Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, and the battery device comprises a battery monomer, the outer surface of which is provided with an electrode terminal; and the connecting piece is provided with a conductive region and an insulating region, the conductive region is electrically connected with the electrode terminal, and the insulating region is attached to at least part of the outer surface of the battery monomer and is used for cooling the electrode terminal. The connecting piece is electrically connected with the electrode terminal through the conductive region, and can be attached to the surface of the battery monomer through the insulating region, so that the heat dissipation area of the electrode terminal can be increased, a good cooling effect on the electrode terminal is achieved, and the quick charging performance of the battery monomer is improved.

Description

Technical Field

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

[0002] With the development of battery technology, the requirements for various battery performance aspects are becoming increasingly stringent, such as the requirement for fast charging capabilities. However, during fast charging, the temperature of the electrode terminals rises rapidly, and the higher temperature affects fast charging efficiency, thus limiting the fast charging capability of individual battery cells. Utility Model Content

[0003] Therefore, it is necessary to provide a battery device and electrical equipment to address the current limitation of fast charging capability of individual battery cells.

[0004] In a first aspect, this application provides a battery device, including a battery cell and a connector. The outer surface of the battery cell is provided with electrode terminals. The connector has a conductive area and an insulating area. The conductive area is electrically connected to the electrode terminals, and the insulating area is attached to at least a portion of the outer surface of the battery cell for cooling the electrode terminals.

[0005] With the above structure, the connector can fit into the surface of the battery cell through the insulating area, which can increase the heat dissipation area of ​​the electrode terminals, thereby achieving a good cooling effect on the electrode terminals and improving the fast charging efficiency of the battery cell.

[0006] In some embodiments, the connector includes a conductor and an insulating layer. The insulating layer is coated on a portion of the surface of the conductor to form an insulating region, and the area of ​​the conductor not coated with the insulating layer forms a conductive region.

[0007] By setting a conductor and an insulating layer, electrical connection with the electrode terminals can be successfully achieved, and the heat dissipation area of ​​the electrode terminals can be increased, which can play a good role in cooling the electrode terminals and improve the fast charging efficiency of the battery cells.

[0008] In some embodiments, the electrode terminals include a plurality of electrodes, the connectors include a plurality of connectors, and each connector has a connecting end and a free end disposed opposite to each other, and each connecting end forms a conductive area electrically connected to one of the electrode terminals.

[0009] Therefore, each connector can be electrically connected to each electrode terminal in a corresponding manner, thereby cooling down each electrode terminal and further improving the fast charging efficiency of the battery cell.

[0010] In some embodiments, the electrode terminal includes at least two positive terminals, and at least two of the positive terminals are electrically connected to each other; and / or, the electrode terminal includes at least two negative terminals, and at least two of the negative terminals are electrically connected to each other.

[0011] With the above structure, the connector can achieve conduction between the two positive terminals or the two negative terminals. On the one hand, it can increase the current conduction path of the battery cell, reduce the impedance of the battery cell, and improve the overcurrent capacity of the battery cell. On the other hand, it can also reduce the temperature of the electrode terminals.

[0012] In some embodiments, the connector includes a bent portion and a main body portion that are perpendicular to each other. The bent portion is connected to at least one end of the main body portion, and a conductive region is formed on the bent portion. The area on the main body portion and / or the bent portion where an insulating region is formed is fitted to the outer surface of the battery cell.

[0013] With the above structure, the bent portion is electrically connected to the electrode terminal through the conductive area. At the same time, the area on the main body and / or the bent portion where the insulating area is formed can be closely attached to the surface of the battery cell, thereby effectively improving the cooling effect on the electrode terminal.

[0014] In some embodiments, the width of the connector is no greater than the thickness of the battery cell in the thickness direction. This further reduces the space occupied by the connector and battery cell within the housing, thereby increasing the overall energy density of the battery device.

[0015] In some embodiments, the connector is configured as a sheet-like structure. This allows the connector to not only fit better against the surface of the battery cell, but also further reduces its footprint within the housing, thereby increasing the energy density of the battery device.

