Battery device and electric device

Abstract

The application provides a battery device and a power utilization device. The battery device comprises a box assembly, a partition, a heat management assembly and a battery assembly. The battery assembly comprises a plurality of battery layers stacked along the height direction of the battery device, and the plurality of battery layers are arranged in the box assembly. The heat management assembly comprises a heat exchange element, the heat exchange element has at least one medium flow channel in the interior, the at least one medium flow channel is used for conducting a heat exchange medium, and the heat exchange medium is used for heat exchange with the plurality of battery layers. The heat exchange element is arranged between the plurality of battery layers, and a first surface of the heat exchange element is configured to carry the battery layers. The partition is arranged on the first surface and abuts between the battery layers and the first surface. An adhesive layer is arranged between the heat exchange element and the battery layers, and the partition is used for partitioning the adhesive layer. By abutting the partition between the battery layers and the first surface, the situation that the battery layers crush the medium flow channel is reduced, the reliability of the battery device is improved, and the situation that the adhesive overflows to the outside of the battery layers is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] In a new energy vehicle equipped with a battery device, the battery device can be used to provide power in whole or in part. In the related art, a single-layer battery layer arrangement is adopted, but the single-layer battery device may have the problems of low energy density and limited power, therefore, how to improve the energy density of the battery device while improving the reliability of the battery device has become an important research direction in the field. SUMMARY

[0003] Therefore, the embodiments of the present application expect to provide a battery device and a power utilization device, which can improve the energy density of the battery device while improving the reliability of the battery device.

[0004] To this end, a first aspect of the embodiments of the present application provides a battery device, comprising:

[0005] a box assembly;

[0006] a battery assembly, the battery assembly comprising a plurality of battery layers stacked along a height direction of the battery device, the plurality of battery layers being arranged in the box assembly;

[0007] a thermal management assembly, the thermal management assembly comprising a heat exchange member, the heat exchange member having at least one medium flow channel in the interior thereof, the at least one medium flow channel being used to guide a heat exchange medium, the heat exchange medium being used to exchange heat with the plurality of battery layers, the heat exchange member being arranged between the plurality of battery layers, a first surface of the heat exchange member being configured to carry the battery layers;

[0008] a barrier member, the barrier member being arranged on the first surface, the barrier member abutting between the battery layers and the first surface;

[0009] wherein a glue layer is arranged between the heat exchange member and the battery layers, and the barrier member is used to block the glue layer.

[0010] The battery device provided by the embodiment of the present application comprises a box assembly, a heat management assembly, a partition piece and a battery assembly. The battery layers are arranged in the box assembly, and the box assembly protects the battery layers. On the one hand, by arranging multiple battery layers, the capacity of the battery device can be improved. In addition, by arranging the battery layers in a stacked manner along the height direction of the battery device, the space in the box assembly can be fully utilized, and the energy density of the battery device is improved. On the other hand, by arranging the heat exchange piece between the multiple battery layers, the battery layers on the opposite sides of the heat exchange piece can be simultaneously subjected to heat exchange, which is conducive to improving the heat exchange efficiency of the heat exchange piece on the battery layers. That is, while improving the energy density of the battery device, the heat exchange efficiency can also be improved. In addition, by arranging the first surface of the heat exchange piece to bear the battery layers and arranging the partition piece to abut between the battery layers and the first surface, that is, by pressing the upper battery layer on the partition piece, the partition piece can play a supporting role, so that the pressing of the upper battery layer on the medium flow channel can be improved, and the possibility of the upper battery layer crushing the medium flow channel can be reduced. That is, while improving the energy density of the battery device, the reliability of the battery device can also be improved. In addition, the arrangement of the partition piece can also play a partitioning role on the adhesive, thereby improving the situation that the adhesive overflows to the outside of the battery layer.

[0011] In some embodiments, the heat exchange piece comprises at least two heat exchange plates, the heat exchange plates comprise a first heat exchange plate and a second heat exchange plate, a part of the first heat exchange plate protrudes to form a protruding part, the first heat exchange plate and the second heat exchange plate are arranged in a stacked manner, and the medium flow channel is defined between the protruding part and the second heat exchange plate.

[0012] In this way, the design flexibility of the heat exchange piece can be improved, the size and path of the medium flow channel can be freely designed, the heat exchange piece is suitable for complex scenes with irregular heat source distribution or limited space, and the heat exchange efficiency can be further improved. In addition, by arranging at least one heat exchange plate with a protruding part to form a medium flow channel in the protruding part, the design flexibility can be further improved.

[0013] In some embodiments, the multiple battery layers comprise a first battery layer and a second battery layer arranged adjacent to each other, and the second battery layer is located above the first battery layer.

[0014] The side of the second heat exchange plate away from the first heat exchange plate is formed with a first matching plane, the first matching plane faces the first battery layer, and the first heat exchange plate faces the second battery layer.

[0015] In this embodiment, the side of the second heat exchange plate away from the first heat exchange plate is formed with a first matching plane, and the first matching plane is used to cooperate with the first battery layer. In this way, the heat exchange piece can better cooperate with the first battery layer.

[0016] In some embodiments, the thermal management assembly further comprises a heating element, and the first matching plane is disposed between the first heating element and the first battery layer.

[0017] In this embodiment, the heating of the first battery layer and the second battery layer is realized by disposing a heating element between the first matching plane and the first battery layer. This structure is simple, low in cost, and conducive to improving the heating efficiency. In addition, by forming the first matching plane on the side of the second heat exchange plate away from the first heat exchange plate, the heating element is facilitated to be disposed, so that the heating element is better attached to the heat exchange element.

[0018] In some embodiments, each battery layer comprises a plurality of battery monomers arranged along a first direction, and the protruding portion is provided with the barrier on at least one side along a second direction, and the first direction, the second direction and the height direction of the battery device intersect.

[0019] In this embodiment, the protruding portion is provided with the barrier on at least one side along the second direction, which is conducive to the barrier effect of the adhesive, thereby further improving the overflow of the adhesive.

[0020] In some embodiments, the protruding portion is provided with the barrier on both sides along the second direction, and the two barriers are respectively supported on both ends of the battery monomer along the second direction.

[0021] That is, the two barriers are respectively located on the outer side of the protruding portion along the second direction, which is further conducive to improving the overflow of the adhesive. In addition, by supporting the two barriers on both ends of the battery monomer along the second direction, the support effect of the barrier on the battery monomer is improved, which can further reduce the possibility of the upper battery layer pressure medium flow channel, thereby further improving the reliability of the battery device.

[0022] In some embodiments, the heat exchange element comprises a first flow channel group and a second flow channel group, the first flow channel group comprises a liquid inlet and at least one medium flow channel, the second flow channel group comprises a liquid outlet and at least one medium flow channel, one end of the medium flow channel of the first flow channel group is in communication with the liquid inlet, one end of the medium flow channel of the second flow channel group is in communication with the liquid outlet, and the end of the medium flow channel of the first flow channel group away from the liquid inlet is in communication with the end of the medium flow channel of the second flow channel group away from the liquid outlet.

