A battery charging control method

Abstract

The present invention discloses a battery charging control method, in which a single chip microcomputer as a controller is used to control the battery charging. After the battery charging reaches a preset cycle time, the charging circuit is disconnected to allow the battery voltage to return to the actual voltage. After the battery voltage drops and stabilizes, the voltage is detected again, thereby avoiding detection interference caused by the charging voltage. Compared with the existing method for charging the battery by a charging device, the charging effect of the scheme is better, and the battery overcharge phenomenon will not occur. When the battery is fully charged, the battery voltage is closer to the full-charge voltage of the rechargeable battery, that is, the rated voltage, thereby improving the battery performance and increasing the battery life. Moreover, the scheme selects a single chip microcomputer as a controller to control charging, thereby reducing the cost.

Description

Technical Field

[0001] The present invention relates to the field of battery charging management, and in particular to a battery charging control method. Background Art

[0002] As an important energy supply device, batteries have the characteristics of stable voltage, stable current, and long-term stable power supply. In addition, some batteries have simple structures, are easy to carry, and are easy to charge and discharge. They are not affected by external climate and temperature, and have stable and reliable performance. They play a big role in all aspects of modern social life.

[0003] In the existing battery charging scheme, the charging voltage is continuously injected into the battery when the battery is charging, and when the battery is fully charged, the battery will continue to be charged at the voltage when it is not fully charged. This charging method will cause great damage to the battery, shorten the battery life, and greatly reduce the battery performance; in addition, most existing charging devices use charging chips to charge the battery, which increases the cost.

[0004] Based on this, the present invention designs a battery charging control method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a battery charging control method to solve the problem in the above-mentioned background technology that when the battery is fully charged, the charging device will continue to charge the battery at a voltage when the battery is not fully charged, resulting in a shortened battery life, reduced performance, and increased costs of the charging device using a charging chip.

[0006] To achieve the above object, the present invention provides the following technical solution: a battery charging control method, comprising the following steps:

[0007] The battery historical data statistics chip generates a charging period table based on the battery's historical charging data;

[0008] If the current time is within the charging period table, detecting whether the battery is in a charging state;

[0009] If the battery is in a charging state, the temperature control chip determines whether the temperature of the battery is within a set battery charging temperature range;

[0010] If the temperature of the battery is not within the set battery charging temperature range, the temperature control chip sends a temperature adjustment instruction to the temperature regulator, and the temperature regulator cools or heats the battery;

[0011] If the temperature of the battery is within the set battery charging temperature range, the controller determines whether the charging voltage and current are within the set battery charging voltage value range and the set battery charging current value range. If so, the continuous charging state is maintained, and the detection module detects the current voltage of the battery during the charging process. Otherwise, a control signal is sent to control the switch circuit to disconnect the charging circuit.

[0012] The controller controls the constant current charging circuit to perform a constant current charging cycle on the battery;

[0013] When a predetermined charging circuit switching voltage threshold is obtained on the battery, the controller issues a circuit switching instruction to switch to a constant voltage charging circuit for charging until a predetermined minimum charging rate is reached;

[0014] The battery historical data statistics chip obtains, based on the historical charging data of the battery, that the charging cycle time is T seconds, the time required for the voltage in the battery to fall back after charging is completed is M seconds, and the time required for the voltage detection is N seconds, where T, M and N are all positive numbers;

[0015] After charging is completed, the controller controls the charging circuit to disconnect and delays for M seconds, so that the voltage in the battery drops, and then the control module continues to detect the battery voltage for N seconds;

[0016] The detection module detects whether the battery voltage reaches the rated voltage of the battery at full charge. If not,

[0017] Then continue charging.

[0018] Furthermore, the controller includes a first control terminal, which is connected to the switch circuit; the controller outputs the control signal through the first control terminal to connect the switch circuit, so that the switch circuit is connected or disconnected.

[0019] Further, the controller further includes a second control terminal, which is connected to the switch circuit and configured to receive a sensing signal input by the switch circuit;

[0020] In response to the second control end obtaining the sensing signal, the controller continuously outputs the control signal via the first control end to control the battery and the controller to maintain a connection state.

