The desire of parents to please the child is understandable, but often the standard characteristics of toy transport limit the experience of the trip. Factory safety settings often “suffocate” the potential of the engine, especially on rough terrain or when climbing a hill. Many owners are wondering how to safely disperse baby-carwithout damaging his electronics.
The modernization process requires a precise approach and understanding of the principles of electrical circuits. A simple intervention in the control system can lead to overheating of the wires or failure of the battery. However, knowing the technical nuances, it is possible to legally and effectively improve the dynamic characteristics of the vehicle.
In this article, we will look at the physical and software methods of speeding up. You will learn about replacing the power cells, reconfiguring the controller and installing additional components. The main thing is to maintain a balance between the desired speed and the resource of the mechanisms.
Analysis of factory restrictions and diagnostics
Before you start taking action, you need to understand what exactly limits the speed of your vehicle. Most often, manufacturers set program limits in the controller or use physical jumpers to reduce voltage. Diagnostics begins with the study of technical documentation and visual inspection of the electrical wiring under the seat.
It is important to determine the type of engine installed. If the construction is used gear-motor With plastic gears, aggressive tuning can quickly destroy the transmission mechanism. Metal gears in the gearbox allow you to operate the transport at higher speeds without the risk of breakdown.
⚠️ Warning: Before any work, be sure to disconnect the battery from the onboard network to avoid short circuit or electric shock.
A multimeter will be required for accurate diagnosis. With it, the voltage is measured at the outlet of the battery and at the entrance to the engine when the gas pedal is pressed. The difference in readings will indicate loss in the circuit or the presence of current limiters. It is also worth checking the status of the contacts, as oxidation can create a false impression of power shortage.
Replacement of the battery with a more powerful
The most effective and relatively safe way to increase speed is to increase the power supply voltage. Standard models often run at 12 volts, whereas replacing the battery with 24 volts gives almost a two-fold increase in power. However, such an upgrade requires not only the replacement of the battery, but also the check of engine compatibility.
When installing a more powerful LiFePO4 batteries or lead-acid analogue, it is necessary to take into account the dimensions of the new element. Often, a standard compartment does not accommodate a battery of increased capacity or voltage, which requires reworking the body or removing the battery into the luggage compartment. It is important to use wires with an increased cross section so that they withstand the increased current.
- 🔋 Check the engine marking: will it withstand double voltage without overheating?
- 🔌 Replace the fuse with an analogue with a large current of operation, corresponding to the new power.
- 🛠 Make sure that the controller supports work with increased voltage, otherwise it will have to be soldered.
- ⚖️ Consider the change in weighting of the car, as new batteries may be heavier than regular ones.
Do not forget that the increase in voltage directly affects the speed of rotation of the engine shaft. If the gear ratio of the gearbox remains the same, the wheels will spin faster, but the load on the plastic parts of the transmission will increase exponentially. It is recommended after replacing the battery to conduct a test start on weight, controlling the temperature of the engine body.
Use lithium-iron-phosphate batteries instead of lead batteries – they are lighter, have a large current output and are not afraid of deep discharge, which is critical for a children’s toy.
Setting up and adjusting the speed controller
An electronic control unit (controller) is the “brain” of an electric vehicle that regulates the power supply to the engine. In many models, the speed limit is implemented through soldered jumpers or resistors on the board. By finding and removing the desired element, you can unlock the hidden potential of the system.
The process requires skills in working with a soldering iron and the ability to read electrical circuits. Usually, the controller board has a marking indicating the function of the contacts. Often it is enough to close two specific contacts or, conversely, cut the track to remove the software speed limit. Be careful: an incorrect action can permanently disable the block.
Technical details of controller soldering
In some controller models, the speed limit is set by a resistor connected to a Speed or Limit contact. Set off this resistor or replace it with a component with less resistance allows the controller to deliver full power. Sometimes, a chip flashing through the programmer is required if physical intervention is not possible.
