Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and relates to the technical field of batteries, the battery device comprises a plurality of battery monomers, a heat exchange structure and a busbar, the plurality of battery monomers are sequentially arranged along a first direction, the heat exchange structure is located at the same side of the plurality of battery monomers along a second direction, and the heat exchange structure is in heat exchange fit with the plurality of battery monomers, in the third direction, at least one side of the heat exchange structure is provided with a busbar, the busbar is connected with two adjacent battery monomers so as to enable the two adjacent battery monomers to be electrically connected, a bent part is formed at the end, facing the heat exchange structure, of the busbar so as to enable the busbar and the heat exchange structure to be separated, and the first direction, the second direction and the third direction are perpendicular to one another. According to the battery device provided by the embodiment of the invention, the bent part is formed on the busbar, so that the risk of short circuit between the busbar and the heat exchange structure can be reduced, and the reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device having the battery device. Background Art

[0002] In the related art, a busbar is provided in the battery device, and multiple battery cells of the battery device are electrically connected through the busbar. A heat exchange structure is also provided in the battery device, and the heat exchange structure and the busbar are arranged adjacent to each other. The gap between the heat exchange structure and the busbar in the existing battery device is small, and the heat exchange structure and the busbar are easy to contact, and there is a greater risk of short circuit between the heat exchange structure and the busbar. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a battery device, which can separate the busbar and the heat exchange structure by providing a busbar with a bent portion, thereby reducing the risk of short circuit between the busbar and the heat exchange structure, which is conducive to improving the reliability of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, comprising: a plurality of battery cells, a heat exchange structure and a bus, wherein the plurality of battery cells are arranged in sequence along a first direction, along a second direction, the heat exchange structure is located on the same side of the plurality of battery cells, the heat exchange structure cooperates with the plurality of battery cells for heat exchange, along a third direction, a bus is provided on at least one side of the heat exchange structure, the bus connects two adjacent battery cells so that the two adjacent battery cells are electrically connected, a bending portion is formed at the end of the bus facing the heat exchange structure so as to separate the bus and the heat exchange structure, and the first direction, the second direction and the third direction are perpendicular to each other.

[0005] In the above technical solution, the busbar is provided with a bent portion, which is beneficial to increasing the gap between the busbar and the heat exchange structure, and can reduce the risk of short circuit between the busbar and the heat exchange structure, which is beneficial to improving the reliability of the battery device.

[0006] In some embodiments, along the second direction, the bent portion bends in a direction away from the battery cell.

[0007] In the above technical solution, by arranging the bending portion to bend along the second direction toward the direction away from the battery cell, the busbar can be easily installed and the difficulty of assembling the battery device can be reduced.

[0008] In some embodiments, the busbar includes: a busbar body and a bending portion, the busbar body is connected to the electrode poles of two corresponding adjacent battery cells, and along the third direction, the end of the busbar body facing the heat exchange structure is connected to the bending portion.

[0009] In the above technical solution, two adjacent battery cells are connected by a bus body, and a bending portion is connected to the end of the bus body along the third direction toward the heat exchange structure, so that the battery device structure is compact, which is beneficial to improving the space utilization inside the battery device.

[0010] In some embodiments, the bending portion includes: a first bending section, the first bending section is bent and connected to the busbar body, and the first bending section is located on a side of the busbar body away from the battery cell.

[0011] In the above technical solution, by setting the first bending section, the bus and the heat exchange structure can be separated, which is beneficial to increase the gap between the heat exchange structure and the bus, reduce the risk of short circuit between the heat exchange structure and the bus, and improve the reliability of the battery device.

[0012] In some embodiments, the bending portion further includes: a second bending section, the first bending section is connected between the second bending section and the busbar body, and the second bending section is connected to the first bending section in a bending manner.

[0013] In the above technical solution, by setting a second bending section, the surface area of ​​the bus can be increased, which is beneficial to improving the heat dissipation performance of the bus. It can also reduce the probability of stress concentration, which is beneficial to extending the service life of the bus. It can also increase the spacing distance between the bus and the heat exchange structure, and reduce the risk of short circuit between the bus and the heat exchange structure.

[0014] In some embodiments, along the third direction, the second bending section is located on a side of the first bending section away from the heat exchange structure.

[0015] In the above technical solution, the probability of contact between the busbar and the heat exchange structure can be reduced, so that the busbar and the heat exchange structure are reliably separated, which is beneficial to improving the reliability of the battery device.

