CN215897330U - Battery overdischarge low-voltage protection device and battery management control system - Google Patents
Battery overdischarge low-voltage protection device and battery management control system Download PDFInfo
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- CN215897330U CN215897330U CN202121736512.6U CN202121736512U CN215897330U CN 215897330 U CN215897330 U CN 215897330U CN 202121736512 U CN202121736512 U CN 202121736512U CN 215897330 U CN215897330 U CN 215897330U
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Abstract
The utility model discloses a battery overdischarge low-voltage protection device and a battery management control system, wherein the protection device comprises a high-voltage detection module, a low-voltage control module, a connecting switch and a switch actuator; the high-voltage detection module is used for detecting the maximum discharge voltage of the battery in real time; the connecting switch is arranged on a power supply path between the battery and the control terminal; the switch actuator is connected with the connecting switch; the low-voltage control module is electrically connected with the switch actuator and is used for controlling the action of the switch actuator; through the protection device, when the battery is in an over-discharge state, a power supply path between the battery and the control terminal can be automatically disconnected, so that the battery is in a completely no-load state, the over-discharge of the battery is effectively protected, and the power supply burden of the battery cannot be brought; in addition, the user can freely adjust the level of the threshold voltage according to the specification and the model of the current battery, so that the aim of freely adjusting the critical working point of the battery according to the actual application scene is fulfilled, and the use is convenient.
Description
Technical Field
The utility model relates to the technical field of over-discharge protection of batteries, in particular to a battery over-discharge low-voltage protection device and a battery management control system.
Background
At present, UPS power and lithium battery power backup system can be used in fields such as base station, computer lab, light storage, data center, and when the commercial power is normal, the UPS power supplies the load with the commercial power steady voltage after use, and UPS this moment is exactly an alternating current formula electric current stabiliser, and it still charges to built-in lithium battery simultaneously. For high-efficient and safe use lithium cell, present lithium cell is equipped with Battery Management System (BMS) still generally, when commercial power outage or UPS were dropped, BMS supplied power to the load through DC/DC module, if commercial power or UPS power were dropped and do not recover for a long time, the UPS power can not in time charge or mend the electricity to the lithium cell, because BMS's consumption, the voltage of lithium cell lasts and reduces, when lithium cell voltage reduced to a certain extent, BMS can only break off high-voltage loop (also be the power supply loop between lithium cell and the load) usually, but can not effectively cut off BMS low pressure power supply loop (also be the power supply loop between lithium cell and the BMS), thereby lead to the lithium cell excessive discharge loss, this can cause permanent damage to electric core. To this, also there is the scheme of cutting off the low pressure route between lithium cell and the BMS when battery voltage is too low in the existing market, this type of scheme is mostly realized only through the relay, but electromagnetic relay consumes energy itself, this can further aggravate the power supply burden of battery, most importantly, control the circular telegram between disconnection battery and the BMS through electromagnetic relay, can not rationally control the threshold output voltage of battery according to actual need, to the battery of different specifications and model, need just can through accurate debugging, it is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solve the above problems and to provide a battery over-discharge low voltage protection device and a battery management control system, which can disconnect a power connection path between a battery and a control terminal according to a current state of the battery to effectively prevent the battery from being over-discharged, and can freely adjust a critical operating point of the battery according to an actual application scenario.
In order to achieve the above object, the present invention discloses a battery overdischarge low voltage protection device for controlling a connection state between a battery and a control terminal, the protection device comprising a high voltage detection module, a low voltage control module, a connection switch and a switch actuator;
the high-voltage detection module is used for detecting the maximum discharge voltage of the battery in real time;
the connection switch is arranged on a power supply path between the battery and the control terminal;
the switch actuator is connected with the connecting switch and is used for opening or closing the connecting switch;
the low-voltage control module is electrically connected with the switch actuator and used for providing a low-voltage power supply for the switch actuator according to the detection result of the high-voltage detection module and a preset threshold voltage so as to control the action of the switch actuator.
Preferably, the low-voltage control module further comprises a maintenance switch, and the low-voltage control module is electrically connected with the switch actuator through the maintenance switch.
