Battery control circuit and battery system

Abstract

The utility model discloses a battery control circuit and a battery system, the battery control circuit comprises a plurality of power generation units and a plurality of adjusting units, and the plurality of power generation units are connected in parallel; the adjusting unit is connected with the at least one power generation unit and is configured to perform voltage reduction or boosting processing on the connected power generation unit based on a preset reference voltage, so that the difference value between the output voltage of the connected power generation unit and the preset reference voltage is smaller than or equal to a preset voltage threshold value; and if the difference value between the original voltages of one group of power generation units is smaller than or equal to the preset error threshold value, one group of power generation units share the same adjusting unit, so that mismatch between different power generation units in the battery assembly can be improved, the power generation efficiency is improved, the service life of the battery is prolonged, and meanwhile, the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of battery management, and more specifically, to a battery control circuit and a battery system. Background Art

[0002] Compared with single-layer components, laminated solar modules can further improve the existing photovoltaic energy conversion efficiency and reduce the power generation cost through light-absorbing layers with two or more bandgaps. Taking a mechanical laminated module with a transparent perovskite cell on the upper layer and a crystalline silicon cell on the lower layer as an example, under normal circumstances, the electrical parameters of the perovskite module and the crystalline silicon module are different, and a certain layout design is required for matching, with relatively high requirements for voltage or current matching. However, both voltage and current matching require cutting and series-parallel design of the batteries, which is currently difficult for perovskite modules and has a certain impact on efficiency and stability. In addition, under different irradiation, different temperatures, and different shading conditions of different types of photovoltaic cells, the power generation conditions of the upper and lower photovoltaic units are different, and there is a deviation in the optimal operating point. This situation will lead to a certain amount of mismatch loss. In the case of a mismatch problem between the upper and lower battery units, their output voltages are also different. Furthermore, due to the different voltages of the upper and lower battery units, there is an internal current generated by the upper and lower battery units forming a loop, which damages the battery. Summary of the Utility Model

[0003] This application provides a battery control circuit and a battery system, which can improve the mismatch between different power generation units, improve the power generation efficiency and battery life, and have a relatively low cost at the same time.

[0004] The technical solution of this application is realized as follows:

[0005] In a first aspect, an embodiment of this application provides a battery control circuit. The battery control circuit includes a plurality of power generation units and a plurality of adjustment units, and the plurality of power generation units are connected in parallel; the adjustment unit is connected to at least one of the power generation units and is configured to perform step-down or step-up processing on the connected power generation unit based on a preset reference voltage, so that the difference between the output voltage of the connected power generation unit and the preset reference voltage is less than or equal to a preset voltage threshold; wherein, if the difference between the original voltages of a group of power generation units is less than or equal to a preset error threshold, then a group of power generation units share the same adjustment unit.

[0006] By the above technical means, since the adjustment unit can adjust the output voltage of the power generation unit to be almost the same as the preset reference voltage, the mismatch between different power generation units can be eliminated, and the charging efficiency and battery life can be improved; at the same time, since some power generation units can share the same adjustment unit, the circuit area can also be reduced and the cost can be saved.

[0007] In some embodiments, an original voltage is generated between the positive connection terminal and the negative connection terminal of the body of each power generation unit, and an output voltage is generated between the positive output terminal and the negative output terminal of each power generation unit; the battery control circuit further includes a control module; the control module is connected to the adjustment unit and the power generation unit, and is configured to generate a plurality of adjustment signals, and send one adjustment signal to one of the adjustment units; and, obtain the original voltage of each power generation unit, and based on the voltage difference between the obtained original voltage and the preset reference voltage, adjust the duty cycle of each adjustment signal respectively; the adjustment unit is configured to receive and based on the adjustment signal, perform step-up or step-down processing on the original voltage of the connected power generation unit, so that the difference between the output voltage of the power generation unit and the preset reference voltage is less than or equal to a preset voltage threshold.

[0008] By the above technical means, the control module is used to monitor the voltage of the power generation unit, output an adjustment signal to the adjustment unit, and then realize the step-up or step-down of the power generation unit, so as to eliminate the mismatch between different power generation units.

[0009] In some embodiments, if the original voltage of the power generation unit corresponding to the adjustment unit is less than the preset reference voltage, the adjustment unit includes a boost chopper Boost circuit; if the original voltage of the power generation unit corresponding to the adjustment unit is greater than the preset reference voltage, the adjustment unit includes a buck chopper Buck circuit.

[0010] By the above technical means, the voltage adjustment of the power generation unit is realized by using the Boost circuit and / or the Buck circuit, which can meet the requirements of various application scenarios.

[0011] In some embodiments, the Buck circuit includes a first switch, a first diode, a first inductor, and a first capacitor; the gate terminal of the first switch receives the adjustment signal, the first terminal of the first switch is connected to the positive connection terminal of the body of the power generation unit, and the second terminal of the first switch and the output terminal of the first diode are connected to the first terminal of the first inductor; the second terminal of the first inductor and the second terminal of the first capacitor are both connected to the positive output terminal of the power generation unit; the negative connection terminal of the body of the power generation unit, the input terminal of the first diode, and the first terminal of the first capacitor are all connected to the negative output terminal of the power generation unit; the positive output terminals of each power generation unit are connected in parallel, and the negative output terminals of each power generation unit are connected in parallel.

[0012] By the above technical means, by controlling the on / off time of the first switch, the amplitude of the step-down processing is controlled, and the mismatch problem between different power generation units is eliminated.

[0013] In some embodiments, the Boost circuit includes a second switch, a second diode, a second inductor, and a second capacitor; a first end of the second inductor is connected to the positive terminal of the main body of the power generation unit, a second end of the second inductor, a first end of the second switch, and an input terminal of the second diode are connected, and an output terminal of the second diode is connected to the positive output terminal of the power generation unit; a second end of the second switch, a negative terminal of the main body of the power generation unit, and a second end of the second capacitor are connected to the negative output terminal of the power generation unit; a gate terminal of the second switch receives an adjustment signal; positive output terminals of each power generation unit are connected in parallel, and negative output terminals of each power generation unit are connected in parallel.

[0014] By the above technical means, by controlling the on / off time of the second switch, the amplitude of the boost process is controlled, and the mismatch problem between different power generation units is eliminated.

[0015] In some embodiments, the battery control circuit further includes a plurality of power point tracking modules, and each power point tracking module is connected to at least a positive terminal and a negative terminal of the main body of one power generation unit; the power point tracking module is configured to track the target power point of the connected power generation unit and adjust the output parameters of the connected power generation unit based on the tracking result to make it in the target power state.

[0016] By the above technical means, a power point tracking module is additionally provided for the power generation unit, and the maximum power point can be tracked by using the MPPT tracking technology, thereby improving its output power.

[0017] In some embodiments, if the difference between the original voltages of a group of the power generation units is less than or equal to a preset error threshold, then a group of the power generation units share the same power point tracking module.

