An intelligent charging method and device

Abstract

The embodiment of the present application provides a kind of intelligent charging method and intelligent charging device, the intelligent charging method comprises: obtaining the maximum power supply current of power supply system, detects the current charging current of battery;According to the current charging current of the battery and the maximum charging current available to the battery, the current charging current of the battery is adjusted, and the maximum charging current available to the battery is the maximum power supply current of power supply system.The present application also discloses an intelligent charging device to implement the above scheme, in some implementation process, the problem that power supply system provides insufficient energy to battery in the case of insufficient energy of power supply system, leads to the problem of pulling down power supply system or intelligent charging device stopping charging.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to, but are not limited to, the field of terminal charging, in particular, to, but are not limited to, a smart charging method and device. BACKGROUND

[0002] In the case of insufficient energy of a power supply system, a lead-acid battery without a battery management system at most pulls down the voltage of the power supply system to be consistent with the voltage of the lead-acid battery, and a lithium battery with a battery management system will absorb the energy of the power supply system according to the set charging current under the action of the intelligent charging device of the battery management system until the power supply system is under-voltage or the battery management system judges to stop charging. Thus, part of the energy that can be used to charge the battery is wasted because it is less than the maximum charging energy set by the battery management system. Therefore, in order to avoid energy waste, the part of energy less than the maximum charging setting value of the battery management system needs to be utilized.

[0003] The following technology is applied to the battery management system of a communication power supply: without considering the case of insufficient energy of the power supply system, the intelligent charging device of the battery management system sets the charging voltage / current, and the energy is converted from the power supply system to the battery end according to the set value, so that the battery is charged according to the set condition. However, due to the fact that the power supply system often has module damage, or the load fluctuation of the power supply system, or the case that the lead-acid battery is mixed with the lithium battery and the lead-acid battery occupies too much energy, the energy of the power supply system is insufficient. In order to meet the maximum load of the system and ensure a certain margin, the installed capacity of the power supply system should be increased. Therefore, how to make the intelligent charging device automatically adapt to the power supply capacity of the external power supply, and how to prevent the power supply system from providing insufficient energy to the battery, which leads to the collapse of the power supply system or the intelligent charging device stopping charging, become problems to be solved urgently. SUMMARY

[0004] The embodiments of the present application provide a smart charging method and device, which mainly solve the technical problem of how to make the intelligent charging device automatically adapt to the power supply capacity of the external power supply.

[0005] To solve the above technical problems, the embodiments of the present application provide a smart charging method, which comprises:

[0006] obtaining the maximum power supply current of the power supply system;

[0007] detecting the current charging current of the battery;

[0008] adjusting the current charging current of the battery according to the current charging current of the battery and the maximum charging current available for the battery, wherein the maximum charging current available for the battery is the maximum power supply current of the power supply system.

[0009] Further, the application also provides a smart charging device, characterized in that comprising:

[0010] an acquisition module, configured to acquire a maximum power supply current of a power supply system;

[0011] a detection module, configured to detect a current charging current of a battery;

[0012] an adjustment module, configured to adjust the current charging current of the battery according to the current charging current of the battery and a maximum charging current available for the battery, the maximum charging current available for the battery being the maximum power supply current of the power supply system.

[0013] The application has the following beneficial effects:

[0014] According to the embodiments of the application, a smart charging method and a smart charging device are provided, by acquiring a maximum power supply current of a power supply system, detecting a current charging current of a battery, and adjusting the current charging current of the battery according to the current charging current of the battery and a maximum charging current available for the battery, the maximum charging current available for the battery being the maximum power supply current of the power supply system, the problem that the power supply system provides insufficient energy to the battery in the case of insufficient energy of the power supply system, leading to collapse of the power supply system or stop of the smart charging device, is solved in certain implementation processes.

