Battery cell acupuncture test device

Abstract

The utility model discloses a testing device for a cell acupuncture test, and relates to the technical field of battery safety test. The cell acupuncture test device is provided with a test chamber, and further comprises a placement platform, an acupuncture assembly, a first driving mechanism, a second driving mechanism, a scrap container and an information collector, the placing platform is arranged in the test chamber and is used for placing a to-be-tested battery cell; the needling assembly is connected with the first driving mechanism, the needling assembly is installed in the test chamber by directly facing the battery cell on the placing platform, and the first driving mechanism can drive the needling assembly to perform a needling test on the battery cell; the second driving mechanism is used for driving the tested battery cell to move to a scrapping station or a standing station, and the scrapping station is provided with a scrapping container filled with saline water; the information collector is connected with the battery cell and used for collecting the temperature and voltage of the battery cell. According to the utility model, the battery cell without thermal runaway after the acupuncture test can be automatically scrapped, and the safety of the acupuncture test of the battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery safety testing, in particular to a battery core puncture test device. Background Art

[0002] Due to the global energy and environmental challenges posed by the automotive industry, the development of new energy vehicles has become a pressing task. New energy vehicles offer an effective solution to the energy and environmental challenges facing transportation. With the continued advancement of green environmental protection, the use of electric vehicles has increased annually. The power battery system is a crucial component of an electric vehicle's powertrain, and its safety performance cannot be ignored. Appropriate testing equipment is crucial for accurate testing. One of the most critical tests is the battery cell needle penetration test, where a fully charged battery cell is directly punctured with a high-performance steel needle to observe whether the cell experiences thermal runaway, fire, or explosion.

[0003] Currently, the process for performing a cell penetration test involves manually installing a fixture and adjusting the preload as required, clamping the cell and placing it on the testing machine. A steel needle is then installed in the machine according to the test standards, and the machine is activated to perform the penetration test. If thermal runaway is triggered, the cell is left for one hour before being manually removed. If thermal runaway is not triggered, the cell must be left for 12 hours or even longer before being manually disassembled. This manual disassembly process carries the risk of fire or explosion. The current cell penetration test presents significant safety risks, low test efficiency, and insufficient equipment utilization when a cell fails. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a battery cell needle penetration test device, which can automatically scrap the battery cells that do not experience thermal runaway after the needle penetration test, thereby improving the safety of the battery cell needle penetration test.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A battery cell puncture test device is provided, comprising a test chamber, the battery cell puncture test device further comprising:

[0007] A placement platform, installed in the test chamber, for placing the battery cell to be tested;

[0008] an acupuncture assembly and a first driving mechanism connected to the acupuncture assembly, wherein the acupuncture assembly is installed in the test chamber facing the battery cell on the placement platform, and the first driving mechanism is capable of driving the acupuncture assembly to perform acupuncture testing on the battery cell on the placement platform;

[0009] A second driving mechanism is used to drive the tested battery cells to move to a scrapping station or a static station, where a scrapping container filled with salt water is provided at the scrapping station;

[0010] The information collector is connected to the battery cell and is used to collect the temperature and voltage of the battery cell.

[0011] As a further solution of the battery cell needle penetration test device, the battery cell needle penetration test device further comprises a static chamber, the static chamber is separated from the test chamber by a partition, and the partition is provided with an escape opening;

[0012] The battery cell puncture test device further includes a conveying device, which passes through the avoidance port, and the upstream end of the conveying device is located at the static position of the test chamber, and the downstream end of the conveying device is located in the static chamber.

[0013] As a further solution of the battery cell needle penetration test device, the conveying device includes a motor, a conveyor belt, and two pulleys cooperating with the conveyor belt, one of the pulleys is located in the test chamber, and the other pulley is located in the static chamber;

[0014] The motor is installed outside the test chamber, and the output shaft of the motor is connected to the pulley in the test chamber; or the motor is installed outside the static chamber, and the output shaft of the motor is connected to the pulley in the static chamber.

