Energy storage device based on friction power generator

[0021] Example one

[0022] Figure 2a with Figure 2b It shows a structural diagram of an energy storage device based on a friction generator provided in the first embodiment of the present invention. among them, Figure 2a Shows a modular structure diagram, Figure 2b Shows a structural diagram represented by electronic components. The energy storage device includes: a first friction generator 10, a first rectifier circuit 20, a first switch control element 30, a first inductance coil 401, a second inductance coil 402, a second switch control element 50 and an energy storage element 60.

[0023] The following describes the circuit connection relationship between each of the above parts in detail:

[0024] Such as Figure 2a with Figure 2b As shown, the first friction generator 10 includes two ends, a first end 10A and a second end 10B, respectively. The first rectifier circuit 20 includes four terminals, namely a first terminal 20A, a second terminal 20B, a third terminal 20C, and a fourth terminal 20D. The first switch control element 30 includes three terminals, namely a first terminal 30A, a second terminal 30B, and a first power terminal 30C. In actual situations, the first switch control element 30 also includes a second power terminal (not shown in the figure). Shown), and its second power terminal is usually a ground terminal, which is used in conjunction with the first power terminal 30C of the first switch control element 30. Of course, the second power terminal of the first switch control element 30 can also be connected to other reference potentials. Point, not limited here. The first inductance coil 401 includes three ends, namely a first end 401A, a second end 401B, and a third end 401C. The second inductance coil 402 includes three ends, namely a first end 402A, a second end 402B, and a third end 402C. The second switch control element 50 includes three terminals, namely a first terminal 50A, a second terminal 50B, and a first power terminal 50C. In actual situations, the second switch control element 50 also includes a second power terminal (not shown in the figure). Shown), and its second power terminal is usually a ground terminal, which is used in conjunction with the first power terminal 50C of the second switch control element 50. Of course, the second power terminal of the second switch control element 50 can also be connected to other reference potentials. Point, not limited here. The energy storage element 60 includes two ends, a first end 60A and a second end 60B, respectively.

[0025] Specifically, the first end 10A and the second end 10B of the first friction generator 10 are respectively connected to the first end 20A and the second end 20B of the first rectifier circuit 20. The third terminal 20C and the fourth terminal 20D of the first rectifier circuit 20 are respectively connected to the first terminal 30A of the first switching control element 30 and the second terminal 401B of the first inductor 401 respectively. The second terminal 30B of the first switching control element 30 is simultaneously connected to the first terminal 401A and the third terminal 401C of the first inductance coil 401, and the first power terminal 30C of the first switching control element 30 is simultaneously connected to the second switching control element 50. The first power terminal 50C of the power supply is connected to the first terminal 60A of the energy storage element 60. The first terminal 50A of the second switch control element 50 is simultaneously connected to the first terminal 402A and the third terminal 402C of the second inductor 402, and the second terminal 50B of the second switch control element 50 is connected to the first terminal of the energy storage element 60 Connected to 60A. The second end 402B of the second inductance coil 402 is simultaneously connected to the second end 401B of the first inductance coil 401 and the second end 60B of the energy storage element 60. The second power terminal (not shown in the figure) of the first switch control element 30 and the second power terminal (not shown in the figure) of the second switch control element 50 are both connected to the second terminal 60B of the energy storage element 60.

[0026] Figure 2a with Figure 2b The circuit connection relationship shown is only a schematic connection relationship, and those skilled in the art can also make various flexible changes to the connection modes of some of the components, which is not limited by the present invention. For example, the first switching control element 30 can obviously also be connected between the fourth terminal 20D of the first rectifier circuit 20 and the second terminal 401B of the first inductor 401; similarly, the second switching control element 50 is obviously also It can be connected between the second end 402B of the second inductance coil 402 and the second end 60B of the energy storage element 60.

[0027] In addition, the first end 60A of the energy storage element 60 is connected to the first power supply end 30C of the first switching control element 30 and the first power supply end 50C of the second switching control element 50, and the second end 60B of the energy storage element 60 is connected to The purpose of connecting the second power terminal (not shown in the figure) of the first switching control element 30 and the second power terminal (not shown in the figure) of the second switching control element 50 is to connect the first switching control element 30 and the The two switch control elements 50 provide electric energy. Those skilled in the art can also flexibly choose other implementations. For example, one way, the first switch control element 30 and the second switch control element 50 are implemented by passive devices that do not require electric energy drive. Realized by a separate self-powered device (for example, a friction generator is further provided inside the first switch control element 30 and the second switch control element 50). In this way, the first end 60A of the energy storage element 60 can be omitted The first power supply terminal 30C of the first switching control element 30 and the first power supply terminal 50C of the second switching control element 50, and the second terminal 60B of the energy storage element 60 and the second power supply terminal of the first switching control element 30 ( (Not shown in the figure) and the second power supply terminal (not shown in the figure) of the second switch control element 50. In another way, the energy storage device in this embodiment further includes a first switching control element 30 (that is, the first power supply terminal 30C and the second power supply terminal of the first switching control element 30) and a second switching control element 50 ( That is, the battery element connected to the first power terminal 50C and the second power terminal of the second switch control element 50. In this way, the first terminal 60A of the energy storage element 60 and the first switch control element 30 can also be omitted. The first power terminal 30C and the first power terminal 50C of the second switch control element 50, and the second terminal 60B of the energy storage element 60 and the second power terminal (not shown in the figure) of the first switch control element 30 and The circuit connection between the second power terminals (not shown in the figure) of the second switch control element 50.

[0028] In addition, the first switch control element 30 and/or the second switch control element 50 can also be connected to the battery element and the energy storage element at the same time, so as to select at least one of the battery element and the energy storage element for power supply according to the actual situation. For example, It is set that when the energy storage element 60 is powered, the energy storage element 60 is preferentially used for power supply; or, when the battery element is powered, the battery element is preferentially used for power supply, etc. In short, those skilled in the art can make various modifications to the above-mentioned circuit structure, as long as the purpose of increasing the power output through the coupled inductor coil group can be achieved.

[0029] And, in Figure 2a with Figure 2b In the circuit shown, the first end 60A and the second end 60B of the energy storage element 60 can either input electrical energy or provide external electrical energy. In other embodiments, the energy storage element 60 can also have separate electrical energy output terminals. , The power output terminal is correspondingly connected with the first power terminal 30C and the second power terminal of the first switch control element 30, and the first power terminal 50C and the second power terminal of the second switch control element 50.

[0030] In addition, it should be emphasized that Figure 2a as well as Figure 2b The first inductance coil 401 and the second inductance coil 402 in are both sliding-tap coils, and when the sliding-tap is slid to different positions, they respectively correspond to different coil turns. For example, the third end 401C of the first inductance coil 401 is a sliding tap end in actual situations, and the number of turns and inductance of the first inductance coil 401 can be adjusted by adjusting the position of the sliding tap of this end. Correspondingly, the first switch control element 30 further includes: a first sliding adjustment module (not shown in the figure) connected to the sliding tap at the third end 401C of the first inductance coil 401, therefore, the first switch control element 30 By controlling the first sliding adjustment module, the number of turns and the inductance of the first inductance coil 401 connected with the first rectifier circuit 20 can be flexibly controlled. Similarly, the third end 402C of the second inductance coil 402 is also a sliding tap end in actual situations, and the number of turns and inductance of the second inductance coil 402 can be adjusted by adjusting the position of the sliding tap of this end. Correspondingly, the second switch control element 50 further includes: a second sliding adjustment module (not shown in the figure) connected to the sliding tap at the third end 402C of the second inductance coil 402, therefore, the second switch control element 50 By controlling the second sliding adjustment module, the number of turns and the inductance of the second inductance coil 402 connected with the energy storage element 60 can be flexibly controlled.

