Lithium battery with protection plate

Abstract

The utility model discloses a lithium battery with a protection plate. The lithium battery comprises a shell, a battery body, a protection plate assembly and a buffer assembly, the shell is provided with a cavity; the protection plate assembly comprises a PCB, a switch module and a temperature sensor, the switch module is arranged on the PCB, and the temperature sensor is arranged on the battery body; the buffering assembly comprises an annular buffering sleeve and buffering pieces, the buffering sleeve is arranged on the outer side of the battery body in a sleeving mode, the buffering pieces are arranged corresponding to the four corners of the upper end and the lower end of the battery body, and the outer walls of the buffering pieces make contact with the inner wall of the cavity; thus, through the design of each component, the PCB is controlled to cut off or conduct the connection between the battery body and a load or a charging power supply by utilizing the feedback of the temperature sensor, so that the short circuit phenomenon caused by overheating of the battery body is prevented, the influence of external collision on the battery body is reduced in cooperation with the arrangement of the buffer assembly, the use stability of the battery body is ensured, and the service life of the battery body is prolonged. The use safety of the lithium battery is improved, the usability is good, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field technology of lithium battery especially is a lithium battery with protection board. BACKGROUND

[0002] With the development of science and technology, lithium battery has energy density high, smaller, super thin, light weight, and high safety and low cost and many obvious advantages, it can be widely used in mobile electric appliances such as mobile phones and palm computers, and lithium battery becomes increasingly prominent energy power owing to its small size, large capacity, large specific energy and no memory and many other outstanding characteristics.

[0003] And because lithium battery cannot be used alone, it is necessary to design corresponding protection device for lithium battery, generally, the reliability of lithium battery protection device can determine the safety and service life of the battery to a great extent, most of the existing lithium battery protection devices adopt protection board with charge and discharge protection function, but the buffering protection effect of lithium battery on the shell is not good, when the shell is subjected to external impact, the lithium battery in the shell is prone to damage or unstable use, and in serious cases, battery pack heating out of control and fire explosion accidents occur, thereby endangering the life safety of users, the safety is poor, and the application range is small.

[0004] Therefore, it is necessary to study a new technical scheme to solve the above problems. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a lithium battery with protection board, which utilizes the feedback of temperature sensor to control the connection between PCB board and load or charging power supply, prevents the short circuit phenomenon of battery body caused by overheating, and sets buffering component to reduce the influence of external impact on battery body, ensures the use stability of battery body, improves the use safety of lithium battery, has good usability, and has wide application range.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] The application discloses a lithium battery with a protection plate, which comprises a shell, a battery body, a protection plate assembly and a buffer assembly; wherein: the inside of the shell is provided with a cavity, the battery body, the protection plate assembly and the buffer assembly are all arranged on the cavity; the protection plate assembly is arranged at the upper end of the battery body, the protection plate assembly comprises a PCB board, a switch module and a temperature sensor, the switch module is arranged on the PCB board and is used for cutting off or conducting a circuit according to the instruction of the PCB board, and the temperature sensor is arranged on the upper surface of the battery body; the buffer assembly comprises a buffer sleeve and a buffer piece, the buffer sleeve is annular, the buffer sleeve is sleeved outside the battery body, and the buffer piece is arranged at the four corners of the upper and lower ends of the battery body; and the outer wall of the buffer piece is in contact with the inner wall of the cavity.

[0008] As a preferred solution, the buffer sleeve and the buffer piece are both organic silicone glue.

[0009] As a preferred solution, the inside of the buffer sleeve is provided with a heat sink.

[0010] As a preferred solution, the heat sink is a graphene heat sink.

[0011] As a preferred solution, the inner side surface of the buffer sleeve is provided with anti-skid lines for being in contact with the battery body.

[0012] As a preferred solution, the cavity is provided with a fire-retardant material, and the fire-retardant material is arranged between the buffer sleeve, the buffer piece and the inner wall of the cavity.

[0013] As a preferred solution, the fire-retardant material is fire-retardant cotton.

[0014] As a preferred solution, the upper section of the cavity is provided with a mounting step, the PCB board is arranged on the mounting step through a mounting frame, one of the mounting frame and the mounting step is provided with a positioning part, and the other is provided with a positioning groove, the positioning part is matched on the positioning groove, so that the mounting frame is positioned and connected on the mounting step.

[0015] As a preferred solution, the outer surface of the shell is sequentially provided with a heat dissipation layer, a corrosion-resistant layer and a wear-resistant layer from inside to outside.

[0016] As a preferred solution, the heat dissipation layer is a graphene heat dissipation coating, the corrosion-resistant layer is an epoxy resin layer, and the wear-resistant layer is a polytetrafluoroethylene coating.