[0015] As a further solution of the battery cell puncture test device, the scrap container and the conveying device are respectively located on both sides of the placement platform along the X direction, and the scrap container and the conveying device are located below the placement platform; the second driving mechanism includes a first driving device, a second driving device, a first telescopic rod and a second telescopic rod, the first driving device and the second driving device are respectively installed on the outer sides of two opposite cavity walls of the test chamber along the X direction, the first telescopic rod passes through one side of the cavity wall and is transmission-connected to the first driving device, the second telescopic rod passes through the other opposite cavity wall and is transmission-connected to the second driving device, the lengths of the first telescopic rod and the second telescopic rod extend along the X direction respectively, the first driving device is adjacent to the conveying device, and the second driving device is adjacent to the scrap container; when the tested battery cell has thermal runaway, the second driving device drives the second telescopic rod to push the battery cell to fall onto the conveying device, and when the tested battery cell does not have thermal runaway, the first driving device drives the first telescopic rod to push the battery cell to fall into the scrap container.

[0016] As a further solution of the battery cell puncture test device, a first push plate is fixed to the end of the first telescopic rod away from the first driving device, and the area of ​​the side of the first push plate facing away from the first telescopic rod is larger than the area of ​​the end face of the first telescopic rod; a second push plate is fixed to the end of the second telescopic rod away from the second driving device, and the area of ​​the side of the second push plate facing away from the second telescopic rod is larger than the area of ​​the end face of the second telescopic rod.

[0017] As a further solution of the battery cell puncture test device, the placement platform is installed on the side of the partition located in the test chamber, the puncture assembly includes a splint and a puncture needle, the splint is opposite to the battery cell on the placement platform along the Y direction, the splint is provided with a first through hole along the Y direction for the puncture needle to pass through, the first driving mechanism includes a third driving device and a fourth driving device, the third driving device and the fourth driving device are respectively installed on the outside of the cavity wall facing the splint, the third driving device is connected to the splint, the third driving device can drive the splint to move toward the battery cell and press the battery cell against the partition, the fourth driving device is connected to the puncture needle, the fourth driving device can drive the puncture needle through the first through hole and puncture the battery cell, and the Y direction is perpendicular to the X direction.

[0018] As a further solution of the battery cell puncture test device, the puncture assembly also includes a guide part, and the clamping plate is connected to the cavity wall of the test chamber facing the partition through the guide part, and the guide part is used to guide the movement of the clamping plate along the X direction.

[0019] As a further solution of the battery cell puncture test device, the guide part includes a plurality of guide rods, and a plurality of second through holes corresponding to the guide rods are provided on the cavity wall of the test chamber facing the partition. One end of the guide rod is fixedly connected to the splint, and the other end extends out of the test chamber through the second through hole.

[0020] As a further solution of the battery cell puncture test device, the puncture assembly also includes a limiting portion, which is arranged along the circumference of the guide rod at the end of the guide rod away from the clamping plate. When the puncture needle passes through the battery cell, the limiting portion abuts against the outer wall of the test chamber.

[0021] As a further solution of the battery cell puncture test device, the puncture assembly also includes a fixing plate, which is fixed on the cavity wall of the test chamber facing the partition, and the fixing plate is provided with a plurality of third through holes corresponding to the second through holes, and the guide rod passes through the third through holes and the second through holes and extends to the outside of the test chamber.

[0022] Beneficial effects:

[0023] The present invention collects the temperature and voltage of the battery cell through an information collector, and determines whether the battery cell is in thermal runaway through changes in the battery cell temperature and voltage and whether the battery cell valve is open during the needle test. After the needle test is completed, if the battery cell does not have thermal runaway, the second drive mechanism drives the battery cell to move to the scrapping station and drop it into the salt water in the scrap container, that is, it can be automatically scrapped under the immersion of salt water; if the battery cell has thermal runaway, the second drive mechanism drives the battery cell to move to the static station for static treatment. When the battery cell does not have thermal runaway after the needle test, there is a major safety hazard. The present invention uses the second drive mechanism to push the battery cell that has not had thermal runaway to the scrap container of the scrapping station for scrapping using salt water, thereby avoiding the risk of manual removal of battery cells with major safety hazards.

[0024] After the battery cell puncture test is completed, the battery cell of the present invention can be driven by the second driving mechanism to be transferred to the scrapping station or the static station, at which time the puncture test of the next battery cell can be carried out. Compared with the existing technology, the efficiency of the battery cell puncture test is improved.

