Power battery pack, vehicle power supply system and vehicle

Abstract

This application relates to the field of new energy technology, and in particular to a power battery pack, a vehicle power system, and a vehicle. The power battery pack includes: a first power supply component for providing the vehicle with a high-voltage power supply with a voltage greater than a first preset voltage; a second power supply component for providing the vehicle with a low-voltage power supply with a voltage less than a second preset voltage, wherein the first preset voltage is greater than the second preset voltage; and a switching component for isolating the first power supply area where the first power supply component is located and the second power supply area where the second power supply component is located, converting the high-voltage power supply in the first power supply area to a low-voltage power supply, and controlling the output of the low-voltage power supply from the second power supply component according to the vehicle's low-voltage power demand. This solves the problems of high cost and limitations in the adaptability of DC-DC converters to different vehicle models and subsequent power outputs in related technologies for new energy vehicle battery supply systems.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a power battery pack, a vehicle power system, and a vehicle. Background Technology

[0002] With the development of the automotive industry, new energy vehicles have become the mainstream. New energy vehicles have been developing for many years, and the power supply systems of various automakers are basically the same. High-voltage power supply is provided by the power battery pack, while low-voltage power supply is provided by a DC-DC converter.

[0003] The selection of DC-DC converters has a significant impact on the overall vehicle design and cost. Currently, automakers in the industry select DC-DC converters based on theoretical design and experience. However, due to cost pressures, the power performance of the DC-DC converter may be reduced later, which could limit future model expansion. Summary of the Invention

[0004] This application provides a power battery pack, a vehicle power system, and a vehicle to address the problems of high cost and limited adaptability of DC-DC battery supply systems for new energy vehicles in related technologies.

[0005] A first aspect of this application provides a power battery pack, comprising: a first power supply component for providing a high-voltage power supply to a vehicle with a voltage greater than a first preset voltage; a second power supply component for providing a low-voltage power supply to the vehicle with a voltage less than a second preset voltage, wherein the first preset voltage is greater than the second preset voltage; and a switching component for isolating a first power supply area where the first power supply component is located and a second power supply area where the second power supply component is located, converting the high-voltage power supply in the first power supply area into a low-voltage power supply, and controlling the second power supply component to output low-voltage power supply according to the low-voltage power demand of the vehicle.

[0006] Based on the above-mentioned technical means, the embodiments of this application can convert high-voltage power to low-voltage power through a switching component, and can intelligently control the output of low-voltage power of the vehicle according to the low-voltage power demand of the vehicle, replacing the traditional lead-acid lithium battery as the low-voltage power supply and the low-voltage power converter DCDC, reducing the cost of the vehicle and achieving a certain degree of vehicle weight reduction.

[0007] Furthermore, the switching component includes: a voltage conversion circuit for converting the high-voltage power supply into a low-voltage power supply; and a control unit for controlling the second power supply component to output low-voltage power supply.

[0008] Based on the above technical means, the embodiments of this application can convert high-voltage power supply into low-voltage power supply through voltage conversion circuit, without the need to use low-voltage converter DCDC, thus avoiding the problems of difficulty in DCDC design and selection and subsequent power limitations.

[0009] Furthermore, the switching component also includes a first battery module. The control unit is used to control the series-parallel connection relationship of the first battery module. If it is detected that the actual low-voltage power demand of the vehicle is greater than the maximum output power of the second power supply component, the first battery module is controlled to be connected in series to the second power supply area to provide low-voltage power. When the actual low-voltage power demand is less than or equal to the maximum output power, the first battery module is controlled to be connected in parallel to the first power supply area to provide high-voltage power.

[0010] Based on the above technical means, the embodiments of this application can control the relationship of the first battery module through the control unit, intelligently determine the low-voltage power demand of the whole vehicle, change the series and parallel connection relationship of the battery module in the switching component, and realize the allocation of battery modules to different power supply areas to provide power.

[0011] Furthermore, the first power supply component includes: a second battery module for storing the high-voltage power; and a first power output port connected to the second battery module, which supplies power to the high-voltage electrical components of the vehicle via a high-voltage wiring harness.

