Heat spreading test tool

Abstract

The utility model discloses a heat spreading test tool, comprising a first clamping plate which is provided with a plurality of first channels; the second clamping plate is arranged opposite to the first clamping plate, and a containing space used for containing the battery module is formed between the first clamping plate and the second clamping plate; the first sensor is arranged in the first channel; at least part of the heating structure is located in the accommodating space, and the heating structure is used for heating the battery module; a line of the data acquisition unit penetrates through the first channel to be electrically connected with the first sensor, and the data acquisition unit is used for acquiring data detected by the first sensor. Therefore, the design of the first channel enables the installation of the sensor to be more convenient and accurate, reduces the measurement error caused by installation dislocation, guides the line routing of the data collector to pass through the first channel, enables the line layout to be more tidy and ordered, avoids the intersection and interference between lines, and improves the reliability of the data collector. Potential safety hazards caused by disordered lines are reduced, and the safety in the testing process is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery module heat spread test equipment technical field especially relates to heat spread test frock. BACKGROUND

[0002] With the large-scale application of lithium ion battery in the automobile cleaning process, the safety problem of lithium ion battery has to be mentioned. Due to some manufacturing defects or improper use, lithium ion battery will occur thermal runaway phenomenon under extreme conditions. The specific performance is that single battery causes single battery inner joule heat and chemical reaction heat accumulation due to mechanical abuse (extrusion, needle puncture, collision, etc.), electric abuse (overcharge, overdischarge, internal short circuit, etc.) and thermal abuse. After heat accumulation, the temperature in the battery will rise, and finally trigger the thermal runaway chain reaction, causing the battery to catch fire and explode. At the same time, the battery will release more heat during thermal runaway, and under the condition of poor heat dissipation, the adjacent single battery will be heated from normal temperature to trigger thermal runaway by the thermal runaway battery. The process of thermal runaway propagation is called "thermal runaway spread", "thermal runaway diffusion", "thermal runaway expansion" or "thermal runaway propagation". Once the thermal runaway spread occurs, it means that the energy of more than two single batteries is released into the module. The probability of secondary fire of battery system is greatly increased, which means that the whole module and even the whole car are in danger at this time. Therefore, thermal runaway and spread accident is easy to cause personnel casualty and property loss.

[0003] At present, there is no absolutely reliable method to avoid thermal runaway, and thermal runaway spread can be inhibited at the system level through effective design method. In order to avoid such accidents, automobile manufacturers and battery manufacturers will test the module to pre-evaluate the behavior and harm of battery thermal runaway spread.

[0004] A battery module thermal runaway test triggering and monitoring system and method are disclosed in Chinese Patent Publication No. CN112526360A. The battery module thermal runaway test triggering and monitoring system includes at least one heater, at least one temperature sensor, and a data collector. Each heater is identical in volume, shape, and size to one battery monomer, and the heater replaces at least one target battery monomer. The temperature sensor is arranged in the battery module between any two adjacent battery monomers. The data collector is electrically connected to the temperature sensor and is used to obtain temperature data detected by the temperature sensor. The battery thermal runaway triggering system of the present application can trigger the thermal runaway of the battery system by heating, can select a real battery module as the experimental object to test the thermal spread of the battery monomer, can guide the design and operation of the battery thermal management system according to the test results of the thermal spread of the battery monomer, and can also retain the original structure of the battery module to make the test results reliable. However, the battery module thermal runaway test triggering and monitoring system directly arranges the sensor between the two adjacent battery monomers, the installation of the sensor is not convenient, and since the line of the data collector also needs to be electrically connected to the sensor, the line of the data collector is relatively messy and may cause a short circuit risk. Such design not only increases the installation difficulty, but also has potential safety risks. Utility model content

[0005] In order to overcome at least one of the defects of the prior art described above, the utility model provides a thermal spread test tool, which optimizes the installation mode of the sensor and the data collector to improve the safety and accuracy of the test.

