CN218958607U - Energy storage battery container system - Google Patents
Energy storage battery container system Download PDFInfo
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- CN218958607U CN218958607U CN202220931206.6U CN202220931206U CN218958607U CN 218958607 U CN218958607 U CN 218958607U CN 202220931206 U CN202220931206 U CN 202220931206U CN 218958607 U CN218958607 U CN 218958607U
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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
Abstract
The utility model relates to an energy storage battery container system, which is characterized by comprising a direct current conversion unit, an alternating current-direct current conversion unit, a direct current bus, a plurality of power controllers, a plurality of battery packs and an inversion output unit which are positioned in a container body, wherein the input end of the direct current conversion unit is connected with the output end of an external direct current power supply, the input end of the alternating current-direct current conversion unit is connected with the output end of the external alternating current power supply, the output end of the direct current conversion unit and the output end of the alternating current-direct current conversion unit are both connected with the inversion output unit through the direct current bus, and the battery packs are respectively connected with the direct current bus through corresponding power controllers.
Description
Technical Field
The utility model belongs to an energy storage control system, and relates to an energy storage battery container system.
Background
An energy storage container is a relatively common energy storage application system, for example, an electrical structure for an energy storage battery container disclosed in CN201510554037.3, which comprises: a battery assembly; an auxiliary device; the battery assembly is connected with the bus cabinet, the bus cabinet is connected with an external PCS, and then an isolation transformer is connected with an alternating current power grid through the PCS; the bus cabinet is also connected with the auxiliary equipment; and the external background monitoring is respectively connected with the bus cabinet and the PCS. The advantages are that: the service life of the battery is effectively prolonged through the battery management system, and the safety coefficient of the whole energy storage battery container is improved. The PCS is an energy storage converter, namely: power Conversion System, the charging and discharging processes of the storage battery can be controlled to perform alternating current-direct current conversion, and the power can be directly supplied to an alternating current load under the condition of no power grid. The PCS is composed of a DC/AC bidirectional converter, a control unit and the like. The PCS controller receives a background control instruction through communication, and controls the converter to charge or discharge the battery according to the sign and the size of the power instruction, so that the active power and the reactive power of the power grid are regulated. The PCS controller is communicated with the BMS through the CAN interface to acquire the state information of the battery pack, so that the battery CAN be charged and discharged in a protective manner, and the running safety of the battery is ensured.
As another example, CN202022650273.4 discloses a standard shipping container battery system that can be quickly replaced, comprising: the device comprises a box body, a battery module, a ventilation module, a fire protection module, a battery management module, a control module and a magnetic cable plug; the side wall of the box body is provided with at least one ventilation window, and the bottom of the box body is provided with a cover plate hole for accommodating a line concentration socket on a ship; the battery module comprises a plurality of groups of battery units; the ventilation module comprises a plurality of ventilation devices; the battery management module is connected with the battery module; the control module is used for acquiring working data of the ventilation module, the fire-fighting module and the battery management module and controlling working states of the ventilation module, the fire-fighting module and the battery module, and comprises a data output end which is used for outputting the working data; the magnetic cable plug is connected with different jacks on the line concentration socket in a butting mode. However, the prior art has a great room for improvement in various aspects such as state detection, fireproof isolation, charge-discharge synchronization, cost control and the like.
Disclosure of Invention
The utility model solves the problems of the prior art that various aspects such as state detection, fireproof isolation, charge-discharge synchronization and cost control still have larger improvement scope, and provides an energy storage battery container system.
