Battery acid adding machine, acid adding method and formation method

Abstract

The invention relates to a battery acid adding machine, an acid adding method and a formation method, belongs to the technical field of storage batteries, and solves the problems that in the prior art, air is easily introduced in the battery acid adding process, and the formation effect of a battery is affected. According to the acid adding machine disclosed by the invention, the acid transition pipe main body and the battery are respectively subjected to vacuum treatment, so that atmosphere can be prevented from entering the battery while acid is added, and the interior of the battery is prevented from being communicated with the atmosphere in the whole acid adding process. By adopting the acid adding method, the service life of the storage battery can be prolonged, and meanwhile, the problem that the conductivity is reduced due to the fact that lead sulfate is generated on the corrosion layer is avoided; the difficulty of temperature control during formation can be reduced, and the formation effect can be improved. By adopting the acid adding method disclosed by the invention, the adverse effect of impact on the partition plate caused by the change of the acid adding pressure difference due to the change of the atmospheric pressure in the existing acid adding process can be avoided.

Description

[0001] This application is a divisional application of the parent application with application number 202311465349.8, filed on November 6, 2023, and invention name “A battery acid adding machine, acid adding method and formation method”. Technical Field

[0002] The invention relates to the technical field of storage batteries, and in particular to a battery acid adding machine, an acid adding method and a formation method. Background Art

[0003] Sulfuric acid is an important component of lead-acid batteries, and it plays a decisive role in the performance of lead-acid batteries. At present, most lead-acid batteries are vacuumed during the acid addition process to achieve the purpose of effectively infiltrating the center of the pole group with the electrolyte.

[0004] However, in the existing method, after the battery is evacuated, air will enter the battery while adding acid, so that air enters the internal pores of the corrosion layer of the battery plate, while water in the acid cannot enter, which will affect the formation effect of the battery. Summary of the invention

[0005] In view of the above analysis, the present invention aims to provide a battery acid adding machine, an acid adding method and a formation method, which are used to solve the problems in the prior art that air is easily introduced during the battery acid adding process, affecting the battery formation effect.

[0006] In a first aspect, the present invention provides a battery acid filling machine, the acid filling machine comprises a fixed acid pipe and an acid transition pipe arranged from bottom to top, the acid transition pipe comprises a first pipeline, a second pipeline and an acid transition pipe body, the upper end of the acid transition pipe body is connected to the lower end of the fixed acid pipe through the first pipeline, the lower end of the acid transition pipe body is connected to the upper end of the second pipeline, the lower end of the second pipeline has an acid outlet, and the lower end of the acid transition pipe body is connected to the battery through the acid outlet;

[0007] The first pipeline is provided with an upper pipeline sealing mechanism, and the upper pipeline sealing mechanism is located above the acid transition pipe body. The first pipeline is also connected to a first vacuum pipe, one end of which is connected to the acid transition pipe body, and the first vacuum pipe is in communication with the acid transition pipe body.

[0008] The second pipeline is fixedly connected with a middle pipeline sealing mechanism and a lower pipeline sealing mechanism in sequence from top to bottom. The second pipeline is also connected with a second vacuum pumping pipe, and the second vacuum pumping pipe is connected between the middle pipeline sealing mechanism and the acid outlet.

[0009] Furthermore, the first vacuum tube is also provided with an upper switch valve for closing and connecting the first vacuum tube and the vacuum pump, and the second vacuum tube is also provided with a lower switch valve for closing and connecting the second vacuum tube and the vacuum pump.

[0010] Furthermore, the first vacuum tube and the second vacuum tube are provided with a first vacuum detector and a second vacuum detector, respectively.

[0011] Furthermore, the first vacuum pipe is connected to the acid transition pipe body through the first pipeline.

[0012] Furthermore, the first pipeline, the second pipeline and the acid transition pipe body are all cylindrical hole-shaped, and the inner diameter of the acid transition pipe body is larger than the inner diameter of the first pipeline and the inner diameter of the second pipeline.

[0013] Furthermore, an acid reflux prevention pipe is provided on the second vacuum pipe, and the acid reflux prevention pipe is formed by enlarging the inner diameter of a part of the second vacuum pipe.

[0014] Furthermore, an upper pressure regulating valve is provided on the first vacuum pipe, and a lower pressure regulating valve is provided on the second vacuum pipe.

[0015] Furthermore, the first vacuum pumping tube and the second vacuum pumping tube are connected in parallel and then connected to the vacuum pump through the third vacuum pumping tube.

[0016] Furthermore, a medium pressure regulating valve is provided on the third vacuum pumping pipe.

[0017] Furthermore, the lower pipe sealing mechanism is arranged between the second vacuum pipe and the acid outlet to prevent the acid in the second pipe from flowing out when the acid adding machine is lifted and the second pipe is separated from the battery.

[0018] Furthermore, the acid reflux prevention pipe is arranged at the upper end of the second vacuum pipe close to the middle pipe sealing mechanism, and its function is to prevent the acid in the battery from flowing back when the battery is vacuumed.

[0019] Furthermore, the first vacuum tube is provided with an upper exhaust valve, and the second vacuum tube is provided with a lower exhaust valve.

[0020] In a second aspect, the present invention provides a method for adding acid to a battery, comprising the following steps:

[0021] S0: storing the acid in the fixed acid tube, adding the first quantitative amount of the acid stored in the fixed acid tube into the acid transition tube body, and performing vacuum treatment on the acid transition tube body and the battery respectively;

[0022] S1: First acid addition: Add the first quantitative amount of acid in the acid transition tube body to the battery, and the first acid addition is completed;

[0023] S2: Secondary acid addition: vacuum treatment is performed on the acid transition tube body and the battery respectively, the sealing mechanism of the middle pipeline is opened, and the acid in the acid transition tube body is added to the battery, and the secondary acid addition is completed;

[0024] When adding acid for the first time, the difference between the vacuum value of the acid transition tube body and the vacuum value of the battery is smaller than the difference between the vacuum value of the acid transition tube body and the vacuum value of the battery when adding acid for the second time in step S2.

[0025] Further, the specific steps include:

[0026] S1: First acid addition: Open the sealing mechanism of the middle pipe, add the first quantitative amount of acid in the acid transition pipe body into the battery, and the first acid addition is completed.

[0027] In a third aspect, the present invention provides a method for adding acid to a battery, comprising the following steps:

[0028] S0: storing the acid in the acid-fixing tube, adding the acid stored in the acid-fixing tube into the acid transition tube body, and performing vacuum treatment on the acid transition tube body and the battery respectively;

[0029] S1: First acid addition: Open the sealing mechanism of the middle pipe, add the acid in the acid transition pipe body into the battery, and the first acid addition is completed;

[0030] When acid is added multiple times, the first acid addition amount shall not exceed 15% of the total acid amount, and the vacuum value inside the battery shall be -0.09Mpa to -0.05Mpa.

[0031] Further, the specific steps include:

[0032] S0: Close the upper pipe sealing mechanism and the middle pipe sealing mechanism, store the acid in the fixed acid pipe, open the upper pipe sealing mechanism to allow the acid in the fixed acid pipe to flow quantitatively into the acid transition pipe body for the first time, then close the upper pipe sealing mechanism, and perform vacuum treatment on the acid transition pipe body and the battery respectively.

[0033] Furthermore, it also includes S2: secondary acid addition: closing the middle pipe sealing mechanism, opening the upper pipe sealing mechanism, flowing the second quantitative acid in the fixed acid pipe into the acid transition pipe body, then closing the upper pipe sealing mechanism, vacuuming the acid transition pipe body and the battery respectively, opening the middle pipe sealing mechanism, adding the second quantitative acid in the acid transition pipe body into the battery, and completing the secondary acid addition.

[0034] Furthermore, the method further comprises S3: adding acid three times: repeating step S2 to complete adding acid three times.

[0035] Furthermore, the method further comprises S4: adding acid four times: repeating step S2 to complete adding acid four times.

