CN215180737U

CN215180737U - OCV test equipment of battery

Info

Publication number: CN215180737U
Application number: CN202120541710.0U
Authority: CN
Inventors: 黎月光; 冯洪宇
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-12-14
Anticipated expiration: 2031-03-16

Abstract

The utility model relates to a new energy battery production technical field specifically discloses an OCV test equipment of battery. The utility model provides a clamping jaw subassembly and test assembly separately set up in the OCV test equipment of battery, have solved the problem that leads to measuring accuracy to reduce because of the centre gripping contact failure among the prior art, the utility model provides a test equipment has improved the stability of test assembly and the electrically conductive handle contact of battery package, and then has improved the measuring accuracy; because the relative positions of the clamping jaw assembly and the testing assembly are fixed, the testing positions of the testing probes at each time are consistent, so that the testing of the internal resistance of the battery is consistent; in addition, the test probe contacts with the end part of the conductive handle, so that the problem that the test probe is deformed due to radial bending moment is effectively avoided, the service life of the test probe is prolonged, the contact stability of the test probe and the conductive handle is good, the damage of the test probe to the conductive handle is reduced, and the welding area of the conductive handle is prevented from being scratched and punctured.

Description

OCV test equipment of battery

Technical Field

The utility model relates to a new energy battery production technical field especially relates to an OCV test equipment of battery.

Background

And performing an Open Circuit Voltage (OCV) test to obtain parameters such as the K value, the current, the Voltage, the capacitance and the like of the battery, so as to sort out batteries with unqualified parameters, and ensure the quality of finished batteries.

After the lithium battery pack is assembled, OCV detection is needed, the processes of testing the capacity, current, resistance, impedance, speed, electric leakage, voltage and the like of the battery pack need to be carried out by clamping the conductive handle of the battery pack through the testing clamp, and the testing clamp is contacted with the conductive handle of the battery to form a testing loop. The test clamp in the prior art is an open type test clamp, which mainly comprises a left clamping piece, a right clamping piece, a force application spring, a pin shaft and the like, and a test probe is arranged on the clamping pieces. In the long-term use process, factors such as spring force change, foreign matter sticking on a contact surface of the probe and the like influence the service life and the contact stability of the test clamp, poor contact can be caused, and further the test is inaccurate; meanwhile, during each measurement, the part of the test probe contacting the conductive handle of the battery is inconsistent, so that the measurement difference of the internal resistance of the battery exists, the test consistency of the internal resistance of the battery is influenced, and the test precision is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an OCV test equipment of battery has improved test probe's life-span and the stability of measuring the contact, and then has improved the measuring accuracy.

To achieve the purpose, the utility model adopts the following technical proposal:

an OCV test apparatus of a battery, comprising:

the clamping jaw assemblies are arranged in two groups, the two groups of clamping jaw assemblies are arranged oppositely, the two groups of clamping jaw assemblies are used for clamping conductive handles at two ends of a battery pack, and a detection piece for detecting the conductive handles is arranged on each clamping jaw assembly;

the test assembly is provided with two sets of opposite settings, and every group the test assembly all includes test probe and drive the test probe orientation the probe driving piece that electrically conductive handle tip removed, the test probe can with the tip contact of electrically conductive handle.

Preferably, the clamping jaw assembly comprises at least one clamping jaw, and the clamping jaw is connected with a first clamping jaw driving part for driving the clamping jaw to be closed and a second clamping jaw driving part for driving the clamping jaw to move.

Preferably, the clamping jaw includes first clamping piece and second clamping piece, first clamping piece with the middle part of second clamping piece is articulated, first clamping piece with be equipped with between the second clamping piece and enable the clamping jaw is in the first elastic component of open mode, first clamping piece and/or the one end centre gripping of second clamping piece the surface of electrically conductive handle is equipped with the detection piece, first clamping jaw driving piece with first clamping piece with the other end of second clamping piece is connected in order to drive the clamping jaw is closed.

Preferably, the first elastic part comprises a torsion spring, the middle parts of the first clamping piece and the second clamping piece are hinged through a pin shaft, and the torsion spring is sleeved on the pin shaft.

