Battery architecture and control method thereof, and electric device

Abstract

The embodiment of the present application discloses a battery architecture, a control method thereof and a power consumption device. The battery architecture comprises a battery pack, the battery pack comprises: a first battery module outputting a first nominal voltage; the first battery module is used for supplying power to a first function module; a second battery module outputting a second nominal voltage; the second battery module is connected in series with the first battery module, and the second battery module and the first battery module jointly supply power to a second function module; wherein, the working voltage of the second function module is higher than the working voltage of the first function module. Compared with the prior art, the embodiment of the present application realizes the simultaneous provision of low-voltage power supply and high-voltage power supply, thereby being conducive to meeting the complex function and performance requirements of the power consumption device.

Description

Technical Field

[0001] This invention relates to the field of power management technology, and in particular to a battery architecture and its control method, and an electrical device. Background Technology

[0002] With the development of technology, the application of electrical equipment such as mobile devices, electric vehicles, and artificial intelligence devices is becoming increasingly widespread. Taking mobile devices as an example, this article explains the battery architecture of electrical equipment. The internal power management architecture of mobile devices on the market is basically the same, using a lithium battery with a voltage of about 4V for energy storage. The power supply voltage is converted through a low dropout regulator (LDO) or a DC / DC power converter, converting the 4V voltage output by the lithium battery into the actual operating voltage required by the internal functional modules.

[0003] Current mobile devices operate at relatively low voltages for their internal functional modules, allowing them to be powered by a single lithium battery with a low output voltage. However, with the development of 5G technology, the application of GaN radio frequency (RF) devices in mobile devices has become a technological trend. Typically, GaN RF devices require an operating voltage of 28V or higher to demonstrate their performance advantages. Existing battery architectures can use DC / DC boost converters to convert the 4V power supply from traditional lithium batteries to the high voltage required by GaN RF devices. However, the large voltage difference between the input and output of the boost converter leads to low energy efficiency, further causing problems such as excessive heat generation and significantly reduced standby time in mobile devices and other electronic devices. Summary of the Invention

[0004] This invention provides a battery architecture and its control method, as well as an electrical device, to meet the needs of low-voltage and high-voltage power supply inside the electrical device and to meet the complex functional and performance requirements of the electrical device.

[0005] In a first aspect, embodiments of the present invention provide a battery architecture, including a battery pack, the battery pack comprising:

[0006] The first battery module outputs a first nominal voltage; the first battery module is used to supply power to the first functional module.

[0007] The second battery module outputs a second nominal voltage; the second battery module is connected in series with the first battery module, and the second battery module and the first battery module together supply power to the second functional module;

[0008] The operating voltage of the second functional module is higher than that of the first functional module.

[0009] Optionally, the battery architecture also includes:

[0010] A first DC-DC converter circuit is connected between the battery pack and the first functional module; the first DC-DC converter circuit is used to convert the first nominal voltage output by the first battery module into the operating voltage of the first functional module.

[0011] A second DC-DC converter circuit is connected between the battery pack and the second functional module; the second DC-DC converter circuit is used to convert the series voltage of the first battery module and the second battery module into the operating voltage of the second functional module.

[0012] Optionally, the second battery module is also used to supply power to a third functional module, the operating voltage of which is lower than that of the second functional module.

[0013] Optionally, the battery architecture also includes:

[0014] A third DC-DC converter circuit is connected between the battery pack and the third functional module; the third DC-DC converter module is used to convert the second nominal voltage output by the second battery module into the operating voltage of the third functional module.

[0015] Optionally, the battery pack includes a first power supply output terminal, a second power supply output terminal, and a third power supply output terminal; the first power supply output terminal outputs the second nominal voltage and the sum of the first nominal voltages, the second power supply output terminal outputs the second nominal voltage, and the third power supply output terminal outputs the first nominal voltage;

[0016] The battery architecture also includes:

[0017] A power supply path control circuit is used to control the second functional module to be powered by the first power supply output terminal, the second power supply output terminal, or the third power supply output terminal;

[0018] The fourth DC-DC converter circuit is used to convert the voltage of the second power supply output terminal or the third power supply output terminal into the operating voltage of the second functional module.

