Automatic temperature rise control system for lithium battery thermal runaway

Abstract

The utility model relates to the technical field of lithium battery heating, in particular to a lithium battery thermal runaway automatic temperature rise control system which comprises a heating mechanism. The heating mechanism comprises a controller, a heating key, a heating relay, an alarm, a power meter, a heating piece attached to a lithium battery to be heated, a switching power supply and a temperature sensor attached to the middle of the heating piece; the controller is electrically connected with the heating relay, the heating key, the switching power supply, the temperature sensor and the alarm, the output end of the heating relay is connected with the heating piece through a wire, the power meter is arranged between the heating relay and the heating piece, and the data output end of the power meter is connected with the input end of the controller.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery heating technology, specifically to an automated temperature rise control system for lithium battery thermal runaway. Background Technology

[0002] With the widespread use of lithium batteries in electric vehicles, energy storage systems, and portable electronic devices, battery safety has become a major concern. Especially under extreme conditions, lithium batteries can experience thermal runaway, an exothermic reaction that, once initiated, causes a rapid rise in battery temperature, potentially leading to fires or even explosions. Therefore, developing effective thermal runaway testing methods and automated temperature control systems is crucial for evaluating battery safety performance.

[0003] Existing methods and devices for simulating and testing thermal runaway in lithium batteries mainly involve manually adjusting the power of the heating device to gradually increase the battery temperature until thermal runaway is triggered. While this method is simple, it has significant drawbacks, such as being cumbersome to operate, prone to human error, difficult to precisely control the heating rate and temperature, and unable to accurately simulate thermal runaway conditions in actual applications.

[0004] Based on the above, there is an urgent need for an automatic temperature rise control system for lithium battery thermal runaway, which can achieve automated, precise, and efficient heating of lithium batteries. Utility Model Content

[0005] The technical problem solved by this utility model is to provide an automated heating control system for lithium battery thermal runaway, which can realize automated, precise and efficient heating of lithium battery.

[0006] The basic solution provided by this utility model is: an automated temperature rise control system for thermal runaway of lithium batteries, including a heating mechanism. The heating mechanism includes a controller, a heating button, a heating relay, an alarm, a power meter, a heating element attached to the lithium battery to be heated, a switching power supply, and a temperature sensor attached to the middle of the heating element.

[0007] The controller is electrically connected to the heating relay, heating button, switching power supply, temperature sensor and alarm. The output terminal of the heating relay is connected to the heating element through a wire. The power meter is installed between the heating relay and the heating element, and the data output terminal of the power meter is connected to the input terminal of the controller.

[0008] The principle and advantages of this invention are as follows: In this solution, after detecting that an operator has pressed the heating button, the controller receives a start signal, issues a command, the heating relay closes, and the heating element attached to the lithium battery to be heated begins to heat the lithium battery. The controller monitors the power output of the heating element in real time using a power meter located between the heating relay and the heating element, and transmits this data to the controller. It also collects the temperature of the heating element in real time using a temperature sensor located in the middle of the heating element. Once the collected temperature value exceeds a preset temperature threshold, an alarm is activated.

[0009] 1. A temperature sensor is attached to the center of the heating element to monitor the surface temperature of the lithium battery in real time, ensuring more precise temperature control during the heating process. The controller receives data from the temperature sensor and adjusts the state of the heating relay according to the preset temperature curve or experimental requirements to achieve closed-loop control, ensuring precise temperature control and accurate heating of the lithium battery.

[0010] 2. By combining temperature sensors and alarms, timely alerts can be provided for the thermal runaway state of lithium batteries during the heating process.

[0011] 3. The power meter monitors the power output of the heating element in real time and transmits the required power to the controller to ensure stable power during the heating process and improve the reliability of experimental data.

[0012] 4. The controller automatically adjusts the state of the heating element based on the data from the temperature sensor, realizing automated control of the heating process and reducing the burden of manual operation.

