Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, the battery device comprises a box body, a plurality of battery monomers and a heat exchange assembly, the plurality of battery monomers are arranged in the box body in an array structure, each battery monomer comprises an electrode terminal and a plurality of side walls, the plurality of side walls comprise a first side wall, the electrode terminal is arranged on the first side wall, and the heat exchange assembly is arranged on the first side wall. All electrode terminals of the plurality of single batteries face the same direction, the heat exchange assembly comprises a first heat exchange part, the first heat exchange part comprises a first heat exchange piece, the first heat exchange piece and the electrode terminals are located on the same side and connected with the first side wall, a plurality of avoiding holes are formed in the first heat exchange piece, and the electrode terminal on each single battery is arranged in one avoiding hole. And the first heat exchange part and the electrode terminal of the battery monomer are arranged on the same side and occupy the space occupied by the electrode terminal, so that the situation that the first heat exchange part independently occupies the space of the box body is reduced, and the space utilization rate of the box body is improved.

Description

TECHNICAL FIELD

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

[0002] With the development of new energy, more and more fields use new energy as power. Due to the advantages of high energy density, recyclable charging, safety and environmental protection, battery devices are widely used in the fields of new energy vehicles, consumer electronics, energy storage systems and the like.

[0003] In the related art, the battery device includes a box body, a heat exchange element having a flow channel, and a plurality of battery monomers. The plurality of battery monomers and the heat exchange element are respectively arranged in the box body. The heat exchange element occupies the space in the height direction of the box body, thereby resulting in low space utilization of the box body in the height direction. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a battery device and an electric equipment, which solve the problem of low space utilization of the box body.

[0005] A first aspect of the present application provides a battery device, which comprises:

[0006] a box body;

[0007] a plurality of battery monomers arranged in an array structure in the box body, each battery monomer comprising an electrode terminal and a plurality of side walls, the plurality of side walls comprising a first side wall, the electrode terminal being arranged on the first side wall, and the electrode terminals of all the battery monomers being arranged on the same side;

[0008] a heat exchange assembly comprising a first heat exchange part, the first heat exchange part comprising a first heat exchange element, the first heat exchange element being arranged on the same side as the electrode terminals and connected to the first side wall, and a plurality of avoiding holes being arranged on the first heat exchange element, the electrode terminal of each battery monomer being arranged in one avoiding hole.

[0009] Specifically, the electrode terminals of the battery monomers occupy space in the box body. The first heat exchange part and the electrode terminals of the battery monomers are arranged on the same side, and the first heat exchange part is arranged in the space occupied by the electrode terminals. This reduces the case that the first heat exchange part occupies the space of the box body alone, thereby making the structure in the box body more compact and improving the space utilization of the box body.

[0010] In some embodiments of the present application, along the height direction of the box body, the inside of the box body comprises an inner bottom surface and an inner top surface arranged oppositely;

[0011] wherein the electrode terminals are arranged towards the inner bottom surface, or the electrode terminals are arranged towards the inner top surface.

[0012] In this way, the orientation of the electrode terminals of the battery cells is adjusted to meet the use requirements of different application scenarios, thereby increasing the application range of the battery device.

[0013] In some embodiments of the present application, the array structure is a rectangular array structure, the rectangular array structure includes a first array direction and a second array direction perpendicular to each other, in the first array direction, the rectangular array structure includes a plurality of rows, each row includes a plurality of battery cells, in the second array direction, the rectangular array structure includes a plurality of columns, each column includes a plurality of battery cells, wherein one of the first array direction and the second array direction is the length direction of the box, and the other is the width direction of the box. In this way, the layout of the plurality of battery cells in the box is facilitated, the convenience of assembling the battery cells is improved, and the space utilization in the box is maximized.

[0014] In some embodiments of the present application, the heat exchange assembly further includes a second heat exchange part, the second heat exchange part includes a plurality of second heat exchange pieces, at least one second heat exchange piece is arranged between two adjacent battery cells, and the second heat exchange piece is in thermal connection with the two adjacent battery cells.

[0015] In this way, the effective heat exchange of the battery cells in the rectangular array structure can be further improved, and the heat exchange effect is further improved.

[0016] In some embodiments of the present application, the second heat exchange piece is arranged along the first array direction, and at least part of the battery cells in the two adjacent columns are respectively in thermal connection with the second heat exchange piece. In this way, the second heat exchange piece is used to exchange heat for the battery cells in the two adjacent columns, that is, one component is used to exchange heat for a plurality of battery cells, thereby the structure of the heat exchange assembly can be simplified, the space in the box is occupied, the space utilization in the box is improved, and the manufacturing cost is reduced.

[0017] In some embodiments of the present application, the plurality of side walls further includes a second side wall, the second side wall is arranged intersecting with the first side wall, among the plurality of side walls, the second side wall is the largest side wall, and the second side wall is in thermal connection with the second heat exchange piece. In this way, the contact area of the battery cells and the second heat exchange piece can be increased, and the heat exchange efficiency of the second heat exchange piece for the battery cells is further improved.

[0018] In some embodiments of the present application, the second heat exchange member is arranged along the second array direction, and at least a part of the battery cells arranged in the two adjacent rows are respectively in heat conduction connection with the second heat exchange member. In this way, the battery cells arranged in the two adjacent rows are heat exchanged by the second heat exchange member, that is, the heat exchange of a plurality of battery cells is realized by one component, thereby simplifying the structure of the heat exchange assembly, reducing the occupation of the space in the box, improving the space utilization in the box, and reducing the manufacturing cost.

[0019] In some embodiments of the present application, the plurality of side walls further include a second side wall and a third side wall, the second side wall and the third side wall are respectively arranged in intersection with the first side wall, among the plurality of side walls, the second side wall is the side wall with the largest area, and the third side wall is in heat conduction connection with the second heat exchange member. In this way, an expansion space is provided for the battery cells during use, thereby improving the safety performance of the battery device.

[0020] In some embodiments of the present application, the first heat exchange member is a first plate-shaped member, and the thickness direction of the first plate-shaped member is consistent with the height direction of the box.

[0021] And / or, the second heat exchange member is a second plate-shaped member, and the arrangement direction of the two battery cells arranged in adjacent positions and connected with the second heat exchange member is consistent with the thickness direction of the second plate-shaped member.

[0022] In this way, the occupation of the internal space of the box can be further reduced, and the space utilization in the box can be improved.

[0023] In some embodiments of the present application, at least one of the first heat exchange member and the second heat exchange member includes a medium flow channel for accommodating a heat exchange medium.

[0024] In this way, the heat exchange efficiency of the battery cells can be improved, and the heat exchange effect is effectively improved.

[0025] In some embodiments of the present application, the first heat exchange member and the second heat exchange member both include a medium flow channel, and the heat exchange assembly further includes a flow collecting member in communication with the medium flow channel of the first heat exchange member and the medium flow channel of the second heat exchange member. In this way, the flow collecting member can realize the communication of the first heat exchange member and the second heat exchange member, thereby facilitating the unified layout of the heat exchange assembly, and further improving the assembly convenience.

[0026] In some embodiments of the present application, the first heat exchange member includes a medium flow channel, and the medium flow channel includes a first flow channel portion, the first flow channel portion extends along the second array direction, and at least one first flow channel portion is arranged corresponding to each row.

[0027] In this way, the first flow channel part is shared by all the battery monomers in each row, so that the heat exchange of all the battery monomers in each row can be effectively realized, and the heat exchange effect is improved.

[0028] In some embodiments of the present application, the medium flow channel further comprises a second flow channel part extending along the first array direction, and each battery monomer in each row is correspondingly provided with at least one second flow channel part, and the two ends of the second flow channel part are respectively connected with the two first flow channel parts arranged adjacently. In this way, the contact area with the battery monomer is further increased, and the heat exchange effect of the battery monomer is further improved.

[0029] In some embodiments of the present application, the battery monomer further comprises a pressure relief mechanism.