[0018] By the above technical means, power point tracking modules can be reused by power generation units with the same output characteristics, thereby reducing the circuit area and saving the circuit cost.

[0019] In some embodiments, the battery control circuit further includes a plurality of first protection devices and / or a plurality of second protection devices; the first protection device is connected in series between the positive connection terminal and the positive output terminal of the body of a power generation unit; the first protection device is configured to allow unidirectional current flow between the battery body of the power generation unit and the output terminal of the power generation unit; the first protection device is specifically a diode or a triode; the second protection device is connected in series between the positive connection terminal and the positive output terminal of the body of a power generation unit; the second protection device is configured to control the positive connection terminal and the positive output terminal of the body of the power generation unit to be in a conducting state if the operating state of the power generation unit meets a preset condition; or, to control the positive connection terminal and the positive output terminal of the body of the power generation unit to be in an open state if the operating state of the power generation unit does not meet the preset condition; wherein, the preset condition at least includes that the power of the power generation unit is greater than or equal to a preset power threshold, and the second protection device is specifically a switching device or a triode.

[0020] By the above technical means, the first protection device can prevent the power generation unit from flowing back to the power generation unit, improving the battery life; at the same time, when the power generation unit fails or is abnormal, the second protection device is used to disconnect the power generation unit, which will not have a negative impact on the operating state of the battery control circuit.

[0021] In some embodiments, the battery control circuit further includes a communication module; the communication module is configured to collect the operating parameters of the battery control circuit and send the collected operating parameters to a target server.

[0022] By the above technical means, data remote transmission and self-diagnosis processing are realized through the communication module, better monitoring the operating state of the battery control circuit and improving the operating stability of the battery control circuit.

[0023] In some embodiments, a plurality of power generation units are combined to form a photovoltaic laminate module for converting the absorbed light energy into electrical energy; the photovoltaic laminate module has an upper surface and a lower surface arranged opposite to each other, and a plurality of power generation units are stacked between the upper surface and the lower surface, and the light absorption layer bandgaps of the plurality of power generation units are not completely the same.

[0024] By the above technical means, for the photovoltaic laminate module, the mismatch problem of different battery layers can be well eliminated, and the power generation efficiency can be improved by using light absorption layers with different bandgaps.

[0025] In a second aspect, the embodiments of the present application provide a battery system, the battery system includes a plurality of battery control circuits as in the first aspect, and the plurality of battery control circuits are connected in series and / or in parallel.

[0026] A battery control circuit and a battery system provided by an embodiment of the present application. The battery control circuit includes a plurality of power generation units and a plurality of adjustment units. Since the adjustment units can adjust the output voltage of the power generation units to be nearly the same as a preset reference voltage, and some of the power generation units can share the same adjustment unit, the mismatch between different power generation units can be eliminated, the charging efficiency and the battery life can be improved, and the cost is relatively low. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the composition of a power generation unit, a stacked component, and a photovoltaic string provided by an embodiment of the present application;

[0028] Figure 2 It is a schematic structural diagram of the composition of a battery control circuit provided by an embodiment of the present application Figure 1 ;

[0029] Figure 3 It is a schematic structural diagram of the composition of a battery control circuit provided by an embodiment of the present application Figure 2 ;

[0030] Figure 4 It is a schematic structural diagram of the composition of a battery control circuit provided by an embodiment of the present application Figure 3 ;

[0031] Figure 5 It is a schematic structural diagram of the composition of a battery control circuit provided by an embodiment of the present application Figure 4 ;

[0032] Figure 6A It is a schematic structural diagram of the composition of a Buck circuit provided by an embodiment of the present application;

[0033] Figure 6B It is a schematic structural diagram of the composition of a Boost circuit provided by an embodiment of the present application;

[0034] Figure 7 It is a schematic structural diagram of the composition of a battery control circuit provided by an embodiment of the present application Figure 5 ;

[0035] Figure 8 It is a schematic structural diagram VI of the composition of a battery control circuit provided by an embodiment of the present application;

[0036] Figure 9 It is a schematic structural diagram of the composition of a stacked component provided by an embodiment of the present application;

[0037] Figure 10 It is a schematic structural diagram of the composition of a battery control circuit provided by an embodiment of the present application Figure 7 ;

[0038] Figure 11Schematic diagram of the composition structure of a battery system provided by an embodiment of the present application Figure 1 ;

[0039] Figure 12 Schematic diagram of the composition structure of a battery system provided by an embodiment of the present application Figure 2 ;

[0040] Figure 13 Schematic framework diagram of a battery control circuit provided by an embodiment of the present application;

[0041] Figure 14 Schematic diagram of the working process of a battery control circuit provided by an embodiment of the present application. Detailed implementation manners

[0042] In order to be able to understand the features and technical content of the embodiments of the present application in more detail, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0044] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0045] It should also be noted that the terms "first / second / third" related to the embodiments of the present application are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence when permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0046] In addition, in the embodiments of the present application, it should also be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" generally refer to the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0047] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding interpretations of the spatial relative descriptions used herein will be made accordingly.

[0048] In addition, it should also be understood that when a component is referred to as "on another component", "connected to another component", "coupled to another component", or "in contact with another component", it can be directly on, connected to, or coupled to, or in contact with the other component, or there may be an intervening component. Similarly, when the first component is referred to as "electrically connected", "electrically contacted", or "electrically coupled to" the second component, there is an electrical path allowing current to flow between the first component and the second component. The electrical path may include capacitors, coupled inductors, and / or other components allowing current to flow, even if there is no direct contact between the conductive components.

[0049] Glossary:

[0050] PWM (Pulse Width Modulation): A technique for modulating the pulse width of a pulse signal;

[0051] MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor): Metal-Oxide-Semiconductor Field-Effect Transistor;

[0052] IGBT (Insulate-Gate Bipolar Transistor): Insulated Gate Bipolar Transistor;

[0053] DC / DC (Direct Current / Direct Current): DC-DC conversion.

[0054] Please refer to Figure 1 , for an explanation of the referential meaning of the battery concept involved in this application:

[0055] (1) Power generation unit

[0056] The power generation unit refers to the basic unit that can realize the mutual conversion between other forms of energy and electric energy. For example, in a thin-film battery (such as a perovskite battery), the sub-battery composed of a bottom electrode, a semiconductor layer, and a top electrode (realizing separation and series-parallel connection through the P1, P2, and P3 grooved lines in the manufacturing process), or the cell in a non-thin-film battery (such as a crystalline silicon battery). Generally taking the all-series connection structure as an example for illustration, but it does not constitute a relevant limitation), after forming a power generation unit, independent positive and negative electrodes are led out . For example, the electron-emitting unit does not perform independent positive and negative electrode leads, but is connected in series and parallel ( Figure 2 Only taking the sub-cell of the perovskite solar cell taking the all-series connection structure as an example for illustration, but it does not constitute a relevant limitation), after forming a power generation unit, independent positive and negative electrodes are led out .

