Testing device for thermal runaway of battery module

Abstract

The utility model discloses a test device for thermal runaway of a battery module, and the device comprises a test box which is provided with an accommodation cavity used for accommodating the battery module, the test box is provided with an exhaust port, and the exhaust port is communicated with the accommodation cavity and an external space; and the exhaust assembly defines an exhaust channel, or the exhaust assembly is matched with the inner wall of the containing cavity to form the exhaust channel, an inlet of the exhaust channel is suitable for being communicated with an exhaust valve of the battery module arranged in the containing cavity, and an outlet of the exhaust channel is communicated with the exhaust port. According to the test device provided by the utility model, the thermal runaway test of the test device is more authentic, so that the thermal runaway test data of the battery module is more accurate, and the structural design and adjustment of the battery pack can be better carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of test equipment, in particular to a test device for thermal runaway of a battery module. Background Art

[0002] During the driving process of the vehicle, various complex working conditions are often encountered. With the increasing attention paid to the safety performance of the vehicle, the safety performance of the battery pack becomes more and more important. The safety performance of the battery pack is often directly related to the structural design of the battery pack. With the development of new technologies, the structure of the battery pack is also diverse. Using test equipment to test the safety performance of the battery pack can facilitate the structural design of the battery pack.

[0003] In the related art, the test device conducts thermal runaway tests on a small number of battery cells or battery modules during the test process to obtain relevant parameters during thermal runaway, and then adjust and design the structure of the battery pack. However, the simulation authenticity of the thermal runaway of the battery module by the test device is not good. The situation after the thermal runaway of the battery module during the test process is not consistent with the actual situation, resulting in inaccurate test data obtained by the test device, which in turn affects the design and adjustment of the battery pack structure. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a test device for thermal runaway of a battery module, which can make the thermal runaway of the battery module more realistic during the test and more in line with the actual situation, so that the test data is more accurate and the battery pack can be better designed and adjusted.

[0005] According to the utility model, a test device for thermal runaway of a battery module comprises: a test box, the test box having a housing cavity for accommodating a battery module, the test box being provided with an exhaust port, the exhaust port connecting the housing cavity with an external space; an exhaust component, the exhaust component defining an exhaust passage, or the exhaust component cooperating with the inner wall of the housing cavity to form an exhaust passage, the inlet of the exhaust passage being suitable for communicating with an exhaust valve of the battery module arranged in the housing cavity, and the outlet of the exhaust passage being connected with the exhaust port.

[0006] According to the test device for thermal runaway of a battery module according to the embodiment of the utility model, a test box and an exhaust assembly are provided. The test box has a accommodating chamber, the test box is provided with an exhaust port, the exhaust assembly is arranged in the accommodating chamber and forms an exhaust channel, and the exhaust channel is connected with the exhaust valve and the exhaust port of the battery module in the accommodating chamber. This makes the test device more realistic when conducting a thermal runaway test, thereby making the test data of thermal runaway of the battery module more accurate, and further enabling the battery pack to be better structurally designed and adjusted.

[0007] In some embodiments of the present invention, there are multiple exhaust channels, there are multiple exhaust ports, and the multiple exhaust ports correspond one-to-one to and are connected to the multiple exhaust channels; or, there is one exhaust port, there is at least one exhaust channel, and the at least one exhaust channel is connected to the exhaust port.

[0008] In some embodiments of the present invention, the exhaust assembly includes: a first exhaust rack, the first exhaust rack defines the exhaust channel, the exhaust channel of the first exhaust rack includes a guide section and a discharge section connected in sequence along the gas flow direction, the guide section extends along a first direction, one end of the guide section is connected to the exhaust valve, the discharge section extends along a second direction perpendicular to the first direction, one end of the discharge section is connected to the other end of the guide section, and the other end of the discharge section is connected to the exhaust port; and / or, a second exhaust rack, the second exhaust rack defines the exhaust channel, the exhaust channel of the second exhaust rack extends along a second direction and its two ends are respectively connected to the exhaust port and the exhaust valve of the battery module.

[0009] In one embodiment of the utility model, the first exhaust frame comprises: a guide bracket and a front end bracket, the guide bracket is fixed to the bottom wall of the accommodating chamber and cooperates with the bottom wall of the accommodating chamber to define the guide section, the front end bracket is connected to one end of the guide bracket, the front end bracket comprises a first exhaust body and a first fixing plate, the first exhaust body cooperates with the inner wall of the accommodating chamber to define the exhaust section, the first fixing plate is connected to the side of the first exhaust body away from the guide bracket and is fixedly connected to the side wall of the accommodating chamber; and / or, the second exhaust frame comprises: a second exhaust body and a second fixing plate, the second exhaust body cooperates with the inner wall of the accommodating chamber to define the exhaust channel, the second fixing plate is connected to the side of the second exhaust body away from the battery module in the first direction, and is fixedly connected to the side wall of the accommodating chamber; wherein, when the exhaust assembly comprises the first exhaust frame and the second exhaust frame, the first exhaust frame and the second exhaust frame are respectively arranged on opposite sides of the battery module in the first direction.

[0010] In some examples of the present invention, an air outlet is formed on the guide bracket, the air outlet is connected to the guide section and the accommodating cavity, a plurality of the air outlets are provided, and the plurality of the air outlets are arranged at intervals along the first direction.

[0011] In some embodiments of the utility model, the test device also includes a fixed bracket, which includes: a box body, the box body having a fixing groove for accommodating the battery module; a plurality of support blocks, the plurality of support blocks are arranged at intervals on the lower side of the box body, the support blocks, the box body and the bottom wall of the accommodating cavity cooperate to define an exhaust cavity, and the exhaust cavity is connected between the explosion-proof valve of the battery module and the entrance of the exhaust channel.

[0012] In one embodiment of the utility model, the fixed bracket also includes: a mounting plate, a plurality of the mounting plates are provided, and the plurality of the mounting plates are arranged along the circumference of the box body. The test device also includes a support frame, the support frame is fixed in the accommodating cavity, the fixed bracket is supported on the support frame through the mounting plate, and the mounting plate is detachably connected to the support frame.

[0013] In some embodiments of the present invention, the test box includes a cover body and a box body, the top of the box body is open, the cover body is arranged on the open side of the box body, and the box body and the cover body cooperate to define the accommodating cavity.

[0014] In one embodiment of the utility model, the test device also includes: a first reinforcing plate, the first reinforcing plate is connected to the cover body, a plurality of the first reinforcing plates are provided, and the plurality of the first reinforcing plates are arranged at intervals along the first direction; a second reinforcing plate, the second reinforcing plate is connected to the box body, a plurality of the second reinforcing plates are provided, and the plurality of the second reinforcing plates are arranged at intervals along the first direction, wherein the plurality of the first reinforcing plates are staggered in the vertical direction, and / or the first reinforcing plate and the second reinforcing plate are arranged opposite to each other in the vertical direction.

[0015] In some examples of the present invention, the test device also includes a third reinforcing plate, which is vertically arranged and disposed in the accommodating cavity, and the two ends of the third reinforcing plate are respectively connected to the cover body and the box body, or the third reinforcing plate is connected to at least one of the first reinforcing plate and the second reinforcing plate.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an exploded view of a test device according to an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of a local enlargement at A shown in FIG.

[0019] Figure 3 is a schematic diagram of a test device according to an embodiment of the utility model;

[0020] Figure 4 yes Figure 3 A schematic diagram of the cross section at BB shown in FIG.

