CN103855766A - Charging and discharging protecting structure of battery management system - Google Patents
Charging and discharging protecting structure of battery management system Download PDFInfo
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- CN103855766A CN103855766A CN201410036190.2A CN201410036190A CN103855766A CN 103855766 A CN103855766 A CN 103855766A CN 201410036190 A CN201410036190 A CN 201410036190A CN 103855766 A CN103855766 A CN 103855766A
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- management system
- battery management
- charging
- protecting structure
- discharging
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging and discharging protecting structure of a battery management system. The output end of the battery management system comprises a positive charging electrode and a negative charging electrode which are connected with a load. The charging and discharging protecting structure is characterized in that the positive charging electrode and the negative charging electrode of the battery management system are reversely connected with a diode in parallel so as to form a reverse current path. By the adoption of the charging and discharging protecting structure, impact to an MOS transistor caused by high current discharging can be prevented effectively, and meanwhile the defects that by the adoption of the MOS transistor with high voltage resistance power, follow current temperature rise is high, and cost is high are overcome.
Description
Technical field
The present invention relates to battery management system technical field, particularly a kind of charge/discharge protection structure of battery management system.
Background technology
Along with the development of electronic industry, people are increasing to the demand of clean energy resource, and battery is as a kind of storage medium of the energy, has the features such as energy density is high, environmentally safe, and its range of application is more and more extensive.But, safe and reliable use battery, just need to monitor battery a kind of device, thereby prevent the situations such as battery overcharges, overdischarge, short circuit and the battery life that causes seriously shortens, even cause the generation of the situations such as security incident.This device is exactly battery management system.
At present, existing battery management system comprises battery detection device, multiple resistance and multiple metal-oxide-semiconductor, and battery detection device is for detection of each battery both end voltage, at cell voltage during higher than a certain threshold values, this battery and metal-oxide-semiconductor conducting in parallel, the battery being full of to other to fall electric voltage equalization.
The multi-factor structure of general high-power MOS tube shortens dramatically the channel length of each MOS element, and be the raceway groove parallel connection of all MOS elements, this certainly will make channel resistance significantly reduce, thereby makes under same rated junction temperature, and its on state current improves greatly.In addition, channel length shortens, and is that the transit time of charge carrier reduces.The parallel connection of raceway groove has allowed more charge carrier to spend more simultaneously, and shortened its switching time, although make like this MOS element can pass through larger electric current, MOS component pressure can reduce a lot.While being particularly applied in heavy-current discharge, because load may be perceptual, the moment of turn-offing MOS element can produce induced voltage, and punctures MOS element, causes battery management system unstable.
In order to overcome the problems referred to above, common way is the metal-oxide-semiconductor afterflow that adopts high Breakdown Voltage Power, but this has but improved the cost of battery management system greatly.
Summary of the invention
For the defect existing in above-mentioned prior art, the object of the invention is: propose a kind of charge/discharge protection structure of battery management system simple in structure, with low cost, to solve above-mentioned the deficiencies in the prior art.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of charge/discharge protection structure of battery management system; the output of described battery management system comprises positive and negative two charging electrodes for connecting load; it is characterized in that, at diode of the positive and negative charging electrode two ends of described battery management system reverse parallel connection, form a reverse current path.
The invention has the beneficial effects as follows: adopt the present invention not only can effectively prevent the impact of heavy-current discharge to metal-oxide-semiconductor, adopt the metal-oxide-semiconductor afterflow temperature rise of high Breakdown Voltage Power large but also overcome, high in cost of production shortcoming.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, in battery charging process, battery pack 01 is connected to battery management system 02, the output of battery management system is respectively equipped with positive and negative two electrode P+ and P-, innovation of the present invention is just, between two electrode P+ and P-reverse parallel connection a diode 03, thereby in discharge loop, form an afterflow path, enable to discharge the voltage at metal-oxide-semiconductor two ends, prevent that the metal-oxide-semiconductor in battery management system from being punctured by large electric current.
The above-described preferred embodiment of utilizing describes this programme in detail, and the scope of unrestricted this programme.Those skilled in the art can, by reading after this programme, make trickle change and adjustment, and the main idea place of this programme of will can yet be regarded as does not also depart from the spirit and scope of this programme.
Claims (1)
1. the charge/discharge protection structure of a battery management system; the output of described battery management system comprises positive and negative two charging electrodes for connecting load; it is characterized in that; at diode of the positive and negative charging electrode two ends of described battery management system reverse parallel connection, form a reverse current path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410036190.2A CN103855766A (en) | 2014-01-26 | 2014-01-26 | Charging and discharging protecting structure of battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410036190.2A CN103855766A (en) | 2014-01-26 | 2014-01-26 | Charging and discharging protecting structure of battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103855766A true CN103855766A (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410036190.2A Pending CN103855766A (en) | 2014-01-26 | 2014-01-26 | Charging and discharging protecting structure of battery management system |
Country Status (1)
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| CN (1) | CN103855766A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044902A (en) * | 2009-10-20 | 2011-05-04 | 徐辛 | Lithium-ion automobile starting storage battery with super capacitor function |
| CN102306943A (en) * | 2011-09-15 | 2012-01-04 | 河北工业大学 | Lithium ion battery management system |
| CN102655346A (en) * | 2012-04-25 | 2012-09-05 | 浙江大学 | Intelligent battery module and battery pack with automatic balance capability |
| CN103166290A (en) * | 2013-03-26 | 2013-06-19 | 欣旺达电子股份有限公司 | Control and protection circuit for single-lithium battery electric tool and detection and control method for control and protection circuit |
| CN203871876U (en) * | 2014-01-26 | 2014-10-08 | 江苏博强新能源科技有限公司 | Charging and discharging protection structure of battery management system |
-
2014
- 2014-01-26 CN CN201410036190.2A patent/CN103855766A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044902A (en) * | 2009-10-20 | 2011-05-04 | 徐辛 | Lithium-ion automobile starting storage battery with super capacitor function |
| CN102306943A (en) * | 2011-09-15 | 2012-01-04 | 河北工业大学 | Lithium ion battery management system |
| CN102655346A (en) * | 2012-04-25 | 2012-09-05 | 浙江大学 | Intelligent battery module and battery pack with automatic balance capability |
| CN103166290A (en) * | 2013-03-26 | 2013-06-19 | 欣旺达电子股份有限公司 | Control and protection circuit for single-lithium battery electric tool and detection and control method for control and protection circuit |
| CN203871876U (en) * | 2014-01-26 | 2014-10-08 | 江苏博强新能源科技有限公司 | Charging and discharging protection structure of battery management system |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140611 |