Thermal management apparatus, battery pack, and electric device

Abstract

Provided in the present application are a thermal management apparatus, a battery pack, and an electric device, the thermal management apparatus comprising a box and a tray. The box comprises a frame and a bottom guard plate, wherein the inner wall of the frame is provided with a first pressure relief opening, the outer wall of the frame is provided with a second pressure relief opening, and the inside of the frame is provided with a pressure relief channel, both the first pressure relief opening and the second pressure relief opening being in communication with the pressure relief channel. A filter element is provided at the first pressure relief opening. The tray is provided with first exhaust ports, both the first pressure relief opening and the first exhaust ports being in communication with a pressure relief chamber.

Description

Thermal management devices, battery packs and electrical equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 16, 2023, with application number 202323101859.5. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a thermal management device, a battery pack, and an electrical device. Background Art

[0003] The battery pack is the core power source of electric vehicles. When the battery pack experiences abnormal phenomena such as thermal runaway of the battery cells, the temperature and pressure inside the battery pack rise sharply and a large amount of gas is discharged. To avoid thermal runaway of the entire battery pack, the gas inside the battery pack needs to be discharged quickly.

[0004] Battery packs in related technologies usually use openings on the crossbeam to discharge the gas generated by thermal runaway of the battery cells to the outside of the explosion-proof valve of the box. In order to prevent the material ejected from the thermal runaway of the battery cells from clogging the pressure relief port of the crossbeam, the size of the pressure relief port needs to be limited to a smaller size. This setting method is likely to cause poor pressure relief, resulting in the bottom protective plate of the battery pack being destroyed by the high-pressure gas, and then causing thermal runaway of the entire battery pack. SUMMARY OF THE INVENTION

[0005] The present application provides a thermal management device, a battery pack, and an electrical device, aiming to solve the problem of poor pressure relief in the battery pack in the related art.

[0006] The present application provides a thermal management device, a battery pack, and an electrical device, which can achieve normal and smooth pressure relief of the battery pack.

[0007] In the first aspect, an embodiment of the present application provides a thermal management device, comprising: a box body and a tray arranged on the box body, the box body comprising a frame and a bottom guard plate, the inner wall of the frame is provided with a first pressure relief port, the outer wall of the frame is provided with a second pressure relief port, a pressure relief channel is provided inside the frame, the first pressure relief port and the second pressure relief port are both connected to the pressure relief channel, a filter element is provided at the first pressure relief port, an explosion-proof valve is provided at the second pressure relief port, a pressure relief chamber is enclosed by the tray, the frame and the bottom guard plate, the tray is provided with a first exhaust port, the first pressure relief port and the first exhaust port are both connected to the pressure relief chamber.

[0008] In one embodiment, the filter element includes a filter plate and a protrusion disposed on the filter plate, wherein the protrusion is disposed on a side of the filter plate away from the first pressure relief port.

[0009] In one embodiment, the raised portion is a curved raised portion, one end of which is connected to the filter plate, and the other end of which forms a second exhaust port with the filter plate, and the second exhaust port is connected to the pressure relief chamber and the first pressure relief port.

[0010] In one embodiment, the curvature of the curved surface raised portion is greater than or equal to 90°, and the curvature of the curved surface raised portion is less than 180°.

[0011] In one embodiment, the opening area of ​​the first pressure relief port is 1000 mm 2 ~2250mm 2 .

[0012] In one embodiment, the area of ​​the raised portion on the filter plate accounts for 50% to 80%.

[0013] In one embodiment, the opening radius of the second exhaust port is 3 mm to 4 mm, and the opening height of the second exhaust port is 1 mm to 2 mm.

[0014] In one embodiment, the protrusions include a plurality of protrusions, and the plurality of protrusions are arranged along the length direction and the width direction of the filter plate.

