Battery device and electric device

Abstract

The invention discloses a battery device and a power utilization device, and relates to the technical field of batteries, the battery device comprises a battery monomer assembly, a heat exchange part and a fixing part, the heat exchange part is arranged on the side face of the battery monomer assembly in the first direction, and the fixing part is located on one side of the heat exchange part in the second direction; the fixing piece is used for connecting the heat exchange piece and the battery monomer assembly, at least two hanging holes are formed in the end, close to the fixing piece, of the heat exchange piece, the multiple hanging holes are distributed at intervals in the third direction, the fixing piece is connected with the heat exchange piece through the hanging holes, and end plates are arranged at the two ends, in the third direction, of the battery monomer assembly correspondingly. The two opposite ends of the fixing piece in the third direction are connected with the end plates, and the second direction is the height direction. According to the battery device, the heat exchange part is suspended and fixed on the battery monomer assembly, so that the heat exchange part can be independently mounted or dismounted from the battery monomer assembly, when the heat exchange part needs to be maintained, the whole battery device does not need to be dismounted, and the maintenance cost and time are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery device and an electrical device. Background Art

[0002] In order to meet the heat exchange requirements of the battery device, a heat exchange fin is pasted on the side of the battery cell assembly. When the heat exchange fin has problems, it needs to be replaced. The heat exchange fin is adhesively fixed to the battery cell assembly. When replacing the heat exchange fin, glue is likely to remain on the battery cell assembly and it is not easy to replace. In addition, when the battery cell assembly is working, the battery cell assembly generates heat, which heats the adhesive. There are risks of the adhesive coming off and being ablated; at the same time, the battery cell assembly undergoes thermal expansion, which may cause the heat exchange member to fall off from the battery cell assembly. Summary of the Invention

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the present application is to provide a battery device, in which the heat exchange member is suspended and fixed on the battery cell assembly, facilitating the disassembly of the heat exchange member; and the heat exchange member is movably connected to the battery cell assembly, reducing the problem of extrusion damage caused by relative displacement between the heat exchange member and the battery cell assembly, improving the safety of the battery device, and thus extending the service life of the battery device.

[0004] The present application also provides an electrical device having the above battery device.

[0005] According to the battery device of the first aspect of the present application, there is a battery cell assembly; a heat exchange member disposed on a side of the battery cell assembly in a first direction; a fixing member located on one side of the heat exchange member in a second direction, the fixing member being used to connect the heat exchange member and the battery cell assembly. At least two suspension holes are provided at an end of the heat exchange member close to the fixing member, and a plurality of the suspension holes are arranged at intervals in a third direction. End plates are respectively provided at two ends of the battery cell assembly in the third direction, and opposite ends of the fixing member in the third direction are respectively connected to the end plates. The fixing member is connected to the heat exchange member through the suspension holes. The first direction, the second direction, and the third direction are perpendicular to each other pairwise, and the second direction is the height direction.

[0006] According to the battery device of the present application, the heat exchange member is suspended and fixed on the battery cell assembly, enabling the heat exchange member to be installed or disassembled independently of the battery cell assembly. When the heat exchange member needs to be repaired, there is no need to disassemble the entire battery device, reducing the maintenance cost and time; and the heat exchange member is movably connected to the battery cell assembly, reducing the problem of extrusion damage caused by relative displacement between the heat exchange member and the battery cell assembly, improving the safety of the battery device, and thus extending the service life of the battery device.

[0007] In some embodiments, the fixing member includes a fixing rod, the axis of the suspension hole extends along the third direction, the fixing rod passes through the suspension hole and is connected to the battery cell assembly.

[0008] In this embodiment, by arranging the fixing rod to be connected to the suspension hole in the second direction, the connection manner between the heat exchange member and the battery cell assembly can be made simple.

[0009] In some embodiments, the fixing member includes a fixing rod and a fixing buckle, the axis of the suspension hole extends along the first direction, one end of the fixing buckle passes through the suspension hole, and the other end is connected to the fixing rod, and the fixing rod is connected to the battery cell assembly.

[0010] In the embodiment, by arranging the fixing buckle to connect the fixing rod and the battery cell assembly, it is convenient for the fixing rod to connect the heat exchange member and the battery cell assembly.

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

[0012] In this embodiment, by arranging the fixing rod to be movably passed through the through hole, the fixing rod can move relative to the heat exchange member in the third direction to absorb the expansion amount of the battery cell assembly in the third direction.

[0013] In some embodiments, the fixing buckle includes a first buckle and a second buckle which are oppositely arranged, and the first buckle extends into the suspension hole and is connected to the second buckle.

[0014] In this embodiment, by arranging the fixing buckle to include a first buckle and a second buckle which are oppositely arranged, and the first buckle extends into the suspension hole and is connected to the second buckle, it is convenient for the fixing buckle to be connected to the heat exchange member.

[0015] In some embodiments, the heat exchange member has a plurality of protrusions extending towards the fixing member, and each protrusion has the suspension hole.

[0016] In this embodiment, by arranging a plurality of protrusions on the heat exchange plate, the structural strength of the heat exchange plate body can be avoided from being excessively weakened, and the space of the heat exchange plate body can also be not occupied, which is convenient for arranging a plurality of first heat exchange channels.

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

[0018] In this embodiment, by arranging the heat exchange element to be fixed to the second connecting member of the end plate through the first connecting member, and the first connecting member and the second connecting member are connected, the connection strength between the heat exchange element and the end plate can be increased, and the heat exchange efficiency and safety of the heat exchange element can also be improved, thereby improving the safety of the battery device.

[0019] In some embodiments, the first connecting member can move relative to the second connecting member along a third direction.

[0020] In this embodiment, by arranging the first connecting member and the second connecting member to move in the third direction, the heat exchange element can absorb the expansion amount of the battery cell assembly in the third direction.

[0021] In some embodiments, the first connecting member includes a first connecting hole, the second connecting member passes through the first connecting hole, and in the third direction, the size of the first connecting hole is larger than the size of the second connecting member.

[0022] In this embodiment, by arranging the second connecting member to pass through the first connecting hole, and in the third direction, the size of the first connecting hole is larger than the size of the second connecting member, the first connecting hole provides a moving space for the second connecting member in the third direction, so that the second connecting member can move along the third direction when installed in the first connecting hole.

[0023] In some embodiments, the second connecting member includes a first fastener detachably connected to the end plate, the first fastener passes through the first connecting hole, and is used to connect the heat exchange element and the end plate. By arranging the second connecting member to include the first fastener, and the first fastener is used to connect the heat exchange element and the end plate, the embodiment makes the installation method of the heat exchange element on the end plate simple, and also enables the first fastener to be movably connected to the first connecting hole.

[0024] In some embodiments, the fixing member is made of an elastic material, and the fixing member is connected between the suspension hole and the battery cell assembly.

[0025] In this embodiment, since the fixing member is made of an elastic material, when the battery cell assembly expands along the third direction, the fixing member can absorb the expansion amount of the battery cell assembly.

[0026] In some embodiments, the fixing member is movably passed through the suspension hole and is circumferentially fixed around the battery cell assembly.

[0027] In this embodiment, by movably passing the fixing member through the suspension hole and circumferentially fixing it around the battery cell assembly, the firmness of the fixing member fixing the heat exchange element can be increased.

[0028] In some embodiments, the fixing member includes a cable tie, and the cable tie is bundled around the circumference of the battery cell assembly.

[0029] In this embodiment, by bundling with a cable tie in the circumferential direction of the battery cell assembly, the cost of fixing the heat exchange member and the battery cell assembly can be relatively low.

[0030] In some embodiments, the fixing member further includes a fixing buckle. One end of the fixing buckle is connected to the suspension hole, and the other end is formed with a through hole through which the cable tie is threaded.

