Soaking plate, soaking tool and battery pack
By using adaptive temperature adjustment of the heat homogenization plate and phase change medium in lithium batteries, the temperature problems of single cells during temperature rise and fall are solved, and the service life and efficiency of the battery are improved.
Patent Information
- Application Number
- CN202422244682.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-09-12
AI Technical Summary
In the prior art, lithium batteries are prone to aging and weakening of consistency during long-term use, resulting in difficulty in maintaining a suitable operating temperature when the single battery is overheated or low temperature, and there is a risk of thermal runaway.
The heat-homing plate is adopted, which contains a closed heat-homing chamber and a phase change medium. The adaptive adjustment of the temperature of the single cell is achieved through the phase change of heat absorption or exothermic of the medium to ensure that the battery can maintain a suitable temperature during temperature rise and fall.
The adaptive adjustment of the temperature of a single battery is achieved, which improves the consistency and service life of the battery, avoids the risk of thermal runaway, and improves the efficiency and service life of the battery.
Smart Images
Figure CN223296901U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a heat spreader, a heat spreader tool and a battery pack. Background Art
[0002] In related technologies, lithium batteries inevitably age and lose consistency over time, which can easily lead to overheating of individual cells and even thermal runaway accidents. Current temperature control structures can only lower the temperature of individual cells to ensure safety when the temperature rises, but cannot increase the temperature of individual cells at low temperatures, making it difficult for the individual cells to maintain a suitable operating temperature. Utility Model Content
[0003] The embodiments of the present invention provide a heat spreader, a heat spreader tooling, and a battery pack, which can realize adaptive regulation of the temperature of single cells, so that the temperature can be improved when the temperature rises and falls, to ensure that the battery is in a suitable temperature environment, thereby improving the efficiency of the battery and extending the service life of the battery.
[0004] In a first aspect, an embodiment of the present invention provides a vapor chamber for use in a single battery, comprising:
[0005] The plate body is constructed with a closed heat-saturating cavity filled with a heat-saturating medium. The plate body is configured to be attached to the outer surface of the single cell. The heat-saturating medium is configured to absorb heat through phase change when the temperature of the single cell is higher than a first temperature, and to release heat through phase change when the temperature of the single cell is lower than a second temperature, wherein the first temperature is greater than the second temperature.
[0006] In one embodiment, within the temperature range between the first temperature and the second temperature, the heat-scaling medium is at least partially liquid, the heat-scaling medium is configured to at least partially change phase into a gaseous state when the temperature of the single cell is higher than the first temperature, and the heat-scaling medium is configured to at least partially change phase into a solid state when the temperature of the single cell is lower than the second temperature.
[0007] In one embodiment, the wall surface of the heat-saturating chamber is constructed with a capillary structure.
[0008] In one embodiment, a connection hole is configured on the plate body, the connection hole is staggered with the heat-saturating chamber, and the connection hole is configured as a connection fastener.
[0009] In one embodiment, a heat conducting layer is formed on the wall surface of the heat-saturating chamber, and the thickness of the heat conducting layer is D1, which satisfies the following relationship: 0<D1≤5 microns.
[0010] In one embodiment, the heat-absorbing chamber extends along a first direction, and the length of the heat-absorbing chamber is D2, which satisfies: 300 mm ≤ D2 ≤ 350 mm.
[0011] In one embodiment, the heat-averaging chambers are spaced apart in at least two along the second direction, and the distance between each two adjacent heat-averaging chambers is D3, satisfying: 2 mm ≤ D3 ≤ 5 mm, wherein the second direction is perpendicular to the first direction.
[0012] In one embodiment, along the third direction, the thickness of the plate body is D4, which satisfies: 10 mm ≤ D4 ≤ 20 mm, wherein the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction;
[0013] And / or, along the third direction, the height of the heat soaking chamber is D5, which satisfies: 8 mm ≤ D5 ≤ 16 mm.
[0014] In a second aspect, an embodiment of the present invention provides a soaking fixture comprising at least two soaking plates as described above, wherein each two adjacent soaking plates are spaced apart to sandwich single cells.
[0015] In a third aspect, an embodiment of the present invention provides a battery pack, comprising:
[0016] As the aforementioned heat sink;
[0017] There are at least two single cells, and a heat spreader is sandwiched between every two adjacent single cells.
