CN211206582U - Battery voltage and internal resistance testing tool - Google Patents

Abstract

The application discloses battery voltage, internal resistance test fixture, which comprises a base, be provided with two probe seats that separate from each other about the base and arrange, every all install on the probe seat: at least three first probes arranged at intervals along a first circumference, at least three second probes arranged at intervals along a second circumference, and at least three third probes arranged at intervals along a third circumference; the first circumference, the second circumference and the third circumference are coaxially arranged, the diameters of the first circumference, the second circumference and the third circumference are sequentially increased, the first probe, the second probe and the third probe are all telescopic spring probes, the head part of the first probe is higher than the head part of the second probe, and the head part of the second probe is higher than the head part of the third probe. The application discloses test fixture can test the voltage and the internal resistance of various diameter cylindrical batteries.

Description

Battery voltage and internal resistance testing tool

Technical Field

The application relates to a battery voltage and internal resistance testing tool.

Background

The internal resistance and the voltage are important parameters for representing the performance of the battery, and the quality of the battery can be judged only after the parameters of the battery are accurately obtained. However, in the prior art, the voltage and internal resistance of a battery, especially a cylindrical battery, is tested by a testing fixture which can only clamp and fix a battery with a certain diameter (thickness), and if another battery with another diameter (thickness) is measured, the corresponding testing device or testing fixture must be replaced.

Disclosure of Invention

The purpose of the application is: the battery voltage and internal resistance testing tool can test the voltage and internal resistance of cylindrical batteries with various diameters.

The technical scheme of the application is as follows:

the utility model provides a battery voltage, internal resistance test fixture, includes the base, be provided with two probe seats that separate from top to bottom and arrange on the base, every all install on the probe seat:

at least three first probes spaced apart along a first circumference,

at least three second probes spaced along a second circumference, an

At least three third probes arranged at intervals along a third circumference;

the first circumference, the second circumference and the third circumference are coaxially arranged, the diameters of the first circumference, the second circumference and the third circumference are sequentially increased, the first probe, the second probe and the third probe are all telescopic spring probes, the head part of the first probe is higher than the head part of the second probe, and the head part of the second probe is higher than the head part of the third probe.

On the basis of the technical scheme, the application also comprises the following preferable scheme:

the number of the first probe, the second probe and the third probe is increased in sequence.

Each probe seat is provided with 4 first probes, 10 second probes and 15 third probes.

The first probe, the second probe, and the third probe each include:

the needle sleeve is provided with a needle cover,

a needle rod with a tail end inserted in the needle sleeve and a front end positioned outside the needle sleeve, and

the spring is accommodated in the needle sleeve and is connected with the needle sleeve and the needle rod;

the needle sleeve is fixedly connected with the probe seat.

The probe seat is provided with a plurality of probe mounting holes, and the needle sleeve is fixedly mounted in the probe mounting holes.

The base comprises a bottom plate and a vertical plate, the bottom plate is horizontally arranged, the vertical plate is vertically fixed to the upper portion of the bottom plate, and the two probe seats are arranged on the vertical plate.

The lower probe seat is fastened with the vertical plate, a vertically extending long seam is formed in the vertical plate, a screw penetrating through the long seam is fixedly arranged on the upper probe seat, and the screw is connected with a locking nut.

And the vertical plate is provided with scale marks corresponding to the long slits.

The first probe, the second probe and the third probe are all connected with a detection lead, and the detection lead is connected with a voltage and internal resistance test instrument.

The application has the advantages that:

1. this application is through installing many probes on the probe seat to arrange these probes according to certain structure rule, thereby make this test fixture it can test the voltage and the internal resistance of various diameter cylindrical batteries, and can not appear the short circuit problem in the test procedure.