Preferably, the first elastic part comprises a spring, one end of the spring is connected with the first clamping piece, the other end of the spring is connected with the second clamping piece, and the spring is close to the detection part.

Preferably, first clamping jaw driving piece includes clamping jaw driving cylinder and thimble, the one end of thimble with the piston rod end connection of clamping jaw driving cylinder, the other end of thimble is the wedge, first clamping piece with the tip of second clamping piece all is equipped with the gyro wheel, the tip of thimble is arranged in two between the gyro wheel.

Preferably, the test probe comprises:

the probe body, one end of the said probe body is connected with said probe driving part;

the probe current part is arranged on the end face of the other end of the probe body;

the probe voltage part protrudes out of the end face of the other end of the probe body, and the probe voltage part can stretch relative to the probe body.

Preferably, a second elastic piece capable of being compressed along the movement direction of the probe body is arranged between the output end of the probe driving piece and the probe body.

Preferably, an installation groove is formed in the end face of the probe body, one end of the probe voltage part is arranged in the installation groove, and the probe voltage part is connected with the groove bottom of the installation groove through a third elastic piece.

Preferably, the surfaces of the probe current part and the probe voltage part, which are in contact with the conductive handle, are provided with knurled lines.

The utility model has the advantages that:

the clamping jaw assembly and the testing assembly are separately arranged, so that the problem of reduction of measurement precision caused by poor clamping contact in the prior art is solved, the testing equipment provided by the utility model improves the contact stability of the testing assembly and the conductive handle of the battery pack, and further improves the testing precision; because the relative positions of the clamping jaw assembly and the testing assembly are fixed, the testing positions of the testing probes at each time are consistent, so that the testing of the internal resistance of the battery is consistent; in addition, the test probe contacts with the end part of the conductive handle, so that the problem that the test probe is deformed due to radial bending moment is effectively avoided, the service life of the test probe is prolonged, the contact stability of the test probe and the conductive handle is good, the damage of the test probe to the conductive handle is reduced, and the welding area of the conductive handle is prevented from being scratched and punctured.

Drawings

Fig. 1 is a schematic structural diagram of an OCV test apparatus for a battery according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a clamping jaw assembly and a testing assembly provided by an embodiment of the present invention;

fig. 3 is a partial schematic structural view of a jaw assembly provided in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a test assembly provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of the probe voltage part and the probe body provided by the embodiment of the present invention.

In the figure:

1. a jaw assembly; 11. a clamping jaw; 111. a first clip piece; 112. a second clip; 113. a pin shaft; 114. a roller; 12. a first jaw drive; 121. the clamping jaw drives the cylinder; 122. a thimble;

2. testing the component; 21. testing the probe; 211. a probe body; 212. a probe current section; 213. a probe voltage part; 214. mounting grooves; 22. a probe driving member; 23. a second elastic member; 24. a third elastic member;

3. a detection member;

4. a voltage tester;

5. an internal resistance tester;

6. an operation panel;

7. an alarm;

100. a battery pack; 101. a conductive handle.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 3, the present embodiment provides an OCV test apparatus for a battery, the test apparatus includes two sets of clamping jaw assemblies 1 and a test assembly 2, the two sets of clamping jaw assemblies 1 are disposed oppositely, the two sets of clamping jaw assemblies 1 are used for clamping conductive handles 101 at two ends of a battery pack 100, and a detection piece 3 for detecting the conductive handles 101 is disposed on the clamping jaw assembly 1; the test assembly 2 is provided with two sets of relative settings, and every group test assembly 2 all includes test probe 21 and the probe driving piece 22 of drive test probe 21 towards electrically conductive handle 101 tip removal, and test probe 21 can contact with the tip of electrically conductive handle 101.

