CN214753945U

CN214753945U - Over-temperature and over-current dual protection device for lithium battery pack

Info

Publication number: CN214753945U
Application number: CN202120926166.1U
Authority: CN
Inventors: 戴汉齐; 黄波
Original assignee: Guangdong Lian Ding Detection Technology Co ltd
Current assignee: Guangdong Lian Ding Detection Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-16
Anticipated expiration: 2031-04-30

Abstract

The utility model discloses an over-temperature and over-current double protection device of a lithium battery pack, which comprises a lithium battery protection box, a protective box cover is movably arranged on one side of the outer surface of the lithium battery protective box, a lithium battery protective plate device is arranged on one side of the inner wall of the protective box cover, the number of the lithium battery protection plate devices is four, the four lithium battery protection plate devices all comprise protection plate connectors, limiting plates A, through openings A, limiting plates B, protection plate connecting wires, springs, spring grooves, through openings B, protection plate main connectors, protection plates, mounting grooves and protection plate connectors, a spring is arranged in the spring groove, a limiting plate A is fixedly arranged on the lower end face of the spring, a protective plate connector is fixedly arranged in the middle of the lower end face of the limiting plate A, the outside of protection shield connector is equipped with opening A, opening A extends to the inside in spring groove. The utility model discloses a flexibility when lithium battery protection shield device has improved the installation protection shield greatly.

Description

Over-temperature and over-current dual protection device for lithium battery pack

Technical Field

The utility model relates to a protection device technical field specifically is a lithium cell group excess temperature overflows duplicate protection device.

Background

With the rapid development of socio-economy, lithium batteries can be roughly classified into two types: lithium metal batteries and lithium ion batteries, the lithium ion batteries do not contain metallic lithium and can be charged, the fifth generation products of rechargeable batteries, namely the lithium metal batteries, are produced in 1996, the safety, the specific capacity, the self-discharge rate and the cost performance ratio of the rechargeable batteries are all superior to those of the lithium ion batteries, and only a few national companies produce the lithium metal batteries due to the high technical requirement limit of the rechargeable batteries.

However, the conventional over-temperature and over-current double protection device for the lithium battery generally adopts a circuit board mounting mode to achieve the over-temperature and over-current protection effect, but the circuit board is complex to mount and cannot be randomly dismounted after being mounted; therefore, the existing requirements are not met, and a lithium battery pack over-temperature and over-current dual protection device is provided for the existing requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium cell group excess temperature overflows duplicate protection device to it is loaded down with trivial details to solve the circuit board installation that proposes in the above-mentioned background art, and can not demolish the scheduling problem at will after the installation.

In order to achieve the above object, the utility model provides a following technical scheme: a lithium battery pack over-temperature and over-current dual protection device comprises a lithium battery protection box, wherein a protection box cover is movably arranged on one side of the outer surface of the lithium battery protection box, a lithium battery protection board device is arranged on one side of the inner wall of the protection box cover, the number of the lithium battery protection board devices is four, four lithium battery protection board devices respectively comprise a protection board connector, a limiting board A, a limiting board B, a protection board connecting line, a spring groove, an opening B, a protection board general connector, a protection board, a mounting groove and a protection board connector, the spring is arranged inside the spring groove, the lower end face of the spring is fixedly provided with the limiting board A, the middle position of the lower end face of the limiting board A is fixedly provided with the protection board connector, the outer side of the protection board connector is provided with the opening A, the opening A extends to the inside of the spring groove, the upper end face of the spring is fixedly provided with the limiting board B, the fixed opening B that is equipped with in limiting plate B's top, the inside of protection case lid is equipped with the mounting groove, opening B extends to the inside of mounting groove, the inside of spring is equipped with the protection shield connecting wire, the vertical limiting plate A that runs through in bottom of protection shield connecting wire passes through welded fastening with the protection shield connector and is connected, the other end of protection shield connecting wire runs through the inside that limiting plate B extends to the mounting groove through opening B, four the other end of protection shield connecting wire all with the one end fixed connection of protection shield general connector, the other end of protection shield general connector is located the inside of protection shield connector, the protection shield connector is located one side of protection shield surface.

Preferably, the inside of lithium battery protection case is equipped with the standing groove, the quantity of standing groove is four, four the even distribution of standing groove is in the inside of lithium battery protection case, the inside of standing groove is equipped with the lithium cell, the surface of lithium cell is laminated closely with the inner wall of standing groove, the position that the up end of lithium cell is close to both sides is all fixed and is equipped with the lithium cell connector.

Preferably, fixed mounting has total connector on the surface of lithium battery protection case, total connector and four lithium battery connector on the lithium cell passes through the power connecting wire and connects.

Preferably, the protection box cover is movably connected with the lithium battery protection box through a rotating shaft.

Preferably, the positions of the lithium battery protection plate devices correspond to the lithium battery connectors on the outer side of the upper end face of the lithium battery.

Preferably, the bottom surface of the limiting plate A is larger than the through opening A, and the upper end surface of the limiting plate B is larger than the through opening B.

