A charging method and system for power supply equipment

Abstract

The present invention relates to the field of intelligent charging technology, and in particular to a charging method for a power supply device and a system for executing the charging method. The charging method includes the following steps: A. obtaining a commonly used time period and the current time; B. calculating the expected charging time based on the current time and the commonly used time period; C. obtaining the ambient temperature around the power supply device; D. selecting a charging method for the power supply device based on the expected charging time and the ambient temperature; wherein the commonly used time period is the time period when the user uses the mobile phone on a daily basis; the charging methods include high-voltage fast charging, low-voltage fast charging, and low-voltage slow charging. The present invention selects the charging method adopted for the power supply device based on the commonly used time period, the current time, and the ambient temperature, so that when the temperature is suitable, the device is charged at low voltage to reduce heat generation to protect the power supply, and when the temperature is low, the device is charged at high voltage to increase heat generation to ensure charging efficiency, thereby achieving the effect of intelligent charging.

Description

Technical Field

[0001] The present invention relates to the field of intelligent charging technology, and in particular to a charging method and system for power supply equipment. Background Art

[0002] Portable power devices, such as mobile phones and wireless headphones, inevitably need to be charged after a period of use. The typical charging method is to directly charge the power device at a predetermined power level. Once fully charged, the device is kept charged to ensure it remains fully charged before disconnecting the charging cable.

[0003] Obviously, the above solution not only consumes power continuously but is also detrimental to the health of the power supply. Based on this, existing technologies provide intelligently regulated charging methods. For example, when charging a Huawei phone at night, it will not charge for a certain period of time based on the user's usage habits, and then charge again after the period has passed, ensuring that the phone is not kept in a fully charged state for a long time.

[0004] However, this method still has shortcomings: the ambient temperature around the power supply equipment will affect its charging efficiency, etc. The intelligent adjustment solution does not take the ambient temperature into consideration, which will inevitably affect whether the power supply is fully charged. Summary of the Invention

[0005] In view of the problems of the prior art, the present invention provides a charging method and system for a power supply device, which selects a suitable charging mode in combination with the charging time and the ambient temperature, thereby ensuring that the power supply device is charged at an appropriate temperature, thereby ensuring charging efficiency and charging effect.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a charging method for a power supply device, comprising the following steps:

[0008] A. Get common time periods and current time;

[0009] B. Calculate the expected charging time based on the current time and common time periods;

[0010] C. Obtain the ambient temperature around the power supply equipment;

[0011] D. Choose the charging method for the power supply based on the expected charging time and ambient temperature.

[0012] Among them, the commonly used time period is the time period when the user uses the mobile phone daily; the charging methods include high-voltage fast charging, low-voltage fast charging and low-voltage slow charging.

[0013] Furthermore, step B specifically includes:

[0014] B1. Determine whether the current time is within the commonly used time period. If so, proceed to step B2; otherwise, proceed to step B3.

[0015] B2. Use low-voltage fast charging to charge the power supply equipment;

[0016] B3. The difference between the current time period and the minimum time value of the next commonly used time period is used as the expected charging time.

[0017] Furthermore, step D specifically includes:

[0018] D1. Obtain the temperature around the power supply device;

[0019] D2 determines whether the temperature around the power supply device falls within a preset temperature range, if so, proceed to step D3, otherwise proceed to step D4;

[0020] D3. Obtain the current charge level of the power supply device and select a charging method based on the expected charging time.

[0021] D4. If the temperature around the power supply device exceeds the maximum value of the preset temperature range, execute step D5; if the temperature around the power supply device is lower than the minimum value of the preset temperature range, execute step D6;

[0022] D5. Charge the power supply equipment at low voltage and slow speed;

[0023] D6. Perform high-voltage fast charging on the power supply device and switch to low-voltage fast charging / low-voltage slow charging after a period of time.

[0024] Furthermore, step D3 specifically includes:

[0025] D31. Obtain the current power of the power supply device A, the total power Atotal, the charging rate s1 in the low-voltage fast charging state, the charging rate s2 in the low-voltage slow charging state, and the expected charging time t;

[0026] D32. Calculate t1 and t2 using the formula (Atotal - A) = s1*t1 + s2*t2.