[0031] The following describes the working principle of the energy storage device of the first embodiment in combination with the above-mentioned circuit connection relationship: wherein, the first friction generator 10 is used to convert the mechanical energy acting on it into electrical energy. The first rectifier circuit 20 is used for rectifying the electric energy output by the first friction generator 10. The first switching control element 30 is used to control the connection or disconnection between the first rectification circuit 20 and the first inductance coil 401 according to the electric energy value output by the first rectification circuit 20, wherein, when the first switching control element 30 controls the first When the rectifying circuit 20 is connected to the first inductive coil 401, the number of turns of the first inductive coil 401 connected to the first rectifying circuit 20 is further determined according to the value of the electric energy output by the first rectifying circuit 20 (that is, the number of turns of the first inductive coil 401 connected to the first inductive coil 401 is determined The position of the first sliding adjustment module connected to the sliding tap at the third end 401C). The first inductance coil 401 is connected to the first rectifier circuit 20 through the first switch control element 30, and is used to store the electric energy output by the first rectifier circuit 20 when it is connected to the first rectifier circuit 20. In addition, since the first inductance coil 401 and the second inductance coil 402 form a coupled inductance coil group, the electric energy stored in the first inductance coil 401 will gradually be transferred to the second inductance coil 402. The second switch control element 50 is used to control the connection or disconnection between the second inductance coil 402 and the energy storage element 60 according to the electric energy value output by the second inductance coil 402, wherein, when the second switch control element 50 controls the second inductance When the coil 402 is connected with the energy storage element 60, the number of turns of the second inductance coil 402 connected with the energy storage element 60 is further determined according to the electric energy value in the second inductance coil 402 (that is, the third The position of the second sliding adjustment module connected to the sliding tap at the end 402C). The energy storage element 60 is connected to the second inductance coil 402 through the second switch control element 50 and is used to store the electric energy in the second inductance coil 402 when it is connected to the second inductance coil 402.

[0032] The working process of the energy storage device in the first embodiment specifically includes the following steps:

[0033] Step 1: When an external force acts on the first friction generator 10, the first friction generator 10 converts the mechanical energy acting on it into electrical energy, and passes through the first end 10A and the second end of the first friction generator 10 10B is output to the first rectifier circuit 20;

[0034] Step 2: After the first rectifier circuit 20 receives the above-mentioned electric energy through its first terminal 20A and its second terminal 20B, it rectifies the electric energy and outputs it to the first switch control through its third terminal 20C and fourth terminal 20D The first end 30A of the element 30 and the second end 401B of the first inductor 401;

[0035] Step 3: In the process of the above steps 1 and 2, the first switch control element 30 uses the output of the first terminal 60A and the second terminal 60B of the energy storage element 60 to the first power terminal 30C and the second power terminal. Electric energy, real-time monitoring of the electric energy value output by the first rectifier circuit 20, when the monitored electric energy value output by the first rectifier circuit 20 is greater than or equal to the preset first connection threshold, the switch in the first switch control element 30 changes from normal The open state is switched to the closed state, so that the first rectifier circuit 20 is connected to the first inductive coil 401, so that the electric energy output by the first rectifier circuit 20 is stored in the first inductive coil 401; when the first rectifier circuit 20 is monitored When the output power value is less than the preset first connection threshold, the switch in the first switch control element 30 is kept in a normally open state, so that the circuit between the first rectifier circuit 20 and the first inductor 401 is kept open status.

[0036] For example, taking the voltage parameter as an example, if the preset first connection voltage threshold (ie, the first connection threshold) in the first switch control element 30 is 100V, if the voltage value output by the first rectifier circuit 20 is greater than or equal to the first Connecting the voltage threshold of 100V, the first rectifier circuit 20 is connected to the first inductive coil 401 through the first switching control element 30, so that the electric energy output by the first rectifier circuit 20 is stored in the first inductive coil 401, if the first rectifier circuit If the voltage value output by 20 is less than 100V, the first switching control element 30 disconnects the first rectifier circuit 20 from the first inductor 401. In addition, in order to avoid frequent on and off problems caused by fluctuations of the electrical energy output by the first rectifier circuit up and down 100V, the first connection threshold may not only be a specific point value, but also a preset threshold range.

[0037] In addition, during the process in which the first rectifying circuit 20 is connected to the first inductive coil 401, the first switching control element 30 further determines the first inductive coil 401 connected to the first rectifying circuit 20 according to the value of the electric energy output by the first rectifying circuit 20 The number of turns. To this end, the electric energy interval greater than or equal to the first connectivity threshold is divided into a plurality of first sub-intervals, and the corresponding number of turns of the first inductive coil 401 is set for each first sub-interval. The sub-intervals respectively correspond to different numbers of turns of the first inductive coil 401. Correspondingly, the number of turns of the corresponding first inductance coil 401 is determined according to the first sub-interval to which the electric energy value currently output by the first rectifier circuit 20 belongs. In addition, in order to avoid the problem of frequent switching between the turns corresponding to the multiple first sub-intervals caused by the fluctuation of the electric energy value of the first rectifier circuit 20, a switching threshold can be set in advance. When the interval range to which the electric energy value belongs changes from one of the first sub-intervals (that is, the current sub-interval) to another adjacent first sub-interval (that is, the changed sub-interval), the first rectifier circuit 20 needs to be The current energy value is compared with the interval threshold between the current sub-interval and the changed sub-interval, and only when the difference between the two is greater than the preset switching threshold, the number of turns of the first inductive coil 401 is correspondingly switched to The number of turns corresponding to another adjacent sub-interval.

[0038] For ease of description, suppose that an interval threshold of 800V divides an electric energy interval greater than or equal to the first connection threshold of 100V into two first subintervals, namely "100V to 800V" (that is, the range of the first subinterval is greater than or Equal to 100V and less than 800V) and "above 800V" (that is, the range of the first sub-interval is greater than or equal to 800V), where the number of coil turns corresponding to the first sub-interval of "100V to 800V" is N1, "above 800V" The number of coil turns corresponding to the first sub-interval of "is N2, N1 and N2 are all natural numbers, and N1 is less than N2. In specific implementation, when the first rectifier circuit 20 is just connected to the first inductance coil 401, the electric energy value output by the first rectifier circuit 20 may be in the first sub-interval of "100V to 800V". Therefore, at this time, the first The switch control element 30 controls the first sliding adjustment module to make the number of turns of the first inductance coil 401 N1. For example, it can control the first sliding adjustment module so that the sliding tap at the third end 401C of the first inductance coil 401 is located in the coil. The middle position so that only the lower half of the coil works. After the first rectifier circuit 20 is connected to the first inductance coil 401 for a period of time, the electric energy value output by the first rectifier circuit 20 may be in the first sub-interval of "800V or more". Therefore, at this time, the first switching control element 30 passes through The first sliding adjustment module is controlled so that the number of turns of the first inductive coil 401 is N2. For example, the sliding tap at the third end 401C of the first inductive coil 401 can be located at the top position of the coil by controlling the first sliding adjustment module. Make the entire coil work.

