Power supply control circuit, device and vehicle

Abstract

The application discloses a power supply control circuit and device and a vehicle, relates to the technical field of power supply control, and comprises a low-voltage storage battery module, a low-voltage battery module, an input end of the low-voltage battery module being connected with an output end of the low-voltage storage battery module, and an output end of the low-voltage battery module being connected with an external load, a power compensation control module, an input end of the power compensation control module being connected with the input end of the low-voltage battery module, an output end of the power compensation control module being connected with a control end of the low-voltage storage battery module, and the power compensation control module being used for controlling the low-voltage storage battery module to compensate power for the low-voltage battery module when the low-voltage battery module is in a power shortage state. The application improves the power supply control effect.

Description

Technical Field

[0001] This application relates to the field of power supply control technology, and in particular to a power supply control circuit, device, and vehicle. Background Technology

[0002] As electrical appliances become increasingly widely used in various fields, users are also placing higher demands on power supply control methods.

[0003] Traditional power supply control methods directly supply power to low-voltage loads via low-voltage batteries. This method has certain drawbacks, such as the phenomenon of low-voltage batteries running out of power due to continuous power supply, which leads to poor power supply control performance. Utility Model Content

[0004] The main objective of this application is to provide a power supply control circuit, device, and vehicle, which aims to solve the technical problem of poor power supply control performance.

[0005] To achieve the above objectives, this application provides a power supply control circuit, the power supply control circuit comprising:

[0006] High-voltage storage battery;

[0007] A low-voltage battery module, wherein the input terminal of the low-voltage battery module is connected to the output terminal of the high-voltage battery;

[0008] A low-voltage battery module, wherein the input terminal of the low-voltage battery module is connected to the output terminal of the low-voltage storage battery module, and the output terminal of the low-voltage battery module is connected to an external load;

[0009] A power replenishment control module is provided, wherein the input terminal of the power replenishment control module is connected to the input terminal of the low-voltage battery module, and the output terminal of the power replenishment control module is connected to the control terminal of the low-voltage battery module. The power replenishment control module is used to control the low-voltage battery module to replenish the low-voltage battery module when the low-voltage battery module is in a depleted state.

[0010] In one embodiment, the low-voltage battery module includes:

[0011] A low-voltage battery, wherein the positive terminal of the low-voltage battery is connected to the input terminal of the low-voltage battery module, and the negative terminal of the low-voltage battery is connected to the input terminal of the low-voltage battery module;

[0012] The selection device has a first input terminal connected to the positive terminal of the low-voltage battery, a second input terminal connected to the negative terminal of the low-voltage battery, an output terminal connected to the input terminal of the low-voltage battery module, and a control terminal connected to the output terminal of the power replenishment control module.

[0013] In one embodiment, the low-voltage battery module includes:

[0014] The first battery block has its positive terminal connected to the positive terminal of the low-voltage battery and the external load, and its negative terminal connected to the output terminal of the selection device and the external load.

[0015] The second battery block has its positive terminal connected to the negative terminal of the first battery block, and its negative terminal connected to the negative terminal of the low-voltage battery and the external load.

[0016] In one embodiment, when the external load is a first load that requires the power supply voltage of a single battery pack, the positive terminal of the first load is connected to the positive terminal of the first battery pack, and the negative terminal of the first load is connected to the negative terminal of the first battery pack.

[0017] Alternatively, the positive terminal of the first load can be connected to the positive terminal of the second battery block, and the negative terminal of the first load can be connected to the negative terminal of the second battery block.

[0018] In one embodiment, when the external load is a second load that requires the power supply voltage of the dual battery pack, the positive terminal of the second load is connected to the positive terminal of the first battery pack, and the negative terminal of the second load is connected to the negative terminal of the second battery pack.

