Power system and vehicle

Abstract

The utility model discloses a power system and a vehicle. The power system comprises a driving battery module and an energy supplementing battery module. The driving battery module is used for connecting the driving motor and the high-voltage load and supplying power to at least one of the driving motor and the high-voltage load; the energy complementing battery module is connected with the driving battery module and is used for complementing energy for the driving battery module; the energy supplementing battery module is further used for being connected with the driving motor and the high-voltage load and supplying power to at least one of the driving motor and the high-voltage load. In the scheme, the driving battery module and the energy supplementing battery module are controlled to work, so that the power system can meet the high electric quantity requirement and the high power requirement at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system technical field especially relates to a power system and vehicle. BACKGROUND

[0002] In the existing power system, generally, energy type battery is used to control the working of driving motor, that is, the electricity of driving motor generally comes from energy type battery, since the charging and discharging power of energy type battery is lower than that of power type battery with same electricity, under special working condition or extreme performance, energy type battery with larger electricity is needed to meet the demand of high power, so that electric vehicle cannot meet the demand of high electricity and high power. SUMMARY

[0003] The utility model embodiment provides a kind of power system and vehicle, to solve the problem that existing power system cannot meet the demand of high electricity and high power.

[0004] A kind of power system, including driving battery module and energy supplementing battery module;

[0005] The driving battery module is used to connect driving motor and high-voltage load, and at least one of the driving motor and high-voltage load is powered;

[0006] The energy supplementing battery module is connected with the driving battery module, and is used to supplement energy for the driving battery module;

[0007] The energy supplementing battery module is also used to connect driving motor and high-voltage load, and at least one of the driving motor and high-voltage load is powered.

[0008] Preferably, the energy supplementing battery module includes energy supplementing battery, first bidirectional converter, first switching circuit and second switching circuit;

[0009] The first end and the second end of the first bidirectional converter are connected with the two ends of the energy supplementing battery through the first switching circuit;

[0010] The third end and the fourth end of the first bidirectional converter are connected with the two ends of the driving battery module, the two ends of the driving motor and the two ends of the high-voltage load through the second switching circuit.

[0011] Preferably, the two ends of the energy supplementing battery are also used to connect slow charging interface through on-board charger;

[0012] The third end and the fourth end of the first bidirectional converter are also used to connect fast charging interface.

[0013] Preferably, the driving battery is power type battery, and the energy supplementing battery is energy type battery.

[0014] Preferably, the energy supplementing battery is at least one of a liquid battery, a semi-solid battery and a full-solid battery.

[0015] The energy supplementing battery is at least one of a nickel-cobalt-manganese ternary battery system, a lithium iron phosphate battery system, a lithium manganese iron phosphate battery system, a sodium ion battery system, a manganese-based battery system, a silicon-based battery system and a lithium battery system.

[0016] Preferably, the power system further comprises a low-voltage battery module.

[0017] The low-voltage battery module is connected to the driving battery module and is used to pre-charge the driving battery module.

[0018] The low-voltage battery module is further used to connect a low-voltage load and supply power to the low-voltage load.

[0019] Preferably, the low-voltage battery module comprises a low-voltage battery, a second bidirectional converter and a third switch circuit.

[0020] The first end and the second end of the second bidirectional converter are connected to both ends of the low-voltage battery through the third switch circuit.

[0021] The third end and the fourth end of the second bidirectional converter are respectively connected to both ends of the driving battery module.

[0022] Preferably, the power system further comprises a power module.

[0023] The power module is connected to the energy supplementing battery module and is used to supply power to the energy supplementing battery module; the power module is further used to connect a driving motor and a high-voltage load and supply power to at least one of the driving motor and the high-voltage load.

[0024] Preferably, the power module comprises a range-extending power module; the power module comprises an engine and a generator connected to the engine.

[0025] The generator is connected to the energy supplementing battery module and is further used to connect a driving motor and a high-voltage load.

[0026] Preferably, the power system further comprises a battery management module; the battery management module is connected to the battery modules in the power system and is used to control the operation of the battery modules.

[0027] A vehicle comprising a vehicle body structure and the above power system.

[0028] The vehicle body structure is provided with a first mounting area and a second mounting area spaced apart in the front-rear direction of the vehicle; the energy supplementing battery module is arranged in the first mounting area and the driving battery module is arranged in the second mounting area.

[0029] The length of the first mounting area along the vehicle front-rear direction is greater than the length of the second mounting area along the vehicle front-rear direction.

[0030] Preferably, the length of the first mounting area along the vehicle front-rear direction is 800mm-1500mm, and the length of the second mounting area along the vehicle front-rear direction is 300mm-500mm.

[0031] Preferably, the first mounting area is a chassis-under area.

[0032] The second mounting area is any one of a chassis-under area, a seat-under area and a trunk area.

[0033] Preferably, the vehicle further comprises a first connecting device and a second connecting device, both of which are flexible connecting devices.

[0034] The first end of the first connecting device is connected with the driving battery module, and the second end of the first connecting device is connected with the driving motor and the high-voltage load.

[0035] The first end of the second connecting device is connected with the energy-supplementing battery module, and the second end of the second connecting device is connected with the driving battery module and the first end of the first connecting device.

[0036] The embodiments of the utility model provide power system and vehicle, driving battery module and energy-supplementing battery module are all used for connecting driving motor and high-voltage load, can make driving battery module power supply driving motor when the demand power of whole vehicle is small;Driving battery module and energy-supplementing battery module can jointly power supply driving motor when the demand power of whole vehicle is large, to make power system can satisfy high power demand;Energy-supplementing battery module is connected with driving battery module, can supplement energy to driving battery module when the electric quantity of driving battery module is insufficient, to make power system can satisfy high electric quantity demand.In the example, by controlling driving battery module and energy-supplementing battery module work, power system can satisfy high electric quantity demand and high power demand simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the description of the embodiments of the utility model, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without paying the creative labor.

[0038] Figure 1 It is a schematic view of the power system of the pure electric architecture in one embodiment of the utility model;

[0039] Figure 2 is a schematic diagram of a power system of a hybrid architecture in an embodiment of the present application;

[0040] Figure 3 is another schematic diagram of a power system of a hybrid architecture in an embodiment of the present application;

[0041] Figure 4 is a flow chart of a control method of a power system in an embodiment of the present application;

[0042] Figure 5 is another flow chart of a control method of a power system in an embodiment of the present application;

[0043] Figure 6 is a schematic diagram of a control strategy in a power system in an embodiment of the present application;

[0044] Figure 7 is an example diagram of a vehicle in an embodiment of the present application.

