KR100829737B1 - Clip for contacting electrode of charge and discharge system of battery - Google Patents

Abstract

The present invention is to reduce the load on the power and equipment, and to charge and discharge a plurality of batteries at a time, and to prevent poor contact with the electrode due to the decrease in tension of the spring when used for a long time, protruding angle of the battery pouch At least two pairs of leaf springs formed so as to be able to bite electrodes on both sides thereof, a first support portion supporting one end of the leaf springs on either side of the leaf springs facing each other, and the leaf springs facing each other. A second support part for supporting one end of the leaf springs of the other side, and a driving part for driving at least one of the first support part and the second support part in a direction in which the respective leaf springs face each other to abut the plate springs facing each other; The present invention relates to an electrode contact clip of a battery charge / discharge system.

Description

Clip for contacting electrode of charge and discharge system of battery}

1A is a partial perspective view showing an electrode contact clip in a conventional battery charge / discharge system;

1B is a cross-sectional view illustrating a cross section taken along the line AA ′ of FIG. 1A;

Figure 2 is a partial perspective view showing the electrode contact clip of the battery charge and discharge system according to an embodiment of the present invention,

Figure 3a is a cross-sectional view showing a preferred embodiment of the electrode contact clip of the present invention,

3B is a cross-sectional view showing still another state of FIG. 3A;

4 is a cross-sectional view showing a preferred embodiment of the drive unit of the present invention;

<Brief description of symbols for the main parts of the drawings>

10: pouch case 11: battery compartment

12: gas receiver 13: electrode

20: electrode contact clips 22a, b, c, d: 1,2,3,4 leaf springs

23, 24: 1st and 2nd support part 26: spring member

30: drive unit 31: connecting rod

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode contact clip of a battery charge and discharge system, and more particularly, to an electrode contact clip that can be used in a battery charge and discharge system used for initial charge and discharge of a polymer secondary battery.

In general, the polymer secondary battery uses a polymer electrolyte, which is an ion conductive polymer having excellent ion conductivity, to reduce the possibility of leakage and explosion risk of the battery using the liquid electrolyte. In particular, the lithium polymer secondary battery is light, thin and various forms It is attracting attention as a next-generation battery because of its many advantages, such as battery design, high energy density, and high recharging frequency, and thus long life.

The lithium polymer secondary battery uses a polymer electrolyte prepared by adding a lithium salt and an organic solvent to an ion conductive polymer, and prepares an electrode assembly of a positive electrode, a polymer electrolyte, and a negative electrode using the polymer electrolyte. The electrode assembly is sealed in a pouch case made of aluminum, and then a predetermined charging and discharging process is performed. The charging and discharging after the assembly is to activate the electrode assembly of the battery to some extent, and to identify and select the capacity of the battery.

When the initial charge and discharge is performed after the battery is assembled as described above, a chemical reaction occurs in the electrode assembly of the battery, and gas is generated in the pouch case. Therefore, the gas must be removed after the charging and discharging process is completed. In order to remove the gas, the pouch case of the battery includes a battery accommodating part capable of accommodating an electrode assembly and a gas accommodating part capable of accommodating gas. It is formed to have, and the battery receiving portion and the gas receiving portion is formed to be interconnected through the passage.

Therefore, the gas generated from the electrode assembly through the initial charging and discharging process is discharged to the gas receiving part through a degassing process, which is a subsequent process. After the gas is discharged, the gas passage between the battery accommodating part and the gas receiving part is opened. The gas accommodating part is cut in the sealed state.

The conventional battery charging and discharging tray for initially charging and discharging a polymer battery has a stepped shape consisting of a plurality of layers in which insertion holes are formed so that a pouch case is inserted into each layer. The battery is charged and discharged by inserting a pouch case assembled such that the electrode protrudes into the stepped tray for charging and discharging and contacting one surface of the electrode with an electrode pin for applying power to charge and discharge the battery.

However, such a charge / discharge system has a large number of unnecessary spaces because the battery is accommodated in a multi-layered cascade, and when the electrode pin is contacted to apply a voltage to the electrode while the battery is inserted in the tray, the electrode and the electrode In many cases, pin contact was not made accurately, and thus, the process was difficult to perform.

Korean Patent Laid-Open Publication No. 2001-111920 disclosed by the present applicant discloses a charge / discharge system of a battery for improving the problem of the charge-discharge system for a flat ground as described above. According to the disclosed charge / discharge system, the battery pouch case is stored vertically in an upright or inverted state, i.e., the electrodes face upwards or downwards, in an insertion part arranged in parallel, so that a large number of battery pouches can be accommodated in a limited space. There is an advantage that the battery can be charged and discharged. In addition, the electrode contact clip picks up the electrodes of the battery from both sides of the tongs to perform charging and discharging, thereby increasing the productivity of the battery because the electrical contact between the electrodes and the electrode contacts is stably maintained.