[0019] In one embodiment, the power replenishment control module includes:

[0020] A voltage acquisition unit, wherein the input terminal of the voltage acquisition unit is connected to the output terminal of the low-voltage battery module;

[0021] A voltage comparator operational amplifier is provided, the input of which is connected to the output of the voltage acquisition unit, and the output of which is connected to the control terminal of the selected device in the low-voltage battery module.

[0022] In one embodiment, the voltage comparison operational amplifier includes a first operational amplifier input terminal and a second operational amplifier input terminal, and the voltage acquisition unit includes:

[0023] The first voltage acquisition device has its negative terminal grounded, its positive terminal connected to the positive terminal of the first battery block in the low-voltage battery module, and its output terminal connected to the input terminal of the first operational amplifier.

[0024] The second voltage acquisition device has its negative terminal grounded and its positive terminal connected to the positive terminal of the second battery block in the low-voltage battery module.

[0025] A voltage amplifier, wherein the input terminal of the voltage amplifier is connected to the output terminal of the second voltage acquisition unit, and the output terminal of the voltage amplifier is connected to the input terminal of the first operational amplifier.

[0026] In one embodiment, the electrical control circuit includes:

[0027] A first current collector is disposed between the positive terminal of the first battery cell in the low-voltage battery module and the external load.

[0028] The second current collector is disposed between the positive terminal of the second battery block in the low-voltage battery module and the external load.

[0029] A power supply controller, wherein the input terminal of the power supply controller is connected to the output terminal of the first current collector and the output terminal of the second current collector, and the output terminal of the power supply controller is connected to the control terminal of the device selected in the power supply control module.

[0030] In addition, to achieve the above objectives, this application also provides a power supply control device, which includes the power supply control circuit described above.

[0031] In addition, to achieve the above objectives, this application also provides a vehicle that includes the aforementioned power supply control device.

[0032] This application provides a power supply control circuit, including a low-voltage battery module; the low-voltage battery module has its input terminal connected to its output terminal, and its output terminal connected to an external load; and a power replenishment control module, with its input terminal connected to the input terminal of the low-voltage battery module and its output terminal connected to the control terminal of the low-voltage battery module. The power replenishment control module is used to control the low-voltage battery module to replenish power when it is in a depleted state. This power supply control circuit connects the output terminal of the low-voltage battery module to the external load to supply power, and simultaneously connects the output terminal of the power replenishment control module to the control terminal of the low-voltage battery module. Therefore, when it is determined that the low-voltage battery module is in a depleted state, the circuit controls the low-voltage battery module to replenish power, thereby avoiding the phenomenon of continuous power supply causing depletion. In other words, by using the low-voltage battery module for both power supply and power replenishment control, the power supply control effect is improved. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the framework of the first embodiment of the power supply control circuit of this application;

[0034] Figure 2 This is a connection diagram of the first embodiment of the power supply control circuit of this application;

[0035] Figure 3 This is a connection diagram of the second embodiment of the power supply control circuit of this application;

[0036] Figure 4 This is a connection diagram of the third embodiment of the power supply control circuit of this application;

[0037] Figure 5 This is a connection diagram of the fourth embodiment of the power supply control circuit of this application.

[0038] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0039] Explanation of icon numbers:

[0040] 200. External load; 10. Low-voltage battery module; 20. Low-voltage battery module; 30. Power supply control module; 11. Low-voltage battery; 12. Selection device; 21. First battery block; 22. Second battery block; 31. Voltage acquisition unit; 32. Voltage comparator operational amplifier; 3A. First voltage acquisition unit; 3B. Second voltage acquisition unit; 3C. Voltage amplifier; 41. First current acquisition unit; 42. Second current acquisition unit; 43. Power supply controller; 210. First load; 220. Second load; 50. High-voltage battery module. Detailed Implementation

[0041] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0042] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0043] In a vehicle's power supply control system, there are typically two systems: a high-voltage system and a low-voltage system. During startup or charging, the low-voltage battery draws power from the high-voltage battery via a DC / DC converter. However, due to the presence of numerous electronic control units in the vehicle, the static current increases significantly. Furthermore, the complex wake-up mechanism causes the vehicle network to continuously consume battery power, leading to an overload on the low-voltage battery. When the battery voltage falls below the normal operating range, the vehicle cannot start, severely impacting the user experience.

