CN216086168U - High-power silence power generation package and high-voltage control box thereof - Google Patents

Abstract

The utility model discloses a high-power mute power generation pack and a high-voltage control box thereof, wherein the high-voltage control box comprises a box body, a display control panel and an interface backboard, the high-voltage control box also comprises an equipment power supply unit DC-DC, an energy monitoring unit EMS serving as a central controller, a battery pack management unit BCU used for battery pack management and a plurality of relays controlled to be switched on and switched off by the battery pack management unit BCU, a touch display screen connected with the energy monitoring unit EMS in a signal mode, emergency stop switches and starting switches respectively arranged on two sides of the touch display screen and a plurality of status indicator lamps are arranged on the display control panel, and the interface backboard comprises a plurality of electrical interfaces which are electrically connected with a battery pack, a bidirectional converter and a plurality of charging and discharging interfaces. The high-voltage control box provides a safe use environment for the lithium ion battery pack, and can be used for development of power generation packs of other specifications quickly as a universal module.

Description

High-power silence power generation package and high-voltage control box thereof

Technical Field

The utility model relates to the technical field of mobile power generation, in particular to a high-power mute power generation pack and a high-voltage control box thereof.

Background

The generator sets such as gasoline engines and diesel engines can generate large noise during operation, and are complex to operate and maintain and not ideal generating equipment.

The high-power generation equipment using the lithium ion battery pack as the energy storage unit has the characteristics of long service life, simplicity and easiness in maintenance, silence, no waste gas, environmental friendliness, indoor use and the like, and is ideal power generation equipment.

The conventional high-power generation equipment usually integrates a lithium ion battery pack, a battery management system BMS and a high-power AC converter PCS together, and the temperature rise of the PCS of the converter is too high, so that the safety use environment of the lithium ion battery pack is threatened.

Chinese patent document CN110884300A discloses a high-power mute electric generator car, the generated power reaches 30KW, an energy storage device and a converter are installed inside a chassis of the car, and a lithium battery pack, a battery display unit, an emergency stop switch, a start module, a display unit and a DTU are arranged inside the energy storage device for communication.

In above-mentioned silence generator-truck, converter and energy memory separately place, so can avoid converter PCS high temperature to rise and influence the safe handling of lithium cell group. However, besides the current transformer, the lithium ion battery pack is also mixed with other devices, and the high-low voltage mixed connection of the lithium ion battery pack still poses certain threat to the safety application of the lithium ion battery pack.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-voltage control box, which integrates other electric devices except a converter PCS (personal communications system) so as to improve the use safety of a power generation pack.

To this end, the utility model provides a high voltage control box, which is used in a power generation pack and comprises a box body, a display control panel and an interface backboard, the high-voltage control box also comprises an equipment power supply unit DC-DC arranged in the box body, an energy monitoring unit EMS used as a central controller, a battery pack management unit BCU used for battery pack management, and a relay set controlled by the battery pack management unit BCU to be switched on and off, the BCU is in signal connection with the energy monitoring unit, the display control panel is provided with a touch display screen in signal connection with the energy monitoring unit EMS, an emergency stop switch and a starting switch which are respectively arranged at two sides of the touch display screen, and a plurality of status indicator lamps, the interface backboard comprises a plurality of electrical interfaces which are used for being electrically connected with the battery pack, the bidirectional converter and the plurality of charging and discharging interfaces.

Furthermore, a GPS positioning module in signal connection with the energy monitoring unit EMS is also arranged in the high-voltage control box.

Further, the relay set comprises a positive pole relay K1, a heating relay K2, a quick charging relay K3 and an internal relay K4.

Further, the plurality of electrical interfaces include a set of positive interfaces, a set of negative interfaces, a battery heating interface, a low voltage communication interface, and a dc charging communication port.

Further, a Hall sensor for detecting the current of the battery pack is further arranged in the high-voltage control box, and the Hall sensor is electrically connected with the battery pack management unit BCU.

Further, two fuses including a total positive fuse F1 and a heating fuse F2 are also provided in the above-described high-voltage box.

According to another aspect of the utility model, a high-power mute power generation pack is provided, which comprises a box body, a lithium ion battery pack, a bidirectional converter PCS and a high-voltage control box according to the above description.

