Bent vapor chamber and blade battery with same

Abstract

The utility model relates to a bent vapor chamber and a blade battery with the same. The bending type vapor chamber comprises a bending sealing cavity, a liquid absorbing core and a concave-convex supporting column, the liquid absorbing core is laid on the inner surface of one side of the bending sealing cavity, a bending angle is formed at the bending position of the bending sealing cavity, and the concave-convex supporting column is arranged on the inner surface of one side of the bending sealing cavity. The concave-convex supporting column is arranged in the bent position of the bent sealing cavity so as to support the bent angle. According to the bending type vapor chamber, stress at the bending position is shared through the supporting columns, stress concentration is avoided, and the bending type vapor chamber has the advantages that the structure is simple and stable, and wrinkles or collapse cannot occur at the bending position.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heat sink, especially to a kind of bending type vapo(u)r chamber and the blade battery with the vapo(u)r chamber. BACKGROUND

[0002] With the rapid development of new energy automobile field, the requirements of automobile battery in energy density, power density, safety, service life, extreme environment applicability and cost control are continuously improved. The blade battery based on lithium iron phosphate technology is widely concerned due to high energy density, high safety and long cycle life. The blade battery improves the space utilization and energy density of battery pack through flat design. The tab of blade battery is distributed on both sides of the long end of the battery. During charging and discharging process, heat is mainly concentrated near the tab, causing too large temperature difference between the two ends and the middle of the battery. If the heat cannot be dissipated in time, especially during rapid charging, it will cause capacity imbalance in different areas of the battery, and further cause capacity loss and unstable power output, accelerating battery aging.

[0003] In order to effectively dissipate heat of the blade battery, a vapo(u)r chamber is usually arranged on the surface of the battery shell to quickly conduct heat out. The vapo(u)r chamber usually has straight plate type and bending type. The bending type vapo(u)r chamber can quickly spread and conduct the heat generated by the battery to the bottom of the battery. The heat is dissipated through the liquid cooling plate at the bottom, so as to avoid local overheating of the battery. However, compared with the straight plate type vapo(u)r chamber, the bending type vapo(u)r chamber often has the problems of poor heat conduction and unsatisfactory heat dissipation effect during use. SUMMARY

[0004] Therefore, the purpose of the utility model is to provide a bending type vapo(u)r chamber and a blade battery with the vapo(u)r chamber.

[0005] A bending type vapo(u)r chamber, characterized in that it comprises a bending sealed cavity, a liquid absorbing core and a concave-convex supporting column. The liquid absorbing core is laid on the inner surface of one side of the bending sealed cavity. The bending sealed cavity forms a bending angle at the bending part. The concave-convex supporting column is arranged in the bending part of the bending sealed cavity to support the bending angle.

[0006] The bending type vapo(u)r chamber has the concave-convex supporting column at the bending angle, which plays a supporting role, can share the stress at the bending angle, and avoids wrinkles or collapse at the bending angle, so as to affect the performance of the vapo(u)r chamber.

[0007] Further, the bending sealed cavity comprises a first cavity and a second cavity. One side of the first cavity is connected and communicated with one side of the second cavity. The bending angle is located at the connection part of the first cavity and the second cavity.

[0008] Further, the first cavity comprises a first horizontal plate, a second horizontal plate and a first connecting plate connected between the first horizontal plate and the second horizontal plate;

[0009] The second cavity comprises a first vertical plate, a second vertical plate and a second connecting plate connected between the first vertical plate and the second vertical plate;

[0010] The first horizontal plate and the first vertical plate are connected on one side and the plate surfaces are not parallel to each other, the second horizontal plate and the second vertical plate are connected on one side and the plate surfaces are not parallel to each other, and the second vertical plate is located on the side of the first vertical plate away from the first horizontal plate, and the second horizontal plate is located on the side of the first horizontal plate away from the first vertical plate.

[0011] Further, the connection between the first horizontal plate and the first vertical plate is provided with a rounded corner, and the connection between the second horizontal plate and the second vertical plate is provided with a rounded corner. Through the above technical scheme, the rounded corner design of the connection can reduce stress concentration and enhance the stability of the structure of the uniform heating plate.