[0039] In the above process, in order to avoid frequent switching of the number of turns of the first inductor 401 caused by the fluctuation of the electric energy value output by the first rectifier circuit 20 up and down 800V, the above-mentioned switching threshold can be set in advance as 50V, only when the fluctuation amplitude of the electric energy value output by the first rectifier circuit 20 is greater than the switching threshold, the number of coil turns is adjusted. For example, when the electric energy value output by the first rectifier circuit 20 is in the first sub-interval from 100V to 800V, that is, when the number of turns of the first inductive coil 401 is N1, the first inductive coil 401 will only be turned on when the electric energy value fluctuates to 850V. The number of turns is adjusted to N2; in the same way, when the electrical energy value output by the first rectifier circuit 20 is in the first sub-interval of "800V or more", that is, when the number of turns of the first inductive coil 401 is N2, only when the electrical energy value fluctuates to Adjust the number of turns of the first inductance coil to N1 when 750V. In this way, it is possible to avoid frequent switching of the number of coil turns due to small fluctuations in the value of the electric energy output by the first rectifier circuit 20.

[0040] Step 4: After the first inductance coil 401 receives the electric energy output by the first rectifier circuit 20 through the first terminal 401A and the second terminal 401B, the electric energy is stored. Since the first inductance coil 401 and the second inductance coil 402 form a coupled inductance coil group, the electric energy stored in the first inductance coil 401 will be output to the second inductance coil 402 for storage. Preferably, as Figure 2b As shown, the first inductance coil 401 and the second inductance coil 402 are coupled with each other through the connection of different names, so as to increase the electric energy of the coupled inductance coil group formed by the first inductance coil 401 and the second inductance coil 402 Storage rate.

[0041] Step 5: In the process of the above steps 1 to 4, the second switch control element 50 uses the electric energy output to the first power terminal 50C and the second power terminal 50C and the second power terminal 60A and 60B of the energy storage element 60 , Real-time monitoring of the electrical energy value output by the second inductor coil 402, if the electrical energy value output by the second inductor coil 402 is greater than or equal to the preset second connection threshold, the second switch control element 50 makes the second inductor coil 402 and the energy storage element 60 is connected, so that the electrical energy output by the second inductive coil 402 is stored in the energy storage element 60; if the electrical energy value output by the second inductive coil 402 is less than the second connection threshold, the second switching control element 50 makes the second inductive coil 402 and The energy storage element 60 is disconnected.

[0042] Taking the voltage parameter as an example, if the second connection threshold preset in the second switch control element 50 is 100V, and if the voltage value output by the second inductor 402 is greater than or equal to the second connection threshold 100V, the second inductor 402 passes The second switching control element 50 is connected to the energy storage element 60, so that the electric energy output by the second inductance coil 402 is stored in the energy storage element 60; if the voltage value output by the second inductance coil 402 is less than the preset second connection threshold 100V, The second switching control element 50 disconnects the second inductor 402 from the energy storage element 60. Because the output voltage of the friction generator is relatively high, under normal circumstances, the voltage value generated by each effective power generation process will be higher than 100V. Therefore, when the second connection threshold is set to 100V, each effective power generation process can be made The electricity generated is stored. Of course, those skilled in the art can also flexibly adjust the specific value of the second connection threshold as required, and the second connection threshold can also be expressed in the form of current. In addition, in order to avoid frequent on and off problems caused by fluctuations of the electrical energy output by the second inductor coil up and down 100V, the second connection threshold may be a predetermined threshold range in addition to a specific point value. Moreover, considering the transmission loss inside the coupled inductor, the second connection threshold may also be slightly smaller than the first connection threshold.

[0043] In addition, when the second inductance coil 402 is in communication with the energy storage element 60, the second switch control element 50 further determines the turns of the second inductance coil 402 that is in communication with the energy storage element 60 according to the electric energy value output by the second inductance coil 402. number. Specifically, when determining the number of turns of the second inductive coil 402, at least one of the following two implementation manners can be flexibly selected:

[0044] The first implementation method is similar to step 3. The electric energy interval greater than or equal to the second connectivity threshold is divided into a plurality of second sub-intervals, and the corresponding number of turns of the second inductance coil 402 is set for each second sub-interval. , Where each second sub-interval corresponds to a different number of turns of the second inductance coil 402. Correspondingly, the number of turns of the corresponding second inductance coil 402 is determined according to the second sub-interval to which the electric energy value in the second inductance coil 402 belongs. In addition, in order to avoid the frequent switching between the number of turns corresponding to the second sub-intervals caused by the fluctuation of the electric energy value of the second inductive coil 402, a switching threshold can be preset. When the interval range to which the electric energy value belongs changes from one of the second sub-intervals (that is, the current sub-interval) to another adjacent second sub-interval (that is, the changed sub-interval), the second inductance coil 402 The current electric energy value is compared with the interval threshold between the current sub-interval and the changed sub-interval, and only when the difference between the two is greater than the preset switching threshold, the number of turns of the second inductive coil 402 is correspondingly switched to The number of turns corresponding to another adjacent sub-interval.

[0045] For ease of description, suppose that an interval threshold of 800V divides the energy interval greater than or equal to the second connection threshold of 100V into two second subintervals, namely "100V to 800V" (that is, the range of the second subinterval is greater than or Equal to 100V and less than 800V) and "above 800V" (that is, the range of the second sub-interval is greater than or equal to 800V), where the number of coil turns corresponding to the second sub-interval of "100V to 800V" is N1', "800V The number of coil turns corresponding to the second sub-interval of "above" is N2', N1' and N2' are both natural numbers, and N1' is less than N2'. In specific implementation, when the second inductive coil 402 is just connected to the energy storage element 60, the energy value output by the second inductive coil 402 may be in the second sub-range of "100V to 800V". Therefore, at this time, the second switch The control element 50 controls the second sliding adjustment module so that the number of turns of the second inductive coil 402 is N1'. For example, the second sliding adjustment module can be controlled to make the sliding tap at the third end 402C of the second inductive coil 402 located in the coil The middle position, so that only the lower half of the coil works. When the second inductive coil 402 is connected to the energy storage element 60 for a period of time, the electrical energy output by the second inductive coil may be in the second sub-interval of "800V or more". Therefore, at this time, the second switch control element 50 controls the first The second sliding adjustment module sets the number of turns of the second inductance coil 402 to N2'. For example, the second sliding adjustment module can be controlled so that the sliding tap at the third end 402C of the second inductance coil 402 is located at the top position of the coil, so that The entire coil works.