[0025] The utility model divides the battery cell puncture test device into a test chamber and a static chamber, integrates the puncture test and scrapping of the battery cell, and transfers the battery cells that have completed the puncture test in time, thereby effectively improving the utilization rate of the battery cell puncture test device.

[0026] In the utility model, during the puncture test, the battery cell is pressed against one side of the partition by using the clamping plate and then the puncture needle is driven to perform the puncture test on the battery cell. The partition not only serves to separate the test chamber and the static chamber, but can also be used together with the clamping plate to clamp and fix the battery cell, without the need to use traditional clamps to clamp and fix the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the battery cell puncture test device according to an embodiment of the present invention.

[0029] Figure 2 The local edge of the battery cell acupuncture test device according to the embodiment of the utility model Figure 1 Schematic diagram of side view from center A.

[0030] Figure 3 This is a B-direction schematic diagram of the first driving mechanism and the acupuncture assembly assembled on the outside of the cavity wall of the test chamber according to an embodiment of the present utility model.

[0031] Figures 1 to 3 middle:

[0032] 1. Battery cells;

[0033] 100. Placement platform; 101. Test chamber; 102. Static chamber; 103. Ventilation port; 200. Acupuncture assembly; 210. Clamp; 220. Acupuncture needle; 230. Guide portion; 240. Limiting portion; 250. Fixing plate; 300. First driving mechanism; 310. First cylinder; 320. First piston rod; 330. Second cylinder; 340. Second piston rod; 400. Second driving mechanism; 410. First driving device; 420. Second driving device; 430. First telescopic rod; 440. Second telescopic rod; 450. First push plate; 460. Second push plate; 500. Waste container; 600. Partition; 610. Avoidance port; 700. Conveying device; 710. Motor; 720. Conveyor belt; 730. Pulley. DETAILED DESCRIPTION

[0034] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0035] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and the like are used solely for descriptive purposes and do not have any special meaning.

[0038] like Figures 1 to 3 As shown, the battery cell puncture test device of this embodiment has a test chamber 101, and the battery cell puncture test device also includes a placement platform 100, a puncture assembly 200, a first drive mechanism 300, a second drive mechanism 400, a scrap container 500 and an information collector (not shown in the figure).

[0039] Among them, the placement platform 100 is installed in the test chamber 101 for placing the battery cell 1 to be tested; the acupuncture component 200 is connected to the first driving mechanism 300, and the acupuncture component 200 is installed in the test chamber 101 facing the battery cell 1 on the placement platform 100. The first driving mechanism 300 can drive the acupuncture component 200 to perform acupuncture test on the battery cell 1 on the placement platform 100; the second driving mechanism 400 is used to drive the battery cell 1 that has completed the test to move to the scrapping station or the static station. The scrapping station is provided with a scrapping container 500 filled with saline; the information collector is connected to the battery cell 1 for collecting the temperature and voltage of the battery cell 1.

[0040] In this embodiment, the temperature and voltage of the battery cell 1 are collected through an information collector. During the needle penetration test, changes in the temperature and voltage of the battery cell 1, as well as whether the valve of the battery cell 1 is open, are used to determine whether the battery cell 1 is experiencing thermal runaway. After the needle penetration test, if the battery cell 1 does not experience thermal runaway, the second drive mechanism 400 drives the battery cell 1 to move to the scrap container 500 at the scrapping station, where the battery cell 1 falls into salt water and is automatically scrapped while immersed in salt water. If the battery cell 1 experiences thermal runaway, the second drive mechanism 400 drives the battery cell 1 to move to the static station for static treatment. After the needle penetration test, if the battery cell 1 does not experience thermal runaway, there is a significant safety hazard. In this embodiment, the second drive mechanism 400 pushes the battery cell 1 that has not experienced thermal runaway to the scrap container 500 at the scrapping station for automatic scrapping using salt water, avoiding the risk of manually removing the battery cell 1 with a significant safety hazard and improving the safety of the needle penetration test of the battery cell 1.

[0041] Furthermore, the battery cell puncture test device also has a static chamber 102, which is separated from the test chamber 101 by a partition 600; the battery cell puncture test device also includes a conveying device 700, and the partition 600 is provided with an avoidance opening 610, the conveying device 700 passes through the avoidance opening 610, and the upstream end of the conveying device 700 is located at the static station of the test chamber 101, and the downstream end of the conveying device 700 is located in the static chamber 102.

