Insulating spacer for rechargeable battery and rechargeable battery

Abstract

The utility model discloses an insulating spacer for a rechargeable battery and the rechargeable battery, the insulating spacer comprises a spacer body, and the diameter of the spacer body is matched with the diameter of a battery cell of the rechargeable battery; the gasket body is provided with an electric connecting piece window, and when the insulating gasket is attached to the positive electrode end of a battery cell of the rechargeable battery, the electric connecting piece window is used for exposing a positive electrode cap of the rechargeable battery; the gasket body is provided with at least one cutter groove, and the cutter groove is connected with or not connected with the electric connection piece window. According to the insulating spacer for the rechargeable battery and the rechargeable battery provided by the utility model, the problems that the insulating spacer is uneven and not firm enough after being attached are solved, and the insulating spacer is convenient to weld and accurately position during assembly, so that the safety and the yield are improved.

Description

Technical Field

[0001] The utility model relates to the field of rechargeable batteries, in particular to an insulating gasket for rechargeable batteries and the rechargeable battery. Background Art

[0002] During the manufacturing process of rechargeable batteries, an insulating gasket is usually required to prevent the positive electrode in the middle of the battery cell from short-circuiting due to accidental contact with the negative electrode on its circumference. At present, because the positive cap in the middle of the positive electrode of the battery cell is slightly higher than the negative electrode on the circumference, the insulating gasket is uneven and not firm enough after being attached; in addition, the positive cap needs to be connected to the outside world during assembly. The positive cap, as a welding surface, is usually not on the same axis as the welding surface of the electrical connection piece, which will affect the structural dimensions and cause a short circuit due to accidental touch, which is not only a safety hazard, but also affects the yield rate. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, an insulating gasket for a rechargeable battery and a rechargeable battery are proposed, which solves the problem that the insulating gasket is uneven and not firm enough after being affixed, and is easy to weld and accurately position during assembly, thereby improving safety and yield rate.

[0004] An insulating gasket for a rechargeable battery comprises a gasket body, the diameter of which matches the diameter of a cell of the rechargeable battery; an electrical connection piece window is provided on the gasket body, and when the insulating gasket is attached to the positive terminal of the cell of the rechargeable battery, the electrical connection piece window is used to expose the positive electrode cap of the rechargeable battery; at least one knife groove is provided on the gasket body, and the knife groove is connected to or not connected to the electrical connection piece window.

[0005] A rechargeable battery comprises a rechargeable battery cell, a battery controller and the insulating gasket as described above; the battery controller is arranged at the positive terminal of the rechargeable battery, and the insulating gasket is arranged between the battery controller and the positive terminal of the rechargeable battery cell.

[0006] The utility model provides an insulating gasket for a rechargeable battery and a rechargeable battery. The knife groove on the insulating gasket allows the gasket body to be easily deformed when attached, so that it can better fit the battery core and is more secure and not easy to loosen. The electrical connecting piece window is used to align the electrical connecting piece with the empty position for welding during assembly, so as to facilitate and accurately position the electrical connecting piece without causing deviation and avoiding the problem of short circuit. At the same time, it reduces safety hazards and improves the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a three-dimensional diagram of an insulating gasket;

[0008] Figure 2 It is a bottom view of the insulating gasket;

[0009] Figure 3 It is a schematic diagram of the insulating gasket assembly structure;

[0010] Figure 4 This is a schematic diagram of the insulating gasket after assembly;

[0011] Figure 5 It is a partial cross-sectional view of the insulating gasket assembly structure;

[0012] Figure 6 is a three-dimensional diagram of a rechargeable battery;

[0013] Figure 7 is a cross-sectional view of a rechargeable battery;

[0014] Figure 8 An exploded view of a rechargeable battery;

[0015] Fig. 9 is a three-dimensional diagram of a battery controller;

[0016] Fig.10 is another three-dimensional diagram of the battery controller;

[0017] Fig.11 is a side view of a battery controller;

[0018] Fig.12 This is an exploded view of the battery controller;

[0019] Fig.13 This is a partial enlarged view of the battery controller;

[0020] Fig.14 is a cross-sectional view of a battery controller;

[0021] The symbols in the drawings of the specification are as follows:

[0022] 100, rechargeable battery; 101, rechargeable battery cell; 102, insulating gasket; 103, controller support frame; 104, control board; 105, controller inner shell; 106, controller outer shell; 107, controller cover; 108, positive electrode cap; 109, controller annular heat sink; 110, controller inner electrode sheet;

[0023] 200, battery controller; 201, controller cover; 202, controller outer shell; 203, controller inner shell; 204, controller control board; 205, controller support frame; 206, controller positive electrode cap; 207, controller inner electrode sheet; 208, potting glue injection hole; 209, potting glue exhaust hole; 210, inner electrode sheet welding hole; 211, positive electrode cap slot; 212, cover buckle; 213, annular metal sheet; 214, USB isolation sheet; 215, LED indicator; 216, inner electrode sheet through hole; 217, controller inner shell; 218, USB connector;

[0024] 500, insulating gasket; 501, electrical connection piece window; 502, knife groove;

[0025] 601, insulating gasket; 602, battery cell; 603, knife groove; 604, electrical connection piece window; 605, battery cell positive electrode cap. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] like Figures 1 to 5 As shown, an insulating gasket 500 / 601 for a rechargeable battery is provided, comprising a gasket body, the diameter of which matches the diameter of a battery cell 602 of the rechargeable battery; an electrical connection piece window 501 / 604 is provided on the gasket body, and when the insulating gasket is attached to the positive terminal of the battery cell of the rechargeable battery, the electrical connection piece window is used to expose the positive electrode cap 605 of the rechargeable battery; at least one knife groove 502 / 603 is opened on the gasket body, and the knife groove is connected to the electrical connection piece window or not connected.

[0028] The specific shape of the electrical connection piece window is not limited, and can be circular, semicircular, rectangular or polygonal, etc. The position of the electrical connection piece window can be the geometric center of the gasket body or a position close to the geometric center to adapt to the specific design of the product. The electrical connection piece window facilitates accurate positioning of the positive electrode connection piece during welding, so as not to cause problems such as offset and short circuit, which affect product assembly.

[0029] The knife groove can be arc-shaped or straight-line-shaped, but is not limited thereto; the knife groove allows the insulating gasket to deform easily after being attached, avoiding the problem of unevenness, making the insulating gasket fit more tightly to the battery cell and not easy to loosen. For example, for a battery with a diameter of 18mm, the diameter of its positive cap is 9mm, and the positive cap protrudes from the circumferential edge by about 0.3-0.6mm. In the case of a knife groove, the insulating gasket is easy to deform, and the attachment is better.

[0030] In one implementation, the electrical connection piece window is rectangular and located near the geometric center of the gasket body; there are two knife grooves, each of which is arc-shaped and forms a nearly circular circle with the geometric center of the gasket body as the center; each knife groove is not connected to the electrical connection piece window. Among them, opening a knife groove on each side of the electrical connection piece can make the insulating gasket easier to deform and thus better adhere.

[0031] Based on the above insulating gasket, a rechargeable battery is provided, such as Figures 6 to 14 As shown, it includes a rechargeable battery cell 101, a battery controller 200 and the insulating gasket 102 as mentioned above; the battery controller is arranged at the positive terminal of the rechargeable battery, and the insulating gasket is arranged between the battery controller and the positive terminal of the rechargeable battery cell.

[0032] Specifically, the battery controller mainly includes a control board 104 / 204, a support frame 103 / 205 of insulating material, an inner shell 105 / 203 / 217 of conductive material and an outer shell 106 / 202.

[0033] At least one of the front and back sides of the control board is provided with circuit components, and the circuit components include but are not limited to conventional electronic components such as a main control IC, which will not be described in detail here.

[0034] The front of the control board is provided with a positive electrode cap 108 / 206 made of a metal conductive material and an annular heat sink 109 / 213. The height of the heat sink is not higher than the height of the positive electrode cap, and the heat sink is made of heat dissipation materials such as metal; a USB interface is provided on the side edge of the control board; and an inner electrode sheet 300 is provided on the back of the control board. The functions of the heat sink include: 1) reinforcing the control board; 2) supporting the inner shell to keep it balanced; 3) conducting heat and dissipating heat generated by circuit components during the charging and discharging process; 4) electrically connecting the negative electrode of the control board to the negative electrode of the battery cell.

[0035] The support frame is arranged below the control board and opposite to the back of the control board. A through hole 216 is reserved on the support frame for the inner electrode sheet to pass through. The inner electrode sheet is fixed by the inner electrode sheet welding hole 210 reserved on the control board and / or the inner electrode sheet welding foot 303. The functions of the support frame include: 1) insulation to prevent the circuit components from touching the inner electrode sheet and the positive / negative electrodes of the battery cell; 2) there are potting glue injection holes 208 and potting glue exhaust holes 209 on the support frame. The potting glue injection holes are convenient for glue injection, and the potting glue exhaust holes are used to allow the glue to pass through the potting glue exhaust holes to fill the side wall of the inner shell after the glue is poured; 3) support the control board to prevent the control board from pressing down on the positive electrode cell of the battery.