[0045] Wherein, 10, power system; 1, drive battery module; 11, drive battery; 12, fourth switch circuit; 2, energy supplement battery module; 21, energy supplement battery; 22, first bidirectional converter; 23, first switch circuit; 24, second switch circuit; 3, power module; 31, engine; 32, generator; 4, low-voltage battery module; 41, low-voltage battery; 42, second bidirectional converter; 43, third switch circuit; 20, battery management module; 30, drive motor; 40, high-voltage load; 50, low-voltage load; 61, first connecting device; 62, second connecting device; 63, third connecting device. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0047] It should be understood that the present application can be implemented in different forms and should not be interpreted as being limited to the embodiments presented herein. On the contrary, these embodiments are provided to make the disclosure complete and complete and to fully convey the scope of the present application to those skilled in the art. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity throughout the same reference numerals represent the same elements.

[0048] The embodiment of the present application provides a power system 10, such asFigures 1-3 As shown, the power system 10 includes a driving battery module 1 and a compensating battery module 2; the driving battery module 1 is connected to the driving motor 30 and the high-voltage load 40, and supplies power to at least one of the driving motor 30 and the high-voltage load 40; the compensating battery module 2 is connected to the driving battery module 1, and supplies power to the driving battery module 1; the compensating battery module 2 is also connected to the driving motor 30 and the high-voltage load 40, and supplies power to at least one of the driving motor 30 and the high-voltage load 40.

[0049] The driving battery module 1 is mainly responsible for the electric driving of the vehicle, and includes the driving battery 11 and other elements connected to the driving battery 11. The driving battery 11 is connected to the driving motor 30, and supplies power to at least one of the driving motor 30 and the high-voltage load 40, so as to make at least one of the driving motor 30 and the high-voltage load 40 work. In this example, the high-voltage load 40 refers to a load other than the driving motor 30, and has a higher working voltage, such as a heater PTC and an air conditioner compressor ECP.

[0050] The compensating battery module 2 is mainly responsible for the electric energy storage of the vehicle, and includes the compensating battery 21 and other elements connected to the compensating battery 21. The compensating battery 21 is connected to the driving battery 11, and supplies power to the compensating battery 21, so as to compensate the driving battery 11; the compensating battery 21 is also connected to the driving motor 30, and supplies power to at least one of the driving motor 30 and the high-voltage load 40, so as to make at least one of the driving motor 30 and the high-voltage load 40 work.

[0051] As an example, the driving battery module 1 and the compensating battery module 2 are both connected to the driving motor 30 and the high-voltage load 40, and when the demand power P0 of the vehicle is small, the driving battery module 1 supplies power to at least one of the driving motor 30 and the high-voltage load 40; when the demand power P0 of the vehicle is large, the driving battery module 1 and the compensating battery module 2 jointly supply power to at least one of the driving motor 30 and the high-voltage load 40, so as to make the power system 10 meet the high-power demand; the compensating battery module 2 is connected to the driving battery module 1, and can compensate the driving battery module 1 when the power of the driving battery module 1 is insufficient, so as to make the power system 10 meet the high-power demand. In this example, by controlling the driving battery module 1 and the compensating battery module 2 to work, the power system 10 can meet the high-power demand and the high-power demand at the same time.

[0052] In an embodiment, as shown in FIG. 1, the power system 10 includes a driving battery module 1 and a compensating battery module 2; the driving battery module 1 is connected to the driving motor 30 and the high-voltage load 40, and supplies power to at least one of the driving motor 30 and the high-voltage load 40; the compensating battery module 2 is connected to the driving battery module 1, and supplies power to the driving battery module 1; the compensating battery module 2 is also connected to the driving motor 30 and the high-voltage load 40, and supplies power to at least one of the driving motor 30 and the high-voltage load 40. Figures 1-3As shown, the energy-supplementing battery module 2 comprises an energy-supplementing battery 21, a first bidirectional converter 22, a first switch circuit 23 and a second switch circuit 24; the first end and the second end of the first bidirectional converter 22 are connected to the two ends of the energy-supplementing battery 21 through the first switch circuit 23; the third end and the fourth end of the first bidirectional converter 22 are connected to the two ends of the driving battery module 1, the two ends of the driving motor 30 and the two ends of the high-voltage load 40 through the second switch circuit 24.

[0053] The first bidirectional converter 22 is a bidirectional converter arranged in the energy-supplementing battery module 2, and the bidirectional converter is a device for realizing bidirectional flow of electric energy and voltage conversion.

[0054] As an example, the first end and the second end of the first bidirectional converter 22 are connected to the two ends of the energy-supplementing battery 21 through the first switch circuit 23, respectively; the third end and the fourth end of the first bidirectional converter 22 are connected to the two ends of the driving battery module 1, the two ends of the driving motor 30 and the two ends of the high-voltage load 40 through the second switch circuit 24, respectively. In this example, since the first bidirectional converter 22 connects the energy-supplementing battery 21 and the driving battery module 1, the first bidirectional converter 22 can convert the output voltage of the energy-supplementing battery 21 into the battery voltage of the driving battery 11 in the driving battery module 1, so that the energy-supplementing battery 21 can supplement the energy of the driving battery 11. The first bidirectional converter 22 also connects the energy-supplementing battery 21 and the two ends of the driving motor 30 and the two ends of the high-voltage load 40, and the first bidirectional converter 22 can convert the output voltage of the energy-supplementing battery 21 into the working voltage corresponding to the working of at least one of the driving motor 30 and the high-voltage load 40, so that the energy-supplementing battery 21 can supply power to at least one of the driving motor 30 and the high-voltage load 40. In this example, through one first bidirectional converter 22, voltage conversion between the energy-supplementing battery 21 and the driving battery module 1, the driving motor 30 and the high-voltage load 40 is realized, so that the energy-supplementing battery 21 can realize the functions of supplementing the energy of the driving battery 11, supplying power to at least one of the driving motor 30 and the high-voltage load 40, etc., to solve the problem that the energy-supplementing battery 21 cannot work normally due to the voltage difference between the energy-supplementing battery 21 and the driving battery 11, the driving motor 30 and the high-voltage load 40, and only one first bidirectional converter 22 is used for voltage conversion, which has the advantages of lower cost and smaller layout space.

[0055] In an embodiment, as Figures 1-3As shown, the first switch circuit 23 includes a first switch S1 and a second switch S2; the second switch circuit 24 includes a third switch S3; the first end of the first bidirectional converter 22 is connected with the positive pole of the energy supplement battery 21 through the first switch S1; the second end of the first bidirectional converter 22 is connected with the negative pole of the energy supplement battery 21 through the second switch S2; the third end of the first bidirectional converter 22 is connected with the first end of the driving battery module 1, the first end of the driving motor 30 and the first end of the high-voltage load 40 through the third switch S3; the fourth end of the first bidirectional converter 22 is connected with the second end of the driving battery module 1, the second end of the driving motor 30 and the second end of the high-voltage load 40.

