Lead-acid battery charging management module

Abstract

The utility model discloses a lead-acid battery charging management module, which comprises a shell, and a charging unit and a charging management unit are arranged in the shell. The charging unit comprises an AC / DC power conversion unit for converting AC 220V into DC 28.8 V; an acquisition unit of the following parameters is connected between the charging management unit and the charging unit: charging voltage, charging current, battery voltage and alternating current input parameters, and the charging management unit is connected with an external control unit through a CAN (Controller Area Network) bus. The charging management unit is provided with an over-temperature protection unit, an input over-voltage protection unit and an over-voltage and over-current protection unit output by each branch, and is connected with an alarm indicating lamp. Modularized design is adopted, charging of battery packs with different capacities can be expanded, the application range is wide, reliability is high, the function of sampling voltage, charging voltage, charging current and the like of the battery packs is achieved at the same time, structural design is simple, assembling is convenient, and the device is applied to various comprehensive power supplies and chargers.

Description

Technical Field

[0001] The utility model relates to a vehicle-mounted battery charging maintenance technology, in particular to a lead-acid battery charging management module. Background Art

[0002] The on-board charging management mainly consists of a charging unit, a battery pack and a charging management unit. To realize the charging and maintenance of the battery pack of the whole vehicle, since lead-acid batteries are consumables by nature, how to maintain and use lead-acid batteries well and reduce resource loss is a hot issue in the current research field.

[0003] In the prior art, due to the lack of certain management strategies, the battery charging is poor, which reduces the service life and performance of the battery.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a lead-acid battery charging management module to solve the above technical problems existing in the prior art.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] The lead-acid battery charging management module of the utility model comprises a shell, in which a charging unit and a charging management unit are arranged;

[0008] The charging unit includes an AC / DC power conversion unit that converts AC220V into DC28.8V;

[0009] A collection unit for the following parameters is connected between the charging management unit and the charging unit: charging voltage, charging current, battery voltage, AC input parameters, and is connected to an external control unit via a CAN bus.

[0010] Compared with the prior art, the lead-acid battery charging management module provided by the utility model can correctly charge and maintain the lead-acid battery, extend its service life, improve the performance of the battery, and ensure safe use. The charging management strategy module integrates the charging management unit and the charging unit. The charging unit provides charging power, and the charging management unit performs charging maintenance control strategy, which effectively solves the impact of poor battery charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of a lead-acid battery charging management module provided in an embodiment of the utility model.

[0012] Figure 2 It is a diagram of charging voltage for lead-acid battery charging management module;

[0013] Figure 3 This is a diagram of the charging current of the lead-acid battery charging management module. DETAILED DESCRIPTION

[0014] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments, which does not constitute a limitation of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0015] First, the terms that may be used in this article are explained as follows:

[0016] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0017] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0018] The contents not described in detail in the examples of the present utility model belong to the prior art known to professional and technical personnel in the field. If no specific conditions are specified in the examples of the present utility model, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers of the reagents or instruments used in the examples of the present utility model are not specified, they are all conventional products that can be purchased commercially.

[0019] The lead-acid battery charging management module of the utility model comprises a shell, in which a charging unit and a charging management unit are arranged;

[0020] The charging unit includes an AC / DC power conversion unit that converts AC220V into DC28.8V;

[0021] A collection unit for the following parameters is connected between the charging management unit and the charging unit: charging voltage, charging current, battery voltage, AC input parameters, and is connected to an external control unit via a CAN bus.

[0022] The charging management unit is provided with over-temperature, input over-voltage, and over-voltage and over-current protection units for each branch output, and is connected with an alarm indicator light.

[0023] The shell is made of PC+ABS and is injection molded. The side of the shell is provided with input and output columns, and the top surface of the shell is provided with a communication interface.

[0024] In summary, the lead-acid battery charging management module of the embodiment of the utility model is used for charging lead-acid batteries. It adopts a modular design and can be expanded to charge battery packs of different capacities. It has a wide range of applications and high reliability. It can simultaneously perform sampling functions such as the voltage, charging voltage and charging current of the battery pack. It has a simple structural design and is easy to assemble. It is used in various integrated power supplies and chargers.

[0025] The structure is simple, the assembly is convenient, the practicability is strong, and the appearance is elegant.

[0026] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the embodiments of the present invention are described in detail with specific embodiments below.

[0027] Example 1

[0028] like Figures 1 to 3 As shown:

[0029] The lead-acid battery charging management module is divided into three parts: a charging unit (1), a charging management unit (1), and a housing (1).