[0044] Therefore, based on the shortcomings of the above power supply control circuit, the power supply control circuit of this application is proposed. The main solution of the embodiment of this application is: to supply power to the external load through the output terminal of the low-voltage battery module, and at the same time, the output terminal of the power replenishment control module is connected to the control terminal of the low-voltage battery module. Then, when it is determined that the low-voltage battery module is in a state of low voltage, the low-voltage battery module is controlled to replenish the low-voltage battery module, thereby avoiding the phenomenon of low voltage caused by continuous power supply from the low-voltage battery. That is, the power supply and power replenishment control are performed through the low-voltage battery module to improve the power supply control effect.

[0045] Based on this, the embodiments of this application provide a power supply control circuit, referring to... Figure 1 , Figure 1 This is a schematic diagram of the first embodiment of the power supply control circuit of this application.

[0046] Reference Figure 1 This application provides a power supply control circuit, which includes:

[0047] Low-voltage battery module 10;

[0048] The low-voltage battery module 20 has its input terminal connected to the output terminal of the low-voltage battery module 10, and its output terminal connected to the external load 200.

[0049] The power replenishment control module 30 has its input terminal connected to the input terminal of the low-voltage battery module 20 and its output terminal connected to the control terminal of the low-voltage battery module 10. The power replenishment control module 30 is used to control the low-voltage battery module 10 to replenish the low-voltage battery module 20 when the low-voltage battery module 20 is in a depleted state.

[0050] In this embodiment, the power supply control circuit includes a low-voltage battery module 10, a low-voltage battery module 20, and a power replenishment control module 30. The input terminal of the low-voltage battery module 20 is connected to the output terminal of the low-voltage battery module 10, and the output terminal of the low-voltage battery module 20 is connected to an external load 200 to enable the low-voltage battery module 20 to supply power to the external load 200. The external load 200 can be a low-voltage or high-voltage load, and the power supply to the low-voltage or high-voltage load can be achieved through different connection relationships with the low-voltage battery module 20. Simultaneously, the power replenishment control module 30 monitors the status of the low-voltage battery module 20. When the low-voltage battery module 20 is in a depleted state, the low-voltage battery module 10 controls the low-voltage battery module 10 to replenish the low-voltage battery module 20, ensuring that the low-voltage battery module 20 avoids a depleted state and thus improving the power supply control effect. Here, a depleted state refers to the state in which the low-voltage battery module 20 is detected to be below a defined voltage value. In this state, it is determined that the low-voltage battery module 20 is depleted, and then the power replenishment is controlled to prevent the low-voltage battery module 20 from supplying power when it is depleted, thereby improving the power supply control effect and enhancing the reliability and stability of the automotive power system, providing users with a more convenient and higher-quality travel experience.

[0051] In this embodiment, a power supply control circuit is provided, including a low-voltage battery module 10; a low-voltage battery module 20, the input terminal of which is connected to the output terminal of the low-voltage battery module 10, and the output terminal of the low-voltage battery module 20 is connected to an external load 200; and a power replenishment control module 30, the input terminal of which is connected to the input terminal of the low-voltage battery module 20, and the output terminal of which is connected to the control terminal of the low-voltage battery module 10. The power replenishment control module 30 is used to control the low-voltage battery module 10 when the low-voltage battery module 20 is in a depleted state. The low-voltage battery module 20 is recharged. This power supply control circuit connects the output terminal of the low-voltage battery module 20 to the external load 200, thereby supplying power to the external load 200. At the same time, the output terminal of the power replenishment control module 30 is connected to the control terminal of the low-voltage battery module 10. When it is determined that the low-voltage battery module 20 is in a state of low power, the low-voltage battery module 10 is controlled to replenish the low-voltage battery module 20, thereby avoiding the phenomenon of low power loss caused by continuous power supply from the low-voltage battery. That is, the power supply and power replenishment control are performed by the low-voltage battery module 10 to improve the power supply control effect.

