CN206076303U - Electric automobile chassis device - Google Patents

Abstract

An electric vehicle chassis device, comprising an upper cover plate, a honeycomb housing structure, a lower guard plate, a bus circuit board, and a battery assembly; the bus circuit board includes a positive bus layer and a negative bus layer located on the positive bus layer and insulated from the positive bus layer The bus circuit board is set on the lower guard plate, the honeycomb housing structure is set on the negative electrode bus layer, and the upper cover plate is set on the honeycomb housing structure; the honeycomb housing structure includes a plurality of hollow honeycomb units, and the battery assembly includes a plurality of single cells , a base and an electrical connector; each base has a through hole, each base is accommodated in a corresponding honeycomb unit and is set outside a corresponding single battery, and each electrical connector is arranged on a corresponding Inside a base; the negative terminal of each single battery is facing the upper cover plate, and the positive terminal of each single battery is electrically connected to the through hole of the base corresponding to the through hole of the base; each electrical connector is electrically connected Corresponding to the casing and negative electrode bus layer of a single battery.

Description

Electric Vehicle Chassis Unit

【Technical field】

The utility model relates to the technical field of electric vehicles, in particular to an electric vehicle chassis device.

【Background technique】

Under the pressure of energy crisis and environmental pollution, safety, environmental protection, and energy saving have become the themes of today's automobile development. Electric vehicles have been highly valued and supported by transportation and energy departments because of their advantages in energy saving, environmental protection, and pollution-free. In recent years, The new energy automobile industry ushered in explosive growth. Batteries are the core of electric vehicles. Under the bottleneck of the existing battery technology level, the fusion and re-integration design of the car chassis and battery pack is the key technology to improve the energy density of the whole vehicle in the future. The honeycomb structure battery chassis removes the traditional battery box design, and the battery is directly fixed in the honeycomb core, which puts forward higher requirements for the battery circuit design. The traditional electric vehicle chassis is mainly connected by bolts and welded to install the battery cells. The copper nuts of the positive pole of the battery and the copper bolts of the negative pole of the battery are connected to each other and fixed on the copper plate for confluence. The internal monitoring circuit and the modules are connected by wires. Confluence design, high requirements on welding level and bolt surface quality, many battery lines, complex wiring, bolts are easy to fall off during long-term operation, poor line reliability, complicated line installation, inconvenient maintenance, heavy copper bolts and copper plate confluence, It is not conducive to the lightweight of the whole vehicle.

【Content of utility model】

The purpose of the utility model is to provide an electric vehicle chassis device that is "wireless", easy to install, easy to maintain, not easy to fall off in long-term operation, high in reliability and light in weight.

In order to achieve the above object, the utility model provides an electric vehicle chassis device, which includes an upper cover plate, a honeycomb housing structure, a lower guard plate, a confluence circuit board, and a battery assembly; the confluence circuit board includes a positive confluence layer and a The upper and negative electrode bus layer is insulated from the positive electrode bus layer; the bus circuit board is arranged on the lower guard plate, the honeycomb housing structure is arranged on the negative electrode bus layer, and the upper cover plate is arranged on the honeycomb On the housing structure: the honeycomb housing structure includes a plurality of hollow honeycomb units, the battery assembly includes a plurality of single cells, bases corresponding to the number of single cells, and electrical connectors corresponding to the number of single cells; Each single battery includes a positive terminal and a negative terminal opposite to the positive terminal, and each single battery is accommodated in a corresponding honeycomb unit; each base has a through hole, and each base is accommodated in a corresponding In a honeycomb unit and set outside a corresponding single battery, each electrical connector is arranged in a corresponding base; the negative end of each single battery faces the upper cover plate, and the negative end of each single battery The through hole of the positive terminal corresponding to the through hole of the base is electrically connected to the positive electrode bus layer; each electrical connector is electrically connected to the casing corresponding to a single battery and the negative electrode bus layer.

In a preferred embodiment, the negative electrode bus layer is provided with a plurality of via holes, each via hole corresponds to a corresponding honeycomb unit and each via hole has an elastic conductive member; the positive terminal has a protruding contact portion , the contact part passes through the through hole of the corresponding base and abuts against the corresponding one of the elastic conductive members.