[0031] In this embodiment, by providing a fixing buckle which is used to connect the heat exchange member and the cable tie and is formed with a through hole, it is convenient to fix the heat exchange member with the cable tie.

[0032] In some embodiments, end plates are respectively provided at both ends of the battery cell assembly along a third direction, and third connectors are provided on the end plates; the heat exchange member is disposed on a side surface of the battery cell assembly in a first direction, and fourth connectors are provided at at least one end of the heat exchange member in the third direction. The third connector and the fourth connector are connected and can relatively move along the third direction, and the third direction is perpendicular to the first direction.

[0033] In this embodiment, by arranging the heat exchange member to be fixed to the third connector on the end plate through the fourth connector, and the third connector can be movably connected relative to the fourth connector in the third direction, the heat exchange member can not only absorb the expansion amount of the battery cell assembly in the third direction, but also increase the connection strength between the heat exchange member and the end plate, so as to improve the heat exchange efficiency and safety of the heat exchange member, and further improve the safety of the battery device.

[0034] In some embodiments, the fourth connector includes a second connection hole, the third connector is threaded through the second connection hole, and in the third direction, the size of the second connection hole is larger than that of the third connector.

[0035] In this embodiment, by arranging the third connector to be threaded through the second connection hole, and in the third direction, the size of the second connection hole is larger than that of the third connector, the second connection hole provides a moving space for the third connector in the third direction, so that the third connector can move along the third direction when installed in the second connection hole.

[0036] In some embodiments, the third connector includes a second fastener detachably connected to the end plate, and the second fastener is threaded through the second connection hole for connecting the heat exchange member and the end plate.

[0037] In this embodiment, by arranging the third connector to include a second fastener which is used to connect the heat exchange member and the end plate, the way of installing the heat exchange member to the end plate is simple, and the second fastener can also be movably connected with the second connection hole.

[0038] In some embodiments, the heat exchange member includes at least one heat exchange plate, the heat exchange plate includes side plates and two current collectors, the two current collectors are respectively connected to two ends of the side plate in the third direction, and the fourth connecting member is provided on the current collector.

[0039] In this embodiment, by providing that the heat exchange plate includes side plates and two current collectors, the current collectors are used to inject heat exchange medium into the side plates or converge the heat exchange medium from the side plates.

[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 this embodiment, by providing that two ends of the side plate in the third direction are respectively inserted into the slots of the corresponding current collectors, the connection area between the current collector and the side plate can be increased, and the sealing performance between the current collector and the side plate can be better.

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

[0043] In this embodiment, by providing that the plurality of fourth connecting members and the plurality of first heat exchange channels are arranged alternately in the second direction, the fourth connecting members can be avoided from the first heat exchange channels, and the risk of heat exchange medium leakage 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 is communicated with at least two of the second heat exchange channels.

[0045] In this embodiment, by providing that each first heat exchange channel is communicated with at least two of the second heat exchange channels, the current collector plays a role of shunting and confluence for the side plate.

[0046] In some embodiments, the first heat exchange channel is a V-shaped channel, two ends of the V-shaped channel in the third direction respectively have a first opening and a second opening, the size of the second opening is larger than the size 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 of the second heat exchange channels.

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

[0048] In some embodiments, the second opening has a first communication port and a second communication port, the first communication port and the second communication port are respectively communicated with two adjacent second heat exchange channels, and the flow-through areas of the first communication port and the second communication port are equal.

[0049] In this embodiment, by setting that the second opening has a first communication port and a second communication port and the flow-through areas of the first communication port and the second communication port are equal, the flow rate and flow velocity of the heat exchange medium in two adjacent second heat exchange channels can be made substantially the same, so that the heat exchange effects of multiple battery monomer assemblies are stable.

[0050] In some embodiments, the heat exchange member further includes: a flow dividing pipe and a guiding pipe. The flow dividing pipe is connected between the guiding pipe and the current collector. The flow dividing pipe includes a main pipe and a plurality of branch pipes communicated with the main pipe. The main pipe is communicated with the guiding pipe, and the branch pipes are communicated with the first heat exchange channels. The guiding pipe is a straight pipe or a bent pipe.

[0051] In this embodiment, by setting a flow dividing pipe and a guiding pipe, with the flow dividing pipe connected between the guiding pipe and the current collector for injecting or converging the heat exchange medium in the second heat exchange channels; and the guiding pipe being a straight pipe or a bent pipe, the direction of the guiding pipe can be adjusted according to the internal space of the battery device, saving the internal space of the battery device.

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

[0053] In this embodiment, by setting bumps to increase the connection area between the branch pipe and the current collector, the branch pipe and the current collector can be tightly joined, reducing the risk of heat exchange medium leakage.

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

[0055] In this embodiment, by providing an insulating coating on the outer side surface of the side plate, the insulation and voltage withstand requirements of the battery device can be met.

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

[0057] In this embodiment, by setting the current collector as an integrally formed rubber part, the current collector itself has elasticity and can absorb part of the expansion amount of the battery monomer assembly, so that the side plate is not easily affected by the expansion force of the battery monomer assembly and falls off.

[0058] In some embodiments, the heat exchange member includes a plurality of heat exchange plates, the heat exchange plates are arranged on the side surface of the battery monomer assembly in the first direction, and two adjacent heat exchange plates are communicated through a connecting pipe.

[0059] In this embodiment, by providing that the heat exchange member includes a plurality of heat exchange plates, and two adjacent heat exchange plates are communicated through a connecting pipe, it can adapt to different usage scenarios.

[0060] The electrical device according to the second aspect of the present application includes: the battery device according to the first aspect of the present application.

[0061] For the electrical device according to the present application, since the performance of the battery device is improved, it is beneficial to improve the working power performance of the electrical device.

[0062] The additional aspects and advantages of the present application will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0063] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where: Figure 1 is a schematic diagram of a vehicle according to some embodiments of the present application; Figure 2 is a schematic diagram of the cooperation between the heat exchange member and the battery cell assembly according to the first embodiment of the present application; Figure 3 is Figure 2 a top view of the cooperation between the heat exchange member and the battery cell assembly in ; Figure 4 is Figure 2 a side view of the cooperation between the heat exchange member and the battery cell assembly in ; Figure 5 is a schematic diagram of the heat exchange member according to the first embodiment of the present application; Figure 6 is Figure 5 a front view of the heat exchange member in ; Figure 7 is a schematic diagram of the cooperation between the heat exchange member and the battery cell assembly according to the second embodiment of the present application; Figure 8 is Figure 7 a top view of the cooperation between the heat exchange member and the battery cell assembly in ; Figure 9 is Figure 7 a side view of the cooperation between the heat exchange member and the battery cell assembly in ; Figure 10 is Figure 7 a side view of the cooperation between the heat exchange member and the battery cell assembly in in another direction; Figure 11 is a schematic diagram of the heat exchange member according to the second embodiment of the present application; Figure 12 is Figure 11 a top view of the heat exchange member in ; Figure 13 is Figure 11 a side view of the heat exchange member in it; Figure 14 is a schematic diagram of a heat exchange plate according to some embodiments of the present application.

[0064] Reference numerals: 100, vehicle; 101, battery device; 102, controller; 103, motor; 10, battery cell assembly; 11, end plate; 111, second fastener; 112, first fastener; 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 connection hole; 3, shunt pipe; 31, main pipe; 32, branch pipe; 321, convex block; 4, diversion pipe; 5, protrusion; 51, suspension hole; 61, fixing rod; 611, first connection hole; 62, fixing buckle; 7, connecting pipe. Detailed description of specific embodiments

[0065] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0066] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0067] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0068] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also constantly increasing.

