Power battery power supply system and vehicle

Abstract

The utility model relates to a power battery power supply system and a vehicle, the power battery power supply system comprises a switch assembly, a pre-charging assembly, a power supply assembly, a heating assembly and a control assembly, the switch assembly comprises first to fourth switch tubes, the first switch tube is connected with a main positive relay, a power battery and second to fourth switch tubes, and the second switch tube is further connected with the heating assembly; the third switch tube is also connected with the power supply assembly, and the fourth switch tube is also connected with the pre-charging assembly; the pre-charging assembly is also connected with the main positive relay and the high-voltage connector; the heating assembly is further connected with the power battery and the power supply assembly. The power supply assembly is connected with the battery management system, the storage battery and the whole vehicle load. The control assembly is connected with the control ends of the first to fourth switch tubes and is used for controlling the opening and closing states of the first to fourth switch tubes according to the power supply demand and / or the heating demand. Therefore, the problem that a vehicle cannot be powered on due to the fact that an existing power supply system is prone to power shortage is solved, space occupation is reduced, and meanwhile energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and particularly relates to a power battery power supply system and a vehicle. Background Art

[0002] In the field of new energy vehicles, since there is an X capacitor on the outer side of the two ports of the power battery, and the X capacitor has an instantaneous short circuit during the switching operation, which will damage the electrical appliances on the loop. Therefore, new energy vehicles need to perform pre-charging before powering on. The currently common pre-charging method in the industry is to use a pre-charge relay in series with a pre-charge resistor. When the voltage on the outer side of the two ports of the power battery rises to within 20% of the voltage inside the power battery, it is determined that the pre-charge function is completed, and then the normal power-on process is carried out.

[0003] In the related art, when the vehicle is not under high voltage, that is, the main positive and main negative relays are not closed, the high-voltage connector ports are not charged, and the low-voltage system of the whole vehicle is powered by the battery. When the vehicle is under high voltage, the DCDC (Direct Current to Direct Current) works, and the low-voltage system of the whole vehicle is powered by the DCDC output.

[0004] However, in cold winter, due to the great influence of low temperature on the chemical activity of the battery, the power battery is usually preheated to a suitable temperature before powering on or performing high-power charging and discharging operations. At the same time, the capacity of the low-voltage battery of the whole vehicle also decreases sharply in winter, and the problem of power shortage is likely to occur, resulting in the vehicle being unable to power on, which urgently needs to be solved. Utility Model Content

[0005] This application provides a power battery power supply system and a vehicle to solve the problems in the related art that the power supply system is prone to power shortage, resulting in the vehicle being unable to power on, etc., and while reducing the space occupation, the energy consumption is also reduced.

[0006] The first aspect embodiment of this application provides a power battery power supply system, including: a switch component, a pre-charge component, a power supply component, a heating component and a control component,

[0007] wherein, the switch component includes a first to fourth switching tube. The first end of the first switching tube is respectively connected to the positive pole of the main positive relay and the positive pole of the power battery. The second end of the first switching tube is respectively connected to the first end of the second switching tube, the first end of the third switching tube and the first end of the fourth switching tube. The second end of the second switching tube is connected to one end of the heating component. The second end of the third switching tube is connected to the first input end of the power supply component. The second end of the fourth switching tube is connected to one end of the pre-charge component;

[0008] The other end of the pre-charging component is respectively connected to the negative pole of the main positive relay and the high-voltage connector;

[0009] The other end of the heating component is respectively connected to the negative pole of the power battery and the second input end of the power supply component;

[0010] The output end of the power supply component is respectively connected to the battery management system, the storage battery and the vehicle load;

[0011] The control component is respectively connected to the control ends of the first switching tube, the second switching tube, the third switching tube and the fourth switching tube, and is used to control the opening and closing states of the first to fourth switching tubes according to the current power supply demand and / or the current heating demand.

[0012] Optionally, in some embodiments, the pre-charging component includes:

[0013] A first resistor, one end of the first resistor is connected to the second end of the fourth switching tube, and the other end of the first resistor is respectively connected to the negative pole of the main positive relay and the high-voltage connector.

[0014] Optionally, in some embodiments, the power supply component is a DCDC module, wherein the first input end of the DCDC module is connected to the second end of the third switching tube, the second input end of the DCDC module is connected to the negative pole of the power battery, and the output end of the DCDC module is respectively connected to the battery management system, the storage battery and the vehicle load.

