CN213068039U - Square aluminum shell electricity core internal air pressure detection device - Google Patents

Abstract

The utility model discloses an inside atmospheric pressure detecting device of square aluminum hull electricity core belongs to electric core testing arrangement field, and the inside atmospheric pressure detecting device of square aluminum hull electricity core includes atmospheric pressure testing arrangement, sealed fixing device. The air pressure testing device is arranged above the top cover surface of the battery cell and is communicated with the interior of the battery cell through an explosion-proof valve which jacks up the battery cell so as to test the internal air pressure of the battery cell. The sealing and fixing device is used for sealing the joint of the air pressure testing device and the battery core, so that the air pressure testing device is communicated with the interior of the battery core in a sealing manner, and the sealing and fixing device is detachably connected with the battery core. The utility model discloses an inside atmospheric pressure detecting device of square aluminum hull electricity core has can convenient and fast and accurate advantage of measuring the inside atmospheric pressure of electricity core to need not to do extra processing to electric core before the test electricity core, reduce the cost of test, and then be convenient for provide data for electric core material lectotype and failure analysis.

Description

Square aluminum shell electricity core internal air pressure detection device

Technical Field

The utility model relates to an electricity core testing arrangement field especially relates to an inside atmospheric pressure detecting device of square aluminum hull electricity core.

Background

The lithium ion battery has the advantages of high voltage, high specific energy, more recycling times, long storage time and the like, is widely applied to portable electronic equipment, and is also applied to large and medium-sized electric equipment such as electric automobiles, electric bicycles, electric tools and the like, so that the requirements on the service performance and safety of the lithium ion battery are higher and higher. The electric core can cause the gas generation inside the electric core due to the side reaction of electric core materials, the decomposition of electrolyte and other reasons in the circulating process, so that the internal pressure of the electric core is increased, and the overlarge internal pressure of the electric core brings serious influence on the use safety. Therefore, the internal air pressure needs to be tested before the abnormal cell is disassembled and analyzed so as to provide data for cell material selection and failure analysis, and a device convenient for testing the internal air pressure of the cell is not available in the prior art.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that can not be convenient among the prior art test out the device of the inside atmospheric pressure of electric core, the utility model discloses the problem of selected solution lies in providing a square type aluminum hull electric core inside atmospheric pressure detecting device, has the advantage of measuring the inside atmospheric pressure value of electric core that can make things convenient for and be quick accurate to in order to provide data for electric core material lectotype and failure analysis.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a pair of inside atmospheric pressure detection device of square aluminum hull electricity core, include:

the air pressure testing device is arranged above the top cover surface of the battery cell and is communicated with the interior of the battery cell through an explosion-proof valve which jacks the battery cell so as to test the internal air pressure of the battery cell;

the sealing and fixing device is used for sealing the connection part of the air pressure testing device and the battery cell, so that the air pressure testing device is communicated with the interior of the battery cell in a sealing manner, and the sealing and fixing device is detachably connected with the battery cell.

Preferably, the seal fixing device comprises:

the fixing part acts on the electric core and is used for fixing the electric core and providing force required by the sealing and fixing device for sealing the connection part of the air pressure testing device and the electric core;

and the sealing part is arranged on the fixing part, and is in contact with the outer surface of the battery cell through the force given by the fixing part, so that the periphery of the outside of the explosion-proof valve at the top of the battery cell is isolated from the outside.

Preferably, the fixing portion includes:

a base plate;

the bottom of the connecting rod is arranged on the bottom plate;

the connecting plate is arranged at the top of the connecting rod, the battery cell is located between the bottom plate and the connecting plate, and the bottom plate is in threaded connection with the connecting rod and the connecting rod is in threaded connection with the connecting plate.

Preferably, the fixing portion further includes a backing plate, and the backing plate is disposed between the bottom plate and the battery core.

Preferably, the sealing portion includes:

one end of the sealing pressing block is arranged on the fixing part, the other end of the sealing pressing block is matched with the explosion-proof valve of the battery cell, a through hole is formed in the middle of the sealing pressing block, and the through hole is communicated with the explosion-proof valve of the battery cell and the air pressure testing device;

and the sealing gasket is arranged between the sealing pressing block and the battery core.