[0036] Furthermore, it also includes S6: the battery is discharged, the acid adding machine is raised, and the acid adding is completed.

[0037] Furthermore, before S6, it also includes the final acid addition in S5: static treatment to ensure that all the acid flows into the rich liquid pot.

[0038] Furthermore, the quantitative amount of acid in the acid transition tube body during the first acid addition in step S1 is less than the quantitative amount of acid in the acid transition tube body during the second acid addition in step S2.

[0039] In a fourth aspect, the present invention provides a battery formation method, including the battery acid adding method.

[0040] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0041] (1) The acid dosing machine of the present invention performs vacuum treatment on the acid transition tube body and the battery respectively, thereby preventing the atmosphere from entering the battery while acid is being added in the prior art, thereby ensuring that the battery interior is prevented from communicating with the atmosphere during the entire acid adding process;

[0042] (2) When the acid adding method of the present invention is used, the outside air will not enter the battery during acid adding. In the conventional acid adding method, air will first enter the pores of the corrosion layer of the battery plate, thereby preventing water from entering the pores of the corrosion layer. During the formation, part of the acid has also entered the pores of the corrosion layer along with the water, forming an acidic environment. However, when the acid is added to the battery using the method of the present invention, the water in the acid will easily enter and fill the internal pores of the corrosion layer of the battery plate due to the corresponding vacuum in the battery. When the acid is added and the battery is charged and formed, due to the presence of water, the corrosion layer is in a neutral or alkaline environment. The corrosion layer will generate α-PbO in the corrosion layer of the positive plate through electrochemical reaction. 2 ,α-PbO 2 It is strong and relatively stable, ensuring the skeleton effect of the grid connecting the active material, thereby increasing the life of the battery, while also avoiding the problem of decreased conductivity caused by the generation of lead sulfate after the acid enters the corrosion layer. Similarly, the corrosion layer of the negative plate will generate a strong skeleton lead, ensuring the skeleton effect of the grid connecting the active material, thereby increasing the life of the battery, while also avoiding the problem of decreased conductivity caused by the generation of lead sulfate in the corrosion layer. In addition, the skeleton structure generated by the electrochemical reaction of the corrosion layer is an endothermic reaction, which can reduce the difficulty of temperature control during formation and is conducive to improving the formation efficiency; in addition, the bottom of the active material, which is close to the corrosion layer, can also achieve similar technical effects as the corrosion layer.

[0043] (3) The acid addition method of the present invention can also avoid the adverse impact on the partition caused by the change of the acid addition pressure difference due to the change of atmospheric pressure during the existing acid addition.

[0044] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0046] Figure 1 It is a structural schematic diagram of an acid adding machine of the present invention;

[0047] Figure 2 It is a structural schematic diagram of another acid adding machine of the present invention;

[0048] Figure 3 It is a structural schematic diagram of another acid adding machine of the present invention;

[0049] Figure 4 It is a structural schematic diagram of another acid adding machine of the present invention.

[0050] Reference numerals:

[0051] 1-acid fixing pipe, 2-acid transition pipe body, 3-acid adding pot, 4-upper pipeline sealing mechanism, 5-middle pipeline sealing mechanism, 6-lower pipeline sealing mechanism, 7-first vacuum tube, 71-first pipeline, 8-second vacuum tube, 81-second pipeline, 9-acid reflux prevention pipe, 10-upper pressure regulating valve, 11-upper switch valve, 12-lower pressure regulating valve, 13-lower switch valve, 14-upper exhaust valve, 15-lower exhaust valve, 16-battery, 17-third vacuum tube, 18-middle pressure regulating valve, 19-first vacuum detector, 20-second vacuum detector. DETAILED DESCRIPTION

[0052] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0053] A specific embodiment of the present invention, as Figure 1-4As shown, a battery acid adding machine is disclosed, wherein the acid adding machine is connected with a fixed acid pipe 1 and an acid transition pipe in sequence from top to bottom, the acid transition pipe comprises a first pipe 71, a second pipe 81 and an acid transition pipe body 2, the acid transition pipe body 2 is connected with the fixed acid pipe 1 through the first pipe 71, the first pipe 71 is connected with an upper pipe sealing mechanism 4, the acid transition pipe body 2 is connected with a battery 16 through the second pipe 81, the second pipe 81 has an acid outlet, the acid outlet of the second pipe 81 is finally connected with the battery 16 through an acid adding pot 3 installed on the battery 16, the second pipe 81 is connected with a middle pipe sealing mechanism 5, the first pipe 71 is also connected with a first vacuum pipe 7, the first vacuum pipe 7 is connected with the acid transition pipe body 2, the first vacuum pipe 7 is connected with a vacuum pump, the second pipe 81 is also connected with a second vacuum pipe 8, the second vacuum pipe 8 is connected between the middle pipe sealing mechanism 5 and the acid outlet, and the second vacuum pipe 8 is connected with a vacuum pump.

[0054] In a further preferred solution, an upper switch valve 11 is provided on the first vacuum tube 7 for closing and connecting the first vacuum tube 7 and the vacuum pump, and a lower switch valve 13 is also provided on the second vacuum tube 8 for closing and connecting the second vacuum tube 8 and the vacuum pump. The inner diameter of the end of the second vacuum tube 8 close to the second pipeline 81 is increased to form an acid reflux prevention tube 9, and the acid reflux prevention tube 9 is formed by increasing the inner diameter of part of the second vacuum tube 8. The vacuum pump connected to the first vacuum tube 7 and the vacuum pump connected to the second vacuum tube 8 are preferably the same vacuum pump.

[0055] In addition, the first vacuum pipe 7 can also be directly connected to the acid transition pipe body 2. The first pipe 71, the second pipe 81 and the acid transition pipe body 2 are preferably cylindrical holes, and the inner diameter of the acid transition pipe body 2 is preferably larger than the inner diameter of the first pipe 71, and preferably also larger than the inner diameter of the second pipe 81. The inner diameter of the first pipe 71 is preferably equal to the inner diameter of the second pipe 81.

[0056] Compared with the prior art, the acid dosing machine of the present invention evacuates the acid transition tube body 2 and the battery 16 respectively, thereby preventing the atmosphere from entering the battery 16 while adding acid in the prior art, thereby ensuring that the battery 16 is prevented from communicating with the atmosphere during the entire acid adding process.

[0057] In a specific embodiment, the first vacuum tube 7 and the second vacuum tube 8 are connected in parallel and then connected to the vacuum pump through the third vacuum tube 17 .

[0058] It should be noted that the first vacuum tube 7 and the second vacuum tube 8 are connected in parallel to the same vacuum pump ( Figure 3(not marked in the figure), when the vacuum pump evacuates the acid transition tube body 2 and the battery 16 at the same time, the upper switch valve 11 and the lower switch valve 13 are opened, and the acid transition tube body 2 is evacuated to the required vacuum degree by controlling the vacuum pump's evacuation time (the vacuum degree achieved is calculated by the vacuum degree per unit time and the time). When the time is up, the upper switch valve 11 is closed, and the vacuum pump continues to evacuate the battery 16. Similarly, the battery 16 is evacuated to the required vacuum degree by time control. When the time is up, the lower switch valve 13 is closed.

[0059] In this specific implementation mode, Figure 4 As shown, in addition to controlling the vacuum degree of the acid transition tube body 2 and the battery 16 by controlling the vacuum pump evacuation time, a first vacuum degree detector 19 and a second vacuum degree detector 20 can be respectively set in the vacuum tubes of the acid transition tube body 2 and the battery 16. When the vacuum pump evacuates the acid transition tube body 2 and the battery 16, when the first vacuum degree detector 19 detects that the vacuum degree of the acid transition tube body 2 reaches the set vacuum degree, the upper switch valve 11 is controlled to be closed, and when the second vacuum degree detector 20 detects that the vacuum degree of the battery 16 reaches the set vacuum degree, the lower switch valve 13 is controlled to be closed.