[0013] Furthermore, it also includes a housing, the front end of which has several mounting slots for the installation drawers to extend into, and multiple heating mechanisms are provided, each of which is respectively installed in its respective installation drawer.

[0014] Beneficial effects: In this solution, the heating mechanism is protected by the housing, and multiple heating mechanisms are integrated by setting multiple mounting slots into which the mounting drawer extends. Each heating mechanism is installed as an independent module in the drawer. The setting of multiple heating mechanisms greatly improves the application of the entire system in various scenarios.

[0015] Furthermore, the heating mechanism also includes a power button and a circuit breaker that are electrically connected to the controller, and the power button, circuit breaker, and heating button are embedded in the front end face of the mounting drawer.

[0016] Beneficial effects: In this solution, the entire system is started when the operator presses the power button. The heating start-up and interruption of the entire system are controlled via the power button and circuit breaker settings. All buttons are directly embedded on the front panel, making them easily visible and operable by the operator, avoiding the hassle of searching for a control panel.

[0017] Each heating unit has its own independent control button, allowing individual operation of a heating unit without affecting other units. Circuit breakers, as an additional protection measure, provide a second layer of protection in the event of a main control system failure, preventing damage caused by overload or short circuit.

[0018] Furthermore, the heating mechanism also includes a display module electrically connected to the controller, the display module being embedded in the rear end face of the housing.

[0019] Beneficial effects: In this solution, the controller is used to visualize the temperature collected by the temperature sensor and the data collected by the power meter through the display module.

[0020] Furthermore, a quick connector is provided on the wire between the heating relay and the heating element.

[0021] A beneficial effect is that the quick connector on the wire between the heating relay and the heating element makes the connection between the heating element and the heating relay detachable.

[0022] Furthermore, the quick connector includes a socket embedded in the rear end face of the housing and a plug connected to the heating element; the socket is connected to the heating relay via a wire, and the plug is inserted into the socket to make the heating relay and the heating element conductive.

[0023] Furthermore, the quick connector includes a socket embedded in the rear end face of the housing and a plug strip connected to the heating element. The inner wall of the socket is provided with an internal thread, and the outer wall of the plug strip is provided with an external thread. The internal and external threads engage to make the heating relay connected to the heating element.

[0024] Furthermore, the alarm includes a buzzer and a warning light, with the buzzer of each heating mechanism embedded in the front face of its corresponding mounting drawer.

[0025] Furthermore, mounting brackets are provided at the four corners of the lower end face of the housing, and rollers are provided on the mounting brackets. Attached Figure Description

[0026] Figure 1 This is a logic block diagram of the automated temperature rise control system for lithium battery thermal runaway in Embodiment 1 of this utility model.

[0027] Figure 2This is a schematic diagram of the automatic temperature rise control system for lithium battery thermal runaway in Embodiment 1 of this utility model.

[0028] Figure 3 This is a front view of the drawer installation in Embodiment 1 of this utility model. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] The markings in the accompanying drawings include: housing 1, mounting drawer 2, mounting base 3, power button 4, heating button 5, buzzer 6, mounting bracket 7, roller 8, first heat dissipation hole 9, emergency stop knob 10, handle 11.

[0031] The basic implementation examples are as follows: Figure 1 , Figure 2 and Figure 3 As shown: The lithium battery thermal runaway automatic temperature rise control system includes a housing 1 and a heating mechanism. The heating mechanism includes a controller, a heating button 5, a heating relay, an alarm, a display module, a power button 4, a circuit breaker, a power meter, a heating element attached to the lithium battery to be heated, a switching power supply, and a temperature sensor attached to the middle of the heating element.

[0032] The controller is electrically connected to the heating relay, heating button 5, display module, switching power supply, power button 4, circuit breaker, temperature sensor and alarm. The output terminal of the heating relay is connected to the heating element through a wire. The power meter is installed between the heating relay and the heating element, and the data output terminal of the power meter is connected to the input terminal of the controller.

