New energy lithium battery and preparation method thereof

Abstract

The application is suitable for the technical field of new energy lithium batteries, and provides a new energy lithium battery and a preparation method thereof.The new energy lithium battery comprises a battery box, a transverse partition plate and a longitudinal partition plate are arranged in the battery box, the transverse partition plate and the longitudinal partition plate are integrally formed with the inner wall of the battery box, the battery box is divided into multiple divided chambers, a series battery pack is assembled in each of the divided chambers, the series battery pack is formed by connecting multiple lithium battery modules in series, there is a gap between the multiple lithium battery modules, so that heat dissipation is facilitated, and the series battery packs in the multiple divided chambers are connected in parallel; wherein two battery interface conductive blocks are arranged on the lithium battery module. The new energy lithium battery and the preparation method thereof provided by the scheme are connected in series and parallel by using copper sheets to tightly connect the lithium battery modules, welding is avoided, maintenance and replacement of the single lithium battery module are facilitated, the gap between the lithium battery modules is matched with the air supply assembly and the cooling mechanism, and heat dissipation is facilitated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy lithium batteries, and particularly relates to a new energy lithium battery and a preparation method thereof. BACKGROUND

[0002] With the development of technology, new energy lithium batteries used by new energy vehicles are more and more. In the prior art, in order to reduce damage to the battery cell, the series-parallel connection between lithium battery modules is usually connected by laser welding through a copper sheet. However, it also has many problems. First, the welding process brings great trouble to the later maintenance and replacement of a certain lithium battery module. When a certain lithium battery module needs to be replaced due to failure, the welding connection method makes disassembly and reinstallation complex and time-consuming. Second, in the existing new energy battery, the lithium battery modules are closely arranged, and the heat dissipation performance is poor, which is not conducive to the heat dissipation of the lithium battery during the working process, and may affect the performance and service life of the lithium battery, thereby limiting the application of the lithium battery in the new energy field. SUMMARY

[0003] To solve the technical problems of lithium battery module replacement and maintenance trouble and poor heat dissipation effect, the application provides a new energy lithium battery and a preparation method thereof.

[0004] The application is implemented as follows: a new energy lithium battery, comprising: a battery box, a transverse partition plate and a longitudinal partition plate are arranged in the battery box, the transverse partition plate and the longitudinal partition plate are integrally formed with the inner wall of the battery box, and the battery box is divided into a plurality of divided chambers by the transverse partition plate and the longitudinal partition plate, a series battery group is arranged in each of the divided chambers, the series battery group is composed of a plurality of lithium battery modules connected in series, and gaps exist between the lithium battery modules to facilitate heat dissipation, and the series battery groups in the plurality of divided chambers are connected in parallel; wherein two battery interface conductive blocks are arranged on the lithium battery module, which are respectively the positive and negative interfaces of the lithium battery module, and a positioning groove is arranged on the battery interface conductive block; a box cover is mounted on the top opening of the battery box to protect the lithium battery module in the battery box.

[0005] Preferably, a plurality of placing grooves are formed in the inner wall of the bottom of the battery box, for placing the lithium battery module, and a rubber groove block is fixedly installed in the placing groove to protect the lithium battery module, and the lithium battery module is placed in the rubber groove block and is adapted to the rubber groove block.

[0006] Preferably, a plurality of threaded holes are arranged on the top of the battery box, and a plurality of mounting holes are formed in the box cover, the hole positions of the mounting holes and the hole positions of the threaded holes one-to-one correspond, and a screw is used to penetrate the mounting hole and be screwed with the threaded hole to fix the box cover on the top of the battery box.

[0007] Preferably, the cover is provided with multiple series components for connecting multiple lithium battery modules in the same partition chamber in series. The series components include series copper plates and two conductive rods. The series copper plates are fixedly installed at the bottom of the cover. The two conductive rods are both located at the bottom of the series copper plates and are integrally formed with the series copper plates. The two conductive rods are inserted into the two slots of two battery interface conductive blocks with opposite polarities on two adjacent lithium battery modules, and the series copper plates are in contact with the two battery interface conductive blocks.

