Multi-channel programmable battery short circuit testing device

Abstract

The utility model relates to the technical field of battery testing, and discloses a multi-channel programmable battery short circuit testing device, which comprises an environment box, an acquisition module and a monitoring terminal, a test bench and a thermal imager are arranged in the environment box, the test bench is used for installing a battery to be tested, the thermal imager is opposite to the battery to be tested on the test bench, and the acquisition module is connected with the monitoring terminal. Obtaining an internal temperature field of the to-be-measured battery; the acquisition module comprises a voltage and temperature sampling circuit, a current sampling circuit and a pressure sampling circuit, the voltage and temperature sampling circuit and the current sampling circuit are electrically connected with the to-be-tested battery respectively, the pressure sampling circuit is connected with a pressure sensor, and the pressure sensor is installed on a pressure release valve of the to-be-tested battery; the monitoring terminal is electrically connected with the voltage and temperature sampling circuit, the current sampling circuit, the pressure sampling circuit and the thermal imager. Data such as voltage, surface temperature and current of the to-be-tested battery can be detected, temperature distribution and pressure change in the battery can be monitored in real time, and the purpose of comprehensively and accurately testing the short-circuit process of the battery is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a multi-channel programmable battery short-circuit testing device. Background Art

[0002] With the development of lithium battery technology, its energy density has been greatly improved. Once a short circuit occurs, the battery will release a huge amount of energy in an instant, which is prone to high temperature, valve opening, and even fire and explosion. In order to accurately evaluate the safety performance of the battery, it is necessary to test and simulate the battery's short circuit tolerance.

[0003] For example, the Chinese invention patent application with application publication number CN105259514A and application publication date 2016.01.20 discloses a battery cell short-circuit test device and method, which specifically includes a battery cell mounting fixture, a voltage and temperature collector, a shunt and a relay; the battery cell is installed on the battery cell mounting fixture, and the battery cell, the shunt and the relay are connected in series to form a loop through a series wire; the two voltage test wires of the voltage and temperature collector are respectively connected to the positive and negative poles of the battery cell; the temperature test wire of the voltage and temperature collector is connected to the temperature sensor arranged on the surface of the battery cell; the two shunt test wires of the voltage and temperature collector are connected to the two voltage collection terminals of the shunt; the relay is connected to the relay DC power supply through the relay wire, and the relay control switch is connected in series to the relay wire.

[0004] Existing battery cell short-circuit test devices can record the temperature changes, current changes and voltage changes of battery cells. However, by only measuring the surface temperature of the short-circuited battery, it is difficult to monitor the temperature and pressure changes inside the battery, and it is impossible to achieve the purpose of comprehensively and accurately testing the battery short-circuit process. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing testing device only measures the surface temperature of the short-circuited battery, and it is difficult to monitor the temperature and pressure changes inside the battery, and cannot achieve the purpose of comprehensively and accurately testing the short-circuit process of the battery.

[0006] In order to solve the above technical problems, the utility model provides a multi-channel programmable battery short circuit test device, comprising:

[0007] An environmental box, wherein a test bench and a thermal imager are provided in the environmental box, wherein the test bench is used to install a battery to be tested, and the thermal imager is arranged opposite to the battery to be tested on the test bench to obtain an internal temperature field of the battery to be tested;

[0008] An acquisition module, the acquisition module comprising a voltage and temperature sampling circuit, a current sampling circuit, and a pressure sampling circuit, the voltage and temperature sampling circuit and the current sampling circuit are electrically connected to the battery to be tested, respectively, the pressure sampling circuit is connected to a pressure sensor, and the pressure sensor is installed on the pressure relief valve of the battery to be tested;

[0009] A monitoring terminal is electrically connected to the voltage and temperature sampling circuit, the current sampling circuit, the pressure sampling circuit, and the thermal imager respectively.

[0010] Furthermore, the monitoring terminal includes a main control board, a power harness is connected between the main control board and the battery to be tested, and a sampling harness is connected between the acquisition module and the battery to be tested.

[0011] Furthermore, the acquisition module also includes a data acquisition instrument, and the data acquisition instrument is electrically connected to the voltage and temperature sampling circuit, the current sampling circuit, and the pressure sampling circuit respectively.

[0012] Furthermore, the acquisition module also includes an IC chip, and the IC chip is electrically connected between the data acquisition instrument and the main control board.

