A colloidal battery internalized colloidal electrolyte, preparation method and internalization process

Abstract

The present application discloses a colloidal electrolyte for internalization of a colloidal battery, relating to the technical field of colloidal lead-acid batteries, and includes the following components by weight: 300-600 parts of sulfuric acid; 100-300 parts of pure water; 40 parts of fumed silica; The present application also relates to a method for preparing the electrolyte, comprising the following steps: slowly adding sulfuric acid to pure water while stirring according to the formula amount to form an acid solution; and adding fumed silica to the acid solution while shearing according to the formula amount to form a colloidal electrolyte. The colloidal electrolyte of the present application realizes direct internalization of the colloidal battery, shortens the process flow, reduces intermediate steps, eliminates the generation of waste acid in the process, greatly reduces environmental pressure and management costs, and reduces the overall cost of the product. The final acid density and colloidal state meet the requirements of the battery's use / type.

Description

Technical Field

[0001] The present application relates to the technical field of colloidal lead-acid batteries, and in particular to a colloidal electrolyte internalized in a colloidal battery, a preparation method and an internalization process. Background Art

[0002] Lead-acid batteries are recyclable due to their low price, mature technology, and stable performance. Green and low-carbon development has become a key word for high-quality industrial development in China and globally. The innovation of new power systems based on new energy, coupled with the continuous improvement of deep-cycle technology, will continue to drive the widespread application of lead-acid batteries. Therefore, lead-acid batteries will continue to hold the largest share of the secondary power supply market for a long time to come. Colloidal lead-acid batteries are widely used in communications systems, power systems, and new energy storage due to their long cycle life, excellent deep-discharge recovery performance, and strong temperature adaptability.

[0003] Currently, colloidal battery production by various manufacturers remains stuck in the same state from 20 years ago, with no process innovation: either external plate formation followed by battery assembly, or using green plates, followed by acid addition, charging, and formation, followed by acid degassing and subsequent colloidal injection. Both methods are complex and generate large amounts of waste acid, placing significant environmental pressure and management costs. Therefore, scientific design is crucial to shorten the process, reduce intermediate steps, and lower overall product costs, as is researching colloidal formulations for direct internal formation of colloidal batteries. Summary of the Invention

[0004] In order to solve at least one of the above technical problems, a colloid formula for internalization of a colloid battery is developed. The present application provides a colloid electrolyte for internalization of a colloid battery, a preparation method and an internalization process.

[0005] In one aspect, the present application provides a colloidal electrolyte for a colloidal lead-acid battery, comprising the following components in parts by weight:

[0006] 300-600 parts of sulfuric acid;

[0007] 100-300 parts of pure water;

[0008] 40 parts of fumed silica.

[0009] Optionally, for a 2V colloidal lead-acid battery, the present application provides a colloidal electrolyte for a colloidal lead-acid battery, comprising the following components in parts by weight:

[0010] 300 parts of sulfuric acid;

[0011] 250-300 parts of pure water;

[0012] 40 parts of fumed silica.

[0013] Optionally, for a 12V colloidal lead-acid battery, the present application provides a colloidal electrolyte for a colloidal lead-acid battery, comprising the following components in parts by weight:

[0014] 600 parts of sulfuric acid;

[0015] 100-200 parts of pure water;

[0016] 40 parts of fumed silica.

[0017] Optionally, the density of the sulfuric acid is 1.31 g / ml.

[0018] In a second aspect, the present application provides a method for preparing the above-mentioned electrolyte, comprising the following steps:

[0019] S1. Slowly add sulfuric acid to pure water while stirring according to the formula to form an acid solution;

[0020] S2. According to the formula, the fumed silica is added to the acid solution while being cut to form a colloidal electrolyte.

[0021] Optionally, in S2, the reaction temperature is controlled so that the temperature of the colloidal electrolyte is controlled to be no more than 10°C.

[0022] Optionally, in S2, the reaction temperature is controlled by circulating in a low-temperature water bath.

