Hybrid series formation system

Abstract

The invention provides a hybrid series formation system which comprises a hybrid power supply module and a hybrid needle bed module, the hybrid power supply module and the hybrid needle bed module are connected through a connecting line, the hybrid power supply module comprises an ACDC module and a DCDC module, and the ACDC module and the DCDC module are electrically connected; the hybrid needle bed module comprises switching modules and a plurality of series storage location modules, the series storage location modules are connected in series through the switching modules, the adjacent switching modules are connected in series with the other branch, one end of the hybrid needle bed module is electrically connected with one end of the DCDC module, and the other end of the hybrid needle bed module is electrically connected with the other end of the DCDC module. According to the hybrid series formation system, a plurality of series storage locations can be charged and discharged at the same time through one DCDC module, when a certain battery in a certain series storage location reaches a set voltage, a bypass of the storage location can be cut out, normal charging and discharging of other storage locations are not affected, the formation cost is low, and the efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of battery processing, and in particular to a hybrid series formation system. Background Art

[0002] In the prior art, a necessary stage in the production of single cells is "formation", that is, after the single cells are assembled, they are charged and discharged under certain conditions to activate the active substances on the electrodes of the single cells, and at the same time, a dense film is generated on the surface of the anode to protect the entire chemical interface.

[0003] At present, there are many charging solutions for the battery formation stage on the market, among which the common solutions are parallel formation or series formation. Traditional series formation is that all batteries are directly connected in series, and the number of energy feedback modules required is much less than that of the parallel solution, with fewer power cables, reduced line loss, and higher efficiency. However, the manufacturing process of the formation battery cannot be made completely consistent, and the time it takes to fully charge the battery may be different. If it is a traditional direct series formation solution, when a battery is charged to the set voltage, the current output of the energy feedback module will be stopped, resulting in further deterioration of consistency.

[0004] Although parallel connection can solve the battery consistency problem and charge independently, the efficiency of parallel connection is reduced due to the large line loss. The introduction of CC and CV bypass solutions for series formation makes up for the shortcomings of traditional series formation solutions and brings series formation solutions into a new stage in the market. Even so, after the emergence of series formation solutions with bypass, there will still be bottlenecks that make it difficult to improve costs and efficiency.

[0005] At present, in the market, if customers use the series connection solution on site, one storage location requires at least one module power supply, and a rack requires as many module power supplies as the number of storage locations. It is difficult to continue to improve the efficiency of the system, and the basic principle of reducing costs and increasing efficiency is difficult to achieve.

[0006] Therefore, it is necessary to provide a hybrid series formation system to further optimize the system efficiency in the formation stage and achieve the basic principle of reducing costs and increasing efficiency. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention proposes a low-cost, high-efficiency hybrid series formation system.

[0008] To implement the above technical solution, the present invention provides a hybrid serial formation system, including: a hybrid power module and a hybrid needle bed module, the hybrid power module and the hybrid needle bed module are connected by a connecting line, the hybrid power module includes an ACDC module and a DCDC module, and the ACDC module is electrically connected to the DCDC module; the hybrid needle bed module includes a switching module and a plurality of serial storage location modules, each serial storage location module is connected in series through the switching module, and adjacent switching modules are connected in series with another branch, one end of the hybrid needle bed module is electrically connected to one end of the DCDC module, and the other end of the hybrid needle bed module is electrically connected to the other end of the DCDC module.

[0009] Preferably, the ACDC module serves as the input end of the hybrid power module, the DCDC module serves as the output end of the hybrid power module, and the number of the DCDC module is 1, and the ACDC module provides a 700V DC bus input for the DCDC module.

[0010] Preferably, the DCDC module has an adjustable output voltage of 0 to 500V and an adjustable output current of 0 to 120A. It can simultaneously support up to 4 storage locations with a maximum of 24 batteries in series charging / discharging in each location. It is compatible with single-location, 2-location series charging / discharging, and 3-location series charging / discharging.

[0011] Preferably, the series storage location module includes a series battery pack and a storage location voltage sampling board, and the storage location voltage sampling board is used to collect voltage data of the series battery pack in the entire storage location and transmit data with the DCDC module through CAN communication.

[0012] Preferably, the switching module includes a main switching unit and a bypass switching unit, and the main switching unit and the bypass switching unit serve as switching elements for current loop switching. When charging / discharging is required, the DCDC module notifies the main switching unit to switch in and the bypass switching unit to switch out through CAN communication; when the voltage of a battery in the storage location reaches a set value, the DCDC module notifies the main switching unit to switch out and the bypass switching unit to switch in.