[0036] The inner shell includes a first side wall that surrounds and wraps the control board and the support frame from the side, and a first top surface that covers the control board from the top and contacts the heat sink. The outer shell includes a second side wall that surrounds and wraps the inner shell from the side, and a second top surface that covers the inner shell from the top and contacts the first top surface. The inner shell and the outer shell cooperate with each other, and the functions of the inner shell include: 1) sealing, enclosing the components inside the shell to facilitate glue injection and prevent glue overflow; 2) serving as a USB protective cover to wrap the USB interface; 3) electrically connecting, connecting the negative electrode of the control board to the negative electrode of the battery cell. The functions of the outer shell include: 1) protecting the entire internal components; 2) connecting the negative electrode of the control board to the negative electrode of the battery cell.

[0037] It can be understood that openings are reserved on the first side wall and the second side wall to expose the USB interface, which is convenient for inserting the USB cable for charging and discharging; at the same time, openings are reserved on the first top surface and the second top surface to expose the positive electrode cap, and because the height of the heat sink is not higher than the height of the positive electrode cap, when the first top surface contacts the heat sink, it does not affect the positive electrode cap from being exposed from the slots of the first top surface and the second top surface.

[0038] Furthermore, the specific shape and number of the heat sink can be flexibly set. The heat sink can be one or more, distributed at the edge of the front of the control board, or distributed in the area on the front of the control board except the positive electrode cap; the heat sink can be any one or more of annular, arc, rectangular.

[0039] Furthermore, the controller 200 also includes a controller cover 107 / 201 made of insulating material. The controller cover is provided with a cover hole, and the cover hole is used to allow the positive electrode cap to pass through. At least one buckle 212 is provided on the inner side wall of the cover hole, and at the same time, a C-shaped slot 211 corresponding to the buckle is provided on the positive electrode cap. When the controller cover is arranged on the second top surface, the positive electrode cap passes through the cover hole and intersects with the buckle and the C-shaped slot, so that the controller cover is connected and fixed to the positive electrode cap, and the two are not easy to fall off. In addition, the controller cover also has a protective function, which can protect the components on the front of the control board.

[0040] On this basis, the controller cover is made of insulating light-conducting material, an LED light 215 is provided on the front of the control board, or an LED light 215 is provided on the back of the control board, and at least one light-transmitting hole is provided on the control board that passes through the front and back of the control board. Through the light-transmitting hole and the light-conducting material of the controller cover, the light of the LED light can be observed by the outside world, which is convenient for users to understand the working status of the controller and the battery.

[0041] Furthermore, the positive electrode cap includes a cap cover and a cap wall formed on the outer periphery of the cap cover, the outer periphery of the cap wall forms a brim, the cap cover, the cap wall and the brim constitute a cylindrical cap body with an open end and an inner cavity; the brim contacts the front of the control board, and some or all of the circuit components on the front of the control board are encapsulated in the inner cavity of the cap body, and a C-shaped slot corresponding to the buckle is provided on the cap wall.

[0042] Furthermore, in one implementation, the support frame includes a base surface, and an annular side wall extending from the base surface for supporting the control board; a through hole for the inner electrode sheet to pass through, and at least one potting glue injection hole 208 are reserved on the base surface; at least one potting glue exhaust hole 209 is reserved on the annular side wall; and a sealing curing glue is filled on the back of the control board, between the annular side wall and the base surface. The sealing curing glue is injected through the injection hole, naturally covers the back of the control board and the components thereon, and fills the inner cavity between the support frame and the back of the control board, and at the same time, fills the inner shell side wall through the potting glue exhaust hole.

[0043] In terms of electrical characteristics, the heat sink is electrically connected to the control board. At the same time, since both the inner shell and the outer shell are directly or indirectly in contact with the heat sink, and all three are conductive materials, the negative electrode of the control board is connected to the negative electrode of the rechargeable battery cell. One end of the inner electrode sheet is electrically connected to the control board, and the other end is used to contact and electrically connect the positive electrode of the battery cell.

