CN117792122A - Current conversion assembly, energy storage current transformer and energy storage system - Google Patents
Current conversion assembly, energy storage current transformer and energy storage system Download PDFInfo
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- CN117792122A CN117792122A CN202410200831.7A CN202410200831A CN117792122A CN 117792122 A CN117792122 A CN 117792122A CN 202410200831 A CN202410200831 A CN 202410200831A CN 117792122 A CN117792122 A CN 117792122A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 145
- 238000004146 energy storage Methods 0.000 title claims abstract description 47
- 239000003990 capacitor Substances 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims description 116
- 238000001816 cooling Methods 0.000 claims description 96
- 238000009413 insulation Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 239000000110 cooling liquid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a current transformation component, an energy storage current transformer and an energy storage system, wherein the current transformation component comprises: an electrical component mounting board; the alternating current-direct current conversion unit comprises an alternating current-direct current conversion unit body and a plurality of vertical capacitors, one ends of the vertical capacitors are connected with the electric component mounting plate, and the other ends of the vertical capacitors are electrically and mechanically connected with the alternating current-direct current conversion unit body; the alternating current-direct current conversion unit body, the plurality of vertical capacitors and the electric component mounting plate are sequentially arranged along the direction perpendicular to the electric component mounting plate. An energy storage converter, comprising a conversion assembly, further comprising: the battery control unit is used for being connected with the battery pack; the switching power supply is connected with the battery control unit, the three AC/DC conversion unit bodies which are mutually connected in parallel and the variable current control unit. The invention has the technical effects that the connection performance of the AC-DC conversion unit is good, and the dynamic adjustment of the capacity is convenient to realize.
Description
Technical Field
The invention relates to the technical field of energy storage systems, in particular to a variable flow assembly, an energy storage converter and an energy storage system.
Background
The energy storage converter (PCS) is a device for performing AC-DC conversion and controlling charge and discharge, and has the advantage of good AC-DC conversion performance.
Under the action of gravity, the AC-DC conversion unit and the related connecting parts of the energy storage converter are easy to loosen or even separate, so that the connection performance of the AC-DC conversion unit is poor, and the capacity dynamic adjustment performance of the related energy storage converter is poor.
Disclosure of Invention
Aiming at the technical problems, the invention provides a current transformation component, an energy storage current transformer and an energy storage system, which are convenient for ensuring good connection performance of an alternating current-direct current conversion unit and realizing dynamic adjustment of capacity.
In order to solve the problems, the technical scheme provided by the invention is as follows:
a deflector assembly comprising:
an electrical component mounting board;
the alternating current-direct current conversion unit comprises an alternating current-direct current conversion unit body and a plurality of vertical capacitors, one ends of the vertical capacitors are connected with the electric component mounting plate, and the other ends of the vertical capacitors are electrically and mechanically connected with the alternating current-direct current conversion unit body;
the alternating current-direct current conversion unit body, the plurality of vertical capacitors and the electric component mounting plate are sequentially arranged along the direction perpendicular to the electric component mounting plate.
Optionally, the method further comprises:
at least one connecting piece connected to one end of the vertical capacitor, and each connecting piece is provided with a threaded hole;
a first fastener threadedly coupled to both the threaded hole and the electrical component mounting plate;
the two bolt pieces are connected to the other end of the vertical capacitor, and the other end of the vertical capacitor and the alternating current-direct current conversion unit body are simultaneously electrically and mechanically connected through the two bolt pieces.
Optionally, the method further comprises:
a fixed rod;
two pins which are connected with one end of the fixed rod;
two second fasteners in threaded connection with the two pins correspondingly, wherein the two second fasteners are respectively connected with the adjacent alternating current-direct current conversion unit bodies;
the other end of the fixing rod is connected with the electric component mounting plate through bolts.
Optionally, the power supply further comprises three current converting control units, wherein the number of the three current converting units is three, the current converting unit bodies of the three current converting units are connected in parallel, the current converting control units are connected with the current converting unit bodies of the three current converting units, one ends of the three current converting unit bodies are used for being connected with a battery pack in series, and the other ends of the three current converting unit bodies respectively output three mutually independent alternating currents with 120-degree phase difference so as to enable one three-phase alternating current to be output.
Optionally, the device further comprises a conductive bar unit, the conductive bar unit is in a strip shape, and the conductive bar unit is sequentially connected with three ac/dc conversion unit bodies which are mutually connected in parallel, so that the three ac/dc conversion units are sequentially arranged, and the conductive bar unit comprises:
the first conductive bar is connected with three first conductive bosses, and the three first conductive bosses are correspondingly connected with the first direct current input ends of the three alternating current-direct current conversion unit bodies;
the second conductive bar is connected with the first conductive bar in an insulating way, three second conductive bosses are connected to the second conductive bar, and the three second conductive bosses are correspondingly connected with the second direct current input ends of the three alternating current-direct current conversion unit bodies;
the insulation device comprises a first insulation sleeve, an insulation sheet and a second insulation sleeve, wherein the first insulation sleeve, the first conductive bar, the insulation sheet, the second conductive bar and the second insulation sleeve are sequentially and insulatively connected.