[0006] The utility model discloses a technical scheme that is adopted to solve the problem:

[0007] The thermal spread test tool comprises a first clamping plate, a plurality of first channels are formed in the first clamping plate, a second clamping plate is arranged opposite to the first clamping plate, a containing space for placing a battery module is formed between the first clamping plate and the second clamping plate, a first sensor is arranged in the first channel, a heating structure is at least partially located in the containing space, the heating structure is used for heating the battery module, and a data collector is arranged, the line of the data collector passes through the first channel to be electrically connected to the first sensor, and the data collector is used for acquiring data detected by the first sensor.

[0008] According to some embodiments of the utility model, the first sensor comprises a temperature sensor and / or a voltage sensor.

[0009] According to some embodiments of the utility model, a plurality of second channels are formed in the second clamping plate, the thermal spread test tool further comprises a second sensor, the second sensor is arranged in the second channel, and the line of the data collector passes through the second channel and is electrically connected to the second sensor.

[0010] According to some embodiments of the present application, the heat spread test tool further comprises a box, the first clamping plate and the second clamping plate are arranged in the box, the box is provided with a first connecting channel, and the line of the data collector can pass through the first connecting channel and the first channel in sequence to be electrically connected with the first sensor.

[0011] According to some embodiments of the present application, a third channel is arranged on the side wall of the box, the heat spread test tool further comprises a third sensor, the third channel and the third sensor are located between the first clamping plate and the second clamping plate, the third sensor is used for detecting the side of the battery module, and the line of the data collector passes through the third channel to be electrically connected with the third sensor.

[0012] According to some embodiments of the present application, the heat spread test tool further comprises a needling mechanism, a needling end of the needling mechanism is arranged in the box, and the needling mechanism is used for puncturing the top, bottom or side of the battery module.

[0013] According to some embodiments of the present application, the box comprises a box body and a cover, the third channel is arranged in the box body, one side of the box body is provided with an opening, the cover is connected to the opening, and the cover can move relative to the opening between an open position and a closed position.

[0014] According to some embodiments of the present application, the heat spread test tool further comprises an insulating sheet and a plurality of electric connection sheets, the insulating sheet is arranged on the first clamping plate, and the plurality of electric connection sheets are used for electrically connecting with the battery module.

[0015] According to some embodiments of the present application, a plurality of mounting holes are arranged on the first clamping plate, the plurality of mounting holes are used for one-to-one corresponding connection with the end portions of a plurality of battery monomers of the battery module, and the insulating sheet is arranged on the mounting hole.

[0016] According to some embodiments of the present application, the heat spread test tool further comprises a charge-discharge cabinet, the charge-discharge cabinet is electrically connected with the electric connection sheet, and the charge-discharge cabinet is used for triggering overcharge or overdischarge of the battery module.

[0017] In summary, the heat spread test tool provided by the present application has at least the following technical effects:

[0018] On the one hand, the design of the first channel can make the installation of the sensor more convenient and accurate, and reduce the measurement error caused by installation misalignment; on the other hand, the line layout of the data collector is guided through the first channel, so that the line layout is more neat and orderly, the crossing and interference between lines are avoided, the short circuit risk caused by the direct contact between the line of the data collector and the battery module is effectively avoided, the safety hidden danger caused by the disorderly line is reduced, and the safety during the test process is ensured; on the other hand, the installation and wiring process of the sensor and the data collector can be more simple and clear, the line layout is guided through the first channel, so that the installer can more conveniently perform the wiring operation, the operation difficulty and complexity are reduced, and through the standardized line layout, the test tool can be more convenient during the later maintenance and repair process, when the sensor needs to be replaced or the line needs to be checked, only the predetermined line layout needs to be searched and operated, and a large amount of time and effort is not needed to sort out the disorderly line. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic view of a heat spread test tool (the cover is in an open position) according to an embodiment of the present application;

[0020] Figure 2 FIG. 2 is an exploded structural schematic view of a first clamping plate, an insulating sheet and an electric connecting sheet according to an embodiment of the present application;

[0021] Figure 3 FIG. 3 is an assembly structural schematic view of a first clamping plate, a second clamping plate and a battery module according to an embodiment of the present application;

