Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, and belongs to the technical field of batteries. The battery device comprises a battery unit and a colloid wall, wherein the battery unit comprises a plurality of single batteries which are arranged side by side along a first direction; each battery monomer comprises two first shell walls which are oppositely arranged along a first direction; the colloid wall is adhered between two first shell walls which are close to each other in two battery monomers which are adjacently arranged along the first direction; and the colloid wall is matched with the current first shell wall to form a heat exchange runner. The battery device and the electric equipment provided by the utility model aim at improving the heat exchange efficiency of the battery device and improving the energy density of the battery device.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery device and an electrical equipment. Background Art

[0002] With the extensive development of new energy technologies, battery devices have been extremely widely used. Generally, a battery device generates heat during use, and a heat exchange structure needs to be provided in the battery device to adjust the temperature of the battery device so that the battery device can operate at an appropriate ambient temperature.

[0003] However, there is still room for improvement in the heat exchange efficiency of the heat exchange structures in related technologies, and there is an impact on the overall energy density of the battery. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a battery device and an electrical equipment, which can improve the heat exchange efficiency of the battery device and increase the energy density of the battery device.

[0005] In a first aspect, the present application provides a battery device, which includes a battery unit and a colloidal wall. The battery unit includes a plurality of battery monomers arranged side by side in a first direction; each battery monomer includes two first housing walls oppositely arranged in the first direction; the colloidal wall is bonded between two adjacent first housing walls of two adjacent battery monomers arranged in the first direction; wherein, the colloidal wall and the first housing wall where it is located jointly form a heat exchange flow channel.

[0006] In the technical solution of the embodiments of the present application, the colloidal wall is bonded between two adjacent first housing walls of two adjacent battery monomers arranged in the first direction, and the colloidal wall and the first housing wall where it is located jointly form a heat exchange flow channel. Such a design enables the heat exchange flow channel to be jointly formed by the first housing wall of the battery monomer and the colloidal wall, so that the heat exchange liquid in the heat exchange flow channel can directly contact the first housing wall of the battery monomer, which can improve the heat exchange efficiency between the heat exchange liquid and the battery monomer; the colloidal wall and the first housing wall jointly form a heat exchange flow channel, which can reduce the volume of the battery unit in the first direction, or more battery monomers can be arranged in the first direction, thereby improving the volume energy density and mass energy density of the battery device.

[0007] In some embodiments, the first housing wall is the large surface of the housing of the battery monomer. Such a design can increase the contact area between the heat exchange flow channel and the battery monomer, thereby further improving the heat exchange efficiency of the battery device.

[0008] In some embodiments, there are multiple colloid walls, and the multiple colloid walls are arranged in sequence along the second direction; adjacent colloid walls cooperate with two first shell walls to form a sub-channel, and the multiple sub-channels together constitute a heat exchange channel, and the first direction intersects with the second direction. The multiple sub-channels together constitute the heat exchange channel, so that when the volume of the battery cell is large, the design of multiple sub-channels can be used to reduce the total volume of the heat exchange channel, and the multiple sub-channels can be used to evenly exchange heat on the first shell wall, thereby reducing the requirements for the heat exchange liquid flow without reducing the heat exchange effect.

[0009] In some embodiments, the multiple colloid walls disposed between the two first shell walls are arranged at equal intervals along the second direction. Such a design can keep the volumes of different sub-channels the same, thereby facilitating uniform distribution of the heat exchange liquid in different sub-channels, so that the heat exchange liquid in the heat exchange channel can evenly exchange heat with different positions of the first shell wall.

[0010] In some embodiments, the colloid wall is polyurethane curing glue, epoxy resin curing glue, acrylate curing glue or silicone curing glue. The material of the colloid wall is selected according to the type of heat exchange fluid, so that the colloid wall has stable physical and chemical properties, good structural strength to cooperate with the first shell wall to form a heat exchange flow channel, and good resistance to heat exchange fluid corrosion, and better reliability.

[0011] In some embodiments, the battery device further includes a rubber barrier strip, which is disposed between the two first shell walls and connected to the colloid wall, and the rubber barrier strip is disposed on a side of the colloid wall close to the heat exchange flow channel, and / or the rubber barrier strip is disposed on a side of the colloid wall away from the heat exchange flow channel. By arranging the rubber barrier strip on a side of the colloid wall close to and / or away from the heat exchange flow channel, during the process of the colloid wall being gradually solidified from the liquid colloid, the rubber barrier strip can be used to reduce the probability of the liquid colloid overflowing, thereby effectively improving the molding success rate of the colloid wall and achieving higher molding efficiency.

[0012] In some embodiments, multiple groups of battery cells are arranged side by side along a third direction, and each battery cell includes two second shell walls arranged opposite to each other along the third direction. The two second shell walls are glued and fixed between adjacent second shell walls, and the third direction intersects with the first direction. Such a design can reduce the gap between adjacent battery cells in the third direction, and connect multiple heat exchange channels in the third direction, making the structure of the battery device more compact, and further improving the volume energy density of the battery device.

[0013] In some embodiments, multiple sets of battery cells are arranged side by side in the third direction. The heat exchange channels in two adjacent columns of battery monomers arranged in the third direction are connected to form a heat exchange branch. The battery device includes a heat exchange member; wherein, the liquid inlet end and the liquid outlet end of each heat exchange branch are respectively connected to the heat exchange member. Such a design enables multiple sets of battery cells in the battery device to form a battery array, and multiple heat exchange branches can be arranged in the battery array. By connecting the liquid inlet end and the liquid outlet end of each heat exchange branch to the heat exchange member respectively, a circulating loop of the heat exchange liquid is formed, so that the heat exchange liquid can reciprocally circulate between the heat exchange member and different heat exchange branches, and then continuously exchange heat with the battery monomers, so that each battery monomer can work at a suitable ambient temperature.

[0014] In some embodiments, the battery device further includes a sealing wall, which is connected to the colloidal wall and is arranged at the inlet end and the outlet end of the heat exchange channel. The sealing wall is annular, and the colloidal wall is located on the side of the sealing wall close to the heat exchange channel. Connecting the sealing wall to the colloidal wall and arranging it at the inlet end and the outlet end of the heat exchange channel can improve the sealing performance at these two positions and reduce the risk of leakage of the heat exchange liquid in the heat exchange channel.

