A power adjustment method for a battery replacement cabinet, a multi-output charging system, and a battery replacement cabinet

Abstract

The application discloses a power adjustment method of a battery replacement cabinet, a multi-output charging system and the battery replacement cabinet, belongs to the technical field of battery replacement cabinets, and sets a default output power of each path after power-on. Meanwhile, the remaining allowed output power in the multi-output charging system is calculated, and the charging power of each path is dynamically adjusted according to the principle that the battery compartment that sends a charging request first is satisfied first. The application discloses a power adjustment method of a battery replacement cabinet, a multi-output charging system and the battery replacement cabinet, which can ensure that the battery that sends a charging request first is rapidly charged, shortens the charging time of the user while meeting the charging demand of the customer, maximizes the power utilization rate, and reduces the cost of the charger.

Description

Technical Field

[0001] This invention relates to the field of battery swapping cabinet technology, and in particular to a battery swapping cabinet power adjustment method, a multi-output charging system, and a battery swapping cabinet. Background Technology

[0002] In recent years, consumers' demand for online shopping and food delivery has been increasing, promoting the booming development of the food delivery market and the popularization of shared electric bicycles. As a result, electric vehicles are becoming increasingly popular as a means of material delivery and daily travel, leading to a surge in demand for battery swapping cabinets. In the actual operation of swapping cabinets, several empty compartments are typically used for battery transfer (first-in, last-out); or in areas with low turnover rates, some batteries may be fully charged. Therefore, generally speaking, the proportion of compartments charging in some areas at any given time is less than 50%. Consequently, to reduce equipment investment costs, charging systems with multiple outputs are becoming increasingly widely used in the market.

[0003] The structure of a commonly used multi-output charging system is as follows: Figure 1 As shown, the multi-output charging system includes a power factor correction unit 1, a first DC-DC converter 2, and a second DC-DC converter 3. The first terminal of the power factor correction unit 1 is connected to an AC power supply. AC The second end of the power factor correction unit 1 is connected to the first end of the first DC-DC converter unit 2, the second end of the first DC-DC converter unit 2 is connected to the first end of the second DC-DC converter unit 3, and the second end of the second DC-DC converter unit 3 is connected to the battery swapping cabinet slot 4. The second DC-DC converter unit 3 includes N DC-DC converter modules, specifically a first DC-DC converter module 31, a second DC-DC converter module 32, and so on up to the Nth DC-DC converter module 3N. The first ends of all N DC-DC converter modules are connected in parallel to the second end of the first DC-DC converter unit 2, where N is an integer. The battery swapping cabinet slot 4 includes N battery slots, specifically a first battery slot 41, a second battery slot 42, and so on up to the Nth battery slot 4N. The second end of the first DC-DC converter module 31 is connected in parallel to the first battery slot 41, the second end of the second DC-DC converter module 32 is connected in parallel to the second battery slot 42, and so on, until the second end of the Nth DC-DC converter module 3N is connected in parallel to the Nth battery slot 4N.

[0004] like Figure 1The multi-output charging system shown typically distributes power evenly across all outputs due to its constant total rated output power. However, in real-world applications, only one or a few outputs may require fast charging, while the remaining outputs may be idle or nearing the end of their charging process. If power is evenly distributed across all outputs, the currently charging output cannot operate at its maximum power, extending charging time and reducing the system's power utilization. Furthermore, if one or a few outputs fully utilize the system's maximum output power during charging, new users connecting to the system will face charging difficulties. Summary of the Invention

[0005] The present invention aims to provide a method for adjusting the power of a battery swapping cabinet, a multi-output charging system, and a battery swapping cabinet.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A method for adjusting the power of a battery swapping cabinet, comprising:

[0008] Step S1: Set the default output power of each channel of the multi-output charging system to P after power-on. o ;

[0009] Step S2: Based on the principle that the battery slot that first issues a charging request will have its set charging power satisfied first, allocate the output power of that channel; calculate the remaining allowed output power P in the multi-output charging system according to the following formula. a ,

[0010] ,

[0011] in, P represents the total actual output power of all outputs except for this output. t P is the rated total output power. i Let P be the actual output power value of the i-th channel, initially... i The default output power is N, where N is the number of output channels of the multi-output charging system, and N-1 is the number of output channels of the multi-output charging system other than this channel.