[0042] The battery cell 1 experiencing thermal runaway is driven by the second drive mechanism 400 to fall to the upstream end of the conveyor device 700 at the resting station, and is then transferred by the conveyor device 700 to the resting chamber 102 for storage. This embodiment integrates the penetration test and scrapping of the battery cells 1 by dividing the battery cell penetration test apparatus into the test chamber 101 and the resting chamber 102, and promptly transfers the battery cells 1 that have completed the penetration test, effectively improving the utilization rate of the battery cell penetration test apparatus.

[0043] After the battery cell 1 experiencing thermal runaway is transferred to the rest chamber 102 via the conveyor 700, it may explode within the rest chamber 102. The walls of the rest chamber 102 are provided with an explosion-proof layer (not shown in the figure) to improve the safety of the battery cell 1 in the event of an explosion. Furthermore, the walls of the rest chamber 102 are provided with vents 103 for discharging toxic gases and heat emitted by the battery cell 1 in the event of an explosion.

[0044] The test chamber 101 and the rest chamber 102 are each equipped with a sealed door (not shown) for accessing the battery cells 1. After being transferred to the rest chamber 102, the battery cells 1 are placed for one hour before being manually removed to record the post-test data. Battery cells 1 that do not experience thermal runaway are directly sent to the scrapping station and dropped into the salt water in the scrap container 500 for automatic scrapping, eliminating the risk of fire or explosion and improving the safety of the battery cell 1 needle penetration test.

[0045] Furthermore, the conveying device 700 includes a motor 710, a conveyor belt 720, and two pulleys 730 cooperating with the conveyor belt 720, wherein one pulley 730 is located in the test chamber 101, and the other pulley 730 is located in the static chamber 102;

[0046] The motor 710 is installed outside the static chamber 102, and the output shaft of the motor 710 is connected to the pulley 730 inside the static chamber 102; alternatively, the motor 710 is installed outside the test chamber 101, and the output shaft of the motor 710 is connected to the pulley 730 inside the test chamber 101.

[0047] In this embodiment, the motor 710 is installed outside the test chamber 101 and the static chamber 102 to prevent the motor 710 from being damaged when the battery cell 1 explodes.

[0048] Furthermore, the scrap container 500 and the conveying device 700 are respectively located on both sides of the placement platform 100 along the X direction, and the scrap container 500 and the conveying device 700 are located below the placement platform 100; the second driving mechanism 400 includes a first driving device 410, a second driving device 420, a first telescopic rod 430 and a second telescopic rod 440, and the first driving device 410 and the second driving device 420 are respectively installed on the outer sides of the two opposite cavity walls of the test chamber 101 along the X direction, the first telescopic rod 430 passes through one side of the cavity wall and is transmission-connected to the first driving device 410, and the second telescopic rod 440 is installed on the outer sides of the two opposite cavity walls of the test chamber 101 along the X direction. 40 passes through the other side cavity wall opposite to the second driving device 420 for transmission connection, the lengths of the first telescopic rod 430 and the second telescopic rod 440 extend respectively along the X direction, the first driving device 410 is adjacent to the conveying device 700, and the second driving device 420 is adjacent to the scrap container 500; when the tested battery cell 1 has thermal runaway, the second driving device 420 drives the second telescopic rod 440 to push the battery cell 1 to fall onto the conveying device 700; when the tested battery cell 1 does not have thermal runaway, the first driving device 410 drives the first telescopic rod 430 to push the battery cell 1 to fall into the scrap container 500.

[0049] In this embodiment, the scrap container 500 and the conveying device 700 are respectively located on both sides of the placement platform 100 along the X direction and below the placement platform 100. By respectively arranging the first driving device 410 and the second driving device 420 on the outer sides of the two opposite cavity walls of the test chamber 101, the first driving device 410 or the second driving device 420 can be selected to be started according to the voltage and temperature information of the battery cell 1 collected by the information collector and whether the valve of the battery cell 1 is open.

