Battery and electric device

Abstract

A battery and an electric device, the battery comprising: a plurality of battery packs arranged along a first direction, each battery pack comprising a plurality of battery cells arranged along a second direction, the first direction intersecting the second direction; the heat exchange part comprises a continuously-extending bent section, the bent section comprises a plurality of first heat exchange sections and at least one second heat exchange section, the first heat exchange sections extend in the second direction, the first heat exchange sections are arranged at intervals in the first direction, and the second heat exchange sections are sequentially connected and communicate with the first heat exchange sections. The plurality of first heat exchange sections and the plurality of battery packs are alternately stacked along a first direction, and the second heat exchange sections and the plurality of single batteries of the same battery pack are stacked along a second direction. According to the technical scheme, the structure of the heat exchange piece is simplified, and cost can be reduced. And the number of connecting points connected with the current collector is reduced, pipeline sealing is more reliable, and the risk of leakage of a heat exchange medium in the heat exchange piece is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and an electrical device. Background Art

[0002] The battery cells in the battery need to be in a certain temperature range during operation. When the temperature in the battery exceeds or falls below this range, the stability and performance of the battery will be greatly affected. The heat exchanger can be used to exchange heat with the battery cells to keep the battery in a suitable temperature range.

[0003] In the related art, heat exchange components are connected by pipelines through collectors, which has a complex structure, high cost, and a high risk of leakage due to multiple connection points. Utility Model Content

[0004] The embodiment of the utility model provides a battery and an electrical device, wherein the heat exchange structure of the battery is simple, which is beneficial to reducing costs and reducing the risk of leakage.

[0005] In a first aspect, an embodiment of the utility model provides a battery, comprising: a plurality of battery groups, the plurality of battery groups are arranged along a first direction, each of the battery groups comprises a plurality of battery cells arranged along a second direction, the first direction intersects with the second direction; a heat exchange element, the heat exchange element comprises a continuously extending bending section, the bending section comprises a plurality of first heat exchange sections and at least one second heat exchange section, the first heat exchange section extends along the second direction, the plurality of first heat exchange sections are arranged at intervals along the first direction, the at least one second heat exchange section is sequentially connected and connected to the plurality of first heat exchange sections, the plurality of first heat exchange sections and the plurality of battery groups are alternately stacked along the first direction, and the second heat exchange section and the plurality of battery cells of the same battery group are stacked along the second direction.

[0006] In the above technical solution, the second heat exchange section sequentially connects and communicates multiple first heat exchange sections, so that the bending section of the heat exchanger is formed into a U-shaped structure or a serpentine structure. The multiple first heat exchange sections of the bending section do not need to be connected to the external connection pipeline separately, nor do they need to be connected to the current collecting structure such as the collector separately, which simplifies the structure of the heat exchanger and helps to reduce costs. It is also helpful to reduce the connection points with the collector, and the pipeline sealing is more reliable, which helps to reduce the risk of leakage of the heat exchange medium in the heat exchanger.

[0007] In some embodiments, the first heat exchange section is provided between any two adjacent battery groups; and / or, the battery group is provided between any two adjacent first heat exchange sections.

[0008] In the above technical solution, each battery pack can exchange heat with the first heat exchange section, which is beneficial to increase the heat exchange area and heat exchange efficiency; or each first heat exchange section can exchange heat with the battery pack, reducing the number of required first heat exchange sections, reducing the space occupied by the heat exchange component in the first direction, and making the structure more compact.

[0009] In some embodiments, the heat exchange element includes a plurality of the bending segments, the plurality of the bending segments are arranged along the first direction or the second direction, and the plurality of the bending segments are connected in series or in parallel.

[0010] In the above technical solution, multiple bending sections are connected in series, so that the heat exchanger is formed as a continuously extended plate as a whole, which reduces the connection points and has a better effect of reducing the risk of heat exchange medium leakage. Multiple bending sections are connected in parallel and multiple bending sections are arranged along the first direction, which can shorten the extension length of each bending section, thereby reducing the difficulty of forming each bending section.

[0011] In some embodiments, both ends of the heat exchange element or both ends of the bending section are respectively connected with pipe joints, and the two pipe joints are located on the same side of the heat exchange element along the first direction, or on the same side of the heat exchange element along the second direction.

[0012] In the above technical solution, the two pipe joints are located on the same side of the heat exchanger, so that the pipe joints can be led out from the same side of the heat exchanger, for example, the pipe joints pass through the same side wall of the box assembly, which is convenient for connection with external pipes.

[0013] In some embodiments, the two pipe joints are located on the same side of the heat exchanger along the first direction, and the heat exchanger also includes a first lead-out section, which extends along the first direction, and the first heat exchange section close to the pipe joint along the first direction is connected to the pipe joint through the first lead-out section; and / or, the heat exchanger also includes a second lead-out section, which extends along the first direction and is located on one side of the bending section along the second direction, and the first heat exchange section away from the pipe joint along the first direction is connected to the pipe joint through the second lead-out section.

[0014] In the above technical solution, by setting the first lead-out section and the second lead-out section, the two first heat exchange sections at both ends of the bending section along the first direction can be connected to the pipe joints located on the same side, making the extension path setting of the heat exchange component more flexible and simple in structure.

[0015] In some embodiments, the second lead-out section is separated from the second heat exchange section of the bending section by a predetermined gap.

[0016] In the above technical solution, the heat exchange between the heat exchange medium in the second lead-out section and the heat exchange medium in the second heat exchange section can be reduced, thereby reducing heat exchange interference.

[0017] In some embodiments, the first heat exchange section is in contact with the adjacent battery pack surface; and / or the second heat exchange section is in contact with the adjacent battery pack surface.

[0018] In the above technical solution, the heat exchange area can be increased, the thermal resistance between the heat exchange section and the battery pack can be reduced, and the heat exchange efficiency can be improved.