[0057] (2) Power generation unit

[0058] Please refer to Figure 1 , the power generation unit refers to the smallest unit with independent positive and negative terminal wiring leads, and consists of multiple power generation sub-units formed by series-parallel connection of units, and the specific way of series-parallel connection is not limited

[0059] (3) Stacked component

[0060] Please refer to Figure 1 , multiple power generation units are stacked to form a stacked component, Figure 1 Only the stacking of two power generation units is shown illustrated, but the number of stacked power generation units in the stacked component is not limited. In addition, in this embodiment, the output terminals of the stacked power generation units are connected in parallel and then the positive and negative electrodes are led out, that is, each stacked component leads out 2 output terminals (i.e., the positive output terminal and the negative output terminal ). (4) Photovoltaic string

[0061] Figure 1

[0062] Please refer to Figure 1 , multiple stacked components are connected in series to form a photovoltaic string.

[0063] Compared with single-layer components, tandem solar components (or tandem photovoltaic cells) can further improve the conversion efficiency of photovoltaic energy and reduce the power generation cost through light-absorbing layers with two or more bandgaps. However, there is a problem of mismatch between the power generation units of different layers, which reduces the lifespan of tandem solar components.

[0064] Taking a mechanical tandem component with a transparent perovskite cell on the upper layer and a crystalline silicon cell on the lower layer as an example, due to the large difference in electrical parameters between the upper and lower power generation units, directly paralleling the upper and lower power generation units without electrical parameter matching will result in a large mismatch loss. Due to the large difference in basic electrical parameters between crystalline silicon and perovskite, it is difficult to match the electrical parameters, inevitably resulting in an efficiency loss at the perovskite end.

[0065] To solve this mismatch problem, in some scenarios, the perovskite cell and the crystalline silicon cell can be used as two independent units to draw current and voltage respectively. Although it can avoid the problems caused by inconsistent optoelectronic parameters, it is still essentially an independent perovskite and crystalline silicon cell circuit, and the operating parameters at the system end need to be designed separately, and the advantages of the mechanical tandem component cannot be fully utilized. In addition, this method can only ensure the matching in the initial state and cannot guarantee the matching during the operating life cycle. That is, during operation, the performance of different power generation layers still varies greatly under shadow occlusion, irradiance change, and different attenuation performances.

[0066] The battery control circuit provided in the embodiments of the present application can solve the above problems. The following further elaborates on the present application through the accompanying drawings and specific embodiments.

[0067] In one embodiment of the present application, please refer to Figure 2 , which is a schematic structural diagram of a battery control circuit 10 provided by an embodiment of the present application. Figure 1 As Figure 2 shown, the battery control circuit 10 includes N power generation units 21_1, 21_2... 21_N-1, 21_N and A regulation units 22_1, 22_2... 22_A-1, 22_A. Here, the N power generation units are connected in parallel, and can also be referred to as a battery assembly. Each regulation unit has a corresponding relationship with at least one power generation unit.

[0068] Each regulation unit is connected to the corresponding power generation unit and is configured to step down or step up the connected power generation unit based on a preset reference voltage, so that the difference between the output voltage of the connected power generation unit and the preset reference voltage is less than or equal to a preset voltage threshold. Here, the preset voltage threshold is a pre-set stable voltage, and its specific value can be determined according to actual requirements; "connected" can refer to direct connection or indirect connection.

[0069] In this way, in the embodiment of the present application, the output voltage of the power generation unit is adjusted to be almost the same as the preset voltage threshold by the regulation unit, so that the output voltages of different power generation units can be considered the same within the allowable error range, reducing the difficulty of form factor matching of the battery assembly; on the other hand, since the output voltages of different power generation units are almost the same, no loop will be formed between different power generation units to generate current, and the service life of the power generation unit can also be improved.

[0070] In some embodiments, if the difference between the original voltages of a group of power generation units is less than or equal to a preset error threshold, then a group of power generation units share the same regulation unit (for example, Figure 4 the power generation units 21_1 and 21_2 in share the same regulation unit). In this way, if there are M power generation units (M ≤ N) of the same type with similar electrical parameters, then the difference between their original voltages is very small under the same working conditions. Therefore, the same regulation unit can be used to adjust them, which can reduce the number of regulation units, thereby reducing the overall area of the battery control system and lowering the cost.

[0071] It should be noted that the power generation unit can be a battery of various types, materials, and power generation principles, such as primary batteries, secondary batteries, photovoltaic cells, wind energy batteries... The materials of different power generation units can be the same or different. Each power generation unit has an independent output voltage, that is, each power generation unit has an independent output terminal. In Figure 2Among them, the output terminals of the power generation unit 21_1 are out1+ / out1-, the output terminals of the power generation unit 21_2 are out2+ / out2-... the output terminals of the power generation unit 21_N are outN+ / outN-. Here, taking the battery module as a photovoltaic laminate module as an example, the number of power generation units can be 2. One power generation unit is a crystalline silicon battery, and the other power generation unit is a perovskite battery; alternatively, the number of power generation units can also be 3. Two power generation units are crystalline silicon batteries (in this case, these two power generation units can share the same adjustment unit), and the remaining one power generation unit is a perovskite battery... The above are only examples, and the specific number and type of power generation units can be selected according to actual application requirements.

[0072] In addition, the power generation unit can also be a sodium battery, a lithium battery, etc. Different power generation units are not stacked, and their positions can be arranged arbitrarily.

[0073] It should also be noted that both A and N are positive integers, A≤N, and at the same time, each adjustment unit has a corresponding relationship with at least one power generation unit. In one example, as Figure 2 shown, A = N, and each adjustment unit has a corresponding relationship with one power generation unit; in another example, as Figure 3 shown, A = N - 1, each adjustment unit has a corresponding relationship with one power generation unit, and the power generation unit 21_N has no corresponding relationship with any adjustment unit; in yet another example, as Figure 4 shown, A < N, some adjustment units have a corresponding relationship with one power generation unit, and some adjustment units have a corresponding relationship with multiple power generation units at the same time.

[0074] In some embodiments, please refer to Figure 5 , an original voltage is generated between the body positive connection terminal + / body negative connection terminal - of each power generation unit, and an output voltage is generated between the positive output terminal / negative output terminal (out1+ / out1-, out2+ / out2-... outN+ / outN-) of each power generation unit. Here, Figure 5 is only a schematic diagram of the specific structure of Figure 2 this situation, but Figure 3 , Figure 4 the situations shown can be understood adaptively, and due to space limitations, they are not shown one by one.