Optionally, the first dc input end of the ac/dc conversion unit body is connected to the positive electrode of the battery pack through an insulated gate bipolar transistor and a dc contactor that are sequentially connected, and the second dc input end of the ac/dc conversion unit body is connected to the negative electrode of the battery pack through a first fuse, and the first ac output end of each ac/dc conversion unit body is connected to a second fuse.
An energy storage converter, comprising two conversion components, further comprising:
the battery control unit is used for being connected with the battery pack;
the switching power supply is connected with the battery control unit, the three AC/DC conversion unit bodies which are mutually connected in parallel and the variable current control unit.
Optionally, the device further comprises a liquid cooling assembly, the liquid cooling assembly comprises:
a liquid inlet pipe;
a liquid outlet pipe;
the liquid cooling device comprises a plurality of first liquid cooling plates and a plurality of second liquid cooling plates which are arranged in a staggered manner, wherein first inlets of the plurality of first liquid cooling plates are connected with the liquid inlet pipe, first outlets of the plurality of first liquid cooling plates are correspondingly connected with second inlets of the plurality of second liquid cooling plates, and second outlets of the plurality of second liquid cooling plates are connected with the liquid outlet pipe;
each alternating-current/direct-current conversion unit body is connected with the first liquid cooling plate or the second liquid cooling plate.
Optionally, the portable electric power generation device further comprises a box body, wherein the battery control unit, the electric component mounting plate and the variable current control unit are all connected in the box body.
Optionally, the method further comprises:
the battery positive electrode port is used for being connected with the positive electrode of the battery pack, and the battery negative electrode port is used for being connected with the negative electrode of the battery pack;
the battery control unit is connected with the battery pack through the communication port;
the variable-current interface is connected to one side of the box body and is connected with the variable-current control unit;
a drawing handle connected to one side of the case;
the first alternating current output interface and the second alternating current output interface are connected to the other side of the box body, and the first alternating current output interface and the second alternating current output interface are connected with the alternating current-direct current conversion unit body.
An energy storage system includes an energy storage converter.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1) Because one end of the three AC/DC conversion unit bodies is used for being connected in series with the battery pack, one battery pack comprises at least two battery packs, the at least two battery packs are convenient to control independently, the control pertinence is good, when one battery pack fails, the battery pack where the battery pack is located can not be charged or discharged, other battery packs of the energy storage converter can be charged or discharged normally, and the fault tolerance rate is high;
2) The number of the ac/dc conversion units of the energy storage converter is preferably six, and the number of the battery packs can be reduced according to the needs of customers, so that the capacity can be dynamically adjusted conveniently, for example, in the embodiment, four battery packs (eight battery packs) are arranged;
3) The first liquid cooling plate and the second liquid cooling plate in the liquid cooling pipeline system are connected in series and combined into one liquid cooling unit, and meanwhile, the liquid cooling units are connected in parallel, so that the liquid inlet amount and the liquid outlet amount of the liquid cooling units are consistent, the flow resistance of the cooling liquid is small, the heat dissipation efficiency is high, when one of the first liquid cooling plate or the second liquid cooling plate fails, only the liquid cooling unit where the first liquid cooling plate or the second liquid cooling plate is located cannot work, and other liquid cooling units can work, so that the fault tolerance of the liquid cooling pipeline system is high;
4) The AC/DC conversion unit is detachably connected with the box body, which is equivalent to the modular installation of the AC/DC conversion unit in the box body, so that the AC/DC conversion unit can be increased or decreased according to the requirement on the premise of not changing the external dimension of the box body, the purpose of saving the cost is achieved, and the problems of the layout and connection of the AC/DC conversion unit and the box body, such as vertical capacitor connection, sequential arrangement of six AC/DC conversion units and the like, are solved;
5) The vertical capacitor is connected between the AC/DC conversion unit body and the electric component mounting plate, and is sequentially arranged along the direction perpendicular to the electric component mounting plate, so that the vertical capacitor not only plays a role of the vertical capacitor (AC and DC blocking) but also plays a role of supporting the AC/DC conversion unit body, prevents the AC/DC conversion unit body from loosening or even falling off under the action of gravity, and ensures good connection performance of the AC/DC conversion unit body.