The technical scheme adopted for solving the technical problems is as follows: an energy storage battery container system receives an external direct current power supply and an external alternating current power supply and comprises a direct current conversion unit, an alternating current-direct current conversion unit, a direct current bus, a plurality of power controllers, a plurality of battery packs and an inversion output unit which are positioned in a container body, wherein the input end of the direct current conversion unit is connected with the output end of the external direct current power supply, the input end of the alternating current-direct current conversion unit is connected with the output end of the external alternating current power supply, the output end of the direct current conversion unit and the output end of the alternating current-direct current conversion unit are connected with the inversion output unit through the direct current bus, and the battery packs are respectively connected with the direct current bus through corresponding power controllers; the container box in keep apart through the fire prevention division board, keep apart in the container box and have a plurality of battery fire prevention compartment, placed a set of group battery in every battery fire prevention compartment at least, still be equipped with air conditioner evaporimeter and circulating fan in every battery fire prevention compartment, air conditioner evaporimeter with air conditioner unit connect, air conditioner evaporimeter be located battery fire prevention compartment's top and aim at group battery, two circulating fans divide into preceding circulating fan and back circulating fan, preceding circulating fan and back circulating fan are located same vertical line, just preceding circulating fan installs in air conditioner evaporimeter's side, preceding circulating fan installs in the place ahead of group battery, forms the wind channel between preceding circulating fan and the back circulating fan, form the wind channel between air conditioner evaporimeter and the back circulating fan, back circulating fan is the circulating fan of side air inlet.
In the utility model, the direct current conversion unit, the alternating current-direct current conversion unit, the direct current bus, the plurality of power controllers, the plurality of battery packs and the inversion output unit can be adapted to the requirements of a general energy storage battery container system, wherein the direct current conversion unit can be used for connecting a solar battery system, a photovoltaic array and similar DC input power sources, the alternating current-direct current conversion unit can convert other alternating current energy systems such as a wind driven generator and the like, the battery packs can be connected in series by battery clusters, and the battery packs are connected with the direct current bus through the power controllers, so that one-time grid connection and charge-discharge synchronization can be realized; when the system is used for grid connection for the first time, under the condition that all battery packs have discharge, the high-power diode is used for managing the unidirectional discharge condition, and simultaneously, the batteries are discharged; closing a charging relay when the current difference value of each cluster is smaller than 10A; when the charging current exceeds a limiting threshold value, the charging relay is cut off (load cut off), and all contactors are kept in a closed working state after the battery is connected with the power grid for 1 time. In order to increase the fireproof performance of the utility model, the periphery of the battery box is matched with a circulating air channel formed by fireproof plates, so that a fan in the battery box forms a double independent circulating air channel, and the temperature control range is as follows: 35 ℃ + -15 ℃.
Preferably, the inversion output unit comprises a transformer, a plurality of energy storage converters and a battery system output control cabinet, wherein a plurality of same independent control units are configured in the battery system output control cabinet, each battery pack is connected with a corresponding power controller, a middle line, a total negative output line and a total positive output line of a battery pack connecting circuit are connected with a middle line, a total negative output line and a total positive output line corresponding to a direct current bus, the direct current bus is connected with the independent control units in the battery system output control cabinet, each independent control unit is connected with an independent energy storage converter, all the energy storage converters are connected with the transformer, and the transformer outputs the energy storage converters. In the utility model, each independent control unit is connected with an independent energy storage converter to realize independent control, and can be reasonably cut off in the fire prevention requirement.
Preferably, the transformer is a double-split-row transformer, and the double-split-row transformer is correspondingly connected with four energy storage converters which are connected in an average distribution manner, and all the energy storage converters are identical in model number.
Preferably, each energy storage converter is connected with a direct current bus through an independent control unit, each direct current bus is connected with a corresponding number of battery packs through a plurality of identical power controllers, and all the battery packs have identical structures.
Preferably, the power controller includes a battery pack connection circuit, a battery pack management control box BCMS, and a battery pack current sensor, wherein the battery pack current sensor detects a current on a connection line of the battery pack, an output end of the battery pack current sensor is connected with an input end of the battery pack management control box BCMS, a control end of the battery pack management control box BCMS controls a switching element in the battery pack connection circuit, and the battery pack is electrically connected with a corresponding direct current bus through the battery pack connection circuit.
