Charging device and charging method

Abstract

A charging device and a charging method are provided. The charging device comprises: a boost circuit for boosting the output voltage of a power supply device; a charging channel for charging a battery according to the boosted voltage; and a communication control circuit for communicating with the power supply device to instruct the power supply device to adjust the output voltage and / or output current so that the output voltage and / or output current of the boost circuit match the current charging demand of the battery. In the process of charging the battery, the charging device adjusts the output voltage and / or output current of the power supply device so that the boost circuit matches the current charging demand of the battery, thereby reducing the voltage conversion demand of the boost circuit, reducing the heat generated at the boost circuit, and thus reducing the heat generated by the device to be charged.

Description

Technical Field

[0001] The present application relates to the field of charging, and more specifically, to a charging device and a charging method. Background Art

[0002] At present, charging devices (such as smart phones) are becoming more and more popular among consumers, but they consume a lot of power and need to be charged frequently. However, in the traditional charging method, the heating of the charging device is serious, especially in the case of high-power charging, the heating phenomenon is more prominent. Therefore, how to reduce the heating of the charging device is an urgent problem to be solved. Summary of the invention

[0003] The present application provides a charging device and a charging method, which can improve the heat generation of a device to be charged during the charging process.

[0004] In a first aspect, a charging device is provided, comprising: a boost circuit for boosting an output voltage of a power supply device; a charging channel for charging a battery according to the boosted voltage; and a communication control circuit for communicating with the power supply device to instruct the power supply device to adjust the output voltage and / or output current so that the output voltage and / or output current of the boost circuit matches the charging requirements of the battery.

[0005] In a second aspect, a device to be charged is provided, comprising: a battery; and a charging device as in the first aspect and various implementations of the first aspect.

[0006] In a third aspect, a charging method is provided, comprising: boosting the output voltage of a power supply device using a boost circuit; charging a battery according to the boosted voltage using a charging channel; and communicating with the power supply device using a communication control circuit to instruct the power supply device to adjust the output voltage and / or output current so that the output voltage and / or output current of the boost circuit matches the charging requirements of the battery.

[0007] The technical solution provided by the present application, during the process of charging the battery, adjusts the output voltage and / or output current of the power supply device so that the output voltage and / or output current of the boost circuit matches the current charging demand of the battery. This can reduce the voltage conversion demand of the boost circuit, reduce the heat generated at the boost circuit, and thus reduce the heat generated by the device to be charged. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic structural diagram of a charging system provided in an embodiment of the present application.

[0009] Figure 2It is a schematic structural diagram of another charging system provided in an embodiment of the present application.

[0010] Figure 3 It is a schematic structural diagram of another charging system provided in an embodiment of the present application.

[0011] Figure 4 It is a schematic structural diagram of another charging system provided in an embodiment of the present application.

[0012] Figure 5 It is a schematic structural diagram of another charging system provided in an embodiment of the present application.

[0013] Figure 6 It is a schematic diagram of a device to be charged provided in an embodiment of the present application.

[0014] Figure 7 It is a schematic flow chart of a charging method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0015] The related art mentions a power supply device for charging a device to be charged. The power supply device operates in a constant voltage mode. In the constant voltage mode, the voltage output by the power supply device is basically kept constant, such as 5V, 9V, 12V or 20V.

[0016] The voltage output by the power supply device is not suitable for being directly loaded onto both ends of the battery, but needs to be converted by a conversion circuit in the device to be charged to obtain the expected charging voltage and / or charging current of the battery in the device to be charged.

[0017] The conversion circuit is used to convert the voltage output by the power supply device to meet the expected charging voltage and / or charging current requirements of the battery.

[0018] As an example, the conversion circuit may refer to a charging management module or a charging management circuit, such as a charging integrated circuit (IC). During the charging process of the battery, it is used to manage the charging voltage and / or charging current of the battery. The conversion circuit has the function of a voltage feedback module and / or has the function of a current feedback module to achieve the management of the charging voltage and / or charging current of the battery.

[0019] For example, the charging process of the battery may include one or more of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage. In the trickle charging stage, the conversion circuit may use a current feedback loop so that the current entering the battery in the trickle charging stage satisfies the expected charging current size of the battery (such as a first charging current). In the constant current charging stage, the conversion circuit may use a current feedback loop so that the current entering the battery in the constant current charging stage satisfies the expected charging current size of the battery (such as a second charging current, which may be greater than the first charging current). In the constant voltage charging stage, the conversion circuit may use a voltage feedback loop so that the size of the voltage loaded to both ends of the battery in the constant voltage charging stage satisfies the expected charging voltage size of the battery.

[0020] As an example, when the voltage output by the power supply device is greater than the expected charging voltage of the battery, the conversion circuit can be used to step down the voltage output by the power supply device so that the charging voltage obtained after the step-down conversion meets the expected charging voltage requirement of the battery. As another example, when the voltage output by the power supply device is less than the expected charging voltage of the battery, the conversion circuit can be used to step up the voltage output by the power supply device so that the charging voltage obtained after the step-up conversion meets the expected charging voltage requirement of the battery.

[0021] As another example, taking the power supply device outputting a constant voltage of 5V as an example, when the battery includes a single battery cell, the conversion circuit (such as a Buck step-down circuit) can step down the voltage output by the power supply device so that the charging voltage obtained after the step-down meets the expected charging voltage requirement of the battery.

[0022] As another example, taking the power supply device outputting a constant voltage of 5V as an example, when the power supply device charges a battery having two or more single cells connected in series, a conversion circuit (such as a Boost circuit) can boost the voltage output by the power supply device so that the charging voltage obtained after the boost meets the expected charging voltage requirement of the battery.

[0023] The conversion circuit is limited by the low circuit conversion efficiency, causing the unconverted electrical energy to be dissipated in the form of heat. This part of the heat will be focused inside the device to be charged. The design space and heat dissipation space of the device to be charged are very small (for example, the physical size of the mobile terminals used by users is getting thinner and lighter, and a large number of electronic components are densely arranged in the mobile terminals to improve the performance of the mobile terminals). This not only increases the difficulty of designing the conversion circuit, but also makes it difficult to remove the heat focused in the device to be charged in time, which in turn causes abnormalities in the device to be charged.

[0024] For example, the heat accumulated on the conversion circuit may cause thermal interference to the electronic components near the conversion circuit, causing abnormal operation of the electronic components. For another example, the heat accumulated on the conversion circuit may shorten the service life of the conversion circuit and nearby electronic components. For another example, the heat accumulated on the conversion circuit may cause thermal interference to the battery, which in turn causes abnormal battery charging and discharging. For another example, the heat accumulated on the conversion circuit may cause the temperature of the device to be charged to rise, affecting the user's experience during charging. For another example, the heat accumulated on the conversion circuit may cause the conversion circuit itself to short-circuit, causing the voltage output by the power supply device to be directly loaded on both ends of the battery, causing abnormal charging. If the battery is in an overvoltage charging state for a long time, it may even cause the battery to explode, endangering user safety.

[0025] Therefore, how to reduce the heat generation of the device to be charged becomes an urgent problem to be solved.

