CN213749686U

CN213749686U - Device for measuring thermal shrinkage of battery diaphragm

Info

Publication number: CN213749686U
Application number: CN202023126901.5U
Authority: CN
Inventors: 王红兵; 徐�明; 边红兵; 杨招; 刘显军; 周振新
Original assignee: Xiangyang Huiqiang New Energy Material Technology Co ltd
Current assignee: Xiangyang Huiqiang New Energy Material Technology Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-07-20
Anticipated expiration: 2030-12-23

Abstract

The utility model discloses a battery diaphragm thermal contraction is device for measurement, including the outer container, outer container inner wall fixedly connected with inner box, the inner box inner wall is provided with the mount, the mount sets up to the U type, a plurality of springs of mount inner wall bottom fixedly connected with, spring top fixedly connected with bottom plate, the bottom plate top is provided with the roof. The utility model discloses a fixed slot that sets up roof and bottom plate and set up can make diaphragm top and bottom insert, press from both sides tight fixedly to the diaphragm through setting up second bolt control splint, it is fixed by spring coupling through setting up between bottom plate and the mount, thereby it is tensile to make the bottom plate have elasticity to the diaphragm, improve bottom plate and roof to the fixed security of diaphragm, heat the inside of inner box through setting up electric cabinet control heating pipe, can measure the measurement to the diaphragm that produces the shrink through the infrared distance meter that sets up mount one side outer wall, the purpose of measuring the thermal contraction of diaphragm has been realized.

Description

Device for measuring thermal shrinkage of battery diaphragm

Technical Field

The utility model relates to a measure and put technical field, especially relate to a battery diaphragm thermal contraction is device for measurement.

Background

In the structure of the lithium battery, a diaphragm is one of the key inner components, and the quality of the performance of the diaphragm directly influences the internal resistance, the discharge capacity, the cycle service life and the safety performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery and prevent the two electrodes from contacting and short-circuiting. However, the battery may have a high temperature rise due to long-term use or abnormal conditions, and at this time, if the separator is thermally shrunk due to the high temperature rise, the separator cannot effectively isolate the positive and negative electrodes, so that the separator is required to have good thermal stability. In order to detect the thermal stability of the separator, a method of detecting thermal shrinkage is generally used.

However, in the current thermal shrinkage detection, a lithium battery diaphragm sample is placed in an oven to be heated to a high temperature state, and the length change of the diaphragm before and after heating is measured by using a steel ruler, and the detection device mostly does not adopt a related fixing mechanism for the diaphragm, so that the diaphragm is easy to shift during detection to influence the detection result, and therefore, the research on the device for measuring the thermal shrinkage of the battery diaphragm with the stable fixing mechanism is necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a device for measuring thermal shrinkage of a battery diaphragm.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a device for measuring thermal contraction of a battery diaphragm comprises an outer box, wherein an inner box is fixedly connected to the inner wall of the outer box, a fixing frame is arranged on the inner wall of the inner box and is set to be U-shaped, a plurality of springs are fixedly connected to the bottom of the inner wall of the fixing frame, a bottom plate is fixedly connected to the top of the springs, a top plate is arranged at the top of the bottom plate, a plurality of first screw rods are rotatably connected to the top of the top plate and are in threaded connection with the outer wall of the top of the fixing frame, fixing grooves are formed in the outer walls of the top plate and the bottom plate, clamping plates are arranged on the inner wall of the fixing grooves, a plurality of second screw rods are rotatably connected to the outer walls of one sides of the top plate and the bottom plate, an infrared distance meter is arranged on one side of the bottom plate and is fixedly connected to the outer wall of one side of the fixing frame, and a plurality of heating pipes are arranged at one end of the fixing frame, the outer wall of one end of the outer box is fixedly connected with an electric cabinet, and the electric cabinet is electrically connected with the heating pipe.

Preferably, mount bottom fixedly connected with dwang, dwang bottom and inner box rotate to be connected, outer container top fixedly connected with motor, motor bottom and mount top fixed connection.

Preferably, an interlayer is arranged between the outer box and the inner box and is set to be vacuum.

