CN202177643U - Lithium ion battery internal resistance voltage detection clamp - Google Patents

Abstract

The utility model relates to a fixture for detecting the internal resistance voltage of a lithium ion battery, which belongs to the field of lithium ion battery manufacturing. It includes a base, a strip-shaped copper sheet is arranged on the upper surface of the base, a side limiting plate is arranged on one side of the copper sheet on the upper surface of the base, the side limiting plate is slidingly connected with the surface of the base, and the end surface of the base perpendicular to the side limiting plate An end limiting plate is arranged on the top, an electrode probe is inlaid at one end of the end limiting plate, and the end limiting plate is slidably connected with the end surface of the base. The utility model can be applied to the detection of batteries of different thicknesses and widths, has strong versatility, is convenient, fast, saves time and labor, has high testing accuracy, and is beneficial to the improvement of production efficiency.

Description

A lithium-ion battery internal resistance voltage detection fixture

technical field

The utility model relates to a fixture for detecting the internal resistance voltage of a lithium ion battery, which belongs to the field of lithium ion battery manufacturing.

Background technique

In addition to capacity and thickness, internal resistance and voltage are also important indicators for evaluating the basic performance of lithium-ion batteries. Each lithium-ion battery needs to be tested during the production process to determine whether the battery meets the requirements. At this stage, there are two simple detection methods for the internal resistance and voltage of lithium-ion batteries. One is to directly use the tester to connect two test leads to the positive and negative electrodes of the battery for testing, and the other is to use a fixture with a One fixed contact, one elastic contact, the positive and negative poles of the battery need to be aligned with the two contacts and placed between the two contacts. These two detection methods have high requirements on human beings, and the detection personnel need to be highly concentrated to touch the two electrodes of the battery. The personnel are prone to fatigue, and when the contact position is not controlled properly, it is very likely to cause missed judgments and short circuits. lead to a large loss.

Chinese patent CN201269921Y discloses an integrated tool for testing the internal resistance and open circuit voltage of a lithium-ion battery. The tool is composed of a battery bracket and probes fixed at both ends of the bracket. The probe at one end of the bracket is relatively fixed, and the probe at the other end is fixed with a telescopic adjustment nut. When testing the battery, hold the battery in hand, press the telescopic adjustment nut with the bottom of the battery, and align the electrode on the upper end of the battery with the fixed probe at the other end of the bracket. pin, the telescopic nut springs up, and the battery is clamped between the two probes, and the internal resistance and voltage of the battery can be displayed from the connected tester. This method is very difficult to operate, the upper electrode contact of the battery is very small, and it is not easy to align with the fixed probe on the bracket, which is prone to missed judgments and short circuits. When the detection amount is large, the operator keeps pressing and stretching with his hands Adjusting the nut, hands and arms are prone to fatigue, which affects the efficiency of production.

Chinese patent CN200996989Y discloses a fixture for testing the internal resistance and voltage of lithium-ion batteries. The device consists of a supporting main board, two guide rail sliders, and two test heads are fixed on one end of the main board. When using this fixture to test, the hand does not need to expend too much force, and it is labor-saving and convenient to operate. However, it has obvious defects. The positive and negative test heads of the fixture are fixed on one end surface of the supporting main board. , the two test heads need to be aligned to test, and there is no positioning device on the side of the fixture, so the two test heads cannot be aligned accurately every time, the detection efficiency of this fixture is very low, and it can only be used for one specification For battery cells, batteries of different thicknesses and widths need to be replaced with different test fixtures, which is poor in versatility and wastes a lot.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model provides a test fixture for battery internal resistance and voltage, which can be applied to the detection of batteries of different thicknesses and widths, has strong versatility, is convenient, fast, saves time and labor, and is accurate in testing High, which is conducive to the improvement of production efficiency.

The technical scheme of the utility model is as follows:

A test fixture for internal resistance and voltage of a lithium-ion battery, comprising a base, characterized in that: the upper surface of the base is provided with a strip-shaped copper sheet, and one side of the copper sheet on the upper surface of the base is provided with a side limiting plate, and the side The limiting plate is slidably connected to the surface of the base, and the end surface of the base perpendicular to the side limiting plate is provided with an end limiting plate, one end of the end limiting plate is inlaid with an electrode probe, and the end limiting plate is slidably connected to the end surface of the base.

Preferably, there are two strip-shaped copper sheets arranged in parallel, and the distance between the two copper sheets is greater than or equal to 2.0 cm.

The end limiting plate is provided with a horizontal long hole and a vertical long hole, the end limiting plate is connected with the base through an adjusting nut, and the horizontal long hole and the vertical long hole are respectively passed through by an adjusting nut.

The vertical distance between the upper end of the strip-shaped copper sheet and the end limiting plate is greater than or equal to 5mm.

The length of the end limiting plate is less than or equal to the width of the end surface of the base, and the width is greater than or equal to the thickness of the base.

The side limiting plate is provided with a transverse long hole, the side limiting plate is connected with the base through an adjusting nut, and the adjusting nut passes through the long hole on the side limiting plate.

Preferably, there are 1-2 long horizontal holes on the side limiting plate.