[0015] Optionally, in some embodiments, the heating component includes:

[0016] A second resistor, one end of the second resistor is connected to the second end of the second switching tube;

[0017] A first fuse, one end of the first fuse is connected to the other end of the second resistor, and the other end of the first fuse is respectively connected to the negative pole of the power battery and the second input end of the power supply component.

[0018] Optionally, in some embodiments, the above-mentioned power battery power supply system further includes:

[0019] A current sensor, one end of the current sensor is connected to the negative pole of the power battery, and the other end of the current sensor is connected to the other end of the heating component;

[0020] A main negative relay arranged between the current sensor and the other end of the heating component.

[0021] Optionally, in some embodiments, the first switch tube, the fourth switch tube, the third switch tube, and the second switch tube are all power MOSFET tubes.

[0022] Optionally, in some embodiments, the above-mentioned power battery power supply system further includes:

[0023] A second fuse, one end of the second fuse is connected to the positive electrode of the power battery, and the other end of the second fuse is respectively connected to the switch assembly and one end of the main positive relay.

[0024] Optionally, in some embodiments, the above-mentioned power battery power supply system further includes:

[0025] A first detection component, the first detection component is connected to the power battery and is used to detect the current temperature of the power battery;

[0026] A first generation component, the first generation component is respectively connected to the first detection component and the control component, and is used to generate the current heating demand when the current temperature is lower than a preset temperature.

[0027] Optionally, in some embodiments, the above-mentioned power battery power supply system further includes:

[0028] A second detection component, the second detection component is connected to the storage battery and is used to detect the current voltage of the storage battery;

[0029] A second generation component, the second generation component is respectively connected to the second detection component and the control component, and is used to generate the current power supply demand when the current voltage is lower than a preset voltage.

[0030] According to the power battery power supply system provided by the embodiments of the present application, the first switch tube is respectively connected to the main positive relay, the power battery, and the second to fourth switch tubes. The second switch tube is further connected to the heating component, the third switch tube is further connected to the power supply component, and the fourth switch tube is further connected to the pre-charging component; the pre-charging component is further connected to the main positive relay and the high-voltage connector; the heating component is further respectively connected to the power battery and the power supply component; the power supply component is respectively connected to the battery management system, the storage battery, and the vehicle load; the control component is respectively connected to the control ends of the first to fourth switch tubes and is used to control the opening and closing states of the first to fourth switch tubes according to the current power supply demand and / or the current heating demand. Thus, the problems that the power supply system in the related technology is prone to power loss and causes the vehicle to be unable to be powered on are solved, and while reducing the space occupation, the energy consumption is reduced.

[0031] An embodiment of the second aspect of the present application provides a vehicle, including the above-mentioned power battery power supply system.

[0032] For the vehicle according to the present utility model, through the above-mentioned power battery power supply system, the first switching tube is respectively connected to the main positive relay, the power battery, the second to fourth switching tubes. The second switching tube is further connected to the heating component, the third switching tube is further connected to the power supply component, and the fourth switching tube is further connected to the pre-charging component. The pre-charging component is further connected to the main positive relay and the high-voltage connector. The heating component is further respectively connected to the power battery and the power supply component. The power supply component is respectively connected to the battery management system, the storage battery and the vehicle load. The control component is respectively connected to the control ends of the first to fourth switching tubes and is used to control the opening and closing states of the first to fourth switching tubes according to the current power supply demand and / or the current heating demand. Thereby, the problems in the related art that the power supply system is prone to power loss and the vehicle cannot be powered on are solved, and while reducing the space occupation, the energy consumption is reduced.

[0033] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and be easily understood from the following description of the embodiments in conjunction with the drawings, wherein:

[0035] Figure 1 FIG. is a schematic structural diagram of a power battery power supply system according to an embodiment of the present application;

[0036] Figure 2 FIG. is a schematic structural diagram of another power battery power supply system according to an embodiment of the present application.

[0037] Reference numerals: 10 - power battery power supply system, 100 - switching component, 200 - pre-charging component, 300 - power supply component, 400 - heating component, 500 - power battery, 600 - high-voltage connector, 700 - storage battery, 800 - vehicle load, 900 - current sensor, Relay1 - main positive relay, Relay2 - main negative relay, K1 - first switching tube, K2 - second switching tube, K3 - third switching tube, K4 - fourth switching tube, R1 - first resistor, R2 - second switch, S1 - first fuse, S2 - second fuse, BMS (Battery Management System) - battery management system, MCU (Motor Control Unit) - motor controller, EM (Electric Machinery) - motor, G1 - first relay, G2 - second relay, G3 - third relay. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0039] The power battery power supply system and vehicle according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0040] Specifically, Figure 1 is a schematic structural diagram of a power battery power supply system provided by an embodiment of the present application.

