Battery device and electric device

Abstract

The invention is applicable to the technical field of batteries, and particularly relates to a battery device and a power utilization device. The heat exchange plate is used for circulating a heat exchange medium, the heat exchange plate comprises an insulating part, the insulating part divides the heat exchange plate into a plurality of parts which are insulated from one another and are communicated with one another through the insulating part, and the heat exchange plate is in heat-conducting contact with the plurality of single batteries; and the insulating part is at least arranged between the areas of the heat exchange plates in contact with two battery monomers with the maximum potential difference in the plurality of battery monomers. The invention aims to reduce the risk of short circuit between single batteries caused by electric conduction of heat exchange plates.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to a battery device and an electrical device. Background Technology

[0002] With the rise of new energy equipment, represented by new energy vehicles, battery devices have become a key power source. Battery devices include a casing and battery cells. Battery cells are energy storage components. Battery cells undergo charging and discharging reactions. During the charging and discharging process, the temperature of the battery cells will rise accordingly. Therefore, heat exchange is required for the battery cells to ensure that they are within the normal temperature range.

[0003] In related technologies, heat exchange is performed on battery cells using heat exchange plates. Generally, heat exchange is achieved by the heat exchange plate contacting multiple battery cells. There may be a high potential difference between different battery cells. If the insulation between the heat exchange plate and the battery cells fails, the different battery cells may conduct electricity through the heat exchange plate, resulting in a short circuit between the battery cells. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device and an electrical device, which aims to reduce the risk of short circuit between battery cells due to the conductivity of the heat exchange plate.

[0005] In a first aspect, this application provides a battery device, comprising: Battery cells; and A heat exchange plate for circulating a heat exchange medium, the heat exchange plate including an insulating portion, the insulating portion dividing the heat exchange plate into multiple mutually insulated and interconnected portions, the heat exchange plate being in thermal contact with multiple battery cells, the insulating portion being provided at least between the regions of the heat exchange plate that are in contact with the two battery cells with the largest potential difference among the multiple battery cells.

[0006] The advantage of this embodiment is that by insulating the heat exchange plate with the insulating part, the risk of electrical conduction between different battery cells through the heat exchange plate can be reduced. At the same time, the insulating part also connects the separated parts, so that the flow of the heat exchange medium is not interrupted, which is conducive to the flow of the heat exchange medium.

[0007] In one embodiment of the first aspect, the insulating portion is provided at least between the regions of the heat exchange plates that are in contact with two of the plurality of battery cells whose potential difference is greater than 80V.

[0008] This embodiment provides a critical potential difference value, that is, battery cells with a potential difference of at least 80V must contact the separated portions of the heat exchange plates on both sides of the insulation part to reduce the risk of short circuit.

[0009] In one embodiment of the first aspect, the insulating portion is disposed between the regions of the heat exchange plate that are in contact with any two of the plurality of battery cells.

[0010] In this embodiment, an insulating part is provided between the areas of the same heat exchange plate that any two battery cells contact, thereby forming relative insulation between each battery cell, which can greatly reduce the risk of electrical conduction between battery cells through the heat exchange plate.

[0011] In one embodiment of the first aspect, the heat exchange plate is disposed along a first direction, and the battery device includes at least a plurality of battery cells arranged at intervals along the first direction and in thermal contact with the heat exchange plate.

[0012] This embodiment provides a heat exchange plate and a corresponding arrangement of multiple battery cells, which is beneficial for heat dissipation and for the corresponding selection of the position of the insulation part. The setting position can be selected based on the potential relationship of the battery cells arranged in the same direction.

[0013] In one embodiment of the first aspect, the number of the plurality of battery cells arranged along the first direction is M and they are connected in series in the conductive line according to the arrangement order in the first direction. The insulating portion is provided at least between the regions of the heat exchange plates that are in contact with the Nth and N+1th battery cells arranged along the first direction. If M is an even number, then N is M / 2. If M is an odd number, then N is (M-1) / 2 or (M+1) / 2.

[0014] The advantage of this embodiment is that it achieves insulation isolation on the heat exchange plate between at least two groups of battery cells with large potential differences, which can reduce the risk of short circuit.

[0015] In one embodiment of the first aspect, the insulating portion divides the heat exchange plate into a plurality of mutually insulated sub-heat exchange plates that are interconnected through the insulating portion, and the plurality of battery cells are in thermally conductive contact with the plurality of sub-heat exchange plates in a one-to-one correspondence.

[0016] The advantage of this embodiment is that it achieves insulation isolation for each battery cell. When the surface insulation of any battery cell fails, it will not conduct electricity through the structure of the heat exchange plate, which greatly reduces the risk of short circuits between different battery cells through the heat exchange plate.

[0017] In one embodiment of the first aspect, the sub-heat exchange plate has heat exchange channels, and the insulating portion communicates the heat exchange channels between the sub-heat exchange plates.

[0018] The advantage of this embodiment is that it connects the sub-heat exchange plates by means of a connected heat exchange channel, resulting in a simple and efficient structure.

[0019] In one embodiment of the first aspect, the insulating portion is respectively connected to the sub-heat exchange plates on both sides, and the surface of the insulating portion is flush with the surface of the sub-heat exchange plates on both sides.

[0020] This embodiment provides a possible structural form for the insulation part, which is an insulation structure of a section of the heat exchange plate, resulting in better overall performance and flatness of the heat exchange plate.

[0021] In one embodiment of the first aspect, the insulating part is a connecting pipe made of insulating material.

[0022] The advantage of this embodiment is that the structure of the connecting pipe is simple, easy to process, and the connection position on both sides can be selected as needed, making it more operable.

[0023] In one embodiment of the first aspect, the insulating portion is connected to the top position of the sub-heat exchange plate in the direction of gravity to communicate with the heat exchange channel.

[0024] The advantage of this embodiment is that the insulating part is located at the top in the direction of gravity, which makes the installation of the insulating part more convenient and facilitates the connection between the sub-heat exchange plates on both sides.

[0025] In one embodiment of the first aspect, the insulating portion is connected to a side position of the sub-heat exchange plate to communicate with the heat exchange channel.

[0026] This embodiment, based on requirements and specific structural conditions, provides that the insulating part can also be connected to the side of the sub-heat exchange plate, thereby improving the ease of connection.

[0027] In one embodiment of the first aspect, the battery cell is provided with an insulating film, which simultaneously covers the battery cell and the sub-heat exchange plate that is in corresponding contact with the battery cell.

[0028] The advantage of this embodiment is that it simplifies the installation process of the battery cells and the heat exchange plate while realizing that the battery cells do not conduct electricity through the heat exchange plate, making the operation simple and convenient.

[0029] In one embodiment of the first aspect, the distance between any two adjacent sub-heat exchange plates is less than or equal to the distance between two adjacent battery cells that are in thermal contact with each other.

[0030] There is a gap between adjacent battery cells and a gap between adjacent sub-heat exchange plates. The gap between the latter should be less than or equal to the gap between the former, because it is necessary to make the sub-heat exchange plates completely cover the battery cells as much as possible to ensure the heat dissipation effect of the battery cells.

[0031] In one embodiment of the first aspect, the spacing between any two adjacent sub-heat exchange plates is greater than or equal to 2 mm.

[0032] The effect of this embodiment is that the sub-heat exchange plates maintain a sufficiently large gap to prevent direct contact and conductivity between them. At the same time, it is also to adapt to the battery cells in the battery device. The battery cells in the battery device are spaced apart, so the corresponding sub-heat exchange plates are also spaced apart. The gap between the sub-heat exchange plates is set to be greater than or equal to 2mm according to the gap between the battery cells, so that the sub-heat exchange plates can be correspondingly set with the battery cells they contact.

