CN210273527U - Battery pack protection device - Google Patents
Battery pack protection device Download PDFInfo
- Publication number
- CN210273527U CN210273527U CN201921131486.7U CN201921131486U CN210273527U CN 210273527 U CN210273527 U CN 210273527U CN 201921131486 U CN201921131486 U CN 201921131486U CN 210273527 U CN210273527 U CN 210273527U
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- China
- Prior art keywords
- battery pack
- switch
- terminal
- voltage
- protection device
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- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a group battery protection device. A switch (2) and a current sensor (4) are connected in series between a bus terminal (1) and a battery pack terminal of a battery pack (5), a voltage sensor (8) is connected between a battery pack positive terminal (7) and a battery pack negative terminal (6) of the battery pack terminal in a crossing mode, the output ends of the current sensor (4) and the voltage sensor (8) are electrically connected with the input end of a monitor (3), the output end of the monitor (3) is electrically connected with the control end of the switch (2), and when the monitor (3) closes the switch (2), the switch (2) is turned off when the discharge current of the current sensor (4) is larger than the maximum working current value of normal operation of the battery pack (5) or the voltage of the voltage sensor (8) is smaller than the lowest voltage value of allowable operation of the battery pack (5). The battery pack protection device is simple in structure, high in protection efficiency and extremely easy to be widely applied to discharge protection of the battery pack (5) in a commercial mode.
Description
Technical Field
The utility model relates to a protection device, especially a group battery protection device.
Background
UPS, i.e., an uninterruptible power supply, is a device that connects a battery pack to a host and converts direct current power into commercial power through a module circuit such as a host inverter. The power supply is a necessary common power supply for a communication base station and a data machine room, and is also a standby power supply during power failure in accidents. The storage battery pack is an energy storage device of the UPS, and especially plays an extremely important role in guaranteeing the operation of a communication base station and a data machine room under the condition of accident power failure. In order to prolong the time of emergency power supply, the UPS usually uses one or more batteries in parallel. Because the storage battery is peripheral equipment of the UPS power supply, although the UPS is provided with a charging plate to carry out charging management on the storage battery, the UPS has a protective measure for discharging the storage battery, and the over-discharge of the storage battery is easily caused; in addition, if the UPS host machine is abnormal in the operation process, the large-current discharge of the storage battery pack can be caused.
The direct consequence of over-discharge or heavy-current discharge of the storage battery is that firstly, the temperature of the storage battery is very easy to rise due to heavy-current discharge, the internal structure of the storage battery is damaged due to overheating of the storage battery, and combustion or explosion can be caused under extreme conditions; secondly, the frequent or long-time heavy current discharge can also cause the irreversible reaction of chemical substances in the battery, cause the permanent loss of the battery capacity, generate gas to cause the battery to swell and the like; and thirdly, if the battery pack is over-discharged to a value below the end voltage value, the battery pole plate can be damaged, even the UPS charging panel can not start normal charging, and the whole battery pack is scrapped. These directly lead to operational interruptions of the communication base stations, data centers and thus to greater irreversible losses.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the weak point among the prior art, provide a can stop battery overdischarge or the discharged group battery protection device of heavy current.
For solving the technical problem of the utility model, the technical scheme who adopts does, and group battery protection device includes bus bar terminal and storage battery's group battery terminal, especially:
a switch and a current sensor are connected in series between the bus terminal and the battery pack terminal;
a voltage sensor is connected between the positive battery pack terminal and the negative battery pack terminal of the battery pack terminal in a crossing manner;
the output ends of the current sensor and the voltage sensor are electrically connected with the input end of the monitor, the output end of the monitor is electrically connected with the control end of the switch, and the switch is turned off when the monitor closes the switch and the discharge current of the current sensor is larger than the maximum working current value of the normal operation of the storage battery pack or the voltage of the voltage sensor is smaller than the lowest voltage value of the allowable operation of the storage battery pack.
As a further improvement of the battery pack protection device:
preferably, the switch is a normally open switch.
Preferably, the normally open switch is a mechanical contact normally open switch or an electronic contactless normally open switch.
Preferably, the current sensor is a shunt, or an electronic current transformer, or a fiber optic current sensor.
Preferably, the voltage sensor is an electromagnetic voltage transformer, or a resistive divider, or a capacitive voltage transformer, or a hall voltage sensor.
Preferably, the monitor is a comparator, or a single chip, or a digital signal processor.