[0046] In the above process, in order to avoid frequent switching of the number of turns of the second inductance coil 402 caused by the fluctuation of the electric energy value output by the second inductance coil 402 up and down 800V, the switching threshold mentioned above can also be set in advance. It is 50V, and only when the fluctuation amplitude of the electric energy value output by the second inductive coil 402 is greater than the switching threshold, the number of coil turns is adjusted. For example, when the electric energy value output by the second inductance coil 402 is in the second sub-range of "100V to 800V", that is, when the number of turns of the second inductance coil 402 is N1', the second inductance coil 402 will only be changed when the electric energy value fluctuates to 850V. The number of turns of the inductance coil 402 is adjusted to N2'; in the same way, when the energy value output by the second inductance coil 402 is in the second sub-interval of "800V and above", that is, when the number of turns of the second inductance coil 402 is N2', only when When the electric energy value fluctuates to 750V, the number of turns of the second inductive coil 402 is adjusted to N1'. In this way, it is possible to avoid frequent switching of the number of coil turns due to small fluctuations in the electrical energy value output by the second inductor coil 402.

[0047] In the above example, the interval threshold used to divide the second subinterval is the same as the interval threshold used to divide the first subinterval, and both are 800V. In actual situations, considering the transmission loss inside the coupled inductor coil group, the interval threshold used to divide the second sub-interval may also be slightly lower than the interval threshold used to divide the first sub-interval, for example, set to 750V. Moreover, the interval threshold can be either a point value or a range.

[0048] It can be seen that, in the above-mentioned first implementation manner, the magnitude of the electric energy value in the second inductance coil 402 is monitored, and the number of turns of the second inductance coil 402 is set according to a preset corresponding relationship. In the second implementation manner, the corresponding relationship between the number of turns of the first inductance coil 401 and the number of turns of the corresponding second inductance coil 402 corresponding to each first sub-interval can also be preset, according to the The number of turns of the first inductor 401 connected by the circuit 20 determines the number of turns of the corresponding second inductor 402. For example, suppose in step 3 that the interval threshold of 800V is still used to divide the energy interval greater than or equal to the first connection threshold of 100V into two first sub-intervals of "100V to 800V" and "800V above", where "100V to 800V" The number of turns of the first inductive coil 401 corresponding to the first sub-interval of is N1, and the number of turns of the corresponding second inductive coil 402 is N1'; the first inductive coil corresponding to the first sub-interval of "800V" The number of turns of 401 is N2, and the corresponding number of turns of the second inductance coil 402 is N2'. That is, the matching relationship between the number of turns of the first inductance coil 401 and the number of turns of the second inductance coil 402 is preset. When the number of turns of the first inductance coil 401 is N1, the number of turns of the second inductance coil 402 must be Is N1'; when the number of turns of the first inductive coil 401 is N2, the number of turns of the second inductive coil 402 must be N2'. According to preset calculations and experiments, the best matching relationship between the number of turns of the first inductive coil 401 and the number of turns of the second inductive coil 402 can be determined, which can simplify the adjustment of the number of turns of the second inductive coil 402 The process can improve the impedance matching effect. Of course, the above two implementation modes can be used alone or in combination, which is not limited in the present invention.

[0049] It should be understood that the above steps 1 to 5 are a cyclical process, so that the function of supplementing power supply for the energy storage element 60 is realized, which makes up for the loss of the energy storage element 60 providing electric energy to the outside, thereby extending the entire energy storage. The service life of the device.

[0050] In addition, according to the impedance matching principle, the output power is maximum when the internal resistance of the signal source matches the load impedance. Therefore, in the first embodiment, the coupled inductance coil group formed by the first inductance coil 401 and the second inductance coil 402 is used to match the impedances of the first friction generator 10 and the energy storage element 60 to each other, so that the first The output power of the friction generator 10 reaches the maximum.

[0051] Specifically, according to the impedance matching principle, the relevant parameters of the coupled inductor coil group are determined in the following manner:

[0052] First, the impedance (ie, internal impedance) of the first friction generator is measured according to the internal resistance method. Specifically, first connect the first friction generator with resistors of different resistance values, test the partial pressure value of the resistor, and then combine the formula P=U 2 /R draws the relationship between power and resistance of resistors with different resistance values, where P is power, U is voltage, and R is resistance, such as image 3 Shown. According to the principle of maximum output power when the impedance of the first friction generator is equal to the impedance of the resistor connected to it, after finding the maximum power density point, read the corresponding resistance value, which is the impedance of the first friction generator. Those skilled in the art can also flexibly adopt other methods to determine the impedance of the first friction generator, and the present invention does not limit the specific determination method. In addition, after measuring the partial pressure of different resistances, the formula I=U/R can also be used to obtain I first, and then according to the formula P=I 2 R draws a graph of the relationship between power and resistance of resistors of different resistance values, where P is power, I is current, and R is resistance, such as image 3 Shown.

[0053] Then, determine the impedance of the energy storage element. Specifically, the impedance of the energy storage element can be determined according to the parameters of the energy storage element used in the actual application, and the impedance of the energy storage element can also be determined by various other methods.

[0054] Finally, the parameters of the coupled inductance coil group are determined according to the impedance of the first friction generator and the impedance of the energy storage element. Specifically, the impedance of the first friction generator can be understood as the primary impedance, and the impedance of the energy storage element can be understood as the secondary impedance. According to the known formula, the relationship between the impedance ratio of the primary impedance and the secondary impedance is: Primary impedance=(n×n) secondary impedance, where n is the ratio of turns between the first inductance coil and the second inductance coil. Therefore, it is determined that the turns ratio between the first inductance coil and the second inductance coil is n:1. According to the formula L=N 2 /R g =μ 0 A c N 2 /l g , You can determine the inductance L of the first inductance coil 1 =N 2 /R g =μ 0 A c n 2 /l g , And the inductance L of the second inductance coil 2 =N 2 /R g =1/R g =μ 0 A c /l g. Among them, N is the number of coil turns, R g Is magnetoresistance, μ 0 Is the permeability constant, A c Is the cross-sectional area of ​​the magnetic core, l g Is the gap length. In the above formula, the permeability constant μ 0 , Core cross-sectional area A c , Gap length l g It is a known quantity and is related to the material of the selected magnetic core and the geometric size of the magnetic core.

[0055] It can be seen that, in this embodiment, by selecting appropriate parameters for the coupled inductance coil set, the impedance of the first friction generator and the impedance of the energy storage element are matched with each other, so that the output power of the first friction generator reaches The maximum value can effectively reduce the waste of electrical energy caused by impedance mismatch, and can efficiently supplement electrical energy for the energy storage element.

[0056] In addition, in the first embodiment, a first switch control element is provided, and the electric energy value output by the first rectifier circuit can be monitored through the first switch control element, and only when the electric energy value output by the first rectifier circuit is higher than the first connection threshold value The first inductive coil stores electrical energy. In this way, when the first triboelectric generator is inadvertently subjected to micro-vibration to generate electricity, the generated electric energy is small and insufficient to turn on the first switch control element, thus avoiding repeated charging. It is of great benefit to extend the service life of the electronic components inside the energy storage device. In addition, those skilled in the art can also make various changes and modifications to the first embodiment. For example, on the basis of the first embodiment, the first switch control element is further configured as a passive device or a device capable of being self-powered by the friction generator, so as to achieve the ability to monitor the first switch control element without additional power consumption of the energy storage element. The purpose of the electric energy value output by the rectifier circuit.

