Device for researching thermal failure of battery

Abstract

The invention discloses a device for researching thermal failure of a battery, a laboratory is provided with an experiment cavity and an assembly cavity, a sliding plate is slidably arranged in the experiment cavity, a fixed block is fixed on the sliding plate, a tested battery is fixed on the fixed block, two electric heating plates are respectively fixed on the fixed block and the tested battery, and a wire spool is rotatably connected in the assembly cavity. The two wires are wound on the wire spool, one ends of the wires are correspondingly connected with the two electric heating plates, the other ends of the wires extend out of the laboratory and are connected with a power source, the bin door of the experiment cavity is opened, the sliding plate is moved to take out the fixing block, and the sliding plate moves and drives the wire spool to rotate. According to the invention, the fixing and dismounting of the battery become simple, convenient and rapid, and the stability of the battery and the orderly management of the lead in the experiment process are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of battery testing, and particularly to a device for studying battery thermal failure. Background Art

[0002] During the use of batteries, thermal failure may occur, which not only affects the performance and lifespan of the batteries, but may also cause safety problems such as thermal runaway, fire, or even explosion. Therefore, it is crucial to study the mechanism of battery thermal failure in order to develop safer and more reliable battery products.

[0003] Currently, the devices for studying battery thermal failure are generally slender sealed tubes. The slender structure is set to obtain values at different distances from the battery (such as pressure, temperature, gas concentration, etc.). Because when placing the battery into the sealed tube or taking it out, a "long stick" is used to push the battery in or out, which is very inconvenient to use. In addition, most of the existing batteries are fixed to a heat conducting block by a hoop structure, and then the heat conducting block is heated. The hoop structure is very troublesome when disassembling and assembling the battery (because several screws need to be set for fixation), and it is not convenient to use. Summary of the Invention

[0004] The present invention provides a device for studying battery thermal failure to solve the problems existing in the above-mentioned prior art.

[0005] The technical solutions adopted by the present invention are as follows:

[0006] A device for studying battery thermal failure includes a laboratory, a sliding plate, a fixing block, a wire winding disc, wires, and an electric heating plate. The laboratory is provided with an experimental chamber and an assembly chamber. The sliding plate is slidably disposed in the experimental chamber. The fixing block is fixed on the sliding plate, and the battery under test is fixed on the fixing block. Two electric heating plates are respectively fixed on the fixing block and the battery under test. The wire winding disc is rotatably connected in the assembly chamber. The two wires are wound around the wire winding disc, and one end of each wire is correspondingly connected to the two electric heating plates, and the other end extends out of the laboratory and is connected to a power supply. By opening the door of the experimental chamber and moving the sliding plate to take out the fixing block, the sliding plate moves and drives the wire winding disc to rotate.

[0007] Furthermore, the fixing block includes a supporting copper block, a soft steel strip, and a rotating shaft. Two rotating shafts are symmetrically and rotatably connected to the supporting copper block. The two ends of the soft steel strip are respectively fixed to the two rotating shafts. By rotating one of the rotating shafts and winding up and tightening the soft steel strip, and locking the rotating shaft, the battery under test is fixed on the supporting copper block.

[0008] Furthermore, a cross hole is provided on one side end face corresponding to the rotating shaft, and a tooth hole is provided on the outer wall of the supporting copper block. The tooth hole is coaxial with and penetrates through the cross hole. A locking buckle is inserted into the tooth hole, and the locking buckle meshes with both the tooth hole and the cross hole to lock the rotating shaft.

[0009] Further, two keyways are provided on each rotating shaft. Limiting rings are sleeved on both sides of each keyway on the rotating shaft. Connecting keys are fixed at both ends of the soft steel strip. The connecting keys cooperate with the keyways. The limiting rings are axially moved to limit the connecting keys within the keyways.

