Charging control method and power supply device

Abstract

The invention discloses a charging control method and a power supply device, and the method comprises the following steps: obtaining the current temperature of a battery, so as to detect whether the current temperature is lower than a first threshold value or higher than a second threshold value or not; wherein the second threshold value is greater than the first threshold value; and if the current temperature is lower than the first threshold value or higher than the second threshold value, controlling a switching power supply to be disconnected from the battery so as to enable the switching power supply to supply power to a system of the electronic equipment, and controlling a charge pump to charge the battery. According to the charging control method provided by the invention, the charging efficiency of the battery in the rapid charging process can be guaranteed, and the heating phenomenon of the electronic equipment in the rapid charging process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fast charging, and particularly to a charging control method and a power supply device. Background Art

[0002] With the development of fast charging technology, charge pumps have been widely used in the fast charging technology of electronic devices due to their high efficiency characteristics. In order to improve the charging capacity of the battery fast charging system and enable the battery fast charging system to meet a wider range of usage scenarios, the existing battery fast charging system can, during the fast charging stage, control the configuration and activation of the charge pump and the switching power supply according to the charging capacity parameters of the power supply device, the charge pump, and the switching power supply by means of a main control chip, and adjust the output voltage value of the power supply device during the fast charging stage. However, the battery is greatly affected by the ambient temperature. The existing battery fast charging system lacks sufficient consideration of the influence of temperature, and adopts a unified charging strategy under ambient conditions of normal temperature, high temperature, or low temperature, and is unable to dynamically optimize the charging scheme according to the parameter changes of the battery, resulting in low charging efficiency of the existing battery fast charging system in the high and low temperature states of the battery, and it is easy to cause the electronic device to heat up during the fast charging process. Summary of the Invention

[0003] The present invention provides a charging control method and a power supply device, which can solve the problems of low charging efficiency of the existing battery fast charging system in the high and low temperature states of the battery and easy heating of the electronic device during the fast charging process.

[0004] In a first aspect of the present invention, a charging control method is provided. The charging control method includes: obtaining the current temperature of the battery to detect whether the current temperature is lower than a first threshold or higher than a second threshold, where the second threshold is greater than the first threshold; and if the current temperature is lower than the first threshold or the current temperature is higher than the second threshold, controlling the switching power supply to be decoupled from the battery so that the switching power supply supplies power to the system of the electronic device, and controlling the charge pump to charge the battery.

[0005] In a second aspect of the present invention, a power supply device is provided. The power supply device includes a controller, a charge pump, and a switching power supply. The charge pump and the switching power supply are both electrically coupled to the controller, and the charge pump and the switching power supply are both electrically coupled to an external power supply device; wherein the controller is configured to: obtain the current temperature of the battery to detect whether the current temperature is lower than a first threshold or higher than a second threshold, where the second threshold is greater than the first threshold; and if the current temperature is lower than the first threshold or the current temperature is higher than the second threshold, control the switching power supply to be decoupled from the battery so that the switching power supply supplies power to the system of the electronic device, and control the charge pump to charge the battery.

[0006] The charging control method according to the present invention can dynamically adjust the charging strategy of the battery according to the operating parameters and state parameters of the battery, the charge pump, and the switching power supply, so as to ensure the charging efficiency of the battery during fast charging and improve the heat generation phenomenon of the electronic device during fast charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a flowchart of the steps of the charging control method according to an embodiment of the present invention; Figure 2 It is a schematic diagram of a charging scenario according to an embodiment of the present invention; Figure 3 It is a schematic diagram of another charging scenario according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] To describe in detail the technical content, the achieved objectives, and the effects of the present invention, the following is described in conjunction with the embodiments and with reference to the accompanying drawings.

[0009] In the existing electronic device, during the charging process of the battery, the controller is respectively communicatively connected to the power supply device, the charge pump, and the switching power supply. The charge pump is respectively connected to the power supply device and the battery, and the switching power supply is respectively connected to the power supply device and the battery. When the battery enters the fast charging stage, both the charge pump and the switching power supply are in the on state, and the controller configures the charge pump and the switching power supply according to the charging capacity parameters of the power supply device, the charging capacity parameters of the charge pump, and the charging capacity parameters of the switching power supply.

