CN211826391U

CN211826391U - Lithium battery protection box

Info

Publication number: CN211826391U
Application number: CN201922186161.5U
Authority: CN
Inventors: 高金津; 张越超; 高秀玲
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-10-30
Anticipated expiration: 2029-12-09

Abstract

The utility model provides a lithium battery protection box, belonging to the field of lithium battery manufacturing equipment, comprising a box body component, wherein the upper end of one side of the box body component is provided with an air inlet interface, the side surface of the box body is provided with a charging interface, control panel and the pressure relief device of demonstration parameter, gaseous collection connecting device cover establish in pressure relief device's the outside and with box fixed connection, pressure relief device includes from inside to outside bearing box and the gas box that sets gradually, the inner wall fixed connection of gas box and box subassembly, bearing box and gas box fixed connection, bearing box and gas box are two mutually independent cavitys, the savings power sets up in bearing the box, the savings power charges through the interface that charges, one side of gas box is equipped with the air inlet, one side that the bearing box was kept away from to the gas box is equipped with the gas outlet, one side that the bearing box was kept away from to the gas box still is equipped with the apron, be equipped with the elastic component that the drive apron removed to the gas box between apron and the gas box. The utility model discloses compromise leakproofness and security, can be used to the test of lithium cell, also can be used to the daily protection of lithium cell.

Description

Lithium battery protection box

Technical Field

The utility model belongs to lithium battery manufacturing equipment field relates to lithium battery protection box.

Background

Lithium ion batteries have been widely used in the fields of digital communication equipment, electric tools, electric vehicles, etc. because of their advantages of long cycle life, safety, environmental protection, high energy density, etc. With the explosive growth of portable electronic devices and electric vehicles, lithium ion batteries having higher energy density and higher safety are urgently required in the market, and in recent years, the development of high nickel positive electrodes and silicon/carbon negative electrodes has increased the energy density of batteries to higher levels, and at the same time, battery safety has been challenged more.

Before and after the general lithium battery is used, related safety tests are required, such as overcharge, heating, short circuit and the like are indispensable, the battery can bulge, smoke, fire and even explode possibly in the process, the existing protection equipment mostly meets the basic test requirements, but the design is simple, the flexibility and the convenience are relatively poor, the function of well releasing the pressure inside a test box can not be realized, the internal pressure of the box body in the test process is easily overhigh, huge potential safety hazards exist, certain sealing performance or certain special test atmosphere is required in some test processes, and the requirements of the traditional protection and the box body cannot be reasonably balanced.

The common battery protection box body has the following problems that (1) if the common battery test box body is closed, a box door can be opened when a battery is on fire or explodes, and huge potential safety hazards exist; (2) if the battery is directly communicated with the outside to facilitate exhaust, the sealing property is poor, and the thermal runaway test of the battery under different atmospheres cannot be carried out; (3) the adiabatic calorimeter can realize the test in a sealed bin and ensure the safety, but the cost is high, and the gas generated in the thermal runaway process cannot be sampled and analyzed in real time.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to provide a lithium cell protective housing, compromise leakproofness and security, solve not enough among the prior art.

In order to solve the technical problem, the utility model discloses a technical scheme is: the lithium battery protection box comprises a box body assembly, wherein the upper end of one side of the box body assembly is provided with an air inlet interface, the side surface of the box body is provided with a charging interface, a control panel for displaying parameters and a pressure reducing device, and a gas collecting and connecting device covers the outer side of the pressure reducing device and is fixedly connected with the box body;

the pressure relief device comprises a bearing box and a gas box which are sequentially arranged from inside to outside, the gas box is fixedly connected with the inner wall of the box body assembly, the bearing box is fixedly connected with the gas box, the bearing box and the gas box are two mutually independent cavities, a storage power supply is arranged in the bearing box, the storage power supply passes through the charging interface, one side of the gas box is provided with an air inlet, the gas box is far away from one side of the bearing box is provided with a gas outlet, the gas box is far away from one side of the bearing box is further provided with an cover plate, the cover plate is correspondingly arranged with the gas outlet, and an elastic piece for driving the cover plate to move towards the gas box is arranged between the cover plate and the gas box.