[0026] The power supply device mentioned in the embodiment of the present application may be a power supply device with adjustable output voltage. The power supply device is capable of obtaining battery status information. The battery status information may include the current battery power information, voltage information, temperature information, charging voltage and / or charging current, etc. The power supply device can adjust the output voltage of the power supply device itself according to the acquired battery status information to meet the expected charging voltage and / or charging current requirements of the battery, and the voltage output by the power supply device after adjustment can be directly loaded onto the two ends of the battery to charge the battery (hereinafter referred to as "direct charging"). Furthermore, in the constant current charging stage of the battery charging process, the voltage output by the power supply device after adjustment can be directly loaded onto the two ends of the battery to charge the battery.

[0027] The power supply device may have the function of a voltage feedback module and the function of a current feedback module to manage the charging voltage and / or charging current of the battery.

[0028] The power supply device adjusts its own output voltage according to the acquired battery status information, which may mean that the power supply device is able to acquire the battery status information in real time, and adjust the voltage output by the power supply device itself according to the real-time battery status information acquired each time, so as to meet the expected charging voltage and / or charging current of the battery.

[0029] The power supply device adjusts its own output voltage according to the battery status information obtained in real time, which can mean that as the battery voltage continues to rise during the charging process, the power supply device can obtain the current status information of the battery at different times during the charging process, and adjust the power supply device's own output voltage in real time according to the current status information of the battery to meet the expected charging voltage and / or charging current requirements of the battery.

[0030] For example, the charging process of the battery may include at least one of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage. In the trickle charging stage, the power supply device may output a first charging current to charge the battery in the trickle charging stage to meet the expected charging current requirement of the battery (the first charging current may be a constant DC current). In the constant current charging stage, the power supply device may use a current / voltage feedback loop to make the current output by the power supply device and entering the battery in the constant current charging stage meet the expected charging current requirement of the battery (for example, the second charging current may be a current of a pulsating waveform, which may be greater than the first charging current, and may be a current peak value of a pulsating waveform in the constant current charging stage greater than the constant DC current size in the trickle charging stage, and the constant current in the constant current charging stage may refer to the current peak value or average value of the pulsating waveform remaining substantially unchanged). In the constant voltage charging stage, the power supply device may use a voltage / current feedback loop to keep the voltage (i.e., a constant DC voltage) output by the power supply device to the device to be charged in the constant voltage charging stage constant.

[0031] The charging process described above can be applied to the charging process of a battery including a single battery cell, and can also be applied to the charging process of a battery including multiple battery cells.

[0032] For a battery including multiple cells connected in series, the charging stage of the battery may also include a trickle charging stage, a constant current charging stage, and a constant voltage charging stage, and the charging process of each stage is similar to the charging process described above. In each charging stage, the magnitude of the charging voltage / current provided by the power supply device meets the total voltage / current requirements of the multiple cells expected in each stage.

[0033] For example, in different charging stages, the charging voltage / current of each cell in the multi-cell needs to be balanced, that is, the voltage across each cell is kept consistent. In the trickle charging stage, the voltage across each cell in the multi-cell is kept consistent, and the current flowing into each cell meets the current requirements expected by the cell in the trickle charging stage. In the constant current charging stage, the voltage across each cell in the multi-cell is kept consistent, and the current flowing into each cell meets the current requirements expected by the cell in the constant current charging stage. In the constant voltage charging stage, the voltage across each cell in the multi-cell is kept consistent, and the voltage across each cell meets the voltage requirements expected by the cell in the constant voltage charging stage.

[0034] It should be noted that the charging process of some batteries may only include a trickle charging stage and a constant current charging stage, and the constant voltage charging stage is omitted, and the embodiments of the present application do not specifically limit this. For example, the battery can be fully charged by using a segmented constant current charging method in the constant current charging stage, and the process will be described in detail later.

[0035] For example, the power supply device mentioned in the embodiment of the present application can be mainly used to control the constant current charging stage of the battery in the device to be charged. In other embodiments, the control functions of the trickle charging stage and the constant voltage charging stage of the battery in the device to be charged can also be completed by the power supply device mentioned in the embodiment of the present application and the additional charging chip in the device to be charged; compared with the constant current charging stage, the charging power accepted by the battery in the trickle charging stage and the constant voltage charging stage is smaller, and the efficiency conversion loss and heat accumulation of the charging chip inside the device to be charged are acceptable. It should be noted that the constant current charging stage or constant current stage mentioned in the embodiment of the present application can refer to a charging mode for controlling the output current of the power supply device, and does not require the output current of the power supply device to remain completely constant. For example, it can be generally referred to that the current peak or average value of the pulsating waveform output by the power supply device remains basically unchanged, or remains basically unchanged for a period of time. For example, in practice, the power supply device usually adopts a segmented constant current method for charging in the constant current charging stage.

[0036] Multi-stage constant current charging may have N constant current stages (N is an integer not less than 2). The multi-stage constant current charging starts the first stage of charging with a predetermined charging current. The N constant current stages of the multi-stage constant current charging are executed sequentially from the first stage to the Nth stage. When the previous constant current stage in the constant current stage turns to the next constant current stage, the current peak value or average value of the pulsating waveform may become smaller; when the battery voltage reaches the charging termination voltage threshold, the previous constant current stage in the constant current stage will turn to the next constant current stage. The current conversion process between two adjacent constant current stages can be gradual, or it can also be a step-like jump change.

[0037] Furthermore, when the output current of the power supply device is pulsating direct current, the constant current mode may refer to a charging mode for controlling the peak value or average value of the pulsating direct current, that is, controlling the peak value of the output current of the power supply device not to exceed the current corresponding to the constant current mode. In addition, when the output current of the power supply device is alternating current, the constant current mode may refer to a charging mode for controlling the peak value of the alternating current.

[0038] Further, it should be noted that the device to be charged used in the embodiments of the present application may refer to a terminal, and the "terminal" may include, but is not limited to, a device configured to receive / send communication signals via a wired line connection (such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (for example, for a cellular network, a wireless local area network (WLAN), a digital television network such as a handheld digital video broadcasting handheld (DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and / or another communication terminal). A terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" and / or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that can combine cellular radio telephones with data processing, fax and data communication capabilities; personal digital assistants (PDAs) that can include radio telephones, pagers, Internet / intranet access, web browsers, notepads, calendars and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radio telephone transceivers. In addition, the device or terminal to be charged used in the embodiments of the present application may also include a mobile power bank that can accept charging from a power supply device to store energy to provide energy for other electronic devices.

[0039] In addition, in an embodiment of the present application, when the voltage of the pulsating waveform output by the power supply providing device is directly loaded onto the battery of the device to be charged to charge the battery, the charging current can be characterized in the form of a pulsating wave (such as a steamed bun wave). It can be understood that the charging current can charge the battery in an intermittent manner, and the cycle of the charging current can change with the frequency of the input alternating current, such as the alternating current grid. For example, the frequency corresponding to the cycle of the charging current is an integer multiple or reciprocal multiple of the grid frequency. Moreover, when the charging current charges the battery in an intermittent manner, the current waveform corresponding to the charging current can be composed of one or a group of pulses synchronized with the grid.

[0040] As an example, in an embodiment of the present application, during the charging process (for example, at least one of the trickle charging stage, the constant current charging stage, and the constant voltage charging stage), the battery can accept pulsating direct current (the direction remains unchanged, and the amplitude changes with time), alternating current (both the direction and the amplitude change with time), or direct current (i.e., constant direct current, the amplitude and direction do not change with time) output by a power supply device.