[0018] Beneficial effects of the embodiments of the present utility model:
[0019] In an embodiment of the present invention, by forming a closed heat-saturating chamber within the plate body, the heat-saturating medium within the heat-saturating chamber can be used to make the temperature of each area of the plate body relatively uniform, thereby improving the consistency of the battery. When the temperature of the single cell exceeds a first temperature, the heat-saturating medium within the heat-saturating chamber can undergo a phase change and absorb heat, thereby lowering the temperature of the single cell. When the temperature of the single cell is lower than a second temperature, the heat-saturating medium within the heat-saturating chamber can undergo a phase change and release heat, thereby raising the temperature of the single cell. In this way, adaptive regulation of the temperature of the single cell can be achieved, allowing it to improve its own temperature during both temperature increases and decreases, ensuring that the battery is in a suitable temperature environment, thereby improving the efficiency of the battery and extending the battery life. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0021] Figure 1This is a three-dimensional schematic diagram of a heat soaking fixture provided in an embodiment of the present utility model;
[0022] Figure 2 This is a three-dimensional schematic diagram of a vapor chamber provided in an embodiment of the present utility model;
[0023] Figure 3 is a cross-sectional view of a vapor chamber provided in an embodiment of the present utility model;
[0024] Figure 4 is a cross-sectional view of a vapor chamber provided in an embodiment of the present utility model;
[0025] Figure 5 is a cross-sectional view of a vapor chamber provided in an embodiment of the present utility model;
[0026] Figure 6 It is a schematic diagram of the partial structure of the capillary structure provided by the embodiment of the present utility model.
[0027] Reference numerals:
[0028] 10-board body, 20-heat-absorbing chamber, 30-capillary structure, 40-connection hole, 50-heat-conducting layer, 60-single battery. DETAILED DESCRIPTION
[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.
[0030] See also Figures 1 to 6 An embodiment of the present application provides a heat spreader. The heat spreader is applied to a single cell 60 and includes a plate body 10. The plate body 10 is constructed with a closed heat spreader chamber 20. The heat spreader chamber 20 is filled with a heat spreader medium. The plate body 10 is configured to adhere to the outer surface of the single cell 60. The heat spreader medium is configured to undergo a phase change and absorb heat when the single cell 60 is above a first temperature, and to undergo a phase change and release heat when the single cell 60 is below a second temperature. The first temperature is greater than the second temperature.
[0031] In some embodiments, by forming a closed heat-saturating chamber 20 within the panel body 10, the heat-saturating medium within the heat-saturating chamber 20 can be used to achieve relatively uniform temperatures across the panel body 10, thereby improving battery consistency. When the temperature of a single battery cell 60 exceeds a first temperature, the heat-saturating medium within the heat-saturating chamber 20 can undergo a phase change and absorb heat, thereby lowering the temperature of the single battery cell 60. When the temperature of the single battery cell 60 falls below a second temperature, the heat-saturating medium within the heat-saturating chamber 20 can undergo a phase change and release heat, thereby raising the temperature of the single battery cell 60. This allows for adaptive temperature regulation of the single battery cell 60, allowing it to improve its own temperature both during temperature increases and decreases, ensuring that the battery is in a suitable temperature environment, thereby improving battery efficiency and extending its service life.
[0032] It is understandable that, since the heat-saturating chamber 20 is a closed chamber, the heat-saturating medium disposed therein is substantially not consumed and can be recycled, thereby avoiding waste of resources and reducing the cost of use.
[0033] The plate body 10 can be made of a heat-conducting metal material, such as 45 steel or 304 stainless steel.
[0034] The heat-absorbing chamber 20 can be configured in any shape, such as a square, circular, elliptical, polygonal, or irregularly shaped chamber. The heat-absorbing chamber 20 can extend along the length of the panel body 10. This allows the heat-absorbing chamber 20 to absorb heat, dissipate heat, or heat the individual cells 60 along the length of the panel body 10, achieving temperature regulation. The heat-absorbing chamber 20 can also extend across the width of the panel body 10. This allows the heat-absorbing chamber 20 to absorb heat, dissipate heat, or heat the individual cells 60 across the width of the panel body 10, achieving temperature regulation.
