Acid mist backflow device in lead storage battery formation process

Abstract

The invention belongs to the technical field of lead storage battery manufacturing, and discloses an acid mist backflow device in a lead storage battery formation process, the acid mist backflow device comprises a storage battery body and a backflow shell, an inner cavity of the backflow shell is provided with a plurality of groups of first condensation sheets and a plurality of groups of second condensation sheets, and the plurality of groups of first condensation sheets and the plurality of groups of second condensation sheets are alternately arranged in a staggered manner; a top cover is arranged at the upper end of the backflow shell in a sealed mode, impact force of downward flowing can be buffered through the first condensation piece and the second condensation piece when electrolyte is injected, an AGM partition plate in a storage battery is prevented from being damaged by impact of the electrolyte, meanwhile, generated acid mist floats upwards, the acid mist is condensed through the first condensation piece and the second condensation piece in sequence, and therefore the acid mist is condensed. Furthermore, the acid mist falls back into the storage battery body under the action of gravity, so that the discharge amount of acid mist is reduced, environmental protection is facilitated, meanwhile, the formation efficiency in the storage battery can be improved, the consumption of dilute sulfuric acid electrolyte is reduced, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of lead-acid battery manufacturing, and in particular relates to an acid mist reflux device in a lead-acid battery formation process. Background Art

[0002] In the manufacturing process of lead-acid batteries, a key process is formation. After the plates are loaded into the battery slot and the battery cover is sealed, dilute sulfuric acid electrolyte is injected from the injection hole on the top of the battery cover, and then direct current is passed. After the charging and discharging cycle, the dry lead paste on the plates is converted into active substances. There are two types of plates loaded into the battery slot: one is the plate that has been cured and dried, called the green plate; the other is the plate that has been formed in a special formation tank to convert the dry lead paste into active substances and dried, called the cooked plate;

[0003] The traditional battery production process is to load the cooked plates into the battery slot and then perform the initial charging. The cooked plates inside the battery slot are activated to become a fully charged battery. This production process is called externalization. In order to meet the national environmental protection requirements, battery manufacturers have transformed the traditional externalization production process into an internalization production process, that is, directly loading the green plates into the battery slot. After a long period of charging and discharging cycles, the dry paste on the plates is converted into active substances, thereby achieving the purpose of fully charging the battery.

[0004] However, the internal formation process has a big drawback, that is, during the formation process, a large amount of acid mist is precipitated from the inside of the battery through the injection hole on the top of the battery cover. The acid mist generated during the formation of the cooked plate battery is only 2%-5%, while the acid mist generated by the internal formation process is 18%-21%. The release of the mist acid into the atmosphere will cause pollution to the environment.

[0005] To this end, we propose an acid mist reflux device in the formation process of a lead-acid battery to solve the problems existing in the prior art. By adding a reflux device, it is convenient to inject the electrolyte, and the precipitated mist acid can be recovered, so that the acid mist generated by the internal formation process can be reduced to 5% to 8%, thereby reducing acid mist emissions, which is beneficial to environmental protection. At the same time, it can improve the efficiency of the internal formation of the battery, reduce the consumption of dilute sulfuric acid electrolyte, and reduce costs. Summary of the invention

[0006] The object of the present invention is to provide an acid mist reflux device in the formation process of a lead-acid battery, so as to solve the problem that in the prior art, a large amount of acid mist is separated out from the inside of the battery through the injection hole on the top of the battery cover during the formation process, the acid mist generated in the formation process of the cooked plate battery is only 2%-5%, while the acid mist generated in the internal formation process is 18%-21%, and the mist acid is released into the atmosphere and causes pollution to the environment.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A device for reflux of acid mist in the formation process of a lead-acid battery comprises a battery body and a reflux shell, the inner cavity of the reflux shell is provided with a plurality of groups of first condensing sheets and a plurality of groups of second condensing sheets, the plurality of first condensing sheets and the plurality of second condensing sheets are alternately arranged in an offset manner, the extension lines of the first condensing sheets and the extension lines of the second condensing sheets are both arranged to intersect with a horizontal plane, the upper end of the reflux shell is sealed with a top cover, the upper surface of the top cover is provided with a first injection pipe, the lower end of the reflux shell is sealed with a collecting cover, the lower end of the collecting cover is provided with a reflux pipe, the upper surface of the battery body is provided with a second injection pipe, a sealing assembly is provided between the reflux pipe and the second injection pipe, and scraper assemblies for acid mist reflux are installed on both sides of the reflux shell.

