CN103134956B - A kind of fixture for testing soft-package battery electrical property - Google Patents

Abstract

The invention discloses a fixture for testing the electrical performance of a soft-pack battery, which includes an insulating main board, a positive connection device and a negative connection device arranged on the insulating main board, and the positive connection device corresponds to the positive tab of the soft-pack battery, and the negative The connection device corresponds to the negative tab of the pouch battery. Both the positive connection device and the negative connection device include: a gasket connected to the insulating main board; a conductive voltage sheet stacked on the upper layer of the gasket. The two bolts arranged at the two ends are connected, and the upper surface of the conductive voltage sheet is provided with at least two poles, and at least one pole is provided with external threads, and the nuts that are compatible with the external threads can The current test terminal of the test equipment is compressed between the nut and the conductive voltage sheet. With such arrangement, the jig for testing the electrical performance of the pouch battery disclosed by the present invention can effectively simplify the testing process of the pouch battery and can provide stable test data.

Description

A jig for testing the electrical properties of pouch batteries

technical field

The invention relates to the technical field of battery performance testing, in particular to a fixture for testing the electrical performance of a pouch battery.

Background technique

In recent years, with the rapid development of economic construction, the world's oil reserves have declined rapidly. In order to alleviate the energy crisis, electric vehicles have become one of the most ideal means of transportation for people.

Soft-pack batteries are the core components of electric vehicles, and the performance of soft-pack batteries directly affects the battery life of electric vehicles. Electrical performance testing is an important item to test the performance of pouch batteries. The following content will introduce the electrical performance testing methods of pouch batteries in the prior art in detail.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of the connection structure between the test equipment and the pouch battery in the prior art.

The pouch battery includes two positive tabs 01 and negative tabs 02. The two tabs are metal conductors drawn from the battery cell. The positive tab 01 and the negative tab 02 are used for charging and discharging the pouch battery. Contact point. In the prior art, in order to conveniently connect the positive pole tab 01 and the negative pole tab 02 with testing equipment, through holes are usually opened on the above two tabs. The test terminals of the test equipment usually adopt Cu (copper) terminals, and the two current test terminals of the test equipment are provided with through holes corresponding to the through holes opened on the above two tabs. When performing the current test of the pouch battery, connect the two current test terminals to the positive tab 01 and the negative tab 02 in a one-to-one correspondence with bolts and nuts.

When performing the voltage test of the pouch battery, it is only necessary to clamp the voltage test clamp of the test equipment to the positive and negative tabs of the pouch battery pack.

However, in the prior art, the positive tab 01 and the negative tab 02 of the pouch battery need to be punched separately for current testing, and the testing process is complicated. In addition, the current test terminals are respectively connected to the above two tabs by means of bolts and nuts, and the contact area between the current test terminals and the tabs is small, which leads to unstable test data when a large current test is performed.

Therefore, how to solve the problems of complicated test process and unstable test data of pouch battery in the prior art has become an important technical problem to be solved by those skilled in the art.

Contents of the invention

In order to solve the above technical problems, the present invention provides a jig for testing the electrical properties of pouch batteries, which can effectively simplify the testing process of pouch batteries and provide stable test data.

The invention provides a fixture for testing the electrical performance of a pouch battery, comprising an insulating main board, a positive connection device and a negative connection device arranged on the insulating main board, and the positive connection device is connected to the positive connection device of the pouch battery Corresponding to the tabs, the negative connection device corresponds to the negative tab of the pouch battery, and both the positive connection device and the negative connection device include:

a gasket connected to the insulating main board;

A conductive voltage sheet superimposed on the upper layer of the gasket, the conductive voltage sheet and the gasket are connected by two bolts arranged close to the two ends of the two, and the upper surface of the conductive voltage sheet is set There are at least two poles, and at least one of the poles is provided with an external thread, and a nut adapted to the external thread can press the current test terminal of the test device between the nut and the conductive voltage sheet between.

Preferably, both the positive connection device and the negative connection device are provided with three poles, the three poles are evenly distributed, and one of the poles is provided with an external thread.

Preferably, a plurality of heat dissipation through holes are opened on the insulating main board.

Preferably, the gasket is a copper gasket.

Preferably, the conductive voltage piece is a copper pressure piece.

Preferably, an insulating plate is interposed between the positive connection device and the negative connection device.

Preferably, the pole is welded to the upper surface of the conductive voltage sheet.

Preferably, the gasket is bonded to the insulating main board.

The invention provides a fixture for testing the electrical performance of a pouch battery, comprising an insulating main board, a positive connection device and a negative connection device arranged on the insulating main board, and the positive connection device is connected to the positive connection device of the pouch battery Corresponding to the tabs, the negative connection device corresponds to the negative tab of the pouch battery, and both the positive connection device and the negative connection device include: a gasket connected to the insulating main board; The conductive voltage sheet on the upper layer of the gasket, the conductive voltage sheet and the gasket are connected by two bolts arranged close to the two ends, and the upper surface of the conductive voltage sheet is provided with at least two poles, and at least one of the poles is provided with an external thread, and a nut adapted to the external thread can press the current test terminal of the test device between the nut and the conductive voltage sheet.

