A battery internal pressure and swelling detection mechanism and detection method

Abstract

The present invention discloses a battery internal pressure and bulging detection mechanism and detection method, comprising: a bottom plate, a support seat provided at the upper end of the bottom plate, a battery body connected to the upper end of the support seat, a vent provided inside the positioning plate, a load-bearing assembly installed at the inner end of the positioning plate, a connecting block provided at the upper end of the positioning plate, a second transmission line provided at the inner end of the top plate, a data analyzer connected to the upper end of the data transmission line, a cover plate provided at the outer end of the display screen, and a button connected to the inner end of the cover plate. The battery internal pressure and bulging detection mechanism and detection method can detect the gas pressure within the battery cell, and at the same time, facilitate the positioning function of the battery internal pressure and fault detection mechanism when detecting the battery, and facilitate the battery internal pressure and bulging detection mechanism to bundle the transmission line, thereby preventing the transmission line from being pulled and broken due to the weight between the detectors.

Description

Technical Field

[0001] The present invention relates to the technical field of battery internal pressure and swelling detection, and in particular to a battery internal pressure and swelling detection mechanism and detection method. Background Art

[0002] Batteries must be safe and stable before use. Before use, they need to be tested for internal pressure and whether they swell during operation to ensure safe use. However, existing battery internal pressure and swell detection mechanisms do not position the battery pack thoroughly enough, making it difficult to ensure that the battery pack will not shift during the test, affecting the test results. Furthermore, the detection method cannot monitor internal pressure and expansion. Therefore, it is very important to design a battery internal pressure and swell detection mechanism with stable positioning function and the ability to monitor battery life through deformation monitoring, so that operators can quickly and accurately find abnormal batteries and replace them. For example:

[0003] Chinese patent publication number CN217304221U discloses a battery detection device for high-precision detection of battery swelling and stress deformation. The device comprises a plurality of stacked battery cells, a first sensing unit, a second sensing unit, a third sensing unit, a modulation and demodulation unit, and a determination unit. The first sensing unit is attached to the front and rear surfaces of each battery cell, the second sensing unit is attached to the opposite left and right surfaces of each group of battery cells arranged side by side, and the third sensing unit is attached to the opposite upper and lower surfaces of two stacked groups of battery cells. The modulation and demodulation unit is electrically connected to the first, second, third, and determination units. This device can monitor each battery cell in real time for swelling and stress deformation, effectively preventing safety accidents.

[0004] However, the above-mentioned prior art solutions have the following defects: lithium-ion batteries (battery cells) will generate gas inside due to their own chemical system or process defects, which will increase the pressure and cause the battery (battery cell) to swell and deform. If the internal pressure or swelling deformation exceeds the design allowable range, it will not only cause battery / system failure, but also trigger a series of safety accidents. Since the gas is generated inside a sealed and very narrow battery cell, it is difficult to directly detect the gas pressure inside the battery cell. At the same time, it is not convenient for the battery internal pressure and fault detection mechanism to perform the positioning function when detecting the battery, and it is not convenient for the battery internal pressure and swelling detection mechanism to bundle the transmission lines, and it is difficult to avoid the transmission lines being pulled and broken due to their own weight between the detectors. Therefore, the present invention provides a battery internal pressure and swelling detection mechanism and a detection method to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a battery internal pressure and swelling detection mechanism and detection method to solve the problem proposed in the above background technology that it is difficult to directly detect the gas pressure in the battery cell. At the same time, it is not convenient for the battery internal pressure and fault detection mechanism to perform the positioning function when detecting the battery, and it is not convenient for the battery internal pressure and swelling detection mechanism to bundle the transmission line, and it is difficult to avoid the transmission line being pulled and broken due to the dead weight between the detectors.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a battery internal pressure and swelling detection mechanism and detection method, comprising:

[0007] A bottom plate, wherein a support base is provided at the upper end of the bottom plate, and a fixing groove is provided inside the support base, the upper end of the support base is connected to the battery body, and a positioning plate is provided at the outer end of the battery body, a vent is provided inside the positioning plate, and a positioning block is installed at the lower end of the positioning plate;

