CN219144256U - Energy storage control system and device for lead-acid lithium battery hybrid - Google Patents
Energy storage control system and device for lead-acid lithium battery hybrid Download PDFInfo
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- CN219144256U CN219144256U CN202223103216.XU CN202223103216U CN219144256U CN 219144256 U CN219144256 U CN 219144256U CN 202223103216 U CN202223103216 U CN 202223103216U CN 219144256 U CN219144256 U CN 219144256U
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- 239000002253 acid Substances 0.000 title claims abstract description 133
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 63
- 238000004146 energy storage Methods 0.000 title claims abstract description 26
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 94
- 238000004891 communication Methods 0.000 claims description 22
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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 provides a lead-acid lithium battery mixed energy storage control system, which comprises a lead-acid lithium electric control unit, a lead-acid battery unit, a lithium ion battery unit, a rectifier unit and a load; the first end of the lead-acid lithium ion battery unit is connected with the first end of the lead-acid battery unit, the first end of the lithium ion battery unit and the first end of the rectifier unit respectively; the second end of the lead-acid lithium ion battery unit is connected with the second end of the lead-acid battery unit, the second end of the lithium ion battery unit and the second end of the rectifier unit respectively; the first end of the rectifier unit is connected with the first end of the load, and the second end of the rectifier unit is connected with the second end of the load. The application also provides an energy storage control device for the mixed use of the lead-acid lithium battery. The method and the device can realize the pre-charge and pre-discharge of the lithium ion battery unit, thereby achieving the purpose of prolonging the service life of the lead-acid battery unit by utilizing the advantage of long cycle life of the lithium ion battery unit.
Description
Technical Field
The utility model belongs to the technical field of batteries, and particularly relates to an energy storage control system and device for mixed use of lead-acid lithium batteries.
Background
Currently, the main power energy storage systems on the market are lead-acid batteries and lithium ion batteries. The traditional lead-acid battery can be charged and discharged at low temperature, has good adaptability to overcharging of the battery, and can be charged in a floating way for a long time; however, the traditional lead-acid battery has low energy density, short service life, heavy volume, low operation efficiency and limited use environment. Lithium ion batteries have a longer life and higher energy density than lead acid batteries, but conventional lithium ion batteries have safety problems in charging at low temperatures and are afraid of overcharging and cannot be float charged for long periods of time.
Currently, lead-acid batteries are commonly used as backup power sources for power supply systems of communication base stations, however, with the development of lithium ion batteries, the excellent characteristics of lithium ion batteries make lithium ion batteries more suitable for communication base stations with high load demands, such as 5G base stations. At present, after the existing communication base station is upgraded, the original standby power supply lead-acid battery of the base station generally still has residual service life, so that the existing communication base station is modified by generally selecting a scheme of mixing the lithium ion battery and the lead-acid battery in order to reduce the waste of the battery and gradually replace the lead-acid battery, without affecting the service condition of the communication base station and avoiding large-scale planning reconstruction.
However, because the voltage platforms of the lithium ion battery and the lead-acid battery have larger difference, the situation that one of the lithium ion battery and the lead-acid battery is discharged completely and the other of the lithium ion battery and the lead-acid battery is also quite much charged easily occurs when the lithium ion battery and the lead-acid battery are directly connected in parallel, and when the voltages of the lithium ion battery and the lead-acid battery are inconsistent, the battery with high voltage is charged like the battery with low voltage, and the charging current is uncontrolled, so that the battery is quite damaged. Therefore, the mixed use of lead-acid lithium batteries has a large technical barrier. At present, the traditional lead-acid lithium battery mixed use technology cannot be used for a lithium battery completely preferentially, and the lead-acid battery and the lithium battery are charged and discharged simultaneously, so that the traditional lead-acid lithium battery mixed use technology has a large defect.
Disclosure of Invention
The embodiment of the utility model provides an energy storage control system and device for mixed use of lead-acid lithium batteries, and aims to solve the problems that the existing mixed use technology of lead-acid lithium batteries cannot be used for the lithium batteries preferentially, the lead-acid batteries are not used or are used less, and the lead-acid batteries and the lithium batteries are charged and discharged simultaneously.
In order to achieve the above purpose, in one aspect, an embodiment of the present utility model provides a hybrid energy storage control system for a lead-acid lithium battery, including a lead-acid lithium electric control unit, a lead-acid battery unit, a lithium ion battery unit, a rectifier unit, and a load;
the first end of the lead-acid lithium ion battery unit is connected with the first end of the lead-acid battery unit, the first end of the lithium ion battery unit and the first end of the rectifier unit respectively;
the second end of the lead-acid lithium ion battery unit is connected with the second end of the lead-acid battery unit, the second end of the lithium ion battery unit and the second end of the rectifier unit respectively;
the first end of the rectifier unit is connected with the first end of the load, and the second end of the rectifier unit is connected with the second end of the load.
