Battery module with exhaust cooling device

Abstract

The utility model discloses a battery module with an exhaust cooling device. The battery module comprises a shell and the exhaust cooling device, and one side of the shell is provided with an exhaust hole opening. The exhaust cooling device comprises a first-layer cooling filter screen and a second-layer cooling filter screen, the first-layer cooling filter screen and the second-layer cooling filter screen are arranged in the shell and located on the same side of the opening of the exhaust hole, a first opening is formed in one side of the first-layer cooling filter screen, a second opening is formed in one side of the second-layer cooling filter screen, and the first opening is communicated with the second opening. The first opening and the second opening are staggered and located on different sides. The first opening, the second opening and the opening of the exhaust hole form an air flow channel, so that air in the shell flows out along the air flow channel. Therefore, when the battery cell is in thermal runaway, the pressure in the battery module shell can be reduced, and high-temperature and high-pressure gas can be cooled, depressurized and discharged, so that the external fire of the battery module is avoided.

Description

Technical Field

[0001] This utility model relates to a battery module, and more particularly to a battery module with an exhaust cooling device. Background Technology

[0002] As the green energy industry places increasing demands on safety, the number of batteries carried in battery modules is also constantly increasing, leading to more stringent safety requirements. However, current battery module materials are no longer sufficient to meet increasingly stringent fire safety and fire prevention regulations. When a battery cell experiences thermal runaway, in addition to releasing high-temperature, high-pressure gases, it also melts the cell support structure inside the casing, producing tar. This tar can clog the pre-designed vents, further increasing the internal pressure and temperature of the battery module. This can trigger a chain reaction, causing other cells inside to burn, or it can force open the casing, allowing high-temperature, high-pressure gases to escape uncontrollably and ignite other components outside the casing.

[0003] Therefore, in view of the problems of the prior art, this utility model further proposes a battery module with an exhaust cooling device, which ensures that large-scale burning of the battery module is avoided in the event of thermal runaway within the limited space of the battery module, thereby solving the problems caused by conventional technology. Summary of the Invention

[0004] In view of the above problems, the purpose of this utility model is to provide a battery module with an exhaust cooling device, which can reduce the pressure inside the battery module shell and allow the high-temperature and high-pressure gas to be cooled and discharged when the battery cell is thermally runaway, thus preventing the battery module from catching fire.

[0005] To achieve the above objectives, this utility model provides a battery module with an exhaust cooling device, comprising a housing and the exhaust cooling device. An exhaust port opening is provided on one side of the housing. The exhaust cooling device includes a first cooling filter and a second cooling filter, which are disposed within the housing and located on the same side of the exhaust port opening. A first opening is provided on one side of the first cooling filter, and a second opening is provided on one side of the second cooling filter. The first and second openings are staggered and located on different sides. The first opening, the second opening, and the exhaust port opening form an airflow channel, allowing gas within the housing to flow out along the airflow channel.

[0006] In some embodiments, there is a gap between the first cooling filter and the second cooling filter.

[0007] In some embodiments, the airflow channel provides that the gas flows in from the first opening, flows out from the second opening along the space between the first layer of cooling filter and the second layer of cooling filter, and flows out from the exhaust port opening.

[0008] In some embodiments, the airflow channel includes a first airflow channel and a second airflow channel, wherein the first airflow channel is located between the first cooling filter and the second cooling filter, and the second airflow channel is located between the second cooling filter and the exhaust port opening.

[0009] In some embodiments, the first cooling filter and the second cooling filter are made of metal.

[0010] In some embodiments, the system further includes: a plurality of sieve holes disposed on the first cooling filter and the second cooling filter, wherein the sieve holes are sized to allow gas to pass through and enter the airflow channel, and to prevent the flow of combusting fluid therebetween.

[0011] In some embodiments, a clamping spring arm is further provided on the side of the exhaust cooling device, and one end of the clamping spring arm extends out of the exhaust cooling device, while the other end of the clamping spring arm is curved and warped.

[0012] In some embodiments, a wiring channel is further included, one side of which is adjacent to the sidewall of the housing, and the other side of which is adjacent to the clamping spring arm.

[0013] In some embodiments, the clamping spring arm is disposed on the side of the first cooling filter and the side of the second cooling filter, or on the side of one of the first cooling filter and the second cooling filter, and one end of the clamping spring arm extends out from the first cooling filter or the second cooling filter.

[0014] In some embodiments, the system further includes a first guide plate and a second guide plate. The first guide plate extends outward along one side of the first opening and is formed extending from the first layer of cooling filter.

[0015] Based on the above, the battery module with exhaust cooling device of this utility model can, in the case of limited internal space, use the first opening and the second opening in an open Brayton cycle method to cool down the high temperature and high concentration of combustible gas inside the battery module and then exhaust it outside the battery module. As long as the concentration and temperature are low enough, the problem of flame burning can be reduced or eliminated. Attached Figure Description

[0016] Figure 1 This is a top view of a first embodiment of the battery module with an exhaust cooling device according to the present invention.