[0023] In this embodiment, by setting the heat exchange element to comprise a first flow channel group and a second flow channel group, the medium flow channel of the first flow channel group is in communication with the liquid inlet, and the medium flow channel of the second flow channel group is in communication with the liquid outlet. The size and path of the medium flow channel can be freely designed according to the heat distribution or space distribution of the battery monomer, which is conducive to further improving the heat exchange efficiency.

[0024] In some embodiments, each of the battery layers comprises a plurality of battery cells arranged along a first direction, the medium flow channels extend along the first direction, the first flow channel groups and the second flow channel groups are arranged along a second direction, and the first direction and the second direction intersect.

[0025] In this embodiment, by setting the arrangement direction of the battery cells and the extension direction of the medium flow channels to be the same, the uniformity of heat exchange is improved, thereby improving the temperature uniformity of the battery cells.

[0026] In some embodiments, the size of the battery cells along the height direction of the battery device and the size of the battery cells along the first direction are smaller than the size of the battery cells along the second direction, the first direction, the second direction and the height direction of the battery device intersect, and the size of the battery cells along the second direction is in the range of 300mm to 1200mm.

[0027] In this embodiment, by setting the size of the battery cells along the second direction to be in the range of 300mm to 1200mm, the capacity of the battery device and the assembly efficiency can be considered.

[0028] In some embodiments, the battery cells further comprise a pole and / or a pressure relief structure, and the pole and / or the pressure relief structure are arranged on at least one side of the battery cells along the second direction, the first direction, the second direction and the height direction of the battery device intersect.

[0029] In this embodiment, by arranging the pole and / or the pressure relief structure on at least one side of the battery cells along the second direction, on the one hand, the structural compactness of the battery device is improved, and on the other hand, the damage to the pole and / or the pressure relief structure during the stacking of the battery cells and / or the battery layers is reduced.

[0030] In some embodiments, along the second direction, the first flow channel groups are closer to the pole and / or the pressure relief structure than the second flow channel groups.

[0031] Here, the medium flow channels of the first flow channel groups are in communication with the liquid inlet, and the medium flow channels of the second flow channel groups are in communication with the liquid outlet. During heat exchange, the heat exchange medium first flows through the medium flow channels of the first flow channel groups, and then flows through the medium flow channels of the second flow channel groups. In this way, the temperature of the medium flow channels in the first flow channel groups is relatively lower than that of the medium flow channels in the second flow channel groups. The temperature of the end of the battery cell close to the pole and / or the pressure relief structure is relatively higher than that of the end away from the pole and / or the pressure relief structure. In this way, by arranging the first flow channel groups to be closer to the pole and / or the pressure relief structure than the second flow channel groups, the heat exchange efficiency is improved, and the temperature uniformity of the battery cells is improved.

[0032] The second aspect of the embodiments of the present application provides a power consuming device comprising the battery device described above.

[0033] The battery device of the power consuming device provided by the embodiments of the present application comprises a box assembly, a heat management assembly, a barrier and a battery assembly. The battery layers are arranged in the box assembly, and the box assembly protects the battery layers. By arranging the heat exchange members between the multiple battery layers, the heat exchange efficiency of the heat exchange members on the battery layers is improved. In addition, by configuring the first surface of the heat exchange member to bear the battery layers and abutting the barrier between the battery layers and the first surface, that is, by pressing the upper battery layers on the barrier, the barrier can play a supporting role, thereby improving the situation that the upper battery layers are pressed on the medium flow channel, and further reducing the possibility that the upper battery layers are crushed into the medium flow channel, which is beneficial to improving the reliability of the battery device. In addition, the arrangement of the barrier can also play a barrier role for the adhesive, thereby improving the situation that the adhesive overflows to the outside of the battery layers. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A structural schematic diagram of a vehicle is provided for an embodiment of the present disclosure;

[0035] Figure 2 A structural schematic diagram of a battery device is provided for an embodiment of the present disclosure;

[0036] Figure 3 A three-dimensional exploded schematic diagram of a battery device is provided for an embodiment of the present disclosure;

[0037] Figure 4 A partial three-dimensional exploded schematic diagram of a battery device is provided for a first embodiment of the present disclosure;

[0038] Figure 5 A connection structure schematic diagram of a battery assembly and a heat exchange member is provided for an embodiment of the present disclosure;

[0039] Figure 6 A connection structure schematic diagram of a battery assembly and a heat exchange member is provided for an embodiment of the present disclosure; Figure 5 An enlarged view of A in FIG. 8;

[0040] Figure 7 A partial three-dimensional exploded schematic diagram of a battery device is provided for a second embodiment of the present disclosure;

[0041] Figure 8 A connection structure schematic diagram of a barrier and a heat exchange member is provided for an embodiment of the present disclosure.

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] 10, battery layer; 11, battery cell; 111, pole; 12, first battery layer; 13, second battery layer; 20, box assembly; 21, first box part; 22, second box part; 30, thermal management assembly; 31, heat exchange member; 311, first heat exchange plate; 3111, first surface; 312, second heat exchange plate; 3121, first matching plane; 313, protrusion; 314, medium flow channel; 315, first flange part; 316, first flow channel group; 317, second flow channel group; 318, liquid inlet; 319, liquid outlet; 32, heating member; 33, upper cover; 331, second flange part; 40, barrier; 50, end plate; 51, first end plate; 52, second end plate; 53, third end plate; 54, fourth end plate; 100, battery device; 200, controller; 300, motor; 1000, vehicle. DETAILED DESCRIPTION

[0044] If there is no special description, all the embodiments and optional embodiments of the present disclosure can be combined with each other to form new technical solutions.

[0045] If there is no special description, all the technical features and optional technical features of the present disclosure can be combined with each other to form new technical solutions.

[0046] With the development of clean energy, more and more devices use electric energy as driving energy, and then as power battery which can store more electric energy and can be charged and discharged repeatedly. For example, lithium ion battery. Among them, the power battery is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields.

[0047] In the embodiment of the present disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0048] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The present disclosure is not limited thereto.

[0049] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The separator is arranged between the negative electrode and the positive electrode. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are inserted and extracted 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.

[0050] The electrode assembly can be in a wound structure, a stacked structure, or a hybrid structure of the wound and stacked structures.

[0051] In some embodiments, the electrode assembly is in a wound structure. The positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0052] In some embodiments, the electrode assembly is in a stacked structure.

[0053] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be provided, and the plurality of positive electrode sheets and the plurality of negative electrode sheets can be alternately stacked.

[0054] As an example, a plurality of positive electrode sheets can be provided, and the negative electrode sheet can be folded to form a plurality of folded segments that are stacked. One positive electrode sheet can be interposed between adjacent folded segments.

[0055] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be folded to form a plurality of folded segments that are stacked.

[0056] As an example, a plurality of separators can be provided, and each of the plurality of separators can be interposed between any adjacent positive electrode sheet or negative electrode sheet.

[0057] As an example, a plurality of separators can be provided, and each of the plurality of separators can be interposed between any adjacent positive electrode sheet or negative electrode sheet.

[0058] In some embodiments, the electrode assembly can have a cylindrical shape, a flat shape, or a polygonal shape.

[0059] In some embodiments, the electrode assembly can be provided with tabs. The tabs can guide current out of the electrode assembly. The tabs can include positive tabs and negative tabs.