[0016] In some embodiments, the battery device further includes a heat exchanger, the interior of which has a flow channel for the flow of a heat exchange medium, and the heat exchanger has a heat exchange surface that contacts the battery cell and / or connector.

[0017] By incorporating heat exchange components, heat exchange can be achieved during the cycle of individual battery cells, allowing for better control of the temperature of individual battery cells during use and improving the performance of the battery device.

[0018] In some embodiments, a receiving groove is formed on the heat exchange surface, the shape of which matches the shape of the connector so that the connector can be snapped into the receiving groove.

[0019] The aforementioned structure, by engaging the connector within the receiving groove, increases the contact area between the connector and the heat exchanger, thereby increasing the heat exchange area and improving heat exchange efficiency. Furthermore, housing the connector within the groove reduces the space it occupies within the housing, increasing the energy density of the battery pack. Additionally, the receiving groove provides some restraint to the connector, ensuring greater stability between the connector and the individual battery cells.

[0020] In some embodiments, the depth of the receiving groove is not less than the thickness of the connector. This allows the connector to be better accommodated within the receiving groove, further reducing the space occupied by the connector within the housing and improving the energy density of the battery device.

[0021] Secondly, this application also provides an electrical device, including the battery device described above.

[0022] The aforementioned battery device and electrical equipment have connectors that are electrically connected to the electrode terminals through conductive areas and can adhere to the surface of the battery cells through insulating areas. This increases the heat dissipation area of ​​the electrode terminals, thereby achieving a good cooling effect on the electrode terminals and improving the fast charging efficiency of the battery cells. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a battery device according to one or more embodiments.

[0024] Figure 2 This is a schematic diagram of the structure of a single battery cell in a battery device according to one or more embodiments.

[0025] Figure 3 This is a schematic diagram of the structure of a connector in a battery device according to one or more embodiments.

[0026] Figure 4 for Figure 1 A magnified view of a portion of point A in the middle.

[0027] Figure 5 This is a schematic diagram of the structure of a heat exchanger in a battery device according to one or more embodiments.

[0028] Figure 6 This is a schematic diagram of the structure of a heat exchanger in a battery device according to one or more embodiments.

[0029] Explanation of reference numerals in the attached drawings: 100, battery device; 10, battery cell; 20, connector; 30, heat exchanger; 11, electrode terminal; 12, positive terminal; 13, negative terminal; 21, bending part; 22, main body; 31, flow channel; 32, heat exchange surface; 33, receiving groove; a, thickness direction. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0037] A battery cell is the smallest unit that makes up a battery. A battery cell typically includes a casing, a top cover, and electrode assemblies. The top cover is a sealing cap located at the opening of the casing. The top cover and the casing together enclose a cavity in which the electrode assemblies are placed.

[0038] A battery typically consists of a casing and individual battery cells. The casing is hollow, providing space to house the battery cells. Additionally, a battery may include other functional components such as current collectors and thermal management devices, collectively forming a battery assembly.

[0039] The size of a battery cell affects its energy density; the larger the cell, the higher the energy density, and vice versa. Therefore, as batteries are used more widely, the requirements for energy density are increasing, leading to larger battery cell sizes.

[0040] In addition, batteries are required to have fast charging capabilities to meet the demands of more frequent use. However, as the size of individual battery cells increases, the conductive path becomes longer. This limits the battery's fast charging capability and is detrimental to improving the overall performance of the battery.

[0041] Based on the above considerations, in order to address the problem that the increased size of battery cells and the resulting longer conductive paths limit the fast-charging capability of batteries, one or more embodiments of this application provide a battery device in which a connector is electrically connected to the electrode terminals via a conductive area. This connector increases the current conduction path of the battery cell, reduces its impedance, and improves its overcurrent capacity. Furthermore, the connector is also attached to the surface of the battery cell via an insulating area, increasing the heat dissipation area of ​​the electrode terminals and thus providing a good cooling effect, further enhancing the fast-charging performance of the battery device.

