CN110429697A - Under-voltage protecting circuit and guard method - Google Patents
Under-voltage protecting circuit and guard method Download PDFInfo
- Publication number
- CN110429697A CN110429697A CN201910856080.3A CN201910856080A CN110429697A CN 110429697 A CN110429697 A CN 110429697A CN 201910856080 A CN201910856080 A CN 201910856080A CN 110429697 A CN110429697 A CN 110429697A
- Authority
- CN
- China
- Prior art keywords
- relay
- battery
- management system
- power supply
- battery management
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
Abstract
The present invention proposes a kind of under-voltage protecting circuit and guard method, and battery pack gives battery management system charging by Switching Power Supply；When battery voltage is less than first threshold, battery management system and Switching Power Supply power-off.The present invention can cut off all power consumption circuits when battery has power shortage risk in time, protect battery.
Description
Technical field
The present invention relates to battery management system field, in particular to a kind of under-voltage protecting circuit and guard method.
Background technique
Battery management system BMS power supply needs to obtain from battery, when battery management system BMS stand for a long time it is uncharged
When, it will lead to the even irrecoverability damage of battery power shortage.If being powered using manual switch control battery management system BMS,
It can not achieve the discretionary protection function of battery management system BMS, if human factor is forgotten to close manual switch, also result in electricity
The damage of pond power shortage.
Summary of the invention
The object of the present invention is to provide a kind of under-voltage protecting circuit and guard methods, for solving electricity of the existing technology
The problem of pond power shortage damages.
To achieve the above object, the present invention proposes a kind of under-voltage protecting circuit, and battery pack is by Switching Power Supply to cell tube
The charging of reason system；When battery voltage is less than first threshold, battery management system and Switching Power Supply power-off.
Optionally, the under-voltage protecting circuit includes the first relay and the second relay, and battery pack passes through described first
Relay is connected with Switching Power Supply, and Switching Power Supply is connected by the second relay with battery management system, first relay
It is connected with second relay；
When battery management system needs to charge, first relay and second relay conducting；Work as battery pack
When voltage is less than first threshold, the second relay shutdown, battery management system and Switching Power Supply power-off are controlled.
Optionally, the first relay first end connects battery anode, and the first relay second end connection is opened
Powered-down source high potential input terminal, the Switching Power Supply low potential input terminal connect battery electrode；Second relay first
Connection switch power supply high-potential output end is held, the second relay second end connects the first relay third end, described
The 4th end connection switch power supply negative potential output end of first relay, the second relay third end and second relay
4th end connects battery management system.
Optionally, the under-voltage protecting circuit further includes first switch, the first end and second end point of the first switch
Not connected with the first end and second end of first relay；
When battery management system needs to charge, the first switch conducting, subsequent second relay and institute are controlled
It states the first relay to sequentially turn on, after first relay conducting, controls the first switch shutdown.
Optionally, the battery management system sampling battery group voltage, controls the first switch, the first relay and institute
State the on-off of the second relay.
The present invention also proposes a kind of low-voltage protection method, and battery pack is charged by Switching Power Supply to battery management system；When
When battery voltage is less than first threshold, battery management system and Switching Power Supply power-off.
Optionally, battery pack is connected by first relay with Switching Power Supply, and Switching Power Supply passes through the second relay
It is connected with battery management system, first relay is connected with second relay；
When battery management system needs to charge, first relay and second relay conducting；Work as battery pack
When voltage is less than first threshold, the second relay shutdown, battery management system and Switching Power Supply power-off are controlled.
Compared with prior art, the invention has the following advantages that battery pack is filled by Switching Power Supply to battery management system
Electricity；When battery voltage is less than first threshold, battery management system and Switching Power Supply power-off.The present invention has power shortage wind in battery
When dangerous, all power consumption circuits can be cut off in time, protect battery；And control loop of the present invention is simple, it is low in cost.
Detailed description of the invention
Fig. 1 is the control principle drawing of battery management system under-voltage protecting circuit of the present invention；
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, to convenient, the lucidly aid illustration embodiment of the present invention the mesh
's.