[0015] In some embodiments, the sealing wall is polyurethane cured glue, epoxy resin cured glue, acrylate cured glue or silicone cured glue. Such a design method makes the material of the sealing wall basically the same as that of the colloidal wall, which is beneficial to improving the connection strength between the sealing wall and the colloidal wall and enhancing the structural stability of the sealing wall.

[0016] In some embodiments, the first housing wall is provided with an anti-corrosion coating, and the orthographic projection of the heat exchange channel on the first housing wall completely falls within the orthographic projection of the anti-corrosion coating on the first housing wall. In the battery assembly of the embodiment of the present application, the side of the first housing wall facing the heat exchange channel is provided with an anti-corrosion coating to increase the corrosion resistance of the first housing wall to the heat exchange liquid by using the anti-corrosion coating, and reduce the risk of the first housing wall being corroded under long-term contact with the heat exchange liquid, thereby further improving the reliability of the battery device.

[0017] In a second aspect, the present application further provides an electrical device, which includes the battery device provided in any of the foregoing embodiments, and the battery device is used to provide electrical energy.

[0018] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Structural schematic diagram of a vehicle according to some embodiments of the present application;

[0021] Figure 2 Exploded structural schematic diagram of a battery device according to some embodiments of the present application;

[0022] Figure 3 Exploded structural schematic diagram of a battery cell according to some embodiments of the present application;

[0023] Figure 4 Schematic diagram of the cooperation of partial structures of a battery device according to some embodiments of the present application from one angle;

[0024] Figure 5 For Figure 4 Schematic diagram of the cooperation of partial structures of the battery device shown from another angle;

[0025] Figure 6 Schematic diagram of the cooperation of partial structures of a battery device according to some embodiments of the present application from one angle;

[0026] Figure 7 For Figure 6 Schematic diagram of the cooperation of partial structures of the battery device shown from another angle;

[0027] Figure 8 For Figure 4 Enlarged view of part A of the battery device shown;

[0028] Figure 9 Schematic diagram of the cooperation of partial structures of a battery device according to some embodiments of the present application from one angle.

[0029] Explanation of reference numerals: 1000, vehicle; 200, controller; 300, motor;

[0030] 100. Battery device; 10. Battery cell; 11. Battery monomer; 111. End cap; 111a. Electrode terminal; 112. Housing; 1121. First housing wall; 1122. Second housing wall; 113. Core component; 113a. Tab; 20. Colloidal wall; 30. Rubber stopper; 40. Heat exchanger; 41. Body part; 42. Inlet liquid main pipe; 43. Outlet liquid main pipe; 50. Sealing wall; 60. Anticorrosion coating; 90. Box body; 91. First part; 92. Second part; 101. Heat exchange flow path; 1011. Sub-flow path;

[0031] X. First direction; Y. Second direction; Z. Third direction. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for facilitating the description of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0034] In addition, if there are terms such as "and / or", "and / or" is only a relationship describing the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship. If there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if there are terms such as "multiple", the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In this application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation manner.

[0038] At present, from the perspective of the development of the market situation, the application of battery devices is becoming more and more extensive. Battery devices are not only applied to energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely applied to electric transportation means such as electric bicycles, electric motorcycles, electric vehicles, as well as multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of battery devices, the market demand for them is also continuously increasing.

[0039] The battery device is installed on a vehicle. During charging and discharging of battery cells and in some working conditions with extremely high or low ambient temperatures, the temperature of the battery cells themselves will change, resulting in too high or too low temperatures of the battery cells and the entire battery box, which will affect the performance of the battery device. In response to this, a heat exchange system can be set up in the battery device. Generally speaking, the heat exchange system can set up heat exchange plates at the bottom of the battery cells, modules or on the sides of the battery cells, and through the heat exchange liquid circulation component connected to the heat exchange plate, the heat exchange liquid can circulate in the flow channels of the heat exchange plate, and then repeatedly exchange heat with the battery cells or modules, so that the battery device can work at an appropriate temperature.

[0040] However, in the battery device, there are still certain drawbacks in the related method of setting heat exchange plates between adjacent battery cells, that is, there is a certain thermal resistance in the structure of the heat exchange plate itself, which will affect the heat exchange efficiency between the heat exchange liquid in its own flow channel and the battery cells. In the structural design stage of battery devices with charge and discharge rates of 4C, 6C, 8C or even higher, because such battery devices have a high charge and discharge rate, they are more likely to release more heat during operation. In this way, the heat exchange plate structure of the related technology gradually becomes difficult to match the heat release amount of these battery devices, and there is a risk of reducing the reliability of the battery device.

[0041] At the same time, due to the need to set up a structure of heat exchange plates between adjacent battery cells, it will inevitably occupy a certain amount of box space and increase the overall mass of the battery device, resulting in a decrease in the volume energy density and mass energy density of the battery device.

[0042] When the related technology battery device solves the above problems, it usually considers from two levels: the battery cell level and the battery device level. Among them, at the battery cell level, in order to solve the heat dissipation of the battery cell itself, the design size of the battery cell, the internal structure of the battery cell, the selection of internal positive and negative electrode materials, the selection of high thermal conductivity electrolyte, high thermal conductivity separator film, etc. can be changed. However, such an improvement method is highly challenging to the technology and will greatly increase the manufacturing cost of the battery cell. When considering from the battery device level, a high thermal conductivity adhesive can be used between the battery cell and the heat exchange plate to accelerate the heat transfer between the two. However, with the increase of the heat dissipation rate, the density of the high thermal conductivity adhesive will also increase accordingly, resulting in an increase in the weight of the entire battery device and affecting the mass energy density; at the same time, the bonding strength of the high thermal conductivity adhesive may also decrease, affecting the bonding and fixing of the battery cell.

[0043] Based on the above considerations, in order to solve the problem that the battery device may not be able to operate at an appropriate temperature due to insufficient heat exchange efficiency during use, the inventor has conducted in-depth research and designed a battery device. In this battery device, a colloidal wall is bonded between the first housing walls of two adjacent battery monomers along the first direction in the battery unit, so that the colloidal wall and the current first housing wall together form a heat exchange flow channel, enabling the heat exchange liquid in the heat exchange flow channel to directly contact the first housing wall of the battery monomer for heat exchange.

