Battery assembly

Abstract

The utility model relates to a battery assembly. The battery assembly comprises a cover body, a shell, a battery cell and a circuit board assembly, the cover body and the shell are both made of plastics, the cover body and the shell are in sealed connection in an ultrasonic welding mode to form a containing cavity, the battery cell and the circuit board assembly are both fixedly arranged in the containing cavity, the circuit board assembly is electrically connected with the battery cell, the circuit board assembly is provided with a terminal, and the terminal is electrically connected with the battery cell. The shell is provided with an avoiding groove which is arranged opposite to the terminal. The scheme provided by the utility model can reduce the cost and can be sold independently.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery assembly. Background Art

[0002] In related technologies, for replaceable batteries, the battery cells are usually placed in a rubber frame, and the battery cells, the rubber frame and the output terminals are formed into an integral solid structure by injection molding with molten glue. However, such batteries are large in volume and weight, high in cost, and are easily disassembled by users to expose the battery cells, which do not meet the certification requirements of UL2054 LISTED and cannot be sold separately. Summary of the Utility Model

[0003] To solve or partially solve the problems existing in the related technologies, this application provides a battery assembly, which can reduce costs and can be sold separately.

[0004] This application provides a battery assembly, including: a cover body, a housing, a battery cell and a circuit board assembly;

[0005] Both the cover body and the housing are made of plastic. The cover body and the housing are hermetically connected by ultrasonic welding to form a receiving cavity. The battery cell and the circuit board assembly are both fixedly arranged in the receiving cavity. The circuit board assembly is electrically connected to the battery cell. The circuit board assembly is provided with terminals, and the housing is provided with avoidance grooves oppositely arranged with the terminals.

[0006] Further, the four peripheral edges of the cover body are provided with downwardly extending side walls, the four peripheral edges of the housing are provided with upwardly extending side walls. The lower ends of the side walls of the cover body are connected to the upper ends of the side walls of the housing. The avoidance grooves are arranged on the side walls of the housing.

[0007] Further, the lower ends of the side walls of the cover body are provided with first stepped structures, the upper ends of the side walls of the housing are provided with second stepped structures, and the first stepped structures are fitted with the second stepped structures.

[0008] Further, the inner sides of the lower ends of the side walls of the cover body are provided with downwardly protruding flanges, the inner sides of the upper ends of the side walls of the housing are provided with grooves, and the protrusions are fitted in the grooves.

[0009] Further, the circuit board assembly includes a PCB board. The number of the terminals is multiple, and the multiple terminals are linearly and spacedly arranged on the PCB board. The number of the avoidance grooves is multiple, and the multiple avoidance grooves are arranged in one-to-one correspondence with the multiple terminals.

[0010] Further, the terminals are located in the avoidance grooves and do not protrude from the outer wall of the housing.

[0011] Further, the above battery assembly further includes a tape, and the tape is adhered between the bottom surface of the battery cell and the inner bottom surface of the housing.

[0012] Further, the above battery assembly further includes a foam, and the foam is disposed between the top surface of the battery cell and the cover body.

[0013] Further, the above battery assembly further includes an insulating sheet, and the insulating sheet is disposed between the circuit board assembly and the battery cell.

[0014] Further, the above battery assembly further includes a label, and the label is disposed on the upper end surface of the cover body.

[0015] The technical solution provided by this application may include the following beneficial effects: The cover body and the housing are ultrasonically welded to form a receiving cavity to wrap the battery cell, and an avoidance groove opposite to the terminal is provided on the housing for the battery to supply power to the electrical device. Compared with the structure using injection molding and filling, the battery assembly of this application is lighter in weight and lower in cost, can meet the UL2054 LISTED test requirements, cannot be disassembled by users, and meets the requirements for separate sale.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By describing the exemplary embodiments of this application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of this application will become more obvious. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0018] Figure 1 is a schematic structural diagram of the battery assembly shown in the embodiment of this application;

[0019] Figure 2 is an exploded schematic diagram of the battery assembly shown in the embodiment of this application;

[0020] Figure 3 is a schematic structural diagram of the cover body shown in the embodiment of this application;

[0021] Figure 4 is a schematic structural diagram of the housing shown in the embodiment of this application.

