CN113049972A

CN113049972A - Power battery detection test device

Info

Publication number: CN113049972A
Application number: CN202110605818.6A
Authority: CN
Inventors: 方新磊; 张美莹; 董娜; 赵敬云; 张治平
Original assignee: Henan Institute of Technology
Current assignee: Henan Institute of Technology
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2021-06-29
Anticipated expiration: 2041-06-01
Also published as: CN113049972B

Abstract

The invention discloses a power battery detection test device which comprises a test bench, a first lead screw driving system, a second lead screw driving system and a guide rail, wherein a first sliding seat driven by the first lead screw driving system and a second sliding seat driven by the second lead screw driving system are arranged on the first sliding seat, a first rotating disc is rotatably arranged on the first sliding seat, a spiral groove is formed in the first rotating disc, a second rotating disc is arranged on the second sliding seat, a needling assembly is arranged on the second rotating disc, the first sliding seat and the second sliding seat can be folded under the driving of respective lead screw driving mechanisms, and a bent part on a needle is inserted into the spiral groove of the first rotating disc. This application adopts thread groove mechanism to realize the experimental needle drive structure irrelevant with acupuncture test resistance, makes control and stroke calculation all simplify greatly, and the design of two sliding seats makes the experimenter can select the arbitrary point on the battery package to test, has increased the function of oblique puncture, cooperates battery anchor clamps, has realized the acupuncture experiment that can arbitrary point, can arbitrary angle.

Description

Power battery detection test device

Technical Field

The application relates to a power battery equipment manufacturing and quality detection test device, in particular to a power battery detection test device.

Background

The power battery is a power source for providing power source for the tool, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts. Because the usage place is a running vehicle or the like, attention has been paid to the risk of explosion of the battery when it is damaged by collision, dropping, and external force. In the national standard and the industry standard, the detection of the power battery is performed by adopting a needling test mode. Briefly, the safety of the power battery pack was evaluated by puncturing the power battery pack with a steel needle and observing the heat generation, temperature change, etc. of the battery pack.

In the prior art, the acupuncture test equipment generally adopts an oil hydraulic cylinder to drive a steel needle for acupuncture, in the scheme, the puncturing force output by the oil hydraulic cylinder is fixed, but the battery pack shell belongs to an automobile structural member, so that the strength is higher, and the hydraulic driven acupuncture cannot ensure the slow and uniform puncturing; on the other hand, the fixed puncturing mode also makes the detection of the whole battery pack difficult to realize.

Disclosure of Invention

Problem (A)

To the above-mentioned prior art current situation, this application is mainly to following technical problem:

1. how the puncture can be made slowly and constantly;

2. how to puncture each part of the battery pack from different angles and reduce manual intervention.

(II) technical scheme

In order to solve the technical problems, the application provides a power battery detection test device which comprises a test bench and a clamping system for a battery pack to be detected, and is characterized by further comprising a first lead screw driving system, a second lead screw driving system and a guide rail which are fixedly arranged on the test bench, a first sliding seat driven by the first lead screw driving system, and a second sliding seat driven by the second lead screw driving system, wherein the first sliding seat and the second sliding seat are guided by the guide rail and can move above the battery pack;

a vertical plate is arranged on the first sliding seat, a first rotating disc is rotatably arranged on the vertical plate, and a spiral groove is formed in the first rotating disc; the first rotating disc can be driven to rotate by the driving mechanism; a second turntable is arranged on the second sliding seat, a needling assembly is arranged on the second turntable, and needles for needling tests are limited by the needling assembly and can only slide up and down; the needle is also provided with a bent part, the first sliding seat and the second sliding seat can be folded under the driving of the respective screw rod driving mechanisms, and the bent part on the needle is inserted into the spiral groove of the first rotary table.

Furthermore, a roller sleeve is sleeved on the bending part, and the roller sleeve is made of an insulating material.

Further, acupuncture assembly includes needle file mechanism, needle file mechanism is including setting up the needle file springboard on the second carousel, install the needle file of hexagonal prism shape on the needle file springboard, be provided with the needle of a plurality of straight flutes in order spacing every straight flute on the needle file lateral wall, the top of straight flute is provided with magnetism and inhales the mechanism and can adsorbs the needle at initial position, the needle file is by the rotatable needle that trades of actuating mechanism drive.

Furthermore, the number of the straight grooves on the needle base is 3, the straight grooves are arranged on the side face of the needle base at intervals, and the specifications of needles arranged in each straight groove are different.

Further, the material of the needle is preferably silicon steel.

Further, the second turntable is driven by the driving device to rotate, and the rotation axis of the second turntable is consistent with the axis direction of the bent part when the needle in the using state in the current needle seat is located at the initial position.

