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[YesAuto News] Recently, the topic of “suspicious charging time” for pure electric vehicles has been discussed fiercely on social media. The reason is that a certain car company used the inductive words “can charge up to 80% in 30 minutes” in product promotion. In the real experience of users, the charging time of 0-80% power is far beyond the official time. This reminds us of the “constant speed” slogan that the brand used to use before. These slogans that obviously use “cunning” are considered “false propaganda”. Let's talk together.

Information blind zone, whether the official fast charge involves false propaganda

“It can be charged to 80% in 30 minutes” and “The maximum battery life is up to xx kilometers” uses the same information blind spot in product promotion. Especially in the charging time of the vehicle, the brand does not specify how much power is charged to 80%. It has not stated what kind of equipment conditions the charging is under, so the slogan will play an inductive role, causing some consumers to mistakenly believe that these “official data” are real product performance, thereby increasing their confidence in buying.

The “rechargeable up to 80% in 30 minutes” propaganda technique, in addition to being inductive in text, also captures some consumers' blind spots in the basic charging knowledge of new energy vehicles. Users who have a certain understanding of vehicle charging must know that most battery systems will be called “trickle state” in the two stages of 0-30% and 80%-100%. This state is for the purpose of the battery control system. Ensure that the battery will not be overcharged (safety and life), thereby actively reducing the charging power.

At present, most vehicles will only climb to the peak charging power after the battery is charged to 30%. Therefore, it is difficult to achieve “0%-80% only 30 minutes” for pure electric vehicles at this stage (requires too many environmental factors to support) , But it is precisely this kind of publicity that is used to confuse consumers who lack this knowledge.

Also due to the different technical backgrounds of battery capacity and control system strategies between brands, the official charging time information range is also different. For example, there are sayings that 10%-80% or 20%-80% are provided, and there are also direct indications of 30 minutes. It can be charged into the description of the XX cruising range, and the charging habits of users are also different, so there is currently no standard for the background of the charging interval in the industry.

In terms of publicity, in addition to the superficial word game, “constant speed endurance” and “official charging time” need to be realized under extremely ideal objective conditions on a practical level. At present, in the vehicle information of the Ministry of Industry and Information Technology, the national standard will have a clear NEDC cruising range for consumers' reference, but the charging time in the Ministry of Industry and Information Technology does not show the data. This also makes the current “official charging time” a favorable publicity tool in the hands of brands in disguise. Consumers do not have a second way to view neutral information that they can refer to. (The following official information of popular models is for reference only, and the topic of this article is not specific to specific brands.)

The official fast charge time information of each brand model, the information background is different
Model Definition of fast charging capacity Charging environment supplement Charging time

GAC New Energy-Aion S (Aion S)

2019 Charm 630

30%-80% 100kW charging pile ≤34 minutes
Weimar Motors EX5 Lite Exploration Edition 520 30%-80% Not specified ≤30 minutes
Weilai ES6 2019 420KM benchmark version 0-80% Not specified 0.8 hours
BAIC New Energy-BEIJING-EU7 2019 Yifeng Edition 30%-80% Room temperature 25°C ≤30 minutes
Xiaopeng Motors G3 520 Long Endurance Joy Enjoy Edition 30%-80% Xiaopeng Super Charging Pile ≤30 minutes
Tesla Model 3 Supplement 270 kilometers Tesla Super Charging Pile 30 minutes
Buick blue, connected fashion type PLUS 0-80% Not specified 0.67 hours
Geely Emgrand EV500 30%-80% 60kW charging pile 30 minutes
Sylphy · Pure Electric 2018 Smart Collar Edition Not specified 50kW charging pile 45 minutes
BYD Yuan EV360 Smart Union Yueshang Type 30%-80% Not specified 30 minutes

It is difficult to unify the range of charging and objective conditions

In addition to the subjective factors of “trickle”, at the practical application level, the charging efficiency of pure electric vehicles will be affected by various environmental and equipment factors, including external temperature, vehicle battery temperature, vehicle temperature control system, charging pile power, The impact of power shunting of charging piles, etc., the same vehicle is affected by different environmental factors, and the charging time will vary greatly, so it is difficult to develop a unified information standard.

At present, the power span of electric piles in public charging stations in China is relatively large, ranging from 60kW, 75kW, 120kW to 150kW, and the performance of vehicles under different charging pile powers is also very different. However, even in the environment with the highest power equipment, the charging time will vary greatly due to the peak power consumption in the morning and evening and the shunt caused by too many charging vehicles at the charging station. Therefore, the brand should clearly indicate the charging power when announcing the charging time. Environment, otherwise it is not indicative.

In addition to the electric pile information, information such as vehicle status and ambient temperature should also be noted. In the “Winter Laboratory” we conducted last year, we verified that the charging power of the vehicle is closely related to the environment and battery temperature. Therefore , the official charging time of the vehicle should be matched with the specific environmental background, and clearly indicate what kind of Achieved under temperature.

In the car home EV AH-100 test standard, 30%-80% of the charging time of the vehicle is tested, and the scene is fixed. After the vehicle is driving at high speed, it will be on the National Grid DC charging pile with a power of 120kW in the designated high-speed service area. Carry out the test to ensure that the test state of each vehicle before charging is consistent, and the charging pile equipment is also consistent. Our test also hopes to help users shape a directional charging range reference, but there will be small errors in each test.

However, in real life scenarios, each car owner’s car use habits are different, and the requirements for the starting charge of the car are also different. The car home has always hoped to help users understand in the development of the science and test standards for battery technology. Under charging conditions, a 30%-80% charging cycle is not only more efficient, but also helpful for battery life protection, and this test standard may become a standardized reference for the background of vehicle product parameter information in the future.

Summary: Advocate information transparency, unified reference background

Compared with the range of the vehicle, the charging time efficiency of the vehicle has gradually been valued by consumers in the past two years, and it has become the second most important parameter indicator of new energy vehicles, which indirectly reflects the battery and electronic control of the vehicle. As well as the performance of technical indicators such as chargers, users are also paying more and more attention to the charging time information, which is why the “official charging time” has recently caused heated discussions.

Regarding the “Advertising Law”, it is clearly stipulated that if the performance or function of the product is expressed in the advertisement, an accurate and clear information background should be provided. Therefore, the “official charging time” currently debated by users may be more misunderstood due to insufficient information or unclear conditions, and the brand has just used this to “screw the ball”, and how to regulate the accuracy of the product function information as much as possible Sexuality also requires the joint efforts of the media, brands and industry standards. For example, some of the following methods, can you see if they are approved?

1. The media reports are standardized, and the “official charging time” data of new energy products is tracked more strictly. If the charging background cannot be determined, the report will not be actively reported.

2. Pass the media vehicle test standards, assist the brand to sort out and formulate standardized templates, and provide consumers with more transparent test information.

3. Popularize the knowledge of new energy vehicle charging to allow more consumers to view vehicle data in a reasonable manner and help make car purchase decisions.