[0008] Preferably, the cover is provided with a parallel assembly for connecting the series-connected battery packs in multiple compartments in parallel. The parallel assembly includes: two first positive parallel copper plates and two first negative parallel copper plates, each fixedly installed at the bottom of the cover; the bottom of each first positive and first negative parallel copper plate also has two conductive rods for inserting into the positioning slots of corresponding lithium battery modules in two adjacent compartments; four connecting copper rods fixedly installed on the top of the two first positive and two first negative parallel copper plates; all fixedly embedded in the cover. The top of the cover has a second positive parallel copper sheet and a second negative parallel copper sheet. The second positive parallel copper sheet is fixedly connected to two connecting copper rods on the top of the two first positive parallel copper sheets. The second negative parallel copper sheet is fixedly connected to two connecting copper rods on the top of the two first negative parallel copper sheets. A positive terminal and a negative terminal are fixedly installed on the top of the second positive parallel copper sheet. Locking screws are provided on the positive and negative terminals for fixing the connector of the external connecting wire to the positive and negative terminals with nuts.

[0009] Preferably, two insulating covers are fixedly installed on the top of the box cover to cover the second positive parallel copper sheet and the second negative parallel copper sheet.

[0010] Preferably, a rubber pad is fixedly installed at the bottom of the cover to press the top of the lithium battery module, so as to fix the lithium battery module stably.

[0011] Preferably, the top two sides of the battery box are provided with side wing plates integrally formed with the battery box, and the side wing plates are provided with multiple fixing holes. The bottom and sides of the battery box are provided with multiple support bridges, and the top of the support bridges are also provided with two fixing holes. Fixing bolts are passed through the fixing holes on the support bridges and the side wing plates to fix the battery box to the vehicle frame.

[0012] Preferably, one side of the lithium battery module is provided with multiple strip-shaped grooves and rubber baffles are fixedly embedded therein to block adjacent lithium battery modules, and multiple strip-shaped grooves and rubber baffles are also installed on the side wall of the partition chamber to block the lithium battery modules and improve the stability of the lithium battery modules in the battery box.

[0013] Preferably, a rectangular frame is fixedly installed on the top of the box cover. The rectangular frame is made of rubber and its top is flush with the top of the side wing plate.

[0014] Preferably, the front side of the battery box is provided with multiple air supply components for supplying air into the gaps between the lithium battery modules to accelerate heat dissipation. The air supply components include: an air duct housing fixedly installed on the front side of the battery box, wherein the air duct housing of the multiple air supply components is integrally formed; a sealing partition fixedly installed inside the air duct housing, wherein a rotating shaft is rotatably installed on the sealing partition; and drive fan blades and a blower fan respectively fixedly sleeved at both ends of the rotating shaft. The drive fan blades are used to rotate by wind force when the vehicle is moving, and the blower fan is used to force air into the battery box. The battery box has multiple ventilation holes on both sides and on the transverse partition to connect the battery box with the air duct housing.

[0015] Preferably, a cooling mechanism is installed on the rear side of the battery box to cool the hot air discharged from the battery box. The cooling mechanism includes: a liquid tank fixedly installed on the rear side of the battery box, with a vent hole on the side of the liquid tank that contacts the battery box and is connected to the inside of the battery box; a partition plate fixedly installed inside the liquid tank, dividing the liquid tank into a gas collecting chamber and a liquid storage chamber, with coolant injected into the liquid storage chamber; a hot air pipe connected to the gas collecting chamber and the liquid storage chamber respectively, for delivering hot air to the liquid storage chamber; a diffuser block fixedly installed at one end of the hot air pipe, the diffuser block having an inner cavity and being connected to the hot air pipe, and multiple diffuser holes on the top of the diffuser block for dispersing hot air into the coolant in the liquid storage chamber; and a flat cold air pipe fixedly installed on the top of the liquid tank and connected to the liquid storage chamber, the other end of the cold air pipe being connected to the air duct housing for delivering cooling air into the air duct housing.

[0016] Preferably, a heat dissipation fin is fixedly installed on one side of the liquid tank to dissipate the heat of the coolant to the external environment.

