CN223693256U

CN223693256U - Battery devices and electrical equipment

Info

Publication number: CN223693256U
Application number: CN202422801971.8U
Authority: CN
Inventors: 覃论; 杨辉; 王勇; 贾俊
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-11-15
Filing date: 2024-11-15
Publication date: 2025-12-19
Anticipated expiration: 2034-11-15

Abstract

The application 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 battery monomers are arranged in the box body in an array structure, the battery monomers comprise electrode terminals and a plurality of side walls, the side walls comprise first side walls, the electrode terminals are arranged on the first side walls, all the electrode terminals of the battery monomers face the same direction, the heat exchange assembly comprises a first heat exchange part, the first heat exchange part and the electrode terminals are positioned on the same side and are connected with the first side walls, a plurality of avoidance holes are formed in the first heat exchange part, and the electrode terminals on each battery monomer are arranged in one avoidance hole. The first heat exchange part and the electrode terminal of the battery cell are arranged on the same side and occupy the space occupied by the electrode terminal, so that the condition that the first heat exchange part occupies the space of the box body independently is reduced, and the space utilization rate of the box body is improved.

Description

Battery device and electric equipment

Technical Field

The application relates to the technical field of energy storage, in particular to a battery device and electric equipment.

Background

With the development of new energy, more and more fields adopt new energy as power. The battery device is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like due to the advantages of high energy density, recycling charge, safety, environmental protection and the like.

In the related art, the battery device comprises a box body, a heat exchange piece with a flow channel and a plurality of battery monomers, wherein the battery monomers and the heat exchange piece are respectively arranged in the box body, and the heat exchange piece occupies space in the height direction of the box body, so that the space utilization rate of the box body in the height direction is low.

Disclosure of utility model

In view of the above problems, the application provides a battery device and electric equipment, which solve the problem of low utilization rate of box space.

A first aspect of the present application proposes a battery device including:

a case;

The battery cells are arranged in the box body in an array structure, each battery cell comprises an electrode terminal and a plurality of side walls, each side wall comprises a first side wall, the electrode terminals are arranged on the first side wall, and all the electrode terminals of the battery cells face the same direction;

The heat exchange assembly comprises a first heat exchange part, the first heat exchange part and the electrode terminals are located on the same side and are connected with the first side wall, a plurality of avoidance holes are formed in the first heat exchange part, and the electrode terminals on each battery cell are arranged in one avoidance hole.

Specifically, the battery single electrode terminal occupies space in the box body, the first heat exchange part and the battery single electrode terminal are arranged on the same side, the first heat exchange part is arranged in the space occupied by the electrode terminal, the condition that the first heat exchange part occupies the space of the box body independently is reduced, the structure in the box body is more compact, and the space utilization rate of the box body is improved.

In some embodiments of the application, the interior of the case includes oppositely disposed inner bottom and top surfaces along the height of the case;

wherein the electrode terminal is disposed toward the inner bottom surface, or the electrode terminal is disposed toward the inner top surface.

The battery device is arranged in such a way that the use requirements of different application scenes are met by adjusting the direction of the electrode terminals of the battery cells, so that the application range of the battery device is enlarged.

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 the first array direction, the rectangular array structure includes a plurality of rows, each row includes a plurality of battery cells, and the second array direction 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 a length direction of the case, and the other is a width direction of the case. The arrangement is convenient for the layout of a plurality of battery monomers in the box body, and simultaneously improves the convenience of the assembly of the battery monomers, so that the space utilization rate in the box body is maximized.

In some embodiments of the present application, the heat exchange assembly further includes a second heat exchange portion, where the second heat exchange portion includes a plurality of second heat exchange members, and one second heat exchange member is disposed between at least some of the two adjacent battery cells, and the second heat exchange member is in heat conductive connection with the two adjacent battery cells.

By the arrangement, the effective heat exchange of the battery monomers in the rectangular array structure can be further improved, and the heat exchange effect is further improved.

In some embodiments of the present application, the second heat exchange member is disposed along the first array direction, and at least a portion of the battery cells in two adjacent columns are respectively in heat conductive connection with the second heat exchange member. So set up, utilize the second heat transfer piece to carry out the heat transfer to the battery monomer in the adjacent two rows, utilize a part to realize the heat transfer to a plurality of battery monomer promptly to can simplify the structure of heat exchange assembly, reduce and occupy the space in the box, make the space utilization in the box obtain promoting, also reduced the cost of manufacturing simultaneously.

In some embodiments of the present application, the plurality of side walls further includes a second side wall intersecting the first side wall, and the second side wall is the largest-area side wall among the plurality of side walls, and is thermally connected to the second heat exchange member. The arrangement can increase the contact area between the battery monomer and the second heat exchange piece, so that the heat exchange efficiency of the second heat exchange piece to the battery monomer is further improved.

In some embodiments of the present application, the second heat exchange member is disposed along the second array direction, and at least a part of the battery cells in two adjacent rows are respectively in heat conductive connection with the second heat exchange member. So set up, utilize the second heat transfer piece to carry out the heat transfer to the battery monomer in two adjacent rows, utilize a part to realize the heat transfer to a plurality of battery monomer promptly to can simplify the structure of heat exchange assembly, reduce and occupy the space in the box, make the space utilization in the box obtain promoting, also reduced the cost of manufacturing simultaneously.

In some embodiments of the present application, the plurality of side walls further includes a second side wall and a third side wall, the second side wall and the third side wall are respectively disposed to intersect the first side wall, and among the plurality of side walls, the second side wall is a side wall with the largest area, and the third side wall is in heat conduction connection with the second heat exchange member. By the arrangement, an expansion space can be provided for the use process of the battery monomer, so that the safety performance of the battery device is improved.

In some embodiments of the application, the first heat exchange member is a first plate-like member, and a thickness direction of the first plate-like member coincides with a height direction of the case;

and/or the second heat exchange piece is a second plate-shaped piece, and the arrangement direction of two adjacent battery monomers connected with the second heat exchange piece in a heat conduction way is consistent with the thickness direction of the second plate-shaped piece.

So set up, can further reduce and occupy the inner space of box for space utilization in the box can be promoted.

In some embodiments of the application, at least one of the first heat exchange member and the second heat exchange member comprises a media flow path for receiving a heat exchange medium.

So set up, can improve the heat exchange efficiency to battery monomer for the heat transfer effect has obtained effectively promoting.

In some embodiments of the application, the first heat exchange member and the second heat exchange member each comprise a media flow passage, and the heat exchange assembly further comprises a current collector in communication with the media flow passages of the first heat exchange member and the second heat exchange member, respectively. The device is arranged in such a way, the communication setting of the first heat exchange piece and the second heat exchange piece can be realized by utilizing the current collector, so that the unified layout of the heat exchange assembly is facilitated, and the convenience of assembly can be improved.

In some embodiments of the application, the first heat exchange member comprises a medium flow channel comprising first flow channel portions extending in the direction of the second array, each row being provided with at least one first flow channel portion.

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

In some embodiments of the present application, the medium flow channel further includes a second flow channel portion, the second flow channel portion extends along the first array direction, at least one second flow channel portion is provided for each battery cell in each row, and two ends of the second flow channel portion are respectively connected to two first flow channel portions that are adjacently disposed. By the arrangement, the contact area with the battery monomer can be further increased, and the heat exchange effect on the battery monomer is further improved.

