Circuit for accelerating reaction rate of aluminum-air battery

Abstract

The utility model discloses a circuit for accelerating the reaction rate of an aluminum-air battery. The circuit comprises a boosting module and a plurality of groups of delay control circuits connected in parallel, the delay control circuit comprises a delay module, a comparison circuit and an AND gate module which are sequentially connected in series; the delay control circuits are connected to the corresponding load driving circuits; each load corresponds to a group of delay control circuits, and the delays of the plurality of delay control circuits are in a progressive relationship; the circuit breaker also comprises a circuit break time-delay control module. A delay module of the open-circuit delay control module is connected to a boost module, and the output end of the open-circuit delay control module is connected to the input end of an AND gate module of each delay control circuit after being connected with a comparison circuit; and under the condition that the plurality of groups of parallel delay control circuits sequentially output high levels, the plurality of load driving circuits are sequentially switched on, so that the plurality of loads are sequentially connected into an aluminum-air battery discharge loop. According to the scheme, the electrochemical reaction time of the aluminum-air battery is shortened, the load action time is controllable, and the load can be cut off after the rated output power is reached, so that resource waste is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum-air battery application, and in particular relates to a circuit for accelerating the reaction rate of an aluminum-air battery. Background Art

[0002] Aluminum-air battery is a chemical power source with aluminum as the negative electrode and oxygen as the positive electrode. The battery has the advantages of large specific energy, light weight, non-toxic and dangerous, abundant aluminum raw materials and easy recycling. In addition, because it uses low-cost manganese oxide catalysts and does not require proton exchange membranes, the cost of aluminum-air battery stacks can be reduced by about 40%. At the same time, the cost of aluminum-air battery systems is about 82% of that of hydrogen fuel cell systems. Under normal temperature and pressure conditions, the output of aluminum-air batteries needs to go through a long electrochemical reaction process before reaching the rated power, resulting in a slow increase in the discharge power of aluminum-air batteries and a poor user experience.

[0003] The existing scheme to speed up the reaction rate of aluminum-air batteries usually directly adds a fixed resistance load at both ends of the aluminum-air battery stack. This scheme can help the battery speed up the reaction and thus increase the output power, shortening the time required to reach the rated output power. However, there are two disadvantages in the existing scheme: First, the acceleration effect is not maximized. In the initial stage, adding a fixed load will significantly speed up the reaction rate of the aluminum-air battery, but as the output power of the aluminum-air battery stack increases, the effect of the fixed load on accelerating the reaction will decrease; second, the added fixed load is in working condition throughout the entire process from startup to the end of the aluminum-air battery reaction, which will consume the energy of the aluminum-air battery and cause some energy waste. Summary of the invention

[0004] 1. Technical problems to be solved:

[0005] In response to the above technical problems, the present invention provides a circuit for accelerating the reaction rate of aluminum-air batteries, which fully shortens the electrochemical reaction time of aluminum-air batteries and realizes the controllability of the load action time. After reaching the rated output power, the load can be cut off to avoid wasting resources.

[0006] 2. Technical solution:

[0007] A circuit for accelerating the reaction rate of an aluminum-air battery, connected between the aluminum-air battery and multiple loads to realize power supply to the multiple loads, characterized in that: it comprises a boost module, multiple groups of delay control circuits connected in parallel; each delay control circuit comprises a delay module, a comparison circuit and an AND gate module connected in series in sequence; the input end of the boost module is connected to the output end of the aluminum-air battery, and the output end is connected to multiple groups of delay control circuits connected in parallel, each group of delay control circuits is respectively connected to a corresponding load drive circuit, so as to realize on-off control of the drive circuit; each group of delay control circuits is used to control the time point when the corresponding load is connected to the discharge circuit, and the delays of the multiple groups of delay control circuits are in a progressive relationship;

[0008] It also includes a circuit-breaking delay control module; the delay module input end of the circuit-breaking delay control module is connected to the output end of the boost module, and after the output end is connected to the comparison circuit, the output end of the comparison circuit is connected to the input end of the AND gate module of each delay control circuit, so as to directly control the output of the AND gate module and indirectly control the disconnection time point of the load; when the delay function of the circuit-breaking delay control module is not triggered and multiple groups of parallel delay control circuits output high levels in turn, multiple load driving circuits are turned on in turn, so that multiple loads are connected to the aluminum-air battery discharge circuit in turn.