The clamping jaw assembly 1 and the testing assembly 2 are separately arranged, so that the problem of reduction of measurement accuracy caused by poor clamping contact in the prior art is solved, the testing equipment provided by the utility model improves the contact stability of the testing assembly 2 and the conductive handle 101 of the battery pack 100, and further improves the testing accuracy; because the relative positions of the clamping jaw assembly 1 and the testing assembly 2 are fixed, the testing positions of the testing probes 21 are consistent each time, so that the testing of the internal resistance of the battery is consistent; in addition, the test probe 21 is in contact with the end of the conductive handle 101, so that the problem that the test probe 21 is deformed due to radial bending moment of the test probe 21 is effectively avoided, the service life of the test probe 21 is prolonged, the contact stability of the test probe 21 and the conductive handle 101 is good, the damage of the test probe 21 to the conductive handle 101 is reduced, and the welding area of the conductive handle 101 is prevented from being scratched and punctured.

Specifically, in the present embodiment, as shown in fig. 2, the jaw assembly 1 includes at least one jaw 11, and the jaw 11 is connected to a first jaw driver 12 for driving the jaw 11 to close and a second jaw driver (not shown) for driving the jaw 11 to move. The second jaw driving member drives the jaw 11 to move towards the conductive handle 101 of the battery pack 100, and after the detecting member 3 detects the edge of the conductive handle 101, the second jaw driving member drives the jaw 11 to move for a fixed displacement to ensure that the testing position of the testing probe 21 is consistent each time, and then the first jaw driving member 12 drives the jaw 11 to close to clamp the conductive handle 101 to fix the position of the battery pack 100. Preferably, each jaw assembly 1 comprises two jaws 11, the test assembly 2 is placed between the two jaws 11, and the conductive handle 101 is balanced in force, so that the test assembly 2 can be tested conveniently.

Further, the second clamping jaw driving piece can be an air cylinder, the first clamping jaw driving piece 12 and the clamping jaw 11 are both installed on the installation plate, the installation plate is movably installed on the rack, and the air cylinder drives the installation plate to move so as to drive the clamping jaw 11 to move.

In this embodiment, as shown in fig. 3, the clamping jaw 11 includes a first clamping jaw 111 and a second clamping jaw 112, the middle portions of the first clamping jaw 111 and the second clamping jaw 112 are hinged, a first elastic member (not shown in the figure) capable of opening the clamping jaw 11 is disposed between the first clamping jaw 111 and the second clamping jaw 112, a detection member 3 is disposed on a surface of one end of the first clamping jaw 111 and/or the second clamping jaw 112 clamping the conductive handle 101, and a first clamping jaw driving member 12 is connected to the other end of the first clamping jaw 111 and the second clamping jaw 112 to drive the clamping jaw 11 to close. This simple structure, first clamping jaw driving piece 12 drive clamping jaw 11 is closed, has realized automatic operation, has replaced manual operation in order to press from both sides tight electrically conductive handle 101, makes clamping jaw 11 press from both sides the position of pressing from both sides tight electrically conductive handle 101 and has had the uniformity, has improved production efficiency.

Further, the first elastic element includes a torsion spring, the middle portions of the first clamping piece 111 and the second clamping piece 112 are hinged through a pin 113, and the torsion spring is sleeved on the pin 113, so that the clamping jaw 11 is in an open state under the condition that the clamping jaw 11 is not affected by external force.

In another embodiment, the first elastic member comprises a spring, one end of the spring is connected to the first clamping piece 111, the other end of the spring is connected to the second clamping piece 112, and the spring is disposed near the detecting member 3. Under the action of no external force, the clamping jaw 11 is in an opening state by the first elastic piece, and the clamping jaw opening device is simple in structure and easy to implement.

The surfaces of the first clamping piece 111 and the second clamping piece 112 clamping the conductive handle 101 are provided with flexible material layers, such as a silica gel layer, a rubber layer and the like, so that the conductive handle 101 is prevented from being damaged when the clamping jaw 11 clamps the conductive handle 101, and the good appearance of the conductive handle 101 is ensured.

