CN210985698U - Online charging device for lithium battery - Google Patents
Online charging device for lithium battery Download PDFInfo
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- CN210985698U CN210985698U CN201922262705.1U CN201922262705U CN210985698U CN 210985698 U CN210985698 U CN 210985698U CN 201922262705 U CN201922262705 U CN 201922262705U CN 210985698 U CN210985698 U CN 210985698U
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- power supply
- lithium battery
- lithium cell
- charging device
- lithium
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 107
- 238000004891 communication Methods 0.000 claims abstract description 26
- 238000002955 isolation Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an online charging device of lithium cell adopts each rectification power supply in the series connection rectification power supply group to charge respectively each lithium cell in the series connection lithium cell group, has guaranteed that every lithium cell can both realize independent charge management, ensures that every lithium cell can both be full of the electricity, has realized the equilibrium of each lithium cell electric quantity. And simultaneously, the positive output end is all connected to the positive pole of series lithium cell group and rectification power supply group, the negative output end is all connected to the negative pole of series lithium cell group and rectification power supply group, need not to break off the series connection relation of each lithium cell in the lithium cell group during charging, has ensured that the lithium cell group keeps the state of being prepared for electricity when charging, can satisfy the high requirement of communication field to online standby electricity.
Description
Technical Field
The utility model relates to a battery charging technology, concretely relates to online charging device of lithium cell.
Background
The high dc voltage obtained with lithium batteries is generally achieved by connecting lithium batteries in series. The charging of series lithium battery group is a difficult problem, if the series lithium battery group is directly charged by a high-voltage power supply, the unbalance of the voltage and the electric quantity of each lithium battery can be possibly caused, and even the out-of-control risk can occur. For this reason, the conventional solutions are: or increasing BMS group management of the series lithium battery pack on the basis of the battery BMS, such as application in the energy storage industry; or the charging and the discharging are carried out separately, the discharging is carried out in series, the series connection relation of the batteries is disconnected during the charging, and then the grouping charging is carried out on each lithium battery, for example, some new energy automobiles.
However, such a charging method for the series lithium battery pack is not well suited for the communication field.
The following two reasons mainly exist:
1. in communication applications, the battery is in an online (charging while maintaining a standby state) standby state, and the series physical connection of the lithium battery pack cannot be disconnected during charging.
2. For the communication of 48V (rated reference voltage) lithium battery series, a BMS group management system is required to manage the charging of the battery pack, which not only increases the complexity and cost of the communication standby power system, but also reduces the reliability of power supply.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an online charging device of lithium cell to solve the current series connection relation that need break off the battery when charging to the charge mode of series lithium cell group, then just carry out the problem of grouping the charging to each lithium cell.
The utility model discloses a realize through following technical scheme:
an online charging device for lithium batteries is used for charging a series lithium battery pack, the series lithium battery pack comprises a plurality of lithium batteries which are sequentially connected in series, the charging device comprises a rectifying power supply pack, the rectifying power supply pack comprises a plurality of rectifying power supplies which are sequentially connected in series, each rectifying power supply corresponds to each lithium battery one by one, and each rectifying power supply is connected with each corresponding lithium battery to charge each corresponding lithium battery;
the positive electrode of the series lithium battery pack is connected with the positive output end, and the negative electrode of the series lithium battery pack is connected with the negative output end;
the positive pole of the rectification power supply group is connected with the positive output end, and the negative pole of the rectification power supply group is connected with the negative output end.
Furthermore, the charging device further comprises a rectification power supply management unit, wherein the rectification power supply management unit is connected with each rectification power supply and is used for monitoring the working state of each rectification power supply and setting parameters of each rectification power supply.
Further, rectification power supply management unit includes MCU, communication interface, input interface and display screen with MCU connects the communication, rectification power supply management unit passes through communication interface and each rectification power supply are connected the communication, MCU passes through communication interface gathers the operating condition parameter of each rectification power supply and carries out parameter setting to each rectification power supply.
Furthermore, each rectification power supply is connected with an electrical isolation circuit, and is connected with the communication interface through the electrical isolation circuit.
Further, each rectified power supply comprises a plurality of rectified power supply units connected in parallel with each other.
