A device for studying battery thermal failure

Abstract

The present invention discloses a device for studying battery thermal failure. The laboratory is equipped with an experimental chamber and an assembly chamber. The slide is slidably arranged in the experimental chamber, a fixed block is fixed on the slide, and the battery to be tested is fixed on the fixed block. Two electric heating plates are respectively fixed on the fixed block and the battery to be tested. A winding drum is rotatably connected in the assembly chamber. Two wires are wound around the winding drum, with one end correspondingly connected to the two electric heating plates and the other end extending outside the laboratory to connect to a power source. The door of the experimental chamber is opened, and the slide is moved to remove the fixed block. The slide moves and drives the winding drum to rotate. The present invention makes the fixing and removal of the battery simple and quick, while ensuring the stability of the battery and the orderly management of the wires during the experiment.

Description

Technical Field

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

[0002] Batteries may experience thermal failure during use, which not only affects battery performance and lifespan but can also cause safety issues such as thermal runaway, fire, and even explosion. Therefore, research on the mechanisms of battery thermal failure is crucial in order to develop safer and more reliable battery products.

[0003] Currently, devices used to study battery thermal failure are generally long, thin, sealed tubes. These structures are designed to obtain data at different distances from the battery (such as pressure, temperature, and gas concentration). However, placing or removing a battery from a sealed tube requires using a long stick to push the battery in or out, making it very inconvenient. Furthermore, most existing batteries are secured to a heat-conducting block using a clamp-type structure, which then heats the block. This clamp-type structure is very cumbersome to install and disassemble (due to the need for several screws), making it inconvenient to use. Summary of the Invention

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

[0005] The technical solutions adopted in the present invention are:

[0006] A device for studying battery thermal failure includes a laboratory, a slide, a fixed block, a winding reel, a wire, and an electric heating plate. The laboratory is provided with an experimental chamber and an assembly chamber. The slide is slidably arranged in the experimental chamber, the fixed block is fixed on the slide, the battery to be tested is fixed on the fixed block, two electric heating plates are respectively fixed on the fixed block and the battery to be tested, the winding reel is rotatably connected in the assembly chamber, two wires are wound around the winding reel, one end of the wires is connected to the two electric heating plates, and the other end extends outside the laboratory and is connected to a power supply. The door of the experimental chamber is opened, the slide is moved to remove the fixed block, and the slide moves to drive the winding reel to rotate.

[0007] Furthermore, the fixed block includes a supporting copper block, a soft steel belt and a rotating shaft. The two rotating shafts are symmetrically connected to the supporting copper block. The two ends of the soft steel belt are respectively fixed with two rotating shafts. One of the rotating shafts is rotated and the soft steel belt is wound and tightened, and the rotating shaft is locked to fix the battery under test on the supporting copper block.

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

[0009] Furthermore, two key slots are provided on each rotating shaft, and a limiting ring is provided on the rotating shaft and on both sides of each key slot. Connecting keys are fixed at both ends of the soft steel belt. The connecting keys cooperate with the key slots and the limiting rings are moved axially. The limiting rings confine the connecting keys in the key slots.

[0010] Furthermore, locking holes are provided on both sides of the supporting copper block, and locking plates and threaded locking screws are inserted into the locking holes, and the locking plates are pressed against both ends of the battery under test in the axial direction through the locking screws.

[0011] Furthermore, the sliding of the slide plate and the rotation of the winding drum are performed simultaneously and are linked by the same linkage mechanism.

[0012] Furthermore, the linkage mechanism includes a drive shaft, a worm gear assembly, a bevel gear, and a driven shaft. The drive shaft is mounted within the assembly cavity and rotates along the sliding direction of the slide, with one end of the drive shaft protruding from the test chamber to facilitate manual rotation of the drive shaft. A rack is provided on the lower end surface of the slide, and the drive shaft meshes with the rack through the worm gear assembly. The driven shaft is rotatably connected to one side of the drive shaft and is perpendicular to the drive shaft. The drive shaft is linked to the driven shaft via the bevel gear, and the winding reel is fixed to the driven shaft.

