Battery devices and electrical equipment

Abstract

The present application discloses a battery device and an electrical equipment, the battery device comprises a thermal management component and a plurality of battery cells, the plurality of battery cells constitute at least two array groups, the at least two array groups are arranged along a first direction, the first direction is the length direction or width direction of the battery device, each array group comprises at least one battery cell, a thermal management component is arranged between two adjacent array groups, the thermal management component comprises a heat exchanger and a heat insulating component arranged along a second direction, the heat exchanger is thermally connected to the battery cells in the two array groups respectively, at least part of the body of the heat insulating component is used to block heat transfer between the battery cells in the two adjacent array groups, the second direction is arranged to intersect with the first direction. When a battery cell on one side of the thermal management component undergoes thermal runaway, the heat insulating component can insulate the battery cell that generates heat, thereby reducing the situation where the thermal runaway battery cell causes thermal runaway of other battery cells.

Description

Technical Field

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

[0002] With the development of new energy, more and more fields are using new energy as a power source. Due to its advantages such as high energy density, rechargeable, safe and environmentally friendly, battery devices are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0003] In the related art, a battery device includes a plurality of battery cells arranged in an array. When a battery cell experiences thermal runaway during use, the heat generated by the thermal runaway battery cell may cause thermal runaway of adjacent batteries, increasing the potential safety hazard of the battery device. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which solves the problem that thermal runaway of one battery cell causes thermal runaway of other battery cells.

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

[0006] A plurality of battery cells, wherein the plurality of battery cells form at least two array groups, wherein the at least two array groups are arranged along a first direction, wherein the first direction is a length direction or a width direction of the battery device, and each array group includes at least one battery cell;

[0007] A thermal management component is provided between two adjacent array groups. The thermal management component includes a heat exchange component and a heat insulating component arranged along a second direction. The heat exchange component is thermally connected to the battery cells in the two array groups respectively. At least part of the body of the heat insulating component is used to block heat transfer between the battery cells in the two adjacent array groups. The second direction is arranged to intersect with the first direction.

[0008] In the present application, when a battery cell on one side of a thermal management component experiences thermal runaway, the thermal insulation component can insulate the battery cell generating heat, reducing the heat transfer to the battery cell on the other side of the thermal management component, thereby reducing the situation where the thermal runaway battery cell causes thermal runaway in other battery cells. In addition, the heat exchange component can exchange heat between the battery cells, which can further reduce the heat transfer from the thermal runaway battery cell to other battery cells, thereby improving the safety performance of the battery device.

[0009] In some embodiments of the present application, the heat exchange element includes a medium flow channel, and the medium flow channel is used to accommodate the heat exchange medium. Such an arrangement can improve the heat exchange performance of the heat exchange element and can effectively achieve temperature regulation of the battery cell.

[0010] In some embodiments of the present application, the heat exchange element is a metal element with thermal conductivity. Such a configuration can improve the thermal conductivity of the heat exchange element and further improve the heat exchange element's ability to regulate the temperature of the battery cell.

[0011] In some embodiments of the present application, the metal part is an aluminum part, a steel part or a copper part. Such a configuration can effectively reduce the manufacturing cost.

[0012] In some embodiments of the present application, the heat exchange element is arranged in close contact with the battery cell. Such an arrangement can achieve effective heat exchange between the heat exchange element and the battery cell, thereby improving the heat exchange effect of the heat exchange element on the battery cell.

[0013] In some embodiments of the present application, the heat exchange element and the battery cell are connected via a heat-conducting medium, which can improve the heat exchange effect between the heat exchange element and the battery cell.

[0014] In some embodiments of the present application, along the first direction, one side of all battery cells in the same array group is thermally connected to the same heat exchange element. In this way, heat exchange can be achieved between one heat exchange element and all battery cells in two adjacent array groups, thereby reducing the number of heat exchange elements, simplifying the internal structure of the battery device, and further improving the convenience of assembly, so that the production cycle is accelerated.

[0015] In some embodiments of the present application, in two adjacent array groups, a heat insulating member is provided between the heat exchange member and between each pair of oppositely disposed battery cells. This arrangement enables each pair of oppositely disposed battery cells in two adjacent array groups to be separated by a heat insulating member, thereby improving the heat insulation effect.

[0016] In some embodiments of the present application, the battery cell includes multiple surfaces, the multiple surfaces include a first surface, the first surface is the surface with the largest area among the multiple surfaces, and the heat exchange component and the heat insulation component are respectively connected to different parts of the first surface. In this way, the heat insulation component can be used to insulate the surface with the largest area of ​​the battery cell, further improving the heat insulation effect of the battery cell. When the battery cell has thermal runaway, it can further reduce the heat transfer from the thermal runaway battery cell to the battery cell on the other side of the thermal management component, so that the safety of the battery is further improved.

[0017] In some embodiments of the present application, the first surface includes a central position, the heat insulating element has a first projection on the first surface, the heat exchange element has a second projection on the first surface, the second projection is located outside the area of ​​the first projection, and the central position is located within the area of ​​the first projection. In this way, the heat insulating element can be correspondingly arranged at a position where the battery cell generates more heat, thereby further improving the heat insulation effect on the battery cell.

[0018] In some embodiments of the present application, the thermal insulation element comprises:

[0019] A support portion, the support portion is connected to the first surface, the support portion has a minimum size along the first direction, the heat exchange element has a first preset size along the first direction, and the minimum size is greater than or equal to the first preset size;

[0020] At least one of the insulation part, the support part and the first surface is connected to the insulation part, the insulation part is arranged opposite to the center position and is used to block heat transfer between battery cells in two adjacent array groups, and the support part is arranged between the insulation part and the heat exchange member.

[0021] With such an arrangement, the heat insulation portion can be used to insulate the battery cells on opposite sides of the thermal management component, thereby reducing the situation in which, after a battery cell has thermal runaway, the heat of the battery cell having thermal runaway is transferred to other battery cells and causes thermal runaway in other battery cells. In addition, by setting the size of the support portion along the first direction, the support portion can be used to form a support between two adjacent battery cells, thereby reducing the situation in which the heat exchange component is crushed due to expansion of the battery cell.

[0022] In some embodiments of the present application, the first preset size is greater than or equal to 2 mm and less than or equal to 20 mm. This configuration allows the heat exchange element to have a sufficient size in the first direction to improve the heat exchange capacity of the heat exchange element, thereby improving the heat exchange effect on the battery cell.

[0023] In some embodiments of the present application, the first preset size is greater than or equal to 3 mm and less than or equal to 10 mm. Such a configuration can further improve the heat exchange capacity of the heat exchange element, so that the heat exchange effect of the heat exchange element on the battery cell is further improved.

[0024] In some embodiments of the present application, the heat exchange element has a second preset size along the second direction, and the second preset size is greater than or equal to 5 mm and less than or equal to 20 mm. This arrangement allows the heat exchange element to have a sufficient size in the second direction to improve the heat exchange capacity of the heat exchange element, thereby improving the heat exchange effect on the battery cell.

[0025] In some embodiments of the present application, the second preset size is greater than or equal to 6 mm and less than or equal to 10 mm. Such a configuration can further improve the heat exchange capacity of the heat exchange element, so that the heat exchange effect of the heat exchange element on the battery cell is further improved.

[0026] In some embodiments of the present application, the battery cell further includes an electrode terminal, the multiple surfaces further include a second surface, the second surface is arranged to intersect with the first surface, the electrode terminal is arranged on the second surface, the heat exchanger includes a first heat exchanger, along the second direction, the first heat exchanger is arranged closer to the second surface than the heat insulation member, and there is a minimum distance between the first heat exchanger and the second surface, the minimum distance is greater than 0 mm and less than or equal to 10 mm. In this way, the heat exchanger and the electrode terminal can be arranged at an interval, so that there is a safe distance between the first heat exchanger and the electrode terminal, thereby improving the safety performance of the battery cell.

[0027] In some embodiments of the present application, the minimum distance is greater than 0 mm and less than or equal to 5 mm. In this way, the space between two adjacent battery cells can be fully utilized while ensuring a safe distance between the first heat exchange element and the electrode terminal, thereby improving space utilization.

[0028] In some embodiments of the present application, the connection between the support portion and the first surface includes bonding, clamping, or connection via a connector.

[0029] The connection mode between the support portion and the first surface is set, and the assembly mode can be set according to assembly requirements, thereby improving the convenience of the assembly process and accelerating the production rhythm.

[0030] In some embodiments of the present application, the heat insulating portion is connected to the first surface, and the connection between the heat insulating portion and the first surface includes bonding, clamping or connection via a connecting piece.

[0031] The connection mode between the heat insulation part and the first surface is set, and the assembly mode can be set according to the assembly requirements, thereby improving the convenience in the assembly process and accelerating the production rhythm.