[0012] Step S3: Determine the remaining allowed output power P a Is it less than or equal to the maximum charging power P2 of each channel? If yes, proceed to step S4; otherwise, proceed to step S6.

[0013] Step S4: Determine the remaining allowed output power P a Is it less than or equal to the set charging power P of this circuit? s If yes, proceed to step S5; otherwise, proceed to step S6.

[0014] Step S5, according to the remaining allowed output power P a For charging this circuit, the default output power P is used. o Charge the remaining battery slots;

[0015] Step S6, according to the set charging power P of this circuit. s To charge this circuit, return to step S2 and calculate the output power of the next battery cell to issue a charging request.

[0016] The above-mentioned battery swapping cabinet power adjustment method further includes: if the battery in a certain battery slot is fully charged, its corresponding output power is released; according to the principle that the battery slot that first issues the charging request is first satisfied with the set charging power, steps S2 to S6 are repeated to redistribute the output power of each channel.

[0017] In one specific embodiment, the battery slot sends a charging request via RS485 or CAN.

[0018] This invention also provides a multi-output charging system that applies the above-described battery swapping cabinet power adjustment method, including a power factor correction unit, a first DC-DC converter unit, and a second DC-DC converter unit. The first end of the power factor correction unit is connected to AC power, and the second end of the power factor correction unit is connected to the first end of the first DC-DC converter unit. The second end of the first DC-DC converter unit is connected to the first end of the second DC-DC converter unit, and the second end of the second DC-DC converter unit is connected to a battery swapping cabinet slot. The second DC-DC converter unit includes N DC-DC converter modules, and the battery swapping cabinet slot includes N battery slots. The first end of each DC-DC converter module is connected to the second end of the first DC-DC converter unit, and the second end of each DC-DC converter module is connected to a battery slot.

[0019] In one specific embodiment, the above-mentioned multi-output charging system further includes a control unit and a charging monitoring unit. The charging monitoring unit is connected to the control unit and the battery swapping cabinet slot, and the control unit is connected to the second DC-DC converter unit.

[0020] In one specific embodiment, the power factor correction unit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a first inductor, a second inductor, a first switch, a second switch, and a first capacitor. The anode of the first diode is connected to a first terminal of an AC current source and the cathode of the second diode. The cathode of the first diode is connected to the cathode of the third diode. The anode of the third diode is connected to the cathode of the fourth diode and a second terminal of the AC current source. The anode of the fourth diode is connected to the anode of the second diode. The cathode of the third diode is connected to a first terminal of the first inductor and a first terminal of the second inductor. The second terminal of the first inductor is connected to the anode of the fifth diode. The second terminal of the second inductor is connected to the anode of the sixth diode. The cathode of the fifth diode is connected to the cathode of the sixth diode. The first terminal of the first switch is connected to the second terminal of the first inductor. The second terminal of the first switch is connected to the anode of the fourth diode. The first terminal of the second switch is connected to the second terminal of the second inductor. The second terminal of the second switch is connected to the anode of the fourth diode. The first terminal of the first capacitor is connected to the cathode of the fifth diode. The second terminal of the first capacitor is connected to the second terminal of the second switch. The first capacitor outputs a first DC current.

[0021] In one specific embodiment, the aforementioned first DC-DC conversion unit includes a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a third inductor, a first transformer, and a second transformer. The first terminal of the third switch is connected to the positive terminal of the first DC current, the second terminal of the third switch is connected to the first terminal of the fourth switch, and the second terminal of the fourth switch is connected to the negative terminal of the first DC current. The first terminal of the second capacitor is connected to the first terminal of the third switch, the second terminal of the second capacitor is connected to the first terminal of the third capacitor, the second terminal of the third capacitor is connected to the second terminal of the fourth switch, the second terminal of the third switch is connected to the first terminal of the third inductor, the second terminal of the third inductor is connected to the first terminal of the primary winding of the first transformer, the second terminal of the primary winding of the first transformer is connected to the first terminal of the third capacitor, and the first terminal of the secondary winding of the first transformer is connected to the first terminal of the fifth switch. The second terminal of the fourth capacitor is connected to the first terminal of the fourth capacitor, the second terminal of the fourth capacitor is connected to the middle terminal of the secondary winding of the first transformer, the second terminal of the secondary winding of the first transformer is connected to the first terminal of the sixth switch, and the second terminal of the sixth switch is connected to the second terminal of the fifth switch; the second terminal of the third inductor is connected to the first terminal of the primary winding of the second transformer, the second terminal of the primary winding of the second transformer is connected to the first terminal of the third capacitor, the first terminal of the secondary winding of the second transformer is connected to the first terminal of the seventh switch, the second terminal of the seventh switch is connected to the first terminal of the fifth capacitor, the second terminal of the fifth capacitor is connected to the middle terminal of the secondary winding of the second transformer, the second terminal of the secondary winding of the second transformer is connected to the first terminal of the eighth switch, the second terminal of the eighth switch is connected to the second terminal of the seventh switch, and the second terminal of the fourth capacitor is connected to the first terminal of the fifth capacitor. The first terminal of the fourth capacitor is the positive terminal of the second DC current, and the second terminal of the fifth capacitor is the negative terminal of the second DC current.

