CN206250247U - A kind of power battery of electric vehicle case lower box - Google Patents

Abstract

The utility model discloses a kind of power battery of electric vehicle case lower box, several are circumferentially placed equidistant in the open top of the lower box, and upper surface at opening for the screwed hole of installing case lid；Characterized in that, the lower box is integrally made using aluminium alloy, and the side wall that sets along its length and the louvre that some insertions along its length are set is respectively provided with base plate.The utility model has rational in infrastructure, and lighter weight, intensity is higher, can be prevented effectively from battery in case and be collided with ground, and safety in utilization is higher, the advantages of good heat dispersion performance.

Description

A kind of power battery of electric vehicle case lower box

Technical field

The utility model is related to electric vehicle engineering field, in particular to a kind of power battery of electric vehicle case nowel Body.

Background technology

Attention with the fast development of World Economics and to environmental consciousness, the popularity rate more and more higher of automobile, while right The requirement of motor vehicle exhaust emission also more and more higher.Energy-conservation and the oil electricity hybrid vehicle and energy-conservation of low emission, free of contamination ideal " zero-emission " pure electric automobile is following development trend.

Electric automobile refers to, with vehicle power as power, to be travelled with power wheel, meets road traffic, security legislation The vehicle of requirements.The composition of electric automobile includes：Power storage device, driven by power and control system, driving force transmission Etc. mechanical system etc..Early in 1873 of the second half in 19th century, British Robert Dai Weisen (Robert Davidsson) The electric automobile for being available for practicality initial is in the world made.With the raising of technology mature degree, domestic and international automobile life Business men is successively proposed hybrid power and pure electric automobile.Compared with hybrid vehicle, pure electric automobile is completely without adding Oil, it is more environmentally-friendly.But pure electric automobile is compared with conventional fuel oil automobile, or compared with hybrid vehicle, It is clearly present the short deficiency of course continuation mileage.The course continuation mileage of pure electric automobile is improved, on the one hand needs to improve cell Capacity；On the other hand the quantity of raising vehicle cell is needed；The capacity of cell is restricted with existing battery electrode material Material and prior art are not enough.Current electric automobile manufacturer is mainly increased in continuation of the journey using the quantity for improving vehicle cell Journey.

The existing electric automobile overwhelming majority arranges battery case to make full use of the space under chassis all under automobile chassis, For electric automobile provides more cells, but as the increase of number of batteries, the volume of battery case increase, cause battery The weight of case increases, and increases the weight of vehicle, so that the effective rate of utilization of battery and the course continuation mileage of electric motor car are influenceed, because This to battery case, it is necessary to carry out light-weight design.Simultaneously as battery case is located at chassis lower section, battery case can be increased and jolted The risk that the wiping on road surface is touched, in addition it is also necessary to consider the intensity of battery case.

Utility model content

For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is：How a kind of knot is provided Rationally, lighter weight, intensity is higher, can be prevented effectively from battery in case and be collided with ground, and safety in utilization is higher, thermal diffusivity for structure Can preferable power battery of electric vehicle case lower box.

In order to solve the above-mentioned technical problem, the utility model employs following technical scheme：

On a kind of power battery of electric vehicle case lower box, the open top of the lower box, and upper surface at opening Circumferentially being placed equidistant several is used to install the screwed hole of case lid；Characterized in that, the lower box is integrally closed using aluminium Gold makes, and the side wall that sets along its length and the louvre that some insertions along its length are set is respectively provided with base plate.