[0015] In one embodiment, the frame includes a first crossbeam, a second crossbeam and two third crossbeams arranged opposite to each other, the two ends of the third crossbeams are respectively connected to the first crossbeam and the second crossbeam, the first pressure relief port is arranged on the inner wall of the third crossbeam, and the second pressure relief port is arranged on the outer wall of the first crossbeam.

[0016] In one embodiment, a first pressure relief port is provided on each of the two third crossbeams, and the first pressure relief port is provided at an end of the third crossbeam away from the first crossbeam.

[0017] In one embodiment, the first crossbeam and the two third crossbeams are hollow, the internal spaces of the two third crossbeams are connected to the internal space of the first crossbeam, and the internal spaces of the first crossbeam and the two third crossbeams together form the pressure relief channel.

[0018] In one embodiment, the tray includes a tray bottom plate and side plates arranged around the tray bottom plate, the side plates are perpendicular to the tray bottom plate, and the side plates and the tray bottom plate together form a first accommodation space, the first accommodation space is configured to accommodate battery cells, and the first exhaust port is arranged on the tray bottom plate.

[0019] In a second aspect, an embodiment of the present application provides a battery pack, which includes the thermal management device described in the first aspect above.

[0020] In one embodiment, it further includes a battery cell and a top cover, wherein the battery cell is arranged on the first exhaust port, and the top cover is arranged on the box body, and the top cover and the box body are combined to form a second accommodation space, and the second accommodation space is configured to accommodate the battery cell and the tray.

[0021] In a third aspect, an embodiment of the present application provides an electrical device, which includes the battery pack described in the second aspect above. Beneficial effects

[0022] Beneficial effects of this application:

[0023] The thermal management device of the present application can filter the substances ejected by thermal runaway of the battery cell by setting a filter element at the first pressure relief port, thereby preventing the substances ejected by thermal runaway of the battery cell from clogging the first pressure relief port, thereby achieving normal and smooth pressure relief of the battery pack; in addition, since the first pressure relief port will not be blocked by the substances ejected by thermal runaway of the battery cell, the first pressure relief port can be set larger than the pressure relief port of the battery pack in the related art, thereby increasing the exhaust speed of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is an exploded schematic diagram of a thermal management device provided in an embodiment of the present application;

[0025] FIG2 is a schematic structural diagram of a frame for setting a filter element according to an embodiment of the present application;

[0026] FIG3 is a schematic structural diagram of a frame without a filter element provided in an embodiment of the present application;

[0027] FIG4 is a schematic structural diagram of a filter element provided in an embodiment of the present application;

[0028] FIG5 is a schematic structural diagram of a tray provided in an embodiment of the present application;

[0029] FIG6 is an exploded schematic diagram of a battery pack provided in an embodiment of the present application.

[0030] The following are the descriptions of the reference numerals:

[0031] 100, box body; 200, tray; 300, filter element; 400, explosion-proof valve; 500, battery cell; 600, top cover; 110, frame; 120, bottom guard plate; 130, first pressure relief port; 140, second pressure relief port; 210, first exhaust port; 220, tray bottom plate; 230, side plate; 310, filter plate; 320, raised portion; 330, second exhaust port; 111, first crossbeam; 112, second crossbeam; 113, third crossbeam. Modes for Carrying Out the Invention

[0032] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower level than the second feature. In the description of this embodiment, the terms "above," "below," "left," and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and do not have any special meaning.

[0034] After research, the inventor found that the battery pack of related technology usually uses an opening on the crossbeam to discharge the gas generated by thermal runaway to the outside of the explosion-proof valve of the box. In order to prevent the material ejected from the battery cell from clogging the pressure relief port of the crossbeam, the size of the pressure relief port needs to be limited to a smaller size. This setting method has at least the following problems: ① The small size of the pressure relief port leads to large flow resistance, which easily causes the pressure relief to be not smooth, causing the bottom protective plate of the battery pack to be destroyed by the high-pressure gas, and then causing the entire battery pack to thermal runaway; ② The material ejected from the thermal runaway of the battery cell can easily block the pressure relief port, resulting in not smooth pressure relief; ③ Setting a smaller pressure relief port on the crossbeam makes the process difficult to implement and the process efficiency is low.