[0022] In one specific embodiment, the DC-DC converter module includes a ninth switch, a tenth switch, a seventh diode, an eighth diode, a fourth inductor, and a sixth capacitor. The positive terminal of the second DC current is connected to the first terminal of the ninth switch, the second terminal of the ninth switch is connected to the cathode of the seventh diode, the anode of the seventh diode is connected to the negative terminal of the second DC current, the cathode of the seventh diode is connected to the first terminal of the tenth switch via the fourth inductor, the second terminal of the tenth switch is connected to the anode of the seventh diode, the first terminal of the tenth switch is connected to the anode of the eighth diode, the cathode of the eighth diode is connected to the first terminal of the sixth capacitor, the second terminal of the sixth capacitor is connected to the second terminal of the tenth switch, the first terminal of the sixth capacitor is the positive terminal of the third DC current, and the second terminal of the sixth capacitor is the negative terminal of the third DC current.

[0023] In another specific embodiment, the DC-DC converter module includes an eleventh switch, a ninth diode, a fifth inductor, and a seventh capacitor. The positive terminal of the second DC current is connected to the first terminal of the eleventh switch, the second terminal of the eleventh switch is connected to the cathode of the ninth diode, the anode of the ninth diode is connected to the negative terminal of the second DC current, the second terminal of the eleventh switch is connected to the first terminal of the fifth inductor, the second terminal of the fifth inductor is connected to the first terminal of the seventh capacitor, the second terminal of the seventh capacitor is connected to the anode of the ninth diode, the first terminal of the seventh capacitor is the positive terminal of the third DC current, and the second terminal of the seventh capacitor is the negative terminal of the third DC current.

[0024] The present invention also provides a battery swapping cabinet, including a multi-output charging system as described above, and further including N battery slots, wherein the multi-output charging system supplies power to the N battery slots.

[0025] Beneficial effects: This invention provides a battery swapping cabinet power adjustment method, a multi-output charging system, and a battery swapping cabinet. To avoid certain charging channels completely occupying the total output power of the charging system and to prevent situations where new users cannot charge their batteries, a default output power is set for each channel after power-on. Simultaneously, the remaining allowed output power in the multi-output charging system is calculated. Based on the principle that the battery slot that first issues a charging request is prioritized for setting its charging power, the charging power of each channel is dynamically adjusted to ensure rapid charging of the battery that first issues a charging request. This not only meets customer charging needs but also shortens user charging time, maximizes power utilization, and reduces charger costs.

[0026] To make the above-mentioned features and advantages of the invention more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a commonly used multi-output charging system.

[0028] Figure 2 This is a flowchart of a power adjustment method for a battery swapping cabinet according to the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of a multi-output charging system according to the present invention.

[0030] Figure 4 for Figure 3 A circuit diagram of a specific embodiment of a medium power factor correction unit.

[0031] Figure 5 for Figure 3 A circuit diagram of a specific embodiment of the first DC-DC conversion unit.

[0032] Figure 6 for Figure 3 A circuit diagram of the first specific embodiment of the first DC-DC conversion module.

[0033] Figure 7 for Figure 3 A circuit diagram of the second specific embodiment of the first DC-DC conversion module. Detailed Implementation

[0034] To make the objectives and technical solutions of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] based on Figure 1 This invention provides a method for adjusting the power of a battery swapping cabinet in a multi-output charging system. For example... Figure 2 As shown, the power adjustment method for a battery swapping cabinet of the present invention includes the following steps.

[0036] Step S1: Set the default output power of each channel of the multi-output charging system to P after power-on. o .