[0012] Further, the concave-convex support column comprises an avoiding part and an abutting part, the avoiding part abuts the connection between the first horizontal plate and the first vertical plate, and the abutting part abuts the connection between the second horizontal plate and the second vertical plate. Through the above technical scheme, the stress generated at the connection is shared by the support of the concave-convex support column at the connection, thereby avoiding wrinkles or collapse at the connection.

[0013] Further, the avoiding part is provided with a recessed pit towards the abutting part, and the abutting part is provided with a protruding convex part away from the avoiding part. Through the above technical scheme, the structure of the recessed pit and the protruding convex part can cooperate with the rounded corner to more effectively disperse and resist stress from all directions.

[0014] Further, the liquid absorption core is laid on the inner surface of the second horizontal plate and the second vertical plate, one end of the liquid absorption core is flush with the end of the second vertical plate away from the second horizontal plate, and the other end of the liquid absorption core is flush with the end of the second horizontal plate away from the second vertical plate. Through the above technical scheme, it is beneficial to the transmission of the liquid working medium from the first cavity to the second cavity.

[0015] Further, the first cavity and the second cavity are further provided with a support column connected between the first horizontal plate and the second horizontal plate, and connected between the first vertical plate and the second vertical plate. Through the above technical scheme, the uniform heating plate can maintain a stable shape and structure during operation, preventing collapse or damage caused by thermal deformation or external pressure.

[0016] A blade battery with a heating plate, comprising: an electric core, two pole ears and the two-bending heating plate, the bending angle of the bending heating plate is 90°;

[0017] The two pole ears are arranged on the front and back sides of the electric core in the length direction, and the electric core further comprises an upper side, a lower side, a left side and a right side connected between the two pole ears;

[0018] The first horizontal plate and the first vertical plate of one of the two bending heating plates are tightly combined with the lower side and the left side of the electric core respectively, and the first horizontal plate and the first vertical plate of the other bending heating plate are tightly combined with the upper side and the right side of the electric core respectively, and the two bending heating plates wrap the electric core.

[0019] Further, the blade battery further comprises two insulating end covers and an insulating blue film;

[0020] The two insulating end covers cover the front and back sides of the electric core respectively, and the two pole ears pass through the two insulating end covers and protrude outside the insulating end covers;

[0021] The insulating blue film wraps the outside of the second horizontal plate and the second vertical plate of the two bending heating plates respectively.

[0022] Through the above technical scheme, a sealed and insulated structure is formed to prevent short circuit accidents.

[0023] The bending heating plate and the blade battery provided by the utility model have the following advantages:

[0024] (1) By arranging the concave-convex supporting column at the bending part of the bending heating plate to share the stress generated at the bending part, the performance of the bending heating plate caused by wrinkles or collapse at the bending part is avoided, and the structural strength of the bending heating plate is also enhanced, thereby improving the use reliability of the bending heating plate.

[0025] (2) By arranging the heat dissipation assembly on the surface of the electric core of the blade battery, the rapid heat dissipation of the surface of the electric core is realized, the accumulation of heat is avoided, and the safety and service life of the battery are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 An exploded view of the bending heating plate provided by the utility model;

[0027] Figure 2 A sectional view of the bending heating plate provided by the utility model along the projection perpendicular to the extending direction of the supporting column;

[0028] Figure 3 A schematic view of the overall structure of the blade battery provided by the utility model;

[0029] Figure 4The utility model provides a blade battery along the polar lug extension direction projects the main view of the utility model.

[0030] In the figure, 100, the bending type all hot plate, 10, first cavity, 101, first cross plate, 102, second cross plate, 103, first connecting plate, 20, second cavity, 201, first vertical plate, 202, second vertical plate, 203, second connecting plate, 30, liquid absorbing core, 40, concave-convex support column, 41, avoiding portion, 42, abutting portion, 50, support column, 300, blade battery, 310, electric core, 320, polar lug, 400, insulating heat dissipation assembly, 430, insulating end cover, 431, through hole, 440, insulating blue film. DETAILED DESCRIPTION

[0031] The applicant finds that the reason for poor heat conduction and unsatisfactory heat dissipation efficiency is that there are wrinkles or collapse blockage at the bending angle of the bending type all hot plate, which causes the thermal resistance of the bending part to increase and the heat transfer rate to decrease in the research on the heat conduction and heat dissipation efficiency of the bending type all hot plate. Based on this, the applicant proposes a bending type all hot plate, which sets a concave-convex support column at the bending part to avoid wrinkles and collapse of the shell during bending, thereby improving the heat transfer rate.

