A heat-resistant insulation testing device for battery separator production

Abstract

The present invention belongs to the technical field of battery diaphragms, and in particular to a heat-resistant insulation detection device for battery diaphragm production. In view of the problem in the prior art that some changes in internal conductive properties that occur instantaneously when the battery diaphragm is heated are difficult to detect in time when testing, the following scheme is proposed, including a base with a cavity in a rectangular structure, a mounting hole in the middle of the upper surface of the base, and a detection box clamped in the mounting hole, and the front and rear inner walls of the detection box are respectively fixed with C-shaped steel slide rails with openings facing each other and parallel to each other, and a T-shaped slider is slidably connected to the slide groove near both ends of each C-shaped steel slide rail. When the present invention is used, when it is necessary to test the heat-resistant insulation of the diaphragm body, it is only necessary to clamp the diaphragm body with two heated clamping plates, and then slowly increase the temperature and continuously observe the changes in the ammeter and signal light to timely obtain the insulation performance of the diaphragm when various positions of the diaphragm body are heated.

Description

Technical Field

[0001] The present invention relates to the technical field of battery separators, and in particular to a heat-resistant insulation detection device for battery separator production. Background Art

[0002] A battery separator is a layer of diaphragm material between the positive and negative electrodes of a battery. It is a critical component of the battery, directly impacting its safety and cost. Its primary function is to isolate the positive and negative electrodes, preventing electrons from freely passing through the battery while allowing ions in the electrolyte to pass freely between the positive and negative electrodes. Battery separators are typically made from various chemical raw materials, such as polyethylene and polypropylene, which are melt-extruded to form a thin film that facilitates the next step.

[0003] After searching, the Chinese patent number CN201320758888.6 is a lithium battery diaphragm heat resistance testing device, which includes a heating device for simulating the internal state of the battery, a temperature control device for adjusting and controlling the temperature of the heating device, and a display device for displaying the temperature of the heating device. The temperature control device and the display device are respectively connected to the heating device, and the heating device is connected to an external power supply through a power cord. However, in the actual detection process, this heat resistance testing device only sticks the battery diaphragm on the surface of the heating panel for hot-melt heating and observes the deformation of its surface. If the internal structure of the battery diaphragm changes when heated, it will also lead to changes in the conductive insulation performance, and the appearance at this time may not necessarily have obvious changes. Therefore, a detection device is needed that can observe the changes in the insulation performance of the battery diaphragm under heating in real time. Summary of the Invention

[0004] In order to overcome the problem in the prior art that some changes in internal conductivity that occur instantaneously when the battery separator is heated are difficult to detect in time, the present invention provides a heat-resistant insulation detection device for battery separator production.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a heat-resistant insulation detection device for battery diaphragm production, comprising a base with a cavity in the middle of the upper surface of the base in the form of a rectangular parallelepiped structure, a mounting hole is opened in the middle of the upper surface of the base, and a detection box is clamped in the mounting hole, and the front and rear inner walls of the detection box are respectively fixed with C-shaped steel slide rails with openings facing each other and parallel to each other, and each C-shaped steel slide rail has a T-shaped slider slidably connected in the slide groove near both ends, and the two T-shaped sliders are rotatably connected with the same bidirectional screw, and a positioning plate ring is fixed near the middle of the groove bottom of the C-shaped steel slide rail, and the bidirectional screw passes through both sides of the positioning plate ring Annular retaining rings are fixed respectively, and a fixed block is fixed on the side of the two T-shaped sliders away from the bottom of the groove, and a bow-shaped pressure rod is fixed on the opposite side of the two fixed blocks, and the bow-shaped pressure rod is made of a material with a certain toughness, and both ends of the bow-shaped pressure rod are rotatably connected to a pressure plate, a rectangular entrance is opened in the middle of the upper surface of the detection box, and clamping plates are provided on both sides of the rectangular entrance close to the diaphragm body, and mounting grooves are opened on the opposite sides of the two clamping plates, and a heat-conducting rod is fixed to the bottom of the mounting groove, the two clamping plates are connected in series in the alarm circuit, and a signal light and an ammeter are also connected in series in the alarm circuit.