[0016] In some embodiments, the second bending segment and the busbar body are spaced apart along the second direction.

[0017] In the above technical solution, by arranging the second bending section and the bus body to be spaced apart along the second direction, the heat dissipation effect of the bus can be improved, which helps to maintain the performance of the battery cell in a high temperature environment.

[0018] In some embodiments, the second bending segment is parallel to the busbar body.

[0019] In the above technical solution, by setting the second bending section parallel to the bus body, the structural strength and stability of the bus can be improved, the risk of deformation and breakage of the bus can be reduced, and the safe and reliable power transmission can be ensured. The structure of the bus is neat and standardized, which is convenient for staff to install and inspect the bus.

[0020] In some embodiments, the first bending section is perpendicular to the third direction, and the second bending section and the busbar body are both perpendicular to the second direction.

[0021] In the above technical solution, the vertical design can improve the structural rigidity of the bus. When the battery device is subjected to external forces such as vibration and impact, the impact force can be transmitted more evenly, local stress concentration can be reduced, and the risk of deformation such as bending and twisting of the bus can be reduced, which is beneficial to improving the reliability of the bus and the reliability of the battery device.

[0022] In some embodiments, there may be multiple bus bars, which form two bus bar arrangements. Along the third direction, each bus bar arrangement is located on both sides of the heat exchange structure. Both bus bar arrangements include multiple bus bars, and the multiple bus bars in each bus bar arrangement are arranged sequentially along the first direction.

[0023] In the above technical solution, by arranging two busbars on both sides of the heat exchange structure, the connection strength of two adjacent battery cells can be improved, the reliability of the battery cells can be improved, and the service life of the battery device can be extended.

[0024] In some embodiments, any two adjacent bus bars in each column of bus bars are spaced apart.

[0025] The above technical solution is beneficial to improving the reliability of the bus bar and further improving the reliability of the battery device.

[0026] In a second aspect, an embodiment of the present application further provides an electrical device, including the battery device in the above embodiment.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0030] Figure 2 A schematic diagram of connecting multiple battery cells provided in some embodiments of the present application;

[0031] Figure 3 A schematic diagram of a battery cell provided for some embodiments of the present application.

[0032] Reference numerals:

[0033] The electric device 100,

[0034] Battery device 110,

[0035] Battery cell 10, electrode pole 11,

[0036] Heat exchange structure 20,

[0037] busbar 30, busbar body 31, bending portion 32, first bending section 321, second bending section 322,

[0038] Controller 120 , electric motor 130 . DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0041] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0044] The term “plurality” used in this application refers to two or more (including two).

[0045] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0046] The battery device mentioned in the embodiments of the present application refers to a single physical module including multiple battery cells to provide higher voltage and capacity. For example, the battery device mentioned in the present application may be a battery module or a battery pack. The battery device generally includes a box for encapsulating multiple battery cells or multiple battery modules. The box can reduce the risk of liquid or other foreign matter affecting the charging or discharging of the battery cells.

[0047] A battery cell may include a housing, an electrode assembly and an electrolyte, wherein the housing is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode column, a negative electrode column and a separator. A battery cell mainly relies on the movement of metal ions between the positive electrode column and the negative electrode column to work. The positive electrode column includes a positive electrode collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode collector, and the positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode column includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to pass a large current without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0048] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0049] In recent years, with the continuous development of new energy vehicles, in the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and important role. As the core component of new energy vehicles, battery devices have high requirements for reliability.

[0050] In the related art, a busbar is provided in the battery device, and multiple battery cells of the battery device are electrically connected through the busbar. A heat exchange structure is also provided in the battery device, and the heat exchange structure and the busbar are arranged adjacent to each other. The gap between the heat exchange structure and the busbar in the existing battery device is small, and the heat exchange structure and the busbar are easy to contact, and there is a greater risk of short circuit between the heat exchange structure and the busbar.

[0051] Based on the above considerations, in order to solve the problem of low reliability of the battery device, after in-depth research, a battery device was designed, including multiple battery cells, a heat exchange structure and multiple bus bars, the multiple battery cells are arranged in sequence along a first direction, along the second direction, the heat exchange structure is located on the same side of the multiple battery cells, the heat exchange structure cooperates with the multiple battery cells for heat exchange, along the third direction, at least one side of the heat exchange structure is provided with a bus bar, the bus bar connects two adjacent battery cells so that the two adjacent battery cells are electrically connected, and a bending portion is formed at the end of the bus bar facing the heat exchange structure to separate the bus bar and the heat exchange structure, and the first direction, the second direction and the third direction are perpendicular to each other.

