The new energy information analysis network will be Aion of GAC New Energy? The vehicle platform and electric drive system (including thermal management strategy of power battery) of LX four-wheel drive version are comprehensively judged. Combined with the development of new energy vehicle market in China in 2020, the competitive situation of new car-making forces and joint venture brands is deeply analyzed.
Thanks to Guangzhou Automobile New Energy Guangzhou Automobile New Energy Beijing Xinminheng Experience Center (West Gate of Dingjia Cultural Pioneer Park, Jinshengda Street, Daxing District, Beijing) for providing NEDC cruising range of 600 kilometers Aion? LX four-wheel drive test drive for in-depth evaluation.
Guangzhou Automobile New Energy Aion? LX adopts a vehicle platform developed forward, with a length, width and height of 4786x 1935x 1685 and a wheelbase of 2920mm. As a medium and large electric four-wheel drive SUV, GAC New Energy Aion? The biggest advantage of LX 2920mm wheelbase is that it can be used to arrange the power battery assembly with more power and completely "absorbed" in the body welding, and at the same time, it will make the passenger space in the car more abundant and the rear floor more straight.
From the tower of eternity? According to the actual state of LX bottom, the front drive axle lower guard plate and the intermediate power battery lower guard plate are on the line 1. The lowest end of the power battery assembly is the same as the lowest end of the welded side beam of the car body, which is used to improve the protection ability of side collision.
When removing the lower guard plate of the front drive axle, firstly loosen more than 10 fixing bolts distributed in the periphery and center. Set 1 group of independent and detachable inspection windows in the center of the front drive axle lower guard plate (red area). These 10 fixing bolts (blue arrows) are used not only to fix the periphery, but also to fix the center position to prevent sinking. At present, the author has noticed in many electric vehicles evaluated in the past that although many models are equipped with plastic or composite lower guard plates, there are more or less depressions and frictions when driving because the center is not fixed for a long time.
The above picture is a close-up of technical details such as aluminum alloy frame subframe and A-type lower swing arm when the lower guard plate of the front drive axle is removed. Because the front radiator lower guard plate does not affect the removal evaluation.
The picture above shows Aion? Close-up of technical details of LX four-wheel drive front suspension
Blue arrow: aluminum alloy front steering knuckle
Red arrow: A-shaped lower arm
Yellow arrow: aluminum alloy A-type lower swing arm bearing is fixed.
Green arrow: aluminum alloy frame subframe
The picture above shows Aion? Close-up of technical details of LX four-wheel drive front frame subframe.
Red area: aluminum alloy front frame subframe
Blue arrow: the rear cross member of the frame subframe.
Yellow arrow: used to "hang" the cross beam of the front drive motor.
Green arrow: The subframe of the front frame is made of aluminum alloy and welded, which is used for multiple beams and components.
The above picture shows a close-up of the front "3-in-1 1 1" electric drive assembly suspended on the aluminum alloy front frame subframe.
Yellow arrow: single drive motor reducer wrapped by noise reduction and heat insulation kit.
Red arrow: "three-in-one 1" drive motor assembly, with maximum output power 150 kW and maximum output torque of 350 Nm.
Blue arrow: the heat exchanger (coolant) is fixed at the end of the front "3 in 1" electric drive assembly.
Green arrow: electronic water pump and servo electric drive system provided by Bosch.
It should be pointed out that the rubber dust jacket that suppresses noise also has a negative effect on heat dissipation. Eternal tower? The LX-equipped front-mounted "3-in-1 1 1" electric drive assembly only wraps the dust-proof sleeve on the reducer (gear and bearing) that produces noise, and does not affect the heat dissipation efficiency of the permanent magnet synchronous motor body whose operating temperature exceeds 90 degrees Celsius.
Guangzhou Automobile New Energy Aion? LX four-wheel drive version is equipped with "three-in-one 1" drive motor, with the highest speed of 16000 rpm, integrated motor controller and standard 1 heat exchanger to improve heat dissipation efficiency.
Because of the tower of eternity? LX inherits a brand-new thermal management strategy, that is, part of the heat generated by the front "3-in-11"electric drive assembly is introduced into the cockpit air conditioning system for heating through pipes. At the same time, the control strategy of adding heat from the driving motor to preheat the power battery at low temperature is retained, and the control system of preheating the battery at low temperature through two groups of PTC control modules with different powers and providing air conditioning heating for the cockpit is also retained.
The picture above shows Aion? LX mid-range power battery assembly-1 Close-up of technical details at the bottom.
White arrow: outlet of circulating pipeline of liquid thermal management system of power battery.
Yellow arrow: outlet of circulating pipeline of liquid thermal management system of power battery.
Blue arrow: communication cable interface
Green arrow: High voltage cable interface (to front drive motor)
The power battery assembly is loaded with 93 kWh, and the energy density reaches 180Wh/kg by using the 81high nickel ternary lithium battery provided by Amperex Technology Co., Ltd.. In order to ensure the internal active safety of "high activity" battery system (accurately controlling the temperature through thermal management system), it is necessary to have more perfect external passive safety settings (fixedly protecting the power battery shell and the whole vehicle).
As part of the original factory standard, Aion? LX's power battery is equipped with 1 set of noise reduction and foreign body protection plates at the bottom, and the middle is reinforced with 6 bolts (white arrows). This group of guard plates is fixed on the periphery of the bottom of the battery module, and the central position is longitudinally reinforced, so that it will not sink under the influence of gravity for a long time.
The picture above shows Aion? LX Intermediate Power Battery Assembly Technology -2 Bottom Detail Close-up.
Red arrow: aluminum alloy shell of power battery assembly.