[0041] At present, since the switching charger can adaptively adjust the output of the switching charger according to the charging needs of the battery, the current conversion circuits are all implemented by the switching charger, and the battery is charged by the switching charger. However, the conversion efficiency of the switching charger is limited by the voltage difference between its input voltage and output voltage. When the voltage difference between the input voltage and the output voltage of the switching charger is large, the conversion efficiency is very low and the heat generation is serious. Especially when high power is required for charging, the energy loss is higher and the heat generation will be more serious. For products with light and thin shapes and high temperature requirements, such as mobile phones, the performance requirements cannot be met. The embodiment of the present application provides a charging device that can improve the heat generation of the device to be charged during the charging process.

[0042] like Figure 1 As shown, the charging device 20 includes a boost circuit 22 and a charging channel 21. The boost circuit 22 can be used to boost the first charging voltage, and the charging channel 21 can be used to charge the battery 30 according to the boosted voltage.

[0043] In addition, the charging device 20 may also include a communication control circuit 23, which can be used to communicate with the power supply providing device 10 to instruct the power supply providing device 10 to adjust the output voltage and / or output current so that the output voltage and / or output current of the boost circuit 22 matches the charging requirements of the battery.

[0044] The conversion efficiency of the boost circuit 22 may be higher than the conversion efficiency of the conversion circuit described above. In other words, the conversion efficiency of the boost circuit 22 is higher than the conversion efficiency of the charging management module. The embodiment of the present application does not specifically limit the form of the boost circuit, as long as its conversion efficiency is greater than the conversion efficiency of the charging management circuit. Optionally, as an implementation method, the boost circuit 22 may be a charge pump. The charge pump is mainly composed of switching devices, and the heat generated by the current flowing through the switching devices is very small, almost equivalent to the current directly passing through the wire, so using a charge pump as the boost circuit 22 can not only achieve a boosting effect, but also generate less heat.

[0045] In the process of charging the battery using a boost circuit, the charging voltage and / or charging current required by the battery can be met by adjusting the output voltage and / or output current of the power supply device, rather than being completely met by the boost circuit. That is to say, part of the boost function of the boost circuit is implemented by the power supply device, and another very small part is implemented by the boost circuit, which can reduce the heat generated by the boost circuit due to voltage conversion.

[0046] In addition, since the conversion efficiency of the boost circuit is higher than that of the charging management module, when charging is performed using a boost circuit (such as a charge pump), the boost circuit generates less heat, thereby further improving the heating phenomenon of the device to be charged.

[0047] The embodiment of the present application does not specifically limit the boosting multiple of the boost circuit 22, and the boosting multiple may be the ratio between the output voltage and the input voltage of the boost circuit. For example, the boosting multiple may be 2:1, 3:1, 3:2, 4:1, etc. The boosting multiple used in the specific charging device may be determined according to the output voltage of the power supply device and the voltage of the battery.

[0048] For example, when the output voltage of the power supply device is approximately half of the battery voltage, a boost circuit with a boost ratio of 2:1 may be used.

[0049] Taking a boost ratio of 2:1 as an example, without considering the conversion efficiency, the ratio of the output current to the input current of the boost circuit is 1:2.

[0050] The battery in the embodiment of the present application may be a battery including multiple battery cells, and the boost circuit may boost the first charging voltage to charge the multiple battery cells.

[0051] In the traditional solution, when charging a battery containing multiple cells, a power supply device that matches the voltage of the battery is generally used for charging. For example, when the voltage of the battery is around 8V, the output voltage of the power supply device needs to be higher than 8V, such as the output voltage of the power supply device must be at least greater than 10V, in order to charge the battery. Therefore, when a battery with a higher voltage needs to be charged, it is necessary to redesign a power supply device that matches it for charging. This method may increase the cost and is not compatible with ordinary power supply devices (such as ordinary power adapters). The technical solution provided in the embodiment of the present application is compatible with ordinary power supply devices with lower output voltages, such as power supply devices with an output voltage of 5V, and the output voltage of the power supply device is boosted by a boost circuit to meet the current charging demand of the battery and charge the battery. Therefore, the solution of the embodiment of the present application solves the problem that ordinary adapters cannot charge batteries with higher battery voltages (batteries with a multi-cell series structure), and can save costs.

[0052] The present application does not specifically limit the type of the power supply device 10. For example, the power supply device 10 may be an adapter, a mobile power bank, a car charger, or a computer.

[0053] The battery mentioned in the embodiments of the present application may be a battery comprising a single cell, for example, the battery comprising a single cell may have a higher voltage, or the battery may be a battery comprising multiple cells, the battery comprising multiple cells has a higher voltage.

[0054] like Figure 2 As shown, the battery 30 in the embodiment of the present invention may include multiple cells (at least two cells) connected in series. The cells connected in series may divide the charging voltage provided by the power supply device 10 during the charging process. Figure 2 The first battery cell 31 a and the second battery cell 31 b shown may be any two battery cells among the multiple battery cells, or may be any two groups of battery cells among the multiple battery cells.

[0055] The battery 30 may be one battery or multiple batteries. In other words, the first battery cell and the second battery cell connected in series in the embodiment of the present application may be packaged into one battery pack to form one battery, or may be packaged into multiple battery packs to form multiple batteries. For example, the battery 30 may be one battery, wherein one battery cell comprises the first battery cell and the second battery cell connected in series. For another example, the battery 30 may be two batteries, wherein one battery cell comprises the first battery cell and the other battery cell comprises the second battery cell.

[0056] The communication control circuit 23 of the embodiment of the present application can be used to communicate with the power supply device 10, and instruct the power supply device 10 to adjust the output voltage and / or output current based on the status information of the battery 30, wherein the battery status information may include at least one of the following information: current power, current voltage, current temperature, charging voltage and charging current.

[0057] In the embodiment of the present application, the first charging voltage may be the output voltage of the power supply device 10. Specifically, the input end of the boost circuit 22 may be electrically connected to the output end of the power supply device 10, and the communication control circuit 23 may be used to instruct the power supply device to adjust the output voltage and / or output current according to the battery status information, so that the output voltage and / or output current of the boost circuit 22 matches the current charging demand of the battery 30.

[0058] Alternatively, the first charging voltage may be obtained by converting the output voltage of the power supply device 10 through other circuits (e.g., a conversion circuit). Specifically, the output end of the power supply device 10 is electrically connected to the input end of the conversion circuit, and the output end of the conversion circuit is electrically connected to the input end of the boost circuit 22, and the boost circuit 22 may be used to boost the output voltage of the conversion circuit. The communication control circuit 23 may be used to adjust the output voltage and / or output current of the power supply device 10 according to the status information of the battery, so that the output voltage and / or output current of the boost circuit 22 matches the current charging demand of the battery 30.

[0059] The output voltage and / or output current of the boost circuit 22 matches the current charging demand of the battery 30, which may mean that the configuration of the output voltage and / or output current of the power supply providing device 10 is boosted by the boost circuit 22 so that the output voltage and / or output current of the charging channel 21 matches the charging voltage and / or charging current currently required by the battery 30 (or, the configuration of the output voltage and / or output current of the power supply providing device 10 is boosted by the boost circuit 22 so that the output voltage and / or output current of the charging channel 21 meets the charging demand of the battery 30 (including the battery 30's demand for charging voltage and / or charging current)).

