A testing device and method for detecting the performance of lead paste formula of lead-acid battery plates

Abstract

The present invention discloses a testing device for detecting the performance of the lead paste formula of the lead-acid battery plate, including a positive and negative plate group for testing, an adjusting clamp, and a placement groove for acid injection; the adjusting clamp includes a clamp, a screw, and a nut; the size of the positive plate in the positive and negative plate group is 60mm*40mm*5mm-40mm*20mm*3mm, and the size of the negative plate is 60mm*40mm*4mm-40mm*20mm*2mm; the positive and negative plate group is placed in the placement groove for acid injection and clamped or disassembled and taken out by adjusting the clamp; the present invention also discloses a testing method for the performance of the lead paste formula. The lead paste formula performance detection using the present invention can avoid the steps of battery shell glue sealing in conventional battery production, save battery production time, and the plate size is small, saving the cost of raw materials; during the battery test process, it is convenient to remove the plates at different test stages at any time for verification, avoiding the step of disassembling the battery.

Description

Technical Field

[0001] The invention belongs to the field of lead-acid batteries, and in particular relates to a testing device and method for detecting the performance of lead paste formula of lead-acid battery pole plates. Background Art

[0002] Lead paste, as an important component of lead-acid batteries, determines the life of the battery. Researchers mainly improve the battery life by optimizing its formula, thereby enhancing the market competitiveness of lead-acid batteries.

[0003] At present, the performance of the lead paste formula of the battery plate is mainly tested by disassembling the battery and taking out the plates for testing. The steps of disassembling the battery are relatively cumbersome, and it is also very inconvenient to take out the plates for testing and analysis during the battery performance test. Summary of the invention

[0004] In view of this, the present invention hopes to provide a testing device and method for detecting the performance of the lead paste formula of the lead-acid battery plate, which has the advantages of cost saving, high cost performance, and easy use. The lead paste formula performance detection of the present invention can avoid the steps of battery shell glue sealing in conventional battery production, save battery production time, and the plate size is smaller, saving raw material costs; during the battery testing process, it is convenient to remove the plate at different test stages at any time for verification, avoiding the step of disassembling the battery.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] The invention discloses a testing device for detecting the performance of a lead paste formula of a lead-acid battery plate, comprising a positive and negative plate group for testing, and also comprising an adjusting clamping plate and a placement groove for acid injection; the adjusting clamping plate comprises a clamping plate, a screw rod and a nut; the length, width and thickness dimensions of the positive plate in the positive and negative plate group are 60mm*40mm*5mm-40mm*20mm*3mm, and the length, width and thickness dimensions of the negative plate are 60mm*40mm*4mm-40mm*20mm*2mm; the positive and negative plate group is placed in the placement groove for acid injection and is clamped or disassembled and taken out by the adjusting clamping plate.

[0007] Preferably, the positive and negative electrode plate group may be a 4-positive 5-negative structure.

[0008] Preferably, the length, width and thickness of the positive electrode plates in the positive and negative electrode plate groups are 50mm*30mm*4mm, and the length, width and thickness of the negative electrode plates are 50mm*30mm*3mm.

[0009] Preferably, the acid injection placement groove is a U-shaped groove.

[0010] Preferably, the clamping plate, screw rod, nut and placement groove are all made of polytetrafluoroethylene.

[0011] The present invention also provides a test method for detecting the performance of the lead paste formula of the lead-acid battery plate, using the test device, comprising the following steps:

[0012] Apply equal amounts of the positive lead paste and negative lead paste to be tested to the positive grid and the negative grid to form a positive plate and a negative plate, respectively. The length, width and thickness of the positive plate are 60mm*40mm*5mm-40mm*20mm*3mm, and the length, width and thickness of the negative plate are 60mm*40mm*4mm-40mm*20mm*2mm;

[0013] After the positive and negative plates are cured and dried, wires are welded to the tabs respectively, and the plates are assembled into positive and negative plate groups through a separator, and the positive and negative plate groups are clamped in an acid injection placement tank by adjusting the clamping plate, assembled into a battery, and acid is injected for formation;

[0014] The performance test is carried out on the qualified battery after formation, and the middle plate of the battery can be taken out at any time for analysis by adjusting the clamping plate.