[0075] As Figure 5 shown, each adjustment unit is connected between the body positive connection terminal + / body negative connection terminal and the positive output terminal / negative output terminal of the corresponding power generation unit. Regarding Figure 5, that is, the adjustment unit 22_1 is connected between the positive terminal + / negative terminal - of the main body of the power generation unit 21_1 and the positive output terminal out1+ / negative output terminal out1-. The adjustment unit 22_2 is connected between the positive terminal + / negative terminal - of the main body of the power generation unit 21_2 and the positive output terminal out2+ / negative output terminal out2-... The adjustment unit 22_A is connected between the positive terminal + / negative terminal - of the main body of the power generation unit 21_N and the positive output terminal outN+ / negative output terminal outN-.

[0076] Correspondingly, as Figure 5 shown, the battery control circuit 10 further includes a control module 23, and the control module 23 is connected to the positive terminals + and negative terminals - of the A adjustment units and their corresponding power generation units.

[0077] The control module 23 is configured to generate A adjustment signals and send the i-th adjustment signal to the i-th adjustment unit; and, obtain the original voltages of the power generation units corresponding to the A adjustment units respectively, and adjust the duty cycles of the A adjustment signals respectively based on the voltage differences between the obtained original voltages and a preset reference voltage; i is a positive integer, i ≤ A;

[0078] The i-th adjustment unit is configured to receive and, based on the i-th adjustment signal, perform step-down or step-up processing on the original voltage of the corresponding power generation unit, so that the difference between the output voltage of the power generation unit and the preset reference voltage is less than or equal to a preset voltage threshold.

[0079] It should be noted that, in one embodiment, as Figure 5 shown, each power generation unit has a corresponding adjustment unit, so the control module 23 is connected to the positive terminals + / negative terminals - of all power generation units. In another embodiment, as Figure 3 or Figure 4 shown, the power generation unit 21_N does not correspond to any adjustment unit. At this time, the control module 23 is not connected to the power generation unit 21_N either, and there is no need to obtain the original voltage of the power generation unit 21_N. In yet another embodiment, as Figure 4 shown, the power generation unit 21_1 and the power generation unit 21_2 share the same adjustment unit 22_1. At this time, the control module 23 only needs to be connected to one of the power generation unit 21_1 and the power generation unit 21_2 to obtain its original voltage, and there is no need to be connected to the power generation unit 21_1 and the power generation unit 21_2 at the same time.

[0080] In this way, the control module 23 outputs an adjustment signal with a specific duty cycle according to the difference between the original voltage of the power generation unit and the preset reference voltage. This adjustment signal is sent to the corresponding adjustment module, so that the adjustment module adjusts the original voltage of the power generation unit, making the output voltage of the power generation unit consistent with the preset reference voltage, thereby solving the mismatch problem existing between different power generation units.

[0081] In a specific embodiment, the adjustment unit includes a boost chopper Boost circuit and / or a buck chopper Buck circuit.

[0082] (1) If the original voltage of the power generation unit corresponding to the i-th adjustment unit is less than the preset reference voltage, then the i-th adjustment unit is a Boost circuit; i is a positive integer less than or equal to A.

[0083] (2) If the original voltage of the power generation unit corresponding to the i-th adjustment unit is greater than the preset reference voltage, then the i-th adjustment unit is a Buck circuit.

[0084] (3) If the original voltage of the power generation unit corresponding to the i-th adjustment unit is less than the preset reference voltage under the first working condition, and the original voltage of the power generation unit corresponding to the i-th adjustment unit is greater than the preset reference voltage under the second working condition, then the i-th adjustment unit may include a Boost circuit and a Buck circuit at the same time. Specifically, the original voltage of each power generation unit is actually affected by environmental factors (such as temperature, shading, etc.), so the original voltage of the power generation unit may have a large range of variations.

[0085] Correspondingly, the control module 23 is further configured to, if the original voltage of the power generation unit corresponding to the i-th adjustment unit is less than the preset reference voltage, send the generated i-th adjustment signal to the Boost circuit in the i-th adjustment unit; if the original voltage of the power generation unit corresponding to the i-th adjustment unit is greater than the preset reference voltage, send the generated i-th adjustment signal to the Buck circuit in the i-th adjustment unit.

[0086] It should also be noted that, such as Figure 4 the power generation units 21_1 and 21_2 therein share the same adjustment unit. A feasible implementation method is as follows: The control module 23 can adjust the duty cycle of the corresponding adjustment signal according to the difference between the original voltage of one of the power generation units and the first voltage, and send the adjustment signal to the shared adjustment unit. The shared adjustment unit may include 2 Buck circuits (connected to the power generation units 21_1 and 21_2 respectively) or 2 Boost circuits (connected to the power generation units 21_1 and 21_2 respectively), and at the same time, these Buck circuits or Boost circuits all work according to the same received adjustment signal.

[0087] Please refer to Figure 6A , the device types, the number of devices, and the device connection relationships of different Buck circuits are all the same. Figure 6A Only take one of the Buck circuits as an example for marking. As Figure 6A shown, each Buck circuit includes a first switch 411, a first diode 412, a first inductor 413, and a first capacitor 414. The first switch 411 has a gate terminal, a first terminal, and a second terminal. The signal at the gate terminal can determine whether there is a path or an open circuit between the first terminal and the second terminal; the gate terminal of the first switch 411 receives an adjustment signal, that is, the gate terminal of the first switch in the adjustment unit 22_1 receives the first adjustment signal Con1, the gate terminal of the first switch in the adjustment unit 22_2 receives the second adjustment signal Con2... the gate terminal of the first switch in the adjustment unit 22_A receives the A-th adjustment signal ConA. The first terminal of the first switch 411 is connected to the positive terminal + of the main body of the power generation unit, and the second terminal of the first switch 411 and the output terminal of the first diode 412 are connected to the first terminal of the first inductor 413; the second terminal of the first inductor 413 and the second terminal of the first capacitor 414 are both connected to the positive output terminal outi+ of the power generation unit; the negative terminal - of the main body of the power generation unit, the input terminal of the first diode 412, and the first terminal of the first capacitor 414 are all connected to the negative output terminal outi- of the power generation unit.

[0088] As Figure 5 shown, the positive output terminals of all power generation units are connected in parallel, that is, out1+, out2+... outN+ are connected in parallel, and the negative output terminals of all power generation units are connected in parallel, that is, out1-, out2-... outN- are connected in parallel, to generate the overall output voltage of the battery control circuit 10.

[0089] It should be noted that although the types, the number, and the connection relationships of the components of different Buck circuits are the same, due to the different output voltages of different power generation units, that is, the buck requirements of different power generation units may be different, so the electrical parameters of the specific components of different Buck circuits may be different. For example, the inductance of the first inductor 413 and the capacitance of the first capacitor 414 in different Buck circuits may be the same or different.

[0090] It should be noted that the first switch 411 can adopt various types of switches, such as IGBT transistors, MOSFET transistors, etc. The duty cycle of the adjustment signal can control the on / off time of the first switch 411, thereby controlling the buck amplitude.

