CN205388172U - One -way relief valve and contain battery of this relief valve - Google Patents

Abstract

The utility model belongs to the technical field of batteries, and in particular relates to a one-way safety valve, comprising a valve housing, an air intake passage, an air outlet passage, a piston and an elastic member, and both the air intake passage and the air outlet passage are arranged on the valve housing , a chamber is provided inside the valve casing, the outlet channel communicates with the chamber, the piston is disposed in the chamber, and the elastic member exerts pressure on the piston so that the piston closes the The air intake channel is provided with a gas purification device. The utility model can be used on products that need to discharge internal pressure gas, and can purify the internal pressure gas at the same time. The utility model is especially suitable for installing battery products. In addition, the utility model also discloses a battery including the above-mentioned one-way safety valve.

Description

One-way safety valve and battery including the safety valve

technical field

The utility model belongs to the technical field of batteries, in particular to a one-way safety valve and a battery including the safety valve.

Background technique

With the development of social production and science and technology, especially the rapid development of 3C electronics industry, rocket technology, space research, aerospace development, and energy utilization in recent years, lithium batteries have been widely used in such products with excellent performance. And in recent years, it has gradually developed into other product application fields.

However, the safety of lithium batteries becomes the key. If the battery is overheated, the carbonate in the electrolyte will be oxidized and reduced, generating a large amount of gas and more heat, and the internal pressure of the battery will rise sharply and cause an explosion. In order to prevent explosion, the battery casing shell has at least one opening, and the opening is sealed by a cover, and an explosion-proof pop-up safety valve is arranged on the cover. However, the existing safety valves all have the following defects: the gas discharged from the battery cannot be purified while being explosion-proof.

Utility model content

One of the purposes of this utility model is to provide a one-way safety valve for the deficiencies of the prior art. The one-way safety valve can be used on products that need to discharge internal pressure gas, and can purify the internal pressure gas at the same time. deal with.

In order to achieve the above object, the utility model adopts the following technical solutions:

A one-way safety valve, comprising a valve casing, an air inlet passage, an air outlet passage, a piston and an elastic member, the inlet passage and the air outlet passage are both arranged in the valve casing, and a chamber is arranged inside the valve casing , the outlet channel communicates with the chamber, the piston is arranged in the chamber, the elastic member exerts pressure on the piston, so that the piston closes the inlet channel, and the inside of the inlet channel A gas purification device is provided. The one-way safety valve can be used on products that need to discharge internal pressure gas, and can purify the internal pressure gas at the same time. The one-way safety valve is especially suitable for installing battery products.

As an improvement of the one-way safety valve described in the utility model, the gas purification device includes activated carbon, filter cotton and adsorption membrane.

As an improvement of the one-way safety valve described in the present invention, the elastic member includes a spring and rubber.

As an improvement of the one-way safety valve described in the utility model, the valve casing further includes a sealing plate, and the sealing plate is arranged on the top of the piston.

As an improvement of the one-way safety valve described in the present utility model, the piston includes a contact part and a movable part integrally connected with the contact part, the elastic member is sleeved on the movable part, and the elastic One end of the member abuts against the sealing plate, and the other end of the elastic member abuts against the contact portion.

As an improvement of the one-way safety valve described in the present utility model, the piston includes a contact part, a movable part and a protruding part, the protruding part is connected with the contact part through the movable part, and the sealing plate A protruding hole is provided, the protruding part protrudes from the protruding hole, the elastic member is sleeved on the movable part, one end of the elastic member is against the sealing plate, and the other end of the elastic member One end is against the contact portion.

As an improvement of the one-way safety valve described in the utility model, the surface of the protruding part is provided with a scale.

As an improvement of the one-way safety valve described in the present utility model, the sum h of the thicknesses of the contact part and the movable part is smaller than the cavity distance d of the cavity.

As an improvement of the one-way safety valve described in the present utility model, the inner wall of the valve housing is provided with a step, and the step is matched with the contact portion.