[0009] Preferably, multiple groups of the first condensing plates are arranged at equal intervals, multiple groups of the second condensing plates are arranged at equal intervals, and the lower surface of the top cover is provided with a buffer drainage plate located below the first injection pipe.

[0010] Preferably, a buffer cavity is formed between the buffer drainage plate, the multiple groups of first condensing sheets and the multiple groups of second condensing sheets, and the buffer cavity is arranged in a serpentine shape.

[0011] Preferably, the sealing assembly comprises a sealing rubber sleeve, the inner cavity of the sealing rubber sleeve is provided with a docking sealing inner ring for isolating the reflux pipe and the second injection pipe, and the outer diameter of the reflux pipe is the same as the outer diameter of the second injection pipe.

[0012] Preferably, two groups of limiting outer rings are symmetrically arranged on the outer side of the sealing rubber sleeve, a mounting portion is arranged between the two groups of limiting outer rings, and a locking hoop is arranged on the outer side of the mounting portion.

[0013] Preferably, both ends of the locking hoop are fixedly connected with protrusions, and one side of the two groups of protrusions are threadedly connected with locking screws.

[0014] Preferably, the scraper assembly includes a support drive member and a scraper member connected by the support drive member, and both sides of the reflux shell are provided with inclined side holes for the scraper member to slide and insert, and multiple groups of the inclined side holes are arranged in a rectangular array.

[0015] Preferably, the support driving member comprises a support plate, a forward and reverse motor is mounted on the upper surface of the support plate, and an output shaft of the forward and reverse motor is transmission-connected to a reciprocating screw rod.

[0016] Preferably, the scraper member includes a connecting plate, a threaded sleeve threadedly connected to the reciprocating screw is fixedly connected to the lower end of one side of the connecting plate, and multiple groups of plug rods are fixedly connected to the other side of the connecting plate, one end of two adjacent groups of plug rods passes through the reflux shell and is fixedly connected to a scraper, and the scraper is slidably connected to the lower surfaces of the first condensation plate and the second condensation plate.

[0017] Preferably, a support rod is fixedly connected to the lower surface of the support plate, and a plurality of groups of the inclined side holes are each sleeved with a sealing sleeve located on the outside of the insertion rod.

[0018] The acid mist reflux device in the formation process of a lead-acid battery proposed by the present invention has the following advantages compared with the prior art:

[0019] 1. The present invention cooperates with the reflux housing, the first condensing sheet, the second condensing sheet and the sealing assembly. The first condensing sheet and the second condensing sheet can buffer the impact force of the downward flow of the electrolyte during injection, thereby preventing the impact of the electrolyte from damaging the AGM separator inside the battery. At the same time, the acid mist generated floats upward, and is successively condensed by the first condensing sheet and the second condensing sheet, and then the mist acid falls back into the battery body under the action of gravity, thereby reducing the emission of acid mist, which is beneficial to environmental protection. At the same time, the efficiency of the internal formation of the battery can be improved, the consumption of dilute sulfuric acid electrolyte can be reduced, and the cost can be reduced;

[0020] 2. The sealing assembly of the present invention is arranged so that the sealing rubber sleeve can quickly connect the reflux pipe with the second injection pipe, so that the electrolyte can be injected into the battery body and the condensed acid mist can be refluxed. At the same time, the locking hoop is arranged in the mounting part, and the two groups of protrusions are locked by the locking screw, so that the locking hoop locks the sealing rubber sleeve, thereby improving the sealing performance between the reflux pipe, the second injection pipe and the sealing rubber sleeve;

[0021] 3. Through the setting of the scraper assembly of the present invention, the forward and reverse motors drive the threaded sleeve, the threaded sleeve drives the connecting plate to move, and the connecting plate drives the scraper to slide on the lower surfaces of the first condensing sheet and the second condensing sheet through the insertion rod, thereby facilitating the scraping of the acid mist on the lower surfaces of the first condensing sheet and the second condensing sheet, so as to facilitate the recovery of the acid mist and reduce the waste of electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the reflux housing of the present invention;

[0025] Figure 4 It is a schematic diagram of the sealing assembly structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the scraper assembly of the present invention.