Drawings
Fig. 1 is a front view of an energy storage converter according to an embodiment of the present invention;
fig. 2 is a side view of an energy storage converter according to an embodiment of the present invention;
fig. 3 is a second side view of an energy storage converter according to an embodiment of the present invention;
fig. 4 is a circuit diagram of an energy storage converter according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a current transformer assembly according to an embodiment of the present invention;
fig. 6 is a second schematic structural diagram of a current transformer according to an embodiment of the present invention;
fig. 7 is a third schematic structural diagram of a current transformer according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a conductive bar unit according to an embodiment of the present invention;
FIG. 9 is a second schematic diagram of a conductive bar unit according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a liquid cooling assembly according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a second embodiment of a liquid cooling assembly according to the present invention;
FIG. 12 is a partial view of FIG. 7A;
in the figure: 1. a battery control unit; 2. a variable flow assembly; 21. an AC/DC conversion unit; 211. an AC/DC conversion unit body; 212. a vertical capacitor; 2121. a connecting sheet; 2122. a threaded hole; 2123. a bolt member; 213. a first dc input; 214. a second dc input; 215. a first ac output; 22. a variable current control unit; 23. a conductive bar unit; 231. a first conductive bar; 2311. a receiving hole; 232. a first conductive boss; 233. a second conductive bar; 234. a second conductive boss; 235. a first insulating sleeve; 2351. a first through hole; 236. an insulating sheet; 2361. a second through hole; 237. a second insulating sleeve; 238. a through hole; 24. an insulated gate bipolar transistor; 25. a DC contactor; 26. a first fuse; 27. a second fuse; 28. an electrical component mounting board; 29. a fixed rod; 291. pins; 292. a second fastener; 3. a switching power supply; 41. a first liquid cooling plate; 411. a first inlet; 412. a first outlet; 42. a second liquid cooling plate; 421. a second inlet; 422. a second outlet; 43. a liquid inlet pipe; 44. a liquid outlet pipe; 45. a liquid cooling unit; 5. a case; 51. a case body; 52. a cover plate; 53. sealing the waterproof pad; 54. mounting a fixed foot; 61. a battery positive electrode port; 62. a battery negative electrode port; 63. a communication port; 64. a variable current interface; 65. a pull handle; 66. a first ac output interface; 67. a second ac output interface; 7. a battery pack; 71. and a battery pack.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings. The first, second, etc. words are provided for convenience in describing the technical scheme of the present invention, and have no specific limitation, and are all generic terms, and do not constitute limitation to the technical scheme of the present invention. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. The technical schemes in the same embodiment and the technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is within the scope of the invention.
Examples
With reference to fig. 1-12, this embodiment provides a deflector assembly 2.
Referring to fig. 1-12, the present embodiment further provides an energy storage converter, including a battery control unit 1 and at least one current conversion assembly 2, where the current conversion assembly 2 includes:
an electrical component mounting board 28;
three ac/dc conversion units 21, each ac/dc conversion unit 21 includes an ac/dc conversion unit body 211 and a plurality of vertical capacitors 212, one ends of the plurality of vertical capacitors 212 are connected with the electrical component mounting board 28, the other ends of the plurality of vertical capacitors 212 are electrically connected with the ac/dc conversion unit body 211 while being mechanically connected, the three ac/dc conversion unit bodies 211 are connected in parallel with each other, and one ends of the three ac/dc conversion unit bodies 211 are connected in series with the battery pack 7;
the fixed rod 29, one end of the fixed rod 29 is connected with the adjacent alternating current-direct current conversion unit body 211, and the other end of the fixed rod 29 is connected with the electric component mounting plate 28;
a variable current control unit 22 electrically connected to the three ac/dc conversion unit bodies 211;
wherein the battery control unit 1 is adapted to be connected to a battery pack 7.
Specifically, a battery control unit 1 (BCU) is configured to control and protect all battery packs 7 connected to the energy storage converter; the current transformation assembly 2 includes three ac/dc conversion units 21 (MCU) and a current transformation control unit 22 (SCU), where the three ac/dc conversion units 21 are used to convert the dc power from the battery packs 7 into three single-phase ac power that are independent of each other, and the phase difference between the three single-phase ac power that are independent of each other is 120 °, so as to form a three-phase ac power finally, and the current transformation control unit 22 is used to control the voltage and the potential of the single-phase ac power output by each ac/dc conversion unit 21, where the number of current transformation assemblies 2 is at least one, preferably two, in other words, the number of ac/dc conversion units 21 of the energy storage current transformer is preferably six, and one battery pack 7 includes at least two battery packs 71, and the number of battery packs 71 of each battery pack 7 is preferably two, so that the energy storage current transformer can perform ac/dc conversion on the six battery packs 7 (twelve battery packs 71) at the same time, and of course, so as to facilitate dynamic adjustment of capacity, such as in this embodiment, four battery packs 7 (eight battery packs 71) according to the needs of customers; because the three alternating current-direct current conversion unit bodies 211 in each conversion assembly 2 are mutually connected in parallel, and the two conversion assemblies 2 are mutually independent, the energy storage converter is convenient to adapt to the requirement of dynamic capacity increase and decrease in the energy storage market, and meanwhile, the power of the alternating current-direct current conversion unit bodies 211 is convenient to improve; because one end of the three ac/dc conversion unit bodies 211 is connected in series with the battery packs 7, one battery pack 7 comprises at least two battery packs 71, so that the at least two battery packs 71 can be controlled independently, the control pertinence is good, when one of the battery packs 71 fails, the battery pack 7 where the battery pack 71 is located can not be charged or discharged, and other battery packs 7 of the energy storage converter can be charged or discharged normally, so that the fault tolerance is high;
it will be appreciated that the AC-DC conversion unit 21 is DC/AC in fig. 4, and the vertical capacitor 212 is part of the DC/AC, i.e. the vertical capacitor 212 is part of the AC-DC conversion unit 21. For convenience of description of the present invention, each ac/dc conversion unit 21 is divided into an ac/dc conversion unit body 211 and three vertical capacitors 212.
