Explosion-proof lithium battery with pressure relief function

Abstract

The utility model discloses an explosion-proof lithium battery with a pressure relief function, which belongs to the technical field of explosion-proof lithium batteries and comprises a lithium battery body, a protection component is arranged outside the lithium battery body, a heat dissipation component is arranged below the lithium battery body, and poles are arranged on two sides of the upper portion of the lithium battery body. A pressure relief device is arranged in the middle of the upper part of the lithium battery body, a liquid injection hole is formed in one side of the pressure relief device, and a controller is arranged on the other side of the pressure relief device; according to the lithium battery disclosed by the utility model, the heat dissipation assembly is arranged, the contact plate is arranged below the lithium battery body, and the heat conduction block and the heat conduction fins are arranged below the contact plate, so that heat generated when the lithium battery body works can be conducted into the liquid storage cavity; and the two sides of the liquid storage cavity are provided with a cold conduction block and a semiconductor chilling plate, so that the cooling liquid can be quickly cooled.

Description

Technical Field

[0001] The utility model belongs to the technical field of explosion-proof lithium batteries, and in particular relates to an explosion-proof lithium battery with pressure relief. Background Art

[0002] Lithium batteries refer to batteries that contain metallic lithium, lithium alloys, lithium ions, and lithium polymers in their electrochemical systems. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium metal batteries are usually non-rechargeable and contain metallic lithium. Lithium ion batteries do not contain metallic lithium and are rechargeable.

[0003] Chinese patent publication number CN215377620U discloses a lithium battery structure capable of automatically exhausting and relieving pressure, comprising a battery body, characterized in that it also comprises an exhaust and pressure relief device, which is installed in the battery body and located between two poles on the battery body. The exhaust and pressure relief device not only has the function of an explosion-proof valve on a battery top cover on the market, but also has the function of automatically adjusting the internal pressure of the lithium battery; the exhaust and pressure relief device valve switch controls the discharge of gas inside the battery to ensure that the internal pressure of the lithium battery is balanced with the external pressure; when the inside of the lithium battery is in contact with the outside world, moisture in the gas exchange process can be removed by a desiccant; the present invention reduces the risk factor of gas expansion inside the battery and prolongs the service life of the battery body by actively exhausting and relieving pressure.

[0004] The above-mentioned patent has the following problems: the exterior of the lithium battery is not protected and the lithium battery is easily damaged after being impacted; the heat dissipation efficiency of the lithium battery is low and excessive temperature can easily cause the lithium battery to bulge, and in severe cases, the lithium battery may explode. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides an explosion-proof lithium battery with pressure relief, which has the characteristics of protecting the lithium battery and dissipating the heat of the lithium battery.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof lithium battery with pressure relief, comprising a lithium battery body, a protective component is arranged on the outside of the lithium battery body, a heat dissipation component is arranged below the lithium battery body, poles are arranged on both sides of the upper part of the lithium battery body, a pressure relief device is arranged in the upper middle part of the lithium battery body, a liquid injection hole is arranged on one side of the pressure relief device, and a controller is arranged on the other side of the pressure relief device.

[0007] Preferably, the protective component includes a sealing cover, a protective shell, a dehumidification component, an L-shaped fixing block and a buffer pad, wherein a protective shell is provided on the outside of the lithium battery body, a dehumidification component is provided on the inner wall of the protective shell, a sealing cover is provided above the protective shell, an L-shaped fixing block is provided below the sealing cover and inside the protective shell, and a buffer pad is provided on the surface of the L-shaped fixing block.

[0008] Preferably, the dehumidification assembly includes a cover plate, a slider, a dehumidification bag, a mesh cover and a dehumidification chamber, wherein the inner wall of the protective shell is provided with a mesh cover, the interior of the mesh cover is provided with a dehumidification chamber, the middle of the dehumidification chamber is provided with a dehumidification bag, the top of the dehumidification bag is provided with a cover plate, and sliders are provided on both sides of the cover plate.

[0009] Preferably, a plurality of groups of fixing bolts are provided on the surface of the sealing cover, and the sealing cover is arranged above the protective shell through the fixing bolts.

[0010] Preferably, a liquid storage cavity is provided inside the heat dissipation box, cooling blocks are provided on both sides of the liquid storage cavity, a semiconductor refrigeration plate is provided on one side of the cooling block, heat conduction fins are provided in the middle of the liquid storage cavity, a heat conduction block is provided above the heat conduction fins, a contact plate is provided above the heat conduction block, and a sealing gasket is provided at the connection between the heat conduction block and the heat dissipation box.

[0011] Preferably, a plurality of groups of heat-conducting fins are arranged below the heat-conducting block, and conductive silicone grease is applied between the semiconductor refrigeration sheet and the heat-conducting block.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides a protective component, and a protective shell and a sealing cover are provided on the outside of the lithium battery body, so as to protect the lithium battery body, extend the service life of the lithium battery body, improve the safety of the lithium battery body, and prevent the lithium battery body from being damaged after being hit. Since a dehumidification bag is provided inside the protective shell, the humidity inside the protective shell can be reduced, and the lithium battery body can be prevented from being damaged by moisture.

[0014] 2. The utility model sets a heat dissipation component, a contact plate is set below the lithium battery body, and a heat conduction block and a heat conduction fin are set below the contact plate, so that the heat generated by the lithium battery body during operation can be conducted into the liquid storage cavity. Since the liquid storage cavity is provided with a coolant, the conducted heat can be exchanged to reduce the temperature of the lithium battery body. Cooling blocks and semiconductor refrigeration sheets are set on both sides of the liquid storage cavity, so that the coolant can be quickly cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the protective component of the utility model;

[0017] Figure 3 This is a schematic diagram of the dehumidification component of the utility model;

[0018] Figure 4 This is a schematic diagram of the heat dissipation component of the utility model;

[0019] Figure 5 This is a cross-sectional view of the heat dissipation component of the utility model.

[0020] In the figure: 1. lithium battery body; 2. protection component; 21. sealing cover; 22. protection shell; 23. dehumidification component; 231. cover plate; 232. slider; 233. dehumidification bag; 234. mesh cover; 235. dehumidification chamber; 24. L-shaped fixing block; 25. buffer pad; 3. heat dissipation component; 31. heat dissipation box; 32. contact plate; 33. heat conduction block; 34. sealing pad; 35. heat conduction fin; 36. liquid storage chamber; 37. semiconductor refrigeration plate; 38. cooling block; 4. liquid injection hole; 5. pressure relief device; 6. controller; 7. pole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1-5 The utility model provides the following technical solutions: an explosion-proof lithium battery with pressure relief, comprising a lithium battery body 1, a protective component 2 is arranged on the outside of the lithium battery body 1, a heat dissipation component 3 is arranged below the lithium battery body 1, poles 7 are arranged on both sides of the upper part of the lithium battery body 1, a pressure relief device 5 is arranged in the upper middle part of the lithium battery body 1, a liquid injection hole 4 is arranged on one side of the pressure relief device 5, and a controller 6 is arranged on the other side of the pressure relief device 5.

[0024] Specifically, the protective component 2 includes a sealing cover 21, a protective shell 22, a dehumidification component 23, an L-shaped fixing block 24 and a buffer pad 25, wherein a protective shell 22 is arranged on the outside of the lithium battery body 1, a dehumidification component 23 is arranged on the inner wall of the protective shell 22, a sealing cover 21 is arranged above the protective shell 22, an L-shaped fixing block 24 is arranged below the sealing cover 21 and inside the protective shell 22, and a buffer pad 25 is arranged on the surface of the L-shaped fixing block 24.

[0025] By adopting the above technical solution, a protective shell 22 is provided on the outside of the lithium battery body 1, and a sealing cover 21 is provided on the top of the protective shell 22, so that the lithium battery body 1 can be protected, the service life of the lithium battery body 1 is extended, the safety of the lithium battery body 1 is improved, and the lithium battery body 1 is prevented from being damaged after being impacted. An L-shaped fixing block 24 is provided below the sealing cover 21 and inside the protective shell 22, and a buffer pad 25 is provided on the surface of the L-shaped fixing block 24, so as to prevent the lithium battery body 1 from shaking in the protective shell 22.

[0026] Specifically, the dehumidification component 23 includes a cover plate 231, a slider 232, a dehumidification bag 233, a mesh cover 234 and a dehumidification chamber 235, wherein the inner wall of the protective shell 22 is provided with a mesh cover 234, the interior of the mesh cover 234 is provided with a dehumidification chamber 235, the middle of the dehumidification chamber 235 is provided with a dehumidification bag 233, the upper part of the dehumidification bag 233 is provided with a cover plate 231, and sliders 232 are provided on both sides of the cover plate 231.

[0027] By adopting the above technical solution, the inner wall of the protective shell 22 is provided with a mesh cover 234, and the interior of the mesh cover 234 is provided with a dehumidification bag 233, so as to reduce the humidity inside the protective shell 22 and prevent the lithium battery body 1 from being damaged by moisture. A cover plate 231 is provided above the dehumidification bag 233, and sliders 232 are provided on both sides of the cover plate 231, so that the staff can replace the dehumidification bag 233.

[0028] Specifically, a plurality of sets of fixing bolts are disposed on the surface of the sealing cover 21 , and the sealing cover 21 is disposed above the protective shell 22 through the fixing bolts.

[0029] By adopting the above technical solution, a plurality of sets of fixing bolts are arranged on the surface of the sealing cover 21 , and the sealing cover 21 is arranged above the protective shell 22 through the fixing bolts, so that it is convenient for the staff to disassemble and install the sealing cover 21 .

