Battery device, battery box body and power utilization device

Abstract

The invention discloses a battery device, a battery box body and a power utilization device, and relates to the technical field of batteries. The battery single body assembly is arranged in the battery box body, the battery box body comprises a plate body assembly, the plate body assembly comprises a first plate body, a second plate body, a first heating assembly and a heating piece, the first plate body and the second plate body are arranged in a stacked mode, and the first plate body is located on the side, close to the battery single body assembly, of the second plate body; the first heating assembly is arranged between the first plate body and the second plate body, and the heat exchange piece is arranged on one side, facing the battery monomer assembly, of the second plate body. According to the battery device, when the temperature of the battery device is relatively low, the battery monomer assembly can be heated, so that electrochemical reaction substances in the battery monomers quickly reach a high-activity state, the working efficiency of the battery device in a low-temperature environment is improved, the heat release area can be increased by the first plate body, and the heat dissipation efficiency of the battery device is improved. And the heating uniformity of the battery monomer assembly is improved.

Description

Technical Field

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

[0002] The battery device involves relatively complex electrochemical reactions during the charging and discharging process. In related technologies, when the battery device is in a low-temperature environment and its temperature is low, the efficiency of the electrochemical reaction in the battery device is low, resulting in low working efficiency of the battery device in the low-temperature environment. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application is to provide a battery device and a battery box, and an electrical device including the battery device or the battery box, wherein the battery device has a high working efficiency in a low temperature environment.

[0004] In a first aspect, an embodiment of the present application provides a battery device, comprising: a battery cell assembly; a battery case, wherein the battery cell assembly is arranged in the battery case, the battery case includes a plate assembly, the plate assembly includes a first plate, a second plate, a first heating assembly and a heat exchanger, the first plate and the second plate are stacked, and the first plate is located on a side of the second plate close to the battery cell assembly, the first heating assembly is arranged between the first plate and the second plate for heating the battery cell assembly, and the heat exchanger is arranged on a side of the second plate facing the battery cell assembly.

[0005] In the above technical manner, according to the battery device of the embodiment of the present application, the battery cell assembly can be heated when the temperature of the battery device is low, so that the electrochemical reaction substances in the battery cell quickly reach a high activity state, thereby improving the working efficiency of the battery device in a low temperature environment, and the first plate can increase the heat release area, improve the uniformity of heating the battery cell assembly, and reduce the probability of thermal runaway caused by local overheating of the battery cell during heating. By setting a heat exchanger, on the one hand, the range of temperature control of the battery device can be increased, and the reliability of the battery device during operation can be further improved. When the heat exchanger can heat the battery device, the heating rate of the battery device in a low temperature environment can be further improved. On the other hand, the reliability of the heat exchanger is high and the layout difficulty is low.

[0006] In some embodiments, the first heating assembly includes: a heating element and a substrate, and the heating element is disposed on the substrate.

[0007] In some embodiments, the heating element is disposed within the substrate.

[0008] In the above technical manner, by arranging the heating element in the substrate, the uniformity of heat distribution on the substrate can be improved, thereby improving the uniformity of heat distribution on the first plate body, thereby further improving the uniformity of temperature rise of the battery cell assembly.

[0009] In some embodiments, a heat-conducting layer is disposed on a side of the substrate facing the first plate body, and the heating element is disposed in the heat-conducting layer.

[0010] In the above technical manner, by providing a heat-conducting layer, the uniformity of heat distribution on the first plate can be improved, thereby further improving the uniformity of temperature rise of the battery cell assembly.

[0011] In some embodiments, the thermal conductive layer is a polyimide layer, or the thermal conductive layer is a silicone layer.

[0012] In the above technical approach, on the one hand, the thermal conductive layer has a longer service life, which can improve the reliability of the battery device during operation; on the other hand, the thermal conductive layer can absorb part of the vibration on the battery device, thereby improving the stability of the battery device during operation.

[0013] In some embodiments, there are multiple heating elements, including at least one first heating element and at least one second heating element, the first heating element extends along a first direction, the second heating element extends along a second direction, the first direction, the second direction and the thickness direction of the substrate intersect each other, and the first heating element and the second heating element are arranged crosswise.

[0014] In the above technical manner, by providing the first heating element and the second heating element in a cross-arrangement, the uniformity of the temperature rise of the battery device can be further improved.

[0015] In some embodiments, there are a plurality of first heating elements, and the plurality of first heating elements are arranged at intervals in the second direction; and / or there are a plurality of second heating elements, and the plurality of second heating elements are arranged at intervals in the first direction.

[0016] In the above technical manner, by providing a plurality of first heating elements and a plurality of second heating elements, the uniformity of the temperature rise of the battery device can be further improved.

[0017] In some embodiments, a plurality of the heating elements are connected in parallel.

[0018] In the above technical approach, by connecting a plurality of electric heating elements in parallel, it is possible to achieve fixed-point heating of the battery device, further improving the uniformity of the temperature rise of the battery device.

[0019] In some embodiments, the substrate is a one-piece piece.

[0020] In the above technical manner, by providing the substrate as an integral piece, the assembly steps of the plate assembly can be simplified and the protective effect of the plate assembly on the battery device can be improved.

[0021] In some embodiments, the substrate includes a plurality of single plates, and the plurality of single plates are arranged in a matrix.

[0022] In the above technical approach, the substrate is formed by a plurality of single plates, which can reduce the difficulty of designing and assembling the plate assembly.

[0023] In some embodiments, the second plate body and the base plate are adhesively connected.

[0024] In the above technical method, the production difficulty can be reduced by bonding the second plate body and the substrate, and the strength of the bonding connection is relatively high, which makes it easier for the connection strength between the second plate body and the substrate to meet the design requirements. In addition, the bonding layer can also absorb part of the vibration on the battery device, further improving the stability of the battery device during operation.

[0025] In some embodiments, a portion of the surface of the second plate body facing the substrate is recessed in a direction away from the substrate to form a receiving groove, the substrate is disposed in the receiving groove, and the periphery of the first plate body is connected to the periphery of the receiving groove.

[0026] In the above technical method, on the one hand, the difficulty of assembly can be reduced, the positioning accuracy of the substrate after assembly can be improved, and the stability of the board assembly during the operation of the battery device can be improved. On the other hand, the space occupied by the board assembly in the thickness direction can be reduced, thereby facilitating the arrangement of the board assembly on the battery device.

[0027] In some embodiments, the heating element has a lead-out section, and in a direction perpendicular to the thickness direction of the substrate, the lead-out section extends out of an outer edge of the substrate.

[0028] In the above technical approach, by providing a lead-out section, during the design and assembly of the battery device, only the connection between the lead-out section and the component that realizes the heating function of the heating element needs to be considered, which can reduce the design and assembly difficulty of the battery device.

[0029] In some embodiments, the substrate has a lead-out portion, and in a direction perpendicular to the thickness direction of the substrate, the lead-out portion protrudes outwardly from an outer edge of the substrate, and the lead-out section extends outwardly from the lead-out portion.

[0030] In the above technical method, by setting the lead-out part, when a gap is generated between the lead-out section and the lead-out part, the contact between the heating element and the substrate body is still relatively sufficient, and the operation of connecting the lead-out section during the production process has a lower impact on the yield rate, thereby improving the yield rate of the board assembly during production.

[0031] In some embodiments, the heat exchange element is disposed on a side of the first plate body facing away from the base plate.

