CN214225289U

CN214225289U - Tester for battery protection board

Info

Publication number: CN214225289U
Application number: CN202022919255.1U
Authority: CN
Inventors: 冯凯; 吴恒; 林佳才
Original assignee: Zhuhai Prishun Automation Technology Co ltd
Current assignee: Zhuhai Prishun Automation Technology Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-09-17
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses a battery protection shield tester, including the group battery, the power supply unit, acquisition unit and main control unit, the group battery is connected with first relay unit, the power supply unit includes alternating current-direct current converting circuit, charging circuit, irritate the current circuit, load circuit and main control power supply circuit, charging circuit, irritate current circuit and load circuit and all be connected with second relay unit, acquisition unit is connected with third relay unit, main control unit's first output is connected with second communication interface, main control unit's second output respectively with first relay unit, second relay unit and third relay unit are connected. The battery pack can support a plurality of batteries, has a wider voltage range and a wider charging voltage range, can meet the test requirements of battery protection boards of different models, and the power supply unit can provide different types of power supply currents for the battery protection boards, so that different states of the batteries are simulated, the use of real lithium batteries or electronic loads is avoided, and the test cost is favorably reduced.

Description

Tester for battery protection board

Technical Field

The utility model relates to a test equipment technical field, in particular to battery protection shield tester.

Background

The lithium battery is used as a novel energy source and is widely applied to products such as mobile phones, notebook computers, electric vehicles, small household appliances and the like. Because the material of lithium cell itself decides it can not overcharge, overdischarge, overflow, short circuit and ultra-high temperature charge-discharge, therefore the lithium cell generally can need to protect through lithium cell protection shield.

In order to ensure that the lithium battery protection board can play a role in protection, the lithium battery protection board needs to be detected in the production process. For this reason, it is necessary to design a multifunctional battery protection board tester.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery protection shield tester can have multiple test function and can reduce test cost.

According to the utility model discloses battery protection shield tester, including the group battery, be connected with first relay unit, and be suitable for through the first relay unit with the product connection that awaits measuring; the power supply unit comprises an alternating current-direct current conversion circuit, and a charging circuit, a current pouring circuit, a load circuit and a main control power supply circuit which are connected with the alternating current-direct current conversion circuit, wherein the charging circuit, the current pouring circuit and the load circuit are respectively connected with a second relay unit; the input end of the acquisition unit is connected with a third relay unit and is suitable for being connected with the product to be detected through the third relay unit; the main control unit is provided with an input end, a first output end and a second output end, the input end of the main control unit is connected with the output end of the acquisition unit, the first output end of the main control unit is connected with a second communication interface, and the second output end of the main control unit is respectively connected with the control end of the first relay unit, the control end of the second relay unit and the control end of the third relay unit.

According to the utility model discloses battery protection shield tester has following beneficial effect at least:

the utility model discloses multisection battery can be supported to the group battery, has the voltage range and the charging voltage scope of broad, can satisfy the test requirement without model battery protection shield, and power supply unit includes charging circuit, irritates current circuit and load circuit, can provide the supply current of different grade type for the battery protection shield that awaits measuring to the different states of simulation battery avoid using real lithium cell or electronic load, are favorable to reducing test cost.

According to some embodiments of the present invention, the battery pack includes 1 ~ 10 lithium batteries connected in series.

According to some embodiments of the present invention, the voltage of the battery pack is less than or equal to 50V, and the charging voltage of the battery pack is 0-60V.

According to some embodiments of the invention, the external load comprises a constant voltage type electronic load and a constant current type electronic load.

According to some embodiments of the present invention, the main control unit is further connected to an expansion interface, and is adapted to be connected to an external function expansion module through the expansion interface.

According to some embodiments of the present invention, the function extension module includes at least one of a simulation battery cell module, a current module and a charging module.

According to some embodiments of the present invention, the first communication interface includes at least one of an I2C interface, an SMBus interface, a UART interface, an OneWire interface, and a CAN communication interface.

Additional aspects and advantages of the invention 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 the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic block diagram of a battery protection board tester according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, the present embodiment discloses a battery protection board tester, including a battery pack 100, a power supply unit 200, an acquisition unit 300 and a main control unit 400, where the battery pack 100 is connected to a first relay unit 110 and is suitable for being connected to a product to be tested through the first relay unit 110, the battery pack 100 can support multiple batteries, has a wider voltage range and a wider charging voltage range, and can meet testing requirements of lithium batteries and battery protection boards of different models.