[0030] When the present embodiment is used, a protective shell 22 is disposed outside the lithium battery body 1, and a sealing cover 21 is disposed above the protective shell 22, so as to protect the lithium battery body 1, prolong the service life of the lithium battery body 1, improve the safety of the lithium battery body 1, and prevent the lithium battery body 1 from being damaged after being hit. An L-shaped fixing block 24 is disposed below the sealing cover 21 and inside the protective shell 22, and a buffer pad 25 is disposed on the surface of the L-shaped fixing block 24, so as to prevent the lithium battery body 1 from shaking in the protective shell 22. The inner wall is provided with a mesh cover 234, and a dehumidification bag 233 is provided inside the mesh cover 234, so as to reduce the humidity inside the protective shell 22 and prevent the lithium battery body 1 from being damaged by moisture. A cover plate 231 is provided above the dehumidification bag 233, and sliders 232 are provided on both sides of the cover plate 231, so that the staff can replace the dehumidification bag 233. A plurality of sets of fixing bolts are provided on the surface of the sealing cover 21, and the sealing cover 21 is arranged above the protective shell 22 through the fixing bolts, so as to facilitate the staff to disassemble and install the sealing cover 21.

[0031] Example 2

[0032] The present embodiment is different from the embodiment 1 in that: specifically, the heat dissipation assembly 3 includes a heat dissipation box 31, a contact plate 32, a heat conductive block 33, a sealing gasket 34, a heat conductive fin 35, a liquid storage cavity 36, a semiconductor cooling sheet 37 and a cold block 38, wherein a heat dissipation box 31 is arranged below the lithium battery body 1, a liquid storage cavity 36 is arranged inside the heat dissipation box 31, cold blocks 38 are arranged on both sides of the liquid storage cavity 36, a semiconductor cooling sheet 37 is arranged on one side of the cold block 38, a heat conductive fin 35 is arranged in the middle of the liquid storage cavity 36, a heat conductive block 33 is arranged above the heat conductive fin 35, a contact plate 32 is arranged above the heat conductive block 33, and a sealing gasket 34 is arranged at the connection between the heat conductive block 33 and the heat dissipation box 31.

[0033] By adopting the above technical scheme, a contact plate 32 and a heat conductive block 33 are provided below the lithium battery body 1, so that the heat generated by the lithium battery body 1 during operation can be conducted. Since a heat conductive fin 35 is provided below the heat conductive block 33, the heat can be conducted into the liquid storage chamber 36. The liquid storage chamber 36 is provided with a coolant, so that the conducted heat can be exchanged to reduce the temperature of the lithium battery body 1. Since the coolant blocks 38 and the semiconductor refrigeration sheets 37 are provided on both sides of the liquid storage chamber 36, the coolant can be quickly cooled.

[0034] Specifically, a plurality of groups of heat-conducting fins 35 are arranged below the heat-conducting block 33 , and conductive silicone grease is applied between the semiconductor cooling sheet 37 and the heat-conducting block 38 .

[0035] By adopting the above technical solution, a plurality of groups of heat-conducting fins 35 are arranged under the heat-conducting block 33, thereby improving the heat exchange efficiency. Conductive silicone grease is applied between the semiconductor cooling sheet 37 and the cold-conducting block 38, thereby improving the cooling efficiency.

[0036] When this embodiment is used, a contact plate 32 and a heat-conducting block 33 are provided below the lithium battery body 1, so that the heat generated by the lithium battery body 1 during operation can be conducted. Since a heat-conducting fin 35 is provided below the heat-conducting block 33, the heat can be conducted into the liquid storage cavity 36. The liquid storage cavity 36 is provided with a coolant, so that the conducted heat can be exchanged to reduce the temperature of the lithium battery body 1. Since a coolant block 38 and a semiconductor cooling sheet 37 are provided on both sides of the liquid storage cavity 36, the coolant can be quickly cooled. Several groups of heat-conducting fins 35 are provided below the heat-conducting block 33, so that the heat exchange efficiency can be improved. Conductive silicone grease is applied between the semiconductor cooling sheet 37 and the coolant block 38, so that the cooling efficiency can be improved.

[0037] The semiconductor cooling sheet 37 in the present invention is an existing disclosed technology, and the selected model is TEC1-12706.

[0038] The structure and use principle of the pressure relief device 5 and the controller 6 in the utility model have been disclosed in a lithium battery structure capable of automatically exhausting and relieving pressure, which is disclosed in Chinese Patent Publication No. CN215377620U.