[0015] Other features and corresponding beneficial effects of the application are described in the latter part of the specification, and it should be understood that at least part of the beneficial effects are apparent from the description of the application in the specification. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 a basic flowchart of a smart charging method provided for the first embodiment of the application;

[0017] Figure 2 a structural schematic diagram of a smart charging device provided for the second embodiment of the application. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the application clearer, further detailed description of the embodiments of the application is made below in combination with the drawings. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0019] Embodiment one:

[0020] In order to solve the problem that the power supply system provides insufficient energy to the battery in the case of insufficient energy of the power supply system, leading to collapse of the power supply system or stop of the smart charging device, the first embodiment of the application provides a smart charging method. Figure 1A basic flowchart of an intelligent charging method provided for embodiment one of the present application, the method comprises:

[0021] S101: Obtain the maximum power supply current of the power supply system.

[0022] It should be understood that, without considering the power supply system energy shortage, the intelligent charging device of the battery management system is set to charge the battery with the set value of energy from the power supply system to the battery end, so that the battery is charged according to the set condition. However, due to the frequent damage of the power supply system module, or the load fluctuation of the power supply system, or the excessive energy of the lead-acid battery mixed with the lithium battery, the power supply system energy is insufficient.

[0023] In the case of sufficient energy of the power supply system, the maximum charging current available to the battery is usually stable, but the external charging system may also have energy shortage, resulting in the change of the maximum charging current available to the battery. The lithium battery with battery management system will absorb the energy of the power supply system according to the set charging current under the action of the intelligent charging device of the battery management system, until the external undervoltage or the battery management system judges to stop charging. Specifically, when the current charging current of the battery is greater than the maximum charging current available to the battery, the current of the battery is too large relative to the power supply capacity of the power supply system, according to the formula: U = I * R, due to the large current, the voltage drop of the battery will increase, resulting in the increase of the internal resistance voltage drop of the power supply system, resulting in the voltage drop of the power supply system.

[0024] Therefore, it is necessary to obtain the power supply capacity of the power supply system in real time to realize the automatic adaptation of the charging device to the power supply capacity of the external power supply. Specifically, the maximum power supply current of the power supply system is obtained by detecting the voltage of the power supply system, adjusting the size of the charging current of the battery, and if the charging current of the battery reaches the first current threshold, in a predetermined sampling period, the total integral of the voltage drop of the power supply system is greater than twice the total integral of the voltage rise, the first current threshold is set as the maximum power supply current of the power supply system. Then set the maximum power supply current of the power supply system as the maximum charging current available to the battery. It should be understood that the voltage of the power supply system may rise or fall in a sampling period. In a predetermined sampling period, including a plurality of unit sampling periods, the voltage rises or falls in each unit sampling period. The sum of the voltage drop in each unit sampling period is taken as the total integral of the voltage drop. Similarly, the sum of the voltage rise in each unit sampling period is taken as the total integral of the voltage drop. When the total integral of the voltage drop of the power supply system is greater than twice the total integral of the voltage rise, it means that the voltage value of the power supply system has rapidly dropped, that is, the maximum current provided by the power supply system has been reached.

[0025] S102: detecting a current charging current of the battery.

[0026] S103: adjusting the current charging current of the battery according to the current charging current of the battery and a maximum charging current available for the battery, the maximum charging current available for the battery being the maximum power supply current of the power supply system.

[0027] When the current charging current of the battery is greater than the maximum charging current available for the battery, the maximum charging current available for the battery is taken as the current charging current of the battery. It should be understood that when the current charging current of the battery is greater than the maximum charging current available for the battery, it means that the power supply system is insufficient in energy at this time, and the battery needs to be current-limited to prevent the power supply system from collapsing or the intelligent charging device from stopping charging, so the current charging current of the battery needs to be adjusted.

[0028] When the current charging current of the battery is less than or equal to the maximum charging current available for the battery, the current charging current of the battery is not changed. It should be understood that when the current charging current of the battery is less than or equal to the maximum charging current available for the battery, it means that the power supply system is sufficient in energy, so the battery does not need to be current-limited, and thus the current charging current of the battery can not be adjusted.

[0029] Further, before the maximum charging current available for the battery is taken as the current charging current of the battery, the method further comprises adjusting the current charging current of the battery according to the maximum charging current available for the battery and a maximum charging current threshold.