[0033] In one embodiment of the first aspect, the sub-heat exchange plate has a heat exchange surface that is disposed directly opposite the battery cell, and the area of ​​the heat exchange surface is greater than or equal to the area of ​​the surface of the battery cell facing the sub-heat exchange plate.

[0034] The advantage of this embodiment is that the area of ​​the heat exchange surface is greater than or equal to the area of ​​the surface of the battery cell it contacts, which can improve the heat exchange efficiency.

[0035] Secondly, this application provides an electrical device including the battery device described in any of the embodiments. Because the safety of using the battery device is improved, the reliability of the electrical device is also enhanced.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application; Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application; Figure 3 This is a schematic diagram of the structure of the heat exchange plate in some embodiments of this application; Figure 4 This is a schematic diagram of the structure of the heat exchange plate in some embodiments of this application; Figure 5 This is a schematic diagram of the structure of the heat exchange plate in some embodiments of this application; Figure 6for Figure 3 A schematic diagram of the arrangement between the heat exchange plate and the battery cell; Figure 7 for Figure 4 A schematic diagram of the arrangement between the heat exchange plate and the battery cell; Figure 8 for Figure 5 A schematic diagram of the arrangement between the heat exchange plate and the battery cell; Figure 9 This is a schematic diagram of the structure of a battery cell and a heat exchange plate in a battery device according to some embodiments of this application; Figure 10 This is a schematic diagram of the structure of the heat exchange plate covered with the insulating film of a battery cell in some embodiments of this application.

[0039] The reference numerals in the detailed embodiments are as follows: 1000, vehicles; 100. Battery assembly; 200. Controller; 300. Motor; 10. Heat exchange plate; 11. Sub-heat exchange plate; 12. Insulation part; 13. Battery cell; 14. Insulation film. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0046] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military and police equipment and aerospace. With the continuous expansion of battery application areas, the market demand is also constantly increasing.

[0049] The battery unit is a complete structural unit, including a housing. Multiple individual battery cells are housed inside the housing; in some special scenarios, only one individual battery cell may be housed inside the housing. When there are multiple individual battery cells, they can be arranged in a row to form a battery cell assembly.

[0050] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0051] A battery device may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed series-parallel configurations via a busbar.

[0052] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0053] As an example, a battery cell assembly can be a battery module, which consists of multiple battery cells arranged and fixed together to form an independent module. Alternatively, a battery cell assembly can be formed by bundling multiple battery cells together with cable ties.

[0054] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0055] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0056] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0057] This application provides an electrical device having a battery device 100, that is, an electrical device that uses the battery device 100 as a power source.

[0058] The technical solutions described in this application are applicable to various electrical devices using battery device 100, including vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the above-mentioned electrical devices.

[0059] The battery device 100 disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. Electrical devices can use power systems equipped with the battery device 100 disclosed in this application, which helps improve the reliability of the electrical devices.

[0060] For ease of explanation, the following embodiments will use a vehicle 1000 as an example of the electrical device provided in this application.

[0061] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0062] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0063] like Figure 2 This is the battery device 100 provided in the embodiments of this application. The battery cells 13 of the battery device 100 are capable of charging and discharging reactions.

[0064] The temperature of the battery cell 13 will rise during the charging and discharging process. To ensure its normal operating temperature, a heat exchange device is required.

[0065] In related technologies, heat exchange is performed on battery cells using heat exchange plates made of metal. The battery cell casing is charged, and the heat exchange plates and battery cells exchange heat in contact, with insulation between them. However, if the insulation between the heat exchange plates and battery cells fails, the battery cells with a high potential difference are more likely to conduct electricity through the heat exchange plates, thus causing a short circuit.

[0066] Based on the above issues, please refer to Figures 2-9 This application provides a specific embodiment of a battery device 100, which includes a battery cell 13 and a heat exchange plate 10.

