Control method of battery device, battery device, system, medium, power equipment

Abstract

Provided are a control method of a battery device (200), the battery device (200), a system, a medium, and a power equipment. The method comprises: acquiring a state parameter of a first battery module (10) in the battery device (200); in a case where the state parameter of the first battery module (10) is less than a preset threshold, controlling the first battery module (10) and a charging device (100) to form a first charging loop; in a case where the state parameter of the first battery module (10) is greater than or equal to the preset threshold, controlling the first battery module (10) and a second battery module (20) in the battery device (200) to form a second charging loop in series with the charging device (100); wherein a charging rate of the first charging loop is higher than a charging rate of the second charging loop, and the charging speed can be improved.

Description

[0001] This application is a divisional application of Chinese invention patent application filed on September 27, 2021, with application number 202180079554.3 and entitled "Control method for battery device and battery device, system and medium". Technical Field

[0002] This application belongs to the field of battery technology, and in particular relates to control methods for battery devices, as well as battery devices, systems, media, and power equipment. Background Technology

[0003] With the development of new energy technologies, batteries are being used in increasingly wider fields. For example, batteries can serve as a power source to power electrical equipment, thereby reducing the use of non-renewable resources.

[0004] However, with the development of batteries, the issue of driving range often arises. Currently, batteries typically incorporate two battery modules made of different materials to improve driving range. However, due to the differences in materials, the two battery modules can withstand different maximum charging rates. To ensure charging safety, the smaller of the two maximum charging rates is usually used, charging both modules simultaneously, resulting in a slower charging speed. Therefore, it is clear that current batteries with two battery modules suffer from slow charging speeds. Summary of the Invention

[0005] This application provides a control method for a battery device, as well as a battery device, system, medium, and power equipment, which can at least solve the problem of slow charging speed when the battery has two battery modules.

[0006] In a first aspect, embodiments of this application provide a control method for a battery device, including: Obtain the status parameters of the first battery module in the battery device; When the state parameters of the first battery module are less than a preset threshold, the first battery module is controlled to form a first charging circuit with the charging device. When the state parameter of the first battery module is greater than or equal to the preset threshold, the first battery module, the second battery module in the battery device and the charging device are connected in series to form a second charging circuit. The charging rate of the first charging circuit is higher than that of the second charging circuit.

[0007] In this embodiment, since the charging rate of the first charging circuit is higher than that of the second charging circuit, during the charging process, different charging rates can be used to charge the battery modules forming the charging circuit with the charging device, based on a comparison between the state parameters of the first battery module and a preset threshold. Specifically, if the state parameters of the first battery module are less than the preset threshold, the first charging circuit is charged using its own charging rate; conversely, if the state parameters of the first battery module rise to a level greater than or equal to the preset threshold, the charging rate of the second charging circuit is used to charge both the first and second battery modules simultaneously. This improves charging speed compared to the current method of using the lower of the two battery modules' tolerance rates, while ensuring charging safety.

[0008] In some embodiments, after controlling the first battery module to form a first charging circuit with the charging device, the method further includes: Obtain the charged battery capacity of the first battery module; Based on the charged battery capacity of the first battery module, update the charging rate of the first charging circuit; The charging device is controlled to charge the first battery module according to the charging rate of the first charging circuit.

[0009] In this embodiment, during the process of the charging device charging the first battery module through the first charging circuit, the charging rate determined based on the charged battery capacity of the first battery module can be used to charge the first battery module, thereby enabling the charging rate to be adjusted according to the amount of charging.

[0010] In some implementations, a first charging rate determined based on the first charged battery capacity of the first battery module is higher than a second charging rate determined based on the second charged battery capacity of the first battery module, wherein the first charged battery capacity is lower than the second charged battery capacity.

[0011] In this embodiment, as the capacity of the charged battery in the first battery module increases, the charging rate of the first charging circuit can be reduced, thereby ensuring not only the charging speed but also improving the safety during the charging process.

[0012] In some implementations, the state parameter includes the state of charge (SOC) or voltage.

[0013] In this embodiment, the method of obtaining the state parameters of the first battery module can be simple and flexible.

[0014] In some implementations, if the rated capacity of the first battery module is higher than the rated capacity of the second battery module, and the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, then the state parameter of the first battery module is equal to the preset threshold.

[0015] In this embodiment, when the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, a smaller charging rate can be switched to charge the first and second battery modules. This not only improves the charging speed but also ensures charging safety.

[0016] Secondly, embodiments of this application also provide a battery device, comprising: First battery module and second battery module; A switching unit is connected to the first battery module and the second battery module. The switching unit is in a first working state or a second working state. When the charging device charges the battery and the switching unit is in the first working state, the first battery module and the charging device form a first charging circuit. When the charging device charges the battery and the switching unit is in the second working state, the first battery module, the second battery module and the charging device are connected in series to form a second charging circuit. A battery management unit is connected to the switch unit and the first battery module. The battery management unit is used to: control the switch unit to be in the first working state when the state parameter of the first battery module is less than a preset threshold; and control the switch unit to be in the second working state when the state parameter of the first battery module is greater than or equal to the preset threshold, wherein the charging rate of the first charging circuit is higher than the charging rate of the second charging circuit.

