CN112498497B - Underbody and power battery box of electric vehicle - Google Patents

Abstract

The invention belongs to the technical field of electric vehicles, and discloses an electric vehicle body floor and a power battery box; the electric vehicle body floor comprises: a front cabin assembly, a front floor assembly, a rear floor assembly, and a left longitudinal beam assembly and the right longitudinal beam assembly; the front cabin assembly is fixed to the front end of the front floor assembly, the rear floor assembly is fixed to the rear end of the front floor assembly, and the left longitudinal beam assembly and the right side rail assembly are respectively fixedly connected with the front cabin assembly, the front floor assembly and the left and right side parts of the rear floor assembly; the floor part of the front floor assembly A battery box upper cover is formed, and a battery box lower box fixing structure is arranged on the front floor assembly. The vehicle body bottom plate and the power battery box of the electric vehicle provided by the invention can expand the space of the battery box, improve the space utilization rate, reduce the material cost, and realize the lightweight of the vehicle body.

Description

Body floor and power battery box of an electric vehicle

technical field

The invention relates to the technical field of electric vehicles, in particular to a body floor and a power battery box of an electric vehicle.

Background technique

In the prior art, the battery box of a pure electric vehicle is usually installed under the body floor. Above the upper cover of the battery box is the body floor, and a gap of at least 6mm should be left between the upper cover of the battery box and the body floor to avoid abnormal noise; this makes the layout space of the battery system very small, resulting in limited battery capacity, and Space utilization is low.

SUMMARY OF THE INVENTION

The invention provides a body floor and a power battery box of an electric vehicle, which solves the technical problems of small space and low utilization rate of the battery system in the prior art.

In order to solve the above technical problems, the present invention provides an electric vehicle body floor, including: a front cabin assembly, a front floor assembly, a rear floor assembly, a left longitudinal beam assembly and a right longitudinal beam assembly;

The front cabin assembly is fixed to the front end of the front floor assembly, the rear floor assembly is fixed to the rear end of the front floor assembly, the left side rail assembly and the right side rail assembly are respectively fixedly connected with the left and right sides of the front cabin assembly, the front floor assembly and the rear floor assembly;

A battery box upper cover is formed on the floor portion of the front floor assembly, and a battery box lower box fixing structure is arranged on the front floor assembly.

Further, the front floor assembly includes: a battery box upper cover, a middle channel beam, a left front floor, a right front floor, a front left panel, a front right panel, a left lower longitudinal beam, a right lower longitudinal beam, a main seat front beam, a main seat Seat rear cross member, front passenger seat cross member and front passenger seat rear cross member;

the middle channel beam, the left front floor and the right front floor are respectively fixedly connected with the front end side wall of the upper cover of the battery box and the front cabin assembly;

The front left panel and the front right panel are respectively fixed on the two side walls of the upper cover of the battery box, and the front left panel and the front right panel are respectively connected with the left longitudinal beam assembly and the The right longitudinal beam assembly is fixedly connected;

The left lower longitudinal beam and the right lower longitudinal beam are respectively fixed on the bottom of the front left side panel and the front right side panel respectively, and are respectively fixedly connected with the left front floor, the right front floor and the rear floor assembly;

The main seat front beam, the main seat rear beam, the auxiliary seat front beam and the auxiliary seat rear beam are respectively fixed on the top of the upper cover of the battery box;

Wherein, the lower box body fixing structure of the battery box is arranged on the left lower longitudinal beam and the right lower longitudinal beam.

Further, the edge of the upper cover of the battery box is provided with a sealing surface adapted to the sealing member.

Further, the top of the upper cover of the battery box is provided with a reinforcing rib structure.

Further, the upper cover of the battery box is corresponding to the front seat area, the rear footrest area and the rear seat area, and is respectively provided with a front upper cover, a middle upper cover and a rear upper cover with different heights;

The inside of the front part of the upper cover, the middle part of the upper cover and the rear part of the upper cover are formed into cell accommodating cavities with different heights.

Further, the front end of the rear floor assembly is provided with a rear left panel, a rear right panel and a front beam;

The rear left panel and the rear right panel are respectively fixed on the left and right side walls of the rear of the upper cover, and the front beam is fixed on the front side wall of the rear of the upper cover. The rear left plate and the rear right plate are respectively fixedly connected;

The front cross member is fixedly connected with the left side longitudinal beam assembly and the right side longitudinal beam assembly.

Further, the cover body of the upper cover of the battery box is an integral stamping part.

Further, the lower edge of the cover body of the upper cover of the battery box is a stepped flange surface.