[0044] In such a battery device, since the heat exchange flow channel is formed by the participation of the first housing wall of the battery monomer, the side wall structure where the heat exchange plate in the related art contacts the housing of the battery monomer can be omitted, enabling the heat exchange liquid to directly contact the first housing wall of the battery monomer for heat exchange. This reduces the influence of the structure of the heat exchange plate on the heat exchange efficiency, saves the volume of the space occupied by the heat exchange plate structure in the box body, reduces the overall mass of the battery device, and can improve the volume energy density and mass energy density of the battery device while enhancing the heat exchange efficiency between the heat exchange liquid and the battery monomer.

[0045] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in electrical equipment such as vehicles, ships, or aircraft. The power supply system of this electrical equipment can be composed of the battery device disclosed in the present application. In this way, it helps to improve the adaptability of the power supply system to the ambient temperature, or when the battery device has high charge and discharge rate performance, it can improve the reliability of the battery device.

[0046] The embodiments of the present application provide an electrical equipment using the battery device as a power source. The electrical equipment can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0047] For the convenience of description, the following embodiments take a vehicle 1000, which is an electrical equipment in an embodiment of the present application, as an example for description.

[0048] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of vehicle 1000 provided by some embodiments of the present application. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000. The battery device 100 can be disposed at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can serve as the operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0049] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0050] Please refer to Figure 2 , Figure 2 Explosion diagram of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes a battery cell 10 and a box body 90. The box body 90 is used to accommodate the battery cell 10.

[0051] Among them, the box body 90 is a component for accommodating the battery cell 10. The box body 90 provides a placement space for a plurality of battery monomers 11 inside the battery cell 10. The box body 90 can adopt various structures. In some embodiments, the box body 90 can include a first part 91 and a second part 92. The first part 91 and the second part 92 are covered with each other. The first part 91 and the second part 92 jointly define an accommodation space for accommodating the battery monomers 11. The second part 92 can be a hollow structure with one end open. The first part 91 can be a plate-like structure. The first part 91 covers the open side of the second part 92 so that the first part 91 and the second part 92 jointly define the accommodation space. The first part 91 and the second part 92 can also both be hollow structures with one side open. The open side of the first part 91 covers the open side of the second part 92. Of course, the box body 90 formed by the first part 91 and the second part 92 can be of various shapes, such as a cylinder, a cuboid, etc.

[0052] The battery cell 11 can be arranged in a placement space. As an example, the battery cell 11 can be, but is not limited to, in the shape of a flat body, a cuboid or other shapes. In the battery device 100, there can be multiple battery cells 11, and the multiple battery cells 11 can be connected in series, in parallel or in a combined series-parallel connection. The combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 11. It can be that multiple battery cells 11 are first connected in series, in parallel or in a combined series-parallel connection to form battery units 10, and then the multiple battery units 10 are connected in series, in parallel or in a combined series-parallel connection to form a whole and are accommodated in the box body 90. It can also be that all the battery cells 11 are directly connected in series, in parallel or in a combined series-parallel connection together, and then the whole formed by all the battery cells 11 is accommodated in the box body 90.

[0053] Among them, 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.

[0054] Please refer to Figure 3 , Figure 3 , which is a schematic exploded view of the battery cell 11 provided in some embodiments of the present application. The battery cell 11 refers to the smallest unit that makes up the battery device 100. As Figure 3 shown, the battery cell 11 includes an end cap 111, a housing 112, a battery core assembly 113 and other functional components.

[0055] The end cap 111 refers to a component that covers the opening of the housing 112 to isolate the internal environment of the battery cell 11 from the external environment. Without limitation, the shape of the end cap 111 can be adapted to the shape of the housing 112 to cooperate with the housing 112. Optionally, the end cap 111 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 111 is not easily deformed when being squeezed or collided, so that the battery cell 11 can have higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 111a can be arranged on the end cap 111. The electrode terminals 111a can be used for electrically connecting with the battery core assembly 113 to output or input the electric energy of the battery cell 11. In some embodiments, a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold value can also be arranged on the end cap 111. The material of the end cap 111 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this. In some embodiments, an insulating member can also be arranged on the inner side of the end cap 111, and the insulating member can be used to isolate the electrical connection components in the housing 112 from the end cap 111 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0056] The housing 112 is a component for cooperating with the end cap 111 to form the internal environment of the battery cell 11. Among them, the formed internal environment can be used to accommodate the battery cell assembly 113, the electrolyte, and other components. The housing 112 and the end cap 111 can be independent components. An opening can be provided on the housing 112, and the end cap 111 is covered at the opening to form the internal environment of the battery cell 11. Without limitation, the end cap 111 and the housing 112 can also be integrated. Specifically, the end cap 111 and the housing 112 can first form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 112, the end cap 111 is then covered on the housing 112. The housing 112 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 112 can be determined according to the specific shape and size of the battery cell assembly 113. The material of the housing 112 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this.

[0057] The battery cell assembly 113 is a component for the battery cell 11 to generate an electrochemical reaction. One or more battery cell assemblies 113 can be included in the housing 112. The battery cell assembly 113 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active substances constitute the main body part of the battery cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active substances respectively constitute the electrode tabs 113a. The positive electrode tab and the negative electrode tab can be located at one end of the main body part together or at both ends of the main body part respectively. During the charging and discharging process of the battery, the positive active substance and the negative active substance react with the electrolyte, and the electrode tab 113a is connected to the electrode terminal to form a current loop.

[0058] According to some embodiments of the present application, please further refer to Figures 1 to 5 , Figure 4 is a schematic diagram of the cooperation of a partial structure of a battery device in some embodiments of the present application from one angle; Figure 5 is Figure 4 a schematic diagram of the cooperation of a partial structure of the battery device shown from another angle.

[0059] The present application provides a battery device 100, which includes a battery unit 10 and a colloidal wall 20. The battery unit 10 includes a plurality of battery cells 11 arranged side by side along the first direction X, and each battery cell 11 includes two first housing walls 1121 arranged opposite to each other along the first direction X. The colloidal wall 20 is bonded between two adjacent first housing walls 1121 of two adjacent battery cells 11 arranged along the first direction X. Among them, the colloidal wall 20 and the current first housing wall 1121 cooperate to form a heat exchange flow channel 101.

