CN210037908U

CN210037908U - Honeycomb formula current needle

Info

Publication number: CN210037908U
Application number: CN201920560729.2U
Authority: CN
Inventors: 徐立峰
Original assignee: Shengfeng Science And Technology (ningbo) Co Ltd
Current assignee: Shengfeng Science And Technology (ningbo) Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-02-07
Anticipated expiration: 2029-04-24

Abstract

The utility model discloses a honeycomb formula current needle, including the needle axle, the needle cover, needle axle spring and current probe, the one end of needle axle is installed in the needle cover, the needle axle spring is established to the epaxial cover of needle, and the one end of needle axle spring supports and leans on the needle cover, under the exogenic action, the needle axle can move at the axis direction for the needle cover, and can reset under the effect of needle axle spring, the terminal surface of the other end of needle axle has probe installation position, and probe installation position, install current probe in the probe installation position, develop suitable honeycomb formula current needle, set up a plurality of probes, can be abundant with the measured object contact, adapt to anomalous test surface, and easily processing and assembly, improve the data reliability of test, in time know the performance of battery.

Description

Honeycomb formula current needle

Technical Field

The utility model relates to a battery production sets up the field, especially relates to a honeycomb formula current needle that is used for battery test especially lithium cell to test.

Background

With the development of science and technology and society, lithium batteries have become the mainstream of the battery industry due to the unique performance advantages of the lithium batteries. The lithium ion battery is widely applied to portable electric appliances such as notebook computers, video cameras and mobile communication equipment, and a high-capacity lithium ion battery is tried out in electric automobiles, and is expected to become one of main power sources of the electric automobiles in the 21 st century. Therefore, during the production of the lithium battery in an assembly line, the performance test of the lithium battery becomes a key step for determining the market share of the lithium battery, wherein the test of the battery current is extremely critical, the current needle generally adopted in the market at present is not suitable for irregular objects during working, and cannot be in full contact with a measured object, so that the temperature rise of the current needle is too high, the structure is also complex, the processing and the assembly are difficult, and the cost is higher.

Therefore the utility model discloses the inventor aims at inventing a honeycomb formula current probe to the problem that current probe can't be applicable to irregular object when lithium cell current capability test, realizes the lithium cell on the accurate measurement assembly line to according to the effectual performance goodness of aassessment lithium cell of test data.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above disadvantages, an object of the present invention is to provide a honeycomb type current pin.

In order to achieve the above purpose, the utility model discloses a technical scheme is: the utility model provides a honeycomb formula current needle, includes needle axle, needle cover, needle axle spring and current probe, the one end of needle axle is installed in the needle cover, the epaxial cover of needle is established the needle axle spring, just the one end of needle axle spring supports and leans on the needle cover, under the exogenic action, the needle axle can move at the axis direction for the needle cover, and can reset under the effect of needle axle spring, the terminal surface of the other end of needle axle has probe installation position, just probe installation position, install in the probe installation position the current probe.

Preferably, the probe installation position is provided with at least one group, and every group the probe installation position is circular and evenly sets up, and every group the probe installation position includes at least three. Test data for a plurality of orientations is implemented.

Preferably, at least two probe installation positions are added to the circle center position of one group of the probe installation positions, the probe installation positions penetrate through the axial direction of the needle shaft, a voltage probe is installed in the added probe installation positions, and an insulating sheath is added outside the voltage probe. The voltage probe is added, so that synchronous testing of voltage and current can be realized, and the accuracy of testing data is improved.

Preferably, the needle cover includes mounting panel and sleeve pipe, the through-hole has on the mounting panel, the sleeve pipe is fixed to be set up on the mounting panel, just sheathed tube axis with the axial of through-hole is the same, sheathed tube hole size is greater than the size of through-hole, the needle shaft includes second spring portion and third needle cover portion, second spring portion is used for the cover to establish the needle shaft spring, and can pass the through-hole, the size of third needle cover portion is greater than the through-hole, and can pass the sleeve pipe. When the second spring part retracts into the sleeve under the action of external force, the second spring part has buffering effect and can incline at a certain angle.

Preferably, the end face of the mounting plate opposite to the sleeve is provided with a spring fixing position, the spring fixing position is an annular boss and can clamp the needle shaft spring in a clamping mode. The stability of the needle shaft spring is ensured.

