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 battery assembly, a first power point tracking module and a first adjusting module, and 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 based on a tracking result, so that the original voltage and the original current of the second power generation unit are in a target power state; the first adjusting module is configured to obtain a first voltage output by the first power generation unit; and the first voltage is used for carrying out voltage reduction or boosting processing on the original voltage of the second power generation unit based on the first voltage, so that the difference value between the output voltage of the connected second power generation unit and the first voltage is smaller than or equal to the preset voltage threshold, the power generation efficiency can be improved, mismatch between different power generation units in the battery assembly can be improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The present application relates to the field of battery management, and in particular, to a battery control circuit and a battery system. Background Art

[0002] At present, in order to improve the power generation efficiency of batteries, different power generation units are often combined to supply power. Taking photovoltaic cells as an example, stacking different types of battery modules to form a laminated solar module can further improve the existing photovoltaic energy conversion efficiency and reduce the cost of power generation through two or more band gap light absorption layers. However, for combined batteries, different types of power generation units have different electrical parameters, and it is difficult to match the battery version; in addition, different types of power generation units have different power generation conditions under different irradiation, different temperatures, and different shielding conditions, which may lead to different output voltages of power generation units in different layers, and then the upper and lower power generation units form a loop to generate internal current, causing damage to the laminated solar module; in addition, under different working environments (such as light intensity, temperature), the optimal working point of the battery module is different, which leads to the power generation unit in the battery module not working at the optimal working point in many scenarios, resulting in low output power and low power generation efficiency. Utility Model Content

[0003] This application proposes a battery control circuit and a battery system, which can improve the mismatch between different power generation units in a battery assembly, thereby improving power generation efficiency and battery life.

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

[0005] In a first aspect, an embodiment of the present application provides a battery control circuit, which includes a battery assembly, the battery assembly including 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 results so that the original voltage and original current of the second power generation unit are in a 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 obtain a first voltage output by the first power generation unit; and based on the first voltage, the original voltage of the second power generation unit is stepped down or stepped up 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.

[0006] Through the above-mentioned technical means, since the first regulation module can adjust the output voltage of the second power generation unit to 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 battery life are improved; at the same time, since the first power point tracking module can optimize the output parameters of the second power generation unit, the power generation efficiency of the battery assembly can also be improved.

[0007] In some embodiments, the first regulation module includes a control unit and a first regulation 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 regulation signal; and adjust the duty cycle of the first regulation signal based on the voltage difference between the first voltage and the original voltage at the positive terminal and the negative terminal of the body of the second power generation unit; the first regulation unit is connected to the control unit and the second power generation unit, and is configured to receive and, based on the first regulation signal, step down or step up 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 preset voltage threshold with the first voltage; wherein the first power point tracking module is connected to the positive terminal and the negative terminal of the body of the second power generation unit, and the first regulation unit is connected between the positive terminal and the negative terminal of the body of the second power generation unit and the positive output terminal and the negative output terminal of the second power generation unit.

[0008] Through the above technical means, the control unit is used to detect the first power generation unit, and the first regulating unit is used to increase or decrease the voltage of the second power generation unit, thereby eliminating the mismatch between different power generation units.

[0009] In some embodiments, when the first voltage is greater than the original voltage of the second power generation unit, the first regulating unit is a boost chopper Boost circuit;

[0010] In the case that the first voltage is lower than the original voltage of the second power generation unit, the first regulating unit is a step-down chopper Buck circuit.

[0011] Through the above technical means, according to the selected first power generation unit, the voltage adjustment of the second power generation unit is achieved using a Boost circuit or a Buck circuit, which can meet the needs of various application scenarios.

[0012] In some embodiments, 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 a first adjustment signal, the first end of the first switch is connected to the positive terminal 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 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 end of the first diode, and the first end 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 second power generation unit are connected in parallel, and the negative output terminal of the first power generation unit and the negative output terminal of each second power generation unit are connected in parallel.

[0013] By means of the above technical means, the closing / opening time of the first switch is controlled, thereby controlling the amplitude of the voltage reduction process and eliminating the mismatch problem between different power generation units.

[0014] In some embodiments, the boost chopper 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 second 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 second power generation unit; the second end of the second switch, the negative terminal 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 end of the second switch receives a 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, and 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 means of the above technical means, the amplitude of the voltage boosting process is controlled by controlling the closing / opening time of the second switch, thereby eliminating the mismatch problem between different power generation units.

[0016] In some embodiments, the battery control circuit also includes a second power point tracking module, which is connected to the positive terminal and the negative terminal 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 results to make it in a target power state.

[0017] Through the above technical means, a second power point tracking module is additionally provided for the first power generation unit, and the maximum power point thereof can be tracked by using the MPPT tracking technology, thereby increasing its output power.

[0018] In some embodiments, the first regulation 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 to flow between the battery body of the first power generation unit to the output terminal of the first power generation unit; the first protection device is specifically a diode or a transistor.

[0019] Through the above technical means, the first protection device can prevent the backflow from the second power generation unit to the first power generation unit, thereby improving the battery life.

[0020] In some embodiments, the first regulation module also includes a second protection device, which is connected in series between the main 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 control the main positive terminal of the first power generation unit and the positive output terminal of the first power generation unit to be in a connection state if the working state of the first power generation unit meets the preset conditions; or, if the working state of the first power generation unit does not meet the preset conditions, control the main positive terminal of the first power generation unit and the positive output terminal of the first power generation unit to be in an open circuit state; wherein the preset conditions at least include 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 transistor.

