Discharging circuit, charging circuit, charging and discharging circuit and terminal equipment

Abstract

The invention discloses a discharging circuit, a charging circuit, a charging and discharging circuit and terminal equipment, the discharging circuit comprises a plurality of energy storage modules, a plurality of output switch modules and a main control module, and the output end of one energy storage module is connected with the output end of the discharging circuit through one output switch module; the main control module is connected with each energy storage module and each output switch module, and the main control module is used for controlling the on and off of each output switch module according to the voltage of the output end of each energy storage module. Under the condition that the main control module obtains the voltage of the output end of each energy storage module, the main control module can independently control the output of each energy storage module according to the voltage of the output end of each energy storage module, and when the energy storage module is a detachable battery, the compatibility with the battery can be improved.

Description

Technical Field

[0001] The present application belongs to the field of power supply technology, and in particular relates to a discharge circuit, a charging circuit, a charge-discharge circuit and a terminal device. Background Art

[0002] Currently, most portable products usually have two power supply modes, one is built-in battery power supply, and the other is detachable battery power supply.

[0003] Built-in battery power supply can reduce product size and design difficulty, but the built-in battery needs to be charged after it runs out of power. Removable battery power supply can replace the battery at any time, but there are strict restrictions on the batteries that can be replaced. Summary of the invention

[0004] The purpose of the present application is to provide a discharge circuit, a charging circuit, a charge-discharge circuit and a terminal device, aiming to solve the problem that traditional portable devices have strict requirements on removable batteries.

[0005] A first aspect of an embodiment of the present application provides a discharge circuit, comprising: a plurality of energy storage modules; a plurality of output switch modules, wherein the output end of one of the energy storage modules is connected to the output end of the discharge circuit via one of the output switch modules; a main control module, wherein the main control module is respectively connected to each of the energy storage modules, and the main control module is used to obtain the voltage at the output end of each of the energy storage modules; the main control module is also respectively connected to each of the output switch modules, and is used to control the conduction and disconnection of each of the output switch modules according to the voltage at the output end of each of the energy storage modules.

[0006] In one embodiment, the main control module determines the power of each energy storage module based on the voltage of the output end of each energy storage module obtained; the main control module is used to control the output switch module corresponding to the energy storage module with the highest power to turn on when the power difference between the energy storage module with the highest power and the energy storage module with the second highest power is greater than a preset threshold.

[0007] In one embodiment, the main control module is used to control the energy storage module with the highest power and each of the output switch modules corresponding to each of the energy storage modules whose power difference with the energy storage module with the highest power is not greater than the preset threshold to be turned on when the power difference between the energy storage module with the highest power and the energy storage module with the second highest power is not greater than the preset threshold.

[0008] In one embodiment, the energy storage module includes a battery and a battery compartment for installing the battery, and the battery is connected to the corresponding output switch module and the main control module through the battery compartment.

[0009] In one embodiment, the output switch module includes a first switch device Q1, a second switch device Q2, a third switch device Q3, a fourth switch device Q4, a first bias resistor R7 and a second bias resistor R8; the first end of the first switch device Q1 is connected to the output end of the corresponding energy storage module, the second end of the first switch device Q1 is connected to the second end of the second switch device Q2, the control end of the first switch device Q1 is connected to the second end of the third switch device Q3, the first end of the third switch device Q3 is grounded, the control end of the third switch device Q3 is connected to the main control module, and the first bias resistor R7 is connected to the output end of the corresponding energy storage module. The first end of the first bias resistor R7 is connected to the first end of the first switch device Q1, and the second end of the first bias resistor R7 is connected to the control end of the first switch device Q1; the first end of the second switch device Q2 is connected to the output end of the discharge circuit, the control end of the second switch device Q2 is connected to the second end of the fourth switch device Q4, the second end of the fourth switch device Q4 is grounded, and the control end of the fourth switch device Q4 is connected to the main control module, the first end of the second bias resistor R8 is connected to the first end of the second switch device Q2, and the second end of the second bias resistor R8 is connected to the control end of the second switch device Q2.

