An apparatus and method for online testing of the strength of hot melt adhesive for storage batteries

Abstract

This invention provides an apparatus and method for online testing of the strength of hot melt adhesive for storage batteries, belonging to the field of battery testing technology. It includes a transmission track with a base plate on it. Along the transmission direction of the track, a dispensing area, a pressing area, and a testing area are sequentially arranged. Multiple dispensing nozzles are located above the dispensing area. A first linear drive mechanism and a first clamp are located above the pressing area. A pressing mechanism, a second linear drive mechanism, and a second clamp are located above the testing area. The pressing mechanism presses the base plate firmly onto the transmission track, and the second clamp holds the test electrode group located on the base plate. A tensile strength tester is located between the second linear drive mechanism and the second clamp, and the tensile strength tester is electrically connected to an ERP processor. This invention provides an online apparatus for testing the strength of hot melt adhesive for storage batteries, enabling online testing of hot melt adhesive, rapidly detecting the adhesive strength, with high accuracy, simple operation, and low cost.

Description

Technical Field

[0001] This invention belongs to the field of battery testing technology, and more specifically, relates to an apparatus and method for online testing of the strength of hot melt adhesive used in batteries. Background Technology

[0002] To enhance the vibration resistance of lead-acid batteries, most batteries have a portion of hot melt adhesive added inside during production. This adhesive is mainly applied to the bottom and top of the electrode group to improve the connection between the electrode group and the casing, preventing relative displacement between the electrode group and the battery casing due to large swings or vibrations during battery use.

[0003] Currently, in the lead-acid battery industry, the performance of hot melt adhesives is generally indirectly reflected by testing certain physical properties, such as flowability, softening point, melting point, or the time it takes for the adhesive to transition from a liquid to a solid state. However, these physical property tests require specialized equipment and personnel or submission to a third-party testing laboratory, which is complex and increases production costs. Alternatively, a pry bar can be used to directly pry out the electrode groups from the assembled semi-finished battery, mainly to feel the force applied during the prying process. This method relies too heavily on experience and cannot accurately reflect the adhesive's bonding performance, resulting in low testing accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide an online device for testing the strength of hot melt adhesive used in batteries. This device enables online testing, quickly detects the bonding strength of the hot melt adhesive, has high accuracy, is easy to operate, and does not increase costs.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An online device for detecting the strength of hot melt adhesive for storage batteries is provided, comprising a transmission track, a base plate on the transmission track, and a dispensing area, a pressing area, and a testing area sequentially arranged along the transmission direction of the transmission track; multiple dispensing nozzles above the dispensing area, the dispensing nozzles being connected to dispensing equipment via dispensing pipes; a first linear drive mechanism and a first clamp are provided above the pressing area, the first clamp holding a test electrode group, the first linear drive mechanism driving the first clamp to rise and fall; a pressing mechanism, a second linear drive mechanism, and a second clamp are provided above the testing area, the pressing mechanism pressing the base plate onto the transmission track, the second clamp holding the test electrode group located on the base plate, and the second linear drive mechanism driving the second clamp to rise to a preset height; a tensile strength tester is provided between the second linear drive mechanism and the second clamp, the tensile strength tester being electrically connected to an ERP processor for transmitting the tensile strength value to the ERP processor and calculating the bonding strength of the hot melt adhesive.

[0006] In one possible implementation, the glue injection area, the pressing area, and the detection area are all equipped with position sensors and positioning blocks. The position sensors sense the position of the base plate, and the positioning blocks are moved by the controller to position the base plate.

[0007] In one possible implementation, both the first linear drive mechanism and the second linear drive mechanism are longitudinally arranged electric push rods.

[0008] In one possible implementation, a glue-holding groove is provided in the middle of the upper surface of the base plate, and the glue-holding groove is adapted to the lower surface of the test electrode group.

[0009] In one possible implementation, the clamping mechanism includes a plurality of longitudinally arranged clamping cylinders, the lower drive end of which is connected to a fixing rod, and the plurality of fixing rods are clamped to the outer periphery of the glue-holding tank by the corresponding clamping cylinders.

