Assembled battery and electric equipment

Abstract

The utility model discloses an assembled battery and electric equipment, and the assembled battery comprises at least two shells which are arranged in rows; the pole cores are respectively arranged in the shells; the switching assembly is arranged between the two adjacent shells, and the switching assembly is electrically connected with the pole cores in the two adjacent shells; the switching assembly comprises a cover plate, an injection molding part and electric connection assemblies, the electric connection assemblies are arranged on the two opposite sides of the cover plate, the electric connection assemblies are electrically connected with the pole cores in the two adjacent shells respectively, an electric path is formed between the electric connection assemblies and the pole cores, and the injection molding part is arranged between the cover plate and the electric connection assemblies. According to the assembled battery, the volume can be effectively saved, and the total voltage of the assembled battery is improved. And meanwhile, each shell in the assembled battery can be mutually independent, and effective balance between voltage and electricity reserve is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and more specifically, to a combined battery and electrical equipment. Background Art

[0002] Existing long batteries usually increase the total voltage of the package by connecting the batteries in series, but due to space requirements, the number of batteries that can be connected in series is limited. Alternatively, the batteries can be made into short batteries and connected in series, but multiple short batteries in series easily waste space and increase costs, and it is difficult to balance the voltage and power reserve. Utility Model Content

[0003] One purpose of the utility model is to provide a new technical solution for combining a battery and an electrical device, which can at least solve the problem in the prior art that there is no effective balance between voltage and power reserve.

[0004] According to a first aspect of the utility model, a battery assembly is provided, comprising: at least two shells, at least two of the shells are arranged in a row; pole cores, each of the shells is provided with the pole cores; a switching assembly, the switching assembly is provided between two adjacent shells, and the switching assembly is electrically connected to the pole cores in the two adjacent shells; the switching assembly comprises: a cover plate, an injection molded part, and an electrical connection assembly, the electrical connection assembly is provided on opposite sides of the cover plate, the electrical connection assembly is electrically connected to the pole cores in the two adjacent shells, an electrical path is formed between the electrical connection assembly and the pole cores, and the injection molded part is provided between the cover plate and the electrical connection assembly.

[0005] Optionally, the electrical connection assembly includes: a conductive member, which is arranged on a first side of the cover plate, and a portion of the conductive member passes through the cover plate, and the conductive member is electrically connected to the pole core; an electrical connector, which is arranged on a second side of the cover plate, and the conductive member passes through a portion of the cover plate to be connected to the electrical connector, and the injection molded part is arranged between the cover plate and the electrical connector.

[0006] Optionally, the cover plate is provided with a through hole penetrating along the thickness direction thereof, the electrical connector is provided with a matching hole corresponding to the through hole, and a portion of the conductive member passes through the through hole and is connected to the matching hole.

[0007] Optionally, the conductive member includes: a conductive body and a conductive column, the conductive body is arranged on the first side of the cover plate, the conductive column is arranged on the conductive body, the conductive column passes through the cover plate and is connected to the electrical connector, and the conductive column is electrically connected to the pole core.

[0008] Optionally, the through hole is arranged at a central position of the cover plate, and the conductive column is located at a central position of the conductive body.

[0009] Optionally, the cross-sections of the cover plate, the conductive member and the electrical connector are all square, and the orthographic projection area of ​​the conductive member on the cover plate is smaller than the cross-sectional area of ​​the cover plate, and the orthographic projection area of ​​the electrical connector on the cover plate is smaller than the cross-sectional area of ​​the cover plate.

[0010] Optionally, the injection molded part is a hollow annular body, and the injection molded part is provided in the connection area between the cover plate and the electrical connector.

[0011] Optionally, there are two shells, the two shells are respectively a first shell and a second shell, and the adapter assembly is provided between the first shell and the second shell.