[0019] Optionally, the power supply path control circuit includes:

[0020] The detection and control module is used to detect the remaining power of the first battery module and the second battery module;

[0021] The first switch is connected between the third power supply output terminal and the fourth DC-DC converter circuit; the first switch is controlled by the detection and control module, which controls the first switch to turn on when the power of the second battery module is detected to be depleted.

[0022] The second switch is connected between the third power supply output terminal and the fourth DC-DC converter circuit; the second switch is controlled by the detection and control module, which controls the second switch to turn on when the power of the first battery module is detected to be depleted.

[0023] Optionally, the fourth DC-DC converter circuit is a switching DC / DC power conversion topology.

[0024] Optionally, the first nominal voltage and the second nominal voltage are the same;

[0025] Alternatively, the first nominal voltage and the second nominal voltage are different.

[0026] Optionally, the nominal capacity of the first battery module and the nominal capacity of the second battery module are the same;

[0027] Alternatively, the nominal capacity of the first battery module may differ from the nominal capacity of the second battery module.

[0028] Optionally, the battery pack further includes:

[0029] The third battery module outputs a third nominal voltage; the third battery module, the second battery module, and the first battery module are connected in series.

[0030] The third battery module, the second battery module, and the first battery module together supply power to the second functional module.

[0031] Alternatively, the third battery module and the first battery module can jointly power the second functional module;

[0032] Alternatively, the third battery module and the second battery module can jointly power the second functional module.

[0033] Secondly, embodiments of the present invention also provide a control method for a battery architecture, applicable to the battery architecture provided in any embodiment of the present invention, the control method comprising:

[0034] Control the first battery module to supply power to the first functional module;

[0035] The second battery module and the first battery module are controlled to jointly supply power to the second functional module.

[0036] Optionally, the control method further includes:

[0037] When the power of the second battery module is detected to be depleted, the first battery module is controlled to supply power to the second functional module;

[0038] When the first battery module is detected to be depleted, the second battery module is controlled to supply power to the second functional module.

[0039] Thirdly, embodiments of the present invention also provide an electrical device, including a battery architecture as described in any embodiment of the present invention.

[0040] This invention provides a battery pack comprising a first battery module and a second battery module, connected in series. The first battery module supplies power to a first functional module with a lower operating voltage, while both modules supply power to a second functional module with a higher operating voltage. This effectively provides different supply voltages to the low-voltage and high-voltage functional modules, eliminating the need for a boost converter with a large input-output voltage difference for the high-voltage second functional module. Therefore, this invention improves energy efficiency, avoids excessive overheating in electrical equipment, and extends standby time. It meets the needs of both low-voltage and high-voltage power supply within electrical equipment, promotes the use of high-voltage functional modules (such as GaN RF devices), and satisfies the complex functional and performance requirements of electrical equipment. Furthermore, the battery architecture provided by this invention is simple in structure and low in cost, facilitating widespread application. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a battery architecture provided in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of another battery architecture provided in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of another battery architecture provided in an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of another battery architecture provided in an embodiment of the present invention;

[0045] Figure 5 This is a schematic diagram of another battery architecture provided in an embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram of another battery architecture provided in an embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram of another battery architecture provided in an embodiment of the present invention;

[0048] Figure 8This is a schematic diagram of another battery architecture provided in an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of another battery architecture provided in an embodiment of the present invention;

[0050] Figure 10 A flowchart illustrating a control method for a battery architecture provided in an embodiment of the present invention;

[0051] Figure 11 This is a flowchart illustrating a control method for another battery architecture provided in an embodiment of the present invention. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0053] This invention provides a battery architecture suitable for power-consuming devices such as mobile devices, electric vehicles, and artificial intelligence devices. Figure 1 This is a schematic diagram of a battery architecture provided in an embodiment of the present invention. See also... Figure 1 The battery architecture includes a battery pack 100, which includes a first battery module 101 and a second battery module 102. The first battery module 101 outputs a first nominal voltage V1 and is used to supply power to a first functional module 201. The second battery module 102 outputs a second nominal voltage V2 and is connected in series with the first battery module 101. The second battery module 102 and the first battery module 101 together supply power to the second functional module 202.

