Batteries and electrical equipment

Abstract

The present application provides a battery and an electrical device, wherein the battery comprises a battery cell, a housing and a heat insulating member, wherein the housing is used to accommodate the battery cell, the heat insulating member has a heat insulating cavity, and the heat insulating member is arranged between the battery cell and the housing to block at least part of the heat conduction path between the battery cell and the housing. The battery provided by the present application effectively improves the situation in which the battery cell exchanges heat with the external environment of the battery through the housing, thereby effectively improving the temperature control effect of the thermal management module on the battery cell, and effectively improving the working performance of the battery.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] The battery usually includes a box and a battery cell, and the battery cell is contained in the box. In the related art, in order to maintain the temperature of the battery cell within an appropriate range, a thermal management module is required to regulate the temperature of the battery cell. However, since the box is usually made of metal materials, the battery cell is prone to heat exchange with the external environment of the battery through the box, which makes the thermal management module's temperature regulation effect on the battery cell worse, which is not conducive to improving the working performance of the battery. Utility Model Content

[0004] One of the purposes of the embodiments of the present application is to provide a battery and an electrical device, aiming to solve the technical problem in the related art that the battery cells are prone to heat exchange with the external environment of the battery through the box.

[0005] In order to solve the above technical problems, the technical solution adopted in the embodiment of the present application is: a battery is provided, comprising:

[0006] Battery cells;

[0007] A box body, used for accommodating battery cells;

[0008] The heat insulating member has a heat insulating cavity and is arranged between the battery cell and the box body to block at least part of the heat conduction path between the battery cell and the box body.

[0009] The beneficial effect of the battery provided by the embodiment of the present application is that: the battery provided by the embodiment of the present application arranges a thermal insulation member between the battery cell and the casing, and the thermal insulation member has an insulation cavity, so that the thermal insulation member can block at least part of the heat conduction path between the battery cell and the casing, thereby effectively improving the heat exchange between the battery cell and the external environment of the battery through the casing, thereby effectively improving the temperature control effect of the thermal management module on the battery cell, and effectively improving the working performance of the battery.

[0010] In some embodiments of the present application, the thermal insulation member includes a first plate and a second plate. The first plate is arranged opposite to the battery cell, and the second plate is arranged on the side of the first plate facing away from the battery cell and is spaced from the first plate to form an insulation cavity.

[0011] By adopting the above technical solution, the insulation cavity can effectively prevent heat from being transferred from the first plate to the second plate, which not only effectively improves the insulation performance of the insulation component, but also effectively reduces the weight of the insulation component, thereby effectively improving the mass energy density of the battery.

[0012] In some embodiments of the present application, the thermal insulation component further includes reinforcing ribs connected between the first plate body and the second plate body.

[0013] By adopting the above technical solution, the structural strength of the thermal insulation component is effectively improved, thereby effectively improving the compressive performance of the thermal insulation component.

[0014] In some embodiments of the present application, the reinforcing ribs are perpendicular to the first plate body and the second plate body.

[0015] By adopting the above technical solution, the reinforcing ribs can effectively support the first plate body and the second plate body, thereby further improving the compressive performance of the thermal insulation component.

[0016] In some embodiments of the present application, the reinforcing ribs are bent along a first direction, and the first direction is parallel to the thickness direction of the thermal insulation component.

[0017] By adopting the above technical solution, when the thermal insulation piece is subjected to external force along the first direction, the reinforcing ribs are easily deformed along the first direction to absorb the external force, thereby effectively reducing the risk of the thermal insulation piece being crushed.

[0018] In some embodiments of the present application, the reinforcing rib includes a first connecting section connected to the first plate body, a second connecting section connected to the second plate body, and a third connecting section connected between the first connecting section and the second connecting section, the first connecting section is inclined relative to the first plate body, and the second connecting section is inclined relative to the second plate body.

[0019] By adopting the above technical solution, the reinforcing ribs can be deformed to absorb the external force when the thermal insulation component is subjected to an external force along the first direction.

[0020] In some embodiments of the present application, at least a portion of the third connecting segment is in an arc-shaped structure along the first direction.

[0021] By adopting the above technical solution, the stress to which the reinforcing rib is subjected when it is deformed is effectively reduced, thereby effectively reducing the risk of the reinforcing rib breaking.

[0022] In some embodiments of the present application, the number of the reinforcing ribs is at least two, and the at least two reinforcing ribs are arranged at intervals along the second direction, and the second direction is perpendicular to the thickness direction of the thermal insulation component.

[0023] By adopting the above technical solution, the compressive performance of the thermal insulation component is further improved.

[0024] In some embodiments of the present application, at least two reinforcing ribs are arranged opposite to each other along the second direction.

[0025] By adopting the above technical solution, at least part of the forces acting on the two reinforcing ribs arranged opposite to each other can offset each other, thereby further improving the compressive performance of the thermal insulation component.

[0026] In some embodiments of the present application, at least two reinforcing ribs are divided into at least two reinforcing rib groups, and the reinforcing ribs of two adjacent reinforcing rib groups are arranged opposite to each other along the second direction.

[0027] By adopting the above technical solution, at least part of the forces acting on two adjacent reinforcing rib groups can be offset against each other, thereby further improving the compressive performance of the thermal insulation component.

[0028] In some embodiments of the present application, the number of reinforcing ribs in each reinforcing rib group is equal.

[0029] By adopting the above technical solution, the overall force on the thermal insulation component can be made more uniform, thereby further improving the compressive performance of the thermal insulation component.

