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

Abstract

The application provides a high-safety aluminum-based lead-carbon battery charging control method and system, and belongs to the technical field of energy storage and battery charging. The high-safety aluminum-based lead-carbon battery charging control method and system can reduce the effect time of overcurrent and overvoltage on the target battery according to the 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 attenuation of the battery, and finally achieving the purpose of prolonging the service life of the battery. Meanwhile, the energy conversion and utilization efficiency of the aluminum-based lead-carbon battery is improved.

Description

Technical Field

[0001] This invention relates to the field of energy storage and battery charging technology, and in particular to a high-safety aluminum-based lead-carbon battery charging control method and system. Background Technology

[0002] In recent years, the global green energy sector has seen strong growth in response to climate change. Installed capacity of renewable energy sources such as solar and wind power has continued to increase, costs have been declining, and market competitiveness has been strengthening. However, the instability and discontinuity of green energy sources like solar and wind power remain, thus creating new opportunities for the development of batteries such as lithium iron phosphate, lead-carbon, and zinc-nickel batteries in the energy storage field.

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

[0004] Therefore, this invention provides a two-stage voltage-dividing and current-offloading charging control method and system to reduce the problem of rapid capacity decay of lead-carbon batteries caused by over-electrons and high voltage in traditional charging methods, thereby improving the service life of lead-carbon batteries.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this 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.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] A high-safety aluminum-based lead-carbon battery charging control method includes:

[0009] S1: Determine the target battery charging base current by comparing the target battery system capacity status, the allowable charging time for the application scenario, and the manually set value. The charging base current value is between 0.1C and 0.3C of the battery capacity.

[0010] S2: The battery is charged to the first-stage constant voltage control point of the aluminum-based lead-carbon battery system under the control of the charging base current.

[0011] S3: After the battery is charged to the first-stage constant voltage control point of the single aluminum-based lead-carbon battery system with the charging base current, 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 current is cut off.

[0012] S4: After the battery system reaches the full charge cutoff current of the battery through the current-discharging charging at the first-stage constant voltage control point, the system adjusts the battery charging voltage to the second-stage constant voltage control point.

[0013] S5: The system stops charging the battery to the second-stage constant voltage control point using the full-charge cutoff current.

[0014] Optionally, the first-stage constant voltage control point is 2.30V to 2.34V;

[0015] The base charging current for the first-stage battery system is 0.1C to 0.3C of the battery capacity.

[0016] The second-stage constant voltage control point is 2.35V to 2.40V;

[0017] The full-charge cutoff current is 0.015C of the battery capacity.

[0018] A high-safety aluminum-based lead-carbon battery charging control system, used to implement the above-described charging control method, comprising:

[0019] The first-stage current-reducing constant-voltage charging module is used to charge the battery to the first-stage constant-voltage control point with the charging base current, and then start to reduce 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.

[0020] The second-stage cutoff current constant current charging module is used to charge the battery with the full-charge cutoff current until the second-stage constant voltage control point stops, so as 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 this invention can reduce the duration of overcurrent and overvoltage on the target battery based on the aluminum-based lead-carbon battery's electron absorption capacity and voltage tolerance during charging, thereby reducing damage to the battery, delaying battery degradation, and ultimately improving the battery's lifespan. It also improves the energy conversion efficiency of the aluminum-based lead-carbon battery. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram illustrating the control flow of the charging method provided in an embodiment of the present invention.

[0025] Figure 2 This is a charging flowchart for embodiment 1 of the charging control in a photovoltaic energy storage environment provided by the present invention.

[0026] Figure 3 The control flowchart provided in Embodiment 2 of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The purpose of this 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-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1:

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

[0032] Step 1: Determine the target battery charging base current by comparing the target battery system capacity status, the allowable charging time for the application scenario, and the manually set value. The charging base current value is generally between 0.1C and 0.3C of the battery capacity.

[0033] Step 2: According to the battery charging and discharging method, first charge the battery to the first-stage constant voltage control point of the aluminum-based lead-carbon battery system under the control of the charging base current;

[0034] Step 3: After the battery is charged at the base current to the first 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 current is cut off.

[0035] Step 4: After the battery system reaches the full charge cutoff current at the first-stage constant voltage control point through current discharge charging, the system adjusts the battery charging voltage to the second-stage constant voltage control point.

[0036] Step 5: The system charges the battery to the second-stage constant voltage control point using the full-charge cutoff current and then stops.

[0037] like Figure 2 As shown, Step 1 is the photovoltaic converter charging stage under the base value constant current control; Step 2 is the first-level constant voltage control point, with the average single cell voltage of the system being 2.32V; Step 3 is the active current reduction stage; Step 4 is the second-level constant current control point, with the average single cell voltage of the system being 2.35V; Step 5 is the cutoff current constant current charging stage.

[0038] Example 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 based on the target battery system capacity status, the allowable charging time for the application scenario, and the manually set value. The charging base current value is generally between 0.1C and 0.3C of the battery capacity.

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

[0042] Step 3: After the battery is charged at the base current to the first 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 current is cut off.

[0043] Step 4: After the battery system reaches the full charge cutoff current at the first-stage constant voltage control point through current discharge charging, the system adjusts the battery charging voltage to the second-stage constant voltage control point.

[0044] Step 5: The system charges the battery to the second-stage constant voltage control point using the full-charge cutoff current and then stops.

[0045] like Figure 3As shown, in Step 1, the base charging current is 300A. In Step 2, when the battery voltage reaches 789.6, the charging current is reduced to another value.

[0046] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0047] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A high safety aluminum-based lead-carbon battery charge control method, characterized by, Comprising: S1: Determine the target battery charging base current according to the target battery system capacity state, compare the application scenario allowed charging time with the artificial setting value, and the charging base current value is between 0.1C and 0.3C of the battery capacity; S2: The battery is charged to the first constant voltage control point of the aluminum-based lead-carbon battery system under the control of the charging base current; S3: After the battery is charged to the first constant voltage control point of the single aluminum-based lead-carbon battery system with the charging base current, start to gradually unload the battery charging current according to the battery's ability to absorb electrons until the battery full cut-off current under the first constant voltage control point; S4: After the battery system is charged to the full cut-off current of the battery at the first constant voltage control point, the charging voltage of the battery is adjusted to the second constant voltage control point; S5: Stop charging the battery to the second constant voltage control point with the full cut-off current; The first constant voltage control point is 2.30V-2.34V; The first battery system charging base current is 0.1C-0.3C of the battery capacity; The second constant voltage control point is 2.35V-2.40V; The full cut-off current value is 0.015C of the battery capacity.

2. A high safety aluminum-based lead-carbon battery charge control system for implementing the charge control method of claim 1, characterized by, Comprising: The first constant voltage charging module is used to charge the battery to the first constant voltage control point with the charging base current, and then start to unload the current according to the battery's ability to absorb electrons to reduce the damage of saturated excess electrons to the battery; The second constant current charging module with cut-off current is used to charge the battery to the second constant voltage control point with the full cut-off current of the battery to stop, so as to reduce the damage of overvoltage and saturated electrons to the battery.

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