Knife chopping testing device
An automated knife-cutting test device, which combines a continuously variable speed cylinder and a switch sensor, solves the problems of inaccurate lithium-ion battery test results and safety hazards in existing technologies, and achieves high-precision and safe battery testing.
Patent Information
- Application Number
- CN202422875863.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing lithium-ion battery knife-cutting test devices are difficult to control precisely in terms of force and speed, and are prone to human error and safety hazards.
The knife-cutting test device, which uses a stepless speed-regulating cylinder and a switch sensor, controls the start and stop of the stepless speed-regulating cylinder through a controller. Combined with the guide assembly and fire extinguishing nozzle, it achieves automated testing and avoids manual operation.
It improves the accuracy and security of test results, avoids human error and safety hazards, and ensures the convenience and reliability of the testing process.
Smart Images
Figure CN223551849U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery testing technology, and in particular to a knife-cut test device. Background Technology
[0002] The cut test for lithium-ion batteries is an unconventional testing method, and currently there is no unified industry standard to regulate the specific parameters of the cut test. The cut test is mainly used to evaluate the battery's safety performance when subjected to physical damage, aiming to simulate accidental physical injuries that the battery may suffer, such as impacts in traffic accidents, to ensure the battery's safety and reliability under normal operating conditions. Existing testing equipment struggles to precisely control the force and speed of the cut, resulting in low accuracy and precision of the test results. Manual operation is prone to introducing human error, increasing the complexity and cost of the test; furthermore, existing testing equipment lacks protective measures, posing safety hazards to workers during operation. Utility Model Content
[0003] The technical problem this invention aims to solve is: how to address the issues of low accuracy and precision in test results and potential safety hazards in existing technologies.
[0004] To address the aforementioned technical problems, this utility model provides a knife-cutting test device, having intersecting first, second, and third directions, for battery cell testing, comprising:
[0005] The enclosure has a clamp inside for fixing the battery cells, and the enclosure has a door.
[0006] A movable plate is located inside the box, and a blade is provided on the side of the movable plate near the clamp.
[0007] A continuously variable speed cylinder is connected to the housing, and the piston end of the continuously variable speed cylinder is connected to the movable plate. The continuously variable speed cylinder can drive the movable plate to move closer to or away from the battery cell along the third direction.
[0008] A switch sensor, disposed in the enclosure or door, configured to output an electrical signal based on the closed or open state of the door; and
[0009] The controller is electrically connected to both the switch sensor and the continuously variable cylinder, and the controller is configured to control the start and stop of the continuously variable cylinder according to the electrical signal.
[0010] More preferably, the knife-cutting test device further includes:
[0011] A guide assembly is disposed inside the housing, and the movable plate is connected to the guide assembly and is capable of moving along the third direction.
[0012] More preferably, the guide component includes:
[0013] At least one guide post is disposed inside the housing along the third direction, and the guide post is slidably provided with a bushing, and the movable plate is connected to the bushing.
[0014] More preferably, the blade is detachably connected to the movable plate, and the angle between the plane of the blade and the plane of the movable plate is 0 to 180°.
[0015] More preferably, there are two continuously variable cylinders arranged opposite each other in the second direction.
[0016] More preferably, the end of the housing away from the continuously variable speed cylinder is provided with a clearance groove, and the clearance groove corresponds to the blade in the third direction.
[0017] More preferably, one end of the door is rotatably connected to the box body, and the other end is provided with a door latch, which is fastened to the box body to form a sealed space.
[0018] More preferably, the box door has an observation window.
[0019] More preferably, the clamp includes clamping plates disposed opposite each other in the second direction, the clamping plates having an elongated groove extending along the second direction.
[0020] More preferably, the knife-cutting test device further includes a fire extinguishing nozzle, which is located inside the housing and is configured to spray a fire extinguishing medium when the battery cell catches fire.