[0010] A second aspect of an embodiment of the present application provides a charging circuit, comprising a plurality of energy storage modules; a charging module, the charging module being connected to each of the energy storage modules, the charging module being used to provide a charging voltage to each of the energy storage modules based on the electric energy provided by an external power supply; and a main control module, the main control module being connected to each of the energy storage modules and the charging module, respectively, the main control module being used to obtain a voltage at an output end of each of the energy storage modules, and adjusting the charging voltage provided to each of the energy storage modules according to the voltage at the output end of each of the energy storage modules.

[0011] In one embodiment, the charging module includes multiple voltage regulating units, the first end of each of the voltage regulating units is used to connect to the external power supply, and the second end of each of the voltage regulating units is connected to at least one of the energy storage modules; the main control module is respectively connected to each of the voltage regulating units, and is used to control the charging voltage output by each of the voltage regulating units according to the voltage at the output end of each of the energy storage modules.

[0012] In one embodiment, it further includes multiple temperature detection modules, each of which is connected to the main control module. The temperature detection module is used to detect the temperature of at least one of the energy storage modules. The main control module is used to control the charging voltage of each of the voltage regulating units according to the voltage at the output end of each of the energy storage modules and the temperature of each of the energy storage modules.

[0013] A third aspect of an embodiment of the present application provides a charge and discharge circuit, comprising: a plurality of energy storage modules; a plurality of output switch modules, wherein the output end of one of the energy storage modules is connected to the output end of the discharge circuit through one of the output switch modules; a main control module, wherein the main control module is connected to each of the energy storage modules, and the main control module is used to obtain the voltage of the output end of each of the energy storage modules; a charging module, wherein the charging module is connected to each of the energy storage modules, and the charging module is used to provide a charging voltage to each of the energy storage modules based on the electric energy provided by an external power supply; the main control module is also connected to each of the output switch modules, and is used to control the conduction and disconnection of each of the output switch modules according to the voltage of the output end of each of the energy storage modules; the main control module is also connected to the charging module, and the main control module is used to adjust the charging voltage provided to each of the energy storage modules according to the voltage of the output end of each of the energy storage modules.

[0014] A fourth aspect of an embodiment of the present application provides a terminal device, comprising a discharge circuit as described above, or a charging circuit as described above, or a charge-discharge circuit as described above.

[0015] Compared with the prior art, the embodiments of the present application have the following beneficial effects: when the energy storage module is a detachable battery, even if the specifications of the newly replaced battery are different from those of other batteries and the voltage of the output end of the battery is different, when the voltage of the output end of each energy storage module is obtained through the main control module, the main control module can independently control the output of each energy storage module according to the voltage of the output end of each energy storage module. For example, the output of each energy storage module can be controlled according to the voltage of the output end of each energy storage module to avoid mutual influence between the energy storage modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a discharge circuit provided in an embodiment of the present application;

[0017] Figure 2 A circuit diagram of an output switch module provided in one embodiment of the present application;

[0018] Figure 3 A schematic diagram of a charging circuit provided in an embodiment of the present application;

[0019] Figure 4 A circuit diagram of a voltage regulating unit and a temperature detection module provided in an embodiment of the present application;

[0020] Figure 5 A schematic diagram of a charging and discharging circuit provided in an embodiment of the present application;

[0021] Figure 6 A schematic diagram of a terminal device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] Figure 1 A schematic diagram of a discharge circuit provided in an embodiment of the present application is shown. For ease of explanation, only the part related to the present embodiment is shown, which is described in detail as follows:

[0027] The discharge circuit 10 includes: a plurality of energy storage modules 100 , a plurality of output switch modules 200 and a main control module 300 .