[0052] Furthermore, based on the first embodiment of this application described above, a second embodiment of the power supply control circuit of this application is proposed, referring to... Figure 2 , Figure 2 This is a connection diagram of the first embodiment of the power supply control circuit of this application. The low-voltage battery module 10 includes:

[0053] Low-voltage battery 11, the positive terminal of low-voltage battery 11 is connected to the input terminal of low-voltage battery module 20, and the negative terminal of low-voltage battery 11 is connected to the input terminal of low-voltage battery module 20.

[0054] Selector 12 has its first input terminal connected to the positive terminal of low-voltage battery 11, its second input terminal connected to the negative terminal of low-voltage battery 11, its output terminal connected to the input terminal of low-voltage battery module 20, and its control terminal connected to the output terminal of power replenishment control module 30.

[0055] In one embodiment, the low-voltage battery module 20 includes:

[0056] The first battery block 21 has its positive terminal connected to the positive terminal of the low-voltage battery 11 and the external load 200, and its negative terminal connected to the output terminal of the selection device 12 and the external load 200.

[0057] The positive terminal of the second battery block 22 is connected to the negative terminal of the first battery block 21, and the negative terminal of the second battery block 22 is connected to the negative terminal of the low-voltage battery 11 and the external load 200.

[0058] In this embodiment, the low-voltage battery module 10 includes a low-voltage battery 11 and a selection device 12. The low-voltage battery 11 is used to replenish the low-voltage battery module 20 when it is depleted, thereby ensuring the power supply effect of the low-voltage battery module 20. The low-voltage battery module 20 includes a first battery block 21 and a second battery block 22 (more battery blocks can be set to achieve more selectivity of power supply voltage, but subsequent comparison and replenishment will be more complex). Therefore, based on whether the first battery block 21 or the second battery block 22 is depleted, the low-voltage battery 11 can be controlled to selectively charge which battery block. Taking low-voltage battery 11 as a 12V battery, and first battery block 21 and second battery block 22 as 12V battery blocks respectively, the positive terminal of low-voltage battery 11 is connected to the positive terminal of first battery block 21 or the positive terminal of second battery block 22, and the negative terminal of low-voltage battery 11 is connected to the negative terminal of second battery block 22 or the negative terminal of first battery block 21. The ends of first battery block 21 and second battery block 22 connected to the positive or negative terminal of low-voltage battery 11 are joined together. Taking the connection of the negative terminal of first battery block 21 to the positive terminal of second battery block 22 as an example, the positive terminal of second battery block 22 will also be connected to the output terminal of selection device 12. The control principle of selection device 12 is as follows: when the control terminal of selection device 11 receives a high level, the first input terminal of selection device 12 and the output terminal of selection device 12 are connected, i.e., the output terminal of selection device 12 is negative. Since both ends of the second battery block 22 are negative, there is no circuit. Only the first battery block 21 is charged with one positive and one negative charge, meaning the first battery block 21 is in a depleted state at this time, and thus the first battery block 21 is recharged. When the control terminal of the selection device 11 receives a low level, the second input terminal and the output terminal of the selection device 12 are both positive, meaning the output terminal of the selection device 12 is positive. Thus, both ends of the first battery block 21 are negative, and there is no circuit. Only the second battery block 22 is charged with one positive and one negative charge, meaning the second battery block 22 is in a depleted state at this time, and thus the second battery block 22 is recharged. This process of charging the first battery block 21 or the second battery block 22 at different times ensures the state of the first battery block 21 and the second battery block 22, thereby improving the power supply effect of the first battery block 21 and the second battery block 22 to the external load 200.