[0021] Figure 5 yes Figure 3 A schematic diagram of the cross section at CC shown in ;

[0022] Figure 6 It is a schematic diagram of the explosion of the exhaust assembly, the battery module, the fixing bracket and the supporting frame according to an embodiment of the utility model;

[0023] Figure 7 is a schematic diagram of the arrangement relationship between the first reinforcing plate and the second reinforcing plate according to an embodiment of the utility model;

[0024] Figure 8 is a schematic diagram of the arrangement relationship of the first reinforcing plate, the second reinforcing plate and the third reinforcing plate according to another embodiment of the utility model;

[0025] Fig. 9 It is a schematic diagram of the arrangement relationship of the first reinforcing plate, the second reinforcing plate and the third reinforcing plate according to another embodiment of the utility model.

[0026] Reference numerals:

[0027] 10. test box; 11. cover; 12. box body; 101. accommodating cavity; 102. exhaust port; 103. exhaust hole;

[0028] 201, guide section; 202, air collecting cavity; 203, air outlet;

[0029] 21, first exhaust frame; 211, guide bracket; 212, front end bracket; 2121, first exhaust body; 2122, first fixing plate;

[0030] 22. Second exhaust frame; 221. Second exhaust body; 222. Second fixing plate;

[0031] 301, fixing groove; 31, fixing bracket; 311, box body; 312, mounting plate; 313, reinforcing rib; 32, supporting block;

[0032] 40. support frame; 50. first reinforcing plate; 60. second reinforcing plate; 70. third reinforcing plate;

[0033] 80. Strengthening bracket; 81. Connecting plate; 82. Supporting plate; 90. Connecting bracket;

[0034] 100. Test device; 200. Battery module. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] Reference below Figure 1-Figure 9 A test device 100 for thermal runaway of a battery module 200 according to an embodiment of the present invention is described.

[0037] like Figure 1-Figure 9 As shown, a test device 100 for thermal runaway of a battery module 200 according to an embodiment of the utility model comprises: a test box 10 and an exhaust assembly, the test box 10 having a housing cavity 101 for accommodating the battery module 200, an exhaust port 102 being provided on the test box 10, the exhaust port 102 connecting the housing cavity 101 with the external space; the exhaust assembly defines an exhaust channel, or the exhaust assembly cooperates with the inner wall of the housing cavity 101 to form an exhaust channel, the inlet of the exhaust channel is suitable for being connected to an exhaust valve of the battery module 200 arranged in the housing cavity 101, and the outlet of the exhaust channel is connected to the exhaust port 102.

[0038] In this embodiment, the exhaust channel can be defined by the exhaust component, and the exhaust channel can also be defined by the exhaust component and the inner wall of the accommodating chamber 101. When the test device 100 performs a thermal runaway test, a battery cell in the battery module 200 experiences thermal runaway after overcharging, heating or puncture, and the gas generated by the thermal runaway of the battery cell is discharged from the exhaust valve into the exhaust channel, and the gas flows along the exhaust channel to the exhaust port 102 and is finally discharged to the external space of the test box 10.

[0039] It is understandable that a battery pack is generally provided with a plurality of battery modules 200 and exhaust channels for exhausting thermal runaway. In the present embodiment, a test box 10 is provided and a battery module 200 and an exhaust channel are provided in the test box 10, which can well simulate the actual structural condition of the battery pack, so that when the battery module 200 has thermal runaway, the flow direction and state of the gas in the accommodating cavity 101, the influence of other battery cells in the battery module 200 on the gas flow, etc. are more realistic, thereby making the test data obtained by the test device 100, such as the gas flow rate, the pressure in the test box 10 during thermal runaway, the gas flow rate discharged from the exhaust port, etc., more accurate, so that the battery pack can be better structurally adjusted and designed according to the test data.

[0040] According to the test device 100 for thermal runaway of the battery module 200 of the embodiment of the utility model, a test box 10 and an exhaust assembly are provided, the test box 10 has a accommodating chamber 101, the test box 10 is provided with an exhaust port 102, the exhaust assembly is arranged in the accommodating chamber 101 and forms an exhaust channel, the exhaust channel is connected with the exhaust valve and the exhaust port 102 of the battery module 200 in the accommodating chamber 101, so that the test device 100 is more authentic when performing a thermal runaway test, thereby making the test data of the thermal runaway of the battery module 200 more accurate, and further enabling the battery pack to be better structurally designed and adjusted.

[0041] In some embodiments of the present invention, both the test box 10 and the exhaust assembly can be sheet metal parts.

[0042] It can be understood that the test device 100 of the present embodiment accommodates a battery module 200 in the accommodating cavity 101. Compared with the test using a small number of battery cells or a single battery cell, the battery module 200 is larger in size, so that the overall structural size of the test box 10 and the exhaust assembly of the test device 100 is larger. The production and processing of the test device 100 has a certain impact on the thermal runaway test verification cycle of the battery module 200. In addition, the test box 10 and the exhaust assembly need to have good structural strength to resist the gas impact when the battery module 200 thermally runs away.

[0043] In the present embodiment, the test box 10 and the exhaust assembly are configured as sheet metal parts, and are manufactured by sheet metal processing, so that the test box 10 and the exhaust assembly are light in weight, high in rigidity, and fast in processing and production, which can well meet the test verification needs of the test device 100, reduce the time required for the production and processing of the test device 100, and thus shorten the test verification cycle of thermal runaway of the battery module 200.

[0044] In some embodiments of the present invention, reference Figure 1 As shown, there may be multiple exhaust channels, and there may be multiple exhaust ports 102 . The multiple exhaust ports 102 correspond to and are connected to the multiple exhaust channels one by one.

[0045] It is understandable that the battery module 200 is generally provided with a plurality of battery cells arranged in an array, and the battery pack is often provided with a plurality of exhaust channels for exhaust diversion. In this embodiment, a plurality of exhaust channels are provided, so that when the battery module 200 is in thermal runaway, the gas can flow in the plurality of exhaust channels, so that when the battery module 200 is in thermal runaway during the test, the gas flow is more realistic, so that the test data obtained by the test device 100 test verification is more accurate. For example, the exhaust channels can be provided with two, three, four, etc., and the exhaust ports 102 are provided with two, three, four, etc.

[0046] In some embodiments of the present invention, reference Figure 1 As shown, there may be one exhaust port 102 , and the number of exhaust channels may be at least one, and the at least one exhaust channel is connected to the exhaust port 102 .

[0047] In this embodiment, at least one exhaust channel is provided, one exhaust channel may be provided, or multiple exhaust channels may be provided. The exhaust port 102 is connected to one exhaust channel, or the exhaust port 102 may be connected to multiple exhaust channels. It is understandable that in a battery pack, multiple exhaust channels are usually provided to be connected to the exhaust valves of some battery cells of the battery module 200, and finally connected to the total pressure relief valve on the battery pack. In this embodiment, at least one exhaust channel is provided to be connected to the exhaust port 102, which can simplify the exhaust channel structure to a certain extent, reduce the number of structures of the test device 100, thereby reducing the processing time of the test device 100, shortening the test verification cycle, and making the structural arrangement of the exhaust channel more in line with the actual situation, so that the test data of the test device 100 is more authentic, so that the battery pack can be better designed and adjusted. For example, the exhaust port 102 can be connected to one exhaust channel, or the exhaust port 102 can be connected to two, three, four, or other exhaust channels.

