Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a battery box, a first heating piece and an exhaust valve, the battery box comprises a box body and a cover body, the first heating piece is installed on the cover body, and the exhaust valve is installed on the box body and / or the cover body. According to the battery device, the first heating piece is mounted on the cover body, the interior of the battery box can be heated through the first heating piece, condensate water can be evaporated into water vapor, and then the water vapor can be discharged out of the battery box through the exhaust valve, so that the risk of short circuit of the battery device is reduced, and the safety of the battery device is improved; moreover, the first heating element is assembled on the cover body, so that the assembling difficulty of the first heating element can be reduced, the assembling efficiency is improved, and the production cost is reduced.

Description

Technical Field

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

[0002] In the related art, a cooling assembly with a cooling function is often arranged in the battery pack. During the process of the cooling assembly cooling the battery cell, condensation water is easily generated on the cooling assembly. In addition, in an environment with high humidity and large temperature difference between day and night, condensation water is easily generated inside the battery pack. Condensation water can easily cause a short circuit in the battery pack, endangering the safety of the battery pack and even causing safety accidents. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a battery device that can better remove condensed water in the battery box, thereby improving the safety of the battery device.

[0004] The present application also aims to provide an electrical device having a battery device.

[0005] According to the battery device of the first aspect embodiment of the present application, the battery device includes: a battery box, a first heating element and an exhaust valve, the battery box includes a box body and a cover body, the first heating element is installed on the cover body, and the exhaust valve is installed on the box body and / or the cover body.

[0006] In the above example, a first heating element is installed on the cover body, and the interior of the battery box can be heated by the first heating element, so that condensed water can be evaporated into water vapor, and then the water vapor can be discharged to the outside of the battery box through the exhaust valve, thereby reducing the risk of short circuit in the battery device, thereby improving the safety of the battery device, and the first heating element is assembled on the cover body, which can reduce the difficulty of assembling the first heating element, improve assembly efficiency, and thus reduce production costs.

[0007] In some embodiments of the present application, the first heating element is installed on the inner surface of the cover.

[0008] In the above example, by installing the first heating element on the inner surface of the cover body, the assembly of the first heating element is simple and convenient, and the first heating element can be well inspected and repaired, and the first heating element can be replaced or repaired in a relatively timely manner.

[0009] In some embodiments of the present application, the battery device further includes: a bonding member, and the first heating member is mounted on the inner surface of the cover body through the bonding member.

[0010] In the above example, the adhesive can make the first heating element fit tightly with the cover. Compared with other connection methods, this installation method is simpler and can save assembly time and cost. In addition, the adhesive has good stability and reliability. Even when the battery device experiences long-term vibration, high and low temperature changes and other complex working conditions, it can always keep the first heating element fixed and ensure the stable operation of the battery device.

[0011] In some embodiments of the present application, the cover body includes a first layer plate and a second layer plate which are stacked, and at least a portion of the first heating element is installed between the first layer plate and the second layer plate.

[0012] In the above example, at least part of the first heating element is installed between the first and second layers of the cover, which can provide relatively stable protection for the first heating element, effectively prevent the first heating element from being damaged by external collision or extrusion, and extend its service life. At the same time, this installation method further optimizes the heat transfer path, allowing the heat to diffuse evenly between the two layers of the plate, and then more efficiently transfer to the battery box, improving the overall heating effect.

[0013] In some embodiments of the present application, the first heating element includes a heating body and an electrical connector, the heating body is located between the first layer board and the second layer board, and at least part of the electrical connector extends from between the first layer board and the second layer board.

[0014] In the above example, by placing the heater between the first plate and the second plate, a good heating effect is ensured and the heater is better protected, thereby ensuring the stability and reliability of the overall operation of the battery device and improving the overall performance of the battery system.

[0015] In some embodiments of the present application, the battery device further includes: a battery cell assembly, the battery cell assembly including a plurality of battery cells and a bus, each of the battery cells being provided with a pole on a side close to the cover, the bus connecting the poles of two adjacent battery cells.

[0016] In the above example, by arranging the poles of the battery cells on the side close to the battery cells close to the cover, the first heating element can better heat the poles, bus bars and the air near the poles and bus bars, thereby reducing the risk of short circuit of the battery cell assembly caused by condensed water and moisture in the battery pack.

[0017] In some embodiments of the present application, at least a portion of the first heating element is arranged opposite to the bus, wherein the first heating element is spaced apart from the bus, and / or the surface of the first heating element facing the bus has an insulating layer.

[0018] In the above example, by arranging the first heating element relative to the bus, the distance between the first heating element and the bus can be made closer, so that the bus and the air near the bus can be better heated, so that the condensed water near the bus can be better evaporated, and the humidity near the pole and the bus can be better reduced, thereby reducing the risk of short circuit of the battery cell assembly caused by condensed water and moisture in the battery pack.

[0019] In some embodiments of the present application, the first heating element includes a heating plate, the area of ​​the heating plate is S1, and the area of ​​the battery cell assembly facing the cover is S2, satisfying: 1 / 3≤S1 / S2≤1.

[0020] In the above example, by satisfying the above area ratio, the heating plate can be saved while the effect of the heating plate in reducing the overall humidity in the battery box can be better ensured, thereby reducing the cost of the first heating element to a certain extent.

[0021] In some embodiments of the present application, a plurality of the battery cells are arranged in sequence along a first direction to form a battery cell column, the battery cell column is arranged in at least two columns in a second direction, each of the battery cell columns has a pole column, and the pole column is composed of a plurality of the poles arranged at intervals along the first direction, wherein the first heating element includes a plurality of heating plates, each of the heating plates is arranged above at least one of the pole columns, and the first direction and the second direction are perpendicular to each other.

[0022] In the above example, by arranging the first heating element, the humidity near the pole and the busbar can be reduced to a better extent, thereby reducing the risk of short circuit of the battery cell assembly caused by condensed water and moisture in the battery pack.

[0023] In some embodiments of the present application, the battery device further includes a heat exchange member, which is arranged on a surface of the battery cell assembly where the pole is arranged, and the first heating member is arranged opposite to the heat exchange member.

[0024] In the above example, by arranging the heat exchange element on the surface of the battery cell assembly where the bus is arranged, the distance between the first heating element and the heat exchange element is closer. In this way, the condensed water on the surface of the heat exchange element can be better removed by heating through the first heating element, thereby reducing the risk of short circuit of the battery cell assembly caused by condensed water and moisture in the battery pack.

[0025] In some embodiments of the present application, the heat exchange element and the pole are arranged spaced apart along a first direction and / or a second direction, and the first direction and the second direction are perpendicular to each other.

[0026] In the above example, by separating the heat exchange element from the busbar, it is possible to better avoid the heat exchange element or condensed water generated on the heat exchange element from causing electrical connection between two adjacent busbars, thereby reducing the risk of short circuit in the battery cell assembly.

[0027] In some embodiments of the present application, a plurality of battery cells are stacked in sequence along a first direction to form a battery cell column, and the battery cell column is arranged in at least two columns in a second direction, each of the battery cell columns has a pole column, and the pole column is composed of a plurality of poles arranged at intervals along the first direction, and the heat exchange element includes: a first heat exchange section, the first heat exchange section extends along the first direction, and in the second direction, the first heat exchange section is located on at least one side of the pole column, and the first direction and the second direction are perpendicular to each other.

