Temperature-controllable adjustable lithium battery

Abstract

The invention discloses a temperature-controllable and adjustable lithium battery, which comprises a shell playing a protection role, the inner side of the shell is provided with a separation cavity and a liquid cavity, the left end of the shell is provided with a ventilation filter hole, and the upper end of the shell is provided with a wire connector; the driving assembly is installed on the inner side of the partition cavity, automatic conveying of the cooling liquid is achieved through the wind power effect, and temperature control adjustment is completed; the battery assembly is installed on the inner side of the shell, the battery assembly comprises a frame body mechanism and a battery main body arranged on the inner side of the frame body mechanism, the upper end and the lower end of the frame body mechanism are both provided with supporting mechanisms for improving the installation stability of the battery assembly, and the upper end and the lower end of the frame body mechanism are provided with fire extinguishing mechanisms for achieving fault power-off fire extinguishing. The temperature-controllable and adjustable lithium battery can achieve effective heat dissipation through wind power generated in the running process of a vehicle, can achieve automatic isolation fire extinguishing after a single battery breaks down and breaks out of fire, and is high in use safety.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, specifically to a temperature-controlled lithium battery. Background Technology

[0002] Compared with traditional batteries, lithium-ion batteries have advantages such as high energy density, light weight and good high and low temperature discharge performance, so they are widely used in new energy vehicles. However, existing lithium batteries still have some shortcomings in use.

[0003] In the prior art, such as the fixed-distance water circulation temperature control square battery restraint tray disclosed in CN114578102A, the principle of the tray is different from that of the ordinary fixed tray. By setting up components such as transmission screws and moving pressure plates, the degree of restraint of the battery in the tray can be controlled. At the same time, because the clamping blocks are uniformly fitted to the square battery specifications, it is not easy for the battery to deform during expansion. During the charging and discharging of the battery, the water circulation of the temperature control device is connected to perform regional water circulation temperature control of the battery. While controlling the battery temperature, it can also detect areas of abnormal temperature rise and troubleshoot faulty batteries. However, in use, it requires the use of external drive equipment to transport cooling water, which will generate a certain amount of heat during the operation of the equipment and accelerate the consumption of electricity, which has certain defects in use.

[0004] For example, a lithium battery pack with efficient heat dissipation, disclosed in CN115332603A, has a storage tank. The storage tank, top cover, and plastic bag together form a space for storing dry powder. The placement tank, cover, and plastic film together form another space for storing dry powder. The plastic bag and plastic film can be burned open under high temperature. When the lithium battery pack catches fire, the flames will burn through the plastic bag and plastic film, creating openings. At this time, the dry powder stored between the cover and placement tank and between the top cover and storage tank will fall down from the openings under the influence of gravity, thus using the dry powder to extinguish or slow down the fire of the lithium battery pack. However, during the fire extinguishing process, the individual battery cells in the battery pack are still connected by electrical circuits, making it easy for the fire of a single battery to spread rapidly, thereby increasing the damage, which has certain defects in use. Summary of the Invention

[0005] The purpose of this invention is to provide a temperature-controlled lithium battery to solve the problems mentioned in the background art, such as the need for external equipment for circulating fluid delivery and the inability to isolate and extinguish individual batteries.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a temperature-controlled lithium battery, comprising a protective housing, wherein a cavity and a liquid cavity are provided on the inner side of the housing, a ventilation filter is installed at the left end of the housing, and a connector is installed at the upper end of the housing;

[0007] It also includes: a drive assembly, installed inside the cavity, which uses airflow to automatically deliver coolant and control temperature.

[0008] The battery assembly is installed inside the housing. The battery assembly includes a frame mechanism and a battery body disposed inside the frame mechanism. The upper and lower ends of the frame mechanism are equipped with support mechanisms to improve the installation stability of the battery assembly. The upper and lower ends of the frame mechanism are equipped with fire extinguishing mechanisms to achieve power outage and fire extinguishing in case of failure.