[0010] Further, locking holes are provided on both sides of the supporting copper block. A locking piece is inserted into the locking hole and a locking screw is threadedly connected thereto. The locking piece is abutted against both ends in the axial direction of the battery to be measured by the locking screw.

[0011] Further, the sliding of the sliding plate and the rotation of the wire winding disc are carried out simultaneously and are linked by the same linkage mechanism.

[0012] Further, the linkage mechanism includes a driving shaft, a worm and worm gear assembly, bevel gears and a driven shaft. The driving shaft is rotatably arranged in the assembly cavity along the sliding direction of the sliding plate, and one end of the driving shaft protrudes outside the laboratory, which is convenient for manually rotating the driving shaft. A rack is provided on the lower end surface of the sliding plate. The driving shaft is meshed and linked with the rack through the worm and worm gear assembly. The driven shaft is rotatably connected to one side of the driving shaft and is perpendicular to the driving shaft. The driving shaft links the driven shaft through bevel gears. The wire winding disc is fixed on the driven shaft.

[0013] Further, the driven shaft is a hollow shaft. A lead hole communicating with the driven shaft is provided on the laboratory. The corresponding wires are led out of the laboratory through the inner cavity of the driven shaft and the lead hole.

[0014] Further, a plurality of threaded holes communicating with the experimental cavity are provided on the outer wall of the laboratory. The threaded holes are used for connecting corresponding sensors.

[0015] The present invention has the following beneficial effects:

[0016] The present invention not only effectively solves the problems of the existing technology such as the device being slender, inconvenient to operate and the battery fixing being complicated, but also significantly improves the practicability and reliability of the device. Its unique fixed block design and linkage mechanism make the fixing and disassembly of the battery simple and fast, while ensuring the stability of the battery and the orderly management of the wires during the experiment, providing a more advanced and efficient experimental platform for the research on the battery thermal failure mechanism. Description of the Drawings

[0017] Figure 1 is the structural diagram of the present invention.

[0018] Figure 2 is the internal structural diagram of the present invention.

[0019] Figure 3 is Figure 2 the partial enlarged view of

[0020] Figure 4 is Figure 2 a partially enlarged view of

[0021] Figure 5 is Figure 2 a partially enlarged view of

[0022] Figure 6 is the fixed structure diagram of the battery under test on the fixed block.

[0023] Figure 7 is the partial cross-sectional view of the fixed block.

[0024] Figure 8 is the assembly drawing of the locking buckle and the rotating shaft.

[0025] Figure 9 is the exploded view of the fixed block.

[0026] Figure 10 is Figure 9 a partially enlarged view of

[0027] Figure 11 is the assembly drawing of the soft steel strip and the rotating shaft.

[0028] Figure 12 is Figure 11 a partially enlarged view of

[0029] Figure 13 is the structure diagram of the linkage skateboard and the wire reel of the mechanical linkage mechanism.

[0030] In the figure:

[0031] 1. Laboratory; 11. Experimental chamber; 12. Assembly chamber;

[0032] 2. Skateboard;

[0033] 3. Fixed block; 31. Support copper block; 32. Soft steel strip; 33. Rotating shaft; 34. Locking buckle; 311. Tooth hole; 312. Locking hole; 313. Locking piece; 321. Connecting key; 331. Cross hole; 332. Keyway; 333. Limit ring;

[0034] 4. Wire reel; 5. Conducting wire; 6. Electric heating plate

[0035] 71. Driving shaft; 72. Worm and worm gear assembly; 73. Bevel gear; 74. Driven shaft.

[0036] Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 9 , Figure 10 , Figure 11 and Figure 12The letters A, B, C, D, and E involved correspond to the guiding numbers of the enlarged drawings. Detailed implementation mode

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the device of the present invention includes a laboratory 1, a sliding plate 2, a fixed block 3, a wire reel 4, a wire 5, and an electric heating plate 6. The laboratory 1 is a rectangular tubular structure, and two mutually separated experimental chambers 11 and assembly chambers 12 are provided inside the laboratory 1. The sliding plate 2 is slidably arranged in the experimental chamber 11, the fixed block 3 is fixed on the sliding plate 2, and the battery under test 100 is fixed on the fixed block 3. Two electric heating plates 6 are respectively fixed on the fixed block 3 and the battery under test 100 for heating the battery to simulate thermal failure conditions.