[0030] In some embodiments of the present application, the battery cell and the box body cooperate to clamp the thermal insulation member.

[0031] By adopting the above technical solution, the heat insulating component can be effectively fixed between the battery cell and the box body.

[0032] In some embodiments of the present application, the battery further includes a heat exchange component thermally connected to the battery cell, and the heat exchange component is disposed between the battery cell and the heat insulating component.

[0033] By adopting the above technical solution, the temperature of the battery cell is effectively regulated, and the heat transfer from the heat exchange component to the box is effectively improved, thereby effectively improving the temperature regulation effect of the heat exchange component on the battery cell and effectively improving the working performance of the battery.

[0034] In some embodiments of the present application, the battery cell cooperates with the box body to clamp the heat insulating component and the heat exchange component.

[0035] By adopting the above technical solution, the heat insulating component and the heat exchange component are effectively fixed between the battery cell and the box body.

[0036] In some embodiments of the present application, the box body includes a pallet, a frame and two expansion beams. The frame is used to define a accommodating space. The pallet cover is arranged on the open side of the frame to close the accommodating space. The battery cell is accommodated in the accommodating space. The frame includes two first side beams arranged relatively spaced apart. The two expansion beams are connected between the two first side beams and cooperate to clamp the battery cell.

[0037] By adopting the above technical solution, the battery cells can be effectively protected.

[0038] In some embodiments of the present application, the heat insulation member is disposed between the battery cell and the expansion beam; or, the heat insulation member is disposed between the battery cell and the first side beam; or, the heat insulation member is disposed between the battery cell and the support plate.

[0039] By adopting the above technical solution, the heat exchange between the battery cell and the external environment of the battery through the box is effectively improved, thereby effectively improving the temperature control effect of the thermal management module on the battery cell and effectively improving the working performance of the battery.

[0040] In some embodiments of the present application, there are multiple thermal insulation members, at least one thermal insulation member is arranged between the battery cell and the expansion beam, at least another thermal insulation member is arranged between the battery cell and the first side beam, and at least another thermal insulation member is arranged between the battery cell and the support plate.

[0041] By adopting the above technical solution, the heat exchange between the battery cell and the external environment of the battery through the box is further improved, thereby further improving the temperature control effect of the thermal management module on the battery cell and further improving the working performance of the battery.

[0042] In some embodiments of the present application, the thermal insulation element is an integrally formed component.

[0043] By adopting the above technical solution, the manufacturing process of the thermal insulation component is effectively simplified, thereby reducing the manufacturing cost of the thermal insulation component.

[0044] An embodiment of the present application also provides an electrical device, comprising the battery described in any of the above embodiments.

[0045] The beneficial effect of the electric device provided by the embodiments of the present application is that the electric device provided by the embodiments of the present application effectively improves the working performance of the electric device because it adopts the battery described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0048] Figure 2 for Figure 1A schematic diagram of an exploded structure of a battery in a vehicle shown;

[0049] Figure 3 for Figure 1 A schematic diagram of the top view of the battery in the vehicle shown;

[0050] Figure 4 for Figure 3 The schematic diagram of the cross-sectional structure of the battery shown along the AA line;

[0051] Figure 5 for Figure 4 The enlarged structural diagram of the battery at position B is shown;

[0052] Figure 6 A schematic diagram of the structure of a heat insulation member provided in one embodiment of the present application;

[0053] Figure 7 for Figure 6 The schematic diagram of the main structure of the thermal insulation member shown;

[0054] Figure 8 A schematic structural diagram of a heat insulating member provided in another embodiment of the present application;

[0055] Fig. 9 for Figure 8 An enlarged structural diagram of location C of the thermal insulation component is shown.

[0056] Description of reference numerals:

[0057] 1000. Vehicles;

[0058] 100, battery; 10, box; 11, first part; 111, frame; 1111, first side beam; 1112, second side beam; 112, expansion beam; 113, support plate; 12, second part; 13, accommodating space; 20, battery cell; 30, thermal insulation; 31, first plate; 32, second plate; 33, thermal insulation cavity; 34, reinforcing rib; 341, first connecting section; 342, second connecting section; 343, third connecting section; 35, reinforcing rib group; 36, first thermal insulation surface; 37, second thermal insulation surface; 40, heat exchanger;

[0059] 200, controller;

[0060] 300. Motor. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0062] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0063] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application shown in the drawings are only exemplary and should not constitute any limitation to the present application.

[0064] A battery is a device for storing electrical energy. A battery usually includes a housing and a battery cell. The housing is used to hold the battery cell, and the battery cell is the smallest electrical energy storage unit. The temperature of the battery cell is an important factor affecting the performance of the battery. For example, when the temperature of the battery cell is too high, the battery cell is prone to thermal runaway, which is not conducive to improving the safety performance of the battery. For another example, when the temperature of the battery cell is too low, the capacity of the battery cell will decrease, which is not conducive to improving the working performance of the battery. For this reason, a thermal management module is needed to regulate the temperature of the battery cell to keep the temperature of the battery cell within a reasonable range.

[0065] In the related art, the casing is usually made of metal. Since metal has a high thermal conductivity, the battery cells can easily exchange heat with the external environment of the battery through the casing. For example, when the battery cells need to be dissipated, the heat can easily be transferred from the external environment of the battery to the battery cells through the casing. For another example, when the battery cells need to be heated, the heat of the battery cells can easily be transferred to the external environment of the battery through the casing, resulting in a poor temperature control effect of the thermal management module on the battery cells, which is not conducive to improving the performance of the battery.

