CN214100911U - Battery management system and device - Google Patents
Battery management system and device Download PDFInfo
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- CN214100911U CN214100911U CN202023072194.6U CN202023072194U CN214100911U CN 214100911 U CN214100911 U CN 214100911U CN 202023072194 U CN202023072194 U CN 202023072194U CN 214100911 U CN214100911 U CN 214100911U
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Abstract
The utility model discloses a battery management system, which comprises a first relay, a second relay, a fuse, a resistor, a diode, a first battery connecting end and a first charging power supply connecting end; the first battery connecting end is connected with a first end of the fuse, a second end of the fuse is connected with a first end of the first relay, and a second end of the first relay is connected with the first charging power supply connecting end; after the second relay is connected with the resistor in series, one end of the second relay is connected with the first end of the first relay, and the other end of the second relay is connected with the second end of the first relay; the first end of the diode is connected with the first end of the first relay, and the second end of the diode is connected with the second end of the first relay. The utility model also provides a battery management device. The battery management system has the advantages that the size of the battery management system is effectively reduced, and the space utilization rate of the system is increased.
Description
Technical Field
The utility model belongs to the technical field of the battery, especially, relate to a battery management system and device. The battery management system can be suitable for a high-voltage, medium-low Power Uninterruptible Power Supply (UPS) or an energy storage system, is low in cost, occupies a small volume, and has a high space utilization rate.
Background
With the wide application of new energy electric vehicles, the capacity, safety, health status and endurance of batteries increasingly become important concerns. A Battery Management System (BMS), commonly called a Battery caregiver or a Battery manager, is a System for monitoring and controlling a Battery and mainly used for intelligently managing and maintaining each Battery cell, preventing the Battery from being overcharged or overdischarged, prolonging the service life of the Battery, and monitoring the state of the Battery. The battery management system can feed back the acquired battery information to a user in real time, and meanwhile, parameters are adjusted according to the acquired information, so that the performance of the battery is fully exerted. Conventional battery management systems include various components such as circuit breakers, relays, diodes, hall elements, etc. The traditional battery management system has more integrated power elements and complex control logic, so the traditional battery management system has larger volume and higher cost.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a battery management system and device aims at solving the battery management system that traditional applied well high voltage, medium and small power, integrated form UPS used battery and accounts for the proportion of system cost and is high under, and the shared volume is great simultaneously, problem that space utilization is not high.
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 relay, a second relay, a fuse, a resistor, a diode, a first battery connection terminal, and a first charging power connection terminal;
the first battery connecting end is connected with a first end of the fuse, a second end of the fuse is connected with a first end of the first relay, and a second end of the first relay is connected with the first charging power supply connecting end;
after the second relay is connected with the resistor in series, one end of the second relay is connected with the first end of the first relay, and the other end of the second relay is connected with the second end of the first relay;
the first end of the diode is connected with the first end of the first relay, and the second end of the diode is connected with the second end of the first relay.
Further, the battery management system further comprises a high-voltage module and an AC power supply module, wherein the output end of the high-voltage module is connected with the AC power supply module, and the input end of the high-voltage module is connected with the first charging power supply connecting end.
Furthermore, the battery management system further comprises a second battery connecting end, a second charging power supply connecting end and a Hall element, wherein the Hall element is connected between the second battery connecting end and the second charging power supply connecting end, and the second charging power supply connecting end is connected with the second end of the high-voltage module.
Furthermore, the battery management system further comprises a FRONT adapter plate, and the FRONT adapter plate is connected with the AC power supply module.
Further, the output voltage of the FRONT adapter plate is 24V.
Furthermore, the battery management system also comprises a dry contact and a control module for protecting the battery management system, wherein the dry contact is connected with the control module, the control module is connected with the AC power supply module, and the control module is linked with the charging power supply to receive a signal of the charging power supply.
Further, the connection is connected by a 2-BVR16 wire.
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; and a charging power supply connecting end of the battery management system is connected with the charging power supply.