[0039] The wire reel 4 is rotatably connected in the assembly chamber 12, two wires 5 are wound around the wire reel 4, and one end of each wire is respectively connected to the two electric heating plates 6, and the other end extends out of the laboratory 1 and is connected to a power supply.

[0040] When it is necessary to take out the battery under test 100 from the experimental chamber 11, just open the door of the experimental chamber 11, and the fixed block 3 can be easily taken out by moving the sliding plate 2. During the movement of the sliding plate 2, the wire reel 4 will be driven to rotate, so that the wire 5 can be correspondingly wound and unwound along with the movement of the sliding plate 2, ensuring that the wire 5 will not be overly tightened or wound. This design completely abandons the method of pushing or taking out the battery with a long stick in the traditional slender closed tube structure, greatly improving the convenience and safety of operation.

[0041] As Figure 6 and Figure 7 shown, the fixed block 3 includes a supporting copper block 31, a soft steel strip 32, and a rotating shaft 33. The supporting copper block 31 is a rectangular block, two rotating shafts 33 are symmetrically rotatably connected to the supporting copper block 31, and holes for exposing the two rotating shafts 33 are provided on the upper end surface of the supporting copper block 31. These holes are for assembling the soft steel strip 32. Both ends of the soft steel strip 32 are respectively placed in the corresponding holes, and the soft steel strip 32 is fixed to the rotating shaft 33. When it is necessary to fix the battery under test 100, just rotate one of the rotating shafts 33, and the soft steel strip 32 will be wound and tightened around this rotating shaft, thereby stably fixing the battery under test 100 on the supporting copper block 31.

[0042] As Figure 8, after the rotating shaft is released, the rotating shaft will rotate back, which will affect the fixing effect of the battery 100 to be measured. To overcome this problem, a cross hole 331 is provided on one end face of the rotating shaft 33, and a tooth hole 311 coaxial with and penetrating the cross hole 331 is provided on the outer wall of the support copper block 31. After the soft steel strip 32 is wound, tightened and fixed to the battery 100 to be measured, a locking buckle 34 is inserted into the tooth hole 311. The locking buckle 34 meshes with both the tooth hole 311 and the cross hole 331, thereby preventing the rotating shaft from rotating back, thus realizing the locking of the rotating shaft 33 and ensuring that the position of the battery 100 to be measured remains stable during the experiment.

[0043] As Figure 9 , Figure 10 , Figure 11 and Figure 12 shown, the connection structure between the soft steel strip 32 and the rotating shaft 33 is a quick-release structure that is convenient for disassembly, which is convenient for replacing the damaged or burned soft steel strip 32. The specific assembly structure is as follows: two key grooves 332 are provided on each rotating shaft 33, and limiting rings 333 are sleeved on both sides of each key groove 332 on the rotating shaft 33. Connection keys 321 are welded to both ends of the soft steel strip 32, and the connection keys 321 cooperate with the key grooves 332. After the connection keys 321 and the key grooves 332 cooperate with each other, by axially moving the limiting rings 333, the connection keys 321 can be limited in the key grooves 332, thereby realizing the radial positioning of the connection keys 321. Similarly, key grooves are also provided on the limiting rings 333, which cooperate with the connection keys 321 to prevent the limiting rings 333 from rotating by themselves.