[0035] The heat-scaling medium can be a single medium, a composite medium, or a mixed medium. For example, if the heat-scaling medium is a mixed medium, and the phase transition temperature of a portion of the medium is a first temperature, then this portion of the medium can undergo a phase transition and absorb heat when the temperature of the single battery 60 exceeds the first temperature, thereby cooling the single battery 60. If the phase transition temperature of another portion of the medium is a second temperature, then this portion of the medium can undergo a phase transition and release heat when the temperature of the single battery 60 falls below the second temperature, thereby heating the single battery 60.
[0036] The phrase "when the temperature of the single battery 60 is higher than the first temperature, the heat-scaling medium undergoes a phase change and absorbs heat" means that the heat-scaling medium undergoes a phase change and absorbs heat when the temperature of the single battery 60 is greater than or equal to the first temperature. The phrase "when the temperature of the single battery 60 is lower than the second temperature, the heat-scaling medium undergoes a phase change and releases heat" means that the heat-scaling medium undergoes a phase change and releases heat when the temperature of the single battery 60 is lower than or equal to the second temperature.
[0037] In some embodiments, the first temperature can be set to 40 degrees Celsius, and the second temperature can be set to 30 degrees Celsius. The heat-sparging medium can then undergo a phase change at 30 degrees Celsius, releasing heat and thereby heating the battery cells 60. The heat-sparging medium can undergo a phase change at 40 degrees Celsius, absorbing heat and thereby dissipating heat from the battery cells 60. This allows the temperature of the battery cells 60 to be kept within a relatively suitable temperature range, thereby improving battery efficiency and extending battery life.
[0038] In some embodiments, the first temperature can be set to 50 degrees Celsius, and the second temperature can be set to 20 degrees Celsius. The heat-sparging medium can then undergo a phase change at 20 degrees Celsius, releasing heat and thereby heating the battery cells 60. The heat-sparging medium can undergo a phase change at 50 degrees Celsius, absorbing heat and thereby dissipating heat from the battery cells 60. This allows the temperature of the battery cells 60 to be kept within a relatively suitable temperature range, thereby improving battery efficiency and extending battery life.
[0039] In some embodiments, the first temperature can be set to 60 degrees Celsius, and the second temperature can be set to 10 degrees Celsius. The heat-sparging medium can then undergo a phase change at 10 degrees Celsius, releasing heat and thereby heating the battery cells 60. The heat-sparging medium can undergo a phase change at 60 degrees Celsius, absorbing heat and thereby dissipating heat from the battery cells 60. This allows the temperature of the battery cells 60 to be kept within a relatively suitable temperature range, thereby improving battery efficiency and extending battery life.
[0040] In some embodiments, within a temperature range between a first temperature and a second temperature, the heat-sparging medium is at least partially liquid. The heat-sparging medium is configured to at least partially change phase to a gaseous state when the battery cell 60 is above the first temperature. The heat-sparging medium is configured to at least partially change phase to a solid state when the battery cell 60 is below the second temperature.
[0041] It is understood that when the temperature of the single cell 60 rises due to heat generation by the single cell 60 or excessively high ambient temperature, causing the temperature of the single cell 60 to exceed the first temperature, the at least partially liquid heat-saturating medium in the heat-saturating chamber 20 can vaporize into a gaseous state and absorb heat during the vaporization process, thereby cooling the single cell 60. When the single cell 60 is in a low-temperature environment, causing the temperature of the single cell 60 to fall below the second temperature, the at least partially liquid heat-saturating medium in the heat-saturating chamber 20 solidifies into a solid state and releases heat during the solidification process, thereby increasing the temperature of the single cell 60.
[0042] Therefore, based on the phase change of the heat-saturating medium, the consistency and service life of the battery can be improved.
[0043] When the battery cells 60 are within a temperature range between the first and second temperatures, the at least partially liquid heat-saturating medium can conduct heat through its fluidity, distributing the heat relatively evenly across the plate body 10 and achieving a heat-saturating effect. For example, when the heat-saturating plate is applied to a battery pack and then assembled in a vehicle, the movement of the vehicle can cause the at least partially liquid heat-saturating medium to flow within the heat-saturating chamber 20, thereby achieving a heat-saturating effect.
[0044] In the temperature range between the first temperature and the second temperature, at least a portion of the liquid heat-saturating medium does not completely fill the heat-saturating chamber 20. This allows the heat-saturating medium to flow within the heat-saturating chamber 20 to a certain extent, while also providing space for vaporization, allowing the liquid heat-saturating medium to at least partially vaporize and absorb, thereby dissipating heat from the single battery 60.