Preferably, the battery further comprises a sealing gasket, wherein the sealing gasket is embedded around the through hole of the sealing pressing block and used for preventing the internal pressure of the battery cell from leaking through the through hole of the sealing pressing block.

Preferably, the air pressure test device includes:

the puncture pressure rod is arranged on the sealing and fixing device and is used for puncturing the explosion-proof valve of the battery cell, and the puncture pressure rod is of a hollow structure;

and the air pressure sensor is communicated with the puncture pressure rod in a sealing way and is used for testing the air pressure in the battery cell conducted by the hollow structure of the puncture pressure rod.

Preferably, the air pressure testing device further comprises a handle, the handle is arranged on the puncture pressure rod, and the handle is convenient for transmitting puncture force to the puncture pressure rod so that the puncture pressure rod easily punctures the explosion-proof valve of the battery core.

Preferably, a sharp structure is arranged at one end of the puncture pressure lever, which is used for puncturing the explosion-proof valve of the battery cell, and the puncture pressure lever is made of a metal material with higher rigidity.

The utility model has the advantages that:

the utility model provides a pair of inside atmospheric pressure detecting device of square aluminum hull electricity core, including atmospheric pressure testing arrangement, sealed fixing device. Wherein, the atmospheric pressure testing arrangement sets up in the top of the top cap face of electric core during the initiation, and sealed fixing device takes lead with electric core top cap face contact cooperation, make explosion-proof valve on the electric core top cap face keep apart with the external world and only leave the required passageway of atmospheric pressure testing arrangement top-open explosion-proof valve and the inside intercommunication of electric core, atmospheric pressure testing arrangement passes the explosion-proof valve of this passageway top-open electric core, make the inside gas of electric core can be in the same direction as this passageway and enter into atmospheric pressure testing arrangement, so that measure the inside atmospheric pressure of electric core in the atmospheric pressure testing arrangement. Because the gas pressure testing device is sealed with the electric core junction and can not reveal to the inside gaseous passageway that flows into the gas pressure testing device of electric core is less, makes after the inside intercommunication of gas pressure testing device and electric core, the gaseous atmospheric pressure of electric core is almost unchangeable, so make the atmospheric pressure value that the gas pressure testing device surveyed be the inside atmospheric pressure before the electric core is not tested promptly, so the inside atmospheric pressure of electric core of measuring is accurate. And because the sealing fixing device and the battery cell are detachably connected (such as in a threaded connection mode), when another battery cell needs to be replaced for testing after the testing of a certain battery cell is completed, the battery cell to be tested only needs to be fixed and sealed by the sealing fixing device, and the battery cell can be tested without performing additional treatment in advance (for example, a structure with a sealing effect is fixed on the surface of the battery cell in an undetachable mode such as welding in advance to realize a sealing method).

To sum up, the utility model provides an inside atmospheric pressure detecting device of square aluminum hull electricity core has can convenient and fast and accurate advantage of measuring the inside atmospheric pressure of electricity core to need not to do extra processing to electric core before the test electricity core, reduce the cost of test, and then be convenient for provide data for electric core material lectotype and failure analysis.

Drawings

Fig. 1 is a schematic structural view of an air pressure detecting device inside a square aluminum-shell battery cell provided by the present invention;

fig. 2 is a sectional view of fig. 1 taken along the plane of the axes of the two connecting rods.