[0054] The second functional module 202 operates at a higher voltage than the first functional module 201. Both the first and second functional modules 201 are power-consuming modules. The first functional module 201 can be, for example, a display screen, touch module, microphone, or speaker, while the second functional module 202 can be, for example, a GaN RF device. The first functional module 201 operates at a low voltage, while the second functional module 202 operates at a high voltage. Each battery module and the second battery module 102 are two independent battery modules. The first nominal voltage V1 of the first battery module 101 and the second nominal voltage V2 of the second battery module 102 can be the same or different; and the nominal capacity C1 of the first battery module 101 and the nominal capacity C2 of the second battery module 102 can be the same or different.

[0055] The first battery module 101 and the second battery module 102 are connected in series. Therefore, the voltage output by the battery pack 100 can reach the sum of the first nominal voltage V1 and the second nominal voltage V2, namely V1+V2. The second battery module 102 and the first battery module 101 jointly supply power to the second functional module 202. That is, the voltage V1+V2 output by the battery pack 100 is used to supply power to the second functional module 202.

[0056] Therefore, the battery pack 100 in this embodiment of the invention includes a first battery module 101 and a second battery module 102. The first battery module 101 and the second battery module 102 are connected in series. The first battery module 101 supplies power to the first functional module 201 with a lower operating voltage, forming a first power supply path 901. The first battery module 101 and the second battery module 102 jointly supply power to the second functional module 202 with a higher operating voltage, forming a second power supply path 902. This is equivalent to providing different power supply paths and voltages for the low-operating-voltage and high-operating-voltage functional modules, thus eliminating the need for a boost converter with a large input and output voltage difference for the high-operating-voltage second functional module 202. Therefore, this embodiment of the invention is beneficial for improving energy efficiency, avoiding severe overheating of electrical equipment, and extending standby time. It can meet the needs of low-voltage and high-voltage power supply within electrical equipment, promote the use of high-operating-voltage functional modules (such as GaN RF devices) in electrical equipment, and meet the complex functional and performance requirements of electrical equipment. Furthermore, based on achieving the above-mentioned beneficial effects, the battery architecture provided by the embodiments of the present invention has a simple structure and low cost, which is conducive to its widespread application.

[0057] Based on the above embodiments, the battery architecture also includes peripheral circuitry. Optionally, the peripheral circuitry may include, for example, a voltage regulation circuit disposed between the battery pack 100 and the functional module to improve the accuracy and stability of the power supply from the battery pack 100. Figure 2 A schematic diagram of another battery architecture provided in an embodiment of the present invention is shown below. Figure 2 In one embodiment of the present invention, optionally, the peripheral circuitry includes: a first DC-DC converter circuit 301 and a second DC-DC converter circuit 302. The first DC-DC converter circuit 301 is connected between the battery pack 100 and the first functional module 201; the first DC-DC converter circuit 301 is used to convert the first nominal voltage V1 output by the first battery module 101 into the operating voltage of the first functional module 201. The second DC-DC converter circuit 302 is connected between the battery pack 100 and the second functional module 202; the second DC-DC converter circuit 302 is used to convert the series voltage V1+V2 of the first battery module 101 and the second battery module 102 into the operating voltage of the second functional module 202.

