Battery control circuit and battery system

Abstract

Disclosed in the present disclosure are a battery control circuit and a battery system. The battery control circuit comprises a battery assembly, a first power point tracking module and a first adjustment module. The battery assembly comprises a first power generation unit and a second power generation unit which are connected in parallel; the first power point tracking module is configured to track a target power point of the second power generation unit, and adjust an output parameter of the second power generation unit on the basis of a tracking result, so that an original voltage and an original current of the second power generation unit are in a target power state; and the first adjustment module is configured to acquire a first voltage output by the first power generation unit, and perform step-down or step-up processing on the original voltage of the second power generation unit on the basis of the first voltage, so that the difference between the output voltage of the connected second power generation unit and the first voltage is less than or equal to a preset voltage threshold.

Description

Battery control circuit and battery system

[0001] Cross-reference to related applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202421527785.3, filed on June 28, 2024, entitled “Battery control circuit and battery system”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the field of battery management, and in particular, to a battery control circuit and a battery system. BACKGROUND

[0004] At present, in order to improve the power generation efficiency of the battery, different power generation units are often combined for power supply. Taking a photovoltaic cell as an example, different types of battery components are stacked to form a laminated solar module, which can further improve the existing photovoltaic energy conversion efficiency and reduce the power generation cost by using two or more light-absorbing layers with different band gaps. However, for combined batteries, the electrical parameters of different types of power generation units are different, and the matching of battery versions is difficult. In addition, the power generation conditions of different types of power generation units under different irradiation, different temperatures and different shielding conditions are also different, which may cause the output voltages of different layers of power generation units to be different, and then form a loop between the upper and lower layers of power generation units to generate internal current, causing damage to the laminated solar module. In addition, under different working environments (such as light intensity and temperature), the optimal working point of the battery component is different, which leads to the fact that the power generation units in the battery component do not work at the optimal working point in many scenarios, resulting in low output power and low power generation efficiency. SUMMARY

[0005] The present disclosure proposes a battery control circuit and a battery system, which can improve the mismatch between different power generation units in the battery component and improve the power generation efficiency and battery life.

[0006] The technical solution of the present disclosure is implemented as follows:

[0007] In a first aspect, the embodiments of the present disclosure provide a battery control circuit, the battery control circuit comprising a battery assembly, the battery assembly comprising a first power generation unit and a second power generation unit connected in parallel; the battery control circuit further comprising a first power point tracking module and a first adjustment module; the first power point tracking module is connected with the second power generation unit and is configured to track a target power point of the second power generation unit, and adjust an output parameter of the second power generation unit based on a tracking result, so that an original voltage and an original current of the second power generation unit are in a target power state; the first adjustment module is connected with both the first power generation unit and the second power generation unit, and is configured to obtain a first voltage output by the first power generation unit; and perform voltage step-down or voltage step-up processing on the original voltage of the second power generation unit based on the first voltage, so that a difference between the output voltage of the connected second power generation unit and the first voltage is less than or equal to a preset voltage threshold.

[0008] Through the above technical means, since the first adjustment module can adjust the output voltage of the second power generation unit to be the same as the output voltage of the first power generation unit, the mismatch between different power generation units is eliminated, and the charging efficiency and the battery life are improved; at the same time, since the first power point tracking module can optimize the output parameter of the second power generation unit, the power generation efficiency of the battery assembly is also improved.

[0009] In some embodiments, the first adjustment module comprises a control unit and a first adjustment unit; the control unit is connected with the first power generation unit and the second power generation unit, and is configured to output a first adjustment signal; and adjust a duty cycle of the first adjustment signal based on a voltage difference between the first voltage and the original voltage at the body positive connection terminal and the body negative connection terminal of the second power generation unit; the first adjustment unit is connected with the control unit and the second power generation unit, and is configured to receive the first adjustment signal and perform voltage step-down or voltage step-up processing on the original voltage of the second power generation unit based on the first adjustment signal, so that the output voltage at the positive output terminal and the negative output terminal of the second power generation unit is less than or equal to the first voltage and the preset voltage threshold; wherein the first power point tracking module is connected with the body positive connection terminal and the body negative connection terminal of the second power generation unit, and the first adjustment unit is connected between the body positive connection terminal and the body negative connection terminal of the second power generation unit and the positive output terminal and the negative output terminal of the second power generation unit.

[0010] Through the above technical means, the control unit is used to detect the first power generation unit, and the first adjustment unit is used to step up or step down the second power generation unit, so that the mismatch between different power generation units is eliminated.

[0011] In some embodiments, in the case that the first voltage is greater than the original voltage of the second power generation unit, the first adjustment unit is a boost chopper circuit;

[0012] In the case that the first voltage is less than the original voltage of the second power generation unit, the first adjustment unit is a buck chopper circuit.

[0013] According to the selected first power generation unit, the voltage of the second power generation unit is adjusted by using the Boost circuit or the Buck circuit, so as to meet the requirements of various application scenarios.

[0014] In some embodiments, the Buck circuit comprises a first switch, a first diode, a first inductor, and a first capacitor. The gate of the first switch receives a first adjustment signal. The first end of the first switch is connected to the positive connection end of the body of the second power generation unit. 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 connected to the positive output end of the second power generation unit. The negative connection end of the body of the second power generation unit, the input end of the first diode, and the first end of the first capacitor are connected to the negative output end of the second power generation unit. The positive output end of the first power generation unit and the positive output end of each second power generation unit are connected in parallel. The negative output end of the first power generation unit and the negative output end of each second power generation unit are connected in parallel.

[0015] By controlling the closing / opening time of the first switch, the amplitude of the voltage reduction process is controlled, and the mismatch problem between different power generation units is eliminated.

[0016] In some embodiments, the Boost circuit comprises 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 connection end of the body of the second power generation unit. The second end of the second inductor, the first end of the second switch, and the input end of the second diode are connected. The output end of the second diode is connected to the positive output end of the second power generation unit. The second end of the second switch, the negative connection end of the body of the second power generation unit, and the second end of the second capacitor are connected to the negative output end of the second power generation unit. The gate of the second switch receives the first adjustment signal. The positive output end of the first power generation unit and the positive output end of each second power generation unit are connected in parallel. The negative output end of the first power generation unit and the negative output end of each second power generation unit are connected in parallel.

[0017] By controlling the closing / opening time of the second switch, the amplitude of the voltage reduction process is controlled, and the mismatch problem between different power generation units is eliminated.

[0018] In some embodiments, the battery control circuit further comprises a second power point tracking module connected to the positive connection end and the negative connection end of the body of the first power generation unit. The second power point tracking module is configured to track the target power point of the first power generation unit and adjust the output parameter of the first power generation unit based on the tracking result so that the first power generation unit is in the target power state.