[0017] Figure 2 This is a partial cross-sectional schematic diagram of the first embodiment of the battery module with an exhaust cooling device of the present invention.

[0018] Figure 3 for Figure 2 A schematic diagram of gas flow;

[0019] Figure 4 This is a partial top view of a second embodiment of the battery module with an exhaust cooling device according to the present invention.

[0020] Figure 5 for Figure 4 A schematic diagram of an exhaust cooling device;

[0021] Figure 6 for Figure 4 A partial schematic diagram.

[0022] Explanation of reference numerals in the attached drawings: 1 Battery module; 10 Housing; 100 Exhaust port opening; 20 Exhaust cooling device; 22 First cooling filter; 221 First opening; 24 Second cooling filter; 241 Second opening; 30 Airflow channel; 32 First airflow channel; 34 Second airflow channel; 41 First guide plate; 42 Second guide plate; 50 Clamping spring arm; 60 Circuit channel; 62 Circuit; c Screen hole; d Spacing. Detailed Implementation

[0023] The present invention will now be described based on embodiments, but it is not limited to these embodiments. In the detailed description of the present invention below, certain specific details are described in detail. Those skilled in the art will fully understand the present invention even without these details. To avoid obscuring the essence of the present invention, well-known methods, processes, flows, elements, and circuits are not described in detail. Furthermore, those skilled in the art should understand that the accompanying drawings are for illustrative purposes only and are not necessarily drawn to scale.

[0024] Please see Figure 1 This utility model provides a battery module 1 with an exhaust cooling device. The battery module 1 includes a housing 10 and an exhaust cooling device 20. Figure 1 Although the battery cells are not shown inside the housing 10, there are usually multiple battery cells and battery cell supports inside the housing 10, and the number of battery cells can be adjusted according to needs. This is something that those skilled in the art should understand and can adjust the number of cells themselves.

[0025] Please see Figure 2 and Figure 3 The housing 10 has an exhaust port opening 100 on one side. The exhaust cooling device 20 includes a first cooling filter 22 and a second cooling filter 24. The first cooling filter 22 and the second cooling filter 24 are disposed inside the housing 10 and are located on the same side as the exhaust port opening 100 of the housing 10. The first cooling filter 22 has a first opening 221 on one side, and the second cooling filter 24 has a second opening 241 on one side. The first opening 221 and the second opening 241 are staggered and located on different sides. An airflow channel 30 is formed between the first opening 221, the second opening 241 and the exhaust port opening 100, allowing gas inside the housing 10 to flow out along the airflow channel 30. The airflow channel 30 allows gas to flow in from the first opening 221, flow out from the second opening 241 along the space between the first cooling filter 22 and the second cooling filter 24, and flow out from the exhaust port opening 100.

[0026] like Figure 2 As shown, the first cooling filter 22 and the second cooling filter 24 can be used to filter tar. The tar referred to here is the product generated when the internal high-temperature and high-pressure gas or burning fluid burns the cell support during the thermal runaway of the battery cell inside the battery module 1.

[0027] like Figure 3 As shown, there is a gap d between the first cooling filter 22 and the second cooling filter 24. The size of the gap d can be designed and adjusted according to the requirements to avoid direct contact between the first cooling filter 22 and the second cooling filter 24. The gap d between the layers can effectively ensure smooth airflow. Figure 3The large arrow indicates the direction of gas flow. The airflow channel 30 includes a first airflow channel 32 and a second airflow channel 34. The first airflow channel 32 is located between the first cooling filter 22 and the second cooling filter 24, while the second airflow channel 34 is located between the second cooling filter 24 and the exhaust port opening 100. Thus, as the high-temperature, high-pressure gas flows from the inside towards the first airflow channel 32 and the second airflow channel 34, it simultaneously achieves cooling and pressure reduction by passing through the first and second cooling filters 22 and 24. The first and second cooling filters 22 and 24 are made of metal and each has multiple sieve holes c. The size of these sieve holes c is such that they allow gas to pass through into the first airflow channel 32 or the second airflow channel 34, while preventing the passage of combustible fluids. Generally, due to the good thermal conductivity of metal, not only is strength and wear resistance increased, but it is also more suitable for high-temperature environments. When the battery module 1 overheats or experiences thermal runaway, the high-temperature, high-pressure gas or burning fluid will attempt to escape through these tiny sieve holes c. However, due to the increased thermal conductivity of the metal material, the high-temperature, high-pressure gas or burning fluid will cool rapidly. Therefore, the high-temperature, high-pressure gas or burning fluid can only burn within the first cooling filter 22 and the second cooling filter 24 and cannot spread outside the first cooling filter 22 and the second cooling filter 24.

[0028] In some embodiments, the exhaust cooling device 20 further includes a first guide plate 41 and a second guide plate 42. The first guide plate 41 extends outward along one side of the first opening 221 and is formed by extending from the first cooling filter 22. The second guide plate 42 extends outward along one side of the second opening 241 and is formed by extending from the second cooling filter 24.

