Battery cell hardness testing device

Abstract

The utility model provides a battery cell hardness detection device, which relates to the technical field of battery cell measurement. The battery cell hardness detection device includes a test base, a support frame and a test piece. A clamping groove for clamping the battery cell is formed between the first support plate and the second support plate; the support frame is arranged between the two side support plates, and a lifting member is arranged on the support frame. The test piece is arranged at the lower end of the lifting member, and the lifting member makes the test piece abut against the battery cell to be tested and makes the test piece descend a fixed distance. The battery cell to be tested can be placed on the test base of the battery cell hardness detection device provided by the utility model, and the first support plate and the second support plate cooperate so that the two ends of the battery cell to be tested will not bend; the lifting member makes the test piece descend a specified distance, and measures the bending degree of the battery cell to be tested through the test piece, and then measures the hardness and softness of the battery cell. This process reduces human participation and the measurement result is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core measurement, in particular to a battery core hardness detection device. Background Art

[0002] Customers have certain requirements for the hardness of the battery cells. Different main materials and different injection volumes will lead to differences in the hardness of the battery cells. The residual gas inside the battery cells will cause the battery to become soft, which will affect the life of the battery cells. Too much electrolyte will cause the battery cells to become soft, which will affect the gripping and transplanting during the production process, and in severe cases will lead to scrapping.

[0003] In the subsequent battery cell grouping process, the robot is prone to drop or collision when grabbing and translating soft batteries, which may cause the batteries to ignite and cause safety accidents. Soft or hard batteries may miss abnormal batteries or cause inconvenience to assembly. Therefore, it is necessary to ensure a reasonable softness and hardness range for the batteries.

[0004] In the prior art, the hardness of the battery cell is felt by manually folding the battery cell back and forth, but human perception is always wrong and different people have different perceptions, and the standards are not unified. Utility Model Content

[0005] The utility model aims to provide a battery core hardness detection device to alleviate the technical problem of manual detection of battery core hardness and non-uniform standards.

[0006] The utility model provides a battery core hardness detection device, comprising a test base, a support frame and a test piece, wherein the test base is provided with two side support plates arranged opposite to each other, a first support plate and a second support plate are arranged along the height direction of the side support plates, and a clamping groove for clamping the battery core is formed between the first support plate and the second support plate;

[0007] The clamping grooves of the two side support plates are arranged opposite to each other, and the two clamping grooves cooperate to clamp at two ends of the battery cell to fix the battery cell, and a test area is formed between the two clamping grooves;

[0008] The support frame is arranged between the two side support plates, a lifting member is arranged on the support frame, the test piece is arranged at the lower end of the lifting member, and the lifting member makes the test piece abut against the battery cell to be tested and makes the test piece descend a fixed distance.

[0009] In an optional embodiment, the support frame is provided with a guide rail arranged in the height direction, the lifting member is arranged at the upper end of the support frame, and a driving screw connected to the lifting member is arranged at the lower end of the lifting member;

[0010] The test piece is provided with a connection block, which is screwed on the driving screw and slidably connected to the guide rail.

[0011] In an optional embodiment, the lifting member is a servo motor.

[0012] In an optional embodiment, the test piece includes a test housing, a test probe and a connection block;

[0013] One end of the connecting block is connected to the test housing, and the other end is screwed onto the driving screw;

[0014] A test cavity is arranged in the test housing, and an upper clamp ring and a lower clamp ring are arranged in the test cavity;

[0015] The test probe comprises a probe body and a telescopic rod, wherein the telescopic rod is arranged at the upper end of the probe body and can be telescoped relative to the probe body;

[0016] An upper clamping ring and a lower clamping ring are sleeved on the telescopic rod, and the upper clamping ring is fixed on the telescopic rod, and the lower clamping ring is slidably arranged on the telescopic rod.

[0017] In an optional embodiment, a return spring is sleeved on the telescopic rod, and the return spring keeps the lower clamping ring in contact with the probe body.

[0018] In an optional embodiment, the upper clamping ring, the lower clamping ring and the telescopic rod are all made of conductive metal.

[0019] In an optional embodiment, a display screen is further included, and the display screen is arranged on the test housing.

[0020] In an optional embodiment, a plurality of assembly grooves are provided on the side support plate along the height direction of the side support plate, and the first support plate and / or the second support plate are assembled in the assembly grooves.

[0021] The battery cell to be tested can be placed on the test base of the battery cell hardness detection device provided by the utility model, and the first support plate and the second support plate cooperate to prevent the two ends of the battery cell to be tested from bending; the lifting member causes the test member to descend a specified distance, and the bending degree of the battery cell to be tested is measured by the test member, thereby measuring the hardness of the battery cell. This process reduces human participation and the measurement result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a battery core hardness detection device provided by an embodiment of the utility model;

[0024] Figure 2 for Figure 1 A schematic structural diagram of the battery cell hardness detection device from another angle shown;

[0025] Figure 3 for Figure 1 The structural schematic diagram of the test probe of the battery cell hardness detection device is shown.

[0026] Icons: 100-test base; 200-side support plate; 300-first support plate; 400-second support plate; 500-clamping groove; 600-test area; 700-support frame; 800-drive screw; 900-lifting member; 110-connecting block; 120-test housing; 130-display screen; 140-test probe; 141-probe body; 142-telescopic rod; 150-reset spring; 160-upper retaining ring; 170-lower retaining ring. DETAILED DESCRIPTION

[0027] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the products of the present application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0030] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0031] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings.

[0032] Reference Figure 1-Figure 3 The utility model provides a battery cell hardness detection device, comprising a test base 100, a support frame 700 and a test piece, wherein the test base 100 is provided with two side support plates 200 arranged opposite to each other, a first support plate 300 and a second support plate 400 are arranged along the height direction of the side support plate 200, and a clamping groove 500 for clamping the battery cell is formed between the first support plate 300 and the second support plate 400;

[0033] The clamping grooves 500 of the two side support plates 200 are arranged opposite to each other, and the two clamping grooves 500 cooperate to clamp at both ends of the battery cell to fix the battery cell, and a test area 600 is formed between the two clamping grooves 500;

[0034] The support frame 700 is disposed between the two side support plates 200 , and a lifting member 900 is disposed on the support frame 700 . The test piece is disposed at the lower end of the lifting member 900 . The lifting member 900 enables the test piece to abut against the battery cell to be tested and to descend the test piece by a fixed distance.

[0035] In some embodiments, a side support plate 200 is respectively provided on both sides of the test base 100 of the battery cell hardness detection device, and a first support plate 300 and a second support plate 400 are provided on the side support plate 200. The first support plate 300 and the second support plate 400 form a clamping groove 500, and a clamping groove 500 is respectively provided on the two side support plates 200.

[0036] The two ends of the battery cell to be tested are respectively inserted into a clamping groove 500 , and the clamping groove 500 can ensure that when the battery cell to be tested is pressurized, the two ends of the battery cell to be tested remain horizontal to avoid affecting the measurement result.

[0037] There is a certain interval between the two clamping grooves 500 and forms a test area 600. The support frame 700 is set between the two side support plates 200. The lifting member 900 set on the support frame 700 can lift the test piece; when testing battery cells of the same specification, the lifting member 900 makes the test piece descend at the same height, and the test piece abuts against the battery cell and bends the battery cell.

[0038] For battery cells of the same specification, the test piece is raised or lowered to a fixed height. The degree of bending of the battery cell, that is, the hardness or softness of the battery cell, is determined based on the expansion and contraction of the test piece. The harder the battery cell, the more the test piece shrinks, and the softer the battery cell, the less the test piece shrinks.

[0039] In an optional embodiment, the support frame 700 is provided with a guide rail in the height direction, the lifting member 900 is provided at the upper end of the support frame 700, and a driving screw 800 connected to the lifting member 900 is provided at the lower end of the lifting member 900;

[0040] The test piece is provided with a connection block 110 , which is screwed onto the drive screw 800 and slidably connected to the guide rail.

[0041] In an optional implementation, the lifting member 900 is a servo motor.