[0015] Preferably, the positive and negative electrode plate group can be a 4-positive 5-negative structure; the length, width and thickness of the positive electrode plate are 50mm*30mm*4mm, and the length, width and thickness of the negative electrode plate are 50mm*30mm*3mm.

[0016] Preferably, the acid injection placement groove can be a U-shaped groove.

[0017] Furthermore, the adjusting clamp includes a clamp, a screw and a nut, and the battery middle plate can be taken out at any time for analysis through the adjusting clamp to detect the performance of the lead paste formula of the lead-acid battery plate.

[0018] Preferably, the adjusting splint and the placement groove are both made of polytetrafluoroethylene.

[0019] The beneficial effects of the present invention are as follows: the present invention has the advantages of cost saving, high cost performance, and easy use. The present invention is used to test the performance of the lead paste formula, which can avoid the steps of battery shell glue sealing in conventional battery production, save battery production time, and the produced plate size is smaller, saving raw material costs; during the battery testing process, it is convenient to remove the plates at different test stages at any time for verification, avoiding the step of disassembling the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a front view of a testing device for detecting the performance of a lead paste formula for a lead-acid battery plate according to an embodiment of the present invention;

[0021] Figure 2 A schematic top view of a testing device for detecting the performance of a lead paste formula for a lead-acid battery plate according to an embodiment of the present invention;

[0022] Figure 3 A schematic flow chart of a testing method for detecting the performance of a lead paste formula for lead-acid battery plates according to an embodiment of the present invention;

[0023] Among them: 1 is the positive plate, 2 is the negative plate, 3 is the positive plate ear, 4 is the negative plate ear, 5 is the wire on the ear, 6 is the diaphragm, 7 is the clamping plate, 8 is the screw, 9 is the nut, and 10 is the placement groove. DETAILED DESCRIPTION

[0024] In order to more thoroughly understand the features and technical contents of the present invention, the implementation of the present invention is described in detail below.

[0025] Figure 1 and Figure 2 They are respectively a front view and a top view schematic diagram of a testing device for detecting the performance of a lead paste formula for a lead-acid battery plate according to an embodiment of the present invention, as Figure 1 and Figure 2 As shown, it includes a positive and negative plate group for testing, and also includes an adjusting clamp and a placement groove 10 for acid injection; the adjusting clamp includes a clamp 7, a screw 8, and a nut 9; the length, width and thickness dimensions of the positive plate 1 in the positive and negative plate group are 60mm*40mm*5mm-40mm*20mm*3mm, and the length, width and thickness dimensions of the negative plate 2 are 60mm*40mm*4mm-40mm*20mm*2mm; the positive and negative plate group is placed in the placement groove 10 for acid injection and is clamped or disassembled and taken out by the adjusting clamp.

[0026] Here, the positive and negative electrode plate group is specifically composed of a plurality of positive and negative electrode plates alternately arranged with separators 6 therebetween and connected in parallel via wires 5 on their respective tabs (the number of negative electrode plates is one more than the number of positive electrode plates).

[0027] Here, the tabs include a positive electrode plate tab 3 and a negative electrode plate tab 4 .

[0028] Preferably, the positive and negative electrode plate group may be a 4-positive 5-negative structure.

[0029] Preferably, the length, width and thickness of the positive plate 1 in the positive and negative plate group are 50mm*30mm*4mm, and the length, width and thickness of the negative plate 2 are 50mm*30mm*3mm.

[0030] Here, the adjusting clamp is composed of a clamp 7, a screw 8, and a nut 9, and can be screwed to tighten or disassemble the positive and negative plate groups placed in the acid injection placement tank 10 to be taken out.

[0031] Here, the positive and negative plate groups for testing are clamped in the acid injection placement groove by adjusting the clamping plate, assembled into a battery, and acid is injected for formation. The battery after formation is subjected to performance tests such as cycle life, and the plate in the battery can be taken out at any time by adjusting the clamping plate for testing and analyzing the lead paste composition, AC impedance, etc., so that the lead paste formula with good performance can be easily screened out, and the steps of battery shell glue sealing in conventional battery production can be avoided, saving battery production time. During the battery testing process, it is convenient to remove the plates at different test stages for verification at any time, avoiding the step of disassembling the battery. In addition, the plate produced by the present invention is small in size, which greatly saves the cost of raw materials.

