Thermal runaway testing device and battery cell charging and discharging testing system
By designing a thermal runaway test device including clamps and clamping components, the problem of instability in the fixing of the heating plate is solved, the stability and safety of thermal runaway test of lithium batteries is realized, and heating plates of different thicknesses and sizes are adapted to. Extends the service life of the heating assembly.
Patent Information
- Application Number
- CN202420893439.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-28
AI Technical Summary
During the production process of lithium batteries, the heating plate is difficult to fix and easily disengage during thermal runaway test, resulting in interruption of the test and easy damage to the heating plate and wasted resources. The existing technology cannot effectively solve this problem.
A thermal runaway testing device including a first clamp, a heating assembly, a clamping assembly, a second clamp and a temperature sensing assembly are designed, and the heating sheet is fixed through a depression groove and a plug-in channel, and the clamping assembly and fasteners are ensured. The position is stable, and the temperature sensing component detects the battery cell temperature.
It realizes stable fixation of the heating components, avoids test interruptions, and adapts to heating sheets of different thicknesses and sizes, improving service life and test stability and safety.
Smart Images
Figure CN222354035U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of testing tooling, and in particular relates to a thermal runaway testing device and a battery cell charging and discharging testing system. Background Art
[0002] At present, in the production process of lithium batteries, it is necessary to conduct thermal runaway tests on the battery cells. During the thermal runaway test, the battery cells need to be heated by a heating sheet.
[0003] In the related art, it is necessary to use a steel ruler to measure the center position of the battery cell and place the heating plate at the center position of the battery cell. The operation is relatively complicated, and the heating plate and the battery cell cannot be well fixed. The heating plate can easily separate from the battery cell, resulting in test interruption. At the same time, the thinner heating plate is easily damaged during use, resulting in waste of resources.
[0004] Therefore, it is urgent to develop a new thermal runaway test device and a battery cell charge and discharge test system to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a thermal runaway test device and a battery cell charge and discharge test system.
[0006] In order to solve the above technical problems, the utility model provides a thermal runaway testing device, which includes: a first clamping plate, a heating component, a clamping component, a second clamping plate and a temperature sensing component; wherein a sunken groove is provided on the surface of the first clamping plate for movably installing the heating component and the clamping component; the heating component is suitable for moving to a set heating position in the sunken groove, and the clamping component moves in the sunken groove until it abuts against the heating component; a battery cell is suitable for placing between the first clamping plate and the second clamping plate, the temperature sensing component is located between the battery cell and the second clamping plate, and the first clamping plate and the second clamping plate are suitable for clamping the battery cell, so that the heating component heats the battery cell and the temperature sensing component detects the temperature data of the battery cell.
[0007] Specifically, the heating assembly comprises: a heating plate; the heating plate is movably embedded in the sunken groove, and the heating plate is suitable for moving in the sunken groove.
[0008] Specifically, the two inner side walls of the sunken groove are respectively in contact with the two sides of the heating plate.
[0009] Specifically, a plurality of plug-in channels are provided in the first clamping plate; the entrance of the plug-in channel is located at the edge of the first clamping plate, and the exit of the plug-in channel is connected to the sunken groove; the heating assembly also includes: a plurality of connecting wires; each of the connecting wires enters the sunken groove from the corresponding plug-in channel and is connected to the heating plate.
[0010] Specifically, the clamping assembly includes: two moving blocks; the two moving blocks are respectively installed in the sunken groove in a limited sliding manner, and the two moving blocks are respectively located on both sides of the heating plate.
[0011] Specifically, the temperature sensing component includes: a temperature sensing wire; the temperature sensing wire is located between the battery core and the second clamping plate to detect the temperature of the battery core.
[0012] Specifically, a wire groove is provided on the surface of the second clamping plate for embedding the temperature sensing wire.
[0013] Specifically, the first clamping plate and the second clamping plate are fixed by fasteners.
[0014] On the other hand, the utility model provides a battery cell charge and discharge test system, which includes: a thermal runaway test device and a charge and discharge device as described above; wherein the thermal runaway test device is suitable for clamping the battery cell, and the charge and discharge device is connected to the battery cell, so that the thermal runaway test device and the charge and discharge device perform a thermal runaway test on the battery cell.
[0015] Specifically, the heating component in the thermal runaway testing device is located at the center of the battery cell.
[0016] The beneficial effect of the utility model is that the utility model uses the first clamping plate to cooperate with the clamping assembly to limit and fix the heating assembly, so that the heating assembly can be easily adjusted to the set heating position, and the first clamping plate and the second clamping plate can clamp the battery cell, and the heating assembly and the battery cell cannot be separated, ensuring that the test is stable and safe, and can also adapt to heating assemblies of different thicknesses and sizes, while improving the service life of the heating assembly.
[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by implementing the present invention.