[0060] In a specific embodiment, the first vacuum tube 7 is further provided with an upper pressure regulating valve 10, and the second vacuum tube 8 is further provided with a lower pressure regulating valve 12. Figure 1 shown.

[0061] Need to explain, the first vacuumizing pipe 7 and the second vacuumizing pipe 8 are connected in parallel with the same vacuum pump (not marked among the figures), when the acid transition main body 2 is vacuumized, open the upper pressure regulating valve 10 and be arranged to the required vacuum degree of the acid transition pipe main body 2, the upper switch valve 11, the vacuum pump, the acid transition pipe main body 2 is vacuumized to the required vacuum degree, the vacuum degree that the upper pressure regulating valve 10 is arranged, close the upper switch valve 11 and the vacuum pump. When the battery 16 is vacuumized, open the lower pressure regulating valve 12 and be arranged to the required vacuum degree of the battery 16, the lower switch valve 13 and the vacuum pump, the battery 16 is vacuumized to the required vacuum degree, the vacuum degree that the lower pressure regulating valve 12 is arranged, close the lower switch valve 13 and the vacuum pump. In the present embodiment, preferably the upper pressure regulating valve and the lower pressure regulating valve are adjusted to the vacuum value required separately, then vacuumize by the same vacuum pump, complete the vacuum degree required separately of the acid transition pipe main body 2 and the battery 16.

[0062] In a specific embodiment, Figure 2 As shown, the third vacuum tube 17 is provided with a middle pressure regulating valve 18 , the first vacuum tube 7 is provided with an upper switch valve 11 , and the second vacuum tube 8 is provided with a lower switch valve 13 .

[0063] It should be noted that the first vacuuming tube 7 and the second vacuuming tube 8 are connected in parallel and connected to the same vacuum pump (not marked in the figure), and vacuuming is performed by the same vacuum pump. Since the acid solution needs to flow into the battery 16 from the acid transition tube main body 2, the vacuum value of the acid transition tube main body 2 is always greater than the vacuum value of the battery 16. First, the middle pressure regulating valve 18 is opened and the required vacuum is set, and the acid transition tube main body 2 and the battery 16 are vacuumed together. When the vacuum of the acid transition tube main body 2 and the battery 16 reaches the vacuum value required by the acid transition tube main body 2, that is, the vacuum value set by the middle pressure regulating valve 18, the upper switch valve 11 is closed to maintain the vacuum value of the acid transition tube main body 2, the vacuum pump is stopped, the vacuum of the middle pressure regulating valve 18 is reset, and the vacuum pump is opened to continue vacuuming the battery 16 until the vacuum required by the battery 16 is reached, that is, the vacuum of the reset middle pressure regulating valve 18, and the lower switch valve 13 is closed.

[0064] In a specific embodiment, it is best to start evacuating the acid transition tube body 2 and the battery 16 at the same time to improve the acid addition efficiency.

[0065] In a specific implementation, an upper exhaust valve 14 is further provided on the first vacuum tube 7 .

[0066] In a specific implementation manner, a lower exhaust valve 15 is further provided on the second vacuum pipe 8 .

[0067] In a specific embodiment, the first pipeline 71 , the second pipeline 81 and the acid transition pipe body 2 are cylindrical hole shapes, and the inner diameter of the acid transition pipe body 2 is larger than the inner diameter of the first pipeline 71 and the inner diameter of the second pipeline 81 .

[0068] Secondly, the upper pipeline sealing mechanism 4, the middle pipeline sealing mechanism 5 and the lower pipeline sealing mechanism 6 described in the present invention are all structures of the prior art, as long as the pipeline can be sealed without leakage, the present invention will not be elaborated in detail. The upper pipeline sealing mechanism 4, the middle pipeline sealing mechanism 5 and the lower pipeline sealing mechanism 6 of the present invention are preferably an upper pipeline clamping mechanism, a middle pipeline clamping mechanism and a lower pipeline clamping mechanism respectively, and the pipeline for adding acid in the present invention is preferably a hose, so that when the upper pipeline clamping mechanism, the middle pipeline clamping mechanism and the lower pipeline clamping mechanism are clamped, a sealed space is formed. The acid reflux prevention pipe 9 in the present invention is a pipe with an enlarged inner diameter, and its function is to prevent the acid in the battery 16 from flowing back when the battery 16 is evacuated.

[0069] It should be noted that the functions of the upper pipe sealing mechanism 4 and the middle pipe sealing mechanism 5 described in the present invention are to control the acid liquid to flow down, and the function of the lower pipe sealing mechanism 6 is to prevent the acid liquid in the second pipe 81 from flowing out when the acid adding machine is lifted and the second pipe 81 is separated from the battery 16. During the acid adding process of the present invention, the lower pipe sealing mechanism 6 is always in an open state, and only after the last step of acid adding is completed and the acid adding machine is lifted, the lower pipe sealing mechanism 6 will be closed. In addition, the second pipe 81 described in the present invention is arranged in a one-to-one correspondence with the acid adding pot 3, and the second pipe 81 is connected to the acid adding pot 3 to form a sealed structure.

[0070] In another specific embodiment of the present invention, a method for adding acid to a battery is disclosed, comprising the following steps:

[0071] S0: storing the acid in the acid-fixing tube 1, adding the first quantitative amount of acid stored in the acid-fixing tube 1 into the acid transition tube body 2, and performing vacuum treatment on the acid transition tube body 2 and the battery 16 respectively;

[0072] S1: first acid addition: a first quantitative amount of acid in the acid transition tube body 2 is added to the battery 16, and the first acid addition is completed.

[0073] In a further preferred embodiment, the battery acid adding method specifically comprises the following steps:

[0074] S0: close the upper pipeline sealing mechanism 4 and the middle pipeline sealing mechanism 5, store the acid in the fixed acid pipe 1, open the upper pipeline sealing mechanism 4 to allow the first quantitative acid in the fixed acid pipe 1 to flow into the acid transition pipe main body 2, then close the upper pipeline sealing mechanism 4, and vacuum-treat the acid transition pipe main body 2 and the battery 16 respectively; the vacuum-treating of the acid transition pipe main body 2 and the battery 16 is preferably a vacuum-treating, and it can also be, for example: at least one other acid adding pipe connected to the acid transition pipe main body 2 and the fixed acid pipe 1 is provided between the fixed acid pipe 1 and the acid transition pipe main body 2, and only the other acid adding pipes are vacuum-treated. During the acid-adding process, when the acid enters the acid transition pipe main body 2 from the other acid adding pipes in sequence, as long as the required vacuum degree is reached in the acid transition pipe main body 2 at this time.

[0075] S1: First acid addition: open the middle pipe sealing mechanism 5, add the first quantitative amount of acid in the acid transition pipe body 2 into the battery 16, and the first acid addition is completed.

[0076] It should be noted that the structure of the acid adding pipe is the same as that of the acid transition pipe body 2 , and the method of evacuating the acid adding pipe is the same as that of evacuating the acid transition pipe body 2 .

[0077] In a specific embodiment, it also includes S2: secondary acid addition: closing the middle pipe sealing mechanism 5, opening the upper pipe sealing mechanism 4, and flowing the second quantitative acid in the acid tube 1 into the acid transition tube body 2, then closing the upper pipe sealing mechanism 4, vacuum-treating the acid transition tube body 2 and the battery 16 respectively, opening the middle pipe sealing mechanism 5, and adding the second quantitative acid in the acid transition tube body 2 to the battery 16, and the secondary acid addition is completed.

[0078] In a specific embodiment, the method further includes S3: adding acid three times: repeating step S2 to complete adding acid three times.

[0079] In a specific embodiment, the method further includes S4: adding acid four times: repeating step S2 to complete four times of adding acid.

[0080] In a specific embodiment, the process further includes S5: adding acid at last: standing to ensure that all the acid solution flows into the acid adding pot 3;

[0081] S6: The battery 16 is de-aired, the acid adding machine is lifted, and the acid adding is completed.