[0048] In some embodiments of the present invention, Figure 1 and Figure 4 As shown, the exhaust assembly may include: a first exhaust frame 21, the first exhaust frame 21 defines an exhaust channel, the exhaust channel of the first exhaust frame 21 includes a guide section 201 and an exhaust section connected in sequence along the gas flow direction, the guide section 201 is connected along the first direction (such as Figure 1 The guide section 201 extends in a front-to-rear direction (shown in FIG. 1 ), one end of the guide section 201 is connected to the exhaust valve, and the exhaust section extends in a second direction (shown in FIG. 1 ) perpendicular to the first direction. Figure 1 The discharge section extends in the left-right direction (as shown in the figure), one end of the discharge section is connected to the other end of the guide section 201, and the other end of the discharge section is connected to the exhaust port 102.

[0049] When the test device 100 is conducting a test verification, the gas generated by the thermal runaway of the battery module 200 flows along the guide section 201 to the discharge section and is discharged from the exhaust port 102. In this embodiment, a first exhaust frame 21 is provided in the exhaust assembly to define an exhaust channel, and the exhaust channel includes a guide section 201 and a discharge section, and has a simple structure, so that the gas can be well discharged out of the test box 10. In this embodiment, the guide section 201 and the discharge section are arranged vertically, which can make the arrangement of the exhaust assembly in the accommodating chamber 101 more compact to a certain extent, thereby reducing the volume of the test box 10, making the overall structure of the test device 100 more compact and small, and the gas changes direction after flowing through the guide section 201 and is discharged from the discharge section, which can better match the actual situation to a certain extent, thereby making the gas flow situation more realistic, and thus enabling the test device 100 to better conduct the test verification of the thermal runaway of the battery module 200.

[0050] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, the exhaust assembly may include: a second exhaust rack 22, the second exhaust rack 22 defines an exhaust channel, the exhaust channel of the second exhaust rack 22 extends along the second direction and the two ends are respectively connected to the exhaust port 102 and the exhaust valve of the battery module 200.

[0051] When the test device 100 performs test verification, the gas generated by the battery module 200 flows out from the exhaust channel defined by the second exhaust frame 22 to the exhaust port 102. In this embodiment, the exhaust assembly is provided with a second exhaust frame 22, and the second exhaust frame 22 defines an exhaust channel with a simple structure, so that the gas can be easily discharged from the exhaust channel.

[0052] In some embodiments of the present invention, Figure 1 As shown, the exhaust assembly may include: a first exhaust frame 21 and a second exhaust frame 22 .

[0053] Specifically, the first exhaust rack 21 defines an exhaust channel, and the exhaust channel of the first exhaust rack 21 includes a guide section 201 and a discharge section connected in sequence along the gas flow direction, the guide section 201 extends along the first direction, one end of the guide section 201 is connected to the exhaust valve, and the discharge section extends along a second direction perpendicular to the first direction, one end of the discharge section is connected to the other end of the guide section 201, and the other end of the discharge section is connected to the exhaust port 102; the second exhaust rack 22 defines an exhaust channel, and the exhaust channel of the second exhaust rack 22 extends along the second direction and its two ends are respectively connected to the exhaust port 102 and the exhaust valve of the battery module 200.

[0054] In this embodiment, a first exhaust rack 21 and a second exhaust rack 22 are provided. When the battery module 200 is in thermal runaway, the gas can flow out of the exhaust port 102 from the exhaust channel of the first exhaust rack 21, and the gas can also flow out of the exhaust port 102 from the exhaust channel of the second exhaust rack 22. In this embodiment, the first exhaust rack 21 and the second exhaust rack 22 are provided in the exhaust assembly for exhaust, which can increase the exhaust efficiency of the gas to a certain extent, so that the gas can stably flow along the exhaust channel and be discharged to the outside of the test box 10, thereby reducing the impact of the gas on the exhaust assembly, so that the test device 100 can stably perform the thermal runaway test.

[0055] In one embodiment of the present invention, Figure 1 As shown, the first exhaust frame 21 may include: a guide bracket 211 and a front end bracket 212, the guide bracket 211 is fixed to the bottom wall of the accommodating chamber 101 and cooperates with the bottom wall of the accommodating chamber 101 to define a guide section 201, the front end bracket 212 is connected to one end of the guide bracket 211, the front end bracket 212 includes a first exhaust body 2121 and a first fixing plate 2122, the first exhaust body 2121 cooperates with the inner wall of the accommodating chamber 101 to define a discharge section, the first fixing plate 2122 is connected to the side of the first exhaust body 2121 away from the guide bracket 211 and is fixedly connected to the side wall of the accommodating chamber 101.

[0056] In this embodiment, the first exhaust rack 21 is provided with a guide bracket 211, which is fixed to the bottom wall of the accommodating chamber 101 and cooperates with the bottom wall to define a guide section 201. The structure is simple, so that the guide section 201 can have a good channel structure strength to resist the impact and pressure generated when the gas flows, so that the thermal runaway test of the battery module 200 can be carried out smoothly. In this embodiment, the first exhaust rack 21 is also provided with a front end bracket 212, and the front end bracket 212 is provided with a first exhaust body 2121 and a first fixing plate 2122. When the exhaust assembly is assembled with the test box 10, the guide bracket 211 is fixed to the bottom wall of the accommodating chamber 101, and the front end bracket 212 channel first fixing plate 2122 is fixedly connected to the side wall of the accommodating chamber 101, so that the first exhaust rack 21 is fixed to the test box 10.

[0057] The first exhaust body 2121 cooperates with the guide bracket 211 to form an exhaust channel, which has a simple structure and stable exhaust. The first exhaust body 2121 cooperates with the inner wall of the accommodating cavity 101 to define a discharge section, so that the discharge section has a good channel structure strength to resist gas impact, so that the thermal runaway test of the battery module 200 can be carried out smoothly.

[0058] In one embodiment of the present invention, reference Figure 2As shown, the cross-section of the guiding bracket 211 can be in a C-shape. This can endow the guiding bracket 211 with good structural strength and stiffness, enabling the guiding bracket 211 to better withstand the impact of gas. The guiding bracket 211 can conveniently cooperate with the bottom wall of the accommodating cavity 101 to define the guiding section 201 of the exhaust passage. The structure is simple and the arrangement is convenient. The guiding bracket 211 can have a good connecting and fixing surface to be connected and fixed to the bottom wall of the accommodating cavity 101. Further, the guiding bracket 211 is welded to the bottom wall of the accommodating cavity 101, so that the guiding section 201 formed by the cooperation of the guiding bracket 211 and the bottom wall of the accommodating cavity 101 has good sealing performance, enabling the gas to flow stably along the guiding section 201.

[0059] In an embodiment of the present invention, with reference to Figure 1 and Figure 5 shown, the first exhaust main body 2121 can cooperate with the side wall and the bottom wall of the accommodating cavity 101 to define a gas collecting cavity 202, and the gas collecting cavity 202 is communicated between the discharging section and the exhaust port 102. During the thermal runaway test of the battery module 200 in the battery pack 200, the gas flows along the guiding section 201 to the discharging section and enters the gas collecting cavity 202. The gas can gather in the gas collecting cavity 202 and then be discharged from the exhaust port 102. This can better conform to the gas discharging situation during the thermal runaway of the battery module 200 in the battery pack, making the gas flow situation during the test more realistic, enabling the test data obtained from the test to be more accurate, and further enabling the battery pack to be better designed and adjusted.

[0060] In some examples of the present invention, as Figure 2 and Figure 6 shown, air holes 203 can be formed on the guiding bracket 211. The air holes 203 are communicated with the guiding section 201 and the accommodating cavity 101. There are multiple air holes 203, and the multiple air holes 203 are arranged at intervals along the first direction.