Further, the ac/dc conversion unit body 211, the plurality of vertical capacitors 212, and the electric component mounting board 28 are disposed in this order in a direction perpendicular to the electric component mounting board 28, that is, in a vertical direction as shown in fig. 6 and 7.
Further, as shown in fig. 5-7, the method further includes:
at least one connecting piece 2121 connected to one end of the vertical capacitor 212, and a threaded hole 2122 is formed in each connecting piece 2121;
a first fastener screwed with both the screw hole 2122 and the electrical component mounting plate 28;
two bolts 2123 connected to the other end of the vertical capacitor 212, and the other end of the vertical capacitor 212 and the ac/dc conversion unit body 211 are electrically and mechanically connected at the same time by the two bolts 2123.
Specifically, at least one connecting piece 2121 is reserved at the edge position of one end of the three vertical capacitors 212, a threaded hole 2122 is formed in the connecting piece 2121, and meanwhile, detachable connection between one end of the three vertical capacitors 212 and the electric component mounting plate 28 is achieved through a first fastener, wherein the first fastener can be a bolt, a screw and the like; the other ends of the three vertical capacitors 212 are electrically and mechanically connected with the ac/dc conversion unit body 211 through two screw members 2123 to prevent the ac/dc conversion unit body 211 from moving or tilting, wherein the three vertical capacitors 212 are part of the ac/dc conversion unit 21; it should be noted that the other five ac/dc conversion units 21 of the energy storage converter are also fixed in this way.
Further, as shown in fig. 5 to 7 and 12, the method further includes:
two pins 291 each connected to one end of the fixing lever 29;
two second fasteners 292 corresponding to the two pins 291 are screwed, and the two second fasteners 292 are connected to the adjacent ac/dc conversion unit body 211, respectively.
Specifically, as shown in fig. 5 to 7, three ac/dc conversion unit bodies 211 of one current converting assembly 2 connected in parallel with each other are connected by a fixing rod 29, and the fixing rod 29 is connected with an electrical component mounting board 28; the fixing rod 29 is further fixed to the ac/dc conversion unit body 211 through a second fastening member 292, where the second fastening member 292 may be connected to only the ac/dc conversion unit body 211, or may be fastened to the ac/dc conversion unit body 211 to further fix the first liquid cooling plate 41 or the second liquid cooling plate 42, and the first liquid cooling plate 41 or the second liquid cooling plate 42 and the ac/dc conversion unit body 211 are further fixed by a plurality of other fastening members;
as shown in fig. 12, the fixing bars 29 respectively fix the edge positions of the long sides of the adjacent ac/dc conversion unit bodies 211 through two pins 291, two fixing bars 29 are shared between the two adjacent ac/dc conversion unit bodies 211, that is, three ac/dc conversion unit bodies 211 in a group of three share four fixing bars 29, in order, the edge of the first ac/dc conversion unit body 211 and the edge of the last ac/dc conversion unit body 211 are not provided with a fixing bar 29, and the fixing bar 29 may be provided between the third ac/dc conversion unit body 211 and the fourth ac/dc conversion unit body 211, or the fixing bar 29 may not be provided (as shown in fig. 1); meanwhile, the adjacent AC/DC conversion units 21 of one converter assembly 2 are connected with the electric component mounting plate 28, and the electric component mounting plate 28 is connected with the box 5, so that the gravity generated by the downward AC/DC conversion units 21 due to the vertical installation of the energy storage converter can be overcome conveniently.