[0045] In some embodiments, within the temperature range between the first temperature and the second temperature, the heat-saturating medium is entirely liquid, or within the temperature range between the first temperature and the second temperature, the heat-saturating medium is partially liquid and partially gaseous or solid.
[0046] like Figure 6 As shown, in some embodiments, the wall surface of the heat-saturating chamber 20 is constructed with a capillary structure 30 .
[0047] It is understood that the capillary structure 30 can increase the surface area of the wall of the heat-absorbing chamber 20, thereby increasing the contact area between the heat-absorbing chamber 20 and the heat-absorbing medium, thereby improving the heat exchange efficiency and achieving rapid heating or cooling of the single battery 60.
[0048] In some embodiments, the capillary structure 30 is a micro-groove constructed on the wall surface of the heat-saturating chamber 20. Thus, the contact area with the heat-saturating medium is increased based on the groove surface of the micro-groove. The micro-groove can be configured as a V-groove, a U-groove, or other shapes. The micro-groove can extend along the length of the heat-saturating chamber 20. Multiple micro-grooves can be provided along the circumference of the wall surface of the heat-saturating chamber 20, and the multiple micro-grooves can be arranged continuously or at intervals.
[0049] like Figure 6 As shown, the groove wall of the micro groove is provided with at least two continuously distributed V-shaped grooves, thereby forming a capillary structure 30 similar to a sawtooth shape.
[0050] In some embodiments, the capillary structure 30 is a micropore constructed on the wall of the heat-saturating chamber 20. This increases the contact area with the heat-saturating medium based on the wall surface of the micropore. The micropores can be configured in shapes such as circular, elliptical, or conical. Multiple micropores can be provided, and the multiple micropores can be distributed in an array or arranged in a random pattern.
[0051] like Figure 2 As shown, in some embodiments, a connection hole 40 is configured on the plate body 10 , the connection hole 40 is staggered with the heat soaking chamber 20 , and the connection hole 40 is configured to connect a fastener.
[0052] It is understood that when the board body 10 is used in testing or battery packs, at least two board bodies 10 are typically provided. Fasteners are inserted through the connection holes 40 of at least two board bodies 10 to connect the at least two board bodies 10. Furthermore, due to the aforementioned connection method between the board bodies 10, when used as a test fixture, there is no need for a test fixture, resulting in a simple structure and low manufacturing cost.
[0053] The connection hole 40 and the heat-absorbing chamber 20 are staggered to prevent the connection hole 40 and the heat-absorbing chamber 20 from being connected and causing the heat-absorbing medium to leak out of the connection hole 40 .
[0054] In some embodiments, the plate body 10 can be rectangular. Four connection holes 40 can be provided, one at each of the four corners of the plate body 10. The fasteners can include bolts and nuts. The bolts are sequentially passed through the connection holes 40 of at least two plate bodies 10 and tightened with nuts to achieve a connection between the at least two plate bodies 10.
[0055] like Figure 4 As shown, in some embodiments, a heat conducting layer 50 is formed on the wall of the heat soaking chamber 20. The thickness of the heat conducting layer 50 is D1, which satisfies the following relationship: 0<D1≤5 microns.
[0056] It is understood that the heat-conducting layer 50 can improve the thermal conductivity to achieve rapid heat dissipation or heating. For example, the heat-conducting layer 50 can be made of copper.
[0057] The thickness D1 of the heat conducting layer 50 is controlled to be in the range of 0 to 5 micrometers, so that the thickness of the heat conducting layer 50 can be relatively thin, thereby preventing the heat conducting layer 50 from occupying too much space in the heat soaking chamber 20 .
[0058] For example, the thickness D1 of the heat conducting layer 50 is set to 1 micron, 2 microns, 3 microns, 4 microns, or 5 microns, or any value therebetween.
[0059] like Figure 5 As shown, in some embodiments, the heat soaking chamber 20 extends along the first direction. The length of the heat soaking chamber 20 is D2, which satisfies: 300 mm ≤ D2 ≤ 350 mm.
[0060] By controlling the length D2 of the heat soaking chamber 20 to be between 300 mm and 350 mm, the heat soaking chamber 20 can be extended to a longer length, thereby heating and cooling a larger area of the single battery 60. Furthermore, the extended length of the heat soaking chamber 20 can expand the heat soaking range.