Preferably, the output end of the low-voltage control module is further electrically connected with an indicator, and the indicator is used for indicating the output state of the low-voltage control module.
Preferably, the indicator comprises a light emitting diode.
Preferably, the connection switch is an air switch, and the switch actuator is a release.
The utility model also discloses a battery management control system, which comprises a battery, a control terminal and the battery over-discharge low-voltage protection device, wherein the battery is electrically connected with the control terminal through a DC/DC module, the high-voltage detection module and the low-voltage control module are arranged in the control terminal, and the connecting switch is arranged in a power supply path between the DC/DC module and the control terminal.
Compared with the prior art, when a control terminal (such as a BMS) adopts the battery overdischarge low-voltage protection device disclosed by the utility model to perform overdischarge protection on a battery, if the maximum discharge voltage of the current battery is detected to be lower than a preset threshold voltage, a low-voltage power supply is provided for a switch actuator through a low-voltage control module, so that the switch actuator acts, a connecting switch is further opened, a power supply path between the battery and the control terminal is disconnected, the battery is in a completely unloaded state, the battery overdischarge is effectively protected, and furthermore, an execution device (the connecting switch and the switch actuator) performing overdischarge protection is a passive device, does not consume electric energy in a non-acting device and does not bring power supply burden to the battery; in addition, the low-voltage control module can control the connection switch to act according to the preset threshold voltage, so that a user can freely adjust the level of the threshold voltage according to the specification and the model of the current battery, the aim of freely adjusting the critical working point of the battery according to the actual application scene is fulfilled, the use is convenient, and the battery is effectively protected.
Drawings
Fig. 1 is a schematic circuit connection diagram of a battery management control system according to an embodiment of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, the present embodiment discloses a battery management control system, which includes a battery 1, a control terminal 2 and a battery over-discharge low-voltage protection device, wherein the battery 1 is electrically connected to the control terminal 2 through a DC/DC module 10. The protection device comprises a high-voltage detection module 20, a low-voltage control module 21, a connection switch J1 and a switch actuator M1. The high voltage detection module 20 is used to detect the maximum discharge voltage of the battery 1 in real time. The connection switch J1 is provided in the power supply path between the battery 1 and the control terminal 2, that is, between the DC/DC module 10 and the control terminal 2. The switch actuator M1 is connected to the connection switch J1 for opening or closing the connection switch J1. The low voltage control module 21 is electrically connected to the switch actuator M1, and is configured to provide a low voltage power supply to the switch actuator M1 according to the detection result of the high voltage detection module 20 and a preset threshold voltage, so as to control the operation of the switch actuator M1. In this embodiment, the high voltage detection module 20 and the low voltage control module 21 are disposed in the control terminal 2, and it is not necessary to design a separate component outside the control terminal 2. It should be noted that the specific circuit structures of the high voltage detection module 20 and the low voltage control module 21 are common technical knowledge in the art, and are not described herein again.
The working principle and the action process of the battery overdischarge low-voltage protection device are as follows:
the control terminal 2 detects the maximum discharge voltage of the battery 1 in real time through the high voltage detection module 20, that is, detects whether the current battery 1 is at a critical operating point, and when the maximum discharge voltage of the battery 1 is lower than a preset threshold, the low voltage control module 21 provides a low voltage power supply to the switch actuator M1, so that the switch actuator M1 acts to open the connection switch J1, and further, the power supply path between the DC/DC module 10 and the control terminal 2 is disconnected. Therefore, with the above-mentioned overdischarge low-voltage protection device for the battery 1, when the battery 1 is at the critical operating point, the control terminal 2 can automatically disconnect the power supply path from the battery 1, so that the battery 1 is completely in the no-load state, thereby preventing the battery 1 from being damaged due to overdischarge. Specifically, the preset threshold value of the maximum discharge voltage of the battery 1 is adjusted in real time through the control terminal 2, so that the critical working point of the battery 1 is adjusted according to the model and specification of the battery, the use is convenient, and differential protection can be achieved according to different batteries 1.
