CN112848961A

CN112848961A - Locking system method for quick-change battery of electric vehicle

Info

Publication number: CN112848961A
Application number: CN202010913097.0A
Authority: CN
Inventors: 王建民; 欧海鸥; 欧国
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-11
Filing date: 2020-09-02
Publication date: 2021-05-28
Also published as: CN112829628A

Abstract

The battery of the electric automobile is quickly replaced, inconvenience caused by charging of the electric automobile to a user can be solved, and reliability and low cost are the basic of battery replacement development. The invention provides a method and a system for locking an electric automobile battery replacement through an eccentric wheel rotating shaft, which can complete the installation and locking of the battery replacement through an own power system of the electric automobile, greatly improve the speed and the connection reliability of the battery replacement, improve the locking strength, provide a control method capable of carrying out position and locking force on the locking process, monitor the locking state even in the driving process and carry out secondary locking. Meanwhile, the battery replacing equipment of the battery replacing station can be simplified, and the battery replacing cost is reduced.

Description

Locking system method for quick-change battery of electric vehicle

Technical Field

The invention relates to the field of battery replacement of electric automobiles, in particular to a battery replacement electric automobile and a battery replacement battery.

Background

The battery replacement of the electric automobile can solve a plurality of problems troubling the development of the electric automobile, and a plurality of electric automobile manufacturers make a plurality of efforts and attempts, so that the electric automobile is fixed by using the traditional bolt, and although the electric automobile is guaranteed, the equipment is complex and the investment cost is high; the other is that the battery is installed through limit locking, the cost is low, but the reliability is poor, the mutual interference of the position size error locking of the limit points cannot provide the clamping force required by tight and reliable connection. The invention changes the relative position and the connecting force of two mutually connected parts through the transmission of the eccentric wheel shaft, is used for the connection between two plates, has no mutual size interference between the connections at different positions, has high efficiency, can provide the connection strength required by tight connection, controls the reliability of the locking process according to the set parameters, can monitor the locking state at any time even in the running process, and carries out secondary locking.

Disclosure of Invention

Setting a direction, which is the direction of a pressing force required to be applied when the battery pack is connected with the battery mounting fixing frame, wherein the pressing force is respectively applied to the battery mounting fixing frame and the eccentric wheel rotating shaft of the battery pack bearing connecting plate through the contact of the eccentric wheel and the rotating shaft, and the relative position of the battery mounting fixing frame and the battery pack is changed in the set direction, so that the locking connection requirement of pressing connection or releasing can be realized, and the contact actions respectively comprise two combinations: the eccentric wheel acts on the battery mounting fixing frame, the rotating shaft acts on the battery pack bearing connecting plate or the eccentric wheel acts on the battery pack bearing connecting plate, and the rotating shaft acts on the battery mounting fixing frame. The eccentric wheel and the rotating shaft of the eccentric wheel rotating shaft can act on the battery fixing mounting frame or the battery pack bearing connecting plate through the intermediate connecting piece. The contact action surface of the eccentric wheel comprises one or a combination of a plurality of the following circular curved surface, Archimedes spiral curved surface, logarithmic curved surface and plane. The intermediate connection includes and is not limited to a combination of one or more of a rotating ring, a connecting rod, a bolt, and a limiting plate. The battery pack bearing connecting plate is a battery pack connecting bearing part connected with the battery mounting fixing frame.

Furthermore, a threshold value of a rotation angle of the eccentric wheel rotating shaft relative to the battery mounting fixing frame and a threshold value of a rotation torque moment are set, and the threshold values can be one value or two values. And according to the combination of one or more values, the control basis of the completion or the abnormity of the locking process is taken. Furthermore, when the electric automobile runs, detection and secondary locking are continuously carried out according to a set threshold value.

A locking system for a quick-change battery of an electric vehicle.

The application system comprises:

a. the battery mounting fixing frame is arranged on the automobile chassis and provided with a bearing connecting plate, and the bearing connecting plate can be a part of a certain structural part;

b. arranging the eccentric wheel rotating shaft;

c. the battery pack is provided with the battery pack bearing connecting plate;

d. one end of the middle connecting piece is connected with a rotating shaft or an eccentric wheel through a rotating ring structure, and the other end of the middle connecting piece is connected with the battery pack bearing connecting plate through a limiting structure.

The rotation of the eccentric wheel rotating shaft changes the relative positions of the battery mounting fixing frame and the battery pack bearing connecting plate which respectively act on the eccentric wheel and the rotating shaft, and the mounting and locking requirements of connection and separation are met.