Preferably, the needle shaft further comprises a first probe portion and a fourth nut portion, the first probe portion and the fourth nut portion are integrally formed with the second spring portion and the third pillow case portion, a probe mounting position is arranged in the first probe portion, and the fourth nut portion is provided with threads and can fix the needle shaft through a positioning nut. The flexibility of the needle shaft is improved.

Preferably, one side of the positioning nut close to the needle sleeve is provided with a positioning ring, the positioning ring is an annular boss, the outer ring of the annular boss is an inclined surface, and the positioning nut can slide into the needle sleeve along the inclined surface of the positioning ring. The needle sleeve and the positioning nut can return to the original position after being inclined at a certain angle.

The utility model relates to a honeycomb formula current needle's beneficial effect is, develops suitable honeycomb formula current needle, sets up a plurality of probes, can be abundant with the testee contact, adapt to anomalous test face, and easily processing and assembly, improve the data reliability of test, in time know the performance of battery to can control the temperature rise by the test article.

Drawings

FIG. 1 is a schematic diagram of a temperature probe.

Fig. 2 is a schematic structural view of the needle shaft.

Fig. 3 is a schematic view of the structure of the needle guard.

Figure 4 is a cross-sectional view of the needle hub.

Fig. 5 is a schematic structural view of the positioning nut.

In the figure:

1-a needle shaft; 2, covering the needle; 3-needle shaft spring; 4-a current probe; 5-a voltage probe; 6-probe installation position; 7-positioning the nut;

11-a first probe portion; 12-a second spring portion; 13-a third needle sleeve portion; 14-a fourth nut portion;

21-mounting a plate; 22-a sleeve; 23-a through hole; 24-spring fixing position;

71-a retaining ring.

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.

During production of the lithium battery, performance test is required, wherein current test of the lithium battery is critical, safety of the lithium battery during use is determined, and market share of the lithium battery is determined. Current needles used in the market at present are not suitable for irregular objects, cannot be in full contact with a measured object, and therefore the test is inaccurate, and the processing and assembling are difficult and the cost is high.

Therefore, a current probe is required to be developed, which is suitable for the production of irregular tested batteries and must ensure the accuracy and stability of test data.

Referring to fig. 1-5, the honeycomb current needle in this embodiment includes a needle shaft 1, a needle cover 2, a needle shaft spring 3, and a current probe 4, wherein:

as shown in fig. 2, the needle shaft 1 includes a first probe portion 11, a second spring portion 12, a third needle cover portion 13 and a fourth nut portion 14 which are sequentially and integrally formed, a probe mounting position 6 is disposed in the first probe portion 11, the second spring portion 12 is used for covering the needle shaft spring 3, the third needle cover portion 13 is connected with the needle cover 2, the third needle cover portion 13 is larger than the second spring portion 12 in size, and the fourth nut portion 14 is provided with threads and can fix the needle shaft 1 through a positioning nut 7;

as shown in fig. 3 and 4, the needle sleeve 2 comprises a mounting plate 21 and a sleeve 22, the mounting plate 21 is provided with a through hole 23, the sleeve 22 is fixedly arranged on the mounting plate 21, the axial direction of the sleeve is the same as the axial direction of the through hole 23, the hole size of the sleeve is larger than that of the through hole 23, the sleeve is used for mounting the third needle sleeve part 13, the through hole 23 is used for mounting the second spring part 12, and the second spring part 12 is retracted into the sleeve under the action of external force, so that a buffer is provided and a certain angle of inclination can be performed;

the needle shaft spring 3 is a spring, is sleeved on the second spring part 12 and is in contact with the plate surface of the mounting plate 21, and in order to improve the stability of the needle shaft spring 3, a spring fixing position 24 is arranged on the plate surface contacting the mounting plate 21, and the spring fixing position 24 is an annular boss and can just clamp the needle shaft spring 3;

mounting of the current probe 4: the terminal surface of the other end of needle axle 1 has probe installation position 6, and probe installation position 6 is according to two sets of settings, a set of setting is eight, interval 45 degrees, it is circular to form, another group is also eight and interval 45 degrees forms circularly, and two circles are concentric, and 6 cross arrangement in two sets of probe installation positions, the totality is seen promptly, interval 22.5 degrees set up a probe installation position 6, installation current probe 4 in probe installation position 6, realize the test data in a plurality of positions, the accuracy of improvement data.

Considering the voltage test, at least two probe installation positions 6 are added at the circle center position of one group of probe installation positions 6, namely the two probe installation positions 6 are symmetrical about the circle center, the probe installation positions 6 penetrate through the axial direction of the needle shaft 1, the voltage probes 5 are installed in the added probe installation positions 6, the insulating sheaths are added outside the voltage probes 5, the voltage probes 5 can realize the synchronous test of voltage and current, and the accuracy of test data is improved.