[0028] In the above example, by locating the first heat exchange section on at least one side of the pole column, the battery cell assembly can be better heat exchanged, so that the battery cell assembly is always at a good operating temperature, which is beneficial to improving the operating performance of the battery cell assembly.

[0029] In some embodiments of the present application, the first heating element includes: a first heating section, the first heating section extends along the first direction, and the first heating section is arranged corresponding to the first heat exchange section.

[0030] In the above example, by arranging the first heating section and the first heat exchange section correspondingly, the first heating section can better heat the first heat exchange section, so that the condensed water generated on the first heat exchange section can be better evaporated, which can reduce the risk of the condensed water causing the battery cell assembly to short-circuit.

[0031] In some embodiments of the present application, in the first direction, the length of the first heat exchange section is L1, and the length of the first heating section is L2, satisfying: 1 / 3≤L2 / L1≤1; and / or, in the second direction, the width of the first heat exchange section is W1, and the width of the first heating section is W2, satisfying: 1 / 3≤W2 / W1≤1.

[0032] In the above example, by setting the length and width of the first heat exchange section and the length and width of the first heating section, the effect of removing condensed water on the first heat exchange section by the first heating section can be better achieved.

[0033] In some embodiments of the present application, the heat exchange element further includes: at least one second heat exchange segment, the second heat exchange segment extends along the second direction, and in the first direction, the second heat exchange segment is connected to the end of the first heat exchange segment in the first direction.

[0034] In the above example, by arranging the first heat exchange section and the second heat exchange section, the heat exchange effect of the heat exchange component on the battery cell assembly can be improved, so that the battery cell assembly is at a more suitable operating temperature, which is beneficial to the operating performance of the battery cell assembly.

[0035] In some embodiments of the present application, the first heating element includes: a second heating section, the second heating section extends along the second direction, and the second heating section is arranged corresponding to the second heat exchange section.

[0036] In the above example, by arranging the second heating section and the second heat exchange section correspondingly, the second heating section can better heat the second heat exchange section, so that the condensed water generated on the second heat exchange section can be better evaporated, which can reduce the risk of the condensed water causing the battery cell assembly to short-circuit.

[0037] In some embodiments of the present application, in the second direction, the length of the second heat exchange section is L3, and the length of the second heating section is L4, satisfying: 1 / 3≤L4 / L3≤1; and / or, in the first direction, the width of the second heat exchange section is W3, and the width of the second heating section is W4, satisfying: 1 / 3≤W4 / W3≤1.

[0038] In the above example, by setting the length and width of the second heat exchange section and the length and width of the second heating section, the effect of removing condensed water on the second heat exchange section by the second heating section can be better achieved.

[0039] In some embodiments of the present application, the heat exchange element includes a heat exchange tube, or the heat exchange element includes a heat exchange plate, and the heat exchange plate has a heat exchange channel therein.

[0040] In the above example, the heat exchange tube and the heat exchange plate have simple structures, and can effectively exchange heat for the battery cell assembly, so that the battery cell assembly is at a more suitable operating temperature, which is beneficial to the operating performance of the battery cell assembly.

[0041] In some embodiments of the present application, the battery device further includes: a second heating element, which is arranged on at least one side of the battery cell assembly in a first direction and / or a second direction, and the first direction and the second direction are perpendicular to each other.

[0042] In the above example, by providing the second heating element, it is not only beneficial to evaporate the condensed water and reduce the humidity in the battery box, but also beneficial to the cold start of the battery device.

[0043] In some embodiments of the present application, the box body includes a frame and a bottom plate, the frame is constructed as a ring extending along the outer periphery of the bottom plate, the frame and the outer periphery of the bottom plate are connected to construct a accommodating cavity with an opening, the cover body is covered at the opening, and the exhaust valve is installed on the frame.

[0044] In the above example, the battery box composed of the frame, the bottom plate and the cover can better resist external impact and pressure, thereby better providing the safety and reliability of the battery device.

[0045] In some embodiments of the present application, the box body also includes a beam body, which is installed in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity and a second accommodating cavity, the battery cell assembly is installed in the first accommodating cavity, and the exhaust valve is installed on the frame corresponding to the second accommodating cavity.

[0046] In the above example, the beam separates the accommodating chamber into a first accommodating chamber and a second accommodating chamber, and the battery cell assembly is installed in the first accommodating chamber, which is conducive to the assembly of the battery cell assembly. At the same time, the beam also plays a role in reinforcing the box body, further improving the structural strength of the box body. The exhaust valve is installed on the frame corresponding to the second accommodating chamber. When the first heating element or even the second heating element is heated, moisture can first be gathered and buffered in the second accommodating chamber, and then discharged by the exhaust valve, which can make the exhaust process more efficient and stable, and is conducive to improving the safety and reliability of the battery device.

[0047] In some embodiments of the present application, the exhaust valve includes a valve body and a humidity sensor mounted on the valve body.

[0048] In the above example, by integrating the humidity sensor on the valve body, the difficulty of assembly can be reduced, and it can also be beneficial to the discharge of moisture in the box.

[0049] In some embodiments of the present application, the valve body is a one-way valve.

[0050] In the above example, by making the valve body a one-way valve, moisture in the battery box can be continuously discharged from the valve body, and the gas generated when the battery cell assembly is running can also be discharged through the valve body, which is beneficial to the operation of the battery device.

[0051] According to the electrical device of the second aspect of the present application, the electrical device includes a battery device, and the battery device is used to store or provide electrical energy.

[0052] In the above example, by providing the battery device of the above example, the electrical device of the present application can have higher reliability and good safety.

[0053] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0055] Figure 1 A schematic diagram of a structure in which the electric device provided in some embodiments of the present application is a vehicle;

[0056] Figure 2 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0057] Figure 3 This is a schematic structural diagram of a first heating element and a cover body in some embodiments of the present application;

[0058] Figure 4 This is a schematic structural diagram of a first heating element and a cover body in some embodiments of the present application;

[0059] Figure 5 An exploded view of a first heating element and a cover body according to some embodiments of the present application;

[0060] Figure 6 This is a schematic structural diagram of a cover body and a first heating element in some embodiments of the present application;

[0061] Figure 7 An exploded view of a cover body and a first heating element according to some embodiments of the present application;

[0062] Figure 8 A schematic diagram of a battery device with a cover removed according to some embodiments of the present application;

[0063] Fig. 9 is an exploded view of a battery device according to some embodiments of the present application;

[0064] Fig.10 is an exploded view of a battery device with a cover removed according to some embodiments of the present application;

[0065] Fig.11 An exploded view of a battery device according to some embodiments of the present application;

[0066] Fig.12 An exploded view of a battery device with a cover removed according to some embodiments of the present application;

[0067] Fig.13 A schematic diagram of a battery device with a cover removed according to some embodiments of the present application;

[0068] Fig.14 for Fig.13 A magnified image of area A;

[0069] Fig.15 for Figure 8 Enlarged view of area B;

[0070] Fig.16 A schematic diagram of the structure of a battery device according to some embodiments of the present application;

[0071] Fig.17 for Fig.16 Magnified view of area C.

