Lithium ion battery protection device

Abstract

The utility model discloses a lithium ion battery protection device which is characterized by comprising a battery shell, two ends of the battery shell are respectively provided with air holes, symmetrical limiting rods and symmetrical supporting plates are fixedly connected in the battery shell, and a vertical plate is fixedly connected in the battery shell; the group of lithium batteries are arranged in an area formed by the battery shell, the limiting rod, the supporting plate and the vertical plate; the BMS controller is fixedly connected with the vertical plate, and one group of lithium batteries are electrically connected with the BMS controller; the fan is fixedly connected with a box body, the box body is fixedly connected with the battery shell, the box body is matched with one air hole, the fan is electrically connected with the BMS controller, and the box body is fixedly communicated with a main pipe. The utility model relates to the technical field of lithium batteries, in particular to a lithium ion battery protection device. The technical problem to be solved by the utility model is to provide the lithium ion battery protection device which is beneficial to realizing high-temperature heat dissipation and low-temperature heating of the lithium ion battery.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and in particular to a lithium ion battery protection device. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery). It mainly relies on the movement of lithium ions between the positive and negative electrodes to work. Lithium-ion battery has now penetrated into all aspects of life. It makes electronic devices lighter and has longer battery life. Lithium-ion battery is known as green energy. It is small in size, light in weight, large in capacity, and pollution-free. It is gradually being recognized and applied to various fields.

[0003] Prior art, such as the utility model of a temperature protection device for lithium-ion batteries, with authorization announcement number CN211879562U, uses a cooling protection component to quickly dissipate heat from the battery to prevent safety accidents, and increases the durability and safety of lithium-ion batteries through real-time detection and protection measures.

[0004] Currently, there is a lack of a device that can achieve high-temperature heat dissipation and low-temperature heating protection for lithium-ion batteries to extend the life of lithium-ion batteries. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a lithium ion battery protection device, which is conducive to achieving high-temperature heat dissipation and low-temperature heating of the lithium ion battery.

[0006] The utility model adopts the following technical solutions to achieve the invention purpose:

[0007] A lithium-ion battery protection device, characterized in that it includes: a battery shell, with air holes respectively arranged at both ends, a symmetrical limit rod and a symmetrical support plate fixedly connected in the battery shell, and a vertical plate fixedly connected in the battery shell; a group of lithium batteries arranged in the area composed of the battery shell, the limit rod, the support plate and the vertical plate; a BMS controller fixedly connected to the vertical plate, and a group of lithium batteries are electrically connected to the BMS controller respectively; a fan fixedly connected to a box body, the box body is fixedly connected to the battery shell, the box body matches one of the air holes, the fan is electrically connected to the BMS controller, and the box body is fixedly connected to the main pipe; a T-shaped pipe, the vertical plate is fixedly connected to the T-shaped pipe, the T-shaped pipe is fixedly connected to the vertical pipe, the vertical pipe is arranged in the main pipe, the T-shaped pipe is fixedly connected to a group of air pipes, and the air pipe is provided with a group of air outlet holes. Filters are installed in the two air holes respectively. The fan is controlled by the BMS controller. When the temperature is high, the fan works to accelerate the interaction between the battery and the external environment, reduce the temperature, and realize the high temperature protection of the lithium battery.

[0008] As a further limitation of the technical solution, a heating wire is fixedly connected to the box body, and the heating wire is electrically connected to the BMS controller. By setting the heating wire, at low temperatures, the BMS controller controls the heating wire and the fan to heat the air and then transport it to the inside of the battery, thereby protecting the lithium battery from low temperatures.

[0009] As a further limitation of the technical solution, a group of exhaust holes are respectively provided on both sides of the battery shell, a symmetrical mounting frame is provided inside the battery shell, and each mounting frame is respectively fixedly connected to a group of blocking blocks, and the blocking blocks match the exhaust holes. By using the blocking blocks and the exhaust holes, the exhaust holes are opened at high temperatures to achieve heat dissipation.

[0010] As a further limitation of the technical solution, the vertical plate is fixedly connected to symmetrical electric push rods, the push rods of the symmetrical electric push rods are respectively fixedly connected to slide plates, the vertical plate is provided with symmetrical slots, the symmetrical slide plates are respectively arranged in the corresponding slots, the symmetrical slide plates are respectively fixedly connected to the corresponding installation frames, and the symmetrical electric push rods are respectively electrically connected to the BMS controller. By providing the electric push rods, power support is provided for the movement of the block.

[0011] As a further limitation of the technical solution, a temperature sensor is fixedly connected inside the battery shell, and the temperature sensor is electrically connected to the BMS controller. By providing the temperature sensor, the temperature inside the battery can be detected.

[0012] As a further limitation of the technical solution, a group of gas springs are fixedly connected in the battery shell, each of the gas springs is fixedly connected to a spring plate, and the piston rod of each gas spring is fixedly connected to a movable plate, and the movable plate contacts the lithium battery on one side. By providing the gas springs, the lithium battery is kept fixed when the lithium battery expands and contracts due to heat or cold.