[0022] Figure 4 FIG. 4 is an exploded structural schematic view of a first clamping plate, a second clamping plate and a battery module according to an embodiment of the present application;

[0023] In the drawings, the following signs are used:

[0024] 1, first clamping plate; 11, first channel; 12, mounting hole; 2, second clamping plate; 21, second channel; 3, first sensor; 4, box body; 41, first connecting channel; 42, second connecting channel; 43, third channel; 44, box main body; 45, cover; 5, insulating sheet; 6, electric connecting sheet; 7, battery module; 8, second sensor; 9, third sensor. DETAILED DESCRIPTION

[0025] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0026] In the description of the utility model, it is necessary to explain, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terminology used in the specification of the utility model herein is only for the purpose of describing specific embodiments and is not intended to limit the utility model.

[0028] The utility model will be further described in detail below in combination with the drawings.

[0029] Please refer to Figures 1 to 4 The embodiment discloses a kind of thermal spread test tool, including first clamping plate 1, second clamping plate 2, first sensor 3, heating structure (not shown in figure) and data acquisition device (not shown in figure);First clamping plate 1 is equipped with several first passageways 11;Second clamping plate 2 is oppositely arranged with first clamping plate 1, and the containing space for placing battery module 7 is formed between first clamping plate 1 and second clamping plate 2;First sensor 3 is located in first passageway 11;Heating structure is at least partially located in containing space, and heating structure is used to heat battery module 7;The circuit of data acquisition device passes through first passageway 11 to be electrically connected with first sensor 3, and data acquisition device is used to obtain the data detected by first sensor 3.

[0030] The heat spread test tool disclosed in the embodiment is characterized in that a first channel 11 is formed in the first clamping plate 1 to install the first sensor 3 and the line layout of the data collector. On the one hand, the design of the first channel 11 can make the installation of the sensor more convenient and accurate, and reduce the measurement error caused by installation misalignment. On the other hand, the line layout of the data collector is guided through the first channel 11, so that the line layout is more neat and orderly, the crossing and interference between the lines are avoided, the short circuit risk caused by the direct contact between the line of the data collector and the battery module 7 is effectively avoided, the safety hidden danger caused by the disordered line layout is reduced, and the safety during the test process is ensured. On the other hand, the installation and wiring process of the sensor and the data collector can be more simple and clear. The line layout is guided through the first channel 11, so that the installation personnel can more conveniently perform the wiring operation, the operation difficulty and complexity are reduced, the standardized line layout can make the test tool more convenient during the later maintenance and repair process, and when the sensor needs to be replaced or the line needs to be checked, the predetermined line layout can be searched and operated, without spending a lot of time and effort to sort out the disordered line.

[0031] As Figure 1 and Figure 4As shown, further, in the present embodiment, a plurality of second channels 21 are formed on the second clamping plate 2, and the thermal propagation test tool further comprises a second sensor 8, which is arranged in the second channel 21, and the line of the data collector passes through the second channel 21 and is electrically connected with the second sensor 8. The first sensor 3 and the second sensor 8 are respectively used for measuring the signal change at both ends of the battery module 7. More preferably, in the present embodiment, the first sensor 3 comprises a temperature sensor and a voltage sensor, and the second sensor 8 comprises a temperature sensor and a voltage sensor. In this way, on the one hand, by arranging the second channel 21 on the second clamping plate 2 and installing the second sensor 8, the overall monitoring of the signal change at both ends of the battery module 7 is realized, and the introduction of the second sensor 8 provides an additional data point for the test. Compared with the first sensor 3 alone, the second sensor 8 can monitor the temperature change of the battery module 7 from different positions and angles, reducing the measurement error caused by the limitation of the single sensor position. This multi-point monitoring method improves the accuracy and reliability of the data. The combination of the first sensor 3 and the second sensor 8 can more accurately capture the overall temperature change and voltage change of the battery module 7 during the thermal propagation test, thereby more comprehensively evaluating the safety performance of the battery module 7. On the other hand, similar to the first channel 11, the design of the second channel 21 also plays a role in guiding the line layout of the data collector. This not only makes the line layout more neat and orderly, but also avoids the intersection and interference between the lines, further improving the safety of the test. At the same time, the second channel 21 also provides convenience for the installation and wiring of the second sensor 8, reducing the operation difficulty. On the other hand, the addition of the second sensor 8 and the second channel 21 enables the test tool to more flexibly adapt to the test requirements of battery modules 7 of different sizes and shapes. By adjusting the positions and quantities of the first sensor 3 and the second sensor 8, accurate monitoring of different areas of the battery module 7 can be realized, thereby improving the efficiency and flexibility of the test.