[0009] Preferably, the drive assembly includes a rotating shaft rotatably mounted inside the cavity, and plate-shaped air plates are uniformly arranged on the outer side of the rotating shaft, with the air plates corresponding to the positions of the ventilation filter holes.

[0010] By adopting the above technical solution, the outside natural wind enters the ventilation filter and blows onto the air vane, causing the air vane to rotate automatically under the action of the wind.

[0011] Preferably, the end of the air plate away from the rotating shaft is integrally provided with a cylindrical structure, and the lower inner wall of the cavity is fixed with a liquid inlet pipe, and the liquid inlet pipe is connected between the liquid cavity and the frame mechanism. At the same time, the minimum distance from the end of the air plate to the bottom surface of the cavity is less than the outer diameter of the liquid inlet pipe.

[0012] By adopting the above technical solution, the air vane can intermittently squeeze the inlet pipe during rotation, pushing the coolant in the inlet pipe to move and realizing the circulation and transportation of coolant.

[0013] Preferably, the frame mechanism includes a lower seat, an upper seat, and a sleeve, with the lower seat and upper seat fixedly installed at both ends of the sleeve, and cavities are opened on the inner sides of the lower seat, upper seat, and sleeve. At the same time, an inlet pipe and an outlet pipe are connected between the lower seat and the liquid cavity.

[0014] By adopting the above technical solution, the coolant can enter the cavity inside the lower seat, upper seat and sleeve through the inlet pipe, and then enter the liquid cavity again through the drain pipe, thereby achieving effective coolant circulation and completing efficient heat dissipation.

[0015] Preferably, the support mechanism includes a support frame fixedly installed on the outside of the lower seat and the upper seat, and the upper end of the support frame is provided with an inclined elastic piece, which fits against the inner wall of the housing.

[0016] By adopting the above technical solution, the elastic sheet can provide elastic support for the battery components during use, thereby reducing vibration and improving safety.

[0017] Preferably, the inner side of the sleeve is provided with the battery body, and the outer side of the sleeve is rotatably sleeved with the outer cylinder, and both the sleeve and the outer cylinder are provided with corresponding through hole structures.

[0018] By adopting the above technical solution, the air entering the inner side of the casing can effectively exchange heat with the battery body through the through-hole structure on the sleeve and outer cylinder, thereby achieving effective temperature control of the battery body.

[0019] Preferably, a connector is fixedly installed on the outer side of the support frame, and a connecting block is fixedly provided at the end of the connector. The connecting block is attached to the electrode of the battery body to achieve circuit connection. At the same time, a memory metal limiting plate is fixedly provided on the outer side of the lower and upper seats, and the limiting plate limits the end of the connector. The connector is made of elastic material.

[0020] By adopting the above technical solution, when the battery body fails, heats up, and catches fire, it will heat the limiting plate, causing the limiting plate to bend due to heat, thereby releasing the limiting of the connecting plate and causing the connecting plate to elastically recover, thereby driving the connecting block to detach from the electrode of the battery body and realizing automatic power cut-off.

[0021] Preferably, a pull rope is fixedly connected to the outer side of the connecting piece, and the other end of the pull rope is wrapped around the outer side of the adjusting ring, and the two adjusting rings are fixedly installed at the upper and lower ends of the outer cylinder.

[0022] By adopting the above technical solution, when the connector pops up, it can pull the adjusting ring and the outer cylinder to rotate synchronously by pulling the rope, so that the through hole structure on the outer cylinder is misaligned with the through hole structure on the sleeve, thereby sealing each through hole structure.

[0023] Preferably, a connecting rod is rotatably connected to the inner side of the adjusting ring, and a sealing plate is rotatably connected to the end of the connecting rod away from the adjusting ring. The other end of the sealing plate is rotatably installed on the outer side of the lower seat and the upper seat. At the same time, five sealing plates are arranged at equal angles along the axis, and the five sealing plates are fitted and spliced ​​together to form a circular structure, thereby sealing the upper and lower ends of the sleeve.