Further, each lithium battery comprises a plurality of lithium battery cells connected in parallel with each other.
Further, each rectifying power supply comprises a plurality of rectifying power supply units which are connected in parallel, and each lithium battery comprises a plurality of lithium battery units which are connected in parallel.
Compared with the prior art, the utility model provides an online charging device of lithium cell adopts each rectifier power supply in the series connection rectifier power supply group to charge respectively each lithium cell in the series connection lithium cell group, has guaranteed that every lithium cell can both realize independent charge management, ensures that every lithium cell can both be full of the electricity, has realized the equilibrium of each lithium cell electric quantity. And simultaneously, the positive output end is all connected to the positive pole of series lithium cell group and rectification power supply group, the negative output end is all connected to the negative pole of series lithium cell group and rectification power supply group, need not to break off the series connection relation of each lithium cell in the lithium cell group during charging, has ensured that the lithium cell group keeps the state of being prepared for electricity when charging, can satisfy the high requirement of communication field to online standby electricity.
Drawings
Fig. 1 is a schematic diagram of a composition structure of an online charging device for a lithium battery according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a capacity expansion scheme of an online charging device for a lithium battery according to an embodiment of the present invention;
fig. 3 is a schematic view of a second embodiment of an expansion scheme of an online charging device for lithium batteries according to the present invention;
fig. 4 is the third schematic view of the capacity expansion scheme of the online charging device for lithium batteries according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
As shown in fig. 1, the embodiment of the utility model provides an online charging device of lithium cell for to series connection lithium cell group 8 charge, series connection lithium cell group 8 is including a plurality of lithium cells 9 of establishing ties in order, charging device includes rectification power supply group 6, rectification power supply group 6 is including a plurality of rectification power supplies 7 of establishing ties in order, each rectification power supply 7 and each lithium cell 9 one-to-one, and each rectification power supply 7 is connected with lithium cell 9 that corresponds separately, for lithium cell 9 that corresponds separately charges. The quantity of rectifier power supply 7 equals with the quantity of lithium cell 9 promptly, and different rectifier power supply 7 charges for different lithium cell 9, like this, has guaranteed that every lithium cell 9 can both realize independently charging, ensures that every lithium cell 9 can both be full of the electricity, has realized the equilibrium of each lithium cell 9 electric quantity. A battery management system 10 may be provided for the lithium battery 9 to implement power management of the lithium battery 9.
Meanwhile, in the charging device, the positive electrode of the series lithium battery pack 8 is connected with the positive output end 11, the negative electrode of the series lithium battery pack 8 is connected with the negative output end 12, the positive electrode of the rectification power supply pack 6 is connected with the positive output end 11, and the negative electrode of the rectification power supply pack 6 is connected with the negative output end 12. Therefore, the series connection relation of the lithium batteries 9 in the lithium battery pack 8 is not required to be disconnected during charging, the lithium battery pack 8 is ensured to keep a standby power state during charging, and the high requirement of the communication field on online standby power can be met. Meanwhile, the positive electrode of the rectification power supply group 6 is connected with the positive output end 11, the negative electrode of the rectification power supply group 6 is connected with the negative output end 12, and the rectification power supply group 6 can continuously provide high-voltage direct-current power supply for an external load while charging the lithium battery pack 8. If the external alternating current is in power failure, the rectifying power supply unit 6 stops supplying power to the load, and the lithium battery pack 8 immediately provides online backup power supply to ensure the normal work of the load. The number of lithium batteries 9 that the accessible was established ties in the adjustment lithium cell group 8 is in order to obtain different high voltage direct current voltage, take 48V of every lithium battery 9 output as an example, and 192V direct current output voltage can be obtained to 4 lithium batteries 9 series connection, and 288V direct current output voltage can be obtained to 6 lithium batteries 9 series connection, and 384V direct current output voltage can be obtained to 8 lithium batteries 9 series connection to satisfy different voltage demands.
The charging device can further comprise a rectifying power supply management unit 1, wherein the rectifying power supply management unit 1 is connected with each rectifying power supply 7 and is used for monitoring the working state of each rectifying power supply 7 and setting parameters of each rectifying power supply 7.
