A multi-string cell simulation board
Patent Information
- Application Number
- CN202521849637.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-08-29
AI Technical Summary
目前现有的电芯模拟板普遍存在可控性能差与测试安全性低的问题，因此需进一步提出改进
1.本实用新型解决了真实电芯的不可控性问题，电芯模拟板的优势是可以通过电子电路精确调节输出电压、内阻等参数，可实时、灵活地模拟任意故障状态，无需依赖真实电芯的物理变化，大幅提升测试效率；
Smart Images
Figure CN224720197U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cell simulation technology, specifically a multi-cell simulation board. Background Technology
[0002] Cell simulation boards are key tools in the development, testing, and verification of battery management systems (BMS), primarily used to simulate the electrical characteristics of real battery cells. Currently, existing cell simulation boards generally suffer from poor controllability and low testing safety, thus requiring further improvements. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a multi-cell simulation board, which can effectively solve the problems mentioned in the background art.
[0004] To solve the above problems, the technical solution adopted by this utility model is: a multi-cell simulation board, including a power supply, terminals, a first row of pins, an adjustable resistor, an LED indicator module, a DIP switch, and a second row of pins. The terminals are connected to the power supply, and both terminals are connected to the positive terminal of the adjustable resistor. One end of the adjustable resistor is connected in parallel with the first row of pins, and the other end of the adjustable resistor is connected in parallel with the LED indicator module. One end of the DIP switch is connected to the adjustable resistor, and the other end of the DIP switch is connected to the second row of pins. The analog board is equipped with multiple terminals, a first row of pins, an adjustable resistor, an LED indicator module, and a DIP switch. The second row of pins includes H21 and H22, which are connected in parallel.
[0005] Preferably, the LED indicator module includes a resistor and an LED status indicator connected in series; the first pin header is a 2*1 pin header, and the second pin header is a 1*20 pin header.
[0006] Preferably, the analog board has 10 terminals U1-U10 arranged sequentially. The left end of terminal U1 is connected to the positive power input B+, and the right end of terminal U10 is connected to the negative power input GND. The analog board has 20 first row pins H1-H20, 20 adjustable resistors R1-R20, 20 resistors R21-R40, and 20 LED status indicator lights LED1-LED20. The DIP switches include SW1, SW2, and SW3.
[0007] Preferably, the left pins of each node of terminals U1-U10 are connected in series to the fixed terminals of the adjustable resistors numbered odd, and the right pins of each node of terminals U1-U10 are connected to the fixed terminals of the adjustable resistors numbered even; the left and right pins of the first pin row H1-H20 are connected in parallel across each adjustable resistor.
[0008] Preferably, the left fixed pin of the adjustable resistor R1 is connected to the positive power input, and the right adjustment pin of the adjustable resistor R1 is connected to the left fixed pin of the next adjustable resistor on the right; the left fixed pins of the adjustable resistors R2-R19 are connected to the adjustment pin of the previous adjustable resistor, the right adjustment pins of the adjustable resistors R2-R19 are connected to the left fixed pin of the next adjustable resistor, the left fixed pin of the adjustable resistor R20 is connected to the adjustment pin of the adjustable resistor R19, and the right pin of the adjustable resistor R20 is connected to GND.
[0009] Preferably, the right-end pins of resistors R21-R40 are connected to the positive pins of LED status indicator LEDs LED1-LED20 respectively, and then connected in parallel across the two ends of adjustable resistors R1-R20.
[0010] Preferably, the upper pins of the DIP switches SW1 and SW2 are connected to the left fixed pins of each adjustable resistor, and the lower pins of the DIP switches SW1 and SW2 are connected to the pins of the second row of pins H21-H22. The upper pins of the DIP switch SW3 are all connected to ground, and the lower pins of the DIP switch SW3 are connected to the two rightmost pins of the second row of pins H21-H22. Pins 3-22 of the second row of pins H21 and H22 are connected to pins 1-10 of DIP switch SW1 and pins 1-10 of DIP switch SW2. Pins 1-2 of the second row of pins H21 and H22 are connected to pins 1-2 of DIP switch SW3.