The middle connecting piece comprises an assembly, one end of the middle connecting piece is connected with the eccentric wheel rotating shaft or the eccentric wheel through a rotating ring structure, the other end of the middle connecting piece is provided with a limiting structure and can be connected with the battery pack bearing connecting plate, and the limiting structure comprises one or more of a circular truncated cone, a boss, a bolt, a nut, a check ring and a shaft pin. The curved surface of the eccentric wheel rotating shaft comprises one or more of the following combinations, a circular curved surface, an Archimedes spiral curved surface, a logarithmic curved surface and a plane. And a rotating spring is arranged on the rotating shaft of the eccentric wheel, one end of the rotating spring acts on the battery mounting fixing frame, the other end of the rotating spring acts on the intermediate connecting piece, and the spring pushes the intermediate connecting piece to rotate towards one direction. The rotating swivel structure part of the intermediate connecting piece is provided with a driving structure part which is associated with the angle position of the connecting rod, wherein the driving structure part comprises a push pin and a ring groove and is not limited to the push pin and the ring groove and is used for being associated with the eccentric rotating shaft. And a wear-resistant metal sheet is arranged between the contact action positions of the mounting fixing frame and the eccentric wheel rotating shaft, so that the requirements on deformation resistance and wear resistance of materials at the corresponding positions of the battery mounting fixing frame are reduced. The force bearing plate of the battery pack is provided with a transverse opening connecting groove port 170, and the transverse connecting groove ports corresponding to the middle connecting pieces are linearly distributed and used for integrally moving in or swinging in the connecting pieces.

Drawings

The structural proportion relation in the drawings is exemplary and only functional understanding can not reflect actual size and proportion relation, and the upper, lower, left, right, front, rear and the like of the relative positions are only partially exemplary marks and are not limited.

Fig. 1 is a system configuration diagram.

Fig. 2 is a schematic diagram of the operation.

Fig. 3 is a working schematic diagram of a curved surface curve of the eccentric wheel.

Example 1

Setting threshold values M1 and M2(> M1) for providing the rotation torque M of the eccentric wheel rotating shaft; in fig. 2(c), an included angle ω (fig. 2 c) between the acting force direction and the short axis direction of the eccentric wheel is provided with threshold values Φ 1 and Φ 2(> Φ 1) of an included angle, wherein Φ 1 is used for ensuring that the acting point of the eccentric wheel is in the locking range of the friction angle, and M2 and Φ 2 is an abnormal rotation angle range; .

Control is performed according to the above settings:

the prompting and control of system abnormity of a.m > M2 or omega > phi 2 … can occur in serious deformation, breakage and the like of a fastener; the foreign body is stuck and the like.

b.m > M1 and omega > phi 1 … complete the prompt and control of normal lock-up.

The above control is not only applicable to the battery mounting locking process, but more importantly, in the case where the locking drive is from the electric vehicle, the control can be performed throughout the running of the electric vehicle. The defect that the battery is quickly replaced at present and is locked for 2 times in the running process of the electric automobile can be overcome. The eccentric shaft 115 of fig. 1 is driven by a sprocket 140 mounted at the shaft end, which is driven by a motor (not shown) through a chain, and the sprocket 140 is driven by the motor even during the running of the electric vehicle, and is continuously locked.

Example 2

Fig. 3 is a radial cross-sectional curve of an eccentric, which is composed of various curves and straight lines.

1. And when the circular curve is used as a working surface, the locking state is not changed when the rotating shaft rotates, and only the rotating position of the middle connecting piece is changed, so that the middle connecting piece is rotated into and out of the battery bearing connecting plate.

2. And the Archimedes spiral II is used as a working surface, and the rotating shaft can rotate to change the distance and the gap between the battery mounting fixing frame and the battery pack.

3. Logarithmic curve III, at the logarithmic curve working face, there is a fixed contained angle in the ditch county and working face, sets this contained angle in the within range of friction angle, and the rotation of axis of rotation that can point avoids connecting not hard up.

4. Straight line iv, transition line between two different curves.

Example 3

Fig. 1 is a part of an electric vehicle mounting lock device. The battery mounting bracket comprises a battery mounting fixing frame 105 which is composed of square pipes with a better bending-resistant structure, a battery mounting bracket square pipe bottom plate is used as a bearing connecting plate, an eccentric wheel 110 of an eccentric wheel rotating shaft 115 acts on the bearing connecting plate through a wear-resistant base plate 150, a chain wheel 140 drives the eccentric wheel rotating shaft to rotate, and the limiting groove 135 and a limiting bearing 130 limit the left and right transverse movement of the rotating shaft.