[0008] A connecting block is provided at the outer end of the positioning plate, and a connecting bolt is connected to the inner end of the connecting block. A load-bearing assembly is installed at the inner end of the positioning plate, and the load-bearing assembly includes a load-bearing rod, a load-bearing plate and a limiting groove;

[0009] a first transmission line, which is provided at an inner end of the load-bearing assembly, and a first deformation sensor is mounted on the inner end of the first transmission line; a connecting block is provided at the upper end of the positioning plate, and the upper end of the connecting block is connected to the top plate; a second transmission line is provided at the inner end of the top plate, and a second deformation sensor is mounted on the outer end of the second transmission line, and a connecting plate is mounted on the lower end of the second deformation sensor;

[0010] A data analyzer is installed inside the protective frame, and a connector is provided at the outer end of the data analyzer. The upper end of the data analyzer is connected to a data transmission line, and a display screen is provided at the upper end of the data transmission line. A cover plate is installed at the outer end of the display screen, and a button is connected to the inner end of the cover plate.

[0011] Preferably, the support seats are arranged at equal intervals on the base plate, and the locking groove is opened in the middle of the support seat.

[0012] Preferably, the positioning plate is L-shaped, and the positioning plate is arranged at equal angles with respect to the center of the battery body.

[0013] Preferably, the positioning block is relatively snap-fitted with the base plate, and the connecting bolt is relatively threadedly connected to the connecting block and the base plate, and the connecting block is L-shaped.

[0014] Preferably, a load-bearing rod is provided at the inner end of the positioning plate, and a load-bearing plate is installed at the inner end of the load-bearing rod, and a limiting groove is provided inside the load-bearing plate.

[0015] Preferably, the load-bearing rod has an inclined structure, and the load-bearing rod is symmetrically arranged up and down with respect to the horizontal center axis of the load-bearing plate.

[0016] Preferably, the load-bearing plate and the limiting groove are arranged in a one-to-one correspondence, and the first transmission line is relatively engaged and connected with the load-bearing plate through the limiting groove.

[0017] Preferably, the first deformation sensors are arranged front-to-back symmetrically with respect to the vertical center axis of the battery body, and the first deformation sensors are connected to the second deformation sensors and each layer of the battery body in a one-to-one correspondence.

[0018] Preferably, the connecting block is relatively engaged with the positioning plate, and the connecting block is arranged at equal angles with respect to the center of the top plate, and the first transmission line and the second deformation sensor both pass through the inside of the top plate and the second transmission line.

[0019] Preferably, the method for detecting the internal pressure and expansion of the battery comprises the following steps:

[0020] Step 1: First, install the battery internal pressure detection mechanism, then place the first transmission line parallel to the support base, then arrange the second transmission line perpendicular to the support base, and snap the second transmission line into the locking groove opened inside the support base;

[0021] Step 2: Tie the first and second strain sensors together with the battery body with a cable tie. The first and second transmission lines are both installed at the lower end of the battery body, so that the first and second strain sensors connected to them are connected to each layer of the battery body. The first and second transmission lines are then engaged with the limiting grooves and the connecting plate, respectively, to prevent the first and second strain sensors from shaking or shifting.

[0022] Step 3: After the connecting block and the positioning plate at the lower end of the top plate are installed, the second transmission line and the first transmission line are connected to the data transmission line through the connector. Press the button to allow the display to control the connector through the data transmission line. The connector transmits the detection instructions to the first deformation sensor and the second deformation sensor respectively through the first transmission line and the second deformation sensor.

[0023] Step 4: After receiving instructions from the first transmission line and the second transmission line, the first strain sensor and the second strain sensor respectively detect the corresponding layers of the battery body. When the battery body is working, if the internal pressure of the battery body increases, the battery swells and deforms, which will cause deformation of the external fasteners and the cable ties tied to the outer ends of the battery body. The first strain sensor and the second strain sensor measure this pressure change, which can indirectly detect the pressure inside the battery cell. The data detected by the first strain sensor and the second strain sensor are transmitted to the inside of the connector through the first transmission line and the second transmission line. The connector organizes and analyzes the data and displays the detection results on the display screen through the data transmission line;

[0024] Step 5: The data displayed on the display screen can be used to determine the number of layers corresponding to the first strain sensor and the second strain sensor to determine whether the internal pressure is normal and whether the battery is swollen.

