High-air-permeability storage battery shell for new energy automobile

Abstract

The invention discloses a high-air-permeability storage battery shell for a new energy automobile, and relates to the technical field of new energy automobile batteries, the high-air-permeability storage battery shell comprises a storage battery shell main body, the storage battery shell main body comprises a substrate, and a high-air-permeability sleeve shell structure is arranged above the substrate; and a breathable protective sealing cover structure is arranged above the high-breathability sleeve shell structure. The outer sleeve shell and the inner sleeve shell are combined into a double-layer sleeve shell, the space between the outer sleeve shell and the inner sleeve shell is a heat dissipation ventilation channel, the heat dissipation grooves facilitate ventilation and heat dissipation of the outer sleeve shell, and the expansion push plate and the heat dissipation silica gel pad are connected into a whole and clamped on the heat dissipation grooves. And the reset elastic plate pushes the expansion push plate inwards by utilizing the elasticity of the reset elastic plate, so that the heat dissipation silica gel pad just blocks the heat dissipation groove, the sealing performance and the safety of the storage battery are ensured, and when the internal temperature rises rapidly, the internal air expands to push the expansion push plate to push the expansion push plate outwards, so that the heat dissipation groove is exposed for ventilation and heat dissipation.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle batteries, and particularly relates to a high air permeability battery case for new energy vehicles. Background Art

[0002] New energy vehicles are divided into three categories: pure electric vehicles, hybrid electric vehicles, and fuel cell vehicles. Among them, pure electric vehicles and hybrid electric vehicles are the most common types of new energy vehicles in the Chinese market. New energy vehicles use lithium-ion batteries, which are secondary batteries and mainly consist of four parts: positive electrode material, negative electrode material, separator, and electrolyte. Among them, the positive electrode material is the most critical raw material for lithium-ion batteries, accounting for more than 40% of the total cost of lithium-ion batteries. Its essence is to utilize the insertion and extraction of lithium ions and the redox reaction of transition metals to achieve the mutual conversion of chemical energy and electrical energy, and it is a device that directly converts chemical energy into electrical energy. It is a rechargeable battery designed according to the principle of rechargeability and realizes recharge through reversible chemical reactions. Currently, the battery cases on the market seal the rubber cap holes for filling the electrolyte to prevent electrolyte leakage and then cover a sealing cover on the upper side of the rubber cap holes. However, this also makes it difficult for the air inside the battery case to communicate with the outside air, which may result in an air pressure difference inside and outside, thus causing the battery case to deform or even be damaged. Therefore, the present invention proposes a high air permeability battery case for new energy vehicles.

[0003] In the prior art, a Chinese patent document with the publication number CN101521266B and the publication date of February 20, 2013 was proposed to solve the above technical problems. The technical solution disclosed in the patent document is as follows: A battery case (1) includes at least two case components (2, 3, 4, 5), and the case components at least partially enclose a case inner cavity (10). According to the present invention, at least one ventilation channel (7) is provided between the case components (2, 3, 4, 5), and the ventilation channel can realize air exchange between the case inner cavity (10) and the environment (8).

[0004] In order to solve the problem that it is difficult to use an effective ventilation grille when the battery case has a case shell layer that closely adheres to the battery, the prior art deals with it by forming the ventilation channel by reducing the gap between the button that should form the case component and another case component. The gap is preferably a gap surrounding the button. However, there will still be a situation where only the ventilation channel is used to ventilate the battery case, which may lead to the problem that the void of the ventilation channel makes the battery body not stably supported. Summary of the Invention

[0005] The present invention provides a high air permeability battery case for new energy vehicles to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A highly breathable battery case for a new energy vehicle, including a battery case main body. The battery case main body includes a substrate, a highly breathable sleeve structure is arranged above the substrate, and a breathable protection cover structure is arranged above the highly breathable sleeve structure; the highly breathable sleeve structure includes an outer sleeve unit and an inner sleeve unit. The outer sleeve unit is arranged on the upper surface of the substrate, and the inner sleeve unit is arranged inside the outer sleeve unit; the breathable protection cover structure includes a cover unit and a temperature control heat dissipation unit. The cover unit is arranged above the outer sleeve unit, and the temperature control heat dissipation unit is arranged on the top of the cover unit.