[0021] By means of the above technical means, when a failure or abnormality occurs in the first power generation unit, the first power generation unit can be disconnected without causing any negative impact on the working state of the battery assembly.

[0022] In some embodiments, there are multiple battery control circuits, and the multiple battery control circuits are connected in series; each battery control circuit also includes a second regulation module; the second regulation module is connected to the output end of the battery control circuit, and is configured to receive a second regulation signal, and based on the second regulation signal, step down or step up the battery control circuit so that the difference between the output currents of the multiple battery control circuits is less than or equal to a preset current threshold; wherein the second regulation module includes a buck chopper circuit or a boost chopper circuit.

[0023] By adopting the above technical means, the second regulating module performs the step-up / step-down processing on each battery control circuit, so that the output voltage of each battery control circuit is the same, thereby eliminating the mismatch problem between different battery control circuits.

[0024] In some embodiments, the battery control circuit further includes a communication module; the communication module is configured to collect operating parameters of the battery control circuit and send the collected operating parameters to a target server.

[0025] Through the above technical means, data remote transmission and self-diagnosis processing are realized through the communication module, the working status of the battery control circuit is better monitored, and the working stability of the battery control circuit is improved.

[0026] In some embodiments, the cell assembly is a photovoltaic stacked cell for converting absorbed light energy into electrical energy; the cell assembly has an upper surface and a lower surface arranged relative 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, and the band gaps of the light absorption layers of the first power generation unit and the second power generation unit are different.

[0027] Through the above-mentioned technical means, for photovoltaic stacked cells, the mismatch problem of different cell layers can be effectively eliminated, and the power generation efficiency can be improved by utilizing light-absorbing layers with different band gaps.

[0028] In a second aspect, an embodiment of the present application provides a battery system, which includes several battery control circuits as described in the first aspect, and the several battery control circuits are connected in series.

[0029] A battery control circuit and a battery system are provided in an embodiment of the present application. The battery control circuit includes a battery assembly, a first power point tracking module and a first adjustment module, and the battery assembly includes 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 adjustment module can adjust the output voltage of the second power generation unit to be close to the output voltage of the first power generation unit, it can not only improve the power generation efficiency, but also improve the mismatch between different power generation units in the battery assembly and extend the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of power generation unit, battery assembly and photovoltaic string;

[0031] Figure 2 A schematic diagram of the structure of a battery control circuit provided in an embodiment of the present application Figure 1 ;

[0032] Figure 3 A schematic diagram of the structure of a battery control circuit provided in an embodiment of the present application Figure 2 ;

[0033] Figure 4 A schematic diagram of the structure of a battery control circuit provided in an embodiment of the present application Figure 3 ;

[0034] Figure 5 A schematic diagram of the structure of a battery control circuit provided in an embodiment of the present application Figure 4 ;

[0035] Figure 6A A schematic diagram of the structure of a battery control circuit provided in an embodiment of the present application Figure 5 ;

[0036] Figure 6B Schematic diagram 6 of the composition structure of a battery control circuit provided in an embodiment of the present application;

[0037] Figure 6C A schematic diagram of the structure of a battery control circuit provided in an embodiment of the present application Figure 7 ;

[0038] Figure 7 A schematic diagram of the structure of a battery control circuit provided in an embodiment of the present application Figure 8 ;

[0039] Figure 8 A schematic diagram showing the connection of multiple battery control circuits provided in an embodiment of the present application;

[0040] Figure 9A A schematic diagram of the structure of a battery assembly provided in an embodiment of the present application;

[0041] Figure 9B Schematic diagram 9 of the composition structure of a battery control circuit provided in an embodiment of the present application;

[0042] Figure 10 A schematic diagram of a battery control method provided in an embodiment of the present application Figure 1 ;

[0043] Figure 11 A schematic diagram of a battery control method provided in an embodiment of the present application Figure 2 ;

[0044] Figure 12 A schematic diagram of the structure of a battery system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0047] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0048] It should also be pointed out that the terms "first\second\third" involved in the embodiments of the present application are only used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0049] In addition, in the embodiments of the present application, it is also necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the accompanying drawings. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the accompanying drawings. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0051] Furthermore, it should be understood that when a component is referred to as being "on," "connected to," "coupled to," or "contacting" another component, it can be directly on, connected to, coupled to, or contacting the other component, or intervening components may be present. Similarly, when a first component is referred to as being "electrically connected to," "electrically contacting," or "electrically coupled to" a second component, an electrical path exists between the first and second components that allows current to flow. This electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even without direct contact between the conductive components.

[0052] Glossary:

[0053] PWM (Pulse Width Modulation): A technique for modulating the pulse width of a pulse signal.

[0054] MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor): Metal-Oxide Semiconductor Field-Effect Transistor;

[0055] IGBT (Insulate-Gate Bipolar Transistor): Insulated Gate Bipolar Transistor;

[0056] DC / DC (Direct Current / Direct Current): DC to DC conversion.

[0057] See Figure 1 , the meaning of the battery concept involved in this application is explained:

[0058] (1) Electronic unit

[0059] The electric power unit is a basic unit that can realize the mutual conversion between other forms of energy and electrical energy, such as thin film A subcell (e.g. a perovskite cell) consisting of a bottom electrode, a semiconductor layer, and a top electrode (through the preparation process) The P1, P2, P3 grooves are used to separate and connect in series and parallel), or the cells in non-thin-film cells (such as crystalline silicon cells). For example, the electronic unit will not have independent positive and negative leads, but will be connected in series and parallel ( Figure 1 Only sub-cells of perovskite cells The full series structure is shown as an example, but it does not constitute a relevant limitation) to form a power generation unit and then conduct independent positive and negative electrode induction. out.

