CN203871876U - Charging and discharging protection structure of battery management system - Google Patents
Charging and discharging protection structure of battery management system Download PDFInfo
- Publication number
- CN203871876U CN203871876U CN201420048401.XU CN201420048401U CN203871876U CN 203871876 U CN203871876 U CN 203871876U CN 201420048401 U CN201420048401 U CN 201420048401U CN 203871876 U CN203871876 U CN 203871876U
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- Prior art keywords
- management system
- battery management
- protection structure
- charging electrode
- battery
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- 238000007599 discharging Methods 0.000 title abstract 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000003116 impacting effect Effects 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a charging and discharging protection structure of a battery management system. The output end of the battery management system comprises a positive charging electrode and a negative charging electrode that are used for connecting a load. The protection structure is characterized in that the two ends of the positive charging electrode and the negative charging electrode are in reverse parallel connection with a diode, so as to form a reverse current loop. The protection structure can effectively prevent discharging of a large current from impacting an MOS tube, and overcome the defects that the high overpressure resistant power MOS tube is large in follow current temperature rise and high in cost.
Description
Technical field
The utility model 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.Yet, safe and reliable use battery, just need to battery, monitor 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, a plurality of resistance and a plurality of 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, yet this has but improved the cost of battery management system greatly.
Utility model content
For the defect existing in above-mentioned prior art, the purpose of this utility model 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 utility model solves the technical scheme that its technical problem adopts:
A kind of charge/discharge protection structure of battery management system; the output of described battery management system comprises for connecting positive and negative two charging electrodes of 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 beneficial effects of the utility model are: adopt the utility model 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, high in cost of production shortcoming but also overcome.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
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 utility model 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 make trickle change and adjustment by reading after this programme, 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 for connecting positive and negative two charging electrodes of 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 |
|---|---|---|---|
| CN201420048401.XU CN203871876U (en) | 2014-01-26 | 2014-01-26 | Charging and discharging protection structure of battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420048401.XU CN203871876U (en) | 2014-01-26 | 2014-01-26 | Charging and discharging protection structure of battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203871876U true CN203871876U (en) | 2014-10-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420048401.XU Expired - Lifetime CN203871876U (en) | 2014-01-26 | 2014-01-26 | Charging and discharging protection structure of battery management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203871876U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855766A (en) * | 2014-01-26 | 2014-06-11 | 江苏博强新能源科技有限公司 | Charging and discharging protecting structure of battery management system |
| CN104577995A (en) * | 2015-01-27 | 2015-04-29 | 安泰立 | Lithium battery protection circuit device with fly-wheel circuit |
-
2014
- 2014-01-26 CN CN201420048401.XU patent/CN203871876U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855766A (en) * | 2014-01-26 | 2014-06-11 | 江苏博强新能源科技有限公司 | Charging and discharging protecting structure of battery management system |
| CN104577995A (en) * | 2015-01-27 | 2015-04-29 | 安泰立 | Lithium battery protection circuit device with fly-wheel circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Suzhou City, Jiangsu province 215625 Zhangjiagang City Jin Fengzhen Jiangsu Yangtze River International Metallurgical Industrial Park (Yu Bridge Village 25) Jiangsu Bo new energy Polytron Technologies Inc Patentee after: JIANGSU BOQIANG NEW ENERGY TECHNOLOGY CO.,LTD. Address before: Suzhou City, Jiangsu province 215625 Zhangjiagang City Jin Fengzhen Jiangsu Yangtze River International Metallurgical Industrial Park (Yu Bridge Village 25) Jiangsu Richpower Amperex Technology Limited Patentee before: JIANGSU RICHPOWER NEW ENERGY CO.,LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141008 |
|
| CX01 | Expiry of patent term |