Power battery detection method

Abstract

The invention discloses a power battery detection method, which comprises the following steps of: installing an external impact detection mechanism on the outer wall of a battery box, monitoring whether the battery box is impacted or not in real time from different directions of the battery box, and detecting whether the battery box is impacted or not by installing a first deformation detection mechanism in the battery box. The first deformation detection mechanism is arranged on the battery box, and the liquid leakage detection mechanism is arranged on the first deformation detection mechanism, so that the deformation of the power battery in the battery box can be monitored in real time from different directions, and whether the power battery leaks liquid or not can be monitored in real time, and therefore, the condition that the power battery is extruded or leaks liquid can be comprehensively monitored; through cooperation of the second deformation detection mechanism and the liquid leakage detection mechanism, the second deformation detection mechanism is installed between the two adjacent power batteries, whether deformation or liquid leakage exists between the two adjacent power batteries in the battery box or not can be monitored in real time, and the detection accuracy of the power batteries is improved. And the comprehensiveness of power battery detection is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power battery detection, and in particular relates to a power battery detection method. Background Art

[0002] Power batteries are batteries that provide power for tools. They are mainly used in new energy vehicles, electric vehicles and other transportation vehicles. In order to avoid some unnecessary traffic accidents, for example, when new energy vehicles are slightly collided or squeezed, and the bottom of the vehicle is slightly supported, the collision sensor of the whole vehicle usually cannot detect the collision signal. At the same time, since the degree of squeezing of the battery pack is very slight, the battery system monitoring signal will not show obvious abnormalities, and such collisions or squeezing are difficult to be detected in time. In this way, the battery system situation is likely to be missed, resulting in safety hazards of the vehicle and safety accidents in some cases. Therefore, how to detect the collision or squeezing of the battery pack in time is a very urgent need.

[0003] At present, the detection method for power batteries is to place a detection unit in the battery housing, and use the resistance change of the detection unit to detect whether the power battery is collided or squeezed. For example, the patent application number is 201910701913.9, which discloses a power battery detection system, a power battery detection method and a power battery. The present application provides a power battery, which includes a detection unit, which is arranged in the housing of the power battery; a sensor, which is coupled to the detection unit to sense the conductive property of the detection unit; wherein the conductive property of the detection unit changes with its deformation. The power battery can be detected when it is squeezed.

[0004] However, due to the uncertainty of the position of the power battery being hit by external force or leaking, the above detection method is not convenient for all-round detection of the power battery, which limits the power battery detection and affects the accuracy of power battery detection. To this end, we propose a power battery detection method to solve the above problems, so that it can comprehensively monitor the situation of power battery being squeezed or leaking, and improve the accuracy of power battery detection. Summary of the invention

[0005] The object of the present invention is to provide a power battery detection method, which can comprehensively monitor the squeeze or leakage of the power battery and improve the accuracy of power battery detection to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A power battery detection method comprises the following steps:

[0008] S1. An external impact detection mechanism is installed on the outer wall of the battery box, and a first deformation detection mechanism is installed on the inner wall of the battery box. The external impact detection mechanism is mainly composed of a plurality of first airbags, which are respectively installed on the outer periphery of the battery box, and the first deformation detection mechanism is mainly composed of a plurality of second airbags, which are respectively installed on the inner wall of the battery box, and air pressure sensors are installed inside the inflation ports of the first airbags and the second airbags;

[0009] S2, connecting the air pressure sensors on the plurality of first airbags and the air pressure sensors on the plurality of second airbags to the controller through wires;

[0010] S3, installing a liquid leakage detection mechanism on the first deformation detection mechanism, and connecting the liquid leakage detection mechanism to a controller;

[0011] S4, using multiple air pressure sensors to monitor whether the battery box is deformed or impacted. When the air pressure sensor on the first airbag detects that the air pressure value inside the airbag fluctuates, it is determined that there is an impact on the outside of the battery box and the process goes to S6. When the air pressure sensor on the second airbag detects that the air pressure value inside the airbag fluctuates, it is determined that there is deformation inside the battery box and the process goes to S6. When the pressure sensor on the first airbag or the second airbag detects that the air pressure value inside the airbag does not fluctuate, it indicates that there is no abnormality in the power battery.

