KR20230045407A - Battery cell jig - Google Patents

Abstract

The present invention relates to a battery cell jig provided with a temperature measuring unit to prevent the temperature measuring unit from being separated from the battery cell jig. The present invention includes: first and second plates arranged to face each other; two or more bolt coupling units for fixing the first and second plates; and a temperature measuring unit provided on the first or second plate.

Description

Battery cell jig {BATTERY CELL JIG}

The present invention relates to a battery cell jig, and more particularly, to a battery cell jig with improved reliability of temperature measurement.

Currently commercially available secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and lithium secondary batteries. It is in the limelight because of its very low self-discharge rate and high energy density.

These lithium secondary batteries mainly use a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with such a positive electrode active material and a negative electrode active material are disposed with a separator therebetween, and an exterior material for sealing and housing the electrode assembly together with an electrolyte solution. It can be classified into a secondary battery and a pouch-type secondary battery. Such a single secondary battery may be referred to as a battery cell.

A secondary battery is manufactured by accommodating an electrode assembly in a battery case, injecting an electrolyte solution, and then going through a battery activation step. At this time, the battery activation step includes a process of charging and discharging the secondary battery under conditions necessary for activation after mounting the secondary battery in a battery cell jig. Such a battery cell jig is mainly used to charge or discharge a secondary battery in a battery activation step, and is also used for performance evaluation of a secondary battery.

When evaluating performance using a battery cell jig, temperature not only affects the performance of a battery cell, but also becomes an important indicator for preventing fire or explosion. Therefore, it is necessary to measure the temperature in real time when evaluating battery cell performance. In addition, a thermocouple sensor is used to measure the temperature.

1 is a schematic diagram of a conventional battery cell jig for evaluating battery cell performance. Referring to FIG. 1 , a typical battery cell jig 10 presses and fixes a battery cell 1 through first plates 11 and second plates 12 positioned at upper and lower portions, respectively, and measures temperature. An insulating tape 21 was used to attach/fix the thermocouple sensor 20 on the first plate 11.

As the battery cell jig repeats the performance evaluation of the battery cell, the adhesive strength of the insulating tape is weakened, and the thermocouple sensor 20 is detached from the battery cell jig during the performance evaluation, reliability of the temperature measurement value and safety of the evaluation. will have a negative impact on

Republic of Korea Patent No. 1852238

The present invention is to solve the above problems, and an object of the present invention is to improve the reliability of temperature measurement and further safety of evaluation by preventing the temperature measuring unit from being detached from the battery cell jig.

The battery cell jig according to the present invention includes first and second plates disposed to face each other; two or more bolt fastening parts fixing the first and second plates in a state where the battery cell is interposed therebetween; and a temperature measuring unit provided on the first or second plate.

In one specific example, the temperature measuring unit, a hemispherical suction pad provided with a circular indentation; a thermocouple sensor embedded in the suction pad; and an extension cable having one end connected to the thermocouple sensor and the other end extending to the outside of the suction pad, wherein the temperature measurement unit applies pressure to the suction pad to measure the first or second plate It is configured to be adsorbed on.

In one specific example, the suction pad is made of silicone rubber.

In one specific example, a plurality of wires constituting the thermocouple sensor may be radially disposed inside the suction pad.

In one specific example, the first or second plate is provided with an insertion hole for inserting the temperature measuring unit.

At this time, the temperature measuring unit, the insertion block having the same shape as the transverse cross-section of the insertion hole; a thermocouple sensor embedded in the insertion block; and an extension cable having one end connected to the thermocouple sensor and the other end extending to the outside of the insertion block, wherein the insertion block is inserted into the insertion hole and coupled to the first plate or the second plate. It consists of

In one specific example, the insertion block is a rubber material.

In one specific example, the thickness length of the insertion block is greater than each thickness length of the first plate or second plate, so that a portion of the insertion block is exposed to the outside of the first plate or second plate.

In one specific example, the shape of the transverse cross section of the insertion block is circular or rectangular.