[0059] In one embodiment, based on the first and / or second embodiments of this application described above, a third embodiment of the power supply control circuit of this application is proposed. When the external load 200 is a first load 210 that requires the power supply voltage of a single battery block, the positive terminal of the first load 210 is connected to the positive terminal of the first battery block 21, and the negative terminal of the first load 210 is connected to the negative terminal of the first battery block 21.

[0060] Alternatively, the positive terminal of the first load 210 can be connected to the positive terminal of the second battery block 22, and the negative terminal of the first load 210 can be connected to the negative terminal of the second battery block 22.

[0061] In one embodiment, when the external load 200 is a second load 220 that requires the power supply voltage of the dual battery pack, the positive terminal of the second load 220 is connected to the positive terminal of the first battery pack 21, and the negative terminal of the second load 220 is connected to the negative terminal of the second battery pack 22.

[0062] In this embodiment, the external load 200 is the first load 210 that requires the power supply voltage of a single battery pack, i.e., the 12V load exemplified in the above embodiment. At this time, the positive terminal of the first load 210 is connected to the positive terminal of the first battery pack 21, and the negative terminal of the first load 210 is connected to the negative terminal of the first battery pack 21; or the positive terminal of the first load 210 is connected to the positive terminal of the second battery pack 22, and the negative terminal of the first load 210 is connected to the negative terminal of the second battery pack 22. That is, for the 12V load, it is possible to select the connection to the positive and negative terminals of the first battery pack 21 or the positive and negative terminals of the second battery pack 22 for power supply. The external load 200 is a second load 220 that requires the power supply voltage of the dual battery packs, i.e., the 24V load in the example above. At this time, the positive terminal of the second load 220 is connected to the positive terminal of the first battery pack 21, and the negative terminal of the second load 220 is connected to the negative terminal of the second battery pack 22. That is, for the 24V load, it is possible to connect to the positive terminal of the first battery pack 21 and the negative terminal of the second battery pack 22 for power supply. In this way, the effect of 12V and 24V can be achieved based on the two battery packs, and the phenomenon of battery pack depletion can be avoided, thereby ensuring the power supply effect of the entire power supply control circuit.

[0063] Based on the first, second, and / or third embodiments of this application described above, a fourth embodiment of the power supply control circuit of this application is proposed, with reference to... Figure 3 , Figure 3 This is a connection diagram of a second embodiment of the power supply control circuit of this application. The power supply control module 30 includes:

[0064] Voltage acquisition unit 31, the input terminal of voltage acquisition unit 31 is connected to the output terminal of low voltage battery module 20;

[0065] The voltage comparator operational amplifier 32 has its input terminal connected to the output terminal of the voltage acquisition unit 31, and its output terminal connected to the control terminal of the selector 12 in the low-voltage battery module 10.

[0066] Furthermore, the voltage comparison operational amplifier 32 includes a first operational amplifier input terminal and a second operational amplifier input terminal, and the voltage acquisition unit 31 includes:

[0067] The first voltage acquisition device 3A has its negative terminal grounded, its positive terminal connected to the positive terminal of the first battery block 21 in the low-voltage battery module 20, and its output terminal connected to the input terminal of the first operational amplifier.

[0068] The negative terminal of the second voltage acquisition device 3B is grounded, and the positive terminal of the second voltage acquisition device 3B is connected to the positive terminal of the second battery block 22 in the low-voltage battery module 20.

[0069] Voltage amplifier 3C has its input terminal connected to the output terminal of the second voltage acquisition unit 3B, and its output terminal connected to the input terminal of the first operational amplifier.