So set up, using the jig for testing the electrical properties of the pouch battery provided by the present invention, when testing, the pouch battery is placed on the insulating main board, and the positive pole tab and the negative pole tab of the pouch battery are respectively connected to the insulation The positive and negative connectors on the main board are placed correspondingly. Then, unscrew the bolt used to connect the gasket and the conductive voltage sheet, so that the positive electrode tab and the negative electrode tab can be accommodated between the conductive voltage sheet and the gasket, and extend the positive electrode tab and the negative electrode tab of the pouch battery respectively. Insert it into the gap between the conductive voltage sheet and the gasket, and tighten the bolts, the positive pole lug and the negative pole lug can be compressed between the conductive voltage sheet and the gasket. Then press the current test terminal of the test equipment between the nut and the conductive voltage sheet through the nut, and clamp the voltage test terminal of the test equipment to another pole.

Apparently, the jig provided by the present invention for testing the electrical properties of the pouch battery does not need to punch holes in the positive tab and the negative tab of the pouch battery, and the contact area between the conductive voltage sheet and the tab is relatively large, which can Effectively guarantee the stability of the test current. Therefore, the present invention provides a jig for testing the electrical properties of the pouch battery, which can effectively simplify the testing process of the pouch battery and provide stable test data.

Description of drawings

Fig. 1 is a schematic diagram of the connection structure between the test equipment and the pouch battery in the prior art;

Fig. 2 is a schematic structural diagram of a jig for testing the electrical properties of a pouch battery in a specific embodiment of the present invention.

detailed description

The invention provides a jig for testing the electrical performance of a pouch battery, which can effectively simplify the test process of the pouch battery and provide stable test data.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of a jig for testing the electrical performance of a pouch battery in a specific embodiment of the present invention.

The jig for testing the electrical properties of the pouch battery provided in this specific embodiment includes an insulating main board 11 , a positive connection device 12 and a negative connection device 13 arranged on the insulating main board 11 .

It should be noted that the positive connection device 12 and the negative connection device 13 respectively correspond to the positive tab and the negative tab of the pouch battery, that is, the positive connection device 12 is used to connect the positive tab of the pouch battery, and the negative connection device 13 It is used to connect the negative tab of the pouch battery.

Both the positive connection device 12 and the negative connection device 13 include a gasket 14 and a conductive voltage sheet 15 , wherein the gasket 14 is connected to the insulating main board 11 , and the conductive voltage sheet 15 is stacked on the upper layer of the gasket 14 . The conductive voltage sheet 15 and the gasket 14 are connected by two bolts 16 , wherein the two bolts 16 are respectively close to the two ends of the conductive voltage sheet 15 and the gasket 14 .

The upper surface of the conductive voltage sheet 15 is provided with at least two poles 17, wherein the outer peripheral surface of at least one pole 17 is provided with an external thread, and a nut 18 adapted to the external thread can press the current test terminal of the test equipment on the Between the nut 18 and the conductive voltage sheet 15 .

Set up in this way, use the jig for testing the electrical performance of the pouch battery provided in this specific embodiment. When testing, place the pouch battery on the insulating main board 11, and connect the positive tab of the pouch battery to the negative pole. The ears are respectively placed corresponding to the positive connection device 12 and the negative connection device 13 on the insulating main board 11 .

Then, unscrew the bolt 16 that is used to connect the gasket 14 and the conductive voltage piece 15, so that the positive pole lug and the negative pole lug can be accommodated between the conductive voltage piece 15 and the gasket 14, and the positive pole lug and the negative pole lug of the pouch battery The negative tabs extend into the gap between the conductive voltage sheet 15 and the gasket 14 respectively, and the bolts 16 are tightened, and the positive and negative electrode tabs can be compressed between the conductive voltage sheet 15 and the gasket 14 . Then the current test terminal of the test equipment is pressed between the nut 18 and the conductive voltage sheet 15 through the nut 18, and the voltage test terminal of the test equipment is clamped to other poles.

Apparently, the jig for testing the electrical performance of the pouch battery provided in this specific embodiment does not need to perforate the positive tab and the negative tab of the pouch battery, and the contact area between the conductive voltage sheet 15 and the tab is Larger, can effectively ensure the stability of the test current. Therefore, the jig for testing the electrical properties of the pouch battery provided in this specific embodiment can effectively simplify the testing process of the pouch battery and can provide stable test data.

It should be noted that due to different types of pouch batteries, the sizes of the tabs are different. During the test, the smaller the distance between the current test terminal and the voltage test terminal of the test equipment and the tab, the more accurate the measured data.

In view of this, the poles 17 provided on the conductive voltage sheet 15 provided in this specific embodiment can be multiple, and the plurality of poles 17 are evenly distributed on the upper surface of the conductive voltage sheet 15, for example, the poles 17 can be Specifically, there are three, one of which is provided with an external thread for connecting with a current test terminal, and three poles 17 are evenly distributed on the upper surface of the conductive voltage sheet 15 .

