Power supply system and vehicle

Abstract

The invention provides a power supply system and a vehicle, and belongs to the technical field of vehicles. The power supply system comprises a 48V battery, a load, a voltage regulating resistor, a relay, a power supply anode output end and a power supply cathode output end; the two ends of the load are electrically connected with the positive electrode of the 48V battery and the negative electrode of the 48V battery respectively; the voltage regulating resistor is provided with a first fixed end, a second fixed end and a regulating end, and the first fixed end is electrically connected with the negative electrode of the 48V battery; the first end of the relay is electrically connected with the second fixed end, and the second end of the relay is electrically connected with the positive electrode of the 48V battery; the power supply anode output end is electrically connected with the adjusting end; and the power supply negative electrode output end is electrically connected with the negative electrode of the 48V battery. By the adoption of the rescue device, the output voltage of the power supply positive electrode output end and the output voltage of the power supply negative electrode output end can be adjusted through the voltage adjusting resistor so that the output voltage can be matched with the whole vehicle voltage condition of the rescued vehicle, and therefore the safety during rescue is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a power supply system and a vehicle. Background Art

[0002] With the development of the automobile industry, the electrification of the entire vehicle is constantly being upgraded, and people's demand for the functions of the entire vehicle is also constantly increasing, resulting in more and more high-power devices being installed on the vehicle. The traditional 12V battery can no longer support these high-power devices, and the vehicle's 48V power supply system is gradually gaining popularity.

[0003] The vehicle's 12V power supply system and the vehicle's 48V power supply system each have their own advantages and disadvantages. Therefore, the two are not in a relationship of replacement and elimination, but a relationship of improvement and upgrading. As a result, there will be a situation where vehicles with 12V power supply systems coexist with vehicles with 48V power supply systems, and even vehicles with other low-voltage power supply systems.

[0004] However, there are compatibility issues between vehicles with different voltage power supply systems. When road rescue or emergency charging occurs, a vehicle with a 48V power supply system will generate a high voltage difference when charging a vehicle with a 12V power supply system, which can easily cause short-term high current and arcing, thereby posing a safety risk to people near the vehicle and reducing safety. Summary of the Invention

[0005] The present disclosure provides a power supply system and a vehicle, which can solve the technical problems existing in the related technologies. The technical solutions are as follows:

[0006] In one aspect, the present disclosure provides a power supply system, comprising a 48V battery, a load, a voltage regulating resistor, a relay, a positive power supply output terminal, and a negative power supply output terminal;

[0007] The two ends of the load are electrically connected to the positive electrode of the 48V battery and the negative electrode of the 48V battery respectively to form a main charging circuit for the load;

[0008] The voltage regulating resistor has a first fixed end, a second fixed end and an adjusting end, wherein the first fixed end is electrically connected to the negative electrode of the 48V battery;

[0009] The first end of the relay is electrically connected to the second fixed end, and the second end of the relay is electrically connected to the positive electrode of the 48V battery;

[0010] The power supply positive output terminal is electrically connected to the adjustment terminal;

[0011] The negative power supply output terminal is electrically connected to the negative pole of the 48V battery.

[0012] In a possible implementation, the voltage regulating resistor includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor, and the voltage regulating resistor has a first contact, a second contact, a third contact, a fourth contact, a fifth contact, a sixth contact, and a seventh contact;

[0013] The first contact is electrically connected to the first fixed end, the seventh contact is electrically connected to the second fixed end, the first resistor is electrically connected between the first contact and the second contact, the second resistor is electrically connected between the second contact and the third contact, the third resistor is electrically connected between the third contact and the fourth contact, the fourth resistor is electrically connected between the fourth contact and the fifth contact, the fifth resistor is electrically connected between the fifth contact and the sixth contact, and the sixth resistor is electrically connected between the sixth contact and the seventh contact.

