Charging and discharging system and vehicle

Abstract

The invention relates to a charging and discharging system and a vehicle, and the charging and discharging system comprises a first charging circuit which is connected between power generation equipment of the charging and discharging system and a first battery; a first discharge circuit, wherein the second discharge circuit is connected between load equipment and the power generation equipment; and the first discharging circuit outputs the electric energy of the load equipment to the power generation equipment. The charging and discharging system provided by the invention can generate power for the power generation equipment through the load equipment, so that the utilization rate of the load equipment is improved.

Description

Technical Field

[0001] This disclosure relates to the technical field of charge and discharge control, and more specifically, to a charge and discharge system and a vehicle. Background Technology

[0002] With the rapid development of battery charging and discharging technology, batteries can supply power to load devices, and power generation devices can also charge batteries. In existing technologies, when power generation devices fail due to factors such as low temperature or lack of starting voltage, simply discharging the battery to power the device to enable it to operate normally has significant limitations. Summary of the Invention

[0003] One object of this disclosure is to provide a charging and discharging system and a vehicle.

[0004] According to a first aspect of this disclosure, a charging and discharging system is provided, the charging and discharging system comprising:

[0005] A first charging circuit is connected between the power generation equipment and the first battery of the charging and discharging system.

[0006] A first discharge circuit is connected between the load device and the power generation device; the first discharge circuit outputs electrical energy from the load device to the power generation device.

[0007] Optionally, the load device is equipped with a second battery.

[0008] Optionally, the charging and discharging system further includes a second discharging circuit, which is connected between the load device of the charging and discharging system and the first battery.

[0009] Optionally, the first charging circuit includes a transformer, and the first discharging circuit includes a first mutual inductance coil.

[0010] The first charging circuit and the first discharging circuit share a first conversion circuit. The first conversion circuit includes a first bridge arm and a second bridge arm. The connection point of the first bridge arm and the second bridge arm is connected to the power generation equipment. The midpoint of the first bridge arm is connected to the first end of the first winding of the transformer and the first end of the first mutual inductance coil, respectively. The midpoint of the second bridge arm is connected to the second end of the first winding of the transformer and the second end of the first mutual inductance coil, respectively.

[0011] Optionally, the first charging circuit further includes a first switch, and the first discharging circuit further includes a second switch.

[0012] The first switch is disposed between the first conversion circuit and the first mutual inductance coil, and the second switch is disposed between the first conversion circuit and the first winding of the transformer;

[0013] The charging and discharging system further includes a control circuit, wherein the first switch, the second switch, and the first switching circuit are controlled by the control circuit.

[0014] In the event of a power generation failure, the control circuit is configured to control the first switch to close and the second switch to open; the control circuit is also configured to control the first conversion circuit to convert the first alternating current output by the first mutual inductance coil into a second direct current; wherein the first alternating current is obtained by converting the first direct current output by the second battery configured in the load device after the first mutual inductance coil has mutual inductance with the second mutual inductance coil of the load device.

[0015] Optionally, the second discharge circuit and the first discharge circuit share the first mutual inductance coil, the first discharge circuit further includes a third switch, and the first charging circuit further includes a transformer, a fourth switch, and a second conversion circuit.

[0016] The third switch is disposed between the second winding of the transformer and the first mutual inductance coil, and the fourth switch is disposed between the second winding of the transformer and the second conversion circuit;

[0017] The charging and discharging system further includes a control circuit, and the third switch, the fourth switch and the second conversion circuit are controlled by the control circuit.

[0018] In the event of a power generation failure, the control circuit is configured to disconnect the third and fourth switches.

[0019] Optionally, the second conversion circuit includes a third bridge arm and a fourth bridge arm, the connection point of the third bridge arm and the fourth bridge arm is connected to the first battery, the midpoint of the third bridge arm is connected to the first end of the second winding of the transformer, and the midpoint of the fourth bridge arm is connected to the second end of the second winding of the transformer.

[0020] According to a second aspect of this disclosure, a vehicle is also provided, the vehicle including a power generation device, a load device, a first battery, and a charging and discharging system, the charging and discharging system being the charging and discharging system described in the first aspect.

[0021] Optionally, the first charging circuit of the charging and discharging system includes a first conversion circuit, a second conversion circuit, a transformer, a second switch, and a fourth switch; the first discharging circuit of the charging and discharging system includes a first mutual inductance coil, a first switch, and a first conversion circuit; and the second discharging circuit of the charging and discharging system includes a second conversion circuit, a third switch, and a first mutual inductance coil.