With this arrangement, according to the size of the lugs of the pouch battery, the poles closer to the lugs of the battery can be selected to be connected to the test terminals of the test equipment, which effectively improves the application range of the test fixture provided in this specific embodiment.

Of course, the number of poles 17 provided in this specific embodiment can also be other numbers, such as four, five, etc., and the poles with external threads can also be two, three, etc. The specific number of poles is not specifically limited, and its specific number can be specifically set according to the actual situation.

In addition, it should be noted that the insulating main board 11 is used to hold the pouch battery. During the test, the pouch battery will emit heat. In order to make the heat emitted by the pouch battery dissipate to the outside as soon as possible, so as to avoid the temperature rise of the pouch battery affect the test data.

In the test fixture provided in this specific embodiment, a plurality of heat dissipation through holes 111 are opened on the insulating main board 11, so that when the electrical performance test of the pouch battery is performed, the heat emitted by the pouch battery can pass through the heat dissipation through holes 111 as soon as possible. Dissipate into the outside air, effectively improving the heat dissipation performance of the test fixture.

In addition, it should be noted that the gasket 14 provided in this specific embodiment can be specifically a copper gasket. It should be understood that the copper gasket has good electrical conductivity, and the current released by the pouch battery can pass through the copper gasket. The sheet is conducted to the conductive voltage sheet 15, and then to the test terminal of the test equipment. The copper gasket can effectively reduce the loss of current during the conduction process, and effectively ensure the accuracy of the test.

In addition, in order to reduce the loss of current during conduction, the conductive voltage sheet 15 provided in this specific embodiment may also be a copper pressing sheet. Of course, the gasket 14 and the conductive voltage sheet 15 can also be gaskets and conductive voltage sheets of other materials, as long as they have better electrical conductivity.

In order to prevent the contact between the positive connection device 12 and the negative connection device 13 during the test, thereby causing the short circuit of the battery, the jig for testing the electrical properties of the pouch battery provided in this specific embodiment, the positive connection device 12 and the negative connection device An insulating plate 19 is arranged between the connection devices 13 . The insulating board 19 may specifically be a wood board, of course, it may also be an insulating board made of other materials, such as insulating rubber, insulating glass, and the like.

In this way, the insulating plate 19 is separated between the positive connecting device 12 and the negative connecting device 13 , which can effectively avoid the problem that the positive connecting device 12 and the negative connecting device 13 come into contact, thereby causing a short circuit of the battery.

In addition, in the jig for testing the electrical properties of the pouch battery provided in this specific embodiment, its pole 17 can be connected to the upper surface of the conductive voltage sheet 15 by welding. Of course, other methods can also be used, such as adhesive Connecting, casting and so on. In addition, the spacer 14 can be connected to the insulating main board 11 by bonding, and of course, the spacer 14 can also be connected to the insulating main board 11 by riveting, screw connection and the like.

A fixture for testing the electrical properties of pouch batteries provided by the present invention has been described above in detail. In this paper, specific examples are used to illustrate the principles and implementation methods of the present invention. The descriptions of the above examples are only for assistance. Understand the method of the present invention and its core idea. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (8)

1. A fixture for testing the electrical properties of a pouch battery, characterized in that it includes an insulating main board, a positive connection device and a negative connection device arranged on the insulating main board, and the positive connection device is connected to the pouch battery Corresponding to the positive tab of the pouch battery, the negative connecting device corresponds to the negative tab of the pouch battery, and both the positive connecting device and the negative connecting device include: a gasket connected to the insulating main board; A conductive voltage sheet superimposed on the upper layer of the gasket, the conductive voltage sheet and the gasket are connected by two bolts arranged close to the two ends of the two, and the upper surface of the conductive voltage sheet is set There are at least two poles, and at least one of the poles is provided with an external thread, and a nut adapted to the external thread can press the current test terminal of the test device between the nut and the conductive voltage sheet between. 2. A fixture for testing the electrical performance of a pouch battery as claimed in claim 1, wherein said positive connection device and said negative connection device are all provided with three said poles, three said poles The poles are evenly distributed, and one of the poles is provided with an external thread. 3. A jig for testing the electrical performance of a pouch battery according to claim 1, wherein a plurality of heat dissipation through holes are opened on the insulating main board. 4. A jig for testing the electrical performance of a pouch battery according to claim 3, wherein the gasket is a copper gasket. 5 . A jig for testing the electrical properties of pouch batteries according to claim 4 , wherein the conductive voltage piece is a copper pressure piece. 6 . 6. A jig for testing the electrical performance of a pouch battery according to any one of claims 1-5, wherein an insulating plate is placed between the positive connection device and the negative connection device. 7. A jig for testing the electrical performance of a pouch battery according to claim 6, wherein the pole is welded to the upper surface of the conductive voltage sheet. 8 . The jig for testing the electrical performance of the pouch battery according to claim 7 , wherein the gasket is bonded to the insulating main board.