[0017] Preferably, the top of the plurality of air duct housings is hinged with side covers to cover the air outlet of the air duct housing, so that the drive fan is not blown by the wind. A connecting plate is fixedly installed between two adjacent side covers, and a hinge block is fixedly installed at the connection between the connecting plate and the two air duct housings. An electric push rod is hinged between two hinge blocks to open the side covers.

[0018] This invention also proposes a method for preparing a new energy lithium battery, the method being used to prepare the new energy lithium battery as described above, the method comprising the following steps:

[0019] S1. Install lithium battery modules: Successfully insert the lithium battery modules into the rubber slots in each placement slot in sequence;

[0020] S2. Install the cover to achieve series and parallel connection: Install the cover on the top of the battery box. At this time, the series copper sheet is just close to the top of the battery interface conductive block, and the conductive rod is inserted into the positioning groove. The first positive parallel copper sheet and the first negative parallel copper sheet are also close to the corresponding battery interface conductive block. The conductive rods at the bottom of the first positive parallel copper sheet and the first negative parallel copper sheet are also accurately inserted into the corresponding positioning groove. The series and parallel connection of each lithium battery module is completed. The positive terminal and the negative terminal can be connected to the connector of the load connection wire.

[0021] S3. Secure the battery box to the frame: Use fixing bolts to install the battery box onto the frame through the fixing holes in the support bridge and side wing plates, i.e., the fixing bolts are threaded onto the frame.

[0022] S4. Side cover closed: When starting a new energy vehicle in winter, the battery box is in a low temperature state, which can keep the side cover closed, that is, the drive fan blades are not affected by wind.

[0023] S5, Side Cover Opening State: After the vehicle has been driven for a period of time, the temperature inside the battery pack rises and heat dissipation is required. When the electric push rod is activated, the output rod extends and pushes open the side cover. The wind generated by the vehicle's movement drives the fan blades to rotate, which in turn drives the exhaust fan to rotate through the shaft. The exhaust fan draws cold air from the upper part of the reservoir through the cold air duct and sends it to the gaps in the lithium battery module to dissipate heat. Hot air is distributed into the coolant in the reservoir through the hot air duct and the vent on the diffuser block, thereby cooling the hot air and rising to the upper part of the reservoir to form a closed air circulation. As the coolant temperature rises, the heat dissipation fins will also heat up and dissipate heat to the external environment to prevent the coolant temperature from becoming too high.

[0024] Compared with related technologies, the new energy lithium battery and its preparation method provided by this invention have the following beneficial effects:

[0025] The new energy lithium battery of the present invention adopts a box cover structure, on which series components and parallel components are set. The series and parallel connection of lithium battery modules are realized by the insertion of conductive plug rods. This connection method avoids welding connection, making the operation simpler and faster when a lithium battery module needs to be maintained or replaced, without the need for complicated welding and disassembly processes.

[0026] The battery box is equipped with horizontal and vertical partitions to divide it into multiple compartments. There are gaps between the lithium battery modules in the series battery packs in each compartment, which is beneficial for heat dissipation.

[0027] An air supply component is installed at the front of the battery box. When the vehicle is in motion, the drive fan blades can rotate under the action of wind, driving the air supply fan to deliver air into the gaps between the lithium battery modules to accelerate heat dissipation. At the same time, a cooling mechanism is installed at the rear of the battery box, which can cool the hot air discharged from the battery box, forming a closed air circulation. The heat dissipation fins can dissipate the heat of the coolant to the external environment, thereby effectively controlling the operating temperature of the lithium battery and improving the performance and service life of the lithium battery. Attached Figure Description

[0028] Figure 1 A top-view cross-sectional structural diagram of a new energy lithium battery provided by the present invention;

[0029] Figure 2 for Figure 1 An enlarged structural diagram of part A shown in the figure;

[0030] Figure 3 for Figure 1 An enlarged structural diagram of part B shown in the figure;

[0031] Figure 4 This is a top view of the battery box and the horizontal partition, longitudinal partition, and side wing plate in this invention.

[0032] Figure 5 This is a top view of the assembly of the battery box with the horizontal partition, the vertical partition, the side wing plate, the strip groove block, and the rubber baffle in this invention.