[0061] It can be understood that when the battery module 200 in the battery pack has a thermal runaway, during the process of the gas generated by the thermal runaway flowing along the exhaust passage, part of the gas will escape into the battery pack. In this embodiment, multiple air holes 203 are provided on the guiding bracket 211. The air holes 203 are communicated with the guiding section 201 and the accommodating cavity 101. When the battery module 200 in the test chamber 10 has a thermal runaway, during the process of the gas flowing along the first exhaust rack 21, part of the gas can flow out from the air holes 203 into the accommodating cavity 101 within the guiding section 201, thereby simulating the situation where the gas in the battery pack leaks into the internal space of the battery pack, making the gas flow situation during the thermal runaway of the battery module 200 more consistent with the actual situation, further enhancing the authenticity of the thermal runaway of the battery module 200, making the test data obtained by the test device 100 more accurate, and enabling the battery pack to be better designed and adjusted in terms of structure.

[0062] For example, there may be two, three, four, five, six, seven, eight, etc. air outlet holes 203 , and the plurality of air outlet holes 203 are arranged on the guide bracket 211 at intervals along the first direction.

[0063] like Figure 1 and Figure 5 As shown, the second exhaust rack 22 may include: a second exhaust body 221 and a second fixed plate 222, the second exhaust body 221 cooperates with the inner wall of the accommodating chamber 101 to define an exhaust channel, and the second fixed plate 222 is connected to the side of the second exhaust body 221 that is away from the battery module 200 in the first direction, and is fixedly connected to the side wall of the accommodating chamber 101; wherein, when the exhaust assembly includes a first exhaust rack 21 and a second exhaust rack 22, the first exhaust rack 21 and the second exhaust rack 22 are respectively arranged on opposite sides of the battery module 200 in the first direction.

[0064] In this embodiment, the second exhaust frame 22 is provided with a second exhaust body 221 and a second fixing plate 222. When the second exhaust frame 22 is assembled with the test box 10, the second exhaust body 221 can be fixed with the test box 10 by the second fixing plate 222. The second fixing plate 222 has a simple structure and is easy to fix. The second exhaust body 221 cooperates with the inner wall of the accommodating cavity 101 to define an exhaust channel, which has a simple structure and makes the exhaust channel have a good channel structural strength, so that the thermal runaway test of the battery module 200 can be carried out smoothly.

[0065] In this embodiment, the first exhaust rack 21 and the second exhaust rack 22 are respectively arranged on opposite sides of the battery module 200 in the first direction. When the battery module 200 is in thermal runaway, part of the generated gas flows out from the exhaust channel of the first exhaust rack 21, and the other part of the gas flows out from the exhaust channel of the second exhaust rack 22. It can be understood that when the battery module 200 in the battery pack is in thermal runaway, the gas generally flows toward the two ends of the exhaust channel along the extension direction of the exhaust channel. In this embodiment, the first exhaust rack 21 and the second exhaust rack 22 are arranged at the two ends of the battery module 200 in the first direction, which can better fit the gas flow situation during thermal runaway, so that the thermal runaway of the battery module 200 during the test process is more realistic, and the data obtained by the test device 100 test is more accurate.

[0066] In one embodiment of the present invention, reference Figure 5 and Figure 6As shown, the second exhaust body 221 can cooperate with the bottom wall and the side wall of the accommodating cavity 101 to define the gas collecting cavity 202, and the gas collecting cavity 202 is between the exhaust channel of the second exhaust frame 22 and the exhaust port 102. In this way, it can better fit the actual situation of gas flow when the battery module 200 has thermal runaway, so that the thermal runaway test of the battery module 200 can obtain more accurate test data, so that the battery pack can be better designed and adjusted.

[0067] In some embodiments of the present invention, Figure 6 As shown, the test device 100 may further include a fixing bracket 31 and a plurality of supporting blocks 32. The fixing bracket 31 includes: a box body 311, the box body 311 having a fixing groove 301 for accommodating the battery module 200; a plurality of supporting blocks 32 are arranged at intervals on the lower side of the box body 311, and the supporting blocks 32, the box body 311 and the bottom wall of the accommodating cavity 101 cooperate to define an exhaust cavity, and the exhaust cavity is connected between the explosion-proof valve of the battery module 200 and the entrance of the exhaust channel.

[0068] In this embodiment, a box body 311 is provided to accommodate the battery module 200. The box body 311 has a simple structure and can well support and fix the battery module 200, so that the battery module 200 is stably arranged in the accommodating cavity 101. In this embodiment, a plurality of support blocks 32 are provided. The plurality of support blocks 32 are arranged on the lower side of the box body 311 and cooperate with the bottom wall of the accommodating cavity 101 to define an exhaust cavity. When the battery module 200 is thermally runaway, the high-temperature gas generated by the exhaust valve flows into the exhaust cavity and flows toward the exhaust channel.

[0069] In this embodiment, a plurality of support blocks 32 are provided to cooperate with the bottom wall of the accommodating chamber 101 to define an exhaust chamber, which has a simple structure. The exhaust chamber can cooperate with the exhaust channel to form a relatively closed airflow exhaust channel, so that the flow of gas is more in line with the actual situation, so that the test device 100 can better perform thermal runaway tests. The support block 32 can abut against the bottom wall of the accommodating chamber 101 to support the box body 311, so that the battery module 200 can be stably arranged in the accommodating chamber 101. For example, there can be two, three, four, etc. support blocks 32.

[0070] In one embodiment of the present invention, Figure 6 As shown, two support blocks 32 may be provided, both of which extend along the first direction and are arranged at intervals in the second direction on the lower side of the box body 311. A plurality of through holes are also formed at the bottom of the box body 311. The plurality of through holes are respectively arranged corresponding to the plurality of exhaust valves of the battery module 200, and the plurality of through holes are all connected to the exhaust chamber.

[0071] In this embodiment, the two support blocks 32 are extended along the first direction and arranged at intervals in the second direction. The support blocks 32 cooperate with the box body 311 and the bottom wall of the accommodating cavity 101 to form an exhaust cavity open at both ends in the first direction, which can be easily connected with the exhaust channels of the first exhaust frame 21 and the second exhaust frame 22 arranged on both sides of the battery module 200, thereby facilitating the assembly of the exhaust assembly with the fixed bracket 31 and the support block 32.

[0072] In this embodiment, a plurality of through holes are provided to correspond one to one with a plurality of exhaust valves of the battery module 200, so that the gas can pass through the through holes from the exhaust valves into the exhaust cavity, thereby meeting the gas discharge requirements.

[0073] In one embodiment of the present invention, Figure 6 As shown, the fixed bracket 31 may also include: a mounting plate 312, a plurality of mounting plates 312 are provided, and the plurality of mounting plates 312 are arranged along the circumference of the box body 311. The test device 100 also includes a support frame 40, and the support frame 40 is fixed in the accommodating cavity 101. The fixed bracket 31 is supported on the support frame 40 through the mounting plate 312, and the mounting plate 312 is detachably connected to the support frame 40.

[0074] When the test device 100 is assembled with the battery module 200, the battery module 200 can be assembled with the fixing bracket 31 first. The battery module 200 is first placed in the fixing groove 301 of the box body 311, and the battery module 200 is then placed in the accommodating cavity 101 together with the fixing bracket 31. The mounting plate 312 is fixed with the support frame 40 so that the fixing bracket 31 is fixed on the support frame 40, so that the battery module 200 is assembled and fixed in the accommodating cavity 101.

[0075] In this embodiment, a mounting plate 312 is provided in the fixing bracket 31, so that the fixing bracket 31 can be fixed with the support frame 40 of the test device 100 through the mounting plate 312. The mounting plate 312 has a simple structure and is easy to fix. In this embodiment, the fixing bracket 31 can be installed and fixed in the accommodating cavity 101 more conveniently by fixing the support frame 40 with the fixing bracket 31. The support frame 40 and the fixing bracket 31 are detachably connected, so that the fixing bracket 31 and the battery module 200 can be quickly taken out of the accommodating cavity 101 after the test is completed or when the battery module 200 is replaced for testing, so that the test device 100 is more convenient to use.