[0009] Furthermore, the boost module comprises a resistor R2 and a resistor R3 connected in series; one end of the resistors R2 and R3 connected in series is connected to the output end of the aluminum-air battery, and the other end is grounded; the node where the resistors R2 and R3 are connected serves as a reference voltage output end of the boost module.

[0010] Furthermore, the delay control circuit includes a voltage-dividing resistor R1, a capacitor C1, a comparator U1, and an AND gate U5; wherein the voltage-dividing resistor R1 and the capacitor C1 are connected in series to form an RC series circuit, the resistor input end of the circuit is connected to the power supply or the output of the comparator of the previous delay control circuit, and the output end is connected to the non-inverting input end of the comparator U1; the inverting input end of the comparator U1 is connected to the output end of the boost module; the output end of the comparator U1 is connected to an input end of the AND gate U5.

[0011] Furthermore, the circuit-breaking delay control module includes a comparator Un; the non-inverting input of the comparator Un is connected to the output of the boost module; the inverting input of the comparator Un is connected to the output of the RC series circuit of the last group of delay control circuits; and the output of the comparator Un is connected to another input of the AND gate U5 of all delay control circuits.

[0012] Furthermore, the load driving circuit includes a MOS transistor Q1; the output end of the AND gate U5 is connected to the gate of the MOS transistor Q1; the drain of the MOS transistor Q1 is connected to the output end of the boost module, and the source is connected to the corresponding load RF.

[0013] 3. Beneficial effects:

[0014] (1) The utility model provides a circuit for accelerating the reaction rate of an aluminum-air battery, comprising an aluminum-air battery stack, a boost module, and a plurality of parallel delay control circuits connected in sequence; through a comparison circuit and an AND gate circuit of the delay control circuit, when the delay modules of the plurality of parallel delay control circuits are charged to a voltage higher than a reference voltage, the output ends of the plurality of AND gate logic modules sequentially output high levels; and the plurality of the driving modules are sequentially turned on so that the plurality of the loads are sequentially connected to the aluminum-air battery discharge circuit.

[0015] (2) The utility model can change the added load size at different stages of the aluminum-air battery reaction and control the load action time to maximize the shortening of the electrochemical reaction process of the aluminum-air battery and shorten the waiting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a specific embodiment;

[0017] Figure 2 A specific circuit diagram of a specific embodiment. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings.

[0019] A circuit for accelerating the reaction rate of an aluminum-air battery, connected between the aluminum-air battery and multiple loads to realize power supply to the multiple loads, characterized in that: it includes a boost module, multiple groups of delay control circuits connected in parallel; each delay control circuit includes a delay module, a comparison circuit and an AND gate module connected in series in sequence; the input end of the boost module is connected to the output end of the aluminum-air battery, and the output end is connected to multiple groups of delay control circuits connected in parallel, each group of delay control circuits is respectively connected to a corresponding load drive circuit, so as to realize on-off control of the drive circuit; each group of delay control circuits is used to control the time point when the corresponding load is connected to a discharge circuit, and the delays of the multiple groups of delay control circuits are in a progressive relationship.

[0020] It also includes a circuit-breaking delay control module; the delay module input end of the circuit-breaking delay control module is connected to the output end of the boost module, and after the output end is connected to the comparison circuit, the output end of the comparison circuit is connected to the input end of the AND gate module of each delay control circuit, so as to directly control the output of the AND gate module and indirectly control the disconnection time point of the load; when the delay function of the circuit-breaking delay control module is not triggered and multiple groups of parallel delay control circuits output high levels in turn, multiple load driving circuits are turned on in turn, so that multiple loads are connected to the aluminum-air battery discharge circuit in turn.

[0021] Furthermore, the boost module comprises a resistor R2 and a resistor R3 connected in series; one end of the resistors R2 and R3 connected in series is connected to the output end of the aluminum-air battery, and the other end is grounded; the node where the resistors R2 and R3 are connected serves as a reference voltage output end of the boost module.

[0022] Furthermore, the delay control circuit includes a voltage-dividing resistor R1, a capacitor C1, a comparator U1, and an AND gate U5; wherein the voltage-dividing resistor R1 and the capacitor C1 are connected in series to form an RC series circuit, the resistor input end of the circuit is connected to the power supply or the output of the comparator of the previous delay control circuit, and the output end is connected to the non-inverting input end of the comparator U1; the inverting input end of the comparator U1 is connected to the output end of the boost module; the output end of the comparator U1 is connected to an input end of the AND gate U5.