[0006] As a preferred solution in the present invention, one end of the bidirectional screw rod 1 passes through the side wall of the detection box and is fixed with a toggle rod, and the end of the toggle rod away from the bidirectional screw rod 1 is fixed with a spring pin rod.

[0007] As a preferred solution in the present invention, a hinge groove is formed on one side of the pressing plate away from the diaphragm body, and a shaft is rotatably connected in the hinge groove, and the shaft passes through both ends of the bow-shaped pressure rod.

[0008] As a preferred solution in the present invention, bosses are reserved on opposite sides of the two clamping plates, and a plurality of balls are embedded on the surfaces of the bosses.

[0009] As a preferred solution in the present invention, a telescopic rod is fixed to the middle of the upper surface of the base near the edge, and a carrier plate is fixed to the top of the extension rod of the telescopic rod, and a crossbeam rail with a downward opening is fixed to the top of the carrier plate, and sliding blocks are slidably connected to the sliding groove of the crossbeam rail near both sides.

[0010] As a preferred solution in the present invention, the lower surfaces of the two sliding blocks are respectively fixed with mutually symmetrical fixed boxes, and the middle of the two fixed boxes are slidably connected with inner sliding rods, and the opposite ends of the two inner sliding rods are fixed with mounting blocks, and the top of the clamping plate is fixed on the lower surface of the corresponding mounting block.

[0011] As a preferred solution in the present invention, guide rods are fixed to the lower surface of the carrier plate near both ends, and guide tubes matching the guide rods are fixed to the upper surface of the base near and just below the two guide rods.

[0012] As a preferred solution in the present invention, screw holes with opposite thread directions are respectively opened on opposite sides of the two sliding blocks, and the same bidirectional screw rod 2 is screwed into the two screw holes, and the end of the bidirectional screw rod 2 is fixed with a servo motor through a coupling.

[0013] As a preferred solution in the present invention, a plurality of clamps are clamped on the outer wall of the heat-conducting rod, and the height of the clamps is smaller than the depth of the installation groove, and an insulation board is clamped at the opening of the installation groove.

[0014] In summary, the beneficial effects of this solution are:

[0015] 1. This heat-resistant insulation testing device for battery diaphragm production has self-heating clamping plates on both sides of the diaphragm body, which are connected in series in the circuit. When the diaphragm body needs to be tested for heat resistance and insulation, it only needs to be clamped with two heated clamping plates, and then the temperature is slowly increased while continuously observing the changes in the ammeter and signal light. The insulation performance of the diaphragm can be determined in a timely manner when various positions of the diaphragm body are heated.

[0016] 2. This heat-resistant insulation testing device for battery diaphragm production is equipped with pressing plates connected to both ends of the bow-shaped pressure rod. When the bow-shaped pressure rods on both sides of the diaphragm drive the pressing plates to squeeze the diaphragm in the middle, it can not only tightly clamp the diaphragm body, but also have a certain degree of ductility for the diaphragm body, thereby avoiding detection errors caused by wrinkles in the diaphragm and improving detection accuracy.

[0017] 3. This heat-resistant insulation testing device for battery separator production has bosses on opposite sides of two clamping plates. This can prevent the clamping plates from accidentally contacting other parts of the separator due to micro-deformation during use, and can also ensure that the contact surface between the separator and the clamping plates is heated more evenly.