[0039] Working principle and use process of the utility model: When the utility model is in use, it is used for lithium battery protection of explosion-proof lithium batteries with pressure relief. When working, the lithium battery body 1 needs to be protected. A protective shell 22 is arranged on the outside of the lithium battery body 1, and a sealing cover 21 is arranged on the top of the protective shell 22, so that the lithium battery body 1 can be protected, the service life of the lithium battery body 1 is extended, the safety of the lithium battery body 1 is improved, and the lithium battery body 1 is prevented from being damaged after being hit. An L-shaped fixing block 24 is arranged below the sealing cover 21 and inside the protective shell 22, and a buffer pad 25 is arranged on the surface of the L-shaped fixing block 24, so that To prevent the lithium battery body 1 from shaking in the protective shell 22, a mesh cover 234 is provided on the inner wall of the protective shell 22, and a dehumidification bag 233 is provided inside the mesh cover 234, so that the humidity inside the protective shell 22 can be reduced to prevent the lithium battery body 1 from being damaged by moisture. A cover plate 231 is provided above the dehumidification bag 233, and sliders 232 are provided on both sides of the cover plate 231, so that the staff can replace the dehumidification bag 233. A plurality of sets of fixing bolts are provided on the surface of the sealing cover 21, and the sealing cover 21 is arranged above the protective shell 22 through the fixing bolts, so that the staff can easily disassemble and install the sealing cover 21;

[0040] When in use, it is used for heat dissipation of lithium batteries of explosion-proof lithium batteries with pressure relief. When working, the lithium battery body 1 needs to be cooled. A contact plate 32 and a heat conductive block 33 are arranged below the lithium battery body 1, so that the heat generated by the lithium battery body 1 during operation can be conducted. Since heat conductive fins 35 are arranged below the heat conductive block 33, the heat can be conducted into the liquid storage cavity 36. The liquid storage cavity 36 is provided with coolant, so that the conducted heat can be exchanged to reduce the temperature of the lithium battery body 1. Since coolant blocks 38 and semiconductor cooling sheets 37 are arranged on both sides of the liquid storage cavity 36, the coolant can be quickly cooled. Several groups of heat conductive fins 35 are arranged below the heat conductive block 33, so as to improve the heat exchange efficiency. Conductive silicone grease is applied between the semiconductor cooling sheet 37 and the coolant block 38, so as to improve the cooling efficiency.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof lithium battery with pressure relief, comprising a lithium battery body, characterized in that: A protective component is arranged on the outside of the lithium battery body, a heat dissipation component is arranged below the lithium battery body, poles are arranged on both sides above the lithium battery body, a pressure relief device is arranged in the upper middle part of the lithium battery body, a liquid injection hole is arranged on one side of the pressure relief device, and a controller is arranged on the other side of the pressure relief device.

2. The explosion-proof lithium battery with pressure relief according to claim 1, characterized in that: The protective component includes a sealing cover, a protective shell, a dehumidification component, an L-shaped fixing block and a buffer pad, wherein a protective shell is arranged on the outside of the lithium battery body, a dehumidification component is arranged on the inner wall of the protective shell, a sealing cover is arranged on the top of the protective shell, an L-shaped fixing block is arranged below the sealing cover and inside the protective shell, and a buffer pad is arranged on the surface of the L-shaped fixing block.

3. The explosion-proof lithium battery with pressure relief according to claim 2, characterized in that: The dehumidification component includes a cover plate, a slider, a dehumidification bag, a mesh cover and a dehumidification chamber, wherein the inner wall of the protective shell is provided with a mesh cover, the interior of the mesh cover is provided with a dehumidification chamber, the middle of the dehumidification chamber is provided with a dehumidification bag, the top of the dehumidification bag is provided with a cover plate, and sliders are provided on both sides of the cover plate.

4. The explosion-proof lithium battery with pressure relief according to claim 2, characterized in that: A plurality of sets of fixing bolts are arranged on the surface of the sealing cover, and the sealing cover is arranged above the protective shell through the fixing bolts.

5. The explosion-proof lithium battery with pressure relief according to claim 1, characterized in that: The heat dissipation assembly includes a heat dissipation box, a contact plate, a heat conductive block, a sealing gasket, heat conductive fins, a liquid storage cavity, a semiconductor cooling sheet and a cooling block, wherein a heat dissipation box is arranged below the lithium battery body, a liquid storage cavity is arranged inside the heat dissipation box, cooling blocks are arranged on both sides of the liquid storage cavity, a semiconductor cooling sheet is arranged on one side of the cooling block, a heat conductive fin is arranged in the middle of the liquid storage cavity, a heat conductive block is arranged above the heat conductive fins, a contact plate is arranged above the heat conductive block, and a sealing gasket is arranged at the connection between the heat conductive block and the heat dissipation box.

6. The explosion-proof lithium battery with pressure relief according to claim 5, characterized in that: A plurality of groups of heat-conducting fins are arranged below the heat-conducting block, and conductive silicone grease is applied between the semiconductor refrigeration sheet and the heat-conducting block.

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