[0032] In the above technical method, the heat on the heating element is transferred to the heat exchange element with a more uniform distribution. After the heat exchange element is acted upon by the heating element, the temperature difference on the heating element is smaller, which can reduce the probability of damage to the heat exchange element during operation and improve the reliability of the heat exchange element.

[0033] In some embodiments, a portion of the surface of the first plate body on a side away from the base plate is recessed toward the base plate to form a mounting groove, and the heat exchange component is disposed in the mounting groove.

[0034] In the above technical method, on the one hand, the difficulty of assembly can be reduced and the stability of the plate assembly during operation can be improved. On the other hand, the size of the plate assembly in the thickness direction can be reduced, thereby reducing the difficulty of arranging the plate assembly on the battery device, and the heating efficiency of the heating element to the heat exchange element can be improved, further improving the heating rate of the battery device.

[0035] In some embodiments, the heat exchange element includes a heat exchange tube, which includes a plurality of first tube segments and a plurality of second tube segments, the first tube segments extend along a first direction, the second tube segments extend along a second direction, the first direction, the second direction and the thickness direction of the first plate body intersect each other, and the first tube segments and the second tube segments are connected in sequence.

[0036] In the above technical manner, the rate at which the heat exchange element regulates the temperature of the components inside the battery box can be increased, and the uniformity of the temperature regulation of the components inside the battery box by the heat exchange element can be increased.

[0037] In some embodiments, in the thickness direction of the plate assembly, the first heating assembly is disposed opposite to the battery cell assembly.

[0038] In the above technical approach, the first heating assembly has a high efficiency in heating the battery cell assembly and can reduce the impact of the first heating assembly on other areas, thereby further improving the reliability of the battery device during operation.

[0039] In some embodiments, electrical components are also arranged in the battery box, and the battery device also includes: a second heating component, which is arranged between the first plate body and the second plate body, and in the thickness direction of the plate body component, the second heating component is arranged opposite to the electrical component.

[0040] In the above technical approach, the working efficiency of the battery device in a low temperature environment can be further improved.

[0041] In some embodiments, the second plate has a fixing portion, the battery device is suitable for being fixedly connected to the electrical device through the fixing portion, the fixing portion has a convex portion on the surface of the second plate facing the first plate, and the first heating component has an avoidance portion opposite to the convex portion.

[0042] In the above technical manner, by providing the fixing portion, on the one hand, the difficulty of assembling the battery device on the electrical device can be reduced, and on the other hand, the stability of the battery device on the electrical device can be improved.

[0043] In a second aspect, an embodiment of the present application provides a battery case, comprising: a plate assembly, wherein the plate assembly comprises a first plate, a second plate and a first heating assembly, wherein the first plate and the second plate are stacked, and the first heating assembly is disposed between the first plate and the second plate.

[0044] In the above technical manner, according to the battery case of the embodiment of the present application, the battery cell assembly can be heated in a low temperature environment, thereby improving the working efficiency of the battery device in a low temperature environment.

[0045] In a third aspect, an embodiment of the present application provides an electrical device, comprising: a battery device according to the first aspect of the present application, or a battery box according to the second aspect of the present application.

[0046] In the above technical manner, according to the electrical device of the embodiment of the present application, by providing a battery device according to the first aspect of the present application, or a battery box according to the second aspect of the present application, the working efficiency of the electrical device in a low temperature environment can be improved, and the reliability of the electrical device during operation is high.

[0047] 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

[0048] Figure 1 is a schematic diagram of an electrical device according to an embodiment of the present application; Figure 2 is an exploded view of a battery box according to an embodiment of the present application; Figure 3 is a schematic diagram of a first heating assembly, a second heating assembly, and a second plate according to an embodiment of the present application; Figure 4 yes Figure 2 A schematic diagram of a first heating assembly shown in ; Figure 5 is a schematic diagram of a first heating assembly, a second heating assembly, and a second plate according to another embodiment of the present application; Figure 6 is a schematic diagram of a first heating assembly according to an embodiment of the present application; Figure 7 yes Figure 6 An enlarged view of A shown in FIG.

[0049] Reference numerals: 1. Electrical devices; 1000, battery device; 2000, controller; 3000, motor; 100. Battery box; 10. Board assembly; 11. first plate; 111. mounting groove; 12. first heating assembly; 121. heating element; 1211. lead-out section; 122. substrate; 1221. single plate; 1222. first avoidance hole; 1223. fastener; 123. heat-conducting layer; 124. adhesive layer; 125. lead-out section; 13. second plate; 131. receiving groove; 132. convex portion; 1321. fixing hole; 14. heat exchange element; 141. first pipe section; 142. second pipe section; 15. A second heating component; 20. Framework. DETAILED DESCRIPTION

[0050] The following embodiments of the technical solution of the present application will be 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0055] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using 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.

[0060] The battery device involves relatively complex electrochemical reactions during the charging and discharging process. In related technologies, when the battery device is in a low-temperature environment and its temperature is low, the efficiency of the electrochemical reaction in the battery device is low, resulting in low working efficiency of the battery in the low-temperature environment.

[0061] Based on the above considerations, in order to improve the working efficiency of the battery device in a low-temperature environment, the applicant has designed a battery device after in-depth research, in which a plate assembly with an integrated first heating assembly is set in the battery case of the battery device, and the battery device is actively heated in a low-temperature environment, so that the battery device quickly reaches a high-activity state, thereby improving the working efficiency of the battery device in a low-temperature environment.

[0062] The embodiment of the present application provides an electric device using the battery device 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 computer, 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.

[0063] For the convenience of explanation, the following embodiments take the electric device 1 as a vehicle as an example, and describe in detail the structures of the electric device 1, the battery device 1000 and the battery box of the present application.

[0064] Please refer to Figure 1 , Figure 1 The power device 1 provided for some embodiments of the present application is a structural schematic diagram of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery device 1000, and the battery device 1000 can be arranged at the bottom, head or tail of the vehicle. The battery device 1000 can be used for powering the vehicle, for example, the battery device 1000 can be used as an operating power source for the vehicle. The vehicle may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery device 1000 to power the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present application, the battery device 1000 can be used not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0065] Figure 2 is an exploded view of a battery box according to an embodiment of the present application, Figure 3 is a schematic diagram of a first heating assembly, a second heating assembly, and a second plate according to an embodiment of the present application; Figure 4 yes Figure 2 A schematic diagram of a first heating assembly shown in ; Figure 5 is a schematic diagram of a first heating assembly, a second heating assembly, and a second plate according to another embodiment of the present application; Figure 6 is a schematic diagram of a first heating component according to an embodiment of the present application, Figure 7 yes Figure 6 An enlarged view of A shown in FIG.

[0066] Reference below Figure 2-Figure 7 A battery device 1000 according to an embodiment of the first aspect of the present application is described.

[0067] like Figure 2-Figure 3 As shown, the battery device 1000 includes: a battery cell assembly and a battery case 100 .

[0068] Specifically, the battery cell assembly is arranged in a battery case 100, and the battery case 100 includes a plate assembly 10, and the plate assembly 10 includes a first plate 11, a second plate 13, a first heating assembly 12 and a heat exchanger 14. The first plate 11 and the second plate 13 are stacked, and the first plate 11 is located on a side of the second plate 13 close to the battery cell assembly. The first heating assembly 12 is arranged between the first plate 11 and the second plate 13 for heating the battery cell assembly, and the heat exchanger 14 is arranged on a side of the second plate 13 facing the battery cell assembly.

