Expansion force testing tool for lithium battery

Abstract

The utility model discloses an expansive force testing tool for a lithium battery, which relates to the field of lithium battery expansive force testing and comprises a base, a lithium battery fixing mechanism, a height adjusting mechanism, a pressing seat and a testing mechanism. A lithium battery fixing mechanism is arranged on the base, and the pressing seat is arranged above the base in an up-down adjustable manner through the height adjusting mechanism; the testing mechanism comprises a movable plate, a pressure sensor and a pressing plate which are fixedly connected in sequence from top to bottom, and the movable plate can move left and right in the pressing seat. The lithium battery expansion force testing mechanism has the advantages that the lithium battery can be stably placed during expansion force testing, and the testing mechanism can be accurately pressed on the surface of the lithium battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lithium battery expansion force test, especially to a kind of expansion force test tool for lithium battery. BACKGROUND

[0002] Lithium battery expansion refers to the phenomenon that lithium battery is expanded due to the increase of internal pressure caused by the gas generated in the process of use, which may have negative effects on the performance and life of the battery and may cause safety hazards. In order to observe the change of expansion force during the lithium battery charge-discharge cycle test, it needs to be tested for more than 6 months, and there is currently a lack of tool for testing the durability of expansion force for various types of lithium batteries.

[0003] The patent document with publication number CN215262215U discloses an expansion force test tool for lithium battery, comprising: a base, a guide column connected upward, a support connected upward at the top of the guide column; a pressing plate slidingly arranged on the guide column; a top plate connected on the support by a locking screw; the lithium battery to be tested is clamped between the top plate and the pressing plate, and the pressing plate and the base clamp a pressure sensor.

[0004] The existing expansion force test tool for lithium battery lacks a structure for fixing the lithium battery, and the lithium battery cannot be stably placed during expansion force test. When the staff rotates the locking screw, the whole test tool will shake, which may easily cause the lithium battery to slide to the edge of the pressing plate or directly fall off. When testing the lithium battery that slides to the edge of the pressing plate, the expansion force test mechanism cannot accurately press on the surface of the lithium battery, resulting in large test data error; if the lithium battery directly falls off, it will not only damage the lithium battery but also increase the cost of lithium battery expansion force test. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is how to stably place the lithium battery during expansion force test and enable the test mechanism to accurately press on the surface of the lithium battery.

[0006] The utility model solves the above technical problems by the following technical means: an expansion force test tool for lithium battery, comprising a base, a lithium battery fixing mechanism, a height adjusting mechanism, a pressing seat and a test mechanism; the base is provided with a lithium battery fixing mechanism, the pressing seat is adjustably arranged above the base by the height adjusting mechanism; the test mechanism comprises a movable plate, a pressure sensor and a pressing plate fixedly connected in sequence from top to bottom, and the movable plate can move left and right in the pressing seat.

[0007] The tool fixes the lithium battery through the lithium battery fixing mechanism, realizes stable placement of the lithium battery during swelling force testing, avoids damage of the lithium battery caused by falling, and reduces the cost of swelling force testing of the lithium battery; the position of the testing mechanism can be adjusted by sliding the testing mechanism in the second installation cavity, so that the testing mechanism can be accurately pressed on the surface of the lithium battery.

[0008] As an optimized technical solution, the lithium battery fixing mechanism comprises a placing frame fixedly connected to the top surface of the base, a clamping plate capable of moving forward and backward in the placing frame, and a push block capable of moving left and right in the placing frame, and the placing frame, the clamping plate, and the push block define an adjustable space.

[0009] The lithium battery can be fixed in the horizontal and vertical directions, and the fixing is firm and can adapt to lithium batteries of various length and width sizes.

[0010] As an optimized technical solution, the mechanism for moving the push block left and right comprises a first threaded rod, a first rotating shaft, the push block, and a first handle; one side of the placing frame is provided with a threaded pipe, the first threaded rod is threadedly connected with the threaded pipe; the push block is rotationally connected with one end of the first threaded rod located in the placing frame through the first rotating shaft, and the first handle is fixedly connected to the other end of the first threaded rod located outside the placing frame.