[0018] 4. This type of heat-resistant insulation testing device for battery diaphragm production, through the set telescopic rod and the ball on the boss surface, can drive the clamping plate to move up and down on the surface of the diaphragm body by the extension of the telescopic rod when in use, so as to change the testing position for comprehensive testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic cross-sectional view of a heat-resistant insulation testing device for battery separator production proposed by the present invention;

[0020] Figure 2 This is a partial cross-sectional structural diagram of a test box for a heat-resistant insulation test device for battery separator production proposed by the present invention;

[0021] Figure 3This is a schematic diagram of the assembly structure of a clamping plate of a heat-resistant insulation testing device for battery separator production proposed by the present invention;

[0022] Figure 4 A heat-resistant insulation testing device for battery separator production proposed by the present invention Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0023] In the figure: 1 base, 2 bidirectional screw rod 1, 3 detection box, 301 rectangular inlet, 4 clamping plate, 401 clamp, 5 pressure plate, 6 shaft rod, 7 bow pressure rod, 8 fixed block, 9 C-shaped steel slide rail, 10 T-shaped slider, 11 toggle rod, 12 spring pin rod, 13 mounting groove, 14 ball bearing, 15 heat conducting rod, 16 bidirectional screw rod 2, 17 fixed box, 1701 inner slide rod, 1702 signal light, 18 sliding block, 19 crossbeam rail, 20 telescopic rod, 21 guide tube. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0026] Example 1

[0027] Reference Figure 1-4A heat-resistant insulation testing device for battery separator production includes a base 1 with a cavity in the middle, a mounting hole in the middle of the upper surface of the base 1, and a test box 3 is clamped in the mounting hole. C-shaped steel slide rails 9 with openings facing each other and parallel to each other are fixed to the inner walls of the front and rear sides of the test box 3, and a T-shaped slider 10 is slidably connected to the slide groove of each C-shaped steel slide rail 9 near both ends. The two T-shaped sliders 10 are rotatably connected to the same bidirectional screw 2, and a positioning plate ring is fixed near the middle of the bottom of the groove of the C-shaped steel slide rail 9. The bidirectional screw 2 passes through the positioning plate ring and is fixed with annular retaining rings on both sides. A fixing block 8 is fixed to the side of the two T-shaped sliders 10 away from the bottom of the groove. , a bow-shaped pressure rod 7 is fixed on the opposite side of the two fixed blocks 8, and the bow-shaped pressure rod 7 is made of a material with a certain toughness. Both ends of the bow-shaped pressure rod 7 are rotatably connected to a pressure plate 5. A rectangular entrance 3 is opened in the middle of the upper surface of the detection box 3, and clamping plates 4 are provided on both sides of the rectangular entrance 3 close to the diaphragm body. The two clamping plates 4 are opened on the opposite side of the two clamping plates 4, and the bottom of the mounting groove 13 is fixed with a heat-conducting rod 15. The two clamping plates 4 are connected in series in the alarm circuit, and the alarm circuit is also connected in series with a signal light 1702 and an ammeter, so that when the diaphragm body needs to be tested for heat resistance and insulation during use, it is only necessary to clamp the diaphragm body with two heated clamping plates 4, and then slowly heat up and continuously observe the changes in the ammeter and the signal light 1702 to timely obtain the insulation performance of the diaphragm when various positions of the diaphragm body are heated.

[0028] In the present invention, one end of the bidirectional screw 2 passes through the side wall of the detection box 3 and is fixed with a toggle rod 11, and the end of the toggle rod 11 away from the bidirectional screw 2 is fixed with a spring pin rod 12, so that when it is necessary to control the two bow-shaped pressure rods 7 to move toward the middle to clamp the middle diaphragm body during use, it is only necessary to first pull out the spring pin rod 12 and then rotate the toggle rod 11. After the middle diaphragm body is clamped, it is only necessary to loosen the spring pin rod 12 in place, and the position of the bidirectional screw 2 can be locked at this time.

