Battery cell jig that bolt-fastens through uniform pressure

Patent metadata

Field	Value
Publication number	US-12334491-B2
Application number	US-202117799778-A
Country	US
Kind code	B2
Filing date	Aug 10, 2021
Priority date	Aug 11, 2020
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

The present technology relates to a battery cell jig for fastening bolts with uniform pressure when fixing a battery cell between first and second plates by applying the same rotating force to a plurality of bolt fastening units. The battery cell jig includes first and second plates arranged to face each other, n bolt fastening units, where the n is an integer equal to or greater than 2, a rotating member which is installed on one surface of the first plate or the second plate and is installed on an opposite side of a surface where the first and second plates face each other, and a driving unit which transmits rotating force of the rotating member to each of the n bolt fastening units.

First claim

The invention claimed is:

1. A battery cell jig comprising:
first and second plates arranged to face each other and configured to hold a battery cell therebetween;
n bolt fastening units including a bolt and a nut to allow the first plate to be fastened to the second plate to press the battery cell, wherein n is an integer equal to or greater than 2;
a rotator installed on one surface of the first plate or the second plate and installed on an opposite side of a surface where the first and second plates face each other;
a driver configured to transmit rotating force of the rotator to each of the n bolt fastening units, wherein the driver includes:
a first gear unit connected to the rotator and configured to be rotated by rotation of the rotator;
a second gear unit configured to:
engage with the first gear unit, and
transmit the rotating force in a direction other than an axial direction of the first gear unit; and

a third gear unit configured to:
engage with the second gear unit, and
transmit the rotating force in a direction other than an axial direction of the second gear unit, wherein the third gear unit is connected to at least one bolt fastening unit among the n bolt fastening units in a first region opposite to a second region where the third gear unit is configured to engage with the second gear unit; and

a pressing plate laminated on the one surface of the first plate, wherein the pressing plate has the driver built therein.

2. The battery cell jig of claim 1 , wherein the driver includes
n second gear units configured to:
engage with the first gear unit in a perpendicular direction, and
rotate in a direction perpendicular to a rotating direction of the first gear unit; and

wherein the third gear unit is configured to:
engage with each of the n second gear units in a perpendicular direction, and
rotate in a direction perpendicular to a rotating direction of the n second gear units, and

wherein the third gear unit is connected to the at least one bolt fastening unit in a region opposite to a region where the third gear unit is configured to engage with the n second gear units.

3. The battery cell jig of claim 1 , wherein the first gear unit includes:
a first rotation shaft having one side connected to the rotator; and
a first driving bevel gear fixed at the other side of the first rotation shaft and configured to be rotated by the rotator.

4. The battery cell jig of claim 3 , wherein the second gear unit includes:
a second rotation shaft;
a first follower bevel gear fixed at one side of the second rotation shaft and configured to engage with the first driving bevel gear; and
a second driving bevel gear fixed at the other side of the second rotation shaft and configured to be rotated by rotation of the first follower bevel gear.

5. The battery cell jig of claim 4 , wherein the third gear unit includes:
a third rotation shaft; and
a third follower bevel gear fixed at one side of the third rotation shaft and configured to engage with the second driving bevel gear,
wherein the other side of the third rotation shaft is connected to the at least one bolt fastening unit.

6. The battery cell jig of claim 1 ,
wherein the first gear unit includes:
a first rotation shaft connected to the rotator, and
a first driving bevel gear fixed at an end of the first rotation shaft and configured to be rotated by the rotator;

wherein the driver includes n second gear units that include:
a first follower bevel gear configured to engage with the first driving bevel gear,
a second rotation shaft connected to the first follower bevel gear, and
a second driving bevel gear fixed at an end of the second rotation shaft and configured to be rotated by rotation of the first follower bevel gear; and

wherein the third gear unit includes:
a second follower bevel gear configured to engage with the second driving bevel gear, and
a third rotation shaft connected to the second follower bevel gear, and
wherein the third gear unit is connected to the at least one bolt fastening unit in a region opposite to a region where the third gear unit is configured to engage with the second driving bevel gear.

7. The battery cell jig of claim 1 , wherein the driver is configured to be detachable from the first plate.

8. The battery cell jig of claim 1 , further comprising a pressure sensor arranged between the first plate and the pressing plate and configured to measure a changing pressure value between the first plate and the pressing plate during rotation of the rotator.

9. The battery cell jig of claim 8 , wherein the pressure sensor has a planar structure.

10. The battery cell jig of claim 2 , wherein the first gear unit includes:
a first rotation shaft having one side connected to the rotator; and
a first driving bevel gear fixed at the other side of the first rotation shaft and configured to be rotated by the rotator.

11. The battery cell jig of claim 10 , wherein the n second gear units include:
a second rotation shaft;
a first follower bevel gear fixed at one side of the second rotation shaft and configured to engage with the first driving bevel gear; and
a second driving bevel gear fixed at the other side of the second rotation shaft and configured to be rotated by rotation of the first follower bevel gear.

12. The battery cell jig of claim 11 , wherein the third gear unit includes:
a third rotation shaft; and
a third follower bevel gear fixed at one side of the third rotation shaft and configured to engage with the second driving bevel gear,
wherein the other side of the third rotation shaft is connected to the at least one bolt fastening unit.

13. The battery cell jig of claim 12 , further comprising a pressure sensor arranged between the first plate and the pressing plate and configured to measure a changing pressure value between the first plate and the pressing plate during rotation of the rotator.

14. The battery cell jig of claim 13 , wherein the pressure sensor has a planar structure.

15. The battery cell jig of claim 14 , wherein the driver is configured to be detachable from the first plate.

16. The battery cell jig of claim 6 , further comprising a pressure sensor arranged between the first plate and the pressing plate and configured to measure a changing pressure value between the first plate and the pressing plate during rotation of the rotator.

17. The battery cell jig of claim 16 , wherein the pressure sensor has a planar structure.

18. The battery cell jig of claim 17 , wherein the driver is configured to be detachable from the first plate.

Assignees

• Lg Energy Solution Ltd

Inventors

• Jin So Yeon
• Song Seung Hwa

Classifications

• B25B1/02

  with sliding jaws · CPC title

• B23P19/067

  Bolt tensioners (for hand tools B25B29/02) · CPC title

• G01L1/14

  by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators · CPC title

• G01R31/3865

  related to manufacture, e.g. testing after manufacture · CPC title

• H01M10/0481

  Compression means other than compression means for stacks of electrodes and separators · CPC title