[0029] Therefore, within the limited space of the battery module 1, by utilizing the first opening 221 on the first cooling filter 22 and the second opening 241 on the second cooling filter 24 in an open Brayton cycle, the high-temperature and high-pressure combustible gas can be effectively cooled and depressurized during the flow of the gas along the above structure within the battery module 1 before being discharged outside the battery module 1, thus effectively reducing the probability of flames.

[0030] Please see Figure 4 and Figure 5The difference between this embodiment and the first embodiment is that the battery module in this embodiment further includes a clamping spring arm 50 and a wiring channel 60. The same components as in the first embodiment will be represented by the same symbols and will not be described again. The clamping spring arm 50 is located on the side of the exhaust cooling device 20, with one end extending from the exhaust cooling device 20 and the other end curved and warped, forming a flexible structure. One side of the wiring channel 60 is adjacent to the side wall of the housing 10, and the other side of the wiring channel 60 is adjacent to the clamping spring arm 50.

[0031] In some embodiments, the clamping spring arm 50 is disposed on the side of the first cooling filter 22 and the side of the second cooling filter 24, or on the side of one of the first cooling filter 22 and the second cooling filter 24, and one end of the clamping spring arm 50 extends out from the first cooling filter or the second cooling filter.

[0032] Please see Figure 6 Generally, battery modules typically have wiring 62, so through holes or channels are reserved in the design. To facilitate wiring assembly and avoid interference caused by tolerances, the through holes are usually larger than the wiring aperture. However, these through holes could allow high-temperature, high-pressure gases inside to be ejected directly and unprotected to the outside, posing a risk of igniting the external environment. Therefore, the clamping arm 50 in this embodiment is a flexible structure that allows the wiring channel 60 to be narrower and smaller, enabling the battery module's wiring 62 to compactly fill the entire wiring channel 60 and be secured by the clamping arm 50.

[0033] In summary, the battery module with exhaust cooling device of this invention provides a good gas flow path. Tar is first filtered through a double-layered cooling filter (first and second layers), which adsorb the tar and simultaneously lower the gas temperature. Therefore, when thermal runaway occurs in the battery cell, the pressure inside the battery module casing can be reduced simultaneously, and the high-temperature, high-pressure gas can be cooled and discharged, preventing external fires from igniting the battery module.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principle of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery module with an exhaust cooling device, characterized in that, include: A housing, wherein a vent opening is provided on one side of the housing; and An exhaust cooling device includes a first cooling filter and a second cooling filter. The first cooling filter and the second cooling filter are disposed inside the housing and are on the same side as the exhaust port opening of the housing. A first opening is provided on one side of the first cooling filter and a second opening is provided on one side of the second cooling filter. The first opening and the second opening are staggered and located on different sides. The first opening, the second opening, and the exhaust port opening form an airflow channel, allowing the gas inside the housing to flow out along the airflow channel.

2. The battery module with an exhaust cooling device according to claim 1, characterized in that, There is a gap between the first layer of cooling filter and the second layer of cooling filter.

3. The battery module with an exhaust cooling device according to claim 1, characterized in that, The airflow channel provides the gas to flow in from the first opening, flow out from the second opening along the space between the first layer of cooling filter and the second layer of cooling filter, and flow out from the exhaust port opening.

4. The battery module with an exhaust cooling device according to claim 1, characterized in that, The airflow channel includes a first airflow channel and a second airflow channel. The first airflow channel is located between the first layer of cooling filter and the second layer of cooling filter, and the second airflow channel is located between the second layer of cooling filter and the exhaust port opening.

5. The battery module with an exhaust cooling device according to claim 1, characterized in that, Both the first and second cooling filters are made of metal.

6. The battery module with an exhaust cooling device according to claim 1, characterized in that, Also includes: Multiple sieve holes are provided on the first layer of cooling filter and the second layer of cooling filter. The size of the multiple sieve holes is such that gas can pass through the multiple sieve holes and enter the airflow channel, and the size is such that the burning fluid cannot pass through the sieve holes.

7. The battery module with an exhaust cooling device according to claim 1, characterized in that, It also includes a clamping spring arm, which is located on the side of the exhaust cooling device, and one end of the clamping spring arm extends out from the exhaust cooling device, while the other end of the clamping spring arm is curved and warped.

8. The battery module with an exhaust cooling device according to claim 7, characterized in that, It also includes a wiring channel, one side of which is adjacent to the side wall of the housing, and the other side of which is adjacent to the clamping spring arm.

9. The battery module with an exhaust cooling device according to claim 7, characterized in that, The clamping spring arm is located on the side of the first cooling filter and the side of the second cooling filter, or on the side of one of the first cooling filter and the second cooling filter, and one end of the clamping spring arm extends out from the first cooling filter or the second cooling filter.

10. The battery module with an exhaust cooling device according to claim 1, characterized in that, include: A first guide plate is provided to extend outward along one side of the first opening, and the first guide plate is formed by extending from the first layer of cooling filter screen; as well as A second guide plate is provided, extending outward along one side of the second opening, and the second guide plate is formed by extending from the second layer of cooling filter.

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