[0042] It should be noted that the battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0043] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0044] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0045] 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.

[0046] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0047] Please refer to the following: Figure 1 and Figure 2 One embodiment of this application provides a battery device 100, including a battery cell 10 and a connector 20. The outer surface of the battery cell 10 is provided with an electrode terminal 11. The connector 20 has a conductive area (not shown in the figure) and an insulating area (not shown in the figure). The conductive area is electrically connected to the electrode terminal 11, and the insulating area is attached to at least a portion of the outer surface of the battery cell 10 for cooling the electrode terminal 11.

[0048] It should be noted that the battery cell 10 typically includes a casing and an electrode assembly disposed inside the casing. The electrode assembly is the component in the battery cell 10 where the electrochemical reaction takes place. The electrode assembly further includes a positive electrode sheet, a separator, and a negative electrode sheet that are stacked or wound together. Positive electrode tabs and negative electrode tabs are formed on the positive electrode sheet and the negative electrode sheet, respectively.

[0049] The electrode terminal 11 is located on the outer surface of the battery cell 10, that is, the electrode terminal 11 is located on the outer surface of the casing. Herein, the electrode terminal 11 refers to the component that is electrically connected to the positive and / or negative tabs to realize the input or output of electrical energy of the battery cell 10.

[0050] The connector 20 refers to a component that can be electrically connected to the electrode terminal 11 and is attached to at least a portion of the outer surface of the battery cell 10, thereby increasing the heat dissipation area. Specifically, the connector 20 has conductive areas and insulating areas formed thereon, the conductive areas being conductive and capable of being electrically connected to the electrode terminal 11.

[0051] The insulating area has insulation properties. By attaching the insulating area to the outer surface of the battery cell 10, the probability of short circuit in the battery cell 10 can be reduced. At the same time, the insulating area can increase the heat dissipation area of ​​the electrode terminal 11, thereby better cooling the electrode terminal 11. In this way, the battery cell 10 can achieve fast charging better.

[0052] With the above structure, the connector 20 can be attached to the surface of the battery cell 10 through the insulating area, which can increase the heat dissipation area of ​​the electrode terminal 11, thereby achieving a good cooling effect on the electrode terminal 11 and improving the fast charging performance of the battery cell 10.

[0053] In some embodiments, the connector 20 includes a conductor (not shown) and an insulating layer (not shown). The insulating layer is coated on a portion of the surface of the conductor to form an insulating region, and the area of ​​the conductor not coated with the insulating layer forms a conductive region.

[0054] Specifically, the conductor serves as the main body of the connector 20, giving it excellent conductivity. Simultaneously, an insulating layer is coated on a portion of the outer surface of the conductor, allowing the connector 20 to contact areas of the battery cell 10 other than the electrode terminals 11 via the insulating layer. This reduces the probability of a short circuit between the connector 20 and the battery cell 10.

[0055] Furthermore, the area on the connector 20 coated with an insulating layer is an insulating area, and the area without an insulating layer, i.e., the area exposing the conductor, is a conductive area. The conductive area can be located at at least one end of the connector 20 to facilitate electrical connection between the conductive area and the electrode terminal 11. At the same time, the insulating area is fitted to the outer surface of the housing.

[0056] By setting a conductor and an insulating layer, electrical connection with electrode terminal 11 can be successfully achieved. It can also increase the heat dissipation area of ​​electrode terminal 11, play a good cooling role for electrode terminal 11, and improve the fast charging efficiency of battery cell 10.

[0057] In some embodiments, the electrode terminals 11 include a plurality of terminals, the connectors 20 include a plurality of connectors 20, and each connector 20 has a connecting end and a free end disposed opposite to each other, and each connecting end forms a conductive area electrically connected to one of the electrode terminals.

[0058] Specifically, a plurality of electrode terminals 11 can be provided on the battery cell 10, and correspondingly, a plurality of connectors 20 can also be provided, and each connector 20 forms a conductive area, and the conductive area of ​​each connector 20 is electrically connected to one of the electrode terminals 11. That is to say, each connector 20 can be connected one-to-one with some or all of the electrode terminals 11.