[0019] By means of the above technical means, the second power point tracking module is additionally arranged for the first power generation unit, and the maximum power point can be tracked by using the MPPT tracking technology, so that the output power is improved.

[0020] In some embodiments, the first adjusting module further comprises a first protection device; the first protection device is connected in series between the body positive connection end of the first power generation unit and the positive output end of the first power generation unit, and is configured to allow unidirectional current flow between the battery body of the first power generation unit and the output end of the first power generation unit; and the first protection device is specifically a diode or a triode.

[0021] By means of the above technical means, the first protection device can prevent the second power generation unit from flowing back to the first power generation unit, so that the battery life is improved.

[0022] In some embodiments, the first adjusting module further comprises a second protection device connected in series between the body positive connection end of the first power generation unit and the positive output end of the first power generation unit; the second protection device is configured to control the body positive connection end of the first power generation unit and the positive output end of the first power generation unit to be in a pass-through state if the working state of the first power generation unit meets a preset condition, or to control the body positive connection end of the first power generation unit and the positive output end of the first power generation unit to be in an open circuit state if the working state of the first power generation unit does not meet the preset condition; and the preset condition at least includes that the power of the first 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.

[0023] By means of the above technical means, when the first power generation unit fails or abnormally, the first power generation unit is disconnected, so that no negative impact is brought to the working state of the battery assembly.

[0024] In some embodiments, a plurality of battery control circuits are connected in series; each battery control circuit further comprises a second adjusting module; the second adjusting module is connected with the output end of the battery control circuit, and is configured to receive a second adjusting signal and perform voltage reduction or voltage increase processing on the battery control circuit based on the second adjusting signal, so that the difference between the output currents of the plurality of battery control circuits is less than or equal to a preset current threshold; and the second adjusting module comprises a Buck circuit or a Boost circuit.

[0025] By means of the above technical means, the voltage increase / voltage reduction processing of the second adjusting module on each battery control circuit can make the output voltages of each battery control circuit the same, so that the mismatch problem between different battery control circuits can be eliminated.

[0026] In some embodiments, the battery control circuit further comprises a communication module; the communication module is configured to collect working parameters of the battery control circuit and send the collected working parameters to a target server.

[0027] Through the technical means, the data remote transmission and self-diagnosis processing are realized through the communication module, the working state of the battery control circuit is better monitored, and the working stability of the battery control circuit is improved.

[0028] In some embodiments, the battery assembly is a photovoltaic stacked cell for converting absorbed light energy into electrical energy; the battery assembly has oppositely arranged upper and lower surfaces, and the first and second power generation units are stacked between the upper and lower surfaces, and the light absorption layer band gaps of the first and second power generation units are different.

[0029] Through the technical means, for the photovoltaic stacked cell, the mismatching problem of different cell layers can be well eliminated, and the light absorption layer with different band gaps is used to improve the power generation efficiency.

[0030] In a second aspect, the embodiments of the present disclosure provide a battery system, the battery system comprising a plurality of battery control circuits as in the first aspect, and the plurality of battery control circuits are connected in series.

[0031] The battery control circuit and the battery system provided by the embodiments of the present disclosure, the battery control circuit comprising a battery assembly, a first power point tracking module and a first adjusting module, and the battery assembly comprising a first power generation unit and a second power generation unit, since the first power point tracking module can optimize the output power of the second power generation unit, and the first adjusting module can adjust the output voltage of the second power generation unit to be close to the same as the output voltage of the first power generation unit, not only the power generation efficiency can be improved, but also the mismatching between different power generation units in the battery assembly can be improved, and the battery life can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0032] FIG. 1 is a schematic structural diagram of a power generation unit, a battery assembly and a photovoltaic string;

[0033] FIG. 2 is a schematic structural diagram of a battery control circuit provided by the embodiments of the present disclosure;

[0034] FIG. 3 is a schematic structural diagram of a battery control circuit provided by the embodiments of the present disclosure;

[0035] FIG. 4 is a schematic structural diagram of a battery control circuit provided by the embodiments of the present disclosure;

[0036] FIG. 5 is a schematic structural diagram of a battery control circuit provided by the embodiments of the present disclosure;

[0037] FIG. 6A is a schematic structural diagram of a battery control circuit provided by the embodiments of the present disclosure;

[0038] FIG. 6B is a schematic structural diagram of a battery control circuit provided by the embodiments of the present disclosure;

[0039] Fig. 6C is a schematic diagram of a structure of a battery control circuit according to an embodiment of the present disclosure;

[0040] Fig. 7 is a schematic diagram of a structure of a battery control circuit according to an embodiment of the present disclosure;

[0041] Fig. 8 is a schematic diagram of a connection of a plurality of battery control circuits according to an embodiment of the present disclosure;

[0042] Fig. 9A is a schematic diagram of a structure of a battery assembly according to an embodiment of the present disclosure;

[0043] Fig. 9B is a schematic diagram of a structure of a battery control circuit according to an embodiment of the present disclosure;

[0044] Fig. 10 is a schematic diagram of a flow of a battery control method according to an embodiment of the present disclosure;

[0045] Fig. 11 is a schematic diagram of a flow of a battery control method according to an embodiment of the present disclosure;

[0046] Fig. 12 is a schematic diagram of a structure of a battery system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0047] In order to enable a person skilled in the art to more fully understand the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are only used for reference and are not intended to limit the embodiments of the present disclosure.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terminology used in the specification herein is for describing the embodiments of the present disclosure only and is not intended to limit the present disclosure.

[0049] In the following description, "some embodiments" are described, which describe a subset of all possible embodiments, but 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.

[0050] It should also be noted that the terms "first", "second", "third" used in the embodiments of the present disclosure are only used to distinguish similar objects, and do not represent a specific order of the objects. It can be understood that "first", "second", "third" can be interchanged in a specific order or sequence as allowed, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0051] In addition, in the embodiments of the present disclosure, it also needs to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, and only for the convenience of describing the present disclosure and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the devices or elements indicated must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present disclosure; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0052] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0053] In addition, it should also be understood that when a component is referred to as "on", "connected to", "coupled to" or "contacting" another component, it can be directly on, connected to, coupled to or contacting the other component, or there can be an intervening component. Similarly, when a first component is referred to as "electrically connected", "electrically contacting" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path can include capacitors, coupled inductors and / or other components that allow current to flow, even without direct contact between conductive components.

