insulating coating.

[0190] The embodiment sets the insulating coating on the outer side of the side plate 21 to meet the requirements of the insulation voltage resistance of the battery device 101.

[0191] In some embodiments, as shown in Figures 2-7 The current collector 22 is an integrally formed rubber member.

[0192] Exemplarily, two ends of the side plate 21 along the third direction are respectively inserted into the insertion slots of the current collector 22, the current collector 22 is an integrally formed rubber piece, the side plate 21 and the current collector 22 can be joined by a vulcanization process, and the risk of leakage of the heat exchange medium from the connection between the current collector 22 and the side plate 21 can be reduced, so as to improve the pressure resistance requirement of the battery device 101.

[0193] The current collector 22 is a rubber piece, so that the current collector 22 itself has elasticity and can absorb part of the expansion amount of the battery monomer assembly 10, so that the side plate 21 is not easy to be affected by the expansion force of the battery monomer assembly 10 and fall off.

[0194] The current collector 22 is a rubber piece, so that the current collector 22 itself has elasticity and can absorb part of the expansion amount of the battery monomer assembly 10, so that the side plate 21 is not easy to be affected by the expansion force of the battery monomer assembly 10 and fall off.

[0195] In some embodiments, as shown in Figures 7-13 The heat exchange piece 20 includes a plurality of heat exchange plates 2, the heat exchange plates 2 are arranged on the side of the battery monomer assembly 10 in the first direction, and two adjacent heat exchange plates 2 are communicated by a connecting pipe 7.

[0196] Exemplarily, according to actual needs, the heat exchange piece 20 includes a plurality of heat exchange plates 2 to adapt to different use scenarios.

[0197] Two adjacent heat exchange plates 2 are communicated by a connecting pipe 7, and the heat exchange medium can flow circularly between all the heat exchange plates 2, so as to realize more uniform temperature distribution in the plurality of battery monomer assemblies 10 and reduce local overheating phenomenon.

[0198] For example, two adjacent heat exchange plates 2 are connected by a plurality of connecting pipes 7, each connecting pipe 7 has two extension blocks extending towards the current collector 22, and the two extension blocks are respectively located on opposite sides of the current collector 22 in the first direction.

[0199] Exemplarily, according to actual needs, the heat exchange piece 20 includes a plurality of heat exchange plates 2 to adapt to different use scenarios.

[0200] According to the power utilization device of the second aspect of the present application, the battery device 101 of the first aspect of the present application is included.

[0201] According to the power utilization device of the present application, the performance of the battery device 101 is improved, so as to improve the working power utilization performance of the power utilization device.

[0202] The battery device 101 according to one specific embodiment of the present application will be described below with reference to Figures 1-14 The battery device 101 according to one specific embodiment of the present application will be described below with reference to

[0203] The battery device 101 comprises a battery cell assembly 10, a heat exchange member 20 and a fixing rod 61, the battery cell assembly 10 can comprise a plurality of battery modules, end plates 11 are respectively arranged at two ends of the battery cell assembly 10 along a third direction, the fixing rod 61 is located on one side of the heat exchange member 20 along a second direction, and the fixing rod 61 is used for connecting the heat exchange member 20 and the battery cell assembly 10. The fixing rod 61 is provided with a first connecting hole 611 at each end along the third direction, the end plate 11 is provided with a first fastener 112 which is detachably connected with the end plate 11, and the first fastener 112 is arranged in the first connecting hole 611, and the size of the first connecting hole 611 is greater than the size of the first fastener 112 along the third direction.

[0204] The heat exchange member 20 and the fixing rod 61 are connected through a fixing buckle 62, one end of the fixing buckle 62 is sleeved on the fixing rod 61, and the other end comprises a first buckle and a second buckle which are oppositely arranged, the heat exchange plate 2 has a plurality of protrusions 5 extending towards the fixing buckle 62, the protrusion 5 has a hanging hole 51, the first buckle extends into the hanging hole 51 and is connected with the second buckle.

[0205] The end plate 11 is provided with a second fastener 111 which is detachably connected with the end plate 11, and the heat exchange member 20 can be provided with a plurality of heat exchange members 20, each of which is arranged on the side of the battery module along a first direction. The heat exchange member 20 comprises a heat exchange plate 2, the heat exchange plate 2 comprises a side plate 21 and two current collectors 22, the two current collectors 22 are respectively connected at two ends of the side plate 21 along a third direction, and the outer side of the side plate 21 is provided with an insulating coating. The current collector 22 is provided with a second connecting hole 224, and the second fastener 111 is arranged in the second connecting hole 224, and the size of the second connecting hole 224 is greater than the size of the second fastener 111 along the third direction.