[0032] In order to better understand and implement, the utility model is described in detail below with reference to the drawings.

[0033] Please refer to Figure 1 and Figure 2 , Figure 1 The utility model provides the explosion map of the bending type all hot plate; Figure 2 The utility model provides the section view of the bending type all hot plate along the projection direction perpendicular to the support column extension direction.

[0034] The bending type all hot plate 100 includes a first cavity 10, a second cavity 20, a liquid absorbing core 30 and a plurality of concave-convex support columns 40 for supporting the bending part.

[0035] The first cavity 10 includes a first cross plate 101, a second cross plate 102 and a first connecting plate 103. The first cross plate 101 and the second cross plate 102 are parallel to each other and have a gap, and the first connecting plate 103 is connected between the edges of the first cross plate 101 and the second cross plate 102 to seal the first cavity 10.

[0036] The second cavity 20 includes a first vertical plate 201, a second vertical plate 202 and a second connecting plate 203. The first vertical plate 201 and the second vertical plate 202 are parallel to each other and have a gap, and the second connecting plate 203 is connected between the edges of the first vertical plate 201 and the second vertical plate 202 to seal the second cavity 20.

[0037] The first cavity 10 and the second cavity 20 are connected in communication, and the connection between the first cavity 10 and the second cavity 20 has a bending angle, thereby forming a bending sealed cavity.

[0038] In the embodiment, the first horizontal plate 101 is connected to one side surface of the first vertical plate 201 and extends away from the first vertical plate 201, and the bending angle is formed between the first horizontal plate 101 and the first vertical plate 201. The second vertical plate 202 is located on the side of the first vertical plate 201 away from the second vertical plate 202, and the second horizontal plate 102 is connected to one side surface of the second vertical plate 202 and extends in the same direction as the first horizontal plate 101, thereby forming the bending angle between the second horizontal plate 102 and the second vertical plate 202, and the first horizontal plate 101 and the first vertical plate 201 are located on the inner side of the bending angle.

[0039] The bending sealed cavity is a vacuum cavity, and a liquid working medium is injected into the cavity. The liquid working medium can be deionized water, ethanol, acetone, etc.

[0040] Preferably, the first horizontal plate 101 and the first vertical plate 201 are integrally connected and the connection is provided with a rounded corner, and the second horizontal plate 102 and the second vertical plate 202 are integrally connected and the connection is provided with a rounded corner, thereby reducing stress concentration at the connection and enhancing stability.

[0041] The first horizontal plate 101, the second horizontal plate 102, the first vertical plate 201, and the second vertical plate 202 can be made of various materials, including copper and its alloys, aluminum and its alloys, stainless steel, PI, etc. Preferably, the first horizontal plate 101, the second horizontal plate 102, the first vertical plate 201, and the second vertical plate 202 are aluminum pieces, so that the bending type uniform heating plate 100 has a lighter mass.

[0042] The liquid absorbing core 30 is laid on the inner surface of the bending sealed cavity, one end of the liquid absorbing core 30 is flush with the end of the first cavity 10 away from the second cavity 20, and the other end of the liquid absorbing core 30 extends along the first cavity 10, passes through the connection between the first cavity 10 and the second cavity 20, and extends to the inner surface of the second cavity 20, and is flush with the end of the second cavity 20 away from the first cavity 10.

[0043] In the embodiment, the liquid absorbing core 30 is laid on the inner surfaces of the first horizontal plate 101 and the first vertical plate 201. Specifically, one end of the liquid absorbing core 30 is flush with the end of the first vertical plate 201 away from the first horizontal plate 101, and the other end of the liquid absorbing core 30 is flush with the end of the first horizontal plate 101 away from the first vertical plate 201, which is conducive to the transmission and diffusion of the liquid working medium in the first cavity 10 in the direction pointing to the second cavity 20.