[0050] Furthermore, a first push plate 450 is fixed to the end of the first telescopic rod 430 away from the first driving device 410, and the area of ​​the side of the first push plate 450 facing away from the first telescopic rod 430 is larger than the area of ​​the end face of the first telescopic rod 430; a second push plate 460 is fixed to the end of the second telescopic rod 440 away from the second driving device 420, and the area of ​​the side of the second push plate 460 facing away from the second telescopic rod 440 is larger than the area of ​​the end face of the second telescopic rod 440.

[0051] In this embodiment, by respectively providing a first push plate 450 at the end of the first telescopic rod 430 and a second push plate 460 at the end of the second telescopic rod 440, the contact area between the second driving mechanism 400 and the battery cell 1 can be increased, thereby preventing the second driving mechanism 400 from having too small a contact area when pushing the battery cell 1, causing the battery cell 1 to tilt and be unable to be pushed to the correct work position.

[0052] In this embodiment, the first driving device 410 and the second driving device 420 can use a linear motor (the first telescopic rod 430 and the second telescopic rod 440 are the output shafts of the linear motor), a cylinder or a hydraulic cylinder (the first telescopic rod 430 and the second telescopic rod 440 are the piston rods of the cylinder or the hydraulic cylinder), and the details are not repeated here.

[0053] In other embodiments, the placement platform 100 can also be designed as a flip structure, that is, the second drive mechanism 400 drives the placement platform 100 to flip clockwise, causing the battery cell 1 to fall onto the conveyor 700, or flip it counterclockwise, causing the battery cell 1 to fall into the scrap container 500. Specifically, the second drive mechanism 400 can be a motor, and the placement platform 100 is mounted on the side wall of the test chamber 101 of the partition 600 via a rotating shaft extending in the X direction. The rotating shaft is fixedly connected to the placement platform 100, and one end of the rotating shaft passes through the partition 600 and is fixedly connected to the motor, while the other end is rotatably connected to the chamber wall opposite the partition 600.

[0054] Furthermore, the placement platform 100 is installed on one side of the partition 600 located in the test chamber 101, and the acupuncture assembly 200 includes a splint 210 and a needle 220. The splint 210 is opposite to the battery cell 1 on the placement platform 100 along the Y direction. The splint 210 is provided with a first through hole along the Y direction for the needle 220 to pass through. The first driving mechanism 300 includes a third driving device and a fourth driving device. The third driving device and the fourth driving device are respectively installed on the outside of the cavity wall facing the splint 210. The third driving device is connected to the splint 210, and the third driving device can drive the splint 210 to move toward the battery cell 1 and press the battery cell 1 to fit on the partition 600. The fourth driving device is connected to the needle 220, and the fourth driving device can drive the needle 220 to pass through the first through hole and pierce the battery cell 1. The Y direction is perpendicular to the X direction.

[0055] Among them, the placement platform 100 is installed on the side of the partition 600 facing the puncture assembly 200, and the battery cell 1 is placed on the placement platform 100 and close to the partition 600. During the puncture test, the third drive device first drives the splint 210 to move toward the battery cell 1 until the splint 210 presses the battery cell 1 against the side of the splint 210 close to the battery cell 1 to prevent the battery cell 1 from moving; at this time, the fourth drive device is started again, and the fourth drive device drives the puncture needle 220 to move toward the battery cell 1 until the puncture needle 220 passes through the first through hole on the splint 210 and punctures the battery cell 1; after the puncture test is completed, the fourth drive device and the third drive device drive the puncture needle 220 and the splint 210 to reset in turn.

[0056] In this embodiment, the partition 600 not only serves to separate the test chamber 101 from the static chamber 102 , but can also be used together with the clamping plate 210 to clamp and fix the battery cell 1 , eliminating the need to use a traditional clamp to clamp and fix the battery cell 1 .

[0057] Furthermore, the acupuncture assembly 200 further includes a guide portion 230 , through which the splint 210 is connected to the cavity wall of the test chamber 101 facing the partition 600 , and the guide portion 230 is used to guide the movement of the splint 210 along the X direction.

[0058] The guide portion 230 is provided to guide the movement of the clamping plate 210 along the X direction, thereby improving the stability of the clamping plate 210 moving along the X direction and enabling the clamping plate 210 to maintain surface contact with the battery cell 1 when abutting against the battery cell 1, thereby improving the position stability of the battery cell 1 during the needling process.