[0021] Compared with the prior art, the knife-cutting test device provided by this utility model has the following advantages:
[0022] This invention utilizes a switch sensor in conjunction with a continuously variable speed cylinder to stop the cylinder's operation when the chamber door is opened, providing protection and preventing safety hazards caused by worker misoperation. This greatly ensures the convenience and safety of testing. Furthermore, the continuously variable speed cylinder effectively controls the accuracy, force, and speed of the knife strike, further improving the precision and accuracy of the test results. In addition, this invention eliminates the need for manual operation during testing, avoiding human error and further enhancing test accuracy. Attached Figure Description
[0023] Figure 1This is a schematic diagram of the knife-cutting test device described in this utility model.
[0024] Figure 2 This is a schematic diagram of the structure of the knife-cutting test device hidden behind the door of the present invention.
[0025] Figure 3 This utility model Figure 2 The main view.
[0026] Figure 4 This is a schematic diagram of the internal structure of the box described in this utility model.
[0027] Figure label:
[0028] 100. Knife-cutting test device; 110. Box body; 111. Clearance groove; 120. Box door; 121. Door latch; 122. Observation window; 130. Stepless speed regulating cylinder; 140. Guide assembly; 141. Guide column; 142. Bushing; 150. Fire extinguishing nozzle; 160. Movable plate; 170. Blade; 180. Clamp; 181. Clamping plate; 182. Long groove;
[0029] 200. Battery cell;
[0030] X, first direction; Y, second direction; Z, third direction. Detailed Implementation
[0031] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0034] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0037] like Figures 1 to 4 As shown, this embodiment provides a knife-cutting test device 100 for testing battery cells 200. The knife-cutting test device 100 has a first direction X, a second direction Y and a third direction Z that intersect each other.
[0038] In some implementations, the first direction X, the second direction Y, and the third direction Z intersect each other perpendicularly.
[0039] In some embodiments, the knife-cutting test device 100 includes a housing 110, a continuously variable cylinder 130, a movable plate 160, a switch sensor, and a controller.
[0040] In some embodiments, the housing 110 is provided with a clamp 180 for fixing the battery cell 200 inside. The housing 110 is provided with a door 120. One end of the door 120 is rotatably connected to the housing 110, and the other end is provided with a door latch 121. The door latch 121 is fastened to the housing 110 to form a sealed space, so as to avoid the influence of external factors during the test. At the same time, it can prevent explosions, fires or leakage of hazardous substances that may occur due to improper operation, and reduce the threat to test personnel and the surrounding environment.
[0041] In some implementations, a switch sensor can be set corresponding to the door latch 121. The switch sensor is triggered only when the door latch 121 is locked, so as to avoid safety hazards caused by worker misoperation.
[0042] In some implementations, the switch sensor can be any of a magnetic proximity switch, a capacitive proximity switch, an inductive proximity switch, or a photoelectric proximity switch.
[0043] In some embodiments, the movable plate 160 is disposed inside the housing 110, and the movable plate 160 is provided with a blade 170 on the side near the clamp 180. The continuously variable speed cylinder 130 is connected to the housing 110, and the piston end of the continuously variable speed cylinder 130 is connected to the movable plate 160. The continuously variable speed cylinder 130 can drive the movable plate 160 to move closer to or away from the battery cell 200 along the third direction Z. The use of a continuously variable speed cylinder can effectively control the accuracy, force and speed of the blade cut, and can improve the precision and accuracy of the test results.
[0044] In some embodiments, a switch sensor is located in the housing 110 or the door 120. The switch sensor is configured to output an electrical signal according to the closed or open state of the door 120. Both the switch sensor and the continuously variable cylinder 130 are electrically connected to a controller. The controller is configured to control the start and stop of the continuously variable cylinder 130 according to the electrical signal. This allows the continuously variable cylinder 130 to stop operating when the door 120 is open, thus providing protection and preventing safety hazards caused by worker misoperation. This greatly ensures the convenience and safety of testing.
[0045] In some embodiments, the knife-cutting test device further includes a guide assembly 140, which is disposed inside the housing 110. The movable plate 160 is connected to the guide assembly 140 and is capable of moving along the third direction Z. Specifically, the guide assembly 140 includes at least one guide post 141, which is disposed inside the housing 110 along the third direction Z. The guide post 141 is slidably provided with a bushing 142, and the movable plate 160 is connected to the bushing 142. Through the bushing 142 and the guide post 141, the accuracy of the movable plate 160 in moving along the third direction Z can be ensured, thereby ensuring the reliability of the test results.