[0072] Reference numerals:

[0073] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0074] 1. Battery box; 11. Box body; 111. Frame; 112. Bottom plate; 113. Beam body; 12. Cover body; 121. First layer plate; 122. Second layer plate;

[0075] 2. first heating element; 21. heating body; 22. electrical connector; 23. heating plate; 24. first heating section; 25. second heating section;

[0076] 3. Exhaust valve; 31. Valve body; 32. Humidity sensor; 33. Exhaust hole;

[0077] 4. Battery cell assembly; 41. Battery cell; 411. Terminal column; 42. Bus bar;

[0078] 5. heat exchange element; 51. first heat exchange section; 52. second heat exchange section;

[0079] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0080] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0081] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0082] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0083] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0084] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0085] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0086] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0087] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0088] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include one or more battery cells. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0089] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0090] In some embodiments, the battery device may be a battery pack, which includes a battery box and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the battery box.

[0091] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in a battery box by fixing the battery module in the battery box.

[0092] As an example, the battery cell assembly may also be housed in the battery box by directly fixing a plurality of battery cells to the battery box.

[0093] As an example, the battery box can be used as part of the chassis structure of the vehicle. For example, the top cover of the battery box can become at least a part of the floor of the vehicle, or the frame of the battery box can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0094] In some embodiments, the battery device refers to an energy storage device, which includes a battery box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0095] The battery cells mentioned in the embodiments of the present application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., which are not limited in the embodiments of the present application. The battery cells may be cylindrical, flat, rectangular or other shapes, etc., which are not limited in the embodiments of the present application. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which are not limited in the embodiments of the present application.

[0096] Exemplarily, a battery cell may generally include a shell, a battery cell assembly and an electrolyte, wherein the shell is used to contain the battery cell assembly and the electrolyte, and the shell is provided with at least one positive electrode column and at least one negative electrode column. The battery cell assembly includes one or more electrode assemblies, and the electrode assembly is formed by stacking or winding a positive electrode sheet, a negative electrode sheet and a separator.

[0097] Among them, the positive electrode sheet can generally include a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is directly or indirectly coated on the positive electrode current collector, the positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, the positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab sheet, and a plurality of positive electrode tab sheets are stacked together and electrically connected to the positive electrode column. Exemplarily, the plurality of stacked positive electrode tab sheets can be directly welded to the positive electrode column to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter sheet, the plurality of stacked positive electrode tab sheets are welded to one end of the positive electrode adapter sheet, and the other end of the positive electrode adapter sheet is welded to the positive electrode column, so that the positive electrode tab sheet is electrically connected to the positive electrode column.

[0098] The negative electrode sheet can generally include a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is directly or indirectly coated on the negative electrode current collector, the negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer, the negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab sheet, and a plurality of negative electrode tab sheets are stacked together and electrically connected to the negative electrode column. Exemplarily, a plurality of negative electrode tab sheets stacked together can be directly welded to the negative electrode column to form an electrical connection; or, the battery cell assembly can also include a negative electrode adapter sheet, a plurality of negative electrode tab sheets stacked together are welded to one end of the negative electrode adapter sheet, and the other end of the negative electrode adapter sheet is welded to the negative electrode column, so that the negative electrode tab sheet is electrically connected to the negative electrode column. The material of the separator is not limited, for example, it can be polypropylene or polyethylene.

[0099] At the same time, battery cells mainly rely on the movement of metal ions between the positive electrode and the negative electrode to work. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, the material of the positive electrode active material layer can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc., the material of the negative electrode current collector can be copper, and the material of the negative electrode active material layer can be carbon or silicon, etc. During the charge and discharge process, Li+ is embedded and de-embedded back and forth between the two electrodes: when charging, Li+ is de-embedded from the positive electrode, embedded in the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

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

[0101] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and important role. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of energy density and reliability.

[0102] In the related art, a cooling assembly with a cooling function is often arranged in the battery pack. During the process of the cooling assembly cooling the battery cell, condensation water is easily generated on the cooling assembly. In addition, in an environment with high humidity and large temperature difference between day and night, condensation water is easily generated inside the battery pack. Condensation water can easily cause a short circuit in the battery pack, endangering the safety of the battery pack and even causing safety accidents.

[0103] Based on the above considerations, in order to improve the safety of the battery device, the applicant has designed a battery device after in-depth research, in which a first heating element is installed on the cover body. The first heating element can heat the inside of the battery box, and the condensed water can be evaporated into water vapor. Then the water vapor can be discharged to the outside of the battery box through the exhaust valve, thereby reducing the risk of short circuit in the battery device, thereby improving the safety of the battery device. In addition, the first heating element is assembled on the cover body, which can reduce the difficulty of assembling the first heating element, improve the assembly efficiency, and thus reduce the production cost.

[0104] The embodiment of the present application provides an electric device using the battery cell of the present disclosure as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0105] For the convenience of description, the following embodiments take the electric device as a vehicle 1000 as an example to introduce the structures of the electric device, the battery device 100 and the battery cell 41 of the present application in detail.

[0106] Please refer to Figure 1 , Figure 1The power device provided for some embodiments of the present application is a structural schematic diagram of a vehicle 1000. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle 1000 is provided with a battery device 100, and the battery device 100 may be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used for powering the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving. In some embodiments of the present application, the battery device 100 may be used not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0107] A battery device 100 according to an embodiment of the first aspect of the present application is described below with reference to the drawings.

[0108] Please refer to Figure 2 , Figure 2 This is an exploded view of the structure of the battery device 100 provided in some embodiments of the present application.

[0109] In some embodiments of the present application, the battery device 100 includes a battery box 1, a first heating element 2 and an exhaust valve 3, the battery box 1 includes a box body 11 and a cover body 12, the first heating element 2 is installed on the cover body 12, and the exhaust valve 3 is installed on the box body 11 and / or the cover body 12.

[0110] That is to say, when condensed water is generated in the battery box 1, the first heating element 2 can be heated so that the condensed water is heated into water vapor. At this time, the air pressure in the battery box 1 increases, and the gas can be discharged from the exhaust valve 3 to the outside of the battery box 1. The water vapor can be discharged to the outside of the battery box 1 along with the gas, thereby effectively reducing the humidity in the battery box 1 and effectively reducing the risk of short circuit in the battery device 100, thereby improving the safety of the battery device 100.

[0111] Furthermore, the area of ​​the cover body 12 is relatively large. On the one hand, the first heating element 2 can be better installed on the cover body 12, and the assembly is simple and convenient. Moreover, the position of the first heating element 2 can be arranged according to actual needs. For example, the first heating element 2 can be arranged at a position in the battery box 1 where condensed water is more likely to appear, so that the first heating element 2 can better heat the condensed water into water vapor, further reducing the risk of short circuit in the battery device 100. Moreover, by arranging the size of the first heating element 2 according to actual needs, the size of the first heating element 2 can be saved, thereby reducing the cost of arranging the first heating element 2, and further reducing the cost of the battery device 100.

[0112] In addition, the first heating element 2 is installed on the cover 12 to heat the battery cell assembly 4 in the battery box 1. When the battery device 100 is in a low temperature environment, the temperature of the battery cell assembly 4 can be well increased, the performance of the battery cell assembly 4 can be improved, and the battery device 100 can be well guaranteed to output electric energy stably under cold conditions.

[0113] Exemplarily, the first heating element 2 can be installed on the inner surface of the cover body 12, or the first heating element 2 can be installed inside the cover body 12. If the first heating element 2 is installed inside the cover body 12, when the first heating element 2 heats, the heat can be evenly transferred toward the inside of the battery box 1 through the cover body 12.

