CN215184434U

CN215184434U - Over-temperature power-off protection mechanism for lithium battery

Info

Publication number: CN215184434U
Application number: CN202121394323.5U
Authority: CN
Inventors: 吕振国; 刘嘉; 王宏义; 张彤; 韦涛; 葛梁梁
Original assignee: Shandong Dlg Electronics Co ltd
Current assignee: Shandong paizhi Electronics Co.,Ltd.
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-12-14
Anticipated expiration: 2031-06-22

Abstract

The utility model relates to a lithium cell technical field specifically is a too high temperature power-off protection mechanism for lithium cell. The utility model discloses the protection nature that solves is poor and power-off protection's technical problem. In order to solve the technical problem, the utility model provides a lithium cell is with high temperature outage protection mechanism, the utility model discloses mainly by protective housing, protective sleeve lid, closing mechanism and outage mechanism constitute, when responding to lithium cell body surface temperature through temperature sensor and being too high, trigger automatic circuit breaker control and connect on lithium cell body and the conductor base conductor piece disconnection, the outage protection has been realized, bee calling organ sends the police dispatch newspaper simultaneously, convenience of customers knows, length through second sleeve and first sleeve increases, thereby promote the closed ventilative frame of rotor plate, the inside complete sealing of protective housing has been realized, ventilative frame keeps opening under the effect of extension spring during normal use, protective housing's inside ventilation is good, lithium cell body heat dispersion has been improved.

Description

Over-temperature power-off protection mechanism for lithium battery

Technical Field

The utility model relates to a lithium cell technical field specifically is a too high temperature power-off protection mechanism for lithium cell.

Background

The lithium battery is a battery which takes lithium metal or lithium alloy as a positive/negative electrode material and uses non-aqueous electrolyte solution, can generate heat when the lithium battery is charged or used, needs to use a power-off protection mechanism, avoids the accident caused by overhigh temperature of the lithium battery, effectively protects the safety of equipment, but the existing power-off protection mechanism has the following defects:

the existing lithium battery does not have a protection function when in use, and part of the existing lithium battery is protected by a protection shell, so that the heat dissipation of the lithium battery is poor, and the internal temperature rise can be accelerated; the existing lithium battery does not have a power-off protection function when generating high temperature, and the warning function is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an excess temperature outage protection mechanism for lithium cell through setting up closing mechanism to the poor problem of heat dissipation when proposing the protection in solving above-mentioned background.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a high temperature outage protection mechanism for lithium cell, includes protective housing, protective cover lid, closing mechanism and outage mechanism, protective housing's a curb plate surface top fixed mounting has first rotation piece, rotate on the first rotation piece and install the protective cover lid, the lag is covered and is installed outage mechanism, the frame of ventilating is all embedded to install by four curb plates of protective housing, closing mechanism is all installed near the position of four frames of ventilating to protective housing's inside, protective housing's internally mounted has lithium cell body.

The power-off mechanism comprises a built-in shell, a battery, a temperature sensor and an automatic circuit breaker, the built-in shell is fixedly mounted on the bottom surface of the protective sleeve cover, the battery and the automatic circuit breaker are fixedly mounted on the top surface of the bottom plate of the built-in shell, and the temperature sensor is fixedly mounted at the bottom of the built-in shell.

The closing mechanism includes that first sleeve, second sleeve, rotor plate and second rotate the piece, the second rotates a piece fixed mounting and installs a lateral wall surface at ventilative frame, the second rotates and rotates the piece and goes up to rotate and install the rotor plate, first sleeve fixed mounting is at lithium cell body lateral wall surface, slidable mounting has the second sleeve on the first sleeve, the inside packing of first sleeve and second sleeve has the liquid that expands with heat, a lateral wall surface and rotor plate side surface overlap joint of second sleeve.

In order to facilitate fixing of the protective cover cap and improve the internal sealing performance of the protective shell, preferably, a buckle is installed between the surface of one side, away from the first rotating piece, of the protective cover cap and the protective shell.

In order to facilitate warning of users and convenience in installation and use of electric equipment, preferably, the protective cover is embedded with a conductor base, the conductor base is provided with two conductor blocks, and the top of the protective cover is fixedly provided with a buzzer.

In order to make opening of rotating plate under the normal atmospheric temperature state, improve inside gas permeability, preferably, one side fixed surface that the second rotated the piece was kept away from to the rotating plate has the extension spring, the one end fixed mounting that the rotating plate was kept away from to the extension spring is on lithium cell body side surface.

In order to protect the lithium battery body in a buffering manner, preferably, a buffering pad is fixedly installed between the protective shell and the lithium battery body.

In order to provide power for the buzzer and the temperature sensor, preferably, the buzzer and the temperature sensor are both electrically connected with the battery.