[0011] Rotating the first handle can move the first threaded rod in the threaded pipe, thereby moving the push block; when the push block moves toward the side of the placing frame opposite to the threaded pipe, the push block can push the lithium battery to the inner wall of the placing frame to fix the lithium battery in the left-right direction, which is convenient to operate.

[0012] As an optimized technical solution, the mechanism for moving the clamping plate forward and backward comprises a forward-reverse motor, a bidirectional threaded column, a connecting shaft, a sliding plate, and a threaded ring; the output end of the forward-reverse motor is fixedly connected with one end of the bidirectional threaded column, the other end of the bidirectional threaded column is fixedly connected with the connecting shaft, and the connecting shaft is rotationally connected with the base; two groups of sliding plates are arranged at the front and rear threaded positions of the bidirectional threaded column, the sliding plate is fixedly connected with the threaded ring, the threaded ring is threadedly connected with the bidirectional threaded column, and the sliding plate is provided with the clamping plate.

[0013] When the forward-reverse motor drives the bidirectional threaded column to rotate, the two groups of sliding plates push the two groups of clamping plates to move relatively or oppositely, and the two groups of clamping plates can fix the lithium battery in the front-rear direction when moving relatively, which is simple in structure and reliable in operation.

[0014] As the optimized technical scheme, the inside of the base is provided with a first mounting cavity, and the sliding plate is slidingly matched in the first mounting cavity; the top of the base is provided with a sliding groove frame communicating with the first mounting cavity, the bottom of the clamping plate is fixedly connected with the top of the sliding plate through a sliding block, and the sliding block is slidingly matched in the sliding groove frame.

[0015] The double sliding matching ensures the stable movement of the clamping plate.

[0016] As the optimized technical scheme, a wire passing pipe is arranged on one side of the placing frame.

[0017] The wire passing pipe can be used to connect the external wire with the lithium battery.

[0018] As the optimized technical scheme, the height adjusting mechanism comprises a backing plate, a limiting sliding rod, a second threaded rod, a second rotating shaft, a second rotating handle and a top plate; the backing plate is fixedly connected to one side of the base, and the limiting sliding rod is fixedly connected to the backing plate; the second threaded rod is rotatably connected to the backing plate through the second rotating shaft, and the second threaded rod is fixedly connected with the second rotating handle; the top plate is slidingly matched with the limiting sliding rod and is threadedly connected with the second threaded rod, and the pressing seat is fixedly connected to the top plate.

[0019] The manual rotation of the second rotating handle can drive the top plate to move up and down, so as to drive the pressing seat to move up and down; when the pressing seat moves downward, the testing mechanism can be pressed on the upper surface of the lithium battery, and the limiting sliding rod can limit the movement range of the top plate.

[0020] As the optimized technical scheme, the inside of the pressing seat is provided with a second mounting cavity, and the movable plate is slidingly matched in the second mounting cavity; the bottom of the pressing seat is provided with a second sliding groove communicating with the second mounting cavity, and the pressing plate is slidingly matched in the second sliding groove.

[0021] The double sliding matching ensures the stable movement of the testing mechanism.

[0022] As the optimized technical scheme, the outside of the pressing seat is provided with a display, and the pressure sensor is electrically connected with the display.

[0023] The display can display the detected pressure value, so as to facilitate the staff to record and compare the detection data.

[0024] As the optimized technical scheme, the position adjusting mechanism comprises a push-pull rod and a push-pull block, the push-pull rod penetrates through the pressing seat and is fixedly connected with the movable plate, and the push-pull block is fixedly connected with one end of the push-pull rod located outside the pressing seat.

[0025] Holding the push-pull block allows the testing mechanism to move within the pressure seat, moving the pressing plate directly above the lithium battery, thus accurately pressing it onto the upper surface of the lithium battery, making operation convenient. Attached Figure Description

[0026] Figure 1 This is an isometric schematic diagram of the expansion force testing fixture for lithium batteries according to an embodiment of the present invention.