Further, as shown in fig. 8 and 9, the current transforming assembly 2 further includes a conductive bar unit 23, and the conductive bar unit 23 includes:
the first conductive row 231, three first conductive bosses 232 are connected to the first conductive row 231, and the three first conductive bosses 232 are correspondingly connected with the first direct current input ends 213 of the three alternating current-direct current conversion units 21;
the second conductive bar 233 is connected to the first conductive bar 231 in an insulating manner, three second conductive bosses 234 are connected to the second conductive bar 233, and the three second conductive bosses 234 are correspondingly connected to the second dc input ends 214 of the three ac/dc conversion units 21.
Specifically, as the number of the current transformation components 2 is preferably two, the number of the conductive bar units 23 is also preferably two, and the conductive bar units 23 are convenient for solving the problems of oversized lead installation and inconvenient installation; the first conductive bars 231 are used for carrying three first conductive bosses 232, the three first conductive bosses 232 are used for enabling the first dc input ends 213 of the three ac-dc conversion units 21 to be connected in parallel, the number of the first conductive bosses 232 is equal to that of the ac-dc conversion units 21, preferably three, and the energy storage converter is preferably provided with six first conductive bosses 232 because the converter component 2 is preferably two, wherein the connection mode between the first conductive bars 231 and the three first conductive bosses 232 is preferably integrated connection, and the materials of the first conductive bars 231 and the three first conductive bosses 232 can be copper, aluminum and the like, preferably copper; the second conductive bars 233 are used for carrying three second conductive bosses 234, the three second conductive bosses 234 are used for enabling the second dc input ends 214 of the three ac-dc conversion units 21 to be connected in parallel, the number of the second conductive bosses 234 is equal to that of the ac-dc conversion units 21, preferably three, and the energy storage converter is preferably provided with six second conductive bosses 234 because the converter component 2 is preferably two, wherein the connection mode between the second conductive bars 233 and the three second conductive bosses 234 is preferably integrated connection, and the materials of the second conductive bars 233 and the three second conductive bosses 234 can be copper, aluminum and the like, preferably copper; it should be noted that, in order to facilitate accommodation of the second conductive boss 234, the first conductive row 231 is provided with an accommodation hole 2311.
Further, as shown in fig. 8 and 9, the conductive bar unit 23 further includes a first insulating sleeve 235, an insulating sheet 236, and a second insulating sleeve 237, and the first insulating sleeve 235, the first conductive bar 231, the insulating sheet 236, the second conductive bar 233, and the second insulating sleeve 237 are sequentially connected in an insulating manner.
Specifically, the first insulating sleeve 235, the insulating sheet 236 and the second insulating sleeve 237 are used for being matched to realize insulating connection between the first conductive row 231 and the second conductive row 233, the first insulating sleeve 235 is provided with a first through hole 2351 for accommodating the first conductive boss 232 and the second conductive boss 234, the insulating sheet 236 is provided with a second through hole 2361 for accommodating the second conductive boss 234, wherein the materials of the first insulating sleeve 235 and the second insulating sleeve 237 are preferably PVC, and the material of the insulating sheet 236 is preferably PET; meanwhile, in order to facilitate the installation of the conductive bar unit 23 on the ac-dc conversion unit 21 by the fastener, through holes 238 for accommodating the fastener are provided on the first conductive boss 232, the insulating sheet 236, the second conductive bar 233, the second insulating sleeve 237 and the second conductive boss 234, and the accommodating holes 2311, the first through holes 2351 and the second through holes 2361 also serve as the through holes 238 for accommodating the fastener.
Further, as shown in fig. 4, the first dc input terminal 213 of the ac/dc conversion unit 21 is connected to the positive electrode of the battery 7 through the insulated gate bipolar transistor 24 and the dc contactor 25 which are sequentially connected, the second dc input terminal 214 of the ac/dc conversion unit 21 is connected to the negative electrode of the battery 7 through the first fuse 26, and the first ac output terminal 215 of each ac/dc conversion unit 21 is connected to the second fuse 27.
Specifically, an insulated gate bipolar transistor 24 (IGBT) is used as an amplifier; the direct current contactor 25 is equivalent to a switch and is used for controlling the on-off of the battery pack 7; the first fuse 26 is for preventing dc overload of the battery pack 7; the second fuse 27 is for preventing overload of the output ac power; the number of the insulated gate bipolar transistor 24, the dc contactor 25, the first fuse 26, and the second fuse 27 is preferably four; the insulated gate bipolar transistor 24 and the dc contactor 25 are both positioned on the positive dc line, the first fuse 26 is positioned on the negative dc line, and the present invention preferably has four positive dc lines and four negative dc lines.
Further, as shown in fig. 1, the power supply further comprises a switching power supply 3, the battery control unit 1, three parallel ac/dc conversion unit bodies 211 and the current conversion control unit 22 are all connected.
Specifically, the switching power supply 3 is configured to supply electric energy to the battery control unit 1, the three ac/dc conversion unit bodies 211 connected in parallel with each other, and the variable current control unit 22.