[0024] By adopting the above technical solution, when the adjusting ring rotates, multiple sealing plates can be pulled to rotate synchronously by the connecting rod, so that the multiple sealing plates can be rotated and spliced ​​to seal the upper and lower ends of the sleeve.

[0025] Preferably, the fire extinguishing mechanism includes an air reservoir fixedly bonded between the support frame and the wiring piece, the inner side of the air reservoir is filled with carbon dioxide, and the outer side of the air reservoir is connected to an exhaust pipe. The exhaust pipe passes through the connecting block and faces the inner side of the sleeve, and the end of the exhaust pipe is a flexible valve structure.

[0026] By adopting the above technical solution, when the connecting piece undergoes elastic deformation and approaches the support frame, it will squeeze the air reservoir, causing the air pressure inside the air reservoir to increase. This will cause the elastic valve of the exhaust pipe to open and deliver carbon dioxide to the inside of the sleeve.

[0027] Compared with the prior art, the beneficial effects of the present invention are: the temperature-regulating lithium battery can effectively dissipate heat through the wind generated during vehicle movement, and can automatically isolate and extinguish fire after a single battery fails and catches fire, thus ensuring high safety. The specific details are as follows;

[0028] 1. Equipped with a fan blade and a liquid inlet pipe, when the vehicle is moving, the air enters the cavity through the ventilation filter, which blows the fan blade to rotate. When the fan blade rotates, its end will intermittently squeeze the liquid inlet pipe, so that the liquid inlet pipe can draw the coolant in the liquid cavity and deliver it to the cavity of the lower seat, upper seat and sleeve, thereby achieving efficient heat exchange. At the same time, the air will pass through the through holes on the sleeve and the outer cylinder to achieve effective temperature control.

[0029] 2. It is equipped with a connecting piece and a limiting piece. When the battery body fails and catches fire, it will heat the battery body, causing the battery body to deform and thus break away from the limiting piece of the connecting piece. This will cause the connecting piece to elastically reset, thereby moving the connecting block away from the electrode of the battery body and realizing automatic power cut-off of the faulty battery body.

[0030] 3. It is equipped with a connector, an air reservoir, an outer cylinder, and sealing plates. When the connector undergoes elastic deformation, it will pull the adjusting ring and the outer cylinder to rotate via a pull rope, thereby sealing the through hole structure on the socket. At the same time, the adjusting ring will pull multiple sealing plates to rotate and splice through a connecting rod, thereby sealing both ends of the socket. During the sealing process, the air reservoir will be pressurized and will transport gas to the inside of the socket through the exhaust pipe to expel air, thereby achieving automatic isolation and fire extinguishing of the faulty battery body. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a three-dimensional cross-sectional view of the present invention;

[0033] Figure 3 This is a three-dimensional structural diagram of the battery assembly of the present invention;

[0034] Figure 4This is a schematic cross-sectional view of the battery assembly of the present invention;

[0035] Figure 5 This is a schematic diagram of the outer cylinder mounting structure of the present invention;

[0036] Figure 6 This is a three-dimensional sectional view of the sleeve structure of the present invention;

[0037] Figure 7 This is a schematic diagram of the sealing sheet installation structure of the present invention;

[0038] Figure 8 This is a three-dimensional structural diagram of the support frame and connector plate of the present invention;

[0039] Figure 9 This is a three-dimensional sectional view of the frame mechanism of the present invention.