[0069] Exemplarily, the battery cell assembly includes a plurality of battery cells, which are arranged in the thickness direction of the plate assembly 10 (eg Figure 2 In the up-down direction shown in ), the plate assembly 10 is opposite to the battery cell assembly. The plate assembly 10 can be arranged on the lower side of the battery cell assembly, the plate assembly 10 can also be arranged on the upper side of the battery cell assembly, or the plate assembly 10 can also be arranged on the side of the battery cell assembly.

[0070] The heating element 121 may be an electric heating element, a chemical heating element, an electromagnetic heating element, etc. The above is only an example. In actual applications, other heat sources that can generate heat may also be used as the heating element 121 according to product design requirements.

[0071] When the board assembly 10 is assembled to the battery device 1000, the board assembly 10 can serve as a packaging board for the battery device 1000. On the one hand, the board assembly 10 can provide support for the components in the battery case 100, such as battery cells, buses or other functional units, so that the components in the battery device 1000 maintain a stable relative posture during operation, thereby maintaining the normal working state of the battery device 1000. On the other hand, the board assembly 10 can provide protection for the components in the battery case 100 to prevent external foreign objects from damaging the components in the battery case 100.

[0072] It is understandable to those skilled in the art that during the operation of the battery device 1000, electrochemical reactions will occur in the battery cells. When the temperature of the battery cells is low, the efficiency of the electrochemical reactions in the battery cells is low, resulting in low operating efficiency of the battery device 1000. The operation of the battery device 1000 includes: the process of discharging the battery device 1000 and the process of charging the battery device 1000.

[0073] In this embodiment, by arranging the first heating component 12 in the plate assembly 10, when the battery device 1000 operates in a low-temperature environment and the temperature of the battery cell is low, the first heating component 12 generates heat, and the heat is transferred to the first plate 11, and the first plate 11 heats the battery cell assembly. As a result, the battery device 1000 can be heated at a faster rate in a low-temperature environment, so that the electrochemical reaction substances in the battery cell can quickly reach a high-efficiency state, thereby improving the working efficiency of the battery device 1000 in a low-temperature environment.

[0074] Wherein, a first plate 11 and a second plate 13 are respectively arranged on both sides of the first heating component 12. When heat is transferred inwardly, it is first transferred to the first plate 11, and the heat is first diffused on the first plate 11, which can improve the uniformity of heating of multiple battery cells, make the temperature of multiple battery cells in the battery device 1000 rise more evenly, and reduce the probability of local heat concentration damaging the internal components of the battery device 1000. Similarly, when heat is transferred outwardly, it is first transferred to the second plate 13, and the heat is first diffused on the second plate 13, which reduces the probability of local heat concentration damaging other components.

[0075] During operation of the heat exchange element 14, the heat exchange medium flows in the heat exchange element 14 to achieve heat exchange with the components in the battery box 100. The heat exchange element 14 and the substrate 122 can be located on the same side of the first plate 11 in the thickness direction, or the heat exchange element 14 and the substrate 122 can be located on both sides of the first plate 11 in the thickness direction.

[0076] When the heat exchanger 14 and the substrate 122 are located on the same side of the first plate body 11 in the thickness direction, the heat exchanger 14 may be located between the substrate 122 and the second plate body 13 , or the substrate 122 may be located between the heat exchanger 14 and the second plate body 13 .

[0077] During the operation of the battery device 1000, the heat exchange element 14 exchanges heat with components on the battery device 1000 to adjust the temperature of the battery device 1000. The heat exchange element 14 can absorb heat from the battery device 1000 to cool the battery device 1000, and can also release heat to heat up the battery device 1000.

[0078] Compared with forming a heat exchange channel in the first plate body 11 or the second plate body 13, a heat exchange component 14 is separately provided. On the one hand, the side wall thickness of the heat exchange channel in the heat exchange component 14 can be made thicker. During the operation of the battery device 1000, the probability of the side wall of the heat exchange channel being broken is lower, which can further improve the reliability of the battery device 1000 during operation. On the other hand, the arrangement position of the heat exchange component 14 is more flexible. During the product design process, it is easier to arrange the heat exchange component 14 on the plate assembly 10, thereby reducing the difficulty of product design.

[0079] According to the battery device 1000 of the first aspect embodiment of the present application, the battery cell assembly can be heated when the temperature of the battery device 1000 is low, so that the electrochemical reaction substances in the battery cell quickly reach a high activity state, thereby improving the working efficiency of the battery device 1000 in a low temperature environment, and the first plate 11 can increase the heat release area, improve the uniformity of heating the battery cell assembly, and reduce the probability of thermal runaway caused by local overheating of the battery cell during heating. By setting the heat exchanger 14, on the one hand, the range of temperature control of the battery device 1000 can be increased, and the reliability of the battery device 1000 during operation can be further improved. When the heat exchanger 14 can heat the battery device 1000, the heating rate of the battery cell assembly in a low temperature environment can be further increased. On the other hand, the heat exchanger 14 has high reliability and low layout difficulty.

[0080] In some embodiments, the first heating assembly 12 includes: a heating element 121 and a substrate 122 , and the heating element 121 is disposed on the substrate 122 .

[0081] It can be understood that compared with the contact area between the heating element 121 and the first plate body 11 and the second plate body 13, the contact area between the substrate 122 and the first plate body 11 and the second plate body 13 is larger. In this way, the heat on the heating element 121 is transferred to the first plate body 11 and the second plate body 13 through the substrate 122, which can further improve the uniformity of the temperature distribution of the first plate body 11 and the second plate body 13, thereby further improving the uniformity of the temperature rise of the battery cell and further reducing the probability of the plate assembly 10 damaging surrounding components.

[0082] At the same time, the board assembly 10 is provided with three boards, namely, a first board 11, a substrate 122 and a second board 13. The structural strength of the board assembly 10 is relatively high, and the first board 11, the substrate 122 and the second board 13 can all protect the battery device 1000. During the operation of the battery device 1000, the probability of protection failure of the board assembly 10 is relatively low, which can improve the reliability of the battery device 1000 during operation.

[0083] In some embodiments, Figure 3-Figure 5 As shown, the heating element 121 is disposed in the substrate 122 .

[0084] When the heating element 121 heats the battery device 1000, the heating element 121 generates heat, and the heat on the heating element 121 is transferred from the inside of the substrate 122 to the substrate 122, and then transferred to the first plate body 11 through the substrate 122. Then, the first plate body 11 transfers the heat to the components in the battery case 100, thereby achieving heating of the battery device 1000.

[0085] The substrate 122 may wrap the heating element 121 so that the heating element 121 is disposed in the substrate 122 , or an installation space may be provided in the substrate 122 and the heating element 121 may be disposed in the installation space.

[0086] By disposing the heating element 121 in the substrate 122 , the uniformity of heat distribution on the substrate 122 can be improved, thereby improving the uniformity of heat distribution on the first plate body 11 , thereby further improving the uniformity of temperature rise of the battery device 1000 .

[0087] In some embodiments, Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, a heat-conducting layer 123 is disposed on a side of the substrate 122 facing the first plate body 11 , and the heating element 121 is disposed in the heat-conducting layer 123 .

[0088] When the heating element 121 heats the battery cell assembly, the heating element 121 generates heat, and the heat on the heating element 121 is transferred to the first plate 11 through the heat conductive layer 123, and then the first plate 11 transfers the heat to the battery cell assembly, thereby achieving heating of the battery cell assembly.

[0089] It should be noted that the thermal conductivity of the heat conductive layer 123 is better than that of the substrate 122. In this embodiment, by providing the heat conductive layer 123, the uniformity of heat distribution on the first plate 11 can be improved, thereby further improving the uniformity of the temperature rise of the battery cell assembly.