[0069] In order to meet the heat exchange requirements of the battery device, a heat exchange fin is pasted on the side of the battery cell assembly. When the heat exchange fin has problems, the heat exchange fin needs to be replaced. The heat exchange fin is adhesively fixed to the battery cell assembly. When replacing the heat exchange fin, glue is likely to remain on the battery cell assembly and it is not easy to replace. In addition, when the battery cell assembly is working, the battery cell assembly generates heat, which heats the adhesive, and there is a risk of the adhesive coming off and being ablated; at the same time, the battery cell assembly undergoes thermal expansion, which may cause the heat exchange member to fall off from the battery cell assembly.

[0070] Based on the above considerations, the present application proposes a battery device, including a battery cell assembly, a heat exchange member, and a fixing member. The fixing member movably connects the heat exchange member and the battery cell assembly in a second direction. The heat exchange member is suspended and fixed on the battery cell assembly, so that the heat exchange member can be installed or disassembled independently of the battery cell assembly. When the heat exchange member needs to be repaired, there is no need to disassemble the entire battery device, reducing the maintenance cost and time; and the heat exchange member is movably connected to the battery cell assembly, reducing the problem of extrusion damage caused by relative displacement between the heat exchange member and the battery cell assembly, and extending the service life of the battery device. The battery device disclosed in the present application can be used in an electrical device using the battery device as a power source or various energy storage systems using the battery device as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spaceship, etc.

[0071] For the convenience of description, the following embodiments will take an electrical device in an embodiment of the present application, i.e., a vehicle 100, as an example for illustration. The vehicle 100 can be a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 101 is provided inside the vehicle 100, and the battery device 101 can be arranged at the bottom, head or 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 serve as the operating power source of the vehicle 100. The vehicle 100 may further include a controller 102 and a motor 103, and the controller 102 is used to control the battery device 101 to supply power to the motor 103, for example, for the working power requirements during the start, navigation and driving of the vehicle 100.

[0072] In some embodiments of the present application, the battery device 101 can not only serve as the operating power source of the vehicle 100, but also serve as the driving power source of the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0073] The battery device 101 includes a box body and a battery cell assembly 10. The box body itself forms a receiving cavity, and the battery cell assembly 10 is arranged in the receiving cavity. The box body includes a bottom guard plate, and the bottom guard plate is located at the bottom of the battery cell assembly 10. The box body is used to provide a receiving space for the battery cell assembly 10.

[0074] Exemplarily, in the battery device 101, the battery cell assembly 10 includes a plurality of battery cells. The plurality of battery cells can be connected in series, parallel or in a mixed connection. The mixed connection means that there are both series and parallel connections among the plurality of battery cells. The plurality of battery cells can be directly connected in series, parallel or in a mixed connection together, and then the battery cell assembly 10 composed of the plurality of battery cells is accommodated in the receiving cavity. Of course, the battery device 101 can also be in the form of a battery device 101 module formed by first connecting a plurality of battery cells in series, parallel or in a mixed connection, and then the plurality of battery cell modules are connected in series, parallel or in a mixed connection to form a whole and are accommodated in the receiving cavity. The battery device 101 may further include other structures. For example, the battery device 101 may further include a busbar component for realizing the electrical connection among the plurality of battery cells.

[0075] Among them, each battery cell can be a secondary battery or a primary battery; it 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 the shape of a flat body, a cuboid or other shapes, etc.

[0076] Figure 2 It is a schematic diagram of the heat exchange member 20 cooperating with the battery cell assembly 10 according to the first embodiment of the present application. Figure 3 It is Figure 2 The top view of the cooperation between the heat exchange member 20 and the battery cell assembly 10 in Figure 4 It is Figure 2Side view of the heat exchange member 20 cooperating with the battery cell assembly 10 Figure 5 Schematic diagram of the heat exchange member 20 according to the first embodiment of the present application Figure 6 is Figure 5 Front view of the heat exchange member 20 Figure 7 Schematic diagram 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 Top view of the heat exchange member 20 cooperating with the battery cell assembly 10 Figure 9 is Figure 7 Side view of the heat exchange member 20 cooperating with the battery cell assembly 10 Figure 10 is Figure 7 Side view of the heat exchange member 20 cooperating with the battery cell assembly 10 in another direction Figure 11 Schematic diagram of the heat exchange member 20 according to the second embodiment of the present application Figure 12 is Figure 11 Top view of the heat exchange member 20 Figure 13 is Figure 11 Side view of the heat exchange member 20 Figure 14 Schematic diagram of the heat exchange plate 2 according to some embodiments of the present application

[0077] The battery device 101 according to the first aspect of the present application includes: a battery cell assembly 10; a heat exchange member 20, the heat exchange member 20 is disposed on a side surface of the battery cell assembly 10 in a first direction, a fixing member is located on one side of the heat exchange member 20 in a second direction, the fixing member is used to connect the heat exchange member 20 and the battery cell assembly 10, at least two suspension holes 51 are provided at an end of the heat exchange member 20 close to the fixing member, the plurality of suspension holes 51 are arranged at intervals in a third direction, the fixing member is connected to the heat exchange member 20 through the suspension holes 51, end plates 11 are respectively provided at both ends of the battery cell assembly 10 in the third direction, and the fixing member is connected to the end plates 11 at opposite ends in the third direction.

[0078] The first direction, the second direction and the third direction are perpendicular to each other in pairs, and the second direction is the height direction.

[0079] In the present application, the first direction (refer to the Y direction in the attached drawing Figure 2 ) is the front-back direction, the second direction (refer to the Z direction in the attached drawing Figure 2 ) is the up-down direction, and the third direction (refer to the X direction in the attached drawing Figure 2 ) is the left-right direction.

[0080] Exemplarily, the battery cell assembly 10 may include one or more battery cells. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or in a combined series-parallel manner through a busbar component. The battery cell assembly 10 may be a battery module, and the battery module is formed by arranging and fixing multiple battery cells into an independent module. The heat exchanger 20 may be disposed on the side of a battery cell in the second direction, or the heat exchanger 20 may also be disposed on the side of a battery module in the second direction. The heat exchanger 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 may be an ethylene glycol aqueous solution, and the heat exchanger 20 is used to heat or cool the battery cell assembly 10.

[0081] Multiple battery cells may be stacked in sequence along the third direction, and end plates 11 are disposed at both ends of the multiple battery cells along the third direction for fixing the multiple battery cells; multiple battery cells may be stacked in sequence along the third direction to form a battery module, and end plates 11 are disposed at both ends of the battery module along the third direction for fixing the battery module.

[0082] There may be multiple heat exchangers 20, and the number of heat exchangers 20 may be equal to the number of battery modules. Heat exchangers 20 are disposed on both opposite sides of the battery module in the third direction.

[0083] The first direction is the front-back direction. The heat exchanger 20 may be disposed on the side of a battery cell in the front-back direction, or may also be disposed on the side of a battery module in the front-back direction. And the fixing member is located on one side of the heat exchanger 20 in the second direction. The second direction is the up-down direction, and the fixing member is located above the heat exchanger 20 for hanging and fixing the heat exchanger 20 to the battery cell assembly 10. The hanging-fixed heat exchanger 20 can be installed or disassembled independently of the battery cell assembly 10. When the heat exchanger 20 needs to be repaired, it is not necessary to disassemble the entire battery device 101, reducing the maintenance cost and time.

[0084] When the battery cell assembly 10 is working, thermal expansion will occur. The heat exchanger 20 is connected to the battery cell assembly 10 in a hanging-fixed manner, enabling the heat exchanger 20 to be movably connected to the battery cell assembly 10, which can release the stress generated during the expansion of the battery cell assembly 10, reduce the problem of extrusion damage caused by relative displacement between the heat exchanger 20 and the battery cell assembly 10, and extend the service life of the battery device 101.

