A double-jacketed, vibration-resistant valve-regulated lead-acid storage battery

Abstract

The application discloses a double-coated vibration-resistant valve-regulated lead-acid storage battery, which comprises a battery tank and a battery cover, a plurality of single cells are arranged in the battery tank, a pole group is assembled in each single cell, each pole group comprises a plurality of positive plates and a plurality of negative plates, the positive plates and the negative plates are vertically and alternately arranged in parallel, the outer side of the positive plate is coated by an AGM separator, and the outer side of the negative plate is coated by a bag-shaped PE separator; a bottom hot melt adhesive is arranged at the bottom of each single cell, and the bottom of the PE separator is bonded to the bottom of the single cell. The positive plate and the negative plate are double-coated, that is, the positive plate is coated by the AGM separator, and the negative plate is coated by the PE separator; the PE separator and the battery tank made of PP are bonded to be integrated by the bottom hot melt adhesive, so that the bottom of the pole group and the battery tank are bonded to be integrated, and the vibration resistance of the pole group is improved.

Description

Technical Field

[0001] This invention relates to the field of lead-acid battery technology, and in particular to a double-coated, vibration-resistant, valve-regulated sealed lead-acid battery. Background Technology

[0002] Vehicles frequently travel on bumpy, potholed roads, placing stringent demands on the vibration resistance of their parking batteries. Existing flooded batteries use hot melt adhesive to fill the bottom of the electrode group, bonding the separator, plates, and PP battery case into a single integrated structure, resulting in excellent vibration resistance. However, traditional AGM valve-regulated sealed batteries use glass fiber AGM separators to absorb the electrolyte and isolate the positive and negative electrode active materials, which has the following drawbacks: The AGM separator is made of glass fiber, and its structural strength decreases significantly after acid injection, making it impossible to firmly bond to the PP battery case using bottom hot melt adhesive. This causes the electrode group to easily move up and down or left and right within each cell during vehicle bumps, and may even lead to cracking or desoldering of the plates, busbars, and terminals. Summary of the Invention

[0003] The purpose of this invention is to provide a double-coated, vibration-resistant, valve-regulated sealed lead-acid battery. It adopts a double-coating method for positive and negative plates, that is, an AGM separator covers the positive plate and a PE separator covers the negative plate. The PE separator and the PP battery case are bonded together with the bottom hot melt adhesive to form an integral whole, so that the bottom of the electrode group and the battery case are bonded together, thereby improving the vibration resistance of the electrode group.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a double-coated, vibration-resistant, valve-regulated sealed lead-acid battery, comprising a battery case and a battery cover. The battery case contains multiple individual cells, each individual cell being equipped with an electrode group. Each electrode group includes multiple positive plates and multiple negative plates, which are arranged vertically alternately in parallel. The positive plates are covered by an AGM separator, and the negative plates are covered by a pouch-type PE separator. Each individual cell has a bottom hot melt adhesive to bond the bottom of the PE separator to the bottom of the individual cell.

[0006] Preferably, the thickness of the AGM partition is 1.5 mm to 3.0 mm.

[0007] Preferably, the thickness of the PE partition is 0.15 mm to 0.30 mm.

[0008] Preferably, the top of the electrode group is provided with a positive bus and a negative bus, and the positive bus and the negative bus are respectively provided with anti-vibration brackets. The battery cover is provided with a chamber corresponding to each cell, and each chamber is provided with an anti-vibration bracket heat sealing platform that matches the anti-vibration bracket.

[0009] Preferably, hot melt adhesive is applied to the top of the positive and negative busbars to bond the vibration-damping bracket, and the top of the vibration-damping bracket is provided with a heat-sealing plane, which is fixed to the vibration-damping bracket heat-sealing platform by heat sealing.

[0010] Preferably, the electrode group has six poles, which are connected in sequence as a negative pole group, a second pole group, a third pole group, a fourth pole group, a fifth pole group, and a positive pole group. The single cell has six poles and corresponds one-to-one with the six pole groups. A negative pole post is provided on the negative pole group and the negative bus on the negative pole group is welded to the negative pole post. A positive pole post is provided on the positive pole group and the positive bus on the positive pole group is welded to the positive pole post. Other positive and negative buses are connected to the intermediate pole post respectively.