[0013] Compared with the related art, the lithium-ion battery protection device provided by the utility model has the following advantages:

[0014] Beneficial effects:

[0015] (1) This device detects the temperature of the lithium battery by setting a temperature sensor, and detects low and high temperatures;

[0016] (2) The device is provided with a fan. When the temperature is high, the fan blows the external wind into the battery shell, and the block is separated from the exhaust hole, which is convenient for heat dissipation. When the temperature is low, the block blocks the exhaust hole, the heating wire is energized, and the wind heats the battery shell to heat the lithium battery.

[0017] (3) The device provides a gas spring to keep the lithium battery fixed when the lithium battery expands or contracts due to heat or cold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 .

[0019] Figure 2 It is an exploded view of a partial three-dimensional structure schematic diagram of the utility model.

[0020] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the utility model.

[0021] Figure 4 The partially cutaway three-dimensional structure of the utility model is shown in FIG. Figure 1 .

[0022] Figure 5 The partially cutaway three-dimensional structure of the utility model is shown in FIG. Figure 2 .

[0023] Figure 6 The three-dimensional structure of the utility model is shown in FIG. Figure 2 .

[0024] In the figure: 1. battery shell, 2. air hole, 3. exhaust hole, 4. box body, 5. main pipe, 6. lithium battery, 7. vertical plate, 8. fan, 9. heating wire, 10. gas spring, 11. spring plate, 12. moving plate, 13. limit rod, 14. installation frame, 15. blocking block, 16. support plate, 17. slot, 18. slide plate, 19. electric push rod, 20. BMS controller, 21. temperature sensor, 22. air pipe, 23. T-tube, 24. vertical pipe. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0026] Embodiment 1: A lithium-ion battery protection device comprises: a battery shell 1, with air holes 2 respectively arranged at both ends thereof, a symmetrical limit rod 13 and a symmetrical support plate 16 fixedly connected in the battery shell 1, and a vertical plate 7 fixedly connected in the battery shell 1; a group of lithium batteries 6, arranged in the area formed by the battery shell 1, the limit rod 13, the support plate 16 and the vertical plate 7; a BMS controller 20, fixedly connected to the vertical plate 7, a group of lithium batteries 6 are electrically connected to the BMS controller 20 respectively; a fan 8, fixedly connected to a box body 4, the box body 4 is fixedly connected to the battery shell 1, the box body 4 matches one of the air holes 2, the fan 8 is electrically connected to the BMS controller 20, and the box body 4 is fixedly connected to the main pipe 5; a T-shaped tube 23, the vertical plate 7 is fixedly connected to the T-shaped tube 23, the T-shaped tube 23 is fixedly connected to the vertical tube 24, the vertical tube 24 is arranged in the main pipe 5, the T-shaped tube 23 is fixedly connected to a group of air pipes 22, and the air pipe 22 is provided with a group of air outlet holes. Filters are installed in the two air holes 2. The fan 8 is controlled by the BMS controller 20. When the temperature is high, the fan 8 works to speed up the interaction between the battery and the external environment, reduce the temperature, and achieve high temperature protection for the lithium battery 6.

[0027] The box body 4 is fixedly connected with a heating wire 9, and the heating wire 9 is electrically connected to the BMS controller 20. By setting the heating wire 9, at low temperatures, the BMS controller 20 controls the heating wire 9 and the fan 8 to heat the air and then transport it to the inside of the battery, thereby protecting the lithium battery 6 from low temperatures.

[0028] The battery shell 1 is fixedly connected with a temperature sensor 21, and the temperature sensor 21 is electrically connected to the BMS controller 20. By providing the temperature sensor 21, the temperature inside the battery can be detected.

[0029] The working principle of a lithium-ion battery protection device provided by the utility model is as follows:

[0030] When the temperature sensor 21 detects low temperature, it controls the heating wire 9 to be powered on for heating, controls the fan 8 to work, and the fan 8 draws external air into the main pipe 5. The heating wire 9 heats the air, and the hot air is ejected from the air outlet through the main pipe 5, the vertical pipe 24, the T-shaped pipe 23 and the air pipe 22 to heat the lithium battery, and the air is discharged through another air hole 2.

[0031] When the temperature sensor 21 detects high temperature, the fan 8 is controlled to work, and the fan 8 draws external air into the main pipe 5. The cold air passes through the main pipe 5, the vertical pipe 24, the T-shaped pipe 23 and the air pipe 22, and is ejected from the air outlet to cool the lithium battery. The air is discharged through another air hole 2.

[0032] Embodiment 2: This embodiment is further described on the basis of embodiment 1, wherein a group of exhaust holes 3 are respectively provided on both sides of the battery shell 1, and a symmetrical mounting frame 14 is provided inside the battery shell 1, and each mounting frame 14 is respectively fixedly connected to a group of blocking blocks 15, and the blocking blocks 15 match the exhaust holes 3. By using the blocking blocks 15 and the exhaust holes 3, the exhaust holes 3 are opened at high temperatures to achieve heat dissipation.

