CN212366901U - Battery management system and device - Google Patents
Battery management system and device Download PDFInfo
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- CN212366901U CN212366901U CN202022134278.1U CN202022134278U CN212366901U CN 212366901 U CN212366901 U CN 212366901U CN 202022134278 U CN202022134278 U CN 202022134278U CN 212366901 U CN212366901 U CN 212366901U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application discloses a battery management system, which comprises a first battery connecting end, a fuse, an overcharge protection unit, a first charging power supply connecting end, a second battery connecting end, a second charging power supply connecting end, a DC power supply module, a high-voltage module and an AC power supply; the first battery connecting end is connected with a first end of the fuse, a second end of the fuse is connected with one end of the overcharge protection unit, and the other end of the overcharge protection unit is connected with the first charging power supply connecting end; the second battery connecting end is respectively connected with the second charging power supply connecting end and the first output end of the DC power supply module, the input end of the DC power supply module is connected with the positive electrode of the output end of the high-voltage module, and the positive electrode of the battery end of the high-voltage module is connected with the overcharge protection unit; the AC power supply is connected with the first input end of the high-voltage module. The application also provides a battery management device. The UPS battery can be matched with other UPS batteries.
Description
Technical Field
The utility model belongs to the technical field of the battery, especially, relate to a battery management system and device.
Background
With the increasing demand for high performance technologies such as AI, cloud computing, big data, etc., data centers will become larger and more complex. As a core part of the data center, the reliability of an Uninterruptible Power Supply (UPS) and a battery is directly related to the normal operation of the data center. The lithium battery for the UPS has the advantages of safety, reliability, long service life, small occupied area, simple operation and maintenance and the like. UPS manufacturers in the market have started to use new lithium batteries widely, and lithium batteries for UPS are applied to data centers more and more.
The lithium Battery for the UPS is equipped with a Battery Management System (BMS), and can provide monitoring and maintenance functions such as automatic status inside the Battery, fault monitoring, Battery equalization, and external communication. The battery management system enables a data center operation and maintenance engineer to more easily monitor the operation time and health condition of the battery, reduces labor and maintenance costs, and significantly reduces the risk of battery pack failure.
In the conventional battery management system, a UPS supplies power to a lithium battery when the commercial power is cut off. After the lithium battery discharges, if the commercial power is not recovered, the UPS can not supplement the power to the lithium battery in time, and the voltage of the battery continues to be reduced due to the power consumption of the BMS until the battery is shut down. After the commercial power is recovered, the UPS can not charge the battery because the battery is shut down, the battery needs to be manually started, and the battery can be charged only by the UPS with a strong charging function.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a battery management system and device aims at solving current lithium cell and if untimely charging after having discharged, because BMS's consumption, the voltage of lithium cell lasts to reduce and finally leads to the lithium cell to shut down (perhaps trigger the secondary protection and jump empty), needs the fortune dimension personnel to carry out manual operation and just can reopen the lithium cell, requires UPS to have the strong problem that the function could charge to the lithium cell moreover.
In order to achieve the above object, in one aspect, the embodiment of the present invention provides a battery management system, which includes a first battery connection terminal, a fuse, an overcharge protection unit, a first charging power connection terminal, a second battery connection terminal, a second charging power connection terminal, a DC power module, a high-voltage module, and an AC power supply;
the first battery connecting end is connected with a first end of the fuse, a second end of the fuse is connected with one end of the overcharge protection unit, and the other end of the overcharge protection unit is connected with the first charging power supply connecting end;
the second battery connecting end is respectively connected with the second charging power supply connecting end and the first output end N of the DC power supply module, the input end of the DC power supply module is connected with the positive electrode of the output end of the high-voltage module, and the positive electrode of the battery end of the high-voltage module is connected with the overcharge protection unit;
the AC power supply is connected with the first input end of the high-voltage module.
Optionally, the output terminal of the DC power supply module is connected to the second input terminal of the high voltage module.
Optionally, the battery management system further includes a hall element, and the hall element is connected between the overcharge protection unit and the first charging power connection terminal.