Preferably, the outer surface of the protective plate general connector is closely attached to the inner wall of the protective plate connecting port, and the protective plate is fixedly mounted on the inner wall of the mounting groove.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a place the lithium cell into the inside of standing groove, close the protection case lid through the pivot, after the protection case lid is covered completely, the protection shield connector can be connected with the lithium cell connector, when the protection shield connector is connected with the lithium cell connector, the lithium cell can produce electric connection through protection shield connecting wire and protection shield, can carry out the excessive temperature and overflow dual protection to the lithium cell through the protection shield, when needs and protection shield disconnection time only need open the protection case lid can, after the protection case lid is opened, the connection of protection shield connector and lithium cell connector can break off, through the lithium cell protection shield device greatly improved the flexibility when installing the protection shield;

2. the utility model discloses a protection shield, protection shield general connector and protection shield connecting wire all are in the inside of protection case lid, can protect protection shield, protection shield general connector and protection shield connecting wire through the protection case lid, and can let protection shield, protection shield general connector and protection shield connecting wire exempt from to receive external disturbance, have improved lithium battery protection shield device's life greatly.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is a schematic diagram of the internal structure of FIG. 1 at A according to the present invention;

fig. 3 is the internal structure diagram of the whole middle protective box cover of the utility model.

In the figure: 1. a lithium battery protection box; 2. a placement groove; 3. a lithium battery; 4. a lithium battery connector; 5. a main connector; 6. a protective box cover; 7. a lithium battery protection board device; 8. a protection plate connector; 9. a limiting plate A; 10. a through opening A; 11. a limiting plate B; 12. a protection board connecting line; 13. a spring; 14. a spring slot; 15. a through opening B; 16. a protective plate general connector; 17. a protection plate; 18. mounting grooves; 19. and a protection board connecting port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

The lithium battery 3 (the model is XKD) and the protection shield 17 (the model is YUBJ) mentioned in the utility model can be purchased from the market or obtained from private customization.

Referring to fig. 1 to fig. 3, the present invention provides an embodiment: a lithium battery pack over-temperature and over-current dual protection device comprises a lithium battery protection box 1, a protection box cover 6 is movably arranged on one side of the outer surface of the lithium battery protection box 1, lithium battery protection board devices 7 are arranged on one side of the inner wall of the protection box cover 6, the number of the lithium battery protection board devices 7 is four, each of the four lithium battery protection board devices 7 comprises a protection board connector 8, a limiting board A9, a through opening A10, a limiting board B11, a protection board connecting line 12, a spring 13, a spring groove 14, a through opening B15, a protection board general connector 16, a protection board 17, a mounting groove 18 and a protection board connector 19, a spring 13 is arranged inside the spring groove 14, a limiting board A9 is fixedly arranged on the lower end face of the spring 13, a protection board connector 8 is fixedly arranged in the middle position of the lower end face of a limiting board A9, a through opening A10 is arranged on the outer side of the protection board connector 8, the through opening A10 extends to the inside of the spring groove 14, a limiting board B11 is fixedly arranged on the upper end face of the spring 13, fixed port B15 that is equipped with in top of limiting plate B11, the inside of protection case lid 6 is equipped with mounting groove 18, port B15 extends to the inside of mounting groove 18, the inside of spring 13 is equipped with protection shield connecting wire 12, the vertical limiting plate A9 that runs through in bottom of protection shield connecting wire 12 passes through welding fixed connection with protection shield connector 8, the other end of protection shield connecting wire 12 runs through the inside that limiting plate B11 extends to mounting groove 18 through port B15, the other end of four protection shield connecting wires 12 all with the one end fixed connection of protection shield general connector 16, the other end of protection shield general connector 16 is located the inside of protection shield connector 19, protection shield connector 19 is located one side of protection shield 17 surface.

Further, the inside of lithium battery protection case 1 is equipped with standing groove 2, and the quantity of standing groove 2 is four, and four standing groove 2 even distributions are in lithium battery protection case 1's inside, and standing groove 2's inside is equipped with lithium cell 3, and the surface of lithium cell 3 is laminated closely with standing groove 2's inner wall, and lithium cell 3's up end is close to the equal fixed lithium cell connector 4 that is equipped with in position of both sides, can install lithium cell 3 through standing groove 2.

Further, fixed mounting has total connector 5 on the surface of lithium battery protection case 1, and total connector 5 passes through the power connecting wire with lithium battery connector 4 on four lithium cell 3 to be connected, can use lithium cell 3 through total connector 5.

Further, the protection box cover 6 is movably connected with the lithium battery protection box 1 through a rotating shaft, and the protection box cover 6 can be rotated through the rotating shaft.

Further, the positions of the four lithium battery protection plate devices 7 correspond to the lithium battery connectors 4 on the outer side of the upper end face of the lithium battery 3, and the protection plate connectors 8 are connected with the lithium battery connectors 4 when the protection box covers 6 are closed through corresponding to the positions of the protection plate devices.