[0029] Among them, a hinge groove is opened on the side of the pressure plate 5 away from the diaphragm body, and a shaft rod 6 is rotatably connected in the hinge groove. The shaft rod 6 passes through the two ends of the bow-shaped pressure rod 7, so that when the bow-shaped pressure rods 7 on both sides of the diaphragm drive the pressure plate 5 to squeeze the middle diaphragm, it can not only tightly clamp the diaphragm body, but also have a certain ductility to the diaphragm body, thereby avoiding detection errors caused by wrinkles in the diaphragm and improving the accuracy of detection.

[0030] Among them, bosses are reserved on the opposite sides of the two clamping plates 4, and a number of balls are embedded on the surface of the bosses, so that during use, the clamping plates 4 can be prevented from accidentally contacting places other than the diaphragm due to micro-deformation, and the contact surface between the diaphragm and the clamping plate 4 can be heated more evenly.

[0031] Among them, a telescopic rod 20 is fixed to the middle of the upper surface of the base 1 near the edge, and a carrier plate is fixed to the top of the extension rod of the telescopic rod 20, and a downward-opening crossbeam rail 19 is fixed to the top of the carrier plate, and sliding blocks 18 are slidably connected to the sliding groove of the crossbeam rail 19 near both sides.

[0032] Among them, the lower surfaces of the two sliding blocks 18 are respectively fixed with mutually symmetrical fixed boxes 17, and the middle of the two fixed boxes 17 are slidably connected with inner sliding rods 1701, and the opposite ends of the two inner sliding rods 1701 are fixed with mounting blocks, and the top end of the clamping plate 4 is fixed on the lower surface of the corresponding mounting block, so that when in use, the telescopic rod 20 can be used to extend and retract the extension rod to drive the clamping plate 4 to move up and down on the surface of the diaphragm body to change the detection position for comprehensive detection.

[0033] The lower surface of the carrier plate is fixed with guide rods near both ends, and the upper surface of the base 1 is fixed with guide tubes 21 matching therewith just below the two guide rods.

[0034] The two sliding blocks 18 have screw holes with opposite thread directions on opposite sides, and the same bidirectional screw rod 16 is screwed into the two screw holes, and the end of the bidirectional screw rod 16 is fixed with a servo motor through a coupling.

[0035] Among them, several clamps 401 are clamped on the outer wall of the rod body of the heat-conducting rod, and the height of the clamps 401 is less than the depth of the mounting groove 13. An insulation plate is clamped at the opening of the mounting groove 13, so that heat dissipation can be effectively reduced during use and a large amount of heat energy can be transferred to the clamping plate 4.

[0036] Working principle: Before use, first reduce a length of the diaphragm body that is compatible with the distance between the clamping devices composed of two sets of bow-shaped pressure rods 7, then put the diaphragm body into the middle of the detection box 3, and then pull out the spring pin rod 12, rotate the toggle rod 11 to drive the bidirectional screw rod 2 to rotate, so as to control the two bow-shaped pressure rods 7 to move toward the middle to clamp the diaphragm body in the middle. After the diaphragm body in the middle is clamped, just loosen the spring pin rod 12 in place, and the position of the bidirectional screw rod 2 can be locked at this time; when the diaphragm body needs to be tested for heat resistance and insulation during use, it is only necessary to clamp the diaphragm body with two heated clamping plates 4, and then slowly increase the temperature and continuously observe the changes in the ammeter and signal light 1702 to timely obtain the insulation performance of the diaphragm when various positions of the diaphragm body are heated.