Optionally, the battery management system further includes a communication display adapter plate, and the communication display adapter plate is connected to the first output end of the high-voltage module.
Optionally, the overcharge protection unit includes a first relay, a second relay, a third relay, a first diode, a second diode, and a resistor;
after the first relay and the second relay are connected in series, one end of the first relay is connected with the first battery connecting end, and the other end of the first relay is connected with the first charging power supply connecting end;
after the third relay and the resistor are connected in series, one end of the third relay is connected with the first battery connecting end, and the other end of the third relay is connected with the first charging power supply connecting end;
one end of the first diode and one end of the second diode after being connected in series are connected with the first battery connecting end, and the other end of the first diode is connected with the first charging power supply connecting end;
and the second end of the first diode is connected with the first end of the second relay.
Optionally, the battery terminal positive electrode of the high voltage module is connected between the first relay and the second relay.
Optionally, the first charging power connection end is connected to the first voltage detection end of the high voltage module, and the second charging power connection end is connected to the second voltage detection end of the high voltage module.
On the other hand, the embodiment of the utility model provides a still provide a battery management device, include battery management system and charging source, charging source connects battery management system's charging source link.
Optionally, the charging Power Supply is an Uninterruptible Power Supply (UPS).
Optionally, the battery connection terminal of the battery management system is used for connecting a lithium battery.
Optionally, the connection is through a 2-BVR35 wire. The wiring is fixed and flexible, and can be suitable for various power devices.
Implement the embodiment of the utility model provides a, following beneficial effect has:
the utility model discloses a set up the fuse between first battery link and overcharge protection unit for the battery management system of this application can satisfy bigger electric current, and the function no longer requires to the UPS function of charging by force, uses the lithium cell of this application BMS can use with the UPS supporting that the power level is higher.
In addition, this application passes through the start-up of AC power signal control battery management unit BMS, has solved the battery and has discharged the back, and BMS needs manual start-up and requires that UPS has the problem of strong function of charging when electrifying again because the consumption leads to shutting down. Adopt new BMS's battery, after the battery is discharged, no longer need manual opening after the BMS cuts off the power supply. After the commercial power resumes, the BMS is automatically started up, and the UPS can charge the battery. In the actual working condition environment, the operation of operation and maintenance personnel is simplified. The utility model discloses can satisfy the supporting use between battery and all UPS.
Drawings
Fig. 1 is a schematic structural diagram of a battery management system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery management system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery management device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Currently, the existing battery management systems have the following disadvantages: when the mains supply is powered off, the UPS supplies power to the lithium battery. After the lithium battery discharges, if the commercial power is not recovered, the UPS can not supplement the power to the lithium battery in time, and the voltage of the battery continues to be reduced due to the power consumption of the BMS until the battery is shut down. After the commercial power is recovered, the UPS can not charge the battery because the battery is shut down, the battery needs to be manually started, and the battery can be charged only by the UPS with a strong charging function. In order to solve the technical problem, the utility model provides a battery management system, after the commercial power resumes, the battery can start automatically, and UPS can charge, need not the requirement of charging by force.
In the present application, unless otherwise specified, the "first" and "second" except for the first relay, the second relay, and the like, which represent the element division serial numbers, represent the positive electrode and the negative electrode, respectively.
As shown in fig. 1, an embodiment of the present invention provides a battery management system, which includes a first battery connection terminal B +, a fuse FU1, an overcharge protection unit 10, a first charging power connection terminal P +, a second battery connection terminal B-, a second charging power connection terminal P-, a DC power module 20, a high voltage module 30, and an AC power supply;
the first battery connecting end B + is connected with the first end of the fuse FU1, the second end of the fuse FU1 is connected with one end of the overcharge protection unit 10, and the other end of the overcharge protection unit 10 is connected with the first charging power supply connecting end P +;
the second battery connection end B-is respectively connected to the second charging power connection end P-, and the first output end N of the DC power module 20, the input end L of the DC power module 20 is connected to the positive electrode C + end of the output end of the high voltage module 30, and the positive electrode DC + end of the battery end of the high voltage module 30 is connected to the overcharge protection unit 10; the C + end/DC + end is two ends (equivalent to a small switch) of a small relay on the high-voltage module, the two ends are electrified and conducted, the relay is closed, and power is supplied to the high-voltage module; the two ends are powered down, and the relay is disconnected.