Furthermore, the elastic element is of a spring, rubber or thermoplastic elastomer structure, and the pretension force of the elastic element is greater than or equal to zero when the cover plate is attached to the air box.

Further, the elastic component is a spring, the four corners of the cover plate are close to one end of the gas box, a guide post is arranged at one end of the gas box, the guide post is perpendicular to the gas box, the gas box is arranged and slides back and forth relative to the gas box, the guide post is arranged in a sealing mode with the gas box, and two springs and the guide posts are arranged between every two adjacent guide posts in a dispersing mode.

Furthermore, the gas collecting and connecting device consists of a square welding part with a certain length and a round telescopic soft channel, the connection with the box body is realized through a welding bead, and the height of the direction welding part is greater than the telescopic stroke of the cover plate.

Furthermore, be equipped with the temperature sensor of monitoring inside temperature and the smoke transducer of gaseous quality on bearing the weight of the box, temperature sensor and smoke transducer all are connected with control center electricity, and are in real time the control panel shows data.

Furthermore, the model of the control panel is 5085DL, the model of the temperature sensor is WRC2-101, and the model of the smoke sensor is JTY-GD-F343.

Furthermore, the front of the box body assembly is also provided with an alarm and an explosion-proof window for observing the internal state, the alarm is electrically connected with the control center, and a sealing ring is bonded at the joint of the explosion-proof window and the box body.

Further, the box body assembly comprises a box body, a box door and lock catches, the box door is movably and hermetically connected with the box body through the lock catches, and the number of the lock catches is two and the lock catches are uniformly distributed in an up-down dispersing mode.

Furthermore, the top of box is equipped with a plurality of bottom blocks, the lower extreme of box is equipped with a plurality of kicking blocks, bottom block and kicking block are L shape, the opening direction symmetry of bottom block and kicking block sets up, bottom block and kicking block correspond the setting from top to bottom.

Furthermore, the upper end of the side face of the box body is provided with a bearing plate, a spring hook block is arranged above the bearing plate, a hook ring is arranged at the lower end of one side of the box body, and when the adjacent box bodies are connected and fixed up and down, the spring hook block of the box body below is fixedly connected with the hook ring of the box body above.

Compared with the prior art, the utility model has the advantages and positive effect as follows.

1. When the internal pressure of the box body is larger, the cover plate moves relative to the gas box, gas enters from the gas inlet, the gas outlet is discharged, the pressure in the box body is reduced, the cover plate can be reset by the elastic piece, the problem of overhigh internal pressure is solved, destructive phenomena such as explosion and the like caused by overhigh internal pressure are avoided, the safety is improved, and meanwhile, the gas collecting and connecting device is arranged, so that the situation that the thermal runaway test protective box of the battery under different atmospheres can timely release the pressure can be realized, and the protective box can simultaneously take the sealing property and the safety into account;

2. the guide post is beneficial to the cover plate not to deviate easily, the moving precision of the cover plate is improved, the sealing performance is ensured, and the thermal runaway test of the battery under different atmospheres is realized;

3. the protection box is not limited to safety test, is provided with a temperature sensor and a smoke alarm, can be simultaneously applied to equipment such as a lithium battery charging and discharging process or other protection devices, collects data, and intervenes in time once abnormality occurs;

4. the protective boxes can be connected and fixed, the top block and the bottom block are arranged, the top block and the bottom block can be inserted, and then the spring hook block is stretched to hook the hook ring, so that the protective boxes are not easy to separate and can be used independently, a plurality of protective boxes can be connected for use, space limitation is avoided, and cost can be controlled;

5. the internal phenomenon of box can be observed at any time to visual explosion-proof window, and the external high definition digtal camera of being convenient for monitors the test procedure often.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural diagram of a lithium battery protection box of the present invention;

fig. 2 is a sectional view of the lithium battery protection box of the present invention;

FIG. 3 is a schematic structural view of the pressure reducing device of the present invention;

fig. 4 is a schematic diagram of the circuit structure of the present invention.