[0019] In some embodiments, the battery cell includes two first side surfaces opposite to each other along the first direction and two second side surfaces opposite to each other along the second direction, and an area of ​​the first side surface is greater than an area of ​​the second side surface.

[0020] In the above technical solution, the first heat exchange section can exchange heat with the first side with a larger area of ​​multiple battery cells in an adjacent battery pack, and the second side can exchange heat with the second side of one or more battery packs. The contact area between the first heat exchange section and the battery cell is larger, which is more conducive to increasing the heat exchange area and improving the heat exchange efficiency.

[0021] In some embodiments, the bending section has a plurality of parallel heat exchange channels.

[0022] In the above technical solution, the heat exchange medium in multiple heat exchange channels can be exchanged separately, so that the heat exchange medium in different areas of the heat exchange element is distributed more evenly, and the separation structure that separates multiple heat exchange channels can improve the structural strength of the bending section, thereby improving the stability of the bending section.

[0023] In some embodiments, among the plurality of heat exchange channels, the flow directions of the heat exchange medium in at least two of the heat exchange channels are opposite.

[0024] In the above technical solution, the heat exchange medium in at least two heat exchange channels flows in opposite directions, so that the same battery cell can exchange heat with the heat exchange medium near the inlet end of one heat exchange channel and with the heat exchange medium near the outlet end of another heat exchange channel. As a result, the heat exchange uniformity of the battery cells in different areas along the entire extension path of the bending section is better.

[0025] In some embodiments, the plurality of heat exchange channels are arranged along a third direction, and the third direction, the first direction, and the second direction intersect each other.

[0026] In the above technical solution, the heat exchange medium in the multiple heat exchange channels can directly exchange heat with the adjacent battery cells of the same type through the channel walls, thereby reducing energy loss.

[0027] In some embodiments, among the plurality of heat exchange channels, flow directions of the heat exchange medium in any two adjacent heat exchange channels are opposite.

[0028] In the above technical solution, in the third direction, the temperature distribution of the heat exchange medium in the plurality of heat exchange channels is relatively uniform, thereby improving the heat exchange uniformity of different regions in the third direction of the same battery cell.

[0029] In some embodiments, both ends of the heat exchange component or the bending section are respectively connected to pipe joints, one of the pipe joints is provided with a plurality of first interfaces separated from each other, and the other pipe joint is provided with a plurality of second interfaces separated from each other, one end of the plurality of heat exchange channels is respectively connected to the plurality of first interfaces, and the other end of the plurality of heat exchange channels is respectively connected to the plurality of second interfaces.

[0030] In the above technical solution, both ends of each heat exchange channel respectively realize the inflow and outflow of heat exchange medium through the corresponding first interface and second interface, so that multiple heat exchange channels can be connected in parallel and the pipeline connection is simple.

[0031] In some embodiments, the heat exchange element is an integrally formed flat tube.

[0032] In the above technical solution, one-piece molding can reduce the connection points on the heat exchange component, thereby reducing the risk of heat exchange medium leakage; the flat tube can increase the heat exchange area with the battery cell, improve the heat exchange efficiency and heat exchange uniformity of the battery cell.

[0033] In a second aspect, an embodiment of the utility model further provides an electrical device, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of a vehicle provided by an embodiment of the utility model;

[0035] Figure 2 A schematic diagram of the structure of a battery provided in an embodiment of the utility model;

[0036] Figure 3 A schematic diagram of the structure of a battery cell provided by an embodiment of the utility model;

[0037] Figure 4 A schematic diagram of a partial structure of a battery provided in an embodiment of the utility model;

[0038] Figure 5 An exploded view of a battery provided in an embodiment of the utility model;

[0039] Figure 6 A schematic diagram of the structure of a heat exchange member provided in the first embodiment of the utility model;

[0040] Figure 7 A schematic diagram of the structure of a heat exchange member provided in the second embodiment of the utility model;

[0041] Figure 8 A schematic diagram of the structure of a heat exchange member provided in the third embodiment of the utility model;

[0042] Fig. 9 A schematic diagram of the structure of a heat exchange member provided in the fourth embodiment of the utility model;

[0043] Fig.10 A schematic diagram of the structure of a heat exchange member provided in the fifth embodiment of the utility model;

[0044] Fig.11 A schematic diagram of the structure of a heat exchange member provided in a sixth embodiment of the utility model;

[0045] Fig.12 A schematic diagram of the structure of a heat exchange member provided in the seventh embodiment of the utility model;

[0046] Fig.13 A cross-sectional view of a heat exchange element provided in some embodiments of the utility model.

[0047] Reference numerals:

[0048] Vehicle 1; battery 1000; controller 2000; motor 3000;

[0049] Box assembly 200; first part 210; second part 220;

[0050] Battery pack 10; battery cell 11; first side surface 111; second side surface 112;

[0051] Heat exchange element 20; heat exchange channel 201; bending section 21; first heat exchange section 211; second heat exchange section 212; first lead-out section 22; second lead-out section 23;

[0052] Pipeline connector 30;

[0053] The first direction F1; the second direction F2; the third direction F3. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0055] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the present invention and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0056] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. 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.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" 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 the present invention can be understood according to specific circumstances.

[0058] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0059] In the embodiments of the present invention, 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 invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.

[0060] The term "plurality" used in the present invention refers to more than two (including two).

[0061] At present, from the perspective of market development, 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 stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0062] It is understandable that the temperature environment inside the battery is affected by the external weather conditions or the working state of the battery cells, and the battery cells in the battery need to be in a certain temperature range when operating. When the temperature inside the battery exceeds or falls below this range, the stability and performance of the battery will be greatly affected. For example, when the weather is hot or the battery cells release a lot of heat during operation, the battery cells need to be cooled and dissipated so that the temperature inside the battery is within the required temperature range. When the weather is cold, the battery cells need to be heated and heated so that the temperature inside the battery can still be within the required temperature range.