[0023] In a third aspect, for a 2V colloidal lead-acid battery, the present application provides an internal formation process for a colloidal lead-acid battery, wherein the electrolyte according to claim 2 is added to the battery by vacuum infusion, and the internal formation process comprises the following steps:

[0024] (1) First charging stage: charging at 17A for 3h, with a charge of 51Ah;

[0025] (2) Second charging stage: charging at 70A for 6 hours, with a charge of 420Ah;

[0026] (3) Three-stage charging: charging at 45A for 10h, with a total charge of 450Ah;

[0027] (4) First discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah;

[0028] (5) Fourth charging stage: charging at 70A for 6h, with a charge of 420Ah;

[0029] (6) Second discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah;

[0030] (7) Five-charge stage: charging at 70A for 12h, charging a total of 840Ah;

[0031] (8) Sixth charging stage: charging at 45A for 15h, with a total charge of 675Ah;

[0032] (9) Third discharge stage: discharge at 45A for 3h, with a discharge capacity of 135Ah;

[0033] (10) Seventh charging stage: charging at 70A for 12h, with a total charge of 840Ah;

[0034] (11) Eighth charging stage: charging at 35A for 10h, with a total charge of 350Ah.

[0035] In a fourth aspect, for a 2V colloidal lead-acid battery, the present application provides an internal formation process for the colloidal lead-acid battery, wherein the electrolyte according to claim 3 is added to the battery by vacuum infusion, and the internal formation process comprises the following steps:

[0036] (1) First charging stage: charging at 5A current for 4h, charging capacity is 20Ah;

[0037] (2) Second charging stage: charging at 20A for 12h, with a total charge of 240Ah;

[0038] (3) Three-stage charging: charging at 10A for 4 hours, with a charge of 40Ah;

[0039] (4) First discharge stage: discharge at 10A current for 1h, discharge capacity is 10Ah;

[0040] (5) Fourth charging stage: charging at 20A current for 9h, charging capacity is 180Ah;

[0041] (6) Five-charge stage: charging at 10A current for 4h, charging capacity is 40Ah;

[0042] (7) Second discharge stage: discharge at 15A for 2h, with a discharge capacity of 30Ah;

[0043] (8) Sixth charging stage: charging at 20A current for 8h, charging capacity is 160Ah;

[0044] (9) Seventh charging stage: charging at 10A current for 4h, charging a total of 40Ah;

[0045] (10) Third discharge stage: discharge at 20A current for 2.5h, discharge capacity is 50Ah;

[0046] (11) Eighth charging stage: charging at 20A current for 5h, charging capacity is 100Ah;

[0047] (12) Nine charging stages: First, charge at 10A for 6 hours, with a total charge of 60Ah.

[0048] In summary, the colloidal electrolyte of this application enables direct internalization of colloidal batteries, shortening the process flow, reducing intermediate steps, and eliminating the generation of waste acid. This significantly reduces environmental pressure and management costs, and lowers the overall cost of the product. The final acid density and colloidal state meet the requirements of the battery's application / type. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a cycle curve diagram of the 12V colloidal battery in Example 5. DETAILED DESCRIPTION

[0050] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0051] Unless otherwise specified, all materials involved in this application were purchased from commercially available products.

[0052] The fumed silica is from Degussa of Germany.

[0053] Preparation Example

[0054] Preparation Examples 1 to 6 are used to prepare different colloidal electrolytes.

[0055] Preparation Example 1

[0056] 300 kg was slowly added to 250 kg of pure water while stirring to form an acid solution; 40 kg of fumed silica was added to the acid solution while shearing. During the addition process, the reaction temperature was controlled not to exceed 10°C by circulating in a low-temperature water bath to form a colloidal electrolyte.

[0057] Preparation Example 2

[0058] 300 kg was slowly added to 300 kg of pure water while stirring to form an acid solution; 40 kg of fumed silica was added to the acid solution while shearing. During the addition process, the reaction temperature was controlled not to exceed 10°C by circulating in a low-temperature water bath to form a colloidal electrolyte.

[0059] Preparation Example 3

[0060] 300 kg was slowly added to 350 kg of pure water while stirring to form an acid solution; 40 kg of fumed silica was added to the acid solution while shearing. During the addition process, the reaction temperature was controlled not to exceed 10°C by circulating in a low-temperature water bath to form a colloidal electrolyte.