[0060] In some embodiments, the battery cell can include a housing. The housing can be a steel housing, an aluminum housing, a plastic housing (e.g., a polypropylene housing), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing can protect the electrode assembly, and a sealing bag can be interposed between the housing and the electrode assembly. The sealing bag can be used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, the housing can be used to encapsulate the electrode assembly and the electrolyte, etc.

[0061] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell having another shape. The prismatic battery cell can include a square battery cell, a blade battery cell, a polygonal battery cell (e.g., a hexagonal battery cell), etc. The present disclosure is not particularly limited.

[0062] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap covers the opening. The shell can be provided with one or more openings. The end cap can also be provided with one or more openings.

[0063] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected with the tab. The electrode terminal can be directly connected with the tab or indirectly connected with the tab through a current collecting member. The electrode terminal can be provided on the end cap or on the shell.

[0064] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0065] In a new energy vehicle equipped with a battery device, the battery device can be used to provide power in whole or in part. In the related art, a single-layer battery layer arrangement is used, but the single-layer battery device can have a low energy density and limited power. In addition, the battery layer is arranged above the heat exchange member, and the battery layer can be pressed on the medium flow channel, which can cause the upper battery layer to crush the medium flow channel. Therefore, how to improve the energy density of the battery device while improving the reliability of the battery device has become an important research direction in the field.

[0066] In view of this, in order to improve the energy density of the battery device while improving the reliability of the battery device, the embodiments of the present disclosure provide a battery device, which includes a box assembly, a barrier, a heat management assembly, and a battery assembly. The battery assembly includes a plurality of battery layers stacked in a height direction of the battery device, and the plurality of battery layers are arranged in the box assembly. The heat management assembly includes a heat exchange member, the heat exchange member has at least one medium flow channel inside, the at least one medium flow channel is used to guide a heat exchange medium, and the heat exchange medium is used to exchange heat with the plurality of battery layers. The heat exchange member is arranged between the plurality of battery layers, and a first surface of the heat exchange member is configured to carry the battery layers. The barrier is arranged on the first surface and abuts between the battery layers and the first surface. The heat exchange member and the battery layers are provided with an adhesive layer therebetween, and the barrier is used to separate the adhesive layer.

[0067] The battery device provided by the embodiments of the present application comprises a box assembly, a heat management assembly, a partition piece and a battery assembly. The battery layers are arranged in the box assembly, and the box assembly protects the battery layers. On the one hand, by arranging multiple battery layers, the capacity of the battery device can be improved. In addition, by arranging the battery layers in a stacked manner along the height direction of the battery device, the space in the box assembly can be fully utilized, and the energy density of the battery device is improved. On the other hand, by arranging the heat exchange element between the multiple battery layers, the battery layers on the opposite sides of the heat exchange element can be simultaneously subjected to heat exchange, which is conducive to improving the heat exchange efficiency of the heat exchange element on the battery layers. That is, while improving the energy density of the battery device, the heat exchange efficiency can also be improved. In addition, by arranging the first surface of the heat exchange element to bear the battery layers and arranging the partition piece to abut between the battery layers and the first surface, that is, by pressing the upper battery layer on the partition piece, the partition piece can play a supporting role, so that the situation that the upper battery layer is pressed on the medium flow channel can be improved, and the possibility that the upper battery layer is pressed into the medium flow channel can be reduced. That is, while improving the energy density of the battery device, the reliability of the battery device can also be improved. In addition, the arrangement of the partition piece can also play a partitioning role on the adhesive, so as to improve the situation that the adhesive overflows to the outside of the battery layer.

[0068] The technical solutions described in the embodiments of the present application are suitable for use in an electric device using a battery device. The electric device comprises the battery device of any of the embodiments of the present application, and the battery device is used to provide electric energy.

[0069] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The embodiments of the present application do not specially limit the above electric devices.

[0070] It should be noted that the technical solutions described in the embodiments of the present application are not only limited to the above described battery device, but can also be applied to all electric devices and energy storage devices comprising the battery device. However, for the sake of simplicity, the following embodiments are described by taking an electric vehicle as an example.

[0071] Please refer to Figure 1The inside of the vehicle 1000 can be provided with a controller 200, a motor 300, and a battery device 100, the controller 200 being configured to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be arranged at the bottom or the front or the rear of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000, for example, the battery device 100 can be used as the operating power source of the vehicle 1000, and can be used for the circuit system of the vehicle 1000, for example, for the power demand of the vehicle 1000 during starting, navigation, and operation. In another embodiment of the present disclosure, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also can be used as the driving power source of the vehicle 1000, to replace or partially replace the fuel or natural gas to provide driving power for the vehicle 1000.

[0072] Please refer to Figures 2 to 8 The battery device 100 provided in the embodiments of the present disclosure includes a box assembly 20, a partition 40, a thermal management assembly 30, and a battery assembly. The battery assembly includes a plurality of battery layers 10 stacked along the height direction of the battery device 100, and the plurality of battery layers 10 are arranged in the box assembly 20. The thermal management assembly 30 includes a heat exchange member 31, the heat exchange member 31 has at least one medium flow channel 314 in the inside, and the at least one medium flow channel 314 is used to guide the heat exchange medium to exchange heat with the plurality of battery layers 10. The heat exchange member 31 is arranged between the plurality of battery layers 10, and a first surface 3111 of the heat exchange member 31 is configured to carry the battery layers 10. The partition 40 is arranged on the first surface 3111, and the partition 40 is arranged between the battery layers 10 and the first surface 3111. The heat exchange member 31 and the battery layers 10 are provided with an adhesive layer therebetween, and the partition 40 is used to separate the adhesive layer.

[0073] The plurality of layers in the embodiments of the present disclosure means two or more layers.

[0074] To meet different power requirements, the battery assembly of the battery device 100 includes a plurality of battery layers 10 stacked in the height direction, each battery layer 10 including a plurality of battery cells 11, which are the smallest units that make up a battery module or a battery pack. The plurality of battery cells 11 can be connected in series, in parallel, or in a mixed connection, which means that the plurality of battery cells 11 are connected in both series and parallel. The plurality of battery cells 11 can be directly connected in series, in parallel, or in a mixed connection, and the whole is then accommodated in the box assembly 20; of course, the battery device 100 can also be in the form of a plurality of battery cells 11 connected in series, in parallel, or in a mixed connection to form a battery module, and a plurality of battery modules connected in series, in parallel, or in a mixed connection to form a whole, which is then accommodated in the box assembly 20. The battery device 100 can also include other structures, for example, the battery device 100 can also include a busbar component for realizing the electrical connection between the plurality of battery cells 11. Each battery cell 11 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 11 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0075] The box assembly 20 can be a simple solid structure such as a cuboid or a cylinder or a sphere, or a complex solid structure composed of a simple solid structure such as a cuboid or a cylinder or a sphere. The material of the box assembly 20 can be an alloy material such as an aluminum alloy or a ferrous alloy, a high polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin.

[0076] The box assembly 20 is used to package the battery cells 11, and the box assembly 20 can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells 11.

