Device for testing assembling pressure of lead storage battery

Abstract

The utility model discloses a device for testing the assembling pressure of a lead storage battery, which comprises a front cover, a rear cover and at least one group of middle baffle plates arranged between the front cover and the rear cover, each middle baffle plate is provided with a through mounting port, a pole group is arranged between the front cover and the rear cover and penetrates through the mounting port, and the pole group is arranged in the mounting port. The top of the front cover and the top of the rear cover are respectively provided with a through hole for insertion of a terminal, the front cover and the rear cover are close to each other through gradual tightening of the locking piece, and assembly pressure applied to a pole group clamped between the front cover and the rear cover is increased accordingly. The pressure can be transmitted to the detection surface of the piezoelectric ceramic pressure sensor, the piezoelectric ceramic pressure sensor detects the assembling pressure borne by the pole group, meanwhile, the assembling pressure of the pole group can be controlled according to requirements, performance testing of a plurality of pole groups can be carried out at a time, and the testing device is short in testing time, convenient to operate and high in repeatability.

Description

Technical Field

[0001] This utility model relates to the field of lead-acid battery technology, and in particular to a device for testing the assembly pressure of lead-acid batteries. Background Technology

[0002] Lead-acid batteries are characterized by high voltage, low cost, good high-rate discharge performance, good resistance to high and low temperatures, ease of float charging, and high safety. Therefore, they are widely used in lighting, starting, energy storage, and as backup power for communications. The main structure of a single electrode group in a lead-acid battery consists of a positive plate, a negative plate, and a separator. When the electrode group is installed into the battery casing, a certain assembly pressure is generated, which has a certain impact on the battery. During battery operation, the assembly pressure also changes due to the continuous changes in lead paste crystals. Therefore, there is an urgent need for a device to test the assembly pressure of lead-acid batteries to determine the optimal assembly pressure of the battery electrode group. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0004] A device for testing the assembly pressure of a lead-acid battery includes a front cover, a rear cover, and at least one set of intermediate baffles disposed between the front cover and the rear cover. Each intermediate baffle has a through mounting opening. An electrode group is disposed between the front cover and the rear cover, passing through the mounting opening. Both the front cover and the rear cover have through holes at their tops for inserting terminals, which pass through the through holes and connect to the electrode group. Both the front cover and the rear cover have two sets of mounting holes. A piezoelectric ceramic pressure sensor is disposed within each mounting hole, with its pressure detection surface contacting the electrode group. A locking element is disposed between the front cover and the rear cover, and adjusting the locking element controls the assembly pressure of the front cover and the rear cover on the electrode group.

[0005] As an improvement to the above technical solution, the electrode group includes multiple sets of positive electrode plates, multiple sets of negative electrode plates, and multiple sets of separators. The separators are disposed between the positive electrode plates and the negative electrode plates. Positive electrode tabs and negative electrode tabs are respectively disposed at the top edges of the positive electrode plates and the negative electrode plates. The multiple sets of positive electrode plates are welded together to form a positive electrode busbar through the positive electrode tabs, and the multiple sets of negative electrode plates are welded together to form a negative electrode busbar through the negative electrode tabs. The positive electrode busbar is electrically connected to two sets of terminals through positive electrode butt welding parts, and the negative electrode busbar is electrically connected to two sets of terminals through negative electrode butt welding parts.

[0006] As an improvement to the above technical solution, the locking component includes a bolt that passes through the front cover, the middle baffle and the rear cover, and both ends of the bolt are threaded with nuts.

[0007] As an improvement to the above technical solution, rubber rings are provided on the opposite sides of the front cover and the rear cover, as well as on the side of the middle baffle.