[0059] Optionally, the guide portion 230 includes a plurality of guide rods, and a plurality of second through holes corresponding to the guide rods are provided on the cavity wall of the test chamber 101 facing the partition 600. One end of the guide rod is fixedly connected to the splint 210, and the other end extends through the second through hole to the outside of the test chamber 101.

[0060] Specifically, the splint 210 is a rectangular plate-like structure, the thickness of which extends along the X direction. There are four guide rods, which are fixedly connected to the four corner positions of the splint 210 respectively. When the third driving device drives the splint 210 to move, the four guide rods move along the axial direction of the four second through holes respectively to guide the movement of the splint 210.

[0061] Of course, in other embodiments, the guide portion 230 can also be configured as a structure in which a slide groove and a slider cooperate, wherein the slider can be disposed below the splint 210 and fixedly connected to the cavity wall of the test chamber 101, the length of the slider extends along the X direction, and the slide groove is recessed at the bottom of the splint 210 and slidably cooperates with the slider, and the details are not repeated here.

[0062] Furthermore, the puncture assembly 200 also includes a limiting portion 240, which is arranged along the circumference of the guide rod at one end of the guide rod away from the splint 210. When the puncture needle 220 passes through the battery cell 1, the limiting portion 240 abuts against the outer wall of the test chamber 101.

[0063] The limiting portion 240 is used to prevent the guide rod from escaping from the second through hole on the wall of the test chamber 101 , thereby affecting the movement stability of the clamping plate 210 , and at the same time preventing the needle 220 from excessively puncturing the battery cell 1 and damaging the partition 600 .

[0064] Furthermore, the acupuncture assembly 200 also includes a fixing plate 250, which is fixed on the cavity wall of the test chamber 101 facing the partition 600. The fixing plate 250 is provided with a plurality of third through holes corresponding to the second through holes, and the guide rod extends through the third through holes and the second through holes to the outside of the test chamber 101.

[0065] By providing the fixing plate 250 and opening the third through hole on the fixing plate 250 , the guide rod is guided and matched with the second through hole and the third through hole at the same time, thereby increasing the guiding contact surface and thus enhancing the guiding stability.

[0066] In other embodiments, the fixing plate 250 may be replaced with four guide sleeves, which are respectively fixed at the four second through holes and cooperate with the four guide rods for guidance.

[0067] In this embodiment, the third driving device may be a first air cylinder, comprising a first cylinder body 310 and a first piston rod 320. The first cylinder body 310 is fixed to the outside of the chamber wall. The first piston rod 320 extends through the chamber wall and the fixing plate 250 into the test chamber 101 and is fixedly connected to the clamping plate 210. Similarly, the fourth driving device may be a second air cylinder, comprising a second cylinder body 330 and a second piston rod 340. The second cylinder body 330 is fixed to the outside of the chamber wall and is located below the first cylinder body 310. The second piston rod 340 extends through the chamber wall and the fixing plate 250 into the test chamber 101 and is fixedly connected to the needle 220.

[0068] Of course, in other embodiments, the third drive device and the fourth drive device may also be hydraulic cylinders. Alternatively, the third drive device and the fourth drive device may be linear motors, which will not be described in detail.

[0069] In this embodiment, the clamping plate 210 , the needle 220 , the guide portion 230 , the fixing plate 250 , and the waste container 500 are all made of stainless steel.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell acupuncture test device having a test chamber, characterized in that: The battery core puncture test device also includes: A placement platform, installed in the test chamber, for placing the battery cell to be tested; an acupuncture assembly and a first driving mechanism connected to the acupuncture assembly, wherein the acupuncture assembly is installed in the test chamber facing the battery cell on the placement platform, and the first driving mechanism is capable of driving the acupuncture assembly to perform acupuncture testing on the battery cell on the placement platform; A second driving mechanism is used to drive the tested battery cells to move to a scrapping station or a static station, where a scrapping container filled with salt water is provided at the scrapping station; The information collector is connected to the battery cell and is used to collect the temperature and voltage of the battery cell.