[0023] Furthermore, the circuit-breaking delay control module includes a comparator Un; the non-inverting input of the comparator Un is connected to the output of the boost module; the inverting input of the comparator Un is connected to the output of the RC series circuit of the last group of delay control circuits; and the output of the comparator Un is connected to another input of the AND gate U5 of all delay control circuits.

[0024] Furthermore, the load driving circuit includes a MOS transistor Q1; the output end of the AND gate U5 is connected to the gate of the MOS transistor Q1; the drain of the MOS transistor Q1 is connected to the output end of the boost module, and the source is connected to the corresponding load RF. Specific embodiment:

[0026] As attached Figure 1 As shown, in this embodiment, the plurality of parallel delay control circuits are three groups, and the disconnection delay control module includes a comparator Un where n is 4. The specific circuit is shown in the attached Figure 2 As shown, the circuit composed of resistor R1, capacitor C1, comparator U1, and AND gate U5 is the first group of delay control circuits; the circuit composed of resistor R4, capacitor C2, comparator U2, and AND gate U6 is the second group of delay control circuits; the circuit composed of resistor R5, capacitor C3, comparator U3, and AND gate U7 is the third group of delay control circuits. The circuit composed of resistor R6, capacitor C4, and comparator U4 is a disconnection delay control module. The voltage of the aluminum-air battery stack is output as Vdd through the DCDC circuit, and Vdd is divided into Vref through the second resistor R2 and the third resistor R3. Vref is used as the inverting input terminal of the comparator of each group of delay control circuits, and the input of the same-phase input terminal of the comparator U4 of the disconnection delay control module, providing a comparison reference.

[0027] When the aluminum-air battery reacts, after a certain proportion of salt water is added, the membrane acts as the anode and the composite material acts as the cathode to produce a chemical reaction to generate current. During the entire reaction process, the main participants are aluminum and water, and the final product is aluminum hydroxide.

[0028] As attached Figure 2 As shown, in this embodiment, a MOS tube is used as the driver of the load circuit, and the output signal is used to control the load driving circuit according to a preset logic to turn the load on and off.

[0029] As attached Figure 1 In the delay control circuit, when salt water is added, the delay control circuit corresponding to the first load starts to work, that is, the first delay module works and the first load starts to work; when the first load starts to work, the first delay module works, and after time t1, the second load works; when the second load starts to work, the second delay module works, and after time t2, the third load starts to work. After the third load starts to work, the disconnection delay module starts to work, and after the delay time t3, the circuits of the first load, the second load and the third load are disconnected at the same time and stop working. It can be seen from the above process that the delays of the above three groups of delay control circuits are in a progressive relationship; the delay time of the first group is very short, about a few seconds. The time input point of the second group of delays is the output point of the first delay. The time input point of the third delay is the output point of the second delay.

[0030] The circuits corresponding to the resistor R1, the capacitor C1, the comparator U1 and the gate U5 are the first group of delay control circuits, which respectively control the delay time of the resistor RF1 connecting to the aluminum-air battery discharge circuit; this delay time is very short, about a few seconds.

[0031] The circuit composed of resistor R4, capacitor C2, comparator U2 and AND gate U6 controls the delay time t1 of resistor RF2 being connected to the discharge loop of the aluminum-air battery.

[0032] The circuit composed of resistor R5, capacitor C3, comparator U3 and AND gate U7 controls the delay time t2 of resistor RF3 being connected to the discharge loop of the aluminum-air battery.

[0033] From the above analysis, it can be seen that the delay time and the working time of the load can be changed by adjusting the corresponding resistance and capacitance parameters.

