Plant power supply system

Abstract

The invention relates to a factory building power supply system. The plant power supply system comprises an energy storage converter and a combiner box; a direct-current busbar is arranged in the combiner box, the energy storage converter is connected with the direct-current busbar, and the direct-current busbar is further connected with electric equipment; the energy storage converter is used for converting alternating current input by an external alternating current power supply into direct current; and the direct current busbar is used for transmitting the direct current to the electric equipment, receiving the discharge energy of the electric equipment and returning the discharge energy to the electric equipment. By adopting the power supply system for the factory building, power can be well supplied to electric equipment, the cost can be reduced, and the installation and debugging period can be shortened.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a power supply system for a factory building. Background Art

[0002] With the development of new energy technology, batteries are being used in more and more fields, for example, using batteries to build energy storage systems and using batteries as the power of new energy vehicles.

[0003] In the battery manufacturing production line, there are battery manufacturing equipment, testing equipment and formation equipment, etc. At present, how to provide power for testing equipment and formation equipment has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] Based on the above problems, the present application provides a factory power supply system that can well supply power to electrical equipment, reduce costs, and shorten installation and commissioning cycles.

[0005] The present application provides a power supply system for a factory building. The power supply system for a factory building includes an energy storage converter and a junction box; a DC busbar is provided in the junction box, the energy storage converter is connected to the DC busbar, and the DC busbar is also connected to an electrical device; the energy storage converter is used to convert AC power input from an external AC power source into DC power; the DC busbar is used to transmit DC power to the electrical device, and to receive the discharge energy of the electrical device and return the discharge energy to the electrical device.

[0006] In the technical solution of the embodiment of the present application, the energy storage converter is used to convert AC power into DC power, which can reduce the configuration power, improve the charging conversion efficiency and the discharging conversion efficiency, and reduce the plug-in box. Therefore, on the basis of ensuring the power supply requirements of the test equipment and the formation equipment, the cost can be reduced and the installation and commissioning cycle can be shortened. Furthermore, the DC busbar in the junction box can not only transmit DC power, but also realize energy recycling, thereby achieving the effect of energy saving, consumption reduction and cost reduction.

[0007] In some embodiments, a DC circuit breaker is also provided in the junction box; the DC circuit breaker is connected between the energy storage converter and the DC busbar. In the technical solution of the embodiment of the present application, the DC circuit breaker can cut off the DC output of the energy storage converter in various scenarios, thereby protecting the energy storage converter and electrical equipment.

[0008] In some embodiments, a power equipment circuit breaker is also provided in the combiner box, and the power equipment circuit breaker is connected between the DC busbar and the power equipment. In the technical solution of the embodiment of the present application, the power equipment circuit breaker can cut off the connection between the DC busbar and the power equipment in various scenarios, thereby protecting the DC busbar and the power equipment.

[0009] In some embodiments, the energy storage converter includes a main energy storage converter and a backup energy storage converter, and the junction box is also provided with a switching circuit breaker; the switching circuit breaker is respectively connected to the main energy storage converter, the backup energy storage converter and the power-consuming equipment; the switching circuit breaker is used to cut off the connection between the main energy storage converter and the power-consuming equipment when the main energy storage converter fails, and connect the backup energy storage converter to the power-consuming equipment. In the technical solution of the embodiment of the present application, a switching circuit breaker is provided, and in the case of a failure of the main energy storage converter, the backup energy storage converter can be used to replace the main energy storage converter, thereby ensuring normal power supply to the power-consuming equipment.

[0010] In some embodiments, multiple main energy storage converters, junction boxes, and power-consuming devices are provided, and one backup energy storage converter is provided; each main energy storage converter is connected to one power-consuming device through a switching circuit breaker in a corresponding junction box; and the backup energy storage converter is connected to multiple power-consuming devices through switching circuit breakers in multiple junction boxes. In the technical solution of the embodiment of the present application, the backup energy storage converter is used to replace the main energy storage converter, which can ensure the normal power supply of the power-consuming devices.

