CN212909089U - Intelligent safety power supply - Google Patents
Intelligent safety power supply Download PDFInfo
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- CN212909089U CN212909089U CN202022063762.XU CN202022063762U CN212909089U CN 212909089 U CN212909089 U CN 212909089U CN 202022063762 U CN202022063762 U CN 202022063762U CN 212909089 U CN212909089 U CN 212909089U
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Abstract
The utility model discloses an intelligent safety power supply. The power supply comprises a main battery pack, a standby battery and a battery management system; the battery management system comprises a rectification circuit, a high-frequency switching power supply main circuit, a battery output and voltage current detection circuit, a standby battery switching circuit and a control circuit; the first end of the high-frequency switching power supply main circuit is connected with the rectifying circuit, the second end of the high-frequency switching power supply main circuit is connected with the first end of the control circuit, the third end of the high-frequency switching power supply main circuit is connected with the first end of the standby battery switching circuit, the second end of the standby battery switching circuit is connected with the second end of the control circuit, the third end of the standby battery switching circuit is connected with the first end of the battery output and voltage and current detection circuit, and the second end of the battery output and voltage and current detection circuit is connected with the third end of the control circuit. The utility model discloses a this kind of circuit structure can realize the dynamic adjustment charge mode, improves charge efficiency, prevents that the battery from overcharging, makes easy operation change.
Description
Technical Field
The utility model belongs to the technical field of the power, more specifically relates to an intelligent safety power.
Background
With the development of aerospace technology in China, the rail trolley is also widely applied to tests in the aspects of mobile communication, satellite communication and satellite-borne electronics, the rail trolley is generally driven by a battery, and the safety and the intellectualization of the battery have important significance for the tests.
At present, the battery generally adopts a conventional charger, and the charging time is long; no special battery output protection system exists in the use of the battery; and the battery adopts conventional charging, and the battery charges after discharging, and when the battery electric energy is exhausted in the use process, or the battery is overheated and fails to be used, if no standby battery exists, the test interruption can be caused, and the use continuity is influenced.
The small rail car can vibrate in the use process, and the vibration can cause structural and technological damage to the whole battery and control, such as fatigue, fracture, abrasion of battery polar plates and structural members, loosening and separation of connecting pieces and the like, and has great influence on the service life and the use of the battery.
SUMMERY OF THE UTILITY MODEL
At least one defect or improvement demand to prior art, the utility model provides an intelligent safety power supply can realize adopting the dynamic adjustment mode of charging, improves charge efficiency, prevents that the battery from overcharging, makes easy operation change.
In order to achieve the above object, the utility model provides an intelligent safety power supply, include: the system comprises a main battery pack, a standby battery and a battery management system; the battery management system comprises a rectification circuit, a high-frequency switching power supply main circuit, a battery output and voltage current detection circuit, a standby battery switching circuit and a control circuit;
the first end of the high-frequency switching power supply main circuit is connected with the rectifying circuit, the second end of the high-frequency switching power supply main circuit is connected with the first end of the control circuit, the third end of the high-frequency switching power supply main circuit is connected with the first end of the standby battery switching circuit, the second end of the standby battery switching circuit is connected with the second end of the control circuit, the third end of the standby battery switching circuit is connected with the first end of the battery output and voltage and current detection circuit, and the second end of the battery output and voltage and current detection circuit is connected with the third end of the control circuit;
the main battery pack is connected with the fourth end of the standby battery switching circuit, and the standby battery is connected with the fifth end of the standby battery switching circuit.
Preferably, the intelligent safety power supply further comprises a temperature detection module for collecting the temperature of the external battery, and the temperature detection module is connected with the control circuit.
Preferably, the intelligent safety power supply further comprises a state display module for displaying the state of the external battery, and the state display module is connected with the control circuit.
Preferably, the intelligent safety power supply further comprises a housing and a support, the main battery pack, the backup battery and the battery management system being fixed in the housing by the support.
Preferably, the intelligent safety power supply further comprises a fixing support and a fixing spring, one end of the fixing spring is in contact with the fixing support, and the other end of the fixing spring is in contact with the outer surface of the shell.
Generally, compared with the prior art, the utility model, beneficial effect has:
(1) the high-frequency switching power supply main circuit, the battery output and voltage and current detection circuit, the standby battery switching circuit and the control circuit are added into the battery management system, so that the charging mode can be dynamically adjusted, the charging efficiency can be improved, the battery is prevented from being overcharged, and the operation is simplified. The output voltage and current of the battery can be detected, and protection can be performed when reverse connection, overload and short circuit are generated.
(2) The intelligent safety power supply also comprises a temperature detection module which can detect the temperature state of the battery and realize overheat protection.