[0032] In some embodiments of the present application, the heat insulating part is a flexible member. Such a configuration can effectively absorb the expansion of two adjacent battery cells, thereby providing space for the expansion of the battery cells.

[0033] In some embodiments of the present application, the support member is a rubber member or a microporous foamed polypropylene member. This configuration enables the support member to form a support between two adjacent battery cells, thereby providing sufficient space for the heat exchange member and reducing the possibility of the heat exchange member being crushed.

[0034] In some embodiments of the present application, the heat insulating part is aerogel or aerogel filled with ceramics. Such a configuration enables the heat insulating part to provide space for the expansion of two adjacent battery cells while having heat insulating properties, thereby further improving the safety performance of the battery device.

[0035] In some embodiments of the present application, the supporting portion is a U-shaped frame, the heat insulating portion is arranged inside the U-shaped frame, and the heat exchange component is arranged outside the U-shaped frame.

[0036] With such arrangement, the support portion can be used to form support in the circumferential direction of the center position of the first surface of the battery cell, thereby reducing the situation where the heat exchange element is crushed due to expansion of the first surface.

[0037] In some embodiments of the present application, the outer peripheral surface of the heat insulating part is connected to the inner wall of the square frame. Such an arrangement improves the connection strength and stability between the heat insulating part and the supporting part.

[0038] In some embodiments of the present application, the U-shaped frame includes a first frame body, a second frame body, a third frame body and a fourth frame body connected in sequence, the first frame body and the third frame body are arranged at intervals in the second direction, the second frame body and the fourth frame body are arranged at intervals in the third direction, and the first direction, the second direction and the third direction intersect each other;

[0039] Among them, along the second direction, the first frame has a first width, the third frame has a third width, along the third direction, the second frame has a second width, the fourth frame has a fourth width, and at least two of the first width, the second width, the third width and the fourth width are equal.

[0040] Such an arrangement makes it easier to process the support portion, thereby improving the convenience of processing and further increasing the production rhythm.

[0041] In some embodiments of the present application, the first width, the second width, the third width and the fourth width are all equal to a first preset value, and the first preset value is greater than or equal to 5 mm and less than or equal to 30 mm. This arrangement enables the support member to have good structural strength, thereby providing better support performance.

[0042] In some embodiments of the present application, the first preset value is greater than or equal to 10 mm and less than or equal to 20 mm. Such a configuration can effectively provide installation space for the heat insulation part while providing good support performance, thereby further improving the heat insulation performance of two adjacent battery cells.

[0043] In some embodiments of the present application, along the first direction, the first frame has a first thickness, the second frame has a second thickness, the third frame has a third thickness, the fourth frame has a fourth thickness, and at least two of the first thickness, the second thickness, the third thickness, and the fourth thickness are equal. This arrangement makes it easier to process the support portion, thereby improving the convenience of processing and thereby increasing the production cycle.

[0044] In some embodiments of the present application, the first thickness, the second thickness, the third thickness, and the fourth thickness are all equal to the second preset value, and the second preset value is greater than the first preset size and is greater than or equal to 3 mm. In this way, it is possible to effectively reduce the space occupied in the first direction while providing good support performance, thereby improving the space utilization of the battery device.

[0045] In some embodiments of the present application, along the third direction, the minimum distance between the second frame and the edge of the battery cell is a first distance, which is greater than or equal to 0 mm and less than or equal to 10 mm. This arrangement can reduce the interference of the support portion with other components in the third direction.

[0046] In some embodiments of the present application, the first distance is greater than or equal to 0 mm and less than or equal to 5 mm. This arrangement can further reduce the interference problem of the support portion with other components in the third direction.

[0047] In some embodiments of the present application, along the third direction, the minimum distance between the fourth frame and the edge of the battery cell is the second distance, which is greater than or equal to 0 mm and less than or equal to 10 mm. This arrangement can reduce the interference of the support portion with other components in the third direction.

[0048] In some embodiments of the present application, the second distance is greater than or equal to 0 mm and less than or equal to 5 mm. This arrangement can further reduce the interference problem of the support portion with other components in the third direction.

[0049] In some embodiments of the present application, the heat exchange element includes a first heat exchange element and a second heat exchange element, and along the second direction, the first heat exchange element and the second heat exchange element are respectively arranged on opposite sides of the heat insulating element. Such an arrangement can improve the heat exchange capacity of the battery cell and further improve the heat exchange effect of the battery cell.

[0050] A second aspect of the present application provides an electrical device, which includes the battery device as described above.

[0051] In the electrical equipment of the present application, when a battery cell on one side of the thermal management component of the battery device experiences thermal runaway, the thermal insulation component can insulate the battery cell generating heat, reducing the heat transfer to the battery cell on the other side of the thermal management component, thereby reducing the situation where the thermal runaway battery cell causes thermal runaway in other battery cells. In addition, the heat exchange component can exchange heat between the battery cells, which can further reduce the heat transfer from the thermal runaway battery cell to other battery cells, thereby improving the safety performance of the battery device.

[0052] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application is shown schematically;

[0054] Figure 2 Schematically shows a structural diagram of a battery device according to an embodiment of the present application;

[0055] Figure 3 A partial structural diagram of a battery device according to an embodiment of the present application is schematically shown;

[0056] Figure 4 for Figure 3 A schematic diagram of a partially exploded structure of a battery device shown in ;

[0057] Figure 5 for Figure 4 A partial structural schematic diagram of the battery device shown;

[0058] Figure 6 for Figure 5 A schematic diagram of the exploded structure of the battery device shown in;

[0059] Figure 7 for Figure 6 A schematic diagram of the enlarged structure of the battery device shown in FIG.

[0060] Figure 8 for Figure 5 A schematic structural diagram of the structure shown in another perspective.

[0061] The reference numerals are as follows:

[0062] 1000. Vehicles;

[0063] 100, battery device; 200, controller; 300, motor;

[0064] 110. Array group;

[0065] 10. Battery cells;

[0066] 11. first surface; 12. second surface; 13. electrode terminal;

[0067] 20. Thermal management components;

[0068] 21. Heat exchange parts;

[0069] 211, first heat exchange element; 212, second heat exchange element; 213, medium flow channel;

[0070] 22. Thermal insulation;

[0071] 221, support part;

[0072] 2211, first frame; 2212, second frame; 2213, third frame; 2214, fourth frame;

[0073] 222, thermal insulation unit;

[0074] 120, box body;

[0075] 1201, first box;

[0076] 1202, second box;

[0077] X, first direction; Y, second direction; Z, third direction; a, first preset value; b, second preset size; c, minimum distance; d, first distance; e, second distance; f, first preset size; g, second preset value; p, center position. DETAILED DESCRIPTION

[0078] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0079] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0080] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0081] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0082] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0083] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0084] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0085] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0086] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0087] In the related art, a battery device includes a plurality of battery cells arranged in an array. When a battery cell experiences thermal runaway during use, the heat generated by the thermal runaway battery cell may cause thermal runaway of adjacent batteries, increasing the potential safety hazard of the battery device.

[0088] In order to solve the above problems, in the present application, the battery device includes a thermal management component and a plurality of battery cells, the plurality of battery cells constitute at least two array groups, the at least two array groups are arranged along a first direction, the first direction is the length direction or width direction of the battery device, each array group includes at least one battery cell, a thermal management component is arranged between two adjacent array groups, the thermal management component includes a heat exchanger and a heat insulating component arranged along a second direction, the heat exchanger is thermally connected to the battery cells in the two array groups respectively, at least part of the body of the heat insulating component is used to block heat transfer between the battery cells in the two adjacent array groups, and the second direction is arranged to intersect with the first direction. When the battery cell on one side of the thermal management component has thermal runaway, the heat insulating component can insulate the battery cell that has heat, reduce the heat transfer to the battery cell on the other side of the thermal management component, thereby reducing the situation where the thermal runaway battery cell causes other battery cells to have thermal runaway, and in addition, the heat exchanger can exchange heat with the battery cell, which can further reduce the heat transfer of the thermal runaway battery cell to other battery cells, thereby improving the safety performance of the battery device.

[0089] The technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0090] For example, Figure 1As shown, it is a structural schematic diagram of a vehicle 1000 of one embodiment of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 300, a controller 200 and a battery device 100 can be arranged inside the vehicle 1000. The controller 200 is used to control the battery device 100 to power the motor 300. For example, a battery device 100 can be arranged at the bottom or the front or rear of the vehicle 1000. The battery device 100 can be used for powering the vehicle 1000. For example, the battery device 100 can be used as an operating power supply for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power demand of the vehicle 1000 during startup, navigation and operation. In another embodiment of the present application, the battery device 100 can not only be used as an operating power supply for the vehicle 1000, but also as a driving power supply for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0091] The battery device 100 (Battery Apparatus) mentioned in the embodiment 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 10, and the plurality of battery cells 10 are connected in series, in parallel or in mixed connection through a busbar component.

[0092] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 10 .