In the figure:

1. an air pressure testing device; 2. a sealing and fixing device; 3. an electric core; 11. puncturing the compression bar; 12. an air pressure sensor; 13. a handle; 21. a fixed part; 22. a sealing part; 211. a base plate; 212. a connecting rod; 213. a connecting plate; 214. a base plate; 221. sealing and pressing the block; 222. a sealing gasket; 223. and a gasket.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to fig. 2, the apparatus for detecting air pressure inside a square aluminum-clad cell provided in this embodiment includes an air pressure testing apparatus 1 and a sealing and fixing apparatus 2. The air pressure testing device 1 is arranged above the top cover surface of the battery cell 3, and the air pressure testing device 1 is communicated with the inside of the battery cell 3 through an explosion-proof valve which jacks up the battery cell 3 so as to test the internal air pressure of the battery cell 3. The sealing and fixing device 2 is used for sealing the joint of the air pressure testing device 1 and the battery cell 3, so that the air pressure testing device 1 is communicated with the battery cell 3 in a sealing manner, and the sealing and fixing device 2 is detachably connected with the battery cell 3. The air pressure testing device 1 is arranged on the top cover surface of the electric core 3 in advance through the sealing and fixing device 2, after the sealing and fixing device 2 seals the explosion-proof valve on the electric core 3 with the outside, the air pressure testing device 1 pushes open the explosion-proof valve on the top cover of the electric core 3 (because the explosion-proof valve is weaker than other parts of the electric core 3, the explosion-proof valve is provided with an explosion-proof hole communicated with the inside of the electric core 3 and is communicated with the inside of the electric core 3 after being easily pushed open, so the explosion-proof valve is selected as the pushing open position of the air pressure testing device 1), the inside of the electric core 3 is communicated with the air pressure testing device 1, the sealing and fixing device 2 seals between the air pressure testing device 1 and the electric core 3 (sealing can be carried out by adopting methods such as sealing ring sealing, packing sealing and the like), so that the gas in the electric core 3 can enter the air pressure, avoid appearing 3 inside atmospheric pressure reductions of electric core, and then measure 3 inside atmospheric pressure of electric core through atmospheric pressure testing arrangement 1.

Wherein, the atmospheric pressure testing arrangement 1 sets up in the top of the top cap face of electricity core 3 during the initiation, and sealed fixing device 2 takes first to cooperate with 3 top cap face contact of electricity core, make the explosion-proof valve on 3 top cap faces of electricity core keep apart with the external world and only leave the required passageway of atmospheric pressure testing arrangement 1 top explosion-proof valve and 3 inside intercommunications of electricity core, atmospheric pressure testing arrangement 1 passes the explosion-proof valve of this passageway top open electricity core 3, make 3 inside gases of electricity core enter into atmospheric pressure testing arrangement 1 along this passageway, so that measure 3 inside atmospheric pressure of electricity core in the atmospheric pressure testing arrangement 1. Because the pressure testing device 1 is sealed with 3 junctions of electric core to have sealed fixing device 2 and can not reveal, and 3 inside gaseous passageways that flow into pressure testing device 1 of electric core are less, make after pressure testing device 1 and 3 inside intercommunications of electric core, the gaseous atmospheric pressure of 3 inside electric cores is nearly unchangeable, so make the atmospheric pressure value that pressure testing device 1 surveyed be the inside atmospheric pressure before electric core 3 does not test promptly, so the inside atmospheric pressure of 3 inside electric cores of measuring is accurate. And because the sealing fixing device 2 and the battery core 3 are detachably connected (such as in a threaded connection), when another battery core 3 needs to be replaced to test after the test of a certain battery core 3 is completed, only the battery core 3 to be tested needs to be fixed and sealed through the sealing fixing device 2, and the battery core 3 can be tested without additional treatment in advance (for example, the structure with sealing function is fixed on the surface of the battery core 3 in an undetachable manner such as welding in advance to be used for realizing a sealing method), compared with the method that the sealing fixing device 2 is fixedly connected to the battery core 3 in an undetachable manner, the detachable structure can be used for completing the test process more quickly, and the sealing fixing device 2 can be used for multiple times to reduce the test cost.

In conclusion, the square aluminum-shell battery cell internal air pressure detection device provided by the embodiment has the advantages of being capable of conveniently, quickly and accurately measuring the internal air pressure of the battery cell 3, and the battery cell 3 is not required to be additionally processed before being tested, so that the test cost is reduced, and data can be conveniently provided for the material selection and failure analysis of the battery cell 3.