As shown in Figure 1, illustrating the control principle drawing of battery management system under-voltage protecting circuit of the present invention, battery pack passes through
Switching Power Supply charges to battery management system BMS, and battery management system BMS controls the charge and discharge of battery pack.The under-voltage protection
Circuit includes the first relay PLY1, the second relay PLY2 and first switch K1, and the first relay PLY1 first end connects
Connect battery anode, the first relay PLY1 second end connection switch power supply high potential input terminal, the Switching Power Supply is low
Current potential input terminal connects battery electrode；The second relay PLY2 first end connection switch power supply high-potential output end, institute
It states the second relay PLY2 second end and connects the first relay third end, the 4th end the first relay PLY1 connection is opened
Powered-down source negative potential output end, the second relay PLY2 third end connect battery with the 4th end the second relay PLY2
Management system.The first end and second end of the first switch K1 first end and second with the first relay PLY1 respectively
End connection.When battery management system needs to charge, the first switch K1 conducting is controlled, battery pack is powered to Switching Power Supply,
Switching Power Supply assumes output 24V direct current, there is electric current in the coil of the second relay PLY2, and the second relay PLY2 is connected, with
There is electric current in the coil of the first relay afterwards, the first relay PLY1 conducting controls described the after the first relay PLY1 conducting
One switch K1 shutdown.When battery charges for a long time, since battery management system BMS is constantly in power consumption state, battery can be located
In power shortage state, when battery voltage is less than first threshold, battery management system BMS and Switching Power Supply need to power off, that is, control
Make the second relay PLY disconnection.The batteries management system BMS sampling battery group voltage, electric current, control first switch K1,
The on-off of first relay PLY1 and the second relay PLY2, while controlling battery pack and converter, and control converter and
The connection of battery management system.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
It can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (7)
1. a kind of under-voltage protecting circuit, it is characterised in that: battery pack is charged by Switching Power Supply to battery management system；Work as battery
When group voltage is less than first threshold, battery management system and Switching Power Supply power-off.
2. under-voltage protecting circuit according to claim 1, it is characterised in that: the under-voltage protecting circuit includes the first relay
Device and the second relay, battery pack are connected by first relay with Switching Power Supply, and Switching Power Supply passes through the second relay
It is connected with battery management system, first relay is connected with second relay；
When battery management system needs to charge, first relay and second relay conducting；Work as battery voltage
When less than first threshold, the second relay shutdown, battery management system and Switching Power Supply power-off are controlled.
3. according to under-voltage protecting circuit according to claim 2, it is characterised in that: the first relay first end connection
Battery anode, the first relay second end connection switch power supply high potential input terminal, the Switching Power Supply low potential are defeated
Enter end connection battery electrode；The second relay first end connection switch power supply high-potential output end, second relay
Device second end connects the first relay third end, the 4th end connection switch power supply negative potential of the first relay output
End, the second relay third end connects battery management system with the 4th end of the second relay.
4. under-voltage protecting circuit according to claim 3, it is characterised in that: the under-voltage protecting circuit further includes first opening
It closes, the first end and second end of the first switch is connected with the first end and second end of first relay respectively；
When battery management system needs to charge, first switch conducting is controlled, subsequent second relay and described the
One relay sequentially turns on, and after first relay conducting, controls the first switch shutdown.
5. under-voltage protecting circuit according to claim 4, it is characterised in that: the battery management system sampling battery group electricity
Pressure, controls the on-off of the first switch, the first relay and second relay.
6. a kind of low-voltage protection method, it is characterised in that: battery pack is charged by Switching Power Supply to battery management system；Work as battery
When group voltage is less than first threshold, battery management system and Switching Power Supply power-off.