Further, the fixing structure of the lower box body of the battery box is a quick-release clamping structure.

A power battery box of an electric vehicle comprises: a lower box body of the battery box and an upper cover of the battery box formed on the body bottom plate of the electric vehicle.

One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

In the body floor and power battery box of the electric vehicle provided in the embodiments of the present application, the upper cover of the battery box is directly formed into the body floor, so that an independent upper cover structure is not specially provided, thereby effectively increasing the space of the battery box. It increases the capacity of the battery cell, improves the space utilization rate, reduces the overall cost of the battery box and the underbody, and also makes the vehicle lighter. At the same time, the complexity of the disassembly and assembly operations of the battery box can also be simplified, and the disassembly and assembly efficiency can be improved.

Description of drawings

FIG. 1 is a top view of a vehicle body floor structure according to an embodiment of the present invention;

FIG. 2 is a bottom view of a vehicle body floor structure provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a body bottom plate with an upper cover of a battery box removed according to an embodiment of the present invention;

4 is a schematic structural diagram of an upper cover of a battery box provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a block structure of a body floor provided by an embodiment of the present invention;

6 is a schematic structural diagram of a front floor assembly provided by an embodiment of the present invention;

7 is a schematic structural diagram of a rear floor assembly provided by an embodiment of the present invention;

8 is a schematic structural diagram of a power battery box of an electric vehicle according to an embodiment of the present invention;

9 is a schematic structural diagram of a lower box body of a battery box provided by an embodiment of the present invention;

10 is a schematic structural diagram of an upper cover of a battery box provided by an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a battery box upper cover assembled to a vehicle body floor provided by an embodiment of the present invention;

12 is a schematic diagram of the arrangement of a circuit positive terminal and a circuit negative terminal provided by an embodiment of the present invention;

13 is a schematic diagram of the arrangement of a positive electrode connector of a battery cell and a negative electrode connector of a battery cell according to an embodiment of the present invention;

14 is a schematic diagram of an electrode coupling structure in a battery box provided by an embodiment of the present invention;

FIG. 15 is a schematic diagram of an arrangement structure of a sealing member provided by an embodiment of the present invention.

Detailed ways

The embodiments of the present application solve the technical problems of small space and low utilization rate of the battery system in the prior art by providing a body floor and a power battery box for an electric vehicle.

In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the accompanying drawings and specific embodiments of the description. , rather than limiting the technical solutions of the present application, the embodiments of the present application and the technical features in the embodiments may be combined with each other under the condition of no conflict.

Referring to FIG. 1 , a body floor of an electric vehicle includes: a front cabin assembly 1 , a front floor assembly 2 , a rear floor assembly 3 , a left longitudinal beam assembly 4 and a right longitudinal beam assembly 5 .

The front cabin assembly 1 is fixed to the front end of the front floor assembly 2, the rear floor assembly 3 is fixed to the rear end of the front floor assembly 2, the left side rail assembly 4 and the The right side rail assembly 5 is respectively fixedly connected with the left and right sides of the front cabin assembly 1 , the front floor assembly 2 and the rear floor assembly 3 , forming a complete vehicle body floor assembly.

Referring to FIG. 2 , in this embodiment, a battery box upper cover 6 is formed on the floor portion of the front floor assembly 2 , that is, the battery box is directly formed from the floor portion of the front floor assembly 2 The upper cover 6, as a part of the battery box, does not need to be specially provided with an upper cover structure as in the conventional design in the prior art, and also does not need to leave enough clearance space for this purpose to reduce abnormal noise and set aside an independent circuit Connector space, etc.; thereby greatly expanding the available space of the battery box system to accommodate larger cell structures, increase battery capacity, and improve space utilization.

At the same time, the material of the special upper cover structure can be saved, which can reduce the cost and realize the lightweight of the body.

The front floor assembly 2 is provided with a battery box lower box fixing structure, so that the battery lower box can be fixed.

2 , 3 , 4 , 5 and 6 , the front floor assembly 2 includes: a battery box upper cover 6 , a middle channel beam 22 , a left front floor 23 , a right front floor 24 , a front left side plate 25 , a front Right side panel 26 , left lower side member 221 , right lower side member 222 , main seat front cross member 201 , main seat rear cross member 203 , auxiliary seat front cross member 202 , and auxiliary seat rear cross member 204 .

The middle channel beam 22 , the left front floor 23 and the right front floor 24 are respectively fixedly connected to the front end side wall of the upper cover 6 of the battery box and the front cabin assembly 1 .