[0008] The beneficial effects of this utility model are:

[0009] As the locking mechanism gradually tightens, the front and rear covers move closer together, increasing the assembly pressure on the electrode group sandwiched between them. When the electrode group is subjected to the assembly pressure from the front and rear covers, the pressure is transmitted to the detection surface of the piezoelectric ceramic pressure sensor. The piezoelectric ceramic pressure sensor detects the magnitude of the assembly pressure borne by the electrode group. At the same time, the assembly pressure of the electrode group can be controlled as needed, and multiple electrode group performance tests can be performed at the same time. This testing device has a short testing time, is easy to operate, and has strong repeatability. Attached Figure Description

[0010] Figure 1 This is a partial sectional view of the overall structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the intermediate baffle of this utility model.

[0013] Reference numerals: 1. Front cover; 2. Piezoelectric ceramic pressure sensor; 3. Terminal; 4. Rubber ring; 5. Bolt; 6. Intermediate baffle; 7. Rear cover; 8. Positive electrode plate; 9. Separator; 10. Negative electrode plate. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 utility model and are not intended to limit the present utility model.

[0015] A device for testing the assembly pressure of a lead-acid battery includes a front cover 1, a rear cover 7, and at least one set of intermediate baffles 6 disposed between the front cover 1 and the rear cover 7. The intermediate baffles 6 have a through mounting opening. An electrode group is disposed between the front cover 1 and the rear cover 7 and passes through the mounting opening. The top of both the front cover 1 and the rear cover 7 has through holes for inserting terminals 3. The terminals 3 pass through the through holes and connect to the electrode group. Both the front cover 1 and the rear cover 7 have two sets of mounting holes. A piezoelectric ceramic pressure sensor 2 is disposed in the mounting holes. The pressure detection surface of the piezoelectric ceramic pressure sensor 2 contacts the electrode group. A locking member is disposed between the front cover 1 and the rear cover 7. Adjusting the locking member controls the assembly pressure of the front cover 1 and the rear cover 7 on the electrode group.

[0016] First, at least one set of intermediate baffles 6 is placed between the front cover 1 and the rear cover 7. Then, the electrode group is inserted into the mounting port. The front cover 1 and the rear cover 7 are used to limit the electrode group. The distance between the front cover 1 and the rear cover 7 is changed by adjusting the locking member between them. As the locking member gradually tightens, the front cover 1 and the rear cover 7 move closer to each other, and the assembly pressure applied to the electrode group sandwiched between them increases. When the electrode group is subjected to the assembly pressure applied by the front cover 1 and the rear cover 7, the pressure is transmitted to the detection surface of the piezoelectric ceramic pressure sensor 2. The piezoelectric material inside the piezoelectric ceramic pressure sensor 2 will generate charge change due to the force, converting the mechanical pressure signal into an electrical signal in real time, thereby accurately measuring the assembly pressure on the electrode group. Conversely, when the locking member is loosened, the assembly pressure decreases. Throughout the adjustment process, the piezoelectric ceramic pressure sensor 2 continuously provides pressure data, allowing for control of the electrode assembly pressure as needed. Multiple battery performance tests can be performed simultaneously. Depending on the battery model, the number and thickness of the positive and negative plates and separators used in the electrode assembly vary. Different separators can be used to appropriately adjust the electrode assembly thickness. Then, corresponding intermediate baffles are used to jointly adjust the assembly pressure. If the electrode assembly thickness exceeds the thickness of a single intermediate baffle, the number of baffles can be increased. The front cover, intermediate device, and rear cover are made of ABS, a material resistant to acid.

[0017] In one embodiment, reference Figure 2 The electrode group includes multiple sets of positive electrode plates 8, multiple sets of negative electrode plates 10, and multiple sets of separators 9. The separators 9 are disposed between the positive electrode plates 8 and the negative electrode plates 10. Positive electrode tabs and negative electrode tabs are respectively provided at the top edges of the positive electrode plates 8 and the negative electrode plates 10. The multiple sets of positive electrode plates 8 are welded together to form a positive electrode busbar, and the multiple sets of negative electrode plates 10 are welded together to form a negative electrode busbar. The positive electrode busbar is distributed through positive electrode butt welding components, and the negative electrode busbar is distributed through negative electrode butt welding components. Do not electrically connect to the two sets of terminals. The partition 9 isolates the positive plate 8 and the negative plate 10 to prevent short circuits, while allowing ions in the electrolyte to pass freely to ensure the electrochemical reaction. The positive and negative tabs connect the positive plates 8 and the negative plates 10. The current generated by each positive plate 8 is collected into the positive busbar through the positive tab, and the current generated by each negative plate 10 is collected into the negative busbar through the negative tab, thus providing sufficient power to the external circuit.