[0011] Preferably, pin 1 of the power input pin is connected to the ground of the input power supply, and pin 2 is connected to the input power supply for connecting to an external power supply; the analog board is also provided with a protection board connection interface, pin 1 of the protection board connection interface is connected to the ground of the input power supply, and pin 2 is connected to the input power supply.
[0012] Compared with the prior art, this utility model provides a multi-cell simulation board, which has the following advantages: 1. This utility model solves the problem of uncontrollability of real battery cells. The advantage of the battery cell simulation board is that it can accurately adjust parameters such as output voltage and internal resistance through electronic circuits, and can simulate any fault state in real time and flexibly without relying on the physical changes of real battery cells, thus greatly improving testing efficiency. 2. Improve testing safety. Under extreme conditions such as high voltage (e.g., battery packs above 400V), overcharging (voltage exceeding limits), over-discharging (voltage too low), or short circuit, real battery cells may cause risks such as thermal runaway and fire, directly threatening the safety of testing personnel and equipment. 3. Ensures test consistency and repeatability, and can accurately set and stably output target voltage. Attached Figure Description
[0013] Figure 1 This is a circuit diagram of the present invention. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0015] Reference Figure 1 As a specific embodiment of this utility model: The components include: terminals (U1-U10), 2*1 pin headers / first pin header (H1-H20), adjustable resistors (R1-R20), resistors (R21-R40), LED status indicators (LED1-LED20), DIP switches (SW1-SW3), and 1*20 pin headers / second pin header (H21-H22).
[0016] The onboard power input pin U11 has pin 1 connected to the ground of the input power supply and pin 2 connected to the input power supply for connecting to an external power supply; the protection board connection interface U12 has pin 1 connected to the ground of the input power supply and pin 2 connected to the input power supply, which can be directly connected to the BAT+ (battery positive terminal) and BAT- (battery negative terminal) pins of the protection board under test. Pins 3-22 of H21 and H22 are connected to pins 1-10 of DIP switch SW1 and pins 1-10 of DIP switch SW2. Pins 1-2 of H21 and H22 are connected to pins 1-2 of DIP switch SW3. Through H21-H22, the positive terminal of 20 cells in series and the negative terminal of the first cell in series can be simulated.
[0017] This invention provides a 20-cell battery simulation board to simulate the working state of 20 cells in order to support the testing and verification of the protection board.
[0018] The board integrates 20 independent adjustable resistors R1-R20. The fixed left pin of adjustable resistor R1 is connected to the positive power input, and its adjustment pin is connected to the fixed left pin of the next stage resistor on the right. The fixed left pins of adjustable resistors R2-R19 are connected to the adjustment pins of the previous stage resistor, and their right adjustment pins are connected to the fixed left pins of the next stage resistor. The fixed left pin of adjustable resistor R20 is connected to the adjustment pin of adjustable resistor R19, and its right pin is connected to GND. By adjusting the resistance value of each resistor, the voltage of each simulated cell can be dynamically distributed, accurately simulating the voltage distribution characteristics in a series circuit of actual cells.
[0019] The left and right pins of the first row of pins H1-H20 are connected in parallel across each of the adjustable resistors. The left pins (input side) of each node of terminals U1-U10 are sequentially connected in series to the fixed terminals of the odd-numbered adjustable resistors (e.g., R1, R3, R5…). Simultaneously, the right pins (output side) of each node of U1-U10 are connected to the fixed terminals (positive terminals) of the even-numbered adjustable resistors (e.g., R2, R4, R6…). Users can achieve short-circuiting of the target cell in two ways: first, by connecting a jumper cap to the preset first row of pins; second, by bridging the U1-U10 terminals of the corresponding cell with a wire, thereby quickly simulating the working scenarios of cells with different series numbers.
[0020] After the right-hand pins of resistors (R21-R40) are connected to the positive pins of LED status indicators LED1-LED20 respectively, they are connected in parallel across the two ends of adjustable resistors R1-R20. The working status of each analog cell can be displayed in real time through the LED status indicators.