Further, the seal fixing device 2 includes a sealing portion 22 and a fixing portion 21. The fixing portion 21 acts on the electric core 3, and is configured to fix the electric core 3 and provide a force required by the sealing fixing device 2 to seal a joint of the air pressure testing device 1 and the electric core 3. The sealing portion 22 is disposed on the fixing portion 21, and is in contact with the outer surface of the battery cell 3 by a force given by the fixing portion 21, and isolates the outer periphery of the explosion-proof valve on the top of the battery cell 3 from the outside. The fixing portion 21 fixes the air pressure testing device 1 above the top cover surface of the electric core 3, and fixes the position of the air pressure testing device 1, so that the structure for ejecting the explosion-proof valve on the air pressure testing device 1 can be accurately aligned with the explosion-proof valve on the electric core 3. The sealing portion 22 tightly acts on the explosion-proof valve of the electric core 3 under the pressure given by the fixing portion 21, so that it is ensured that the gas inside the electric core 3 cannot leak into the external air after the air pressure testing device 1 is matched with the electric core 3.

Further, the fixing portion 21 includes a connection plate 213, a connection rod 212, and a bottom plate 211. The bottom plate 211 is used for supporting the battery cell 3, the upper surface of the bottom plate 211 contacts with the bottom of the battery cell 3, and the bottom of the connecting rod 212 is arranged on the bottom plate 211. The connecting plate 213 is disposed on the top of the connecting rod 212, the battery cell 3 is located between the bottom plate 211 and the connecting plate 213, and the bottom plate 211 and the connecting rod 212 and the connecting plate 213 are both connected by threads. The sealing part 22 is connected to the connecting plate 213, and the distance between the connecting plate 213 and the bottom plate 211 can be reduced by screwing the screw between the connecting plate 213 and the connecting rod 212, so that the sealing part 22 on the bottom plate 211 is tightly matched with the explosion-proof valve on the top cover surface of the battery cell 3 between the connecting plate 213 and the bottom plate 211 under the screwing force effect, and the sealing function of the sealing part 22 is realized.

In order to enable the square aluminum-shell battery cell internal air pressure detection device to test the internal air pressure of the battery cells 3 with different heights (the distance between the top cover surface of the battery cell 3 and the surface opposite to the top cover surface), further, the fixing portion 21 further includes a backing plate 214, the backing plate 214 is disposed between the bottom plate 211 and the battery cell 3, and the height of the backing plate 214 can be designed according to the height of the battery cell 3 to be tested. During the use, only need put bottom plate 211 with backing plate 214 on, then make electric core 3 arrange in on backing plate 214, alright in order to be in sealing 22 on connecting plate 213 can be in the pressure-down in-process of connecting plate 213 with the explosion-proof hole in the top cap face of electric core 3 in close contact with to follow-up test work goes on. Therefore, the range of the size of the battery cell 3 which can be tested by the square aluminum-shell battery cell internal air pressure detection device can be increased by arranging the base plate 214, so that the square aluminum-shell battery cell internal air pressure detection device has stronger practicability.

Further, the sealing portion 22 includes a sealing pressing block 221 and a sealing washer 222. One end of the sealing pressing block 221 is arranged on the fixing portion 21, the other end of the sealing pressing block 221 is matched with the anti-explosion valve of the battery cell 3, a through hole is formed in the middle of the sealing pressing block 221, and the through hole is communicated with the anti-explosion valve of the battery cell 3 and the air pressure testing device 1. The sealing washer 222 is disposed between the sealing pressing block 221 and the battery cell 3, and preferably, a sealing groove may be disposed at the bottom of the sealing pressing block 221, and the sealing washer 222 is disposed in the sealing groove. When sealing is needed, the fixing portion 21 gives a sealing pressure to the sealing pressing block 221, the sealing pressing block 221 transmits the sealing pressure to the sealing washer 222, and the sealing washer 222 has certain elasticity, so that when the sealing washer 222 is under the pressure, the sealing washer 222 can elastically deform, the upper end and the lower end of the sealing washer 222 are respectively in close contact with the top cover surface of the battery cell 3 and the sealing pressing block 221, and the explosion-proof valve below the sealing pressing block 221 is sealed.

