Acid adding device for lead-acid battery

Abstract

The utility model relates to the technical field of lead-acid battery production, and particularly discloses a lead-acid battery acid adding device, the middle part of an acid adding pipe is arranged in a cylindrical acid adding head main body, the upper end and the lower end of the acid adding pipe extend out of the acid adding head main body, the inner wall of the acid adding head main body and the outer wall of the acid adding pipe form an air exhaust channel, the acid adding head main body is of a split structure, the upper end is a cylinder, and the lower end is a cylinder; the lower end of the barrel is provided with a plug body, the barrel is detachably connected with the plug body, a check block is convenient to install, the slidable check block is arranged in the barrel, the check block is cylindrical, a through hole is formed in the middle of the check block and matched with the outer wall of an acid adding pipe, a sealing ring is arranged between the check block and the outer wall of the acid adding pipe, and a sealing ring is arranged between the outer wall of the check block and the inner wall of the barrel. The spring is arranged between the step in the barrel and the check block, the groove in the axis direction is formed in the inner wall of the barrel, the spring pushes the check block to be close to the upper end face of the plug body in the free state, and the upper end face of the check block is lower than the lower end of the groove, so that overflowed sulfuric acid is effectively prevented from entering an inner cavity of the barrel and is prevented from entering air exhaust equipment through the air exhaust nozzle to corrode the air exhaust equipment.

Description

Technical Field

[0001] This utility model relates to the field of lead-acid battery production technology, specifically to a lead-acid battery acid adding device. Background Technology

[0002] Lead-acid batteries are a type of battery widely used in automobiles, electric vehicles, and energy storage systems. During the production process, lead-acid batteries require acid addition. Current methods typically involve using a vacuum acid adding machine to vacuum the battery, which utilizes a vacuum acid adding head. For example, patent publication number "CN205790177U" discloses a vacuum acid adding head, comprising a cylindrical acid adding head body, an acid adding tube, and a sealing head installed at the lower part of the acid adding head body. The middle part of the acid adding tube is located inside the cylindrical acid adding head body, with the upper and lower ends of the acid adding tube... The device has a cylindrical acid-adding head body extending from both ends. The inner wall of the acid-adding head body forms a channel with the outer wall of the acid-adding tube. The acid-adding head body is equipped with a suction nozzle, which is connected to the channel. By setting two channels on the acid-adding head, it can be used for vacuuming and acid-adding operations. The upper part of the channel formed by the inner wall of the acid-adding head body and the outer wall of the acid-adding tube has a cavity, which can be used to temporarily store sulfuric acid that overflows from the battery during vacuuming. However, this device has the following drawback: when the overflowing sulfuric acid enters the cavity and exceeds the cavity capacity, it will enter the suction nozzle and then enter the vacuuming equipment, causing corrosion to components such as vacuum pipes and vacuum pumps. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention provides a lead-acid battery acid-adding device that solves the problem of sulfuric acid overflowing from the battery and entering the vent nozzle during acid addition.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a lead-acid battery acid adding device, including an acid adding head body and an acid adding tube. The acid adding tube is set in the middle of the cylindrical acid adding head body. The upper and lower ends of the acid adding tube extend out of the acid adding head body. The inner wall of the acid adding head body and the outer wall of the acid adding tube form an air extraction channel. The acid adding head body has a split structure, with the upper end being a cylinder and the lower end being a plug. The cylinder and the plug are detachably connected. A slidable stop block is provided inside the cylinder. The stop block is cylindrical and has a through hole in the middle that fits with the outer wall of the acid adding tube. A sealing ring is provided between the stop block and the outer wall of the acid adding tube. A sealing ring is provided between the outer wall of the stop block and the inner wall of the cylinder. A spring is provided between the step inside the cylinder and the stop block. A groove is provided on the inner wall of the cylinder along the axial direction.

[0005] The beneficial effects of this solution are as follows: Compared with the existing technology, the acid dispensing head body is designed as a split structure, which facilitates the installation of springs and stops. By setting the stops, the inner cavity of the acid dispensing head body can be divided into two chambers. When evacuating, the stop slides upward under the action of negative pressure, the spring is compressed, and the airflow is drawn away through the groove on the inner wall of the cylinder. When evacuating stops, the stop slides downward to the stop body under the elastic force of the spring, which can effectively prevent overflowing sulfuric acid from entering the inner cavity of the cylinder and avoid corrosion of the evacuation equipment by entering through the evacuation nozzle.

[0006] Furthermore, the cylinder and the plug are connected by a pipe thread, which facilitates the installation of the spring and the stop block into the cylinder and ensures good airtightness.

[0007] Furthermore, the inner wall of the cylinder has several grooves that are evenly distributed throughout the cylinder, increasing the airflow and improving the vacuuming efficiency.

[0008] Furthermore, the outer wall of the acid addition tube is provided with a frustum, which limits the stop block when it slides upward.

[0009] Furthermore, the sealing ring is made of fluororubber, which has excellent chemical stability and corrosion resistance, and can be prevented from being corroded by sulfuric acid.

[0010] Furthermore, the cylinder is equipped with a vacuum nozzle, which is connected to a vacuum channel and connected to a vacuuming device to evacuate the battery.

[0011] Furthermore, a sealing head is installed at the plug body. When vacuuming and adding acid, the sealing head enters the acid adding port, keeping the acid adding port in a sealed state, which is beneficial for vacuuming. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 Enlarged view of point A;

[0014] Figure 3 This is a schematic diagram of the spring compression according to this utility model;

[0015] In the diagram: 1-Acid addition tube, 2-Cylinder body, 3-Plug body, 4-Stop block, 5-Sealing ring, 6-Spring, 7-Ejector nozzle, 8-Sealing head.