[0032] Preferably, the acid injection placement tank 10 is a U-shaped tank.

[0033] Preferably, the clamping plate 7, the screw rod 8, the nut 9 and the placement groove 10 are all made of polytetrafluoroethylene.

[0034] The present invention also provides a testing method for detecting the performance of lead paste formula of lead-acid battery pole plates. Figure 3 The present invention is a flow chart of a test method for detecting the performance of a lead paste formula for a lead-acid battery plate according to an embodiment of the present invention. The test device is used, and the following steps are included:

[0035] Step 301: Apply equal amounts of positive lead paste and negative lead paste to be tested to the positive grid and negative grid to form positive and negative plates, respectively. The length, width and thickness of the positive plate are 60mm*40mm*5mm-40mm*20mm*3mm, and the length, width and thickness of the negative plate are 60mm*40mm*4mm-40mm*20mm*2mm;

[0036] Preferably, the length, width and thickness of the positive electrode plate are 50mm*30mm*4mm, and the length, width and thickness of the negative electrode plate are 50mm*30mm*3mm;

[0037] Step 302: After the positive electrode plate and the negative electrode plate are cured and dried, wires are welded to the tabs respectively, and the positive and negative electrode plate groups are assembled through a separator, and the positive and negative electrode plate groups are clamped in an acid injection placement tank by adjusting the clamping plate, assembled into a battery, and acid is injected for formation;

[0038] Preferably, the positive and negative plate group may be a 4-positive 5-negative structure, and the acid injection placement groove may be a U-shaped groove;

[0039] Here, the adjusting clamp includes a clamp, a screw and a nut, and the battery middle plate can be taken out at any time through the adjusting clamp for analysis to detect the performance of the lead paste formula of the lead-acid battery plate;

[0040] Here preferably, the adjusting splint and the placement slot are both made of polytetrafluoroethylene;

[0041] Step 303: Performing a performance test on the qualified battery after formation, and taking out the battery middle plate for analysis at any time by adjusting the clamping plate.

[0042] Here, rich liquid test or post-acid extraction test can be performed according to the test requirements.

[0043] Here, the qualified battery can be subjected to performance tests such as cycle life, and the plate in the battery can be taken out at any time by adjusting the clamp to conduct tests and analyses such as lead paste composition and AC impedance, so that a lead paste formula with good performance can be conveniently screened out, and steps such as battery shell glue sealing in conventional battery production can be avoided, thus saving battery production time. During the battery testing process, the plates at different test stages can be conveniently removed at any time for verification, thus avoiding the step of disassembling the battery. In addition, the plates produced by the present invention are smaller in size, thus greatly saving the cost of raw materials.

[0044] The present invention is further described below by listing specific examples for testing the performance of the positive plate lead paste formula:

[0045] Example 1

[0046] Preparation of positive lead paste The positive lead paste formula is as follows: 10.9% deionized water, 9.5% sulfuric acid, 0.05% short fiber, 7% red lead, 0.4% sodium perborate, and the balance is lead powder; prepare the positive lead paste formula materials according to the proportion, put the short fiber, red lead, sodium perborate, and lead powder into a paste machine and dry mix for 5 minutes, add the deionized water and mix for 10 minutes, and finally slowly add the sulfuric acid and mix for at least 15 minutes. After the apparent density of the lead paste meets the requirements, enter the smearing process;

[0047] The negative electrode lead paste adopts the negative electrode lead paste used in production;

[0048] Step 1: Apply the positive lead paste and the negative lead paste to the positive grid and the negative grid in equal amounts to form a positive plate and a negative plate, respectively. The size of the positive plate is 50mm*30mm*4mm, and the size of the negative plate is 50mm*30mm*3mm;

[0049] Step 2: After the positive and negative plates are cured and dried, wires are welded to the tabs respectively, and assembled into a 4-positive and 5-negative plate group through a diaphragm, and the positive and negative plate groups are clamped in an acid injection placement tank by adjusting the clamping plate, assembled into a battery, and acid is injected for formation;

[0050] Step 3: Perform performance test on the qualified battery after formation, and the battery middle plate can be taken out for analysis at any time by adjusting the clamping plate.