[0011] In some embodiments, the combiner box includes an electrical device interface; the electrical device interface is connected to the electrical device. In the technical solution of the embodiment of the present application, the combiner box is provided with an electrical device interface, which is convenient for connecting the combiner box with the electrical device, thereby supplying power to the electrical device, setting relevant parameters of the electrical device, collecting data of the electrical device and performing analysis and statistics.

[0012] In some embodiments, the power-consuming device includes a plurality of power-consuming units; each power-consuming unit is connected to the DC busbar via a power-consuming device interface. In the technical solution of the embodiment of the present application, the power-consuming device interface is used to facilitate power supply to each power-consuming unit.

[0013] In some embodiments, the power adaptation coefficient between the energy storage converter and the power-consuming device is within 0.3-0.7. In the technical solution of the embodiment of the present application, setting the power adaptation coefficient can better supply power to the power-consuming device.

[0014] In some embodiments, the power-consuming device includes at least one of a capacity machine and a formation machine. In the technical solution of the embodiment of the present application, the power supply device can supply power to a variety of power-consuming devices and is applicable to a variety of application scenarios.

[0015] In some embodiments, the electrical equipment includes a capacity divider, which is connected to a DC busbar in a junction box of a power supply system of a plant. In the technical solution of the embodiment of the present application, the capacity divider can be used to set the charging parameters and discharging parameters of the battery cell, and can also collect the charging data and discharging data of the battery cell, and perform statistical processing on the data to screen the battery cell, thereby better assisting battery manufacturing and improving battery quality.

[0016] In some embodiments, a control chip and a battery cell are provided in the capacity distribution cabinet; the control chip is used to receive feedback signals from the battery cell and control the charging and discharging process and the charging and discharging current according to the feedback signals. In the technical solution of the embodiment of the present application, the control chip can well control the charging and discharging of the battery cell, thereby efficiently performing battery cell testing and improving the efficiency of battery production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the optional embodiments below. The accompanying drawings are only used for the purpose of illustrating the optional embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0018] Figure 1 This is one of the structural schematic diagrams of a factory power supply system according to an embodiment of the present application;

[0019] Figure 2 This is the second structural diagram of the power supply system of a factory building according to an embodiment of the present application;

[0020] Figure 3 This is the third structural diagram of the power supply system of a factory building according to an embodiment of the present application;

[0021] Figure 4 This is the fourth structural diagram of the factory power supply system of one embodiment of the present application;

[0022] Figure 5 This is the fifth structural diagram of the factory power supply system of one embodiment of the present application;

[0023] Figure 6 This is the sixth structural diagram of the power supply system of a factory building according to an embodiment of the present application;

[0024] Figure 7 This is the seventh structural diagram of the power supply system of a factory building according to an embodiment of the present application;

[0025] Figure 8 This is the eighth structural diagram of the power supply system of a factory building according to an embodiment of the present application;

[0026] Fig. 9 It is a schematic diagram of the structure of a capacity distribution cabinet according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0029] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] With the development of new energy technology, the application fields of batteries are increasing. For example, batteries are used to build energy storage systems and batteries are used as the power of new energy vehicles. In the battery manufacturing production line, there are battery manufacturing equipment, test equipment and formation equipment. At present, ACDC (Alternating Current Direct Current, AC / DC) power converters are often used to power test equipment and formation equipment, that is, ACDC power converters convert AC power into DC power for test equipment and formation equipment. However, there are some problems with ACDC power converters. For example, in order to ensure the normal operation of the test equipment, the ACDC power converter needs to be configured according to the maximum power, resulting in a high cost of the ACDC power converter; the charging conversion efficiency and discharge conversion efficiency of the ACDC power converter are not high, resulting in further cost increases; the ACDC power converter requires more plug-in boxes in the factory to meet the equipment interface requirements, resulting in high costs, and the installation and commissioning cycle is also relatively long. Therefore, how to power test equipment and formation equipment has become a technical problem that needs to be solved urgently.