Green arrow: aluminum alloy front frame subframe reinforcement plate.
Yellow arrow: The lining is integrated with the wheel lining.
Blue arrow: honeycomb structure at the intersection of front firewall welding and body side member and front floor welding (reinforcement and weight reduction).
The two corners of the front end (near the front drive axle) of the power battery assembly which is completely "embedded" in the car body for welding are treated with bevel edges. This part of the "missing" space is occupied by the front frame and sub-frame reinforcement plate made of aluminum alloy and covered by the liner plate integrated with the 1 group wheel liner plate. Generally speaking, in the case of frontal or 25% offset collision, a considerable space is reserved for the backward collapsed front wheel to ensure that the impact force on the power battery assembly is suppressed within the preset range.
In addition, I have to mention GAC New Energy Aion here? LX adaptive power battery assembly is developed and mass-produced by Guangzhou Automobile New Energy Research Institute, and the 8 1 1 high nickel ternary lithium battery with 590Ah capacity is provided by Contemporary Anpu Technology Co., Ltd. 590Ah battery should be regarded as the top specification among mainstream soft-pack, square and cylindrical batteries on the market. This allows Aion to load 93 kWh of electricity? LX power battery assembly has better utilization rate of internal space, and even can better control the overall height to "expand" the passenger space in the car.
The picture above shows Aion? Close-up of technical details of LX mid-range power battery assembly -3 bottom.
Red arrow: air conditioning condensate pipe
Blue arrow: the cold energy water pipe is rigidly fixed by the bracket.
Why take out the cold energy water pipe assembly separately? Obviously, GAC New Energy Aion? LX is very careful in this subtle setting. The condensed water pipeline is fixed by the bracket to ensure that the condensed water is directly discharged from the car (fender) and will not be stored in the fender, and the water pipe will not swing (make abnormal noise) at will.
The picture above shows Aion? Close-up of technical details of LX rear "3 in 1 "electric drive assembly-1.
Eternal tower? The front drive axle of LX adopts aluminum alloy full-frame subframe, and the rear drive axle adopts steel subframe (red area) and aluminum alloy 5-bar structure. The reducer of "3-in-1 1 1" front drive assembly is wrapped with dust jacket, while the reducer of "3-in-1 1 1" rear drive assembly does not include dust jacket.
The picture above shows Aion? Close-up of technical details of 3-inch 1 inch electric drive assembly -2 behind LX.
Blue arrow: Driver's drive shaft (short)
White arrow: transmission half shaft (long) on the co-driver side.
Green arrow: 3 groups of aluminum alloy suspension mechanisms.
Blue area: "3-in-1 1" heat exchanger for electric drive module.
Eternal tower? The aluminum alloy front frame subframe of LX supports the 3-in-1 1 1 electric drive assembly and the 2-in-1 1 1 high voltage control assembly of DCDC+PDU "2" through a 3-point "suspension" mechanism. The rear steel subframe is used to lift the "3-in-1 1" electric drive assembly through a 3-point "suspension" mechanism.
In the fierce driving environment, the front drive axle has to bear the longitudinal, transverse and vertical moment impact and response, so the aluminum alloy full-frame subframe with better lightweight effect will have better fixing and restraint effect. As long as the rear drive axle can cope with the longitudinal and vertical distance impact, the design requirements can be met by adopting the steel subframe suspension with greater rigidity.
Besides, Aion? The high-voltage cable of LX's rear "three-in-one 1" electric drive assembly is led out from the rear end of the power battery assembly, rather than from the front power cabin with a longer cable. This setting of shorter high-voltage cable, lower calorific value and lower cost is closely related to the introduction of "three-in-one 1" electric drive assembly.
The picture above shows Aion? Technical details of LX rear suspension.
Red arrow: upper arm
Yellow arrow: upper traction arm
Green arrow: Rear control arm
Blue arrow: lower towing arm
Black arrow: lower arm
White arrow: steering knuckle
Eternal tower? The rear suspension of LX adopts five-bar independent structure made of aluminum alloy, which is extremely rare in domestic cars. Compared with the same type of domestic electric SUV models, GAC New Energy Aion? LX's technical advantage exceeds SAIC roewe Marrl? X. Beijing brand ARCFOX? And BYD Tang EV.
Adopting forward-looking vehicle platform, highly integrated electric drive technology and high-density power battery assembly, not only for Guangzhou Automobile New Energy Aion? LX brings more stable cruising range performance and indirectly improves passive safety.
Red arrow: center line of front drive axle
White arrow: front bumper housing
Yellow area: the electric drive assembly is arranged behind the front drive axle and behind the firewall.
Blue arrow: collision and collapse area
Eternal tower? LX's electric drive system and control system in the previous generation Aion? S, can be further integrated and miniaturized, even arranged at the rear position of the front drive axle, similar to the rear setting in the traditional automobile engine. The position of the drive system moves backward, which continuously reduces the load of the front drive axle, enhances the steering efficiency, and increases the collision subsidence area and safety of the front bumper.
The author has something to say:
Guangzhou Automobile New Energy Aion? The forward-developing vehicle platform (2920mm wheelbase) and all-aluminum suspension settings adopted by LX have surpassed the popular Tesla models from the starting point. 3。 The unique safety setting of power battery and thermal management strategy to reduce energy consumption are helpful to stabilize the decrease of cruising range when warm air is turned on in winter. Especially in the technical details that many terminal owners can't see, GAC New Energy has handled it very well.
Follow-up will launch "Depth: Comprehensive Research on Aion of GAC New Energy"? LX four-wheel drive vehicle platform "
Produced by evaluation group of new energy information analysis network
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.