2. The upper probe seat of the test tool is adjustable in height, so that the tool can test the voltage and the internal resistance of batteries with various lengths.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a general assembly diagram of a test fixture in an embodiment of the present application;

FIG. 2 is an exploded view of a test fixture in an embodiment of the present application;

FIG. 3 is a partial exploded view of the test fixture in the embodiment of the present application;

wherein: 1-a first probe, 2-a second probe, 3-a third probe, 123 a-a needle sleeve, 123 b-a needle rod, 4-a base, 401-a bottom plate, 402-a vertical plate, 402 a-a long seam, 5-a probe seat, 501-a probe mounting hole, 502-a screw rod, 6-a locking nut and 7-a detection lead.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.

Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Fig. 1 to 3 show an embodiment of the battery voltage and internal resistance testing tool according to the present invention, which is the same as the conventional battery voltage and internal resistance testing tool, and the tool also includes a base 4, two probe holders 5 arranged at an upper and a lower interval are installed on the base 4, a downward extending probe is installed on the upper probe holder 5, and an upward extending probe is installed on the lower probe holder. Each probe is connected with a detection lead 7, the detection lead 7 is connected with a voltage internal resistance test instrument, namely, each probe is connected with the voltage internal resistance test instrument through the detection lead 7.

The key improvement of this embodiment is that a plurality of probes are mounted on each of the two probe holders 5, and the probes are regularly distributed on the probe holders 5, specifically:

each probe seat 5 is provided with: 4 first probes 1 arranged at intervals along a first circumference, 10 second probes 2 arranged at intervals along a second circumference, and 15 third probes 3 arranged at intervals along a third circumference. The first circumference, the second circumference and the third circumference are coaxially arranged, the diameters of the first circumference, the second circumference and the third circumference are sequentially increased, namely, the diameter of the second circumference is larger than that of the first circumference, the diameter of the third circumference is larger than that of the second circumference, the first probe 1, the second probe 2 and the third probe 3 are all telescopic spring probes (compressed and shortened, non-pressure and extended), the head part of the first probe 1 is higher than that of the second probe 2, and the head part of the second probe 2 is higher than that of the third probe 3.

It is obvious that in the present embodiment, the first probe 1 on the probe base 5 forms a small probe ring located at the innermost side, the second probe 2 forms a middle probe ring located at the middle, the third probe 3 forms a large probe ring located at the outermost side, and the axial extension heights of the small probe ring, the middle probe ring and the large probe ring are sequentially decreased.

If a cylindrical battery with a small diameter (such as a battery of 18650 or 21700 type) is subjected to voltage and internal resistance tests, the battery is clamped between an upper small probe ring and a lower small probe ring, wherein the upper small probe ring abuts against the positive end face of the battery, the lower small probe ring abuts against the negative end face of the battery, and the upper small probe ring and the lower small probe ring do not contact with the battery shell. Because the axial height of the peripheral middle probe ring and the peripheral large probe ring is lower, the middle probe ring and the large probe ring can not contact the shell of the battery to be tested (if the peripheral probe contacts the electrified battery shell, a short-circuit accident can occur).

If a cylindrical battery with a medium diameter (for example, a battery with a diameter of 32 mm) is subjected to voltage and internal resistance tests, the battery is clamped between the upper small probe ring and the middle probe ring and between the lower small probe ring and the middle probe ring, and the large probe ring with a lower peripheral height does not contact a charged shell of the battery to be tested to cause short circuit.

If the voltage and the internal resistance of the cylindrical battery with a large diameter are tested, the battery is clamped between all the probes above and all the probes below, and all the probes are abutted against the positive end face or the negative end face of the battery without contacting a charged battery shell to cause short circuit.

Each of the first probe 1, second probe 2 and third probe 3 described above includes a needle hub 123a, a needle shaft 123b and a spring. The needle sheath 123a is fixedly connected with the probe seat 5, the tail end of the needle rod 123b is inserted into the needle sheath, the front end of the needle rod 123b is located outside the needle sheath, and the spring (not shown in the figure) is accommodated inside the needle sheath and connected with the needle sheath and the needle rod. When the needle bar 123b receives an axially inward pressure, the needle bar 123b presses the spring to move towards the interior of the needle hub, shortening the length of the probe; when the pressure is released, the needle shaft 123b is moved outward by the spring force, and the probe length is increased.

