Electric vehicle battery adapter and electric vehicle

Abstract

The electric vehicle battery adapter comprises an input module, a DC conversion module, a processing unit and an output module, the input end of the input module is connected with an electric door lock wiring harness on the electric vehicle, and the output end of the input module is respectively connected with the first end of the DC conversion module and the first end of the processing unit; the DC conversion module is connected with the processing unit, and the processing unit is configured to convert voltage signals and current signals obtained by the input voltage dividing sampling circuit and the first current sampling circuit in the input module into control signals of the DC conversion module; the second end of the DC conversion module and the second end of the processing unit are connected with the input end of the output module. The output end of the output module is connected with a motor controller wire harness on the electric vehicle. According to the utility model, the voltage locking voltage of the electric vehicle controller is changed through a voltage boosting or reducing method, so that the voltage application range of different batteries can be simulated, and the controller can effectively and properly carry out under-voltage protection on the batteries.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and more specifically, to an electric vehicle battery adapter and an electric vehicle. Background Art

[0002] In the electric vehicle sector, the diversification and innovation of battery technology continues to drive improvements in EV performance. However, the voltage ranges of different battery types, such as traditional lead-acid batteries and emerging lithium-ion or sodium-ion batteries, vary significantly, posing challenges to EV compatibility and performance optimization. In particular, EV controllers typically rely on battery voltage monitoring for undervoltage protection. This design works well with a single battery type, but is inflexible when faced with a diverse range of battery options.

[0003] Existing electric vehicle controller designs are often fixed to the voltage range of a specific battery type. This means that when changing battery types, the controller's undervoltage protection mechanism must be readjusted or even the entire controller replaced. This not only increases maintenance costs but also limits the flexibility of battery replacement. For example, when a user wants to upgrade from a traditional lead-acid battery system to a higher energy density sodium-ion battery system, the controller's voltage detection and protection mechanisms often cannot adapt to the new voltage operating range, resulting in reduced system stability. In particular, as sodium-ion batteries have gained popularity due to their superior low-temperature performance, more and more electric vehicles are beginning to adopt sodium-ion batteries, but the limitations of traditional controllers have become a major obstacle to this transition. Utility Model Content

[0004] The utility model is to overcome the technical problems existing in the above prior art and provide an electric vehicle battery adapter and an electric vehicle.

[0005] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0006] An electric vehicle battery adapter, comprising an input module, a DC conversion module, a processing unit and an output module, wherein:

[0007] The input end of the input module is connected to the electric door lock harness on the electric vehicle, and the output end of the input module is respectively connected to the first end of the DC conversion module and the first end of the processing unit;

[0008] The input module includes an input voltage dividing sampling circuit, a first current sampling circuit and a power supply circuit;

[0009] The processing unit includes a processing chip U1, the DC conversion module is connected to the processing unit, and the processing unit is configured to convert the voltage signal and current signal obtained by the input voltage divider sampling circuit and the first current sampling circuit into a control signal of the DC conversion module;

[0010] The second end of the DC conversion module and the second end of the processing unit are both connected to the input end of the output module;

[0011] The output module includes an output voltage dividing sampling circuit and a second current sampling circuit, and the output end of the output module is connected to the motor controller wiring harness on the electric vehicle.

[0012] Furthermore, the input voltage divider sampling circuit includes a resistor R4, a resistor R7, a resistor R9, a resistor R10 and a capacitor C12, wherein:

[0013] The first end of the resistor R4 is connected to the input voltage, and the second end of the resistor R4 is connected to the first end of the resistor R7, the first end of the resistor R9, and the first end of the resistor R10;

[0014] The second end of the resistor R7 is connected to the first end of the capacitor C12 and then connected to the pin 19 of the processing chip U1;

[0015] The second end of the capacitor C12 , the second end of the resistor R9 , and the second end of the resistor R10 are all grounded.

[0016] Furthermore, the first current sampling circuit includes a resistor R5, a resistor R8 and a capacitor C8, wherein:

[0017] A first end of the resistor R5 is connected to a 15V voltage source, and a second end of the resistor R5 is connected to a first end of the resistor R8;

[0018] The second end of the resistor R5 is connected to the first end of the capacitor C8 and then connected to the pin 14 of the processing chip U1;

[0019] A second end of the resistor R8 and a second end of the capacitor C8 are both grounded.