[0013] The beneficial effects of a hybrid series formation system provided by the present invention are:

[0014] (1) The series formation system proposed by the present invention has only one DCDC module, which can charge and discharge multiple series storage locations simultaneously. When a battery in a series storage location reaches a set voltage, the storage location can be bypassed without affecting the normal charging and discharging of other storage locations. At the same time, because there is only one DCDC module, the cables in each storage location will be further reduced, the line loss will be reduced, and the efficiency will be improved.

[0015] (2) The series formation system proposed by the present invention uses only one DCDC module, and accordingly, only one ACDC module will be used. In addition, the number of accessories such as circuit breakers and fuses in the entire system will be reduced simultaneously. After the number of power modules and accessories in the system is reduced, the overall power cabinet space will also be reduced, optimizing the floor space and optimizing the heat dissipation and fan requirements of the power cabinet, further reducing costs and reducing the volume.

[0016] (3) The present invention adopts high voltage 700VACDC, which can further improve the efficiency compared with the traditional existing medium voltage ACDC. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the framework of the hybrid series formation system in the present invention.

[0018] Figure 2 The hybrid series formation system framework details of the present invention Figure I .

[0019] Figure 3 This is the framework details of the hybrid series formation system of the present invention Figure II .

[0020] Figure 4 This is the framework details of the hybrid series formation system of the present invention Figure III . DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0022] Embodiments of the present invention are now described with reference to the accompanying drawings, in which similar element numbers represent similar elements. It should be noted that the orientation descriptions involved in the present invention, such as the orientations or positional relationships indicated by up, down, left, right, front, and back, are all based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions or / and simplifying the descriptions of the present application, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present application. The first, second, etc. described are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. The described quantitative nouns 1, 2, n, m, etc. are only used for simplified descriptions of quantity and cannot be understood as limitations on the quantitative descriptions of the present application.

[0023] Embodiment: A hybrid series formation system.

[0024] Combination Figure 1 and Figure 2 As shown, the hybrid serial formation system provided by the present invention includes a hybrid power module 100 and a hybrid needle bed module 200. The hybrid power module 100 includes an ACDC module 110 and a DCDC module 120. The hybrid needle bed module 200 includes a switching module 210 and a plurality of serial storage modules 220.

[0025] The ACDC module 110 is electrically connected to the DCDC module 120 to provide a 700V DC bus input for the DCDC module 120. The ACDC module 110 serves as the input end of the hybrid power module, and the DCDC module 120 serves as the output end of the hybrid power module. The number of the DCDC module 120 is only one.

[0026] Combination Figure 3 As shown, the serial storage module 220 includes a serial battery group 222 and a storage voltage sampling board 221. The switching module 210 includes a main switching unit 211 and a bypass switching unit 212.

[0027] In this embodiment, the hybrid needle bed module 200 includes a plurality of the serial storage modules 220 and a plurality of the switching modules 210. The switching module 210 has three electrical terminals, namely, an input terminal, an output terminal 1, and an output terminal 2. The serial battery group module 222 has two electrical terminals, namely, an input terminal and an output terminal.

[0028] In this embodiment, one end of the DCDC module 120 is electrically connected to the input end of the first switching module 210, and the output end 1 of the first switching module 210 is electrically connected to the input end of the first series battery module 222. The output end of the first series battery module 222 will be electrically connected to the input end of the next switching module 210. In addition, the output end 2 of the first switching module 210 will be connected in parallel to the input end of the next switching unit 210. By analogy, one switching module 210 and the series battery module 222 serve as a module, and up to 4 modules can be connected in series. The other end of the DCDC module 120 will be electrically connected to the output end of the last series storage module, and the output end 2 of the last switching module 210 will also be connected in parallel to the other end of the DCDC module 120.

[0029] More specifically, the output voltage of the DCDC module 120 is adjustable from 0 to 500 V, and the output current is adjustable from 0 to 120 A. It can simultaneously support up to 4 storage locations, with a maximum of 24 batteries in each location being charged in series.