[0017] The utility model discloses have obvious advantages and beneficial effects compared with prior art, specifically speaking, from the above technical scheme can know, it mainly is through the design of each component, utilizes the feedback of temperature sensor to control the connection of PCB board cut -off or on -off battery body and load or charging power supply, prevents the short circuit phenomenon of battery body overheat, cooperates the setting of buffer assembly to reduce the influence when battery body is impacted by outside, guarantees the use stability of battery body, improves the use security of lithium battery, and the simple structure design is ingenious and reasonable, and the usability is good, and the scope of application is wide.

[0018] Secondly, the setting of the cooling fin is favorable to improve the quick dissipation of the heat generated by the battery body, thereby guaranteeing the normal use of the lithium battery, and simultaneously, the setting of the anti-skid line is favorable to guarantee the connection firmness between the buffer sleeve and the battery body, and the setting of the flame-retardant material is favorable to avoid the problem of fire after the battery body short-circuit heating, thereby improving the use security of the lithium battery and being high in practicality.

[0019] And the setting of the positioning part and the positioning groove is favorable to the assembly connection of the mounting frame on the shell, and simultaneously, the setting of the heat dissipation layer, the corrosion-resistant layer and the wear-resistant layer makes the shell have better heat dissipation, corrosion resistance and wear resistance, thereby improving the service life of the shell.

[0020] In order to make the structure features and functions of the utility model clearer, the utility model will be described in detail below by combining the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the sectional view of the embodiment of the utility model;

[0022] Figure 2 is Figure 1 the local enlarged schematic view of the position A shown in the figure;

[0023] Figure 3 is the local schematic view of the shell of the embodiment of the utility model.

[0024] BRIEF DESCRIPTION OF DRAWINGS:

[0025] 10, shell 11, chamber

[0026] 12, mounting step 121, positioning groove

[0027] 13, heat dissipation layer 14, corrosion-resistant layer

[0028] 15, wear-resistant layer 20, battery body

[0029] 30, protection plate assembly 31, PCB board

[0030] 32, temperature sensor 33, mounting frame

[0031] 331、positioning portion 40, buffer assembly

[0032] 41、buffer sleeve 411, heat sink

[0033] 42、buffer 43, flame retardant material. DETAILED DESCRIPTION

[0034] Please refer to Figures 1 to 3 The specific structure of the embodiment of the utility model is shown.

[0035] A lithium battery with a protection plate comprises a shell 10, a battery body 20, a protection plate assembly 30 and a buffer assembly 40; wherein:

[0036] The inside of the shell 10 is provided with a cavity 11, the battery body 20, the protection plate assembly 30 and the buffer assembly 40 are all arranged on the cavity 11; the protection plate assembly 30 is arranged at the upper end of the battery body 20, the protection plate assembly 30 comprises a PCB board 31, a switch module (not shown in the figure) and a temperature sensor 32, the switch module is arranged on the PCB board 31, so as to cut off or conduct the circuit according to the instruction of the PCB board, the temperature sensor 32 is arranged on the upper surface of the battery body 10; the buffer assembly 40 comprises a buffer sleeve 41 and a buffer 42, the buffer sleeve 41 is annular, the buffer sleeve 41 is sleeved on the outside of the battery body 20, the buffer 42 is arranged at the four corners of the upper and lower ends of the battery body 20, the outer wall of the buffer 42 is in contact with the inner wall of the cavity 11; preferably, the buffer sleeve 41 and the buffer 42 are both organic silica gel, thus, through the design of each component, the connection of the battery body and the load or the charging power supply is controlled by the feedback of the temperature sensor, so as to prevent the short circuit phenomenon caused by the overheating of the battery body, the setting of the buffer assembly is matched, so as to reduce the influence of the battery body when it is subjected to external impact, the use stability of the battery body is ensured, the use safety of the lithium battery is improved, the structure design is simple, ingenious and reasonable, the usability is good, and the application range is wide.

[0037] In addition, the inside of the buffer sleeve 41 is provided with a heat sink 411, the heat sink 411 is a graphene heat sink, thus, the setting of the heat sink is beneficial to improving the rapid dissipation of the heat generated by the battery body, so as to ensure the normal use of the lithium battery.

[0038] Preferably, the inner side of the buffer sleeve 41 is provided with anti-skid lines (not shown in the figure) for contacting the battery body, and the cavity 11 is provided with a fire-retardant material 43 arranged between the buffer sleeve 41, the buffer 42 and the inner wall of the cavity 11, and the fire-retardant material 43 is fire-retardant cotton, so that the anti-skid lines are arranged to ensure the firmness of the connection between the buffer sleeve and the battery body, and the fire-retardant material is arranged to avoid the problem of fire after the battery body is short-circuited and heated, thereby improving the use safety of the lithium battery and having strong practicality.