[0051] Two identical batteries were manufactured and assembled according to the above method, and cycle life tests were performed on the two batteries respectively. One positive plate in the first battery was taken out at different cycle times for analysis of lead paste composition, and one positive plate in the second battery was taken out at different cycle times for AC impedance test. The corrosion layer resistance was tested to detect the performance of the positive plate lead paste formula. Here, in this Example 1, the corrosion layer resistances tested at cycle 0 and cycle 50 were 28mΩ and 43mΩ, respectively.

[0052] Example 2

[0053] Preparation of positive lead paste The positive lead paste formula is as follows: 10.5% deionized water, 10.3% sulfuric acid, 0.1% short fiber, 6.8% red lead, 0.3% sodium perborate, and the balance is lead powder; prepare the positive lead paste formula materials according to the proportion, put the short fiber, red lead, sodium perborate, and lead powder into a paste machine and dry mix for 5 minutes, add the deionized water and mix for 10 minutes, and finally slowly add the sulfuric acid and mix for at least 15 minutes. After the apparent density of the lead paste meets the requirements, enter the smearing process;

[0054] The negative electrode lead paste adopts the negative electrode lead paste used in production;

[0055] Step 1: Apply the positive lead paste and the negative lead paste to the positive grid and the negative grid in equal amounts to form a positive plate and a negative plate, respectively. The size of the positive plate is 50mm*30mm*4mm, and the size of the negative plate is 50mm*30mm*3mm;

[0056] Step 2: After the positive and negative plates are cured and dried, wires are welded to the tabs respectively, and assembled into a 4-positive and 5-negative plate group through a diaphragm, and the positive and negative plate groups are clamped in an acid injection placement tank by adjusting the clamping plate, assembled into a battery, and acid is injected for formation;

[0057] Step 3: Perform performance test on the qualified battery after formation, and the battery middle plate can be taken out for analysis at any time by adjusting the clamping plate.

[0058] Two identical batteries were manufactured and assembled according to the above method, and cycle life tests were performed on the two batteries respectively. One positive plate in the first battery was taken out at different cycle times for analysis of lead paste composition, and one positive plate in the second battery was taken out at different cycle times for AC impedance test. The corrosion layer resistance was tested to detect the performance of the positive plate lead paste formula. Here, in this Example 1, the corrosion layer resistances tested at cycle 0 and cycle 50 were 34mΩ and 44mΩ, respectively.

[0059] Example 3

[0060] Preparation of positive lead paste The positive lead paste formula is as follows: 11.5% deionized water, 10.5% sulfuric acid, 0.08% short fiber, 7.8% red lead, 0.2% sodium perborate, and the balance is lead powder; prepare the positive lead paste formula materials according to the proportion, put the short fiber, red lead, sodium perborate, and lead powder into a paste machine and dry mix for 5 minutes, add the deionized water and mix for 10 minutes, and finally slowly add the sulfuric acid and mix for at least 15 minutes. After the apparent density of the lead paste meets the requirements, enter the smearing process;

[0061] The negative electrode lead paste adopts the negative electrode lead paste used in production;

[0062] Step 1: Apply the positive lead paste and the negative lead paste to the positive grid and the negative grid in equal amounts to form a positive plate and a negative plate, respectively. The size of the positive plate is 50mm*30mm*4mm, and the size of the negative plate is 50mm*30mm*3mm;

[0063] Step 2: After the positive and negative plates are cured and dried, wires are welded to the tabs respectively, and assembled into a 4-positive and 5-negative plate group through a diaphragm, and the positive and negative plate groups are clamped in an acid injection placement tank by adjusting the clamping plate, assembled into a battery, and acid is injected for formation;

[0064] Step 3: Perform performance test on the qualified battery after formation, and the battery middle plate can be taken out for analysis at any time by adjusting the clamping plate.

[0065] Two identical batteries were manufactured and assembled according to the above method, and cycle life tests were performed on the two batteries respectively. One positive plate in the first battery was taken out at different cycle times for analysis of lead paste composition, and one positive plate in the second battery was taken out at different cycle times for AC impedance test. The corrosion layer resistance was tested to detect the performance of the positive plate lead paste formula. Here, in Example 1, the corrosion layer resistances tested at cycle 0 and cycle 50 were 32mΩ and 41mΩ, respectively.