[0093] As an example, the battery cell assembly may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 10 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 10 by a cable tie.

[0094] In some embodiments, the battery device 100 may be a battery pack, which includes a case 120 and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case 120 .

[0095] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body 120 by fixing the battery module in the box body 120 .

[0096] As an example, the battery cell assembly may also be accommodated in the case 120 by directly fixing the plurality of battery cells 10 to the case 120 .

[0097] As an example, the box 120 may include a first box 1201 and a second box 1202. The first box 1201 and the second box 1202 are buckled together to form a closed space inside the box 120 to accommodate the battery monomer assembly. The closed space here means covering or closing, which can be sealed or unsealed. The first box 1201 can be a top cover or a bottom plate.

[0098] As an example, the box body 120 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 120 to accommodate the battery cell assembly.

[0099] In some embodiments, the box 120 may be a part of the chassis structure of the vehicle 1000. For example, a portion of the box 120 may become at least a part of the floor of the vehicle 1000, or a portion of the box 120 may become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0100] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells 10, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles 1000, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0101] In some embodiments of the present application, the battery cell 10 may be a secondary battery. A secondary battery refers to a battery cell 10 that can be continuously used by activating active materials by charging after the battery cell 10 is discharged.

[0102] The battery cell 10 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0103] In some embodiments of the present application, the battery cell 10 includes a shell, a pressure relief mechanism, an electrode assembly and an insulating member. The shell includes multiple side walls, including a first side wall. A pressure relief mechanism is provided on the first side wall. The pressure relief mechanism is configured to open or close according to whether the internal pressure of the shell reaches a pressure threshold. The electrode assembly is arranged inside the shell, and the insulating member is arranged inside the shell and between the shell and the electrode assembly for insulating and isolating the shell and the electrode assembly. The insulating member abuts against the electrode assembly.

[0104] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present application.

[0105] The electrode assembly includes a positive electrode, a negative electrode, and a separator, and the separator is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell 10, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0106] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet 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.

[0107] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0108] As an example, the positive electrode current collector may be 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 or silver, etc., may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0109] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates may include, but are not limited to, lithium iron phosphate (such as LiFePO 4 (also referred to as LFP), composite materials of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO 4 ), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include but are not limited to lithium cobalt oxide (such as LiCoO 2 ), lithium nickel oxide (such as LiNiO 2 ), lithium manganese oxide (such as LiMnO 2 、LiMn 2 O 4 ), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3O 2 (Also referred to as NCM 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O 2 (Also referred to as NCM 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O 2 (Also referred to as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O 2 (Also referred to as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O 2 (Also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.8 Co 0.15 Al 0.05 O 2 ) and at least one of its modified compounds. The modified compound refers to a substance obtained by modification means such as doping or coating on the basis of the above substances.

[0110] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a foamed nickel, a foamed copper, a foamed aluminum, a foamed alloy, or a foamed carbon. When the foamed metal is used as the positive electrode, the positive electrode active material may not be disposed on the surface of the foamed metal, but of course, the positive electrode active material may also be disposed. As an example, the positive electrode active material is filled or / and deposited in the foamed metal.

[0111] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0112] As an example, the negative electrode current collector may be 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 or silver, etc., may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0113] 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.

[0114] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0115] As an example, the negative electrode active material may adopt the negative electrode active material for the battery cell 10 known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for the battery cell 10 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0116] In some embodiments, the negative electrode may be a foam metal. The foam metal may be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. When the foam metal is used as the negative electrode sheet, the surface of the foam metal may not be provided with a negative electrode active material, but of course, a negative electrode active material may also be provided.

[0117] As an example, a negative electrode active material may be filled and / or deposited in the negative electrode current collector.

[0118] 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.

[0119] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0120] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0121] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be coated on the surface of the separator.

[0122] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0123] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0124] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0125] In some embodiments, the electrode assembly is a laminate structure.

[0126] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0127] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0128] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0129] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0130] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0131] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0132] In some embodiments, the electrode sheet of the electrode assembly is provided with a tab, which can lead current out of the electrode assembly. The tab includes a positive tab and a negative tab.

[0133] In some embodiments, a pressure relief mechanism is disposed on the housing to discharge the internal gas of the battery cell 10 .

[0134] As an example, when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, it is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode sheet, negative electrode sheet, electrolyte and separator in the battery cell 10.

[0135] As an example, the pressure relief mechanism may be integrally formed with the housing.

[0136] As an example, the pressure relief mechanism may also be separately provided and connected to the housing.

[0137] The "actuation" mentioned in this application means that the pressure relief mechanism is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell 10 can be released. The action produced by the pressure relief mechanism may include but is not limited to: the components in the pressure relief mechanism move to form an exhaust channel, at least a part of the pressure relief mechanism ruptures, breaks, is torn or opened, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell 10 will be discharged from the actuated part as emissions. In this way, the battery cell 10 can be depressurized and cooled under controllable pressure or temperature, thereby reducing the potential for more serious accidents.

[0138] In some embodiments, when the outer shell is a non-sealed structure, the pressure relief mechanism can be set as a through hole to discharge the gas inside the battery cell 10.

[0139] The emissions from the battery cells 10 mentioned in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, and the like.

[0140] The positive electrode tab and the negative electrode tab can be led out from the same end of the electrode sheet, or can be led out from opposite ends of the electrode sheet respectively.

[0141] 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 multiple positive electrode tab layers, and multiple positive electrode tab layers are stacked together to form the positive electrode tab. The positive electrode tab may include at least two parts, one part is located between the main body of the pole piece and the insulating member, and the other part is located between the insulating member and the electrode lead-out member.

[0142] The insulating member can insulate at least part of the pole ear from the end face of the main body, thereby reducing the risk of the pole ear being inserted into the main body when the battery cell 10 is affected by external impact, vibration, etc., thereby reducing the risk of short circuit of the battery cell 10, which is beneficial to improving the reliability of the battery cell 10.

[0143] The insulating member may be an integral structure or a split structure. As an example, the insulating member is formed by connecting a plurality of independently formed parts. As another example, the insulating member is integrally formed by stamping.

[0144] For example, the insulating part is a plastic part, and the insulating part which is a plastic part is integrally formed by injection molding. The processing of the plastic part is convenient, and the manufacturing cost of the plastic part is low.

[0145] In some embodiments of the present application, the housing includes a shell and an end cover, the shell has an opening, the end cover is connected to the shell and closes the opening, the end cover constitutes a first side wall, and the pressure relief mechanism is arranged on the end cover.

[0146] In some embodiments of the present application, the shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film, etc. In some embodiments, the shell may be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell plays a role in protecting the electrode assembly, and a sealed bag is also included between the shell and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0147] In addition, the connection methods between the end cover and the shell include but are not limited to snap connection, bonding, welding or connection via a connector.

[0148] In some embodiments of the present application, the battery cell 10 further includes an electrode terminal 13, which is disposed on the end cap and electrically connected to the electrode assembly. The electrode terminal 13 is electrically connected to the pole tab of the electrode assembly. The electrode terminal 13 may be directly connected to the pole tab, or may be indirectly connected to the pole tab through a current collecting member. The electrode terminal 13 may be disposed on the end cap or on the housing. In the embodiment shown in the present application, the electrode terminal 13 is disposed on the end cap.

[0149] like Figures 2 to 8 As shown, in some embodiments of the present application, a battery device 100 is proposed, which includes a thermal management component 20 and a plurality of battery cells 10. The plurality of battery cells 10 constitute at least two array groups 110. The at least two array groups 110 are arranged along a first direction X. The first direction X is the length direction or the width direction of the battery device 100. Each array group 110 includes at least one battery cell 10. A thermal management component 20 is provided between two adjacent array groups 110. The thermal management component 20 includes a heat exchanger 21 and a heat insulating component 22 arranged along a second direction Y. The heat exchanger 21 is thermally connected to the battery cells 10 in the two array groups 110, respectively. At least a portion of the body of the heat insulating component 22 is used to block heat transfer between the battery cells 10 in the two adjacent array groups 110. The second direction Y is arranged to intersect with the first direction X.

[0150] Specifically, a plurality of battery cells 10 constitute at least two array groups 110, all array groups 110 are arranged along a first direction X, the heat exchanger 21 and the heat insulating member 22 in the heat pipe assembly are arranged along a second direction Y, and the first direction X and the second direction Y are arranged to intersect, wherein an angle between the first direction X and the second direction Y is greater than 0° and less than 180°, for example, it can be 30°, 60°, 90°, 120° or 150°, etc.

[0151] In the structure shown in the present application, the first direction X is perpendicular to the second direction Y. This arrangement facilitates the layout and installation of multiple battery cells 10.

[0152] In the present application, the heat exchange element 21 is a component with heat exchange capability. The heat exchange element 21 can adjust the temperature of the battery cell 10 , for example, it can lower the temperature of the battery cell 10 or increase the temperature of the battery cell 10 .

[0153] The heat exchange element 21 and the battery cell 10 are thermally connected, which means that heat can be transferred between the heat exchange element 21 and the battery cell 10 , and the heat exchange element 21 adjusts the temperature of the battery cell 10 by using the heat transfer.

[0154] In the present application, the thermal insulation member 22 is a component with a thermal insulation function, that is, the thermal insulation member 22 is a poor conductor of heat, and heat is not easily transferred through the thermal insulation member 22 .

[0155] In the present application, when a battery cell 10 on one side of the thermal management component 20 experiences thermal runaway, the thermal insulation component 22 can insulate the battery cell 10 that is generating heat, thereby reducing the heat transfer to the battery cell 10 on the other side of the thermal management component 20, thereby reducing the situation where the thermal runaway battery cell 10 causes thermal runaway in other battery cells 10.

[0156] In addition, the heat exchanger 21 can exchange heat with the battery cell 10 to maintain the battery cell 10 within the optimal operating temperature range. When the battery cell 10 on one side of the heat exchanger 21 experiences thermal runaway, the heat exchanger 21 also has a certain heat insulation ability for the battery cell 10 experiencing thermal runaway. The heat exchanger 21 actively reduces the temperature of the battery cell 10 to further reduce the heat transfer from the thermal runaway battery cell 10 to other battery cells 10, thereby improving the safety performance of the battery device 100.

[0157] It should be pointed out that, in the present embodiment, the battery device 100 may include a box body 120, which includes a first box body 1201 and a second box body 1202 that cover each other, the first box body 1201 and the second box body 1202 form a storage space, and a plurality of array groups 110 are arranged in the storage space. The box body 120 is used to protect the battery cells 10, reduce the impact of the external environment on the battery cells 10, and thereby improve the safety performance of the battery device 100.

[0158] In some embodiments of the present application, Figure 7 As shown, the heat exchange element 21 includes a medium flow channel 213, and the medium flow channel 213 is used to accommodate a heat exchange medium.

[0159] Specifically, the medium flow channel 213 is provided on the heat exchange element 21, and the heat exchange medium is contained in the medium flow channel 213. When the heat exchange element 21 exchanges heat with the battery cell 10, the heat exchange medium exchanges heat with the battery cell 10 through the heat exchange element 21, thereby adjusting the temperature of the battery cell 10. By providing the medium flow channel 213, the heat exchange performance of the heat exchange element 21 can be improved, and the temperature adjustment of the battery cell 10 can be effectively achieved.

[0160] It should be understood that the heat exchange medium is contained in the medium flow channel 213, and the heat exchange medium may flow in the medium flow channel 213 or may not flow in the medium flow channel 213. For example, the heat exchange medium may flow in the medium flow channel 213, and the medium flow channel 213 is connected to an external medium circulation device, and the medium circulation device drives the heat exchange medium to flow in the medium flow channel 213, thereby increasing the heat exchange efficiency of the heat exchange element 21 to the battery cell 10.

[0161] In addition, in the present application, the heat exchange medium may be ethylene glycol or a solution of ethylene glycol, etc.

[0162] It should be noted that the medium flow channel 213 is provided on the heat exchanger 21, and the medium flow channel 213 can be a straight flow channel or a curved flow channel. Taking the medium flow channel 213 as a straight flow channel as an example, the extension direction of the medium flow channel 213 can be consistent with the length direction of the heat exchanger 21, or can be set at an angle to the length direction of the heat exchanger 21.

[0163] In addition, the medium flow channel 213 may be a single flow channel, or may include a plurality of flow channel portions. When the medium flow channel 213 includes a plurality of flow channel portions, the plurality of flow channel portions may be arranged in parallel or may not be arranged in parallel.

[0164] In addition, the shape of the flow cross section of the medium flow channel 213 includes but is not limited to a circle, a polygon or an ellipse, etc. At the same time, the shape of the flow cross section of the medium flow channel 213 can be consistent with the shape of the cross section of the heat exchange element 21. For example, if the cross section of the heat exchange element 21 is rectangular, the shape of the flow cross section of the medium flow channel 213 is also rectangular. In this way, the flow cross section of the medium flow channel 213 can be further increased, thereby improving the capacity of accommodating the heat exchange medium.

[0165] The experiment was conducted with a battery cell 10 on one side of the thermal management component 20 experiencing thermal runaway. Under different conditions, the temperatures of the adjacent battery cells 10 were as shown in Table 1 below:

[0166] Table 1

[0167]

[0168] Experiments show that the thermal management assembly 20 composed of the heat exchanger 21 and the heat insulation 22 can effectively block heat, effectively reducing the heat transfer from the thermal runaway battery cell 10 to the adjacent battery cell 10, thereby effectively improving the safety performance of the battery device 100.

[0169] In some embodiments of the present application, the heat exchange element 21 is a metal element with thermal conductivity.

[0170] Specifically, a medium flow channel 213 is provided in the heat exchange component 21, and the heat exchange medium is contained in the medium flow channel 213. The heat exchange component 21 is configured as a metal component, and the metal component has better thermal conductivity, which can improve the thermal conductivity of the heat exchange component 21 and further improve the heat exchange component 21's ability to regulate the temperature of the battery cell 10.

[0171] In addition, the heat exchange element 21 is configured as a metal element, which has high structural strength and can effectively maintain the shape of the medium flow channel 213, thereby reducing the possibility of the medium flow channel 213 being crushed due to external force.

[0172] In some embodiments of the present application, the metal part is an aluminum part, a steel part or a copper part.

[0173] Specifically, the heat exchanger 21 is a metal part, and a medium flow channel 213 is opened in the heat exchanger 21, wherein the heat exchanger 21 which is a metal part can be set as an aluminum part, a steel part or a copper part. Such a setting can effectively reduce the manufacturing cost while taking into account the good thermal conductivity of the heat exchanger 21.

[0174] It should be pointed out that the processing methods of the metal heat exchanger 21 include but are not limited to casting or 3D printing.

[0175] In some embodiments of the present application, the heat exchange element 21 is disposed in close contact with the battery cell 10 .

[0176] Specifically, the heat exchange element 21 is arranged in contact with the outer surface of the battery cell 10 , that is, the heat exchange element 21 is in direct contact with the surface of the battery cell 10 , and the heat exchange element 21 exchanges heat with the battery cell 10 through the contact position between the two, thereby adjusting the temperature of the battery cell 10 .

[0177] The heat exchange element 21 is arranged in close contact with the outer surface of the battery cell 10 , so that effective heat exchange can be achieved between the heat exchange element 21 and the battery cell 10 , thereby improving the heat exchange effect of the heat exchange element 21 on the battery cell 10 .

[0178] In some embodiments of the present application, the heat exchange element 21 is connected to the battery cell 10 via a heat conducting medium.

[0179] Specifically, the heat exchange element 21 is indirectly connected to the outer surface of the battery cell 10 through a heat conductive medium, and the heat exchange element 21 exchanges heat with the battery cell 10 through the heat conductive medium. A heat conductive medium is arranged between the heat exchange element 21 and the battery cell 10. The use of the heat conductive medium can increase the heat exchange area between the heat exchange element 21 and the battery cell 10, thereby improving the heat exchange effect between the heat exchange element 21 and the battery cell 10.

[0180] It should be noted that the heat conducting medium includes but is not limited to heat conducting glue. For example, the heat conducting medium is heat conducting glue, which can not only connect the battery cell 10 with the heat exchanger 21 through heat conduction, but also fix the heat exchanger 21 on the battery cell 10.

[0181] In some embodiments of the present application, Figure 4 and Figure 5 As shown, along the first direction X, one side of all battery cells 10 in the same array group 110 is thermally connected to the same heat exchange element 21 .

[0182] Specifically, a plurality of battery cells 10 constitute at least two array groups 110, each array group 110 includes at least one battery cell 10, a thermal management component 20 is provided between two adjacent array groups 110, and a heat exchange component 21 in the thermal management component 20 is thermally connected to the battery cells 10 in the array groups 110 on both sides, wherein all the battery cells 10 in each array group 110 are thermally connected to the same heat exchange component 21 on one side along the first direction X. With such a configuration, heat exchange can be achieved between one heat exchange component 21 and all the battery cells 10 in two adjacent array groups 110, thereby reducing the number of heat exchange components 21, simplifying the internal structure of the battery device 100, and further improving the convenience of assembly, so that the production cycle is accelerated.

[0183] It should be pointed out that along the length direction of the array group 110 (the length direction is perpendicular to the first direction X, and when there are multiple battery cells 10 in each array group 110, the length direction is the arrangement direction of the multiple battery cells 10 in the same array group 110), the size of the heat exchange element 21 is greater than or equal to the size of the array group 110. Such a configuration can enable each battery cell 10 in the array group 110 to be effectively thermally connected to the heat exchange element 21, thereby improving the heat exchange effect on the battery cells 10.

[0184] In addition, the number of the heat insulating member 22 may be one or more.

[0185] When there is one thermal insulation member 22 , the thermal insulation member 22 thermally insulates all battery cells 10 of two adjacent array groups 110 , and along the length direction of the array group 110 , the size of the thermal insulation member 22 is greater than or equal to the size of the array group 110 .

[0186] When there are multiple thermal insulation members 22 , the multiple thermal insulation members 22 are arranged at intervals along the length direction of the array group 110 .

[0187] In some embodiments of the present application, Figure 4 and Figure 5 As shown, in two adjacent array groups 110 , a heat insulating member 22 is provided between each pair of oppositely disposed battery cells 10 .

[0188] Specifically, two adjacent array groups 110 include at least one pair of two oppositely arranged battery cells 10, each pair of two oppositely arranged battery cells 10 are arranged on opposite sides of the thermal management component 20, and a thermal insulation member 22 is arranged between each pair of two oppositely arranged battery cells 10. In this way, each pair of two oppositely arranged battery cells 10 can be effectively insulated, thereby improving the thermal insulation effect.

[0189] It should be noted that along the length direction of the array group 110 , the size of the heat insulating member 22 is less than or equal to the size of the battery cell 10 . This configuration can reduce the protrusion of the heat insulating member 22 , thereby reducing the interference of the heat insulating member 22 with other components of the battery device 100 .

[0190] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the battery cell 10 includes multiple surfaces, including a first surface 11 , which is the surface with the largest area among the multiple surfaces. The heat exchange component 21 and the heat insulation component 22 are respectively connected to different parts of the first surface 11 .

[0191] Specifically, the heat exchange element 21 is thermally connected to the first surface 11 . This configuration increases the contact area between the heat exchange element 21 and the battery cell 10 , thereby improving the heat exchange effect of the heat exchange element 21 on the battery cell 10 .

[0192] In addition, by connecting the thermal insulation member 22 to the first surface 11, the thermal insulation member 22 can be used to insulate the surface with the largest area of ​​the battery cell 10, thereby further improving the thermal insulation effect of the battery cell 10. When the battery cell 10 has thermal runaway, the heat transfer from the thermally runaway battery cell 10 to the battery cell 10 on the other side of the thermal management component 20 can be further reduced, thereby further improving the safety of the battery.

[0193] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the first surface 11 includes a center position p, the heat insulating element 22 has a first projection on the first surface 11, the heat exchange element 21 has a second projection on the first surface 11, the second projection is located outside the area of ​​the first projection, and the center position p is located within the area of ​​the first projection.

[0194] Specifically, the first surface 11 is the surface with the largest area among the multiple surfaces of the battery cell 10. During the use of the battery cell 10, the heat generated by the battery cell 10 is the largest on the first surface 11. At the same time, the position with the largest heat generation on the first surface 11 is the center position p of the first surface 11. By setting the center position p within the first projection of the thermal insulation component 22, it is possible to effectively insulate the position of the battery cell 10 that generates large heat, further reducing the heat transfer of the battery cell 10 to other battery cells 10, thereby further improving the thermal insulation effect of the battery cell 10.

[0195] It should be understood that the center position p of the first surface 11 refers to the geometric center of the first surface 11. For example, when the first surface 11 is circular, the center position p is the center of the circle; when the first surface 11 is rectangular, the center position p is the position where the diagonals of the rectangle intersect.

[0196] In addition, the first surface 11 is the surface with the largest area among the multiple surfaces of the battery cell 10. During the use of the battery cell 10, the battery cell 10 will generate heat and expand. The position on the first surface 11 is a position with large heat generation and large expansion. The center position p of the first surface 11 is located inside the first projection formed by the heat insulating member 22 on the first surface 11, so that the heat insulating member 22 is used to block the position of the first surface 11 with large heat generation to reduce heat transfer to other battery cells 10. At the same time, the second projection formed by the heat exchanger 21 on the first surface 11 is outside the first projection, so that the heat exchanger 21 is set away from the center position p of the first surface 11, thereby reducing the situation where the expansion of the first surface 11 squeezes the heat exchanger 21 and causes the medium flow channel 213 of the heat exchanger 21 to be crushed.

[0197] In some embodiments of the present application, Figure 5 , Figure 6 and Figure 8 As shown, the heat insulating member 22 includes a supporting portion 221 and a heat insulating portion 222, the supporting portion 221 is connected to the first surface 11, the supporting portion 221 has a minimum dimension along the first direction X, the heat exchange member 21 has a first preset dimension f along the first direction X, the minimum dimension is greater than or equal to the first preset dimension f, at least one of the supporting portion 221 and the first surface 11 is connected to the heat insulating portion 222, the heat insulating portion 222 is arranged relative to the center position p and is used to block heat transfer between the battery cells 10 in two adjacent array groups 110, and the supporting portion 221 is arranged between the heat insulating portion 222 and the heat exchange member 21.

[0198] Specifically, two adjacent array groups 110 constitute a plurality of pairs of battery cells 10 that are arranged opposite to each other, and the first surfaces 11 of each pair of battery cells 10 that are arranged opposite to each other are arranged opposite to each other. The heat exchange component 21 and the heat insulating component 22 are respectively arranged between the two battery cells 10, and the heat insulating portion 222 of the heat insulating component 22 at least blocks the center position p of the first surfaces 11 of the two battery cells 10 to prevent the two battery cells 10 from transferring heat to each other. The heat insulating portion 222 can be used to insulate the battery cells 10 on opposite sides of the thermal management component 20, thereby reducing the situation in which, when a battery cell 10 undergoes thermal runaway, the heat of the battery cell 10 that undergoes thermal runaway is transferred to other battery cells 10, thereby causing thermal runaway of other battery cells 10.

[0199] In addition, by setting the size of the support portion 221 along the first direction X, the support portion 221 can be used to form a support between two adjacent battery cells 10, thereby providing an accommodation space for the heat exchanger 21 and reducing the situation where the heat exchanger 21 is crushed due to expansion of the battery cell 10.

[0200] In some embodiments of the present application, Figure 8As shown, the first preset size f is greater than or equal to 2 mm and less than or equal to 20 mm.

[0201] Specifically, the first preset dimension f is set to be greater than or equal to 2 mm and less than or equal to 20 mm, so that the heat exchange element 21 has a sufficient dimension in the first direction X to improve the heat exchange capacity of the heat exchange element 21 , thereby improving the heat exchange effect on the battery cell 10 .

[0202] It should be noted that the first preset size f can specifically be 2 mm, 4 mm, 6 mm, 8 mm, 9 mm, 12 mm, 14 mm, 16 mm, 18 mm or 20 mm.

[0203] In some embodiments of the present application, Figure 8 As shown, the first preset size f is greater than or equal to 3 mm and less than or equal to 10 mm.

[0204] Specifically, setting the first preset size f to be greater than or equal to 3 mm and less than or equal to 10 mm can further improve the heat exchange capacity of the heat exchange element 21, so that the heat exchange effect of the heat exchange element 21 on the battery cell 10 is further improved.

[0205] It should be noted that the first preset size f may specifically be 3 mm, 5 mm, 7 mm or 10 mm.

[0206] In some embodiments of the present application, Figure 5 As shown, along the second direction Y, the heat exchange element 21 has a second preset size b, and the second preset size b is greater than or equal to 5 mm and less than or equal to 20 mm.

[0207] Specifically, the second preset size b is set to be greater than or equal to 5 mm and less than or equal to 20 mm, so that the heat exchange element 21 has a sufficient size in the second direction Y to improve the heat exchange capacity of the heat exchange element 21, thereby improving the heat exchange effect on the battery cell 10.

[0208] It should be noted that the second preset size b may specifically be 5 mm, 7 mm, 9 mm, 11 mm, 13 mm, 15 mm, 17 mm, 19 mm or 20 mm.

[0209] In some embodiments of the present application, Figure 5 As shown, the second preset size b is greater than or equal to 6 mm and less than or equal to 10 mm.

[0210] Specifically, setting the second preset size b to be greater than or equal to 6 mm and less than or equal to 10 mm can further improve the heat exchange capacity of the heat exchange element 21, so that the heat exchange effect of the heat exchange element 21 on the battery cell 10 is further improved.

[0211] It should be noted that the second preset size b may specifically be 6 mm, 8 mm or 10 mm.

[0212] In some embodiments of the present application, Figure 5 As shown, the battery cell 10 also includes an electrode terminal 13, and the multiple surfaces also include a second surface 12, the second surface 12 is arranged to intersect with the first surface 11, the electrode terminal 13 is arranged on the second surface 12, and the heat exchange element 21 includes a first heat exchange element 211. Along the second direction Y, the first heat exchange element 211 is arranged closer to the second surface 12 than the heat insulation element 22, and there is a minimum distance c between the first heat exchange element 211 and the second surface 12, and the minimum distance c is greater than 0 mm and less than or equal to 10 mm.

[0213] Specifically, in the present application, when the first heat exchanger 211 is a metal part, the first heat exchanger 211 needs to be spaced apart from the electrode terminal 13 to reduce the risk of arcing between the first heat exchanger 211 and the electrode terminal 13. By setting the minimum distance c between the first heat exchanger 211 and the second surface 12 to be greater than 0 mm and less than or equal to 10 mm, the first heat exchanger 211 and the electrode terminal 13 can be spaced apart, so that there is a safe distance between the first heat exchanger 211 and the electrode terminal 13, thereby improving the safety performance of the battery cell 10.

[0214] It should be noted that the minimum distance c can specifically be 0.5 mm, 1.5 mm, 2.5 mm, 3.5 mm, 4.5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 9.5 mm or 10 mm.

[0215] In some embodiments of the present application, Figure 5 As shown, the minimum distance c is greater than 0 mm and less than or equal to 5 mm.

[0216] Specifically, the minimum distance c between the first heat exchange member 211 and the second surface 12 is further set to be greater than 0 mm and less than or equal to 5 mm. In this way, while ensuring a safe distance between the first heat exchange member 211 and the electrode terminal 13, the space between two adjacent battery cells 10 can be fully utilized, thereby improving space utilization.

[0217] It should be noted that the minimum distance c may specifically be 1 mm, 2 mm, 3 mm, 4 mm or 5 mm.

[0218] In some embodiments of the present application, the connection between the support portion 221 and the first surface 11 includes bonding, clamping, or connection via a connector.

[0219] Specifically, the connection method between the support portion 221 and the first surface 11 is set to include bonding, clamping or connection via a connector. The assembly method can be set according to assembly requirements, thereby improving the convenience of the assembly process and speeding up the production rhythm.

[0220] For example, the support portion 221 is fixed to the first surface 11 by bonding, which has a simple structure and high connection strength, and can maintain the support portion 221 in the supported position, thereby improving the supporting effect. In addition, the bonding assembly method is simple and convenient for assembly operations, which can effectively improve the assembly efficiency and effectively speed up the production rhythm.

[0221] In some embodiments of the present application, the heat insulating portion 222 is connected to the first surface 11, and the connection between the heat insulating portion 222 and the first surface 11 includes bonding, clamping, or connection via a connector.

[0222] Specifically, the heat insulating portion 222 is connected to the first surface 11, so that the position of the heat insulating portion 222 is maintained, thereby effectively achieving the heat insulating effect.

[0223] In addition, the connection method between the insulation part 222 and the first surface 11 is set to include bonding, clamping or connection via a connector, and the assembly method can be set according to assembly requirements, thereby improving the convenience of the assembly process and speeding up the production rhythm.

[0224] For example, the insulation part 222 is fixed to the first surface 11 by bonding, which has a simple structure and high connection strength, and can keep the support part 221 in the supporting position, thereby improving the supporting effect. In addition, the bonding assembly method is simple and convenient for assembly operation, which can effectively improve the assembly efficiency and effectively speed up the production rhythm.

[0225] In some embodiments of the present application, the heat insulating portion 222 is a flexible member.

[0226] Specifically, in the present application, the heat insulating portion 222 is arranged relative to the center position p of the first surface 11. The first surface 11 is the surface with the largest area of ​​the battery cell 10. During the use of the battery cell 10, the deformation of the center position p of the first surface 11 is the largest. The heat insulating portion 222 is set as a flexible part, so that it can effectively absorb the expansion of two adjacent battery cells 10, thereby providing space for the deformation of the battery cell 10, thereby improving the safety performance of the battery device 100.

[0227] In some embodiments of the present application, the support member is a rubber member or a microporous foamed polypropylene member.

[0228] Specifically, the support member is configured as a rubber member or a microporous foamed polypropylene member, so that the support member can form a support between two adjacent battery cells 10, thereby providing sufficient space for the heat exchange member 21 and reducing the possibility of the heat exchange member 21 being crushed.

[0229] In some embodiments of the present application, the heat insulating portion 222 is aerogel or aerogel filled with ceramic.

[0230] Specifically, the heat insulating portion 222 is configured as aerogel or aerogel filled with ceramics, so that the heat insulating portion 222 can provide space for the expansion of two adjacent battery cells 10 on the basis of having heat insulating properties, thereby further improving the safety performance of the battery device 100.

[0231] In some embodiments of the present application, Figures 4 to 6 As shown, the support portion 221 is a U-shaped frame, the heat insulating portion 222 is arranged inside the U-shaped frame, and the heat exchange component 21 is arranged outside the U-shaped frame.

[0232] Specifically, the support portion 221 of the U-shaped frame forms a U-shaped projection on the first surface 11 of the battery cell 10, and the middle position of the first surface 11 is arranged inside the U-shaped projection, that is, the U-shaped frame is arranged along the circumference of the center position p of the first surface 11, and the support portion 221 can be used to form support in the circumference of the center position p of the first surface 11 of the battery cell 10.

[0233] Since the first surface 11 is the surface with the largest area of ​​the battery cell 10, during the use of the battery cell 10, the deformation and heat generation at the center position p of the first surface 11 are the largest. The support portion 221 is set as a U-shaped frame, the insulation portion 222 is set inside the U-shaped frame, and the heat exchange component 21 is set outside the U-shaped frame, thereby reducing the situation where the first surface 11 expands and causes the heat exchange component 21 to be crushed, and achieving effective isolation of the heat of the battery cell 10.

[0234] In some embodiments of the present application, the outer peripheral surface of the heat insulating portion 222 is connected to the inner wall of the U-shaped frame.

[0235] Specifically, the outer peripheral surface of the heat insulating portion 222 is connected to the inner wall of the U-shaped frame, thereby improving the connection strength and stability between the heat insulating portion 222 and the supporting portion 221.

[0236] It should be pointed out that the outer peripheral surface of the insulation part 222 and the inner wall of the U-shaped frame are connected by bonding. Such a setting can improve the connection strength between the insulation part 222 and the support part 221, and also facilitate the connection operation, which can speed up the production rhythm.

[0237] In some embodiments of the present application, Figure 5 As shown, the square-shaped frame includes a first frame body 2211, a second frame body 2212, a third frame body 2213 and a fourth frame body 2214 connected in sequence, the first frame body 2211 and the third frame body 2213 are arranged at intervals in the second direction Y, the second frame body 2212 and the fourth frame body 2214 are arranged at intervals in the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other. In which, along the second direction Y, the first frame body 2211 has a first width, the third frame body 2213 has a third width, along the third direction Z, the second frame body 2212 has a second width, the fourth frame body 2214 has a fourth width, and at least two of the first width, the second width, the third width and the fourth width are equal.

[0238] Specifically, the support portion 221 is a U-shaped frame, which is a rectangular structure. The first frame body 2211, the second frame body 2212, the third frame body 2213 and the fourth frame body 2214 are arranged in parallel in pairs. By setting the sizes of the four frames, it is convenient to process the support portion 221, so that the convenience of processing is improved, thereby improving the production rhythm.

[0239] In some embodiments of the present application, Figure 5 As shown, the first width, the second width, the third width and the fourth width are all equal to the first preset value a, and the first preset value a is greater than or equal to 5 mm and less than or equal to 30 mm.

[0240] Specifically, the first width of the first frame 2211, the second width of the second frame 2212, the third width of the third frame 2213 and the fourth width of the fourth frame 2214 in the U-shaped frame are set to be equal to the first preset value a, so that the structure of the U-shaped frame is uniform, so that the support has good structural strength, and thus can provide better supporting performance.

[0241] It should be pointed out that the first preset value a can specifically be 5 mm, 7 mm, 9 mm, 11 mm, 13 mm, 15 mm, 17 mm, 19 mm, 21 mm, 22 mm, 23 mm, 25 mm, 27 mm or 30 mm.

[0242] In some embodiments of the present application, the first preset value a is greater than or equal to 10 mm and less than or equal to 20 mm.

[0243] Specifically, the first preset value a is further set to be greater than or equal to 10 mm and less than or equal to 20 mm, which can effectively provide installation space for the insulation part 222 while providing good supporting performance, thereby further improving the insulation performance of two adjacent battery cells 10.

[0244] It should be noted that the first preset value a may specifically be 10 mm, 12 mm, 14 mm, 16 mm, 18 mm or 20 mm.

[0245] In some embodiments of the present application, Figure 8 As shown, along the first direction X, the first frame 2211 has a first thickness, the second frame 2212 has a second thickness, the third frame 2213 has a third thickness, and the fourth frame 2214 has a fourth thickness, and at least two of the first thickness, the second thickness, the third thickness and the fourth thickness are equal.

[0246] Specifically, the support portion 221 is a U-shaped frame, which is a rectangular structure. The first frame body 2211, the second frame body 2212, the third frame body 2213 and the fourth frame body 2214 are arranged in parallel in pairs. By setting the sizes of the four frames, it is convenient to process the support portion 221, so that the convenience of processing is improved, thereby improving the production rhythm.