[0060] It should be understood that in one embodiment of the present disclosure, "the output voltage and / or output current of the charging channel 21 matches the charging voltage and / or charging current currently required by the battery 30" includes: the voltage value and / or current value of the direct current output by the charging channel 21 is equal to the charging voltage value and / or charging current value required by the battery 30 or is within a floating preset range (for example, the voltage value fluctuates by 100 mV to 200 mV, the current value fluctuates by 0.001A to 0.005A, etc.).

[0061] The communication control circuit 23 instructs the power supply device 10 to adjust the output voltage and / or output current, which may mean that the communication control circuit 23 may directly send the battery status information to the power supply device 10, and the power supply device 10 adjusts the output voltage and / or output current according to the battery status information. In this case, the power supply device 10 determines whether to increase or decrease its output voltage by itself.

[0062] Alternatively, the communication control circuit 23 instructs the power supply device 10 to adjust the output voltage and / or output current, which may mean that the communication control circuit 23 sends adjustment information to the power supply device 10 according to the status information of the battery to instruct the power supply device 10 to increase or decrease the output voltage and / or output current. The power supply device 10 can directly adjust the output voltage and / or output current according to the adjustment information. In this way, the power supply device 10 does not need to go through multiple feedbacks and confirmations, and can adjust the output voltage of the power supply device to the required voltage through one feedback, thereby saving the loop response time.

[0063] Adjusting the output voltage and / or output current of the power supply device 10 according to the battery status information may mean determining the charging voltage and / or charging current currently required by the battery 30 according to the battery status information, and then adjusting the output voltage and / or charging current of the power supply device 10 according to the charging voltage and / or charging current currently required by the battery 30.

[0064] The embodiment of the present application does not specifically limit the method of determining the charging current currently required by the battery according to the battery status information. For the convenience of description, the charging current currently required by the battery is referred to as the target charging current below.

[0065] As an example, the correspondence between the battery status information and the target charging current, or the charging curve, can be set in advance, and the communication control circuit 23 can obtain the correspondence. During the charging process, the communication control circuit 23 can find the corresponding target charging current based on the current status information of the battery. For example, when the battery 30 is charged to a certain charging stage, the communication control circuit 23 can obtain the target charging current corresponding to the charging stage based on the correspondence, and adjust the output current of the power supply device 10 so that the charging channel uses the target charging current to charge the battery 30. This method of setting the correspondence between the battery status information and the target charging current in advance can simplify the adjustment process.

[0066] As another example, the communication control circuit 23 can obtain the status information of the battery 30 in real time during the charging process, and then determine the target charging current based on the acquired battery status information. In this case, the communication control circuit 23 is required to have the ability to determine the target charging current. This adjustment method is more flexible. The communication control circuit can flexibly adjust the charging voltage and / or charging current according to the charging status of the battery at any time, and the adjustment of the charging voltage and / or charging current of the battery during the charging process is more accurate.

[0067] The correspondence between the battery status information and the target charging current may refer to the correspondence between the current voltage and / or current charge of the battery and the target charging current. When the voltage and / or charge of the battery are different, the charging current required by the battery may be different. For example, when the voltage and / or charge of the battery is small, the charging current required by the battery may be relatively large. At this time, a larger target charging current can be set; when the voltage and / or charge of the battery is large, such as when the battery is almost fully charged, the charging current required by the battery may be small. At this time, a smaller target charging current can be set. Alternatively, the correspondence between the battery status information and the target charging current may also refer to the correspondence between the current temperature of the battery and the charging current. Different target charging currents can be set according to the temperature of different batteries. For example, when the temperature of the battery is low, a larger target charging current can be set to increase the charging speed; when the temperature of the battery is high, a smaller target charging current can be set to control the heating during the charging process. Alternatively, the correspondence between the battery status information and the target charging current may refer to the correspondence between the current charging voltage and / or charging current of the battery and the target charging current. Specifically, the charging process of the battery may include multiple charging stages, each of which may be charged using a different charging current, and after the current charging stage is completed, the next charging stage is entered. Therefore, the charging current of the next charging stage may be determined based on the charging current of the current charging stage, and the charging current of the next charging stage is the target charging current.

[0068] Of course, the correspondence between the battery status information and the target charging current may also refer to a combination of any of the methods described above, and the embodiment of the present application does not specifically limit this.

[0069] The embodiment of the present application does not specifically limit the manner of adjusting the output voltage and / or output current of the power supply device 10 according to the target charging current.

[0070] As an example, the communication control circuit 23 can determine whether the power supply device 10 increases or decreases the output current according to the target charging current and the current charging current of the battery. When the target charging current is greater than the current charging current of the battery, the communication control circuit 23 can instruct the power supply device 10 to increase the output current. When the target charging current is less than the current charging current of the battery, the communication control circuit 23 can instruct the power supply device 10 to reduce the output current.

[0071] As another example, the communication control circuit 23 can directly send the target charging current to the power supply device 10, and the power supply device 10 can compare the target charging current with its output current to determine whether to increase or decrease the output current. For example, when the boost circuit is a boost circuit with a boost multiple of 2:1, that is, the output current of the boost circuit is half of the input current, the boost circuit can convert the output current I of the power supply device 10 into I / 2 to charge the battery. At this time, the power supply device 10 can compare one times the target charging current with its output current. When it is determined that the output current of the power supply device 10 is greater than one times the target charging current, the power supply device 10 can reduce the output current. When it is determined that the output current of the power supply device 10 is less than one times the target charging current, the power supply device 10 can increase the output current.

[0072] Optionally, the output current of the power supply device 10 can be set to multiple gears. When the difference between the output current of the power supply device 10 and the target charging current is large, the communication control circuit 23 can adjust the gear of the output current of the power supply device 10 by multiple grids, and the voltage of each grid can be set to a fixed value, for example, 5mA, 10mA, etc.; when the difference between the output current of the power supply device 10 and the target charging current is small, the communication control circuit 23 can adjust the gear of the output current of the power supply device 10 by one grid.

[0073] The embodiment of the present application does not specifically limit the communication sequence between the communication control circuit 23 and the power supply device 10. For example, the communication control circuit 23 may actively initiate communication to instruct the power supply device 10 to adjust the output voltage and / or output current. Alternatively, the power supply device 10 may actively initiate communication to inquire the communication control circuit 23 whether it is necessary to adjust the output voltage and / or output current of the power supply device 10. When it is necessary to adjust the output voltage and / or output current of the power supply device 10, the communication control circuit 23 may provide feedback to the inquiry of the power supply device 10 to instruct the power supply device 10 to adjust its output voltage and / or output current.

[0074] The communication control circuit 23 can detect or monitor the status information of the battery in real time. The communication control circuit 23 can detect or monitor the status information of the battery 30 in a variety of ways, such as detecting the status information of the battery through a detection circuit, or detecting the status information of the battery 30 through other methods, which is not limited in the embodiments of the present application.

[0075] The control function in the communication control circuit 23 may be implemented, for example, by a micro control unit (MCU), or by an application processor (AP) inside the device to be charged, or by cooperation between the MCU and the AP.