[0114] Exemplarily, the exhaust valve 3 can be installed on the box body 11, the exhaust valve 3 can also be installed on the cover body 12, or the exhaust valve 3 can be installed on both the box body 11 and the cover body 12. The exhaust valve 3 can be used to better discharge moisture in the battery box 1.

[0115] For example, taking the battery device 100 as an example, the first heating element 2 can be activated for heating when the vehicle 1000 is parked or stopped, or the first heating element 2 can be activated when the battery cell assembly 4 stops running.

[0116] In the above example, the first heating element 2 is installed on the cover body 12, and the interior of the battery box 1 can be heated by the first heating element 2, and the condensed water can be evaporated into water vapor, and then the water vapor can be discharged to the outside of the battery box 1 through the exhaust valve 3, thereby reducing the risk of short circuit in the battery device 100, thereby improving the safety of the battery device 100, and the first heating element 2 is assembled on the cover body 12, which can reduce the difficulty of assembling the first heating element 2, improve the assembly efficiency, and thus reduce the production cost.

[0117] Please refer to Figure 3 , Figure 3 It is a schematic structural diagram of the first heating element 2 and the cover body 12 of some embodiments of the present application.

[0118] Please refer to Figure 4 , Figure 4 It is a schematic structural diagram of the first heating element 2 and the cover body 12 of some embodiments of the present application.

[0119] Please refer to Figure 5 , Figure 5 This is an exploded view of the first heating element 2 and the cover body 12 of some embodiments of the present application.

[0120] In some embodiments of the present application, Figure 2-Figure 5 As shown, the first heating element 2 is installed on the inner surface of the cover body 12.

[0121] Exemplarily, the first heating element 2 can be installed on the inner surface of the cover body 12 by a detachable assembly method, such as riveting, bonding, etc., thereby, the first heating element 2 can be disassembled and assembled well, so that the first heating element 2 can be replaced or repaired.

[0122] Exemplarily, the first heating element 2 can also be installed on the inner surface of the cover body 12 by a non-detachable assembly method, such as welding, etc., thereby improving the connection strength between the first heating element 2 and the cover body 12, so that the first heating element 2 can heat stably.

[0123] Exemplarily, the cover 12 can be connected to the box body 11 in a detachable manner, whereby the first heating element 2 can be better inspected and maintained by removing the cover 12, which can reduce the difficulty of inspection and maintenance, and the first heating element 2 can be replaced or repaired more timely.

[0124] For example, during assembly, the first heating element 2 may be pre-installed on the cover 12 , and then the cover 12 may be installed on the box 11 . The assembly method is simple and convenient.

[0125] In the above example, by installing the first heating element 2 on the inner surface of the cover body 12, the assembly of the first heating element 2 is simple and convenient, and the first heating element 2 can be well inspected and repaired, and the first heating element 2 can be replaced or repaired more timely.

[0126] In some embodiments of the present application, Figure 3 and Figure 4 As shown, the battery device 100 further includes: an adhesive member, and the first heating member 2 is mounted on the inner surface of the cover body 12 through the adhesive member.

[0127] Exemplarily, the first heating element 2 may be bonded to the inner surface of the cover body 12 by means of double-sided tape.

[0128] Exemplarily, the first heating element 2 may be bonded to the inner surface of the cover body 12 by means of structural adhesive.

[0129] In the above example, the adhesive can make the first heating element 2 fit tightly with the cover 12. Compared with other connection methods, this installation method is simpler and can save assembly time and cost. In addition, the adhesive has good stability and reliability. Even when the battery device 100 experiences long-term vibration, high and low temperature changes and other complex working conditions, the first heating element 2 can always be fixed to ensure the stable operation of the battery device 100.

[0130] Please refer to Figure 6 and Figure 7 As shown, Figure 6It is a schematic structural diagram of the cover body 12 and the first heating element 2 of some embodiments of the present application. Figure 7 It is an exploded view of the cover body 12 and the first heating element 2 according to some embodiments of the present application.

[0131] In some embodiments of the present application, Figure 6 and Figure 7 As shown, the cover body 12 includes a first layer plate 121 and a second layer plate 122 which are stacked, and at least a portion of the first heating element 2 is installed between the first layer plate 121 and the second layer plate 122 .

[0132] Exemplarily, the sizes of the first layer plate 121 and the second layer plate 122 may be the same. When the sizes of the first layer plate 121 and the second layer plate 122 are the same, the structural strength of the cover body 12 may be better improved.

[0133] Exemplarily, the sizes of the first layer 121 and the second layer 122 may also be different. When the sizes of the first layer 121 and the second layer 122 are different, for example, the first layer 121 is stacked on the outside of the second layer 122, the size of the second layer 122 can be smaller, and the second layer 122 can be mainly used to cooperate with the first layer 121 to wrap the first heating element 2 between the first layer 121 and the second layer 122. Therefore, the size of the second layer 122 can be designed according to the size of the first heating element 2, which is flexible and can save costs.

[0134] Exemplarily, the outer periphery of the first layer plate 121 has a first flange, and the outer periphery of the second layer plate 122 has a second flange. The first flange and the second flange can be overlapped and fixedly connected by welding.

[0135] In the above example, at least part of the first heating element 2 is installed between the first layer plate 121 and the second layer plate 122 of the cover body 12, which can provide a relatively stable protection for the first heating element 2, effectively prevent the first heating element 2 from being damaged by external collision or extrusion, and extend its service life. At the same time, this installation method further optimizes the heat transfer path, so that the heat is evenly diffused between the two layers of plates, and then more efficiently transferred to the battery box 1, improving the overall heating effect.

[0136] In some embodiments of the present application, Figure 6 and Figure 7 As shown, the first heating element 2 includes a heating body 21 and an electrical connector 22 . The heating body 21 is located between the first layer board 121 and the second layer board 122 . At least part of the electrical connector 22 extends out from between the first layer board 121 and the second layer board 122 .

[0137] That is to say, the heating body 21 is between the first plate 121 and the second plate 122, which not only ensures a good heating effect, but also is protected by the first plate 121 and the second plate 122. At least part of the electrical connector 22 extends from between the first plate 121 and the second plate 122. On the one hand, it is convenient to connect the electrical connector 22 with an external power supply or control system, simplify the wiring process, and improve the installation efficiency. On the other hand, the heating body 21 is safely wrapped to avoid accidental touch or damage due to the connection operation of the electrical connector 22, which ensures the stability and reliability of the overall operation of the battery device 100 and improves the overall performance of the battery system.

[0138] Exemplarily, the heating body 21 may be a heating wire, or a heating film or a heating plate 23, which is not limited in the present application.

[0139] In the above example, by placing the heater 21 between the first plate 121 and the second plate 122 , a good heating effect is ensured and the heater 21 is well protected, thereby ensuring the stability and reliability of the overall operation of the battery device 100 and improving the overall performance of the battery system.

[0140] Please refer to Figure 2 and Figure 8 , Figure 8 This is a schematic structural diagram of the battery device 100 without the cover 12 in some embodiments of the present application.

[0141] In some embodiments of the present application, Figure 2 and Figure 8 As shown, the battery device 100 further includes a battery cell assembly 4 , which includes a plurality of battery cells 41 and a bus bar 42 . Each battery cell 41 is provided with a pole 411 on a side close to the cover 12 , and the bus bar 42 connects the poles 411 of two adjacent battery cells 41 .