2. The battery cell acupuncture test device according to claim 1, characterized in that: The battery cell puncture test device further comprises a static chamber, the static chamber is separated from the test chamber by a partition, and the partition is provided with an escape opening; The battery cell puncture test device further includes a conveying device, which passes through the avoidance port, and the upstream end of the conveying device is located at the static position of the test chamber, and the downstream end of the conveying device is located in the static chamber.

3. The battery cell puncture test device according to claim 2, characterized in that: The conveying device includes a motor, a conveyor belt, and two pulleys cooperating with the conveyor belt, wherein one of the pulleys is located in the test chamber, and the other pulley is located in the static chamber; The motor is installed outside the test chamber, and the output shaft of the motor is connected to the pulley in the test chamber; or the motor is installed outside the static chamber, and the output shaft of the motor is connected to the pulley in the static chamber.

4. The battery cell puncture test device according to claim 2, characterized in that: The scrap container and the conveying device are respectively located on both sides of the placement platform along the X direction, and the scrap container and the conveying device are located below the placement platform; the second driving mechanism includes a first driving device, a second driving device, a first telescopic rod, and a second telescopic rod, the first driving device and the second driving device are respectively installed on the outsides of two opposite cavity walls of the test chamber along the X direction, the first telescopic rod passes through one side of the cavity wall and is transmission-connected to the first driving device, the second telescopic rod passes through the other opposite cavity wall and is transmission-connected to the second driving device, the lengths of the first telescopic rod and the second telescopic rod respectively extend along the X direction, the first driving device is adjacent to the conveying device, and the second driving device is adjacent to the scrap container; When thermal runaway occurs in the tested battery cell, the second driving device drives the second telescopic rod to push the battery cell to fall onto the conveying device; when thermal runaway does not occur in the tested battery cell, the first driving device drives the first telescopic rod to push the battery cell to fall into the scrap container.

5. The battery cell acupuncture test device according to claim 4, characterized in that: A first push plate is fixed to the end of the first telescopic rod away from the first driving device, and the area of ​​the side of the first push plate facing away from the first telescopic rod is larger than the area of ​​the end face of the first telescopic rod; a second push plate is fixed to the end of the second telescopic rod away from the second driving device, and the area of ​​the side of the second push plate facing away from the second telescopic rod is larger than the area of ​​the end face of the second telescopic rod.

6. The battery cell acupuncture test device according to claim 4 or 5, characterized in that: The placement platform is installed on the side of the partition located in the test chamber, the acupuncture assembly includes a splint and a needle, the splint is opposite to the battery cell on the placement platform along the Y direction, the splint is provided with a first through hole along the Y direction for the needle to pass through, the first driving mechanism includes a third driving device and a fourth driving device, the third driving device and the fourth driving device are respectively installed on the outside of the cavity wall facing the splint, the third driving device is connected to the splint, the third driving device can drive the splint to move toward the battery cell and press the battery cell to fit on the partition, the fourth driving device is connected to the needle, the fourth driving device can drive the needle to pass through the first through hole and pierce the battery cell, the Y direction is perpendicular to the X direction.

7. The battery cell puncture test device according to claim 6, characterized in that: The acupuncture assembly further includes a guide portion, through which the clamping plate is connected to the cavity wall of the test chamber facing the partition, and the guide portion is used to guide the movement of the clamping plate along the X direction.

8. The battery cell puncture test device according to claim 7, characterized in that: The guide portion includes a plurality of guide rods, and a plurality of second through holes corresponding to the guide rods are provided on the cavity wall of the test chamber facing the partition. One end of the guide rod is fixedly connected to the splint, and the other end extends through the second through hole to outside the test chamber.

9. The battery cell acupuncture test device according to claim 8, characterized in that: The puncture assembly further includes a limiting portion, which is arranged along the circumference of the guide rod at one end of the guide rod away from the clamping plate. When the puncture needle passes through the battery cell, the limiting portion abuts against the outer wall of the test chamber.

10. The battery cell acupuncture test device according to claim 8, characterized in that: The acupuncture assembly also includes a fixing plate, which is fixed on the cavity wall of the test chamber facing the partition, and the fixing plate is provided with a plurality of third through holes corresponding to the second through holes, and the guide rod passes through the third through holes and the second through holes and extends to the outside of the test chamber.

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