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

[0014] Furthermore, a plurality of threaded holes communicating with the experimental cavity are provided on the outer wall of the laboratory, and the threaded holes are used to connect corresponding sensors.

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

[0016] This invention not only effectively addresses the existing issues of slender devices, awkward operation, and complex battery fixation, but also significantly improves the device's practicality and reliability. Its unique fixing block design and linkage mechanism make battery attachment and removal simple and quick, while also ensuring battery stability and orderly management of wires during experiments. This provides a more advanced and efficient experimental platform for studying battery thermal failure mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0019] Figure 3 for Figure 2 A partial enlarged view of .

[0020] Figure 4 for Figure 2 A partial enlarged view of .

[0021] Figure 5 for Figure 2 A partial enlarged view of .

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

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

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

[0025] Figure 9 This is an exploded view of a fixed block.

[0026] Figure 10 for Figure 9 A partial enlarged view of .

[0027] Figure 11 This is the assembly drawing of the mild steel belt and the rotating shaft.

[0028] Figure 12 for Figure 11 A partial enlarged view of .

[0029] Figure 13 It is a structural diagram of the mechanical linkage mechanism linking the slide plate and the winding drum.

[0030] In the picture:

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

[0032] 2. Skateboard;

[0033] 3. Fixing block; 31. Supporting copper block; 32. Soft steel belt; 33. Rotating shaft; 34. Locking buckle; 311. Tooth hole; 312. Locking hole; 313. Locking plate; 321. Connecting key; 331. Cross hole; 332. Keyway; 333. Limiting ring;

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

[0035] 71. Drive shaft; 72. 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 corresponding letters A, B, C, D, and E are the guide numbers of the enlarged views. DETAILED DESCRIPTION

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

[0038] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The device of the present invention includes a laboratory 1, a slide 2, a fixed block 3, a winding reel 4, a wire 5, and an electric heating plate 6. The laboratory 1 is a rectangular tubular structure, and is provided with two mutually separated experimental chambers 11 and an assembly chamber 12. The slide 2 slides within the experimental chamber 11, the fixed block 3 is fixed to the slide 2, and the battery under test 100 is fixed to the fixed block 3. Two electric heating plates 6 are respectively fixed to the fixed block 3 and the battery under test 100, and are used to heat the battery to simulate thermal failure conditions.

[0039] The winding drum 4 is rotatably connected in the assembly cavity 12. Two wires 5 are wound on the winding drum 4. One end of the wires 5 is respectively connected to two electric heating plates 6, and the other end extends out of the laboratory 1 and is connected to a power source.

[0040] To remove the battery 100 from the test chamber 11, simply open the chamber door and move the slide 2 to easily remove the fixed block 3. The slide 2 rotates the winding drum 4, allowing the wire 5 to retract and extend accordingly, ensuring that the wire 5 does not become excessively stretched or entangled. This design completely eliminates the traditional method of pushing and removing batteries with a long stick in a slender, sealed tube structure, greatly improving the convenience and safety of operation.

[0041] like Figure 6 and Figure 7 As shown, the fixing block 3 comprises a supporting copper block 31, a mild steel strip 32, and a rotating shaft 33. The supporting copper block 31 is a rectangular block, and two rotating shafts 33 are symmetrically connected to the supporting copper block 31. Holes are provided on the upper end surface of the supporting copper block 31 to expose the two rotating shafts 33 and to accommodate the mild steel strips 32. The two ends of the mild steel strip 32 are placed in corresponding holes, and the mild steel strip 32 is fixed to the rotating shafts 33. To secure the battery 100 under test, simply rotate one of the rotating shafts 33, and the mild steel strip 32 will wrap around it, tightening it, thereby stably securing the battery 100 under test to the supporting copper block 31.

