Circuit, power supply device, charge-discharge system, and vehicle

Abstract

The utility model discloses a kind of circuit, power supply device, charge-discharge system and vehicle, the circuit includes: battery and portable power source;Connection module, the connection module is connected with the battery, the portable power source;Wherein, when the connection module is on, loop is formed between the portable power source and the battery.This circuit can use portable power source to charge battery, and also can use battery to charge portable power source, and application mode is more flexible.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a circuit, a power supply device, a charging and discharging system, and a vehicle. Background Technology

[0002] If a battery is left idle for a long time, it will become depleted, which will cause the battery to malfunction. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a circuit that can both utilize a power bank to recharge a storage battery, extending its idle time, and utilize a storage battery to recharge a power bank, making its application more flexible.

[0004] The second objective of this utility model is to provide a power supply device.

[0005] The third objective of this utility model is to propose a charging and discharging system.

[0006] The fourth objective of this utility model is to propose a vehicle.

[0007] To address the aforementioned problems, a first aspect of this utility model provides a circuit comprising: a storage battery and a power bank; and a connection module connected to the storage battery and the power bank; wherein, when the connection module is turned on, a circuit is formed between the power bank and the storage battery.

[0008] According to the circuit of this utility model embodiment, a connection module is provided for connecting the storage battery and the power bank. By connecting the connection module, a circuit is formed between the power bank and the storage battery, so that the power bank can be used to replenish the storage battery and extend the resting time, and the storage battery can be used to replenish the power bank, making the application more flexible.

[0009] In some embodiments, the power bank includes at least one battery cell connected to a first side of the connection module; the second side of the connection module is connected to the battery.

[0010] In some embodiments, the power bank includes a plurality of battery cells, which are connected in series and / or in parallel.

[0011] In some embodiments, the plurality of battery cells may be selectively connected in series and / or in parallel.

[0012] In some embodiments, each battery cell includes: a battery pack; and a first switching unit connected to the battery pack and adjacent battery cells to control the series-parallel connection mode between the battery cell and the adjacent battery cells.

[0013] In some embodiments, the first switching unit includes: a first switch, a first end of which is connected to a first end of the battery pack, and a second end of which is connected to a second end of a first switch in an adjacent battery cell and a first end of the first side; a second switch, a first end of which is connected to a first end of the first switch and a first end of the battery pack, and a second end of which is connected to a second end of the battery pack in the adjacent battery cell; and a third switch, a first end of which is connected to a second end of the battery pack, and a second end of which is connected to a second end of the second switch; wherein, the second end of the battery pack of the first battery cell in the plurality of battery cells is connected to the second end of the first side.

[0014] In some embodiments, multiple battery cells may be selectively connected to the circuit via the first switching unit.

[0015] In some embodiments, the battery is used to charge the power bank through the circuit, or the power bank is used to charge the battery through the circuit, or the battery and / or the power bank is used to supply power to an external load.

[0016] In some embodiments, the connection module includes: a first filtering unit connected to the battery; and a second switching unit disposed between the first filtering unit and the power bank, the second switching unit being used to control the connection module to be turned on or off.

[0017] In some embodiments, the first filtering unit includes: a first filtering subunit, a first end of which is connected to the positive terminal of the battery, and a second end of which is connected to the first end of the second switching unit; and a second filtering subunit, a first end of which is connected to the negative terminal of the battery, and a second end of which is connected to the second end of the second switching unit.

[0018] In some embodiments, the first filter subunit includes: a first inductor, a first end of the first inductor being connected to the positive terminal of the battery, and a second end of the first inductor being connected to the first end of the second switching unit.

[0019] In some embodiments, the second filter subunit includes: a second inductor, a first end of the second inductor being connected to the negative terminal of the battery, and a second end of the second inductor being connected to the second end of the second switching unit.

[0020] In some embodiments, the second switching unit includes: a fourth switch, the first end of which is connected to the second end of the first filtering subunit, and the second end of which is connected to the first end of the power bank; and a fifth switch, the first end of which is connected to the second end of the second filtering subunit, and the second end of which is connected to the second end of the power bank.

[0021] In some embodiments, the connection module further includes: a first voltage regulator unit, wherein a first end of the first voltage regulator unit is connected to a second end of the first filter subunit and a first end of the second switch unit, and a second end of the first voltage regulator unit is connected to a second end of the second filter subunit and a second end of the second switch unit.

[0022] In some embodiments, the circuit further includes a sixth switch, the first end of which is connected to the positive terminal of the battery, and the second end of which is connected to the first end of the second side, to control the connection between the battery and the external environment.

[0023] In some embodiments, the circuit further includes: a power battery; a DC-DC module, wherein a first terminal of the DC-DC module is connected to the positive terminal of the power battery, a second terminal of the DC-DC module is connected to the negative terminal of the power battery, a third terminal of the DC-DC module is connected to the second terminal of the sixth switch and the first terminal of the second side, and a fourth terminal of the DC-DC module is connected to the negative terminal of the storage battery and the second terminal of the second side; wherein the power battery is used to charge the storage battery and / or the mobile power supply.

[0024] In some embodiments, the storage battery and / or the mobile power source are also used to charge the power battery.

[0025] In some embodiments, the DC-DC module includes: a second filter unit, the input side of which is connected to the power battery; an inverter unit, the input side of which is connected to the output side of the second filter unit; a transformer, the main side of which is connected to the output side of the inverter unit; and a third filter unit, the input side of which is connected to the secondary side of the transformer, and the output side of which is connected to the battery.

[0026] In some embodiments, the second filtering unit includes: a third filtering subunit, the first end of which is connected to the positive terminal of the power battery, and the second end of which is connected to the first input terminal of the inverter unit; and a fourth filtering subunit, the first end of which is connected to the negative terminal of the power battery, and the second end of which is connected to the second input terminal of the inverter unit.

[0027] In some embodiments, the third filter subunit includes: a third inductor, the first end of which is connected to the positive terminal of the power battery, and the second end of which is connected to the first input terminal of the inverter unit.

[0028] In some embodiments, the fourth filter subunit includes: a fourth inductor, the first end of which is connected to the negative terminal of the power battery, and the second end of which is connected to the second input terminal of the inverter unit.

[0029] In some embodiments, the inverter unit includes: a first bridge arm, a first end of which is connected to a second end of the third filter subunit, a second end of which is connected to a second end of the fourth filter subunit, and a midpoint of which is connected to a first end of the main side; and a second bridge arm, a first end of which is connected to a second end of the third filter subunit and a first end of the first bridge arm, a second end of which is connected to a second end of the fourth filter subunit and a second end of the first bridge arm, and a midpoint of which is connected to a second end of the main side.

[0030] In some embodiments, the first bridge arm includes: a first power transistor, the first end of which is connected to the second end of the third filter subunit, and the second end of which is connected to the first end of the main side; and a second power transistor, the first end of which is connected to the second end of the first power transistor and the first end of the main side, and the second end of which is connected to the second end of the fourth filter subunit.

[0031] In some embodiments, the second bridge arm includes: a third power transistor, the first end of which is connected to the first end of the first power transistor and the second end of the third filter subunit, and the second end of which is connected to the second end of the main side; and a fourth power transistor, the first end of which is connected to the second end of the third power transistor and the second end of the main side, and the second end of which is connected to the second end of the second power transistor and the second end of the fourth filter subunit.