[0060] The battery cell 10 includes a plurality of battery cells 11 arranged side by side in the first direction X. That is, in these embodiments of the present application, the battery cell 10 is a structure formed by the battery cells 11 arranged in sequence in the first direction X. Electrical connection between different battery cells 11 can be achieved in series, parallel, or a combination of series and parallel.

[0061] In the embodiments of the present application, a description is made with two battery cells 11 included in a single battery cell 10. Each battery cell 11 includes two first housing walls 1121 arranged opposite to each other in the first direction X, which means that the housing 112 structure of each battery cell 11 has at least two first housing walls 1121 arranged opposite to each other, and in the embodiments of the present application, the direction in which the two first housing walls 1121 are arranged opposite to each other is the first direction X.

[0062] The colloid wall 20 is a component for forming the heat exchange flow path 101 in the battery device 100. In the production design stage of the battery device 100, the colloid wall 20 is designed to be bonded between the first housing walls 1121 of two adjacent battery cells 11 in the first direction X to cooperate with the first housing walls 1121 of the two battery cells 11 to form the heat exchange flow path 101.

[0063] Based on this, during the operation of the battery device 100, heat exchange can be carried out between the heat exchange liquid and the two first housing walls 1121 by the flow of the heat exchange liquid in the heat exchange flow path 101, and then heat absorption or heat release can be performed on the two battery cells 11 on both sides of the heat exchange flow path 101 to adjust the temperature of the battery cells 11 so that the battery cells 11 can operate at an appropriate temperature.

[0064] Exemplarily, in some embodiments, the heat exchange liquid can be arranged to absorb the heat inside the battery cell 11 through the first housing wall 1121 to take away the heat generated by the battery cell 11 during operation; or, in some embodiments, when the ambient temperature during the operation of the battery device 100 is in a low temperature state for a long time, the heat exchange liquid can also be arranged to release heat to the battery cell 11 through the first housing wall 1121 to increase the temperature of the battery cell 11.

[0065] In an embodiment of the present application, the heat exchange flow channel 101 is formed by the colloidal wall 20 and the first housing wall 1121 between adjacent battery monomers 11, so that the heat exchange liquid can directly contact the housing 112 of the battery monomer 11, effectively improving the heat exchange efficiency between the heat exchange liquid and the battery monomer 11. At the same time, such a design of the heat exchange flow channel 101 can also make the structure of the battery unit 10 more compact. Therefore, on the premise that the volume of the box body 90 remains unchanged, more battery monomers 11 can be placed in the placement space of the box body 90, thus improving the volume energy density of the battery device 100. The heat exchange flow channel 101 is formed by the first housing wall 1121 of adjacent battery monomers 11 and the colloidal wall 20, without setting other heat exchange structural parts, which can effectively reduce the overall mass of the battery device 100, and thus improve the mass energy density of the battery device 100.

[0066] The colloidal wall 20 is bonded between two adjacent first housing walls 1121 of two battery monomers 11 arranged adjacent to each other along the first direction X. In some embodiments of the present application, the battery unit 10 includes a plurality of battery monomers 11. Each battery monomer 11 includes two first housing walls 1121 oppositely arranged along the first direction X. The colloidal wall 20 is bonded between two adjacent battery monomers 11 along the first direction X and is bonded to two adjacent first housing walls 1121 between the two battery monomers 11.

[0067] The colloidal wall 20 and the current first housing wall 1121 together form the heat exchange flow channel 101. A possible implementation manner is that, generally, at least two colloidal walls 20 can be arranged between adjacent first housing walls 1121 to cooperate with the two first housing walls 1121 to form a heat exchange flow channel 101 with two open ends. The openings at both ends of the heat exchange flow channel 101 can be used as the inlet and outlet of the heat exchange liquid respectively.

[0068] In some embodiments, there is a connection structure between two adjacent first housing walls 1121. At this time, only one first housing wall 1121 needs to be arranged between the adjacent first housing walls 1121 to form the heat exchange flow channel 101. Exemplarily, between two adjacent battery monomers 11, two adjacent first housing walls 1121 are arranged oppositely along the first direction to form a certain gap therebetween. At the same time, a long strip wall is arranged in the gap, and the long strip wall is connected to the two first housing walls 1121 respectively. At this time, by arranging a colloidal wall 20 spaced from the long strip wall in the gap, the colloidal wall 20 can be used to cooperate with the two first housing walls 1121 and the aforementioned long strip wall to form the heat exchange flow channel 101.

[0069] In the embodiments of the present application, the shape of the colloidal wall 20 can be selected according to actual needs, so that there is sufficient contact area between the heat exchange flow channel 101 formed in cooperation with the first housing wall 1121 and the first housing wall 1121, and the heat exchange requirements of the battery cell 11 can be met. Exemplarily, in these embodiments of the present application, the colloidal wall 20 can be set to be straight strip-shaped or curved strip-shaped.

[0070] It should be noted that in these embodiments of the present application, since the colloidal wall 20 and the first housing wall 1121 are structures that directly contact the heat exchange liquid during the operation of the battery device 100, the forming material of the colloidal wall 20 needs to be selected during the design stage, so that the colloidal wall 20 has good physical and chemical properties after forming.

[0071] In these embodiments of the present application, the forming material of the colloidal wall 20 is mainly selected through the following parameters:

[0072] It is necessary to control that the body tensile strength of the colloidal wall 20 at normal temperature ≥ 5 Mpa, the body tensile strength at an ambient temperature of 60 °C ≥ 3 Mpa, and the body tensile strength after being immersed in the coolant at 85 °C for 1000 h ≥ 5 Mpa;

[0073] It is necessary to control that the shear strength of the colloidal wall 20 at normal temperature (coating AL - coating AL) ≥ 3 Mpa, the shear strength at an ambient temperature of 60 °C (coating AL - coating AL) ≥ 3 Mpa, and the shear strength after being immersed in the coolant at 85 °C for 1000 h (coating AL - coating AL) ≥ 3 Mpa;

[0074] It is necessary to control that the tensile strength of the colloidal wall 20 at normal temperature (coating AL - coating AL) ≥ 3 Mpa, the tensile strength at an ambient temperature of 60 °C (coating AL - coating AL) ≥ 3 Mpa, and the tensile strength after being immersed in the coolant at 85 °C for 1000 h (coating AL - coating AL) ≥ 3 Mpa;

[0075] It is necessary to control that the volume resistivity of the colloidal wall 20 ≥ 10^14 Ω•m.