In one specific example, the bolt fastening portion has a structure formed to penetrate the first and second plates and to be spaced apart from each other at regular intervals in an area where no battery cells are located.

In one specific example, the bolt fastening portion has a structure formed of 4 to 12 pieces.

In one specific example, the battery cell jig of the present invention further includes a charge/discharge unit electrically connected to the first and second electrode leads of the battery cell.

Since the battery cell jig of the present invention has a structure in which the temperature measurement unit is adsorbed or inserted into the first plate or the second plate constituting the battery cell jig, it prevents the temperature measurement unit from being detached from the battery cell jig, It has the effect of improving reliability.

1 is a schematic diagram of a conventional battery cell jig.
2 is a schematic diagram of a battery cell jig according to one embodiment of the present invention.
3 is a schematic diagram of a temperature measuring unit according to one embodiment of the present invention.
FIG. 4 is a schematic view showing how the temperature measuring unit of FIG. 3 is adsorbed to a battery cell jig.
5 is a schematic diagram of a battery cell jig according to another embodiment of the present invention.
6 and 7 are schematic diagrams of a temperature measuring unit according to another embodiment of the present invention.
8 is a side view of the battery cell jig.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be exemplified and described in detail in the detailed description. However, it should be understood that this is not intended to limit the present invention to specific embodiments, and includes all transformations, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as 'include' or 'having' are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded. Hereinafter, an automatic two-component resin inspection apparatus according to an embodiment of the present invention, a two-component resin automatic inspection apparatus system including the same, and a two-component resin automatic inspection method will be described with reference to the drawings.

Hereinafter, the present invention will be described in detail.

The present invention relates to a battery cell jig in which reliability of temperature measurement and safety of evaluation are improved by providing a temperature measurement unit in the battery cell jig and preventing the temperature measurement unit from being detached from the battery cell jig.

The battery cell jig according to the present invention includes first and second plates disposed to face each other; two or more bolt fastening parts fixing the first and second plates in a state where the battery cell is interposed therebetween; and a temperature measuring unit provided on the first or second plate.

In a conventional battery cell jig, a temperature measurement unit for temperature measurement is attached/fixed to a first plate or a second plate by means of an insulating tape. As the number of performance evaluations increased, the adhesiveness of the insulating tape decreased, and the temperature measurement unit was detached from the battery cell jig, or the temperature measurement unit was not properly fixed, resulting in a problem in reliability of temperature measurement. Accordingly, the present invention provides a battery cell jig having a structure including a temperature measuring unit.

Hereinafter, the battery cell jig according to the present invention will be described in detail with reference to FIGS. 2 to 8 . Like reference numerals have been used for like elements throughout the description of each figure. In the accompanying drawings, the dimensions of the structures are shown enlarged than actual for clarity of the present invention.

1st embodiment

2 is a schematic diagram of a battery cell jig according to one embodiment of the present invention, and FIG. 3 is a schematic diagram of a temperature measuring unit according to one embodiment of the present invention.

Referring to FIGS. 2 and 3 , the battery cell jig 100 according to the present invention includes a first plate 110 and a second plate 120 disposed to face each other; Two or more bolt fastening parts 130 fixing the first and second plates in a state where the battery cell 1 is interposed therebetween; and a temperature measuring unit 140 provided on the first or second plate.

The temperature measuring unit 140 includes a hemispherical suction pad 141 having a circular indentation; a thermocouple sensor (thermocouple, 142) built into the suction pad; and an extension cable 143 having one end connected to the thermocouple sensor and the other end extending to the outside of the suction pad.

The suction pad 141 is a member for adsorbing and fixing the thermocouple sensor 142 to the first plate 110 or the second plate 120 . The body of the suction pad 141 has a hemisphere shape in which a circular indentation is formed, and a thermocouple sensor 142 is embedded inside the suction pad 141 . Since the suction pad 141 in which the thermocouple sensor 142 is embedded is adsorbed and fixed to the first plate 110 or the second plate 120 of the battery cell jig 100, the battery cell jig 100 of the present invention , it is difficult for the thermocouple sensor to detach from the battery cell jig.