[0077] By way of example, the box assembly 20 is generally in the shape of a cuboid, the length direction and the width direction of the box assembly 20 are parallel to the horizontal plane, and the length direction of the box assembly 20 is parallel to the longest side of the cuboid structure of the box assembly 20. The height direction of the box assembly 20 is perpendicular to the ground.

[0078] It should be noted that the specific type of heat exchange medium is not limited herein, as long as it can have a heat exchange effect on the battery cells 11, for example, it can be gaseous or liquid. In the embodiments of the present disclosure, the heat exchange medium is taken as a cooling liquid as an example for description.

[0079] It should be noted that the specific number of medium flow channels 314 is not limited herein. It can be one or a plurality.

[0080] By way of example, please refer to Figures 5 to 6The heat exchange component 31 comprises at least two heat exchange plates which are stacked to form at least one medium flow channel 314, i.e., the number of heat exchange plates is multiple.

[0081] Exemplarily, the heat exchange plate is a plate structure which can have certain structural strength and supporting strength, thereby facilitating to improve the overall structural strength and stability of the thermal management assembly 30.

[0082] Exemplarily, the heat exchange plate can also be punched or welded to form a specific structure according to requirements, for supporting, etc.

[0083] Exemplarily, please refer to Figures 7 to 8 The thermal management assembly 30 further comprises an inlet 318 and an outlet 319 which are both in communication with the medium flow channel 314.

[0084] Here, the inlet 318 and the outlet 319 of the thermal management assembly 30 are used to connect with the pipeline of the air conditioning system or the liquid storage device such as a water tank of the whole vehicle or the electric device.

[0085] The principle of the thermal management assembly 30 for heat exchange of the battery monomer 11 is that the heat exchange medium output by the heat exchange medium source (not shown in the figure) enters the medium flow channel 314 through the inlet 318 of the thermal management assembly 30, the heat exchange medium exchanges heat with the battery monomer 11, and then the heat exchange medium flows out through the outlet 319 of the thermal management assembly 30, thereby completing the heat exchange of the battery monomer 11.

[0086] Here, the heat exchange of the battery monomer 11 by the thermal management assembly 30 can be cooling of the battery monomer 11, or heating of the battery monomer 11.

[0087] The principle of the thermal management assembly 30 for cooling of the battery monomer 11 is that the heat exchange medium output by the heat exchange medium source enters the medium flow channel 314 through the inlet 318 of the thermal management assembly 30, the heat exchange medium absorbs the heat generated in the working process of the battery monomer 11, and then the heat exchange medium flows out through the outlet 319 of the thermal management assembly 30 to release the heat, thereby completing the cooling of the battery monomer 11.

[0088] The principle of the thermal management assembly 30 for heating of the battery monomer 11 is that the heat exchange medium output by the heat exchange medium source enters the medium flow channel 314 through the inlet 318 of the thermal management assembly 30, the heat exchange medium transfers heat to the battery monomer 11 to heat the battery monomer 11, and then the heat exchange medium flows out through the outlet 319 of the thermal management assembly 30, thereby completing the heating of the battery monomer 11.

[0089] The box assembly 20 is used to accommodate the battery monomer 11, and the box assembly 20 can have multiple structures. In some embodiments, please refer to Figure 2 and Figure 3The box assembly 20 can include a first box part 21 and a second box part 22, the first box part 21 and the second box part 22 being mutually coverable to define a containing space for containing the battery monomer 11.

[0090] To improve the sealing performance of the first box part 21 and the second box part 22 after being connected, a sealing member such as sealing glue, sealing ring, etc. can be arranged between the first box part 21 and the second box part 22.

[0091] Supposing that the first box part 21 is coverable on the top of the second box part 22, the first box part 21 can also be called an upper box cover, and the second box part 22 can also be called a lower box cover.

[0092] Exemplarily, the at least one heat exchange plate has a protruding part 313, and a medium flow channel 314 is formed in the protruding part 313.

[0093] Here, by having the at least one heat exchange plate have the protruding part 313 and forming the medium flow channel 314 in the protruding part 313, that is, the protruding part 313 can be set to a desired shape according to requirements, thereby facilitating the design flexibility of the medium flow channel 314.

[0094] In some embodiments, referring to Figure 8 The medium flow channel 314 includes a bending section.

[0095] Here, the size and path of the medium flow channel 314 can be freely designed according to the heat distribution or space distribution of the battery monomer 11, for example, by setting the medium flow channel 314 to include a bending section, thereby facilitating the heat exchange efficiency and assembly convenience.

[0096] Exemplarily, the heat exchange plate can be formed with the protruding part 313 by stamping.

[0097] Here, the specific material of the heat exchange plate is not limited.

[0098] In some embodiments, the heat exchange plate is set to be a metal plate. Exemplarily, the material of the heat exchange plate can be, for example, aluminum alloy, steel, etc.

[0099] The materials of different heat exchange plates can be the same or different.

[0100] In this embodiment, by setting the heat exchange plate to be a metal plate, the metal plate has good structural strength and good heat conduction performance, that is, the heat exchange plate has certain structural strength while meeting the requirement of the heat exchange member 31 having certain heat exchange efficiency.

[0101] Exemplarily, the at least two heat exchange plates are welded. That is, the heat exchange plates are connected by welding to form the heat exchange member 31, and thus the reliability of the connection structure between the heat exchange plates is facilitated.

[0102] Exemplarily, the heat exchange plates are connected by brazing.

[0103] Brazing can combine dissimilar metals (such as aluminum-based composite materials) through a hot rolling composite process, so that the material has high mechanical strength, corrosion resistance and fatigue resistance, and is suitable for load-bearing and harsh environments. In addition, the brazing connection has good air and liquid tightness, supports the dissimilar connection of various metals and alloys, and in addition, the size and path of the medium flow channel 314 can be freely designed, which is suitable for complex scenarios with irregular heat source distribution or limited space.

[0104] By providing the heat exchange element 31 to include at least two heat exchange plates, the at least two heat exchange plates are stacked to form at least one medium flow channel 314, so that the design flexibility of the heat exchange element 31 is improved, the size and path of the medium flow channel 314 can be freely designed, which is suitable for complex scenarios with irregular heat source distribution or limited space, and the heat exchange efficiency is further improved. In addition, by providing at least one heat exchange plate with a protruding portion 313 to form a medium flow channel 314 in the protruding portion 313, the design flexibility is further improved.

[0105] Exemplarily, the heat exchange element 31 and the battery layer 10 can be bonded by glue, and the provision of the barrier piece 40 can block the glue, thereby improving the situation that the glue flows out.

[0106] That is, the heat exchange element 31 and the battery layer 10 are provided with a glue layer, and the barrier piece 40 is used to block the glue layer.

[0107] The barrier piece 40 can be provided at the edge of the first surface 3111, and the glue layer is provided on the first surface 3111 and located inside the barrier piece 40.

[0108] Please refer to Figures 5 to 8 , the barrier piece 40 abuts between the battery layer 10 and the first surface 3111, that is, the upper battery layer 10 is pressed on the barrier piece 40, rather than on the heat exchange element 31, and the barrier piece 40 can play a supporting role, so that to a certain extent, the situation that the battery layer 10 crushes the medium flow channel 314 can be avoided.