[0076] Based on this, at least one adhesive such as polyurethane, epoxy resin, acrylate, silicone and silicone - modified silicone, epoxy - modified polyurethane, silicone - modified polyurethane, etc. can be selected, and after curing, the colloidal wall 20 is formed.

[0077] By bonding the colloidal wall 20 between two adjacent first housing walls 1121 of two battery cells 11 arranged adjacent to each other in the first direction X, and using the colloidal wall 20 and the first housing wall 1121 where it is located to jointly form a heat exchange flow channel 101, the heat exchange flow channel 101 is formed by the first housing wall 1121 of the battery cell 11 and the colloidal wall 20 jointly, so that the heat exchange liquid in the heat exchange flow channel 101 can directly contact the first housing wall 1121 of the battery cell 11, which can improve the heat exchange efficiency between the heat exchange liquid and the battery cell 11; the colloidal wall 20 and the first housing wall 1121 jointly form the heat exchange flow channel 101, which can reduce the volume of the battery unit 10 in the first direction X, or arrange more battery cells 11 in the first direction X, thereby improving the volume energy density and mass energy density of the battery device 100.

[0078] According to some embodiments of the present application, the first housing wall 1121 is the large surface of the housing 112 of the battery cell 11.

[0079] The large surface of the housing 112 of the battery cell 11 refers to the embodiment where the housing 112 is a rectangular housing. The housing 112 is jointly surrounded by a bottom wall opposite to the end cover 111 and a plurality of side walls arranged between the end cover 111 and the bottom wall. At this time, there is an area difference between the plurality of side walls of the housing 112, that is, the side walls include two relatively spaced large surfaces and two relatively spaced small surfaces. At this time, the first direction X can be set as the direction in which the two large surfaces are spaced, so that the heat exchange flow channel 101 is formed between two adjacent large surfaces of two battery cells 11.

[0080] Such a setting method can increase the contact area between the heat exchange flow channel 101 and the two battery cells 11, and further improve the heat exchange efficiency between the heat exchange liquid in the heat exchange flow channel 101 and the battery cell 11.

[0081] Please refer to Figures 1 to 7 , Figure 6 , which is a schematic diagram of the cooperation of a part of the structure of the battery device in some embodiments of the present application from one angle; Figure 7 is Figure 6 a schematic diagram of the cooperation of a part of the structure of the battery device shown from another angle. According to some embodiments of the present application, the number of the colloidal walls 20 is multiple, and the multiple colloidal walls 20 are arranged at intervals in sequence along the second direction Y; adjacent colloidal walls 20 and two first housing walls 1121 jointly form a sub-flow channel 1011, and the multiple sub-flow channels 1011 jointly form the heat exchange flow channel 101, and the first direction X intersects with the second direction Y.

[0082] It should be noted that in the embodiment where there are two colloid walls 20, the two colloid walls 20 cooperate with the two first housing walls 1121 to form a sub-channel 1011. At this time, the sub-channel 1011 is the heat exchange channel 101.

[0083] Adjacent colloid walls 20 cooperate with the two first housing walls 1121 to form a sub-channel 1011. Multiple sub-channels 1011 together form the heat exchange channel 101. That is to say, multiple colloid walls 20 cooperate with the two first housing walls 1121 to form multiple independent sub-channels 1011 in the second direction Y, and the heat exchange channel 101 is composed of multiple sub-channels 1011 together.

[0084] In this way, in the large-volume battery cell 11, the area of the first housing wall 1121 increases. At this time, in the embodiment where the heat exchange channel 101 only includes one sub-channel 1011, in order to maintain the heat exchange efficiency between the heat exchange channel 101 and the battery cell 11, it is often necessary to lengthen the distance between the two colloid walls 20 in the second direction Y to increase the contact area between the heat exchange channel 101 and the first housing wall 1121, so as to maintain the heat exchange efficiency between the heat exchange channel 101 and the battery cell 11.

[0085] However, such a setting method greatly increases the volume of the heat exchange channel 101, resulting in a sharp increase in the amount of heat exchange liquid used. And when the heat exchange liquid flows into the heat exchange channel 101 under the action of pressure, it is easy to form an air cavity at the top of the heat exchange channel 101, resulting in the part of the heat exchange channel 101 with an air cavity being unable to exchange heat with the battery cell 11, resulting in uneven heat exchange of the battery cell 11.

[0086] By setting the number of colloid walls 20 as multiple arranged at intervals in the second direction Y in sequence, adjacent colloid walls 20 cooperate with the two first housing walls 1121 to form a sub-channel 1011, and multiple sub-channels 1011 together form the heat exchange channel 101. After the heat exchange liquid flows into each sub-channel 1011 under the action of pressure, the probability of forming an air cavity in each sub-channel 1011 is reduced; and the way that multiple sub-channels 1011 together form the heat exchange channel 101 can also make the heat exchange channel 101 cover most of the area of the first housing wall 1121 through the position design of multiple sub-channels, and can reduce the requirement for the flow rate of the heat exchange liquid on the premise of maintaining the heat exchange efficiency, further improving the heat exchange efficiency and reliability of the battery device 100.

[0087] In these embodiments of the present application, the first direction X intersects with the second direction Y, and can be set such that the first direction X is perpendicular to the second direction Y.

[0088] According to some embodiments of the present application, the multiple colloid walls 20 arranged between the two first housing walls 1121 are arranged at equal intervals in the second direction Y.

[0089] A plurality of colloidal walls 20 are arranged at equal intervals along the second direction Y, aiming to keep the cross-sectional areas of each sub-channel 1011 at various positions in the flow direction of the heat exchange liquid the same after the heat exchange channel 101 is formed. This improves the stability of the heat exchange liquid flowing in each sub-channel 1011, enabling the heat exchange liquid to move at a uniform speed in each sub-channel 1011.

[0090] It should be noted that in the embodiment where the colloidal wall 20 is in a straight strip shape, by controlling the plurality of colloidal walls 20 to be arranged at equal intervals along the second direction Y, the cross-sectional areas of each sub-channel 1011 at various positions in the flow direction of the heat exchange liquid can be kept the same; in the embodiment where a partial structure of the colloidal wall 20 is in a curved strip shape, it can be achieved by controlling the straight strip parts of the plurality of colloidal walls 20 to be arranged at equal intervals along the second direction Y, and staggering the adjacent colloidal walls 20 along the arrangement direction of the straight strip parts, so that the cross-sectional areas of the adjacent colloidal walls 20 at the curved strip parts are the same as those of the straight strip parts.