[0014] In a possible implementation, when the adjustment end is electrically connected to the first contact, the output voltage of the positive power supply output end and the negative power supply output end is 0V;

[0015] When the regulating terminal is electrically connected to the second contact, the output voltage of the positive power supply output terminal and the negative power supply output terminal is 6V;

[0016] When the regulating terminal is electrically connected to the third contact, the output voltage of the positive power supply output terminal and the negative power supply output terminal is 12V;

[0017] When the regulating terminal is electrically connected to the fourth contact, the output voltage of the positive power supply output terminal and the negative power supply output terminal is 18V;

[0018] When the regulating terminal is electrically connected to the fifth contact, the output voltage of the positive power supply output terminal and the negative power supply output terminal is 24V;

[0019] When the regulating terminal is electrically connected to the sixth contact, the output voltage of the positive power supply output terminal and the negative power supply output terminal is 36V;

[0020] When the regulating end is electrically connected to the seventh contact, the output voltage of the positive power supply output end and the negative power supply output end is 48V.

[0021] In a possible implementation, a resistance ratio of the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor is 1:1:1:1:2:2.

[0022] In a possible implementation, the power supply system further includes a diode, wherein the anode of the diode is electrically connected to the first fixed end, and the cathode of the diode is electrically connected to the negative electrode of the 48V battery.

[0023] In a possible implementation, the power supply system further includes a voltage stabilizing device, and two ends of the voltage stabilizing device are electrically connected to the regulating end and the power supply positive output end respectively.

[0024] In a possible implementation, the voltage stabilizing device 8 includes a seventh resistor and a capacitor, two ends of the seventh resistor are electrically connected to the regulating end and the positive power supply output end, respectively, and the capacitor is connected in parallel with the seventh resistor.

[0025] In one possible implementation, the power supply system also includes a main positive relay and a main negative relay, wherein the two ends of the main positive relay are electrically connected to the positive pole of the 48V battery and one end of the load, respectively, and the two ends of the main negative relay are electrically connected to the negative pole of the 48V battery and the other end of the load, respectively.

[0026] In a possible implementation, the 48V battery is a 48V storage battery.

[0027] In another aspect, the present disclosure provides a vehicle, comprising the power supply system as described in any one of the above items.

[0028] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0029] The present disclosure provides a power supply system. When road rescue, emergency power supply, etc. occur, the power supply system can adjust the resistance value of the voltage regulating resistor according to the vehicle voltage of the rescued vehicle, thereby adjusting the output voltage of the positive power output terminal and the negative power output terminal, so that the output voltage matches the vehicle voltage of the rescued vehicle, thereby improving the safety during rescue.

[0030] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 is a schematic diagram of a circuit topology structure of a power supply system shown in an embodiment of the present disclosure;

[0033] Figure 2 is a structural diagram of a power supply system shown in an embodiment of the present disclosure;

[0034] Figure 3 Schematic diagram of an adjustment knob shown in an embodiment of the present disclosure.

[0035] Legend

[0036] 1. 48V battery; 2. Load; 3. Voltage regulating resistor; 4. Relay; 5. Positive power supply output terminal; 6. Negative power supply output terminal; 7. Diode; 8. Voltage regulator; 9. Main positive relay; 10. Main negative relay;

[0037] 11. The positive pole of the 48V battery; 12. The negative pole of the 48V battery;

[0038] 31. First fixed end; 32. Second fixed end; 33. Adjustment end;

[0039] 20. Adjustment knob. DETAILED DESCRIPTION

[0040] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present disclosure belongs. The words “first”, “second”, “third” and similar terms used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as “a” or “an” do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as “include” or “comprise” mean that the elements or objects appearing before “include” or “comprises” include the elements or objects listed after “include” or “comprises” and their equivalents, and do not exclude other elements or objects. Words such as “connect” or “connected” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0042] An embodiment of the present disclosure provides a power supply system, which can be a power supply system in a vehicle, used to supply power to various loads 2 in the vehicle to ensure the normal operation of the vehicle, and also used to charge other vehicles in the case of road rescue and emergency charging.