Further, the bottom surface of the stopper plate a9 is larger than the through opening a10, and the upper end surface of the stopper plate B11 is larger than the through opening B15, so that the protector plate connection wire 12 can be inserted into the mounting groove 18 through the through opening B15.

Further, the outer surface of the protection board general connector 16 is closely attached to the inner wall of the protection board connector 19, the protection board 17 is fixedly installed on the inner wall of the installation groove 18, and the lithium battery 3 can be subjected to over-temperature and over-current dual protection through the protection board 17.

The working principle is as follows: when in use, the lithium battery 3 is placed in the placing groove 2, the protective box cover 6 is closed through the rotating shaft, when the protective box cover 6 is completely covered, the protective plate connector 8 is connected with the lithium battery connector 4, when the protective plate connector 8 is connected with the lithium battery connector 4, the lithium battery 3 is electrically connected with the protective plate 17 through the protective plate connecting wire 12, the lithium battery 3 can be subjected to over-temperature and over-current dual protection through the protective plate 17, when the protection board 17 is needed to be disconnected, the protection board connector 8 is disconnected with the lithium battery connector 4 after the protection board connector 6 is opened, flexibility when having improved installation protection shield 17 greatly through lithium battery protection shield device 7 is connected total connector 5 and the lithium battery connector 4 on four lithium batteries 3 through the power connecting wire, can use lithium battery 3 through total connector 5.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A lithium battery pack over-temperature and over-current dual protection device comprises a lithium battery protection box (1) and is characterized in that a protection box cover (6) is movably arranged on one side of the outer surface of the lithium battery protection box (1), a lithium battery protection board device (7) is arranged on one side of the inner wall of the protection box cover (6), the number of the lithium battery protection board devices (7) is four, the four lithium battery protection board devices (7) respectively comprise a protection board connector (8), a limiting board A (9), an opening A (10), a limiting board B (11), a protection board connecting line (12), a spring (13), a spring groove (14), an opening B (15), a protection board general connector (16), a protection board (17), a mounting groove (18) and a protection board connector (19), a spring (13) is arranged inside the spring groove (14), and a limiting board A (9) is fixedly arranged on the lower end face of the spring (13), the middle position of the lower end face of the limiting plate A (9) is fixedly provided with a protecting plate connector (8), the outer side of the protecting plate connector (8) is provided with an opening A (10), the opening A (10) extends to the inside of a spring groove (14), the upper end face of a spring (13) is fixedly provided with a limiting plate B (11), an opening B (15) is fixedly arranged above the limiting plate B (11), the inside of the protecting box cover (6) is provided with a mounting groove (18), the opening B (15) extends to the inside of the mounting groove (18), the inside of the spring (13) is provided with a protecting plate connecting wire (12), the bottom end of the protecting plate connecting wire (12) vertically penetrates through the limiting plate A (9) and is fixedly connected with the protecting plate connector (8) through welding, the other end of the connecting wire (12) penetrates through the limiting plate B (11) and extends to the inside of the mounting groove (18) through the opening B (15), four the other end of protection shield connecting wire (12) all with the one end fixed connection of protection shield general connector (16), the other end of protection shield general connector (16) is located the inside of protection shield connector (19), protection shield connector (19) are located one side of protection shield (17) surface.

2. The over-temperature and over-current dual protection device of the lithium battery pack according to claim 1, characterized in that: the inside of lithium battery protection case (1) is equipped with standing groove (2), the quantity of standing groove (2) is four, four standing groove (2) even distribution is in the inside of lithium battery protection case (1), the inside of standing groove (2) is equipped with lithium cell (3), the surface of lithium cell (3) is laminated closely with the inner wall of standing groove (2), the position that the up end of lithium cell (3) is close to both sides is all fixed and is equipped with lithium cell connector (4).

3. The over-temperature and over-current dual protection device of the lithium battery pack according to claim 1, characterized in that: fixed mounting has total connector (5) on the surface of lithium cell guard box (1), total connector (5) and four lithium cell connector (4) on lithium cell (3) are connected through the power connecting wire.

4. The over-temperature and over-current dual protection device of the lithium battery pack according to claim 1, characterized in that: the protection box cover (6) is movably connected with the lithium battery protection box (1) through a rotating shaft.

5. The over-temperature and over-current dual protection device of the lithium battery pack according to claim 1, characterized in that: the positions of the lithium battery protection plate devices (7) correspond to the lithium battery connectors (4) on the outer sides of the upper end faces of the lithium batteries (3) mutually.

6. The over-temperature and over-current dual protection device of the lithium battery pack according to claim 1, characterized in that: the bottom surface of the limiting plate A (9) is larger than the through opening A (10), and the upper end surface of the limiting plate B (11) is larger than the through opening B (15).

7. The over-temperature and over-current dual protection device of the lithium battery pack according to claim 1, characterized in that: the outer surface of the protective plate general connector (16) is closely attached to the inner wall of the protective plate connecting port (19), and the protective plate (17) is fixedly installed on the inner wall of the installation groove (18).