As a preferred embodiment, the lead-acid lithium electric control unit is provided with a relay for controlling the charging and discharging loop of the lead-acid battery unit; the first end of the relay is connected with the first end of the lead-acid battery unit, and the second end of the relay is connected with the second end of the lead-acid lithium electric control unit.
In a preferred embodiment, the relay is a relay for controlling the on-off of the charge-discharge loop of the lead-acid battery unit according to the battery voltage of the lithium ion battery unit. When the battery voltage of the lithium ion battery unit reaches the cut-off voltage (such as 42V) of the battery, the relay is turned on, and the lead-acid battery unit starts to discharge; when the lead-acid battery cell is discharged, the relay is turned off. When charging, charging the lithium ion battery unit is prioritized, and the relay is disconnected at the moment; after the lithium ion battery unit is fully charged, the relay is turned on, and the lead-acid battery unit is charged.
As a preferred embodiment, the lead-acid lithium electronic control unit is further provided with a BMS assembly for controlling the lithium ion battery unit, and the BMS assembly is in communication connection with the lithium ion battery unit.
As a preferred embodiment, the BMS assembly is communicatively connected to the lithium ion battery cell via an RS485 communication protocol. Thus, the battery voltage of the lithium ion battery unit can be obtained through communication between the BMS component and the lithium ion battery unit, and then the on and off of the relay can be judged through the battery voltage, and finally the pre-charge and the pre-discharge of the lithium ion battery unit are realized.
In a preferred embodiment, the first ends are all positive connection ends, and the second ends are all negative connection ends.
On the other hand, the embodiment of the utility model also provides an energy storage control device for the mixed use of the lead-acid lithium battery, which comprises the energy storage control system for the mixed use of the lead-acid lithium battery and a charging power supply, wherein the first end of the charging power supply is connected with the first end of the lead-acid lithium electric control unit, and the second end of the charging power supply is connected with the second end of the lead-acid lithium electric control unit.
As a preferred embodiment, the charging power source is an uninterruptible power supply (Uninterruptible Power Supply, UPS) or a communication base station.
In a preferred embodiment, the connection is via a 2-BVR35 wire connection. The wiring is fixed and flexible, and the device can be suitable for various power devices.
The working process and control logic of the circuit of the application are as follows:
in the embodiment of the application, the positive electrode and the negative electrode of the lead-acid lithium electric control unit are connected to the positive electrode and the negative electrode of the lead-acid battery unit, so that the lead-acid battery unit supplies power to the lead-acid lithium electric control unit; then connecting the lithium ion battery unit and the lead-acid battery unit in parallel; the lead-acid lithium battery control unit is provided with a BMS component, the battery voltage of the lithium ion battery unit can be obtained through communication (RS 485 communication protocol) between the BMS component and the lithium ion battery unit, and then the on and off of the relay can be judged through the battery voltage (for example, when the voltage of the lithium ion battery unit does not reach a set value, the relay is disconnected, so that the lithium ion battery unit discharges firstly, when the voltage of the lithium ion battery unit reaches the set value, the relay is communicated, the lead-acid battery unit starts to discharge, and when the lead-acid battery unit discharges completely, the relay is disconnected, and when the lithium ion battery unit charges preferentially, the lithium ion battery unit charges firstly, and finally the lithium ion battery unit is charged firstly.
The embodiment of the utility model has the following beneficial effects: the positive electrode and the negative electrode of the lead-acid lithium electric control unit are connected to the positive electrode and the negative electrode of the lead-acid battery unit, so that the lead-acid battery unit supplies power to the lead-acid lithium electric control unit; then connecting the lithium ion battery unit and the lead-acid battery unit in parallel; the lead-acid lithium electric control unit is provided with a BMS component, and the battery voltage of the lithium ion battery unit can be obtained through communication of the BMS component and the lithium ion battery unit, and then the on and off of the relay can be judged through the battery voltage, and finally the purpose of pre-charging and pre-discharging of the lithium ion battery unit is achieved, so that the purpose of prolonging the service life of the lead-acid battery unit by utilizing the advantage of long cycle life of the lithium ion battery unit is achieved.