[0022] Reference Numerals:

[0023] 1. Cover body; 11. First stepped structure; 12. Flange; 2. Housing; 21. Avoidance groove; 22. Second stepped structure; 23. Groove; 3. Battery cell; 4. Circuit board assembly; 41. Terminal; 42. PCB board; 5. Tape; 6. Foam; 7. Insulating sheet; 8. Label. Detailed Implementation Modes

[0024] The implementation modes of the present application will be described in more detail with reference to the accompanying drawings. Although the implementation modes of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the implementation modes set forth herein. On the contrary, these implementation modes are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0025] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0027] Unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] In the related art, for a replaceable battery, a battery cell is usually placed in a plastic frame, and the battery cell, the plastic frame and the output terminal 41 are formed into an integral entity structure by injection molding and filling with molten glue. However, such a battery is large in volume and weight, and the battery cost is high. Moreover, the plastic frame needs to leave positions for injection molding and component installation, and is usually not closed. The filled molten glue is relatively soft and is easily disassembled by the user to expose the battery cell, which does not meet the certification requirements of UL2054 LISTED and cannot be sold separately.

[0029] In view of the above problems, an embodiment of the present application provides a battery assembly, which can reduce costs and can be sold separately.

[0030] The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0031] As Figures 1 to 4 shown, an embodiment of the present application provides a battery assembly, which includes a cover body 1, a housing 2, a battery cell 3, and a circuit board assembly 4.

[0032] Both the cover body 1 and the housing 2 are made of plastic. The cover body 1 is disposed at the opening at the upper end of the housing 2, and the cover body 1 and the housing 2 are hermetically connected by ultrasonic welding to form a receiving cavity. The plastic ultrasonic welding process is a fast, clean, and effective assembly process for assembling thermoplastic fittings and some composite components. When ultrasonic waves act on the thermoplastic plastic contact surface, high-frequency vibrations of tens of thousands of times per second will be generated. This high-frequency vibration transmits ultrasonic energy to the welding area through the upper welding part. Since the acoustic resistance at the welding area, that is, the interface of the two welds, is large, local high temperature will be generated. Due to the poor thermal conductivity of plastics, the heat cannot be dissipated in time for a while and accumulates in the welding area, causing the contact surfaces of the two plastics to melt rapidly. After applying a certain pressure, the two plastic parts are fused into one. When the ultrasonic wave stops acting, keep the pressure for a few seconds to make it solidify and form a strong molecular chain to achieve the purpose of welding, and the welding strength can be close to the strength of the raw material.

[0033] Among them, the plastic materials of the cover body 1 and the housing 2 can meet the requirements of the V-0 fire protection grade to ensure the safety of the battery.

[0034] Both the battery cell 3 and the circuit board assembly 4 are fixedly disposed in the receiving cavity. The circuit board assembly 4 is electrically connected to the battery cell 3. The circuit board assembly 4 is provided with a terminal 41, and the housing 2 is provided with an avoidance groove 21 opposite to the terminal 41. The avoidance groove 21 penetrates the wall surface of the housing 2 so that the terminal 41 can be connected to an external device. The terminal 41 can be electrically connected to an external electrical device through the avoidance groove 21 to supply power to the electrical device. In some embodiments, the terminal 41 can also be electrically connected to a charging device to charge the battery cell 3. The terminal 41 can be a metal terminal.

[0035] By forming a receiving cavity through ultrasonic welding of the cover body 1 and the housing 2 to wrap the battery cell 3, and providing an avoidance groove 21 opposite to the terminal 41 on the housing 2 for the battery to supply power to the electrical device, compared with the structure using injection molding and filling, the battery assembly of the present application is lighter in weight and lower in cost, can meet the UL2054 LISTED test requirements, cannot be disassembled by users, and meets the requirements for separate sales.

[0036] In some embodiments, the peripheral edges of the cover 1 are provided with side walls extending downward, and the peripheral edges of the housing 2 are provided with side walls extending upward. The lower ends of the side walls of the cover 1 are connected to the upper ends of the side walls of the housing 2, so that the lower ends of the side walls of the cover 1 and the upper ends of the side walls of the housing 2 are connected into one body by ultrasonic welding. The avoidance groove 21 is provided in the side wall of the housing 2 to facilitate the electrical connection between the terminal 41 and the electrical device.

[0037] In some embodiments, such as Figure 2 and Figure 3 shown, the lower end of the side wall of the cover 1 is provided with a first step structure 11, and the upper end of the side wall of the housing 2 is provided with a second step structure 22. The first step structure 11 and the second step structure 22 are fitted together. In this way, the connection between the housing 2 and the cover 1 is not only a planar connection, which can increase the contact area. The fitting method can improve the connection firmness after ultrasonic welding, and can also facilitate positioning when the cover 1 and the housing 2 are matched.

[0038] In some embodiments, such as Figure 2 and Figure 3 shown, the inner side of the lower end of the side wall of the cover 1 is provided with a downward protruding flange 12 to form a first step structure 11, and the inner side of the upper end of the side wall of the housing 2 is provided with a groove 23 to form a second step structure 22. The protrusion is fitted into the groove 23.