The limiting groove 135 is used for limiting the rotation shaft of the eccentric wheel in one direction and keeping flexible movement in the other direction.

The limit in fig. 1 is a limit formed by a limit groove 135 and two bearings 130, the limit groove is an asymmetric structural member, and is in contact with the left side and the right side of one bearing, and is in contact with the right side and the left side of the other bearing, and the eccentric wheel rotating shaft is limited in the left-right direction and cannot move, but is not limited in the up-down direction and can move flexibly.

Another limitation in fig. 1 is that the outer diameter of the limitation bearing 130 and the lateral width of the limitation groove 135 have a gap, the left and right sides cannot be contacted at the same time, and the rotation shaft can be flexibly moved up and down while being limited by the limitation groove.

In fig. 2, the intermediate connector 120 having a rotary ring mounted on the rotary shaft passes through a through hole of the bottom plate of the battery mount square tube, and the limit stopper 155 is fixed at the other end by a fixing bolt 160.

A rotating ring part of the intermediate connecting piece 120 is provided with a rotating ring limit stop pin 165 at one side close to the connecting rod direction, and a rotating push pin 145 which interacts with the rotating ring limit stop pin 165 is arranged at the radial position corresponding to the eccentric wheel short shaft of the eccentric wheel rotating shaft 115 corresponding to the rotating ring limit stop pin 165. In fig. 2 (a), the rotating shaft 115 can push the middle connector 120 to rotate through the rotating push pin 145 and the rotating ring limit stop pin 165, and the return spring 125 arranged on the rotating shaft 115 acts on the middle connector 120 and the battery mounting fixing frame 105 respectively to push the baffle 155 of the middle connector towards the battery pack 100.

When the battery pack is separated (fig. 2 a), the short axis direction of the eccentric wheel 110 is downward, the baffle plate 155 of the middle connecting piece 120 is in a state of being far away from the battery pack mounting fixing frame 105 and is pushed to the outer side (fig. 2 a) away from the battery end by the rotating push pin 145 and the rotating ring limiting baffle pin 165 on the eccentric wheel rotating shaft 115, at the moment, the battery pack can freely move up and down without being influenced by the middle connecting piece 120, when the battery is mounted in the battery mounting fixing frame 105, the eccentric wheel rotating shaft 115 rotates anticlockwise, the middle connecting piece 120 is pushed into the opening mounting groove of the battery pack bearing connecting plate 101 (see fig. 2 b) by the return spring 125, and the limiting baffle plate 155 of the middle connecting piece 120 is cut into the; the eccentric wheel rotating shaft 115 continues to rotate counterclockwise, the radius of the acting point of the eccentric wheel 110 acting on the square tube bottom plate of the battery mounting fixing frame 105 is increased, the eccentric wheel rotating shaft 115 is lifted, the baffle 155 of the middle connecting piece 120 is lifted through the swivel ring until acting on the battery pack bearing connecting plate 101 and being locked on the bottom plate of the battery mounting fixing frame 105, and when the rotating angle and the torque moment of the eccentric wheel rotating shaft meet the set requirements, the mounting and locking process of the battery pack is completed (fig. 2 b).

Even during the running of the electric vehicle, the locking control system periodically detects the locking angle and the torque of the eccentric rotating shaft 115, and when the locking angle and the torque fall below the set parameters, the locking system starts the procedure of the foregoing embodiment 1 again.

The installation locking only acts on the two connecting plates which are in direct contact through the eccentric wheel rotating shaft, the specific connection strength is only related to the combined thickness of the two connecting plates, the connection strength is not related to the position and size of other battery installation fixing frames and battery packs, the position and size interference is avoided, even if the thickness of the two connected plates has a certain range of error, the two connected plates can be reliably and tightly connected, and the connection reliability of the system is greatly improved.

When the battery pack needs to be separated, the battery pack can be lifted up through a lifting device or a battery replacement device of the electric automobile, the eccentric wheel rotating shaft 115 rotates clockwise to the short shaft end of the eccentric wheel 110 to act on the bottom plate of the battery pack mounting fixing frame 105, the baffle plate 155 of the middle connecting piece 120 leaves the battery pack connecting bearing plate 101, the eccentric wheel rotating shaft 115 rotates clockwise continuously, the rotating push pin 145 pushes the middle connecting piece 120 to swing clockwise to the outer side (shown in figure 2 a) leaving the battery end together through the swivel limiting pin 165 of the middle connecting piece 120, the battery pack leaves the battery pack mounting fixing frame along with the lifting device or the battery replacement device, and the separation of the battery pack and the electric automobile is.

Conditional language, such as, inter alia, "can," "might," "perhaps," "e.g.," as used herein, is generally intended to convey that certain embodiments include, but other embodiments do not include, certain features, elements, and/or states unless specifically stated otherwise, or otherwise understood in the context of the usage. Thus, such conditional language is not generally intended to imply that features, elements, and/or states are in any way required for one or more embodiments or that one or more embodiments necessarily include logic for deciding, whether or not an author inputs or prompts, whether or not such features, elements, and/or states are included or are to be performed in any particular embodiment.

Further, the following terminology may be used herein. The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, a reference to an item includes a reference to one or more items. The terms "a" and "an" refer to one, two or more and apply generally to the selection of some or all of the amounts. The term "plurality" refers to two or more of the items. The term "substantially" means that the recited feature, parameter, or value need not be achieved exactly, but may be subject to deviations or variations, including, for example, tolerances, measurement error, measurement accuracy limitations, and other factors known to those skilled in the art. May be present in an amount that does not interfere with the effect that the feature is intended to provide.

While exemplary embodiments are described above, it is not intended that these embodiments describe all possible forms encompassed by the claims. The words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the disclosure. As previously noted, features of the various embodiments may be combined to form other exemplary aspects of the disclosure that may not be explicitly described or illustrated. While various embodiments may have been described as providing advantages or being preferred over other embodiments or over prior art implementations with respect to one or more desired characteristics, those of ordinary skill in the art will recognize that one or more features or characteristics may be compromised to achieve desired overall system attributes, which depend on the particular application and implementation. These attributes may include, but are not limited to, cost, strength, durability, life cycle cost, marketability, appearance, packaging, size, suitability, weight, manufacturability, ease of assembly, and the like. Accordingly, embodiments described as less desirable than other embodiments or prior art implementations with respect to one or more features are not outside the scope of the present disclosure and may be desirable for particular applications.

Claims

1. A locking method for a quick-change battery of an electric vehicle is characterized in that an eccentric wheel and a rotating shaft of the eccentric wheel act on (including through an intermediate connecting piece) a battery mounting fixing frame bearing connecting plate and a battery pack bearing connecting plate of an electric vehicle chassis respectively, and the connection and the separation of the battery mounting fixing frame and the battery bearing connecting plate are realized through the rotation of the rotating shaft of the eccentric wheel;

the eccentric wheel on the eccentric wheel rotating shaft comprises one or a combination of a plurality of curved surfaces, namely a circular curved surface, an Archimedes spiral curved surface, a logarithmic curved surface and a plane;

the battery pack bearing connecting plate is a battery pack bearing connecting part connected with the battery mounting fixing frame;

the bearing connecting plate of the battery mounting fixing frame can be a part of a structural member and is used for being connected with the bearing connecting plate of the battery pack.

2. A locking method according to claim 1, wherein a threshold value for the angle of rotation of the eccentric shaft relative to the battery mount is provided, and a threshold value for the torque is provided, either alone or in combination, for control.

3. A locking method according to claim 1, 2, characterized in that the electric vehicle is driven, and secondary locking is performed according to a set threshold value.

4. The latch system of claim 1, including a battery mounting bracket, wherein,

a. the eccentric wheel rotating shaft is also included;

b. the battery pack is provided with the battery pack bearing connecting plate;

c. the middle connecting piece is a connecting rod structure component, one end of the middle connecting piece is connected with a rotating shaft of the eccentric wheel rotating shaft or the eccentric wheel through a rotating ring structure, and the other end of the middle connecting piece acts on the battery pack bearing connecting plate through a limiting structure.

5. The latching system of claim 4, wherein said intermediate connector comprises a component having a rotatable ring structure at one end and a stop structure at the other end, including and not limited to one or more of a boss, a bolt, a nut, a retainer, and a pin.

6. The latch system of claim 5 wherein the swivel structure portion of the intermediate link member is provided with drive structure associated with the angular position of the linkage member including and not limited to one of a push pin, a ring groove, and a boss.

7. A locking system according to claim 4, wherein the eccentric curvature of the eccentric shaft comprises one or more of a circular curvature, an Archimedes spiral curvature, a logarithmic curvature, and a flat surface.

8. The lock-up system of claim 4, wherein the eccentric rotation shaft is provided with a spring for urging the intermediate link member to rotate back.

9. A locking system as claimed in claim 4, wherein a wear-resistant metal plate is provided between the positions of contact of said mounting bracket with said eccentric rotation shaft.

10. The latching system of claim 4 wherein said battery pack support plate has laterally open connecting notches, said notches being linearly aligned with each of said eccentric rotation axis transverse connecting notches.