Figure 1a is a partial perspective view for explaining the structure of the conventional electrode contact clip, the conventional electrode contact clip 1 is composed of a pair of leaf springs (3) on the support portion (2) facing each other. . The electrode 13 of the pouch case 10 in the inverted state is inserted into the electrode contact clip 1, wherein the leaf springs 3 are opposite to each other from the bottom as shown in FIG. 1B. The pin 4 is inserted between the springs 3 to open the leaf spring 3 to the left and right. After inserting the electrode 13 between the spaced-apart plate springs 3, the pin 4 is pulled downward in the state, and the leaf springs 3 return to their original positions by the restoring force, and the electrode 13 is moved. Bite. In FIG. 1B, reference numerals denote the battery accommodating part 11 and the gas accommodating part 12 of the pouch case 10.

The charger / discharger having the electrode contact clip measures the voltage between the positive electrode and the negative electrode of the battery through the clip, and induces a specific current to the electrode of the battery based on the measured value. It should be possible to ensure that the leaf springs are exactly in contact with the electrodes.                         

However, as can be seen in Figure 1b, in order to move the electrode contact clip used in the prior art had to open by applying an external force to the fixed leaf spring. This can be done simply by operating a single electrode contact clip, but in the light of a battery charging and discharging system that charges and discharges a plurality of batteries at a time, a large crowd will follow.

That is, in the battery charging / discharging system, up to 128 insertion holes for inserting the pouch case of the battery may be formed in 16 in the horizontal direction and 8 in the vertical direction. Thus, the pouch case is inserted into the plurality of insertion holes and the terminals thereof. In order to measure the voltage and flow the current by biting the electrode contact clip, the pins that open the plate spring of the electrode contact clip must be operated at the same time as shown in FIG.

However, as described above, in order to open a large number of leaf springs at once, the force applied thereto is also very large, and for this purpose, the size of the driving cylinder needs to be large. In fact, about 1.5 tons of force is required to open the leaf spring of the electrode contact clip for charging and discharging the battery of the tray into which the 16 cell pouch case is inserted.

Therefore, the size of the facility is very large to apply the method of fixing the leaf spring by the external force and in the actual mass production process, as in the conventional method, the consumption of energy is too much.

In addition, as shown in Figure 1b, the leaf spring is fixed, and in the structure of opening the leaf spring by applying an external force, a problem that the tension of the leaf spring is lowered after repeated several times. When the tension of the leaf spring is lowered in this way, the leaf spring of the clip does not come into close contact with the electrode.

The present invention has been made to solve the above problems, the object of the present invention is to reduce the burden on power and equipment in operating a plurality of electrode contact clips to charge and discharge a plurality of batteries at a time. To provide an electrode contact clip that can be.

Another object of the present invention is to provide an electrode contact clip that can be used for a long time by restraining the tension of the leaf spring is reduced to the maximum even if the charge and discharge is repeated by supporting the leaf spring in contact with each other as a separate member.

In order to achieve the above object, the present invention is formed so as to be able to bite each protruding electrode of the battery pouch on both sides thereof at least two pairs of plate springs facing each other, and the plate of any one of the facing plate springs Each of the leaf springs faces a first support portion supporting one end of the springs, a second support portion supporting one end of the leaf springs on the other side of the facing leaf springs, and at least one of the first support portion and the second support portion. It provides a clip for contacting the electrode of the battery charging and discharging system, characterized in that it comprises a drive unit for driving in the direction to make the plate springs facing each other.

According to another feature of the invention, the elastic member for imparting a predetermined elastic force can be provided between the first support portion and the second support portion.

In the present invention as described above, the driving unit may be configured to drive at least one of the first support and the second support by a hydraulic cylinder or an electric motor or an electromagnet device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic perspective view of an embodiment of an electrode contact clip provided in the battery charge / discharge system according to the present invention.

Referring to the drawings, the electrode contact clip 20 according to the present invention is basically formed to be able to bite the electrode 13 protruding from the pouch case 10 from the plane direction, are arranged to face each other to The radish is made of at least two pairs of leaf springs (22a, 22c) (22b, 22d) and one of the leaf springs (22a, 22b) on one side of the leaf springs facing each other to support the leaf springs. It is provided with one support 23 and a second support 24 provided at one end of the leaf springs 22c and 22d on the other side to support the leaf springs.

The leaf springs 22a, 22b, 22c, and 22d are members that perform charging and discharging of the actual battery, and two pairs of pairs are formed so as to independently support two electrodes formed in one pouch case. In FIG. 2, the first plate spring 22a and the third plate spring 22c form a pair to bite one electrode of the pouch case, and the second plate spring 22b and the fourth plate spring. (22d) is a pair of two of the four leaf springs to bite the other electrode of the pouch case. The pair of leaf springs may be formed to correspond to the number of battery insertion holes provided in the tray of the battery charge and discharge system. 2 illustrates a case in which only one pair of leaf springs is provided, but is not necessarily limited thereto. The plurality of leaf springs shown in FIG. 2 may be disposed to be installed in a charge / discharge system of a battery.