The front left side panel 25 and the front right side panel 26 are respectively fixed on the two side walls of the upper cover 6 of the battery box, and the front left side panel 25 and the front right side panel 26 are respectively connected to the left side rail. The assembly 4 and the right side rail assembly 5 are fixedly connected, so as to strengthen the upper cover 6 of the battery box.

The left lower longitudinal beam 221 and the right lower longitudinal beam 222 are respectively fixed on the bottom of the front left side panel 25 and the front right side panel 26 and are respectively combined with the left front floor 23 , the right front floor 24 and the rear floor. 3 fixed connections are made to strengthen the upper cover 6 of the battery box.

The main seat front beam 201, the main seat rear beam 203, the auxiliary seat front beam 202 and the auxiliary seat rear beam 204 are respectively fixed on the top of the battery box upper cover 6, thereby strengthening the The battery box has an upper cover 6 .

Wherein, the lower box fixing structure of the battery box is arranged on the left lower longitudinal beam 221 and the right lower longitudinal beam 222 .

In this embodiment, the edge of the upper cover 6 of the battery box is provided with a sealing surface adapted to the sealing member, so as to improve the sealing performance. In order to further improve the sealing performance, the lower edge of the cover body of the upper cover 6 of the battery box is a stepped flange surface, forming a double-channel sealing structure.

In order to further strengthen the cover, the top of the upper cover 6 of the battery box is provided with a reinforcing rib structure.

Referring to FIG. 4 , the upper cover 6 of the battery box is corresponding to the front seat area, the rear footrest area and the rear seat area, and is respectively provided with a front upper cover, a middle upper cover and a rear upper cover with different heights; the The front part of the upper cover, the middle part of the upper cover and the rear part of the upper cover are provided with cell accommodating cavities with different heights, so as to maximize the utilization of the vehicle space and increase the volume of the cell accommodating space.

3, 5 and 7, the front end of the rear floor assembly 3 is provided with a rear left panel 31, a rear right panel 32 and a front cross member 33; the rear left panel 31 and the rear right panel 32 are respectively The front cross beam 33 is fixed on the left and right side walls of the rear of the upper cover. The front cross beam 33 is also fixed on the front side wall of the rear of the upper cover. The right side plates 32 are respectively fixedly connected; the front cross beam 33 is fixedly connected with the left side rail assembly 4 and the right side rail assembly 5 .

In order to improve the structural strength, the cover body of the upper cover 6 of the battery box is an integral stamping part.

Further, the fixing structure of the lower box body of the battery box is a quick-release clamping structure.

This embodiment also proposes a power battery box for an electric vehicle, including: a lower box body of the battery box and an upper cover of the battery box formed on the body floor of the electric vehicle.

In the body floor and power battery box of the electric vehicle provided in the embodiments of the present application, the upper cover of the battery box is directly formed into the body floor, so that an independent upper cover structure is not specially provided, thereby effectively increasing the space of the battery box. Increasing the capacity of the battery cell also reduces the overall cost of the battery box and the underbody, and also makes the vehicle lighter. At the same time, the complexity of the disassembly and assembly operations of the battery box can also be simplified, and the disassembly and assembly efficiency can be improved.

This embodiment also proposes a battery box structure based on the above-mentioned battery box upper cover 6 .

8 and 11 , a power battery box for an electric vehicle includes: a lower battery box 7 and a battery box upper cover 6 formed on the vehicle body floor; that is, the battery box upper cover 6 is directly used The body floor part of the body floor assembly is formed, and the battery box upper cover 6 is integrated with the body floor, and the battery box lower box 7 is hoisted on the body floor assembly; thus, the independent battery in the prior art can be omitted. The upper cover structure of the box, the movable electrical connector and the auxiliary structure of the upper cover, etc., make the body lightweight, reduce the cost and improve the space utilization rate. The disassembly and assembly operations are also limited to the lower box 7 of the battery box, which simplifies the operation process and improves the operation efficiency. At the same time, during charging, it can also ensure that the lower box body 2 of the battery box is open and ventilated, so as to avoid heat accumulation and improve safety. There is also no need to replace the upper cover structure, thereby reducing costs.

9 , 13 and 14 , the lower case 7 of the battery box includes: a lower case, a battery cell 79 , a battery cell positive terminal 74 , a battery negative terminal 75 , a lower bracket 77 , a hoisting fastener and a seal Piece 8.

The battery cell 79 is fixed in the lower box, the battery cell positive terminal 74 and the battery negative terminal 75 are fixed on the lower box through the lower bracket 77 , and the battery positive terminal 74 and the negative terminal 75 of the battery are connected to the battery 79 to form a normal solidified electrical connection structure of the battery 79, which is convenient for electrical connection and coupling during disassembly and assembly, and avoids excessive operation.

10 , 12 and 14 , the upper cover 6 of the battery box includes: a cover body, a power supply circuit, a circuit positive terminal 62 , a circuit negative terminal 63 and an upper bracket 65 .

The cover body is formed by forming the body floor, generally it can be stamped and formed as a whole, and then welded to the body floor assembly.

The power supply circuit is fixed on the cover body, the circuit positive terminal 62 and the circuit negative terminal 63 are fixed on the cover through the upper bracket 65, and the circuit positive terminal 62 and the circuit The negative terminals 63 are respectively connected with the power supply circuit; and the external cable passing window 61 is opened on the cover body for accommodating external cables, so as to realize the normal solidification of the electrical connection structure of the upper cover 6 of the battery box, and does not need to follow the disassembly and assembly. It can be disassembled during the process, which reduces the complexity of the disassembly process and improves the stability and reliability of the electrical connection.

It is worth noting that, since the circuit positive terminal 62 and the circuit negative terminal 63 are stably fixed on the cover body through the upper bracket 65, the battery positive terminal 64 and the battery negative terminal 25 pass through the lower bracket 65. The bracket 27 is stably fixed on the lower box. Therefore, during the disassembly and assembly process, only the joints follow the disassembly and assembly process to perform decoupling and coupling operations, and the whole process is convenient, simple, efficient and reliable.

Wherein, the hoisting fasteners are arranged on the lower box body and are used for hoisting to the underbody assembly. In this embodiment, the hoisting fasteners are composed of two sets of quick-release clips arranged on the lower box. Each set of quick-release clips includes: a first quick-release clip 71, a second quick-release clip Of course, there may be four or other numbers of the clips 72 and the third quick-release clips 73, which are not limited here; correspondingly, matching slots and holes are provided on the underbody assembly.

Referring to FIG. 10 and FIG. 15 , the sealing member 8 is fixed on the edge of the lower case body, and when the cover body is fastened on the lower case body, the joint gap is sealed by the sealing member 8 .

In this embodiment, the sealing member 8 is provided with a snap-inserting groove, which is used to be embedded on the edge of the inner stop 78 of the lower box; the sealing member 8 is also provided with a top hollow foam part. 81, used for elastically abutting on the side wall of the lower edge of the cover body; the sealing member 8 is also provided with a sealing ring body matching the table surface of the lower box body, and elastically squeezes and seals the lower edge of the cover body A gap is sealed between the plane 64 and the box opening table of the lower box body.

In order to further improve the contact sealing performance, a serrated sealing line 82 is also provided on the sealing ring body.

Referring to FIG. 14 , the lower bracket 77 is provided with a first elastic base 76 ; Thereby, the battery positive terminal 74 and the battery negative terminal 75 can be subjected to a certain degree of elastic pressure, so that the battery positive terminal 74 and the battery negative terminal 75 can have a certain degree of compression. , to ensure the coupling stability between the joints.

In order to suppress the induced current, the first elastic base 76 is a first insulating material base, and a first rubber block can be used. The lower part of the first rubber block is provided with a first clamping part, and the first clamping part is embedded in the lower bracket 77; the top of the first rubber block is provided with a first electrode fixing boss, and the battery positive terminal 74 and the battery negative terminal 75 are respectively fixed on the first electrode fixed On the boss, the positive electrode connector 74 of the battery cell and the negative electrode connector 75 of the battery cell have independent free offset spaces to achieve stable fixation.

At the same time, the side wall of the first rubber block can also be opened into a zigzag-like structure surface, so that a certain controllable regular deformation can be generated, so that even if there is no certain deviation of the joint pair, the joint pair can be naturally coupled in place.

Similarly, the upper bracket 65 is provided with a second elastic base 66 ; the circuit positive terminal 62 and the circuit negative terminal 63 are respectively fixed on the second elastic base 66 . The second elastic base 66 is a second insulating material base, and the second insulating material base can be configured as a second rubber block.

Further, the top of the second rubber block is provided with a second clamping part, and the second clamping part is embedded in the upper bracket 65; the bottom of the second rubber block is provided with a second electrode fixing boss , the circuit positive terminal and the circuit negative terminal are respectively fixed on the second electrode fixing boss.