[0007] A further improvement of the technical solution of the present invention lies in that: the outer sleeve unit includes an outer sleeve fixedly installed on the upper surface of the substrate. Air inlets are arranged at the bottoms of both side walls of the outer sleeve, and heat dissipation grooves are arranged on the side walls of the outer sleeve.

[0008] Adopting the above technical solution, the heat dissipation grooves and the air inlets facilitate the outer sleeve to conduct breathable heat dissipation.

[0009] A further improvement of the technical solution of the present invention lies in that: a heat dissipation silica gel pad is arranged outside the heat dissipation groove. An expansion push plate is fixedly installed on the inner surface of the heat dissipation silica gel pad, and the expansion push plate is snap-fitted in the heat dissipation groove.

[0010] Adopting the above technical solution, the heat dissipation silica gel pad is made of heat dissipation silica gel pad material, and the expansion push plate is made of lightweight plastic material.

[0011] A further improvement of the technical solution of the present invention lies in that: reset elastic plates are arranged on both sides of the heat dissipation groove. The outer ends of the reset elastic plates are fixedly connected to the inner surface of the outer sleeve, and the inner sides of the reset elastic plates are in contact with the inner surface of the expansion push plate.

[0012] Adopting the above technical solution, the reset elastic plate is made of elastic plastic material, and the reset elastic plate also has the function of guiding air on both sides of the heat dissipation groove.

[0013] A further improvement of the technical solution of the present invention lies in that: the inner sleeve unit includes an inner sleeve fixedly installed in the middle of the upper surface of the substrate. Air inlet inner openings are arranged at the bottoms of both side walls of the inner sleeve, and the positions of the air inlet inner openings are adapted to the positions of the air inlets.

[0014] Adopting the above technical solution, the inner sleeve is made of breathable material, and the air inlet inner openings facilitate cold air to enter the inside of the inner sleeve.

[0015] A further improvement of the technical solution of the present invention lies in that: a battery panel placement groove is provided on the left inner wall of the inner casing, an insulating protection backing plate is provided outside the battery panel placement groove, and the insulating protection backing plate is embedded in the left side wall of the inner casing.

[0016] With the above technical solution, the battery panel placement groove creates a space for independent placement and protection of the battery panel, and the insulating protection backing plate plays a role of insulating protection outside the battery panel.

[0017] A further improvement of the technical solution of the present invention lies in that: a buffer partition is fixedly installed in the middle of the inner casing, air permeation grooves are provided on the side wall of the buffer partition, and a battery pack placement partition is fixedly installed on the side wall surface of the buffer partition.

[0018] With the above technical solution, the inside of the buffer partition is a hollow and arc-shaped partition, which has a certain anti-stamping and buffering effect, and the battery pack placement partition separates individual battery packs so that air can permeate and dissipate heat between battery monomers.

[0019] A further improvement of the technical solution of the present invention lies in that: a bottom heat dissipation and air permeation groove body is provided at the bottom of the inner casing, the lower surface of the bottom heat dissipation and air permeation groove body is fixedly connected to the upper surface of the substrate, and the position of the bottom heat dissipation and air permeation groove body is adapted to the position of the battery pack placement partition.

[0020] With the above technical solution, the bottom heat dissipation and air permeation groove body is an annular groove, enabling air to permeate and dissipate heat at the bottom of the battery monomer.

[0021] A further improvement of the technical solution of the present invention lies in that: the capping unit includes a cap snap-fitted and installed above the outer casing, a heat dissipation arc groove is provided at the top of the cap, and an explosion-proof net is fixedly installed at the bottom of the inner surface of the cap.

[0022] With the above technical solution, the explosion-proof net is a concave arc-shaped net, which has a certain anti-impact protection effect.

[0023] A further improvement of the technical solution of the present invention lies in that: the temperature control and heat dissipation unit includes a heat dissipation exhaust fan fixedly installed at the center of the top of the cap, a temperature sensor is provided on one side of the heat dissipation exhaust fan, the temperature sensor is fixedly installed on the inner wall of the top of the cap, and the output end of the temperature sensor is electrically connected to the control input end of the heat dissipation exhaust fan.

[0024] With the above technical solution, the temperature sensor and the heat dissipation exhaust fan involve circuits and electronic components, which are all prior arts and can be fully realized by those skilled in the art, so no further elaboration will be made here.

[0025] Due to the adoption of the above technical solution, the technical progress achieved by the present invention compared with the prior art is: 1. The present invention provides a highly breathable battery case for new energy vehicles. The outer shell and the inner shell are combined to form a double-layer shell. The space between the outer shell and the inner shell is a heat dissipation and ventilation channel. The heat dissipation slots facilitate the ventilation and heat dissipation of the outer shell. The expansion push plate and the heat dissipation silica gel pad are connected as one body and clamped on the heat dissipation slots. When the temperature is appropriate, the reset elastic plate uses its own elasticity to push the expansion push plate inward, so that the heat dissipation silica gel pad just blocks the heat dissipation slots, ensuring the sealing and safety of the battery. When the internal temperature rises rapidly, the internal air expands and pushes the expansion push plate outward, exposing the heat dissipation slots for ventilation and heat dissipation.

[0026] 2. The present invention provides a highly breathable battery case for new energy vehicles. The heat dissipation silica gel pad itself has the functions of absorbing and dissipating heat, and at the same time has an insulating protection function. The inner shell is a lightweight breathable board, which provides protection for the internal battery packs and battery plates. At the same time, the special interval design of the expansion push plate and the reset elastic plate plays a buffering and protecting role for the inner shell.

[0027] 3. The present invention provides a highly breathable battery case for new energy vehicles. The battery plate placement groove is convenient for placing the battery plates. The insulating protection backing plate provides insulating protection for the battery plates. The buffer partition separates the battery packs. The battery pack placement partition corresponds to the bottom heat dissipation and ventilation trough body, so that the battery packs are placed at equal intervals stably. The battery pack placement partition and the buffer partition provide buffering protection for individual batteries. The ventilation slots ensure the internal air permeability, enabling the battery packs to ventilate and dissipate heat, ensuring uniform heat dissipation and avoiding abnormal local temperature rise.

[0028] 4. The present invention provides a highly breathable battery case for new energy vehicles. The cover is fixed to the mounting posts of the substrate by bolts and is sealed after the battery packs are assembled. When the temperature sensor reaches the preset value, it prompts the heat dissipation exhaust fan to work, and the internal hot air is extracted and discharged through the heat dissipation arc-shaped groove. The internal part is in negative pressure, so that the cold air enters through the air inlet and the inner air inlet. The bottom heat dissipation and ventilation trough body is an annular groove, which cooperates with the cold air to accelerate the air exchange from the bottom to the top of the battery packs, improving the heat dissipation rate. The explosion-proof net adopts an arc-shaped partition net, which has a certain impact resistance and improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic diagram of the opened cover of the structure of the present invention; Figure 3 is a schematic structural diagram of the highly breathable shell structure of the present invention; Figure 4 is a schematic diagram of the outer shell of the structure of the present invention; Figure 5 is a schematic diagram of the inside of the cover of the structure of the present invention; Figure 6 Schematic diagram of the structural buffer partition of the present invention; Figure 7 Schematic sectional view of the structure of the present invention.

[0030] Figure 8 Schematic diagram of the structural expansion push plate of the present invention; Figure 9 Enlarged schematic view of part A of the structure of the present invention.

[0031] In the figure: 1. Main body of the battery case; 11. Substrate; 2. High-air-permeability housing structure; 21. Outer housing; 211. Air inlet; 212. Heat dissipation groove; 22. Heat dissipation silica gel pad; 23. Expansion push plate; 24. Reset elastic plate; 25. Inner housing; 251. Inner air inlet; 26. Battery plate placement groove; 27. Insulating protection backing plate; 28. Buffer partition; 281. Air permeation groove; 282. Battery pack placement partition; 29. Bottom heat dissipation and air permeation trough body; 3. Air permeation protection cover structure; 31. Cover; 311. Heat dissipation arc groove; 32. Explosion-proof net; 33. Heat dissipation exhaust fan; 34. Temperature sensor. Detailed implementation manners

[0032] The following further describes the present invention in detail with reference to embodiments: Embodiment 1

[0033] As Figures 1-9 shown, the present invention provides a high-air-permeability battery case for a new energy vehicle, including a main body 1 of the battery case. The main body 1 of the battery case includes a substrate 11. Above the substrate 11, there is a high-air-permeability housing structure 2, and above the high-air-permeability housing structure 2, there is an air permeation protection cover structure 3; the high-air-permeability housing structure 2 includes an outer housing unit and an inner housing unit. The outer housing unit is arranged on the upper surface of the substrate 11, and the inner housing unit is arranged inside the outer housing unit; the air permeation protection cover structure 3 includes a cover unit and a temperature-controlled heat dissipation unit. The cover unit is arranged above the outer housing unit, and the temperature-controlled heat dissipation unit is arranged on the top of the cover unit. The outer housing unit includes an outer housing 21 fixedly installed on the upper surface of the substrate 11. At the bottom of both side walls of the outer housing 21, there are air inlets 211, and on the side wall of the outer housing 21, there are heat dissipation grooves 212. The outer housing 21 and the inner housing 25 form a double-layer housing, and the space between the outer housing 21 and the inner housing 25 is a heat dissipation and air permeation channel. The heat dissipation grooves 212 facilitate the outer housing 21 to conduct air permeation and heat dissipation. On the outside of the heat dissipation grooves 212, there is a heat dissipation silica gel pad 22, and on the inner surface of the heat dissipation silica gel pad 22, there is an expansion push plate 23 fixedly installed. The expansion push plate 23 is snap-fitted in the heat dissipation grooves 212, and the expansion push plate 23 and the heat dissipation silica gel pad 22 are connected as a whole and snap-fitted on the heat dissipation grooves 212.

[0034] Furthermore, when the temperature is suitable, the reset elastic plate 24 uses its own elasticity to push the expansion push plate 23 inward, so that the heat dissipation silica gel pad 22 exactly blocks the heat dissipation slot 212, ensuring the sealing and safety of the storage battery. When the internal temperature rises rapidly, the internal air expands and pushes the expansion push plate 23 outward, causing the heat dissipation slot 212 to be exposed for ventilation and heat dissipation. Embodiment 2

[0035] As Figures 1-9 shown, on the basis of Embodiment 1, the present invention provides a technical solution: Preferably, reset elastic plates 24 are arranged on both sides of the heat dissipation slot 212. The outer ends of the reset elastic plates 24 are fixedly connected to the inner surface of the outer casing 21. The inner sides of the reset elastic plates 24 are in contact with the inner side surfaces of the expansion push plates 23. The heat dissipation silica gel pad 22 itself has the functions of absorbing and dissipating heat, and at the same time has an insulating protection function. The inner casing unit includes an inner casing 25 fixedly installed in the middle of the upper surface of the substrate 11. Air inlet openings 251 are arranged at the bottoms of both side walls of the inner casing 25. The positions of the air inlet openings 251 are adapted to the positions of the air inlets 211. The inner casing 25 is a lightweight breathable plate, which provides protection for the internal battery packs and battery plates. At the same time, the special interval design of the expansion push plate 23 and the reset elastic plate 24 plays a buffering and protecting role for the inner casing 25. Embodiment 3