[0044] The first cavity 10 and the second cavity 20 are provided with a plurality of concave-convex support columns 40 arranged at intervals along the connection of the first cavity 10 and the second cavity 20. Specifically, the concave-convex support column 40 comprises an avoiding portion 41 and an abutting portion 42, the avoiding portion 41 abuts the connection of the first horizontal plate 101 and the first vertical plate 201, and the abutting portion 42 abuts the connection of the second horizontal plate 102 and the second vertical plate 202, which plays a supporting role and shares stress, avoiding wrinkles or collapse at the bending angle.

[0045] The avoiding portion 41 is a concave structure recessed towards the abutting portion 42, and the abutting portion 42 is an arc-shaped convex structure protruding away from the avoiding portion 41. The concave-convex structure can cooperate with the round angle to more effectively disperse and resist stress from various directions.

[0046] Preferably, the first cavity 10 and the second cavity 20 are further provided with a plurality of support columns 50 connected between the first horizontal plate 101 and the second horizontal plate 102, and connected between the first vertical plate 201 and the second vertical plate 202, so that the bending type vapor chamber 100 can maintain a stable shape and structure during work, preventing collapse or damage caused by thermal deformation or external pressure.

[0047] The concave-convex support column 40 and the support column 50 are made of a plurality of materials, including copper and its alloys, aluminum and its alloys, stainless steel, PI, etc. Preferably, the concave-convex support column 40 and the support column 50 are aluminum parts, so that the bending type vapor chamber 100 has a lighter mass.

[0048] Please refer to Figure 3 and Figure 4 , Figure 3 is the overall structure schematic view of the blade battery provided by the utility model; Figure 4 is the front view of the blade battery provided by the utility model along the extension direction of the tab.

[0049] The utility model also provides a blade battery 300 with a vapor chamber, which comprises a battery core 310, two tabs 320 and an insulating heat dissipation assembly 400.

[0050] Two pole ears 320 are arranged on the front and back sides of the length direction of the battery cell 310, and the battery cell 310 further comprises an upper side, a left side, a lower side and a right side which are sequentially connected and form a closed space between the two pole ears 320. The insulation and heat dissipation assembly 400 covers the outer side of the battery cell 310.

[0051] The insulation and heat dissipation assembly 400 comprises two bending type heat plates 100 and two insulation end covers 430. The bending angle of the two bending type heat plates 100 is 90°, and the first horizontal plate 101 and the first vertical plate 201 of one of the two bending type heat plates 100 are tightly attached to the lower side and the left side of the battery cell 310 respectively, and the first horizontal plate 101 and the first vertical plate 201 of the other of the two bending type heat plates 100 are tightly attached to the upper side and the right side of the battery cell 310 respectively, and the two bending type heat plates 100 cover the battery cell 310. The insulation end cover 430 is provided with a through hole 431, and the two insulation end covers 430 are tightly attached to the front side and the back side of the battery cell 310 respectively, and the pole ear 320 passes through the through hole 431 and protrudes outside the insulation and heat dissipation assembly 400.

[0052] Preferably, a heat-conducting mud layer or a heat-conducting silica gel layer is arranged at the joint of the two bending type heat plates 100 and the battery cell 310, so as to enhance the heat dissipation capacity.

[0053] Preferably, the insulation and heat dissipation assembly 400 further comprises an insulation blue film 440 which is attached to and covers the outer side of the second horizontal plate 102 and the second vertical plate 202 of the two bending type heat plates 100 respectively, so as to form a sealed insulation structure together with the two insulation end covers 430, prevent short circuit accidents, and also play a role of fixing and protection.

[0054] Preferably, the insulation and heat dissipation assembly 400 further comprises a liquid cooling plate (not shown in the figure) which is attached to the outer side of the second horizontal plate 102 of the two bending type heat plates 100 respectively, so as to improve the heat dissipation efficiency.

[0055] The utility model provides a kind of bending type heat plate and blade battery with the heat plate, by setting concave-convex support column at the bending of bending type heat plate, avoid the performance decline caused by wrinkle or collapse jam at the bending of bending type heat plate, strengthen the structural strength of bending type heat plate, improve the use reliability of bending type heat plate. While blade battery realizes the rapid heat dissipation of battery cell surface by heat dissipation assembly, avoids the accumulation of heat, guarantees the safety and life of battery.

[0056] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, several modifications and improvements can be made, and the utility model also intends to include these changes and modifications.