[0056] In the example, when the first switch S1, the second switch S2 and the third switch S3 are turned on, the first bidirectional converter 22 can realize voltage conversion between the energy supplement battery 21 and the driving battery 11, the driving motor 30 and the high-voltage load 40, so that the energy supplement battery 21 can realize voltage conversion between the energy supplement battery 21 and any one of the driving battery module 1, the driving motor 30 and the high-voltage load 40, so that the energy supplement battery 21 can realize functions such as energy supplement for the driving battery 11, power supply for at least one of the driving motor 30 and the high-voltage load 40 and charging reception of the high-voltage load 40, to solve the problem that the energy supplement battery 21 cannot work normally due to voltage difference between the energy supplement battery 21 and the driving battery 11, the driving motor 30 and the high-voltage load 40, and only one first bidirectional converter 22 is used for voltage conversion, which has the advantages of lower cost and smaller layout space.

[0057] Further, the energy supplement battery module 2 further includes a first fuse F1, which is arranged between the positive pole of the energy supplement battery 21 and the first end of the first switch S1, for fuse protection of the energy supplement battery module 2, to ensure normal work of the driving battery module 1.

[0058] In an embodiment, the two ends of the energy supplement battery 21 are further used for connecting a slow charging interface through the on-board charger 25; and the third end and the fourth end of the first bidirectional converter 22 are further used for connecting a fast charging interface.

[0059] As an example, the two ends of the energy supplement battery 21 are further used for connecting a slow charging interface through the on-board charger 25, so that the charging pile or other charging equipment can charge the energy supplement battery 21 through the on-board charger when the slow charging interface is connected with the charging pile or other charging equipment. Alternatively, when the fast charging interface is connected with the charging pile or other charging equipment, the first bidirectional converter 22 can perform voltage conversion on the output voltage of the charging pile or other charging equipment to charge the energy supplement battery 21. In the example, the first bidirectional converter 22 in the energy supplement battery module 2 is multiplexed to avoid the problem that the energy supplement battery 21 cannot be normally charged due to voltage difference between the energy supplement battery 21 and the charging pile.

[0060] Further, the energy-supplementing battery module 2 further comprises a fourth switch S4, which is arranged between the third end of the second bidirectional converter 4222 and the fast-charging interface. When the fast-charging interface is connected to a charging pile or other charging device, the fourth switch S4 can be controlled to be turned on, and the charging pile or other charging device can charge the energy-supplementing battery 21 through the second bidirectional converter 4222.

[0061] In an embodiment, the energy-supplementing battery module 2 further comprises a pre-charging circuit, which is arranged in parallel with the first switch S1, and the pre-charging circuit comprises a pre-charging resistor R0 and a pre-charging switch S0 arranged in series.

[0062] As an example, the energy-supplementing battery module 2 further comprises a pre-charging circuit, which is arranged in parallel with the first switch S1, i.e., the first end of the pre-charging circuit is connected to the positive electrode of the energy-supplementing battery 21, and the second end of the pre-charging circuit is connected to the charging interface (which can be a slow-charging interface or a fast-charging interface), and the pre-charging circuit comprises a pre-charging resistor R0 and a pre-charging switch S0 arranged in series. When the electric vehicle is connected to a charging pile, the first switch S1 can be controlled to be turned off, and the pre-charging switch S0 and the second switch S2 can be controlled to be turned on, so that the charging pile connected to the charging interface can pre-charge the energy-supplementing battery 21 to ensure charging safety. After pre-charging is completed, the pre-charging switch S0 can be controlled to be turned off, and the first switch S1 and the second switch S2 can be controlled to be turned on, so that the charging pile connected to the charging interface can charge the energy-supplementing battery 21 to ensure charging efficiency.

[0063] In an embodiment, the driving battery module 1 comprises a driving battery 11, and the two ends of the driving battery 11 are connected to the driving motor 30 and the energy-supplementing battery module 2 through a fourth switch circuit. In this example, the fourth switch circuit 11 comprises a fifth switch S5 and a sixth switch S6; the positive electrode of the driving battery 11 is connected to the first end of the fifth switch S5; the negative electrode of the driving battery 11 is connected to the first end of the sixth switch S6; and the second end of the fifth switch S5 and the second end of the sixth switch S6 are used to connect the two ends of the driving motor 30 and the two ends of the energy-supplementing battery module 2.

[0064] As an example, the driving battery module 1 comprises not only the driving battery 11, but also the fifth switch S5 and the sixth switch S6; the first end of the fifth switch S5 is connected to the positive pole of the driving battery 11, and the first end of the sixth switch S6 is connected to the negative pole of the driving battery 11; the second end of the fifth switch S5 and the second end of the sixth switch S6 can be connected to both ends of the driving motor 30, so that the driving battery 11 can supply power to at least one of the driving motor 30 and the high-voltage load 40; or can be connected to the energy supplement battery 21 through other elements or batteries, so that the driving battery 11 can receive the energy output by the energy supplement battery 21. In this example, when the fifth switch S5 and the sixth switch S6 are turned on, the driving battery 11 can supply power to at least one of the driving motor 30 and the high-voltage load 40, and can also receive the energy output by the energy supplement battery 21; when the fifth switch S5 and the sixth switch S6 are turned off, the driving battery 11 cannot supply power to the driving motor 30, and cannot receive the energy output by the energy supplement battery 21. In this example, the second end of the fifth switch S5 and the second end of the sixth switch S6 are the first end and the second end of the driving battery module 1.

[0065] Further, the driving battery module 1 further comprises a second fuse F2, which is arranged between the positive pole of the driving battery 11 and the first end of the fifth switch S5, for fusing protection of the driving battery module 1, so as to ensure the normal work of the driving battery module 1.

[0066] In an embodiment, the driving battery 11 is a power-type battery, and the energy supplement battery 21 is an energy-type battery.

[0067] As an example, the driving battery 11 is a power battery, which can meet the acceleration and deceleration requirements and heavy load starting requirements under most working conditions. The energy supplement battery 21 is an energy battery, which can store a large amount of energy for the vehicle to ensure the vehicle's endurance. In this example, the energy supplement battery 21 is at least one of a liquid battery, a semi-solid battery and a full-solid battery, that is, the energy supplement battery 21 can be a battery of one type or a combination of batteries of two or more types. In addition, the energy supplement battery 21 is at least one of a nickel-cobalt-manganese ternary battery system, a lithium iron phosphate battery system, a manganese lithium iron phosphate battery system, a sodium ion battery system, a manganese-based battery system, a silicon-based battery system and a lithium battery system, that is, the energy supplement battery 21 can be a battery of one system or a combination of batteries of two or more systems. In addition, the energy supplement battery 21 can be a traditional or new electrochemical energy storage device. In this example, the energy supplement battery 21 supplements the driving battery 11, which can improve the expandability of the power system 10 and avoid the problem of reducing the life cycle of the vehicle architecture caused by the iteration of battery technology. In addition, the energy supplement battery 21 has a modularized battery cell, which can realize customizable development of the battery capacity and better realize the platformization of the vehicle architecture, reduce the development cost caused by different vehicle capacities, and improve the market competitiveness of the product.