[0043] See also Figure 1 The power supply system includes a 48V battery 1, a load 2, a voltage regulating resistor 3, a relay 4, a positive power supply output terminal 5 and a negative power supply output terminal 6.

[0044] Among them, the 48V battery 1 can be a 48V battery, which can include a battery cell assembly part, a battery cell protection material, a BMS, a connecting line, an interface terminal and a shell, etc.

[0045] The battery cell assembly part can be a plurality of traditional lead-acid batteries connected in series and parallel, or a battery pack (cluster) made of lithium batteries connected in series and parallel to meet the requirements of the vehicle's 48V power supply system, or a battery pack (cluster) made of sodium batteries connected in series and parallel to meet the requirements. Of course, these battery assemblies are not limited to the above types, and other types of secondary batteries can also be made into a battery pack (cluster) that meets the requirements through a certain series and parallel relationship.

[0046] Traditional lead-acid batteries may include ordinary lead-acid batteries, flooded batteries, maintenance-free batteries, and include but are not limited to other lead-acid battery types listed above.

[0047] Lithium batteries can be one or more combinations of other types of secondary lithium-ion batteries, such as ternary batteries, lithium iron phosphate batteries, lithium manganese oxide batteries, lithium cobalt oxide batteries, lithium titanate batteries, etc. Battery structures can be one or more types of soft-pack batteries, cylindrical batteries, and prismatic hard-shell batteries.

[0048] The sodium battery can be one or more of a polyanion sodium-ion battery, a layered oxide sodium-ion battery, or a Prussian family sodium-ion battery. The battery structure can be one or more of a soft-pack battery, a cylindrical battery, or a prismatic hard-shell battery.

[0049] The battery cell protection material can be an insulating and high-temperature resistant material with a smooth surface, such as glass fiber board, epoxy board, or a soft deformation buffer material such as foam, which is used to protect the battery cell assembly.

[0050] The connection lines may include busbars, conductors, etc., made of metal materials with excellent conductive properties such as copper, aluminum, nickel, and adhesive layers, and are used for various electrical connections.

[0051] BMS is used for power management.

[0052] The interface terminals include communication interface, power output / input poles, see Figure 2 , may include the positive electrode 11 of the 48V battery 1, the negative electrode 12 of the 48V battery 1, the positive power supply output terminal 5 and the negative power supply output terminal 6. It can be understood that, see Figure 2 The negative electrode 12 of the 48V battery 1 can share the same terminal with the negative power supply output terminal 6.

[0053] The shell can be made of plastic, metal, alloy or other materials with excellent structural strength to wrap the entire battery pack.

[0054] Loads 2 are various loads powered by the power supply system's main charging circuit, such as the vehicle's engine, control module, lighting system, air conditioning system, and instrumentation. The two ends of load 2 are electrically connected to the positive electrode 11 and the negative electrode 12 of the 48V battery 1, respectively, to form the main charging circuit for load 2. The 48V battery 1 powers each load 2, ensuring its normal operation.

[0055] The voltage-regulating resistor 3 can also be called an adjustable resistor or a variable resistor. It has a first fixed terminal 31, a second fixed terminal 32, and an adjustment terminal 33. The first fixed terminal 31 is electrically connected to the negative terminal 12 of the 48V battery 1. The first terminal of the relay 4 is electrically connected to the second fixed terminal 32, and the second terminal of the relay 4 is electrically connected to the positive terminal 11 of the 48V battery 1.

[0056] That is, the first fixed end 31 and the second fixed end 32 of the voltage regulating resistor 3 can be connected in parallel to the positive electrode 11 and the negative electrode 12 of the 48V battery 1 through the relay 4. In this way, the maximum resistance of the voltage regulating resistor 3 is connected in parallel to the two ends of the 48V battery 1.