[0085] One end of the heat exchanger 20 close to the fixing member has at least two hanging holes 51, and the multiple hanging holes 51 are arranged at intervals along the third direction. The heat exchanger 20 may be provided with two hanging holes 51, and the two hanging holes 51 are arranged at intervals along the third direction; the heat exchanger 20 may be provided with more than two hanging holes 51, and the more than two hanging holes 51 are arranged at intervals along the third direction. Fixing the fixing member and the heat exchanger 20 through at least two hanging holes 51 can increase the fixing strength between the heat exchanger 20 and the fixing member.

[0086] The end plate 11 provides an installation position for the fixing member. Both opposite ends of the fixing rod 61 in the third direction are connected to the end plate 11, which facilitates the installation of the fixing member. For example, the fixing member may include a fixing rod 61. The fixing rod 61 may be inserted through the suspension hole 51 and is movably connected to the heat exchange member 20 in the second direction. The fixing rod 61 may be made of an elastic material. When the battery cell assembly 10 expands, the fixing rod 61 expands synchronously, providing an expansion space for the expansion of the battery cell assembly 10.

[0087] For another example, the fixing member may include a cable tie. The cable tie may be inserted through the suspension hole 51 to bundle the heat exchange member 20 onto the battery cell assembly 10. The cable tie may be elastic. When the battery cell assembly 10 expands, the cable tie can expand synchronously, providing an expansion space for the expansion of the battery cell assembly 10.

[0088] According to the battery device 101 of the present application, the heat exchange member 20 is suspended and fixed on the battery cell assembly 10, such that the heat exchange member 20 can be installed or disassembled independently of the battery cell assembly 10. When the heat exchange member 20 needs to be repaired, it is not necessary to disassemble the entire battery device 101, reducing the maintenance cost and time; and the heat exchange member 20 is movably connected to the battery cell assembly 10, reducing the problem of extrusion damage caused by relative displacement between the heat exchange member 20 and the battery cell assembly 10, improving the safety of the battery device 101, and thus extending the service life of the battery device 101.

[0089] In some embodiments, as Figures 2 - 7 shown, the fixing member includes a fixing rod 61. The axis of the suspension hole 51 extends in the third direction. The fixing rod 61 is inserted through the suspension hole 51 and is connected to the battery cell assembly 10.

[0090] Exemplarily, the axis of the suspension hole 51 extends in the third direction. The fixing rod 61 may be inserted through the suspension hole 51 in the third direction. To fixedly connect the fixing rod 61 to the heat exchange member 20, it may be that the upper part of the fixing rod 61 is fixedly connected to the top of the battery device 101, or the two sides of the fixing rod 61 in the third direction are fixedly connected to the two sides of the battery cell assembly 10 in the third direction.

[0091] In this embodiment, by arranging the fixing rod 61 to be connected to the suspension hole 51 in the second direction, the connection manner between the heat exchange member 20 and the battery cell assembly 10 can be made simple.

[0092] In some embodiments, as Figures 2 - 7 shown, the fixing member includes a fixing rod 61 and a fixing buckle 62. The axis of the suspension hole 51 extends in the first direction. One end of the fixing buckle 62 is inserted 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.

[0093] Exemplarily, the axis of the suspension hole 51 extends in the first direction. By providing the fixing buckle 62, it is convenient to connect the fixing rod 61 to the suspension hole 51 of the heat exchange member 20.

[0094] For example, a plurality of fixing buckles 62 are provided, and the plurality of fixing buckles 62 are arranged at intervals in the third direction. The number of the fixing buckles 62 is equal to and corresponds to the number of the suspension holes one by one.

[0095] In this embodiment, by providing the fixing buckle 62 to connect the fixing rod 61 and the battery cell assembly 10, it is convenient to connect the fixing rod 61 to the heat exchange member 20 and the battery cell assembly 10.

[0096] In some embodiments, as Figures 2 - 7 shown, a through hole extending in the third direction is formed at one end of the fixing buckle 62 close to the fixing rod 61, and the fixing rod 61 is movably disposed through the through hole.

[0097] In this embodiment, by providing the fixing rod 61 to be movably disposed through the through hole, the fixing rod 61 can move relative to the heat exchange member in the third direction to absorb the expansion amount of the battery cell assembly 10 in the third direction.

[0098] In some embodiments, as Figures 2 - 7 shown, the fixing buckle 62 includes a first buckle and a second buckle which are oppositely arranged, and the first buckle extends into the suspension hole 51 and is connected to the second buckle.

[0099] Exemplarily, one end of the fixing buckle 62 is sleeved on the fixing rod 61, and the first buckle at the other end can extend into the suspension hole 51 and be connected to the second buckle, which is convenient for connecting the fixing buckle 62 to the heat exchange member 20.

[0100] In this embodiment, by providing the fixing buckle 62 to include a first buckle and a second buckle which are oppositely arranged, and the first buckle extends into the suspension hole 51 and is connected to the second buckle, it is convenient for connecting the fixing buckle 62 to the heat exchange member 20.

[0101] In some embodiments, the heat exchange member 20 has a plurality of protrusions 5 extending towards the fixing buckle 62, and the protrusions 5 have suspension holes 51.

[0102] The heat exchange member 20 has a plurality of protrusions 5 extending towards the fixing member, and the protrusions 5 have suspension holes 51. It can be that one protrusion 5 has one suspension hole 51, and there can be two protrusions 5. Correspondingly, there are also two suspension holes 51. It can also be that one protrusion 5 is provided with at least two suspension holes 51, and there are more than two protrusions 5. Correspondingly, there are also more than two suspension holes 51. By providing a plurality of protrusions 5 on the heat exchange member 30 and suspension holes 51 on the protrusions 5, the space of the main body of the heat exchange member 30 can be not occupied, and the structural strength of the heat exchange member 30 can be avoided from being weakened too much.

[0103] In this embodiment, by providing a plurality of protrusions 5 on the heat exchange plate 2, it is possible to avoid excessively weakening the structural strength of the heat exchange plate body, and it is also possible not to occupy the space of the heat exchange plate body, facilitating the arrangement of a plurality of first heat exchange channels 221.

[0104] In some embodiments, as Figures 2 - 7 shown, at least one end of the fixing member in the third direction is provided with a first connecting member, and the end plate 11 has a second connecting member, and the first connecting member and the second connecting member are connected.

[0105] Exemplarily, one end of the fixing member in the third direction is provided with a first connecting member, or both opposite ends of the fixing member in the third direction are provided with first connecting members. The first connecting member and the second 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, making it difficult for the heat exchange member 20 to fall off the end plate 11.

[0106] For example, the first connecting member can be a first connection hole 611 provided on the heat exchange member 20, and the second connecting member can be a buckle provided on the end plate 11, and the buckle can be located within the first connection hole 611.

[0107] In this embodiment, by providing the heat exchange member 20 fixed to the second connecting member of the end plate 11 through the first connecting member, and the first connecting member and the second connecting member are connected, it is possible to increase the connection strength between the heat exchange member 20 and the end plate 11, and also improve the heat exchange efficiency and safety of the heat exchange member 20, thereby improving the safety of the battery device 101.

[0108] In some embodiments, as Figures 2 - 7 shown, the first connecting member can move relative to the second connecting member in the third direction.

[0109] Exemplarily, the first connecting member and the second connecting member move in the third direction, which can absorb the expansion amount generated by the battery cell assembly 10 in the third direction. Through the movably connected first connecting member and second connecting member, the heat exchange member 20 can absorb the expansion amount of the battery cell 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 and safety of the heat exchange member 20, and further improving the safety of the battery device 101.

[0110] In this embodiment, by providing the first connecting member and the second connecting member to move in the third direction, the heat exchange member 20 can absorb the expansion amount of the battery cell assembly 10 in the third direction.