[0027] D33. Charge the power supply device in the low-voltage fast charging state for t1 time, then switch to the low-voltage slow charging state until it is fully charged;

[0028] Where t=t'+t1+t2; and t' is a constant and the value of t' is 10-20min.

[0029] Furthermore, in step D33, if the power supply device is still connected to the charging device after being fully charged, the charging state is exited and low-voltage slow charging is performed after t' / 2 time has passed;

[0030] In step D32, if t2 is less than t', t1 and t2 are calculated according to the formula A=s1*t1+s2*t2 and t=t1+t2;

[0031] If t2≤0, the power supply device is charged in a low-voltage fast charging manner.

[0032] Furthermore, step D5 specifically includes:

[0033] D51. Charge the power supply device through low-voltage slow charging and obtain the ambient temperature around the power supply device;

[0034] D52. During the charging process, continuously obtain the ambient temperature around the power supply device. If the power supply device is fully charged or the ambient temperature around the power supply device is higher than the upper threshold, stop charging.

[0035] Furthermore, step D6 specifically includes:

[0036] D61. Perform high-voltage rapid charging on the power supply device and obtain the real-time temperature of the power supply device;

[0037] D62. Compare the real-time temperature of the power supply device with the preset temperature range. When the real-time temperature of the power supply device falls within the preset temperature range, obtain the real-time power of the power supply device.

[0038] D63. Calculate the critical power of the power supply device by combining the maximum value of the preset temperature range, the real-time power of the power supply device, and the real-time temperature of the power supply device;

[0039] D64. When the current charge of the power supply device reaches the critical charge, the power supply device is switched to low-voltage fast charging or low-voltage slow charging according to the value of the critical charge and the expected charging time.

[0040] Furthermore, in step D64, it specifically includes:

[0041] D641. Calculate the expected charging rate s' based on s' = (full charge - critical charge) / (expected charging time - high-voltage fast charging time - t'');

[0042] D642. Compare s' with the low-voltage fast charge rate and the low-voltage slow charge rate, respectively. If s' is greater than the low-voltage fast charge rate, switch to low-voltage fast charge for charging.

[0043] If s' is less than the low-voltage fast charging rate and greater than the low-voltage slow charging rate, switch to low-voltage fast charging;

[0044] If s' is less than the low-voltage slow charging rate, switch to low-voltage fast charging for charging; if s' is less than the low-voltage slow charging rate, switch to low-voltage slow charging for charging;

[0045] Where t'' is a constant and 0min≤t''≤20min.

[0046] Furthermore, in step D642, if s' is less than the low-voltage fast charging rate and greater than the low-voltage slow charging rate, the following steps are specifically included:

[0047] The power supply device is charged by low-voltage fast charging until the power supply device is fully charged and no further charging is performed;

[0048] The real-time time is obtained. When the real-time time reaches 10-20 minutes before the minimum value of the commonly used time period, the power supply device is continuously charged using low-voltage slow charging until the power supply device is no longer connected to the charging device.

[0049] The present invention also provides a charging system, including a controller, a power supply unit electrically connected to the controller, and a charging device. The power supply unit is used to supply power to the controller and the charging device. The charging device is used to connect to an external power supply device and charge the power supply device. The controller has a storage medium, and the storage medium stores a computer program for executing the above-mentioned charging method.

[0050] Beneficial effects of the present invention: The present invention selects the charging method for the power supply device in combination with common time periods, current time and ambient temperature, so that when the temperature is suitable, it charges at low voltage to reduce heat generation to protect the power supply, and when the temperature is low, it charges at high voltage to increase heat generation to ensure charging efficiency, thereby achieving the effect of intelligent charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Flowchart of the present invention. DETAILED DESCRIPTION

[0052] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0053] like Figure 1 As shown, the present invention provides a charging method for a power supply device, comprising the following steps:

[0054] A. Get common time periods and current time;

[0055] B. Calculate the expected charging time based on the current time and common time periods;

[0056] C. Obtain the ambient temperature around the power supply equipment;

[0057] D. Choose the charging method for the power supply based on the expected charging time and ambient temperature.

[0058] Among them, the commonly used time period is the time period when the user uses the mobile phone daily; the charging methods include high-voltage fast charging, low-voltage fast charging and low-voltage slow charging.

