CN114459921A

CN114459921A - Automatic battery sample feeding device for battery impact test

Info

Publication number: CN114459921A
Application number: CN202210070878.7A
Authority: CN
Inventors: 蔡杰; 储德韧; 郭文翔; 张小沁; 许铤; 高平
Original assignee: Shanghai Chemical Industry Testing Co ltd; Shanghai Research Institute of Chemical Industry SRICI
Current assignee: Shanghai Chemical Industry Testing Co ltd; Shanghai Research Institute of Chemical Industry SRICI
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-05-10
Anticipated expiration: 2042-01-21
Also published as: CN114459921B

Abstract

The invention relates to a battery automatic sample introduction device for a battery impact test, which comprises a sample introduction box, a sampling assembly, an observation module, a steel bar lifting module and a control module, wherein the sample introduction box is connected with the sampling assembly; the sample injection box comprises a sample injection box shell, a rotating assembly and an adjustable bracket, wherein the rotating assembly is arranged at the bottom of the sample injection box shell; the sampling assembly comprises a rotary base and a liftable sampling arm arranged on the rotary base, and an electromagnet is arranged on the liftable sampling arm; the observation module comprises a base, an explosion-proof box detachably arranged on the base and a displacement driving unit connected with the base; the rod iron lifts the module and includes lift the subassembly and lift the rod iron that the subassembly is connected, it can adjust the height of rod iron to lift the module through the rod iron and with the rod iron rigidity. Compared with the prior art, the invention has small occupied area, and each module can be flexibly adjusted; the automatic impact test that carries on uses fast conveniently, and is simple high-efficient, is applicable to cylinder type lithium cell impact test.

Description

Automatic battery sample feeding device for battery impact test

Technical Field

The invention relates to a battery safety test device, in particular to a battery automatic sample feeding device for a battery impact test.

Background

The impact test is an important test for verifying the safety of the lithium ion battery, and is used for simulating mechanical damage which can cause internal short circuit of the battery under abuse conditions such as impact or extrusion, according to the requirement of an impact test of chapter 3 (hereinafter abbreviated as UN38.3) T.6 of a 'recommendation test and standard manual about dangerous goods transportation' of the United nations, a cylindrical lithium ion battery core with the diameter of more than or equal to 18mm is placed on a flat and smooth surface, falls from a height of 61 cm to a position where a steel bar (the diameter of the steel bar is 15.8 mm, and the length of the steel bar is at least 6 cm) and a sample cross through a 9.1 kg weight, and the highest temperature of the battery after temperature rise is recorded.

Up to now, UN38.3 has undergone many revisions, with a frequency of once every two years, involving experimental methods, pre-processing means, etc. UN38.3 sixth edition revision I of 2017, modifies the number of T.6 impact test battery samples from 5 to 10 cells, and the test method is not changed. For the increase of the number of tests, a high-efficiency experimental device which can complete the automatic sample introduction function conveniently and quickly is urgently needed, and the mainstream impact test equipment in the market at present does not have the automatic test function.

The main reason why the time consumption in the UN38.3 T.6 impact test is long is that the battery is subjected to an impact, and then the battery is internally short-circuited to start discharging, so that the Temperature is slowly increased and decreased due to the safety design of the battery core with a thermistor (Positive Temperature Coefficient). In fact, the battery is in an observation state after being impacted, the equipment at the moment can completely test the next sample, but the battery is quite dangerous to directly replace in the temperature rising process of the battery, and the experimental result is easily influenced by artificial extrusion of the battery due to clamping of tools such as crucible tongs and the like. It is not usually possible for the experimenter to touch and replace the battery before it is judged that the battery has dropped to a safe temperature.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides the automatic battery sample feeding device for the battery impact test, and mainly solves the technical problems of low efficiency, safety and the like of the conventional battery impact device.