In order to improve the sealing effect of the sealing part 22 and further improve the accuracy of the test, further, a sealing gasket 223 is further included, and the sealing gasket 223 is embedded around the through hole of the sealing pressing block 221, so as to prevent the internal pressure of the battery cell 3 from leaking through the through hole of the sealing pressing block 221. Through setting up sealed the pad 223, make the fit clearance between atmospheric pressure testing arrangement 1 and the sealed briquetting 221 sealed, atmospheric pressure testing arrangement 1 sliding fit is in the middle part through-hole of sealed briquetting 221, because the diameter of through-hole slightly is greater than the complex atmospheric pressure testing arrangement 1 with it, so in order to make and avoid the inside gas of electric core 3 to leak from the two fit clearance, set up elastic sealed pad 223 in the through-hole, make sealed pad 223 receive extrusion deformation through the screw between sealed briquetting 221 of screwing and the fixed part 21, and then make sealed pad 223 closely laminate between with sealed briquetting 221 and the atmospheric pressure testing arrangement 1, so realize the clearance between sealed atmospheric pressure testing arrangement 1 and the sealed briquetting 221, and then improve the sealed effect of sealing 22, reduce the inside gaseous leakage of electric core 3, improve the accuracy of test.

Further, the air pressure testing device 1 comprises an air pressure sensor 12 and a puncture pressure rod 11. The puncture pressure lever 11 is arranged on the sealing and fixing device 2, a thread seal is adopted between the puncture pressure lever 11 and the sealing and fixing device 2, the puncture pressure lever 11 is used for puncturing an explosion-proof valve of the battery cell 3, and the puncture pressure lever 11 is of a hollow structure (the outer diameter of the puncture pressure lever 11 is slightly smaller than the diameter of a through hole on the sealing pressing block 221). The air pressure sensor 12 is in sealed communication with the puncture pressure rod 11 and is used for testing the air pressure inside the battery cell 3 conducted by the hollow structure of the puncture pressure rod 11. Preferably, the puncture pressure lever 11 should be as small as possible without affecting the air pressure sensor 12, so that the air pressure change value inside the battery cell 3 is smaller when the battery cell 3 is communicated with the air pressure testing device 1, and the testing value is more accurate.

In order to facilitate the puncturing of the puncturing pressure rod 11 into the electric core 3, further, the air pressure testing device 1 further comprises a handle 13, the handle 13 is arranged on the puncturing pressure rod 11, and the handle 13 is used for transmitting the puncturing force to the puncturing pressure rod 11 so that the puncturing pressure rod 11 punctures the explosion-proof valve of the electric core 3 easily. The handle 13 is welded on the puncture pressure rod 11, and the puncture force required for puncturing the explosion-proof valve can be easily applied to the puncture pressure rod 11 through the handle 13. Further, the handle 13 is of a symmetrical structure with respect to the piercing press rod 11, so that when an external force acts on the handle 13, the piercing press rod 11 can be given a force more parallel to the piercing press rod 11 relative to the asymmetrical handle 13, so that the force acting on the handle 13 can be basically used for the piercing press rod 11 to pierce the explosion-proof valve, so that the force acting on the handle 13 does not cause the piercing press rod 11 to deform, and further, the piercing press rod 11 can be conveniently pierced into the battery cell 3.

In order to make the puncture pressure rod 11 pierce the interior of the battery cell 3 at the explosion-proof valve easily, further, one end (bottom) of the puncture pressure rod 11 for piercing the explosion-proof valve of the battery cell 3 is provided with a sharp structure, and the puncture pressure lever 11 is made of metal materials (high-strength alloy steel, titanium alloy and the like) with higher rigidity, so that the puncture pressure lever 11 can easily puncture the explosion-proof valve through a sharp structure arranged at the bottom (the sharp structure can ensure that the puncture pressure lever 11 can improve the pressure between the puncture pressure lever 11 and the explosion-proof valve under the same puncture force action, so that the puncture pressure lever 11 can more easily jack the explosion-proof valve), and because the puncture pressure lever 11 has high strength, a thinner structure can be adopted, and the situation of bending or breaking when the explosion-proof valve is punctured is not easy to occur, so that the piercing press rod 11 can pierce the interior of the cell 3 at the explosion-proof valve relatively easily.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims (9)

