Battery combustion test model

Abstract

The invention provides a battery combustion test model, which comprises a test shell, a test element and a heating device, and is characterized in that the heating device comprises a plurality of heating plates and an electric control module for controlling the plurality of heating plates; under the control of the electric control module, the heating plate executes the following steps to test a test element: obtaining test data when the test element is tested by the heating device, the test data including element data and operation data, the element data at least comprise temperature, target gas concentration and element shape; generating an operation matrix based on the operation data, and determining a target topology from preset test topologies according to the test data; generating an operation sequence according to the target topology and the operation matrix; and controlling the heating device to heat the test element through the operation sequence.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery combustion testing, in particular to a battery combustion testing model. BACKGROUND

[0002] The lithium ion battery PACK, also known as a battery module, is a manufacturing process of lithium ion batteries, which means packaging, encapsulation and assembly. It refers to connecting multiple lithium ion single cell groups in parallel and series connection mode, and considering system mechanical strength, thermal management, BMS matching and other problems. In the case of thermal runaway of lithium batteries, multiple complex chemical and physical reactions occur inside the battery. A large amount of heat and gas released by thermal runaway triggers a domino effect, causing other batteries to also experience thermal runaway, forming a thermal runaway fire spread in the energy storage system. The research on thermal runaway behavior and fire spread characteristics can not only test the qualification of the energy storage system battery and design to reduce safety risks, but also master the thermal runaway fire spread characteristics. The battery combustion testing model is used to test the characteristics of battery combustion. In the case of battery combustion, the traditional battery combustion testing model can only perform battery evaluation at a single point. In particular, in the lithium ion battery PACK group, due to the arrangement of multiple lithium batteries, in reality, thermal runaway of the battery occurs randomly. Therefore, it is urgent to detect the thermal runaway of lithium ion batteries at different positions. SUMMARY

[0003] The embodiment of the application provides a battery combustion testing model to at least solve the problem of difficulty in detecting thermal runaway of lithium ion batteries at different positions in the related art.

[0004] According to one embodiment of the application, a battery combustion testing model is provided, which comprises a test shell, a test element and a heating device. The test element comprises a plurality of heating plates and an electric control module for controlling the plurality of heating plates. The heating plate (3) performs the following steps under the control of the electric control module to realize the test of the test element: Obtain test data when the heating device tests the test element, wherein the test data comprises element data and operation data, and the element data at least comprises temperature, target gas concentration and element shape; Generate an operation matrix based on the operation data, and determine a target topology from a preset test topology according to the test data; Generate an operation sequence according to the target topology and the operation matrix; Control the heating device to heat the test element through the operation sequence.

[0005] Further, the electric control module comprises: The application discloses a control board for controlling at least one heating plate and a control circuit for transmitting control signals of the control board to the heating plate and working the heating plate.

[0006] Further, the control board comprises first switch buttons for controlling the working of the heating plates, and the first switch buttons are in one-to-one correspondence with the heating plates.

[0007] Further, when the first switch button is pressed, the pressed first switch button performs a first color changing operation.

[0008] Further, when the first switch button is pressed and a second switch button is pressed, the pressed first switch button performs a second color changing operation, and the second switch button is used for controlling power supply to the heating plate.

[0009] Further, the control board comprises a switch remote controller and buttons arranged on the switch remote controller, a plurality of the buttons are arranged on the switch remote controller, a plurality of switches in parallel are arranged below the buttons, a general switch connected with a power supply and a switch control board circuit is arranged on the second switch button, and each switch is connected to a corresponding heating plate.

[0010] Further, the control board comprises a control display terminal for remotely operating the heating plate and outputting control instructions, the control circuit comprises a first wireless module for transmitting the control instructions sent by the control board, a second wireless module for receiving the control instructions sent by the first wireless module, and a processing module for processing the control instructions and controlling the designated heating plate to perform a heating action.