Further, the charging power supply is an uninterruptible power supply.
Further, the battery connection end of the battery management system is used for connecting a lithium battery.
Implement the embodiment of the utility model provides a, following beneficial effect has:
the technical scheme of the utility model, realize the safety protection of battery management system under emergency through the fuse, make battery management system can continue to discharge under the charge protection state through first relay and diode, guarantee battery management system's power supply safety for this application can be applied to high pressure, medium and small power and on the load equipment that integrates. The control logic of the battery management system is simple, the size of the battery management system is effectively reduced, and the space utilization rate of the system is increased.
And the battery management system and the UPS communicate through a dry contact, so that the breaker of the UPS is tripped through the battery management system in an emergency state, and the system safety is guaranteed.
In addition, the battery management system can be deeply integrated with the UPS, and the viscosity of the UPS to the battery management system is increased. The structure of this application adopts 2-BVR16 wire to connect, and the fixed softness of wiring is applicable to the use of middle-size and small-size equipment.
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 system according to another 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.
In the traditional application, the battery management system of the lithium battery for the medium-low power and integrated UPS (uninterruptible power supply) and the battery management system of the lithium battery for the high-voltage and high-power UPS share the protection logic, so that the proportion of the battery management system of the lithium battery for the medium-low power and integrated UPS occupying the system cost is high, and the battery management system occupies a large volume (because the traditional circuit needs to charge and discharge the same port and different loops, and the elements such as a relay, a diode and the like are needed for charging and discharging so as to realize the charging and discharging protection, and the elements can continuously discharge (charge) during the charging (discharging) protection, but because the elements are doubled, the volume is large, the cost is high), the space utilization rate is low, and the market competition advantage is weak. Therefore, it is necessary to provide a battery management system to solve the above technical problems.
In the application, the circuit is communicated with the UPS, so that elements such as a diode, a relay and the like for realizing a discharging loop can be omitted, and continuous discharging can be realized during charging protection; and when discharging, the battery does not have discharge protection, and the discharge protection of the battery can be realized by stopping discharging through the UPS. Therefore, the original piece of this application is less than traditional circuit, so the volume is less, the cost is lower than traditional circuit.
In the present application, the remaining "first" except the first relay and the second relay means a positive electrode and the "second" means a negative electrode.
Fig. 1 is a schematic structural diagram of a battery management system according to an embodiment of the present invention. The embodiment of the utility model provides a battery management system, including first relay KM1, second relay KM5, fuse FU1, resistance R1, diode, first battery connection end B + and first charging source connection end P +;
the first battery connection terminal B + is connected with a first terminal of the fuse FU1, a second terminal of the fuse FU1 is connected with a first terminal of the first relay KM1, and a second terminal of the first relay KM1 is connected with the first charging power connection terminal P +;
after the second relay KM5 is connected with the resistor R1 in series, one end of the second relay KM5 is connected with the first end of the first relay KM1, and the other end of the second relay KM1 is connected with the second end of the first relay KM 1;
a first terminal of the diode is connected to the first terminal of the first relay KM1, and a second terminal of the diode is connected to the second terminal of the first relay KM 1.
In this embodiment, a first end of the second relay is connected to a first end of the first relay, a second end of the second relay is connected to a first end of the resistor, and a second end of the resistor is connected to a second end of the first relay; alternatively, in other embodiments,
the first end of resistance is connected the first end of first relay, and the second end of resistance is connected the first end of second relay, and the second end of second relay is connected the second end of first relay.
The first relay KM1 is used to control the communication between the first battery connection terminal B + and the first charging power supply connection terminal P +. When the first relay KM1 is closed, the first battery connection end B + and the first charging power supply connection end P + are communicated, and when the first relay KM1 is disconnected, the first battery connection end B + and the first charging power supply connection end P + are not communicated.
