WO2024074044A1

WO2024074044A1 - Hybrid energy storage system apparatus for power supply of battery electric vehicle

Info

Publication number: WO2024074044A1
Application number: PCT/CN2023/095211
Authority: WO
Inventors: 卢承领; 杜成涛; 方杰; 张刚; 张磊; 吴学娟; 张进思
Original assignee: 皖西学院
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2024-04-11

Abstract

A hybrid energy storage system apparatus for the power supply of a battery electric vehicle. The apparatus comprises: a super capacitor (2), a bidirectional DC/DC converter (3), a traction battery (4) and an electric motor (5), which are arranged on a surface of a battery electric vehicle chassis (1), wherein the bidirectional DC/DC converter (3) is detachably mounted, and the traction battery (4) is provided with a damping device. The apparatus utilizes the characteristic of large-current charging and discharging of the super capacitor, and the continuous traveling function of a battery electric vehicle is achieved by means of rapid and convenient small-capacity energy replenishment being performed multiple times, thereby greatly reducing the cost of the whole battery electric vehicle, reducing the weight of the whole vehicle, and improving the energy utilization efficiency.

Description

A hybrid energy storage system device for powering electric vehicles

Technical Field

The present invention relates to the technical field of electric vehicles, and in particular to a hybrid energy storage system device for powering electric vehicles.

Background technique

Battery electric vehicles (BEV) refer to vehicles that use onboard power as a power source, use motors to drive wheels, and comply with various requirements of road traffic and safety regulations. As their impact on the environment is relatively small compared to traditional vehicles, their prospects are widely optimistic.

In the prior art, when the power of an electric vehicle is too low during driving, a charging station is used to charge the battery inside the electric vehicle to meet driving requirements. In order to improve the endurance of the electric vehicle, a large number of energy storage power batteries are loaded on the electric vehicle or a battery replacement method is adopted.

However, when a large number of energy storage batteries are used to achieve this, the batteries are expensive and greatly increase the weight of the vehicle. When the battery replacement method is used, due to the large differences in the structure of electric vehicles, battery modules are difficult to standardize and cannot be popularized on a large scale. In addition, frequent battery replacement brings a lot of safety and reliability risks to the electrical and mechanical equipment interfaces of the battery pack.

Summary of the invention

The purpose of the present invention is to provide a hybrid energy storage system device for powering electric vehicles to solve the problems raised in the above background technology.

To achieve the above object, the present invention provides the following technical solution: a hybrid energy storage system device for electric vehicle power supply, the hybrid energy storage system device for electric vehicle power supply comprising: an electric vehicle chassis, a supercapacitor, a bidirectional DC/DC converter, a power battery, and a motor are arranged on the surface of the electric vehicle chassis, a groove is opened on the side of the electric vehicle chassis, and a lifting plate is arranged on the side of the groove;

A vertical plate, a hole is opened on the side of the vertical plate, a positioning rod is inserted into the hole, a traction rope is arranged at one end of the positioning rod, a rotating shaft is arranged on the side of the groove, a pulley is sleeved on the surface of the rotating shaft, and a spring is sleeved on the surface of the positioning rod;

A screw rod has a buffer plate sleeved at one end of the screw rod, a buffer spring is arranged on the surface of the buffer plate, a bottom plate is arranged at one end of the buffer spring, a support rod is arranged on the surface of the bottom plate, a bearing is arranged at one end of the support rod, and a rotating plate is inserted into the inner ring surface of the bearing.

Preferably, a placement groove and a fixing groove are provided on the surface of the chassis of the electric vehicle, the supercapacitor is fixed in the fixing groove by bolts, a movable groove is provided on the side of the placement groove, and the power battery is placed in the placement groove.

Preferably, a mounting plate is provided on the side of the bidirectional DC/DC converter, a through hole is opened on the mounting side, the mounting plate is fixedly connected to the side of the bidirectional DC/DC converter, and the positioning rod can be inserted into the through hole.