[0032] In some embodiments, the third filtering unit includes: a fifth filtering subunit, the first end of which is connected to the first end of the secondary side, and the second end of which is connected to the first end of the sixth switch; and a sixth filtering subunit, the first end of which is connected to the second end of the secondary side, and the second end of which is connected to the negative terminal of the battery.

[0033] In some embodiments, the fifth filter subunit includes: a fifth inductor, the first end of the fifth inductor being connected to the first end of the secondary side, and the second end of the fifth inductor being connected to the first end of the sixth switch.

[0034] In some embodiments, the sixth filter subunit includes: a sixth inductor, the first end of the sixth inductor being connected to the second end of the secondary side, and the second end of the sixth inductor being connected to the negative terminal of the battery;

[0035] In some embodiments, the DC-DC module further includes: a second voltage regulator unit, wherein a first terminal of the second voltage regulator unit is connected to a second terminal of the fifth filter subunit and a first terminal of the sixth switch, and a second terminal of the second voltage regulator unit is connected to a second terminal of the sixth filter subunit and the negative terminal of the battery.

[0036] In some embodiments, the DC-DC module further includes a rectification unit disposed between the secondary side and the input side of the third filter unit, the rectification unit being used to rectify the secondary voltage output by the transformer.

[0037] In some embodiments, the rectifier unit includes: a first diode, the anode of which is connected to a first end of the secondary side, and the cathode of which is connected to a first input end of the third filter unit; and a second diode, the anode of which is connected to a second end of the secondary side, and the cathode of which is connected to a second input end of the third filter unit.

[0038] In some embodiments, the power bank is detachably connected to the connection module.

[0039] A second aspect of this utility model provides a power supply device, including the circuit described in the above embodiment.

[0040] According to the power supply device of the present invention, the power supply can both use the power bank to replenish the battery and extend the resting time, and use the battery to replenish the power bank to ensure that the power bank has sufficient power. The power bank can be used flexibly, and the power battery can be used to charge the battery and / or the power bank.

[0041] A third aspect of this utility model provides a charging and discharging system, including the circuit described in the above embodiment.

[0042] The charging and discharging system according to the present invention can both use a power bank to replenish the battery and extend the resting time, and use the battery to replenish the power bank to ensure that the power bank has sufficient power. The power bank can be used flexibly, and the power battery can be used to charge the battery and / or the power bank.

[0043] In some embodiments, the charging and discharging system further includes a control unit connected to the circuit, the control unit being used to control the operating state of the circuit.

[0044] The fourth aspect of this utility model provides a vehicle that includes the circuitry of the above embodiments, or the power supply device of the above embodiments, or the charging and discharging system of the above embodiments.

[0045] According to the embodiments of this utility model, the vehicle can use a power bank to replenish the battery and extend the idle time, and it can also use the battery to replenish the power bank to ensure that the power bank has sufficient power, so that the power bank can be used flexibly.

[0046] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0047] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0048] Figure 1 This is a schematic diagram of the charging and discharging circuit topology according to an embodiment of the present invention;

[0049] Figure 2 This is a circuit topology diagram of a mobile power supply according to an embodiment of the present invention;

[0050] Figure 3 This is a circuit topology diagram of a mobile power supply according to another embodiment of the present invention;

[0051] Figure 4 This is a circuit topology diagram of a mobile power supply according to another embodiment of the present invention;

[0052] Figure 5 This is a circuit topology diagram of a mobile power supply according to another embodiment of the present invention;

[0053] Figure 6 This is a structural block diagram of a power supply device according to an embodiment of the present invention;

[0054] Figure 7 This is a structural block diagram of a charging and discharging system according to an embodiment of the present invention;

[0055] Figure 8 This is a schematic diagram of a charging and discharging system according to another embodiment of the present invention.

[0056] Figure label:

[0057] Charging and discharging system 1000;

[0058] Charging / discharging circuit 100; Control unit 300;

[0059] 10 storage batteries; 20 power banks; 30 connection modules; 40 power batteries; 50 DC-DC modules;

[0060] Battery unit 1; First switch unit 2; First switch K1; Battery pack E; Second switch K2; Third switch K3; First filter unit 3; Second switch unit 4; First inductor L1, second inductor L2 and first regulated power supply C1; Fourth switch K4 and fifth switch K5; Sixth switch K6; Second filter unit 5; Inverter unit 6; Third filter unit 7; Transformer 8; Third inductor L3; Fourth inductor L4; First power transistor Q1; Second power transistor Q2; Third power transistor Q3; Fourth power transistor Q4; Fifth inductor L5; Sixth inductor L6; Second regulated unit C2; Rectifier unit 9; First diode D1; Second diode D2;

[0061] First filter subunit 31; Second filter subunit 32; Third filter subunit 51; Fourth filter subunit 52; Fifth filter subunit 71; Sixth filter subunit 72;

[0062] Battery unit 11; Battery unit 12; Battery unit 13; Battery pack E1; First switch K1a; Second switch K2a; Third switch K3a; Battery pack E2; First switch K1b; Second switch K2b; Third switch K3b; Battery pack E3; First switch K1c; Second switch K2c; Third switch K3c. Detailed Implementation

[0063] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0064] Currently, after a vehicle has been sitting for a long time, the 12V battery will become depleted, causing the vehicle to fail to start. In related technologies, a portable power bank is used to replenish the battery to extend the vehicle's sitting time. However, the portable power bank may not be able to guarantee sufficient power, and may become unusable after replenishment due to insufficient power.

[0065] To address the aforementioned problems, the first aspect of this utility model provides a circuit that can both use a mobile power source to recharge a storage battery and extend its idle time, and also use a storage battery to recharge a mobile power source, making its application more flexible.

[0066] The following is for reference. Figure 1 The charging and discharging circuit 100 according to an embodiment of the present invention is described as follows: Figure 1 As shown, the circuit 100 includes a storage battery 10, a power bank 20, and a connection module 30.

[0067] The connection module 30 is connected to the storage battery 10 and the power bank 20; when the connection module is turned on, a circuit is formed between the power bank 30 and the storage battery 20.

[0068] Specifically, if the battery 10 is not used for a long time, it will become depleted, causing it to malfunction. Therefore, this application connects the battery 10 and the power bank 20 through the connection module 30. After the connection module 30 is turned on, a circuit can be formed between the power bank 20 and the battery 10, allowing the power bank 20 to replenish the battery 10 and prevent it from malfunctioning due to depletion. On the other hand, the power bank 20 has various functions depending on its capacity and power. To ensure that the power bank 20 can perform its various functions, it should be ensured that it has sufficient power. However, after the power bank 20 replenishes the battery 10, its power will decrease and it may become unusable due to insufficient power. After the connection module 30 is turned on, the battery 10 can also replenish the power bank 20, ensuring that it has sufficient power and can be used flexibly. Alternatively, the battery 10 and the power bank 20 can be used simultaneously to charge an external power source. It should be noted that since the battery 10 can be replenished by the power source 20, the battery capacity can be appropriately reduced, thereby reducing the weight of the circuit 100 and lowering the cost.