[0037] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A heat-resistant insulation detection device for battery diaphragm production, comprising a base (1) with a rectangular structure and a cavity therein, a mounting hole being opened in the middle of the upper surface of the base (1), and a detection box (3) being clamped in the mounting hole, and C-shaped steel slide rails (9) with openings facing each other and parallel to each other are fixed to the inner walls on the front and rear sides of the detection box (3), and a T-shaped slider (10) is slidably connected in the slide groove of each C-shaped steel slide rail (9) near both ends, and the two T-shaped sliders (10) in the same C-shaped steel slide rail (9) are rotatably connected with the same bidirectional screw rod (2), and a positioning plate ring is fixed near the middle of the groove bottom of the C-shaped steel slide rail (9), and an annular retaining ring is fixed on both sides of the bidirectional screw rod (2) passing through the positioning plate ring, and a fixing block (8) is fixed on the side away from the groove bottom of the two T-shaped sliders (10), characterized in that A bow-shaped pressure rod (7) is fixed on one side opposite to the two fixed blocks (8), and the bow-shaped pressure rod (7) is made of a material with a certain toughness. Both ends of the bow-shaped pressure rod (7) are rotatably connected to a pressure plate (5). A rectangular entrance (301) is opened in the middle of the upper surface of the detection box (3), and clamping plates (4) are provided on both sides of the rectangular entrance (301) close to the diaphragm body. A mounting groove (13) is opened on the opposite side of the two clamping plates (4), and a heat conducting rod (15) is fixed to the bottom of the mounting groove (13). The two clamping plates (4) are connected in series in the alarm circuit, and the alarm A signal lamp (1702) and an ammeter are also connected in series in the alarm circuit. A hinge groove is provided on the side of the pressing plate (5) away from the diaphragm body, and a shaft (6) is rotatably connected in the hinge groove. The shaft (6) passes through the two ends of the bow-shaped pressure rod (7). Bosses are reserved on the opposite sides of the two clamping plates (4), and a plurality of balls are embedded on the surface of the bosses. When in use, the two groups of bow-shaped pressure rods (7) on both sides of the diaphragm drive the pressing plate (5) to clamp the diaphragm to avoid detection errors caused by wrinkles on the diaphragm. The clamping plate (4) moves up and down on the surface of the diaphragm body to change the detection position for comprehensive detection.

2. A heat-resistant insulation testing device for battery separator production according to claim 1, characterized in that: One end of the bidirectional screw rod (2) passes through the side wall of the detection box (3) and is fixed with a toggle rod (11), and the end of the toggle rod (11) away from the bidirectional screw rod (2) is fixed with a spring pin rod (12).

3. A heat-resistant insulation testing device for battery separator production according to claim 1, characterized in that: A telescopic rod (20) is fixed to the middle of the upper surface of the base (1) near the edge, and a carrier plate is fixed to the top end of the extension rod of the telescopic rod (20), and a crossbeam rail (19) with a downward opening is fixed to the top end of the carrier plate, and sliding blocks (18) are slidably connected to both sides of the sliding groove of the crossbeam rail (19).

4. A heat-resistant insulation testing device for battery separator production according to claim 3, characterized in that: The lower surfaces of the two sliding blocks (18) are respectively fixed with mutually symmetrical fixed boxes (17), and the middle of the two fixed boxes (17) are slidably connected with inner sliding rods (1701), and the opposite ends of the two inner sliding rods (1701) are fixed with mounting blocks, and the top end of the clamping plate (4) is fixed to the lower surface of the corresponding mounting block.

5. A heat-resistant insulation testing device for battery separator production according to claim 4, characterized in that: The lower surface of the carrier plate is fixed with guide rods near both ends, and the upper surface of the base (1) is fixed with guide tubes (21) matching the guide rods just below the two guide rods.

6. A heat-resistant insulation testing device for battery separator production according to claim 4, characterized in that: The two sliding blocks (18) are provided with screw holes with opposite thread directions on opposite sides, and the same bidirectional screw rod 2 (16) is screwed into the two screw holes, and the end of the bidirectional screw rod 2 (16) is fixed with a servo motor through a coupling.

7. A heat-resistant insulation testing device for battery separator production according to claim 1, characterized in that: A plurality of clamps (401) are clamped on the outer wall of the heat-conducting rod, and the height of the clamps (401) is less than the depth of the installation groove (13). A heat insulating plate is clamped at the opening of the installation groove (13).

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