[0040] In the diagram: 1. Shell; 101. Chamber; 2. Ventilation filter; 3. Connector; 4. Shaft; 5. Air vane; 6. Liquid chamber; 7. Lower seat; 8. Upper seat; 9. Sleeve; 10. Liquid inlet pipe; 11. Liquid outlet pipe; 12. Battery body; 13. Support frame; 1301. Elastic sheet; 14. Connecting piece; 15. Connecting block; 16. Limiting piece; 17. Air reservoir; 18. Exhaust pipe; 19. Outer cylinder; 20. Adjusting ring; 21. Pull rope; 22. Connecting rod; 23. Sealing plate. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Please see Figures 1-9 The present invention provides a technical solution: a temperature-controlled lithium battery, including a housing 1 that serves as a protective shell, a partition cavity 101 and a liquid cavity 6 are provided on the inner side of the housing 1, a ventilation filter 2 is installed at the left end of the housing 1, and a connector 3 is installed at the upper end of the housing 1.

[0043] It also includes: a drive assembly, installed inside the cavity 101, which realizes the automatic delivery of coolant through wind power and completes temperature control; and a battery assembly, installed inside the housing 1, which includes a frame mechanism and a battery body 12 set inside the frame mechanism, and the upper and lower ends of the frame mechanism are both supported by a support mechanism to improve the installation stability of the battery assembly.

[0044] The drive assembly includes a rotating shaft 4 rotatably mounted inside the diaphragm 101, with plate-shaped air plates 5 evenly distributed on the outer side of the rotating shaft 4, and the air plates 5 are positioned corresponding to the ventilation filter holes 2. The end of the air plate 5 furthest from the rotating shaft 4 has an integrally formed cylindrical structure, and a liquid inlet pipe 10 is fixed to the lower inner wall of the diaphragm 101, connecting the liquid chamber 6 and the frame mechanism. The minimum distance from the end of the air plate 5 to the bottom surface of the diaphragm 101 is less than the outer diameter of the liquid inlet pipe 10. The frame mechanism includes a lower seat 7, an upper seat 8, and a sleeve 9, with the lower seat 7 and upper seat 8 fixedly mounted at both ends of the sleeve 9. Cavities are formed inside the lower seat 7, upper seat 8, and sleeve 9, and the lower seat 7 is connected to the liquid chamber 6 by the liquid inlet pipe 10 and the liquid outlet pipe 11. The inner side of the sleeve 9 is provided with the battery body 12, and the outer sleeve 19 is rotatably sleeved on the outer side of the sleeve 9. Both the sleeve 9 and the outer sleeve 19 are provided with corresponding through holes.

[0045] like Figures 1-6 and Figure 9 As shown, when the vehicle is in motion, the outside wind enters the cavity 101 through the ventilation filter 2, thereby blowing the air vane 5, causing the air vane 5 to drive the rotating shaft 4 to rotate. At this time, the outer end of the air vane 5 will intermittently squeeze the liquid inlet pipe 10, so that the liquid inlet pipe 10 automatically draws the coolant from the liquid chamber 6 and delivers it to the cavities in the lower seat 7, upper seat 8, and sleeve 9, thereby achieving heat exchange and cooling of the battery body 12. The coolant then flows back into the liquid chamber 6 through the drain pipe 11 for cooling. Meanwhile, the wind blows towards the battery assembly and exchanges heat with the battery body 12 through the through-hole structure on the sleeve 9 and the outer cylinder 19, thereby achieving effective temperature control and regulation of the battery body 12.

[0046] The support mechanism includes a support frame 13 fixedly installed on the outside of the lower seat 7 and the upper seat 8. An inclined elastic piece 1301 is provided at the upper end of the support frame 13, and the elastic piece 1301 abuts against the inner wall of the housing 1. A connector 14 is fixedly installed on the outside of the support frame 13, and a connecting block 15 is fixedly provided at the end of the connector 14. The connecting block 15 is attached to the electrode of the battery body 12 to achieve a circuit connection. Meanwhile, a shape memory metal limiting piece 16 is fixedly provided on the outside of the lower seat 7 and the upper seat 8, and the limiting piece 16 limits the end of the connector 14. The connector 14 is made of elastic material, such as… Figures 6-8 As shown, when a single battery body 12 catches fire due to a malfunction, the heat generated will heat the limiting plate 16, causing the limiting plate 16 to deform, thereby causing the connecting piece 14 to lose its limiting function. At this time, the connecting piece 14 will elastically reset, thereby causing the connecting block 15 to separate from the electrode of the battery body 12, realizing automatic power cut-off.