Reference numerals:

1. a box body; 2. locking; 3. a box door; 4. a pressure reducing device; 41. a carrying box; 42. a gas box; 43. an air inlet; 44. An air outlet; 45. a guide post; 46. a spring; 47. a cover plate; 51. a bottom block; 52. a top block; 53. a carrier plate; 54. A spring hook block; 55. a shackle; 56. an explosion-proof window; 6. a charging interface; 7. storing the power supply; 8. a control panel; 9. a temperature sensor; 10. a smoke sensor; 11. an alarm; 12. an air inlet interface; 13. and a gas collection connecting device.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being 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. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1 to 4, the lithium battery protection box comprises a box body assembly, wherein an air inlet interface 12 is arranged at the upper end of one side of the box body assembly, a charging interface 6, a control panel 8 for displaying parameters and a pressure reducing device 4 are arranged on the side surface of the box body 1, and a gas collecting and connecting device 13 is covered on the outer side of the pressure reducing device 4 and is fixedly connected with the box body 1;

the pressure reducing device 4 comprises a bearing box 41 and an air box 42 which are sequentially arranged from inside to outside, the air box 42 is fixedly connected with the inner wall of the box body assembly, the bearing box 41 is fixedly connected with the air box 42, the bearing box 41 and the air box 42 are two mutually independent cavities, the storage power supply 7 is arranged in the bearing box 41, the storage power supply 7 is charged through a charging interface 6, one side of the air box 42 is provided with an air inlet 43, one side of the air box 42, which is far away from the bearing box 41, is provided with an air outlet 44, one side of the air box 42, which is far away from the bearing box 41, is also provided with a cover plate 47, the cover plate 47 is arranged corresponding to the air outlet 44, an elastic part for driving the cover plate 47 to move towards the air box 42 is arranged between the cover plate 47 and the air box 42, when the internal pressure of the box body 1 is higher, the air in the box body 1 can enter the air box 42 through the air inlet 43 on the, the cover plate 47 can be pushed forwards, then when the cover plate 47 and the box body 1 are pushed away by a gap, gas can flow out of the box body 1, when a large amount of gas in the box body 1 flows out, the pressure in the box body 1 is reduced, the spring 46 can reset the cover plate 47, the guide column 45 is beneficial to the cover plate 47 not to deviate easily, the problem that the internal pressure is too high is solved, the safety is improved, the protective box has the sealing performance at the same time, and the thermal runaway test of the battery under different atmospheres can be realized; preferably, the air inlet 43 has a rectangular parallelepiped shape, and the height of the air inlet 43 is 3 cm.

Preferably, the elastic element is of a spring 46, rubber or thermoplastic elastomer structure, and the pretension force of the elastic element is greater than or equal to zero when the cover plate 47 is attached to the air box 42, so that a certain pretension force is provided for the cover plate 47 to be tightly attached to the air box 42, and the sealing performance of the whole structure is ensured.

Preferably, the elastic member is a spring 46, guide posts 45 are arranged at one end, close to the air box 42, of four corners of the cover plate 47, the guide posts 45 are perpendicular to the air box 42 and are arranged in a front-back sliding mode relative to the air box 42, the guide posts 45 are arranged in a sealing mode with the air box 42, two springs 46 are arranged between every two adjacent guide posts 45 and are arranged in a dispersing mode, and preferably, the height of each guide post 45 is 10 cm.

Preferably, gas collection connecting device 13 comprises the square welding piece of certain length and circular scalable soft passageway, realize being connected with box 1 through the welding bead, the direction welding piece highly is greater than apron 47 flexible stroke, conveniently loses heart, carry out the gas composition analysis among the thermal runaway test procedure, or install gas flowmeter additional, statistics thermal runaway in-process gas flow size also can be according to the demand, be connected direct entering recovery system with exhaust pipe, the function is various and the cost is controllable.