[0037] More specifically, to avoid certain outputs from completely occupying the total output power rating P of the multi-output charging system during charging... t To prevent charging failures when a new battery is connected, the default output power of each channel in the multi-output charging system is set to P after power-on. o .

[0038] Step S2: Based on the principle that the battery slot that first issues a charging request is prioritized for receiving its set charging power, allocate the output power of that channel; calculate the remaining allowed output power P in the multi-output charging system according to the following formula. a ,

[0039] ,

[0040] in, P represents the total actual output power of all outputs except for this output. t P is the rated total output power. i Let P be the actual output power value of the i-th channel, initially... i The default output power is N, where N is the number of output channels of the multi-output charging system, and N-1 is the number of output channels of the multi-output charging system other than this channel.

[0041] Step S3: Determine the remaining allowed output power P a If the power is less than or equal to the maximum charging power P2 of each channel, proceed to step S4; otherwise, proceed to step S6.

[0042] Step S4: Determine the remaining allowed output power P a Is it less than or equal to the set charging power P of this circuit? s If yes, proceed to step S5; otherwise, proceed to step S6.

[0043] Step S5, according to the remaining allowed output power P a For charging this circuit, the default output power P is used. o Charge the remaining battery slots.

[0044] Step S6, according to the set charging power P of this circuit. s To charge this circuit, return to step S2 and calculate the output power of the next battery cell to issue a charging request.

[0045] Among them, the set charging power P of a certain channel s It is less than or equal to the maximum charging power P2.

[0046] Optionally, the battery slot can send a charging request via RS485 or CAN.

[0047] Furthermore, the power adjustment method for a battery swapping cabinet of the present invention further includes: if the battery in a certain battery slot is fully charged, its corresponding output power is released, and steps S2 to S6 are repeated according to the principle that the battery slot that first issues the charging request is first satisfied with the set charging power, and the output power of each channel is redistributed.

[0048] The following uses a six-output multi-output charging system as an example to introduce the working principle of the battery swapping cabinet power adjustment method of the present invention. The six-output multi-output charging system corresponds to powering a battery swapping cabinet with six battery slots. The total output power rating P... t The maximum charging power is 4.2kW, with a maximum charging power P2 of 1.5kW per channel and a set charging power P for each channel. s It also has a power output of 1.5kW, and each circuit can charge the battery in the battery compartment independently.

[0049] Initially, the default output power P1 of each channel is 30W; according to the formula The remaining allowed output power P is calculated. a = (4.2 - 0.03 - 0.03 - 0.03 - 0.03 - 0.03) kW = 4.05 kW, which is sufficient to charge the first battery slot that issued a charging request at a set charging power of 1.5 kW; then calculate the remaining allowed output power P.a = (4.2 - 1.5 - 0.03 - 0.03 - 0.03 - 0.03) kW = 2.58 kW, which is sufficient to charge the second battery slot that issued the charging request at a set charging power of 1.5 kW; recalculate the remaining allowed output power P. a = (4.2-1.5-1.5-0.03-0.03-0.03)kW=1.11kW, which is less than the maximum charging power of 1.5kW and the set charging power of 1.5kW. It can only charge the third battery slot that issued a charging request with the remaining allowed output power of 1.11kW, and charge the fourth, fifth and sixth battery slots that issued charging requests with the default output power P1=30W.

[0050] Furthermore, after a certain charging time, if the batteries in the first and second battery cells that issued charging requests are fully charged, the multi-output charging system issues a shutdown command to these two battery cells, releasing the 3kW output power used to charge them. Following the principle that the battery cell that issued the charging request first is prioritized for receiving its set charging power, the remaining allowed output power P is recalculated. a = (4.2 - 0.03 - 0.03 - 0.03 - 0.03 - 0.03) kW = 4.05 kW, which is enough to charge the third battery slot that issued a charging request at a set charging power of 1.5 kW; recalculate the remaining allowed output power P. a = (4.2 - 0.03 - 0.03 - 1.5 - 0.03 - 0.03) kW = 2.58 kW, which is enough to charge the fourth battery slot that issued the charging request at the set charging power of 1.5 kW; recalculate the remaining allowed output power P. a = (4.2-1.5-1.5-0.03-0.03-0.03)kW=1.11kW, which is less than the maximum charging power of 1.5kW and the set charging power of 1.5kW. Therefore, it can only charge the fifth battery slot that made a charging request with the remaining allowed output power of 1.11kW. The sixth battery slot that made a charging request will still be charged with the default output power P1=30W.