[0082] Compared with the prior art, the acid adding method of the present invention does not allow external air to enter the battery 16 when acid is added, because in the prior art, air will first enter the pores of the corrosion layer of the battery 16 plate when acid is added, thereby preventing water from quickly entering the pores of the corrosion layer. However, when acid is added to the battery 16 using the method of the present invention, water in the acid will quickly enter the internal pores of the corrosion layer of the battery 16 plate. When charging and formation are performed after acid addition is completed, due to the presence of water, the corrosion layer is in a neutral or alkaline environment. The corrosion layer will first generate α-PbO in the corrosion layer of the positive plate through electrochemical reaction. 2 ,α-PbO 2 It is strong and relatively stable, ensuring the skeleton effect of the connection between the grid and the active material, thereby increasing the life of the battery, while also avoiding the problem of decreased conductivity caused by the generation of lead sulfate in the corrosion layer. In addition, the bottom of the active material, which is close to the corrosion layer, can also achieve similar technical effects as the corrosion layer.

[0083] Similarly, the corrosion layer of the negative plate will generate strong skeleton lead, which ensures the skeleton effect of connecting the grid and the active material, thereby increasing the life of the battery, while also avoiding the problem of decreased conductivity caused by the generation of lead sulfate in the corrosion layer.

[0084] In addition, the skeleton structure generated by the electrochemical reaction of the corrosion layer and the skeleton structure generated by the electrochemical reaction at the bottom of the active material are both endothermic reactions, which can reduce the difficulty of temperature control during formation and help improve the formation efficiency.

[0085] Finally, the acid adding method of the present invention can also avoid the adverse impact on the partition caused by the change of the acid adding pressure difference due to the change of atmospheric pressure during the existing acid adding.

[0086] In addition, when acid is added multiple times in the present invention, the quantitative amount of acid in the acid transition tube main body 2 during the first acid addition is less than the amount of acid added in at least one subsequent acid addition, and preferably less than the amount of acid added each time thereafter, such as less than the quantitative amount of acid in the acid transition tube main body 2 during any of the second acid addition, the third acid addition, or the fourth acid addition, and the sum of the quantitative amounts of acid in all acid additions is equal to the total amount of acid required by the battery.

[0087] It should be noted that the amount of acid added for the first time is small, so that the acid can react in the active substance as much as possible, thereby further ensuring that the acid does not enter the pores of the corrosion layer, allowing water to enter the pores of the corrosion layer as much as possible during the first acid addition.

[0088] In a specific embodiment, the vacuum degree value after vacuum treatment in the acid transition tube body 2 is greater than the vacuum degree value after evacuation of the battery 16 , and the acid liquid is used to flow from the acid transition tube body 2 into the battery 16 .

[0089] In addition, when the acid is added multiple times in the present invention, the acid transition tube body 2 and the battery 16 are evacuated, the evacuation can be performed directly by a vacuum pump, or air can be firstly introduced into the acid transition tube body 2 or the battery 16 before evacuation. Whether air needs to be introduced depends on the influence of the gas generated by the reaction after the previous acid addition on the vacuum degree.

[0090] In addition, the acid adding method of a battery of the present invention can be performed once or multiple times according to actual conditions, and the number of times of multiple acid adding can be set as needed, without affecting the purpose of the present invention. Multiple acid adding can better achieve the purpose of the present invention. In addition, the acid adding method of a battery of the present invention can be performed once or multiple times according to actual conditions, and multiple acid transition tube bodies can be evacuated, as long as the required acid adding pressure difference is met when the acid is added to the battery.

[0091] Specifically, the vacuum value inside the battery 16 of the present invention is preferably the smallest when acid is added for the first time. When acid is added multiple times, the vacuum value inside the battery 16 preferably changes from -0.09Mpa to -0.05Mpa. The purpose is to ensure that there is as little air as possible inside the battery 16 at the beginning, and to ensure that water fills the pores of the corrosion layer as quickly as possible when acid is added for the first time.

[0092] Specifically, when acid is added multiple times, the amount of acid added for the first time is at least less than the amount of acid added for any of the subsequent acid additions, preferably less than the amount of acid added for any of the subsequent acid additions, and preferably not more than 15% of the total acid amount. The acid added for the first time is consumed by the active substance as much as possible. In this way, by setting the vacuum value inside the battery when acid is added for the first time and the amount of acid added, it is possible to better avoid acid from entering the corrosion layer when acid is added for the first time. Since the amount of air inside the battery 16 decreases during the subsequent acid addition, and water has basically occupied the pores of the corrosion layer, the vacuum value inside the battery 16 can be increased.

[0093] Secondly, it is best to start with a small vacuum pressure difference and then increase it. The vacuum pressure difference is the difference between the vacuum value of the acid transition tube body 2 and the vacuum value of the battery 16. It is mainly to consider the impact of the vacuum pressure difference on the partition when adding acid. When adding acid for the first time, the partition has not yet entered the acid solution. At this time, if the vacuum pressure difference is too large, the partition will be damaged. When adding acid later, the partition has entered the acid solution, and the increased vacuum pressure difference will not cause an impact on the partition. While taking the partition into consideration, the efficiency of acid addition is also guaranteed.

[0094] In a specific implementation, step S0 specifically includes the following:

[0095] S01: Acid quantitative addition: close the upper pipeline sealing mechanism 4 and the middle pipeline sealing mechanism 5, and quantitatively add acid in the acid quantitative tube 1;

[0096] S02: Open the upper pipeline sealing mechanism 4, and let the acid in the acid-fixing pipe 1 flow into the acid transition pipe body 2 in a quantitative manner for the first time. After the acid has completely flowed in, close the upper pipeline sealing mechanism 4;

[0097] S03: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, and use the vacuum pump to evacuate the acid transition pipe body 2 for a period of time to evacuate the acid transition pipe body 2 to -0.075 to -0.065 MPa (the vacuum degree is controlled by the vacuum pump evacuation time), and close the upper switch valve 11;

[0098] S04: Vacuuming the battery 16: Open the lower switch valve 13, and the vacuum pump continues to evacuate the battery 16 for a period of time to -0.085~-0.095MPa (the vacuum degree is controlled by the vacuum pump's evacuation time), and then close the lower switch valve 13.

[0099] In a specific implementation, step S0 specifically includes the following:

[0100] S01: Acid quantitative addition: close the upper pipeline sealing mechanism 4 and the middle pipeline sealing mechanism 5, and quantitatively add acid in the acid quantitative tube 1;

[0101] S02: Open the upper pipeline sealing mechanism 4, and let the acid in the acid-fixing pipe 1 flow quantitatively into the acid transition pipe body 2 for the first time. After the acid has completely flowed in, close the upper pipeline sealing mechanism 4;

[0102] S03: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, and when the first vacuum detector 19 detects that the vacuum degree of the acid transition pipe body 2 is -0.075 to -0.065 MPa, close the upper switch valve 11;

[0103] S04: Evacuate the battery 16: open the lower switch valve 13, and the vacuum pump continues to evacuate the battery 16. When the second vacuum detector 20 detects that the vacuum degree of the battery 16 reaches -0.085 to -0.095 MPa, close the lower switch valve 13.

[0104] In a specific implementation, step S0 specifically includes the following:

[0105] S01: Acid quantitative addition: close the upper pipeline sealing mechanism 4 and the middle pipeline sealing mechanism 5, and quantitatively add acid in the acid quantitative tube 1;

[0106] S02: Open the upper pipeline sealing mechanism 4, and let the acid in the acid-fixing pipe 1 flow quantitatively into the acid transition pipe body 2 for the first time. After the acid has completely flowed in, close the upper pipeline sealing mechanism 4;

[0107] S03: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, evacuate the acid transition pipe body 2 to -0.075~-0.065MPa (the vacuum degree is controlled by the upper pressure regulating valve 10), and close the upper switch valve 11;

[0108] S04: Evacuate the battery 16: open the lower switch valve 13, evacuate the battery 16 to -0.085~-0.095MPa (the vacuum degree is controlled by the lower pressure regulating valve 12), and close the lower switch valve 13.

