Power supply circuit of power management module and automobile
By setting the first DCDC module and the power battery module in the power supply circuit of the power management module and controlling the first switch to be disconnected, a minimum power supply system is formed, and the problem of low power supply reliability of the power management module is solved, and stable and reliable power supply is achieved.
Patent Information
- Application Number
- CN202422308759.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, the power supply reliability of the power management module is not high, and is susceptible to interference from other controllers or abnormal disconnection, resulting in unstable power supply.
A power supply circuit for a power management module is designed, including a first DCDC module, a power battery module, a storage battery, a first switch and a power management module. By setting the first DCDC module inside the battery pack and after powering on the power battery module, the first switch is controlled to be turned off, so that the first DCDC module can provide the power supply voltage separately to the power management module to form a minimum power supply system to avoid other load interference.
It improves the power supply reliability of the power management module, prevents other loads from interfering with the power supply terminal, and ensures stable power supply of the power management module.
Smart Images
Figure CN222946557U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electric power technology, and in particular to a power supply circuit of a power management module and a car. Background Art
[0002] At present, vehicles often use DCDC single-channel output and battery in parallel to power all vehicle controllers, or use DCDC dual-channel non-isolated output and battery in parallel to power all vehicle controllers. In the above technical solution, all controllers include a power management module, and the power management module and other controllers are powered together. The power supply is from the same source. Since other controllers may cause interference or abnormal disconnection when working, this will affect the power supply end of the power supply, thereby affecting the power supply of the power management module and causing instability.
[0003] It can be seen that the prior art has the problem that the power supply reliability of the power management module is not high. Summary of the invention
[0004] In view of the above problems, the present application provides a power supply circuit of a power management module and a car, which are used to solve the problem of low power supply reliability of the power management module existing in the prior art.
[0005] According to a first aspect of an embodiment of the present application, a power supply circuit of a power management module is provided, characterized in that the power supply circuit comprises: a first DCDC module, a power battery module, a storage battery, a first switch and a power management module; the first DCDC module, the power battery module, the first switch and the power management module are arranged inside a battery pack; the first switch is in a normally closed state; the first DCDC module is respectively connected to the output end of the power battery module and the first end of the first switch, and is used to convert the first power supply voltage output by the power battery module into a second power supply voltage; the storage battery is connected to the second end of the first switch, and is used to output the second power supply voltage; the first end of the power management module is respectively connected to the first end of the first switch, and is used to receive the second power supply voltage output by the storage battery, and is also used to control the first switch to be disconnected after the power battery module is powered on, so that the first DCDC module provides the second power supply voltage to the power management module.
[0006] In an exemplary embodiment of the present application, the power supply circuit also includes: a second DCDC module; the second DCDC module is respectively connected to the output end of the power battery module and the second end of the first switch, and is used to convert the first supply voltage output by the power battery module into a second supply voltage, and is also used to provide the second supply voltage to the power management module when the first switch is closed.
[0007] In an exemplary embodiment of the present application, the power supply circuit also includes: a second switch; the two ends of the second switch are respectively connected to the two DCDC modules and the battery; the second DCDC module is also used to control the second switch to disconnect when it detects that the voltage at both ends of the second switch is outside a preset voltage threshold range.
[0008] In an exemplary embodiment of the present application, the second end of the power management module is also connected to the second end of the first switch, and is used to detect whether the second end of the first switch receives a second power supply voltage, and is also used to control the first switch to close and control the power battery module to power off if it is detected that the second power supply voltage is received.
[0009] In an exemplary embodiment of the present application, the power management module is further configured to maintain the first switch disconnected and control the power battery module to power off if it is detected that the second power supply voltage is not received.
[0010] In an exemplary embodiment of the present application, the second DCDC module is further connected to the first type of load and the second type of load, respectively, for providing a second supply voltage to the first type of load and the second type of load, respectively.
[0011] In an exemplary embodiment of the present application, the storage battery is also connected to the second end of the second type of load and the third type of load, respectively, for providing a second supply voltage to the second type of load and the third type of load, respectively.
[0012] In an exemplary embodiment of the present application, the power battery module includes: a power battery and a pre-charging unit; the output end of the power battery is respectively connected to the input end of the pre-charging unit; the output end of the pre-charging unit is respectively connected to the input end of the first DCDC module and the input end of the second DCDC module.