[0013] Furthermore, the current sampling circuit is also provided with a Hall sensor, and the Hall sensor is electrically connected to the power harness.

[0014] Furthermore, a discharge module is also provided on the main control board, and the discharge module is electrically connected to the power harness.

[0015] Furthermore, the thermal imager is an infrared thermal imager.

[0016] Furthermore, the environmental chamber is a temperature-controlled environmental chamber.

[0017] Furthermore, a CT scanner is also provided in the environmental chamber. The CT scanner is arranged opposite to the battery to be tested on the test bench, and the CT scanner is electrically connected to the monitoring terminal.

[0018] Furthermore, the projection outline of the test bench is a rectangle, the test bench has a long side and a wide side, the thermal imager is arranged at an interval with the long side of the test bench, and the CT scanner is arranged at an interval with the wide side of the test bench.

[0019] Compared with the prior art, the multi-channel programmable battery short-circuit test device of the utility model has the following beneficial effects: the multi-channel programmable battery short-circuit test device adopts the design form of an environmental chamber, an acquisition module and a monitoring terminal. The environmental chamber is provided with a test bench and a thermal imager. The test bench is used to place and fix the battery to be tested. The environmental chamber provides a closed space with a constant temperature for the battery to be tested, and can create environmental conditions of different temperatures to ensure that the surface temperature of the battery to be tested is in a balanced state during the test. Moreover, the environmental chamber can play a protective role to prevent the battery to be tested from catching fire and exploding during the short-circuit test, thereby causing a greater danger. Since the thermal imager is arranged relative to the battery to be tested on the test bench, the temperature distribution of each part of the battery to be tested can be obtained in real time, so that the internal temperature field of the battery to be tested during the test can be monitored and recorded.

[0020] Among them, the acquisition module includes a voltage and temperature sampling circuit, a current sampling circuit, and a pressure sampling circuit. The voltage and temperature sampling circuit is used to detect the real-time voltage and temperature when the battery to be tested is short-circuited. The current sampling circuit is used to detect the real-time current when the battery to be tested is short-circuited. The pressure sampling circuit and the pressure sensor can detect the pressure data at the pressure relief valve of the battery to be tested, thereby obtaining the maximum pressure when the battery cell opens the valve, so as to verify whether the research and development design of the battery to be tested is reasonable.

[0021] In addition, the monitoring terminal is electrically connected to the voltage and temperature sampling circuit, the current sampling circuit, the pressure sampling circuit, and the thermal imager. The voltage, surface temperature, current, and pressure data detected by the acquisition module and the temperature distribution data monitored by the thermal imager can be transmitted to the monitoring terminal. The monitoring terminal can be used to directly and accurately observe the dynamic changes of various parameters of the battery under test during the test. The multi-channel programmable battery short-circuit test device can not only detect the voltage, surface temperature, and current data of the battery under test, but also monitor the temperature distribution and pressure changes inside the battery in real time, thereby achieving the purpose of comprehensively and accurately testing the battery short-circuit process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view schematic diagram of a multi-channel programmable battery short circuit test device in an embodiment of the utility model;

[0023] Figure 2 It is a signal acquisition principle diagram of a multi-channel programmable battery short circuit test device in an embodiment of the utility model;

[0024] In the figure: 1-environmental chamber, 10-battery to be tested, 11-test bench, 111-long side, 112-wide side, 12-thermal imager, 13-CT scanner, 2-acquisition module, 20-sampling harness, 3-monitoring terminal, 30-power harness. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 , Figure 2 As shown, a multi-channel programmable battery short-circuit test device of an embodiment of the utility model includes an environmental chamber 1, an acquisition module 2, and a monitoring terminal 3. A test bench 11 and a thermal imager 12 are provided in the environmental chamber 1. The test bench 11 is used to install a battery to be tested 10. The thermal imager 12 is arranged opposite to the battery to be tested 10 on the test bench 11 to obtain the internal temperature field of the battery to be tested 10.

[0030] The acquisition module 2 includes a voltage and temperature sampling circuit, a current sampling circuit, and a pressure sampling circuit. The voltage and temperature sampling circuit and the current sampling circuit are electrically connected to the battery to be tested 10 respectively. The pressure sampling circuit is connected to a pressure sensor, and the pressure sensor is installed on the pressure relief valve of the battery to be tested 10; the monitoring terminal 3 is electrically connected to the voltage and temperature sampling circuit, the current sampling circuit, the pressure sampling circuit, and the thermal imager 12 respectively.