[0070] In this embodiment, the battery depletion status can be monitored and controlled using a charging control module 30. The charging control module 30 includes a voltage acquisition unit 31 and a voltage comparison operational amplifier 32. The voltage acquisition unit 31 includes a first voltage acquisition device 3A, a second voltage acquisition device 3B, and a voltage amplifier 3C. The first voltage acquisition device 3A and the second voltage acquisition device 3B can acquire the voltage of the first battery cell 21 and the second battery cell 22. Common voltage acquisition devices or other acquisition circuits can be used, such as common voltage acquisition circuits. It is worth noting that it is only necessary to ensure that the acquisition principles of the two voltage acquisition devices are consistent, such as using the same proportional acquisition device (e.g., a 0.5x acquisition device). By comparing the voltage values ​​acquired by the two voltage acquisition devices, it can be determined which battery cell is in a depleted state, and then the depleted battery cell can be charged accordingly. Taking the 12V battery block of the above embodiment as an example, if the first voltage collector 3A collects a voltage value of 2.9V (assuming the first voltage collector 3A is 1 / 8 of the actual voltage, then the actual voltage value should be 23.2V, that is, the sum of the voltages of the two battery blocks), and the second voltage collector 3B collects a voltage value of 1.4V (assuming the second voltage collector 3B is 1 / 8 of the actual voltage, then the actual voltage value should be 11.2V, that is, the voltage of the second battery block 22), then the 11.2V is amplified by the voltage amplifier 3C. If the voltage amplifier 3C is amplified by 2 times (corresponding to the two battery blocks in the design), then the output voltage of the voltage amplifier 3C is 22.4V. Then, after comparison by the voltage comparison operational amplifier 32 (such as a commonly used operational amplifier, which compares two inputs and controls the output to be 0 or 1 when the two inputs have different magnitudes), it is found that the first operational amplifier... The voltage comparison operation amp 32 outputs a low level, and selects the second input terminal of device 12 and the output terminal of device 12. At this time, the output terminal of device 12 is positive, and both ends of the first battery block 21 are negative, so there is no circuit. Only the second battery block 22 is charged with one positive and one negative connection. Conversely, the first voltage acquisition device 3A acquires a voltage value of 2.9V, but the second voltage acquisition device 3B acquires a voltage value of 1.5V. Even if the voltage amplifier 3C outputs a voltage of 24V, the voltage comparison operation amp 32 outputs a high level, and the output terminal of device 12 is negative. Both ends of the second battery block 22 are negative, so there is no circuit. Only the first battery block 21 is charged with one positive and one negative connection. That is, at this time, the first battery block 21 is in a depleted state, and then the first battery block 21 is recharged. This allows for selective power supply to the first battery block 21 or the second battery block 22, ensuring that the first battery block 21 and the second battery block 22 are not powered while in a depleted state, thereby improving the power supply efficiency of the power supply control circuit.

[0071] In one embodiment, the power supply control module 30 can also use other voltage comparison methods, such as directly using a voltmeter, to determine which battery block is low on power, so as to supply power to the low-power battery block in a targeted manner. At the same time, both the first battery block 21 and the second battery block 22 can be set with charging protection function, that is, when the voltage is equal to 12V, they will not receive external power to avoid overcharging and thus ensure the charging safety of the battery.

[0072] Based on the first, second, third, and / or fourth embodiments of this application described above, a fifth embodiment of the power supply control circuit of this application is proposed, with reference to... Figure 4 , Figure 4 This is a connection diagram of a third embodiment of the power supply control circuit of this application. The power supply control circuit includes:

[0073] The first current collector 41 is disposed between the positive terminal of the first battery block 21 in the low-voltage battery module 20 and the external load 200.

[0074] The second current collector 42 is disposed between the positive terminal of the second battery block 22 in the low-voltage battery module 20 and the external load 200.

[0075] The power supply controller 43 has its input terminal connected to the output terminal of the first current collector 41 and the output terminal of the second current collector 42, and its output terminal connected to the control terminal of the selected device 12 in the power supply control module 10.