[0032] It should be noted that in some other embodiments, the first sensor 3 can only include a temperature sensor or only include a voltage sensor, and the second sensor 8 can only include a temperature sensor or only include a voltage sensor, which can be set according to actual needs.

[0033] As Figure 1 , Figure 3 and Figure 4As shown, preferably, in the present embodiment, the heat spread test tool further comprises a box 4, the first clamping plate 1 and the second clamping plate 2 are arranged in the box 4, and the box 4 is provided with a first connecting channel 41, and the line of the data collector can pass through the first connecting channel 41 and the first channel 11 in sequence to be electrically connected with the first sensor 3. In this way, on the one hand, by arranging the box 4, the first clamping plate 1 and the second clamping plate 2 and the related sensors and part of the line of the data collector can be arranged in the box 4, and such a closed design not only protects the test tool from the interference of the external environment, but also improves the safety of the test process and avoids potential risks caused by the exposure of the line or the sensor; on the other hand, the first connecting channel 41 arranged on the box 4 provides a clear wiring path for the line of the data collector. The line can pass through the first connecting channel 41 and the first channel 11 in sequence to be electrically connected with the corresponding first sensor 3, and such a design not only makes the line layout more neat and orderly, but also avoids the crossing and entanglement of the lines and reduces the risk of failure caused by the disorder of the lines.

[0034] As shown in Figure 1 , Figure 3 and Figure 4 , more preferably, in the present embodiment, the box 4 is provided with a second connecting channel 42, and the line of the data collector can pass through the second connecting channel 42 and the second channel 21 in sequence to be electrically connected with the first sensor 3; in this way, by additionally arranging the second connecting channel 42 on the box 4, more wiring path options are provided for the line of the data collector, and the line can pass through the second connecting channel 42 and the second channel 21 in sequence to be electrically connected with the corresponding second sensor 8, which more reasonably plans the line layout, avoids the crossing and entanglement of the lines, helps to reduce the interference and errors in the line layout process, and improves the accuracy and reliability of the test.

[0035] As shown in Figure 1 , Figure 3 and Figure 4As shown, preferably, in the present embodiment, the side wall of the box 4 is provided with a third passage 43, and the heat spread test tool further comprises a third sensor 9, the third passage 43 and the third sensor 9 are located between the first clamping plate 1 and the second clamping plate 2, and the third sensor 9 is used to detect the side of the battery module 7. The line of the data collector passes through the third passage 43 to be electrically connected with the third sensor 9. In this way, on the one hand, the third sensor 9 can monitor the signal change of the side of the battery module 7 in real time. This design ensures the comprehensive coverage of the battery module 7 in the heat spread test, makes up for the possible detection blind area, and improves the accuracy and reliability of the test. On the other hand, the third sensor 9 is located between the first clamping plate 1 and the second clamping plate 2, which supplements the original detection passage and sensor, and together forms a complete battery module 7 detection system, which not only improves the overall performance of the test tool, but also makes the test process more smooth and efficient. On the other hand, the introduction of the third passage 43 and the third sensor 9 makes the test tool more flexible to adapt to the test requirements of battery modules 7 of different sizes and shapes. Test personnel can adjust the position and number of the third sensor 9 according to actual conditions to meet the requirements in different test scenarios. This design improves the flexibility and adaptability of the test, so that the test tool can be more widely used in the heat spread test of various battery modules 7.