Further, when the charging power supply (such as UPS power supply) of the battery 1 is recovered, in order to charge the battery 1 to recover the connection state with the control terminal 2, the protection device in this embodiment further includes a maintenance switch J2, and the low voltage control module 21 is electrically connected to the switch actuator M1 through the maintenance switch J2. During normal operation, the maintenance switch J2 is normally closed to communicate the power path between the low voltage control module 21 and the switch actuator M1. When the battery 1 needs to be charged and the battery 1 management control system needs to be maintained, the maintenance switch J2 is first opened to disconnect the power supply path between the low-voltage control module 21 and the connection switch J1, and at the same time, the connection switch J1 is operated to make the connection switch J1 in a closed state, so as to restore the power supply path between the DC/DC module 10 and the control terminal 2, the high-voltage detection module 20 in the control terminal 2 continuously detects whether the maximum discharge voltage of the battery 1 is higher than a preset threshold value during charging, if so, the maintenance switch J2 is closed, the connection path between the low-voltage control module 21 and the switch actuator M1 is connected, and at this time, because whether the maximum discharge voltage of the battery 1 is higher than the preset threshold value, the output of the low-voltage control module 21 is zero, the switch actuator M1 does not act, so that the connection switch J1 is kept in a closed state.
Specifically, the connection switch J1 and the maintenance switch J2 in the above embodiments are both air switches, and the switch actuator M1 is a trip.
In addition, in order to detect the current state of the battery 1, an indicator L1 is electrically connected to the output end of the low voltage control module 21, and the indicator L1 is used for indicating the output state of the low voltage control module 21. Preferably, the indicator L1 is a light emitting diode. When the battery 1 is in a critical working point and enters a protection state, the low-voltage control module 21 has voltage power supply output so as to light the light-emitting diode, and when the battery 1 is in a normal state, the output of the low-voltage control module 21 is zero so as to make the light-emitting diode in an off state, so that the current state of the battery 1 can be judged by observing the state of the light-emitting diode.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (6)
1. A battery overdischarge low-voltage protection device is used for controlling the connection state between a battery and a control terminal and is characterized by comprising a high-voltage detection module, a low-voltage control module, a connection switch and a switch actuator;
the high-voltage detection module is used for detecting the maximum discharge voltage of the battery in real time;
the connection switch is arranged on a power supply path between the battery and the control terminal;
the switch actuator is connected with the connecting switch and is used for opening or closing the connecting switch;
the low-voltage control module is electrically connected with the switch actuator and used for providing a low-voltage power supply for the switch actuator according to the detection result of the high-voltage detection module and a preset threshold voltage so as to control the action of the switch actuator.
2. A battery overdischarge low voltage protection device as claimed in claim 1, further comprising a maintenance switch, wherein said low voltage control module is electrically connected to said switch actuator through said maintenance switch.
3. A battery overdischarge low voltage protection device as claimed in claim 2, wherein an indicator is electrically connected to the output of the low voltage control module for indicating the output status of the low voltage control module.
4. A battery over-discharge low voltage protection device as claimed in claim 3, wherein said indicator comprises a light emitting diode.
5. A battery overdischarge low voltage protection device according to claim 1, wherein said connection switch is an air switch and said switch actuator is a release.
6. A battery management control system comprising a battery, a control terminal and a battery over-discharge low-voltage protection device as claimed in any one of claims 1 to 5, wherein the battery is electrically connected to the control terminal through a DC/DC module, the high-voltage detection module and the low-voltage control module are disposed in the control terminal, and the connection switch is disposed in a power path between the DC/DC module and the control terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121736512.6U CN215897330U (en) | 2021-07-28 | 2021-07-28 | Battery overdischarge low-voltage protection device and battery management control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121736512.6U CN215897330U (en) | 2021-07-28 | 2021-07-28 | Battery overdischarge low-voltage protection device and battery management control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215897330U true CN215897330U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121736512.6U Active CN215897330U (en) | 2021-07-28 | 2021-07-28 | Battery overdischarge low-voltage protection device and battery management control system |
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| CN (1) | CN215897330U (en) |
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2021
- 2021-07-28 CN CN202121736512.6U patent/CN215897330U/en active Active
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