[0034] Before the capacitor C4 starts to charge or is charged to the reference voltage Vref, the output of the comparator U4 is high level, and the inputs of one end of the AND gate U5, AND gate U6 and AND gate U7 are all high level. In this way, its output depends on the output of the corresponding comparator in the previous section. Therefore, at the moment when the aluminum-air battery stack starts to work, the capacitor C1 is briefly charged to a voltage higher than the voltage of the inverting input terminal of the comparator U1 through the resistor R1, and the output of the comparator U1 is high level. After passing through the AND gate U5, the output is high level, the MOS tube Q1 is turned on, and the resistor RF1 (as a load) is connected to the loop and starts to work. When the output of the comparator U1 is high level (the seventh resistor RF1 starts to work), the capacitor C2 is charged through the fourth resistor R4, and after t1 time, it is charged to Vref. After that, the output of the comparator U2 is high level, and after passing through the AND gate U6, the output is still high level, the MOS tube Q2 is turned on, and the resistor RF2 (as a load) works, that is, after the resistor RF1 starts to work for t1 time, the resistor RF2 is connected to the aluminum-air battery discharge loop and starts to work.

[0035] The time for capacitor C3 to charge to Vref is t2. Similarly, after resistor RF2 works for time t2, resistor RF3 (as load) starts to work.

[0036] When the comparator U3 outputs a high level (resistor RF3 starts working), capacitor C4 is charged through resistor R6. After the charging voltage is higher than Vref, the comparator U4 outputs a low level. At this time, the outputs of one end of the rear-end AND gates U5, U6 and U7 all become low levels. The outputs of AND gates U5, U6 and U7 are all low levels. MOS tubes Q1, Q2 and Q3 are all cut off, and resistors RF1, RF2 and RF3 (as loads) all stop working.

[0037] Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims of this application.

Claims

1. A circuit for accelerating the reaction rate of an aluminum-air battery, connected between the aluminum-air battery and multiple loads to realize power supply to multiple loads, characterized in that: It includes a boost module and multiple parallel delay control circuits; each delay control circuit includes a delay module, a comparison circuit and an AND gate module connected in series in sequence; the input end of the boost module is connected to the output end of the aluminum-air battery, and the output end is connected to multiple parallel delay control circuits, each delay control circuit is respectively connected to a corresponding load drive circuit, so as to realize the on-off control of the drive circuit; each delay control circuit is used to control the time point when the corresponding load is connected to the discharge circuit, and the delay of multiple delay control circuits is in a progressive relationship; It also includes a circuit-breaking delay control module; the delay module input end of the circuit-breaking delay control module is connected to the output end of the boost module, and after the output end is connected to the comparison circuit, the output end of the comparison circuit is connected to the input end of the AND gate module of each delay control circuit, so as to directly control the output of the AND gate module and indirectly control the disconnection time point of the load; when the delay function of the circuit-breaking delay control module is not triggered and multiple groups of parallel delay control circuits output high levels in turn, multiple load driving circuits are turned on in turn, so that multiple loads are connected to the aluminum-air battery discharge circuit in turn.

2. The circuit for accelerating the reaction rate of an aluminum-air battery according to claim 1, characterized in that: The boost module comprises a resistor R2 and a resistor R3 connected in series; one end of the resistors R2 and R3 connected in series is connected to the output end of the aluminum-air battery, and the other end is grounded; the node where the resistors R2 and R3 are connected serves as the reference voltage output end of the boost module.

3. The circuit for accelerating the reaction rate of an aluminum-air battery according to claim 1, characterized in that: The delay control circuit includes a voltage-dividing resistor R1, a capacitor C1, a comparator U1, and an AND gate U5; wherein the voltage-dividing resistor R1 and the capacitor C1 are connected in series to form an RC series circuit, the resistor input end of the circuit is connected to the power supply or the output of the comparator of the previous delay control circuit, and the output end is connected to the non-inverting input end of the comparator U1; the inverting input end of the comparator U1 is connected to the output end of the boost module; the output end of the comparator U1 is connected to an input end of the AND gate U5.

4. The circuit for accelerating the reaction rate of an aluminum-air battery according to claim 3, characterized in that: The disconnection delay control module includes a comparator Un; the non-inverting input end of the comparator Un is connected to the output end of the boost module; the inverting input end of the comparator Un is connected to the output end of the RC series circuit of the last group of delay control circuits; the output end of the comparator Un is connected to the other input end of the AND gate U5 of all delay control circuits.

5. The circuit for accelerating the reaction rate of an aluminum-air battery according to claim 4, characterized in that: The load driving circuit includes a MOS transistor Q1; the output end of the AND gate U5 is connected to the gate of the MOS transistor Q1; the drain of the MOS transistor Q1 is connected to the output end of the boost module, and the source is connected to the corresponding load RF.

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