[0036] Specifically, in the present embodiment, the third sensor 9 also includes a temperature sensor and a voltage sensor. Admittedly, in some other embodiments, the third sensor 9 can only include a temperature sensor or only include a voltage sensor, which can be selected according to actual needs.

[0037] Preferably, in the present embodiment, the heat spread test tool further comprises a needle piercing mechanism (not shown in the figure), and the piercing end of the needle piercing mechanism is arranged in the box 4. The needle piercing mechanism is used to pierce the top surface, bottom surface or side surface of the battery module 7. In this way, the needle piercing mechanism can simulate the abuse conditions that the battery module 7 may encounter in actual use, such as sharp objects piercing the battery module 7. By arranging the piercing end in the box 4 and enabling it to pierce the top surface, bottom surface or side surface of the battery module 7, we can more comprehensively evaluate the heat spread and safety performance of the battery module 7 when it is pierced by external objects. Moreover, the design of the needle piercing mechanism enables the test tool to be adjusted according to different test requirements and types of battery modules 7. Test personnel can change the piercing position, speed and force of the needle piercing mechanism to simulate different abuse scenarios, thereby more flexibly adapting to various test requirements. Specifically, in the present embodiment, the piercing position is changed by changing the installation direction of the battery module 7 relative to the box 4. More specifically, the battery module 7 can be arranged in a horizontal or vertical manner.

[0038] Preferably, in the present embodiment, the box body 4 comprises a box main body 44 and a cover body 45, the third channel 43 is arranged on the box main body 44, one side of the box main body 44 is provided with an opening, and the cover body 45 is connected to the opening and can move relative to the opening between the open position and the closed position. This design makes it easy for the tester to install and disassemble the battery module 7, improving the convenience and efficiency of the test operation; and when the cover body 45 is in the closed position, it can effectively close the opening of the box main body 44, preventing external factors (such as air flow, dust, etc.) from interfering with the test environment. This design ensures the stability and consistency of the test environment, thereby improving the accuracy and reliability of the test; in addition, the third channel 43 is arranged on the box main body 44 independently of the movement trajectory of the cover body 45, which ensures that the third channel 43 is not affected by the movement of the cover body 45 during the test process, ensuring that the third sensor 9 can stably and accurately detect the side temperature of the battery module 7.

[0039] Preferably, in the present embodiment, the heat spread test tool further comprises an insulating sheet 5 and a plurality of electrical connecting sheets 6, the insulating sheet 5 is arranged on the first clamping plate 1, and the plurality of electrical connecting sheets 6 are used to electrically connect with the battery module 7; in this way, on the one hand, the arrangement of the insulating sheet 5 effectively isolates the battery module 7 from other parts of the test tool, preventing direct conduction of electric current, thereby greatly reducing the risk of electric shock during the test. This is of great significance to the safety of the tester and the prevention of equipment damage; on the other hand, the number and relative position of the plurality of electrical connecting sheets 6 can be adjusted according to actual conditions to adapt to different models and different sizes of battery modules 7. This design makes the test tool more widely applicable to the testing of various battery modules 7, improving the universality and flexibility of the test, so there is no need to purchase a separate test device for each battery module 7, which greatly reduces the test cost and improves the economy of the test tool; on the other hand, by adjusting the number and position of the electrical connecting sheets 6, the tester can quickly connect the test tool with the battery module 7 to be tested without the need for complex adaptation or customization. This greatly simplifies the test preparation process and improves test efficiency; on the other hand, the design of the electrical connecting sheets 6 makes them easy to disassemble and replace, which is of great significance to the maintenance of the normal operation of the test tool and the upgrading of the test capability.