[0035] The embodiment of the present application provides a plant power supply system, which includes a power storage converter (Power Conversion System, PCS) and a junction box; a DC busbar is provided in the junction box, the energy storage converter is connected to the DC busbar, and the DC busbar is also connected to the power-consuming equipment; the energy storage converter converts the AC power input from the external AC power supply into DC power; the DC busbar transmits the DC power to the power-consuming equipment, and receives the discharge energy of the power-consuming equipment and returns the discharge energy to the power-consuming equipment. Compared with the use of ACDC power converter, the embodiment of the present application uses an energy storage converter to convert AC power into DC power, which can reduce the configuration power, improve the charging conversion efficiency and the discharge conversion efficiency, and reduce the plug-in box. Therefore, on the basis of ensuring the power supply requirements of the test equipment and the formation equipment, the cost can be reduced and the installation and commissioning cycle can be shortened. Furthermore, the DC busbar in the junction box can not only play the role of transmitting DC power, but also realize the recycling of energy, thereby achieving the effect of energy saving and cost reduction.

[0036] According to some embodiments of the present application, referring to Figure 1 , a power supply system for a factory building is provided. The power supply system for a factory building includes an energy storage converter 10 and a junction box 20; a DC busbar 201 is provided in the junction box 20, the energy storage converter 10 is connected to the DC busbar 201, and the DC busbar 201 is also connected to an electrical device; the energy storage converter 10 is used to convert the AC power input from an external AC power source into DC power; the DC busbar 201 is used to transmit the DC power to the electrical device, and receive the discharge energy of the electrical device and return the discharge energy to the electrical device.

[0037] In the embodiment of the present application, the power supply system of the plant includes an energy storage converter 10 and a junction box 20, a DC busbar 201 is provided in the junction box 20, the energy storage converter 10 is respectively connected to the AC power supply and the DC busbar 201 outside the power supply system of the plant, and the DC busbar 201 is also connected to the power-consuming equipment. The external AC power supply inputs AC power to the energy storage converter 10, the energy storage converter 10 converts the AC power into DC power, and transmits the DC power to the DC busbar 201, and the DC busbar 201 transmits the DC power to the power-consuming equipment on the battery cell production line.

[0038] For example, the energy storage converter 10 is connected to an external AC power source and a DC busbar 201 respectively, and the DC busbar 201 is also connected to a capacity machine on a battery cell production line, which is a device for charging and discharging the battery cells. The AC power source inputs 380V AC power to the energy storage converter 10, and the energy storage converter 10 converts the 380V AC power into 700V DC power, and transmits the 700V DC power to the DC busbar 201, and the DC busbar 201 transmits the 700V DC power to the capacity machine on the battery cell production line.

[0039] During the discharge process of the electric device, part of the discharge energy will be transmitted to the DC busbar 201 along the connection line between the DC busbar 201 and the electric device. In this case, the DC busbar 201 receives this part of the discharge energy and retransmits the discharge energy back to the electric device, and the electric device can reuse this part of the energy, thereby achieving the effect of energy saving and consumption reduction.

[0040] For example, the capacity machine performs a charging test on a part of the battery cells and a discharging test on another part of the battery cells. During the test, the discharge energy is transmitted to the DC bus 201 along the connecting line between the capacity machine and the DC bus 201. The DC bus 201 transmits the discharge energy back to the capacity machine to charge the battery cells under the charging test.

[0041] Optionally, the DC busbar may be a copper busbar.

[0042] Optionally, the energy storage converter 10 is connected to the DC busbar 201 by a positive connection line and a negative connection line, and the positive connection line and the negative connection line can each be two cables. The positive connection line and the negative connection line can each be a cable with a cross-sectional area of ​​300mm 2 The soft copper wire is equipped with SC300-10 connection terminal.