[0025] Compared with the prior art, the present invention has the following beneficial effects: the battery internal pressure and bulge detection mechanism and detection method can detect the gas pressure in the battery cell, and at the same time, facilitate the positioning function of the battery during detection by the battery internal pressure and fault detection mechanism, and facilitate the battery internal pressure and bulge detection mechanism to bundle the transmission line, thereby avoiding the situation where the transmission line is pulled and broken due to the dead weight between the detectors;

[0026] 1. A positioning block, a connecting block and a connecting block are provided. The connecting block is relatively engaged with the positioning plate and is arranged at equal angles with respect to the center of the top plate. The first transmission line and the second deformation sensor are both passed through the interior of the top plate and the second transmission line. The positioning block is relatively engaged with the bottom plate and the connecting bolt is relatively threadedly connected to the connecting block and the bottom plate. The connecting block is L-shaped, which facilitates the positioning function of the battery internal pressure and fault detection mechanism when detecting the battery;

[0027] 2. A load-bearing assembly, a connecting plate and a top plate are provided, which are inclined through the load-bearing rod, and the load-bearing rod is symmetrically arranged about the horizontal center axis of the load-bearing plate. The load-bearing plate and the limit groove are arranged one by one, and the first transmission line is relatively engaged with the load-bearing plate through the limit groove, so that the battery internal pressure and bulging detection mechanism can bundle the transmission line and avoid the situation where the transmission line is pulled and broken due to the dead weight between the detectors;

[0028] 3. A first deformation sensor, a second deformation sensor and a fixing groove are provided, which are arranged at equal intervals on the bottom plate through the support base, and the fixing groove is opened in the middle of the support base. The positioning plate is "L"-shaped, and the positioning plate is set at equal angles with respect to the center of the battery body. The first deformation sensor is symmetrically arranged front and back about the vertical central axis of the battery body, and the first deformation sensor is connected to the second deformation sensor and each layer of the battery body in a one-to-one correspondence, so that the first deformation sensor and the second deformation sensor can be used to sense the pressure changes between the binding tie and the battery body, thereby monitoring the internal pressure of the battery and the internal pressure of the expanded battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic top-view cross-sectional structure diagram of the connection between the second transmission line and the protective frame of the present invention;

[0031] Figure 3 This is a schematic diagram of the top view of the connection between the support seat and the locking groove of the present invention;

[0032] Figure 4 For the present invention Figure 1 A in the middle is an enlarged structural diagram;

[0033] Figure 5 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0034] Figure 6 This is a schematic diagram of the front cross-sectional structure of the connection between the protection frame and the cover plate of the present invention;

[0035] Figure 7 It is a schematic top view of the cross-sectional structure of the connection between the load-bearing assembly and the positioning plate of the present invention.

[0036] In the figure: 1. bottom plate; 2. support base; 3. fixing groove; 4. battery body; 5. positioning plate; 6. vent; 7. positioning block; 8. connecting block; 9. connecting bolt; 10. load-bearing assembly; 1001. load-bearing rod; 1002. load-bearing plate; 1003. limiting groove; 11. first transmission line; 12. first deformation sensor; 13. top plate; 14. connecting block; 15. second transmission line; 16. second deformation sensor; 17. connecting plate; 18. connector; 19. protective frame; 20. data analyzer; 21. data transmission line; 22. display screen; 23. cover plate; 24. button. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figure 1-7 The present invention provides a technical solution: a detection mechanism and method for detecting internal pressure and swelling of a battery, comprising: a bottom plate 1, a support seat 2 is provided at the upper end of the bottom plate 1, and a fixing groove 3 is provided inside the support seat 2, the upper end of the support seat 2 is connected to a battery body 4, and a positioning plate 5 is provided at the outer end of the battery body 4, a vent 6 is provided inside the positioning plate 5, and a positioning block 7 is installed at the lower end of the positioning plate 5; a connecting block 8 is provided at the outer end of the positioning plate 5, and a connecting bolt 9 is connected to the inner end of the connecting block 8, a load-bearing assembly 10 is installed at the inner end of the positioning plate 5, and the load-bearing assembly 10 includes a load-bearing rod 1001, a load-bearing plate 1002 and a limiting groove 1003; a first transmission line 11 is provided at the inner end of the load-bearing assembly 10, and the first transmission line 11 A first deformation sensor 12 is installed at the inner end of the positioning plate 5, a connecting block 14 is provided at the upper end of the positioning plate 5, and the upper end of the connecting block 14 is connected to the top plate 13, a second transmission line 15 is provided at the inner end of the top plate 13, and a second deformation sensor 16 is installed at the outer end of the second transmission line 15, and a connecting plate 17 is installed at the lower end of the second deformation sensor 16; a data analyzer 20 is installed inside the protective frame 19, and a connector 18 is provided at the outer end of the data analyzer 20, the upper end of the data analyzer 20 is connected to the data transmission line 21, and the upper end of the data transmission line 21 is provided with a display screen 22, the outer end of the display screen 22 is installed with a cover plate 23, and the inner end of the cover plate 23 is connected with a button 24, which constitute a battery internal pressure and swelling detection mechanism and detection method.