[0109] Exemplarily, the barrier piece 40 can be higher than the protruding portion 313, and the medium flow channel 314 is formed in the protruding portion 313, so that the upper battery layer 10 is pressed on the barrier piece 40, rather than on the protruding portion 313.

[0110] The battery device 100 provided by the embodiments of the present application comprises a box assembly 20, a heat management assembly 30, a partition 40 and a battery assembly. The battery layers 10 are arranged in the box assembly 20, and the box assembly 20 protects the battery layers 10. On the one hand, by arranging multiple battery layers 10, the capacity of the battery device 100 is improved. In addition, by arranging the battery layers 10 in a stacked manner along the height direction of the battery device 100, the space in the box assembly 20 is fully utilized, and the energy density of the battery device 100 is improved. On the other hand, by arranging the heat exchange member 31 between the multiple battery layers 10, the heat exchange member 31 can simultaneously exchange heat with the battery layers 10 on the opposite sides of the heat exchange member 31, which improves the heat exchange efficiency of the heat exchange member 31 on the battery layers 10. That is, while improving the energy density of the battery device 100, the heat exchange efficiency is also improved. In addition, by arranging the first surface 3111 of the heat exchange member 31 to bear the battery layers 10 and arranging the partition 40 to abut between the battery layers 10 and the first surface 3111, that is, by pressing the upper battery layer 10 on the partition 40, the partition 40 can play a supporting role, so that the situation that the upper battery layer 10 is pressed on the medium flow channel 314 is improved, and the possibility that the upper battery layer 10 is crushed to the medium flow channel 314 is reduced. That is, while improving the energy density of the battery device 100, the reliability of the battery device 100 is also improved. In addition, the arrangement of the partition 40 can also play a partitioning role on the adhesive, thereby improving the situation that the adhesive overflows to the outside of the battery layers 10.

[0111] Here, there are various cases of the at least one heat exchange plate having the protruding portion 313.

[0112] In some embodiments, referring to Figures 5 to 8 , the heat exchange member 31 comprises at least two heat exchange plates, the heat exchange plates comprise a first heat exchange plate 311 and a second heat exchange plate 312, a partial region of the first heat exchange plate 311 is protruded to form a protruding portion 313, the first heat exchange plate 311 and the second heat exchange plate 312 are arranged in a stacked manner, and the medium flow channel 314 is defined between the protruding portion 313 and the second heat exchange plate 312.

[0113] That is, only a partial region of the first heat exchange plate 311 is protruded to form the protruding portion 313, and the second heat exchange plate 312 does not need to form the protruding portion 313, which is conducive to reducing the process of forming the protruding portion 313 on the second heat exchange plate 312 and reducing the positioning difficulty between the first heat exchange plate 311 and the second heat exchange plate 312, thereby improving the production efficiency.

[0114] In other embodiments, a partial region of the first heat exchange plate 311 and a partial region of the second heat exchange plate 312 are both protruded to form the protruding portion 313.

[0115] Exemplarily, the first heat exchange plate 311 is arranged above the second heat exchange plate 312, and thus the first heat exchange plate 311 has a first surface 3111.

[0116] In some embodiments, the first surface 3111 is a surface of a side of the first heat exchange plate 311 facing away from the second heat exchange plate 312.

[0117] Here, the protruding part 313 of the first heat exchange plate 311 and the protruding part 313 of the second heat exchange plate 312 can be arranged oppositely to form the medium flow channel 314 between the protruding part 313 of the first heat exchange plate 311 and the protruding part 313 of the second heat exchange plate 312; or the protruding part 313 of the first heat exchange plate 311 and the protruding part 313 of the second heat exchange plate 312 can be arranged staggeredly to form the medium flow channel 314 between the protruding part 313 of the first heat exchange plate 311 and the non-protruding part of the second heat exchange plate 312, and between the protruding part 313 of the second heat exchange plate 312 and the non-protruding part of the first heat exchange plate 311.

[0118] In some embodiments, referring to Figures 5 to 6 , the multi-layer battery layer 10 includes the first battery layer 12 and the second battery layer 13 arranged adjacently, and the second battery layer 13 is located above the first battery layer 12. A first matching plane 3121 is formed on a side of the second heat exchange plate 312 facing away from the first heat exchange plate 311, the first matching plane 3121 faces the first battery layer 12, and the first heat exchange plate 311 faces the second battery layer 13.

[0119] In addition to the first battery layer 12 and the second battery layer 13, the multi-layer battery layer 10 can also include other battery layers 10, for example, a third battery layer 10, etc. The third battery layer 10 can be located below the first battery layer 12 or above the second battery layer 13.

[0120] The first battery layer 12 and the second battery layer 13 are arranged with the heat exchange member 31.

[0121] Here, the first heat exchange plate 311 and the second heat exchange plate 312 are arranged in layers, the first heat exchange plate 311 is located above the second heat exchange plate 312, and the second heat exchange plate 312 has a first matching plane 3121 formed on a side thereof facing away from the first heat exchange plate 311, that is, the first matching plane 3121 is used to cooperate with the first battery layer 12, and the protruding part 313 is arranged on a side of the heat exchange member 31 facing the second battery layer 13.

[0122] In this embodiment, the second heat exchange plate 312 has a first matching plane 3121 formed on a side thereof facing away from the first heat exchange plate 311, and the first matching plane 3121 is used to cooperate with the first battery layer 12, so that the heat exchange member 31 can better cooperate with the first battery layer 12.

[0123] In a relatively cold environment, the temperature of the battery device 100 can be relatively low, which can affect the performance of the battery device 100. In the related art, a heating device is provided to heat the heat exchange medium, thereby heating the battery monomer 11. However, this method has the problems of complex structure and high cost.

[0124] In some embodiments, referring to Figures 4 to 6 The heat management assembly 30 further comprises a heating member 32, and the heating member 32 is arranged between the first matching plane 3121 and the first battery layer 12.

[0125] Exemplarily, the heating member 32 can be a heating film, and further, the heating member 32 can be an electric heating film.

[0126] Exemplarily, the heating member 32 has a heating resistor inside, and the heating resistor generates heat after being powered on to heat the battery layer 10.

[0127] When the battery layer 10 needs to be heated, part of the heat generated by the heating member 32 can be directly transmitted to the first battery layer 12, and the other part can be transmitted to the second battery layer 13 through the heat exchange member 31. The material of the heat exchange member 31 can better transmit the heat generated by the heating member 32 to the second battery layer 13. In this way, the heating member 32 can simultaneously heat two adjacent battery layers 10 (for example, the first battery layer 12 and the second battery layer 13), thereby improving the heating efficiency.

[0128] When the battery layer 10 needs to be cooled, the cold generated by the heat exchange member 31 can be transmitted to the first battery layer 12 through the heating member 32 (which does not generate heat at this time) to achieve heat dissipation of the first battery layer 12.

[0129] The heating member 32 is arranged between the first matching plane 3121 and the first battery layer 12, that is, the heating member 32 is arranged between the first matching plane 3121 and the first battery layer 12, in other words, the first matching plane 3121 contacts the first battery layer 12 through the heating member 32.