The AC power source is connected to the first input terminal L of the high voltage module 30.
In the present application, fuse FU1 is mainly used to prevent circuit damage caused by excessive current, and can satisfy the requirement of larger current for the circuit. Illustratively, the output VO + of the DC power module 20 is connected to the second input 31 of the high voltage module 30.
Exemplarily, as shown in fig. 2, in another embodiment, the battery management system further includes a hall element connected between the overcharge protection unit 10 and the first charging power connection terminal P +. The hall element is mainly used for detecting the current on-off condition.
Illustratively, as shown in fig. 2, in this embodiment, the battery management system further includes a communication display adapter board 40, and the communication display adapter board 40 is connected to the first output end 32 of the high voltage module 30. The communication display adapter plate 40 is used for displaying and monitoring the working state of the battery in real time.
Specifically, as shown in fig. 2, in this embodiment, the overcharge protection unit includes a first relay KM1, a second relay KM3, a third relay KM5, a first diode VD1, a second diode VD2, and a resistor R1;
after the first relay KM1 and the second relay KM3 are connected in series, one end of the first relay KM1 is connected with the first battery connection end B +, and the other end of the first relay KM3 is connected with the first charging power supply connection end P +;
after the third relay KM5 and the resistor R1 are connected in series, one end of the third relay KM5 is connected with the first battery connection end B +, and the other end of the third relay KM5 is connected with the first charging power supply connection end P +;
one end of the first diode VD1, which is connected in series with the second diode VD2, is connected with the first battery connection end B +, and the other end of the first diode VD2 is connected with the first charging power supply connection end P +;
a second terminal of the first diode VD1 is connected to a first terminal of the second relay KM 3. That is, the second terminal of the second diode VD2 is connected to the first terminal of the first relay KM 1. In this way, the current at the input end and the current at the output end are respectively introduced into the on-off branches of the first relay KM1 and the second relay KM3, so as to detect the respective on-off conditions of the input end and the output end of the circuit.
It should be noted that, after the first relay KM1 and the second relay KM3 are connected in series, one end of the first relay is connected to the first battery connection terminal B +, and the other end of the first relay is connected to the first charging power connection terminal P +; specifically, in this embodiment, a first end of the first relay KM1 is connected to the first battery connection terminal B +, a second end of the first relay KM1 is connected to a first end of the second relay KM3, and a second end of the second relay KM3 is connected to the first charging power connection terminal P +.
Or, in other embodiments, the first end of the second relay KM3 is connected to the first battery connection terminal B +, the second end of the second relay KM3 is connected to the first end of the first relay KM1, and the second end of the first relay KM1 is connected to the first charging power connection terminal P +.
It should be noted that, after the third relay KM5 and the resistor R1 are connected in series, one end of the third relay KM5 is connected to the first battery connection end B +, and the other end of the third relay KM5 is connected to the first charging power connection end P +; specifically, in this embodiment, a first end of the third relay KM5 is connected to the first battery connection terminal B +, a second end of the third relay KM5 is connected to a first end of the resistor R1, and a second end of the resistor R1 is connected to the first charging power connection terminal P +.
Alternatively, in another embodiment, a first end of the resistor R1 is connected to the first battery connection terminal B +, a second end of the first resistor R1 is connected to a first end of the third relay KM5, and a second end of the third relay KM5 is connected to the first charging power connection terminal P +.
It should be noted that, after the first diode VD1 and the second diode VD2 are connected in series, one end of the first diode is connected to the first battery connection end B +, and the other end of the first diode is connected to the first charging power connection end P +; specifically, in this embodiment, the first terminal of the first diode VD1 is connected to the first battery connection terminal B +, the second terminal of the first diode VD1 is connected to the first terminal of the second diode VD2, and the second terminal of the second diode VD2 is connected to the first charging power connection terminal P +.
