Lithium battery with pressure release valve

Abstract

The utility model discloses a lithium battery with a pressure relief valve, which relates to the technical field of lithium batteries and comprises a shell and a pressure relief component, mounting plates are arranged between the top end and the bottom end in the shell, a lithium battery core is mounted between the two mounting plates, the pressure relief component is arranged on the left side in the shell, and the pressure relief valve is arranged in the shell. And the pressure relief assembly comprises a sliding rod, a sliding block, a connecting rod, a moving plate, a reset spring, a piston rod, an air cylinder, a one-way air inlet pipe, a one-way air outlet pipe, a pressure relief channel and a pressure relief valve, the sliding block is slidably arranged outside the sliding rod, and the right side of the sliding block is connected with the connecting rod through a rotating shaft. According to the lithium battery with the pressure release valve, when gas expansion occurs in the shell, a movable plate can overcome rebound of a reset spring to perform transverse displacement and cause a connecting rod to rotate, so that a sliding block is driven by the connecting rod to perform longitudinal displacement on a sliding rod, and two piston rods moving oppositely are pushed into corresponding air cylinders until cold air is injected into the shell; the temperature in the shell is prevented from reaching an ignition point.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery with a pressure relief valve. Background Art

[0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. With the development of science and technology, lithium batteries have now become mainstream. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements.

[0003] For example, the utility model with application number CN201821799128.9 discloses a high-stability lithium battery pack with a pressure relief valve. The utility model is provided with a housing fixing pin and reinforcing ribs, which can ensure that the lithium battery pack is firmly installed in other devices. At the same time, the reinforcing ribs can effectively strengthen the housing, ensure the firmness and reliability of the housing, and greatly improve its reliability and service life. However, it is not possible to combine the pressure relief structure and the cooling structure through structural improvements, and the battery is in a hot environment for a long time, which affects the battery operation.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a lithium battery with a pressure relief valve is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a lithium battery with a pressure relief valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lithium battery with a pressure relief valve, comprising a shell and a pressure relief assembly, a mounting plate is arranged between the top and bottom ends of the shell, a lithium battery core is installed between the two mounting plates, the pressure relief assembly is arranged on the left side of the shell, and the pressure relief assembly comprises a sliding rod, a slider, a connecting rod, a movable plate, a return spring, a piston rod, an air cylinder, a one-way air inlet pipe, a one-way air outlet pipe, a pressure relief channel and a pressure relief valve, a sliding rod is slidingly arranged on the outside of the sliding rod, and the right side of the sliding rod is connected to the connecting rod through a rotating shaft, the other end of the connecting rod is connected to the movable plate through a rotating shaft, the return spring is sleeved on the outside of the sliding rod, a piston rod is arranged at the front end of the sliding rod, and an air cylinder is arranged on the outside of the piston rod, the input end of the air cylinder is connected to the one-way air inlet pipe, and the output end of the air cylinder is connected to the one-way air outlet pipe, the top and bottom ends of the shell are installed with a pressure relief valve, and the input end of the pressure relief valve is provided with a pressure relief channel.

[0007] Furthermore, a shell cover is arranged on the right side of the shell, and a pin is rotatably arranged inside the shell cover.

[0008] Furthermore, the outside of the pin is connected with a hook, and the inside of the shell cover is also equipped with a torsion spring.

[0009] Furthermore, a return spring is connected between the two sliders, and the sliders, piston rods and air cylinders are provided in the same number.

[0010] Furthermore, the air cylinder is arranged at the front end of the left side inside the shell, and the sliding rod and the piston rod are parallel to each other.

[0011] Furthermore, the air cylinder is communicated with the shell through a one-way air outlet pipe, and the shell is communicated with the pressure relief valve through a pressure relief channel.

[0012] Furthermore, the movable plate and the mounting plate are parallel to each other, and the area of ​​the movable plate is larger than the area of ​​the mounting plate.

[0013] The utility model provides a lithium battery with a pressure relief valve, which has the following beneficial effects:

[0014] 1. When gas expansion occurs inside the shell of the utility model, the movable plate will overcome the rebound of the return spring to move laterally, causing the connecting rod to rotate, and then drive the slider to move longitudinally on the slide rod through the connecting rod, so that the two piston rods moving in opposite directions are pushed into the corresponding air cylinder until the cold air is injected into the shell, thereby preventing the temperature inside the shell from reaching the ignition point.