[0033] Figure 6 This is a top view of the assembly of the battery box and the lithium battery module in this invention;

[0034] Figure 7 A front cross-sectional view of a new energy lithium battery provided by the present invention;

[0035] Figure 8 for Figure 7 An enlarged structural diagram of section C shown in the figure;

[0036] Figure 9 This is a front sectional view of the battery box in this invention.

[0037] Figure 10 This is a top view of the assembly of the box cover with the second positive electrode parallel copper sheet and the second negative electrode parallel copper sheet in this invention;

[0038] Figure 11 This is a top view of the assembly of the box cover and the insulating cover sheet in this invention;

[0039] Figure 12 A side view of a new energy lithium battery provided by the present invention;

[0040] Figure 13This is a schematic diagram of a first side cross-sectional view of a new energy lithium battery provided by the present invention;

[0041] Figure 14 This is a schematic diagram of the second side cross-sectional structure of a new energy lithium battery provided by the present invention;

[0042] Figure 15 for Figure 14 An enlarged structural diagram of part D shown in the figure;

[0043] Figure 16 This is a three-dimensional assembly diagram of the liquid tank and heat dissipation fins in this invention;

[0044] Figure 17 This is a top view of the rectangular frame structure in this invention;

[0045] Figure 18 This is a three-dimensional assembly diagram of the lithium battery module, the strip-shaped groove block, and the rubber baffle in this invention;

[0046] Figure 19 This is a three-dimensional structural diagram of the air duct shell in this invention.

[0047] Reference numerals: 1. Battery box; 2. Horizontal partition; 3. Vertical partition; 4. Dividing chamber; 5. Placement slot; 6. Lithium battery module; 7. Battery interface conductive block; 8. Positioning slot; 9. Box cover; 10. Series copper sheet; 11. Conductive insertion rod; 12. First positive parallel copper sheet; 13. First negative parallel copper sheet; 14. Connecting copper rod; 15. Second positive parallel copper sheet; 16. Second negative parallel copper sheet; 17. Positive terminal post; 18. Negative terminal post; 19. Locking screw; 20. Insulating cover; 21. Rubber pad; 22. Side wing plate; 23. Support bridge Frame; 24. Fixing bolt; 25. Fixing hole; 26. Strip-shaped groove block; 27. Rubber baffle; 28. Rectangular frame; 29. ​​Air duct housing; 30. Sealing partition; 31. Rotating shaft; 32. Drive fan blade; 33. Supply fan; 34. Liquid tank; 35. Divider plate; 36. Gas collection chamber; 37. Liquid storage chamber; 38. Hot air duct; 39. Air dissipation block; 40. Cold air duct; 41. Vent hole; 42. Heat dissipation fins; 43. Side cover; 44. Connecting plate; 45. Hinge block; 46. Electric push rod; 71. Rubber groove block; 101. Threaded hole; 901. Mounting hole. Detailed Implementation

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the terms "comprising" and "having," and any variations thereof, in the specification and the foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification and the foregoing drawings are used to distinguish different objects, not to describe a particular order.

[0049] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0050] This invention provides a new energy lithium battery and its preparation method, such as... Figures 1-19 As shown, the new energy lithium battery includes: a battery box 1, wherein a horizontal partition 2 and a vertical partition 3 are provided inside the battery box 1. The horizontal partition 2 and the vertical partition 3 are integrally formed with the inner wall of the battery box 1, dividing the battery box 1 into multiple compartments 4. Each compartment 4 is equipped with a series battery pack, which is composed of multiple lithium battery modules 6 connected in series, and there are gaps between the multiple lithium battery modules 6 to facilitate heat dissipation. The series battery packs in the multiple compartments 4 are connected in parallel. Among them, the lithium battery module 6 is provided with two battery interface conductive blocks 7, which are the positive and negative interfaces of the lithium battery module 6, respectively. The battery interface conductive blocks 7 are provided with positioning grooves 8. The top opening of the battery box 1 is equipped with a box cover 9, which is used to protect the lithium battery modules 6 inside the battery box 1.

