Energy storage battery container system

Abstract

The present invention relates to an energy storage battery container system. The technical solution of the present invention mainly comprises a DC conversion unit, an AC / DC conversion unit, a DC bus, a plurality of power controllers, a plurality of battery packs and an inverter output unit located in a container body. The input end of the DC conversion unit is connected to the output end of an external DC power supply, the input end of the AC / DC conversion unit is connected to the output end of an external AC power supply, the output end of the DC conversion unit and the output end of the AC / DC conversion unit are both connected to the inverter output unit through a DC bus, and the battery packs are respectively connected to the DC bus through corresponding power controllers.

Description

Technical Field

[0001] The invention belongs to an energy storage control system and relates to an energy storage battery container system. Background Art

[0002] Energy storage container is a common energy storage application system at present. For example, CN201510554037.3 discloses an electrical structure for energy storage battery container, which includes: battery assembly; auxiliary equipment; junction box, the battery assembly is connected to the junction box, the junction box is connected to the external PCS, and then connected to the AC power grid through the isolation transformer of the PCS; the junction box is also connected to the auxiliary equipment; external background monitoring, which is respectively connected to the junction box and the PCS. Its advantages are: it effectively extends the battery life through the battery management system and improves the safety factor of the entire energy storage battery container. PCS is the energy storage converter, which can control the charging and discharging process of the battery, perform AC and DC conversion, and can directly supply power to the AC load without a power grid. PCS is composed of a DC / AC bidirectional converter, a control unit, etc. The PCS controller receives the background control instruction through communication, controls the converter to charge or discharge the battery according to the sign and size of the power instruction, and realizes the regulation of the active power and reactive power of the power grid. The PCS controller communicates with the BMS through the CAN interface to obtain battery pack status information, which can realize protective charging and discharging of the battery to ensure safe battery operation.

[0003] For another example, CN202022650273.4 discloses a standard ship container battery system that can be quickly replaced, including: a box, a battery module, a ventilation module, a fire module, a battery management module, a control module, and a magnetic cable plug; the side wall of the box is provided with at least one ventilation window, and the bottom of the box is provided with a cover plate hole for accommodating the cable collection socket on the ship; the battery module includes multiple groups of battery cells; the ventilation module includes multiple ventilation devices; the battery management module connects the battery module; the control module is used to obtain the working data of the ventilation module, the fire module and the battery management module, and control the working status of the ventilation module, the fire module and the battery module, and the control module includes a data output terminal, which is used to output working data; the magnetic cable plug is connected to different jacks on the cable collection socket. However, the prior art still has a lot of room for improvement in terms of state detection, fire isolation, charging and discharging synchronization, cost control and other aspects. Summary of the invention

[0004] The present invention solves the problems in the prior art, but there is still much room for improvement in various aspects such as state detection, fire isolation, charging and discharging synchronization, and cost control in the prior art, and provides an energy storage battery container system.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an energy storage battery container system receives an external DC power supply and an external AC power supply, including a DC conversion unit, an AC / DC conversion unit, a DC bus, a plurality of power controllers, a plurality of battery packs and an inverter output unit located in the container body, the input end of the DC conversion unit is connected to the output end of the external DC power supply, the input end of the AC / DC conversion unit is connected to the output end of the external AC power supply, the output end of the DC conversion unit and the output end of the AC / DC conversion unit are both connected to the inverter output unit through the DC bus, and the battery packs are respectively connected to the DC bus through corresponding power controllers; the container body is provided with a fireproof isolation board for Isolation, a number of battery fireproof compartments are isolated in the container body, at least one battery pack is placed in each battery fireproof compartment, and each battery fireproof compartment is also equipped with an air-conditioning evaporator and a circulation fan, the air-conditioning evaporator is connected to the air-conditioning unit, the air-conditioning evaporator is located at the top of the battery fireproof compartment and is aligned with the battery pack, two circulation fans are divided into a front circulation fan and a rear circulation fan, the front circulation fan and the rear circulation fan are located on the same vertical line, and the front circulation fan is installed on the side of the air-conditioning evaporator, the front circulation fan is installed in front of the battery pack, an air duct is formed between the front circulation fan and the rear circulation fan, and an air duct is formed between the air-conditioning evaporator and the rear circulation fan, and the rear circulation fan is a circulation fan with side air intake.