[0069] Among them, the storage battery 10 can be used in vehicles, aircraft or robots, etc., without specific restrictions. Taking the storage battery 10 as a vehicle as an example, if the vehicle is powered off and left idle for a long time, the storage battery 10 will be depleted, causing the vehicle to fail to start normally. This application uses a mobile power supply 20 to replenish the storage battery 10, so as to avoid the problem of the vehicle failing to start due to the depletion of the storage battery 10, extend the vehicle's idle time, and appropriately reduce the capacity of the storage battery 10, which can reduce the vehicle weight and reduce costs. For the selection of the storage battery 10, the static current and the number of idle days should be considered. The static current of each electrical component of the whole vehicle is generally not greater than 20mA. The vehicle can start normally after being idle for a specified number of days, which is generally required to be 42 days. Therefore, the capacity calculation formula of the storage battery 10 is shown in formula (1).

[0070] (1)

[0071] In formula (1): C1 is the battery capacity, in Ah; SOC1 is the static current of the vehicle, in mA; SOC1 is the initial discharge state, generally taken as 80%; SOC2 is the discharge termination state, generally taken as 30%, because the starting current requirement of electric vehicles is relatively small, 30% SOC can meet the starting requirements of the vehicle; t is the number of resting days, in days; SD is the battery self-discharge rate % / 42 days, generally taken as 4%.

[0072] According to the circuit 100 of this utility model embodiment, a connection module 30 is provided for connecting the storage battery 10 and the power bank 20. By connecting the connection module 30, a circuit is formed between the power bank 20 and the storage battery 10. Thus, the power bank 20 can be used to replenish the storage battery 10 and extend the resting time, and the storage battery 10 can also be used to replenish the power bank 20, ensuring that the power bank 20 has sufficient power. Therefore, the power bank 20 can be used flexibly.

[0073] In some embodiments, such as Figure 1 As shown, the power bank 20 includes at least one battery cell 1.

[0074] At least one battery cell 1 is connected to the first side of the connection module 30; the second side of the connection module 30 is connected to the storage battery 10.

[0075] Specifically, when the connection module 30 is turned on, the power bank 20 replenishes the battery 10 by connecting the battery unit 1 into the circuit. If the power bank 20 includes one battery unit 1, it replenishes the battery 10 by connecting the battery unit 1 into the circuit. If the power bank 20 includes multiple battery units 1, since the capacity of the multiple battery units 1 is different, the battery units 1 connected into the circuit can be adjusted to replenish the battery 10 without affecting the normal use of the power bank 20.

[0076] In some embodiments, such as Figure 1 As shown, the power bank 20 includes multiple battery cells 1.

[0077] Multiple battery cells 1 are connected in series and / or in parallel.

[0078] Specifically, the connection method of multiple battery units 1 is configured based on the output requirements of the power bank 20. For example, if the output voltage of the power bank 20 is to be increased, multiple battery units 1 can be connected in series; if the capacity of the power bank 20 is to be increased without changing its output voltage, multiple battery units 1 can be connected in parallel; if the output voltage of the power bank 20 is to be increased and its capacity is to be increased, a hybrid connection method of series and parallel can be used, thereby configuring the connection method of multiple battery units 1 according to the requirements of the power bank 20.

[0079] In some embodiments, multiple battery cells may be selectively connected in series and / or in parallel.

[0080] Specifically, the connection method of multiple battery units 1 can be changed by using a switch assembly, so that the mobile power supply 20 can flexibly change the connection method between multiple battery units 1 according to different needs, so as to meet various requirements for replenishing the battery 10 and ensure the normal use of the battery 10.

[0081] In some embodiments, such as Figure 2 As shown, each battery cell 1 includes a battery pack E and a first switching unit 2.

[0082] The first switch unit 2 is connected to the battery pack E and the adjacent battery unit 1 to control the series and parallel connection mode between the battery unit 1 and the adjacent battery unit 1.

[0083] Specifically, multiple battery units 1 are configured as a power bank 20 in series and / or parallel connection. The capacity of the power bank 20 can be adjusted according to different actual needs. Changing the switching state of the first switch unit 2 can control the connection method of the battery unit 1, thereby changing the connection method between multiple battery units 1 and realizing the adjustment of the capacity of the power bank 20. If a battery unit 1 is damaged, the first switch unit 2 can also control the damaged battery unit 1 to disconnect, so as to avoid affecting the entire power bank 20.

[0084] In some embodiments, such as Figure 1 As shown, the first switch unit 2 includes a first switch K1, a second switch K2, and a third switch K3.

[0085] Specifically, the first end of the first switch K1 is connected to the first end of the battery pack E, and the second end of the first switch K1 is connected to the second end of the first switch in the adjacent battery cell and the first end of the first side; the first end of the second switch K2 is connected to the first end of the first switch K1 and the first end of the battery pack E, and the second end of the second switch K2 is connected to the second end of the battery pack in the adjacent battery cell; the first end of the third switch K3 is connected to the second end of the battery pack E, and the second end of the third switch K3 is connected to the second end of the second switch K2; the second end of the battery pack E of the first battery cell in the plurality of battery cells 1 is connected to the second end of the first side.

[0086] Specifically, by setting a first switch K1, a second switch K2, and a third switch K3 in the first switch unit 2, the connection method of the battery unit 1 can be changed by altering the combination of different switching states of the first switch K1, the second switch K2, and the third switch K3. For example, each battery unit 1 can be connected in parallel; each battery unit 1 can be connected in series; or each battery unit 1 can be connected in a combination of series and parallel connections. For instance, when the power bank 20 is in the vehicle, to avoid voltage surges when charging the battery 1010, at least one battery unit 1 discharges in parallel. If the power bank 20 also supplies power to a load, the battery units 1 can be connected in series to supply power to the load. When the power bank 20 is away from the vehicle and supplies power to a load, it is limited by the operating voltage of the load. If the output voltage of the power bank 20 is not changed, it cannot meet the voltage requirements of various loads. By connecting multiple battery units 1 in series, the output voltage of the power bank 20 can be increased; or by connecting multiple battery units 1 in parallel, the output voltage of the power bank 20 can be decreased; or by combining the connection methods of multiple battery units 1, other voltage requirements of the load can be accommodated.

[0087] For example, such as Figure 1 As shown, battery unit 11 includes battery pack E1, first switch K1a, second switch K2a and third switch K3a; battery unit 12 includes battery pack E2, first switch K1b, second switch K2b and third switch K3b; battery unit 13 includes battery pack E3, first switch K1c, second switch K2c and third switch K3c.

[0088] like Figure 3 As shown, when the first switch K1a, the third switch K3a, the first switch K1b, the third switch K3b and the first switch K1c are closed, and the second switch K2a, the second switch K2b, the second switch K2c and the third switch K3c are open, then battery unit 11, battery unit 12 and battery unit 13 are connected in parallel.

[0089] Or such as Figure 4As shown, when the second switch K2a, the second switch K2b and the first switch K1c are closed, and the first switch K1a, the third switch K3a, the first switch K1b, the third switch K3b, the second switch K2c and the third switch K3c are open, the battery unit 11, the battery unit 12 and the battery unit 13 are connected in series.