[0051] In this embodiment, the battery box 1 has a transverse partition 2 and a longitudinal partition 3, which are integrally formed with the inner wall of the battery box 1, dividing the battery box 1 into multiple compartments 4. This structural design makes the battery layout reasonable, and the series-connected battery packs in the multiple compartments 4 can be connected in parallel, which is beneficial to improving the overall performance of the battery. Each compartment 4 is equipped with a series-connected battery pack consisting of multiple lithium battery modules 6, and there are gaps between the lithium battery modules 6. This design is conducive to heat dissipation, effectively preventing the battery from overheating and improving the battery's safety and lifespan. The lithium battery modules 6 are provided with two battery interface conductive blocks 7 with positioning grooves 8 as positive and negative interfaces, which facilitates the connection between battery modules and ensures the continuity of the circuit. The box cover 9 installed on the top of the battery box 1 can protect the lithium battery modules 6 inside the battery box 1, protecting the lithium battery modules 6 and preventing external factors from damaging the batteries.

[0052] In a further preferred embodiment of the present invention, a plurality of placement slots 5 are provided on the bottom inner wall of the battery box 1 for placing lithium battery modules 6. A rubber block 71 is fixedly installed in the placement slot 5 for protecting the lithium battery modules 6. The lithium battery modules 6 are placed in the rubber block 71 and are adapted to the rubber block 71.

[0053] In this embodiment, the bottom inner wall of the battery box 1 has multiple placement slots 5, and rubber blocks 71 are fixedly installed in the placement slots 5. The lithium battery module 6 is placed in the rubber blocks 71 and the two are compatible. This design provides a dedicated placement position for the lithium battery module 6 in the battery box 1. The placement slots 5 help to fix the position of the lithium battery module 6, while the rubber blocks 71 can protect the lithium battery module 6 from damage such as collisions or friction, further improving the safety and stability of the lithium battery and helping to extend the service life of the lithium battery.

[0054] In a further preferred embodiment of the present invention, the top of the battery box 1 is provided with a plurality of threaded holes 101, and the cover 9 is provided with a plurality of mounting holes 901. The positions of the mounting holes 901 correspond one-to-one with the positions of the threaded holes 101, so as to use screws to pass through the mounting holes 901 and thread them to the threaded holes 101 to fix the cover 9 to the top of the battery box 1.

[0055] In this embodiment, the top of the battery box 1 has multiple threaded holes 101, and the cover 9 has multiple mounting holes 901 corresponding to the positions of the threaded holes 101. The cover 9 is fixed to the top of the battery box 1 by screws passing through the mounting holes 901 and threadedly connecting to the threaded holes 101. This design ensures a stable connection between the cover 9 and the battery box 1, effectively protecting the lithium battery module 6 inside the battery box 1 and preventing external factors from interfering with the internal battery structure. Furthermore, this connection method is simple, reliable, and easy to install and remove.

[0056] In another embodiment of the present invention, the cover 9 is provided with a plurality of series components for connecting multiple lithium battery modules 6 in the same partition chamber 4 in series. The series components include a series copper sheet 10 and two conductive rods 11. The series copper sheet 10 is fixedly installed at the bottom of the cover 9. The two conductive rods 11 are both disposed at the bottom of the series copper sheet 10 and are integrally formed with the series copper sheet 10. The two conductive rods 11 are inserted into two slots of two battery interface conductive blocks 7 with opposite polarities on two adjacent lithium battery modules 6, and the series copper sheet 10 is in contact with the two battery interface conductive blocks 7.

[0057] In this embodiment, multiple series-connected components on the cover 9 are used for series connection between multiple lithium battery modules 6 within the same compartment 4. The series-connected copper strip 10 is fixed to the bottom of the cover 9, and two integrally formed conductive rods 11 are inserted into the slots of the battery interface conductive blocks 7 of two adjacent lithium battery modules 6 with opposite polarities, with the series-connected copper strip 10 in contact with the battery interface conductive blocks 7. This design makes the series connection of lithium battery modules 6 within the same compartment 4 more convenient and orderly. The connection is achieved through the series-connected components on the cover 9, which not only improves the integration of the internal circuitry of the battery but also avoids the need for welding in the series and parallel connections between lithium battery modules 6. This facilitates subsequent maintenance and replacement; the lithium battery modules 6 can be easily removed and replaced simply by removing the cover 9. Furthermore, it ensures the effectiveness and stability of the battery pack series connection, thereby improving the overall performance of the lithium battery.