[0090] In some embodiments, the heat conductive layer 123 is a polyimide layer, or the heat conductive layer 123 is a silicone layer.

[0091] Among them, polyimide materials and silicone materials have strong thermal stability and good flexibility. In this embodiment, by setting the thermal conductive layer 123 as a polyimide layer, or the thermal conductive layer 123 as a silicone layer, on the one hand, the service life of the thermal conductive layer 123 is longer, which can improve the reliability of the battery device 1000 during operation. On the other hand, the thermal conductive layer 123 can absorb part of the vibration on the battery device 1000, thereby improving the stability of the battery device 1000 during operation.

[0092] In some embodiments, there are multiple heating elements 121, for example, the heating elements 121 may be two, three, four or ten, and the multiple heating elements 121 include at least one first heating element and at least one second heating element. For example, the first heating element may be one, two, three or four, and the second heating element may be two, three or four. The first heating element is arranged along a first direction (for example Figure 5 The second heating element extends in a second direction (eg, Figure 5 The first direction, the second direction, and the thickness direction of the substrate 122 (eg, Figure 5 The upper and lower directions (as shown in the figure) intersect each other, and the first heating element and the second heating element are arranged crosswise.

[0093] During the process of the heating element 121 heating the battery device 1000, the heat generated by the first heating element extending along the first direction will diffuse to both sides of the second direction while being transferred to the first plate body 11. Similarly, the heat generated by the second heating element extending along the second direction will diffuse to both sides of the first direction while being transferred to the first plate body 11. The heat generated by the first heating element and the second heating element heats the battery cell assembly through the first plate body 11, and the heat transferred from the first plate body 11 to the battery cell assembly is more evenly distributed.

[0094] By providing the first heating element and the second heating element in a cross-arrangement, the uniformity of the temperature rise of the battery cell assembly can be further improved.

[0095] In some embodiments, there are a plurality of first heating elements, and the plurality of first heating elements are arranged at intervals in the second direction; and / or there are a plurality of second heating elements, and the plurality of second heating elements are arranged at intervals in the first direction.

[0096] That is to say, there may be multiple first heating elements, and the multiple first heating elements are arranged at intervals in the second direction; there may be multiple second heating elements, and the multiple second heating elements are arranged at intervals in the first direction; there may also be multiple first heating elements and multiple second heating elements, and the multiple first heating elements are arranged at intervals in the second direction, and the multiple second heating elements are arranged at intervals in the first direction.

[0097] In the present embodiment, the first heating element and the second heating element are both provided for illustration. When the heating element 121 heats the battery device 1000, the heat generated by each first heating element will diffuse to both sides of the second direction while being transferred to the first plate body 11. The heat generated by each second heating element will diffuse to both sides of the first direction while being transferred to the first plate body 11. The heat generated by the multiple first heating elements and the multiple second heating elements heats the battery cell assembly via the first plate body 11, and the uniformity of heating the battery cell assembly by the first plate body 11 can be further improved.

[0098] By providing a plurality of first heating elements and a plurality of second heating elements, the uniformity of the temperature rise of the battery cell assembly can be further improved.

[0099] In some embodiments, multiple heating elements 121 are connected in parallel.

[0100] Exemplarily, the heating element is an electric heating wire. When the battery device 1000 needs to be heated, current is connected to the heating element 121. Under the action of the current, the heating element 121 generates heat. The heat on the heating element 121 is transferred to the components in the battery box 100 through the first plate 11, thereby heating the battery device 1000.

[0101] Among them, multiple heating elements 121 are connected in parallel. During the heating process of the battery device 1000, the current of the heating element 121 in a certain area can be turned on separately to perform fixed-point heating of the battery cell assembly. The heating efficiency of each heating element 121 can also be controlled according to the temperature distribution area of ​​each area of ​​the battery device 1000, so that the heating efficiency of each heating element 121 is adapted to the temperature of the battery cell in the corresponding area, thereby further improving the uniformity of the temperature rise of the battery cell assembly and realizing differentiated heating of the battery cell assembly.

[0102] By using the heating element 121 as an electric heating element and connecting multiple electric heating elements in parallel, the electric heating elements are easy to arrange and the heating power of the electric heating elements is easy to control, which can reduce the production difficulty and design difficulty of the battery device 1000. At the same time, the heating process of the battery device 1000 can be optimized and the uniformity of the temperature rise of the battery device 1000 can be further improved.

[0103] In some embodiments, Figure 5 As shown, the base plate 122 is a one-piece piece.

[0104] During the assembly process, the base plate 122 of the integrated component moves less frequently, which can simplify the assembly steps. After the assembly is completed, the base plate 122 of the integrated component has a higher structural strength, and the base plate 122 can withstand greater impact force.

[0105] By configuring the substrate 122 as an integral piece, the assembly steps of the board assembly 10 can be simplified, and the protection effect of the board assembly 10 on the battery device 1000 can be improved.

[0106] In some embodiments, Figure 3 and Figure 4 As shown, the substrate 122 includes a plurality of single plates 1221 . For example, the number of the single plates 1221 may be two, four, six or nine, and the plurality of single plates 1221 are arranged in a matrix.

[0107] During the design of the board assembly 10 , when the size of the base plate 122 needs to be adjusted, it can be achieved by adjusting the number of the single plates 1221 , thereby reducing the design difficulty of the board assembly 10 .

[0108] During the assembly of the board assembly 10 , the assembly sequence of the plurality of individual boards 1221 can be adjusted according to the assembly space requirements, thereby reducing the difficulty of assembling the board assembly 10 .

[0109] By forming the base plate 122 with a plurality of single plates 1221 , the design difficulty and assembly difficulty of the plate assembly 10 can be reduced.

[0110] In some embodiments, Figure 2 and Figure 7 As shown, the second plate body 13 and the base plate 122 are bonded and connected.

[0111] During the assembly process, adhesive material is applied on the second plate body 13 or the substrate 122, and then the second plate body 13 and the substrate 122 are bonded together to achieve the connection between the second plate body 13 and the substrate 122. After the adhesive material between the second plate body 13 and the substrate 122 solidifies, an adhesive layer 124 can be formed between the second plate body 13 and the substrate 122.

[0112] Thus, the production difficulty of the plate assembly 10 can be reduced, and the strength of the adhesive connection is higher, which makes it easier to make the connection strength between the second plate body 13 and the base plate 122 meet the design requirements.

[0113] When the battery device 1000 vibrates during operation, the adhesive layer 124 can absorb a portion of the vibration on the battery device 1000 .

[0114] Therefore, the stability of the battery device 1000 during operation can be further improved.

[0115] In some embodiments, Figure 2 and Figure 3 As shown, part of the surface of the second plate body 13 facing the substrate 122 is recessed in a direction away from the substrate 122 to form a receiving groove 131. The substrate 122 is disposed in the receiving groove 131, and the periphery of the first plate body 11 is connected to the periphery of the receiving groove 131.

[0116] During the assembly process, the receiving groove 131 can provide positioning for the substrate 122, so that the substrate 122 can be quickly installed on the second plate body 13, and the position accuracy of the substrate 122 on the second plate body 13 is high after the assembly is completed. During the operation of the battery device 1000, when vibration is generated on the battery device 1000 and the substrate 122 is relatively displaced relative to the second plate body 13, the side wall of the receiving groove 131 can abut against the substrate 122, thereby preventing the substrate 122 from being relatively displaced with the second plate body 13.