Preferably, a wind scooper is arranged at one end of the fixing frame, the heating pipe is fixedly connected with the inner wall of the wind scooper, an air inlet box is fixedly connected with one end of the wind scooper, the air inlet box is fixedly connected with the inner box and the outer box, a fan is fixedly connected with the inner wall of the air inlet box, an air inlet plate is fixedly connected with the outer wall of one end of the outer box, and the air inlet plate is fixedly connected with the air inlet box.

Preferably, an activated carbon plate is arranged at one end, close to the air inlet plate, of the fan, and the activated carbon plate is fixedly connected with the inner wall of the air inlet box.

Preferably, the top of the inner wall of the inner box is fixedly connected with a sponge plate, and the inner wall of the sponge plate is fixedly connected with a plurality of honeycomb activated carbons.

Preferably, the fixing frame is provided with an air outlet cover at one end far away from the air guide cover, the air outlet cover is respectively fixedly connected with the inner box and the outer box, the heating pipe is fixedly connected with the inner wall of the air outlet cover, and the inner wall of one end of the air outlet cover is fixedly connected with the air outlet plate.

The utility model has the advantages that:

1. can make diaphragm top and bottom insert through the fixed slot that sets up roof and bottom plate and set up, press from both sides tight fixedly to the diaphragm through setting up second bolt control splint, it is fixed by spring coupling between through setting up bottom plate and the mount, thereby make the bottom plate have elastic stretch to the diaphragm, improve the security that bottom plate and roof are fixed to the diaphragm, heat the inside of inner box through setting up electric cabinet control heating pipe, thereby the diaphragm between bottom plate and the roof is heated, can measure the measurement to the diaphragm that produces the shrink through the infrared distance meter that sets up mount one side outer wall, the purpose of measuring the thermal contraction of diaphragm has been realized.

2. The motor and the fixing frame are fixedly connected, the bottom of the fixing frame is rotatably connected with the inner box through the rotating rod, so that the fixing frame has rotating capacity, the air inlet box arranged at one end of the fixing frame utilizes the fan to extract air flow from the outside and dry the membrane in the rotating fixing frame after the drying treatment of the activated carbon plate and the heating treatment of the heating pipe, and the influence of the surface humidity of the membrane on the thermal shrinkage measurement precision is avoided.

3. The air-out cover that goes out through setting up mount one end can blow the air current that the wind scooper comes and carry out exhaust treatment, improves the air current circulation to the drying power who improves, the board of giving vent to anger of going out the inside of fan housing can play and keep apart the filtration side effect, avoids external impurity to enter into the inner box inside.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a device for measuring thermal shrinkage of a battery separator according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a main body of a fixing frame of the device for measuring thermal shrinkage of a battery diaphragm according to the present invention;

fig. 3 is a schematic view of a partial cross-sectional structure of a device for measuring thermal shrinkage of a battery separator according to embodiment 2 of the present invention.

In the figure: the device comprises an outer box 1, an air inlet box 2, an activated carbon plate 3, an air inlet plate 4, a fan 5, a heating pipe 6, an electric control box 7, an air guide cover 8, a fixing frame 9, a rotating rod 10, a spring 11, an infrared distance meter 12, a bottom plate 13, an air outlet plate 14, an air outlet cover 15, a first screw rod 16, a top plate 17, a motor 18, an inner box 19, an interlayer 20, a second screw rod 21, a fixed groove 22, a clamping plate 23, honeycomb activated carbon 24 and a sponge plate 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

Referring to fig. 1-2, a device for measuring thermal contraction of a battery diaphragm comprises an outer box 1, an inner box 19 is fixedly connected to the inner wall of the outer box 1, a fixing frame 9 is arranged on the inner wall of the inner box 19, the fixing frame 9 is set to be U-shaped, a plurality of springs 11 are fixedly connected to the bottom of the inner wall of the fixing frame 9, a bottom plate 13 is fixedly connected to the top of the springs 11, a top plate 17 is arranged on the top of the bottom plate 13, a plurality of first screw rods 16 are rotatably connected to the top of the top plate 17, the first screw rods 16 are in threaded connection with the outer wall of the top of the fixing frame 9, fixing grooves 22 are formed in the outer walls of the top plate 17 and the bottom plate 13, a clamping plate 23 is arranged on the inner wall of the fixing groove 22, a plurality of second screw rods 21 are in threaded connection with the outer wall of one side of the top plate 17 and the bottom plate 13, the second screw rods 21 are rotatably connected with the clamping plate 23, an infrared distance meter 12 is arranged on one side of the infrared distance meter 12 and the outer wall of the fixing frame 9, a plurality of heating pipes 6 are arranged at one end of the fixing frame 9, outer wall fixedly connected with electric cabinet 7 of 1 one end of outer container,