[0028] The output end of an energy storage module 100 is connected to the output end OUT of the discharge circuit 10 through an output switch module 200. The main control module 300 is connected to each energy storage module 100, and the main control module 300 is used to obtain the voltage of the output end of each energy storage module 100. The main control module 300 is also connected to the main control module 300 and each output switch module 200, and is used to control the conduction and shutdown of each output switch module 200 according to the voltage of the output end of each energy storage module 100.

[0029] It should be noted that, generally, the higher the remaining power of the energy storage module 100, the higher the voltage at the output end of the energy storage module 100. The main control module 300 can perform analog-to-digital conversion on the voltage at the output end of the energy storage module 100, thereby obtaining a digital signal that can reflect the voltage at the output end of the energy storage module 100, and the main control module 300 can determine the voltage and remaining power at the output end of each energy storage module 100 according to each digital signal. In one embodiment, the main control module 300 can pre-store a mapping relationship table between the voltage at the output end of each energy storage module 100 and its remaining power, so that the remaining power can be determined according to the voltage at the output end.

[0030] In the case where the voltage of the output end of each energy storage module 100 is obtained through the main control module 300, the main control module 300 can independently control the output of each energy storage module 100 according to the voltage of the output end of each energy storage module 100. When the energy storage module 100 is a detachable battery, the compatibility with the battery can be improved. For example, when a new battery is replaced midway or multiple batteries are mixed and used, the voltages of the output ends of different energy storage modules 100 may be different. The main control module 300 can control the discharge of some energy storage modules 100 with higher voltages at the output end. After the power of the energy storage modules 100 with higher voltages at the output end decreases, the voltages of the output ends of each energy storage module 100 can be kept consistent, thereby improving the compatibility with the battery.

[0031] In some embodiments, the main control module 300 may include an integrated circuit or a microcontroller.

[0032] In one embodiment, after the main control module 300 determines the power of each energy storage module 100 according to the voltage at the output end of each energy storage module 100, the main control module 300 can be used to control the output switch module 200 corresponding to the energy storage module 100 with the highest power to turn on when the power difference between the energy storage module 100 with the highest power and the energy storage module 100 with the second highest power is greater than a preset threshold.

[0033] When the power difference between the energy storage module 100 with the highest power and the energy storage module 100 with the second highest power is greater than the preset threshold, it can be considered that there is a large gap between the power of the energy storage module 100 with the highest power and the other energy storage modules 100.

[0034] It is understandable that the power of the energy storage module 100 in this embodiment specifically refers to the remaining power of the energy storage module 100. When the energy storage module 100 uses a detachable battery, the remaining power of the energy storage module 100 with a newly replaced battery may be far greater than the remaining power of other energy storage modules 100. Correspondingly, the power of the energy storage module 100 with a newly replaced battery is far greater than the power of other energy storage modules 100. In the case where the output ends of each energy storage module 100 are interconnected, if all the energy storage modules 100 are discharged at the same time, it may cause the energy storage module 100 with a higher power to charge the energy storage module 100 with a lower power through the output end OUT of the discharge circuit 10, affecting the normal operation of the energy storage module 100 with a lower power, and easily causing safety hazards.

[0035] In some embodiments, the main control module 300 can count the power of each energy storage module 100 in the form of the percentage of the remaining power to the total power of one energy storage module 100. Exemplarily, the preset threshold can be specifically set to 1%. When the remaining power of the energy storage module 100 with the highest power is 90%, and the power of the energy storage module 100 with the second highest power is 85%, the power difference between the two energy storage modules 100 is 5%, which is greater than the preset threshold.

[0036] In some embodiments, the main control module 300 can be directly controlled according to the voltage of the output end of each energy storage module 100. For example, the preset threshold can be specifically set to 0.1V. When the voltage of the output end of the energy storage module 100 with the highest output voltage is 1.5V, and the voltage of the output end of the energy storage module 100 with the second highest output voltage is 1.3V, then the voltage difference at the output end between the two energy storage modules 100 is 0.2V, which is greater than the preset threshold.