[0012] S5. Monitor whether the power battery in the battery box has leakage through the leakage detection mechanism. When the leakage detection mechanism is turned on, it means that the power battery has leakage and enters S6; when the leakage detection mechanism is not turned on, it means that the power battery has no leakage;

[0013] S6. The controller controls the alarm to sound an alarm and displays the abnormal position on the display.

[0014] Preferably, the external impact detection mechanism further includes a second support sheet for supporting the first airbag, a first installation cavity is formed between the second support sheet and the outer wall of the battery box, and the first airbag is located in the first installation cavity.

[0015] Preferably, the first deformation detection mechanism also includes a first support sheet corresponding to the number of second airbags, and multiple first support sheets are respectively fixed on the inner wall of the battery box, and a second installation cavity is formed between the first support sheet and the inner wall of the battery box, and the second airbag is located in the second installation cavity.

[0016] Preferably, the first airbag and the second airbag are both rectangular in shape, an inflation tube is provided on the first airbag and the second airbag, the sensing end of the air pressure sensor is sealed and installed in the inflation tube, and a sealing tube cover is detachably installed at one end of the inflation tube.

[0017] Preferably, the leakage detection mechanism includes a rubber mesh, a detection circuit board and an insulating protection sheet, the detection circuit board is located between the insulating protection sheet and the rubber mesh, the rubber mesh is in contact with the outer wall of the power battery, and the insulating protection sheet is adhered to the first support sheet through a rubber sheet.

[0018] Preferably, the detection circuit board includes a substrate layer, a first circuit layer and a second circuit layer, the substrate layer is located between the first circuit layer and the second circuit layer, the first circuit layer is bonded to the insulating protection sheet, the second circuit layer is bonded to the rubber mesh, and the first circuit layer and the second circuit layer are connected through copper-plated holes.

[0019] Preferably, the second circuit layer is composed of a plurality of mouth-shaped first conductive sheets arranged in descending order and a plurality of mouth-shaped second conductive sheets arranged in descending order, the first conductive sheets and the second conductive sheets are arranged crosswise and equidistantly, a plurality of the first conductive sheets are connected through the first circuit layer, and a plurality of the second conductive sheets are connected through the first circuit layer.

[0020] Preferably, a second deformation detection mechanism needs to be installed between steps S3 and S4, and the second deformation detection mechanism is movably placed between two adjacent power batteries inside the battery box, and a leakage detection mechanism is installed on opposite sides of the second deformation detection mechanism, and the second deformation detection mechanism and the leakage detection mechanism are connected to the controller. The second deformation detection mechanism is mainly composed of a third airbag, and an air pressure sensor is installed inside the inflation port of the third airbag. The air pressure sensor is used to monitor whether the air pressure value in the third airbag fluctuates. When fluctuations occur, it is determined that there is deformation between the two adjacent power batteries, and then enters S6.

[0021] Preferably, the second deformation detection mechanism further comprises a support seat, the support seat is provided with an installation groove for installing the third airbag, and the side of the support seat in contact with the power battery is attached with a liquid leakage detection mechanism.

[0022] Preferably, the third airbag is arranged in a rectangular shape, the length of the third airbag is the same as the length of the power battery, and the thicknesses of the first airbag, the second airbag and the third airbag are all the same.

[0023] Compared with the prior art, the power battery detection method proposed in the present invention has the following advantages:

[0024] 1. The present invention can monitor in real time from different directions whether the battery box is hit by an external impact detection mechanism installed on the outer wall of the battery box. By installing a first deformation detection mechanism inside the battery box and installing a leakage detection mechanism on the first deformation detection mechanism, it can not only monitor the deformation of the power battery inside the battery box from different directions in real time, but also monitor in real time whether the power battery is leaking, thereby realizing comprehensive monitoring of the power battery being squeezed or leaking, and improving the accuracy of power battery detection.

