Battery fault detection device

Abstract

The invention relates to the technical field of battery fault detection devices, in particular to a battery fault detection device which comprises an arranged battery pack, and the arranged battery pack comprises two deformation detection devices and square batteries fixed to the front sides and the rear sides of the deformation detection devices. The partition cooling device comprises a splitter plate path arranged between the two deformation detection devices and a circulating cooling zone communicated with the splitter plate path to form a loop, and the circulating cooling zone is tightly attached to the inner side of a deformation touch plate arranged on the deformation detection devices. When the pressure ulceration mechanism is displaced, that is, when the square battery breaks down, as the pressure of cooling liquid entering the liquid inlet branch is increased, the tympanic membrane layer generates upward thrust on the ulceration piece under the action of water pressure, so that the ulceration piece deforms and is separated from a battery pole piece, and two kinds of separation conditions exist; according to the first mode, the spring 34 is compressed, and a gap is formed between the fester piece and the beam plate, and according to the second mode, the fester piece is flexibly arranged and can be broken or bent under the action of pressure, then the circuit is disconnected, and the function of protecting the circuit is achieved.

Description

Technical Field

[0001] This invention relates to the field of battery fault detection device technology, and particularly to a battery fault detection device. Background Technology

[0002] With the rise of the new energy industry, the safety of automotive batteries, as a power source, has become particularly important. However, in recent years, there have been numerous fires in new energy vehicles caused by thermal runaway of power batteries, which has seriously affected the vigorous promotion of new energy vehicles that use lithium-ion power batteries as energy storage devices.

[0003] Current battery testing primarily involves pre-installation checks to ensure battery integrity and safety, preventing thermal runaway in lithium-ion power batteries. However, real-time monitoring methods for lithium batteries during use are still lacking. The most common method is to use thermal sensors to detect abnormal battery heating. This method has several drawbacks: First, it cannot provide real-time information about abnormal battery conditions. By the time an alarm sounds, the battery may already be at the point of ignition, making risk control impossible. Second, the current lithium battery installation method makes thermal anomaly detection susceptible to external interference when a battery malfunctions. Summary of the Invention

[0004] The purpose of this invention is to provide a battery fault detection device to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a battery fault detection device, comprising: A battery pack is arranged, comprising two deformation detection devices and square batteries fixed on the front and rear sides of the deformation detection devices; A partitioned cooling device includes a flow divider plate disposed between the two deformation detection devices, and a circulating cooling belt connecting the flow divider plate to form a loop. The circulating cooling belt is in close contact with the inner side of the deformation contact plate disposed on the deformation detection device. A flow divider mechanism is disposed upstream of the circulating cooling belt to form a liquid channel for the circulating cooling belt to collect liquid. Each part of the circulating cooling belt located in the middle of the square battery is provided with a capillary cooling section, and the capillary cooling section is connected to the liquid channel through a three-part inlet. One end of the flow divider mechanism is located at the three-part inlet, and one end of the flow divider mechanism is attracted by a magnetic block. The magnetic block is located in the positive pressure chamber of the release nozzle. An external cooling branch includes an inlet branch and a return branch, which are connected and located close to the wiring position of the square battery for heat dissipation at the wiring position. A diaphragm layer is provided on both the inlet and return branches. A pressure rupture mechanism is provided in the return branch. The pressure rupture mechanism is used to move downward and switch to a new flow channel when the upstream fluid pressure of the return branch increases. The reflux mechanism includes a reflux path that connects to the new flow channel of the reflux branch, the reflux path that connects to the negative pressure port of the vacuum water pump installed on the partition cooling device, and a humidity sensor that is also installed in the reflux path. It also includes a controller, which is communicatively connected to a humidity sensor, a vacuum water pump, a frequency-modulated water pump, and an alarm.