The first jaw driving member 12 drives the jaws 11 to close so as to clamp the conductive handle 101, in this embodiment, the first jaw driving member 12 includes a jaw driving cylinder 121 and an ejector pin 122, one end of the ejector pin 122 is connected to the end of the piston rod of the jaw driving cylinder 121, the other end of the ejector pin 122 is wedge-shaped, the ends of the first jaw 111 and the second jaw 112 are both provided with rollers 114, and the end of the ejector pin 122 is disposed between the two rollers 114. When the jaw driving cylinder 121 is extended, the ejector pin 122 moves and gradually increases the distance between the first jaw 111 and the second jaw 112, and the ends of the first jaw 111 and the second jaw 112 clamping the conductive stem 101 are closed to clamp the conductive stem 101. When the jaw driving cylinder 121 retracts, the ejector pin 122 gradually retreats between the first jaw 111 and the second jaw 112, and the ends of the first jaw 111 and the second jaw 112 clamping the conductive shank 101 are separated from each other to release the conductive shank 101. The rollers 114 are disposed at the ends of the first clamping piece 111 and the second clamping piece 112, so that the thimble 122 can move smoothly between the first clamping piece 111 and the second clamping piece 112, the friction force is reduced, and the movement stability of the thimble 122 is improved.

The test equipment provided by the embodiment further comprises a voltage tester 4 and an internal resistance tester 5 (see fig. 1), wherein the voltage tester 4 and the internal resistance tester 5 are respectively electrically connected with the two groups of test components 2, the test components 2 are in contact with the conductive handle 101 to form a test loop and test, the voltage tester 4 and the internal resistance tester 5 process and display a test result, and the voltage tester 4 can adopt a universal meter and is easy to operate. The test device also comprises an operation panel 6 and an alarm 7 (see fig. 1), wherein an operator can operate the test device through the operation panel 6, and the alarm information is fed back to the operator through the alarm 7.

In this embodiment, as shown in fig. 4, the test probe 21 includes a probe body 211, a probe current portion 212 and a probe voltage portion 213, one end of the probe body 211 is connected to the probe driving member 22, the probe current portion 212 is disposed on the other end surface of the probe body 211, the probe voltage portion 213 protrudes from the other end surface of the probe body 211, and the probe voltage portion 213 can extend and contract relative to the probe body 211. Under the driving of the probe driving member 22, the probe voltage part 213 is firstly contacted with the conductive handle 101, and as the probe driving member 22 continues to be driven, the probe voltage part 213 is compressed until the probe current part 212 is contacted with the conductive handle 101, and the probe voltage part 213 and the probe current part 212 can be stably contacted with the conductive handle 101. Preferably, the probe driver 22 is a pneumatic cylinder.

In order to further improve the stable contact between the probe voltage part 213 and the conductive handle 101, as shown in fig. 5, an end surface of the probe body 211 is provided with a mounting groove 214, one end of the probe voltage part 213 is disposed in the mounting groove 214, and the probe voltage part 213 is connected to the bottom of the mounting groove 214 through the third elastic member 24. The probe voltage part 213 keeps stable contact with the conductive handle 101 under the action of the third elastic member 24, so as to reduce contact resistance, and under the buffer action of the third elastic member 24, the probe voltage part 213 is in flexible contact with the conductive handle 101, so as not to damage the conductive handle 101. The third elastic element 24 is preferably a spring, and has the advantages of simple structure, low cost and good use effect.

In order to further improve the stable contact of the probe current portion 212 with the conductive shank 101, with continued reference to fig. 4, a second elastic member 23 that can be compressed in the moving direction of the probe body 211 is provided between the output end of the probe driving member 22 and the probe body 211. The probe current part 212 is kept in stable contact with the conductive handle 101 under the action of the second elastic member 23, so that contact resistance is reduced, and under the buffering action of the second elastic member 23, the probe current part 212 is in flexible contact with the conductive handle 101, so that the conductive handle 101 is not damaged. The second elastic element 23 is preferably a spring, and has the advantages of simple structure, low cost and good use effect.

In this embodiment, the surfaces of the probe current portion 212 and the probe voltage portion 213 contacting the conductive handle 101 are both provided with knurled lines, and when the probe current portion 212 and the probe voltage portion 213 contact the conductive handle 101, the knurled lines pierce the oxide layer on the surface of the conductive handle 101, so as to reduce the contact impedance and improve the detection accuracy.