The purpose of the invention can be realized by the following technical scheme:

the invention aims to protect automatic battery sample feeding equipment for battery impact testing, which comprises a sample feeding box, a sampling assembly, an observation module, a steel bar lifting module and a control module, wherein the sample feeding box specifically comprises:

the sample feeding box comprises a sample feeding box shell, a rotating assembly and an adjustable support, wherein the rotating assembly is arranged at the bottom of the sample feeding box shell, a battery to be tested is arranged in the sample feeding box shell, the rotating assembly is arranged at an outlet of the sample feeding box shell, the adjustable support can adjust the inclination degree of the sample feeding box shell, and the rotating assembly can control the discharging of the battery to be tested through rotation;

the sampling assembly comprises a rotating base and a liftable sampling arm arranged on the rotating base, and the liftable sampling arm is provided with an electromagnet so as to realize the grabbing and releasing operations of the battery to be tested;

the observation module comprises a sliding table, an explosion-proof box detachably arranged on the sliding table and a screw rod connected with the sliding table, and the detachable mode is that the existing buckle structure or positioning pin structure is adopted;

the steel bar lifting module comprises a lifting assembly and a steel bar connected with the lifting assembly, the lifting assembly can adjust the height of the steel bar and can press the steel bar through the steel bar lifting module;

the control module is respectively in communication connection with the sampling box, the sampling assembly, the observation module and the steel bar lifting module.

Further, the rotating assembly comprises a driving motor, a rotating shaft in transmission connection with an output shaft of the driving motor, and a feeding plate uniformly connected to the rotating shaft.

Further, the rotating assembly is arranged at one end, close to the outlet, of the sample feeding box shell, and the gap between the feeding plates is matched with the volume of the battery to be tested.

Furthermore, a movable cover is arranged at an outlet of the shell of the sample inlet box, and the battery to be tested, which is given out by the rotation of the rotating assembly, rolls out from the position of the movable cover.

Furthermore, the adjustable support comprises a support base and a supporting plate, wherein the support base is provided with a plurality of limiting grooves, one side of the supporting plate is hinged to the lower surface of the sample feeding box, and the other side of the supporting plate is abutted to the limiting grooves.

Furthermore, a servo motor is arranged in the rotating base, and an output shaft of the servo motor is in transmission connection with the lower end of the lifting sampling arm.

Furthermore, the lifting sampling arm comprises a servo electric cylinder, and the servo electric cylinder is in transmission connection with the output end of the servo motor and is driven by the servo motor to rotate;

the output end of the servo electric cylinder is connected with an L-shaped rod, and the electromagnet is fixed on the L-shaped rod.

Further, still include the temperature acquisition module, the module is lifted the module and is observed the module top through the support locating rod iron to the temperature acquisition module.

Further, lift the subassembly and lift the unit including the first rod iron that the symmetry set up and lift the unit with the second rod iron, the both ends of rod iron respectively with first rod iron lifts the unit and the second rod iron lifts the unit connection, first rod iron lifts the unit and the second rod iron lifts the unit and can lift the both ends of rod iron simultaneously.

Further, first rod iron lifts the unit and the second rod iron lifts the unit all includes to lift unit casing, spring, for lifting the electric jar, the one end of spring connect in lift the top of unit casing, be connected with the compact heap on the lower extreme of spring, lift the electric jar and locate lift on the lower surface of unit casing, be connected with down the compact heap on the output of lifting the electric jar, upward all be equipped with the circular arc type recess on compact heap and the lower compact heap.

The invention also provides an automatic detection method for the battery impact test by using the automatic battery sample feeding equipment, which comprises the following steps:

1. and placing the battery to be tested in the sample feeding box, and enabling the battery to be tested to reach the rotating assembly through the inclination angle of the sample feeding box.

2. The control module controls the rotating assembly to rotate the single battery to be tested to pass through.

3. The control module controls the sampling assembly to rotate so that the lifting sampling arm can reach a sampling window of the sampling box.

4. The control module controls the electromagnet at the front end of the sampling assembly to be electrified so as to suck the battery to be tested.

5. The control module controls the steel bar lifting assembly to lift the steel bar.

6. The control module controls the sampling assembly to rotate so that the lifting sampling arm can reach the specified position of the experiment base.

7. The control module controls the electromagnet at the front end of the sampling assembly to be powered off, and the battery to be tested is put down at the designated position of the experiment base.

8. The control module controls the sampling assembly to rotate so that the liftable sampling arm reaches the sampling window of the sampling box to be in standby.

9. The control module controls the electromagnet in the experiment base to be electrified, adjusted and fix the position of the battery, and then the power is cut off.

10. The control module controls the steel bar lifting assembly to place the steel bar on the battery to be tested, and the steel bar is maintained to be horizontal through the spring at the top.

11. After the impact test is finished, the temperature acquisition assembly continuously tracks and acquires the temperature of the tested battery and sends data to an external computer.