[0030] Combination Figure 3 , Figure 4 As shown, the switching module 210 includes a main switching unit 211 and a bypass switching unit 212. The main switching unit 211 and the bypass switching unit 212 are switching elements for switching the power circuit. When charging / discharging is required, the DCDC module 120 will notify the main switching unit 211 to switch in through CAN communication, and the bypass switching unit 212 will switch out. Then, the current loop will be from the DCDC module 120 to the main switching unit 211 and then to the series battery group 222, and the battery can be charged / discharged normally; when the voltage of a battery in the storage position is detected to reach a set value, the DCDC module 120 will notify the main switching unit 211 to switch out, and the bypass switching unit 212 will switch in. Then, the current loop will be from the DCDC module 120 to the bypass switching unit 212 and then to the input end of the next switching module 210. This state is equivalent to skipping the series battery group 222, and does not affect the normal charging and discharging of the next series battery group 222.

[0031] More specifically, the switching module 210 has two working states, one is that the main switching unit 211 is switched on and the bypass switching unit 212 is switched off. In this state, the series-connected battery group 222 can be charged / discharged normally; the other is that the main switching unit 211 is switched off and the bypass switching unit 212 is switched on. In this state, the series-connected battery group 222 cannot be charged / discharged and is bypassed. Since each storage location is connected in series with the switching module 210, it is possible to realize one DCDC module 120 with multiple series storage location modules 220.

[0032] More specifically, the series battery group 222 includes multiple batteries connected in series, and the storage location voltage sampling board 221 can collect all voltage data of the series battery group 222 in the entire storage location, and transmit data with the DCDC module 120 through CAN communication to feedback the current voltage status of each battery in the series battery group 222.

[0033] In summary, the hybrid series formation system of the present invention has the following technical effects:

[0034] (1) The present invention adopts high voltage 700VACDC, which can further improve the efficiency compared with the conventional existing medium voltage ACDC.

[0035] (2) The series formation system proposed by the present invention has only one DCDC module, which can charge and discharge multiple series storage locations simultaneously. When a battery in a series storage location reaches a set voltage, the storage location can be bypassed and cut out without affecting the normal charging and discharging of other storage locations. At the same time, because there is only one DCDC module, the cables in each storage location will be further reduced, the line loss will be reduced, and the efficiency will be improved.

[0036] (3) The series formation system proposed by the present invention uses only one DCDC module, and accordingly, only one ACDC module will be used. In addition, the number of accessories such as circuit breakers and fuses in the entire system will be reduced simultaneously. After the number of power modules and accessories in the system is reduced, the overall power cabinet space will also be reduced, optimizing the floor space and optimizing the heat dissipation and fan requirements of the power cabinet, further reducing costs and reducing volume.

[0037] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A hybrid series formation system, characterized in that include: A hybrid power module and a hybrid needle bed module, wherein the hybrid power module and the hybrid needle bed module are connected via a connecting line, wherein the hybrid power module comprises an ACDC module and a DCDC module, wherein the ACDC module is electrically connected to the DCDC module; wherein the hybrid needle bed module comprises a switching module and a plurality of serial storage location modules, wherein each serial storage location module is connected in series via the switching module, and adjacent switching modules are connected in series with another branch, wherein one end of the hybrid needle bed module is electrically connected to one end of the DCDC module, and the other end of the hybrid needle bed module is electrically connected to the other end of the DCDC module.

2. A hybrid series formation system according to claim 1, characterized in that: The ACDC module serves as the input end of the hybrid power module, the DCDC module serves as the output end of the hybrid power module, and the number of the DCDC module is 1. The ACDC module provides a 700V DC bus input for the DCDC module.

3. A hybrid series formation system as claimed in claim 2, characterized in that: The output voltage of the DCDC module is adjustable from 0 to 500V, and the output current is adjustable from 0 to 120A. It can simultaneously support up to 4 storage locations with a maximum of 24 batteries in series charging / discharging in each storage location. It is compatible with single storage location, 2 storage locations in series charging / discharging, and 3 storage locations in series charging / discharging.

4. A hybrid series formation system as claimed in claim 1, characterized in that: The serial storage location module includes a serial battery group and a storage location voltage sampling board. The storage location voltage sampling board is used to collect voltage data of the serial battery group in the entire storage location and transmit data with the DCDC module through CAN communication.

5. A hybrid series formation system as claimed in claim 4, characterized in that: The switching module includes a main switching unit and a bypass switching unit, which serve as switch elements for current loop switching. When charging / discharging is required, the DCDC module notifies the main switching unit to switch in and the bypass switching unit to switch out through CAN communication; when the voltage of a battery in the storage location reaches a set value, the DCDC module notifies the main switching unit to switch out and the bypass switching unit to switch in.

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