[0027] In the figure: 1. battery body; 2. sealing assembly; 21. sealing rubber sleeve; 22. docking sealing inner ring; 23. limiting outer ring; 24. locking hoop; 25. bump; 26. locking screw; 27. mounting part; 3. reflux shell; 4. top cover; 5. first injection pipe; 6. collecting cover; 7. reflux pipe; 8. inclined side hole; 9. sealing sleeve; 10. buffer chamber; 11. buffer drainage plate; 12. first condensing plate; 13. second condensing plate; 14. second injection pipe; 15. scraper assembly; 151. support plate; 152. forward and reverse motor; 153. reciprocating screw; 154. connecting plate; 155. threaded sleeve; 156. scraper; 1561. plug rod; 1562. scraper; 157. support rod. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention provides Figure 1-5 The acid mist reflux device in the formation process of a lead-acid battery shown in the figure comprises a battery body 1 and a reflux shell 3, the inner cavity of the reflux shell 3 is provided with multiple groups of first condensing sheets 12 and multiple groups of second condensing sheets 13, the multiple groups of first condensing sheets 12 and multiple groups of second condensing sheets 13 are staggered and alternately arranged, the extension lines of the first condensing sheets 12 and the extension lines of the second condensing sheets 13 are both arranged to intersect with the horizontal plane, the upper end of the reflux shell 3 is sealed with a top cover 4, the upper surface of the top cover 4 is provided with a first injection pipe 5, the lower end of the reflux shell 3 is sealed with a collecting cover 6, the lower end of the collecting cover 6 is provided with a reflux pipe 7, the upper surface of the battery body 1 is provided with a second injection pipe 14, a sealing assembly 2 is provided between the reflux pipe 7 and the second injection pipe 14, and scraper assemblies 15 for acid mist reflux are installed on both sides of the reflux shell 3, the battery body 1 is a battery formation of a lead-acid battery 6-DZF-20 for an electric vehicle, and the capacity of the lead-acid battery is 20Ah.

[0030] Multiple groups of first condensing sheets 12 are arranged at equal intervals, and multiple groups of second condensing sheets 13 are arranged at equal intervals. The lower surface of the top cover 4 is provided with a buffer drainage plate 11 located below the first injection pipe 5, which can buffer the injection of electrolyte and improve the service life of the reflux device. The reflux shell 3, multiple groups of first condensing sheets 12 and multiple groups of second condensing sheets 13 are all made of PC material, which has high strength characteristics and can withstand vacuum negative pressure exceeding 2.0KPa. It is transparent and the real-time status inside the device can be observed. The capacity of the reflux shell 3 is set to 15-20 times the capacity of the battery body 1.

[0031] A buffer chamber 10 is formed between the buffer drain plate 11, multiple groups of first condensing sheets 12 and multiple groups of second condensing sheets 13. The buffer chamber 10 is arranged in a serpentine shape to increase the residence time of the electrolyte in the reflux shell 3. There is a downward impact force during the injection of dilute sulfuric acid electrolyte. This impact force is blocked by multiple layers of multiple groups of first condensing sheets 12 and multiple groups of second condensing sheets 13. In this way, when it reaches the inside of the battery, the impact force is almost reduced to zero, thereby avoiding damage to the AGM separator inside the battery.

[0032] The sealing assembly 2 includes a sealing rubber sleeve 21. The inner cavity of the sealing rubber sleeve 21 is provided with a docking sealing inner ring 22 for isolating the return pipe 7 and the second injection pipe 14. The outer diameter of the return pipe 7 is the same as the outer diameter of the second injection pipe 14. The sealing rubber sleeve 21 has sufficient elasticity and super corrosion resistance, thereby improving the service life.

[0033] Two groups of limiting outer rings 23 are symmetrically arranged on the outer side of the sealing rubber sleeve 21, and an installation portion 27 is arranged between the two groups of limiting outer rings 23. A locking hoop 24 is arranged on the outer side of the installation portion 27. The limiting rings can prevent the locking hoop 24 from being installed incorrectly. At the same time, the locking hoop 24 can be quickly locked to the sealing rubber sleeve 21 through the installation portion 27.