Preferably, the battery pack connection circuit comprises a direct current breaker CZ-0, a diode D1, a diode D2, a diode D3, a diode D4, a breaker CZ-1, a fast fuse F, a contactor CZ-2, a contactor CZ-3, a contactor CZ-4 and a contactor CZ-5, wherein the cathode of the battery pack is connected with the fixed contact of the contactor CZ-5 and the anode of the diode D1 through one fast fuse F, the cathode of the diode D1 is connected with the movable contact of the contactor CZ-5, the cathode of the diode D2 and the fixed contact of the contactor CZ-4, the anode of the diode D2 is connected with the movable contact of the contactor CZ-4 and the first fixed contact of the direct current breaker CZ-0, and the first movable contact of the direct current breaker CZ-0 is connected with the total negative output line of the direct current bus;
the positive electrode of the battery pack is connected with the fixed contact of the contactor CZ-2 and the anode of the diode D4 through a quick fuse F, the cathode of the diode D4 is connected with the movable contact of the contactor CZ-2, the cathode of the diode D3 and the fixed contact of the contactor CZ-3, the anode of the diode D3 is connected with the movable contact of the contactor CZ-3 and the third fixed contact of the direct current breaker CZ-0, and the third movable contact of the direct current breaker CZ-0 is connected with the total positive outgoing line of the direct current bus;
the middle part of the battery pack is connected with the fixed contact of the contactor CZ-1 through a quick fuse F, the movable contact of the contactor CZ-1 is connected with the second fixed contact of the direct current breaker CZ-0, and the second fixed contact of the direct current breaker CZ-0 is connected with the middle line of the direct current bus.
Preferably, the dc breaker CZ-0 is a 3-wire dc breaker of the set current 630A, the diode D1, the diode D2, the diode D3, and the diode D4 are all anti-mutual-charging high-power charging diodes of the maximum working current 800A, the contactor CZ-2, the contactor CZ-3, the contactor CZ-4, and the contactor CZ-5 are contactors of the same model as the contactor which is contracted to the non-heating current 800A, and the fast fuses F are all fast fuses of the 15S current limit 650A.
Preferably, the independent control units comprise corresponding ESMUs, a circuit breaker and a quick fuse, the circuit breaker is controlled by the corresponding ESMUs, the direct current buses are connected with the energy storage converters after sequentially passing through the quick fuse and the circuit breaker, the input ends of the ESMUs receive shunt signals of the circuit breaker and feedback signals of the circuit breaker, the input ends of the ESMUs also receive emergency stop input signals, fire control input signals and emergency stop signals of the energy storage converters in the energy storage battery container system, the ESMUs are in communication connection with ESMUs of other control units in the output control cabinet of the energy storage battery container system through CAN buses, the ESMUs are also connected with battery management system control boxes S of corresponding battery packs through CAN buses, the ESMUs are respectively connected with the air conditioning units and the energy storage converters through RS485 buses, and the ESMUs are connected with an energy management system of power grid management through LAN ports. Further, the emergency stop input signal can be a manual input signal or a trigger signal after the current sensor exceeds a threshold value, the fire-fighting input signal in the utility model can be a fire-fighting device configured in a container, the fire-fighting device has a fire-fighting signal according to national standard requirements, the fire-fighting signal is the fire-fighting input signal, and the energy storage converter emergency stop signal is a control signal of the energy storage converter PCS.
Preferably, all the battery fireproof compartments are arranged in one independent battery compartment, the transformer in the variable output unit is arranged in one independent second high-voltage compartment, the energy storage converters and the battery system output control cabinet are arranged in another independent first high-voltage compartment, and the air conditioning unit in the energy storage battery container system is arranged in one independent control compartment. Furthermore, as a matching, a control cabin can be configured, and an air conditioning unit, a central control cabinet and a control power supply for supplying power to various controllers can be configured in the control cabin.
Preferably, the energy storage converters arranged in the high-voltage bin are respectively connected with the battery system output cabinet through a group of direct current buses, the battery system output cabinet is connected with the battery packs in the battery bin through four other groups of direct current buses, every two adjacent groups of battery packs are connected with the battery system output cabinet through a group of direct current buses, and each group of direct current buses are mutually independent.