[0061] Preparation Example 4

[0062] 600 kg was slowly added to 100 kg of pure water while stirring to form an acid solution; 40 kg of fumed silica was added to the acid solution while shearing. During the addition process, the reaction temperature was controlled not to exceed 10°C by circulating in a low-temperature water bath to form a colloidal electrolyte.

[0063] Preparation Example 5

[0064] 600 kg was slowly added to 150 kg of pure water while stirring to form an acid solution; 40 kg of fumed silica was added to the acid solution while shearing. During the addition process, the reaction temperature was controlled not to exceed 10°C by circulating in a low-temperature water bath to form a colloidal electrolyte.

[0065] Preparation Example 6

[0066] 600 kg was slowly added to 200 kg of pure water while stirring to form an acid solution; 40 kg of fumed silica was added to the acid solution while shearing. During the addition process, the reaction temperature was controlled not to exceed 10°C by circulating in a low-temperature water bath to form a colloidal electrolyte.

[0067] After the colloidal electrolytes in Preparation Examples 1 to 6 were prepared, they were tested as follows:

[0068] Gel time detection:

[0069] Take the prepared finished glue solution and place it in a test tube with a height of ≥400mm;

[0070] After 100 minutes, add a small lead ball with a diameter of 4.5 mm every 3 minutes (freely falling vertically at a height of 25 cm from the liquid surface);

[0071] Record the time until the lead ball is independently suspended in the gelatin solution for two consecutive times at an interval of 3 minutes and cannot sink to the bottom of the test tube; the requirement is: the gelatin solution gel time ≥ 120 minutes.

[0072] Detection of colloid viscosity:

[0073] Block the glue hole at the bottom of the volt cup (Leoch cup);

[0074] Pour the prepared glue into the volt cup until the glue is flush with the upper edge of the volt cup;

[0075] Open the glue outlet at the bottom of the voltaic cup and start timing, recording the time it takes for the glue to completely flow out;

[0076] The required time is ≤15S.

[0077] Colloidal liquid dispersion test:

[0078] Add the prepared finished glue solution into the colloid dispersion detection device to 25ml;

[0079] Slowly push the colloidal liquid dispersion detection device, and the colloidal liquid is qualified if all the colloidal liquid passes through.

[0080] The measured data of the colloidal electrolytes in Preparation Examples 1 to 6 are shown in Table 1.

[0081] Table 1

[0082]

[0083] Specific embodiments

[0085] Example 1

[0086] The electrolyte prepared in Preparation Example 1 was added to the battery by vacuum infusion. The infusion process is shown in Table 2.

[0087] Table 2

[0088] Battery Model Vacuum times First vacuum time / s Other vacuum time / s Air time / s Glue extraction time / s Gluing time / s 2V 4 ≥30 ≥20 ≥15 ≥14 ≥10

[0089] When pouring colloidal electrolyte, the vacuum pressure should be ≥90Kpa.

[0090] The internalization process includes the following steps:

[0091] (1) First charging stage: charging at 17A for 3h, with a charge of 51Ah;

[0092] (2) Second charging stage: charging at 70A for 6 hours, with a charge of 420Ah;

[0093] (3) Three-stage charging: charging at 45A for 10h, with a total charge of 450Ah;

[0094] (4) First discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah;

[0095] (5) Fourth charging stage: charging at 70A for 6h, with a charge of 420Ah;

[0096] (6) Second discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah;

[0097] (7) Five-charge stage: charging at 70A for 12h, charging a total of 840Ah;

[0098] (8) Sixth charging stage: charging at 45A for 15h, with a total charge of 675Ah;

[0099] (9) Third discharge stage: discharge at 45A for 3h, with a discharge capacity of 135Ah;

[0100] (10) Seventh charging stage: charging at 70A for 12h, with a total charge of 840Ah;

[0101] (11) Eighth charging stage: charging at 35A for 10h, with a total charge of 350Ah.

[0102] Example 2

[0103] The electrolyte prepared in Preparation Example 2 was added to the battery by vacuum infusion. The infusion process is shown in Table 3.