[0034] Both ends of the locking hoop 24 are fixedly connected with protrusions 25, and one side of the two groups of protrusions 25 is threadedly connected with locking screws 26, which improve the stability of the installation of the sealing rubber sleeve 21 and the return pipe 7 and the second injection pipe 14.

[0035] The scraper assembly 15 includes a supporting drive member and a scraper member 156 connected by a transmission through the supporting drive member. Both sides of the reflux shell 3 are provided with inclined side holes 8 for the scraper member 156 to slide and insert. A plurality of groups of inclined side holes 8 are arranged in a rectangular array. The supporting drive member can be used to speed up the moving efficiency of the scraper member 156, thereby speeding up the scraping efficiency of the condensed acid mist and improving the reflux efficiency of the acid mist.

[0036] The supporting driving member includes a supporting plate 151, and a forward and reverse motor 152 is installed on the upper surface of the supporting plate 151. The output shaft of the forward and reverse motor 152 is connected to a reciprocating screw rod 153. The reciprocating screw rod 153 is driven by the forward and reverse motor 152 to drive the threaded sleeve 155 to reciprocate, thereby accelerating the scraping efficiency of the acid mist.

[0037] The scraper 156 includes a connecting plate 154, a threaded sleeve 155 threadedly connected to the reciprocating screw 153 is fixedly connected to the lower end of one side of the connecting plate 154, and a plurality of groups of plug rods 1561 are fixedly connected to the other side of the connecting plate 154, one end of two adjacent groups of plug rods 1561 penetrates the reflux shell 3 and is fixedly connected to a scraper 1562, and the scraper 1562 is slidably connected to the lower surface of the first condensing sheet 12 and the second condensing sheet 13. The reciprocating movement of the scraper 1562 is used to scrape off the acid mist on the lower surface of the first condensing sheet 12 and the second condensing sheet 13, thereby facilitating the recovery of the electrolyte, reducing the cost of using the electrolyte, and reducing the amount of acid mist released into the atmosphere.

[0038] A support rod 157 is fixedly connected to the lower surface of the support plate 151, and a plurality of sets of inclined side holes 8 are each provided with a sealing sleeve 9 located on the outside of the insertion rod 1561. The support rod 157 improves the stability of starting the forward and reverse motor 152 on the support plate 151, and the sealing sleeve 9 can improve the sealing between the insertion rod 1561 and the reflux housing 3.

[0039] When in use, the first injection pipe 5 is connected through an external vacuum injection machine, the vacuum injection machine generates a vacuum, extracts the gas inside the battery body 1 (and weighs the weight of the battery), and then injects the dilute sulfuric acid electrolyte into the first injection pipe 5. The electrolyte first passes through the buffer drainage plate 11, and then alternately passes through the buffer cavity 10 formed between the multiple groups of first condensing sheets 12 and the multiple groups of second condensing sheets 13, thereby reducing the impact force of the electrolyte, so that the electrolyte with reduced impact force passes through the reflux pipe 7 and the sealing component 2 and then is injected into the battery body 1 through the second injection pipe 14. After the injection is completed (the battery is weighed again), the injection amount of the electrolyte is obtained;

[0040] The formation is carried out according to the process regulations. After a long period of charge and discharge cycle, the dry paste on the plate is converted into active substances. During the formation process, the forward and reverse motor 152 is started to drive the reciprocating screw rod 153 to drive the threaded sleeve 155 to move back and forth, so that the connecting plate 154 drives the scraper 1562 through the insertion rod 1561 to scrape the acid mist on the lower surface of the first condensing plate 12 and the second condensing plate 13, so that the condensed acid mist is injected into the battery body 1 again through the reflux pipe 7, thereby improving the recovery efficiency of the electrolyte;