[0054] Noun explanation:

[0055] PWM (Pulse Width Modulation): a technology for modulating the pulse width of a pulse signal;

[0056] MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor): metal-oxide semiconductor field effect transistor;

[0057] IGBT (Insulate-Gate Bipolar Transistor): Insulated Gate Bipolar Transistor

[0058] DC / DC (Direct Current / Direct Current): Direct Current to Direct Current conversion

[0059] Please refer to FIG. 1 for the meaning of the battery concept referred to in this disclosure:

[0060] (1) Power generation unit

[0061] The power generation unit refers to a basic unit that can realize mutual conversion between other forms of energy and electrical energy, such as a sub-cell composed of a bottom electrode, a semiconductor layer, and a top electrode in a thin-film battery (such as a perovskite battery) (separated and connected in series and parallel by P1, P2, P3 scribing grooves in the preparation process), or a battery piece in a non-thin-film battery (such as a crystalline silicon battery). Generally, the power generation unit will not be independently connected to the positive and negative electrodes, but will be connected in series and parallel to form a power generation unit before being independently connected to the positive and negative electrodes.

[0062] (2) Power generation unit

[0063] Please refer to FIG. 1, the power generation unit refers to the smallest unit with independent positive and negative electrode connection, formed by connecting multiple power generation units in series and parallel, and the specific way of connecting in series and parallel is not limited.

[0064] (3) Battery assembly

[0065] Please refer to FIG. 1, multiple power generation units are stacked to form a battery assembly, FIG. 1 only shows the stacking of 2 power generation units, but the number of stacked power generation units in the battery assembly is not limited. In addition, in this embodiment, the output ends of the stacked power generation units are connected in parallel before being connected to the positive and negative electrodes, that is, each battery assembly is connected to 2 output terminals (i.e. positive output terminal and negative output terminal).

[0066] (4) Photovoltaic string

[0067] Please refer to FIG. 1, multiple battery assemblies are connected in series to form a photovoltaic string.

[0068] Compared with a single-layer component, a stacked solar component (or called stacked photovoltaic cell) can further improve the conversion efficiency of photovoltaic energy and reduce the power generation cost by having two or more light-absorbing layers with different band gaps. For example, for a stacked solar component using a transparent perovskite cell as the upper layer and a crystalline silicon cell as the lower layer, because the electrical parameters of the perovskite cell and the crystalline silicon cell are different, a certain layout design is required to match the two, and the matching requirements for voltage and current are high. In addition, the voltage and current matching both require cutting and series-parallel connection design of the cells, which is difficult for perovskite cells and has a certain impact on the efficiency and stability. In addition, under different irradiation, temperature and shading conditions, the power generation conditions of the upper and lower layers are different, and there is a deviation from the optimal working point, which will cause a certain mismatch loss. For example, because the voltages of the upper and lower layers are different, a loop is formed between the upper and lower layers, causing internal current and damage to the cells.

[0069] In some scenarios, the perovskite cell and the crystalline silicon cell can be used as two independent units to output current and voltage, which can avoid the problem caused by the inconsistency of the photoelectric parameters, but essentially it is still a loop of independent perovskite and crystalline silicon cells, and the working parameters of the system end need to be designed separately, and the advantages of the mechanical stacked component cannot be fully utilized.

[0070] The battery control circuit provided by the embodiments of the present disclosure can solve the above problems. The present disclosure will be further described in detail below with reference to the drawings and specific embodiments.

[0071] In an embodiment of the present disclosure, please refer to FIG. 2, which is a schematic diagram of the composition structure of a battery control circuit 10 provided by an embodiment of the present disclosure. As shown in FIG. 2, the battery control circuit 10 can include a battery component 20, a first adjusting module 30 and a first power point tracking module 40.

[0072] As shown in FIG. 2, the battery component 20 includes a first power generation unit 21 and a second power generation unit 22 connected in parallel; each power generation unit has an independent output voltage, i.e., each power generation unit has an independent output end. In FIG. 2, the output end of the first power generation unit 21 is out0+ / out0-, and the output end of the second power generation unit 22 is out1+ / out1-.

[0073] The first power point tracking module 40 is connected with the second power generation unit 22 and is configured to track the target power point of the second power generation unit 22, and adjust the output parameters of the second power generation unit 22 based on the tracking result, so that the original voltage and the original current of the second power generation unit 22 are in the target power state. The original voltage / current of the second power generation unit 22 refers to the voltage / current between the positive body terminal + and the negative body terminal - of the second power generation unit 22.

[0074] The first regulating module 30 is connected with the first power generation unit 21 and the second power generation unit 22, and is configured to obtain the first voltage output by the first power generation unit 21, and perform voltage reduction or voltage increase on the original voltage of the second power generation unit 22 based on the first voltage, so that the difference between the output voltage of the second power generation unit 22 and the first voltage is less than or equal to a preset voltage threshold. Here, the preset voltage threshold can be selected according to actual needs. The output voltage / output current of the second power generation unit 22 refers to the voltage / current between the positive output end out1+ and the negative output end out1- of the second power generation unit 22.

[0075] It should be noted that the first power generation unit 21 specifically refers to the power generation unit selected as the reference in the battery assembly 20. The second power generation unit 22 refers to other power generation units except the first power generation unit 21, and the number N of the second power generation unit 22 can be any positive integer. Please refer to FIG. 3 or FIG. 4, the plurality of second power generation units are respectively represented as 22_1, 22_2, …, 22_N. The types of different second power generation units are the same or different. “The same type” means that the power generation principle, specific structure, specific material of each structure, and size parameter (within the error allowable range) of the power generation unit are the same.

[0076] Here, “connection” can mean direct connection or indirect connection.

[0077] The power generation unit can be a battery of various types, various materials, and various power generation principles, such as a primary battery, a secondary battery, a photovoltaic battery, a wind energy battery, and the like. Hereinafter, taking the photovoltaic laminated battery as an example, the specific descriptions of several first power generation units 21 and second power generation units 22 are provided.

[0078] Example one, for the battery assembly 20 formed by stacking a crystalline silicon battery and a perovskite battery, since the output voltage of the perovskite battery is higher than that of the crystalline silicon battery, the first power generation unit 21 refers to the crystalline silicon battery, and the second power generation unit 22 refers to the perovskite battery.

[0079] Example two, for the battery assembly 20 formed by stacking a crystalline silicon battery, a perovskite battery, and a copper-indium-gallium-selenium battery, the first power generation unit 21 is the crystalline silicon battery, and the second power generation unit 22 can refer to the perovskite battery and the copper-indium-gallium-selenium battery.

[0080] Example three, for the laminated battery formed by stacking a crystalline silicon battery, a perovskite battery, and a perovskite battery, the first power generation unit 21 refers to the crystalline silicon battery, and the second power generation unit 22 refers to the two perovskite batteries.

[0081] In Example 4, for a stacked battery formed by three stacks of crystalline silicon cells, crystalline silicon cells, and perovskite cells, the first power generation unit 21 refers to one of the crystalline silicon cells, and the second power generation unit 22 refers to the perovskite cell.

[0082] …

[0083] In addition, the battery assembly 20 can also be a combination battery formed by parallel connection of sodium batteries, lithium batteries, etc.