[0037] In one embodiment, the main control module 300 is used to control the energy storage module 100 with the highest power and the output switch modules 200 corresponding to the energy storage module 100 with the highest power and the energy storage module 100 with the power difference between the energy storage module 100 with the second highest power not greater than the preset threshold to be turned on.

[0038] Among them, when the power difference between the energy storage module 100 with the highest power and the energy storage module 100 with the second highest power is not greater than the preset threshold, it can be considered that there is no large difference between the power of the energy storage module 100 with the highest power and other energy storage modules 100, so multiple energy storage modules 100 can be controlled to output simultaneously.

[0039] Exemplarily, the preset threshold value can be specifically set to 1%. When the remaining power of the energy storage module 100 with the highest power is 90%, and the power of the energy storage module 100 with the second highest power is 89%, the power difference between the two energy storage modules 100 is 1%, which is not greater than the preset threshold value. At this time, if there are multiple energy storage modules 100 with a power of 89%, the main control module 300 can control multiple energy storage modules 100 with a power of 89% and energy storage modules 100 with a power of 90% to output simultaneously through the corresponding output switch modules (200).

[0040] In some embodiments, the main control module 300 can be directly controlled according to the voltage of the output end of each energy storage module 100. For example, the preset threshold can be specifically set to 0.1V. When the voltages of the output ends of the three energy storage modules 100 are 1.2V, 1.4V and 1.45V respectively, after adding an energy storage module 100 with an output voltage of 1.5V, since the difference between 1.5V and 1.45V is 0.05V, the condition that the output voltage difference between the energy storage module 100 with the highest output voltage and the energy storage module 100 with the second highest output voltage is not greater than the preset threshold is satisfied, the main control module 300 can control the energy storage modules 100 with output voltages of 1.5V, 1.4V and 1.45V to output through the corresponding output switch modules (200) respectively.

[0041] In some embodiments, Figure 2 As shown, the main control module 300 can be connected to the output end of each energy storage module 100 through the analog-to-digital conversion unit 310 to obtain the voltage of the output end of each energy storage module 100 .

[0042] The analog-to-digital conversion unit 310 may include an analog-to-digital converter (ADC).

[0043] In one embodiment, the energy storage module 100 includes a battery and a battery compartment for installing the battery, and the battery is connected to the corresponding output switch module 200 and the main control module 300 through the battery compartment.

[0044] Specifically, the battery may be an AA battery (size 5 battery). The battery compartment allows for loading and unloading of the battery, and allows for quick replacement of the battery when the battery is exhausted. It is understandable that after some batteries are replaced, since the new battery has a higher power level and a higher output voltage, the output of each energy storage module 100 can be controlled through the output switch module 200, the main control module 300, and the main control module 300 of the above-mentioned embodiment to prevent the battery with a high voltage at the output end from affecting the battery with a low voltage at the output end.

[0045] In one embodiment, if Figure 2As shown, taking an output switch module 200 as an example, the output switch module 200 includes a first switch device Q1, a second switch device Q2, a third switch device Q3, a fourth switch device Q4, a first bias resistor R7, and a second bias resistor R8. The first end of the first switch device Q1 is connected to the output end of the corresponding energy storage module 100, the second end of the first switch device Q1 is connected to the second end of the second switch device Q2, the control end of the first switch device Q1 is connected to the second end of the third switch device Q3, the first end of the third switch device Q3 is grounded, the control end of the third switch device Q3 is connected to the main control module 300, the first end of the first bias resistor R7 is connected to the first end of the first switch device Q1, and the second end of the first bias resistor R7 is connected to the control end of the first switch device Q1. The first end of the second switch device Q2 is connected to the output end OUT of the discharge circuit 10, the control end of the second switch device Q2 is connected to the second end of the fourth switch device Q4, the second end of the fourth switch device Q4 is grounded, the control end of the fourth switch device Q4 is connected to the main control module 300, the first end of the second bias resistor R8 is connected to the first end of the second switch device Q2, and the second end of the second bias resistor R8 is connected to the control end of the second switch device Q2.