[0076] Taking the constant current charging of the dual-cell battery as an example, as a specific implementation method, the battery can be charged in a segmented constant current manner, that is, multiple constant current charging stages can be set, and different constant current charging stages correspond to different charging currents. The boost circuit 22 can be a boost circuit with a boost multiple of 2:1. Without considering the voltage conversion efficiency and path loss, when the charging current required by the battery is I1, the output current of the power supply device 10 needs to be adjusted to 2*I1, and when the charging current required by the battery is I2, the output current of the power supply device needs to be adjusted to 2*I2.

[0077] The constant current charging stage of the battery 30 includes n charging stages, and n charging currents [I1, I2, I3, ..., In] are set for the multiple charging stages, n≥1, wherein I1≥I2≥I3...≥In. Optionally, a charging cut-off voltage can also be set for each charging stage, and the charging cut-off voltages of different charging stages can be the same or different. For example, the charging cut-off voltages of the n charging stages can be set to different charging cut-off voltages according to the charging current corresponding to the charging stage. For example, when the charging current of the charging stage is large, a smaller charging cut-off voltage can be set, and when the charging current of the charging stage is small, a larger charging cut-off voltage can be set. For another example, the charging cut-off voltages of the n charging stages can all be the same and be a limiting voltage Vn higher than the standard cut-off voltage. The limiting voltage Vn is related to the battery system, the materials used, etc. In some embodiments, if the standard cut-off voltage of the battery is V0, Vn can be set to V0+△V, for example, △V can be between 0.05V and 0.1V. The values ​​of the charging currents I1, I2, ..., In are also related to the battery system, the materials used, etc. For example, In may be 700 mA.

[0078] In the first charging stage, the communication control circuit 23 can communicate with the power supply device 10 to instruct the power supply device 10 to adjust its output voltage to I1 / 2 to ensure that the charging voltage of the input battery is I1. In addition, the communication control circuit 23 can also monitor the voltage of the battery 30 in real time. When it is detected that the battery 30 is charged to the first charging cut-off voltage, it indicates that the charging process of the battery 30 needs to enter the next charging stage. At this time, the charging current of the battery 30 needs to be adjusted to the charging current I2 corresponding to the second charging stage. When the communication control circuit 23 detects that the voltage of the battery 30 reaches the first charging cut-off voltage, it can communicate with the power supply device 10 to instruct the power supply device 10 to reduce the output current so that the output current of the power supply device 10 is adjusted to I2 / 2 until the voltage of the battery 30 reaches the second charging cut-off voltage. Repeat the above steps until the charging current In of the last step is used to charge to the nth charging cut-off voltage.

[0079] The output current of the power supply device 10 described above is I1 / 2, which does not mean that the output current of the power supply device 10 is constant. For example, it may generally refer to that the current peak value or average value of the pulsating waveform output by the power supply device 10 remains basically unchanged, or it may mean that the output current of the power supply device 10 is around I1 / 2. For example, the output current of the power supply device may be (1+2%)I1 / 2.

[0080] Combine the following Figure 3 , the charging process of the embodiment of the present application is described. Figure 3 The charge pump shown is a schematic diagram of a 2x boost charge pump. During the operation of the charge pump, the voltage conversion can be achieved in two stages. In the first stage, switches S1 and S2 are closed, and switches S3 and S4 are opened, and the capacitor is charged to a value equal to the input voltage. In the second stage, switches S3 and S4 are closed, and switches S1 and S2 are opened. Because the voltage drop across the capacitor cannot change immediately, the output voltage jumps to twice the input voltage value. In this way, voltage doubling can be achieved.

[0081] The input voltage of the charge pump is Vin, the input current is Iin, the output voltage is Vout, and the output current is Iout. The input end of the charge pump can be electrically connected to the output end of the power supply device, and the output end of the charge pump can be electrically connected to the battery. Figure 3 The battery shown includes a dual cell. The controller can continuously monitor the charging state of the battery and report the charging state of the battery to the power supply device, and the power supply device adjusts its output voltage and / or output current according to the charging state of the battery.

[0082] Understandably, Figure 3The controller in may be the communication control circuit in the embodiment of the present application.

[0083] Figure 3 For the charge pump shown, without considering the conversion efficiency, Vout = 2*Vin, Iout = Iin / 2. When charging the battery with a constant current, if the desired charging current of the battery is Im, the output constant current point of the power supply device can be set to Iin = Im / 2, so that after the charge pump voltage is doubled, the output current of the charge pump can be Iout = Im, which can meet the battery's demand for charging current.

[0084] The constant current charging stage of the battery is usually charged in a segmented constant current manner. The battery has different charging current requirements in different charging stages. Taking the battery including n charging stages as an example, the charging currents from the first charging stage to the nth charging stage are Im1, Im2, ..., Imn. Among them, Im1≥Im2≥Im3...≥Imn. In the first charging stage, if the charging current entering the battery is the constant current Im1, the output constant current point of the power supply device can be set to Iin=Im1 / 2. When the controller detects that the battery is charged to the voltage specified in the first stage, the charging current entering the battery can be controlled to Im2. At this time, the controller can inform the power supply device to reduce the output current and adjust the output constant current point of the power supply device to Iin=Im2 / 2, and so on. The controller can continuously set the constant current point of the power supply device to adjust the constant current entering the battery until the battery is fully charged.

[0085] The charging device 20 provided in the embodiment of the present application may further include a charging management circuit 24, such as Figure 4 As shown, the charging management circuit 24 can be used to manage the output voltage of the boost circuit 22 , wherein the voltage difference between the input voltage and the output voltage of the charging management circuit 24 is smaller than the input voltage of the boost circuit 22 and the output voltage of the charging management circuit 24 .

[0086] According to the technical solution provided in the embodiment of the present application, the boost circuit 22 can share the function of the charging management circuit 24 in boosting the output voltage of the power supply device 10. Compared with the traditional technology that only uses the charging management circuit for charging, the voltage difference between the input voltage and the output voltage of the charging management circuit 24 can be reduced, thereby reducing the heat generation of the charging management circuit 24.

[0087] Optionally, the conversion efficiency of the boost circuit 22 is higher than the conversion efficiency of the charging management circuit 24. The charging management circuit 24 may be an inductor-based charging management circuit, which may use an inductive buck circuit to buck, or use an inductive boost circuit to boost. The boost circuit 22 may use a capacitive boost circuit (such as a charge pump) to boost, or the boost circuit may use a boost circuit combining an inductive boost circuit and a capacitive boost circuit to boost.

[0088] The charging management circuit 24 can be used to perform constant voltage and / or constant current control on the output voltage of the boost circuit 22 to obtain the expected charging voltage and / or charging current of the battery. Specifically, the input end of the charging management circuit 24 can be electrically connected to the output end of the boost circuit 22, and the output end of the charging management circuit 24 is electrically connected to the battery. The charging management circuit 24 can receive the output voltage and / or output current of the boost circuit 22, and convert the output voltage and / or output current of the boost circuit 22 into the charging voltage and / or charging current currently required by the battery 30, so as to charge the battery 30.

[0089] The charging management circuit 24 may be a charging management circuit with a boost function, or may be a charging management circuit with a buck function. For example, the charging management circuit may boost the output voltage of the boost circuit and then charge the battery 30. Alternatively, the charging management circuit 24 may buck the output voltage of the boost circuit and then charge the battery.

