High-safety aluminum-based lead carbon battery charging control method and system

Abstract

The invention provides a charging control method and system for a high-safety aluminum-based lead-carbon battery, and belongs to the technical field of energy storage and battery charging. The charging control method and system for the high-safety aluminum-based lead-carbon battery can charge the high-safety aluminum-based lead-carbon battery according to the electron absorption capacity and the voltage endurance capacity of the aluminum-based lead-carbon battery in the charging process; and the action time of overcurrent and overvoltage on the target battery is reduced, so that the damage to the battery is reduced, the attenuation of the battery is delayed, the purpose of prolonging the service life of the battery is finally achieved, and meanwhile, the energy conversion and utilization efficiency of the aluminum-based lead carbon battery is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage and battery charging, and particularly to a charging control method and system for a high-safety aluminum-based lead-carbon battery. Background Art

[0002] In recent years, in order to address the global climate change issue, the global green energy has been developing vigorously. The installed capacities of renewable energies such as solar energy and wind energy have been continuously increasing, the costs have been continuously decreasing, and the market competitiveness has been increasingly enhanced. However, problems such as instability and discontinuity of green energies such as solar energy and wind energy still exist. Therefore, new opportunities have emerged for the development of batteries such as lithium iron phosphate, lead-carbon, and zinc-nickel in the energy storage field.

[0003] As a high-safety chemical battery, the high-safety aluminum-based lead-carbon battery technology has been developed for more than 160 years so far. However, the problems of rapid attenuation of its use performance and insufficient battery life have become a bottleneck for its in-depth development in the energy storage field.

[0004] Therefore, the present invention provides a two-stage voltage-dividing discharge-type charging control method and system to reduce the problem of rapid capacity attenuation of lead-carbon batteries caused by over-electrons and high voltage in traditional charging methods, so as to improve the service life of lead-carbon batteries.

[0005] The information disclosed in this background art section is only intended to enhance the overall understanding of the present invention and should not be regarded as an admission or any form of implication that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Invention

[0006] The object of the present invention is to provide a technical solution that can solve the problem of rapid capacity attenuation of lead-carbon batteries caused by over-electrons and high voltage in traditional charging methods.

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

[0008] A charging control method for a high-safety aluminum-based lead-carbon battery, comprising:

[0009] S1: Determine the target battery charging base current according to the comparison of the target battery system capacity state, the allowable charging time of the application scenario and the manually set value, and the value of the charging base current is between 0.1C and 0.3C of the battery capacity;

[0010] S2: Charge the battery to the first-stage constant voltage control point of the lead-carbon battery system under the initial base current control;

[0011] S3: When the battery is charged at a constant current with the base current until reaching the first-stage constant voltage control point of the single aluminum-based lead-carbon battery system, the charging current of the battery is gradually reduced according to the electron absorption capacity of the battery until the full charge cut-off current of the battery at the first-stage constant voltage control point;

[0012] S4: After the battery system reaches the full charge cut-off current of the battery during the discharging charging process at the first-stage constant voltage point, the system adjusts the charging voltage of the battery to the second-stage constant voltage control point;

[0013] S5: The system stops when the battery is charged to the second-stage constant voltage control point with the full charge cut-off current.

[0014] Optionally, the first-stage average constant voltage control point of the single cell is 2.30V - 2.34V;

[0015] The base value of the charging current of the first-stage battery system is 0.1C - 0.3C;

[0016] The second-stage average voltage control point of the single cell is 2.35V - 2.40V;

[0017] The second-stage full charge cut-off current value is 0.015C of the battery capacity.

[0018] A high-safety aluminum-based lead-carbon battery charging control system includes:

[0019] The first-stage discharging constant voltage charging module is used to charge the battery to the first-stage battery constant voltage with the base current, and then start to reduce the current according to the electron absorption capacity of the battery to reduce the damage to the battery caused by saturated excessive electrons;

[0020] The second-stage cut-off current constant current charging module is used to charge the battery at a constant current with the full charge cut-off current of the battery until the second-stage constant voltage stop, to reduce the damage to the battery caused by overvoltage and saturated electrons.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The high-safety aluminum-based lead-carbon battery charging control method and system provided by the present invention can reduce the action time of overcurrent and overvoltage on the target battery according to the electron absorption capacity and voltage tolerance of the aluminum-based lead-carbon battery during the charging process, thereby reducing the damage to the battery, delaying the battery attenuation, finally achieving the purpose of improving the service life of the battery, and at the same time improving the energy conversion and utilization efficiency of the aluminum-based lead-carbon battery. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Schematic diagram for explaining the control flow of the charging method provided by the embodiment of the present invention.

[0025] Figure 2 Flow chart of charging control in Embodiment 1 in the optical storage environment charging control provided by the embodiment of the present invention.

[0026] Figure 3 Control flow chart provided for Embodiment 2 of the present invention. Specific implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a technical solution that can solve the problem of rapid capacity decay of lead-carbon batteries caused by over-electrons and high voltage in traditional charging methods.