[0052] In a battery device of this structure, a bus bar is provided with a bent portion, which is beneficial to increase the spacing distance between the bus bar and the heat exchange structure, can reduce the risk of short circuit between the bus bar and the heat exchange structure, and is beneficial to improve the reliability of the battery device.

[0053] The battery disclosed in the embodiment of the present application can be used in, but is not limited to, electrical devices such as vehicles, ships or aircraft. Electrical devices that can be connected to the battery device disclosed in the present application are all electrical devices that can be used by the battery device disclosed in the embodiment of the present application, which is conducive to improving the application scope of the battery device.

[0054] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electric device 100 in some embodiments of the present application.

[0055] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle may be a new energy vehicle, which may be a pure electric vehicle, a hybrid electric vehicle, or an extended-range vehicle, etc. A battery device 110 may be provided inside the vehicle, and the battery device 110 may be provided at the bottom, head, or tail of the vehicle. The battery device 110 may be used to power the vehicle, for example, the battery device 110 may be used as an operating power source for the vehicle, and the battery device 110 may be used as a power source for the vehicle. The vehicle may also include a controller 120 and a motor 130, the controller 120 is used to control the battery device 110 to power the motor 130, the battery device 110 is used for the working power demand in the starting, navigation, and driving of the vehicle, and the battery device 110 is connected to the vehicle to realize the application of the battery device 110 in the vehicle.

[0056] In the battery device 110, multiple battery cells 10 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 10 are connected in series and in parallel. Multiple battery cells 10 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 10 is accommodated in a box; of course, the battery device 110 can also be a battery device module in which multiple battery cells 10 are first connected in series, in parallel, or in a mixed connection, and multiple battery device modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in a box. The battery device 110 can also include other structures. For example, the battery device 110 can also include a bus 30 for realizing electrical connection between multiple battery cells 10.

[0057] Each battery cell 10 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 may be cylindrical, flat, rectangular, or in other shapes.

[0058] According to some embodiments of the present application, Figure 2 As shown, the battery device 110 may include: a plurality of battery cells 10, a heat exchange structure 20 and a bus 30. The plurality of battery cells 10 are arranged in sequence along a first direction. Along a second direction, the heat exchange structure 20 is located on the same side of the plurality of battery cells 10. The heat exchange structure 20 cooperates with the plurality of battery cells 10 for heat exchange. Along a third direction, a bus 30 is provided on at least one side of the heat exchange structure 20. The bus 30 connects two adjacent battery cells 10 so that the two adjacent battery cells 10 are electrically connected. A bending portion 32 is formed at the end of the bus 30 facing the heat exchange structure 20 so that the bus 30 and the heat exchange structure 20 are spaced apart. The first direction, the second direction and the third direction are perpendicular to each other.

[0059] The plurality of battery cells 10 may be arranged in sequence along a first direction. Figure 2 When arranging directions, the first direction is Figure 2The heat exchange structure 20 may be located on the same side of the plurality of battery cells 10 along the second direction. Figure 2 When arranging in direction, the second direction is Figure 2 The Z direction in the figure is perpendicular to the first direction and the second direction. The heat exchange structure 20 can cooperate with the battery cell 10 to exchange heat, thereby cooling or heating the battery cell 10, and then adjusting the temperature of the battery cell 10 to a suitable temperature. The heat exchange structure 20 can cooperate with multiple battery cells 10 to exchange heat at the same time, thereby achieving the effect of adjusting the temperature of multiple battery cells 10. Along the third direction, at least one side of the heat exchange structure 20 is provided with a bus bar 30. The heat exchange structure 20 can be arranged in sequence with the bus bar 30 along the third direction. When multiple battery cells 10 are connected as shown in FIG. Figure 2 When arranging directions, the third direction is Figure 2 In the Y direction, the first direction, the second direction and the third direction are perpendicular to each other.