[0076] In this embodiment, the power supply control circuit may further include a component for determining the battery usage status. Specifically, a first current collector 41 and a second current collector 42 are respectively positioned between the positive terminal of the first battery block 21 in the low-voltage battery module 20 and the external load 200, and between the positive terminal of the second battery block 22 in the low-voltage battery module 20 and the external load 200, to determine whether the first battery block 21 and the second battery block 22 are being used. If there is current in the second current collector 42 (i.e., the external load 200 connected to the second current collector 42 needs to be powered, meaning the external load 200 is connected to and conducting the second battery block 22), the current collected by the second current collector 42 can be transmitted to the power replenishment control circuit. Device 43 informs the power supply controller 43 that the second battery block 22 is supplying power. At this time, the first current acquisition device 41 will not output current because the external load 200 connected to it does not need to be powered (at this time, the output of the power supply controller 43 can be used as the first priority and the output of the voltage comparison operational amplifier 32 as the second priority for control. Of course, it is also possible to only consider the output of the voltage comparison operational amplifier 32 for control, which is not limited here). If it is necessary to supply power to the first battery block 21 at the same time, it will supply power to the first battery block 21 when it is not supplied with power, so as to ensure the safety of supplying power to the first battery block 21 and facilitate the effect of supplying power to the first battery block 21 in the future.

[0077] In one embodiment, reference may be made to Figure 5 , Figure 5 This is a connection diagram of the fourth embodiment of the power supply control circuit of this application. The entire power supply control circuit may further include a high-voltage battery module 50. The high-voltage battery module converts 450V to 24V to supply power to the low-voltage battery module 10. At the same time, the low-voltage battery module 10 can replenish power to the low-voltage battery module 20 and can also directly supply power to the first load 210 to ensure the functionality and power supply selectivity of the entire power supply control circuit. Of course, to ensure the power supply effect, the frequently used first load 210 can be connected to the low-voltage battery module 20, and other first loads 210 that are used less often or for shorter periods of time can be connected to the low-voltage battery module 10 to ensure the stability of the power supply.

[0078] Based on the above embodiments of the power supply control circuit, a power supply control device is proposed, which includes the above power supply control circuit.

[0079] In this embodiment, the power supply control device includes a power supply control circuit, a low-voltage battery module, an input terminal of which is connected to an output terminal of which is connected to an external load, and a power replenishment control module, the input terminal of which is connected to the input terminal of the low-voltage battery module, and the output terminal of which is connected to the control terminal of the low-voltage battery module. The power replenishment control module is used to control the low-voltage battery module to replenish power when the low-voltage battery module is in a depleted state. This power supply control circuit connects the output terminal of the low-voltage battery module to the external load to supply power, and simultaneously connects the output terminal of the power replenishment control module to the control terminal of the low-voltage battery module. Therefore, when it is determined that the low-voltage battery module is in a depleted state, the circuit controls the low-voltage battery module to replenish power, thereby avoiding the phenomenon of continuous power supply from the low-voltage battery causing depletion. In other words, by using the low-voltage battery module for power supply and power replenishment control, the power supply control effect is improved.

[0080] Based on the above embodiments of the power supply control circuit, a vehicle is proposed, which includes the aforementioned power supply control device.

[0081] In this embodiment, the vehicle uses a power supply control device to connect the output of the low-voltage battery module to an external load, thereby supplying power to the external load. Simultaneously, the output of the power replenishment control module is connected to the control terminal of the low-voltage battery module. When it is determined that the low-voltage battery module is in a depleted state, the device controls the low-voltage battery module to replenish the power, thus avoiding the phenomenon of depletion caused by continuous power supply from the low-voltage battery. In other words, by using the low-voltage battery module for power supply and power replenishment control, the effectiveness of power supply control is improved.