[0006] In the present invention, the DC conversion unit, the AC / DC conversion unit, the DC bus, several power controllers, several battery packs and the inverter output unit can meet the needs of the general energy storage battery container system, wherein the DC conversion unit can be used to connect the solar cell system and the photovoltaic array, and similar DC input power supplies, while the AC / DC conversion unit can be used for other AC energy systems such as wind turbines. The battery pack can be connected in series by battery clusters, and the battery pack is connected to the DC bus through the power controller, which can achieve one-time grid connection and synchronous charging and discharging; wherein, when the first grid connection is used, when all battery packs have discharge conditions, the high-power diode is used to manage the unidirectional discharge conditions and discharge at the same time; when the current difference of each cluster is less than 10A, the charging relay is closed; when the charging current exceeds the limited threshold, the charging relay is cut off (load cut-off), and after the battery is grid-connected once in the present invention, all contactors remain in a closed working state. In order to increase the fireproof performance of the present invention, the surrounding fireproof board is used to form a circulating air duct, so that the fan in the battery box forms a double independent circulating air duct, and the temperature control range is: 35℃±15℃.

[0007] Preferably, the inverter output unit includes a transformer, several energy storage converters, and a battery system output control cabinet. The battery system output control cabinet is equipped with several identical independent control units. Each battery pack is connected to a corresponding power controller. The middle line, total negative output line, and total positive output line of the battery pack connection circuit are connected to the middle line, total negative output line, and total positive output line corresponding to the DC bus. The DC bus is connected to the independent control unit in the battery system output control cabinet. Each independent control unit is connected to an independent energy storage converter. All energy storage converters are connected to the transformer, and the transformer performs output. In the present invention, each independent control unit is connected to an independent energy storage converter to achieve independent control, and can be reasonably cut off in fire protection requirements.

[0008] Preferably, the transformer is a double-column transformer, and the double-column transformer is correspondingly connected to four evenly distributed energy storage converters, and all the energy storage converters are of the same model.

[0009] Preferably, each energy storage inverter is connected to a DC bus via an independent control unit, and each DC bus is connected to a corresponding number of battery packs via a number of identical power controllers, and all battery packs have the same structure.

[0010] Preferably, the power controller includes a battery pack connection circuit, a battery pack management control box BCMS and a battery pack current sensor. The battery pack current sensor detects the current on the connection line of the battery pack. The output end of the battery pack current sensor is connected to the input end of the battery pack management control box BCMS. The control end of the battery pack management control box BCMS controls the switching elements in the battery pack connection circuit. The battery pack is electrically connected to the corresponding DC bus through the battery pack connection circuit.

[0011] Preferably, the battery pack connection circuit includes a DC circuit breaker CZ-0, a diode D1, a diode D2, a diode D3, a diode D4, a circuit breaker CZ-1, a fast fuse F, a contactor CZ-2, a contactor CZ-3, a contactor CZ-4 and a contactor CZ-5. The negative electrode of the battery pack is connected to the static contact of the contactor CZ-5 and the anode of the diode D1 through a fast fuse F. The cathode of the diode D1 is connected to the moving contact of the contactor CZ-5, the cathode of the diode D2 and the static contact of the contactor CZ-4. The anode of the diode D2 is connected to the moving contact of the contactor CZ-4 and the first static contact of the DC circuit breaker CZ-0. The first moving contact of the DC circuit breaker CZ-0 is connected to the total negative output line of the DC bus.

[0012] The positive electrode of the battery pack is connected to the static contact of the contactor CZ-2 and the anode of the diode D4 through a fast fuse F, the cathode of the diode D4 is connected to the moving contact of the contactor CZ-2, the cathode of the diode D3 and the static contact of the contactor CZ-3, the anode of the diode D3 is connected to the moving contact of the contactor CZ-3 and the third static contact of the DC circuit breaker CZ-0, and the third moving contact of the DC circuit breaker CZ-0 is connected to the total positive output line of the DC bus;

[0013] The middle of the battery pack is connected to the static contact of the contactor CZ-1 through a fast fuse F, the moving contact of the contactor CZ-1 is connected to the second static contact of the DC circuit breaker CZ-0, and the second static contact of the DC circuit breaker CZ-0 is connected to the middle line of the DC bus.