The power supply unit 200 includes an ac-dc conversion circuit 210, and a charging circuit 220, a current pouring circuit 230, a load circuit 240 and a main control power supply circuit connected to the ac-dc conversion circuit 210, the ac-dc conversion circuit 210 is used for converting the commercial power into direct current, the output voltage is 12V, the charging circuit 220, the current pouring circuit 230 and the load circuit 240 are all connected to a second relay unit 250, the charging circuit 220 and the current pouring circuit 230 are suitable for being connected to a first communication interface through the second relay unit 250, and the first communication interface is suitable for being connected to a product to be tested. Wherein, charging circuit 220 is used for providing charging voltage for the product that awaits measuring and group battery 100 to the operating condition of simulation lithium cell when charging, and then whether the corresponding function of detecting the product that awaits measuring is normal, irritate current circuit 230 and be used for providing the electric current of irritating for the product that awaits measuring and group battery 100, thereby the operating condition of simulation lithium cell under the electric current state of irritating, and then whether the corresponding function of detecting the product that awaits measuring is normal, master control supply circuit is used for providing operating voltage for the main control unit. The load circuit 240 is suitable for being connected with a load interface through the second relay unit 250, the load interface is connected with a product to be tested through an external load, the external load comprises a constant voltage type electronic load and a constant current type electronic load, the external load is used for simulating the working state of the lithium battery during discharging, so as to detect whether the corresponding function of the product to be tested is normal or not, the input end of the acquisition unit 300 is connected with the third relay unit 310 and is suitable for being connected with the product to be tested through the third relay unit 310, and the acquisition unit 300 is used for acquiring the corresponding parameters of the product to be tested under different test items and sending the parameters to the main control unit 400. The acquisition unit 300 may have a conventional circuit structure such as a voltage sampling circuit or a current sampling circuit.

The main control unit 400 is provided with an input end, a first output end and a second output end, the input end of the main control unit 400 is connected with the output end of the acquisition unit 300, the first output end of the main control unit 400 is connected with a second communication interface, the second communication interface is suitable for being in communication connection with an external upper computer, products to be tested can be in accordance with different models, the main control unit 400 is adjusted in test parameters through the upper computer, the second output end of the main control unit 400 is respectively connected with the control end of the first relay unit 110, the control end of the second relay unit 250 is connected with the control end of the third relay unit 310, the main control unit 400 is controlled to carry out on-off control on different circuits of the power supply unit 200 through the first relay unit 110, the second relay unit 250 and the third relay unit 310, and therefore detection of corresponding items is carried out on the products to be tested.

It should be noted that, in this embodiment, the main control unit 400 may adopt a single chip, a DSP or a CPLD and other devices having a logic processing function, the charging circuit 220, the current-sinking circuit 230, the load circuit 240 and the main control power supply circuit may all adopt existing circuit structures, and in this embodiment, different circuits in the power supply unit 200 are integrated on the same PCB, so that an integrated design of the circuits can be realized, and diversity of test functions of products to be tested can be realized.

In the above embodiment, the battery pack 100 includes 1 to 10 lithium batteries connected in series, the voltage of the battery pack 100 is less than or equal to 50V, the charging voltage of the battery pack 100 is 0 to 60V, and various types of lithium batteries or electronic loads can be simulated, so that the test requirements of products to be tested of different types are met.

The main control unit 400 is further connected with an expansion interface, and is adapted to be connected with an external function expansion module through the expansion interface, and the function expansion module includes at least one of a simulation battery cell module, a current module, and a charging module for charging, and can support expansion of more functions, thereby satisfying different test requirements. In this embodiment, the expansion interface includes an expansion chip of a model CAT9555 series, so that a plurality of sets of expansion chips of the model can be used to connect the function expansion module. It should be noted that the function expansion module may adopt an existing circuit module, or may adopt a customized circuit module.

In the above embodiment, the first communication interface includes at least one of an I2C interface, an SMBus interface, a UART interface, an OneWire interface, and a CAN communication interface, and CAN support multiple communication protocol interfaces to meet communication requirements of different products to be tested.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A battery protection plate tester, comprising:

the battery pack (100) is connected with a first relay unit (110) and is suitable for being connected with a product to be tested through the first relay unit (110);

the power supply unit (200) comprises an alternating current-direct current conversion circuit (210), and a charging circuit (220), a current-filling circuit (230), a load circuit (240) and a main control power supply circuit which are connected with the alternating current-direct current conversion circuit (210), wherein the charging circuit (220), the current-filling circuit (230) and the load circuit (240) are all connected with a second relay unit (250), the charging circuit (220) and the current-filling circuit (230) are suitable for being connected with a first communication interface through the second relay unit (250), the first communication interface is suitable for being connected with a product to be tested, the load circuit (240) is suitable for being connected with a load interface through the second relay unit (250), and the load interface is connected with the product to be tested through an external load;

the input end of the acquisition unit (300) is connected with a third relay unit (310) and is suitable for being connected with the product to be tested through the third relay unit (310);

the main control unit (400) is provided with an input end, a first output end and a second output end, the input end of the main control unit (400) is connected with the output end of the acquisition unit (300), the first output end of the main control unit (400) is connected with a second communication interface, and the second output end of the main control unit (400) is connected with the control end of the first relay unit (110), the control end of the second relay unit (250) and the control end of the third relay unit (310) respectively.

2. The battery protection plate tester according to claim 1, wherein the battery pack (100) comprises 1-10 lithium batteries connected in series.

3. The battery protection plate tester according to claim 1 or 2, wherein the voltage of the battery pack (100) is less than or equal to 50V, and the charging voltage of the battery pack (100) is 0-60V.

4. The battery protection panel tester of claim 1, wherein the external load comprises a constant voltage type electronic load and a constant current type electronic load.

5. The battery protection board tester according to claim 1, wherein the main control unit (400) is further connected with an expansion interface and is adapted to be connected with an external function expansion module through the expansion interface.

6. The battery protection panel tester of claim 5, wherein the function expanding module comprises at least one of an analog cell module, a current module, and a full charge module.

7. The battery protection plate tester of claim 1, wherein the first communication interface comprises at least one of an I2C interface, an SMBus interface, a UART interface, an OneWire interface, and a CAN communication interface.