[0046] In some embodiments, four guide posts 141 are preferably arranged in a rectangular shape to prevent the movable plate 160 from shifting when it moves in the Z direction.
[0047] In some embodiments, when performing a knife-cutting test on the battery cell 200, after the battery cell 200 is fixed by the clamp 180, the stepless speed-regulating cylinder 130 adjusts the cutting force and speed according to the set parameters, so that the blade 170 can cut the battery cell 200 with a specific force and speed, thereby ensuring the accuracy of the test results.
[0048] It should be noted that the switch sensor and the stepless speed-regulating cylinder 130 of this utility model do not require manual operation. The stepless speed-regulating cylinder 130 is used to realize non-contact knife cutting test, which can avoid human error and reduce safety hazards.
[0049] In some implementations, to facilitate the replacement of different types of blades 170 for cutting tests on the battery cell 200, the blade 170 is detachably connected to the movable plate 160. The detachable connection can be a bolt connection or a snap-fit connection.
[0050] In some implementations, to meet the requirements of different angle cut tests, the angle between the plane where the blade 170 is located and the plane where the movable plate 160 is located is 0 to 180°, so as to simulate the accidental physical damage that the battery may suffer, such as impacts at different angles in traffic accidents, to ensure that the battery is safe and reliable under normal use conditions and to obtain more accurate test results.
[0051] In some implementations, there are two continuously variable speed cylinders 130 arranged opposite each other in the second direction Y. This ensures the cutting force and speed, as well as the stability of the blade 170, so that the blade 170 can cut the battery cell 200 with the set force, angle and speed, thus ensuring the accuracy of the test results.
[0052] In some embodiments, to prevent the blade 170 from colliding with the housing 110 and being damaged, a clearance groove 111 is provided at the end of the housing 110 away from the continuously variable speed cylinder 130. The clearance groove 111 corresponds to the blade 170 in the third direction Z. During the blade cutting test, after the battery cell 200 is cut off, the blade 170 can extend into the clearance groove 111 to prevent the blade 170 or the housing 110 from being damaged.
[0053] In some embodiments, since there are two continuously variable speed cylinders 130 and they are arranged opposite each other in the second direction Y, in order to ensure the stability of the blade 170, both the blade 170 and the clearance groove 111 extend along the first direction X, so that the two continuously variable speed cylinders 130 are located on opposite sides of the blade 170, so as to ensure the stability of the blade 170 moving in the third direction Z.
[0054] In some embodiments, the door 120 is provided with an observation window 122 to facilitate observation of the interior of the box 110 and to facilitate recording the knife-cutting test process.
[0055] In some embodiments, the clamp 180 includes clamping plates 181 disposed opposite each other in the second direction Y. The clamping plates 181 have an elongated groove 182 extending in the second direction Y. The clamping plates 181 are connected to the housing 110 by fasteners, which pass through the elongated groove 182. The purpose of the elongated groove 182 is to allow the clamping plates 181 to move in the second direction Y, thereby adjusting the distance between the two opposing clamping plates 181 to meet the clamping and fixing of battery cells 200 of different sizes, thus having wide applicability.
[0056] In some implementations, the fastener is preferably a bolt.
[0057] Furthermore, as a risk test, the knife-cutting test carries a high level of safety risk. Improper operation may lead to explosions, fires, or leaks of hazardous substances, posing a threat to test personnel and the surrounding environment. Therefore, in some embodiments, the knife-cutting test device 100 also includes a fire extinguishing nozzle 150, which is located inside the housing 110 and is configured to spray a fire extinguishing medium when the battery cell 200 catches fire.
[0058] In some embodiments, the fire extinguishing nozzle 150 is mounted on the movable plate 160, and the fire extinguishing nozzle 150 and the blade 170 are located on the same side of the movable plate 160. Specifically, the extinguishing medium is stored in the fire extinguisher, and the fire extinguishing nozzle 150 is connected to the fire extinguisher via a hose. Thus, when the blade 170 performs a cutting test on the battery cell 200, if a fire occurs, the fire extinguishing nozzle 150 sprays the extinguishing medium to extinguish the fire, thereby improving the safety of the test.