[0047] A pull rope 21 is fixedly connected to the outer side of the connecting piece 14, and the other end of the pull rope 21 is wrapped around the outer side of the adjusting ring 20. The two adjusting rings 20 are fixedly installed at the upper and lower ends of the outer cylinder 19. A connecting rod 22 is rotatably connected to the inner side of the adjusting ring 20, and a sealing plate 23 is rotatably connected to the end of the connecting rod 22 away from the adjusting ring 20. The other end of the sealing plate 23 is rotatably installed on the outer side of the lower seat 7 and the upper seat 8. Five sealing plates 23 are arranged axially at equal angles, and the five sealing plates 23 are fitted together to form a circular structure, thereby sealing the upper and lower ends of the sleeve 9. Fire extinguishing mechanisms are installed at the upper and lower ends of the frame structure to extinguish fires during power outages. These mechanisms include an air reservoir 17 fixedly bonded between the support frame 13 and the wiring piece 14. The inner side of the air reservoir 17 is filled with carbon dioxide, and an exhaust pipe 18 is connected to the outer side of the air reservoir 17. The exhaust pipe 18 passes through the connecting block 15 and faces the inner side of the sleeve 9. The end of the exhaust pipe 18 has a resilient valve structure. Figures 6-8 As shown, when the connecting piece 14 undergoes elastic deformation, it pulls the adjusting ring 20 and the outer cylinder 19 to rotate synchronously, allowing the outer cylinder 19 to seal the through hole structure on the sleeve 9. When the adjusting ring 20 rotates, it pulls multiple sealing pieces 23 to rotate synchronously and splice through the connecting rod 22, thereby sealing the upper and lower ends of the sleeve 9 and achieving automatic isolation of the faulty battery body 12. At the same time, when the connecting piece 14 resets, it cooperates with the support frame 13 to squeeze the air storage bag 17, causing the air pressure in the air storage bag 17 to increase. This causes the elastic valve at the end of the exhaust pipe 18 to open and blow carbon dioxide into the sleeve 9, thereby expelling the air inside the sleeve 9, achieving oxygen isolation, and further promoting fire extinguishing.

[0048] In summary, when using this temperature-controlled lithium battery, firstly, as... Figures 1-9 As shown, when a vehicle equipped with a lithium battery is in motion, air enters the housing 1 through the ventilation filter 2 to cool the battery components. At the same time, it drives the fan plate 5 to rotate, enabling automatic delivery of coolant and improving temperature control. When a single battery body 12 catches fire due to a malfunction, the terminal block 14 will automatically pop up to cut off the circuit. Simultaneously, the adjusting ring 20 will drive the outer cylinder 19 and the sealing plate 23 to rotate automatically, thereby sealing the sleeve 9. During the sealing process, the air bladder 17 will blow the carbon dioxide inside into the sleeve 9 to remove air, thus achieving an effective fire extinguishing effect and completing a series of tasks.

[0049] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A temperature-controlled lithium battery, comprising a protective housing (1), wherein a cavity (101) and a liquid cavity (6) are provided on the inner side of the housing (1), and a ventilation filter (2) is installed at the left end of the housing (1), and a connector (3) is installed at the upper end of the housing (1). Its features are, Also includes: The drive assembly is installed inside the cavity (101) and uses wind power to automatically deliver coolant and complete temperature control. The battery assembly is installed inside the housing (1). The battery assembly includes a frame mechanism and a battery body (12) disposed inside the frame mechanism. The upper and lower ends of the frame mechanism are both equipped with support mechanisms to improve the installation stability of the battery assembly. The upper and lower ends of the frame mechanism are equipped with fire extinguishing mechanisms to realize power outage and fire extinguishing in case of failure.