[0057] The regulating terminal 33 is electrically connected to the positive power supply output terminal 5 , and the negative power supply output terminal 6 is electrically connected to the negative electrode 12 of the 48V battery 1 .

[0058] In this way, when road rescue, emergency power supply, etc. occur, the user can electrically connect the positive power supply output terminal 5 and the negative power supply output terminal 6 to the rescued vehicle to charge the rescued vehicle. The power supply system can adjust the resistance value of the voltage regulating resistor 3 according to the overall voltage of the rescued vehicle, thereby adjusting the output voltage between the positive power supply output terminal 5 and the negative power supply output terminal 6, so that the output voltage matches the overall voltage of the rescued vehicle, thereby improving safety during rescue.

[0059] For example, when the vehicle voltage of the rescued vehicle is 12V, the position of the regulating end 33 of the voltage regulating resistor 3 can be adjusted to adjust the resistance value of the voltage regulating resistor 3, so that the output voltage between the positive power supply output terminal 5 and the negative power supply output terminal 6 is adjusted to 12V, thereby performing targeted charging for the rescued vehicle to avoid damage to the vehicle caused by 48V high-voltage charging, and also avoid short-term high current, arcing and other phenomena generated during 48V high-voltage charging, and avoid the occurrence of leakage and other situations, thereby improving safety during rescue.

[0060] The power supply system can charge the rescued vehicle for a short time to provide emergency assistance.

[0061] Relay 4 can control the conduction or disconnection of the charging circuit between the positive power supply output terminal 5 and the negative power supply output terminal 6. When it is necessary to power the rescued vehicle, the relay 4 can be controlled to close, so that the charging circuit between the positive power supply output terminal 5 and the negative power supply output terminal 6 is connected. When it is not necessary to power the rescued vehicle, the relay 4 can be controlled to disconnect, so that the charging circuit between the positive power supply output terminal 5 and the negative power supply output terminal 6 is disconnected.

[0062] In one possible implementation, see Figure 1 , the voltage regulating resistor 3 in the embodiment of the present disclosure can be set as follows:

[0063] The voltage regulating resistor 3 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, and has a first contact ①, a second contact ②, a third contact ③, a fourth contact ④, a fifth contact ⑤, a sixth contact ⑥ and a seventh contact ⑦.

[0064] The first contact ① is electrically connected to the first fixed end 31, the seventh contact ⑦ is electrically connected to the second fixed end 32, a first resistor R1 is electrically connected between the first contact ① and the second contact ②, a second resistor R2 is electrically connected between the second contact ② and the third contact ③, a third resistor R3 is electrically connected between the third contact ③ and the fourth contact ④, a fourth resistor R4 is electrically connected between the fourth contact ④ and the fifth contact ⑤, a fifth resistor R5 is electrically connected between the fifth contact ⑤ and the sixth contact ⑥, and a sixth resistor R6 is electrically connected between the sixth contact ⑥ and the seventh contact ⑦.

[0065] In this way, when it is necessary to adjust the output voltage between the positive power supply output terminal 5 and the negative power supply output terminal 6, the adjustment terminal 33 can be controlled to be electrically connected to one of the first contact ①, the second contact ②, the third contact ③, the fourth contact ④, the fifth contact ⑤, the sixth contact ⑥ and the seventh contact ⑦ to control the resistance value of the voltage regulating resistor 3 connected to the circuit.

[0066] When the adjustment terminal 33 is electrically connected to different contacts among the first contact ①, the second contact ②, the third contact ③, the fourth contact ④, the fifth contact ⑤, the sixth contact ⑥ and the seventh contact ⑦, the resistance value of the voltage regulating resistor 3 connected to the resistor is different, so that the output voltage between the positive power supply output terminal 5 and the negative power supply output terminal 6 is different, thereby realizing the adjustment of the rescue output voltage to match the vehicle voltage of the rescued vehicle.