[0014] Preferably, the DC circuit breaker CZ-0 is a 3-wire DC circuit breaker with a set current of 630A, the diode D1, the diode D2, the diode D3, and the diode D4 are all anti-mutual charging high-power diodes with a maximum working current of 800A, the contactor CZ-2, the contactor CZ-3, the contactor CZ-4, and the contactor CZ-5 are contactors of the same model with an agreed non-heating current of 800A, and the fast fuses F are all 15S fast fuses with a current limiting of 650A.

[0015] Preferably, the independent control unit includes a corresponding ESMU, a circuit breaker and a fast fuse, the circuit breaker is controlled by the corresponding ESMU, the DC bus is connected to the energy storage inverter through the fast fuse and the circuit breaker in turn, the input end of the ESMU receives the shunt signal of the circuit breaker and the feedback signal of the circuit breaker, the input end of the ESMU also receives the emergency stop input signal, the fire input signal and the energy storage inverter emergency stop signal in the energy storage battery container system, the ESMU is connected to the ESMU of other control units in the output control cabinet of the energy storage battery container system through the CAN bus, the ESMU is also connected to the battery management system control box BCMS of the corresponding battery pack through the CAN bus, the ESMU is respectively connected to the air-conditioning unit and the energy storage inverter through the RS485 bus, and the ESMU is connected to the energy management system EMS of the power grid management through the LAN port. Furthermore, the emergency stop input signal can be a manual input signal or a trigger signal after the current sensor exceeds the threshold value. The fire input signal in the present invention can be a fire-fighting device configured in the container. The fire-fighting device here has a fire signal according to national standards. This signal is the fire input signal. The energy storage inverter emergency stop signal is a control signal provided in the energy storage inverter PCS.

[0016] Preferably, all battery fireproof compartments are arranged in an independent battery compartment, the transformer in the output unit is arranged in an independent second high-voltage compartment, the several 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 an independent control compartment. Furthermore, as a supporting device, a control compartment can also be arranged, and the air-conditioning unit, the central control cabinet, and the control power supply for various controllers can be arranged in the control compartment.

[0017] Preferably, the energy storage inverters arranged in the high-voltage compartment are connected to the battery system output cabinet through a group of DC busbars respectively, and the battery system output cabinet is connected to the battery packs in the battery compartment through another four groups of DC busbars. Every two adjacent groups of battery packs are connected to the battery system output cabinet through a group of DC busbars, and each group of DC busbars is independent of each other.

[0018] The substantial effect of the present invention is: in the present invention, the DC conversion unit, the AC / DC conversion unit, the DC bus, several power controllers, several battery packs and the inverter output unit can meet the needs of the general energy storage battery container system, wherein the DC conversion unit can be used to connect the solar cell system and the photovoltaic array, and similar DC input power supplies, while the AC / DC conversion unit can be used for wind power generation systems. The battery pack can be connected in series by battery clusters, and the battery pack is connected to the DC bus through the power controller, which can achieve one-time grid connection and synchronous charging and discharging; wherein, when the first grid connection is used, when all battery packs have discharge conditions, the high-power diode is used to manage the unidirectional discharge conditions and discharge at the same time; when the current difference of each cluster is less than 10A, the charging relay is closed; when the charging current exceeds the limited threshold, the charging relay is cut off (load cut-off), and after the battery is grid-connected once in the present invention, all contactors remain in a closed working state. In order to increase the fireproof performance of the present invention, the surrounding fireproof board is used to form a circulating air duct, so that the fan in the battery box forms a double independent circulating air duct, and the temperature control range is: 35℃±15℃. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an overall circuit framework of the present invention;

[0020] Figure 2 It is a schematic diagram of an overall structure of the present invention;

[0021] Figure 3 A schematic diagram of a DC bus arrangement of the present invention;

[0022] Figure 4 A partial circuit diagram of the present invention;

[0023] Figure 5is an enlarged schematic diagram of a partial circuit of the present invention;

[0024] Figure 6 is an enlarged schematic diagram of a partial circuit of the present invention;

[0025] Figure 7 is an enlarged schematic diagram of a partial circuit of the present invention;

[0026] Figure 8 is an enlarged schematic diagram of a partial circuit of the present invention;

[0027] Fig. 9 This is a schematic diagram of a battery pack circulation air path of the present invention.