[0015] 2. The utility model presses the upper hook and lifts the lower hook at the same time, so that the hook can be retracted into the shell cover and then closed on the right side of the shell body. When the shell cover and the shell body are tightly fitted, the elastic force of the torsion spring pushes the hook deeper into the top and bottom grooves of the shell body, so that the shell cover and the shell body are connected to prevent the shell cover and the shell body from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a shell of a lithium battery with a pressure relief valve according to the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of a shell and a shell cover of a lithium battery with a pressure relief valve according to the utility model;

[0018] Figure 3 The utility model is a lithium battery with a pressure relief valve Figure 2 Enlarged structural diagram at A in the middle.

[0019] In the figure: 1. shell; 2. shell cover; 3. pin shaft; 4. hook; 5. torsion spring; 6. lithium battery core; 7. pressure relief assembly; 701. slide bar; 702. slide block; 703. connecting rod; 704. moving plate; 705. return spring; 706. piston rod; 707. air cylinder; 708. one-way air inlet pipe; 709. one-way air outlet pipe; 710. pressure relief channel; 711. pressure relief valve; 8. mounting plate. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] like Figure 1 and Figure 2 As shown, a lithium battery with a pressure relief valve comprises a shell 1 and a pressure relief assembly 7, a mounting plate 8 is arranged between the top and bottom ends of the shell 1, a lithium battery core 6 is installed between the two mounting plates 8, the pressure relief assembly 7 is arranged on the left side of the shell 1, and the pressure relief assembly 7 comprises a slide bar 701, a slider 702, a connecting rod 703, a movable plate 704, a return spring 705, a piston rod 706, an air cylinder 707, a one-way air inlet pipe 708, a one-way air outlet pipe 709, a pressure relief channel 710 and a pressure relief valve 711, a slide bar 702 is slidably arranged on the outside of the slide bar 701, and the right side of the slide bar 702 is connected to the connecting rod 703 through a rotating shaft, and the other end of the connecting rod 703 is connected to the movable plate 704 through a rotating shaft, the return spring 705 is sleeved on the outside of the slide bar 701, and the front end of the slide bar 702 is provided with a piston rod 706, A gas cylinder 707 is arranged on the outside of the piston rod 706, the input end of the gas cylinder 707 is connected to a one-way air inlet pipe 708, and the output end of the gas cylinder 707 is connected to a one-way air outlet pipe 709, a pressure relief valve 711 is installed at the top and bottom ends of the shell 1, and a pressure relief channel 710 is arranged at the input end of the pressure relief valve 711, a return spring 705 is connected between the two sliders 702, the sliders 702, the piston rod 706 and the gas cylinder 707 are arranged in the same number, the gas cylinder 707 is arranged at the front end of the left side of the inside of the shell 1, and the slide rod 701 and the piston rod 706 are parallel to each other, the gas cylinder 707 is communicated with the shell 1 through the one-way air outlet pipe 709, and the shell 1 is communicated with the pressure relief valve 711 through the pressure relief channel 710, the movable plate 704 and the mounting plate 8 are parallel to each other, and the area of ​​the movable plate 704 is larger than the area of ​​the mounting plate 8.

[0022] The specific operation is as follows: when gas expansion occurs inside the shell 1, the movable plate 704 will overcome the rebound of the return spring 705 to move laterally, causing the connecting rod 703 to rotate, and then the slider 702 is driven to move longitudinally on the slide rod 701 through the connecting rod 703, so that the two piston rods 706 moving in opposite directions are pushed into the corresponding air cylinder 707 until the cold air is injected into the shell 1, thereby preventing the internal temperature of the shell 1 from reaching the ignition point.

[0023] like Figure 1 and Figure 3 As shown, a shell cover 2 is arranged on the right side of the shell 1 , and a pin shaft 3 is rotatably arranged inside the shell cover 2 , a hook 4 is connected to the outside of the pin shaft 3 , and a torsion spring 5 is also installed inside the shell cover 2 .

[0024] The specific operation is as follows: press the upper hook 4 and lift the lower hook 4 at the same time, so that the hook 4 can be retracted into the shell cover 2 and then the shell cover 2 can be closed on the right side of the shell body 1. When the shell cover 2 and the shell body 1 are tightly fitted, the elastic force of the torsion spring 5 itself pushes the hook 4 into the top and bottom grooves of the shell body 1, so that the shell cover 2 and the shell body 1 can be connected to prevent the shell cover 2 and the shell body 1 from loosening.