[0033] The vertical plate 7 is fixedly connected to symmetrical electric push rods 19, and the push rods of the symmetrical electric push rods 19 are respectively fixedly connected to the slide plates 18. The vertical plate 7 is provided with symmetrical slots 17, and the symmetrical slide plates 18 are respectively arranged in the corresponding slots 17. The symmetrical slide plates 18 are respectively fixedly connected to the corresponding installation frames 14, and the symmetrical electric push rods 19 are respectively electrically connected to the BMS controller 20. By providing the electric push rods 19, power support is provided for the movement of the block 15.

[0034] The model of the electric push rod 19 is a mini push rod IP60.

[0035] The working principle of a lithium-ion battery protection device provided by the utility model is as follows:

[0036] At high temperature, the electric push rod 19 is controlled to shrink, the electric push rod 19 drives the slide plate 18 to move along the slot 17, the slide plate 18 drives the installation frame 14 to move, and the installation frame 14 drives the block 15 to move along the exhaust hole 3 and detach from the exhaust hole 3.

[0037] Embodiment 3: This embodiment is further described on the basis of Embodiment 1 or 2, wherein a group of gas springs 10 are fixedly connected in the battery housing 1, each of the gas springs 10 is respectively fixedly connected to a spring plate 11, and the piston rod of each of the gas springs 10 is respectively fixedly connected to a moving plate 12, and the moving plate 12 contacts one side of the lithium battery 6. By providing the gas springs 10, the lithium battery 6 is kept fixed when the lithium battery 6 expands and contracts due to heat or cold.

[0038] The working principle of a lithium-ion battery protection device provided by the utility model is as follows:

[0039] When the lithium battery 6 expands due to heat, the lithium battery 6 squeezes the movable plate 12, and the movable plate 12 compresses the gas spring 10. When the lithium battery 6 contracts due to cold, the gas spring 10 extends to keep the movable plate 12 in contact with the lithium battery 6.

[0040] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lithium-ion battery protection device, characterized in that: include: A battery shell (1) having air holes (2) at both ends thereof, symmetrical limiting rods (13) and symmetrical supporting plates (16) being fixedly connected inside the battery shell (1), and a vertical plate (7) being fixedly connected inside the battery shell (1); A group of lithium batteries (6) is arranged in an area formed by the battery shell (1), the limiting rod (13), the support plate (16) and the vertical plate (7); A BMS controller (20) is fixedly connected to the vertical plate (7), and a group of lithium batteries (6) are electrically connected to the BMS controller (20); A fan (8) is fixedly connected to a box body (4), the box body (4) is fixedly connected to the battery shell (1), the box body (4) matches one of the air holes (2), the fan (8) is electrically connected to the BMS controller (20), and the box body (4) is fixedly connected to the main pipe (5); The vertical plate (7) is fixedly connected to the T-shaped tube (23), the T-shaped tube (23) is fixedly connected to the vertical tube (24), the vertical tube (24) is arranged in the main tube (5), the T-shaped tube (23) is fixedly connected to a group of air pipes (22), and the air pipes (22) are provided with a group of air outlet holes.

2. The lithium-ion battery protection device according to claim 1, characterized in that: A heating wire (9) is fixedly connected inside the box body (4), and the heating wire (9) is electrically connected to the BMS controller (20).

3. The lithium-ion battery protection device according to claim 1, characterized in that: A group of exhaust holes (3) are respectively arranged on both sides of the battery shell (1), and a symmetrical mounting frame (14) is arranged inside the battery shell (1), and each of the mounting frames (14) is respectively fixedly connected to a group of blocking blocks (15), and the blocking blocks (15) match the exhaust holes (3).

4. The lithium-ion battery protection device according to claim 3, characterized in that: The vertical plate (7) is fixedly connected to symmetrical electric push rods (19), the push rods of the symmetrical electric push rods (19) are respectively fixedly connected to slide plates (18), the vertical plate (7) is provided with symmetrical slots (17), the symmetrical slide plates (18) are respectively arranged in the corresponding slots (17), the symmetrical slide plates (18) are respectively fixedly connected to the corresponding installation frames (14), and the symmetrical electric push rods (19) are respectively electrically connected to the BMS controller (20).

5. The lithium-ion battery protection device according to claim 1, characterized in that: A temperature sensor (21) is fixedly connected inside the battery shell (1), and the temperature sensor (21) is electrically connected to the BMS controller (20).

6. The lithium-ion battery protection device according to claim 1, characterized in that: A group of gas springs (10) are fixedly connected inside the battery shell (1), each of the gas springs (10) is respectively fixedly connected to a spring plate (11), and the piston rod of each of the gas springs (10) is respectively fixedly connected to a movable plate (12), and the movable plate (12) contacts the lithium battery (6) on one side.

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