[0084] It should be noted that the target power state can be the maximum power state, i.e., the first power point tracking module 40 is configured to optimize the output parameter of the second power generation unit 22, thereby increasing the output power of the second power generation unit 22. Illustratively, in the absence of the first power point tracking module, assuming that the original current is 2A and the original voltage is 120V, the output power of the second power generation unit 22 is 240W; after setting the first power point tracking module 40, the first power point tracking module 40 changes the output parameter of the second power generation unit 22, so that the original current is 1.8A and the original voltage is 200V, and the output power of the second power generation unit 22 is 360W; thereby optimizing the output power of the second power generation unit 22. The above values are only illustrative and do not constitute relevant limitations or represent actual working conditions.

[0085] In some embodiments, the first power point tracking module 40 is the same as the number of second power generation units 22, and is used to track the target power point of each second power generation unit 22, so as to make it in the target power state.

[0086] In another embodiment, referring to FIG. 4, the number of first power point tracking modules 40 is less than the number of second power generation units 22, and only part of the target power points of the second power generation units are tracked.

[0087] In yet another embodiment, if the difference between the working parameters of a plurality of second power generation units is less than or equal to a preset error threshold, the plurality of second power generation units (e.g., 22_1 and 22_2 in FIG. 4) can share the same first power point tracking module 40.

[0088] It should be noted that the first adjustment module 30 does not change the output power of the second power generation unit 22, i.e., when the first adjustment module 30 performs voltage boosting or voltage reduction processing on the original voltage, the original current will also change synchronously. Illustratively, assuming that the first voltage output by the first power generation unit 21 is 100V, the original current of the second power generation unit 22 is 1.8A and the original voltage is 200V, after adjustment by the first adjustment module 30, the output voltage of the second power generation unit 22 is 100V, and at the same time, the output current is also adjusted to 3.6A, and the power before and after adjustment is 360W.

[0089] In brief, the first power point tracking module 40 can adjust the output power of the second power generation unit, but the first adjusting module 30 does not adjust the output power of the second power generation unit.

[0090] In some embodiments, for example, as shown in FIG. 2 and FIG. 3, the first adjusting module 30 can be configured to adjust the original voltage of each second power generation unit 22.

[0091] In some other embodiments, for example, as shown in FIG. 4, the first adjusting module 30 can be configured to adjust the original voltage of part of the second power generation units 22.

[0092] In this way, in the embodiments of the present disclosure, the first voltage output by the first power generation unit 21 is monitored, and the output voltage of the second power generation unit 22 is adjusted to be almost the same as the output voltage of the first power generation unit 21, so that the output voltages of different power generation units in the battery assembly can be considered to be the same within the error allowable range, and the difficulty of matching the version of the battery assembly is reduced; on the other hand, since the output voltages of different power generation units are almost the same, no loop is formed between different power generation units to generate current, and the service life of the power generation units can also be improved.

[0093] In addition, in the embodiments of the present disclosure, the output power of the second power generation unit is optimized by the first power point tracking module 40, so that the power generation efficiency of the battery assembly 20 can be further improved under the same working condition.

[0094] In some embodiments, referring to FIG. 5, the first adjusting module 30 includes a control unit 31 and a first adjusting unit 32; the control unit 31 is connected with the first power generation unit 21 and the second power generation unit 22, and is configured to output a first adjusting signal Con1; and based on the voltage difference between the first voltage and the original voltage at the body positive connection end + and the body negative connection end - of the second power generation unit 22, the duty cycle of the first adjusting signal Con1 is adjusted;

[0095] The first adjusting unit 32 is connected with the control unit 31 and the second power generation unit 22, and is configured to receive and, based on the first adjusting signal Con1, step down or step up the original voltage of the second power generation unit 22, so that the output voltage at the positive output end out1+ and the negative output end out1- of the second power generation unit 22 is less than or equal to the preset voltage threshold; wherein the first power point tracking module 40 is connected with the body positive connection end + and the body negative connection end - of the second power generation unit 22, and the first adjusting unit 32 is connected between the body positive connection end + and the body negative connection end - of the second power generation unit 22 and the positive output end and the negative output end of the second power generation unit 22.

[0096] In the case where the second power generation units are multiple, the number of the first regulating units is also multiple (denoted as A, A is less than or equal to N. For details, please refer to FIG. 6A, and FIG. 6A omits the second power generation units not connected to the first regulating module 30.

[0097] The i-th first regulating unit 32_i is connected between the body positive connection end, the body negative connection end and the positive output end, the negative output end of the i-th second power generation unit, that is, the first regulating unit 32_1 is connected between the body positive connection end +, the body negative connection end - and the positive output end out1+, the negative output end out1- of the second power generation unit 22_1, the first regulating unit 32_2 is connected between the body positive connection end +, the body negative connection end - and the positive output end out2+, the negative output end out2- of the second power generation unit 22_2, and so on, and the first regulating unit 32_A is connected between the body positive connection end +, the body negative connection end - and the positive output end outA+, the negative output end outA- of the second power generation unit 22_A.

[0098] The control unit 31 is connected to the first power generation unit 21 and the A second power generation units, and the connection of the control unit 31 to the A second power generation units is temporarily omitted in FIG. 6A, which can be understood in combination with the description. The control unit 31 is configured to output A first regulating signals (denoted as Con1, Con2, …, ConA in FIG. 6A); and adjust the duty cycle of the i-th first regulating signal Coni based on the voltage difference between the first voltage and the original voltage of the i-th second power generation unit 22_i; the i-th first regulating unit 32_i is connected to the control unit 31 and the i-th second power generation unit 22_i, and is configured to receive and output a step-down or step-up processing on the i-th second power generation unit 22_i based on the i-th first regulating signal Coni, so that the output voltage of the i-th second power generation unit is less than or equal to the preset voltage threshold value; i is a positive integer less than or equal to A.

[0099] In some embodiments, the difference between the working parameters of the multiple second power generation units is less than or equal to a preset error threshold, and the multiple second power generation units (for example, 22_1, 22_2 in FIG. 4) can share the same first regulating unit.

[0100] In a specific application scenario, the output voltage (i.e., the first voltage) of the first power generation unit is less than the original voltage of the second power generation unit; that is, the power generation unit with a lower original voltage in the battery assembly is selected as the first power generation unit, for example, the crystalline silicon cell in the battery assembly formed by the crystalline silicon cell and the perovskite cell is selected as the first power generation unit.

[0101] Correspondingly, the first adjusting unit can adopt a Buck circuit, specifically a non-isolated DC converter with output voltage ≤ input voltage, to reduce the output voltage of the second generating unit to the first voltage through DC / DC voltage conversion, thereby eliminating the voltage mismatch problem. The specific structure of the Buck chopper circuit is provided below.

[0102] Referring to FIG. 6A, the device types, device quantities, and device connection relationships of different Buck circuits are the same. FIG. 6A only takes one of the Buck circuits as an example for labeling. As shown in FIG. 6A, each Buck circuit includes a first switch 411, a first diode 412, a first inductor 413, and a first capacitor 414.