[0082] The above are only some embodiments of this application and do not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A power supply control circuit, characterized by comprising: The power supply control circuit includes: Low-voltage battery module; A low-voltage battery module, wherein the input terminal of the low-voltage battery module is connected to the output terminal of the low-voltage storage battery module, and the output terminal of the low-voltage battery module is connected to an external load; A power replenishment control module is provided, wherein the input terminal of the power replenishment control module is connected to the input terminal of the low-voltage battery module, and the output terminal of the power replenishment control module is connected to the control terminal of the low-voltage battery module. The power replenishment control module is used to control the low-voltage battery module to replenish the low-voltage battery module when the low-voltage battery module is in a depleted state.

2. The power supply control circuit of claim 1, wherein, The low-voltage battery module includes: A low-voltage battery, wherein the positive terminal of the low-voltage battery is connected to the input terminal of the low-voltage battery module, and the negative terminal of the low-voltage battery is connected to the input terminal of the low-voltage battery module; The selection device has a first input terminal connected to the positive terminal of the low-voltage battery, a second input terminal connected to the negative terminal of the low-voltage battery, an output terminal connected to the input terminal of the low-voltage battery module, and a control terminal connected to the output terminal of the power replenishment control module.

3. The power supply control circuit as described in claim 2, characterized in that, The low-voltage battery module includes: The first battery block has its positive terminal connected to the positive terminal of the low-voltage battery and the external load, and its negative terminal connected to the output terminal of the selection device and the external load. The second battery block has its positive terminal connected to the negative terminal of the first battery block, and its negative terminal connected to the negative terminal of the low-voltage battery and the external load.

4. The power supply control circuit of claim 3, wherein, When the external load is a first load that requires the power supply voltage of a single battery pack, the positive terminal of the first load is connected to the positive terminal of the first battery pack, and the negative terminal of the first load is connected to the negative terminal of the first battery pack. Alternatively, the positive terminal of the first load can be connected to the positive terminal of the second battery block, and the negative terminal of the first load can be connected to the negative terminal of the second battery block.

5. The power supply control circuit as described in claim 3, characterized in that, When the external load is a second load that requires the power supply voltage of the dual battery pack, the positive terminal of the second load is connected to the positive terminal of the first battery pack, and the negative terminal of the second load is connected to the negative terminal of the second battery pack.

6. The power supply control circuit as described in claim 1, characterized in that, The power supply control module includes: A voltage acquisition unit, wherein the input terminal of the voltage acquisition unit is connected to the output terminal of the low-voltage battery module; A voltage comparator operational amplifier is provided, the input of which is connected to the output of the voltage acquisition unit, and the output of which is connected to the control terminal of the selected device in the low-voltage battery module.

7. The power supply control circuit as described in claim 6, characterized in that, The voltage comparison operational amplifier includes a first operational amplifier input terminal and a second operational amplifier input terminal, and the voltage acquisition unit includes: The first voltage acquisition device has its negative terminal grounded, its positive terminal connected to the positive terminal of the first battery block in the low-voltage battery module, and its output terminal connected to the input terminal of the first operational amplifier. The second voltage acquisition device has its negative terminal grounded and its positive terminal connected to the positive terminal of the second battery block in the low-voltage battery module. A voltage amplifier, wherein the input terminal of the voltage amplifier is connected to the output terminal of the second voltage acquisition unit, and the output terminal of the voltage amplifier is connected to the input terminal of the first operational amplifier.

8. The power supply control circuit as described in any one of claims 1 to 7, characterized in that, The power supply control circuit includes: A first current collector is disposed between the positive terminal of the first battery cell in the low-voltage battery module and the external load. The second current collector is disposed between the positive terminal of the second battery block in the low-voltage battery module and the external load. A power supply controller, wherein the input terminal of the power supply controller is connected to the output terminal of the first current collector and the output terminal of the second current collector, and the output terminal of the power supply controller is connected to the control terminal of the device selected in the power supply control module.

9. A power supply control device, characterized in that, The power supply control device includes the power supply control circuit according to any one of claims 1 to 8.

10. A vehicle, characterized in that, The vehicle includes the power supply control device as described in claim 9.

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