The second relay KM5 is used for controlling whether current passes through the resistor R1 or not, the second relay KM5 and the resistor R1 play a role in current limiting protection, the battery management system can continue to discharge in a charging protection state through the first relay and the diode (when charging protection occurs, the first relay KM1 is disconnected, a charger cannot charge the battery through the first charging power supply connecting end P + and the second charging connecting end P-), when the battery management system needs to discharge, the current can be discharged outside through the BVR16, and when the battery management system detects that current flows through the BVR16, the first relay KM1 is closed, so that the discharging of the battery management system is realized).
The fuse FU1 is connected between the first battery connection end B + and the first relay KM1 and used for realizing safety protection in a system emergency state (when the battery is extremely abnormal such as short circuit and the like and the current reaches the fuse value of the fuse, the fuse is fused, the battery management system is disconnected, and therefore safety protection of the battery management system is realized);
the diode is connected between the fuse FU1 and the first charging power supply connecting end P + and is used for achieving the function that the system can continue discharging under the charging protection state of the battery system (when charging protection occurs, the first relay KM1 is disconnected, a charger cannot charge the battery through the first charging power supply connecting end P + and the second charging connecting end P-), when the battery management system needs to discharge, current can be discharged outside through the BVR16, and when the battery management system detects that the BVR16 has current, the first relay KM1 is closed, so that discharging of the battery management system is achieved, and power supply safety of the system is guaranteed.
Further, the battery management system further comprises a high-voltage module and an AC power supply module, wherein the output end of the high-voltage module is connected with the AC power supply module, and the input end of the high-voltage module is connected with the first charging power supply connecting end.
Specifically, in this embodiment, the positive output terminal of the high voltage module is connected to the positive input terminal (V0+) of the AC power module, and the negative output terminal of the high voltage module is connected to the negative input terminal (V0-) of the AC power module.
It should be noted that the AC power supply module is electrically connected to the high voltage module. The power module is a power converter that can be directly soldered and directly plugged on a circuit board, and is generally classified into AC to DC or DC to DC according to a conversion method, in this embodiment, the conversion method is AC to DC. With the development of science and technology, the power supply volume tends to modularization and miniaturization, so that a power supply module appears, the integration level is highest, and functions of broadband modulation, isolation, multiple protection and the like can be realized.
Further, fig. 2 is a battery management system according to another embodiment of the present invention, as shown in fig. 2, the battery management system further includes a second battery connection terminal, a second charging source connection terminal and a hall element, the hall element is connected between the second battery connection terminal and the second charging source connection terminal, and the second charging source connection terminal is connected to the second end of the high voltage module. A hall element may be used to detect the direction of the current.
In the embodiment of the present application, a charging and discharging protection device may also be disposed between the first relay KM1 and the first charging power connection terminal P +, and for example, the charging and discharging protection device may be a protection plate, a first end of the protection plate is connected to the first charging power connection terminal P +, and a second end of the protection plate is connected to the second charging power connection terminal P-.
The high voltage module is electrically connected with the protection board. The high-voltage module is a novel direct-current power supply device, is mainly applied to small-sized switch stations and user terminals, provides a reliable uninterrupted working power supply for a secondary control circuit, avoids microcomputer protection loss of protection when alternating current is lost, and solves the problem of microcomputer protection failure caused by UPS failure due to factors such as operation overvoltage and harmonic waves. And simultaneously, a direct-current operating power supply can be provided for primary switching equipment meeting the power requirement of the device. In this embodiment, the high voltage module connects the positive and negative poles of the power source led out through the protection board to the input terminal of the high voltage module, thereby obtaining an output of DC24V voltage for further processing thereafter.
Further, as shown in fig. 3, the battery management system of another embodiment, in this embodiment, the battery management system further includes a FRONT adapter board, and the FRONT adapter board is connected to the AC power module. Specifically, the positive output end of the AC power module is connected to the positive input end (24V) of the FRONT adapter plate, and the negative output end of the AC power module is connected to the Ground (GND) of the FRONT adapter plate.