The utility model adopts the high-voltage control box to integrate other electric devices except the bidirectional converter PCS together, thereby providing a safe use environment for the lithium ion battery pack; in addition, the high-voltage control box is used as a universal module and supports 19-inch standard cabinet installation, can be used for the development of other battery packs, and reduces the development period and the design difficulty of a high-power generation pack.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate an exemplary embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic perspective view of a high-power mute power generation pack according to the present invention;

fig. 2 is a schematic diagram of the internal structure of a high-power mute power generation pack according to the present invention;

FIG. 3 is an exploded view of a high power mute power generation package according to the present invention;

fig. 4 is a schematic diagram of a front panel of a battery pack compartment of a high power silent power generation pack according to the present invention;

FIG. 5 is an electrical schematic of a high power silent power generation pack according to the present invention;

FIG. 6 is an AC charging pattern for a high power mute power generation pack according to the present invention;

FIG. 7 is a DC charging mode of the high power mute power generation package according to the present invention;

FIG. 8 is a schematic diagram of parallel operation of high power silent power generation packs according to the present invention;

FIG. 9 is a schematic front view of a high voltage control box according to the present invention;

FIG. 10 is a schematic diagram of the back side structure of the high voltage control box according to the present invention;

FIG. 11 is a circuit diagram of a high voltage control box according to the present invention; and

fig. 12 is a circuit diagram of the high voltage control box according to the present invention applied to a high power mute electric generation pack.

Detailed Description

It should be noted that the examples and features of the examples in this application may be combined with each other without conflict. The utility model will be described in detail below with reference to the accompanying drawings and examples.

Fig. 1-5 illustrate some examples according to the present invention.

Referring to fig. 1 to 5 in combination, the high-power mute power generation package of the present invention includes a box 10, a lithium ion battery pack 20, a bidirectional ac device PCS 30, and a high-voltage control box 40.

The inner space of the box body 10 is divided into a battery pack compartment 11 and an equipment compartment 12 which are independent from each other. The lithium ion battery pack is arranged in the battery pack partition. In one example, the box size is 1600 x 1100 x 1000mm (length, width, height) and the total weight is 1200 KG.

Specifically, the interior space of the box is divided up and down by the top plate (cross partition) 13 of the battery pack compartment, while being divided forward and backward by the panels (vertical partitions) 14 of the battery pack compartment, so that the equipment compartment extends through the front and top sides of said battery pack compartment. The battery pack compartment 11 is a water tight sealed compartment.

The high voltage control box 40 and the bidirectional alternator PCS 30 are disposed on a set of flying beams 18, which are remote from each other and are not in contact with the horizontal and vertical partitions.

The wall of the equipment compartment 12 is provided with a rain-proof air inlet 11a and a rain-proof air diffuser 11b, and the rain-proof air diffuser 11b is arranged at the position facing the air exhaust outlet of the bidirectional air exchanger 30.

A group of electrical interfaces are arranged on the panel 14 of the battery pack compartment, and an MSD (safety fuse) heating wire socket 141, a low-voltage communication connector socket 142, a battery negative electrode socket 143 and a battery positive electrode socket 144 are arranged from left to right in sequence. The lithium ion battery pack is connected to other electrical devices through these electrical interfaces.

A three-phase ac interface 151, an ac slow charging interface 152, a dc fast charging interface 153, and an ac breaker 154 are provided on the box panel 15, and a rain shield 155 is provided above these interfaces.

And the alternating current slow charging interface and the direct current fast charging interface are in communication connection with the BCU so as to provide the respective interface states to the BCU.

The panel 15 of the box body is embedded with a display control panel 41 of the high-voltage control box 40, and is provided with a transparent blocking window 16 which can be opened and closed for realizing the rainproof shielding of the display control panel 41.

The waterproof and dustproof grade of the high-power mute power generation package can reach IP55, and the high-power mute power generation package is allowed to be used in rainy days.

The bottom of the box 10 is a tray structure 17 to facilitate handling by fork handling equipment such as a forklift.