[0042] like Figure 8After the rotating shaft is loosened, it will rotate, which will affect the fixing effect of the battery under test 100. To overcome this problem, the present application provides a cross hole 331 on one end face of the rotating shaft 33, and a tooth hole 311 that is coaxial with and passes through the cross hole 331 is provided on the outer wall of the supporting copper block 31. After the soft steel strip 32 is wound, tightened, and fixed to the battery under test 100, the locking buckle 34 is inserted into the tooth hole 311. The locking buckle 34 engages with the tooth hole 311 and the cross hole 331, thereby preventing the rotating shaft from rotating. In this way, the rotating shaft 33 is locked, ensuring that the position of the battery under test 100 remains stable during the experiment.

[0043] like Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, the connection structure between the soft steel belt 32 and the rotating shaft 33 is a quick-release structure that is easy to disassemble, which facilitates the replacement of damaged or burned soft steel belts 32. The specific assembly structure is as follows: two key slots 332 are provided on each rotating shaft 33, and a limiting ring 333 is provided on the rotating shaft 33 and on both sides of each key slot 332. Connecting keys 321 are welded to both ends of the soft steel belt 32, and the connecting keys 321 cooperate with the key slots 332. After the connecting keys 321 and the key slots 332 cooperate with each other, the limiting ring 333 can be axially moved to confine the connecting key 321 within the key slot 332, thereby achieving radial positioning of the connecting key 321. Similarly, the limiting ring 333 is also provided with a key slot, which cooperates with the connecting key 321 to prevent the limiting ring 333 from rotating.

[0044] The battery under test 100 is secured to the supporting copper block 31 using a soft steel strip 32. To further secure the battery under test 100, locking holes 312 are provided on both sides of the supporting copper block 31. Locking plates 313 are inserted into these holes and threadedly connected with locking screws (for ease of illustration, the locking screws are omitted in the figure). The locking screws force the locking plates 313 against the axial ends (i.e., the positive and negative terminals) of the battery under test 100, thereby limiting the axial position of the battery under test 100 and preventing it from moving axially, ensuring the stability and safety of the battery under test 100 during the experiment.

[0045] Compared with the prior art method of fixing the battery with a clamp-type structure, the design of the fixing block 3 of the present device makes the fixing and removal of the battery extremely simple and quick, greatly improving the efficiency of the experimental operation.

[0046] The upper end surface of the supporting copper block 31 is also sprayed with heat-insulating paint, which can reduce the diffusion of heat toward the bottom of the supporting copper block 31 and transfer the heat upward toward the battery.

[0047] like Figure 13The sliding of the skateboard 2 and the rotation of the winding drum 4 are synchronized through the same mechanical linkage mechanism, with a compact structure and good stability. The linkage mechanism includes a drive shaft 71, a worm gear assembly 72, a bevel gear 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 thereof protrudes outside the laboratory 1, which is convenient for 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 is meshed with the rack through the worm gear assembly 72, so that the rotation of the drive shaft 71 drives the sliding of the skateboard 2. 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 to the driven shaft 74 through the bevel gear 73, and the winding drum 4 is fixedly mounted on the driven shaft 74.

[0048] When the drive shaft 71 rotates, the bevel gear 73 drives the driven shaft 74 to rotate, which in turn causes the winding drum 4 to rotate synchronously, achieving precise coordination between the sliding of the slide 2 and the rotation of the winding drum 4. This linkage design not only improves the integrity and compactness of the device, but also ensures the orderly retraction and release of the wire 5 during the movement of the slide 2, avoiding the potential problems of excessive tension or entanglement of the wire 5, and significantly improving the stability and reliability of the device.

[0049] The driven shaft 74 is hollow, and a lead-in hole is provided in the laboratory 1, connecting it to the driven shaft 74. After being drawn from the winding reel 4, the wire 5 passes through the inner cavity of the driven shaft 74 and the lead-in hole, ultimately exiting the laboratory 1. This ingenious wiring design allows for a neater and more orderly arrangement of the wires 5, facilitating their extraction and connection while also reducing interference and wear within the device, further enhancing its performance and service life.