(III) advantageous effects

1. The test needle driving structure irrelevant to the needling test resistance is realized by adopting the thread groove mechanism, so that the control and the stroke calculation are greatly simplified, and the design of the double sliding seats ensures that a tester can select any point on the battery pack for testing;

2. the function of oblique puncture is added, and the acupuncture test at any point and any angle is realized by matching the battery clamp.

Drawings

FIG. 1 is a system schematic of an experimental setup according to the present application;

FIG. 2 is a partial enlarged view of FIG. 1 viewed from another direction;

FIG. 3 is a schematic view of an unfolded lancing mechanism;

FIG. 4 is a schematic view of the initial position of the needle after the lancing mechanism is closed;

FIG. 5 is a schematic view of the turret rotated several weeks with the steel needle in the most distal stroke position;

FIG. 6 is a schematic view of the angle of rotation of the needle hub mechanism;

fig. 7 is a schematic view of the present solution as viewed from the bottom.

Reference numerals

1. A test bed; 2. a clamping system; 3. a battery pack; 4. a guide rail; 5. a first lead screw drive system; 6. a first slider; 7. a second lead screw drive system; 8. a second slide carriage; 9. a needling assembly; 10. a needle seat mechanism; 11. a first turntable; 12. a helical groove; 13. a second turntable; 14. a needle bed springboard; 15. a needle seat; 16. a needle; 17. a straight groove; 18. a bending section; 19. and (6) rolling.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in fig. 1, the power battery detection test device according to the present application includes a test bench 1, a clamping system 2 for a battery pack 3 to be detected, a first lead screw driving system 5, a second lead screw driving system 7 and a guide rail 4 which are fixedly arranged on the test bench 1, a first slide 6 driven by the first lead screw driving system 5, a second slide 8 driven by the second lead screw driving system 7, wherein the first slide 6 and the second slide 8 are guided by the guide rail 4 and can move above the battery pack 3;

a vertical plate is arranged on the first sliding seat 6, a first rotary disc 11 is rotatably arranged on the vertical plate, and a spiral groove 12 is arranged on the first rotary disc 11; the first rotary disc 11 can be driven to rotate by a driving mechanism; a second rotating disc 13 is arranged on the second sliding seat 8, a needling assembly 9 is arranged on the second rotating disc 13, and a needle 16 for needling test is limited by the needling assembly 9 and can only slide up and down; the needle 16 is also provided with a bent part 18, the first slide 6 and the second slide 8 can be folded under the drive of the respective screw drive mechanism, and the bent part 18 of the needle 16 is inserted into the spiral groove 12 of the first rotary table 11.

The working principle of the device is as follows: the first slide seat 6 and the second slide seat 8 can be driven by the lead screw guide rail to move back and forth above the battery pack 3 to be detected so as to determine the working position of the acupuncture experiment, after the position is determined, the two lead screw driving mechanisms still respectively drive the second slide seat 8 and the first slide seat 6 to be close to each other (folded), and the bent part 18 of the needle 16 on the acupuncture assembly 9 on the vertical plate of the second slide seat 8 is inserted into the spiral groove 12 in the first slide seat 6.

The principle of the spiral groove 12 driving the test needle 16 to move downwards is as follows: the transmission mechanism is usually used in the motion of a fixture block mechanism of a lathe three-jaw chuck by adopting an Archimedes spiral groove, and has the characteristics that the moving distance of a jaw is constant when the spiral groove 12 rotates for one circle, namely the translational speed of the jaw is constant under the condition of constant rotating speed, and the accurate translational distance of the jaw can be obtained by simple conversion of the rotating angle of the spiral groove 12. The scheme utilizes the characteristic of the Archimedes spiral groove, when the first rotating disc 11 rotates, the needle 16 can only move up and down due to the limit of the needling assembly 9, and the pricking distance is only related to the rotating angle of the first rotating disc 11. This feature makes the stroke control of the downward movement of the needle 16 simple as a dial angle control, and makes the first dial 11 rotate uniformly, so that a uniform downward movement can be obtained.

Fig. 4-5 show the dial driving test needle 16 from the initial position to the maximum travel position, respectively. And also makes it very easy to obtain the positive pressure required to penetrate the battery pack 3 because the reduction gear ratio of this mechanism is large. The requirement can be met by adopting a smaller speed reduction driving mechanism.

After the completion of the acupuncture test, the first rotary disk 11 may also be rotated in the reverse direction to return the test needles 16 to the initial positions.

Furthermore, a roller 19 is sleeved on the bending part 18, and the roller 19 is made of an insulating material.

The separation of the needle 16 from the drive means of the needle 16 has the further advantage that during a needle-stick experiment, there may be electrical discharges and the passage of current through the needle 16 may create an unexpected risk, making the spiral groove 12 easier to drive and the device less risky to shock, by means of the roller 19 being made of an insulating material such as plastic (with self-lubricating properties).