[0063] The heat exchange component can be used to circulate the heat exchange medium and exchange heat with the battery cell, so that the heat or cold of the heat exchange medium is transferred to the battery cell, realizing heat exchange with the battery cell, so as to heat or cool the battery cell, realize temperature regulation, and enable the battery cell to be in a more suitable temperature range.

[0064] In some related technologies, heat exchangers are sandwiched between adjacent battery cells, and multiple heat exchangers are connected through a current collector, so that the heat exchange medium is diverted to multiple heat exchangers through the current collector and exchanges heat with the battery cells. After the heat exchange, the heat exchange medium in the multiple heat exchangers converges to the current collector. This results in complex pipe connections for heat exchangers in the battery, high costs, and more connection points, resulting in a high risk of heat exchange medium leakage.

[0065] Based on this, the present application proposes a battery, comprising: a plurality of battery groups and a heat exchange element. The plurality of battery groups are arranged along a first direction, each battery group includes a plurality of battery cells arranged along a second direction, and the first direction intersects with the second direction. The heat exchange element includes a continuously extending bending section, the bending section includes a plurality of first heat exchange sections and at least one second heat exchange section, the first heat exchange section extends along the second direction, the plurality of first heat exchange sections are arranged at intervals along the first direction, and at least one second heat exchange section is sequentially connected and connected to the plurality of first heat exchange sections. The plurality of first heat exchange sections and the plurality of battery groups are alternately stacked along the first direction, and the second heat exchange sections and the plurality of battery cells of the same battery group are stacked along the second direction.

[0066] In the battery of the above embodiment, the second heat exchange segment sequentially connects and communicates multiple first heat exchange segments, so that the bending segment of the heat exchange element is formed into a U-shaped structure or a serpentine structure. The multiple first heat exchange segments of the bending segment do not need to be connected to the external connection pipeline separately, nor do they need to be connected to the current collecting structure such as the current collector separately, which simplifies the structure of the heat exchange element and helps to reduce costs. It is also helpful to reduce the connection points with the current collector, and the pipeline sealing is more reliable, which helps to reduce the risk of leakage of the heat exchange medium in the heat exchange element.

[0067] The heat exchanger disclosed in the embodiment of the present application can be used in an electrical device that uses a battery as a power source or various energy storage systems that use a battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0068] For the convenience of description, the following embodiments are described by taking a vehicle 1 as an example of an electrical device in an embodiment of the present application.

[0069] Reference Figure 1 , Figure 1 A schematic diagram of a vehicle 1 provided for some embodiments of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1000 is provided inside the vehicle 1, and the battery 1000 may be provided at the bottom, head or tail of the vehicle 1. The battery 1000 may be used to power the vehicle 1, for example, the battery 1000 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery 1000 to power the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0070] In some embodiments of the present application, the battery 1000 can not only serve as an operating power source for the vehicle 1 , but also serve as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0071] Reference Figure 2 , Figure 2 This is an exploded view of a battery 1000 according to some embodiments of the present application, wherein the battery 1000 includes a case assembly 200, a plurality of battery packs 10 and a heat exchange component 20, wherein the case assembly 200 has a receiving cavity, and the plurality of battery packs 10 are received in the receiving cavity of the case assembly 200, a portion of the heat exchange component 20 is stacked with the plurality of battery packs 10 and a portion of the heat exchange component 20 is stacked with the battery cells 11 of the battery packs 10.

[0072] The box assembly 200 is used to provide a storage space for multiple battery packs 10, and the box assembly 200 can adopt a variety of structures. In some embodiments, the box assembly 200 may include a first part 210 and a second part 220, the first part 210 and the second part 220 cover each other, and the first part 210 and the second part 220 jointly define a storage space for accommodating multiple battery packs 10. The second part 220 may be a hollow structure with one end open, the first part 210 may be a plate-like structure, and the first part 210 covers the open side of the second part 220, so that the first part 210 and the second part 220 jointly define a storage space; the first part 210 and the second part 220 may also be hollow structures with one side open, and the open side of the first part 210 covers the open side of the second part 220. Of course, the box assembly 200 formed by the first part 210 and the second part 220 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0073] In the battery 1000, the battery pack 10 includes a plurality of battery cells 11, and the plurality of battery packs 10, the plurality of battery cells 11 of the same battery pack 10, and the battery cells 11 of different battery packs 10 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of battery cells 11 are both connected in series and in parallel. The plurality of battery cells 11 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the plurality of battery cells 11 is accommodated in the box assembly 200; of course, the battery 1000 can also be a battery module formed by first connecting a plurality of battery cells 11 in series, in parallel, or in mixed connection, and then the plurality of battery modules are connected in series, in parallel, or in mixed connection to form a whole, and then accommodated in the box assembly 200. The battery 1000 may also include other structures. For example, the battery 1000 may also include a busbar component for realizing electrical connection between the plurality of battery cells 11.

[0074] Each battery cell 11 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 11 may be flat, rectangular or in other shapes. Figure 3 As shown, Figure 3 A schematic diagram of the structure of a battery cell 11 provided for an embodiment of the utility model, wherein the battery cell 11 may include a shell, an electrode assembly and an electrolyte, wherein the shell is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell 11 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. A pole or the like connected to the pole ear may be provided on the shell of the battery cell 11 as an electrical connection portion of the battery cell 11. The heat exchanger 20 may perform heat exchange with the shell of the battery cell 11 to regulate the temperature of the battery cell 11.

[0075] Hereinafter, a battery 1000 according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0076] Please refer to Figure 4-Figure 6 , Figure 4 A partial structural schematic diagram of a battery 1000 provided in an embodiment of the utility model; Figure 5 An exploded view of a battery 1000 provided in an embodiment of the utility model; Figure 6 The schematic diagram of the structure of the heat exchanger 20 provided in the first embodiment of the utility model is as follows. The battery 1000 comprises: a plurality of battery packs 10 and a heat exchanger 20 .