[0042] In some embodiments, the lifting member 900 generally adopts a servo motor, and the lifting member 900 causes the driving screw 800 to rotate. The connecting block 110 is screwed on the driving screw 800, and the connecting block 110 is slidingly connected to the guide rail, that is, the connecting block 110 cannot rotate, so that the connecting block 110 can be lifted and lowered, even if the test piece is lifted and lowered.

[0043] The guide rail can guide the connection block 110 to move and prevent the connection block 110 from rotating.

[0044] Reference Figure 3 , in an optional embodiment, the test piece includes a test housing 120 , a test probe 140 and a connection block 110 ;

[0045] One end of the connecting block 110 is connected to the test housing 120, and the other end is screwed onto the driving screw 800;

[0046] A test cavity is provided in the test housing 120, and an upper clamp ring 160 and a lower clamp ring 170 are provided in the test cavity; the test probe 140 includes a probe body 141 and a telescopic rod 142, and the telescopic rod 142 is provided at the upper end of the probe body 141 and can be telescopic relative to the probe body 141;

[0047] An upper snap ring 160 and a lower snap ring 170 are sleeved on the telescopic rod 142 , and the upper snap ring 160 is fixed on the telescopic rod 142 , and the lower snap ring 170 is slidably disposed on the telescopic rod 142 .

[0048] In an optional embodiment, a return spring 150 is sleeved on the telescopic rod 142 , and the return spring 150 keeps the lower retaining ring 170 in contact with the probe body 141 .

[0049] A test cavity is provided in the test shell 120 of the test piece, and an upper clamping ring 160 and a lower clamping ring 170 are provided in the test cavity. One end of the telescopic rod 142 on the probe body 141 is fixedly connected to the upper clamping ring 160, that is, the telescopic rod 142 remains fixed and does not move, and the upper clamping ring 160 and the telescopic rod 142 remain relatively fixed.

[0050] The lower clamping ring 170 is sleeved on the telescopic rod 142. When the telescopic rod 142 and the probe body 141 move relative to each other, that is, the probe body 141 moves toward the telescopic rod 142, and the telescopic rod 142 retracts into the probe body 141, the lower clamping ring 170 moves toward the upper clamping ring 160, that is, the distance between the upper clamping ring 160 and the lower clamping ring 170 changes, and the telescopic rod 142 between the upper clamping ring 160, the lower clamping ring 170, and the upper clamping ring 160 and the lower clamping ring 170 are located in the same circuit; when the lower clamping ring 170 moves along the telescopic rod 142, the resistance in the circuit will change, resulting in a change in the current. According to the change in the current, after conversion, the length of the probe body 141 retracted into the test shell 120 is known, so as to measure the hardness of the battery cell, that is, the greater the current, the harder the battery cell, and the smaller the current, the softer the battery cell.

[0051] A return spring 150 is sleeved on the telescopic rod 142, wherein one end of the return spring 150 abuts against the lower retaining ring 170. When the lower retaining ring 170 retracts into the probe body 141 along with the telescopic rod 142, the probe body 141 causes the lower retaining ring 170 to move upward. When the telescopic rod 142 extends from the probe body 141, the return spring 150 causes the lower retaining ring 170 to remain in contact with the probe body 141, i.e., the lower retaining ring 170 moves in real time following the movement of the probe body 141, thereby causing the size of the resistance to change in real time following the movement of the probe body 141.

[0052] In an optional embodiment, the upper clamping ring 160 , the lower clamping ring 170 , and the telescopic rod 142 are all made of conductive metal.

[0053] In an optional embodiment, a display screen 130 is further included, and the display screen 130 is disposed on the test housing 120 .

[0054] In order to facilitate reading of the measurement result of the test piece, a display screen 130 is provided on the test housing 120 , and the measurement result of the test piece is displayed through the display screen 130 .

[0055] In an optional embodiment, a plurality of assembly grooves are provided on the side support plate 200 along the height direction of the side support plate 200 , and the first support plate 300 and / or the second support plate 400 are assembled in the assembly grooves.

