1. Check to see if there is 3C certification

First of all, there is a 3C certification mark with black characters on a silver background affixed to the front of the car, and there is a metal nameplate on the right side of the bottom of the car, which is engraved Stamped with the car model and production date.

2. Look at the certificate

Every electric bicycle sold on the market contains an A4-sized electric bicycle certificate. In addition to the production date and model of the car, it also contains the basic parameters of the car, including its accessory information and the number of the 3C certificate. The 3C certificate can be checked through the China Quality Certification Center. If it cannot be found, you have bought a fake new national standard electric vehicle.

3. Look at the battery life

The maximum speed of electric vehicles is limited, but the cruising range is unlimited. When choosing an electric vehicle, the first priority is the driving range. Generally, 48V20Ah lithium battery national standard car and 48V12Ah lead-acid battery are suitable. The former has a long range and can generally run more than 60km on pure electricity. The latter is affordable and has a medium range, which can meet basic transportation needs.

4. Check accessories

The strength and performance requirements of electric bicycle parts should be higher than those of bicycles. When purchasing, users should look at the quality of the parts selected for the vehicle, such as: whether there are defects in the welding and surface of the frame and front fork, whether all parts are manufactured in good quality, whether the double supports are strong, whether the tires are of famous brands, and whether the fasteners are Whether it is rust-proof, etc.

Extended information:

Battery car maintenance methods:

1. It should be fully charged before use. Newly purchased electric vehicles should be fully charged before use. Because many electric vehicles have been shelved in stores for several months, or even more than half a year, they must be fully charged before use. It is best not to use them immediately after being fully charged, but to let them sit for about ten minutes.

2. The battery must be firmly installed on the electric bicycle. Remove the battery for charging. When installing, the battery must be firmly installed on the electric bicycle to prevent the battery from being damaged by vibration while riding. When transporting the battery, it is prohibited to throw, roll or press it heavily.

3. Keep the battery dry and clean. Always remove dust and dirt from the battery cover and keep the battery dry and clean to prevent the battery from self-discharge.

4. Develop a good habit of charging the battery every night. Never leave the battery in a low-power state for a long time, and develop a good habit of charging the battery every night. If not used for a long time, it should be fully charged, placed in a cool and dry place, and charged regularly, usually 10 days.

5. Use the pedal when starting. When an electric bicycle is just started, you need to use pedals. If there are no pedals, you can use your feet to push the ground to help start. When going uphill, use pedals to help the electric bicycle go uphill to avoid excessive discharge current and damage to the battery.

6. Do not allow the battery to be over-discharged and charge it frequently. When riding, be careful not to over-discharge the battery. After the battery is discharged to the cut-off voltage, continuing to discharge is called over-discharge.

7. Do not unlock the lock for a long time when the battery is discharged, and turn it off immediately when not in use.

8. Avoid overcharging. Stop charging when the charger shows that it is fully charged. Do not charge overnight or even for several days. Overcharging will cause the plate active material to harden and fall off, causing water loss and battery deformation.

9. Avoid long-term power loss. Long-term power loss will cause the plates to be vulcanized. In low temperature conditions, charging mainly involves problems such as poor charging acceptance and insufficient charging, resulting in battery loss. Insulation and anti-freezing measures should be taken at low temperatures, especially when charging, they should be placed in a warm environment to ensure adequate charging, prevent irreversible sulfation, and extend the service life of the battery.

10. Prevent short circuit. Special care should be taken during installation or use. The tools used should be insulated. When wiring, electrical appliances other than batteries should be connected first. After checking that there is no short circuit, the battery should be connected last. The wiring specifications should be well insulated to prevent overlapping pressure. rupture.

11. Each startup time cannot exceed 5 seconds. Avoid long-term high-current discharge of the battery, which will greatly damage the internal structure of the battery. It is recommended that car owners should not start the vehicle for more than 5 seconds each time. It requires two consecutive starts, with an interval of 10 to 15 seconds.

12. Avoid exposure to the sun. Exposure to the sun will increase the temperature of the battery, increase the activity of each active material in the battery, and affect the service life of the battery.

13. The discharged battery should be recharged in time and should not be left aside for more than 12 hours.

14. Check and adjust the front and rear brakes. The front and rear brakes of an electric bicycle should be checked and adjusted before use. The front brake is controlled by the right brake lever, and the rear brake is controlled by the left brake lever. It is appropriate to adjust the front and rear brakes so that the brakes can be reliably braked when the left and right brake handles reach half their stroke. If the brake pads are excessively worn, they must be replaced in time.

15. The lubrication of the chain should be checked before using an electric bicycle. Feel and observe whether the chain shaft of the chain rotates flexibly and whether the chain links are severely rusted. If it is corroded or cannot rotate flexibly, add an appropriate amount of lubricating oil. In severe cases, the chain should be replaced.

16. Before riding an electric bicycle, you should check the tire pressure, handlebar steering flexibility, front and rear wheel rotation flexibility, circuit, battery power, motor working condition, lights, horn, etc.

17. The standard load capacity of electric bicycles is 75 kg, and overloading should be avoided as much as possible.

18. When using an electric bicycle in cold weather, you should try to drive it manually or electrically, and you should also pay attention to the battery power and voltage indication. Generally, when the weather is cold, the depth of discharge of the battery should be appropriately reduced, and driving under low voltage must not be carried out. This is because the battery's charging and discharging capabilities are reduced when the weather is cold.

19. Electric bicycles should be stored in a cool, ventilated, dry place, away from corrosive liquids and gases. When storing, the entire vehicle should be upright, the tire pressure should be sufficient, and no heavy objects should be loaded on the vehicle body. Batteries should be stored separately.

Ifeng.com-Don’t know how to choose the new national standard electric vehicle? Don't panic! You can buy it if you meet these points

Baidu Encyclopedia-Battery Car