In FIG. 2, the first support 23 supports one end of the first leaf spring 22a and the second leaf spring 22b, and the second support 24 is paired with the first leaf spring 22a. One end portion of the fourth plate spring 22c which forms the third plate spring 22c and the second plate spring 22d that is paired with the second plate spring 22b is supported.

On the other hand, the first support 23 and the second support 24 is formed longer than what can be seen in Figure 2, at a predetermined interval between the first support 23 and the second support (24) Leaf springs may be further installed to be able to charge and discharge a plurality of batteries at a time, by arranging a plurality of pairs of the first support 23 and the second support formed in a row in parallel, n horizontally, n vertically M cells can be charged and discharged.

As described above, the first support 23 and the second support 24 supporting the leaf springs individually may be independently moved by a driving unit separately installed. That is, by connecting the drive unit 30 to at least one of the first support 23 and the second support 24 to be driven in the direction of the leaf spring facing each other as shown in Figure 3a and 3b The leaf springs connected to (23) and (24) are able to bite the electrode of the battery.

3A and 3B, the second support 24 is connected to the driving unit 30 by the connecting table 31, and the first support 23 is fixedly installed. Of course, this is only one embodiment, and a separate driving unit may be connected and driven to the first support 23.

The connecting table 31 is connected to the driving unit 30 to simultaneously drive a plurality of leaf springs are supported in a row or a plurality of leaf springs are fixed in a row, but not shown in the figure A separate connection structure such as a gear structure may be further provided to enable simultaneous driving.

The drive unit 30 may drive the second support 24 by a hydraulic cylinder, and may drive the second support 24 by a gear structure separate from the electric motor. In addition, it can be driven by an electromagnet device as shown in FIG.

That is, a fixing stand 32 is provided at the end of the connecting table 31, and a separate spring 34 is provided to the fixing table 32 to give a repulsive force. In this state, the connecting table 31 and the fixing table 32 are driven by the electromagnetic coil 33 installed around the connecting table 31 and the fixing table 32.

Meanwhile, a spring member 26 may be installed between the first support 23 and the second support 24 to give a predetermined restoring force. The spring member 26 serves to pull the first support 23 and the second support 24 to use an elastic member such as rubber instead of the spring member.

The electrode contact clip of the present invention as described above is used to charge / discharge a battery inserted in a charge / discharge tray in a charge / discharge system of a battery. At this time, the charging and discharging tray has an insertion portion into which the pouch case of the battery can be inserted, and the insertion portion is provided with a plurality of insertion openings into which the pouch case can be inserted in an inverted or upright state. Therefore, when the insertion hole of the charge / discharge tray has a structure in which the pouch case is inserted in an inverted state, the electrode contact clips of the present invention are disposed so that the first and second support parts 23 and 24 face downward to charge and discharge the battery. If the insertion hole of the charge / discharge tray has a structure for inserting the pouch case in an upright state, the electrode contact clip of the present invention is disposed so that the first and second support parts 23 and 24 face upwards. It will be charged and discharged.

In addition, the electrode contact clip according to the present invention is equally applicable to a tray inserted in a state where the pouch case of the battery is placed horizontally, rather than standing upright or inverted. This is because the electrode contact clip according to the present invention is a type of directly biting the electrode.

According to the electrode contact clip of the battery charge and discharge system according to the present invention as described above, the following effects can be obtained.

First, the tension of the leaf springs in direct contact with the electrode can be prevented from being lowered, so that a plurality of repeated use is possible.                     

Second, it is possible to drive the leaf springs with a small force can reduce the driving installation, thereby preventing the loss of power.

Third, even when charging and discharging the maximum amount of batteries at a time, the productivity of the leaf spring can be improved because the driving of the leaf spring does not take much trouble.

Although the present invention has been described with reference to the embodiments shown in the accompanying drawings, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. . Therefore, the true scope of protection of the present invention should be defined only by the claims shown in the accompanying drawings.

Claims (5)

delete At least two pairs of leaf springs formed to be able to bite each protruding electrode of the battery pouch from both sides thereof and face each other; A first support part supporting one end of the leaf springs on either side of the facing leaf springs; A second support portion supporting one end of the leaf springs of the other side of the leaf springs facing each other; And And a driving part driving at least one of the first support part and the second support part in a direction in which the respective leaf springs face each other so that the leaf springs facing each other abut. An electrode contact clip of a battery charge / discharge system having an elastic member for providing a predetermined elastic force between the first support portion and the second support portion. The method of claim 2, The driving unit is a clip for electrode contact of the battery charge and discharge system, characterized in that for driving at least one of the first support and the second support by a hydraulic cylinder. The method of claim 2, The driving unit is a clip for contacting the electrode of the battery charge and discharge system, characterized in that for operating at least one of the first support and the second support by an electric motor. The method of claim 2, The driving unit is a clip for electrode contact of the battery charge and discharge system, characterized in that for operating at least one of the first support and the second support by an electromagnet device.

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