[0030] The adjusting the current charging current of the battery according to the maximum charging current available for the battery and the maximum charging current threshold comprises: when the maximum charging current available for the battery is greater than the maximum charging current threshold, taking the maximum charging current threshold as the current charging current of the battery.

[0031] It should be understood that the maximum charging current available for the battery and the maximum charging current threshold are different. When the maximum charging current available for the battery is greater than the maximum charging current threshold, the battery should be charged according to the maximum charging current threshold to prevent damage to the battery caused by an excessively large charging current.

[0032] The adjusting the current charging current of the battery according to the maximum charging current available for the battery and the maximum charging current threshold comprises: when the maximum charging current available for the battery is less than or equal to the maximum charging current threshold, taking the maximum charging current available for the battery as the current charging current of the battery.

[0033] It should be understood that when the maximum charging current available to the battery is insufficient, the charging current does not reach the maximum charging current threshold, and thus the battery can only be charged based on the maximum charging current available, and if the charging current of the battery is too small, the battery will also be damaged, and thus before the maximum charging current available to the battery is taken as the current charging current of the battery, it further includes judging whether the maximum charging current available to the battery is less than the minimum charging current threshold of the battery, and if so, stopping charging. In this embodiment, it also includes detecting whether the current charging voltage of the battery is normal, and charging the battery only when the charging voltage is normal, detecting whether the current charging voltage of the battery is greater than the minimum charging voltage threshold and less than the maximum charging voltage threshold, and if so, the battery is charged. Preventing damage to the battery due to improper charging voltage.

[0034] According to the intelligent charging method provided by the embodiment of the application, the maximum power supply current of the power supply system is obtained, the current charging current of the battery is detected, and the current charging current of the battery is adjusted according to the current charging current of the battery and the maximum charging current available to the battery, the maximum charging current available to the battery being the maximum power supply current of the power supply system, thereby solving the problem that the power supply system provides insufficient energy to the battery in the case of insufficient energy of the power supply system, resulting in collapse of the power supply system or stopping of the intelligent charging device.

[0035] Embodiment two:

[0036] In order to solve the problem that the power supply system provides insufficient energy to the battery in the case of insufficient energy of the power supply system, resulting in collapse of the power supply system or stopping of the intelligent charging device, the embodiment of the application provides an intelligent charging method and device 20. Figure 2 The structure diagram of the intelligent charging device provided by the second embodiment of the application is shown in the figure, the intelligent charging device 20 is connected with the power supply system 30 and the battery 40, and the intelligent charging device includes:

[0037] The acquisition module 201 is configured to acquire the maximum power supply current of the power supply system.

[0038] The detection module 202 is configured to detect the current charging current of the battery.

[0039] The adjustment module 203 is configured to adjust the current charging current of the battery according to the current charging current of the battery and the maximum charging current available to the battery, the maximum charging current available to the battery being the maximum power supply current of the power supply system.

[0040] It should be understood that, without considering the power supply system energy shortage, the battery management system intelligent charging device sets the charging voltage / current, and the energy is converted from the power supply system to the battery end at the set value, so that the battery is charged according to the set condition. However, due to the frequent module damage of the power supply system, or the load fluctuation of the power supply system, or the excessive energy of the lead-acid battery mixed with the lithium battery, the power supply system energy is insufficient.

[0041] In the case of sufficient energy of the power supply system, the maximum charging current available to the battery is usually stable, but due to the possible energy shortage of the external charging system, the maximum charging current available to the battery changes. The lithium battery with battery management system will absorb the energy of the power supply system according to the set charging current under the action of the intelligent charging device of the battery management system, until the external undervoltage or the battery management system judges to stop charging. Specifically, when the current charging current of the battery is greater than the maximum charging current available to the battery, the current of the battery is too large relative to the power supply capacity of the power supply system, and according to the calculation formula: U=I*R, due to the too large current, the voltage drop of the battery increases, which leads to the increase of the internal resistance voltage drop of the power supply system, resulting in the voltage drop of the power supply system.

