CN216354642U

CN216354642U - Battery overheat protection device

Info

Publication number: CN216354642U
Application number: CN202123175200.5U
Authority: CN
Inventors: 刘敏辉
Original assignee: Shoufu Lithium Battery Technology Jiangsu Co ltd
Current assignee: Shoufu Lithium Battery Technology Jiangsu Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-04-19
Anticipated expiration: 2031-12-16

Abstract

The utility model provides a battery overheating protection device, and relates to the technical field of overheating protection devices. The battery overheating protection device comprises a battery, wherein a screw is fixedly connected to the front portion of the battery, a battery stud is fixedly connected to the rear portion of the battery, a PCB connecting plate is arranged between the front portion and the rear portion of the battery, a battery cavity is formed in the battery stud, and a conductive connecting piece is arranged in the battery cavity. This battery overheat protection device establishes the PCB connecting plate through the connecting portion outside cover that sets up in the screw front portion, through the outer fishplate bar that sets up, makes PCB connecting plate board between outer fishplate bar and battery double-screw bolt, through increasing the PCB connecting plate in the middle of the battery to realize that the series-parallel connection is fixed to constitute the battery module, increase module total voltage and total capacity, this PCB connecting plate can realize single electric core overcurrent protection function, overcurrent does not locally generate heat when being connected in order to realize screw and battery double-screw bolt.

Description

Battery overheat protection device

Technical Field

The utility model relates to a motor technology, in particular to a battery overheating protection device, and belongs to the technical field of overheating protection devices.

Background

Battery (Battery) refers to a device that can convert chemical energy into electrical energy, having a positive electrode and a negative electrode, in a partial space of a cup, tank or other container or composite container that contains an electrolyte solution and metal electrodes to generate an electric current. With the advancement of technology, batteries generally refer to small devices, such as solar cells, that can generate electrical energy. The battery has the advantages of simple structure, convenient carrying, simple and easy charging and discharging operation, stable and reliable performance and great effect in various aspects of modern social life.

The existing battery overheating protection device has few collected temperature points, is insensitive to reaction, cannot respond quickly when the temperature rises, and has delay in reaction. The local overhigh temperature can not be sensed sometimes, has potential risks, can not be recycled, and simultaneously needs other auxiliary control circuits.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The present invention is directed to provide a battery overheat protection device to solve the above problems, and to overcome the disadvantages of the existing battery overheat protection device in the prior art, such as less temperature points collected, insensitive response, and delayed response due to the increased temperature. The local over-temperature can not be sensed sometimes, so that the potential risk exists, the recyclable use can not be carried out, and other auxiliary control circuits are needed.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme: the battery overheating protection device comprises a battery, wherein a screw is fixedly connected to the front portion of the battery, a battery stud is fixedly connected to the rear portion of the battery, a PCB connecting plate is arranged between the front portion and the rear portion of the battery, a battery cavity is formed in the battery stud, a conductive connecting piece is arranged in the battery cavity, and an insulating sealing piece is arranged in the conductive connecting piece formed by the battery stud.

Preferably, the screw includes outer fishplate bar, outer fishplate bar front end is provided with connecting portion, the external screw thread has been seted up in the connecting portion outside, and connecting portion and outer fishplate bar can adopt integrated into one piece, are convenient for be connected with the battery double-screw bolt.

Preferably, the middle part of the PCB connecting plate is provided with a connecting groove, the connecting groove is matched with the connecting part at the front end of the screw (2), the PCB connecting plate is arranged between the screw and the battery stud, so that the battery module can be fixedly formed by series-parallel connection, the total voltage and the total capacity of the module can be increased, the PCB connecting plate can realize the overcurrent protection function of a single electric core, and overcurrent does not locally generate heat when the screw is connected with the battery stud.

Preferably, an inner connecting piece is arranged inside the battery stud, an internal thread is formed in the inner wall of the inner connecting piece, the connecting portion extends into the inner connecting piece arranged on the battery stud, and the inner connecting piece is matched with the connecting portion arranged at the front end of the screw, so that the screw and the battery stud can be connected in a threaded mode.

Preferably, the insulating sealing element is matched with the inner wall of the battery cavity formed by the battery stud, the insulating sealing element is made of a rubber material, insulation is facilitated, and meanwhile sealing treatment is performed on the battery cavity formed by the battery stud.

Preferably, the conductive connecting piece comprises a first contact part and a second contact part, the first contact part is arranged in the battery cavity, the first contact part is arranged between the bottom of the internal connecting piece and the bottom of the battery stud, and the second contact part is arranged between the internal connecting piece and the side wall of the battery cavity formed by the battery stud, so that the conductive connecting piece, the screw and the battery stud can be fully contacted.