[0039] The method for detecting the internal pressure and expansion of the battery includes the following steps:

[0040] Step 1: First, install the battery internal pressure detection mechanism, then place the first transmission line 11 parallel to the support base 2, then arrange the second transmission line 15 perpendicular to the support base 2, and snap the second transmission line 15 into the locking groove 3 opened inside the support base 2;

[0041] Step 2: Tie the first and second strain sensors 12, 16 together with the battery body 4 with a cable tie. The first and second transmission cables 11, 15 are both installed at the lower end of the battery body 4, so that the first and second strain sensors 12, 16 connected to them are connected to each layer of the battery body 4. The first and second transmission cables 11, 15 are then engaged with the limiting grooves 1003 and the connecting plate 17, respectively, to prevent the first and second strain sensors 12, 16 from shaking or shifting.

[0042] Step 3: After the connecting block 14 at the lower end of the top plate 13 is installed with the positioning plate 5, the second transmission line 15 and the first transmission line 11 are connected to the data transmission line 21 via the connector 18. Press the button 24, so that the display screen 22 controls the connector 18 via the data transmission line 21. The connector 18 transmits the detection command to the first deformation sensor 12 and the second deformation sensor 16 respectively via the first transmission line 11 and the second deformation sensor 16;

[0043] Step 4: After receiving instructions from the first transmission line 11 and the second transmission line 15, the first strain sensor 12 and the second strain sensor 16 respectively detect the corresponding layers of the battery body 4. When the battery body 4 is working, if the internal pressure of the battery body 4 increases, the battery bulges and deforms, which will cause deformation of the external fasteners and the cable ties tied to the outer ends of the battery body 4. The first strain sensor 12 and the second strain sensor 16 measure this pressure change, and thus the pressure inside the battery cell can be indirectly detected. The data detected by the first strain sensor 12 and the second strain sensor 16 are transmitted to the inside of the connector 18 through the first transmission line 11 and the second transmission line 15. The connector 18 organizes and analyzes the data, and the detection results are displayed on the display screen 22 through the data transmission line 21;

[0044] Step 5: The data displayed on the display screen 22 can be used to determine the number of layers corresponding to the first strain sensor 12 and the second strain sensor 16 to determine whether the internal pressure is normal and whether the battery is swollen.

[0045] like Figure 1 、 Figure 3 and Figure 4As shown, the positioning plate 5 is in an "L" shape, and the positioning plate 5 is set at an equal angle with respect to the center of the battery body 4, the positioning block 7 is relatively engaged with the bottom plate 1, and the connecting bolt 9 is relatively threadedly connected to the connecting block 8 and the bottom plate 1, and the connecting block 8 is in an "L" shape. When the battery body 4 is placed on the support seat 2, the positioning blocks 7 at the lower end of the positioning plate 5 are respectively engaged with the corresponding grooves inside the bottom plate 1, and the connecting blocks 8 are respectively placed at the outer ends of the connections between the positioning plate 5 and the bottom plate 1, and the connecting bolts 9 are tightened. The connecting block 8 is in an "L" shape, so that the connecting block 8 and the positioning plate 5, and the connecting block 8 and the bottom plate 1 are all connected through the connecting bolts 9. The positioning plate 5 is in an "L" shape, so that the positioning plate 5 wraps the edges and corners of the battery body 4, which is convenient for the battery internal pressure and fault detection mechanism to perform positioning function when detecting the battery.