[0090] Alternatively, by controlling the second switch K2a, the first switch K1b, the third switch K3b, and the first switch K1c to close, and the first switch K1b, the third switch K3b, the second switch K2b, the second switch K2c, and the third switch K3c to open, battery unit 12 and battery unit 13 are connected in parallel and then connected in series with battery unit 11.

[0091] In some embodiments, multiple battery cells can be selectively connected to the circuit via a first switching unit.

[0092] Specifically, since each battery unit 1 is equipped with a first switch K1, changing the switching state of the first switch K1 can control the connection and disconnection of the battery unit 1, thereby changing the number of battery units 1 connected to the power bank 20, that is, the number connected to the circuit, and realizing the adjustment of the capacity of the power bank 20. If a group of battery units 1 is damaged, the damaged battery unit 1 is disconnected by controlling the first switch K1 to avoid affecting the entire power bank 20.

[0093] In some embodiments, the battery is used to charge the power bank via a circuit, or the power bank is used to charge the battery via a circuit, or the battery and / or power bank is used to supply power to an external load.

[0094] Specifically, the controller monitors the status of the battery 10 and the power bank 20 to determine whether the battery 10 needs recharging and whether the power bank 20 has sufficient energy. It then controls the continuity of the control loop, the charging / discharging status of the battery, and the charging / discharging status of the power bank 20. When it is determined that the battery 10 needs recharging, the controller's control loop is activated, and simultaneously the power bank 20 is controlled to enter a discharging state. The electrical signal output by the power bank 20 then enters the battery through the loop, recharging the battery 10 and preventing it from becoming unusable due to power depletion. Alternatively, when it is determined that the power bank 20 needs recharging, the controller's control loop is activated, and simultaneously the battery 10 is controlled to enter a discharging state. The electrical signal output by the battery 10 then enters the power bank 20 through the loop, replenishing its energy and ensuring that the power bank 20 can perform its various functions. Simultaneously, the connection method of the battery unit 1 is adjusted according to the different needs of recharging the battery 10 and the power bank 20. For example, if the first switch K1a is closed and the second switch K2a, the third switch K3a, the first switch K2b, the second switch K2b, the third switch K3b, the first switch K1c, the second switch K2c, and the third switch K3c are open, then only battery cell 11 is connected to the circuit; or as... Figure 5 As shown, by closing the first switch K1a, the third switch K3a, the third switch K3b, and the first switch K1c, and opening the second switch K2a, the first switch K1b, the second switch K2b, the second switch K2c, and the third switch K3c, battery cell 11 and battery cell 13 are connected in parallel to the charging and discharging circuit; or as shown... Figure 4 As shown, when the second switch K2a, the second switch K2b, and the first switch K1c are closed, and the first switch K1a, the third switch K3a, the first switch K1b, the third switch K3b, the second switch K2c, and the third switch K3c are open, battery units 11, 12, and 13 are connected in series to the charging and discharging circuit. This allows the mobile circuit 20 to charge the battery 10 through the circuit, or the battery 10 to charge the mobile power supply 20. The specific connection method can be set according to the actual situation, and will not be elaborated here.

[0095] Alternatively, the battery 10 and / or the power bank 20 can be used to supply power to an external load. That is, based on the power state of the battery 10 and the power state of the power bank 20, the controller selects whether the external load is supplied by the battery 10, the external load by the power bank 20, or the external load by both the battery 10 and the power bank 20, by turning the control loop on or off.

[0096] For example, an external load can be connected between the battery 10 and the connection module. When the battery 10 supplies power to the external load, the controller controls the connection module to turn off; when the power bank 20 supplies power to the external load, the controller controls the connection module to turn on, and the connection circuit of the battery 10 is turned off; when both the battery 10 and the power bank 20 supply power to the external load, the controller controls the connection module to turn on. The external load and the circuit can also be connected in other ways, without limitation.

[0097] Taking a vehicle as an external load as an example, when the vehicle is powered off and the power bank is mounted on the vehicle, the battery 10 and the power bank work together to provide static current to the vehicle. When the vehicle is powered off and the power bank 20 is mounted on the vehicle, the battery pack E with a high SOC can provide static current to the vehicle first. The remaining battery pack E and the battery 1010 only self-discharge. At the same time, since the battery pack E with a high SOC needs to be charged at the same time as other battery pack E and the battery 10, it needs to be left to stand still when it discharges to a certain extent. This will generate a self-discharge rate during the stand-up process to avoid over-discharge and balance the SOC. In order to prevent the battery pack E with a low SOC from participating in the power supply and causing damage to the battery pack E, the battery pack E should be planned to ensure the safety and health of each battery pack E. This increases the time that the vehicle can stand still in the stand-up state. In addition, according to the usage habits of car users, the capacity of the battery 1010 can be appropriately reduced and the charging and discharging frequency of the battery 1010 can be reduced to reduce the frequency and number of times the power battery is started when the vehicle is standing still.

[0098] The discharge duration of battery pack E can be referenced in formula (2), and the discharge duration of mobile power supply 20 can be referenced in formula (3), where C2 is the capacity of the battery pack. It should be noted that, since the onboard mobile energy storage cannot meet the requirements for vehicle startup, the SOC of battery pack E... min The lower limit of battery pack E can be taken.

[0099] (2)

[0100] (3)

[0101] For example, if the discharge time of battery pack E1 is tA, the discharge time of battery pack E2 is tB, ... up to tn, then tmax = tA + tB + ... tn. For battery pack E1, its discharge time is tA, and its resting time is at most tmax - tA.

[0102] For example, the storage battery 1010 has a capacity of 32Ah, a SOC of 95%, a self-discharge rate of 4%, and an Iqc of 20mA; the mobile power supply 20 includes battery packs E1, E2, and E3, with SOC values ​​of 60%, 50%, and 40%, respectively, a capacity of 32Ah, a self-discharge rate of 4%, and a minimum permissible SOC of 10%. According to formula (2), it is calculated that the longest period of inactivity for battery pack E is 63.16 days when battery 1010 is not used, while the longest period of inactivity for battery pack E is 90.98 days when battery 1010 is used. This is significantly longer than the 39.8 days when only battery 1010 is used. Thus, this application can support long-term parking of the vehicle and reduce the number of start-stop cycles of the high-voltage system. In the first 25.25 days, battery pack E1 handles the vehicle's static current and self-discharge, while other battery packs E and battery 1010 only experience self-discharge. After 25.25 days, battery pack E2 handles the vehicle's static current, while other battery packs E and battery 1010 only experience self-discharge. After 43.83 days, battery pack E3 handles the vehicle's static current, while other battery packs E and battery 1010 only experience self-discharge. After 55.74 days, battery 1010 handles the vehicle's static current, while other battery packs E only experience self-discharge. This continues until day 90.98, when all battery packs reach their permissible lower limits, at which point the vehicle can be activated to charge the power bank and battery 10. The SOC values ​​are shown in Table 1.

[0103] Table 1

[0104]

[0105] In some embodiments, when the power bank is in a static state and there is a voltage difference among the multiple battery cells, voltage balancing is performed among the multiple battery cells.

