CN210222092U

CN210222092U - Four-pin set for lithium battery test

Info

Publication number: CN210222092U
Application number: CN201920544398.3U
Authority: CN
Inventors: Lifeng Xu; 徐立峰
Original assignee: Shengfeng Science And Technology (ningbo) Co Ltd
Current assignee: Shengfeng Science And Technology (ningbo) Co Ltd
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2020-03-31
Anticipated expiration: 2029-04-22

Abstract

The utility model discloses a four-pin group for lithium battery test, including probe and fixed part, fixed part includes fixing base and connection flat board, and the fixing base is fixed at connection flat board lower extreme, is provided with corresponding four through-holes respectively on fixing base and the connection flat board, inserts a probe in each through-hole respectively, and the crimping of probe upper end is on the battery that awaits measuring, and lower extreme and test fixture communication connection, the probe includes two parallelly connected current needles and two voltage needles of establishing ties, and the current needle lower extreme is connected with the current test end of test fixture, and the voltage test end of voltage needle lower extreme and test fixture is connected; two connecting columns are arranged on one group of diagonal lines of the connecting flat plate, the connecting columns face the direction of the fixing seat, two arc-shaped positioning grooves are arranged on the other group of diagonal lines of the connecting flat plate, and concave surfaces of the two arc-shaped positioning grooves are opposite. The two voltage pins of the two current pins have good stability, convenient positioning and fine adjustment of the position.

Description

Four-pin set for lithium battery test

Technical Field

The utility model relates to a lithium cell testing arrangement, in particular to four needle groups are used in lithium cell test.

Background

In the production process of the lithium battery, the charging and discharging of the semi-finished product of the battery and the detection of voltage, current and resistance are required, and one key operation for realizing the detection is to contact a probe of a detection tool with the positive electrode and the negative electrode of the battery and read related data by an instrument. The existing test probe set is usually fixed on a test fixture through threads or bolts, a positioning device is lacked, the position can not be finely adjusted after connection, and the connection is not accurate.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model aims to provide a lithium battery test of easy location installation is with four needle groups.

In order to achieve the above purpose, the utility model discloses a technical scheme is: a four-pin group for lithium battery test, includes probe and fixed part, its characterized in that: the fixing component comprises a fixing seat and a connecting flat plate, the fixing seat is fixed on the lower end face of the connecting flat plate, four corresponding through holes are respectively formed in the fixing seat and the connecting flat plate, a probe is respectively inserted into each through hole, the upper end of each probe is pressed on a battery to be tested, the lower end of each probe is in communication connection with a testing fixture, each probe comprises two parallel current pins and two series voltage pins, the lower ends of the current pins are in communication connection with the current testing end of the testing fixture, and the lower ends of the voltage pins are in communication connection with the voltage testing end of the testing fixture; the connecting plate is characterized in that two connecting columns are arranged on one group of diagonal lines of the connecting plate, the connecting columns face the direction of the fixed seat, two arc-shaped positioning grooves are arranged on the other group of diagonal lines of the connecting plate, and concave surfaces of the two arc-shaped positioning grooves are opposite.

The beneficial effects of the utility model are that, two voltage needles can continue to use under one of them damaged condition, improve the rate of utilization, and two electric current needles are resisted and are hindered the ability reinforce, and the whole commonality of probe group is high. And the connecting column is arranged, so that the probe set is positioned when the probe set is convenient to install, and the arc-shaped positioning groove is convenient to position and then finely adjusts the position of the probe set, fixes the probe set at the optimal position and protects the probe.

Preferably, the probe comprises a needle sleeve, a needle rod, a needle head and a spring, wherein the needle rod is sleeved and fixed in the needle sleeve, and the needle head is sleeved at the upper end of the needle rod and is in sliding connection with the needle rod; the spring is sleeved outside the needle rod and arranged between the needle sleeve and the needle head. The probe is a spring needle and is in flexible contact with the battery electrode, so that the battery tab can be protected.

Preferably, the upper end of the needle sleeve is provided with a first convex edge along the outer circumference direction, the lower end of the needle head is provided with a second convex edge, one end of the spring is fixed on the first convex edge, and the other end of the spring is fixed on the second convex edge.

Preferably, the needle bar is phosphor copper, and the needle sleeve is brass. The conductivity is good, and is firm.

Preferably, the probe is fixed to the fixing member by a needle sheath.

Preferably, the fixing seat, the connecting flat plate and the connecting column are integrally formed plastic products.

Preferably, the needle head of the current needle is beryllium copper, is in a tooth shape, and has thirty-five tooth tips, and the distance between the tooth tips is 0.75 mm. The contact area of the current pin and the battery tab is increased.

Preferably, the tip of the voltage needle is circular.

Drawings

Fig. 1 is a schematic structural diagram of a four-pin set for testing a lithium battery according to the present embodiment;

FIG. 2 is a top view of a four-pin set for testing a lithium battery according to the present embodiment;

FIG. 3 is a schematic view of the probe structure of the present embodiment;

fig. 4 is another perspective view of a four-pin set for testing a lithium battery according to the present embodiment.