[0076] In some examples of the present invention, Figure 6 As shown, the fixing bracket 31 may further include a reinforcing rib 313, wherein the reinforcing rib 313 is provided with a plurality of reinforcing ribs 313 vertically (eg Figure 6The reinforcing ribs 313 are arranged in the first direction (in the vertical direction shown in the figure) and are arranged at intervals along the first direction, and the reinforcing ribs 313 are connected to the box body 311 and the mounting plate 312. In this way, the mounting plate 312 can be well reinforced, so that the connection between the mounting plate 312 and the box body 311 is more firm and reliable, so that the fixing bracket 31 can be more stably and reliably supported on the support frame 40. For example, the reinforcing ribs 313 can be provided with two, three, four, five, etc., and the plurality of reinforcing ribs 313 are arranged at intervals along the first direction.

[0077] In some examples of the present invention, Figure 6 As shown, two support frames 40 may be provided, and the two support frames 40 are arranged in a mirror image in the second direction about the midline of the fixing frame 31 along the first direction. In this way, the support frames 40 can more stably and reliably support and fix the fixing frame 31, so that the battery module 200 can be more stably and reliably arranged in the accommodating cavity 101.

[0078] In one example of the present invention, reference Figure 6 As shown, the support frame 40 may include: a connecting section, a supporting section and a fixing section. The connecting section is arranged horizontally and extends along the first direction, and the connecting section is detachably connected to the fixing plate; the supporting section is arranged vertically and extends along the first direction, and the upper edge of the supporting section is connected to the side edge of the connecting section in the second direction; the fixing section is arranged horizontally and extends along the first direction, and in the second direction, the connecting section is arranged on the side of the supporting section facing the fixing bracket 31, and the fixing section is arranged on the side of the supporting section facing away from the fixing bracket 31, and the side edge of the fixing section is connected to the lower edge of the supporting section.

[0079] In this embodiment, the support frame 40 is configured to include a connecting section, a supporting section and a fixing section. The connecting section is connected with the supporting section and the fixing section to form a Z-shaped structure, which has a simple structure and is convenient and reliable in supporting and fixing. The fixing section is arranged away from the fixing bracket 31 to avoid the support block 32 of the fixing bracket 31, so that the support frame 40 and the fixing bracket 31 are assembled and fixed more conveniently.

[0080] In some embodiments of the present invention, Figure 1 and Figure 4 As shown, the test box 10 may include a cover body 11 and a box body 12 . The top of the box body 12 is open, and the cover body 11 is arranged to cover the open side of the box body 12 . The box body 12 and the cover body 11 cooperate to define a receiving cavity 101 .

[0081] In this embodiment, the test box 10 is configured as a cover body 11 and a box body 12 , which has a simple structure and is easy to use, and facilitates the assembly of the exhaust assembly, the fixing bracket 31 and the battery module 200 in the accommodating cavity 101 .

[0082] In one embodiment of the utility model, a plurality of exhaust holes 103 may be provided on the box body 12, and the plurality of exhaust holes 103 are formed on the side wall of the accommodating chamber 101 and communicate with the external space. It is understandable that during the test, part of the gas generated by thermal runaway is discharged into the accommodating chamber 101. In this embodiment, a plurality of exhaust holes 103 are provided to communicate the accommodating chamber 101 with the external space, so that during the test of the test device 100, when the gas pressure in the accommodating chamber 101 is too high, the gas can be discharged from the exhaust holes 103, thereby avoiding the situation where the test device 100 fails and is damaged due to excessive gas pressure in the accommodating chamber 101, so that the thermal runaway test can continue.

[0083] In one embodiment of the present invention, Figure 1 and Figure 4 As shown, the test device 100 may further include: a first reinforcing plate 50 and a second reinforcing plate 60, the first reinforcing plate 50 being connected to the cover body 11, a plurality of first reinforcing plates 50 being provided, and the plurality of first reinforcing plates 50 being arranged at intervals along the first direction; the second reinforcing plate 60 being connected to the box body 12, a plurality of second reinforcing plates 60 being provided, and the plurality of second reinforcing plates 60 being arranged at intervals along the first direction, wherein the plurality of first reinforcing plates 50 and the second reinforcing plates 60 may be staggered in the vertical direction, and / or the first reinforcing plates 50 and the second reinforcing plates 60 may be arranged opposite to each other in the vertical direction.

[0084] In this embodiment, the first reinforcing plate 50 is provided to strengthen the structure of the cover body 11. A plurality of first reinforcing plates 50 are arranged at intervals along the first direction, so that the cover body 11 can be well structurally reinforced within the extension range in the first direction, thereby preventing the cover body 11 from swelling and deforming due to the increased pressure of the gas in the accommodating chamber 101, so that the cover body 11 can be stably and reliably sealed on the open side of the box body 12 and maintain a good structural space of the accommodating chamber 101, so that the test device 100 can maintain a good structural state during the test, and the thermal runaway test of the battery module 200 can be carried out stably and smoothly.

[0085] In this embodiment, the second reinforcing plate 60 is provided to strengthen the structure of the bottom of the box body 12. A plurality of second reinforcing plates 60 are arranged at intervals along the first direction, so that the bottom of the box body 12 can be well structurally reinforced within the extension range of the first direction, thereby improving the structural strength of the bottom of the box body 12, allowing the exhaust assembly and the support frame 40 to be stably and reliably connected to the bottom wall of the box body 12, thereby preventing the bottom of the box body 12 from swelling and deforming due to the increased pressure of the gas in the accommodating chamber 101, so that the exhaust assembly can cooperate with the bottom wall to form an exhaust channel to maintain a stable and good channel structure, so that the thermal runaway test of the battery module 200 can be carried out stably and smoothly.

[0086] For example, the first reinforcing plates 50 may be provided with two, three, four, five, etc., the second reinforcing plates 60 may be provided with two, three, four, five, etc., the number of the first reinforcing plates 50 and the number of the second reinforcing plates 60 may be the same or different, the first reinforcing plates 50 and the second reinforcing plates 60 may be arranged opposite to each other in the vertical direction, the first reinforcing plates 50 and the second reinforcing plates 60 may be arranged staggered in the vertical direction, a part of the plurality of first reinforcing plates 50 may be arranged opposite to the second reinforcing plates 60 in the vertical direction, and another part of the plurality of first reinforcing plates 50 may be arranged staggered in the vertical direction. The number and arrangement relationship of the first reinforcing plates 50 and the second reinforcing plates 60 may be flexibly arranged according to the reinforcement requirements of the test box 10.

[0087] In some examples of the present invention, Figure 1 As shown, the first reinforcing plate 50 can extend along the second direction, and the second reinforcing plate 60 can extend along the second direction. In this embodiment, the first reinforcing plate 50 is arranged to extend along the second direction, so that the first reinforcing plate 50 can structurally reinforce the cover body 11 within the extension range of the second direction, so that the cover body 11 has better structural strength. The second reinforcing plate 60 is arranged to extend along the second direction, so that the box body 12 can be structurally reinforced within the extension range of the second direction, so that the bottom of the box body 12 has better structural strength.

[0088] In some examples of the present invention, Figure 1 and Figure 4 As shown, the test device 100 may also include a third reinforcing plate 70, which is vertically arranged and disposed in the accommodating cavity 101, and the two ends of the third reinforcing plate 70 are respectively connected to the cover body 11 and the box body 12, or the third reinforcing plate 70 is connected to at least one of the first reinforcing plate 50 and the second reinforcing plate 60.

[0089] In the present embodiment, a third reinforcing plate 70 is provided. The third reinforcing plate 70 is vertically arranged and arranged in the accommodating cavity 101. When the third reinforcing plate 70 is connected to the cover body 11 and the box body 12, the cover body 11 and the box body 12 can be more securely connected and fixed in the vertical direction, and the overall structural strength of the box body 12 and the cover body 11 can be higher, so that the overall structure of the test box 10 is more stable, and the test box 10 can better withstand the pressure of the gas in the accommodating cavity 101 when the battery module 200 thermal runaways, so that the thermal runaway test of the battery module 200 can be carried out stably and smoothly.

[0090] In this embodiment, the third reinforcing plate 70 is connected to at least one of the first reinforcing plate 50 and the second reinforcing plate 60, so that the third reinforcing plate 70 can cooperate with the first reinforcing plate 50 and / or the second reinforcing plate 60 to reinforce the structure of the test box 10, thereby improving the overall structural strength of the test box 10. For example, the third reinforcing plate 70 can be connected to the first reinforcing plate 50, the third reinforcing plate 70 can be connected to the second reinforcing plate 60, and the third reinforcing plate 70 can also be connected to the first reinforcing plate 50 and the second reinforcing plate 60.

[0091] In one embodiment of the present invention, reference Figure 4 As shown, the first reinforcing plate 50 can be arranged on the side of the cover 11 away from the accommodating chamber 101, and the cross section of the first reinforcing plate 50 can be in the shape of a cross. In this way, the space occupied by the first reinforcing plate 50 in the accommodating chamber 101 can be reduced, so that the exhaust assembly and the battery module 200 and other structures can be arranged more conveniently in the accommodating chamber 101 of the test box 10, and the overall structure of the test device 100 can be arranged more compactly.

[0092] In the present embodiment, the cross-section of the first reinforcing plate 50 is in the shape of a "J", so that the first reinforcing plate 50 has excellent structural strength and rigidity and is light in weight. Specifically, the first reinforcing plate 50 may be a sheet metal part, so that the first reinforcing plate 50 can play a good structural reinforcement role on the cover body 11, and the production and processing is relatively convenient and fast, thereby shortening the production and manufacturing time of the test device 100, which is beneficial to shortening the test cycle of the thermal runaway test of the battery module 200, and further making the structural design and adjustment efficiency of the battery pack higher.

[0093] In one embodiment of the present invention, reference Figure 4 As shown, the second reinforcing plate 60 may be disposed on a side of the box body 12 away from the accommodating cavity 101 , and the cross section of the second reinforcing plate 60 may be in the shape of a cross.

[0094] This can reduce the space occupied by the second reinforcing plate 60 in the accommodating chamber 101, making it easier to arrange the exhaust assembly and the battery module 200 and other structures in the accommodating chamber 101 of the test box 10, and making the overall structure of the test device 100 more compact.

[0095] In the present embodiment, the cross-section of the second reinforcing plate 60 is in the shape of a "J", so that the second reinforcing plate 60 has excellent structural strength and rigidity and is light in weight. Specifically, the second reinforcing plate 60 may be a sheet metal part, so that the second reinforcing plate 60 can play a good structural reinforcement role on the cover body 11, and the production and processing is relatively convenient and fast, thereby shortening the production and manufacturing time of the test device 100, which is beneficial to shortening the test cycle of the thermal runaway test of the battery module 200, and further making the structural design and adjustment efficiency of the battery pack higher.

[0096] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, the test device 100 may further include a reinforcing bracket 80 , which extends along the first direction and is connected between the guide bracket 211 and the inner wall of the accommodating chamber 101 .

[0097] In this embodiment, the reinforcing bracket 80 can support and fix the guide bracket 211, so that the first exhaust bracket 21 can be more reliably fixed in the accommodating chamber 101, and the guide bracket 211 can have a good structural strength to withstand the impact of the gas, so that the gas can stably flow along the guide section 201. For example, the reinforcing bracket 80 can be connected to the outside of the guide bracket 211 and the top wall bracket of the accommodating chamber 101, and the reinforcing bracket 80 can also be arranged between the guide section 201 of the guide bracket 211 and the bottom wall of the accommodating chamber 101.

[0098] In one embodiment of the present invention, Figure 2 As shown, the reinforcing bracket 80 may include: a connecting plate 81 and a supporting plate 82, the connecting plate 81 is horizontally arranged and extends along the first direction, the supporting plate 82 is a U-shaped plate, the supporting plate 82 extends along the first direction, the two side ends of the supporting plate 82 in the second direction are respectively connected to the side edge of the connecting plate 81 in the second direction, the connecting plate 81 is connected to the bottom wall of the accommodating cavity 101 and one of the guide brackets 211, and the support plate 82 is connected to the bottom arm of the accommodating cavity 101 and the other one of the guide brackets 211.

[0099] In this embodiment, a connecting plate 81 and a supporting plate 82 are provided in the reinforcing bracket 80, and the supporting plate 82 is provided as a U-shaped plate and connected to the connecting plate 81. Specifically, two connecting plates 81 are provided and are respectively arranged on both sides of the supporting plate 82 in the second direction. The supporting plate 82 is connected to the connecting plate 81 to form a "F"-shaped structure, which has a simple structure and good supporting strength, and can play a good supporting and fixing role for the guide bracket 211, so that the structural strength of the guide bracket 211 is higher, so that the first exhaust frame 21 can guide the gas more stably. In this embodiment, the supporting plate 82 is provided as a U-shaped plate, so that when the reinforcing bracket 80 is arranged in the guide section 201, the gas can still flow smoothly in the guide section 201. For example, the reinforcing bracket 80 can be connected to the bottom wall of the accommodating chamber 101 through the connecting plate 81, and the supporting plate 82 is connected to the guide bracket 211. The reinforcing bracket 80 can also be turned vertically 180 degrees to connect the connecting plate 81 to the guide bracket 211 and the supporting plate 82 to the bottom wall of the accommodating chamber 101.

[0100] In some examples of the present invention, Figure 2As shown, there may be a plurality of support plates 82, and the plurality of support plates 82 are arranged at intervals along the first direction. This can reduce the shielding of the support plates 82 in the second direction in the guide section 201, so that the gas can flow more smoothly in the guide section 201. For example, there may be two, three, four, etc. support plates 82.

[0101] In one embodiment of the present invention, Figure 1 As shown, the test device 100 may further include a connecting bracket 90 , and a plurality of connecting brackets 90 are provided, wherein the plurality of connecting brackets 90 are connected between the front end bracket 212 and the bottom wall of the accommodating chamber 101 and between the second exhaust bracket 22 and the bottom wall of the accommodating chamber 101 .

[0102] In this embodiment, a connecting bracket 90 is provided to be connected between the front end bracket 212 and the bottom wall of the accommodating chamber 101. Specifically, the connecting bracket 90 can be provided in the discharge section of the front end bracket 212. The connecting bracket 90 is connected and fixed to the front end bracket 212 and the bottom wall of the accommodating chamber 101, and can play a role in connecting and fixing the front end bracket 212 in the vertical direction, so that the front end bracket 212 and the bottom wall of the accommodating chamber 101 are more firmly connected and fixed, and the structural strength of the front end bracket 212 is enhanced, so that the front end bracket 212 can withstand the impact of the gas well, and the gas can flow out stably along the outlet section.