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

(1) the utility model discloses be provided with outage mechanism, connect the power consumption article through two conductor blocks on the conductor base, when temperature sensor responds to lithium cell body surface temperature too high, trigger automatic circuit breaker control connection lithium cell body and conductor block disconnection on the conductor base, realized the power-off protection, bee calling organ sends out the police dispatch newspaper simultaneously, convenience of customers knows;

(2) the utility model discloses be provided with closing mechanism, through the liquid volume increase of thermal expansion, the length of second sleeve and first sleeve increases to promote the closed ventilative frame of rotor plate, realized the inside complete sealing of protective housing, ventilative frame keeps opening under the effect of extension spring during normal use, and protective housing's inside ventilation is good, has improved lithium cell body heat dispersion, has realized the high temperature protection to lithium cell body.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic view of the structure of the present invention;

fig. 3 is a schematic top sectional view of the present invention;

FIG. 4 is a schematic sectional view of the built-in housing of the present invention;

fig. 5 is a partially enlarged view of a portion a of fig. 3 according to the present invention;

fig. 6 is a schematic view of a front sectional structure of the first sleeve of the present invention.

In the figure: 1. a protective housing; 2. a protective cover; 3. a gas permeable frame; 4. a conductor mount; 5. a first rotating member; 6. buckling; 7. a lithium battery body; 8. a battery; 9. a temperature sensor; 10. an automatic circuit breaker; 11. a built-in housing; 12. a first sleeve; 13. a second sleeve; 14. a rotating plate; 15. a second rotating member; 16. a tension spring; 17. a thermally expansive liquid; 18. a buzzer; 19. a cushion pad.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-6, an over-temperature power-off protection mechanism for a lithium battery includes a protection housing 1, a protection cover 2 and a power-off mechanism, a first rotating member 5 is fixedly installed on the top of the outer surface of one side plate of the protection housing 1, the protection cover 2 is rotatably installed on the first rotating member 5, the power-off mechanism is installed on the protection cover 2, a ventilation frame 3 is installed in each of four side plates of the protection housing 1 in an embedded manner, a lithium battery body 7 is installed inside the protection housing 1, a buffer pad 19 is fixedly installed between the protection housing 1 and the lithium battery body 7 for buffering and protecting the lithium battery body 7, the protection cover 2 is fixed for facilitating the improvement of the internal sealing performance of the protection housing 1, and a buckle 6 is installed between one side surface of the protection cover 2, which is far away from the first rotating member 5, and the protection housing 1.

Outage mechanism includes built-in casing 11, battery 8, temperature sensor 9 and automatic circuit breaker 10, the bottom surface fixed mounting of protective sleeve lid 2 has built-in casing 11, the bottom plate top surface fixed mounting of built-in casing 11 has battery 8 and automatic circuit breaker 10, built-in casing 11 bottom fixed mounting has temperature sensor 9, for the convenience of warning user of using and make things convenient for the installation of consumer to use, embedded conductor base 4 of installing on protective sleeve lid 2, install two conductor blocks on the conductor base 4, the top fixed mounting of protective sleeve lid 2 has bee calling organ 18, for providing the power for bee calling organ 18 and temperature sensor 9, bee calling organ 18 and temperature sensor 9 all with battery 8 electric connection.

Through two conductor blocks on the conductor base 4 connection power consumption article, when temperature sensor 9 response lithium cell 7 surface temperature was too high, triggered automatic circuit breaker 10 control connection lithium cell 7 and conductor base 4 on the conductor block disconnection, buzzer 18 sent the police dispatch newspaper simultaneously, convenience of customers informed.

Example two:

referring to fig. 1-6, an over-temperature power-off protection mechanism for a lithium battery includes a protection housing 1, a protection cover 2 and a closing mechanism, a first rotating member 5 is fixedly installed on the top of the outer surface of one side plate of the protection housing 1, the protection cover 2 is rotatably installed on the first rotating member 5, a ventilation frame 3 is embedded in each of four side plates of the protection housing 1, the closing mechanism is installed at a position, close to the four ventilation frames 3, inside the protection housing 1, a lithium battery body 7 is installed inside the protection housing 1, for buffering and protecting the lithium battery body 7, a buffer pad 19 is fixedly installed between the protection housing 1 and the lithium battery body 7, for fixing the protection cover 2, the internal sealing performance of the protection housing 1 is improved, and a buckle 6 is installed between one side surface, far away from the first rotating member 5, of the protection cover 2 and the protection housing 1.

The closing mechanism includes first sleeve 12, second sleeve 13, rotor plate 14 and second rotate piece 15, second rotates piece 15 fixed mounting at a lateral wall surface of ventilative frame 3, rotor plate 14 is installed in the rotation on the second rotates piece 15, first sleeve 12 fixed mounting is at a lateral wall surface of lithium cell body 7, slidable mounting has second sleeve 13 on first sleeve 12, the inside packing of first sleeve 12 and second sleeve 13 has thermal expansion liquid 17, a lateral wall surface and the 14 a lateral surface overlap joint of rotor plate of second sleeve 13, for opening of rotor plate 14 under the normal atmospheric temperature state, improve inside gas permeability, rotor plate 14 keeps away from a lateral surface fixed mounting that second rotated piece 15 has extension spring 16, the one end fixed mounting that rotor plate 14 was kept away from to extension spring 16 is at lithium cell body 7 a lateral surface.

When the inside temperature of protective housing 1 risees, because expend with heat and contract with cold principle makes expend with heat liquid 17 volume increase, the length of second sleeve 13 and first sleeve 12 increases, thereby promote 14 closed ventilative frames 3 of rotor plate, realized the inside complete closure of protective housing 1, ventilative frame 3 keeps opening under the effect of extension spring 16 during normal use, protective housing 1's inside ventilation is good, lithium cell body 7 heat dispersion has been improved, the high temperature protection to lithium cell body 7 has been realized.

The working principle is as follows: when the electric appliance elements appearing in the application are used, the battery 8 is internally connected, the protective shell 1 can adopt high-strength carbon steel as a protective material, when the electric appliance is used, the electric appliance is connected through two conductor blocks on the conductor base 4, when the temperature sensor 9 senses that the surface temperature of the lithium battery body 7 is overhigh, the automatic circuit breaker 10 is triggered to control the connection of the lithium battery body 7 and the conductor blocks on the conductor base 4, and the buzzer 18 gives an alarm, so that the user can know the information conveniently, when the internal temperature of the protective shell 1 rises, the volume of the thermal expansion liquid 17 is increased due to the thermal expansion and cold contraction principle, the length of the second sleeve 13 and the first sleeve 12 is increased, so that the rotating plate 14 is pushed to close the ventilation frame 3, the complete sealing of the internal part of the protective shell 1 is realized, the ventilation frame 3 is kept open under the action of the tension spring 16 during normal use, the internal ventilation of the protective shell 1 is good, the heat dissipation performance of the lithium battery body 7 is improved, and the high-temperature protection of the lithium battery body 7 is realized.

It is well within the skill of those in the art to implement, without undue experimentation, the present invention does not relate to software and process improvements, as related to the circuit and electronic components and control modules.

In the description of the present invention, it is to be understood that the terms "center", "middle", "eccentric", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

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. The utility model provides a too high power-off protection mechanism of temperature for lithium cell which characterized in that: the protective device comprises a protective shell (1), a protective sleeve cover (2), a closing mechanism and a power-off mechanism, wherein a first rotating piece (5) is fixedly installed at the top of the outer surface of one side plate of the protective shell (1), the protective sleeve cover (2) is installed on the first rotating piece (5) in a rotating mode, the power-off mechanism is installed on the protective sleeve cover (2), breathable frames (3) are installed in four side plates of the protective shell (1) in an embedded mode, the closing mechanism is installed at positions, close to the four breathable frames (3), in the protective shell (1), and a lithium battery body (7) is installed in the protective shell (1);

the power-off mechanism comprises a built-in shell (11), a battery (8), a temperature sensor (9) and an automatic circuit breaker (10), the built-in shell (11) is fixedly installed on the bottom surface of the protective sleeve cover (2), the battery (8) and the automatic circuit breaker (10) are fixedly installed on the top surface of the bottom plate of the built-in shell (11), and the temperature sensor (9) is fixedly installed at the bottom of the built-in shell (11);

closing mechanism includes that first sleeve (12), second sleeve (13), rotor plate (14) and second rotate piece (15), second rotates piece (15) fixed mounting and has a lateral wall surface at ventilative frame (3), second rotates piece (15) and goes up rotary mounting and have rotor plate (14), first sleeve (12) fixed mounting is at lithium cell body (7) a lateral wall surface, slidable mounting has second sleeve (13) on first sleeve (12), the inside packing of first sleeve (12) and second sleeve (13) has thermal expansion liquid (17), a lateral wall surface and rotor plate (14) a lateral surface overlap joint of second sleeve (13).

2. The over-temperature power-off protection mechanism for the lithium battery as claimed in claim 1, wherein: a buckle (6) is arranged between the surface of one side, far away from the first rotating piece (5), of the protective sleeve cover (2) and the protective shell (1).

3. The over-temperature power-off protection mechanism for the lithium battery as claimed in claim 1, wherein: the conductor base (4) is embedded and installed on the protective sleeve cover (2), the two conductor blocks are installed on the conductor base (4), and the buzzer (18) is fixedly installed at the top of the protective sleeve cover (2).

4. The over-temperature power-off protection mechanism for the lithium battery as claimed in claim 1, wherein: one side fixed surface that the second rotated piece (15) was kept away from in rotating board (14) has extension spring (16), one end fixed mounting that rotating board (14) was kept away from in extension spring (16) is on lithium cell body (7) one side surface.

5. The over-temperature power-off protection mechanism for the lithium battery as claimed in claim 1, wherein: a buffer pad (19) is fixedly arranged between the protective shell (1) and the lithium battery body (7).

6. The over-temperature power-off protection mechanism for the lithium battery as claimed in claim 3, wherein: the buzzer (18) and the temperature sensor (9) are both electrically connected with the battery (8).