In a preferred embodiment, the elastic conductive member includes a top contact piece, a spring disposed under the top contact piece, and a bottom contact piece; one end of the spring is connected to the top contact piece, and the other end is connected to the bottom contact piece, The bottom contact sheet is further electrically connected to the positive bus layer; the contact portion is abutted against the top contact sheet; and the bus circuit board is provided with positioning holes corresponding to the positioning posts.

In a preferred embodiment, the shell of the single battery is provided with a circular groove; the electrical connection includes an arc-shaped clamping portion and a plurality of evenly spaced electrical connections extending from one side of the clamping portion. Each electrical contact pin protrudes to form a protruding contact; the clamping part is clamped outside the shell of a corresponding single battery and is in electrical contact with the shell, and the protruding contact is located in the groove of the shell and make electrical contact with the case.

In a preferred embodiment, the electrical connector further includes positioning posts, and the bus circuit board is provided with positioning holes corresponding to the positioning posts.

In a preferred embodiment, one end of each base extends toward the center of the through hole to form an inner edge; the clamping portion abuts against the inner edge of the base.

In a preferred embodiment, the bus circuit board includes a plurality of sub-circuit boards; the single batteries on each sub-circuit board are connected in parallel with each other, and the sub-circuit boards are further connected in series.

In a preferred embodiment, the honeycomb units are identical and adjacent, and the number of the honeycomb units is greater than or corresponding to the number of single batteries.

In a preferred embodiment, the honeycomb unit is in the shape of a hexagonal column, and the single battery is in a cylindrical shape.

In a preferred embodiment, the base is in the shape of a hollow hexagonal prism.

In the utility model, the positive poles of all single batteries face downward uniformly, and the serial and parallel connection between the batteries is realized by stacking the busbars, and the circuit structure is integrated and optimized to realize the "wireless" circuit; the single batteries are installed in a plug-in type without welding Copper nuts and bolts, easy to install, easy to maintain, not easy to fall off after long-term operation, high reliability.

【Description of drawings】

Fig. 1 is a three-dimensional exploded schematic diagram of an electric vehicle chassis device provided by a preferred embodiment of the present invention.

Fig. 2 is a partial cross-sectional schematic diagram of the assembly of the electric vehicle chassis device provided by the preferred embodiment of the present invention.

Fig. 3 is a three-dimensional exploded view of some components of the electric vehicle chassis device provided by the preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of the combination shown in FIG. 3 .

FIG. 5 is a perspective view of the single battery shown in FIG. 1 .

FIG. 6 is a perspective view of the bus circuit board of the chassis device of the electric vehicle shown in FIG. 1 .

FIG. 7 is a partially enlarged view of area A shown in FIG. 6 .

【detailed description】

In order to make the purpose, technical solution and beneficial technical effects of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the utility model, not for limiting the utility model.

As shown in FIGS. 1 to 3 , an electric vehicle chassis device 100 provided by the present invention includes an upper cover plate 10 , a honeycomb housing structure 20 , a lower guard plate 30 , a bus circuit board 40 and a battery assembly 50 . The chassis device 100 is mounted on a vehicle frame (not shown).

The bus circuit board 40 includes a positive bus layer 41 and a negative bus layer 42 located on the positive bus layer 41 and insulated from the positive bus layer 41 . The bus circuit board 40 is disposed on the lower guard plate 30 , the honeycomb housing structure 20 is disposed on the negative bus layer 42 , and the upper cover 10 is disposed on the honeycomb housing structure 20 . The honeycomb housing structure 20 includes a plurality of identical and adjacent hollow honeycomb units 21 . The battery assembly 50 includes a plurality of single cells 51 , bases 52 corresponding in number to the single cells 51 , and electrical connectors 53 corresponding in number to the single cells 51 . Each single battery 51 includes a positive terminal 511 and a negative terminal 512 opposite to the positive terminal 511 , and each single battery 51 is accommodated in a corresponding honeycomb unit 21 . Each base 52 is provided with a through hole 521, each base 52 is accommodated in a corresponding honeycomb unit 21 and is set outside a corresponding single battery 51, and each electrical connector 53 is provided on a corresponding base within 52. The negative end 512 of each single battery 51 faces the upper cover 10 . The positive end 511 of each single battery 51 is electrically connected to the positive electrode bus layer 41 through the corresponding through hole 521 of the base 52 . Each electrical connector 53 is electrically connected to the housing 513 of a corresponding single battery 51 and the negative electrode bus layer 42 .