[0060] (2) Power generation unit

[0061] See Figure 1 The power generation unit is the smallest unit with independent positive and negative poles, which is composed of multiple power generation units. The elements are connected in series and in parallel, and the specific method of series and parallel connection is not limited.

[0062] (3) Battery components

[0063] See Figure 1 , multiple power generation units are stacked to form a battery assembly, Figure 1 Only two power generation units are stacked for demonstration However, the number of power generation units stacked in the battery assembly is not limited. In addition, in this embodiment, the output of the stacked power generation units is After the terminals are connected in parallel, the positive and negative electrodes are led out, that is, each battery component leads to two output terminals (i.e. positive output terminal, negative output terminal son).

[0064] (4) Photovoltaic strings

[0065] See Figure 1 , multiple battery modules are connected in series to form a photovoltaic string.

[0066] Compared with single-layer modules, stacked solar modules (or stacked photovoltaic cells) can further improve the conversion efficiency of photovoltaic energy and reduce the cost of power generation by having two or more light-absorbing layers with different band gaps. For example, for stacked solar modules with transparent perovskite cells on the upper layer and crystalline silicon cells on the lower layer, due to the different electrical parameters of perovskite cells and crystalline silicon cells, a certain version design is required for matching, and the matching requirements for voltage or current are high. Moreover, the matching of voltage and current requires the cells to be cut and designed in series and parallel. For perovskite cells, it is currently more difficult and has a certain impact on efficiency and stability. In addition, different types of photovoltaic cells have different power generation conditions under different irradiation, different temperatures, and different shielding conditions. There is a deviation in the optimal working point, which will lead to a certain mismatch loss. For example, due to the different voltages of the power generation units on the upper and lower layers, the power generation units on the upper and lower layers form a loop to generate internal current, causing damage to the battery.

[0067] In some scenarios, perovskite cells and crystalline silicon cells can be used as two independent units to draw current and voltage respectively. Although this can avoid the problems caused by inconsistent photoelectric parameters, they are essentially still independent perovskite and crystalline silicon cell circuits. The operating parameters of the system end need to be designed separately, and the advantages of mechanical stacking components cannot be fully utilized.

[0068] The battery control circuit provided in the embodiment of the present application can solve the above problems. The present application will be further described in detail below through the accompanying drawings and specific embodiments.

[0069] In one embodiment of this application, see Figure 2 , which is a schematic diagram of the composition structure of a battery control circuit 10 provided in an embodiment of the present application Figure 1 .like Figure 2 As shown, the battery control circuit 10 may include a battery assembly 20 , a first regulation module 30 and a first power point tracking module 40 .

[0070] like Figure 2 As shown, the battery assembly 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, that is, each power generation unit has an independent output terminal. Figure 2 In the embodiment, 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-.

[0071] The first power point tracking module 40 is connected to 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 results so that the original voltage and original current of the second power generation unit 22 are in the target power state; the original voltage / original current of the second power generation unit 22 refers to the voltage / current between the positive terminal + and the negative terminal - of the second power generation unit 22.

[0072] The first regulating module 30 is connected to both 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, based on the first voltage, to step down or step up the original voltage of the second power generation unit 22, 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. The preset voltage threshold can be selected based on actual needs. The output voltage / output current of the second power generation unit 22 refers to the voltage / current between the positive output terminal out1+ and the negative output terminal out1- of the second power generation unit 22.

[0073] 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 the power generation unit other than the first power generation unit 21, and the number N of the second power generation units 22 can be any positive integer. Figure 3 or Figure 4 , multiple second power generation units are respectively represented as 22_1, 22_2, ..., 22_N). Different second power generation units may be of the same or different types. "Same type" means that the power generation principle, specific structure, specific material of each structure, and dimensional parameters (within an allowable error range) of the power generation units are the same.

[0074] Here, "connected" may mean directly connected or indirectly connected.

[0075] The power generation unit can be a battery of various types, various materials, and various power generation principles, such as primary batteries, secondary batteries, photovoltaic cells, wind power batteries... The following takes the battery component as a photovoltaic stacked battery as an example to provide specific descriptions of several first power generation units 21 and second power generation units 22.

[0076] Example 1: For a battery assembly 20 formed by stacking crystalline silicon cells and perovskite cells, since the output voltage of the perovskite cell is higher than that of the crystalline silicon cell, the first power generation unit 21 refers to the crystalline silicon cell and the second power generation unit 22 refers to the perovskite cell.

[0077] Example 2: For a battery assembly 20 formed by stacking crystalline silicon cells, perovskite cells, and copper indium gallium selenide cells, the first power generation unit 21 is a crystalline silicon cell, and the second power generation unit 22 can refer to a perovskite cell and a copper indium gallium selenide cell.

[0078] Example 3: For a stacked battery formed by stacking a crystalline silicon battery, a perovskite battery, and a perovskite battery, the first power generation unit 21 refers to a crystalline silicon battery, and the second power generation unit 22 refers to two perovskite batteries.

[0079] Example 4: For a stacked battery formed by stacking a crystalline silicon battery, a crystalline silicon battery, and a perovskite battery, the first power generation unit 21 refers to one of the crystalline silicon batteries, and the second power generation unit 22 refers to the perovskite battery.