[0061] For example, the length D2 of the soaking chamber 20 can be set to 300 mm, 310 mm, 320 mm, 330 mm, 340 mm or 350 mm, or any value therebetween.
[0062] If the length of the soaking chamber 20 is less than 300 mm, it may prevent the cells 60 from achieving a uniform heat distribution effect, or it may be difficult for the cells 60 to cool down or heat up, resulting in poor temperature regulation. Due to the length limitation of the soaking chamber, the length of the soaking chamber 20 is limited to 350 mm to ensure a closed soaking chamber 20.
[0063] like Figure 4 and Figure 5 As shown, in some embodiments, the heat-absorbing chambers 20 are spaced apart in the second direction to form at least two heat-absorbing chambers 20, and the distance between each two adjacent heat-absorbing chambers 20 is D3, satisfying: 2 mm ≤ D3 ≤ 5 mm, wherein the second direction is perpendicular to the first direction.
[0064] It is understood that providing multiple heat-absorbing chambers 20 can further increase the heat-absorbing area. Each adjacent heat-absorbing chamber 20 is spaced apart, so that each heat-absorbing chamber 20 can independently absorb heat, heat or dissipate heat for the single cells 60 in its corresponding area.
[0065] For example, the distance D3 between the heat soaking chambers 20 can be set to 2 mm, 3 mm, 4 mm, 5 mm, or any value therebetween.
[0066] The larger the width of the heat soaking chamber 20, the fewer heat soaking chambers 20 are provided. The smaller the width of the heat soaking chamber 20, the more heat soaking chambers 20 are provided. The number and spacing of the heat soaking chambers 20 can be reasonably set based on the width of the heat soaking chamber 20 and the width of the plate body 10.
[0067] Please continue reading Figure 4 In some embodiments, along the third direction, the thickness of the plate body 10 is D4, satisfying: 10 mm ≤ D4 ≤ 20 mm, wherein the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.
[0068] It is understood that controlling the thickness D4 of the board body 10 to 10 mm to 20 mm can ensure that the board body 10 has sufficient strength to support the single battery 60 and prevent the battery module from being too large due to the excessive thickness of the board body 10.
[0069] For example, the thickness D4 of the plate body 10 is set to 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, or 20 mm, or any value therebetween.
[0070] In some embodiments, as Figure 3 As shown, the first direction is the length direction of the plate body 10 , the second direction is the width direction of the plate body 10 , and the third direction is the thickness direction of the plate body 10 .
[0071] Please continue reading Figure 4 In some embodiments, along the third direction, the height of the heat soaking chamber 20 is D5, which satisfies: 8 mm ≤ D5 ≤ 16 mm.
[0072] It is understandable that the height D5 of the heat soaking chamber 20 is controlled to be between 8 mm and 16 mm so that it can adapt to the thickness of the plate body 10 .
[0073] For example, the height D5 of the soaking chamber 20 is set to 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, or any value therebetween.
[0074] The height of the soaking chamber 20 can also be positively correlated with the thickness of the plate body 10. That is, the thicker the plate body 10, the greater the height of the soaking chamber 20. For example, if the thickness D4 of the plate body 10 is set to 10 mm, the height D5 of the soaking chamber 20 is set to 8 mm. For example, if the thickness D4 of the plate body 10 is set to 20 mm, the height D5 of the soaking chamber 20 is set to 16 mm.
[0075] like Figure 1 As shown, the present embodiment further provides a heat spreader. The heat spreader comprises at least two heat spreaders as described in the above embodiment. Each adjacent two heat spreaders are spaced apart to sandwich a single battery 60.
[0076] In some embodiments, by forming a closed heat-saturating chamber 20 within the panel body 10, the heat-saturating medium within the heat-saturating chamber 20 can be used to achieve relatively uniform temperatures across the panel body 10, thereby improving battery consistency. When the temperature of a single battery cell 60 exceeds a first temperature, the heat-saturating medium within the heat-saturating chamber 20 can undergo a phase change and absorb heat, thereby lowering the temperature of the single battery cell 60. When the temperature of the single battery cell 60 falls below a second temperature, the heat-saturating medium within the heat-saturating chamber 20 can undergo a phase change and release heat, thereby raising the temperature of the single battery cell 60. This allows for adaptive temperature regulation of the single battery cell 60, allowing it to improve its own temperature both during temperature increases and decreases, ensuring that the battery is in a suitable temperature environment, thereby improving battery efficiency and extending its service life.