[0006] Furthermore, the square battery has a frame-shaped chamber, the battery electrode is located in the frame-shaped chamber and is isolated by a beam plate, the beam plate is provided with a ruptured piece, the ruptured piece is in contact with the battery electrode by a spring, there is a gap between the two ruptured pieces and the beam plate, and the diaphragm layer is located in the gap.

[0007] Furthermore, it also includes a pressure deformation cavity plate, which is located between the two ulcerated pieces and is fixedly connected to the tympanic membrane layer. An external circuit contact pin connected to the ulcerated pieces is fixedly connected to the cavity plate.

[0008] Furthermore, it also includes an armored mold sleeve, which has two mounting cavities in the width direction that can accommodate two square batteries and a deformation detection device, and a space is reserved between the two mounting cavities for the installation of the main cooling circulation pipe, and the main cooling circulation pipe forms a circulation state with the partitioned cooling device on each battery pack.

[0009] Furthermore, the diversion mechanism includes a pressure chamber, one side of which is provided with a pressure diaphragm that fits against the deformation contact plate. The diversion mechanism also includes an elastic sheet with a diversion channel. The pressure chamber is provided with a pressure diversion port that communicates with the diversion channel. A baffle that can move within the diversion channel is provided in the pressure diversion port.

[0010] Furthermore, one side of the elastic sheet is fixedly connected to an embedded component via a soft connecting layer, and one side of the embedded component is integrally formed with an insert. The insert and the embedded component are respectively provided with a connecting port and a through port, and a diaphragm is provided on the connecting port.

[0011] Furthermore, the switching gate includes a vertical portion and an inclined portion disposed on one side of the vertical portion. The pressure rupture mechanism is located in the vertical portion and includes the switching gate. The switching gate is provided with an opening, which is located in the inclined portion. An expansion portion is also provided on the return branch. A second pressure chamber is provided inside the expansion portion. The second pressure chamber is under positive pressure. A second release nozzle is provided on one side of the second pressure chamber. The second release nozzle contacts the deformation contact plate. An elastic baffle is also provided. One end of the elastic baffle abuts against one side of the switching gate.

[0012] Furthermore, the deformation detection device also includes a contact foot, one side of which contacts the inner side of the deformation contact plate.

[0013] Furthermore, the main cooling circulation pipe is connected to the frequency-adjustable water pump, and the main cooling circulation pipe has a main pipeline. The main pipeline is provided with an outlet port and an inlet port at each position of the battery pack. The inlet port of the partitioned cooling device is connected to the outlet port, and the outlet port of the partitioned cooling device is connected to the inlet port on the main pipeline.

[0014] The technical effects and advantages of this invention are as follows: 1. When a battery bulges, the square batteries on both sides deform the deformation detection plate on the deformation detection device. Under pressure, the shunt mechanism narrows the fluid channel entering the three-way inlet. When the shunt mechanism is located on the side of the liquid channel and subjected to fluid pressure, it rises upwards, and the release nozzle opens under pressure. The internal positive pressure is released outwards, and one end of the shunt mechanism blocks the inlet of the capillary cooling section. This allows fluid to enter from the inlet branch, quickly removing heat from the battery electrode area. Furthermore, as the square batteries bulge... As the battery continues to deform, the pressure collapse mechanism inside the switching gate will shift, thereby changing the flow channel. After the change, the coolant circulating in the circulating cooling belt will switch to the return branch and flow out vertically. The fluid at the rear end of the circulating cooling belt will no longer be replenished. After the fluid changes the flow channel and enters the return path, the internal humidity sensor will sound an alarm. After the controller receives the signal, the vacuum water pump will start. The vacuum water pump will then draw water from the return path and concentrate it in the transparent cover at the return path location. This allows for quick confirmation of the location of the internal faulty battery damage later.

