Energy management circuit

Abstract

The utility model provides an energy management circuit, which relates to the technical field of energy management and comprises an energy input module, an energy management module and an energy output module. The energy input module comprises a solar energy input unit and a vibration energy input unit, the solar energy input unit is electrically connected with the energy management module, the vibration energy input unit is electrically connected with the energy management module through an integrated rectifier module, and the energy management module is connected with the energy output module. According to the utility model, seamless switching between solar energy and vibration energy is supported, the energy management chip automatically selects an optimal input source, and the energy utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy management technical field especially relates to an energy management circuit. BACKGROUND

[0002] The conventional energy storage battery power supply system relies on regular replacement or charging, and the maintenance cost is high in the field or industrial scene. Solar energy and vibration energy are weak energy widely existing in the environment, but the existing scheme has problems such as low energy conversion efficiency, high starting voltage and complex multi-source integration. For example, although the existing energy management chip supports multi-source input, the static current is high, which cannot adapt to the weak energy environment; at the same time, the energy input switching logic is complex, which reduces the system efficiency. In addition, there is a lack of effective buffer energy storage design in the prior art, which causes the energy storage battery to be charged and discharged frequently, thereby shortening its service life.

[0003] Therefore, an energy management circuit is proposed. SUMMARY

[0004] The present specification provides an energy management circuit, which supports seamless switching of solar energy and vibration energy, and an energy management chip automatically selects the optimal input source to improve energy utilization.

[0005] The present specification provides an energy management circuit, which includes an energy input module, an energy management module and an energy output module.

[0006] The energy input module includes a solar energy input unit and a vibration energy input unit, the solar energy input unit is electrically connected with the energy management module, the vibration energy input unit is electrically connected with the energy management module through an integrated rectifier module, and the energy management module is connected with the energy output module.

[0007] Optionally, the energy management module includes an energy management chip U1, the static current of which is lower than 500nA, and the cold starting voltage is lower than 400mV.

[0008] Optionally, the solar energy input unit includes a photovoltaic panel BT1, which is connected to the input end VIN of the energy management chip U1 through a Schottky diode D1.

[0009] Optionally, the vibration energy input unit includes a piezoelectric transducer Y1, and the alternating current signal output by the piezoelectric transducer Y1 is connected to the input end VIN of the energy management chip U1 through the integrated rectifier module.

[0010] Optionally, the energy output module includes a lithium battery BT3 and an energy storage unit for temporarily storing energy, and the energy management chip U1 is electrically connected with the lithium battery BT3 and the energy storage unit respectively.

[0011] Optionally, the energy storage unit includes a super capacitor C6, which realizes charging and discharging through a SYS pin of the energy management chip U1; the lithium battery BT3 realizes charging and discharging through a BAT pin of the energy management chip U1.

[0012] Optionally, the energy management chip U1 is set to have a charging cutoff voltage of 4.2V and a discharging protection voltage of 2.2V.

[0013] In the utility model, seamless switching of solar energy and vibration energy is supported, the energy management chip automatically selects the optimal input source, and the energy utilization rate is improved; the design of ultra-low static current and cold start voltage is suitable for weak energy environment, and significantly reduces system standby power consumption; through the buffer energy storage unit and intelligent charging and discharging management, the cycle number of the energy storage battery is reduced, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Figure 1 A structure diagram of an energy management circuit provided by the embodiment of the present application is provided.

[0016] Figure 2 A structure diagram of a multi-source energy input circuit provided by the embodiment of the present application is provided.

[0017] Figure 3 A structure diagram of an energy management chip configuration circuit provided by the embodiment of the present application is provided.

[0018] The drawings show: 10, a solar energy input unit; 20, a vibration energy input unit; 30, an integrated rectifier module; 40, an energy management module; 50, an energy storage unit. DETAILED DESCRIPTION

[0019] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought by those skilled in the art. The basic principles of the utility model defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the utility model.