[0022] The vehicle has at least one of a battery charging mode, a first battery discharging mode, and a first load discharging mode;

[0023] In the battery charging mode, the control circuit of the charging and discharging system controls the second switch and the fourth switch to close, controls the first switch and the third switch to open, and controls the first conversion circuit and the second conversion circuit to convert the third DC power output by the power generation equipment into a fourth DC power output to the first battery, so as to charge the first battery.

[0024] In the first battery discharge mode, the control circuit of the charging and discharging system controls the third switch to close, controls the first switch, the second switch and the fourth switch to open, and controls the second conversion circuit to convert the fifth DC power output from the first battery into the second AC power output to the first mutual inductor coil, so that the second mutual inductor coil of the load device is mutually inducted with the first mutual inductor coil, so as to charge the load device.

[0025] In the first load discharge mode, the control circuit of the charging and discharging system controls the first switch to close, controls the second switch, the third switch and the fourth switch to open, and controls the first conversion circuit to convert the first AC power output from the first mutual inductance coil into the second DC power output to the power generation equipment.

[0026] Optionally, the vehicle also has a second load discharge mode;

[0027] In the second load discharge mode, the control circuit of the charging and discharging system controls the third switch to close, controls the first switch, the second switch and the fourth switch to open, and controls the second conversion circuit to convert the first AC power output from the first mutual inductance coil into a third DC power output to the first battery, so as to charge the first battery.

[0028] Optionally, the vehicle also has a second battery discharge mode;

[0029] In the second battery discharge mode, the control circuit of the charging and discharging system controls the second switch and the fourth switch to close, controls the first switch and the third switch to open, and controls the first conversion circuit and the second conversion circuit to convert the fourth DC power output from the first battery into a third DC power output to the power generation device, so as to charge the first battery.

[0030] Optionally, the load device includes a second mutual inductor coil, a third conversion circuit, and a second battery, wherein the third conversion circuit is connected between the second battery and the second mutual inductor coil.

[0031] Optionally, the power generation device is composed of multiple power generation units. Each power generation unit includes a power generation device, a diode, and a resistor. The first end of the power generation device is connected to the first end of the first resistor. The anode of the diode is connected to the first end of the power generation device. The cathode of the diode is connected to the second end of the power generation device. The second end of the power generation device and the second end of the resistor serve as the output end of the power generation unit.

[0032] One beneficial effect of this embodiment is that the charging and discharging system provided in this embodiment is provided with a first discharge circuit between the load device and the power generation device. In the event that the power generation device fails due to factors such as low temperature or lack of starting voltage, the power generation device is not limited to the first battery supplying power to the power generation device. The load device can supply power to the power generation device through the first discharge circuit, thereby broadening the power supply mode of the charging and discharging system and improving the utilization rate of the load device.

[0033] Other features and advantages of the embodiments of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the embodiments of the present disclosure.

[0035] Figure 1 This is a structural block diagram of a charging and discharging system according to one embodiment;

[0036] Figure 2 This is a circuit diagram of a charging and discharging system according to one embodiment;

[0037] Figure 3 This is a circuit diagram of a charging and discharging system according to another embodiment;

[0038] Figure 4 This is a circuit diagram of a power generation unit according to one embodiment.

[0039] Figure captions:

[0040] First battery 100; power generation equipment 200; power generation unit 210; load device 300; second battery 310; third conversion circuit 320

[0041] First charging circuit 10; first conversion circuit 11; second conversion circuit 12; second discharging circuit 20; first discharging circuit 30;

[0042] First bridge arm 1; second bridge arm 2; third bridge arm 3; fourth bridge arm 4. Detailed Implementation

[0043] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0044] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0046] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0048] See Figure 1 The charging and discharging system according to an embodiment of the present disclosure will be described as shown.

[0049] The charging and discharging system of this embodiment includes a first charging circuit 10 and a first discharging circuit 30.

[0050] The first charging circuit 10 is connected between the power generation device 200 and the first battery 100 in the charging and discharging system. The first charging circuit 10 can have a DC-DC conversion function, that is, the first charging circuit 10 can convert the third DC power output from the power generation device 200 into a fourth DC power output to the first battery 100, and the first charging circuit 10 can also convert the fourth DC power output from the first battery 100 into a third DC power output to the power generation device 200, which is not limited here.

[0051] In some examples, the power generation equipment 200 can be a wind power generation equipment, a solar power generation equipment, or a hydrogen power generation equipment, etc., and there is no limitation here.

[0052] In some examples, taking the charging and discharging system as an example applied in a vehicle, the first battery 100 can be the vehicle's power battery.

[0053] In some examples, the first charging circuit 10 may be an isolated DC-DC converter circuit or a non-isolated DC-DC converter circuit, and no limitation is made here.