[0057] Embodiment two

[0058] Figure 4 It shows a structural diagram of a friction generator-based energy storage device provided in the second embodiment of the present invention. The energy storage device includes: a first friction generator 10, a first rectifier circuit 20, a first switch control element 30, a first inductance coil 401, a second inductance coil 402, a second switch control element 50 and an energy storage element 60. The main difference between the second embodiment and the first embodiment is that the first inductive coil 401 and the second inductive coil 402 are both multi-tap coils, and each tap corresponds to a different number of turns of the coil. Correspondingly, the first switch control element 30 further includes: a plurality of switches, each switch is respectively connected to a tap in the first inductance coil 401, the first switch control element 30 controls the first switch by controlling the on and off of the plurality of switches. Connecting or disconnecting the rectifying circuit 20 and the first inductive coil 401, and controlling the number of turns of the first inductive coil 401 connected to the first rectifying circuit 20; and/or, the second switching control element 50 further includes: a plurality of switches Each switch is connected to a tap of the second inductance coil 402, and the second switch control element 50 controls the connection or disconnection of the second inductance coil 402 and the energy storage element 60 by controlling the on and off of a plurality of switches, and The number of turns of the second inductive coil 402 connected with the energy storage element 60 is controlled.

[0059] The following describes the circuit connection relationship in the second embodiment:

[0060] Such as Figure 4 As shown, the first friction generator 10 includes two ends, a first end 10A and a second end 10B, respectively. The first rectifier circuit 20 includes four terminals, namely a first terminal 20A, a second terminal 20B, a third terminal 20C, and a fourth terminal 20D. The first switch control element 30 includes four terminals, namely a first terminal 30A, a second terminal 30B, a first power terminal 30C, and a fourth terminal 30D. In actual situations, the first switch control element 30 also includes a second power source. Terminal (not shown in the figure), and its second power terminal is usually a ground terminal, which is used in conjunction with the first power terminal 30C of the first switch control element 30. Of course, the second power terminal of the first switch control element 30 is also Other reference potential points can be connected, which is not limited here; wherein, the first switch control element further includes two switches, a first switch 301 and a third switch 302, and the first switch 301 includes a first terminal and a second terminal. The third switch 302 includes a first terminal, a second terminal, and a third terminal. The first terminal of the first switch 301 is connected to the first terminal of the third switch 302 as the first switch control element 30 Terminal 30A, the second terminal of the first switch 301 is used as the second terminal 30B of the first switch control element 30, and the third terminal of the first switch 301 and the third terminal of the third switch 302 are connected as the second terminal of the first switch control element 30 The first power terminal 30C and the second terminal of the third switch 302 serve as the fourth terminal 30D of the first switch control element 30. The first inductive coil 401 includes three ends, namely a first end 401A, a second end 401B, and a third end 401C. The first end 401A is a first tapped end and corresponds to all the turns of the entire coil; The end 401C is the second tapped end, which corresponds to the number of turns of the lower half of the coil. Similarly, the second switch control element 50 includes four terminals, namely a first terminal 50A, a second terminal 50B, a first power terminal 50C, and a fourth terminal 50D. In actual situations, the second switch control element 50 It also includes a second power terminal (not shown in the figure), and its second power terminal is usually a ground terminal, which is used in conjunction with the first power terminal 50C of the second switch control element 50. Of course, the second switch control element 50 The second power terminal can also be connected to other reference potential points, which are not limited here; wherein, the second switch control element 50 further includes two switches, a second switch 501 and a fourth switch 502, respectively, and the second switch 501 includes a One end, a second end and a third end. The fourth switch 502 includes a first end, a second end and a third end. The first end of the second switch 501 serves as the first end 50A of the second switch control element 50. The second end of the second switch 501 is connected to the second end of the fourth switch 502 as the second end 50B of the second switch control element 50, and the third end of the second switch 501 is connected to the third end of the fourth switch 502 as the first The first power terminal 50C of the second switch control element 50 and the first terminal of the fourth switch 502 serve as the fourth terminal 50D of the second switch control element 50. The second inductive coil 402 includes three ends, namely a first end 402A, a second end 402B, and a third end 402C. The first end 402A is a first tap end, corresponding to all the turns of the entire coil; The end 402C is the second tapped end, which corresponds to the number of turns of the lower half of the coil. The energy storage element 60 includes a first end 60A and a second end 60B.

[0061] Specifically, the first end 10A and the second end 10B of the first friction generator 10 are respectively connected to the first end 20A and the second end 20B of the first rectifier circuit 20. The third terminal 20C of the first rectifier circuit 20 is simultaneously connected to the first terminal of the first switch 301 and the first terminal of the third switch 302, and the fourth terminal 20D of the first rectifier circuit 20 is simultaneously connected to the first terminal of the first inductor 401. The two ends 401B are connected to the second end 402B of the second inductor 402. The second end of the first switch 301 is connected to the first end 401A of the first inductor 401, and the second end of the third switch 302 is connected to the third end 401C of the first inductor 401. The first end of the second switch 501 is connected to the first end 402A of the second inductance coil 402, and the first end of the fourth switch 502 is connected to the third end 402C of the second inductance coil 402. The second terminal of the second switch 501 and the second terminal of the fourth switch 502 are simultaneously connected to the first terminal 60A of the energy storage element 60. The second end 60B of the energy storage element 60 is connected to the second end 402B of the second inductor 402.

[0062] It should be noted that the first switch 301 and the third switch 302 further include a fourth terminal (not shown in the figure), and the fourth terminal of the first switch 301 and the fourth terminal of the third switch 302 are connected as the first switch The second power terminal of the control element 30 (not shown in the figure). Similarly, the second switch 501 and the fourth switch 502 further include a fourth terminal (not shown in the figure), and the fourth terminal of the second switch 501 and the fourth terminal of the fourth switch 502 are connected as the second switch control element 50. The second power supply terminal (not shown in the figure).

[0063] Figure 4 The circuit connection relationship shown is only a schematic connection relationship, and those skilled in the art can also make various flexible changes to the connection modes of some of the components, which is not limited by the present invention. For example, the first inductive coil 401 and the second inductive coil 402 may have multiple taps with different turns, such as three or four taps with different turns. Accordingly, the first switch control element 30 and the second switch control The element 50 also has a plurality of switches, such as three or four switches. In addition, similar to the first embodiment, the first switch control element 30 and the second switch control element 50 may also include a power supply terminal, which can be connected to the energy storage element 60 or a separate battery element.