[0206] The current collector 22 has a slot opening towards the side plate 21, the end of the side plate 21 along the third direction is inserted into the slot, the current collector 22 is an integrally formed rubber part, and the current collector 22 is bonded with the side plate 21 by a vulcanization process. The current collector 22 has two first heat exchange channels 221, the second connecting hole 224 is provided with a plurality of second connecting holes 224, and the plurality of second connecting holes 224 and the plurality of first heat exchange channels 221 are staggered along a second direction. The side plate 21 has four second heat exchange channels 211, and each first heat exchange channel 221 communicates with two second heat exchange channels 211.

[0207] The first heat exchange flow channel 221 is a V-shaped flow channel, and the V-shaped flow channel has a first opening 222 and a second opening 223 at two ends in the third direction, respectively. The second opening 223 has a size larger than that of the first opening 222, is arranged close to the second heat exchange flow channel 211, and is opposite to the two second heat exchange flow channels 211. The second opening 223 has a first communication opening 2231 and a second communication opening 2232, which are in communication with the two adjacent second heat exchange flow channels 211, respectively. The first communication opening 2231 and the second communication opening 2232 have equal flow areas.

[0208] The heat exchange element 20 further comprises a distribution pipe 3 and a flow guide pipe 4. The distribution pipe 3 is connected between the flow guide pipe 4 and the current collector 22. The distribution pipe 3 comprises a main pipe 31 and a plurality of branch pipes 32 in communication with the main pipe 31. The main pipe 31 is in communication with the flow guide pipe 4, and the branch pipes 32 are in communication with the first heat exchange flow channel 221. The flow guide pipe 4 is a straight pipe or a bent pipe. Each branch pipe 32 has two protrusions 321 extending towards the current collector 22, and the two protrusions 321 are located on opposite sides of the current collector 22 in the first direction.

[0209] Embodiment one,

[0210] The heat exchange element 20 is provided in plurality, and each heat exchange element 20 comprises one heat exchange plate 2. One heat exchange plate 2 is located on a side of the battery module in the first direction.

[0211] Embodiment two,

[0212] The heat exchange element 20 is provided in plurality, and each heat exchange element 20 comprises a plurality of heat exchange plates 2. The plurality of heat exchange plates 2 of one heat exchange element 20 are located on opposite sides of the battery module in the first direction.

[0213] In the description of the present specification, the description referring to the terms "some embodiments", "optionally", "further", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0214] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device (101), characterized in that, include: Battery cell assembly (10); A heat exchanger (20) is disposed on the side of the battery cell assembly (10) in a first direction; A fixing member is located on one side of the heat exchanger (20) in a second direction. The fixing member is used to connect the heat exchanger (20) to the battery cell assembly (10). The heat exchanger (20) has at least two hanging holes (51) at one end near the fixing member. A plurality of hanging holes (51) are arranged at intervals along a third direction. The fixing member is connected to the heat exchanger (20) through the hanging holes (51). The heat exchanger (20) includes at least one heat exchange plate (2). The heat exchange plate (2) includes a side plate (21) and two current collectors (22). The side plate (21) is provided with The battery cell assembly (10) has a suspension hole (51) and end plates (11) are respectively provided at both ends along the third direction. The fixing member is connected to the end plate (11) at both opposite ends of the third direction. The first direction, the second direction and the third direction are perpendicular to each other. The second direction is the height direction. The fixing member is provided with a first connector at at least one end of the third direction. The end plate (11) has a second connector. The first connector and the second connector are connected. The first connector can move relative to the second connector along the third direction.

2. The battery device (101) according to claim 1, characterized in that, The fixing member includes a fixing rod (61), the axis of the suspension hole (51) extends along the third direction, the fixing rod (61) passes through the suspension hole (51) and is connected to the battery cell assembly (10).

3. The battery device (101) according to claim 1, characterized in that, The fixing component includes a fixing rod (61) and a fixing buckle (62). The axis of the suspension hole (51) extends along the first direction. One end of the fixing buckle (62) passes through the suspension hole (51), and the other end is connected to the fixing rod (61). The fixing rod (61) is connected to the battery cell assembly (10).

4. The battery device (101) according to claim 3, characterized in that, The fixing buckle (62) has a through hole extending in the third direction at one end near the fixing rod (61), and the fixing rod (61) is movably inserted through the through hole.

5. The battery device (101) according to claim 3, characterized in that, The fixing buckle (62) includes a first buckle and a second buckle arranged opposite to each other, the first buckle extending into the suspension hole (51) and connected to the second buckle.

6. The battery device (101) according to claim 1, characterized in that, The heat exchanger (20) has a plurality of protrusions (5) extending toward the fixing member, each of the protrusions (5) having the suspension hole (51).