[0033] The front end face of the housing 1 has several mounting slots for the installation drawers 2 to extend into. Multiple heating mechanisms are provided, each installed within a specific installation drawer 2. In this embodiment, handles 11 are welded and fixed to both sides of the front end face of the installation drawer 2.

[0034] In this embodiment, a quick connector is provided on the wire between the heating element and the heating relay, which enables the connection between the heating element and the heating relay to be detachable.

[0035] In this embodiment, the quick connector includes a socket embedded in the rear end face of the housing 1 and a plug connected to the heating element; the socket is connected to the heating relay via a wire, and the plug is inserted into the socket to make the heating relay and the heating element conductive. Of course, in this embodiment, the temperature sensor and the controller are also detachably connected via a quick connector.

[0036] The alarm includes a buzzer 6 and a warning light. The buzzer 6 of each heating mechanism is embedded in the front surface of its corresponding mounting drawer 2. In this embodiment, all heating mechanisms share a single warning light, which includes three LEDs: a red LED, a yellow LED, and a green LED. In this embodiment, an intermediate relay is provided between the alarm and the controller.

[0037] To facilitate the installation of the warning lights, in this embodiment, a mounting base 3 for installing the warning lights is provided on the upper surface of the housing 1, and the three colors of warning lights are arranged sequentially from top to bottom.

[0038] Mounting brackets 7 are provided at the four corners of the lower end face of the housing 1, and rollers 8 are provided on the mounting brackets 7. In this embodiment, an emergency stop knob 10 electrically connected to the controller is also provided, which can quickly stop the heating operation by rotating the emergency stop knob 10. A communication module electrically connected to the controller is also provided, which connects to a host computer to receive control commands from the host computer. In this embodiment, the communication module is a wired communication module, specifically using RS485, Ethernet, or other methods for data transmission. Heating can be controlled not only by the heating button 5 but also by control commands from the host computer.

[0039] The operator first inserts the plug on the heating element into the socket on the housing 1 to make the heating element and the heating relay conductive, and then attaches the heating element to the lithium battery to be heated. Then, the operator inserts the plug on the temperature sensor into the socket of the quick connector corresponding to the temperature sensor on the housing 1 to make the connection conductive.

[0040] The operator presses the power button 4 to start the system, and then presses the heating button 5. When the controller detects that the heating button 5 has been pressed, the controller receives a start signal, issues a command, the heating relay closes, and the heating element attached to the lithium battery to be heated begins to heat the lithium battery.

[0041] During the heating process, the controller monitors the power output of the heating element in real time using a power meter positioned between the heating relay and the heating element, and transmits the data to the controller. It also collects the temperature of the heating element in real time using a temperature sensor positioned in the middle of the heating element. If the collected temperature value exceeds a preset temperature threshold, an alarm is triggered. The data collected by the temperature sensor and power meter is displayed on the display module. At this point, the controller sends a stop signal to the heating relay, and the heating element stops heating at the heating relay port.

[0042] In this embodiment, multiple heating mechanisms can be used to achieve various heating scenarios. For example, multiple heating mechanisms can simultaneously heat multiple lithium batteries to be heated, or multiple heating mechanisms can jointly heat a single lithium battery to be heated. When multiple heating mechanisms are used simultaneously, if the temperature detected by one heating mechanism exceeds a preset temperature threshold, the buzzer 6 corresponding to that heating mechanism will sound an alarm, and the warning light on the top of the housing 1 will also light up. The operator can promptly know that the temperature is too high based on the warning light, and can quickly locate the corresponding heating mechanism and shut it off in time using the buzzer 6. Of course, in this process, the circuit breaker can prevent damage caused by failure to shut off in time during the heating process.

[0043] The controller can be a microcontroller or a PLC. In this embodiment, a PLC, model SIMATICS7-200, is used, and the power meter, model APN1101D-S, has a maximum strategy current of 40A.