Or, in other embodiments, the first end of the second diode VD2 is connected to the first battery connection terminal B +, the second end of the second diode VD2 is connected to the first end of the first diode VD1, and the second end of the first diode VD1 is connected to the first charging power connection terminal P +.
In this embodiment, the current limiting resistor is used to limit the current of the battery management system when the battery management system is just turned on and no fault determination is performed, so as to turn on the whole circuit during power-on self-detection, and perform current limiting protection on the circuit by using the resistor.
The first diode is used for detecting the fault of the battery input end by the current led into the end of the first battery connecting end, and the second diode is used for detecting the fault of the charging power supply output end by the current led into the end of the first charging power supply connecting end.
Optionally, the battery-side positive DC + terminal of the high-voltage module 30 is connected between the first relay KM1 and the second relay KM 3.
Optionally, the first charging source connection terminal P + is connected to the first voltage detection terminal of the high voltage module 30, and the second charging source connection terminal P-is connected to the second voltage detection terminal of the high voltage module 30. Thus, the voltage of the bus can be detected when the load does not work.
On the other hand, as shown in fig. 3, another embodiment of the present invention further provides a battery management device, including the battery management system 100 and the charging source 200, wherein the charging source 200 is connected to the charging source connection terminal of the battery management system 100.
Optionally, the charging power supply 200 is an uninterruptible power supply.
Optionally, the battery connection terminal of the battery management system 100 is used for connecting the lithium battery 300.
Optionally, the connection is through a 2-BVR35 wire. The wiring is fixed and flexible, and can be suitable for various power devices. The working process and control logic of the circuit of the application are as follows:
1. battery transport and testing procedure:
the DC starting button switch is pressed to start the system, the power supply is switched on, the indicator light flickers, the system enters a self-checking state, if no fault exists, the relay KM1/KM3 is attracted, the system enters a standby state, and if the fault exists, the relay KM1/KM3 is not attracted. (the precharge circuit control relay KM5 was first turned on at power-on and then turned off after self-test). And the DC start button switch is pressed for more than 5 seconds, the power supply is disconnected, the indicator light is turned off, and the system enters a shutdown state. This method does not access the AC.
2. Operating mode (power on/off control logic) between battery and UPS:
inserting the AC into an AC hole of the BMS, accessing an AC220V electric signal, starting the battery, switching on the power supply, flashing an indicator light, enabling the system to enter a self-checking state, enabling the relay KM1/KM3 to attract when no fault exists, enabling the system to enter a standby state, and enabling the relay KM1/KM3 not to attract when the fault exists. (the precharge circuit control relay KM5 was first turned on at power-on and then turned off after self-test). The AC plug is pulled out, so that the BMS cannot receive the 220V electric signal, the battery power supply is disconnected, the indicator light is turned off, and the system enters a power-off state. This method does not switch in DC.
In this application, AC220V is an electric signal for controlling the turn-on of the BMS instead of charging the BMS. After the battery is discharged, if the battery is not charged in time, the BMS is shut down when the battery power or voltage reaches a certain value due to the fact that the BMS continuously consumes the battery power; when the BMS is shut down, the positive and negative terminals of the battery can not detect voltage; after the mains supply is recovered, the UPS charges the battery, the battery cannot be charged due to the fact that the UPS cannot detect the voltage of the battery, and the battery can be charged only when the UPS with a strong charging function cannot detect the voltage of the battery. According to the battery charger, the AC220V is used as an electric signal, after the mains supply is recovered, the BMS is automatically started after receiving the AC220V signal, the battery has voltage at the moment, and the UPS can charge the battery by detecting the voltage of the battery; therefore, even if the UPS of the present application does not have a strong charging function, the battery can be charged.
3. And (3) fault judgment:
the KM1 relay is switched off by the protection caused by the charging process fault, the KM3 relay is switched off by the protection caused by the discharging process fault, and all relays are switched off by the protection caused by the fault in the standby state.