[0042] Therefore, it is necessary to obtain the power supply capacity of the power supply system in real time to realize that the charging device automatically adapts to the power supply capacity of the external power supply. Specifically, the maximum power supply current of the power supply system needs to be obtained, including: detecting the voltage of the power supply system; adjusting the size of the charging current of the battery; if the charging current of the battery reaches the first current threshold value, in a predetermined sampling period, the total integral of the voltage drop of the power supply system is greater than twice the total integral of the voltage rise, the first current threshold value is taken as the maximum power supply current of the power supply system. Then take the maximum power supply current of the power supply system as the maximum charging current available to the battery. It should be understood that the voltage of the power supply system may rise or fall in a sampling period. The predetermined sampling period includes a plurality of unit sampling periods, and the voltage rises or falls in each unit sampling period. The sum of the voltage drop in each unit sampling period is taken as the total integral of the voltage drop. Similarly, the sum of the voltage rise in each unit sampling period is taken as the total integral of the voltage rise. When the total integral of the voltage drop of the power supply system is greater than twice the total integral of the voltage rise in the predetermined sampling period, it means that the voltage value of the power supply system drops rapidly, that is, the maximum current provided by the power supply system has been reached.

[0043] Detecting the current charging current of the battery. The current charging current of the battery is adjusted according to the current charging current of the battery and the maximum charging current available to the battery.

[0044] when the current charging current of the battery is greater than the maximum charging current available for the battery, the maximum charging current available for the battery is taken as the current charging current of the battery, it should be understood that when the current charging current of the battery is greater than the maximum charging current available for the battery, it means that at this time, the power supply system is insufficient in energy, and the current of the battery needs to be limited to prevent the power supply system from being pulled down or the intelligent charging device from stopping charging, so the current charging current of the battery needs to be adjusted.

[0045] when the current charging current of the battery is less than or equal to the maximum charging current available for the battery, the current charging current of the battery is not changed. It should be understood that when the current charging current of the battery is less than or equal to the maximum charging current available for the battery, it means that the power supply system is sufficient in energy, so the current of the battery does not need to be limited, and therefore the current charging current of the battery can not be adjusted.

[0046] Further, the taking of the maximum charging current available for the battery as the current charging current of the battery further comprises: adjusting the current charging current of the battery according to the maximum charging current available for the battery and the maximum charging current threshold.

[0047] The adjusting of the current charging current of the battery according to the maximum charging current available for the battery and the maximum charging current threshold comprises: when the maximum charging current available for the battery is greater than the maximum charging current threshold, taking the maximum charging current threshold as the current charging current of the battery.

[0048] It should be understood that there is a difference between the maximum charging current available for the battery and the maximum charging current threshold. When the maximum charging current available for the battery is greater than the maximum charging current threshold, the charging should be carried out according to the maximum charging current threshold to prevent the charging current from being too large to cause damage to the charging battery.

[0049] The adjusting of the current charging current of the battery according to the maximum charging current available for the battery and the maximum charging current threshold comprises: when the maximum charging current available for the battery is less than or equal to the maximum charging current threshold, taking the maximum charging current available for the battery as the current charging current of the battery.

[0050] It should be understood that when the maximum charging current available for the battery is insufficient, the charging current does not reach the maximum charging current threshold, and thus the battery can only be charged based on the maximum charging current available. If the charging current of the battery is too small, the battery will be damaged. Therefore, before the maximum charging current available for the battery is used as the current charging current of the battery, it is further included that whether the maximum charging current available for the battery is less than the minimum charging current threshold of the battery is judged. If yes, the charging is stopped. In the embodiment, it is further included that whether the current charging voltage of the battery is normal is detected. The battery is charged only when the charging voltage is normal. Whether the current charging voltage of the battery is greater than the minimum charging voltage threshold and less than the maximum charging voltage threshold is detected. If yes, the battery is charged. Damage to the battery caused by improper charging voltage is prevented.

[0051] According to the intelligent charging device provided by the embodiment of the application, the maximum charging current available for the battery is the maximum power supply current of the power supply system, the current charging current of the battery is adjusted according to the current charging current of the battery and the maximum charging current available for the battery, and the problem that the power supply system provides insufficient energy to the battery in the case of insufficient energy of the power supply system, resulting in collapse of the power supply system or stop of the intelligent charging device is solved.