[0043] It should be noted that the number and type of connecting lines are not limited to the above description and can be set according to actual conditions.

[0044] Taking the current battery production line plant as an example, the electrical equipment includes a formation machine and a capacity machine. The configuration power of the ACDC power converter for the formation machine is 3136kW, and the configuration power for the capacity machine is 7560kW, so the total configuration power of the ACDC power converter is 10696kW. The configuration power of the energy storage converter for the formation machine is 2200kW, and the configuration power for the capacity machine is 4400kW, so the total configuration power of the energy storage converter is 6600kW. In addition, the charging conversion efficiency of the ACDC power converter is 94%, and the discharge conversion efficiency is 90%; while the charging conversion efficiency of the energy storage converter is 99%, and the discharge conversion efficiency is 99%. Compared with the use of parallel power supply, the use of energy storage converter has low configuration power, high charge and discharge conversion efficiency, and good economic benefits. Furthermore, the use of ACDC power converter requires 70 plug-in boxes to meet the equipment interface requirements, while the use of energy storage converter does not require plug-in boxes, so the use of energy storage converter system is lower in cost. In addition, the use of ACDC power converters requires the installation of two partition walls in the factory, while the use of energy storage inverters does not require the installation of partition walls in the factory. Therefore, the use of energy storage inverters can shorten the installation and commissioning time by 10 days, thereby shortening the installation and commissioning cycle.

[0045] It can be seen intuitively from the above data that compared with using ACDC power converters, using energy storage inverters to power electrical equipment on battery cell production lines can significantly reduce costs and shorten installation and commissioning cycles.

[0046] In the above embodiment, the power supply system of the plant includes an energy storage converter and a junction box; a DC busbar is provided in the junction box, the energy storage converter is connected to the DC busbar, and the DC busbar is also connected to the power-consuming equipment; the energy storage converter converts the AC power input from the external AC power supply into DC power; the DC busbar transmits the DC power to the power-consuming equipment, and receives the discharge energy of the power-consuming equipment and returns the discharge energy to the power-consuming equipment. Compared with the use of the ACDC power converter, in the technical solution of the embodiment of the present application, the energy storage converter is used to convert the AC power into DC power, which can reduce the configuration power, improve the charging conversion efficiency and the discharge conversion efficiency, and reduce the plug-in box. Therefore, on the basis of ensuring the power supply requirements of the test equipment and the formation equipment, the cost can be reduced and the installation and commissioning cycle can be shortened. Furthermore, the DC busbar in the junction box can not only play the role of transmitting DC power, but also realize the recycling of energy, thereby achieving the effect of energy saving and cost reduction.

[0047] According to some embodiments of the present application, referring to Figure 2 A DC circuit breaker 202 is also provided in the combiner box 20 ; the DC circuit breaker 202 is connected between the energy storage converter 10 and the DC busbar 201 .

[0048] In the embodiment of the present application, a DC circuit breaker 202 is provided in the combiner box 20 . The DC circuit breaker 202 is connected to the energy storage converter 10 via a cable. The DC circuit breaker 202 is used to cut off the DC output of the energy storage converter 10 .

[0049] For example, when the energy storage converter 10 fails, the DC output of the energy storage converter 10 can be cut off by the DC circuit breaker 202; or, when the energy storage converter 10 does not need to supply power to the electrical equipment, the DC output of the energy storage converter 10 can also be cut off by the DC circuit breaker 202. It should be noted that the application scenario of the DC circuit breaker 202 is not limited to the above description, and can also be applied to other scenarios.

[0050] In the above embodiment, a DC circuit breaker is also provided in the junction box; the DC circuit breaker is connected between the energy storage converter and the DC busbar. In the technical solution of the embodiment of the present application, the DC circuit breaker can cut off the DC output of the energy storage converter in various scenarios, thereby protecting the energy storage converter and electrical equipment.