[0012] Optionally, the assembled battery further includes: a first end cover and a second end cover, the first end cover is arranged at an end of the first shell away from the second shell, the second end cover is arranged at an end of the second shell away from the first shell, one of the first end cover and the second end cover is provided with a liquid injection hole, and the other is provided with an explosion-proof valve.

[0013] A second aspect of the present invention provides an electrical device, comprising the assembled battery described in the above embodiment.

[0014] The combined battery of the utility model is provided with a transfer assembly between two adjacent shells, and an electrical connection assembly in the transfer assembly and a pole core in the shell are used to form an electrical path. The cover plate and the electrical connection assembly are sealed and insulated by injection molding, so as to realize the electrical connection of the pole core in the combined battery, effectively save volume, and improve the overall voltage of the combined battery. At the same time, it can ensure that each shell in the combined battery is independent of each other, and realize an effective balance between voltage and power reserve.

[0015] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0018] Figure 2 is a top view of a battery pack according to an embodiment of the utility model;

[0019] Figure 3 is a cross-sectional view of a battery pack according to an embodiment of the utility model;

[0020] Figure 4 yes Figure 3 A partial enlarged view of the middle area A;

[0021] Figure 5 is a schematic structural diagram of a switching assembly according to an embodiment of the utility model;

[0022] Figure 6 is a structural exploded diagram of a switching assembly according to an embodiment of the utility model;

[0023] Figure 7 is a cross-sectional view of a switching assembly according to an embodiment of the utility model;

[0024] Figure 8 It is another cross-sectional view of the adapter assembly according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] Assembled battery 100;

[0027] First shell 11; first end cover 111; second shell 12; second end cover 121;

[0028] Adapter assembly 20; cover plate 21; through hole 211; injection molded part 22; electrical connection assembly 23; conductive part 231; conductive body 2311; conductive column 23122; electrical connection part 232; matching hole 233. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] In the specification and claims of the utility model, if the term "first" or "second" is involved, it may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the related objects are in an "or" relationship.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" involved 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The assembled battery 100 according to the embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

[0038] like Figures 1 to 4 As shown, the assembled battery 100 according to the embodiment of the present invention includes at least two shells, a pole core and a switching assembly 20 .

[0039] Specifically, at least two shells are arranged in a row. A pole core is provided in each shell. The adapter assembly 20 is provided between two adjacent shells, and the adapter assembly 20 is electrically connected to the pole cores in the two adjacent shells; the adapter assembly 20 includes: a cover plate 21, an injection molded part 22 and an electrical connection assembly 23, the electrical connection assembly 23 is provided on opposite sides of the cover plate 21, the electrical connection assembly 23 is electrically connected to the pole cores in the two adjacent shells, an electrical path is formed between the electrical connection assembly 23 and the shell, and an injection molded part 22 is provided between the cover plate 21 and the electrical connection assembly 23.

[0040] In other words, see Figures 1 to 4 The assembled battery 100 according to the embodiment of the utility model is mainly composed of at least two shells, a pole core and a switching assembly 20. Among them, at least two shells can be arranged in a row. A pole core is respectively arranged in each shell. A switching assembly 20 is arranged between two adjacent shells, see Figures 1 to 4 , two adjacent shells are connected by the adapter assembly 20, and the adapter assembly 20 is electrically connected to the pole cores in the two adjacent shells, so as to realize the series or parallel connection of multiple pole cores in the assembled battery 100 and improve the total voltage of the assembled battery 100. Under the same length of the assembled battery 100 of the utility model, the voltage of the assembled battery 100 can be effectively improved, and the package voltage can be further improved. Moreover, with the same package voltage, more batteries can be installed, which effectively saves volume and improves the total capacity of the package. Figures 5 to 8 As shown, the adapter assembly 20 is mainly composed of a cover plate 21, an injection molded part 22 and an electrical connection assembly 23, wherein the electrical connection assembly 23 is installed on opposite sides of the cover plate 21, and the electrical connection assembly 23 is electrically connected to the pole cores in two adjacent shells respectively. Specifically, two opposite end faces of the cover plate 21 form convex edges, and the two convex edges are electrically connected to the pole cores in two adjacent shells respectively. An electrical path is formed between the electrical connection assembly 23 and the pole core, and an injection molded part 22 is arranged between the cover plate 21 and the electrical connection assembly 23. The injection molded part 22 can adopt a nano injection molded insulator, so as to seal and insulate the two adjacent shells and ensure the independence of the two shells.