[0060] As an example, the heat exchange structure 20 can be constructed as a plate-like structure, the heat exchange structure 20 can be a cold water plate, the heat exchange structure 20 can extend along a first direction, a heat exchange flow channel can be provided in the heat exchange structure 20, a heat exchange medium can flow in the heat exchange flow channel, and the heat exchange medium can cooperate with the battery cell 10 to exchange heat, thereby achieving the effect of regulating the temperature of the battery cell 10.

[0061] The heat exchange structure 20 and the busbar 30 may be located on the same side of the plurality of battery cells 10 along the second direction. The busbar 30 may be used to connect two adjacent battery cells 10. The two adjacent battery cells 10 may be electrically connected through the busbar 30. The busbar 30 may be welded to the corresponding two battery cells 10. The plurality of battery cells 10 may be connected in series, in parallel, or in mixed connection through at least one busbar 30. The number of busbars 30 may be reasonably selected and set according to the number of battery cells 10. The busbar 30 may be formed with a bent portion 32 at the end thereof facing the heat exchange structure 20 along the third direction. The bent portion 32 may be bent along the second direction in a direction away from the battery cell 10, or may be bent along the second direction in a direction facing the battery cell 10. The bent portion 32 avoids the heat exchange structure 20 along the third direction. By providing the bending portion 32, the bus bar 30 and the heat exchange structure 20 are separated. By increasing the gap between the bus bar 30 and the heat exchange structure 20, the risk of short circuit between the bus bar 30 and the heat exchange structure 20 can be reduced, which is beneficial to improving the reliability of the battery device 110.

[0062] In the above technical solution, the bending portion 32 is formed by the bus 30, which is beneficial to increase the gap between the bus 30 and the heat exchange structure 20, and can reduce the risk of short circuit between the bus 30 and the heat exchange structure 20, which is beneficial to improve the reliability of the battery device 110.

[0063] As an example, by forming a bending portion 32 on the bus 30, the space occupied by the bus 30 along the third direction can be reduced. When the spacing distance between the bus 30 and the heat exchange structure 20 is large enough, the length dimension of the heat exchange structure 20 along the third direction can be appropriately increased, thereby improving the heat exchange effect and heat exchange efficiency between the heat exchange structure 20 and the multiple battery cells 10.

[0064] As an example, the thickness dimension of the bus 30 in the present application along the second direction is greater than the thickness dimension of the bus in the prior art. In order to make the surface of the structure composed of multiple battery cells 10 smooth, the thickness dimension of the heat exchange structure 20 along the second direction can be increased, so that the cross-sectional size of the heat exchange channel in the heat exchange structure 20 can be increased, the flow rate of the heat exchange medium in the heat exchange structure 20 can be increased, and the ability of the heat exchange structure 20 to regulate the temperature can be further improved.

[0065] According to some embodiments of the present application, Figure 2 As shown, along the second direction, the bent portion 32 is bent toward a direction away from the battery cell 10 .

[0066] The busbar 30 and the corresponding battery cell 10 are welded and connected, and along the second direction, the bent portion 32 is bent in a direction away from the battery cell 10. When the battery device 110 is arranged in an up-down direction, the bent portion 32 is bent toward the top of the battery cell 10. By setting the bent portion 32 to be bent in a direction away from the battery cell 10, it is easy to connect and fix the busbar 30 and the battery cell 10, reduce the risk of difficulty in assembling the busbar 30 and the battery cell 10 due to narrow space, and reduce the difficulty of assembling the battery device 110.

[0067] In the above technical solution, by setting the bending portion 32 to bend along the second direction toward the direction away from the battery cell 10 , it is possible to facilitate installation of the busbar 30 and reduce the difficulty of assembling the battery device 110 .

[0068] According to some embodiments of the present application, Figure 2 As shown, the busbar 30 may include: a busbar body 31 and a bending portion 32 , the busbar body 31 is connected to the electrode poles 11 of the corresponding two adjacent battery cells 10 , and along the third direction, the end of the busbar body 31 facing the heat exchange structure 20 is connected with the bending portion 32 .

[0069] Among them, along the second direction, the bending portion 32 is located on the side of the busbar body 31 away from the battery cell 10, the bending portion 32 can be welded to the busbar body 31, the bending portion 32 can be integrally formed with the busbar body 31, the bending portion 32 and the battery cell 10 are spaced apart, and the busbar body 31 can fit the battery cell 10. The busbar body 31 can be connected to the electrode poles 11 of the corresponding two adjacent battery cells 10, and the busbar body 31 can be welded to the electrode poles 11, so as to achieve the effect that the busbar 30 electrically connects the two adjacent battery cells 10. Along the third direction, the end of the busbar body 31 facing the heat exchange structure 20 can be connected to the bending portion 32, and the bending portion 32 can be arranged above the end of the busbar body 31 facing the heat exchange structure 20, which is conducive to improving the compactness of the battery device 110 and improving the space utilization rate inside the battery device 110.