[0051] According to some embodiments of the present application, referring to Figure 3 The combiner box 20 is also provided with an electric equipment circuit breaker 203, and the electric equipment circuit breaker 203 is connected between the DC busbar 201 and the electric equipment.

[0052] In the embodiment of the present application, the combiner box 20 is further provided with an electric device circuit breaker 203, one end of which is connected to the DC busbar 201 and the other end is connected to the electric device. The electric device circuit breaker 203 is used to cut off the connection between the DC busbar 201 and the electric device.

[0053] For example, in the case of a failure of the energy storage converter 10, the connection between the DC busbar 201 and the power device can be cut off by the power device circuit breaker 203; or, in the case of a failure of the DC busbar 201, the connection between the DC busbar 201 and the power device can be cut off by the power device circuit breaker 203; or, in the case where there is no need to supply power to the power device, the connection between the DC busbar 201 and the power device can be cut off by the power device circuit breaker 203. It should be noted that the application scenario of the power device circuit breaker 203 is not limited to the above description, and can also be applied to other scenarios.

[0054] In the above embodiment, a power equipment circuit breaker is also provided in the combiner box, and the power equipment circuit breaker is connected between the DC busbar and the power equipment. In the technical solution of the embodiment of the present application, the power equipment circuit breaker can cut off the connection between the DC busbar and the power equipment in various scenarios, thereby protecting the DC busbar and the power equipment.

[0055] According to some embodiments of the present application, referring to Figure 4The energy storage converter 10 includes a main energy storage converter 101 and a backup energy storage converter 102, and the junction box 20 is also provided with a switching circuit breaker 204; the switching circuit breaker 204 is respectively connected to the main energy storage converter 101, the backup energy storage converter 102 and the electrical equipment; the switching circuit breaker 204 is used to cut off the connection between the main energy storage converter 101 and the electrical equipment when the main energy storage converter 101 fails, and connect the backup energy storage converter 102 to the electrical equipment.

[0056] In the embodiment of the present application, a switching circuit breaker 204 is further provided in the combiner box 20, and the switching circuit breaker 204 is respectively connected to the main energy storage converter 101, the backup energy storage converter 102 and the power-consuming device. In the event of a failure of the main energy storage converter 101, the switching circuit breaker 204 can be used to disconnect the connection between the main energy storage converter 101 and the power-consuming device, and the switching circuit breaker 204 can be used to connect the backup energy storage converter 102 to the power-consuming device.

[0057] In some embodiments, there are multiple main energy storage inverters 101, junction boxes 20 and electrical equipment, and one backup energy storage inverter 102 is provided; each main energy storage inverter 101 is connected to an electrical equipment through a switching circuit breaker 204 in the corresponding junction box 20; the backup energy storage inverter 102 is respectively connected to multiple electrical equipment through the switching circuit breakers 204 in multiple junction boxes 20.

[0058] In the embodiment of the present application, the power supply system of the plant may include multiple energy storage converters, one of which may be used as a backup energy storage converter 102, and the remaining energy storage converters may be used as the main energy storage converter 101. Figure 5 The power supply system of the plant includes 7 energy storage converters, one of which is used as a backup energy storage converter 102, and the other 6 energy storage converters are used as main energy storage converters 101. Each main energy storage converter 101 is connected to an electric device through a switching circuit breaker 204 in a corresponding combiner box 20; the backup energy storage converter 102 is connected to multiple electric devices through the switching circuit breakers 204 in multiple combiner boxes 20.

[0059] In some embodiments, the switching circuit breaker 204 may include a first switching circuit breaker 2041 and a second switching circuit breaker 2042, wherein the first switching circuit breaker 2041 is connected to the main energy storage converter 101 and the power device, respectively, and the second switching circuit breaker 2042 is connected to the backup energy storage converter 102 and the power device, respectively. In the event of a failure of the main energy storage converter 101, the first switching circuit breaker 204 cuts off the connection between the main energy storage converter 101 and the power device, and the second switching circuit breaker 204 connects the backup energy storage converter 102 to the power device.