[0109] In a specific implementation, step S0 specifically includes the following:

[0110] S01: Acid quantitative addition: close the upper pipeline sealing mechanism 4 and the middle pipeline sealing mechanism 5, and quantitatively add acid in the acid quantitative tube 1;

[0111] S02: Open the upper pipeline sealing mechanism 4, and let the acid in the acid-fixing pipe 1 flow quantitatively into the acid transition pipe body 2 for the first time. After the acid has completely flowed in, close the upper pipeline sealing mechanism 4;

[0112] S03: Vacuuming the acid transition pipe body 2: Open the middle pressure regulating valve 18, the upper switch valve 11, and evacuate the acid transition pipe body 2 to -0.075--0.065 MPa (the vacuum degree is controlled by the middle pressure regulating valve 18), and close the upper switch valve 11;

[0113] S04: Evacuate the battery 16: Open the middle pressure regulating valve 18, lower the switch valve 13, and evacuate the battery 16 to -0.085 to -0.095 MPa (the vacuum degree is controlled by the middle pressure regulating valve 18).

[0114] In a specific implementation, step S1 specifically includes the following:

[0115] S11: Open the middle pipe sealing mechanism 5, add the first quantitative amount of acid in the acid transition pipe body 2 into the battery 16, and the first acid addition is completed.

[0116] In a specific implementation, step S2 specifically includes the following:

[0117] S21: close the middle pipe sealing mechanism 5, open the upper pipe sealing mechanism 4, let the second quantitative acid solution in the acid setting pipe 1 flow into the acid transition pipe body 2, and close the upper pipe sealing mechanism 4;

[0118] S22: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, evacuate the acid transition pipe body 2 to -0.025 to -0.015 MPa, and close the upper switch valve 11;

[0119] S23: Vacuuming the battery: Open the lower switch valve 13, evacuate the battery 16 to -0.055~-0.045MPa, and close the lower switch valve 13;

[0120] S24: Open the middle pipe sealing mechanism 5, add a second quantitative amount of acid in the acid transition pipe body 2 into the battery 16, and the secondary acid addition is completed.

[0121] In a preferred embodiment, after step S21, the step further includes venting air from the acid transition pipe body 2: opening the upper exhaust valve 14, and closing the upper exhaust valve 14 after venting air from the acid transition pipe body 2.

[0122] In a preferred embodiment, step S22 further includes draining the battery: opening the lower exhaust valve 15 , draining the battery 16 , and then closing the lower exhaust valve 15 .

[0123] In a specific implementation, step S3 specifically includes the following:

[0124] S31: close the middle pipe sealing mechanism 5, open the upper pipe sealing mechanism 4, let the third quantitative acid solution in the acid setting pipe 1 flow into the acid transition pipe body 2, and close the upper pipe sealing mechanism 4;

[0125] S32: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, evacuate the acid transition pipe body 2 to -0.025 to -0.015 MPa, and close the upper switch valve 11;

[0126] S33: Vacuuming the battery: Open the lower switch valve 13, evacuate the battery 16 to -0.055 to -0.045 MPa, and close the lower switch valve 13;

[0127] S34: Open the middle pipe sealing mechanism 5, add a third quantitative amount of acid in the acid transition pipe body 2 into the battery 16, and the three acid additions are completed.

[0128] In a specific implementation, step S4 specifically includes the following:

[0129] S41: close the middle pipe sealing mechanism 5, open the upper pipe sealing mechanism 4, let the fourth quantitative acid solution in the fixed acid pipe 1 flow into the acid transition pipe body 2, and close the upper pipe sealing mechanism 4; S42: release air from the acid transition pipe body 2: open the upper exhaust valve 14, and after the acid transition pipe body 2 is released, close the upper exhaust valve 14;

[0130] S43: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, evacuate the acid transition pipe body 2 to -0.025 to -0.015 MPa, and close the upper switch valve 11;

[0131] S44: Vacuuming the battery: Open the lower switch valve 13, evacuate the battery 16 to -0.055 to -0.045 MPa, and close the lower switch valve 13;

[0132] S45: Open the middle pipe sealing mechanism 5, and add the second quantitative amount of acid in the acid transition pipe body 2 into the battery 16, and the fourth acid addition is completed.

[0133] In a specific embodiment, step S6 specifically includes the following: closing the middle pipeline sealing mechanism 5, opening the lower exhaust valve 15 to release air and then closing the lower exhaust valve 15, closing the lower pipeline sealing mechanism 6, and lifting the acid adding machine to complete the entire acid adding.

[0134] It should be noted that when the acid transition pipe body 2 is evacuated in the present invention, the vacuum degree size reached in the acid transition pipe body 2 is controlled by adjusting the size of the upper pressure regulating valve 10 or the middle pressure regulating valve 18; when the battery 16 is evacuated in the present invention, the vacuum degree size reached in the battery 16 is controlled by adjusting the size of the lower pressure regulating valve 12 or the middle pressure regulating valve 18. In addition, when the vacuum degree requirements are different between the acid transition pipe body 2 and the battery 16, different switch valves and pressure regulating valves can be set to adjust, and different vacuum degree requirements correspond to different switch valves and pressure regulating valves. In addition, the size of the vacuum degree can also be controlled by the vacuum pumping time or the vacuum degree of the acid transition pipe body 2 and the battery 16 can be detected by a vacuum detector, and the corresponding switch valves are closed when the vacuum degree reaches the required vacuum degree.

[0135] Another specific implementation method of the present invention discloses a battery formation method, including the battery acid addition method.

[0136] The technical solution of the present invention is further explained below in conjunction with specific implementation methods.

[0137] It should be noted that before the battery acid adding machine of the present invention starts working, the upper pipe sealing mechanism 4, the middle pipe sealing mechanism 5 and the lower pipe sealing mechanism 6 are all in an open state. When the battery 16 is acid-added, the acid adding pot 3 is first placed on the battery 16. Since the acid adding pot 3 and the battery 16 are arranged correspondingly, a sealed structure can be formed during the acid adding process, and there will be no problems of gas leakage and liquid leakage. After the acid adding is completed, the acid adding machine is lifted and separated from the acid adding pot 3, and the acid adding pot 3 and the battery 16 enter the next process.

[0138] Example 1

[0139] like Figure 1 As shown, the present embodiment discloses a battery acid adding machine, and discloses a battery acid adding machine, wherein the acid adding machine is connected with a fixed acid pipe 1, a first pipeline 71, an acid transition pipe body 2 and a second pipeline 81 in sequence from top to bottom, the first pipeline 71 is fixedly connected with an upper pipeline sealing mechanism 4, the second pipeline 81 is fixedly connected with a middle pipeline sealing mechanism 5 and a lower pipeline sealing mechanism 6 in sequence from top to bottom, the first pipeline 71 is also connected with one end of a first vacuum tube 7, the other end of the first vacuum tube 7 is connected with a vacuum pump, the second pipeline 81 is provided with an acid outlet, the acid outlet is connected with a battery 16 through an acid adding pot 3, the second pipeline 81 is also connected with one end of a second vacuum tube 8, the other end of the second vacuum tube 8 is connected with a vacuum pump, the second vacuum tube 8 is provided with an acid reflux prevention pipe 9, and the acid reflux prevention pipe 9 is formed by enlarging the inner diameter of a part of the second vacuum tube 8.

[0140] The first vacuum tube 7 and the second vacuum tube 8 are connected in parallel to form a third vacuum tube 17 , and the third vacuum tube 17 is connected to a vacuum pump.

[0141] Specifically, an upper pressure regulating valve 10 and an upper switch valve 11 are provided at one end of the first vacuum pumping tube 7 close to the vacuum pump, and an upper exhaust valve 14 is provided at one end away from the vacuum pump.