FIG. 4 is a view showing a method of attaching the suction pad to the first plate. Referring to FIG. 4, when pressure is applied to the hemispherical body of the suction pad 141, the air inside the empty space of the hemispherical body escapes. It is a structure in which the suction pad is adsorbed to the first plate 110 or the second plate while going.

The suction pad is preferably made of a material containing silicone rubber so as to increase the suction force between the suction pad and the first plate or the second plate. Since silicone rubber has appropriate elasticity and flexibility, it can be well adsorbed to a metal plate, and because it has excellent heat resistance and insulation, it can maintain adsorption power even when exposed to a high temperature environment during performance evaluation, and has electrical properties. does not affect the evaluation.

The thermocouple sensor 141 has a structure including a plurality of wires and is embedded in the suction pad. Referring to (b) of FIG. 3 , a plurality of wires 142 constituting the thermocouple sensor 141 are embedded in the suction pad, but arranged in a radial form. The number of wires may be 2 or more, 4 or more, or 4 to 12.

8 is a side view of the battery cell jig of the present invention. Referring to FIG. 8, the bolt fastening part 130 is formed to penetrate the first and second plates 110 and 120, and the battery cell 1 It is a structure formed spaced apart at regular intervals in an unlocated area. Since the bolt fastening parts 130 are spaced apart at regular intervals, a uniform pressure can be applied to the battery cell 1 . Meanwhile, the bolt fastening part 130 means a bolt and a nut.

The bolt fastening part 130 is fastened through the first plate 110 and the second plate 120, and the first plate 110 in a state in which the battery cell 1 is interposed by a combination of a bolt and a nut And the second plate 120 is fixed.

In a specific embodiment, the bolt fastening part 130 may have a structure in which 4 to 12 are formed. Specifically, 6 to 10 bolt fastening parts 130 may be formed, and more specifically, 6 to 8 bolt fastening parts 130 may be formed.

The battery cell interposed in the battery cell jig of the present invention may be a pouch type battery.

In one embodiment, a charging and discharging unit (not shown) electrically connected to the first electrode lead and the second electrode lead of the battery cell 1 is further included.

2nd Embodiment

5 is a schematic diagram of a battery cell jig according to another embodiment of the present invention, and FIG. 6 is a schematic diagram of a temperature measuring unit according to one embodiment of the present invention.

5 and 6, the battery cell jig 200 according to the present invention includes a first plate 210 and a second plate 220 disposed to face each other; Two or more bolt fastening parts 230 fixing the first and second plates in a state where the battery cell 1 is interposed therebetween; and a temperature measuring unit 240 provided on the first or second plate.

Also, the first plate 210 includes an insertion hole 211 for inserting a temperature measuring unit. The insertion hole 211 is for inserting a temperature measurement unit, and since the temperature measurement unit is inserted into the insertion hole and fixed to the first plate, it is possible to prevent the temperature measurement unit from being separated from the battery cell jig.

The temperature measuring unit 240 may include an insertion block 241 having the same shape as the cross section of the insertion hole; a thermocouple sensor 242 (thermocouple) built into the insertion block 241; and an extension cable 243 having one end connected to the thermocouple sensor 242 and the other end extending to the outside of the insertion block 241, wherein the insertion block 242 is connected to the insertion hole 211. ) is configured to be inserted into. The insertion block 242 maintains an interference fit state in the insertion hole 211 .

In the drawings, the embodiment in which the insertion hole is formed in the first plate is shown, but the insertion hole may be formed in the second plate so that the insertion block is inserted into the insertion hole of the second plate.

Since the insertion block 241 must be inserted into the insertion hole 211 and fixed in a state of being inserted into the first plate or the second plate, the material of the insertion block is preferably a rubber material having excellent elasticity and restoring force. do.