[0091] Please refer to Figure 6B , the device types, the number of devices, and the device connection relationships of different Boost circuits are all the same. Figure 6BOnly one Boost circuit is taken as an example for marking, such as Figure 6B As shown, each Boost includes a second switch 422, a second diode 423, a second inductor 421, and a second capacitor 424. The first end of the second inductor 421 is connected to the positive terminal + of the main body of the power generation unit. The second end of the second inductor 421, the first end of the second switch 422, and the input end of the second diode 423 are connected. The output end of the second diode 423 is connected to the positive output terminal of the power generation unit; the second end of the second switch 422, the negative terminal - of the main body of the power generation unit, and the second end of the second capacitor 424 are connected to the negative output terminal of the power generation unit; the gate terminal of the second switch 422 receives an adjustment signal; the signal at the gate terminal of the second switch 422 determines whether it is a conducting path or an open circuit between its first end and second end.

[0092] Similarly, the performance parameters of the same type of devices in different Boost circuits can be different.

[0093] In some embodiments, please refer to Figure 7 , the battery control circuit 10 further includes a plurality of power point tracking modules 24. Each power point tracking module 24 is connected to at least the positive terminal + and negative terminal - of the main body of one power generation unit; the power point tracking module 24 is configured to track the target power point (such as the maximum power point) of the power generation unit 21, and adjust the output parameters of the power generation unit 21 based on the tracking result to make it in the target power state (such as the maximum power state). The output parameters include the output current and the output voltage.

[0094] It should be understood that in Figure 7 , each power generation unit is connected to a power point tracking module 24, but this does not constitute a corresponding limitation. Only some power generation units can be connected to the power point tracking module 24.

[0095] It should be noted that whether the power point tracking module 24 can adopt an MPPT controller (Maximum PowerPoint Tracking) time, which independently carries an MPPT algorithm and boost and buck circuits. Exemplarily, the boost circuit can be a Boost circuit, and the buck circuit can be a Buck circuit. The specific working principle of the power point tracking module 24 is to monitor the voltage and current of the power generation unit in real time, calculate the current maximum power point, and then adjust the load so that the output characteristics of the power generation unit are at the maximum power point, which is particularly suitable for photovoltaic cells.

[0096] In some embodiments, if the difference between the original voltages of a group of power generation units (such as M power generation units) is less than or equal to a preset error threshold, then the group of power generation units share the same power point tracking module 24. The preset error threshold is generally set relatively small, that is, the original voltages of a group of power generation units can be regarded as the same.

[0097] Exemplarily, assume that in the battery control circuit 10, there are 3 power generation units all being perovskite batteries. Generally, the output characteristics of the same perovskite batteries are also relatively close, that is, the difference between the original voltages of the 3 perovskite batteries is less than or equal to a preset error threshold. Then, these 3 perovskite batteries can share one regulation unit and one power point tracking module 24, thereby reducing the circuit area.

[0098] In some embodiments, please refer to Figure 8 , the battery control circuit 10 further includes a plurality of first protection devices 25; the first protection devices 25 are connected in series between the positive connection terminal + of the body of a power generation unit and the positive output terminal, and are configured to allow unidirectional current flow from the battery body of the power generation unit to the output terminal.

[0099] In this way, through the first protection device 25, reverse current of the power generation unit 21 can be avoided, and damage to the battery device can be avoided. The first protection device 25 can be implemented by a diode, or the first protection device 25 can also be implemented by a triode, such as an IGBT transistor or a MOSFET transistor. In Figure 8 , each power generation unit is connected in series with a first protection device 25, but this does not constitute a relevant limitation, and only some of the power generation units can be connected in series with a first protection device 25.

[0100] In some embodiments, please refer to Figure 8 , the battery control circuit 10 further includes a plurality of second protection devices 26, and the second protection devices 26 are connected in series between the positive connection terminal + of the body of the power generation unit and the positive output terminal; the second protection devices 26 are configured to, if the working state of the power generation unit 21 meets a preset condition, the positive connection terminal + of the body of the power generation unit and the positive output terminal are in a conducting state, so that the output of the connected power generation unit is effective; if the working state of the power generation unit 21 does not meet the preset condition, the positive connection terminal + of the body of the power generation unit and the positive output terminal are in an open state, so that the output of the connected power generation unit 21 is invalid.

[0101] Exemplarily, the second protection device 26 can specifically be a switching device or a triode, and the first protection device 25 and the second protection device 26 can be implemented by the same triode.

[0102] Meanwhile, the regulation unit is further configured to perform step-down or step-up processing on the connected power generation unit when the outputs of all the connected power generation units are effective; or, when the outputs of the connected power generation units are invalid, not perform step-down or step-up processing on the connected power generation unit.

[0103] It should be noted that the preset conditions are used to measure whether the power generation unit is working properly. For example, the preset conditions at least include that the power of the power generation unit is greater than or equal to the preset power threshold. That is to say, if the power generation unit is damaged or the power is too small, it can be considered that the power generation unit is in an abnormal working state, and the second protection device 26 is used to disconnect the power generation unit; at the same time, the voltage adjustment of the power generation unit is no longer carried out. That is to say, when the second protection device 26 is disconnected, the adjustment signal output by the control module 23 will make the first switch / second switch in the adjustment unit in an open state.

[0104] It should be noted that in Figure 8 , the second protection device 26 is closer to the positive terminal + of the main body of the power generation unit, and the first protection device 25 is closer to the positive output terminal of the power generation unit, but this does not constitute a specific limitation, and the positions of the two can be exchanged.

[0105] In some embodiments, the battery control circuit 10 further includes a communication module; the communication module is configured to collect the working parameters of the battery control circuit 10 and send the collected working parameters to the target server.

[0106] It should be noted that the communication module can adopt a Programmable Logic Controller (PLC). The working parameters of the battery control circuit 10 selectively include but are not limited to the following parameters: the voltage / current between the positive terminal + and the negative terminal - of the main body of the power generation unit 21, the voltage / current between the positive and negative output terminals out0+ and out0-; the voltage / current between the positive terminal + and the negative terminal of the main body of the power generation unit, the voltage / current between the positive and negative output terminals; the duty cycle of the adjustment signal, the duty cycle of the second adjustment signal, so as to realize remote data transmission and performance self-diagnosis and alarm.

[0107] At present, new energy batteries are increasingly widely used in life and industries. New energy batteries are not only applied to energy storage power systems such as hydroelectric, thermal, wind, and solar power stations, but also widely used in electric transportation means such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing. In the embodiments of the present application, the battery may be a power generation unit. A power generation unit refers to a basic unit that can realize the mutual conversion between other forms of energy and electric energy, and can be used to manufacture a battery module or a battery pack, so as to supply power to an electrical device. The power generation unit may be a secondary battery, and a secondary battery refers to a power generation unit that can be activated by charging after discharging to continue to be used. The power generation unit may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc. The power generation unit may also be a photovoltaic battery, and the embodiments of the present application do not limit this.