One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

In the power battery box of the electric vehicle provided in the embodiment of the present application, the body floor is directly formed into the upper cover of the battery box as a part of the body floor, so that the external electrical connection structure of the battery box is normally solidified, without setting the conventional solution. The complex movable joint does not need to operate the existing electrical connection structure such as the cable of the battery box during disassembly and assembly, which improves the operation efficiency; at the same time, the electrodes corresponding to the cells of the lower box and the power supply electrodes of the upper cover are located at the bottom. The normally solidified positive terminal of the cell, the negative terminal of the cell and the positive terminal of the circuit and the negative terminal of the circuit in the box body and the upper cover realize convenient electrical coupling connection; that is, when the lower box is fixed to the body floor by the hoisting The coupling connection of the joint is realized synchronously, which improves the reliability and stability of the electrical connection; that is, in the whole process, the electrical connection structure is not required to be operated, and only the simple lifting and disassembly of the lower box can be carried out, which greatly improves the operation efficiency and Electrical connection reliability. On the other hand, since the upper cover is fused to the body floor, the gap between the conventional upper cover and the body floor is avoided, and the space of the upper cover itself can accommodate a larger cell volume or under the condition of the same cell volume Reduce space occupation, improve space utilization, reduce costs, and lighten the body. At the same time, only the lower box needs to be operated during disassembly and charging, which is lower in cost and higher in safety.

Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (6)

1. A body floor of an electric vehicle, comprising: a front cabin assembly, a front floor assembly, a rear floor assembly, a left longitudinal beam assembly and a right longitudinal beam assembly; The front cabin assembly is fixed to the front end of the front floor assembly, the rear floor assembly is fixed to the rear end of the front floor assembly, the left side rail assembly and the right side rail assembly are respectively fixedly connected with the left and right sides of the front cabin assembly, the front floor assembly and the rear floor assembly; A battery box upper cover is formed on the floor portion of the front floor assembly, and the battery box upper cover is integrated with the vehicle body bottom plate. The front floor assembly is provided with a battery box lower box fixing structure. The fixing structure of the lower box of the battery box is a quick-release clamping structure; the electrical connection structure of the upper cover of the battery box is normally solidified, and does not need to be disassembled with the disassembly process; the disassembly operation is limited to the lower box of the battery box; The front floor assembly includes: battery box upper cover, middle channel beam, left front floor, right front floor, front left panel, front right panel, left lower longitudinal beam, right lower longitudinal beam, main seat front cross beam, main seat rear Cross member, front cross member of passenger seat and rear cross member of passenger seat; the middle channel beam, the left front floor and the right front floor are respectively fixedly connected with the front end side wall of the upper cover of the battery box and the front cabin assembly; The front left panel and the front right panel are respectively fixed on the two side walls of the upper cover of the battery box, and the front left panel and the front right panel are respectively connected with the left longitudinal beam assembly and the The right longitudinal beam assembly is fixedly connected; The left lower longitudinal beam and the right lower longitudinal beam are respectively fixed on the bottom of the front left side panel and the front right side panel respectively, and are respectively fixedly connected with the left front floor, the right front floor and the rear floor assembly; The main seat front beam, the main seat rear beam, the auxiliary seat front beam and the auxiliary seat rear beam are respectively fixed on the top of the upper cover of the battery box; Wherein, the lower box body fixing structure of the battery box is arranged on the left lower longitudinal beam and the right lower longitudinal beam; The upper cover of the battery box is corresponding to the front seat area, the rear footrest area and the rear seat area, and is respectively provided with a front upper cover, a middle upper cover and a rear upper cover with different heights; The inside of the front part of the upper cover, the middle part of the upper cover and the rear part of the upper cover are formed into cell accommodating cavities with different heights; The front end of the rear floor assembly is provided with a rear left panel, a rear right panel and a front beam; The rear left panel and the rear right panel are respectively fixed on the left and right side walls of the rear of the upper cover, and the front beam is fixed on the front side wall of the rear of the upper cover. The rear left plate and the rear right plate are respectively fixedly connected; The front cross member is fixedly connected with the left side longitudinal beam assembly and the right side longitudinal beam assembly. 2 . The underbody of an electric vehicle according to claim 1 , wherein the edge of the upper cover of the battery box is provided with a sealing surface adapted to a sealing member. 3 . 3 . The body floor of the electric vehicle according to claim 1 , wherein a reinforcing rib structure is provided on the top of the upper cover of the battery box. 4 . 4 . The body bottom plate of an electric vehicle according to claim 1 , wherein the cover body of the upper cover of the battery box is an integral stamping part. 5 . 5 . The body floor of an electric vehicle according to claim 1 , wherein the lower edge of the cover body of the upper cover of the battery box is a stepped flange surface. 6 . 6 . A power battery box for an electric vehicle, comprising: a lower box body of the battery box and an upper cover of the battery box formed on the underbody of the electric vehicle according to claim 1 .

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