Lithium battery puncture testing machine

Abstract

The lithium battery puncture testing machine is characterized in that the lithium battery puncture testing machine comprises a rack, a main gantry stand column and an auxiliary gantry stand column, the main gantry stand column and the auxiliary gantry stand column are fixedly arranged on the rack, and the main gantry stand column and the auxiliary gantry stand column form two sets of tightly-attached gantry frame mechanisms; a battery conveying mechanism is arranged below the portal frame mechanism, a lithium battery body to be tested is fixedly clamped on the battery conveying mechanism, a first testing device is arranged on the main portal frame, and a mechanism for driving a puncture needle to pierce the lithium battery body is arranged on the first testing device; a second testing device is arranged on the auxiliary portal frame, and a mechanism for driving a puncture needle to pierce the lithium battery body is arranged on the second testing device; the speed of driving the puncture needle by the first testing device is smaller than that of driving the puncture needle by the second puncture device. Two sets of four puncture points are arranged, puncture can be conducted at a low speed and a high speed respectively, the actual situation is better simulated, and the safety performance of the battery is tested.

Description

Technical Field

[0001] This application relates to power battery manufacturing and testing equipment, specifically to a lithium battery puncture test machine. Background Technology

[0002] With the increasing use of power batteries, especially lithium batteries, in automobile production and manufacturing, the safety requirements for batteries under various extreme conditions are also becoming more stringent. Among the various tests for power batteries, puncture tests, which primarily assess fire or flammability risks, are increasingly appearing in the requirements for evaluating the safety of a power battery. Existing puncture testing machines are relatively simple, only capable of performing slow puncture operations at a single point, making it difficult to realistically simulate battery safety under impact and collision conditions.

[0003] A search revealed several puncture test protocols. For example, CN117347177A discloses a multi-angle puncture test detection device for lithium battery separators. This device includes a fixed base with a column mounted on it. A lifting platform is slidably mounted on the column, and a puncture needle is mounted on the lifting platform. A separator clamp is located at the bottom of the puncture needle. The device also includes a turntable rotatably mounted at the bottom of the lifting platform; an angle adjustment component movably mounted between the turntable and the puncture needle; and a clamping component movably mounted within the angle adjustment component. This invention utilizes the cooperation between the angle adjustment component and the turntable. An angle adjustment rod can drive an angle adjustment ball to deflect within a hollow sphere, thereby causing the puncture needle to deflect vertically. Rotating the turntable allows the puncture needle to rotate horizontally, enabling adjustments to various angles of the puncture needle. Furthermore, by using multiple sensors, the device can detect the puncture force on the lithium battery separator at various angles, as well as the displacement and deformation generated during puncture.

[0004] However, such solutions are generally one-time, slow puncture functions at a single test point, which differ significantly from the actual operating conditions encountered by lithium batteries in real-world use. Utility Model Content

[0005] (I) Technical Issues

[0006] In view of the above-mentioned existing technologies, there is an urgent need to design a puncture test device that can simulate different working conditions and thus better reflect reality.

[0007] (2) Technical solution

[0008] To address the aforementioned technical problems, this application proposes a lithium battery puncture testing machine, characterized in that: it includes a frame, a main gantry column and a secondary gantry column fixedly mounted on the frame, the main gantry column and the secondary gantry column forming two closely fitted gantry mechanisms; a battery conveying mechanism is provided below the gantry mechanisms, the lithium battery to be tested is clamped on the battery conveying mechanism, a first testing device is provided on the main gantry, the first testing device is provided with a mechanism for driving a puncture needle to puncture the lithium battery; a second testing device is provided on the secondary gantry, the second testing device is provided with a mechanism for driving a puncture needle to puncture the lithium battery; the speed at which the first testing device drives the puncture needle is less than the speed at which the second puncture device drives the puncture needle.

[0009] Furthermore, the first testing device uses a hydraulic cylinder rod to drive the puncture needle; the second testing device uses a pneumatic cylinder to drive the puncture needle.

[0010] Furthermore, the first testing device includes two sets of hydraulic cylinder mechanisms, each equipped with a puncture needle. The hydraulic cylinder mechanisms are both mounted on the main testing crossbeam, which is raised and lowered on the main gantry via a main lifting mechanism.

[0011] Furthermore, the first testing device is equipped with a servo drive motor fixedly installed on the main testing crossbeam. The servo drive motor is connected to a transmission screw via a coupling. The other end of the transmission screw is installed on the other end of the main testing crossbeam via a bearing seat. Two sets of hydraulic cylinder mechanisms equipped with puncture needles are installed on the transmission screw via a screw slider. The installation interval of the two sets of hydraulic cylinder mechanisms is determined by the shape characteristics of the lithium battery to be tested.