[0010] However, in the case of high temperature or low temperature of the battery, the relevant parameters of battery charging are greatly affected by temperature. Even when the same power supply device is selected, different charging strategies need to be adopted in the case of high temperature or low temperature of the battery to ensure the speed and efficiency of fast charging of the battery.

[0011] To solve the above technical problems, the present invention provides a novel charging control method. According to the technical solution of the present invention, the controller realizes the system control of battery charging through the charge pump and the switching chip. Based on the currently monitored temperature and voltage parameters of the battery, the controller dynamically regulates the charging process of the switching power supply. At the same time, by precisely adjusting the input voltage value of the charge pump and switching the working mode of the charge pump according to the working state, the optimal control of the charging process is realized.

[0012] In the technical solution of the present invention, when the battery is in a high-temperature or low-temperature state, in order to increase the charging speed, when the parameters of its charging device (charger) meet the conditions, the battery is charged at full current by the charge pump, and the switching power supply only supplies power to the system and does not charge the battery, so as to achieve the maximum current charging speed. At the same time, when the charging device meets the requirements of the charge pump charging protocol, the power of the charger is greater than the charging power of the battery, and the charging power of the charge pump is greater than the charging power of the battery. Under this condition, the charge pump is controlled to output only the maximum charging power of the current battery, and the switching power supply only supplies power to the system and closes the charging path to the battery.

[0013] Figure 1 FIG. 4 is a flowchart showing a charging control method 100 according to an embodiment of the present invention. The charging control method 100 includes the following steps 102 and 104.

[0014] In step 102, the current temperature of the battery is obtained to detect whether the current temperature is lower than a first threshold or higher than a second threshold. In this embodiment, the second threshold is greater than the first threshold.

[0015] In some embodiments, the first threshold includes a temperature value lower than the normal operating temperature of the battery, and the second threshold includes a temperature value higher than the normal operating temperature of the battery. In step 104, if the current temperature is lower than the first threshold or the current temperature is higher than the second threshold, the switching power supply is controlled to be decoupled from the battery so that the switching power supply supplies power to the system of the electronic device, and the charge pump is controlled to charge the battery.

[0016] According to the technical solution of the present invention, when the battery is in a high-temperature or low-temperature state, when the controller determines that the maximum charging power of the current battery is lower than the rated power of the charge pump and the charging power that the charging device can provide is higher than the current maximum power of the battery, the switching power supply only supplies power to the system and does not charge the battery, and the charge pump is controlled to charge the battery.

[0017] It is easy to understand that in the state of the current temperature of the battery, the maximum charging power of the battery is determined by its own properties. The battery has a corresponding maximum charging current at different temperatures, and the charging power of the battery is equal to the product of the charging current and the charging voltage. Correspondingly, the rated power of the charge pump, or the maximum charging power of the charge pump, is determined by the properties of the charge pump itself. The charging power that the charging device can provide refers to the maximum output power that the charger can output.

[0018] Since the maximum charging current of the battery decreases at high or low temperatures compared to the maximum charging current at normal temperature, this charging control method monitors the temperature of the battery. When the battery is at high or low temperature, only the charge pump is used to charge the battery, which can achieve the effect of reducing the charging current. At the same time, the charge pump has high efficiency, which can ensure the charging efficiency and charging speed of the battery and reduce energy consumption waste.

[0019] Figure 2 FIG. is a schematic diagram of a charging scenario according to an embodiment of the present invention. Refer to Figure 2 , in some embodiments, the controller controls the switching power supply to be decoupled from the battery so that the switching power supply supplies power to the system of the electronic device. In some embodiments, it is controlled that the switching power supply does not charge the battery, and the switching power supply supplies power to the system of the electronic device to allow the system of the electronic device to supply power to electrical loads other than the charging of the battery.

[0020] In addition, in some embodiments, the controller controls the charge pump to charge the battery. In some embodiments, it is controlled that the charge pump charges the battery separately and does not supply power to the system of the electronic device.