[0041] As Figure 1 shown, the power battery power supply system includes a switch assembly 100, a pre-charge assembly 200, a power supply assembly 300, a heating assembly 400, and a control assembly (not shown in the figure).

[0042] Among them, the switch assembly 100 includes a first switch tube K1 to a fourth switch tube K4. The first end of the first switch tube K1 is respectively connected to the positive electrode of the main positive relay Relay1 and the positive electrode of the power battery 500. The second end of the first switch tube K1 is respectively connected to the first ends of the second switch tube K2, the third switch tube K3, and the fourth switch tube K4. The second end of the second switch tube K2 is connected to one end of the heating assembly 400. The second end of the third switch tube K3 is connected to the first input end of the power supply assembly 300. The second end of the fourth switch tube K4 is connected to one end of the pre-charge assembly 200. The other end of the pre-charge assembly 200 is respectively connected to the negative electrode of the main positive relay Relay1 and the high-voltage connector 600. The other end of the heating assembly 400 is respectively connected to the negative electrode of the power battery 500 and the second input end of the power supply assembly 300. The output end of the power supply assembly 300 is respectively connected to the battery management system BMS, the storage battery 700, and the vehicle load 800. The control assembly is respectively connected to the control ends of the first switch tube K1, the second switch tube K2, the third switch tube K3, and the fourth switch tube K4, and is used to control the opening and closing states of the first to fourth switch tubes K4 according to the current power supply demand and / or the current heating demand.

[0043] It can be understood that under normal circumstances, since the currents in the pre-charge circuit, the heating circuit, and the power supply circuit do not exceed 10A, therefore, in the embodiments of the present application, a power MOSFET integrated switch module is adopted to replace the function of the traditional relay, that is, the first switch tube K1, the second switch tube K2, the third switch tube K3, and the fourth switch tube K4 are all power MOSFETs, realizing light weight and integration, and improving the reliability of the battery system. Among them, the rated current of a single power MOSFET can be 10 - 15A. Considering the design safety margin, the first switch tube K1 is arranged on the main circuit, and the remaining three switch tubes are arranged on each power-consuming branch circuit. In addition, the first switch tube K1, the second switch tube K2, the third switch tube K3, and the fourth switch tube K4 in the embodiments of the present application can also be other power switch substitutes, such as IGBT (Insulated Gate Bipolar Transistor), BJT (Bipolar Junction Transistor), etc. The series-parallel connection method of the first switch tube K1, the second switch tube K2, the third switch tube K3, and the fourth switch tube K4 can be selected according to the actual situation of the system, and no specific limitation is made here.

[0044] In addition, other relays (such as the main relay and the fast charge relay) in the power battery power supply system of the embodiments of the present application can select power switches according to requirements, thereby improving performance and space utilization.

[0045] Specifically, as Figure 1 shown, the first switch tube K1, the second switch tube K2, the third switch tube K3, and the fourth switch tube K4 are used to control the on-off of the current path. Among them, the first switch tube K1 is connected to the positive electrode of the power battery 500 and the positive electrode of the main positive relay Relay1, and at the same time serves as the common node of the other three switch tubes. The second switch tube K2 controls the current flowing to the heating component 400. The third switch tube K3 controls the current flowing to the power supply component 300. The fourth switch tube K4 controls the current flowing to the pre-charge component 200.

[0046] Further, one end of the pre-charge component 200 is connected to the fourth switch tube K4, and the other end is connected to the negative electrode of the main positive relay Relay1 and the high-voltage connector 600. Among them, the pre-charge component 200 is the first resistor R1. One end of the first resistor R1 is connected to the second end of the fourth switch tube K4, and the other end of the first resistor R1 is respectively connected to the negative electrode of the main positive relay Relay1 and the high-voltage connector 600.

[0047] Thus, the fourth switch tube K4 and the first resistor R1 cooperate to perform the pre-charge process before power-on, which is used to limit the inrush current during power-on, protect the vehicle's electronic system, and avoid damage to the circuit caused by a large inrush current.

[0048] Further, the input end of the power supply component 300 is connected to the third switching transistor K3 and the heating component 400. The first output end of the power supply component 300 is connected to the battery management system BMS, the storage battery 700, and the vehicle load 800. The power supply component 300 is used to convert the energy of the power battery 500 into appropriate voltage and current levels for use by various systems of the vehicle.