Preferably, be equipped with the smoke sensor 10 of the temperature sensor 9 of monitoring inside temperature and gas quality on bearing box 41, temperature sensor 9 and smoke sensor 10 all are connected with the control center electricity, and show data on control panel 8 in real time, temperature sensor 9 can detect the temperature to box 1 inside in real time, then can handle the storage with the central processing unit of temperature information transmission to control center, smoke sensor 10 can detect the smog concentration to box 1 inside in real time, then can handle the storage with the central processing unit of smog concentration information transmission to control center, has the early warning function, if numerical value exceeds the default, alarm 11 will start, send alarm signal, control center adopt PLC control can, and is easy to operate, the controllability is strong.

Preferably, the control panel 8 is 5085DL in model number, the use is simple, the temperature sensor 9 is WRC2-101 in model number, the precision is high, and the smoke sensor 10 is JTY-GD-F343 in model number, and the precision is high.

Preferably, the front of box subassembly still is equipped with alarm 11 and the explosion-proof window of observing the internal state, and alarm 11 is connected with the control center electricity, and the model of alarm 11 is YK-828, and relatively power saving, explosion-proof window 56 and box 1 junction bond have the sealing washer, and explosion-proof window 56 is the square form, and it is convenient to cut, and is with low costs, and explosion-proof window 56 does not receive size restriction, can be according to practical demand, adjustment window size, or installation high definition digtal camera, and the internal phenomenon is monitored often to the adjustment position.

Preferably, the box subassembly includes box 1, chamber door 3 and hasp 2, and chamber door 3 passes through hasp 2 and the movable sealing connection of box 1, and the quantity of hasp 2 is two and upper and lower dispersion equipartition setting, and the product of purchasing can be realized on hasp 2 direct adoption market, and the movable structure of opening of chamber door 3 makes things convenient for depositing and taking of lithium cell, promotes the convenience of operation.

Preferably, a connecting assembly is arranged at the top end of the box body 1, the connecting assembly comprises a plurality of bottom blocks 51, a plurality of top blocks 52 are arranged at the lower end of the box body 1, the bottom blocks 51 and the top blocks 52 are L-shaped, the opening directions of the bottom blocks 51 and the top blocks 52 are symmetrically arranged, the bottom blocks 51 and the top blocks 52 are arranged up and down correspondingly, the number of the top blocks 52 and the bottom blocks 51 is preferably three, and rubber pads are covered on the inner sides of the bottom blocks 51 and the top blocks 52, so that the stability in multiple connection is ensured, collision is prevented, and a certain anti-seismic effect is achieved; more preferably, the upper end of the side of the box 1 is provided with a bearing plate 53, a spring 46 hook block is arranged above the bearing plate 53, a hook ring 55 is arranged at the lower end of one side of the bearing plate 53 on the box 1, when the adjacent box 1 is connected and fixed up and down, the spring 46 hook block of the lower box 1 is fixedly connected with the hook ring 55 of the upper box 1, the protective box can be used alone, and a plurality of protective boxes can be connected for use without space limitation and cost control.