[0054] The first discharge circuit 30 is connected between the load device 300 and the power generation device 200. The first discharge circuit 30 can have a DC-DC conversion function, that is, the first discharge circuit 30 can convert the first DC power output from the load device 300 into a second DC power output to the power generation device 200, and the first discharge circuit 30 can also convert the second DC power output from the power generation device 200 into a first DC power output to the first battery 100, which is not limited here.

[0055] In other words, if the power generation device 200 fails due to factors such as low temperature or lack of starting voltage, the first discharge circuit 30 converts the first DC power output from the second battery 310 into a second DC power output to the power generation device 200. In other words, this charging and discharging system is not limited to the first battery 100 supplying power to the power generation device 200; the load device 300 can also supply power to the power generation device 200 through the first discharge circuit 30, thereby broadening the power supply methods of the charging and discharging system and improving the utilization rate of the load device 300.

[0056] In some embodiments, the load device 300 is equipped with a second battery 310, that is, the load device 300 has the function of charging and discharging, so that the electrical energy of the load device 300 can be output to the power generation device 200.

[0057] In some examples, the load device 300 can be a drone, an electric bicycle, or a motorcycle, etc., and is not limited here. Furthermore, the load device 300 is equipped with a second battery 310, which can be a battery that powers the load device 300 or a battery that powers some of the components of the load device 300, and is not limited here.

[0058] In some embodiments, the charging and discharging system further includes a second discharging circuit 20, which is connected between the load device 300 and the first battery 100. The second discharging circuit 20 may have a DC-DC conversion function, meaning it can convert the fifth DC power output from the first battery 100 into a sixth DC power output to the load device 300, and it can also convert the sixth DC power output from the load device 300 into a fifth DC power output to the first battery 100; this is not limited to these specific cases.

[0059] In some embodiments, the first charging circuit 10 can be an isolated DC-DC converter circuit, such as... Figure 2 As shown, the first charging circuit 10 includes a transformer T1, and the first discharging circuit 30 includes a first mutual inductance coil L1.

[0060] The first charging circuit 10 and the first discharging circuit 30 share a first conversion circuit 11. The first conversion circuit 11 includes a first bridge arm 1 and a second bridge arm 2. The connection point of the first bridge arm 1 and the second bridge arm 2 is connected to the power generation equipment 200. The midpoint of the first bridge arm 1 is connected to the first end of the first winding of the transformer T1 and the first end of the first mutual inductance coil L1, respectively. The midpoint of the second bridge arm 2 is connected to the second end of the first winding of the transformer T1 and the second end of the first mutual inductance coil L1, respectively.

[0061] In some examples, the first conversion circuit 11 is a DC-AC conversion circuit, which can convert the first AC power output from the first mutual inductor L1 into a second DC power output to the power generation device 200, or the second DC power output from the power generation device 200 into a first AC power output to the first mutual inductor L1, without limitation.

[0062] In some examples, such as Figure 2 As shown, the first discharge circuit 30 also includes a first capacitor C1. The first end of the first capacitor C1 is connected to the first end of the first mutual inductance coil L1, the second end of the first capacitor C1 is connected to the midpoint of the first bridge arm 1, and the second end of the first mutual inductance coil L1 is connected to the midpoint of the second bridge arm 2, so that the first capacitor C1 and the first mutual inductance coil L1 can form a resonant circuit.

[0063] In other words, by reusing the first conversion circuit 11, the utilization efficiency of the first conversion circuit 11 can be improved, and the circuit structure of the charging and discharging system can be effectively simplified, thereby effectively saving the space occupied by the charging and discharging system.

[0064] In some embodiments, such as Figure 2 As shown, the first charging circuit 10 also includes a first switch K1, and the first discharging circuit 30 also includes a second switch K2.

[0065] The first switch K1 is located between the first conversion circuit 11 and the first mutual inductance coil L1, and the second switch K2 is located between the first conversion circuit 11 and the first winding of the transformer T1.

[0066] In some examples, such as Figure 2 As shown, the first switch K1 can be connected between the midpoint of the second bridge arm 2 and the second end of the first inductor, and the second switch K2 can be connected between the midpoint of the second bridge arm 2 and the second end of the first winding of the transformer T1.

[0067] The charging and discharging system also includes a control circuit, in which the first switch K1, the second switch K2, and the first switching circuit 11 are controlled by the control circuit.

[0068] In some examples, the control circuit can be an Electronic Control Unit (ECU) that controls the first switch K1 and the second switch K2 to close or open. For example, the first switch K1 is a MOSFET, and the control circuit can output a corresponding control signal to the gate of the first switch K1 to close or open the first switch K1.