(3) The intelligent safety power supply also comprises a standby battery pack, when the main battery pack is in a state of being incapable of being used continuously, the standby battery pack is automatically switched to, and the current state is displayed to prompt maintenance.
(4) The main battery pack, the spare battery pack, the intelligent battery management system and the shell are assembled into a whole, and a support piece is used for increasing the connection rigidity. The shell is additionally provided with a spring to be fixed with the fixed support, and the influence of vibration on the whole power supply is reduced by the spring action.
Drawings
Fig. 1 is a schematic diagram of a battery management system according to an embodiment of the present invention;
fig. 2 and 3 are schematic diagrams of the safety power supply according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The utility model discloses battery management system of embodiment, as shown in fig. 1, include: the device comprises a rectification circuit, a high-frequency switching power supply main circuit, a battery output and voltage current detection circuit, a standby battery switching circuit and a control circuit. Preferably, the control circuit is a microcomputer intelligent control circuit.
The first end of the high-frequency switching power supply main circuit is connected with the rectifying circuit, the second end of the high-frequency switching power supply main circuit is connected with the first end of the control circuit, the third end of the high-frequency switching power supply main circuit is connected with the first end of the standby battery switching circuit, the second end of the standby battery switching circuit is connected with the second end of the control circuit, the third end of the standby battery switching circuit is connected with the first end of the battery output and voltage and current detection circuit, and the second end of the battery output and voltage and current detection circuit is connected with the third end of the control circuit.
The rectifying circuit is used for converting the external alternating current 220V into direct current and transmitting the direct current to the high-frequency switching power supply main circuit.
The high-frequency switching power supply main circuit is used for converting a direct-current power supply from the rectifying circuit into a power supply suitable for battery charging, and is controlled by the control circuit. The battery can be charged in a three-stage charging manner. The control circuit changes the output charging voltage of the high-frequency switching power supply main circuit through the output charging control signal, so that the charging mode is changed. The charging control signal can adopt the existing control mode, for example, when the charging control signal output by the control circuit is a PWM signal, the output charging voltage of the high-frequency switching power supply main circuit is changed by changing the pulse width of the PWM signal.
The standby battery switching circuit is used for realizing the functions of charging the main battery pack or the standby battery according to the signal transmitted by the control circuit, and adopting the main battery pack or the standby battery as the power supply of the electrical equipment. For example, the control circuit judges the state of the main battery, and when the main battery pack cannot work continuously, the control circuit switches to the standby battery to work.
The battery output and voltage current detection circuit is used for transmitting the output electric energy of the standby battery switching circuit to external electric equipment, and is also used for detecting an output voltage current signal and transmitting the detected output voltage current signal to the control circuit.
The high-frequency switching power supply main circuit is sequentially switched from a first charging mode to a second charging mode according to a charging control signal, and then is switched from the second charging mode to a third charging mode, the charging voltage of the first charging mode is limited within a first voltage, the charging current is fixed to a first current, the charging voltage of the second charging mode is fixed to the first voltage, the charging current of the third charging mode is fixed to a second current, and the second current is smaller than the first current.
Preferably, the first voltage is 1.2U, the first current is 0.2C, U is the rated voltage of the battery to be charged, C is the rated capacity of the battery to be charged, and the second current is 0.01C, for example, if the rated capacity is 1000mAH, the second current is 10 mA. The control circuit outputs a charging control signal to the high-frequency switching power supply main circuit according to the voltage and current signal, and the constant current/constant voltage/small constant current intelligent three-stage charging mode control is completed.
The first stage is as follows: firstly, the charging voltage is limited within 1.2 times of the battery voltage, the charging current is stabilized at 0.2C, and in the early stage of charging, the current is stabilized at 0.2C due to the lower battery voltage, and the charging voltage is lower than 1.2 times of the battery voltage, so that constant current charging is formed. When the battery output and voltage current detection circuit detects that the charging voltage is increased to 1.2 times of the battery voltage, the constant current charging is finished.
And a second stage: because the charging voltage is limited to 1.2 times of the battery voltage, after the battery voltage continues to rise, the charging current drops to below 0.2C, and the charging voltage is maintained at 1.2 times of the battery voltage, so that the constant-voltage charging is realized. As the battery charge increases, the charging current continues to decrease, and when it falls below 0.03C, the constant-voltage charging ends.
And a third stage: when the charging current is detected to be lower than 0.03C, the charging voltage is limited to be 1.1 times of the battery voltage, the charging current is stabilized at 0.01C, and charging in a small constant current mode is formed, so that the battery is prevented from being overcharged, the self-discharge loss of the battery is supplemented, and the mode can be operated for a long time without damage to the battery.