[0049] Further, one end of the heating component 400 is connected to the second switching transistor K2, and the other end is connected to the negative electrode of the power battery 500 and the second input end of the power supply component 300. The heating component 400 is used to increase the operating temperature of the power battery in a low-temperature environment to ensure the performance and lifespan of the battery.

[0050] Further, the control component is connected to the control ends of the first switching transistor K1 to the fourth switching transistor K4 through signal lines, and controls the opening and closing states of the respective switching transistors according to the current power supply demand and heating demand.

[0051] Specifically, if it is necessary to heat the power battery 500, the control component controls the second switching transistor K2 to conduct, and the current flows from the positive electrode of the power battery 500 through the first switching transistor K1 and the second switching transistor K2 to the heating component 400. The heating component 400 generates heat and transfers it to the power battery 500. At the initial stage of startup, the fourth switching transistor K4 is controlled by the control component to conduct, allowing current to pass through the pre-charge component 200 for pre-charging to prevent large inrush currents.

[0052] It should be noted that in the embodiment of the present application, the switching component 100 realizes the switching function under the control of the battery management system BMS. The specific strategy can be formulated by the vehicle manufacturer according to the actual situation. For example, when the battery management system BMS detects that the voltage of the storage battery 700 is lower than 11V, it controls the third switching transistor K3 to conduct to charge the storage battery 700, and at the same time, the power supply component 300 outputs to supply low voltage. Under this strategy, the function of the battery management system BMS never powering off can be realized (wherein, there is no requirement for the SOC of the power battery, and it is recommended that the SOC of the power battery ≥ 5%).

[0053] Among them, in some embodiments, the power supply component 300 is a DCDC module. Among them, the first input end of the DCDC module is connected to the second end of the third switching transistor K3, the second input end of the DCDC module is connected to the negative electrode of the power battery 500, and the output end of the DCDC module is respectively connected to the battery management system BMS, the storage battery 700, and the vehicle load 800.

[0054] Most of the DCDC power on the current market is about 50W. One degree of electricity can operate normally for 20 hours, which can ensure that the battery is monitored for 24 hours and other intelligent strategies. In addition, the third switching tube K3 can also be selected in the normally closed form to replace the above software strategy. The vehicle's battery 700 can be backed up with low-cost, low-weight, and low-capacity products, thereby improving the cost performance of the vehicle.

[0055] Thus, through the built-in DCDC method, low-voltage power consumption is achieved, and the problem of vehicle paralysis in the case of battery failure is solved.

[0056] Optionally, in some embodiments, the heating component 400 includes: a second resistor R2, one end of the second resistor R2 is connected to the second end of the second switching tube K2; a first fuse S1, one end of the first fuse S1 is connected to the other end of the second resistor R2, and the other end of the first fuse S1 is respectively connected to the negative electrode of the power battery 500 and the second input end of the power supply component 300.

[0057] Optionally, the first fuse S1 can be a fuse.

[0058] Specifically, in the embodiment of the present application, the second resistor R2 converts electrical energy into heat energy to heat the power battery 500, ensuring that the power battery 500 can still operate normally under low-temperature conditions. In a low-temperature environment, the internal resistance of the battery increases and the charging efficiency decreases. The second resistor R2 can help the power battery 500 reach the optimal operating temperature faster and improve the charge and discharge efficiency of the power battery 500.

[0059] In addition, in the heating circuit, if problems such as overcurrent or short circuit occur, the first fuse S1 in the heating component 400 will blow within a short time, quickly cutting off the power to prevent overcurrent or short circuit from damaging the heating resistor and other components, and protecting the safety of vehicle occupants and the battery system.

[0060] Optionally, in some embodiments, the above-mentioned power battery power supply system further includes: a current sensor 900, one end of the current sensor 900 is connected to the negative electrode of the power battery 500, and the other end of the current sensor 900 is connected to the other end of the heating component 400; a main negative relay Relay2 disposed between the current sensor 900 and the other end of the heating component 400.

[0061] Specifically, common devices of the current sensor 900 can be Hall or shunt. It works based on the Hall effect principle and measures the current by detecting the change of the magnetic field; or a low-value resistor is used to indirectly measure the current by measuring the voltage drop across the resistor.

[0062] The current between the main positive relay and the main negative relay is monitored by the current sensor 900 to ensure normal energy transfer between the battery and the whole vehicle.