[0044] Example 2

[0045] Compared with Embodiment 1, the difference in this embodiment is that: the quick connector includes a socket embedded in the rear end face of the housing 1 and a plug connected to the heating element. The inner wall of the socket is provided with an internal thread, and the outer wall of the plug is provided with an external thread. The internal thread and the external thread are engaged to make the heating relay and the heating element conduct.

[0046] In this embodiment, the heating relay and the heating element are made conductive through the engagement of internal and external threads, greatly enhancing the connection strength between them. In this embodiment, the heating element attached to the lithium battery to be heated can also be replaced by a heating film, achieving the same heating effect.

[0047] Example 3

[0048] Compared with Embodiment 1, the difference in this embodiment is that: a number of first heat dissipation holes 9 are provided between each installation drawer 2, and a number of first heat dissipation holes 9 are also provided under the bottom installation drawer 2. Each first heat dissipation hole 9 forms a corresponding heat dissipation part by integrating multiple first heat dissipation holes 9, and the heat dissipation parts are evenly distributed.

[0049] In this embodiment, the heat dissipation effect is enhanced by integrating multiple first heat dissipation holes 9 into a heat dissipation part, which is also more aesthetically pleasing. Furthermore, the first heat dissipation holes 9 are set between the mounting drawers 2 and under the bottom mounting drawer 2 to achieve all-round heat dissipation of the mounting drawers 2 of the housing 1.

[0050] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An automated temperature rise control system for lithium battery thermal runaway, characterized in that: The heating mechanism includes a controller, a heating button, a heating relay, an alarm, a power meter, a heating element attached to the lithium battery to be heated, a switching power supply, and a temperature sensor attached to the middle of the heating element. The controller is electrically connected to the heating relay, heating button, switching power supply, temperature sensor and alarm. The output terminal of the heating relay is connected to the heating element through a wire. The power meter is installed between the heating relay and the heating element, and the data output terminal of the power meter is connected to the input terminal of the controller.

2. The lithium battery thermal runaway automated temperature rise control system according to claim 1, characterized in that: It also includes a housing, the front end of which has several mounting slots for the installation drawers to extend into, and multiple heating mechanisms are provided, each of which is installed in a separate installation drawer.

3. The lithium battery thermal runaway automated temperature rise control system according to claim 2, characterized in that: The heating mechanism also includes a power button and a circuit breaker that are electrically connected to the controller. The power button, circuit breaker, and heating button are embedded in the front end of the mounting drawer.

4. The lithium battery thermal runaway automated temperature rise control system according to claim 3, characterized in that: The heating mechanism also includes a display module electrically connected to the controller, the display module being embedded in the rear end face of the housing.

5. The lithium battery thermal runaway automated temperature rise control system according to claim 4, characterized in that: A quick connector is provided on the wire between the heating relay and the heating element.

6. The lithium battery thermal runaway automated temperature rise control system according to claim 5, characterized in that: The quick connector includes a socket embedded in the rear end face of the housing and a plug connected to the heating element; the socket is connected to the heating relay via a wire, and the plug is inserted into the socket to make the heating relay and the heating element conductive.

7. The lithium battery thermal runaway automated temperature rise control system according to claim 5, characterized in that: The quick connector includes a socket embedded in the rear end face of the housing and a strip connected to the heating element. The inner wall of the socket is provided with an internal thread, and the outer wall of the strip is provided with an external thread. The internal and external threads engage to make the heating relay and the heating element conduct.

8. The lithium battery thermal runaway automated temperature rise control system according to claim 6, characterized in that: The alarm includes a buzzer and a warning light, with the buzzer of each heating mechanism embedded in the front face of its corresponding mounting drawer.

9. The lithium battery thermal runaway automated temperature rise control system according to claim 8, characterized in that: Mounting brackets are provided at the four corners of the lower end face of the housing, and rollers are provided on the mounting brackets.

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