[0067] The heat exchange plate 10 is used to circulate the heat exchange medium. The heat exchange plate 10 includes an insulating part 12, which divides the heat exchange plate 10 into multiple mutually insulated parts that are interconnected through the insulating part 12. The heat exchange plate 10 is in thermal contact with multiple battery cells 13. The insulating part 12 is provided at least between the areas of the heat exchange plate 10 that are in contact with the two battery cells 13 with the largest potential difference among the multiple battery cells 13.

[0068] Specifically, the battery cell 13 contacts the heat exchange plate 10 to achieve heat conduction. The heat exchange plate 10 provided in this embodiment includes an insulating portion 12, which separates the heat exchange plate 10, creating structural relative insulation between the separated portions. When different battery cells 13 contact these two mutually insulated portions, even if the insulation between the battery cell 13 and the heat exchange plate 10 fails, there will be no electrical conductivity through the heat exchange plate 10, preventing a short circuit between the battery cell 13 and another battery cell 13. Furthermore, to avoid affecting the flow of the heat exchange medium, the insulating portion 12 in this embodiment also has connectivity. Although it insulates the two portions of the heat exchange plate 10, the two portions are connected through the insulating portion 12, allowing the heat exchange medium to flow freely without affecting its flow.

[0069] In this embodiment, the heat exchange plate 10 can contact multiple battery cells 13. The insulating part 12 is provided at least between the areas of the same heat exchange plate 10 that the two battery cells 13 with the largest potential difference contact with. In this way, the two battery cells 13 with the largest potential difference will not conduct electricity through the heat exchange plate 10 they are in contact with, which can reduce the risk of short circuit.

[0070] The insulation part 12 can be made of polypropylene or polyvinyl chloride. Both have good insulation properties, sufficient structural strength, and good corrosion resistance.

[0071] The advantage of this embodiment is that by insulating the heat exchange plate 10 through the insulating part 12, the risk of electrical conduction between different battery cells 13 through the heat exchange plate 10 can be reduced. At the same time, the insulating part 12 also connects the separated parts, so that the flow of the heat exchange medium is not interrupted, which is conducive to the flow of the heat exchange medium.

[0072] It should be noted that this application applies to situations where a heat exchange medium with low conductivity is used, such as a heat exchange medium with a conductivity below 100 μS / cm. It is not applicable to heat exchange media with a conductivity higher than this. The conductivity of the heat exchange medium flowing through each heat exchange plate 10 is low, much lower than the conductivity of the material of the heat exchange plate 10 itself, and the conductivity factor of the heat exchange medium can be ignored.

[0073] In some embodiments, the insulating portion 12 is provided at least between the regions of the heat exchange plate 10 that are respectively contacted by two battery cells 13 with a potential difference greater than 80V among the plurality of battery cells 13.

[0074] Specifically, within the battery device 100, multiple battery cells 13 are electrically connected to each other for proper power output or charging. Therefore, potential differences may exist between battery cells 13 connected at different locations. Some battery cells 13 have larger potential differences, thus increasing the likelihood of short circuits and potentially causing more serious consequences. Therefore, insulation is required between battery cells 13 with large potential differences; that is, insulation portions 12 need to be provided between the areas of the heat exchange plate 10 they contact to reduce the risk of short circuits. This embodiment provides an insulation portion 12 between the areas of the same heat exchange plate 10 contacted by two battery cells 13 with a potential difference greater than 80V, for mutual insulation and isolation.

[0075] This embodiment provides a potential difference threshold, that is, battery cells 13 with a potential difference of at least 80V need to contact the separated portions of the heat exchange plates 10 on both sides of the insulation part 12 respectively, in order to reduce the risk of short circuit.

[0076] In some embodiments, please refer to Figures 3-9 The insulating part 12 is provided between the areas of the heat exchange plate 10 that are in contact with any two of the multiple battery cells 13.

[0077] Specifically, in this embodiment, an insulating part 12 is provided between the areas of the same heat exchange plate 10 that any two battery cells 13 are in contact with, thereby forming relative insulation between each battery cell 13, which can greatly reduce the risk of electrical conduction between battery cells 13 through the heat exchange plate 10.