[0059] In actual application, this embodiment also provides a charging system for executing the above-mentioned charging method, including a controller, a power supply unit electrically connected to the controller, and a charging device. The power supply unit is used to supply power to the controller and the charging device, and the charging device is used to connect to an external power supply device and charge the power supply device. The controller has a storage medium, and the storage medium stores a computer program for executing the above-mentioned charging method.

[0060] This charging method is executed when the charging device is connected to the power supply. There are two ways to obtain the current time: directly from the power supply device and through the controller's network connection. The commonly used time period is obtained through the power supply device. When the power supply device is connected to the charging device during the commonly used time period, it is likely that the power supply device is in a "charging while in use" state. If the ambient temperature is low at this time, high-voltage fast charging is used to charge the power supply device. This ensures high heat generation during charging, allowing the power supply device to quickly heat up and maintain a suitable temperature, thereby ensuring charging efficiency.

[0061] In this embodiment, step B specifically includes:

[0062] B1. Determine whether the current time is within the commonly used time period. If so, proceed to step B2; otherwise, proceed to step B3.

[0063] B2. Use low-voltage fast charging to charge the power supply equipment;

[0064] B3. The difference between the current time period and the minimum time value of the next commonly used time period is used as the expected charging time.

[0065] If the charging time is not within the commonly used time period, it indicates that the user is charging the power supply device during a break. In order to avoid excessive charging time or power loss caused by keeping the device plugged in for too long after charging, the present invention charges the device based on the time difference between the commonly used time period and the charging time. The following example illustrates this:

[0066] For example, the common time period is from 8:00 to 23:00, and the user occasionally uses the power supply device after 23:00. Then, when the user charges the power supply device at 23:10, the charging time is from 23:10 to 8:00 the next day, which is 8 hours and 50 minutes of charging time. At this time, the present invention selects its charging mode according to the ambient temperature around the power supply device: high-voltage fast charging will cause a large amount of heat to the power supply during charging, which is easy to shorten the life of the power supply at room temperature, but at low temperatures it can ensure that the power supply is charged at a suitable temperature to ensure efficiency; the low-voltage and high-current charging method generates less heat, but when the ambient temperature is low, it cannot guarantee charging efficiency. The charging device of the present invention integrates the structure of two charging modes, which are switched according to demand, thereby ensuring that the power supply is charged at a suitable temperature and ensuring charging efficiency.

[0067] In this embodiment, step D specifically includes:

[0068] D1. Obtain the temperature around the power supply device;

[0069] D2 determines whether the temperature around the power supply device falls within a preset temperature range, if so, proceed to step D3, otherwise proceed to step D4;

[0070] D3. Obtain the current charge level of the power supply device and select a charging method based on the expected charging time.

[0071] D4. If the temperature around the power supply device exceeds the maximum value of the preset temperature range, execute step D5; if the temperature around the power supply device is lower than the minimum value of the preset temperature range, execute step D6;

[0072] D5. Charge the power supply equipment at low voltage and slow speed;

[0073] D6. Perform high-voltage fast charging on the power supply device and switch to low-voltage fast charging / low-voltage slow charging after a period of time.

[0074] That is, when the temperature is too high, the present invention needs to first quickly charge the power supply device to meet its usage requirements. However, the current of low-voltage fast charging is larger, which will inevitably generate more heat than low-voltage slow charging, and the performance of some insulation structures may even be reduced at high temperatures. Taking the suitable temperature of 0-40°C as an example, the preset ambient temperature is usually preferably between 5-35°C, which provides a certain buffer zone for the present invention to ensure the safety of the power supply.

[0075] If the ambient temperature is higher than 35°C, the present invention adopts low-voltage slow charging. If the user uses the power supply device, the charging rate will inevitably be lower than the power consumption rate, which can only ensure that the power consumption rate of the power supply is reduced. It also reminds the user to reduce the frequency of use of the power supply device at high temperatures to prevent its temperature from being too high.

[0076] If the ambient temperature is lower than 5°C, the ambient temperature will affect the performance and life of the power supply. At this time, high-voltage fast charging is used to increase the heat of the power supply, so that the power supply temperature rises and remains within the preset temperature range for charging or even charging while using, which is conducive to ensuring charging efficiency and power supply performance.