[0077] A plurality of battery packs 10 are arranged along a first direction F1, and each battery pack 10 includes a plurality of battery cells 11 arranged along a second direction F2, and the first direction F1 intersects the second direction F2. The first direction F1 and the second direction F2 are perpendicular to each other or form a certain angle, for example, the first direction F1 may be the width direction of the battery 1000, and the second direction F2 may be the length direction of the battery 1000.

[0078] The heat exchange element 20 includes a continuously extending bending section 21, and the bending section 21 includes a plurality of first heat exchange sections 211 and at least one second heat exchange section 212. The first heat exchange sections 211 extend along the second direction F2, and the plurality of first heat exchange sections 211 are arranged at intervals along the first direction F1, and at least one second heat exchange section 212 is sequentially connected and connected to the plurality of first heat exchange sections 211. The plurality of first heat exchange sections 211 and the plurality of battery packs 10 are alternately stacked along the first direction F1, and the second heat exchange sections 212 and the plurality of battery cells 11 of the same battery pack 10 are stacked along the second direction F2.

[0079] The heat exchanger 20 is a tube structure that can allow the heat exchange medium to flow and limit the flow path of the heat exchange medium, such as a circular tube, a rectangular tube, an elliptical tube, etc. The heat exchanger 20 can be made of a material with excellent thermal conductivity, such as a metal material, specifically aluminum, copper, etc. For example, the heat exchanger 20 can be an aluminum tube.

[0080] The continuously extending bending section 21 means that the bending section 21 does not extend along a straight line as a whole from one end to the other end of the bending section 21, and the extension path includes an arc or a folded line area. The first heat exchange section 211 extends along the second direction F2, and can extend along a straight line or along an arc, etc. The second heat exchange section 212 can extend along a straight line or along an arc, etc.

[0081] The bending section 21 can be integrally formed, or the first heat exchange section 211 and the second heat exchange section 212 can be formed separately and then spliced ​​and connected in sequence. For example, the bending section 21 can be an integrally formed part as a whole, and the forming method is extrusion molding, or it can be formed by bending a sheet metal and fixed by welding, etc. For another example, each heat exchange section can be extruded, or it can be formed by bending a sheet metal and fixed by welding, and then the formed first heat exchange section 211 and the second heat exchange section 212 are connected by welding or the like. Among them, the integrally formed bending section 21 can further reduce the connection points and reduce the risk of leakage of the heat exchange medium.

[0082] It is worth noting that in the embodiment where the wall surface of the bending section 21 is a multi-layer structure, one-piece molding means that at least one layer is an one-piece molded part; in the embodiment where the bending section 21 has internal structures such as a partition structure and a supporting structure, the internal structure can be integrally molded with the bending section 21, or it can be molded separately and then connected to the bending section 21 by welding or other methods.

[0083] Multiple first heat exchange segments 211 and multiple battery packs 10 are alternately stacked along the first direction F1. Here, it can be a first heat exchange segment 211 and a battery pack 10 in the order of alternate stacking, or a first heat exchange segment 211 and multiple battery packs 10 in the order of alternate stacking, or multiple first heat exchange segments 211 and a battery pack 10 in the order of alternate stacking, or multiple first heat exchange segments 211 and multiple battery packs 10 in the order of alternate stacking. In addition, the components at both ends of the stacking structure along the first direction F1 can be the first heat exchange segment 211 or the battery pack 10, and the components at both ends of the first direction F1 can be the same or different.

[0084] The second heat exchange section 212 is stacked with multiple battery cells 11 of the same battery pack 10 along the second direction F2. Here, the second heat exchange section 212 can be located on one side of the multiple battery cells 11 of the battery pack 10 along the second direction F2, or between two adjacent battery cells 11 of the battery pack 10.

[0085] According to the battery 1000 of the embodiment of the utility model, the second heat exchange segment 212 sequentially connects and communicates multiple first heat exchange segments 211, so that the bending segment 21 of the heat exchange element 20 is formed into a U-shaped structure or a serpentine structure. The multiple first heat exchange segments 211 of the bending segment 21 do not need to be connected to the external connection pipeline separately, nor do they need to be connected to the current collecting structure such as the current collector separately, which simplifies the structure of the heat exchange element 20 and helps to reduce costs. It is also helpful to reduce the connection points with the current collector, and the pipeline sealing is more reliable, which helps to reduce the risk of leakage of the heat exchange medium in the heat exchange element 20.

[0086] According to some embodiments of the present invention, Figure 4 and Figure 5As shown, a first heat exchange segment 211 is provided between any two adjacent battery groups 10. One first heat exchange segment 211 or multiple first heat exchange segments 211 arranged along the first direction F1 may be provided between any two adjacent battery groups 10. Thus, each battery group 10 can exchange heat with the first heat exchange segment 211, which is beneficial to increase the heat exchange area and heat exchange efficiency.

[0087] Alternatively, a battery pack 10 is provided between any two adjacent first heat exchange sections 211, and one battery pack 10 or multiple battery packs 10 arranged along the first direction F1 are provided between any two adjacent first heat exchange sections 211. Thus, each first heat exchange section 211 can exchange heat with the battery pack 10, reducing the number of required first heat exchange sections 211, reducing the space occupied by the heat exchange element 20 in the first direction F1, and making the structure more compact.

[0088] Alternatively, a first heat exchange segment 211 is provided between any two adjacent battery groups 10, and a battery group 10 is provided between any two adjacent first heat exchange segments 211, that is, the first heat exchange segments 211 and the battery groups 10 are alternately arranged in the order of one first heat exchange segment 211 and one battery group 10. The distribution of the battery groups 10 and the first heat exchange segments 211 is more uniform, the total heat exchange area of ​​the battery groups 10 and the heat exchange element 20 is larger, the heat exchange efficiency is higher, the heat exchange uniformity of the multiple battery groups 10 is better, and the structure is more compact.

[0089] In some embodiments, Figure 6-Figure 8 As shown, Figure 6-Figure 8 Schematic diagrams of the structures of heat exchangers 20 in different embodiments, where the heat exchangers 20 may include only one bending section 21. The heat exchangers 20 are formed as a continuously extending plate body, which has a better effect of reducing connection points and a simpler structure.