[0027] Figure 2 This is a front view schematic diagram of an embodiment of the present invention for testing the expansion force of lithium batteries.

[0028] Figure 3 This is a front-view cross-sectional view of a fixture for testing the expansion force of lithium batteries according to an embodiment of this utility model.

[0029] Figure 4 This invention relates to a fixture for testing the expansion force of lithium batteries. Figure 3 A magnified view of a portion of region A in the middle.

[0030] Figure 5 This invention relates to a fixture for testing the expansion force of lithium batteries. Figure 3 A magnified view of a portion of region B in the middle.

[0031] Figure 6 This is a rear view schematic diagram of the expansion force testing fixture for lithium batteries according to an embodiment of the present invention.

[0032] Figure 7 This is a right-view cross-sectional view of the bidirectional threaded column and shaft according to an embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] like Figures 1 to 7 As shown in the figure, this utility model embodiment discloses an expansion force testing fixture for lithium batteries, including a base 1, a lithium battery fixing mechanism 2, a height adjustment mechanism 3, a pressure seat 4, a testing mechanism 5, and a position adjustment mechanism 6.

[0035] A lithium battery fixing mechanism 2 is provided on the base 1. The pressure seat 4 is adjustable up and down above the base 1 through the height adjustment mechanism 3. The testing mechanism 5 is set on the pressure seat 4 and its planar position can be adjusted through the position adjustment mechanism 6.

[0036] The base 1 includes a housing 101, a front plate 102, a rear plate 103, and a sliding frame 104. The housing 101 has a first mounting cavity extending through its front and rear ends. The front plate 102 and the rear plate 103 respectively close the front and rear openings of the first mounting cavity. The top of the housing 101 has a first sliding groove. The inner sidewall of the first sliding groove is fixedly connected to the sliding frame 104. The sliding frame 104 communicates with the first mounting cavity and its top surface is at the same level as the top surface of the housing 101.

[0037] The lithium battery fixing mechanism 2 includes a forward and reverse motor 201, a bidirectional threaded column 202, a connecting shaft 203, a sliding plate 204, a threaded ring 205, a slider 206, a clamping plate 207, a first threaded rod 208, a first rotating shaft 209, a push block 210, a first rotating handle 211, a placement frame 212, a threaded tube 213, and a through tube 214.

[0038] A forward and reverse motor 201 is fixedly mounted on the front plate 102. A bidirectional threaded post 202 is disposed in the first mounting cavity. The output end of the forward and reverse motor 201 is fixedly connected to one end of the bidirectional threaded post 202. The other end of the bidirectional threaded post 202 is fixedly connected to a connecting shaft 203. The connecting shaft 203 and the rotating post 202 pass through the rear plate 103. Two sets of sliding plates 204 are respectively disposed at the front and rear threaded positions of the bidirectional threaded post 202. The sliding plates 204 are slidably fitted in the first mounting cavity. A threaded ring 205 is fixedly connected to the sliding plate 204. The threaded ring 205 is threadedly connected to the bidirectional threaded post 202. A clamping plate 207 is mounted on the sliding plate 204. The bottom of the clamping plate 207 is fixedly connected to the top of the sliding plate 204 through a slider 206. The slider 206 is slidably fitted in the slide frame 104. A placement frame 212 is fixedly connected to the top surface of the placement shell 101. The clamping plate 207 can move back and forth within the placement frame 212.

[0039] A threaded tube 213 is provided through one of the left and right sides of the placement frame 212, and the first threaded rod 208 is threadedly connected to the threaded tube 213. The push block 210 is rotatably connected to the end of the first threaded rod 208 located inside the placement frame 212 through the first rotating shaft 209. The push block 210 can move left and right inside the placement frame 212. The first rotating handle 211 is fixedly connected to the end of the first threaded rod 208 located outside the placement frame 212.