[0013] In an exemplary embodiment of the present application, the pre-charging unit includes: a third switch, a fourth switch, a pre-charging resistor and a fifth switch; the first end of the third switch is connected to the first output end of the power battery, and the second end of the third switch is respectively connected to the first input end of the first DCDC module and the first input end of the second DCDC module; the first end of the fourth switch is connected to the first output end of the power battery, and the second end of the fourth switch is connected to the first end of the pre-charging resistor; the second end of the pre-charging resistor is respectively connected to the first input end of the first DCDC module and the first input end of the second DCDC module; the first end of the fifth switch is connected to the second output end of the power battery, and the second end of the fifth switch is respectively connected to the second input end of the first DCDC module and the second input end of the second DCDC module.
[0014] According to a second aspect of an embodiment of the present application, a car is provided, comprising a power supply circuit of the power management module.
[0015] The application has at least the following beneficial technical effects:
[0016] The first DCDC module is arranged inside the battery pack. When the power battery module is powered on, the first DCDC module converts the first power supply voltage output by the power battery module into the second power supply voltage so as to provide the second power supply voltage to the power management module. When the first switch is closed, the storage battery provides the second power supply voltage to the power management module. The storage battery is also connected to other loads. If other loads fail, it is easy to interfere with the power supply end of the power management module. When the power battery module is powered on, the first switch is controlled to be disconnected so that the storage battery stops providing the second power supply voltage to the power management module, and the first DCDC module provides the second power supply voltage to the power management module alone. The power battery module, the first DCDC module and the power management module form a minimum power supply system to prevent other loads from interfering with the power supply of the power management module, thereby providing power supply reliability of the power management module.
[0017] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:
[0019] Figure 1 A structural diagram of a first embodiment of a power supply circuit of a power management module provided by the present application is shown;
[0020] Figure 2 A structural diagram of a second embodiment of a power supply circuit of a power management module provided by the present application is shown;
[0021] Figure 3 A structural diagram of a third embodiment of a power supply circuit of a power management module provided by the present application is shown;
[0022] Figure 4 A structural diagram of a fourth embodiment of a power supply circuit of a power management module provided by the present application is shown. DETAILED DESCRIPTION
[0023] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.
[0024] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.
[0025] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.
[0026] The term "multiple" as used in this application refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.
[0027] Figure 1 A structural diagram of a first embodiment of a power supply circuit of a power management module provided by the present application is shown. Figure 1 As shown, the power supply circuit includes: a first DCDC module 110, a power battery module 120, a storage battery 200, a first switch 300 and a power management module 130; the first DCDC module 110, the power battery module 120, the first switch 300 and the power management module 130 are arranged inside the battery pack 100; the first switch 300 is in a normally closed state;
[0028] The first DCDC module 110 is connected to the output end of the power battery module 120 and the first end of the first switch 300 respectively, and is used to convert the first power supply voltage output by the power battery module 120 into a second power supply voltage;
[0029] The battery 200 is connected to the second end of the first switch 300 and is used to output a second supply voltage;
[0030] The first end of the power management module 130 is respectively connected to the first end of the first switch 300, and is used to receive the second supply voltage output by the battery 200, and is also used to control the first switch 300 to be disconnected after the power battery module 120 is powered on, so that the first DCDC module 110 provides the second supply voltage to the power management module 130.
[0031] In this embodiment, the power management module 130 is an important control device of the power battery pack 100. The first DCDC module 110 is arranged inside the battery pack. When the power battery module 120 is powered on, the first DCDC module 110 converts the first power supply voltage output by the power battery module 120 into a second power supply voltage, so as to provide the second power supply voltage to the power management module 130. When the first switch 300 is closed, the battery 200 provides the second power supply voltage to the power management module 130. The battery 200 is also connected to other loads. If other loads fail, When the power supply end of the power management module 130 is easily interfered, when the power battery module 120 is powered on, the first switch 300 is controlled to be disconnected, so that the battery 200 stops providing the second power supply voltage to the power management module 130, and the first DCDC module 110 provides the second power supply voltage to the power management module 130 alone. The power battery module 120, the first DCDC module 110 and the power management module 130 form a minimum power supply system to prevent other loads from interfering with the power supply of the power management module 130, thereby providing power supply reliability for the power management module 130.
[0032] Figure 2 A structural diagram of a second embodiment of a power supply circuit of a power management module provided by the present application is shown. Figure 2 As shown, the power supply circuit further includes: a second DCDC module 400;
[0033] The second DCDC module 400 is respectively connected to the output end of the power battery module 120 and the second end of the first switch 300, and is used to convert the first supply voltage output by the power battery module 120 into a second supply voltage, and is also used to provide the second supply voltage to the power management module 130 when the first switch 300 is closed.