Further, as shown in fig. 1, 10 and 11, the liquid cooling device further includes a liquid cooling assembly, including:
a liquid inlet pipe 43;
a liquid outlet pipe 44;
the first inlets 411 of the first liquid cooling plates 41 are connected with the liquid inlet pipes 43, the first outlets 412 of the first liquid cooling plates 41 are correspondingly connected with the second inlets 421 of the second liquid cooling plates 42, and the second outlets 422 of the second liquid cooling plates 42 are connected with the liquid outlet pipes 44;
wherein each ac/dc conversion unit body 211 is connected to the first liquid cooling plate 41 or the second liquid cooling plate 42.
Specifically, in operation, first, the cooling liquid flows into the plurality of first liquid cooling plates 41 from the liquid inlet pipe 43 and the first inlets 411 of the plurality of first liquid cooling plates 41 in sequence; then, the cooling liquid flows through a plurality of first liquid cooling plates 41; then, the cooling liquid flows out of the plurality of first liquid-cooling plates 41 from the first outlets 412 of the plurality of first liquid-cooling plates 41, and flows into the plurality of second liquid-cooling plates 42 from the second inlets 421 of the plurality of second liquid-cooling plates 42; further, the cooling liquid flows through a plurality of second liquid cooling plates 42; finally, the cooling liquid flows out of the plurality of second liquid cooling plates 42 from the second outlets 422 of the plurality of second liquid cooling plates 42 and flows out of the liquid outlet pipe 44; in summary, a first liquid cooling plate 41 and a second liquid cooling plate 42 in the liquid cooling pipeline system are connected in series and combined into a liquid cooling unit 45, meanwhile, a plurality of liquid cooling units 45 are connected in parallel, so that the liquid inlet amount and the liquid outlet amount of the liquid cooling units 45 are consistent, the flow resistance of the cooling liquid is small, the heat dissipation efficiency is high, when one of the first liquid cooling plate 41 or the second liquid cooling plate 42 fails, only the liquid cooling unit 45 where the first liquid cooling plate 41 or the second liquid cooling plate 42 is located cannot work, and other liquid cooling units 45 can work, so that the fault tolerance of the liquid cooling pipeline system is high;
the first liquid cooling plates 41 and the second liquid cooling plates 42 are staggered, specifically, one first liquid cooling plate 41, one second liquid cooling plate 42, one first liquid cooling plate 41 and the like are staggered and circularly arranged, and the number of the first liquid cooling plates 41 and the number of the second liquid cooling plates 42 are required to be ensured to be equal, wherein, the number of the alternating current-direct current conversion unit bodies 211 of the energy storage converter is preferably six, so that the alternating current-direct current conversion unit bodies 211 and the first liquid cooling plates 41 or the second liquid cooling plates 42 are in one-to-one correspondence, the number of the first liquid cooling plates 41 and the number of the second liquid cooling plates 42 is preferably three, and the number of the corresponding liquid cooling units 45 is also preferably three.
Further, as shown in fig. 1, the battery control unit 1, the electric component mounting plate 28 and the variable current control unit 22 are all connected in the case 5.
Specifically, the box 5 is used for accommodating the battery control unit 1, the electric component mounting plate 28 and the variable flow control unit 22, so as to play an effective role in protection, wherein the box 5 specifically comprises a box body 51 and a cover plate 52 which are detachably connected with each other, and a sealing waterproof pad 53 is arranged between the box body 51 and the cover plate 52; preferably, the electric component mounting plate 28 is detachably connected with the box body 5, and the ac/dc conversion unit 21 and the electric component mounting plate 28 are detachably connected, which is equivalent to that the ac/dc conversion unit 21 is modularly arranged in the box body 5, so that the ac/dc conversion unit 21 can be increased or decreased according to the requirement on the premise of not changing the external dimension of the box body 5, thereby achieving the purpose of saving cost; the battery control unit 1 is preferably mounted at the inner top end of the case 5; six AC/DC conversion units 21 are sequentially arranged in the box body 5 along the gravity direction, wherein the three AC/DC conversion units 21 at the upper part of the box body 5 are mutually connected in parallel, and the three AC/DC conversion units 21 at the lower part of the box body 5 are mutually connected in parallel; the two current-converting control units 22 are respectively and correspondingly arranged on one side of the three alternating current-direct current conversion units 21 at the upper part of the box body 5 and one side of the three alternating current-direct current conversion units 21 at the lower part of the box body 5;