[0104] Table 3

[0105] Battery Model Vacuum times First vacuum time / s Other vacuum time / s Air time / s Glue extraction time / s Gluing time / s 2V 4 ≥30 ≥20 ≥15 ≥14 ≥10

[0106] When pouring colloidal electrolyte, the vacuum pressure should be ≥90Kpa.

[0107] The internalization process includes the following steps:

[0108] (1) First charging stage: charging at 17A for 3h, with a charge of 51Ah;

[0109] (2) Second charging stage: charging at 70A for 6 hours, with a charge of 420Ah;

[0110] (3) Three-stage charging: charging at 45A for 10h, with a total charge of 450Ah;

[0111] (4) First discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah;

[0112] (5) Fourth charging stage: charging at 70A for 6h, with a charge of 420Ah;

[0113] (6) Second discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah;

[0114] (7) Five-charge stage: charging at 70A for 12h, charging a total of 840Ah;

[0115] (8) Sixth charging stage: charging at 45A for 15h, with a total charge of 675Ah;

[0116] (9) Third discharge stage: discharge at 45A for 3h, with a discharge capacity of 135Ah;

[0117] (10) Seventh charging stage: charging at 70A for 12h, with a total charge of 840Ah;

[0118] (11) Eighth charging stage: charging at 35A for 10h, with a total charge of 350Ah.

[0119] Example 3

[0120] The electrolyte prepared in Preparation Example 3 was added to the battery by vacuum infusion. The infusion process is shown in Table 4.

[0121] Table 4

[0122] Battery Model Vacuum times First vacuum time / s Other vacuum time / s Air time / s Glue extraction time / s Gluing time / s 2V 4 ≥30 ≥20 ≥15 ≥14 ≥10

[0123] When pouring colloidal electrolyte, the vacuum pressure should be ≥90Kpa.

[0124] The internalization process includes the following steps:

[0125] (1) First charging stage: charging at 17A for 3h, with a charge of 51Ah;

[0126] (2) Second charging stage: charging at 70A for 6 hours, with a charge of 420Ah;

[0127] (3) Three-stage charging: charging at 45A for 10h, with a total charge of 450Ah;

[0128] (4) First discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah;

[0129] (5) Fourth charging stage: charging at 70A for 6h, with a charge of 420Ah;

[0130] (6) Second discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah;

[0131] (7) Five-charge stage: charging at 70A for 12h, charging a total of 840Ah;

[0132] (8) Sixth charging stage: charging at 45A for 15h, with a total charge of 675Ah;

[0133] (9) Third discharge stage: discharge at 45A for 3h, with a discharge capacity of 135Ah;

[0134] (10) Seventh charging stage: charging at 70A for 12h, with a total charge of 840Ah;

[0135] (11) Eighth charging stage: charging at 35A for 10h, with a total charge of 350Ah.

[0136] Example 4

[0137] The electrolyte prepared in Preparation Example 4 was added to the battery by vacuum infusion. The infusion process is shown in Table 5.

[0138] Table 5

[0139]

[0140]

[0141] When pouring colloidal electrolyte, the vacuum pressure should be ≥90Kpa.

[0142] The internalization process includes the following steps:

[0143] (1) First charging stage: charging at 5A current for 4h, charging capacity is 20Ah;

[0144] (2) Second charging stage: charging at 20A for 12h, with a total charge of 240Ah;

[0145] (3) Three-stage charging: charging at 10A for 4 hours, with a charge of 40Ah;

[0146] (4) First discharge stage: discharge at 10A current for 1h, discharge capacity is 10Ah;

[0147] (5) Fourth charging stage: charging at 20A current for 9h, charging capacity is 180Ah;

[0148] (6) Five-charge stage: charging at 10A current for 4h, charging capacity is 40Ah;

[0149] (7) Second discharge stage: discharge at 15A for 2h, with a discharge capacity of 30Ah;

[0150] (8) Sixth charging stage: charging at 20A current for 8h, charging capacity is 160Ah;

[0151] (9) Seventh charging stage: charging at 10A for 4 hours, with a charge of 40Ah;

[0152] (10) Third discharge stage: discharge at 20A current for 2.5h, discharge capacity is 50Ah;

[0153] (11) Eighth charging stage: charging at 20A current for 5h, charging capacity is 100Ah;

[0154] (12) Nine charging stages: First, charge at 10A for 6 hours, with a total charge of 60Ah.