4. Under UPS and battery mode, after the battery discharges, the AC loses power, triggers BMS to power down, protects the battery. After the mains supply is recovered, the AC signal is connected into the BMS, the battery is automatically started, the UPS can charge the battery, the logic is suitable for the UPSs of all models, and the UPS is not required to have a strong charging function.
The utility model provides a battery discharge back, BMS because the consumption leads to shutting down, need manual start and require UPS to have the problem of the function of charging by force when going up again. Adopt new BMS's battery, after the battery discharged, the BMS was gone down to the electricity, and the commercial power resumes the back, and BMS is automatic to be started up, and UPS can charge to the battery. In the actual working condition environment, the operation of operation and maintenance personnel is simplified. The utility model discloses the function of charging by force to UPS no longer requires, can satisfy the supporting use between battery and all UPS.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A battery management system is characterized by comprising a first battery connecting end, a fuse, an overcharge protection unit, a first charging power supply connecting end, a second battery connecting end, a second charging power supply connecting end, a DC power supply module, a high-voltage module and an AC power supply;
the first battery connecting end is connected with a first end of the fuse, a second end of the fuse is connected with one end of the overcharge protection unit, and the other end of the overcharge protection unit is connected with the first charging power supply connecting end;
the second battery connecting end is respectively connected with the second charging power supply connecting end and the first output end of the DC power supply module, the input end of the DC power supply module is connected with the positive electrode of the output end of the high-voltage module, and the positive electrode of the battery end of the high-voltage module is connected with the overcharge protection unit;
the AC power supply is connected with the first input end of the high-voltage module.
2. The battery management system of claim 1, wherein the output of the DC power module is connected to the second input of the high voltage module.
3. The battery management system of claim 1, further comprising a hall element connected between the overcharge protection unit and the first charging power connection terminal.
4. The battery management system of claim 2, further comprising a communication display adapter board, wherein the communication display adapter board is connected to the first output terminal of the high voltage module.
5. The battery management system according to any one of claims 1 to 4, wherein the overcharge protection unit includes a first relay, a second relay, a third relay, a first diode, a second diode, and a resistor;
after the first relay and the second relay are connected in series, one end of the first relay is connected with the first battery connecting end, and the other end of the first relay is connected with the first charging power supply connecting end;
after the third relay and the resistor are connected in series, one end of the third relay is connected with the first battery connecting end, and the other end of the third relay is connected with the first charging power supply connecting end;
one end of the first diode and one end of the second diode after being connected in series are connected with the first battery connecting end, and the other end of the first diode is connected with the first charging power supply connecting end;
and the second end of the first diode is connected with the first end of the second relay.
6. The battery management system of claim 5, wherein a battery terminal positive of the high voltage module is connected between the first relay and the second relay.
7. The battery management system of claim 1, wherein the first charging power connection terminal is connected to a first voltage detection terminal of the high voltage module, and the second charging power connection terminal is connected to a second voltage detection terminal of the high voltage module.
8. A battery management device comprising the battery management system of any one of claims 1 to 4 and a charging power supply, wherein the charging power supply is connected to a charging power supply connection terminal of the battery management system.
9. The battery management apparatus of claim 8, wherein the charging power source is an uninterruptible power supply.
10. The battery management device of claim 9, wherein the battery connection terminals of the battery management system are configured to connect to a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022134278.1U CN212366901U (en) | 2020-09-25 | 2020-09-25 | Battery management system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022134278.1U CN212366901U (en) | 2020-09-25 | 2020-09-25 | Battery management system and device |
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| Publication Number | Publication Date |
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| CN212366901U true CN212366901U (en) | 2021-01-15 |
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| CN202022134278.1U Active CN212366901U (en) | 2020-09-25 | 2020-09-25 | Battery management system and device |
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| CN (1) | CN212366901U (en) |
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Denomination of utility model: A battery management system and device Effective date of registration: 20211129 Granted publication date: 20210115 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN CENTER POWER TECH. Co.,Ltd. Registration number: Y2021980013514 |