Charging device for lead-acid storage battery for power

Abstract

The utility model discloses a lead-acid storage battery charging device for power, which comprises an outer shell, a rectangular cavity and a plurality of acid tanks positioned on the same horizontal plane are arranged in the outer shell, and the outer shell is positioned above the acid tanks and communicated with the acid tanks; the side face of the rectangular cavity is communicated and connected with a vacuumizing pipe, an acid injection communicating opening and a gathering opening, the vacuumizing pipe is located at the upper edge of the rectangular cavity, and the acid pumping mechanism is used for recycling redundant acid liquid in the acid tank; and an acid injection pipe communicated with the bottom of the acid tank is arranged at the bottom of the outer shell. According to the utility model, the charging operation can be seamlessly connected after acid addition, the time from acid addition to charging is extremely short, the damage to a polar plate and a shell cover caused by over-high temperature in the battery is effectively avoided, and the performance and the service life of the battery can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead-acid batteries, and in particular relates to a charging device for a power lead-acid battery. Background Art

[0002] Lead-acid batteries are a common type of battery, using lead and lead oxide as electrodes and sulfuric acid as the electrolyte. They operate based on the reaction between lead and sulfuric acid to generate an electric current. Power lead-acid batteries are primarily used in two- and three-wheeled electric vehicles and hold a significant market share.

[0003] The production process of lead-acid batteries includes plate fabrication, assembly, and charging. The conventional charging method involves adding acid to the assembled batteries using a charging machine and then charging. While this charging method is convenient for mass production, it poses challenges such as rapid internal heating of the battery after addition, which can damage the organic additives in the plates and cause the battery casing to bulge if the temperature is too high. After acid addition, the batteries are racked, wired, and charged. This long waiting time in large-scale production leads to a gradual buildup of internal temperatures, ultimately damaging the batteries. Furthermore, because the batteries are individually charged and acidized, the acid content and density vary between cells and from battery to battery. This production process has a greater impact when applied to power lead-acid batteries, which require high consistency, resulting in poor battery performance and poor consistency across battery packs. Utility Model Content

[0004] The present invention aims to solve the problems in the prior art and proposes the following technical solutions:

[0005] A charging device for a power lead-acid battery comprises an outer shell, wherein a rectangular cavity and a plurality of acid tanks located on the same horizontal plane are provided inside the outer shell, and the outer shell is located above the acid tanks and is in communication with the acid tanks;

[0006] The side of the rectangular cavity is interconnected with a vacuum pipe connection port and an acid injection connection port, and the vacuum pipe connection port is located at the upper edge of the rectangular cavity. The filling device also includes an acid extraction mechanism, which is used to recover excess acid in the acid tank and inside the battery;

[0007] The bottom of the outer shell is provided with an acid injection pipe which is connected with the bottom of the acid tank.

[0008] As a preferred embodiment of the above technical solution, a rubber ring is installed on the periphery of the acid injection tube, and the rubber ring matches the acid inlet of the lead-acid battery.

[0009] As a preferred embodiment of the above technical solution, the length of the acid injection tube matches the internal size of the battery, so that after the battery is connected, the acid extraction tube is just above the internal electrode group of the battery, which is convenient for controlling the amount of acid extraction.

[0010] As a preferred embodiment of the above technical solution, the center distance between two adjacent acid tanks is greater than the shell size of the lead-acid battery.

[0011] As a preferred embodiment of the above technical solution, the acid extraction mechanism includes a multi-way tube located in a rectangular cavity, the bottom of the multi-way tube is interconnected with an acid extraction tube extending to the bottom of the acid tank, the aggregation port of the multi-way tube is interconnected with a aggregation tube, and the aggregation tube extends to the outside of the outer shell.

[0012] As a preferred embodiment of the above technical solution, the collecting pipe is installed with a first valve.

[0013] As a preferred embodiment of the above technical solution, a second valve is installed on the acid injection connecting port.

[0014] As a preferred embodiment of the above technical solution, a third valve is installed on the vacuum tube.