The lithium ion battery pack 20 is arranged in the battery pack separation cavity 11 in an upper layer and a lower layer, and the upper layer is supported by a plurality of upright posts. In one example, the module grouping mode is 2P7S, the system combination mode is 196S2P (formed by connecting 28 modules in series), the single cell capacity is 80AH, the battery pack power is 100.4kWh, and the battery pack voltage is 627.2V.

One BMS sensing slave board, such as MC05-64, is provided every seven modules for monitoring cell voltage and temperature of the battery pack, and a heating film is provided for this purpose, and heating is performed at a temperature lower than the lithium ion battery operating temperature range, in one example, the power generation pack charging operating temperature range set before the heating film is not set is 0 ℃ -55 ℃, the power generation pack charging operating temperature range set after the heating film is set is-20 ℃ -55 ℃, and heating is not required in the discharged state.

A bidirectional AC device PCS, such as a 30KW bidirectional DC/AC power converter, supports 380/220V AC on the AC side and 150-750 Vdc on the DC side, and is used for AC-DC conversion during charging and discharging of a battery pack.

With reference to fig. 5, 9 to 12, the high voltage control box 40 includes a box body 420, a display control panel 410, and an interface backplane 430, and further includes an energy monitoring unit EMS41, a touch screen 42 in signal connection with the energy monitoring unit EMS41, a GPS positioning module 43, and a battery management unit BCU44, an equipment power supply unit DC/DC (24V)45 for supplying power to each equipment in the power generation package, and a relay set 46 controlled by the battery management unit BCU to be turned on or off.

The display control panel 410 is provided with a touch screen 42, and the display control panel is provided with a start switch 411 and an emergency stop switch 412, wherein the start switch is used for powering on and operating the equipment, and the emergency stop switch is used for powering off and operating the equipment.

The touch screen 42, such as a TPC7602TD resistive touch screen, provides a user interactive software interface for a user to select charging/discharging, query device status, query battery pack state of charge, etc. information.

The display control panel is also provided with a group of status indicator lights 413, such as an operation indicator light, a charging indicator light and a fault indicator light. The display control panel is further provided with a debugging interface 414 for technicians to debug the high-voltage control box.

The interface back plate 430 is provided with a group of positive interfaces, a group of negative interfaces, a battery heating interface 437, a low-voltage communication interface 438 and a direct-current charging communication port 439. The positive interfaces are a battery positive interface 431, a PCS positive interface 432 and a DC charging positive interface 433, and the negative interfaces are a battery negative interface 434, a PCS negative interface 435 and a DC charging negative interface 436.

The interfaces 431 and 439 correspond to the ports of the wirings L1 to L22, and are not described in detail herein. Through these interfaces, the high voltage control box is connected with a set of electrical interfaces arranged on the panel 14 of the battery pack separating cavity, a plurality of charge-discharge interfaces arranged on the box body panel 15 and the bidirectional AC connector PCS in an electric mode, for example, the power generation pack is convenient to assemble by quickly plugging and unplugging a wire harness.

It should be noted that, the high voltage control box as a general module for battery pack development can be used in silent power generation devices with other structures to shorten the development period and design difficulty, for example, the power generation pack still has certain universality during specification adjustment.

The EMS41 communicates with the PCS of the bidirectional energy storage converter and the BMS of the battery pack through an Ethernet interface and a CAN interface to realize energy scheduling of a battery pack energy system.

The GPS positioning module 43 transmits positioning information to the EMS so that the geographical location of the power generation packet can be remotely inquired.

The battery pack management unit BCU44 is configured to receive the collected temperature and voltage information of each battery pack (collected by each temperature and voltage collection board) and the current information of the battery pack (collected by the hall sensor), and perform on-off control on the relay unit 46 according to the battery pack and the user instruction state.

The three-phase AC interface is controlled by the relay group to realize three-phase AC charging and discharging, the DC quick charging interface is controlled by the relay group to realize DC quick charging, and the AC slow charging interface is controlled by the relay group to realize AC slow charging.