[0064] The following describes the working principle of the energy storage device of the first embodiment in conjunction with the above-mentioned circuit connection relationship: wherein, the first friction generator 10 is used to convert the mechanical energy acting on it into electrical energy. The first rectifier circuit 20 is used for rectifying the electric energy output by the first friction generator 10. The first switch control element 30 is used for controlling the connection or disconnection of the first rectification circuit 20 and the first inductance coil 401 according to the electric energy value output by the first rectification circuit 20. Specifically, when the first switch control element 30 controls the first rectifier circuit 20 to be disconnected from the first inductance coil 401, it is sufficient to control both the first switch 301 and the third switch 302 to be in the off state. When the first switch control element 30 controls the first rectifier circuit 20 to communicate with the first inductance coil 401, it further controls the first switch 301 to open and the third switch 302 to close according to the magnitude of the electrical energy output by the first rectifier circuit 20; or , Control the first switch 301 to close and the third switch 302 to open. It should be noted that, under normal circumstances, as long as one of the first switch 301 and the third switch 302 is in the closed state, the other is bound to be in the open state, and generally, it will not happen that both are closed at the same time. The first inductive coil 401 is used to store the electrical energy output by the first rectifier circuit 20 when it is connected to the first rectifier circuit 20, wherein when the first switch 301 is closed, all coils of the first inductive coil 401 are in working state; When the third switch 302 is closed, the lower half of the first inductive coil 401 is in a working state. In addition, since the first inductance coil 401 and the second inductance coil 402 form a coupled inductance coil group, the electric energy stored in the first inductance coil 401 will gradually be transferred to the second inductance coil 402. The second switch control element 50 is configured to control the connection or disconnection between the second inductance coil 402 and the energy storage element 60 according to the electric energy value output by the second inductance coil 402. Specifically, when the second switch control element 50 controls the second inductance coil 402 to be disconnected from the energy storage element 60, it is sufficient to control both the second switch 501 and the fourth switch 502 to be in the off state. When the second switch control element 50 controls the second inductance coil 402 to communicate with the energy storage element 60, it further controls the second switch 501 to open and the fourth switch 502 to close according to the magnitude of the electrical energy output by the second inductance coil 402; or, Control the second switch 501 to close and the fourth switch 502 to open. Wherein, when the second switch 501 is closed, all the coils of the second inductance coil 402 are in the working state; when the fourth switch 502 is closed, the lower half of the coils of the second inductance coil 402 are in the working state. It should be noted that under normal circumstances, as long as one of the second switch 501 and the fourth switch 502 is in the closed state, the other switch must be in the open state, and generally, it will not happen that both are closed at the same time. The energy storage element 60 is connected to the second inductance coil 402 through the second switch control element 50 and is used to store the electric energy in the second inductance coil 402 when it is connected to the second inductance coil 402.

[0065] The working process of the energy storage device of the second embodiment specifically includes the following steps:

[0066] Step 1: When an external force acts on the first friction generator 10, the first friction generator 10 converts the mechanical energy acting on it into electrical energy, and passes through the first end 10A and the second end of the first friction generator 10 10B is output to the first rectifier circuit 20;

[0067] Step 2: After the first rectifier circuit 20 receives the above-mentioned electric energy through its first terminal 20A and second terminal 20B, it rectifies the electric energy and outputs it through its third terminal 20C and fourth terminal 20D;

[0068] Step 3: During the above steps 1 and 2, the first switch control element 30 monitors the electric energy value output by the first rectifier circuit 20 in real time. When the monitored electric energy value output by the first rectifier circuit 20 is greater than or equal to the preset value When the first connection threshold is set, one of the first switches in the first switch control element 30 switches from the normally open state to the closed state (that is, the first switch 301 switches from the normally open state to the closed state or the third switch 302 changes from The normally open state is switched to the closed state), so that the first rectifier circuit 20 is connected to the first inductive coil 401, so that the electric energy output by the first rectifier circuit 20 is stored in the first inductive coil 401; when the first rectifier is monitored When the electric energy value output by the circuit 20 is less than the preset first connection threshold, the first switch 301 and the third switch 302 in the first switch control element 30 are both kept in a normally open state, so that the first rectifier circuit 20 and the first The circuit between the inductor coils 401 is maintained in an open state.

[0069] Specifically, during the process in which the first rectifier circuit 20 is in communication with the first inductance coil 401, the first switch control element 30 further determines the first inductance coil in communication with the first rectifier circuit 20 according to the electric energy value output by the first rectifier circuit 20 The specific method for determining the number of turns of 401 is similar to that of the first embodiment, and will not be repeated here. For ease of understanding, similar to the first embodiment, it is still assumed that the power interval greater than or equal to the first connection threshold of 100V is divided into two first sub-intervals, namely "100V to 800V" (that is, the first The range of the sub-interval is greater than or equal to 100V and less than 800V) and "above 800V" (that is, the range of the first sub-interval is greater than or equal to 800V), where the first sub-interval of "100V to 800V" corresponds to the coil turns The number is N1, and the number of turns of the coil corresponding to the second sub-interval of "800V and above" is N2, N1 and N2 are all natural numbers, and N1 is less than N2. In specific implementation, when the first rectifier circuit 20 is just connected to the first inductance coil 401, the electric energy value output by the first rectifier circuit 20 may be in the first sub-interval of "100V to 800V". Therefore, at this time, the first The switch control element 30 controls the first switch 301 to open and the third switch 302 to close, so that the lower half of the first inductive coil 401 works, that is, between the third terminal 401C and the second terminal 401B of the first inductive coil 401 The coil is working, and the number of turns of the corresponding coil is N1. After the first rectifier circuit 20 is connected to the first inductance coil 401 for a period of time, the electric energy value output by the first rectifier circuit 20 may be in the first sub-interval of "800V or more". Therefore, at this time, the first switch control element 30 controls The first switch 301 is closed and the third switch 302 is opened, so that all the coils of the first inductance coil 401 work, that is, the coils between the first end 401A and the second end 401B of the first inductance coil 401 are turned on and work. When the corresponding coil turns is N2. In the above process, in order to avoid frequent switching of the number of turns of the first inductance coil 401 caused by the fluctuation of the electric energy value output by the first rectifier circuit 20 up and down 800V, the switching threshold can also be set by referring to the first embodiment. The number of coil turns is frequently switched due to small fluctuations in the value of the electric energy output by the first rectifier circuit 20.

[0070] Step 4: After receiving the electric energy output by the first rectifier circuit 20, the first inductive coil 401 stores the above electric energy. Since the first inductance coil 401 and the second inductance coil 402 form a coupled inductance coil group, the electric energy stored in the first inductance coil 401 is output to the second inductance coil 402 for storage. Preferably, as Figure 4 As shown, the first inductance coil 401 and the second inductance coil 402 are coupled with each other through the connection of different names, so as to increase the electric energy of the coupled inductance coil group formed by the first inductance coil 401 and the second inductance coil 402 Storage rate.

[0071] Step 5: During the above steps 1 to 4, the second switch control element 50 monitors the electric energy value output by the second inductance coil 402 in real time. If the electric energy value output by the second inductance coil 402 is greater than or equal to the preset second Connecting threshold, the second switching control element 50 connects the second inductance coil 402 with the energy storage element 60, so that the electric energy output by the second inductance coil 402 is stored in the energy storage element 60; if the electric energy output by the second inductance coil 402 is Less than the second connection threshold, the second switching control element 50 disconnects the second inductance coil 402 from the energy storage element 60.