1. The utility model provides an inside atmospheric pressure detection device of square aluminum hull electricity core which characterized in that includes:

the air pressure testing device (1) is arranged above the top cover surface of the battery cell (3), and the air pressure testing device (1) is communicated with the interior of the battery cell (3) through an explosion-proof valve which jacks the battery cell (3) so as to test the internal air pressure of the battery cell (3);

the sealing and fixing device (2) is used for sealing the joint of the air pressure testing device (1) and the battery cell (3), so that the air pressure testing device (1) is communicated with the interior of the battery cell (3) in a sealing manner, and the sealing and fixing device (2) is detachably connected with the battery cell (3).

2. The apparatus for detecting air pressure inside square aluminum-clad cell as claimed in claim 1, wherein the sealing and fixing device (2) comprises:

the fixing part (21) acts on the battery cell (3), and is used for fixing the battery cell (3) and providing a force required by the sealing and fixing device (2) for sealing the connection part of the air pressure testing device (1) and the battery cell (3);

the sealing part (22) is arranged on the fixing part (21), the force given by the fixing part (21) is in contact with the outer surface of the battery cell (3), and the periphery of the outer part of the explosion-proof valve at the top of the battery cell (3) is isolated from the outside.

3. The apparatus of claim 2, wherein the fixing portion (21) comprises:

a bottom plate (211);

a connecting rod (212), the bottom of the connecting rod (212) is arranged on the bottom plate (211);

the connecting plate (213), the connecting plate (213) set up in the top of connecting rod (212), just electric core (3) are in bottom plate (211) with between connecting plate (213), all adopt threaded connection between bottom plate (211) with between connecting rod (212) and connecting plate (213).

4. The apparatus of claim 3, wherein the apparatus comprises:

the fixing part (21) further comprises a backing plate (214), and the backing plate (214) is arranged between the bottom plate (211) and the battery cell (3).

5. The apparatus for detecting air pressure inside square aluminum-clad cell according to claim 2, wherein the sealing part (22) comprises:

one end of the sealing pressing block (221) is arranged on the fixing part (21), the other end of the sealing pressing block (221) is matched with the explosion-proof valve of the battery cell (3), a through hole is formed in the middle of the sealing pressing block (221), and the through hole is communicated with the explosion-proof valve of the battery cell (3) and the air pressure testing device (1);

the sealing washer (222) is arranged between the sealing pressing block (221) and the battery core (3).

6. The apparatus of claim 5, wherein the apparatus comprises:

still include sealed pad (223), sealed pad (223) embedding set up around the through-hole of sealed briquetting (221), be used for avoiding electric core (3) internal pressure passes through the through-hole department of sealed briquetting (221) leaks.

7. The apparatus for detecting air pressure inside square aluminum-clad battery cell according to claim 1, wherein the air pressure testing apparatus (1) comprises:

the puncture pressure lever (11) is arranged on the sealing and fixing device (2) and is used for puncturing an explosion-proof valve of the battery cell (3), and the puncture pressure lever (11) is of a hollow structure;

the air pressure sensor (12) is communicated with the puncture pressure rod (11) in a sealing mode and used for testing the air pressure in the battery cell (3) conducted by the hollow structure of the puncture pressure rod (11).

8. The apparatus of claim 7, wherein the apparatus comprises:

the air pressure testing device (1) further comprises a handle (13), wherein the handle (13) is arranged on the puncture pressure lever (11), and the handle (13) is convenient for transmitting puncture force to the puncture pressure lever (11) so that the puncture pressure lever (11) can easily puncture the explosion-proof valve of the battery core (3).

9. The apparatus of claim 7, wherein the apparatus comprises:

the puncture pressure lever (11) is used for puncturing one end of an explosion-proof valve of the battery cell (3) and is provided with a sharp structure, and the puncture pressure lever (11) is made of a metal material with higher rigidity.

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