[0080] …

[0081] In addition, the battery assembly 20 may also be a battery assembly formed by connecting sodium batteries, lithium batteries, etc. in parallel.

[0082] It should be noted that the target power state can be a maximum power state, that is, the first power point tracking module 40 is used to optimize the output parameters of the second power generation unit 22, thereby increasing the output power of the second power generation unit 22. For example, in the absence of the first power point tracking module, assuming its original current is 2A and its original voltage is 120V, the output power of the second power generation unit 22 is 240W; after the first power point tracking module 40 is provided, the first power point tracking module 40 changes the output parameters of the second power generation unit 22 to 1.8A and its 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 for illustrative purposes only and do not constitute relevant limitations or represent actual operating conditions.

[0083] In some embodiments, the number of the first power point tracking modules 40 is the same as the number of the second power generation units 22 , and the first power point tracking modules 40 are used to track the target power point of each second power generation unit 22 in a one-to-one correspondence so as to keep the second power generation unit 22 in a target power state.

[0084] In other embodiments, see Figure 4 The number of the first power point tracking modules 40 is smaller than the number of the second power generation units 22 , and only the target power points of some of the second power generation units are tracked.

[0085] In some other embodiments, if the difference between the operating parameters of the plurality of second power generation units is less than or equal to a preset error threshold, the plurality of second power generation units (eg Figure 4 22_1 and 22_2) can share the same first power point tracking module 40.

[0086] It should be noted that the first regulation module 30 does not change the output power of the second power generation unit 22. That is, when the first regulation module 30 steps up or down the original voltage, the original current will also change synchronously. For example, assuming 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 regulation by the first regulation module 30, the output voltage of the second power generation unit 22 is 100V, and its output current is also adjusted to 3.6A. The power before and after regulation is 360W.

[0087] In short, the first power point tracking module 40 can adjust the output power of the second power generation unit, but the first regulating module 30 does not adjust the output power of the second power generation unit.

[0088] In some embodiments, for example Figure 2 and Figure 3 The first regulating module 30 can be used to regulate the original voltage of each second power generation unit 22 .

[0089] In other embodiments, for example Figure 4 The first regulating module 30 can be used to regulate the original voltage of part of the second power generation unit 22.

[0090] In this way, in the embodiment of the present application, 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 allowable error range, and the difficulty of matching the battery assembly is reduced; 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 life of the power generation unit can also be improved.

[0091] In addition, the embodiment of the present application further optimizes the output power of the second power generation unit through the first power point tracking module 40, thereby further improving the power generation efficiency of the battery assembly 20 under the same working conditions.

[0092] In some embodiments, see Figure 5 The first regulating module 30 includes a control unit 31 and a first regulating unit 32; the control unit 31 is connected to the first power generation unit 21 and the second power generation unit 22, and is configured to output a first regulating signal Con1; and adjust the duty cycle of the first regulating signal Con1 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 22;

[0093] The first regulating unit 32 is connected to the control unit 31 and the second power generation unit 22, and is configured to receive and, based on the first regulating 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 terminal out1+ and the negative output terminal out1- of the second power generation unit 22 and the first voltage are less than or equal to a preset voltage threshold; wherein, the first power point tracking module 40 is connected to the main body positive terminal + and the main body negative terminal - of the second power generation unit 22, and the first regulating unit 32 is connected between the main body positive terminal + and the main body negative terminal - of the second power generation unit 22 and the positive output terminal and the negative output terminal of the second power generation unit 22.

[0094] In the case where there are multiple second power generation units, the number of first regulating units is also multiple (denoted as A, where A is less than or equal to N). For details, please refer to Figure 6A ,and Figure 6A The second power generation unit not connected to the first regulating module 30 is omitted.

[0095] The i-th first regulating unit 32_i is connected between the body positive terminal, body negative terminal and positive terminal, negative output terminal of the i-th second power generation unit, that is, the first regulating unit 32_1 is connected between the body positive terminal +, body negative terminal - and the positive output terminal out1+, negative output terminal out1- of the second power generation unit 22_1, the first regulating unit 32_2 is connected between the body positive terminal +, body negative terminal - and the positive output terminal out2+, negative output terminal out2- of the second power generation unit 22_2... The first regulating unit 32_A is connected between the body positive terminal +, body negative terminal - and the positive output terminal outA+, negative output terminal outA- of the second power generation unit 22_A.

[0096] The control unit 31 is connected to the first power generation unit 21 and the A second power generation units. Figure 6A The connection between the control unit 31 and the A second power generation units is temporarily omitted. Please understand it in conjunction with the text. The control unit 31 is configured to output A first adjustment signals (at Figure 6A Con1, Con2...ConA); and based on the voltage difference between the first voltage and the original voltage of the i-th second power generation unit 22_i, the duty cycle of the i-th first regulation signal Coni is adjusted; the i-th first regulation 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, based on the i-th first regulation signal Coni, perform output voltage reduction or voltage increase processing on the i-th second power generation unit 22_i, so that the output voltage of the i-th second power generation unit and the first voltage are less than or equal to a preset voltage threshold; i is a positive integer less than or equal to A.

[0097] In some embodiments, if the difference between the operating parameters of the plurality of second power generation units is less than or equal to a preset error threshold, the plurality of second power generation units (eg Figure 4 22_1 and 22_2) can share the same first adjustment unit.

[0098] In a specific application scenario, the output voltage of the first power generation unit (i.e., the first voltage) is lower 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.

[0099] Accordingly, the first regulating unit can adopt a step-down chopper Buck circuit, specifically a non-isolated DC converter with an output voltage ≤ input voltage. The output voltage of the second power generation unit is reduced 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.

[0100] See Figure 6A , the device type, device quantity and device connection relationship of different Buck circuits are the same. Figure 6A Only one Buck circuit is used as an example for marking. Figure 6A As shown, each Buck circuit includes a first switch 411 , a first diode 412 , a first inductor 413 , and a first capacitor 414 .

[0101] The first switch 411 has a gate terminal, a first terminal, and a second terminal. A signal at the gate terminal determines whether the circuit between the first terminal and the second terminal is open or closed. The gate terminal of the first switch 411 receives a first regulation signal. Specifically, the gate terminal of the first switch in the first regulation unit 32_1 receives the first first regulation signal Con1, the gate terminal of the first switch in the first regulation unit 32_2 receives the second first regulation signal Con2, and the gate terminal of the first switch in the first regulation unit 32_A receives the Ath first regulation signal ConA. The first terminal of the first switch 411 is connected to the positive terminal + of the second power generation unit. 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 of the second power generation unit. The negative terminal - of the second 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 of the second power generation unit.

[0102] The positive output end of the first power generation unit 21 is connected in parallel with the positive output end of each second power generation unit, that is, out0+, out1+, out2+...outN+ are connected in parallel, and the negative output end of the first power generation unit 21 is connected in parallel with the negative output end of each second power generation unit, that is, out0-, out1-, out2-...outN- are connected in parallel, for outputting the overall output voltage of the battery assembly 20.

[0103] It is worth noting that although the types, quantities and connection relationships of components in different Buck circuits are the same, since the output voltages of different second power generation units are different, that is, the step-down requirements of different second power generation units may be different, the electrical parameters of the specific components of different first regulation modules may be different. For example, the inductance of the first inductor 413 and the capacity of the first capacitor 414 in different first regulation modules may be the same or different.

[0104] 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 first adjustment signal can control the on / off time of the first switch 411, thereby controlling the amplitude of the voltage reduction.

[0105] In another specific application scenario, the output voltage of the first power generation unit (i.e., the first voltage) 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.

[0106] Accordingly, the first regulating unit can adopt a boost chopper Boost circuit, specifically a non-isolated DC converter with an output voltage ≥ input voltage, which increases the output voltage of the second power generation unit 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.

[0107] See Figure 6B , the device type, device quantity and device connection relationship of different Boost circuits are the same. Figure 6B Only one of the Boost circuits is used as an example for marking. Figure 6BAs shown, each Boost circuit 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 second power generation unit, the second end of the second inductor 421 and the first end of the second switch 422 are connected to the input end of the second diode 423, 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 negative terminal 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 regulation signal; the gate end signal of the second switch 422 determines whether the circuit between its first end and the second end is open or closed.

[0108] Similarly, the performance parameters of the same device in different Boost circuits can be different.

[0109] In another specific application scenario, see Figure 6C When the output voltage of the first power generation unit is greater than the original voltage of the second power generation unit (for example, 22_A) of the first part, and the output voltage of the first power generation unit is less than the original voltage of the second power generation unit (for example, 22_1, 22_2) of the second part, the first regulating unit (for example, 32_A) connected to the second power generation unit of the first part is specifically a boost chopper Boost circuit, and the first regulating unit (for example, 32_1, 32_2) connected to the second power generation unit of the second part is specifically a buck chopper Buck circuit.

[0110] In some embodiments, see Figures 6A to 6C The first regulating module 30 also includes a first protective device 33; the first protective device 33 is connected in series to the positive terminal + of the body of the first power generation unit 21 and the positive output terminal out0+ of the first power generation unit 21, and is configured to allow unidirectional current to flow between the battery body of the first power generation unit 21 and the output terminal of the first power generation unit 21.

[0111] In this way, the first protection device 33 can prevent the current from being reversely input to the first power generation unit 21, thereby avoiding damage to the battery device. The first protection device 33 can be implemented by a diode or a transistor, such as an IGBT transistor or a MOSFET transistor.

[0112] In some embodiments, see Figure 7The battery control circuit 10 further includes a second power point tracking module 34 connected to the positive terminal + and the negative terminal - of the first power generation unit 21. The second power point tracking module 34 is configured to track the target power point (e.g., maximum power point) of the first power generation unit 21 and adjust the output parameters of the first power generation unit 21 based on the tracking results to maintain the target power state (e.g., maximum power state). The output parameters include output current and output voltage.

[0113] It should be noted that both the first power point tracking module 40 and the second power point tracking module 41 can use an MPPT controller (Maximum Power Point Tracking) time, which independently carries an MPPT algorithm and a boost and buck circuit. For example, 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 characteristics of the power generation unit are at the maximum power point. It is particularly suitable for photovoltaic cells.

[0114] In some embodiments, see Figure 7 The first regulating module 30 also includes a second protective device 36, which is connected in series between the main positive terminal + of the first power generation unit 21 and the positive output terminal out0+ of the first power generation unit 21; the second protective device 36 is configured so that if the working state of the first power generation unit 21 meets the preset conditions, the main positive terminal + of the first power generation unit and the positive output terminal out0+ of the first power generation unit are in a connection state, so that the outputs of all power generation units are valid; if the working state of the first power generation unit 21 does not meet the preset conditions, the main positive terminal + of the first power generation unit and the positive output terminal 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 valid.

[0115] Exemplarily, the second protection device 36 may be a switch device or a transistor, and the first protection device 33 and the second protection device 36 may be implemented by the same transistor.

[0116] At the same time, the first regulating module 30 is also configured to, when the outputs of all power generation units are valid, perform step-down or step-up processing on the connected second power generation unit; or, when the output of the first power generation unit is invalid, not perform step-down or step-up processing on the connected second power generation unit, and directly transmit the voltage of the second power generation unit's main body positive terminal and main body negative terminal to form the voltage of its positive and negative output terminals.

[0117] It should be noted that the preset condition is used to measure whether the first power generation unit 21 is functioning properly. For example, the preset condition includes at least the first power generation unit's power being greater than or equal to a preset power threshold. In other words, if the first power generation unit 21 is damaged or its power is too low, it can be considered to be in an abnormal operating state. The second protective device 36 will disconnect the first power generation unit 21, and voltage regulation of the second power generation unit will cease. In other words, when the second switch 26 is disconnected, the first regulation signal output by the control unit 31 will cause the first switch in the first regulation module to remain in a normally open state.

[0118] It should be noted that in Figures 6A to 6C In the embodiment, the second protection device 36 is closer to the main positive 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.

[0119] In some embodiments, see Figure 8 , there are multiple battery control circuits 10, and the multiple battery control circuits 10 are connected in series. In this case, there may also be mismatch problems between different battery control circuits 10. To solve this problem, please refer to Figure 7 Each battery control circuit 10 further includes a second regulating module 50; the second regulating module 50 is connected to the output end of the battery control circuit 10 and is configured to receive a second regulating signal and perform a voltage reduction or voltage increase processing on the battery control circuit 10 based on the second regulating signal so that the output currents of the multiple battery control circuits 10 are the same.

[0120] In this way, the output voltage of the battery control circuit 10 (i.e., the voltage between out+ and out-) can be reduced by the second regulation module 50, thereby increasing the output current of the battery control circuit 10, and ultimately making the currents of multiple battery control circuits 10 the same, thereby improving the mismatch problem between different battery control circuits 10.

[0121] Here, the logic for generating the second adjustment signal is: obtaining a reference current (the reference current can be self-set or the output current of a selected battery control circuit 10. In this case, the selected battery control circuit 10 does not need to set up a second adjustment module 50), and adjusting the duty cycle of the second adjustment signal based on the difference between the reference current and the original current of the connected battery control circuit 10, thereby increasing the output current of the battery control circuit 10 through a step-down process, or reducing the output current of the battery control circuit 10 through a step-up process.

[0122] The second regulating module 50 may also include a Buck circuit or a Boost circuit. Figure 7, which takes the Buck circuit as an example to illustrate a connection diagram of the second regulation module 50, where the switch in the Buck circuit receives the second regulation signal.

[0123] In some embodiments, the battery control circuit 10 further includes a communication module; the communication module is configured to collect operating parameters of the battery control circuit 10 and send the collected operating parameters to a target server.

[0124] It should be noted that the communication module can adopt a programmable logic controller (PLC). The operating parameter selectivity of the battery control circuit 10 includes but is not limited to the following parameters: the voltage / current between the positive terminal + and the negative terminal - of the first power generation unit 21, and 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 second power generation unit, and the voltage / current between the positive output terminal and the negative output terminal; the duty cycle of the first adjustment signal and the duty cycle of the second adjustment signal, thereby realizing remote data transmission and performance self-diagnosis alarm.

[0125] At present, the application of new energy batteries in life and industry is becoming more and more extensive. New energy batteries are not only used in energy storage power supply systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as in aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding. In the embodiment of the present application, the battery can be a power generation unit. The power generation unit refers to a basic unit that can realize the mutual conversion of other forms of energy and electrical energy, which can be used to make battery modules or battery packs, thereby being used to supply power to electrical devices. The power generation unit can be a secondary battery, which refers to a power generation unit that can continue to be used by activating the active material by charging after the power generation unit is discharged. 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, which is not limited in the embodiment of the present application.

[0126] In some embodiments, see Figure 9A The battery assembly 20 is a photovoltaic laminated battery for converting absorbed light energy into electrical energy; the battery assembly 20 also includes 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.

[0127] Here, Figure 9AThe stacking structure of the battery assembly 20 is illustrated by taking the first power generation unit 21 as a crystalline silicon cell and the second power generation unit 22 as a perovskite cell as an example. Since the perovskite cell has a wider absorption band gap, the perovskite cell is located in the upper layer and the crystalline silicon cell is located in the lower layer. However, 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 cell in the upper layer can also be selected as the first power generation unit 21, and the crystalline silicon cell in the lower layer can be selected as the second power generation unit 22.

[0128] Simply put, a photovoltaic tandem cell consists of two or more power generation units (in this embodiment, the power generation unit may also be referred to as a photovoltaic unit). Different power generation units contain light absorbing layers with different band gaps. Using light absorbing layers with different band gaps improves the existing photovoltaic energy conversion efficiency and reduces the cost of power generation.

[0129] See Figure 9A The following is a detailed description using an example in which the battery assembly 20 is a photovoltaic laminate battery formed by stacking two power generation units.

[0130] (1) The power generation unit located on the upper layer (front side, facing the light) includes a transparent photovoltaic module, and the power generation unit located on the lower layer can be a transparent photovoltaic module or an opaque photovoltaic module, a single-sided module or a double-sided module. The specific design, type, and structure of the power generation units on the upper and lower layers are not restricted.

[0131] (2) Please see Figure 9A 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.

[0132] (3) A transparent insulating material layer is provided between the upper power generation unit and the lower power generation unit, which can be made of film, glass or other materials.

[0133] (4) Photovoltaic laminated cells need to be encapsulated. The encapsulation form is not limited, and the laminated components can be equipped with or without frames.

[0134] (5) The positive and negative terminals of the upper power generation unit and the lower power generation unit are connected to the positive output terminal and the negative output terminal respectively. The connection method and the connection position are not limited.

[0135] For further information, see Figure 9B Taking the upper power generation unit as a perovskite battery (specifically the second power generation unit) and the lower power generation unit (specifically the first power generation unit) as an example, a detailed introduction to the first adjustment module 30 in a specific scenario is provided.

[0136] (6) See Figure 9BFor the battery assembly 20, the positive terminal of the crystalline silicon cell (i.e., the first power generation unit 21) is connected to the first protection device 33 (also known as an anti-reverse diode), and voltage monitoring is performed at the output end of the first protection device 33 as the reference value of the output voltage of the battery assembly 20.

[0137] (7) See Figure 9B The positive and negative electrodes (i.e., the main body positive terminal + and the main body negative terminal -) of the perovskite battery (i.e., the second power generation unit 22) in the battery assembly 20 are respectively connected to the positive and negative electrodes of the first regulating unit 32 (specifically, the Buck circuit in this embodiment), and the output voltage is stepped down after DC / DC conversion. The voltage amplitude after step-down is determined by controlling the ratio of the on-off time (i.e., the duty cycle) of the first switch 411 in the first regulating unit 32, so that the amplitude of 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. The first switch 411 can adopt a MOSFET transistor or an IGBT transistor.

[0138] (8) The perovskite cell is also equipped with an MPPT module (i.e., the first power point tracking module 40) with a built-in MPPT tracking algorithm. By collecting the output current and voltage of the perovskite cell and calculating the output PWM control signal through the algorithm, the DC / DC converter built into the MPPT module is controlled by the PWM control signal, thereby adjusting the load size and ultimately achieving maximum power point tracking of the perovskite cell. It should be understood that in other embodiments, the MPPT module (i.e., the second power point tracking module 41) can also be configured for the crystalline silicon cell at the same time, or the MPPT module can be configured only for the crystalline silicon cell.

[0139] (9) After the above adjustments, the positive and negative output terminals of the perovskite cell and the crystalline silicon cell 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 cell, and the output current is equal to the sum of the output current of the perovskite cell and the output current of the crystalline silicon cell, thereby significantly improving the mismatch problem in the principle of the stacked assembly.

[0140] (10) A switching device (i.e., the second protection device 36) can be optionally connected in series between the positive electrode of the crystalline silicon cell and the first protection device 33 to achieve the purpose of selective shutdown. When the voltage and current detection indicates that the crystalline silicon cell is abnormal or the overall power is too low, the second protection device 36 is disconnected. At this time, the power output of the battery assembly is completely provided by the perovskite cell. The output voltage of the first adjustment unit 32 no longer tracks the output voltage of the crystalline silicon cell, but is adjusted to a current tracking mode. The current amplitude can be set to a constant reference value, and the current of the entire string remains consistent.

[0141] (11) See Figure 8 Multiple battery control circuits 10 are connected in series to form a string-level battery system. At this point, the output end of the battery control circuit 10 is further connected in series with a second regulation module 50 for regulating the overall voltage and current of the battery control circuit 10. When a battery assembly 20 in a single battery control circuit 10 is partially shaded or otherwise impacts power output, the second regulation module 50 activates and, through DC / DC conversion, increases the output current of that battery control circuit 10 to the same level as the reference current (i.e., a voltage drop), thereby achieving string-level power optimization.

[0142] (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 with (MOSFET or IGBT) to achieve the functions of intelligent shutdown and anti-reverse.

[0143] (13) The battery control circuit 10 may also be configured with a PLC communication module to collect parameters of the battery layer and the entire stack assembly, thereby enabling remote data transmission and self-diagnosis and alarming of abnormal performance.

[0144] In this way, for the four-terminal stacked components formed by crystalline silicon cells and perovskite cells, since the perovskite cells and crystalline silicon cells independently produce photovoltaic effects, different output voltages and currents are generated. If they are directly output in series and parallel, serious mismatch problems will occur, greatly reducing the output power. Since photovoltaic power generation is direct current, if chopping conversion (DC / DC) can be performed on independent battery layers, the output voltages of the independent battery layers can be unified, thereby eliminating the parallel mismatch caused by voltage inconsistency. Based on this, the embodiment of the present application provides a first regulation module adapted to battery assemblies (such as photovoltaic stacked cells), which uses power electronics technology to perform voltage conversion of different power generation units, unify the output voltages of different power generation units in the battery assembly, eliminate parallel adaptation problems, and thus greatly improve the power generation efficiency of the stacked battery assembly.

[0145] In another embodiment of the present application, a battery control method is provided. The battery control method is applied to the aforementioned battery assembly 20. The battery assembly 20 includes a first power generation unit 21 and a second power generation unit connected in series.

[0146] See Figure 10 , which is a flow chart of a battery control method provided in an embodiment of the present application.

[0147] like Figure 10 As shown, the method includes:

[0148] S61: monitoring a first voltage output by the first power generation unit.

[0149] S62: performing a voltage reduction or voltage increase process 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.

[0150] In the above process, the method further includes:

[0151] S63: Tracking the target power point of 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.

[0152] It should be noted that step S63 has no sequential execution relationship with the aforementioned steps S61 and S62.

[0153] The above battery control method can be implemented via the aforementioned battery control circuit 10. In a specific embodiment, for a battery assembly composed of a crystalline silicon battery and a calcium silicate battery, see Figure 11 , the specific process of an optional battery control method is as follows:

[0154] S71: Start.

[0155] S72: Monitor the output voltage of the crystalline silicon cell.

[0156] S73: Power point tracking regulation of perovskite cells.

[0157] Here, S73 can be implemented by the first power point tracking module 40 .

[0158] S74: The first regulation module of the perovskite battery is started.

[0159] S75: Adjust the output voltage of the perovskite cell to be the same as that of the crystalline silicon cell.

[0160] S76: The output voltage of the perovskite cell and the output voltage of the crystalline silicon cell are output in parallel.

[0161] S77: Power point tracking and real-time regulation of perovskite cells.

[0162] Here, S77 is also implemented by the first power point tracking module 40 .

[0163] Here, S72 is equivalent to the aforementioned S61, S73 to S74 are equivalent to the aforementioned S62, and S73 and S77 are equivalent to the aforementioned S63.

[0164] An embodiment of the present application provides a power optimization strategy adapted to battery assemblies (such as photovoltaic stacked cells). Through power electronics technology, voltage conversion of different power generation units is performed, the output voltages of different power generation units in the battery assembly are unified, and parallel adaptation problems are eliminated, thereby greatly improving the power generation efficiency of the stacked cell assembly.

[0165] In another embodiment of the present application, see Figure 12 , which provides a battery system 80, which includes several of the aforementioned battery control circuits 10, and the several battery control circuits 10 are connected in series.

[0166] Here, the battery control circuit 10 includes a battery assembly 20, a first adjustment module 30 and a first power point tracking module 40. For the battery control circuit 10, the first adjustment module 30 can improve the mismatch problem of the power generation unit in the battery assembly 20. At the same time, the first power point tracking module 40 can also increase the output power of the battery assembly 20, thereby improving the power generation efficiency and life of the battery control circuit 10.

[0167] The above is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

[0168] 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 not disclosed in the storage medium, storage medium, and device embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0169] It should be understood that "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" or "in some embodiments" appearing 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 the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other. For the sake of brevity, they will not be repeated here.

[0170] It should also be noted that, in this application, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0171] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0172] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0173] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0174] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0175] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0176] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A battery control circuit, characterized in that: The battery control circuit includes a battery assembly, and the battery assembly includes a first power generation unit and a second power generation unit connected in parallel; The battery control circuit further includes a first power point tracking module and a first regulating 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 regulating module is connected to both the first power generation unit and the second power generation unit, and is configured to obtain the first voltage output by the first power generation unit; and based on the first voltage, the original voltage of the second power generation unit is stepped down or stepped up 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, characterized in that: The first regulating module includes a control unit and a first regulating 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 adjust a duty cycle of the first adjustment signal based on a voltage difference between the first voltage and an original voltage at a positive terminal and a negative terminal of the second power generation unit; The first regulating unit is connected to the control unit and the second power generation unit, and is configured to receive and, based on the first regulating signal, step down or step up 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 and the first voltage are less than or equal to a preset voltage threshold; Among them, the first power point tracking module is connected to the positive terminal and the negative terminal of the second power generation unit, and the first adjustment unit is connected between the positive terminal and the negative terminal of the second power generation unit and the positive output terminal and the negative output terminal of the second power generation unit.

3. The battery control circuit according to claim 2, characterized in that: In the case where the first voltage is greater than the original voltage of the second power generation unit, the first regulating unit is a boost chopper Boost circuit; In a case where the first voltage is less than the original voltage of the second power generation unit, the first regulating unit is 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 terminal of the first switch receives the first regulating 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 second power generation unit are connected in parallel, and the negative output terminal of the first power generation unit and the negative output terminal of each second power generation unit are connected in parallel.

5. The battery control circuit according to claim 3, 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 second 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 second power generation unit; the second end of the second switch, the negative terminal 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 end of the second switch receives the first regulation signal.

6. The battery control circuit according to claim 2, characterized in that: The battery control circuit further includes a second power point tracking module, the second power point tracking module being connected to the positive terminal and the negative terminal 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 to keep the output parameters of the first power generation unit in a target power state.

7. The battery control circuit according to claim 2, characterized in that: The first regulating module further 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 a 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 claim 2, characterized in that: The first regulating 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 control the positive terminal of the first power generation unit and the positive output terminal of the first power generation unit to be in a circuit state if the working state of the first power generation unit meets the preset conditions; or to control the positive terminal of the first power generation unit and the positive output terminal 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 conditions; 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 switch device or a transistor.

9. The battery control circuit according to claim 1, characterized in that: 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 regulating module; the second regulating module is connected to an output terminal of the battery control circuit and is configured to receive a second regulating signal and, based on the second regulating signal, perform a voltage reduction or voltage increase process on the battery control circuit so that a difference between output currents of the plurality of battery control circuits is less than or equal to a preset current threshold; The second regulating module includes a buck chopper circuit or a boost chopper circuit.

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

11. The battery control circuit according to any one of claims 1 to 10, characterized in that: The cell assembly is a photovoltaic stacked cell, which is used to convert absorbed light energy into electrical energy; The battery assembly has an upper surface and a lower surface that are 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, characterized in that: The battery system includes several battery control circuits according to any one of claims 1 to 11, and the several battery control circuits are connected in series.

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