[0021] Furthermore, the switch circuit is connected to the constant current charging circuit and the constant voltage charging circuit respectively.

[0022] Furthermore, the battery charging voltage value is set in the range of 0.5V to 5.0V.

[0023] Furthermore, the set battery charging current value ranges from 0.5A to 3.0A.

[0024] Furthermore, the set battery charging temperature range is -10°C to 60°C.

[0025] Furthermore, there are multiple batteries.

[0026] Furthermore, the controller is a single chip microcomputer.

[0027] Beneficial Effects

[0028] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0029] When the present invention charges the battery through the control of the single-chip microcomputer as a controller, after the battery charging reaches a preset cycle time, the charging circuit is disconnected to allow the battery voltage to return to the actual voltage. After the battery voltage drops and stabilizes, the voltage is detected again, thereby avoiding detection interference caused by the charging voltage. Compared with the existing method of charging the battery with a charging device, the charging effect of the present scheme is better, and the battery will not be overcharged. When the battery is fully charged, the battery voltage is closer to the full-charge voltage of the rechargeable battery, that is, the rated voltage, thereby improving the battery performance and increasing the battery life. Moreover, the present scheme selects a single-chip microcomputer as a controller to control charging, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0031] Figure 1 A schematic flow chart of a battery charging control method according to an embodiment of the present invention;

[0032] Figure 2 The structure block diagram of a single chip microcomputer used as a controller in one embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention will be further described below in conjunction with the embodiments.

[0035] A battery charging control method of this embodiment includes the following steps:

[0036] S100, the battery historical data statistics chip generates a charging period table according to the historical charging data of the battery;

[0037] In an embodiment of the present invention, a battery charging device or a battery is provided with a battery historical data statistics chip, which can obtain the battery historical charging data and, based on the battery historical charging data, generate statistical historical charging information, such as a charging period table, a charging cycle time, the time required for the voltage in the battery to drop after charging is completed, the time required for detecting the voltage, etc.

[0038] S102, if the current time is within the charging time table, detecting whether the battery is in a charging state;

[0039] In an embodiment of the present invention, a controller configured in a battery or a charging device can determine whether the current moment is within the charging period table. If the current moment is within the charging period table, it detects whether the battery is in a charging state, which makes the detection scheme smarter and more in line with actual usage.

[0040] In the embodiment of the present invention, the controller is a single chip microcomputer. Figure 2 This is a block diagram of a single-chip microcomputer structure.

[0041] A single-chip microcomputer is an integrated circuit chip that uses very large-scale integrated circuit technology to integrate a central processing unit CPU with data processing capabilities, random access memory RAM, read-only memory ROM, multiple I / O ports and interrupt system, timer / counter and other functions into a small and complete microcomputer system on a silicon chip. It is widely used in the field of industrial control.

[0042] S104, if the battery is in a charging state, the temperature control chip determines whether the temperature of the battery is within a set battery charging temperature range;

[0043] On the one hand, during the battery charging process, the battery temperature will rise in a short period of time, which may damage the rated capacity of the battery itself, thereby shortening the battery life. On the other hand, in extreme weather conditions, if the temperature is low, it will also affect the charging efficiency and charging safety of the battery.

[0044] In the embodiment of the present invention, a configured temperature control chip determines whether the temperature of the battery is within a set battery charging temperature range, so as to monitor the temperature change during the charging process in real time to ensure safety.

[0045] S106, if the temperature of the battery is not within the set battery charging temperature range, the temperature control chip sends a temperature adjustment instruction to the temperature regulator, and the temperature regulator cools or heats the battery;

[0046] In an embodiment of the present invention, when the temperature of the battery is not within the set battery charging temperature range, that is, the temperature is too high or too low, the temperature control chip sends a temperature adjustment instruction to the temperature regulator, and the temperature regulator cools or heats the battery to reach a temperature that can ensure safe charging.

[0047] In one embodiment of the present invention, the set battery charging temperature range is -10°C to 60°C.