The utility model has the following substantial effects: in the utility model, the direct current conversion unit, the alternating current-direct current conversion unit, the direct current bus, the plurality of power controllers, the plurality of battery packs and the inversion output unit can be adapted to the requirements of a general energy storage battery container system, wherein the direct current conversion unit can be used for connecting a solar battery system, a photovoltaic array and a similar DC input power supply, the alternating current-direct current conversion unit can convert aiming at a wind power generation system, the battery packs can be connected in series by battery clusters, and the battery packs are connected with the direct current bus through the power controllers, so that the synchronization of one-time grid connection and charge and discharge can be realized; when the system is used for grid connection for the first time, under the condition that all battery packs have discharge, the high-power diode is used for managing the unidirectional discharge condition, and simultaneously, the batteries are discharged; closing a charging relay when the current difference value of each cluster is smaller than 10A; when the charging current exceeds a limiting threshold value, the charging relay is cut off (load cut off), and all contactors are kept in a closed working state after the battery is connected with the power grid for 1 time. In order to increase the fireproof performance of the utility model, the periphery of the battery box is matched with a circulating air channel formed by fireproof plates, so that a fan in the battery box forms a double independent circulating air channel, and the temperature control range is as follows: 35 ℃ + -15 ℃.
Drawings
FIG. 1 is a schematic diagram of an overall circuit frame of the present utility model;
FIG. 2 is a schematic diagram of the overall structure of the present utility model;
FIG. 3 is a schematic diagram of a DC bus arrangement of the present utility model;
FIG. 4 is a schematic diagram of a portion of a circuit of the present utility model;
FIG. 5 is an enlarged schematic diagram of a portion of the circuit of the present utility model;
FIG. 6 is an enlarged schematic diagram of a portion of the circuit of the present utility model;
FIG. 7 is an enlarged schematic diagram of a portion of the circuit of the present utility model;
FIG. 8 is an enlarged schematic diagram of a portion of the circuit of the present utility model;
fig. 9 is a schematic view of a circulating air path of a battery pack according to the present utility model.
In the figure: a1, an inversion output unit, a2, a power controller, a3, a photovoltaic array, a4, a wind driven generator, a5, a direct current conversion unit, a6, an alternating current-direct current conversion unit, b1, a medium voltage bin, b2, a second high voltage bin, b3, a first high voltage bin, b4, a battery bin, b5, a control bin, b6, a medium voltage cabinet, b7, a battery system output control cabinet, b8, an energy storage converter, b9, a battery cluster, b10, an air conditioning unit, b11, a medium control cabinet, b12, a control power bin, b13, a direct current bus, c1, an air conditioning evaporator, c2 and a circulating fan.
Detailed Description
The technical scheme of the utility model is further specifically described by the following specific examples.