[0015] 2. Displacement will occur in the pressure-induced rupture mechanism. That is, when the square battery fails, as the pressure of the coolant entering the inlet branch increases, the diaphragm layer will be subjected to water pressure, which will exert an upward thrust on the rupture plate. This will cause the rupture plate to deform and separate from the battery electrode. There are two types of separation. The first is that the spring 34 is compressed, and there is a gap between the rupture plate and the beam plate. The other is that the rupture plate is flexible and will break or bend under pressure, thereby disconnecting the circuit and playing a role in protecting the circuit. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the armored mold and the battery pack arrangement in this invention; Figure 3 This is a bottom view of the armored mold and the battery pack in a fixed state in this invention; Figure 4 This is a schematic diagram of the partitioned cooling device and the square battery in this invention; Figure 5 This is a perspective view of the battery pack arrangement in this invention; Figure 6 This is a partial cross-sectional view of the battery pack arrangement in this invention; Figure 7 This is a schematic diagram of the return flow path in this invention; Figure 8 This is a schematic diagram of the contact foot in this invention; Figure 9 This is a cross-sectional view of the partitioned cooling device in this invention; Figure 10 This is a schematic diagram of the diversion mechanism in this invention; Figure 11 This is a schematic diagram of the return branch in this invention; Figure 12 This is a block diagram of the control principle in this invention.

[0017] In the picture: 1. Armored mold sleeve; 2. Battery pack arrangement; 3. Square battery; 31. Beam plate; 32. Battery electrode; 33. Fragmented sheet; 34. Spring; 4. Zoned cooling device; 41. Diverter plate; 42. Circulating cooling belt; 43. Capillary cooling section; 431. Current-gathering sleeve; 44. Diverter mechanism; 441. Pressure chamber one; 442. Pressure film; 443. Pressure guide port; 444. Elastic sheet; 445. Diverter channel; 446. Baffle; 447. Embedded part; 448. Flexible connection layer; 449. Insert strip; 4410. Connecting port; 4411. Diaphragm; 4412. Through port; 45. Three-way inlet; 46. Liquid channel; 47. Magnetic block; 5. Deformation detection device; 51. Deformation contact plate; 52. Contact foot; 53. Release nozzle one; 6. External fork cooling branch; 61. Liquid inlet branch; 62. Return branch; 63. Switching gate; 64. Pressure chamber two; 65. Release nozzle two; 66. Elastic baffle; 7. External circuit contact foot; 8. Pressure deformation chamber plate; 9. Return mechanism; 91. Vacuum pump; 92. Return path. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] To better understand the battery fault detection device provided in this application, a brief introduction to existing battery detection devices is given below. Common methods include thermal management of lithium batteries, which use coolant to cool each battery module and then detect the heat of the entire battery pack. While this method can detect battery temperature, it cannot accurately determine whether the fault is due to the battery's own energy consumption or external factors. Another method involves detecting each battery module individually. Although this accurately identifies the location of the battery fault, it lacks risk control management. The battery fault detection method disclosed in this application uses a deformation detection device between two faulty batteries to detect abnormalities. By displacing the device, the coolant flow path is changed while simultaneously blocking the original flow path. A humidity sensor detects the change in the flow path, allowing for precise battery detection while simultaneously disconnecting the battery from power. The method is as follows: Example 1