[0028] In the figure: a1, inverter output unit, a2, power controller, a3, photovoltaic array, a4, wind turbine, a5, DC conversion unit, a6, AC / DC conversion unit, b1, medium voltage compartment, b2, second high voltage compartment, b3, first high voltage compartment, b4, battery compartment, b5, control compartment, b6, medium voltage cabinet, b7, battery system output control cabinet, b8, energy storage converter, b9, battery cluster, b10, air conditioning unit, b11, central control cabinet, b12, control power compartment, b13, DC bus, c1, air conditioning evaporator, c2, circulation fan. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below through specific embodiments.

[0030] Embodiment 1:

[0031] A storage battery container system receives an external DC power supply and an external AC power supply, including a DC conversion unit a5, an AC / DC conversion unit a6, a DC bus b13, a plurality of power controllers a2, a plurality of battery packs and an inverter output unit a1 located in a container body, wherein the input end of the DC conversion unit is connected to the output end of the external DC power supply, the input end of the AC / DC conversion unit is connected to the output end of the external AC power supply, the output end of the DC conversion unit and the output end of the AC / DC conversion unit are both connected to the inverter output unit through a DC bus, and the battery packs are respectively connected to the DC bus through corresponding power controllers; the container body is isolated by a fireproof isolation board, and the container body There are several battery fireproof compartments in the internal isolation, at least one battery pack is placed in each battery fireproof compartment, and each battery fireproof compartment is also equipped with an air-conditioning evaporator c1 and a circulation fan c2, the air-conditioning evaporator is connected to the air-conditioning unit b10, the air-conditioning evaporator is located at the top of the battery fireproof compartment and is aligned with the battery pack, two circulation fans are divided into a front circulation fan and a rear circulation fan, the front circulation fan and the rear circulation fan are located on the same vertical line, and the front circulation fan is installed on the side of the air-conditioning evaporator, the front circulation fan is installed in front of the battery pack, an air duct is formed between the front circulation fan and the rear circulation fan, and an air duct is formed between the air-conditioning evaporator and the rear circulation fan, and the rear circulation fan is a circulation fan with side air intake. In this embodiment, the DC conversion unit, the AC / DC conversion unit, the DC bus, several power controllers, several battery packs and the inverter output unit can meet the needs of the general energy storage battery container system, wherein the DC conversion unit can be used to connect the solar cell system and the photovoltaic array a3, and similar DC input power supplies, while the AC / DC conversion unit can be used for conversion for other AC energy systems such as the wind turbine a4. The battery pack can be a battery cluster b9 connected in series. A feasible battery configuration scheme: operating voltage range: 45V-65.7V, maximum discharge current: 640A, output connector diversion area: S480, output copper bus diversion area: S200, digital display voltmeter accuracy: 0.01V, fan power: 40W, BMS-BMU: active balancing, balancing current 200-1000mA, fire extinguishing method: aerosol.

[0032] The battery pack is connected to the DC bus through a power controller, which can achieve one-time grid connection and synchronous charging and discharging; when it is used for the first time when connected to the grid, when all battery packs are under discharge conditions, high-power diodes are used to manage unidirectional discharge conditions and discharge simultaneously; when the current difference of each cluster is less than 10A, the charging relay is closed; when the charging current exceeds the specified threshold, the charging relay is cut off (load cut-off). After the battery is connected to the grid once in the present invention, all contactors remain in a closed working state. In order to increase the fireproof performance of the present invention, the surrounding fireproof panels form a circulating air duct, so that the fan in the battery box forms a double independent circulating air duct, and the temperature control range is: 35℃±15℃.

