Battery controller and rechargeable battery

Abstract

The utility model discloses a battery controller and a rechargeable battery, and the battery controller mainly comprises a control panel, a support frame and a housing. Wherein a positive electrode cap and a cooling fin are arranged on the front surface of the control panel, and the cooling fin is not higher than the positive electrode cap; the side edge of the control panel is provided with a USB interface; the supporting frame is arranged below the control panel and used for supporting the control panel. A through hole for the inner electrode plate to pass through is reserved in the support frame; the shell comprises an inner shell and an outer shell; the inner shell comprises a first side wall surrounding and wrapping the control panel and the supporting frame from the side, and a first top surface covering the control panel from the upper side and making contact with the cooling fins; the outer shell comprises a second side wall surrounding and wrapping the inner shell from the side and a second top surface covering the inner shell from the upper portion and making contact with the first top surface. According to the technical scheme provided by the utility model, the controller and related structures are improved, so that sufficient heat conduction and heat dissipation can be realized on the premise that the output power is not influenced.

Description

Technical Field

[0001] The utility model relates to the field of rechargeable batteries, in particular to a battery controller and a rechargeable battery. Background Art

[0002] At present, one of the main problems existing in rechargeable battery products is the heat dissipation control problem. Most rechargeable battery products are equipped with a temperature control IC on the controller. When charging and discharging through the USB-C interface of the battery or in other situations, if the internal temperature reaches 100°, the temperature control IC starts to protect itself, reducing the output power to control the temperature, but this makes the functionality and reliability of the product worse, affecting the use effect. Therefore, relying solely on the temperature control IC is difficult to achieve the desired effect. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, a battery controller and a rechargeable battery are proposed. By improving the controller and related structures, heat can be fully conducted to the outer surface of the battery, reducing the internal temperature without affecting the output power, thus achieving the temperature control effect.

[0004] A battery controller, the controller is arranged at the positive extreme of the rechargeable battery and includes:

[0005] A control board, at least one of the front and back surfaces of the control board is provided with circuit components; a positive electrode cap and a heat sink are arranged on the front surface 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 arranged at the side edge of the control board; an inner electrode sheet is arranged on the back surface of the control board;

[0006] A support frame, the support frame is arranged below the control board, opposite to the back surface of the control board and used to support the control board; a through hole for the inner electrode sheet to pass through is reserved on the support frame;

[0007] A housing, the housing includes an inner housing and an outer housing; the inner housing 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 above and contacts the heat sink; the outer housing includes a second side wall that surrounds and wraps the inner housing from the side, and a second top surface that covers the inner housing from above and contacts the first top surface;

[0008] Wherein, openings for exposing the USB interface are reserved on the first side wall and the second side wall; openings for exposing the positive electrode cap are reserved on the first top surface and the second top surface; the support frame is made of insulating material; the housing, the heat sink, the positive electrode cap and the inner electrode sheet are all made of conductive materials.

[0009] A rechargeable battery includes a lithium battery cell and the battery controller as described above; the battery controller is coaxially stacked at the end where the positive electrode of the lithium battery cell is located and is encapsulated with the lithium battery cell into one body.

[0010] For the battery controller and the rechargeable battery provided by the present utility model, the heat sink, the inner housing and the outer housing on the front surface of the control board all have the functions of heat conduction and heat dissipation; at the same time, the heat sink can also reinforce the control board, support the first top surface of the inner housing, and maintain the overall balance after the housing is installed; the controller encloses the control board, circuit components and the support frame and serves as a protective cover for the USB interface, which is convenient for injecting glue and preventing glue overflow; the outer housing has the function of protecting the inner housing, the control board and the support frame. In addition, the heat sink is electrically connected to the control board, the inner housing is in contact with the heat sink, and the outer housing is in contact with the inner housing, and the negative electrode of the control board can be connected to the negative electrode of the battery cell of the rechargeable battery.

