Ding Xikun: "Technical Plan for Top Replacement of Electric Heavy Trucks"

New infrastructure, new opportunities, and new development, on July 9, the "2020 Sixth China International Electric Vehicle Charging and Swapping Industry Conference" (referred to as: BRIC Charging Forum) hosted by China Charging Pile Network ) grand opening at Holiday Inn Shanghai Dahua Hongqiao. 850 representatives from governments, schools, associations, enterprises, purchasers, finance, media, etc. attended this conference. The conference promoted industrial exchanges with the theme of "Insight into the present, foresee the future, focus on development, and cooperate to win". develop.

New infrastructure leads a new wave of development

Ding Xikun, general manager of the battery replacement business department of Shanghai Jiuxing Energy Technology Co., Ltd., delivered a keynote speech on "Technical Solution for Top Replacement of Electric Heavy Trucks". The following is Unabridged transcript of the speaker:

Ding Xikun, General Manager of the Battery Replacement Division of Shanghai Jiuxing Energy Technology Co., Ltd.

I have drawn up a few topics myself, and today I would like to start with these topics for heavy trucks Let’s have some discussions with you from this perspective.

Why do electric heavy trucks need to be replaced? Why do we use the hoisting power replacement mode instead of the ordinary side power replacement mode? In addition, in the progress of hoisting power swapping, what products has Jiuxing made? Let’s talk about the scenarios and project management of hoisting power swapping. If you have time, give a brief introduction to Jiuxing.

Why did I abandon the traditional side-side battery swap in the field of heavy truck battery swap? Because we first started making commercial vehicles by replacing batteries on the side of buses, and at this time we began to use top-mounted battery replacement. In the picture on the left, Jiuxing launched an actual side-to-side power swapping station in 2018, and on the right is an experimental station for hoisting power-swapping launched in 2019. We know that side-swapping batteries require a robot on each side of the beam. The main features are Two large batteries plus two power swapping equipment on the left and right; the top ceiling power swapping may be a battery that may be placed behind the driver's compartment in the trunk, and a hoisting device above completes the task of extracting the battery.

I would like to share with you some of the characteristics of sideways power swapping and hoisting power swapping from several dimensions such as technical difficulty, reliability, power swapping station cost, floor space, and power swapping time. .

When we change the battery from the side, no matter the pull-out method is used at first, we always pull out the side of the battery, and put the battery on the charging rack for charging by rotating and lifting, so that the equipment is relatively stable. It is said that the requirements for the entire vehicle are relatively high. The entire vehicle must be kept level. Affected by the tire pressure, if the battery weighing two to three tons is removed, the posture of the entire vehicle will also change relatively greatly. This will increase the success rate of battery replacement for the equipment. Or the technical requirements are relatively difficult, and the reliability of the entire technology is relatively not that high.

If you use hoisting and top-mounted power replacement, this is too common. The technology is relatively mature. Ordinary workshops use cranes and cranes. This technology is relatively simple and the reliability is relatively high. , the cost is still relatively low.

From the perspective of floor area, the side-mounted power swap station is expected to be basically larger than about 300 square meters, while the top-mounted power swap station is less than 200 square meters.

From the perspective of battery replacement time, relatively speaking, the side time is slightly longer. This is why Jiuxing chose hoisting for battery replacement because of its mature technology, high reliability and low cost.

The following are some attempts made by Jiuxing in the entire hoisting battery swap. This product is called a power battery box assembly. When I defined the product for the team, I had two requirements: 1. This The product should not place too many requirements on the car. You can let the car factory get it and use it like standard parts; 2. This product must be compatible with multiple models and battery packs of multiple specifications.

At this time we saw the picture on the right. The upper part is the standard replacement power battery box assembly, and the side is the bottom drag assembly. There is no need to change the structure of the car beam, and the upper part is ensured to be unified. In this way, my battery swapping station can basically be compatible with various models. Whether it is a mixer truck, a mechanical truck, or a tractor, I am basically compatible with the frameworks of various electronic manufacturers.

In addition, this framework has an advantage. According to different scenarios, sometimes the battery is selected to be higher, and sometimes the battery is lower, because it ensures that the top does not move, and it is compatible if it is taller or shorter. The OEMs currently using this product include Jiefang, Foton, Hongyan, Beiben, Dongfeng, Valin, etc. They are all the top OEMs now using this product. If they have electric replacement models.