[0017] In this embodiment, since the charging rate of the first charging circuit is higher than that of the second charging circuit, during the charging process, different charging rates can be used to charge the battery modules forming the charging circuit with the charging device, based on a comparison between the state parameters of the first battery module and a preset threshold. Specifically, if the state parameters of the first battery module are less than the preset threshold, the first charging circuit is charged using its own charging rate; conversely, if the state parameters of the first battery module rise to a level greater than or equal to the preset threshold, the charging rate of the second charging circuit is used to charge both the first and second battery modules simultaneously. This improves charging speed compared to the current method of using the lower of the two battery modules' tolerance rates, while ensuring charging safety.

[0018] In some embodiments, a first end of the first battery module is used to connect to a second end of the charging device when the charging device is charging the battery device; The switching unit includes: A first switch, wherein a first end of the first switch is connected to the battery management unit, and the first end of the first switch is further configured to: connect to the first end of the charging device when the charging device is charging the battery device; a second end of the first switch is connected to the second end of the first battery module; and a third end of the first switch is connected to the first end of the second battery module. The second switch has a first end connected to the second end of the first switch and a second end connected to the second end of the second battery module. In the case where the charging device is charging the battery device, if the first terminal of the first switch is connected to the second terminal of the first switch and the first terminal of the second switch is disconnected from the second terminal of the second switch, then the first battery module and the charging device form the first charging circuit; if the first terminal of the first switch is connected to the third terminal of the first switch and the first terminal of the second switch is connected to the second terminal of the second switch, then the first battery module, the second battery module and the charging device are connected in series to form the second charging circuit.

[0019] In this embodiment, by setting the first switch and the second switch, the formation of a first charging circuit and a second charging circuit between the battery device and the charging device can be controlled respectively, which is simple to implement and has high reliability.

[0020] In some embodiments, the first battery module includes M first battery cells, and the second battery module includes N second battery cells, where M and N are both integers greater than 1. When M is less than or equal to N, at least one of the N second battery cells is disposed between two adjacent first battery cells among the M first battery cells. When M is greater than N, at least one of the M first battery cells is disposed between two adjacent second battery cells among the N second battery cells.

[0021] In this embodiment, by arranging M first battery cells and N second battery cells in an alternating manner, not only can the heat dissipation performance of the first battery module be improved during the charging process, but the heat generated by the parameters of the first battery cells can also raise the temperature of the second battery cells, thereby improving the charging performance of the second battery module.

[0022] Thirdly, embodiments of this application provide a battery device, including: A status parameter acquisition module is used to acquire the status parameters of the first battery module in the battery device. The control module is configured to: control the first battery module to form a first charging circuit with the charging device when the state parameter of the first battery module is less than a preset threshold; and control the first battery module, the second battery module in the battery device, and the charging device to form a second charging circuit when the state parameter of the first battery module is greater than or equal to the preset threshold. The charging rate of the first charging circuit is higher than that of the second charging circuit.

[0023] In this embodiment, since the charging rate of the first charging circuit is higher than that of the second charging circuit, during the charging process, different charging rates can be used to charge the battery modules forming the charging circuit with the charging device, based on a comparison between the state parameters of the first battery module and a preset threshold. Specifically, if the state parameters of the first battery module are less than the preset threshold, the first charging circuit is charged using its own charging rate; conversely, if the state parameters of the first battery module rise to a level greater than or equal to the preset threshold, the charging rate of the second charging circuit is used to charge both the first and second battery modules simultaneously. This improves charging speed compared to the current method of using the lower of the two battery modules' tolerance rates, while ensuring charging safety.

[0024] In some embodiments, the apparatus further includes: A charged battery capacity acquisition module is used to acquire the charged battery capacity of the first battery module; The charging rate update module is used to update the charging rate of the first charging circuit based on the charged battery capacity of the first battery module.

[0025] In this embodiment, during the process of the charging device charging the first battery module through the first charging circuit, the charging rate determined based on the charged battery capacity of the first battery module can be used to charge the first battery module, thereby enabling the charging rate to be adjusted according to the amount of charging.

[0026] In some implementations, a first charging rate determined based on the first charged battery capacity of the first battery module is higher than a second charging rate determined based on the second charged battery capacity of the first battery module, wherein the first charged battery capacity is lower than the second charged battery capacity.

[0027] In this embodiment, as the capacity of the charged battery in the first battery module increases, the charging rate of the first charging circuit can be reduced, thereby ensuring not only the charging speed but also improving the safety during the charging process.

[0028] In some implementations, the state parameter includes the state of charge (SOC) or voltage.

[0029] In this embodiment, the method of obtaining the state parameters of the first battery module can be simple and flexible.

[0030] In some implementations, if the rated capacity of the first battery module is higher than the rated capacity of the second battery module, and the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, then the state parameter of the first battery module is equal to the preset threshold.

[0031] In this embodiment, when the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, a smaller charging rate can be switched to charge the first and second battery modules. This not only improves the charging speed but also ensures charging safety.

[0032] Fourthly, a charging system is provided, including a charging device and a battery device provided by any alternative embodiment of the second aspect.

[0033] Fifthly, a battery device is provided, comprising: Processor and memory storing computer program instructions; The processor reads and executes computer program instructions to implement the control method of the battery device provided in any alternative implementation of the first aspect.