[0036] As Figures 1-9 shown, on the basis of Embodiments 1-2, the present invention provides a technical solution: Preferably, a battery plate placement groove 26 is arranged on the left inner wall of the inner casing 25. An insulating protection backing plate 27 is arranged outside the battery plate placement groove 26. The insulating protection backing plate 27 is embedded in the left side wall of the inner casing 25. The battery plate placement groove 26 is convenient for placing battery plates. The insulating protection backing plate 27 provides insulating protection for the battery plates. The buffer partition 28 spaces the battery packs. A buffer partition 28 is fixedly installed in the middle of the inner casing 25. Ventilation grooves 281 are arranged on the side walls of the buffer partition 28. Battery pack placement partitions 282 are fixedly installed on the side wall surfaces of the buffer partition 28. The battery pack placement partitions 282 correspond to the positions of the bottom heat dissipation and ventilation groove body 29, so that the battery packs are placed at equal intervals stably. The battery pack placement partitions 282 and the buffer partition 28 provide buffer protection for individual batteries. A bottom heat dissipation and ventilation groove body 29 is arranged at the bottom of the inner casing 25. The lower surface of the bottom heat dissipation and ventilation groove body 29 is fixedly connected to the upper surface of the substrate 11. The position of the bottom heat dissipation and ventilation groove body 29 is adapted to the position of the battery pack placement partition 282. The ventilation grooves 281 ensure the internal ventilation, enabling the battery packs to ventilate and dissipate heat, ensuring uniform heat dissipation, and avoiding abnormal local temperature rise. Embodiment 4

[0037] As Figures 1-9As shown, based on Embodiments 1-3, the present invention provides a technical solution: Preferably, the capping unit includes a cap 31 snap-fitted and installed above the outer casing 21. A heat dissipation arc groove 311 is provided at the top of the cap 31. An explosion-proof net 32 is fixedly installed at the bottom of the inner surface of the cap 31. The cap 31 is fixed to the mounting post of the substrate 11 by bolts. After the battery pack is assembled, the cap is installed. When the temperature sensor 34 reaches the preset value, it prompts the heat dissipation exhaust fan 33 to work to extract and discharge the internal hot air through the heat dissipation arc groove 311. The temperature control heat dissipation unit includes a heat dissipation exhaust fan 33 fixedly installed at the center of the top of the cap 31. A temperature sensor 34 is provided on one side of the heat dissipation exhaust fan 33. The temperature sensor 34 is fixedly installed on the inner wall of the top of the cap 31. The output end of the temperature sensor 34 is electrically connected to the control input end of the heat dissipation exhaust fan 33. The interior is in a negative pressure state, so that cold air enters through the air inlet 211 and the inner air inlet 251. The bottom heat dissipation ventilation trough body 29 is an annular groove, which cooperates with the cold air to accelerate the air exchange from the bottom to the top of the battery pack, improving the heat dissipation rate. The explosion-proof net 32 is an arc-shaped partition net, which has a certain impact resistance and improves safety.

[0038] Next, the working principle of the highly breathable battery housing for new energy vehicles will be specifically described.

[0039] As Figures 1-9 shown, first, the battery cells are installed between the battery pack placement partitions 282. The battery pack placement partitions 282 and the buffer partitions 28 buffer and protect the individual batteries. The ventilation slots 281 ensure the internal breathability so that the battery packs can ventilate and dissipate heat. The circuit board is installed inside the battery board placement slot 26 to connect the circuits. The insulating protection backing plate 27 insulates and protects the battery board. After ensuring that the wiring heads of the circuit board pass through the line holes of the cap 31, the cap 31 is covered and fixed with bolts. Then, the space between the outer casing 21 and the inner casing 25 is a heat dissipation ventilation channel. The reset elastic plate 24 uses its own elasticity to push the expansion push plate 23 inward, so that the heat dissipation silica gel pad 22 just blocks the heat dissipation slot 212, ensuring the sealing and safety of the storage battery. When the internal temperature rises rapidly, the internal air expands and pushes the expansion push plate 23 outward, so that the heat dissipation slot 212 is exposed for ventilation and heat dissipation. Finally, when the temperature sensor 34 reaches the preset value, it prompts the heat dissipation exhaust fan 33 to work to extract and discharge the internal hot air through the heat dissipation arc groove 311. The interior is in a negative pressure state, so that cold air enters through the air inlet 211 and the inner air inlet 251. The bottom heat dissipation ventilation trough body 29 is an annular groove, which cooperates with the cold air to accelerate the air exchange from the bottom to the top of the battery pack, improving the heat dissipation rate.

[0040] The above has generally described the present invention in detail. However, based on the present invention, some modifications or improvements can be made thereto, which are obvious to those of ordinary skill in the art. Therefore, any modifications or improvements made without departing from the spirit and concept of the present invention fall within the protection scope of the present invention.

Claims

1. A high-air-permeability battery housing for a new energy vehicle, comprising a battery housing main body (1), and the battery housing main body (1) includes a substrate (11), characterized in that: Above the substrate (11), a high-air-permeability housing structure (2) is provided, and above the high-air-permeability housing structure (2), a breathable protective cover structure (3) is provided; The high-air-permeability housing structure (2) includes an outer housing unit and an inner housing unit. The outer housing unit is arranged on the upper surface of the substrate (11), and the inner housing unit is arranged inside the outer housing unit; The breathable protective cover structure (3) includes a cover unit and a temperature control and heat dissipation unit. The cover unit is arranged above the outer housing unit, and the temperature control and heat dissipation unit is arranged on the top of the cover unit.

2. The high-permeability battery housing for a new energy vehicle according to claim 1, wherein: The outer housing unit includes an outer housing (21) fixedly installed on the upper surface of the substrate (11). Air inlets (211) are provided at the bottoms of both side walls of the outer housing (21), and heat dissipation grooves (212) are provided on the side walls of the outer housing (21).

3. The high-air-permeability battery housing for a new energy vehicle according to claim 2, wherein: A heat dissipation silica gel pad (22) is arranged outside the heat dissipation groove (212). An expansion push plate (23) is fixedly installed on the inner surface of the heat dissipation silica gel pad (22), and the expansion push plate (23) is snap-fitted in the heat dissipation groove (212).

4. The high-permeability battery housing for a new energy vehicle according to claim 3, characterized in that: Reset elastic plates (24) are provided on both sides of the heat dissipation groove (212). The outer ends of the reset elastic plates (24) are fixedly connected to the inner surface of the outer housing (21), and the inner sides of the reset elastic plates (24) are in contact with the inner surface of the expansion push plate (23).

5. The high-air-permeability battery housing for a new energy vehicle according to claim 2, wherein: The inner housing unit includes an inner housing (25) fixedly installed in the middle of the upper surface of the substrate (11). Air inlet inner openings (251) are provided at the bottoms of both side walls of the inner housing (25), and the positions of the air inlet inner openings (251) are adapted to the positions of the air inlets (211).

6. The high-permeability battery housing for a new energy vehicle according to claim 5, wherein: A battery plate placement groove (26) is provided on the left inner wall of the inner housing (25). An insulating protection backing plate (27) is arranged outside the battery plate placement groove (26), and the insulating protection backing plate (27) is embedded in the left side wall of the inner housing (25).

7. The high-air-permeability battery housing for a new energy vehicle according to claim 6, characterized in that: A buffer partition (28) is fixedly installed in the middle of the inner housing (25). Air ventilation grooves (281) are provided on the side walls of the buffer partition (28), and a battery pack placement partition (282) is fixedly installed on the side wall surface of the buffer partition (28).

8. The high-air-permeability battery housing for a new energy vehicle according to claim 7, characterized in that: A bottom heat dissipation and air ventilation trough body (29) is provided at the bottom of the inner housing (25). The lower surface of the bottom heat dissipation and air ventilation trough body (29) is fixedly connected to the upper surface of the substrate (11), and the position of the bottom heat dissipation and air ventilation trough body (29) is adapted to the position of the battery pack placement partition (282).

9. The high-air-permeability battery housing for a new energy vehicle according to claim 2, wherein: The cover unit includes a cover (31) snap-fitted above the outer housing (21). A heat dissipation arc-shaped groove (311) is provided on the top of the cover (31), and an explosion-proof net (32) is fixedly installed at the bottom of the inner surface of the cover (31).

10. A highly breathable battery housing for a new energy vehicle according to claim 9, characterized in that: The temperature control and heat dissipation unit includes a heat dissipation exhaust fan (33) fixedly installed at the center of the top of the cover (31). A temperature sensor (34) is arranged on one side of the heat dissipation exhaust fan (33). The temperature sensor (34) is fixedly installed on the inner wall of the top of the cover (31). The output end of the temperature sensor (34) is electrically connected to the control input end of the heat dissipation exhaust fan (33).

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