[0011] Preferably, the intermediate pole is welded to the upper end of the other positive and negative busbars of each of the pole groups and aligned with the through-wall weld holes between adjacent cells of the battery compartment. The two intermediate poles of adjacent cells are welded through the through-wall weld holes, so that the six cells are connected in series.

[0012] Preferably, the battery cover has six chambers corresponding to the individual cells, and each chamber has an injection hole in the middle, with a sealing plug threaded into the injection hole.

[0013] Preferably, the inner wall of the injection hole is provided with internal threads, the outer wall of the sealing plug is provided with external threads, and the sealing plug has a built-in safety valve.

[0014] The present invention achieves the following beneficial technical effects compared to the prior art:

[0015] This invention provides a double-coated, vibration-resistant, valve-regulated sealed lead-acid battery. The positive electrode plate is covered by an AGM separator, and the negative electrode plate is covered by a pouch-type PE separator. The PE separator can be firmly bonded to the PP battery case using bottom hot melt adhesive, thus firmly bonding the bottom of the electrode group to the battery case. This solves the problem of traditional pure AGM separators not being able to be hot-melted to the battery case, fixing the bottom of the electrode group and the battery case as a whole, limiting the lateral and longitudinal movement of the electrode group bottom when the vehicle is bumpy. The vibration-damping bracket is erected above the positive and negative busbars, providing support and limiting the vertical upward displacement of the electrode group. This, together with the bottom hot melt adhesive fixing of the battery case bottom, forms a two-way vertical limitation. The positive and negative busbars are bonded to the vibration-damping bracket using top hot melt adhesive, and the vibration-damping bracket is then heat-sealed to the battery cover. The top of the electrode group, the battery cover, and the battery case are completely fused into a rigid whole, further preventing vertical movement of the electrode group and improving vibration resistance. Attached Figure Description

[0016] Figure 1 This is a partial cross-sectional view of the battery in this invention;

[0017] Figure 2This is a top view of the battery compartment in this invention;

[0018] Figure 3 This is a partial cross-sectional view of the battery in this invention, taken along the width direction of the battery, showing the ends where the positive and negative terminals are located.

[0019] Figure 4 This is a schematic diagram of the battery cover structure in this invention;

[0020] In the diagram: 1-Battery slot, 2-Battery cover, 3-Single cell, 4-Positive plate, 5-Negative plate, 6-AGM separator, 7-PE separator, 8-Bottom hot melt adhesive, 9-Positive busbar, 10-Vibration-resistant bracket, 12-Vibration-resistant bracket heat sealing platform, 13-Negative busbar, 14-Negative terminal group, 15-Second terminal group, 16-Third terminal group, 17-Fourth terminal group, 18-Fifth terminal group, 19-Positive terminal group, 20-Negative terminal post, 21-Positive terminal post, 22-Intermediate terminal post, 23-Through-wall welding hole, 24-Cavity, 25-Injection hole, 26-Sealing plug, 27-Safety valve, 28-Positive terminal, 29-Negative terminal. Detailed Implementation

[0021] This invention provides a double-coated, vibration-resistant, valve-regulated sealed lead-acid battery, such as... Figures 1-4 As shown, the battery includes a battery compartment 1 and a battery cover 2. The battery compartment 1 contains multiple individual cells 3, each containing an electrode group. Each electrode group includes multiple positive plates 4 and multiple negative plates 5, arranged vertically alternately in parallel. The positive plates 4 are covered by an AGM separator 6, and the negative plates 5 are covered by a pouch-type PE separator 7. Each individual cell 3 has a bottom hot melt adhesive 8 to bond the bottom of the PE separator 7 to the bottom of the individual cell 3. Specifically, the PE separator 7 can be firmly bonded to the PP battery compartment 1 using the bottom hot melt adhesive 8, thereby firmly bonding the bottom of the electrode group to the battery compartment 1. This solves the defect that traditional pure AGM separators 6 cannot be hot-melted to bond the compartment body, fixing the bottom of the electrode group to the individual cell 3 of the battery compartment 1 as a whole. This restricts the lateral and longitudinal movement of the bottom of the electrode group when the vehicle is bumpy, improving the battery's vibration resistance.