12. The control module controls the steel bar lifting assembly to lift the steel bar.

13. The control module controls the sampling assembly to rotate so that the lifting sampling arm can reach the specified position of the experiment base.

14. The control module controls the electromagnet at the front end of the sampling assembly to be electrified and to suck the tested battery.

15. The control module controls the sampling assembly to enable the lifting sampling arm to reach the upper part of the explosion-proof box through rotation.

16. The control module controls the electromagnet at the front end of the sampling assembly to be powered off, and the tested battery is placed into the explosion-proof box.

17. The control module controls a motor in the observation module to enable the explosion-proof box to horizontally move, and meanwhile, the next explosion-proof box reaches the position to be measured.

18. When the temperature acquisition assembly detects that the battery to be tested is located in the explosion-proof box, and the temperature of the battery exceeds the standard requirement after the test, a stop instruction is sent to the control module.

19. When receiving an instruction that an emergency stop button is pressed, the control module stops the work of the automatic battery sample feeding equipment for the battery impact test

Compared with the prior art, the invention has the following technical advantages:

1) high efficiency, the battery autoinjection equipment among this technical scheme advances kind out appearance and realizes automated operation.

2) The real-time nature is strong, and the battery autoinjection equipment in this technical scheme can catch the temperature of every battery in real time through the thermal imaging camera in the temperature acquisition module.

3) The security is strong, and the battery autoinjection equipment test in this technical scheme does not need artificial interference, reduces the risk.

4) The occupied area is small, and each module of the automatic battery sample feeding device in the technical scheme can be flexibly adjusted.

Drawings

Fig. 1 is an overall structure schematic diagram of the automatic battery sample injection device in the technical scheme.

Fig. 2 is a schematic top view of the automatic sample injection device for a battery in the technical scheme.

Fig. 3 is a schematic structural diagram of the sample injection box and the sampling assembly in the technical scheme.

FIG. 4 is a schematic view of a sample introduction box and a sampling assembly from another perspective.

Fig. 5 is a schematic sectional structure view of the sample introduction box.

Fig. 6 is a schematic structural view of an observation module.

FIG. 7 is a schematic structural diagram of the experimental base, the steel bar lifting assembly, the steel bar and the battery.

Figure 8 is a schematic cross-sectional view of a steel bar lifting assembly.

In the figure, 1 is a sample feeding box, 1-1 is a rotating assembly, 1-2 is an adjustable bracket, 1-3 is a movable cover, 2 is a sampling assembly, 2-1 is an electromagnet, 2-2 is a liftable sampling arm, 2-3 is a rotating base, 3 is an observation module, 3-1 is an explosion-proof box, 3-2 is a sliding table, 3-3 is a screw rod, 3-4 is a motor, 3-5 is a sliding rail, 4-1 is a first steel bar lifting unit, 4-2 is a second steel bar lifting unit, 4-11 is a spring, 4-12 is a lifting assembly, 5 is a control module, 6 is a temperature acquisition module, 7 is a steel bar, 8 is an experimental base, 9 is a battery, 10 is a drop hammer, 11-1 is a first guide rail, and 11-2 is a second guide rail.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. In the technical scheme, the features such as component model, material name, connection structure, control method, algorithm and the like which are not explicitly described are all regarded as common technical features disclosed in the prior art.

The automatic battery sample injection device for the battery impact test in the technical scheme has a structure shown in figures 1 to 8, and comprises a sample injection box 1, a sampling assembly 2, an observation module 3, steel bar lifting assemblies 4-1 and 4-2, a control module 5, an experiment base 8 and a temperature acquisition module 6.

The shell of the sample injection box consists of a high-temperature-resistant explosion-proof shell, and the bottom of the sample injection box is provided with a rotating assembly 1-1 which is connected with a control module 5. The bottom of the sample injection box is provided with a sample injection box gradient which can be adjusted by an adjustable bracket 1-2. The battery to be tested moves towards the rotating component 1-1 through the self weight, the sample outlet position of the sample injection box is provided with a movable cover 1-3, and one side of the sample injection box, which faces the sampling component, is provided with a sampling window.

The sampling assembly 2 comprises a rotatable base, a lifting sampling arm is arranged on the rotatable base, and an electromagnet 2-1 is arranged on the lifting sampling arm and can control the lifting sampling arm to grab and release. The rotatable base, the liftable sampling arm and the electromagnet 2-1 are in communication connection with the control module 5.