[0020] Reference Figures 1 to 12 The battery fault detection device shown includes: The battery pack 2 is arranged in a row. The battery pack 2 includes two deformation detection devices 5 and square batteries 3 fixed on the front and rear sides of the deformation detection devices 5. The partitioned cooling device 4 includes a flow divider 41 disposed between two deformation detection devices 5, and a circulating cooling belt 42 that connects the flow divider 41 to form a loop. The circulating cooling belt 42 is in close contact with the inner side of the deformation contact plate 51 disposed on the deformation detection device 5. A flow divider mechanism 44 is disposed upstream of the circulating cooling belt 42 to form a liquid channel 46. Each of the circulating cooling belts 42 located in the middle of the square battery 3 is provided with a capillary cooling section 43, and the capillary cooling section 43 is connected to the liquid channel 46 through a three-part inlet 45. One end of the flow divider mechanism 44 is located at the position of the three-part inlet 45, and one end of the flow divider mechanism 44 is attracted by a magnetic block 47. The magnetic block 47 is located in the positive pressure chamber of the release nozzle 53. The external cooling branch 6 includes an inlet branch 61 and a return branch 62. The inlet branch 61 and the return branch 62 are connected and are close to the wiring position of the square battery 3. They are used to dissipate heat from the wiring position of the square battery 3. Both the inlet branch 61 and the return branch 62 are provided with a diaphragm layer. The return branch 62 is provided with a pressure rupture mechanism. The pressure rupture mechanism is used to move downward and switch to a new flow channel when the upstream fluid pressure of the return branch 62 increases. The reflux mechanism 9 includes a reflux path 92 connected to a new flow channel of the reflux branch 62. The reflux path 92 is connected to the negative pressure port of the vacuum water pump 91 installed on the partition cooling device 4. A humidity sensor is also installed in the reflux path 92. It also includes a controller, which has communication connections to a humidity sensor, a vacuum water pump 91, a frequency-modulated water pump, and an alarm.

[0021] Unlike traditional testing devices, this overall testing device tests batteries during use. The main testing method involves using an armored mold 1 to restrict the arrangement of battery packs 2, with a deformation detection device 5 positioned between every two square batteries 3. When a battery bulges, the square batteries 3 on both sides compress the deformation detection device 5, causing it to deform. At this time, the deformation contact plate 51 on the deformation detection device 5 deforms, and the diversion mechanism 44, under pressure, narrows the fluid channel entering the three-way inlet 45. Thus, the diversion mechanism 44, located on the side of the liquid channel 46, is subjected to fluid pressure, causing it to rise upwards. The release nozzle 53, under pressure, opens, releasing the internal positive pressure outwards. Under gravity, the magnetic block 47 falls. One end of the diversion mechanism 44 can cool the capillary cooling section. The inlet of 43 is blocked, so the fluid enters from the inlet branch 61. Due to the increased flow rate and internal pressure in the inlet branch 61, the heat at the battery electrode 32 can be quickly carried away. As the deformation of the square battery 3 continues, the pressure collapse mechanism in the switching gate 63 will be displaced, thereby changing the flow channel. After the change, the coolant circulating in the circulating cooling belt 42 is switched to flow vertically out of the return branch 62. There is no more fluid replenishment at the rear end of the circulating cooling belt 42. After the fluid changes the flow channel and enters the return flow path 92, the internal humidity sensor will sound an alarm. After the controller receives the signal, the vacuum water pump 91 will start. The vacuum water pump 91 will suck up the return flow path 92 and concentrate it in the transparent cover at the position of the return flow path 92. This allows for quick confirmation of the location of the internal faulty battery damage later.

[0022] Another advantage of this design is that in the event of a failure, the coolant circulation path can be quickly cut off, allowing the coolant downstream of the circulating cooling zone 42 to be drawn back into the main cooling circulation pipe A through the main cooling circulation pipe A. There will not be too much coolant downstream. During the cutting-off process, the coolant at the front end is drawn back to prevent coolant leakage after deformation and to protect the integrity of the whole.

[0023] Modular design makes future replacements easier and cheaper.

[0024] During specific monitoring, after the humidity sensor detects the humidity, the controller receives the signal and first adjusts the frequency-modulated water pump to increase the water flow rate, which can quickly dissipate heat. The alarm will also sound. The vacuum pump 91 can draw back the fluid at the rear end of the circulating cooling belt 42 to prevent coolant leakage.