[0046] like Figure 1 、 Figure 5 、 Figure 6 and Figure 7 As shown, the support base 2 is arranged at equal intervals on the base plate 1, and the locking groove 3 is opened in the middle of the support base 2, the load-bearing rod 1001 is an inclined structure, and the load-bearing rod 1001 is symmetrically arranged about the horizontal center axis of the load-bearing plate 1002, the load-bearing plate 1002 and the limiting groove 1003 are arranged one by one, and the first transmission line 11 is relatively engaged with the load-bearing plate 1002 through the limiting groove 1003, the first deformation sensor 12 is symmetrically arranged about the vertical center axis of the battery body 4, and the first deformation sensor 12 is symmetrical with the second deformation sensor 16 and the battery body Each layer of the body 4 is connected in a one-to-one correspondence, the connecting block 14 is relatively engaged with the positioning plate 5, and the connecting block 14 is arranged at an equal angle with respect to the center of the top plate 13, and the first transmission line 11 and the second deformation sensor 16 are both passed through the inside of the top plate 13 and the second transmission line 15. As shown in the support base 2, when the battery body 4 is placed on the support base 2, the first transmission line 11 is placed parallel to the support base 2, and the second deformation sensor 16 is placed perpendicular to the support base 2, and the second deformation sensor 16 is engaged with the fixing groove 3 opened inside the support base 2;

[0047] When the battery body 4 tied with the cable tie is placed on the support seat 2, the first deformation sensor 12 and the second deformation sensor 16 are arranged between the cable tie and the battery body 4, and the first transmission line 11 and the second deformation sensor 16 are both arranged at the bottom of the battery body 4. The positioning plate 5 is connected to the bottom plate 1 through the positioning block 7, the connecting block 8 and the connecting bolt 9 to position the battery body 4, so that the first transmission line 11 is engaged with the limiting groove 1003 opened inside the load-bearing plate 1002, and the second deformation sensor 16 is engaged with the connecting plate 17, and the upper and lower ends of the load-bearing plate 1002 are both supported by the inclined load-bearing rod 1001, and the outer end of the load-bearing rod 1001 is connected to the inner end of the positioning plate 5, and is distributed at equal intervals, so that the load-bearing plate 1002 bundles the first transmission line 11 through the limiting groove 1003, and the connecting plate 17 bundles the second deformation sensor 16. After the sensor 16 is bundled, the load-bearing plate 1002 can support the first deformation sensor 12, and the connecting plate 17 can bear the weight of the second deformation sensor 16. After the first transmission line 11 and the second transmission line 15 are both passed through the interior of the top plate 13 and the protective frame 19 and connected to the data analyzer 20 through the connector 18, the connecting block 14 at the lower end of the top plate 13 is snapped into the upper end of the positioning plate 5 to complete the installation of the entire detection mechanism. Finally, the first deformation sensor 12 and the second deformation sensor 16 are used to sense the pressure changes between the binding tie and the battery body 4, thereby monitoring the internal pressure of the battery and the internal pressure of the expanded battery, which is convenient for the battery internal pressure and swelling detection mechanism to bundle the transmission lines, and avoid the situation where the transmission lines are pulled and broken due to the dead weight between the detectors. This is the use method of the battery internal pressure and swelling detection mechanism and the detection method.

[0048] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0049] 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 scope of protection of the present invention.

Claims

1. A battery internal pressure and swelling detection mechanism, characterized in that: include: A bottom plate, wherein a support base is provided at the upper end of the bottom plate, and a fixing groove is provided inside the support base, the upper end of the support base is connected to the battery body, and a positioning plate is provided at the outer end of the battery body, a vent is provided inside the positioning plate, and a positioning block is installed at the lower end of the positioning plate; A connecting block is provided at the outer end of the positioning plate, and a connecting bolt is connected to the inner end of the connecting block. A load-bearing assembly is installed at the inner end of the positioning plate, and the load-bearing assembly includes a load-bearing rod, a load-bearing plate and a limiting groove; a first transmission line, which is provided at an inner end of the load-bearing assembly, and a first deformation sensor is mounted on the inner end of the first transmission line; a connecting block is provided at the upper end of the positioning plate, and the upper end of the connecting block is connected to the top plate; a second transmission line is provided at the inner end of the top plate, and a second deformation sensor is mounted on the outer end of the second transmission line, and a connecting plate is mounted on the lower end of the second deformation sensor; A data analyzer is installed inside the protective frame, and a connector is provided at the outer end of the data analyzer. The upper end of the data analyzer is connected to a data transmission line, and a display screen is provided at the upper end of the data transmission line. A cover plate is installed at the outer end of the display screen, and a button is connected to the inner end of the cover plate.