[0058] In another embodiment of the present invention, a parallel assembly is provided on the cover 9 to enable parallel conduction of series battery packs in multiple compartments 4. The parallel assembly includes: two first positive parallel copper plates 12 and two first negative parallel copper plates 13, both fixedly installed at the bottom of the cover 9. Two conductive rods 11 are also provided at the bottom of the first positive parallel copper plates 12 and the first negative parallel copper plates 13 for insertion into the positioning slots 8 of the corresponding two lithium battery modules 6 in two adjacent compartments; four connecting copper rods 14 are fixedly installed on the top of the two first positive parallel copper plates 12 and the two first negative parallel copper plates 13; and all are fixedly embedded in the top of the cover 9. The system includes a second positive parallel copper sheet 15 and a second negative parallel copper sheet 16. The second positive parallel copper sheet 15 is fixedly connected to two connecting copper rods 14 at the top of the two first positive parallel copper sheets 12, and the second negative parallel copper sheet 16 is fixedly connected to two connecting copper rods 14 at the top of the two first negative parallel copper sheets 13. A positive terminal post 17 is fixedly installed on the top of the second positive parallel copper sheet 15, and a negative terminal post 18 is fixedly installed on the top of the second negative parallel copper sheet 16. Locking screws 19 are provided on the positive terminal post 17 and the negative terminal post 18 for fixing the connector of the external connecting wire to the positive terminal post 17 and the negative terminal post 18 with a nut.

[0059] In this embodiment, the parallel assembly on the cover 9 is used for parallel conduction of the series-connected battery packs in multiple compartments 4. The conductive rods 11 at the bottom of the two first positive parallel copper plates 12 and the two first negative parallel copper plates 13 are inserted into the positioning slots 8 of the corresponding lithium battery modules 6 in two adjacent compartments. Four connecting copper rods 14 connect the first positive parallel copper plates 12 and 13 to the second positive parallel copper plates 15 and 16, respectively. Positive terminal posts 17 and 18 are located on top of the second positive parallel copper plates 15 and 16, respectively, and are equipped with locking screws 19 for securing the external load connection wire connectors. This structural design enables the series-connected battery packs in multiple compartments 4 to achieve stable parallel conduction. The connections between components are tight and orderly, facilitating connection to external equipment. Furthermore, the connection method is robust and reliable, contributing to improved practicality and functionality of the entire new energy lithium battery. Furthermore, it avoids the need for welding to connect the lithium battery modules 6 in parallel, which facilitates subsequent maintenance and replacement.

[0060] In another embodiment of the present invention, two insulating cover plates 20 are fixedly installed on the top of the box cover 9 to cover the second positive parallel copper plate 15 and the second negative parallel copper plate 16.

[0061] In this embodiment, two insulating covers 20 are fixedly installed on the top of the cover 9 to cover the second positive parallel copper sheet 15 and the second negative parallel copper sheet 16. This design can effectively prevent short circuits between the second positive parallel copper sheet 15 and the second negative parallel copper sheet 16 due to accidental contact or other reasons during use, thus improving the safety of battery use. At the same time, the presence of the insulating covers 20 can also protect the second positive parallel copper sheet 15 and the second negative parallel copper sheet 16 from the influence of the external environment, extending their service life.

[0062] In a further preferred embodiment of the present invention, a rubber pad 21 is fixedly installed at the bottom of the cover 9 to press the top of the lithium battery module 6 so as to fix the lithium battery module 6 stably.

[0063] In this embodiment, a rubber pad 21 is fixedly installed at the bottom of the cover 9 to press the top of the lithium battery module 6. This design makes the lithium battery module 6 more stable inside the battery box 1. The rubber pad 21 can provide downward pressure when the cover 9 is closed, preventing the lithium battery module 6 from shaking or shifting inside the battery box 1. This reduces problems such as loosening of internal wiring or unstable connection between battery modules that may be caused by shaking, thereby ensuring the normal operation and safety of the lithium battery.

[0064] In a further preferred embodiment of the present invention, the top two sides of the battery box 1 are provided with side wing plates 22 integrally formed with the battery box 1, and the side wing plates 22 are provided with a plurality of fixing holes 25. The bottom and sides of the battery box 1 are provided with a plurality of support bridges 23, and the top of the support bridges 23 are also provided with two fixing holes 25. Fixing bolts 24 pass through the fixing holes on the support bridges 23 and the side wing plates 22 to fix the battery box 1 to the vehicle frame.