[0142] That is to say, multiple battery cells 41 can be connected in series, parallel or mixed through the bus 42, and by arranging the pole 411 of the battery cell 41 on the side close to the battery cell 41 close to the cover 12, when condensed water is generated near the pole 411 and the bus 42, and the humidity near the pole 411 and the bus 42 increases, the first heating element 2 can better heat the pole 411, the bus 42 and the air near the pole 411 and the bus 42, so as to better evaporate the condensed water and better reduce the humidity near the pole 411 and the bus 42, thereby reducing the risk of short circuit of the battery cell assembly 4 caused by condensed water and moisture in the battery pack.

[0143] In the above example, by arranging the pole 411 of the battery cell 41 on the side of the battery cell 41 close to the cover body 12, the first heating element 2 can better heat the pole 411, the bus 42 and the air near the pole 411 and the bus 42, thereby reducing the risk of short circuit of the battery cell assembly 4 caused by condensed water and moisture in the battery pack.

[0144] Reference Figure 2 as well as Fig. 9 and Fig.10 As shown, Fig. 9 is an exploded view of a battery device 100 according to some embodiments of the present application. Fig.10 FIG. 1 is an exploded view of the battery device 100 according to some embodiments of the present application with the cover 12 removed.

[0145] In some embodiments of the present application, Figure 2 , Fig. 9 and Fig.10 As shown, at least part of the first heating element 2 is arranged opposite to the busbar 42 , wherein the first heating element 2 is spaced apart from the busbar 42 , and / or the surface of the first heating element 2 facing the busbar 42 has an insulating layer.

[0146] The relative setting here means that, in the projection plane perpendicular to the thickness direction of the cover body 12, at least part of the projection of the first heating element 2 overlaps with the projection of the bus 42. In this way, the first heating element 2 can be closer to the bus 42, so that the bus 42 and the air near the bus 42 can be better heated, so that the condensed water near the bus 42 can be better evaporated, and the humidity near the pole 411 and the bus 42 can be better reduced, thereby reducing the risk of short circuit of the battery cell assembly 4 due to condensed water and moisture in the battery pack.

[0147] Exemplarily, the first heating element 2 may include an insulating material, and therefore, the first heating element 2 may be attached to the bus 42; whereas, if the first heating element 2 is not made of an insulating material, the first heating element 2 may be separated from the bus 42; specifically, they may be separated along a third direction Z. Thus, the risk of the first heating element 2 causing a short circuit in the battery cell assembly 4 may be reduced. Additionally, an insulating layer may be arranged on the surface of the battery cell assembly 4 facing the bus 42, thereby more effectively reducing the risk of the first heating element 2 causing a short circuit in the battery cell assembly 4.

[0148] In the above example, by arranging the first heating element 2 and the bus 42 relative to each other, the distance between the first heating element 2 and the bus 42 can be made closer, so that the bus 42 and the air near the bus 42 can be better heated, so that the condensed water near the bus 42 can be better evaporated, and the humidity near the pole 411 and the bus 42 can be better reduced, thereby reducing the risk of short circuit of the battery cell assembly 4 caused by condensed water and moisture in the battery pack.

[0149] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the first heating element 2 includes a heating plate 23 , the area of ​​the heating plate 23 is S1 , and the area of ​​the battery cell assembly 4 facing the cover 12 is S2 , satisfying: 1 / 3≤S1 / S2≤1.

[0150] Reference Figure 2 In the example shown, the heating plate 23 is a plate with a larger area, and the heating plate 23 is adjacent to the second cavity equipped with electrical components, and the exhaust valve 3 is connected to the second cavity. Therefore, when the heating plate 23 is heated, the moisture in the second cavity can be better discharged from the exhaust valve 3, and the humidity of the second cavity can be better reduced. When the humidity of the second cavity is reduced, as the gas in the battery box 1 flows, the overall humidity in the battery box 1 can be better reduced.

[0151] In addition, by satisfying the above-mentioned area ratio, the heating plate 23 can be saved while the effect of reducing the overall humidity in the battery box 1 can be better ensured, thereby reducing the cost of the first heating element 2 to a certain extent.

[0152] Exemplarily, S1 / S2 can be 1 / 3, 1 / 2, 2 / 3, 3 / 4, 4 / 5, 5 / 6, or 1.

[0153] In the above example, by satisfying the above area ratio, the heating plate 23 can be saved while the effect of the heating plate 23 in reducing the overall humidity in the battery box 1 can be better ensured, thereby reducing the cost of the first heating element 2 to a certain extent.

[0154] In some embodiments of the present application, Figure 8-Figure 10 As shown, a plurality of battery cells 41 are sequentially arranged along a first direction X to form a battery cell column, and the battery cell column is arranged in at least two columns in a second direction Y, and each battery cell column has a pole column, and the pole column is composed of a plurality of poles 411 arranged at intervals along the first direction X, wherein the first heating element 2 includes a plurality of heating plates 23, and each heating plate 23 is arranged above at least one pole column, and the first direction X and the second direction Y are perpendicular to each other.

[0155] like Figure 8-Figure 10As shown, the battery cell assembly 4 includes two battery cell columns, and the two battery cell columns are arranged along the second direction Y. Each battery cell 41 has two poles 411, and the two poles 411 are spaced apart along the second direction Y as a first pole and a second pole. Here, the first pole and the second pole do not specify which one is the positive pole and which one is the negative pole. For example, the poles 411 located in the same pole column are all first poles. Thus, a plurality of first poles constitute a pole column, and a plurality of second poles constitute a pole column. The two pole columns are spaced apart along the second direction Y, and a heating plate 23 is arranged on each pole column.

[0156] Further, for the convenience of explanation, Fig.10 The four pole columns are the first pole column, the second pole column, the third pole column and the fourth pole column, and the first pole column and the fourth pole column are located on both sides. Since the second pole column and the third pole column are close to each other in the second direction Y, a larger heating plate 23 can be used to cover the second pole column and the third pole column at the same time, which not only facilitates assembly, but also effectively reduces the humidity at the second pole column and the third pole column.

[0157] Of course, it is understandable that a heating plate 23 may also cover the first pole column and the second pole column, and the present application does not limit this.

[0158] In the above example, by arranging the first heating element 2, the humidity near the pole 411 and the bus bar 42 can be reduced to a good extent, thereby reducing the risk of short circuit of the battery cell assembly 4 caused by condensed water and moisture in the battery pack.

[0159] Please refer to Fig.11 and Fig.12 , Fig.11 FIG. 1 is an exploded view of a battery device 100 according to some embodiments of the present application. Fig.12 This is an exploded view of the battery device 100 according to some embodiments of the present application, with the cover 12 removed.

[0160] In some embodiments of the present application, Figure 2 , Fig.11 and Fig.12 As shown, the battery device 100 further includes a heat exchange element 5 , which is arranged on the surface of the battery cell assembly 4 where the pole 411 is arranged, and the first heating element 2 is arranged opposite to the heat exchange element 5 .

[0161] That is to say, the heat exchanger 5 can cool down the battery cell assembly 4 or heat up the battery cell assembly 4, so that the battery cell assembly 4 is at a better operating temperature, thereby improving the performance of the battery cell assembly 4. When the heat exchanger 5 cools down the battery cell 41, the temperature of the heat exchanger 5 is low, which easily generates condensed water on the surface of the heat exchanger 5, and the overflow of condensed water easily causes the battery cell assembly 4 to short-circuit. In this application, the heat exchanger 5 is arranged on the surface of the battery cell assembly 4 where the pole 411 is arranged, so that the distance between the first heating element 2 and the heat exchanger 5 is relatively close. In this way, the condensed water on the surface of the heat exchanger 5 can be better removed by heating through the first heating element 2.