[0077] In this embodiment, step D3 specifically includes:

[0078] D31. Obtain the current power of the power supply device A, the total power Atotal, the charging rate s1 in the low-voltage fast charging state, the charging rate s2 in the low-voltage slow charging state, and the expected charging time t;

[0079] D32. Calculate t1 and t2 using the formula (Atotal - A) = s1*t1 + s2*t2.

[0080] D33. Charge the power supply device in the low-voltage fast charging state for t1 time, then switch to the low-voltage slow charging state until it is fully charged;

[0081] Where t=t'+t1+t2; and t' is a constant and the value of t' is 10-20min.

[0082] That is, during charging, in addition to temperature affecting the charging method, the current charge level of the power supply device at the time of charging is also a crucial parameter. For example, if the total charge level is 100% and A = 20% A total, then 80% A total of charge is required. Therefore, the formula in step D32 can be used to calculate the duration required for low-voltage fast charging and low-voltage slow charging, respectively. Because the present invention refers to the typical time period during which people use the power supply device, a time t' is reserved for overuse to ensure that the power supply device is fully charged when people use it in advance.

[0083] While t'=10-20min can meet most usage scenarios, that is, most of the time in the first 20 minutes or so of the commonly used time period, the power supply equipment may be used.

[0084] Since low-voltage slow charging causes less power loss than low-voltage fast charging, using low-voltage slow charging for as long as possible, while ensuring that the power supply equipment can be fully charged, can effectively ensure the safety of the power supply and slow down the rate of power attenuation.

[0085] Specifically, in step D33, if the power supply device is still connected to the charging device after being fully charged, the charging state is exited and low-voltage slow charging is performed after t' / 2 time has passed.

[0086] That is, after being fully charged, the power supply device is promptly disconnected from the power supply, allowing it to remain dormant while not charging, and only resume charging when the normal charging time is about to arrive. This method reduces the time the power supply device must be plugged into the charging device, achieving the effect of protecting the power supply.

[0087] Specifically, in step D32, if t2 is less than t', t1 and t2 are calculated according to the formula A=s1*t1+s2*t2 and t=t1+t2;

[0088] If t2≤0, the power supply device is charged in a low-voltage fast charging manner.

[0089] That is, there is a possibility that the expected charging time of a certain charge is too short, resulting in an inability to fully charge. In this situation, the present invention must ensure that the power supply device maintains low-voltage fast charging throughout the entire process to ensure that the user charges the power supply device as much as possible before using it.

[0090] Similarly, if t2 is less than t', indicating time is tight, the reserved time t' can be eliminated and charging can continue using a combination of low-voltage fast charging and low-voltage slow charging to minimize power loss. Even if the user uses a power supply device in advance, sufficient power and power safety can be guaranteed.

[0091] In this embodiment, step D5 specifically includes:

[0092] D51. Charge the power supply device through low-voltage slow charging and obtain the ambient temperature around the power supply device;

[0093] D52. During the charging process, continuously obtain the ambient temperature around the power supply device. If the power supply device is fully charged or the ambient temperature around the power supply device is higher than the upper threshold, stop charging.

[0094] That is, in high-temperature environments, the present invention only uses low-voltage slow charging to charge the power supply device, thereby reducing heat generation from the power supply and preventing further temperature increases. If the ambient temperature rises further and exceeds the upper threshold (using the above data as an example, assuming 40°C), charging of the power supply device is stopped, preventing the user from being burned by low-temperature burns caused by further heating of the power supply device.

[0095] In this embodiment, step D6 specifically includes:

[0096] D61. Perform high-voltage rapid charging on the power supply device and obtain the real-time temperature of the power supply device;

[0097] D62. Compare the real-time temperature of the power supply device with the preset temperature range. When the real-time temperature of the power supply device falls within the preset temperature range, obtain the real-time power of the power supply device.

[0098] D63. Calculate the critical power of the power supply device by combining the maximum value of the preset temperature range, the real-time power of the power supply device, and the real-time temperature of the power supply device;

[0099] D64. When the current charge of the power supply device reaches the critical charge, the power supply device is switched to low-voltage fast charging or low-voltage slow charging according to the value of the critical charge and the expected charging time.