two conducting bar units 23 are also positioned inside the box body 5, one conducting bar unit 23 is positioned at the upper part of the box body 5, and the other conducting bar unit 23 is positioned at the lower part of the box body 5; each conducting bar unit 23 is used as a direct current end bus, each conducting bar unit 23 is connected with three alternating current-direct current conversion units 21 in parallel, and each alternating current-direct current conversion unit 21 is a PCB integrated with various components and parts for realizing DC/AC single-phase conversion, and has the main functions of realizing direct current input and outputting single-phase alternating current, and controlling the voltage and the phase of the output single-phase alternating current through a current transformation control unit 22. The insulated gate bipolar transistor 24, the direct current contactor 25, the first fuse 26 and the second fuse 27 are also installed inside the case 5; the switching power supply 3 is also arranged inside the box body 5, preferably at the top end inside the box body 5; the liquid inlet pipe 43, the liquid outlet pipe 44, the three first liquid cooling plates 41 and the three second liquid cooling plates 42 are also arranged inside the box body 5, and meanwhile, the liquid inlet pipe 43 and the liquid outlet pipe 44 extend to the outside of one side of the box body 5;
it should be noted that, in order to meet the structural installation requirement of the energy storage integrated machine, two sides of the bottom end outside the box body 5 are respectively connected with two installation fixing pins 54, so that the energy storage converter is convenient to realize vertical installation; the ac/dc conversion unit 21 includes an ac/dc conversion unit body 211 and a vertical capacitor 212 that are connected to each other, since each ac/dc conversion unit 21 adopts the first liquid cooling plate 41 or the second liquid cooling plate 42 to perform liquid cooling heat dissipation, resulting in a larger volume and a larger weight, when the ac/dc conversion unit 21 is fixed, the electric component mounting board 28 is first fixed on the box 5, then the vertical capacitor 212 is fixed on the electric component mounting board 28, and finally the first liquid cooling plate 41 or the second liquid cooling plate 42, and the ac/dc conversion unit body 211 are connected to the vertical capacitor 212, so that the vertical capacitor 212 not only performs the function of the vertical capacitor 212 (through ac and dc resistance), but also performs the function of supporting the first liquid cooling plate 41 or the second liquid cooling plate 42, and simultaneously performs the function of supporting the ac/dc conversion unit body 211.
Further, as shown in fig. 2 and 3, the method further includes:
a battery positive electrode port 61 and a battery negative electrode port 62 connected to one side of the case 5, the battery positive electrode port 61 being for connection with the positive electrode of the battery pack 7, the battery negative electrode port 62 being for connection with the negative electrode of the battery pack 7;
a communication port 63 connected to one side of the case 5, and the battery control unit 1 is connected to the battery pack 7 through the communication port 63;
a variable current interface 64 connected to one side of the case 5, the variable current interface 64 being connected to the variable current control unit 22;
a drawing handle 65 connected to one side of the case 5;
the first ac output interface 66 and the second ac output interface 67 connected to the other side of the case 5, and the first ac output interface 66 and the second ac output interface 67 are connected to the ac-dc conversion unit 21.
Specifically, the battery positive electrode ports 61 and the battery negative electrode ports 62 are used for realizing the plugging of the battery packs 7 (at least two battery packs 71), the number of the battery positive electrode ports 61 and the number of the battery negative electrode ports 62 are equal to the number of the battery packs 7, and in the embodiment, the number of the battery packs 7 is four, so that the number of the battery positive electrode ports 61 and the number of the battery negative electrode ports 62 are four; the communication ports 63 are used for realizing communication connection between the battery control unit 1 and the battery packs 7, so that the battery control unit 1 can conveniently control and protect all the battery packs 7 connected with the energy storage converter, the number of the communication ports 63 is preferably two, and the fault tolerance rate is high; the variable current interfaces 64 are convenient for outputting control signals from the variable current control units 22 to terminals, the number of the variable current interfaces 64 is preferably two, and the two variable current interfaces 64 are correspondingly connected with the two variable current control units 22; the drawing handle 65 facilitates drawing the box 5; the number of the first ac output interfaces 66 and the second ac output interfaces 67 is equal to the number of the ac-dc conversion units 21, and six are preferable.
With reference to fig. 1-12, this embodiment further provides an energy storage system, including an energy storage converter.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.
Claims (11)
1. A deflector assembly, comprising:
an electrical component mounting board;
the alternating current-direct current conversion unit comprises an alternating current-direct current conversion unit body and a plurality of vertical capacitors, one ends of the vertical capacitors are connected with the electric component mounting plate, and the other ends of the vertical capacitors are electrically and mechanically connected with the alternating current-direct current conversion unit body;
the alternating current-direct current conversion unit body, the plurality of vertical capacitors and the electric component mounting plate are sequentially arranged along the direction perpendicular to the electric component mounting plate.