[0021] SW1 and SW2 are DIP switches. The upper pins of each DIP switch are connected to the left fixed pins of each adjustable resistor (R1-R20), and the lower pins are connected to the pins of H21-H22. The upper pins of SW3 are all connected to ground, and the lower pins are connected to the rightmost two pins of H21-H22. By operating the switch states, the working condition of sudden power failure of the battery cell can be simulated during operation, and the response capability of the protection board to the abnormal power failure of the battery cell can be verified.
[0022] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A multi-cell simulation board, characterized in that, It includes a power supply, terminals, a first pin header, an adjustable resistor, an LED indicator module, a DIP switch, and a second pin header. The terminals are connected to the power supply, and both terminals are connected to the positive terminal of the adjustable resistor. One end of the adjustable resistor is connected in parallel with the first pin header, and the other end is connected in parallel with the LED indicator module. One end of the DIP switch is connected to the adjustable resistor, and the other end is connected to the second pin header. The analog board is equipped with multiple terminals, a first row of pins, an adjustable resistor, an LED indicator module, and a DIP switch. The second row of pins includes H21 and H22, which are connected in parallel.
2. The multi-cell simulation board according to claim 1, characterized in that, The LED indicator module includes a resistor and an LED status indicator connected in series; the first pin header is a 2*1 pin header, and the second pin header is a 1*20 pin header.
3. The multi-cell simulation board according to claim 2, characterized in that, The simulation board has 10 terminals U1-U10 arranged sequentially. The left end of terminal U1 is connected to the positive power input B+, and the right end of terminal U10 is connected to the negative power input GND. The simulation board has 20 first row pins H1-H20, 20 adjustable resistors R1-R20, 20 resistors R21-R40, and 20 LED status indicator lights LED1-LED20. The DIP switches include SW1, SW2, and SW3.
4. A multi-cell simulation board according to claim 3, characterized in that, The left pins of each node of terminals U1-U10 are connected in series to the fixed terminals of the odd-numbered adjustable resistors, and the right pins of each node of terminals U1-U10 are connected to the fixed terminals of the even-numbered adjustable resistors. The left pins of each node of terminals U1-U10 are the input side, and the right pins of each node of terminals U1-U10 are the output side. The left and right pins of the first pin row H1-H20 are connected in parallel across each adjustable resistor.
5. A multi-cell simulation board according to claim 3, characterized in that, The left fixed pin of the adjustable resistor R1 is connected to the positive power input, and the right adjustment pin of the adjustable resistor R1 is connected to the left fixed pin of the next adjustable resistor on the right. The left fixed pins of the adjustable resistors R2-R19 are connected to the adjustment pin of the previous adjustable resistor, and the right adjustment pins of the adjustable resistors R2-R19 are connected to the left fixed pin of the next adjustable resistor. The left fixed pin of the adjustable resistor R20 is connected to the adjustment pin of the adjustable resistor R19, and the right pin of the adjustable resistor R20 is connected to GND.
6. A multi-cell simulation board according to claim 3, characterized in that, The right-hand pins of resistors R21-R40 are connected to the positive pins of LED status indicator LED1-LED20, respectively, and then connected in parallel across the two ends of adjustable resistors R1-R20.
7. A multi-cell simulation board according to claim 3, characterized in that, The upper pins of DIP switches SW1 and SW2 are connected to the left fixed pins of each adjustable resistor, and the lower pins of DIP switches SW1 and SW2 are connected to the pins of the second row of pins H21-H22. The upper pins of DIP switch SW3 are all connected to ground, and the lower pins of DIP switch SW3 are connected to the two rightmost pins of the second row of pins H21-H22. Pins 3-22 of the second row of pins H21 and H22 are connected to pins 1-10 of DIP switch SW1 and pins 1-10 of DIP switch SW2. Pins 1-2 of the second row of pins H21 and H22 are connected to pins 1-2 of DIP switch SW3.
8. A multi-cell simulation board according to claim 1, characterized in that, Pin 1 of the power input pin is connected to the ground of the input power supply, and pin 2 is connected to the input power supply for connecting to an external power supply; the analog board is also provided with a protection board connection interface, pin 1 of the protection board connection interface is connected to the ground of the input power supply, and pin 2 is connected to the input power supply.