[0034] In this embodiment, when the first switch 300 is closed, the first supply voltage can be converted into a second supply voltage through the second DCDC module 400 to provide the second supply voltage for the power management module 130; the second DCDC module 400 is also connected to other loads. If other loads fail, it is easy to interfere with the power supply end of the power management module 130. When the power battery module 120 is powered on, the first switch 300 is controlled to be disconnected, so that the second DCDC module 400 only supplies power to other loads, preventing other loads from interfering with the power supply of the power management module 130, thereby providing power supply reliability for the power management module 130.
[0035] See also Figure 2 As shown, the power supply circuit also includes: a second switch 500; the two ends of the second switch 500 are respectively connected to the two DCDC modules and the battery 200; the second DCDC module 400 is also used to control the second switch 500 to disconnect when it is detected that the voltage at both ends of the second switch 500 is outside the preset voltage threshold range.
[0036] In this embodiment, when the second switch 500 is closed, the second DCDC module 400 monitors the voltage across the second switch 500 in real time. If the voltage across the second switch 500 is outside the preset voltage threshold range, it means that a fault has occurred in the power supply circuit of the battery 200 or the power supply circuit of the second DCDC module 400, and the second switch 500 is controlled to be disconnected to prevent the faulty side from affecting the other side.
[0037] See also Figure 2 As shown, the second end of the power management module 130 is also connected to the second end of the first switch 300, and is used to detect whether the second end of the first switch 300 receives the second power supply voltage, and is also used to control the first switch 300 to close and control the power battery module 120 to power off after detecting that the second power supply voltage is received.
[0038] In this embodiment, the power management module 130 collects whether the second section of the first switch 300 receives the second power supply voltage. If the second power supply voltage is received, it means that the second power supply voltage output by the second DCDC module 400 or the battery 200 is normal. After the power battery module 120 is powered off, that is, the first DCDC module 110 stops outputting the second power supply voltage, the first switch 300 is controlled to be closed, so that the battery 200 provides the second power supply voltage to the power management module 130.
[0039] In another embodiment of the present application, the power management module 130 is further configured to maintain the first switch 300 disconnected and control the power battery module 120 to power off if it is detected that the second power supply voltage is not received.
[0040] In this embodiment, if it is detected that the second power supply voltage is not received, it means that the second power supply voltage output by the second DCDC module 400 or the battery 200 is abnormal, then the first switch 300 is maintained in an off state, and the power battery module 120 is directly controlled to be powered off, so as to prevent the fault generated by the second DCDC module 400 or the battery 200 from interfering with the power management module 130.
[0041] Figure 3 A structural diagram of a third embodiment of a power supply circuit of a power management module provided by the present application is shown. Figure 3 As shown, the second DCDC module 400 is also connected to the first type of load 610 and the second type of load 620 respectively, for providing a second supply voltage to the first type of load 610 and the second type of load 620 respectively.
[0042] The storage battery 200 is also connected to the second end of the second type load 620 and the third type load 630 respectively, so as to provide a second supply voltage to the second type load 620 and the third type load 630 respectively.
[0043] In this embodiment, the second DCDC module 400 is also connected to the first type of load 610, and is used to provide a second power supply voltage to the first type of load 610. The second DCDC module 400 is also connected to the second type of load 620, and is used to provide a second power supply voltage to the second type of load 620, and together with the battery 200, forms a dual power supply for the second type of load 620. When the battery 200 fails, the second DCDC module 400 can provide a second power supply voltage to the second type of load 620.
[0044] The battery 200 is also connected to the third type load 630 for providing a second power supply voltage to the third type load 630. The battery 200 is also connected to the second type load 620 for providing a second power supply voltage to the second type load 620, and together with the second DCDC module 400, forms a dual power supply for the second type load 620. When the second DCDC module 400 fails, the second power supply voltage can be provided to the second type load 620 through the battery 200.
[0045] The power battery module 120 includes: a power battery 121 and a pre-charging unit; the output end of the power battery 121 is respectively connected to the input end of the pre-charging unit; the output end of the pre-charging unit is respectively connected to the input end of the first DCDC module 110 and the input end of the second DCDC module 400.
[0046] In this embodiment, a pre-charging unit is provided to prevent excessive current generated after the power battery is powered on, thereby preventing a strong impact on the switch and the power battery.
[0047] Figure 4 A structural diagram of a fourth embodiment of a power supply circuit of a power management module provided by the present application is shown. Figure 4 As shown, the pre-charging unit includes: a third switch 122, a fourth switch 123, a pre-charging resistor 124 and a fifth switch 125;
[0048] The first end of the third switch 122 is connected to the first output end of the power battery 121, and the second end of the third switch 122 is connected to the first input end of the first DCDC module 110 and the first input end of the second DCDC module 400 respectively;
[0049] A first end of the fourth switch 123 is connected to a first output end of the power battery 121 , and a second end of the fourth switch 123 is connected to a first end of the pre-charging resistor 124 ;
[0050] The second end of the pre-charging resistor 124 is connected to the first input end of the first DCDC module 110 and the first input end of the second DCDC module 400 respectively;
[0051] A first end of the fifth switch 125 is connected to the second output end of the power battery 121 , and a second end of the fifth switch 125 is connected to the second input end of the first DCDC module 110 and the second input end of the second DCDC module 400 .