[0103] In this embodiment, the connecting bracket 90 is connected between the second exhaust rack 22 and the bottom wall of the accommodating chamber 101. Specifically, the connecting bracket 90 is arranged in the exhaust channel of the second exhaust rack 22. The connecting bracket 90 is connected and fixed to the second exhaust rack 22 and the bottom wall of the accommodating chamber 101, so that the second exhaust rack 22 can be more securely connected and fixed to the bottom wall of the accommodating chamber 101, and the structural strength of the second exhaust rack 22 is higher, so that the second exhaust rack 22 can better withstand the impact of the gas, and the gas can flow stably along the exhaust channel.

[0104] The following will refer to Figure 1-Figure 9 A test device 100 for thermal runaway of a battery module 200 according to a specific embodiment of the present invention is described.

[0105] like Figure 1-Figure 9 As shown, the test device 100 includes a test box 10 , an exhaust assembly, a fixing bracket 31 , a support bracket 40 , a first reinforcing plate 50 , a second reinforcing plate 60 , a reinforcing bracket 80 and a connecting bracket 90 .

[0106] The test box 10 includes a cover 11 and a box 12. The upper side of the box 12 is open. The cover 11 is arranged on the open side of the box 12 and is connected and fixed to the box 12 by fasteners. The cover 11 cooperates with the box 12 to form a receiving chamber 101. The box 12 is a rectangular parallelepiped. An exhaust hole 103 is formed on one of the shorter side walls of the box 12. Two exhaust holes 103 are arranged vertically at intervals. One of the longer side walls of the box 12 is also formed with two exhaust holes 103 arranged vertically at intervals. The exhaust holes 103 are both connected to the receiving chamber 101. An exhaust port 102 is formed on the other of the longer side walls of the box 12. Two exhaust ports 102 are provided and are arranged at intervals in the first direction.

[0107] The exhaust assembly includes a first exhaust frame 21 and a second exhaust frame 22. The first exhaust frame 21 includes a guide bracket 211 and a front bracket 212, the guide bracket 211 extends along the first direction, the guide bracket 211 extends along the second direction and is connected to one end of the guide bracket 211 close to the side wall of the accommodating chamber 101, the front bracket 212 includes a first exhaust body 2121 and a first fixing plate 2122, the first fixing plate 2122 is fixed to the side wall of the accommodating chamber 101 by fasteners, the first exhaust body 2121 is fixed to the side wall of the accommodating chamber 101 in the second direction by fasteners, the guide bracket 211 is welded and fixed to the bottom wall of the accommodating chamber 101 and cooperates to form a guide section 201, the first exhaust body 2121 cooperates with the bottom wall of the accommodating chamber 101 to form a discharge section, the first exhaust body 2121 cooperates with the first fixing plate 2122 and the bottom wall and side wall of the accommodating chamber 101 to form a gas collecting chamber 202, and the gas collecting chamber 202 is connected to the exhaust port 102. The first exhaust body 2121 is formed with a plurality of air outlet holes 203 arranged at intervals along the first direction, and the air outlet holes 203 are communicated with the accommodating cavity 101 and the guide section 201 .

[0108] The fixing bracket 31 includes a box body 311, a support block 32 and a mounting plate 312. Two mounting plates 312 are provided. The two mounting plates 312 are respectively arranged on both sides of the box body 311 in the second direction. Six reinforcing ribs 313 are provided between the upper side of the mounting plate 312 and the box body 311. The six reinforcing ribs 313 are arranged at intervals along the first direction, and two reinforcing ribs 313 are provided with lifting holes used as lifting ears. Two support blocks 32 are provided and extend along the first direction. The two support blocks 32 are arranged at intervals at the bottom of the box body 311 in the second direction. The bottom of the support block 32 abuts against the bottom wall of the accommodating cavity 101. The support block 32 cooperates with the box body 311 and the bottom of the accommodating cavity 101 to form an exhaust cavity. The box body 311 has a fixing groove 301. The upper side of the fixing groove 301 is open. The battery module 200 is fixed in the fixing groove 301. The gap between the battery module 200 and the fixing groove 301 is filled with potting glue. A plurality of through holes are formed at the bottom of the fixing groove 301 , corresponding one-to-one to the plurality of exhaust valves of the battery module 200 , and the through holes are connected to the exhaust cavity.

[0109] The first exhaust rack 21 is arranged on one side of the fixed bracket 31 in the first direction. The guide section 201 of the first exhaust rack 21 is connected to the exhaust cavity and abuts and cooperates with the support block 32 and the surface of one side of the box body 311 in the first direction to form a closed communication structure. The second exhaust rack 22 is arranged on the other side of the fixed bracket 31 in the first direction. The second exhaust rack 22 includes a second exhaust body 221 and a second fixing plate 222. The second fixing plate 222 is connected and fixed to the side wall of the accommodating cavity 101 in the first direction by fasteners. The second exhaust body 221 cooperates with the bottom wall of the accommodating cavity 101 to form an exhaust channel, and the exhaust channel is connected to the exhaust cavity. The second exhaust body 221 cooperates with the bottom wall and side wall of the accommodating cavity 101 to define a gas collecting cavity 202, and the gas collecting cavity 202 is connected to the exhaust port 102.

[0110] Two support frames 40 are provided and extend along the first direction. The two support frames 40 are spaced apart in the second direction. The support frames 40 are welded and fixed to the bottom wall of the accommodating cavity 101 . The support frames 40 are connected and fixed to the mounting plate 312 by fasteners.

[0111] There are three first reinforcing plates 50, which are arranged on the upper side surface of the cover body 11 and are arranged at intervals in the first direction. The first reinforcing plates 50 are welded and fixed to the cover body 11, and the cross section of the first reinforcing plates 50 is in the shape of a Chinese character "X". There are four second reinforcing plates 60, which are arranged on the outer side surface of the bottom of the box body 12, and are arranged at intervals in the first direction. The second reinforcing plates 60 and the first reinforcing plates 50 are arranged staggered in the vertical direction, and the cross section of the second reinforcing plates 60 is in the shape of an inverted Chinese character "X".

[0112] In other embodiments of the utility model, the test device 100 may further include a third reinforcing plate 70, which is vertically arranged and disposed in the accommodating cavity 101. Six third reinforcing plates 70 are provided and are arranged in groups of two in the first direction. The two third reinforcing plates 70 in each group are arranged in the second direction. Each group of third reinforcing plates 70 may be connected to a first reinforcing plate 50, and each group of third reinforcing plates 70 may also be connected to the cover body 11 and the box body 12. Each group of third reinforcing plates 70 may also be connected to a first reinforcing bar and a second reinforcing plate 60 to form a fixing structure for the cover body 11 and the box body 12.

[0113] The matching relationship and connection relationship between the third reinforcing plate 70 and the first reinforcing plate 50 and the second reinforcing plate 60, and the number of the third reinforcing plate 70 and the first reinforcing plate 50 and the second reinforcing plate 60 can be set according to the actual reinforcement needs of the test box 10. For example, when the battery module 200 is small, only the first reinforcing plate 50 and the second reinforcing plate 60 can be set. When the battery module 200 is large, the first reinforcing plate 50, the second reinforcing plate 60 and the third reinforcing plate 70 can be set. When greater structural reinforcement is required, the third reinforcing plate 70 is connected to the first reinforcing plate 50 or to the first reinforcing plate 50 and the third reinforcing plate 70, and so on. They are not listed one by one here.

[0114] The reinforcing bracket 80 is arranged in the guide section 201 and extends along the first direction. The reinforcing bracket 80 includes a connecting plate 81 and a support plate 82. The connecting plate 81 has two, and the support plate 82 is an inverted U-shape and the two end edges are respectively connected to the connecting plate 81. The connecting plate 81 and the support plate 82 can be integrally formed. There are multiple support plates 82 arranged at intervals along the first direction. The bottom side of the support plate 82 is welded to the bottom wall of the accommodating cavity 101, and the connecting plate 81 is welded and fixed to the guide bracket 211.