[0090] Whether the charging management circuit 24 uses the boost or buck function can be determined based on the output voltage of the boost circuit 22 and the voltage of the battery 30. When the output voltage of the boost circuit 22 is higher than the voltage of the battery 30, the charging management circuit 24 can use the buck function to buck the output voltage of the boost circuit 22. When the output voltage of the boost circuit 22 is lower than the voltage of the battery 30, the charging management circuit 24 can use the boost function to boost the output voltage of the boost circuit 22.

[0091] Optionally, the communication control circuit 23 may also communicate with the power supply device 10 to instruct the power supply device 10 to adjust its output voltage and / or output current to adjust the voltage difference between the input voltage and the output voltage of the charging management circuit 24 .

[0092] The communication control circuit 23 can also communicate with the power supply device 10 based on the voltage difference between the input voltage and the output voltage of the charging management circuit 24, and instruct the power supply device 10 to adjust its output voltage to reduce the voltage difference between the input voltage and the output voltage of the charging management circuit 24.

[0093] The conversion efficiency of the charging management circuit 24 is positively correlated with the voltage difference between its input and output terminals. Therefore, reducing the voltage difference between the input voltage and the output voltage of the charging management circuit 24 can further reduce the heat generated at the charging management circuit 24, thereby further reducing the heat generated by the device to be charged.

[0094] The power supply device 10 adjusting its output voltage may include: the power supply device 10 adjusting its output voltage so that the voltage difference between the input voltage and the output voltage of the charging management circuit 24 is within a preset range.

[0095] The communication control circuit 23 can detect or monitor in real time the voltage difference between the input voltage and the output voltage of the charging management circuit 24. There are many ways for the communication control circuit 23 to detect or monitor the voltage difference between the input voltage and the output voltage in real time, for example, the voltage difference can be detected by a voltage detection circuit, or by other methods, which is not limited in the embodiments of the present application.

[0096] The control function in the communication control circuit 23 may be implemented, for example, by an MCU, or may be implemented by an AP inside the device to be charged, or may be implemented by cooperation between the MCU and the AP.

[0097] The embodiment of the present application does not specifically limit the communication sequence between the communication control circuit 23 and the power supply device 10. For example, the communication control circuit 23 may actively initiate communication to instruct the power supply device 10 to adjust the output voltage and / or output current to reduce the voltage difference between the input voltage and the output voltage of the charging management circuit 24. Alternatively, the power supply device 10 may actively initiate communication to inquire the communication control circuit 23 whether it is necessary to reduce the voltage difference between the input voltage and the output voltage of the charging management circuit 24. When the voltage difference needs to be reduced, the communication control circuit 23 may provide feedback to the inquiry of the power supply device 10 to instruct the power supply device 10 to reduce the voltage difference between the input voltage and the output voltage of the charging management circuit 24.

[0098] In the embodiment of the present application, a preset range of voltage difference can be pre-set, and within the preset range, the conversion efficiency of the charging management circuit is high. The power supply device 10 adjusts its output voltage so that the voltage difference between the input voltage and the output voltage of the charging management circuit 24 is within the preset range, which is conducive to improving the conversion efficiency of the charging management circuit 24 and reducing the heating of the charging management circuit.

[0099] The preset range may be a range in which the conversion efficiency of the charging management circuit 24 is relatively high. For example, when the voltage difference is between 0 and 500 mV, the conversion efficiency of the charging management circuit 24 is relatively high, and therefore, the preset range may be set to 0 to 500 mV.

[0100] The communication control circuit 23 can detect the voltage difference between the input voltage and the output voltage of the charging management circuit 24. When the voltage difference is not within the preset range, the power supply device 10 can be instructed to adjust the output voltage to reduce the voltage difference between the input voltage and the output voltage of the charging management circuit 24. In this way, it can be ensured that the charging management circuit 24 always works at a higher efficiency, so that the heating of the charging management circuit 24 can be controlled, and further, the heating of the device to be charged can be reduced.

[0101] As an embodiment, taking the charging of a dual-cell battery by a power supply device 10 with an output voltage of 5V as an example, the boost circuit 22 can adopt a boost circuit with a boost multiple of 2:1. The communication control circuit 23 can communicate with the charging management circuit 24 and know that in the current charging state, its efficiency is higher when its input voltage is set to the minimum. For example, when the output voltage of the charging management circuit 24 is V1, its conversion efficiency is higher when its input voltage is between V1 and V1±500mV. Since the boost circuit 22 has a boost multiple of 2:1, the conversion efficiency of the charging management circuit 24 is higher when the input voltage of the boost circuit 22 is between (V1~V1±500mV) / 2. Therefore, the communication control circuit 23 can communicate with the power supply device 10 and instruct the power supply device 10 to adjust its output voltage so that the output voltage of the power supply device 10 is within the range of (V1~V1±500mV) / 2. In this way, the charging management circuit 24 can obtain its desired input voltage, and can ensure that the voltage difference between the input voltage and the output voltage of the charging management circuit 24 is between 0 and 500mV, thereby improving the conversion efficiency of the charging management circuit 24.

[0102] During the charging process, the communication control circuit 23 can communicate with the power supply device 10 and the charging management circuit 24 in different ways, so that the charging management circuit 24 is always at a higher conversion efficiency point. In this way, the conversion efficiency of the charging device 20 will be higher, which can reduce the heat generated during the charging process.

[0103] Combine the following Figure 5 , the charging device provided in an embodiment of the present application is described. Figure 5 The charge pump shown is a schematic diagram of a 2x boost charge pump. The input voltage of the charge pump is Vin, the input current is Iin, the output voltage is Vout, and the output current is Iout. The input end of the charge pump can be electrically connected to the output end of the power supply device, and the output end of the charge pump can be electrically connected to the input end of the charging management circuit. The output end of the charging management circuit can be electrically connected to the battery. Figure 5 The battery shown includes dual cells.

[0104] The charging management circuit can be used to perform constant voltage and / or constant current control on the output voltage and output current of the charge pump, so that the output voltage and output current of the charging management circuit match the charging voltage and charging current required by the battery.

[0105] According to the working principle of the charge pump, without considering the conversion efficiency, Vout = 2*Vin, Iout = Iin / 2.

[0106] The charge pump can share part of the boost function, which can reduce the boost demand of the charging device on the charging management circuit, thereby reducing the heat generated by the charging management circuit. In addition, since the conversion efficiency of the charge pump is higher than that of the charging management circuit, the heat generated by the charge pump is less than that of the charging management circuit for the same voltage increase. Therefore, introducing a charge pump in the charging device can reduce the heat generated by the charging device.

[0107] The following is an explanation with specific examples. For ordinary power supply equipment, its output voltage is generally around 5V, and the voltage of a dual-cell battery is generally above 8V. If you want to use an ordinary power supply equipment to charge a dual-cell, you usually need to use a voltage greater than 10V to charge the dual-cell. Assuming that the charging voltage of the dual-cell is 11V, if the charging device only uses a charging management circuit for boosting, the charging management circuit needs to increase the output voltage of the power supply equipment by 6V, and the voltage difference between the input voltage and the output voltage of the charging management circuit is 6V. If the charging device uses a 2x boost charge pump and a charging management circuit for boosting, the charge pump can bear the 5V boost voltage difference, and the charging management circuit only needs to increase the output voltage of the charge pump by 1V to meet the battery charging needs.