Aluminium alloy has density low, and intensity is higher, and near or above high-quality steel, plasticity is good, can be processed into various section bars. Making lower box using aluminium alloy on the premise of proof strength, can mitigate the weight of battery case, reduce the weight of vehicle, Under equal battery total capacity, the course continuation mileage of electric automobile is improved.In addition, battery case to be arranged on the tray bottom of automobile, make Probability increase is touched in the wiping for obtaining battery case uneven ground, and lower box is made using aluminium alloy, can improve the intensity of lower box, is prevented Electrokinetic cell in battery case is damaged, and is conducive to improving the overall security of battery case.Meanwhile, set along length on lower box The louvre of direction insertion so that the side wall and base plate of lower box form the reinforcement of many, so, can either ensure nowel The intensity of body, can mitigate the weight of lower box again.In addition, increased louvre can increase the area of dissipation of lower box, when During the traveling of automobile, the air of flowing is passed through from louvre, can take away the heat in louvre, it is to avoid battery case overheat and Influence the performance of battery.

Used as optimization, the upper end of the lower box stretches out to form the shirt rim of ring-type in the horizontal direction, the screwed hole On the shirt rim.

In order to be threaded hole in the sidewall upper of lower box, it is necessary to make the thickness of side wall more than the diameter of screwed hole, meeting Cause side wall too thick, so as to increase the weight of lower box；Using said structure, can be both threaded in the upper end of lower box Hole, can reduce the thickness of side wall again, reduce the weight of lower box, be conducive to the lightweight of vehicle body.

Used as optimization, the inner side of the top open part of the lower box has and upwardly extends to form ring along short transverse The locating flange of shape, the outline of the locating flange is consistent with the Internal periphery of corresponding case lid.

Using said structure, during assembling, case lid can be carried out by locating flange spacing, case lid can be enable quick Be coupled on lower box, so as to facilitate workman to be assembled, improve assembling efficiency.

Used as optimization, the upper end of the locating flange has the chamfering being obliquely installed towards lower box inner side.

So, more facilitate guiding case lid quickly to coordinate on lower box, improve the efficiency of assembling.

Used as optimization, the both sides of the lower box are each provided with several mounting brackets, and the mounting bracket is in integrally Z-shaped, Including the bottom plate that the base plate with the lower box fits, the fixed plate for setting of being fitted with the side wall of the lower box, and Along the upper plate that the sidewall direction away from the lower box is set, the bottom plate, fixed plate and upper plate are integrated bending Shaping, mounting hole is provided with the upper plate.

The minimum point of automobile axle or power transmission shaft is above due to the mount point of bottom of car, to make full use of the difference in height The space at place, while being easy to battery case to be connected with base plate or longeron, it is necessary to the connecting plate of battery case is arranged in battery case , using said structure, be fixed on battery case on chassis using the mounting bracket in Z-shaped by portion, and upper plate can either be made convenient On base plate or longeron, while lifted to the bottom of battery case using bottom plate again, fixed plate and battery case are prevented The Joint failure of side wall, causes coming off for battery case, improves the stability of connection.

As optimization, reinforcing plate triangular in shape is additionally provided between the both sides of the upper plate and the fixed plate.

In sum, the utility model has rational in infrastructure, and lighter weight, intensity is higher, can be prevented effectively from electricity in case Pond is collided with ground, and safety in utilization is higher, the advantages of good heat dispersion performance.

Brief description of the drawings

Fig. 1 is a kind of electric automobile whole arrangement schematic diagram of use the utility model structure.

Fig. 2 is the cross section structure diagram of battery case in Fig. 1.

Fig. 3 is the close-up schematic view at A in Fig. 2.

Specific embodiment

It is new to this practicality with reference to a kind of accompanying drawing of the electric automobile whole arrangement of use the utility model structure Type is described in further detail.

During specific implementation：As shown in FIG. 1 to 3, a kind of base plate 1 of electric automobile whole arrangement, including automobile with And two longerons 2 for being arranged on the bottom of car left and right sides, transverse strands are provided with automobile axle 3 on the longeron 2, after the automobile Linked together by damping device between bridge 3 and longeron 2；Also include installed in automotive front motor 4 and with drive The decelerator 5 that dynamic motor is connected, the output end of the decelerator 5 is connected by the power transmission shaft 6 set along length of wagon direction To the automobile axle 3；Battery case 7 is additionally provided between the power transmission shaft 6 and any longeron 2, the battery case 7 is overall In the cuboid set along motor vehicle length direction；Between the width of the battery case 7 and the power transmission shaft 6 and the longeron 2 Size matches, and makes there is gap between the battery case 7 after installation and the power transmission shaft 6；The battery case 7 is near described The side of power transmission shaft 6 is bolted on the base plate 1, and the side away from the power transmission shaft 6 is bolted on position In on the longeron 2 of the side.

Using above-mentioned arrangement, battery case is set in the both sides of power transmission shaft, it is ensured that the quality of the vehicle left and right sides It is more balanced.In addition, the size between the width and power transmission shaft and the longeron of battery case matches, it is ensured that battery case The space of power transmission shaft both sides can be made full use of, increases the space availability ratio on chassis, arrange more electrokinetic cells, be conducive to carrying The total capacity of battery high, improves the course continuation mileage of electric automobile.

During implementation, the top of the battery case 7 fits with the base plate 1, bottom and the automobile axle 3 or power transmission shaft 6 minimum point is located at sustained height.

Using above-mentioned setting, can be on the premise of passing through property of vehicle not be influenceed, arrangement electrokinetic cell as much as possible is carried The total capacity of vehicle battery high, and then increase course continuation mileage.

During implementation, the battery case 7 includes open-topped lower box 71 and is equipped with the lower box 71 The case lid 72 of top open part；The lower box 71 is overall to be made using aluminium alloy, and the sidewall upper of the lower box 71 has Some screwed holes being circumferentially placed equidistant；The lower end of the case lid 72 stretches out to form the connection of ring-type in the horizontal direction Side, has the through hole corresponding with the screwed hole on the connection side, the case lid 72 is by the bolt through the through hole It is fixedly mounted on the screwed hole of the lower box.

Aluminium alloy has density low, and intensity is higher, and near or above high-quality steel, plasticity is good, can be processed into various section bars. Making casing using aluminium alloy on the premise of proof strength, can mitigate the weight of battery case, the weight of vehicle be reduced, same Etc. under battery total capacity, the course continuation mileage of electric automobile is improved.In addition, battery case to be arranged on the tray bottom of automobile so that Probability increase is touched in the wiping of battery case uneven ground, and lower box is made using aluminium alloy, can improve the intensity of lower box, prevents electricity Electrokinetic cell in the case of pond is damaged, and is conducive to improving the overall security of battery case.

During implementation, the upper end of the lower box 71 stretches out to form the shirt rim 711 of ring-type, the screw thread in the horizontal direction Hole position is on the shirt rim 711.

In order to be threaded hole in the sidewall upper of lower box, it is necessary to make the thickness of side wall more than the diameter of screwed hole, meeting Cause side wall too thick, so as to increase the weight of lower box；Using said structure, can be both threaded in the upper end of lower box Hole, can reduce the thickness of side wall again, reduce the weight of lower box, be conducive to the lightweight of vehicle body.

During implementation, the inner side of the top open part of the lower box 71 has and upwardly extends to form ring along short transverse The locating flange 712 of shape, Internal periphery and the outline of the locating flange 712 of the lower end of the case lid 72 match, and make described Locating flange 712 can coordinate in the case lid 72.

Using said structure, case lid is carried out by locating flange spacing, can made on through hole on case lid and lower box Corresponding screwed hole is quickly aligned, and so as to facilitate workman to be assembled, improves the efficiency of assembling.

During implementation, the upper end of the locating flange 712 has the chamfering being obliquely installed towards the inner side of the lower box 71.

So, more facilitate guiding case lid quickly to coordinate on lower box, improve the efficiency of assembling.

During implementation, there are some insertions along its length on side wall that the lower box 71 is set along its length and base plate The louvre of setting.

Using above-mentioned structure, the louvre of insertion along its length is set on lower box so that the side wall of lower box And base plate forms the reinforcement of many, so, can either ensure the intensity of lower box, there is the weight that can mitigate lower box. In addition, increased louvre can increase the area of dissipation of lower box, when the traveling of automobile, the air of flowing is from louvre Pass through, the heat in louvre can be taken away, it is to avoid battery case is overheated and influences the performance of battery.

During implementation, the both sides of the width of the lower box 71 are each provided with several mounting brackets 73, the mounting bracket 73 Entirety is fitted with the side wall of the lower box 71 and is set in Z-shaped, including the bottom plate fitted with the base plate of the lower box 71 The fixed plate put, and along away from the lower box 71 sidewall direction set upper plate, the bottom plate, fixed plate and Upper plate is integrated bending forming, and mounting hole is provided with the upper plate；The battery case 7 is by through the mounting hole Bolt is fixedly mounted on the base plate 1 and longeron 2.

The minimum point of automobile axle or power transmission shaft is above due to the minimum point of base plate and the lower surface of longeron, is abundant profit With the space at the difference in height, while being easy to battery case to be connected with base plate or longeron, it is necessary to the connecting plate of battery case is arranged on , using said structure, be fixed on battery case on chassis using the mounting bracket in Z-shaped by the middle part of battery case, can either be made Connecting plate is conveniently installed on base plate or longeron, while lift the bottom of battery case using bottom plate again, prevents from fixing Plate and the Joint failure of battery case side wall, cause coming off for battery case, improve the stability of connection.

During implementation, reinforcing plate triangular in shape is additionally provided between the both sides of the upper plate and the fixed plate.So, The intensity of mounting bracket can be improved.

During implementation, the case lid 72 is made using fiberglass, and the both sides that the connection side is located at the through hole are each provided with One reinforcement.

Fiberglass has light weight, and intensity is high, corrosion-resistant, and insulating properties is preferable.The case lid of battery case is made using fiberglass, The overall weight of battery case can further be mitigated.In addition, the processing performance of fiberglass is preferably, can enter according to the shape of base plate Row design.So, battery case can be made more to be matched with base plate, improves the utilization rate in chassis space.Due to the shearing of fiberglass Low intensity, the through hole on connection side goes out to set reinforcement, can improve the bonding strength of case lid and lower box, improves the company of the two Connect stability.

Preferred embodiment of the present utility model is the foregoing is only, is not limitation with the utility model, it is all at this Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model Protection domain within.

Claims (6)

1. edge on a kind of power battery of electric vehicle case lower box, the open top of the lower box, and upper surface at opening It is circumferentially equidistant to be provided with several for installing the screwed hole of case lid；Characterized in that, the lower box integrally uses aluminium alloy Make, and the side wall that sets along its length and the louvre that some insertions along its length are set is respectively provided with base plate.

2. power battery of electric vehicle case lower box as claimed in claim 1, it is characterised in that the upper end edge of the lower box Horizontal direction stretches out to form the shirt rim of ring-type, and the screwed hole is located on the shirt rim.

3. power battery of electric vehicle case lower box as claimed in claim 1, it is characterised in that opened at the top of the lower box Mouthful inner side in place has a locating flange for being upwardly extended along short transverse and forming annular, the outline of the locating flange and The Internal periphery of corresponding case lid is consistent.

4. power battery of electric vehicle case lower box as claimed in claim 3, it is characterised in that the upper end of the locating flange With the chamfering being obliquely installed towards lower box inner side.

5. power battery of electric vehicle case lower box as claimed in claim 1, it is characterised in that the both sides of the lower box are each Several mounting brackets are provided with, the mounting bracket is integrally in Z-shaped, including the subiculum fitted with the base plate of the lower box Plate, the fixed plate for setting of being fitted with the side wall of the lower box, and along the upper of the sidewall direction setting away from the lower box Connecting plate, the bottom plate, fixed plate and upper plate are integrated bending forming, and mounting hole is provided with the upper plate.

6. power battery of electric vehicle case lower box as claimed in claim 5, it is characterised in that the both sides of the upper plate with Reinforcing plate triangular in shape is additionally provided between the fixed plate.