[0012] Based on the above technical means, the embodiments of this application can provide power to high-voltage electrical components by setting a first power output port and connecting it to the vehicle's high-voltage network through a high-voltage wiring harness.

[0013] Furthermore, the first power supply component also includes a charging input port, which is connected to the vehicle's charging port via a high-voltage wiring harness to receive electrical energy from the charging port to charge the second battery module.

[0014] Based on the above technical means, the embodiments of this application, by setting a charging input port and using high-voltage charging, simultaneously meet the charging needs of batteries in different power supply areas.

[0015] Furthermore, the second power supply component includes: a third battery module for storing the low-voltage power; and a second power output port connected to the third battery module, which supplies power to the low-voltage electrical components of the vehicle via a low-voltage wiring harness.

[0016] Based on the above technical means, the embodiments of this application can provide power to low-voltage electrical components by setting a second power output port and connecting it to the vehicle's low-voltage network through a low-voltage wiring harness.

[0017] Furthermore, the low-voltage electrical components include low-voltage loads and / or controllers.

[0018] Furthermore, it also includes: a battery pack body, wherein the battery pack body is provided with the first power supply component, the second power supply component, and the switching component.

[0019] A second aspect of this application provides a vehicle power system, including: a high-voltage electrical component and a low-voltage electrical component; and a power battery pack as described in the above embodiments, used to simultaneously supply power to the high-voltage electrical component and the low-voltage electrical component.

[0020] A third aspect of this application provides a vehicle including the vehicle power system described in the above embodiments.

[0021] Therefore, this application has at least the following beneficial effects:

[0022] (1) The embodiments of this application can convert high voltage power supply to low voltage power supply through the switching component, and can intelligently control the output of low voltage power supply of the vehicle according to the low voltage power demand of the vehicle, replacing the traditional lead-acid lithium battery as low voltage power supply and low voltage power converter DCDC, reducing the cost of the vehicle, and the vehicle also achieves a certain degree of weight reduction.

[0023] (2) The embodiments of this application can convert high voltage power supply into low voltage power supply through voltage conversion circuit, without the need to use low voltage converter DCDC, thus avoiding the problems of difficulty in DCDC design and selection and subsequent power limitation.

[0024] (3) In this embodiment, the relationship between the first battery modules can be controlled by the control unit, the low-voltage power demand of the whole vehicle can be intelligently judged, the series and parallel connection relationship of the battery modules in the switching component can be changed, and the battery modules can be allocated to different power supply areas to provide power.

[0025] (4) In this embodiment of the application, a first power output port can be set up to connect the high voltage network of the whole vehicle through a high voltage harness to supply power to the high voltage electrical components.

[0026] (5) The embodiments of this application provide a charging input port and use high voltage charging to meet the charging needs of batteries in different power supply areas.

[0027] (6) In this embodiment of the application, a second power output port can be set up to connect the low-voltage network of the whole vehicle through a low-voltage wiring harness to supply power to the low-voltage electrical components.

[0028] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0029] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of the frame of a power battery pack according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of a power battery pack according to an embodiment of this application;

[0032] Figure 3 This is a circuit diagram of the switching area provided according to an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the connection of a vehicle power system according to an embodiment of this application. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0035] The related technologies mention a battery pack matching method and matching system, and a cylindrical battery pack with high current discharge mentions a high-power discharge battery, but neither of them involves the output of high and low voltage power battery packs.

[0036] The following description, with reference to the accompanying drawings, outlines an embodiment of the power battery pack, vehicle power system, and vehicle of this application. Addressing the aforementioned background issues, the current power supply system for new energy vehicles relies on the power battery pack for high-voltage power and a DC-DC converter for low-voltage power. However, current industry practice dictates that DC-DC converter selection is based on theoretical design and experience, and cost pressures may lead to limitations in future vehicle model expansion. This application provides a power battery pack in which the vehicle power system no longer uses traditional lead-acid lithium batteries as low-voltage power sources or DC-DC converters. The vehicle's low-voltage power requirements are met through the low-voltage output port in the low-voltage zone, connected via wiring harnesses to various low-voltage loads and controllers throughout the vehicle. This solves the problems of high cost in new energy vehicle battery supply systems and the limitations of DC-DC converters in adapting to different vehicle models and subsequent power outputs.