[0070] In the above technical solution, two adjacent battery cells 10 are connected by a bus body 31 , and the end of the bus body 31 along the third direction toward the heat exchange structure 20 is connected with a bending portion 32 , so that the battery device 110 has a compact structure, which is beneficial to improving the space utilization inside the battery device 110 .

[0071] According to some embodiments of the present application, the bending portion 32 may include: a first bending section 321 , the first bending section 321 is bent and connected to the busbar body 31 , and the first bending section 321 is located on a side of the busbar body 31 away from the battery cell 10 .

[0072] The first bending section 321 can be welded to the bus body 31, the first bending section 321 can be integrally formed with the bus body 31, the first bending section 321 can be bent to the bus body 31, and an angle can be formed between the first bending section 321 and the bus 30, which can be a right angle or similar to a right angle. The first bending section 321 is located on the side of the bus body 31 away from the battery cell 10 along the second direction, the bus body 31 can support the first bending section 321, and the first bending section 321 can be spaced apart from the heat exchange structure 20, so that the bus 30 and the heat exchange structure 20 are spaced apart.

[0073] In the above technical solution, by setting the first bending section 321, the bus 30 and the heat exchange structure 20 can be spaced apart, which is beneficial to increase the gap between the heat exchange structure 20 and the bus 30, reduce the risk of short circuit between the heat exchange structure 20 and the bus 30, and help improve the reliability of the battery device 110.

[0074] According to some embodiments of the present application, the bending portion 32 may further include: a second bending section 322 , the first bending section 321 is connected between the second bending section 322 and the bus body 31 , and the second bending section 322 and the first bending section 321 are bent and connected.

[0075] As an example, the first bending section 321 is connected between the second bending section 322 and the bus body 31, the second bending section 322 and the bus body 31 are opposite and spaced apart along the second direction, and the second bending section 322, the first bending section 321 and the bus body 31 can be arranged along the second direction. The first bending section 321 and the second bending section 322 are bent and connected, and an angle can be formed between the first bending section 321 and the second bending section 322, which can be a right angle or similar to a right angle, and the first bending section 321 can support the second bending section 322. As another example, the first bending section 321 is connected between the second bending section 322 and the bus body 31, the second bending section 322 can be bent toward the side of the first bending section 321 facing the heat exchange structure 20, the second bending section 322 can be opposite and spaced apart from the heat exchange structure 20 along the second direction, and the second bending section 322 can be located above the heat exchange structure 20.

[0076] In the above technical solution, by setting the second bending section 322, the surface area of ​​the bus 30 can be increased, which is beneficial to improving the heat dissipation performance of the bus 30. It can also reduce the probability of stress concentration, which is beneficial to extending the service life of the bus 30. It can also increase the spacing distance between the bus 30 and the heat exchange structure 20, and reduce the risk of short circuit between the bus 30 and the heat exchange structure 20.

[0077] According to some embodiments of the present application, along the third direction, the second bending section 322 is located on a side of the first bending section 321 that is away from the heat exchange structure 20 .

[0078] Among them, along the third direction, the bus body 31 and the second bending section 322 are located on the same side of the first bending section 321, and the second bending section 322 is located on the side of the first bending section 321 away from the heat exchange structure 20, so that the second bending section 322 avoids the heat exchange structure 20, which can reduce the probability of contact between the bus 30 and the heat exchange structure 20, and make the bus 30 and the heat exchange structure 20 reliably separated, which is beneficial to improving the reliability of the battery device 110.

[0079] In the above technical solution, the probability of contact between the bus bar 30 and the heat exchange structure 20 can be reduced, so that the bus bar 30 and the heat exchange structure 20 are reliably separated, which is beneficial to improving the reliability of the battery device 110.

[0080] According to some embodiments of the present application, the second bending segment 322 and the busbar body 31 are spaced apart along the second direction.