[0046] When the battery is discharging, the main control module 300 can simultaneously control the third switch device Q3 and the fourth switch device Q4 to be turned on. After the third switch device Q3 is turned on, the first switch device Q1 is also turned on. After the fourth switch device Q4 is turned on, the second switch device Q2 is also turned on. At this time, the output switch module 200 is turned on, and the energy storage module 100 can supply power to the output terminal OUT of the discharge circuit 10 through the output switch module 200.

[0047] In some embodiments, the first switch device Q1 and the second switch device Q2 are both P-type MOS tubes, and the third switch device Q3 and the fourth switch device Q4 are both N-type MOS tubes. When multiple energy storage modules 100 simultaneously supply power to the output terminal OUT of the discharge circuit 10, if the output voltage of a certain energy storage module 100 is too high, the second switch device Q2 in the output switch module 200 corresponding to other energy storage modules 100 will be turned off, so as to prevent the energy storage module 100 with a high voltage at the output terminal from supplying power to the energy storage module 100 with a low voltage at the output terminal, thereby protecting the energy storage module 100 with a low voltage at the output terminal. When the energy storage module 100 with a high voltage at the output terminal is removed, even if the second switch device Q2 corresponding to the energy storage module 100 with a low voltage at the output terminal is not turned on, the output terminal OUT of the discharge circuit 10 can be supplied with power through the body diode of the second switch device Q2 to avoid power failure.

[0048] Figure 3 A schematic diagram of a charging circuit provided in an embodiment of the present application is shown. For ease of description, only the part related to the present embodiment is shown, which is described in detail as follows:

[0049] The charging circuit 20 includes: a plurality of energy storage modules 100 , a charging module 400 and a main control module 300 .

[0050] The charging module 400 is connected to each energy storage module 100, and the charging module 400 is used to provide a charging voltage to each energy storage module 100 based on the electric energy provided by an external power supply; the main control module 300 is respectively connected to each energy storage module 100 and the charging module 400, and the main control module 300 is used to obtain the voltage at the output end of each energy storage module 100, and adjust the charging voltage provided to each energy storage module 100 according to the voltage at the output end of each energy storage module 100.

[0051] By acquiring the voltage at the output end of each energy storage module 100, the main control module 300 can configure the corresponding charging voltage according to the voltage at the output end of each energy storage module 100. In some embodiments, the main control module 300 can acquire the voltage at the output end of the energy storage module 100 to charge the energy storage module 100 by performing constant current charging, constant voltage charging, or a combination of the two through the charging module 400. A specific charging method is exemplified as follows:

[0052] If the voltage at the output end of the energy storage module 100 is lower than the first preset value, the energy storage module 100 is charged with a constant current using a first charging current. The voltage at the output end of the energy storage module 100 increases continuously as the charging process proceeds. The charging voltage of the energy storage module 100 can be dynamically adjusted according to the voltage at the output end of the energy storage module 100, so that the difference between the two is maintained at a certain value, thereby achieving constant current charging. If the voltage at the output end of the energy storage module 100 is greater than the second preset value, the energy storage module 100 can be charged with a constant current according to the second charging current until the voltage at the output end of the energy storage module 100 approaches the target value. When the voltage at the output end approaches the target value, the constant voltage charging method is changed to that of maintaining the charging voltage at a certain value. At this time, the charging current gradually decreases, and the charging is stopped when the voltage at the output end is the target value. Among them, the target value is greater than the second preset value and greater than the first preset value, and the second charging current is greater than the first charging current.

[0053] In one embodiment, if Figure 3 As shown, the charging module 400 includes a plurality of voltage regulating units 410 , a first end of each voltage regulating unit 410 is used to be connected to an external power source, and a second end of each voltage regulating unit 410 is connected to at least one energy storage module 100 .