[0130] Exemplarily, the heating member 32 can be first attached to the surface of the heat exchange member 31, that is, attached to the first matching plane 3121, and then the heat exchange member 31 and the heating member 32 are matched with the first battery layer 12, for example, fixed by gluing. Of course, the heating member 32 can also be first attached to the first battery layer 12, and then the heat exchange member 31 and the heating member 32 are fixed to the first battery layer 12 by gluing.

[0131] In the embodiment, the heating member 32 is arranged between the first matching plane 3121 and the first battery layer 12 to simultaneously heat the first battery layer 12 and the second battery layer 13, which is simple in structure, low in cost, and conducive to improving the heating efficiency. In addition, the first matching plane 3121 is formed on the side of the second heat exchange plate 312 away from the first heat exchange plate 311, which facilitates the arrangement of the heating member 32, so that the heating member 32 is better attached to the heat exchange member 31.

[0132] In some embodiments, referring to Figures 7 to 8 The heat exchange member 31 includes a first flow channel group 316 and a second flow channel group 317. The first flow channel group 316 includes a liquid inlet 318 and at least one medium flow channel 314. The second flow channel group 317 includes a liquid outlet 319 and at least one medium flow channel 314. One end of the medium flow channel 314 of the first flow channel group 316 is in communication with the liquid inlet 318. One end of the medium flow channel 314 of the second flow channel group 317 is in communication with the liquid outlet 319. The end of the medium flow channel 314 of the first flow channel group 316 away from the liquid inlet 318 is in communication with the end of the medium flow channel 314 of the second flow channel group 317 away from the liquid outlet 319.

[0133] That is, the heat exchange medium flows into the medium flow channel 314 of the first flow channel group 316 from the liquid inlet 318, then flows into the medium flow channel 314 of the second flow channel group 317, and flows out from the liquid outlet 319.

[0134] In the embodiment in which the first flow channel group 316 includes a plurality of medium flow channels 314, the same end of the plurality of medium flow channels 314 of the first flow channel group 316 is in communication with the liquid inlet 318.

[0135] In the embodiment in which the second flow channel group 317 includes a plurality of medium flow channels 314, the same end of the plurality of medium flow channels 314 of the second flow channel group 317 is in communication with the liquid outlet 319.

[0136] In the embodiment, the heat exchange member 31 is arranged to include the first flow channel group 316 and the second flow channel group 317, so that the medium flow channel 314 of the first flow channel group 316 is in communication with the liquid inlet 318, and the medium flow channel 314 of the second flow channel group 317 is in communication with the liquid outlet 319. The size and path of the medium flow channel 314 can be freely designed according to the heat distribution or spatial distribution of the battery monomer 11, which is conducive to further improving the heat exchange efficiency.

[0137] In some embodiments, referring to Figures 5 to 8 Each battery layer 10 includes a plurality of battery monomers 11 arranged along a first direction. The medium flow channel 314 extends along the first direction. The first flow channel group 316 and the second flow channel group 317 are arranged along a second direction. The first direction intersects the second direction.

[0138] Here, the liquid inlet 318 and the liquid outlet 319 can be located on the same side of the heat exchange member 31 along the first direction, or can be located on different sides of the heat exchange member 31 along the first direction.

[0139] In this embodiment, by setting the arrangement direction of the battery cell 11 and the extension direction of the medium flow channel 314 to be the same, the uniformity of heat exchange is improved, thereby improving the temperature uniformity of the battery cell 11.

[0140] In some embodiments, referring to Figures 6 to 8 , the size h1 of the battery cell 11 along the height direction of the battery device 100 and the size h2 of the battery cell 11 along the first direction are smaller than the size h3 of the battery cell 11 along the second direction, the first direction, the second direction, and the height direction of the battery device 100 intersect, and the size of the battery cell 11 along the second direction is in the range of 300mm to 1200mm.

[0141] The size of the battery cell 11 along the second direction can be a point value of any one of 300mm, 350mm, 400mm, 450mm, 500mm, 560mm, 600mm, 650mm, 700mm, 780mm, 800mm, 830mm, 860mm, 900mm, 950mm, 1000mm, 1050mm, 1100mm, 1150mm, 1200mm or a point value between any two of them.

[0142] Here, h1, h2, and h3 can be measured by a vernier caliper or other measuring tools at room temperature before the battery device 100 is used.

[0143] It should be noted that h1, h2, and h3 do not include the size of the pole 111 and / or the pressure relief structure, i.e., h1, h2, and h3 can be obtained by measuring the size of the shell of the battery cell 11.

[0144] In this embodiment, by setting the size of the battery cell 11 along the second direction to be in the range of 300mm to 1200mm, the capacity and assembly efficiency of the battery device 100 can be considered.

[0145] For example, the battery cell 11 in this embodiment can be a blade battery, which is long and thin in shape.

[0146] The size of the battery cell 11 along the height direction of the battery device 100 can be greater than the size of the battery cell 11 along the first direction, or the size of the battery cell 11 along the height direction of the battery device 100 can be smaller than the size of the battery cell 11 along the first direction.

[0147] It is understandable that, while facilitating the stacking of battery cells 11 along the first direction, it also facilitates the stacking of battery cells 11 along the height direction. In other words, the number of battery cells 11 can be increased in both the first and height directions to increase the capacity of the battery device 100.

[0148] In some implementations, please refer to Figures 7 to 8 The battery cell 11 also includes a terminal post 111 and / or a pressure relief structure, the terminal post 111 and / or the pressure relief structure being disposed on at least one side of the battery cell 11 along the second direction, the first direction, the second direction and the height direction of the battery device 100 intersecting.

[0149] It is understandable that the individual battery cells 11 of the battery layer 10 are arranged along the first direction, and the battery layers 10 are stacked along the height direction of the battery device 100. Therefore, it is not convenient to set the terminal posts 111 and / or pressure relief structures in the first direction and the height direction of the battery device 100. For example, if the terminal posts 111 and / or pressure relief structures are set in the first direction or the height direction of the battery device 100, then the terminal posts 111 and / or pressure relief structures need to be avoided, which is not conducive to improving the structural compactness.

[0150] Thus, when the battery cells 11 are stacked along the first direction, the terminals 111 are disposed on the side of the battery cells 11, facilitating the electrical connection of multiple battery cells 11 to achieve series and / or parallel connection. It should be noted that the terminals 111 include positive terminals 111 and negative terminals 111. During the charging and discharging process of the battery, the positive terminals 111 and negative terminals 111 are electrically connected to form a current loop. Alternatively, the positive terminals 111 and / or negative terminals 111 of multiple battery cells 11 can be electrically connected to achieve series and / or parallel connection.

[0151] In this embodiment, by placing the terminal post 111 and / or the pressure relief structure on at least one side of the battery cell 11 along the second direction, it is beneficial to improve the structural compactness of the battery device 100 and also to reduce the possibility of damage to the terminal post 111 and / or the pressure relief structure during the stacking of the battery cell 11 and / or the battery layer 10.

[0152] In some implementations, please refer to Figures 5 to 8 Along the second direction, the first flow channel group 316 is closer to the pole post 111 and / or the pressure relief structure than the second flow channel group 317.