As shown in fig. 5, considering that the thicknesses of the third needle sleeve portion 13 and the second spring portion 12 are different, a certain angle of inclination occurs during movement, so that the contact surface can be completely attached, but the positioning is also easily performed when the needle sleeve portion is returned to the original position, so that one side of the positioning nut 7 close to the needle sleeve 2 is provided with a positioning ring 71, the positioning ring 71 is an annular boss, the outer ring of the annular boss is an inclined surface, and the positioning nut 7 can slide into the needle sleeve 2 along the inclined surface of the positioning ring 71, so that the needle sleeve 2 and the positioning nut 7 can be returned to the original position after being inclined at a certain angle.

Basic mode of use: the second spring part 12 of the needle shaft 1 is sleeved with a spring, at this time, the third needle sleeve part 13 and the fourth nut part 14 of the needle shaft 1 sequentially penetrate through the through hole 23 and the sleeve 22 of the mounting plate 21 of the needle sleeve 2 and are fixed through the positioning nut 7, under the action of external force, the needle shaft 1 can move in the axial direction relative to the needle sleeve 2 and can reset under the action of the needle shaft spring 3, when the needle shaft 1 is used, when certain pressure is applied, the needle shaft 1 can retract, because the sleeve 22 is larger than the second spring part 12, the second spring part 12 has certain-angle inclination in the sleeve 22, when an irregular plane is tested, certain buffering can be realized, after the test is finished, the compressed spring is ejected out of the needle shaft 1, and due to the guiding of the inclined surface of the positioning ring 71 on the positioning nut 7, the spring can smoothly enter a proper position.

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 honeycomb current pin, characterized by: including needle axle (1), needle cover (2), needle shaft spring (3) and current probe (4), install in needle cover (2) the one end of needle axle (1), needle shaft spring (3) are established to the cover on needle axle (1), just the one end of needle shaft spring (3) supports and leans on needle cover (2), under the exogenic action, needle axle (1) can move at the axis direction for needle cover (2), and can reset under the effect of needle shaft spring (3), the terminal surface of the other end of needle axle (1) has probe installation position (6), just probe installation position (6), install in probe installation position (6) current probe (4).

2. A cellular current pin according to claim 1, wherein: the probe installation position (6) is provided with at least one group, and every group the probe installation position (6) is circular and evenly arranged, and every group the probe installation position (6) comprises at least three.

3. A cellular current pin according to claim 1, wherein: at least two probe installation positions (6) are added at the circle center positions of one group of probe installation positions (6), the probe installation positions (6) penetrate through the axial direction of the needle shaft (1), voltage probes (5) are installed in the added probe installation positions (6), and insulating sheaths are added outside the voltage probes (5).

4. A cellular current pin according to claim 1, wherein: needle cover (2) include mounting panel (21) and sleeve pipe (22), through-hole (23) have on mounting panel (21), sleeve pipe (22) are fixed to be set up on mounting panel (21), just the axis of sleeve pipe (22) with the axial of through-hole (23) is the same, the hole size of sleeve pipe (22) is greater than the size of through-hole (23), needle axle (1) includes second spring portion (12) and third needle cover portion (13), second spring portion (12) are used for the cover to establish needle axle spring (3), and can pass through-hole (23), the size of third needle cover portion (13) is greater than through-hole (23), and can pass sleeve pipe (22).

5. The honeycomb current pin of claim 4, wherein: and the end face of the mounting plate (21) opposite to the sleeve (22) is provided with a spring fixing position (24), the spring fixing position (24) is an annular boss and can clamp the needle shaft spring (3).

6. The honeycomb current pin of claim 4, wherein: the needle shaft (1) further comprises a first probe portion (11) and a fourth nut portion (14), the first probe portion and the second spring portion (12) and the third pillow cover portion are integrally formed, a probe installation position (6) is arranged in the first probe portion (11), and the fourth nut portion (14) is provided with threads and can fix the needle shaft (1) through a positioning nut (7).

7. The honeycomb current pin of claim 6, wherein: with the needle cover (2) is close to one side of set nut (7) is provided with holding ring (71), holding ring (71) are annular boss, the outer loop of annular boss is the inclined plane, just set nut (7) can be followed the inclined plane of holding ring (71) and slided to in needle cover (2).