[0025] 2. The present invention cooperates with the second deformation detection mechanism and the leakage detection mechanism to install the second deformation detection mechanism between two adjacent power batteries, so as to monitor in real time whether there is deformation or leakage between each two adjacent power batteries in the battery box, thereby improving the comprehensiveness of power battery detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flowchart of the present invention;

[0027] Figure 2 It is a schematic diagram of the battery box structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the explosion structure of the battery box of the present invention;

[0029] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0030] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0031] Figure 6 It is a schematic diagram of the stacked structure of the liquid leakage detection mechanism of the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the detection circuit board of the present invention.

[0033] In the figure: 1. battery box; 2. external impact detection mechanism; 21. second support plate; 22. first airbag; 221. inflation tube; 23. first installation cavity; 3. first deformation detection mechanism; 31. first support plate; 311. leakage detection mechanism; 32. second airbag; 33. second installation cavity; 4. second deformation detection mechanism; 41. support seat; 42. third airbag; 5. rubber mesh; 6. detection circuit board; 61. first conductive sheet; 62. second conductive sheet; 7. insulating protection sheet. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] The present invention provides Figure 1-6 A power battery detection method shown includes the following steps:

[0036] S1. The external impact detection mechanism 2 is installed on the outer wall of the battery box 1, and the first deformation detection mechanism 3 is installed on the inner wall of the battery box 1. The external impact detection mechanism 2 is mainly composed of a plurality of first airbags 22, and the plurality of first airbags 22 are respectively installed on the outer periphery of the battery box 1. The first deformation detection mechanism 3 is mainly composed of a plurality of second airbags 32, and the plurality of second airbags 32 are respectively installed on the inner wall of the battery box 1. Air pressure sensors are installed inside the inflation ports of the first airbags 22 and the second airbags 32, and the air pressure sensors are used to monitor the air pressure value in the airbags in real time.

[0037] S2. The air pressure sensors on the multiple first airbags 22 and the air pressure sensors on the multiple second airbags 32 are connected to the controller through wires; the controller is set to be a 51 single-chip microcomputer controller, which is used to process the air pressure value sensed by the air pressure sensor in real time, and determine whether the air pressure value fluctuates, and control the alarm to sound an alarm according to the air pressure fluctuation signal, and at the same time display the abnormal position and the alarm through the display,

[0038] S3, installing the liquid leakage detection mechanism 311 on the first deformation detection mechanism 3, and connecting the liquid leakage detection mechanism 311 to the controller;

[0039] S4, using multiple air pressure sensors to monitor whether the battery box 1 is deformed or impacted. When the air pressure sensor on the first airbag 22 detects that the air pressure value inside the airbag fluctuates, it is determined that there is an impact on the outside of the battery box 1 and the process goes to S6. When the air pressure sensor on the second airbag 32 detects that the air pressure value inside the airbag fluctuates, it is determined that there is deformation inside the battery box 1 and the process goes to S6. When the pressure sensor on the first airbag 22 or the second airbag 32 detects that the air pressure value inside the airbag does not fluctuate, it indicates that there is no abnormality in the power battery.

[0040] S5. Monitor whether the power battery in the battery box 1 has leakage through the leakage detection mechanism 311. When the leakage detection mechanism 311 is turned on, it means that the power battery has leakage and enters S6; when the leakage detection mechanism 311 is not turned on, it means that the power battery has no leakage;

[0041] S6. The controller controls the alarm to sound an alarm and displays the abnormal position on the display;

[0042] By installing an external impact detection mechanism 2 on the outer wall of the battery box 1, it is possible to monitor in real time from different directions whether the battery box 1 is impacted. By installing a first deformation detection mechanism 3 inside the battery box 1 and installing a leakage detection mechanism 311 on the first deformation detection mechanism 3, it is possible not only to monitor in real time the deformation of the power battery inside the battery box 1 from different directions, but also to monitor in real time whether the power battery is leaking, thereby achieving comprehensive monitoring of the power battery being squeezed or leaking, and improving the accuracy of power battery detection.

[0043] Among them, the external impact detection mechanism 2 also includes a second support sheet 21 for supporting the first airbag 22. A first installation cavity 23 is formed between the second support sheet 21 and the outer wall of the battery box 1. The first airbag 22 is located in the first installation cavity 23. The second support sheet 21 uses a plate with a thickness of 0.2-0.5mm. The supporting force provided by the second support sheet 21 and the outer wall of the battery box 1 enables the first airbag 22 to maintain a constant shape when not subjected to external force. When subjected to external force, since the second support sheet 21 is relatively thin, the first airbag 22 will be squeezed by external force in time, thereby improving the accuracy of the airbag's force monitoring.