[0056] Due to the different thicknesses of the battery cells, a clamping groove 500 matching the battery cells is required. A plurality of assembly grooves are provided on the side support plate 200. According to the different thicknesses of the battery cells, the height of the clamping groove 500 formed by the first support plate 300 and the second support plate 400 is changed by adjusting the positions of the first support plate 300 and the second support plate 400 so as to adapt to battery cells of different thicknesses. In this way, when the hardness of the battery cells is tested, the two ends of the battery cells will not be lifted up, thereby ensuring the accuracy of the test.

[0057] The battery cell to be tested can be placed on the test base 100 of the battery cell hardness detection device provided by the utility model, and the first support plate 300 and the second support plate 400 cooperate to prevent the two ends of the battery cell to be tested from bending; the lifting piece 900 lowers the test piece by a specified distance, and measures the bending degree of the battery cell to be tested through the test piece, thereby measuring the hardness of the battery cell. This process reduces human intervention and the measurement result is more accurate.

[0058] The battery cell hardness testing device can be used to test soft-pack batteries, wound batteries after hot pressing, etc., to unify the testing standards, quantify the softness and hardness of the battery, and provide a basis for on-site production and improvement.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery core hardness detection device, characterized in that: The invention comprises a test base (100), a support frame (700) and a test piece, wherein the test base (100) is provided with two side support plates (200) arranged opposite to each other, a first support plate (300) and a second support plate (400) are arranged along the height direction of the side support plates (200), and a clamping groove (500) for clamping a battery cell is formed between the first support plate (300) and the second support plate (400); The clamping grooves (500) of the two side support plates (200) are arranged opposite to each other, and the two clamping grooves (500) cooperate to clamp at two ends of the battery core to fix the battery core, and a test area (600) is formed between the two clamping grooves (500); The support frame (700) is arranged between the two side support plates (200), a lifting member (900) is arranged on the support frame (700), the test piece is arranged at the lower end of the lifting member (900), and the lifting member (900) makes the test piece abut against the battery cell to be tested and makes the test piece descend a fixed distance.

2. The battery core hardness detection device according to claim 1, characterized in that: The support frame (700) is provided with a guide rail arranged in a height direction, the lifting member (900) is arranged at the upper end of the support frame (700), and a driving screw rod (800) connected to the lifting member (900) is arranged at the lower end of the lifting member (900); The test piece is provided with a connection block (110), and the connection block (110) is screwed onto the driving screw rod (800) and is slidably connected to the guide rail.

3. The battery core hardness detection device according to claim 2, characterized in that: The lifting member (900) is a servo motor.

4. The battery core hardness detection device according to claim 2, characterized in that: The test piece comprises a test housing (120), a test probe (140) and a connection block (110); One end of the connection block (110) is connected to the test housing (120), and the other end is screwed onto the driving screw (800); A test cavity is arranged in the test housing (120), and an upper clamping ring (160) and a lower clamping ring (170) are arranged in the test cavity. The test probe (140) comprises a probe body (141) and a telescopic rod (142); the telescopic rod (142) is arranged at the upper end of the probe body (141) and can be telescoped relative to the probe body (141); An upper clamping ring (160) and a lower clamping ring (170) are sleeved on the telescopic rod (142), wherein the upper clamping ring (160) is fixed on the telescopic rod (142), and the lower clamping ring (170) is slidably arranged on the telescopic rod (142).

5. The battery core hardness detection device according to claim 4, characterized in that: The telescopic rod (142) is sleeved with a return spring (150), and the return spring (150) enables the lower clamping ring (170) to maintain contact with the probe body (141).

6. The battery core hardness detection device according to claim 4, characterized in that: The upper clamping ring (160), the lower clamping ring (170) and the telescopic rod (142) are all made of conductive metal.

7. The battery core hardness detection device according to claim 4, characterized in that: It also includes a display screen (130), wherein the display screen (130) is arranged on the test housing (120).

8. The battery core hardness detection device according to claim 1, characterized in that: A plurality of assembly grooves are provided on the side support plate (200) along the height direction of the side support plate (200), and the first support plate (300) and / or the second support plate (400) are assembled in the assembly grooves.

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