[0052] It should be understood by those skilled in the art that all or some steps in the method disclosed above, the functions of the modules / units in the system and the device can be implemented as software (which can be implemented by computer program codes executable by a computing device), firmware, hardware and appropriate combinations thereof. In the hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component can have multiple functions, or one function or step can be performed by several physical components in cooperation. Some or all of the physical components can be implemented as software executed by a processor such as a central processing unit, a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit such as an application specific integrated circuit.

[0053] In addition, it is well known to those skilled in the art that communication media generally includes computer readable instructions, data structures, computer program modules or other data in modulated data signals such as carriers or other transmission mechanisms, and can include any information delivery medium. Therefore, the application is not limited to any specific combination of hardware and software.

[0054] The above is a further detailed description of the embodiments of the present application in combination with specific embodiments, and cannot be deemed as limitation of the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or replacements can be made, and all of them shall be deemed as falling within the protection scope of the present application.

Claims

1. An intelligent charging method, comprising: obtaining a maximum supply current of a power supply system, including: detecting a voltage of the power supply system; adjusting a size of a charging current of a battery; in a case that the charging current of the battery reaches a first current threshold, calculating a total voltage drop integral and a total voltage rise integral of the voltage of the power supply system in a predetermined sampling period, and if the total voltage drop integral is greater than twice the total voltage rise integral, taking the first current threshold as the maximum supply current of the power supply system; detecting a current charging current of the battery; adjusting the current charging current of the battery according to the current charging current of the battery and a maximum charging current available for the battery, the maximum charging current available for the battery being the maximum supply current of the power supply system.

2. The intelligent charging method of claim 1, wherein, The adjusting the current charging current of the battery according to the current charging current of the battery and the maximum charging current available for the battery includes: when the current charging current of the battery is greater than the maximum charging current available for the battery, taking the maximum charging current available for the battery as the current charging current of the battery.

3. The intelligent charging method of claim 2, wherein, The taking the maximum charging current available for the battery as the current charging current of the battery further includes adjusting the current charging current of the battery according to the maximum charging current available for the battery and a maximum charging current threshold of the battery.

4. The intelligent charging method of claim 3, wherein, The adjusting the current charging current of the battery according to the maximum charging current available for the battery and the maximum charging current threshold of the battery includes: when the maximum charging current available for the battery is greater than the maximum charging current threshold of the battery, taking the maximum charging current threshold of the battery as the current charging current of the battery.

5. The intelligent charging method of claim 3, wherein, The adjusting the current charging current of the battery according to the maximum charging current available for the battery and the maximum charging current threshold of the battery includes: when the maximum charging current available for the battery is less than or equal to the maximum charging current threshold of the battery, taking the maximum charging current available for the battery as the current charging current of the battery.

6. The intelligent charging method of claim 5, further comprising, before said making available to the battery a maximum charging current for the battery as a current charging current for the battery: judging whether the maximum charging current available for the battery is less than a minimum charging current threshold of the battery, and if yes, stopping charging.

7. The intelligent charging method of claim 1, wherein, Further comprising detecting whether a current charging voltage of the battery is greater than a minimum charging voltage threshold and less than a maximum charging voltage threshold, and if yes, the battery is charged.

8. An intelligent charging device, characterized in that, comprising: an obtaining module, configured to obtain a maximum supply current of a power supply system, including: detecting a voltage of the power supply system; adjusting a size of a charging current of a battery; in a case that the charging current of the battery reaches a first current threshold, calculating a total voltage drop integral and a total voltage rise integral of the voltage of the power supply system in a predetermined sampling period, and if the total voltage drop integral is greater than twice the total voltage rise integral, taking the first current threshold as the maximum supply current of the power supply system; a detecting module, configured to detect a current charging current of the battery; an adjusting module, configured to adjust the current charging current of the battery according to the current charging current of the battery and a maximum charging current available for the battery, the maximum charging current available for the battery being the maximum supply current of the power supply system. An adjusting module is configured to adjust the current charging current of the battery according to the current charging current of the battery and the maximum charging current available for the battery, wherein the maximum charging current available for the battery is the maximum power supply current of the power supply system.

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