[0040] Preferably, in the embodiment, a plurality of mounting holes 12 are formed on the first clamping plate 1, and the plurality of mounting holes 12 are used to connect the end portions of the plurality of battery monomers of the battery module 7 one by one, and the insulating sheet 5 is arranged on the mounting hole 12. In this way, on the one hand, the plurality of mounting holes 12 formed on the first clamping plate 1 are connected to the end portions of the plurality of battery monomers of the battery module 7 one by one, and this design ensures that the battery monomers can be stably and accurately connected to the test tool, thereby ensuring the accuracy and reliability of the test data; on the other hand, the insulating sheet 5 is ingeniously arranged on the mounting hole 12, effectively realizing the electrical isolation between the battery monomers and other parts of the test tool, which not only improves the safety of the test and prevents the direct conduction of current and the potential risk of short circuit, but also protects the battery monomers from mechanical damage; in addition, the test personnel can easily connect the battery module 7 to the test tool through the mounting hole 12 without complex adaptation or customization work, and the installation of the insulating sheet 5 is also very simple, further improving the convenience of the test operation.

[0041] Preferably, in the embodiment, the mounting hole 12 is a circular hole. In this way, the shape of the circular hole perfectly matches the shape of the end portion of the cylindrical battery, ensuring that the battery can be stably and accurately inserted into the mounting hole 12, and this design not only improves the accuracy of the test, but also avoids test errors caused by improper connection; and due to the adaptability of the circular hole to the cylindrical battery, the test personnel can quickly insert the battery into the mounting hole 12 without complex adjustment or adaptation work, which greatly improves the convenience and efficiency of the test operation.

[0042] It should be noted that in some other embodiments, the mounting hole 12 can also be square or hexagonal or other special shapes, which can be selected according to actual needs.

[0043] Preferably, in the embodiment, the thermal propagation test tool further comprises a charge and discharge cabinet (not shown in the figure), and the charge and discharge cabinet is electrically connected with the electrically connected sheet 6. The charge and discharge cabinet is used to trigger overcharge or overdischarge of the battery module 7. Specifically, the charge and discharge cabinet can trigger thermal propagation by large-current overcharge, small-current overcharge, large-current overdischarge, small-current overdischarge, etc., which is helpful to comprehensively evaluate the thermal propagation performance of the battery module 7 under different charge and discharge states, and improve the accuracy and reliability of the test.

[0044] Specifically, in the embodiment, the first clamping plate 1 and the second clamping plate 2 are made of one or more of polycarbonate PC, polyoxymethylene POM, polyamide PA, thermoplastic polyester PBT / PET, modified polyphenyl ether MPPO, etc.

[0045] Specifically, in the embodiment, a plurality of threaded rods (not shown in the figure) are connected between the first clamping plate 1 and the second clamping plate 2, and the threaded rods can fix the relative positions of the first clamping plate 1 and the second clamping plate 2 to fix the battery module 7 in the accommodation space.

[0046] Preferably, in the embodiment, the box body 44 is made of transparent glass, and the cover body 45 is made of stainless steel.

[0047] Preferably, in the embodiment, the data collector comprises at least one temperature recorder, a voltage recorder and a gas analyzer. Specifically, in the embodiment, the gas analyzer comprises a tail gas collecting device extending into the box body 44, the gas analyzer monitors the change of the gas pressure in the box body 44, ignores the influence of temperature on the volume of the box body 44, assumes that the volume of the box body 44 remains unchanged during the thermal runaway test, and the test gas pressure is affected by temperature. In order to calculate the gas volume, the test gas volume result needs to be converted into the gas volume at normal temperature and pressure for comparison.

[0048] Therefore, the thermal propagation test tool disclosed in the embodiment can simulate the series and parallel connection of the battery module 7 in the automobile battery pack, and can simultaneously realize overcharge, heating, bottom needle piercing triggering thermal propagation and side needle piercing triggering thermal propagation of the battery module 7. The box body 44 is sealed, and the module gas production during the test can be recorded and analyzed. The thermal propagation test tool is simple and convenient to configure, has various triggering modes, records comprehensive data, realizes one machine with multiple functions, and provides multi-angle research data for battery thermal system management and thermal propagation early warning.