[0020] The following will be described in detail with reference to the drawings. Figures 1-3Exemplary embodiments of the present application are described more fully hereinafter with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. Like reference numerals refer to like elements throughout the specification. It will be understood that no component element described herein is critical or essential unless the context clearly indicates otherwise.

[0021] In the premise of conforming to the technical concept of the present application, the features, structures, characteristics or other details described in a certain specific embodiment do not exclude that they can be combined in one or more other embodiments in a suitable manner.

[0022] In the description of specific embodiments, the features, structures, characteristics or other details described by the present application are to enable those skilled in the art to fully understand the embodiments. However, it does not exclude that one or more of the skilled in the art can practice the technical solution of the present application without a specific feature, structure, characteristic or other detail.

[0023] The flowchart shown in the accompanying drawings is only an exemplary illustration, and does not necessarily include all contents and operations / steps, nor does it necessarily execute in the order described. For example, some operations / steps can be further decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may be changed according to the actual situation.

[0024] The block diagram shown in the accompanying drawings is only a functional entity, which does not necessarily correspond to a physically independent entity. That is, these functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0025] The term "and / or" or "and / or" includes all combinations of any one or more of the associated listed items.

[0026] Figure 1 The structure schematic diagram of an energy management circuit provided for the embodiment of the present application comprises an energy input module, an energy management module and an energy output module.

[0027] The energy input module comprises a solar energy input unit and a vibration energy input unit, the solar energy input unit is electrically connected with the energy management module, the vibration energy input unit is electrically connected with the energy management module through an integrated rectifier module, and the energy management module is connected with the energy output module.

[0028] In the detailed description of the present specification, the dual input mode of solar energy and vibration energy forms an energy complementary mechanism. Solar energy can provide main power supply when there is sufficient light, and vibration energy can collect energy all day long by using mechanical vibration (such as kinetic energy of industrial equipment and vehicles). The two are intelligently switched by the energy management module, effectively solving the problem of single energy being restricted by the environment, and ensuring the continuous operation of the system under complex working conditions. The vibration energy unit is configured with an integrated rectifier module to efficiently convert alternating current generated by mechanical vibration into stable direct current. Compared with the traditional discrete rectification scheme, the integrated design can reduce conversion loss. The energy management module uses a dynamic priority algorithm to automatically execute the optimal charging and discharging strategy according to the input source state (light intensity, vibration frequency) and the capacity of the energy storage unit. The modular architecture allows flexible expansion of other input sources (such as thermal energy and radio frequency energy), and the output module supports adjustable output of multiple voltage levels to meet the needs of different loads such as Internet of Things sensors and low-power chips.

[0029] Optionally, the energy management module includes an energy management chip U1, which has a static current lower than 500nA and a cold start voltage lower than 400mV.

[0030] In the detailed description of the present specification, the static current <500nA characteristic reduces the standby power consumption of the module when there is no energy input (such as at night or when the device is stationary). The design of the cold start voltage threshold ≤400mV breaks through the conventional chip ≥0.8V start limit. This feature allows the system to extract energy directly from weak vibrations (such as 0.3g acceleration of human walking) or low-illumination environments (below 200 lux), effectively expanding the range of effective energy collection, especially suitable for extreme low-energy density scenarios such as underground pipeline monitoring and implantable medical devices.

[0031] Optionally, the solar energy input unit includes a photovoltaic panel BT1 connected to the input end VIN of the energy management chip U1 through a Schottky diode D1.

[0032] In the detailed description of the present specification, the low forward voltage drop characteristic of the Schottky diode D1 (usually 0.3-0.5V) significantly reduces the conduction loss of traditional rectifier diodes, effectively improving the energy conversion efficiency of the photovoltaic system, especially reducing power loss under low light conditions. Secondly, this diode builds a one-way conduction barrier that can precisely block reverse current at night or in low light conditions, preventing energy from flowing back to the photovoltaic panel from the energy storage unit, which protects the service life of the photovoltaic module and improves the safety of the system. The direct connection architecture with the energy management chip U1 realizes intelligent matching and dynamic adjustment of the input voltage. The built-in MPPT algorithm can track the maximum power point of the photovoltaic panel in real time, and the overvoltage / undervoltage protection and surge suppression functions are integrated to ensure stable operation of the system in complex environments.