[0025] It should be noted that the system also includes an armored mold 1. The armored mold 1 has two mounting cavities in the width direction, each capable of accommodating two square batteries 3 and a deformation detection device 5. Space is reserved between the two mounting cavities for the installation of the main cooling circulation pipe A. The main cooling circulation pipe A forms a circulation loop with the partitioned cooling devices 4 on each battery pack 2. The deformation detection device 5 also includes a contact foot 52, one side of which contacts the inner side of the deformation contact plate 51. The main cooling circulation pipe A is connected to a frequency-controlled water pump and has a main pipeline. Each battery pack 2 has an outlet and an inlet on the main pipeline. The inlet of the partitioned cooling device 4 is connected to the outlet, and the outlet of the partitioned cooling device 4 is connected to the inlet on the main pipeline. When the contact foot 52 is compressed and moved, it can contact the pressure membrane 442, release nozzle 1 53, and release nozzle 2 65 located above it. Example 2

[0026] In the above embodiment, to better ensure that the faulty battery can be quickly disconnected, the square battery 3 has a frame-shaped chamber, the battery electrode 32 is located in the frame-shaped chamber and isolated by a beam plate 31. A rupture plate 33 is provided on the beam plate 31, and the rupture plate 33 contacts the battery electrode 32 through a spring 34. There is a gap between the two rupture plates 33 and the beam plate 31, and the diaphragm layer is located within the gap. The pressure rupture mechanism will displace; that is, when the square battery 3 fails, as the pressure of the coolant entering the inlet branch 61 increases, the diaphragm layer will be subjected to water pressure, generating an upward thrust on the rupture plate 33. This causes the rupture plate 33 to deform and detach from the battery electrode 32. There are two detachment scenarios: first, the spring 34 is compressed, leaving a gap between the rupture plate 33 and the beam plate 31; second, the rupture plate 33 is flexible and will break or bend under pressure, thereby disconnecting the circuit and protecting the circuit. It also includes a pressure deformation cavity plate 8, which is located between the two ulcerated pieces 33 and is fixedly connected to the tympanic membrane layer. An external circuit contact 7, which is connected to the ulcerated piece 33, is fixedly connected to the pressure deformation cavity plate 8. In order to better ensure the separation of the connection point, the tympanic membrane layer bulges, causing the pressure deformation cavity plate 8 to bulge. In this way, the pressure deformation cavity plate 8 and the external circuit contact 7 move synchronously, so that the external circuit contact 7 can quickly separate from the ulcerated piece 33. The three-step separation method can completely cut off the power. Example 3

[0027] To ensure that the capillary cooling section 43 and the downstream coolant remain in a liquid-free state after a battery failure, the diversion mechanism 44 includes a pressure chamber 441. A pressure diaphragm 442 that is in contact with the deformable contact plate 51 is provided on one side of the pressure chamber 441. The diversion mechanism 44 also includes an elastic sheet 444 with a diversion channel 445. A pressure diversion port 443 is provided in the pressure chamber 441 and communicates with the diversion channel 445. A baffle 446 that can move within the diversion channel 445 is provided in the pressure diversion port 443.

[0028] The upstream of the diversion mechanism 44 and the liquid inlet of the circulating cooling belt 42 form a flow-gathering cavity, and agglomeration is formed at the position of the liquid channel 46, which can provide flow rate for the subsequent coolant and remove the heat generated by the square battery 3 more quickly. The diversion mechanism 44 is a point connection. When water flows through inside and the square battery 3 is not faulty, the diversion mechanism 44 can adjust its posture according to the state of the water flow inside according to the speed difference of the frequency-controlled water pump. When the battery malfunctions, the baffle 446 in the shunt channel 445 will block the inner cavity of the shunt channel 445. This is mainly because the pressure diaphragm 442 is under pressure, and the air pressure in the pressure chamber 441 can drive the baffle 446 to move. As a result, water flow gathers at the liquid channel 46, causing the elastic sheet 444 to deform upward. This causes the other end of the shunt mechanism 44 to tilt upward and block the path into the capillary cooling section 43, blocking the liquid inlet of the converging sleeve 431. The coolant then gathers from the liquid inlet branch 61.