[0117] By disposing the substrate 122 in the receiving groove 131 on the second plate body 13 , the difficulty of assembly can be reduced, the position accuracy of the substrate 122 after assembly can be improved, and the stability of the plate assembly 10 during the operation of the battery device 1000 can be improved.

[0118] Among them, the substrate 122 can partially extend into the receiving groove 131, that is, the end of the substrate 122 away from the bottom wall of the receiving groove 131 exceeds the edge of the receiving groove 131, and the substrate 122 can also be completely located in the receiving groove 131, that is, the end of the substrate 122 away from the bottom wall of the receiving groove 131 does not exceed the edge of the receiving groove 131.

[0119] After the substrate 122 is assembled into the accommodating groove 131 on the second plate body 13, the space occupied by the substrate 122 in the thickness direction of the second plate body 13 will at least partially overlap with the space occupied by the second plate body 13. Thus, the space occupied by the plate body assembly 10 in the thickness direction can be reduced, thereby facilitating the arrangement of the plate body assembly 10 on the battery device 1000.

[0120] In some embodiments, Figure 3-Figure 6As shown, the heating element 121 has a lead-out section 1211 , and in a direction perpendicular to the thickness direction of the substrate 122 , the lead-out section 1211 extends out of the outer edge of the substrate 122 .

[0121] During the assembly of the battery device 1000 , the lead section 1211 is connected to other components that realize the heating function of the heating element 121 . For example, when the heating element 121 is an electric heating wire, the lead section 1211 is connected to the power line of the heating element 121 .

[0122] By providing the lead-out section 1211 , during the design and assembly of the battery device 1000 , only the connection between the lead-out section 1211 and the component that realizes the heating function of the heating element 121 needs to be considered, which can reduce the design and assembly difficulty of the battery device 1000 .

[0123] In some embodiments, Figure 3-Figure 5 As shown, the substrate 122 has a lead-out portion 125 . In a direction perpendicular to the thickness direction of the substrate 122 , the lead-out portion 125 protrudes outward from the outer edge of the substrate 122 , and the lead-out section 1211 extends outward from the lead-out portion 125 .

[0124] During the process of arranging the heating element 121 on the substrate 122, the heating element 121 extends to the lead-out portion 125 on the substrate 122, and then extends outward from the substrate 122 along the lead-out portion 125. It is understandable that when the lead-out section 1211 is connected to other components, the connection between the lead-out section 1211 and the substrate 122 may fail or loosen, causing a gap to be generated at the connection between the lead-out section 1211 and the substrate 122. Therefore, directly leading the heating element 121 from the heating body may result in a low yield rate of the integrated components of the substrate 122 and the heating element 121.

[0125] By setting the lead-out portion 125, when a gap is generated between the lead-out section 1211 and the lead-out portion 125, the contact between the heating element 121 and the main body of the substrate 122 is still relatively sufficient, and the operation of connecting the lead-out section 1211 during the production process has a lower impact on the yield rate, thereby improving the yield rate of the board assembly 10 during production.

[0126] In some embodiments, Figure 2 and Figure 3 As shown, the heat exchange element 14 is disposed on a side of the first plate body 11 facing away from the base plate 122 .

[0127] The heat exchange element 14 and the heating element 121 can work simultaneously, or the heat exchange element 14 and the heating element 121 can work separately.

[0128] It is understandable that when the temperature difference on the heat exchanger 14 is large, that is, when the layout temperature of the heat exchanger 14 is high, the deformation degree of each part of the heat exchanger 14 is quite different, the stress on the heat exchanger 14 will be relatively large, and the probability of damage to the heat exchanger 14 will increase, affecting the reliability of the heat exchanger 14 during operation.

[0129] In this embodiment, by arranging the heat exchange element 14 and the heating element 121 on both sides of the first plate body 11 respectively, during the operation of the battery device 1000, the heat generated by the heating element 121 is transferred to the heat exchange element 14 through the first plate body 11. As a result, the heat on the heating element 121 is distributed more evenly when transferred to the heat exchange element 14. After the heat exchange element 14 is acted upon by the heating element 121, the temperature difference on the heating element 121 is small, which can reduce the probability of damage of the heat exchange element 14 during operation and improve the reliability of the heat exchange element 14.

[0130] In addition, the heat exchange efficiency between the heat exchange element 14 and the components in the battery case 100 is relatively high. When the heating element 121 heats the components in the battery case 100, the heat on the heating element 121 is transferred to the heat exchange element 14 through the first plate 11, and the heat exchange element 14 exchanges heat with the components in the battery case 100. The heat exchange element 14 has a relatively high heating efficiency for the components in the battery case 100, which can further improve the heating efficiency of the battery device 1000.

[0131] In some embodiments, Figure 2 and Figure 3 As shown, a portion of the surface of the first plate body 11 on a side away from the base plate 122 is recessed toward the base plate 122 to form a mounting groove 111 , and the heat exchange element 14 is disposed in the mounting groove 111 .

[0132] During the assembly of the plate assembly 10, the mounting groove 111 can quickly position the heat exchanger 14, so that the heat exchanger 14 can be quickly and accurately assembled into place, and the assembly accuracy of the heat exchanger 14 on the first plate 11 can be improved. During the operation of the battery device 1000, when the vibration on the battery device 1000 is transmitted to the heat exchanger 14, the inner wall of the mounting groove 111 can prevent the movement of the heat exchanger 14, thereby improving the stability of the plate assembly 10 during operation.

[0133] By arranging the heat exchange element 14 in the installation groove 111 , the difficulty of assembly can be reduced and the stability of the plate assembly 10 during operation can be improved.

[0134] The heat exchange element 14 can partially extend into the mounting groove 111, that is, one end of the heat exchange element 14 away from the bottom wall of the mounting groove 111 exceeds the edge of the mounting groove 111, and the heat exchange element 14 can also be completely located in the mounting groove 111, that is, one end of the heat exchange element 14 away from the bottom wall of the mounting groove 111 does not exceed the edge of the mounting groove 111.

[0135] Therefore, after the plate assembly 10 is assembled, in the thickness direction of the first plate 11, the space occupied by the heat exchanger 14 at least partially overlaps with the space occupied by the first plate 11. In this way, the size of the plate assembly 10 in the thickness direction can be reduced, thereby reducing the difficulty of arranging the plate assembly 10 on the battery device 1000.

[0136] In addition, during the heating process of the heating element 121, the heat on the heating element 121 is transferred to the first plate body 11, and the first plate body 11 transfers the heat to the heat exchange element 14 through the inner wall of the mounting groove 111. The heating element 121 has a high heating efficiency for the heat exchange element 14, so that the heat exchange element 14 has a high heating efficiency for the battery cell assembly, further improving the heating rate of the battery cell assembly.

[0137] In some embodiments, the heat exchange element 14 is disposed on a side of the first plate body 11 facing the base plate 122 .

[0138] The heat exchange element 14 may be located on a side of the substrate 122 away from the second plate body 13 , or may be located on a side of the substrate 122 facing the second plate body 13 .

[0139] Exemplarily, when the heat exchange element 14 is located on the side of the substrate 122 facing the second plate body 13, the heating element 121 is an electric heating wire, and there are multiple heating elements 121, the heat exchange element 14 includes a heat exchange tube, the heat exchange tube has multiple first tube segments 141 and multiple second tube segments 142, and the multiple heating elements 121 and the multiple first tube segments 141 are arranged alternately. In this way, the heating elements 121 and the heat exchange element 14 are distributed relatively evenly, and the heating and heat exchange of the battery device 1000 are relatively even.