Preferably, the control circuit also protects the battery from reverse connection, undervoltage, overload and short circuit. The control circuit controls the standby battery switching circuit according to the output voltage current signal of the standby battery switching circuit. For example, if the control circuit judges overload, short circuit or reverse connection according to the output voltage and current signal of the standby battery switching circuit, the control circuit disconnects the standby battery switching circuit to enable the standby battery switching circuit not to supply power any more.
Preferably, the battery management system further comprises a temperature detection module for collecting the temperature of the external battery, and the temperature detection module is connected with the control circuit. The temperature detection module can be a temperature probe arranged in the main battery pack and the standby battery. The control circuit carries out over-temperature protection on the battery according to the received temperature signal. For example, if the control circuit judges that the temperature is too high, the control circuit disconnects the standby battery switching circuit to ensure that the standby battery switching circuit does not supply power any more.
Preferably, the battery management system further comprises a state display module for displaying the state of the external battery, and the state display module is connected with the control circuit. The control circuit transmits the battery state to the state display module so as to facilitate the understanding of the battery state by the working personnel.
An intelligent safety power supply of this embodiment, as shown in fig. 2 and 3, includes: the battery management system comprises a main battery pack (1), a standby battery (2) and the battery management system (3) of any one of the embodiments, wherein the main battery pack is connected with the fourth end of a standby battery switching circuit, and the standby battery is connected with the fifth end of the standby battery switching circuit.
Preferably, the safety power supply further comprises a housing (4) and a support (5) by which the primary battery pack, the backup battery and the battery management system are secured within the housing.
Preferably, the safety power supply further comprises a fixing support (6) and a fixing spring, one end of the fixing spring is in contact with the fixing support, and the other end of the fixing spring is in contact with the outer surface of the shell.
Fig. 2 and 3 show a possible specific implementation of the safety power supply. Comprises a fixed bracket, 4 upper fixed tension springs (7), 4 lower fixed tension springs (8) and 6 supporting pieces.
The fixed support can be a support used for fixing a power supply on the rail trolley.
The upper end of the upper fixing tension spring is connected with the upper surface of the fixing support, and the lower end of the upper fixing tension spring is connected with the upper surface of the shell.
The upper end of the lower fixing spring is connected with the lower surface of the shell, and the lower end of the lower fixing spring is connected with the lower surface of the fixing support.
The shell is used for installing the main battery pack, the standby battery and the intelligent battery management system to form a whole. The inside has 6 strutting pieces for fixed main battery group, backup battery, intelligent battery management system. The support piece can increase the overall connection rigidity of the power supply, is fixed in the shell and is connected with the main battery pack, the standby battery and the intelligent battery management system.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. An intelligent safety power supply, comprising: the system comprises a main battery pack, a standby battery and a battery management system; the battery management system comprises a rectification circuit, a high-frequency switching power supply main circuit, a battery output and voltage current detection circuit, a standby battery switching circuit and a control circuit;
the first end of the high-frequency switching power supply main circuit is connected with the rectifying circuit, the second end of the high-frequency switching power supply main circuit is connected with the first end of the control circuit, the third end of the high-frequency switching power supply main circuit is connected with the first end of the standby battery switching circuit, the second end of the standby battery switching circuit is connected with the second end of the control circuit, the third end of the standby battery switching circuit is connected with the first end of the battery output and voltage and current detection circuit, and the second end of the battery output and voltage and current detection circuit is connected with the third end of the control circuit;
the main battery pack is connected with the fourth end of the standby battery switching circuit, and the standby battery is connected with the fifth end of the standby battery switching circuit.
2. An intelligent safety power supply according to claim 1, further comprising a temperature detection module for collecting the temperature of the external battery, said temperature detection module being connected to said control circuit.
3. An intelligent safety power supply according to claim 1, further comprising a status display module for displaying the status of the external battery, said status display module being connected to said control circuit.
4. An intelligent safety power supply as claimed in claim 1, further comprising a housing and a support by which the primary battery pack, backup battery and battery management system are secured within the housing.
5. The intelligent safety power supply according to claim 4, further comprising a fixing bracket and a fixing spring, wherein one end of the fixing spring is in contact with the fixing bracket, and the other end of the fixing spring is in contact with the outer surface of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022063762.XU CN212909089U (en) | 2020-09-18 | 2020-09-18 | Intelligent safety power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022063762.XU CN212909089U (en) | 2020-09-18 | 2020-09-18 | Intelligent safety power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212909089U true CN212909089U (en) | 2021-04-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022063762.XU Active CN212909089U (en) | 2020-09-18 | 2020-09-18 | Intelligent safety power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212909089U (en) |
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2020
- 2020-09-18 CN CN202022063762.XU patent/CN212909089U/en active Active
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