[0142] The second vacuuming pipe 8 is provided with a lower pressure regulating valve 12 and a lower switch valve 13 at one end close to the vacuum pump, and a lower exhaust valve 15 at one end away from the vacuum pump.

[0143] In this embodiment, the corresponding arrangement of the first pipeline 71, the second pipeline 81, the acid-fixing pipe 1, the acid transition pipe body 2 and the acid reflux prevention pipe 9 is taken as an example for explanation, wherein one end of the first vacuum tube 7 is connected in parallel to form multiple pipelines corresponding to the first pipeline 71, and the other end is connected to a vacuum pump (not marked in the figure); one end of the second vacuum tube 8 is connected in parallel to form multiple pipelines corresponding to the second pipeline 81, and the other end is connected to a vacuum pump (not marked in the figure).

[0144] Example 1-1

[0145] The acidifier of this embodiment is the same as that of embodiment 1, except that Figure 2 As shown, the third vacuum pipe 17 is provided with a middle pressure regulating valve 18 , the first vacuum pipe 7 is not provided with an upper pressure regulating valve 10 , and the second vacuum pipe 8 is not provided with a lower pressure regulating valve 12 .

[0146] Example 1-2

[0147] The acidifier of this embodiment is the same as that of embodiment 1, except that Figure 3 As shown, the vacuum pump is directly connected to the first vacuum pipe 7 and the second vacuum pipe 8. The first vacuum pipe 7 is not provided with an upper pressure regulating valve 10, and the second vacuum pipe 8 is not provided with a lower pressure regulating valve 12. The vacuum degree is controlled by the vacuum pumping time.

[0148] Examples 1-3

[0149] The acidifier of this embodiment is the same as that of embodiment 1-2, except that Figure 4 As shown, a first vacuum degree detector 19 and a second vacuum degree detector 20 are respectively provided in the vacuum tubes of the acid transition tube body 2 and the battery 16 to detect the vacuum degrees in the acid transition tube body 2 and the battery 16 respectively, and the vacuum degree is controlled by the first vacuum degree detector 19 and the second vacuum degree detector 20.

[0150] Example 2

[0151] This embodiment discloses a method for adding acid to a battery. Figure 1 As shown, the following steps are included:

[0152] S01: Acid quantitative addition: close the upper pipeline sealing mechanism 4 and the middle pipeline sealing mechanism 5, and quantitatively add acid in the acid quantitative tube 1;

[0153] S02: Open the upper pipeline sealing mechanism 4, and let the acid in the acid-fixing pipe 1 flow quantitatively into the acid transition pipe body 2 for the first time. After the acid has completely flowed in, close the upper pipeline sealing mechanism 4;

[0154] S03: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, evacuate the acid transition pipe body 2 to -0.07MPa (the vacuum degree is controlled by the upper pressure regulating valve 10), and close the upper switch valve 11;

[0155] S04: Vacuum the battery: press down the acid adding machine, connect the acid adding pot 3 and the battery 16, open the lower switch valve 13, evacuate the battery 16 to -0.09MPa (the vacuum degree is controlled by the lower pressure regulating valve 12), and close the lower switch valve 13.

[0156] S11: Open the middle pipe sealing mechanism 5, add the first quantitative amount of acid (all the acid solution required by the battery) in the acid transition pipe body 2 into the battery 16, and the first acid addition is completed.

[0157] S5: Final acid addition: let it stand to ensure that all the acid flows into the rich liquid pot;

[0158] S6: Close the middle pipeline sealing mechanism 5, open the lower exhaust valve 15 to release air, then close the lower exhaust valve 15, close the lower pipeline sealing mechanism 6, lift the acid adding machine to separate the acid adding pot 3 and the battery 16, and the entire acid adding is completed.

[0159] In addition, in the battery acid adding method of the present invention, the acid adding machine is pressed down, and the acid adding pot 3 is connected to the battery 16. This step can be completed at any time before the battery is evacuated, such as before the quantitative acid adding step.

[0160] Example 2-1

[0161] The battery acid adding method of this embodiment is the same as that of embodiment 2, except that the acid adding machine of embodiment 1-1 is used. Figure 2 As shown, the acid transition pipe body 2 and the battery 16 are evacuated by opening the middle pressure regulating valve 18 to evacuate the acid transition pipe body 2 and the battery 16 together, and when the vacuum degree of the acid transition pipe body 2 and the battery 16 reaches the vacuum degree value required by the acid transition pipe body 2, the upper switch valve 11 is closed to maintain the vacuum degree value of the acid transition pipe body 2. The vacuum pump continues to evacuate the battery 16 until the vacuum degree required by the battery 16 is reached, and the lower switch valve 13 is closed.

[0162] Example 2-2

[0163] The battery acid adding method of this embodiment is the same as that of embodiment 2, except that the acid adding machine described in embodiments 1-2 is used. Figure 3 As shown, the vacuum pump simultaneously evacuates the acid transition tube body 2 and the battery 16. When the set vacuum evacuation time of the acid transition tube body 2 is reached, the upper switch valve 11 is closed to maintain the vacuum value of the acid transition tube body 2. The vacuum pump continues to evacuate the battery 16 until the vacuum evacuation time reaches the vacuum required by the battery 16, and the lower switch valve 13 is closed.

[0164] Example 2-3

[0165] The battery acid adding method of this embodiment is the same as that of embodiment 2-2, except that the acid adding machine described in embodiment 1-3 is used. Figure 4 As shown, the vacuum pump simultaneously evacuates the acid transition tube body 2 and the battery 16. When the first vacuum detector 19 detects that the vacuum degree of the acid transition tube body 2 has been reached, the upper switch valve 11 is closed to maintain the vacuum value of the acid transition tube body 2. The vacuum pump continues to evacuate the battery 16. When the second vacuum detector 20 detects that the vacuum degree required by the battery 16 has been reached, the lower switch valve 13 is closed.

[0166] Example 3

[0167] The acid adding method of this embodiment is different from that of embodiment 2 in that, after step S11, it further includes:

[0168] S21: close the middle pipe sealing mechanism 5, open the upper pipe sealing mechanism 4, let the second quantitative acid solution in the acid setting pipe 1 flow into the acid transition pipe body 2, and close the upper pipe sealing mechanism 4;

[0169] S22: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, evacuate the acid transition pipe body 2 to -0.02MPa, and close the upper switch valve 11;

[0170] S23: Vacuuming the battery 16: Open the lower switch valve 13, evacuate the battery 16 to -0.05 MPa, and close the lower switch valve 13.

[0171] In this embodiment, the first and second quantitative additions of acid are respectively 15% and 85% of the total amount of acid required for the battery.

[0172] Example 3-1

[0173] The battery acid adding method of this embodiment is the same as that of embodiment 3, except that after step S21, the method further includes venting air from the acid transition pipe body 2: opening the upper exhaust valve 14, venting air from the acid transition pipe body 2, and then closing the upper exhaust valve 14;

[0174] After step S22 , the process further includes discharging air from the battery: opening the lower exhaust valve 15 , discharging air from the battery 16 , and then closing the lower exhaust valve 15 .

[0175] Example 4

[0176] The acid adding method of this embodiment is different from that of embodiment 3 in that, after step S23, it further includes:

[0177] S31: close the middle pipe sealing mechanism 5, open the upper pipe sealing mechanism 4, let the third quantitative acid solution in the acid setting pipe 1 flow into the acid transition pipe body 2, and close the upper pipe sealing mechanism 4;

[0178] S32: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, evacuate the acid transition pipe body 2 to -0.02MPa, and close the upper switch valve 11;

[0179] S33: Vacuuming the battery 16: Open the lower switch valve 13, evacuate the battery 16 to -0.05 MPa, and close the lower switch valve 13;

[0180] S34: Open the middle pipe sealing mechanism 5, add a third quantitative amount of acid in the acid transition pipe body 2 into the battery 16, and the three acid additions are completed.