When a plurality of battery packs 100 are loaded by stacking material frames, in order to improve the testing efficiency, the testing component 2 can be used for testing the battery packs 100 in the material frames one by one, specifically, the clamping jaw component 1 and the testing component 2 can be installed on the lifting unit, and the lifting unit drives the clamping jaw component 1 and the testing component 2 to ascend or descend so as to realize the sequential testing of the plurality of battery packs 100. The lifting unit can be a synchronous belt mechanism or a chain wheel and chain mechanism, and the like, and is not described in detail herein due to the prior art.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An OCV test apparatus of a battery, comprising:

the clamping jaw assemblies (1) are provided with two groups, the two groups of clamping jaw assemblies (1) are arranged oppositely, the two groups of clamping jaw assemblies (1) are used for clamping conductive handles (101) at two ends of a battery pack (100), and a detection piece (3) for detecting the conductive handles (101) is arranged on each clamping jaw assembly (1);

the test assembly (2) is provided with two sets of relative settings, every group test assembly (2) all include test probe (21) and drive test probe (21) orientation probe driving piece (22) that electrically conductive handle (101) tip removed, test probe (21) can with the tip contact of electrically conductive handle (101).

2. The OCV test apparatus of a battery according to claim 1, wherein the jaw assembly (1) includes at least one jaw (11), and a first jaw driver (12) for driving the jaw (11) to be closed and a second jaw driver for driving the jaw (11) to be moved are connected to the jaw (11).

3. The OCV test apparatus of battery according to claim 2, wherein the clamping jaw (11) includes a first clamping jaw (111) and a second clamping jaw (112), the middle portion of the first clamping jaw (111) and the second clamping jaw (112) is hinged, a first elastic member is provided between the first clamping jaw (111) and the second clamping jaw (112) to enable the clamping jaw (11) to be in an open state, one end of the first clamping jaw (111) and/or the second clamping jaw (112) is clamped, the surface of the conductive handle (101) is provided with the detection member (3), the first clamping jaw driving member (12) is connected with the other end of the first clamping jaw (111) and the second clamping jaw (112) to drive the clamping jaw (11) to be closed.

4. The OCV testing apparatus of a battery according to claim 3, wherein the first elastic member comprises a torsion spring, the middle portions of the first clamping piece (111) and the second clamping piece (112) are hinged by a pin (113), and the torsion spring is sleeved on the pin (113).

5. The OCV test apparatus of a battery according to claim 3, wherein the first elastic member includes a spring, one end of the spring is connected with the first jaw (111), the other end is connected with the second jaw (112), and the spring is disposed near the detection member (3).

6. The OCV testing apparatus of the battery according to claim 3, wherein the first clamping jaw driving member (12) comprises a clamping jaw driving cylinder (121) and an ejector pin (122), one end of the ejector pin (122) is connected with the end portion of a piston rod of the clamping jaw driving cylinder (121), the other end of the ejector pin (122) is wedge-shaped, rollers (114) are arranged at the end portions of the first clamping piece (111) and the second clamping piece (112), and the end portion of the ejector pin (122) is arranged between the two rollers (114).

7. The OCV test apparatus of a battery according to claim 1, wherein the test probe (21) includes:

the probe body (211), one end of the probe body (211) is connected with the probe driving piece (22);

a probe current section (212) provided on the other end surface of the probe body (211);

and the probe voltage part (213) protrudes out of the end face of the other end of the probe body (211), and the probe voltage part (213) can stretch and retract relative to the probe body (211).

8. The OCV test apparatus of a battery according to claim 7, wherein a second elastic member (23) that is compressible in a movement direction of the probe body (211) is provided between the output end of the probe driving member (22) and the probe body (211).

9. The OCV test apparatus of a battery according to claim 7, wherein an installation groove (214) is formed at an end surface of the probe body (211), one end of the probe voltage part (213) is disposed in the installation groove (214), and the probe voltage part (213) is connected to a groove bottom of the installation groove (214) by a third elastic member (24).

10. The OCV test apparatus of a battery according to claim 7, wherein the surfaces of the probe current part (212) and the probe voltage part (213) contacting the conductive handle (101) are each provided with a knurled pattern.