[0030] The pressure relief mechanism is arranged on the first side wall, the avoidance hole has a projection on the first side wall, and the pressure relief mechanism is located in the area where the projection is located; or the pressure relief mechanism is arranged on one of the plurality of side walls, and the pressure relief mechanism and the electrode terminal are arranged on different side walls.

[0031] The arrangement of the pressure relief mechanism can improve the safety performance of the battery monomer, thereby improving the safety performance of the battery device. In addition, by arranging the position of the pressure relief mechanism, the application scenarios of the battery device can be increased.

[0032] In some embodiments of the present application, the pressure relief mechanism is arranged on the first side wall, the electrode terminal comprises a first electrode terminal and a second electrode terminal arranged at intervals, and the first electrode terminal and the second electrode terminal are arranged at intervals on opposite sides of the pressure relief mechanism, and the center distance between the first electrode terminal and the second electrode terminal is in the range of 50 mm to 200 mm.

[0033] In this way, the first side wall can provide more space for the first heat exchange part, so as to increase the contact area between the first heat exchange part and the first side wall, and further improve the heat exchange efficiency of the first heat exchange part on the battery monomer.

[0034] In some embodiments of the present application, the center distance between the first electrode terminal and the second electrode terminal is in the range of 60 mm to 100 mm.

[0035] In this way, by further controlling the distance between the first electrode terminal and the second electrode terminal, the space outside the first electrode terminal and the second electrode terminal on the first side wall is larger, so as to increase the contact area between the first heat exchange part and the first side wall, and further improve the heat exchange efficiency of the first heat exchange part on the battery monomer.

[0036] In some embodiments of the present application, the pressure relief mechanism is arranged on one of the plurality of side walls, and the pressure relief mechanism and the electrode terminals are arranged on different side walls, the electrode terminals including a first electrode terminal and a second electrode terminal arranged at intervals, and the center distance between the first electrode terminal and the second electrode terminal is in a range of 30 mm to 200 mm.

[0037] In this way, without adversely affecting the first electrode terminal, the second electrode terminal and the pressure relief mechanism, the first side wall can provide more space for the first heat exchange part, so as to increase the contact area between the first heat exchange part and the first side wall, and further improve the heat exchange efficiency of the first heat exchange part on the battery cell.

[0038] In some embodiments of the present application, the center distance between the first electrode terminal and the second electrode terminal is in a range of 40 mm to 80 mm. In this way, by further controlling the distance between the first electrode terminal and the second electrode terminal, the space outside the first electrode terminal and the second electrode terminal on the first side wall can be larger, so as to increase the contact area between the first heat exchange part and the first side wall, and further improve the heat exchange efficiency of the first heat exchange part on the battery cell.

[0039] In some embodiments of the present application, the avoiding hole has a projection on the first side wall, the electrode terminal is located in the area where the projection is located, and the minimum distance between the electrode terminal and the edge of the projection is greater than or equal to 5 mm.

[0040] In this way, the avoiding hole can effectively avoid the pressure relief mechanism, so that the pressure relief mechanism can be smoothly opened for pressure relief operation.

[0041] In some embodiments of the present application, the heat exchange assembly further includes a heat-conducting adhesive layer, and the first heat exchange member is connected to the first side wall of each battery cell through the heat-conducting adhesive layer.

[0042] In this way, the heat exchange uniformity of the first heat exchange member on each battery cell can be effectively improved, and thus the heat exchange effect is effectively improved.

[0043] The second aspect of the present application provides a power consumption device, which includes the above battery device.

[0044] In the battery device of the power consumption device, the electrode terminal of the battery cell occupies space in the box body, the first heat exchange part and the electrode terminal of the battery cell are arranged on the same side, and the first heat exchange part is arranged in the space occupied by the electrode terminal, so as to reduce the case that the first heat exchange part occupies the space of the box body alone, thereby making the structure in the box body more compact, and improving the space utilization rate of the box body.

[0045] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 A structural schematic diagram of a vehicle according to an embodiment of the present application is schematically shown;

[0047] Figure 2 A structural schematic diagram of a battery device according to an embodiment of the present application is schematically shown;

[0048] Figure 3 A partial structural schematic diagram of a battery device according to an embodiment of the present application is schematically shown;

[0049] Figure 4 An exploded structural schematic diagram of the battery device shown in Figure 3

[0050] A structural schematic diagram of a heat exchange assembly shown in Figure 5 Figure 4 A sectional view of A-A of the heat exchange assembly shown in

[0051] Figure 6 Figure 4 A partial structural schematic diagram of a battery device according to an embodiment of the present application is schematically shown;

[0052] Figure 7 A structural schematic diagram of a heat exchange assembly shown in

[0053] Figure 8 A structural schematic diagram of a heat exchange assembly shown in Figure 7

[0054] A partial structural schematic diagram of a battery device according to an embodiment of the present application is schematically shown; Figure 9

[0055] A structural schematic diagram of a heat exchange assembly shown in Figure 10 Figure 9

[0056] Reference signs are as follows:

[0057] 1000, vehicle;

[0058] 100, battery device; 200, controller; 300, motor;

[0059] 10, box;

[0060] 11, first box; ​​​​

[0061] 12, second box; 121, inner bottom surface;

[0062] 20, battery cell;

[0063] 21, first side wall; 22, electrode terminal; 221, first electrode terminal; 222, second electrode terminal; 23, second side wall;

[0064] 30, heat exchange assembly;

[0065] 31, first heat exchange part; 311, first heat exchange piece; 3111, avoiding hole; 3112, second plate body; 3113, first plate body; 3114, medium flow channel; 3115, first flow channel part; 3116, second flow channel part; 32, second heat exchange part; 321, second heat exchange piece; 33, heat conductive adhesive layer;

[0066] X, first array direction; Y, second array direction; Z, height direction. DETAILED DESCRIPTION

[0067] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having," and any variations thereof, as used herein are intended to cover a non-exclusive inclusion.

[0069] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0070] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can 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 all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0071] In the description of the embodiments of the present application, the term "and / or" is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0072] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0073] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0074] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0075] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to energy storage power systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the demand of its market is also increasing.

[0076] In the related art, the battery device includes a box body, a heat exchange element having a flow channel, and a plurality of battery monomers. The plurality of battery monomers and the heat exchange element are arranged in the box body. The heat exchange element occupies the space in the height direction of the box body, thereby causing low space utilization of the box body in the height direction.

[0077] To address the aforementioned issues, this application provides a battery device comprising a housing, multiple battery cells, and a heat exchange assembly. The multiple battery cells are arranged in an array within the housing. Each battery cell includes electrode terminals and multiple sidewalls, including a first sidewall on which the electrode terminals are located. All electrode terminals of the multiple battery cells face the same direction. The heat exchange assembly includes a first heat exchange section, which in turn includes a first heat exchange element. The first heat exchange element is located on the same side as the electrode terminals and connected to the first sidewall. The first heat exchange element has multiple clearance holes, and the electrode terminals of each battery cell are disposed within one clearance hole. By placing the electrode terminals of the battery cells on the same side within the space occupied by the electrode terminals, the space occupied by the first heat exchange section is reduced, thus making the structure within the housing more compact and improving the space utilization of the housing.

[0078] The technical solutions described in this application are not limited to the devices described above, but can also be applied to all devices that use battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0079] For example, such as Figure 1 The diagram shown is a structural schematic of a vehicle 1000 according to one embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle's interior can include a motor 300, a controller 200, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, it can serve as the vehicle's operating power source for the vehicle's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0080] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0081] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0082] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells by a cable tie.

[0083] In some embodiments, the battery device can be a battery pack, which includes a box and one or more battery cell assemblies, the battery cell assemblies being accommodated in the box.

[0084] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0085] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0086] As an example, the box can include a first box and a second box. The first box and the second box are buckled so that a closed space is formed inside the box to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0087] As an example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that a closed space is formed inside the box to accommodate the battery cell assembly.

[0088] In some embodiments, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0089] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc.

[0090] In some embodiments of the present application, the battery cell can be a secondary battery, which means that the battery cell can be activated by charging after discharging to continue to be used.