[0153] Here, the medium flow channels 314 of the first flow channel group 316 are in communication with the liquid inlet 318, and the medium flow channels 314 of the second flow channel group 317 are in communication with the liquid outlet 319. During heat exchange, the heat exchange medium first flows through the medium flow channels 314 of the first flow channel group 316, and then flows through the medium flow channels 314 of the second flow channel group 317. In this way, the temperature of the medium flow channels 314 in the first flow channel group 316 is relatively lower than that of the medium flow channels 314 in the second flow channel group 317. The temperature of the battery monomer 11 close to the pole column 111 and / or the pressure relief structure is relatively higher than that of the battery monomer 11 away from the pole column 111 and / or the pressure relief structure. In this way, by arranging the first flow channel group 316 to be closer to the pole column 111 and / or the pressure relief structure than the second flow channel group 317, the heat exchange efficiency is improved, and the temperature uniformity of the battery monomer 11 is improved.

[0154] In some embodiments, referring to Figures 7 to 8 , each battery layer 10 includes a plurality of battery monomers 11 arranged along a first direction, and the protruding portion 313 is provided with a barrier 40 on at least one side along a second direction, and the first direction, the second direction, and the height direction of the battery device 100 intersect.

[0155] The protruding portion 313 can be provided with a barrier 40 on one side along the second direction, or the protruding portion 313 can be provided with a barrier 40 on both sides along the second direction.

[0156] Of course, the barrier 40 can also be arranged at the middle position of the protruding portion 313, for example, the barrier 40 is arranged at the gap between adjacent medium flow channels 314.

[0157] Exemplarily, the barrier 40 extends along the first direction.

[0158] In this embodiment, the protruding portion 313 is provided with a barrier 40 on at least one side along the second direction, which is beneficial to the barrier effect of the adhesive, thereby further improving the overflow of the adhesive.

[0159] In some embodiments, referring to Figures 7 to 8 , the protruding portion 313 is provided with a barrier 40 on both sides along the second direction, and the two barriers 40 are respectively supported on both ends of the battery monomer 11 along the second direction.

[0160] That is, the two barriers 40 are respectively located on the outer side of the protruding portion 313 along the second direction, which is further beneficial to improve the overflow of the adhesive. In addition, by supporting the two barriers 40 on both ends of the battery monomer 11 along the second direction, the support effect of the barrier 40 on the battery monomer 11 is improved, which can further reduce the possibility of crushing the medium flow channel 314 of the upper battery layer 10, thereby further improving the reliability of the battery device 100.

[0161] In some embodiments, referring to Figures 5 to 8 each battery layer 10 includes a plurality of battery cells 11 arranged along a first direction, and the battery assembly further includes at least one end plate 50, the at least one end plate 50 being arranged at at least one end of the battery layer 10 along the first direction, and the heat exchange member 31 being connected to the end plate 50 at at least one end along the first direction, the first direction intersecting a height direction of the battery device 100.

[0162] The number of end plates 50 can be one or more.

[0163] The battery layer 10 can be arranged with the end plate 50 at one end along the first direction, and the other end can be abutted against a side wall of the box assembly 20. The battery layer 10 can also be arranged with the end plate 50 at both ends along the first direction.

[0164] In the embodiment in which the battery layer 10 is arranged with the end plate 50 at both ends along the first direction, the heat exchange member 31 is connected to the end plate 50 at both ends along the first direction.

[0165] Here, the end plate 50 is used to constrain the battery layer 10 in the first direction, and at least used to bear the expansion force of the battery cells 11. Here, the expansion force specifically refers to the force applied to the box assembly 20 due to the expansion deformation of the battery cells 11. As an example, the end plate 50 mainly bears the expansion force in the first direction.

[0166] In some related technologies, the end plate 50 is also referred to as an expansion beam.

[0167] The specific structure and material of the end plate 50 are not limited, and as an example, the end plate 50 can be a beam structure, and the end plate 50 can be made of any suitable material, such as a metal material, a polymer material, a composite material, etc.

[0168] The specific connection mode of the heat exchange member 31 and the end plate 50 is not limited, and can be fastening connection, clamping or welding, as long as the force received by the heat exchange member 31 can be transmitted to the end plate 50.

[0169] As an example, referring to Figure 3 the box assembly 20 includes a frame and a bottom wall, the frame is arranged along the edge of the bottom wall, the frame and the bottom wall jointly enclose a containing space, and the end plate 50 is connected to the frame. It can be understood that the heat exchange member 31 can transmit the force received to the end plate 50, and the end plate 50 can transmit the force received to the frame, that is, the frame can provide support for the end plate 50, and the end plate 50 can provide support for the heat exchange member 31.

[0170] As an example, the two ends of the end plate 50 along the second direction are connected to the frame.

[0171] Exemplarily, the end plate 50 can be connected with the frame first, and then the battery layer 10 is assembled; or the end plate 50 can be assembled with the battery layer 10 first, and then the pre-assembled end plate 50 and the battery layer 10 are assembled to the frame.

[0172] In this embodiment, by arranging the end plate 50 at at least one end of the battery layer 10 along the first direction, and connecting the heat exchange member 31 to the end plate 50 at at least one end along the first direction, the heat exchange member 31 is facilitated to transmit the force received by the heat exchange member 31 to the frame through the end plate 50, the support strength of the battery layer 10 is improved, and the possibility of the lower battery layer 10 being pressed and damaged due to excessive stacking is reduced, thereby improving the capacity of the battery device 100 while improving the reliability of the battery device 100.

[0173] In some embodiments, referring to Figures 3 to 5 , the plurality of battery layers 10 include a first battery layer 12 and a second battery layer 13, and the second battery layer 13 is located above the first battery layer 12. The end plate 50 includes a first end plate 51 and a second end plate 52 arranged opposite to each other along the first direction, the first battery layer 12 is arranged between the first end plate 51 and the second end plate 52, and the heat exchange member 31 is connected to the first end plate 51 and the second end plate 52 at both ends along the first direction, respectively.

[0174] That is, the heat exchange member 31 arranged between the first battery layer 12 and the second battery layer 13 is connected to the first end plate 51 and the second end plate 52 corresponding to the first battery layer 12. In other words, the heat exchange member 31 is connected to the end plate 50 corresponding to the lower battery layer 10.

[0175] In some embodiments, referring to Figures 3 to 5 , the end plate 50 includes a third end plate 53 and a fourth end plate 54 arranged opposite to each other along the first direction, the second battery layer 13 is arranged between the third end plate 53 and the fourth end plate 54, and the heat exchange member 31 is connected to the third end plate 53 and the fourth end plate 54 at both ends along the first direction, respectively.

[0176] That is, the heat exchange member 31 arranged between the first battery layer 12 and the second battery layer 13 is connected to the third end plate 53 and the fourth end plate 54 corresponding to the second battery layer 13. In other words, the heat exchange member 31 is connected to the end plate 50 corresponding to the upper battery layer 10.

[0177] Here, the heat exchange member 31, the third end plate 53, the fourth end plate 54, and the second battery layer 13 form an integral whole, and then are stacked with other battery layers 10, which is conducive to improving the overall structural strength of the battery device 100.