[0108] In some embodiments, please refer to Figure 9 , the battery assembly formed by multiple power generation units is specifically a photovoltaic laminate assembly for converting the absorbed light energy into electric energy; the photovoltaic laminate assembly has an upper surface and a lower surface arranged oppositely, and multiple power generation units are stacked between the upper surface and the lower surface, and the band gaps of the light absorption layers of the multiple power generation units are not completely the same.

[0109] Figure 9 Taking 2 power generation units as an example for illustration, but the photovoltaic laminate assembly includes two or more power generation units (in this embodiment, the power generation unit can also be called a photovoltaic unit). The band gaps of the light absorption layers contained in different power generation units are different, and the existing photovoltaic energy conversion efficiency is improved through the light absorption layers with different band gaps, and the power generation cost is reduced.

[0110] Please refer to Figure 9 , the following specifically describes taking the battery control circuit 10 applicable to a photovoltaic laminate assembly formed by stacking two power generation units as an example.

[0111] (1) The power generation unit located in the upper layer (the front side, the light-facing side) includes a transparent photovoltaic component, and the power generation unit located in the lower layer may be a transparent photovoltaic component or an opaque photovoltaic component, a single-sided component or a double-sided component, and the specific design, type, and structure of the upper and lower power generation units are not limited.

[0112] (2) The upper and lower power generation units are encapsulated between the upper surface and the lower surface, the upper surface is a light-transmitting surface, and the lower surface is a light-transmitting surface or an opaque surface.

[0113] (3) A transparent insulating material layer is provided between the upper power generation unit and the lower power generation unit, which may be a film, glass or other materials.

[0114] (4) The photovoltaic tandem module needs to be encapsulated, and the encapsulation form is not limited. The tandem module may or may not be assembled with a frame.

[0115] (5) The positive and negative terminal wirings of the upper power generation unit and the lower power generation unit are respectively led out, that is, the positive output terminal and the negative output terminal. The leading-out method is not limited, and the leading-out position is not limited.

[0116] (6) Please refer to Figure 10 , for the photovoltaic tandem module, the positive terminal + / negative terminal - of the silicon-based cell in the lower layer is connected to the Boost circuit, and after DC / DC conversion, the voltage is stepped down. By adjusting the signal Con1 to control the on-off time ratio (i.e., duty cycle) of the second switch 422 (MOSFET or IGBT can be selected), the amplitude of the boosted voltage is determined, and the amplitude of its output voltage is kept consistent with the preset reference voltage.

[0117] (7) Please refer to Figure 10 , for the photovoltaic tandem module, the positive terminal + / negative terminal - of the perovskite cell in the upper layer is connected to the Buck circuit, and after DC / DC conversion, the voltage is stepped down. By adjusting the signal Con2 to control the on-off time ratio (i.e., duty cycle) of the first switch 412 (MOSFET or IGBT can be selected), the amplitude of the stepped-down voltage is determined, and the amplitude of its output voltage is kept consistent with the preset reference voltage. Thus, the voltage amplitudes output by the perovskite-silicon cell and the silicon-based cell are both the preset reference voltage, solving the mismatch problem.

[0118] (8) The preset reference voltage is determined according to the system design, and its value needs to be matched with the mainstream equipment of the existing photovoltaic system.

[0119] (9) Please refer to Figure 10 , the perovskite cell and the silicon-based cell can be configured with a maximum power point tracking MPPT module, with an MPPT tracking algorithm built in. By collecting the current and voltage output from the body connection terminals of the power generation unit, through algorithm calculation, a PWM control signal is output, and finally the DC / DC converter is controlled, so as to realize the adjustment of the load size, and finally realize the tracking of the maximum power points of the perovskite layer and the silicon-based layer respectively.

[0120] (10) Please refer to Figure 10 , the positive and negative output terminals of the perovskite cell and the silicon-based cell adjusted to the same voltage are directly connected in parallel and then output through one positive / negative (Out+ / Out-), and the current is equal to the sum of the current of the perovskite cell and the current of the silicon-based cell, thus perfectly eliminating the mismatch problem in principle of the tandem module.

[0121] (11) There can be multiple battery control circuits 10 in the battery system. After the positive and negative poles Out+ / Out- of each battery control circuit 10 are output, they are then connected in parallel with other battery control circuits 10, and finally connected to the inverter / busbar box interface. Please refer to Figure 11 ; and / or, after the positive and negative poles Out+ / Out- of each battery control circuit 10 are output, they are then connected in series with other battery control circuits 10, and finally connected to the inverter port. For details, please refer to Figure 12 .

[0122] (12) In the photovoltaic laminate module, a smart switch (i.e., the second protection device) can be selectively connected in series in the route from the body positive connection terminal / body negative connection terminal of the crystalline silicon battery (and / or perovskite battery) to the positive output terminal / negative output terminal, serving the purpose of selective shutdown. When it is determined through voltage and current detection that the corresponding power generation unit is abnormal or the output power of the corresponding power generation unit is too small, the smart switch disconnects. At this time, the power output of the photovoltaic laminate module is completely provided by other power generation units.

[0123] (13) In the photovoltaic laminate module, an anti - reverse diode (i.e., the first protection device) can be selectively connected in series in the route from the body positive connection terminal / body negative connection terminal of the crystalline silicon battery (and / or perovskite battery) to the positive output terminal / negative output terminal, which can prevent current backflow.

[0124] (14) The smart switch and the anti - reverse diode can be replaced by a triode (MOSFTE or IGBT), simultaneously realizing the functions of smart shutdown and anti - reverse.

[0125] (15) For the photovoltaic laminate module, a PLC communication module can also be configured to collect parameters of the battery layer and the entire laminate module, realizing data remote transmission and self - diagnosis and warning of abnormal performance.

[0126] (16) As Figure 10 shown, through the battery control circuit, the output voltages of different power generation units are all preset reference voltages. Thus, a power optimization module does not need to be set at the inverter end, and the series - connected photovoltaic laminate module is directly connected to the inverter with a certain current and voltage.

[0127] In this way, for a photovoltaic laminate module formed by stacking two power generation units, please refer to Figure 13 . A power point tracking module 1, an adjustment unit 1 (specifically a Buck circuit), a first protection device 1, and a second protection device 1 are set for the upper - layer perovskite battery, and a power point tracking module 2, an adjustment unit 2 (specifically a Boost circuit), a first protection device 2, and a second protection device 2 are set for the lower - layer crystalline silicon battery. At the same time, the above - mentioned structure is controlled by a control module, and a communication module is introduced to monitor the working state of the photovoltaic laminate module in real time.

[0128] Specifically, please refer to Figure 14 , and the working process of the battery control circuit 10 is as follows:

[0129] S310: Start.

[0130] S311: Maximum power point tracking (MPPT) of the perovskite battery.

[0131] S312: Start the Buck circuit of the perovskite battery.

[0132] S313: Maximum power point tracking (MPPT) of the crystalline silicon battery.

[0133] S314: Start the Boost circuit of the crystalline silicon battery.

[0134] Here, step S311 is implemented by the maximum power point tracking module 1, step S312 is implemented by the adjustment unit 1, step S313 is implemented by the maximum power point tracking module 2, and step S314 is implemented by the adjustment unit 2.

[0135] S315: Adjust the perovskite battery and the crystalline silicon battery to the same voltage amplitude, i.e., the preset reference voltage.

[0136] S316: The perovskite battery and the crystalline silicon battery are connected in parallel for output.

[0137] In this way, for the four-terminal stacked module formed by the crystalline silicon battery and the perovskite battery, since the perovskite battery and the crystalline silicon battery independently generate the photovoltaic effect, generating different output voltages and currents, if directly connected in series and parallel for output, serious mismatch problems will occur, greatly reducing the output power. Since photovoltaic power generation is direct current, if chopper conversion (DC / DC) can be performed on the independent battery layer, the output voltages of the independent battery layers can be unified, thereby eliminating the parallel mismatch caused by voltage inconsistency and eliminating the parallel matching problem under any working conditions, thereby greatly improving the power generation of the stacked module and protecting the circuit to prevent other faults such as reverse breakdown.

[0138] In another embodiment of the present application, please refer to Figure 11 and Figure 12 , which provides a battery system 80. The battery system 80 includes a plurality of the foregoing battery control circuits 10, and the plurality of battery control circuits 10 are connected in series and / or in parallel.

[0139] Here, the battery control circuit 10 includes a plurality of power generation units and corresponding adjustment units. The adjustment units therein can improve the mismatch problem of the power generation units, thereby improving the power generation efficiency and service life of the battery control circuit 10.

[0140] Please refer to Figure 12, taking the battery system 80 including a plurality of serially connected battery control circuits 10 (i.e., photovoltaic strings) as an example, the operating parameters of the battery system 80 need to meet the requirements of the actual working conditions. Therefore, the number of battery control circuits 10 therein is strictly designed. In this embodiment, since the adjustment unit can adjust the output voltage of the battery control circuit 10, the number of battery control circuits 10 included in the battery control circuit 10 can be designed more optimally. The specific description is as follows:

[0141] (1) For each battery control circuit 10, when its output power is determined (i.e., the output power is a fixed value), the product of its output voltage and output current is a fixed value.

[0142] (2) Taking the battery system 80 composed of photovoltaic laminated components as an example, the number of battery control circuits 10 included in the battery system 80 needs to be calculated according to GB 50797-2012 6.4.2. The main logic is: under extreme working conditions, the sum of the working voltages of all battery control circuits 10 needs to be within the voltage range interval [a, b] allowed by the inverter, and the sum of the open-circuit voltages of all battery control circuits 10 needs to be less than or equal to the maximum DC input voltage allowed by the inverter. The calculation of this voltage is related to temperature. When the component selection is determined, its current and voltage are determined, and the number of strings is calculated based on its working voltage Vmppt and open-circuit voltage Voc.

[0143] Through the voltage regulation function of the battery control circuit 10, the working current of each photovoltaic laminated component can be adjusted to the maximum current allowed by the inverter or the maximum current allowed by the photovoltaic cable, taking the lower of the two, thereby reducing the component output voltage of the battery control circuit 10. For the same photovoltaic system (such as a 1000V system or a 1500V system), the number of battery control circuits 10 that can be connected in series allowed by the battery system 80 will increase.

[0144] For the battery system 80, an increase in the number of battery control circuits 10 will help reduce the cost of the photovoltaic system and save the usage of photovoltaic cables.

[0145] Taking the Sunshine Inverter SG225HX and the LONGi LR5-72HGD-560M for measurement, the open-circuit voltage of the battery control circuit 10 is 50.99V, the maximum power point voltage is 42.82V, the short-circuit current is 13.89A, the maximum power point current is 13.08A, and the component power is 560W.

[0146] Based on the current parameters for measurement, according to 6.4.2 of the "Design Code for Photovoltaic Power Stations" GB50797-2012, the number of battery control circuits 10 that can be connected in series allowed by the battery system 80 is 28 pieces.

[0147] However, after adopting the solution of this embodiment, since the maximum allowable current of the inverter is 15A, the short-circuit current of the battery control circuit 10 is adjusted to 15A through the adjustment unit, the maximum power point current correspondingly increases to 14.13A, the maximum power point voltage is adjusted to 39.63V, and the open-circuit voltage is adjusted to 47.22V. Calculated in this way, the number of battery control circuits 10 that the battery system 80 allows to be connected in series is 30, while the original scheme is 28.

[0148] In this way, for a conventional ground power station, for the convenience of wiring, a single set of photovoltaic brackets usually installs a string or an integer multiple of components. Taking the installation of a single string of components by a single set of photovoltaic brackets as an example, the original scheme has 28 pieces, and the new scheme has 30 pieces. The bracket design basically does not need to be changed. The number of components installed by a single set of brackets increases, and the average cost is reduced.

[0149] In addition, the serially connected battery control circuits 10 will be connected to the inverter port. Since the number of battery control circuits 10 increases from 28 to 30, on the premise that the total capacity of the battery array (including multiple battery systems 80) is certain, the number of serially connected battery control circuits 10 increases. At this time, the number of battery systems 80 decreases, so the length of the photovoltaic cable used is reduced, and the cost is reduced.

[0150] In summary, this embodiment provides a battery system, which includes a plurality of the aforementioned battery control circuits. Through power electronics technology, different battery layer voltage conversions are performed to unify the output voltages of different battery layers of the photovoltaic laminated components, eliminating the parallel adaptation problem, thereby greatly improving the power generation of the laminated components, including at least the following:

[0151] (1) A battery control circuit adapted to a combined battery (such as a photovoltaic laminated component formed by a crystalline silicon battery + a perovskite battery), which includes two or more adjustment units, respectively connected to different battery layers of the photovoltaic laminated component, and after being connected in parallel, are aggregated to one output.

[0152] (2) The battery layer with a lower output voltage (taking the crystalline silicon battery as an example) is connected to one of the adjustment units. This adjustment unit uses a Boost circuit, with IGBT or MOSFET as the core component, and through DC / DC DC voltage conversion, controls the voltage increase according to the control module.

[0153] (3) The battery layer with a higher output voltage (taking the perovskite battery as an example) is connected to another adjustment unit. This adjustment unit uses a Buck circuit, with IGBT or MOSFET as the core component, and through DC / DC DC voltage conversion, controls the voltage reduction according to the control module.

[0154] (4) Different power generation units are configured with an input voltage monitoring function (through control) to monitor the voltages of different power generation modules and work collaboratively to perform step-up or step-down processing respectively.

[0155] (5) Through an adjustment unit, the output voltages of the perovskite battery and the crystalline silicon battery are made the same and then directly connected in parallel, thereby eliminating the voltage mismatch problem.