[0039] Furthermore, the upper section of the cavity 11 is provided with a mounting step 12, the PCB board 31 is arranged on the mounting step 12 through a mounting frame 33, one of the mounting frame 33 and the mounting step 12 is provided with a positioning part 331, and the other is provided with a positioning groove 121, the positioning part 331 is adapted to the positioning groove 121 to realize the positioning connection of the mounting frame 33 on the mounting step 12, preferably, the mounting frame 33 is provided with the positioning part 331, and the mounting step 12 is provided with the positioning groove 121, so that the positioning part and the positioning groove are arranged to facilitate the assembly connection of the mounting frame on the shell.

[0040] Preferably, the outer surface of the shell 10 is sequentially provided with a heat dissipation layer 13, a corrosion-resistant layer 14 and a wear-resistant layer 15 from inside to outside, the heat dissipation layer 13 is a graphene heat dissipation coating, the corrosion-resistant layer 14 is an epoxy resin layer, and the wear-resistant layer 15 is a polytetrafluoroethylene coating, so that the shell has better heat dissipation, corrosion resistance and wear resistance, thereby prolonging the service life of the shell.

[0041] The design focus of the utility model lies in that it mainly controls the connection of the battery body and the load or the charging power supply by the feedback of the temperature sensor through the design of various components, so as to prevent the short circuit phenomenon of the battery body caused by overheating, and cooperates with the arrangement of the buffer assembly to reduce the influence of the battery body when being collided by the outside world, thereby guaranteeing the use stability of the battery body, improving the use safety of the lithium battery, and having simple structure design, good cleverness and reasonableness, good usability and wide application range.

[0042] Secondly, the arrangement of the heat dissipation fins is favorable for improving the rapid dissipation of the heat generated by the battery body, thereby guaranteeing the normal use of the lithium battery, and the arrangement of the anti-skid lines is favorable for guaranteeing the firmness of the connection between the buffer sleeve and the battery body, and the arrangement of the fire-retardant material is favorable for avoiding the problem of fire after the battery body is short-circuited and heated, thereby improving the use safety of the lithium battery and having strong practicality.

[0043] And, the setting of the positioning part and the positioning groove is favorable for the assembly connection of the mounting frame on the shell, and the setting of the heat dissipation layer, the corrosion-resistant layer and the wear-resistant layer makes the shell have better heat dissipation, corrosion resistance and wear resistance, thereby prolonging the service life of the shell.

[0044] The above merely describes preferred embodiments of the present application, and is not intended to limit the technical scope of the present application in any way. Any slight modification, equivalent change and modification made according to the technical essence of the present application shall still fall within the technical scope of the present application.

Claims

1. A lithium battery having a protective plate, characterized by: The application relates to a battery protection device, which comprises a shell, a battery body, a protection plate assembly and a buffer assembly; wherein the inside of the shell is provided with a cavity, the battery body, the protection plate assembly and the buffer assembly are arranged on the cavity; the protection plate assembly is arranged at the upper end of the battery body; the protection plate assembly comprises a PCB board, a switch module and a temperature sensor; the switch module is arranged on the PCB board and is used for cutting off or conducting a circuit according to the instruction of the PCB board; the temperature sensor is arranged on the upper surface of the battery body; the buffer assembly comprises a buffer sleeve and a buffer piece; the buffer sleeve is annular; the buffer sleeve is sleeved outside the battery body; the buffer piece is arranged at the four corners of the upper and lower ends of the battery body; the outer wall of the buffer piece is in contact with the inner wall of the cavity.

2. The lithium battery with a protection plate according to claim 1, characterized in that: The buffer sleeve and the buffer piece are both organic silicone glue.

3. The lithium battery with a protection plate according to claim 1, wherein: The inside of the buffer sleeve is provided with a heat dissipation fin.

4. The lithium battery with a protection plate according to claim 3, characterized in that: The heat dissipation fin is a graphene heat dissipation fin.

5. The lithium battery with a protection plate according to claim 1, wherein: The inner side surface of the buffer sleeve is provided with anti-skid lines for being in contact with the battery body.

6. The lithium battery with a protection plate according to claim 1, wherein: Flame-retardant material is arranged in the cavity and between the buffer sleeve, the buffer piece and the inner wall of the cavity.

7. The lithium battery with a protection plate according to claim 6, characterized in that: The flame-retardant material is flame-retardant cotton.

8. The lithium battery with a protection plate according to claim 1, wherein: An installation step is arranged at the upper section of the cavity; the PCB board is arranged on the installation step through a mounting frame; one of the mounting frame and the installation step is provided with a positioning part, and the other is provided with a positioning groove; the positioning part is matched on the positioning groove to realize the positioning connection of the mounting frame on the installation step.

9. The lithium battery with a protection plate according to claim 1, characterized in that: The outer surface of the shell is sequentially provided with a heat dissipation layer, a corrosion-resistant layer and a wear-resistant layer from inside to outside.

10. The lithium battery with a protection plate according to claim 9, characterized in that: The heat dissipation layer is a graphene heat dissipation coating layer; the corrosion-resistant layer is an epoxy resin layer; and the wear-resistant layer is a polytetrafluoroethylene coating layer.

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