[0059] As a specific embodiment, two electrode terminals 11 are respectively provided at opposite ends of the battery cell 10. One connector 20 is electrically connected to one of the electrode terminals 11 through its own conductive area, or the two connectors 20 are electrically connected to the two electrode terminals 11 through their own conductive areas respectively.

[0060] Furthermore, when the two connectors 20 are electrically connected to the two electrode terminals 11 through their respective conductive areas, the ends of the two connectors 20 that are away from their respective conductive areas are spaced apart, that is, the two connectors 20 are disconnected from each other. At this time, each connector 20 is electrically connected to the corresponding electrode terminal 11, and each electrode terminal 11 is independent of each other.

[0061] Therefore, each connector 20 can be electrically connected to each electrode terminal 11 in a corresponding manner, thereby cooling down each electrode terminal 11 and further improving the fast charging efficiency of the battery cell 10.

[0062] In some embodiments, electrode terminal 11 includes at least two positive terminals 12, and at least two of the positive terminals 12 are electrically connected to each other by a connector 20. And / or, electrode terminal 11 includes at least two negative terminals 13, and at least two of the negative terminals 13 are electrically connected to each other by a connector 20.

[0063] Specifically, the electrode terminal 11 includes at least two positive terminals 12. Taking two positive terminals 12 as an example, the two positive terminals 12 are respectively disposed at opposite ends of the battery cell 10. Conductive areas are formed at opposite ends of the connector 20, with one conductive area electrically connected to one of the positive terminals 12 and the other conductive area electrically connected to the other positive terminal 12. Meanwhile, the insulating area of ​​the connector 20 is fitted into the housing.

[0064] Thus, the connector 20 forms a connection between the two positive terminals 12, which can increase the current conduction path of the battery cell 10, reduce the impedance of the battery cell 10, effectively improve the overcurrent capacity between the positive terminals 12, and also reduce the temperature of the positive terminals 12.

[0065] Similarly, the electrode terminal 11 may also include at least two negative terminals 13. Taking two negative terminals 13 as an example, the two negative terminals 13 are respectively disposed at opposite ends of the battery cell 10. Conductive areas are formed at opposite ends of the connector 20, with one conductive area electrically connected to one of the negative terminals 13 and the other conductive area electrically connected to the other negative terminal 13. At the same time, the insulating area of ​​the connector 20 is fitted into the housing.

[0066] Thus, the connector 20 forms a connection between the two negative terminals 13, which can also increase the current conduction path of the battery cell 10, reduce the impedance of the battery cell 10, effectively improve the overcurrent capacity between the negative terminals 13, and reduce the temperature of the negative terminals 13.

[0067] Through the above structure, the connector 20 can realize the conduction between the two positive terminals 12 or the two negative terminals 13, which can not only effectively improve the overcurrent capacity of the battery cell 10, but also reduce the temperature of the electrode terminal 11.

[0068] like Figure 3 As shown, in some embodiments, the connector 20 includes a bent portion 21 and a main body portion 22 that are perpendicular to each other. The bent portion 21 is connected to at least one end of the main body portion 22, and a conductive area is formed on the bent portion 21. The area on the main body portion 22 and / or the bent portion 21 where an insulating area is formed is fitted to the outer surface of the battery cell 10.

[0069] It should be noted that the battery cell 10 is typically configured as a rectangular structure, with the positive terminal 12 and the negative terminal 13 protruding from the top and / or bottom surfaces of the battery cell 10. Consequently, the bent portion 21 is perpendicular to the main body 22, and the bent portion 21 is connected to at least one end of the main body 22. When the bent portion 21 is connected to the positive terminal 12 and the negative terminal 13 on the top and / or bottom surfaces, the main body 22 and / or the bent portion 21 can better conform to the surface of the battery cell 10, thereby improving heat dissipation.

[0070] With the above structure, the bent part 21 is electrically connected to the electrode terminal 11 through the conductive area. At the same time, the main body 22 can fit tightly against the side of the battery cell 10, thereby effectively improving the cooling effect on the electrode terminal 11.