The observation module comprises an explosion-proof box 3-1 of a high-temperature-resistant explosion-proof shell. The sliding table 3-2 is connected with the explosion-proof box 3-1, and the upper end of the sliding table is provided with a quick-release assembly which can quickly detach the explosion-proof box 3-1. The sliding table 3-2 is connected with the lead screw 3-3, the lead screw 3-3 is in transmission connection with the motor 3-4, an internal threaded hole matched with the external thread of the lead screw 3-3 is formed in the sliding table 3-2, so that the lead screw transmission process is realized, the sliding table can horizontally move on the sliding rail 3-5, and the motor 3-4 is in communication connection with the control module 5.

The steel bar lifting assemblies 4-1 and 4-2 are internally provided with lifting assemblies 4-12, the top of each steel bar lifting assembly is provided with a spring 4-11, the steel bars 7 can be automatically lifted, when the batteries 9 to be tested enter the experiment base 8, the steel bar lifting assemblies 4-1 and 4-2 can maintain the level of the steel bars 7, and the steel bar lifting assemblies 4-1 and 4-2 are connected with the control module 5.

The control module 5 is respectively in communication connection with the sampling box 1, the sampling assembly 2, the observation module and the steel bar lifting module. The control module 5 in the technical scheme is a mainstream singlechip or microprocessor in the market.

The rotating assembly 1-1 comprises a driving motor, a rotating shaft in transmission connection with an output shaft of the driving motor and a feeding plate uniformly connected to the rotating shaft. The rotating assembly 1-1 is arranged at one end, close to the outlet, of the sample feeding box shell, and the gap between the feeding plates is matched with the volume of the battery 9 to be tested.

The outlet of the sample injection box shell is provided with a movable cover 1-3, and the rotating assembly 1-1 rotates to give a battery 9 to be tested to roll out from the position of the movable cover 1-3.

The adjustable support 1-2 comprises a support base and a supporting plate, wherein the support base is provided with a plurality of limiting grooves, one side of the supporting plate is hinged to the lower surface of the sample injection box 1, and the other side of the supporting plate is abutted to the limiting grooves.

A servo motor is arranged in the rotary base 2-3, and an output shaft of the servo motor is in transmission connection with the lower end of the lifting sampling arm 2-2.

The lifting sampling arm 2-2 comprises a servo electric cylinder, and the servo electric cylinder is in transmission connection with the output end of the servo motor and is driven by the servo motor to rotate; the output end of the servo electric cylinder is connected with an L-shaped rod, and the electromagnet 2-1 is fixed on the L-shaped rod.

The temperature acquisition module 6 is arranged above the steel bar lifting module and the observation module through a support. The temperature acquisition module 6 adopts the temperature measurement sensor of the current mainstream. The bracket is provided with a first guide rail 11-1 and a second guide rail 11-2, and two ends of the drop hammer 10 are respectively connected to the first guide rail 11-1 and the second guide rail 11-2 through a connecting rod and an existing sliding assembly.

The lifting assembly 4-12 comprises a first steel bar lifting unit 4-1 and a second steel bar lifting unit 4-2 which are symmetrically arranged, two ends of the steel bar 7 are respectively connected with the first steel bar lifting unit 4-1 and the second steel bar lifting unit 4-2, and the first steel bar lifting unit 4-1 and the second steel bar lifting unit 4-2 can lift two ends of the steel bar 7 at the same time.

The first steel bar lifting unit 4-1 and the second steel bar lifting unit 4-2 comprise lifting unit shells, springs 4-11 and lifting electric cylinders 4-12, one ends of the springs 4-11 are connected to the tops of the lifting unit shells, the lower ends of the springs 4-11 are connected with pressing blocks, the lifting electric cylinders 4-12 are arranged on the lower surfaces of the lifting unit shells, the output ends of the lifting electric cylinders 4-12 are connected with lower pressing blocks, arc-shaped grooves are formed in the upper pressing blocks and the lower pressing blocks, and the two arc-shaped grooves are arranged oppositely, so that clamping of the steel bar 7 can be achieved.

When the battery pack is used specifically, the detection steps for performing a plurality of battery impact tests by using the assembly are as follows:

1. the battery 9 to be tested is placed in the sample introduction box 1, and the battery 9 to be tested reaches the position of the rotating assembly 1-1 through the inclination angle of the sample introduction box 1.