[0033] In this embodiment, all battery fireproof compartments are arranged in an independent battery compartment b4, the transformer in the output unit is arranged in an independent second high-voltage compartment b2, the several energy storage converters b8 and the battery system output control cabinet b7 are arranged in another independent first high-voltage compartment b3, and the air-conditioning unit in the energy storage battery container system is arranged in an independent control compartment. Furthermore, as a supporting device, a control compartment b5 can also be arranged, and the air-conditioning unit, the central control cabinet b11 and the control power supply compartment b12 for powering various controllers can all be arranged in the control compartment. As a connection, a corresponding medium-voltage compartment b1 can also be arranged, and a medium-voltage cabinet b6 can be arranged in the medium-voltage compartment. The inverter output unit includes a transformer, several energy storage converters, and a battery system output control cabinet. The battery system output control cabinet is equipped with several identical independent control units. Each battery pack is connected to a corresponding power controller. The middle line, total negative output line, and total positive output line of the battery pack connection circuit are connected to the middle line, total negative output line, and total positive output line corresponding to the DC bus. The DC bus is connected to the independent control unit in the battery system output control cabinet. Each independent control unit is connected to an independent energy storage converter. All energy storage converters are connected to the transformer, and the transformer performs output. In the present invention, each independent control unit is connected to an independent energy storage converter to achieve independent control, and reasonable cutoff can be performed in fire protection requirements. This embodiment has no flow control and has an overcurrent protection function.

[0034] In this embodiment, the transformer is a double-column transformer, and the double-column transformer is correspondingly connected to four evenly distributed energy storage inverters, and all energy storage inverters are of the same model. Each energy storage inverter is connected to a DC bus through an independent control unit, and each DC bus is connected to a corresponding number of battery packs through several identical power controllers, and all battery pack structures are the same. The power controller includes a battery pack connection circuit, a battery pack management control box BCMS, and a battery pack current sensor. The battery pack current sensor detects the current on the connection line of the battery pack, and the output end of the battery pack current sensor is connected to the input end of the battery pack management control box BCMS. The control end of the battery pack management control box BCMS controls the switch element in the battery pack connection circuit, and the battery pack is electrically connected to the corresponding DC bus through the battery pack connection circuit.

[0035] In this embodiment, the battery pack connection circuit includes a DC circuit breaker CZ-0, a diode D1, a diode D2, a diode D3, a diode D4, a circuit breaker CZ-1, a fast fuse F, a contactor CZ-2, a contactor CZ-3, a contactor CZ-4 and a contactor CZ-5. The negative electrode of the battery pack is connected to the static contact of the contactor CZ-5 and the anode of the diode D1 through a fast fuse F. The cathode of the diode D1 is connected to the moving contact of the contactor CZ-5, the cathode of the diode D2 and the static contact of the contactor CZ-4. The anode of the diode D2 is connected to the moving contact of the contactor CZ-4 and the first static contact of the DC circuit breaker CZ-0. The first moving contact of the DC circuit breaker CZ-0 is connected to the total negative output line of the DC bus.

[0036] The positive electrode of the battery pack is connected to the static contact of the contactor CZ-2 and the anode of the diode D4 through a fast fuse F, the cathode of the diode D4 is connected to the moving contact of the contactor CZ-2, the cathode of the diode D3 and the static contact of the contactor CZ-3, the anode of the diode D3 is connected to the moving contact of the contactor CZ-3 and the third static contact of the DC circuit breaker CZ-0, and the third moving contact of the DC circuit breaker CZ-0 is connected to the total positive output line of the DC bus;

[0037] The middle of the battery pack is connected to the static contact of contactor CZ-1 through a fast fuse F, the moving contact of contactor CZ-1 is connected to the second static contact of DC circuit breaker CZ-0, and the second static contact of DC circuit breaker CZ-0 is connected to the middle line of the DC bus. The DC circuit breaker CZ-0 is a 3-wire DC circuit breaker with a set current of 630A, the diode D1, the diode D2, the diode D3, and the diode D4 are all anti-mutual charging high-power diodes with a maximum working current of 800A, contactors CZ-2, contactors CZ-3, contactors CZ-4 and contactors CZ-5 are contactors of the same model with an agreed non-heating current of 800A, and the fast fuses F are all 15S fast fuses with a current limit of 650A. The air-conditioning circuit breaker CZ-1 and fast fuse F can realize one-time grid connection and synchronous charging and discharging. When it is connected to the grid for the first time, when all battery groups are in the discharge condition, high-power diodes are used to achieve unidirectional discharge conditions and discharge simultaneously. When the current difference of each cluster is less than 10A, the charging relay is closed; when the charging current exceeds the limit threshold, the charging relay is cut off (load cut-off). After the battery system is connected to the grid once, all contactors remain in a closed working state.

