Range extender device of electric vehicle and vehicle

Abstract

The utility model discloses a range extender device of an electric automobile, the range extender device is detachably connected with a patch cord, and the patch cord is connected between a charge-discharge port of a battery pack and a high-voltage load. The range extender device of the electric automobile is of a detachable design, the cruising ability of the electric automobile can be improved after the range extender device is connected with the battery pack, and the range extender device is convenient and flexible to use. The utility model further discloses a vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles. Specifically, the utility model relates to an electric vehicle range extender device and a vehicle. Background Technique

[0002] Regarding the current technical status of new energy vehicles, pure electric vehicles are restricted by the practical problems of insufficient long-distance endurance and shortage of infrastructure such as charging piles. Consumers have a natural range anxiety about pure electric vehicles. In a low-temperature environment in winter, the heating of the battery of traditional pure electric vehicles and the heating of the passenger compartment both rely on PTC (electric heaters) for heating, which is not conducive to energy conservation and will affect the endurance of electric vehicles.

[0003] In existing range-extended electric vehicles, as an integral system of the whole vehicle, the range extender has an accessory system the same as that of traditional fuel vehicles. The range extender system is non-detachable and cannot be modified. It not only has a high cost, but also increases the weight of the whole vehicle. The vehicle control strategy is complex and there are many verification items. Range-extended electric vehicles mostly use four-cylinder engines, which occupy a large space, generate high working noise, and have high maintenance costs.

[0004] Chinese Patent with Application No. 202210565717.5 discloses a device for an electric vehicle range extender, including a box body. A placement plate is arranged in the vertical direction of the space part of the box body. An extender body is arranged above the placement plate. Two side plates are arranged above the placement plate and the extender body is located between the two side plates. Heat dissipation parts are arranged on one side of the two side plates close to the extender body. A connecting plate is arranged between the two heat dissipation parts. A cooling component is arranged below the connecting plate. Through the arranged heat dissipation parts, the heat dissipation parts are used to reduce the temperature of the range extender, and the cooling component is used for secondary cooling, thereby achieving further protection of the range extender. Moreover, the placement plate with a damping effect avoids the damage of the range extender caused by vibration during the subsequent vehicle driving, thereby further extending the service life of the range extender.

[0005] It is hoped to provide an improved electric vehicle range extender device, especially regarding improving the endurance of electric vehicles. Content of the Utility Model

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides an electric vehicle range extender device, and the purpose is to improve the endurance of electric vehicles.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is: for an electric vehicle range extender device, the range extender device is detachably connected to a patch cord, and the patch cord is connected between the charge and discharge port of the battery pack and the high-voltage load.

[0008] The high-voltage load is a distribution box, and a plug interface for plugging and connecting with the range extender device is arranged on the distribution box.

[0009] The range extender device is connected to a first quick-connect waterway joint, and the first quick-connect waterway joint is detachably connected to the thermal management system of the electric vehicle.

[0010] The thermal management system includes a heat exchanger, an electric heater, a first water pump, a second water pump, and a three-way valve. The first water pump is connected to a second quick-connect waterway joint, the electric heater is connected to the first water pump and the three-way valve, the three-way valve is connected to the heat exchanger, and the second water pump is connected to the heat exchanger and the battery pack.

[0011] After the first quick-connect waterway joint is connected to the heat exchanger, the second quick-connect waterway joint is connected to the range extender device.

[0012] The present utility model also provides a vehicle, including the electric vehicle range extender device described above.

[0013] The electric vehicle range extender device of the present utility model has a detachable design. After being connected to the battery pack, it can improve the endurance of the electric vehicle and is convenient and flexible to use. Description of the Drawings

[0014] This specification includes the following drawings, and the shown contents are respectively:

[0015] Figure 1 It is a connection schematic diagram of the electric vehicle range extender device of the present utility model;

[0016] Figure 2 It is a schematic diagram of the state where the range extender device is not connected to the thermal management system;

[0017] Figure 3 It is a schematic diagram of the state where the range extender device is connected to the thermal management system;

[0018] The marks in the figure are: 1. Electric vehicle range extender; 2. Battery pack; 3. High-voltage load; 4. Patch cord; 5. Heat exchanger; 6. Electric heater; 7. First water pump; 8. Second water pump; 9. Three-way valve; 10. Heater core; 11. Evaporator; 12. Range extender device; 13. First quick-connect waterway joint; 14. Second quick-connect waterway joint. Detailed Embodiments

[0019] The following is a further detailed description of the specific embodiments of the present utility model by describing the embodiments with reference to the drawings, aiming to help those skilled in the art have a more complete, accurate, and in-depth understanding of the concept and technical solution of the present utility model and facilitate its implementation.

[0020] It should be noted that in the following embodiments, the "first" and "second" do not represent an absolute distinction in structure and / or function, nor do they represent the order of execution. They are only for the convenience of description.

[0021] As Figure 1 shown, the present utility model provides an electric vehicle range extender device. The range extender device is detachably connected to a patch cord, and the patch cord is connected between the charge and discharge port of the battery pack and the high-voltage load.

[0022] Specifically, the high-voltage load is a distribution box, and a plug interface for plugging and connecting with the range extender device is provided on the distribution box.

[0023] In the present utility model, the range extender device includes a generating set. The generating set includes a generator and an engine. The engine is a small gasoline engine or a diesel engine. The engine is used to drive the generator to operate, and the generator generates electricity. The overall volume of the range extender device is relatively small, and the space occupied by its layout on the electric vehicle is not large. The range extender device can be installed between the charge and discharge bus of the battery pack and the load. Correspondingly, a set of range extender charging patch cord is made. The original vehicle high-voltage connector is disconnected, the original vehicle wiring harness is replaced, and the patch cord is plugged between the charge and discharge port of the battery pack and the high-voltage load. Correspondingly, the range extender can also be installed at the plug interface reserved on the distribution box. During daily use of the vehicle, this interface is blocked, and at the same time, a high-voltage harness connecting the range extender is provided, which is connected between the distribution box and the range extender.

[0024] When driving in the urban area on weekdays and traveling short distances, it runs purely on electricity. At this time, the whole vehicle is no different from a traditional pure electric vehicle. It is only used when it is inconvenient to charge during long-distance driving and there is a need for supplementary power. When the range extender device is used on the whole vehicle, it is an extended-range electric vehicle. This kind of range extender device has greater expandability and more flexible use, and can effectively reduce the weight of the whole vehicle; as a backup power source, the range extender device is started to charge the battery pack. Within the allowable range of the battery pack's charging capacity, the power generation power can be adjusted according to the user's needs, and the power generation working conditions can be flexibly divided.

[0025] Condition 1, small-power fixed-point power generation and charging in place: When the vehicle is in a parked state, the range extender device is started, and a small-power fixed-point power generation strategy is adopted. The advantage of small-power power generation in place is low noise, small vibration, and good economy; when charging reaches the set SOC threshold of the battery, the power generation stops and the range extender device is turned off; the user starts the range extender device through the reserved switch on the instrument panel.

[0026] Condition 2, power generation during driving: When the vehicle is driving and the SOC is lower than a certain value, the range extender device can be manually started through the instrument switch (reserved). The range extender device intervenes in the work. According to the current vehicle speed, the power generation power can be adjusted and selected through the reserved switch on the instrument panel. The reserved switch is set before the vehicle leaves the factory.

[0027] Operating condition 3, idling power generation and heating: In a low-temperature environment in winter, the discharge capacity of the battery pack is limited. To save power, improve efficiency, and reduce the use of PTC, in order to quickly bring the battery temperature to the normal operating range, the hot water of the engine is used to heat the battery. Before use, the hot water of this range extender is introduced into the PTC heating water circulation circuit through the transfer water pipe. At this time, the PTC does not work. After the engine hot water is introduced, the circulation water path of the range extender and the PTC circulation water path are connected, and the water circulation transfers the heat to the battery pack through the heat exchanger 5, thereby realizing the rapid heating of the battery pack to the normal operating temperature; in this mode, the range extender runs at idle speed, does not generate electricity externally, and only heats the circulating water. The user starts the range extender through the reserved switch on the instrument panel.

[0028] Operating condition 4, occupant heating: After installing this range extender, connect the water path adapter of the range extender and the water path adapter of the PTC at the same time. In a low-temperature environment in winter, while charging the vehicle, introduce the engine circulating water of the range extender into the PTC circulation water path, which can effectively utilize the heat of the engine. When there is a heating requirement in the passenger compartment, the blower blows the heat into the passenger compartment, reducing the use of PTC and improving energy efficiency. The user starts the range extender device through the reserved switch on the instrument panel.

[0029] When the range extender device is installed in a low-temperature environment, it can be used as a heat source. While charging the battery pack, introduce the heat of the engine into the battery pack and the passenger compartment for use, replacing PTC heating, with higher energy efficiency. Due to its small size, the temperature rise response is also faster. As Figure 2 and Figure 3 shown, the range extender device is connected to the first quick-connect water path joint 13, and the first quick-connect water path joint 13 is detachably connected to the thermal management system of the electric vehicle. The thermal management system includes a heat exchanger 5, an electric heater 6, a first water pump 7, a second water pump 8, and a three-way valve 9. The first water pump 7 is connected to the second quick-connect water path joint 14, the electric heater 6 is connected to the first water pump 7 and the three-way valve 9, the three-way valve 9 is connected to the heat exchanger 5, and the second water pump 8 is connected to the heat exchanger 5 and the battery pack.

[0030] As Figure 2 shown, in the state of not introducing the hot water of the range extender: the water circulation circuit of the range extender and the PTC water circulation circuit are independent of each other, and quick-connect water path joints are provided on both circuits.

[0031] As Figure 3 shown, in the state of introducing the hot water of the range extender: After disconnecting and cross-inserting the quick-connect joints on the two circuits, connect the water circulation circuit of the range extender and the PTC water circulation circuit to each other, introduce the heat of the range extender circulation water path into the PTC circuit, and transfer the heat to the passenger compartment or the battery pack as needed.

[0032] As Figure 3As shown, after the first quick-connect waterway joint 13 is connected to the heat exchanger 5, the second quick-connect waterway joint 14 is connected to the range extender device. Specifically, one end of the first quick-connect waterway joint 13 is connected to the engine water outlet of the range extender device, the other end of the first quick-connect waterway joint 13 is connected to the water inlet of the heat exchanger 5, the water outlet of the heat exchanger 5 is connected to the first port of the three-way valve 9, the second port of the three-way valve 9 is connected to the water inlet of the electric heater 6, the water outlet of the electric heater 6 is connected to the water inlet of the first water pump 7, the water outlet of the first water pump 7 is connected to one end of the second quick-connect waterway joint 14, and the other end of the second quick-connect waterway joint 14 is connected to the engine water inlet of the range extender device. The third port of the three-way valve 9 is connected to one end of the heater core 10, and the other end of the heater core 10 is connected to the second quick-connect waterway joint 14. One end of the second water pump 8 is connected to the heat exchanger 5, the other end of the second water pump 8 is connected to the water inlet of the battery pack, the water outlet of the water inlet is connected to the heat exchanger 5, and the coolant of the battery pack enters the heat exchanger 5 for heat exchange.

[0033] The present invention also provides a vehicle, including the electric vehicle range extender device with the above structure. The vehicle is an electric vehicle, and this electric vehicle range extender device can be referred to Figures 1 to 3 , which will not be elaborated here. Since the vehicle of the present invention includes the electric vehicle range extender device in the above embodiment, it has all the advantages of the above electric vehicle range extender device.

[0034] The present invention has been described exemplarily in combination with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, all are within the protection scope of the present invention.

Claims

1. Electric vehicle range extender device, characterized in that: The range extender device and the patch cord are detachably connected, and the patch cord is connected between the charging and discharging port of the battery pack and the high-voltage load.

2. The electric vehicle range extender device according to claim 1, wherein: The high-voltage load is a distribution box, and a plug interface for plugging and connecting with the range extender device is arranged on the distribution box.

3. The electric vehicle range extender device according to claim 1, characterized in that: The range extender device is connected to the first quick-connect waterway joint, and the first quick-connect waterway joint and the thermal management system of the electric vehicle are detachably connected.

4. The electric vehicle range extender device according to claim 3, characterized in that: The thermal management system includes a heat exchanger, an electric heater, a first water pump, a second water pump and a three-way valve. The first water pump is connected to the second quick-connect waterway joint, the electric heater is connected to the first water pump and the three-way valve, the three-way valve is connected to the heat exchanger, and the second water pump is connected to the heat exchanger and the battery pack.

5. The electric vehicle range extender device according to claim 4, wherein: After the first quick-connect waterway joint is connected to the heat exchanger, the second quick-connect waterway joint is connected to the range extender device.

6. Vehicle, characterized in that: An electric vehicle range extender device according to any one of claims 1 to 5 is included.

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