[0066] In order to improve the situation of heat exchange between the battery cells and the external environment of the battery through the casing, the battery provided in the embodiment of the present application is provided with a heat insulating member between the battery cells and the casing, and the heat insulating member has a heat insulating cavity so that the heat insulating member can block at least part of the heat conduction path between the battery cells and the casing, thereby effectively improving the situation of heat exchange between the battery cells and the external environment of the battery through the casing, thereby effectively improving the temperature control effect of the thermal management module on the battery cells, and effectively improving the working performance of the battery.

[0067] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical equipment using batteries. Among them, electrical equipment can be but is not limited to vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Electric toys include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0068] See also Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0069] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0070] The battery 100 provided in the embodiment of the present application is described below with reference to the accompanying drawings.

[0071] First, please also refer to Figures 2 to 5The embodiment of the present application provides a battery 100, including a battery cell 20, a case 10 and a thermal insulation member 30, the case 10 is used to accommodate the battery cell 20, the thermal insulation member 30 has a thermal insulation cavity 33, and the thermal insulation member 30 is arranged between the battery cell 20 and the case 10 to block at least part of the heat conduction path between the battery cell 20 and the case 10.

[0072] It should be noted that the battery 100 has a height direction, a length direction and a width direction. Figure 2 , Figure 4 and Figure 5 The Z direction shown, the width direction of the battery 100 can be referred to Figure 2 and Figure 3 The Y direction shown in FIG. 1 is the length direction of the battery 100. Figures 2 to 5 The box body 10 defines the shape of the battery 100 , in other words, the height direction of the battery 100 is the height direction of the box body 10 , the width direction of the battery 100 is the width direction of the box body 10 , and the length direction of the battery 100 is the length direction of the box body 10 .

[0073] The box 10 is used to provide a storage space 13 for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space 13 for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 is covered on the open side of the second part 12, so that the first part 11 and the second part 12 jointly define the storage space 13; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 is covered on the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc. The material of the box 10 may be, but is not limited to, aluminum, aluminum alloy, stainless steel, titanium alloy, etc.

[0074] In some embodiments, see Figure 2The box body 10 may include a support plate 113, a frame body 111 and two expansion beams 112, and the frame body 111, the support plate 113 and the two expansion beams 112 may together constitute the above-mentioned first part 11. The frame body 111 may include two first side beams 1111 and two second side beams 1112, wherein the first side beams 1111 may extend along the length direction of the battery 100, and the second side beams 1112 may extend along the width direction of the battery 100. The two second side beams 1112 are connected between the two first side beams 1111 and are spaced apart along the length direction of the first side beams 1111 to define the above-mentioned accommodation space 13. The support plate 113 is covered on one opening side of the frame body 111, and the second part 12 is covered on the other opening side of the frame body 111 to close the above-mentioned accommodation space 13. Two expansion beams 112 are arranged in the above-mentioned accommodating space 13. The two expansion beams 112 are connected between the two first side beams 1111 and are arranged at intervals along the length direction of the first side beams 1111. The battery cell 20 is arranged between the two expansion beams 112 to limit the expansion amount of the battery cell 20.

[0075] In some embodiments, the box 10 can be used as a part of the chassis structure of the vehicle 1000. For example, part of the box 10 can become at least a part of the floor of the vehicle 1000, or part of the box 10 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0076] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a converging component for realizing electrical connection between the multiple battery cells 20.

[0077] Each battery cell 20 may be a secondary battery or a primary battery, wherein a secondary battery refers to a battery cell 20 that can be used continuously by activating the active material by charging after the battery cell 20 is discharged, and a primary battery refers to a battery cell 20 that cannot be used continuously by activating the active material by charging after the power of the battery cell 20 is exhausted; the battery cell 20 may also 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., but is not limited thereto. The battery cell 20 may be a cylindrical battery cell, a prismatic battery cell, a soft pack battery cell, or a battery cell of other shapes, wherein the prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, and a multi-prismatic battery cell, wherein the multi-prismatic battery cell is, for example, a hexagonal battery cell, etc., and the present application has no particular restrictions.

[0078] The battery cell 20 may include a housing, an electrode assembly, an electrolyte and other components. The housing is used to accommodate the electrode assembly and the electrolyte and other components to isolate the electrode assembly and the electrolyte and other components from the external environment of the battery cell 20 .

[0079] The electrode assembly is a component in the battery cell 20 where an electrochemical reaction occurs. The battery cell 20 may include one or more electrode assemblies. The main body of the electrode assembly is made of a positive electrode sheet, a negative electrode sheet and a separator using a winding process or a stacking process. A plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and a plurality of positive electrode sheets and a plurality of negative electrode sheets are alternately stacked. The separator is provided between adjacent positive electrode sheets and negative electrode sheets to insulate and separate the positive electrode sheets and the negative electrode sheets. In some embodiments, a plurality of positive electrode sheets may be provided, and the negative electrode sheets are folded to form a plurality of stacked folded sections, and a positive electrode sheet is clamped between adjacent folded sections. In other embodiments, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded sections. In some embodiments, a plurality of separators may be provided, and they are respectively provided between any adjacent positive electrode sheets or negative electrode sheets. In other embodiments, the separator may be provided continuously and provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding. The shape of the electrode assembly may be, but is not limited to, cylindrical, flat or multi-prism-shaped. In some embodiments, the electrode assembly further includes tabs, which include a positive tab and a negative tab, wherein the positive tab is connected to the positive electrode sheet and the negative tab is connected to the negative electrode sheet to extract current from the electrode assembly or input current into the electrode assembly.