[0078] In some embodiments, please refer to Figure 6 , Figure 7 and Figure 9The heat exchange plate 10 is arranged along a first direction, and the battery device 100 includes at least a plurality of battery cells 13 arranged sequentially at intervals along the first direction and in thermal contact with the heat exchange plate 10. The first direction may be... Figure 9 The X direction in the equation.

[0079] This embodiment provides the arrangement of battery cells 13 and heat exchange plates 10 inside the battery device 100. The first direction can be any direction, specifically a horizontal direction parallel to the inner wall of the battery device 100. The heat exchange plate 10 is long and straight, extending along the first direction. In order to facilitate heat dissipation, the battery device 100 has at least a plurality of battery cells 13 arranged along the first direction, so that the plurality of battery cells 13 can correspond well with the heat exchange plate 10, thereby improving the heat exchange effect.

[0080] The battery device 100 may include multiple heat exchange plates 10, which are parallel to each other and arranged along a first direction. Each heat exchange plate 10 may also be provided with a row of multiple battery cells 13 arranged in the same direction. That is, one heat exchange plate 10 corresponds to multiple battery cells 13. Battery cells 13 in different rows will not conduct electricity through the same heat exchange plate 10, and battery cells 13 in the same row will not conduct electricity through the heat exchange plate 10 because the heat exchange plate 10 is provided with an insulating part 12.

[0081] Therefore, among the multiple battery cells 13 in contact with the same heat exchange plate 10, insulation parts 12 can be provided between the areas of the heat exchange plate 10 corresponding to certain battery cells 13. Specifically, the battery cells 13 with the largest potential difference can be selected. Alternatively, battery cells 13 with a potential difference greater than 80V can be selected, or any two battery cells 13 can be selected.

[0082] This embodiment provides a corresponding arrangement of the heat exchange plate 10 and multiple battery cells 13, which is beneficial for heat dissipation and for the corresponding selection of the position of the insulation part 12. The setting position can be selected based on the potential relationship of the battery cells 13 arranged in the same direction.

[0083] In some embodiments, please refer to Figure 6 , Figure 7 and Figure 9 The number of multiple battery cells 13 arranged along the first direction is M, and they are connected in series in the conductive line according to the arrangement order in the first direction. The insulating part 12 is provided at least between the areas of the heat exchange plate 10 that are respectively contacted by the Nth battery cell 13 and the N+1th battery cell 13 arranged along the first direction. If M is even, then N is M / 2. If M is odd, then N is (M-1) / 2 or (M+1) / 2.

[0084] Specifically, this embodiment provides a selective placement of the insulation portion 12 in a structure consisting of a plurality of battery cells 13 arranged along a first direction and a heat exchange plate 10 extending along the first direction.

[0085] The number of battery cells 13 arranged along the first direction can be M, where M can be odd or even. However, M must be greater than 1. The battery cells 13 being connected in series in the conductive circuit according to their arrangement order along the first direction means that the order in which the battery cells 13 are arranged in the series circuit along the first direction is such that the potential of the battery cells 13 arranged sequentially along the first direction decreases or increases sequentially. In this case, an insulating part 12 can be provided between the heat exchange plate 10 regions contacted by two battery cells 13 located in the middle position, thereby isolating the battery cells 13 with large potential differences on both sides. Specifically, it is provided between the regions of the heat exchange plate 10 contacted by the Nth battery cell 13 and the (N+1)th battery cell 13 arranged along the first direction. If M is even, N is M / 2; if M is odd, N is (M-1) / 2 or (M+1) / 2.

[0086] The advantage of this embodiment is that insulation isolation is achieved on the heat exchange plate 10 at least between two groups of battery cells 13 with large potential differences, which can reduce the risk of short circuit.

[0087] In some embodiments, please refer to Figures 3-9 The insulating part 12 divides the heat exchange plate 10 into multiple sub-heat exchange plates 11 that are insulated from each other and interconnected through the insulating part 12. Multiple battery cells 13 are in thermal contact with the multiple sub-heat exchange plates 11 in a one-to-one correspondence.