[0051] This invention also provides a multi-output charging system, which applies the above-mentioned battery swapping cabinet power adjustment method, such as... Figure 3 As shown, it also includes a power factor correction unit 1, a first DC-DC converter unit 2, and a second DC-DC converter unit 3. The first terminal of the power factor correction unit 1 is connected to an AC power supply. ACThe second end of the power factor correction unit 1 is connected to the first end of the first DC-DC converter unit 2, the second end of the first DC-DC converter unit 2 is connected to the first end of the second DC-DC converter unit 3, and the second end of the second DC-DC converter unit 3 is connected to the battery swapping cabinet slot 4. The second DC-DC converter unit 3 includes N DC-DC converter modules, specifically a first DC-DC converter module 31, a second DC-DC converter module 32, and so on up to the Nth DC-DC converter module 3N. The first ends of all N DC-DC converter modules are connected to the second end of the first DC-DC converter unit 2, where N is an integer. The battery swapping cabinet slot 4 includes N battery slots, specifically a first battery slot 41, a second battery slot 42, and so on up to the Nth battery slot 4N. The second end of the first DC-DC converter module 31 is connected in parallel to the first battery slot 41, the second end of the second DC-DC converter module 32 is connected in parallel to the second battery slot 42, and so on, until the second end of the Nth DC-DC converter module 3N is connected in parallel to the Nth battery slot 4N.

[0052] Furthermore, the multi-output charging system of the present invention also includes a control unit 5 and a charging monitoring unit 6. The charging monitoring unit 6 is connected to the control unit 5 and the battery swapping cabinet slot 4. The control unit 5 is connected to the second DC-DC converter unit 3.

[0053] More specifically, the power factor correction unit 1 will convert the AC power u AC The DC power is converted to DC voltage V1 and output to the first DC-DC converter unit 2. The first DC-DC converter unit 2 then converts DC voltage V1 to DC voltage V2 and outputs it to multiple DC-DC converter modules. The first DC-DC converter module 31, the second DC-DC converter module 32, and so on, until the Nth DC-DC converter module 3N converts DC voltage V2 to DC voltage V1 respectively. 31 DC V 32 Until DC V 3N This supplies power to the corresponding battery slot.

[0054] The charging monitoring unit 6 monitors the charging status of each battery slot, specifically, it monitors the charging requests issued by each battery slot and outputs them to the control unit 5.

[0055] According to the charging request of each battery slot, the control unit 5 outputs a drive signal to control the switch in each DC-DC converter module according to the power adjustment method of the battery swapping cabinet of the present invention, thereby controlling the charging power of each battery slot to achieve dynamic adjustment of the power of the battery swapping cabinet.

[0056] Figure 4 for Figure 3 A circuit diagram of a specific embodiment of the medium power factor correction unit 1. (See diagram below.) Figure 4 As shown, the power factor correction unit 1 includes diodes D1, D2, D3, D4, D5, and D6, inductors L1 and L2, switches Q1 and Q2, and capacitor C1. The anode of diode D1 is connected to AC current u. AC The first terminal is connected to the cathode of diode D2, the cathode of diode D1 is connected to the cathode of diode D3, and the anode of diode D3 is connected to the cathode of diode D4 and the AC current u. AC The second terminal of the circuit is connected as follows: the anode of diode D4 is connected to the anode of diode D2; the cathode of diode D3 is connected to the first terminal of inductor L1 and the first terminal of inductor L2; the second terminal of inductor L1 is connected to the anode of diode D5; the second terminal of inductor L2 is connected to the anode of diode D6; the cathode of diode D5 is connected to the cathode of diode D6; the first terminal of switch Q1 is connected to the second terminal of inductor L1; the second terminal of switch Q1 is connected to the anode of diode D4; the first terminal of switch Q2 is connected to the second terminal of inductor L2; the second terminal of switch Q2 is connected to the anode of diode D4; the first terminal of capacitor C1 is connected to the cathode of diode D5; the second terminal of capacitor C1 is connected to the second terminal of switch Q2; and DC current V1 is output from the two terminals of capacitor C1.

[0057] More specifically, the switches Q1 and Q2 are MOSFETs.