Drawings
FIG. 1 is a schematic diagram of a lead-acid lithium battery hybrid energy storage control system according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a hybrid energy storage control device for a lead-acid lithium battery according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It will be understood that when an element is referred to as being "fixed" 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 of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
At present, because the voltage platforms of the lithium ion battery and the lead-acid battery have larger difference, the situation that one of the lithium ion battery and the lead-acid battery is discharged quickly and the other of the lithium ion battery and the lead-acid battery is also provided with a plurality of electricity is easy to occur when the lithium ion battery and the lead-acid battery are used in parallel, and when the voltage of the lithium ion battery and the lead-acid battery is inconsistent, the battery with high voltage is charged like the battery with low voltage, and the charging current is uncontrolled, if the charging current is overlapped with the charging current of the generator, the battery is greatly damaged. Therefore, the mixed use of lead-acid lithium batteries has a large technical barrier. At present, the traditional lead-acid lithium battery mixed use technology cannot be used for a lithium battery completely preferentially, and the lead-acid battery and the lithium battery are charged and discharged simultaneously, so that the traditional lead-acid lithium battery mixed use technology has a large defect. In order to solve the technical problems, the utility model provides a hybrid energy storage control system and device for a lead-acid lithium battery, and aims to solve the problems that the conventional hybrid use technology of the lead-acid lithium battery cannot be used for the lithium battery completely preferentially, the lead-acid battery is not used or is used less, and the lead-acid battery and the lithium battery are charged and discharged simultaneously.
In the embodiments of the present application, unless otherwise specified, "first" means a positive electrode and "second" means a negative electrode, except for the element division sequence.
Specifically, in one aspect, an embodiment of the present utility model provides a hybrid energy storage control system for a lead-acid lithium battery, including a lead-acid lithium electric control unit 10, a lead-acid battery unit 20, a lithium ion battery unit 30, a rectifier unit 40 and a load 50;
the first end of the lead-acid lithium-ion battery unit 10 is connected to the first end of the lead-acid battery unit 20, the first end of the lithium-ion battery unit 30, and the first end of the rectifier unit 40, respectively;
a second end of the lead-acid lithium-ion battery control unit 10 is connected to a second end of the lead-acid battery unit 20, a second end of the lithium-ion battery unit 30, and a second end of the rectifier unit 40, respectively;
the first end of the rectifier unit 40 is connected to the first end of the load 50, and the second end of the rectifier unit 40 is connected to the second end of the load 50.
As a preferred embodiment, the lead-acid lithium electric control unit 10 is provided with a relay KM1 for controlling the charge-discharge circuit of the lead-acid battery unit 20; a first end of the relay KM1 is connected to a first end of the lead-acid battery unit 20, and a second end of the relay KM1 is connected to a second end of the lead-acid lithium electronic control unit 10.
As a preferred embodiment, the relay KM1 is a relay for controlling the on/off of the charge/discharge circuit of the lead-acid battery unit 20 according to the battery voltage of the lithium ion battery unit 30. When the battery voltage of the lithium ion battery unit 30 reaches the cut-off voltage (such as 42V) of the battery, the relay KM1 is turned on, and the lead-acid battery unit 20 starts discharging; when the lead-acid battery cell 20 is discharged, the relay KM1 is turned off. During charging, the lithium ion battery unit 30 is charged preferentially, and at the moment, the relay KM1 is disconnected; after the lithium ion battery unit 30 is fully charged, the relay KM1 is turned on, and the lead-acid battery unit 20 is charged.
As a preferred embodiment, the lead-acid lithium electronic control unit 10 is further provided with a BMS assembly (not identified in the figure) for controlling the lithium ion battery unit 30, which is communicatively connected to the lithium ion battery unit 30.
As a preferred embodiment, the BMS assembly is communicatively connected to the lithium ion battery cell 30 via an RS485 communication protocol. In this way, the battery voltage of the lithium ion battery unit 30 can be obtained through the communication between the BMS component and the lithium ion battery unit 30, and then the on and off of the relay KM1 can be judged through the battery voltage, and finally the pre-charge and the pre-discharge of the lithium ion battery unit 30 are realized.
In a preferred embodiment, the first ends are all positive connection ends, and the second ends are all negative connection ends.
On the other hand, the embodiment of the utility model also provides an energy storage control device for the hybrid lithium-ion battery, which comprises the energy storage control system 100 for the hybrid lithium-ion battery and a charging power supply 200, wherein a first end of the charging power supply 200 is connected with a first end of the rectifier unit, and a second end of the charging power supply is connected with a second end of the rectifier unit.
As a preferred embodiment, the charging power source is an uninterruptible power supply (Uninterruptible Power Supply, UPS) or a communication base station.
In a preferred embodiment, the connection is via a 2-BVR35 wire connection. The wiring is fixed and flexible, and the device can be suitable for various power devices.