[0088] Specifically, the heat exchange plate 10 is divided into multiple sub-heat exchange plates 11 by the insulating part 12, which means that the sub-heat exchange plates 11 are insulated from each other, but can be electrically connected through the insulating part 12 without affecting the flow of the heat exchange medium. The multiple battery cells 13 are in one-to-one thermal contact with the multiple sub-heat exchange plates 11, which means that each battery cell 13 contacts an independent sub-heat exchange plate 11.

[0089] The advantage of this embodiment is that it achieves insulation isolation for each battery cell 13. When the surface insulation of any battery cell 13 fails, it will not conduct electricity through the structure of the heat exchange plate 10, which greatly reduces the risk of short circuit between different battery cells 13 through the heat exchange plate 10.

[0090] In some embodiments, the sub-heat exchange plate 11 has a heat exchange channel, and the insulation portion 12 connects the heat exchange channels between the sub-heat exchange plates 11.

[0091] This embodiment provides a specific form in which the insulating part 12 connects the sub-heat exchange plates 11, that is, it connects the heat exchange channels between the sub-heat exchange plates 11. The heat exchange medium can flow from the heat exchange channel of one sub-heat exchange plate 11 to the heat exchange channel of another sub-heat exchange plate 11, or it can flow from the heat exchange channel of another sub-heat exchange plate 11 back to the heat exchange channel of the previous sub-heat exchange plate 11, thus realizing the circulation of the heat exchange medium.

[0092] The heat exchange channel of the heat exchange plate 11 can be provided with an inlet and an outlet, and the insulation part 12 can connect the inlet and the outlet.

[0093] The advantage of this embodiment is that the sub-heat exchange plates 11 are connected by connecting heat exchange channels, resulting in a simple and efficient structure.

[0094] In some embodiments, please refer to Figure 4 and Figure 7 The insulating part 12 is connected to the sub-heat exchange plates 11 on both sides respectively, and the surface of the insulating part 12 is flush with the surface of the sub-heat exchange plates 11 on both sides.

[0095] Specifically, the insulation part 12 can be a structure that is adapted to the shape of the heat exchange plate 11. For example, a section of the heat exchange plate 10 in the length direction can be made of insulating material. This achieves insulation of the structural parts on both sides of the insulation part 12, and the internal heat exchange channel structure is not changed, thus achieving connection.

[0096] This embodiment provides a possible structural form for the insulation part 12, which is an insulation structure of a section of the heat exchange plate 10, resulting in better overall performance and structural flatness of the heat exchange plate 10.

[0097] In some embodiments, please refer to Figure 3 , Figure 5 as well as Figure 6 , Figure 8 and Figure 9 The insulating part 12 can also be a connecting pipe made of insulating material.

[0098] Specifically, the insulating part 12 is a connecting pipe that connects to the heat exchange channels on both sides.

[0099] The advantage of this embodiment is that the structure of the connecting pipe is simple, easy to process, and the connection position on both sides can be selected as needed, making it more operable.

[0100] In some embodiments, please refer to Figure 5 and Figure 8 The insulating part 12 is connected to the top position of the sub-heat exchange plate 11 in the direction of gravity to connect the heat exchange channel.

[0101] Specifically, the insulating part 12 is a connecting pipe, and the position of the connecting pipe is set to facilitate connection with the heat exchange plate 11, and the structural layout should be easy to operate.

[0102] Therefore, this embodiment provides that the insulating part 12 is connected to the top position of the sub-heat exchange plate 11 in the direction of gravity, that is, the inlet and outlet of the heat exchange channel of the sub-heat exchange plate 11 can be located at the top of the sub-heat exchange plate 11. Since the battery cell 13 and the heat exchange plate 10 are both arranged in the battery device 100, there is sufficient operating space above them to facilitate the installation of the insulating part 12. Moreover, the insulating part 12 can cross over the battery cell 13 if needed.