[0010] The beneficial effects of the device for online testing of the strength of hot melt adhesive for storage batteries provided by this invention are as follows: Compared with the prior art, the base plate is placed on the transmission track, which moves the base plate to the glue injection area. The glue injection equipment injects the melted hot melt adhesive into the glue delivery pipe. The hot melt adhesive is sprayed onto the upper surface of the base plate through the glue injection nozzle, completing the glue injection operation on the base plate. The transmission track continues to move the base plate to the pressing area. The first linear drive mechanism drives the first clamp to move downward. The first clamp holds the test electrode group, so that the lower end of the test electrode group is pressed onto the base plate sprayed with hot melt adhesive, completing the pressing operation of the test electrode group on the base plate. Then, the first clamp releases the test electrode group, and the first linear drive mechanism drives the first clamp to move upward and reset. The transmission track continues to move the base plate to the testing area. At this time, the test electrode group has been bonded to the base plate with hot melt adhesive. The clamping mechanism is activated to press the base plate firmly onto the transmission track, and the second linear drive mechanism drives the second clamp to move downward and clamp the test electrode group. Subsequently, the second linear drive mechanism drives the second clamp to move upward, thereby lifting the test electrode group until it separates from the base plate. A tensile testing instrument detects the change in tensile force during the separation process between the base plate and the test electrode group, and transmits the tensile force value to the ERP processor. The ERP processor extracts and records the maximum tensile force value, and calculates the adhesive strength value of the hot melt adhesive using the adhesive strength formula. The device for online detection of the strength of hot melt adhesive for batteries provided by this invention can achieve online detection of hot melt adhesive, quickly detect the adhesive strength of hot melt adhesive, has high accuracy, is easy to operate, and has low cost.

[0011] The present invention also provides a method for online testing of the strength of hot melt adhesive for storage batteries, using the aforementioned device for online testing of the strength of hot melt adhesive for storage batteries, comprising the following steps:

[0012] S1: The base plate is transported along the conveyor track to the glue injection area, and hot melt adhesive is sprayed onto the base plate through the glue injection nozzle via the glue delivery pipe;

[0013] S2: The base plate after glue injection is transported to the pressing area along the transfer track. The first linear drive mechanism drives the first clamp holding the test electrode group to move downward, and places the test electrode group on the area of ​​the base plate sprayed with hot melt glue for bonding.

[0014] S3: The base plate with the test electrode group bonded to it is transported to the testing area along the transfer track. The clamping mechanism presses the base plate firmly onto the transfer track. The second linear drive mechanism drives the second clamp to move downwards and clamp the test electrode group bonded to the base plate. The second linear drive mechanism then pulls the test electrode group upwards through the second clamp until the test electrode group detaches from the base plate. The tensile strength tester calculates the maximum tensile force Fmax during the separation process between the base plate and the test electrode group and transmits it to the ERP processor. The ERP processor calculates the adhesive strength P of the hot melt adhesive using the adhesive strength formula.

[0015] P = (Fmax - mg) / (a ​​* b);

[0016] Where m is the weight of the test electrode group, a is the length of the test electrode group, and b is the width of the test electrode group.

[0017] In one possible implementation, in step S1, the hot melt adhesive is sprayed from a distance of at least 10 mm from the upper surface of the base plate, and the spraying time is 1.5 to 3 seconds.

[0018] In one possible implementation, in step S3, the base plate to which the test electrode group is bonded needs to remain stationary in the detection area for at least 120 seconds, and the second linear drive mechanism lifts the test electrode group upward at a speed of 0.3 to 0.8 mm / s via the second clamp.

[0019] In one possible implementation, after step S3, the base plate separated from the test electrode group is soaked in an organic solvent, and after the hot melt adhesive hardens, it is scraped off and reused.