2. The control module 5 controls the rotating assembly 1-1 to rotate a single battery 9 to be tested to pass through.

3. The control module 5 controls the sampling assembly 2 to rotate so that the liftable sampling arm reaches the sampling window of the sampling box 1.

4. The control module 5 controls the electromagnet 2-1 at the front end of the sampling assembly 2 to be electrified to suck the battery 9 to be tested.

5. The control module 5 controls the steel bar lifting assemblies 4-1 and 4-2 to lift the steel bar 7.

6. The control module 5 controls the sampling assembly 2 to rotate so that the liftable sampling arm reaches the specified position of the experiment base 8.

7. The control module 5 controls the electromagnet 2-1 at the front end of the sampling assembly 2 to be powered off, and the battery 9 to be tested is put down at the designated position of the experiment base 8.

8. The control module 5 controls the sampling assembly 2 to rotate so that the liftable sampling arm reaches the sampling window of the sampling box to be standby.

9. The control module 5 controls the electromagnet in the experiment base to be electrified, adjusts and fixes the position of the battery, and then is powered off.

10. The control module 5 controls the steel bar lifting assemblies 4-1 and 4-2 to place the steel bar 7 on the battery 9 to be tested, and the steel bar 7 is kept horizontal through a spring at the top.

11. After the impact test is finished, the temperature acquisition assembly 6 continuously tracks and acquires the temperature of the tested battery 9 and sends data to an external computer.

12. The control module 5 controls the steel bar lifting assemblies 4-1 and 4-2 to lift the steel bar 7.

13. The control module 5 controls the sampling assembly 2 to rotate so that the liftable sampling arm reaches the specified position of the experiment base 8.

14. The control module 5 controls the electromagnet 2-1 at the front end of the sampling assembly 2 to be electrified and to suck the tested battery 9.

15. The control module 5 controls the sampling assembly 2 to rotate so that the lifting sampling arm reaches the upper part of the explosion-proof box 3-1.

16. The control module 5 controls the electromagnet 2-1 at the front end of the sampling assembly 2 to be powered off, and the tested battery 9 is placed in the explosion-proof box 3-1.

17. The control module 5 controls the motor 3-4 in the observation module 3 to enable the explosion-proof box 3-1 to horizontally move, and meanwhile, the next explosion-proof box reaches the position to be measured.

18. When the temperature acquisition component 6 detects that the battery 9 to be tested is positioned in the explosion-proof box 3-1, and the temperature of the battery 9 exceeds the standard requirement after the test, a stop instruction is sent to the control module 5.

19. When receiving the command that the scram button is pressed, the control module 5 stops the work of the automatic battery sample feeding equipment for the battery impact test

20. The control program 5 repeats the operations of steps 2 to 19.

21. When all the tested batteries are in the observation module, the highest temperature of the batteries is captured by the temperature acquisition assembly and stored in an external computer.

22. And when the temperature of the battery is reduced, the experimenter takes out the explosion-proof box through the quick-release assembly, cleans the explosion-proof box, takes out the tested battery, recovers the observation module and finishes the experiment.

Comparative example 1

The impact equipment mainly represented by Chinese patents CN207585877U and CN214174046U is designed without considering that the equipment cannot finish the test with high efficiency when the number of samples is too large, and the operation is complicated. The battery adjustment and fixation and the equipment control are finished manually.

Different from the patent, the battery automatic sampling device applied to the battery impact test has the advantages that the sampling assembly is matched with the sample injector, the steel bar lifting assembly and the observation module, the battery in the observation state is transferred to the observation module to be observed, so that the experiment base is left for carrying out the next test, the impact automation is realized, and the problem of overlong impact experiment test time is solved.

Comparative example 2

Chinese patent CN 107226349A discloses a carrying mechanism with an automatic grabbing robot arm, which is different from the application field of the present invention and is used for carrying heavy objects.