[0040] The placement frame 212, clamping plate 207, and push block 210 define an adjustable space. When the forward and reverse motor 201 drives the bidirectional threaded column 202 to rotate, the two sets of sliding plates 204 push the two sets of clamping plates 207 to move relative to each other or in opposite directions. When the two sets of clamping plates 207 move relative to each other, they can fix the lithium battery in the front-back direction. By holding the first rotating handle 211 and rotating it, the first threaded rod 208 can move inside the threaded tube 213, thereby pushing the push block 210 to move. When the push block 210 moves toward the side of the placement frame 212 opposite to the threaded tube 213, the push block 210 can push the lithium battery to the inner wall of the placement frame 212 and fix the lithium battery in the left-right direction.

[0041] A through-hole pipe 214 is provided on the side of the placement frame 212 opposite to the threaded pipe 213, and the external wire can be connected to the lithium battery through the through-hole pipe 214.

[0042] The height adjustment mechanism 3 includes a pad 301, a limiting slide bar 302, a second threaded rod 303, a second rotating shaft 304, a second rotating handle 305, and a top plate 306. The pad 301 is fixedly connected to one side of the housing 101. The lower end of the limiting slide bar 302 is fixedly connected to the top of the pad 301. The top plate 306 slides with the limiting slide bar 302, and the movement range of the top plate 306 can be limited by the limiting slide bar 302. The lower end of the second threaded rod 303 is rotatably connected to the pad 301 through the second rotating shaft 304. The upper end of the second threaded rod 303 is fixedly connected to the second rotating handle 305. The top plate 306 is threadedly connected to the second threaded rod 303. The pressure seat 4 is fixedly connected to one side of the top plate 306. Manually rotating the second rotating handle 305 can move the top plate 306 up and down, thereby driving the pressure seat 4 to move up and down. When the pressure seat 4 moves downward, it can drive the testing mechanism 5 to press against the upper surface of the lithium battery.

[0043] The testing mechanism 5 includes a movable plate 501, a pressure sensor 502, and a pressing plate 503, which are fixedly connected from top to bottom. The pressure base 4 has a second mounting cavity extending through its front and rear ends, and the movable plate 501 is slidably fitted within the second mounting cavity. A second sliding groove communicating with the second mounting cavity is opened through the bottom of the pressure base 4, and the pressing plate 503 is slidably fitted within the second sliding groove. The movable plate 501 can move left and right within the pressure base 4. After the movable plate 501, carrying the pressure sensor 502 and the pressing plate 503, moves to directly above the lithium battery, the testing mechanism 5 can be moved downwards via the height adjustment mechanism 3. The pressing plate 503 presses and fixes the upper surface of the lithium battery, and the pressure sensor 502 detects the pressure generated by the expansion of the lithium battery. A display 505 is provided on the outside of the pressure base 4, and the display 505 is fixedly connected to the front end of the movable plate 501. The pressure sensor 502 is electrically connected to the display 505 via a data cable 504. The display 505 can display the detected pressure value, facilitating the recording and comparison of test data by the staff.

[0044] The position adjustment mechanism 6 includes push-pull rods 601 and push-pull blocks 602. The two sets of push-pull rods 601 pass through the pressure seat 4 from the left and right directions and are fixedly connected to the movable plate 501. The push-pull block 602 is fixedly connected to one end of the two sets of push-pull rods 601 located outside the pressure seat 4. By holding the push-pull block 602, the test mechanism 5 can be moved back and forth along the second slide groove, so that the pressing plate 503 is moved to the top of the lithium battery, thereby accurately pressing on the upper surface of the lithium battery.

[0045] Working principle: In use, first place the lithium battery in the middle of the top surface of the housing 101, and connect the external wiring to the lithium battery using the through-wire 214; then manually rotate the first handle 211 to move the push block 210 toward the side of the housing 212 where the through-wire 214 is located, pushing the lithium battery onto the inner wall of the housing 212 to fix the lithium battery in the left and right direction; then use the forward and reverse motor 201 to drive the two sets of clamps 207 to move in opposite directions to fix the lithium battery in the front and back direction; then hold the push-pull block 602 to move the test mechanism 5 along the second slide groove, moving the pressing plate 503 directly above the lithium battery; finally, manually rotate the second handle 305 to move the top plate 306 downward, thereby moving the pressure seat 4 downward, so that the pressing plate 503 accurately presses on the upper surface of the lithium battery, and the expansion force test of the lithium battery can be performed.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An expansion force test tooling for a lithium battery, characterized by: The utility model provides a lithium battery test device, including base, lithium battery fixing mechanism, height adjusting mechanism, pressure seat and test mechanism, be provided with lithium battery fixing mechanism on the base, the pressure seat is adjustably arranged above the base through height adjusting mechanism, test mechanism includes movable plate, pressure sensor and pressing plate that fixed connection in proper order from top to bottom, movable plate can move left and right in the pressure seat.