[0247] In some embodiments of the present application, Figure 8 As shown, the first thickness, the second thickness, the third thickness and the fourth thickness are all equal to the second preset value g, and the second preset value g is greater than the first preset size f, and is greater than or equal to 3 mm.

[0248] Specifically, the first thickness of the first frame body 2211, the second thickness of the second frame body 2212, the third thickness of the third frame body 2213 and the fourth thickness of the fourth frame body 2214 in the U-shaped frame are set to be equal to the second preset value g, so that the structure of the U-shaped frame is uniform. Such a setting can effectively reduce the space occupied in the first direction X while providing good supporting performance, thereby improving the space utilization of the battery device 100.

[0249] In addition, the second preset value g is greater than the first preset size f and greater than or equal to 3 mm, so that the support member can form an accommodation space for the heat exchange member 21 between two connected battery cells 10, thereby reducing the situation where the battery cell 10 expands and causes the medium flow channel 213 of the heat exchange member 21 to be crushed.

[0250] It should be pointed out that the second preset value g can specifically be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm or 15 mm.

[0251] In some embodiments of the present application, Figure 5 As shown, along the third direction Z, the minimum distance c between the second frame 2212 and the edge of the battery cell 10 is the first distance d, and the first distance d is greater than or equal to 0 mm and less than or equal to 10 mm.

[0252] Specifically, the first distance d between the second frame 2212 and the edge of the battery cell 10 is set to be greater than or equal to 0 mm and less than or equal to 10 mm, thereby reducing the protrusion of the second frame 2212 relative to the battery cell 10 in the third direction Z, and can reduce the interference of the support portion 221 with other components in the third direction Z.

[0253] It should be noted that the first distance d can specifically be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0254] In some embodiments of the present application, Figure 5 As shown, the first distance d is greater than or equal to 0 mm and less than or equal to 5 mm.

[0255] Specifically, the first distance d between the second frame 2212 and the edge of the battery cell 10 is further set to be greater than or equal to 0 mm and less than or equal to 5 mm, which can further reduce the interference problem of the support portion 221 in the third direction Z with other components.

[0256] It should be noted that the first distance d can specifically be 0.5 mm, 1.5 mm, 2.5 mm, 3.5 mm, 4.5 mm, or 5 mm.

[0257] In some embodiments of the present application, Figure 5 As shown, along the third direction Z, the minimum distance c between the fourth frame 2214 and the edge of the battery cell 10 is the second distance e, and the second distance e is greater than or equal to 0 mm and less than or equal to 10 mm.

[0258] Specifically, the second distance e between the fourth frame 2214 and the edge of the battery cell 10 is set to be greater than or equal to 0 mm and less than or equal to 10 mm, thereby reducing the protrusion of the fourth frame 2214 relative to the battery cell 10 in the third direction Z, and can reduce the interference of the support portion 221 with other components in the third direction Z.

[0259] It should be noted that the second distance e can specifically be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0260] In some embodiments of the present application, Figure 5 As shown, the second distance e is greater than or equal to 0 mm and less than or equal to 5 mm.

[0261] Specifically, the second distance e between the fourth frame 2214 and the edge of the battery cell 10 is further set to be greater than or equal to 0 mm and less than or equal to 5 mm, which can further reduce the interference problem of the support part 221 in the third direction Z with other components.

[0262] It should be noted that the second distance e can specifically be 0.5 mm, 1.5 mm, 2.5 mm, 3.5 mm, 4.5 mm, or 5 mm.

[0263] In some embodiments of the present application, Figures 4 to 6 As shown, the heat exchange element 21 includes a first heat exchange element 211 and a second heat exchange element 212 . Along the second direction Y, the first heat exchange element 211 and the second heat exchange element 212 are respectively arranged on opposite sides of the heat insulating element 22 .

[0264] Specifically, the first heat exchange element 211 and the second heat exchange element 212 are provided to improve the heat exchange capacity of the battery cell 10 and further improve the heat exchange effect of the battery cell 10 .

[0265] like Figures 1 to 8 As shown, the second aspect of the present application provides an electric device, which includes the battery device 100 according to the above.

[0266] In the electrical equipment of the present application, when a battery cell 10 on one side of a thermal management component 20 of a battery device 100 experiences thermal runaway, the thermal insulation component 22 can insulate the battery cell 10 that generates heat, thereby reducing the heat transfer to the battery cell 10 on the other side of the thermal management component 20, thereby reducing the situation where the thermal runaway battery cell 10 causes thermal runaway of other battery cells 10. In addition, the heat exchange component 21 can exchange heat with the battery cell 10, which can further reduce the heat transfer of the thermal runaway battery cell 10 to other battery cells 10, thereby improving the safety performance of the battery device 100.

[0267] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0268] In the implementation mode of the present application, Figures 2 to 8As shown, the present application proposes a battery device 100, which includes a plurality of battery cells 10 and a thermal management component 20. The plurality of battery cells 10 constitute at least two array groups 110. The at least two array groups 110 are arranged along a first direction X. The first direction X is the length direction or the width direction of the battery device 100. Each array group 110 includes at least one battery cell 10. A thermal management component 20 is provided between two adjacent array groups 110. The thermal management component 20 includes a heat exchanger 21 and a heat insulating component 22 arranged along a second direction Y. The heat exchanger 21 is thermally connected to the battery cells 10 in the two array groups 110, respectively. At least a portion of the body of the heat insulating component 22 is used to block heat transfer between the battery cells 10 in the two adjacent array groups 110. The second direction Y is arranged to intersect with the first direction X.

[0269] Furthermore, the heat exchanger 21 includes a medium flow channel 213, and the medium flow channel 213 is used to accommodate a heat exchange medium. The heat exchanger 21 is a metal part with heat conductivity. The heat exchanger 21 is connected to the battery cell 10 through a heat conductive medium.

[0270] Furthermore, along the first direction X, the same side of all battery cells 10 in the same array group 110 is thermally connected to the same heat exchanger 21. In two adjacent array groups 110, a heat insulating member 22 is provided between the heat exchanger 21 and between each pair of oppositely disposed battery cells 10.

[0271] Furthermore, the battery cell 10 includes multiple surfaces, including a first surface 11, which is the surface with the largest area among the multiple surfaces, and the heat exchanger 21 and the heat insulation member 22 are respectively connected to different parts of the first surface 11. The first surface 11 includes a center position p, the heat insulation member 22 has a first projection on the first surface 11, and the heat exchanger 21 has a second projection on the first surface 11, the second projection is located outside the area of ​​the first projection, and the center position p is located within the area of ​​the first projection.

[0272] Further, the heat insulating member 22 includes a support portion 221 and a heat insulating portion 222, the support portion 221 is connected to the first surface 11, the support portion 221 has a minimum dimension along the first direction X, the heat exchange member 21 has a first preset dimension f along the first direction X, the minimum dimension is greater than or equal to the first preset dimension f, at least one of the support portion 221 and the first surface 11 is connected to the heat insulating portion 222, the heat insulating portion 222 is arranged relative to the center position p and is used to block heat transfer between the battery cells 10 in two adjacent array groups 110, and the support portion 221 is arranged between the heat insulating portion 222 and the heat exchange member 21. The first preset dimension f is greater than or equal to 3 mm and less than or equal to 10 mm. The heat exchange member 21 has a second preset dimension b, and the second preset dimension b is greater than or equal to 6 mm and less than or equal to 10 mm.

[0273] Furthermore, the battery cell 10 also includes an electrode terminal 13, and the multiple surfaces also include a second surface 12, the second surface 12 is arranged to intersect with the first surface 11, the electrode terminal 13 is arranged on the second surface 12, and the heat exchange element 21 includes a first heat exchange element 211 and a second heat exchange element 212. Along the second direction Y, the first heat exchange element 211 and the second heat exchange element 212 are respectively arranged on opposite sides of the heat insulation element 22, and the first heat exchange element 211 is arranged closer to the second surface 12 than the heat insulation element 22, and there is a minimum distance c between the first heat exchange element and the second surface 12, and the minimum distance c is greater than 0 mm and less than or equal to 5 mm.

[0274] Furthermore, the support portion 221 is bonded to the first surface 11 , the heat insulating portion 222 is connected to the first surface 11 , and the heat insulating portion 222 is bonded to the first surface 11 .

[0275] Furthermore, the heat insulating part 222 is a flexible part, and the heat insulating part 222 is aerogel or aerogel filled with ceramics. The supporting part is a rubber part or a microporous foamed polypropylene part.