[0031] The multi-channel programmable battery short-circuit test device adopts the design form of an environmental chamber 1, an acquisition module 2 and a monitoring terminal 3. A test bench 11 and a thermal imager 12 are provided in the environmental chamber 1. The test bench 11 is used to place and fix the battery 10 to be tested. The environmental chamber 1 provides a closed space with a constant temperature for the battery 10 to be tested, and can create environmental conditions of different temperatures to ensure that the surface temperature of the battery 10 to be tested is in a balanced state during the test. Moreover, the environmental chamber 1 can play a protective role, avoiding the battery 10 to be tested from catching fire and exploding during the short-circuit test, which may cause a greater danger. Since the thermal imager 12 is arranged relative to the battery 10 to be tested on the test bench 11, the temperature distribution of each part of the battery 10 to be tested can be obtained in real time, so that the internal temperature field of the battery 10 to be tested during the test can be monitored and recorded.

[0032] Among them, the acquisition module 2 includes a voltage and temperature sampling circuit, a current sampling circuit, and a pressure sampling circuit. The voltage and temperature sampling circuit is used to detect the real-time voltage and temperature when the battery 10 to be tested is short-circuited. The current sampling circuit is used to detect the real-time current when the battery 10 to be tested is short-circuited. The pressure sampling circuit and the pressure sensor can detect the pressure data at the pressure relief valve of the battery 10 to be tested, thereby obtaining the maximum pressure when the battery cell opens the valve, so as to verify whether the research and development design of the battery 10 to be tested is reasonable.

[0033] In addition, the monitoring terminal 3 is electrically connected to the voltage and temperature sampling circuit, the current sampling circuit, the pressure sampling circuit, and the thermal imager 12 respectively. The voltage, surface temperature, current, and pressure data detected by the acquisition module 2 and the temperature distribution data monitored by the thermal imager 12 can be transmitted to the monitoring terminal 3. The monitoring terminal 3 can be used to intuitively and accurately observe the dynamic changes of various parameters of the battery 10 under test during the test. The multi-channel programmable battery short-circuit test device can not only detect the voltage, surface temperature, and current data of the battery 10 under test, but also monitor the temperature distribution and pressure changes inside the battery in real time, thereby achieving the purpose of comprehensively and accurately testing the battery short-circuit process.

[0034] In this embodiment, the monitoring terminal 3 includes a main control board, a power harness 30 is connected between the main control board and the battery to be tested 10, and a sampling harness 20 is connected between the acquisition module 2 and the battery to be tested 10. In addition, the acquisition module 2 also includes a data acquisition instrument, such as Figure 2As shown, the data acquisition instrument is electrically connected to the voltage and temperature sampling circuit, the current sampling circuit, and the pressure sampling circuit respectively. The acquisition module 2 also includes an IC chip, which is electrically connected between the data acquisition instrument and the main control board.

[0035] Specifically, the model of the temperature collector is LR8450-H IOKI. Since the acquisition module 2 integrates the temperature collector, it can collect voltage and temperature data, and the voltage and temperature data are sent to the main control board of the monitoring terminal 3 through the IC chip. The dynamic process of the short-circuit test of the battery 10 to be tested can be intuitively seen through the display interface of the monitoring terminal 3. Correspondingly, the current sampling circuit is also provided with a Hall sensor, which is electrically connected to the power harness 30. The Hall sensor is used to detect the current passing through the power harness 30, and the detected circuit data is transmitted to the main control board of the monitoring terminal 3 in real time, so as to observe the dynamic process of the current during the short-circuit test.

[0036] As a further preferred solution, a discharge module is also provided on the main control board, and the discharge module is electrically connected to the power harness 30. The discharge parameters can be set by the built-in program of the monitoring terminal 3, and the dynamic short-circuit discharge test can be realized by changing the discharge conditions, such as resistance, current or power, during the test; or, different discharge conditions can be set at different time periods, and the short-circuit conditions of the battery 10 to be tested can also be dynamically controlled according to the voltage, temperature and current data obtained by the acquisition module 2, and the test conditions under different ambient temperatures can be simulated in conjunction with the environmental box 1. Specifically, the thermal imager 12 is an infrared thermal imager, and its model is Fluke T iX885, which can monitor and record the temperature distribution of various parts of the battery 10 to be tested in real time during the test, and transmit the temperature field image to the monitoring terminal 3. The environmental box 1 is a temperature-controlled environmental box, which can produce test conditions of corresponding ambient temperature for the battery 10 to be tested.