[0011] According to the application, a heater is arranged at a corresponding position of each battery module, so that the heating position can be changed, the starting point of thermal runaway can be replaced, and the battery cell can be arranged at a designated position, the remaining positions are arranged with the dummy, when the multi-point combustion test is needed, the button corresponding to the multi-point test position is pressed on the control board, then the battery cell is arranged at the corresponding position of the test shell, the first switch button is pressed to change the color before the test, the personnel can be indicated to arrange the battery cell at the correct position, the second button is started to complete the heating of the heating plate, the accuracy is higher, and the color is changed again after the heating, so that the test of the position which has been tested can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings: Figure 1 FIG. 1 is a schematic diagram of the overall structure of the embodiment 1 of the application; Figure 2Fig. 1 is a schematic diagram of a position of a heating plate according to an embodiment of the present application; Figure 3 Fig. 2 is a schematic diagram of a side plate according to an embodiment of the present application; Figure 4 Fig. 3 is a schematic diagram of another side plate according to an embodiment of the present application; Figure 5 Fig. 4 is a schematic diagram of a thermocouple wire according to an embodiment of the present application; Figure 6 Fig. 5 is a schematic diagram of a switch remote controller according to an embodiment of the present application; Figure 7 Fig. 6 is a schematic diagram of a structure according to an embodiment of the present application; Figure 8 Fig. 7 is a schematic diagram of a circuit according to an embodiment of the present application. In the figure, 1 is a test housing; 11 is a side plate; 12 is a back plate; 13 is a fire extinguishing nozzle port; 14 is a thermocouple wire inlet; 15 is a thermocouple wire; 16 is a gas analyzer collection port; 17 is an aviation plug heating plate wire; 18 is an exhaust valve; 2 is a test element; 3 is a heating plate; 41 is a switch remote controller; 42 is a first switch button; 43 is a second switch button; 5 is a control display terminal; 6 is a first wireless module; 7 is a second wireless module; 8 is a processing module. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0014] Embodiment 1: a battery combustion test model, referring to Figures 1-5As shown, the device includes a test housing 1, a test element 2, and a heating device. The test housing 1 includes four side plates 11 and a back plate 12. A fire extinguishing nozzle 13 is located on one side plate 11 inside the housing, along with a thermocouple inlet 14. Thermocouples 15 are used to measure the temperature changes at various locations during thermal runaway of the battery cell, forming a curve. In this embodiment, the thermocouples 15 are configured with an S-shaped loop to ensure multi-point temperature measurement and more accurate data. An exhaust valve 18 is also provided for venting gas. The board is equipped with a gas analyzer sampling port 16 for gas analysis during thermal runaway, and an aviation plug heating plate wire 17. Inside the housing, there are battery cells and dummy cells. The dummy cells are used for ignition, and the dummy cells are used to simulate the combustion process of the battery cells. On the back plate 12 inside the housing, there are several heating plates 3. In this embodiment, the number of heating plates 3 is the same as the number of battery cells and dummy cells, and the arrangement is such that each heating plate 3 corresponds to one battery cell or dummy cell, and each battery cell or dummy cell is provided with one heating plate 3. The heating plates 3 are used to heat the battery cells to simulate the thermal runaway of the battery cells.

[0015] Specifically, the heating plate (3), under the control of the electronic control module, performs the following steps to test the test component: Step S1: Obtain test data when the heating device tests the test element, wherein the test data includes element data and operation data, and the element data includes at least temperature, target gas concentration, and element shape; Since the shape, temperature and gases produced by the components are different when the battery is burned to different states, the combustion state of the battery can be determined by detecting data such as the shape and temperature of its components, and the subsequent heating action can be determined based on the combustion state.

[0016] Temperature data is obtained through infrared or thermocouple detection, gas concentration (such as CO, VOC, etc.) is obtained through gas sensors, component shape is obtained through laser profilometer or visual recognition, and operation data is obtained by retrieving operation logs.

[0017] Step S2: Generate an operation matrix based on the operation data, and determine the target topology from the preset test topology according to the test data; The operation data is constructed into an operation matrix according to preset rules. For example, the operation matrix M is constructed with the test phase as the rows and the operation parameters as the columns. Meanwhile, each topology in the topology library is assigned a set of input conditions (temperature threshold, gas concentration, shape tolerance). Then, the current test data is matched with the input conditions of the topology nodes, and the topology with the highest matching degree is selected as the target topology. The reason for introducing topology data here is to automatically generate an executable operation sequence based on the topology structure, so as to realize the programmability, reproducibility and controllability of the test process, thereby improving the accuracy of battery combustion detection.

[0018] Step S3: Generate an operation sequence based on the target topology and the operation matrix; After determining the topology conditions and the operation matrix, the operation matrix M is mapped to each node in the target topology, and control commands are generated in topological order, for example: Phase 1: Increase the temperature to the target temperature at a rate of 5℃ / s; Phase 2: Stabilize the temperature for 120 seconds and inject the target gas; Phase 3: Natural cooling and gas exhaust.

[0019] Step S4: Control the heating device to heat the test element through the operation sequence.

[0020] The heating plate executes multiple temperature control curves according to the operation sequence and provides real-time data feedback for topology selection in the next stage.

[0021] Among them, reference Figure 6 As shown, the aforementioned electronic control module includes a control board and a control circuit. The control board is used to control one or more heating plates 3 to operate, and the control circuit is used to transmit the control signals from the control board to the heating plates 3 to make them operate. In this embodiment, the control board is configured as a switch remote controller 41. The controller has two types of buttons. The first type of button is a square button used to control a heating plate 3 to perform a heating action, and is named the first switch button 42 in this embodiment. The second type of button is a round button, and is named the second switch button 43 in this embodiment. The arrangement of the first switch buttons 42 is the same as the arrangement of the heating plates 3, and each first switch button 42 corresponds to a heating plate 3 at a corresponding position. Under each of the multiple first switch buttons 42 are multiple switches connected in parallel. The first switch button 42 is the main control switch connected to the power supply. When the first switch button 42 is pressed, the action of pressing the second switch button 43 is completed, and the heating plate 3 corresponding to the first switch button 42 starts to operate.