electric cabinet

7 and 6 electric connection of heating pipe, fixed slot 22 through setting up roof 17 and bottom plate 13 and seting up can make diaphragm top and bottom insert, it is fixed to press from both sides tightly the diaphragm through setting up second bolt 21 control splint 23, it is fixed to connect by spring 11 between bottom plate 13 and the mount 9 through setting up, thereby it has elastic stretching to the diaphragm to make bottom plate 13, improve bottom plate 13 and roof 17 and to the fixed security of diaphragm, heat inside inner box 19 through setting up electric cabinet 7 control heating pipe 6, thereby it heats to the diaphragm between bottom plate 13 and the roof 17, can measure the diaphragm that produces the shrink through infrared distance meter 12 who sets up mount 9 one side outer wall, realized measuring purpose to diaphragm thermal contraction.

In the utility model, the bottom of the fixing frame 9 is fixedly connected with a rotating rod 10, the bottom of the rotating rod 10 is rotatably connected with an inner box 19, the top of an outer box 1 is fixedly connected with a motor 18, the bottom of the motor 18 is fixedly connected with the top of the fixing frame 9, one end of the fixing frame 9 is provided with a wind scooper 8, a heating pipe 6 is fixedly connected with the inner wall of the wind scooper 8, one end of the wind scooper 8 is fixedly connected with an air inlet box 2, the air inlet box 2 is fixedly connected with the inner box 19 and the outer box 1, the inner wall of the air inlet box 2 is fixedly connected with a fan 5, the outer wall of one end of the outer box 1 is fixedly connected with an air inlet plate 4, the air inlet plate 4 is fixedly connected with the air inlet box 2, one end of the fan 5, which is close to the air inlet plate 4, the activated carbon plate 3 is fixedly connected with the inner wall of the air inlet box 2 by arranging the motor 18 and the fixing frame 9, and the bottom of the fixing frame 9 is rotatably connected with the rotating rod 10 and the inner box 19, thereby enabling the fixing frame 9 to have the rotating capability, the air inlet box 2 arranged at one end of the fixing frame 9 is used for extracting air flow from the outside by using the fan 5, and drying the diaphragm in the rotating fixing frame 9 after drying treatment of the activated carbon plate 3 and heating treatment of the heating pipe 6, so that the influence of humidity on the surface of the diaphragm on the thermal shrinkage measurement precision is avoided;

an interlayer 20 is arranged between the outer box 1 and the inner box 19, and the interlayer 20 is arranged to improve the heat preservation and insulation capacity of the device in vacuum;

19 inner wall top fixedly connected with sponge board 25 of inner box, a plurality of honeycomb active carbon 24 of sponge board 25 inner wall fixedly connected with in time absorb the steam that produces after the drying process.

The working principle is as follows: in the idle position of the device, all the components are referred to as structural members to be connected, the specific connecting means refers to the following working principle that the components are connected in sequence, the detailed connecting means is the known technology in the field, the following main description of the working principle and the process is omitted, when the device is used, the top and the bottom of the diaphragm can be inserted through the fixing grooves 22 formed in the top plate 17 and the bottom plate 13, the diaphragm is clamped and fixed through the second bolt 21 and the clamping plate 23, the bottom plate 13 and the fixing frame 9 are connected and fixed through the spring 11, so that the bottom plate 13 has elastic stretching on the diaphragm, the safety of the bottom plate 13 and the top plate 17 on the diaphragm is improved, the electric control box 7 is arranged to control the heating pipe 6 to heat the inside of the inner box 19, so that the diaphragm between the bottom plate 13 and the top plate 17 is heated, the diaphragm which generates shrinkage can be measured by the infrared distance meter 12 arranged on the outer wall of one side of the fixing frame 9, and the purpose of measuring the thermal shrinkage of the diaphragm is realized.