[0090] In other embodiments, Figure 9-12 As shown, Figure 9-12 Schematic diagrams of the structures of heat exchangers 20 in different embodiments, the heat exchangers 20 may include a plurality of bending sections 21. The plurality of bending sections 21 are arranged along the first direction F1 or the second direction F2, and the plurality of bending sections 21 are connected in series or in parallel.

[0091] For example Fig. 9 and Fig.10 The two bending sections 21 are arranged in series along the second direction F2; for example Fig.11 The two bending sections 21 are arranged along the second direction F2 and connected in parallel; for example Fig.12 The two bending sections 21 are arranged along the first direction F1 and connected in parallel.

[0092] Among them, multiple bending sections 21 are connected in series, so that the heat exchanger 20 is formed as a continuously extended plate as a whole, reducing the connection points and reducing the risk of heat exchange medium leakage. Multiple bending sections 21 are connected in parallel and multiple bending sections 21 are arranged along the first direction F1, which can make the extension length of each bending section 21 shorter, thereby reducing the difficulty of forming each bending section 21.

[0093] Furthermore, the multiple bending sections 21 are arranged along the second direction F2, which can increase the number of second heat exchange sections 212 stacked with multiple battery cells 11 of the same battery pack 10, thereby increasing the heat exchange area and improving the heat exchange efficiency.

[0094] According to some embodiments of the present invention, Figure 6-Figure 12 As shown, both ends of the heat exchanger 20 or both ends of the bending section 21 are respectively connected with pipe joints 30. The two pipe joints 30 are located on the same side of the heat exchanger 20 along the first direction F1 or the same side of the heat exchanger 20 along the second direction F2.

[0095] For example Figure 6-Figure 10 As shown, in the embodiment where the heat exchanger 20 includes only one bending section 21 or includes a plurality of bending sections 21 connected in series, both ends of the heat exchanger 20 are connected to pipeline connectors 30 respectively. Fig.11 and Fig.12 As shown, in the embodiment where the heat exchanger 20 includes a plurality of parallel bending sections 21, both ends of the bending section 21 are respectively connected with pipe joints 30. The pipe joints 30 and the connected heat exchanger 20 or bending section 21 can be sealed by plugging, welding, etc.

[0096] like Figure 6 , Figure 8-Figure 11 As shown, the two pipe joints 30 are located on the same side of the heat exchange element 20 along the first direction F1; Figure 7 and Fig.12 As shown, the two pipe connectors 30 are located on the same side of the heat exchanger 20 along the second direction F2. The two pipe connectors 30 are located on the same side of the heat exchanger 20, so that the pipe connectors 30 can be led out from the same side of the heat exchanger 20, for example, the pipe connectors 30 pass through the same side wall of the box assembly 200, which is convenient for connection with external pipes.

[0097] The connection of the pipe connector 30 is described below by taking the case where two pipe connectors 30 are located on the same side of the heat exchanger 20 along the first direction F1 as an example. According to the following description, it is understandable that the two pipe connectors 30 are located on the same side of the heat exchanger 20 along the second direction F2.

[0098] like Figure 6 , Figure 8 , Fig.10 and Fig.11As shown, the two pipe connectors 30 are located on the same side of the heat exchange element 20 along the first direction F1. The heat exchange element 20 also includes a first lead-out section 22, which extends along the first direction F1. The first heat exchange section 211 close to the pipe connector 30 along the first direction F1 is connected to the pipe connector 30 through the first lead-out section 22.

[0099] like Figure 6 , Figure 8 , Figure 9-11 As shown, the two pipe connectors 30 are located on the same side of the heat exchanger 20 along the first direction F1. The heat exchanger 20 also includes a second lead-out section 23, which extends along the first direction F1 and is located on one side of the bending section 21 along the second direction F2. The first heat exchange section 211 away from the pipe connector 30 along the first direction F1 is connected to the pipe connector 30 through the second lead-out section 23.

[0100] For example Figure 6 As shown, the heat exchange element 20 includes a first lead-out section 22 and a second lead-out section 23, through which the two first heat exchange sections 211 at both ends of the first direction F1 are connected to the pipe joint 30, and the two pipe joints 30 are located at both ends of the heat exchange element 20 along the second direction F2.

[0101] For example Figure 8 As shown, the heat exchange element 20 includes a first lead-out section 22 and a second lead-out section 23, through which the two first heat exchange sections 211 at both ends of the first direction F1 are connected to the pipe connector 30, and the two pipe connectors 30 are located at the same end of the heat exchange element 20 along the second direction F2.

[0102] For example Fig. 9 As shown, the heat exchange element 20 includes two second lead-out sections 23, through which the first heat exchange section 211 of the two bending sections 21 away from the pipe joint 30 is connected to the pipe joint 30, and the two pipe joints 30 are located at both ends of the heat exchange element 20 along the second direction F2.

[0103] For example Fig.10 As shown, the heat exchange element 20 includes two first lead-out sections 22, through which the first heat exchange section 211 of the two bending sections 21 close to the pipe joint 30 is connected to the pipe joint 30, and the two pipe joints 30 are located at the ends of the two bending sections 21 close to each other in the second direction F2.

[0104] For example Fig.11 As shown, the two bending sections 21 of the heat exchange element 20 are arranged in parallel along the second direction F2, and each bending section 21 is connected to a first lead-out section 22 and a second lead-out section 23 to achieve connection between the two first heat exchange sections 211 at both ends of the first direction F1 and the pipe joint 30.

[0105] By providing the first lead-out section 22 and the second lead-out section 23, the two first heat exchange sections 211 at both ends of the bending section 21 along the first direction F1 can be connected to the pipe joint 30 located on the same side, so that the extension path setting of the heat exchange component 20 is more flexible and the structure is simple.