Preferably, the conductive connecting piece is made of a thermosensitive conductive material in a grease state, and the battery is in a normal conduction state. When the battery module is in use, the temperature of the battery rises and exceeds the allowable use temperature of the battery, the conductive connecting piece is heated to be in a gaseous state as the conductive connecting piece in the state shown in fig. 5 and is dispersed in a battery cavity formed by the battery stud, and the gaseous state is difficult to conduct and is resistant to high-voltage breakdown.

The utility model provides a battery overheating protection device, which has the following beneficial effects:

1. this battery overheat protection device establishes the PCB connecting plate through the connecting portion outside cover that sets up in the screw front portion, through the outer fishplate bar that sets up, makes PCB connecting plate board between outer fishplate bar and battery double-screw bolt, through increasing the PCB connecting plate in the middle of the battery to realize that the series-parallel connection is fixed to constitute the battery module, increase module total voltage and total capacity, this PCB connecting plate can realize single electric core overcurrent protection function, overcurrent does not locally generate heat when being connected in order to realize screw and battery double-screw bolt.

2. This battery overheat protection device, in the battery module use, the battery temperature risees, the allowable service temperature of battery has been exceeded, electrically conductive connecting piece is heated and becomes the gaseous state like the electrically conductive connecting piece state in figure 5, it spreads in the battery cavity that the battery double-screw bolt was seted up, this kind of gaseous state is difficult electrically conductive, and high-pressure resistant breakdown, therefore the electrically conductive route of battery is cut off temporarily, the battery is in the state of opening a circuit, prevent that the battery temperature is too high, play the guard action to the battery, realize automatically that the connection and the disconnection of battery circuit, circulated use, need not change, moreover, the steam generator is simple in structure, do not need supplementary control circuit.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the utility model in a normal on state;

FIG. 3 is an enlarged view of the portion B of FIG. 2 according to the present invention;

FIG. 4 is a schematic structural view of an overheat protection shutdown state according to the present invention;

fig. 5 is an enlarged view of the structure of the portion a in fig. 4 according to the present invention.

In the figure: 1. a battery; 2. a screw; 201. an outer connecting plate; 202. a connecting portion; 3. a battery stud; 301. an inner connecting piece; 4. a battery cavity; 5. a conductive connection member; 501. a first contact portion; 502. a second contact portion; 6. an insulating seal; 7. a PCB connecting plate; 701. and connecting the grooves.

Detailed Description

The embodiment of the utility model provides a battery overheating protection device.

Referring to fig. 1, 2, 3, 4 and 5, the battery module comprises a battery 1, a screw 2 is fixedly connected to the front of the battery 1, the screw 2 comprises an external connection plate 201, a connection part 202 is arranged at the front end of the external connection plate 201, external threads are arranged on the outer side of the connection part 202 to facilitate connection with a battery stud 3, a battery stud 3 is fixedly connected to the rear of the battery 1, a PCB connection plate 7 is arranged between the front and rear of the two batteries 1, a connection groove 701 is arranged in the middle of the PCB connection plate 7, the connection groove 701 is matched with the connection part 202 at the front end of the screw 2, the PCB connection plate 7 is arranged between the screw 2 and the battery stud 3 to facilitate connection and parallel connection to form a battery 1 module, increase the total voltage and the total capacity of the module, the PCB connection plate 7 can realize the overcurrent protection function of a single battery cell, in order to realize that overcurrent does not locally generate heat when the screw 2 is connected with the battery stud 3, a battery cavity 4 is formed in the battery stud 3, a conductive connecting piece 5 is arranged in the battery cavity 4, and an insulating sealing piece 6 is arranged in the conductive connecting piece 5 formed in the battery stud 3.

Specifically, when making up two 1 front portions of battery and rear portion, establish PCB connecting plate 7 through the connecting portion 202 outside cover that sets up in 2 front portions of screw, through the external connecting plate 201 that sets up, make PCB connecting plate 7 block between external connecting plate 201 and battery double-screw bolt 3, through increase PCB connecting plate 7 in the middle of battery 1, in order to realize the fixed battery 1 module of constituteing of series-parallel connection, increase module total voltage and total capacity, this PCB connecting plate 7 can realize single electric core overcurrent protection function, overcurrent does not locally generate heat when being connected in order to realize screw 2 and battery double-screw bolt 3.