[0081] Among them, the first bending section 321 is connected between the second bending section 322 and the bus body 31, and the second bending section 322 and the bus body 31 are spaced apart along the second direction. Compared with the abutment between the second bending section 322 and the bus body 31, the contact area between the bus 30 and the air can be increased. The air can flow between the bus body 31 and the second bending section 322 to take away heat and reduce the working temperature of the bus 30. The heat dissipation effect of the bus 30 can be improved, which helps to maintain the performance of the battery cell 10 in a high temperature environment.

[0082] In the above technical solution, by arranging the second bending section 322 and the busbar body 31 to be spaced apart along the second direction, the heat dissipation effect of the busbar 30 can be improved, which helps to maintain the performance of the battery cell 10 in a high temperature environment.

[0083] According to some embodiments of the present application, the second bending section 322 is parallel to the busbar body 31 .

[0084] Among them, the first bending section 321 is connected between the second bending section 322 and the bus body 31, the second bending section 322 and the bus body 31 are spaced apart along the second direction, and the second bending section 322 can be arranged in parallel with the bus body 31, which is beneficial to improve the structural strength and stability of the bus 30, and can reduce the risk of deformation and breakage of the bus 30, and ensure safe and reliable power transmission. In addition, by arranging the second bending section 322 in parallel with the bus body 31, the structure of the bus 30 can be made more neat and standardized, which is convenient for the staff to install and inspect the bus 30.

[0085] In the above technical solution, by setting the second bending section 322 parallel to the bus body 31, the structural strength and stability of the bus 30 can be improved, the risk of deformation and breakage of the bus 30 can be reduced, and the safe and reliable power transmission can be ensured. The structure of the bus 30 is neat and standardized, which is convenient for the staff to install and inspect the bus 30.

[0086] According to some embodiments of the present application, the first bending section 321 is perpendicular to the third direction, and the second bending section 322 and the busbar body 31 are both perpendicular to the second direction.

[0087] The first bending section 321 is perpendicular to the third direction, and the first bending section 321 is parallel to the first direction and the second direction. The second bending section 322 is arranged in parallel with the bus body 31, and the second bending section 322 and the bus body 31 are both perpendicular to the second direction. The first bending section 321 and the second bending section 322 are bent and connected, and an angle is formed between the first bending section 321 and the second bending section 322, and the angle is a right angle. The first bending section 321 is bent and connected to the bus body 31, and an angle is formed between the first bending section 321 and the bus body 31, and the angle is a right angle. The first bending section 321 is perpendicular to the second bending section 322 and the bus body 31.

[0088] In the above technical solution, the vertical design can improve the structural rigidity of the bus 30. When the battery device 110 is subjected to external forces such as vibration and impact, the impact force can be transmitted more evenly, local stress concentration can be reduced, and the risk of deformation such as bending and twisting of the bus 30 can be reduced, which is beneficial to improving the reliability of the bus 30 and the reliability of the battery device 110.

[0089] According to some embodiments of the present application, there are multiple bus bars 30, and the multiple bus bars 30 form two bus arrangements. Along the third direction, the two bus arrangements are respectively located on both sides of the heat exchange structure 20, each bus arrangement includes multiple bus bars 30, and the multiple bus bars 30 in each bus arrangement are arranged sequentially along the first direction.

[0090] There may be a plurality of busbars 30, and the plurality of busbars 30 may be arranged on both sides of the heat exchange structure 20 along the third direction, and the plurality of busbars 30 may form two busbar arrangements. The two busbar arrangements may be located on both sides of the heat exchange structure 20, respectively, and each busbar arrangement includes a plurality of busbars 30. The plurality of busbars 30 in each busbar arrangement may be arranged in sequence along the first direction, and the plurality of battery cells 10 are arranged along the first direction, and the plurality of busbars 30 in each busbar arrangement are used to connect two corresponding battery cells 10.

[0091] By providing a plurality of bus bars 30 to form two bus bars, and the two bus bars are respectively located on both sides of the heat exchange structure 20, it is convenient to connect a plurality of battery cells 10 in series, in parallel or in mixed connection. If the battery cell 10 undergoes a volume change (such as expansion or contraction) during the charge and discharge process, the bus bars 30 on both sides can disperse the stress and reduce the risk of stress concentration on a certain part of the battery cell 10, thereby protecting the structural integrity of the battery cell 10 and helping to extend the service life of the battery device 110.