[0100] When the ambient temperature is low, the present invention uses high-voltage fast charging, which not only ensures the charging rate but also ensures that the power supply heats up, thereby increasing the temperature of the power supply device, thereby ensuring the performance of the power supply. When the temperature reaches a certain level, it is necessary to analyze the subsequent actions: for example, if the temperature of the power supply device is currently at 30°C, the temperature decay rate is calculated based on the difference between the current temperature of the power supply device and the ambient temperature. Combined with the heat generation efficiency of the power supply device under low-voltage charging, it is possible to determine whether to maintain high-voltage fast charging or switch to low-voltage charging.

[0101] That is to say, when the power supply device is heated to the required temperature, the formula (Atotal-A)=s1*t1+s2*t2 is used to check whether the power supply device still needs fast charging. If so, it switches to low-voltage fast charging; otherwise, it switches to low-voltage slow charging.

[0102] In actual use, step D64 specifically includes:

[0103] D641. Calculate the expected charging rate s' based on s' = (full charge - critical charge) / (expected charging time - high-voltage fast charging time - t'');

[0104] D642. Compare s' with the low-voltage fast charge rate and the low-voltage slow charge rate, respectively. If s' is greater than the low-voltage fast charge rate, switch to low-voltage fast charge for charging.

[0105] If s' is less than the low-voltage fast charging rate and greater than the low-voltage slow charging rate, switch to low-voltage fast charging;

[0106] If s' is less than the low-voltage slow charging rate, switch to low-voltage fast charging for charging; if s' is less than the low-voltage slow charging rate, switch to low-voltage slow charging for charging;

[0107] Where t'' is a constant and 0min≤t''≤20min.

[0108] That is, the specific solution executed in step D64 is based on the charging rate s', while steps D641 and D642 are executed only after the power supply device reaches the required temperature. Subsequent temperature decay ensures that the power supply device does not decay to a temperature that significantly affects charging rate and performance before being fully charged.

[0109] However, if the power supply device does not generate enough heat and still does not reach the required temperature when it reaches the critical power level, high-voltage fast charging will still need to be maintained subsequently. That is, the surrounding ambient temperature has a higher priority for the charging method selection than the current power level, common time period, etc.

[0110] Specifically, in step D642, if s' is less than the low-voltage fast charging rate and greater than the low-voltage slow charging rate, the following steps are specifically included:

[0111] The power supply device is charged by low-voltage fast charging until the power supply device is fully charged and no further charging is performed;

[0112] The real-time time is obtained. When the real-time time reaches 10-20 minutes before the minimum value of the commonly used time period, the power supply device is continuously charged using low-voltage slow charging until the power supply device is no longer connected to the charging device.

[0113] That is, when s' is exactly at the middle value, the present invention tends to directly use low-voltage fast charging to fully charge the power supply, thereby ensuring that charging is completed before the temperature of the power supply device decays to a temperature that is not much different from the surrounding ambient temperature; the power supply device is then kept in a dormant state until before a commonly used time period (for example, 7:40), and low-voltage slow charging is continued, thereby ensuring that the power supply device is fully charged before the user unplugs the power supply device from the charging device.

[0114] It should be noted that the ambient temperature surrounding the power supply device can be obtained by a temperature sensor built into the power supply device, or a temperature sensor integrated into the charging device and connected to the controller signal can also be used. Preferably, since the present invention not only involves the ambient temperature of the surrounding environment but also the temperature of the power supply device itself, it is necessary to obtain the temperature of the power supply device itself by collecting data from the power supply device, and to collect the ambient temperature using the temperature sensor of the charging device.