[0058] Since the nominal voltage V1 of the first battery module 101 has a low amplitude and supplies power to the first functional module 201 with a lower operating voltage, the voltages of the first battery module 101 and the first functional module 201 are matched. Therefore, the first DC-DC converter circuit 301 can be configured as a first-stage voltage regulation circuit to achieve voltage regulation and stabilization. Correspondingly, since the series voltage V1+V2 has a high amplitude and supplies power to the second functional module 202 with a higher operating voltage, the series voltage V1+V2 is matched to the voltage of the second functional module 202. Therefore, the second DC-DC converter circuit 302 can be configured as a first-stage voltage regulation circuit to achieve voltage regulation and stabilization. The first DC-DC converter circuit 301 and the second DC-DC converter circuit 302 can be low-dropout linear regulators (LDOs) or switching voltage converters (DC / DC converters).

[0059] Therefore, the embodiments of the present invention, by setting the first battery module 101 and the second battery module 102 to be connected in series, the first battery module 101 is used to supply power to the first functional module 201 with a lower operating voltage, and the first battery module 101 and the second battery module 102 together supply power to the second functional module 202 with a higher operating voltage, which helps to simplify the setting of the voltage regulation circuit, reduce costs, and reduce energy consumption.

[0060] Figure 3 See also the schematic diagram of another battery architecture provided in this embodiment of the invention. Figure 3 In one embodiment of the present invention, optionally, the second battery module 102 is also used to supply power to the third functional module 203 of the electrical device, wherein the operating voltage of the third functional module 203 is lower than that of the second functional module 202. Similar to the second functional module 202, the third functional module 203 is also a low-operating-voltage functional module; therefore, the nominal voltage of the second battery module 102 can be matched with the operating voltage of the third functional module 203. The first battery module 101 provides a first nominal voltage V1 to the first functional module 201, forming a first power supply path 901; the second battery module 102 provides a second nominal voltage V2 to the third functional module 203, forming a third power supply path 903; the first battery module 101 and the second battery module 102 are connected in series to form a series battery pack 100 providing voltage V1+V2, and the second functional module 202 providing high-voltage power supply, forming a second power supply path 902. For example, by setting the first nominal voltage V1 and the second nominal voltage V2 to be unequal, the battery pack 100 can generate three different amplitude power supply voltages. Specifically, voltages V1, V2, and V1+V2 are provided, where voltages V1 and V2 are used to power functional modules operating at low to medium voltages, and voltage V1+V2 is used to power functional modules operating at high voltages. This embodiment of the invention can provide three power supply voltages to meet more efficient power supply requirements.

[0061] In this embodiment of the invention, the second battery module 102 can also supply power to the third functional module 203, expanding the power supply path of the battery pack 100 and improving the performance of the battery architecture. Furthermore, this embodiment of the invention arranges the first battery module 101 and the second battery module 102 to each provide two power supply paths, which is beneficial for setting the first battery module 101 and the second battery module 102 to have the same capacity.

[0062] Optionally, the third functional module 203 and the second functional module 202 are the same functional module, which can be powered by either the first battery module 101 or the second battery module 102. Specifically, by setting a switching circuit, the switching between power supply from the first battery module 101 and the second battery module 102 can be realized.

[0063] Figure 4 See also the schematic diagram of another battery architecture provided in this embodiment of the invention. Figure 4 In one embodiment of the present invention, the battery architecture may optionally include a third DC-DC converter circuit 303. The third DC-DC converter circuit 303 is connected between the battery pack 100 and the third functional module 203; the third DC-DC converter module is used to convert the second nominal voltage V2 output by the second battery module 102 into the operating voltage of the third functional module 203, so as to realize the function of voltage regulation and stabilization of the output voltage of the third battery module.