[0065] In this embodiment, the battery box 1 has integrally formed side wing plates 22 on both sides of the top and bottom, and support bridges 23 on both sides. The side wing plates 22 have multiple fixing holes 25, and the support bridges 23 have two fixing holes 25 on the top. The battery box 1 is fixed to the vehicle frame by fixing bolts 24 passing through the fixing holes. This design allows the battery box 1 to be stably installed on the vehicle frame. The integrally formed side wing plates 22 and support bridges 23 have a stable structure. The cooperation of multiple fixing holes 25 and fixing bolts 24 ensures the firmness of the connection, reduces the possibility of the battery box 1 shaking or displacement during vehicle operation, and ensures the safety of the battery box 1 and the normal operation of its internal components such as the lithium battery module 6.

[0066] In a further preferred embodiment of the present invention, a plurality of strip-shaped grooves 26 are provided on one side of the lithium battery module 6, and rubber baffles 27 are fixedly embedded thereon to block adjacent lithium battery modules 6. A plurality of strip-shaped grooves 26 and rubber baffles 27 are also installed on the side wall of the partition chamber 4 to block the lithium battery module 6 and improve the stability of the lithium battery module 6 in the battery box 1.

[0067] In this embodiment, rubber baffles 27 are fixedly embedded in multiple strip-shaped slots 26 on one side of the lithium battery module 6, and multiple strip-shaped slots 26 and rubber baffles 27 on the side wall of the partition chamber 4 are used to block adjacent lithium battery modules 6. This design improves the stability of the lithium battery modules 6 within the battery box 1 by blocking the lithium battery modules 6 through the rubber baffles 27, preventing collisions or shaking between the lithium battery modules 6, thereby protecting the lithium battery modules 6 and their internal structure, ensuring that the lithium battery modules 6 within the entire battery box 1 are in a stable state, and helping to improve the overall performance and safety of the battery.

[0068] In a further preferred embodiment of the present invention, a rectangular frame 28 is fixedly installed on the top of the box cover 9. The rectangular frame 28 is made of rubber and its top is flush with the top of the side wing plate 22.

[0069] In this embodiment, a rectangular frame 28 made of rubber is fixedly installed on the top of the cover 9, and its top is flush with the top of the side wing plate 22. The rectangular frame 28 can provide a certain degree of protection for the cover 9 and its top components (such as the power connection post). Because it is made of rubber, it has a certain degree of elasticity and can buffer the impact that may be caused to the cover 9 by the outside world. Furthermore, the design of being flush with the top of the side wing plate 22 makes the overall structure look more regular, thereby improving the structural integrity and aesthetics of the battery box 1.

[0070] In a further preferred embodiment of the present invention, a plurality of air supply components are provided on the front side of the battery box 1 for supplying air into the gap between the lithium battery modules 6 to accelerate heat dissipation. The air supply components include: a duct housing 29 fixedly installed on the front side of the battery box 1, wherein the duct housing 29 is integrally formed; a sealing partition 30 fixedly installed inside the duct housing 29, wherein a rotating shaft 31 is rotatably installed on the sealing partition 30; and drive fan blades 32 and air supply fan 33 respectively fixedly sleeved at both ends of the rotating shaft 31. The drive fan blades 32 are used to rotate by wind force when the vehicle is moving, and the air supply fan 33 is used to forcibly supply air into the battery box 1. The battery box 1 has a plurality of ventilation holes 41 on both sides and on the transverse partition 2 to connect the battery box 1 with the interior of the duct housing 29.