Another object of the present utility model is to provide a battery, including a top cover, and the above-mentioned one-way safety valve is arranged on the top cover. When the above-mentioned battery is working, after the internal air pressure increases to a certain level, the air pressure will enter the chamber from the air intake channel and push the piston up, so that the air intake channel is connected with the air outlet channel, and then the excess gas inside the battery will be released from the air outlet channel. Exhaust, because a gas purification device is installed in the outlet channel, so as to realize the purification treatment of the exhaust gas.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present utility model.

Fig. 2 is a schematic structural view of Embodiment 2 of the present utility model.

Fig. 3 is a schematic structural view of Embodiment 3 of the present invention.

Among them: 1-valve housing, 11-chamber, 12-intake channel, 13-step; 2-outlet channel, 21-gas purification device; 3-piston, 31-contact part, 32-moving part, 33-extension Outlet; 4-elastic member; 5-sealing plate, 51-extrusion hole; 6-top cover.

detailed description

The utility model will be further described in detail below in conjunction with the specific implementation and the accompanying drawings, but the implementation of the utility model is not limited thereto.

Specific implementation mode 1

Please refer to Figure 1, a one-way safety valve, including a valve housing 1, an air inlet passage 12, an air outlet passage 2, a piston 3 and an elastic member 4, the inlet passage 12 and the air outlet passage 2 are all arranged on the valve housing 1, the valve housing 1. There is a chamber 11 inside, and the air outlet channel 2 communicates with the chamber 11. The piston 3 is set in the chamber 11. The elastic member 4 exerts pressure on the piston 3, so that the piston 3 closes the intake channel 12, and the intake channel 12 is set There is a gas cleaning device 21 . The gas purification device 21 is set as activated carbon, which can play a very good role in air purification. The elastic member 4 is set as a spring, because the spring belongs to a general elastic member with low manufacturing cost and good use effect.

Preferably, the valve casing 1 further includes a sealing plate 5 disposed on the top of the piston 3 . The piston 3 includes a contact part 31 and a movable part 32 integrally connected with the contact part 31. The elastic member 4 is sleeved on the movable part 32. One end of the elastic member 4 is against the sealing plate 5, and the other end of the elastic member 4 is against the contact part. 31. The inner wall of the valve casing 1 is provided with a step 13, and the step 13 is in contact with the contact part 31. When the contact part 31 moves upward and does not contact the step 13, the connection between the air inlet passage 12 and the air outlet passage 2 is released, and the contact with the single air passage is released. The internal pressure of the product connected to the safety valve.

Preferably, the sum h of the thicknesses of the contact portion 31 and the movable portion 32 is smaller than the cavity distance d of the chamber 11 , so that the movable portion 32 can move up and down in the chamber 11 . In addition, in this embodiment, the entire structure of the piston 3 is set as a "T"-shaped structure, which is beneficial to the installation of the elastic member 4 and the realization of the working principle of the utility model.

Specific implementation mode 2

Please refer to Fig. 2, and specific embodiment 1 difference is: the piston 3 of this embodiment comprises contact part 31, movable part 32 and protruding part 33, and protruding part 33 is connected with contact part 31 through movable part 32, and sealing plate 5 A protruding hole 51 is provided, the protruding part 33 protrudes from the protruding hole 51, the elastic member 4 is sleeved on the movable part 32, one end of the elastic member 4 is against the sealing plate 5, and the other end of the elastic member 4 is against the contact part 31. The surface of the extension part 33 is provided with a scale (not shown in the figure), the setting of the scale can observe the movement amount of the extension part 33, and the pressure inside the product can be monitored by observing the scale of the extension part 33. The calculation of the movement amount of the extension part 33 can also be calculated by using an auxiliary tool such as a laser displacement sensor or other sensors, so as to improve the accuracy of the calculation of the movement amount of the extension part 33 .

The gas purification device 21 of this embodiment is set as a filter cotton or an adsorption membrane, both of which can perform the same function of purifying air as activated carbon. The elastic member 4 is set as rubber, because rubber also has a certain contraction function, and can play the same role as a spring. In addition, the piston 3 and the elastic member 4 can also be made into a rubber plug with an integrated structure (that is to say: the elastic member 4 is removed, and the piston 3 is directly made into a rubber material), which can also play the role of "piston 3 + elastic member 4". Combined role.

Other structures are the same as those in Embodiment 1, and will not be repeated here.

Specific implementation mode 3

Please refer to Figures 1 to 3, a battery includes a top cover 6, and the top cover 6 is provided with the one-way safety valve of the specific embodiment 1 or 2. By applying the one-way safety valve to the battery, it can be protected against explosions at the same time. Purify the gas discharged from the battery (because the above-mentioned one-way safety valve is provided with a gas purification device 21).

In addition, the air outlet channel 2 of this embodiment is arranged on the side of the valve casing 1, compared with the top, the height of the valve casing 1 can be reduced. When the above-mentioned one-way safety valve is applied to the battery, it reduces The overall height of the battery is conducive to the development of the battery in the direction of thinner and smaller.

When the internal air pressure of the battery is -0.1~0.35MPa, as the internal pressure of the battery changes, the amount of compression of the elastic member 4 will change accordingly, thereby driving the piston 3 (the piston in the specific embodiment 2) to move in the vertical direction. Change, the pressure value inside the battery can be calculated by observing the displacement change of the protruding part 33; when the internal pressure of the battery reaches 0.35MPa, the internal pressure of the battery will drive the piston 3 to move up to the critical position, and the excess gas inside the battery will Enter the chamber 11 of the one-way safety valve, and then discharge through the outlet channel 2. Because the activated carbon 21 is placed in the outlet channel 2, the activated carbon 21 can purify the discharged gas to avoid potential harm to the human body.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also make appropriate changes and modifications to the above embodiment. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (10)

1. an one-way relief valves, it is characterized in that: include valve shell, inlet channel, outlet passageway, piston and elastic component, described inlet channel and described outlet passageway may be contained within described valve shell, described valve shell is internally provided with chamber, described outlet passageway and described chamber, described piston is arranged in described chamber, and described piston is applied pressure by described elastic component, make inlet channel described in described piston closes, in described inlet channel, be provided with gas cleaning plant.

2. one-way relief valves according to claim 1, it is characterised in that: described gas cleaning plant includes activated carbon, filter cotton and adsorbed film.

3. one-way relief valves according to claim 1, it is characterised in that: described elastic component includes spring and rubber.

4. one-way relief valves according to claim 1, it is characterised in that: described valve shell also includes sealing plate, and described sealing plate is arranged on the top of described piston.

5. one-way relief valves according to claim 4, it is characterized in that: described piston includes contact site and the movable part connected as one with described contact site, described elastic component is sheathed on described movable part, one end of described elastic component props up described sealing plate, and the other end of described elastic component props up described contact site.

6. one-way relief valves according to claim 4, it is characterized in that: described piston includes contact site, movable part and extension, described extension is connected with described contact site by described movable part, described sealing plate is provided with and stretches out hole, described extension stretches out hole described in stretching out in, described elastic component is sheathed on described movable part, and one end of described elastic component props up described sealing plate, and the other end of described elastic component props up described contact site.

7. one-way relief valves according to claim 6, it is characterised in that: the surface configuration of described extension has scale.

8. the one-way relief valves according to claim 5 or 6, it is characterised in that: the thickness sum h of described contact site and described movable part less than the chamber of described chamber from d.

9. the one-way relief valves according to claim 5 or 6, it is characterised in that: the inwall of described valve shell is provided with step, and described step contacts with the cooperation of described contact site.

10. a battery, it is characterised in that: include top cover, described top cover is provided with the one-way relief valves described in any one of claim 1 ~ 9.