Specifically, the working process and control logic of the circuit of the present application are as follows: in the embodiment of the application, the positive electrode and the negative electrode of the lead-acid lithium electric control unit are connected to the positive electrode and the negative electrode of the lead-acid battery unit, so that the lead-acid battery unit supplies power to the lead-acid lithium electric control unit; then connecting the lithium ion battery unit and the lead-acid battery unit in parallel; the lead-acid lithium battery control unit is provided with a BMS component, the battery voltage of the lithium ion battery unit can be obtained through communication (RS 485 communication protocol) between the BMS component and the lithium ion battery unit, and then the on and off of the relay can be judged through the battery voltage (for example, when the voltage of the lithium ion battery unit does not reach a set value, the relay is disconnected, so that the lithium ion battery unit discharges firstly, when the voltage of the lithium ion battery unit reaches the set value, the relay is communicated, the lead-acid battery unit starts to discharge, and when the lead-acid battery unit discharges completely, the relay is disconnected, and when the lithium ion battery unit charges preferentially, the lithium ion battery unit charges firstly, and finally the lithium ion battery unit is charged firstly.
The embodiment of the utility model has the following beneficial effects: the positive electrode and the negative electrode of the lead-acid lithium electric control unit are connected to the positive electrode and the negative electrode of the lead-acid battery unit, so that the lead-acid battery unit supplies power to the lead-acid lithium electric control unit; then connecting the lithium ion battery unit and the lead-acid battery unit in parallel; the lead-acid lithium electric control unit is provided with a BMS component, and the battery voltage of the lithium ion battery unit can be obtained through communication of the BMS component and the lithium ion battery unit, and then the on and off of the relay can be judged through the battery voltage, and finally the purpose of pre-charging and pre-discharging of the lithium ion battery unit is achieved, so that the purpose of prolonging the service life of the lead-acid battery unit by utilizing the advantage of long cycle life of the lithium ion battery unit is achieved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (9)
1. The mixed energy storage control system for the lead-acid lithium battery is characterized by comprising a lead-acid lithium electric control unit, a lead-acid battery unit, a lithium ion battery unit, a rectifier unit and a load;
the first end of the lead-acid lithium ion battery unit is connected with the first end of the lead-acid battery unit, the first end of the lithium ion battery unit and the first end of the rectifier unit respectively;
the second end of the lead-acid lithium ion battery unit is connected with the second end of the lead-acid battery unit, the second end of the lithium ion battery unit and the second end of the rectifier unit respectively;
the first end of the rectifier unit is connected with the first end of the load, and the second end of the rectifier unit is connected with the second end of the load.
2. The hybrid energy storage control system of lead-acid lithium battery according to claim 1, wherein the lead-acid lithium battery control unit is provided with a relay for controlling a charge-discharge loop of the lead-acid battery unit; the first end of the relay is connected with the first end of the lead-acid battery unit, and the second end of the relay is connected with the second end of the lead-acid lithium electric control unit.
3. The hybrid energy storage control system of lead-acid lithium battery of claim 2, wherein the relay is a relay for controlling the on-off of a charge-discharge loop of the lead-acid battery cell according to the battery voltage of the lithium ion battery cell.
4. The lead-acid lithium battery hybrid energy storage control system of claim 3, wherein the lead-acid lithium electronic control unit is further provided with a BMS assembly for controlling the lithium ion battery cell, the BMS assembly being in communication connection with the lithium ion battery cell.
5. The lead-acid lithium battery hybrid energy storage control system of claim 4, wherein the BMS component is communicatively coupled to the lithium ion battery cell via an RS485 communication protocol.
6. The hybrid energy storage control system of claim 2, wherein the first ends are positive connection ends and the second ends are negative connection ends.
7. The energy storage control device for the mixed use of the lead-acid lithium battery is characterized by comprising the energy storage control system for the mixed use of the lead-acid lithium battery and a charging power supply according to any one of claims 1 to 6, wherein a first end of the charging power supply is connected with a first end of the rectifier unit, and a second end of the charging power supply is connected with a second end of the rectifier unit.
8. The hybrid energy storage control device of claim 7, wherein the charging power source is an uninterruptible power supply or a communication base station.
9. The hybrid lithium-ion battery energy storage control device of claim 7, wherein the connection is via a 2-BVR35 wire connection.
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| CN202223103216.XU CN219144256U (en) | 2022-11-22 | 2022-11-22 | Energy storage control system and device for lead-acid lithium battery hybrid |
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| CN202223103216.XU CN219144256U (en) | 2022-11-22 | 2022-11-22 | Energy storage control system and device for lead-acid lithium battery hybrid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115863803A (en) * | 2022-11-22 | 2023-03-28 | 深圳市雄韬电源科技股份有限公司 | Lead-acid lithium battery hybrid energy storage control system and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115863803A (en) * | 2022-11-22 | 2023-03-28 | 深圳市雄韬电源科技股份有限公司 | Lead-acid lithium battery hybrid energy storage control system and device |
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