[0035] In order to solve the above problems, as shown in Figures 1 to 5, this embodiment provides a thermal management device, which includes: a box body 100 and a tray 200 arranged on the box body 100, the box body 100 includes a frame 110 and a bottom guard plate 120, the inner wall of the frame 110 is provided with a first pressure relief port 130, the outer wall of the frame 110 is provided with a second pressure relief port 140, the interior of the frame 110 is provided with a pressure relief channel, the first pressure relief port 130 and the second pressure relief port 140 are both connected to the pressure relief channel, a filter element 300 is provided at the first pressure relief port 130, and an explosion-proof valve 400 is provided at the second pressure relief port 140, a pressure relief chamber is enclosed by the tray 200, the frame 110 and the bottom guard plate 120, the tray 200 is provided with a first exhaust port 210, and the first pressure relief port 130 and the first exhaust port 210 are both connected to the pressure relief chamber.

[0036] Specifically, when an abnormal phenomenon such as thermal runaway of the battery cell occurs in the battery pack, the gas can pass through the first exhaust port 210 to the pressure relief chamber, and then from the pressure relief chamber through the first pressure relief port 130 to the pressure relief channel, and finally from the pressure relief channel through the second pressure relief port 140 to be discharged outside the box body 100. Since the filter element 300 provided at the first pressure relief port 130 can filter the substances ejected by the thermal runaway of the battery cell, the first pressure relief port 130 is prevented from being blocked, so that the battery pack can be normally and smoothly depressurized. In addition, since the first pressure relief port 130 will not be blocked, the first pressure relief port 130 can be set larger than the pressure relief port of the battery pack in the related art, thereby increasing the exhaust speed of the battery pack; in addition, since there is no need to set a smaller pressure relief port on the beam, the process is easy to implement and the process efficiency is high.

[0037] In some embodiments, the opening area of ​​the first pressure relief port 130 can be set to 1000 mm 2 ~2250mm 2 The specific value is determined according to the thermal runaway exhaust data of the single cell in the battery pack. For example, the size of the first pressure relief vent 130 is 150mm×15mm, 100mm×10mm, 150mm×10mm, 100mm×15mm, etc. By setting the opening area of ​​the first pressure relief vent 130 within this range, it is possible to avoid not only the first pressure relief vent 130 being set too large and affecting the mechanical strength of the frame 110, but also the first pressure relief vent 130 being set too small and causing poor pressure relief.

[0038] In some embodiments, the filter element 300 is formed by die stamping. Because the filter element 300 can be continuously processed using the die, the process is easy to implement and highly efficient. The sheet metal thickness used in die stamping is 0.2-0.3 mm. The filter element 300 produced at this sheet metal thickness has high mechanical strength and high temperature resistance, not only capable of filtering substances ejected during thermal runaway of the battery cell, but also preventing flames from escaping the housing 100 and causing a greater safety incident.

[0039] In some embodiments, a first mounting hole is provided on the inner wall of the frame 110 near the first pressure relief port 130, and a second mounting hole is provided on the filter element 300. The filter element 300 is installed on the first pressure relief port 130 through the first mounting hole, the second mounting hole and the rivet. The installation is convenient and quick, and the first mounting hole, the second mounting hole and the rivet can firmly fix the filter element 300 on the first pressure relief port 130 to prevent the filter element 300 from loosening and causing the first pressure relief port 130 to be blocked.