[0080] During the charge and discharge process of the battery cell 20, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator is arranged between the positive and negative electrodes to prevent the positive and negative electrodes from short-circuiting and allow the active ions to pass through.

[0081] The electrolyte plays the role of conducting ions between the positive electrode and the negative electrode. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. In some embodiments, the electrolyte can be a liquid electrolyte. Of course, in other embodiments, the electrolyte can also be a gel electrolyte, a solid electrolyte, etc.

[0082] In some embodiments, the battery cell 20 also includes an electrode terminal, which is a component electrically connected to the electrode assembly for outputting or inputting electrical energy. The electrode terminal can be arranged in the electrode lead-out hole of the shell, a part of the electrode terminal is arranged in the internal environment of the battery cell 20 and is directly or indirectly connected to the pole ear of the electrode assembly, and the other part of the electrode terminal is arranged in the external environment of the battery cell 20 and is connected to the busbar, sampling device and other components. The number of electrode terminals can be two, one electrode terminal is connected to the positive pole ear, and the other electrode terminal is connected to the negative pole ear. Optionally, the electrode terminal can be a columnar structure, such as a cylindrical structure, a prismatic structure, etc., and the electrode terminal can also be a plate-like structure, such as a circular plate, a square plate, etc. Of course, in other embodiments, the electrode terminal can also be other irregular three-dimensional structures. The electrode terminal can be made of one metal material or a plurality of metal materials. The metal material can be but is not limited to copper, aluminum, nickel, zinc, iron, etc.

[0083] In some embodiments, the battery cell 20 further includes a pressure relief mechanism, which is a mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The pressure relief mechanism may be mounted on the housing and may be disposed between two electrode terminals.

[0084] The heat insulator 30 is a component for blocking at least part of the heat conduction path between the battery cell 20 and the box 10. In some embodiments, the heat insulator 30 is made of a heat insulating material, which may be, but is not limited to, polyurethane, polystyrene resin, phenolic foam, glass wool, and the like.

[0085] The number of the thermal insulation 30 may be one or more. When the number of the thermal insulation 30 is one, the thermal insulation 30 may be disposed between the battery cell 20 and any portion of the box 10 directly opposite to the battery cell 20. In some embodiments, the thermal insulation 30 is disposed between the battery cell 20 and the above-mentioned expansion beam 112 to block the heat conduction path between the battery cell 20 and the above-mentioned expansion beam 112. In other embodiments, the thermal insulation 30 is disposed between the battery cell 20 and the above-mentioned first side beam 1111 to block the heat conduction path between the battery cell 20 and the above-mentioned first side beam 1111. In yet other embodiments, the thermal insulation 30 is disposed between the battery cell 20 and the above-mentioned support plate 113 to block the heat conduction path between the battery cell 20 and the above-mentioned support plate 113.

[0086] In the case where there are multiple heat insulating members 30, in order to more effectively block the heat conduction path between the battery cell 20 and the box body 10, multiple heat insulating members 30 can be disposed at multiple locations of the box body 10 on the side facing the battery cell 20. In some embodiments, at least one heat insulating member 30 is disposed between the battery cell 20 and the expansion beam 112, at least another heat insulating member 30 is disposed between the battery cell 20 and the first side beam 1111, and at least another heat insulating member 30 is disposed between the battery cell 20 and the support plate 113, so as to block the heat conduction path between the battery cell 20 and the expansion beam 112, the heat conduction path between the battery cell 20 and the first side beam 1111, and the heat conduction path between the battery cell 20 and the support plate 113.

[0087] The heat insulating member 30 may be a plate-shaped structure. In some embodiments, the heat insulating member 30 has a first heat insulating surface 36 and a second heat insulating surface 37, the first heat insulating surface 36 and the second heat insulating surface 37 are arranged opposite to each other, and the battery cell 20 is arranged opposite to the first heat insulating surface 36, that is, the first heat insulating surface 36 covers at least part of the battery cell 20, and at least part of the box 10 is arranged opposite to the second heat insulating surface 37. In order to more effectively block the heat conduction path between the battery cell 20 and the box 10, the first heat insulating surface 36 may cover the entire battery cell 20, that is, the projection of the battery cell 20 in the direction from the battery cell 20 to the heat insulating member 30 is entirely on the first heat insulating surface 36.

[0088] The heat insulation cavity 33 is formed inside the heat insulation member 30, and the heat insulation cavity 33 can be a vacuum cavity or a non-vacuum cavity. In practical applications, the heat transfer path between the battery cell 20 and the box body 10 passes through the first heat insulation surface 36, the heat insulation cavity 33 and the second heat insulation surface 37 in sequence, or passes through the second heat insulation surface 37, the heat insulation cavity 33 and the first heat insulation surface 36 in sequence.

[0089] The battery 100 provided in the embodiment of the present application is provided with a heat insulating member 30 between the battery cell 20 and the case 10. The heat insulating member 30 has a heat insulating cavity 33, so that the heat insulating member 30 can block at least part of the heat conduction path between the battery cell 20 and the case 10, thereby effectively improving the heat exchange between the battery cell 20 and the external environment of the battery 100 through the case 10, thereby effectively improving the temperature control effect of the thermal management module on the battery cell 20, and effectively improving the working performance of the battery 100.

[0090] In some embodiments of this application, please refer to Figures 6 to 9 The heat insulating member 30 includes a first plate 31 and a second plate 32 . The first plate 31 is arranged opposite to the battery cell 20 . The second plate 32 is arranged on a side of the first plate 31 facing away from the battery cell 20 and is spaced apart from the first plate 31 to form a heat insulating cavity 33 .