[0011] Compared with the prior art, the structure based on the heat sink, the inner housing and the outer housing can fully conduct heat to the outer surface of the rechargeable battery, reduce the internal temperature, and not easily trigger the temperature control IC, thereby achieving the effect of not affecting the output power and performance. Description of the Drawings

[0012] Figure 1 Is a perspective view of the rechargeable battery;

[0013] Figure 2 Is a cross-sectional view of the rechargeable battery;

[0014] Figure 3 Is an exploded view of the rechargeable battery;

[0015] Figure 4 Is a perspective view of the controller;

[0016] Figure 5 Is another perspective view of the controller;

[0017] Figure 6 Is a side view of the controller;

[0018] Figure 7 Is an exploded view of the controller;

[0019] Figure 8 Is a partial enlarged view of the controller;

[0020] Figure 9 Is a cross-sectional view of the controller;

[0021] Figure 10 Is a schematic diagram of the structural decomposition of the control board;

[0022] Figure 11 Is a schematic diagram of the outer shape of the reverse side of the control board;

[0023] Figure 12 Schematic diagram of the front shape of the control board;

[0024] Figure 13 Schematic diagram of the side shape of the control board;

[0025] Figure 14 Cross-sectional view of the controller along the A-A direction;

[0026] The markings in the attached drawings of the specification are as follows:

[0027] 100, rechargeable battery; 101, rechargeable battery cell; 102, insulating gasket; 103, controller support frame; 104, control board; 105, inner controller housing; 106, outer controller housing; 107, controller cover; 108, positive electrode cap; 109, controller annular heat sink; 110, inner controller electrode sheet;

[0028] 200, battery controller; 201, controller cover; 202, outer controller housing; 203, inner controller housing; 204, controller control board; 205, controller support frame; 206, controller positive electrode cap; 207, inner controller electrode sheet; 208, potting glue injection hole; 209, potting glue vent hole; 210, inner electrode sheet welding hole; 211, positive electrode cap card slot; 212, face cover buckle; 213, annular metal sheet; 214, USB isolation sheet; 215, LED indicator light; 216, inner electrode sheet through hole; 217, inner controller housing; 218, USB connector;

[0029] 300, control board; 301, positive electrode cap; 302, annular metal sheet; 303, PCB board; 304, inner electrode sheet; 305, inner electrode sheet welding hole; 306, LED indicator light; 307, positive electrode cap welding part; 308, positive electrode cap card slot; 309, inner electrode sheet welding leg. Detailed implementation manners

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0031] Provide a battery controller and a corresponding rechargeable battery, as Figures 1 to 14 shown, the rechargeable battery includes a lithium battery cell 101 and a battery controller 200; the battery controller is coaxially stacked at the positive electrode end of the lithium battery cell and is encapsulated with the lithium battery cell into one body.

[0032] Specifically, the battery controller mainly includes control boards 104 / 204 / 300, support frames 103 / 205 made of insulating materials, inner shells 105 / 203 / 217 made of conductive materials, and outer shells 106 / 202.

[0033] The control board mainly includes a PCB board 303 and related components. At least one of the front and back sides of the PCB board is provided with circuit components, which include but are not limited to conventional electronic devices such as a main control IC, and will not be elaborated here.

[0034] On the front side of the control board, there are positive electrode caps 108 / 206 / 301 and annular heat sinks 109 / 213 / 302 made of metal conductive materials. The positive electrode caps are fixed through positive electrode cap welding parts 307. The height of the heat sink is not higher than that of the positive electrode cap, and the heat sink is made of heat dissipation materials such as metal. A USB interface is provided at the side edge of the control board. An inner electrode sheet 304 is provided on the back side of the control board. Among them, the functions of the heat sink include: 1) strengthening the control board; 2) supporting the inner shell to keep it balanced; 3) conducting and dissipating the heat generated by the circuit components during charge and discharge; 4) electrical connection, connecting the negative pole of the control board to the negative pole of the battery cell.

[0035] The support frame is arranged below the control board and opposite to the back side of the control board. There are through holes 216 reserved on the support frame for the inner electrode sheet to pass through. The inner electrode sheet is fixed by inner electrode sheet welding holes 210 / 305 and / or inner electrode sheet welding feet 309 reserved on the control board. The functions of the support frame include: 1) insulation, preventing the circuit components from touching the inner electrode sheet and the positive / negative poles 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 facilitate glue injection, and the potting glue exhaust holes are used to allow the glue to fill the side wall of the inner shell through the potting glue exhaust holes after potting; 3) supporting the control board to prevent the control board from pressing down on the positive battery cell.

[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 above 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 above and contacts the first top surface. Among them, the inner shell and the outer shell cooperate. The functions of the inner shell include: 1) sealing, enclosing the components inside the shell, facilitating glue injection and preventing glue overflow; 2) serving as a protective cover for the USB, wrapping the USB interface; 3) electrical connection, connecting the negative pole of the control board to the negative pole of the battery cell. The functions of the outer shell include: 1) protecting all the internal components; 2) connecting the negative pole of the control board to the negative pole of the battery cell.