Referring to fig. 1, 2, 4 and 5 again, an inner connector 301 is disposed inside the battery stud 3, an inner thread is disposed on an inner wall of the inner connector 301, the connection portion 202 extends into the inner connector 301 disposed on the battery stud 3, the inner connector 301 is adapted to the connection portion 202 disposed at the front end of the screw 2, so as to facilitate the screw connection between the screw 2 and the battery stud 3, an insulating sealing member 6 is adapted to an inner wall of a battery cavity 4 disposed on the battery stud 3, the insulating sealing member 6 is made of a rubber material, so as to facilitate insulation, and simultaneously seal the battery cavity 4 disposed on the battery stud 3, the conductive connecting member 5 includes a first contact portion 501 and a second contact portion 502, the first contact portion 501 is disposed inside the battery cavity 4, the first contact portion 501 is disposed between a bottom of the inner connector 301 and an inner bottom end of the battery stud 3, the second contact portion 502 is disposed between the inner connector 301 and a side wall of the battery cavity 4 disposed on the battery stud 3, the conductive connecting piece 5 is in full contact with the screw 2 and the battery stud 3, and the conductive connecting piece 5 is made of a heat-sensitive conductive material in a grease state.

Specifically, be provided with conductive connecting piece 5 simultaneously in the inside battery cavity 4 that offers of battery stud 3 inside, be equipped with insulating seal 6 in battery cavity 4 inside, seal battery cavity 4 through insulating seal 6 to guarantee that battery cavity 4 carries out encapsulated situation, conductive connecting piece 5 adopts the temperature sensing conducting material of grease state simultaneously, and battery 1 is in normal conducting state. When the battery 1 is used in a module, the temperature of the battery 1 rises and exceeds the allowable use temperature of the battery 1, which is generally set to 65 ℃, the conductive connecting piece 5 is heated to become gaseous, such as the state of the conductive connecting piece 5 in fig. 5, and the gaseous state is dispersed in the battery cavity 4 formed by the battery stud 3, is difficult to conduct, and is resistant to high-voltage breakdown, so that the conductive path of the battery 1 is temporarily cut off, the battery 1 is in an open circuit state, the temperature of the battery 1 is prevented from being too high, and the battery 1 is protected.

When the temperature of the battery is reduced, the thermosensitive conducting material is condensed and changed into a grease state, the current passes through the screw 2, the thermosensitive conducting material grease state of the conducting connecting piece 5 is changed into the state of the conducting connecting piece 5 in the figure 3, the battery stud 3 is conducted again, the battery is restored to a normal conduction use state, if each battery 1 is connected by the anti-overheating device, each battery 1 can be protected, and the overall safety level of the battery 1 module is improved.

Through the adjustment of the components of the thermosensitive conducting material, the thermosensitive conducting material can be converted into a gaseous phase change point from a grease state at different temperatures, so that different temperature control requirements are met, and the thermosensitive conducting material can resist high-voltage breakdown (at least 600V) when being in a gaseous state.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A battery overheat protection device comprising a battery (1), characterized in that: the battery is characterized in that a screw (2) is fixedly connected to the front portion of the battery (1), a battery stud (3) is fixedly connected to the rear portion of the battery (1), a PCB connecting plate (7) is arranged between the front portion and the rear portion of the battery (1), a battery cavity (4) is formed inside the battery stud (3), a conductive connecting piece (5) is arranged inside the battery cavity (4), and an insulating sealing piece (6) is arranged inside the conductive connecting piece (5) formed by the battery stud (3).

2. A battery overheat protection apparatus as claimed in claim 1, wherein: the screw (2) comprises an outer connecting plate (201), a connecting portion (202) is arranged at the front end of the outer connecting plate (201), and external threads are formed in the outer side of the connecting portion (202).

3. A battery overheat protection apparatus as claimed in claim 1, wherein: connecting groove (701) have been seted up in PCB connecting plate (7) middle part, connecting groove (701) and screw (2) front end connecting portion (202) looks adaptation, PCB connecting plate (7) set up between screw (2) and battery double-screw bolt (3).

4. A battery overheat protection apparatus as claimed in claim 3, wherein: the battery stud is characterized in that an inner connecting piece (301) is arranged inside the battery stud (3), an internal thread is formed in the inner wall of the inner connecting piece (301), the connecting portion (202) extends to the inside of the inner connecting piece (301) arranged on the battery stud (3), and the inner connecting piece (301) is matched with the connecting portion (202) arranged at the front end of the screw (2).

5. A battery overheat protection apparatus as claimed in claim 1, wherein: the insulating sealing element (6) is matched with the inner wall of a battery cavity (4) formed in the battery stud (3), and the insulating sealing element (6) is made of rubber materials.

6. A battery overheat protection apparatus as claimed in claim 1, wherein: the conductive connecting piece (5) comprises a first contact part (501) and a second contact part (502), the first contact part (501) is arranged inside the battery cavity (4), the first contact part (501) is arranged between the bottom of the inner connecting piece (301) and the bottom of the inner battery stud (3), and the second contact part (502) is arranged between the side walls of the battery cavity (4) formed by the inner connecting piece (301) and the battery stud (3).

7. A battery overheat protection apparatus as claimed in claim 1, wherein: the conductive connecting piece (5) is made of a heat-sensitive conductive material in a grease state.