[0069] In some examples, the control circuit can control the first conversion circuit 11 to perform DC-AC conversion, so as to Figure 2 For example, the first switching transistor Q1 to the second switching transistor Q2 are all MOSFETs. This control circuit can output PWM wave signals with different duty cycles to control the two sets of switching transistors to conduct alternately, thereby realizing AC-DC conversion. Among them, one set of switching transistors consists of the first switching transistor Q1 and the fourth switching transistor Q4, and the other set consists of the second switching transistor Q2 and the third switching transistor Q3.

[0070] In the event of a failure of the power generation equipment 200, the control circuit is configured to close the first switch K1 and open the second switch K2. The control circuit is also configured to control the first conversion circuit 11 to convert the first alternating current output from the first mutual inductance coil L1 into a second direct current.

[0071] The first alternating current is obtained by converting the first direct current output from the second battery 310 after the first mutual inductance coil L1 is mutually inducted with the second mutual inductance coil L2 of the load device 300. For example... Figure 3As shown, the load device 300 may include a second battery 310, a third conversion circuit 320, a second mutual inductor L2, and a second capacitor C2. The two ends of the second battery 310 are connected to the input terminals of the third conversion circuit 320. The first terminal of the second capacitor C2 is connected to the first terminal of the second mutual inductor L2. The second terminal of the second capacitor C2 and the second terminal of the second mutual inductor L2 are connected to the output terminals of the third conversion circuit 320, such that the second mutual inductor L2 and the second capacitor C2 form a resonant circuit. The third conversion circuit 320 can be an inverter, which can convert the first direct current output from the second battery 310 into a third alternating current. Furthermore, under the mutual inductance of the first mutual inductor L1 and the second mutual inductor L2, the first mutual inductor L1 can output the first alternating current.

[0072] In some examples, the first capacitor C1 and the first mutual inductor L1, and the second capacitor C2 and the second mutual inductor L2, respectively form series resonances, and their values ​​satisfy the following conditions: Where f w This refers to the operating frequency of the wireless charging system. This example uses series resonance only; in practical applications, the connection methods of the first capacitor C1, the first mutual inductance coil L1, the second capacitor C2, and the second mutual inductance coil L2 can vary, including parallel resonance or LCC-type resonance. No limitation is made here.

[0073] In other words, by setting the first switch K1 and the second switch K2, the operation of the first charging circuit 10 and the first discharging circuit 30 can be switched, reducing the energy consumption of the first charging circuit 10 during the process of the load device 300 discharging for the power generation device 200, and improving the energy utilization rate of the load device 300.

[0074] In some embodiments, such as Figure 2 As shown, the second discharge circuit 20 and the first discharge circuit 30 share the first mutual inductance coil L1. The first discharge circuit 30 also includes a third switch K3. The first charging circuit 10 also includes a transformer T1, a fourth switch K4, and a second conversion circuit 12.

[0075] The third switch K3 is located between the second winding of transformer T1 and the first mutual inductance coil L1, and the fourth switch K4 is located between the second winding of transformer T1 and the second conversion circuit 12.

[0076] In some examples, such as Figure 2 As shown, the third switch K3 is connected between the second end of the first mutual inductance coil L1 and the midpoint of the fourth bridge arm 4, and the fourth switch K4 is connected between the second end of the second winding of the transformer T1 and the midpoint of the fourth bridge arm 4.

[0077] The charging and discharging system also includes a control circuit, in which the third switch K3, the fourth switch K4, and the second conversion circuit 12 are controlled by the control circuit.

[0078] In some examples, the control circuit can control the third switch K3 and the fourth switch K4 to close or open. For example, the fourth switch K4 is a MOSFET, and the control circuit can output a corresponding control signal to the gate of the fourth switch K4 to make the fourth switch K4 close or open.

[0079] In the event of a failure of the power generation equipment 200, the control circuit is configured to disconnect the third switch K3 and the fourth switch K4.

[0080] In other words, by setting the third switch K3 and the fourth switch K4, the energy consumption of the first charging circuit 10 during the discharge process of the load device 300 to the power generation device 200 is reduced, thereby further improving the energy utilization rate of the load device 300.

[0081] In some embodiments, the second conversion circuit 12 includes a third bridge arm 3 and a fourth bridge arm 4. The connection point of the third bridge arm 3 and the fourth bridge arm 4 is connected to the first battery 100. The midpoint of the third bridge arm 3 is connected to the first end of the second winding of the transformer T1, and the midpoint of the fourth bridge arm 4 is connected to the second end of the second winding of the transformer T1.

