How to change lithium batteries for electric vehicles: Analysis of hot topics across the entire network and practical guide
In recent years, with the maturity of lithium battery technology and the improvement of environmental awareness, more and more electric vehicle users have begun to consider replacing traditional lead-acid batteries with lithium batteries. This article will combine popular topics and hot contents across the network for the past 10 days to analyze in detail the feasibility, steps and precautions of modifying lithium batteries in electric vehicles, and provide structured data for reference.
1. Why choose lithium batteries?
Compared with lead-acid batteries, lithium batteries have the advantages of high energy density, light weight and long life. Here are the comparison data of the two:
| Comparison items | Lithium battery | Lead acid battery |
|---|---|---|
| Energy density (Wh/kg) | 100-265 | 30-50 |
| Cycle life (times) | 500-2000 | 300-500 |
| Weight (same capacity) | 30%-50% light | Heavier |
| Price (same capacity) | Higher | Lower |
2. Steps to modify the lithium battery
1.Assess the requirements: Calculate the capacity of the required lithium battery (such as 48V20Ah) based on the power of the electric vehicle and the daily driving range.
2.Select a battery type: Currently, mainstream lithium batteries are divided into lithium iron phosphate (LiFePO4) and ternary lithium (NCM/NCA). The former is more secure, while the latter is more energy density.
3.Adapt controller: Some old electric vehicles need to replace or adjust the controller to match the discharge characteristics of lithium batteries.
4.Integrated Battery Management System (BMS): BMS is the key to the safe use of lithium batteries, and it is necessary to ensure that it has overcharge, overdischarge and short-circuit protection functions.
3. Answers to popular questions on the entire network
According to the search data of the entire network in the past 10 days, the top 5 issues that users are most concerned about are as follows:
| Ranking | question | High frequency keywords |
|---|---|---|
| 1 | Is it legal to modify lithium batteries? | Regulations, filing, traffic police |
| 2 | How much can the battery life be improved after modification? | Mileage, capacity, actual test |
| 3 | How much does the modification cost? | Budget, cost-effectiveness, brand |
| 4 | Will there be a risk of spontaneous combustion? | Safety, temperature, protection |
| 5 | Which brands of lithium batteries are reliable? | Evaluation, reputation, quality assurance |
4. Precautions and suggestions
1.legality: Some regions in my country require that electric vehicle battery modifications need to be registered, and it is recommended to consult the local traffic management department in advance.
2.Safety first: Choose a lithium battery pack with BMS and avoid buying disassembled batteries or used batteries.
3.Professional installation: It is recommended to complete the modification by qualified maintenance points to avoid line failures caused by self-operation.
4.After-sales guarantee: Priority is given to brand products that offer a minimum warranty of 2 years and retain the purchase certificate.
5. Recommended mainstream lithium battery brands in 2023
| brand | Core advantages | Reference price (48V20Ah) |
|---|---|---|
| Tianneng Lithium | Domestic old brand with many after-sales outlets | 1500-1800 yuan |
| Super Lithium | Lightweight design with long cycle life | RMB 1600-2000 |
| Xingheng Power | Lithium manganate technology, high safety | 1800-2200 yuan |
| CATL | Automotive-grade battery cell with stable performance | 2000-2500 yuan |
Conclusion
The modified lithium battery of electric vehicles is a systematic project that requires comprehensive consideration of technology, safety and regulations. It is recommended that users fully understand relevant knowledge before modification, choose formal channels to purchase products, and install and debug through professionals. Reasonably modified lithium batteries can not only improve the riding experience, but also extend the overall service life of the electric vehicle.
(Note: The data statistics period in this article is from October 1 to 10, 2023. The price information is for reference only. The specific price is subject to the quotation of the maker merchant)
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