[0037] In addition, a CT scanner 13 is also provided in the environmental chamber 1. The CT scanner 13 is arranged relative to the battery 10 to be tested on the test bench 11. The CT scanner 13 is electrically connected to the monitoring terminal 3. The expansion and fracture of the internal winding core of the battery 10 to be tested can be obtained in real time by using the CT scanner 13. By observing the internal structural changes during the short-circuit test, possible risks can be effectively prevented, which is convenient for formulating subsequent improvement measures. The projection profile of the test bench 11 is rectangular. The test bench 11 has a long side 111 and a wide side 112. The thermal imager 12 is arranged at intervals from the long side 111 of the test bench 11, and the CT scanner 13 is arranged at intervals from the wide side 112 of the test bench 11. The internal space of the environmental chamber 1 is fully utilized to avoid interference between the thermal imager 12 and the CT scanner 13.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A multi-channel programmable battery short circuit test device, characterized in that: include: An environmental box (1), wherein a test bench (11) and a thermal imager (12) are arranged in the environmental box (1), the test bench (11) being used to install a battery to be tested (10), and the thermal imager (12) being arranged opposite to the battery to be tested (10) on the test bench (11) so as to obtain an internal temperature field of the battery to be tested (10); A collection module (2), the collection module (2) comprising a voltage and temperature sampling circuit, a current sampling circuit, and a pressure sampling circuit, the voltage and temperature sampling circuit and the current sampling circuit being electrically connected to the battery to be tested (10) respectively, the pressure sampling circuit being connected to a pressure sensor, and the pressure sensor being mounted on a pressure relief valve of the battery to be tested (10); A monitoring terminal (3), wherein the monitoring terminal (3) is electrically connected to the voltage and temperature sampling circuit, the current sampling circuit, the pressure sampling circuit, and the thermal imager (12) respectively.

2. The multi-channel programmable battery short circuit test device according to claim 1, characterized in that: The monitoring terminal (3) comprises a main control board, a power harness (30) is connected between the main control board and the battery to be tested (10), and a sampling harness (20) is connected between the acquisition module (2) and the battery to be tested (10).

3. The multi-channel programmable battery short circuit test device according to claim 2, characterized in that: The acquisition module (2) also includes a data acquisition instrument, which is electrically connected to the voltage and temperature sampling circuit, the current sampling circuit, and the pressure sampling circuit respectively.

4. The multi-channel programmable battery short circuit test device according to claim 3 is characterized in that: The acquisition module (2) also includes an IC chip, and the IC chip is electrically connected between the data acquisition instrument and the main control board.

5. The multi-channel programmable battery short circuit test device according to claim 2, characterized in that: The current sampling circuit is also provided with a Hall sensor, and the Hall sensor is electrically connected to the power harness (30).

6. The multi-channel programmable battery short circuit test device according to claim 2, characterized in that: The main control board is also provided with a discharge module, and the discharge module is electrically connected to the power harness (30).

7. The multi-channel programmable battery short circuit test device according to claim 1, characterized in that: The thermal imager (12) is an infrared thermal imager.

8. The multi-channel programmable battery short circuit test device according to claim 1, characterized in that: The environmental chamber (1) is a temperature-controlled environmental chamber.

9. The multi-channel programmable battery short circuit test device according to claim 1, characterized in that: The environmental chamber (1) is also provided with a CT scanner (13), the CT scanner (13) being arranged opposite to the battery to be tested (10) on the test bench (11), and the CT scanner (13) being electrically connected to the monitoring terminal (3).

10. The multi-channel programmable battery short circuit test device according to claim 9, characterized in that: The projected outline of the test bench (11) is a rectangle; the test bench (11) has a long side (111) and a wide side (112); the thermal imager (12) is arranged at intervals from the long side (111) of the test bench (11); and the CT scanner (13) is arranged at intervals from the wide side (112) of the test bench (11).

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