[0060] In some embodiments, the first switching circuit breaker 204 is used as the DC circuit breaker 202 corresponding to the main energy storage converter 101, and the second switching circuit breaker 204 is used as the DC circuit breaker 202 corresponding to the backup energy storage converter 102. Figure 6 In this case, circuit breakers are reused, which can save circuit breakers and thus save equipment costs.

[0061] In the above embodiment, the energy storage converter includes a main energy storage converter and a backup energy storage converter, and the junction box is also provided with a switching circuit breaker; the switching circuit breaker is respectively connected to the main energy storage converter, the backup energy storage converter and the electrical equipment; when the main energy storage converter fails, the switching circuit breaker cuts off the connection between the main energy storage converter and the electrical equipment, and connects the backup energy storage converter to the electrical equipment. In the technical solution of the embodiment of the present application, a switching circuit breaker is provided, and in the case of a failure of the main energy storage converter, the backup energy storage converter can be used to replace the main energy storage converter, thereby ensuring normal power supply to the electrical equipment.

[0062] According to some embodiments of the present application, referring to Figure 7 The combiner box 20 further includes an electrical equipment interface 205; the electrical equipment interface 205 is connected to the electrical equipment.

[0063] In the embodiment of the present application, the combiner box 20 is provided with an electric device interface 205 , and the electric device interface 205 is connected to the electric device. The DC power received by the DC busbar 201 is transmitted to the electric device through the electric device interface 205 .

[0064] In some embodiments, the power device interface 205 includes a positive power device interface and a negative power device interface, wherein the positive power device interface is connected to the positive DC bus of the power device, and the negative power device interface is connected to the negative DC bus of the power device.

[0065] It can be understood that the combiner box is provided with an electrical equipment interface to facilitate connection of the combiner box with the electrical equipment, thereby supplying power to the electrical equipment.

[0066] In some embodiments, the power-consuming device includes a plurality of power-consuming units; each power-consuming unit is connected to the DC busbar 201 via the power-consuming device interface 205 .

[0067] The power-consuming equipment may include multiple power-consuming units. For example, the power-consuming equipment is a capacity machine, which may include multiple storage locations, each of which may hold multiple battery cells. For example, a capacity machine of model A has 20 storage locations, each of which may hold 24 battery cells; a capacity machine of model B has 20 storage locations, each of which may hold 36 battery cells.

[0068] Optionally, the combiner box 20 is provided with an electric device interface 205, and the electric device interface 205 is respectively connected to a plurality of electric units. For example, the electric device interface 205 is respectively connected to 20 storage locations of the capacity machine.

[0069] Optionally, the combiner box 20 is provided with a plurality of power consumption equipment interfaces 205, and each power consumption equipment interface 205 is connected to a plurality of power consumption units respectively. Figure 8 The combiner box 20 is provided with 5 pairs of power equipment interfaces 205, and each pair of power equipment interfaces 205 is connected to 5 storage locations in the capacity machine. Each pair of power equipment interfaces includes a positive power equipment interface and a negative power equipment interface, and a switch is provided at the negative power equipment interface, which can disconnect the connection between the negative power equipment interface and the power unit.

[0070] Optionally, the depot can convert high voltage DC to low voltage DC, with a maximum power of 24kw and a charging current of 200A.

[0071] It should be noted that the number of power units, the number of power device interfaces, and the connection relationship between the power device interfaces and the power units are not limited to the above description and can be set according to actual conditions.

[0072] In the above embodiment, the electrical equipment includes a plurality of electrical units; the electrical equipment interface is connected to each electrical unit respectively to facilitate supplying power to each electrical unit.

[0073] According to some embodiments of the present application, the power adaptation coefficient between the energy storage converter 10 and the electrical equipment is within 0.3-0.7.

[0074] In the embodiment of the present application, the energy storage converter 10 can be configured according to the power consumption of the electrical equipment and the power adaptation coefficient, or the output power of the energy storage converter 10 can be configured.

