CN108860370A - Mobile energy storage device - Google Patents

Abstract

The invention provides a mobile energy storage device, which includes: a trailer device, which can be connected to the tail of an electric vehicle and can be dragged by it; a power supply device, which is arranged on the trailer device and includes a backup power supply module , a control module connected to the backup power module and a conductive component that can connect the control module to the power system of the electric vehicle. When the on-board power module of the electric vehicle loses power and the electric vehicle is not accelerating, the backup power module Under the function of the control module and the whole vehicle controller, it can replace the vehicle power supply module and supply power to the power consumption system of the electric vehicle. The volume and weight of the mobile energy storage device provided by the invention are not affected by the electric vehicle itself, and have the advantages of large design freedom, easy portability, and the ability to meet different driving mileage requirements.

Description

Mobile energy storage device

technical field

The invention relates to the field of battery systems of electric vehicles, in particular to a mobile energy storage device.

Background technique

With the increasingly serious environmental problems and the imminent need to protect the environment, electric vehicles have emerged as the times require, and have attracted more and more attention.

Currently, the cost of the battery system of an electric vehicle accounts for about 40% to 60% of the total cost of a pure electric vehicle. In order to reduce the one-time purchase cost of car buyers, it is necessary to reduce the energy of the battery pack configured when the user purchases the vehicle to reduce costs, such as meeting the needs of daily commuting; when the user occasionally needs to travel long distances, the secondary battery pack can be temporarily rented. However, the auxiliary battery pack usually needs to be installed on the vehicle. Currently, electric vehicles with dual battery packs are generally designed so that the two battery packs can be used independently or directly in parallel. Regardless of the way of use, due to the limited space for installing battery packs in electric vehicles, the energy of the secondary battery pack is generally small, making it difficult to meet the requirements for long-distance driving.

In view of the shortcomings of the existing technology, there is an urgent need for a backup power supply that is easy to carry and can meet different driving range requirements to realize the long-distance driving of electric vehicles.

Contents of the invention

The object of the invention of the present invention is to provide a mobile energy storage device for the defects of the prior art, which is used to solve the lack of a backup power source that is easy to carry and can meet different mileage requirements in the prior art to solve the problem of electric vehicles. The problem of long-distance driving.

The invention provides a mobile energy storage device, comprising:

a trailer device capable of being attached to and towed by the rear of an electric vehicle;

Power supply device, the power supply device is set on the trailer device, and includes a backup power supply module, a control module connected to the backup power supply module, and a conductive component that can connect the control module to the power consumption system of the electric vehicle. When the module is out of power and the electric vehicle is not accelerating, the backup power supply module can replace the on-board power supply module under the action of the control module and the vehicle controller and supply power to the electric system of the electric vehicle.

Optionally, the mobile energy storage device further includes a trailer taillight arranged on the tail of the trailer device and connected in parallel with the taillight of the electric vehicle through a conductive component.

Optionally, the conductive component includes a wire and a wiring component connected to the wire, and the wiring component includes a wiring socket and/or a wiring plug.

Optionally, the trailer device includes a frame, a suspension, wheels and a trailer mechanism arranged on the front of the frame and connected to the rear of the electric vehicle, wherein the wheels are connected to the bottom of the frame through the suspension.

Optionally, the trailer device includes arc-shaped fenders arranged on both sides of the vehicle frame and capable of matching with corresponding wheels.

Optionally, the towing mechanism includes a body connected to the front of the vehicle frame and extending forward, pin holes and material-reducing holes provided on the body at intervals along the direction perpendicular to the axis of the wheel, wherein the material-reducing holes are larger than the pin holes. closer to the frame.

The invention provides a combined control method of an electric vehicle and a mobile energy storage device, the steps of which include:

The condition judging step is to judge whether the current state of the on-board power supply module of the electric vehicle satisfies the switching condition, and the switching condition includes that the on-board power supply module has lost power;

The acceleration judging step is to judge whether the electric vehicle is in the acceleration state if the switching condition is satisfied;

Timely switching step, if the electric vehicle is not in the accelerating state, use the backup power module in the mobile energy storage device to replace the on-board power module and supply power to the electric vehicle's power system.

Optionally, the joint control method of the electric vehicle and the mobile energy storage device further includes a postponing switching step after the acceleration judging step, and the postponing switching step includes: if the electric vehicle is in an accelerating state, forcefully and continuously reducing the power of the on-board power supply module Output power, until the output power of the on-board power supply module is zero, use the backup power supply module of the mobile energy storage device to replace the on-board power supply module and supply power to the power system of the electric vehicle.

Optionally, the joint control method of the electric vehicle and the mobile energy storage device further includes a switching prompting step between the condition judging step and the acceleration judging step, the switching prompting step includes: if the on-board power supply of the electric vehicle has run out of power, turn on The power switching prompt function of the prompter in the electric vehicle, the prompter includes a lamp, an electronic screen or a loudspeaker.

Optionally, the joint control method of the electric vehicle and the mobile energy storage device further includes a successful switching prompting step after the timely switching step and the postponing switching step, the successful switching prompting step includes: turning on the successful switching prompting of the prompter in the electric vehicle function, prompters include lights, electronic screens or speakers.

The mobile energy storage device provided by the present invention, the volume and weight of the backup power supply are not affected by the electric vehicle itself, has the advantages of large design freedom, easy portability, and can meet different driving mileage requirements; the mobile energy storage device and Electric vehicles can be quickly disassembled, and the shape and installation of mobile energy storage equipment are not affected by vehicle type, body form, etc., which is convenient for standardization and generalization; it is a mobile energy storage with low cost, high convenience and high versatility equipment.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the specific embodiments or the prior art. Throughout the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn in actual scale.

Fig. 1 shows a schematic structural diagram of a mobile energy storage device according to an embodiment of the present invention;

Figure 2 shows a perspective view of a mobile energy storage device according to an embodiment of the present invention; and

Fig. 3 shows a joint control method of an electric vehicle and a mobile energy storage device according to an embodiment of the present invention.

Detailed ways

Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.

Fig. 1 and Fig. 2 show a schematic structural diagram of a mobile energy storage device 100 according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 2 , the mobile energy storage device 100 includes: a trailer device 1, which can be connected to the tail of an electric vehicle and can be dragged by it; a power supply device 2, which is arranged on the trailer device 1, and includes a backup power module 21, a control module 22 (not shown) connected to the backup power module 21, and a conductive component 23 that can connect the control module 22 to the power system of the electric vehicle. When the vehicle-mounted power supply module is out of power and the electric vehicle is not accelerating, the backup power supply module 21 can replace the vehicle-mounted power supply module under the action of the control module 22 and the vehicle controller and supply power to the electrical system of the electric vehicle.

In the embodiment of the present invention, the trailer device 1 further includes a vehicle frame 11 , wheels 12 , a suspension 13 , a towing mechanism 14 and a fender 15 . Vehicle frame 11 is the carrier of all other parts on the trailer device 1, that is, all other parts are installed on the vehicle frame; wheel 12 is installed on the bottom of vehicle frame 11 by suspension 13, and suspension 13 can adopt independent suspension, semi- Independent suspension or non-independent suspension, and when suspension selects non-independent suspension for use, this non-independent suspension can select leaf spring or fiber spring for use; Towing mechanism 14 is arranged on the front portion of vehicle frame 11, and towing mechanism 14 includes a body 141 connected to the front of the vehicle frame 11 and extending forward, pin holes 142 and material reduction holes 143 provided on the body 141 at intervals along the axis direction perpendicular to the wheel, wherein the material reduction holes 143 are smaller than the pin holes 142 is closer to the vehicle frame 11, wherein the drag device 1 is connected to the electric vehicle through the pin hole 142, and the connection scheme should meet the corresponding vehicle towing requirements stipulated by the state; the fender 15 is arranged on the vehicle frame 11 The two sides and can match with corresponding wheel 12, preferably, fender 15 is arc.

The trailer device 1 connected to the rear of the electric vehicle through the trailer mechanism 14 may also include a braking system (not shown). The braking system of the trailer device 1 may not be equipped on the premise of meeting the legal requirements. At this time, the mobile energy storage device 100 can be braked by the electric vehicle that tows the trailer device 1 .

In the embodiment of the present invention, the power supply device 2 is detachably connected to the frame 11 of the trailer device 1 through the connection assembly 16 . In order to facilitate the disassembly of the power supply device 2, the connection assembly 16 is preferably a quick disassembly mechanism or a quick disassembly bolt.

In the embodiment of the present invention, the backup power supply module 21 can select a backup power supply with appropriate capacitance and high cost performance according to the power consumption of the electric vehicle, the distance of the running distance, etc., for example, if the mass of the electric vehicle is small, the operation When the distance is relatively short, a backup power supply with a small capacity can be selected to reduce the weight of the trailer device 1, reduce the load on the electric vehicle, and avoid energy waste; on the contrary, if the mass of the electric vehicle is large, the running distance is relatively short When it is far away, it is necessary to choose a backup power supply with a large capacity to meet the energy demand of electric vehicles.

In an embodiment of the present invention, the conductive component 23 includes a wire 231 and a wiring component 232 connected to the wire 231 , and the wiring component 232 includes a wiring plug and/or a wiring socket. The wire 231 further includes a high-voltage wire harness 231a and a low-voltage wire harness 231b, and the wiring assembly 232 further includes a high-voltage connector 232a and a low-voltage connector 232b. The high-voltage wire harness 231a is connected to the backup power supply module 21 of the power supply device 2, and is connected to the power system of the electric vehicle through the high-voltage connector 232a on the backup power supply module 21 to transmit high-voltage energy; The power supply module 21 is connected, and is connected with the power consumption system of the electric vehicle through the low-voltage connector 232b on the backup power supply module 21 to transmit low-voltage energy. In addition, the low-voltage wiring harness 231a is also connected to the light module 17 on the trailer device 1 to transmit electric energy to the light module 17 .

In the embodiment of the present invention, after the control module 22 is connected to the backup power supply module 21, it is also connected to the power consumption system of the electric vehicle through the conductive component 23, and controls the backup power supply module 21 together with the vehicle controller of the electric vehicle and the power supply process of the vehicle power supply module. When the on-board power supply module of the electric vehicle loses power or is damaged, the vehicle controller judges whether the electric vehicle is in the acceleration state. If the electric vehicle is in the acceleration state, the vehicle controller needs to continue to judge whether the on-board power supply module can meet the driving power Need to wait for the acceleration to complete. If the vehicle-mounted power supply module can meet the drive power requirements and wait for the acceleration to complete, then after the electric vehicle accelerates, the backup power supply module 21 replaces the vehicle-mounted power supply module under the action of the control module 22 and the vehicle controller and supplies power to the electric vehicle. Power supply from the electric system; if the on-board power supply module cannot meet the driving power requirements and wait for the acceleration to complete, then the driving power needs to be forcibly reduced to zero (the forced reduction of the driving power requires a smooth process, and the vehicle speed should not be reduced too fast to prevent the driver of the electric vehicle from responding. Danger), then use the backup power supply module 21 to replace the on-board power supply module under the action of the control module 22 and the vehicle controller and supply power to the power system of the electric vehicle. If the electric vehicle is not accelerating, the backup power supply module 21 can be directly used to replace the on-board power supply module under the action of the control module 22 and the vehicle controller to supply power to the electrical system of the electric vehicle.

In an embodiment of the present invention, the light module 17 includes a brake light 171 (not shown) and a trailer taillight 172 arranged on the tail of the trailer device 1 and connected in parallel with the taillight of the electric vehicle through the conductive component 23. The trailer taillight 172 The low-voltage connector 232a is connected to the power system of the electric vehicle. When the electric vehicle turns or brakes, the trailer taillight 172 can work with the taillight of the car to give a light reminder to surrounding vehicles and pedestrians.

The mobile energy storage device provided by the present invention, the volume and weight of the backup power supply are not affected by the electric vehicle itself, has the advantages of large design freedom, easy portability, and can meet different driving mileage requirements; the mobile energy storage device and Electric vehicles can be quickly disassembled, and the shape and installation of mobile energy storage equipment are not affected by vehicle type, body form, etc., which is convenient for standardization and generalization; it is a mobile energy storage with low cost, high convenience and high versatility equipment.

Fig. 3 shows a joint control method of an electric vehicle and a mobile energy storage device according to an embodiment of the present invention, the method includes steps:

Condition judging step S110, judging whether the current state of the on-board power supply module of the electric vehicle satisfies the switching condition.

The above switching conditions include but are not limited to: the on-board power supply module has lost power, and cannot support the normal driving of the electric vehicle, or even cannot support its limited power driving; or the on-board power supply module has a serious failure and cannot normally supply power to the electric vehicle’s power system .

Acceleration judging step S120, if the switching condition is satisfied, it is judged whether the electric vehicle is in an accelerating state.

When the electric vehicle and the mobile energy storage device meet the above switching conditions, for example, the on-board power module has lost power at this time, the vehicle controller of the electric vehicle needs to determine whether the electric vehicle is in an acceleration state. Specifically, the vehicle controller detects the change of the input current in the drive motor of the electric vehicle through the current sensor. If the current increases with time, it is considered that the electric vehicle is in an acceleration state; if the current decreases with time, it is considered that the electric vehicle is accelerating. It is not in an acceleration state but in a deceleration state; if the current is constant over time, it is considered that the electric vehicle is not in an acceleration state but in a constant speed driving state (current > 0) or a stop state (current is 0).

Switch to step S130 in time, if the electric vehicle is not accelerating, use the backup power module in the mobile energy storage device to replace the on-board power module and supply power to the power system of the electric vehicle.

If the electric vehicle is not in the accelerating state, it can enter the switching process of the power supply. There are many ways to realize this process and different application combinations. This embodiment only introduces a simple and practical process. Switch down.

First, the vehicle controller of the electric vehicle can control the on-board power module to enter the power-off process. The power-off process includes: first disconnecting the negative DC contactor of the on-board power module, and then disconnecting the positive DC contactor of the on-board power module. Secondly, the power-on process of the backup power module 21 under the control of the vehicle controller control module 22 of the electric vehicle includes: first closing the positive DC contactor of the backup power module 21, and then closing the negative DC contactor of the backup power module 21, Complete the entire power-on process. In addition, the timely switching step includes a pre-charging process in addition to the above-mentioned power-off process and power-on process, and the pre-charge process is executed before the power-on process but later than the power-off process. Wherein, the pre-charging process is a conventional process in the art, and will not be repeated for space saving.

In this embodiment, the combined control method of an electric vehicle and a mobile energy storage device of the present invention may further include a switching prompt step S111 located between the condition judgment step S110 and the acceleration judgment step S120. The switching prompt step S111 includes: if the electric vehicle When the on-board power supply of the vehicle has run out of power, the power switching prompt function of the prompter in the electric vehicle is turned on, and the prompter includes a lamp, an electronic screen or a loudspeaker. For example, when the above switching conditions are met, the vehicle controller of the electric vehicle sends a "power switching prompt" signal to the instrument, lights up the "power switching prompt" signal light on the instrument, or displays the switching signal or prompt on the instrument display screen statement. Generally, the driver no longer controls the acceleration of the electric vehicle after receiving the signal of "power switching prompt", but the driver may also ignore the signal, and the electric vehicle will continue to accelerate.

In this embodiment, the joint control method of the electric vehicle and the mobile energy storage device may further include a delay switching step S130'. The postponing switching step S130' includes: if the electric vehicle is in an acceleration state, then forcibly and continuously reducing the output power of the on-board power supply module until the output power of the on-board power supply module is zero, using the backup power module of the mobile energy storage device instead of the on-board power supply module The power module supplies power to the power system of the electric vehicle. It should be noted that the forced reduction of driving power requires a smooth process, and it cannot be restricted too fast to prevent the driver from being unable to react and causing danger.

In this embodiment, the joint control method of electric vehicles and mobile energy storage equipment may further include a successful switching prompt step S140 after the timely switching step S130 and the delayed switching step S130', the successful switching prompting step S140 includes: turning on the electric The successful switching prompt function of the prompter in the vehicle, the prompter includes a lamp, an electronic screen or a loudspeaker. For example, after the power supply is switched successfully, the vehicle controller sends a signal of "power supply switching success indication" to the instrument, lights up the "power supply switching success indication" light on the instrument, or displays the switching success signal or prompt sentence on the instrument display , so far the entire switching control process is completed.

In this embodiment, the joint control method of the electric vehicle and the mobile energy storage device may also include the non-switching step S120', which further includes: if the electric vehicle and the mobile energy storage device do not meet the above switching conditions.

In this embodiment, if the whole vehicle controller is notified of one of the following situations, it will stop performing the following steps of the acceleration judgment step S120: the backup power supply module 21 has lost power and cannot support the normal running or limited power running of the electric vehicle; the backup power supply module 21 has Failure may not meet the requirements of the power system of the electric vehicle; or the driver wants to reserve the power of the backup power module 21 .

The combined control method of the electric vehicle and the mobile energy storage device provided by the present invention realizes the backup power supply module of the mobile energy storage device and the electric vehicle through the joint control of the control module of the mobile energy storage device and the vehicle controller of the electric vehicle. The switch between the vehicle power supply modules is simple and easy, the switching time is short and safe and reliable.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

In this application, unless otherwise clearly stipulated and limited, the terms "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. All of them should be covered by the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (10)

1. a kind of mobile energy storage device, which is characterized in that including：

Trailer equipment, the Trailer equipment are connectable on the tail portion of electric vehicle and can be dragged by it；

Power supply unit, the power supply unit are arranged on the Trailer equipment, and including standby power supply module and the standby electricity Source module connected control module and the control module can be linked into the electricity system of the electric vehicle conductive group Part, when the vehicle power module power shortage of the electric vehicle and when the electric vehicle is in non-acceleration mode, the backup power source Module can replace the vehicle power module and from it to the electricity under the action of control module and entire car controller The electricity system of motor-car is powered.

2. mobile energy storage device according to claim 1, which is characterized in that further include the tail that the Trailer equipment is arranged in In portion and pass through the conductive component tail lamp of trailer in parallel with the automobile tail light of the electric vehicle.

3. mobile energy storage device according to claim 2, which is characterized in that the conductive component includes conducting wire and and conducting wire Connected connector assembly, the connector assembly include jack-plug socket and/or connection plug.

4. mobile energy storage device according to claim 1, which is characterized in that the Trailer equipment include vehicle frame, suspension and Wheel and the towing mechanism for being arranged on the front of the vehicle frame and being connected with the tail portion of the electric vehicle, wherein the wheel The bottom of the vehicle frame is connected to by the suspension.

5. mobile energy storage device according to claim 1, which is characterized in that the Trailer equipment includes being arranged in the vehicle The two sides of frame and the arc mud guard that can be matched with the corresponding wheel.

6. mobile energy storage device according to claim 4, which is characterized in that the towing mechanism includes and the vehicle frame Front connects and the ontology extended forward, the pin being provided with along the axis direction interval perpendicular to the wheel on the ontology Nail hole and subtract material hole, wherein described subtract pin hole described in material boring ratio closer to the vehicle frame.

7. the combination control method of a kind of electric vehicle and mobile energy storage device, which is characterized in that its step includes：

Condition judgment step judges whether the current state of the vehicle power module of the electric vehicle meets switching condition, institute Stating switching condition includes vehicle power module power shortage；

If accelerating judgment step, meeting the switching condition, judge whether the electric vehicle is in acceleration mode；

If timely switch step, the electric vehicle are not in acceleration mode, the standby electricity in the mobile energy storage device is used Source module replaces the vehicle power module and is powered from it to the electricity system of the electric vehicle.

8. combination control method according to claim 7, which is characterized in that further include being located at after acceleration judgment step Switch step is postponed, which includes：If the electric vehicle is in acceleration mode, forces, persistently reduces institute The output power for stating vehicle power module uses the mobile storage when output power of the vehicle power module is zero The standby power supply module of energy equipment replaces the vehicle power module and is powered from it to the electricity system of the electric vehicle.

9. combination control method according to claim 7, which is characterized in that further include being located at condition judgment step and accelerating Switch prompting step between judgment step, the switch prompting step include：If the vehicle power supply of electric vehicle power shortage, The power supply switch prompting function of the prompting device in the electric vehicle is then opened, the prompting device includes lamp, electronic curtain or raises Sound device.

10. combination control method according to claim 8, which is characterized in that further include being located at timely switch step and pushing away Successful switch prompt step after slow switch step, the successful switch prompt step include：It opens in the electric vehicle The successful switch prompt facility of prompting device, the prompting device include lamp, electronic curtain or loudspeaker.