[0021] When the electronic device is not connected to a charging device through a charging apparatus, the system of the electronic device is powered by the battery. When the electronic device is connected to a charging device, the charging apparatus charges the system of the electronic device through the switching power supply, which can enable the battery not to supply power to the system of the electronic device during the charging process, thereby further improving the charging efficiency and charging speed of the battery.

[0022] Specifically, when the battery is in a high or low temperature state and the parameters of the power supply device meet the conditions, the charge pump charges the battery at full current, and the switching power supply only supplies power to the system of the electronic device to ensure the operational reliability of the system of the electronic device. At the same time, the switching power supply does not charge the battery, but the charge pump charges the battery separately to enable the battery to achieve the maximum charging speed. Herein, the system of the electronic device described in the present invention generally refers to the power consumption of the electronic device other than the charging of the battery.

[0023] The charging control method provided by the present invention can dynamically adjust the charging strategy of the battery according to the operating parameters of the battery, charge pump, and switching power supply. When the battery is in a high or low temperature state and the output power of the switching power supply can meet the power consumption requirements of the system of the electronic device, the charge pump only charges the battery to ensure the charging efficiency of the battery.

[0024] Figure 3Schematic diagram of another charging scenario according to an embodiment of the present invention. Refer to Figure 3 , in some embodiments, if the current temperature is between the first threshold and the second threshold, then control the switching power supply to be coupled to the battery, and control the switching power supply and the charge pump to charge the battery simultaneously.

[0025] When the current temperature of the battery is between the first threshold and the second threshold, the battery is within the normal temperature range. At this time, the battery can be charged by the switching power supply and the battery simultaneously.

[0026] In some embodiments, the first threshold is a temperature value lower than the lowest operating temperature of the battery, and the second threshold is a temperature value higher than the highest operating temperature of the battery.

[0027] The charging current and the maximum charging voltage of the battery are different in different temperature ranges. As an example, the characteristics of a battery are as follows.

[0028] When the temperature of the battery is between the preset low-temperature range of 0°C to 15°C, the maximum charging current of the battery is 2400000 μA, and the maximum charging voltage is 4400000 μV.

[0029] When the temperature of the battery is between the preset normal-temperature range of 15°C to 45°C, the maximum charging current of the battery is 10000000 μA, and the maximum charging voltage is 4400000 μV.

[0030] When the temperature of the battery is between the preset high-temperature range of 45°C to 60°C, the maximum charging current of the battery is 6000000 μA, and the maximum charging voltage is 4200000 μV.

[0031] According to the above example, the first threshold of the battery is 15°C, and the second threshold is 45°C.

[0032] When the battery is in a high-temperature or low-temperature state, the maximum charging current of the battery decreases. Therefore, the charging control method provided by the present invention controls the disconnection of the coupling between the switching power supply and the battery when the battery is in a high-temperature or low-temperature state, so that the battery is charged only by the charge pump, which can achieve the effect of reducing the charging current. At the same time, the charge pump has high efficiency, which can ensure the charging efficiency and charging speed of the battery.

[0033] In some embodiments, if the charging power provided by the power supply device is greater than the maximum charging power of the battery, and the charging power of the charge pump is greater than or equal to the maximum charging power of the battery, then control the switching power supply to only supply power to the system of the electronic device, turn off the charging path of the switching power supply to the battery, control the charge pump to only supply power to the battery, and the charge pump outputs the current maximum charging power of the battery.

[0034] When the output power of the power supply device is greater than or equal to the charging power of the battery, and the charging power of the charge pump is greater than or equal to the charging power of the battery, the charge pump charges the battery with full current. At this time, the switching power supply only supplies power to the system and does not charge the battery, so as to achieve the maximum charging speed of the battery. This charging control method provided by this embodiment can dynamically adjust the charging strategy according to the temperature of the battery. It has a wide range of applications and can ensure the fast charging efficiency and fast charging speed of the battery in environments with low temperature in winter or high temperature in summer.

[0035] In some embodiments, controlling the charge pump to charge the battery includes: controlling the input voltage and working mode of the charge pump according to the maximum charging power of the battery to adjust the output power of the charge pump so that the output power of the charge pump is equal to the maximum charging power of the battery.