Example 1:
an energy storage battery container system receives an external direct current power supply and an external alternating current power supply and comprises a direct current conversion unit a5, an alternating current-direct current conversion unit a6, a direct current bus b13, a plurality of power controllers a2, a plurality of battery packs and an inversion output unit a1 which are positioned in a container body, wherein the input end of the direct current conversion unit is connected with the output end of the external direct current power supply, the input end of the alternating current-direct current conversion unit is connected with the output end of the external alternating current power supply, the output end of the direct current conversion unit and the output end of the alternating current-direct current conversion unit are connected with the inversion output unit through the direct current bus, and the battery packs are respectively connected with the direct current bus through corresponding power controllers; the container box in keep apart through the fire prevention division board, keep apart in the container box and have a plurality of battery fire prevention compartment, at least placed a set of group battery in every battery fire prevention compartment, still be equipped with air conditioning evaporator c1 and circulating fan c2 in every battery fire prevention compartment, air conditioning evaporator with air conditioning unit b10 be connected, air conditioning evaporator be located battery fire prevention compartment's top and aim at the group battery, two circulating fans divide into preceding circulating fan and back circulating fan, preceding circulating fan and back circulating fan are located same vertical line, just preceding circulating fan installs in air conditioning evaporator's side, preceding circulating fan installs in the place ahead of group battery, forms the wind channel between preceding circulating fan and the back circulating fan, form the wind channel between air conditioning evaporator and the back circulating fan, back circulating fan is the circulating fan of side air inlet. In this embodiment, the DC conversion unit, the ac-DC conversion unit, the DC bus, the plurality of power controllers, the plurality of battery packs and the inversion output unit can adapt to the needs of a general energy storage battery container system, where the DC conversion unit can be used to connect a solar battery system, a photovoltaic array a3 and a similar DC input power source, and the ac-DC conversion unit can convert other ac energy systems such as a wind generator a4, and the battery packs can be connected in series by a battery cluster b9, which is a feasible battery configuration scheme: operating voltage range: 45V-65.7V, maximum discharge current: 640A, output connector flow area: s480, outputting the flow guiding area of the copper bar: s200, digital display voltmeter precision: 0.01V, fan power of 40W, BMS-BMU, active equalization, equalization current of 200-1000mA and fire extinguishing mode of aerosol.
The battery pack is connected with the direct current bus through the power controller, so that one-time grid connection and charge and discharge synchronization can be realized; when the system is used for grid connection for the first time, under the condition that all battery packs have discharge, the high-power diode is used for managing the unidirectional discharge condition, and simultaneously, the batteries are discharged; closing a charging relay when the current difference value of each cluster is smaller than 10A; when the charging current exceeds a limiting threshold value, the charging relay is cut off (load cut off), and all contactors are kept in a closed working state after the battery is connected with the power grid for 1 time. In order to increase the fireproof performance of the utility model, the periphery of the battery box is matched with a circulating air channel formed by fireproof plates, so that a fan in the battery box forms a double independent circulating air channel, and the temperature control range is as follows: 35 ℃ + -15 ℃.
In this embodiment, all the battery fireproof compartments are configured in one independent battery compartment b4, the transformer in the variable output unit is configured in one independent second high voltage compartment b2, the plurality of energy storage converters b8 and the battery system output control cabinet b7 are configured in another independent first high voltage compartment b3, and the air conditioning unit in the energy storage battery container system is configured in one independent control compartment. Furthermore, as a match, a control cabin b5, an air conditioning unit, a central control cabinet b11 and a control power supply cabin b12 for supplying power to various controllers can be configured in the control cabin, and as a connection, a corresponding medium-voltage cabin b1 and a medium-voltage cabinet b6 can be configured in the medium-voltage cabin. The inversion output unit comprises a transformer, a plurality of energy storage converters and a battery system output control cabinet, wherein a plurality of same independent control units are arranged in the battery system output control cabinet, each battery pack is connected with a corresponding power controller, a middle line, a total negative output line and a total positive output line of a battery pack connecting circuit are connected with a middle line, a total negative output line and a total positive output line corresponding to a direct current bus, the direct current bus is connected with the independent control units in the battery system output control cabinet, each independent control unit is connected with one independent energy storage converter, all the energy storage converters are connected with the transformer, and the transformer outputs the energy storage converters. In the utility model, each independent control unit is connected with an independent energy storage converter to realize independent control, and can be reasonably cut off in the fire prevention requirement. The embodiment has no flow control and overcurrent protection function.
In this embodiment, the transformer is a double-split-column transformer, and the double-split-column transformer is correspondingly connected with four energy storage converters which are connected in an evenly distributed manner, and all the energy storage converters have the same model. Each energy storage converter is connected with a direct current bus through an independent control unit, each direct current bus is connected with a corresponding number of battery packs through a plurality of identical power controllers, and all battery packs are identical in structure. The power controller comprises a battery pack connecting circuit, a battery pack management control box BCMS and a battery pack current sensor, wherein the battery pack current sensor detects current on a connecting line of a battery pack, the output end of the battery pack current sensor is connected with the input end of the battery pack management control box BCMS, the control end of the battery pack management control box BCMS controls a switching element in the battery pack connecting circuit, and the battery pack is electrically connected with a corresponding direct current bus through the battery pack connecting circuit.