[0041] After formation is completed (weighing again), the amount of residual electrolyte in the battery body 1 is obtained, thereby obtaining the amount of acid mist released into the atmosphere. The release amount of battery acid mist is detected to be between 5% and 8%, which reduces the waste of acid mist, reduces costs, and improves formation efficiency.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An acid mist reflux device in a lead-acid battery formation process, comprising a battery body (1) and a reflux housing (3), characterized in that: The inner cavity of the reflux shell (3) is provided with a plurality of groups of first condensing sheets (12) and a plurality of groups of second condensing sheets (13), and the plurality of groups of the first condensing sheets (12) and the plurality of groups of the second condensing sheets (13) are arranged alternately and staggered, and the extension lines of the first condensing sheets (12) and the extension lines of the second condensing sheets (13) are arranged to intersect with the horizontal plane. The upper end of the reflux shell (3) is sealed with a top cover (4), and the upper surface of the top cover (4) is provided with a first injection pipe (5). The lower end of the reflux shell (3) is sealed with a collecting cover (6), and the lower end of the collecting cover (6) is provided with a reflux pipe (7). The upper surface of the battery body (1) is provided with a second injection pipe (14), and a sealing component (2) is provided between the reflux pipe (7) and the second injection pipe (14). Scraper components (15) for acid mist reflux are installed on both sides of the reflux shell (3).

2. The acid mist reflux device in a lead-acid battery formation process according to claim 1, characterized in that: A plurality of groups of the first condensing plates (12) are arranged at equal intervals, a plurality of groups of the second condensing plates (13) are arranged at equal intervals, and a buffer drainage plate (11) located below the first liquid injection pipe (5) is provided on the lower surface of the top cover (4).

3. The acid mist reflux device in a lead-acid battery formation process according to claim 2, characterized in that: A buffer cavity (10) is formed between the buffer drainage plate (11), the plurality of groups of first condensing sheets (12) and the plurality of groups of second condensing sheets (13), and the buffer cavity (10) is arranged in a serpentine shape.

4. The acid mist reflux device in a lead-acid battery formation process according to claim 3, characterized in that: The sealing assembly (2) comprises a sealing rubber sleeve (21), the inner cavity of the sealing rubber sleeve (21) being provided with a butt-jointed sealing inner ring (22) for isolating a return pipe (7) and a second injection pipe (14), the outer diameter of the return pipe (7) being the same as the outer diameter of the second injection pipe (14).

5. The acid mist reflux device in a lead-acid battery formation process according to claim 4, characterized in that: Two groups of limiting outer rings (23) are symmetrically arranged on the outer side of the sealing rubber sleeve (21), a mounting portion (27) is arranged between the two groups of limiting outer rings (23), and a locking hoop (24) is sleeved on the outer side of the mounting portion (27).

6. The acid mist reflux device in a lead-acid battery formation process according to claim 5, characterized in that: Both ends of the locking hoop (24) are fixedly connected with protrusions (25), and one side of the two groups of protrusions (25) is threadedly connected with locking screws (26).

7. The acid mist reflux device in a lead-acid battery formation process according to claim 6, characterized in that: The scraper assembly (15) comprises a supporting driving member and a scraper member (156) connected by transmission through the supporting driving member. Both sides of the return housing (3) are provided with inclined side holes (8) for the scraper member (156) to be slidably inserted. A plurality of groups of the inclined side holes (8) are arranged in a rectangular array.

8. The acid mist reflux device in a lead-acid battery formation process according to claim 7, characterized in that: The support driving member comprises a support plate (151), a forward and reverse motor (152) is mounted on the upper surface of the support plate (151), and an output shaft of the forward and reverse motor (152) is transmission-connected to a reciprocating screw rod (153).

9. The acid mist reflux device in a lead-acid battery formation process according to claim 8, characterized in that: The scraper (156) comprises a connecting plate (154), a threaded sleeve (155) threadedly connected to the reciprocating screw (153) is fixedly connected to the lower end of one side of the connecting plate (154), and a plurality of groups of plug rods (1561) are fixedly connected to the other side of the connecting plate (154), one end of two adjacent groups of plug rods (1561) both pass through the return housing (3) and are fixedly connected to a scraper (1562), and the scraper (1562) is slidably connected to the lower surfaces of the first condensing sheet (12) and the second condensing sheet (13).

10. The acid mist reflux device in the lead-acid battery formation process according to claim 9, characterized in that: The lower surface of the support plate (151) is fixedly connected to a support rod (157), and a plurality of groups of the inclined side holes (8) are each sleeved with a sealing sleeve (9) located on the outside of the insertion rod (1561).

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