In the figure:

1-a fixed part, 2-a probe, 21-a needle sleeve, 22-a needle rod, 23-a needle head, 24-a spring, 25-a first convex edge, 26-a second convex edge, 3-a fixed seat, 4-a connecting flat plate, 5-a connecting column and 6-an arc-shaped positioning through groove.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1 to 4, the four-pin set for testing a lithium battery in the present embodiment includes a fixing member 1 and a probe 2. The fixing part comprises a fixing seat 3 and a connecting plate 4, the fixing seat 3 is fixed on the lower end face of the connecting plate 4, the fixing seat 3 and the connecting plate 4 are integrally formed, and the fixing seat is integrally of an inverted convex type and made of plastic materials. The fixing seat 3 and the connecting flat plate 4 are respectively provided with four corresponding through holes, each through hole is respectively inserted with one probe 2, and each probe 2 comprises two voltage needles connected in parallel and two current needles connected in series. Two voltage pins are arranged diagonally on the fixed part 1 and two current pins are arranged diagonally on the other diagonal on the fixed part 1. The upper end of the probe 2 is connected to a battery to be tested in a pressing mode, the lower end of the probe is in communication connection with the test fixture, the lower end of the current pin is connected with a current test end of the test fixture, and the voltage pin is connected with a voltage test end of the test fixture. Two connecting columns 5 are arranged on one group of diagonal lines of the connecting flat plate 4, the connecting columns 5 face the direction of the fixing seat 3, two arc-shaped positioning through grooves 6 are arranged on the other group of diagonal lines of the connecting flat plate 4, and concave surfaces of the two arc-shaped positioning through grooves 6 are opposite. When the four-pin group is installed on a test fixture, the four-pin group is roughly positioned through the connecting column 5, and the bolt groove is the arc-shaped positioning through groove 6, then the fixing part 1 is finely adjusted, and after the four-pin group is aligned, the four-pin group is fixed through the bolts for testing.

The probe 2 comprises a needle sleeve 21, a needle rod 22, a needle head 23 and a spring 24, wherein the needle sleeve 21 is in a hollow column shape and is made of brass, the needle rod 22 is fixed in the needle sleeve 21, and the needle rod 22 is made of phosphor copper. The needle 23 is sleeved on the upper end of the needle rod 22 and can slide up and down along the needle rod 22. The spring 24 is sleeved outside the needle rod 22 and fixed between the needle sleeve 21 and the needle 23. The upper end of the needle sleeve 21 is provided with a first convex edge 25 along the outer circumference direction, the lower end of the needle 23 is provided with a second convex edge 26, one end of the spring 24 is fixed on the first convex edge 25, and the other end is fixed on the second convex edge 26. The probe 2 is integrally plated with gold, the needle cover 21 is plated with nickel, and the spring 24 is a stainless steel wire without plating.

The probe 2 is fixed on the fixing part 1 through a needle sleeve 21, and the needle sleeve 21 penetrates through a through hole on the fixing part 1. The fixing seat 3, the connecting flat plate 4 and the connecting column 5 are integrally formed plastic products.

The needle head 23 of the current needle is made of beryllium copper and is in a tooth shape, thirty-five tooth tips are arranged, and the distance between the tooth tips is 0.75 mm. The needle head 23 of the voltage needle is made of phosphor copper and is round.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. A four-pin group for lithium battery testing, comprising a fixing part (1) and a probe (2), characterized in that: the fixing part comprises a fixing seat (3) and a connecting flat plate (4), the fixing seat (3) is fixed on the lower end face of the connecting flat plate (4), four corresponding through holes are respectively formed in the fixing seat (3) and the connecting flat plate (4), and a probe (2) is respectively inserted into each through hole; the upper end of the probe (2) is in compression joint with a battery to be tested, the lower end of the probe is in communication connection with the test fixture, the probe (2) comprises two parallel current pins and two series voltage pins, the lower end of each current pin is in communication connection with the current test end of the test fixture, and the lower end of each voltage pin is in communication connection with the voltage test end of the test fixture; be provided with two spliced poles (5) on connecting a set of diagonal of dull and stereotyped (4), spliced pole (5) are towards fixing base (3) direction, it leads to groove (6) to be provided with two arc location on another group diagonal of connecting dull and stereotyped (4), two to the groove (6) concave surface is relative in the arc location.

2. The four-pin set for testing lithium batteries according to claim 1, wherein: the probe (2) comprises a needle sleeve (21), a needle rod (22), a needle head (23) and a spring (24), the needle rod (22) is fixed in the needle sleeve (21), and the needle head (23) is sleeved at the upper end of the needle rod (22) and is in sliding connection with the needle rod (22); the spring (24) is sleeved outside the needle rod (22) and arranged between the needle sleeve (21) and the needle head (23).

3. The four-needle set for lithium battery testing as claimed in claim 2, wherein the upper end of the needle sheath (21) is provided with a first convex edge (25) along the outer circumference direction, the lower end of the needle (23) is provided with a second convex edge (26), one end of the spring (24) is fixed on the first convex edge (25), and the other end is fixed on the second convex edge (26).

4. The four-needle set for testing lithium batteries according to claim 2, wherein the needle bar (22) is phosphor copper and the needle sleeve (21) is brass.

5. The four-pin set for testing lithium batteries according to claim 2, wherein: the probe (2) is fixed on the fixing part (1) through a needle sleeve (21).

6. The four-pin set for testing lithium batteries according to claim 1, wherein: the fixing seat (3), the connecting flat plate (4) and the connecting column (5) are integrally formed plastic products.

7. The four-pin set for testing lithium batteries according to claim 2, wherein: the needle head (23) of the current needle is made of beryllium copper and is in a tooth shape, thirty-five tooth tips are arranged, and the distance between the tooth tips is 0.75 mm.

8. The four-pin set for testing lithium batteries according to claim 2, wherein: the needle head (23) of the voltage needle is made of phosphor copper and is circular.