[0036] When the output power of the power supply device is greater than the charging power of the battery, and the charging power of the charge pump is greater than the charging power of the battery, the charge pump charges the battery with full current. The switching power supply only supplies power to the system load and does not charge the battery, so as to achieve the maximum charging speed of the battery. This charging control method provided by this embodiment can dynamically adjust the charging strategy according to the temperature of the battery. It has a wide range of applications and can ensure the fast charging efficiency and fast charging speed of the battery in environments with low temperature in winter or high temperature in summer.

[0037] Specifically, the controller controls the charge pump and the switching power supply to charge the battery. The controller controls the input voltage and working mode of the charge pump according to the charging parameters of the battery to adjust the output current of the charge pump, so that the fast charging system can adjust the input parameters of the battery charging according to the temperature, and further ensure the charging efficiency and charging speed of the battery in high temperature or low temperature states.

[0038] As an example, the charge pump has three operating modes: 1:1 mode, 1:2 mode, and 1:3 mode. The charge pump outputs 12V / 5A in 1:1 mode, 6V / 10A in 1:2 mode, and 4V / 15A in 1:3 mode. Therefore, the controller can dynamically adjust the output voltage and output current of the charger according to the charging parameters of the battery.

[0039] Referring to Figure 2 and Figure 3 , in some embodiments, when the power supply output of the switching power supply is less than the power supply demand of the system, or when the switching power supply is in the off state, control the charge pump to supply power to the system of the electronic device.

[0040] In the technical solution of the invention, when the battery is in a high-temperature or low-temperature state, in order to improve the charging efficiency, only the charge pump charges the battery, while the switching power supply only supplies power to the system; when the power supply of the system is insufficient, or when the switching power supply is in the off state, the controller can control the charge pump to supply power to the system of the electronic device, so as to ensure the reliability of the operation of the system of the electronic device while ensuring the charging efficiency of the battery.

[0041] In some embodiments, controlling the charge pump to supply power to the system of the electronic device includes: adjusting the output current of the charge pump according to the required current of the system of the electronic device, so that the output current of the charge pump is equal to the sum of the required current of the system of the electronic device and the charging current of the battery.

[0042] Specifically, when the power supply output of the switching power supply is less than the power supply demand of the system, or when the switching power supply is in the off state, the charge pump supplies power to the system.

[0043] In the case where the switching power supply is off, the power supply of the system and the charging of the battery are both provided by the charge pump. Therefore, the power consumption of the system is dynamically changing. Therefore, the controller dynamically adjusts the output current of the charge pump according to the power supply demand of the system, so that the output current of the charge pump Ichargepump = the charging current of the battery Ibat + the required current of the system Isys.

[0044] The charging control method provided by the present invention can ensure both the charging efficiency of the battery and the reliability of the operation of the system.

[0045] In some embodiments, if the current temperature is lower than the first threshold or the current temperature is higher than the second threshold, obtain the temperature of the charge pump. When the temperature of the charge pump is higher than the third threshold, control the switching power supply to be coupled to the battery, so that the switching power supply and the charge pump charge the battery simultaneously.

[0046] When the charge pump charges the battery alone or powers the battery and the system load alone, it is likely to cause the temperature of the charge pump to rise. The charging control method provided by the present invention can also monitor the temperature of the charge pump. When the charge pump is in a high-temperature state, the switching power supply chip and the charge pump jointly supply power to the system load and the battery to reduce the heat generation of the charge pump, thereby improving the situation of local heating of the electronic device.

[0047] In some embodiments, the charge pump is adjusted according to the maximum charging current of the battery and the output current of the switching power supply.

[0048] When the charge pump enters a high-temperature state, the switching power supply and the charge pump charge the battery together. At this time, the controller can adjust the charge pump according to the output current of the switching power supply and the maximum charging current of the battery to reduce the heat generation of the charge pump while ensuring the battery charging efficiency.

[0049] The present invention also provides a power supply device. The power supply device is used to charge the battery and supply power to the system of the electronic device. The power supply device includes a controller, a charge pump, and a switching power supply. The charge pump and the switching power supply are both electrically coupled to the controller, and the charge pump and the switching power supply are both electrically coupled to an external power supply device.