[0181] In this embodiment, the first, second and third quantitative additions of acid are 10%, 50% and 40% of the total amount of acid required for the battery, respectively.

[0182] Example 5

[0183] The acid adding method of this embodiment is different from that of embodiment 4 in that, after step S34, it further includes:

[0184] S41: close the middle pipe sealing mechanism 5, open the upper pipe sealing mechanism 4, let the fourth quantitative acid solution in the acid setting pipe 1 flow into the acid transition pipe body 2, and close the upper pipe sealing mechanism 4;

[0185] S42: Vacuuming the acid transition pipe body 2: Open the upper switch valve 11, evacuate the acid transition pipe body 2 to -0.02MPa, and close the upper switch valve 11;

[0186] S43: Vacuuming the battery 16: Open the lower switch valve 13, evacuate the battery 16 to -0.05 MPa, and close the lower switch valve 13;

[0187] S44: Open the middle pipe sealing mechanism 5, and add the second quantitative amount of acid in the acid transition pipe body 2 into the battery 16, and the fourth acid addition is completed.

[0188] In this embodiment, the first, second and third quantitative additions of acid are 8%, 40%, 40% and 12% of the total amount of acid required for the battery, respectively.

[0189] Example 5-1

[0190] The acid adding method of this embodiment is the same as that of Embodiment 5, except that after step S41, the method further includes venting air from the acid transition pipe body 2: opening the upper exhaust valve 14, and closing the upper exhaust valve 14 after venting air from the acid transition pipe body 2.

[0191] The upper switch valve and the lower switch valve of the present invention can be set to be manual or electric according to needs.

[0192] Comparative Example 1

[0193] A battery acid adding method of this comparative example, such as Figure 1 As shown, the following steps are included:

[0194] S01: Acid quantitative addition: close the sealing mechanism of the middle pipeline and quantitatively add acid in the acid quantitative tube;

[0195] S02: Vacuum the battery: Vacuum the battery to -0.02MPa and close the lower switch valve.

[0196] S03: Open the sealing mechanism of the middle pipeline, add the first quantitative amount of acid (all the acid required by the battery) in the fixed acid tube into the battery 16, and the acid addition is completed.

[0197] S04: Final acid addition: let it stand to ensure that all the acid flows into the rich liquid pot;

[0198] S05: Close the sealing mechanism of the middle pipeline, open the lower exhaust valve to release air, then close the lower exhaust valve, lift the head of the acid adding machine to separate the acid adding pot 3 and the battery 16, and the entire acid adding is completed.

[0199] Comparative Example 2

[0200] A battery acid adding method of this comparative example, such as Figure 1 As shown, the following steps are included:

[0201] S01: Acid quantitative addition: close the sealing mechanism of the middle pipeline and quantitatively add acid in the acid quantitative tube;

[0202] S02: Vacuum the battery: Vacuum the battery to -0.02MPa and close the lower switch valve.

[0203] S03: Open the sealing mechanism of the middle pipeline, add the first quantitative amount of acid in the fixed acid tube into the battery 16, and the first acid addition is completed.

[0204] S04 upper acid quantification: close the sealing mechanism of the middle pipeline, and quantify the acid in the acid tube; vacuumize the battery: evacuate the battery to -0.03MPa, and close the lower switch valve; open the sealing mechanism of the middle pipeline, and add the second quantified amount of acid in the acid tube into the battery (at this time all the acid required by the battery is added to the battery), and the 2 acid additions are completed.

[0205] S05: Final acid addition: let it stand to ensure that all the acid flows into the rich liquid pot;

[0206] S06: Close the sealing mechanism of the middle pipe, open the lower exhaust valve to release air, then close the lower exhaust valve, lift the head of the acid adding machine to separate the acid adding pot and the battery, and the entire acid adding is completed.

[0207] The first and second quantitative amounts of acid in this comparative example are 15% and 85% of the total amount of acid required for the battery, respectively.

[0208] Comparative Example 3

[0209] A battery acid adding method of this comparative example, such as Figure 1 As shown, the following steps are included:

[0210] S01 Acid quantitative addition: close the sealing mechanism of the middle pipeline and quantitatively add acid in the acid quantitative tube;

[0211] S02: Vacuum the battery: Vacuum the battery to -0.02MPa and close the lower switch valve.

[0212] S03: Open the sealing mechanism of the middle pipeline, add the first quantitative amount of acid in the fixed acid tube into the battery 16, and the first acid addition is completed.

[0213] S04: Acid quantitative addition: close the sealing mechanism of the middle pipeline, and add the acid quantitatively in the acid tube; vacuumize the battery: vacuumize the battery to -0.03MPa, and close the lower switch valve; open the sealing mechanism of the middle pipeline, and add the second quantitative acid in the acid tube into the battery (at this time, all the acid required by the battery is added to the battery), and the second acid addition is completed.

[0214] S05: Acid quantitative addition: close the sealing mechanism of the middle pipeline, and add the acid quantitatively in the acid tube; vacuumize the battery: vacuumize the battery to -0.03MPa, and close the lower switch valve; open the sealing mechanism of the middle pipeline, and add the third quantitative amount of acid in the acid tube into the battery (at this time, all the acid required by the battery is added to the battery), and the acid addition is completed 3 times.

[0215] S06: Final acid addition: let it stand to ensure that all the acid flows into the rich liquid pot;

[0216] S07: Close the sealing mechanism of the middle pipe, open the lower exhaust valve to release air, then close the lower exhaust valve, lift the head of the acid adding machine to separate the acid adding pot and the battery, and the entire acid adding is completed.

[0217] The first, second and third quantitative additions of acid in this comparative example are 10%, 50% and 40% of the total amount of acid required for the battery, respectively.

[0218] Comparative Example 4

[0219] A battery acid adding method of this comparative example, such as Figure 1 As shown, the following steps are included:

[0220] S01: Acid quantitative addition: close the sealing mechanism of the middle pipeline and quantitatively add acid in the acid quantitative tube;

[0221] S02: Vacuum the battery: Vacuum the battery to -0.02MPa and close the lower switch valve.

[0222] S03: Open the sealing mechanism of the middle pipeline, add the first quantitative amount of acid in the fixed acid tube into the battery 16, and the first acid addition is completed.

[0223] S04: Acid quantitative addition: close the sealing mechanism of the middle pipeline, and add the acid quantitatively in the acid tube; vacuumize the battery: vacuumize the battery to -0.03MPa, and close the lower switch valve; open the sealing mechanism of the middle pipeline, and add the second quantitative acid in the acid tube into the battery (at this time, all the acid required by the battery is added to the battery), and the second acid addition is completed.

[0224] S05: Acid quantitative addition: close the sealing mechanism of the middle pipeline, and add the acid quantitatively in the acid tube; vacuumize the battery: vacuumize the battery to -0.03MPa, and close the lower switch valve; open the sealing mechanism of the middle pipeline, and add the third quantitative amount of acid in the acid tube into the battery (at this time, all the acid required by the battery is added to the battery), and the acid addition is completed 3 times.

[0225] S06: Acid quantitative addition: close the sealing mechanism of the middle pipeline, and add the acid quantitatively in the acid tube; vacuumize the battery: vacuumize the battery to -0.03MPa, and close the lower switch valve; open the sealing mechanism of the middle pipeline, and add the fourth quantitative amount of acid in the acid tube into the battery (at this time, all the acid required by the battery is added to the battery), and the 4 acid additions are completed.

[0226] S07: Final acid addition: let it stand to ensure that all the acid flows into the rich liquid pot;

[0227] S08: Close the sealing mechanism of the middle pipe, open the lower exhaust valve to release air, then close the lower exhaust valve, lift the head of the acid adding machine to separate the acid adding pot and the battery, and the entire acid adding is completed.

[0228] The first, second and third amounts of acid added in this comparative example are 8%, 40%, 40% and 12% of the total amount of acid required for the battery, respectively.