[0039] In some embodiments, the circuit board assembly 4 includes a PCB board 42. The number of terminals 41 is multiple, and the multiple terminals 41 are linearly arranged at intervals on the PCB board 42. There are multiple avoidance grooves 21, and the multiple avoidance grooves 21 are arranged in one-to-one correspondence with the multiple terminals 41. Specifically, the multiple terminals 41 are arranged along the width direction of the housing 2. In this embodiment, the number of both the terminals 41 and the avoidance grooves 21 is three.

[0040] In some embodiments, the terminal 41 is located within the avoidance groove 21 and does not protrude from the outer wall of the housing 2, which can protect the terminal 41 and the circuit board assembly 4 from being easily damaged and can also prevent short circuits during transportation. In this way, the battery assembly can also meet the UL2054 LISTED test requirements as a whole. The user cannot disassemble it, and it can be sold separately.

[0041] In some embodiments, such as Figure 2 shown, the battery assembly further includes a tape 5. The tape 5 is pasted between the bottom surface of the battery cell 3 and the inner bottom surface of the housing 2 to fixedly connect the battery cell 3 to the housing 2 and prevent the battery cell 3 from shifting. Among them, the tape 5 can be a double-sided tape 5 made of acrylic pressure-sensitive adhesive PSA material.

[0042] In some embodiments, such as Figure 2As shown, the battery assembly further includes a foam 6 disposed between the top surface of the battery cell 3 and the cover 1. The foam 6 is used to prevent the battery cell 3 from shaking and being damaged, and from being squeezed by the upper cover after expansion. The foam 6 can be made of a foaming material Foam.

[0043] In some embodiments, as Figure 2 shown, the battery assembly further includes an insulating sheet 7 disposed between the circuit board assembly 4 and the battery cell 3, for preventing a short circuit between the circuit board assembly 4 and the battery cell 3. Among them, the insulating sheet 7 can be made of an aramid Nomex material.

[0044] In some embodiments, as Figure 1 and Figure 2 shown, the battery assembly further includes a label sticker 8 disposed on the upper end surface of the cover 1. The label sticker 8 is a certification label for the battery, containing all the certification information of the battery.

[0045] The solutions of the present application have been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0046] The various embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

Claims

1. A battery assembly, characterized in that: include: A cover (1), a housing (2), a battery cell (3) and a circuit board assembly (4); The cover body (1) and the shell (2) are both made of plastic; the cover body (1) and the shell (2) are sealed and connected by ultrasonic welding to form a receiving cavity; the battery cell (3) and the circuit board assembly (4) are both fixedly arranged in the receiving cavity; the circuit board assembly (4) is electrically connected to the battery cell (3); the circuit board assembly (4) is provided with a terminal (41); and the shell (2) is provided with an avoidance groove (21) arranged opposite to the terminal (41).

2. The battery assembly according to claim 1, characterized in that: The edges of the cover body (1) are provided with side walls extending downwards, the edges of the shell body (2) are provided with side walls extending upwards, the lower end of the side wall of the cover body (1) is connected to the upper end of the side wall of the shell body (2), and the avoidance groove (21) is provided on the side wall of the shell body (2).

3. The battery assembly according to claim 2, characterized in that: A first step structure (11) is provided at the lower end of the side wall of the cover body (1), and a second step structure (22) is provided at the upper end of the side wall of the shell body (2), wherein the first step structure (11) is engaged with the second step structure (22).

4. The battery assembly according to claim 3, characterized in that: A flange (12) protruding downward is provided on the inner side of the lower end of the side wall of the cover body (1), and a groove (23) is provided on the inner side of the upper end of the side wall of the shell (2), and the protrusion is embedded in the groove (23).

5. The battery assembly according to claim 1, characterized in that: The circuit board assembly (4) comprises a PCB board (42), the number of the terminals (41) is multiple, the multiple terminals (41) are linearly spaced and arranged on the PCB board (42), the number of the avoidance grooves (21) is multiple, and the multiple avoidance grooves (21) are arranged in a one-to-one correspondence with the multiple terminals (41).

6. The battery assembly according to claim 1, characterized in that: The terminal (41) is located in the avoidance groove (21) and does not protrude from the outer wall of the housing (2).

7. The battery assembly according to claim 1, characterized in that: It also includes an adhesive tape (5), wherein the adhesive tape (5) is adhered between the bottom surface of the battery core (3) and the inner bottom surface of the shell (2).

8. The battery assembly according to claim 1, characterized in that: It also includes foam (6), which is arranged between the top surface of the battery core (3) and the cover (1).

9. The battery assembly according to claim 1, characterized in that: It also comprises an insulating sheet (7), wherein the insulating sheet (7) is arranged between the circuit board assembly (4) and the battery core (3).

10. The battery assembly according to claim 1, characterized in that: It also comprises a label (8), wherein the label (8) is arranged on the upper end surface of the cover body (1).

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