[0037] Specifically, Figure 1 This is a schematic diagram of the frame of a power battery pack provided in an embodiment of this application.

[0038] like Figure 1 As shown, the power battery pack 10 includes: a first power supply component 11, a second power supply component 12, and a switching component 13.

[0039] The first power supply component 11 is used to provide the vehicle with a high-voltage power supply with a voltage greater than a first preset voltage; the second power supply component 12 is used to provide the vehicle with a low-voltage power supply with a voltage less than a second preset voltage, wherein the first preset voltage is greater than the second preset voltage; the switching component 13 is used to isolate the first power supply area where the first power supply component is located and the second power supply area where the second power supply component is located, convert the high-voltage power supply in the first power supply area into a low-voltage power supply, and control the output of the low-voltage power supply of the second power supply component according to the low-voltage power demand of the vehicle.

[0040] The first preset voltage and the second preset voltage can be set according to specific circumstances, and this value is not specifically limited. The first preset voltage is greater than the second preset voltage. The first power supply area can be understood as a high-voltage area, and the second power supply area can be understood as a low-voltage area. The switching components are located in the switching area.

[0041] The switching component 13 is used to isolate the first power supply area where the first power supply component is located and the second power supply area where the second power supply component is located. The switching component can convert the high voltage power in the first power supply area into low voltage power and control the output of low voltage power from the second power supply component according to the low voltage power demand of the vehicle.

[0042] The switching component 13 includes a voltage conversion circuit and a control unit.

[0043] The voltage conversion circuit is used to convert the high-voltage power supply in the first power supply area into a low-voltage power supply, and the control unit is used to control the output of low-voltage power supply of the second power supply component according to the low-voltage power demand of the vehicle.

[0044] In this embodiment of the application, the switching component 13 further includes a first battery module. The control unit is used to control the series and parallel connection relationship of the first battery module. If it is detected that the actual low-voltage power demand of the vehicle is greater than the maximum output power of the second power supply component, the first battery module is controlled to be connected in series to the second power supply area to provide low-voltage power. When the actual low-voltage power demand is less than or equal to the maximum output power, the first battery module is controlled to be connected in parallel to the first power supply area to provide high-voltage power.

[0045] Understandably, in addition to converting high-voltage power to low-voltage power, the switching component can also intelligently determine the actual low-voltage operating power of the entire vehicle and change the series and parallel connection relationship of the first battery module inside the switching area by controlling the power supply, thereby distributing the first battery module to the low-voltage area and the high-voltage area.

[0046] Specifically, when the actual low-voltage power demand of the vehicle is detected to be greater than the maximum output power of the second power supply component, the control unit will borrow the first battery module from the exchange area and connect it in series to the low-voltage area to provide low-voltage power. When the actual low-voltage power demand is less than or equal to the maximum output power, the borrowed first battery module will be returned to provide high-voltage power to the high-voltage area.

[0047] In this embodiment, the first power supply component 11 includes a second battery module and a first power output port.

[0048] The second battery module is used to store high-voltage power; the first power output port is connected to the second battery module and supplies power to the high-voltage electrical components of the vehicle through a high-voltage wiring harness.

[0049] The first power output port can be understood as the high-voltage power output port.

[0050] It is understood that the embodiments of this application are provided with a high-voltage power output port, which can be connected to the vehicle's high-voltage power network through a high-voltage wiring harness to provide high-voltage power to the vehicle's high-voltage load.

[0051] In this embodiment, the first power supply component 11 further includes a charging input port, which is connected to the vehicle's charging port via a high-voltage wiring harness to receive electrical energy from the charging port to charge the second battery module.

[0052] It is understood that the embodiments of this application also include a charging input port, which uses high voltage to charge the second battery module.

[0053] In this embodiment, the second power supply component 12 includes: a third battery module and a second power output port.

[0054] The third battery module is used to store low-voltage power; the second power output port is connected to the third battery module and supplies power to the low-voltage electrical components of the vehicle through the low-voltage wiring harness.

[0055] The second power output port can be understood as a low-voltage power output port.

[0056] Low-voltage electrical components include low-voltage loads and / or controllers.