[0022] In addition, the AGM separator 6 has a thickness of 1.5mm to 3.0mm. The AGM separator 6 covers the positive electrode plate 4 and, relying on its porous glass fiber structure, adequately adsorbs and stores electrolyte, meeting the acid supply requirements for the cathode absorption reaction in the valve-regulated sealed battery, thus ensuring the battery's basic capacity and the valve-regulated sealing mechanism. The PE separator 7 has a thickness of 0.15mm to 0.30mm. The pouch-type PE separator 7 has better tensile strength and puncture resistance, effectively inhibiting lead sulfate spikes from piercing the PE separator 7 during battery operation, extending the battery's lifespan. The AGM separator 6 and PE separator 7 isolate the positive and negative electrode active materials respectively, forming a double-layer insulating barrier, improving battery safety and cycle stability.

[0023] Each electrode group has a positive busbar 9 and a negative busbar 13 at its top. Anti-vibration supports 10 are mounted on each of the positive and negative busbars 9 and 13. The battery cover 2 has a chamber 24 corresponding to each individual cell 3. Each chamber 24 has an anti-vibration support heat-sealing platform 12 that matches the anti-vibration support 10. The heat-sealing platforms 12 are positioned on both sides of the corresponding chamber 24 along the length of the battery. Specifically, hot melt adhesive is applied to the top of each positive busbar 9 and negative busbar 13 to bond the anti-vibration support 10. The top of the anti-vibration support 10 has a heat-sealing plane, which is fixed to the heat-sealing platform 12 by heat sealing. The anti-vibration support 10 is erected above the positive and negative busbars 13, providing support and limiting the overall top of the electrode group, constraining the vertical upward displacement of the electrode group, and forming a bidirectional limiting effect with the bottom hot melt adhesive 8 at the bottom of the battery compartment 1, thus improving vibration resistance. The positive and negative busbars 13 are bonded to the vibration-damping bracket 10 with hot melt adhesive on top. The vibration-damping bracket 10 is then heat-sealed to the battery cover 2. The top of the electrode group, the battery cover 2, and the battery compartment 1 are completely fused into a rigid whole, further preventing the electrode group from moving up and down and improving the vibration resistance.

[0024] The battery has six electrode groups, which are connected in sequence as negative electrode group 14, second electrode group 15, third electrode group 16, fourth electrode group 17, fifth electrode group 18, and positive electrode group 19. Each cell 3 includes six electrode groups, which correspond one-to-one with the six electrode groups, matching the standard specifications of a common 12V parking battery. The negative electrode group 14 has a negative terminal post 20, and the negative busbar 13 on the negative electrode group 14 is welded to the negative terminal post 20. The positive electrode group 19 has a positive terminal post 21, and the positive busbar 9 on the positive electrode group 19 is welded to the positive terminal post 21. The other positive busbars 9 and negative busbars 13 are connected to the intermediate terminal post 22. The positive terminal post 21 has a positive terminal 28, and the negative terminal post 20 has a negative terminal 29, so as to facilitate connection with external electrical components. The intermediate pole 22 is welded to the upper end of the other positive busbars 9 and negative busbars 13 of each pole group, and aligned with the through-wall welding hole 23 between adjacent cells 3 of the battery compartment 1. The two intermediate poles 22 of adjacent cells 3 are welded through the through-wall welding hole 23, so that the six cells 3 are connected in series to realize the battery function.