Both the upper cover plate 10 and the lower guard plate 30 are made of aluminum alloy through integral machining. The aluminum alloy can be made of light and high-strength aluminum alloy. For example, its composition can be composed of the following raw materials in weight percentage: Fe: 0.10～0.14%, Mn: 0.03～0.04%, Si: 0.02～0.04%, Ti: 0.01～ 0.06%, B: 0.03～0.09%, Zn: 2.2～2.9%, Mg: 0.9～1.0%, Cu: 1.1～1.3%, Ce: 0.5～1.0%, Sc: 0.1～0.4%, the balance is Al, The tensile strength of the above aluminum alloys can reach more than 700MPa. In this embodiment, both the cover plate 10 and the lower guard plate 30 are rectangular. In other embodiments, the shapes of the upper cover plate 10 and the lower guard plate 30 are not limited to rectangles.

The honeycomb housing structure 20 can be made of insulating material with high thermal conductivity and high hardness through a molding process, and the honeycomb housing structure 20 includes a plurality of identical and adjacently connected hollow honeycomb units 21 . The honeycomb unit 21 includes a side wall 211 having a thickness of 1 to 2 mm. In this embodiment, the honeycomb unit 21 is a hexagonal prism, the two ends of the hexagonal prism are open and the sidewall 211 is perpendicular to the upper cover plate 10 . In other embodiments, the honeycomb unit 21 may also be in other regular shapes, for example, triangular prisms, square prisms, pentagonal prisms, octagonal prisms, or columns. The honeycomb housing structure 20 further includes a top surface 212 and a bottom surface 213 opposite to the top surface 212 , the top surface 212 and the bottom surface 213 are also the top surface 212 and the bottom surface 213 of the honeycomb unit 21 .

The height of each honeycomb unit 21 is slightly less than the height of a single battery 51, the honeycomb unit 21 is used to accommodate the single battery 51, the number of the honeycomb unit 21 can correspond to the number of the single battery 51, also can be more than the single battery The number of 51. When the number of the honeycomb units 21 corresponds to the number of the single batteries 51 , each honeycomb unit 21 accommodates one single battery 51 . When the number of honeycomb units 21 is greater than the number of single batteries, some of the honeycomb units 21 accommodate single batteries, and other parts of the honeycomb units 21 may not accommodate single batteries. All the honeycomb units 21 may have the same or different shapes, may be adjacent to each other, or partially disconnected, or not connected to each other. For the convenience of manufacture, in this embodiment, the honeycomb units 21 have the same shape and are adjacent to each other.

Please refer to FIGS. 2 , 6 and 7 , the anode bus layer 41 and the cathode bus layer 42 are insulated. The positive electrode confluence layer 41 and the negative electrode confluence layer 42 can be made of light-weight and high-conductivity alloy plates. The negative bus layer 42 is provided with a plurality of via holes 43 , and each via hole 43 has an elastic conductive member 44 inside. The elastic conductive member 44 further includes a top contact piece 441 , a spring 442 disposed below the top contact piece 441 , and a bottom contact piece 443 . The top contact piece 441 is made of conductive material and is circular. The spring 442 is made of metal and one end is welded to the top contact piece 441 . The other end of the spring 442 is welded to the bottom contact piece 443 , and the bottom contact piece 443 is further electrically connected to the positive bus layer 41 by welding or other means. The bus circuit board 40 includes a plurality of sub-circuit boards 401 , and each sub-circuit board 401 includes the positive bus layer 41 and the negative bus layer 42 . Two adjacent sub-circuit boards 401 are connected in series. Wherein each via hole 43 corresponds to a corresponding one of the cellular units 21 .

Please refer to FIG. 5 , each unit battery 51 is a cylindrical lithium battery. The positive terminal 511 serves as the positive terminal of the single battery 51 and has a protruding contact portion 5110 , and the positive terminal 511 is also provided with an insulating rubber gasket 5111 . The negative terminal 512 is the negative terminal of the single battery and is planar. The negative terminal 512 is integrated with the cylindrical shell 513 of the single battery 51 , that is, the shell 513 also serves as the negative pole of the single battery 51 . The insulating gasket 5111 isolates the positive terminal 511 and the casing 513 . The shell 513 is also rolled with a circular groove 5131 .

Referring to FIGS. 2 to 4 , each base 52 is made of insulating material and is a hexagonal prism with two ends open. The hexagonal prism of each base 52 is smaller than the hexagonal prism of the honeycomb unit, so that each honeycomb unit 21 can just fit outside the corresponding base 52 , and each base 52 defines a through hole 521 . And one end of each base 52 extends toward the center of the through hole 521 to form an inner edge 522 . Each electrical connector 53 includes an arc-shaped clamping portion 531 , a plurality of electrical contact pins 532 extending from one side of the clamping portion 531 at even intervals, and a positioning column 533 . Each electrical contact pin 532 protrudes toward the center of the holding portion 531 to form a protruding contact 5321 .

When assembling, the bus circuit board 40 is arranged on the lower protective plate 30, and the two can be combined together by epoxy resin bonding or other methods; then each electrical connector 53 is accommodated in a corresponding base In the through hole 521 of the seat 52, wherein the clamping portion 531 of the electrical connector 53 abuts against the inner edge 522 of the base 52, and then the base 42 is loaded into the corresponding honeycomb unit 21, wherein The base 42 is close to the bottom surface 213 of the honeycomb housing structure 20; then the honeycomb housing structure 20 is placed on the negative electrode bus layer 42 of the bus circuit 40, and the honeycomb housing structure 20 and the bus circuit board 40 can be bonded by epoxy resin. each housing unit 21 corresponds to a via hole 43; then each single battery 51 is packed into a corresponding honeycomb unit 21, wherein all the single cells accommodated in the honeycomb unit 21 The negative terminals 512 of the bulk batteries 51 all face the same direction and are located on the same plane, that is, close to the top surface 212 ; the positive terminals 411 all face the same direction and are close to the bottom surface 213 . The contact portion 5110 of the positive end 511 passes through the through hole 421 of the corresponding base 52 and abuts against a corresponding elastic conductive member 44, specifically, the contact portion 5110 of the positive end 511 abuts against the top contact piece 441 of the elastic conductive member 44 In this way, the positive electrode of the single battery 51 is electrically connected to the positive electrode bus layer 41 through the elastic conductive member 44 . The clamping portion 531 of each electrical connector 53 is clamped outside the casing 513 of a corresponding single battery and is in electrical contact with the casing, and the protruding contact 5321 of the electrical contact pin 532 is located in the groove of the casing of the single battery 51 5131 and is in electrical contact with the shell, one end of the electrical contact pin 531 is in electrical contact with the contact point on the surface of the negative electrode bus layer 42, so that the negative pole of the single battery 51 is electrically connected to the negative electrode bus layer 42 through the electrical connector 53 sexual connection. The positioning column 533 is correspondingly matched with the positioning hole 402 of the bus circuit board 40 . Finally, the upper cover plate 10 is arranged on the honeycomb housing structure 20 , and the upper cover plate 10 and the honeycomb housing structure can be combined by epoxy resin bonding or other methods.

When in use, the single batteries on each sub-circuit board are connected in parallel, and the sub-circuit boards are further connected in series, so that all the single batteries are connected in series and parallel through the bus circuit board on the bottom surface of the honeycomb housing structure to form a high-voltage battery group is used to power the powertrain. In addition, the application of elastic conductive parts and electrical connectors saves the use of existing cables, which is convenient for maintenance, high in reliability and safer in use.

In the utility model, the positive poles of all single batteries face downward uniformly, and the serial and parallel connection between the batteries is realized by stacking the busbars, and the circuit structure is integrated and optimized to realize the "wireless" circuit; the single batteries are installed in a plug-in type without welding Copper nuts and bolts are easy to install, easy to maintain, not easy to fall off after long-term operation, and have high reliability. The bus circuit board is made of light-weight and high-conductivity alloy plate. The circuit structure is simple and has a good lightweight effect. The base can not only restrict the left and right movement of the battery, but also prevent the battery from moving up and down through the upper cover plate, and the structural connection is highly reliable; the sinking circuit board has a simple structure, and there is no need to add auxiliary processes such as bending and adding rubber pads to realize the serial connection of the battery pack. in parallel.

The utility model is not limited to the description in the description and the implementation, so those skilled in the art can easily realize additional advantages and modifications, so without departing from the spirit and general concept defined by the claims and equivalent scope Without limitation, the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein.

Claims (10)

1. a kind of electric automobile chassis device, it is characterised in that：Including upper cover plate, honeycomb installation structure, lower backplate, conflux circuit Plate and battery component；The circuit board that confluxes includes that positive pole confluxes and layer and confluxes on layer positioned at positive pole and exhausted with the positive pole layer that confluxes The negative pole of edge confluxes layer；The circuit board that confluxes is arranged on the lower backplate, and the honeycomb installation structure is arranged at described negative Pole is confluxed on layer, and the upper cover plate is arranged on the honeycomb installation structure；The honeycomb installation structure includes multiple hollow Cellular unit, the battery component include multiple cells, quantity pedestal corresponding with cell and quantity and monomer The corresponding electric connection part of battery；Each cell includes a positive terminal and a negative pole end opposite with positive terminal, often Individual cell is contained in one cellular unit of correspondence；Each pedestal offers a through hole, and each pedestal is contained in corresponding One cellular unit is interior and is placed on outside a corresponding cell, and each is electrically connected with part and is arranged in one pedestal of correspondence； The negative pole end of each cell is towards the upper cover plate, the through hole of the positive terminal perforation correspondence pedestal of each cell and institute State positive pole conflux layer electric connection；Each is electrically connected with shell and the negative pole remittance that part is electrically connected with one cell of correspondence Fluid layer.

2. electric automobile chassis device as claimed in claim 1, it is characterised in that：The negative pole layer that confluxes offers multiple mistakes Hole, each via is corresponding with a corresponding cellular unit and each via in there is a resilient conductive element；The positive terminal tool Bossed contact site, the contact site are resisted against on one resilient conductive element of correspondence through the through hole of correspondence pedestal.

3. electric automobile chassis device as claimed in claim 2, it is characterised in that：The resilient conductive element includes top contact Piece, the spring being arranged at below top contact piece and bottom contact chip；The spring is one end and the top contact piece, separately One end is connected to bottom contact chip, and bottom contact chip is further electrically connected to the positive pole and confluxes layer；The contact site against On the top contact piece；The circuit board that confluxes offers the location hole of locating dowel corresponding matching.

4. electric automobile chassis device as claimed in claim 3, it is characterised in that：The shell of the cell is provided with one Circular groove；It is described to be electrically connected with the holding section and multiple uniform intervals settings extended from holding section side for including arc Haptic element is electrically connected with, each is electrically connected with haptic element projection and forms bump contacts；The holding section is stuck in the outer of one cell of correspondence Shell is outer and in electrical contact with shell, and the bump contacts are located in the groove of shell and in electrical contact with shell.

5. electric automobile chassis device as claimed in claim 4, it is characterised in that：The electric connection part also includes positioning Post, the circuit board that confluxes offer the location hole with locating dowel corresponding matching.

6. electric automobile chassis device as claimed in claim 4, it is characterised in that：Center of the one end of each pedestal to through hole Extension forms inner edge；The holding section is resisted against on the inner edge of pedestal.

7. electric automobile chassis device as claimed in claim 1, it is characterised in that：The circuit board that confluxes includes many height electricity Road plate；It is parallel with one another between cell on each sub-circuit board, further connect between sub-circuit board.

8. electric automobile chassis device as claimed in claim 1, it is characterised in that：The cellular unit is identical and adjacent, The quantity of the cellular unit is more than or corresponding to the quantity of cell.

9. electric automobile chassis device as claimed in claim 8, it is characterised in that：The cellular unit be six water chestnut columns, institute It is cylindric to state cell.

10. electric automobile chassis device as claimed in claim 9, it is characterised in that：The pedestal is six hollow water chestnut columns.