[0111] In some embodiments, as Figures 2 - 11As shown, the first connecting member includes a first connecting hole 611, the second connecting member is inserted through the first connecting hole 611, and in the third direction, the size of the first connecting hole 611 is larger than that of the second connecting member.

[0112] Exemplarily, in the third direction, the size of the first connecting hole 611 is larger than that of the second connecting member. The first connecting hole 611 provides a moving 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 into the first connecting hole 611.

[0113] For example, the second connecting member is a rivet provided on the end plate 11, the first connecting hole 611 is an elongated hole extending along the third direction. In the third direction, the diameter of the rivet is smaller than the length of the elongated hole, so that when the battery cell assembly 10 expands, the rivet can move along the third direction in the elongated hole.

[0114] In this embodiment, by setting that the second connecting member is inserted through the first connecting hole 611, and in the third direction, the size of the first connecting hole 611 is larger than that of the second connecting member, the first connecting hole 611 provides a moving 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 into the first connecting hole 611.

[0115] In some embodiments, as Figures 2 - 11 shown, the second connecting member includes a first fastener 112 detachably connected to the end plate 11. The first fastener 112 is inserted through the first connecting hole 611 and is used to connect the heat exchange member 20 to the end plate 11.

[0116] Exemplarily, the first fastener 112 can be a bolt. The bolt can be installed on the end plate 11 through the first connecting hole 611, making the installation method of the heat exchange member 20 on the end plate 11 simple, and also enabling the bolt to be movably connected with the first connecting hole 611. The heat exchange plate 2 and the end plate 11 can be connected by the first fastener 112, and the first fastener 112 can move along the third direction in the first connecting hole 611.

[0117] In this embodiment, by setting that the second connecting member includes the first fastener 112, and the first fastener 112 is used to connect the heat exchange member 20 to the end plate 11, the installation method of the heat exchange member 20 on the end plate 11 is simple, and also enables the first fastener 112 to be movably connected with the first connecting hole 611.

[0118] In some embodiments, the fixing member is made of an elastic material, and the fixing member is connected between the suspension hole 51 and the battery cell assembly 10.

[0119] Exemplarily, the fixing member is made of an elastic material and has elasticity itself. When the battery cell assembly 10 expands in the third direction, the fixing member can absorb the expansion amount of the battery cell assembly 10.

[0120] In this embodiment, by setting the fixing member to be made of an elastic material, when the battery cell assembly 10 expands in the third direction, the fixing member can absorb the expansion amount of the battery cell assembly 10.

[0121] In some embodiments, the fixing member is movably inserted through the suspension hole 51 and is circumferentially fixed around the battery cell assembly 10.

[0122] The fixing member is inserted through the through hole, so that the fixing member is not easily detached from the heat exchange member 20, and the firmness of the fixing member fixing the heat exchange member 20 can be increased.

[0123] In this embodiment, by movably inserting the fixing member through the suspension hole 51 and circumferentially fixing it around the battery cell assembly 10, the firmness of the fixing member fixing the heat exchange member 20 can be increased.

[0124] In some embodiments, the fixing member includes a cable tie, and the cable tie is bundled around the circumference of the battery cell assembly 10.

[0125] In this embodiment, by bundling the cable tie around the circumference of the battery cell assembly 10, the cost of fixing the heat exchange member 20 and the battery cell assembly 10 can be relatively low.

[0126] In some embodiments, the fixing member further includes a fixing buckle 62. One end of the fixing buckle 62 formed with a through hole is connected to the suspension hole 51, and the other end is formed with a through hole, and the cable tie is inserted through the through hole.

[0127] For example, a plurality of fixing buckles 62 are provided, and the plurality of fixing buckles 62 are arranged at intervals in the third direction.

[0128] In this embodiment, by providing the fixing buckle 62, the fixing buckle 62 is used to connect the cable tie and the heat exchange member 20, and the fixing buckle 62 is formed with a through hole, which can facilitate the fixing of the heat exchange member 20 by the cable tie.

[0129] In some embodiments, as Figures 2 - 7 shown, end plates 11 are respectively provided at both ends of the battery cell assembly 10 in the third direction, and third connectors are provided on the end plates 11; at least one end of the heat exchange member 20 in the third direction is provided with a fourth connector, and the third connector and the fourth connector are connected and can move relative to each other in the third direction, and the third direction is perpendicular to the first direction.

[0130] Exemplarily, when the battery cell assembly 10 is in operation, it expands along the third direction. In the related art, a heat exchanger 20 is pasted on the side surface of the battery cell assembly 10 in the first direction. When the battery cell assembly 10 is in operation, the battery cell assembly 10 generates heat, which heats the adhesive. There is a risk of the adhesive coming off and being ablated. Moreover, since the heat exchanger 20 is pasted on the side surface of the battery cell assembly 10, when the battery cell assembly 10 expands along the third direction, the expansion force of the battery cell assembly 10 may be greater than the fixing force of the heat exchanger 20, resulting in the heat exchanger 20 falling off the battery cell assembly 10.

[0131] In this application, the heat exchanger 20 is fixed to the end plate 11 by connecting a third connecting member and a fourth connecting member. The fourth connecting member is provided at one end of the heat exchanger 20 in the third direction, or the fourth connecting member is provided at both ends of the heat exchanger 20 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 generated by the battery cell assembly 10 in the third direction. In addition, connecting the third connecting member and the fourth connecting member to fix the heat exchanger 20 can increase the connection strength between the heat exchanger 20 and the end plate 11, making it difficult for the heat exchanger 20 to fall off the end plate 11. By the movable third connecting member and fourth connecting member, the heat exchanger 20 can absorb the expansion amount of the battery cell assembly 10 in the third direction, and can also increase the connection strength between the heat exchanger 20 and the end plate 11, thereby improving the heat exchange efficiency of the heat exchanger 20 and the safety of the heat exchanger 20, and further improving the safety of the battery device 101.

[0132] For example, the fourth connecting member can be a second connection hole 224 provided on the heat exchanger 20, and the third connecting member can be a buckle provided on the end plate 11. The buckle can be located within the second connection hole 224, and when the battery cell assembly 10 expands along the third direction, the buckle can move within the second connection hole 224 in the third direction.

[0133] According to the battery device 101 of the present application, the heat exchanger 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, so that the heat exchanger 20 can not only absorb the expansion amount of the battery cell assembly 10 in the third direction, but also increase the connection strength between the heat exchanger 20 and the end plate 11, so as to improve the heat exchange efficiency and safety of the heat exchanger 20, and further improve the safety of the battery device 101.

[0134] In some embodiments, as Figures 2 - 11 shown, the fourth connecting member includes a second connection hole 224, and the third connecting member passes through the second connection hole 224. In the third direction, the size of the second connection hole 224 is larger than the size of the third connecting member.

[0135] Exemplarily, in the third direction, the size of the second connection hole 224 is larger than the size of the third connection member. The second connection hole 224 provides a moving space for the third connection member in the third direction, so that when the third connection member is installed into the second connection hole 224, it can move along the third direction.

[0136] For example, the third connection member is a rivet provided on the end plate 11, and the second connection hole 224 is an oblong hole extending along the third direction. In the third direction, the diameter of the rivet is smaller than the length of the oblong hole, so that when the battery cell assembly 10 expands along the third direction, the rivet can move along the third direction in the oblong hole.

[0137] In this embodiment, by arranging the third connection member to pass through the second connection hole 224, in the third direction, the size of the second connection hole 224 is larger than the size of the third connection member. The second connection hole 224 provides a moving space for the third connection member in the third direction, so that when the third connection member is installed into the second connection hole 224, it can move along the third direction.

[0138] In some embodiments, as Figures 2 - 11 shown, the third connection member 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 exchange member 20 and the end plate 11.