[0064] Based on the above embodiments, this invention also provides a power supply path control scheme to meet more application scenarios. Figure 5 See also the schematic diagram of another battery architecture provided in this embodiment of the invention. Figure 5 In one embodiment of the present invention, optionally, the battery pack 100 includes a first power supply output terminal 01, a second power supply output terminal 02, and a third power supply output terminal 03; the first power supply output terminal 01 outputs the sum of a second nominal voltage V2 and a first nominal voltage V1, the second power supply output terminal 02 outputs the second nominal voltage V2, and the third power supply output terminal 03 outputs the first nominal voltage V1. The battery architecture also includes a power supply path control circuit 400 and a fourth DC-DC converter circuit 304. The power supply path control circuit 400 is used to control the second functional module 202 to be powered by the first power supply output terminal 01, the second power supply output terminal 02, or the third power supply output terminal 03. The fourth DC-DC converter circuit 304 is used to convert the voltage of the second power supply output terminal 02 or the third power supply output terminal 03 into the operating voltage of the second functional module 202.

[0065] The fourth DC-DC converter 304 is used to convert low voltage to high voltage. The fourth DC-DC converter 304 is a boost converter. The structure of the fourth DC-DC converter 304 can be, for example, a switching DC / DC power conversion topology.

[0066] For example, the battery architecture operates as follows: the power supply path control circuit 400 monitors the remaining power information of the first battery module 101 and the second battery module 102 in real time; when the first battery module 101 is found to be depleted, the second battery module 102 is controlled to supply power to the first functional module 201, which was originally powered by the first battery module 101, and the fourth DC-DC converter circuit 304 is activated; the second nominal voltage V2 provided by the second battery module 102 is boosted and used to power the second functional module 202. Similarly, when the second battery module 102 is found to be depleted, the first battery module 101 is controlled to supply power to the second functional module 202, which was originally powered by the second battery module 102, and the fourth DC-DC converter circuit 304 is activated; the first nominal voltage V1 provided by the first battery module 101 is boosted and used to power the second functional module 202.

[0067] In actual use of electrical equipment, either the first battery module 101 or the second battery module 102 may run out of power prematurely, causing the series battery pack 100 to be unable to continue providing high-voltage power to the second functional module 202. This embodiment of the invention solves the problem of power matching between the first battery module 101 and the second battery module 102 at a lower cost by setting up a power supply path control circuit 400 and a fourth DC-DC converter circuit 304 to increase the backup high-voltage power supply path.

[0068] The specific setup of the power supply control circuit is explained below. Figure 6 This is a schematic diagram of another battery architecture provided in an embodiment of the present invention. See also... Figure 6 In one embodiment of the present invention, optionally, the power supply path control circuit 400 includes: a detection and control module 401, a first switch S1, and a second switch S2. The detection and control module 401 is used to detect the remaining power of the first battery module 101 and the second battery module 102; the first switch S1 is connected between the third power supply output terminal 03 and the fourth DC-DC converter circuit 304; the first switch S1 is controlled by the detection and control module 401, and when the power of the second battery module 102 is detected to be depleted, the first switch S1 is controlled to turn on. The second switch S2 is connected between the third power supply output terminal 03 and the fourth DC-DC converter circuit 304; the second switch S2 is controlled by the detection and control module 401, and when the power of the first battery module 101 is detected to be depleted, the second switch S2 is controlled to turn on.

[0069] For example, the battery architecture operates as follows: the detection and control module 401 monitors the remaining power information of the first battery module 101 and the second battery module 102 in real time; when the first battery module 101 is found to be depleted, the second battery module 102 is controlled to supply power to the first functional module 201, which was originally powered by the first battery module 101, while simultaneously turning on the second switch S2, turning off the first switch S1, and starting the fourth DC-DC converter circuit 304; the second nominal voltage V2 provided by the second battery module 102 is boosted and used to power the second functional module 202. Similarly, when the second battery module 102 is found to be depleted, the first battery module 101 is controlled to supply power to the second functional module 202, which was originally powered by the second battery module 102, while simultaneously turning on the first switch S1, turning off the second switch S2, and starting the fourth DC-DC converter circuit 304; the first nominal voltage V1 provided by the first battery module 101 is boosted and used to power the second functional module 202.