[0041] Therefore, according to the assembled battery 100 of the embodiment of the utility model, by arranging the adapter assembly 20 between two adjacent shells, an electrical path is formed by using the electrical connection assembly 23 in the adapter assembly 20 and the pole core in the shell, and the cover plate 21 and the electrical connection assembly 23 are sealed and insulated by the injection molded part 22, so as to realize the electrical connection of the pole core in the assembled battery 100, effectively save the volume, and improve the overall voltage of the assembled battery 100.

[0042] The assembled battery 100 of the utility model can not only connect the pole cores in the shell in series to increase the overall voltage of the battery, but also ensure that the shells in the assembled battery 100 are independent of each other to achieve an effective balance between voltage and power reserve. Under the same usage space, the voltage of the assembled battery 100 is effectively increased. Moreover, under the same usage space, the problem of small package capacity and high cost is solved compared with multiple battery packages.

[0043] According to an embodiment of the present invention, the electrical connection assembly 23 includes a conductive member 231 and an electrical connection member 232 .

[0044] Specifically, the conductive member 231 is disposed on the first side of the cover plate 21, and a portion of the conductive member 231 passes through the cover plate 21, and the conductive member 231 is electrically connected to the pole core. The electrical connector 232 is disposed on the second side of the cover plate 21, and the portion of the conductive member 231 passing through the cover plate 21 is connected to the electrical connector 232, and an injection molded part 22 is disposed between the cover plate 21 and the electrical connector 232.

[0045] That is to say, Figure 6 and Figure 7 As shown, the electrical connection assembly 23 is mainly composed of a conductive member 231 and an electrical connector 232. The conductive member 231 is arranged on the first side of the cover plate 21, and a portion of the conductive member 231 can pass through the cover plate 21. The conductive member 231 can be electrically connected to the pole core. The electrical connector 232 is arranged on the second side of the cover plate 21, and the first side and the second side of the cover plate 21 are opposite sides of the cover plate 21. The portion of the conductive member 231 passing through the cover plate 21 is connected to the electrical connector 232 to form an electrical path. An injection molded part 22 is arranged between the cover plate 21 and the electrical connector 232 to ensure that the two adjacent shells are independent of each other.

[0046] According to an embodiment of the present invention, the cover plate 21 is provided with a through hole 211 penetrating along its thickness direction, the electrical connector 232 is provided with a matching hole 233 corresponding to the through hole 211 , and a portion of the conductive member 231 passes through the through hole 211 and is connected to the matching hole 233 .

[0047] In other words, Figure 5 and Figure 6 As shown, the cover plate 21 is provided with a through hole 211, which penetrates along the thickness direction thereof. The electrical connector 232 is provided with a matching hole 233 corresponding to the through hole 211. A portion of the conductive member 231 can pass through the through hole 211 and extend into the matching hole 233 to be connected with the matching hole 233, thereby realizing electrical connection between the conductive member 231 and the electrical connector 232.

[0048] According to one embodiment of the utility model, the conductive member 231 includes: a conductive body 2311 and a conductive column 2312, the conductive body 2311 is arranged on the first side of the cover plate 21, the conductive column 2312 is arranged on the conductive body 2311, the conductive column 2312 passes through the cover plate 21 and is connected to the electrical connector 232, and the conductive column 2312 is electrically connected to the pole core.