[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a structural diagram of the first splint of the utility model;
[0021] Figure 2 is a cross-sectional view of the first splint of the utility model;
[0022] Figure 3 It is a structural diagram of the second splint of the utility model;
[0023] Figure 4 It is a structural diagram of the thermal runaway testing device of the utility model.
[0024] In the figure:
[0025] 1. first clamping plate; 11. sunken groove; 12. plug-in channel;
[0026] 2. Heating assembly; 21. Heating sheet; 22. Connecting wire;
[0027] 3. Clamping assembly; 31. Moving block;
[0028] 4. second clamping plate; 41. wire trough;
[0029] 5. Temperature sensing component; 51. Temperature sensing line;
[0030] 6. Battery cells;
[0031] 7. Fasteners. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] Embodiment 1, in this embodiment, as Figures 1 to 4 As shown, this embodiment provides a thermal runaway testing device, which includes: a first clamping plate 1, a heating component 2, a clamping component 3, a second clamping plate 4 and a temperature sensing component 5; wherein the surface of the first clamping plate 1 is provided with a sunken groove 11 for movably installing the heating component 2 and the clamping component 3; the heating component 2 is suitable for moving to a set heating position in the sunken groove 11, and the clamping component 3 moves in the sunken groove 11 until it abuts against the heating component 2; the first clamping plate 1 and the second clamping plate 4 are suitable for placing the battery cell 6, the temperature sensing component 5 is located between the battery cell 6 and the second clamping plate 4, and the first clamping plate 1 and the second clamping plate 4 are suitable for clamping the battery cell 6, so that the heating component 2 heats the battery cell 6 and the temperature sensing component 5 detects the temperature data of the battery cell 6.
[0034] In this embodiment, the first clamping plate 1 cooperates with the clamping assembly 3 to limit and fix the heating assembly 2, so that the heating assembly 2 can be easily adjusted to the set heating position, and the first clamping plate 1 and the second clamping plate 4 can clamp the battery cell 6, and the heating assembly 2 and the battery cell 6 cannot be separated, ensuring that the test is stable and safe, and can also adapt to heating assemblies 2 of different thicknesses and sizes, while improving the service life of the heating assembly 2.
[0035] In order to flexibly adjust the position of the heating plate 21 , the heating assembly 2 comprises: a heating plate 21 ; the heating plate 21 is movably embedded in the sunken groove 11 , and the heating plate 21 is suitable for moving in the sunken groove 11 .
[0036] Specifically, a gasket may be installed at the bottom of the heating plate 21 to ensure that heating plates 21 of different thicknesses can fit into the sunken groove 11 .
[0037] Specifically, a sunken groove 11 having the same size as the heating plate 21 is opened at the center of the first clamping plate 1 according to the length and width of the heating plate 21 for placing the heating plate 21 .
[0038] Specifically, the sunken groove 11 can provide the heating plate 21 with a movable range of the same width, can be compatible with heating plates 21 of different widths, and ensure the positioning of the heating plate 21 at the same time.
[0039] In order to prevent the position of the heating plate 21 from being offset, the two inner side walls of the sunken groove 11 are respectively in contact with the two sides of the heating plate 21 .
[0040] In order to facilitate the conduction of the heating plate 21, a plurality of plug-in channels 12 are opened in the first clamping plate 1; the entrance of the plug-in channel 12 is located at the edge of the first clamping plate 1, and the outlet of the plug-in channel 12 is connected to the sunken groove 11; the heating component 2 also includes: a plurality of connecting wires 22; each of the connecting wires 22 enters the sunken groove 11 from the corresponding plug-in channel 12 and connects with the heating plate 21.
[0041] Specifically, the connecting wire 22 includes: a power line and a temperature line. By connecting the connecting wire 22 to the heating plate 21, the operation of the heating plate 21 can be controlled and the heating temperature of the heating plate 21 can be adjusted to ensure the normal use of the heating plate 21.
[0042] In order to limit the position of the heating plate 21 , the clamping assembly 3 includes two moving blocks 31 . The two moving blocks 31 are respectively slidably installed in the sunken groove 11 , and the two moving blocks 31 are respectively located on both sides of the heating plate 21 .
[0043] Specifically, a convex portion is provided on the side of the moving block 31 , and a concave portion is provided on the inner side wall of the sunken groove 11 , so that the moving block 31 and the sunken groove 11 are connected in a limited sliding manner.
[0044] In order to detect the temperature of the battery core 6 in real time, the temperature sensing component 5 includes a temperature sensing line 51 ; the temperature sensing line 51 is located between the battery core 6 and the second clamping plate 4 to detect the temperature of the battery core 6 .
[0045] Specifically, the temperature sensing line 51 can monitor the temperature rise rate of the battery cell 6 and determine whether thermal runaway occurs in the battery cell 6 .