[0155] Example 5

[0156] The electrolyte prepared in Preparation Example 5 was added to the battery by vacuum infusion. The infusion process is shown in Table 6.

[0157] Table 6

[0158] Battery Model Vacuum times First vacuum time / s Other vacuum time / s Air time / s Glue extraction time / s Gluing time / s 12V 3 ≥30 ≥15 ≥10 ≥14 ≥10

[0159] When pouring colloidal electrolyte, the vacuum pressure should be ≥90Kpa.

[0160] The internalization process includes the following steps:

[0161] (1) First charging stage: charging at 5A current for 4h, charging capacity is 20Ah;

[0162] (2) Second charging stage: charging at 20A for 12h, with a total charge of 240Ah;

[0163] (3) Three-stage charging: charging at 10A for 4 hours, with a charge of 40Ah;

[0164] (4) First discharge stage: discharge at 10A current for 1h, discharge capacity is 10Ah;

[0165] (5) Fourth charging stage: charging at 20A current for 9h, charging capacity is 180Ah;

[0166] (6) Five-charge stage: charging at 10A current for 4h, charging capacity is 40Ah;

[0167] (7) Second discharge stage: discharge at 15A for 2h, with a discharge capacity of 30Ah;

[0168] (8) Sixth charging stage: charging at 20A current for 8h, charging capacity is 160Ah;

[0169] (9) Seventh charging stage: charging at 10A current for 4h, charging a total of 40Ah;

[0170] (10) Third discharge stage: discharge at 20A current for 2.5h, discharge capacity is 50Ah;

[0171] (11) Eighth charging stage: charging at 20A current for 5h, charging capacity is 100Ah;

[0172] (12) Nine charging stages: First, charge at 10A for 6 hours, with a total charge of 60Ah.

[0173] Example 6

[0174] The electrolyte prepared in Preparation Example 6 was added to the battery by vacuum infusion. The infusion process is shown in Table 7.

[0175] Table 7

[0176] Battery Model Vacuum times First vacuum time / s Other vacuum time / s Air time / s Glue extraction time / s Gluing time / s 12V 3 ≥30 ≥15 ≥10 ≥14 ≥10

[0177] When pouring colloidal electrolyte, the vacuum pressure should be ≥90Kpa.

[0178] The internalization process includes the following steps:

[0179] (1) First charging stage: charging at 5A current for 4h, charging capacity is 20Ah;

[0180] (2) Second charging stage: charging at 20A for 12h, with a total charge of 240Ah;

[0181] (3) Three-stage charging: charging at 10A for 4 hours, with a charge of 40Ah;

[0182] (4) First discharge stage: discharge at 10A current for 1h, discharge capacity is 10Ah;

[0183] (5) Fourth charging stage: charging at 20A current for 9h, charging capacity is 180Ah;

[0184] (6) Five-charge stage: charging at 10A current for 4h, charging capacity is 40Ah;

[0185] (7) Second discharge stage: discharge at 15A for 2h, with a discharge capacity of 30Ah;

[0186] (8) Sixth charging stage: charging at 20A current for 8h, charging capacity is 160Ah;

[0187] (9) Seventh charging stage: charging at 10A for 4 hours, with a charge of 40Ah;

[0188] (10) Third discharge stage: discharge at 20A current for 2.5h, discharge capacity is 50Ah;

[0189] (11) Eighth charging stage: charging at 20A current for 5h, charging capacity is 100Ah;

[0190] (12) Nine charging stages: First, charge at 10A for 6 hours, with a total charge of 60Ah.

[0191] After the formation charge of Examples 1 to 6 was completed, the state of the colloid was observed.

[0192] The colloidal electrolyte of Preparation Example 1 was too dry and had large cracks. The colloidal electrolyte of Preparation Example 6 gradually became partially "hydrated" after being stored for a period of time, which was not suitable for colloidal applications. The colloidal electrolytes of Preparation Examples 2 to 5 were in good condition and had good thixotropy.