Claims

1. A curved heat sink, characterized in that: include: A bent sealed cavity, a liquid absorbent core (30) and a concave-convex support column (40), wherein the liquid absorbent core (30) is laid on the inner surface of one side of the bent sealed cavity, the bent sealed cavity forms a bending angle at the bending portion, and the concave-convex support column (40) is arranged in the bending portion of the bent sealed cavity to support the bending angle.

2. The curved vapor chamber according to claim 1, wherein: The bent sealing cavity comprises a first cavity (10) and a second cavity (20), one side of the first cavity (10) is connected to one side of the second cavity (20), and the bending angle is located at the connection between the first cavity (10) and the second cavity (20).

3. The curved vapor chamber according to claim 2, wherein: The first cavity (10) comprises a first transverse plate (101), a second transverse plate (102) and a first connecting plate (103) connected between the first transverse plate (101) and the second transverse plate (102). The second cavity (20) comprises a first vertical plate (201), a second vertical plate (202) and a second connecting plate (203) connected between the first vertical plate (201) and the second vertical plate (202). The first transverse plate (101) and the first vertical plate (201) are connected at one side and the plate surfaces are not parallel to each other, the second transverse plate (102) and the second vertical plate (202) are connected at one side and the plate surfaces are not parallel to each other, and the second vertical plate (202) is located on the side of the first vertical plate (201) facing away from the first transverse plate (101), and the second transverse plate (102) is located on the side of the first transverse plate (101) facing away from the first vertical plate (201).

4. The curved vapor chamber according to claim 3, wherein: A rounded corner is provided at the connection between the first transverse plate (101) and the first vertical plate (201), and a rounded corner is provided at the connection between the second transverse plate (102) and the second vertical plate (202).

5. The curved vapor chamber according to claim 4, wherein: The concave-convex support column (40) comprises an avoidance portion (41) and an abutment portion (42), wherein the avoidance portion (41) abuts against the connection between the first transverse plate (101) and the first vertical plate (201), and the abutment portion (42) abuts against the connection between the second transverse plate (102) and the second vertical plate (202).

6. The curved vapor chamber according to claim 5, wherein: The avoidance portion (41) is provided with a recessed pit recessed toward the abutting portion (42), and the abutting portion (42) is provided with a protrusion protruding in a direction away from the avoidance portion (41).

7. The curved vapor chamber according to claim 3, wherein: The absorbent core (30) is laid on the inner surface of the second horizontal plate (102) and the second vertical plate (202), one end of the absorbent core (30) is flush with the end of the second vertical plate (202) away from the second horizontal plate (102), and the other end of the absorbent core (30) is flush with the end of the second horizontal plate (102) away from the second vertical plate (202).

8. The curved vapor chamber according to claim 3, wherein: Support columns (50) are also provided in the first cavity (10) and the second cavity (20), and the support columns (50) are connected between the first horizontal plate (101) and the second horizontal plate (102), and between the first vertical plate (201) and the second vertical plate (202).

9. A blade battery with a heat spreader, characterized in that: include: A battery cell (310), two electrode tabs (320), and two bent vapor chambers (100) according to any one of claims 1 to 8, wherein the bending angle of the bent vapor chamber (100) is 90°; The two pole tabs (320) are arranged on the front and rear side surfaces of the battery core (310) in the length direction, and the battery core (310) further includes an upper side surface, a lower side surface, a left side surface, and a right side surface connected between the two pole tabs; The first transverse plate (101) and the first vertical plate (201) of one of the bent heat spreaders (100) are respectively tightly fitted with the lower side surface and the left side surface of the battery cell (310), and the first transverse plate (101) and the first vertical plate (201) of the other bent heat spreader (100) are respectively tightly fitted with the upper side surface and the right side surface of the battery cell (310), and the two bent heat spreaders (100) cover the battery cell (310).

10. The blade battery with a vapor chamber according to claim 9, characterized in that: It also includes two insulating end covers (430) and an insulating blue film (440); Two insulating end covers (430) respectively cover the front side and the rear side of the battery core (310); two pole tabs (320) respectively pass through the two insulating end covers (430) and protrude outside the insulating end covers (430); The insulating blue film (440) is respectively coated on the outer sides of the second transverse plate (102) and the second vertical plate (202) of the two bent heat spreaders (100).

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