A battery module voltage acquisition and equalization device

Abstract

The utility model discloses a kind of battery module voltage acquisition and equalization device, comprising: the voltage acquisition module and equalization module of split type setting, and both are electrically connected by quick plug-in type electrical connector detachably.Equipped with false connection interface unit, it includes fixedly arranged plug-in type terminal group, for connecting battery module according to preset polarity order, fundamentally prevent misconnection;The interface unit is also provided with general adapter interface, and the plug of alligator clip etc. can be replaced to adapt to different module.The equalization module includes a power supply and relay matrix, and the monomer battery is actively balanced by gating mode.The utility model solves the problems of poor equipment compatibility, complicated wiring, poor portability and other problems in the prior art, and has the advantages of reliable connection, easy operation, strong versatility and easy to carry.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a battery module voltage acquisition and equalization device. Background Technology

[0002] In the field of battery testing, especially in laboratory R&D settings, it is often necessary to collect and equalize voltage data from diverse battery modules that lack a Battery Management System (BMS) or whose BMS has failed. Currently, the commonly used solutions suffer from several drawbacks: poor compatibility (connecting the data acquisition harness via soldered FPC flexible circuitry or custom-made fixtures; each fixture is only suitable for a specific module, requiring customization for different projects, resulting in high costs and long lead times); cumbersome and error-prone connections (using numerous harnesses directly connected to universal alligator clips; requiring manual verification of the wiring sequence; complex operation; and a high risk of burning out the acquisition equipment due to incorrect wiring, posing significant safety hazards); and poor portability (existing data acquisition and equalization equipment is mostly an integrated design, bulky and heavy, failing to meet the needs of flexible movement and rapid deployment in laboratories). Therefore, there is an urgent need for a versatile, simple, reliable, and portable battery module voltage acquisition and equalization device. Utility Model Content

[0003] To address the problems of poor compatibility, cumbersome and error-prone wiring, and poor portability in existing battery module testing equipment, this utility model proposes a battery module voltage acquisition and equalization device.

[0004] The specific technical solution is as follows:

[0005] A battery module voltage acquisition and equalization device, comprising:

[0006] The voltage acquisition module is equipped with an anti-misconnection interface unit, which includes a pluggable terminal block group arranged in a fixed order for connecting the battery module in a preset polarity order from battery negative to battery positive.

[0007] Equalization module, the equalization module including power supply and relay matrix;

[0008] The voltage acquisition module and equalization module are separate units, detachably connected via quick-connect electrical connectors. This separate structure and quick-connect design significantly improves the portability and deployment flexibility of the device, allowing for flexible combination or individual use of modules according to testing needs. The fixed-sequence pluggable terminal blocks enable "blind insertion," fundamentally eliminating the risk of equipment burnout due to incorrect wiring sequence, ensuring simple and reliable operation.

[0009] Furthermore, the anti-misconnection interface unit also includes a universal adapter interface, which is electrically connected to the pluggable terminal block. The universal adapter interface is a banana plug. This standard banana plug interface provides a flexible and adaptable adapter layer, allowing users to quickly replace the corresponding plug according to the physical interface form of different battery modules, greatly expanding the device's versatility and applicable scenarios.

[0010] Furthermore, the banana socket is used for interchangeable connection of alligator clips, U-shaped cold-pressed terminals, or DuPont wire connectors.

[0011] Furthermore, the voltage acquisition module includes a main control unit and a battery monitoring chip that is communicatively connected to the main control unit. The main control unit communicates with the battery monitoring chip through an SPI interface.

[0012] Furthermore, the main control unit is an ARM Cortex-M core microcontroller, and the battery monitoring chip is an LTC6803 chip.

[0013] Furthermore, the voltage acquisition module is equipped with a touchscreen, which is electrically connected to the main control unit. Users can directly view data, start / stop acquisition, and perform balancing functions on-site without relying on host computer software, significantly improving operational convenience and the device's independent working capability.

[0014] Furthermore, the voltage acquisition module is also equipped with a CAN bus communication interface, which is a DB9 connector. This provides a standardized remote data interface, facilitating connection with external systems such as host computers and charging / discharging equipment for data recording and interaction.

