Why do Japanese companies focus on the waste batteries of Chinese electric vehicles?

根据协议，比亚迪负责回收电动公交车、电动出租车等电动车更换的废旧动力电池，性能测试由深圳初创企业pandpower完成并移交伊藤忠商事。

According to the agreement, BYD is responsible for recycling waste power batteries replaced by electric buses, electric taxis and other electric vehicles, and the performance test is completed by Shenzhen start-up pandpower and handed over to Itochu.

该装置可作为电厂的辅助电源，以及光伏和风力发电储能，预计最早将于2021年投入使用。

The device can be used as auxiliary power supply for plants, as well as photovoltaic and wind power generation energy storage, and is expected to be put into operation as early as 2021.

伊藤忠商事希望通过回收电池，在5年内实现100亿日元（约合6.35亿元人民币）的销售额，并表示，如果要获得稳定的利润，离不开中国和比亚迪提供的稳定的商品供应。

Itochu hopes to achieve sales of 10 billion yen (about 635 million yuan) within five years by recycling batteries, and says that if it wants to make a stable profit, it cannot do without the stable supply of goods provided by China and BYD.

事实上，锂离子动力电池的使用寿命很长，平均使用寿命为5-8年。当其容量衰减到额定容量的80%以下时，就不再适用于电动汽车，将被更换和报废。

In fact, lithium-ion power battery has a long service life, with an average service life of 5-8 years. When its capacity decays to less than 80% of the rated capacity, it is no longer suitable for electric vehicles and will be replaced and retired.

特斯拉的锂离子电池

Tesla's lithium-ion battery

除了光伏和风能储存，废旧电池还可以用来为家庭和企业建造小型储能系统。

In addition to photovoltaic and wind energy storage, retired batteries can also be used to build small energy storage systems for families and businesses.

2017年，日产和聆风退休，开始建设家用储能系统。该系统可将太阳能电池板产生的多余光伏储存在业主家中，并接入市政电网，用电高峰时就近调用，降低新建变电站和输电设备的成本，提高当地电网的灵活性。

In 2017, Nissan and leaf retired to build a home energy storage system. This system can store the redundant photovoltaic produced by solar panels in the owner's home, and connect to the municipal power grid, which can be called nearby during the peak of power consumption, reducing the cost of new substation and power transmission equipment, and improving the flexibility of the local power grid.

目前，英国很多家庭和学校都在使用这种储能系统，可以为业主节省高达35%的电费。

At present, many families and schools in the UK are using this energy storage system, which can save up to 35% of the electricity bill for owners.

日本一些7-11便利店也使用丰田普锐斯电池制造的储能设备。一端连接燃料电池发电机和太阳能电池板，另一端连接能源管理系统，为7-11便利店的冰箱、微波炉、香肠炉等设备供电。

Some 7-11 convenience stores in Japan also use energy storage equipment built by retired Toyota Prius batteries. One end is connected with fuel cell generator and solar panel, and the other end is connected with energy management system to power the refrigerator, microwave oven, sausage oven and other equipment of 7-11 convenience stores.

除了储能，退役的动力电池还可以为其他车辆提供动力。

In addition to energy storage, retired power batteries can also provide power for other vehicles.

2018年，日产与住友合作，对日产聆风吉格更换的旧电池进行回收，并将完好的电池重新组装成电动叉车、高尔夫球车等低速电动车的新电池组。

In 2018, Nissan cooperated with Sumitomo to recycle the old batteries replaced by Nissan LEAF jig, and reassemble the batteries in good condition into a new battery pack for low-speed electric vehicles such as electric forklifts and golf carts.

也就是说，目前可用于梯队利用的动力电池暂时不能满足基站更换电池的需求。

That is to say, the power battery that can be used for echelon utilization at present can not meet the demand of base station to replace the battery for the time being.

斯特劳贝尔

JB Straubel

长期以来，动力电池的拆卸和回收有火法和湿法两种方法。

For a long time, there are pyrometallurgy and hydrometallurgy methods to disassemble and recycle power battery.

火法冶金是通过高温燃烧除去不必要的有机物，留下一小部分原材料，如镍和钴。这一过程会损失大量的铝和锂，造成严重的环境污染。

Pyrometallurgy is to remove unnecessary organic matter through high temperature combustion, leaving a small part of raw materials such as nickel and cobalt. This process will lose a lot of aluminum and lithium, and cause serious environmental pollution.

红木材料宣称将火法冶金与湿法冶金相结合，创造了一种新的冶炼方法：首先，利用电池的剩余电能驱动转炉产生高温，采用火法冶金工艺分离电池金属，然后采用湿法冶金工艺回收和提纯各种金属原料。

Redwood materials claims to combine pyrometallurgy with hydrometallurgy to create a new smelting method: firstly, the residual electricity of the battery is used to drive the converter to generate high temperature, the pyrometallurgy process is used to separate the battery metal, and then the hydrometallurgy process is used to recover and purify all kinds of metal raw materials.

日经：比亚迪电动汽车电池回收与伊藤忠商事走向全球

Nikkei：BYD's EV battery recycling goes global with Itochu

连线：在为时已晚之前破解电池回收的竞赛

Wired：The Race To Crack Battery Recycling―Before It's Too Late

空气质量新闻：第二生命电池储能的重要性

Air Quality News：The importance of second life batteries for energy storage

eandt.theiet.org网站：电动汽车、电池和数百万吨废料堆

eandt.theiet.org：EVs, batteries and the multi-million-tonne scrap heap

绿色科技媒体：第二人生：汽车制造商和存储初创公司认真对待电池的再利用

Green Tech Media：Second Life: Carmakers and Storage Startups Get Serious About Reusing Batteries

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update time：2020-12-31 18:58:28