[0082] In some examples, the second conversion circuit 12 is a DC-AC conversion circuit, which can convert the fourth AC power output from the second winding of transformer T1 into a fourth DC power output to the first battery 100, or convert the fourth DC power output from the first battery 100 into a fourth AC power output to the second winding of transformer T1, so that the second winding of transformer T1 can output a third DC power to the power generation equipment 200, which is not limited here.

[0083] In some examples, such as Figure 2 As shown, the upper arm of the first bridge arm 1 can be composed of several first switching transistors Q1, the lower arm of the first bridge arm 1 can be composed of several second switching transistors Q2, the upper arm of the second bridge arm 2 can be composed of several third switching transistors Q3, and the lower arm of the second bridge arm 2 can be composed of several fourth switching transistors Q4. The first switching transistors Q1 to the fourth switching transistors Q4 can be MOSFETs. The source of the first switching transistor Q1 is connected to the drain of the second switching transistor Q2, the source of the third switching transistor Q3 is connected to the drain of the fourth switching transistor Q4, the drain of the first switching transistor Q1 is connected to the drain of the third switching transistor Q3, and the source of the second switching transistor Q2 is connected to the source of the fourth switching transistor Q4.

[0084] The upper arm of the third bridge arm 3 can be composed of several fifth switching transistors Q5, and the lower arm of the third bridge arm 3 can be composed of several sixth switching transistors Q6. The upper arm of the fourth bridge arm 4 can be composed of several seventh switching transistors Q7, and the lower arm of the fourth bridge arm 4 can be composed of several eighth switching transistors Q8. The fifth switching transistors Q5 to the eighth switching transistors Q8 can be MOSFETs. The source of the fifth switching transistor Q5 is connected to the drain of the sixth switching transistor Q6, the source of the seventh switching transistor Q7 is connected to the drain of the eighth switching transistor Q8, the drain of the fifth switching transistor Q5 is connected to the drain of the seventh switching transistor Q7, and the source of the sixth switching transistor Q6 is connected to the source of the eighth switching transistor Q8.

[0085] The first set of switching transistors Q1 to the eighth set of switching transistors Q8 are all controlled by the control circuit. The control circuit can control the two sets of switching transistors to conduct alternately to achieve DC-DC conversion. One set of switching transistors consists of the first set of switching transistors Q1, the fourth set of switching transistors Q4, the fifth set of switching transistors Q5 and the eighth set of switching transistors Q8, and the other set consists of the second set of switching transistors Q2, the third set of switching transistors Q3, the sixth set of switching transistors Q6 and the seventh set of switching transistors Q7.

[0086] In some examples, such as Figure 2 As shown, the first charging circuit 10 further includes a third inductor L3, a fourth inductor L4, and a third capacitor C3. The first end of the third inductor L3 is connected to the midpoint of the first bridge arm 1, and the second end of the third inductor L3 is connected to the first end of the third capacitor C3. The connection point between the second end of the third capacitor C3 and the first end of the fourth inductor L4 is connected to the first end of the first winding of the transformer T1, and the connection point between the second end of the fourth inductor L4 and the midpoint of the corresponding second bridge arm 2 is connected to the second end of the first winding of the transformer T1. The first charging circuit 10 also includes a fifth inductor L5 and a fifth capacitor C5. The first end of the fifth inductor L5 is connected to the first end of the second winding of the transformer T1, and the second end of the fifth inductor L5 is connected to the first end of the fifth capacitor C5. The second end of the fifth capacitor C5 is connected to the midpoint of the third bridge arm 3, so that the third inductor L3, the fourth inductor L4, the third capacitor C3, the fifth inductor L5, and the fifth capacitor C5 form a CLLC resonant circuit.

[0087] In some examples, the values ​​of the CLLC resonant circuit formed by the third inductor L3, the fourth inductor L4, the third capacitor C3, the fifth inductor L5, and the fifth capacitor C5 must meet the following requirements. Where f s The set frequency of the CLLC resonant circuit is also the operating frequency of the first conversion circuit 11. Operating the CLLC resonant circuit at this frequency allows the CLLC circuit to maintain high efficiency.

[0088] In some examples, the first DC power, the second DC power, the third DC power, the fourth DC power, and the fifth DC power simply refer to the DC power output by different objects in the charging and discharging system. The voltage or current values ​​of these DC power supplies may be the same or different, and this is not limited here.

[0089] In some examples, the first AC and the second AC simply refer to the AC outputs of different objects in the charging and discharging system. The voltage or current values ​​of these ACs may be the same or different, and this is not limited here.