[0058] Optionally, the first DC-DC converter unit 2 adopts an isolated DC-DC converter circuit. Figure 5 for Figure 3 A circuit diagram of a specific embodiment of the first DC-DC converter unit 2. (See diagram below.) Figure 5As shown, the first DC-DC converter unit 2 includes switches Q3, Q4, Q5, Q6, Q7, and Q8; capacitors C2, C3, C4, and C5; an inductor L3; and transformers T1 and T2. The first terminal of switch Q3 is connected to the positive terminal of DC power V1; the second terminal of switch Q3 is connected to the first terminal of switch Q4; the second terminal of switch Q4 is connected to the negative terminal of DC power V1; the first terminal of capacitor C2 is connected to the first terminal of switch Q3; the second terminal of capacitor C2 is connected to the first terminal of capacitor C3; and the second terminal of capacitor C3 is connected to the second terminal of switch Q4. The first terminal of switch Q3... The second end is connected to the first end of the inductor L3. The second end of the inductor L3 is connected to the first end of the primary winding of the transformer T1. The second end of the primary winding of the transformer T1 is connected to the first end of the capacitor C3. The magnetizing inductor Lm1 is connected in parallel across the two ends of the primary winding of the transformer T1. The first end of the secondary winding of the transformer T1 is connected to the first end of the switch Q5. The second end of the switch Q5 is connected to the first end of the capacitor C4. The second end of the capacitor C4 is connected to the middle end of the secondary winding of the transformer T1. The second end of the secondary winding of the transformer T1 is connected to the first end of the switch Q6. The second end of the switch Q6 is connected to the second end of the switch Q5. The second end of inductor L3 is connected to the first end of the primary winding of transformer T2. The second end of the primary winding of transformer T2 is connected to the first end of capacitor C3. The first end of the secondary winding of transformer T2 is connected to the first end of switch Q7. The second end of switch Q7 is connected to the first end of capacitor C5. The second end of capacitor C5 is connected to the middle end of the secondary winding of transformer T2. The second end of the secondary winding of transformer T2 is connected to the first end of switch Q8. The second end of switch Q8 is connected to the second end of switch Q7. The second end of capacitor C4 is connected to the first end of capacitor C5. The first end of capacitor C4 is the positive terminal of DC power V2, and the second end of capacitor C5 is the negative terminal of DC power V2.

[0059] More specifically, switches Q3, Q4, Q5, Q6, Q7, and Q8 are MOSFETs.

[0060] Optionally, the first DC-DC converter module 31, the second DC-DC converter module 32, up to the Nth DC-DC converter module 3N are non-isolated DC-DC converter modules. Figure 6 for Figure 3 A circuit diagram of the first specific embodiment of the first DC-DC conversion module 31. (See diagram below.) Figure 6As shown, the first DC-DC converter module 31 is a BUCK-BOOST topology. The first DC-DC converter module 31 includes a switch Q9, a switch Q10, diodes D7 and D8, an inductor L4, and a capacitor C6. The positive terminal of the DC current V2 is connected to the first terminal of switch Q9, the second terminal of switch Q9 is connected to the cathode of diode D7, the anode of diode D7 is connected to the negative terminal of DC current V2, the cathode of diode D7 is connected to the first terminal of switch Q10 via inductor L4, the second terminal of switch Q10 is connected to the anode of diode D7, the first terminal of switch Q10 is connected to the anode of diode D8, the cathode of diode D8 is connected to the first terminal of capacitor C6, and the second terminal of capacitor C6 is connected to the second terminal of switch Q10. The first terminal of capacitor C6 is connected to the DC current V2. 31 The positive terminal of capacitor C6 is connected to a direct current V. 31 The negative electrode.

[0061] More specifically, the switches Q9 and Q10 are MOSFETs.

[0062] In this specific embodiment, the circuit topology of the second DC-DC converter module 32, up to the Nth DC-DC converter module 3N, is the same as that of the first DC-DC converter module 31, and will not be described again here.

[0063] Figure 7 for Figure 3 A circuit diagram of the second specific embodiment of the first DC-DC conversion module 31. (See diagram below.) Figure 7 As shown, the first DC-DC converter module 31 is a BUCK topology. The first DC-DC converter module 31 includes a switch Q11, a diode D9, an inductor L5, and a capacitor C7. The positive terminal of the DC current V2 is connected to the first terminal of the switch Q11. The second terminal of the switch Q11 is connected to the cathode of the diode D9. The anode of the diode D9 is connected to the negative terminal of the DC current V2. The second terminal of the switch Q11 is connected to the first terminal of the inductor L5. The second terminal of the inductor L5 is connected to the first terminal of the capacitor C7. The second terminal of the capacitor C7 is connected to the anode of the diode D9. The first terminal of the capacitor C7 is connected to the DC current V2. 31 The positive terminal of capacitor C7 is connected to a direct current V. 31 The negative electrode.