[0068] In this example, the power battery is used as the driving battery 11 to supply power to at least one of the driving motor 30 and the high-voltage load 40, which can meet the acceleration and deceleration requirements and heavy load starting requirements under most working conditions. The energy supplement battery 21 is used as an energy supplement battery, which supplements the driving battery 11 to ensure the endurance of the vehicle. The driving battery 11 and the energy supplement battery 21 are used to connect the driving motor 30 and the high-voltage load 40. The driving battery 11 can supply power to at least one of the driving motor 30 and the high-voltage load 40 according to actual requirements. The driving battery 11 and the energy supplement battery 21 can supply power to at least one of the driving motor 30 and the high-voltage load 40 together, and the energy supplement battery 21 supplements the driving battery 11 to enable the power system 10 to meet the high-capacity requirement and the high-power requirement at the same time.

[0069] In an embodiment, as shown in FIG. 1, Figures 1-3 The power system 10 further includes a low-voltage battery module 4. The low-voltage battery module 4 is connected to the driving battery module 1 to pre-charge the driving battery module 1. The low-voltage battery module 4 is also used to connect a low-voltage load 50 to supply power to the low-voltage load 50.

[0070] The low-voltage battery module 4 is a module for providing a low output voltage. As an example, the low-voltage battery module 4 includes a low-voltage battery 41 and other elements connected to the low-voltage battery 41. The low-voltage battery 41 can generally provide an output voltage of 12V or 24V.

[0071] As an example, the power system 10 further comprises a low-voltage battery module 4 connected with the drive battery module 1, for pre-charging the drive battery 11 through the low-voltage battery module 4 before charging the drive battery module 1, and charging the drive battery 11 after the pre-charging is completed, to ensure the charging safety of the drive battery 11. In the example, the charging process of the drive battery 11 can be directly charged by the charging pile, or the charging pile charges the energy supplement battery 21, and then the energy supplement battery 21 charges the drive battery 11. In the example, the low-voltage battery module 4 is also used to connect the low-voltage load 50 to supply power to the low-voltage load 50, so that the low-voltage load 50 can work normally. In the example, the low-voltage load 50 refers to a load with a lower working voltage, for example, a load such as a car light, an electric seat, an electric window, and a central control entertainment screen with a working voltage of 12V or 24V.

[0072] In an embodiment, as shown in Figures 1-3 The low-voltage battery module 4 comprises a low-voltage battery 41, a second bidirectional converter 42, and a third switch circuit 43; the first end and the second end of the second bidirectional converter 42 are connected with the two ends of the low-voltage battery 41 through the third switch circuit 43; the third end and the fourth end of the second bidirectional converter 42 are respectively connected with the two ends of the drive battery module 1.

[0073] The second bidirectional converter 42 is a bidirectional converter arranged in the low-voltage battery module 4, and the bidirectional converter is a device for realizing bidirectional flow of electric energy and voltage conversion.

[0074] As an example, the low-voltage battery module 4 comprises a low-voltage battery module 4, a second bidirectional converter 42, and a third switch circuit 43; the first end and the second end of the second bidirectional converter 42 are connected with the two ends of the low-voltage battery 41 through the third switch circuit 43, and the third switch circuit 43 can comprise a fourth switch S4. Specifically, the first end of the second bidirectional converter 42 is connected with the positive electrode of the low-voltage battery 41 through the fourth switch S4, and the second end of the second bidirectional converter 42 is connected with the negative electrode of the low-voltage battery 41; the third end and the fourth end of the second bidirectional converter 42 are respectively connected with the two ends of the drive battery module 1, and when the seventh switch S7 is turned on, the drive battery 11 in the drive battery module 1 can be charged through the low-voltage battery 41 to realize pre-charging of the drive battery 11, so as to ensure the charging safety of the drive battery 11. Moreover, the two ends of the low-voltage battery 41 are also connected with the low-voltage load 50 through the seventh switch S7, so that the low-voltage battery 41 can supply power to the low-voltage load 50 to ensure the normal work of the low-voltage load 50.

[0075] In an embodiment, as shown in Figures 1-3As shown, the power system 10 further comprises a power module 3; the power module 3 is connected with the energy supplement battery module 2, and is used for supplying power to the energy supplement battery module 2; the power module 3 is further used for connecting the driving motor 30 and the high-voltage load 40, and supplying power to at least one of the driving motor 30 and the high-voltage load 40.

[0076] As shown, the power system 10 further comprises a power module 3; the power module 3 is connected with the energy supplement battery module 2, and is used for supplying power to the energy supplement battery module 2; the power module 3 is further used for connecting the driving motor 30 and the high-voltage load 40, and supplying power to at least one of the driving motor 30 and the high-voltage load 40.

[0077] As shown, the power system 10 further comprises a power module 3; the power module 3 is connected with the energy supplement battery module 2, and is used for supplying power to the energy supplement battery module 2; the power module 3 is further used for connecting the driving motor 30 and the high-voltage load 40, and supplying power to at least one of the driving motor 30 and the high-voltage load 40.

[0078] As shown, the power system 10 further comprises a power module 3; the power module 3 is connected with the energy supplement battery module 2, and is used for supplying power to the energy supplement battery module 2; the power module 3 is further used for connecting the driving motor 30 and the high-voltage load 40, and supplying power to at least one of the driving motor 30 and the high-voltage load 40.

[0079] The embodiment of the utility model further provides a control method of power system 10, be applicable in the power system 10 of above-mentioned embodiment, such as Figure 4 As shown, the control method can be applied to a control device connected with the power system 10, and specifically includes the following steps performed by the control device:

[0080] S11: obtaining measured data, the measured data including a whole vehicle demand power P0, an output power Px and a current power SOCx of the driving battery module 1, an output power Py and a current power SOCy of the energy supplement battery module 2;

[0081] S12: when the measured data meets an evaluation condition corresponding to the target pure electric mode, controlling the driving battery module 1 and the energy supplement battery module 2 to work and supply power to at least one of the driving motor 30 and the high-voltage load 40, so that the power system 10 enters the target pure electric mode.

[0082] The measured data is real-time detected and collected data. The whole vehicle demand power refers to the power required by the automobile under different working conditions. In this example, the whole vehicle demand power can be the sum of the demand power of the whole vehicle demand power P0 and the high-voltage load 40, which can be represented by P0. The output power of the driving battery module 1 refers to the output power Px of the driving battery module 1 in the driving battery module 1, which can be represented by Px. The output power of the energy supplement battery module 2 refers to the output power of the energy supplement battery 21 in the energy supplement battery module 2, which can be represented by Py. The output power here refers to the power that the battery can provide in the discharging process, which is the maximum power that it can provide. The current power of the driving battery module 1 refers to the current power of the driving battery 11 in the driving battery module 1 detected at the current time, which can be represented by SOCx. The current power of the energy supplement battery module 2 refers to the current power of the energy supplement battery 21 in the energy supplement battery module 2 detected at the current time, which can be represented by SOCy.