[0057] It is understood that the embodiments of this application are provided with a low-voltage power output port, which can be connected to the vehicle's low-voltage power network through a low-voltage wiring harness to provide low-voltage power to the vehicle's low-voltage loads and controller ECU.

[0058] In this embodiment of the application, the power battery pack 10 further includes: a battery pack body.

[0059] The battery pack contains a first power supply component, a second power supply component, and a switching component.

[0060] It should be noted that the power battery pack itself is composed of multiple 5V batteries connected in series and parallel.

[0061] Specifically, the power battery pack, such as Figure 2 As shown, the interior can be divided into a high-voltage area and a switching area (the internal circuit diagram of the switching area is shown in the figure). Figure 3 (As shown), the low-voltage zone. The high-voltage zone is mainly responsible for the output of high-voltage power. The switching zone contains intelligent control circuits, voltage conversion circuits, and battery modules. Besides converting high-voltage to low-voltage, the switching zone can also determine the actual low-voltage operating power of the vehicle based on the intelligent control system. Through the intelligent control circuit, it changes the series and parallel connection relationship of the battery modules within the switching zone, thus distributing battery modules to the low-voltage and high-voltage zones. The low-voltage zone is mainly responsible for low-voltage power output, but the modules set in the low-voltage zone are generally lower than the maximum low-voltage power of the vehicle, meeting the basic requirements for vehicle startup. When the vehicle is running and the power output exceeds the maximum output power of the low-voltage zone, the intelligent control system borrows battery modules from the switching zone to meet the actual power demand of the low-voltage zone. When the operating power decreases, the borrowed battery modules are returned for use in the high-voltage zone. In addition, a high-voltage power output port is located externally on the power battery pack, connected to the vehicle's high-voltage power network via a wiring harness; providing high-voltage power to the vehicle's high-voltage loads. A low-voltage power port is provided, which connects to the vehicle's low-voltage power network via a wiring harness to provide low-voltage power to the vehicle's low-voltage loads and the ECU controller. An external charging port is also provided, employing high-voltage charging to simultaneously meet the charging needs of the battery in both high-voltage and low-voltage areas.

[0062] In summary, the power battery pack proposed in this application, compared to the traditional power battery pack which can only output high-voltage power, features intelligent zone control that allows for both high and low voltage output and distribution. Internally, it is divided into a high-voltage zone, an exchange zone, and a low-voltage zone through circuit connections and isolation. When outputting high-voltage power, the intelligent control unit, as with conventional systems, provides the required high-voltage power to the vehicle through the high-voltage connection port. Conversely, when outputting low-voltage power, the intelligent control unit, based on the vehicle's operating power, provides the required low-voltage power to the vehicle through the low-voltage wiring harness connection port.

[0063] According to the power battery pack proposed in this application embodiment, a high-voltage power supply can be converted into a low-voltage power supply through a switching component. It can also intelligently control the vehicle's low-voltage power output based on the vehicle's low-voltage power demand, replacing the traditional lead-acid lithium battery as the low-voltage power supply and the low-voltage power converter DC-DC converter, thus reducing vehicle costs and achieving a certain degree of vehicle weight reduction. A voltage conversion circuit can convert high-voltage power to low-voltage power, eliminating the need for a low-voltage converter DC-DC converter, avoiding the difficulties in DC-DC design and selection and subsequent power limitations. A control unit can control the relationship between the first battery modules, intelligently determining the vehicle's low-voltage power demand and changing the series and parallel connection relationships of the battery modules in the switching component to distribute power to different power supply areas. A first power output port can be set up to connect to the vehicle's high-voltage network via a high-voltage wiring harness to supply power to high-voltage electrical components. A charging input port can be set up to use high-voltage charging, simultaneously meeting the charging needs of batteries in different power supply areas. A second power output port can be set up to connect to the vehicle's low-voltage network via a low-voltage wiring harness to supply power to low-voltage electrical components.

[0064] The following embodiment is a vehicle power system proposed according to the embodiments of this application, including: high-voltage electrical components and low-voltage electrical components, and a power battery pack.

[0065] The power battery pack is used to supply power to both high-voltage and low-voltage electrical components simultaneously.