[0016] 11-Groove, 12-Frustum. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Implementation, for example, attached Figures 1 to 3 As shown: A lead-acid battery acid filling device includes an acid filling head body and an acid filling tube 1. The acid filling tube 1 is set in the middle of the cylindrical acid filling head body. The upper and lower ends of the acid filling tube 1 extend out of the acid filling head body. The inner wall of the acid filling head body and the outer wall of the acid filling tube 1 form an air extraction channel. The acid filling head body has a split structure, with a cylinder 2 at the upper end and a plug 3 at the lower end. A slidable stop block 4 is provided inside the cylinder 2. The cylinder 2 and the plug 3 are detachably connected to facilitate the installation of the stop block 4. The stop block 4 is cylindrical and has a through hole in the middle that fits with the outer wall of the acid filling tube 1. A sealing ring 5 is provided between the stop block 4 and the outer wall of the acid filling tube 1. A sealing ring 5 is also provided between the outer wall of the stop block 4 and the inner wall of the cylinder 2. A spring 6 is provided between the step inside the cylinder 2 and the stop block 4. A groove 11 along the axial direction is provided on the inner wall of the cylinder 2. When the spring 6 is in a free state, it pushes the stop block 4 close to the upper end face of the plug 3. The upper end face of the stop block 4 is lower than the lower end of the groove 11.

[0019] The cylinder 2 and the plug 3 are connected by a pipe thread, which facilitates the installation of the spring 6 and the stop 4 into the cylinder 2 and ensures good airtightness. The grooves 11 on the inner wall of the cylinder 2 are numerous and evenly distributed inside the cylinder 2, which increases the air flow and improves the vacuuming efficiency. The outer wall of the acid adding pipe 1 is provided with a frustum 12, which limits the stop 4 when it slides upward. The sealing ring 5 is made of fluororubber, which has excellent chemical stability and corrosion resistance, and can avoid being corroded by sulfuric acid. The cylinder 2 is equipped with a suction nozzle 7, which is connected to the suction channel and is connected to the suction equipment to evacuate the battery. A sealing head 8 is installed at the plug. During vacuuming and acid adding, part of the sealing head 8 enters the acid adding port, so that the acid adding port is in a sealed state, which is beneficial for vacuuming.

[0020] The specific implementation process is as follows: When the spring 6 is in its free state, it pushes the stop block 4 downwards, and the lower end face of the stop block 4 abuts against the upper end face of the plug body 3. The upper end face of the stop block 4 is lower than the lower end of the groove 11. Since the stop block 4 is equipped with sealing rings 5 ​​on both the inner and outer sides, the plug body 3 and the inner cavity of the cylinder 2 are separated by the stop block 4, and air and liquid cannot pass through. When the pumping is started, the upper cavity of the cylinder 2 is first in a negative pressure state. Under the action of negative pressure, the stop block 4 slides upwards, and the spring 6 is pushed and compressed by the stop block 4. When the stop block 4 slides upwards to the frustum 12 of the acid adding tube 1, it is limited. At this time, the outer wall of the stop block 4 is at the inner wall of the cylinder 2. At the groove 11, the air inside the plug 3 and the battery enters the cylinder 2 through the groove 11 and is drawn away by the vacuum device. When the preset vacuum degree is reached, the vacuum device is turned off. The preferred negative pressure value is (-0.08 to -0.1) MPa. At this time, the spring 6 returns to the free state, and the stop block 4 slides down under the elastic force of the spring 6 and abuts against the upper end face of the plug 3, separating the plug 3 from the inner cavity of the cylinder 2. At this time, sulfuric acid is added to the battery through the acid adding tube 1. Due to the obstruction of the stop block 4, even if the sulfuric acid overflows, it will not enter the inner cavity of the cylinder 2, effectively preventing sulfuric acid from entering the vacuum device through the vacuum nozzle 7.

[0021] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lead-acid battery acid-adding device, comprising an acid-adding head body and an acid-adding tube, wherein the acid-adding tube is disposed in the middle of the cylindrical acid-adding head body, and both the upper and lower ends of the acid-adding tube extend out of the acid-adding head body; the inner wall of the acid-adding head body and the outer wall of the acid-adding tube form an air extraction channel, characterized in that: The main body of the acid adding head is a split structure, with a cylinder at the top and a plug at the bottom. The cylinder and the plug are detachably connected. A slidable stop is provided inside the cylinder. The stop is cylindrical and has a through hole in the middle that fits with the outer wall of the acid adding tube. A sealing ring is provided between the stop and the outer wall of the acid adding tube, and a sealing ring is provided between the outer wall of the stop and the inner wall of the cylinder. A spring is provided between the step inside the cylinder and the stop. The inner wall of the cylinder has a groove along the axial direction.

2. The lead-acid battery acid adding device according to claim 1, characterized in that: The cylinder and the plug are connected by a pipe thread.

3. The lead-acid battery acid adding device according to claim 1, characterized in that: The inner wall of the cylinder has several grooves that are evenly distributed throughout the cylinder.

4. The lead-acid battery acid adding device according to claim 1, characterized in that: The outer wall of the acid addition tube is provided with a frustum.

5. The lead-acid battery acid adding device according to claim 1, characterized in that: The sealing ring is made of fluororubber.

6. The lead-acid battery acid adding device according to claim 1, characterized in that: The cylinder is equipped with an air extraction nozzle, which is connected to the air extraction channel.

7. The lead-acid battery acid adding device according to claim 1, characterized in that: A sealing head is installed at the plug body.

Images