[0015] The beneficial effects of the utility model are:

[0016] 1. The acid addition method adopted by this patented system can provide sufficient acid to the battery, avoiding the problem of inconsistent final acid density due to individual battery differences during conventional quantitative acid addition, and also avoiding problems such as acid shortage during the battery formation process;

[0017] 2. In this patent, after the lead-acid battery is docked and the acid injection port and rubber ring are installed, the battery wiring can be carried out before adding acid. When the acid addition is completed, the charging operation can be seamlessly connected. The time from acid addition to charging is extremely short, which effectively avoids damage to the plates and shell cover caused by the temperature rise caused by acid addition, and can effectively improve the battery performance and life;

[0018] 3. This patented method is in a sealed environment during the entire filling process. The acid liquid during the entire filling process will not be released into the environment. No additional acid mist treatment is required to avoid acid hazards to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure shows a front view of the structure of a lead-acid battery charging device for power in an embodiment;

[0020] Figure 2 The figure shows a schematic diagram of the bottom view of a charging device for a lead-acid battery used for power in an embodiment;

[0021] Figure 3 Shown is a top view of the structure of a lead-acid battery charging device for power in an embodiment.

[0022] In the figure: 10, outer shell; 11, rectangular cavity; 12, acid tank; 21, acid injection pipe; 22, rubber ring; 30, acid extraction mechanism; 31, collecting pipe; 32, multi-way pipe; 33, acid extraction pipe; 40, vacuum pipe; 50, acid injection connection port. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0024] Example

[0025] A charging device for a power lead-acid battery includes an outer shell 10, wherein a rectangular cavity 11 and a plurality of acid tanks 12 located on the same horizontal plane are provided inside the outer shell 10, and the outer shell 10 is located above the acid tanks 12 and is in communication with the acid tanks 12;

[0026] The sides of the rectangular cavity 11 are interconnected with a vacuum tube 40 and an acid injection port 50, and the vacuum tube 40 port is located at the upper edge of the rectangular cavity 11. The filling device also includes an acid extraction mechanism 30, which is used to recover excess acid in the acid tank 12.

[0027] The bottom of the outer shell 10 is provided with an acid injection pipe 21 connected to the bottom of the acid tank 12. The battery cooling system is provided below the outer shell 10. The battery cooling system is air-cooled or water-cooled. The periphery of the acid injection pipe 21 is installed with a rubber ring 22, and the rubber ring 22 is matched with the acid inlet of the lead-acid battery.

[0028] The operation process of the charging device of the utility model is as follows:

[0029] a. Connect the acid inlets of the lead-acid batteries one by one to the acid injection pipe 21 at the bottom of the acid tank 12 and seal and fix them through the rubber ring 22; turn on the water cooling or air cooling of the battery; connect the battery to the external charger and discharger;

[0030] b. The acid injection connection port 50 is connected to an external acid supply system, and the acid supply system injects acid into the inner cavity of the rectangular cavity 11, and then falls into the acid tank 12 under the action of gravity, and then is injected into the inner cavity of the battery through the acid injection pipe 21; during injection, the acid liquid level is kept no higher than the height of the connection port between the acid injection connection port 50 and the rectangular cavity 11;

[0031] c. The vacuum tube 40 is connected to an external vacuum device, so that the cavity above the rectangular cavity 11, that is, the cavity above the acid liquid level, forms a negative pressure. This negative pressure extracts the air originally in the battery cavity during the acid injection process, thereby allowing the acid to be injected into the battery more densely;

[0032] d. After repeating steps b and c two or three times, the acid amount is added or reduced through the acid injection connection port 50 and the acid extraction mechanism 30 to make the acid liquid level reach the specified height of the acid tank; when the acid amount is controlled, the charging operation can be carried out seamlessly;

[0033] e. After the battery is charged and discharged, the acid extraction mechanism 30 works to extract the excess acid in the acid tank 12 and the battery.