[0020] This invention provides a method for online testing of the strength of hot melt adhesive used in storage batteries. The base plate passes sequentially through an adhesive injection area, a pressing area, and a testing area via a transport track. In the adhesive injection area, the base plate undergoes hot melt adhesive injection; in the pressing area, the test electrode group and the base plate are bonded together using hot melt adhesive; and in the testing area, the test electrode group and the base plate are separated. A tensile strength tester obtains the tensile force value, and an ERP processor calculates the bonding strength of the hot melt adhesive. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a device for online testing of the strength of hot melt adhesive for storage batteries, provided in an embodiment of the present invention;

[0023] Figure 2 This is a side view of the device in the detection area provided in an embodiment of the present invention;

[0024] Figure 3 This is a top view of the base plate provided in an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Transfer track; 2. Base plate; 3. Glue supply pipe; 4. Glue injection nozzle; 5. First linear drive mechanism; 6. First cylinder; 7. First clamp; 8. Test electrode group; 9. Second linear drive mechanism; 10. Clamping cylinder; 11. Stabilizing sleeve; 12. Second clamp; 13. Second cylinder; 14. Operation panel; 15. ERP processor; 16. Tensile strength tester; 17. Glue tank. Detailed Implementation

[0027] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] Please see Figure 1 and Figure 2The present invention will now describe an online device for detecting the strength of hot melt adhesive for storage batteries. An online device for testing the strength of hot melt adhesive for storage batteries includes a transmission track 1, a base plate 2 on the transmission track 1, and a glue injection area, a pressing area, and a testing area arranged sequentially along the transmission direction of the transmission track 1. Above the glue injection area are multiple glue injection nozzles 4, which are connected to glue injection equipment via glue delivery pipes 3. Above the pressing area are a first linear drive mechanism 5 and a first clamp 7, with a test electrode group 8 clamped on the first clamp 7. The first linear drive mechanism 5 drives the first clamp 7 to rise and fall. Above the testing area are a pressing mechanism, a second linear drive mechanism 9, and a second clamp 12. The pressing mechanism presses the base plate 2 onto the transmission track 1, and the second clamp 12 clamps the test electrode group 8 located on the base plate 2. The second linear drive mechanism 9 drives the second clamp 12 to rise to a preset height. A tensile strength tester 16 is provided between the second linear drive mechanism 9 and the second clamp 12. The tensile strength tester 16 is connected to an ERP processor 15, which transmits the tensile strength value to the ERP processor 15 and calculates the bonding strength of the hot melt adhesive.

[0029] This invention provides an online device for testing the strength of hot melt adhesive used in storage batteries. Compared with existing technologies, the device involves placing a base plate 2 on a transmission track 1, which moves the base plate 2 to the adhesive injection area. The adhesive injection equipment injects molten hot melt adhesive into the adhesive delivery pipe 3. The hot melt adhesive is then sprayed onto the upper surface of the base plate 2 through an adhesive injection nozzle 4, completing the adhesive injection operation on the base plate 2. The transmission track 1 continues to move the base plate 2 to the pressing area. A first linear drive mechanism 5 drives a first clamp 7 to move downwards. The first clamp 7 holds a test electrode group 8, pressing the lower end of the test electrode group 8 onto the base plate 2, which has been sprayed with hot melt adhesive, completing the pressing operation of the test electrode group 8 onto the base plate 2. Afterwards, the first clamp 7 releases the test electrode group 8, and the first linear drive mechanism 5 moves the first clamp 7 upwards to reset it. The transmission track 1 continues to move the base plate 2 to the testing area. At this time, the test electrode group 8 has been bonded to the base plate 2 with hot melt adhesive. The clamping mechanism is activated to press the base plate 2 firmly onto the transmission track 1. The second linear drive mechanism 9 drives the second clamp 12 to move downward and clamp the test electrode group 8. Then, the second linear drive mechanism 9 drives the second clamp 12 to move upward, thereby pulling the test electrode group 8 upward until the test electrode group 8 separates from the base plate 2. The tensile strength tester 16 detects the change in tensile strength during the separation process of the base plate 2 and the test electrode group 8, and transmits the tensile strength value to the ERP processor 15. The ERP processor 15 extracts and records the maximum tensile strength, and calculates the bonding strength value of the hot melt adhesive using the bonding strength formula. The device for online detection of the strength of hot melt adhesive for batteries provided by this invention can realize online detection of hot melt adhesive, quickly detect the bonding strength of hot melt adhesive, with high accuracy, simple operation, and low cost.