[0050] The controller is configured to: obtain the current temperature of the battery to detect whether the current temperature is lower than a first threshold or higher than a second threshold, where the second threshold is greater than the first threshold; in addition, the controller is configured to, if the current temperature is lower than the first threshold or the current temperature is higher than the second threshold, control the switching power supply to be decoupled from the battery so that the switching power supply supplies power to the system of the electronic device, and control the charge pump to charge the battery.

[0051] It should be understood that the controller can be further configured to execute the corresponding steps or actions in the charging control method described in the above embodiments, which will not be elaborated here.

[0052] In summary, the battery fast charging method provided by the present invention can dynamically adjust the charging strategy of the battery according to the operating parameters and state parameters of the battery, the charge pump, and the switching power supply to ensure the charging efficiency of the battery during fast charging and improve the heat generation phenomenon of the electronic device during fast charging.

[0053] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent transformations made using the content of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A charging control method, characterized in that, Comprising: Obtaining the current temperature of the battery to detect whether the current temperature is lower than a first threshold or higher than a second threshold, where the second threshold is greater than the first threshold; And If the current temperature is lower than the first threshold or the current temperature is higher than the second threshold, controlling the switching power supply to be decoupled from the battery so that the switching power supply powers the system of the electronic device, and controlling the charge pump to charge the battery.

2. The charging control method according to claim 1, wherein Controlling the switching power supply to be decoupled from the battery so that the switching power supply powers the system of the electronic device includes: Controlling the switching power supply not to charge the battery, and controlling the switching power supply to power the system of the electronic device to allow the system of the electronic device to power electrical loads other than charging the battery.

3. The charging control method according to claim 1, wherein Controlling the charge pump to charge the battery includes: Controlling the charge pump to charge the battery separately, and controlling the charge pump not to power the system of the electronic device.

4. The charging control method according to claim 1, wherein Further comprising: If the current temperature is between the first threshold and the second threshold, controlling the switching power supply to be coupled to the battery, and controlling the switching power supply and the charge pump to charge the battery simultaneously.

5. The charging control method according to claim 1, wherein The first threshold includes a temperature value lower than the normal operating temperature of the battery, and the second threshold includes a temperature value higher than the normal operating temperature of the battery.

6. The charging control method according to claim 1, wherein Controlling the switching power supply to be decoupled from the battery so that the switching power supply powers the system of the electronic device, and controlling the charge pump to charge the battery includes: If the charging power provided by the power supply device is greater than the maximum charging power of the battery, and the charging power of the charge pump is greater than or equal to the maximum charging power of the battery, controlling the switching power supply to only power the system of the electronic device, closing the charging path of the switching power supply to the battery, controlling the charge pump to only power the battery, and the charge pump outputs the current maximum charging power of the battery.

7. The charging control method according to claim 1, wherein Controlling the charge pump to charge the battery includes: Controlling the input voltage and operating mode of the charge pump according to the maximum charging power of the battery to adjust the output power of the charge pump so that the output power of the charge pump is equal to the maximum charging power of the battery.

8. The charging control method according to claim 1, wherein Further comprising: When the power supply output of the switching power supply is less than the power supply demand of the system load, or the switching power supply is in the off state, controlling the charge pump to power the system of the electronic device.

9. The charging control method according to claim 8, wherein Controlling the charge pump to power the system of the electronic device includes: Adjusting the output current of the charge pump according to the demand current of the system of the electronic device so that the output current of the charge pump is equal to the sum of the demand current of the system load of the electronic device and the charging current of the battery.

10. The charging control method according to claim 1, wherein Further comprising: Adjusting the charge pump according to the maximum charging current of the battery and the output current of the switching power supply.

11. A power supply device, characterized in that, It includes a controller, a charge pump, and a switching power supply. The charge pump and the switching power supply are both electrically coupled to the controller, and the charge pump and the switching power supply are both electrically coupled to an external power supply device; wherein the controller is configured to: obtain the current temperature of the battery to detect whether the current temperature is lower than a first threshold or higher than a second threshold, the second threshold being greater than the first threshold; and if the current temperature is lower than the first threshold or the current temperature is higher than the second threshold, then control the switching power supply to be disconnected from the battery so that the switching power supply supplies power to the system of the electronic device, and control the charge pump to charge the battery.

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