[0106] In some embodiments, Figure 6 As shown, a predetermined gap is separated from the second lead-out section 23 and the second heat exchange section 212 of the bending section 21. This can reduce heat exchange between the heat exchange medium in the second lead-out section 23 and the heat exchange medium in the second heat exchange section 212, thereby reducing heat exchange interference.

[0107] In the embodiment where the heat exchange medium flows from the bending section 21 into the second lead-out section 23, the influence of the heat exchange medium that has undergone heat exchange in the second lead-out section 23 on the temperature of the heat exchange medium in the second heat exchange section 212 can be reduced. For example, it is not easy for the temperature of the heat exchange medium in the second heat exchange section 212 to increase during the cooling process of the battery 1000. In the embodiment where the heat exchange medium flows from the second lead-out section 23 into the bending section 21, the influence of the heat exchange medium that has undergone heat exchange in the second heat exchange section 212 on the temperature of the heat exchange medium in the second lead-out section 23 can be reduced. For example, it is not easy for the temperature of the heat exchange medium in the second lead-out section 23 to increase during the cooling process of the battery 1000, thereby cooling the battery cells 11 in other areas.

[0108] like Figure 4 As shown, in some embodiments, the first heat exchange segment 211 is in surface contact with the adjacent battery group 10. In other embodiments, the second heat exchange segment 212 is in surface contact with the adjacent battery group 10. Alternatively, the first heat exchange segment 211 is in surface contact with the adjacent battery group 10, and the second heat exchange segment 212 is in surface contact with the adjacent battery group 10.

[0109] Here, "surface contact" should be understood in a broad sense, that is, the heat exchange section and the battery pack 10 can directly contact each other to achieve direct heat transfer; the surface of the heat exchange section and the surface of the battery pack 10 can also be bonded by heat conductive adhesive to achieve large-area heat conduction. This can reduce the thermal resistance between the heat exchange section and the battery pack 10 and improve the heat exchange efficiency.

[0110] In some specific embodiments, Figure 3-Figure 5 As shown, the battery cell 11 includes two first side surfaces 111 opposite to each other along a first direction F1 and two second side surfaces 112 opposite to each other along a second direction F2 , and an area of ​​the first side surface 111 is greater than an area of ​​the second side surface 112 .

[0111] The battery cell 11 is generally formed into a square structure. The first side surface 111 can exchange heat with the adjacent first heat exchange section 211 , and the second side surface 112 can exchange heat with the adjacent second heat exchange section 212 .

[0112] Therefore, the first heat exchange section 211 can exchange heat with the first side 111 with a larger area of ​​multiple battery cells 11 in the adjacent battery group 10, and the second side 112 can exchange heat with the second side 112 of one or more battery groups 10. The contact area between the first heat exchange section 211 and the battery cell 11 is larger, which is more conducive to increasing the heat exchange area and improving the heat exchange efficiency.

[0113] In some specific embodiments, the first side surface 111 is the largest surface of the battery cell 11 , which has a better effect of improving the heat exchange efficiency.

[0114] According to some embodiments of the present invention, Fig.13 As shown, Fig.13 This is a cross-sectional view of a heat exchange component 20 provided in some embodiments of the present invention, wherein a plurality of parallel heat exchange channels 201 are provided in the bending section 21 .

[0115] The parallel connection of multiple heat exchange channels 201 means that the heat exchange medium flowing into the bending section 21 enters multiple heat exchange channels 201 for heat exchange respectively, rather than exchanging heat in one heat exchange channel 201 and then flowing into another heat exchange channel 201 for heat exchange. As a result, the heat exchange medium in the multiple heat exchange channels 201 can exchange heat separately, so that the heat exchange medium in different areas of the heat exchange element 20 is distributed more evenly, and the separation structure separating the multiple heat exchange channels 201 can improve the structural strength of the bending section 21, thereby improving the stability of the bending section 21.

[0116] The flow direction of the heat exchange medium in the multiple heat exchange channels 201 can be the same, so that the heat exchange medium can flow into the bending section 21 through the same end and then be divided into multiple heat exchange channels 201 for heat exchange, thereby simplifying the flow path. Of course, the flow direction of the heat exchange medium in the multiple heat exchange channels 201 may not be exactly the same.

[0117] In some embodiments, among the multiple heat exchange channels 201, the flow directions of the heat exchange medium in at least two heat exchange channels 201 are opposite. For example, in an embodiment including two heat exchange channels 201, the heat exchange medium in one heat exchange channel 201 flows from one end to the other end of the bending section 21, and the heat exchange medium in another heat exchange channel 201 flows from the other end to one end of the bending section 21, so that the flow directions of the heat exchange medium in the two heat exchange channels 201 are opposite. For example, in an embodiment including three heat exchange channels 201, the heat exchange medium in two heat exchange channels 201 can flow from one end to the other end of the bending section 21, and the heat exchange medium in the third heat exchange channel 201 can flow from the other end to one end of the bending section 21.

[0118] Taking the cooling of the battery cell 11 by the heat exchange medium as an example, the temperature of the heat exchange medium just flowing into the bending section 21 is lower than the temperature of the heat exchange medium flowing out of the bending section 21. By having the heat exchange medium in at least two heat exchange channels 201 flow in opposite directions, the same battery cell 11 can exchange heat with the heat exchange medium near the inlet end of one heat exchange channel 201 and with the heat exchange medium near the outlet end of another heat exchange channel 201. As a result, the heat exchange uniformity of the battery cells 11 in different areas along the entire extension path of the bending section 21 is better.

[0119] In an embodiment where the heat exchange element 20 also includes other heat exchange sections connected to the bending section 21, such as a first lead-out section 22 and a second lead-out section 23, the other heat exchange sections can be provided with flow channels that are connected one-to-one with the multiple heat exchange channels 201 in the bending section 21 to ensure that the heat exchange channels 201 in the entire heat exchange element 20 are unobstructed.