[0075] Optionally, the power adaptation coefficient between the energy storage converter 10 and the electrical equipment is set to 0.6, and actually reaches 0.3.

[0076] In the technical solution of the embodiment of the present application, the power adaptation coefficient between the energy storage converter and the electrical equipment is within 0.3-0.7, which can better supply power to the electrical equipment.

[0077] According to some embodiments of the present application, the electrical equipment includes at least one of a capacity machine and a formation machine.

[0078] In the embodiment of the present application, the electrical equipment in the battery cell production line may include a capacity machine, which can perform charging and discharging tests on the battery cells, and a formation machine which can perform formation treatment on the batteries.

[0079] In the technical solution of the embodiment of the present application, the power supply equipment can supply power to a variety of electrical equipment and is suitable for a variety of application scenarios.

[0080] According to some embodiments of the present application, the electrical equipment includes a capacity dividing cabinet; the capacity dividing cabinet is connected to a DC busbar 201 in a combiner box 20 of a power supply system of a plant building.

[0081] Among them, the capacity cabinet can set the charging voltage, discharge voltage, charging current, discharge current, charging power and discharge power of the battery cell. The capacity cabinet can collect various data of the battery cell during the charging and discharging process according to the above-set charging parameters and discharge parameters and the preset frequency. After the battery cell is charged and discharged, the capacity cabinet can also set standards to screen the battery cells according to the battery cell capacity performance such as the accumulated data, charging curve and discharge curve.

[0082] In an embodiment of the present application, the electrical equipment includes a capacity distribution cabinet, which is connected to the DC busbar 201 in the junction box 20, and a battery cell can be arranged in the capacity distribution cabinet. The capacity distribution cabinet can be a capacity machine. When the battery cell is charged and tested, the capacity distribution cabinet can convert the 700V DC output of the DC busbar 201 into a low voltage and transmit the low voltage to the battery cell. The capacity distribution cabinet charges the battery cell according to the set charging voltage, charging current or charging power. In addition, the capacity distribution cabinet collects data such as voltage, current, capacity, energy, internal resistance, temperature, etc. during the charging process of the battery cell at a preset frequency. When the battery cell is discharged and tested, the capacity distribution cabinet can discharge the battery cell according to the set discharge voltage, discharge current or discharge power. In addition, the capacity distribution cabinet collects data such as voltage, current, capacity, energy, internal resistance, temperature, etc. during the discharge process of the battery cell at a preset frequency.

[0083] After the battery cells are charged and discharged, the capacity classification cabinet determines the data accumulation value, charging curve and discharging curve according to the voltage, current, capacity, energy, internal resistance, temperature, etc., and then sets the standards to select the battery cells according to the data accumulation value, charging curve and discharging curve.

[0084] Optionally, the DC busbar 201 and the capacity distribution cabinet can be connected by two connecting wires; the connecting wire can be a cross-sectional area of ​​240mm 2 of soft copper wire.

[0085] In the above embodiment, the electrical equipment includes a capacity dividing cabinet; the capacity dividing cabinet is connected to the DC busbar in the junction box of the power supply system of the plant. In the technical solution of the embodiment of the present application, the capacity dividing cabinet can be used to set the charging parameters and discharging parameters of the battery cell, and the charging data and discharging data of the battery cell can be collected, and the data can be statistically processed to select the battery cell, so as to better assist battery manufacturing and improve battery quality.

[0086] According to some embodiments of the present application, referring to Fig. 9The capacity distribution cabinet 30 is provided with a control chip 301 and a battery cell 302; the control chip 301 is used to receive a feedback signal from the battery cell 302, and control the charging and discharging process and the charging and discharging current according to the feedback signal.