[0071] like Figure 4 As shown, in some embodiments, the width W of the connector 20 is not greater than the thickness H of the battery cell 10 in the thickness direction a.

[0072] It should be noted that the battery device 100 typically also includes a housing, in which multiple battery cells 10 are arranged. In this case, the multiple battery cells 10 are arranged sequentially along their own thickness direction 'a'. Here, the thickness direction 'a' of the battery cell 10 is perpendicular to the large surface of the battery cell 10.

[0073] When multiple battery cells 10 are arranged in the housing, the large surfaces of two adjacent battery cells 10 are in contact with each other. Thus, by placing the connector 20 on the side of the battery cell 10, that is, by placing the connector 20 in contact with the side of the battery cell 10, the space occupied by each battery cell 10 in the housing can be further reduced, thereby increasing the energy density.

[0074] Based on this, the width of the connector 20 is set to be no greater than the thickness of the battery cell 10, that is, the width of the connector 20 is less than or equal to the thickness of the battery cell 10, which can further reduce the space occupied by the connector 20 and the battery cell 10 in the housing and improve the overall energy density of the battery device 100.

[0075] Understandably, in some other embodiments, the connector 20 may also be attached to other surfaces of the battery cell 10, such as the large surface, to achieve the same cooling effect on the electrode terminal 11, which will not be elaborated here.

[0076] In some embodiments, the connector 20 is configured as a sheet-like structure. Therefore, the connector 20 can not only better fit against the surface of the battery cell 10, but also further reduce its space occupation in the housing, thereby increasing the energy density of the battery device 100.

[0077] Of course, in some other embodiments, the connector 20 can also be configured with other shapes. For example, the connector 20 can be configured as a semi-circular structure, that is, one side of the connector 20 is attached to the surface of the battery cell 10, while the other side is curved.

[0078] like Figure 5 and Figure 6 As shown, in some embodiments, the battery device 100 further includes a heat exchanger 30, the interior of which is provided with a flow channel 31 for the flow of a heat exchange medium, and the heat exchanger 30 has a heat exchange surface 32 that contacts the battery cell 10 and / or the connector 20.

[0079] Specifically, the heat exchanger 30 refers to a component installed in the housing that can exchange heat with the battery cell 10. The heat exchanger 30 may be, but is not limited to, a water-cooled plate, with a flow channel 31 extending through its interior for coolant to circulate.

[0080] Meanwhile, the water-cooled plate has a heat exchange surface 32, which is in contact with the battery cell 10 and / or the connector 20. When the coolant flows in the flow channel 31, it can cool the battery cell 10.

[0081] By setting up the heat exchanger 30, heat exchange can be achieved during the cycle of the battery cell 10, the temperature of the battery cell 10 during use can be better controlled, and the performance of the battery device 100 can be improved.

[0082] In some embodiments, a receiving groove 33 is formed on the heat exchange surface 32, and the shape of the receiving groove 33 matches the shape of the connector 20 so that the connector 20 can be snapped into the receiving groove 33.

[0083] The shape of the receiving groove 33 matches the shape of the connector 20. Specifically, when the connector 20 is set as a sheet structure, the shape of the receiving groove 33 is a rectangular groove structure so that the connector 20 can be smoothly snapped into the receiving groove 33; when the connector 20 is set as a semi-circular structure, the receiving groove 33 is set as an arc-shaped groove structure so that the connector 20 can be smoothly accommodated in the receiving groove 33.

[0084] Therefore, through the above structure, the connector 20 is snapped into the receiving groove 33. On the one hand, this further increases the contact area between the connector 20 and the heat exchanger 30, i.e., increases the heat exchange surface area 32, and improves heat exchange efficiency. On the other hand, accommodating the connector 20 in the receiving groove 33 also further reduces the space occupied by the connector 20 in the housing, increasing the energy density of the battery device 100. In addition, the receiving groove 33 can also play a certain limiting role for the connector 20, making the connection between the connector 20 and the battery cell 10 more stable.