[0038] The independent control unit includes a corresponding ESMU, a circuit breaker and a fast fuse. The circuit breaker is controlled by the corresponding ESMU. The DC bus is connected to the energy storage inverter through the fast fuse and the circuit breaker in turn. The input end of the ESMU receives the shunt signal of the circuit breaker and the feedback signal of the circuit breaker. The input end of the ESMU also receives the emergency stop input signal, the fire input signal and the energy storage inverter emergency stop signal in the energy storage battery container system. The ESMU is connected to the ESMU of other control units in the output control cabinet of the energy storage battery container system through the CAN bus. The ESMU is also connected to the battery management system control box BCMS of the corresponding battery pack through the CAN bus. The ESMU is respectively connected to the air-conditioning unit and the energy storage inverter through the RS485 bus. The ESMU is connected to the energy management system EMS of the power grid management through the LAN port. Furthermore, the emergency stop input signal can be a manual input signal or a trigger signal after the current sensor exceeds the threshold value. The fire input signal in the present invention can be a fire-fighting device configured in the container. The fire-fighting device here has a fire signal according to national standards. This signal is the fire input signal. The energy storage inverter emergency stop signal is a control signal provided in the energy storage inverter PCS.

[0039] In this embodiment, the energy storage inverters configured in the high-voltage compartment are connected to the battery system output cabinet through a group of DC busbars, and the battery system output cabinet is connected to the battery pack in the battery compartment through another four groups of DC busbars. Every two adjacent groups of battery packs are connected to the battery system output cabinet through a group of DC busbars, and each group of DC busbars is independent of each other.

[0040] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. An energy storage battery container system, characterized in that: The container receives an external DC power supply and an external AC power supply, including a DC conversion unit, an AC / DC conversion unit, a DC bus, a plurality of power controllers, a plurality of battery packs and an inverter output unit located in the container body, wherein the input end of the DC conversion unit is connected to the output end of the external DC power supply, the input end of the AC / DC conversion unit is connected to the output end of the external AC power supply, the output end of the DC conversion unit and the output end of the AC / DC conversion unit are both connected to the inverter output unit through the DC bus, and the battery packs are respectively connected to the DC bus through corresponding power controllers; the container body is isolated by a fireproof isolation board, and a plurality of battery fireproof compartments are isolated in the container body, and each battery pack is connected to the DC bus through the corresponding power controllers; At least one battery pack is placed in the fireproof compartment of the pool, and each battery fireproof compartment is also equipped with an air-conditioning evaporator and a circulation fan, the air-conditioning evaporator is connected to the air-conditioning unit, the air-conditioning evaporator is located at the top of the battery fireproof compartment and is aligned with the battery pack, and the two circulation fans are divided into a front circulation fan and a rear circulation fan, the front circulation fan and the rear circulation fan are located on the same vertical line, and the front circulation fan is installed on the side of the air-conditioning evaporator, the front circulation fan is installed in front of the battery pack, an air duct is formed between the front circulation fan and the rear circulation fan, and an air duct is formed between the air-conditioning evaporator and the rear circulation fan, and the rear circulation fan is a circulation fan with side air intake; the inverter output unit includes a transformer, a plurality of energy storage converters , a battery system output control cabinet, wherein the battery system output control cabinet is equipped with a number of identical independent control units, each battery pack is connected to a corresponding power controller, the middle line, the total negative output line and the total positive output line of the battery pack connection circuit are connected to the middle line, the total negative output line and the total positive output line corresponding to the DC bus, the DC bus is connected to the independent control units in the battery system output control cabinet, each independent control unit is connected to an independent energy storage inverter, all the energy storage inverters are connected to the transformer, and the transformer is used for output; the transformer is a double-column transformer, and the double-column transformer is correspondingly connected to four evenly distributed energy storage inverters, all the energy storage inverters are of the same model, the battery pack is connected to the inverter The circuit includes a DC circuit breaker CZ-0, a diode D1, a diode D2, a diode D3, a diode D4, a circuit breaker CZ-1, a fast fuse F, a contactor CZ-2, a contactor CZ-3, a contactor CZ-4 and a contactor CZ-5. The negative electrode of the battery pack is connected to the static contact of the contactor CZ-5 and the anode of the diode D1 through a fast fuse F. The cathode of the diode D1 is connected to the moving contact of the contactor CZ-5, the cathode of the diode D2 and the static contact of the contactor CZ-4. The anode of the diode D2 is connected to the moving contact of the contactor CZ-4 and the first static contact of the DC circuit breaker CZ-0. The first moving contact of the DC circuit breaker CZ-0 is connected to the total negative output line of the DC bus. The positive electrode of the battery pack is connected to the static contact of the contactor CZ-2 and the anode of the diode D4 through a fast fuse F, the cathode of the diode D4 is connected to the moving contact of the contactor CZ-2, the cathode of the diode D3 and the static contact of the contactor CZ-3, the anode of the diode D3 is connected to the moving contact of the contactor CZ-3 and the third static contact of the DC circuit breaker CZ-0, and the third moving contact of the DC circuit breaker CZ-0 is connected to the total positive output line of the DC bus; The middle of the battery pack is connected to the static contact of the contactor CZ-1 through a fast fuse F, the moving contact of the contactor CZ-1 is connected to the second static contact of the DC circuit breaker CZ-0, and the second static contact of the DC circuit breaker CZ-0 is connected to the middle line of the DC bus; The circulating air duct is formed by the fireproof panels around it, so that the fan in the battery box forms a double independent circulating air duct, and the temperature control range is 35℃±15℃.