[0067] In the embodiment of the present disclosure, different resistor combinations among the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 are connected to the circuit, which can realize different output voltages between the positive power supply output terminal 5 and the negative power supply output terminal 6. The output voltage and the resistance value of each resistor of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 can be set according to actual needs, and the embodiment of the present disclosure is not limited to this.

[0068] The following provides a possible way of setting different output voltages between the positive power supply output terminal 5 and the negative power supply output terminal 6 .

[0069] In a possible implementation, when the adjustment terminal 33 is electrically connected to the first contact ①, no resistor is connected to the circuit, the wire resistance is ignored, and the output voltage of the positive power supply output terminal 5 and the negative power supply output terminal 6 is 0V.

[0070] When the adjustment terminal 33 is electrically connected to the second contact ②, the first resistor R1 is connected to the circuit, and the positive power output terminal 5 and the negative power output terminal 6 obtain the voltage across the first resistor R1, and the output voltage is 6V.

[0071] When the adjustment terminal 33 is electrically connected to the third contact ③, the first resistor R1 and the second resistor R2 are connected to the circuit, and the positive power supply output terminal 5 and the negative power supply output terminal 6 obtain the voltage across the first resistor R1 and the second resistor R2, and the output voltage is 12V.

[0072] When the adjustment terminal 33 is electrically connected to the fourth contact ④, the first resistor R1, the second resistor R2, and the third resistor R3 are connected to the circuit, and the positive power supply output terminal 5 and the negative power supply output terminal 6 obtain the voltage across the first resistor R1, the second resistor R2, and the third resistor R3, and the output voltage is 18V.

[0073] When the adjustment terminal 33 is electrically connected to the fifth contact ⑤, the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are connected to the circuit, and the positive power supply output terminal 5 and the negative power supply output terminal 6 obtain the voltage across the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4, and the output voltage is 24V.

[0074] When the adjustment terminal 33 is electrically connected to the sixth contact ⑥, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, and the fifth resistor R5 are connected to the circuit, and the positive power supply output terminal 5 and the negative power supply output terminal 6 obtain the voltage across the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, and the fifth resistor R5, and the output voltage is 36V.

[0075] When the adjustment terminal 33 is electrically connected to the seventh contact ⑦, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 are connected to the circuit, and the positive power supply output terminal 5 and the negative power supply output terminal 6 obtain the voltage across the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6, and the output voltage is 48V.

[0076] In this way, through the above adjustment method, the output voltage of the positive power supply output terminal 5 and the negative power supply output terminal 6 can be adjusted between 0V, 6V, 12V, 18V, 24V, 36V, and 48V to achieve output of different voltages.

[0077] In one possible implementation, the resistance ratio of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 is 1:1:1:1:2:2 to achieve regulation between the above-mentioned different output voltages of 6V, 12V, 18V, 24V, 36V and 48V.

[0078] The specific resistance values ​​of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 can be any reasonable resistance values ​​that satisfy the above resistance value ratio. For example, the total resistance value of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 can be 480 mΩ, and the individual resistors can be allocated according to the above resistance value ratio.

[0079] In the embodiment of the present disclosure, when it is necessary to charge the rescued vehicle, the above-mentioned different output voltages can also be used to provide the rescued vehicle with sequential pre-charging operations from low voltage to high voltage. For example, when the rescued vehicle requires a charging voltage of 36V, the output voltages of the positive power output terminal 5 and the negative power output terminal 6 in the power supply system can be controlled to gradually convert from 6V, 12V, 18V, 24V to 36V to avoid the generation of instantaneous surge current, avoid safety hazards, and improve the safety of operation.

[0080] In one possible implementation, see Figure 1 The power supply system further includes a diode 7 , the anode of the diode 7 is electrically connected to the first fixed end 31 , and the cathode of the diode 7 is electrically connected to the negative electrode 12 of the 48V battery 1 .

[0081] In this way, the diode 7 limits the current direction of the charging circuit between the positive power supply output terminal 5 and the negative power supply output terminal 6, avoiding the reverse connection of the positive power supply output terminal 5 and the negative power supply output terminal 6 when charging the rescued vehicle, thereby improving operational safety.