The beneficial effects of the utility model are:

The internal resistance and voltage detection fixture of the lithium-ion battery of the utility model has a simple structure. By adjusting the front and rear positions of the end limit plate to adapt to the positions of the tabs of batteries with different thicknesses, the left and right adjustment of the end limit plate is coordinated with the adjustment of the side limit plate. The left and right distances are suitable for batteries of different widths. The utility model has strong versatility and is suitable for the detection of batteries of different thicknesses and widths. The use of the fixture is convenient, fast, time-saving and labor-saving, and improves the accuracy and production efficiency of battery detection.

Description of drawings

Fig. 1 is the structure schematic diagram of the battery internal resistance voltage detection jig of the utility model;

Fig. 2 is a schematic diagram of the utility model in use;

Among them, 1. Base; 2. Copper sheet; 3. End limit plate; 4. Electrode probe; 5. Side limit plate; 6. End limit plate adjustment nut; 7. Side limit plate adjustment nut; 8 , battery; 9, electrode rivet end.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the utility model is not limited thereto.

Example 1:

A lithium-ion battery internal resistance voltage detection fixture, the structure shown in Figure 1, including a base 1, a copper plate 2, an end limit plate 3 and a side limit plate 5, the copper plate 2 is arranged in the middle of the upper surface of the base 1 Position, the copper sheet 2 is in the shape of a long strip. According to the utility model, preferably, there are two copper sheets 2 to suit battery cells of different widths. The two copper sheets are arranged in parallel, and the distance between the two copper sheets is greater than or equal to 2.0 cm. The side limiting plate 5 is slidingly connected to the upper surface of the base 1. The side limiting plate 5 is arranged on the upper surface of the base 1 and is located on one side of the copper sheet. The side limiting plate 5 is provided with two transverse long holes. The side limiting plate The adjusting nut 7 passes through the long horizontal hole on the side limiting plate 5. According to the width of the battery, the side limiting plate 5 can be moved left and right. When testing, tighten the adjusting nut 7 of the side limiting plate to adjust the side limiting plate. The nut 7 can fix the side limiting plate 5 on the base 1 .

An end limiting plate 3 is arranged on the end surface of the base 1 perpendicular to the side limiting plate 5, and the end limiting plate 3 is slidingly connected with the end surface of the base 1. One end of the end limiting plate 3 is inlaid with an electrode probe 4, and the end limiting plate 3 is inlaid with an electrode probe 4. The plate 3 is provided with a horizontal long hole and a vertical long hole, and the horizontal long hole and the vertical long hole are respectively passed through by the adjustment nut 6 of the end limit plate, and the end limit plate 3 can be adjusted forward and backward according to the thickness of the battery cell. And adapt to the position of the pole ear by adjusting the end limiting plate 3 left and right. The positions of the adjusting end limiting plate 3 and the side limiting plate 5 are applicable to batteries of different thicknesses and widths, and have strong versatility.

The vertical distance between the upper end of the strip-shaped copper sheet 2 and the end limiting plate 3 is greater than or equal to 5mm.

The length of the end limiting plate 3 is less than or equal to the width of the end face of the base 1 , and the width is greater than or equal to the thickness of the base 1 .

When in use, as shown in Figure 2, the electrode rivet end 9 of the battery 8 faces the electrode probe 4 of the jig, and is attached horizontally to the base electrode copper sheet 2 and pushed upward, so that the electrode rivet end 9 is in close contact with the electrode probe 4 of the jig. The battery shell is in close contact with the copper sheet. The shell of the steel shell battery is the negative pole, and the rivet end is the positive pole; the shell of the aluminum shell battery is the positive pole, and the rivet end is the negative pole. Sheet 2 is connected with the negative or positive connecting wire of the tester through lead wires, and the tester can judge whether the internal resistance and voltage of the battery are qualified.

Claims (7)

1. An internal resistance and voltage test fixture of a lithium ion battery, comprising a base, is characterized in that: the upper surface of the base is provided with a strip-shaped copper sheet, and one side of the copper sheet on the upper surface of the base is provided with a side limiting plate, The side limiting plate is slidably connected to the surface of the base, the end surface of the base perpendicular to the side limiting plate is provided with an end limiting plate, the end limiting plate is embedded with electrode probes, and the end limiting plate is slidably connected to the end surface of the base. 2. The internal resistance and voltage test fixture of a lithium-ion battery according to claim 1, characterized in that: two strip-shaped copper sheets are arranged in parallel, and the distance between the two copper sheets is greater than or equal to 2.0cm . 3. The internal resistance and voltage test fixture of a lithium ion battery according to claim 1, characterized in that: the end limiting plate is provided with a horizontal long hole and a vertical long hole, and the end limiting plate passes through The adjusting nut is connected with the base, and the adjusting nut passes through the horizontal long hole and the vertical long hole respectively. 4 . The internal resistance and voltage test fixture of a lithium-ion battery according to claim 1 , wherein the distance between the upper end of the strip-shaped copper sheet and the end-limiting plate is greater than or equal to 5 mm. 5. The internal resistance and voltage test fixture of a lithium-ion battery according to claim 1, wherein the length of the end limiting plate is less than or equal to the width of the end face of the base, and the width is greater than or equal to the thickness of the base. 6. The internal resistance and voltage test fixture of a lithium-ion battery according to claim 1, characterized in that: the side limiting plate is provided with a horizontal long hole, and the side limiting plate is connected to the base through an adjusting nut , the adjusting nut passes through the long hole on the side limiting plate. 7 . The internal resistance and voltage test fixture of a lithium-ion battery according to claim 3 , wherein the number of horizontal long holes on the side limiting plate is 1-2. 8 .