In this embodiment, the battery pack connection circuit includes a dc breaker CZ-0, a diode D1, a diode D2, a diode D3, a diode D4, a breaker CZ-1, a fast fuse F, a contactor CZ-2, a contactor CZ-3, a contactor CZ-4, and a contactor CZ-5, wherein the negative electrode of the battery pack is connected with the stationary contact of the contactor CZ-5 and the anode of the diode D1 through one fast fuse F, the cathode of the diode D1 is connected with the movable contact of the contactor CZ-5, the cathode of the diode D2 and the stationary contact of the contactor CZ-4, the anode of the diode D2 is connected with the movable contact of the contactor CZ-4 and the first stationary contact of the dc breaker CZ-0, and the first movable contact of the dc breaker CZ-0 is connected with the total negative output line of the dc bus bar;
the positive electrode of the battery pack is connected with the fixed contact of the contactor CZ-2 and the anode of the diode D4 through a quick fuse F, the cathode of the diode D4 is connected with the movable contact of the contactor CZ-2, the cathode of the diode D3 and the fixed contact of the contactor CZ-3, the anode of the diode D3 is connected with the movable contact of the contactor CZ-3 and the third fixed contact of the direct current breaker CZ-0, and the third movable contact of the direct current breaker CZ-0 is connected with the total positive outgoing line of the direct current bus;
the middle part of the battery pack is connected with the fixed contact of the contactor CZ-1 through a quick fuse F, the movable contact of the contactor CZ-1 is connected with the second fixed contact of the direct current breaker CZ-0, and the second fixed contact of the direct current breaker CZ-0 is connected with the middle line of the direct current bus. The direct current breaker CZ-0 is a 3-wire direct current breaker of a set current 630A, the diode D1, the diode D2, the diode D3 and the diode D4 are all anti-mutual-charging high-power charging diodes of a maximum working current 800A, the contactor CZ-2, the contactor CZ-3, the contactor CZ-4 and the contactor CZ-5 are contactors of the same model of a contracted non-heating current 800A, and the fast fuses F are fast fuses of 15S current limiting 650A. The empty circuit breaker CZ-1 and the fast fuse F can realize one-time grid connection and charge and discharge synchronization; when the system is used for grid connection for the first time, under the condition that all battery packs have discharge, a high-power diode is used for managing one-way discharge conditions, and discharge is performed at the same time; closing a charging relay when the current difference value of each cluster is smaller than 10A; when the charging current exceeds a defined threshold, the charging relay is turned off (load cut-off); after the battery system is connected with the power grid for 1 time, all contactors are kept in a closed working state.
The intelligent energy storage system is characterized in that the independent control units comprise corresponding ESMUs, circuit breakers and quick fuses, the circuit breakers are controlled by the corresponding ESMUs, the direct current buses are connected with the energy storage converters after sequentially passing through the quick fuses and the circuit breakers, the input ends of the ESMUs receive shunt signals of the circuit breakers and feedback signals of the circuit breakers, the input ends of the ESMUs also receive emergency stop input signals, fire control input signals and emergency stop signals of the energy storage converters in an energy storage battery container system, the ESMUs are in communication connection with ESMUs of other control units in an output control cabinet of the energy storage battery container system through CAN buses, the ESMUs are also connected with battery pack management system control boxes BCMS of corresponding battery packs through CAN buses, the ESMUs are respectively connected with an air conditioning unit and the energy storage converters through RS485 buses, and the ESMUs are connected with an energy management system of power grid management through LAN ports. Further, the emergency stop input signal can be a manual input signal or a trigger signal after the current sensor exceeds a threshold value, the fire-fighting input signal in the utility model can be a fire-fighting device configured in a container, the fire-fighting device has a fire-fighting signal according to national standard requirements, the fire-fighting signal is the fire-fighting input signal, and the energy storage converter emergency stop signal is a control signal of the energy storage converter PCS.