Preferably, the bottom of the vertical plate is fixedly connected to the surface of the chassis of the electric vehicle, and two groups of vertical plates are provided, which are symmetrically distributed about the spring. One end of the spring is fixedly connected to the side of one group of vertical plates, and the other end of the spring is fixedly connected to the surface of the positioning rod. The traction rope arranged at one end of the positioning rod is passed around the pulley.

Preferably, a slide groove is provided on the surface of the lifting plate, a slide hole is provided on the side of the slide groove, a push plate is arranged in the slide groove, the push plate is a "T"-shaped plate structure, one end of the push plate is inserted into the slide hole, a positioning groove is provided on the surface of the push plate, and the traction rope is placed in the positioning groove.

Preferably, the groove is a square plate-shaped structure, and two groups of grooves are provided. The two groups of grooves are symmetrically distributed about the chassis of the electric vehicle. One end of the rotating shaft is fixedly connected to the side of the groove, and the pulley can slide around the rotating shaft.

Preferably, one end of the screw is fixedly connected to the bottom of the movable groove, a scale is provided on the side of the placement groove, and a limiting groove is provided on the side of the movable groove.

Preferably, the buffer plate is in a square plate-shaped structure, a second hole is opened on the surface of the buffer plate, a damping pad is arranged in the second hole, and an inner annular surface of the damping pad is in contact with the surface of the screw.

Preferably, one end of the buffer spring is fixedly connected to the surface of the buffer plate, and the other end of the buffer spring is fixedly connected to the lower surface of the bottom plate, and the buffer spring is sleeved on the screw rod.

Preferably, a guide block is provided on the side of the base plate, the guide block is inserted into the limiting groove, one end of the guide block is fixedly connected to the side of the base plate, the rotating plate is threadedly connected to the screw rod, and a handle is provided on the surface of the rotating plate.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention proposes a hybrid energy storage system device for powering electric vehicles. It utilizes the characteristics of supercapacitors that can be charged and discharged with large currents, and through multiple fast and convenient small-capacity energy supplements, it transfers the energy in the auxiliary supercapacitor to a smaller power battery than traditional pure electric vehicles or directly drives the vehicle through a controllable bidirectional DC/DC converter. It can realize the continuous driving function of electric vehicles and solve the shortcomings of pure electric vehicles that are affected by insufficient endurance. Since the system is matched with an auxiliary energy storage system and realizes rapid energy acquisition, the on-board power battery system of the electric vehicle itself can be greatly reduced, thereby greatly reducing the cost of the entire electric vehicle, reducing the weight of the vehicle, and improving energy utilization efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the chassis of an electric vehicle structure according to the present invention;

FIG2 is a side view of the chassis of the electric vehicle of the present invention;

FIG3 is a schematic diagram of the enlarged structure of point A in FIG2;

FIG4 is a top view of the chassis of the electric vehicle of the present invention;

FIG5 is a schematic diagram of the structure of the lifting plate of the present invention;

FIG6 is a partial cross-sectional view of the chassis of the electric vehicle of the present invention;

FIG7 is a schematic diagram of the enlarged structure of point B in FIG6;

FIG8 is a schematic diagram of the screw structure of the present invention;

FIG9 is a schematic diagram of the structure of the buffer spring of the present invention;

FIG. 10 is a structural system diagram of the present invention.

In the figure: 1. chassis of electric vehicle; 2. supercapacitor; 3. bidirectional DC/DC converter; 4. power battery; 5. motor; 6. groove; 7. lifting plate; 8. vertical plate; 9. positioning rod; 10. traction rope; 11. rotating shaft; 12. pulley; 13. spring; 14. screw; 15. buffer plate; 16. buffer spring; 17. bottom plate; 18. support rod; 19. bearing; 20. rotating plate; 21. placement groove; 22. moving groove; 23. fixed groove; 24. mounting plate; 25. through hole; 26. slide groove; 27. slide hole; 28. push plate; 29. positioning groove; 30. scale; 31. limit groove; 32. damping pad; 33. guide block; 34. handle.

Detailed ways

In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

Embodiment 1

Please refer to Figures 1 to 10. The present invention provides a technical solution: a hybrid energy storage system device for powering an electric vehicle, the hybrid energy storage system device for powering an electric vehicle comprises: an electric vehicle chassis 1, a super capacitor 2, a bidirectional DC/DC converter 3, a power battery 4, and a motor 5 are arranged on the surface of the electric vehicle chassis 1, a groove 6 is provided on the side of the electric vehicle chassis 1, and a lifting plate 7 is provided on the side of the groove 6; a vertical plate 8, a hole is provided on the side of the vertical plate 8, a positioning rod 9 is inserted into the hole, a traction rope 10 is provided at one end of the positioning rod 9, a rotating shaft 11 is provided on the side of the groove 6, a pulley 12 is sleeved on the surface of the rotating shaft 11, and a spring 13 is sleeved on the surface of the positioning rod 9; a screw 14, a buffer plate 15 is sleeved on one end of the screw 14, a buffer spring 16 is arranged on the surface of the buffer plate 15, a bottom plate 17 is arranged on one end of the buffer spring 16, a support rod 18 is provided on the surface of the bottom plate 17, a bearing 19 is provided at one end of the support rod 18, and a rotating plate 20 is inserted into the inner ring surface of the bearing 19;

By utilizing the large current charge and discharge characteristics of the supercapacitor 2, through multiple fast and convenient small-capacity energy supplements, and then transferring the energy in the auxiliary supercapacitor 2 to a smaller power battery 4 than that of a traditional pure electric vehicle through a controllable bidirectional DC/DC converter 3, or directly driving the vehicle to move forward, the electric vehicle can achieve continuous driving function, solving the shortcomings of the pure electric vehicle's performance affected by insufficient endurance. Since the system is matched with an auxiliary energy storage system and realizes rapid energy acquisition, the on-board power battery system of the electric vehicle itself can be greatly reduced, thereby greatly reducing the cost of the entire electric vehicle, reducing the weight of the entire vehicle, and improving energy utilization efficiency.

Embodiment 2

On the basis of the first embodiment, a placement groove 21 is provided, a placement groove 21 and a fixing groove 23 are provided on the surface of the chassis 1 of the electric vehicle, the supercapacitor 2 is fixed in the fixing groove 23 by bolts, a movable groove 22 is provided on the side of the placement groove 21, the power battery 4 is placed in the placement groove 21, a mounting plate 24 is provided on the side of the bidirectional DC/DC converter 3, a through hole 25 is provided on the side of the mounting plate 24, the mounting plate 24 is fixedly connected to the side of the bidirectional DC/DC converter 3, the positioning rod 9 can be inserted into the through hole 25, the bottom of the vertical plate 8 is fixedly connected to the surface of the chassis 1 of the electric vehicle, the vertical plate 8 is provided with two groups, the two groups of vertical plates 8 are symmetrically distributed about the spring 13, and one end of the spring 13 is fixedly connected On the side of a set of vertical plates 8, the other end of the spring 13 is fixedly connected to the surface of the positioning rod 9, and the traction rope (10) arranged at one end of the positioning rod 9 passes around the pulley 12. A sliding groove 26 is opened on the surface of the lifting plate 7, and a sliding hole 27 is opened on the side of the sliding groove 26. A push plate 28 is arranged in the sliding groove 26. The push plate 28 is a "T"-shaped plate structure. One end of the push plate 28 is inserted into the sliding hole 27. A positioning groove 29 is opened on the surface of the push plate 28. The traction rope 10 is placed in the positioning groove 29. The groove 6 is a square plate structure. The groove 6 is provided with two groups. The two groups of grooves 6 are symmetrically distributed about the electric vehicle chassis 1. One end of the rotating shaft 11 is fixedly connected to the side of the groove 6, and the pulley 12 can slide around the rotating shaft 11.

During use, when the bidirectional DC/DC converter 3 needs to be disassembled and repaired, the push plate 28 can be pushed upward to move the push plate 28 upward along the slide slot 26. The upward movement of the push plate 28 can be used to pull the traction rope 10, and then one end of the positioning rod 9 can be pulled out of the through hole 25, and then the bidirectional DC/DC converter 3 can be removed from the electric vehicle chassis 1. When the bidirectional DC/DC converter 3 needs to be installed, the bidirectional DC/DC converter 3 can be directly placed on the electric vehicle chassis 1, and then the push plate 28 is released. Then the traction rope 10 uses the elastic force of the spring 13 to reset the positioning rods 9 at both ends of the mounting plate 24 to be inserted into the through hole 25 to re-fix the bidirectional DC/DC converter 3. The setting of the traction rope 10 can make the two groups of positioning rods 9 move at the same time.

Embodiment 3

On the basis of the second embodiment, a screw rod 14 is provided, one end of the screw rod 14 is fixedly connected to the bottom of the moving groove 22, a scale 30 is provided on the side of the placement groove 21, a limiting groove 31 is provided on the side of the moving groove 22, the buffer plate 15 is a square plate structure, a second hole is provided on the surface of the buffer plate 15, a damping pad 32 is provided in the second hole, the inner annular surface of the damping pad 32 contacts the surface of the screw rod 14, one end of the buffer spring 16 is fixedly connected to the surface of the buffer plate 15, the other end of the buffer spring 16 is fixedly connected to the lower surface of the bottom plate 17, the buffer spring 16 is sleeved on the screw rod 14, a guide block 33 is provided on the side of the bottom plate 17, the guide block 33 is inserted into the limiting groove 31, one end of the guide block 33 is fixedly connected to the side of the bottom plate 17, the rotating plate 20 is threadedly connected to the screw rod 14, and a handle 34 is provided on the surface of the rotating plate 20;

When in use, the power battery 4 is placed on the buffer plate 15 in the placement groove 21. In this way, when the electric car is driving on a bumpy road, the power battery 4 can be protected by the buffer spring 16 arranged on the surface of the buffer plate 15. The setting of the damping pad 32 can prevent the buffer spring 16 from constantly shaking up and down on the screw 14, and then the handle 34 can be rotated to rotate the rotating plate 20 on the screw 14, so that the compression amount of the buffer spring 16 can be adjusted, thereby adjusting the buffering degree of the power battery 4. The guide block 33 is inserted into the limit groove 31 to prevent the buffer spring 16 from rotating. The setting of the bearing 19 can prevent the bottom plate 17 from rotating when the rotating plate 20 rotates, and the support rod 18 can prevent rotation.

In actual use, by utilizing the characteristics of the supercapacitor 2 that can charge and discharge with large currents, through multiple fast and convenient small-capacity energy supplements, and then through the controllable bidirectional DC/DC converter 3, the energy in the auxiliary supercapacitor 2 is transferred to the power battery 4 which is smaller than the traditional pure electric vehicle or directly drives the vehicle to move, the continuous driving function of the electric vehicle can be realized, which solves the shortcomings of the pure electric vehicle's performance affected by insufficient endurance. Since the system matches the auxiliary energy storage system and realizes rapid energy acquisition, the on-board power battery system of the electric vehicle itself can be greatly reduced, thereby greatly reducing the cost of the entire electric vehicle, reducing the weight of the vehicle, and improving energy utilization efficiency. This avoids the traditional method of loading a large number of energy storage power batteries 4 to achieve the high battery price and greatly increase the weight of the vehicle. When the battery replacement method is adopted, due to the large structural differences of electric vehicles, the battery module is difficult to standardize and cannot be widely popularized. In addition, frequent battery replacement brings a lot of safety and reliability risks to the electrical and mechanical equipment interfaces of the battery pack.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A hybrid energy storage system device for powering an electric vehicle, characterized in that the hybrid energy storage system device for powering an electric vehicle comprises: an electric vehicle chassis (1), a supercapacitor (2), a bidirectional DC/DC converter (3), a power battery (4), and a motor (5) are arranged on the surface of the electric vehicle chassis (1), a groove (6) is opened on the side of the electric vehicle chassis (1), and a lifting plate (7) is arranged on the side of the groove (6);

A vertical plate (8), a hole is formed on the side of the vertical plate (8), a positioning rod (9) is inserted into the hole, a traction rope (10) is arranged at one end of the positioning rod (9), a rotating shaft (11) is arranged on the side of the groove (6), a pulley (12) is sleeved on the surface of the rotating shaft (11), and a spring (13) is sleeved on the surface of the positioning rod (9);

A screw rod (14) is provided with a buffer plate (15) at one end of the screw rod (14), a buffer spring (16) is provided on the surface of the buffer plate (15), a bottom plate (17) is provided at one end of the buffer spring (16), a support rod (18) is provided on the surface of the bottom plate (17), a bearing (19) is provided at one end of the support rod (18), and a rotating plate (20) is inserted into the inner ring surface of the bearing (19).
According to claim 1, a hybrid energy storage system device for powering electric vehicles is characterized in that: a placement groove (21) and a fixing groove (23) are provided on the surface of the electric vehicle chassis (1), the supercapacitor (2) is fixed in the fixing groove (23) by bolts, a movable groove (22) is provided on the side of the placement groove (21), and the power battery (4) is placed in the placement groove (21).
A hybrid energy storage system device for powering an electric vehicle according to claim 2, characterized in that: a mounting plate (24) is provided on the side of the bidirectional DC/DC converter (3), a through hole (25) is provided on the side of the mounting plate (24), the mounting plate (24) is fixedly connected to the side of the bidirectional DC/DC converter (3), and the positioning rod (9) can be inserted into the through hole (25).
According to claim 3, a hybrid energy storage system device for powering an electric vehicle is characterized in that: the bottom of the vertical plate (8) is fixedly connected to the surface of the chassis (1) of the electric vehicle, two groups of vertical plates (8) are provided, and the two groups of vertical plates (8) are symmetrically distributed about the spring (13), one end of the spring (13) is fixedly connected to the side of one group of vertical plates (8), and the other end of the spring (13) is fixedly connected to the surface of the positioning rod (9), and the traction rope (10) provided at one end of the positioning rod (9) is passed around the pulley (12).
According to claim 4, a hybrid energy storage system device for powering an electric vehicle is characterized in that: a slide groove (26) is provided on the surface of the lifting plate (7), a slide hole (27) is provided on the side of the slide groove (26), a push plate (28) is provided in the slide groove (26), and the push plate (28) is in a "T"-shaped plate structure. One end of the push plate (28) is inserted into the slide hole (27), and a positioning groove (29) is provided on the surface of the push plate (28), and the traction rope (10) is placed in the positioning groove (29).
According to claim 5, a hybrid energy storage system device for powering an electric vehicle is characterized in that: the groove (6) is a square plate structure, two groups of grooves (6) are provided, the two groups of grooves (6) are symmetrically distributed about the electric vehicle chassis (1), one end of the rotating shaft (11) is fixedly connected to the side of the groove (6), and the pulley (12) can slide around the rotating shaft (11).
According to claim 6, a hybrid energy storage system device for powering an electric vehicle is characterized in that one end of the screw rod (14) is fixedly connected to the bottom of the movable groove (22), a scale (30) is provided on the side of the placement groove (21), and a limit groove (31) is provided on the side of the movable groove (22).
According to claim 7, a hybrid energy storage system device for powering an electric vehicle is characterized in that: the buffer plate (15) is a square plate structure, a second hole is opened on the surface of the buffer plate (15), a damping pad (32) is arranged in the second hole, and the inner ring surface of the damping pad (32) contacts the surface of the screw (14).
According to claim 8, a hybrid energy storage system device for powering an electric vehicle is characterized in that one end of the buffer spring (16) is fixedly connected to the surface of the buffer plate (15), and the other end of the buffer spring (16) is fixedly connected to the lower surface of the bottom plate (17), and the buffer spring (16) is sleeved on the screw rod (14).
According to claim 9, a hybrid energy storage system device for powering an electric vehicle is characterized in that: a guide block (33) is provided on the side of the base plate (17), the guide block (33) is inserted into the limiting groove (31), one end of the guide block (33) is fixedly connected to the side of the base plate (17), the rotating plate (20) is threadedly connected to the screw rod (14), and a handle (34) is provided on the surface of the rotating plate (20).