CN116278940A

CN116278940A - Battery fixing device and fixing method for new energy battery power-exchanging vehicle

Info

Publication number: CN116278940A
Application number: CN202310201648.4A
Authority: CN
Inventors: 黄国珍; 唐利中; 吕晓彤; 吴海波; 李炭
Original assignee: SAIC Volkswagen Automotive Co Ltd
Current assignee: SAIC Volkswagen Automotive Co Ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-06-23

Abstract

The invention provides a battery fixing device and a battery fixing method for a new energy battery power-exchanging vehicle. The invention maintains the unification of the trolley-changing type and the non-trolley-changing type vehicle body to the maximum extent by a method of directly installing the double-end stud on the vehicle body on the premise of not changing the original vehicle body structure. The battery fixing device provided by the invention comprises: the locking mechanism comprises a fastening mechanism, a floating alignment mechanism and a locking mechanism. The battery fixing device is fixed on the power battery pack shell, a vehicle body structure is not required to be changed, or a battery switching support is not required to be additionally arranged, so that the battery fixing device is less in sacrifice of a ground clearance and is beneficial to standardized development of electric vehicle battery replacement.

Description

Battery fixing device and fixing method for new energy battery power-exchanging vehicle

Technical Field

The invention relates to the field of new energy automobiles, in particular to a battery fixing device and a battery fixing method for a new energy battery power-changing vehicle.

Background

Compared with the traditional fuel oil automobile, the electric automobile has the advantages of environmental protection, high intelligent degree and the like, and has important significance for energy conservation, emission reduction and urban traffic intelligent, so the electric automobile gradually becomes the strategic development direction of the future automobile industry. However, the electric vehicle battery has high price, short endurance mileage and long charging time, and needs to be continuously charged for about 30 minutes even in the fast charging mode, which are all important factors for restricting the development of the electric vehicle battery.

In order to solve the problem of difficult charging of the electric automobile, a power conversion technology is generated. The electric automobile can exchange the vehicle-mounted dead battery with the battery fully charged on the battery rack through the automatic battery exchange equipment of the battery exchange station, so that the continuous voyage of the automobile is ensured, the whole battery exchange process is generally not more than 5 minutes, and the battery exchange equipment is a brand new mode for replacing long-time charging of the electric automobile. The main current power conversion modes can be divided into chassis power conversion, module box-division power conversion and side power conversion, wherein the chassis power conversion is favored by more vehicle enterprises because of short power conversion time, full-automatic power conversion and more guarantee of the safety and the running performance of the vehicle.

The chassis power exchanging method can be divided into threaded connection, buckle connection and battery transferring support installation, but the problems that the chassis structure needs to be changed, the ground clearance of the automobile is reduced, the maintenance cost is high and the like are needed to be solved. For example, patent (CN 217672242U) issued by the new energy automobile limited company relates to a quick-change bracket and an electric automobile, where the quick-change bracket includes a longitudinal beam, a cross beam and an adapter, and the adapter is adopted to realize quick and accurate connection between the cross beam and the longitudinal beam while ensuring structural strength, see fig. 1. Through installing the switching support in this patent below the automobile body, can make the electric motor car that does not possess originally and trade the electric function realize quick tear open and trade of battery to reach the purpose of quick moisturizing. However, such brackets increase the weight and width of the vehicle body and reduce the height of the vehicle above the ground.

Disclosure of Invention

The invention aims to provide a battery fixing device and a fixing method for a new energy battery power-changing vehicle, wherein the battery fixing device is fixed on a power battery pack shell, a vehicle body structure is not required to be changed, or a battery switching support is not required to be additionally arranged, so that the battery fixing device is less in sacrifice of a ground clearance and beneficial to standardized development of electric vehicle power-changing.

In order to achieve the above object, the present invention provides a battery fixing device of a new energy battery-powered vehicle, the battery fixing device comprising:

the fastening mechanism comprises a first connecting piece, and a first end of the first connecting piece is arranged on a vehicle body threshold;

the floating alignment mechanism comprises a second connecting piece, a guide plate and a transmission bracket, wherein the second end of the first connecting piece is detachably connected with the second connecting piece through a battery pack fixing hole in a battery pack shell, a plurality of transmission rods are arranged on the transmission bracket, part of transmission rods are connected with the second connecting piece, the other part of transmission rods are connected with the guide plate, the second connecting piece can carry out displacement adjustment in the Y direction, and the guide plate can carry out displacement adjustment in the X direction;

the locking mechanism comprises an elastic supporting piece and a locking sleeve, wherein the elastic supporting piece is arranged between the guide plate and the second connecting piece so as to support the second connecting piece, and the locking sleeve is arranged below the guide plate so as to lock the guide plate;

the X, Y directions are mutually perpendicular, and the X direction is the driving direction.

In one embodiment, the upper surface of the locking sleeve and the lower surface of the guide plate are provided with mutually matched tooth grooves, and the upper surface of the locking sleeve and the lower surface of the guide plate are locked through the mutually matched tooth grooves.

In one embodiment, the battery fixing device further comprises a device housing, the device housing is arranged on the outer side of the battery fixing device, and a device fixing hole is formed in the lower portion of the device housing and used for being connected with the battery shell.

In one embodiment, the fastening mechanism further comprises a fixing piece, the fixing piece is arranged on the inner side of the car body threshold, the fixing piece is provided with a through hole, the aperture of the through hole is matched with the aperture of the chassis positioning hole in the car body threshold, and the first end of the first connecting piece is connected with the fixing piece through the chassis positioning hole to be fixed on the car body threshold.

In one embodiment, the securing member is a securing nut.

In one embodiment, the second connector is a floating nut.

In one embodiment, the first end and the second end of the first connecting member are both provided with threads, the threads of the first end of the first connecting member are matched with the internal threads of the fixing nut, and the threads of the second end of the first connecting member are matched with the internal threads of the floating nut and are detachably connected.

In one embodiment, the first connector is a stud.

In one embodiment, the resilient support is a return spring.

The invention also provides a battery fixing method of the new energy battery power-changing vehicle, which is applied to the battery fixing device of the new energy battery power-changing vehicle, and comprises the following steps:

raising the full-power battery pack in the battery exchange station and enabling a battery pack fixing hole on the battery pack shell to be basically aligned with a first connecting piece fixed on a vehicle body threshold;

the locking and unlocking gun ascends and the second connecting piece is completely aligned with the first connecting piece by adjusting the floating alignment mechanism;

when the second connecting piece is aligned with the first connecting piece, the transmission bracket and the guide plate fall onto the locking sleeve to be locked under the action of gravity and the elastic piece;

the movable sleeve on the locking and unlocking gun is rotated to enable the second connecting piece to be connected and fixed with the first connecting piece.

The battery fixing device and the fixing method for the new energy battery power-exchanging vehicle have the following beneficial effects:

1. the floating alignment mechanism can realize the rapid and accurate alignment of the locking and unlocking gun and the battery pack shell under the unmanned operation, and simultaneously has simpler and more compact structure and smaller volume, thereby saving the die sinking and manufacturing cost of complex parts.

2. The tooth grooves are designed in the plane perpendicular to the axis of the threads to prevent the threads from loosening, so that the axial dimension of the device is effectively reduced.

3. The invention directly uses the original battery pack fixing hole of the battery pack shell, and the original battery pack is basically not required to be changed by connecting the battery fixing device through threads.

4. Compared with the arrangement of the power conversion device on the automobile chassis, the arrangement of the power conversion device in the battery pack shell does not need to change the structure of the automobile chassis, so that unification of the power conversion vehicle and the non-power conversion vehicle body is realized to the maximum extent, and meanwhile, the reduction of the whole vehicle ground clearance due to the use of the battery switching support is avoided, and the vehicle passing performance is influenced.

5. The double-end stud is directly installed on the vehicle body, the reliability is higher, the service life is longer, if screw thread damage occurs in the later stage, the disassembly and maintenance are more convenient, and the maintenance cost is lower.

6. The battery fixing device in the aspect can be designed into a standard component, and is shared by multiple vehicle types, so that the cost is reduced, and the standardization of power conversion is realized.

Drawings

Fig. 1 is a schematic structural diagram of a quick-change bracket in chinese patent CN 217672242U;

FIG. 2 is a schematic view illustrating an assembly of a battery fixing device of a new energy battery-powered vehicle in a vehicle body according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a battery fixing device of a new energy battery powered vehicle according to an embodiment of the present invention;

FIG. 4 is an exploded view of a floating alignment mechanism according to one embodiment of the present invention;

FIG. 5 is a cross-sectional view of a floating alignment mechanism according to one embodiment of the present invention; wherein, (a) is a structural schematic diagram of the floating alignment mechanism, (B) is a sectional view along A-A section line in (a), and (c) is a sectional view along B-B section line in (a);

FIG. 6 is a schematic structural view of a locking mechanism according to an embodiment of the present invention;

FIG. 7 is an enlarged partial schematic view of a power cell pack;

FIG. 8 is a schematic view illustrating a battery fixing device of a new energy battery powered vehicle according to an embodiment of the present invention;

FIG. 9 is an enlarged schematic view of a portion of a chassis of a vehicle model;

fig. 10 is a schematic diagram of a battery fixing method of a new energy battery replacing vehicle according to an embodiment of the invention.

Reference numerals

A1, a longitudinal beam; a11, a longitudinal beam body; a17, a first longitudinal subsection; a18, a second longitudinal subsection; a19, a third longitudinal subsection; a153, third communication hole; a2, a cross beam; a21, a beam body; a4, locking mechanism; a7, an electric connector; a9, a limiting component;

100. a vehicle body threshold; 101. a chassis positioning hole; 200. a battery pack case; 201. a battery pack fixing hole; 300. a battery fixing device; 31. a fastening mechanism; 32. a floating alignment mechanism; 33. locking mechanism; 1. a double-ended stud; 2. a fixing nut; 3. a floating nut; 4. a device housing; 5. a return spring; 6. a transmission bracket; 7. a guide plate; 8. a locking sleeve; 9. and a device fixing hole.

Detailed Description

The present invention will be described in detail below with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 2 and 3, a battery fixing device 300 of a new energy battery-powered vehicle according to an embodiment of the present invention includes: a fastening mechanism 31, a floating alignment mechanism 32, and a locking mechanism 33. The fastening mechanism 31 includes a first connecting member provided on the rocker 100. The floating alignment mechanism 32 reserves adjustment amounts in the X direction and the Y direction, so that displacement adjustment can be carried out in the X direction and the Y direction, automatic alignment during power change can be realized, and the power change efficiency and success rate are greatly improved. The floating alignment mechanism 32 comprises a second connector, a guide plate 7 and a drive bracket 6, see fig. 4-5. The second end of the first connector is detachably connected to the second connector through the battery pack fixing hole 201 of the battery pack case 200. The transmission support 6 is provided with a plurality of transmission rods, part of the transmission rods are connected with the second connecting piece, and the other part of the transmission rods are connected with the guide plate 7, so that the transmission torque can be realized. The second connector can be displaced in the Y direction, and the guide plate 7 can be displaced in the X direction. The lock mechanism 33 shares one guide plate 7 with the floating alignment mechanism 32. The locking mechanism 33 further comprises an elastic support and a locking sleeve 8, see fig. 6. An elastic support is installed between the guide plate 7 and the second connection member to support the second connection member. A locking sleeve 8 is provided under the guide plate 7 to lock the floating alignment mechanism 32. The X, Y directions are mutually perpendicular, and the X direction is the driving direction.

Further, the upper surface of the locking sleeve 8 and the lower surface of the guide plate 7 are respectively provided with mutually matched tooth grooves, and the upper surface of the locking sleeve 8 and the lower surface of the guide plate 7 are locked by the mutually matched tooth grooves, see fig. 6. The present embodiment preferably has the tooth slot design in the plane of the vertical thread axis.

Further, the fastening mechanism further includes a fixing member. The fixing member is provided on the inner side of the rocker 100. The fixing member is provided with a through hole, and the aperture of the through hole is matched with the aperture of the chassis positioning hole 101 in the car body threshold 100. The first end of the first connecting member is connected to the fixing member through the chassis positioning hole 101 to be fixed to the vehicle body threshold 100. In this embodiment, the fixing member is preferably a fixing nut 2, see fig. 3 and 8.

In this embodiment, the second connecting member is preferably a floating nut 3.

Further, the first end and the second end of the first connector are both threaded. The threads of the first end of the first connecting piece are matched with the internal threads of the fixing nut 2, and the threads of the second end of the first connecting piece are matched with the internal threads of the floating nut 3 and can be detachably connected.

In this embodiment, the first connecting member is preferably a stud 1. As shown in fig. 9, the first end of the stud 1 is screwed with the fixing nut 2 through the chassis positioning hole 101 to be fixed on the door sill. The second end of the stud 1 passes through the battery pack securing aperture 201 and is threaded with the floating nut 3.

The floating nut 3 floats on the transmission bracket 6, an adjustment amount is reserved in the Y direction, and mobile alignment in the Y direction can be realized during power change. The guide plate 7 plays a certain guiding and positioning role on the driving support 6, and meanwhile, an adjusting amount is reserved in the X direction, so that the driving support can move in an appropriate amount in the X direction.

Therefore, during the process of lifting the floating nut 3, the transmission rods can simultaneously perform proper movement in the X direction and the Y direction to realize automatic alignment during battery installation and realize threaded connection with the stud 1. The floating alignment mechanism not only has the adjustability in the X direction and the Y direction, but also has simple structure and high reliability, and greatly reduces the die opening, the processing cost and the maintenance cost of complex parts.

In this embodiment, the elastic support is preferably a return spring 5. The return spring 5 is mounted between the guide plate 7 and the floating nut 3, see fig. 6. When the floating nut 3 is lifted and aligned with the stud 1, the return spring 5 mainly plays a role of supporting the floating nut 3 to prevent it from slipping down. And the lower surface of the guide plate 7 and the upper surface of the locking sleeve 8 are provided with tooth grooves, when the floating nut 3 and the double-end stud 1 are in threaded connection, the transmission support 6 and the guide plate 7 fall onto the locking sleeve 8 under the action of gravity and the reset spring 5, can be blocked by the tooth grooves on the surface, avoid loosening and falling caused by external force and vibration after the battery is installed, and greatly improve the reliability of battery fixation.

Still further, the battery holder 300 further includes a device housing 4. The device housing 4 is provided on the outside of the battery fixing device 300 to protect the battery fixing device from impact failure and to ensure the normal operation of the battery fixing device. The device housing 4 is provided at a lower portion thereof with a device fixing hole 9, which is coupled to the battery pack housing 200 by screw coupling, see fig. 8. Therefore, a battery switching support is not required to be additionally arranged on the chassis of the automobile, and the sacrifice on the ground clearance of the whole automobile is small.

The battery fixing method of the new energy battery power-exchanging vehicle comprises the following steps:

the full-power battery pack rises and enables a battery pack fixing hole on the battery pack shell to be basically aligned with a first connecting piece fixed on a vehicle body threshold;

when the second connecting piece is connected with the first connecting piece, the transmission bracket and the guide plate fall onto the locking sleeve to be locked under the action of gravity and the elastic piece;

Fig. 10 shows a battery replacement scheme based on a certain vehicle model and using a battery fixing device and a fixing method according to an embodiment of the present invention, and a specific operation method and principle are as follows:

the first end of the stud 1 is fixedly attached to the door sill 100, see fig. 9. The locking and unlocking gun and the movable sleeve in the power exchange station are lifted, the guide plate 7 is rotated, the floating nut 3 is unscrewed through the torque transmitted by the transmission bracket 6, and the spent battery pack is detached from the automobile chassis. The full pack is raised and the pack attachment holes 201 in the pack housing 200 are substantially aligned with the studs 1, and the locking and unlocking gun is raised and the floating nut 3 is adjusted by the floating alignment mechanism 32 in the X and Y directions to be fully aligned with the studs 1. Finally, the movable sleeve on the locking and unlocking gun is rotated to enable the floating nut 3 to be in threaded connection with the second end of the double-end stud 1 on the car body threshold 100 so as to complete the whole power exchanging process. The power conversion method can realize the accurate alignment of the battery pack and the double-end stud arranged on the car threshold without manual operation, reduces the cost and greatly improves the power conversion efficiency and success rate.

It should be understood that terms such as "upper," "lower," and the like in this application refer to an orientation or positional relationship and are merely for convenience of description and to simplify the description, and are not meant to necessarily have a particular orientation, to be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. The terms "first," "second," and the like, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order, or vice versa. Furthermore, unless specifically stated or limited otherwise, the terms "mounted," "connected," "configured," and the like as used in the description herein should be construed broadly and construed, e.g., as a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements, and the specific meaning of the two elements can be understood by a person skilled in the art according to specific situations.

The above embodiments are merely further illustrative of the present invention and are not intended to limit the present invention in any way, and various other embodiments are possible. Various modifications and alterations of this invention will become apparent to those skilled in the art without departing from the spirit and substance of this invention, and it is intended to cover all such modifications and alterations as fall within the scope of this invention.

Claims

1. A battery fixing device of a new energy battery change vehicle, characterized in that the battery fixing device comprises:

2. The battery fixing device of the new energy battery changing vehicle according to claim 1, wherein the upper surface of the locking sleeve and the lower surface of the guide plate are provided with mutually matched tooth grooves, and the upper surface of the locking sleeve and the lower surface of the guide plate are locked through the mutually matched tooth grooves.

3. The battery fixing device of a new energy battery powered vehicle as claimed in claim 1, further comprising a device housing provided at an outer side of the battery fixing device, wherein a device fixing hole is provided at a lower portion of the device housing for connection with the battery pack case.

4. The battery fixing device of the new energy battery power-changing vehicle according to claim 1, wherein the fastening mechanism further comprises a fixing member, the fixing member is arranged on the inner side of the vehicle body threshold, the fixing member is provided with a through hole, the aperture of the through hole is matched with the aperture of the chassis positioning hole in the vehicle body threshold, and the first end of the first connecting member is connected with the fixing member through the chassis positioning hole to be fixed on the vehicle body threshold.

5. The battery fixing device of a new energy battery powered vehicle of claim 4, wherein the fixing member is a fixing nut.

6. The battery fixing device of a new energy battery powered vehicle of claim 5, wherein the second connector is a floating nut.

7. The battery fixing device of the new energy battery power exchanging vehicle according to claim 6, wherein the first end and the second end of the first connecting member are provided with threads, the threads of the first end of the first connecting member are matched with the internal threads of the fixing nut, and the threads of the second end of the first connecting member are matched with the internal threads of the floating nut and are detachably connected.

8. The battery fixing device of a new energy battery powered vehicle of claim 7, wherein the first connector is a stud.

9. The battery fixing device of a new energy battery powered vehicle of claim 1, wherein the resilient support is a return spring.

10. A battery fixing method of a new energy battery change vehicle, applied to the battery fixing device of the new energy battery change vehicle as claimed in any one of claims 1 to 9, characterized by comprising the steps of: