A battery heat dissipation structure and battery

Abstract

The present invention discloses a heat dissipation structure of a battery, comprising a metal shell of a battery pack arranged on the outside of a battery cell shell, and also comprising a flexible insulating heat-conducting sheet and a rigid insulating sheet, wherein the flexible insulating heat-conducting sheet is coated on the outside of the battery cell shell, the rigid insulating sheet is coated on the outside of the flexible insulating heat-conducting sheet, and the metal shell of the battery pack is coated on the outside of the rigid insulating sheet; a heat-conducting groove is arranged on the rigid insulating sheet, and the heat-conducting groove is filled with solidified liquid heat-conducting glue; the flexible insulating heat-conducting sheet can be tightly coated on the outside of the battery cell shell, and is reinforced and transitioned by the rigid insulating sheet, a heat-conducting groove or a heat-conducting hole is arranged on the rigid insulating sheet, and the heat-conducting groove or the heat-conducting hole is filled with liquid heat-conducting glue, and the liquid heat-conducting glue will flow to the gap between the metal shell of the battery pack and the flexible insulating heat-conducting sheet, the rigid insulating heat-conducting sheet and the metal shell of the battery pack, and form a tight connection after curing, thereby greatly improving the heat dissipation efficiency and meeting the efficient heat dissipation requirements of the robot fast-charging battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a heat dissipation structure of a battery and a battery. Background Art

[0002] As a mobile carrier of production materials in smart factories and digital workshops, handling robots are mainly powered by lithium-ion batteries as energy storage power sources. When charging the robot, the robot is idle and fails to perform its functions, increasing the user's investment cost. In order to achieve 7*24h operation of smart factories, improve the utilization efficiency of equipment assets, and shorten the investment cost recovery period, by increasing the battery charging rate and reducing the proportion of robot charging time, the asset utilization efficiency of users will be effectively improved.

[0003] During high-rate charging, the battery temperature will rise significantly, placing the battery in a higher temperature operating range. Lithium batteries in a long-term high-temperature environment will shorten their service life and may even trigger the battery system's temperature protection, causing the system to shut down.

[0004] Due to the limitations of the handling robot on battery volume, maintainability, reliability, cost, etc., it is impossible to use heat dissipation methods such as air cooling and liquid cooling. Currently, the battery pack is directly placed in the battery box without effective heat dissipation measures. The battery is in a high temperature environment for a long time, which greatly affects the battery life, or the user gives up the requirement for battery charging speed. Summary of the invention

[0005] The present invention aims to solve the problem of efficient heat dissipation of a robot's fast-charging battery. The present invention has the advantages of high heat dissipation efficiency, low cost, and easy processing.

[0006] The present invention is achieved in that:

[0007] A heat dissipation structure of a battery comprises a metal shell of a battery pack arranged on the outside of a battery cell shell, and also comprises a flexible insulating heat-conducting sheet and a rigid insulating sheet, wherein the flexible insulating heat-conducting sheet is coated on the outside of the battery cell shell, the rigid insulating sheet is coated on the outside of the flexible insulating heat-conducting sheet, and the metal shell of the battery pack is coated on the outside of the rigid insulating sheet; a heat-conducting groove is arranged on the rigid insulating sheet, and the heat-conducting groove is filled with cured liquid heat-conducting glue.

[0008] Preferably, the gap between the flexible insulating thermally conductive sheet and the rigid insulating sheet is filled with liquid thermally conductive adhesive, and the liquid thermally conductive adhesive is in a solidified state;

[0009] The gap between the rigid insulating sheet and the metal shell of the battery pack is filled with liquid thermal conductive adhesive, and the liquid thermal conductive adhesive is in a solidified state.

[0010] Preferably, the liquid thermally conductive adhesive is liquid thermally conductive silicone rubber;

[0011] The liquid thermally conductive silicone adopts AB two-component thermally conductive silicone, which includes component A thermally conductive silicone and component B thermally conductive silicone. Component A thermally conductive silicone and component B thermally conductive silicone are liquid before mixing. After the component A thermally conductive silicone and the component B thermally conductive silicone are mixed in a 1:1 ratio, they are poured onto the inner bottom of the metal shell of the battery pack, and then the rigid insulating sheet is pressed onto the inner bottom of the metal shell of the battery pack. Under the action of siphon, the liquid thermally conductive silicone will automatically fill into the heat conductive groove, the gap between the flexible insulating thermally conductive sheet and the rigid insulating sheet, and the gap between the rigid insulating sheet and the metal shell of the battery pack, and the liquid thermally conductive silicone will solidify after the curing time.

[0012] Preferably, the thermal conductive silicone component A and the thermal conductive silicone component B are PS06A and PS06B glues produced by Shenzhen Dubang Technology Co., Ltd.; of course, the mixed mode of thermal conductive silicone component A and thermal conductive silicone component B is a common usage mode in the glue field.

[0013] Preferably, the flexible insulating thermally conductive sheet is a thermally conductive silicone sheet.

[0014] Preferably, the thickness of the flexible insulating thermally conductive sheet is 1 mm to 2 mm;

[0015] The rigid insulating sheet is a glass fiber board with a thickness of 2mm±0.2mm.

[0016] Preferably, the fiberglass board is embedded with reinforcing ribs that intersect vertically and horizontally, and the heat-conducting grooves are located in the gaps between the reinforcing ribs.

[0017] Preferably, an array of pits is provided on the outer side of the flexible insulating thermal conductive sheet, and the liquid thermal conductive adhesive is filled into the array pits when in liquid state, the depth of the array pits is less than 0.1 mm, the spacing between the array pits is 0.2-0.5 mm, and the length and width of the array pits are both less than 0.2 mm.

[0018] Preferably, a high thermal conductivity wool column is arranged on the inner side of the rigid insulating sheet, the extension length of the high thermal conductivity wool column is 0.11-0.13 mm, the spacing between the high thermal conductivity wool columns is 0.2-0.5 mm, the diameter of the high thermal conductivity wool column is less than 0.1 mm; the high thermal conductivity wool column is embedded in the array pits.

[0019] Preferably, a heat exchange fiber column connected to a high thermal conductivity wool column is embedded in the rigid insulating sheet, and a concave hole is provided on the other side of the rigid insulating sheet, and the concave hole is located at the end of the heat exchange fiber column;

[0020] The liquid thermal conductive adhesive fills into the recessed hole when in liquid state.

[0021] Preferably, the liquid thermally conductive adhesive is filled with nano thermally conductive particles, the diameter of the nano thermally conductive particles is 100-300 nm, and the nano thermally conductive particles are aluminum oxide particles.

[0022] The invention also provides a battery.

[0023] A battery comprises a battery cell, a battery cell shell and a metal shell of a battery pack outside the battery cell shell, and also comprises a flexible insulating thermally conductive sheet and a rigid insulating sheet, wherein the flexible insulating thermally conductive sheet is coated on the outside of the battery cell shell, the rigid insulating sheet is coated on the outside of the flexible insulating thermally conductive sheet, and the metal shell of the battery pack is coated on the outside of the rigid insulating sheet; a heat conduction groove is provided on the rigid insulating sheet, and the heat conduction groove is filled with cured liquid heat conductive glue.

[0024] Preferably, the gap between the flexible insulating thermally conductive sheet and the rigid insulating sheet is filled with liquid thermally conductive adhesive, and the liquid thermally conductive adhesive is in a solidified state;

[0025] The gap between the rigid insulating sheet and the metal shell of the battery pack is filled with liquid thermal conductive adhesive, and the liquid thermal conductive adhesive is in a solidified state.

[0026] Preferably, the liquid thermally conductive adhesive is liquid thermally conductive silicone rubber;

[0027] The liquid thermal conductive silicone adopts AB two-component thermal conductive silicone. The A component thermal conductive silicone and the B component thermal conductive silicone are liquid before mixing. After mixing the A and B thermal conductive silicones in a 1:1 ratio, pour them into the inner bottom of the metal shell of the battery pack, and then press the rigid insulating sheet onto the inner bottom of the metal shell of the battery pack. Under the action of siphon, the liquid thermal conductive silicone will automatically fill into the thermal groove, the gap between the flexible insulating thermal conductive sheet and the rigid insulating sheet, and the gap between the rigid insulating sheet and the metal shell of the battery pack. After the curing time, the liquid thermal conductive silicone cures.

[0028] Preferably, the flexible insulating thermally conductive sheet is a thermally conductive silicone sheet.

[0029] Preferably, the thickness of the flexible insulating thermally conductive sheet is 1 mm to 2 mm;

[0030] The rigid insulating sheet is a glass fiber board with a thickness of 2mm±0.2mm.

[0031] Preferably, the fiberglass board is embedded with reinforcing ribs that intersect vertically and horizontally, and the heat-conducting grooves are located in the gaps between the reinforcing ribs.

[0032] Preferably, an array of pits is provided on the outer side of the flexible insulating thermal conductive sheet, and the liquid thermal conductive adhesive is filled into the array pits when in liquid state, the depth of the array pits is less than 0.1 mm, the spacing between the array pits is 0.2-0.5 mm, and the length and width of the array pits are both less than 0.2 mm.

[0033] Preferably, a high thermal conductivity wool column is arranged on the inner side of the rigid insulating sheet, the extension length of the high thermal conductivity wool column is 0.11-0.13 mm, the spacing between the high thermal conductivity wool columns is 0.2-0.5 mm, the diameter of the high thermal conductivity wool column is less than 0.1 mm; the high thermal conductivity wool column is embedded in the array pits.

[0034] Preferably, a heat exchange fiber column connected to a high thermal conductivity wool column is embedded in the rigid insulating sheet, and a concave hole is provided on the other side of the rigid insulating sheet, and the concave hole is located at the end of the heat exchange fiber column;

[0035] The liquid thermal conductive adhesive fills into the recessed hole when in liquid state.

[0036] Preferably, the liquid thermally conductive adhesive is filled with nano thermally conductive particles, the diameter of the nano thermally conductive particles is 100-300 nm, and the nano thermally conductive particles are aluminum oxide particles.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention discloses a heat dissipation structure of a battery, comprising a battery pack metal shell arranged on the outside of a battery cell shell, and also comprising a flexible insulating heat conductive sheet and a rigid insulating sheet, wherein the flexible insulating heat conductive sheet is coated on the outside of the battery cell shell, the rigid insulating sheet is coated on the outside of the flexible insulating heat conductive sheet, and the battery pack metal shell is coated on the outside of the rigid insulating sheet; a heat conductive groove is arranged on the rigid insulating sheet, and the heat conductive groove is filled with a solidified liquid heat conductive adhesive; the flexible insulating heat conductive sheet can be tightly coated on the outside of the battery cell shell, and is reinforced and transitioned by the rigid insulating sheet, a heat conductive groove or a heat conductive hole is arranged on the rigid insulating sheet, and the liquid heat conductive adhesive is filled in the heat conductive groove or the heat conductive hole, and the liquid heat conductive adhesive flows to the gap between the battery pack metal shell and the flexible insulating heat conductive sheet, the rigid insulating sheet and the battery pack metal shell, and after solidification, a close connection is formed, forming a high-rate heat exchange channel, thereby greatly improving the heat dissipation efficiency and meeting the efficient heat dissipation requirements of the robot fast charging battery. The present invention has the advantages of high heat dissipation efficiency, low cost, and easy processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a structural schematic diagram of a first embodiment of a heat dissipation structure of a battery of the present invention;

[0040] Figure 2 It is a structural schematic diagram of a rigid insulating sheet of a first embodiment of a heat dissipation structure of a battery of the present invention;

[0041] Figure 3 It is a structural schematic diagram of a second embodiment of a heat dissipation structure of a battery of the present invention;

[0042] Figure 4 It is a partial enlarged view of A in the second embodiment of a heat dissipation structure of a battery of the present invention;

[0043] In the figure: 1-battery cell shell; 2-battery pack metal shell; 3-flexible insulating thermal conductive sheet; 31-array pits; 4-rigid insulating sheet; 41-thermal conductive groove; 42-high thermal conductivity wool column; 43-heat exchange fiber column; 44-recessed hole; 5-liquid thermal conductive adhesive. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 shown.

[0046] Embodiment 1

[0047] A heat dissipation structure of a battery includes a battery pack metal shell 2 arranged on the outside of a battery cell shell 1, and also includes a flexible insulating thermally conductive sheet 3 and a rigid insulating sheet 4, wherein the flexible insulating thermally conductive sheet 3 is coated on the outside of the battery cell shell 1, the rigid insulating sheet 4 is coated on the outside of the flexible insulating thermally conductive sheet 3, and the battery pack metal shell 2 is coated on the outside of the rigid insulating sheet 4; a heat conduction groove 41 is provided on the rigid insulating sheet 4, and the heat conduction groove 41 is filled with cured liquid thermally conductive adhesive 5.

[0048] In this embodiment, the gap between the flexible insulating heat-conducting sheet 3 and the rigid insulating sheet 4 is filled with liquid heat-conducting adhesive 5, and the liquid heat-conducting adhesive 5 is in a solidified state;

[0049] The gap between the rigid insulating sheet 4 and the metal shell 2 of the battery pack is filled with liquid thermal conductive adhesive 5, and the liquid thermal conductive adhesive 5 is in a solidified state.

[0050] In this embodiment, the liquid thermally conductive adhesive 5 is liquid thermally conductive silicone rubber;

[0051] The liquid thermally conductive silicone adopts AB two-component thermally conductive silicone, which includes component A thermally conductive silicone and component B thermally conductive silicone. Component A thermally conductive silicone and component B thermally conductive silicone are liquid before mixing. After the component A thermally conductive silicone and the component B thermally conductive silicone are mixed in a 1:1 ratio, they are poured onto the inner bottom of the metal shell 2 of the battery pack, and then the rigid insulating sheet 4 is pressed onto the inner bottom of the metal shell 2 of the battery pack. Under the action of siphon, the liquid thermally conductive silicone will automatically fill into the heat conductive groove 41, the gap between the flexible insulating thermally conductive sheet 3 and the rigid insulating sheet 4, and the gap between the rigid insulating sheet 4 and the metal shell 2 of the battery pack, and the liquid thermally conductive silicone will solidify after the curing time.

[0052] In this embodiment, the flexible insulating heat-conducting sheet 3 is a heat-conducting silicone sheet.

[0053] In this embodiment, the thickness of the flexible insulating thermal conductive sheet 3 is 1 mm to 2 mm;

[0054] The rigid insulating sheet 4 is a glass fiber board with a thickness of 2 mm±0.2 mm.

[0055] The metal shell 2 of the battery pack is coated on the outside of the rigid insulating sheet 4; the rigid insulating sheet 4 is provided with a heat-conducting groove 41, and the heat-conducting groove 41 is filled with solidified liquid thermal conductive adhesive 5; the flexible insulating thermal conductive sheet 3 can be tightly coated on the outside of the battery cell shell 1, and the flexible insulating thermal conductive sheet 3 is positioned, strengthened and flexibly transitioned by the rigid insulating sheet 4, and the rigid insulating sheet 4 is provided with a heat-conducting groove 41 or a heat-conducting hole, and the heat-conducting groove 41 or the heat-conducting hole is filled with liquid thermal conductive adhesive 5, and the liquid thermal conductive adhesive 5 can flow in the initial state, and the liquid thermal conductive adhesive 5 in the liquid state will flow to the metal shell 2 of the battery pack and the flexible insulating thermal conductive sheet 3, Rigid absolute Edge piece The gap between the battery pack metal shell 4 and the battery pack metal shell 2 forms a tight connection after solidification, forming a high-rate heat exchange channel, thereby greatly improving the heat dissipation efficiency and meeting the efficient heat dissipation requirements of the robot's fast-charging battery.

[0056] Embodiment 2

[0057] A heat dissipation structure of a battery includes a battery pack metal shell 2 arranged on the outside of a battery cell shell 1, and also includes a flexible insulating thermally conductive sheet 3 and a rigid insulating sheet 4, wherein the flexible insulating thermally conductive sheet 3 is coated on the outside of the battery cell shell 1, the rigid insulating sheet 4 is coated on the outside of the flexible insulating thermally conductive sheet 3, and the battery pack metal shell 2 is coated on the outside of the rigid insulating sheet 4; a heat conduction groove 41 is provided on the rigid insulating sheet 4, and the heat conduction groove 41 is filled with cured liquid thermally conductive adhesive 5.

[0058] The present invention has the advantages of high heat dissipation efficiency, low cost, easy processing and the like.

[0059] In this embodiment, the gap between the flexible insulating heat-conducting sheet 3 and the rigid insulating sheet 4 is filled with liquid heat-conducting adhesive 5, and the liquid heat-conducting adhesive 5 is in a solidified state;

[0060] The gap between the rigid insulating sheet 4 and the metal shell 2 of the battery pack is filled with liquid thermal conductive adhesive 5, and the liquid thermal conductive adhesive 5 is in a solidified state.

[0061] In this embodiment, the liquid thermally conductive adhesive 5 is liquid thermally conductive silicone rubber;

[0062] The liquid thermally conductive silicone adopts AB two-component thermally conductive silicone, which includes component A thermally conductive silicone and component B thermally conductive silicone. Component A thermally conductive silicone and component B thermally conductive silicone are liquid before mixing. After the component A thermally conductive silicone and the component B thermally conductive silicone are mixed in a 1:1 ratio, they are poured onto the inner bottom of the metal shell 2 of the battery pack, and then the rigid insulating sheet 4 is pressed onto the inner bottom of the metal shell 2 of the battery pack. Under the action of siphon, the liquid thermally conductive silicone will automatically fill into the heat conductive groove 41, the gap between the flexible insulating thermally conductive sheet 3 and the rigid insulating sheet 4, and the gap between the rigid insulating sheet 4 and the metal shell 2 of the battery pack, and the liquid thermally conductive silicone will solidify after the curing time.

[0063] In this embodiment, the flexible insulating heat-conducting sheet 3 is a heat-conducting silicone sheet.

[0064] In this embodiment, the thickness of the flexible insulating thermal conductive sheet 3 is 1 mm to 2 mm;

[0065] The rigid insulating sheet 4 is a glass fiber board with a thickness of 2 mm±0.2 mm.

[0066] In this embodiment, the glass fiber board is embedded with reinforcing ribs that intersect vertically and horizontally, and the heat conduction grooves 41 are located in the gaps between the reinforcing ribs.

[0067] In this embodiment, an array of pits 31 is provided on the outer side of the flexible insulating thermal conductive sheet 3. The liquid thermal conductive adhesive 5 is filled into the array of pits 31 when in liquid state. The depth of the array of pits 31 is less than 0.1 mm, the spacing between the array of pits 31 is 0.2 to 0.5 mm, and the length and width of the array of pits 31 are both less than 0.2 mm.

[0068] In this embodiment, a high thermal conductivity wool column 42 is provided on the inner side of the rigid insulating sheet 4, the protruding length of the high thermal conductivity wool column 42 is 0.11-0.13 mm, the spacing between the high thermal conductivity wool columns 42 is 0.2-0.5 mm, and the diameter of the high thermal conductivity wool columns 42 is less than 0.1 mm; the high thermal conductivity wool columns 42 are embedded in the array pits 31.

[0069] In this embodiment, a heat exchange fiber column 43 connected to a high thermal conductivity wool column 42 is embedded in the rigid insulating sheet 4, and a concave hole 44 is provided on the other side of the rigid insulating sheet 4, and the concave hole 44 is located at the end of the heat exchange fiber column 43;

[0070] The liquid heat-conducting adhesive 5 fills into the concave hole 44 when in liquid state.

[0071] In this embodiment, the liquid thermal conductive adhesive 5 is filled with nano thermal conductive particles, the diameter of the nano thermal conductive particles is 100-300 nm, and the nano thermal conductive particles are aluminum oxide particles.

[0072] In this embodiment, the battery heat dissipation system is composed of five parts: a battery cell shell 1, a flexible insulating heat-conducting sheet 3, a rigid insulating sheet 4, a liquid thermally conductive adhesive 5, and a battery pack metal shell 2.

[0073] Battery cell shell 1: The outermost shell of the battery cell, through which the heat of the battery cell is transferred to the outside.

[0074] Flexible insulating thermally conductive sheet 3: The flexible insulating thermally conductive sheet 3 is a thermally conductive silicone sheet. The flexible insulating thermally conductive sheet 3 is attached between the battery cell housing 1 and the rigid insulating sheet 4 to fill the battery cell housing 1 and the rigid insulating sheet 4 tightly, reduce the air gap between the battery cell housing 1 and the rigid insulating sheet, and increase the thermal conductivity. The rigid insulating sheet 4 is provided with a thermally conductive groove 41 / or a thermally conductive hole. The rigid insulating sheet 4 and the thermally conductive groove 41 are provided to ensure that the battery cell can be evenly stressed; there should not be a part of the battery cell without the support of the rigid insulating sheet 4, and the other part of the battery cell is completely surrounded by the rigid insulating sheet 4. When all are surrounded by the rigid insulating sheet 4, due to the low thermal conductivity of the rigid insulating sheet 4, the thermal conductivity efficiency will be low. The position without the support of the rigid insulating sheet 4 is all liquid thermally conductive glue 5. The liquid thermally conductive glue 5 is thermally conductive silicone. Although the thermal conductivity efficiency is high, the thermally conductive silicone is relatively soft and cannot provide sufficient support for the battery cell, which can easily cause uneven stress on the battery cell and damage the battery structure.

[0075] The liquid thermal conductive adhesive 5 adopts AB two-component thermal conductive silicone. The thermal conductive silicone of component A and the thermal conductive silicone of component B are liquid before mixing. After the thermal conductive silicone of component A and the thermal conductive silicone of component B are mixed in a 1:1 ratio, they are poured onto the bottom inner side of the metal shell 2 of the battery pack, and then the rigid insulating sheet 4 is pressed onto the bottom inner side of the metal shell 2 of the battery pack. The liquid thermal conductive adhesive 5 will automatically fill into the thermal conductive groove 41 / hole of the rigid insulating sheet 4 under the action of siphon or surface tension, and the thermal conductive silicone will solidify after the curing time.

[0076] Rigid insulating sheet 4: Rigid insulating sheet 4 is generally made of glass fiber board, which has fire retardant properties and good puncture resistance. A heat-conducting groove 41 / hole with a certain porosity is processed on the rigid insulating sheet. In theory, the larger the porosity, the better, but the strength of the rigid insulating sheet 4 must be considered, so the porosity size needs to be comprehensively considered according to different structures, processing technology, cost factors, heat dissipation efficiency and other factors. The size and shape of the heat-conducting groove / hole can be determined according to the shape and size of the battery cell to ensure that the battery cell can be evenly stressed. There should not be a part of the battery cell without rigid insulating sheet support, and a part of the battery cell is fully supported by the rigid insulating sheet. If all of the batteries are supported by the rigid insulating sheet, the thermal conductivity coefficient of the rigid insulating sheet is too low, which will cause low thermal efficiency. The positions without rigid insulating sheet support are all thermal conductive silicone. Although the thermal conductivity efficiency is high, the thermal conductive silicone is relatively soft and cannot provide sufficient support for the battery cell, which can easily cause uneven stress on the battery cell and damage the battery structure. Due to the low thermal conductivity of the rigid insulating material, it is necessary to open a heat-conducting groove / hole on the rigid insulating material, and the heat-conducting groove / hole is used to fill the liquid thermal conductive glue.

[0077] The heat conduction groove / hole is a through hole, generally 1-2mm, with no special treatment on both sides. The heat of the flexible insulating thermal conductive sheet is transferred to the metal shell of the battery pack through the liquid thermal conductive adhesive. The rigid insulating sheet can protect the flexible insulating thermal conductive sheet from damage, effectively avoiding the occurrence of short circuit of the battery cell through the battery shell caused by damage to the flexible insulating thermal conductive sheet and liquid thermal conductive adhesive, which is convenient for production and manufacturing.

[0078] Liquid thermal conductive adhesive 5: When assembling the battery cell shell 1, the flexible insulating thermal conductive sheet 3, the rigid insulating sheet 4, and the battery pack metal shell 2, the liquid thermal conductive silicone is filled between the battery pack metal shell 2 and the flexible insulating thermal conductive sheet 3, so that the liquid thermal conductive silicone fully fills the gap between the flexible insulating thermal conductive sheet and the battery shell and the space of the thermal conductive groove / hole; it can be understood that the liquid thermal conductive silicone is located in three positions: ① the gap between the flexible insulating thermal conductive sheet and the rigid insulating sheet; ② the gap between the rigid insulating sheet and the battery shell; ③ the thermal conductive groove / hole.

[0079] Generally, the flexible insulating thermal conductive sheet is 1-2mm thick, and the rigid insulating sheet is a 2mm thick fiberglass board. The size and spacing of the slots are determined according to the size of the battery cell. The liquid thermal conductive adhesive solidifies itself after a period of time, effectively reducing the thermal resistance between the battery cell shell 1 and the metal shell of the battery pack, increasing the heat transfer efficiency, and reducing the temperature inside the battery.

[0080] The present invention can effectively reduce the operating temperature of the battery pack, improve the service life and operating safety of the battery pack, is easy to produce, and the entire heat dissipation device has no wearing parts and is highly reliable.

[0081] The device obtained through the above design can basically meet the needs of collecting exhaust gas generated in the electroplating production of circuit boards, thereby using electroplating tanks of different sizes for recycling and improving the use of the heat dissipation structure of the recycled batteries with good sealing. However, in order to further improve its functions, the designer has made further improvements to the device.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat dissipation structure of a battery, comprising a battery pack metal shell (2) arranged outside a battery cell shell (1), characterized in that: It also comprises a flexible insulating heat-conducting sheet (3) and a rigid insulating sheet (4), wherein the flexible insulating heat-conducting sheet (3) is coated on the outer side of the battery cell shell (1), the rigid insulating sheet (4) is coated on the outer side of the flexible insulating heat-conducting sheet (3), and the battery pack metal shell (2) is coated on the outer side of the rigid insulating sheet (4); a heat-conducting groove (41) is provided on the rigid insulating sheet (4), and the heat-conducting groove (41) is filled with a solidified liquid heat-conducting adhesive (5); the gap between the flexible insulating heat-conducting sheet (3) and the rigid insulating sheet (4) is filled with the liquid heat-conducting adhesive (5), and after a solidification time, the liquid heat-conducting adhesive (5) is in a solidified state; The gap between the rigid insulating sheet (4) and the metal shell (2) of the battery pack is filled with liquid thermally conductive adhesive (5), and after a curing time, the liquid thermally conductive adhesive (5) is in a cured state; the liquid thermally conductive adhesive (5) is liquid thermally conductive silica gel; The liquid thermally conductive silicone adopts AB two-component thermally conductive silicone, which includes A component thermally conductive silicone and B component thermally conductive silicone. The A component thermally conductive silicone and the B component thermally conductive silicone are liquid before being mixed. After the A component thermally conductive silicone and the B component thermally conductive silicone are mixed in a ratio of 1:1, they are poured onto the inner bottom of the metal shell (2) of the battery pack. Then, the rigid insulating sheet (4) is pressed onto the inner bottom of the metal shell (2) of the battery pack. Under the action of siphon, the liquid thermally conductive silicone will automatically fill into the heat conductive groove (41), the gap between the flexible insulating thermally conductive sheet (3) and the rigid insulating sheet (4), and the gap between the rigid insulating sheet (4) and the metal shell (2) of the battery pack. After the curing time, the liquid thermally conductive silicone is cured. The flexible insulating thermally conductive sheet (3) is a thermally conductive silicone sheet. The thickness of the flexible insulating thermally conductive sheet (3) is 1 mm to 2 mm. The rigid insulating sheet (4) is a glass fiber board with a thickness of 2 mm ± 0.2 mm; the glass fiber board is embedded with reinforcing ribs intersecting vertically and horizontally, and the heat conduction groove (41) is located in the gap between the reinforcing ribs; the outer side of the flexible insulating heat conductive sheet (3) is provided with an array of pits (31), and the liquid heat conductive glue (5) is filled into the array of pits (31) when in liquid state, the depth of the array of pits (31) is less than 0.1 mm, and the spacing between the array of pits (31) is 0.2 to 100 mm. 0.5mm, the length and width of the array pit (31) are both less than 0.2mm; a high thermal conductivity wool column (42) is arranged on the inner side of the rigid insulating sheet (4), the protruding length of the high thermal conductivity wool column (42) is 0.11-0.13mm, the spacing between the high thermal conductivity wool columns (42) is 0.2-0.5mm, and the diameter of the high thermal conductivity wool column (42) is less than 0.1mm; the high thermal conductivity wool column (42) is embedded in the array pit (31).

2. The heat dissipation structure of the battery as claimed in claim 1, characterized in that: A heat exchange fiber column (43) connected to the high thermal conductivity wool column (42) is embedded in the rigid insulating sheet (4), and a concave hole (44) is provided on the other side of the rigid insulating sheet (4), and the concave hole (44) is located at the end of the heat exchange fiber column (43); The liquid heat-conducting adhesive (5) is filled into the concave hole (44) when in liquid state.

3. A battery, characterized in that: A heat dissipation structure comprising the battery according to any one of claims 1 to 2.

Images