[0140] The first plate 11 can provide protection between the heat exchange element 14 and the components in the battery case 100. During the operation of the battery device 1000, when the heat exchange element 14 fails to seal the heat exchange medium in the heat exchange element 14 and the heat exchange medium flows out, the first plate 11 can prevent the heat exchange medium from contacting the components in the battery case 100, thereby improving the safety of the battery device 1000 during operation.

[0141] During the product design process, the location of the heat exchange element 14 can be adjusted to meet more product design requirements.

[0142] In some embodiments, Figure 2As shown, the heat exchange member 14 includes a heat exchange tube, and the heat exchange tube includes a plurality of first tube segments 141 and a plurality of second tube segments 142. For example, the first tube segments 141 may be two, three or four, and the second tube segments 142 may be two, three or four. The first tube segments 141 extend along a first direction, and the second tube segments 142 extend along a second direction. The first direction, the second direction and the thickness direction of the first plate body 11 intersect each other, and the first tube segments 141 and the second tube segments 142 are connected in sequence.

[0143] Exemplarily, the heat exchange tube is arranged on the first plate body 11 and is located on the side of the first plate body 11 away from the substrate 122. A plurality of first tube segments 141 and second tube segments 142 extending in different directions constitute the heat exchange tube, which can improve the distribution density of the heat exchange tube on the first plate body 11 and improve the uniformity of the distribution of the heat exchange tube on the first plate body 11. Thus, the rate at which the heat exchange tube regulates the temperature of the battery monomer assembly can be increased, and the uniformity of the heat exchange tube regulating the temperature of the battery monomer assembly can be increased.

[0144] Among them, preferably, the first pipe section 141 and the second pipe section 142 are connected in an arc, thereby allowing the heat exchange medium to flow more smoothly in the heat exchange tube, making the fluid pressure distribution in the heat exchange tube more uniform, reducing the probability of vortex generation in the heat exchange tube, and thus improving the working effect of the heat exchange tube.

[0145] The projections of the multiple first tube segments 141 in the second direction overlap, so that the heat exchange tubes are more concentratedly distributed on the first plate 11 , which can further improve the rate and uniformity of the heat exchange tubes regulating the temperature of the internal components of the battery box 100 .

[0146] In some embodiments, the substrate 122 is a polycarbonate board, an epoxy board, a composite material board or a foam material board, so that, on the one hand, the structural strength of the substrate 122 is relatively high, and it is easier to make the strength of the substrate 122 meet the protection requirements of the board assembly 10, and on the other hand, the chemical properties of the substrate 122 are relatively stable, and the state of the substrate 122 is relatively stable under the continuous action of the heating element 121. In the process of product design, the material of the substrate 122 can be selected according to the product design requirements.

[0147] In some embodiments, the first plate body 11 is a steel plate, which has a high structural strength. During the product design process, it is easier to make the structural strength of the first plate body 11 meet the design requirements, and the chemical properties of the steel plate are relatively stable. During the operation of the plate body assembly 10, the state of the first plate body 11 is relatively stable.

[0148] In some embodiments, in the thickness direction of the plate assembly 10 , the first heating assembly 12 is disposed opposite to the battery cell assembly.

[0149] During the operation of the first heating component 12, the heat generated by the first heating component 12 will diffuse to the surroundings. It can be understood that in the direction opposite to the first heating component 12, the heat distribution is more concentrated. In this way, the first heating component 12 has a higher efficiency in heating the battery cell assembly and can reduce the impact of the first heating component 12 on other areas, thereby further improving the reliability of the battery device 1000 during operation.

[0150] In some embodiments, the first heating assembly 12 includes a heating element 121, that is, the heating element 121 is directly arranged between the first plate body 11 and the second plate body 13. During the process of the first heating assembly 12 heating the battery cell assembly, the heating element 121 generates heat, and the heat is transferred to the battery cell assembly through the first plate body 11, thereby achieving heating of the battery cell assembly, and the structure of the plate body assembly 10 is relatively simple, which can reduce the production difficulty and design difficulty of the plate body assembly 10.

[0151] In some embodiments, electrical components are also arranged in the battery box 100, and the battery device 1000 also includes: a second heating component 15, which is arranged between the first plate 11 and the second plate 13, and in the thickness direction of the plate component 10, the second heating component 15 is arranged opposite to the electrical components.

[0152] Exemplarily, the second heating component 15 includes an electrical heating element and an electrical heating substrate, wherein the electrical heating element is arranged on the electrical heating substrate, wherein the electrical heating element can be arranged in the electrical heating substrate, and the side of the electrical heating substrate facing the electrical element can also be provided with an electrical thermal conductive layer, and the electrical heating element is arranged in the electrical thermal conductive layer.

[0153] It can be understood that some parts on the electrical components have higher efficiency within a suitable temperature range. When the battery device 1000 is in a low-temperature environment, the second heating component 15 generates heat, and the heat is transferred to the electrical components through the first plate 11. Thus, the electrical components can be heated and quickly reach a high-efficiency state, thereby further improving the working efficiency of the battery device 1000 in a low-temperature environment. In addition, the first plate 11 can increase the heating area, reduce the probability of local high temperature on the electrical components, causing damage to the electrical components or short circuits, and further improve the reliability of the battery device 1000 during operation.

[0154] In some embodiments, Figure 1 and Figure 2 As shown, the second plate 13 has a fixing portion, and the battery device 1000 is suitable for being fixedly connected to the electrical device 1 through the fixing portion. The fixing portion has a protrusion 132 on the surface of the second plate 13 facing the first plate 11, and the first heating component 12 has an avoidance portion opposite to the protrusion 132.

[0155] Exemplarily, when the first heating assembly 12 includes a heating element 121 and a substrate 122, a first avoidance hole 1222 is provided on the substrate 122, and the first avoidance hole 1222 is formed as an avoidance portion. When the first heating assembly 12 includes only the heating element 121, the heating element 121 and the convex portion 132 are staggered, and the space between the heating element 121 and the convex portion 132 is formed as an avoidance portion. A second avoidance hole and a third avoidance hole are formed on the first plate body 11 and the frame 20, respectively.

[0156] The protrusion 132 is provided with a fixing hole 1321 . When the battery device 1000 is assembled on the electrical device 1 , the fastener 1223 passes through the fixing hole 1321 , the first avoidance hole 1222 , the second avoidance hole and the third avoidance hole in sequence to achieve the connection between the battery device 1000 and the electrical device 1 .

[0157] Among them, by providing a protrusion 132 on the fixing portion, on the one hand, the structural strength of the fixing portion can be improved, and on the other hand, on the side of the second plate body 13 away from the first plate body 11, the protrusion 132 will form an accommodating space. After the fastener 1223 is connected, the fastener 1223 can be arranged in the accommodating space. In this way, the side of the second plate body 13 away from the first plate body 11 is relatively flat, which can reduce the difficulty of arranging the battery device 1000.

[0158] According to the battery box 100 of the second embodiment of the present application, Figure 2 As shown, it includes: a plate assembly 10, the plate assembly 10 includes a first plate 11, a second plate 13 and a first heating assembly 12, the first plate 11 and the second plate 13 are stacked, and the first heating assembly 12 is arranged between the first plate 11 and the second plate 13.

[0159] Exemplarily, the battery cell further includes a frame 20 , and the plate assembly 10 is covered on one end of the frame 20 .

[0160] After the battery device 1000 is assembled, the battery cell assembly is assembled in the battery case 100. During the operation of the battery device 1000, the battery case 100 provides support for the battery cell assembly and other functional units, so that the battery device 1000 maintains a stable posture to operate normally. In addition, the battery case 100 can protect the components inside the battery case 100, thereby improving the reliability of the battery device 1000 during operation.

[0161] In a low-temperature environment, the plate assembly 10 can heat the battery cell assembly to improve the working efficiency of the battery device 1000 in a low-temperature environment.

[0162] According to the battery case 100 of the second embodiment of the present application, the battery device 1000 can be heated in a low-temperature environment to improve the working efficiency of the battery device 1000 in a low-temperature environment.

[0163] According to the electrical device 1 of the third aspect of the present application, Figure 1 As shown, it includes: the battery device 1000 according to the first embodiment of the present application, or the battery box 100 according to the second embodiment of the present application.

[0164] According to the electric device 1 according to the third aspect embodiment of the present application, by setting the battery device 1000 according to the first aspect embodiment of the present application, or the battery box 100 according to the second aspect embodiment of the present application, the working efficiency of the electric device 1 in a low temperature environment can be improved, and the reliability of the electric device 1 during operation is high.

[0165] Reference below Figure 2-Figure 7 A battery device 1000 according to a specific embodiment of the present application is described.

[0166] Embodiment 1 Battery cell assembly and battery case 100.

[0167] Specifically, the battery cell assembly is arranged in a battery case 100, and the battery case 100 includes a plate assembly 10, and the plate assembly 10 includes a first plate 11, a second plate 13 and a first heating assembly 12. The first plate 11 and the second plate 13 are stacked, and the first plate 11 is located on a side of the second plate 13 close to the battery cell assembly. The first heating assembly 12 is arranged between the first plate 11 and the second plate 13, and the first heating assembly 12 includes a substrate 122 and a heating element 121.

[0168] Part of the surface of the second plate body 13 facing the substrate 122 is recessed away from the substrate 122 to form a receiving groove 131. The substrate 122 is disposed in the receiving groove 131. The first plate body 11 is connected to the edge of the receiving groove 131. The substrate 122 is an integral part. The heating element 121 is disposed in the substrate 122. The heating element 121 is an electric heating element.

[0169] There are multiple heating elements 121, and the multiple heating elements 121 include three first heating elements and two second heating elements. The three first heating elements extend along the first direction and are arranged at intervals in the second direction, and the two second heating elements extend along the second direction and are arranged at intervals in the first direction. The first heating elements and the second heating elements are arranged crosswise, and the first direction and the second direction are perpendicular. A protruding lead-out portion 125 is provided on the outer edge of the substrate 122, and the heating element 121 has a lead-out section 1211, which passes through the lead-out portion 125 and extends outward from the lead-out portion 125, and the lead-out section 1211 is connected to the power supply of the heating element 121.

[0170] Part of the surface of the first plate body 11 on the side away from the substrate 122 is recessed toward the substrate 122 to form an installation groove 111. A heat exchange component 14 is arranged in the installation groove 111. The heat exchange component 14 is a heat exchange tube. The heat exchange tube includes eight first tube segments 141 and ten second tube segments 142. The first tube segments 141 extend along the first direction, and the eight first tube segments 141 are arranged at intervals in the second direction. The projections of the first tube segments 141 in the second direction overlap. The second tube segments 142 extend along the second direction. The first tube segments 141 and the second tube segments 142 are connected in sequence. At the ends of the heat exchange tube are two second tube segments 142, and the two second tube segments 142 are respectively connected to the inlet pipe and the outlet pipe of the heat exchange medium.

[0171] Embodiment 2 Specifically, the battery cell assembly is arranged in a battery case 100, and the battery case 100 includes a plate assembly 10, and the plate assembly 10 includes a first plate 11, a second plate 13 and a first heating assembly 12. The first plate 11 and the second plate 13 are stacked, and the first plate 11 is located on a side of the second plate 13 close to the battery cell assembly. The first heating assembly 12 is arranged between the first plate 11 and the second plate 13, and the first heating assembly 12 includes a substrate 122 and a heating element 121.

[0172] Part of the surface of the second plate body 13 on the side facing the substrate 122 is recessed away from the substrate 122 to form a receiving groove 131. The substrate 122 is arranged in the receiving groove 131. The first plate body 11 is connected to the edge of the receiving groove 131. The substrate 122 is an integral part. A polyimide layer is provided on the side of the substrate 122 facing the first plate body 11. The heating element 121 is arranged in the polyimide layer. The heating element 121 is an electric heating element.

[0173] There are multiple heating elements 121, and the multiple heating elements 121 include three first heating elements and two second heating elements. The three first heating elements extend along the first direction and are arranged at intervals in the second direction, and the two second heating elements extend along the second direction and are arranged at intervals in the first direction. The first heating elements and the second heating elements are arranged crosswise, and the first direction and the second direction are perpendicular. A protruding lead-out portion 125 is provided on the outer edge of the substrate 122, and the heating element 121 has a lead-out section 1211, which passes through the lead-out portion 125 and extends outward from the lead-out portion 125, and the lead-out section 1211 is connected to the power supply of the heating element 121.

[0174] Part of the surface of the first plate body 11 on the side away from the substrate 122 is recessed toward the substrate 122 to form an installation groove 111. A heat exchange component 14 is arranged in the installation groove 111. The heat exchange component 14 is a heat exchange tube. The heat exchange tube includes eight first tube segments 141 and ten second tube segments 142. The first tube segments 141 extend along the first direction, and the eight first tube segments 141 are arranged at intervals in the second direction. The projections of the first tube segments 141 in the second direction overlap. The second tube segments 142 extend along the second direction. The first tube segments 141 and the second tube segments 142 are connected in sequence. At the ends of the heat exchange tube are two second tube segments 142, and the two second tube segments 142 are respectively connected to the inlet pipe and the outlet pipe of the heat exchange medium.

[0175] Embodiment 3 Specifically, the battery cell assembly is arranged in a battery case 100, and the battery case 100 includes a plate assembly 10, and the plate assembly 10 includes a first plate 11, a second plate 13 and a first heating assembly 12. The first plate 11 and the second plate 13 are stacked, and the first plate 11 is located on a side of the second plate 13 close to the battery cell assembly. The first heating assembly 12 is arranged between the first plate 11 and the second plate 13, and the first heating assembly 12 includes a substrate 122 and a heating element 121.

[0176] Part of the surface of the second plate body 13 facing the substrate 122 is recessed away from the substrate 122 to form a receiving groove 131. The substrate 122 is arranged in the receiving groove 131. The first plate body 11 is connected to the edge of the receiving groove 131. The substrate 122 is an integral part. A heat-conductive silicone layer is provided on the side of the substrate 122 facing the first plate body 11. The heating element 121 is arranged in the heat-conductive silicone layer. The heating element 121 is an electric heating element.

[0177] There are multiple heating elements 121, and the multiple heating elements 121 include three first heating elements and two second heating elements. The three first heating elements extend along the first direction and are arranged at intervals in the second direction, and the two second heating elements extend along the second direction and are arranged at intervals in the first direction. The first heating elements and the second heating elements are arranged crosswise, and the first direction and the second direction are perpendicular. A protruding lead-out portion 125 is provided on the outer edge of the substrate 122, and the heating element 121 has a lead-out section 1211, which passes through the lead-out portion 125 and extends outward from the lead-out portion 125, and the lead-out section 1211 is connected to the power supply of the heating element 121.