[0108] After adding the charge pump, the voltage difference between the input voltage and the output voltage of the charging management circuit is significantly reduced, and the conversion efficiency of the charging management circuit is related to its voltage difference. Therefore, after the voltage difference is reduced, the heat generation of the charging management circuit is also improved.

[0109] In addition, since the conversion efficiency of the charge pump is higher than that of the charging management circuit, the heat generated by the charging management circuit when increasing the voltage by 5V is higher than the heat generated by the charge pump when increasing the voltage by 5V. Therefore, after adding a charge pump to the charging device, the heat generated by the charge pump and the charging management circuit when increasing the voltage by 6V is also smaller than the heat generated by the charging management circuit when increasing the voltage by 6V. Therefore, the heat generation of the charging device can be reduced.

[0110] In addition, since the conversion efficiency of the charging management circuit is related to the voltage difference between its input voltage and output voltage, the conversion efficiency is high when the voltage difference between the input voltage and output voltage of the charging management circuit is within a certain range. During the charging process, we hope that the conversion efficiency of the charging management circuit is as high as possible, so as to reduce heat generation.

[0111] Therefore, a controller can be used in the charging device to control the voltage difference between the input voltage and the output voltage of the charging management circuit, so that the conversion efficiency of the charging management circuit is higher. The controller can be the communication control device described in the embodiment of the present application.

[0112] During the charging process, the controller can communicate with the charging management circuit to obtain the status information of the charging management circuit, which may include the output voltage of the charging management circuit and / or the voltage difference between the input voltage and the output voltage. The controller can adjust the output voltage and / or output current of the power supply device according to the status information of the charging management circuit, and then adjust the input voltage of the power supply device, so that the voltage difference between the input voltage and the output voltage of the charging management circuit is controlled within a reasonable range.

[0113] Optionally, the controller may know in advance that when the voltage difference between the input voltage and the output voltage of the charging management circuit is within the first preset range, its conversion efficiency is better. After obtaining the current output voltage of the charging management circuit, the controller may determine, based on the first preset range, how much the input voltage of the charging management circuit is set to when its conversion efficiency is better. Assuming that the controller determines that the input voltage of the charging management circuit is better within the first range, further, the controller may control the power supply device to adjust its output voltage and / or output current based on the determined input voltage of the charging management circuit, so that the input voltage of the charging management circuit is within the first range.

[0114] If the controller determines that the input voltage of the charging management circuit is Vm, its conversion efficiency is relatively high. Due to the existence of the 2x boost charge pump, without considering the path loss, the controller can control the output voltage of the power supply device to be Vm / 2. In this way, the charging management circuit can obtain the desired input voltage, making the conversion efficiency of the charging management circuit relatively high.

[0115] In the case where the controller obtains the voltage difference between the input voltage and the output voltage of the charging management circuit, the controller can compare the actual voltage difference of the charging management circuit with the first preset range. If the actual voltage difference is greater than the first preset range and the input voltage is lower than the output voltage, the power supply device can be controlled to increase its output voltage. If the actual voltage difference is greater than the first preset range and the input voltage is higher than the output voltage, the power supply device can be controlled to reduce its output voltage. If the actual voltage is within the first preset range, the output voltage of the power supply device can be adjusted first.

[0116] The controller can continuously communicate with the charging management circuit and the power supply device during the entire charging cycle, so that the charging management circuit is always in a state of high conversion efficiency. In this way, the efficiency of the charging system can always be in a better state, ensuring charging efficiency and reducing heat.

[0117] The above description is based on the electrical connection between the input end of the charging management circuit 24 and the output end of the boost circuit 22, but the embodiments of the present application are not limited thereto. For example, the charging management circuit 24 may be provided before the boost circuit 22, that is, the input end of the charging management circuit 24 may be electrically connected to the output end of the power supply device 10, and the output end of the charging management circuit 24 may be electrically connected to the input end of the boost circuit 22. The charging management circuit 24 may perform constant voltage and / or constant current control on the output voltage and / or output current of the power supply device 10.

[0118] For example, the boosting ratio of the boost circuit 22 is 2:1, and the charging current currently required by the battery 30 is Ix. The charging management circuit 24 can perform constant current control on the output current of the power supply device 10, so that the output current of the charging management circuit 24 is stabilized at Ix / 2. In this way, it can be ensured that the output current of the charging management circuit 24 can output a stable current Ix after being boosted by the boost circuit 22 to meet the current charging demand of the battery 30.

[0119] like Figure 6 As shown, an embodiment of the present application further provides a device to be charged, which includes a battery and a charging device in any one of the implementations described above.

[0120] Optionally, the battery may include multiple cells.

[0121] Combination of the above Figure 1-Figure 6 , describes in detail the device embodiment of the present application, and the following is combined with Figure 7 , the method embodiments of the present application are described in detail. The method embodiments correspond to the device embodiments, so the parts that are not described in detail can be referred to the previous device embodiments.

[0122] Figure 7 is a schematic flow chart of a charging method provided in an embodiment of the present application. The method can be applied to a charging device, for example, the charging device 20 described above. Figure 7 The method includes steps S510-S530.

[0123] S510: Boost the output voltage of the power supply device by using a boost circuit.

[0124] S520: Charge the battery using the charging channel according to the boosted voltage.

[0125] S530: Communicate with a power supply device by using a communication control circuit to instruct the power supply device to adjust an output voltage and / or an output current so that the output voltage and / or the output current of the boost circuit matches a charging requirement of the battery.

[0126] Optionally, instructing the power supply device to adjust the output voltage and / or output current includes: instructing the power supply device to adjust the output voltage and / or output current according to status information of the battery, wherein the status information of the battery includes at least one of the following information: charging voltage, charging current, current charge, current voltage and current temperature.

[0127] Optionally, the input end of the boost circuit is electrically connected to the output end of the power supply providing device, and the output end of the boost circuit is electrically connected to the battery. The power supply providing device adjusts the output voltage and / or output current so that the output voltage and / or output current of the boost circuit matches the charging voltage and / or charging current required by the battery.

[0128] Optionally, instructing the power supply device to adjust the output voltage and / or output current based on the status information of the battery includes: determining a target charging current based on the status information of the battery; and instructing the power supply device to adjust the output voltage and / or output current based on the target charging current.

[0129] Optionally, instructing the power supply device to adjust the output voltage and / or output current based on the target charging current includes: sending adjustment information to the power supply device based on the difference between the target charging current and the output current of the power supply device to instruct the power supply device to adjust the output voltage and / or output current.

[0130] Optionally, the charging method further includes: managing the output voltage of the boost circuit using a charging management circuit, wherein the voltage difference between the input voltage and the output voltage of the charging management circuit is smaller than the voltage difference between the input voltage of the boost circuit and the output voltage of the charging management circuit.

[0131] Optionally, the charging method further includes: communicating with the power supply device using a communication control circuit to instruct the power supply device to adjust the output voltage of the power supply device to adjust the voltage difference between the input voltage and the output voltage of the charging management circuit.