[0030] 1. Charging management unit:

[0031] The charging management unit uses the domestically produced GD32F105 series microcontroller as the main control chip. The charging unit's AC input voltage, current and frequency are collected through the fuel gauge unit, the charging current and voltage are collected through the Hall sensor, and the output voltage of the charging unit is controlled through the DA control of the Trim pin voltage of the charging unit. The collected voltage, current, frequency and temperature data are reported through the CAN bus, and external control instructions are accepted at the same time; the over-temperature, input over-voltage and over-voltage and over-current protection functions of each branch output are realized according to the set threshold judgment, and the alarm indicator light prompts are output.

[0032] 2. Charging unit:

[0033] The input voltage of the charging unit is 85Vac~290Vac, and it has dual auxiliary power supply, logic remote control, constant current charging, N+1 module parallel current equalization and voltage regulation function, and output current detection function. The power board input circuit has two-stage common mode filtering, which has good EMC characteristics; the output is Π-type filtering, which effectively suppresses output ripple and noise.

[0034] 3. Shell

[0035] The shell is made of PC+ABS and is injection molded. Input and output columns are provided on the side of the shell, and a communication interface is installed on the top of the shell.

[0036] The PC+ABS has good heat insulation, flame retardancy and temperature resistance properties.

[0037] The charging unit can realize the AC / DC power conversion function, can realize the charging function of converting AC220V to DC28.8V, and has the function of changing the output voltage by adjusting Trim. The charging management unit can respond to the charging management strategy by collecting the charging voltage, charging current, battery voltage, and AC input status.

[0038] The charging management strategy can be divided into four parts: trickle charging, constant current charging, constant voltage charging and charge termination.

[0039] First, detect the voltage of the battery to be charged. When the battery voltage is low, pre-charge is performed first, and the charging current is 1 / 10 of the set maximum charging current. When the battery voltage rises to a certain value, the standard charging process is entered. The standard charging process is: constant current charging with the maximum charging current, the battery voltage continues to rise steadily, when the battery voltage rises to close to the set maximum voltage, it is changed to constant voltage charging, at this time, the charging current gradually decreases, when the current drops to 1 / 10 of the maximum charging current, it enters the floating charge and the charging ends.

[0040] Stage 1: Trickle charge - Trickle charge is used to pre-charge (recovery charge) the fully discharged battery cells. Trickle charge is used when the battery voltage is lower than about 10V. The trickle charge current is one tenth of the constant current charge current, i.e. 0.1C (taking the constant charge current as 1A as an example, the trickle charge current is 100mA).

[0041] Phase 2: Constant current charging - When the battery voltage rises above the trickle charge threshold, the charging current is increased for constant current charging. The current of constant current charging is between 0.2C and 1.0C. The battery voltage gradually increases with the constant current charging process. Generally, the voltage set for the battery is 28.8V.

[0042] Stage 3: Constant voltage charging - When the battery voltage rises to 28.8V, constant current charging ends and constant voltage charging begins. The current is based on the saturation of the battery cell. As the charging process continues, the charging current slowly decreases from the maximum value. When it decreases to 0.01C, the charging is considered complete. (C is a method of expressing the nominal capacity of the battery against the current. For example, if the battery has a capacity of 1000mAh, 1C is a charging current of 1000mA.)

[0043] Stage 4: Charging ends after floating charge - There are two typical charging termination methods: using the minimum charging current judgment or using a timer (or a combination of the two). The minimum current method monitors the charging current during the constant voltage charging stage, and enters the floating charge when the charging current decreases to the range of 0.02C to 0.07C, and terminates the charging after floating charge for 30 minutes. The second method starts from the beginning of the constant voltage charging stage and terminates the charging process after two hours of continuous charging.

[0044] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the utility model, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A lead-acid battery charging management module, characterized in that: It comprises a housing, in which a charging unit and a charging management unit are arranged; The charging unit includes an AC / DC power conversion unit that converts AC220V into DC28.8V; A collection unit for the following parameters is connected between the charging management unit and the charging unit: charging voltage, charging current, battery voltage, AC input parameters, and is connected to an external control unit via a CAN bus.

2. The lead-acid battery charging management module according to claim 1, characterized in that: The charging management unit is provided with over-temperature, input over-voltage, and over-voltage and over-current protection units for each branch output, and is connected with an alarm indicator light.

3. The lead-acid battery charging management module according to claim 2, characterized in that: The shell is made of PC+ABS and is injection molded. The side of the shell is provided with input and output columns, and the top surface of the shell is provided with a communication interface.

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