[0040] In some embodiments, as shown in Figures 2 and 4, the filter element 300 includes a filter plate 310 and a protrusion 320 provided on the filter plate 310. The protrusion 320 is provided on the side of the filter plate 310 away from the first pressure relief port 130. By providing the protrusion 320 on the side of the filter plate 310 away from the first pressure relief port 130, the core and other materials ejected by the battery cell due to thermal runaway can be blocked on the side of the filter plate 310 away from the first pressure relief port 130, thereby preventing the materials ejected by the battery cell due to thermal runaway from clogging the first pressure relief port 130 and achieving normal and smooth pressure relief of the battery pack.

[0041] In some embodiments, the area ratio of the protrusion 320 on the filter plate 310 is 50% to 80%, that is, the protrusion 320 is provided on 50% to 80% of the area on the side of the filter plate 310 away from the first pressure relief port 130. For example, the protrusion 320 is provided on 65% of the area on the side of the filter plate 310 away from the first pressure relief port 130. Setting the area ratio of the protrusion 320 within this range can not only ensure the rigidity of the filter plate 310, but also ensure the normal and smooth pressure relief of the battery pack.

[0042] In some embodiments, continuing to refer to Figures 2 and 4, the raised portion 320 is a curved raised portion, one end of the curved raised portion is connected to the filter plate, and the other end of the curved raised portion forms a second exhaust port 330 with the filter plate. The second exhaust port 330 is connected to the pressure relief chamber and the first pressure relief port 130. By forming the second exhaust port 330 between the curved raised portion and the filter plate, not only can the material ejected due to thermal runaway of the battery cell be blocked on the side of the filter plate 310 away from the first pressure relief port 130, but the gas generated by thermal runaway of the battery cell can also enter the pressure relief channel through the second exhaust port 330 and the first pressure relief port 130, thereby achieving normal and smooth pressure relief of the battery pack.

[0043] In some embodiments, the opening radius of the second exhaust port 330 is 3 mm to 4 mm, and the opening height of the second exhaust port 330 is 1 mm to 2 mm, wherein the projection of the second exhaust port 330 on the filter plate 310 is a semicircle, the opening radius refers to the radius of the semicircle, and the opening height refers to the distance between the end of the opening away from the filter plate and the filter plate 310. For example, the opening radius of the second exhaust port 330 is 3.6 mm, and the opening height of the second exhaust port 330 is 1.5 mm. By setting the opening radius and opening height of the second exhaust port 330 within this range, not only can the core and other materials ejected by the thermal runaway of the battery cell be blocked on the side of the filter plate 310 away from the first pressure relief port 130, but also the normal and smooth pressure relief of the battery pack can be ensured.

[0044] In some embodiments, in order to prevent the material ejected from the battery cell during thermal runaway from clogging the first pressure relief port 130, the curvature of the curved raised portion is greater than or equal to 90°. However, in order to form the second exhaust port 330, the curvature of the curved raised portion needs to be less than 180°. For example, the curvature of the curved raised portion can be 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc.

[0045] Continuing with reference to FIG4 , in a specific embodiment, the arc angle of the curved raised portion is 90°. This arrangement not only ensures that the raised portion 320 filters substances ejected from the battery cell due to thermal runaway, but also maximizes the opening size of the second exhaust port 330, thereby achieving normal and smooth pressure relief of the battery pack.

[0046] In some embodiments, continuing with reference to FIG4 , the protrusion 320 includes a plurality of protrusions 320, and the plurality of protrusions 320 are arranged along the length and width directions of the filter plate 310. For example, as shown in FIG4 , the plurality of protrusions 320 are arranged equidistantly along the length and width directions of the filter plate 310 to form an array. By providing the plurality of protrusions 320, not only can the material ejected due to thermal runaway of the battery cell be prevented from clogging the first pressure relief port 130, but also normal and smooth pressure relief of the battery pack can be achieved.

[0047] In some embodiments, multiple second mounting holes are provided on the filter plate 310 . For example, referring to FIG. 4 , three second mounting holes are provided on the filter plate 310 , and the three second mounting holes are evenly distributed on the filter plate 310 .