[0018] In one embodiment, reference Figure 1The locking mechanism includes bolts 5 that pass through the front cover 1, the intermediate baffle 6, and the rear cover 7. Both ends of the bolts 5 are threaded with nuts. When it is necessary to adjust the assembly pressure of the front cover 1 and the rear cover 7 on the electrode group, the nuts are rotated. As the nuts are continuously screwed into the bolts 5, the nuts will gradually apply inward compressive force to the front cover 1 and the rear cover 7, causing the front cover 1 and the rear cover 7 to move closer to each other along the axial direction of the bolts 5, thereby generating greater assembly pressure on the electrode group sandwiched between them. When it is necessary to reduce the assembly pressure, simply loosen the nuts in the opposite direction. The distance between the front cover 1 and the rear cover 7 will increase appropriately under the action of factors such as the elasticity of the electrode group itself, thereby reducing the assembly pressure borne by the electrode group accordingly. This testing device has a short testing time, is easy to operate, and has strong repeatability.

[0019] In one embodiment, reference Figure 1 Rubber rings 4 are provided on the opposite side of the front cover 1 and the rear cover 7, as well as on the side of the middle baffle 6. When the electrode group is placed in the space enclosed by the front cover 1, the middle baffle 6 and the rear cover 7, the rubber rings 4 can fill the tiny gaps between the components and effectively prevent the electrolyte and other substances inside the battery from seeping out from the gaps.

[0020] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A device for testing the assembly pressure of a lead storage battery, characterized in that The application relates to a battery cover, which comprises a front cover (1), a rear cover (7) and at least one group of intermediate baffles (6) arranged between the front cover (1) and the rear cover (7), wherein the intermediate baffles (6) are provided with through installation openings, a pole group is arranged between the front cover (1) and the rear cover (7) and penetrates the installation openings, the top of the front cover (1) and the top of the rear cover (7) are provided with through holes for inserting terminals (3), the terminals (3) are connected with the pole group through the through holes, the front cover (1) and the rear cover (7) are provided with two groups of installation holes, piezoelectric ceramic pressure sensors (2) are arranged in the installation holes, the pressure detection surface of the piezoelectric ceramic pressure sensors (2) is in contact with the pole group, locking members are arranged between the front cover (1) and the rear cover (7), and the locking members are adjusted to control the assembly pressure of the front cover (1) and the rear cover (7) on the pole group.

2. A device for testing the assembly pressure of lead storage batteries according to claim 1, characterized in that: The pole group comprises a plurality of groups of positive plates (8), a plurality of groups of negative plates (10) and a plurality of groups of separators (9), the separators (9) are arranged between the positive plates (8) and the negative plates (10), positive tabs and negative tabs are respectively arranged at the top edges of the positive plates (8) and the negative plates (10), a plurality of groups of the positive plates (8) are welded into a positive bus bar through the positive tabs, a plurality of groups of the negative plates (10) are welded into a negative bus bar through the negative tabs, the positive bus bar is electrically connected with two groups of terminals (3) through positive butt welding members, and the negative bus bar is electrically connected with the two groups of terminals (3) through negative butt welding members.

3. A device for testing the assembly pressure of lead storage batteries according to claim 2, characterized in that: The locking members comprise bolts (5) penetrating the front cover (1), the intermediate baffles (6) and the rear cover (7), and nuts are threadedly sleeved on both ends of the bolts (5).

4. A device for testing the assembly pressure of lead storage batteries according to claim 1, characterized in that: The opposite side of the front cover (1) and the rear cover (7) and the side surface of the intermediate baffles (6) are provided with rubber rings (4).

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