[0020] Furthermore, the DC conversion module includes a resistor R11, a resistor R13, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a transistor Q1, a transistor Q2, a transistor Q3, a field effect transistor Q4, a transistor Q5, an inductor L2, a diode D2 and a capacitor C9, wherein:

[0021] A first end of the resistor R16 is connected to the pin 16 of the processing chip U1 and the base of the transistor Q3;

[0022] The collector of the transistor Q3 is connected to the base of the transistor Q1 and then to the first end of the resistor R11, and the emitter of the transistor Q3 is connected to the first end of the resistor R17;

[0023] The second end of the resistor R11, the emitter of the transistor Q1, and the collector of the transistor Q2 are all connected to a 15V voltage source;

[0024] The collector of the transistor Q1 is connected to the base of the transistor Q2 and then connected to the first end of the resistor R18;

[0025] The emitter of the transistor Q2 is connected to the first end of the resistor R13, and the second end of the resistor R13 is connected to the emitter of the transistor Q5, the first end of the resistor R15, and the gate of the field effect transistor Q4;

[0026] The second end of the resistor R16, the second end of the resistor R17, the second end of the resistor R18, the collector of the transistor Q5, and the second end of the resistor R15 are all grounded;

[0027] The drain of the field effect transistor Q4 is connected to the first end of the inductor L2 and the anode of the diode D2. The second end of the inductor L2 is connected to the first end of the capacitor C9 and then to the input voltage. The cathode of the diode D2 is connected to the second end of the capacitor C9.

[0028] Furthermore, the second current sampling circuit includes a resistor R14, a resistor R19 and a capacitor C15, wherein:

[0029] The first end of the resistor R19 is connected to the first end of the resistor R14 and then connected to the source of the field effect transistor Q4;

[0030] The second end of the resistor R14 is connected to the first end of the capacitor C15 and then to the pin 20 of the processing chip U1;

[0031] A second end of the resistor R19 and a second end of the capacitor C15 are both grounded.

[0032] Furthermore, the output voltage divider sampling circuit includes a resistor R21, a resistor R22, a resistor R23, a resistor R24 ​​and a capacitor C5, wherein:

[0033] The first end of the resistor R21 is connected to the output voltage, and the second end of the resistor R21 is connected to the first end of the resistor R22, the first end of the resistor R23, and the first end of the resistor R24;

[0034] The second end of the resistor R22 is connected to the first end of the capacitor C5 and then to the pin 2 of the processing chip U1;

[0035] The second end of the capacitor C5 , the second end of the resistor R23 , and the second end of the resistor R24 ​​are all grounded.

[0036] Furthermore, the cathode of the diode D2 is connected to the first end of the capacitor C10, the first end of the capacitor C11, and then to the first end of the resistor R21;

[0037] The second end of the capacitor C10 and the second end of the capacitor C11 are both grounded.

[0038] An electric vehicle is equipped with the above-mentioned electric vehicle battery adapter.

[0039] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0040] The utility model provides an electric vehicle battery adapter and an electric vehicle, which changes the lock line voltage of the electric vehicle controller by a step-up or step-down method to simulate the voltage usage range of different batteries, thereby making the controller effective and appropriate in protecting the battery from undervoltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 This is a system block diagram of the electric vehicle battery adapter of the utility model;

[0043] Figure 2 This is a circuit diagram of the electric vehicle battery adapter of the present utility model;

[0044] Explanation of the markings in the figure: 1. Input module; 2. DC conversion module; 3. Processing unit; 4. Output module. DETAILED DESCRIPTION

[0045] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described in order to avoid confusion with the present application.

[0046] It should be understood that the present application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the disclosure thorough and complete and to fully convey the scope of the present application to those skilled in the art. In the drawings, the dimensions and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals throughout represent like elements.

[0047] Unless otherwise expressly specified or limited, terms such as "installed," "installed," "connected," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0048] In order to fully understand the present application, a detailed structure will be provided in the following description to illustrate the technical solution proposed in the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods.