[0106] Specifically, there may be differences between the various battery packs E in the power bank 20. Therefore, the power bank 20 needs to actively perform voltage equalization. This can be done by sequentially controlling the battery pack E with the highest and lowest voltage for voltage equalization. When the voltage difference between the highest and lowest voltage battery pack E exceeds a first preset voltage range, the first switch K1 and the third switch K3 connected to them are changed to connect the two battery packs E in parallel for voltage equalization. After the two battery packs E have completed voltage equalization, the above operation is repeated until the voltage difference between the highest and lowest voltage battery pack E is less than a second preset voltage range, at which point the voltage equalization of the power bank 20 stops. The first and second preset voltage ranges can be set according to actual conditions and are not specifically limited here.

[0107] For example, such as Figure 5As shown, when the first switch K1a, the third switch K3a, the first switch K3c, and the third switch K3c are closed, the battery packs E1 and E3 perform voltage equalization.

[0108] Specifically, if the power bank 20 is not installed in a vehicle for use, the power bank 20 will involve a variety of different voltage and current outputs due to the different voltage and current requirements of the load. The output current can be increased by connecting different numbers of battery cells 1 in parallel, and the output voltage can be increased by connecting different numbers of battery cells 1 in series.

[0109] For example, such as Figure 3 As shown, when the first switch K1a, the third switch K3a, the first switch K1b, the third switch K3b and the first switch K1c are closed, and the second switch K2a, the second switch K2b, the second switch K2c and the third switch K3c are open, the battery unit 11, the battery unit 12 and the battery unit 13 are connected in parallel to increase the output current.

[0110] Or such as Figure 4 As shown, when the second switch K2a, the second switch K2b and the first switch K1c are closed, and the first switch K1a, the third switch K3a, the first switch K1b, the third switch K3b, the second switch K2c and the third switch K3c are open, the battery unit 11, the battery unit 12 and the battery unit 13 are connected in series, increasing the output voltage;

[0111] When selecting battery cell 1, battery cells with higher voltage can be preferentially selected and connected in series in the charging and discharging circuit.

[0112] In some embodiments, such as Figure 1 As shown, the connection module 30 includes a first filtering unit 3 and a second switching unit 4.

[0113] The first filter unit 3 is connected to the storage battery 1010; the second switch unit 4 is located between the first filter unit 3 and the mobile power supply 20, and the second switch unit 4 is used to control the connection module 30 to be turned on or off.

[0114] Specifically, the switching state of the control switch unit 3 controls the conduction and disconnection of the connection module 30, thereby controlling the mobile power supply 20 and the storage battery 10 to be connected to the charging and discharging circuit. When the switch unit 3 is closed, the connection module 30 is turned on, and the mobile power supply 20 and the storage battery 10 are connected to the charging and discharging circuit. When the switch unit 3 is opened, the connection module 30 is turned off, and the mobile power supply 20 can be disconnected from use.

[0115] In some embodiments, the first filtering unit 3 includes a first filtering subunit 31 and a second filtering subunit 32.

[0116] The first end of the first filter subunit 31 is connected to the positive terminal of the battery 10, and the second end of the first filter subunit 31 is connected to the first end of the second switch unit 4; the first end of the second filter subunit 32 is connected to the negative terminal of the battery 10, and the second end of the second filter subunit 32 is connected to the second end of the second switch unit 4.

[0117] Specifically, the first filter subunit 31 and the second filter subunit 32 can suppress high-frequency noise and instantaneous current fluctuations, so that the current entering the power supply 20 and the battery 1010 remains stable.

[0118] In some embodiments, such as Figure 1 As shown, the first filter subunit 31 includes a first inductor L1.

[0119] The first end of the first inductor L1 is connected to the positive terminal of the battery 10, and the second end of the first inductor L1 is connected to the first end of the second switching unit 4.

[0120] Specifically, the first inductor L1 is used to prevent sudden current changes and can suppress high-frequency noise and instantaneous current fluctuations, so that the current entering the power bank 20 and the battery 1010 remains stable.

[0121] In some embodiments, the second filter subunit 32 includes a second inductor L2.

[0122] The first end of the second inductor L2 is connected to the negative terminal of the battery 10, and the second end of the second inductor L2 is connected to the second end of the second switching unit 4.

[0123] Specifically, the second inductor L2 is used to prevent sudden current changes and can suppress high-frequency noise and instantaneous current fluctuations, so that the current entering the power bank 20 and the battery 1010 remains stable.

[0124] In some embodiments, such as Figure 1 As shown, the second switch unit 4 includes a fourth switch K4 and a fifth switch K5.

[0125] The first end of the fourth switch K4 is connected to the second end of the first filter subunit 31, and the second end of the fourth switch K4 is connected to the first end of the power supply 10; the first end of the fifth switch K5 is connected to the second end of the second filter subunit 32, and the second end of the fifth switch K4 is connected to the second end of the power supply 10.

[0126] Specifically, closing the fourth switch K4 and the fifth switch K5 turns on the connection module 30, connecting the power supply 20 and the battery 1010 into the circuit. Disconnecting the fourth switch K4 and the fifth switch K5 turns off the connection module 30, allowing the power supply 20 to be used independently.

[0127] In some embodiments, the connection module 30 further includes a first voltage regulator unit C1.

[0128] The first end of the first voltage regulator unit C1 is connected to the second end of the first filter subunit 31 and the first end of the second switch unit 4, and the second end of the first voltage regulator unit C1 is connected to the second end of the second filter subunit 32 and the second end of the second switch unit 4.

[0129] Specifically, the first voltage regulator unit C1 is used to smooth the voltage and ensure the voltage in the circuit is stable when the voltage of the power supply 20 and the battery 10 changes. The first voltage regulator unit C1 can be a capacitor. The combination of the first inductor L1, the second inductor L2 and the first voltage regulator unit C1 can effectively suppress the ripple in the power supply.

[0130] In some embodiments, such as Figure 1 As shown, circuit 100 also includes a sixth switch K6.

[0131] The first end of the sixth switch K6 is connected to the positive terminal of the battery 10, and the second end of the sixth switch K6 is connected to the first end of the second side to control the connection between the battery 10 and the outside.

[0132] Specifically, the sixth switch K6 isolates the battery 10 and controls the connection status between the battery 10 and the connection module 30. When the sixth switch K6 is disconnected, the battery 10 is not connected to the circuit, and the power battery 40 cannot charge the battery 10 and the mobile power supply 20. When the sixth switch K6 is closed, the battery 10 is connected to the circuit and can be charged and discharged normally.

[0133] In some embodiments, such as Figure 1 As shown, circuit 100 also includes a power battery 40 and a DC-DC module 50.

[0134] The first terminal of the DC-DC module 50 is connected to the positive terminal of the power battery 40, the second terminal of the DC-DC module 50 is connected to the negative terminal of the power battery 40, the third terminal of the DC-DC module 50 is connected to the second terminal and the first terminal on the second side of the sixth switch K6, and the fourth terminal of the DC-DC module 50 is connected to the negative terminal and the second terminal on the second side of the storage battery 10; the power battery 40 is used to charge the storage battery 10 and / or the mobile power supply 20.