[0025] The battery cover 2 has six chambers 24 corresponding to individual cells 3. Each chamber 24 has an injection hole 25 in the center, and a sealing plug 26 is internally threaded into the injection hole 25. Specifically, the inner wall of the injection hole 25 has internal threads, and the outer wall of the sealing plug 26 has external threads. A safety valve 27 is built into the sealing plug 26. Each individual cell 3 corresponds to an independent injection hole 25. During acid injection, the amount of acid added to each individual cell 3 can be controlled individually to ensure uniform electrolyte capacity in the six individual cells 3 and avoid inconsistent capacity decay of the entire battery pack due to differences in acid content in individual cells 3. When the battery is charging and gas is generated, the safety valve 27 automatically opens to release pressure and automatically closes under negative pressure to maintain the oxygen circulation cathode absorption reaction inside the battery.

[0026] This invention has illustrated its principles and implementation methods using specific examples. The descriptions of these embodiments are merely illustrative of the method and its core ideas; furthermore, those skilled in the art will recognize that modifications may be made to the specific implementation methods and application scope based on the principles of this invention. Therefore, the content of this specification should not be construed as limiting the invention.

Claims

1. A double-coated, vibration-resistant, valve-regulated sealed lead-acid battery, comprising a battery case and a battery cover, wherein the battery case contains multiple individual cells, each individual cell is equipped with an electrode group, each electrode group includes multiple positive plates and multiple negative plates, the positive plates and negative plates being arranged vertically alternately in parallel, characterized in that: The positive electrode plate is covered by an AGM separator, and the negative electrode plate is covered by a bag-type PE separator. The bottom of each cell is provided with bottom hot melt adhesive so that the bottom of the PE separator is bonded to the bottom of the cell.

2. The double-coated vibration-resistant valve-regulated sealed lead-acid battery according to claim 1, characterized in that: The thickness of the AGM partition is 1.5 mm to 3.0 mm.

3. The double-coated vibration-resistant valve-regulated sealed lead-acid battery according to claim 1, characterized in that: The thickness of the PE partition is 0.15mm to 0.30mm.

4. The double-coated vibration-resistant valve-regulated sealed lead-acid battery according to claim 1, characterized in that: The top of the electrode group is provided with a positive bus and a negative bus, and each of the positive bus and the negative bus is provided with an anti-vibration bracket. The battery cover is provided with a chamber corresponding to each cell, and each chamber is provided with an anti-vibration bracket heat sealing platform that matches the anti-vibration bracket.

5. The double-coated vibration-resistant valve-regulated sealed lead-acid battery according to claim 4, characterized in that: The top of the positive and negative busbars is coated with hot melt adhesive to bond the vibration damping bracket. The top of the vibration damping bracket is provided with a heat-sealing plane, which is fixed to the vibration damping bracket heat-sealing platform by heat sealing.

6. The double-coated vibration-resistant valve-regulated sealed lead-acid battery according to claim 1, characterized in that: The electrode group has six poles, which are connected in sequence as a negative pole group, a second pole group, a third pole group, a fourth pole group, a fifth pole group, and a positive pole group. The single cell has six poles and corresponds one-to-one with the six pole groups. A negative pole post is provided on the negative pole group and the negative bus on the negative pole group is welded to the negative pole post. A positive pole post is provided on the positive pole group and the positive bus on the positive pole group is welded to the positive pole post. Other positive and negative buses are connected to the intermediate pole post respectively.

7. The double-coated vibration-resistant valve-regulated sealed lead-acid battery according to claim 6, characterized in that: The intermediate pole is welded to the upper end of the other positive and negative busbars of each pole group and aligned with the through-wall weld hole between adjacent cells of the battery compartment. The two intermediate poles of adjacent cells are welded through the through-wall weld hole, so that the six pole groups are connected in series.

8. The double-coated vibration-resistant valve-regulated sealed lead-acid battery according to claim 1, characterized in that: The battery cover has six chambers corresponding to the individual cells, and each chamber has an injection hole in the middle, with a sealing plug threaded into the injection hole.

9. The double-coated vibration-resistant valve-regulated sealed lead-acid battery according to claim 8, characterized in that: The inner wall of the injection hole is provided with internal threads, the outer wall of the sealing plug is provided with external threads, and the sealing plug has a built-in safety valve.

Images