[0029] It should be further explained that one side of the elastic sheet 444 is fixedly connected to the embedded part 447 through the soft connection layer 448. One side of the embedded part 447 is integrally formed with an insert 449. The insert 449 and the embedded part 447 are respectively provided with a connecting port 4410 and a through port 4412. A diaphragm 4411 is provided on the connecting port 4410.

[0030] In the above embodiment, when the coolant accumulates in the liquid channel 46, as the diversion channel 445 gradually closes and the elastic sheet 444 rises, the embedded part 447 can be lifted from the circulating cooling belt 42 without any resistance due to the setting of the soft connection layer 448. After the embedded part 447 is separated from the circulating cooling belt 42, the through-hole 4412 forms a new channel. At this time, the insert 449 moves to the inlet of the converging sleeve 431. After the coolant enters, it can squeeze the diaphragm 4411 into the converging sleeve 431 and form a blocked state. Thus, the coolant that originally entered the converging sleeve 431 enters into the liquid inlet branch 61.

[0031] The purpose of this design is that when the deformation contact plate 51 deforms, the pressure film 442 deforms and the release nozzle 53 opens. After the magnetic block 47 falls, the embedded part 447 and the insert 449 quickly lift up, which can collect the coolant into the inlet branch 61. This not only allows the terminals to quickly disconnect during the battery deformation process, but also puts the damaged battery in a power-off state.

[0032] Of course, coolant will also be present in the inlet branch 61. In order to ensure that the downstream coolant is completely returned to the main cooling circulation pipe A, the switching gate 63 includes a vertical part and an inclined part set on one side of the vertical part. The pressure collapse mechanism is located in the vertical part, which includes the switching gate 63. The switching gate 63 is provided with a through port, which is located in the inclined part. The return branch 62 is also provided with an expansion part. The expansion part is provided with a pressure chamber 64. The pressure chamber 64 is under positive pressure. A release nozzle 65 is provided on one side of the pressure chamber 64. The release nozzle 65 contacts the deformation contact plate 51. An elastic baffle 66 is also provided. One end of the elastic baffle 66 abuts against one side of the switching gate 63.

[0033] When the coolant pressure in the return branch 62 increases, and due to the deformation of the deformable contact plate 51, the release nozzle 65 is squeezed. After the release nozzle 65 releases the air pressure in the pressure chamber 64, the expansion part contracts. After the pressure that was originally resisting the switching gate 63 disappears, the coolant pressure above causes the switching gate 63 to move downward. At this time, after the opening passes the inclined part, the elastic baffle 66 separates from the switching gate 63. The bottom end of the switching gate 63 moves down to below the expansion part, forming a new diversion channel. In this way, the coolant flowing back into the return branch 62 is cut off.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery fault detection device, characterized in that, include: A battery pack (2) is arranged, which includes two deformation detection devices (5) and square batteries (3) fixed on the front and rear sides of the deformation detection devices (5). A partitioned cooling device (4) includes a flow divider (41) disposed between two deformation detection devices (5) and a circulating cooling belt (42) that connects the flow divider (41) to form a loop. The circulating cooling belt (42) is closely attached to the inner side of the deformation contact plate (51) disposed on the deformation detection device (5). A flow divider mechanism (44) is disposed upstream of the circulating cooling belt (42) to form a liquid channel (46) that gathers. The circulating cooling belt (42) is provided with a capillary cooling part (43) at the middle position of the square battery (3). The capillary cooling part (43) is connected to the liquid channel (46) through a three-part port (45). One end of the flow divider mechanism (44) is located at the position of the three-part port (45). One end of the flow divider mechanism (44) is attracted by a magnetic block (47). The magnetic block (47) is located in the positive pressure chamber of the release nozzle (53). The external cooling branch (6) includes an inlet branch (61) and a return branch (62). The inlet branch (61) and the return branch (62) are connected and are close to the wiring position of the square battery (3) for heat dissipation at the wiring position of the square battery (3). Both the inlet branch (61) and the return branch (62) are provided with a diaphragm layer. The return branch (62) is provided with a pressure rupture mechanism. The pressure rupture mechanism is used to move downward and switch to a new flow channel when the upstream fluid pressure of the return branch (62) increases. The reflux mechanism (9) includes a reflux path (92) connected to the new flow channel of the reflux branch (62), the reflux path (92) is connected to the negative pressure port of the vacuum water pump (91) installed on the partition cooling device (4), and a humidity sensor is also installed in the reflux path (92); It also includes a controller, which is communicatively connected to a humidity sensor, a vacuum water pump (91), a frequency-modulated water pump, and an alarm.