The probe base 5 is formed with a plurality of probe mounting holes 501, and the needle sheath 123a is fixedly mounted in the probe mounting holes 501.

The base 4 includes a bottom plate 401 and a vertical plate 402 vertically fixed on the top of the bottom plate, and the two probe holders 5 are both mounted on the vertical plate 402.

Further, the lower probe base 5 is fastened to the vertical plate 402, and the mounting position of the upper probe base 5 on the vertical plate 402 is adjustable up and down: two vertically extending long slits 402a are formed in the vertical plate 402, a screw 502 penetrating through the long slits 402 is fixedly arranged on the upper probe base 5, a locking nut 6 is connected to the screw 502, and the upper probe base 5 is fastened on the vertical plate 402 by using the locking force of the locking nut 6. In practical application, the height of the upper probe seat 5 can be adjusted by loosening the locking nut 6, the upper probe seat 5 is adjusted to a proper height, and then the locking nut 6 is fastened to fasten the probe seat, so that the tool can test batteries with various lengths.

In addition, the vertical plate 402 is provided with a scale mark 8 corresponding to the long slit 402a to assist the tester to adjust the height position of the upper probe seat 5 in advance according to the length of the battery to be tested.

The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.

Claims (9)

1. The utility model provides a battery voltage, internal resistance test fixture, includes base (4), separate two probe seat (5) of arranging about being provided with on base (4), its characterized in that, every all install on probe seat (5):

at least three first probes (1) arranged at intervals along a first circumference,

at least three second probes (2) arranged at intervals along a second circumference, and

at least three third probes (3) arranged at intervals along a third circumference;

the first circumference, the second circumference and the third circumference are coaxially arranged, the diameters of the first circumference, the second circumference and the third circumference are sequentially increased, the first probe (1), the second probe (2) and the third probe (3) are all telescopic spring probes, the head part of the first probe (1) is higher than the head part of the second probe (2), and the head part of the second probe (2) is higher than the head part of the third probe (3).

2. The battery voltage and internal resistance testing tool according to claim 1, wherein the number of the first probe (1), the second probe (2) and the third probe (3) is increased in sequence.

3. The tool for testing the battery voltage and the internal resistance as claimed in claim 2, wherein 4 first probes (1), 10 second probes (2) and 15 third probes (3) are mounted on each probe seat (5).

4. The battery voltage and internal resistance testing tool according to claim 1, wherein the first probe (1), the second probe (2) and the third probe (3) comprise:

a needle sleeve (123a),

a needle bar (123b) with a tail end inserted in the needle sleeve and a front end positioned outside the needle sleeve, an

The spring is accommodated in the needle sleeve and is connected with the needle sleeve and the needle rod;

the needle sleeve (123a) is fixedly connected with the probe seat (5).

5. The tool for testing the battery voltage and the internal resistance according to claim 4, wherein a plurality of probe mounting holes (501) are formed in the probe base (5), and the needle sleeve (123a) is fixedly mounted in the probe mounting holes (501).

6. The tool for testing the battery voltage and the internal resistance according to claim 1, wherein the base (4) comprises a bottom plate (401) and a vertical plate (402), the bottom plate (401) is horizontally arranged, the vertical plate (402) is vertically fixed on the upper portion of the bottom plate, and the two probe seats (5) are both mounted on the vertical plate (402).

7. The battery voltage and internal resistance testing tool according to claim 6, wherein the lower probe seat (5) is fastened to the vertical plate (402), the vertical plate (402) is provided with a vertically extending long slit (402a), the upper probe seat (5) is fixedly provided with a screw (502) penetrating through the long slit (402a), and the screw (502) is connected with a locking nut (6).

8. The tool for testing the voltage and the internal resistance of the battery according to claim 7, wherein scale marks (8) corresponding to the long slits (402a) are arranged on the vertical plate (402).

9. The battery voltage and internal resistance testing tool according to claim 1, wherein the first probe (1), the second probe (2) and the third probe (3) are all connected with a detection lead (7), and the detection lead (7) is connected with a voltage and internal resistance testing instrument.

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