[0066] Specifically, such as Figure 4 As shown, the power battery pack outputs high-voltage power during vehicle operation. Based on the real-time operating conditions of the vehicle, the electronic control unit coordinates and controls the power battery pack to simultaneously output low-voltage power that meets the power requirements of the entire vehicle. Through the electronic control unit, the series and parallel circuits inside the battery pack are intelligently controlled according to the actual load of the vehicle to realize the output of high-voltage power and low-voltage power.

[0067] In summary, the vehicle power system will no longer use traditional lead-acid lithium batteries as low-voltage power sources and low-voltage power converters (DCDC). The vehicle's low-voltage power requirements will be met through the low-voltage output port in the low-voltage zone, which will be connected to various low-voltage loads and controllers in the vehicle via wiring harnesses. This reduces the overall vehicle cost and also achieves a certain degree of weight reduction.

[0068] It should be noted that the foregoing explanation of the power battery pack embodiment also applies to the vehicle power system of this embodiment, and will not be repeated here.

[0069] According to the vehicle power system proposed in the embodiments of this application, the traditional lead-acid lithium battery is no longer used as the low-voltage power source, nor is a low-voltage power converter (DCDC). The low-voltage power requirements of the whole vehicle are connected to the various low-voltage loads and controllers of the whole vehicle through the low-voltage power output port in the low-voltage zone via wiring harnesses. The overall vehicle cost is reduced, and the whole vehicle is also made lighter. This solves the problems of difficult DCDC design and selection and subsequent power limitations, and realizes intelligent control of the vehicle power system.

[0070] This application also provides a vehicle including the vehicle power system as described in the above embodiments.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0073] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0074] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0075] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments.

[0076] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A power battery pack, characterized in that, include: The first power supply component is used to provide the vehicle with a high-voltage power supply with a voltage greater than a first preset voltage; The second power supply component is used to provide the vehicle with a low-voltage power supply with a voltage lower than a second preset voltage, wherein the first preset voltage is greater than the second preset voltage; A switching component is used to isolate the first power supply area where the first power supply component is located and the second power supply area where the second power supply component is located, convert the high-voltage power supply of the first power supply area into a low-voltage power supply, and control the output of the second power supply component to output a low-voltage power supply according to the low-voltage power demand of the vehicle. The switching component includes: A voltage conversion circuit is used to convert the high-voltage power supply into a low-voltage power supply; The control unit controls the second power supply component to output low-voltage power. The switching component also includes a first battery module. The control unit is used to control the series and parallel connection relationship of the first battery module. If it is detected that the actual low-voltage power demand of the vehicle is greater than the maximum output power of the second power supply component, the first battery module is controlled to be connected in series to the second power supply area to provide low-voltage power. When the actual low-voltage power demand is less than or equal to the maximum output power, the first battery module is controlled to be connected in parallel to the first power supply area to provide high-voltage power.

2. The power battery pack according to claim 1, characterized in that, The first power supply component includes: The second battery module is used to store the high-voltage power. The first power output port is connected to the second battery module and supplies power to the high-voltage electrical components of the vehicle through a high-voltage wiring harness.

3. The power battery pack according to claim 2, characterized in that, The first power supply component also includes: The charging input port is connected to the vehicle's charging port via a high-voltage wiring harness, and receives electrical energy from the charging port to charge the second battery module.

4. The power battery pack according to claim 1, characterized in that, The second power supply component includes: The third battery module is used to store the low-voltage power supply; The second power output port is connected to the third battery module and supplies power to the low-voltage electrical components of the vehicle through a low-voltage wiring harness.

5. The power battery pack according to claim 4, characterized in that, The low-voltage electrical components include low-voltage loads and / or controllers.

6. The power battery pack according to claim 1, characterized in that, Also includes: The battery pack body contains the first power supply component, the second power supply component, and the switching component.

7. A vehicle power supply system, characterized in that, include: High-voltage electrical components and low-voltage electrical components; The power battery pack as described in any one of claims 1-6 is used to simultaneously supply power to the high-voltage electrical components and the low-voltage electrical components.

8. A vehicle, characterized in that, Includes the vehicle power system as described in claim 7.

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