[0059] In some implementations, the extinguishing medium can be any one of water, foam extinguishing agent, carbon dioxide, or dry powder extinguishing agent.
[0060] In summary, the knife-cutting test device provided by this utility model utilizes a switch sensor in conjunction with a continuously variable speed cylinder. This allows the cylinder to stop operating when the chamber door is opened, providing protection and preventing safety hazards caused by worker misoperation. This greatly ensures the convenience and safety of the test. Furthermore, the continuously variable speed cylinder effectively controls the accuracy, force, and speed of the knife cut, further improving the precision and accuracy of the test results. Additionally, this utility model eliminates the need for manual operation during testing, avoiding human error and further improving test accuracy. Moreover, it can extinguish fires in case of ignition, thus enhancing test safety.
[0061] The above description is merely a preferred embodiment of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model. The basic principles, main features, and advantages of this utility model have been shown and described above. For those skilled in the art, it is obvious that this utility model is not limited to the details of the above preferred embodiments. The embodiments should be considered exemplary and non-limiting. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included within this utility model.
[0062] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A knife-cut test device, having intersecting first direction (X), second direction (Y) and third direction (Z), for testing battery cells (200), characterized in that, include: The housing (110) is provided with a clamp (180) for fixing the battery cell (200) inside, and the housing (110) is provided with a door (120); Movable plate (160), the movable plate (160) is disposed inside the housing (110), and the movable plate (160) has a blade (170) on the side near the clamp (180); A continuously variable speed cylinder (130) is connected to the housing (110), and the piston end of the continuously variable speed cylinder (130) is connected to the movable plate (160). The continuously variable speed cylinder (130) can drive the movable plate (160) to move closer to or further away from the battery cell (200) along the third direction (Z). A switch sensor is disposed in the housing (110) or the door (120), and the switch sensor is configured to output an electrical signal according to the closed or open state of the door (120); as well as The controller is electrically connected to both the switch sensor and the continuously variable cylinder (130), and the controller is configured to control the start and stop of the continuously variable cylinder (130) according to the electrical signal.
2. The knife-cutting test device according to claim 1, characterized in that, The knife-cutting test device also includes: A guide assembly (140) is disposed inside the housing (110), and the movable plate (160) is connected to the guide assembly (140) and is capable of moving along the third direction (Z).
3. The knife-cutting test device according to claim 2, characterized in that, The guide assembly (140) includes: At least one guide post (141) is disposed inside the housing (110) along the third direction (Z), and the guide post (141) is slidably provided with a bushing (142), and the movable plate (160) is connected to the bushing (142).
4. The knife-cutting test device according to claim 1, characterized in that, The blade (170) is detachably connected to the movable plate (160), and the angle between the plane where the blade (170) is located and the plane where the movable plate (160) is located is 0 to 180°.
5. The knife-cutting test device according to claim 1, characterized in that, The continuously variable speed cylinders (130) are two in number and are arranged opposite to each other in the second direction (Y).
6. The knife-cutting test device according to claim 1, characterized in that, The housing (110) has a clearance groove (111) at the end away from the continuously variable speed cylinder (130), and the clearance groove (111) corresponds to the blade (170) in the third direction (Z).
7. The knife-cutting test device according to claim 1, characterized in that, One end of the door (120) is rotatably connected to the box body (110), and the other end is provided with a door latch (121). The door latch (121) is fastened to the box body (110) so that the box body (110) forms a sealed space.
8. The knife-cutting test device according to claim 1, characterized in that, The box door (120) has an observation window (122).
9. The knife-cutting test device according to claim 1, characterized in that, The clamp (180) includes clamping plates (181) arranged opposite each other in the second direction (Y), and the clamping plates (181) have elongated slots (182) extending along the second direction (Y).
10. The knife-cutting test device according to claim 1, characterized in that, The knife-cutting test device (100) also includes a fire extinguishing nozzle (150), which is located inside the housing (110) and is configured to spray a fire extinguishing medium when the battery cell (200) catches fire.