[0091] According to some embodiments of the present application, the colloidal wall 20 is a polyurethane cured glue, an epoxy resin cured glue, an acrylate cured glue or a silicone cured glue.

[0092] That is to say, in these embodiments of the present application, the colloidal wall 20 can be formed by curing through a polyurethane adhesive, an epoxy resin adhesive, an acrylate adhesive or a silicone adhesive to obtain stable physical and chemical properties.

[0093] Exemplarily, in some embodiments, during the production process of the battery device 100, an adhesive can be first set on the same-side first housing wall 1121 of a plurality of battery monomers 11, and then the plurality of battery monomers 11 are sequentially pressed against each other through the first housing wall 1121, so that the first housing wall 1121 of one battery monomer 11 without the adhesive contacts the first housing wall 1121 of another battery monomer 11 with the adhesive. After the adhesive is cured to form the colloidal wall 20, the adjacent battery monomers 11 can be bonded and fixed through the colloidal wall 20.

[0094] Please refer to Figures 1 to 8 , Figure 8 For Figure 4 an enlarged view of part A of the battery device shown. According to some embodiments of the present application, the battery device 100 further includes a glue-blocking strip 30, which is arranged between two first housing walls 1121 and connected to the colloidal wall 20. The glue-blocking strip 30 is arranged on the side of the colloidal wall 20 close to the heat exchange channel 101, and / or the glue-blocking strip 30 is arranged on the side of the colloidal wall 20 away from the heat exchange channel 101.

[0095] The glue-blocking strip 30 is used to reduce the risk of glue overflow during the curing process of the adhesive and improve the structural reliability of the colloidal wall 20 after molding. At the same time, in some embodiments, the shape of the colloidal wall 20 can also be restricted by the glue-blocking strip 30, so that the colloidal wall 20 is molded into the aforementioned straight strip, curved strip, etc. after curing.

[0096] The glue-blocking strip 30 is arranged between two first housing walls 1121 and connected to the colloidal wall 20, which means that during the molding stage of the colloidal wall 20, the glue-blocking strip 30 can be arranged between two first housing walls 1121, and after the colloidal wall 20 is cured and molded by the adhesive, the glue-blocking strip 30 can be removed to increase the volume of the heat exchange channel 101. Or, in some embodiments, the glue-blocking strip 30 can also be selected to be retained to provide support for the colloidal wall 20 after the colloidal wall 20 is molded, further improving the structural strength of the colloidal wall 20.

[0097] The glue-blocking strip 30 is arranged on the side of the colloidal wall 20 close to the heat exchange channel 101, and / or the glue-blocking strip 30 is arranged on the side of the colloidal wall 20 facing away from the heat exchange channel 101, which means that the glue-blocking strip 30 can select its own installation position according to the molding method of the colloidal wall 20.

[0098] Exemplarily, in some embodiments, the colloidal wall 20 can be molded when the first housing wall 1121 is in a vertical state, that is, the colloidal wall 20 is molded when the first housing wall 1121 is parallel to the gravity direction. At this time, the glue-blocking strip 30 can be first arranged between two first housing walls 1121 along the direction intersecting with the gravity direction, and then the adhesive is arranged on the side of the glue-blocking strip 30 facing away from the gravity direction, so as to use the glue-blocking strip 30 to block the flow of the adhesive and reduce the risk of the adhesive overflowing to the side of the glue-blocking strip 30 facing the gravity direction.

[0099] In some embodiments, the colloidal wall 20 can also be molded when the first housing wall 1121 is in a horizontal state. At this time, two spaced-apart glue-blocking strips 30 can be first arranged on the first housing wall 1121, and a space for placing the adhesive is formed between the two glue-blocking strips 30. In this way, after the adhesive is placed in the space between the two glue-blocking strips 30, the two glue-blocking strips 30 can be respectively used to reduce the risk of the adhesive flowing and overflowing to both sides, and the reliability is better.

[0100] In these embodiments of the present application, the tensile strength of the body of the glue-blocking strip 30 at room temperature can be set to ≥5 Mpa, and at the same time, the tensile strength of the body after being soaked in 85°C coolant for 1000 h is ≥5 Mpa. To improve the structural strength of the glue-blocking strip 30 itself.

[0101] Based on this, the material of the rubber dam 30 can be selected as polyurethane, epoxy resin, acrylic resin, polyethylene, polypropylene or polytetrafluoroethylene; after the colloid wall 20 is cured and formed by the adhesive, the rubber dam 30 may be disposed on one side of the colloid wall 20 close to and / or away from the heat exchange flow channel 101.

[0102] According to some embodiments of the present application, multiple groups of battery units 10 are arranged side by side along the third direction Z. Each battery cell 11 includes two second housing walls 1122 oppositely arranged along the third direction Z. Between adjacent second housing walls 1122, the two second housing walls 1122 are adhesively fixed, and the third direction Z intersects with the first direction X.

[0103] The second housing wall 1122 and the first housing wall 1121 together form the side wall structure of the housing 112 in the battery cell 11. In these embodiments of the present application, two adjacent battery cells 11 along the third direction Z can be adhesively fixed through the second housing wall 1122 to improve the structural stability between multiple groups of battery units 10.

[0104] In these embodiments of the present application, multiple groups of battery units 10 are arranged side by side along the third direction Z to form a battery array. In this battery array, two adjacent battery cells 11 along the third direction Z are adhesively fixed through the second housing wall 1122, and two adjacent battery cells 11 along the first direction X form a heat exchange flow channel 101 through the first housing wall 1121 and the colloid wall 20 therebetween.

[0105] In some embodiments, multiple battery cells 11 can be first adhesively fixed along the third direction X through adjacent second housing walls 1122 to form a column of battery cell groups 11, and then by arranging the colloid wall 20 between adjacent columns of battery cell groups 11, a heat exchange flow channel 101 is formed between adjacent columns of battery cell groups 11, which is beneficial to improving the structural smoothness of each heat exchange flow channel 101 and has higher reliability.