[0049] That is to say, Figures 6 to 8As shown, the conductive member 231 is mainly composed of a conductive body 2311 and a conductive column 2312, wherein the conductive body 2311 is arranged on the first side of the cover plate 21, the conductive column 2312 is arranged on the conductive body 2311, the conductive column 2312 can pass through the cover plate 21 to connect with the electrical connector 232, and the conductive column 2312 is electrically connected to the pole core to achieve electrical connection between the conductive column 2312, the electrical connector 232 and the pole core. The conductive member 231 can be integrally formed to improve the overall structural strength of the conductive member 231 and reduce the difficulty and cost of forming the conductive member 231.

[0050] According to an embodiment of the present invention, the through hole 211 is disposed at the center of the cover plate 21 , and the conductive column 2312 is located at the center of the conductive body 2311 .

[0051] In other words, Figure 5 and Figure 6 As shown, the through hole 211 can be set at the center of the cover plate 21 , and the conductive column 2312 can be set at the center of the conductive body 2311 , so as to facilitate the assembly and connection of the conductive member 231 , the electrical connector 232 and the cover plate 21 .

[0052] According to one embodiment of the utility model, the cross-sections of the cover plate 21, the conductive member 231 and the electrical connector 232 are all square, and the orthographic projection area of ​​the conductive member 231 on the cover plate 21 is smaller than the cross-sectional area of ​​the cover plate 21, and the orthographic projection area of ​​the electrical connector 232 on the cover plate 21 is smaller than the cross-sectional area of ​​the cover plate 21.

[0053] That is to say, Figure 6 and Figure 7 As shown, the cross-sections of the cover plate 21, the conductive member 231 and the electrical connector 232 can all be set to a square shape corresponding to the side shape of the battery. The orthographic projection area of ​​the conductive member 231 on the cover plate 21 is smaller than the cross-sectional area of ​​the cover plate 21, and the orthographic projection area of ​​the electrical connector 232 on the cover plate 21 is smaller than the cross-sectional area of ​​the cover plate 21, which facilitates the assembly and connection of the cover plate 21, the conductive member 231 and the electrical connector 232 with the battery, while ensuring that the overall space occupied by the assembled battery 100 is minimized.

[0054] According to an embodiment of the present invention, the injection molded part 22 is a hollow annular body, and the injection molded part 22 is provided in the connection area between the cover plate 21 and the electrical connector 232 .

[0055] That is, see Figure 6 The injection molded part 22 can be formed into a hollow ring body by injection molding of nano insulating material, and the connection area between the cover plate 21 and the electrical connector 232 is molded with the injection molded part 22. The two adjacent batteries can be effectively insulated by the nano injection molded insulator (injection molded part 22), ensuring the independence of the two adjacent shells.

[0056] According to an embodiment of the present invention, there are two shells, the two shells are respectively a first shell and a second shell, and a switching assembly 20 is provided between the first shell and the second shell.

[0057] In other words, Figure 1 and Figure 2 As shown, the number of shells can be two, and the two shells are respectively a first shell 11 and a second shell 12, wherein an adapter assembly 20 is arranged between the first shell 11 and the second shell 12. By arranging the adapter assembly 20 between the first shell 11 and the second shell 12, an electrical path is formed between the electrical connection assembly 23 in the adapter assembly 20 and the cover plate 21, and the injection molding part 22 is used for sealing and insulation, the first shell 11 and the second shell 12 can be connected in series to increase the overall voltage of the assembled battery 100. At the same time, it can ensure that the first shell 11 and the second shell 12 are independent of each other, and achieve an effective balance between voltage and power reserve. Under the same use space, the voltage of the assembled battery 100 is effectively increased. And under the same use space, compared with the multi-battery package, the problem of small package capacity and high cost is solved.

[0058] According to one embodiment of the utility model, the assembled battery 100 further includes: a first end cover 111 and a second end cover 121, the first end cover 111 is arranged at one end of the first shell body away from the second shell body 12, the second end cover 121 is arranged at one end of the second shell body 12 away from the first shell body 11, one of the first end cover 111 and the second end cover 121 is provided with a liquid injection hole, and the other is provided with an explosion-proof valve.