[0054] One voltage regulating unit 410 can be connected to one energy storage module 100, that is, each voltage regulating unit 410 can supply power to the corresponding energy storage module 100. One voltage regulating unit 410 can also be connected to multiple energy storage modules 100, and how the voltage regulating unit 410 is specifically connected to the energy storage module 100 can be set according to actual needs.

[0055] In one embodiment, if Figure 3 , Figure 4 As shown, the main control module 300 is respectively connected to each voltage regulating unit 410 to control the charging voltage of each voltage regulating unit 410. The main control module 300 can control the charging of each energy storage module 100 through the voltage regulating unit 410 according to the voltage at the output end of each energy storage module 100, so that the voltage regulating unit 410 outputs the corresponding charging voltage.

[0056] Specifically, the main control module 300 can provide a reference voltage to each voltage regulating unit 410, and the voltage regulating unit 410 can provide a corresponding charging voltage to the energy storage module 100 according to the reference voltage. The external power supply can provide a 5V voltage to the voltage regulating unit 410 through the input interface IN. The input interface IN can specifically include a TYPE-C interface.

[0057] In some embodiments, Figure 4 As shown, taking a voltage regulating unit 410 as an example, the voltage regulating unit 410 includes a DC / DC voltage regulating chip U1, and the DC / DC voltage regulating chip U1 can perform voltage conversion based on the reference voltage received by the feedback pin FB and the electric energy provided by the external power supply to obtain and provide a charging voltage to the corresponding energy storage module 100. The output pin SW of the DC / DC voltage regulating chip U1 is connected to the corresponding energy storage module 100 through a diode D1, and the diode D1 can prevent the current of the energy storage module 100 from flowing back.

[0058] The voltage regulating unit 410 may specifically include a step-down circuit composed of a DC / DC voltage regulating chip U1.

[0059] In one embodiment, if Figure 4 As shown, the discharge circuit 10 also includes multiple temperature detection modules 500, each of which is connected to the main control module 300. The temperature detection module 500 is used to detect the temperature of at least one energy storage module 100, and the main control module 300 is used to control the charging voltage of each voltage regulating unit 410 according to the temperature of each energy storage module 100.

[0060] It is understandable that when the energy storage module 100 is charged, the temperature of the energy storage module 100 will rise. After obtaining the temperature of the energy storage module 100 through the temperature detection module 500, the main control module 300 can control the voltage regulating unit 410 to output a suitable charging voltage according to the temperature of each energy storage module 100 and the voltage at the output end of the energy storage module 100, so as to avoid the temperature of the energy storage module 100 being too high during the charging process or avoid the energy storage module 100 being overcharged, resulting in spontaneous combustion.

[0061] In some embodiments, the main control module 300 can control the charging voltage of the corresponding voltage regulating unit 410 according to the temperature and the voltage at the output end of the energy storage module 100. For example, the charging voltage can be reduced when the temperature of the energy storage module 100 exceeds the safe range or the voltage at the output end of the energy storage module 100 is high. The charging voltage can also be increased when the temperature of the energy storage module 100 is within the safe range and the voltage at the output end of the energy storage module 100 is low.

[0062] In some embodiments, Figure 4 As shown, taking a temperature detection module 500 as an example, the temperature detection module 500 includes a voltage-dividing resistor R5 and a thermistor R6. The first end of the voltage-dividing resistor R5 is used to access the working voltage VCC, and the second end of the voltage-dividing resistor R5 is respectively connected to the main control module 300 and the first end of the thermistor R6, and the second end of the thermistor R6 is grounded. The thermistor R6 can be set on the energy storage module 100. The temperature change of the energy storage module 100 will cause the resistance of the thermistor R6 to change, changing the first end voltage of the thermistor R6. The main control module 300 can determine the temperature of the energy storage module 100 according to the first end voltage of the thermistor R6.