[0030] Preferably, the dispensing area, pressing area, and inspection area are all equipped with position sensors. These position sensors are photoelectric sensors that sense the position of the base plate 2 and send a signal to the corresponding controller. The controller then controls the corresponding positioning block to move onto the transport track 1, thereby blocking the base plate 2 and stopping it in the dispensing area, pressing area, or inspection area. After the work is completed in the dispensing area, pressing area, or inspection area, the controller controls the corresponding positioning block to leave the transport track 1, thus causing the base plate 2 to leave the working area.

[0031] The first linear drive mechanism 5 and the second linear drive mechanism 9 are both longitudinally arranged electric push rods, which are longitudinally installed with the help of the bracket above the transmission track 1. The lower end of the electric push rod is the drive end, and the first clamp 7 or the second clamp 12 is connected to the drive end. The first clamp 7 or the second clamp 12 is raised or lowered by the lifting and lowering of the drive end of the electric push rod.

[0032] The first clamp 7 and the second clamp 12 have the same structure, both including two opposing grippers and a cylinder for driving the two grippers to open and close. The cylinder of the first clamp 7 is defined as the first cylinder 6, and the cylinder of the second clamp 12 is defined as the second cylinder 13. In the initial state, the two grippers of the first clamp 7, driven by the first cylinder 6, clamp the test electrode group 8 on both sides. An electric push rod moves the test electrode group 8 downwards, and it is then bonded to the base plate 2 with hot melt adhesive. Afterwards, the first cylinder 6 moves the two grippers away from each other, releasing the test electrode group 8. The electric push rod then moves the first clamp 7 away from the test electrode group 8. Similarly, in the initial state, the two grippers of the second clamp 12 are far apart. The electric push rod moves the second clamp 12 downwards, placing the two grippers on both sides of the test electrode group 8. The second cylinder 13 moves the two grippers closer together, clamping the test electrode group 8 on both sides. The electric push rod, through the second clamp 12, moves the test electrode group 8 upwards, finally detaching it from the base plate 2.

[0033] Reference Figure 3 A glue-holding groove 17 is provided in the middle of the upper surface of the base plate 2. The glue-holding groove 17 has a depth of 1mm, and its width and length are both greater than the width and length of the test electrode group 8, such as a difference of 3-5mm. The lower end of the test electrode group 8 is fitted with the glue-holding groove 17, and the hot melt adhesive is firmly bonded, achieving a good bonding effect.

[0034] Reference Figure 1 and Figure 2 The clamping mechanism includes multiple clamping cylinders 10 and a fixing rod.

[0035] The clamping cylinder 10 is arranged longitudinally, with the lower part being the driving end. The driving end of the clamping cylinder 10 extends downward through the stabilizing sleeve 11 to form a fixing rod. The lower end of the fixing rod presses against the upper surface of the base plate 2, thereby fixing the base plate 2 onto the transmission track 1 in the test area.

[0036] Preferably, there are four clamping cylinders 10, the base plate 2 is a rectangular plate, and the four fixing rods corresponding to the four clamping cylinders 10 are respectively clamped to the four corners of the rectangular plate to ensure that the base plate 2 has good stability when pulling the test pole group 8 upward.

[0037] The tensile testing instrument 16 is connected to the ERP processor 15 at its rear end and to the operation screen 14 at its rear end. The tensile force value of the tensile testing instrument 16 is sent to the ERP processor 15, which then feeds back the calculated hot melt adhesive viscosity strength to the operation screen 14 for easy display. The operation screen 14 can also control the lifting mode and speed of the first linear drive mechanism 5 and the second linear drive mechanism 9, the action of the clamping mechanism, and the reset of the positioning block, based on the input data of the width and length of the electrode group.