[0059] That is to say, Figure 2 As shown, the assembled battery 100 further includes a first end cap 111 and a second end cap 121. The first end cap 111 is mounted on an end of the first shell 11 away from the second shell 12, and the second end cap 121 is mounted on an end of the second shell 12 away from the first shell 11. The cover plate 21 in the connection assembly of the utility model does not need to be arranged with structures such as injection holes and explosion-proof valves. By providing an injection hole in one of the first end cap 111 and the second end cap 121, and providing an explosion-proof valve in the other, other functional structural parts of the battery are integrated, so as to ensure that the overall size of the assembled battery 100 is smaller, the structure is simpler, and the cost is lower. Of course, in the assembled battery 100, the number of shells can be specifically set according to actual needs, and will not be described in detail in the utility model.

[0060] In the present invention, the adapter assembly 20 is welded to the aluminum shells outside the first shell 11 and the second shell 12 respectively (the two end faces of a circle of convex edges around the cover plate 21 are welded to the aluminum shells of the first shell 11 and the second shell 12 respectively), forming a seal while connecting the first shell 11 and the second shell 12 together, thereby improving the overall voltage of the assembled battery 100.

[0061] The assembled battery 100 is connected in the middle by the adapter assembly 20, and the cover plate 21 cannot be provided with a liquid injection hole, an explosion-proof valve, etc. Therefore, the first end cover 111 and the second end cover 121 can integrate the liquid injection hole, the explosion-proof valve, etc. on their main bodies.

[0062] In this utility model, see Figures 1 to 8 , the cover plate 21 and the conductive member 231 can be pre-processed first, and then the insulating material (injection molded part 22) can be injection molded to form a small component. After the small component becomes a whole, the electrical connector 232 is assembled to the back of the injection molded part 22, the middle hole (matching hole 233) of the electrical connector 232 is matched with the conductive column 2312, and the two are connected by welding, and finally all the components form a whole. The seal between the first shell 11 and the second shell 12 adopts the nano injection molding joint surface of the injection molded part 22.

[0063] There are electrical connectors 232 on both sides of the cover plate 21 of the adapter assembly 20. The middle conductive column 2312 connects the electrical connectors 232 on both sides to form an electrical path, and the first shell 11 and the second shell 12 are insulated and isolated by a nano injection molded insulator (injection molded part 22) to ensure that the two shells are independent.

[0064] In the present invention, when the assembled battery 100 is used in a lithium battery series, the electrical connection part can be distinguished between copper and aluminum, matching the electrodes (negative copper, positive aluminum) of the middle lead-out terminals of the first shell 11 and the second shell 12. When the assembled battery 100 is used in a sodium battery series, the electrical connection part is not distinguished, and aluminum is used (both the positive and negative electrodes of the sodium battery are aluminum).

[0065] In summary, according to the assembled battery 100 of the embodiment of the utility model, by setting the adapter assembly 20 between two adjacent shells, the electrical connection assembly 23 in the adapter assembly 20 and the pole core in the shell are used to form an electrical path, and the cover plate 21 and the electrical connection assembly 23 are sealed and insulated by the injection molded part 22, so as to realize the electrical connection of the pole core in the assembled battery 100, effectively save the volume, and improve the overall voltage of the assembled battery 100.

[0066] The assembled battery 100 of the utility model can not only connect the pole cores in the shell in series to increase the overall voltage of the battery, but also ensure that the shells in the assembled battery 100 are independent of each other to achieve an effective balance between voltage and power reserve. Under the same usage space, the voltage of the assembled battery 100 is effectively increased. Moreover, under the same usage space, the problem of small package capacity and high cost is solved compared with multiple battery packages.