[0049] Example 1:

[0050] like Figure 1 As shown, the utility model provides a technical solution:

[0051] An electric vehicle battery adapter, comprising an input module 1, a DC conversion module 2, a processing unit 3 and an output module 4, wherein:

[0052] The input end of the input module 1 is connected to the electric door lock wiring harness on the electric vehicle, and the output end of the input module 1 is connected to the first end of the DC conversion module 2 and the first end of the processing unit 3 respectively;

[0053] The input module 1 includes an input voltage dividing sampling circuit, a first current sampling circuit and a power supply circuit;

[0054] The processing unit 3 includes a processing chip U1, the DC conversion module 2 is connected to the processing unit 3, and the processing unit 3 is configured to convert the voltage signal and current signal obtained by the input voltage divider sampling circuit and the first current sampling circuit into a control signal of the DC conversion module 2;

[0055] The second end of the DC conversion module 2 and the second end of the processing unit 3 are both connected to the input end of the output module 4;

[0056] The output module 4 includes an output voltage dividing sampling circuit and a second current sampling circuit, and the output end of the output module 4 is connected to the motor controller wiring harness on the electric vehicle.

[0057] In existing technology, electric vehicle controllers typically determine battery voltage by detecting the voltage on the vehicle's lock line, thereby implementing undervoltage protection. With the continuous emergence of various new energy sources, the operating voltage ranges of various battery types vary, creating challenges when replacing different batteries. This utility model provides an innovative solution to this problem.

[0058] In this embodiment, the lock line voltage of the electric vehicle controller is changed by a method of stepping up or down to simulate the voltage usage range of different batteries, so that the controller can effectively and appropriately protect the battery from undervoltage. The wiring harness (hereinafter referred to as the lock line) connecting the electric door lock and the motor controller in the electric vehicle is disconnected. The input end of the device is connected to the lock line of the electric vehicle, the output end is connected to the lock line of the motor controller, and one end is connected to 0V (ground). Among them, the input module is used for sampling the voltage and current of the lock line input end and powering the device; the output module is used for sampling and outputting the voltage and current of the lock line output end; the DC conversion module is used to convert the voltage of the lock line input end into a suitable voltage of the lock line output end; the processing unit is used to convert the voltage and current signals of the lock line input end into the control signal of the DC conversion module, control the DC conversion module to output the appropriate voltage and current of the lock line output end, and implement protection when an abnormal situation occurs.

[0059] Example 2:

[0060] Based on Example 1, Figure 2 Capacitors C3, C4, resistors R4, R7, R9, R12, and C12, along with chips U2 and U3, form the input module. R4-C12 form the input voltage divider sampling circuit, while chips U2 and U3 form the internal power supply circuit. Capacitors C10, C11, R21-R24, and C5 form the output module. R21-R24, C5, resistors R19, R14, and C15 form the output voltage divider sampling and current sampling circuits. Inductor L2, diode D2, and Q1-Q5 form the DC conversion module. Chip U1 and peripheral components form the processing unit. Signals from the input voltage divider sampling circuit and feedback signals from the output voltage divider sampling circuit and current sampling circuit are fed into the processing unit. After processing, the processing unit outputs control signals to the DC conversion module, which converts the input voltage and current into the required voltage and current, which are then output via the output module.

[0061] Specifically, the input voltage divider sampling circuit includes a resistor R4, a resistor R7, a resistor R9, a resistor R10 and a capacitor C12, wherein:

[0062] The first end of the resistor R4 is connected to the input voltage, and the second end of the resistor R4 is connected to the first end of the resistor R7, the first end of the resistor R9, and the first end of the resistor R10;

[0063] The second end of the resistor R7 is connected to the first end of the capacitor C12 and then connected to the pin 19 of the processing chip U1;

[0064] The second end of the capacitor C12 , the second end of the resistor R9 , and the second end of the resistor R10 are all grounded.

[0065] Furthermore, the first current sampling circuit includes a resistor R5, a resistor R8 and a capacitor C8, wherein:

[0066] A first end of the resistor R5 is connected to a 15V voltage source, and a second end of the resistor R5 is connected to a first end of the resistor R8;

[0067] The second end of the resistor R5 is connected to the first end of the capacitor C8 and then connected to the pin 14 of the processing chip U1;

[0068] A second end of the resistor R8 and a second end of the capacitor C8 are both grounded.

