Hybrid Repair Shop

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Hybrid Repair Shop2019-09-17T20:06:08+00:00
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Hybrid Repair Shop & Maintenance

This inverter unit controls the electrical power flows to and from the batteries, the electric motors, the generators and the AC air compressor for Hybrid air condition 
The Toyota inverter unit contains 2 inverter circuits and a converter / voltage controller.
The power inverter converts the DC voltage of 201.6 volts to an alternating voltage of 500 volts for the electric motor. The small inverter provides the Hybrid AC compressor power supply for Prius  air conditioning. The DC / DC converter takes care of the 12 Volt for the battery.


How does the Power converter / inverter look inside? To give you an idea, here are two pictures of the Prius 1 converter / inverter


 The Hybrid Battery

The THS II Prius Hybrid battery is of nickel metal hydride type (NiMH).
This is a extremely powerful  hybrid battery has a weight of almost 100 lbs
Toyota hybrid battery currently has the highest power density among hybrid batteries

The Prius HV battery consists of:

28 Modules
6 Cells per Module
168 Cells Total
1.2 Volts per Cell
201.6 Volts Total
6.5 A / H (3h)

The HV battery is placed on the bottom plate above the rear axle of Prius. The charging level of the HV battery is held by the computer system between 40% and 80%, which means that Toyota follows a car alarm. There is therefore a full factory warranty of 8 years.
The lifetime of the HV battery in the Prius has been tested in various ways by means of lifetime simulations, but in practice.
The HV battery has been tested at taxi companies in Japan, Sweden and Canada.

Toyota Prius Charging level indicator 

The charge level of the HV battery is maintained by the control software at a level between 40% and 80%. As an indication for the current level, an icon in the energy plate is placed on the central display. This icon indicates the level between 40% and 80% by means of bars. There is also a color indication.


Green is above the norm – The computer system will limit the charging of the HV battery, also limit regenerative power generation and even completely stop at the highest permitted charging level. As far as possible, energy will be extracted from the battery for the drive.

Blue is within the norm – All regenerative energy can be discharged towards the HV battery and the battery can and can provide maximum power for the drive.

Pink is below the standard – The withdrawal of power from the HV battery for the drive is limited and completely stopped at the lowest permissible level.Also, the combustion engine will no longer switch off, but ensure a charging current through the generator to the HV battery.

In an intermediate phase, both electrical power can flow to the HV battery and to the electric motor for the drive.This process is regulated using a number of parameters, such as generated electrical energy (MG1), energy required for the HV battery (charge level), NiMh temperature and required electrical energy for the drive (MG2).

prius battery charge indictor


Prius 12 volts battery


The Toyota Prius has a 12V – 35 Amp / hr lead / cadmium Battery, this battery provides the power supply of the control, control and control systems.This battery is in the luggage compartment and is not just auxiliary battery but essential for the proper functioning of the Prius.
The auxiliary battery is charged from the HV battery via the converter. Loading starts when the hybrid system is started via the Powerbutton. The combustion engine does not need to be in operation for this purpose. 

The Prius Inverters / Converter

Power Inverter The power inverter of the Prius is an electrical converter that converts the DC power of the HV battery and the AC voltage of MG1 and MG2. The inverter consists of two 3-phase bridge circuits, one for MG1 and one for MG2, each circuit consists of 6 power pulses and converts the DC power of the HV battery into a three phase AC voltage and the alternating AC voltage of MG1 and MG2 in a Direct voltage. The activation of the power transistors is controlled by the HV-ECU. This sends a control signal to the power transistors. In the inverter there are a number of sensors / sensors that send information about the supplied power, voltage level, temperature to the HV-ECU. The inverter in the Prius II is also equipped with a voltage amplifier circuit which increases the input voltage (201.6 volts) of the HV battery to an output voltage of up to 500 volts for MG2. The inverter controls the voltage level based on the power requested by the HV-ECU between 201.6 volts and 500 volts, thus keeping the current to MG2 equal. The inverter produces quite a lot of heat during these control operations, so that it must be cooled by a separate and internal cooling circuit together with MG1 and MG2.



 There is also a separate second and smaller inverter circuit, this circuit converts the 201.6 volt DC power from the HV battery to a 201.6 volt AC voltage for the air conditioning compressor.


The Hybrid Converter

 The Prius II converter is placed in the lower part of the compact housing. The converter is responsible for converting the 201.6 volts DC from the HV battery to 12 volts DC for the charging of the auxiliary battery

The 201.6 volts are initially converted by a power transistor bridge cc to 201.6 volts AC, then transformed to a lower voltage by a transformer, then converted into and DC voltage by a rectifier circuit.
The converter also controls the function of the voltage regulator, the voltage level of the auxiliary battery, is controlled and maintained by the converter. The charging of the auxiliary battery is thus not dependent on the incineration of the internal combustion engine. The charging of the auxiliary battery begins when the hybrid system is activated using the power button.

Toyota Hybrid Battery

A closed NiMh battery is mounted for the power supply of the drive via the MG2 electric motor. The HV battery is placed in the rear area on the bottom plate above the rear of the Prius. The battery is equipped with a separate cooling system with fan and is cooled from the interior with suction air. The closed NiMh battery of the Prius II is loaded by MG1 and the regenerative brake system (MG2).