[0067] Of course, for those skilled in the art, other structures and working principles of the assembled battery 100 are understandable and achievable, and will not be described in detail in the present invention.

[0068] According to the second aspect of the utility model, an electrical device is provided, comprising the assembled battery 100 in the above embodiment. Since the assembled battery 100 according to the embodiment of the utility model has the above technical effects, the electrical device according to the embodiment of the utility model should also have the corresponding technical effects, that is, the electrical device of the utility model can connect the pole cores in two adjacent shells in series or in parallel by adopting the assembled battery 100 to improve the overall voltage of the assembled battery 100. At the same time, it can ensure that the shells are independent of each other to achieve an effective balance between voltage and power reserve. In the same use space, the voltage of the assembled battery 100 is effectively improved. And in the same use space, compared with multiple battery packs, the problem of small pack capacity and high cost is solved.

[0069] Of course, for those skilled in the art, other structures and working principles of the electrical equipment are understandable and achievable, and will not be described in detail in the present utility model.

[0070] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery pack, characterized in that: include: at least two shells, at least two of the shells are arranged in a row; A pole core, each of the shells is provided with the pole core; A transition assembly, the transition assembly is disposed between two adjacent shells, and the transition assembly is electrically connected to the pole cores in the two adjacent shells; The adapter assembly includes: a cover plate, an injection molded part and an electrical connection assembly. The electrical connection assembly is arranged on opposite sides of the cover plate, and the electrical connection assembly is electrically connected to the pole cores in two adjacent shells respectively. An electrical path is formed between the electrical connection assembly and the pole core, and the injection molded part is arranged between the cover plate and the electrical connection assembly.

2. The assembled battery according to claim 1, characterized in that: The electrical connection assembly comprises: A conductive member, wherein the conductive member is disposed on a first side of the cover plate, a portion of the conductive member passes through the cover plate, and the conductive member is electrically connected to the pole core; An electrical connector is provided on the second side of the cover plate, and the conductive member passes through a portion of the cover plate and is connected to the electrical connector, and the injection molded part is provided between the cover plate and the electrical connector.

3. The assembled battery according to claim 2, characterized in that: The cover plate is provided with a through hole penetrating along the thickness direction thereof, the electrical connector is provided with a matching hole corresponding to the through hole, and a part of the conductive member passes through the through hole and is connected to the matching hole.

4. The assembled battery according to claim 3, characterized in that: The conductive member includes: a conductive body and a conductive column, wherein the conductive body is arranged on the first side of the cover plate, the conductive column is arranged on the conductive body, the conductive column passes through the cover plate and is connected to the electrical connector, and the conductive column is electrically connected to the pole core.

5. The assembled battery according to claim 4, characterized in that: The through hole is arranged at the center of the cover plate, and the conductive column is located at the center of the conductive body.

6. The assembled battery according to claim 2, characterized in that: The cross-sections of the cover plate, the conductive member and the electrical connector are all square, and the orthographic projection area of ​​the conductive member on the cover plate is smaller than the cross-sectional area of ​​the cover plate, and the orthographic projection area of ​​the electrical connector on the cover plate is smaller than the cross-sectional area of ​​the cover plate.

7. The assembled battery according to claim 2, characterized in that: The injection molded part is a hollow annular body, and the injection molded part is provided in the connection area between the cover plate and the electrical connector.

8. The assembled battery according to claim 1, characterized in that: There are two shells, the two shells are respectively a first shell and a second shell, and the adapter assembly is arranged between the first shell and the second shell.

9. The assembled battery according to claim 8, characterized in that: Also includes: A first end cover and a second end cover, wherein the first end cover is arranged at one end of the first shell away from the second shell, and the second end cover is arranged at one end of the second shell away from the first shell, and one of the first end cover and the second end cover is provided with a liquid injection hole, and the other is provided with an explosion-proof valve.

10. An electrical device, characterized in that: A battery assembly comprising any one of claims 1 to 9.

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