[0139] Exemplarily, the second fastener 111 can be a bolt. The bolt can be installed on the end plate 11 through the second connection hole 224, making the way to install the heat exchange member 20 on the end plate 11 simple, and also enabling the bolt to be movably connected to the second connection hole 224. The heat exchange plate 2 and the end plate 11 can be connected through the second fastener 111, and the second fastener 111 can move along the third direction in the second connection hole 224.

[0140] In this embodiment, by arranging the third connection member to include the second fastener 111, and the second fastener 111 is used to connect the heat exchange member 20 and the end plate 11, the way to install the heat exchange member 20 on the end plate 11 is simple, and the second fastener 111 can also be movably connected to the second connection hole 224.

[0141] In some embodiments, as Figures 2 - 11 shown, 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 both ends of the side plate 21 in the third direction, and the current collector 22 is provided with a fourth connection member.

[0142] Exemplarily, the heat exchange member 20 may include a heat exchange plate 2, or the heat exchange member 20 may include a plurality of heat exchange plates 2, and each heat exchange plate 2 is disposed on the side surface of the battery cell assembly 10 in the first direction. For example, the heat exchange member 20 may include two heat exchange plates 2, and the two heat exchange plates 2 may be respectively located on opposite sides of the battery cell assembly 10 in the first direction.

[0143] Two current collectors 22 are located at both ends of the side plate 21 in the third direction. Fourth connectors are provided on both of the two current collectors 22 for increasing the connection strength between the heat exchange member 20 and the end plate 11. The side plate 21 is disposed on the side surface of the battery cell assembly 10 in the first direction, and the current collectors 22 are disposed on both sides of the end plate 11 in the first direction. The current collectors 22 are used to inject heat exchange medium into the side plate 21 or to converge the heat exchange medium from the side plate 21.

[0144] In this embodiment, by providing that the heat exchange plate 2 includes a side plate 21 and two current collectors 22, the current collectors 22 are used to inject heat exchange medium into the side plate 21 or to converge the heat exchange medium from the side plate 21.

[0145] In some embodiments, as Figures 2 - 11 shown, the current collector 22 has a slot opening towards the side plate 21, and the end of the side plate 21 in the third direction is inserted into the slot.

[0146] Exemplarily, the two ends of the side plate 21 in the third direction are respectively inserted into the corresponding slots, which can increase the connection area between the current collector 22 and the side plate 21, and make the sealing performance between the current collector 22 and the side plate 21 better, and can reduce the risk of leakage of the heat exchange medium from the connection between the current collector 22 and the side plate 21.

[0147] In this embodiment, by providing that the two ends of the side plate 21 in the third direction are respectively inserted into the slots of the corresponding current collectors 22, the connection area between the current collector 22 and the side plate 21 can be increased, and the sealing performance between the current collector 22 and the side plate 21 can be made better.

[0148] In some embodiments, as Figure 14 shown, the current collector 22 has a plurality of first heat exchange channels 221, and there are a plurality of fourth connectors. The plurality of fourth connectors and the plurality of first heat exchange channels 221 are arranged staggered in the second direction, and the third direction, the first direction and the second direction are perpendicular to each other in pairs.

[0149] Exemplarily, a plurality of fourth connectors are provided on each current collector 22, so that there are a plurality of fastening points between the current collector 22 and the end plate 11 for increasing the connection strength between the current collector 22 and the end plate 11. The plurality of fourth connectors and the plurality of first heat exchange channels 221 are arranged staggered in the second direction, which can make the fourth connectors avoid the first heat exchange channels 221 and reduce the risk of leakage of the heat exchange medium from the first heat exchange channels 221.

[0150] In this embodiment, by arranging a plurality of fourth connecting members and a plurality of first heat exchange channels 221 in a staggered manner along the second direction, the fourth connecting members can be avoided from the first heat exchange channels 221, reducing the risk of leakage of the heat exchange medium from the first heat exchange channels 221.

[0151] In some embodiments, as Figure 14 shown, the side plate 21 has a plurality of second heat exchange channels 211, and each first heat exchange channel 221 is communicated with at least two second heat exchange channels 211.

[0152] Exemplarily, each first heat exchange channel 221 is communicated with two second heat exchange channels 211, or each first heat exchange channel 221 is communicated with more than two second heat exchange channels 211. Each first heat exchange channel 221 is communicated with at least two second heat exchange channels 211, enabling the current collector 22 to play a role in shunting and merging the side plate 21. One current collector 22 shunts the heat exchange medium into the side plate 21, and the other current collector 22 is used to merge the heat exchange medium in the side plate 21.

[0153] A plurality of second heat exchange channels 211 in the side plate 21 all extend along the third direction, enabling the heat exchange medium to be evenly distributed in the side plate 21, so that the heat exchange temperatures and heat exchange efficiencies at various parts of the side plate 21 are substantially the same, improving the heat exchange effect of the battery cell assembly 10.

[0154] For example, the current collector 22 has two first heat exchange channels 221, the side plate 21 has four second heat exchange channels 211, and 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 merge into one first heat exchange channel 221.

[0155] In this embodiment, by arranging each first heat exchange channel 221 to be communicated with at least two second heat exchange channels 211, the current collector 22 plays a role in shunting and merging the side plate 21.

[0156] In some embodiments, as Figure 14 shown, the first heat exchange channel 221 is a V-shaped channel. The two ends of the V-shaped channel along the third direction respectively have a first opening 222 and a second opening 223. The size of the second opening 223 is larger 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 faces at least two second heat exchange channels 211.

[0157] Exemplarily, the second opening 223 may face two second heat exchange channels 211, or the second opening 223 may face more than two second heat exchange channels 211. The size of the second opening 223 is larger than that of the first opening 222, enabling the second opening 223 to face at least two second heat exchange channels 211, injecting the heat exchange medium in one first heat exchange channel 221 into at least two second heat exchange channels 211, and also merging the heat exchange media in at least two second heat exchange channels 211 into one first heat exchange channel 221.

[0158] In this embodiment, by setting the size of the second opening 223 to be larger than that of the first opening 222, the second opening 223 can face at least two second heat exchange channels 211, injecting the heat exchange medium in one first heat exchange channel 221 into at least two second heat exchange channels 211, and also merging the heat exchange media in at least two second heat exchange channels 211 into one first heat exchange channel 221.

[0159] In some embodiments, as Figure 14 shown, the second opening 223 has a first communication port 2231 and a second communication port 2232. The first communication port 2231 and the second communication port 2232 are respectively connected to two adjacent second heat exchange channels 211, and the flow-through areas of the first communication port 2231 and the second communication port 2232 are equal.

[0160] Exemplarily, 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. The flow-through areas of the first communication port 2231 and the second communication port 2232 are equal, enabling the flow rates and flow velocities of the heat exchange media in two adjacent second heat exchange channels 211 to be substantially the same, making the heat exchange effects of multiple battery cell assemblies 10 stable.

[0161] In this embodiment, by setting the second opening 223 to have the first communication port 2231 and the second communication port 2232, and the flow-through areas of the first communication port 2231 and the second communication port 2232 being equal, the flow rates and flow velocities of the heat exchange media in two adjacent second heat exchange channels 211 can be substantially the same, making the heat exchange effects of multiple battery cell assemblies 10 stable.

[0162] In some embodiments, as Figures 2 - 11 shown, the heat exchange member 20 further includes a flow dividing pipe 3 and a flow guiding pipe 4. The flow dividing pipe 3 is connected between the flow guiding pipe 4 and the current collector 22. The flow dividing pipe 3 includes a main pipe 31 and a plurality of branch pipes 32 communicating with the main pipe 31. The main pipe 31 communicates with the flow guiding pipe 4, and the branch pipes 32 communicate with the first heat exchange channels 221. The flow guiding pipe 4 is a straight pipe or a bent pipe.

[0163] Exemplarily, the shunt pipe 3 can be the main water inlet pipe of the battery device 101. The shunt pipe 3 is disposed adjacent to the current collector 22. The shunt pipe 3 diverts the heat exchange medium in the diversion pipe 4 to different first heat exchange channels 221. There are shunt pipes 3 communicated with both current collectors 22 of the heat exchanger 20, and diversion pipes 4 are connected to the other ends of the shunt pipes 3.

[0164] The heat exchange medium in the diversion pipe 4 at the water inlet end flows through the main pipe 31 into a plurality of branch pipes 32, and flows through the plurality of branch pipes 32 into the first heat exchange channel 221, and then flows through the first heat exchange channel 221 into the second heat exchange channel 211. After the battery cell assembly 10 is heated, the heat exchange medium in the second heat exchange channel 211 flows into the current collector 22 at the water outlet end, flows through the first heat exchange channel 221 into a plurality of branch pipes 32, and then converges into the main pipe 31 through the plurality of branch pipes 32, and then flows through the main pipe 31 into the diversion pipe 4 to complete a flow cycle of the heat exchange medium in the heat exchanger 20.

[0165] The diversion pipe 4 is a straight pipe or a bent pipe, and the orientation of the diversion pipe 4 can be adjusted according to the internal space of the battery device 101, saving the internal space of the battery device 101 and improving the overall energy density of the battery device 101.

[0166] For example, the shunt pipe 3 can be a tee pipe.

[0167] In a specific example, both the diversion pipe 4 and the shunt pipe 3 are made of nylon material, and the shunt pipe 3 and the current collector 22 are integrally pressed by a hot pressing process.

[0168] In this embodiment, by providing the shunt pipe 3 and the diversion pipe 4, the shunt pipe 3 is connected between the diversion pipe 4 and the current collector 22 for injecting or converging the heat exchange medium in the second heat exchange channel 211; the diversion pipe 4 is a straight pipe or a bent pipe, and the orientation of the diversion pipe 4 is adjusted according to the internal space of the battery device 101, saving the internal space of the battery device 101.

[0169] In some embodiments, as Figures 2 - 7 shown, each branch pipe 32 has two bumps 321 extending towards the current collector 22, and the two bumps 321 are respectively located on opposite sides of the current collector 22 in the first direction.

[0170] In this embodiment, by providing the bumps 321, the connection area between the branch pipe 32 and the current collector 22 is increased, so that the branch pipe 32 and the current collector 22 can be tightly joined, reducing the risk of heat exchange medium leakage.

[0171] In some embodiments, as Figures 2 - 7 shown, the outer side surface of the side plate 21 is provided with an insulating coating.

[0172] In this embodiment, by providing an insulating coating on the outer side surface of the side plate 21, the insulation withstand voltage requirements of the battery device 101 can be met.

[0173] In some embodiments, as Figures 2 - 7 shown, the current collector 22 is an integrally formed rubber part.

[0174] Exemplarily, both ends of the side plate 21 in the third direction are respectively inserted into the slots of the current collector 22. The current collector 22 is an integrally formed rubber part. The side plate 21 and the current collector 22 can be joined by a vulcanization process, which can reduce the risk of the heat exchange medium leaking from the connection between the current collector 22 and the side plate 21, so as to meet the insulation withstand voltage requirements of the battery device 101.

[0175] The current collector 22 being a rubber part endows the current collector 22 with elasticity itself, which can absorb part of the expansion amount of the battery cell assembly 10, so that the side plate 21 is not easily affected by the expansion force of the battery cell assembly 10 and fall off.

[0176] In this embodiment, by providing the fluid as an integrally formed rubber part, the current collector 22 has elasticity itself, which can absorb part of the expansion amount of the battery cell assembly 10, so that the side plate 21 is not easily affected by the expansion force of the battery cell assembly 10 and fall off.

[0177] In some embodiments, as Figures 7 - 13 shown, the heat exchange member 20 includes a plurality of heat exchange plates 2. The heat exchange plates 2 are arranged on the side surface of the battery cell assembly 10 in the first direction, and two adjacent heat exchange plates 2 are communicated through a connecting pipe 7.

[0178] Exemplarily, according to actual requirements, the heat exchange member 20 includes a plurality of heat exchange plates 2 to adapt to different usage scenarios.

[0179] Two adjacent heat exchange plates 2 are communicated through a connecting pipe 7, and the heat exchange medium can circulate between all the heat exchange plates 2, achieving a more uniform temperature distribution among multiple battery cell assemblies 10 and reducing the phenomenon of local overheating.

[0180] 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.

[0181] In this embodiment, by providing the heat exchange member 20 with a plurality of heat exchange plates 2, and two adjacent heat exchange plates 2 being communicated through a connecting pipe 7, it can adapt to different usage scenarios.

[0182] The electrical device according to the second aspect of the present application includes: the battery device 101 of the first aspect of the present application.

[0183] For the electrical device according to the present application, since the performance of the battery device 101 is improved, it is beneficial to improve the working power performance of the electrical device.

[0184] Next, reference will be made to Figures 1 - 14 describe the battery device 101 according to a specific embodiment of the present application.

[0185] The battery device 101 includes a battery cell assembly 10, a heat exchanger 20, and a fixing rod 61. The battery cell assembly 10 may include a plurality of battery modules. End plates 11 are respectively provided at both ends of the battery cell assembly 10 in the third direction. The fixing rod 61 is located on one side of the heat exchanger 20 in the second direction. The fixing rod 61 is used to connect the heat exchanger 20 and the battery cell assembly 10. First connection holes 611 are provided at both ends of the fixing rod 61 in the third direction. The end plate 11 is provided with a first fastener 112 that is detachably connected to the end plate 11. The first fastener 112 passes through the first connection hole 611. In the third direction, the size of the first connection hole 611 is larger than the size of the first fastener 112.

[0186] The heat exchanger 20 and the fixing rod 61 are connected by a fixing buckle 62. One end of the fixing buckle 62 is sleeved on the fixing rod 61, and the other end includes a first buckle and a second buckle arranged opposite to each other. The heat exchange plate 2 has a plurality of protrusions 5 extending towards the fixing buckle 62. The protrusions 5 have hanging holes 51. The first buckle extends into the hanging hole 51 and is connected to the second buckle.

[0187] The end plate 11 is provided with a second fastener 111 that is detachably connected to the end plate 11. A plurality of heat exchangers 20 may be provided. Each heat exchanger 20 is disposed on the side surface of the battery module in the first direction. The heat exchanger 20 includes a heat exchange plate 2. The heat exchange plate 2 includes side plates 21 and two current collectors 22. The two current collectors 22 are respectively connected to both ends of the side plates 21 in the third direction. An insulating coating is provided on the outer side surface of the side plates 21. The current collector 22 is provided with a second connection hole 224. The second fastener 111 passes through the second connection hole 224. In the third direction, the size of the second connection hole 224 is larger than the size of the second fastener 111.

[0188] The current collector 22 has a slot opening towards the side plate 21. The end portion of the side plate 21 in the third direction is inserted into the slot. The current collector 22 is an integrally formed rubber part. The current collector 22 and the side plate 21 are joined by a vulcanization process. The current collector 22 has two first heat exchange channels 221. A plurality of second connection holes 224 are provided. The plurality of second connection holes 224 and the plurality of first heat exchange channels 221 are arranged alternately in the second direction. The side plate 21 has four second heat exchange channels 211. Each first heat exchange channel 221 is communicated with two second heat exchange channels 211.

[0189] The first heat exchange flow channel 221 is a V-shaped flow channel. The two ends of the V-shaped flow channel along the third direction respectively have a first opening 222 and a second opening 223. The size of the second opening 223 is larger than that of the first opening 222. The second opening 223 is arranged close to the second heat exchange flow channel 211, and the second opening 223 faces two second heat exchange flow channels 211. The second opening 223 has a first communication port 2231 and a second communication port 2232. The first communication port 2231 and the second communication port 2232 are respectively communicated with two adjacent second heat exchange flow channels 211, and the flow areas of the first communication port 2231 and the second communication port 2232 are equal.

[0190] The heat exchange member 20 further includes a flow dividing pipe 3 and a diversion pipe 4. The flow dividing pipe 3 is connected between the diversion pipe 4 and the current collector 22. The flow dividing pipe 3 includes 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 diversion pipe 4, and the branch pipes 32 are communicated with the first heat exchange flow channel 221. The diversion pipe 4 is a straight pipe or a bent pipe. Each branch pipe 32 has two bumps 321 extending towards the current collector 22, and the two bumps 321 are respectively located on opposite sides of the current collector 22 in the first direction.

[0191] Embodiment 1 A plurality of heat exchange members 20 are provided. Each heat exchange member 20 includes a heat exchange plate 2, and a heat exchange plate 2 is located on the side surface of the battery module in the first direction.

[0192] Embodiment 2 A plurality of heat exchange members 20 are provided. Each heat exchange member 20 includes a plurality of heat exchange plates 2. The plurality of heat exchange plates 2 of one heat exchange member 20 are respectively located on opposite side surfaces of the battery module in the first direction.

[0193] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "optionally", "further", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0194] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device (101), characterized in that, Comprising: A battery cell assembly (10); A heat exchanger (20), the heat exchanger (20) being arranged on a side surface of the battery cell assembly (10) in a first direction; A fixing member, the fixing member being located on one side of the heat exchanger (20) in a second direction, the fixing member being used for connecting the heat exchanger (20) and the battery cell assembly (10), at least two suspension holes (51) being provided at one end of the heat exchanger (20) close to the fixing member, a plurality of the suspension holes (51) being arranged at intervals in a third direction, the fixing member being connected to the heat exchanger (20) through the suspension holes (51), end plates (11) being respectively arranged at both ends of the battery cell assembly (10) in the third direction, and both opposite ends of the fixing member in the third direction being connected to the end plates (11), the first direction, the second direction and the third direction being perpendicular to each other pairwise, and the second direction being the height 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 in the third direction, the fixing rod (61) is inserted 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 member includes a fixing rod (61) and a fixing buckle (62), the axis of the suspension hole (51) extends in the first direction, one end of the fixing buckle (62) is inserted through the suspension hole (51), and the other end is connected to the fixing rod (61), and the fixing rod (61) is connected to the battery cell assembly (10).

4. The battery device (101) according to claim 3, characterized in that, An through hole extending in the third direction is formed at one end of the fixing buckle (62) close to 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 which are arranged oppositely, and the first buckle extends into the suspension hole (51) and is 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 towards the fixing member, and each protrusion (5) has the suspension hole (51).

7. The battery device (101) according to claim 1, characterized in that, At least one end of the fixing member in the third direction is provided with a first connecting member, the end plate (11) has a second connecting member, and the first connecting member and the second connecting member are connected.

8. The battery device (101) according to claim 7, characterized in that, The first connecting member can move relative to the second connecting member along the third direction.

9. The battery device (101) according to claim 8, characterized in that, The first connecting member includes a first connecting hole (611), the second connecting member is inserted through the first connecting hole (611), and in the third direction, the size of the first connecting hole (611) is larger than the size of the second connecting member.

10. The battery device (101) according to claim 9, characterized in that, The second connecting member includes a first fastener (112) detachably connected to the end plate (11), and the first fastener (112) is inserted through the first connecting hole (611) for connecting the heat exchanger (20) and the end plate (11).

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

12. The battery device (101) according to claim 11, characterized in that, The fixing member is movably inserted through the suspension hole (51) and is fixed around the circumference of the battery cell assembly (10).

13. The battery device (101) according to claim 11, characterized in that, The fixing member includes a cable tie, and the cable tie is bundled around the circumference of the battery cell assembly (10).

14. The battery device (101) according to claim 13, characterized in that, The fixing member further includes a fixing buckle (62). One end of the fixing buckle (62) is connected to the suspension hole (51), and the other end is formed with a through hole through which the cable tie is inserted.

15. The battery device (101) according to claim 1, characterized in that, End plates (11) are respectively arranged at both ends of the battery cell assembly (10) along the third direction. Third connectors are provided on the end plates (11). Fourth connectors are provided at at least one end of the heat exchange member (20) in the third direction. The third connectors and the fourth connectors are connected and can move relative to each other in the third direction.

16. The battery device (101) according to claim 15, characterized in that, The fourth connector includes a second connection hole (224). The third connector is inserted through the second connection hole (224). In the third direction, the size of the second connection hole (224) is larger than the size of the third connector.

17. The battery device (101) according to claim 16, characterized in that, The third connector includes a second fastener (111) detachably connected to the end plate (11). The second fastener (111) is inserted through the second connection hole (224) for connecting the heat exchange member (20) and the end plate (11).

18. The battery device (101) according to claim 15, characterized in that, 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 both ends of the side plate (21) in the third direction, and the fourth connectors are provided on the current collectors (22).

19. The battery device (101) according to claim 18, characterized in that, The current collector (22) has a slot opening towards the side plate (21), and the end of the side plate (21) in the third direction is inserted into the slot.

20. The battery device (101) according to claim 18, characterized in that, The current collector (22) has a plurality of first heat exchange channels (221). A plurality of the fourth connectors are provided, and the plurality of fourth connectors and the plurality of first heat exchange channels (221) are arranged in a staggered manner along the second direction.

21. The battery device (101) according to claim 20, characterized in that, The side plate (21) has a plurality of second heat exchange channels (211), and each of the first heat exchange channels (221) is communicated with at least two of the second heat exchange channels (211).

22. The battery device (101) according to claim 21, characterized in that The first heat exchange channel (221) is a V-shaped channel. The two ends of the V-shaped channel in the third direction respectively have a first opening (222) and a second opening (223). The size of the second opening (223) is larger than the size of the first opening (222). The second opening (223) is arranged close to the second heat exchange channel (211), and the second opening (223) faces at least two of the second heat exchange channels (211).

23. The battery device (101) according to claim 22, characterized in that, The second opening (223) has a first communication port (2231) and a second communication port (2232). The first communication port (2231) and the second communication port (2232) 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.

24. The battery device (101) according to claim 21, characterized in that, The heat exchange member (20) further includes: a flow dividing pipe (3) and a flow guiding pipe (4). The flow dividing pipe (3) is connected between the flow guiding pipe (4) and the current collector (22). The flow dividing pipe (3) includes a main pipe (31) and a plurality of branch pipes (32) communicating with the main pipe (31). The main pipe (31) communicates with the flow guiding pipe (4), and the branch pipes (32) communicate with the first heat exchange flow channel (221). The flow guiding pipe (4) is a straight pipe or a bent pipe.

25. The battery device (101) according to claim 24, characterized in that, Each of the branch pipes (32) has two bumps (321) extending towards the current collector (22), and the two bumps (321) are respectively located on opposite sides of the current collector (22) in the first direction.

26. The battery device (101) according to claim 18, characterized in that, An insulating coating is provided on the outer side surface of the side plate (21).

27. The battery device (101) according to claim 18, characterized in that, The current collector (22) is an integrally formed rubber part.

28. The battery device (101) according to claim 1, characterized in that, The heat exchange member (20) includes a plurality of heat exchange plates (2). The heat exchange plates (2) are arranged on the side surface of the battery cell assembly (10) in the first direction, and two adjacent heat exchange plates (2) are communicated through a connecting pipe (7).

29. An electrical device, characterized in that, Including: The battery device (101) according to any one of claims 1-28.

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