[0091] The first plate 31 and the second plate 32 together constitute the main part of the heat insulating member 30. In other words, in this embodiment, the heat insulating member 30 is a hollow plate-shaped structure. Along the thickness direction of the heat insulating member 30, the first plate 31 and the second plate 32 are spaced apart to form the above-mentioned heat insulating cavity 33. In some embodiments, the first plate 31 and the second plate 32 are parallel to each other, and the thickness direction of the heat insulating member 30 can be a direction perpendicular to the first plate 31 and the second plate 32. It should be noted that, in the case where the heat insulating member 30 is disposed between the battery cell 20 and the above-mentioned expansion beam 112, the thickness direction of the heat insulating member 30 can be the length direction of the battery 100, in the case where the heat insulating member 30 is disposed between the battery cell 20 and the above-mentioned first side beam 1111, the thickness direction of the heat insulating member 30 can be the width direction of the battery 100, and in the case where the heat insulating member 30 is disposed between the battery cell 20 and the above-mentioned support plate 113, the thickness direction of the heat insulating member 30 can be the height direction of the battery 100.

[0092] When the thermal insulation member 30 has a first thermal insulation surface 36 and a second thermal insulation surface 37 , the surface of the first plate 31 facing the battery cell 20 may constitute the first thermal insulation surface 36 , and the surface of the second plate 32 facing away from the first plate 31 may constitute the second thermal insulation surface 37 .

[0093] By adopting the above technical solution, the insulation cavity 33 can effectively prevent heat from being transferred from the first plate body 31 to the second plate body 32, which not only effectively improves the insulation performance of the insulation component 30, but also effectively reduces the weight of the insulation component 30, thereby effectively improving the mass energy density of the battery 100.

[0094] In some embodiments of this application, please refer to Figures 6 to 9 The thermal insulation member 30 further includes a reinforcing rib 34 , which is connected between the first plate body 31 and the second plate body 32 .

[0095] The reinforcing ribs 34 are used to support the first plate body 31 and the second plate body 32 to increase the structural strength of the heat insulating member 30. It can be understood that the reinforcing ribs 34 are connected between the first plate body 31 and the second plate body 32, and the reinforcing ribs 34 can extend straightly in any direction perpendicular to the thickness direction of the heat insulating member 30, or can be bent and extended in any direction perpendicular to the thickness direction of the heat insulating member 30.

[0096] In some embodiments, in order to further increase the structural strength of the thermal insulation member 30, the thermal insulation member 30 may be made of a rigid thermal insulation material, such as polyurethane, polystyrene resin, etc.

[0097] In some embodiments, in order to simplify the manufacturing process of the thermal insulation member 30 and reduce the manufacturing cost of the thermal insulation member 30, the first plate body 31, the second plate body 32 and the reinforcing ribs 34 can be an integrally molded component. For example, the first plate body 31, the second plate body 32 and the reinforcing ribs 34 are integrally molded using an injection molding process.

[0098] In other embodiments, the first plate body 31 , the second plate body 32 and the reinforcing rib 34 may be separately formed and then connected into a whole. For example, the reinforcing rib 34 is bonded between the first plate body 31 and the second plate body 32 .

[0099] The number of reinforcing ribs 34 may be one or more. In some embodiments, in order to further improve the structural strength of the thermal insulation member 30, the number of reinforcing ribs 34 is more than one, and the plurality of reinforcing ribs 34 may be arranged at intervals in the same direction perpendicular to the thickness direction of the thermal insulation member 30, or a portion of the reinforcing ribs 34 may be arranged at intervals in one direction perpendicular to the thickness direction of the thermal insulation member 30, and another portion of the reinforcing ribs 34 may be arranged at intervals in another direction perpendicular to the thickness direction of the thermal insulation member 30, that is, the two portions of the reinforcing ribs 34 are arranged at an angle to each other.

[0100] By adopting the above technical solution, the structural strength of the thermal insulation member 30 is effectively improved, thereby effectively improving the compression resistance of the thermal insulation member 30.

[0101] In some embodiments of this application, please refer to Figure 7 The reinforcing ribs 34 are perpendicular to the first plate body 31 and the second plate body 32 .

[0102] In other words, in this embodiment, the first plate body 31 and the second plate body 32 are parallel to each other, and in the thickness direction of the thermal insulation member 30, the reinforcing rib 34 is a linear structure, and the reinforcing rib 34 is connected between the first plate body 31 and the second plate body 32 along the thickness direction of the thermal insulation member 30.

[0103] By adopting the above technical solution, the reinforcing ribs 34 can effectively support the first plate body 31 and the second plate body 32 , thereby further improving the compressive performance of the thermal insulation member 30 .

[0104] In some embodiments of this application, please refer to Figure 8 and Fig. 9 The reinforcing ribs 34 are bent along a first direction, and the first direction is parallel to the thickness direction of the thermal insulation member 30 .

[0105] The first direction is the thickness direction of the heat insulating member 30. One end of the reinforcing rib 34 along the thickness direction of the heat insulating member 30 is connected to the first plate 31, and the other end of the reinforcing rib 34 along the thickness direction of the heat insulating member 30 is connected to the second plate 32. The reinforcing rib 34 is bent along the first direction, which means that the reinforcing rib 34 is in a bent structure in the thickness direction of the heat insulating member 30, that is, in the thickness direction of the heat insulating member 30, at least one part of the reinforcing rib 34 is not parallel to at least another part, and the bent structure may be, but is not limited to, an arc structure, an angle structure, etc.

