How can you tell if an electric bike is good or bad

Affected by the development of battery technology, at present, electric bicycles have a maximum driving range, generally 30 kilometers to 50 kilometers, so the purchase of electric bicycles must have a clear purpose: that is, as a means of transportation to and from work, do not be too demanding.

The formula for calculating the maximum driving range is: Maximum driving range > = total commute distance x

Electric bicycles are 24V12Ah, 24V14Ah, 36V12Ah and other battery packs according to the selection. Among them, the maximum mileage of the 24V12AH battery pack is 25 km and 30 km, which can meet the needs of users within 15 km of daily commuting distance, and users above 15 km should choose 24V14Ah and 36V12Ah battery packs.

Expensive, luxurious-looking cars don't necessarily perform better than relatively cheap, simple-looking cars.

The key to determining the quality of an e-bike is the quality of the motor and battery. The high-quality motor has low loss, high efficiency, long driving range, and is good for the battery; As for the battery, it is almost the deciding factor in the quality of an e-bike. The electric bicycles sold on the market are basically maintenance-free lead-acid batteries, which have the characteristics of low performance, excellent electrical performance, no memory effect, easy to use, etc., and the service life is basically 1 2 years.

The more reliable brand of automotive battery pack that I can introduce to you is Shenyang Panasonic's lead-acid battery, which can basically be used with confidence, and I don't know much about other manufacturers' batteries. Closely related to the battery life is the choice of charger, I have not found a particularly perfect product so far, so I can only recommend that you use the original charger.

4.Brand: Because the electric bicycle is a group of batteries used in series, therefore, the group of batteries must be strictly selected to ensure the consistency of each battery, in order to ensure the performance of the entire battery pack.

Otherwise, the less performing batteries in the group will quickly fail, and the consequence is that your bike may only be on the road for a month, and it is time to replace the battery. Testing the consistency of the battery requires a more expensive set of equipment, and the general small manufacturers do not have these conditions, so without understanding the e-bike and battery technology, you should try to buy famous brand products from large manufacturers.

5.Now it is common to see people riding electric bicycles on the street with a child, and it should be said that this is a certain damage to electric bicycles. If you must bring people, you must only bring children under the age of 10 who are not too heavy, otherwise, the life of the motor may be greatly shortened.

1. See if there is 3C certification.

First of all, the front of the car is pasted with the 3C certification logo in black letters on a silver background, and there is a metal nameplate on the right side of the underbody, which is engraved with the model number and production date of the car.

Second, look at the certificate.

Each e-bike on sale includes an A4 size e-bike certificate. In addition to the production date and model of the car, it also contains the basic parameters of the car, including its spare parts information and the number of the 3C certificate. The 3C certificate can be queried through the China Quality Certification Center, and if you can't find it, you can buy a fake new national standard electric car.

Third, look at the battery life.

There is a limit to the maximum speed of an electric vehicle, but there is no limit to the range. When choosing an electric vehicle, the first thing to consider is the range. Generally, it is advisable to use 48V20Ah lithium battery national standard car and 48V12Ah lead-acid battery, the former has a long range, and the general pure electric can run to more than 60km, and the latter is affordable and has a medium battery life, which can meet the basic needs of transportation.

Fourth, check accessories.

The strength requirements and performance requirements of e-bike parts should be higher than those of bicycles. When purchasing, the user should look at the quality of the parts selected for the whole vehicle, such as: whether the welding and surface defects of the frame and fork, whether the manufacturing of all parts is excellent, whether the double support is strong, whether the tires are brand-named, whether the fasteners are rust-proof, etc.

It is the life of the battery, and it also depends on whether the electric car is power-saving. One looks at the battery, the other looks at the motor. The battery power is good, the running time is long, remember that you have to look at it when he installs it for you, don't let him load things less, the motor mainly looks at the warranty, and it must be durable.

Supplement: Generally, the motor is three thick wires, two west wires, the greater the power, the better, and the running is strong and durable, but it is generally recommended to be about 350 smaller, which is also good for your battery.

Measure the voltage of a single battery in the whole group first, and the error should not exceed If it does not exceed, there is basically no problem with this group of batteries, but the possibility of a problem is not ruled out.

Whether the battery loses power or not, it depends on the voltage, basic 100, 90, 80, and so on, the battery voltage is at 11 o'clock, a few V, it must be a loss of power, and there are also many deeply discharged batteries with a voltage of 7A few 8A few such batteries can be repaired, the capacity can be restored, and the deep discharge time is long, such batteries are definitely useless, so we must avoid the loss caused by the factors.