[0038] The present invention also provides a method for online testing of the strength of hot melt adhesive for storage batteries, using the above-mentioned apparatus for online testing of the strength of hot melt adhesive for storage batteries, comprising the following steps:

[0039] S1: The base plate 2 is transported to the glue injection area along the conveying track 1, and the glue delivery pipe 3 sprays hot melt glue onto the base plate 2 through the glue injection nozzle 4;

[0040] S2: After the glue is injected, the base plate 2 is transferred to the pressing area along the transfer track 1. The first linear drive mechanism 5 drives the first clamp 7 holding the test electrode group 8 to move downward, and places the test electrode group 8 in the area of ​​the base plate 2 sprayed with hot melt glue for bonding.

[0041] S3: The base plate 2 with the test electrode group 8 bonded to it is transported to the testing area along the transport track 1. The clamping mechanism presses the base plate 2 onto the transport track 1. The second linear drive mechanism 9 drives the second clamp 12 to move downward and clamp the test electrode group 8 bonded to the base plate 2. The second linear drive mechanism 9 pulls the test electrode group 8 upward through the second clamp 12 until the test electrode group 8 detaches from the base plate 2. The tensile tester 16 measures the maximum tensile force Fmax during the separation process between the base plate 2 and the test electrode group 8 and transmits it to the ERP processor 15. The ERP processor 15 calculates the bonding strength P of the hot melt adhesive using the bonding strength formula.

[0042] P = (Fmax - mg) / (a ​​* b);

[0043] Where m is the weight of test pole group 8, a is the length of test pole group 8, and b is the width of test pole group 8.

[0044] This invention provides an online device for testing the strength of hot melt adhesive used in storage batteries. Compared with existing technologies, the base plate 2 passes through the glue injection area, the pressing area, and the testing area sequentially via the transmission track 1. In the glue injection area, the base plate 2 completes the hot melt adhesive injection process; in the pressing area, the test electrode group 8 and the base plate 2 are bonded together using hot melt adhesive; and in the testing area, the test electrode group 8 and the base plate 2 are separated. The tensile strength tester 16 obtains the tensile strength value, and the ERP processor 15 calculates the bonding strength of the hot melt adhesive.

[0045] The standard for hot melt adhesive bonding strength is set as follows: According to the current national standard (GB / T 5008-2013) regarding the vibration resistance of batteries, the maximum vertical acceleration of the battery is 50 m / s², and the weight of the electrode group is m. Therefore, the maximum instantaneous force applied to the hot melt adhesive is: F = 50 m (N). Thus, the critical bonding strength P... 临界 =F / (a*b)=50m / (a*b), where a is the length of the polar group and b is the width of the polar group.

[0046] Before production of batteries requiring adhesive bonding, operators can select the battery model to be produced in the ERP processor 15 system. At this time, the ERP processor 15 will push relevant data on the electrode group of this battery, including the critical bonding strength P. 临界 =F / (a*b) = 50m / (a*b), waiting for comparison.

[0047] In step S1, the glue nozzle 4 sprays hot melt adhesive at a distance of at least 10mm from the upper surface of the base plate 2 to ensure that the hot melt adhesive can enter the glue container 17 well and reduce splashing. The spraying time is 1.5 to 3 seconds to ensure that the glue container 17 can be completely filled with hot melt adhesive.

[0048] In step S3, the base plate 2 with the test electrode group 8 bonded to it needs to remain stationary in the testing area for at least 120 seconds. The weight of the test electrode group 8 itself allows it to adhere to the base plate 2, ensuring sufficient adhesion and maintaining bonding strength after cooling. The second linear drive mechanism 9 lifts the test electrode group 8 upwards at a speed of 0.3–0.8 mm / s via the second clamp 12. This reasonable lifting speed ensures that the hot melt adhesive bonded between the base plate 2 and the test electrode group 8 is subjected to continuous and stable tension until the base plate 2 and the test electrode group 8 separate, resulting in a more accurate tensile force value calculated by the tensile force tester 16.