[0063] Figure 5 A schematic diagram of a charging and discharging circuit provided in an embodiment of the present application is shown. For ease of explanation, only the part related to the present embodiment is shown, which is described in detail as follows:

[0064] The charge and discharge circuit 30 includes a plurality of energy storage modules 100 , a plurality of output switch modules 200 , a main control module 300 and a charging module 400 .

[0065] An output end of an energy storage module 100 is connected to an output end of the discharge circuit 10 via an output switch module 200 .

[0066] The main control module 300 is connected to each energy storage module 100 , and is used to obtain the voltage of the output end of each energy storage module 100 .

[0067] The charging module 400 is connected to each energy storage module 100 , and is used to provide a charging voltage to each energy storage module 100 based on the electric energy provided by an external power source.

[0068] The main control module 300 is also connected to each output switch module 200 respectively, and is used to control the on and off of each output switch module 200 according to the voltage at the output end of each energy storage module 100;

[0069] The main control module 300 is also connected to the charging module 400 , and the main control module 300 is used to adjust the charging voltage provided to each energy storage module 100 according to the voltage of the output end of each energy storage module 100 .

[0070] It is understandable that this embodiment may adopt the energy storage module 100, the output switch module 200, the main control module 300 and the charging module 400 of any of the above embodiments, which will not be described in detail in this embodiment.

[0071] Figure 6 A schematic diagram of a terminal device provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the present embodiment are shown, which are described in detail as follows:

[0072] The terminal device 40 includes the discharge circuit 10 of any of the above embodiments, and the discharge circuit 10 can provide power to other modules of the terminal device 40. The terminal device 40 can be a lighting device, and the discharge circuit 10 can supply power to the light-emitting device in the terminal device 40.

[0073] In some embodiments, the terminal device 40 includes a charging circuit 20 as in any of the above embodiments. It is understandable that when the terminal device 40 includes both the discharge circuit 10 and the charging circuit 20, the discharge circuit 10 and the charging circuit 20 can share the energy storage module and the main control module.

[0074] In some embodiments, the terminal device 40 includes the charge and discharge circuit 30 of any of the above embodiments. It is understandable that when the terminal device 40 includes both the discharge circuit 10 and the charge and discharge circuit 30, the discharge circuit 10 and the charge and discharge circuit 30 can share the energy storage module and the main control module.

[0075] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0076] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0077] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A discharge circuit, characterized in that: include: A plurality of energy storage modules (100); A plurality of output switch modules (200), wherein an output end of one of the energy storage modules (100) is connected to an output end of the discharge circuit (10) via one of the output switch modules (200); A main control module (300), the main control module (300) being connected to each of the energy storage modules (100) respectively, and the main control module (300) being used to obtain the voltage at the output end of each of the energy storage modules (100); The main control module (300) is also respectively connected to each of the output switch modules (200) and is used to control the on and off of each of the output switch modules (200) according to the voltage at the output end of each of the energy storage modules (100).

2. The discharge circuit according to claim 1, characterized in that: The main control module (300) determines the power level of each energy storage module (100) according to the voltage of the output end of each energy storage module (100) obtained; the main control module (300) is used to control the output switch module (200) corresponding to the energy storage module (100) with the highest power level to be turned on when the power difference between the energy storage module (100) with the highest power level and the energy storage module (100) with the second highest power level is greater than a preset threshold.

3. The discharge circuit according to claim 2, characterized in that: The main control module (300) is used to control the energy storage module (100) with the highest power and each of the output switch modules (200) corresponding to each of the energy storage modules (100) with the highest power and the energy storage module (100) with the second highest power to be turned on when the power difference between the energy storage module (100) with the highest power and the energy storage module (100) with the second highest power is not greater than the preset threshold.

4. The discharge circuit according to any one of claims 1 to 3, characterized in that: The energy storage module (100) comprises a battery and a battery compartment for installing the battery, and the battery is connected to the corresponding output switch module (200) and the main control module (300) through the battery compartment.