2. The battery fault detection device according to claim 1, characterized in that, The square battery (3) has a frame-shaped chamber, and the battery electrode (32) is located in the frame-shaped chamber and is isolated by a beam plate (31). The beam plate (31) is provided with a ruptured piece (33). The ruptured piece (33) is in contact with the battery electrode (32) through a spring (34). There is a gap between the two ruptured pieces (33) and the beam plate (31), and the diaphragm layer is located in the gap.

3. The battery fault detection device according to claim 2, characterized in that, It also includes a pressure deformation cavity plate (8), which is located between two ulcerated pieces (33) and is fixedly connected to the tympanic membrane layer. An external circuit contact (7) connected to the ulcerated piece (33) is fixedly connected to the (8).

4. The battery fault detection device according to claim 3, characterized in that, It also includes an armored mold (1), which has two mounting cavities in the width direction that can accommodate two square batteries (3) and a deformation detection device (5), and a space is reserved between the two mounting cavities for the installation of the main cooling circulation pipe (A), and the main cooling circulation pipe (A) forms a circulation state with the partitioned cooling device (4) on each battery pack (2).

5. The battery fault detection device according to claim 4, characterized in that, The diversion mechanism (44) includes a pressure chamber (441), and a pressure film (442) that fits against the deformation contact plate (51) is provided on one side of the pressure chamber (441). The diversion mechanism (44) also includes an elastic sheet (444), and a diversion channel (445) is provided on the elastic sheet (444). A pressure diversion port (443) is provided in the pressure chamber (441) and communicates with the diversion channel (445). A baffle (446) that can move in the diversion channel (445) is provided in the pressure diversion port (443).

6. The battery fault detection device according to claim 5, characterized in that, One side of the elastic sheet (444) is fixedly connected to an embedded part (447) through a soft connecting layer (448). An insert (449) is integrally formed on one side of the embedded part (447). A connecting port (4410) and a through port (4412) are respectively opened on the insert (449) and the embedded part (447). A diaphragm (4411) is provided on the connecting port (4410).

7. A battery fault detection device according to claim 6, characterized in that, The switching gate (63) includes a vertical part and an inclined part located on one side of the vertical part. The pressure rupture mechanism is located in the vertical part and includes the switching gate (63). The switching gate (63) is provided with an opening located on the inclined part. The return branch (62) is also provided with an expansion part. The expansion part is provided with a pressure chamber two (64). The pressure chamber two (64) is under positive pressure. A release nozzle two (65) is provided on one side of the pressure chamber two (64). The release nozzle two (65) contacts the deformation contact plate (51). An elastic baffle (66) is also provided. One end of the elastic baffle (66) abuts against one side of the switching gate (63).

8. A battery fault detection device according to claim 7, characterized in that, The deformation detection device (5) also includes a contact foot (52), one side of which contacts the inner side of the deformation contact plate (51).

9. A battery fault detection device according to claim 8, characterized in that, The main cooling circulation pipe (A) is connected to the frequency-adjustable water pump. The main cooling circulation pipe (A) has a main pipeline. The main pipeline is provided with an outlet and an inlet at each position of the battery pack (2). The inlet of the partitioned cooling device (4) is connected to the outlet, and the outlet of the partitioned cooling device (4) is connected to the inlet on the main pipeline.

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