At this time, in order for the insertion block to be inserted into the insertion hole and well maintained in a fixed state, the shape of the cross section of the insertion block and the shape of the cross section of the insertion hole in the transverse direction are the same, and the transverse direction of the insertion block It is preferable that the cross-sectional area and the transverse cross-sectional area of the insertion hole are similar in size. If the lateral cross-sectional area of the insertion block is too small compared to the cross-sectional area of the insertion hole, the insertion block is not fixed to the insertion hole, and conversely, the cross-sectional area of the insertion block is too small compared to the cross-sectional area of the insertion hole. When large, it is not easy to insert the insertion block, so the cross-sectional area of the insertion block in the transverse direction is preferably equal to or slightly larger than the cross-sectional area of the insertion hole in the transverse direction.

In addition, in the drawings, although the cross-sectional shape of the insertion block is shown only in a circular shape, it is not limited thereto and may have a rectangular shape.

Referring to FIG. 7 , the thickness h1 of the insertion block is greater than the thickness h2 of each of the first plate or the second plate, so that a portion of the insertion block is exposed to the outside of the first plate or the second plate. It is a structure that becomes

And, the inner end of the insertion block inserted into the insertion hole, as shown in Figure 7 (a), can be inserted as long as the thickness of the first plate 210, otherwise shown in Figure 7 (b) As described above, the inner end of the insertion block inserted into the insertion hole may be in the form of slightly protruding inward from the first plate 210 . When the insertion block slightly protrudes, the insertion block may directly contact the battery cells under the first plate.

Since the contents of the bolt fastening unit 230 and the charging/discharging unit (not shown) are the same as those of the first embodiment, a detailed description thereof will be omitted.

Although one embodiment of the present invention has been described above, those skilled in the art can add, change, delete, or add components within the scope not departing from the spirit of the present invention described in the claims. The present invention can be variously modified and changed by the like, and this will also be said to be included within the scope of the present invention.

100, 200: battery cell jig
110, 210: first plate
120, 220: second plate
221: insertion hole
140, 240: temperature measuring unit
141: suction pad
142, 242: thermocouple sensor
143, 243: extension cable
241: insert block
1: battery cell

Claims (12)

first and second plates disposed to face each other;
two or more bolt fastening parts fixing the first and second plates in a state where the battery cell is interposed therebetween; and
A battery cell jig comprising a temperature measuring unit provided on the first or second plate.
The method according to claim 1, wherein the temperature measuring unit,
A hemispherical suction pad provided with a circular indentation;
a thermocouple sensor built into the suction pad; and
An extension cable having one end connected to the thermocouple sensor and the other end extending to the outside of the suction pad,
The battery cell jig, characterized in that the temperature measuring unit is configured to be adsorbed to the first or second plate by applying pressure to the adsorption pad.
The battery cell jig according to claim 2, wherein the suction pad is made of silicon rubber.
The method of claim 2,
A battery cell jig, characterized in that a plurality of wires constituting the thermocouple sensor are radially arranged inside the suction pad.
The battery cell jig of claim 1, wherein the first or second plate has an insertion hole for inserting a temperature measuring unit.
The method according to claim 5, wherein the temperature measuring unit,
an insertion block having the same shape as the transverse cross section of the insertion hole;
a thermocouple sensor embedded in the insertion block; and
One end is connected to the thermocouple sensor, and the other end includes an extension cable pulled out of the insertion block,
A battery cell jig, characterized in that the insertion block is inserted into the insertion hole and is configured to be coupled to the first plate or the second plate.
The method of claim 6,
The battery cell jig, characterized in that the insertion block is a rubber material.
The battery cell jig of claim 6, wherein the insertion block has a thickness greater than each thickness of the first plate or the second plate, so that a portion of the insertion block is exposed to the outside of the first plate or the second plate.
The battery cell jig according to claim 6, wherein the insertion block has a shape of a cross section in a lateral direction of a circular shape or a rectangular shape.
The battery cell jig of claim 1, wherein the bolt fastening portion is formed through the first and second plates and is spaced apart from each other at regular intervals in an area where no battery cells are located.
The method according to claim 1, The battery cell jig having a structure in which 4 to 12 bolt fastening parts are formed.
The battery cell jig of claim 1, further comprising a charging/discharging unit electrically connected to the first and second electrode leads of the battery cell.

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