[0090] The vehicle provided according to an embodiment of this disclosure includes a power generation device 200, a load device 300, a first battery 100, and a charging and discharging system according to any of the above embodiments. In other words, by configuring the above charging and discharging system, the integration of the vehicle's internal circuitry can be improved, thereby reducing costs.

[0091] In some embodiments, the first charging circuit 10 of the charging and discharging system includes a first conversion circuit 11, a second conversion circuit 12, a transformer T1, a second switch K2, and a fourth switch K4; the first discharging circuit 30 of the charging and discharging system includes a first mutual inductance coil L1, a first switch K1, and a first conversion circuit 11; and the second discharging circuit 20 of the charging and discharging system includes a second conversion circuit 12, a third switch K3, and a first mutual inductance coil L1.

[0092] The vehicle has at least one of a battery charging mode, a first battery discharging mode, and a first load discharging mode.

[0093] In battery charging mode, the control circuit of the charging and discharging system controls the second switch K2 and the fourth switch K4 to close, controls the first switch K1 and the third switch K3 to open, and controls the first conversion circuit 11 and the second conversion circuit 12 to convert the third DC power output by the generator 200 into the fourth DC power output to the first battery 100 so as to charge the first battery 100.

[0094] In some examples, such as Figure 2 As shown, in battery charging mode, the control circuit can control two sets of switching transistors to alternately conduct in order to achieve DC-DC conversion. One set of switching transistors consists of the first switching transistor Q1, the fourth switching transistor Q4, the fifth switching transistor Q5, and the eighth switching transistor Q8, while the other set consists of the second switching transistor Q2, the third switching transistor Q3, the sixth switching transistor Q6, and the seventh switching transistor Q7.

[0095] In the first battery discharge mode, the control circuit of the charging and discharging system controls the third switch K3 to close, controls the first switch K1, the second switch K2 and the fourth switch K4 to open, and controls the second conversion circuit 12 to convert the fifth DC power output from the first battery 100 into the second AC power output to the first mutual inductance coil L1, so that the second mutual inductance coil L2 of the load device 300 is mutually inducted with the first mutual inductance coil L1, so as to charge the load device 300.

[0096] In some examples, such as Figure 2 As shown, in the first battery discharge mode, the control circuit can control two sets of switching transistors to alternately conduct in order to achieve DC-AC conversion. One set of switching transistors is the fifth switching transistor Q5 and the eighth switching transistor Q8, and the other set of switching transistors is the sixth switching transistor Q6 and the seventh switching transistor Q7, so as to convert the fifth DC power output by the first battery 100 into the second AC power.

[0097] In the first load discharge mode, the control circuit of the charging and discharging system controls the first switch K1 to close, controls the second switch K2, the third switch K3 and the fourth switch K4 to open, and controls the first conversion circuit 11 to convert the first AC power output from the first mutual inductance coil L1 into the second DC power output to the power generation equipment 200.

[0098] In some examples, such as Figure 2 As shown, in the first battery discharge mode, the control circuit can control two sets of switching transistors to alternately conduct in order to achieve AC-DC conversion. One set of switching transistors consists of the first switching transistor Q1 and the fourth switching transistor Q4, and the other set consists of the second switching transistor Q2 and the third switching transistor Q3, so as to convert the first AC power output from the first mutual inductance coil L1 into the second DC power.

[0099] In other words, after the vehicle is equipped with this charging and discharging system, it can improve the integration of the vehicle's internal circuitry while enabling different operating modes.

[0100] In some embodiments, the vehicle also has a second load discharge mode.

[0101] In the second load discharge mode, the control circuit of the charging and discharging system controls the third switch K3 to close, controls the first switch K1, the second switch K2 and the fourth switch K4 to open, and controls the second conversion circuit 12 to convert the first AC power output from the first mutual inductance coil L1 into the third DC power output to the first battery 100 so as to charge the first battery 100.

[0102] In some examples, such as Figure 2As shown, in the second load discharge mode, the control circuit can control two sets of switching transistors to alternately conduct in order to achieve AC-DC conversion. One set of switching transistors consists of the fifth switching transistor Q5 and the eighth switching transistor Q8, and the other set consists of the sixth switching transistor Q6 and the seventh switching transistor Q7, in order to convert the first AC power output from the first mutual inductance coil L1 into the third DC power.

[0103] In other words, after the vehicle is equipped with this charging and discharging system, it can use the load device 300 to charge the first battery 100, so that under some special circumstances, the load device 300 can supply power to the first battery 100 to improve the safety of the vehicle.

[0104] In some examples, under the second load discharge mode, the control circuit can control some components of the first battery 100 to operate, so that the first battery 100 can prioritize powering the circuit module used for alarm or distress calls, thereby improving the energy utilization efficiency of the first battery 100.