[0070] The power supply path control circuit 400 of this invention includes a detection and control module 401, a first switch S1 and a second switch S2 to realize the switching of the power supply path. The circuit structure is simple, the cost is low and it is easy to implement.

[0071] It should be noted that the above embodiments exemplify that the battery pack 100 includes two battery modules, and are not intended to limit the invention. In other embodiments, the number of battery modules in the battery pack 100 may be three, four, or more, as needed. The following description uses a battery pack 100 including three battery modules as an example.

[0072] The battery pack 100 includes a first battery module 101, a second battery module 102, and a third battery module 103. The first battery module 101 outputs a first nominal voltage V1, the second battery module 102 outputs a second nominal voltage V2, and the third battery module 103 outputs a third nominal voltage V3. The third battery module 103, the second battery module 102, and the first battery module 101 are connected in series. Optionally, as... Figure 7 As shown, the third battery module 103, the second battery module 102, and the first battery module 101 jointly supply power to the second functional module 202, providing voltages V1+V2+V3. Optionally, as... Figure 8 As shown, the third battery module 103 and the first battery module 101 jointly supply power to the second functional module 202, providing voltages V1+V3. Optionally, as... Figure 9 As shown, the third battery module 103 and the second battery module 102 together supply power to the second functional module 202, providing voltage V2+V3.

[0073] It should be noted that the above embodiments exemplify some implementation methods of battery capacity and charging path, and are not intended to limit the present invention. In other embodiments, settings can be made according to actual needs.

[0074] This invention also provides an electrical device, such as a mobile device, an electric vehicle, or an artificial intelligence device. This electrical device includes the battery architecture provided in any embodiment of this invention, and its technical principles and effects are similar, so they will not be described again.

[0075] This invention also provides a control method for a battery architecture, which is applicable to the battery architecture provided in any embodiment of this invention. Figure 10 This is a schematic flowchart illustrating a control method for a battery architecture provided in an embodiment of the present invention. See also... Figure 10 The control method includes the following steps:

[0076] S110, Control the first battery module to supply power to the first functional module.

[0077] S120: Control the second battery module and the first battery module to jointly supply power to the second functional module.

[0078] In this embodiment of the invention, the first battery module supplies power to a first functional module with a lower operating voltage, and the first and second battery modules jointly supply power to a second functional module with a higher operating voltage. This is equivalent to providing different supply voltages to the low-voltage and high-voltage functional modules respectively, thus eliminating the need for a boost converter with an excessively large input-output voltage difference for the high-voltage second functional module. Therefore, this embodiment of the invention is beneficial for improving energy efficiency, avoiding severe overheating of electrical equipment, and extending standby time. It can meet the needs of low-voltage and high-voltage power supply within electrical equipment, promote the use of high-voltage functional modules (such as GaN RF devices) in electrical equipment, and satisfy the complex functional and performance requirements of electrical equipment.

[0079] Optionally, based on the above embodiments, the embodiments of the present invention can also realize the switching of power supply paths. Figure 11 This is a schematic flowchart illustrating a control method for another battery architecture provided in an embodiment of the present invention. See also... Figure 11 The control method for the battery architecture includes the following steps:

[0080] S210, Control the first battery module to supply power to the first functional module.

[0081] S220: Control the second battery module and the first battery module to jointly supply power to the second functional module.

[0082] S230: Real-time detection of the power levels of the first and second battery modules.

[0083] S240. Determine whether the first battery module and the second battery module have run out of power.

[0084] When the power of the second battery module is detected to be depleted, S250 is executed to control the first battery module to supply power to the second functional module.

[0085] When the first battery module is detected to be depleted, S260 is executed to control the second battery module to supply power to the second functional module.

[0086] In actual use of electrical equipment, either the first or second battery module may run out of power prematurely, causing the series-connected battery pack to be unable to continue providing high-voltage power to the second functional module. This embodiment of the invention solves the problem of power matching between the first and second battery modules by controlling the switching of power supply paths to increase the number of backup high-voltage power supply paths.

[0087] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A battery architecture, characterized by, The battery pack comprises: a first battery module outputting a first nominal voltage; the first battery module is configured to supply power to a first functional module; a second battery module outputting a second nominal voltage; the second battery module is connected in series with the first battery module, and the second battery module and the first battery module together supply power to a second functional module; wherein the working voltage of the second functional module is higher than the working voltage of the first functional module; further comprising: a first DC conversion circuit connected between the battery pack and the first functional module; the first DC conversion circuit is configured to convert the first nominal voltage output by the first battery module into the working voltage of the first functional module; a second DC conversion circuit connected between the battery pack and the second functional module; the second DC conversion circuit is configured to convert the series voltage of the first battery module and the second battery module into the working voltage of the second functional module; the battery pack comprises a first power supply output terminal, a second power supply output terminal and a third power supply output terminal; the first power supply output terminal outputs the sum voltage of the second nominal voltage and the first nominal voltage, the second power supply output terminal outputs the second nominal voltage, and the third power supply output terminal outputs the first nominal voltage; the battery architecture further comprises: a power supply path control circuit configured to control the second functional module to be powered by the first power supply output terminal, the second power supply output terminal or the third power supply output terminal; a fourth DC conversion circuit configured to convert the voltage of the second power supply output terminal or the third power supply output terminal into the working voltage of the second functional module.

2. The battery architecture of claim 1, wherein, The second battery module is further configured to supply power to a third functional module, and the working voltage of the third functional module is lower than the working voltage of the second functional module.

3. The battery architecture of claim 2, wherein, further comprising: a third DC conversion circuit connected between the battery pack and the third functional module; the third DC conversion circuit is configured to convert the second nominal voltage output by the second battery module into the working voltage of the third functional module.

4. The battery architecture of claim 1, wherein, The power supply path control circuit comprises: a detection and control module configured to detect the remaining capacity of the first battery module and the second battery module; a first switch connected between the third power supply output terminal and the fourth DC conversion circuit; the first switch is controlled by the detection and control module, and when it is detected that the capacity of the second battery module is exhausted, the first switch is controlled to be turned on; a second switch connected between the third power supply output terminal and the fourth DC conversion circuit; the second switch is controlled by the detection and control module, and when it is detected that the capacity of the first battery module is exhausted, the second switch is controlled to be turned on.

5. The battery architecture of claim 1, wherein, The fourth DC conversion circuit is a switching DC / DC power conversion topology.

6. The battery architecture of claim 1, wherein, The first nominal voltage and the second nominal voltage are the same; Alternatively, the first nominal voltage and the second nominal voltage are different.

7. The battery architecture of claim 1, wherein, The nominal capacity of the first battery module and the nominal capacity of the second battery module are the same; Alternatively, the nominal capacity of the first battery module and the nominal capacity of the second battery module are different.

8. The battery architecture of claim 1, wherein, The battery pack further comprises: a third battery module outputting a third nominal voltage; the third battery module, the second battery module and the first battery module are connected in series; wherein the third battery module, the second battery module and the first battery module jointly supply power to the second functional module; Alternatively, the third battery module and the first battery module jointly supply power to the second functional module; Alternatively, the third battery module and the second battery module jointly supply power to the second functional module.

9. A method of controlling a battery architecture as claimed in claim 1, characterized by, comprising: controlling the first battery module to supply power to the first functional module; controlling the second battery module and the first battery module to jointly supply power to the second functional module.

10. The method of claim 9, wherein, further comprising: controlling the first battery module to supply power to the second functional module when it is detected that the second battery module is out of power; controlling the second battery module to supply power to the second functional module when it is detected that the first battery module is out of power.

11. An electrical device, characterized by a battery architecture as claimed in any of claims 1-8.

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