[0052] In this embodiment, when power is turned on, the fourth switch 123 and the fifth switch 125 are first controlled to be closed, so that the loop including the pre-charging resistor 124 is turned on, and the pre-charging resistor 124 limits the current generated by the power battery 121 to prevent a large current from being generated at the moment the switch is closed, which may cause a strong impact on the switch and the power battery 121 and cause damage. Then, the third switch 122 is controlled to be closed, and then the fourth switch 123 is controlled to be disconnected, so that the power battery provides the first supply voltage to the first DCDC module 110 and the second DCDC module 400.
[0053] In another embodiment of the present application, an automobile is provided, including a power supply circuit of the power management module.
[0054] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made according to the claims and description of the present application should fall within the scope of the patent of this application.
[0055] The above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.
Claims
1. A power supply circuit of a power management module, characterized in that: The power supply circuit includes: a first DCDC module, a power battery module, a storage battery, a first switch and a power management module; the first DCDC module, the power battery module, the first switch and the power management module are arranged inside the battery pack; the first switch is in a normally closed state; The first DCDC module is connected to the output end of the power battery module and the first end of the first switch respectively, and is used to convert the first power supply voltage output by the power battery module into a second power supply voltage; The storage battery is connected to the second end of the first switch and is used to output a second supply voltage; The first end of the power management module is respectively connected to the first end of the first switch, and is used to receive the second power supply voltage output by the battery, and is also used to control the first switch to be disconnected after the power battery module is powered on, so that the first DCDC module provides the second power supply voltage to the power management module.
2. The power supply circuit of a power management module according to claim 1, characterized in that: The power supply circuit further includes: a second DCDC module; The second DCDC module is respectively connected to the output end of the power battery module and the second end of the first switch, and is used to convert the first power supply voltage output by the power battery module into a second power supply voltage, and is also used to provide the second power supply voltage to the power management module when the first switch is closed.
3. The power supply circuit of a power management module according to claim 2, characterized in that: The power supply circuit further includes: a second switch; Two ends of the second switch are respectively connected to the two DCDC modules and the battery; The second DCDC module is further configured to control the second switch to be disconnected when it is detected that the voltage across the second switch is outside a preset voltage threshold range.
4. The power supply circuit of a power management module according to claim 2, characterized in that: The second end of the power management module is also connected to the second end of the first switch, and is used to detect whether the second end of the first switch receives the second power supply voltage. If it is detected that the second power supply voltage is received, the first switch is controlled to close and the power battery module is controlled to power off.
5. The power supply circuit of the power management module according to claim 4, characterized in that: The power management module is further configured to maintain the first switch open and control the power battery module to power off if it is detected that the second power supply voltage is not received.
6. The power supply circuit of a power management module according to claim 2, characterized in that: The second DCDC module is also connected to the first type of load and the second type of load, respectively, for providing a second supply voltage to the first type of load and the second type of load, respectively.
7. The power supply circuit of the power management module according to claim 6, characterized in that: The storage battery is also connected to the second end of the second type of load and the third type of load, respectively, for providing a second supply voltage to the second type of load and the third type of load, respectively.
8. The power supply circuit of a power management module according to claim 2, characterized in that: The power battery module comprises: a power battery and a pre-charging unit; The output ends of the power batteries are respectively connected to the input ends of the pre-charging units; The output end of the pre-charging unit is connected to the input end of the first DCDC module and the input end of the second DCDC module respectively.
9. The power supply circuit of the power management module according to claim 8, characterized in that: The pre-charging unit comprises: a third switch, a fourth switch, a pre-charging resistor and a fifth switch; The first end of the third switch is connected to the first output end of the power battery, and the second end of the third switch is connected to the first input end of the first DCDC module and the first input end of the second DCDC module respectively; A first end of the fourth switch is connected to the first output end of the power battery, and a second end of the fourth switch is connected to the first end of the pre-charging resistor; The second end of the pre-charging resistor is connected to the first input end of the first DCDC module and the first input end of the second DCDC module respectively; A first end of the fifth switch is connected to the second output end of the power battery, and a second end of the fifth switch is connected to the second input end of the first DCDC module and the second input end of the second DCDC module respectively.
10. An automobile, characterized in that: A power supply circuit comprising the power management module according to any one of claims 1 to 9.