[0033] Optionally, the vibration energy input unit comprises a piezoelectric transducer Y1, and an alternating current signal output by the piezoelectric transducer Y1 is connected to an input end VIN of the energy management chip U1 through the integrated rectifier module.

[0034] In the detailed description of the present specification, the integrated rectifier module replaces the traditional discrete diode scheme with an optimized full-bridge rectifier topology, efficiently converting the millivolt-level alternating current signal output by the piezoelectric transducer into a direct current signal. The low conduction voltage drop characteristic can improve the micro-energy harvesting efficiency and significantly reduce the vibration-to-electricity conversion loss. Secondly, the built-in active synchronous rectification technology in the module effectively suppresses the reverse leakage current. Combined with the dynamic impedance matching algorithm of the chip U1, it can optimize the transducer load point in real time and achieve maximum power tracking under wide amplitude vibration excitation, thereby improving energy capture. At the same time, the integrated design integrates input filtering and surge protection, and combined with the wide voltage domain adaptive capability and multi-stage energy storage mechanism of the chip U1, it ensures stable energy output under intermittent vibration conditions.

[0035] Optionally, the energy output module comprises a lithium battery BT3 and an energy storage unit for temporarily storing energy; and the energy management chip U1 is electrically connected with the lithium battery BT3 and the energy storage unit, respectively.

[0036] In the detailed description of the present specification, the energy output module adopts a dual-stage architecture of lithium battery BT3 and dedicated energy storage unit, and realizes collaborative control through the energy management chip U1, forming a multi-dimensional optimization design. The lithium battery provides high-density energy storage as the main energy storage body, while the energy storage unit composed of supercapacitors has millisecond-level response characteristics. The two are intelligently complementary through the dynamic path management technology of the chip U1: when the load changes suddenly, the energy storage unit can instantaneously release peak current, avoiding the direct bearing of high-frequency impact on the lithium battery and improving its cycle life. The adaptive shunt algorithm carried by the chip U1 can monitor the dual-end voltage in real time, and when the risk of over-discharge of the lithium battery is detected, it automatically switches to the energy storage unit for power supply, maintaining the continuous operation of the system for 12-30 minutes. The innovative hybrid charging strategy preferentially stores photovoltaic / vibration energy in the energy storage unit, and then transfers trickle current to the lithium battery when the voltage reaches the threshold. This mode reduces energy transmission loss and supports reliable energy storage in low-temperature environments.

[0037] Optionally, the energy storage unit comprises a supercapacitor C6, which realizes charging and discharging through a SYS pin of the energy management chip U1; and the lithium battery BT3 realizes charging and discharging through a BAT pin of the energy management chip U1.

[0038] In the specific embodiment of the present specification, the energy storage unit adopts the super capacitor C6 and the lithium battery BT3 through the shunt control architecture of the SYS and BAT pins of the energy management chip U1, to form an intelligent energy storage system with high and low frequency complementation. The super capacitor C6 realizes millisecond-level dynamic response through the SYS pin, can instantaneously absorb or release a pulse current of up to 5A, effectively suppresses the voltage fluctuation caused by load mutation, and at the same time provides buffer protection for the lithium battery BT3, so that the capacity attenuation rate of the lithium battery BT3 in the high-rate charging and discharging scene is reduced. The lithium battery BT3 is subjected to constant current-constant voltage optimized charging through the BAT pin, and the chip U1 dynamically adjusts the energy storage distribution strategy by monitoring the state of charge in real time: in the high-power consumption stage of the system, the super capacitor energy is preferentially called to avoid deep discharge of the lithium battery, and in the low-power standby state, the lithium battery is switched to continuous power supply, and the strategy prolongs the running time of the overall system. The independent dual-channel management mechanism of the chip U1 realizes physical isolation of the charging and discharging paths, and the reverse leakage current between the super capacitor and the lithium battery is suppressed to below 10nA, and the capacity utilization rate of the energy storage unit in extreme environments is ensured by cooperating with the built-in adaptive temperature compensation algorithm. In addition, the modular design integrates multiple levels of safety protection, including overvoltage clamping of the super capacitor and multiple protection (overcharge / overdischarge / short circuit) of the lithium battery, to form a full-cycle management closed loop from transient impact absorption to long-term stable energy supply, and to provide a high-reliability energy supply solution for intermittent load scenarios such as Internet of Things terminals.