[0064] More specifically, the switch Q11 is a MOSFET.

[0065] In this specific embodiment, the circuit topology of the second DC-DC converter module 32, up to the Nth DC-DC converter module 3N, is the same as that of the first DC-DC converter module 31, and will not be described again here.

[0066] The present invention also provides a battery swapping cabinet, which includes the above-mentioned multi-output charging system and battery swapping cabinet slots. The battery swapping cabinet slots include multiple battery slots, and the multi-output charging system supplies power to the battery slots.

[0067] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for adjusting the power of a battery swapping cabinet, characterized in that, include, Step S1: Set the default output power of each channel of the multi-output charging system to P after power-on. o ; Step S2: Based on the principle that the battery slot that first issues a charging request is first satisfied with the set charging power, the output power of that circuit is allocated. The remaining permissible output power P in a multi-output charging system is calculated using the following formula. a , ， in, P represents the total actual output power of all outputs except for this output. t P is the rated total output power. i Let P be the actual output power value of the i-th channel, initially... i The default output power is N, where N is the number of output channels of the multi-output charging system, and N-1 is the number of output channels of the multi-output charging system other than this channel. Step S3: Determine the remaining allowed output power P a Is it less than or equal to the maximum charging power P2 of the battery cell to be charged? If yes, proceed to step S4; otherwise, proceed to step S6. Step S4: Determine the remaining allowed output power P a Is it less than or equal to the set charging power P of this circuit? s If yes, proceed to step S5; otherwise, proceed to step S6. Step S5, according to the remaining allowed output power P a For charging this circuit, the default output power P is used. o Charge the remaining battery slots; Step S6, according to the set charging power P of this circuit. s To charge this circuit, return to step S2 and calculate the output power of the next battery cell to issue a charging request.

2. The power adjustment method for a battery swapping cabinet as described in claim 1, characterized in that, It also includes that if the battery in a certain battery slot is fully charged, its corresponding output power is released, and the output power of each channel is redistributed by repeating steps S2 to S6 according to the principle that the battery slot that first issued the charging request is first satisfied with the set charging power.

3. The power adjustment method for a battery swapping cabinet as described in claim 1, characterized in that, The battery slot sends a charging request via RS485 or CAN.

4. A multi-output charging system, characterized in that, The battery swapping cabinet power adjustment method according to any one of claims 1-3 includes a power factor correction unit, a first DC-DC converter unit, and a second DC-DC converter unit. The first end of the power factor correction unit is connected to AC power, and the second end of the power factor correction unit is connected to the first end of the first DC-DC converter unit. The second end of the first DC-DC converter unit is connected to the first end of the second DC-DC converter unit, and the second end of the second DC-DC converter unit is connected to a battery swapping cabinet slot. The second DC-DC converter unit includes N DC-DC converter modules, and the battery swapping cabinet slot includes N battery slots. The first end of each DC-DC converter module is connected to the second end of the first DC-DC converter unit, and the second end of each DC-DC converter module is connected to a battery slot.

5. The multi-output charging system as described in claim 4, characterized in that, It also includes a control unit and a charging monitoring unit. The charging monitoring unit is connected to the control unit and the battery swapping cabinet slot. The control unit is connected to the second DC-DC converter unit.

6. The multi-output charging system as described in claim 4, characterized in that, The power factor correction unit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a first inductor, a second inductor, a first switch, a second switch, and a first capacitor. The anode of the first diode is connected to the first terminal of the AC current and the cathode of the second diode. The cathode of the first diode is connected to the cathode of the third diode. The anode of the third diode is connected to the cathode of the fourth diode and the second terminal of the AC current. The anode of the fourth diode is connected to the anode of the second diode. The cathode of the third diode is connected to the first terminal of the first inductor and the first terminal of the second inductor. The second terminal of the first inductor is connected to the anode of the fifth diode. The second terminal of the second inductor is connected to the anode of the sixth diode. The cathode of the fifth diode is connected to the cathode of the sixth diode. The first terminal of the first switch is connected to the second terminal of the first inductor. The second terminal of the first switch is connected to the anode of the fourth diode. The first terminal of the second switch is connected to the second terminal of the second inductor. The second terminal of the second switch is connected to the anode of the fourth diode. The first terminal of the first capacitor is connected to the cathode of the fifth diode. The second terminal of the first capacitor is connected to the second terminal of the second switch. The first capacitor outputs a first DC current.