Compared with the prior art, the beneficial effects are that:
after the structure is adopted, the switch and the current sensor are connected in series in the charge-discharge loop, the voltage sensor is connected between the positive terminal of the battery pack and the negative terminal of the battery pack in a crossing manner, the output ends of the current sensor and the voltage sensor are electrically connected with the input end of the monitor, the output end of the monitor is electrically connected with the control end of the switch, and the monitor is a comparator, a single chip or a digital signal processor, so that when the discharge current of the storage battery is greater than the maximum working current value of the normal operation of the storage battery, or the voltage of the storage battery is less than the lowest voltage value of the allowable operation of the storage battery, the monitor can timely disconnect the discharge of the storage battery, and the phenomenon of excessive discharge or heavy current discharge of. The battery pack protection device is simple in structure, high in protection efficiency and extremely easy to be widely applied to discharge protection of the battery pack in a commercial mode.
Drawings
Fig. 1 is a schematic diagram of a basic circuit principle of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the battery pack protection apparatus is constructed as follows:
a switch 2 and a current sensor 4 are connected in series between a bus terminal 1 and a battery pack terminal of a battery pack 5, a voltage sensor 8 is connected between a battery pack positive terminal 7 and a battery pack negative terminal 6 of the battery pack terminal in a bridging manner, the output ends of the current sensor 4 and the voltage sensor 8 are electrically connected with the input end of a monitor 3, and the output end of the monitor 3 is electrically connected with the control end of the switch 2; the switch 2 is a normally open switch, the normally open switch is a mechanical contact normally open switch (or an electronic contactless normally open switch), the current sensor 4 is a shunt (or an electronic current transformer or an optical fiber current sensor), the voltage sensor 8 is an electromagnetic voltage transformer (or a resistance voltage divider or a capacitance voltage transformer or a hall voltage sensor), and the monitor 3 is a comparator (or a single chip microcomputer or a digital signal processor).
During the use, only need earlier according to the utility model discloses be applied to the electric parameter that each components and parts were selected to the voltage class among the electric power system, will again the utility model discloses a bus-bar terminal 1 and group battery positive terminal 7 and group battery negative terminal 6 insert respectively between UPS electrical power generating system's host computer cabinet and storage battery 5 can.
When the UPS is put into operation, the monitor 3 firstly closes the switch 2, and then turns off the switch 2 according to the condition that the discharge current of the current sensor 4 is larger than the maximum working current value of the normal operation of the storage battery pack 5 or the condition that the voltage of the voltage sensor 8 is smaller than the lowest voltage value of the allowable operation of the storage battery pack 5; otherwise, the switch 2 is kept closed.
It is apparent that those skilled in the art can make various changes and modifications to the battery pack protection apparatus of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. A battery pack protection device comprising a bus bar terminal (1) and a battery pack terminal of a battery pack (5), characterized in that:
a switch (2) and a current sensor (4) are connected in series between the bus terminal (1) and the battery pack terminal;
a voltage sensor (8) is connected between a battery pack positive terminal (7) and a battery pack negative terminal (6) of the battery pack terminal in a bridging manner;
the output ends of the current sensor (4) and the voltage sensor (8) are electrically connected with the input end of the monitor (3), the output end of the monitor (3) is electrically connected with the control end of the switch (2), and the switch (2) is turned off when the monitor (3) closes the switch (2) and the discharge current of the current sensor (4) is larger than the maximum working current value of the normal operation of the storage battery (5) or the voltage of the voltage sensor (8) is smaller than the lowest voltage value of the allowable operation of the storage battery (5).
2. A battery pack protection device as claimed in claim 1, characterized in that the switch (2) is a normally open switch.
3. The battery pack protection device according to claim 2, wherein the normally open switch is a mechanical contact normally open switch or an electronic contactless normally open switch.
4. Battery pack protection device according to claim 1, characterized in that the current sensor (4) is a shunt, or an electronic current transformer, or a fiber optic current sensor.
5. Battery pack protection device according to claim 1, characterized in that the voltage sensor (8) is an electromagnetic voltage transformer, or a resistive voltage divider, or a capacitive voltage transformer, or a hall voltage sensor.
6. A battery pack protection device as claimed in claim 1, characterized in that the monitor (3) is a comparator, or a single-chip microcomputer, or a digital signal processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921131486.7U CN210273527U (en) | 2019-07-18 | 2019-07-18 | Battery pack protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921131486.7U CN210273527U (en) | 2019-07-18 | 2019-07-18 | Battery pack protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210273527U true CN210273527U (en) | 2020-04-07 |
Family
ID=70012122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921131486.7U Expired - Fee Related CN210273527U (en) | 2019-07-18 | 2019-07-18 | Battery pack protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210273527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024098245A1 (en) * | 2022-11-08 | 2024-05-16 | 北方工业大学 | Current measurement apparatus based on optical fiber ring current sensor |
-
2019
- 2019-07-18 CN CN201921131486.7U patent/CN210273527U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024098245A1 (en) * | 2022-11-08 | 2024-05-16 | 北方工业大学 | Current measurement apparatus based on optical fiber ring current sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200407 |