Further, the needling assembly 9 includes a needle seat mechanism 10, the needle seat mechanism 10 includes a needle seat springboard 14 arranged on the second rotating disk 13, a needle seat 15 in a hexagonal prism shape is mounted on the needle seat springboard 14, a plurality of straight grooves 17 are arranged on the side wall of the needle seat 15 to limit the needle 16 in each straight groove 17, and a magnetic suction mechanism is arranged at the top of each straight groove 17 to suck the needle 16 at an initial position; the needle hub 15 is driven by a drive mechanism to rotate the needle 16.

Referring to fig. 3-5, it can be seen that the needle stick test is consumable for the test needles 16, and therefore to minimize the risk of human handling, a rotatable needle mount 15 is provided and multiple needles 16 are accessed. When the needle 16 needs to be changed, the two sliding seats are driven to be separated through the two lead screw mechanisms, then the needle seat 15 rotates, the other needle 16 is changed, and then the needle 16 is folded to complete the needle change.

Further, 3 straight grooves 17 are arranged on the needle seat 15 at intervals, and the needle 16 arranged in each straight groove 17 has different specifications.

The needle stick test in the national standards does not strictly regulate the standards of the test needles 16, but for the sake of comprehensive testing, needles 16 of different specifications may be used.

Further, the material of the needle 16 is preferably silicon steel.

Further, the second rotating disk 13 is driven by the driving device to rotate, and the rotating axis of the second rotating disk 13 is consistent with the axial direction of the bent part 18 when the needle 16 in the using state in the front needle seat 15 is located at the initial position.

The second rotating disc 13 rotates to enlarge the test range of the acupuncture test, so that the test can be carried out under the condition of non-vertical acupuncture; on the other hand, to ensure that the bent part 18 of the currently used needle 16 can always enter the groove of the thread groove 12 even after the second rotary disk 13 is rotated, the two slides can be closed by making the rotation axis of the second rotary disk 13 along the axial direction of the bent part 18 when the second rotary disk is in the initial position.

Because the needle 16 is driven by the thread groove 12, after the second rotary table 13 rotates, the needle seat 15 is not vertical any more, the spiral groove 12 can still drive the currently used needle 16 to puncture obliquely downwards, the transmission is greatly simplified compared with that of other mechanisms, the conversion of the transmission distance is very simple, and the driving mechanism does not need to be adjusted.

Since the initial position of the needle 16 is provided with the magnetic attracting means, the position thereof is secured, and after the puncture test is completed, the first rotary disk 11 is rotated in the reverse direction to return the needle 16 to the initial position and separate it.

The advantage of separating the first carriage 6 from the second carriage 8 is also that if the needle 16 breaks during the test, it can be replaced very simply (no tools are required in this solution), eliminating the need for a clamping mechanism for the needle 16.

Further, the part of the test bed 1, which bears the battery pack 3 to be tested, is of a hollow structure.

The puncture needle 16 is prevented from damaging the test stand 1.

Further, the portion of the test stand 1 in contact with the battery pack 3 to be tested is made of a material having a thermal conductivity close to that of air.

This is to better simulate the heating conditions in which the cell is damaged during use.

Further, the clamping system 2 includes an indexing mechanism (not shown) for adjusting the angle of the battery pack 3 to be tested. The design is matched with the two sliding seats which slide left and right, and actually, the acupuncture test of any point on the battery can be completed.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. A power battery detection test device comprises a test bench, a clamping system for a battery pack to be detected, and is characterized by further comprising a first lead screw driving system, a second lead screw driving system and a guide rail which are fixedly arranged on the test bench, a first sliding seat driven by the first lead screw driving system, a second sliding seat driven by the second lead screw driving system, wherein the first sliding seat and the second sliding seat are guided by the guide rail and can move above the battery pack;

2. The power battery detection test device according to claim 1, characterized in that: the bending part is sleeved with a roller sleeve, and the roller sleeve is made of an insulating material.

3. The power battery detection test device according to claim 1, characterized in that: the acupuncture assembly includes needle file mechanism, needle file mechanism is including setting up the needle file springboard on the second carousel, install the needle file of hexagonal prism shape on the needle file springboard, be provided with the needle of a plurality of straight flutes in with spacing every straight flute on the needle file lateral wall, the top of straight flute is provided with magnetism and inhales the mechanism and can adsorbs the needle at initial position, the needle file is by the rotatable needle that trades of actuating mechanism drive.

4. The power battery detection test device according to claim 3, characterized in that: the straight groove on the needle file totally 3 sets up on the needle file side at the interval, and the specification of the needle that sets up in every straight groove is different.

5. The power battery detection test device according to claim 1, characterized in that: the needle is preferably made of silicon steel.

6. The power battery detection test device according to claim 1, characterized in that: the second turntable is driven by the driving device to rotate, and the rotating axis of the second turntable is consistent with the axis direction of the bent part when the needle in the using state in the current needle seat is located at the initial position.