2. The bulging force test tool for a lithium battery according to claim 1, wherein: The lithium battery fixing mechanism includes a placement frame fixedly connected to the top surface of the base, a clamping plate capable of moving forward and backward in the placement frame, and a push block capable of moving left and right in the placement frame, the placement frame, the clamping plate, and the push block define an adjustable space.

3. The bulging force test tool for a lithium battery according to claim 2, wherein: The mechanism for pushing the push block to move left and right includes a first threaded rod, a first rotating shaft, the push block, and a first handle; one side of the placement frame is provided with a threaded tube, the first threaded rod is threadedly connected with the threaded tube; the push block is rotatably connected with one end of the first threaded rod located in the placement frame through the first rotating shaft, and the first handle is fixedly connected with the other end of the first threaded rod located outside the placement frame.

4. The bulging force test tool for a lithium battery according to claim 2, wherein: The mechanism for pushing the clamping plate to move forward and backward includes a reversible motor, a bidirectional threaded column, a connecting shaft, a sliding plate, and a threaded ring; the output end of the reversible motor is fixedly connected with one end of the bidirectional threaded column, the other end of the bidirectional threaded column is fixedly connected with the connecting shaft, the connecting shaft is rotatably connected with the base; two groups of sliding plates are respectively arranged at the front and rear threaded positions of the bidirectional threaded column, the sliding plates are fixedly connected with the threaded rings, the threaded rings are threadedly connected with the bidirectional threaded column, and the clamping plate is mounted on the sliding plates.

5. The bulging force test tool for a lithium battery according to claim 4, wherein: The inside of the base is provided with a first mounting cavity, and the sliding plate is slidingly fitted in the first mounting cavity; the top of the base is provided with a sliding groove frame communicating with the first mounting cavity, the bottom of the clamping plate is fixedly connected with the top of the sliding plate through a sliding block, and the sliding block is slidingly fitted in the sliding groove frame.

6. The bulging force test tool for a lithium battery according to claim 2, wherein: One side of the placement frame is provided with a wire passing tube.

7. The bulging force test tool for a lithium battery according to claim 1, wherein: The height adjusting mechanism includes a pad, a limiting sliding rod, a second threaded rod, a second rotating shaft, a second handle, and a top plate; the pad is fixedly connected with one side of the base, the limiting sliding rod is fixedly connected with the pad, the second threaded rod is rotatably connected with the pad through the second rotating shaft, and the second handle is fixedly connected with the second threaded rod; the top plate is slidingly fitted with the limiting sliding rod and is threadedly connected with the second threaded rod, and the pressure seat is fixedly connected with the top plate.

8. The bulging force test tool for a lithium battery according to claim 1, wherein: The inside of the pressure seat is provided with a second mounting cavity, and the movable plate is slidingly fitted in the second mounting cavity; the bottom of the pressure seat is provided with a second sliding groove communicating with the second mounting cavity, and the pressing plate is slidingly fitted in the second sliding groove.

9. The bulging force test tool for a lithium battery according to claim 1, wherein: The outside of the pressure seat is provided with a display, and the pressure sensor is electrically connected with the display.

10. The bulging force test tool for a lithium battery according to claim 1, wherein: The position adjusting mechanism includes a push-pull rod and a push-pull block, the push-pull rod penetrates through the pressure seat and is fixedly connected with the movable plate, and the push-pull block is fixedly connected with one end of the push-pull rod located outside the pressure seat.

Images