[0049] In summary, the thermal propagation test tool disclosed in the embodiment can at least bring the following beneficial technical effects:

[0050] 1) The design of the first channel 11 can make the installation of the sensor more convenient and accurate, and reduce the measurement error caused by misalignment during installation;

[0051] 2) The line layout of the data collector is guided through the first channel 11, so that the line layout is more orderly, the intersection and interference between lines are avoided, the short circuit risk caused by the direct contact between the line of the data collector and the battery module 7 is effectively avoided, and the safety hidden danger caused by the disorderly line is reduced;

[0052] 3) The installation and wiring process of the sensor and the data collector can be more simple and clear, the line layout is guided through the first channel 11, so that the installation personnel can more conveniently perform the wiring operation, the operation difficulty and complexity are reduced, and through the standardized line layout, the test tool can be more convenient in the later maintenance and repair process;

[0053] 4) The heat spread test tool is simple in configuration, various in triggering mode, comprehensive in data recording, realizes one machine with multiple uses, and provides multi-angle research data for battery thermal system management and heat spread early warning.

[0054] The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the utility model, and these improvements and refinements are also regarded as the protection scope of the utility model.

Claims

1. A heat spread testing fixture, characterized in that, include: The first clamping plate (1) has a plurality of first channels (11) on it; The second clamping plate (2) is disposed opposite to the first clamping plate (1), and a receiving space for placing the battery module (7) is formed between the first clamping plate (1) and the second clamping plate (2); The first sensor (3) is located in the first channel (11); A heating structure, at least partially located in the receiving space, is used to heat the battery module (7); A data acquisition device, the lines of which pass through the first channel (11) to be electrically connected to the first sensor (3), the data acquisition device being used to acquire data detected by the first sensor (3).

2. The thermal spread testing fixture according to claim 1, characterized in that, The first sensor (3) includes a temperature sensor and / or a voltage sensor.

3. The thermal spread testing fixture according to claim 1, characterized in that, The second clamping plate (2) has several second channels (21). The heat spread test fixture also includes a second sensor (8). The second sensor (8) is located in the second channel (21). The data acquisition device's line passes through the second channel (21) and is electrically connected to the second sensor (8).

4. The thermal spread testing fixture according to claim 1, characterized in that, The heat spread test fixture also includes a housing (4), the first clamping plate (1) and the second clamping plate (2) are disposed inside the housing (4), the housing (4) is provided with a first connecting channel (41), and the line of the data acquisition device can pass through the first connecting channel (41) and the first channel (11) in sequence to be electrically connected to the first sensor (3).

5. The thermal spread testing fixture according to claim 4, characterized in that, The side wall of the housing (4) is provided with a third channel (43). The heat spread test fixture also includes a third sensor (9). The third channel (43) and the third sensor (9) are located between the first clamping plate (1) and the second clamping plate (2). The third sensor (9) is used to detect the side of the battery module (7). The line of the data acquisition device passes through the third channel (43) to be electrically connected to the third sensor (9).

6. The thermal spread testing fixture according to claim 4, characterized in that, The heat spread test fixture also includes a needle piercing mechanism. The needle piercing end of the needle piercing mechanism is located inside the housing (4). The needle piercing mechanism is used to pierce the top, bottom or side of the battery module (7).

7. The thermal spread testing fixture according to claim 5, characterized in that, The box (4) includes a box body (44) and a cover (45). The third channel (43) is disposed on the box body (44). An opening is provided on one side of the box body (44). The cover (45) is connected to the opening. The cover (45) can move between an open position and a closed position relative to the opening.

8. The thermal spread test fixture according to any one of claims 1-7, characterized in that, The thermal spread test fixture also includes an insulating sheet (5) and a plurality of electrical connecting pieces (6). The insulating sheet (5) is disposed on the first clamping plate (1), and the plurality of electrical connecting pieces (6) are used for electrical connection with the battery module (7).

9. The thermal spread testing fixture according to claim 8, characterized in that, The first clamping plate (1) has multiple mounting holes (12), which are used to connect one-to-one with the ends of multiple battery cells of the battery module (7), and the insulating sheet (5) is covered on the mounting holes (12).

10. The thermal spread testing fixture according to claim 8, characterized in that, The thermal propagation test fixture also includes a charge / discharge cabinet, which is electrically connected to the electrical connection piece (6). The charge / discharge cabinet is used to trigger overcharging or over-discharging of the battery module (7).

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