[0069] Furthermore, the DC conversion module includes a resistor R11, a resistor R13, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a transistor Q1, a transistor Q2, a transistor Q3, a field effect transistor Q4, a transistor Q5, an inductor L2, a diode D2 and a capacitor C9, wherein:

[0070] A first end of the resistor R16 is connected to the pin 16 of the processing chip U1 and the base of the transistor Q3;

[0071] The collector of the transistor Q3 is connected to the base of the transistor Q1 and then to the first end of the resistor R11, and the emitter of the transistor Q3 is connected to the first end of the resistor R17;

[0072] The second end of the resistor R11, the emitter of the transistor Q1, and the collector of the transistor Q2 are all connected to a 15V voltage source;

[0073] The collector of the transistor Q1 is connected to the base of the transistor Q2 and then connected to the first end of the resistor R18;

[0074] The emitter of the transistor Q2 is connected to the first end of the resistor R13, and the second end of the resistor R13 is connected to the emitter of the transistor Q5, the first end of the resistor R15, and the gate of the field effect transistor Q4;

[0075] The second end of the resistor R16, the second end of the resistor R17, the second end of the resistor R18, the collector of the transistor Q5, and the second end of the resistor R15 are all grounded;

[0076] The drain of the field effect transistor Q4 is connected to the first end of the inductor L2 and the anode of the diode D2. The second end of the inductor L2 is connected to the first end of the capacitor C9 and then to the input voltage. The cathode of the diode D2 is connected to the second end of the capacitor C9.

[0077] Furthermore, the second current sampling circuit includes a resistor R14, a resistor R19 and a capacitor C15, wherein:

[0078] The first end of the resistor R19 is connected to the first end of the resistor R14 and then connected to the source of the field effect transistor Q4;

[0079] The second end of the resistor R14 is connected to the first end of the capacitor C15 and then to the pin 20 of the processing chip U1;

[0080] A second end of the resistor R19 and a second end of the capacitor C15 are both grounded.

[0081] Furthermore, the output voltage divider sampling circuit includes a resistor R21, a resistor R22, a resistor R23, a resistor R24 ​​and a capacitor C5, wherein:

[0082] The first end of the resistor R21 is connected to the output voltage, and the second end of the resistor R21 is connected to the first end of the resistor R22, the first end of the resistor R23, and the first end of the resistor R24;

[0083] The second end of the resistor R22 is connected to the first end of the capacitor C5 and then to the pin 2 of the processing chip U1;

[0084] The second end of the capacitor C5 , the second end of the resistor R23 , and the second end of the resistor R24 ​​are all grounded.

[0085] Furthermore, the cathode of the diode D2 is connected to the first end of the capacitor C10, the first end of the capacitor C11, and then to the first end of the resistor R21;

[0086] The second end of the capacitor C10 and the second end of the capacitor C11 are both grounded.

[0087] Example 3:

[0088] The utility model provides a technical solution:

[0089] An electric vehicle is equipped with the above-mentioned electric vehicle battery adapter.

[0090] All components used in this application (without specific structural descriptions) are standard components or components known to those skilled in the art. Their structures and principles are readily known to those skilled in the art through technical manuals or routine experimental methods. Furthermore, the software programs involved in this application are all prior art, and this application does not involve any improvements to the software programs.

[0091] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely illustrative and are not intended to limit the scope of the present application. Various changes and modifications may be made therein by those skilled in the art without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0092] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various application aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this approach of the present application should not be interpreted as reflecting the intention that the claimed application requires more features than those explicitly recited in each claim. More precisely, as reflected in the corresponding claims, the point of the application is that the corresponding technical problem can be solved with fewer features than all the features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present application.

[0093] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0094] It should be noted that the above embodiments are illustrative rather than limiting of the present application, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The use of the words first, second, and third, etc., does not denote any order. These words may be interpreted as designations.

Claims

1. An electric vehicle battery adapter, characterized in that: The electric vehicle battery adapter includes an input module, a DC conversion module, a processing unit and an output module, wherein: The input end of the input module is connected to the electric door lock harness on the electric vehicle, and the output end of the input module is respectively connected to the first end of the DC conversion module and the first end of the processing unit; The input module includes an input voltage dividing sampling circuit, a first current sampling circuit and a power supply circuit; The processing unit includes a processing chip U1, the DC conversion module is connected to the processing unit, and the processing unit is configured to convert the voltage signal and current signal obtained by the input voltage divider sampling circuit and the first current sampling circuit into a control signal of the DC conversion module; The second end of the DC conversion module and the second end of the processing unit are both connected to the input end of the output module; The output module includes an output voltage dividing sampling circuit and a second current sampling circuit, and the output end of the output module is connected to the motor controller wiring harness on the electric vehicle.