[0050] The outer wall of laboratory 1 is equipped with several threaded holes that connect to the experimental chamber 11. These holes are used to connect various sensors. During the experiment, these sensors can monitor various parameters within the experimental chamber 11 in real time, such as temperature, pressure, and gas concentration, providing comprehensive and accurate data support for studying battery thermal failure mechanisms. The threaded hole design not only facilitates the installation and removal of sensors, but also ensures a tight connection between the sensors and the experimental chamber 11, improving the accuracy and reliability of data monitoring.

[0051] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A device for studying battery thermal failure, characterized by: The invention comprises a laboratory (1), a slide (2), a fixed block (3), a winding drum (4), a wire (5) and an electric heating plate (6), wherein the laboratory (1) is provided with an experimental chamber (11) and an assembly chamber (12), the slide (2) is slidably arranged in the experimental chamber (11), the fixed block (3) is fixed on the slide (2), the battery to be tested (100) is fixed on the fixed block (3), two electric heating plates (6) are respectively fixed on the fixed block (3) and the battery to be tested, the winding drum (4) is rotatably connected in the assembly chamber (12), two wires (5) are wound on the winding drum (4), and one end thereof is connected to the two electric heating plates (6), and the other end thereof is extended out of the laboratory (1) and connected to a power source, the door of the experimental chamber (11) is opened, the slide (2) is moved to take out the fixed block (3), and the slide (2) moves and drives the winding drum (4) to rotate; The sliding of the slide plate (2) and the rotation of the winding drum (4) are performed simultaneously and are linked by the same linkage mechanism; The linkage mechanism comprises a driving shaft (71), a worm gear assembly (72), a bevel gear (73) and a driven shaft (74); the driving shaft (71) is arranged in the assembly cavity (12) and rotates along the sliding direction of the slide (2); one end of the driving shaft (71) protrudes outside the laboratory (1); a rack is provided on the lower end surface of the slide (2); the driving shaft (71) is meshed and linked with the rack through the worm gear assembly (72); the driven shaft (74) is rotatably connected to one side of the driving shaft (71) and is perpendicular to the driving shaft; the driving shaft (71) is linked to the driven shaft (74) through the bevel gear (73); and the winding drum (4) is fixed on the driven shaft (74).

2. The device for studying battery thermal failure according to claim 1, characterized in that: The fixed block (3) includes a supporting copper block (31), a soft steel belt (32) and a rotating shaft (33). The two rotating shafts (33) are symmetrically connected to the supporting copper block (31). The two rotating shafts (33) are fixed at both ends of the soft steel belt (32). One of the rotating shafts (33) is rotated and the soft steel belt (32) is wound and tightened, and the rotating shaft (33) is locked to fix the battery (100) to be tested 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 end face of the corresponding rotating shaft (33), and a tooth hole (311) is provided on the outer wall of the supporting copper block (31). The tooth hole (311) and the cross hole (331) are coaxial and pass through. A locking buckle (34) is inserted into the tooth hole (311). The locking buckle (34) is engaged with 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 slots (332) are provided on each rotating shaft (33), and a limiting ring (333) is provided on the rotating shaft (33) and on both sides of each key slot (332). Connecting keys (321) are fixed at both ends of the soft steel belt (32), and the connecting keys (321) cooperate with the key slots (332) to axially move the limiting ring (333), so that the limiting ring (333) limits the connecting keys (321) in the key slots (332).

5. The device for studying battery thermal failure according to claim 2, characterized in that: Locking holes (312) are provided on both sides of the supporting copper block (31), and locking plates (313) and threaded locking screws are inserted into the locking holes (312). The locking plates (313) are pressed against both ends of the battery (100) under test in the axial direction by the locking screws.

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

7. 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), and the threaded holes are used to connect corresponding sensors.

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