[0091] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0092] In some embodiments of the present application, the battery cell includes a housing, a pressure relief mechanism, an electrode assembly, and an insulating member. The housing includes a plurality of side walls, including a first side wall, and the pressure relief mechanism is disposed on the first side wall and configured to open or close according to whether an internal pressure of the housing reaches a pressure threshold. The electrode assembly is disposed inside the housing, and the insulating member is disposed inside the housing and between the housing and the electrode assembly to insulate and separate the housing and the electrode assembly, and abuts the electrode assembly.

[0093] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes, and the prismatic battery cell includes a square battery cell, a blade battery cell, a multi-prismatic battery cell, such as a hexagonal battery cell, etc., without particular limitation.

[0094] The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator disposed between the positive electrode and the negative electrode can prevent short circuiting of the positive electrode and the negative electrode while allowing the active ions to pass through.

[0095] In some embodiments, the positive electrode can be a positive electrode sheet, which can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0096] As an example, the positive electrode current collector has two opposite surfaces in the thickness direction thereof, and the positive electrode active material is disposed on either one or both of the two opposite surfaces of the positive electrode current collector.

[0097] As an example, the positive electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0098] As an example, the positive electrode active material can include at least one of a lithium-containing phosphate, a lithium transition metal oxide, and a modified compound of each thereof. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material can also be used. These positive electrode active materials can be used alone only or in combination of two or more. Among them, examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (such as LiFeP04(also referred to as LFP for short)), a composite of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnP04), a composite of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and a composite of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can include, but are not limited to, at least one of lithium cobalt oxide (such as LiCo02), lithium nickel oxide (such as LiNi02), lithium manganese oxide (such as LiMn02, LiMn204), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2(also referred to as NCM 333 for short), LiNi 0.5 Co 0.2 Mn 0.3 O2(also referred to as NCM 523 for short), LiNi 0.5 Co 0.25 Mn 0.25 O2(also referred to as NCM 211 for short), LiNi 0.6 Co 0.2 Mn 0.2 O2(also referred to as NCM 622 for short), LiNi 0.8 Co 0.1 Mn 0.1 O2(also referred to as NCM 811 for short), lithium nickel cobalt aluminum oxide (such as LiNi 0.8 Co 0.15 Al 0.05 O2), and a modified compound thereof. The modified compound refers to a substance obtained by a modification means such as doping or coating on the basis of the above-mentioned substance.

[0099] In some embodiments, the positive electrode can employ a foam metal. The foam metal can be a foam nickel, a foam copper, a foam aluminum, a foam alloy, or a foam carbon, etc. When the foam metal is used as the positive electrode, the foam metal surface can not be provided with the positive electrode active material, or of course can be provided with the positive electrode active material. As an example, the positive electrode active material is filled or / and deposited in the foam metal.

[0100] In some embodiments, the negative electrode can be a negative electrode sheet, which can include a negative electrode current collector.

[0101] As an example, the negative electrode current collector can employ a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver, etc. can be employed. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0102] As an example, the negative electrode sheet can include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0103] As an example, the negative electrode current collector has two surfaces opposite in the thickness direction thereof, and the negative electrode active material is disposed on either one or both of the two opposite surfaces of the negative electrode current collector.

[0104] As an example, the negative electrode active material can employ a negative electrode active material for a battery cell known in the art. As an example, the negative electrode active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as a negative electrode active material for a battery cell can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0105] In some embodiments, the negative electrode can employ a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When the foamed metal is used as a negative electrode sheet, the surface of the foamed metal can not be provided with a negative electrode active material, or can be provided with a negative electrode active material.

[0106] As an example, the negative electrode active material can be filled and / or deposited in the negative electrode current collector.

[0107] In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0108] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0109] In some embodiments, the separator is a separator film. The type of the separator film is not particularly limited in the present application, and any known porous separator film having good chemical stability and mechanical stability can be used.

[0110] For example, the main material of the separator film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator film can be a single layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of the respective layers can be the same or different, and are not particularly limited. The separator can be a separate member located between the positive and negative electrodes, or can be attached to the surface of the positive and negative electrodes. An inorganic particle coating layer, an organic particle coating layer, or an organic / inorganic composite coating layer can be applied to the surface of the separator film.

[0111] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, and functions to transport ions and separate the positive and negative electrodes.

[0112] The electrode assembly can have a jelly-roll structure, a stack structure, or a hybrid structure of the jelly-roll and stack structures.

[0113] In some embodiments, the electrode assembly has a jelly-roll structure. The positive electrode sheet and the negative electrode sheet are wound to form the jelly-roll structure.

[0114] In some embodiments, the electrode assembly has a stack structure.

[0115] For example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be alternately stacked.

[0116] For example, a plurality of positive electrode sheets can be provided, and the negative electrode sheet can be folded to form a plurality of folded sections stacked one on another, with one positive electrode sheet interposed between adjacent folded sections.

[0117] For example, both the positive electrode sheet and the negative electrode sheet can be folded to form a plurality of folded sections stacked one on another.

[0118] For example, a plurality of separators can be provided, and each of the plurality of separators can be interposed between any adjacent positive electrode sheet or negative electrode sheet.

[0119] For example, the separators can be continuously provided and interposed between any adjacent positive electrode sheet or negative electrode sheet by folding or winding.

[0120] In some embodiments, the electrode assembly can have a cylindrical shape, a flat shape, or a polygonal shape.

[0121] In some embodiments, the electrode assembly can include tabs. The tabs can be used to extract current from the electrode assembly. The tabs can include positive tabs and negative tabs.

[0122] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is configured to release the internal gas of the battery cell.

[0123] As an example, the pressure relief mechanism is actuated to release the internal pressure or temperature of the battery cell when the internal pressure or temperature of the battery cell reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is broken, thereby forming an opening or a passage for the internal pressure or temperature to be released. The threshold is designed differently according to the design requirements. The threshold can depend on the material of one or more of the positive electrode sheet, the negative electrode sheet, the electrolyte, and the separator in the battery cell.

[0124] As an example, the pressure relief mechanism can be integrally formed with the housing.

[0125] As an example, the pressure relief mechanism can also be provided separately from the housing and connected to the housing.

[0126] As used herein, "actuated" refers to the pressure relief mechanism performing an action or being activated to a certain state, thereby allowing the internal pressure and temperature of the battery cell to be released. The action performed by the pressure relief mechanism can include, but is not limited to, a component in the pressure relief mechanism moving to form an exhaust passage, at least a portion of the pressure relief mechanism breaking, shattering, being torn or opened, and the like. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell are discharged as exhaust from the actuated part. In this way, the battery cell can be pressure released and temperature released under controllable pressure or temperature, thereby reducing the potential for more serious accidents.

[0127] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be provided as a through hole for releasing the internal gas of the battery cell.

[0128] As used herein, the exhaust from the battery cell includes, but is not limited to, electrolyte, dissolved or split positive and negative electrode sheets, fragments of the separator, high-temperature and high-pressure gas generated by the reaction, flames, and the like.

[0129] The positive and negative tabs can be led out from the same end of the electrode sheet, or can be led out from opposite ends of the electrode sheet, respectively.

[0130] The positive and negative tabs can have the same or different structures. As an example of the positive tab, the positive tab can include a plurality of positive tab layers stacked together to form the positive tab. The positive tab can include at least two portions, one portion between the main body of the electrode sheet and the insulating member, and the other portion between the insulating member and the electrode lead-out member.

[0131] The insulating piece can insulate at least part of the tab from the end face of the body part, thereby reducing the risk of the tab being inserted into the body part when the battery cell is affected by external impact, vibration, etc., and thus reducing the risk of short circuit of the battery cell, which is conducive to improving the reliability of the battery cell.

[0132] The insulating piece can be of an integral structure or a split structure. As an example, the insulating piece is connected by multiple independently formed parts. As another example, the insulating piece is integrally formed by stamping.