Battery and Ecu charge levels and condition of the HV battery are monitored. Battery-Ecu receives various status signals from the HV battery, such as the battery temperature, outdoor temperature, voltage level of each module, and power to and from the HV battery.
The Battery-ECU checks the process of charging and charging the HV battery and the required cooling. The Battery-ECU communicates continuously with the HV-ECU. The Battery-ECU sends charging / discharge signals to the HV-ECU. The HV-ECU keeps the charging state at the desired level by calculating the load and discharge amp and, if necessary, adjusting the hybrid drive status. The HV-ECU control is configured to keep the charging level of the HV battery as much as possible between 40% and 80% to ensure a long battery life. If the battery pack temperature becomes too high, loading / unloading is limited or interrupted and an alarm is generated.



Our Hybrid Repair Shop

Hybrid repair




At Prius repair shop we specialize in Hybrid repair Such as Toyota Hybrid Lexus Hybrid Repair , Honda Hybrid Repair specially Toyota Prius since 2001, we have invested in EV tool and computerized equipment for Toyota Prius  Hybrid repair and hybrid vehicle service and repair. Toyota has almost entirely designed the hybrid drive of the new Prius third generation engine and Prius transmission. the ride of Toyota Prius becomes more powerful. the part shown here is the electrical part of the hybrid drive. the left one is configuration of the second-generation of Toyota Prius. and the right is belong to second generation of Toyota Prius. as you can see The AC synchronous electric motor/generator and modified configuration of Prius transmission.

Prius Engine repair






Toyota promises that the Prius offers the same comfort and very smooth rides, in the city drive Toyota Prius surpasses that promise thank to the perfectly silent electric motor. But on the highway, the Prius offers great comfort, the car glides like a true limousine on the highway. The new EGR system allows for the recovery of heat from the exhaust gas stream. this allows for a shorter pre-heating time of cooling system of the internal combustion engine, so it has been previously heated up. therefore, the engine may stop earlier. in additional, there is faster heat available for heating the interior. the EGR system. increases the efficiency of the overall hybrid drive relative to the drive in Prius 2





The new power control unit inverter/converter is more compact design and direct cooling of the IGBT power transistors. the converter increase the voltage of 201.6 volts DC to 650 volts and a second DC/DC converter. increase the voltage of 201.6 volts DC to   650 volts DC and a second DC/DC converter converts the 201.6 volts into 12 volts serving charging the 12-volts auxiliary battery.

Rebuild prius Hybrid battery




at Toyota Prius repair shop we rebuild your existing Prius battery pack, the new battery pack of the Prius 3 consist of 28 module of 6 cells of 1.2 volts. each module provides a voltage of 9.6 volts. the total connected load of the battery pack is 201.6 volts. the total maximum peak power of the new battery pack is 27kw (36hp)How you can damage hybrid battery pack of gen 3 Toyota Prius.Damage to the hybrid battery pack can be caused by too long to continue driving in EV mode. in a normal situation, the computer will turn off The EV mode when the charge level of hybrid battery becomes too low. the battery pack should adequately protected by existing  security measures in the logic according to Toyota against deep discharge. in some cases it appears that the security is not enough.sometimes there will merely and the driver can override this to continue driving the electric motor. for more information for hybrid battery please contact us 

Prius Auxiliary battery

if the charge level of the auxiliary battery is too low, eg by self-discharge, the Prius 12v battery will be discharge in a month, a battery should never be fully discharge. 11.5 volts is a safe limit, stronger discharge leads to defects at 10.7 volts. the battery is clinically dead. the problem with lead acid batteries applies to all cars and of course not only Prius.

Problem Arise when a low charge level of the Prius Auxiliary battery getting lower

-The Prius fob does not open only the diver side

-all the electrical system are dead. the Prius is not starting

-the auxiliary battery is not accessible, because the rear door is not open

-the Prius is not going to move because parking brake is on

the Prius can be jump by using the jump start terminal and a second battery, the terminal is located under the hood in the box on the right side.

for learn more  information regarding Toyota Technology click here, for more information regarding your vehicle Hybrid repair please Contact Us

Toyota Lexus Hybrid Vehicle Service & repair
User Rating
5 based on 24 votes
Service Type
Toyota Lexus Hybrid Vehicle Service & repair
Provider Name
Toyota Prius Repair Shop,
23221 Peralta driv B ,Laguna Hills ,CA -92653,
Telephone No.9499160769
Orange County, LA, San Diego
At Prius repair shop we specialize in repairing Hybrid vehicle Such as Toyota Hybrid Lexus Hybrid, Honda Hybrid specially Toyota Prius since 2001, we have invested in EV tool and computerized equipment for Toyota Prius repair and hybrid car service and repair.

google reviews

Dark Wizard Pluto
07:28 28 Aug 19
Great service. Great warranty. Ken stands by his work!
Jason Rose
21:12 02 Aug 19
Ken is the man. Fair prices and great work. I would return and recommend to my family/friends.
stewart winkler
17:13 30 Jul 19
Ken really went above and beyond for me when we had issues with our car. I highly recommend him!
Ana Banana
22:29 26 Jul 19
I can't say enough good things about this shop. The owner knows Priuses (or Prii?) like the back of his hand, and he went out of his way to help me out. You will not be disappointed!read more
Damon Weaver
08:19 21 Jul 19
I appreciated that Ken took the time to not only answer my questions about the repair but he thoroughly explained ways to prevent unnecessary wear on the parts in the future.read more
Carol Reynolds
14:39 07 Apr 19
After years of expensive and unsatisfactory dealership service, my husband and I found Ken online and are happy we did. He's extremely knowledgeable, fair and honest - rare in the business. Thank you Ken for five-star service.read more
jim clarke
17:12 24 Mar 19
Ken is is honest, fair, & knows more about Prius’s than anybody I know. Has serviced my prius’s for years & did a recent rebuild on one that made it drive like new again!read more
Julie Duck
06:06 22 Feb 19