Ultrathin vapor chamber with pressure relief structure

Abstract

The utility model relates to the technical field of ultrathin vapor chambers, in particular to an ultrathin vapor chamber with a pressure relief structure. Comprising a shell, the shell comprises a first shell plate and a second shell plate, the second shell plate is installed on the first shell plate, and a reinforcing assembly used for reinforcing the shell is installed on the side, away from the first shell plate, of the second shell plate; a first groove is formed in the side, close to the second shell plate, of the first shell plate. According to the vapor chamber, through the arrangement of the second reinforcing rib and the fourth reinforcing rib, the first pressure relief groove and the second pressure relief groove are connected through the second reinforcing rib and the fourth reinforcing rib, the stability of the pressure relief groove structure is enhanced, and the vapor chamber is enabled to be stable under long-time or high-load operation. And the first pressure relief groove and the second pressure relief groove are not easy to deform under the influence of the external environment, so that the use stability of the vapor chamber is improved, and the safety problem is not easy to cause.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultra-thin vapor chambers, and in particular relates to an ultra-thin vapor chamber with a pressure relief structure. Background Art

[0002] Since new energy vehicles began to enter the market, their safety issues have been controversial, especially heat-sensitive devices such as lithium batteries, which are prone to thermal runaway during high-speed driving. Generally speaking, the SEI film of lithium batteries will decompose at 60°C, and irreversible decomposition and damage will occur at 90°C, and the overall temperature of the battery will rise rapidly to 120°C at an uncontrollable speed, approaching the danger of fire. With the gradual entry of phase change devices into the battery heat dissipation industry in recent years, battery heat dissipation performance has a new reliance, and fast temperature uniformity and thermal conductivity are undoubtedly the best choice for battery temperature control.

[0003] After searching, in the prior art, Chinese patent application number: CN202222881644.9 discloses an ultra-thin heat spreader with a pressure relief structure, including a shell plate of the heat spreader, and a pressure relief structure with a thinned thickness is provided on at least one shell plate, and the location where the thickness is thinned is the pressure relief zone. The principle of this utility model is to form a site with a thinned thickness on the shell plate. At this time, when the pressure in the heat spreader increases and reaches a critical point, the high-pressure gas can be preferentially ejected from the pressure relief zone with a thinned thickness, thereby protecting the battery. This utility model effectively avoids the premature explosion of the battery caused by the explosion of the heat spreader first when the battery is thermally runaway by creating surface defects on the heat spreader, and is the last line of defense for the safety of phase change heat dissipation batteries.

[0004] But the device still has the following defects:

[0005] The thickness of the ultra-thin heat spreader is relatively thin, and the ultra-thin heat spreader is even weaker in the pressure relief area. If the pressure relief mechanism does not work properly, the bottom of the pressure relief area may be deformed due to the influence of the external environment under long-term or high-load operation, which may easily cause safety problems. Utility Model Content

[0006] The purpose of the utility model is to provide an ultra-thin heat spreader with a pressure relief structure. By setting the second reinforcing rib and the fourth reinforcing rib, the stability of the pressure relief groove structure can be effectively enhanced, so that when the heat spreader is operated for a long time or under high load, the first pressure relief groove and the second pressure relief groove are not easily deformed under the influence of the external environment, thereby improving the stability of the heat spreader in use and not easily causing safety problems, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the utility model provides the following technical solution: an ultra-thin heat spreader with a pressure relief structure, comprising a shell, the shell comprising a first shell plate and a second shell plate, the second shell plate being mounted on the first shell plate, and a reinforcement component for reinforcing the shell being mounted on a side of the second shell plate away from the first shell plate;

[0008] A first groove is provided on one side of the first shell plate close to the second shell plate, and a plurality of first pressure relief grooves are provided in the first groove. A second groove is provided on one side of the second shell plate close to the first shell plate, and a cavity is formed between the first groove and the second groove. A liquid wick and a working medium are arranged in the cavity, and the interior of the cavity is in a vacuum state. A plurality of second pressure relief grooves are provided in the second groove, and the plurality of first pressure relief grooves and the second pressure relief grooves are respectively arranged at the edges around the first groove and the second groove, and the plurality of first pressure relief grooves and the second pressure relief grooves are symmetrically arranged, and the plurality of first pressure relief grooves are all installed with second reinforcing ribs, and the plurality of second pressure relief grooves are all installed with fourth reinforcing ribs, and the ends of the plurality of second reinforcing ribs away from the first pressure relief grooves are respectively installed at the ends of the plurality of fourth reinforcing ribs away from the second pressure relief grooves.

[0009] Furthermore, a plurality of groups of first reinforcing ribs are installed at the bottom of the first groove, a plurality of groups of third reinforcing ribs are installed inside the second groove, and ends of the plurality of groups of first reinforcing ribs away from the first groove are respectively installed at ends of the third reinforcing ribs away from the second groove.

[0010] Furthermore, the plurality of groups of the first reinforcing ribs and the second reinforcing ribs are equidistantly arranged, and the third reinforcing ribs and the fourth reinforcing ribs are equidistantly arranged.

[0011] Furthermore, a first connecting edge is formed on the edge of the first groove, and a second connecting edge is formed on the edge of the second groove.

[0012] Furthermore, multiple groups of the first reinforcing ribs and the second reinforcing ribs are all at the same height as the first connecting edge, and multiple groups of the third reinforcing ribs and the fourth reinforcing ribs are all at the same height as the second connecting edge.

[0013] Furthermore, the depths of the first groove and the second groove are respectively half of the thickness of the first shell plate and the second shell plate, and the depths of the plurality of groups of the first pressure relief grooves and the second pressure relief grooves are respectively half of the depths of the first groove and the second groove.

[0014] Furthermore, the reinforcement assembly includes a reinforcement plate, which is installed on a side of the second shell plate away from the first shell plate, and has multiple groups of third pressure relief grooves, which are respectively on the same vertical line with the multiple groups of second pressure relief grooves.

[0015] The beneficial effects of the utility model are:

[0016] The utility model connects the first pressure relief groove and the second pressure relief groove by setting the second reinforcing rib and the fourth reinforcing rib, thereby enhancing the stability of the pressure relief groove structure. When the heat spreader is operated for a long time or under high load, the first pressure relief groove and the second pressure relief groove are not easily deformed under the influence of the external environment, thereby improving the stability of the heat spreader and not easily causing safety problems.

[0017] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure according to an embodiment of the utility model is shown;

[0020] Figure 2 A schematic diagram of the second shell plate structure according to an embodiment of the utility model is shown;

[0021] Figure 3 A schematic diagram of the first shell plate structure according to an embodiment of the utility model is shown;

[0022] Figure 4 A schematic diagram of the reinforcement plate structure according to an embodiment of the utility model is shown.

[0023] In the figure: 110, first shell plate; 120, first groove; 130, first pressure relief groove; 140, first connecting edge; 150, first reinforcing rib; 160, second reinforcing rib; 210, second shell plate; 220, second groove; 230, second pressure relief groove; 240, second connecting edge; 250, third reinforcing rib; 260, fourth reinforcing rib; 310, reinforcement plate; 320, third pressure relief groove. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution: an ultra-thin heat sink with a pressure relief structure. The shell includes a first shell plate 110 and a second shell plate 210, the second shell plate 210 is installed on the first shell plate 110, and a reinforcement component for reinforcing the shell is installed on the side of the second shell plate 210 away from the first shell plate 110;

[0026] A first groove 120 is provided on one side of the first shell plate 110 close to the second shell plate 210, and a plurality of first pressure relief grooves 130 are provided in the first groove 120. A second groove 220 is provided on one side of the second shell plate 210 close to the first shell plate 110, and a cavity is formed between the first groove 120 and the second groove 220. A liquid wick and a working medium are arranged in the cavity, and the interior of the cavity is in a vacuum state. A plurality of second pressure relief grooves 230 are provided in the second groove 220, and the plurality of first pressure relief grooves 230 are provided in the plurality of first pressure relief grooves 230. The groove 130 and the second pressure relief groove 230 are respectively arranged at the edges of the first groove 120 and the second groove 220, and multiple groups of the first pressure relief grooves 130 and the second pressure relief grooves 230 are symmetrically arranged, multiple groups of the first pressure relief grooves 130 are all installed with second reinforcing ribs 160, multiple groups of the second pressure relief grooves 230 are all installed with fourth reinforcing ribs 260, and the ends of multiple groups of the second reinforcing ribs 160 away from the first pressure relief grooves 130 are respectively installed at the ends of multiple groups of fourth reinforcing ribs 260 away from the second pressure relief grooves 230.

[0027] A second reinforcing rib 160 and a fourth reinforcing rib 260 are provided in the first pressure relief groove 130 and the second pressure relief groove 230 to support the first pressure relief groove 130 and the second pressure relief groove 230, and enhance the stability of the first pressure relief groove 130 and the second pressure relief groove 230, so that the first pressure relief groove 130 and the second pressure relief groove 230 are not easily deformed under the influence of the external environment when the heat spreader is operated for a long time or under high load, thereby improving the stability of the use of the heat spreader and not easily causing safety problems. By providing multiple groups of first pressure relief grooves 130 and second pressure relief grooves 230, multiple pressure relief channel designs are provided to disperse the pressure and reduce the pressure borne by a single point. The first shell plate 110, the second shell plate 210 and the reinforcement assembly are all made of materials with excellent mechanical properties such as metal alloys and composite materials. The pressure relief structure is made of high-strength and high-toughness materials to ensure that it is not easy to deform or rupture when subjected to high pressure.

[0028] A plurality of first reinforcing ribs 150 are installed at the bottom of the first groove 120, and a plurality of third reinforcing ribs 250 are installed inside the second groove 220. The ends of the plurality of first reinforcing ribs 150 away from the first groove 120 are respectively installed at the ends of the third reinforcing ribs 250 away from the second groove 220. The first reinforcing ribs 150 and the third reinforcing ribs 250 are used to support and connect the first shell plate 110 and the second shell plate 210, thereby improving the stability of the first shell plate 110 and the second shell plate 210 and preventing the first shell plate 110 and the second shell plate 210 from being easily deformed.

[0029] Multiple groups of the first reinforcing ribs 150 and the second reinforcing ribs 160 are equidistantly arranged, and the third reinforcing ribs 250 and the fourth reinforcing ribs 260 are equidistantly arranged. The edge of the first groove 120 is formed with a first connecting edge 140, and the edge of the second groove 220 is formed with a second connecting edge 240. Multiple groups of the first reinforcing ribs 150 and the second reinforcing ribs 160 are all at the same height as the first connecting edge 140, and multiple groups of the third reinforcing ribs 250 and the fourth reinforcing ribs 260 are all at the same height as the second connecting edge 240. The depths of the first groove 120 and the second groove 220 are half the thickness of the first shell plate 110 and the second shell plate 210, respectively, and the depths of the multiple groups of the first pressure relief grooves 130 and the second pressure relief grooves 230 are half the depths of the first groove 120 and the second groove 220, respectively.

[0030] The reinforcing assembly includes a reinforcing plate 310, which is installed on the side of the second shell plate 210 away from the first shell plate 110. The reinforcing plate 310 is provided with multiple groups of third pressure relief grooves 320, and the multiple groups of third pressure relief grooves 320 are respectively on the same vertical line with the multiple groups of second pressure relief grooves 230. The reinforcing plate 310 is provided on the second shell plate 210 to support the second shell plate 210, thereby improving the strength of the second shell plate 210 and making it less likely to deform. At the same time, the provision of the third pressure relief grooves 320 ensures that when the battery is thermally runaway, the reinforcing plate 310 will not block the first pressure relief groove 130 and the second pressure relief groove 230, so that the heat spreader can release pressure normally.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultra-thin vapor chamber with a pressure relief structure, characterized in that: The invention comprises a shell, wherein the shell comprises a first shell plate (110) and a second shell plate (210), wherein the second shell plate (210) is mounted on the first shell plate (110), and a reinforcement component for reinforcing the shell is mounted on a side of the second shell plate (210) away from the first shell plate (110); A first groove (120) is provided on one side of the first shell plate (110) close to the second shell plate (210), and a plurality of first pressure relief grooves (130) are provided in the first groove (120). A second groove (220) is provided on one side of the second shell plate (210) close to the first shell plate (110). A cavity is formed between the first groove (120) and the second groove (220), and a liquid wick and a working medium are arranged in the cavity. The interior of the cavity is in a vacuum state. A plurality of second pressure relief grooves (230) are provided in the second groove (220), and the plurality of first pressure relief grooves ( The first pressure relief groove (130) and the second pressure relief groove (230) are respectively arranged at the edges of the first groove (120) and the second groove (220), and the plurality of groups of the first pressure relief grooves (130) and the second pressure relief grooves (230) are symmetrically arranged, the plurality of groups of the first pressure relief grooves (130) are all installed with second reinforcing ribs (160), the plurality of groups of the second pressure relief grooves (230) are all installed with fourth reinforcing ribs (260), and the ends of the plurality of groups of the second reinforcing ribs (160) away from the first pressure relief groove (130) are respectively installed at the ends of the plurality of groups of the fourth reinforcing ribs (260) away from the second pressure relief groove (230).

2. The ultra-thin vapor chamber with a pressure relief structure according to claim 1, characterized in that: A plurality of groups of first reinforcing ribs (150) are installed at the bottom of the first groove (120), a plurality of groups of third reinforcing ribs (250) are installed inside the second groove (220), and ends of the plurality of groups of first reinforcing ribs (150) away from the first groove (120) are respectively installed at ends of the third reinforcing ribs (250) away from the second groove (220).

3. The ultra-thin vapor chamber with a pressure relief structure according to claim 2, characterized in that: The plurality of groups of the first reinforcing ribs (150) and the second reinforcing ribs (160) are arranged at equal intervals, and the third reinforcing ribs (250) and the fourth reinforcing ribs (260) are arranged at equal intervals.

4. The ultra-thin vapor chamber with a pressure relief structure according to claim 3, characterized in that: A first connecting edge (140) is formed at the edge of the first groove (120), and a second connecting edge (240) is formed at the edge of the second groove (220).

5. The ultra-thin vapor chamber with a pressure relief structure according to claim 4, characterized in that: Multiple groups of the first reinforcing ribs (150) and the second reinforcing ribs (160) are all at the same height as the first connecting edge (140), and multiple groups of the third reinforcing ribs (250) and the fourth reinforcing ribs (260) are all at the same height as the second connecting edge (240).

6. The ultra-thin vapor chamber with a pressure relief structure according to claim 5, characterized in that: The depths of the first groove (120) and the second groove (220) are respectively half of the thickness of the first shell plate (110) and the second shell plate (210), and the depths of the plurality of groups of the first pressure relief grooves (130) and the second pressure relief grooves (230) are respectively half of the depth of the first groove (120) and the second groove (220).

7. The ultra-thin vapor chamber with a pressure relief structure according to claim 6, characterized in that: The reinforcing assembly comprises a reinforcing plate (310), wherein the reinforcing plate (310) is installed on a side of the second shell plate (210) away from the first shell plate (110), and a plurality of groups of third pressure relief grooves (320) are provided on the reinforcing plate (310), wherein the plurality of groups of third pressure relief grooves (320) are respectively located on the same vertical line as the plurality of groups of second pressure relief grooves (230).

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