[0012] Furthermore, the second testing device includes two sets of cylinder mechanisms, each equipped with a puncture needle. The cylinder mechanisms are both mounted on the secondary testing crossbeam, which is raised and lowered on the secondary gantry via a secondary lifting mechanism.

[0013] Furthermore, the second testing device is equipped with a servo drive motor fixedly mounted on the secondary testing crossbeam. The servo drive motor is connected to a transmission screw via a coupling. The other end of the transmission screw is mounted on the other end of the secondary testing crossbeam via a bearing seat. Two sets of cylinder mechanisms equipped with puncture needles are mounted on the transmission screw via a screw slider. The installation interval of the two sets of cylinder mechanisms is determined by the shape characteristics of the lithium battery to be tested.

[0014] Furthermore, the hydraulic cylinder mechanism and the pneumatic cylinder mechanism are respectively mounted on the main test beam and the auxiliary test beam via a lead screw mechanism, and are driven to change their lateral positions via their respective displacement mechanisms.

[0015] Furthermore, the lithium battery is mounted on a guide rail using a clamp.

[0016] (3) Beneficial effects

[0017] This application firstly enriches the selection of puncture test positions through the setting of a gantry and guide rails. Secondly, it sets up two sets of four puncture points, allowing for punctures at both slow and fast speeds to better simulate actual conditions and test the battery's safety performance. Specifically, while existing technologies use hydraulically driven puncture needles to achieve a slow experimental process, this application sets up multiple sets of hydraulically driven puncture needles, which can simulate the lithium battery damage process under complex destructive conditions. On the other hand, this application innovatively sets up pneumatically driven fast puncture needles, which more closely resemble the damage speed of power batteries in actual use, making the experimental results more realistic and reliable. Furthermore, because multiple test points and testing mechanisms are set up, this application also innovatively sets up a double-sided gantry structure, which uses the same gantry lifting mechanism to achieve the lifting and driving of four test heads for both types of testing equipment. The design is novel and the structure is simple. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure according to this application;

[0020] Figure 2 A schematic diagram of the structure of this application viewed from another perspective;

[0021] Figure 3 A schematic diagram of the structure of this application viewed from another perspective;

[0022] Figure 4 A schematic diagram of the structure of this application as viewed from another direction;

[0023] Figure 5 The schematic diagram of this application is to conceal mechanisms such as the gantry.

[0024] Figure Labels

[0025] 1. Rack

[0026] 2. Main gate pillars

[0027] 3. Secondary gantry pillars

[0028] 4. Battery delivery mechanism

[0029] 5. Secondary test beam

[0030] 6. Main test beam

[0031] 7. Lithium battery body

[0032] 8. Main lifting mechanism

[0033] 9. Auxiliary lifting mechanism

[0034] 10. First testing device

[0035] 11. Second testing device

[0036] 12. Puncture needle

[0037] 13. Main shifting mechanism

[0038] 14. Lead screw mechanism

[0039] 15. Guide rail

[0040] 16. Fixture Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] like Figure 1 As shown, a lithium battery puncture testing machine according to this application is characterized by: a frame 1, a main gantry column 2 and a secondary gantry column 3 fixedly mounted on the frame 1, the main gantry column 2 and the secondary gantry column 3 forming two sets of closely fitted gantry mechanisms; a battery conveying mechanism 4 is provided below the gantry mechanism, the lithium battery body 7 to be tested is fixedly clamped on the battery conveying mechanism 4; a first testing device 10 is provided on the main gantry, the first testing device 10 being provided with a mechanism for driving a puncture needle 12 to puncture the lithium battery body 7; a second testing device 11 is provided on the secondary gantry, the second testing device 11 being provided with a mechanism for driving a puncture needle 12 to puncture the lithium battery body 7; the speed at which the first testing device 10 drives the puncture needle 12 is less than the speed at which the second puncture device drives the puncture needle 12.

[0043] Furthermore, the first testing device 10 uses a hydraulic cylinder rod to drive the puncture needle 12; the second testing device 11 uses a pneumatic cylinder to drive the puncture needle 12.

[0044] As is well known, hydraulically driven working heads have a relatively slow feed speed, while pneumatic heads can have an extremely fast feed speed when the pressure of the pneumatic components is sufficient.

[0045] This solution designs puncture needles 12 with different puncture speeds and actually uses both hydraulic and pneumatic methods to achieve this requirement. Firstly, based on existing battery manufacturing standards, which generally rely on hydraulic puncture testing machines, the hydraulic puncture testing component of this application is designed to align with and be compatible with existing production standards. However, with technological advancements, the safety requirements for lithium batteries are becoming increasingly stringent, necessitating a transition to more practical pneumatic puncture. This application, based on the two types of puncture needle 12 drives, also incorporates multiple working heads, closely reflecting the actual damage patterns of lithium batteries and thus testing requirements.