[0037] Understandably, openings are reserved on the first side wall and the second side wall to expose the USB interface, facilitating the insertion of a 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. Since the height of the heat sink is not higher than that of the positive electrode cap, when the first top surface contacts the heat sink, it does not affect the exposure of the positive electrode cap from the card slots on the first top surface and the second top surface.

[0038] Furthermore, the specific shape and quantity of the heat sinks can be set flexibly. There can be one or more heat sinks, distributed at the edge position on the front side of the control board, or distributed in the area on the front side of the control board except for the positive electrode cap. The heat sinks adopt any one or more of an annular shape, an arc shape, and a rectangular shape.

[0039] Furthermore, the controller 200 further includes a controller cover plate 107 / 201 made of insulating material. The controller cover plate has cover plate holes for the positive electrode cap to pass through. At least one buckle 212 is provided on the inner side wall of the cover plate hole. At the same time, a C-shaped card slot 211 / 308 corresponding to the buckle is provided on the positive electrode cap. When the controller cover plate is arranged above the second top surface, the positive electrode cap passes through the cover plate hole, and the controller cover plate is connected and fixed to the positive electrode cap by the intersection of the buckle and the C-shaped card slot, and the two are not easily detached. In addition, the controller cover plate also has a protective function and can protect the components on the front side of the control board.

[0040] On this basis, the controller cover plate adopts an insulating light guide material. An LED lamp 215 / 306 is arranged on the front side of the control board, or an LED lamp 215 / 306 is arranged on the back side of the control board, and at least one light transmission hole penetrating the front and back sides of the control board is provided on the control board. Through the light transmission hole and the light guide material of the controller cover plate, the light of the LED lamp can be observed by the outside world, facilitating the user to understand the working state of the controller and the battery.

[0041] Furthermore, the positive electrode cap includes a cap body and a cap wall formed on the outer peripheral edge of the cap body. A cap brim is formed on the outer peripheral edge of the cap wall. The cap body, the cap wall, and the cap brim constitute a cylindrical cap body with one end open and having an inner cavity. The cap brim contacts the front side of the control board and encapsulates some or all of the circuit components on the front side of the control board in the inner cavity of the cap body. A C-shaped card slot corresponding to the buckle is provided on the cap wall.

[0042] Further, in one implementation, the support frame includes a base surface and an annular sidewall extending from the base surface for supporting the control board; through holes 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 vent hole 209 is reserved on the annular sidewall; a sealant is filled between the back surface of the control board, the annular sidewall and the base surface. The sealant is injected through the injection hole, naturally covers the back surface of the control board and the components thereon, and fills the inner cavity between the support frame and the back surface of the control board. At the same time, it is filled into the sidewall of the inner housing through the potting glue vent hole.

[0043] In terms of electrical characteristics, the heat sink is electrically connected to the control board. At the same time, since the inner housing and the outer housing are both in direct or indirect 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 battery cell of the rechargeable battery. 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 to the positive electrode of the battery cell.

[0044] Further, an insulating gasket 102 is provided between the controller and the positive electrode end of the lithium battery cell.

[0045] The above is an elaboration of the battery controller and rechargeable battery of the present invention to help understand the present invention; however, the implementation manners of the present invention are not limited by the above embodiments. Any changes, modifications, substitutions, combinations, and simplifications made without departing from the principle of the present invention shall be equivalent replacement manners and are all included in the protection scope of the present invention.

Claims

1. A battery controller, characterized in that: The controller is arranged at the positive terminal of the rechargeable battery and 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.

2. The battery controller according to claim 1, characterized in that: There are one or more heat sinks; the heat sinks are distributed at the edge of the front side of the control board, or the heat sinks are distributed in the area on the front side of the control board except the positive electrode cap.

3. The battery controller according to claim 1, characterized in that: The heat sink is in any one or more of annular, arc-shaped, and rectangular shapes.

4. The battery controller according to claim 1, 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.

5. The battery controller according to claim 4, 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.

6. The battery controller according to claim 4, 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.

7. The battery controller according to claim 1, 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 battery controller according to any one of claims 1 to 7, characterized in that: The heat sink is electrically connected to the control board, and the negative electrode of the control board is connected to the negative electrode of the battery cell of the rechargeable battery.

9. A rechargeable battery, characterized in that: It comprises a lithium battery cell and a battery controller as claimed in any one of claims 1 to 8; the battery controller is coaxially stacked at the end where the positive electrode of the lithium battery cell is located, and is packaged as a whole with the lithium battery cell.

10. The rechargeable battery according to claim 9, characterized in that An insulating gasket is arranged between the battery controller and the end where the positive electrode of the lithium battery cell is located.

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