[0105] In some embodiments, the vehicle also has a second battery 310 discharge mode.

[0106] In the discharge mode of the second battery 310, the control circuit of the charging and discharging system controls the second switch K2 and the fourth switch K4 to close, controls the first switch K1 and the third switch K3 to open, and controls the first conversion circuit 11 and the second conversion circuit 12 to convert the fourth DC power output from the first battery 100 into the third DC power output to the generator 200 so as to charge the first battery 100.

[0107] In some examples, such as Figure 2 As shown, in the second battery 310 discharge mode, the control circuit can control two sets of switching transistors to alternately conduct in order to achieve DC-DC conversion. One set of switching transistors consists of the first switching transistor Q1, the fourth switching transistor Q4, the fifth switching transistor Q5 and the eighth switching transistor Q8, while the other set consists of the second switching transistor Q2, the third switching transistor Q3, the sixth switching transistor Q6 and the seventh switching transistor Q7.

[0108] In other words, after the vehicle is equipped with this charging and discharging system, it can use the first battery 100 to reverse charge the power generation device 200, so that even if the power generation device 200 fails, the first battery 100 can still provide power to the power generation device 200.

[0109] In some embodiments, such as Figure 3As shown, the load device 300 may include a second battery 310, a third conversion circuit 320, a second mutual inductor L2, and a second capacitor C2. The two ends of the second battery 310 are connected to the input terminals of the third conversion circuit 320. The first terminal of the second capacitor C2 is connected to the first terminal of the second mutual inductor L2. The second terminal of the second capacitor C2 and the second terminal of the second mutual inductor L2 are connected to the output terminals of the third conversion circuit 320, such that the second mutual inductor L2 and the second capacitor C2 form a resonant circuit. The third conversion circuit 320 can be an inverter, which can convert the first direct current output from the second battery 310 into a third alternating current. Furthermore, under the mutual inductance of the first mutual inductor L1 and the second mutual inductor L2, the first mutual inductor L1 can output the first alternating current.

[0110] In other words, after the vehicle is equipped with the load device 300, it can use the load device 300 to discharge the power generation device 200 or the first battery 100, thereby improving the utilization efficiency of the second battery 310 of the load device 300.

[0111] In some embodiments, such as Figure 4 As shown, the power generation equipment 200 is composed of multiple power generation units. These multiple power generation units can be connected in series, in parallel, or in a series-parallel combination to form the power generation equipment 200, which is not limited here.

[0112] The power generation unit includes a power generation device, a diode D1, and a resistor R1. The first terminal of the power generation device is connected to the first terminal of the first resistor R1. The anode of the diode D1 is connected to the first terminal of the power generation device, and the cathode of the diode D1 is connected to the second terminal of the power generation device. The second terminal of the power generation device and the second terminal of the resistor R1 serve as the output terminal of the power generation unit. In other words, by using diode D1, the reverse flow of input DC power into the power generation unit when the first battery 100 or the load device 300 discharges for the power generation device 200 can be reduced. Instead, the input DC power can flow into resistor R1, causing resistor R1 to generate heat, thereby keeping the power generation device 200 at its normal operating temperature and enabling stable operation of the power generation device 200 under different conditions.

[0113] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A charging and discharging system, characterized in that, The charging and discharging system includes: A first charging circuit is connected between the power generation equipment and the first battery of the charging and discharging system. A first discharge circuit is connected between the load device and the power generation device; the first discharge circuit outputs electrical energy from the load device to the power generation device.

2. The charging and discharging system according to claim 1, characterized in that, The load device is equipped with a second battery.

3. The charging and discharging system according to claim 1, characterized in that, The charging and discharging system further includes a second discharge circuit, which is connected between the load device of the charging and discharging system and the first battery.

4. The charging and discharging system according to claim 1, characterized in that, The first charging circuit includes a transformer, and the first discharging circuit includes a first mutual inductance coil. The first charging circuit and the first discharging circuit share a first conversion circuit. The first conversion circuit includes a first bridge arm and a second bridge arm. The connection point of the first bridge arm and the second bridge arm is connected to the power generation equipment. The midpoint of the first bridge arm is connected to the first end of the first winding of the transformer and the first end of the first mutual inductance coil, respectively. The midpoint of the second bridge arm is connected to the second end of the first winding of the transformer and the second end of the first mutual inductance coil, respectively.