[0048] In some embodiments, as shown in FIG3 , the frame 110 includes a first crossbeam 111, a second crossbeam 112, and two third crossbeams 113 disposed opposite each other. The first crossbeam 111 and the second crossbeam 112 are disposed opposite each other, and the ends of the two third crossbeams 113 are respectively connected to the first crossbeam 111 and the second crossbeam 112. For example, the first crossbeam 111 and the second crossbeam 112 can be the front crossbeam and the rear crossbeam of the frame 110, respectively, and the two third crossbeams 113 can be the side crossbeams of the frame 110.

[0049] In some embodiments, the first pressure relief vent 130 is disposed on the inner sidewall of the third crossbeam 113, and the second pressure relief vent 140 is disposed on the outer sidewall of the first crossbeam 111. For example, when the first crossbeam 111 and the second crossbeam 112 are the front and rear crossbeams of the frame 110, respectively, and the third crossbeam 113 is a side crossbeam of the frame 110, the first pressure relief vent 130 is disposed on the inner sidewall of the side crossbeam, and the second pressure relief vent 140 is disposed on the outer sidewall of the front crossbeam.

[0050] In some embodiments, a first pressure relief port 130 is provided on each of the two third beams 113. The number of the first pressure relief ports 130 on the two third beams 113 can be set as needed. For example, one first pressure relief port 130 is provided on each of the two third beams 113, two first pressure relief ports 130 are provided on each of the two third beams 113, three first pressure relief ports 130 are provided on each of the two third beams 113, etc. By providing the first pressure relief port 130 on both of the third beams 113, the gas in the battery pack can be discharged out of the box 100 more quickly when abnormal phenomena such as thermal runaway of the battery cells occur in the battery pack.

[0051] Of course, in this embodiment, multiple second pressure relief vents 140 can also be provided. The multiple second pressure relief vents 140 can be all provided on the outer wall of the first crossbeam 111, or they can be provided separately on the outer wall of the first crossbeam 111 and the outer wall of the second crossbeam 112. Then, the gas entering the pressure relief channel can be discharged outside the box body 100 through the multiple second pressure relief vents 140, thereby increasing the exhaust speed of the battery pack. For example, two second pressure relief vents 140 can be provided, and the two second pressure relief vents 140 can be provided on the outer wall of the first crossbeam 111 and the outer wall of the second crossbeam 112 respectively.

[0052] In some embodiments, the first beam 111 and the two third beams 113 are hollow, the interior spaces of the two third beams 113 are connected to the interior space of the first beam 111, and the interior spaces of the first beam 111 and the two third beams 113 together form a pressure relief channel.

[0053] In some embodiments, continuing with reference to FIG3 , the first pressure relief port 130 is disposed at an end of the third beam 113 away from the first beam 111. In other words, the first pressure relief port 130 is disposed at an end of the third beam 113 close to the second beam 112. By disposing the first pressure relief port 130 at an end of the third beam 113 away from the first beam 111, the pressure relief channel can be made as long as possible to discharge the gas in the battery pack out of the box body 100 faster.

[0054] In some embodiments, a first pressure relief port 130 is provided on both third beams 113 , and the orthographic projection of the first pressure relief port 130 provided on the inner side wall of one of the third beams 113 on the other third beam 113 partially or completely overlaps with the first pressure relief port 130 provided on the inner side wall of the other third beam 113 .

[0055] In other embodiments, the first pressure relief port 130 is provided on both third beams 113 , and the orthographic projection of the first pressure relief port 130 provided on the inner side wall of one of the third beams 113 on the other third beam 113 does not overlap with the first pressure relief port 130 provided on the inner side wall of the other third beam 113 .

[0056] In some embodiments, as shown in Figures 5 and 6, the tray 200 includes a tray bottom plate 220 and side panels 230 arranged around the tray bottom plate 220. The side panels 230 are perpendicular to the tray bottom plate 220. The side panels 230 and the tray bottom plate 220 together form a first accommodation space. The first accommodation space is configured to accommodate the battery cell 500, and the first exhaust port 210 is set on the tray bottom plate 220.