[0077] When testing a single cell 60, this test fixture allows fasteners to pass through its connection holes 40 to directly connect at least two vapor chambers, allowing the single cell 60 to be clamped and secured between each pair of adjacent vapor chambers. This eliminates the need for a test fixture during testing, resulting in a simple structure and low manufacturing costs.
[0078] The present application also provides a battery pack, which includes a vapor chamber as described in the aforementioned embodiment and at least two single cells 60 , wherein a vapor chamber is sandwiched between each two adjacent single cells 60 .
[0079] In some embodiments, by forming a closed heat-saturating chamber 20 within the panel body 10, the heat-saturating medium within the heat-saturating chamber 20 can be used to achieve relatively uniform temperatures across the panel body 10, thereby improving battery consistency. When the temperature of a single battery cell 60 exceeds a first temperature, the heat-saturating medium within the heat-saturating chamber 20 can undergo a phase change and absorb heat, thereby lowering the temperature of the single battery cell 60. When the temperature of the single battery cell 60 falls below a second temperature, the heat-saturating medium within the heat-saturating chamber 20 can undergo a phase change and release heat, thereby raising the temperature of the single battery cell 60. This allows for adaptive temperature regulation of the single battery cell 60, allowing it to improve its own temperature both during temperature increases and decreases, ensuring that the battery is in a suitable temperature environment, thereby improving battery efficiency and extending its service life.
[0080] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, based on the idea of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.
Claims
1. A heat spreader, applied to a single battery, characterized in that: include: The plate body is constructed with a closed heat-saturating cavity filled with a heat-saturating medium. The plate body is configured to be attached to the outer surface of the single cell. The heat-saturating medium is configured to absorb heat through phase change when the temperature of the single cell is higher than a first temperature, and to release heat through phase change when the temperature of the single cell is lower than a second temperature, wherein the first temperature is greater than the second temperature.
2. The vapor chamber according to claim 1, wherein: In the temperature range between the first temperature and the second temperature, the heat-sparing medium is at least partially liquid, the heat-sparing medium is configured to at least partially change into a gaseous state when the temperature of the single battery is higher than the first temperature, and the heat-sparing medium is configured to at least partially change into a solid state when the temperature of the single battery is lower than the second temperature.
3. The vapor chamber according to claim 1, wherein: The wall surface of the heat-saturating chamber is constructed with a capillary structure.
4. The vapor chamber according to any one of claims 1 to 3, wherein: A connecting hole is configured on the plate body, the connecting hole is staggered with the heat-saturating chamber, and the connecting hole is configured as a connecting fastener.
5. The vapor chamber according to any one of claims 1 to 3, characterized in that: The wall surface of the heat-saturating cavity is formed with a heat-conducting layer, and the thickness of the heat-conducting layer is D1, which satisfies the following conditions: 0<D1≤5 microns.
6. The vapor chamber according to any one of claims 1 to 3, characterized in that: The heat-saturating chamber extends along a first direction, and a length of the heat-saturating chamber is D2, which satisfies: 300 mm ≤ D2 ≤ 350 mm.
7. The vapor chamber according to claim 6, wherein: At least two heat-absorbing chambers are spaced apart along the second direction, and the distance between each two adjacent heat-absorbing chambers is D3, satisfying: 2 mm ≤ D3 ≤ 5 mm, wherein the second direction is perpendicular to the first direction.
8. The vapor chamber according to claim 7, wherein: Along the third direction, the thickness of the plate body is D4, which satisfies: 10 mm ≤ D4 ≤ 20 mm, wherein the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction; And / or, along the third direction, the height of the heat soaking chamber is D5, which satisfies: 8 mm ≤ D5 ≤ 16 mm.
9. A heat soaking tool, characterized in that: The device comprises at least two vapor chambers according to any one of claims 1 to 8, wherein each two adjacent vapor chambers are spaced apart to sandwich single cells.
10. A battery pack, characterized in that: include: The vapor chamber according to any one of claims 1 to 8; There are at least two single cells, and a heat spreader is sandwiched between every two adjacent single cells.