In the actual use process, the storage power supply 7 is fully charged through the charging interface 6, then the box door 3 can be opened, then the lithium battery is placed in the box body 1 and connected with the charging and discharging terminals, and then the box door 3 is closed and the lock catch 2 is locked; when special atmosphere is needed in the test, the gas bottle can be externally connected through the gas inlet interface 12, so that the test atmosphere in the box body 1 is ensured; during the test, when the internal pressure of the box body 1 is high, the gas in the box body 1 enters the gas box 42 through the gas inlet 43 on the right side of the gas box 42 and then is gathered at the rear end of the cover plate 47 through the gas outlet 44, when the pressure of the gas in the box body 1 is continuously increased, the cover plate 47 can be pushed forwards, then when the cover plate 47 and the box body 1 are pushed away by a gap, the gas flows out of the box body 1, when the gas in the box body 1 flows out in a large quantity, the pressure in the box body 1 is reduced, the cover plate 47 can be reset through the elastic piece 46, the guide column 45 is beneficial to the cover plate 47 to be not easy to deviate from the position, and the problem that the function of well reducing the pressure in the protection box is not achieved, and the pressure in; after pressure relief, gas and the like can enter a recovery system according to test purposes and requirements or can be directly connected, or qualitative and quantitative analysis of gas generated in a thermal runaway process is required, a gas flowmeter and a gas collecting and connecting device can be additionally arranged at the tail end of gas collecting and connecting for analyzing gas generation flow and gas components in the thermal runaway process, when a plurality of protective boxes are required to be connected, a top block 51 and a bottom block 52 can be spliced, a spring hook block 54 is stretched to hook a hook ring 55, so that the protective boxes can not be separated, the internal condition of the box body 1 can be observed through an explosion-proof window 56, a temperature sensor 9 can detect the temperature inside the box body 1 in real time, then temperature information can be transmitted to a central processing unit of a control center for processing, a smoke sensor 10 can detect the smoke concentration inside the box body 1 in real time, then the smoke concentration information can be transmitted to the central processing unit for reasonably triggering the alarm 11, the problem of do not possess can connect a plurality of protective housing and carry out the function of the danger early warning to the incasement, when this protective housing guaranteed the security performance, compromise the inside sealing performance, can satisfy the thermal runaway test of battery under different atmospheres.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. Lithium cell protective housing, its characterized in that: the gas collection and connection device is covered on the outer side of the pressure reducing device and is fixedly connected with the box body;

2. The lithium battery protection box of claim 1, characterized in that: the elastic piece is of a spring, rubber or thermoplastic elastomer structure, and the pretension force of the elastic piece is larger than or equal to zero when the cover plate is attached to the air box.

3. The lithium battery protection box of claim 2, characterized in that: the elastic component is a spring, the four corners of the cover plate are close to one end of the gas box, a guide post is arranged at one end of the cover plate, the guide post is perpendicular to the gas box and slides back and forth relative to the gas box, the guide post and the gas box are arranged in a sealing mode, and two springs and two guide posts are arranged between every two adjacent guide posts in a dispersing mode.

4. The lithium battery protection box of claim 1, characterized in that: the gas collecting and connecting device consists of a square welding part with a certain length and a round telescopic soft channel, the gas collecting and connecting device is connected with the box body through a welding bead, and the height of the direction welding part is larger than the telescopic stroke of the cover plate.

5. The lithium battery protection box of claim 1, characterized in that: the bearing box is provided with a temperature sensor for monitoring the internal temperature and a smoke sensor for monitoring the gas quality, and the temperature sensor and the smoke sensor are electrically connected with the control center and display data on the control panel in real time.

6. The lithium battery protection box of claim 5, characterized in that: the model of the control panel is 5085DL, the model of the temperature sensor is WRC2-101, and the model of the smoke sensor is JTY-GD-F343.

7. The lithium battery protection box of claim 1, characterized in that: the front of the box body assembly is also provided with an alarm and an explosion-proof window for observing the internal state, the alarm is electrically connected with the control center, and a sealing ring is bonded at the joint of the explosion-proof window and the box body.

8. The lithium battery protection box of claim 1, characterized in that: the box body assembly comprises a box body, a box door and lock catches, the box door is movably and hermetically connected with the box body through the lock catches, and the number of the lock catches is two and the lock catches are uniformly distributed in an up-down dispersing mode.

9. The lithium battery protection box of claim 8, wherein: the top of box is equipped with a plurality of bottom blocks, the lower extreme of box is equipped with a plurality of kicking blocks, bottom block and kicking block are L shape, the opening direction symmetry of bottom block and kicking block sets up, bottom block and kicking block correspond the setting from top to bottom.

10. The lithium battery protection box of claim 8, wherein: the improved box is characterized in that a bearing plate is arranged at the upper end of the side face of the box body, a spring hook block is arranged above the bearing plate, a hook ring is arranged at the lower end of one side of the box body, and when adjacent box bodies are connected and fixed up and down, the spring hook block of the box body below is fixedly connected with the hook ring of the box body above.