[0046] Furthermore, the first testing device 10 includes two sets of hydraulic cylinder mechanisms, each equipped with a puncture needle 12. The hydraulic cylinder mechanisms are both mounted on the main testing beam 6, which is raised and lowered on the main gantry via the main lifting mechanism 8.

[0047] Furthermore, the first testing device is equipped with a servo drive motor fixedly installed on the main testing beam 6. The servo drive motor is connected to a transmission screw via a coupling. The other end of the transmission screw is installed on the other end of the main testing beam 6 via a bearing seat. Two sets of hydraulic cylinder mechanisms equipped with puncture needles are installed on the transmission screw via a screw slider. The installation interval of the two sets of hydraulic cylinder mechanisms is determined by the shape characteristics of the lithium battery to be tested.

[0048] Furthermore, the second testing device 11 includes two sets of cylinder mechanisms, each equipped with a puncture needle 12. The cylinder mechanisms are both mounted on the secondary testing crossbeam 5, which is raised and lowered on the secondary gantry via the secondary lifting mechanism 9.

[0049] Furthermore, the second testing device is equipped with a servo drive motor fixedly installed on the secondary testing crossbeam 5. The servo drive motor is connected to a transmission screw via a coupling. The other end of the transmission screw is installed on the other end of the secondary testing crossbeam 5 via a bearing seat. Two sets of cylinder mechanisms equipped with puncture needles are installed on the transmission screw via a screw slider. The installation interval of the two sets of cylinder mechanisms is determined by the shape characteristics of the lithium battery to be tested.

[0050] Furthermore, the hydraulic cylinder mechanism and the pneumatic cylinder mechanism are respectively mounted on the main test beam 6 and the auxiliary test beam 5 via the lead screw mechanism 14, and are driven to change their lateral positions via their respective displacement mechanisms.

[0051] Furthermore, the lithium battery body 7 is mounted on the guide rail 15 by a clamp 16.

[0052] In use, first install the lithium battery body 7 on the guide rail 15 and adjust it to a position convenient for fire extinguishing and observation. Simultaneously, adjust the main lifting mechanism 8 and the auxiliary lifting mechanism 9 to bring the two test beams close to the battery body under test. Then, use the shifting mechanism to align the puncture needle 12 with the position to be measured. Next, activate the hydraulic cylinder or pneumatic cylinder according to the test requirements to perform the puncture. Because the hydraulic cylinder operates slowly, it can simulate the traditional puncture test process; the pneumatic cylinder has a large explosive force (a cylinder with sufficient compression ratio should be selected here), and the needle ejection speed is very fast, which can simulate the battery damage state during a real vehicle collision. Multiple puncture needles 12 can be used simultaneously, or they can be used separately according to the test conditions.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lithium battery puncture testing machine, characterized in that: The device includes a frame, a main gantry column and a secondary gantry column fixedly mounted on the frame, the main gantry column and the secondary gantry column forming two closely fitted gantry mechanisms; a battery conveying mechanism is provided below the gantry mechanism, and the lithium battery to be tested is clamped on the battery conveying mechanism; a first testing device is provided on the main gantry column, and the first testing device is provided with a mechanism for driving a puncture needle to pierce the lithium battery; a second testing device is provided on the secondary gantry column, and the second testing device is provided with a mechanism for driving a puncture needle to pierce the lithium battery; the speed at which the first testing device drives the puncture needle is less than the speed at which the second puncture device drives the puncture needle.

2. The lithium battery puncture testing machine according to claim 1, characterized in that: The first testing device uses a hydraulic cylinder rod to drive the puncture needle; the second testing device uses a pneumatic cylinder to drive the puncture needle.

3. The lithium battery puncture testing machine according to claim 2, characterized in that: The first testing device includes two sets of hydraulic cylinder mechanisms, each equipped with a puncture needle. The hydraulic cylinder mechanisms are both mounted on the main testing crossbeam, which is raised and lowered on the main gantry column via a main lifting mechanism.

4. A lithium battery puncture testing machine according to claim 3, characterized in that: The second testing device includes two sets of cylinder mechanisms, each equipped with a puncture needle. The cylinder mechanisms are both mounted on the secondary testing crossbeam, which is raised and lowered on the secondary gantry column via a secondary lifting mechanism.

5. A lithium battery puncture testing machine according to claim 4, characterized in that: The hydraulic cylinder mechanism and the pneumatic cylinder mechanism are respectively mounted on the main test beam and the auxiliary test beam via a lead screw mechanism, and are driven to change their lateral positions via their respective displacement mechanisms.

6. A lithium battery puncture testing machine according to claim 5, characterized in that: The lithium battery is mounted on a guide rail using a clamp.

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