7. low-voltage protection method according to claim 6, it is characterised in that: battery pack is by first relay and opens
Powered-down source connection, Switching Power Supply are connected by the second relay with battery management system, first relay and described second
Relay connection；
When battery management system needs to charge, first relay and second relay conducting；Work as battery voltage
When less than first threshold, the second relay shutdown, battery management system and Switching Power Supply power-off are controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910856080.3A CN110429697A (en) | 2019-09-11 | 2019-09-11 | Under-voltage protecting circuit and guard method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910856080.3A CN110429697A (en) | 2019-09-11 | 2019-09-11 | Under-voltage protecting circuit and guard method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110429697A true CN110429697A (en) | 2019-11-08 |
Family
ID=68418953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910856080.3A Pending CN110429697A (en) | 2019-09-11 | 2019-09-11 | Under-voltage protecting circuit and guard method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110429697A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313374A (en) * | 2020-03-09 | 2020-06-19 | 深圳市麦澜创新科技有限公司 | Battery system under-voltage protection circuit and method applied to electric bicycle BMS |
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| CN103581938A (en) * | 2012-07-27 | 2014-02-12 | 艾默生网络能源有限公司 | Base station power management method, device and system and switching power supply |
| CN203967789U (en) * | 2014-06-19 | 2014-11-26 | 石家庄煤矿机械有限责任公司 | A kind of mining electric trackless rubber-wheeled vehicle power supply safety protective device |
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| CN109808547A (en) * | 2019-04-04 | 2019-05-28 | 安徽卓越电气有限公司 | A kind of low-power consumption power accumulator igniting electrifying control circuit and control method |
| CN109861382A (en) * | 2019-04-03 | 2019-06-07 | 广州宝狮新能源有限公司 | A kind of power-supply system of anti-surge voltage impact |
| CN109980609A (en) * | 2019-03-29 | 2019-07-05 | 江苏原容新能源科技有限公司 | Battery under-voltage protection method and system based on BMS |
| CN209329762U (en) * | 2019-02-27 | 2019-08-30 | 广州宝狮新能源有限公司 | A kind of and energy storage and uninterruptible power supply system |
| CN211239353U (en) * | 2019-09-11 | 2020-08-11 | 杭州协能科技股份有限公司 | Undervoltage protection circuit |
-
2019
- 2019-09-11 CN CN201910856080.3A patent/CN110429697A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103581938A (en) * | 2012-07-27 | 2014-02-12 | 艾默生网络能源有限公司 | Base station power management method, device and system and switching power supply |
| CN203967789U (en) * | 2014-06-19 | 2014-11-26 | 石家庄煤矿机械有限责任公司 | A kind of mining electric trackless rubber-wheeled vehicle power supply safety protective device |
| CN205002967U (en) * | 2015-07-06 | 2016-01-27 | 廊坊市汇聚电动汽车有限公司 | Pure electric vehicles power assembly test platform system |
| CN205292314U (en) * | 2015-11-18 | 2016-06-08 | 常州豪爵电动车有限公司 | Electric vehicle controller with electricity buret reason function |
| CN208585115U (en) * | 2018-06-26 | 2019-03-08 | 河南锂动电源有限公司 | A kind of lithium battery high voltage system being exclusively used in shield electric traction locomotive |
| CN209329762U (en) * | 2019-02-27 | 2019-08-30 | 广州宝狮新能源有限公司 | A kind of and energy storage and uninterruptible power supply system |
| CN109980609A (en) * | 2019-03-29 | 2019-07-05 | 江苏原容新能源科技有限公司 | Battery under-voltage protection method and system based on BMS |
| CN109861382A (en) * | 2019-04-03 | 2019-06-07 | 广州宝狮新能源有限公司 | A kind of power-supply system of anti-surge voltage impact |
| CN109808547A (en) * | 2019-04-04 | 2019-05-28 | 安徽卓越电气有限公司 | A kind of low-power consumption power accumulator igniting electrifying control circuit and control method |
| CN211239353U (en) * | 2019-09-11 | 2020-08-11 | 杭州协能科技股份有限公司 | Undervoltage protection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313374A (en) * | 2020-03-09 | 2020-06-19 | 深圳市麦澜创新科技有限公司 | Battery system under-voltage protection circuit and method applied to electric bicycle BMS |
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