[0057] In some embodiments, the shape of the first exhaust port 210 is the same as that of the battery cell 500 . For example, when the battery pack is a cylindrical battery pack, the shape of the battery cell 500 is cylindrical, and the shape of the first exhaust port 210 is circular.

[0058] Furthermore, the tray bottom plate 220 is provided with a plurality of first exhaust ports 210. The battery pack includes a plurality of battery cells 500. The plurality of battery cells 500 correspond one-to-one to the plurality of first exhaust ports 210, and each battery cell 500 is provided on its corresponding first exhaust port 210. In other words, the arrangement of the plurality of first exhaust ports 210 is the same as the arrangement of the plurality of battery cells 500. For example, as shown in FIG5 , the center point of each of the plurality of first exhaust ports 210 and the line connecting the center points of two adjacent first exhaust ports 210 form an equilateral triangle.

[0059] In some embodiments, the bottom guard plate 120 is connected to the frame 110 by bolts. In order to improve the ability of the bottom guard plate 120 to resist deformation, the bottom guard plate 120 in this embodiment can be made of steel plate. The melting point and mechanical strength of steel material are relatively high, and it is not easily broken under high temperature conditions.

[0060] This embodiment also provides a battery pack, as shown in Figure 6, which includes the above-mentioned thermal management device. By setting a filter element 300 at the first pressure relief port 130, the battery pack can filter the substances ejected by the battery cell 500 due to thermal runaway, thereby preventing the substances ejected by the battery cell 500 from thermal runaway from clogging the first pressure relief port 130, thereby achieving normal and smooth pressure relief of the battery pack; in addition, since the first pressure relief port 130 will not be blocked by the substances ejected by the battery cell 500 due to thermal runaway, the first pressure relief port 130 can be set larger than the pressure relief port of the battery pack in the related art, thereby increasing the exhaust speed of the battery pack.

[0061] In some embodiments, continuing with reference to FIG6 , the battery pack further includes a plurality of battery cells 500 , and the plurality of battery cells 500 correspond one-to-one to the plurality of first exhaust ports 210 , and each battery cell 500 is disposed on its corresponding first exhaust port 210 . When thermal runaway occurs in the battery cell 500 , the gas generated by the thermal runaway of the battery cell 500 can enter the pressure relief chamber through the corresponding first exhaust port 210 , and then enter the pressure relief channel from the pressure relief chamber through the first pressure relief port 130 , thereby achieving normal and smooth pressure relief of the battery pack.

[0062] In some embodiments, continuing with reference to FIG6 , the battery pack further includes a top cover 600, which is disposed on the case body 100. The top cover 600 and the case body 100 are combined to form a second accommodation space, and the second accommodation space is configured to accommodate the battery cells 500 and the tray 200. By arranging the battery cells 500 and the tray 200 in the second accommodation space formed by the top cover 600 and the case body 100, damage to the battery cells 500 can be avoided, thereby improving the service life of the battery pack.

[0063] This embodiment also provides an electrical device, which includes the above-mentioned battery pack. The battery pack used in the electrical device can filter the substances ejected by the battery cell 500 due to thermal runaway by setting a filter element 300 at the first pressure relief port 130, thereby preventing the substances ejected by the battery cell 500 due to thermal runaway from clogging the first pressure relief port 130, achieving normal and smooth pressure relief of the battery pack, avoiding thermal runaway of the entire battery pack, and improving the safety of the electrical device.