2. The energy storage battery container system according to claim 1, characterized in that: Each energy storage converter is connected to a DC bus through an independent control unit, and each DC bus is connected to a corresponding number of battery packs through several identical power controllers, and all battery packs have the same structure.

3. The energy storage battery container system according to claim 2, characterized in that: The power controller includes a battery pack connection circuit, a battery pack management control box BCMS and a battery pack current sensor. The battery pack current sensor detects the current on the connection line of the battery pack. The output end of the battery pack current sensor is connected to the input end of the battery pack management control box BCMS. The control end of the battery pack management control box BCMS controls the switching elements in the battery pack connection circuit. The battery pack is electrically connected to the corresponding DC bus through the battery pack connection circuit.

4. The energy storage battery container system according to claim 1, characterized in that: The DC circuit breaker CZ-0 is a 3-wire DC circuit breaker with a set current of 630A, the diode D1, the diode D2, the diode D3, and the diode D4 are all anti-mutual charging high-power diodes with a maximum working current of 800A, the contactor CZ-2, the contactor CZ-3, the contactor CZ-4, and the contactor CZ-5 are contactors of the same model with an agreed non-heating current of 800A, and the fast fuses F are all 15S fast fuses with a current limiting of 650A.

5. The energy storage battery container system according to claim 4, characterized in that: The independent control unit includes a corresponding ESMU, a circuit breaker and a fast fuse. The circuit breaker is controlled by the corresponding ESMU. The DC bus is connected to the energy storage inverter through the fast fuse and the circuit breaker in turn. The input end of the ESMU receives the shunt signal of the circuit breaker and the feedback signal of the circuit breaker. The input end of the ESMU also receives the emergency stop input signal, the fire input signal and the energy storage inverter emergency stop signal in the energy storage battery container system. The ESMU is connected to the ESMU of other control units in the output control cabinet of the energy storage battery container system through the CAN bus. The ESMU is also connected to the battery management system control box BCMS of the corresponding battery pack through the CAN bus. The ESMU is respectively connected to the air-conditioning unit and the energy storage inverter through the RS485 bus. The ESMU is connected to the energy management system EMS of the power grid management through the LAN port.

6. The energy storage battery container system according to claim 5, characterized in that: All battery fireproof compartments are configured in an independent battery compartment, the transformer in the output unit is configured in an independent second high-voltage compartment, the several energy storage inverters and the battery system output control cabinet are configured in another independent first high-voltage compartment, and the air-conditioning unit in the energy storage battery container system is configured in an independent control compartment.

7. The energy storage battery container system according to claim 6, characterized in that: The energy storage converters configured in the high-voltage compartment are connected to the battery system output cabinet through a set of DC busbars respectively. The battery system output cabinet is connected to the battery packs in the battery compartment through another four sets of DC busbars. Every two adjacent battery packs are connected to the battery system output cabinet through a set of DC busbars, and each set of DC busbars is independent of each other.

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