[0083] The target pure electric mode refers to the pure electric mode that needs to be entered at the next time. The evaluation condition of the target pure electric mode is a condition pre-set for evaluating whether the target pure electric mode can be entered.

[0084] As an example, the control device is connected with the driving battery module 1 and the energy supplement battery module 2, and can acquire the measured data such as the vehicle demand power P0, the output power Px and the current SOCx of the driving battery module 1, the output power Py and the current SOCy of the energy supplement battery module 2, through the CAN bus or other ways. According to the size of the vehicle demand power P0, the output power Px of the driving battery module 1 and the output power Py of the energy supplement battery module 2, and by comparing the current SOCx of the driving battery module 1 with the current SOCy of the energy supplement battery module 2, it is evaluated whether the measured data meets the evaluation conditions corresponding to the plurality of preset pure electric modes set by the system. When the measured data meets the evaluation condition corresponding to any preset pure electric mode, the preset pure electric mode is determined as the target pure electric mode to be entered at the next moment. At this time, the driving battery module 1 and the energy supplement battery module 2 need to be controlled to work, so as to supply power to at least one of the driving motor 30 and the high-voltage load 40, so that the power system 10 enters the target pure electric mode. At this time, the control device controls the driving battery module 1 and the energy supplement battery module 2 to work, and does not control the power module 3 to work, so as to ensure that the power system 10 meets the high power demand and the high power demand.

[0085] In an embodiment, referring to Figure 6 , the step S12, that is, when the measured data meets the evaluation condition corresponding to the target pure electric mode, the driving battery module 1 and the energy supplement battery module 2 are controlled to work, so as to supply power to at least one of the driving motor 30 and the high-voltage load 40, so that the power system 10 enters the target pure electric mode, including:

[0086] S121: When the vehicle demand power P0 is less than or equal to the output power Px of the driving battery module 1, and the current SOCx of the driving battery module 1 is greater than the first SOC threshold SOC1, the driving battery module 1 is controlled to supply power to at least one of the driving motor 30 and the high-voltage load 40, so that the power system 10 enters the first pure electric mode;

[0087] S122: When the vehicle demand power P0 is less than or equal to the output power Px of the driving battery module 1, the current SOCx of the driving battery module 1 is less than or equal to the first SOC threshold SOC1, and the current SOCy of the energy supplement battery module 2 is greater than the second SOC threshold SOC2, the driving battery module 1 is controlled to supply power to at least one of the driving motor 30 and the high-voltage load 40, and the energy supplement battery module 2 is controlled to supplement energy to the driving battery module 1, so that the power system 10 enters the second pure electric mode;

[0088] S123: when the whole vehicle demand power P0 is greater than the output power Px of the driving battery module 1, the whole vehicle demand power P0 is less than or equal to the sum of the output power Px of the driving battery module 1 and the output power Py of the supplement battery module 2, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, and the current electric quantity SOCy of the supplement battery module 2 is greater than the second electric quantity threshold SOC2, the control device controls the driving battery module 1 and the supplement battery module 2 to supply power to at least one of the driving motor 30 and the high-voltage load 40, and controls the supplement battery module 2 to supply power to the driving battery module 1, so that the power system 10 enters the third pure electric mode.

[0089] The first pure electric mode is a mode in which the driving battery 11 supplies power to at least one of the driving motor 30 and the high-voltage load 40, and the supplement battery 21 does not work. The first electric quantity threshold is a threshold value for evaluating whether the current electric quantity of the driving battery module 1 reaches a larger standard, which can be represented by SOC1. The second electric quantity threshold is a threshold value for evaluating whether the current electric quantity of the supplement battery module 2 reaches a larger standard, which can be represented by SOC2.

[0090] As an example, the control device is connected to the driving battery module 1 and the supplement battery module 2. When the whole vehicle demand power P0 is less than the output power Px of the driving battery module 1, and the current electric quantity SOCx of the driving battery module 1 is greater than the first electric quantity threshold SOC1, that is, when P0≤Px and SOCx>SOC1, it is determined that the driving battery 11 can provide power to meet the normal work of at least one of the driving motor 30 and the high-voltage load 40, and the driving battery 11 has sufficient electric quantity. At this time, it is determined that the measured data meets the evaluation condition corresponding to the first pure electric mode, the driving battery module 1 is controlled to work, so that the driving battery 11 in the driving battery module 1 supplies power to at least one of the driving motor 30 and the high-voltage load 40. Since the driving motor 30 is a power battery, it can meet the acceleration and deceleration requirements and heavy load starting requirements under most working conditions. Moreover, the supplement battery module 2 does not need to be controlled to work, so as to save the energy consumption of the supplement battery module 2.

[0091] The second pure electric mode is a mode in which the driving battery 11 supplies power to at least one of the driving motor 30 and the high-voltage load 40, and the supplement battery 21 supplies power to the driving battery 11.

[0092] As an example, the control device is connected with the driving battery module 1 and the power supplementing battery module 2. When the whole vehicle demand power P0 is less than the output power Px of the driving battery module 1, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, and the current electric quantity SOCy of the power supplementing battery module 2 is greater than the second electric quantity threshold SOC2, that is, when P0≤Px, SOCx≤SOC1, and SOCy>SOC2, it is determined that the driving battery 11 can provide power to meet the normal work of at least one of the driving motor 30 and the high-voltage load 40, and the driving battery 11 cannot provide sufficient electric quantity, while the power supplementing battery 21 can provide sufficient electric quantity for the driving battery 11. At this time, it is determined that the measured data meets the evaluation condition corresponding to the second pure electric mode, the driving battery module 1 is controlled to work so that the driving battery 11 in the driving battery module 1 supplies power to at least one of the driving motor 30 and the high-voltage load 40. Since the driving motor 30 is a power type battery, it can meet the acceleration and deceleration requirements and heavy load starting requirements under most working conditions. The power supplementing battery module 2 is controlled to work so that the power supplementing battery 21 supplements power to the driving battery 11, thereby guaranteeing the whole vehicle endurance, so that the power system 10 meets the high electric quantity requirement and the high power requirement.

[0093] The third pure electric mode refers to a mode in which the driving battery 11 and the power supplementing battery 21 supply power to at least one of the driving motor 30 and the high-voltage load 40, and the power supplementing battery 21 supplements power to the driving battery 11.