5. The discharge circuit according to any one of claims 1 to 3, characterized in that: The output switch module (200) comprises a first switch device Q1, a second switch device Q2, a third switch device Q3, a fourth switch device Q4, a first bias resistor R7 and a second bias resistor R8; The first end of the first switch device Q1 is connected to the output end of the corresponding energy storage module (100), the second end of the first switch device Q1 is connected to the second end of the second switch device Q2, the control end of the first switch device Q1 is connected to the second end of the third switch device Q3, the first end of the third switch device Q3 is grounded, the control end of the third switch device Q3 is connected to the main control module (300), the first end of the first bias resistor R7 is connected to the first end of the first switch device Q1, and the second end of the first bias resistor R7 is connected to the control end of the first switch device Q1; The first end of the second switch device Q2 is connected to the output end of the discharge circuit (10), the control end of the second switch device Q2 is connected to the second end of the fourth switch device Q4, the second end of the fourth switch device Q4 is grounded, the control end of the fourth switch device Q4 is connected to the main control module (300), the first end of the second bias resistor R8 is connected to the first end of the second switch device Q2, and the second end of the second bias resistor R8 is connected to the control end of the second switch device Q2.

6. A charging circuit, characterized in that: comprising a plurality of energy storage modules (100); A charging module (400), the charging module (400) being connected to each of the energy storage modules (100), the charging module (400) being used to provide a charging voltage to each of the energy storage modules (100) based on electric energy provided by an external power source; A main control module (300), the main control module (300) being connected to each of the energy storage modules (100) and the charging module (400) respectively, the main control module (300) being used to obtain the voltage at the output end of each of the energy storage modules (100), and to adjust the charging voltage provided to each of the energy storage modules (100) according to the voltage at the output end of each of the energy storage modules (100).

7. The charging circuit according to claim 6, characterized in that: The charging module (400) comprises a plurality of voltage regulating units (410), a first end of each of the voltage regulating units (410) being used to be connected to the external power source, and a second end of each of the voltage regulating units (410) being connected to at least one of the energy storage modules (100); The main control module (300) is respectively connected to each of the voltage regulating units (410) and is used to control the charging voltage output by each of the voltage regulating units (410) according to the voltage at the output end of each of the energy storage modules (100).

8. The charging circuit according to claim 7, characterized in that: It also comprises a plurality of temperature detection modules (500), each of the temperature detection modules (500) being connected to the main control module (300), the temperature detection module (500) being used to detect the temperature of at least one of the energy storage modules (100), and the main control module (300) being used to control the charging voltage of each of the voltage regulating units (410) according to the voltage at the output end of each of the energy storage modules (100) and the temperature of each of the energy storage modules (100).

9. A charging and discharging circuit, characterized in that: include: A plurality of energy storage modules (100); A plurality of output switch modules (200), wherein an output end of one of the energy storage modules (100) is connected to an output end of the discharge circuit (10) via one of the output switch modules (200); A main control module (300), the main control module (300) being connected to each of the energy storage modules (100) respectively, and the main control module (300) being used to obtain the voltage at the output end of each of the energy storage modules (100); A charging module (400), the charging module (400) being connected to each of the energy storage modules (100), the charging module (400) being used to provide a charging voltage to each of the energy storage modules (100) based on electric energy provided by an external power source; The main control module (300) is also connected to each of the output switch modules (200) respectively, and is used to control the on and off of each of the output switch modules (200) according to the voltage at the output end of each of the energy storage modules (100); The main control module (300) is also connected to the charging module (400), and the main control module (300) is used to adjust the charging voltage provided to each of the energy storage modules (100) according to the voltage at the output end of each of the energy storage modules (100).

10. A terminal device, characterized in that: It comprises the discharge circuit (10) according to any one of claims 1 to 5, the charging circuit (20) according to any one of claims 6 to 8, or the charge-discharge circuit (30) according to claim 9.

Images