[0135] Specifically, when the power battery 40 is powered on, it can provide energy to external loads and charge the storage battery 10 and / or the power bank 20. However, since the power battery 40 is in a high-voltage region while the storage battery 10 and the power bank 20 are in a low-voltage region, voltage mismatch during charging can lead to excessive current in the charging and discharging circuit, damaging the electronic components. Therefore, this application includes a DC-DC module 50 connected between the power battery 40 and the storage battery 10. Voltage conversion via the DC-DC module 50 ensures that the high voltage of the power battery 40 matches the different voltage requirements of the storage battery 10 and the power bank 20, preventing damage to electronic components due to voltage mismatch. Once the battery pack E has finished charging, it can disconnect from the circuit, for example, as... Figure 4 As shown, after battery pack E1 is fully charged, the first switch 1a is turned off, and battery pack E1 is disconnected from the circuit, while other battery packs E can still maintain normal charging status without being affected.

[0136] In some embodiments, the storage battery and / or power bank are also used to charge the power battery.

[0137] Specifically, when the power battery 40 is low on power, in order to ensure that the power battery 40 can operate normally, the second switch unit 4 can be closed, and the sixth switch K6 can be closed at the same time. Simultaneously, the battery unit 1 can be connected in parallel to the circuit, and the power battery 40 can be charged by the storage battery 10 or the mobile power supply 20.

[0138] In some embodiments, such as Figure 1 As shown, the DC-DC module 50 includes a second filter unit 5, an inverter unit 6, a third filter unit 7, and a transformer 8.

[0139] The input side of the second filter unit 5 is connected to the power battery 40; the input side of the inverter unit 6 is connected to the output side of the second filter unit 5; the main side of the transformer 8 is connected to the output side of the inverter unit 6; the input side of the third filter unit 7 is connected to the secondary side of the transformer 8, and the output side of the third filter unit 7 is connected to the storage battery 10.

[0140] Specifically, the second filter unit 5 filters out noise and fluctuations in the output voltage of the power battery 40, providing a stable DC input to the inverter unit 6. The inverter unit 6 converts the filtered DC voltage into a high-frequency AC voltage, which is then converted by the transformer 8. Finally, the third filter unit 7 filters the voltage output of the transformer 2, providing a stable DC output to the storage battery 1010 or the power bank 20.

[0141] In some embodiments, such as Figure 1 As shown, the second filtering unit 5 includes a third filtering subunit 51 and a fourth filtering subunit 52.

[0142] The first end of the third filter subunit 51 is connected to the positive terminal of the power battery 40, and the second end of the third filter subunit 51 is connected to the first input terminal of the inverter unit 6; the first end of the fourth filter subunit 52 is connected to the negative terminal of the power battery 40, and the second end of the fourth filter subunit 52 is connected to the second input terminal of the inverter unit 6.

[0143] Specifically, the third filter subunit 51 and the fourth filter subunit 52 can filter the DC power output from the power battery to provide a stable input to the inverter unit 6.

[0144] In some embodiments, such as Figure 1 As shown, the third filter subunit 51 includes a third inductor L3.

[0145] The first end of the third inductor L3 is connected to the positive terminal of the power battery 40, and the second end of the third inductor L3 is connected to the first input terminal of the inverter unit 6.

[0146] Specifically, the third inductor L3 is used to prevent sudden current changes and can suppress high-frequency noise and instantaneous current fluctuations.

[0147] In some embodiments, such as Figure 1 As shown, the fourth filter subunit includes the fourth inductor L4.

[0148] The first end of the fourth inductor L4 is connected to the negative terminal of the power battery 40, and the second end of the fourth inductor L4 is connected to the second input terminal of the inverter unit 6.

[0149] Specifically, the fourth inductor L4 is used to prevent sudden current changes and can suppress high-frequency noise and instantaneous current fluctuations.

[0150] In some embodiments, such as Figure 1 As shown, the inverter unit 6 includes a first bridge arm 61 and a second bridge arm 62.

[0151] Specifically, the first end of the first bridge arm 61 is connected to the second end of the third filter subunit 51, the second end of the first bridge arm 61 is connected to the second end of the fourth filter subunit 52, and the midpoint of the first bridge arm 61 is connected to the first end of the main side; the first end of the second bridge arm 62 is connected to the second end of the third filter subunit 51 and the first end of the first bridge arm 61, the second end of the second bridge arm 62 is connected to the second end of the fourth filter subunit 52 and the second end of the first bridge arm 61, and the midpoint of the second bridge arm 62 is connected to the second end of the main side.

[0152] Specifically, by turning on and off the first bridge arm 61 and the second bridge arm 62, the inverter unit 6 realizes the function of converting DC power into high-frequency AC power, thereby enabling voltage transformation through the transformer 8.

[0153] In some embodiments, such as Figure 1 As shown, the first bridge arm 61 includes a first power transistor Q1 and a second power transistor Q2.

[0154] Specifically, the first terminal of the first power transistor Q1 is connected to the second terminal of the third filter subunit 51, and the second terminal of the first power transistor Q1 is connected to the first terminal of the main side; the first terminal of the second power transistor Q2 is connected to the second terminal of the first power transistor Q1 and the first terminal of the main side, and the second terminal of the second power transistor Q2 is connected to the second terminal of the fourth filter subunit 52.

[0155] Specifically, by controlling the on and off states of the first power transistor Q1 and the second power transistor Q2, the inverter unit 6 converts DC power into high-frequency AC power, thereby enabling voltage transformation through the transformer 8.

[0156] In some embodiments, such as Figure 1 As shown, the second bridge arm 62 includes a third power transistor Q3 and a fourth power transistor Q4.

[0157] Specifically, the first end of the third power transistor Q3 is connected to the first end of the first power transistor Q1 and the second end of the third filter subunit 51, and the second end of the third power transistor Q3 is connected to the second end of the main side; the first end of the fourth power transistor Q4 is connected to the second end of the third power transistor Q3 and the second end of the main side, and the second end of the fourth power transistor Q4 is connected to the second end of the second power transistor Q2 and the second end of the fourth filter subunit 52.

[0158] Specifically, by controlling the on and off states of the third power transistor Q3 and the fourth power transistor Q4, the inverter unit 6 converts DC power into high-frequency AC power, thereby enabling voltage transformation through the transformer 8.

[0159] In some embodiments, the third filtering unit 7 includes a fifth filtering subunit 71 and a sixth filtering subunit 72.

[0160] Among them, the first end of the fifth filter subunit 71 is connected to the first end of the secondary side, and the second end of the fifth filter subunit 71 is connected to the first end of the sixth switch K6; the first end of the sixth filter subunit 72 is connected to the second end of the secondary side, and the second end of the sixth filter subunit 72 is connected to the negative terminal of the storage battery 10.

[0161] Specifically, under the filtering effect of the fifth filter subunit 71 and the sixth filter subunit 72, the power battery 40 can provide a stable current to the storage battery 10 or the mobile power supply 20.

[0162] In some embodiments, such as Figure 1 As shown, the fifth filter subunit 71 includes a fifth inductor L5.

[0163] Among them, the first end of the fifth inductor L5 is connected to the first end of the secondary side, and the second end of the fifth inductor L5 is connected to the first end of the sixth switch K6.

[0164] Specifically, the fifth inductor L5 is used to prevent sudden current changes and can suppress high-frequency noise and instantaneous current fluctuations, so that the power battery 40 can provide a stable current to the storage battery 1010 or the mobile power supply 20.

