How can lithium batteries be applied to low-speed electric vehicles?

Last October, the "four-wheel low-speed electric vehicle technical conditions" national standard was formally established. One of the related policy guidelines was to upgrade the power system from lead-acid batteries to lithium batteries. This guidance has caused great repercussions in the industry. So, what opportunities and challenges will the lithium electrification process of low-speed electric vehicles bring? Will the lithium battery upgrade give low-speed electric vehicle companies a chance to sublimate? This question is worth discussing.

Low-speed electric vehicles switch to lithium battery related requirements:

There are many reasons why low-speed electric vehicles can achieve such a large amount of applications today. On the whole, their prices are limited to 20,000 to 30,000 or lower. This price range is coupled with local loose use restrictions. It is an accelerant for the rapid development of low-speed electric vehicles. If we discuss and compare the requirements for keeping this price range unchanged, we can get an overview of the demand for battery systems for low-speed electric vehicles:

Hard requirements: the total cost of lithium batteries needs to be comparable to existing costs

The performance of the whole system of lithium batteries needs to be compatible with the current system

The supply model of lithium battery systems needs to be similar to the current model

From the perspective of the system structure of low-speed electric vehicles, it is very important to form a stable and relatively simple architecture for each component, if it follows the following architecture:

The supplier of the low-speed car core has already finished the prototype and cost control of the entire system, and then left it to the manufacturer for assembly and construction.

If according to the existing system, the assembly and layout of the lithium battery system must also be relatively simple. For manufacturers, it is more likely to put the battery in place according to the location that can be arranged. The available locations are as follows:

1. Front cabin: The front cabin is equipped with power cells to pay more attention to the structural abuse of batteries (structural intrusion and loss, extrusion and acupuncture, etc.) in the event of bicycle collisions and collisions with other vehicles;

2. Below the seat: The placement of power cells under the seat has more stringent flame retardant and time delay requirements for the upward spread of the battery after fire;

3. The rear cabin is equipped with a power battery.

The rapid development of low-speed electric vehicles has a direct relationship with the simplicity of the entire system and the ready-made core parts system. It can be seen that the scheme of component vendors dominates in terms of control and characteristics.

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