[0103] The first switch 411 has a gate, a first end, and a second end. The signal of the gate can determine whether the first end and the second end are in a pass-through state or an open circuit state. The gate of the first switch 411 receives a first adjusting signal, i.e., the gate of the first switch in the first adjusting unit 32_1 receives the first first adjusting signal Con1, the gate of the first switch in the first adjusting unit 32_2 receives the second first adjusting signal Con2, and the gate of the first switch in the first adjusting unit 32_A receives the A-th first adjusting signal ConA. The first end of the first switch 411 is connected to the positive terminal + of the body of the second generating unit. The second end of the first switch 411 and the output end of the first diode 412 are connected to the first end of the first inductor 413. The second end of the first inductor 413 and the second end of the first capacitor 414 are connected to the positive output end of the second generating unit. The negative terminal - of the body of the second generating unit, the input end of the first diode 412, and the first end of the first capacitor 414 are connected to the negative output end of the second generating unit.

[0104] The positive output end of the first generating unit 21 and the positive output end of each second generating unit are connected in parallel, i.e., out0+, out1+, out2+, …, outN+ are connected in parallel. The negative output end of the first generating unit 21 and the negative output end of each second generating unit are connected in parallel, i.e., out0-, out1-, out2-, …, outN- are connected in parallel, configured to output the overall output voltage of the battery assembly 20.

[0105] It is worth noting that although the types, quantities, and connection relationships of the components of different Buck circuits are the same, the electrical parameters of the specific components of different first adjusting modules can be different because the output voltages of different second generating units are different, i.e., the voltage reduction requirements of different second generating units can be different. For example, the inductance of the first inductor 413 and the capacitance of the first capacitor 414 in different first adjusting modules can correspond to the same or different values.

[0106] It should be noted that the first switch 411 can adopt various types of switches, such as IGBT transistors, MOSFET transistors, etc., and the duty cycle of the first adjustment signal can control the on / off time of the first switch 411, thereby controlling the amplitude of the voltage reduction.

[0107] In another specific application scenario, the output voltage (i.e., the first voltage) of the first power generation unit is greater than the original voltage of the second power generation unit; that is, the power generation unit with a higher original voltage in the battery assembly is selected as the first power generation unit, for example, the perovskite cell in the battery assembly formed by the crystalline silicon cell and the perovskite cell is selected as the first power generation unit.

[0108] Correspondingly, the first adjustment unit can adopt a boost chopper Boost circuit, which is a non-isolated DC converter with an output voltage ≥ input voltage. The output voltage of the second power generation unit is increased to the first voltage through DC / DC voltage conversion, thereby eliminating the voltage mismatch problem. The specific structure of the Boost circuit is provided below.

[0109] Please refer to FIG. 6B. The device types, device quantities, and device connection relationships of different Boost circuits are the same. FIG. 6B only takes one Boost circuit as an example for labeling. As shown in FIG. 6B, 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 body positive connection end of the second 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, and the output end of the second diode 423 is connected to the positive output end of the second power generation unit; the second end of the second switch 422, the body negative connection end of the second power generation unit, and the second end of the second capacitor 424 are connected to the negative output end of the second power generation unit; the gate end of the second switch 422 receives the first adjustment signal; the signal at the gate end of the second switch 422 determines whether the first end and the second end thereof are in an on state or an off state.

[0110] Similarly, the performance parameters of the same type of devices in different Boost circuits can be different.

[0111] In another specific application scenario, please refer to FIG. 6C. In the case where the output voltage of the first power generation unit is greater than the original voltage of the first part of the second power generation unit (for example, 22_A), and the output voltage of the first power generation unit is less than the original voltage of the second part of the second power generation unit (for example, 22_1 and 22_2), the first adjustment unit (for example, 32_A) connected to the first part of the second power generation unit is a boost chopper Boost circuit, and the first adjustment unit (for example, 32_1 and 32_2) connected to the second part of the second power generation unit is a buck chopper Buck circuit.

[0112] In some embodiments, referring to FIGS. 6A-6C, the first regulating module 30 further comprises a first protection device 33; the first protection device 33 is connected in series between the body positive connection end + of the first power generation unit 21 and the positive output end out0+ of the first power generation unit 21, and is configured to allow unidirectional current flow between the battery body of the first power generation unit 21 and the output end of the first power generation unit 21.

[0113] In this way, through the first protection device 33, the reverse input of current to the first power generation unit 21 can be avoided, and the battery device can be prevented from being damaged. The first protection device 33 can be implemented by a diode or a triode, such as an IGBT transistor or a MOSFET transistor.

[0114] In some embodiments, referring to FIG. 7, the battery control circuit 10 further comprises a second power point tracking module 41 connected with the body positive connection end + and the body negative connection end - of the first power generation unit 21; the second power point tracking module 41 is configured to track a target power point (such as a maximum power point) of the first power generation unit 21, and adjust an output parameter of the first power generation unit 21 based on the tracking result, so that the first power generation unit 21 is in a target power state (such as a maximum power state). The output parameter includes an output current and an output voltage.

[0115] It should be noted that, whether the first power point tracking module 40 or the second power point tracking module 41, an MPPT controller (Maximum Power Point Tracking) can be used, in which an MPPT algorithm and a boost circuit and a buck circuit are independently carried. Exemplarily, the boost circuit can be a Boost circuit, and the buck circuit can be a Buck circuit. The specific working principle 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 characteristic of the power generation unit is at the maximum power point, which is particularly suitable for photovoltaic cells.

[0116] In some embodiments, referring to FIG. 7, the first regulating module 30 further comprises a second protection device 36 connected in series between the body positive connection end + of the first power generation unit 21 and the positive output end out0+ of the first power generation unit 21; the second protection device 36 is configured such that, if the working state of the first power generation unit 21 meets a preset condition, the body positive connection end + of the first power generation unit and the positive output end out0+ of the first power generation unit are in a pass-through state, so that the outputs of all power generation units are effective; if the working state of the first power generation unit 21 does not meet the preset condition, the body positive connection end + of the first power generation unit and the positive output end out0+ of the first power generation unit are in an open circuit state, so that the output of the first power generation unit 21 is invalid, and only the output of the second power generation unit is effective.

[0117] Exemplarily, the second protection device 36 can be a switch device or a triode, and the first protection device 33 and the second protection device 36 can be implemented by the same triode.

[0118] Meanwhile, the first adjusting module 30 is further configured to, in a case where the outputs of all the power generation units are valid, perform voltage step-down or step-up processing on the connected second power generation unit; or in a case where the output of the first power generation unit is invalid, not perform voltage step-down or step-up processing on the connected second power generation unit, and directly transmit the voltage of the body positive connection terminal and the body negative connection terminal of the second power generation unit to form the voltage of the positive output terminal and the negative output terminal.