In this embodiment, the energy storage converters configured in the high-voltage bin are respectively connected with the battery system output cabinet through a group of direct current buses, the battery system output cabinet is connected with the battery packs in the battery bin through another four groups of direct current buses, every two adjacent groups of battery packs are connected with the battery system output cabinet through a group of direct current buses, and every two groups of direct current buses are mutually independent.
The above-described embodiment is only a preferred embodiment of the present utility model, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (10)
1. The energy storage battery container system is characterized by receiving an external direct current power supply and an external alternating current power supply, and comprises a direct current conversion unit, an alternating current-direct current conversion unit, a direct current bus, a plurality of power controllers, a plurality of battery packs and an inversion output unit which are positioned in a container body, wherein the input end of the direct current conversion unit is connected with the output end of the external direct current power supply, the input end of the alternating current-direct current conversion unit is connected with the output end of the external alternating current power supply, the output end of the direct current conversion unit and the output end of the alternating current-direct current conversion unit are connected with the inversion output unit through the direct current bus, and the battery packs are respectively connected with the direct current bus through the corresponding power controllers; the container box in keep apart through the fire prevention division board, keep apart in the container box and have a plurality of battery fire prevention compartment, placed a set of group battery at least in every battery fire prevention compartment, still be equipped with air conditioner evaporimeter and circulating fan in every battery fire prevention compartment, air conditioner evaporimeter be connected with air conditioner unit, air conditioner evaporimeter is located the top of battery fire prevention compartment and aim at the group battery, two circulating fans divide into preceding circulating fan and back circulating fan, preceding circulating fan and back circulating fan are located same vertical line, just preceding circulating fan installs in air conditioner evaporimeter's side, preceding circulating fan installs in the place ahead of group battery, forms the wind channel between preceding circulating fan and the back circulating fan, form the wind channel between air conditioner evaporimeter and the back circulating fan, back circulating fan is the circulating fan of side air inlet.
2. The energy storage battery container system according to claim 1, wherein the inversion output unit comprises a transformer, a plurality of energy storage converters and a battery system output control cabinet, a plurality of same independent control units are configured in the battery system output control cabinet, each group of battery packs is connected with a corresponding power controller, an intermediate line, a total negative output line and a total positive output line of a battery pack connecting circuit are connected with an intermediate line, a total negative output line and a total positive output line corresponding to a direct current bus, the direct current bus is connected with the independent control units in the battery system output control cabinet, each independent control unit is connected with an independent energy storage converter, all the energy storage converters are connected with the transformer, and the output is performed by the transformer.
3. The energy storage battery container system according to claim 2, wherein the transformer is a double-split-row transformer, and the double-split-row transformer is correspondingly connected with four energy storage converters which are connected in an evenly distributed manner, and all the energy storage converters are identical in model number.
4. A container system according to claim 3, wherein each energy storage converter is connected to a dc bus through an independent control unit, each dc bus is connected to a corresponding number of battery packs through a plurality of identical power controllers, and all battery packs have the same structure.
5. The energy storage battery container system of claim 4, wherein the power controller comprises a battery pack connection circuit, a battery pack management control box BCMS, and a battery pack current sensor, the battery pack current sensor detecting a current on a connection line of the battery pack, an output of the battery pack current sensor being connected with an input of the battery pack management control box BCMS, a control end of the battery pack management control box BCMS controlling a switching element in the battery pack connection circuit, the battery pack being electrically connected with a corresponding dc bus via the battery pack connection circuit.