[0178] In other embodiments, the heat exchange member 31 can be connected to the first end plate 51, the second end plate 52, the third end plate 53, and the fourth end plate 54 simultaneously.

[0179] Of course, in some embodiments, the battery layer 10 is used to support the heat exchange member 31 above.

[0180] That is, the weight of the heat exchange member 31 is supported on the battery layer 10, that is, the battery layer 10 is used to support the heat exchange member 31 above.

[0181] In some embodiments, the battery assembly comprises a mounting bracket, the mounting bracket is connected to the box assembly 20, and the heat exchange member 31 is connected to the mounting bracket.

[0182] Exemplarily, the mounting bracket is connected to the bottom wall of the box assembly 20.

[0183] Exemplarily, the mounting bracket is connected to the frame of the box assembly 20.

[0184] In some embodiments, referring to Figure 7 , the heat exchange member 31 forms a first flange portion 315 at least at one end in the first direction, and the first flange portion 315 is connected to the end plate 50.

[0185] The heat exchange member 31 can form a first flange portion 315 at one end in the first direction, or can form a first flange portion 315 at both ends in the first direction.

[0186] That is, the heat exchange member 31 is folded towards the end plate 50 to form the first flange portion 315, and is connected to the end plate 50 through the first flange portion 315. This connection structure is simple and reliable, and is easy to form.

[0187] In some embodiments, referring to Figures 3 to 4 , the thermal management assembly 30 further comprises an upper cover 33, the upper cover 33 is arranged on the top of the uppermost battery layer 10, and a heating member 32 is arranged between the upper cover 33 and the uppermost battery layer 10.

[0188] Exemplarily, the heating member 32 can be first attached to the surface of the upper cover 33, that is, attached to the surface of the upper cover 33 facing the battery layer 10, and then the upper cover 33 and the heating member 32 are matched with the uppermost battery layer 10, for example, fixed by gluing. Of course, the heating member 32 can be first attached to the uppermost battery layer 10, and then the upper cover 33 and the heating member 32 and the uppermost battery layer 10 are fixed by gluing.

[0189] In this embodiment, by arranging the upper cover 33 and arranging the heating member 32 between the upper cover 33 and the uppermost battery layer 10, the arrangement of the heating member 32 is facilitated, so that the heating member 32 is better attached to the heat exchange member 31, and the heating member 32 can be protected, thereby improving the reliability of the thermal management assembly 30.

[0190] In some embodiments, referring toFigures 3 to 4 The upper cover 33 is formed with a second flange portion 331 at at least one end in the first direction, and the second flange portion 331 is connected with the end plate 50.

[0191] The upper cover 33 can be formed with the second flange portion 331 at one end in the first direction, or can be formed with the second flange portion 331 at both ends in the first direction.

[0192] That is, the upper cover 33 is folded towards the end plate 50 to form the second flange portion 331, and the second flange portion 331 is connected with the end plate 50, which is simple and reliable, and is easy to form.

[0193] The specific connection mode of the second flange portion 331 and the end plate 50 is not limited, and can be fastening connection, clamping or welding. The connection structure is simple and reliable.

[0194] In the description of the present disclosure, the description of the terms "in an embodiment", "in some embodiments", "in another embodiment", "in yet another embodiment", or "exemplary" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present disclosure. In the present disclosure, the exemplary description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present disclosure and the features of different embodiments or examples can be combined by those skilled in the art without contradiction.

[0195] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application is included in the protection scope of the present application.

Claims

1. A battery device, characterized in that, include: Enclosure assembly; A battery assembly comprising multiple battery layers stacked along the height direction of the battery device, wherein the multiple battery layers are disposed within the housing assembly; A thermal management component includes a heat exchanger and a heating element. The heat exchanger has at least one medium flow channel inside, which is used to conduct a heat exchange medium for exchanging heat with multiple battery layers. The heat exchanger is disposed between the multiple battery layers, and a first surface of the heat exchanger is configured to support the battery layers. The multilayer battery layer includes a first battery layer and a second battery layer disposed adjacent to each other, with the second battery layer located above the first battery layer; The heat exchanger forms a first mating plane on the side facing the first battery layer, and the heating element is disposed between the first mating plane and the first battery layer. A partition member is disposed on at least one side of the first surface, and the partition member abuts between the second battery layer and the first surface; An adhesive layer is provided between the heat exchanger and the battery layer, and the partition is used to block the adhesive layer. The battery assembly further includes end plates, and the end plates are respectively disposed at both ends of the multilayer battery layers along the first direction; the end plates are used to constrain the battery layers in the first direction and at least to withstand the expansion force of the battery layers; the heat exchanger is connected to the end plates at both ends along the first direction. The thermal management component also includes a top cover, which is disposed on top of the uppermost battery layer; Both ends of the top cover along the first direction are connected to the end plate; the heating element is also provided between the top cover and the top of the uppermost battery layer.

2. The battery device according to claim 1, characterized in that, The heat exchanger includes at least two heat exchange plates, each including a first heat exchange plate and a second heat exchange plate. A portion of the first heat exchange plate protrudes to form a raised portion. The first heat exchange plate and the second heat exchange plate are stacked together, and the raised portion and the second heat exchange plate define the medium flow channel.

3. The battery device according to claim 2, characterized in that, Each of the battery layers includes a plurality of battery cells arranged along a first direction, and the protrusion is provided with the partition on at least one side along a second direction. The first direction, the second direction and the height direction of the battery device intersect.

4. The battery device according to claim 3, characterized in that, The protrusion is provided with the partition on both sides along the second direction, and the two partitions are respectively supported at both ends of the battery cell along the second direction.

5. The battery device according to claim 1, characterized in that, The heat exchanger includes a first flow channel group and a second flow channel group. The first flow channel group includes a liquid inlet and at least one medium flow channel. The second flow channel group includes a liquid outlet and at least one medium flow channel. One end of the medium flow channel of the first flow channel group is connected to the liquid inlet, and one end of the medium flow channel of the second flow channel group is connected to the liquid outlet. The end of the medium flow channel of the first flow channel group away from the liquid inlet is connected to the end of the medium flow channel of the second flow channel group away from the liquid outlet.

6. The battery device according to claim 5, characterized in that, Each of the battery layers includes a plurality of battery cells arranged along a first direction, the dielectric channels extend along the first direction, the first channel group and the second channel group are arranged along a second direction, and the first direction and the second direction intersect.

7. The battery device according to claim 6, characterized in that, The dimensions of the battery cell along the height direction of the battery device and the dimensions of the battery cell along the first direction are smaller than the dimensions of the battery cell along the second direction. The first direction, the second direction and the height direction of the battery device intersect. The dimensions of the battery cell along the second direction are in the range of 300mm to 1200mm.

8. The battery device according to claim 6 or 7, characterized in that, The battery cell further includes a terminal post and / or a pressure relief structure, the terminal post and / or pressure relief structure being disposed on at least one side of the battery cell along a second direction, the first direction, the second direction and the height direction of the battery device intersect.

9. The battery device according to claim 8, characterized in that, Along the second direction, the first flow channel group is closer to the pole and / or pressure relief structure than the second flow channel group.

10. An electrical device, characterized in that, Includes the battery device according to any one of claims 1 to 9.

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