[0034] Take the power lead-acid battery 12V22Ah as an example,

[0035] Example 1: 8 12V 22Ah sample batteries, using conventional charging process:

[0036] Acid addition: Acid density is 1.252 g / mL, the amount of acid added is 300 g per cell, the acid temperature is 15°C, the air pressure is -80 kPa, vacuum for 15 seconds, open to air for 10 seconds, vacuum for 15 seconds, open to air for 10 seconds;

[0037] After adding acid, the product is put on the shelf according to the conventional assembly line, water cooling is turned on, and then the conventional charging process is started;

[0038] Example 2: 8 12V22Ah sample batteries are charged using this patent:

[0039] Connect the acid inlets of the lead-acid batteries one by one to the acid injection pipes 21 at the bottom of the acid tank 12 and seal and fix them with rubber rings 22; turn on the battery water cooling; and connect the batteries to the external charger and discharger;

[0040] The acid feeding system is connected to the acid injection pipe 50 to provide acid solution with an acid density of 1.252 g / mL and an acid temperature of 15°C to be injected into the rectangular cavity 11 and the acid tank 12, and finally into the battery;

[0041] The vacuum device is connected to the vacuum pipe 40 and starts vacuuming at -80 kPa for 30 seconds, and the air pressure is maintained at 0 kPa for 10 seconds; the above process is repeated two to three times, and the acid amount is added or reduced through the acid injection connection port 50 and the acid extraction mechanism 30 until the acid liquid level reaches 1 / 2 of the height of the acid tank, and then the charging operation is carried out, and finally the acid extraction is carried out;

[0042]

[0043]

[0044] After testing: the sample batteries produced by this patent maintain high consistency in acid density and single-cell acid volume, and their low-temperature performance and life are higher than those of conventional samples.

[0045] Further:

[0046] The center spacing of two adjacent acid tanks 12 is greater than the shell size of lead-acid battery. Overcrowding can be avoided when a plurality of lead-acid batteries and the acid injection pipe 21 docking.

[0047] The acid extraction mechanism 30 includes a multi-way tube 32 located in the rectangular cavity 11. The bottom of the multi-way tube 32 is interconnected with an acid extraction tube 33 extending to the bottom of the acid tank 12. The collection port of the multi-way tube 32 is interconnected with a collection tube 31, and the collection tube 31 extends to the outside of the outer shell 10.

[0048] In step c, the first valve of the manifold 31 and the second valve on the acid injection connection port 50 need to be closed so that the air inside the battery can be better extracted.

[0049] In step e, when the acid extraction mechanism 30 is working, a negative pressure state or a normal pressure state can be set according to demand to better control the amount of acid inside the battery.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A lead-acid battery charging device for power, characterized in that: The invention comprises an outer shell (10), wherein a rectangular cavity (11) and a plurality of acid tanks (12) located on the same horizontal plane are provided inside the outer shell (10), and the outer shell (10) is located above the acid tanks (12) and is in communication therewith; The side surfaces of the rectangular cavity (11) are interconnected with a vacuum tube (40) and an acid injection connection port (50), and the vacuum tube (40) connection port is located at the upper edge of the rectangular cavity (11). The filling device further includes an acid extraction mechanism (30), and the acid extraction mechanism (30) is used to recover excess acid in the acid tank (12); The bottom of the outer shell (10) is provided with an acid injection pipe (21) which is connected to the bottom of the acid tank (12).

2. A power lead-acid battery charging device according to claim 1, characterized in that: A rubber ring (22) is installed on the periphery of the acid injection pipe (21), and the sizes of the acid injection pipe (21) and the rubber ring (22) match the acid inlet of the lead-acid battery.

3. A power lead-acid battery charging device according to claim 1, characterized in that: The center distance between two adjacent acid tanks (12) is greater than the shell size of the lead-acid battery.

4. A lead-acid battery charging device for power according to claim 1, characterized in that: The acid extraction mechanism (30) comprises a multi-way pipe (32) located in the rectangular cavity (11); the bottom of the multi-way pipe (32) is interconnected with an acid extraction pipe (33) extending to the bottom of the acid tank (12); the collection port of the multi-way pipe (32) is interconnected with a collection pipe (31), and the collection pipe (31) extends to the outside of the outer shell (10).

5. A lead-acid battery charging device for power according to claim 4, characterized in that: A first valve is installed on the collecting pipe (31), a second valve is installed on the acid injection communication port (50), and a third valve is installed on the collecting pipe (31).

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