5. The charging and discharging system according to claim 4, characterized in that, The first charging circuit further includes a first switch, and the first discharging circuit further includes a second switch; The first switch is disposed between the first conversion circuit and the first mutual inductance coil, and the second switch is disposed between the first conversion circuit and the first winding of the transformer; The charging and discharging system further includes a control circuit, wherein the first switch, the second switch, and the first switching circuit are controlled by the control circuit. In the event of a power generation failure, the control circuit is configured to control the first switch to close and the second switch to open; the control circuit is also configured to control the first conversion circuit to convert the first alternating current output by the first mutual inductance coil into a second direct current; wherein the first alternating current is obtained by converting the first direct current output by the second battery configured in the load device after the first mutual inductance coil has mutual inductance with the second mutual inductance coil of the load device.

6. The charging and discharging system according to claim 3, characterized in that, The second discharge circuit and the first discharge circuit share the first mutual inductance coil. The first discharge circuit also includes a third switch. The first charging circuit also includes a transformer, a fourth switch, and a second conversion circuit. The third switch is disposed between the second winding of the transformer and the first mutual inductance coil, and the fourth switch is disposed between the second winding of the transformer and the second conversion circuit; The charging and discharging system further includes a control circuit, and the third switch, the fourth switch and the second conversion circuit are controlled by the control circuit. In the event of a power generation failure, the control circuit is configured to disconnect the third and fourth switches.

7. The charging and discharging system according to claim 6, characterized in that, The second conversion circuit includes a third bridge arm and a fourth bridge arm. The connection point of the third bridge arm and the fourth bridge arm is connected to the first battery. The midpoint of the third bridge arm is connected to the first end of the second winding of the transformer, and the midpoint of the fourth bridge arm is connected to the second end of the second winding of the transformer.

8. A vehicle, characterized in that, The vehicle includes a power generation device, a load device, a first battery, and a charging and discharging system, wherein the charging and discharging system is the charging and discharging system according to any one of claims 1 to 5.

9. The vehicle according to claim 8, characterized in that, The first charging circuit of the charging and discharging system includes a first conversion circuit, a second conversion circuit, a transformer, a second switch, and a fourth switch; the first discharging circuit of the charging and discharging system includes a first mutual inductance coil, a first switch, and a first conversion circuit; and the second discharging circuit of the charging and discharging system includes a second conversion circuit, a third switch, and a first mutual inductance coil. The vehicle has at least one of a battery charging mode, a first battery discharging mode, and a first load discharging mode; In the battery charging mode, the control circuit of the charging and discharging system controls the second switch and the fourth switch to close, controls the first switch and the third switch to open, and controls the first conversion circuit and the second conversion circuit to convert the third DC power output by the power generation equipment into a fourth DC power output to the first battery, so as to charge the first battery. In the first battery discharge mode, the control circuit of the charging and discharging system controls the third switch to close, controls the first switch, the second switch and the fourth switch to open, and controls the second conversion circuit to convert the fifth DC power output from the first battery into the second AC power output to the first mutual inductor coil, so that the second mutual inductor coil of the load device is mutually inducted with the first mutual inductor coil, so as to charge the load device. In the first load discharge mode, the control circuit of the charging and discharging system controls the first switch to close, controls the second switch, the third switch and the fourth switch to open, and controls the first conversion circuit to convert the first AC power output from the first mutual inductance coil into the second DC power output to the power generation equipment.

10. The vehicle according to claim 9, characterized in that, The vehicle also has a second load discharge mode; In the second load discharge mode, the control circuit of the charging and discharging system controls the third switch to close, controls the first switch, the second switch and the fourth switch to open, and controls the second conversion circuit to convert the first AC power output from the first mutual inductance coil into a third DC power output to the first battery, so as to charge the first battery.

11. The vehicle according to claim 9, characterized in that, The vehicle also has a second battery discharge mode; In the second battery discharge mode, the control circuit of the charging and discharging system controls the second switch and the fourth switch to close, controls the first switch and the third switch to open, and controls the first conversion circuit and the second conversion circuit to convert the fourth DC power output from the first battery into a third DC power output to the power generation device, so as to charge the first battery.

12. The vehicle according to claim 8, characterized in that, The load device includes a second mutual inductor coil, a third conversion circuit, and a second battery, wherein the third conversion circuit is connected between the second battery and the second mutual inductor coil.

13. The vehicle according to claim 8, characterized in that, The power generation equipment is composed of multiple power generation units. Each power generation unit includes a power generation device, a diode, and a resistor. The first end of the power generation device is connected to the first end of the first resistor. The anode of the diode is connected to the first end of the power generation device. The cathode of the diode is connected to the second end of the power generation device. The second end of the power generation device and the second end of the resistor serve as the output terminals of the power generation unit.

Images