[0106] By adopting the above technical solution, when the thermal insulation member 30 is subjected to an external force along a first direction, the reinforcing ribs 34 are easily deformed along the first direction to absorb the external force, thereby effectively reducing the risk of the thermal insulation member 30 being crushed.

[0107] In some embodiments of this application, please refer to Fig. 9 The reinforcing rib 34 includes a first connecting section 341 connected to the first plate body 31, a second connecting section 342 connected to the second plate body 32, and a third connecting section 343 connected between the first connecting section 341 and the second connecting section 342. The first connecting section 341 is inclined relative to the first plate body 31, and the second connecting section 342 is inclined relative to the second plate body 32.

[0108] The first connecting section 341 is a part of the reinforcing rib 34 used to connect the first plate body 31, the second connecting section 342 is a part of the reinforcing rib 34 used to connect the second plate body 32, and the third connecting section 343 is a part of the reinforcing rib 34 used to connect the first connecting section 341 and the second connecting section 342. The first connecting section 341 is tilted relative to the first plate body 31, which means that the first connecting section 341 and the first plate body 31 are arranged at an angle to each other, but the first connecting section 341 is not perpendicular to the first plate body 31, and the angle α formed by the first connecting section 341 and the first plate body 31 can be determined according to actual application needs, and can be specifically 30°, 45°, 60°, etc. The second connecting section 342 is inclined relative to the second plate body 32, which means that the second connecting section 342 and the second plate body 32 are arranged at an angle to each other, but the second connecting section 342 is not perpendicular to the second plate body 32. The angle β between the second connecting section 342 and the second plate body 32 can be determined according to actual application requirements, and can be specifically 30°, 45°, 60°, etc.

[0109] The first connecting section 341 and the second connecting section 342 may be arranged at an angle to each other or may be arranged parallel to each other. In some embodiments, the first connecting section 341 and the second connecting section 342 are arranged at an angle to each other, and an end of the first connecting section 341 away from the first plate body 31 and an end of the second connecting section 342 away from the second plate body 32 extend obliquely toward the same side of the thermal insulation member 30, and the third connecting section 343 is connected between an end of the first connecting section 341 away from the first plate body 31 and an end of the second connecting section 342 away from the second plate body 32.

[0110] By adopting the above technical solution, the reinforcing ribs 34 can be deformed to absorb the external force when the thermal insulation member 30 is subjected to an external force along the first direction.

[0111] In some embodiments of this application, please refer to Fig. 9 , at least a portion of the third connecting segment 343 is in an arc-shaped structure along the first direction.

[0112] In some embodiments, the first connecting section 341 and the second connecting section 342 are arranged at an angle to each other, and one end of the first connecting section 341 away from the first plate body 31 and one end of the second connecting section 342 away from the second plate body 32 extend obliquely toward the same side of the thermal insulation member 30, and the third connecting section 343 has an arc-shaped structure along the first direction and is connected between one end of the first connecting section 341 away from the first plate body 31 and one end of the second connecting section 342 away from the second plate body 32.

[0113] When the heat insulating member 30 is subjected to an external force along the first direction, the third connecting segment 343 is compressed and the curvature is reduced, and the distance between the first connecting segment 341 and the second connecting segment 342 along the first direction is reduced accordingly to absorb the external force.

[0114] By adopting the above technical solution, the stress to which the reinforcing rib 34 is subjected when it is deformed is effectively reduced, thereby effectively reducing the risk of the reinforcing rib 34 breaking.

[0115] In some embodiments of this application, please refer to Figure 8 and Fig. 9 The number of the reinforcing ribs 34 is at least two, and at least two reinforcing ribs 34 are arranged at intervals along the second direction, and the second direction is perpendicular to the thickness direction of the thermal insulation member 30 .

[0116] At least two reinforcing ribs 34 are arranged at intervals along the second direction, which means that there is a distance between at least two reinforcing ribs 34 in the second direction.

[0117] The second direction refers to any direction perpendicular to the thickness direction of the heat insulating member 30. For example, when the heat insulating member 30 is disposed between the battery cell 20 and the above-mentioned expansion beam 112, the second direction may be the width direction of the battery 100 or the height direction of the battery 100. For another example, when the heat insulating member 30 is disposed between the battery cell 20 and the above-mentioned first side beam 1111, the second direction may be the length direction of the battery 100 or the height direction of the battery 100. For another example, when the heat insulating member 30 is disposed between the battery cell 20 and the above-mentioned support plate 113, the second direction may be the length direction of the battery 100 or the width direction of the battery 100. The parallel arrangement of multiple reinforcing ribs 34 along the second direction means that the multiple reinforcing ribs 34 are parallel to each other and arranged in sequence along the second direction. It can be understood that two adjacent reinforcing ribs 34 are arranged at intervals from each other along the second direction.

[0118] By adopting the above technical solution, the compressive performance of the thermal insulation component 30 is further improved.

[0119] In some embodiments of this application, please refer to Figure 8 and Fig. 9 , at least two reinforcing ribs 34 are arranged opposite to each other along the second direction.

[0120] At least two reinforcing ribs 34 are arranged opposite to each other along the second direction, which means that at least two reinforcing ribs 34 are oriented in opposite directions in the second direction. For example, when the reinforcing rib 34 includes a first connecting segment 341, a second connecting segment 342, and a third connecting segment 343, and the third connecting segment 343 is in an arc-shaped structure, the arc opening direction of the third connecting segment 343 of one reinforcing rib 34 is opposite to the arc opening direction of the third connecting segment 343 of another reinforcing rib 34.