Claims

1. A thermal management device, include: A box body (100) and a tray (200) arranged on the box body (100), the box body (100) comprising a frame (110) and a bottom guard plate (120), the inner wall of the frame (110) being provided with a first pressure relief port (130), the outer wall of the frame (110) being provided with a second pressure relief port (140), a pressure relief channel being arranged inside the frame (110), the first pressure relief port (130) and the second pressure relief port (140) both being in communication with the pressure relief channel, a filter element (300) being arranged at the first pressure relief port (130), an explosion-proof valve (400) being arranged at the second pressure relief port (140), a pressure relief cavity being enclosed by the tray (200), the frame (110) and the bottom guard plate (120), the tray (200) being provided with a first exhaust port (210), the first pressure relief port (130) and the first exhaust port (210) both being in communication with the pressure relief cavity.

2. The thermal management device according to claim 1, in, The filter element (300) comprises a filter plate (310) and a protrusion (320) arranged on the filter plate (310); the protrusion (320) is arranged on a side of the filter plate (310) away from the first pressure relief port (130).

3. The thermal management device according to claim 2, in, The raised portion (320) is a curved raised portion, one end of which is connected to the filter plate (310), and the other end of which forms a second exhaust port (330) with the filter plate (310), the second exhaust port (330) being in communication with the pressure relief chamber and the first pressure relief port (130).

4. The thermal management device according to claim 3, in, The curvature of the curved surface raised portion is greater than or equal to 90°, and the curvature of the curved surface raised portion is less than 180°.

5. The thermal management device according to claim 1, in, The opening area of ​​the first pressure relief port (130) is 1000 mm 2 ~2250mm 2 .

6. The thermal management device according to claim 2, in, The area of ​​the protrusion (320) on the filter plate (310) accounts for 50% to 80%.

7. The thermal management device according to claim 3, in, The opening radius of the second exhaust port (330) is 3 mm to 4 mm, and the opening height of the second exhaust port (330) is 1 mm to 2 mm.

8. The thermal management device according to claim 2, in, The protrusions (320) include a plurality of protrusions (320), and the plurality of protrusions (320) are arranged along the length direction and the width direction of the filter plate (310).

9. The thermal management device according to claim 1, in, The frame (110) comprises a first crossbeam (111), a second crossbeam (112), and two third crossbeams (113) arranged opposite to each other; the first crossbeam (111) and the second crossbeam (112) are arranged opposite to each other; two ends of the two third crossbeams (113) are respectively connected to the first crossbeam (111) and the second crossbeam (112); the first pressure relief port (130) is arranged on the inner side wall of the third crossbeam (113); and the second pressure relief port (140) is arranged on the outer side wall of the first crossbeam (111).

10. The thermal management device according to claim 9, in, The two third cross beams (113) are each provided with a first pressure relief port (130), and the first pressure relief port (130) is provided at an end of the third cross beam (113) away from the first cross beam (111).

11. The thermal management device according to claim 9, in, The first crossbeam (111) and the two third crossbeams (113) are both hollow, the internal spaces of the two third crossbeams (113) are both connected to the internal space of the first crossbeam (111), and the internal spaces of the first crossbeam (111) and the two third crossbeams (113) together form the pressure relief channel.

12. The thermal management device according to any one of claims 1 to 11, in, The tray (200) comprises a tray bottom plate (220) and a side plate (230) arranged around the tray bottom plate (220), the side plate (230) being perpendicular to the tray bottom plate (220), the side plate (230) and the tray bottom plate (220) enclosing a first accommodation space, the first accommodation space being configured to accommodate a battery cell (500), and the first exhaust port (210) being arranged on the tray bottom plate (220).

13. A battery pack comprising the thermal management device according to any one of claims 1 to 12.

14. The battery pack according to claim 13, further comprising a battery cell (500) and a top cover (600), wherein the battery cell (500) is disposed on the first exhaust port (210), and the top cover (600) is disposed on the box body (100), and the top cover (600) and the box body (100) are combined to form a second accommodation space, and the second accommodation space is configured to accommodate the battery cell (500) and the tray (200).

15. An electrical device comprising the battery pack according to claim 13 or 14.

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