[0133] For example, the insulating piece is a plastic piece, and the plastic piece is integrally formed by injection molding. The plastic piece is convenient to process, and the manufacturing cost of the plastic piece is relatively low.

[0134] In some embodiments of the present application, the shell includes a housing and an end cover, the housing has an opening, the end cover is connected to the housing and closes the opening, the end cover constitutes a first side wall, and the pressure relief mechanism is arranged on the end cover.

[0135] In some embodiments of the present application, the shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc. In some embodiments, the shell can be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell serves to protect the electrode assembly, and a sealing bag is further included between the shell and the electrode assembly, which is used to package the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating piece or an aluminum-plastic film. When the shell is a sealed structure, it is used to package the electrode assembly, the electrolyte, etc. The housing can be provided with one or more openings. The end cover can also be provided with one or more openings.

[0136] In addition, the connection mode between the end cover and the housing includes but is not limited to clamping, bonding, welding, or connecting through a connecting piece.

[0137] In some embodiments of the present application, the battery cell further includes an electrode terminal, which is arranged on the end cover and electrically connected to the electrode assembly. The electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collecting member. The electrode terminal can be arranged on the end cover or on the housing. In the embodiments shown in the present application, the electrode terminal is arranged on the end cover.

[0138] For example, the electrode terminal is a metal terminal, and the metal terminal is integrally formed with the end cover by stamping. The metal terminal is convenient to process, and the manufacturing cost of the metal terminal is relatively low. Figures 2 to 10As shown, in some embodiments of this application, a battery device is proposed. The battery device includes a housing 10, a plurality of battery cells 20, and a heat exchange assembly 30. The plurality of battery cells 20 are arranged in an array within the housing 10. Each battery cell 20 includes a plurality of sidewalls and electrode terminals 22. The plurality of sidewalls includes a first sidewall 21. The electrode terminals 22 are disposed on the first sidewall 21. All electrode terminals 22 of the plurality of battery cells 20 have the same orientation. The heat exchange assembly 30 includes a first heat exchange portion 31. The first heat exchange portion 31 includes a first heat exchange element 311. The first heat exchange element 311 is located on the same side as the electrode terminals 22 and is connected to the first sidewall 21. The first heat exchange element 311 is provided with a plurality of clearance holes 3111. The electrode terminals 22 of each battery cell 20 are disposed within one clearance hole 3111. The heat exchange assembly 30 includes a first heat exchange portion 31, which is located on the same side as the electrode terminal 22 and connected to the first sidewall 21. The first heat exchange portion 31 is spaced apart from the electrode terminal 22 and can exchange heat with the battery cell 20. On the same battery cell 20, the first heat exchange portion 31 is located further away from the center position p of the first sidewall 21 than the electrode terminal 22.

[0139] In this embodiment, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to accommodate the battery cells 20. An open receiving slot is formed inside the second housing 12, and multiple battery cells 20 and heat exchange components 30 are respectively disposed within the receiving slot. The first housing 11 is a cover structure (it can be a flat plate or a pressed structure), and the first housing 11 is connected to the second housing 12 (the connection method includes, but is not limited to, bonding, welding, or connection via connectors) and closes the opening of the receiving slot.

[0140] like Figure 2 As shown, the following explanation will be based on the example of a rectangular structure for box 10. The arrangement of the first box 11 and the second box 12 is the height direction Z of box 10. Both the first box 11 and the second box 12 are rectangular structures. The length direction of the second box 12 is the length direction of box 10, and the height direction Z of the second box 12 is the width direction of box 10.

[0141] The battery cell 20 includes multiple sidewalls, and the first sidewall 21 is one of the multiple sidewalls. In the height direction Z of the housing 10, the first sidewall 21 is disposed facing the first housing 11 or facing the second housing 12. The first sidewall 21 is a structure disposed on the housing of the battery cell 20, or it can be an end cap of the housing.

[0142] The electrode terminal 22 is protrudingly arranged on the first side wall 21, and the electrode terminal 22 is arranged along the height direction Z of the box body 10, and the electrode terminal 22 of the battery cell 20 occupies the space in the height direction Z of the box body 10 in the box body 10 to meet the installation requirement of the battery cell 20.

[0143] In the present application, the first heat exchange part 31 is arranged on the same side as the electrode terminal 22 of the battery cell 20, and the first heat exchange part 31 is arranged in the space occupied by the electrode terminal 22, which reduces the case that the first heat exchange part 31 occupies the space of the box body 10 alone, so that the structure in the box body 10 is more compact, and the space utilization rate of the box body 10 is improved.

[0144] It should be understood that in the present application, the first heat exchange part 31 can exchange heat with the battery cell 20 through the first side wall 21, wherein the heat exchange mode can only cool the battery cell 20, only heat the battery cell 20, or both cool and heat the battery cell 20.

[0145] In the present application, the plurality of battery cells 20 are arranged in an array structure in the box body 10, and in the array structure, some battery cells 20 can form a battery cell assembly to form a plurality of battery cell assemblies, or all battery cells 20 can form a battery cell assembly.

[0146] It should be pointed out that the electrode terminal 22 is arranged in the avoiding hole 3111 of the first heat exchange part 311, and the electrode terminal 22 and the hole wall of the avoiding hole 3111 can be attached or spaced.

[0147] The first heat exchange part 311 can be a metal part (such as an iron part, a copper part, an aluminum part, or a stainless steel part), or a non-metal part (a part with heat conduction performance, such as a graphite part).

[0148] In the present application, the first heat exchange part 311 is a metal part, the electrode terminal 22 is an electrified component, the electrode terminal 22 is spaced from the hole wall of the avoiding hole 3111 in the avoiding hole, and the spacing distance meets the insulation requirement. In addition, an insulation structure (such as an insulating glue or an insulating part) can be arranged between the electrode terminal 22 and the hole wall of the avoiding hole 3111 to improve the insulation effect.

[0149] It should be pointed out that the first heat exchange part 311 is connected with the first side wall 21 of the battery cell 20, and the two can be directly connected or indirectly connected, and the battery cell 20 can exchange heat with the first heat exchange part 311 through the first side wall 21, so that the first heat exchange part 311 is used to adjust the temperature of the battery cell 20, so that the battery can be in the optimal working temperature range.

[0150] The plurality of battery cells 20 arranged in the box body 10 are arranged in an array structure, which includes but is not limited to a rectangular array structure, a circular array structure or other forms of array structures.

[0151] In addition, the first distance between the first heat exchange member 311 and the first side wall 21 and the second distance between the electrode terminal 22 and the first side wall 21 satisfy the condition that the difference between the first distance and the second distance is greater than or equal to zero and less than or equal to 10 mm (for example, it can be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm). In this way, the first heat exchange part can have sufficient heat exchange capacity on the basis of reducing the space occupied in the height direction Z of the box body 10.

[0152] In some embodiments of the present application, along the height direction Z of the box body 10, the inside of the box body 10 includes the oppositely arranged inner bottom surface 121 (as shown in Figures 2 to 4 ) and the inner top surface (not shown in the figure). Wherein the electrode terminal 22 is arranged towards the inner bottom surface 121, or the electrode terminal 22 is arranged towards the inner top surface.

[0153] Specifically, the box body 10 is formed by buckling the first box body 11 and the second box body 12, and the arrangement direction of the first box body 11 and the second box body 12 is the thickness direction of the box body 10. Wherein the first box body 11 is arranged above the second box body 12, the inner top surface is formed on the side of the first box body 11 facing the second box body 12, and the inner bottom surface 121 is formed on the side of the second box body 12 facing the first box body 11.

[0154] The electrode terminals 22 of all the battery cells 20 are located on the same side, and the electrode terminals 22 can be arranged to face the inner top surface or the inner bottom surface 121. In this way, by adjusting the orientation of the electrode terminals 22 of the battery cells 20 to meet the use requirements of different application scenarios, the application range of the battery device is increased.

[0155] In some embodiments of the present application, as shown in Figures 2 to 4 , and Figure 7 , and Figure 9 The array structure shown in the figure is a rectangular array structure, which includes a first array direction X and a second array direction Y perpendicular to each other. In the first array direction X, the rectangular array structure includes a plurality of rows, and each row includes a plurality of battery cells 20. In the second array direction Y, the rectangular array structure includes a plurality of columns, and each column includes a plurality of battery cells 20. Wherein one of the first array direction X and the second array direction Y is the length direction of the box body 10, and the other is the width direction of the box body 10.

[0156] Specifically, in the present application, the box body 10 is of a rectangular structure, and the plurality of battery monomers 20 are arranged inside the box body 10 and form an array structure. By arranging the array structure as a rectangular array structure, the array structure formed by the plurality of battery monomers 20 can be more adapted to the structure of the box body 10, so as to fully utilize the space of the box body 10, thereby maximizing the space utilization of the box body 10 and improving the space utilization of the box body 10.

[0157] In addition, by arranging the array structure as a rectangular array structure, the layout and installation of the plurality of battery monomers 20 in the box body 10 are facilitated, thereby improving the convenience in the assembly process and improving the efficiency of the assembly, and further speeding up the production rhythm.

[0158] It should be understood that in the rectangular array structure, along the first array direction X, a plurality of rows are included, and the number of the plurality of rows can be two, three, four, five, six, seven, eight, nine, ten, etc.

[0159] In the rectangular array structure, along the second array direction Y, a plurality of columns are included, and the number of the plurality of columns can be two, three, four, five, six, seven, eight, nine, ten, etc.

[0160] In some embodiments of the present application, as shown in Figures 7 to 10 The heat exchange assembly 30 further includes a second heat exchange part 32, the second heat exchange part 32 includes a plurality of second heat exchange pieces 321, and at least one second heat exchange piece 321 is arranged between two adjacent battery monomers 20, and the second heat exchange piece 321 is in thermal connection with the two adjacent battery monomers 20.

[0161] Specifically, the thermal connection between the second heat exchange piece 321 and the two adjacent battery monomers 20 means that the second heat exchange piece 321 can exchange heat with the two adjacent battery monomers 20, and the second heat exchange piece 321 can be used to heat the battery monomers 20, cool the battery monomers 20, or both heat and cool the battery monomers 20.

[0162] The second heat exchange piece 321 in the second heat exchange part 32 is arranged between the two adjacent battery monomers 20, and the second heat exchange piece 321 is used to exchange heat with the two adjacent battery monomers 20. On the basis of the first heat exchange part 31, the second heat exchange part 32 is added, and such arrangement can further improve the effective heat exchange of the battery monomers 20 in the rectangular array structure, and the heat exchange effect is further improved.

[0163] It should be noted that the second heat exchange member 321 can be directly attached to the battery monomer 20, and the two can exchange heat with each other; the second heat exchange member 321 and the battery monomer 20 can also be attached together through a heat-conducting adhesive, and the two can exchange heat with each other through the heat-conducting adhesive.

[0164] In some embodiments of the present application, as shown in Figure 7 and Figure 8 , the second heat exchange member 321 is arranged along the first array direction X, and at least part of the battery monomers 20 in each of the two columns arranged adjacently are respectively in heat-conducting connection with the second heat exchange member 321.

[0165] Specifically, the second heat exchange member 321 exchanges heat with the battery monomers 20 in the two columns arranged adjacently, that is, one component is used to exchange heat with multiple battery monomers 20, thereby simplifying the structure of the heat exchange assembly 30, reducing the occupation of the space in the box 10, improving the space utilization rate in the box 10, and reducing the manufacturing cost.

[0166] It should be understood that in the first array direction X, the heat exchange area of the same second heat exchange member 321 with the battery monomers 20 in the two columns arranged adjacently can be equal or not equal.

[0167] In some embodiments of the present application, as shown in Figure 7 , the plurality of side walls further comprises a second side wall 23, the second side wall 23 is arranged intersecting with the first side wall 21, among the plurality of side walls, the second side wall 23 is the side wall with the largest area, and the second side wall 23 is in heat-conducting connection with the second heat exchange member 321. In this way, the contact area of the battery monomer 20 and the second heat exchange member 321 can be increased, and the heat exchange efficiency of the second heat exchange member 321 on the battery monomer 20 can be further improved.

[0168] Specifically, the second side wall 23 is arranged intersecting with the first side wall 21 (the angle between the two is greater than 0 degrees and less than 180 degrees, for example, it can be 90 degrees, etc.), by heat-conducting connecting the "large surface (the second side wall 23, that is, the side wall with the largest area)" of the battery monomer 20 with the second heat exchange member 321, the contact area of the battery monomer 20 and the second heat exchange member 321 can be increased, and the heat exchange efficiency of the second heat exchange member 321 on the battery monomer 20 can be further improved.

[0169] In some embodiments of the present application, as shown in Figure 9 and Figure 10 , the second heat exchange member 321 is arranged along the second array direction Y, and at least part of the battery monomers 20 in each of the two rows arranged adjacently are respectively in heat-conducting connection with the second heat exchange member 321.

[0170] Specifically, the battery cells 20 in two adjacent columns are heat-exchanged by the second heat exchange member 321, that is, heat exchange of multiple battery cells 20 is realized by one component, so that the structure of the heat exchange assembly 30 can be simplified, the space in the box body 10 is occupied, the space utilization in the box body 10 is improved, and the manufacturing cost is reduced.

[0171] It should be understood that, in the second array direction Y, the heat exchange area of the same second heat exchange member 321 with the battery cells 20 in two adjacent rows can be equal or not equal.

[0172] In some embodiments of the present application, as shown in Figure 9 The plurality of side walls further include a second side wall 23 and a third side wall, and the second side wall 23 and the third side wall are arranged to intersect the first side wall 21, among the plurality of side walls, the second side wall 23 is the largest side wall, and the third side wall is in thermal connection with the second heat exchange member 321.

[0173] Specifically, during use of the battery device 100, the battery cells 20 will expand, and the expansion position usually occurs on the largest side wall. The second heat exchange member 321 is in thermal connection with the third side wall, which can provide expansion space for the battery cells 20 during use, thereby improving the safety performance of the battery device 100.

[0174] In some embodiments of the present application, as shown in Figure 4 The first heat exchange member 311 is a first plate-shaped member, and the thickness direction of the first plate-shaped member is consistent with the height direction Z of the box body 10.

[0175] In this way, the internal space of the box body 10 can be further occupied, and the space utilization in the box body 10 can be improved.

[0176] In some embodiments of the present application, the second heat exchange member 321 is a second plate-shaped member, and the arrangement direction of the two adjacent battery cells 20 in thermal connection with the second heat exchange member 321 is consistent with the thickness direction of the second plate-shaped member.

[0177] In this way, the internal space of the box body 10 can be further occupied, and the space utilization in the box body 10 can be improved.

[0178] In some embodiments of the present application, at least one of the first heat exchange member 311 and the second heat exchange member 321 includes a medium flow channel for accommodating a heat exchange medium.

[0179] Specifically, by arranging the medium flow channel on at least one of the first heat exchange member 311 and the second heat exchange member 321, the battery is heat-exchanged by the heat exchange medium, which can improve the heat exchange efficiency of the battery monomer 20, so that the heat exchange effect is effectively improved.

[0180] In some embodiments of the present application, as shown in Figure 6 The first heat exchange member 311 includes a medium flow channel 3114, and the medium flow channel 3114 includes a first flow channel part 3115 extending along the second array direction Y, and each row is provided with at least one first flow channel part 3115.

[0181] Specifically, the first flow channel part 3115 is arranged inside the first heat exchange member 311, and the first flow channel part 3115 is arranged extending along the second array direction. All battery monomers in the same row can be heat-exchanged with the heat exchange medium in the first flow channel part 3115, wherein the number of first flow channel parts 3115 heat-exchanged with the battery monomers in the same row can be one or more (two or more). When the number of first flow channel parts 3115 is more than one, the multiple first flow channels are arranged in parallel and spaced apart, for example, two first flow channel parts 3115 are arranged corresponding to the battery monomers in each row, and the electrode terminals 22 of the battery monomers are arranged spaced apart between the two first flow channel parts 3115 along the first array direction X.

[0182] By arranging the first flow channel part 3115, all battery monomers in each row can share one first flow channel part 3115, so that the heat exchange of all battery monomers in each row can be effectively realized, and the heat exchange effect is improved.

[0183] In addition, when the number of first flow channel parts 3115 is more than one, the heat exchange area with the battery monomers can be increased, so that the heat exchange effect of the battery monomers is improved.

[0184] In some embodiments of the present application, as shown in Figure 6 The medium flow channel 3114 further includes a second flow channel part 3116 extending along the first array direction X, and each battery monomer in each row is provided with at least one second flow channel part 3116, and the two ends of the second flow channel part 3116 are respectively connected and arranged in communication with two first flow channel parts 3115 arranged adjacent to each other.

[0185] Specifically, the second flow channel part 3116 is arranged inside the first heat exchange member 311, and the second flow channel part 3116 is arranged in a first array manner, and each battery cell in the same row can exchange heat with the heat exchange medium in the second flow channel part 3116, wherein the number of second flow channel parts 3116 that exchange heat with each battery cell in the same row can be one or more (two or more), when the number of second flow channel parts 3116 is more, the multiple second flow channels are arranged in parallel and spaced apart, for example, each row of battery cells is provided with two second flow channel parts 3116, and in the second array direction Y, the electrode terminals 22 of the battery cells are arranged in the two second flow channel parts 3116.

[0186] By arranging the second flow channel part 3116, the contact area with the battery cell can be further increased, so that the heat exchange effect of the battery cell is further improved.

[0187] In some embodiments of the present application, the first heat exchange member 311 and the second heat exchange member 321 each include a medium flow channel, and the heat exchange assembly 30 further includes a flow collecting member, which is in communication with the medium flow channel 3114 of the first heat exchange member 311 and the medium flow channel of the second heat exchange member 321, respectively.

[0188] Specifically, in the present application, the first heat exchange part 31 and the second heat exchange part 32 are in communication with the second heat exchange part, the second heat exchange part is in communication with the external cooling system, the heat exchange medium flows into the first heat exchange part 31 and the second heat exchange part 32 through the second heat exchange part, and the heat exchange medium after the first heat exchange part 31 and the second heat exchange part 32 exchange heat with the battery cell 20 flows back to the cooling system through the second heat exchange part.

[0189] By arranging the second heat exchange part, the first heat exchange part 31 and the second heat exchange part 32 are arranged in communication with the external cooling system, so that the cooling liquid can realize the communication of the first heat exchange member 311 and the second heat exchange member 321 through the second heat exchange part, thereby facilitating the unified layout of the heat exchange assembly 30, and further improving the convenience of assembly.

[0190] In addition, the first heat exchange member 311 and the second heat exchange member 321 can be an integral structure or a split structure.

[0191] The second heat exchange part and the first heat exchange member 311 and the second heat exchange member 321 can be an integral structure or a split structure.

[0192] When the second heat exchange part and the first heat exchange member 311 and the second heat exchange member 321 are a split structure, the first heat exchange member 311 and the second heat exchange member 321 are in communication with the second heat exchange part through a pipeline, respectively.

[0193] It should be noted that the processing mode of the first heat exchange member 311 includes but is not limited to casting, 3D printing, extrusion or assembly welding, etc., and the processing mode of the second heat exchange member 321 also includes but is not limited to casting, 3D printing, extrusion or assembly welding, etc.

[0194] The processing mode of the first heat exchange member 311 and the second heat exchange member 321 can be the same or different. Taking the first heat exchange member 311 as an example, the first heat exchange member 311 is processed by assembly welding. Specifically, as shown in Figure 5 and Figure 6 The first heat exchange member 311 includes a first plate body 3113 and a second plate body 3112. The first plate body 3113 is a flat plate member, and the second plate body 3112 has a plurality of grooves formed thereon by stamping or the like. The body between adjacent two grooves of the second plate body 3112 is connected with the first plate body 3113. Each groove and the first plate body 3113 enclose a medium flow channel 3114. The connection position of the first plate body 3113 and the second plate body 3112 is fixed by welding (such as brazing, etc.).

[0195] In some embodiments of the present application, the battery monomer 20 further includes a pressure relief mechanism. The pressure relief mechanism is arranged on the first side wall 21, the avoidance hole 3111 has a projection on the first side wall 21, and the pressure relief mechanism is located in the area where the projection is located, or the pressure relief mechanism is arranged on one of the plurality of side walls, and the pressure relief mechanism and the electrode terminal 22 are arranged on different side walls.

[0196] Specifically, the arrangement of the pressure relief mechanism can improve the safety performance of the battery monomer 20, so as to improve the safety performance of the battery device 100. In addition, by setting the position of the pressure relief mechanism, the application scenarios of the battery device 100 can be increased.

[0197] The arrangement of the pressure relief mechanism can improve the safety performance of the battery monomer 20, so as to improve the safety performance of the battery device 100. In addition, by setting the position of the pressure relief mechanism, the application scenarios of the battery device 100 can be increased.

[0198] In some embodiments of the present application, as shown in Figure 7 or Figure 9 The pressure relief mechanism is arranged on the first side wall 21, and the electrode terminal 22 includes a first electrode terminal 221 and a second electrode terminal 222 arranged at intervals. The first electrode terminal 221 and the second electrode terminal 222 are respectively arranged at opposite sides of the pressure relief mechanism, and the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 50 to 200 mm.

[0199] Specifically, the first heat exchange member 311, the pressure relief mechanism, the first electrode terminal 221 and the second electrode terminal 222 are arranged on the same side of the battery cell 20, and the pressure relief mechanism, the first electrode terminal 221 and the second electrode terminal 222 are arranged in the same direction, the first heat exchange member 311 is arranged at the top of the first side wall 21, and the pressure relief mechanism, the first electrode terminal 221 and the second electrode terminal 222 are arranged in the avoiding hole 3111 of the first heat exchange member 311. The pressure relief mechanism is arranged between the first electrode terminal 221 and the second electrode terminal 222.

[0200] By setting the center distance between the first electrode terminal 221 and the second electrode terminal 222 in the range of 50mm to 200mm, the first side wall 21 can provide more space for the first heat exchange member 311, so as to increase the contact area between the first heat exchange member 311 and the first side wall 21, and further improve the heat exchange efficiency of the first heat exchange member 311 on the battery cell 20.

[0201] It should be noted that the specific value of the center distance between the first electrode terminal 221 and the second electrode terminal 222 can be 50mm, 65mm, 75mm, 85mm, 95mm, 105mm, 115mm, 125mm, 135mm, 145mm, 155mm, 165mm, 175mm, 185mm, 195mm, 200mm.

[0202] In some embodiments of the present application, the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 60mm to 100mm.

[0203] Specifically, the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 60mm to 100mm, by further controlling the distance between the first electrode terminal 221 and the second electrode terminal 222, the space of the first side wall 21 outside the first electrode terminal 221 and the second electrode terminal 222 is larger, so as to increase the contact area between the first heat exchange part 31 and the first side wall 21, and further improve the heat exchange efficiency of the first heat exchange part 31 on the battery cell 20.

[0204] It should be noted that the specific value of the center distance between the first electrode terminal 221 and the second electrode terminal 222 can be 60mm, 70mm, 80mm, 90mm, 100mm.

[0205] In some embodiments of the present application, the pressure relief mechanism is arranged on one of the plurality of side walls, and the pressure relief mechanism and the electrode terminal 22 are arranged on different side walls, the electrode terminal 22 including a first electrode terminal 221 and a second electrode terminal 222 arranged at intervals, and the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 30-200 mm.