The reliability of this product is actually a huge challenge, including the reliability of the electrical connection. We conducted full analysis at the beginning of the design and passed the national standard test. In addition, after the model was completed, the actual vehicle ran 10,000 kilometers of testing at the Xiaogan Proving Ground, thus ensuring the reliability of the market launch. There are probably nearly 500 electric heavy trucks of this product in operation on the market.

This is an actual test we did at Xiaogan Military Field. After running for 10,000 kilometers, it is basically equivalent to the strength of 500,000 kilometers of ordinary roads. After running, whether it is the strength of the frame or the reliability of the connection, performance, as well as the stability of the electrical connection, and basically there are no abnormal phenomena.

I would like to mention that the fourth generation of Jiuxing is this battery swapping station (see picture). We do battery swapping for heavy trucks, and it is difficult to adjust the vehicle like a passenger car. Since it is difficult to adjust, I will not adjust it. As you can see, the entire entrance to the car in my battery swapping station is a flat surface with nothing, no positioning, and nothing else. To find the position of the battery, we must find the positioning point accurately. Adaptive technology.

At this time, we are replacing the battery on the top. Through the adaptive floating device, we can accurately find the position of the battery; in addition, this is an arc-shaped roof design, with wind resistance up to 14 levels. According to different Depending on the number of vehicles serving the scene, the battery swapping station is a matter of being longer or shorter. In fact, the battery swapping time is about 3 minutes, and the battery swapping power has been completed for 36,000 actual battery swapping trips. The success rate of swapping stations is almost 100%. The floor area is because depending on the length of the battery swap station, the equipment covers an area of ??120 square meters to 180 square meters.

In terms of application scenarios and cases, Mr. Yang has just given a very detailed explanation. Let me talk about the Beijing Green Mine Intelligent Power Swapping Heavy Truck Project. Currently, 1 power swap station has been operated and 3 battery swap stations have been built. There are 200 vehicles on order, and 30 heavy-duty trucks have been operated safely for more than 1 million kilometers. Through the battery swap mode, the daily operating mileage of the vehicles can reach 800 kilometers, which is comparable to that of fuel vehicles.

The following is an introduction to Jiuxing, Shanghai Jiuxing Energy Technology Co., Ltd.

It was established in Shanghai in 2014; in January 2016, it was responsible for the automated power swap station system of Shanghai Yangshan Phase IV deepwater terminal. The project (Big Power Heavy Equipment) was one of the top ten projects in Shanghai in 2016 and received the Shanghai Zhangjiang National Independent Innovation Special Development Fund; Shanghai State Power Investment Group Company became a shareholder in August 2018; Shanghai Jiuxing entered the field of electric heavy-duty truck battery replacement; in September 2018 In March, it jointly established Harbin Transportation Group Tongyuan Power Supply Co., Ltd. with Harbin Transportation Group; in October 2018, it signed a strategic cooperation agreement with the Guiyang Municipal Government to build Jiuxing Guizhou production and testing base; in January 2019, it entered into cooperation with 8 companies including the State Grid The State Grid Smart Energy Transportation Technology Innovation Center was jointly established; in March 2019, the country's first smart electric heavy-duty truck power swap station independently developed by Jiuxing was officially released, and won the "Shanghai High-end Intelligent Equipment, the First Breakthrough Special Project"; in 2019 In June, it jointly established the Fusion Jiuxing Travel Company with State Power Investment Corporation to conduct vehicle rental business; in October 2019, Jiuxing invested in the construction of Shanghai's largest public charging station "Bao'an Highway Station" and put it into operation; in December 2019, the world's first modular The smart heavy-duty truck power swap station commercial demonstration project was officially delivered and put into operation; in December 2019, Jiuxing successfully entered the core application supplier list of China Southern Power Grid Electric Vehicle Service Company; in February 2020, Jiuxing successfully entered the core supplier list of State Grid Electric Vehicle Service Company; In April 2020, the first dedicated charging station for airport taxi parking lots in China, the SPIC "Jiuxing Charging" Hongqiao Airport charging station was officially put into operation.

Jiuxing currently has three major businesses, one is the charging business, and the second is the battery replacement business. The battery replacement business department is the business department I am now in charge of. There is a taxi operating company called the travel business.

This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.