Nickel-metal hydride battery pack charging device

A technology for charging devices and nickel-metal hydride batteries, applied in battery circuit devices, circuit devices, energy-saving charging equipment, etc., can solve the problems of charging circuit current instability, large heat generation, low charging efficiency, etc., to improve charging efficiency , Stabilize charging current and reduce heat generation

Inactive Publication Date: 2013-09-04
ROSENBERGER (SHANGHAI) TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most current charging circuits that use constant current charging have relatively large currents. As the voltage of the Ni-MH battery keeps changing, the difference between the output voltage of the charging circuit and the voltage of the Ni-MH battery is also changing, causing the current in the charging circuit to be unstable. , resulting in a large overall heat generation of the nickel-metal hydride battery pack charging device, and at the same time making the charging efficiency of the system lower

Method used

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  • Nickel-metal hydride battery pack charging device
  • Nickel-metal hydride battery pack charging device
  • Nickel-metal hydride battery pack charging device

Examples

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Embodiment 1

[0054] This embodiment provides a charging device for a nickel-metal hydride battery pack, such as figure 1 As shown, it is a schematic diagram of a circuit structure of the device, which mainly includes a constant current adjustment module 10 , a DC power supply 30 and a nickel-metal hydride battery 40 .

[0055] The constant current adjustment module 10 includes a switching power supply controller 101 , a rectification unit 102 , a detection resistor 103 and a differential amplification unit 104 .

[0056] The DC power supply 30 is sequentially connected to the Ni-MH battery 40 through the switching power supply controller 101 , the rectifying unit 102 and the detection resistor 103 , and provides charging current for the Ni-MH battery 40 .

[0057] Both ends of the detection resistor 103 are respectively connected to two input ends of the differential amplifier unit 104 . The output terminal of the differential amplifier unit 104 is connected to the switching power supply ...

Embodiment 2

[0071] In the actual application environment, when the Ni-MH battery is charged when the charging current is less than a certain value, the Ni-MH battery may not have a voltage drop phenomenon in the state of charge saturation, so the charging saturation is performed only based on whether the battery voltage has dropped. Misjudgment may occur in judgment, and this embodiment provides a charging device for a nickel-metal hydride battery pack that can solve the above defects.

[0072] Such as image 3 As shown, the saturation judging module 20 of the Ni-MH battery pack charging device may further include a feedback comparison unit 209 for judging whether the battery voltage is within a safe charging range. The feedback comparison unit includes a third voltage comparator 2091 and a charging switch 2092, the charging switch 2092 is connected between the detection resistor 103 and the Ni-MH battery 40, and an input terminal of the third voltage comparator 2091 is connected between ...

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Abstract

The embodiment of the invention discloses a nickel-metal hydride battery pack charging device, which comprises a constant current regulation module, wherein the constant current regulation module comprises a switching power controller, a rectification unit, a detection resistor and a differential amplification unit; a power supply is connected with nickel-metal hydride batteries sequentially by the switching power controller, the rectification unit and the detection resistor; the two ends of the detection resistor are connected to the two input ends of the differential amplification unit respectively; the output end of the differential amplification unit is connected to the switching power controller, and outputs a feedback signal to the switching power controller; and the switching powercontroller controls own operating condition according to the received feedback signal to further regulate the duty cycle of switching in the rectification unit. The device can automatically regulate the output voltage of a charging circuit and stabilize a difference between the output voltage of the charging circuit and the voltage of the nickel-metal hydride battery, thereby stabilizing a charging current. Therefore, the scheme can effectively improve the charging efficiency and reduce overall calorific value.

Description

Technical field: [0001] The invention relates to the technical field of nickel-metal hydride batteries, in particular to a charging device for a nickel-hydrogen battery pack. Background technique: [0002] Ni-MH battery is a new type of green battery developed in the 1990s. It has the characteristics of high energy, long life, and no pollution. Therefore, it has become one of the high-tech products that countries around the world are competing to develop. With the continuous development and improvement of nickel metal hydride battery technology, various performance indicators of nickel metal hydride batteries have also been greatly improved, making them widely used in mobile communications, portable digital devices, power tools and electric vehicles. [0003] When the electric quantity stored in the Ni-MH battery is lower than a certain level, it needs to be charged before it can continue to be used. At present, the industry usually uses a constant current charging circuit ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
CPCY02B40/90Y02E70/40Y02E60/10
Inventor 王伟臣邢连锋石昕
Owner ROSENBERGER (SHANGHAI) TECH CO LTD
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