[0206] Specifically, the first heat exchange member 311, the pressure relief mechanism, the first electrode terminal 221 and the second electrode terminal 222 are arranged on the same side of the battery monomer 20, and the pressure relief mechanism, the first electrode terminal 221 and the second electrode terminal 222 are arranged in the same direction, the first heat exchange member 311 is arranged at the top of the first side wall 21, and the pressure relief mechanism, the first electrode terminal 221 and the second electrode terminal 222 are arranged in the avoiding hole 3111 of the first heat exchange member 311. The pressure relief mechanism is arranged at intervals between the first electrode terminal 221 and the second electrode terminal 222.

[0207] By setting the center distance between the first electrode terminal 221 and the second electrode terminal 222 in the range of 30-200 mm, without adversely affecting the first electrode terminal 221, the second electrode terminal 222 and the pressure relief mechanism, the first side wall 21 can provide more space for the first heat exchange part 31, thereby increasing the contact area between the first heat exchange part 31 and the first side wall 21, and further improving the heat exchange efficiency of the first heat exchange part 31 on the battery monomer 20.

[0208] It should be noted that the specific value of the center distance between the first electrode terminal 221 and the second electrode terminal 222 can be 30 mm, 35 mm, 45 mm, 55 mm, 65 mm, 75 mm, 85 mm, 95 mm, 105 mm, 115 mm, 125 mm, 135 mm, 145 mm, 155 mm, 165 mm, 175 mm, 185 mm, 195 mm, 200 mm.

[0209] In some embodiments of the present application, the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 40-80 mm.

[0210] Specifically, the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 40-80 mm, by further controlling the distance between the first electrode terminal 221 and the second electrode terminal 222, the space of the first side wall 21 outside the first electrode terminal 221 and the second electrode terminal 222 is larger, to increase the contact area between the first heat exchange part 31 and the first side wall 21, and further improve the heat exchange efficiency of the first heat exchange part 31 on the battery monomer 20.

[0211] It should be noted that the specific values of the first electrode terminal 221 and the second electrode terminal 222 can be 40 mm, 50 mm, 60 mm, 70 mm, 80 mm.

[0212] In some embodiments of the present application, the avoidance hole 3111 has a projection on the first side wall 21, the electrode terminal 22 is located in the area where the projection is located, and the minimum distance between the electrode terminal 22 and the edge of the projection is greater than or equal to 5 mm.

[0213] Specifically, the first heat exchange member 311 is a metal member, and the minimum distance between the electrode terminal 22 and the edge of the projection is set to be greater than or equal to 5 mm, which can enable good insulation performance between the electrode terminal 22 and the first heat exchange member 311 to improve the safety performance of the battery device 100.

[0214] It should be noted that the minimum distance between the electrode terminal 22 and the edge of the projection can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm.

[0215] In some embodiments of the present application, the heat exchange assembly 30 further comprises a heat-conducting adhesive layer 33, and the first heat exchange member 311 is connected to the first side wall 21 of each battery monomer 20 through the heat-conducting adhesive layer 33.

[0216] Specifically, the first heat exchange member 311 is connected to the first side wall 21 of each battery monomer 20 through the heat-conducting adhesive layer 33, which can effectively improve the heat exchange uniformity of the first heat exchange member 311 for each battery monomer 20, thereby effectively improving the heat exchange effect.

[0217] As shown in FIG. 1, Figures 1 to 10 The second aspect of the present application provides a power-using device, which comprises the battery device 100 as above.

[0218] In the battery device 100 of the power-using device, the electrode terminal 22 of the battery monomer 20 occupies space in the box body 10, the first heat exchange part 31 and the electrode terminal 22 of the battery monomer 20 are arranged on the same side, and the first heat exchange part 31 is arranged in the space occupied by the electrode terminal 22, which reduces the case that the first heat exchange part 31 occupies space in the box body 10 alone, thereby enabling the structure in the box body 10 to be more compact and improving the space utilization rate of the box body 10.

[0219] The above description is only a summary of the technical solutions of the present application, in order to enable the technical means of the present application to be more clearly understood, and to be implemented in accordance with the content of the description, and in order to enable the above and other purposes, features and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described.

[0220] In the embodiments of the present application, as shown in FIG. 1,Figures 2 to 10 As shown, the battery device 100 includes a box body 10, a heat exchange assembly 30, and a plurality of battery monomers 20 arranged in an array structure in the box body 10. The battery monomer 20 includes an electrode terminal 22 and a plurality of side walls, including a first side wall 21, and the electrode terminal 22 is arranged on the first side wall 21. All the electrode terminals 22 of the plurality of battery monomers 20 are oriented in the same direction. The heat exchange assembly 30 includes a first heat exchange part 31, which includes a first heat exchange piece 311 located on the same side as the electrode terminal 22 and connected to the first side wall 21. The first heat exchange piece 311 is provided with a plurality of avoiding holes 3111, and the electrode terminal 22 on each battery monomer 20 is arranged in one avoiding hole 3111.

[0221] Specifically, the electrode terminal 22 of the battery monomer 20 occupies space in the box body 10. The first heat exchange part 31 is arranged on the same side as the electrode terminal 22 of the battery monomer 20, and the first heat exchange part 31 is arranged in the space occupied by the electrode terminal 22, thereby reducing the case that the first heat exchange part 31 occupies space in the box body 10 alone, so that the structure in the box body 10 is more compact, and the space utilization rate of the box body 10 is improved.

[0222] Further, along the height direction Z of the box body 10, the inside of the box body 10 includes an inner bottom surface 121 and an inner top surface arranged oppositely. The electrode terminal 22 is arranged towards the inner bottom surface 121, or the electrode terminal 22 is arranged towards the inner top surface. The array structure is a rectangular array structure, which includes a first array direction X and a second array direction Y perpendicular to each other. In the first array direction X, the rectangular array structure includes a plurality of rows, each row including a plurality of battery monomers 20. In the second array direction Y, the rectangular array structure includes a plurality of columns, each column including a plurality of battery monomers 20. One of the first array direction X and the second array direction Y is the length direction of the box body 10, and the other is the width direction of the box body 10.

[0223] Further, the heat exchange assembly 30 further includes a second heat exchange part 32, which includes a plurality of second heat exchange pieces 321. At least one second heat exchange piece 321 is arranged between two adjacent battery monomers 20, and the second heat exchange piece 321 is in thermal connection with the two adjacent battery monomers 20.

[0224] In some examples of the present embodiment, the second heat exchange member 321 is arranged along the first array direction X, and at least part of the battery monomers 20 in each of two columns arranged adjacently are respectively in conductive connection with the second heat exchange member 321. The plurality of side walls further comprises a second side wall 23, the second side wall 23 is arranged intersecting the first side wall 21, and the second side wall 23 is the largest side wall in the plurality of side walls, and the second side wall 23 is in conductive connection with the second heat exchange member 321. In this way, the contact area between the battery monomers 20 and the second heat exchange member 321 can be increased, so that the heat exchange efficiency of the second heat exchange member 321 on the battery monomers 20 is further improved.

[0225] In some examples of the present embodiment, the second heat exchange member 321 is arranged along the second array direction Y, and at least part of the battery monomers 20 in each of two rows arranged adjacently are respectively in conductive connection with the second heat exchange member 321. The plurality of side walls further comprises a second side wall 23 and a third side wall, the second side wall 23 and the third side wall are respectively arranged intersecting the first side wall 21, and the second side wall 23 is the largest side wall in the plurality of side walls, and the third side wall is in conductive connection with the second heat exchange member 321. In this way, expansion space can be provided for the battery monomers 20 during use, thereby improving the safety performance of the battery device 100.

[0226] Further, the first heat exchange member 311 is a first plate-shaped member, the thickness direction of the first plate-shaped member is consistent with the height direction Z of the box body 10, and the second heat exchange member 321 is a second plate-shaped member, and the arrangement direction of the two battery monomers 20 arranged adjacently and in conductive connection with the second heat exchange member 321 is consistent with the thickness direction of the second plate-shaped member.

[0227] Further, the first heat exchange member 311 and the second heat exchange member 321 each comprise a medium flow channel, and the heat exchange assembly 30 further comprises a flow collecting member, the flow collecting member is in communication with the medium flow channel 3114 of the first heat exchange member 311 and the medium flow channel of the second heat exchange member 321 respectively.