7. The battery device (101) according to claim 1, characterized in that, The first connector includes a first connecting hole (611), and the second connector passes through the first connecting hole (611). In the third direction, the size of the first connecting hole (611) is larger than the size of the second connector.

8. The battery device (101) according to claim 7, characterized in that, The second connector includes a first fastener (112) detachably connected to the end plate (11), the first fastener (112) passing through the first connection hole (611) for connecting the heat exchanger (20) to the end plate (11).

9. The battery device (101) according to claim 1, characterized in that, The fastener is made of an elastic material and is connected between the suspension hole (51) and the battery cell assembly (10).

10. The battery device (101) according to claim 9, characterized in that, The fastener is movably inserted through the suspension hole (51) and is circumferentially fixed around the battery cell assembly (10).

11. The battery device (101) according to claim 10, characterized in that, The fastener includes cable ties that are secured around the circumference of the battery cell assembly (10).

12. The battery device (101) according to claim 11, characterized in that, The fastener also includes a fixing buckle (62), one end of which is connected to the hanging hole (51), and the other end forms a through hole, through which the cable tie passes.

13. The battery device (101) according to claim 1, characterized in that, The battery cell assembly (10) has end plates (11) at both ends along the third direction. The end plates (11) are provided with third connectors. The heat exchanger (20) has a fourth connector at at least one end along the third direction. The third connector and the fourth connector are connected and can move relative to each other along the third direction.

14. The battery device (101) according to claim 13, characterized in that, The fourth connector includes a second connecting hole (224), and the third connector passes through the second connecting hole (224). In the third direction, the size of the second connecting hole (224) is larger than the size of the third connector.

15. The battery device (101) according to claim 14, characterized in that, The third connector includes a second fastener (111) detachably connected to the end plate (11). The second fastener (111) passes through the second connection hole (224) and is used to connect the heat exchanger (20) and the end plate (11).

16. The battery device (101) according to claim 13, characterized in that, The two current collectors (22) are respectively connected to the two ends of the side plate (21) in a third direction, and the current collectors (22) are provided with the fourth connector.

17. The battery device (101) according to claim 16, characterized in that, The current collector (22) has a slot that opens toward the side plate (21), the side plate (21) being inserted into the slot at its third-direction end.

18. The battery device (101) according to claim 16, characterized in that, The current collector (22) has multiple first heat exchange channels (221), and multiple fourth connectors are provided. The multiple fourth connectors and the multiple first heat exchange channels (221) are arranged alternately along the second direction.

19. The battery device (101) according to claim 18, characterized in that, The side plate (21) has multiple second heat exchange channels (211), and each of the first heat exchange channels (221) is connected to at least two of the second heat exchange channels (211).

20. The battery device (101) according to claim 19, characterized in that, The first heat exchange channel (221) is a V-shaped channel. The V-shaped channel has a first opening (222) and a second opening (223) at both ends along the third direction. The size of the second opening (223) is larger than the size of the first opening (222). The second opening (223) is located close to the second heat exchange channel (211) and is opposite to at least two of the second heat exchange channels (211).

21. The battery device (101) according to claim 20, characterized in that, The second opening (223) has a first connecting port (2231) and a second connecting port (2232), the first connecting port (2231) and the second connecting port (2232) are respectively connected to two adjacent second heat exchange channels (211), and the flow areas of the first connecting port (2231) and the second connecting port (2232) are equal.

22. The battery device (101) according to claim 19, characterized in that, The heat exchanger (20) further includes a branch pipe (3) and a guide pipe (4). The branch pipe (3) is connected between the guide pipe (4) and the collector (22). The branch pipe (3) includes a main pipe (31) and multiple branch pipes (32) connected to the main pipe (31). The main pipe (31) is connected to the guide pipe (4), and the branch pipes (32) are connected to the first heat exchange channel (221). The guide pipe (4) is a straight pipe or a bent pipe.

23. The battery device (101) according to claim 22, characterized in that, Each of the branch pipes (32) has two protrusions (321) extending toward the current collector (22), the two protrusions (321) being located on opposite sides of the current collector (22) in the first direction.

24. The battery device (101) according to claim 16, characterized in that, The outer surface of the side plate (21) is provided with an insulating coating.

25. The battery device (101) according to claim 16, characterized in that, The current collector (22) is a one-piece molded rubber part.

26. The battery device (101) according to claim 1, characterized in that, The heat exchanger (20) includes a plurality of heat exchange plates (2), which are disposed on the side of the battery cell assembly (10) in a first direction, and two adjacent heat exchange plates (2) are connected by a connecting pipe (7).

27. An electrical appliance, characterized in that, include: The battery device (101) according to any one of claims 1-26.

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