[0034] In a sixth aspect, a computer storage medium is provided, on which computer program instructions are stored, wherein when the computer program instructions are executed by a processor, a control method for a battery device provided in any optional embodiment of the first aspect is implemented. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0036] Figure 1 This is one of the structural schematic diagrams of the charging system provided in the embodiments of this application; Figure 2This is a second schematic diagram of the charging system provided in the embodiments of this application; Figure 3 This is the third schematic diagram of the charging system provided in the embodiments of this application; Figure 4 This is a schematic flowchart of the control method for the battery device provided in the embodiments of this application; Figure 5 This is a schematic diagram of the charging process of the battery device provided in the embodiments of this application; Figure 6 This is a schematic diagram of the battery device provided in the embodiments of this application; Figure 7 This is the fourth schematic diagram of the charging system provided in the embodiments of this application; Figure 8 This is a schematic diagram of the hardware structure of the battery device provided in the embodiments of this application. Detailed Implementation

[0037] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0039] To better understand this application, the following will describe in detail, with reference to the accompanying drawings, the battery and its control method, apparatus, device and medium according to embodiments of this application. It should be noted that these embodiments are not intended to limit the scope of this application.

[0040] According to some embodiments of this application, Figure 1 This is a schematic diagram of a charging system provided in an embodiment of this application. Figure 1 As shown, the charging system includes a charging device 100 and a battery device 200, wherein the battery device 200 may include: First battery module 10 and second battery module 20; A switching unit 30 is connected to the first battery module 10 and the second battery module 20. The switching unit 30 is in a first working state or a second working state. When the charging device 100 charges the battery and the switching unit 30 is in the first working state, the first battery module 10 and the charging device 100 form a first charging circuit. When the charging device 100 charges the battery and the switching unit 30 is in the second working state, the first battery module 10, the second battery module 20 and the charging device 100 are connected in series to form a second charging circuit. A battery management unit 40 is connected to the switch unit 30 and the first battery module 10. The battery management unit 40 is used to: control the switch unit 30 to be in the first working state when the state parameter of the first battery module 10 is less than a preset threshold; and control the switch unit 30 to be in the second working state when the state parameter of the first battery module 10 is greater than or equal to the preset threshold, wherein the charging rate of the first charging circuit is higher than the charging rate of the second charging circuit.

[0041] Based on this, since the charging rate of the first charging circuit is higher than that of the second charging circuit, during the charging process, different charging rates can be used to charge the battery modules forming the charging circuit with the charging device 100, depending on the comparison between the state parameters of the first battery module 10 and a preset threshold. Specifically, if the state parameters of the first battery module 10 are less than the preset threshold, the first charging circuit is charged using its own charging rate; conversely, if the state parameters of the first battery module 10 rise to a level greater than or equal to the preset threshold, the charging rate of the second charging circuit is used to charge both the first battery module 10 and the second battery module 20 simultaneously. In this way, compared to the current method of using the lower of the two battery modules' tolerance rates during charging, the charging speed can be improved while ensuring charging safety.

[0042] It should be noted that the aforementioned battery device can be any component capable of providing electrical energy to a power source, which may include electric vehicles or electric aircraft, etc.

[0043] In this embodiment of the application, the battery device includes the first battery module 10 and the second battery module 20. The first battery module 10 and the second battery module 20 can provide electrical energy to the power device individually; of course, the first battery module 10 and the second battery module 20 can also cooperate to provide electrical energy to the power device.

[0044] The first battery module 10 and the second battery module 20 can be made of different materials and can withstand different maximum charging rates. Specifically, to achieve a higher charging rate for the first charging circuit than for the second charging circuit, different battery materials can be used, making the maximum charging rate of the first battery module 10 greater than that of the second battery module 20.

[0045] Additionally, the energy density of the first battery module 10 can be set to be lower than that of the second battery module 20, thereby ensuring a significant increase in battery capacity after prolonged charging. Alternatively, the rated capacity of the first battery module 10 can be set to be greater than that of the second battery module 20, thereby improving the battery life under rapid charging conditions via the first charging circuit.

[0046] It should be noted that the first battery module 10 and the second battery module 20 can each be a single, integrated battery; or, the first battery module 10 can include M first battery cells, and the second battery module 20 can include N second battery cells, where M and N are integers greater than 1. The M first battery cells can be connected in series, parallel, or a combination thereof to form the first battery module 10; similarly, the N second battery cells can be connected in series, parallel, or a combination thereof to form the second battery module 20.

[0047] For example, the first battery module 10 includes six first battery cells connected in series, and the second battery module 20 includes six second battery cells connected in series, and so on.

[0048] Specifically, the first battery cell can be a battery cell made of positive electrode materials with good thermal stability, including lithium iron phosphate, lithium manganese oxide and sodium ion batteries, so as to ensure charging safety when charging the first battery module 10 at a large charging rate; the second battery cell can be a battery cell composed of ternary batteries including elements such as nickel (Ni), cobalt (Co) and manganese (Mn).

[0049] Furthermore, the energy density of the first battery cell can be greater than or equal to 150 Wh / kg, more preferably, the energy density of the first battery cell can be greater than or equal to 170 Wh / kg; the energy density of the second battery cell can be greater than or equal to 230 Wh / kg, more preferably, the energy density of the second battery cell can be greater than or equal to 250 Wh / kg. Wherein, the energy density of the first battery cell is less than the energy density of the second battery cell.

[0050] Furthermore, the ratio between the rated capacity of the first battery cell and the rated capacity of the second battery cell can be set to be greater than or equal to 1 and less than or equal to 5. More preferably, the ratio can be set to be greater than or equal to 1.3 and less than or equal to 2.5.