[0072] Specifically, during the process in which the second inductive coil 402 is connected to the energy storage element 60, the second switching control element 50 further determines the electrical energy value of the second inductive coil 402 connected to the energy storage element 60 according to the value of the electric energy output by the second inductive coil 402. Number of turns. Specifically, when determining the number of turns of the second inductive coil 402, similar to the first embodiment, at least one of the following two implementation manners can also be flexibly selected:

[0073] The first implementation method is similar to step 3. The power interval that is greater than or equal to the preset second connection threshold can be divided into multiple second sub-intervals, and a corresponding second inductance coil is provided for each second sub-interval. The number of turns of 402, where each second sub-interval corresponds to a different number of turns of the second inductive coil 402. Correspondingly, the number of turns of the corresponding second inductance coil 402 is determined according to the second sub-interval to which the electric energy value in the second inductance coil 402 belongs. In addition, in order to avoid the problem of frequent switching between the number of turns corresponding to multiple sub-intervals caused by the fluctuation of the electric energy value of the second inductive coil 402, a switching threshold can be preset, when the electric energy value of the second inductive coil 402 belongs to When the interval range of is changed from one of the second sub-intervals (ie: the current sub-interval) to another adjacent second sub-interval (ie: the changed sub-interval), the current electric energy value of the second inductor 402 needs to be changed It is compared with the interval threshold between the current sub-interval and the changed sub-interval, and only when the difference between the two is greater than the preset switching threshold, the number of turns of the second inductive coil 402 is correspondingly switched to another phase The number of turns corresponding to the adjacent subinterval.

[0074] Specific to Figure 4 , The power interval greater than or equal to the second connection threshold 100V is divided into two second sub-intervals, namely "100V to 800V" (that is, the range of the second sub-interval is greater than or equal to 100V and Less than 800V) and "above 800V" (that is, the range of the second sub-interval is greater than or equal to 800V), where the number of coil turns corresponding to the second sub-interval of "100V to 800V" is N1', "800V or more" The number of turns of the coil corresponding to the second sub-interval is N2', N1' and N2' are both natural numbers, and N1' is smaller than N2'. In specific implementation, when the second inductive coil 402 is just connected to the energy storage element 60, the electric energy value output by the second inductive coil 402 may be in the second sub-interval of "100V to 800V". Therefore, at this time, the second switch The control element 50 controls the second switch 501 to open and the fourth switch 502 to close, so that the lower half of the second inductive coil 402 works, that is, between the third end 402C and the second end 402B of the second switch control element 50 The coil is working, and the number of turns of the corresponding coil is N1'. After the second inductance coil 402 is connected to the energy storage element 60 for a period of time, the electric energy value output by the second inductance coil 402 may be in the second sub-interval of "800V or more". Therefore, at this time, the second switch control element 50 controls the first The second switch 501 is closed and the fourth switch 502 is opened, so that all the coils of the second inductance coil 402 work, that is, the coils between the first end 402A and the second end 402B of the second switch control element 50 are turned on and work, At this time, the corresponding number of turns of the coil is N2'. In the above process, in order to avoid frequent switching of the number of turns of the second inductance coil 402 caused by the fluctuation of the electric energy value output by the second inductance coil 402 up and down 800V, the switching threshold can also be set by referring to the first embodiment to avoid The number of turns of the coil is frequently switched due to small fluctuations in the electric energy value output by the second inductive coil 402.

[0075] In the above example, the interval threshold used to divide the second subinterval is the same as the interval threshold used to divide the first subinterval, and both are 800V. In actual situations, considering the transmission loss inside the coupled inductor, the interval threshold for dividing the second subinterval may also be slightly lower than the interval threshold for dividing the first subinterval, for example, set to 750V. Moreover, the interval threshold can be either a point value or a range.

[0076] It can be seen that, in the above-mentioned first implementation manner, the magnitude of the electric energy value of the second inductance coil 402 is monitored, and the number of turns of the second inductance coil 402 is set according to a preset corresponding relationship. In the second implementation manner, the corresponding relationship between the number of turns of the first inductance coil 401 and the number of turns of the second inductance coil 402 corresponding to each first sub-interval can also be preset, according to the first rectifier The number of turns of the first inductor 401 connected by the circuit 20 determines the number of turns of the corresponding second inductor 402. For example, suppose in step 3 that the interval threshold of 800V is still used to divide the electric energy interval greater than or equal to the first connection threshold of 100V into two first subintervals, namely "100V to 800V" (that is, the range of the first subinterval is Greater than or equal to 100V and less than 800V) and "above 800V" (that is, the range of the first sub-interval is greater than or equal to 800V), where the first inductance coil 401 corresponding to the first sub-interval of "100V to 800V" The number of turns is N1, and the number of turns of the corresponding second inductive coil 402 is N1'; the number of turns of the first inductive coil 401 corresponding to the first sub-interval of "800V and above" is N2, and the corresponding second inductive coil The number of turns of 402 is N2'. In other words, the matching relationship between the number of turns of the first inductance coil 401 and the number of turns of the second inductance coil 402 is preset. When the number of turns of the first inductance coil 401 is N1, the number of turns of the second inductance coil 402 must be Is N1'; when the number of turns of the first inductive coil 401 is N2, the number of turns of the second inductive coil 402 must be N2'. According to preset calculations and experiments, the best matching relationship between the number of turns of the first inductive coil 401 and the number of turns of the second inductive coil 402 can be determined, which can simplify the adjustment of the number of turns of the second inductive coil 402 The process can improve the impedance matching effect. That is, in the second implementation manner, the first switch 301 and the second switch 501 constitute a group of switches, and the third switch 302 and the fourth switch 502 constitute another group of switches. When the first switch 301 is closed, the second inductance coil 402 must be turned on by closing the second switch 501; when the third switch 302 is closed, the second inductance coil must be turned on by closing the fourth switch 502 402. Of course, the above two implementation modes can be used alone or in combination, which is not limited in the present invention. In addition, a separate control module can also be used to simultaneously monitor the electrical energy values ​​in the first rectifier circuit 20 and the second inductance coil 402, and control the first switch 301 and the second switch 501, and the third switch 302 and the fourth switch at the same time. Switch 502 on and off.

[0077] It should be understood that the above steps 1 to 5 are a cyclical process, so that the function of supplementing power supply for the energy storage element 60 is realized, which makes up for the loss of the energy storage element 60 providing electric energy to the outside, thereby extending the entire energy storage. The service life of the device.

[0078] Embodiment three

[0079] Figure 5 Shows a structural diagram of an energy storage device based on a friction generator provided in the third embodiment of the present invention, such as Figure 5 As shown, the energy storage device includes: a first friction generator 10, a first rectifier circuit 20, a first switching control element 30, a first inductive coil 401, a second inductive coil 402, a second switching control element 50, and energy storage The element 60, the second friction generator 70 and the second rectifier circuit 80. It can be seen that, on the basis of the first embodiment, the third embodiment further adds a second friction generator 70 and a second rectifier module 80. Other than that, the remaining parts of the third embodiment are the same as those of the first embodiment. Only the different parts of the third embodiment and the first embodiment will be described, and the same parts will not be repeated here.