[0119] It should be noted that the preset condition is used to measure whether the first power generation unit 21 is normally working, for example, the preset condition at least includes that the power of the first power generation unit is greater than or equal to a preset power threshold. That is to say, if the first power generation unit 21 is damaged or has too small power, it can be considered that the first power generation unit 21 is in an abnormal working state, and the first power generation unit 21 is disconnected by using the second protection device 36; meanwhile, the voltage adjustment on the second power generation unit is no longer performed. That is to say, when the second switch 26 is disconnected, the first adjusting signal output by the control unit 31 will make the first switch in the first adjusting module in an always-on state.

[0120] It should be noted that, in FIGS. 6A-6C, the second protection device 36 is closer to the body positive connection terminal + of the first power generation unit 21, and the first protection device 33 is closer to the positive output terminal out0+ of the first power generation unit 21, but this does not constitute a specific limitation, and the positions of the two can be exchanged.

[0121] In some embodiments, referring to FIG. 8, a plurality of battery control circuits 10 are connected in series. At this time, there can be a mismatch problem between different battery control circuits 10. In order to solve this problem, referring to FIG. 7, each battery control circuit 10 further includes a second adjusting module 50; the second adjusting module 50 is connected with the output terminal of the battery control circuit 10, and is configured to receive a second adjusting signal and perform voltage step-down or step-up processing on the battery control circuit 10 based on the second adjusting signal, so that the output currents of the plurality of battery control circuits 10 are the same.

[0122] In this way, the output voltage (i.e., the voltage between out+ and out-) of the battery control circuit 10 can be reduced by the second adjusting module 50, so as to increase the output current of the battery control circuit 10, and finally make the currents of the plurality of battery control circuits 10 the same, thereby improving the mismatch problem between different battery control circuits 10.

[0123] The generation logic of the second adjustment signal is as follows: a reference current is obtained (the reference current can be a self-set output current of the battery control circuit 10 or a selected output current of the battery control circuit 10, in which case the selected battery control circuit 10 does not need to set the second adjustment module 50), and the duty cycle of the second adjustment signal is adjusted based on the difference between the reference current and the original current of the connected battery control circuit 10, so as to increase the output current of the battery control circuit 10 through a step-down process or decrease the output current of the battery control circuit 10 through a step-up process.

[0124] The second adjustment module 50 can also include a Buck circuit or a Boost circuit. For example, FIG. 7 illustrates a connection diagram of the second adjustment module 50 with a Buck circuit, in which case the switch in the Buck circuit receives the second adjustment signal.

[0125] In some embodiments, the battery control circuit 10 further includes a communication module configured to collect the working parameters of the battery control circuit 10 and send the collected working parameters to a target server.

[0126] It should be noted that the communication module can be a programmable logic controller (PLC). The working parameters of the battery control circuit 10 can selectively include but are not limited to the following parameters: the voltage / current between the positive connection end + and the negative connection end - of the body of the first power generation unit 21, the voltage / current between the positive output end out0+ and the negative output end out0-; the voltage / current between the positive connection end + and the negative connection end of the body of the second power generation unit, the voltage / current between the positive output end and the negative output end; the duty cycle of the first adjustment signal, and the duty cycle of the second adjustment signal, so as to realize data remote transmission and performance self-diagnosis alarm.

[0127] Currently, new energy batteries are increasingly widely used in life and industry. 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 bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing. In the embodiment of the present disclosure, the battery can be a power generation unit. The power generation unit refers to a basic unit that can realize mutual conversion between other forms of energy and electrical energy, and can be used to make a battery module or a battery pack, thereby being used to supply power to a power consumption device. The power generation unit can be a secondary battery, which refers to a power generation unit that can be activated by charging after discharging to continue to be used. The power generation unit can 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-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The power generation unit can also be a photovoltaic cell, and the present disclosure is not limited thereto.

[0128] In some embodiments, referring to FIG. 9A, the battery assembly 20 is a photovoltaic laminated battery for converting absorbed light energy into electrical energy; the battery assembly 20 further comprises an upper surface and a lower surface, and the first power generation unit 21 and the second power generation unit 22 are stacked between the upper surface and the lower surface, and the light absorption layer band gaps of the first power generation unit 21 and the second power generation unit are different.

[0129] Here, FIG. 9A takes the first power generation unit 21 as a crystalline silicon battery and the second power generation unit 22 as a perovskite battery as an example to illustrate the stacking structure of the battery assembly 20. Since the light absorption band gap of the perovskite battery is wider, the perovskite battery is located in the upper layer, and the crystalline silicon battery is located in the lower layer, but this does not limit the specific positions of the first power generation unit 21 and the second power generation unit 22. In other embodiments, the perovskite battery in the upper layer can be selected as the first power generation unit 21, and the crystalline silicon battery in the lower layer can be selected as the second power generation unit 22.

[0130] In short, the photovoltaic laminated battery contains two or more power generation units (in this embodiment, the power generation unit can also be referred to as a photovoltaic unit). Different power generation units contain light absorption layers with different band gaps, which can improve the existing photovoltaic energy conversion efficiency and reduce the cost of power generation through light absorption layers with different band gaps.

[0131] Referring to FIG. 9A, the following will be specifically described by taking the battery assembly 20 as an example of a photovoltaic laminated battery formed by stacking two power generation units.

[0132] (1) The power generation unit in the upper layer (front, light-receiving surface) contains a transparent photovoltaic assembly, and the power generation unit in the lower layer can be a transparent photovoltaic assembly or an opaque photovoltaic assembly, a single-sided assembly or a double-sided assembly. The specific design, type and structure of the power generation units in the upper and lower layers are not limited.

[0133] (2) Please see Figure 9A, the upper and lower layers of the power generation unit is packaged between the upper surface and the lower surface, the upper surface is a light-transmitting surface, the lower surface is a light-transmitting surface or a non-light-transmitting surface.

[0134] (3) The upper layer of the power generation unit and the lower layer of the power generation unit is provided with a transparent insulating material layer, which can be a film, glass or other materials.

[0135] (4) Photovoltaic laminated battery needs to be packaged, the packaging form is not limited, the laminated assembly can be assembled or not assembled frame.

[0136] (5) The positive and negative terminals of the upper layer of the power generation unit and the lower layer of the power generation unit are respectively led out, that is, the positive output terminal and the negative output terminal, the leading-out mode is not limited, and the leading-out position is not limited.

[0137] Further, please see Figure 9B, taking the upper layer of the power generation unit as a perovskite battery (specifically the second power generation unit) and the lower layer of the power generation unit (specifically the first power generation unit) as a crystalline silicon battery as an example, a detailed introduction of the first adjustment module 30 in a specific scenario is provided.

[0138] (6) Please see Figure 9B, for the battery assembly 20, the positive terminal of the crystalline silicon battery (i.e. the first power generation unit 21) in it is connected with the first protection device 33 (also called anti-reverse diode), and the output voltage of the battery assembly 20 is monitored at the output end of the first protection device 33 as a reference value.

[0139] (7) Please see Figure 9B, the positive and negative electrodes (i.e. the positive terminal and the negative terminal) of the perovskite battery (i.e. the second power generation unit 22) in the battery assembly 20 are respectively connected with the positive and negative electrodes of the first adjustment unit 32 (specifically a Buck circuit in this embodiment), and after DC / DC conversion, the output voltage is processed by step-down, and the voltage amplitude after step-down is determined by the ratio (i.e. duty ratio) of the opening and closing time of the first switch 411 in the first adjustment unit 32, so that the output voltage of the second power generation unit 22 is equal to the output voltage of the first power generation unit 21 on the right side of the first protection device 33, and the first switch 411 can adopt MOSFET transistor or IGBT transistor.

[0140] (8) The perovskite battery is also configured with an MPPT module (i.e., a first power point tracking module 40), which has an MPPT tracking algorithm. The output current and voltage of the perovskite battery are collected, and a PWM control signal is outputted through algorithm calculation. The DC / DC converter built in the MPPT module is controlled through the PWM control signal, so as to realize the adjustment of the load size and finally realize the maximum power point tracking of the perovskite battery. It should be understood that in other embodiments, the MPPT module (i.e., a second power point tracking module 41) can also be configured for the crystalline silicon battery at the same time, or only for the crystalline silicon battery.

[0141] (9) After the above adjustment, the positive and negative output terminals of the perovskite battery and the crystalline silicon battery with the same output voltage are directly connected in parallel to form a positive output out+ and a negative output out- respectively. The overall output voltage of the parallel battery assembly is equal to the output voltage of the crystalline silicon battery, and the output current is equal to the sum of the output current of the perovskite battery and the output current of the crystalline silicon battery, thereby obviously improving the mismatch problem of the laminated assembly in principle.

[0142] (10) A switch device (i.e., a second protection device 36) can be selected to be connected in series between the positive electrode of the crystalline silicon battery and the first protection device 33, which serves the purpose of selective shutdown. When it is considered that the crystalline silicon battery is abnormal or the overall power is too small through the detection of voltage and current, the second protection device 36 is disconnected. At this time, the power output of the battery assembly is completely provided by the perovskite battery. The output voltage of the first adjustment unit 32 no longer tracks the output voltage of the crystalline silicon battery, but is adjusted to a current tracking mode. The current amplitude can be set to a certain constant reference value, and the current of the entire string remains consistent.

[0143] (11) Please refer to FIG. 8. Multiple battery control circuits 10 are connected in series to form a battery system with a string level. At this time, the output end of the battery control circuit 10 is connected in series with a second adjustment module 50, which is used for overall voltage and current adjustment of the battery control circuit 10. When the battery assembly 20 in the single battery control circuit 10 is partially shaded or affected by other reasons to affect the power output, the second adjustment module 50 is started. The output current of the battery control circuit 10 is increased to the same as the reference current (i.e., the voltage is reduced) through DC / DC conversion, so as to realize the power optimization of the string level.

[0144] (12) The intelligent switch and anti-reverse diode (i.e., the first protection device 33 and the second protection device 36) connected to the crystalline silicon battery can be replaced by (MOSFET or IGBT) to realize the functions of intelligent shutdown and anti-reverse.

[0145] (13) For the battery control circuit 10, a PLC communication module can also be configured to collect the parameters of the battery layer and the overall laminated assembly, realize data remote transmission and abnormal performance self-diagnosis alarm.

[0146] Thus, for the four-terminal stacked assembly formed by the crystalline silicon cell and the perovskite cell, due to the independent occurrence of photovoltaic effect of the perovskite cell and the crystalline silicon cell respectively, different output voltages and currents are generated, such as direct series and parallel output, which will cause a serious mismatch problem and greatly reduce the output power. Since photovoltaic power generation is direct current, if the chopping conversion (DC / DC) can be performed on the independent cell layer, the output voltages of the independent cell layers can be unified, thereby eliminating the parallel mismatch caused by the inconsistent voltages. Based on this, the embodiment of the present disclosure provides a first adjusting module adapted to a battery assembly (such as a photovoltaic stacked cell), which performs voltage conversion of different power generation units by power electronic technology, unifies the output voltages of different power generation units in the battery assembly, eliminates the parallel adaptation problem, and greatly improves the power generation efficiency of the stacked battery assembly.

[0147] In another embodiment of the present disclosure, a battery control method is provided, which is applied to the aforementioned battery assembly 20 including the connected first power generation unit 21 and the second power generation unit.

[0148] Please refer to FIG. 10, which is a flowchart of a battery control method provided by the embodiment of the present disclosure. As shown in FIG. 10, the method includes:

[0149] S61: monitoring the first voltage output by the first power generation unit.

[0150] S62: performing step-down or step-up processing on the second power generation unit based on the first voltage, so that the difference between the output voltage of the second power generation unit and the first voltage is less than or equal to a preset voltage difference.

[0151] In the above process, the method further includes:

[0152] S63: performing target power point tracking on the first power generation unit and / or the second power generation unit, and adjusting the output parameters of the first power generation unit and / or the second power generation unit to make them in the target power output state.

[0153] It should be noted that step S63 has no execution relationship with the aforementioned step S61 and step S62.

[0154] The above battery control method can be realized by the aforementioned battery control circuit 10. In a specific embodiment, for a battery assembly composed of a crystalline silicon cell and a perovskite cell, please refer to FIG. 11, the specific flow of an alternative battery control method is as follows:

[0155] S71: starting.

[0156] S72: monitoring the output voltage of the crystalline silicon cell.

[0157] S73: power point tracking adjustment of perovskite cell.

[0158] Here, S73 can be implemented by the first power point tracking module 40.

[0159] S74: first adjustment module of perovskite cell is started.

[0160] S75: output voltage of perovskite cell is adjusted to be the same as that of crystalline silicon cell.

[0161] S76: output voltage of perovskite cell and output voltage of crystalline silicon cell are output in parallel.

[0162] S77: power point tracking of perovskite cell is performed and real-time adjustment is performed.

[0163] Here, S77 is also implemented by the first power point tracking module 40.

[0164] Here, S72 is equivalent to the aforementioned S61, S73-S74 are equivalent to the aforementioned S62, and S73 and S77 are equivalent to the aforementioned S63.

[0165] The embodiments of the present disclosure provide a power optimization strategy suitable for a battery assembly (e.g., a photovoltaic laminated cell), and by using power electronic technology, the output voltages of different power generation units in the battery assembly are unified by voltage conversion, the parallel adaptation problem is eliminated, and the power generation efficiency of the laminated battery assembly is greatly improved.

[0166] In another embodiment of the present disclosure, referring to FIG. 12, a battery system 80 is provided, which includes a plurality of the aforementioned battery control circuit 10, and the plurality of battery control circuits 10 are connected in series.

[0167] Here, the battery control circuit 10 includes the battery assembly 20, the first adjustment module 30, and the first power point tracking module 40, for the battery control circuit 10, the first adjustment module 30 therein can improve the mismatch problem of the power generation unit in the battery assembly 20, and the first power point tracking module 40 can also improve the output power of the battery assembly 20, thereby improving the power generation efficiency and the service life of the battery control circuit 10.

[0168] The above merely describes the preferred embodiments of the present disclosure and is not used to limit the protection scope of the present disclosure, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

[0169] It should be understood that the description of the above storage medium and device embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details of the storage medium and device embodiments of the present disclosure that are not disclosed, please refer to the description of the method embodiments of the present disclosure for understanding.

[0170] It should be understood that the "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present disclosure. Therefore, "in one embodiment" or "in an embodiment" or "in some embodiments" appearing throughout the specification does 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 disclosure, the size of the sequence number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present disclosure. The sequence number of the above embodiments of the present disclosure is only for description, not representing the advantages or disadvantages of the embodiments. The above description of each embodiment tends to emphasize the differences between each embodiment, and the same or similar parts can be referred to each other, and for the sake of brevity, the text will not be repeated here.

[0171] It should also be noted that in the present disclosure, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0172] The sequence number of the above embodiments of the present disclosure is only for description, not representing the advantages or disadvantages of the embodiments.

[0173] The methods disclosed in several method embodiments provided by the present disclosure can be combined arbitrarily without conflict, to obtain new method embodiments.

[0174] The features disclosed in several product embodiments provided by the present disclosure can be combined arbitrarily without conflict, to obtain new product embodiments.

[0175] The features disclosed in several method or device embodiments provided by the present disclosure can be combined arbitrarily without conflict, to obtain new method embodiments or device embodiments.

[0176] The above merely provides a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

[0177] The above merely provides a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A battery control circuit, the battery control circuit comprising a battery assembly, the battery assembly comprising a first power generation unit and a second power generation unit connected in parallel; The battery control circuit also includes a first power point tracking module and a first adjustment module; The first power point tracking module is connected to the second power generation unit and is configured to track the target power point of the second power generation unit and adjust the output parameters of the second power generation unit based on the tracking result so that the original voltage and original current of the second power generation unit are at the target power state. The first adjustment module is connected to both the first power generation unit and the second power generation unit, and is configured to acquire the first voltage output by the first power generation unit; and to perform voltage reduction or boosting processing on the original voltage of the second power generation unit based on the first voltage, so that the difference between the output voltage of the connected second power generation unit and the first voltage is less than or equal to a preset voltage threshold.

2. The battery control circuit according to claim 1, wherein, The first adjustment module includes a control unit and a first adjustment unit; The control unit is connected to the first power generation unit and the second power generation unit, and is configured to output a first adjustment signal; and to adjust the duty cycle of the first adjustment signal based on the voltage difference between the first voltage and the original voltage at the positive terminal and the negative terminal of the second power generation unit. The first adjustment unit is connected to the control unit and the second power generation unit, and is configured to receive and, based on the first adjustment signal, perform voltage reduction or boosting processing on the original voltage of the second power generation unit so that the output voltage at the positive output terminal and the negative output terminal of the second power generation unit is less than or equal to the first voltage threshold. The first power point tracking module is connected to the positive and negative terminals of the second power generation unit, and the first adjustment unit is connected between the positive and negative terminals of the second power generation unit and the positive and negative output terminals of the second power generation unit.

3. The battery control circuit according to claim 2, wherein, When the first voltage is greater than the original voltage of the second power generation unit, the first adjustment unit is a boost chopper circuit; When the first voltage is less than the original voltage of the second power generation unit, the first regulating unit is a buck circuit.

4. The battery control circuit according to claim 3, wherein, 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 first adjustment signal. The first terminal of the first switch is connected to the positive terminal of the body of the second power generation unit. 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 second power generation unit. The negative terminal of the body of the second 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 second power generation unit. The positive output terminal of the first power generation unit and the positive output terminal of each of the second power generation units are connected in parallel, and the negative output terminal of the first power generation unit and the negative output terminal of each of the second power generation units are connected in parallel.

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

6. The battery control circuit according to any one of claims 2-5, wherein, The battery control circuit also includes a second power point tracking module, which is connected to the positive and negative terminals of the first power generation unit. The second power point tracking module is configured to track the target power point of the first power generation unit and adjust the output parameters of the first power generation unit based on the tracking result so that it is in the target power state.

7. The battery control circuit according to any one of claims 2-6, wherein, The first adjustment module also includes a first protection device; The first protection device is connected in series between the positive terminal of the body of the first power generation unit and the positive output terminal of the first power generation unit, and is configured to allow unidirectional current flow between the battery body of the first power generation unit and the output terminal of the first power generation unit. The first protection device is specifically a diode or a transistor.

8. The battery control circuit according to any one of claims 2-7, wherein, The first adjustment module further includes a second protection device, which is connected in series between the positive terminal of the first power generation unit and the positive output terminal of the first power generation unit. The second protection device is configured to, if the operating state of the first power generation unit meets the preset conditions, control the positive terminal of the body of the first power generation unit and the positive output terminal of the first power generation unit to be in a closed circuit state; or, if the operating state of the first power generation unit does not meet the preset conditions, control the positive terminal of the body of the first power generation unit and the positive output terminal of the first power generation unit to be in an open circuit state. The preset conditions include at least the power of the first power generation unit being 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 1-8, wherein, There are multiple battery control circuits, and the multiple battery control circuits are connected in series. Each of the battery control circuits further includes a second adjustment module; the second adjustment module is connected to the output terminal of the battery control circuit and is configured to receive a second adjustment signal, and perform buck or boost processing on the battery control circuit based on the second adjustment signal, so that the difference between the output currents of the multiple battery control circuits is less than or equal to a preset current threshold. The second adjustment module includes a buck chopper circuit or a boost chopper circuit.

10. The battery control circuit according to any one of claims 1-9, wherein, 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.

11. The battery control circuit according to any one of claims 1-10, wherein, The battery module is a photovoltaic tandem battery, used to convert absorbed light energy into electrical energy; The battery assembly has an upper surface and a lower surface that are arranged opposite to each other, and the first power generation unit and the second power generation unit are stacked between the upper surface and the lower surface. The light absorption layer band gaps of the first power generation unit and the second power generation unit are different.

12. A battery system comprising a plurality of battery control circuits as described in claims 1-11, wherein the plurality of battery control circuits are connected in series.

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