[0015] Furthermore, the multiple relay control terminals of the relay matrix are connected to the main control unit of the voltage acquisition module, the common terminal of the relay is connected to the power supply of the equalization module, and the selection terminal of the relay is used to connect to a single cell of the battery module.

[0016] The above technical solution has the following advantages or technical effects:

[0017] 1. This utility model uses a universal adapter interface design with replaceable plugs, so one device can be adapted to a variety of battery modules with different models and interfaces, avoiding the need to repeatedly purchase special equipment or customize tooling.

[0018] 2. This utility model, through its fixed wiring sequence anti-misconnection interface unit design, completely avoids the risk of equipment damage caused by wiring errors, and reduces the operational threshold and reliance on personnel skills.

[0019] 3. This utility model features a modular and quick-connect design, making the system easy to carry and allowing for flexible combination according to testing needs, thus greatly shortening the experimental preparation time.

[0020] 4. This utility model, through an innovative equalization circuit structure combining a relay matrix and a single power supply, achieves active equalization while significantly reducing hardware costs and improving experimental efficiency and economy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the connection between the anti-misconnection interface unit and the adapter head of this utility model;

[0023] Figure 3 This is a flowchart of the process of this utility model. Detailed Implementation

[0024] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 As shown, a battery module voltage acquisition and equalization device includes: a voltage acquisition module and an equalization module with a split design.

[0026] The voltage acquisition module is equipped with an anti-misconnection interface unit, which includes a fixed-order pluggable terminal block for connecting the battery module according to a preset polarity sequence from battery negative to battery positive. As an optional embodiment, a PH2.0-16P type terminal block can be used, whose wiring sequence is permanently fixed during the PCB design stage, ensuring that polarity verification is not required during connection, realizing a "blind insertion" function, and fundamentally preventing misconnection.

[0027] like Figure 2 As shown, the anti-misconnection interface unit also includes a universal adapter interface, which is electrically connected to the pluggable terminal block assembly. As an optional embodiment, the universal adapter interface can use a standard 4mm banana plug for interchangeable connection of various adapters, including alligator clips, U-shaped cold-pressed terminals, or DuPont wire connectors, enabling the device to flexibly adapt to various physical interface forms of different battery modules.

[0028] The voltage acquisition module includes a main control unit and a battery monitoring chip that communicates with the main control unit. The main control unit communicates with the battery monitoring chip via an SPI interface. As an optional embodiment, the main control unit can be an ARM Cortex-M core microcontroller (such as an STM32F103C8T6), and the battery monitoring chip can be an LTC6803-4 multi-battery stack monitor chip. The PA5 (SCK), PA6 (MISO), PA7 (MOSI), and PA4 (CS) pins of the main control unit are respectively connected to the corresponding SPI interface pins of the LTC6803-4.

[0029] The voltage acquisition module also includes a touchscreen, which is electrically connected to the main control unit. As an optional embodiment, the touchscreen can be a 2.4-inch TFT resistive screen, connected to the main control unit via an FSMC interface, used to display battery voltage data and receive user control commands.

[0030] The voltage acquisition module is also equipped with a CAN bus communication interface. The CAN bus communication interface can use a DB9 connector. The CAN bus communication interface is internally connected to the CAN pins (PA11 (CAN_RX), PA12 (CAN_TX)) of the main control unit through a CAN transceiver (such as TJA1050) for data interaction with external devices.

[0031] The equalization module includes a power supply and a relay matrix. The power supply can be a 30V / 5A adjustable DC power supply, and the relay matrix consists of multiple single-channel relays (such as the Hongfa HFD4 / 5 series).

[0032] The control terminals of multiple relays in the relay matrix are connected to the main control unit of the voltage acquisition module. The common terminal of the relays is connected to the power supply of the equalization module. The selection terminal of the relays is used to connect to a single cell of the battery module. The coil control terminal of each relay is connected to the GPIO pin of the main control unit U1 to receive digital control.

[0033] The voltage acquisition module and the equalization module are separate structures. The voltage acquisition module and the equalization module are detachably connected by a quick-connect electrical connector. As an optional embodiment, the XT60 model aircraft plug can be used to ensure reliable connection and easy quick plugging and unplugging.