[0044] The battery 100 to be measured is fixed to the support copper block 31 through the soft steel strip 32. To further ensure the fixing effect of the battery 100 to be measured, locking holes 312 are provided on both sides of the support copper block 31. A locking piece 313 is inserted into the locking holes 312 and is threadedly connected with a locking screw (for the convenience of drawing, the locking screw is omitted in the figure). The locking piece 313 is abutted against both ends (i.e., the positive and negative terminals) of the battery 100 to be measured in the axial direction through the locking screw, so as to axially limit the battery 100 to be measured and prevent it from moving in the axial direction, ensuring the stability and safety of the battery 100 to be measured during the experiment.

[0045] Compared with the method of fixing the battery by using a hoop structure in the prior art, the design of the fixing block 3 of this device makes the fixing and disassembly of the battery extremely simple and fast, greatly improving the efficiency of the experimental operation.

[0046] Thermal insulation paint is also sprayed on the upper end face of the support copper block 31, which can reduce the diffusion of heat towards the lower part of the support copper block 31 and transfer the heat upwards towards the battery.

[0047] As Figure 13, the sliding of the skateboard 2 and the rotation of the wire winding disc 4 are synchronously linked through the same mechanical linkage mechanism, with a compact structure and good stability. The linkage mechanism includes a drive shaft 71, a worm and worm gear assembly 72, bevel gears 73 and a driven shaft 74. The drive shaft 71 is rotatably installed in the assembly cavity 12 along the sliding direction of the skateboard 2, and one end of it protrudes outside the laboratory 1, facilitating the operator to manually rotate the drive shaft 71. A rack is provided on the lower end surface of the skateboard 2, and the drive shaft 71 meshes with the rack through the worm and worm gear assembly 72, so as to realize the sliding of the skateboard 2 driven by the rotation of the drive shaft 71. The driven shaft 74 is rotatably connected to one side of the drive shaft 71 and is perpendicular to the drive shaft 71. The drive shaft 71 is linked with the driven shaft 74 through the bevel gears 73, and the wire winding disc 4 is fixedly installed on the driven shaft 74.

[0048] When the drive shaft 71 rotates, through the transmission of the bevel gears 73, it drives the driven shaft 74 to rotate, and then makes the wire winding disc 4 rotate synchronously, realizing the precise coordinated movement of the sliding of the skateboard 2 and the rotation of the wire winding disc 4. This linkage design not only improves the integrity and compactness of the device, but also ensures the orderly winding and unwinding of the wire 5 during the movement of the skateboard 2, avoiding potential problems such as over-tightening or entanglement of the wire 5, and significantly improving the stability and reliability of the device.

[0049] The driven shaft 74 adopts a hollow shaft structure design, and a lead hole communicating with the driven shaft 74 is provided on the laboratory 1. After the wire 5 is led out from the wire winding disc 4, it sequentially passes through the inner cavity of the driven shaft 74 and the lead hole, and finally leads out of the laboratory 1. This ingenious wiring design makes the arrangement of the wire 5 cleaner and more orderly, which not only facilitates the leading out and connection of the wire 5, but also helps to reduce the interference and wear of the wire 5 inside the device, further improving the performance and service life of the device.

[0050] A number of threaded holes communicating with the experimental cavity 11 are provided on the outer wall of the laboratory 1, and these threaded holes are used to connect various sensors. During the experiment, these sensors can real-time monitor various parameters in the experimental cavity 11, such as temperature, pressure, gas concentration, etc., providing comprehensive and accurate data support for studying the battery thermal failure mechanism. The design of the threaded holes not only facilitates the installation and disassembly of the sensors, but also ensures the tight connection between the sensors and the experimental cavity 11, improving the accuracy and reliability of data monitoring.