[0228] Further, the first heat exchange member 311 comprises a medium flow channel 3114, the medium flow channel 3114 comprises a first flow channel part 3115, the first flow channel part 3115 extends along the second array direction Y, and at least one first flow channel part 3115 is provided corresponding to each row. The medium flow channel 3114 further comprises a second flow channel part 3116, the second flow channel part 3116 extends along the first array direction X, and at least one second flow channel part 3116 is provided corresponding to each battery monomer in each row, and the two ends of the second flow channel part 3116 are respectively in communication with two first flow channel parts 3115 arranged adjacently.

[0229] Further, the battery cell 20 further comprises a pressure relief mechanism; wherein the pressure relief mechanism is arranged on the first side wall 21, the avoiding hole 3111 has a projection on the first side wall 21, and the pressure relief mechanism is located in the area where the projection is located; or the pressure relief mechanism is arranged on one of the plurality of side walls, and the pressure relief mechanism and the electrode terminal 22 are arranged on different side walls.

[0230] In some examples of the present embodiment, the pressure relief mechanism is arranged on the first side wall 21, the electrode terminal 22 comprises a first electrode terminal 221 and a second electrode terminal 222 arranged at intervals, and the first electrode terminal 221 and the second electrode terminal 222 are arranged at intervals on opposite sides of the pressure relief mechanism, respectively, and the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 60-100 mm.

[0231] In some examples of the present embodiment, the pressure relief mechanism is arranged on one of the plurality of side walls, and the pressure relief mechanism and the electrode terminal 22 are arranged on different side walls, the electrode terminal 22 comprises a first electrode terminal 221 and a second electrode terminal 222 arranged at intervals, and the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 40-80 mm.

[0232] Further, the avoiding hole 3111 has a projection on the first side wall 21, and the electrode terminal 22 is located in the area where the projection is located, and the minimum distance between the electrode terminal 22 and the edge of the projection is greater than or equal to 5 mm.

[0233] Further, the heat exchange assembly 30 further comprises a heat-conducting adhesive layer 33, and the first heat exchange member 311 is connected to the first side wall 21 of each battery cell 20 through the heat-conducting adhesive layer 33.

[0234] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body; a plurality of battery monomers arranged in an array structure in the box body, the battery monomers comprising electrode terminals and a plurality of side walls, the plurality of side walls comprising a first side wall, the electrode terminals being arranged on the first side wall, the electrode terminals of all the battery monomers being oriented in the same direction; a heat exchange assembly comprising a first heat exchange part, the first heat exchange part comprising a first heat exchange piece, the first heat exchange piece being located on the same side of the electrode terminals and connected with the first side wall, a plurality of avoiding holes being arranged on the first heat exchange piece, the electrode terminals of each battery monomer being arranged in one avoiding hole.

2. The battery device of claim 1, wherein The inside of the box body comprises an inner bottom surface and an inner top surface arranged oppositely along the height direction of the box body; wherein the electrode terminals are arranged towards the inner bottom surface, or the electrode terminals are arranged towards the inner top surface.

3. The battery device of claim 2, wherein The array structure is a rectangular array structure, the rectangular array structure comprising a first array direction and a second array direction perpendicular to each other, in the first array direction, the rectangular array structure comprises a plurality of rows, each row comprising a plurality of battery monomers, in the second array direction, the rectangular array structure comprises a plurality of columns, each column comprising a plurality of battery monomers, wherein one of the first array direction and the second array direction is the length direction of the box body, and the other is the width direction of the box body.

4. The battery device of claim 3, wherein The heat exchange assembly further comprises a second heat exchange part, the second heat exchange part comprising a plurality of second heat exchange pieces, at least one second heat exchange piece being arranged between two adjacent battery monomers, the second heat exchange piece being in thermal connection with the two adjacent battery monomers.

5. The battery device of claim 4, wherein The second heat exchange pieces are arranged along the first array direction, at least some battery monomers in two adjacent columns are respectively in thermal connection with the second heat exchange pieces.

6. The battery device of claim 5, wherein The plurality of side walls further comprise a second side wall, the second side wall being arranged intersecting with the first side wall, among the plurality of side walls, the second side wall is the side wall with the largest area, the second side wall being in thermal connection with the second heat exchange pieces.

7. The battery device of claim 4, wherein The second heat exchange pieces are arranged along the second array direction, at least some battery monomers in two adjacent rows are respectively in thermal connection with the second heat exchange pieces.

8. The battery device of claim 7, wherein The plurality of side walls further comprise a second side wall and a third side wall, the second side wall and the third side wall being arranged intersecting with the first side wall respectively, among the plurality of side walls, the second side wall is the side wall with the largest area, the third side wall being in thermal connection with the second heat exchange pieces.

9. The battery device of claim 4, wherein The first heat exchange piece is a first plate-shaped piece, the thickness direction of the first plate-shaped piece being consistent with the height direction of the box body; and / or, the second heat exchange piece is a second plate-shaped piece, the arrangement direction of the two adjacent battery monomers in thermal connection with the second heat exchange piece being consistent with the thickness direction of the second plate-shaped piece.

10. The battery device of claim 4, wherein At least one of the first heat exchange piece and the second heat exchange piece comprises a medium flow channel for accommodating a heat exchange medium.

11. The battery device of claim 10, wherein, The first heat exchange member comprises the medium flow channel, and the medium flow channel comprises a first flow channel part extending along the second array direction, and each row is provided with at least one first flow channel part.

12. The battery device of claim 11, wherein, The medium flow channel further comprises a second flow channel part extending along the first array direction, and each battery monomer in each row is provided with at least one second flow channel part, and two ends of the second flow channel part are respectively communicated with two first flow channel parts arranged adjacently.

13. The battery device of claim 10, wherein, The first heat exchange member and the second heat exchange member both comprise medium flow channels, and the heat exchange assembly further comprises a flow collecting member which is respectively communicated with the medium flow channel of the first heat exchange member and the medium flow channel of the second heat exchange member.

14. The battery device of any one of claims 1 to 13, wherein The battery monomer further comprises a pressure relief mechanism. The pressure relief mechanism is arranged on the first side wall, the avoiding hole has a projection on the first side wall, and the pressure relief mechanism is located in the area where the projection is located; or the pressure relief mechanism is arranged on one of the plurality of side walls, and the pressure relief mechanism and the electrode terminal are arranged on different side walls.

15. The battery device of claim 14, wherein, The pressure relief mechanism is arranged on the first side wall, the electrode terminal comprises a first electrode terminal and a second electrode terminal arranged at intervals, the first electrode terminal and the second electrode terminal are arranged at intervals on opposite sides of the pressure relief mechanism respectively, and the center distance between the first electrode terminal and the second electrode terminal is in the range of 50 mm to 200 mm.

16. The battery device of claim 15, wherein, The center distance between the first electrode terminal and the second electrode terminal is in the range of 60 mm to 100 mm.

17. The battery device of claim 14, wherein, The pressure relief mechanism is arranged on one of the plurality of side walls, and the pressure relief mechanism and the electrode terminal are arranged on different side walls, the electrode terminal comprises a first electrode terminal and a second electrode terminal arranged at intervals, and the center distance between the first electrode terminal and the second electrode terminal is in the range of 30 mm to 200 mm.

18. The battery device of claim 17, wherein, The center distance between the first electrode terminal and the second electrode terminal is in the range of 40 mm to 80 mm.

19. The battery device of any one of claims 1 to 13, wherein The avoiding hole has a projection on the first side wall, the electrode terminal is located in the area where the projection is located, and the minimum distance between the electrode terminal and the edge of the projection is greater than or equal to 5 mm.

20. The battery device of any one of claims 1 to 13, wherein, The heat exchange assembly further comprises a heat-conducting adhesive layer, and the first heat exchange member is connected with the first side wall of each battery monomer through the heat-conducting adhesive layer.

21. An electrical device, comprising: The power consumption equipment comprises the battery device according to any one of claims 1 to 19.

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