[0082] In one possible implementation, see Figure 1 The power supply system further includes a voltage stabilizing device 8, and both ends of the voltage stabilizing device 8 are electrically connected to the regulating end 33 and the power supply positive output end 5 respectively.

[0083] In this way, the voltage stabilizing device 8 can avoid sudden voltage changes at the regulating end 33 when switching between various contacts, especially avoid sudden voltage increases, thereby improving the safety of rescue operations.

[0084] In a possible implementation, the voltage stabilizing device 8 includes a seventh resistor and a capacitor, the two ends of the seventh resistor are electrically connected to the regulating end 33 and the power supply positive output end 5 respectively, and the capacitor is connected in parallel with the seventh resistor.

[0085] Of course, in addition to the above circuit structure, the voltage stabilizing device 8 may also be any other reasonable circuit topology, which is not limited in the embodiment of the present disclosure.

[0086] In one possible implementation, the power supply system also includes a main positive relay 9 and a main negative relay 10, wherein the two ends of the main positive relay 9 are electrically connected to the positive pole 11 of the 48V battery 1 and one end of the load 2, respectively, and the two ends of the main negative relay 10 are electrically connected to the negative pole 12 of the 48V battery 1 and the other end of the load 2, respectively.

[0087] In this way, when the 48V battery 1 supplies power to the load 2, the main charging circuit can be turned on or off through the main positive relay 9 and the main negative relay 10, thereby improving the convenience of operation and control.

[0088] An embodiment of the present disclosure further provides a vehicle, comprising a power supply system as described above.

[0089] In one possible implementation, see Figure 2 and Figure 3 The vehicle also includes an adjustment knob 20, which can be electrically connected to the power supply system through the controller. The user can send different output voltage demand signals to the controller by rotating the adjustment knob 20. Based on the output voltage demand signal, the controller controls the resistance value of the voltage regulating resistor 3 to change so that the output voltage of the positive power supply output terminal 5 and the negative power supply output terminal 6 reaches the voltage value indicated by the adjustment knob 20.

[0090] For example, when the adjustment knob 20 points to OFF, the relay 4 is in the disconnected state; when the adjustment knob 20 points to 0V, the relay 4 changes from the disconnected state to the closed state, and the adjustment end 33 is electrically connected to the first contact ①; when the adjustment knob 20 points to 6V, the adjustment end 33 is electrically connected to the second contact ②; when the adjustment knob 20 points to 12V, the adjustment end 33 is electrically connected to the third contact ③; when the adjustment knob 20 points to 18V, the adjustment end 33 is electrically connected to the fourth contact ④; when the adjustment knob 20 points to 24V, the adjustment end 33 is electrically connected to the fifth contact ⑤; when the adjustment knob 20 points to 36V, the adjustment end 33 is electrically connected to the sixth contact ⑥; when the adjustment knob 20 points to 48V, the adjustment end 33 is electrically connected to the seventh contact ⑦.

[0091] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0092] The present disclosure provides a power supply system. When road rescue, emergency power supply, etc. occur, the power supply system can adjust the resistance value of the voltage regulating resistor 3 according to the vehicle voltage of the rescued vehicle, thereby adjusting the output voltage of the positive power supply output terminal 5 and the negative power supply output terminal 6, so that the output voltage matches the vehicle voltage of the rescued vehicle, thereby improving the safety during rescue.