[0229] Test Example 1

[0230] Different 48V20H lead-acid batteries were prepared by different methods, the only difference being that the acid addition methods of Example 2, Example 3, Example 4, Example 5 and Comparative Examples 1-4 were used to prepare the 48V20H lead-acid batteries, respectively, and other methods and conditions were the same.

[0231] The cycle life of the prepared battery was tested and the results are shown in Table 1.

[0232] Table 1

[0233]

[0234] It can be seen from the results of Examples 2-5 in Table 1 that the cycle life of the battery is related to the number of times of acid addition, and the more times of acid addition, the longer the cycle life. It can be seen from the comparison between Comparative Example 1 and Example 2, Comparative Example 2 and Example 3, Comparative Example 3 and Example 4, and Comparative Example 4 and Example 5 that the battery cycle life is longer when the battery 16 and the acid transition tube body 2 are respectively vacuumed by the present invention.

[0235] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A battery acid filling machine, characterized in that: The acid adding machine comprises an acid fixing pipe and an acid transition pipe arranged from bottom to top, wherein the acid transition pipe comprises a first pipe, a second pipe and an acid transition pipe body, wherein the upper end of the acid transition pipe body is connected to the lower end of the acid fixing pipe through the first pipe, the lower end of the acid transition pipe body is connected to the upper end of the second pipe, the lower end of the second pipe has an acid outlet, and the lower end of the acid transition pipe body is connected to the battery through the acid outlet; The first pipeline is provided with an upper pipeline sealing mechanism, and the upper pipeline sealing mechanism is located above the acid transition pipe body. The first pipeline is also connected to a first vacuum pipe, one end of which is connected to the acid transition pipe body, and the first vacuum pipe is in communication with the acid transition pipe body. The second pipeline is fixedly connected with a middle pipeline sealing mechanism and a lower pipeline sealing mechanism in sequence from top to bottom. The second pipeline is also connected with a second vacuum pumping pipe, and the second vacuum pumping pipe is connected between the middle pipeline sealing mechanism and the acid outlet.

2. The battery acid filling machine according to claim 1, characterized in that: The first vacuum tube is also provided with an upper switch valve for closing and connecting the first vacuum tube and the vacuum pump, and the second vacuum tube is also provided with a lower switch valve for closing and connecting the second vacuum tube and the vacuum pump.

3. The battery acid filling machine according to claim 2, characterized in that: The first vacuum pumping tube and the second vacuum pumping tube are respectively provided with a first vacuum degree detector and a second vacuum degree detector.

4. The battery acid filling machine according to claim 1, characterized in that: The first vacuum pipe is connected to the acid transition pipe body through the first pipeline.

5. The battery acid filling machine according to claim 1, characterized in that: The first pipeline, the second pipeline and the acid transition pipe body are all cylindrical hole-shaped, and the inner diameter of the acid transition pipe body is larger than the inner diameter of the first pipeline and the inner diameter of the second pipeline.

6. The battery acid filling machine according to claim 1, characterized in that: The second vacuum tube is provided with an acid reflux prevention tube, and the acid reflux prevention tube is formed by enlarging the inner diameter of a portion of the second vacuum tube.

7. The battery acid filling machine according to claim 6, characterized in that: The acid reflux prevention pipe is arranged at the upper end of the second vacuum pipe close to the middle pipe sealing mechanism, and its function is to prevent the acid in the battery from flowing back when the battery is vacuumed.

8. A battery acid filling machine according to claim 1, characterized in that: The first vacuum pipe is also provided with an upper pressure regulating valve, and the second vacuum pipe is also provided with a lower pressure regulating valve.

9. The battery acid filling machine according to claim 1, characterized in that: The first vacuum pumping tube and the second vacuum pumping tube are connected in parallel and then connected to the vacuum pump through the third vacuum pumping tube.

10. The battery acid filling machine according to claim 9, characterized in that: The third vacuum pumping pipe is provided with a medium pressure regulating valve.

11. A battery acid filling machine according to claim 1, characterized in that: The lower pipe sealing mechanism is arranged between the second vacuum pipe and the acid outlet, and is used to prevent the acid in the second pipe from flowing out when the acid adding machine is lifted and the second pipe is separated from the battery.

12. The battery acid filling machine according to any one of claims 1 to 11, characterized in that: The first vacuum pumping pipe is also provided with an upper exhaust valve, and the second vacuum pumping pipe is also provided with a lower exhaust valve.

13. A method for adding acid to a battery, characterized in that: The steps include: S0: storing the acid in the fixed acid tube, adding the first quantitative amount of the acid stored in the fixed acid tube into the acid transition tube body, and performing vacuum treatment on the acid transition tube body and the battery respectively; S1: First acid addition: Add the first quantitative amount of acid in the acid transition tube body to the battery, and the first acid addition is completed; S2: Secondary acid addition: vacuum treatment is performed on the acid transition tube body and the battery respectively, the sealing mechanism of the middle pipeline is opened, and the acid in the acid transition tube body is added to the battery, and the secondary acid addition is completed; When adding acid for the first time, the difference between the vacuum value of the acid transition tube body and the vacuum value of the battery is smaller than the difference between the vacuum value of the acid transition tube body and the vacuum value of the battery when adding acid for the second time in step S2.

14. A battery acid adding method according to claim 13, characterized in that: The specific steps include: S1: First acid addition: Open the sealing mechanism of the middle pipe, add the first quantitative amount of acid in the acid transition pipe body into the battery, and the first acid addition is completed.

15. A method for adding acid to a battery, characterized in that: The steps include: S0: storing the acid in the acid-fixing tube, adding the acid stored in the acid-fixing tube into the acid transition tube body, and performing vacuum treatment on the acid transition tube body and the battery respectively; S1: First acid addition: Open the sealing mechanism of the middle pipe, add the acid in the acid transition pipe body into the battery, and the first acid addition is completed; When acid is added multiple times, the first acid addition amount shall not exceed 15% of the total acid amount, and the vacuum value inside the battery shall be -0.09Mpa to -0.05Mpa.

16. A battery acid adding method according to claim 13 or 15, characterized in that: The specific steps include: S0: Close the upper pipe sealing mechanism and the middle pipe sealing mechanism, store the acid in the fixed acid pipe, open the upper pipe sealing mechanism to allow the acid in the fixed acid pipe to flow quantitatively into the acid transition pipe body for the first time, then close the upper pipe sealing mechanism, and perform vacuum treatment on the acid transition pipe body and the battery respectively.

17. The battery acid adding method according to claim 15, characterized in that: The method also includes S2: secondary acid addition: closing the middle pipe sealing mechanism, opening the upper pipe sealing mechanism, allowing the second quantitative acid in the fixed acid pipe to flow into the acid transition pipe body, then closing the upper pipe sealing mechanism, performing vacuum treatment on the acid transition pipe body and the battery respectively, opening the middle pipe sealing mechanism, adding the second quantitative acid in the acid transition pipe body into the battery, and completing the secondary acid addition.

18. The battery acid adding method according to claim 13 or 17, characterized in that: The method further comprises S3: adding acid three times: repeating the operation of step S2 to complete adding acid three times.

19. The battery acid adding method according to claim 18, characterized in that: The method further comprises S4: adding acid four times: repeating the operation of step S2 to complete adding acid four times.

20. The battery acid adding method according to claim 19, characterized in that: Also includes S6: the battery is vented, the acid filling machine is raised, and the acid filling is completed.

21. The battery acid adding method according to claim 20, characterized in that: Before S6, it also includes the final acid addition in S5: let it stand to ensure that all the acid flows into the rich liquid pot.

22. The battery acid adding method according to claim 13 or 17, characterized in that: The quantitative amount of acid in the acid transition tube body during the first acid addition in step S1 is less than the quantitative amount of acid in the acid transition tube body during the second acid addition in step S2.

23. A battery formation method, characterized in that: The method for adding acid to a battery comprises the method according to claim 13 or 15.

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