[0120] The arrangement of the multiple heat exchange channels 201 of the bending section 21 can be flexibly set. For example, the multiple heat exchange channels 201 can be arranged in a straight line along any direction perpendicular to the extension direction of the bending section 21, or arranged in an array perpendicular to the extension direction of the bending section 21. Taking the heat exchange channels 201 in the first heat exchange section 211 as an example, the multiple heat exchange channels 201 can be arranged along the first direction F1, arranged along the third direction F3, or arranged in an array along the first direction F1 and the third direction F3. Among them, the third direction F3, the first direction F1 and the second direction F2 intersect each other. For example, the first direction F1 is the width direction of the battery 1000, the second direction F2 is the length direction of the battery 1000, and the third direction F3 is the height direction of the battery 1000.

[0121] like Fig.13 As shown, in the embodiment where multiple heat exchange channels 201 are arranged along the third direction F3, the heat exchange medium in the multiple heat exchange channels 201 can directly exchange heat with the adjacent same battery cells 11 through the channel walls, thereby reducing energy loss.

[0122] In some embodiments where the plurality of heat exchange channels 201 are arranged along the third direction F3 , the flow directions of the heat exchange media in any two adjacent heat exchange channels 201 among the plurality of heat exchange channels 201 are opposite.

[0123] For example, in an embodiment where there are three heat exchange channels 201 , the heat exchange medium flows in the two heat exchange channels 201 at the two ends in the same direction and in the opposite direction to the heat exchange medium flows in the middle heat exchange channel 201 .

[0124] Therefore, in the third direction F3 , the temperature distribution of the heat exchange medium in the plurality of heat exchange channels 201 is relatively uniform, thereby improving the heat exchange uniformity of different regions in the third direction F3 of the same battery cell 11 .

[0125] In some embodiments of the present invention, both ends of the heat exchanger 20 or the bent section 21 are respectively connected to the pipe joints 30, that is, in the embodiment where the heat exchanger 20 is continuously extended as a whole, Figure 6-Figure 9 As shown, both ends of the heat exchanger 20 are connected to pipe joints 30; in the embodiment where the heat exchanger 20 is not extended as a whole, such as in the embodiment where multiple bending sections 21 are connected in parallel, Figure 10-12 As shown, both ends of the bending section 21 are respectively connected with pipeline joints 30. The heat exchange element 20 or the bending section 21 can be directly connected to the pipeline joints 30 at both ends or indirectly connected.

[0126] One of the pipe joints 30 is provided with a plurality of first interfaces separated from each other, the other pipe joint 30 is provided with a plurality of second interfaces separated from each other, one end of the plurality of heat exchange channels 201 is respectively connected to the plurality of first interfaces, and the other end of the plurality of heat exchange channels 201 is respectively connected to the plurality of second interfaces.

[0127] Multiple first interfaces can all be used for the inflow of heat exchange medium, and multiple second interfaces can all be used for the outflow of heat exchange medium; or, multiple first interfaces can all be used for the outflow of heat exchange medium, and multiple second interfaces can all be used for the inflow of heat exchange medium; or, a part of the first interfaces are used for the inflow of heat exchange medium and the corresponding second interfaces are used for the outflow of heat exchange medium, and another part of the first interfaces are used for the outflow of heat exchange medium and the corresponding second interfaces are used for the inflow of heat exchange medium.

[0128] In other words, both ends of each heat exchange channel 201 respectively realize the inflow and outflow of heat exchange medium through the corresponding first interface and second interface, so that multiple heat exchange channels 201 can be connected in parallel, and the pipeline connection is simple.

[0129] According to some embodiments of the present invention, Figure 5 As shown, the heat exchange element 20 is an integrally formed flat tube.

[0130] Integrally formed means that different heat exchange sections of the heat exchanger 20 do not need to be connected by welding or other processes, but are connected together after the heat exchanger 20 is formed. For example, the heat exchanger 20 can be integrally formed by an extrusion process. This can reduce the number of connection points on the heat exchanger 20, thereby reducing the risk of heat exchange medium leakage.

[0131] Flat tube means that the cross section of the heat exchange element 20 perpendicular to the extension direction is a flat structure, for example Fig.13The dimension of the flat tube along the third direction F3 is larger than the dimension perpendicular to the third direction F3, so that the end surfaces of the flat tube perpendicular to the third direction F3 are used for heat exchange with the battery cell 11, thereby increasing the heat exchange area with the battery cell 11, improving the heat exchange efficiency and the heat exchange uniformity of the battery cell 11. The end surfaces of the flat tube along the third direction F3 can be flat or curved, and the end surfaces of the flat tube perpendicular to the third direction F3 can include flat surfaces and face the battery cell 11 for heat exchange.

[0132] According to the electric device of the second embodiment of the utility model, it includes the battery 1000 according to the above-mentioned first embodiment of the utility model, and the battery 1000 is used to provide electric energy for the electric device. Therefore, by adopting the above-mentioned battery 1000, multiple first heat exchange sections 211 are sequentially connected and connected through the second heat exchange section 212, so that the bending section 21 of the heat exchange element 20 is formed into a U-shaped structure or a serpentine structure, and the multiple first heat exchange sections 211 of the bending section 21 do not need to be separately connected to the external connection pipeline, nor do they need to be separately connected to the current collecting structure such as the collector, which simplifies the structure of the heat exchange element 20 and helps to reduce costs. It is also helpful to reduce the connection points connected to the collector, and the pipeline sealing is more reliable, which helps to reduce the risk of leakage of the heat exchange medium in the heat exchange element 20.

[0133] A battery 1000 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0134] like Figure 4-Figure 6 As shown, the battery 1000 according to the embodiment of the utility model includes a box assembly 200, 9 battery packs 10 and a heat exchanger 20. Take the first direction F1 as the left-right direction, the second direction F2 as the front-back direction, and the third direction F3 as the up-down direction as an example.

[0135] Nine battery packs 10 are arranged in the box assembly 200 along the left-right direction, and each battery pack 10 includes six battery cells 11 arranged along the front-back direction. The first side surfaces 111 of each battery cell 11 along the left-right direction are the largest surfaces.