[0051] The above is only the preferred implementation mode of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A device for studying battery thermal failure, characterized in that: It includes a laboratory (1), a skateboard (2), a fixing block (3), a wire winding disc (4), a wire (5) and an electric heating plate (6). The laboratory (1) is provided with an experimental chamber (11) and an assembly chamber (12). The skateboard (2) is slidably arranged in the experimental chamber (11). The fixing block (3) is fixed on the skateboard (2). The battery under test (100) is fixed on the fixing block (3). Two electric heating plates (6) are respectively fixed on the fixing block (3) and the battery under test. The wire winding disc (4) is rotatably connected in the assembly chamber (12). The two wires (5) are wound around the wire winding disc (4), and one end of each wire corresponds to be connected to the two electric heating plates (6), and the other end extends out of the laboratory (1) to be connected to a power supply. Open the door of the experimental chamber (11), move the skateboard (2) to take out the fixing block (3), and the skateboard (2) moves and drives the wire winding disc (4) to rotate.

2. The device for studying battery thermal failure according to claim 1, characterized in that: The fixing block (3) includes a supporting copper block (31), a soft steel strip (32) and a rotating shaft (33). Two rotating shafts (33) are symmetrically and rotatably connected to the supporting copper block (31). Two ends of the soft steel strip (32) are respectively fixed to the two rotating shafts (33). Rotate one of the rotating shafts (33) to wind and tighten the soft steel strip (32), and lock the rotating shaft (33), and fix the battery under test (100) on the supporting copper block (31).

3. The device for studying battery thermal failure according to claim 2, characterized in that: A cross hole (331) is provided on one side end face corresponding to the rotating shaft (33). A tooth hole (311) is provided on the outer wall of the supporting copper block (31). The tooth hole (311) is coaxial and communicates with the cross hole (331). A locking buckle (34) is inserted into the tooth hole (311). The locking buckle (34) meshes with both the tooth hole (311) and the cross hole (331) to lock the rotating shaft (33).

4. The device for studying battery thermal failure according to claim 2, characterized in that: Two key grooves (332) are provided on each rotating shaft (33). Limiting rings (333) are sleeved on both sides of each key groove (33) on the rotating shaft (33). Connecting keys (321) are fixed at both ends of the soft steel strip (32). The connecting keys (321) cooperate with the key grooves (332). Axially move the limiting rings (333), and the limiting rings (333) limit the connecting keys (321) in the key grooves (332).

5. The device for studying battery thermal failure according to claim 2, wherein: Locking holes (312) are provided on both sides of the supporting copper block (31). A locking piece (313) is inserted into the locking holes (312) and a locking screw is threadedly connected. The locking piece (313) is abutted against both ends of the battery under test (100) in the axial direction by the locking screw.

6. The device for studying battery thermal failure according to claim 1, characterized in that: The sliding of the skateboard (2) and the rotation of the wire winding disc (4) are carried out simultaneously and are linked by the same linkage mechanism.

7. The device for studying battery thermal failure according to claim 1, wherein: The linkage mechanism includes a drive shaft (71), a worm and worm gear assembly (72), bevel gears (73) and a driven shaft (74). The drive shaft (71) is rotatably arranged in the assembly cavity (12) along the sliding direction of the slide plate (2), and one end of the drive shaft (71) protrudes outside the laboratory (1). A rack is provided on the lower end surface of the slide plate (2). The drive shaft (71) is meshed and linked with the rack through the worm and worm gear assembly (72). The driven shaft (74) is rotatably connected to one side of the drive shaft (71) and is perpendicular to the drive shaft. The drive shaft (71) drives the driven shaft (74) through the bevel gears (73). The wire winding disc (4) is fixed on the driven shaft (74).

8. The device for studying battery thermal failure according to claim 7, characterized in that: The driven shaft (74) is a hollow shaft. A lead hole communicating with the driven shaft (74) is provided on the laboratory (1). The corresponding wire (5) is led out of the laboratory (1) through the inner cavity of the driven shaft (74) and the lead hole.

9. The device for studying battery thermal failure according to claim 1, characterized in that: A plurality of threaded holes communicating with the experimental cavity (11) are provided on the outer wall of the laboratory (1). The threaded holes are used to connect corresponding sensors.

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