2. The temperature-controlled lithium battery according to claim 1, characterized in that: The drive assembly includes a rotating shaft (4) rotatably mounted inside the cavity (101), and a plate-shaped air plate (5) is uniformly arranged on the outer side of the rotating shaft (4), and the air plate (5) is arranged in a corresponding position to the ventilation filter hole (2).

3. The temperature-controlled lithium battery according to claim 2, characterized in that: The end of the air plate (5) away from the rotating shaft (4) is integrally provided with a cylindrical structure, and the lower inner wall of the cavity (101) is fixed with an inlet pipe (10), and the inlet pipe (10) is connected between the liquid cavity (6) and the frame mechanism. At the same time, the minimum distance from the end of the air plate (5) to the bottom surface of the cavity (101) is less than the outer diameter of the inlet pipe (10).

4. The temperature-controlled lithium battery according to claim 1, characterized in that: The frame structure includes a lower seat (7), an upper seat (8), and a sleeve (9). The lower seat (7) and the upper seat (8) are fixedly installed at both ends of the sleeve (9). The lower seat (7), the upper seat (8), and the sleeve (9) have cavities on their inner sides. At the same time, the lower seat (7) and the liquid cavity (6) are connected by an inlet pipe (10) and an outlet pipe (11).

5. A temperature-controlled lithium battery according to claim 4, characterized in that: The support mechanism includes a support frame (13) fixedly installed on the outside of the lower seat (7) and the upper seat (8), and the upper end of the support frame (13) is provided with an inclined elastic piece (1301), and the elastic piece (1301) fits against the inner wall of the housing (1).

6. A temperature-controlled lithium battery according to claim 4, characterized in that: The inner side of the sleeve (9) is provided with a battery body (12), and the outer side of the sleeve (9) is rotatably sleeved with an outer cylinder (19). Both the sleeve (9) and the outer cylinder (19) are provided with corresponding through holes.

7. A temperature-controlled lithium battery according to claim 5, characterized in that: A connector (14) is fixedly installed on the outside of the support frame (13), and a connecting block (15) is fixedly provided at the end of the connector (14). The connecting block (15) is attached to the electrode of the battery body (12) to realize circuit connection. Meanwhile, a memory metal limiting piece (16) is fixedly provided on the outside of the lower seat (7) and the upper seat (8). The limiting piece (16) limits the end of the connector (14). The connector (14) is made of elastic material.

8. A temperature-controlled lithium battery according to claim 7, characterized in that: A pull rope (21) is fixedly connected to the outside of the connecting piece (14), and the other end of the pull rope (21) is wrapped around the outside of the adjusting ring (20), and the two adjusting rings (20) are fixedly installed at the upper and lower ends of the outer cylinder (19).

9. A temperature-controlled lithium battery according to claim 8, characterized in that: The inner side of the adjusting ring (20) is rotatably connected to a connecting rod (22), and the end of the connecting rod (22) away from the adjusting ring (20) is rotatably connected to a sealing plate (23). The other end of the sealing plate (23) is rotatably installed on the outer side of the lower seat (7) and the upper seat (8). At the same time, five sealing plates (23) are arranged at equal angles along the axis, and the five sealing plates (23) are fitted and spliced ​​together to form a circular structure, thereby sealing the upper and lower ends of the sleeve (9).

10. A temperature-controlled lithium battery according to claim 9, characterized in that: The fire extinguishing mechanism includes an air reservoir (17) fixedly bonded between the support frame (13) and the wiring piece (14), and the inner side of the air reservoir (17) is filled with carbon dioxide, and the outer side of the air reservoir (17) is connected to an exhaust pipe (18). The exhaust pipe (18) passes through the connecting block (15) and faces the inner side of the sleeve (9), and the end of the exhaust pipe (18) is a flexible valve structure.

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