Lithium battery pack explosion-proof device and lithium battery device formed by same

Abstract

The lithium battery pack explosion-proof device is simple in structure and has an explosion-proof function, the lithium battery pack explosion-proof device comprises a shell used for containing a battery, a shell cover used for sealing the battery is arranged on the shell, a connecting device is arranged between the shell and the shell cover, and the connecting device is connected with the shell. A first explosion-proof layer is arranged in the shell and the shell cover at a position in contact with the battery, and a second explosion-proof layer is arranged on the surface of the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and particularly relates to an explosion-proof device for a lithium battery pack and a lithium battery device composed thereof. Background Art

[0002] With the wide application of various portable intelligent terminals, higher requirements are put forward for the energy density and capacity of lithium-ion batteries to meet the development needs in the directions of intelligence, multi-functionality, and high portability. However, when high-energy-density and large-capacity lithium batteries are used or dropped, it is possible to cause battery explosion and damage, bringing danger to user use.

[0003] To solve this problem, the present utility model is created. Summary of the Utility Model

[0004] Therefore, in view of the above problems, the present utility model provides an explosion-proof device for a lithium battery pack with a simple structure and explosion-proof function and a lithium battery device composed thereof.

[0005] To solve the above technical problems, the solution adopted by the present utility model is: an explosion-proof device for a lithium battery pack, including a housing for accommodating a battery, a housing cover provided on the housing for sealing the battery, a connecting device provided between the housing and the housing cover, a first explosion-proof layer provided at the position in contact with the battery inside the housing and the housing cover, and a second explosion-proof layer provided on the surface of the housing.

[0006] Further improvement is: the connecting device includes a connecting rod, a connecting channel is opened on the housing, the connecting rod passes through the connecting channel, and an anti-disengagement device for preventing the connecting rod from disengaging is provided on the housing.

[0007] Further improvement is: the anti-disengagement device includes a wedge-shaped block, a sliding channel is opened on the housing, the wedge-shaped block is slidably provided in the sliding channel and one end slides out of the sliding channel, a wedge-shaped opening is provided on the connecting rod to match the wedge-shaped block, the wedge-shaped block is clamped in the wedge-shaped opening, and a pushing member for pushing the wedge-shaped block into the wedge-shaped opening is provided in the sliding channel.

[0008] Further improvement is: an inclined surface for facilitating the pushing of the wedge-shaped block to penetrate is provided at the end of the connecting rod.

[0009] Further improvement is: the pushing member is: a spring.

[0010] Further improvement is: an insulating layer is provided on the first explosion-proof layer.

[0011] Further improvement is: a fire extinguishing channel is opened on the housing behind the first explosion-proof layer, a fire extinguishing ball is provided in the fire extinguishing channel, and a fire extinguishing agent is provided in the fire extinguishing ball.

[0012] Further improvement: The first explosion-proof layer is an explosion-proof net.

[0013] Further improvement: The second explosion-proof layer is an explosion-proof plate layer.

[0014] A lithium battery device includes a lithium battery and a housing for accommodating the battery. The lithium battery is disposed within the housing. The housing is provided with a housing cover for sealing the battery. A connecting device is provided between the housing and the housing cover. A first explosion-proof layer is provided at the position where the housing and the housing cover are in contact with the battery, and a second explosion-proof layer is provided on the surface of the housing.

[0015] By adopting the foregoing technical solution, the beneficial effects of the present utility model are as follows:

[0016] The structure is simple and has an explosion-proof function. The housing is provided with a first explosion-proof layer and a second explosion-proof layer, which can provide double explosion protection for the lithium battery and is beneficial to improving the safety of the lithium battery during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional view of an explosion-proof device for a lithium battery pack and a lithium battery device composed thereof according to an embodiment of the present utility model.

[0018] Figure 2 It is a schematic enlarged view of part A according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Refer to Figure 1-2 , what is disclosed in the embodiment of the present utility model is: A lithium battery device includes a lithium battery 1 and a housing 2 for accommodating the battery. The lithium battery 1 is disposed within the housing 2. The housing 2 is provided with a housing cover 3 for sealing the battery. A connecting device is provided between the housing 2 and the housing cover 3. A first explosion-proof layer 6 is provided at the position where the housing 2 and the housing cover 3 are in contact with the battery, and a second explosion-proof layer 4 is provided on the surface of the housing 2.