[0093] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A power supply system, characterized in that: The power supply system comprises a 48V battery (1), a load (2), a voltage regulating resistor (3), a relay (4), a positive power supply output terminal (5) and a negative power supply output terminal (6); The two ends of the load (2) are electrically connected to the positive electrode (11) of the 48V battery (1) and the negative electrode (12) of the 48V battery (1) respectively, so as to form a main charging circuit of the load (2); The voltage regulating resistor (3) has a first fixed end (31), a second fixed end (32) and an adjusting end (33), wherein the first fixed end (31) is electrically connected to the negative electrode (12) of the 48V battery (1); The first end of the relay (4) is electrically connected to the second fixed end (32), and the second end of the relay (4) is electrically connected to the positive electrode (11) of the 48V battery (1); The power supply positive output terminal (5) is electrically connected to the regulating terminal (33); The power supply negative electrode output terminal (6) is electrically connected to the negative electrode (12) of the 48V battery (1).

2. The power supply system according to claim 1, characterized in that: The voltage regulating resistor (3) comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor, and the voltage regulating resistor (3) has a first contact, a second contact, a third contact, a fourth contact, a fifth contact, a sixth contact and a seventh contact; The first contact is electrically connected to the first fixed end (31), the seventh contact is electrically connected to the second fixed end (32), the first resistor is electrically connected between the first contact and the second contact, the second resistor is electrically connected between the second contact and the third contact, the third resistor is electrically connected between the third contact and the fourth contact, the fourth resistor is electrically connected between the fourth contact and the fifth contact, the fifth resistor is electrically connected between the fifth contact and the sixth contact, and the sixth resistor is electrically connected between the sixth contact and the seventh contact.

3. The power supply system according to claim 2, characterized in that: When the regulating terminal (33) is electrically connected to the first contact, the output voltage of the positive power supply output terminal (5) and the negative power supply output terminal (6) is 0V; When the regulating terminal (33) is electrically connected to the second contact, the output voltage of the positive power supply output terminal (5) and the negative power supply output terminal (6) is 6V; When the regulating terminal (33) is electrically connected to the third contact, the output voltage of the positive power supply output terminal (5) and the negative power supply output terminal (6) is 12V; When the regulating terminal (33) is electrically connected to the fourth contact, the output voltage of the positive power supply output terminal (5) and the negative power supply output terminal (6) is 18V; When the regulating terminal (33) is electrically connected to the fifth contact, the output voltage of the positive power supply output terminal (5) and the negative power supply output terminal (6) is 24V; When the regulating terminal (33) is electrically connected to the sixth contact, the output voltage of the positive power supply output terminal (5) and the negative power supply output terminal (6) is 36V; When the regulating terminal (33) is electrically connected to the seventh contact, the output voltage of the positive power supply output terminal (5) and the negative power supply output terminal (6) is 48V.

4. The power supply system according to claim 3, characterized in that: The resistance ratio of the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor is 1:1:1:1:2:

2.

5. The power supply system according to claim 1, wherein: The power supply system further comprises a diode (7), wherein the positive electrode of the diode (7) is electrically connected to the first fixed end (31), and the negative electrode of the diode (7) is electrically connected to the negative electrode (12) of the 48V battery (1).

6. The power supply system according to claim 1, characterized in that: The power supply system further includes a voltage stabilizing device (8), and two ends of the voltage stabilizing device (8) are electrically connected to the regulating end (33) and the power supply positive output end (5) respectively.

7. The power supply system according to claim 6, characterized in that: The voltage stabilizing device (8) includes a seventh resistor and a capacitor, wherein both ends of the seventh resistor are electrically connected to the regulating end (33) and the power supply positive output end (5) respectively, and the capacitor is connected in parallel with the seventh resistor.

8. The power supply system according to claim 1, wherein: The power supply system further comprises a main positive relay (9) and a main negative relay (10), wherein two ends of the main positive relay (9) are respectively electrically connected to the positive electrode (11) of the 48V battery (1) and one end of the load (2), and two ends of the main negative relay (10) are respectively electrically connected to the negative electrode (12) of the 48V battery (1) and the other end of the load (2).

9. The power supply system according to claim 1, wherein: The 48V battery (1) is a 48V storage battery.

10. A vehicle, characterized in that: The vehicle comprises the power supply system according to any one of claims 1 to 9.

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