[0136] The heat exchanger 20 is an integrally formed part and includes a bending section 21, a first lead-out section 22, and a second lead-out section 23. The two ends of the extension path of the heat exchanger 20 are respectively connected with pipe joints 30, and the two pipe joints 30 are respectively recorded as the first pipe joint 30 and the second pipe joint 30. The bending section 21 includes 9 first heat exchange sections 211 arranged at intervals in the left-right direction and 8 second heat exchange sections 212 sequentially connected to the 9 first heat exchange sections 211. The first heat exchange section 211 extends straightly in the front-to-back direction, and the second heat exchange section 212 extends straightly in the left-to-right direction. The two pipe joints 30 are located on the right side of the bending section 21 and are respectively arranged near the front and rear ends of the bending section 21; the first lead-out section 22 extends in the left-right direction and connects the front end of the first heat exchange section 211 at the rightmost end and the first pipe joint 30; the second lead-out section 23 is located on the rear side of the bending section 21 and extends in the left-right direction, and the second lead-out section 23 connects the rear end of the first heat exchange section 211 at the leftmost end and the second pipe joint 30.

[0137] The nine first heat exchange sections 211 and the nine battery packs 10 are alternately stacked from left to right in the order of one first heat exchange section 211 and one battery pack 10, and the length of the first heat exchange section 211 along the front-to-back direction is substantially equal to the length of the battery pack 10 along the front-to-back direction; the four second heat exchange sections 212 connected to the front end of the first heat exchange section 211 are located at the front side of the battery pack 10, and the four second heat exchange sections 212 connected to the rear end of the first heat exchange section 211 are located at the rear side of the battery pack 10, and the length of the second heat exchange section 212 along the left-right direction is substantially equal to the size of the battery cell 11 along the left-right direction. Both the first heat exchange section 211 and the second heat exchange section 212 are bonded to the adjacent battery cell 11 by thermally conductive adhesive.

[0138] In the above embodiment, the heat exchange structure only has connection points between the heat exchange section and the two pipe joints 30. The small number of connection points can greatly reduce the risk of leakage of the heat exchange medium. In addition, there is no need to set up a complex collector or collecting tube. The overall heat exchange structure of the battery 1000 is simple, which is conducive to reducing production costs.

[0139] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0140] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: A plurality of battery packs, wherein the plurality of battery packs are arranged along a first direction, each of the battery packs comprises a plurality of battery cells arranged along a second direction, and the first direction intersects with the second direction; A heat exchange element, wherein the heat exchange element comprises a continuously extending bending section, wherein the bending section comprises a plurality of first heat exchange sections and at least one second heat exchange section, wherein the first heat exchange section extends along the second direction, wherein the plurality of first heat exchange sections are arranged at intervals along the first direction, and wherein the at least one second heat exchange section is sequentially connected to and communicates with the plurality of first heat exchange sections, The plurality of first heat exchange sections and the plurality of battery packs are alternately stacked along the first direction, and the second heat exchange sections and the plurality of battery cells of the same battery pack are stacked along the second direction.

2. The battery according to claim 1, characterized in that The first heat exchange section is provided between any two adjacent battery groups; and / or, the battery group is provided between any two adjacent first heat exchange sections.

3. The battery according to claim 1, characterized in that The heat exchange element includes a plurality of the bending segments, the plurality of the bending segments are arranged along the first direction or the second direction, and the plurality of the bending segments are connected in series or in parallel.

4. The battery according to claim 1, characterized in that Both ends of the heat exchange element or both ends of the bending section are respectively connected with pipeline joints, and the two pipeline joints are located on the same side of the heat exchange element along the first direction, or on the same side of the heat exchange element along the second direction.

5. The battery according to claim 4, characterized in that The two pipe joints are located on the same side of the heat exchange element along the first direction, The heat exchange element further includes a first lead-out section, the first lead-out section extends along the first direction, and the first heat exchange section close to the pipe joint along the first direction is connected to the pipe joint through the first lead-out section; and / or, The heat exchange component also includes a second lead-out section, which extends along the first direction and is located on one side of the bending section along the second direction. The first heat exchange section away from the pipe joint along the first direction is connected to the pipe joint through the second lead-out section.

6. The battery according to claim 5, characterized in that The second lead-out section is separated from the second heat exchange section of the bending section by a predetermined gap.

7. The battery according to claim 1, characterized in that The first heat exchange section is in contact with the adjacent battery group surface; and / or the second heat exchange section is in contact with the adjacent battery group surface.

8. The battery according to claim 7, characterized in that The battery cell includes two first side surfaces opposite to each other along the first direction and two second side surfaces opposite to each other along the second direction, and an area of ​​the first side surface is greater than an area of ​​the second side surface.

9. The battery according to claim 1, characterized in that The bending section has a plurality of parallel heat exchange channels.

10. The battery according to claim 9, characterized in that Among the plurality of heat exchange channels, the flow directions of the heat exchange media in at least two of the heat exchange channels are opposite.

11. The battery according to claim 9, characterized in that The plurality of heat exchange channels are arranged along a third direction, and the third direction, the first direction and the second direction intersect in pairs.

12. The battery according to claim 11, characterized in that Among the plurality of heat exchange channels, the flow directions of the heat exchange media in any two adjacent heat exchange channels are opposite.

13. The battery according to claim 10, characterized in that Both ends of the heat exchange element or the bending section are respectively connected with pipe joints, one of the pipe joints is provided with a plurality of first interfaces separated from each other, and the other pipe joint is provided with a plurality of second interfaces separated from each other, one end of the plurality of heat exchange channels is respectively connected with the plurality of first interfaces, and the other end of the plurality of heat exchange channels is respectively connected with the plurality of second interfaces.

14. The battery according to any one of claims 1 to 13, characterized in that The heat exchange element is an integrally formed flat tube.

15. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 14, wherein the battery is used to provide electrical energy to the electrical device.

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