[0063] Optionally, in some embodiments, the above-mentioned power battery power supply system further includes: a second fuse S2. One end of the second fuse S2 is connected to the positive electrode of the power battery 500, and the other end of the second fuse S2 is respectively connected to the switch assembly 100 and one end of the main positive relay Relay1.

[0064] Optionally, the second fuse S2 can be a fuse.

[0065] It can be understood that when there is an overcurrent or short circuit in the high-voltage circuit of the power battery power supply system, serious safety accidents such as fires or electric shocks may occur. Therefore, the second fuse S2 is needed to provide immediate protection.

[0066] Specifically, when the current in the high-voltage circuit exceeds a predetermined safety threshold, the second fuse S2 will quickly blow, cutting off the current flow, thereby protecting other components in the circuit from damage caused by overcurrent. Or, in the case of a short circuit in the high-voltage circuit, the main fuse will immediately blow, cutting off the current and protecting the safety of passengers and loads.

[0067] Optionally, in some embodiments, the above-mentioned power battery power supply system further includes: a first detection component connected to the power battery 500 for detecting the current temperature of the power battery 500; a first generation component respectively connected to the first detection component and the control component for generating a current heating demand when the current temperature is lower than a preset temperature.

[0068] Among them, the first detection component can be a temperature sensor, and the preset temperature can be a temperature preset by those skilled in the art, such as 5°C, which is not specifically limited here.

[0069] Specifically, the current temperature of the power battery 500 is detected by the first detection component. When the temperature of the power battery 500 is too low, the first generation component is used to generate a current heating demand, and the generated current heating demand is transmitted to the control component, so that the control component controls the operation of the heating component 400 according to the heating demand signal, thereby realizing heating of the power battery 500.

[0070] Optionally, in some embodiments, the above-mentioned power battery power supply system further includes: a second detection component connected to the storage battery 700 for detecting the current voltage of the storage battery 700; a second generation component respectively connected to the second detection component and the control component for generating a current power supply demand when the current voltage is lower than a preset voltage.

[0071] Among them, the second detection component can be a voltage sensor, and the preset voltage can be a voltage preset by those skilled in the art, such as 10V, which is not specifically limited herein.

[0072] Specifically, the current voltage of the storage battery 700 is detected by the second detection component. When the voltage of the storage battery 700 is too low, the second generation component generates the current power supply demand and transmits the generated current power supply demand to the control component, so that the control component controls the operation of the power supply component 300 according to the current power supply demand signal. For example, the DCDC module supplies power from the power battery 500 to the storage battery 700 to maintain the normal operation of the low-voltage system.

[0073] In addition, as another possible implementation method, as Figure 2 shown, in the embodiment of the present application, the first switch tube K1 can also be removed, the second switch tube K2 is replaced with the first relay G1, the third switch tube K3 is replaced with the second relay G2, and the fourth switch tube K4 is replaced with the third relay G3. Thus, the opening and closing of the second relay G2 are controlled by the BMS. When the vehicle is not powered on with high voltage, only the second relay G2 needs to be closed to charge the storage battery 700, and the vehicle can be supplied with low-voltage power output by the power supply component 300 (DCDC module), thereby solving the problem that the DCDC of the electric vehicle only starts after the battery is powered on with high voltage, and when the voltage of the low-voltage storage battery is too low, the vehicle cannot be powered on with high voltage.

[0074] According to the power battery power supply system provided by the embodiment of the present application, the first switch tube is respectively connected to the main positive relay, the power battery, the second to fourth switch tubes. The second switch tube is also connected to the heating component. The third switch tube is also connected to the power supply component. The fourth switch tube is also connected to the pre-charging component. The pre-charging component is also connected to the main positive relay and the high-voltage connector. The heating component is also respectively connected to the power battery and the power supply component. The power supply component is respectively connected to the battery management system, the storage battery and the vehicle load. The control component is respectively connected to the control ends of the first to fourth switch tubes and is used to control the opening and closing states of the first to fourth switch tubes according to the current power supply demand and / or the current heating demand. Thus, the problems in the related art that the power supply system is prone to power loss and the vehicle cannot be powered on are solved, and while reducing the space occupation, the energy consumption is reduced.

[0075] The present utility model also provides a vehicle, including the above-mentioned power battery power supply system.

[0076] For the vehicle according to the present utility model, through the above-mentioned power battery power supply system, the first switching tube is respectively connected to the main positive relay, the power battery, and the second to fourth switching tubes. The second switching tube is further connected to the heating component, the third switching tube is further connected to the power supply component, and the fourth switching tube is further connected to the pre-charging component. The pre-charging component is further connected to the main positive relay and the high-voltage connector. The heating component is further respectively connected to the power battery and the power supply component. The power supply component is respectively connected to the battery management system, the storage battery, and the vehicle load. The control component is respectively connected to the control ends of the first to fourth switching tubes and is used to control the opening and closing states of the first to fourth switching tubes according to the current power supply demand and / or the current heating demand. Thereby, problems such as low space utilization rate of the power supply system in the related art are solved, and while reducing space occupation, energy consumption is reduced.

[0077] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or N embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0078] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0079] Any process or method description shown in the flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a customized logic function or process. The scope of the preferred embodiments of the present application includes additional implementations, where the functions can be executed in a manner that is not shown or discussed, including in a substantially simultaneous manner or in a reverse order according to the involved functions, which should be understood by those skilled in the art of the embodiments of the present application.

[0080] The logic and / or steps represented in the flowchart or otherwise described herein can, for example, be considered as a definitional list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection unit (electronic device) having one or N wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, as the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or otherwise processing as appropriate, and then storing it in a computer memory.

[0081] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0082] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the method of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0083] In addition, each functional unit in various embodiments of the present application may be integrated into one processing module, may exist separately as individual physical units, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0084] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A power battery power supply system, characterized in that, Including: A switch component, a pre-charge component, a power supply component, a heating component and a control component. Wherein, the switch component includes a first to a fourth switching tube. The first end of the first switching tube is respectively connected to the positive pole of the main positive relay and the positive pole of the power battery. The second end of the first switching tube is respectively connected to the first end of the second switching tube, the first end of the third switching tube and the first end of the fourth switching tube. The second end of the second switching tube is connected to one end of the heating component. The second end of the third switching tube is connected to the first input end of the power supply component. The second end of the fourth switching tube is connected to one end of the pre-charge component. The other end of the pre-charge component is respectively connected to the negative pole of the main positive relay and the high-voltage connector. The other end of the heating component is respectively connected to the negative pole of the power battery and the second input end of the power supply component. The output end of the power supply component is respectively connected to the battery management system, the storage battery and the vehicle load. The control component is respectively connected to the control end of the first switching tube, the control end of the second switching tube, the control end of the third switching tube and the control end of the fourth switching tube, and is used to control the opening and closing states of the first to fourth switching tubes according to the current power supply demand and / or the current heating demand.

2. The system according to claim 1, wherein The pre-charge component includes: A first resistor. One end of the first resistor is connected to the second end of the fourth switching tube. The other end of the first resistor is respectively connected to the negative pole of the main positive relay and the high-voltage connector.

3. The system according to claim 1, wherein The power supply component is a DCDC module. Wherein, the first input end of the DCDC module is connected to the second end of the third switching tube. The second input end of the DCDC module is connected to the negative pole of the power battery. The output end of the DCDC module is respectively connected to the battery management system, the storage battery and the vehicle load.

4. The system according to claim 1, wherein The heating component includes: A second resistor. One end of the second resistor is connected to the second end of the second switching tube. A first fuse. One end of the first fuse is connected to the other end of the second resistor. The other end of the first fuse is respectively connected to the negative pole of the power battery and the second input end of the power supply component.

5. The system according to claim 1, wherein It further includes: A current sensor. One end of the current sensor is connected to the negative pole of the power battery. The other end of the current sensor is connected to the other end of the heating component. A main negative relay arranged between the current sensor and the other end of the heating component.

6. The system according to claim 1, wherein The first switching tube, the fourth switching tube, the third switching tube and the second switching tube are all power MOSFET tubes.

7. The system according to claim 1, wherein It further includes: A second fuse. One end of the second fuse is connected to the positive pole of the power battery. The other end of the second fuse is respectively connected to the switch component and one end of the main positive relay.

8. The system according to claim 1, characterized in that, It further includes: A first detection component. The first detection component is connected to the power battery and is used to detect the current temperature of the power battery. A first generation component. The first generation component is respectively connected to the first detection component and the control component, and is used to generate the current heating demand when the current temperature is lower than the preset temperature.

9. The system according to claim 1, wherein It further includes: A second detection component, which is connected to the storage battery and is used to detect the current voltage of the storage battery; A second generation component, which is respectively connected to the second detection component and the control component and is used to generate the current power supply demand when the current voltage is lower than a preset voltage.

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

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