[0156] (6) Different power generation units can be connected in series with MOSFETs or intelligent switches + diodes, which can effectively prevent reverse breakdown. At the same time, according to the input power situation of other battery layers, it can be selected whether to enable the intelligent switch to turn off.

[0157] (7) The battery control circuit can be configured with a PLC communication module to monitor the voltage and current data in the above process in real time and timely feedback abnormal operating conditions.

[0158] The above is only a preferred embodiment of the present application and is not used to limit the protection scope of the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0159] It should be understood that the descriptions of the above storage medium and device embodiments are similar to those of the above method embodiments and have beneficial effects similar to those of the method embodiments. For the technical details not disclosed in the storage medium, storage medium, and device embodiments of the present application, please refer to the descriptions of the method embodiments of the present application for understanding.

[0160] It should be understood that the "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" or "in some embodiments" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the magnitudes of the sequence numbers of the above processes do not mean the order of execution, and the execution order of each process should be determined by its function and internal logic and should not constitute any limitation to the implementation process of the embodiments of the present application. The sequence numbers of the embodiments of the present application above are only for description and do not represent the advantages or disadvantages of the embodiments. The above descriptions of each embodiment tend to emphasize the differences between the embodiments, and the same or similar parts can be referred to each other. For the sake of brevity, they are not repeated herein.

[0161] It should also be noted that in this application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0162] The serial numbers of the embodiments of the present application above are for description only and do not represent the superiority or inferiority of the embodiments.

[0163] The methods disclosed in several method embodiments provided by the present application can be arbitrarily combined without conflict to obtain new method embodiments.

[0164] The features disclosed in several product embodiments provided by the present application can be arbitrarily combined without conflict to obtain new product embodiments.

[0165] The features disclosed in several method or device embodiments provided by the present application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0166] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0167] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery control circuit, characterized in that: The battery control circuit includes a plurality of power generation units and a plurality of adjustment units, and the plurality of power generation units are connected in parallel; The regulating unit is connected to at least one of the power generation units and is configured to perform voltage reduction or voltage increase processing on the connected power generation unit based on a preset reference voltage, so that the difference between the output voltage of the connected power generation unit and the preset reference voltage is less than or equal to a preset voltage threshold; If the difference between the original voltages of a group of power generation units is less than or equal to a preset error threshold, the group of power generation units share the same regulating unit.

2. The battery control circuit according to claim 1, characterized in that: An original voltage is generated between the positive terminal and the negative terminal of each power generation unit, and an output voltage is generated between the positive output terminal and the negative output terminal of each power generation unit; The battery control circuit also includes a control module; The control module is connected to the regulating unit and the power generation unit, and is configured to generate a plurality of regulating signals and send one regulating signal to one of the regulating units; and obtain the original voltage of each of the power generation units, and adjust the duty cycle of each of the regulating signals based on the voltage difference between the obtained original voltage and the preset reference voltage; The regulating unit is configured to receive and, based on the regulating signal, step down or step up the original voltage of the connected power generation unit so that the difference between the output voltage of the power generation unit and the preset reference voltage is less than or equal to a preset voltage threshold.

3. The battery control circuit according to claim 2, characterized in that: If the original voltage of the power generation unit corresponding to the regulating unit is less than the preset reference voltage, the regulating unit includes a boost chopper Boost circuit; If the original voltage of the power generation unit corresponding to the regulating unit is greater than the preset reference voltage, the regulating unit includes a step-down chopper Buck circuit.

4. The battery control circuit according to claim 3, characterized in that: The Buck circuit includes a first switch, a first diode, a first inductor, and a first capacitor; The gate end of the first switch receives the regulating signal, the first end of the first switch is connected to the positive terminal of the body of the power generation unit, and the second end of the first switch and the output end of the first diode are connected to the first end of the first inductor; The second end of the first inductor and the second end of the first capacitor are both connected to the positive output end of the power generation unit; The negative terminal of the body of the power generation unit, the input end of the first diode, and the first end of the first capacitor are all connected to the negative output end of the power generation unit; The positive output ends of each of the power generation units are connected in parallel, and the negative output ends of each of the power generation units are connected in parallel.

5. The battery control circuit according to claim 3 or 4, characterized in that: The Boost circuit includes a second switch, a second diode, a second inductor, and a second capacitor; The first end of the second inductor is connected to the positive terminal of the power generation unit, the second end of the second inductor and the first end of the second switch are connected to the input end of the second diode, and the output end of the second diode is connected to the positive output end of the power generation unit; the second end of the second switch, the negative terminal of the power generation unit, and the second end of the second capacitor are connected to the negative output end of the power generation unit; the gate end of the second switch receives the adjustment signal; The positive output ends of each of the power generation units are connected in parallel, and the negative output ends of each of the power generation units are connected in parallel.

6. The battery control circuit according to any one of claims 2 to 4, characterized in that: The battery control circuit further comprises a plurality of power point tracking modules, each of which is connected to at least a positive terminal and a negative terminal of a power generation unit; The power point tracking module is configured to track the target power point of the connected power generation unit, and adjust the output parameters of the connected power generation unit based on the tracking result to make it in a target power state.

7. The battery control circuit according to claim 6, characterized in that: If the difference between the original voltages of a group of the power generation units is less than or equal to a preset error threshold, the group of the power generation units share the same power point tracking module.

8. The battery control circuit according to any one of claims 2 to 4, characterized in that: The battery control circuit further includes a plurality of first protection devices and / or a plurality of second protection devices; The first protection device is connected in series between the positive terminal and the positive output terminal of a power generation unit; the first protection device is configured to allow a unidirectional current to flow from the battery body of the power generation unit to the output terminal of the power generation unit; the first protection device is specifically a diode or a triode; The second protection device is connected in series between the positive terminal and the positive output terminal of a power generation unit; the second protection device is configured to control the positive terminal and the positive output terminal of the power generation unit to be in a connection state if the working state of the power generation unit meets the preset conditions; or, if the working state of the power generation unit does not meet the preset conditions, control the positive terminal and the positive output terminal of the power generation unit to be in an open circuit state; wherein the preset conditions at least include that the power of the power generation unit is greater than or equal to a preset power threshold, and the second protection device is specifically a switching device or a transistor.

9. The battery control circuit according to any one of claims 1 to 4, characterized in that: The battery control circuit also includes a communication module; The communication module is configured to collect the operating parameters of the battery control circuit and send the collected operating parameters to the target server.

10. The battery control circuit according to any one of claims 1 to 4, characterized in that: A plurality of the power generation units are used to form a photovoltaic stack assembly for converting absorbed light energy into electrical energy; The photovoltaic stack assembly has an upper surface and a lower surface that are arranged opposite to each other, and a plurality of the power generation units are stacked between the upper surface and the lower surface, and the band gaps of the light absorption layers of the plurality of the power generation units are not completely the same.

11. A battery system, characterized in that: The battery system comprises a plurality of battery control circuits as described in any one of claims 1 to 10, and the plurality of battery control circuits are connected in series and / or in parallel.

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