[0044] The first deformation detection mechanism 3 also includes a first support sheet 31 corresponding to the number of the second airbags 32. The plurality of first support sheets 31 are respectively fixed on the inner wall of the battery box 1. A second installation cavity 33 is formed between the first support sheet 31 and the inner wall of the battery box 1. The second airbag 32 is located in the second installation cavity 33. The first support sheet 31 uses a plate with a thickness of 0.2-0.5 mm. The supporting force provided by the first support sheet 31 and the inner wall of the battery box 1 enables the second airbag 32 to maintain a constant shape without being subjected to external force. When deformation occurs, the deformed position of the power battery squeezes the second airbag 32 through the first support sheet 31, so that the air pressure sensor can sense the change of the airbag in time, thereby improving the accuracy of deformation monitoring by the airbag.

[0045] The first airbag 22 and the second airbag 32 are both rectangular in shape, and an inflation tube 221 is provided on the first airbag 22 and the second airbag 32. The sensing end of the air pressure sensor is sealed and installed in the inflation tube 221. A sealing tube cover is detachably installed at one end of the inflation tube 221. The inflation tube 221 is used to facilitate filling the first airbag 22 and the second airbag 32 with a sufficient amount of gas. After the inflation is completed, the sealing tube cover is installed to seal the airbag to prevent leakage of the gas in the airbag.

[0046] The leakage detection mechanism 311 includes a rubber mesh 5, a detection circuit board 6 and an insulating protection sheet 7. The detection circuit board 6 is located between the insulating protection sheet 7 and the rubber mesh 5. The rubber mesh 5 is in contact with the outer wall of the power battery. The insulating protection sheet 7 is bonded to the first support sheet 31 through a film. The rubber mesh 5 is used to facilitate the leakage of liquid through the rubber mesh 5 to flow to the detection circuit board 6 when the power battery leaks. Since the leaked liquid is conductive, when the first conductive sheet 61 and the second conductive sheet 62 are connected, it indicates that the power battery is leaking. The insulating protection sheet 7 is used to protect the detection circuit board 6 and increase the safety of the detection circuit board 6. The detection circuit board 6 is bonded to the first support sheet 31 through a film, so that the detection circuit board 6 is detachable, which is convenient for replacing and installing the detection circuit board 6.

[0047] The detection circuit board 6 includes a substrate layer, a first circuit layer and a second circuit layer. The substrate layer is located between the first circuit layer and the second circuit layer. The first circuit layer is bonded to the insulating protection sheet 7, and the second circuit layer is bonded to the rubber mesh 5. The first circuit layer and the second circuit layer are connected through copper-plated holes. The first circuit layer is used to lead out the wire to facilitate detection of whether there is conduction between the first conductive sheet and the second conductive sheet.

[0048] The second circuit layer is composed of a plurality of first conductive sheets 61 in a mouth-shaped manner and arranged in descending order, and a plurality of second conductive sheets 62 in a mouth-shaped manner and arranged in descending order. The first conductive sheets 61 and the second conductive sheets 62 are arranged crosswise and equidistantly. The plurality of first conductive sheets 61 are conducted through the first circuit layer, and the plurality of second conductive sheets 62 are conducted through the first circuit layer. Through the cooperation of the first conductive sheets 61 and the second conductive sheets 62, the range of liquid leakage detection is increased, so that no matter where the liquid leaks into the detection circuit board 6, it can be discovered in time.