After the modification of the board, all new connections must be carefully isolated. Vibration when moving on irregularities can lead to the separation of wires or closure. Use a shrink and thread fixer for screws that attach the board to the body.
| Type of modification | Difficulty | Risk of breakdown | Speed increase |
|---|---|---|---|
| Replacement of the lintels | Medium | Low. | 10-15% |
| Replacement of the battery (12B -> 24B) | Tall. | Medium. | 40-60% |
| Chip flashing | Very high. | High-pitched | 20-30% |
| Installation of a new controller | Tall. | Medium. | 50-80% |
Installation of an additional battery in parallel
If the replacement of the main battery is impossible or undesirable due to the dimensions, you can consider the option of installing a second battery in parallel with the main one. This will not increase the voltage in the network, but will significantly increase current output and battery life, which indirectly affects the stability of speed under load.
In parallel connection, it is important that both batteries are of the same type, voltage and, preferably, the degree of wear. Connecting the motley batteries will cause one to charge the other, causing overheating and loss of capacity. For connection, use special connectors that exclude polarity entanglement.
☑️ Secure connection of the second battery
The additional capacity allows the engine not to “suck” the voltage at the time of peak loads, for example, when starting from a place or climbing the curb. This makes the overclocking more sharp and confident. However, keep an eye on the temperature of the wires at the connection points, as the total current can be significant.
Modernization of transmission and wheel pair
The mechanical part also plays a role in the final speed. Plastic wheels often have high rolling resistance, especially on asphalt or tile. Replacing them with inflatable rubber analogues or wheels with EVA coating (foam) reduces friction and allows you to develop a greater speed at the same power of the engine.
In gearboxes of some models, the gear ratio can be changed if the design allows replacing the gears. Installing a gear with a large number of teeth on the engine shaft will accelerate the rotation of the wheels, but reduce traction. Such mechanical tuning It is suitable only for flat surfaces and children with low weight.
⚠️ Attention: Installing larger diameter wheels will change the speed readings and may cause the body arches to touch when cornering or swaying the suspension.
Do not forget to lubricate the moving parts of the gearbox with high-quality lubricant, resistant to washing. Dry or sand-contaminated machinery works with increased friction, taking precious watts of power from the engine. Regular maintenance prolongs the life of nodes after tuning.
An integrated approach combining improvement of the electrical part and reduction of mechanical resistance gives the best and safest result.
Safety Techniques and Final Recommendations
Increasing the speed of a child’s vehicle places a greater responsibility on parents. The braking system is normally designed for factory dynamics, and its efficiency at high speed may not be enough. It is recommended immediately after tuning to check the brakes and, if necessary, strengthen them or install additional ones.
Control the heating of the nodes during the first races. If the engine or controller wires become hot to the touch, operation should be discontinued until the cause of overheating is eliminated. Overheating of the insulation of the wires can lead to fire, and melting of the gears - to jamming of the wheel on the move.
- 👮 Always control the driving process and do not allow children to drive an upgraded car without supervision.
- 🛡 Use protective gear: helmets and knee pads will become mandatory attributes.
- 🚫 Avoid driving on wet grass or dirt where increased power can lead to skids.
- 🔍 Regularly check the tightening of the engine and wheel mount bolts as the vibrations have increased.
Remember that the manufacturer’s warranty is void after any interference with the electrical circuit. All risks associated with equipment breakdown or injuries are assumed by the owner. A sensible approach will make travel brighter while keeping the child safe.
Can you increase the speed without disassembling the body of an electric car?
There are models with external speed switches (usually 3-5 km / h and 6-8 km / h). Check the instructions, it is possible that your car already has a hidden feature activated by a combination of buttons on the pedals or steering wheel. External methods without autopsy are generally ineffective and can be dangerous.
How often should the battery be charged after the power increase?
With increased load and speed, energy consumption increases proportionally to the square of the speed. If earlier the charge was enough for 2 hours, then after tuning the operating time can be reduced to 40-50 minutes. It is recommended to charge the battery after each use, without waiting for a full discharge.
Will the engine burn when you install a 24V battery instead of a 12V?
DC motors often have a margin of safety, but prolonged operation at double voltage without load (by weight) or when jamming the wheels will lead to overheating of the windings and the collector. It is critical not to keep the gas pedal squeezed out if the car is stationary and to monitor the temperature of the engine body.