[0103] The advantage of this embodiment is that the insulating part 12 is located at the top in the direction of gravity, which makes it easier to install the insulating part 12 and facilitates the connection between the sub-heat exchange plates 11 on both sides.

[0104] In some embodiments, please refer to Figure 3 , Figure 6 and Figure 9 The insulating part 12 is connected to the side of the sub-heat exchange plate 11 to connect the heat exchange channel.

[0105] Specifically, since the sub-heat exchange plate 11 is in corresponding contact with the battery cell 13, when the spacing between the battery cells 13 is large, the spacing of the sub-heat exchange plate 11 is also large. Or, when there is limited space for operation at the top, the insulating part 12 can be connected to the side of the sub-heat exchange plate 11. That is, the outlet and the inlet are provided on the side of the sub-heat exchange plate 11.

[0106] According to the requirements and specific structural conditions, this embodiment provides that the insulating part 12 can also be connected to the side of the sub-heat exchange plate 11, thereby improving the ease of connection.

[0107] In some embodiments, please refer to Figure 10 The battery cell 13 is provided with an insulating film 14, which covers both the battery cell 13 and the corresponding heat exchange plate 11 that is in contact with the battery cell 13.

[0108] Specifically, the insulating film 14 can cover the battery cell 13. When a sub-heat exchange plate 11 is provided, that is, when the sub-heat exchange plate 11 is in contact with the battery cell 13, the insulating film 14 can simultaneously wrap the battery cell 13 and the sub-heat exchange plate 11 corresponding to the battery cell 13, so as to form an integral structure. The sub-heat exchange plate 11 is installed at the same time as the battery cell 13, so it is not necessary to position and install the sub-heat exchange plate 11 after the battery cell 13 is installed and positioned. This achieves simultaneous installation of both, and after installation, the insulating part 12 can be connected to the two adjacent sub-heat exchange plates 11.

[0109] The advantage of this embodiment is that it simplifies the installation process of the battery cell 13 and the heat exchange plate 10 while realizing that the battery cell 13 does not conduct electricity through the heat exchange plate 10, making the operation simple and convenient.

[0110] In some embodiments, the distance between any two adjacent sub-heat exchange plates 11 is less than or equal to the distance between two adjacent battery cells 13 that are in thermal contact with each other.

[0111] Specifically, there is a gap between adjacent battery cells 13 and a gap between adjacent sub-heat exchange plates 11. The gap between the latter is smaller than or equal to the gap between the former, because it is necessary to make the sub-heat exchange plates 11 completely cover the battery cells 13 as much as possible to ensure the heat dissipation effect of the battery cells 13.

[0112] In some embodiments, the spacing between any two adjacent sub-heat exchange plates 11 is greater than or equal to 2 mm.

[0113] Specifically, the sub-heat exchange plates 11 are spaced apart. In this embodiment, the distance between any two sub-heat exchange plates 11 is greater than or equal to 2 mm. For example, multiple plate-shaped sub-heat exchange plates 11 are arranged sequentially along the same direction, and the distance between adjacent sub-heat exchange plates 11 is greater than or equal to 2 mm.

[0114] The effect of this embodiment is that the sub-heat exchange plates 11 maintain a sufficiently large gap to prevent direct contact and conductivity between them. At the same time, it is also to adapt to the battery cells 13 in the battery device 100. The battery cells 13 in the battery device 100 are spaced apart, so the corresponding sub-heat exchange plates 11 are also spaced apart. The gap between the sub-heat exchange plates 11 is set to be greater than or equal to 2mm according to the gap between the battery cells 13, so that the sub-heat exchange plates 11 and the battery cells 13 they contact can be correspondingly set.

[0115] In some embodiments, the sub-heat exchange plate 11 has a heat exchange surface that is directly opposite the battery cell 13, and the area of ​​the heat exchange surface is greater than or equal to the area of ​​the surface of the battery cell 13 facing the sub-heat exchange plate 11.