In some embodiments of the application, the battery cell further comprises a pressure relief mechanism;

The pressure relief mechanism is arranged on the first side wall, the avoidance hole is provided with a projection on the first side wall, the pressure relief mechanism is positioned in an area where the projection is positioned, or the pressure relief mechanism is arranged on one side wall of the plurality of side walls, and the pressure relief mechanism and the electrode terminal are arranged on different side walls.

The pressure release mechanism is arranged to improve the safety performance of the battery unit, so that the safety performance of the battery device is improved, and in addition, the application scene of the battery device can be increased by arranging the pressure release mechanism.

In some embodiments of the present application, the pressure relief mechanism is disposed on the first side wall, and the electrode terminals include first and second electrode terminals disposed at intervals, the first and second electrode terminals being disposed at opposite sides of the pressure relief mechanism, respectively, with a center-to-center distance between the first and second electrode terminals in a range of 50 mm to 200 mm.

So set up, can make first lateral wall provide bigger space for first heat transfer part to can increase the area of contact of first heat transfer part and first lateral wall, and then improve first heat transfer part to the free heat exchange efficiency of battery.

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

So set up, through further control distance between first electrode terminal and the second electrode terminal, can the first side wall be located the space outside first electrode terminal and the second electrode terminal bigger to increase the area of contact of first heat transfer part and first side wall, and then improve first heat transfer part to the free heat exchange efficiency of battery.

In some embodiments of the application, the pressure relief mechanism is disposed on one of the plurality of side walls, and the pressure relief mechanism is disposed on a different side wall than the electrode terminals, the electrode terminals including first and second electrode terminals disposed at intervals, a center-to-center distance between the first and second electrode terminals being in a range of 30 to 200 millimeters.

So set up, under the prerequisite that does not produce adverse effect to first electrode terminal, second electrode terminal and relief mechanism, can make first lateral wall provide bigger space for first heat transfer part to can increase the area of contact of first heat transfer part and first lateral wall, and then improve first heat transfer part to the free heat exchange efficiency of battery.

In some embodiments of the present application, the center-to-center distance between the first electrode terminal and the second electrode terminal is in the range of 40 mm to 80 mm. So set up, through further control distance between first electrode terminal and the second electrode terminal, can the first side wall be located the space outside first electrode terminal and the second electrode terminal bigger to increase the area of contact of first heat transfer part and first side wall, and then improve first heat transfer part to the free heat exchange efficiency of battery.

In some embodiments of the application, the relief hole has a projection on the first sidewall, the electrode terminal is located in an area where the projection is located, and a minimum distance of the electrode terminal from an edge of the projection is 5 millimeters or more.

The hole can be dodged effectively to dodge to the relief mechanism to the setting so that the relief mechanism can open smoothly and carry out the pressure release operation.

In some embodiments of the application, the heat exchange assembly further comprises a heat conductive glue layer, and the first heat exchange member is connected to the first side wall of each battery cell through the heat conductive glue layer.

So set up, can effectively improve first heat transfer piece to each battery monomer's heat transfer homogeneity to the effect of heat transfer has effectively been improved.

A second aspect of the application proposes an electrical consumer comprising a battery device as described above.

In the battery device of the electric equipment, the electrode terminal of the battery occupies space in the box body, the first heat exchange part and the electrode terminal of the battery are arranged on the same side, the first heat exchange part is arranged in the space occupied by the electrode terminal, the condition that the first heat exchange part occupies the space of the box body independently is reduced, and therefore the structure in the box body is more compact, and the space utilization rate of the box body is improved.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Fig. 1 schematically shows a schematic structural view of a vehicle according to an embodiment of the present application;

Fig. 2 schematically illustrates a structural schematic view of a battery device according to an embodiment of the present application;

fig. 3 schematically illustrates a partial structure diagram of a battery device according to an embodiment of the present application;

fig. 4 is an exploded structural view of the battery device shown in fig. 3;

FIG. 5 is a schematic view of the heat exchange assembly of FIG. 4;

FIG. 6 is a cross-sectional view of A-A of the heat exchange assembly shown in FIG. 4;

Fig. 7 schematically shows a partial structure diagram of a battery device according to an embodiment of the present application;

FIG. 8 is a schematic view of the heat exchange assembly shown in FIG. 7;

Fig. 9 schematically shows a partial structure diagram of a battery device according to an embodiment of the present application;

fig. 10 is a schematic view of the heat exchange assembly shown in fig. 9.

The reference numerals are as follows:

1000. A vehicle;

100. 200 parts of battery device, 300 parts of controller and motor;

10. A case;

11. A first case;

12. 121, the inner bottom surface;

20. a battery cell;

21. First side wall 22, electrode terminal 221, first electrode terminal 222, second electrode terminal 23, second side wall;

30. a heat exchange assembly;

31. 311, first heat exchange pieces, 3111, avoiding holes, 3112, second plate body, 3113, first plate body, 3114, medium flow channel, 3115, first flow channel portion, 3116, second flow channel portion, 32, second heat exchange portions, 321, second heat exchange pieces, 33, heat conducting glue layer;

x, the first array direction, Y, the second array direction, Z, the height direction.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, 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 terms used herein are for the purpose of describing particular embodiments only and are not intended to be limiting of the application, and the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the above description of the drawings are intended to cover non-exclusive inclusions.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B, and may indicate that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In describing embodiments of the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the battery device is more widely used in view of the development of market situation. The battery device is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of battery devices, the market demand of the battery devices is also continuously expanding.

In order to solve the problems, in the application, a battery device comprises a box body, a plurality of battery monomers and a heat exchange assembly, wherein the battery monomers are arranged in the box body in an array structure, the battery monomers comprise electrode terminals and a plurality of side walls, the side walls comprise first side walls, the electrode terminals are arranged on the first side walls, all the electrode terminals of the battery monomers face the same direction, the heat exchange assembly comprises a first heat exchange part, the first heat exchange part and the electrode terminals are positioned on the same side and are connected with the first side walls, a plurality of avoidance holes are formed in the first heat exchange part, and the electrode terminals on each battery monomer are arranged in one avoidance hole. The battery cell electrode terminal occupies space in the box body, the first heat exchange part and the battery cell electrode terminal are arranged on the same side, the first heat exchange part is arranged in the space occupied by the electrode terminal, the condition that the first heat exchange part occupies the space of the box body independently is reduced, the structure in the box body is more compact, and the space utilization rate of the box body is improved.

The technical solutions described in the embodiments of the present application are not limited to the above-described devices, but may be applied to all devices using battery devices, but for simplicity of description, the following embodiments are described by taking electric vehicles as examples.

For example, as shown in fig. 1, a schematic structural diagram of a vehicle 1000 according to an embodiment of the present application is shown, the vehicle 1000 may be a fuel-oil vehicle, a gas-fired vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. The motor 300, the controller 200, and the battery device 100 may be provided in the interior of the vehicle, and the controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be provided at the bottom or the head or the tail of the vehicle. The battery device 100 may be used for power supply of a vehicle, for example, the battery device 100 may be used as an operating power source of the vehicle, for circuitry of the vehicle, for example, for starting, navigation, and operational power requirements of the vehicle when running. In another embodiment of the present application, the battery device 100 may be used not only as an operating power source of a vehicle, but also as a driving power source of the vehicle, instead of or in part instead of fuel oil or natural gas, to supply driving power to the vehicle.

The battery device (Battery Apparatus) as referred to in embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include a plurality of battery cells connected in series, parallel, or series-parallel by a bus bar.

In some embodiments, the battery cell assembly (Battery Cell Assembly) is generally formed from an arrangement of a plurality of battery cells.

As an example, the Battery cell assembly may be a Battery Module (Battery Module) formed by arranging and fixing a plurality of Battery cells to form an independent Module. As an example, the battery module may be formed by binding a plurality of battery cells by a tie.

In some embodiments, the battery device may be a battery Pack (battery Pack) that includes a case and one or more battery cell assemblies housed in the case.

As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the case in such a manner that the battery module is fixed in the case.

As an example, the battery cell assembly may be accommodated in the case by directly fixing a plurality of battery cells to the case.

As an example, the case may include a first case and a second case. The first box body and the second box body are buckled, so that a closed space is formed inside the box body to accommodate the battery cell assembly. The closing means covering or closing, and can be sealing or unsealing. The first housing may be a top cover or a bottom plate.

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

In some embodiments, the tank may be part of the chassis structure of the vehicle. For example, a portion of the tank may become at least a portion of the floor of the vehicle, or a portion of the tank may become at least a portion of the cross member and the side member of the vehicle.

The technical scheme described in the embodiment of the application is applicable to various electric devices using battery monomers, such as mobile phones, portable equipment, notebook computers, battery cars, electric toys, electric tools, vehicles, ships, spacecraft and the like, and for example, the spacecraft comprises planes, rockets, spaceships, spacecraft and the like.

In some embodiments of the present application, the battery cell may be a secondary battery, where the secondary battery refers to a battery cell that can be used continuously by activating the active material by charging after the battery cell is discharged.

The battery cell may be a lithium 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 storage battery, etc., which is not limited by the embodiment of the application.

In some embodiments of the present application, a battery cell includes a case including a plurality of sidewalls including a first sidewall on which the pressure relief mechanism is provided, the pressure relief mechanism configured to be opened or closed according to whether an internal pressure of the case reaches a pressure threshold, an electrode assembly disposed inside the case, and an insulator disposed inside the case and between the case and the electrode assembly for insulating the case and the electrode assembly, the insulator abutting against the electrode assembly.

As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shaped battery cell, and the prismatic battery cell includes a square-case battery cell, a blade-shaped battery cell, a polygonal-prismatic battery cell, such as a hexagonal-prismatic battery cell, etc., and the present application is not particularly limited.

The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

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

As an example, the positive electrode current collector has two surfaces opposing in its own thickness direction, and the positive electrode active material is provided on either or both of the two surfaces opposing the positive electrode current collector.

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

As an example, the positive electrode active material may include at least one of lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. 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 may be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of the lithium-containing phosphate may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO ₄ (which may also be referred to simply as LFP)), a composite of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO ₄), a composite of lithium manganese phosphate and carbon, lithium manganese phosphate, and a composite of lithium manganese phosphate and carbon. Examples of the lithium transition metal oxide may include, but are not limited to, at least one of lithium cobalt oxide (e.g., liCoO ₂), lithium nickel oxide (e.g., liNiO ₂), lithium manganese oxide (e.g., liMnO ₂、LiMn₂O₄), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide (e.g., liNi _1/3Co_1/3Mn_1/3O₂ (may also be abbreviated as NCM ₃₃₃）、LiNi_0.5Co_0.2Mn_0.3O₂ (may also be abbreviated as NCM ₅₂₃）、LiNi_0.5Co_0.25Mn_0.25O₂) (may also be abbreviated as NCM ₂₁₁）、LiNi_0.6Co_0.2Mn_0.2O₂ (may also be abbreviated as NCM ₆₂₂）、LiNi_0.8Co_0.1Mn_0.1O₂ (may also be abbreviated as NCM ₈₁₁)), lithium nickel cobalt aluminum oxide (e.g., liNi _0.8Co_0.15Al_0.05O₂), and modified compounds thereof, etc.

In some embodiments, the positive electrode may be a metal foam. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, foam carbon or the like. When the metal foam is used as the positive electrode, the surface of the metal foam may not be provided with the positive electrode active material, but may be provided with the positive electrode active material. As an example, the positive electrode active material is filled or/and deposited within the metal foam.

In some embodiments, the negative electrode may be a negative electrode tab, which may include a negative electrode current collector.

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

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

As an example, the anode current collector has two surfaces opposing in its own thickness direction, and the anode active material is provided on either or both of the two surfaces opposing the anode current collector.

As an example, a negative active material for a battery cell, which is well known in the art, may be used. As an example, the anode active material may include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material, lithium titanate, and the like. The silicon-based material may be at least one selected from elemental silicon, silicon oxygen compounds, silicon carbon composites, silicon nitrogen composites, and silicon alloys. The tin-based material may be at least one selected from elemental tin, tin oxide, and tin alloys. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery cell negative electrode active material may be used. These negative electrode active materials may be used alone or in combination of two or more.

In some embodiments, the negative electrode may employ a metal foam. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, foam carbon or the like. When the foam metal is used as the negative electrode sheet, the surface of the foam metal does not need to be provided with a negative electrode active material, and the surface of the foam metal can be provided with the negative electrode active material.

As an example, a negative electrode active material may be filled or/and deposited within the negative electrode current collector.

In some embodiments, the material of the positive electrode current collector may be aluminum and the material of the negative electrode current collector may be copper.

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

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

As an example, the main material of the separator may be at least one selected from glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator may be a single-layer film or a multilayer composite film, and is not particularly limited. When the separator is a multilayer composite film, the materials of the respective layers may be the same or different, and are not particularly limited. The separator may be a single member located between the positive and negative electrodes, or may be attached to the surfaces of the positive and negative electrodes. The surface of the isolating film may be coated with inorganic particle coating, organic particle coating or organic/inorganic composite coating.

In some embodiments, the separator is a solid state electrolyte. The solid electrolyte is arranged between the anode and the cathode and plays roles in transmitting ions and isolating the anode and the cathode.

The electrode assembly can be a winding structure, a lamination structure or a mixed structure of winding and lamination.

In some embodiments, the electrode assembly is a rolled structure. The positive plate and the negative plate are wound into a winding structure.

In some embodiments, the electrode assembly is a lamination stack.

As an example, a plurality of positive electrode sheets and negative electrode sheets may be provided, respectively, and a plurality of positive electrode sheets and a plurality of negative electrode sheets may be alternately stacked.

As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheets are folded to form a plurality of folded sections arranged in a stacked manner, with one positive electrode sheet sandwiched between adjacent folded sections.

As an example, the positive and negative electrode sheets are each folded to form a plurality of folded sections in a stacked arrangement.

As an example, the separator may be provided in plurality, respectively between any adjacent positive electrode sheet or negative electrode sheet.

As an example, the separator may be continuously provided, being disposed between any adjacent positive or negative electrode sheets by folding or winding.

In some embodiments, the electrode assembly may have a cylindrical shape, a flat shape, a polygonal column shape, or the like.

In some embodiments, the pole pieces of the electrode assembly are provided with tabs that can conduct current away from the electrode assembly. The tab includes a positive tab and a negative tab.

In some embodiments, a pressure relief mechanism is provided on the housing. The pressure release mechanism is used for exhausting the internal gas of the battery cell.

As an example, the internal pressure or temperature of the battery cell is actuated to release the internal pressure or temperature when the internal pressure or temperature reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches a preset threshold value, the pressure release mechanism performs an action or a weak structure arranged in the pressure release mechanism is destroyed, so that an opening or a channel for releasing the internal pressure or temperature is formed. The threshold design varies according to design requirements. The threshold may 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.

As an example, the pressure relief mechanism may be integrally formed with the housing.

As an example, the pressure relief mechanism may also be provided separately from and connected to the housing.

The term "actuated" as used herein refers to the pressure relief mechanism being actuated or activated to a state such that the internal pressure and temperature of the battery cells are relieved. The action by the pressure relief mechanism may include, but is not limited to, movement of a component in the pressure relief mechanism to form a vent passage, at least a portion of the pressure relief mechanism breaking, being torn or opened, etc. When the pressure release mechanism is actuated, high-temperature and high-pressure substances inside the battery cell are discharged outwards from the actuated position as emissions. In this way, the pressure and temperature of the battery cell can be relieved under the condition of controllable pressure or temperature, thereby reducing the occurrence of potential serious accidents.

In some embodiments, when the housing is in a non-sealing structure, the pressure release mechanism may be provided as a through hole for exhausting gas inside the battery cell.

References to emissions from the battery cell in the present application include, but are not limited to, electrolytes, dissolved or split positive and negative electrode sheets, fragments of separators, high temperature and pressure gases generated by the reaction, flames, and the like.

The positive electrode tab and the negative electrode tab can be led out from the same end of the pole piece, and can also be led out from the opposite ends of the pole piece respectively.

The structures of the positive electrode tab and the negative electrode tab may be the same or different. Taking the positive electrode tab as an example, the positive electrode tab may include a plurality of positive electrode tab layers, and the plurality of positive electrode tab layers are stacked together to form the positive electrode tab. The positive electrode tab may include at least two portions, one portion being located between the main body portion of the pole piece and the insulating member and the other portion being located between the insulating member and the electrode lead-out member.

The insulating piece can insulate at least part of the tab from the end face of the main body part, so that when the battery cell is affected by external impact, vibration and the like, the risk of inserting the tab into the main body part is reduced, the risk of short circuit of the battery cell can be reduced, and the reliability of the battery cell is improved.

The insulating member may be of an integral structure or a split structure. As an example, the insulator is formed from a plurality of separately formed pieces that are joined together. As another example, the insulator is integrally formed by stamping.

For example, the insulating part is a plastic part, the insulating part is integrally formed in an injection molding mode, the plastic part is convenient to process, and the manufacturing cost of the plastic part is low.

In some embodiments of the application, the housing includes a shell having an opening and an end cap coupled to the shell and closing the opening, the end cap forming a first sidewall, and the pressure relief mechanism being disposed on the end cap.

In some embodiments of the present application, the housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper aluminum composite housing), an aluminum plastic film, or the like. In some embodiments, the housing may be a sealed structure or a non-sealed structure. As an example, when the case is of a non-sealing structure, the case plays a role in protecting the electrode assembly, and a sealing pouch for sealing the electrode assembly and the electrolyte is further included between the case and the electrode assembly. In particular, the sealed bag may be a bag-like insulating member or an aluminum plastic film. When the casing is of a sealing structure, the casing is used for packaging the electrode assembly, electrolyte and other components. The housing may be provided with one or more openings. One or more end caps may also be provided.

In addition, the connection between the end cap and the housing may include, but is not limited to, clamping, bonding, welding, or connecting via a connector.

In some embodiments of the application, the battery cell further includes an electrode terminal disposed on the end cap and electrically connected to the electrode assembly. The electrode terminals are electrically connected with the tabs of the electrode assembly. The electrode terminal may be directly connected to the tab, or may be indirectly connected to the tab through the current collecting member. The electrode terminal may be provided on the terminal cover or may be provided on the case. In the embodiment shown in the present application, the electrode terminals are disposed on the end caps.

As shown in fig. 2 to 10, in some embodiments of the present application, a battery device is provided, which includes a case 10, a plurality of battery cells 20 and a heat exchanging assembly 30, the plurality of battery cells 20 are disposed in the case 10 in an array structure, the battery cells 20 include a plurality of side walls and electrode terminals 22, the plurality of side walls include a first side wall 21, the electrode terminals 22 are disposed on the first side wall 21, all of the electrode terminals 22 of the plurality of battery cells 20 are oriented identically, the heat exchanging assembly 30 includes a first heat exchanging part 31, the first heat exchanging part 31 includes a first heat exchanging member 311, the first heat exchanging member 311 is disposed on the same side as the electrode terminals 22 and is connected to the first side wall 21, a plurality of escape holes 3111 are provided on the first heat exchanging member 311, and the electrode terminals 22 on each battery cell 20 are disposed in one of the escape holes 3111. The heat exchange assembly 30 includes a first heat exchange portion 31, where the first heat exchange portion 31 is located on the same side as the electrode terminal 22 and is connected to the first side wall 21, and the first heat exchange portion 31 is disposed at an interval from the electrode terminal 22 and is capable of exchanging heat with the battery cell 20, and on the same battery cell 20, the first heat exchange portion 31 is disposed farther from the center position p of the first side wall 21 than the electrode terminal 22.

In the present embodiment, the case 10 may include a first case 11 and a second case 12. The first casing 11 and the second casing 12 are fastened together, so that a closed space is formed inside the casing 10 to receive the battery cells 20. The second case 12 is provided with a receiving groove with an opening, the plurality of battery cells 20 and the heat exchange assembly 30 are respectively disposed in the receiving groove, the first case 11 is of a cover plate structure (may be a flat plate or a pressed structure), and the first case 11 is connected with the second case 12 (the connection mode includes but is not limited to bonding, welding or connecting via a connecting piece, etc.) and seals the opening of the receiving groove.

As shown in fig. 2, a rectangular structure is taken as an example of the case 10, where the arrangement manner of the first case 11 and the second case 12 is the height direction Z of the case 10, the first case 11 and the second case 12 are both rectangular structures, the length direction of the second case 12 is the length direction of the case 10, and the height direction Z of the second case 12 is the width direction of the case 10.

The battery cell 20 includes a plurality of side walls, the first side wall 21 is one of the plurality of side walls, and in the height direction Z of the case 10, the first side wall 21 is disposed facing the first case 11 or the first side wall 21 is disposed facing the second case 12, where the first side wall 21 is a structure disposed on a housing of the battery cell 20, and may also be an end cover of the housing.

The electrode terminals 22 are convexly disposed on the first sidewall 21, and the electrode terminals 22 are disposed to extend along the height direction Z of the case 10, and the electrode terminals 22 of the battery cells 20 occupy a space in the height direction Z of the case 10 within the case 10 to satisfy the installation requirements of the battery cells 20.

In the application, the first heat exchange part 31 and the electrode terminal 22 of the battery cell 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, so that the condition that the first heat exchange part 31 occupies the space of the box body 10 independently is reduced, the structure in the box body 10 is more compact, and the space utilization rate of the box body 10 is improved.

It should be understood that, in the present application, the first heat exchanging portion 31 is capable of exchanging heat to the battery cell 20 through the first side wall 21, wherein the heat exchanging manner may be used for cooling only the battery cell 20, heating only the battery cell 20, or heating and cooling both the battery cell 20.

In the present application, a plurality of battery cells 20 are disposed in the case 10 and in an array structure, and in the array structure, a portion of the battery cells 20 may constitute one battery cell assembly to form a plurality of battery cell assemblies, or all of the battery cells 20 may constitute one battery cell assembly.

Note that, the electrode terminal 22 is disposed in the escape hole 3111 of the first heat exchange member 311, and the electrode terminal 22 and the wall of the escape hole 3111 may be bonded to each other or may be disposed at intervals.

The first heat exchanging element 311 may be a metal element (such as a ferrous element, a copper element, an aluminum element, or a stainless steel element), or may be a non-metal element (such as a graphite element having heat conducting property).

In the application, the first heat exchanging member 311 is a metal member, the electrode terminal 22 is a charged member, the electrode terminal 22 is arranged in the avoidance hole at intervals from the hole wall of the avoidance hole 3111, and the interval distance meets the insulation requirement. In addition, an insulating structure (for example, an insulating paste or an insulating material) may be provided between the electrode terminal 22 and the wall of the relief hole 3111 to improve the insulating effect.

It should be noted that the first heat exchange member 311 is connected to the first side wall 21 of the battery cell 20, and the first heat exchange member 311 and the first side wall 21 may be directly connected to each other or indirectly connected to each other, and the battery cell 20 may transfer heat between the first side wall 21 and the first heat exchange member 311, so that the temperature of the battery cell 20 is adjusted by using the first heat exchange member 311, so that the battery can be located in a temperature range where the battery can operate optimally.

The plurality of battery cells 20 disposed within the case 10 are disposed in an array structure including, but not limited to, a rectangular array structure, a circular array structure, or other forms of array structures.

In addition, the first heat exchanging member 311 is a first distance from the first side wall 21, and the distance between the electrode terminal 22 and the first side wall 21 is a second distance, where a difference between the first distance and the second distance is zero or greater and 10 mm or less (for example, 0 mm, 1mm, 2 mm, 3 mm, 4 mm, 5mm, 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm) is set, so that the space occupied in the height direction Z of the case 10 can be reduced on the basis that the first heat exchanging portion has sufficient heat exchanging capability.

In some embodiments of the present application, the interior of the case 10 includes an inner bottom surface 121 (shown in fig. 2 to 4) and an inner top surface (not shown) disposed opposite to each other in the height direction Z of the case 10. Wherein the electrode terminal 22 is disposed toward the inner bottom surface 121, or the electrode terminal 22 is disposed toward the inner top surface.

Specifically, the case 10 is formed by buckling the first case 11 and the second case 12, and the arrangement direction of the first case 11 and the second case 12 is the thickness direction of the case 10. Wherein the first case 11 is disposed above the second case 12, the inner top surface is formed at a side of the first case 11 facing the second case 12, and the inner bottom surface 121 is formed at a side of the second case 12 facing the first case 11.

The electrode terminals 22 of all the battery cells 20 are located at the same side, and the electrode terminals 22 may be disposed all facing the inner top surface or all facing the inner bottom surface 121. By means of the arrangement, the use requirements of different application scenes are met by adjusting the orientation of the electrode terminals 22 of the battery cells 20, and therefore the application range of the battery device is enlarged.

In some embodiments of the present application, as shown in fig. 2 to 4, and fig. 7 and 9, the array structure is a rectangular array structure including 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 including a plurality of battery cells 20 therein, and in the second array direction Y, the rectangular array structure includes a plurality of columns each including a plurality of battery cells 20 therein, wherein one of the first array direction X and the second array direction Y is a length direction of the case 10, and the other is a width direction of the case 10.

Specifically, in the present application, the case 10 has a rectangular structure, the plurality of battery cells 20 are disposed inside the case 10 and form an array structure, and by disposing the array structure as a rectangular array structure, the array structure formed by the plurality of battery cells 20 is more adapted to the structure of the case 10, so that the space of the case 10 can be fully utilized, the space utilization in the case 10 can be maximized, and the space utilization of the case 10 can be improved.

In addition, through setting up array structure into rectangular array structure, the overall arrangement and the installation of a plurality of battery monomers 20 in box 10 of being convenient for to improve the convenience in the assembly process, make the efficiency of assembly obtain promoting, and then the beat of the production of acceleration.

It is to be understood that in a rectangular array structure, a plurality of rows are included along the first array direction X, wherein the number of the plurality of rows may be two, three, four, five, six, seven, eight, nine, ten, etc.

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

In some embodiments of the present application, as shown in fig. 7 to 10, the heat exchange assembly 30 further includes a second heat exchange portion 32, where the second heat exchange portion 32 includes a plurality of second heat exchange members 321, and at least a portion of the second heat exchange members 321 are disposed between two adjacent battery cells 20, and the second heat exchange members 321 are in heat-conducting connection with the adjacent two battery cells 20.

Specifically, the heat conduction connection between the second heat exchange member 321 and the two adjacent battery monomers 20 means that the second heat exchange member 321 can exchange heat with the two adjacent battery monomers 20, and the second heat exchange member 321 can be used for heating only the battery monomers 20, cooling only the battery monomers 20, and heating and cooling both the battery monomers 20.

The second heat exchanging member 321 in the second heat exchanging portion 32 is disposed between two adjacent battery cells 20, and the two adjacent battery cells 20 are heat exchanged by the second heat exchanging member 321. On the basis of the first heat exchange part 31, the second heat exchange part 32 is added, so that the effective heat exchange of the battery cells 20 in the rectangular array structure can be further improved, and the heat exchange effect is further improved.

It should be noted that the second heat exchange member 321 and the battery cell 20 may be directly adhered to each other, and heat exchange between the two may be performed, and the second heat exchange member 321 and the battery cell 20 may be adhered together by heat-conducting adhesive, and heat exchange between the two may be performed by heat-conducting adhesive.

In some embodiments of the present application, as shown in fig. 7 and 8, the second heat exchanging members 321 are disposed along the first array direction X, and at least a portion of the battery cells 20 are respectively thermally connected to the second heat exchanging members 321 in two columns disposed adjacently.

Specifically, the second heat exchange member 321 is used for exchanging heat between the battery cells 20 in two adjacent columns, that is, exchanging heat between a plurality of battery cells 20 is realized by using one component, so that the structure of the heat exchange assembly 30 can be simplified, the space occupation in the box 10 is reduced, the space utilization in the box 10 is improved, and meanwhile, the manufacturing cost is reduced.

It should be understood that, in the first array direction X, the heat exchange areas of the same second heat exchange member 321 and the battery cells 20 in two rows disposed adjacently may be equal or different.

In some embodiments of the present application, as shown in fig. 7, the plurality of side walls further includes a second side wall 23, the second side wall 23 is disposed to intersect the first side wall 21, and among the plurality of side walls, the second side wall 23 is a side wall having the largest area, and the second side wall 23 is thermally connected to the second heat exchanging member 321. By the arrangement, the contact area between the battery monomer 20 and the second heat exchange piece 321 can be increased, so that the heat exchange efficiency of the second heat exchange piece 321 to the battery monomer 20 is further improved.

Specifically, the second side wall 23 and the first side wall 21 are intersected (the angle between the two is greater than 0 degree and less than 180 degrees, for example, may be 90 degrees, etc.), and by thermally conducting the "large surface (the second side wall 23, i.e., the side wall with the largest area)" of the battery cell 20 and the second heat exchange member 321, the contact area between the battery cell 20 and the second heat exchange member 321 can be increased, so that the heat exchange efficiency of the second heat exchange member 321 to the battery cell 20 is further improved.

In some embodiments of the present application, as shown in fig. 9 and 10, the second heat exchanging members 321 are disposed along the second array direction Y, and at least a part of the battery cells 20 in two adjacent rows are respectively thermally connected to the second heat exchanging members 321.

It should be understood that, in the second array direction Y, the heat exchange areas of the same second heat exchange member 321 and the battery cells 20 in two rows disposed adjacently may be equal or different.

In some embodiments of the present application, as shown in fig. 9, the plurality of side walls further includes a second side wall 23 and a third side wall, the second side wall 23 and the third side wall are disposed to intersect the first side wall 21, respectively, and among the plurality of side walls, the second side wall 23 is a side wall having the largest area, and the third side wall is thermally connected to the second heat exchanging member 321.

Specifically, in the use process of the battery device 100, the battery cell 20 will expand, and the expansion position will generally appear on the side wall with the largest area, and the second heat exchange member 321 is in heat-conducting connection with the third side wall, so that an expansion space can be provided for the use process of the battery cell 20, thereby improving the safety performance of the battery device 100.

In some embodiments of the present application, as shown in fig. 4, the first heat exchanging member 311 is a first plate-like member, and a thickness direction of the first plate-like member coincides with the height direction Z of the case 10.

By the arrangement, the occupation of the internal space of the box body 10 can be further reduced, and the space utilization rate in the box body 10 can be improved.

In some embodiments of the present application, the second heat exchanging member 321 is a second plate-shaped member, and the arrangement direction of the two battery cells 20 disposed adjacent to each other in heat conductive connection with the second heat exchanging member 321 coincides with the thickness direction of the second plate-shaped member.

In some embodiments of the present application, at least one of the first heat exchanging member 311 and the second heat exchanging member 321 includes a medium flow passage for accommodating a heat exchanging medium.

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 and exchanging heat to the battery by using the heat exchange medium, the heat exchange efficiency to the battery cell 20 can be improved, and the heat exchange effect is effectively improved.

In some embodiments of the present application, as shown in fig. 6, the first heat exchanging element 311 includes a medium flow channel 3114, the medium flow channel 3114 includes a first flow channel portion 3115, the first flow channel portion 3115 extends along the second array direction Y, and at least one first flow channel portion 3115 is provided corresponding to each row.

Specifically, the first channel portions 3115 are disposed inside the first heat exchange member 311, and the first channel portions 3115 are disposed in the second array, and all the battery cells in the same row can exchange heat with the heat exchange medium in the first channel portions 3115, where the number of the first channel portions 3115 exchanging heat with the battery cells in the same row may be one or plural (two or more), and when the number of the first channel portions 3115 is plural, the plural first channel portions are disposed in parallel at intervals, for example, two first channel portions 3115 are disposed for each battery cell row, and the electrode terminals 22 of the battery cells are disposed between the two first channel portions 3115 at intervals in the first array direction X.

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

In addition, when the number of the first flow path portions 3115 is plural, the heat exchange area with the battery cell can be increased, thereby improving the heat exchange effect with the battery cell.

In some embodiments of the present application, as shown in fig. 6, the medium flow channel 3114 further includes a second flow channel portion 3116, the second flow channel portion 3116 extends along the first array direction X, at least one second flow channel portion 3116 is provided corresponding to each cell in each row, and two ends of the second flow channel portion 3116 are respectively disposed in communication with two first flow channel portions 3115 disposed adjacently.

Specifically, the second channel portions 3116 are disposed inside the first heat exchange member 311, and the second channel portions 3116 are disposed to extend in a first array, each of the battery cells in the same row being capable of exchanging heat with the heat exchange medium in the second channel portions 3116, wherein the number of the second channel portions 3116 exchanging heat with each of the battery cells in the same row may be one or plural (two or more), and when the number of the second channel portions 3116 is plural, the plural second channels are disposed in parallel at intervals, for example, two second channel portions 3116 are disposed for each of the battery cells in the second array direction Y, and the electrode terminals 22 of the battery cells are disposed between the two second channel portions 3116 at intervals.

By providing the second flow path portion 3116, the contact area with the battery cell can be further increased, so that the heat exchange effect on the battery cell is further improved.

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 current collector 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.

Specifically, in the present application, the first heat exchange portion 31 and the second heat exchange portion 32 are respectively communicated with the second heat exchange portion, the second heat exchange portion is communicated with the external cooling system, the heat exchange medium flows into the first heat exchange portion 31 and the second heat exchange portion 32 through the second heat exchange portion, and the heat exchange medium after heat exchange between the first heat exchange portion 31 and the second heat exchange portion 32 and the battery cell 20 flows back to the cooling system through the second heat exchange portion.

The communication setting of the first heat exchange part 31 and the second heat exchange part 32 and an external cooling system is realized through the second heat exchange part, so that the cooling liquid can realize the communication setting of the first heat exchange piece 311 and the second heat exchange piece 321 by utilizing the second heat exchange part, thereby being convenient for the unified layout of the heat exchange assembly 30, and further improving the convenience of assembly.

In addition, the first heat exchange member 311 and the second heat exchange member 321 may be integrated or split.

The second heat exchange part, the first heat exchange piece 311 and the second heat exchange piece 321 can be of an integrated structure or a split structure.

When the second heat exchange part and the first heat exchange piece 311 and the second heat exchange piece 321 are in a split structure, the first heat exchange piece 311 and the second heat exchange piece 321 are respectively communicated with the second heat exchange part through pipelines.

It should be noted that the processing manner of the first heat exchanging element 311 includes, but is not limited to, casting, 3D printing, extruding or assembling welding, etc., and the processing manner of the second heat exchanging element 321 also includes, but is not limited to, casting, 3D printing, extruding or assembling welding, etc.

The processing modes of the first heat exchange piece 311 and the second heat exchange piece 321 may be the same or different, and taking the first heat exchange piece 311 as an example, the first heat exchange piece 311 is processed by assembling and welding. Specifically, as shown in fig. 5 and 6, the first heat exchanging member 311 includes a first plate body 3113 and a second plate body 3112, where the first plate body 3113 is a plate, a plurality of grooves are formed on the second plate body 3112 by stamping or the like, a body of the second plate body 3112 located between two adjacent grooves is connected to the first plate body 3113, each groove encloses a medium flow channel 3114 with the first plate body 3113, and a connection position of the first plate body 3113 and the second plate body 3112 is fixed (e.g. soldered or the like) by welding.

In some embodiments of the present application, the battery cell 20 further includes a pressure relief mechanism. Wherein, relief mechanism sets up on first lateral wall 21, dodges the hole 3111 and has the projection on first lateral wall 21, and relief mechanism is located the regional in projection place, or relief mechanism locates on one lateral wall in a plurality of lateral walls to relief mechanism and electrode terminal 22 locate on different lateral walls.

Specifically, the provision of the pressure release mechanism can improve the safety performance of the battery cell 20, so that the safety performance of the battery device 100 is improved, and in addition, the application scenario of the battery device 100 can be increased by setting the position of the pressure release mechanism.

The provision of the pressure release mechanism can improve the safety performance of the battery cell 20, so that the safety performance of the battery device 100 is improved, and in addition, the application scene of the battery device 100 can be increased by setting the position of the pressure release mechanism.

In some embodiments of the present application, as shown in fig. 7 or 9, the pressure relief mechanism is provided on the first sidewall 21, and the electrode terminal 22 includes a first electrode terminal 221 and a second electrode terminal 222 which are spaced apart, the first electrode terminal 221 and the second electrode terminal 222 being respectively spaced apart on opposite sides of the pressure relief mechanism, and a center-to-center distance between the first electrode terminal 221 and the second electrode terminal 222 being in a range of 50mm to 200 mm.

Specifically, the first heat exchanging member 311, the pressure release mechanism, the first electrode terminal 221 and the second electrode terminal 222 are disposed on the same side of the battery cell 20, and the pressure release mechanism, the first electrode terminal 221 and the second electrode terminal 222 are disposed in the same direction, the first heat exchanging member 311 is disposed on the top of the first side wall 21, and the pressure release mechanism, the first electrode terminal 221 and the second electrode terminal 222 are disposed in the avoidance hole 3111 of the first heat exchanging member 311. The pressure release mechanism is disposed between the first electrode terminal 221 and the second electrode terminal 222 at intervals.

Through setting the center distance between the first electrode terminal 221 and the second electrode terminal 222 in the range of 50 mm to 200 mm, the first side wall 21 can provide a larger space for the first heat exchanging member 311, so that the contact area between the first heat exchanging member 311 and the first side wall 21 can be increased, and the heat exchanging efficiency of the first heat exchanging member 311 to the battery cell 20 is further improved.

Note that specific values of the center distance between the first electrode terminal 221 and the second electrode terminal 222 may be 50 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.

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

Specifically, the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 60 mm to 100 mm, and by further controlling the distance between the first electrode terminal 221 and the second electrode terminal 222, the space where the first side wall 21 is located outside the first electrode terminal 221 and the second electrode terminal 222 can be larger to increase the contact area of the first heat exchanging portion 31 and the first side wall 21, thereby improving the heat exchanging efficiency of the first heat exchanging portion 31 for the battery cell 20.

Note that specific values of the center distance between the first electrode terminal 221 and the second electrode terminal 222 may be 60 mm, 70 mm, 80 mm, 90 mm, 100 mm.

In some embodiments of the present application, the pressure relief mechanism is provided on one of the plurality of side walls, and the pressure relief mechanism is provided on a different side wall from the electrode terminal 22, the electrode terminal 22 includes a first electrode terminal 221 and a second electrode terminal 222 provided at a spacing, and a center-to-center distance between the first electrode terminal 221 and the second electrode terminal 222 is in a range of 30 mm to 200 mm.

By setting the center distance between the first electrode terminal 221 and the second electrode terminal 222 in the range of 30 mm to 200 mm, the first side wall 21 can provide a larger space for the first heat exchanging portion 31 without adversely affecting the first electrode terminal 221, the second electrode terminal 222 and the pressure release mechanism, so that the contact area between the first heat exchanging portion 31 and the first side wall 21 can be increased, and the heat exchanging efficiency of the first heat exchanging portion 31 to the battery cell 20 can be improved.

Note that specific values of the center distance between the first electrode terminal 221 and the second electrode terminal 222 may 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.

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

Specifically, the center distance between the first electrode terminal 221 and the second electrode terminal 222 is in the range of 40 mm to 80 mm, and by further controlling the distance between the first electrode terminal 221 and the second electrode terminal 222, the space where the first side wall 21 is located outside the first electrode terminal 221 and the second electrode terminal 222 can be larger, so that the contact area of the first heat exchanging portion 31 and the first side wall 21 is increased, and the heat exchanging efficiency of the first heat exchanging portion 31 to the battery cell 20 is improved.

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

In some embodiments of the present application, the relief hole 3111 has a projection on the first sidewall 21, the electrode terminal 22 is located in an area where the projection is located, and a minimum distance of the electrode terminal 22 from an edge of the projection is 5 mm or more.

Specifically, the first heat exchanging member 311 is a metal member, and setting the minimum distance between the electrode terminal 22 and the projected edge to be 5 mm or more enables good insulation between the electrode terminal 22 and the first heat exchanging member 311 to improve the safety performance of the battery device 100.

It should be noted that the minimum distance of the electrode terminal 22 from the projected edge may be 5 mm, 6mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm.

In some embodiments of the present application, the heat exchange assembly 30 further includes a heat conductive adhesive layer 33, and the first heat exchange member 311 is connected to the first sidewall 21 of each battery cell 20 through the heat conductive adhesive layer 33.

Specifically, the first heat exchange member 311 is connected to the first side wall 21 of each battery cell 20 through the heat conducting glue layer 33, so that the heat exchange uniformity of the first heat exchange member 311 to each battery cell 20 can be effectively improved, and the heat exchange effect is effectively improved.

As shown in fig. 1 to 10, a second aspect of the present application proposes a powered device comprising a battery device 100 as above.

In the battery device 100 of the electric equipment, the electrode terminal 22 of the battery monomer 20 occupies space in the box 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, so that the condition that the first heat exchange part 31 occupies the space of the box 10 independently is reduced, the structure in the box 10 is more compact, and the space utilization rate of the box 10 is improved.

In an embodiment of the present application, as shown in fig. 2 to 10, the present application proposes a battery device 100, where the battery device 100 includes a case 10, a heat exchange assembly 30, and a plurality of battery cells 20, the plurality of battery cells 20 are disposed in the case 10 in an array structure, the battery cells 20 include electrode terminals 22 and a plurality of side walls, the plurality of side walls include first side walls 21, the electrode terminals 22 are disposed on the first side walls 21, all of the electrode terminals 22 of the plurality of battery cells 20 are oriented identically, the heat exchange assembly 30 includes a first heat exchange portion 31, the first heat exchange portion 31 includes a first heat exchange member 311, the first heat exchange member 311 is located on the same side as the electrode terminals 22 and is connected to the first side walls 21, a plurality of relief holes 3111 are disposed on the first heat exchange member 311, and the electrode terminals 22 on each battery cell 20 are disposed in one relief hole 3111.

Specifically, the electrode terminal 22 of the battery cell 20 occupies a space in the case 10, the first heat exchange portion 31 is disposed on the same side as the electrode terminal 22 of the battery cell 20, and the first heat exchange portion 31 is disposed in the space occupied by the electrode terminal 22, so that the space occupied by the first heat exchange portion 31 alone in the case 10 is reduced, the structure in the case 10 is more compact, and the space utilization of the case 10 is improved.

Further, along the height direction Z of the case 10, the inside of the case 10 includes an inner bottom surface 121 and an inner top surface that are disposed opposite to each other. Wherein the electrode terminal 22 is disposed toward the inner bottom surface 121, or the electrode terminal 22 is disposed toward the inner top surface. The array structure is a rectangular array structure, the rectangular array structure comprises a first array direction X and a second array direction Y which are perpendicular to each other, the rectangular array structure comprises a plurality of rows, each row comprises a plurality of battery cells 20, the second array direction Y comprises a plurality of columns, each column comprises a plurality of battery cells 20, one of the first array direction X and the second array direction Y is the length direction of the box 10, and the other is the width direction of the box 10.

Further, the heat exchange assembly 30 further includes a second heat exchange portion 32, where the second heat exchange portion 32 includes a plurality of second heat exchange members 321, and one second heat exchange member 321 is disposed between at least part of two adjacent battery cells 20, and the second heat exchange member 321 is in heat-conducting connection with two adjacent battery cells 20.

In some examples of this embodiment, the second heat exchanging members 321 are disposed along the first array direction X, and at least a portion of the battery cells 20 are respectively in heat conductive connection with the second heat exchanging members 321 in two columns disposed adjacently. The plurality of side walls further comprises a second side wall 23, the second side wall 23 is intersected with the first side wall 21, and 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 conduction connection with the second heat exchange piece 321. By the arrangement, the contact area between the battery monomer 20 and the second heat exchange piece 321 can be increased, so that the heat exchange efficiency of the second heat exchange piece 321 to the battery monomer 20 is further improved.

In some examples of this embodiment, the second heat exchanging members 321 are disposed along the second array direction Y, and at least a part of the battery cells 20 in two adjacent rows are respectively thermally connected to the second heat exchanging members 321. The plurality of side walls further includes a second side wall 23 and a third side wall, the second side wall 23 and the third side wall are respectively intersected 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 third side wall is in heat conduction connection with the second heat exchange member 321. With this arrangement, an expansion space can be provided for the use of the battery cell 20, thereby improving the safety performance of the battery device 100.

Further, the first heat exchanging 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 case 10, the second heat exchanging member 321 is a second plate-shaped member, and the arrangement direction of two adjacent battery cells 20 thermally connected to the second heat exchanging member 321 is consistent with the thickness direction of the second plate-shaped member.

Further, 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 current collector, which is respectively 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.

Further, the first heat exchanging element 311 includes a medium flow channel 3114, the medium flow channel 3114 includes a first flow channel portion 3115, the first flow channel portion 3115 extends along the second array direction Y, and at least one first flow channel portion 3115 is provided for each row. The medium flow channel 3114 further includes a second flow channel portion 3116, the second flow channel portion 3116 extends along the first array direction X, at least one second flow channel portion 3116 is provided for each cell in each row, and two ends of the second flow channel portion 3116 are respectively disposed in communication with two first flow channel portions 3115 disposed adjacently.

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 avoidance hole 3111 is provided with a projection on the first side wall 21, the pressure relief mechanism is located in an area where the projection is located, or the pressure relief mechanism is arranged on one side wall of the plurality of side walls, and the pressure relief mechanism and the electrode terminal 22 are arranged on different side walls.

In some examples of the present embodiment, the pressure relief mechanism is provided on the first side wall 21, and the electrode terminal 22 includes a first electrode terminal 221 and a second electrode terminal 222 provided at intervals, the first electrode terminal 221 and the second electrode terminal 222 being provided at opposite sides of the pressure relief mechanism, respectively, with a center-to-center distance between the first electrode terminal 221 and the second electrode terminal 222 being in the range of 60 mm to 100 mm.

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

Further, the relief hole 3111 has a projection on the first sidewall 21, the electrode terminal 22 is located in an area where the projection is located, and a minimum distance of the electrode terminal 22 from an edge of the projection is 5mm or more.

Further, the heat exchange assembly 30 further includes a heat conductive adhesive layer 33, and the first heat exchange member 311 is connected to the first sidewall 21 of each battery cell 20 through the heat conductive adhesive layer 33.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit the technical solution of the present application, and although the detailed description of the present application is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application, and all the modifications or substitutions are included in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that the battery device comprises:

a case;

The battery cells are arranged in the box body in an array structure, each battery cell comprises an electrode terminal and a plurality of side walls, each side wall comprises a first side wall, the electrode terminals are arranged on the first side walls, and all the electrode terminals of the battery cells 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 is located on the same side as the electrode terminal and connected with the first side wall, a plurality of avoidance holes are formed in the first heat exchange piece, and each electrode terminal on each battery cell is arranged in one of the avoidance holes.

2. The battery device according to claim 1, wherein the inside of the case includes an inner bottom surface and an inner top surface which are disposed opposite to each other in a height direction of the case;

3. The battery device according to claim 2, wherein the array structure is a rectangular array structure including a first array direction and a second array direction that are perpendicular to each other, the rectangular array structure including a plurality of rows each including a plurality of the battery cells therein, the rectangular array structure including a plurality of columns each including a plurality of the battery cells therein, wherein one of the first array direction and the second array direction is a length direction of the case and the other is a width direction of the case.

4. The battery device of claim 3, wherein the heat exchange assembly further comprises a second heat exchange portion, the second heat exchange portion comprises a plurality of second heat exchange members, one of the second heat exchange members is disposed between at least two adjacent battery cells, and the second heat exchange member is in heat conduction connection with the two adjacent battery cells.

5. The battery device according to claim 4, wherein the second heat exchanging members are arranged along the first array direction, and at least part of the battery cells in two adjacent columns are respectively in heat conduction connection with the second heat exchanging members.

6. The battery device of claim 5, wherein the plurality of side walls further comprises a second side wall disposed intersecting the first side wall, the second side wall being the largest area side wall of the plurality of side walls, the second side wall being in thermally conductive connection with the second heat exchange member.

7. The battery device according to claim 4, wherein the second heat exchanging members are disposed along the second array direction, and at least a part of the battery cells in two adjacent rows are respectively in heat-conductive connection with the second heat exchanging members.

8. The battery device of claim 7, wherein the plurality of side walls further comprises a second side wall and a third side wall, the second side wall and the third side wall are respectively arranged to intersect the first side wall, the second side wall is the side wall with the largest area among the plurality of side walls, and the third side wall is in heat conduction connection with the second heat exchange member.

9. The battery device according to claim 4, wherein the first heat exchanging member is a first plate-like member whose thickness direction coincides with a height direction of the case;

And/or the second heat exchange piece is a second plate-shaped piece, and the arrangement direction of the two adjacent battery monomers in heat conduction connection with the second heat exchange piece is 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 member and the second heat exchange member includes a media flow path for receiving a heat exchange medium.

11. The battery device according to claim 10, wherein the first heat exchanging member includes the medium flow passage including first flow passage portions extending in the second array direction, at least one of the first flow passage portions being provided for each of the rows.

12. The battery device according to claim 11, wherein the medium flow passage further comprises second flow passage portions extending in the first array direction, at least one of the second flow passage portions is provided for each of the battery cells in each of the rows, and both ends of the second flow passage portions are respectively provided in communication with two of the first flow passage portions provided adjacently.

13. The battery device of claim 10, wherein the first heat exchange member and the second heat exchange member each include a media flow passage, the heat exchange assembly further comprising a current collector in communication with the media flow passages of the first heat exchange member and the second heat exchange member, respectively.

14. The battery device of any one of claims 1 to 13, wherein the battery cell further comprises a pressure relief mechanism;

the pressure relief mechanism is arranged on the first side wall, the avoidance hole is provided with projection on the first side wall, the pressure relief mechanism is positioned in an area where the projection is positioned, or the pressure relief mechanism is arranged on one side wall 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 disposed on the first side wall, the electrode terminals include first and second electrode terminals disposed at intervals, the first and second electrode terminals being disposed at intervals on opposite sides of the pressure relief mechanism, respectively, and a center-to-center distance between the first and second electrode terminals is in a range of 50 millimeters to 200 millimeters.

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

17. The battery device of claim 14, wherein the pressure relief mechanism is disposed on one of the side walls and the pressure relief mechanism and the electrode terminal are disposed on different ones of the side walls, the electrode terminal including first and second electrode terminals disposed at intervals, a center-to-center distance between the first and second electrode terminals being in a range of 30 millimeters to 200 millimeters.

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

19. The battery device according to any one of claims 1 to 13, wherein the escape hole has a projection on the first side wall, the electrode terminal is located in a region where the projection is located, and a minimum distance of the electrode terminal from an edge of the projection is 5mm or more.

20. The battery device of any one of claims 1 to 13, wherein the heat exchange assembly further comprises a thermally conductive adhesive layer, the first heat exchange member being connected to the first side wall of each of the battery cells by the thermally conductive adhesive layer.

21. A powered device comprising a battery arrangement according to any of claims 1 to 19.