[0021] Specifically, the connecting device includes a connecting rod 7 and a wedge block 8. A connecting channel is formed on the housing 2. The connecting rod 7 passes through the connecting channel. A sliding channel 9 is formed on the housing 2. The wedge block 8 is slidably disposed within the sliding channel 9 and one end thereof slides out of the sliding channel 9. A wedge-shaped opening 11 is formed on the connecting rod 7 to match the wedge block 8. The wedge block 8 is clamped within the wedge-shaped opening 11. A spring 10 for pushing the wedge block 8 into the wedge-shaped opening 11 is provided within the sliding channel 9.

[0022] Preferably, the first explosion-proof layer 6 is an explosion-proof net.

[0023] Preferably, the second explosion-proof layer 4 is an explosion-proof plate layer.

[0024] Among them, when in use, the lithium battery 1 is placed into the housing 2, and then the connecting rod 7 on the housing cover 3 is inserted into the connecting channel. The connecting rod 7 pushes the wedge-shaped block 8 away, and then continues to be inserted to the bottom. Then the spring 10 returns to push the wedge-shaped block 8 into the wedge-shaped opening 11 for engagement, thereby positioning the housing cover 3. Then, the housing 2 is provided with a first explosion-proof layer 6 and a second explosion-proof layer 4, which can provide double explosion protection for the lithium battery 1, and is beneficial to improving the safety of using the lithium battery 1.

[0025] In order to enable the connecting rod 7 to be inserted into the connecting channel more smoothly, an inclined surface 12 facilitating the pushing of the wedge-shaped block 8 for insertion is provided at the end of the connecting rod 7.

[0026] In order to further improve the safety of using the lithium battery 1, an insulating layer 5 is provided on the first explosion-proof layer 6.

[0027] In order to further improve the safety of using the lithium battery 1 and reduce the explosion probability of the lithium battery 1, a fire extinguishing channel is provided on the housing 2 behind the first explosion-proof layer 6. A fire extinguishing ball 13 is provided in the fire extinguishing channel, and a fire extinguishing agent is provided in the fire extinguishing ball 13. Among them, when the lithium battery 1 catches fire, the fire extinguishing ball 13 breaks, and the fire extinguishing agent inside extinguishes the lithium battery 1, making it not easy for the lithium battery 1 to explode directly and improving the safety of use.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery explosion-proof device, characterized in that: The invention comprises a shell for accommodating a battery, the shell is provided with a shell cover for sealing the battery, a connecting device is provided between the shell and the shell cover, a first explosion-proof layer is provided inside the shell and the shell cover at a position in contact with the battery, and a second explosion-proof layer is provided on the surface of the shell.

2. The lithium battery pack explosion-proof device according to claim 1, characterized in that: The connecting device comprises a connecting rod, a connecting channel is provided on the shell, the connecting rod is passed through the connecting channel, and an anti-detachment device for preventing the connecting rod from detaching is provided on the shell.

3. The lithium battery pack explosion-proof device according to claim 2, characterized in that: The anti-slip device includes a wedge block, a sliding channel is provided on the shell, the wedge block is slidably arranged in the sliding channel and one end slides out of the sliding channel, a wedge opening is provided on the connecting rod for matching the wedge block, the wedge block is clamped in the wedge opening, and a pushing member for pushing the wedge block into the wedge opening is provided in the sliding channel.

4. The lithium battery pack explosion-proof device according to claim 3, characterized in that: The end of the connecting rod is provided with an inclined surface which is convenient for pushing open the wedge block and inserting it.

5. The lithium battery pack explosion-proof device according to claim 3, characterized in that: The pushing member is a spring.

6. The lithium battery pack explosion-proof device according to claim 1, characterized in that: An insulating layer is arranged on the first explosion-proof layer.

7. The lithium battery pack explosion-proof device according to claim 1, characterized in that: A fire extinguishing passage is provided on the shell body behind the first explosion-proof layer, a fire extinguishing ball is provided in the fire extinguishing passage, and a fire extinguishing agent is provided in the fire extinguishing ball.

8. The lithium battery pack explosion-proof device according to claim 1, characterized in that: The first explosion-proof layer is: an explosion-proof net.

9. The lithium battery pack explosion-proof device according to claim 1, characterized in that: The second explosion-proof layer is an explosion-proof board layer.

10. A lithium battery device, comprising a lithium battery, characterized in that: It also includes a shell for accommodating a battery, the lithium battery is arranged in the shell, the shell is provided with a shell cover for sealing the battery, a connecting device is provided between the shell and the shell cover, a first explosion-proof layer is provided in the shell and the shell cover at a position in contact with the battery, and a second explosion-proof layer is provided on the surface of the shell.

Images