[0121] When the thermal insulation member 30 is subjected to external force along its thickness direction, the reinforcing ribs 34 are subjected to force and undergo compression deformation. At this time, the external force will generate a component force along the second direction. Since at least two reinforcing ribs 34 are arranged opposite to each other along the second direction, the component forces along the second direction received by the two reinforcing ribs 34 are directed in opposite directions, thereby canceling each other out.

[0122] By adopting the above technical solution, at least part of the forces acting on the two reinforcing ribs 34 arranged opposite to each other can offset each other, thereby further improving the compressive performance of the thermal insulation component 30.

[0123] In some embodiments of this application, please refer to Figure 8 and Fig. 9 At least two reinforcing ribs 34 are divided into at least two reinforcing rib groups 35, and the reinforcing ribs 34 of two adjacent reinforcing rib groups 35 are arranged opposite to each other along the second direction.

[0124] The reinforcing rib group 35 includes at least one reinforcing rib 34. The number of reinforcing ribs 34 in the reinforcing rib group 35 can be determined according to actual application requirements, and can be 1, 2, 3, 4, etc. In the case where the reinforcing rib group 35 includes multiple reinforcing ribs 34, the directions of the reinforcing ribs 34 in the reinforcing rib group 35 in the second direction are the same. The reinforcing ribs 34 of two adjacent reinforcing rib groups 35 are arranged opposite to each other along the second direction, which means that in the two adjacent reinforcing rib groups 35, the direction of the reinforcing ribs 34 in one reinforcing rib group 35 in the second direction is opposite to the direction of the reinforcing ribs 34 in the other reinforcing rib group 35 in the second direction. For example, in the case where the reinforcing rib 34 includes a first connecting segment 341, a second connecting segment 342 and a third connecting segment 343, and the third connecting segment 343 is an arc-shaped structure, the arc opening direction of the third connecting segment 343 of the reinforcing rib 34 in one reinforcing rib group 35 is opposite to the arc opening direction of the third connecting segment 343 of the reinforcing rib 34 in the other reinforcing rib group 35.

[0125] When the thermal insulation member 30 is subjected to external force along its thickness direction, the reinforcing ribs 34 are subjected to force and undergo compression deformation. At this time, the external force will generate a component force along the second direction. Since the reinforcing ribs 34 of two adjacent reinforcing rib groups 35 are arranged opposite to each other along the second direction, the component forces along the second direction received by the reinforcing ribs 34 of the two adjacent reinforcing rib groups 35 are in opposite directions, thereby canceling each other out.

[0126] By adopting the above technical solution, at least part of the forces acting on two adjacent reinforcing rib groups 35 can offset each other, thereby further improving the compressive performance of the thermal insulation component 30.

[0127] In some embodiments of this application, please refer to Figure 8 and Fig. 9 , the number of reinforcing ribs 34 in each reinforcing rib group 35 is equal.

[0128] The number of reinforcing rib groups 35 and the number of reinforcing ribs 34 in each reinforcing rib group 35 can be determined according to actual application requirements. In some embodiments, the number of reinforcing rib groups 35 is 4, the number of reinforcing ribs 34 in each reinforcing rib group 35 is 4, and the reinforcing ribs 34 of two adjacent reinforcing rib groups 35 are arranged opposite to each other along the second direction.

[0129] Of course, in other embodiments, the number of reinforcing rib groups 35 and the number of reinforcing ribs 34 in each reinforcing rib group 35 may also be greater than four or less than four.

[0130] By adopting the above technical solution, the overall force on the thermal insulation component 30 can be made more uniform, thereby further improving the compressive performance of the thermal insulation component 30.

[0131] In some embodiments of this application, please refer to Figures 2 to 5The battery cell 20 and the box body 10 cooperate to clamp the heat insulating member 30 .

[0132] In other words, the battery cell 20 and the box 10 cooperate to apply a squeezing force to the heat insulating member 30, so that the heat insulating member 30 is fixed between the battery cell 20 and the box 10. The battery cell 20 can be in direct contact with the heat insulating member 30, or it can be in indirect contact with the heat insulating member 30, that is, the battery cell 20 applies a squeezing force to the heat insulating member 30 through other components. Similarly, the box 10 can be in direct contact with the heat insulating member 30, or it can be in indirect contact with the heat insulating member 30, that is, the box 10 applies a squeezing force to the heat insulating member 30 through other components.

[0133] By adopting the above technical solution, the heat insulating member 30 is effectively fixed between the battery cell 20 and the box body 10 .

[0134] In some embodiments of this application, please refer to Figures 2 to 5 The battery 100 further includes a heat exchanger 40 thermally connected to the battery cell 20 , and the heat exchanger 40 is disposed between the battery cell 20 and the heat insulating member 30 .

[0135] The heat exchanger 40 is a component in the thermal management module used for heat exchange of the battery cell 20. The heat exchanger 40 is thermally connected to the battery cell 20, which means that the heat exchanger 40 can be in direct contact with the battery cell 20 to absorb the heat of the battery cell 20 or transfer the heat to the battery cell 20. The heat exchanger 40 can also be in indirect contact with the battery cell 20, that is, the heat exchanger 40 absorbs the heat of the battery cell 20 or transfers the heat to the battery cell 20 through other heat-conducting components.

[0136] In some embodiments, a heat exchange channel for heat exchange medium to flow is formed inside the heat exchange element 40, and the heat of the battery cell 20 is transferred to the heat exchange medium, and the heat is taken away during the flow of the heat exchange medium to cool the battery cell 20. Alternatively, the heat is transferred to the battery cell 20 during the flow of the heat exchange medium to heat the battery cell 20.

[0137] The heat exchanger 40 is arranged between the battery cell 20 and the heat insulating member 30. It can be understood that since the heat insulating member 30 is arranged between the battery cell 20 and the box body 10, that is, the heat insulating member 30 is arranged between the heat exchanger 40 and the box body 10, the heat conduction path between the heat exchanger 40 and the box body 10 is blocked.

[0138] By adopting the above technical solution, the temperature of the battery cell 20 is effectively regulated, and the heat transfer from the heat exchange component 40 to the box body 10 is effectively improved, thereby effectively improving the temperature regulation effect of the heat exchange component 40 on the battery cell 20 and effectively improving the working performance of the battery 100.

[0139] In some embodiments of this application, please refer to Figures 2 to 5 The battery cell 20 cooperates with the box body 10 to clamp the heat insulating component 30 and the heat exchanging component 40 .

[0140] In other words, the battery cell 20 and the box 10 cooperate to apply a squeezing force to the heat insulating member 30 and the heat exchanging member 40, so that the heat insulating member 30 and the heat exchanging member 40 are fixed between the battery cell 20 and the box 10. The box 10 may be in direct contact with the heat insulating member 30, or may be in indirect contact with the heat insulating member 30, that is, the box 10 applies a squeezing force to the heat insulating member 30 through other components.

[0141] By adopting the above technical solution, the heat insulating element 30 and the heat exchanging element 40 are effectively fixed between the battery cell 20 and the box body 10 .

[0142] Second, see Figure 1 , an embodiment of the present application provides an electrical device, comprising the battery 100 described in any of the above embodiments.

[0143] The electric device provided in the embodiment of the present application adopts the battery 100 described in any of the above embodiments, thereby effectively improving the working performance of the electric device.

[0144] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A battery, characterized in that: The battery comprises: Battery cells; A box body, used to accommodate the battery cells; The heat insulating member has a heat insulating cavity and is disposed between the battery cell and the box body to block at least part of the heat conduction path between the battery cell and the box body.

2. The battery according to claim 1, characterized in that The heat insulating member includes a first plate and a second plate. The first plate is arranged opposite to the battery cell, and the second plate is arranged on a side of the first plate facing away from the battery cell and is spaced apart from the first plate to form the heat insulating cavity.

3. The battery according to claim 2, characterized in that The heat insulating member further includes a reinforcing rib connected between the first plate body and the second plate body.

4. The battery according to claim 3, characterized in that The reinforcing ribs are perpendicular to the first plate body and the second plate body.

5. The battery according to claim 3, characterized in that The reinforcing ribs are bent along a first direction, and the first direction is parallel to a thickness direction of the thermal insulation component.

6. The battery according to claim 5, characterized in that The reinforcing rib includes a first connecting section connected to the first plate body, a second connecting section connected to the second plate body, and a third connecting section connected between the first connecting section and the second connecting section. The first connecting section is inclined relative to the first plate body, and the second connecting section is inclined relative to the second plate body.

7. The battery according to claim 6, characterized in that At least a portion of the third connecting segment is in an arc-shaped structure along the first direction.

8. The battery according to claim 5, characterized in that The number of the reinforcing ribs is at least two, and at least two of the reinforcing ribs are arranged at intervals along a second direction, and the second direction is perpendicular to the thickness direction of the thermal insulation component.

9. The battery according to claim 8, characterized in that At least two of the reinforcing ribs are arranged opposite to each other along the second direction.

10. The battery according to claim 8, characterized in that At least two of the reinforcing ribs are divided into at least two reinforcing rib groups, and the reinforcing ribs of two adjacent reinforcing rib groups are arranged opposite to each other along the second direction.

11. The battery according to claim 10, characterized in that The number of the reinforcing ribs in each of the reinforcing rib groups is equal.

12. The battery according to claim 1, characterized in that The battery cell cooperates with the box body to clamp the heat insulating member.

13. The battery according to claim 1, characterized in that The battery further comprises a heat exchange member thermally connected to the battery cell, wherein the heat exchange member is disposed between the battery cell and the heat insulating member.

14. The battery according to claim 13, characterized in that The battery cell cooperates with the box body to clamp the heat insulating component and the heat exchange component.

15. The battery according to any one of claims 1 to 14, characterized in that The box body includes a support plate, a frame body and two expansion beams. The frame body is used to define a storage space. The support plate cover is arranged on the open side of the frame body to close the storage space. The battery cell is accommodated in the storage space. The frame body includes two first side beams arranged relatively spaced apart. The two expansion beams are connected between the two first side beams and cooperate to clamp the battery cell.

16. The battery according to claim 15, characterized in that The heat insulating member is disposed between the battery cell and the expansion beam; or, The heat insulating member is disposed between the battery cell and the first side beam; or, The heat insulating member is disposed between the battery cell and the support plate.

17. The battery according to claim 15, characterized in that There are multiple thermal insulation members, at least one of which is disposed between the battery cell and the expansion beam, at least another of which is disposed between the battery cell and the first side beam, and at least another of which is disposed between the battery cell and the support plate.

18. The battery according to any one of claims 1 to 14, characterized in that The heat insulating member is an integrally formed component.

19. An electrical equipment, characterized in that: The electric device comprises the battery according to any one of claims 1-18.

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