[0162] In addition, the operation of the first heating element 2 can be intermittent, for example, the start and stop time of the first heating element 2 is specified, and the first heating element 2 is started intermittently at a predetermined time, which can reduce the risk of condensed water causing a short circuit in the battery cell assembly 4 without affecting the cooling of the battery cell assembly 4 by the heat exchange element 5. In addition, in other examples, the first heating element 2 can be started again when the heat exchange element 5 stops cooling the battery cell assembly 4. The specific control strategy can be based on actual needs, and this application will not elaborate on this.

[0163] In the above example, the heat exchange element 5 is arranged on the surface of the battery cell assembly 4 where the pole 411 is arranged, so that the distance between the first heating element 2 and the heat exchange element 5 is closer. In this way, the condensed water on the surface of the heat exchange element 5 can be better removed by heating through the first heating element 2, thereby reducing the risk of short circuit of the battery cell assembly 4 caused by condensed water and moisture in the battery pack.

[0164] In some embodiments of the present application, Fig.11 and Fig.12 As shown, the heat exchange element 5 and the pole 411 are arranged spaced apart.

[0165] Exemplarily, the heat exchanger 5 and the bus 42 are not in contact. On the one hand, this can reduce the risk of the heat exchanger 5 electrically connecting the two bus bars 42 and causing a short circuit in the battery cell assembly 4. On the other hand, it allows the heat exchanger 5 and the bus bar 42 to be separated by a certain distance. After condensed water is generated on the heat exchanger 5, the condensed water is not easy to overflow to the bus bar 42, thereby reducing the risk of condensed water causing a short circuit between the two bus bars 42 and causing a short circuit in the battery cell assembly 4.

[0166] Exemplarily, the heat exchanger 5 and the bus 42 partially overlap in the first direction X or the second direction Y, and the heat exchanger 5 and the bus 42 are insulated, but the heat exchanger 5 is separated from the pole 411 in the first direction X or the second direction Y. After condensed water is generated on the heat exchanger 5, it is heated by the first heating element 2 to better remove the condensed water. The condensed water is not easy to overflow to the pole 411, thereby reducing the risk of the condensed water causing the two poles 411 to short-circuit and causing the battery cell assembly 4 to short-circuit.

[0167] In the above example, by spacing the heat exchange element 5 from the pole 411 , it is possible to better avoid condensed water generated on the heat exchange element 5 from electrically connecting two adjacent poles 411 , thereby reducing the risk of short circuiting the battery cell assembly 4 .

[0168] In some embodiments of the present application, Fig.11 and Fig.12 As shown, a plurality of battery cells 41 are sequentially stacked along a first direction X to form a battery cell column, and the battery cell column is arranged in at least two columns in a second direction Y, and each battery cell column has a pole column, and the pole column column is composed of a plurality of poles 411 arranged at intervals along the first direction X. The heat exchange element 5 includes: a first heat exchange section 51, the first heat exchange section 51 extends along the first direction X, and in the second direction Y, the first heat exchange section 51 is located on at least one side of the pole column, and the first direction X and the second direction Y are perpendicular to each other.

[0169] In this example, the introduction of the battery cell column and the pole column has been described above and will not be repeated in this example.

[0170] like Fig.11 and Fig.12 As shown, the first heat exchange section 51 is a long strip extending along the first direction X. In the second direction Y, the first heat exchange section 51 can be located on one side of the pole column or on both sides of the pole column. The specific arrangement can be based on actual needs, and the present application does not impose any restrictions. Through the above arrangement of the first heat exchange section 51, the battery cell assembly 4 can be better heat exchanged, so that the battery cell assembly 4 is always at a better operating temperature, which is beneficial to improving the operating performance of the battery cell assembly 4.

[0171] In the above example, by locating the first heat exchange section 51 on at least one side of the pole column, the battery cell assembly 4 can be better heat exchanged, so that the battery cell assembly 4 is always at a good operating temperature, which is beneficial to improving the operating performance of the battery cell assembly 4.

[0172] In some embodiments of the present application, Fig.11 and Fig.12As shown, the heating element includes: a first heating section 24 , the first heating section 24 extends along the first direction X, and the first heating section 24 is arranged corresponding to the first heat exchange section 51 .

[0173] exist Fig.11 and Fig.12 In the example, the first heating section 24 is a long strip extending along the first direction X. The first heating section 24 and the first heat exchange section 51 can be stacked in the third direction Z. Stacking means that the first heating section 24 and the first heat exchange section 51 can be attached to each other or spaced apart in the third direction Z. This example does not limit this. The first heating section 24 can heat the first heat exchange section 51 well, so that the condensed water generated on the first heat exchange section 51 can be evaporated well, which can reduce the risk of the condensed water causing the battery cell assembly 4 to short-circuit.

[0174] In addition, the corresponding arrangement of this example can also refer to the explanation above, and this example will not be repeated.

[0175] In the above example, by arranging the first heating section 24 corresponding to the first heat exchange section 51, the first heating section 24 can better heat the first heat exchange section 51, so that the condensed water generated on the first heat exchange section 51 can be better evaporated, which can reduce the risk of the condensed water causing the battery cell assembly 4 to short-circuit.

[0176] In some embodiments of the present application, in the first direction X, the length of the first heat exchange section 51 is L1, and the length of the first heating section 24 is L2, satisfying: 1 / 3≤L2 / L1≤1; and / or, in the second direction Y, the width of the first heat exchange section 51 is W1, and the width of the first heating section 24 is W2, satisfying: 1 / 3≤W2 / W1≤1.

[0177] Exemplarily, L2 / L1 can be 1 / 3, 1 / 2, 2 / 3, 3 / 4, 4 / 5, 5 / 6, or 1.

[0178] Exemplarily, W2 / W1 can be 1 / 3, 1 / 2, 2 / 3, 3 / 4, 4 / 5, 5 / 6, or 1.

[0179] In the above example, by setting the length and width of the first heat exchange section 51 and the length and width of the first heating section 24 , the first heating section 24 can better achieve the effect of removing condensed water on the first heat exchange section 51 .

[0180] In some embodiments of the present application, Fig.11 and Fig.12 As shown, the heat exchange element 5 further includes: at least one second heat exchange segment 52 , the second heat exchange segment 52 extends along the second direction Y, and in the first direction X, the second heat exchange segment 52 is connected to the end of the first heat exchange segment 51 in the first direction X.

[0181] exist Fig.11 and Fig.12 In the specific example shown, a plurality of first heat exchange sections 51 are provided, and the plurality of first heat exchange sections 51 are spaced apart along the second direction Y; there are two second heat exchange sections 52, and the two second heat exchange sections 52 are spaced apart along the first direction X; one end of the plurality of first heat exchange sections 51 is connected to one second heat exchange section 52, and the other end of the plurality of first heat exchange sections 51 is connected to another second heat exchange section 52.

[0182] Exemplarily, one second heat exchange section 52 may also be provided.

[0183] In the above example, by arranging the first heat exchange section 51 and the second heat exchange section 52 , the heat exchange effect of the heat exchange component 5 on the battery cell assembly 4 can be improved, so that the battery cell assembly 4 is at a more suitable operating temperature, which is beneficial to the operating performance of the battery cell assembly 4 .