[0051] Of course, when the first battery module 10 includes M first battery cells and the second battery module 20 includes N second battery cells, the placement and arrangement of the M first battery cells and the N second battery cells can be set according to actual needs. For example, the M first battery cells can be arranged side by side to form a battery pack, and the N second battery cells can also be arranged side by side to form a battery pack, and the two battery packs can be arranged side by side.

[0052] Alternatively, in some embodiments, the first battery module 10 includes M first battery cells, and the second battery module 20 includes N second battery cells; when M is less than or equal to N, at least one of the N second battery cells is disposed between two adjacent first battery cells among the M first battery cells; when M is greater than N, at least one of the M first battery cells is disposed between two adjacent second battery cells among the N second battery cells. Based on this, by arranging M first battery cells and N second battery cells in an alternating manner, not only can the heat dissipation performance of the first battery module 10 be improved during the charging process, but the heat generated by the parameters of the first battery cells can also increase the temperature of the second battery cells, thereby improving the charging performance of the second battery module 20.

[0053] It should be noted that the aforementioned charging rate can be the ratio of a preset current value to the rated capacity of the battery module, and the unit charging rate can be represented by C. The aforementioned preset current value can be any current value preset in the battery device according to actual needs. Since the aforementioned battery device includes the aforementioned first battery module 10 and second battery module 20, in order to achieve a unified description of the charging rate during the charging process of the aforementioned battery device, the aforementioned charging rate can be defined as the ratio of the preset current value to the rated capacity of the aforementioned first battery module 10 or the rated capacity of the second battery module 20.

[0054] Specifically, the aforementioned charging rate is the ratio of a preset current value to the rated capacity of the first battery module 10. For example, if the preset current value is 100A and the rated capacity of the first battery module 10 is 100Ah, then the aforementioned unit charging rate C = 100A / 100Ah, and so on.

[0055] In this embodiment of the application, the battery device further includes the switch unit 30, and the switch unit 30 is connected to the first battery module 10 and the second battery module 20.

[0056] The aforementioned switch unit 30 can be any switch component capable of operating in a first operating state or a second operating state. When the switch unit 30 is in the first operating state, the aforementioned first battery module 10 and the charging device 100 (e.g., a charging pile) form a first charging circuit. When the switch unit 30 is in the second operating state, the aforementioned first battery module 10, the aforementioned second battery module 20, and the aforementioned charging device 100 form a second charging circuit.

[0057] It should be noted that, in order to enable the switching unit 30 to switch between the first working state and the second working state, the switching unit 30 can be a multi-pole multi-throw switch; or, the switching unit 30 can also be composed of multiple single-pole single-throw switches or single-pole multi-throw switches.

[0058] In some implementations, such as Figure 2 and Figure 3 As shown, the first end of the first battery module 10 is used to connect to the second end of the charging device 100 when the charging device 100 is charging the battery device.

[0059] The aforementioned switching unit 30 includes: The first switch S1 has its first end connected to the battery management unit 40, and the first end of the first switch S1 is also used to: connect to the first end of the charging device 100 when the charging device 100 is charging the battery device; the second end of the first switch S1 is connected to the second end of the first battery module 10; and the third end of the first switch S1 is connected to the first end of the second battery module 20.

[0060] The second switch S2 has its first end connected to the second end of the first switch S1, and its second end connected to the second end of the second battery module 20.

[0061] In the case where the charging device 100 is charging the battery device, if the first terminal of the first switch S1 is connected to the second terminal of the first switch S1, and the first terminal of the second switch S2 is disconnected from the second terminal of the second switch S2, then the first battery module 10 and the charging device 100 form the first charging circuit. Figure 2As shown; if the first terminal of the first switch S1 is connected to the third terminal of the first switch S1, and the first terminal of the second switch S2 is connected to the second terminal of the second switch S2, then the first battery module 10, the second battery module 20, and the charging device 100 are connected in series to form the second charging circuit, as shown. Figure 3 As shown.

[0062] Based on this, by setting the first switch S1 and the second switch S2, it is possible to control the formation of a first charging circuit and a second charging circuit between the battery device and the charging device 100, which is simple to implement and has high reliability.

[0063] It should be noted that the “connection” described in the embodiments of this application can be understood as a physical connection; of course, it can also be an electrical connection, which is not limited here.

[0064] In this embodiment of the application, the battery device further includes a battery management unit 40, which is connected to the switch unit 30 and the first battery module 10.

[0065] The battery management unit 40 can be any control component capable of controlling the switching state of the switch unit 30. When the state parameter of the first battery module 10 is less than a preset threshold, the battery management unit 40 can control the first switch S1 to be in a first working state, so that the first battery module 10 and the charging device 100 form a first charging circuit. When the state parameter of the first battery module 10 is greater than or equal to the preset threshold, the battery management unit 40 can control the first switch S1 to be in a second working state, so that the first battery module 10, the second battery module 20 and the charging device 100 form a second charging circuit.

[0066] In addition, during the charging process, the battery management unit 40 can obtain the status parameters of the first battery module 10 and compare the status parameters of the first battery module 10 with a preset threshold to determine whether the status parameters of the first battery module 10 are less than the preset threshold.

[0067] Of course, the battery management unit 40 can also be used to manage the charging and discharging processes of the first battery module 10 and the second battery module 20. Specifically, the battery management unit 40 can also be connected to the second battery module 20 to acquire the state parameters of the first battery module 10 and the second battery module 20 during charging and discharging.

[0068] It should be noted that the state parameters of the first battery module 10 mentioned above may include the state of charge (SOC) or voltage.

[0069] According to some embodiments of this application, Figure 4 This is a schematic flowchart illustrating a control method for a battery device according to an embodiment of this application. This control method can be applied to the aforementioned battery device. Figure 4 As shown, the control method for the above-mentioned battery device may include the following steps S401 to S403.

[0070] S401. Obtain the status parameters of the first battery module in the above-mentioned battery device; S402. When the state parameters of the first battery module are less than a preset threshold, control the first battery module to form a first charging circuit with the charging device. S403. When the state parameter of the first battery module is greater than or equal to the preset threshold, control the first battery module, the second battery module in the battery device and the charging device to be connected in series to form a second charging circuit. The charging rate of the first charging circuit is higher than that of the second charging circuit.

[0071] Based on this, since the charging rate of the first charging circuit is higher than that of the second charging circuit, during the charging process, different charging rates can be used to charge the battery modules forming the charging circuit with the charging device, depending on the comparison between the state parameters of the first battery module and a preset threshold. Specifically, if the state parameters of the first battery module are less than the preset threshold, the first charging circuit is charged using its own charging rate; conversely, if the state parameters rise to a level greater than or equal to the preset threshold, the charging rate of the second charging circuit is used to charge both the first and second battery modules simultaneously. In this way, compared to the current method of using the lower of the two battery modules' tolerance rates, charging speed can be improved while ensuring charging safety.

[0072] In step 401 above, during the charging process of the battery device, the battery management unit in the battery device can obtain the status parameters of its first battery module.

[0073] The aforementioned acquisition of the status parameters of the first battery module can be achieved when the battery management unit of the battery device detects that the battery device is connected to the charging device, thereby detecting the status parameters of the first battery module.

[0074] It should be noted that the status parameters of the first battery module can be any parameter that reflects the power level of the first battery module. Specifically, the status parameters of the first battery module can include SOC or voltage, thus making the method of obtaining the status parameters of the first battery module simple and flexible.

[0075] In this embodiment of the application, after the battery device obtains the status parameters of its first battery module, the battery management unit of the battery device compares the obtained status parameters of the first battery module with a preset threshold to determine whether the status parameters of the first battery module are less than the preset threshold.

[0076] The aforementioned preset threshold can be a value set according to actual needs, and the preset threshold is greater than zero and less than or equal to the state parameter of the first battery module when the charged battery capacity is the rated capacity.

[0077] For example, when the above state parameter is voltage, the above preset threshold is a preset voltage, and the preset voltage is greater than zero and less than or equal to the voltage of the first battery module in a fully charged state (i.e., the charged battery capacity is the rated capacity), and so on.

[0078] In addition, the aforementioned preset threshold can also be set according to the rated capacity of the first battery module and the rated capacity of the second battery module.

[0079] Specifically, when the rated capacity of the first battery module is higher than the rated capacity of the second battery module, if the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, then the state parameter of the first battery module is equal to the preset threshold.

[0080] Based on this, when the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, a smaller charging rate can be switched to charge the first and second battery modules. This not only improves the charging speed but also ensures charging safety.

[0081] For example, such as Figure 5 As shown, assuming the rated capacity of the first battery module is 100Ah and the rated capacity of the second battery module is 50Ah, when the first battery module is charged to 50% of its rated capacity, that is, when the uncharged battery capacity of the first battery module is 50Ah, the charging voltage of the first battery module is V0, and V0 is set to the aforementioned preset threshold.

[0082] Of course, when the rated capacity of the first battery module is higher than that of the second battery module, the state parameters of the first battery module can also be set to a preset threshold when the uncharged battery capacity of the first battery module is not equal to the rated capacity of the second battery module. For example, the charging voltage of the first battery module can be the preset threshold when the uncharged battery capacity of the first battery module is 80% of the rated capacity of the second battery module, etc., and there are no limitations here.

[0083] In step 402 above, when the charging device determines that the state parameters of the first battery module are less than a preset threshold, the battery management unit can control the first battery module and the charging device to form a first charging circuit, so that the charging device can charge the first battery module using the charging rate of the first charging circuit.

[0084] The charging rate of the first charging circuit can be the maximum charging rate that the first battery module can withstand; or it can be greater than the maximum charging rate that the second battery module can withstand, but less than the maximum charging rate that the first battery module can withstand.

[0085] For example, such as Figure 5 As shown, when the above state parameter is voltage and the preset threshold is V0, if the charging voltage of the first battery module is less than V0, that is, the first battery module is not charged to 50% of its rated capacity, the battery management unit controls the switch unit to be in the first working state, so that the charging device and the first battery module form a charging circuit, and the charging device charges the first battery module using the maximum charging rate that the first battery module can withstand.

[0086] In addition, after the first battery module and the charging device form a first charging circuit, the charging device can charge the first battery module at a fixed charging rate.

[0087] In some embodiments, after step S402, the method may further include: Obtain the charged battery capacity of the first battery module mentioned above; Based on the charged battery capacity of the first battery module, the charging rate of the first charging circuit is updated.

[0088] Based on this, during the process of the charging device charging the first battery module through the first charging circuit, a charging rate determined based on the charged battery capacity of the first battery module can be used to charge the first battery module, thereby enabling the charging rate to be adjusted according to the amount of charging.

[0089] The determination of the charging rate of the first charging circuit based on the charged battery capacity of the first battery module can be achieved by pre-setting a correspondence between the charged battery capacity and the charging rate in the battery device. The battery device can determine the charging rate corresponding to the charged battery capacity of the first battery module based on the pre-set correspondence, and use it as the charging rate of the first charging circuit.

[0090] In addition, the charged battery capacity of the first battery module and the charging rate of the first charging circuit can have a linear relationship.

[0091] Specifically, the first charging rate, determined based on the first charged battery capacity of the first battery module, may be higher than the second charging rate, determined based on the second charged battery capacity of the first battery module, wherein the first charged battery capacity is lower than the second charged battery capacity.

[0092] Based on this, as the capacity of the charged battery in the first battery module increases, the charging rate of the first charging circuit can be reduced, thereby not only ensuring the charging speed but also improving the safety during the charging process.

[0093] For example, assuming the rated capacity of the first charging module is 100Ah and the rated capacity of the second charging module is 50Ah, and the preset current value is 100A, i.e., the unit charging rate 1C = 100A / 100Ah. Then, when the first battery module and the charging device form a first charging circuit, the first charging module can be charged to 30% of its rated capacity using a first charging rate of 1.5C (i.e., charging current of 150A), i.e., the charged battery capacity is 30Ah (i.e., the first charged battery capacity); then, a second charging rate of 1C (i.e., charging current of 100A) can be used to charge from 30% of the rated capacity to 50% of the rated capacity, i.e., from 30Ah to 50Ah (i.e., the second charged battery capacity).

[0094] In step 403 above, when the charging device determines that the state parameter of the first battery module is greater than or equal to a preset threshold, the battery management unit can control the first battery module, the second battery module and the charging device to form a second charging circuit, so that the charging device can charge the first battery module and the second battery module simultaneously using the charging rate of the second charging circuit.

[0095] Wherein, the charging rate of the second charging circuit is less than the charging rate of the first charging circuit. That is, during the charging process, when the state parameter of the first battery module rises to a preset threshold due to charging, the charging rate output to the battery device is reduced from the charging rate of the first charging circuit to the charging rate of the second charging circuit.

[0096] It should be noted that the charging rate of the second charging circuit mentioned above can be the maximum charging rate that the second battery module can withstand, or it can be less than the maximum charging rate that the second battery module can withstand; there is no limitation here.

[0097] For example, such as Figure 5As shown, assuming the rated capacity of the first charging module is 100Ah and the rated capacity of the second charging module is 50Ah, and the preset current value is 100A, i.e., the unit charging rate 1C = 100A / 100Ah, then, when the first battery module, the second battery module, and the charging device form a second charging circuit, the second battery module can only withstand a charging rate of 0.5C (i.e., a charging current of 50A). At this time, the charging current charges both the first and second battery modules simultaneously at a charging rate of 0.5C.

[0098] In addition, the charging device uses the charging rate of the first charging circuit to charge the first battery module. This can be achieved by the battery management unit sending a charging request indicating the charging rate of the first charging circuit to the charging device when the first charging circuit is formed. The charging device then responds to the charging request and charges the first battery module using the charging rate of the first charging circuit. Similarly, the process of the charging device using the charging rate of the second charging circuit to charge the first battery module and the second battery module is similar and will not be described in detail here.

[0099] Of course, after the charging device uses the charging rate of the second charging circuit to charge the first battery module and the second battery module, if the battery management unit detects that the status parameters of the first battery module or the second battery module have reached the maximum preset threshold, the battery management unit can send a stop charging request to the charging device so that the charging device stops charging the first battery module and the second battery module.

[0100] The battery device according to embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0101] Figure 6 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application. Figure 6 As shown, the battery device 600 includes a status parameter acquisition module 601 and a control module 602.

[0102] The status parameter acquisition module 601 is used to acquire the status parameters of the first battery module in the above-mentioned battery device.

[0103] Control module 602 is used for: When the state parameters of the first battery module are less than a preset threshold, the first battery module is controlled to form a first charging circuit with the charging device. When the state parameters of the first battery module are greater than or equal to the preset threshold, the first battery module, the second battery module in the battery device, and the charging device are connected in series to form a second charging circuit.

[0104] The charging rate of the first charging circuit is higher than that of the second charging circuit.

[0105] In this embodiment, since the charging rate of the first charging circuit is higher than that of the second charging circuit, during the charging process, different charging rates can be used to charge the battery modules forming the charging circuit with the charging device, based on a comparison between the state parameters of the first battery module and a preset threshold. Specifically, if the state parameters of the first battery module are less than the preset threshold, the first charging circuit is charged using its own charging rate; conversely, if the state parameters of the first battery module rise to a level greater than or equal to the preset threshold, the charging rate of the second charging circuit is used to charge both the first and second battery modules simultaneously. This improves charging speed compared to the current method of using the lower of the two battery modules' tolerance rates, while ensuring charging safety.

[0106] In some embodiments, the above-described device 600 may further include a charged battery capacity acquisition module and a charging rate update module.

[0107] The charged battery capacity acquisition module is used to acquire the charged battery capacity of the first battery module mentioned above.

[0108] The charging rate update module is used to update the charging rate of the first charging circuit based on the charged battery capacity of the first battery module.

[0109] In this embodiment, during the process of the charging device charging the first battery module through the first charging circuit, a charging rate determined based on the charged battery capacity of the first battery module can be used to charge the first battery module, thereby enabling the charging rate to be adjusted according to the amount of charging.

[0110] In some implementations, the first charging rate determined based on the first charged battery capacity of the first battery module may be higher than the second charging rate determined based on the second charged battery capacity of the first battery module, wherein the first charged battery capacity is lower than the second charged battery capacity.

[0111] In this embodiment, as the capacity of the charged battery in the first battery module increases, the charging rate of the first charging circuit can be reduced, thereby ensuring not only the charging speed but also improving the safety during the charging process.

[0112] In some implementations, the aforementioned state parameters may include the aforementioned state of charge (SOC) or voltage.

[0113] In this embodiment, the method of obtaining the state parameters of the first battery module can be simple and flexible.

[0114] In some embodiments, when the rated capacity of the first battery module is higher than the rated capacity of the second battery module, if the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, then the state parameter of the first battery module can be equal to the preset threshold.

[0115] In this embodiment, when the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, a smaller charging rate can be switched to charge the first and second battery modules. This not only improves the charging speed but also ensures charging safety.

[0116] Other details of the battery device according to embodiments of this application, in conjunction with the above. Figure 3 The control method of the battery device described in the example is similar and can achieve the corresponding technical effect. For the sake of brevity, it will not be described in detail here.

[0117] Figure 7 This is a system architecture diagram of a battery system provided in an embodiment of this application. Figure 7 As shown, the battery control system includes the aforementioned charging device 100 and battery device 200.

[0118] The charging device 100 is combined with the above embodiments of this application. Figures 1-4 The charging device 100 shown in any of the accompanying drawings is similar, and its specific details can be found in the above description of the charging device 100 in the embodiments of this application, which will not be repeated here.

[0119] The battery device 200 is combined with the above embodiments of this application. Figures 1-4 The battery device 200 shown is similar, and its details can be found in the above description of the battery device 200 in the embodiments of this application, which will not be repeated here.

[0120] Figure 8 A schematic diagram of the hardware structure of the battery device provided in an embodiment of this application is shown.

[0121] The battery device may include a processor 801 and a memory 802 storing computer program instructions.

[0122] Specifically, the processor 801 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0123] Memory 802 may include mass storage for data or instructions. For example, and not limitingly, memory 802 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. In some instances, memory 802 may include removable or non-removable (or fixed) media, or memory 802 may be a non-volatile solid-state memory. In some embodiments, memory 802 may be internal to or external to a battery device.

[0124] In some instances, memory 802 may be read-only memory (ROM). In one instance, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0125] Memory 802 may include read-only memory (ROM), random access memory (RAM), disk storage media device, optical storage media device, flash memory device, electrical, optical, or other physical / tangible memory storage device. Therefore, generally, memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of this disclosure.

[0126] The processor 801 reads and executes computer program instructions stored in the memory 802 to achieve... Figure 4 The method in the illustrated embodiment achieves... Figure 4 The technical effects achieved by executing the methods / steps shown in the examples are not elaborated here for the sake of brevity.

[0127] In one example, the battery device may also include a communication interface 803 and a bus 804. For example, Figure 8 As shown, the processor 801, memory 802, and communication interface 803 are connected through bus 804 and complete communication with each other.

[0128] The communication interface 803 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0129] Bus 804 includes hardware, software, or both, that couples components of an online data traffic metering device together. For example, and not as a limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 804 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, this application contemplates any suitable bus or interconnect.

[0130] The battery device can execute the control method of the battery device in the embodiments of this application, thereby achieving combination. Figures 1 to 6 The battery device and its control method are described.

[0131] Furthermore, in conjunction with the control method and battery device of the battery device in the above embodiments, this application embodiment can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the batteries and their control methods in the above embodiments.

[0132] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0133] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0134] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0135] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatuses, devices, and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowchart illustrations, and combinations of blocks in the block diagrams and / or flowchart illustrations, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0136] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A method for controlling a battery device, comprising: Obtain the status parameters of the first battery module in the battery device; When the state parameters of the first battery module are less than a preset threshold, the first battery module is controlled to form a first charging circuit with the charging device; When the state parameter of the first battery module is greater than or equal to the preset threshold, the first battery module, the second battery module in the battery device and the charging device are connected in series to form a second charging circuit. The charging rate of the first charging circuit is higher than that of the second charging circuit.

2. The control method according to claim 1, wherein, The method further includes: Obtain the charged battery capacity of the first battery module; The charging rate of the first charging circuit is updated based on the charged battery capacity of the first battery module.

3. The control method according to claim 2, wherein, The first charging rate, determined based on the first charged battery capacity of the first battery module, is higher than the second charging rate, determined based on the second charged battery capacity of the first battery module, and the first charged battery capacity is lower than the second charged battery capacity.

4. The control method according to claim 2, wherein, Based on the charged battery capacity of the first battery module, the charging rate of the first charging circuit is updated, including: Based on the preset correspondence between charged battery capacity and charging rate, the charging rate corresponding to the charged battery capacity of the first battery module is determined and used as the charging rate of the first charging circuit.

5. The control method according to claim 1, wherein, The state parameters include the state of charge (SOC) or voltage.

6. The control method according to claim 1, wherein, If the rated capacity of the first battery module is higher than the rated capacity of the second battery module, and the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, then the state parameter of the first battery module is equal to the preset threshold.

7. The control method according to any one of claims 1-6, wherein, The preset threshold is greater than zero and less than or equal to the state parameter of the first battery module when the charged battery capacity is the rated capacity.

8. The control method according to any one of claims 1-6, wherein, The charging rate of the first charging circuit is greater than the maximum charging rate that the second battery module can withstand, and less than or equal to the maximum charging rate that the first battery module can withstand.

9. A battery device, comprising: First battery module and second battery module; A switching unit is connected to the first battery module and the second battery module. The switching unit is in a first working state or a second working state. When the charging device charges the battery and the switching unit is in the first working state, the first battery module and the charging device form a first charging circuit. When the charging device charges the battery and the switching unit is in the second working state, the first battery module, the second battery module and the charging device are connected in series to form a second charging circuit. A battery management unit is connected to the switch unit and the first battery module. The battery management unit is used to: control the switch unit to be in the first working state when the state parameter of the first battery module is less than a preset threshold; and control the switch unit to be in the second working state when the state parameter of the first battery module is greater than or equal to the preset threshold, wherein the charging rate of the first charging circuit is higher than the charging rate of the second charging circuit.

10. The battery device according to claim 9, wherein, The first end of the first battery module is used to connect to the second end of the charging device when the charging device is charging the battery device. The switching unit includes: A first switch, wherein a first end of the first switch is connected to the battery management unit, and the first end of the first switch is further configured to: connect to the first end of the charging device when the charging device is charging the battery device; a second end of the first switch is connected to the second end of the first battery module; and a third end of the first switch is connected to the first end of the second battery module. The second switch has a first end connected to the second end of the first switch and a second end connected to the second end of the second battery module. In the case where the charging device is charging the battery device, if the first terminal of the first switch is connected to the second terminal of the first switch and the first terminal of the second switch is disconnected from the second terminal of the second switch, then the first battery module and the charging device form the first charging circuit; if the first terminal of the first switch is connected to the third terminal of the first switch and the first terminal of the second switch is connected to the second terminal of the second switch, then the first battery module, the second battery module and the charging device are connected in series to form the second charging circuit.

11. The battery device according to claim 9, wherein, The first battery module includes M first battery cells, and the second battery module includes N second battery cells, where M and N are both integers greater than 1. When M is less than or equal to N, at least one of the N second battery cells is disposed between two adjacent first battery cells among the M first battery cells. When M is greater than N, at least one of the M first battery cells is disposed between two adjacent second battery cells among the N second battery cells.

12. The battery device according to claim 11, wherein, The energy density of the first battery cell is greater than or equal to 150Wh / kg, and the energy density of the second battery cell is greater than or equal to 230Wh / kg.

13. The battery device according to claim 11, wherein, The energy density of the first battery cell is greater than or equal to 170Wh / kg, and the energy density of the second battery cell is greater than or equal to 250Wh / kg.

14. The battery device according to claim 11, wherein, The ratio between the rated capacity of the first battery cell and the rated capacity of the second battery cell is greater than or equal to 1 and less than or equal to 5.

15. The battery device according to claim 14, wherein, The ratio is greater than or equal to 1.3 and less than or equal to 2.

5.

16. A battery device, comprising: A status parameter acquisition module is used to acquire the status parameters of the first battery module in the battery device. The control module is used for: When the state parameters of the first battery module are less than a preset threshold, the first battery module is controlled to form a first charging circuit with the charging device; When the state parameter of the first battery module is greater than or equal to the preset threshold, the first battery module, the second battery module in the battery device and the charging device are connected in series to form a second charging circuit. The charging rate of the first charging circuit is higher than that of the second charging circuit.

17. The battery device according to claim 16, further comprising: A charged battery capacity acquisition module is used to acquire the charged battery capacity of the first battery module; The charging rate update module is used to update the charging rate of the first charging circuit based on the charged battery capacity of the first battery module.

18. The battery device according to claim 17, wherein, The first charging rate, determined based on the first charged battery capacity of the first battery module, is higher than the second charging rate, determined based on the second charged battery capacity of the first battery module, and the first charged battery capacity is lower than the second charged battery capacity.

19. The battery device according to claim 16, wherein, The state parameters include the state of charge (SOC) or voltage.

20. The battery device according to claim 16, wherein, If the rated capacity of the first battery module is higher than the rated capacity of the second battery module, and the uncharged battery capacity of the first battery module is equal to the rated capacity of the second battery module, then the state parameter of the first battery module is equal to the preset threshold.

21. A battery device, characterized in that, The battery device includes: a processor and a memory storing computer program instructions; The processor reads and executes the computer program instructions to implement the control method of the battery device as described in any one of claims 1-8.

22. A computer storage medium, characterized in that, The computer storage medium stores computer program instructions, which, when executed by a processor, implement the control method of the battery device as described in any one of claims 1-8.

23. A power equipment, characterized in that, Includes the battery device according to any one of claims 9-15.

24. The power equipment according to claim 23, characterized in that, The battery device includes a first battery module and a second battery module; The first battery module and the second battery module each provide electrical energy to the power equipment individually; or, The first battery module and the second battery module work together to provide electrical energy to the power equipment.

25. A charging system, wherein, Includes charging equipment and the battery device as described in any one of claims 9-15.

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