2. The battery internal pressure and swelling detection mechanism according to claim 1, characterized in that: The support seats are arranged at equal intervals on the bottom plate, and the locking groove is opened in the middle of the support seat.

3. The battery internal pressure and swelling detection mechanism according to claim 1, characterized in that: The positioning plate is L-shaped and is arranged at equal angles with respect to the center of the battery body.

4. The battery internal pressure and swelling detection mechanism according to claim 1, characterized in that: The positioning block is relatively engaged with the base plate, and the connecting bolt is relatively threadedly connected to the connecting block and the base plate, and the connecting block is "L" shaped.

5. The battery internal pressure and swelling detection mechanism according to claim 1, characterized in that: The inner end of the positioning plate is provided with a load-bearing rod, and the inner end of the load-bearing rod is installed with a load-bearing plate, and a limiting groove is provided inside the load-bearing plate.

6. The battery internal pressure and swelling detection mechanism according to claim 5, characterized in that: The load-bearing rods are in an inclined structure, and are symmetrically arranged up and down about the horizontal center axis of the load-bearing plate.

7. The battery internal pressure and swelling detection mechanism according to claim 5, characterized in that: The load-bearing plates and the limiting grooves are arranged in a one-to-one correspondence, and the first transmission line is relatively engaged and connected with the load-bearing plates through the limiting grooves.

8. The battery internal pressure and swelling detection mechanism according to claim 1, characterized in that: The first deformation sensors are symmetrically arranged front to back about the vertical center axis of the battery body, and the first deformation sensors are connected to each layer of the battery body in a one-to-one correspondence.

9. The battery internal pressure and swelling detection mechanism according to claim 1, characterized in that: The connecting block is relatively engaged with the positioning plate and is arranged at equal angles with respect to the center of the top plate. The first transmission line and the second deformation sensor both pass through the interior of the top plate and the second transmission line.

10. A method for detecting a battery internal pressure and swelling according to claim 1, wherein the method comprises the following steps: Step 1: First, install the battery internal pressure detection mechanism, then place the first transmission line parallel to the support base, then arrange the second transmission line perpendicular to the support base, and snap the second transmission line into the locking groove opened inside the support base; Step 2: Tie the first and second strain sensors together with the battery body with a cable tie. The first and second transmission lines are both installed at the lower end of the battery body, so that the first and second strain sensors connected to them are connected to each layer of the battery body. The first and second transmission lines are then engaged with the limiting grooves and the connecting plate, respectively, to prevent the first and second strain sensors from shaking or shifting. Step 3: After the connecting block and the positioning plate at the lower end of the top plate are installed, the second transmission line and the first transmission line are connected to the data transmission line through the connector. Press the button to allow the display to control the connector through the data transmission line. The connector transmits the detection instructions to the first deformation sensor and the second deformation sensor respectively through the first transmission line and the second deformation sensor. Step 4: After receiving instructions from the first transmission line and the second transmission line, the first strain sensor and the second strain sensor respectively detect the corresponding layers of the battery body. When the battery body is working, if the internal pressure of the battery body increases, the battery swells and deforms, which will cause deformation of the external fasteners and the cable ties tied to the outer ends of the battery body. The first strain sensor and the second strain sensor measure this pressure change, which can indirectly detect the pressure inside the battery cell. The data detected by the first strain sensor and the second strain sensor are transmitted to the inside of the connector through the first transmission line and the second transmission line. The connector organizes and analyzes the data and displays the detection results on the display screen through the data transmission line; Step 5: The data displayed on the display screen can be used to determine the number of layers corresponding to the first strain sensor and the second strain sensor to determine whether the internal pressure is normal and whether the battery is swollen.

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