The relay group 46 comprises a positive relay K1, a quick charging relay K2, a heating relay K3 and an internal relay K4 for supplying power to a BMS slave board, wherein the relays are normally open relays and are switched on when power is supplied. The positive relay enables the positive pole of the battery pack and the PCS to be connected when the positive relay is powered on, the direct-current quick-charging interface and the positive pole of the battery pack are connected when the quick-charging relay is powered on, the heating film is powered on and heated when the heating relay is powered on, and the BMS slave board power supply relay is used for supplying power to each monitoring slave board in the battery pack.

The low-voltage power supply of the whole set of equipment is realized by converting the voltage of the battery pack into 24V direct-current voltage through an equipment power supply unit DC/DC, and the DC/DC start-stop is controlled by a direct-current breaker on a display control panel in a high-voltage control box.

In one example, the model of the energy monitoring unit EMS is an EMS-DC-4G chip, which is provided by Shenzhen rectangular science and technology Limited in China; the model of the two-way converter PCS is selected from PCS2-30K-CN, which is provided by China Hongyun electric products Co Ltd; the BCU is selected from BCU-05 chip, provided by New energy science and technology Limited, available in China Anhui Zhi, and the devices are commercially available, and the detailed structure and mechanism thereof are not described herein.

In the utility model, an energy monitoring unit EMS (controller), a touch screen, a GPS module and the like form an energy monitoring system, and the monitoring and processing of the whole system information are realized through communication modes such as Ethernet, CAN, 485 and the like. The battery management unit BCU (controller), the temperature and voltage acquisition board, the Hall sensor and the like form a battery management system BMS.

In the utility model, the EMS manages and controls the BCU and the PCS to realize the controlled switching of various charging modes and discharging operation, so that the EMS simultaneously monitors the fault states of the PCS and the BCU except the fault monitoring and protection of the BCU on the battery pack and the fault monitoring and protection of the PCS on the PCS, thereby providing one layer of safety protection for the use of a power generation packet.

In addition, the EMS can be used for communicating with a remote platform, on one hand, self data are provided for the remote platform such as a mobile terminal for monitoring, and on the other hand, remote control can be realized, such as unattended charging operation.

Next, various charge/discharge operation modes of the power generation pack will be described.

First, electricity generation package electric wire netting charges

The battery pack of the power generation pack can be charged by using three-phase power of a power grid 380, and fig. 6 is a charging principle diagram of the battery pack. When the power generation pack battery pack is charged, the power grid side inputs 380 alternating current power supply, and the alternating current power supply outputs direct current to charge the battery pack after being converted by the PCS. The maximum charging power of the battery pack is 30 KW.

During charging, the BMS in the battery pack communicates with the energy monitoring system and reports battery information parameters, and the energy monitoring system judges whether charging current and charging are finished according to the BMS information and controls the PCS charging process in a network port communication mode; the energy monitoring system can transmit battery information and charging information to the rear data monitoring platform through GPRS, and meanwhile, a user can also monitor the charging process of the fixed battery pack through the APP at the mobile phone end of the energy monitoring system.

The charging steps of the charging mode are as follows:

1) the three-phase alternating current of the external power grid power distribution cabinet is connected to a 380V charging socket of the power generation pack through an external power line configured on the power generation pack;

2) closing a starting switch on a display control panel of the high-voltage control box, activating a BMS in the fixed battery pack after closing the starting switch, and simultaneously electrifying the EMS system to start running;

3) closing an alternating current breaker on an external power grid power distribution cabinet to enable three-phase alternating current in a power grid to reach the output end of a breaker of a silent power generation system;

4) closing an alternating current breaker on the mute power generation pack, outputting three-phase alternating current of a power grid to a PCS alternating current input end at the moment, and starting the PCS;

6) clicking a charge starting button on a user software interface of a touch screen, changing the EMS state into an alternating current charging state, closing a battery pack anode relay after a BMS detects the EMS state and self-detects an unlimited charging fault, conducting the direct current of the battery pack with the direct current end of a PCS, and simultaneously controlling the PCS to charge the battery pack by the EMS;

7) after the charging is finished, the BMS can automatically disconnect the charging loop, and meanwhile, the EMS controls to send a charging stopping instruction to the PCS to finish the charging;

8) after charging is finished, a user needs to disconnect the alternating current circuit breakers on the power generation packs in sequence and disconnect the power supply of the starting switch system. And disconnecting the external alternating current power distribution cabinet breaker and simultaneously detaching the charging connection wiring harness.