[0092] In the above technical solution, by providing two busbars arranged on both sides of the heat exchange structure 20 , the connection strength of two adjacent battery cells 10 can be improved, the reliability of the battery cells 10 can be improved, and the service life of the battery device 110 can be extended.

[0093] According to some embodiments of the present application, any two adjacent bus bars 30 in each column of bus arrangement are spaced apart.

[0094] The multiple busbars 30 in each bus arrangement can be arranged relatively and spaced apart along the first direction, so as to reduce electromagnetic coupling, reduce the possibility of electromagnetic interference, and reduce the probability of short circuit between two adjacent busbars 30.

[0095] The above technical solution is beneficial to improving the reliability of the busbar 30 and further improving the reliability of the battery device 110 .

[0096] According to some embodiments of the present application, the present application further provides an electrical device 100 , comprising the battery device 110 of the above embodiment.

[0097] The power-consuming device 100 may be any of the aforementioned devices using the battery device 110 . The use of the battery device 110 in the above-mentioned embodiments may improve the reliability of the power-consuming device 100 .

[0098] According to some embodiments of the present application, Figure 1-Figure 3 As shown, multiple battery cells 10 are arranged in sequence along the first direction, the heat exchange structure 20 is located on the same side of the multiple battery cells 10 along the second direction, and the multiple bus bars 30 and the heat exchange structure 20 are both located on the same side of the multiple battery cells 10 along the second direction. The multiple bus bars 30 are divided into two bus arrangement columns, and the two bus arrangement columns are located on both sides of the heat exchange structure 20 along the third direction. The multiple bus bars 30 in each bus arrangement column are arranged along the first direction, and any two adjacent bus bars 30 in each bus arrangement column are spaced apart. A bending portion 32 is formed at the end of the bus 30 facing the heat exchange structure 20 to separate the bus 30 from the heat exchange structure 20. The bending portion 32 is bent in a direction away from the battery cell 10. The bending portion 32 includes a first bending section 321 and a second bending section 322. The first bending section 321 is connected between the second bending section 322 and the bus body 31, the second bending section 322 and the bus body 31 are spaced apart along the second direction, the second bending section 322 and the bus body 31 are parallel, and the first bending section 321 is perpendicular to the second bending section 322 and the bus body 31.

[0099] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0100] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are arranged in sequence along a first direction; A heat exchange structure, along the second direction, the heat exchange structure is located on the same side of the plurality of battery cells, and the heat exchange structure cooperates with the plurality of battery cells for heat exchange; A bus is provided on at least one side of the heat exchange structure along the third direction, the bus connects two adjacent battery cells so that the two adjacent battery cells are electrically connected, a bending portion is formed at the end of the bus facing the heat exchange structure to separate the bus and the heat exchange structure, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that: Along the second direction, the bent portion bends in a direction away from the battery cell.

3. The battery device according to claim 1, characterized in that: The busbar comprises: a busbar body and the bending portion, the busbar body is connected to the electrode poles of two corresponding adjacent battery cells, and along the third direction, the end of the busbar body facing the heat exchange structure is connected to the bending portion.

4. The battery device according to claim 3, characterized in that: The bending portion includes a first bending section, the first bending section is bent and connected to the busbar body, and the first bending section is located on a side of the busbar body away from the battery cell.

5. The battery device according to claim 4, characterized in that: The bending portion further includes: a second bending section, the first bending section is connected between the second bending section and the busbar body, and the second bending section is connected to the first bending section in a bending manner.

6. The battery device according to claim 5, characterized in that: Along the third direction, the second bending section is located on a side of the first bending section away from the heat exchange structure.

7. The battery device according to claim 6, characterized in that: The second bending section and the busbar body are spaced apart along the second direction.

8. The battery device according to claim 5, characterized in that: The second bending section is parallel to the busbar body.

9. The battery device according to claim 5, characterized in that: The first bending section is perpendicular to the third direction, and the second bending section and the busbar body are both perpendicular to the second direction.

10. The battery device according to any one of claims 1 to 9, characterized in that: There are multiple bus bars, and the multiple bus bars form two columns of bus arrangements. Along the third direction, the two columns of bus arrangements are respectively located on both sides of the heat exchange structure, each column of the bus arrangement includes multiple bus bars, and the multiple bus bars in each column of the bus arrangement are arranged in sequence along the first direction.

11. The battery device according to claim 10, characterized in that: Any two adjacent bus bars in each column of the bus bars are spaced apart.

12. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-11.

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