[0115] There are four connecting brackets 90, two of which are arranged in the discharge section of the first exhaust frame 21, and the other two are arranged in the exhaust channel of the second exhaust frame 22. The connecting bracket 90 is fixedly connected to the front end bracket 212 and the second exhaust body 221 by fasteners, and the connecting bracket 90 is welded and fixed to the bottom wall of the accommodating cavity 101.

[0116] In the test device 100 of the present embodiment, the box body 12, the fixing bracket 31, etc. are all made of steel and are sheet metal parts. The test device 100 of the present embodiment is used for a thermal runaway test of a battery module 200 having cylindrical battery cells. During the process of the test device 100 testing the thermal runaway of the battery module 200, the battery cells in the battery module 200 thermally runaway to generate high-temperature and high-pressure gas, which flows into the exhaust cavity from the through holes of the box body 311. A portion of the gas in the exhaust cavity flows along the exhaust channel of the first exhaust rack 21 through the guide section 201 and the discharge section and through the gas collecting cavity 202, and finally flows out from the exhaust port 102. Another portion of the gas flows along the exhaust channel of the second exhaust rack 22 and the gas collecting cavity 202, and finally flows out from the exhaust port 102. During the flow of the gas in the exhaust channel of the first exhaust rack 21, part of the gas is released from the gas outlet into the accommodating cavity 101. The test personnel can use the detection devices such as sensors arranged on the test device 100 to collect data such as the gas pressure in the accommodating cavity 101 and the air flow size in the exhaust channel during the thermal runaway process, as well as other test operations.

[0117] According to the test device 100 for thermal runaway of the battery module 200 of the embodiment of the utility model, a test box 10 and an exhaust assembly are provided, the test box 10 has a accommodating chamber 101, the test box 10 is provided with an exhaust port 102, the exhaust assembly is arranged in the accommodating chamber 101 and forms an exhaust channel, the exhaust channel is connected with the exhaust valve and the exhaust port 102 of the battery module 200 in the accommodating chamber 101, so that the test device 100 is more authentic when performing a thermal runaway test, thereby making the test data of the thermal runaway of the battery module 200 more accurate, and further enabling the battery pack to be better structurally designed and adjusted.

[0118] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0119] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0120] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0121] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0122] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A test device for thermal runaway of a battery module, characterized in that: include: A test box, the test box having a receiving cavity for receiving the battery module, the test box being provided with an exhaust port, the exhaust port connecting the receiving cavity with an external space; An exhaust component defines an exhaust channel, or the exhaust component cooperates with the inner wall of the accommodating cavity to form an exhaust channel, the inlet of the exhaust channel is suitable for communicating with the exhaust valve of the battery module arranged in the accommodating cavity, and the outlet of the exhaust channel is connected to the exhaust port.

2. The test device for thermal runaway of a battery module according to claim 1, characterized in that: There are multiple exhaust channels, and multiple exhaust ports, and the multiple exhaust ports correspond to and are connected to the multiple exhaust channels one by one; or, There is one exhaust port, and there is at least one exhaust channel, and each of the at least one exhaust channel is connected to the exhaust port.

3. The test device for thermal runaway of a battery module according to claim 1, characterized in that: The exhaust assembly comprises: a first exhaust frame, wherein the first exhaust frame defines the exhaust channel, the exhaust channel of the first exhaust frame comprises a guide section and a discharge section connected in sequence along a gas flow direction, the guide section extends along a first direction, one end of the guide section is connected to the exhaust valve, the discharge section extends along a second direction perpendicular to the first direction, one end of the discharge section is connected to the other end of the guide section, and the other end of the discharge section is connected to the exhaust port; and / or, A second exhaust rack, wherein the second exhaust rack defines the exhaust channel, the exhaust channel of the second exhaust rack extends along a second direction and has two ends respectively connected to the exhaust port and the exhaust valve of the battery module.

4. The test device for thermal runaway of a battery module according to claim 3, characterized in that: The first exhaust frame comprises: a guide bracket and a front end bracket, the guide bracket is fixed to the bottom wall of the accommodating chamber and cooperates with the bottom wall of the accommodating chamber to define the guide section, the front end bracket is connected to one end of the guide bracket, the front end bracket comprises a first exhaust body and a first fixing plate, the first exhaust body cooperates with the inner wall of the accommodating chamber to define the exhaust section, the first fixing plate is connected to a side of the first exhaust body away from the guide bracket and is fixedly connected to the side wall of the accommodating chamber; and / or, The second exhaust frame comprises: a second exhaust body and a second fixing plate, the second exhaust body cooperates with the inner wall of the accommodating cavity to define the exhaust channel, the second fixing plate is connected to a side of the second exhaust body away from the battery module in the first direction, and is fixedly connected to the side wall of the accommodating cavity; Wherein, when the exhaust assembly includes the first exhaust rack and the second exhaust rack, the first exhaust rack and the second exhaust rack are respectively arranged on two opposite sides of the battery module in the first direction.

5. The test device for thermal runaway of a battery module according to claim 4, characterized in that: An air outlet hole is formed on the guide bracket, and the air outlet hole is communicated with the guide section and the accommodating cavity. A plurality of the air outlet holes are provided, and the plurality of the air outlet holes are arranged at intervals along the first direction.

6. The test device for thermal runaway of a battery module according to any one of claims 1 to 5, characterized in that: Also included is a fixing bracket, the fixing bracket comprising: A box body, the box body having a fixing groove for accommodating the battery module; A plurality of support blocks are arranged at intervals on the lower side of the box body, and the support blocks, the box body and the bottom wall of the accommodating cavity cooperate to define an exhaust cavity, and the exhaust cavity is connected between the explosion-proof valve of the battery module and the entrance of the exhaust channel.

7. The test device for thermal runaway of a battery module according to claim 6, characterized in that: The fixed bracket also includes: a mounting plate, a plurality of the mounting plates are provided, and the plurality of the mounting plates are arranged along the circumference of the box body. The test device also includes a support frame, which is fixed in the accommodating cavity. The fixed bracket is supported on the support frame through the mounting plate, and the mounting plate is detachably connected to the support frame.

8. The test device for thermal runaway of a battery module according to any one of claims 1 to 5, characterized in that: The test box comprises a cover body and a box body. The top of the box body is open, and the cover body is arranged on the open side of the box body. The box body cooperates with the cover body to define the accommodating cavity.

9. The test device for thermal runaway of a battery module according to claim 8, characterized in that: Also includes: A first reinforcing plate, the first reinforcing plate is connected to the cover body, a plurality of the first reinforcing plates are provided, and the plurality of the first reinforcing plates are arranged at intervals along a first direction; A second reinforcing plate, the second reinforcing plate is connected to the box body, a plurality of the second reinforcing plates are provided, and the plurality of the second reinforcing plates are arranged at intervals along the first direction, Wherein, a plurality of the first reinforcing plates and the second reinforcing plates are arranged staggered in the vertical direction, and / or, the first reinforcing plates and the second reinforcing plates are arranged opposite to each other in the vertical direction.

10. The test device for thermal runaway of a battery module according to claim 9, characterized in that: It also includes a third reinforcing plate, which is vertically arranged and disposed in the accommodating cavity. Both ends of the third reinforcing plate are respectively connected to the cover body and the box body, or the third reinforcing plate is connected to at least one of the first reinforcing plate and the second reinforcing plate.

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