[0193] The density of the colloidal electrolytes of Examples 1 to 6 was measured according to the following measurement method to determine the final acid content of the colloidal electrolytes and thus the final acid content of the battery.

[0194] The method for measuring the density of colloidal electrolyte is briefly described as follows:

[0195] Stirring the prepared colloidal electrolyte into a semi-colloidal state;

[0196] Filtering the stirred electrolyte to obtain a preliminary sulfuric acid electrolyte;

[0197] Allow the preliminary sulfuric acid electrolyte obtained by filtration to stand;

[0198] Filtering, filtering the sulfuric acid electrolyte after standing to obtain dilute sulfuric acid;

[0199] The detection and calculation are carried out by detecting the mass and volume of the dilute sulfuric acid or obtaining the density of the electrolyte by titration.

[0200] The acid density of the colloidal electrolyte of Preparation Example 3 was relatively low, the acid density of the colloidal electrolyte of Preparation Example 4 was relatively high, and the state and acid content of the colloidal electrolytes of Preparation Examples 2 and 5 were qualified.

[0201] Four samples of each of the batteries prepared in Example 2 and Example 5 were taken for performance testing to test battery capacity, sealing reaction efficiency, low temperature sensitivity, overdischarge, capacity retention, and other items. The test results are shown in Table 8.

[0202] Table 8

[0203]

[0204] The 12V colloidal battery in Example 5 with relatively small capacity margin was selected for life cycle. During the initial cycle, the capacity increased steadily and then gradually decreased. After more than 300 cycles, it still retained 90% of the rated capacity. The cycle curve is shown in FIG. Figure 1 As shown, it meets the battery capacity requirements of the YD / T1360-2005 standard for valve-controlled sealed colloid batteries for communications.

[0205] The colloidal electrolytes in Preparation Examples 2 and 5 of this application are suitable for 2V and 12V series batteries, respectively. That is, at these sulfuric acid and fumed silica contents, the final acid density and colloidal state meet the requirements of the battery's use / type. The colloidal electrolytes of this application achieve direct internalization of the colloidal battery, shortening the process flow, reducing intermediate steps, and eliminating the generation of waste acid in the process, greatly reducing environmental pressure and management costs, and lowering the overall cost of the product.

[0206] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An internal formation process for a colloidal lead-acid battery, characterized in that: An electrolyte is added to the battery by vacuum infusion, wherein the electrolyte comprises the following components in parts by weight: 300 parts of sulfuric acid; 300 parts of pure water; 40 parts of fumed silica; the density of the sulfuric acid is 1.31 g / ml; The internalization process comprises the following steps: (1) First charging stage: charging at 17A for 3h, with a total charge of 51Ah; (2) Second charging stage: charging at 70A for 6 hours, with a total charge of 420Ah; (3) Three-stage charging: charging at 45A for 10h, with a total charge of 450Ah; (4) First discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah; (5) Fourth charging stage: charging at 70A for 6 hours, with a total charge of 420Ah; (6) Second discharge stage: discharge at 45A for 2h, with a discharge capacity of 90Ah; (7) Five-charge stage: charging at 70A for 12h, with a total charge of 840Ah; (8) Sixth charging stage: charging at 45A for 15h, with a total charge of 675Ah; (9) Third discharge stage: discharge at 45A for 3h, with a discharge capacity of 135Ah; (10) Seventh charging stage: charging at 70A for 12h, with a total charge of 840Ah; (11) Eighth charging stage: charging at 35A current for 10h, with a total charge of 350Ah.

2. An internal formation process for a colloidal lead-acid battery according to claim 1, characterized in that: The preparation method of the electrolyte comprises the following steps: S1. Slowly add sulfuric acid to pure water while stirring according to the formula to form an acid solution; S2. According to the formula, the fumed silica is added to the acid solution while being cut to form a colloidal electrolyte.

3. An internal formation process for a colloidal lead-acid battery according to claim 2, characterized in that: In S2, the reaction temperature is controlled so that the temperature of the colloidal electrolyte is controlled to be no more than 10°C.

4. An internal formation process for a colloidal lead-acid battery according to claim 3, characterized in that: In S2, the reaction temperature is controlled by circulating a low-temperature water bath.

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