[0165] In some embodiments, such as Figure 1 As shown, the sixth filter subunit 72 includes a sixth inductor L6.

[0166] The first end of the sixth inductor L6 is connected to the second end of the secondary side, and the second end of the sixth inductor L6 is connected to the negative terminal of the battery 10.

[0167] Specifically, the sixth inductor L6 is used to prevent sudden current changes and can suppress high-frequency noise and instantaneous current fluctuations, so that the power battery 40 can provide a stable current to the storage battery 10 or the mobile power supply 20.

[0168] In some embodiments, such as Figure 1 As shown, the DC-DC module 50 also includes a second voltage regulator unit C2.

[0169] The first end of the second voltage regulator unit C2 is connected to the second end of the fifth filter subunit 71 and the first end of the sixth switch K6. The second end of the second voltage regulator unit C2 is connected to the second end of the sixth filter subunit 72 and the negative terminal of the battery 10.

[0170] Specifically, the second voltage regulator unit C2 is used to smooth the voltage and ensure the voltage stability in the charging and discharging circuit when the voltage at the power battery 40 changes. The second voltage regulator unit C2 can be a capacitor, so the combination of the fifth inductor L5, the sixth inductor L6 and the second voltage regulator unit C2 can effectively suppress the ripple in the power supply.

[0171] In some embodiments, such as Figure 1 As shown, the DC-DC module 50 also includes a rectifier unit 9.

[0172] The rectifier unit 9 is located between the secondary side and the input side of the third filter unit 7. The rectifier unit 9 is used to rectify the secondary voltage output by the transformer 8.

[0173] Specifically, since the secondary output voltage of transformer 8 is AC, it cannot directly charge battery 10 or power bank 20. A rectifier unit 9 converts the AC output from the secondary side of transformer 8 into DC, which is then further filtered by a third filter unit 7 to provide stable DC power to battery 10 or power bank 20. Simultaneously, since battery 10 and power bank 20 operate in a low-voltage region, voltage conversion is required to charge the high-voltage power battery 40. However, the conversion from low to high voltage results in excessive losses and low efficiency. Therefore, this application uses a rectifier unit to rectify the secondary voltage output from transformer 8, thereby preventing battery 10 or power bank 20 from charging power battery 40 and reducing energy loss. The rectifier unit 9 can be composed of electronic devices such as switching transistors, diodes, or MOSFETs; no specific limitations are imposed here.

[0174] In some embodiments, such as Figure 1 As shown, the rectifier unit 9 includes a first diode D1 and a second diode D2.

[0175] In this configuration, the anode of the first diode D1 is connected to the first end of the secondary side, and the cathode of the first diode D1 is connected to the first input terminal of the third filter unit 7; the anode of the second diode D2 is connected to the second end of the secondary side, and the cathode of the second diode D2 is connected to the second input terminal of the third filter unit 7.

[0176] Specifically, by utilizing the unidirectional conduction characteristic of diodes, the positive half-cycle voltage in the alternating current can be conducted to the third filter unit 7, while the negative half-cycle voltage is blocked, thereby achieving the rectification function.

[0177] It should be noted that, due to the unidirectional conduction characteristic of diodes, the circuit 100 of this application can only enable the power battery 40 to charge the storage battery 10 and / or the mobile power supply 20.

[0178] In some embodiments, the power bank and the connectivity module are detachably connected.

[0179] Specifically, the power bank 20 and the connection module 30 are detachably connected, which means that users can detach the power bank 20 and use it as a mobile power source. For example, the power bank 20 can be detached from the vehicle to power electronic products or for use in camping and other scenarios. Thus, the power bank 20 can be used flexibly without affecting the vehicle's functions.

[0180] A second aspect of this utility model provides a power supply device 200, such as... Figure 6 As shown, the power supply device 200 includes a circuit 100.

[0181] According to the embodiment of the present utility model, the power supply device 200 can both use the mobile power supply 20 to replenish the battery 10 and extend the resting time, and also use the battery 10 to replenish the mobile power supply 20 to ensure that the mobile power supply 20 has sufficient power. The mobile power supply 20 can be used flexibly, and the power battery 40 can be used to charge the battery 10 and / or the mobile power supply 20.

[0182] A third aspect embodiment of this utility model provides a charging and discharging system 1000, such as... Figure 4 As shown, the charging and discharging system 1000 includes a circuit 100.

[0183] According to the present invention, the charging and discharging system 1000 can use the mobile power supply 20 to replenish the battery 10 and extend the vehicle's idle time, and can also use the battery 10 to replenish the mobile power supply 20 to ensure that the mobile power supply 20 has sufficient power. The mobile power supply 20 can be used flexibly, and the power battery 40 can be used to charge the battery 10 and / or the mobile power supply 20.

[0184] In some embodiments, such as Figure 4 and Figure 8 As shown, the charging and discharging system 1000 also includes a control unit 300.

[0185] The control unit 300 is connected to the charging and discharging circuit 100 and is used to control the charging and discharging state of the storage battery 1010, the mobile power supply 20 or the power battery 40 in the charging and discharging circuit 100.

[0186] Specifically, the control unit 300 can time the vehicle's power-off time and calculate the resting time as T. off If the resting time has reached the maximum preset resting time, the control unit 300 sends a wake-up signal to the vehicle to wake up the power battery 40 and the DC-DC module 50. The control unit 300 then controls the connection module 30 and the sixth switch K6 to connect the battery 10 and the mobile power supply 20 to the circuit. This allows the mobile power supply 20 to replenish the battery 10, the battery 10 to replenish the mobile power supply 20, and the power battery 40 to charge the battery 10 and / or the mobile power supply 20. The circuit is disconnected after charging and discharging is complete. The maximum preset resting time can be set according to actual conditions and is not specifically limited here.

[0187] The fourth aspect of this utility model provides a vehicle, which includes a circuit 100, or a power supply device 200, or a charging and discharging system 1000.

[0188] According to the embodiments of the present invention, the vehicle can use the mobile power supply 20 to replenish the battery 10, extending the vehicle 2000's idle time, and can also use the battery 10 to replenish the mobile power supply 20, ensuring that the mobile power supply 20 has sufficient power, so that the mobile power supply 20 can be used flexibly.

[0189] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0190] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A circuit, characterized in that, include: Storage batteries and power banks; A connection module, which is connected to the storage battery and the power bank; When the connection module is turned on, a circuit is formed between the mobile power supply and the storage battery.

2. The circuit according to claim 1, characterized in that, The power bank includes at least one battery unit, and the at least one battery unit is connected to a first side of the connection module. The second side of the connection module is connected to the battery.

3. The circuit according to claim 2, characterized in that, The power bank includes multiple battery cells, which are connected in series and / or in parallel.

4. The circuit according to claim 3, characterized in that, Multiple battery cells may be selectively connected in series and / or in parallel.

5. The circuit according to claim 4, characterized in that, Each of the battery cells includes: Battery pack; A first switching unit is connected to the battery pack and adjacent battery units to control the series-parallel connection mode between the battery unit and the adjacent battery units.