To see whether it is produced by a genuine factory or an OEM factory, the main thing to distinguish is to look at the handlebar, reflector, instrument, motor, brake handle... Whether it is marked with the trademark of this brand, if there is one, it is produced by a genuine factory, otherwise it is OEM.

There are several ways to distinguish the quality of the battery: 1 When buying a new car, all merchants will not agree that you disassemble the shell to see if the battery is original or refurbished, and the authenticity can only be found after a few days of use

The performance and specifications of battery cars produced by various manufacturers are not uniform, and the differences are large, so they cannot be generalized. 》2: The new battery is more durable when it starts after sufficient power, and the refurbished battery can not do the above two points, which should be felt by yourself in use, 3:

You can also disassemble the shell of the battery (very simple) to check, the original regular manufacturer of the battery must have three kinds of identification, the manufacturer's name and address, inspection, inspection and sealing, all of which are indispensable, otherwise it must be a miscellaneous or refurbished counterfeit product. Another: When you buy a new car, you must provide a three-pack contract and indicate the shelf life, mainly the three packs of batteries, inverters, and motors.

1. When consumers buy electric vehicle products, they should first consider whether the product can meet the quality and performance requirements, and then see whether it is suitable. Five principles and precautions for buying an electric bicycle:

1. Look at the brand of electric bicycles: There are many brands of electric bicycles at present. Consumers should choose brands that have been in business for a long time, have a low return rate, and are reputable.

2. Heavy service: Because the current electric vehicle components are not yet universal, the maintenance can not reach the socialization, so the purchase of electric bicycles must pay attention to whether there is a special maintenance service department in the region, if the picture is cheap and ignore the after-sales service, it is easy to be fooled.

3. Select models: Electric bicycles can generally be divided into four types: luxury, ordinary, front and rear shock absorbers, and lightweight. The luxury type is complete, but the ** high ordinary type has a concise structure, economical and practical Lightweight type is light and flexible, but the itinerary is short.

4. Check accessories: The strength and performance requirements of electric bicycle parts should be higher than that of bicycles. When purchasing, users should look at the quality of the selected parts of the whole vehicle, such as:

Whether there are defects in the welding and surface of the frame and fork, whether the manufacturing of all parts is excellent, whether the double support is strong, whether the tires are brand-named, whether the tight parts are rust-proof, etc.

5. Consider the continuation mileage: a group of new batteries with a capacity of 48V 12 The mileage is generally about 40 kilometers, and the longest distance of riding every day is generally about 25 kilometers (due to road conditions affecting the actual continuation of the mileage), and the longest distance of riding every day is more than 40 kilometers, it is necessary to be filial to whether there is the possibility of charging twice in a day. If you don't have this possibility, it's not suitable to buy an electric bike.

Second, four key points when buying an electric bicycle:

1. Check the appearance to see whether the surface of the paint and electroplating parts is in good condition.

2. Operate the actual operation according to the manual and check the working status of the whole vehicle. The speed transition should be smooth, there should be no impact at the start, the wheel rotation should be flexible and there should be no sense of stagnation, the wheel rotation sound should be soft, there should be no abnormal noise, the brake should be moderately tight, and the braking should be reliable.

3. Also check whether the auxiliary functions of the model (such as power display, speed, mileage display, etc.) are in a normal state.

4. Whether the supporting accessories, chargers, grid certificates, manuals, and warranty cards of the vehicle are complete.

The quality of electric vehicles depends on several aspects:

1. Appearance problems. The craftsmanship and level of the paint directly affect the first look of this car. The materials used for baking lacquer include primer, topcoat and varnish. Different brands of paint directly affect the final result.

2. The quality of the frame. The quality of the frame directly determines the safety performance of the whole vehicle. First of all, observe the welding level of the frame inside the plastic parts of the vehicle, if there is false welding and desoldering, it means that the quality of the frame is not ideal. Secondly, observe the frame for signs of rust.

3. Shock absorption. Riding on an electric car, accelerate quickly to the maximum, and then suddenly brake forward, the front shock absorber will be immediately compressed because of the vehicle's own inertia, at this time, both hands hold the brake and press down the body with the shock absorption, feel whether the shock absorption is in the end, if the shock absorption is in the end, it means that the shock absorption effect is very poor, and the quality of the front shock absorption is not good.

4. Battery. Choosing a battery through the brand can effectively avoid bad batteries fishing in troubled waters. Tianneng and Chaowei are both listed companies in the battery industry and are reliable battery brands.