[0094] As an example, the control device is connected with the driving battery module 1 and the energy supplement battery module 2, if the vehicle demand power P0 is greater than the output power Px of the driving battery module 1, the vehicle demand power P0 is less than or equal to the sum of the output power Px of the driving battery module 1 and the output power Py of the energy supplement battery module 2, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, and the current electric quantity SOCy of the energy supplement battery module 2 is greater than the second electric quantity threshold SOC2, that is, Px < P0 ≤ Px + Py, SOCx ≤ SOC1 and SOCy > SOC2, it is determined that the driving battery 11 cannot provide the power meeting the normal work of at least one of the driving motor 30 and the high-voltage load 40, but the driving battery 11 and the energy supplement battery 21 cooperate to be able to provide the power meeting the normal work of at least one of the driving motor 30 and the high-voltage load 40, and the driving battery 11 cannot provide sufficient electric quantity, while the energy supplement battery 21 can provide sufficient electric quantity for the driving battery 11, at this time, it is determined that the measured data meets the evaluation condition corresponding to the third pure electric mode, the driving battery module 1 and the energy supplement battery module 2 are controlled to work to make the driving battery 11 and the energy supplement battery 21 jointly supply power to at least one of the driving motor 30 and the high-voltage load 40 to meet the high-power demand, and the energy supplement battery module 2 is controlled to work to make the energy supplement battery 21 supplement the energy for the driving battery 11, thereby guaranteeing the vehicle endurance, so that the power system 10 meets the high electric quantity demand and the high power demand.

[0095] The embodiment of the utility model further provides a control method of power system 10, be applied in the power system 10 of above-mentioned embodiment, as Figure 5 Shown, the control method comprises:

[0096] S21: obtain measured data, the measured data includes vehicle demand power P0, the output power Px and the current electric quantity SOCx of driving battery module 1, the output power Py and the current electric quantity SOCy of energy supplement battery module 2;

[0097] S22: when the measured data meets the evaluation condition corresponding to the target hybrid mode, control driving battery module 1, energy supplement battery module 2 and power module 3 to work to supply power to at least one of the driving motor 30 and the high-voltage load 40, so that the power system 10 enters the target hybrid mode.

[0098] The target hybrid mode refers to the hybrid mode needed to enter next time. The evaluation condition of the target hybrid mode is a condition for evaluating whether the target hybrid mode can be entered, which is set in advance.

[0099] As an example, the control device is connected with the driving battery module 1, the power compensation battery module 2 and the power module 3, and can acquire the measured data such as the whole vehicle demand power P0, the output power Px and the current electric quantity SOCx of the driving battery module 1, the output power Py and the current electric quantity SOCy of the power compensation battery module 2 and the like through the CAN bus or other manners, and according to the whole vehicle demand power P0, the output power Px of the driving battery module 1 and the output power Py of the power compensation battery module 2, and by comparing the current electric quantity SOCx of the driving battery module 1 and the current electric quantity SOCy of the power compensation battery module 2, whether the above measured data meets the evaluation conditions corresponding to the plurality of preset modes set by the system is evaluated, when the measured data meets the evaluation condition corresponding to any preset mode, the preset mode is determined as the target hybrid mode needed to enter at the next moment, at this moment, the driving battery module 1, the power compensation battery module 2 and the power module 3 need to be controlled to work, so as to supply power to at least one of the driving motor 30 and the high-voltage load 40, so that the power system 10 enters the target hybrid mode, at this moment, the control device not only controls the driving battery module 1 and the power compensation battery module 2 to work, but also controls the power module 3 to work, so as to guarantee that the power system 10 meets the high electric quantity demand and the high power demand.

[0100] In an embodiment, referring to Figure 6 , the step S22, that is, when the measured data meets the evaluation condition corresponding to the target mode, the driving battery module 1, the power compensation battery module 2 and the power module 3 are controlled to work, so as to supply power to at least one of the driving motor 30 and the high-voltage load 40, so that the power system 10 enters the target mode, including:

[0101] S221: when the whole vehicle demand power P0 is less than or equal to the output power Px of the driving battery module 1, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, the current electric quantity SOCy of the power compensation battery module 2 is less than or equal to the second electric quantity threshold SOC2, and the current electric quantity SOCy of the power compensation battery module 2 is less than or equal to the second electric quantity threshold SOC2, the driving battery module 1 is controlled to supply power to at least one of the driving motor 30 and the high-voltage load 40, the power compensation battery module 2 is controlled to compensate power for the driving battery module 1, and the power module 3 is controlled to charge the power compensation battery module 2, so that the power system 10 enters the first hybrid mode;

[0102] S222: when the whole vehicle demand power P0 is greater than the output power Px of the driving battery module 1, the whole vehicle demand power P0 is less than or equal to the output power Px of the driving battery module 1 and the output power Py of the power compensation battery module 2, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, and the current electric quantity SOCy of the power compensation battery module 2 is less than or equal to the second electric quantity threshold SOC2, the driving battery module 1 and the power compensation battery module 2 are controlled to supply power to at least one of the driving motor 30 and the high-voltage load 40, the power compensation battery module 2 is controlled to compensate power for the driving battery module 1, and the power module 3 is controlled to charge the power compensation battery module 2, so that the power system 10 enters the second hybrid mode.

[0103] S223: when the whole vehicle demand power P0 is greater than the output power Px of the driving battery module 1 and the output power Py of the power compensation battery module 2, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, and the current electric quantity SOCy of the power compensation battery module 2 is greater than the second electric quantity threshold SOC2, the driving battery module 1, the power compensation battery module 2 and the power module 3 are controlled to supply power to at least one of the driving motor 30 and the high-voltage load 40, the power compensation battery module 2 is controlled to compensate power for the driving battery module 1, and the power module 3 is controlled to charge the power compensation battery module 2, so that the power system 10 enters the third hybrid mode.

[0104] The first hybrid mode refers to a mode in which the driving battery 11 supplies power to at least one of the driving motor 30 and the high-voltage load 40, the power compensation battery 21 compensates power for the driving battery 11, and the power module 3 charges the power compensation battery 21. The second hybrid mode refers to a mode in which the driving battery 11 and the power compensation battery 21 jointly supply power to at least one of the driving motor 30 and the high-voltage load 40, the power compensation battery 21 compensates power for the driving battery 11, and the power module 3 charges the power compensation battery 21. The third hybrid mode refers to a mode in which the driving battery 11, the power compensation battery 21 and the power module 3 jointly supply power to at least one of the driving motor 30 and the high-voltage load 40, the power compensation battery 21 compensates power for the driving battery 11, and the power module 3 charges the power compensation battery 21.

[0105] As an example, the control device is connected with the driving battery module 1, the power compensation battery module 2 and the power module 3. When the whole vehicle demand power P0 is less than or equal to the output power Px of the driving battery module 1, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, the current electric quantity SOCy of the power compensation battery module 2 is less than or equal to the second electric quantity threshold SOC2, and the current electric quantity SOCy of the power compensation battery module 2 is less than or equal to the second electric quantity threshold SOC2, i.e. P0≤Px, SOCx≤SOC1 & SOCy≤SOC2, it is determined that the driving battery 11 can provide the power to meet the normal work of at least one of the driving motor 30 and the high-voltage load 40, and the driving battery 11 cannot provide sufficient electric quantity, and the power compensation battery 21 cannot provide sufficient electric quantity for the driving battery 11. At this time, it is determined that the measured data meets the evaluation condition corresponding to the first hybrid mode, and the driving battery module 1 can be controlled to work so that the driving battery 11 in the driving battery module 1 supplies power to at least one of the driving motor 30 and the high-voltage load 40. Since the driving motor 30 is a power type battery, it can meet the acceleration and deceleration requirements and heavy load starting requirements under most working conditions. The power compensation battery module 2 also needs to be controlled to work so that the power compensation battery 21 supplies power to the driving battery 11, thereby guaranteeing the whole vehicle endurance, and the power module 3 is controlled to charge the power compensation battery 21, so as to avoid that the electric quantity of the power compensation battery 21 is too low to affect the normal work, so that the power system 10 meets the high electric quantity requirement and the high power requirement.

[0106] As an example, the control device is connected with the driving battery module 1, the power compensation battery module 2 and the power module 3. When the whole vehicle demand power P0 is greater than the output power Px of the driving battery module 1, the whole vehicle demand power P0 is less than or equal to the output power Px of the driving battery module 1 and the output power Py of the power compensation battery module 2, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, and the current electric quantity SOCy of the power compensation battery module 2 is less than or equal to the second electric quantity threshold SOC2, that is, Px < P0 ≤ Px + Py, SOCx ≤ SOC1 and SOCy ≤ SOC2, it is determined that the driving battery 11 cannot provide the power satisfying the normal work of at least one of the driving motor 30 and the high-voltage load 40, but the driving battery 11 and the power compensation battery 21 can provide the power satisfying the normal work of at least one of the driving motor 30 and the high-voltage load 40 in cooperation. At this time, it is determined that the measured data satisfies the evaluation condition corresponding to the second hybrid mode, the driving battery module 1 and the power compensation battery module 2 can be controlled to work and supply power to at least one of the driving motor 30 and the high-voltage load 40 to meet the high-power demand. The power compensation battery module 2 also needs to be controlled to work, so that the power compensation battery 21 compensates the driving battery 11, thereby guaranteeing the cruising range of the whole vehicle, and the power module 3 charges the power compensation battery 21 to avoid affecting the normal work of the power compensation battery 21 due to the low electric quantity of the power compensation battery 21, so that the power system 10 meets the high electric quantity demand and the high-power demand.

[0107] As an example, the control device is connected with the driving battery module 1, the power compensation battery module 2 and the power module 3. When the whole vehicle demand power P0 is greater than the output power Px of the driving battery module 1 and the output power Py of the power compensation battery module 2, the current electric quantity SOCx of the driving battery module 1 is less than or equal to the first electric quantity threshold SOC1, and the current electric quantity SOCy of the power compensation battery module 2 is greater than the second electric quantity threshold SOC2, that is, P0 > Px + Py, SOCx ≤ SOC1 and SOCy > SOC2, it is determined that the driving battery 11 and the power compensation battery 21 cannot provide the power satisfying the normal work of at least one of the driving motor 30 and the high-voltage load 40 in cooperation, and the power module 3 also needs to be further controlled to provide additional power. At this time, it is determined that the measured data satisfies the evaluation condition corresponding to the third hybrid mode, the driving battery module 1, the power compensation battery module 2 and the power module 3 can be controlled to work and supply power to at least one of the driving motor 30 and the high-voltage load 40 to meet the high-power demand. The power compensation battery module 2 also needs to be controlled to work, so that the power compensation battery 21 compensates the driving battery 11, thereby guaranteeing the cruising range of the whole vehicle, and the power module 3 charges the power compensation battery 21 to avoid affecting the normal work of the power compensation battery 21 due to the low electric quantity of the power compensation battery 21, so that the power system 10 meets the high electric quantity demand and the high-power demand.

[0108] In one embodiment, a control device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the control method of the power system 10 described in the above embodiment, for example... Figure 4 As shown in S11-S12, or Figure 5 S21-S22 shown are not described again here to avoid repetition.

[0109] In one embodiment, the control device is a battery management module 20, or a vehicle controller connected to the battery management module 20; the battery management module 20 is connected to the battery module in the power system 10 and is used to control the operation of the battery module.

[0110] The battery management module 20 is primarily responsible for sampling, control, lifespan prediction, and fault detection of the power system 10 itself. As an example, the control system executing the above-described control method for the power system 10 can be the battery management module 20. The battery management module 20 is connected to the battery modules of the power system 10 and controls the operation of the battery modules. Here, the battery modules can be the drive battery module 1, the rechargeable battery module 2, and the low-voltage battery module 4. Alternatively, the control system executing the above-described control method for the power system 10 can be an on-board controller. The on-board controller is connected to the battery modules of the power system 10 via the battery management module 20, and is also connected to the power module 3 to control the operation of the battery modules and the power module 3.

[0111] This utility model embodiment provides a vehicle, such as Figure 7 As shown, the vehicle includes a body structure and the aforementioned power system 10; the body structure is provided with a first mounting area and a second mounting area at intervals along the front-rear direction of the vehicle, the energy replenishment battery module 2 is disposed in the first mounting area, and the drive battery module 1 is disposed in the second mounting area; the length of the first mounting area along the front-rear direction of the vehicle is greater than the length of the second mounting area along the front-rear direction of the vehicle.

[0112] As an example, the vehicle includes a body structure with a first mounting area and a second mounting area spaced apart along the vehicle's longitudinal direction. The first mounting area is for mounting the rechargeable battery module 2, and the second mounting area is for mounting the drive battery module 1. In this example, the rechargeable battery module 2 is located in the first mounting area, and the drive battery module 1 is located in the second mounting area. Since the length of the first mounting area along the vehicle's longitudinal direction is greater than the length of the second mounting area along the vehicle's longitudinal direction, the mounting space for the rechargeable battery module 2 is greater than the mounting space for the drive battery module 1. This not only meets the installation requirements for integrating the first bidirectional converter 22 into the rechargeable battery module 2, but also allows for sufficient space to be reserved in the first mounting area. This allows for further customization or modularization of the number of battery cells to meet different power requirements and achieve scalable applications.

[0113] Further, the low-voltage battery module 4 is connected with the driving battery module 1, and both are installed in the second installation area. For example, the low-voltage battery module 4 and the driving battery module 1 can be stacked in the vehicle up-down direction in the second installation area, or can be spaced apart in the vehicle front-rear direction or the vehicle left-right direction in the second installation area, and can be independently arranged according to actual conditions.

[0114] In an embodiment, the length of the first installation area in the vehicle front-rear direction is 800-1500 mm, and the length of the second installation area in the vehicle front-rear direction is 300-500 mm.

[0115] As an example, in actual application, the length of the first installation area in the vehicle front-rear direction can be 800-1500 mm, and the length of the second installation area in the vehicle front-rear direction can be 300-500 mm, so as to install the energy supplement battery module 2 in the larger first installation area, and install the driving battery module 1 (or the driving battery module 1 and the low-voltage battery module 4) in the smaller second installation area, so as to meet the requirement of the energy supplement battery module 2 needing a larger installation space.

[0116] In an embodiment, the first installation area is a region below the chassis.

[0117] The second installation area is any one of a region below the chassis, a region below the seat, and a trunk region.

[0118] As an example, the first installation area is a region below the chassis, i.e., the energy supplement battery module 2 can be installed in the region below the chassis; and the second installation area is any one of a region below the chassis, a region below the seat, and a trunk region, i.e., the driving battery module 1 (or the driving battery module 1 and the low-voltage battery module 4) can be installed in any one of the region below the chassis, the region below the seat, and the trunk region, so as to maximize the use of space, and so that the entire power system 10 can meet the integration requirement.

[0119] In an embodiment, as shown in Figure 2 The vehicle further includes a first connecting device 51 and a second connecting device 62, both of which are flexible connecting devices; a first end of the first connecting device 51 is connected with the driving battery module 1, and a second end of the first connecting device 51 is connected with the driving motor 30; a first end of the second connecting device 62 is connected with the energy supplement battery module 2, and a second end of the second connecting device 62 is connected with the driving battery module 1 and the first end of the first connecting device 51.

[0120] The first connecting device 51 and the second connecting device 62 are connecting devices for realizing transmission of electric energy,

[0121] As an example, the first end of the first connecting device 51 is connected with both ends of the driving battery module 1, and the second end of the first connecting device 51 is connected with both ends of the driving motor 30, so that the driving battery 11 in the driving battery module 1 can supply power to at least one of the driving motor 30 and the high-voltage load 40 through the first connecting device 51. The first end of the second connecting device 62 is connected with both ends of the energy-supplementing battery 21, and the second end of the second connecting device 62 is connected with both ends of the driving battery module 1 and both ends of the driving motor 30, so that the energy-supplementing battery 21 in the energy-supplementing battery module 2 can supply power to at least one of the driving motor 30 and the high-voltage load 40 through the second connecting device 62 and the first connecting device 51, and can also supply power to the driving battery 11 in the driving battery module 1 through the second connecting device 62. In the example, the first connecting device 51 and the second connecting device 62 are flexible connecting devices, so as to facilitate flexible arrangement of the power system 10 according to the installation space of the battery car, and to avoid the problem of poor mechanical connection between the driving battery module 1 and the driving battery module 1 and the energy-supplementing battery module 2.

[0122] Further, the low-voltage battery 41 in the low-voltage battery module 4 is also connected with the low-voltage load 50 through the third connecting device 63, and the third connecting device 63 is a flexible connecting device, so as to facilitate flexible arrangement of the positions of the low-voltage battery 41 and the low-voltage load 50 according to the installation space of the battery car.

[0123] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A power system, characterized by, The power system comprises a driving battery module and a power supplementing battery module; The driving battery module is connected with a driving motor and a high-voltage load, and supplies power to at least one of the driving motor and the high-voltage load; The power supplementing battery module is connected with the driving battery module, and supplies power to the driving battery module; The power supplementing battery module is also connected with the driving motor and the high-voltage load, and supplies power to at least one of the driving motor and the high-voltage load.

2. The power system of claim 1, wherein, The power supplementing battery module comprises a power supplementing battery, a first bidirectional converter, a first switch circuit and a second switch circuit; The first end and the second end of the first bidirectional converter are connected with two ends of the power supplementing battery through the first switch circuit; The third end and the fourth end of the first bidirectional converter are connected with two ends of the driving battery module, two ends of the driving motor and two ends of the high-voltage load through the second switch circuit.

3. The power system of claim 2, wherein, The two ends of the power supplementing battery are also used for connecting a slow charging interface through a vehicle-mounted charger; The third end and the fourth end of the first bidirectional converter are also used for connecting a fast charging interface.

4. The power system of claim 1, wherein, The driving battery is a power battery, and the power supplementing battery is an energy battery.

5. The power system of claim 4, wherein, The power supplementing battery is at least one of a liquid battery, a semi-solid battery and a full-solid battery; The power supplementing battery is at least one of a nickel-cobalt-manganese ternary battery system, a lithium iron phosphate battery system, a lithium manganese iron phosphate battery system, a sodium ion battery system, a manganese-based battery system, a silicon-based battery system and a lithium battery system.

6. The power system of claim 1, wherein, The power system further comprises a low-voltage battery module; The low-voltage battery module is connected with the driving battery module, and is used for pre-charging the driving battery module; The low-voltage battery module is also used for connecting a low-voltage load and supplying power to the low-voltage load.

7. The power system of claim 6, wherein, The low-voltage battery module comprises a low-voltage battery, a second bidirectional converter and a third switch circuit; The first end and the second end of the second bidirectional converter are connected with two ends of the low-voltage battery through the third switch circuit; The third end and the fourth end of the second bidirectional converter are respectively connected with two ends of the driving battery module.

8. The power system of any one of claims 1-7, wherein, The power system further comprises a power module; The power module is connected with the power supplementing battery module, and is used for supplying power to the power supplementing battery module; the power module is also used for connecting the driving motor and the high-voltage load and supplying power to at least one of the driving motor and the high-voltage load.

9. The power system of claim 8, wherein, The power module comprises an engine and a generator connected with the engine; The generator is connected with the power supplementing battery module, and is also used for connecting the driving motor and the high-voltage load.

10. The power system of any one of claims 1-7, wherein, The power system further comprises a battery management module; The battery management module is connected with the battery modules in the power system, and is used for controlling the battery modules to work.

11. A vehicle characterized by comprising: The power system comprises a vehicle body structure and any one of the power systems in claims 1-10; The vehicle body structure is provided with a first mounting area and a second mounting area along a front-rear direction of the vehicle, the power supplementing battery module is arranged in the first mounting area, and the driving battery module is arranged in the second mounting area; The length of the first mounting area along the front-rear direction of the vehicle is greater than the length of the second mounting area along the front-rear direction of the vehicle.

12. The vehicle of claim 11, wherein, The length of the first mounting area along the vehicle front-rear direction is 800-1500 mm, and the length of the second mounting area along the vehicle front-rear direction is 300-500 mm.

13. The vehicle of claim 11, wherein, The first mounting area is a region below the chassis. The second mounting area is any one of a region below the chassis, a region below the seat, and a trunk region.

14. The vehicle of claim 13, wherein, The vehicle further comprises a first connecting device and a second connecting device, both of which are flexible connecting devices. A first end of the first connecting device is connected to the drive battery module, and a second end of the first connecting device is connected to the drive motor and the high-voltage load. A first end of the second connecting device is connected to the energy-supplementing battery module, and a second end of the second connecting device is connected to the drive battery module and the first end of the first connecting device.

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