[0049] After step S3, the base plate 2, after being separated from the test electrode group 8, is soaked in organic solvents such as industrial alcohol or styrene. After the hot melt adhesive hardens, it is forcefully removed, then washed with tap water, dried, and reused.

[0050] For the same batch of hot melt adhesive bonding strength test method, steps S1-S3 need to be repeated multiple times. Each time the test is conducted, the methods of steps S1 and S2 are the same, but the clamping method of the clamping mechanism in step S3 needs to be changed continuously.

[0051] Specifically, during the first test, four clamping mechanisms were used to simultaneously press the base plate 2 around its perimeter, and the bonding strength value P of the hot melt adhesive was calculated when the pressure was applied evenly.

[0052] To ensure the authenticity of the test data and verify that the hot melt adhesive application meets the requirements, a second and third test are required. During the second test, two clamping mechanisms on the same side along the length direction are used to clamp the base plate 2. The maximum tensile force F1max when the base plate 2 separates from the test electrode group 8 is read, and the adhesive strength P1 of the hot melt adhesive under unilateral pressure is calculated. 实际 During the third test, two clamping mechanisms on the same side of the width direction were used to clamp the base plate 2. The maximum tensile force F2max when the base plate 2 and the test electrode group 8 separated was read, and the bonding strength P2 of the hot melt adhesive under unilateral pressure was calculated. 实际 .

[0053] In the theoretical calculation process, P1 理论 Value and P2 理论 The value is related to the length and width of the base plate 2. Normally, the length is greater than the width, i.e., P2. 理论 Value greater than P1 理论 The value is determined by the fact that when clamping from one side, the other side will lift upwards at a certain angle as the test electrode group 8 is pulled upwards. Therefore, the maximum tensile force F1max or F2max when the base plate 2 and the test electrode group 8 separate is greater than the maximum tensile force Fmax under balanced pressure, i.e., F1max(F2max) = Fmax / cosα, where α is the angle of inclination of the base plate 2. Therefore, the final measured P1 value is... 理论 Value and P2 理论 All values ​​are greater than the P value.

[0054] Therefore, if the measured P2 实际 Value greater than P1 实际 Value, and P2 实际 Value and P1 实际 If all values ​​are greater than the P value, it can be determined that the hot melt adhesive spraying meets the requirements and the bonding strength measurement data is true and valid.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An apparatus for on-line detecting hot melt adhesive strength for a battery, characterized by, The device comprises a transmission track (1), a bottom plate (2) is arranged on the transmission track (1), an injection area, a pressing area and a detection area are sequentially arranged along the transmission direction of the transmission track (1); a plurality of injection nozzles (4) are arranged above the injection area, the injection nozzles (4) are communicated with an injection equipment through a glue conveying pipe (3) and are used for injecting hot melt adhesive onto the bottom plate (2); a first linear driving mechanism (5) and a first clamp (7) are arranged above the pressing area, a test pole group (8) is clamped on the first clamp (7), the first linear driving mechanism (5) is used for driving the first clamp (7) to move downward and press the lower end of the test pole group (8) on the hot melt adhesive of the bottom plate (2); a pressing mechanism, a second linear driving mechanism (9) and a second clamp (12) are arranged above the detection area, the pressing mechanism is used for pressing the bottom plate (2) on the transmission track (1), the second clamp (12) clamps the test pole group (8) on the bottom plate (2) and drives the second clamp (12) to rise through the second linear driving mechanism (9) to separate the test pole group (8) from the bottom plate (2), a tension detector (16) is arranged between the second linear driving mechanism (9) and the second clamp (12), the tension detector (16) is electrically connected with an ERP processor (15) and is used for transmitting a tension value to the ERP processor (15), the ERP processor (15) calculates the bonding strength of the hot melt adhesive through a formula P=(Fmax-mg) / (a*b), wherein Fmax is the maximum tension value of the tension detector (16) in the separation process of the bottom plate (2) and the test pole group (8), m is the weight of the test pole group (8), a is the length of the test pole group (8) and b is the width of the test pole group (8).