[0116] The surface of the heat exchange plate 11 that is in thermal contact with the battery cell 13 is called the heat exchange surface, and the area of ​​the heat exchange surface is greater than or equal to the area of ​​the surface of the battery cell 13 that is in contact with the heat exchange surface.

[0117] The advantage of this embodiment is that the area of ​​the heat exchange surface is greater than or equal to the area of ​​the surface of the battery cell 13 it contacts, which can improve the heat exchange efficiency.

[0118] This application also provides an electrical device, including the battery device 100 provided in any embodiment. Because the safety of using the battery device 100 is improved, the reliability of the electrical device is also enhanced.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a plurality of battery cells; and a heat exchange plate for circulating a heat exchange medium, the heat exchange plate comprising an insulation portion that separates the heat exchange plate into a plurality of portions that are insulated from each other and are in communication with each other through the insulation portion, the heat exchange plate being in thermal contact with the plurality of battery cells, the insulation portion being provided at least between regions of the heat exchange plate that are respectively contacted by two battery cells having the largest potential difference among the plurality of battery cells. The insulation portion is provided at least between regions of the heat exchange plate that are respectively contacted by two battery cells having a potential difference greater than 80 V among the plurality of battery cells.

2. The battery device of claim 1, wherein The insulation portion is provided between regions of the heat exchange plate that are respectively contacted by any two battery cells among the plurality of battery cells.

3. The battery device of claim 1, wherein The heat exchange plate is arranged along a first direction, and the battery device comprises a plurality of battery cells arranged in sequence along the first direction and in thermal contact with the heat exchange plate.

4. The battery device of claim 1, wherein 5. The battery device according to claim 4, wherein: the plurality of battery cells arranged along the first direction are connected in series in an electrically conductive circuit in the order of arrangement along the first direction; and the insulation portion is provided at least between regions of the heat exchange plate that are respectively contacted by an Nth battery cell and an N+1th battery cell arranged along the first direction, N being M / 2 if M is even or (M-1) / 2 or (M+1) / 2 if M is odd. The insulation portion separates the heat exchange plate into a plurality of sub-heat exchange plates that are insulated from each other and are in communication with each other through the insulation portion, and the plurality of battery cells are in thermal contact with the plurality of sub-heat exchange plates in a one-to-one correspondence.

6. The battery device of any one of claims 1-5, wherein, The sub-heat exchange plates have heat exchange flow channels, and the insulation portion communicates the heat exchange flow channels between the sub-heat exchange plates.

7. The battery device of claim 6, wherein The insulation portion is in abutment with the sub-heat exchange plates on both sides, and the surface of the insulation portion is flush with the surfaces of the sub-heat exchange plates on both sides.

8. The battery device of claim 6, wherein The insulation portion is a communication pipe of an insulating material.

9. The battery device of claim 7, wherein The insulation portion is connected to the top of the sub-heat exchange plates in the direction of gravity to communicate the heat exchange flow channels.

10. The battery device of claim 9, wherein, The insulation portion is connected to the side of the sub-heat exchange plates to communicate the heat exchange flow channels.

11. The battery device of claim 9, wherein The battery cells are provided with an insulating film that simultaneously covers the battery cells and the sub-heat exchange plates that are respectively contacted by the battery cells.

12. The battery device of claim 6, wherein, The distance between any two adjacent sub-heat exchange plates is less than or equal to the distance between two adjacent battery cells that are respectively in thermal contact with the two sub-heat exchange plates.

13. The battery device of claim 6, wherein The distance between any two adjacent sub-heat exchange plates is greater than or equal to 2 mm.

14. The battery device of claim 6, wherein, The sub-heat exchange plates have heat exchange surfaces that are arranged opposite the battery cells, and the area of the heat exchange surfaces is greater than or equal to the area of the surface of the battery cells that faces the sub-heat exchange plates.

15. The battery device of claim 6, wherein, The battery device according to any one of claims 1-15.

16. An electrical device, comprising: ​

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