Different from the above patents, the battery automatic sample feeding device applied to the battery impact test has the advantages that the electromagnet is directly designed at the tail end of the component to directly grab an article, and the mechanical structure of the component is directly reduced. The real-time position of the object to be taken is not confirmed by complex sensors such as infrared sensors, but the object to be taken is fixed in position, the placement position is fixed, the sampling assembly can be directly grabbed without adjustment after reaching the position, the structure is simple, the mechanical reliability is high, and the device is suitable for environments with complex working conditions.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims

1. A battery autoinjection equipment for battery striking test which characterized in that includes:

the sample feeding box (1) comprises a sample feeding box shell, a rotating assembly (1-1) and an adjustable support (1-2), wherein the rotating assembly (1-1) and the adjustable support (1-2) are arranged at the bottom of the sample feeding box shell, a battery (9) to be tested is arranged in the sample feeding box shell, the rotating assembly (1-1) is arranged at an outlet of the sample feeding box shell, the adjustable support (1-2) can adjust the inclination degree of the sample feeding box shell, and the rotating assembly (1-1) can realize the discharging control of the battery (9) to be tested through rotation;

the sampling assembly (2) comprises a rotating base (2-3) and a liftable sampling arm (2-2) arranged on the rotating base (2-3), wherein the liftable sampling arm (2-2) is provided with an electromagnet (2-1), so that the grabbing and releasing operations of the battery (9) to be detected are realized;

the observation module comprises a sliding table (3-2), an explosion-proof box (3-1) detachably arranged on the sliding table (3-2), and a displacement driving unit connected with the sliding table (3-2);

the steel bar lifting module (4) comprises lifting components (4-12) and a steel bar (7) connected with the lifting components (4-12), wherein the lifting components (4-12) can adjust the height of the steel bar (7) and can fix the position of the steel bar (7) through the steel bar lifting module (4);

and the control module (5) is in communication connection with the sample feeding box (1), the sampling assembly (2), the observation module and the steel bar lifting module respectively.

2. The automatic sample feeding device for the battery impact test is characterized in that the rotating assembly (1-1) comprises a driving motor, a rotating shaft in transmission connection with an output shaft of the driving motor, and a feeding plate uniformly connected to the rotating shaft.

3. The automatic sample introduction device for the battery impact test according to claim 2, wherein the rotating assembly (1-1) is arranged at one end of the sample introduction box housing close to the outlet, and the gap between the feeding plates is matched with the volume of the battery (9) to be tested.

4. The automatic sample introduction device for the battery impact test is characterized in that a movable cover (1-3) is arranged at an outlet of a shell of the sample introduction box according to claim 3, and the rotating assembly (1-1) rotates a given battery (9) to be tested to roll out from the movable cover (1-3).

5. The automatic battery sample feeding device for battery impact testing according to claim 1, wherein the adjustable support (1-2) comprises a support base and a supporting plate, the support base is provided with a plurality of limiting grooves, one side of the supporting plate is hinged to the lower surface of the sample feeding box (1), and the other side of the supporting plate abuts against the limiting grooves.

6. The automatic battery sample feeding device for the battery impact test according to claim 1, wherein a servo motor is arranged in the rotating base (2-3), and an output shaft of the servo motor is in transmission connection with the lower end of the liftable sampling arm (2-2).

7. The automatic sample introduction device for the battery impact test is characterized in that the liftable sampling arm (2-2) comprises a servo electric cylinder, and the servo electric cylinder is in transmission connection with an output end of a servo motor and is driven by the servo motor to rotate;

the output end of the servo electric cylinder is connected with an L-shaped rod, and the electromagnet (2-1) is fixed on the L-shaped rod.

8. The automatic sample introduction device for the battery impact test according to claim 6, further comprising a temperature collection module (6), wherein the temperature collection module (6) is arranged above the steel bar lifting module and the observation module through a bracket.

9. The automatic battery sample feeding device for the battery impact test according to claim 6, wherein the lifting assembly (4-12) comprises a first steel bar lifting unit (4-1) and a second steel bar lifting unit (4-2) which are symmetrically arranged, two ends of the steel bar (7) are respectively connected with the first steel bar lifting unit (4-1) and the second steel bar lifting unit (4-2), and the first steel bar lifting unit (4-1) and the second steel bar lifting unit (4-2) can lift two ends of the steel bar (7) simultaneously.

10. The automatic battery sample feeding device for the battery impact test according to claim 9, wherein each of the first steel bar lifting unit (4-1) and the second steel bar lifting unit (4-2) comprises a lifting unit shell, a spring (4-11) and an electric cylinder (4-12) for lifting, one end of the spring (4-11) is connected to the top of the lifting unit shell, the lower end of the spring (4-11) is connected with an upper compression block, the electric cylinder (4-12) for lifting is arranged on the lower surface of the lifting unit shell, the output end of the electric cylinder (4-12) for lifting is connected with a lower compression block, and the upper compression block and the lower compression block are both provided with arc grooves.