[0066] In the three embodiments, the positive plates in the batteries with the same number of cycles were respectively taken to perform AC impedance tests to test the corrosion layer resistance. The test results are shown in Table 1:

[0067]

[0068] The corrosion layer resistance affects the conductivity of the corrosion layer of the positive plate and affects the battery charge and discharge reaction. By comparing the above corrosion layer resistance data, it can be seen that the corrosion layer resistance increase of the positive plate of the lead paste formula in Example 3 is the smallest, and the positive plate lead paste formula is relatively good.

[0069] The specific models of the above-mentioned devices are not limited or described in detail, and the in-depth connection methods of the above-mentioned devices are not described in detail. As common knowledge, technicians in this field can understand it.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Therefore, any equivalent changes or modifications made in accordance with the patent scope of the present invention shall fall within the scope of the patent claims of the present invention.

Claims

1. A testing device for detecting the performance of lead paste formula of lead-acid battery plates, comprising a positive and negative plate group for testing, characterized in that: It also includes an adjusting splint and a placement groove for acid injection; the adjusting splint includes a splint, a screw, and a nut; the length, width, and thickness dimensions of the positive plate in the positive and negative plate groups are 60mm*40mm*5mm-40mm*20mm*3mm, and the length, width, and thickness dimensions of the negative plate are 60mm*40mm*4mm-40mm*20mm*2mm; the positive and negative plate groups are placed in the placement groove for acid injection and are clamped or disassembled and taken out by the adjusting splint.

2. A testing device for detecting the performance of lead paste formula of lead-acid battery plates according to claim 1, characterized in that: The positive and negative electrode plate group has a 4-positive and 5-negative structure.

3. A testing device for detecting the performance of lead paste formula of lead-acid battery pole plates according to claim 1, characterized in that: The length, width and thickness of the positive plate in the positive and negative plate groups are 50mm*30mm*4mm, and the length, width and thickness of the negative plate are 50mm*30mm*3mm.

4. A testing device for detecting the performance of lead paste formula of lead-acid battery plates according to claim 1, characterized in that: The acid injection placement groove is a U-shaped groove.

5. A testing device for detecting the performance of lead paste formula of lead-acid battery plates according to claim 1, characterized in that: The clamping plate, screw rod, nut and placement groove are all made of polytetrafluoroethylene.

6. A test method for detecting the performance of lead paste formula of lead-acid battery plates, characterized in that: Using the testing device according to any one of claims 1 to 5 comprises the following steps: Apply equal amounts of the positive lead paste and negative lead paste to be tested to the positive grid and the negative grid to form a positive plate and a negative plate, respectively. The length, width and thickness of the positive plate are 60mm*40mm*5mm-40mm*20mm*3mm, and the length, width and thickness of the negative plate are 60mm*40mm*4mm-40mm*20mm*2mm; After the positive and negative plates are cured and dried, wires are welded to the tabs respectively, and the plates are assembled into positive and negative plate groups through a separator, and the positive and negative plate groups are clamped in an acid injection placement tank by adjusting the clamping plate, assembled into a battery, and acid is injected for formation; The qualified batteries are subjected to performance tests, and the middle plates of the batteries can be taken out for analysis at any time by adjusting the clamping plates.

7. A test method for detecting the performance of lead paste formula of lead-acid battery plates according to claim 6, characterized in that: The positive and negative plate groups are of a 4-positive 5-negative structure; the length, width and thickness dimensions of the positive plate are 50mm*30mm*4mm, and the length, width and thickness dimensions of the negative plate are 50mm*30mm*3mm.

8. A testing method for detecting the performance of lead paste formula of lead-acid battery plates according to claim 6, characterized in that: The acid injection placement groove is a U-shaped groove.

9. A testing method for detecting the performance of lead paste formula of lead-acid battery plates according to claim 6, characterized in that: The adjusting clamp includes a clamp, a screw and a nut. The battery middle plate can be taken out at any time through the adjusting clamp for analysis to detect the performance of the lead paste formula of the lead-acid battery plate.

10. A testing method for detecting the performance of lead paste formula of lead-acid battery plates according to claim 6, characterized in that: The adjusting clamping plate and the placing groove are both made of polytetrafluoroethylene.

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