Granted Patent B2

US 12,646,756 · App. 18/376,811 · Granted Jun 2, 2026

Inventor: Kang Min Lee (Cheongju-si, KR)

H01M10/4285G01K17/00H01M50/105

Abstract

Claims (33)

1 . A device for pressure evaluation of a secondary battery, the device comprising:

a storage configured to have a storage space in which the secondary battery is stored;

a spacer configured to adsorb and then pull one side of the secondary battery to form an internal space of the secondary battery;

an injector configured to be installed in the spacer and pierce the secondary battery with a needle with an air injection passage formed therein, and inject air at positive pressure into the internal space of the secondary battery through the air injection passage; and

a pressure measuring unit configured to measure air pressure in the internal space connected to the air injection passage.

2 . The device of claim 1 ,

wherein the storage comprises a storage main body having the storage space and including a first support plate supporting one side of the secondary battery and first expansion allowance holes on sides of the first support plate to allow expansion of the secondary battery; and

a cover part opening and closing the storage space of the storage main body and including a second support plate supporting the secondary battery on the opposite side of the secondary battery to which the first support plate is in contact and second expansion allowance holes on sides of the second support plate to face the first expansion allowance holes, respectively, and allow expansion of the secondary battery.

3 . The device of claim 2 ,

wherein a lifting hole is formed in the cover part through which the spacer is lifted.

4 . The device of claim 1 ,

wherein the spacer comprises a lifting block including a moving guide hole guiding the movement of the needle and at least one intake hole applying an adsorption force to the secondary battery;

an adsorption unit coupled to the lifting block to face the secondary battery and including a first connection hole connected to a movement guide hole, which is through which the needle passes, and a second connection hole connected one-to-one with the intake hole;

a moving drive unit moving the lifting block so that the needle moves closer to or farther away from the secondary battery while allowing the adsorption unit to contact or separate from the secondary battery; and

a suction control unit connected to the intake hole and sucking the secondary battery to the adsorption unit through air intake when the adsorption unit contacts the secondary battery.

5 . The device of claim 4 ,

wherein the adsorption unit comprises a first adsorption ring coupled to the lifting block and having the first connection hole formed thereon; and

a second adsorption ring coupled to the lifting block and arranged to be concentric with the first adsorption ring, having a larger diameter than the diameter of the first adsorption ring, having the first adsorption ring located in the internal space thereof, and having the second connection hole.

6 . The device of claim 1 , wherein the injector further comprises: a housing receiving the needle and having a third connection hole connected to the air injection passage;

an air supply unit supplying air to the air injection passage through the third connection hole; and

a needle-driving unit moving the housing in the direction of the secondary battery so that the needle pierces the secondary battery.

7 . The device of claim 6 , further comprising: a plurality of packing parts configured to be mounted on an outer periphery of the housing to be spaced apart from each other, wherein the outer periphery is in close contact with an inner periphery of the spacer.

8 . The device of claim 6 ,

wherein when the air supply unit is not operating, the pressure in an inside of the secondary battery and a space between an outside of the needle and the packing part is maintained at atmospheric pressure.

9 . The device of claim 1 , further comprising: an adsorption unit configured to be installed in the storage to adsorb and fix the secondary battery on the opposite side of the secondary battery that the spacer is in contact with.

10 . A method for evaluating withstand pressure of a secondary battery, the method comprising:

step (a) of adsorbing and then pulling, by a spacer, one side of the secondary battery to form an internal space of the secondary battery;

step (b) of punching the secondary battery with a needle having an air injection passage formed therein and then injecting, by an air supply unit, air into the internal space of the secondary battery through the air injection passage; and

step (c) of measuring, by a pressure measuring unit, the air pressure of the air injection passage.

11 . The device of claim 10 , further comprising: before or after step (a), a step of adsorbing, by an adsorption unit installed in a storage, the secondary battery on the opposite side of the secondary battery that is in contact with a spacer.

12 . The device of claim 10 ,

wherein step (b) comprises step (b1) of moving and inserting the needle into the secondary battery; and

step (b2) of operating, when the needle is inserted into the secondary battery, the air supply unit to inject air into the secondary battery.

Priority Claims (2)

Continuity (1)

References Cited (16)