6. The energy storage battery container system of claim 5, wherein the battery pack connection circuit comprises a direct current breaker CZ-0, a diode D1, a diode D2, a diode D3, a diode D4, a breaker CZ-1, a fast fuse F, a contactor CZ-2, a contactor CZ-3, a contactor CZ-4 and a contactor CZ-5, wherein the negative electrode of the battery pack is connected with the stationary contact of the contactor CZ-5 and the anode of the diode D1 through one fast fuse F, the cathode of the diode D1 is connected with the movable contact of the contactor CZ-5, the cathode of the diode D2 and the stationary contact of the contactor CZ-4, the anode of the diode D2 is connected with the movable contact of the contactor CZ-4 and the first stationary contact of the direct current breaker CZ-0, and the first movable contact of the direct current breaker CZ-0 is connected with the total negative output line of the direct current bus bar;
the positive electrode of the battery pack is connected with the fixed contact of the contactor CZ-2 and the anode of the diode D4 through a quick fuse F, the cathode of the diode D4 is connected with the movable contact of the contactor CZ-2, the cathode of the diode D3 and the fixed contact of the contactor CZ-3, the anode of the diode D3 is connected with the movable contact of the contactor CZ-3 and the third fixed contact of the direct current breaker CZ-0, and the third movable contact of the direct current breaker CZ-0 is connected with the total positive outgoing line of the direct current bus;
the middle part of the battery pack is connected with the fixed contact of the contactor CZ-1 through a quick fuse F, the movable contact of the contactor CZ-1 is connected with the second fixed contact of the direct current breaker CZ-0, and the second fixed contact of the direct current breaker CZ-0 is connected with the middle line of the direct current bus.
7. The energy storage battery container system of claim 6, wherein the dc breaker CZ-0 is a 3-wire dc breaker for setting the current 630A, the diode D1, the diode D2, the diode D3, the diode D4 are all anti-mutual-charging high-power charging diodes for maximum working current 800A, the contactor CZ-2, the contactor CZ-3, the contactor CZ-4, and the contactor CZ-5 are all of the same type of contactor for specifying no heating current 800A, and the fast fuse F is a fast fuse for 15S current limiting 650A.
8. The energy storage battery container system according to claim 7, wherein the independent control units comprise corresponding ESMUs, circuit breakers and fast fuses, the circuit breakers are controlled by the corresponding ESMUs, the direct current buses sequentially pass through the fast fuses and the circuit breakers and then are connected with the energy storage converters, the input ends of the ESMUs receive shunt signals of the circuit breakers and feedback signals of the circuit breakers, the input ends of the ESMUs also receive emergency stop input signals, fire control input signals and emergency stop signals of the energy storage converters in the energy storage battery container system, the ESMUs are in communication connection with ESMUs of other control units in an output control cabinet of the energy storage battery container system through CAN buses, the ESMUs are also connected with battery pack management system control boxes BCMS of corresponding battery packs through CAN buses, the ESMUs are respectively connected with air conditioning units and the energy storage converters through RS485 buses, and the ESMUs are connected with an energy management system EMS of power grid management through LAN ports.
9. The energy storage battery container system of claim 8, wherein all battery fire compartments are disposed in a single battery compartment, the transformer in the variable output unit is disposed in a single second high voltage compartment, the plurality of energy storage converters and the battery system output control cabinet are disposed in another single first high voltage compartment, and the air conditioning unit in the energy storage battery container system is disposed in a single control compartment.
10. The energy storage battery container system according to claim 9, wherein the energy storage converters arranged in the high-voltage bin are respectively connected with the battery system output cabinet through a group of direct current buses, the battery system output cabinet is connected with the battery packs in the battery bin through four other groups of direct current buses, every two adjacent groups of battery packs are connected with the battery system output cabinet through a group of direct current buses, and each group of direct current buses are mutually independent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220931206.6U CN218958607U (en) | 2022-04-21 | 2022-04-21 | Energy storage battery container system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220931206.6U CN218958607U (en) | 2022-04-21 | 2022-04-21 | Energy storage battery container system |
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| CN218958607U true CN218958607U (en) | 2023-05-02 |
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| CN202220931206.6U Active CN218958607U (en) | 2022-04-21 | 2022-04-21 | Energy storage battery container system |
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