[0132] Optionally, utilizing the communication control circuit to communicate with the power supply device to instruct the power supply device to adjust the output voltage of the power supply device includes: utilizing the communication control circuit to communicate with the power supply device based on the voltage difference between the input voltage and the output voltage of the charging management circuit to instruct the power supply device to adjust the output voltage of the power supply device to reduce the voltage difference between the input voltage and the output voltage of the charging management circuit.

[0133] Optionally, the power supply device adjusts the output voltage of the power supply device, including: the power supply device adjusts the output voltage of the power supply device so that the voltage difference between the input voltage and the output voltage of the charging management circuit is within a preset range.

[0134] Optionally, the conversion efficiency of the boost circuit is higher than the conversion efficiency of the charging management circuit.

[0135] Optionally, the boost circuit is a charge pump.

[0136] Optionally, the charging stage of the battery is a constant current charging stage.

[0137] Optionally, the battery includes multiple battery cells.

[0138] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0139] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0140] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0141] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0142] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0143] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A charging device, characterized in that: include: A boost circuit, used for boosting the output voltage of a power supply device; A charging channel, used to charge the battery according to the boosted voltage; a communication control circuit, configured to communicate with a power supply device to instruct the power supply device to adjust an output voltage and / or an output current so that the output voltage and / or the output current of the boost circuit meets a charging requirement of the battery; Wherein, the charging device also includes a charging management circuit for managing the output voltage of the boost circuit, wherein the voltage difference between the input voltage and the output voltage of the charging management circuit is smaller than the voltage difference between the input voltage of the boost circuit and the output voltage of the charging management circuit, wherein the charging management circuit is used to perform constant voltage and / or constant current control on the output voltage of the boost circuit.

2. The charging device according to claim 1, characterized in that: The instructing the power supply device to adjust the output voltage and / or the output current includes: According to the battery status information, instruct the power supply device to adjust the output voltage and / or output current, wherein the battery status information includes at least one of the following information: charging voltage, charging current, current power, current voltage and current temperature.

3. The charging device according to claim 2, characterized in that: The input end of the boost circuit is electrically connected to the output end of the power supply device, and the output end of the boost circuit is electrically connected to the battery. The power supply device adjusts the output voltage and / or output current so that the output voltage and / or output current of the boost circuit matches the charging voltage and / or charging current required by the battery.

4. The charging device according to claim 2, characterized in that: The step of instructing a power supply device to adjust an output voltage and / or an output current according to the battery status information includes: Determining a target charging current according to the battery status information; According to the target charging current, the power supply device is instructed to adjust the output voltage and / or the output current.

5. The charging device according to claim 4, characterized in that: The instructing the power supply device to adjust the output voltage and / or output current according to the target charging current includes: According to the difference between the target charging current and the output current of the power supply device, adjustment information is sent to the power supply device to instruct the power supply device to adjust the output voltage and / or the output current.

6. The charging device according to claim 1, characterized in that: The communication control circuit is further used to instruct the power supply device to adjust the output voltage of the power supply device so as to adjust the voltage difference between the input voltage and the output voltage of the charging management circuit.

7. The charging device according to claim 6, characterized in that: The communication control circuit is used to communicate with the power supply device according to the voltage difference between the input voltage and the output voltage of the charging management circuit, and instruct the power supply device to adjust the output voltage of the power supply device to reduce the voltage difference between the input voltage and the output voltage of the charging management circuit.

8. The charging device according to claim 6 or 7, characterized in that: The power supply device adjusts the output voltage of the power supply device, including: The power supply device adjusts the output voltage of the power supply device so that the voltage difference between the input voltage and the output voltage of the charging management circuit is within a preset range.

9. The charging device according to any one of claims 6 to 7, characterized in that: The conversion efficiency of the boost circuit is higher than the conversion efficiency of the charging management circuit.

10. The charging device according to any one of claims 1 to 7, characterized in that: The voltage boost circuit is a charge pump.

11. The charging device according to any one of claims 1 to 7, characterized in that: The charging stage of the battery is a constant current charging stage.

12. The charging device according to any one of claims 1 to 7, characterized in that: The battery includes a plurality of battery cells.

13. A device to be charged, characterized in that: include: Battery; A charging device as claimed in any one of claims 1 to 12.

14. A charging method, characterized in that: include: Boosting the output voltage of the power supply device using a boost circuit; Using the charging channel to charge the battery according to the boosted voltage; Communicating with a power supply device using a communication control circuit to instruct the power supply device to adjust an output voltage and / or an output current so that the output voltage and / or the output current of the boost circuit meets a charging requirement of the battery; The charging method further comprises: The output voltage of the boost circuit is managed by a charging management circuit, wherein the voltage difference between the input voltage and the output voltage of the charging management circuit is smaller than the voltage difference between the input voltage of the boost circuit and the output voltage of the charging management circuit.

15. The charging method according to claim 14, characterized in that: The instructing the power supply device to adjust the output voltage and / or output current comprises: According to the battery status information, instruct the power supply device to adjust the output voltage and / or output current, wherein the battery status information includes at least one of the following information: charging voltage, charging current, current power, current voltage and current temperature.

16. The charging method according to claim 15, characterized in that: The input end of the boost circuit is electrically connected to the output end of the power supply device, and the output end of the boost circuit is electrically connected to the battery. The power supply device adjusts the output voltage and / or output current so that the output voltage and / or output current of the boost circuit matches the charging voltage and / or charging current required by the battery.

17. The charging method according to claim 15, characterized in that: The step of instructing a power supply device to adjust an output voltage and / or an output current according to the battery status information includes: Determining a target charging current according to the battery status information; According to the target charging current, the power supply device is instructed to adjust the output voltage and / or the output current.

18. The charging method according to claim 17, characterized in that: The instructing the power supply device to adjust the output voltage and / or output current according to the target charging current includes: According to the difference between the target charging current and the output current of the power supply device, adjustment information is sent to the power supply device to instruct the power supply device to adjust the output voltage and / or the output current.

19. The charging method according to claim 14, characterized in that: The charging method further comprises: The communication control circuit is used to communicate with the power supply device to instruct the power supply device to adjust the output voltage of the power supply device so as to adjust the voltage difference between the input voltage and the output voltage of the charging management circuit.

20. The charging method according to claim 19, characterized in that: The communicating with the power supply device by using the communication control circuit to instruct the power supply device to adjust the output voltage of the power supply device comprises: The communication control circuit is used to communicate with the power supply device according to the voltage difference between the input voltage and the output voltage of the charging management circuit, and instruct the power supply device to adjust the output voltage of the power supply device to reduce the voltage difference between the input voltage and the output voltage of the charging management circuit.

21. The charging method according to claim 19 or 20, characterized in that: The power supply device adjusts the output voltage of the power supply device, including: The power supply device adjusts the output voltage of the power supply device so that the voltage difference between the input voltage and the output voltage of the charging management circuit is within a preset range.

22. The charging method according to any one of claims 19-20, characterized in that: The conversion efficiency of the boost circuit is higher than the conversion efficiency of the charging management circuit.

23. The charging method according to any one of claims 14 to 20, characterized in that: The voltage boost circuit is a charge pump.

24. The charging method according to any one of claims 14 to 20, characterized in that: The charging stage of the battery is a constant current charging stage.

25. The charging method according to any one of claims 14 to 20, characterized in that: The battery includes a plurality of battery cells.

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