[0106] The two second housing walls 1122 are adhesively fixed. A possible implementation manner is that the two second housing walls 1122 are adhesively fixed through a double-sided tape. The double-sided tape can be composed of a base material and an adhesive film, and it is necessary to control the 180° peel strength of the double-sided tape at room temperature ≥ 8 N / cm, and the 180° peel strength after being soaked in a coolant at 85 °C for 1000 h ≥ 8 N / cm. To improve the bonding strength of the double-sided tape and the corrosion resistance to heat exchange liquid.

[0107] Based on this, the composition of the base material and the adhesive film in the double-sided adhesive can be, but is not limited to, PET (polyethylene terephthalate) + acrylic, PET + silicone, silicone foam + acrylic, PMMA (polymethyl methacrylate) + acrylic, etc., so as to play a role in buffering and fixing between two adjacent battery monomers 11. At the same time, in the structure of the battery device 100, after connecting a plurality of battery monomers 11 arranged along the third direction Z through the double-sided adhesive, the independence between a plurality of heat exchange channels 101 arranged in sequence in the first direction X can be improved, and the possibility of the heat exchange liquid flowing between different heat exchange channels 101 can be reduced.

[0108] Please refer to Figures 1 to 9 , Figure 9 which is a schematic diagram of the cooperation of a partial structure of a battery device according to some embodiments of the present application from an angle. According to some embodiments of the present application, multiple groups of battery units 10 are arranged side by side along the third direction Z, and the heat exchange channels 101 in two adjacent columns of battery monomers 11 arranged along the third direction Z are connected to form a heat exchange branch, and the battery device 100 includes a heat exchange member 40. Among them, the liquid inlet end and the liquid outlet end of each heat exchange branch are respectively connected to the heat exchange member 40.

[0109] The function of the heat exchange member 40 is to exchange heat with the heat exchange liquid, so that the heat exchange liquid can reciprocally circulate between the heat exchange channel 101 and the heat exchange member 40, and then continuously exchange heat with the battery monomer 11.

[0110] Exemplarily, in an embodiment where the heat exchange liquid is used to absorb the heat generated by the battery monomer 11 during operation, the heat exchange liquid can absorb heat, and when flowing through the heat exchange channel 101, transfer the heat generated by the battery monomer 11 during operation to the heat exchange liquid through the first housing wall 1121, so that the temperature of the heat exchange liquid itself becomes higher, and then flows out of the heat exchange channel 101 through the liquid outlet end and flows to the heat exchange member 40. At this time, the heat exchange member 40 exchanges heat with the heat exchange liquid to absorb the heat of the heat exchange liquid, so that the temperature of the heat exchange liquid drops and then flows into the heat exchange channel 101 again through the liquid inlet end, and then continues to absorb the heat released by the battery monomer 11.

[0111] In the third direction Z, after a plurality of heat exchange channels 101 in two adjacent columns of battery monomers 11 are connected to form a heat exchange branch, in these embodiments of the present application, the number of heat exchange branches is at least one, and the number of heat exchange branches can be freely selected according to needs.

[0112] The liquid inlet end and the liquid outlet end of each heat exchange branch are respectively connected to the heat exchange member 40, so that the heat exchange liquid can circulate between the heat exchange branch and the heat exchange member 40, and further enable the heat exchange liquid to continuously exchange heat with the battery cells 11, and finally make the battery cells 11 work at a suitable temperature. In an embodiment where the number of heat exchange branches is multiple, it can be set that the heat exchange member 40 includes a body portion 41, a liquid inlet main pipe 42 and a liquid outlet main pipe 43. The liquid inlet main pipe 42 and the liquid outlet main pipe 43 are respectively connected to the body portion 41, and multiple heat exchange branches are connected in parallel between the liquid inlet main pipe 42 and the liquid outlet main pipe 43. In this way, after the heat exchange liquid undergoes heat exchange in the body portion 41 to reach a suitable temperature, it flows out through the liquid inlet main pipe 42 and is branched at the liquid inlet main pipe 42 to flow into each heat exchange branch respectively. After exchanging heat with two adjacent rows of battery cell groups 11 in each heat exchange branch, it converges to the liquid outlet main pipe 43 and flows through the liquid outlet main pipe 43 to the body portion 41 for heat exchange, and so on in a cycle. Finally, each battery cell 11 in the battery device 100 can work at a suitable temperature.

[0113] According to some embodiments of the present application, the battery device 100 further includes a sealing wall 50. The sealing wall 50 is connected to the colloid wall 20 and is arranged at the inlet end and the outlet end of the heat exchange flow channel 101. The sealing wall 50 is annular, and the colloid wall 20 is located on the side of the sealing wall 50 close to the heat exchange flow channel 101.

[0114] The function of the sealing wall 50 is to seal at the connection positions between each heat exchange branch and the aforementioned liquid inlet main pipe 42, and between each heat exchange branch and the aforementioned liquid outlet main pipe 43, reducing the risk of leakage of the heat exchange liquid at these two connection positions.

[0115] The sealing wall 50 is arranged at the inlet end and the outlet end of the heat exchange flow channel 101, which means that in an embodiment where the heat exchange branch only includes one section of the heat exchange flow channel 101, this section of the heat exchange flow channel 101 is the heat exchange branch. The inlet end of the heat exchange flow channel 101 is connected to the liquid inlet main pipe 42, and the outlet end of the heat exchange flow channel 101 is connected to the liquid outlet main pipe 43. At this time, the sealing wall 50 is arranged at the inlet end and the outlet end of the heat exchange flow channel 101 to increase the sealing performance at the connection between the heat exchange flow channel 101 and the liquid inlet main pipe 42, and at the connection between the heat exchange flow channel 101 and the liquid outlet main pipe 43.

[0116] In an embodiment of the present application where the heat exchange branch includes multiple sections of the heat exchange flow channel 101, the sealing wall 50 is arranged on the two heat exchange flow channels 101 at both ends of the heat exchange branch to respectively increase the sealing performance between the heat exchange branch and the liquid inlet main pipe 42 and the liquid outlet main pipe 43 at both ends. The sealing wall 50 is annular, and the colloid wall 20 is located on the side of the sealing wall 50 close to the heat exchange flow channel 101 to wrap the heat exchange flow channel 101, reducing the risk of leakage of the heat exchange liquid in the heat exchange flow channel 101.