[0029] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0030] Embodiment 1:

[0031] This embodiment provides a high-safety aluminum-based lead-carbon battery charging control method and system, as Figure 1 shown, the method includes:

[0032] Step1: Determine the target battery charging base current by comparing the target battery system capacity state, the allowable charging time of the application scenario, and the manually set value. The value of the charging base current is generally between 0.1C and 0.3C of the battery capacity;

[0033] Step2: First charge the battery to the first-stage constant voltage control point of the lead-carbon battery system under the initial base current control according to the charge and discharge method of the battery;

[0034] Step 3: When the battery is charged at a constant current with the base current until it reaches the first-stage constant voltage control point of the single-cell aluminum-based lead-carbon battery system, at the first-stage constant voltage control point, start gradually reducing the charging current of the battery according to the battery's electron absorption ability until the full-charge cut-off current of the battery is reached;

[0035] Step 4: After the battery system reaches the full-charge cut-off current of the battery during the discharging-type charging at the first-stage constant voltage point, the system adjusts the charging voltage of the battery to the second-stage constant voltage control point.

[0036] Step 5: The system stops when the battery is charged to the second-stage constant voltage control point with the full-charge cut-off current.

[0037] As Figure 2 shown, Step 1 is the photovoltaic variable-current charging stage under the base constant-current control; Step 2 is the first-stage constant voltage control point, and the average single-cell battery voltage of the system is 2.32 V; Step 3 is the active current reduction stage; the second-stage constant current control point in Step 4, and the average single-cell battery voltage of the system is 2.35 V; Step 5 is the constant-current charging stage at the cut-off current.

[0038] Embodiment 2:

[0039] This embodiment provides a high-safety aluminum-based lead-carbon battery charging control method, including:

[0040] Step 1: Determine the target battery charging base current by comparing the target battery system capacity status, the allowable charging time in the application scenario with the manually set value. The value of the charging base current is generally between 0.1C and 0.3C of the battery capacity;

[0041] Step 2: First, charge the battery to the first-stage constant voltage control point of the lead-carbon battery system under the initial base current control according to the charge and discharge method of the battery;

[0042] Step 3: When the battery is charged at a constant current with the base current until it reaches the first-stage constant voltage control point of the single-cell aluminum-based lead-carbon battery system, at the first-stage constant voltage control point, start gradually reducing the charging current of the battery according to the battery's electron absorption ability until the full-charge cut-off current of the battery is reached;

[0043] Step 4: After the battery system reaches the full-charge cut-off current of the battery during the discharging-type charging at the first-stage constant voltage point, the system adjusts the charging voltage of the battery to the second-stage constant voltage control point.

[0044] Step 5: The system stops when the battery is charged to the second-stage constant voltage control point with the full-charge cut-off current.

[0045] As Figure 3As shown, in Step1, the charging base current is 300A. In Step2, when charging with the previous current and the battery voltage reaches 789.6, the charging current decreases to another value.

[0046] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0047] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method of the present invention and its core idea. At the same time, for those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A high-safety aluminum-based lead-carbon battery charging control method, characterized in that: include: S1: Determine the target battery charging base current according to the target battery system capacity status, the charging time allowed by the application scenario and the manually set value. The charging base current value is between 0.1C and 0.3C of the battery capacity; S2: charging the battery to the first level constant voltage control point of the lead-carbon battery system under the initial base current control; S3: After the battery is charged with a base current to the first-level constant voltage control point of the single-aluminum-based lead-carbon battery system, the charging current of the battery is gradually reduced according to the battery's ability to absorb electrons until the battery is fully charged and the cut-off current is reached; S4: After the battery system reaches the full-charge cut-off current of the battery through unloading charging at the first-level constant voltage point, the system adjusts the charging voltage of the battery to the second-level constant voltage control point; S5: The system stops charging the battery to the second-level constant voltage control point at the full-charge cut-off current.

2. The high-safety aluminum-based lead-carbon battery charging control method according to claim 1 is characterized in that: include: The average constant voltage control point of the first-stage monomer is 2.30V~2.34V; The base value of charging current for the first-level battery system is 0.1C to 0.3C; The average voltage control point of the second-stage monomer is 2.35V~2.40V; The second level full charge cut-off current value is 0.015C of the battery capacity.

3. A high-safety aluminum-based lead-carbon battery charging control system, characterized in that: include: The first-stage current-discharging constant-voltage charging module is used to charge the battery to the first-stage battery constant voltage with a base current, and then start to discharge the current according to the battery's ability to absorb electrons, so as to reduce the damage to the battery caused by saturated excess electrons; The second-stage cut-off current constant current charging module is used to charge the battery with a full-charge cut-off current until the second-stage constant voltage stops, so as to reduce the damage to the battery caused by overvoltage and saturated electrons.

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