[0025] In summary, when using the lithium battery with a pressure relief valve, firstly, the lithium battery core 6 is arranged and installed between the two mounting plates 8, and then the upper hook 4 is pressed and the lower hook 4 is lifted respectively, so that the upper and lower hooks 4 are simultaneously retracted into the shell cover 2, and the shell cover 2 is closed on the right side of the shell 1 and then the hands are released, and the hook 4 is pushed deeper into the top and bottom slots of the shell 1 by the elastic force of the torsion spring 5, so that the shell cover 2 and the shell 1 are connected to prevent the shell cover 2 and the shell 1 from being loosened;

[0026] When gas expands inside the housing 1 during the charging process of the lithium battery, the movable plate 704 will overcome the rebound of the return spring 705 and move laterally, so that the end of the pressure relief channel 710 away from the pressure relief valve 711 is exposed and communicated with the inside of the housing 1. At this time, the gas enters the pressure relief channel 710 and impacts the pressure relief valve 711. The pressure relief valve 711 opens to discharge excess gas, thereby reducing the air pressure inside the housing 1.

[0027] At the same time, the lateral displacement of the moving plate 704 will cause the connecting rod 703 to rotate, and then the connecting rod 703 will drive the slider 702 to move longitudinally on the slide rod 701, so that the two piston rods 706 moving in opposite directions are pushed into the corresponding air cylinder 707 until the cold air is injected into the shell 1 through the one-way air outlet pipe 709, so as to prevent the temperature inside the shell 1 from reaching the ignition point;

[0028] Since the one-way air inlet pipe 708 is connected to an external air source (the one-way air inlet pipe 708 and the one-way air outlet pipe 709 are respectively provided with a one-way air inlet valve and a one-way air outlet valve), when the pressure relief inside the shell 1 is completed and the moving plate 704 is affected by the rebound of the return spring 705 to move horizontally, a negative pressure can be generated inside the air cylinder 707 under the action of the piston rod 706, that is, fresh cold air is replenished into the air cylinder 707, thereby ensuring the use effect of the cooling function.

[0029] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A lithium battery with a pressure relief valve, comprising a housing (1) and a pressure relief assembly (7), characterized in that: A mounting plate (8) is arranged between the top and bottom ends of the shell (1), a lithium battery cell (6) is installed between the two mounting plates (8), the pressure relief assembly (7) is arranged on the left side of the inside of the shell (1), and the pressure relief assembly (7) comprises a slide bar (701), a slider (702), a connecting rod (703), a movable plate (704), a return spring (705), a piston rod (706), an air cylinder (707), a one-way air inlet pipe (708), a one-way air outlet pipe (709), a pressure relief channel (710) and a pressure relief valve (711), the slide bar (701) is slidably arranged on the outside of the slide bar (701), and the right side of the slider (702) A connecting rod (703) is connected via a rotating shaft, and the other end of the connecting rod (703) is connected to a movable plate (704) via a rotating shaft. The return spring (705) is sleeved on the outside of the sliding rod (701). A piston rod (706) is provided at the front end of the sliding block (702), and an air cylinder (707) is provided on the outside of the piston rod (706). The input end of the air cylinder (707) is connected to a one-way air inlet pipe (708), and the output end of the air cylinder (707) is connected to a one-way air outlet pipe (709). A pressure relief valve (711) is installed at the top and bottom ends of the shell (1), and a pressure relief channel (710) is provided at the input end of the pressure relief valve (711).

2. A lithium battery with a pressure relief valve according to claim 1, characterized in that: A shell cover (2) is arranged on the right side of the shell body (1), and a pin shaft (3) is rotatably arranged inside the shell cover (2).

3. A lithium battery with a pressure relief valve according to claim 2, characterized in that: The outside of the pin shaft (3) is connected with a hook (4), and the inside of the shell cover (2) is also equipped with a torsion spring (5).

4. A lithium battery with a pressure relief valve according to claim 1, characterized in that: A return spring (705) is connected between the two sliders (702), and the sliders (702), piston rods (706) and air cylinders (707) are provided in the same number.

5. A lithium battery with a pressure relief valve according to claim 1, characterized in that: The air cylinder (707) is arranged at the front end of the left side inside the housing (1), and the slide rod (701) and the piston rod (706) are parallel to each other.

6. A lithium battery with a pressure relief valve according to claim 1, characterized in that: The air cylinder (707) is in communication with the housing (1) via a one-way air outlet pipe (709), and the housing (1) is in communication with the pressure relief valve (711) via a pressure relief channel (710).

7. A lithium battery with a pressure relief valve according to claim 1, characterized in that: The movable plate (704) and the mounting plate (8) are parallel to each other, and the area of ​​the movable plate (704) is larger than the area of ​​the mounting plate (8).

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