[0049] In view of the situation that multiple power batteries are installed in the battery box, the present invention also provides a power battery detection method. A second deformation detection mechanism 4 needs to be installed between steps S3 and S4. The second deformation detection mechanism 4 is movably placed between two adjacent power batteries in the battery box 1. A leakage detection mechanism 311 is installed on opposite sides of the second deformation detection mechanism 4, and the second deformation detection mechanism 4 and the leakage detection mechanism 311 are connected to the controller. The second deformation detection mechanism 4 is mainly composed of a third airbag 42. An air pressure sensor is installed inside the inflation port of the third airbag 42. The air pressure sensor is used to monitor whether the air pressure value in the third airbag 42 fluctuates. When fluctuations occur, it is determined that there is deformation between the two adjacent power batteries. If the air pressure sensor in the third airbag does not sense fluctuations in the air pressure value in the third airbag, it means that there is no deformation between the two adjacent power batteries. Through the cooperation of the second deformation detection mechanism 4 and the leakage detection mechanism 311, the second deformation detection mechanism 4 is installed between the two adjacent power batteries, which can monitor in real time whether there is deformation or leakage between each two adjacent power batteries in the battery box 1, thereby improving the comprehensiveness of power battery detection.

[0050] The second deformation detection mechanism 4 also includes a support seat 41, which is provided with an installation groove for installing the third airbag 42. The side of the support seat 41 that contacts the power battery is attached with a leakage detection mechanism 311. The thickness of the side walls of the support seat 41 that contact the power battery is between 0.1-0.5mm. The support seat 41 is used to provide supporting force for the third airbag 42, so that the third airbag 42 can maintain a constant state when not squeezed by external force. When subjected to external force, the side wall of the support seat 41 can be used to squeeze the third airbag 42, so that the air pressure value in the third airbag 42 fluctuates.

[0051] The third airbag 42 is arranged in a rectangular shape, and the length of the third airbag 42 is the same as the length of the power battery. The thicknesses of the first airbag 22, the second airbag 32 and the third airbag 42 are all the same, so that the first airbag 22 can be evenly distributed on different surfaces of the battery box 1, the second airbag 32 is evenly distributed inside the battery box 1, and the third airbag 42 can be stably combined with the power battery, thereby improving the comprehensiveness of monitoring the battery box 1 in different directions.

[0052] Based on the power battery detection method described above, the present invention further provides a power battery, including a battery box 1, wherein an external impact detection mechanism 2 is installed on the outer wall of the battery box 1, and a first deformation detection mechanism 3 is installed on the inner wall of the battery box 1, and a leakage detection mechanism 311 is installed on the first deformation detection mechanism 3. The external impact detection mechanism 2 is used to monitor in real time from different directions of the battery box 1 whether there is an impact on the battery box 1, and the first deformation detection mechanism 3 is used to monitor in real time the deformation of the power battery inside the battery box 1 from different directions. The leakage detection mechanism 311 is used to monitor in real time from different directions of the power battery whether there is leakage in the power battery, thereby realizing comprehensive monitoring of the power battery being squeezed or leaking, and improving the accuracy of power battery detection.

[0053] Finally, it should be noted that the above 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power battery detection method, characterized in that: The steps include: S1. An external impact detection mechanism (2) is installed on the outer wall of the battery box (1), and a first deformation detection mechanism (3) is installed on the inner wall of the battery box (1). The external impact detection mechanism (2) mainly comprises a plurality of first airbags (22), and the plurality of first airbags (22) are respectively installed on the outer periphery of the battery box (1). The first deformation detection mechanism (3) mainly comprises a plurality of second airbags (32), and the plurality of second airbags (32) are respectively installed on the inner wall of the battery box (1). Air pressure sensors are installed inside the inflation ports of the first airbags (22) and the second airbags (32); S2, connecting the air pressure sensors on the plurality of first air bags (22) and the air pressure sensors on the plurality of second air bags (32) to the controller via wires; S3, installing a liquid leakage detection mechanism (311) on the first deformation detection mechanism (3), and connecting the liquid leakage detection mechanism (311) to a controller; S4, using multiple air pressure sensors to monitor whether the battery box (1) is deformed or impacted. When the air pressure sensor on the first airbag (22) detects that the air pressure value inside the airbag fluctuates, it is determined that the battery box (1) is impacted and the process proceeds to S6. When the air pressure sensor on the second airbag (32) detects that the air pressure value inside the airbag fluctuates, it is determined that the battery box (1) is deformed and the process proceeds to S6. When the pressure sensor on the first airbag (22) or the second airbag (32) detects that the air pressure value inside the airbag does not fluctuate, it indicates that the power battery is not abnormal. S5, monitoring whether the power battery in the battery box (1) has leakage through the leakage detection mechanism (311); when the leakage detection mechanism (311) is turned on, it means that the power battery has leakage and the process proceeds to S6; when the leakage detection mechanism (311) is not turned on, it means that the power battery has no leakage; S6. The controller controls the alarm to sound an alarm and displays the abnormal position on the display.