2. A device for on-line detection of hot melt adhesive strength for batteries as claimed in claim 1, wherein, The injection area, the pressing area and the detection area are all provided with a position sensor and a positioning block, the position sensor senses the position of the bottom plate (2) and controls the movement of the positioning block through a controller to position the bottom plate (2).

3. A device for on-line detection of hot melt adhesive strength for batteries as claimed in claim 1, wherein, The first linear driving mechanism (5) and the second linear driving mechanism (9) are both electric push rods arranged in the longitudinal direction.

4. A device for on-line detection of hot melt adhesive strength for batteries as claimed in claim 1, wherein, A glue containing groove (17) is arranged in the middle of the upper end surface of the bottom plate (2) and is matched with the lower end surface of the test pole group (8).

5. A device for on-line detection of hot melt adhesive strength for batteries as claimed in claim 4, wherein, The pressing mechanism comprises a plurality of longitudinally arranged pressing cylinders (10), the driving end of the lower part of the pressing cylinder (10) is connected with a fixed rod, a plurality of the fixed rods are pressed on the outer periphery of the glue containing groove (17) through the corresponding pressing cylinders (10).

6. A method of on-line detecting hot melt adhesive strength for a battery, characterized by, The device for detecting the strength of hot melt adhesive for storage batteries on line is used and comprises the following steps: S1: the bottom plate (2) is transmitted to the injection area along the transmission track (1), the glue conveying pipe (3) injects hot melt adhesive onto the bottom plate (2) through the injection nozzle (4); S2: The bottom plate (2) after glue injection is transmitted along the transmission track (1) to the pressing area, the first linear driving mechanism (5) drives the first clamp (7) holding the test pole group (8) to move downward, and the test pole group (8) is placed on the area of the bottom plate (2) injected with hot melt adhesive for bonding; S3: The bottom plate (2) with the test pole group (8) bonded is transmitted along the transmission track (1) to the detection area, the pressing mechanism presses the bottom plate (2) on the transmission track (1), the second linear driving mechanism (9) drives the second clamp (12) to move downward and clamps outside the test pole group (8) bonded on the bottom plate (2), the second linear driving mechanism (9) pulls the test pole group (8) upward through the second clamp (12) until the test pole group (8) is separated from the bottom plate (2); the tensile tester (16) measures the maximum tensile value Fmax during the separation of the bottom plate (2) and the test pole group (8) and transmits it to the ERP processor (15), and the ERP processor (15) calculates the bonding strength P of the hot melt adhesive through the bonding strength formula: P=(Fmax-mg) / (a*b); Wherein, m is the weight of the test pole group (8), a is the length of the test pole group (8), and b is the width of the test pole group (8).

7. A method of on-line detecting the hot melt adhesive strength for a battery as claimed in claim 6, wherein In step S1, the glue injection nozzle (4) is at least 10 mm away from the upper end face of the bottom plate (2) to inject hot melt adhesive, and the glue injection time is 1.5-3s.

8. A method of on-line detecting the hot melt adhesive strength for a battery as claimed in claim 6, wherein, In step S3, the bottom plate (2) with the test pole group (8) bonded needs to be stationary in the detection area for at least 120s, and the upward pulling speed of the test pole group (8) by the second linear driving mechanism (9) through the second clamp (12) is 0.3-0.8mm / s.

9. A method of on-line detecting the hot melt adhesive strength for a battery as claimed in claim 6, wherein, After step S3, the bottom plate (2) separated from the test pole group (8) is soaked in an organic solvent, and after the hot melt adhesive becomes hard, it is scooped out for repeated use.

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