Cons:The distance is on the short side. The suitable use distance of electric bicycles is within a radius of 30 kilometers (because it is necessary to consider round-trip), the road is too far, not suitable for electric vehicles, the bearing capacity of electric vehicles is significantly smaller than that of small displacement motorcycles, the frame is thin, the braking force is weak, the safety is extremely low, and it is not suitable for driving with high intensity.

Pros:It can achieve zero emissions and do not pollute the atmosphere. For the same 100-kilometer journey, cars generally need 5-15 liters of gasoline, and motorcycles also need 2-6 liters of oil, but electric bicycles only cost about 1-3 kilowatt-hours of electricity.

In the context of the growing energy crisis around the world, electric bicycles are a very rational choice.

Precautions for electric vehicles.

Never let the battery stay in a state of low power 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).

When the electric bicycle is just started, it is necessary to use the pedal (if there is no pedal, you can push the ground with the foot) to help start, and when going uphill, use the pedal to help the electric vehicle go uphill, so as not to damage the battery due to excessive discharge current.

1. If you find that the electrodes of the battery have white or blue-green powdery crystal accumulation, use a wire brush and sodium bicarbonate solution to clean the electrodes in time to ensure that the electrodes and cables are in good contact.

2. Check whether the battery is safely fixed on the battery rack, if there is looseness, tighten the fixing bolts, excessive shaking will shorten the service life of the battery.

3. Regularly check whether the electrolyte in the battery is reduced, if necessary, add distilled water, but do not excessively, the normal liquid level height should reach the bottom of the water injection hole.

4. Check whether the battery wire is tightly connected to the electrode, as loose joints will cause the car to fail to start.

5. Carefully inspect the shell of the battery, if the battery has cracks, it needs to be replaced in time to prevent corrosive electrolyte leakage.

Members of the China Electric Vehicle Alliance answered: about the quality of electric vehicles, the key lies in the battery and motor of the electric vehicle, the battery of the general electric vehicle can be the power of the battery and the length of the problem, for example: Chaowei battery and Tianneng battery and Shanshui battery quality is enough power, long use time.

About the motor detection is to use the car can hear the sound of the motor starting, if it is a very large and not very coherent sound: "shhhhhh About the exterior of the electric car ** its appearance of the fine, some electric car shell is very rough, at first glance does not look like a good car, such a car shell is easy to fade and crack, I now recommend a few brands to you, ha is our alliance members to conduct market research, users use all say good cars, their after-sales service is still very good, *** brand cars have:

Xinri, Emma, Lion Dragon, Luyuan, Wang Pai, Good Rabbit, Yamaha, Taixiang, etc.

The battery is the most critical, and then the motor, the motor should be brushless. **Bicycle style is generally around 1,008. The cheapest motorcycle style is also more than 2,000.

The manufacturer is not the same, and the ** is not the same. If you want to buy, you can buy a well-known manufacturer of famous brands, and the quality is good, and the after-sales service is also good. Don't feel sorry for the hundreds of dollars when you buy them.

If you buy an electric car from a miscellaneous brand or a small manufacturer, the battery and motor they use are definitely not good, and the service life is short, then you are spending more money. Be sure to think about it before buying, read more and ask more, and don't make a decision lightly. I wish you all the best in your electric car.

Style selection. 1. There are three main driving modes of electric bicycles: one is hub drive, one is mid-drive, and one is suspension drive. Electric bicycles on the market are mainly driven by wheels, and hubs are better at back-wheel drive, and front-wheel drive performance is relatively poor.

2. The placement position of the battery, from the balance of the whole vehicle and the convenience of getting on and off the car, it is better to place the battery in the position of the frame inclined pipe or riser, and the configured battery is basically an economical lead-acid battery. At present, most electric bikes use 36V12AH lead-acid batteries; The 24v12ah battery has a shorter driving range due to the shorter driving range.

Functional style selection.

1. Standard type: The motor power of this type of electric vehicle is generally 150W, which is characterized by simple and smooth shape, continuous mileage of 40km 50km, easy to operate, and is more suitable for users with long commuting distance and certain mobility in work and life.

2. Multi-functional type: This kind of electric vehicle is generally based on the standard type to add fork suspension, saddle suspension, headlights, electric horns, etc., it is characterized by more functions, more comfortable when riding, and more convenient to use at night.

3. Luxury: This type of electric vehicle is characterized by a relatively novel and luxurious shape, more complete functions, usually on the handlebar to add a dashboard to display speed, mileage, voltage, power, etc., some are also equipped with turn signals, language prompts, rearview mirrors, toolboxes, safety nets, etc.

Specification selection. Electric bicycles are generally more than 610mm, and at present, manufacturers have designed and manufactured 660mm or 560mm electric bicycles to meet the needs of consumers at different levels.