[0022] A color indicator light is also provided below the first switch button 42. In this embodiment, the indicator lights are set to green and red respectively. When the first switch button 42 is pressed, the first switch button 42 performs a first color change operation, that is, the green indicator light turns on. When the first switch button 42 is pressed and the second switch button 43 is pressed, the first switch button performs a second color change operation, that is, the green indicator light turns off and the red indicator light turns on. The above-mentioned red indicator light turning on and the above-mentioned green indicator light turning on can ensure that when the first switch button 42 is pressed, it reminds the operator of the placement position of the battery cell, preventing the battery cell and dummy from being placed in the wrong position, which would lead to test failure. The process of the green indicator light turning off and the red indicator light turning on can remind the operator that the thermal runaway of the corresponding battery cell has been tested when multiple tests are conducted, preventing the situation of repeated testing.

[0023] By placing a heater at the corresponding position of each battery module, the heating position can be changed. If the thermal runaway initiation point needs to be changed, only the battery cell needs to be placed at the designated position, and dummy cells are placed at the other positions. When multi-point combustion test is required, simply press the button corresponding to the multi-point test position on the control panel, and then place the battery cell at the corresponding position on the test housing 1. At the same time, before the test, pressing the first switch button 42 changes color, which can indicate to the personnel to place the battery cell in the correct position. Then, the second button is activated to complete the heating of the heating plate 3, ensuring higher accuracy. At the same time, the secondary color change after heating can prevent repeated testing of the already tested position.

[0024] Example 2: The difference from Example 1 is that, referring to... Figures 7-8 As shown, the control board includes a control display terminal 5 for remotely operating the heating plate 3 and outputting control commands. In this embodiment, the control display terminal 5 is set as a flat panel display, but it can also be set as a control terminal such as a mobile phone or computer. The first switch button 42 and the second switch button 43 are virtual buttons that are simulated on the terminal. The virtual buttons also have the functions of a first color-changing operation and a second color-changing operation. When the virtual first switch button 42 is pressed, the virtual first switch button 42 on the terminal turns green. When the virtual second switch button 43 is pressed, the virtual first switch button 42 on the terminal turns red. The control circuit includes a first wireless module 6 for sending control commands issued by the control board, a second wireless module 7 for receiving control commands issued by the first wireless module 6, and a processing module 8 for processing control commands and controlling the designated heating plate 3 to perform heating actions. The terminal records the data of the first switch button 42. When the second switch button 43 is pressed, it is sent to the second wireless module 7 through the first wireless module 6. The second wireless module 7 receives the command and processes it through the processing module 8 to control the corresponding heating plate 3 to heat up.

[0025] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0026] The terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit the invention. The singular forms "a," "the," and "the" used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that in the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship; for example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural.

[0027] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrase “if determination” or “if detection (of the condition or event of the statement)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the condition or event of the statement)” or “in response to detection (of the condition or event of the statement).”

[0028] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application 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 scope of the technical solutions of the embodiments of this application.

Claims

1. A battery combustion test model, characterized in that, include: The test housing (1), the test element (2), and the heating device include a plurality of heating plates (3) and an electronic control module that controls the plurality of heating plates (3). Under the control of the electronic control module, the heating plates (3) perform the following steps to test the test element: Acquire test data when the heating device tests the test element, wherein the test data includes element data and operation data, and the element data includes at least temperature, target gas concentration, and element shape; An operation matrix is ​​generated based on the operation data, and a target topology is determined from a preset test topology based on the test data. Generate an operation sequence based on the target topology and the operation matrix; The heating device is controlled to heat the test element by the operation sequence.

2. The battery combustion test model according to claim 1, characterized in that, The electronic control module includes: A control board for controlling the operation of at least one heating plate (3) and a control circuit for transmitting control signals from the control board to the heating plate (3) and making the heating plate (3) work.

3. The battery combustion test model according to claim 2, characterized in that, include: The control board includes a first switch button (42) for controlling the operation of the heating plate (3), and the first switch button (42) corresponds one-to-one with the heating plate (3).

4. The battery combustion test model according to claim 3, characterized in that, include: When the first switch button (42) is pressed, the first color change operation is performed.

5. A battery combustion test model according to claim 4, characterized in that, include: When the first switch button (42) is pressed and the second switch button (43) is pressed, the pressed first switch performs a second color change operation, and the second switch button (43) is used to control the power supply to the heating plate (3).

6. A battery combustion test model according to claim 3, characterized in that, include: The control board includes a switch remote control (41) and buttons on the switch remote control (41). Multiple buttons are arranged on the switch remote control (41). Multiple switches are arranged in parallel below the buttons. The second switch button (43) is provided with a main switch that connects the power supply and the switch control board circuit. Each switch is connected to the corresponding heating plate (3).

7. A battery combustion test model according to claim 3, characterized in that, include: The control board includes a control display terminal (5) for remotely operating the heating plate (3) and outputting control commands; The control circuit includes a first wireless module (6) for sending control commands from the control board, a second wireless module (7) for receiving control commands from the first wireless module (6), and a processing module (8) for processing the control commands and controlling the designated heating plate (3) to perform heating actions.

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