[0184] In some embodiments of the present application, the heating element includes: a second heating section 25 , the second heating section 25 extends along the second direction Y, and the second heating section 25 is arranged corresponding to the second heat exchange section 52 .

[0185] exist Fig.11 and Fig.12 In the example, the second heating section 25 is a long strip extending along the second direction Y. The second heating section 25 and the second heat exchange section 52 can be stacked in the third direction Z. Stacking means that the second heating section 25 and the second heat exchange section 52 can fit together or be spaced apart in the third direction Z. This example does not limit this. The second heating section 25 can heat the second heat exchange section 52 well, so that the condensed water generated on the second heat exchange section 52 can be evaporated well, which can reduce the risk of the condensed water causing the battery cell assembly 4 to short-circuit.

[0186] In addition, the corresponding arrangement of this example can also refer to the explanation above, and this example will not be repeated.

[0187] In the above example, by arranging the second heating section 25 corresponding to the second heat exchange section 52, the second heating section 25 can better heat the second heat exchange section 52, so that the condensed water generated on the second heat exchange section 52 can be better evaporated, which can reduce the risk of the condensed water causing the battery cell assembly 4 to short-circuit.

[0188] In some embodiments of the present application, in the second direction Y, the length of the second heat exchange section 52 is L3, and the length of the second heating section 25 is L4, satisfying: 1 / 3≤L4 / L3≤1; and / or, in the first direction X, the width of the second heat exchange section 52 is W3, and the width of the second heating section 25 is W4, satisfying: 1 / 3≤W4 / W3≤1.

[0189] Exemplarily, L4 / L3 can be 1 / 3, 1 / 2, 2 / 3, 3 / 4, 4 / 5, 5 / 6, 1.

[0190] Exemplarily, W4 / W3 can be 1 / 3, 1 / 2, 2 / 3, 3 / 4, 4 / 5, 5 / 6, 1.

[0191] In the above example, by setting the length and width of the second heat exchange section 52 and the length and width of the second heating section 25 , the second heating section 25 can better achieve the effect of removing condensed water on the second heat exchange section 52 .

[0192] In some embodiments of the present application, the heat exchange element 5 includes a heat exchange tube, or the heat exchange element 5 includes a heat exchange plate having a heat exchange channel therein.

[0193] Exemplarily, the heat exchange element 5 includes a heat exchange tube, and the heat exchange tube extends in a curved manner.

[0194] Exemplarily, the heat exchange element 5 includes a heat exchange plate, which includes a first plate and a second plate. Both the first plate and the second plate can be stamped, so that the first plate and the second plate are stacked and connected to form a heat exchange channel between the first plate and the second plate.

[0195] In the above example, the heat exchange tube and the heat exchange plate have simple structures, and can better exchange heat for the battery cell assembly 4, so that the battery cell assembly 4 is at a more suitable operating temperature, which is beneficial to the operating performance of the battery cell assembly 4.

[0196] In some embodiments of the present application, the battery device 100 further includes a second heating element, which is arranged on at least one side of the battery cell assembly 4 in the first direction X and / or the second direction Y, and the first direction X and the second direction Y are perpendicular to each other.

[0197] That is to say, when the second heating element is heating, on the one hand, it can evaporate the condensed water and facilitate the discharge of moisture in the battery box 1 from the exhaust valve 3, thereby reducing the risk of short circuit of the battery cell assembly 4. On the other hand, when the battery device 100 is cold started, the second heating element can cooperate with the first heating element 2, or even the heat exchange element 5 to heat the battery cell assembly 4, so that the battery cell assembly 4 has a better operating temperature, which is beneficial to the operation of the battery cell assembly 4.

[0198] Exemplarily, the second heating element may be arranged on one side of the battery cell assembly 4 in the first direction X, or may be arranged on both sides of the battery cell assembly 4 in the first direction X.

[0199] Exemplarily, the second heating element may be arranged on one side of the battery cell assembly 4 in the second direction Y, or may be arranged on both sides of the battery cell assembly 4 in the second direction Y.

[0200] In the above example, by providing the second heating element, it is not only beneficial to evaporate the condensed water and reduce the humidity in the battery box 1, but also beneficial to the cold start of the battery device 100.

[0201] In some embodiments of the present application, Fig. 9 As shown, the box body 11 includes a frame 111 and a bottom plate 112. The frame 111 is constructed as a ring extending along the outer periphery of the bottom plate 112. The outer peripheries of the frame 111 and the bottom plate 112 are connected to construct a accommodating cavity with an opening. The cover body 12 is covered at the opening, and the exhaust valve 3 is installed on the frame 111.

[0202] In the above example, the battery box 1 composed of the frame 111 , the bottom plate 112 and the cover 12 can better resist external impact and pressure, thereby better providing the safety and reliability of the battery device 100 .

[0203] In some embodiments of the present application, the box body 11 also includes a beam body 113, which is installed in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity and a second accommodating cavity. The battery cell assembly 4 is installed in the first accommodating cavity, and the exhaust valve 3 is installed on the frame 111 corresponding to the second accommodating cavity.

[0204] That is to say, the beam 113 separates the accommodating chamber into a first accommodating chamber and a second accommodating chamber, and the battery cell assembly 4 is installed in the first accommodating chamber, which can facilitate the assembly of the battery cell assembly 4. At the same time, the beam 113 also plays a role in reinforcing the box body 11, further improving the structural strength of the box body 11. The exhaust valve 3 is installed on the frame 111 corresponding to the second accommodating chamber. When the first heating element 2 or even the second heating element is heated, moisture can first be gathered and buffered in the second accommodating chamber, and then discharged by the exhaust valve 3, which can make the exhaust process more efficient and stable, and is conducive to improving the safety and reliability of the battery device 100.

[0205] Please refer to Fig.13 and Fig.14 , Fig.13 This is a schematic structural diagram of the battery device 100 without the cover 12 in some embodiments of the present application. Fig.14 for Fig.13 Magnified view of area A.

[0206] In some embodiments of the present application, Fig.13 and Fig.14 As shown, the exhaust valve 3 includes a valve body 31 and a humidity sensor 32 mounted on the valve body 31 .

[0207] That is, the humidity sensor 32 can sense the humidity in the battery box 1. For example, the humidity value sensed by the humidity sensor 32 can be obtained by the control system, and then the valve body 31 can be controlled to open or close. In addition, in this example, by integrating the humidity sensor 32 on the valve body 31, the difficulty of assembly can be reduced, and it can also be beneficial to the discharge of moisture in the box 11.

[0208] In the above example, by integrating the humidity sensor 32 on the valve body 31 , the difficulty of assembly can be reduced, and it can also be beneficial to discharge moisture in the box body 11 .

[0209] In some embodiments of the present application, the valve body 31 is a one-way valve, so that moisture in the battery box 1 can be continuously discharged from the valve body 31 , and gas generated when the battery cell assembly 4 is running can also be discharged through the valve body 31 , thereby facilitating the operation of the battery device 100 .

[0210] In the above example, by making the valve body 31 a one-way valve, moisture in the battery box 1 can be continuously discharged from the valve body 31 , and the gas generated when the battery cell assembly 4 is running can also be discharged through the valve body 31 , which is beneficial to the operation of the battery device 100 .