2. A power battery detection method according to claim 1, characterized in that: The external impact detection mechanism (2) further comprises a second support sheet (21) for supporting the first airbag (22), a first installation cavity (23) being formed between the second support sheet (21) and the outer wall of the battery box (1), and the first airbag (22) being located in the first installation cavity (23).

3. A power battery detection method according to claim 2, characterized in that: The first deformation detection mechanism (3) further comprises a number of first support sheets (31) corresponding to the number of the second airbags (32); a plurality of the first support sheets (31) are respectively fixed to the inner wall of the battery box (1); a second installation cavity (33) is formed between the first support sheet (31) and the inner wall of the battery box (1); and the second airbags (32) are located in the second installation cavity (33).

4. A power battery detection method according to claim 3, characterized in that: The first airbag (22) and the second airbag (32) are both arranged in a rectangular shape; an inflation tube (221) is arranged on the first airbag (22) and the second airbag (32); a sensing end of the air pressure sensor is sealed and installed in the inflation tube (221); and a sealing tube cover is detachably installed at one end of the inflation tube (221).

5. A power battery detection method according to claim 4, characterized in that: The liquid leakage detection mechanism (311) comprises a rubber mesh (5), a detection circuit board (6) and an insulating protection sheet (7); the detection circuit board (6) is located between the insulating protection sheet (7) and the rubber mesh (5); the rubber mesh (5) is in contact with the outer wall of the power battery; and the insulating protection sheet (7) is attached to the first support sheet (31) via a rubber sheet.

6. A power battery detection method according to claim 5, characterized in that: The detection circuit board (6) comprises a substrate layer, a first circuit layer and a second circuit layer, the substrate layer is located between the first circuit layer and the second circuit layer, the first circuit layer is bonded to the insulating protection sheet (7), the second circuit layer is bonded to the rubber mesh (5), and the first circuit layer and the second circuit layer are connected via copper-plated holes.

7. A power battery detection method according to claim 6, characterized in that: The second circuit layer is composed of a plurality of first conductive sheets (61) in a mouth-shaped manner and arranged in descending order, and a plurality of second conductive sheets (62) in a mouth-shaped manner and arranged in descending order, the first conductive sheets (61) and the second conductive sheets (62) are arranged in a cross-equidistant manner, the plurality of first conductive sheets (61) are connected through the first circuit layer, and the plurality of second conductive sheets (62) are connected through the first circuit layer.

8. A power battery detection method according to any one of claims 1 to 7, characterized in that: A second deformation detection mechanism (4) needs to be installed between steps S3 and S4. The second deformation detection mechanism (4) is movably placed between two adjacent power batteries in the battery box (1). A leakage detection mechanism (311) is installed on opposite sides of the second deformation detection mechanism (4). The second deformation detection mechanism (4) and the leakage detection mechanism (311) are connected to a controller. The second deformation detection mechanism (4) is mainly composed of a third airbag (42). An air pressure sensor is installed inside the inflation port of the third airbag (42). The air pressure sensor is used to monitor whether the air pressure value in the third airbag (42) fluctuates. When fluctuations occur, it is determined that deformation occurs between the two adjacent power batteries, and the process proceeds to S6.

9. A power battery detection method according to claim 8, characterized in that: The second deformation detection mechanism (4) further comprises a support seat (41), the support seat (41) being provided with an installation slot for installing a third airbag (42), and a liquid leakage detection mechanism (311) being attached to the side of the support seat (41) in contact with the power battery.

10. A power battery detection method according to claim 9, characterized in that: The third airbag (42) is arranged in a rectangular shape, the length of the third airbag (42) is the same as the length of the power battery, and the thicknesses of the first airbag (22), the second airbag (32) and the third airbag (42) are all the same.

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