Second, the electricity generation package direct current fills electric pile and charges

The power generation pack battery pack can also be charged by using an electric automobile direct current charging pile, and fig. 7 is a charging principle diagram. When the power generation pack battery pack is charged, the direct current charging pile outputs a direct current power supply to directly charge the battery pack. The maximum charging power set by the battery pack is 50KW, and the parameter is adjustable.

And when the battery pack is charged, the BMS in the battery pack communicates with the energy monitoring system to report battery information parameters. BMS and direct current fill electric pile and communicate according to electric automobile national standard charging protocol in the charging process. The energy monitoring system can transmit battery information and charging information to the rear data monitoring platform through GPRS, and meanwhile, a user can also monitor the charging process of the fixed battery pack through the APP at the mobile phone end of the energy monitoring system.

The charging steps of the charging mode are as follows:

1) closing a starting switch on a display control panel, activating a BMS in the battery pack after closing the switch, and simultaneously electrifying the EMS system to start running;

2) connecting a plug of a charging wire on the direct current charging pile to a direct current charging socket on the mute power generation packet;

3) punching a card or setting charging cost of the direct current charging pile to click a confirmation or charging start button on the direct current charging pile, starting charging of the battery pack, exchanging information between the BMS and the direct current charging pile according to a national standard charging protocol in the charging process, automatically disconnecting a charging loop when the BMS and the direct current charging pile detect a fault or are full, and finishing the charging;

4) and after the charging is finished, whether the battery packs are fully charged or not is checked through the display screen, and the SOC state is 100% when the battery packs are fully charged.

5) The battery pack is full of the charging connecting line of the direct current charging pile, and the starting switch on the control cabinet is turned off to complete the charging.

Third, the electricity generation package exchanges and fills the electric pile and charges

The connection and charging steps of the power generation package and the alternating current charging pile are the same as the charging step of the direct current charging pile.

Fourth, the power generation is packed singly and is packed to generate electricity

The power generation pack battery set outputs 380V three-phase alternating current externally through the PCS bidirectional converter, and the maximum power generation power of a single power generation pack is 30 KW.

During power generation, the BMS in the battery pack communicates with the energy monitoring system to report battery information parameters, the energy monitoring system judges whether discharge current and discharge are over-discharged or not according to the BMS information, and controls the PCS discharge process in a network port communication mode; the energy monitoring system can transmit battery information and discharge information to the iron tower background data monitoring platform through GPRS, and meanwhile, a user can also control the discharge process of the fixed battery pack through the energy monitoring system control mobile phone APP.

The power generation steps of the power generation package are as follows:

1) an external power line configured by the power generation pack is connected to a 380V socket on the charging and discharging cabinet, and the other end of the external power line is led to the power consumption load distribution cabinet;

2) closing a starting switch on the display control cabinet, activating a BMS in the fixed battery pack after closing the switch, and simultaneously electrifying the EMS system to start running;

3) a user starts power generation by clicking a power generation starting button on a touch screen, a BMS closes an anode relay after detecting that the system is in a power generation state, self-checks no power generation prohibition fault, and simultaneously an EMS controls a PCS to start external power generation;

4) closing an alternating current breaker on the mute power generation pack to enable a power generation power supply to be connected to a load power distribution cabinet end;

5) closing an alternating current breaker on the negative power distribution cabinet to provide three-phase alternating current for a load;

6) in the power generation process, a user can monitor parameters of the fixed battery pack and power generation parameters of the PCS through a touch screen or a mobile phone user side, and the battery pack generates power outwards according to load power under the condition that the maximum discharge power of the battery pack and the PCS is not exceeded;

7) after the power generation is finished, clicking a power generation stopping button through a touch screen, and disconnecting a power generation loop by the system;

8) disconnecting the alternating current circuit breaker on the mute power generation packet, and simultaneously disconnecting the alternating current circuit breaker at the load power distribution cabinet end to finish the power generation;

9) and (5) removing the external power generation wiring harness to finish the power generation. And paying attention to timely power supplement to the battery pack after power generation is finished.