[0085] In some embodiments, the depth of the receiving groove 33 is not less than the thickness of the connector 20.

[0086] Specifically, the depth of the receiving groove 33 is greater than or equal to the thickness of the connector 20. In this way, the connector 20 can be better accommodated in the receiving groove 33, which can further reduce the space occupied by the connector 20 in the housing and improve the energy density of the battery device 100.

[0087] Based on the same concept as the battery device 100 described above, this application also provides an electrical device including the battery device 100 as described above.

[0088] According to one or more embodiments, in use, one end of the connector 20, bent at one end 21, is electrically connected to one of the positive terminals 12 via a conductive area, and the other end of the connector 20, bent at the other end 21, is electrically connected to the other positive terminal 12 via a conductive area. Simultaneously, another connector 20 is electrically connected between the negative terminals 13 at opposite ends in the same manner.

[0089] Thus, the connector 20 forms a connection between the positive terminals 12 and / or the negative terminals 13, which can effectively improve the overcurrent capacity between the electrode terminals 11 and / or the negative terminals 13.

[0090] In addition, the insulating area of ​​the connector 20 is fitted to the side of the battery cell 10, which increases the heat dissipation area and thus provides a good cooling effect on the electrode terminal 11.

[0091] After each connector 20 is connected to its corresponding battery cell 10, multiple battery cells 10 are arranged sequentially along their thickness direction a and placed in the housing. Then, a water-cooled plate is placed in the housing, with the heat exchange surface 32 of the water-cooled plate facing the battery cell 10, and the connectors 20 are snapped into the receiving grooves 33 on the heat exchange surface 32 one by one.

[0092] Coolant is introduced into the flow channel 31 of the water-cooled plate. During the flow of the coolant, heat exchange occurs between the battery cell 10 and the connector 20, thereby achieving cooling of the battery cell 10.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, include: The battery cell has electrode terminals on its outer surface; and A connector has a conductive area and an insulating area. The conductive area is electrically connected to the electrode terminal, and the insulating area is attached to at least a portion of the outer surface of the battery cell for cooling the electrode terminal. The connector includes a conductor and an insulating layer. The insulating layer is coated on a portion of the surface of the conductor to form the insulating area, and the area of ​​the conductor not coated with the insulating layer forms the conductive area.

2. The battery device according to claim 1, characterized in that, The electrode terminals include a plurality of terminals, and the connectors include a plurality of connectors, each of which has a connecting end and a free end disposed opposite to each other, and each connecting end forms a conductive area electrically connected to one of the electrode terminals.

3. The battery device according to claim 1, characterized in that, The electrode terminal includes at least two positive terminals, and at least two of the positive terminals are electrically connected to the connector. And / or, the electrode terminal includes at least two negative terminals, and at least two of the negative terminals are electrically connected to the connector.

4. The battery device according to any one of claims 1-3, characterized in that, The connector includes a bent portion and a main body portion that are perpendicular to each other. The bent portion is connected to at least one end of the main body portion, and the conductive area is formed on the bent portion. The area on the main body portion and / or the bent portion where the insulating area is formed is fitted to the outer surface of the battery cell.

5. The battery device according to any one of claims 1-3, characterized in that, In the thickness direction of the battery cell, the width of the connector is not greater than the thickness of the battery cell.

6. The battery device according to any one of claims 1-3, characterized in that, The connector is configured as a sheet structure.

7. The battery device according to claim 1, characterized in that, The battery device further includes a heat exchanger, the heat exchanger having a through-flow channel for the flow of a heat exchange medium, and the heat exchanger having a heat exchange surface that contacts the battery cell and / or the connector.

8. The battery device according to claim 7, characterized in that, A receiving groove is formed on the heat exchange surface, and the shape of the receiving groove matches the shape of the connector so that the connector can be snapped into the receiving groove.

9. The battery device according to claim 8, characterized in that, The depth of the receiving groove is not less than the thickness of the connector.

10. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-9.

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