[0080] The second friction generator 70 includes two ends, a first end 70A and a second end 70B, respectively. The second rectifier module 80 includes four ends, namely a first end 80A, a second end 80B, a third end 80C, and a fourth end 80D. Specifically, the first end 70A and the second end 70B of the second friction generator 70 are respectively connected to the first end 80A and the second end 80B of the second rectification module 80, and are used to convert the mechanical energy acting on it into The electric energy is output to the second rectifier module 80. The third end 80C and the fourth end 80D of the second rectification module 80 are respectively connected to the first end 60A and the second end 60B of the energy storage element 60, and are used to rectify the electric energy output by the second friction generator 70, Thus, the energy storage element 60 is provided with electrical energy.

[0081] In the third embodiment, the reason why the second friction generator 70 and the second rectifier module 80 are provided is to prevent the remaining electric energy in the energy storage element 60 from being insufficient to drive the first switch control element 30 and/or the second switch control element 50 , Resulting in the first switching control element 30 being unable to monitor the electrical energy value output by the first rectifier circuit 20 and/or the second switching control element 50 being unable to monitor the electrical energy value output by the second inductor 402, that is, when the energy storage When the remaining electric energy in the element 60 is small, the mechanical energy acting on it can be converted into electric energy by the second friction generator 70, and the second rectifier module 80 is rectified to provide electric energy for the energy storage element 60 , And then provide electric energy for the first switch control element 30 and/or the second switch control element 50 to ensure the normal operation of the entire energy storage device.

[0082] In addition, in Figure 5 In the third embodiment shown, the first inductance coil 401 and the second inductance coil 402 are the same as in the first embodiment, and both are sliding-tap coils. When the sliding taps are slid to different positions, they correspond to different coil turns. Correspondingly, the first switching control element 30 further includes: a first sliding adjustment module connected to the sliding tap of the first inductance coil 401, and the first switching control element 401 controls the communication with the first rectifier circuit 20 by controlling the first sliding adjustment module. The number of turns of the connected first inductive coil 401; and/or, the second switching control element 50 further includes: a second sliding adjustment module connected to the sliding tap of the second inductive coil 402, the second switching control element 50 controls the first The second sliding adjustment module controls the number of turns of the second inductance coil 402 connected with the energy storage element 60.

[0083] In specific implementation, the first switching control element, the first inductance coil, the second inductance coil, and the second switching control element in the third embodiment can also be the same as those in the second embodiment, wherein the first inductance coil and the second inductance coil They are all multi-tap coils, and each tap corresponds to a different number of coil turns. Correspondingly, the first switch control element further includes: a plurality of switches, each switch is respectively connected to a tap in the first inductance coil, the first switch control element controls the first inductance coil and the Connecting or disconnecting the first rectifier circuit, and controlling the number of turns of the first inductance coil connected with the first rectifier circuit; and/or, the second switch control element further includes: a plurality of switches, each of which is connected to the second One tap of the inductance coil is connected, and the second switch control element controls the connection or disconnection of the second inductance coil and the energy storage element by controlling the on and off of a plurality of switches, and controls the connection or disconnection of the second inductance coil connected to the energy storage element. Number of turns.

[0084] In addition, those skilled in the art can also make various flexible changes and modifications to each of the foregoing embodiments. For example, in the above-mentioned embodiment, the first switching control element integrates monitoring and on-off functions, that is, it is necessary to monitor the electric energy value output by the first rectifier circuit and also according to the monitored electric energy value output by the first rectifier circuit. Perform opening or closing. In other embodiments of the present invention, the first switch control element can also be realized by a simple switch circuit. In this case, a switch controller can be additionally provided, and the switch controller is responsible for monitoring the electric energy value output by the first rectifier circuit. And according to the monitored electric energy value output by the first rectifier circuit, the on-off of the first switch control element is controlled. The switch controller can select multiple power supply modes such as power storage element and/or battery element. Similarly, the second switch control element can also be realized by a simple switch circuit. The switch controller is responsible for monitoring the electric energy value in the coupled inductor coil group, and controls the on and off of the second switch control element according to the monitoring result. At this time, two switch controllers can be set to control the first switch control element and the second switch control element respectively, or one switch controller can be set to control the first switch control element and the second switch control element at the same time. When only one switch controller is set, only one switch controller needs to be powered, which can save power consumption; when two switch controllers are set, the two switch controllers can also adopt the active/standby mode, that is, the main The switch controller controls the first switch control element and the second switch control element at the same time, and when the main switch controller fails or has no power, the standby switch controller controls the first switch control element and the second switch control element, thereby Improve the durability of the energy storage device.

[0085] In addition, in each of the above-mentioned embodiments, the on-off of the first switch control element can be completely dependent on the electrical energy value output by the first rectifier circuit, that is: real-time monitoring of the electrical energy value output by the first rectifier circuit, as long as the monitored first The electrical energy value output by the rectifier circuit is less than the first connection threshold value, and then it is turned off, and if it is greater than or equal to the first connection threshold value, it is closed. At this time, the internal control logic of the first switching control element is: It is disconnected at a connection threshold, and closed when the electric energy value output by the first rectifier circuit is greater than or equal to the first connection threshold. In addition, the first switch control element can also be implemented by a normally open switch, that is, the first switch control element is in the off state by default, and only when the monitored electric energy value of the first rectifier circuit is greater than or equal to all It turns to the closed state at the first connection threshold. At this time, since the first switch control element is in the open state by default, its internal control logic is: when the electrical energy value output by the first rectifier circuit is greater than or equal to the first It is closed when the connection threshold is reached. Similarly, the first switch control element can also be realized by a normally closed switch, that is, the first switch control element is closed by default, and only when the monitored electric energy value of the first rectifier circuit is less than the first connection threshold At this time, since the first switch control element is in the closed state by default, its internal control logic is: when the electric energy value in the output of the first rectifier circuit is less than the first connection threshold, it will be disconnected. In short, those skilled in the art can flexibly adjust the specific implementation details of the first switch control element. Similarly, the second switch control element can also be implemented in a variety of ways accordingly, which will not be repeated here.

[0086] In each of the above embodiments, the energy storage element can be various types of energy storage elements such as electrolytic capacitors, graphene supercapacitors, ceramic capacitors, etc. The present invention does not limit the specific form of the energy storage elements, and all elements that can store electrical energy are It can be applied to the present invention.

[0087] In addition, in each of the above-mentioned embodiments, both the first friction generator and the second friction generator can be realized in various forms, and the three-layer structure friction generator, the four-layer structure friction generator, and the five-layer intermediate friction generator can be flexibly selected. For the friction generator with a thin film structure or a five-layer intermediate electrode structure, the present invention does not limit the specific form of the friction generator, as long as the effect of friction electrification can be achieved.

[0088] Among them, the number of friction generators can be one or multiple; when multiple first friction generators are used, the multiple first friction generators are connected in series and/or parallel, and there are many The first friction generators can be arranged not only in a flat manner, but also in a layered manner, and can also be arranged in a combined manner of layering and flat. There is no limitation here, and those skilled in the art can Choose according to your needs. Similarly, the number and arrangement of the second friction generators can also be selected with reference to the above description of the first friction generators.

[0089] In order to facilitate understanding, the following briefly introduces the specific structures of several alternative friction generators through a few examples: