Battery assembly and electric equipment

Abstract

The embodiment of the utility model relates to a battery assembly and electric equipment. The battery assembly comprises at least one series battery module and at least one parallel battery module, and the series battery module comprises a plurality of series battery pieces; the parallel battery module comprises a plurality of sub battery modules which are connected in parallel, and each sub battery module comprises a plurality of battery pieces which are connected in series; each battery piece is connected in parallel with a diode; the positive electrode of the series battery module and the positive electrode of the parallel battery module are connected with each other to form the positive electrode of the battery assembly; the negative electrode of the series battery module and the negative electrode of the parallel battery module are connected with each other to form the negative electrode of the battery assembly, so that the anti-shielding capability of the solar battery assembly can be improved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of solar cells, and in particular to a battery assembly and an electrical device. Background Art

[0002] At present, the market demand for electric vehicles equipped with solar cell modules is growing, but a serious problem comes with it, that is, the solar cell modules may have some cells blocked due to external reasons, such as being blocked by advertising stickers, car baskets, etc.

[0003] At present, the solar cell modules on the market are composed of multiple cells connected in series. When a cell is blocked, the impedance of the series path where the cell is located will increase, so that the output power of the entire solar cell module will drop significantly, and then the electric vehicle will not be able to go on the road normally. Therefore, how to improve the anti-blocking ability of solar cell modules has become an urgent problem to be solved. Utility Model Content

[0004] The embodiments of the present disclosure provide a battery assembly and an electrical device, which can improve the anti-shading capability of the solar cell assembly.

[0005] In a first aspect, an embodiment of the present disclosure provides a battery assembly, which includes: at least one series-connected battery module and at least one parallel-connected battery module, wherein the series-connected battery module includes a plurality of battery cells connected in series; the parallel-connected battery module includes a plurality of sub-battery modules connected in parallel, and the sub-battery module includes a plurality of battery cells connected in series; each battery cell is connected in parallel with a diode; the positive electrode of the series-connected battery module and the positive electrode of the parallel-connected battery module are interconnected to form a positive electrode of the battery assembly; the negative electrode of the series-connected battery module and the negative electrode of the parallel-connected battery module are interconnected to form a negative electrode of the battery assembly.

[0006] In one embodiment, the battery assembly further includes a first detection circuit capable of detecting a charging voltage of the series-connected battery modules, and the first detection circuit is connected to the series-connected battery modules.

[0007] In one embodiment, the first detection circuit includes a first resistor, a second resistor and a first analog-to-digital converter. The first resistor and the second resistor are connected in series and then connected in parallel with the series battery module. The first analog-to-digital converter is connected to a voltage detection point between the first resistor and the second resistor to detect the charging voltage of the series battery module through the voltage detection point between the first resistor and the second resistor.

[0008] In one embodiment, the battery assembly further includes a second detection circuit capable of detecting the charging voltage of the parallel battery modules, and the second detection circuit is connected to the parallel battery modules.

[0009] In one embodiment, the second detection circuit includes a third resistor, a fourth resistor and a second analog-to-digital converter. The third resistor and the fourth resistor are connected in series and then connected in parallel with the parallel battery module. The second analog-to-digital converter is connected to a voltage detection point between the third resistor and the fourth resistor to detect the charging voltage of the parallel battery module through the voltage detection point between the third resistor and the fourth resistor.

[0010] In one embodiment, the battery assembly further includes a diode connected to the positive electrode of the series-connected battery modules and a diode connected to the positive electrode of the parallel-connected battery modules.

[0011] In a second aspect, an embodiment of the present disclosure provides an electrical device, which includes a mainboard and a battery assembly according to any one of the first aspects, wherein the mainboard is connected to a positive electrode of the battery assembly.

[0012] In one embodiment, the main board includes a controller, which is respectively connected to a first analog-to-digital converter and a second analog-to-digital converter in the battery assembly to obtain a charging voltage of a series battery module and a charging voltage of a parallel battery module in the battery assembly.

[0013] In one of the embodiments, the main board also includes a buck-boost circuit; the input end of the buck-boost circuit is connected to the positive electrode of the battery assembly; and the output end of the buck-boost circuit is connected to the controller.

[0014] In one of the embodiments, the mainboard further includes a watchdog circuit; the input end of the watchdog circuit is connected to the output end of the buck-boost circuit; and the output end of the watchdog circuit is connected to the controller.

[0015] In one of the embodiments, the electrical equipment further includes an energy storage component; the energy storage component is connected to the buck-boost circuit and the load respectively.

[0016] The battery assembly provided by the embodiment of the present disclosure includes at least one series battery module and at least one parallel battery module, wherein the series battery module includes a plurality of battery cells connected in series; the parallel battery module includes a plurality of sub-battery modules connected in parallel, and the sub-battery module includes a plurality of battery cells connected in series; each battery cell is connected in parallel with a diode; the positive electrode of the series battery module and the positive electrode of the parallel battery module are interconnected to form the positive electrode of the battery assembly; the negative electrode of the series battery module and the negative electrode of the parallel battery module are interconnected to form the negative electrode of the battery assembly. Since each battery cell is connected in parallel with a diode, when a battery cell is blocked and the path impedance increases, the diode can be used for parallel shunting, which will not affect the power output of other unblocked battery cells. Therefore, the battery assembly provided by the embodiment of the present disclosure can achieve the purpose of improving the anti-blocking ability of the solar cell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] FIG1 is a schematic diagram of a solar cell assembly in one embodiment;

[0019] FIG2 is a schematic diagram of another solar cell assembly according to an embodiment;

[0020] FIG3 is a schematic diagram of a battery assembly in one embodiment;

[0021] FIG4 is a schematic diagram of another battery assembly according to an embodiment;

[0022] FIG5 is a first detection circuit in one embodiment;

[0023] FIG6 is a second detection circuit in one embodiment;

[0024] FIG7 is a schematic diagram of yet another battery assembly according to an embodiment;

[0025] FIG. 8 is a schematic diagram of an electrical device in an embodiment. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure are further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present disclosure and are not used to limit the embodiments of the present disclosure.

[0027] At present, the market demand for electric vehicles equipped with solar cell modules is growing. With the popularization of intelligent electric vehicles and the demand for real-time heart rate, the power consumption of electric vehicles is increasing, and the demand for power supply from solar cell modules is also increasing.

[0028] However, the solar cell modules currently available on the market are composed of multiple cells connected in series. For example, the solar cell module shown in Figure 1 has 12 cells connected in series. When a cell is blocked, such as by an advertising sticker or a basket, the impedance of the series path where the cell is located will increase, and the output power of the entire solar cell module will drop significantly, making it impossible for the electric vehicle to be on the road normally.

[0029] Based on the need to prevent shielding, some solar cell modules have made improvements to the solar cell module in Figure 1. As shown in Figure 2, it is two battery strings connected in parallel, where each battery string includes 6 battery cells connected in series, that is, a combination of 2 parallel and 6 series of battery cells. Compared with the solar cell module in Figure 1, when a battery cell in the solar cell module in Figure 2 is blocked, the probability of a significant drop in the output power of the entire solar cell module will be reduced by half, but there is still a high risk of output power drop.

[0030] Based on this, it is necessary to propose effective technical means to solve the above problems. The technical solution of the present application and how the technical solution of the present application solves the above technical problems are described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0031] In one embodiment, as shown in FIG3 , a battery assembly is provided, which includes: at least one series battery module 100 and at least one parallel battery module 200. The series battery module 100 includes a plurality of battery cells connected in series; the parallel battery module 200 includes a plurality of sub-battery modules connected in parallel, and the sub-battery module includes a plurality of battery cells connected in series; each battery cell is connected in parallel with a diode; the positive electrode of the series battery module 100 and the positive electrode of the parallel battery module 200 are connected to each other to form the positive electrode of the battery assembly; the negative electrode of the series battery module 100 and the negative electrode of the parallel battery module 200 are connected to each other to form the negative electrode of the battery assembly.

[0032] The cell includes a plurality of photodiodes connected in series. The diode connected in parallel with the cell may be a photodiode or a common diode, and the number of diodes connected in parallel with the cell may be one or more.

[0033] The positive pole of the battery assembly is used to connect to the electrical equipment to supply power to the electrical equipment, and the negative pole of the battery assembly is grounded.

[0034] FIG3 takes two series battery modules 100 and one parallel battery module 200, and the parallel battery module 200 includes two sub-battery modules as an example. For the sake of distinction, the two series battery modules 100 are respectively referred to as the first series battery module and the second series battery module, and the two sub-battery modules are respectively referred to as the first sub-battery module and the second sub-battery module. The first series battery module, the second series battery module, the first sub-battery module and the second sub-battery module each include three series-connected battery cells, each battery cell includes three photodiodes, and each battery cell is connected in parallel with a diode. In FIG3, a diode with a circle represents a photodiode, and a diode without a circle represents a diode connected in parallel with a battery cell.

[0035] The positive electrode of the first series-connected battery module, the positive electrode of the second series-connected battery module, the positive electrode of the first sub-battery module and the positive electrode of the second sub-battery module are all connected to each other to form the positive electrode of the battery assembly, as shown in “+” in FIG. 3 .

[0036] The negative electrode of the first series-connected battery module, the negative electrode of the second series-connected battery module, the negative electrode of the first sub-battery module and the negative electrode of the second sub-battery module are all connected to each other to form the negative electrode of the battery assembly, as shown in “-” in FIG. 3 .

[0037] In order to intuitively see the difference between the connection relationship of the battery cells in the present application and those in FIG. 1 and FIG. 2 , another battery assembly is provided, a combination of 3 series and 2 parallel battery cells, as shown in FIG. 4 .

[0038] It should be noted that the present application does not limit the number of series-connected battery modules 100, the number of parallel battery modules 200, the number of sub-battery modules, the number of battery cells connected in series in the series battery module 100, the number of battery cells connected in series in the sub-battery modules, and the number of photodiodes connected in series in each battery cell.

[0039] The above-mentioned battery assembly includes at least one series battery module 100 and at least one parallel battery module 200, wherein the series battery module 100 includes a plurality of battery cells connected in series; the parallel battery module 200 includes a plurality of sub-battery modules connected in parallel, and the sub-battery module includes a plurality of battery cells connected in series; each battery cell is connected in parallel with a diode; the positive electrode of the series battery module 100 and the positive electrode of the parallel battery module 200 are interconnected to form the positive electrode of the battery assembly; the negative electrode of the series battery module 100 and the negative electrode of the parallel battery module 200 are interconnected to form the negative electrode of the battery assembly. Since each battery cell is connected in parallel with a diode, when a battery cell is blocked and the path impedance increases, the diode can be used for parallel shunting, which will not affect the power output of other unblocked battery cells. Therefore, the battery assembly provided in the embodiment of the present disclosure can achieve the purpose of improving the anti-blocking ability of the solar cell assembly.

[0040] In one embodiment, as shown in FIG. 5 , a first detection circuit is provided. The battery assembly further includes a first detection circuit 300 capable of detecting the charging voltage of the series-connected battery module 100 . The first detection circuit 300 is connected to the series-connected battery module 100 .

[0041] Optionally, the first detection circuit 300 includes a first resistor R1, a second resistor R2 and a first analog-to-digital converter ADC1. The first resistor R1 and the second resistor R2 are connected in series and then connected in parallel with the series battery module 100. The first analog-to-digital converter ADC1 is connected to a voltage detection point between the first resistor R1 and the second resistor R2 to detect the charging voltage of the series battery module 100 through the voltage detection point between the first resistor R1 and the second resistor R2.

[0042] In the disclosed embodiment, the first detection circuit 300 can send the collected charging voltage of the series battery module 100 to a controller in the electrical equipment. The controller calculates the charging current of the series battery module 100 based on the charging voltage, and reports the charging information including the charging current of the series battery module 100 to the server. In this way, the server counts the charging information reported by all electrical equipment in an area (such as a city), and can count the areas that are most susceptible to obstruction during actual operation of the city. When the next generation of products are replaced and iterated, more battery cells can be arranged in parallel in the areas of the battery assembly that are obviously obstructed.

[0043] In one embodiment, as shown in FIG. 6 , a second detection circuit is provided, and the battery assembly further includes a second detection circuit 400 capable of detecting the charging voltage of the parallel battery module 200 , and the second detection circuit 400 is connected to the parallel battery module 200 .

[0044] Optionally, the second detection circuit 400 includes a third resistor R3, a fourth resistor R4 and a second analog-to-digital converter ADC2. The third resistor R3 and the fourth resistor R4 are connected in series and connected in parallel with the parallel battery module 400. The second analog-to-digital converter ADC2 is connected to a voltage detection point between the third resistor R3 and the fourth resistor R4 to detect the charging voltage of the parallel battery module 200 through the voltage detection point between the third resistor R3 and the fourth resistor R4.

[0045] In the disclosed embodiment, the second detection circuit 400 can send the collected charging voltage of the parallel battery module 400 to the controller in the electrical equipment. The controller calculates the charging current of the parallel battery module 400 based on the charging voltage. The controller reports the charging information including the charging current of the parallel battery module 400 to the server. In this way, the server counts the charging information reported by all electrical equipment in an area (such as a city), and can count the areas that are most susceptible to obstruction during actual operation of the city. When the next generation of products are replaced and iterated, more battery cells can be arranged in parallel in the areas of the battery assembly that are obviously obstructed.

[0046] In one embodiment, as shown in FIG. 7 , another battery assembly is provided, the battery assembly further comprising a diode connected to the positive electrode of the series battery module 100 and a diode connected to the positive electrode of the parallel battery module 200 .

[0047] Figure 7 is a schematic diagram of the most detailed battery assembly of the present application in combination with Figures 3, 5 and 6, wherein the positive electrode of the first series-connected battery module is connected to a diode; the positive electrode of the second series-connected battery module is connected to a diode, and the positive electrode of the first sub-battery module and the positive electrode of the second sub-battery module are connected to a diode after being connected.

[0048] In one embodiment, the present disclosure provides an electric device, as shown in Figure 8, the electric device includes a mainboard and a battery assembly described in any of the above battery assembly embodiments. The mainboard is connected to the positive electrode of the battery assembly.

[0049] The main board may be a PCBA (Printed Circuit Board Assembly).

[0050] Optionally, the main board includes a controller, which is respectively connected to a first analog-to-digital converter and a second analog-to-digital converter in the battery assembly to obtain a charging voltage of a series battery module and a charging voltage of a parallel battery module in the battery assembly.

[0051] Wherein, the controller may be a single chip microcomputer, such as an MCU (Microcontroller Unit). Based on FIG7 , the controller is connected to two first analog-to-digital converters and one second analog-to-digital converter to obtain the charging voltage of the first series battery module, the charging voltage of the second series battery module, and the charging voltage of the parallel battery module.

[0052] The mainboard also includes a buck-boost circuit; the input end of the buck-boost circuit is connected to the positive electrode of the battery assembly; the output end of the buck-boost circuit is connected to the controller to supply power to the controller. The buck-boost circuit includes a DC-DC converter.

[0053] The main board also includes a watchdog circuit; the input end of the watchdog circuit is connected to the output end of the buck-boost circuit; and the output end of the watchdog circuit is connected to the controller.

[0054] The electrical equipment also includes an energy storage component; the energy storage component is connected to the buck-boost circuit and the load respectively, wherein the energy storage component includes a lithium battery.

[0055] It is understandable that a watchdog circuit may also be connected between the energy storage component and the load.

[0056] If the output power of the battery pack is 6.0w, a buck-boost circuit with an output voltage of 5.2V is selected, and a lithium battery with an output voltage of 3.6V-4.2V is selected. At this time, the lithium battery can output less than 1000mA of current to the buck-boost circuit, and the current output to the load is about 2000mA. The current output by the buck-boost circuit is about 100mA.

[0057] In the disclosed embodiment, after obtaining the charging voltage of the first series battery module, the charging voltage of the second series battery module and the charging voltage of the parallel battery module, the controller calculates the charging current of the first series battery module, the charging current of the second series battery module and the charging current of the parallel battery module respectively, and reports the charging information including the charging current of the first series battery module, the charging current of the second series battery module and the charging current of the parallel battery module to the server.

[0058] The server uses the charging information reported by the controllers of all power-consuming equipment in the city to calculate the average charging current, and screens out multiple target power-consuming equipment with a charging current lower than the average from all power-consuming equipment based on the average charging current, and obtains the output power of the first series-connected battery module, the output power of the second series-connected battery module, and the output power of the parallel battery module of the multiple target power-consuming equipment. Based on the output power of the first series-connected battery module, the output power of the second series-connected battery module, and the output power of the parallel battery module of the multiple target power-consuming equipment, the areas of the battery assemblies that are most susceptible to obstruction during actual operation of the city are counted, and more battery cells can be arranged in parallel in the obviously obstructed areas of the battery assembly during replacement and iteration of the next generation of products.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0060] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0061] It can be understood that the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, units, elements, etc. have transmission of electrical signals or data with each other.

[0062] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0063] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0064] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the embodiments of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the embodiments of the present disclosure, and these all belong to the protection scope of the embodiments of the present disclosure. Therefore, the protection scope of the patent of the embodiments of the present disclosure shall be subject to the attached claims.

Claims

1. A battery assembly, characterized in that: The battery assembly comprises: at least one series battery module and at least one parallel battery module, wherein the series battery module comprises a plurality of battery cells connected in series; the parallel battery module comprises a plurality of parallel sub-battery modules, and the sub-battery module comprises a plurality of series-connected battery cells; each of the battery cells is connected in parallel with a diode; The positive electrode of the series battery module and the positive electrode of the parallel battery module are connected to each other to form the positive electrode of the battery assembly; The negative electrode of the series-connected battery module and the negative electrode of the parallel-connected battery module are connected to each other to form the negative electrode of the battery assembly.

2. The battery assembly according to claim 1, characterized in that: The battery assembly further includes a first detection circuit capable of detecting a charging voltage of the series-connected battery module, wherein the first detection circuit is connected to the series-connected battery module.

3. The battery assembly according to claim 2, characterized in that: The first detection circuit includes a first resistor, a second resistor and a first analog-to-digital converter. The first resistor is connected in series with the second resistor and then connected in parallel with the series battery module. The first analog-to-digital converter is connected to a voltage detection point between the first resistor and the second resistor to detect the charging voltage of the series battery module through the voltage detection point between the first resistor and the second resistor.

4. The battery assembly according to claim 1, characterized in that: The battery assembly also includes a second detection circuit capable of detecting the charging voltage of the parallel battery module, and the second detection circuit is connected to the parallel battery module.

5. The battery assembly according to claim 4, characterized in that: The second detection circuit includes a third resistor, a fourth resistor and a second analog-to-digital converter. The third resistor is connected in series with the fourth resistor and then connected in parallel with the parallel battery module. The second analog-to-digital converter is connected to a voltage detection point between the third resistor and the fourth resistor to detect the charging voltage of the parallel battery module through the voltage detection point between the third resistor and the fourth resistor.

6. The battery assembly according to claim 1, characterized in that: The battery assembly also includes a diode connected to the positive electrode of the series battery module and a diode connected to the positive electrode of the parallel battery module.

7. An electrical equipment, characterized in that: The electrical device comprises a mainboard and a battery assembly as claimed in any one of claims 1 to 6, wherein the mainboard is connected to the positive electrode of the battery assembly.

8. The electrical equipment according to claim 7, characterized in that: The mainboard includes a controller, which is respectively connected to a first analog-to-digital converter and a second analog-to-digital converter in the battery assembly to obtain a charging voltage of a series-connected battery module and a charging voltage of a parallel-connected battery module in the battery assembly.

9. The electrical equipment according to claim 8, characterized in that: The mainboard also includes a buck-boost circuit; The input end of the buck-boost circuit is connected to the positive electrode of the battery assembly; the output end of the buck-boost circuit is connected to the controller.

10. The electrical equipment according to claim 9, characterized in that: The mainboard also includes a watchdog circuit; The input end of the watchdog circuit is connected to the output end of the buck-boost circuit; the output end of the watchdog circuit is connected to the controller.

11. The electrical equipment according to claim 9, characterized in that: The electrical equipment also includes an energy storage component; The energy storage component is connected to the buck-boost circuit and the load respectively.

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