[0115] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A charging method for a power supply device, characterized in that: The following steps are involved: A. Get common time periods and current time; B. Calculate the expected charging time based on the current time and common time periods; C. Obtain the ambient temperature around the power supply equipment; D. Choose the charging method for the power supply based on the expected charging time and ambient temperature. The commonly used time period is the time period during which the user uses the mobile phone on a daily basis; the charging modes include high-voltage fast charging, low-voltage fast charging, and low-voltage slow charging; Step B specifically includes: B1. Determine whether the current time is within the commonly used time period. If so, proceed to step B2; otherwise, proceed to step B3. B2. Use low-voltage fast charging to charge the power supply equipment; B3. The difference between the current time period and the minimum time value of the next commonly used time period is used as the expected charging time; Step D specifically includes: D1. Obtain the temperature around the power supply device; D2 determines whether the temperature around the power supply device falls within a preset temperature range, if so, proceed to step D3, otherwise proceed to step D4; D3. Obtain the current charge level of the power supply device and select a charging method based on the expected charging time. D4. If the temperature around the power supply device exceeds the maximum value of the preset temperature range, execute step D5; if the temperature around the power supply device is lower than the minimum value of the preset temperature range, execute step D6; D5. Charge the power supply equipment at low voltage and slow speed; D6. Perform high-voltage fast charging on the power supply device, and switch to low-voltage fast charging / low-voltage slow charging after a period of time; Step D3 specifically includes: D31. Obtain the current power of the power supply device A, the total power Atotal, the charging rate s1 in the low-voltage fast charging state, the charging rate s2 in the low-voltage slow charging state, and the expected charging time t; D32. Calculate t1 and t2 using the formula (Atotal - A) = s1*t1 + s2*t2. D33. Charge the power supply device in the low-voltage fast charging state for t1 time, then switch to the low-voltage slow charging state until it is fully charged; Where t=t'+t1+t2; and t' is a constant and the value of t' is 10-20min; In step D33, if the power supply device is still connected to the charging device after being fully charged, the charging state is exited and low-voltage slow charging is performed after t' / 2 time has passed; In step D32, if t2 is less than t', t1 and t2 are calculated according to the formula A=s1*t1+s2*t2 and t=t1+t2; If t2≤0, the power supply device is charged in a low-voltage fast charging manner.

2. The charging method of the power supply device according to claim 1, characterized in that: Step D5 specifically includes: D51. Charge the power supply device through low-voltage slow charging and obtain the ambient temperature around the power supply device; D52. During the charging process, continuously obtain the ambient temperature around the power supply device. If the power supply device is fully charged or the ambient temperature around the power supply device is higher than the upper threshold, stop charging.

3. The charging method of the power supply device according to claim 1, characterized in that: Step D6 specifically includes: D61. Perform high-voltage rapid charging on the power supply device and obtain the real-time temperature of the power supply device; D62. Compare the real-time temperature of the power supply device with the preset temperature range. When the real-time temperature of the power supply device falls within the preset temperature range, obtain the real-time power of the power supply device. D63. Calculate the critical power of the power supply device by combining the maximum value of the preset temperature range, the real-time power of the power supply device, and the real-time temperature of the power supply device; D64. When the current charge of the power supply device reaches the critical charge, the power supply device is switched to low-voltage fast charging or low-voltage slow charging according to the value of the critical charge and the expected charging time.

4. The charging method of the power supply device according to claim 3, characterized in that: In step D64, it specifically includes: D641. Calculate the expected charging rate s' based on s' = (full charge - critical charge) / (expected charging time - high-voltage fast charging time - t''); D642. Compare s' with the low-voltage fast charge rate and the low-voltage slow charge rate, respectively. If s' is greater than the low-voltage fast charge rate, switch to low-voltage fast charge for charging. If s' is less than the low-voltage fast charging rate and greater than the low-voltage slow charging rate, switch to low-voltage fast charging; If s' is less than the low-voltage slow charging rate, switch to low-voltage slow charging for charging; Where t'' is a constant and 0min≤t''≤20min.

5. The charging method of the power supply device according to claim 4, characterized in that: In step D642, if s' is less than the low-voltage fast charging rate and greater than the low-voltage slow charging rate, the following steps are specifically included: The power supply device is charged by low-voltage fast charging until the power supply device is fully charged and no further charging is performed; The real-time time is obtained. When the real-time time reaches 10-20 minutes before the minimum value of the commonly used time period, the power supply device is continuously charged using low-voltage slow charging until the power supply device is no longer connected to the charging device.

6. A charging system comprising a controller, a power supply unit electrically connected to the controller, and a charging device, wherein the power supply unit is used to supply power to the controller and the charging device, and the charging device is used to connect to an external power supply device and charge the power supply device, characterized in that: The controller has a storage medium storing a computer program for executing the charging method according to any one of claims 1 to 5.

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