6. The circuit according to claim 5, characterized in that, The first switching unit includes: A first switch, wherein a first end of the first switch is connected to a first end of the battery pack, and a second end of the first switch is connected to a second end of a first switch in the adjacent battery cell and a first end of the first side; A second switch, the first end of which is connected to the first end of the first switch and the first end of the battery pack, and the second end of which is connected to the second end of the battery pack in the adjacent battery cell; A third switch, wherein the first end of the third switch is connected to the second end of the battery pack, and the second end of the third switch is connected to the second end of the second switch; In this configuration, the second end of the battery pack of the first battery unit in the plurality of battery cells is connected to the second end of the first side.

7. The circuit according to claim 5 or 6, characterized in that, Multiple battery cells can be selectively connected to the circuit via the first switching unit.

8. The circuit according to any one of claims 1-6, characterized in that, The battery is used to charge the power bank through the circuit, or the power bank is used to charge the battery through the circuit, or the battery and / or the power bank is used to supply power to an external load.

9. The circuit according to any one of claims 1-6, characterized in that, The connection module includes: A first filtering unit is connected to the battery. The second switching unit is located between the first filtering unit and the mobile power supply, and is used to control the connection module to be turned on or off.

10. The circuit according to claim 9, characterized in that, The first filtering unit includes: A first filter subunit, wherein a first end of the first filter subunit is connected to the positive terminal of the battery, and a second end of the first filter subunit is connected to the first end of the second switch unit; The second filter subunit has its first end connected to the negative terminal of the battery and its second end connected to the second end of the second switch unit.

11. The circuit according to claim 10, characterized in that, The first filtering subunit includes: A first inductor, the first end of which is connected to the positive terminal of the battery, and the second end of which is connected to the first end of the second switching unit.

12. The circuit according to claim 10, characterized in that, The second filtering subunit includes: The second inductor has its first end connected to the negative terminal of the battery and its second end connected to the second end of the second switching unit.

13. The circuit according to any one of claims 10-12, characterized in that, The second switching unit includes: The fourth switch has its first end connected to the second end of the first filter subunit, and its second end connected to the first end of the power bank. The fifth switch has its first end connected to the second end of the second filter subunit, and its second end connected to the second end of the power supply.

14. The circuit according to claim 13, characterized in that, The connection module further includes: The first voltage regulator unit has a first terminal connected to the second terminal of the first filter subunit and the first terminal of the second switch unit, and a second terminal connected to the second terminal of the second filter subunit and the second terminal of the second switch unit.

15. The circuit according to claim 1 or 2, characterized in that, The circuit also includes: A sixth switch, the first end of which is connected to the positive terminal of the battery, and the second end of which is connected to the first end of the second side of the connection module, to control the connection between the battery and the outside.

16. The circuit according to claim 15, characterized in that, The circuit also includes: Power battery; The DC-DC module has a first terminal connected to the positive terminal of the power battery, a second terminal connected to the negative terminal of the power battery, a third terminal connected to the second terminal of the sixth switch and the first terminal of the second side, and a fourth terminal connected to the negative terminal of the battery and the second terminal of the second side. The power battery is used to charge the storage battery and / or the mobile power source.

17. The circuit according to claim 16, characterized in that, The storage battery and / or the mobile power source are also used to charge the power battery.

18. The circuit according to claim 16 or 17, characterized in that, The DC-DC module includes: The second filtering unit is connected to the power battery on its input side. An inverter unit, wherein the input side of the inverter unit is connected to the output side of the second filter unit; A transformer, wherein the main side of the transformer is connected to the output side of the inverter unit; The third filter unit has its input side connected to the secondary side of the transformer and its output side connected to the battery.

19. The circuit according to claim 18, characterized in that, The second filtering unit includes: The third filter subunit has its first end connected to the positive terminal of the power battery and its second end connected to the first input terminal of the inverter unit. The fourth filter subunit has its first end connected to the negative terminal of the power battery and its second end connected to the second input terminal of the inverter unit.

20. The circuit according to claim 19, characterized in that, The third filtering subunit includes: The third inductor has its first end connected to the positive terminal of the power battery and its second end connected to the first input terminal of the inverter unit.

21. The circuit according to claim 19, characterized in that, The fourth filtering subunit includes: The fourth inductor has its first end connected to the negative terminal of the power battery and its second end connected to the second input terminal of the inverter unit.

22. The circuit according to claim 19, characterized in that, The inverter unit includes: The first bridge arm has its first end connected to the second end of the third filter subunit, its second end connected to the second end of the fourth filter subunit, and its midpoint connected to the first end of the main side. The second bridge arm has its first end connected to the second end of the third filter subunit and the first end of the first bridge arm, its second end connected to the second end of the fourth filter subunit and the second end of the first bridge arm, and its midpoint connected to the second end of the main side.

23. The circuit according to claim 22, characterized in that, The first bridge arm includes: A first power transistor, the first end of which is connected to the second end of the third filter subunit, and the second end of which is connected to the first end of the main side; The second power transistor has its first end connected to the second end of the first power transistor and the first end of the main side, and its second end connected to the second end of the fourth filter subunit.

24. The circuit according to claim 23, characterized in that, The second bridge arm includes: The third power transistor has its first end connected to the first end of the first power transistor and the second end of the third filter subunit, and its second end connected to the second end of the main side. The fourth power transistor has its first end connected to the second end of the third power transistor and the second end of the main side, and its second end connected to the second end of the second power transistor and the second end of the fourth filter subunit.

25. The circuit according to claim 18, characterized in that, The third filtering unit includes: The fifth filter subunit has its first end connected to the first end of the secondary side, and its second end connected to the first end of the sixth switch. The sixth filter subunit has its first end connected to the second end of the secondary side, and its second end connected to the negative terminal of the battery.

26. The circuit according to claim 25, characterized in that, The fifth filtering subunit includes: The fifth inductor has its first end connected to the first end of the secondary side, and its second end connected to the first end of the sixth switch.

27. The circuit according to claim 25, characterized in that, The sixth filtering subunit includes: The sixth inductor has its first end connected to the second end of the secondary side, and its second end connected to the negative terminal of the battery.

28. The circuit according to claim 25, characterized in that, The DC-DC module also includes: The second voltage regulator unit has its first end connected to the second end of the fifth filter subunit and the first end of the sixth switch, and its second end connected to the second end of the sixth filter subunit and the negative terminal of the battery.

29. The circuit according to claim 18, characterized in that, The DC-DC module also includes: A rectifier unit is disposed between the secondary side and the input side of the third filter unit, and the rectifier unit is used to rectify the secondary voltage output by the transformer.

30. The circuit according to claim 29, characterized in that, The rectifier unit includes: The first diode has its anode connected to the first end of the secondary side and its cathode connected to the first input end of the third filter unit. The second diode has its anode connected to the second end of the secondary side, and its cathode connected to the second input terminal of the third filter unit.

31. The circuit according to claim 1, characterized in that, The power bank is detachably connected to the connection module.

32. A power supply device, characterized in that, Includes the circuit described in any one of claims 1-31.

33. A charging and discharging system, characterized in that, Includes the circuit described in any one of claims 1-31.

34. The charging and discharging system according to claim 33, characterized in that, Also includes: A control unit is connected to the circuit and is used to control the operating state of the circuit.

35. A vehicle, characterized in that, It includes the circuit according to any one of claims 1-31, or the power supply device according to claim 32, or the charging and discharging system according to claim 33 or 34.

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