[0276] Furthermore, the support part 221 is a square frame, the heat insulating part 222 is arranged inside the square frame, and the heat exchanger 21 is arranged outside the square frame. The outer peripheral surface of the heat insulating part 222 is connected to the inner wall of the square frame. The U-shaped frame includes a first frame body 2211, a second frame body 2212, a third frame body 2213 and a fourth frame body 2214 connected in sequence, the first frame body 2211 and the third frame body 2213 are arranged at intervals in the second direction Y, the second frame body 2212 and the fourth frame body 2214 are arranged at intervals in the third direction Z, the first direction X, the second direction Y and the third direction Z intersect each other, wherein, along the second direction Y, the first frame body 2211 has a first width, the third frame body 2213 has a third width, along the third direction Z, the second frame body 2212 has a second width, the fourth frame body 2214 has a fourth width, the first width, the second width, the third width and the fourth width are all equal to a first preset value a, and the first preset value a is greater than or equal to 10 mm and less than or equal to 20 mm. Along the first direction X, the first frame body 2211 has a first thickness, the second frame body 2212 has a second thickness, the third frame body 2213 has a third thickness, and the fourth frame body 2214 has a fourth thickness. The first thickness, the second thickness, the third thickness and the fourth thickness are all equal to the second preset value g, and the second preset value g is greater than the first preset size f and is greater than or equal to 3 mm.

[0277] Furthermore, along the third direction Z, the minimum distance c between the second frame 2212 and the edge of the battery cell 10 is the first distance d, and the first distance d is greater than or equal to 0 mm and less than or equal to 5 mm. Along the third direction Z, the minimum distance c between the fourth frame 2214 and the edge of the battery cell 10 is the second distance e, and the second distance e is greater than or equal to 0 mm and less than or equal to 5 mm.

[0278] In the present application, when a battery cell 10 on one side of a thermal management component 20 experiences thermal runaway, the thermal insulation component 22 can insulate the battery cell 10 that is generating heat, thereby reducing the heat transfer to the battery cell 10 on the other side of the thermal management component 20, thereby reducing the situation where the thermal runaway battery cell 10 causes thermal runaway in other battery cells 10. In addition, the heat exchange component 21 can exchange heat with the battery cell 10, which can further reduce the heat transfer from the thermal runaway battery cell 10 to other battery cells 10, thereby improving the safety performance of the battery device 100.

[0279] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: A plurality of battery cells, wherein the plurality of battery cells form at least two array groups, the at least two array groups are arranged along a first direction, the first direction being a length direction or a width direction of the battery device, and each of the array groups includes at least one battery cell; A thermal management component is provided between two adjacent array groups, the thermal management component includes a heat exchange component and a heat insulating component arranged along a second direction, the heat exchange component is thermally connected to the battery cells in the two array groups respectively, at least a part of the body of the heat insulating component is used to block heat transfer between the battery cells in the two adjacent array groups, and the second direction is arranged to intersect with the first direction.

2. The battery device according to claim 1, characterized in that The heat exchange element comprises a medium flow channel, and the medium flow channel is used to accommodate a heat exchange medium.

3. The battery device according to claim 2, characterized in that: The heat exchange component is a metal component with heat conductivity.

4. The battery device according to claim 3, characterized in that: The metal part is an aluminum part, a steel part or a copper part.

5. The battery device according to claim 1, wherein: The heat exchange element is arranged in close contact with the battery cell; Alternatively, the heat exchange element and the battery cell are connected via a heat conducting medium.

6. The battery device according to claim 1, wherein: Along the first direction, one side of all the battery cells in the same array group is thermally connected to the same heat exchange element.

7. The battery device according to claim 1, characterized in that: In two adjacent array groups, one thermal insulation member is provided between each pair of oppositely disposed battery cells.

8. The battery device according to claim 2, characterized in that: The battery cell includes a plurality of surfaces, wherein the plurality of surfaces include a first surface, which is a surface with the largest area among the plurality of surfaces, and the heat exchange component and the heat insulating component are respectively connected to different parts of the first surface.

9. The battery device according to claim 8, characterized in that: The first surface includes a center position, the heat insulating element has a first projection on the first surface, the heat exchange element has a second projection on the first surface, the second projection is located outside the area of ​​the first projection, and the center position is located within the area of ​​the first projection.

10. The battery device according to claim 9, characterized in that The thermal insulation element comprises: A support portion, the support portion is connected to the first surface, the support portion has a minimum size along the first direction, the heat exchange element has a first preset size along the first direction, and the minimum size is greater than or equal to the first preset size; The heat insulating portion, at least one of the support portion and the first surface is connected to the heat insulating portion, the heat insulating portion is arranged opposite to the center position and is used to block heat transfer between the battery cells in two adjacent array groups, and the support portion is arranged between the heat insulating portion and the heat exchange member.

11. The battery device according to claim 10, characterized in that: The first preset size is greater than or equal to 2 mm and less than or equal to 20 mm.

12. The battery device according to claim 11, characterized in that The first preset size is greater than or equal to 3 mm and less than or equal to 10 mm.

13. The battery device according to claim 11, characterized in that: Along the second direction, the heat exchange element has a second preset size, and the second preset size is greater than or equal to 5 mm and less than or equal to 20 mm.

14. The battery device according to claim 13, characterized in that: The second preset size is greater than or equal to 6 mm and less than or equal to 10 mm.

15. The battery device according to claim 8, characterized in that The battery cell also includes an electrode terminal, the multiple surfaces also include a second surface, the second surface is arranged to intersect with the first surface, the electrode terminal is arranged on the second surface, the heat exchange element includes a first heat exchange element, along the second direction, the first heat exchange element is arranged closer to the second surface than the heat insulation element, there is a minimum distance between the first heat exchange element and the second surface, the minimum distance is greater than 0 mm and less than or equal to 10 mm.

16. The battery device according to claim 15, characterized in that The minimum distance is greater than 0 mm and less than or equal to 5 mm.

17. The battery device according to claim 10, characterized in that: The connection between the support portion and the first surface includes bonding, clamping or connection via a connecting piece; And / or, the heat insulating portion is connected to the first surface, and the connection between the heat insulating portion and the first surface includes bonding, clamping or connection via a connecting piece.

18. The battery device according to claim 10, characterized in that: The heat insulation part is a flexible part.

19. The battery device according to claim 18, characterized in that The support part is a rubber part or a microporous foamed polypropylene part; And / or, the heat insulating part is aerogel or aerogel filled with ceramic.

20. The battery device according to claim 10, wherein: The supporting part is a U-shaped frame, the heat insulating part is arranged inside the U-shaped frame, and the heat exchange component is arranged outside the U-shaped frame.

21. The battery device according to claim 20, characterized in that The outer peripheral surface of the heat insulating part is connected to the inner wall of the square-shaped frame.

22. The battery device according to claim 20, characterized in that The U-shaped frame includes a first frame body, a second frame body, a third frame body and a fourth frame body connected in sequence, the first frame body and the third frame body are arranged at intervals in the second direction, the second frame body and the fourth frame body are arranged at intervals in the third direction, and the first direction, the second direction and the third direction intersect each other; Among them, along the second direction, the first frame has a first width, the third frame has a third width, along the third direction, the second frame has a second width, the fourth frame has a fourth width, and at least two of the first width, the second width, the third width and the fourth width are equal.

23. The battery device according to claim 22, characterized in that: The first width, the second width, the third width, and the fourth width are all equal to a first preset value, and the first preset value is greater than or equal to 5 mm and less than or equal to 30 mm.

24. The battery device according to claim 23, characterized in that The first preset value is greater than or equal to 10 mm and less than or equal to 20 mm.

25. The battery device according to claim 22, characterized in that Along the first direction, the first frame has a first thickness, the second frame has a second thickness, the third frame has a third thickness, and the fourth frame has a fourth thickness, and at least two of the first thickness, the second thickness, the third thickness and the fourth thickness are equal.

26. The battery device according to claim 25, characterized in that The first thickness, the second thickness, the third thickness and the fourth thickness are all equal to a second preset value, and the second preset value is greater than the first preset size and is greater than or equal to 3 mm.

27. The battery device according to claim 22, characterized in that Along the third direction, a minimum distance between the second frame and an edge of the battery cell is a first distance, and the first distance is greater than or equal to 0 mm and less than or equal to 10 mm.

28. The battery device according to claim 27, characterized in that The first distance is greater than or equal to 0 mm and less than or equal to 5 mm.

29. The battery device according to claim 22, characterized in that Along the third direction, a minimum distance between the fourth frame and the edge of the battery cell is a second distance, and the second distance is greater than or equal to 0 mm and less than or equal to 10 mm.

30. The battery device according to claim 29, characterized in that The second distance is greater than or equal to 0 mm and less than or equal to 5 mm.

31. The battery device according to any one of claims 1 to 30, characterized in that: The heat exchange element comprises a first heat exchange element and a second heat exchange element. Along the second direction, the first heat exchange element and the second heat exchange element are respectively arranged on opposite sides of the heat insulation element.

32. An electrical equipment, characterized in that: The electric device comprises the battery device according to claim 31.

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