[0048] S108, if the temperature of the battery is within the set battery charging temperature range, the controller determines whether the charging voltage and current are within the set battery charging voltage value range and the set battery charging current value range, if so, the continuous charging state is maintained, and the detection module detects the current voltage of the battery during the charging process, otherwise a control signal is sent to control the switch circuit to disconnect the charging circuit;

[0049] In an embodiment of the present invention, if the temperature of the battery is within the set battery charging temperature range, the single-chip microcomputer serving as a controller determines whether the charging voltage is within the set battery charging voltage value range, and whether the charging current is within the set battery charging current value range. If so, the charging state is maintained continuously, and the detection module detects the current voltage of the battery during the charging process; if the charging voltage is not within the set battery charging voltage value range or the charging current is not within the set battery charging current value range, the controller sends a control signal to control the switch circuit to disconnect the charging circuit to ensure safety.

[0050] In one embodiment of the present invention, the set battery charging voltage value range is 0.5V to 5.0V; the set battery charging current value range is 0.5A to 3.0A.

[0051] S110, the controller controls the constant current charging circuit to perform a constant current charging cycle on the battery;

[0052] In the embodiment of the present invention, when the charging temperature, charging voltage and charging current are all within the range that can ensure safe charging, the controller controls the constant current charging circuit provided in the charging device to perform a constant current charging cycle on the battery.

[0053] S112, when a predetermined charging circuit switching voltage threshold is obtained on the battery, the controller issues a circuit switching instruction to switch to a constant voltage charging circuit for charging until a predetermined minimum charging rate is reached;

[0054] In an embodiment of the present invention, during the process in which the controller controls the constant current charging circuit to perform a constant current charging cycle on the battery, when a predetermined charging circuit switching voltage threshold is obtained on the battery, the controller issues a circuit switching instruction to switch to the constant voltage charging circuit for charging until a predetermined minimum charging rate is reached to further ensure charging safety.

[0055] S114, the battery historical data statistics chip obtains, based on the historical charging data of the battery, that the charging cycle time is T seconds, the time required for the voltage in the battery to fall back after charging is completed is M seconds, and the time required for voltage detection is N seconds, wherein T, M and N are all positive numbers;

[0056] In an embodiment of the present invention, a battery charging device or a battery is provided with a battery historical data statistics chip, which can obtain the battery historical charging data and, based on the battery historical charging data, generate statistical historical charging information, such as a charging period table, a charging cycle time T, a time M required for the voltage in the battery to fall back after charging is completed, a time N required for detecting the voltage, etc., wherein T, M and N are all positive numbers.

[0057] S116, after charging is completed, the controller controls the charging circuit to be disconnected and delays for M seconds, so that the voltage in the battery drops, and then the control module continues to detect the battery voltage for N seconds;

[0058] In an embodiment of the present invention, the battery is periodically charged by a single chip microcomputer as a controller, and the controller periodically detects the voltage; when the charging voltage is injected into the battery, the voltage inside the battery rises, and the controller controls the battery to be charged. For example, when charging for 15 seconds, the charging switch is disconnected and delayed for 0.005 seconds. After the voltage inside the battery drops, it is detected by the controller again, and the time for detecting the voltage inside the battery is 0.5 seconds.

[0059] Through periodic charging, the battery voltage can be tested every time the switch is disconnected. The high frequency of inspection can avoid overcharging of the battery. There will be a delay of 0.005 seconds after the charging switch is disconnected, leaving buffer time for the battery voltage to fall back, so that the voltage is detected during the period of stable battery voltage, and the test result will be more accurate.

[0060] S118, the detection module detects whether the voltage of the battery reaches the rated voltage of the battery at full charge,

[0061] If not, continue charging.

[0062] In an embodiment of the present invention, the detection module further detects whether the voltage of the battery reaches the rated voltage of the battery at full charge. If it reaches, charging is stopped; if it does not reach, charging continues. In another embodiment of the present invention, the controller includes a first control terminal, the first control terminal is connected to the switch circuit; the controller outputs the control signal through the first control terminal to connect the switch circuit, so that the switch circuit is connected or disconnected.