[0034] The voltage acquisition and equalization device supports the parallel use of multiple voltage acquisition modules. Each voltage acquisition module is identified and communicates through a different CAN ID. When expanding, the initial CAN ID of the subsequent module is set to the last 1 of the ID of the previous module plus 1.

[0035] During installation of the voltage acquisition and equalization device, the user should select the appropriate adapter (alligator clip, U-shaped cold-press terminal, or DuPont wire connector) according to the interface type of the battery module, and reliably connect the selected adapter to the corresponding terminal of the battery module. Perform necessary safety checks to confirm that all connections are correct. After confirmation, connect the anti-misconnection interface unit to the voltage acquisition module.

[0036] When using it, select the operation mode as needed. You can operate it directly through the touch screen to enable the voltage acquisition function and view the voltage of each cell in real time; or connect to the host computer through the CAN bus interface to record data and perform advanced operations.

[0037] like Figure 3 As shown, when battery balancing is required, the balancing module is connected to the voltage acquisition module via a quick-connect electrical connector. The balancing parameters are set via a touch screen or host computer. The system will automatically detect cells with abnormal voltage and control the corresponding relays to engage, so that the DC power supply can charge and balance the target cells.

[0038] As an optional application scenario, the test object is an 8-cell battery module of a certain model. The module terminals are bolted. The user selects a U-shaped cold-pressed terminal as the adapter, puts it on the module bolts and tightens it with a nut. After checking that the connection is correct, the adapter is plugged into the banana socket of the acquisition module to complete the physical connection.

[0039] Voltage acquisition is initiated via the touchscreen. After confirming the voltage differences among the cells, the equalization module is connected, and the equalization voltage threshold is set. The system automatically performs equalization operations on the cells with low voltage. After equalization is completed, a charge-discharge cycle test is performed. The entire process is safe and convenient.

[0040] This invention greatly improves the portability and deployment flexibility of the device through its split structure and quick-connect design; it adopts a fixed sequence of anti-misconnection interface units to fundamentally eliminate the risk of wiring errors; through a universal adapter interface design, one device can be adapted to multiple battery modules, making it highly versatile; it adopts a balancing scheme combining a relay matrix and a single power supply, which significantly reduces costs while ensuring balancing effect; and it provides dual operation modes of touch screen and CAN communication, taking into account both convenience and functionality.

[0041] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery module voltage acquisition and equalization device, characterized in that, include: The voltage acquisition module is equipped with an anti-misconnection interface unit, which includes a pluggable terminal block group arranged in a fixed order for connecting the battery module in a preset polarity order from battery negative to battery positive. Equalization module, the equalization module including power supply and relay matrix; The voltage acquisition module and the equalization module are separate units, and they are detachably connected to the ground via quick-connect electrical connectors.

2. The battery module voltage acquisition and equalization device according to claim 1, characterized in that, The anti-misconnection interface unit also includes a universal adapter interface, which is electrically connected to the plug-in terminal block. The universal adapter interface is a banana plug.

3. The battery module voltage acquisition and equalization device according to claim 2, characterized in that, The banana plug is used for interchangeable connection of alligator clips, U-shaped cold-pressed terminals, or DuPont wire connectors.

4. The battery module voltage acquisition and equalization device according to claim 1, characterized in that, The voltage acquisition module includes a main control unit and a battery monitoring chip that is communicatively connected to the main control unit. The main control unit communicates with the battery monitoring chip through an SPI interface.

5. The battery module voltage acquisition and equalization device according to claim 4, characterized in that, The main control unit is an ARM Cortex-M core microcontroller, and the battery monitoring chip is an LTC6803 chip.

6. The battery module voltage acquisition and equalization device according to claim 1, characterized in that, The voltage acquisition module is also equipped with a touch screen, which is electrically connected to the main control unit.

7. The battery module voltage acquisition and equalization device according to claim 1, characterized in that, The voltage acquisition module is also equipped with a CAN bus communication interface, which is a DB9 connector.

8. The battery module voltage acquisition and equalization device according to claim 1, characterized in that, The relay matrix has multiple relay control terminals connected to the main control unit of the voltage acquisition module, the common terminal of the relays connected to the power supply of the equalization module, and the selection terminal of the relays used to connect to a single cell of the battery module.

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