[0087] In the embodiment of the present application, the capacity distribution cabinet 30 is provided with a control chip 301 and a battery cell 302, and the control chip 301 is connected to the battery cell 302. The control chip 301 can receive a feedback signal from the battery cell 302, control the charging process and the discharging process of the battery cell 302 according to the feedback signal, and control the magnitude of the charging current during the charging process, and control the magnitude of the discharging current during the discharging process.

[0088] Optionally, the control chip 301 is a digital signal processing (DSP) chip.

[0089] In the above embodiment, a control chip and a battery cell are provided in the capacity distribution cabinet; the control chip receives the feedback signal of the battery cell and controls the charging and discharging process and the charging and discharging current according to the feedback signal. In the technical solution of the embodiment of the present application, the control chip can well control the charging and discharging of the battery cell, thereby efficiently performing the battery cell test and improving the efficiency of battery production.

[0090] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-described embodiments only express several implementation methods of the present application, which is convenient for understanding the technical solutions of the present application in detail, but cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the protection scope of the attached claims described in the present application. Therefore, the protection scope of the patent of this application shall be based on the contents of the attached claims, and the description and drawings can be used to explain the contents of the claims.

Claims

1. A power supply system for a factory building, characterized in that: The power supply system of the plant includes an energy storage converter and a combiner box; a DC busbar is arranged in the combiner box, the energy storage converter is connected to the DC busbar, and the DC busbar is also connected to the power-consuming equipment; The energy storage converter is used to convert the AC power input from the external AC power supply into DC power; The DC busbar is used to transmit the DC power to the power-consuming device, receive the discharge energy of the power-consuming device and return the discharge energy to the power-consuming device.

2. The power supply system for a factory building according to claim 1, characterized in that: A DC circuit breaker is also provided in the combiner box; the DC circuit breaker is connected between the energy storage converter and the DC busbar.

3. The power supply system for a factory building according to claim 1, characterized in that: The combiner box is also provided with an electric equipment circuit breaker, and the electric equipment circuit breaker is connected between the DC busbar and the electric equipment.

4. The power supply system for a factory building according to any one of claims 1 to 3, characterized in that: The energy storage converter includes a main energy storage converter and a backup energy storage converter, and the combiner box is also provided with a switching circuit breaker; the switching circuit breaker is respectively connected to the main energy storage converter, the backup energy storage converter and the electrical equipment; The switching circuit breaker is used to cut off the connection between the main energy storage converter and the electric device when the main energy storage converter fails, and to connect the backup energy storage converter to the electric device.

5. The power supply system for a factory building according to claim 4, characterized in that: The main energy storage converter, the combiner box and the power-consuming equipment are all provided in plurality, and the standby energy storage converter is provided in one; Each of the main energy storage converters is connected to one of the electrical equipment via a switching circuit breaker in the corresponding combiner box; The backup energy storage converter is respectively connected to the plurality of electrical devices through the switching circuit breakers in the plurality of combiner boxes.

6. The power supply system for a factory building according to any one of claims 1 to 3, characterized in that: The combiner box also includes an electrical equipment interface; the electrical equipment interface is connected to the electrical equipment.

7. The power supply system for a factory building according to claim 6, characterized in that: The electrical equipment includes a plurality of electrical units; each of the electrical units is connected to the DC busbar via the electrical equipment interface.

8. The power supply system for a factory building according to any one of claims 1 to 3, characterized in that: The power adaptation coefficient between the energy storage converter and the electrical equipment is within 0.3-0.

7.

9. The power supply system for a factory building according to any one of claims 1 to 3, characterized in that: The electrical equipment includes at least one of a capacity machine and a formation machine.

10. The power supply system for a factory building according to any one of claims 1 to 3, characterized in that: The electrical equipment includes a capacity dividing cabinet, and the capacity dividing cabinet is connected to the DC busbar in the combiner box.

11. The power supply system for a factory building according to claim 10, characterized in that: The sub-capacity cabinet is provided with a control chip and a battery core; The control chip is used to receive the feedback signal of the battery cell and control the charging and discharging process and the charging and discharging current according to the feedback signal.

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