[0178] Part of the surface of the first plate body 11 on the side away from the substrate 122 is recessed toward the substrate 122 to form an installation groove 111. A heat exchange component 14 is arranged in the installation groove 111. The heat exchange component 14 is a heat exchange tube. The heat exchange tube includes eight first tube segments 141 and ten second tube segments 142. The first tube segments 141 extend along the first direction, and the eight first tube segments 141 are arranged at intervals in the second direction. The projections of the first tube segments 141 in the second direction overlap. The second tube segments 142 extend along the second direction. The first tube segments 141 and the second tube segments 142 are connected in sequence. At the ends of the heat exchange tube are two second tube segments 142, and the two second tube segments 142 are respectively connected to the inlet pipe and the outlet pipe of the heat exchange medium.

[0179] Embodiment 4 Specifically, the battery cell assembly is arranged in a battery case 100, and the battery case 100 includes a plate assembly 10, and the plate assembly 10 includes a first plate 11, a second plate 13 and a first heating assembly 12. The first plate 11 and the second plate 13 are stacked, and the first plate 11 is located on a side of the second plate 13 close to the battery cell assembly. The first heating assembly 12 is arranged between the first plate 11 and the second plate 13, and the first heating assembly 12 includes a substrate 122 and a heating element 121.

[0180] Part of the surface of the second plate body 13 on the side facing the substrate 122 is recessed away from the substrate 122 to form a receiving groove 131. The substrate 122 is arranged in the receiving groove 131. The first plate body 11 is connected to the edge of the receiving groove 131. The substrate 122 includes twelve single plates 1221. The twelve single plates 1221 are arranged in a 3*4 matrix, wherein three rows of single plates 1221 are arranged in the first direction and four rows of single plates 1221 are arranged in the second direction. The first direction and the second direction are perpendicular. The heating element 121 is an electric heating element.

[0181] There are multiple heating elements 121, and the multiple heating elements 121 include four first heating elements and three second heating elements. The four first heating elements extend along the first direction and respectively pass through four rows of single plates 1221 arranged in the second direction. The three second heating elements extend along the second direction and respectively pass through three rows of single plates 1221 arranged in the first direction. A protruding lead-out portion 125 is provided on the outer edge of the substrate 122. The heating element 121 has a lead-out section 1211, which passes through the lead-out portion 125 and extends outward from the lead-out portion 125. The lead-out section 1211 is connected to the power supply of the heating element 121.

[0182] Part of the surface of the first plate body 11 on the side away from the substrate 122 is recessed toward the substrate 122 to form an installation groove 111. A heat exchange component 14 is arranged in the installation groove 111. The heat exchange component 14 is a heat exchange tube. The heat exchange tube includes eight first tube segments 141 and ten second tube segments 142. The first tube segments 141 extend along the first direction, and the eight first tube segments 141 are arranged at intervals in the second direction. The projections of the first tube segments 141 in the second direction overlap. The second tube segments 142 extend along the second direction. The first tube segments 141 and the second tube segments 142 are connected in sequence. At the ends of the heat exchange tube are two second tube segments 142, and the two second tube segments 142 are respectively connected to the inlet pipe and the outlet pipe of the heat exchange medium.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cell assembly; A battery case, wherein the battery cell assembly is arranged in the battery case, the battery case includes a plate assembly, the plate assembly includes a first plate, a second plate, a first heating assembly and a heat exchanger, the first plate and the second plate are stacked, and the first plate is located on a side of the second plate close to the battery cell assembly, the first heating assembly is arranged between the first plate and the second plate for heating the battery cell assembly, and the heat exchanger is arranged on a side of the second plate facing the battery cell assembly.

2. The battery device according to claim 1, characterized in that: The first heating component comprises: a heating element and a substrate, and the heating element is arranged on the substrate.

3. The battery device according to claim 2, characterized in that: The heating element is arranged in the substrate.

4. The battery device according to claim 2, characterized in that: A heat-conducting layer is disposed on a side of the substrate facing the first plate body, and the heating element is disposed in the heat-conducting layer.

5. The battery device according to claim 4, characterized in that: The heat-conducting layer is a polyimide layer, or the heat-conducting layer is a silica gel layer.

6. The battery device according to claim 2, characterized in that: There are multiple heating elements, including at least one first heating element and at least one second heating element, the first heating element extends along a first direction, the second heating element extends along a second direction, the first direction, the second direction and the thickness direction of the substrate intersect each other, and the first heating element and the second heating element are arranged crosswise.

7. The battery device according to claim 6, characterized in that: There are a plurality of first heating elements, and the plurality of first heating elements are arranged at intervals in the second direction; and / or there are a plurality of second heating elements, and the plurality of second heating elements are arranged at intervals in the first direction.

8. The battery device according to claim 6, characterized in that: A plurality of the heating elements are connected in parallel.

9. The battery device according to claim 2, characterized in that: The base plate is an integral piece.

10. The battery device according to claim 2, characterized in that: The substrate includes a plurality of monomer plates, and the plurality of monomer plates are arranged in a matrix.

11. The battery device according to claim 2, characterized in that: The second plate body and the base plate are bonded and connected.

12. The battery device according to claim 11, characterized in that: A portion of the surface of the second plate body facing the substrate is recessed in a direction away from the substrate to form a receiving groove. The substrate is disposed in the receiving groove, and the periphery of the first plate body is connected to the periphery of the receiving groove.

13. The battery device according to claim 2, characterized in that: The heating element has a lead-out section, and in a direction perpendicular to the thickness direction of the substrate, the lead-out section extends out of an outer edge of the substrate.

14. The battery device according to claim 13, characterized in that: The substrate has a lead-out portion, and in a direction perpendicular to the thickness direction of the substrate, the lead-out portion protrudes outwardly from an outer edge of the substrate, and the lead-out section extends outwardly from the lead-out portion.

15. The battery device according to claim 2, characterized in that: The heat exchange element is arranged on a side of the first plate body away from the base plate.

16. The battery device according to claim 15, characterized in that: A portion of the surface of the first plate body on a side away from the base plate is recessed toward the base plate to form a mounting groove, and the heat exchange component is arranged in the mounting groove.

17. The battery device according to claim 15, characterized in that: The heat exchange component includes a heat exchange tube, and the heat exchange tube includes a plurality of first tube segments and a plurality of second tube segments. The first tube segments extend along a first direction, and the second tube segments extend along a second direction. The first direction, the second direction, and the thickness direction of the first plate body intersect in pairs, and the first tube segments and the second tube segments are connected in sequence.

18. The battery device according to claim 1, characterized in that In the thickness direction of the plate assembly, the first heating assembly is arranged opposite to the battery cell assembly.

19. The battery device according to claim 1, characterized in that: The battery box is also provided with electrical components, and the battery device further includes: a second heating component, the second heating component is arranged between the first plate body and the second plate body, and the second heating component is arranged opposite to the electrical components in the thickness direction of the plate body component.

20. The battery device according to claim 1, characterized in that The second plate has a fixing portion, the battery device is suitable for being fixedly connected to the electrical device through the fixing portion, the fixing portion has a convex portion on the surface of the second plate facing the first plate, and the first heating component has a avoiding portion opposite to the convex portion.

21. A battery box, characterized in that: include: The plate assembly comprises a first plate, a second plate and a first heating assembly, wherein the first plate and the second plate are stacked and arranged, and the first heating assembly is arranged between the first plate and the second plate.

22. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 20, or comprising the battery case according to claim 21.

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