Further, in this embodiment, the AC power module is electrically connected to the FRONT adapter board. The adapter board is generally used for debugging and maintenance, and is used for leading in or leading out signals so as to conveniently connect a test instrument or provide a signal source. In this embodiment, the adapter board is used as a transition device to finally output the voltages obtained after the above-mentioned various conversions in various forms and ways, so as to facilitate the communication of J4, LAN and dry contact.
Further, the output voltage of the FRONT adapter plate is 24V.
Further, in other embodiments, the battery management system further includes a dry contact and a control module for protecting the battery management system, the dry contact is connected to the control module, and the control module is connected to the AC power module; the control module is linked with the charging power supply and receives a signal of the charging power supply. In the application, the control module can realize the action of the related battery management system protection according to the parameter settings of the battery management system such as alarm, protection and the like and the internal set charge and discharge logic; the control module is also linked with a charging power supply (UPS) to receive signals of the UPS. The dry contact is used for communication between the battery management system and the UPS, and the breaker of the UPS is tripped through the battery management system in an emergency state (in the application, the dry contact is equivalent to a switching signal, and when the battery is abnormal, the dry contact firstly sends a signal to the UPS, so that the UPS is disconnected from a load or the UPS is powered off, the protection of the UPS is realized, and the system safety is guaranteed.
Further, in the examples of the present application, the connections are all connected by 2-BVR16 wires, unless otherwise specified. The structure of this application adopts 2-BVR16 wire to connect, and the fixed softness of wiring is applicable to the use of middle-size and small-size equipment.
The working process and control logic of the circuit of the application are as follows:
1. power-on self-test:
when the circuit is initially started, the test stage is first entered. At this time, the first relay is opened, and the second relay is closed. The current flows from the first battery connection terminal, through the second relay and the current limiting resistor, and finally to the first charging power supply connection terminal. When the battery is initially started, the direct-current bus and the battery may have large pressure difference, and the current limiting resistor is connected into the loop to reduce current, so that the impact of the large current on a battery management system is avoided, namely, the current limiting resistor can protect the circuit from being burnt out in a test stage.
2. A discharging mode:
after the power-on self-test is completed, the circuit enters a formal working stage. At this time, the first relay is closed and the second relay is opened. The current flows from the first battery connection, through the first relay, and finally to the first charging source connection. The battery begins to discharge and operate normally.
If the electric quantity in the battery is completely exhausted and reaches the set protection state, the battery sends a signal to the UPS, so that the UPS stops outputting, and the battery stops continuously discharging. At this time, the first relay is turned off, and the second relay is turned off.
3. Charging mode
If the battery is charged by the UPS, the first end of the UPS is connected with the first charging power supply connecting end, and the second end of the UPS is connected with the second charging power supply connecting end. The current flows from the first charging supply connection, through the first relay and finally to the first battery connection.
4. Charging protection
When charging protection occurs, the first relay KM1 is disconnected, and the charger cannot charge the battery through the first charging power supply connecting end P + and the second charging connecting end P-; when the battery management system needs to discharge, the current can be discharged to the outside through the BVR16, and when the battery management system detects that the current flows through the BVR16, the first relay KM1 is closed, so that the discharge of the battery management system is realized.
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; and a charging power supply connecting end of the battery management system is connected with the charging power supply. At this time, the dry contact is connected to the charging power source.
Further, the charging power supply is an uninterruptible power supply.
Further, the battery connection end of the battery management system is used for connecting a lithium battery.