In this charging device, rectification power supply management unit 1 includes MCU3, communication interface 5, input interface 2 and display screen 4 with MCU3 connection communication, rectification power supply management unit 1 passes through communication interface 5 and each rectification power supply 7 are connected the communication, MCU3 passes through communication interface 5 gathers the operating condition parameter of each rectification power supply 7 and carries out parameter setting to each rectification power supply 7. Each rectifying power supply 7 is connected with an electrical isolation circuit, and is connected with the communication interface 5 through the electrical isolation circuit so as to ensure the connection safety.
In addition, the charging device can realize capacity expansion. The expansion comprises the expansion of the rectification power supply group 6 and the expansion of the series lithium battery group 8. As shown in fig. 2, in terms of expansion of the rectified power supply group 6, each rectified power supply 7 may include several rectified power supply units 14 connected in parallel with each other, so that the rectified power supply group 6 can provide a stronger dc output capability. As shown in fig. 3, each lithium battery 9 may include several lithium battery cells 13 connected in parallel with each other in terms of capacity expansion of the series lithium battery pack 8, thereby enabling the lithium battery pack 8 to provide a larger standby capacity and a longer standby time.
The two expansion modes can be combined, that is, as shown in fig. 4, each rectified power supply 7 includes a plurality of rectified power supply units 14 connected in parallel with each other, and each lithium battery 9 includes a plurality of lithium battery units 13 connected in parallel with each other. Therefore, the rectifying power supply group 6 can provide stronger direct current output capacity, and the lithium battery group 8 can provide larger standby capacity and longer standby time. Through modular design rectifier power supply unit 6 and series lithium cell group 8, the capacity configuration is nimble changeable, can conveniently adjust, satisfies the dilatation upgrading needs, when the maintenance is changed, also can realize not cutting off the power supply and change rectifier power supply 7 and lithium cell 9.
The above embodiments are only preferred embodiments and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The online charging device is characterized by comprising a rectification power supply set, wherein the rectification power supply set comprises a plurality of rectification power supplies which are sequentially connected in series, each rectification power supply corresponds to each lithium battery one by one, and each rectification power supply is connected with the corresponding lithium battery to charge the corresponding lithium battery;
the positive electrode of the series lithium battery pack is connected with the positive output end, and the negative electrode of the series lithium battery pack is connected with the negative output end;
the positive pole of the rectification power supply group is connected with the positive output end, and the negative pole of the rectification power supply group is connected with the negative output end.
2. The online charging device for lithium battery as claimed in claim 1, further comprising a rectified power management unit connected to each rectified power for monitoring the operating status of each rectified power and performing parameter setting on each rectified power.
3. The online charging device for the lithium battery as claimed in claim 2, wherein the rectifying power management unit comprises an MCU, a communication interface, an input interface and a display screen, the communication interface, the input interface and the display screen are connected with the MCU for communication, the rectifying power management unit is connected with each rectifying power through the communication interface for communication, and the MCU collects the operating state parameters of each rectifying power through the communication interface and sets the parameters of each rectifying power.
4. An online charging device for lithium batteries according to claim 3, characterized in that each rectified power supply is connected with an electrical isolation circuit, through which it is connected with the communication interface.
5. An online charging device for lithium batteries according to claim 1, characterized in that each rectified power supply comprises several rectified power supply units connected in parallel with each other.
6. The online charging device for lithium batteries according to claim 1, wherein each lithium battery comprises a plurality of lithium battery cells connected in parallel with each other.
7. The online lithium battery charging device according to claim 1, wherein each of the rectified power supplies comprises a plurality of rectified power supply units connected in parallel with each other, and each of the lithium batteries comprises a plurality of lithium battery units connected in parallel with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922262705.1U CN210985698U (en) | 2019-12-17 | 2019-12-17 | Online charging device for lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922262705.1U CN210985698U (en) | 2019-12-17 | 2019-12-17 | Online charging device for lithium battery |
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| CN210985698U true CN210985698U (en) | 2020-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110867933A (en) * | 2019-12-17 | 2020-03-06 | 成都鸣诺科技有限公司 | Online charging device for lithium battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110867933A (en) * | 2019-12-17 | 2020-03-06 | 成都鸣诺科技有限公司 | Online charging device for lithium battery |
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