Five, power generation pack and multi-pack parallel machine power generation

And a PCS parallel machine communication interface is arranged on a panel of the box body and used for parallel machine power generation after the plurality of power generation packages are in wire communication.

The system simultaneously supports touch screen display and mobile phone end monitoring display, and supports single-package and multi-package parallel operation. The maximum power of single-pack power generation is 30KW, and when the parallel operation power generation is carried out, the parallel operation of three power generation packs can be supported to the maximum extent, so that the maximum 90KW power generation power is realized, and the power generation business of the iron tower communication base station power generation and the conventional external energy management such as banks, markets, schools, construction sites and the like can be met.

The parallel operation power generation process comprises the following steps:

1) connecting three power generation packages according to the parallel machine communication wiring harness shown in the figure 8, namely connecting PCS parallel machine communication interfaces arranged on a panel of the box body through the communication wiring harness;

2) connecting the alternating current sockets on the three battery packs with the portable distribution box through three parallel power lines;

3) connecting a parallel operation output line of the portable distribution box to a leakage protection front end of a load end (at the moment, the leakage protection is disconnected);

4) closing the starting switches of the three power generation packages, and starting the three power generation packages to work;

5) closing the leakage protectors on the three power generation packs;

6) finding out a power generation packet with the ID of 1, clicking a power generation button on the touch screen, and outputting an alternating current power supply to the outside by the battery packet; after the power generation pack with the ID of 1 is started successfully and 380V three-phase alternating current is output to the outside, sequentially clicking power generation buttons of the power generation packs with the IDs of 2 and 3; after the three battery packs externally output 380V three-phase electricity, the output power supplies of the three groups of power generation packs are connected in parallel through the portable distribution box and then output to the leakage protection switch at the load end;

7) closing the load-out leakage protection switch to complete parallel operation power generation;

8) after the power generation is finished, firstly disconnecting the switch at the load end by pressing reverse operation, then sequentially clicking the power generation stopping buttons on the display screens of the three power generation packs, sequentially disconnecting the leakage switches and the starting switches on the three power generation packs, and finally disconnecting the power supply and the communication parallel machine wiring harness to finish the power generation.

After power generation is finished, each battery pack needs independent power compensation, and a user can select a direct current charging pile to compensate power or a three-phase alternating current of a power grid according to actual conditions.

The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A high-voltage control box is characterized by being used in a power generation package and comprising a box body, a display control panel and an interface back plate,

the high-voltage control box also comprises an equipment power supply unit DC-DC arranged in the box body, an energy monitoring unit EMS used as a central controller, a battery pack management unit BCU used for battery pack management, and a relay set controlled by the battery pack management unit BCU to be switched on and off, wherein the battery pack management unit BCU is in signal connection with the energy monitoring unit,

the display control panel is provided with a touch display screen connected with the energy monitoring unit EMS through signals, an emergency stop switch and a starting switch which are respectively arranged at the two sides of the touch display screen, and a plurality of status indicator lamps,

the interface back plate comprises a plurality of electrical interfaces which are used for being electrically connected with the battery pack, the bidirectional converter and the charging and discharging interface.

2. The high-voltage control box according to claim 1, wherein a GPS positioning module is further arranged in the high-voltage control box and is in signal connection with an energy monitoring unit EMS.

3. The high voltage control box of claim 1, wherein the relay set comprises a positive relay K1, a heating relay K2, a quick charge relay K3, and an internal relay K4.

4. The high voltage control box of claim 1, wherein the plurality of electrical interfaces includes a set of positive interfaces, a set of negative interfaces, a battery heating interface, a low voltage communication interface, a dc charging communication port.

5. The high-voltage control box according to claim 1, wherein a Hall sensor for detecting the current of the battery pack is further arranged in the high-voltage control box, and the Hall sensor is electrically connected with a battery pack management unit (BCU).

6. The high voltage control box according to claim 1, wherein two fuses are further provided in said high voltage control box, said two fuses including a total positive fuse F1 and a heating fuse F2.

7. A high-power mute power generation pack is characterized by comprising a box body, a lithium ion battery pack, a bidirectional converter PCS and a high-voltage control box, wherein the high-voltage control box is the high-voltage control box according to any one of claims 1 to 6.

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