2. The deflector assembly of claim 1, further comprising:
at least one connecting piece connected to one end of the vertical capacitor, and each connecting piece is provided with a threaded hole;
a first fastener threadedly coupled to both the threaded hole and the electrical component mounting plate;
the two bolt pieces are connected to the other end of the vertical capacitor, and the other end of the vertical capacitor and the alternating current-direct current conversion unit body are simultaneously electrically and mechanically connected through the two bolt pieces.
3. The deflector assembly of claim 1, further comprising:
a fixed rod;
two pins which are connected with one end of the fixed rod;
two second fasteners in threaded connection with the two pins correspondingly, wherein the two second fasteners are respectively connected with the adjacent alternating current-direct current conversion unit bodies;
the other end of the fixing rod is connected with the electric component mounting plate through bolts.
4. A converter assembly according to any one of claims 1 to 3, further comprising a converter control unit, wherein the number of the ac/dc conversion units is three, the ac/dc conversion unit bodies of the three ac/dc conversion units are connected in parallel, the converter control unit is connected to the ac/dc conversion unit bodies of the three ac/dc conversion units, one ends of the three ac/dc conversion unit bodies are connected in series with the battery pack, and the other ends of the three ac/dc conversion unit bodies output three mutually independent ac currents with a phase difference of 120 ° respectively, so as to output a three-phase ac current.
5. The current transformer assembly of claim 4, further comprising a conductive bar unit, wherein the conductive bar unit is elongated, and the conductive bar unit is sequentially connected to three ac-dc conversion unit bodies connected in parallel to each other, so that the three ac-dc conversion units are sequentially arranged, and the conductive bar unit comprises:
the first conductive bar is connected with three first conductive bosses, and the three first conductive bosses are correspondingly connected with the first direct current input ends of the three alternating current-direct current conversion unit bodies;
the second conductive bar is connected with the first conductive bar in an insulating way, three second conductive bosses are connected to the second conductive bar, and the three second conductive bosses are correspondingly connected with the second direct current input ends of the three alternating current-direct current conversion unit bodies;
the insulation device comprises a first insulation sleeve, an insulation sheet and a second insulation sleeve, wherein the first insulation sleeve, the first conductive bar, the insulation sheet, the second conductive bar and the second insulation sleeve are sequentially and insulatively connected.
6. A converter assembly according to any of claims 1-3, wherein a first dc input of the ac-dc converter unit body is connected to a positive pole of the battery through an insulated gate bipolar transistor and a dc contactor connected in sequence, and a second dc input of the ac-dc converter unit body is connected to a negative pole of the battery through a first fuse, and a second fuse is connected to a first ac output of each ac-dc converter unit body.
7. An energy storage converter comprising two of the current converting assemblies of any of claims 4-6, further comprising:
the battery control unit is used for being connected with the battery pack;
the switching power supply is connected with the battery control unit, the three AC/DC conversion unit bodies which are mutually connected in parallel and the variable current control unit.
8. The energy storage converter of claim 7, further comprising a liquid cooling assembly, the liquid cooling assembly comprising:
a liquid inlet pipe;
a liquid outlet pipe;
the liquid cooling device comprises a plurality of first liquid cooling plates and a plurality of second liquid cooling plates which are arranged in a staggered manner, wherein first inlets of the plurality of first liquid cooling plates are connected with the liquid inlet pipe, first outlets of the plurality of first liquid cooling plates are correspondingly connected with second inlets of the plurality of second liquid cooling plates, and second outlets of the plurality of second liquid cooling plates are connected with the liquid outlet pipe;
each alternating-current/direct-current conversion unit body is connected with the first liquid cooling plate or the second liquid cooling plate.
9. The energy storage converter of claim 7, further comprising a housing, wherein the battery control unit, the electrical component mounting plate, and the conversion control unit are all connected within the housing.
10. An energy storage converter according to claim 9, further comprising:
the battery positive electrode port is used for being connected with the positive electrode of the battery pack, and the battery negative electrode port is used for being connected with the negative electrode of the battery pack;
the battery control unit is connected with the battery pack through the communication port;
the variable-current interface is connected to one side of the box body and is connected with the variable-current control unit;
a drawing handle connected to one side of the case;
the first alternating current output interface and the second alternating current output interface are connected to the other side of the box body, and the first alternating current output interface and the second alternating current output interface are connected with the alternating current-direct current conversion unit body.
11. An energy storage system comprising an energy storage converter according to any one of claims 7-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410200831.7A CN117792122A (en) | 2024-02-23 | 2024-02-23 | Current conversion assembly, energy storage current transformer and energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410200831.7A CN117792122A (en) | 2024-02-23 | 2024-02-23 | Current conversion assembly, energy storage current transformer and energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117792122A true CN117792122A (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410200831.7A Pending CN117792122A (en) | 2024-02-23 | 2024-02-23 | Current conversion assembly, energy storage current transformer and energy storage system |
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| Country | Link |
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| CN (1) | CN117792122A (en) |
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