Example 2

Referring to fig. 3, a device for measuring thermal shrinkage of a battery diaphragm is characterized in that an air outlet cover 15 is arranged at one end, far away from an air guide cover 8, of a fixing frame 9, the air outlet cover 15 is fixedly connected with an inner box 19 and an outer box 1 respectively, a heating pipe 6 is fixedly connected with the inner wall of the air outlet cover 15, and an air outlet plate 14 is fixedly connected with the inner wall of one end of the air outlet cover 15.

The working principle is as follows: the air outlet cover 15 arranged at one end of the fixing frame 9 can perform exhaust treatment on air flow blown by the air guide cover 8, so that air flow circulation is improved, drying capacity is improved, the air outlet plate 14 inside the air outlet cover 15 can play a role in isolating and filtering the side, and external impurities are prevented from entering the inner box 19.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. The device for measuring the thermal contraction of the battery diaphragm comprises an outer box (1) and is characterized in that the inner wall of the outer box (1) is fixedly connected with an inner box (19), the inner wall of the inner box (19) is provided with a fixing frame (9), the fixing frame (9) is set to be in a U shape, the bottom of the inner wall of the fixing frame (9) is fixedly connected with a plurality of springs (11), the top of each spring (11) is fixedly connected with a bottom plate (13), the top of each bottom plate (13) is provided with a top plate (17), the top of each top plate (17) is rotatably connected with a plurality of first screw rods (16), the first screw rods (16) are in threaded connection with the outer wall of the top of the fixing frame (9), the outer walls of the top plates (17) and the bottom plates (13) are respectively provided with a fixing groove (22), the inner walls of the fixing grooves (22) are provided with clamping plates (23), the outer walls of one sides of the top plates (17) and the bottom plates (13) are in threaded connection with a plurality of second screw rods (21), second screw rod (21) and splint (23) rotate to be connected, bottom plate (13) one side is provided with infrared distance meter (12), infrared distance meter (12) and mount (9) one side outer wall fixed connection, mount (9) one end is provided with a plurality of heating pipes (6), outer container (1) one end outer wall fixed connection has electric cabinet (7), electric cabinet (7) and heating pipe (6) electric connection.

2. The device for measuring the thermal shrinkage of the battery diaphragm according to claim 1, wherein a rotating rod (10) is fixedly connected to the bottom of the fixing frame (9), the bottom of the rotating rod (10) is rotatably connected with the inner box (19), a motor (18) is fixedly connected to the top of the outer box (1), and the bottom of the motor (18) is fixedly connected with the top of the fixing frame (9).

3. The device for measuring thermal shrinkage of a battery separator according to claim 1, wherein an interlayer (20) is provided between the outer case (1) and the inner case (19), and the interlayer (20) is provided in a vacuum.

4. The device for measuring the thermal contraction of the battery diaphragm according to claim 1 or 2, wherein a wind scooper (8) is arranged at one end of the fixing frame (9), the heating pipe (6) is fixedly connected with the inner wall of the wind scooper (8), an air inlet box (2) is fixedly connected with one end of the wind scooper (8), the air inlet box (2) is fixedly connected with the inner box (19) and the outer box (1), a fan (5) is fixedly connected with the inner wall of the air inlet box (2), an air inlet plate (4) is fixedly connected with the outer wall of one end of the outer box (1), and the air inlet plate (4) is fixedly connected with the air inlet box (2).

5. The device for measuring the thermal shrinkage of the battery diaphragm according to claim 4, wherein one end of the fan (5) close to the air inlet plate (4) is provided with an activated carbon plate (3), and the activated carbon plate (3) is fixedly connected with the inner wall of the air inlet box (2).

6. The device for measuring the thermal shrinkage of the battery diaphragm according to claim 1, wherein a sponge plate (25) is fixedly connected to the top of the inner wall of the inner box (19), and a plurality of honeycomb activated carbons (24) are fixedly connected to the inner wall of the sponge plate (25).

7. The device for measuring the thermal shrinkage of the battery diaphragm according to claim 1, wherein an air outlet cover (15) is arranged at one end of the fixing frame (9) far away from the air guiding cover (8), the air outlet cover (15) is respectively and fixedly connected with the inner box (19) and the outer box (1), the heating pipe (6) is fixedly connected with the inner wall of the air outlet cover (15), and an air outlet plate (14) is fixedly connected with the inner wall of one end of the air outlet cover (15).