[0046] In order to prevent the temperature sensing wire 51 from deviating and affecting the test result, a wire groove 41 is formed on the surface of the second clamping plate 4 for embedding the temperature sensing wire 51 .
[0047] In order to fix the battery cell 6 between the first clamping plate 1 and the second clamping plate 4 , the first clamping plate 1 and the second clamping plate 4 are fixed by a fastener 7 .
[0048] Specifically, the fastener 7 is a bolt.
[0049] First, connect the connecting wire 22 to the temperature control device and the power supply device, insert the connecting wire 22 into the plug-in channel 12 to the sunken groove 11, connect the connecting wire 22 to the heating plate 21, and then put the heating plate 21 into the sunken groove 11 and move it to the set heating position, then move the two moving blocks 31 to clamp the heating plate 21, place the battery cell 6 on the heating plate 21, and then place the temperature sensing wire 51 in the wire groove 41 on the second clamping plate 4, place the second clamping plate 4 on the battery cell 6, ensure that the battery cell 6 is located at the center position of the first clamping plate 1 and the second clamping plate 4, use fasteners 7 to fix the first clamping plate 1 and the second clamping plate 4 to ensure that the heating plate 21 will not fall off during the heating process.
[0050] Embodiment 2, based on embodiment 1, this embodiment provides a battery cell 6 charge and discharge test system, which includes: a thermal runaway test device and a charge and discharge device as provided in embodiment 1; wherein the thermal runaway test device is suitable for clamping the battery cell 6, and the charge and discharge device is connected to the battery cell 6, so that the thermal runaway test device and the charge and discharge device perform a thermal runaway test on the battery cell 6.
[0051] In order to ensure the test accuracy, the heating component 2 in the thermal runaway test device is located at the center of the battery cell 6.
[0052] In summary, the utility model uses the first clamping plate and the clamping assembly to limit and fix the heating assembly, so that the heating assembly can be easily adjusted to the set heating position, and the first clamping plate and the second clamping plate can clamp the battery cell, and the heating assembly and the battery cell cannot be separated, ensuring that the test is stable and safe, and can also adapt to heating assemblies of different thicknesses and sizes, while improving the service life of the heating assembly.
[0053] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.
[0054] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0056] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.
[0057] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0058] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
[0059] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A thermal runaway test device, characterized in that: include: A first clamping plate, a heating assembly, a clamping assembly, a second clamping plate and a temperature sensing assembly; in A sunken groove is provided on the surface of the first clamping plate for movably mounting the heating component and the clamping component; The heating component is adapted to move to a set heating position in the sunken groove, and the clamping component moves in the sunken groove until it abuts against the heating component; The battery cell is placed between the first clamping plate and the second clamping plate, the temperature sensing component is located between the battery cell and the second clamping plate, and the first clamping plate and the second clamping plate are suitable for clamping the battery cell so that the heating component heats the battery cell and the temperature sensing component detects the temperature data of the battery cell.
2. The thermal runaway testing device according to claim 1, characterized in that: The heating assembly comprises: a heating sheet; The heating plate is movably embedded in the sunken groove, and the heating plate is suitable for moving in the sunken groove.
3. The thermal runaway testing device according to claim 2, characterized in that: The two inner side walls of the sunken groove are respectively in contact with the two sides of the heating plate.
4. The thermal runaway testing device according to claim 2, characterized in that: The first clamping plate is provided with a plurality of insertion channels; The inlet of the plug-in channel is located at the edge of the first clamping plate, and the outlet of the plug-in channel is connected to the sunken groove; The heating assembly also includes: a plurality of connecting wires; Each of the connecting wires enters the sunken groove from the corresponding plug-in channel and is connected with the heating plate.
5. The thermal runaway testing device according to claim 2, characterized in that: The clamping assembly comprises: two moving blocks; The two moving blocks are respectively installed in the sunken groove in a limited sliding manner, and the two moving blocks are respectively located on both sides of the heating plate.
6. The thermal runaway testing device according to claim 1, characterized in that: The temperature sensing component comprises: a temperature sensing line; The temperature sensing line is located between the battery core and the second clamping plate to detect the temperature of the battery core.
7. The thermal runaway testing device according to claim 6, characterized in that: A wire groove is provided on the surface of the second clamping plate for embedding the temperature sensing wire.
8. The thermal runaway testing device according to claim 1, characterized in that: The first clamping plate and the second clamping plate are fixed by fasteners.
9. A battery cell charge and discharge test system, characterized in that: include: The thermal runaway test device and the charging and discharging device according to any one of claims 1 to 8; in The thermal runaway test device is suitable for clamping the battery cell, and the charging and discharging equipment is connected to the battery cell, so that the thermal runaway test device and the charging and discharging equipment perform a thermal runaway test on the battery cell.
10. The battery cell charge and discharge test system according to claim 9, characterized in that: The heating component in the thermal runaway testing device is located at the center of the battery cell.