2. The electric vehicle battery adapter according to claim 1, characterized in that: The input voltage divider sampling circuit includes a resistor R4, a resistor R7, a resistor R9, a resistor R10 and a capacitor C12, wherein: The first end of the resistor R4 is connected to the input voltage, and the second end of the resistor R4 is connected to the first end of the resistor R7, the first end of the resistor R9, and the first end of the resistor R10; The second end of the resistor R7 is connected to the first end of the capacitor C12 and then connected to the pin 19 of the processing chip U1; The second end of the capacitor C12 , the second end of the resistor R9 , and the second end of the resistor R10 are all grounded.

3. The electric vehicle battery adapter according to claim 1, characterized in that: The first current sampling circuit includes a resistor R5, a resistor R8 and a capacitor C8, wherein: A first end of the resistor R5 is connected to a 15V voltage source, and a second end of the resistor R5 is connected to a first end of the resistor R8; The second end of the resistor R5 is connected to the first end of the capacitor C8 and then connected to the pin 14 of the processing chip U1; A second end of the resistor R8 and a second end of the capacitor C8 are both grounded.

4. The electric vehicle battery adapter according to claim 1, characterized in that: The DC conversion module includes a resistor R11, a resistor R13, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a transistor Q1, a transistor Q2, a transistor Q3, a field effect transistor Q4, a transistor Q5, an inductor L2, a diode D2 and a capacitor C9, wherein: A first end of the resistor R16 is connected to the pin 16 of the processing chip U1 and the base of the transistor Q3; The collector of the transistor Q3 is connected to the base of the transistor Q1 and then to the first end of the resistor R11, and the emitter of the transistor Q3 is connected to the first end of the resistor R17; The second end of the resistor R11, the emitter of the transistor Q1, and the collector of the transistor Q2 are all connected to a 15V voltage source; The collector of the transistor Q1 is connected to the base of the transistor Q2 and then connected to the first end of the resistor R18; The emitter of the transistor Q2 is connected to the first end of the resistor R13, and the second end of the resistor R13 is connected to the emitter of the transistor Q5, the first end of the resistor R15, and the gate of the field effect transistor Q4; The second end of the resistor R16, the second end of the resistor R17, the second end of the resistor R18, the collector of the transistor Q5, and the second end of the resistor R15 are all grounded; The drain of the field effect transistor Q4 is connected to the first end of the inductor L2 and the anode of the diode D2. The second end of the inductor L2 is connected to the first end of the capacitor C9 and then to the input voltage. The cathode of the diode D2 is connected to the second end of the capacitor C9.

5. The electric vehicle battery adapter according to claim 4, characterized in that: The second current sampling circuit includes a resistor R14, a resistor R19 and a capacitor C15, wherein: The first end of the resistor R19 is connected to the first end of the resistor R14 and then connected to the source of the field effect transistor Q4; The second end of the resistor R14 is connected to the first end of the capacitor C15 and then to the pin 20 of the processing chip U1; A second end of the resistor R19 and a second end of the capacitor C15 are both grounded.

6. The electric vehicle battery adapter according to claim 4, characterized in that: The output voltage divider sampling circuit includes a resistor R21, a resistor R22, a resistor R23, a resistor R24 ​​and a capacitor C5, wherein: The first end of the resistor R21 is connected to the output voltage, and the second end of the resistor R21 is connected to the first end of the resistor R22, the first end of the resistor R23, and the first end of the resistor R24; The second end of the resistor R22 is connected to the first end of the capacitor C5 and then to the pin 2 of the processing chip U1; The second end of the capacitor C5 , the second end of the resistor R23 , and the second end of the resistor R24 ​​are all grounded.

7. The electric vehicle battery adapter according to claim 6, characterized in that: The cathode of the diode D2 is connected to the first end of the capacitor C10, the first end of the capacitor C11, and then to the first end of the resistor R21; The second end of the capacitor C10 and the second end of the capacitor C11 are both grounded.

8. An electric vehicle, characterized in that: The electric vehicle is equipped with the electric vehicle battery adapter according to any one of claims 1 to 7.

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