[0117] According to some embodiments of the present application, the sealing wall 50 is a polyurethane curing adhesive, an epoxy resin curing adhesive, an acrylate curing adhesive, or a silicone curing adhesive.

[0118] That is, the molding material of the sealing wall 50 is selected to be the same as that of the colloidal wall 20, both of which are formed by adhesives such as polyurethane, epoxy resin, acrylate, silicone, silicone-modified silicone, epoxy resin-modified polyurethane, or silicone-modified polyurethane after curing, which can improve the structural consistency between the sealing wall 50 and the colloidal wall 20, and further improve the reliability of the battery device 100.

[0119] According to some embodiments of the present application, the first housing wall 1121 is provided with an anti-corrosion coating 60, and the orthographic projection of the heat exchange flow channel 101 on the first housing wall 1121 completely falls within the orthographic projection of the anti-corrosion coating 60 on the first housing wall 1121.

[0120] The anti-corrosion coating 60 is provided on the first housing wall 1121 to improve the corrosion resistance of the first housing wall 1121 to the heat exchange liquid. In these embodiments of the present application, the initial adhesion of the anti-corrosion coating 60 can be controlled to be grade 0; the adhesion is grade 0 after being soaked in 85°C coolant for 1000 h. At the same time, the initial volume resistivity of the anti-corrosion coating 60 can also be controlled to be ≥1014 Ω•m; the volume resistivity is ≥1014 Ω•m after being soaked in 85°C coolant for 1000 h.

[0121] In these embodiments of the present application, the material of the anti-corrosion coating 60 can be selected as polyurethane or epoxy resin.

[0122] According to some embodiments of the present application, the present application further provides an electrical device, which includes the battery device 100 provided in any of the foregoing embodiments, and the battery device 100 is used to provide electrical energy. The electrical device can be any of the foregoing devices or systems using the battery device.

[0123] According to some embodiments of the present application, please refer to Figures 1 to 9 , the present application provides a battery device 100, which includes a battery unit 10, a colloidal wall 20, a rubber dam 30, a heat exchange member 40, and a sealing wall 50. The battery unit 10 includes a plurality of battery monomers 11 arranged side by side along the first direction X, and each battery monomer 11 includes two first housing walls 1121 arranged opposite to each other along the first direction X; the colloidal wall 20 is bonded between two adjacent first housing walls 1121 of two adjacent battery monomers 11 arranged along the first direction X; wherein, the colloidal wall 20 and the current first housing wall 1121 cooperate to form a heat exchange flow channel 101.

[0124] The glue-blocking strip 30 is arranged between two first housing walls 1121 and connected to the colloid wall 20 to reduce the risk of adhesive overflow during the molding process of the colloid wall 20 and assist in the molding of the colloid wall 20.

[0125] The heat exchange member 40 is used to communicate with a plurality of heat exchange branches through the liquid inlet main pipe 42 and the liquid outlet main pipe 43 respectively, so that the heat exchange liquid can circulate between the main body part 41 and each heat exchange branch, continuously exchange heat with the battery cells 11, and enable each battery cell 11 to work at a suitable temperature.

[0126] The sealing wall 50 is connected to the colloid wall 20 and arranged at the inlet end and the outlet end of the heat exchange flow channel 101 to seal the connection positions of each heat exchange branch with the aforementioned liquid inlet main pipe 42 and the connection positions of each heat exchange branch with the aforementioned liquid outlet main pipe 43, reducing the risk of heat exchange liquid leakage at these two connection positions.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A battery unit, comprising a plurality of battery cells arranged side by side along a first direction; each of the battery cells comprises two first housing walls arranged opposite to each other along the first direction; A colloid wall is bonded between two first shell walls close to each other in two battery cells arranged adjacently along the first direction; The colloid wall cooperates with the first shell wall currently located therein to form a heat exchange channel.

2. The battery device according to claim 1, characterized in that: The first housing wall is a large surface of the housing of the battery cell.

3. The battery device according to claim 1, characterized in that: There are multiple colloid walls, and the multiple colloid walls are sequentially spaced apart along the second direction; The adjacent colloid walls cooperate with the two first shell walls to form a sub-channel, and a plurality of the sub-channels together constitute the heat exchange channel, and the first direction intersects with the second direction.

4. The battery device according to claim 3, characterized in that: The plurality of colloid walls disposed between the two first shell walls are arranged at equal intervals along the second direction.

5. The battery device according to claim 1, characterized in that: The colloid wall is polyurethane curing glue, epoxy resin curing glue, acrylate curing glue or silicone curing glue.

6. The battery device according to claim 1, characterized in that: The battery device further comprises: The rubber baffle is arranged between the two first shell walls and connected to the colloid wall. The rubber baffle is arranged on a side of the colloid wall close to the heat exchange channel, and / or the rubber baffle is arranged on a side of the colloid wall away from the heat exchange channel.

7. The battery device according to claim 1, characterized in that: A plurality of groups of battery cells are arranged side by side along a third direction, each battery cell comprises two second shell walls arranged opposite to each other along the third direction, two second shell walls are glued and fixed between adjacent second shell walls, and the third direction intersects with the first direction.

8. The battery device according to claim 1, characterized in that: A plurality of groups of battery cells are arranged side by side along a third direction, the heat exchange channels in two adjacent rows of battery cells along the third direction are connected to form a heat exchange branch, and the battery device includes a heat exchange element; Wherein, the liquid inlet end and the liquid outlet end of each heat exchange branch are respectively connected to the heat exchange element.

9. The battery device according to claim 1, characterized in that: The battery device further comprises: The sealing wall is connected to the colloid wall and is arranged at the inlet and outlet ends of the heat exchange channel. The sealing wall is annular, and the colloid wall is located on one side of the sealing wall close to the heat exchange channel.

10. The battery device according to claim 9, characterized in that: The sealing wall is polyurethane curing glue, epoxy resin curing glue, acrylate curing glue or silicone curing glue.

11. The battery device according to claim 1, characterized in that: The first shell wall is provided with an anti-corrosion coating, and the orthographic projection of the heat exchange channel onto the first shell wall completely falls within the orthographic projection of the anti-corrosion coating onto the first shell wall.

12. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 11, wherein the battery device is used to provide electrical energy.

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