7. The multi-output charging system as described in claim 6, characterized in that, The first DC-DC converter unit includes a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a third inductor, a first transformer, and a second transformer. The first terminal of the third switch is connected to the positive terminal of the first DC current. The second terminal of the third switch is connected to the first terminal of the fourth switch. The second terminal of the fourth switch is connected to the negative terminal of the first DC current. The first terminal of the second capacitor is connected to the first terminal of the third switch. The second terminal of the second capacitor is connected to the first terminal of the third capacitor. The second terminal of the third capacitor is connected to the second terminal of the fourth switch. The second terminal of the third switch is connected to the first terminal of the third inductor. The second terminal of the third inductor is connected to the first terminal of the primary winding of the first transformer. The second terminal of the primary winding of the first transformer is connected to the first terminal of the third capacitor. The first terminal of the secondary winding of the first transformer is connected to the first terminal of the fifth switch. The second terminal of the fifth switch is connected to... The first terminal of the fourth capacitor is connected to the middle terminal of the secondary winding of the first transformer. The second terminal of the secondary winding of the first transformer is connected to the first terminal of the sixth switch. The second terminal of the sixth switch is connected to the second terminal of the fifth switch. The second terminal of the third inductor is connected to the first terminal of the primary winding of the second transformer. The second terminal of the primary winding of the second transformer is connected to the first terminal of the third capacitor. The first terminal of the secondary winding of the second transformer is connected to the first terminal of the seventh switch. The second terminal of the seventh switch is connected to the first terminal of the fifth capacitor. The second terminal of the fifth capacitor is connected to the middle terminal of the secondary winding of the second transformer. The second terminal of the secondary winding of the second transformer is connected to the first terminal of the eighth switch. The second terminal of the eighth switch is connected to the second terminal of the seventh switch. The second terminal of the fourth capacitor is connected to the first terminal of the fifth capacitor. The first terminal of the fourth capacitor is the positive terminal of the second DC current, and the second terminal of the fifth capacitor is the negative terminal of the second DC current.

8. The multi-output charging system as described in claim 7, characterized in that, The DC-DC converter module includes a ninth switch, a tenth switch, a seventh diode, an eighth diode, a fourth inductor, and a sixth capacitor. The positive terminal of the second DC current is connected to the first terminal of the ninth switch, the second terminal of the ninth switch is connected to the cathode of the seventh diode, the anode of the seventh diode is connected to the negative terminal of the second DC current, the cathode of the seventh diode is connected to the first terminal of the tenth switch via the fourth inductor, the second terminal of the tenth switch is connected to the anode of the seventh diode, the first terminal of the tenth switch is connected to the anode of the eighth diode, the cathode of the eighth diode is connected to the first terminal of the sixth capacitor, the second terminal of the sixth capacitor is connected to the second terminal of the tenth switch, the first terminal of the sixth capacitor is the positive terminal of the third DC current, and the second terminal of the sixth capacitor is the negative terminal of the third DC current.

9. The multi-output charging system as described in claim 7, characterized in that, The DC-DC converter module includes an eleventh switch, a ninth diode, a fifth inductor, and a seventh capacitor. The positive terminal of the second DC current is connected to the first terminal of the eleventh switch, the second terminal of the eleventh switch is connected to the cathode of the ninth diode, the anode of the ninth diode is connected to the negative terminal of the second DC current, the second terminal of the eleventh switch is connected to the first terminal of the fifth inductor, the second terminal of the fifth inductor is connected to the first terminal of the seventh capacitor, the second terminal of the seventh capacitor is connected to the anode of the ninth diode, the first terminal of the seventh capacitor is the positive terminal of the third DC current, and the second terminal of the seventh capacitor is the negative terminal of the third DC current.

10. A battery swapping cabinet, characterized in that, The system includes a multi-output charging system as described in any one of claims 4-9, and further includes N battery slots, wherein the multi-output charging system supplies power to the N battery slots.

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