[0039] Optionally, the energy management chip U1 is provided with a charging cutoff voltage of 4.2V and a discharging protection voltage of 2.2V.

[0040] In the specific embodiment of the present specification, the energy management chip U1 sets the double threshold strategy of the charging cutoff voltage 4.2V and the discharging protection voltage 2.2V, and realizes the dual optimization of safety and energy efficiency through precise voltage domain control. The charging cutoff voltage 4.2V strictly matches the chemical characteristics of the lithium ion battery (the standard upper limit of the lithium cobaltate system), and in combination with the built-in voltage detection accuracy of the chip, can intelligently switch to a trickle mode at the end of constant current-constant voltage charging, avoid electrolyte decomposition caused by overcharging, and improve the battery cycle life. The discharging protection voltage 2.2V is set at the lower limit of the safe discharge of the battery, and in combination with the dynamic load detection algorithm of the chip, can release more residual power while ensuring the stability of the battery structure, thereby significantly prolonging the system endurance time in extreme conditions.

[0041] In the utility model, seamless switching of solar energy and vibration energy is supported, the energy management chip automatically selects the optimal input source, and the energy utilization rate is improved; ultra-low static current and cold start voltage design, adapt to weak energy environment, significantly reduce the system standby power consumption; through the buffer energy storage unit and intelligent charging and discharging management, the cycle number of the energy storage battery is reduced, and the service life is prolonged.

[0042] The above-described specific embodiments further specifically describe the purposes, technical solutions and advantages of the present application, and it should be understood that the present application is not inherently related to any specific computer, virtual device or electronic device, and various general-purpose devices can also implement the present application. The above-described is only a specific embodiment of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0043] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment mainly describes the difference from other embodiments.

[0044] The above-described is only an embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy management circuit, characterized by, Comprising: energy input module, energy management module, energy output module; The energy input module comprises a solar energy input unit (10) and a vibration energy input unit (20), the solar energy input unit (10) is electrically connected with the energy management module (40), the vibration energy input unit (20) is electrically connected with the energy management module (40) through an integrated rectifier module (30), and the energy management module (40) is connected with the energy output module.

2. The energy management circuit of claim 1, wherein, The energy management module (40) comprises an energy management chip U1, the static current of which is lower than 500nA, and the cold start voltage is lower than 400mV.

3. The energy management circuit of claim 2, wherein, The solar energy input unit (10) comprises a photovoltaic panel BT1, which is connected to the input end VIN of the energy management chip U1 through a Schottky diode D1.

4. The energy management circuit of claim 3, wherein, The vibration energy input unit (20) comprises a piezoelectric transducer Y1, and the alternating current signal output by the piezoelectric transducer Y1 is connected to the input end VIN of the energy management chip U1 through the integrated rectifier module (30).

5. The energy management circuit of claim 4, wherein, The energy output module comprises a lithium battery BT3 and an energy storage unit (50) for temporarily storing energy; the energy management chip U1 is electrically connected with the lithium battery BT3 and the energy storage unit (50) respectively.

6. The energy management circuit of claim 5, wherein, The energy storage unit (50) comprises a super capacitor C6, which realizes charging and discharging through the SYS pin of the energy management chip U1; the lithium battery BT3 realizes charging and discharging through the BAT pin of the energy management chip U1.

7. The energy management circuit of claim 6, wherein, The charging cutoff voltage of the energy management chip U1 is set to 4.2V, and the discharge protection voltage is 2.2V.

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