[0044] The above is an explanation of the insulating gasket for rechargeable batteries and the rechargeable battery of the present invention, which is used to help understand the present invention; however, the implementation methods of the present invention are not limited to the above embodiments, and any changes, modifications, substitutions, combinations, and simplifications made without departing from the principles of the present invention shall be equivalent replacement methods and shall be included in the protection scope of the present invention.

Claims

1. An insulating gasket for a rechargeable battery, characterized in that: It comprises a gasket body, the diameter of which matches the diameter of a cell of a rechargeable battery; an electrical connection piece window is arranged on the gasket body, and when the insulating gasket is attached to the positive terminal of the cell of the rechargeable battery, the electrical connection piece window is used to expose the positive electrode cap of the rechargeable battery; at least one knife groove is opened on the gasket body, and the knife groove is connected to or not connected to the electrical connection piece window.

2. The insulating gasket for a rechargeable battery according to claim 1, characterized in that: The electrical connection piece window is rectangular and is located near the geometric center of the gasket body; there are two knife grooves, each of which is arc-shaped and forms a nearly circular circle with the geometric center of the gasket body as the center; each knife groove is not connected to the electrical connection piece window.

3. The insulating gasket for a rechargeable battery according to claim 1, characterized in that: The electrical connection piece window is circular, semicircular, rectangular or polygonal, and is located at the geometric center of the gasket body or close to the geometric center.

4. The insulating gasket for a rechargeable battery according to any one of claims 1 to 3, characterized in that: The knife groove is in an arc shape or a straight line shape.

5. A rechargeable battery, characterized in that: It comprises a rechargeable battery cell, a battery controller and an insulating gasket as described in any one of claims 1 to 4; the battery controller is arranged at the positive terminal of the rechargeable battery, and the insulating gasket is arranged between the battery controller and the positive terminal of the rechargeable battery cell.

6. The rechargeable battery according to claim 5, characterized in that The battery controller comprises: A control board, wherein at least one of the front and back sides of the control board is provided with circuit components; a positive electrode cap and a heat sink are provided on the front side of the control board, and the height of the heat sink is not higher than the height of the positive electrode cap; a USB interface is provided on the side edge of the control board; and an inner electrode sheet is provided on the back side of the control board; A support frame, the support frame is arranged below the control board, opposite to the back of the control board and used to support the control board; a through hole is reserved on the support frame for the inner electrode sheet to pass through; A housing, the housing comprising an inner housing and an outer housing; the inner housing comprising a first side wall surrounding the control board and the support frame from the side, and a first top surface covering the control board from above and contacting the heat sink; the outer housing comprising a second side wall surrounding the inner housing from the side, and a second top surface covering the inner housing from above and contacting the first top surface; Among them, the first side wall and the second side wall are reserved with openings to expose the USB interface; the first top surface and the second top surface are reserved with openings to expose the positive electrode cap; the support frame is made of insulating material; the shell, heat sink, positive electrode cap and inner electrode sheet are all made of conductive material.

7. The rechargeable battery according to claim 6, characterized in that The support frame includes a base surface, and an annular side wall extending from the base surface for supporting the control board; a through hole for the inner electrode sheet to pass through, and at least one potting glue injection hole are reserved on the base surface; at least one potting glue exhaust hole is reserved on the annular side wall; and a sealing curing glue is filled on the back of the control board, between the annular side wall and the base surface.

8. The rechargeable battery according to claim 6, characterized in that: It also includes a controller cover made of insulating material; the controller cover has a cover hole, and the inner wall of the cover hole is provided with at least one buckle; the positive electrode cap is provided with a C-shaped slot corresponding to the buckle; The controller cover is arranged on the second top surface, the positive electrode cap passes through the cover hole, and the buckle and the C-shaped slot intersect to connect and fix the controller cover with the positive electrode cap.

9. The rechargeable battery according to claim 8, characterized in that The controller cover is made of insulating light-conducting material; an LED light is arranged on the front of the control board, or an LED light is arranged on the back of the control board, and at least one light-transmitting hole penetrating the front and back of the control board is arranged on the control board.

10. The rechargeable battery according to claim 8, characterized in that The positive electrode cap includes a cap cover and a cap wall formed on the outer periphery of the cap cover, the outer periphery of the cap wall forms a brim, the cap cover, the cap wall and the brim constitute a cylindrical cap body with an open end and an inner cavity; the brim contacts the front side of the control board, and encapsulates part or all of the circuit components on the front side of the control board in the inner cavity of the cap body, and the cap wall is provided with a C-shaped slot corresponding to the buckle.

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