[0063] In another embodiment of the present invention, the controller also includes a second control terminal, which is connected to the switching circuit and is configured to receive a sensing signal input by the switching circuit; and in response to the second control terminal obtaining the sensing signal, the controller continuously outputs the control signal via the first control terminal to control the battery and the controller to maintain a connection state.

[0064] In another embodiment of the present invention, two charging circuits are configured, namely a constant current charging circuit and a constant voltage charging circuit, and the switch circuit is connected to the constant current charging circuit and the constant voltage charging circuit respectively.

[0065] In another embodiment of the present invention, the battery is multiple, that is, a battery pack, and the controller is further used to adjust and balance the charging time, charging voltage, and charging current of each battery according to the charging status of each battery.

[0066] In the scheme of the present invention, when the battery is charged by the single-chip microcomputer as a controller, after the battery charging reaches a preset cycle time, the charging circuit is disconnected to allow the battery voltage to return to the actual voltage. After the battery voltage drops and stabilizes, the voltage is detected again, thereby avoiding detection interference caused by the charging voltage. Compared with the existing method of charging the battery with a charging device, the charging effect of the present scheme is better, and the battery will not be overcharged. When the battery is fully charged, the battery voltage is closer to the full-charge voltage of the rechargeable battery, that is, the rated voltage, thereby improving the battery performance and increasing the battery life. Moreover, the present scheme selects a single-chip microcomputer as a controller to control charging, thereby reducing costs.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A battery charging control method, characterized in that: The following steps are involved: The battery historical data statistics chip generates a charging period table based on the battery's historical charging data; If the current time is within the charging period table, detecting whether the battery is in a charging state; If the battery is in a charging state, the temperature control chip determines whether the temperature of the battery is within a set battery charging temperature range; If the temperature of the battery is not within the set battery charging temperature range, the temperature control chip sends a temperature adjustment instruction to the temperature regulator, and the temperature regulator cools or heats the battery; If the temperature of the battery is within the set battery charging temperature range, the controller determines whether the charging voltage and current are within the set battery charging voltage value range and the set battery charging current value range. If so, the charging state is maintained continuously, and the detection module detects the current voltage of the battery during the charging process. Otherwise, a control signal is sent to control the switch circuit to disconnect the charging circuit. The controller controls the constant current charging circuit to perform a constant current charging cycle on the battery; When a predetermined charging circuit switching voltage threshold is obtained on the battery, the controller issues a circuit switching instruction to switch to a constant voltage charging circuit for charging until a predetermined minimum charging rate is reached; The battery historical data statistics chip obtains, based on the historical charging data of the battery, that the charging cycle time is T seconds, the time required for the voltage in the battery to fall back after charging is completed is M seconds, and the time required for the voltage detection is N seconds, where T, M and N are all positive numbers; After charging is completed, the controller controls the charging circuit to disconnect and delays for M seconds, so that the voltage in the battery drops, and then the control module continues to detect the battery voltage for N seconds; The detection module detects whether the voltage of the battery reaches the rated voltage of the battery at full charge, and if not, continues charging.

2. The battery charging control method according to claim 1, characterized in that: The controller includes a first control terminal connected to the switch circuit; the controller outputs the control signal through the first control terminal to connect the switch circuit, so that the switch circuit is connected or disconnected.

3. The battery charging control method according to claim 1, characterized in that: The controller further includes a second control terminal connected to the switch circuit and configured to receive a sensing signal input by the switch circuit; In response to the second control end obtaining the sensing signal, the controller continuously outputs the control signal via the first control end to control the battery and the controller to maintain a connection state.

4. The battery charging control method according to claim 1, characterized in that: The switch circuit is connected to the constant current charging circuit and the constant voltage charging circuit respectively.

5. The battery charging control method according to claim 1, characterized in that: The battery charging voltage is set to range from 0.5V to 5.0V.

6. The battery charging control method according to claim 1, characterized in that: The set battery charging current value ranges from 0.5A to 3.0A.

7. The battery charging control method according to claim 1, characterized in that: The set battery charging temperature range is -10°C to 60°C.

8. The battery charging control method according to claim 1, characterized in that: The number of the batteries is multiple.

9. The battery charging control method according to claim 1, characterized in that: The controller is a single chip microcomputer.

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