In the technical scheme of the utility model, the safety protection of the battery management system under the emergency state is realized through the fuse (when the battery is extremely abnormal such as short circuit and the current reaches the fusing value of the fuse, the fuse is fused, the battery management system is broken circuit, thereby realizing the safety protection of the battery management system), the battery management system can continue to discharge under the charging protection state through the first relay and the diode (when the charging protection occurs, the first relay is disconnected, the charger can not charge the battery through the first charging power supply connecting end and the second charging connecting end, when the battery management system needs to discharge, the current can be discharged to the outside through the BVR16, when the battery management system detects that the BVR16 has the current, the first relay is closed, thereby realizing the discharging of the battery management system, and ensuring the power supply safety of the battery management system, the method and the device can be applied to high-voltage, medium-small power and integrated load equipment. The control logic of the application is simple, the volume of the battery management system is effectively reduced, the space utilization rate of the system is increased,
and, battery management system and UPS pass through the dry contact communication to the realization makes the circuit breaker dropout of UPS through battery management system under emergency (in this application, the dry contact is equivalent to switching signal, and when the battery was unusual, the dry contact was first sent the signal to UPS, makes UPS disconnection and load be connected or make UPS shut down, thereby realizes the protection to UPS), ensures system safety.
In addition, the battery management system and the UPS can be deeply integrated, the viscosity of the UPS to the battery management system is increased (the battery and the UPS can be communicated with each other, the battery sends a signal to the UPS when the battery needs to be protected by discharging because the BMS of the battery has no discharging loop protection, so that the UPS performs necessary actions to protect the battery by discharging, and when the UPS is abnormal, the UPS can send a signal to the battery to disconnect the battery from the UPS, so that the battery is protected).
This application when realizing intelligent management and maintaining each battery unit, can prevent that the battery from appearing overcharging and overdischarge, prolonging the life of battery and control battery etc. still reduced battery supply equipment's manufacturing cost by a wide margin, reduced the volume of equipment moreover, make equipment miniaturization, light change, effectively promoted the quality and the utility of the battery management system of this application.
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 relay, a second relay, a fuse, a resistor, a diode, a first battery connecting end and a first charging power supply connecting end;
the first battery connecting end is connected with a first end of the fuse, a second end of the fuse is connected with a first end of the first relay, and a second end of the first relay is connected with the first charging power supply connecting end;
after the second relay is connected with the resistor in series, one end of the second relay is connected with the first end of the first relay, and the other end of the second relay is connected with the second end of the first relay;
the first end of the diode is connected with the first end of the first relay, and the second end of the diode is connected with the second end of the first relay.
2. The battery management system of claim 1, further comprising a high voltage module and an AC power module, wherein an output of the high voltage module is connected to the AC power module, and an input of the high voltage module is connected to the first charging power connection terminal.
3. The battery management system of claim 2, further comprising a second battery connection terminal, a second charging power connection terminal, and a hall element, the hall element being connected between the second battery connection terminal and the second charging power connection terminal, the second charging power connection terminal being connected to the second terminal of the high voltage module.
4. The battery management system of claim 3, further comprising a FRONT adapter board that connects the AC power module.
5. The battery management system of claim 4, further comprising a dry contact and a control module for protecting the battery management system, the dry contact being connected to the control module, the control module being connected to the AC power module; the control module is linked with the charging power supply and receives a signal of the charging power supply.
6. The battery management system of any of claims 1 to 5, wherein the connection is by a 2-BVR16 wire.
7. The battery management system of claim 4, wherein the output voltage of the FRONT patch panel is 24V.
8. A battery management apparatus comprising the battery management system according to any one of claims 1 to 5 and a charging power supply; and a charging power supply connecting end of the battery management system is connected with the charging power supply.
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 8, wherein the battery connection terminals of the battery management system are configured to connect to a lithium battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023072194.6U CN214100911U (en) | 2020-12-19 | 2020-12-19 | Battery management system and device |
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| CN202023072194.6U CN214100911U (en) | 2020-12-19 | 2020-12-19 | Battery management system and device |
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| CN214100911U true CN214100911U (en) | 2021-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115833324A (en) * | 2022-12-26 | 2023-03-21 | 中国铁塔股份有限公司 | Charge-discharge control circuit and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115833324A (en) * | 2022-12-26 | 2023-03-21 | 中国铁塔股份有限公司 | Charge-discharge control circuit and electronic equipment |
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