[0211] Reference Fig.15 , Fig.16 and Fig.17 As shown, Fig.15 for Figure 8 The enlarged image of area B in the middle. Fig.16 is a schematic diagram of the structure of a battery device 100 according to some embodiments of the present application. Fig.17 for Fig.16 The exhaust valve 3 has an exhaust hole 33 , and in the third direction Z, the opening of the exhaust hole 33 faces the bottom plate 112 .

[0212] The present application also provides an electrical device.

[0213] According to the electric device of the embodiment of the present application, the electric device may include a battery device 100, and the battery device 100 is used to store or provide electric energy.

[0214] In the above example, by providing the battery device 100 of the above example, the electrical device of the present application can have higher reliability and good safety.

[0215] Other structures and operations of the battery device 100 and the electrical device according to the embodiment of the present application are known to those skilled in the art and will not be described in detail here.

[0216] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0217] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0218] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: A battery box (1), the battery box (1) comprising a box body (11) and a cover body (12); A first heating element (2), the first heating element (2) being mounted on the cover body (12); An exhaust valve (3), wherein the exhaust valve (3) is installed on the box body (11) and / or the cover body (12).

2. The battery device according to claim 1, characterized in that: The first heating element (2) is installed on the inner surface of the cover body (12).

3. The battery device according to claim 2, characterized in that: Also includes: An adhesive member, through which the first heating member (2) is mounted on the inner surface of the cover body (12).

4. The battery device according to claim 1, characterized in that: The cover body (12) comprises a first layer plate (121) and a second layer plate (122) which are stacked, and at least a portion of the first heating element (2) is installed between the first layer plate (121) and the second layer plate (122).

5. The battery device according to claim 4, characterized in that: The first heating element (2) comprises a heating body (21) and an electric connector (22); the heating body (21) is located between the first layer board (121) and the second layer board (122); at least part of the electric connector (22) extends from between the first layer board (121) and the second layer board (122).

6. The battery device according to claim 1, characterized in that: Also includes: A battery cell assembly (4), the battery cell assembly (4) comprising a plurality of battery cells (41) and a busbar (42), each of the battery cells (41) being provided with a pole (411) on a side close to the cover (12), the busbar (42) connecting the poles (411) of two adjacent battery cells (41).

7. The battery device according to claim 6, characterized in that: At least a portion of the first heating element (2) is arranged opposite to the busbar (42), wherein the first heating element (2) is spaced apart from the busbar (42), and / or the surface of the first heating element (2) facing the busbar (42) has an insulating layer.

8. The battery device according to claim 7, characterized in that: The first heating element (2) comprises a heating plate (23), the area of ​​the heating plate (23) is S1, the area of ​​the battery cell assembly (4) on the side facing the cover (12) is S2, and the following condition is satisfied: 1 / 3≤S1 / S2≤1.

9. The battery device according to claim 7, characterized in that: A plurality of battery cells (41) are sequentially arranged along a first direction (X) to form a battery cell column, wherein the battery cell column is arranged in at least two columns in a second direction (Y), each of the battery cell columns has a pole column, and the pole column column is composed of a plurality of poles (411) arranged at intervals along the first direction (X), wherein the first heating element (2) comprises a plurality of heating plates (23), each of the heating plates (23) is arranged above at least one of the pole columns, and the first direction (X) and the second direction (Y) are perpendicular to each other.

10. The battery device according to claim 6, characterized in that: It also comprises a heat exchange element (5), the heat exchange element (5) being arranged on the surface of the battery cell assembly (4) on which the pole (411) is arranged, and the first heating element (2) being arranged opposite to the heat exchange element (5).

11. The battery device according to claim 10, characterized in that: The heat exchange element (5) and the pole (411) are arranged spaced apart from each other.

12. The battery device according to claim 10, characterized in that: A plurality of battery cells (41) are stacked in sequence along a first direction (X) to form a battery cell column, wherein the battery cell column is arranged in at least two columns in a second direction (Y), and each of the battery cell columns has a pole column, wherein the pole column is composed of a plurality of poles (411) arranged at intervals along the first direction (X). The heat exchange element (5) comprises: a first heat exchange section (51), wherein the first heat exchange section (51) extends along the first direction (X), and in the second direction (Y), the first heat exchange section (51) is located on at least one side of the pole column, and the first direction (X) and the second direction (Y) are perpendicular to each other.

13. The battery device according to claim 12, characterized in that: The first heating element (2) comprises: a first heating section (24), the first heating section (24) extending along the first direction (X), and the first heating section (24) being arranged corresponding to the first heat exchange section (51).

14. The battery device according to claim 13, characterized in that: In the first direction (X), the length of the first heat exchange section (51) is L1, and the length of the first heating section (24) is L2, satisfying: 1 / 3≤L2 / L1≤1; and / or, In the second direction (Y), the width of the first heat exchange section (51) is W1, and the width of the first heating section (24) is W2, satisfying: 1 / 3≤W2 / W1≤1.

15. The battery device according to claim 12, characterized in that: The heat exchange element (5) further comprises: at least one second heat exchange section (52), the second heat exchange section (52) extending along the second direction (Y), and in the first direction (X), the second heat exchange section (52) is connected to the end of the first heat exchange section (51) in the first direction (X).

16. The battery device according to claim 15, characterized in that: The first heating element (2) comprises: a second heating section (25), the second heating section (25) extends along the second direction (Y), and the second heating section (25) is arranged corresponding to the second heat exchange section (52).

17. The battery device according to claim 16, characterized in that: In the second direction (Y), the length of the second heat exchange section (52) is L3, and the length of the second heating section (25) is L4, satisfying: 1 / 3≤L4 / L3≤1; and / or, In the first direction (X), the width of the second heat exchange section (52) is W3, and the width of the second heating section (25) is W4, satisfying: 1 / 3≤W4 / W3≤1.

18. The battery device according to claim 10, characterized in that: The heat exchange element (5) comprises a heat exchange tube, or the heat exchange element (5) comprises a heat exchange plate, wherein the heat exchange plate has a heat exchange flow channel.

19. The battery device according to claim 6, characterized in that: Also includes: A second heating element is arranged on at least one side of the battery cell assembly (4) in a first direction (X) and / or a second direction (Y), wherein the first direction (X) and the second direction (Y) are perpendicular to each other.

20. The battery device according to claim 1, characterized in that The box body (11) comprises a frame (111) and a bottom plate (112); the frame (111) is constructed in a ring shape extending along the outer periphery of the bottom plate (112); the outer peripheries of the frame (111) and the bottom plate (112) are connected to form a receiving cavity with an opening; the cover body (12) is arranged to cover the opening; and the exhaust valve (3) is mounted on the frame (111).

21. The battery device according to claim 20, characterized in that The box body (11) further comprises a beam body (113), wherein the beam body (113) is installed in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity and a second accommodating cavity, the battery cell assembly (4) is installed in the first accommodating cavity, and the exhaust valve (3) is installed on the frame (111) corresponding to the second accommodating cavity.

22. The battery device according to claim 1, characterized in that The exhaust valve (3) comprises a valve body (31) and a humidity sensor (32) mounted on the valve body (31).

23. The battery device according to claim 22, characterized in that The valve body (31) is a one-way valve.

24. An electrical device, characterized in that: The battery device (100) comprises the battery device (100) according to any one of claims 1 to 23, wherein the battery device (100) is used for storing or providing electrical energy.

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