[0071] In this embodiment, multiple air supply components are arranged on the front side of the battery box 1. The air duct housings 29 are fixedly installed on the front side of the battery box 1, and the multiple air duct housings 29 are integrally formed. Inside, there is a sealing partition 30 and a rotating shaft 31 rotatably mounted on the sealing partition 30. Drive fan blades 32 and air supply fans 33 are respectively fixedly sleeved at both ends of the rotating shaft 31. Multiple ventilation holes 41 are opened on both sides of the battery box 1 and on the transverse partition 2 to connect the battery box 1 with the interior of the air duct housings 29. When the vehicle is in motion, the drive fan blades 32 are rotated by the wind force, driving the air supply fans 33 to forcefully deliver air into the battery box 1 and into the gaps between the lithium battery modules 6 to accelerate heat dissipation. This design utilizes the wind resources during vehicle operation to dissipate heat from the lithium battery modules 6 through the air supply components. The ventilation holes 41 ensure airflow paths, and the integrally formed air duct housings 29 and sealing partitions 30 ensure the stability and sealing of the air supply components, effectively preventing the lithium battery modules 6 from experiencing performance degradation or safety hazards due to overheating.

[0072] In a further preferred embodiment of the present invention, a cooling mechanism is assembled on the rear side of the battery box 1 for cooling the hot air discharged from the battery box 1. The cooling mechanism includes: a liquid tank 34 fixedly installed on the rear side of the battery box 1, the side of the liquid tank 34 in contact with the battery box 1 also having a vent 41 and communicating with the inside of the battery box 1; a partition plate 35 fixedly installed inside the liquid tank 34, dividing the liquid tank 34 into a gas collecting chamber 36 and a liquid storage chamber 37, the liquid storage chamber 37 being filled with coolant; and a partition plate 35 connected to the gas collecting chamber 36 and the liquid storage chamber 37 respectively. The hot air duct 38 of the storage chamber 37 is used to deliver hot air into the storage chamber 37. A diffuser block 39 is fixedly installed at one end of the hot air duct 38. The diffuser block 39 has an inner cavity and is connected to the hot air duct 38. The top of the diffuser block 39 is provided with multiple diffuser holes to disperse the hot air into the coolant in the storage chamber 37. A flat cold air duct 40 is fixedly installed on the top of the liquid tank 34 and is connected to the storage chamber 37. The other end of the cold air duct 40 is connected to the air duct housing 29 to deliver cooling air into the air duct housing 29.

[0073] In this embodiment, a cooling mechanism is mounted on the rear side of the battery box 1. A liquid tank 34 is fixedly installed on the rear side of the battery box 1 and has a vent 41 connected to the side in contact with the battery box 1. A partition plate 35 inside the liquid tank 34 divides it into a gas collecting chamber 36 and a liquid storage chamber 37. The liquid storage chamber 37 contains coolant. A hot air duct 38 connects the gas collecting chamber 36 and the liquid storage chamber 37. A diffuser block 39 is fixedly installed at one end of the hot air duct 38, with a diffuser hole at the top to disperse hot air into the coolant. A flat cold air duct 40 is fixedly installed on the top of the liquid tank 34 and connects to the liquid storage chamber 37 and the air duct housing 29. Hot air discharged from the battery box 1 enters the gas collecting chamber 36 through the vent 41, and is dispersed into the coolant in the liquid storage chamber 37 by the hot air duct 38 and the diffuser block 39 for cooling. The cooled air is then sent back into the air duct housing 29 through the flat cold air duct 40, forming a circulation. This design effectively utilizes coolant to cool hot air, improving the heat dissipation efficiency of the battery box 1, ensuring the operating temperature of the lithium battery module 6, and helping to improve battery performance and extend its service life.

[0074] In a further preferred embodiment of the present invention, a heat dissipation fin 42 is fixedly installed on one side of the liquid tank 34 to dissipate the heat of the coolant to the external environment.

[0075] In this embodiment, the heat dissipation fins 42 fixedly installed on one side of the liquid tank 34 can dissipate the heat of the coolant to the external environment. In the entire cooling system, the heat dissipation fins 42 help improve the heat dissipation efficiency of the coolant, so that the coolant can continuously and effectively cool the hot air discharged from the battery box 1, ensuring the stable operation of the cooling mechanism, thereby maintaining a suitable temperature environment inside the battery box 1, ensuring the normal operation of the lithium battery module 6 and extending its service life.

[0076] In another embodiment of the present invention, the top of the plurality of air duct housings 29 is hinged with a side cover 43 for covering the air outlet of the air duct housing 29 so that the driving fan is not blown by the wind. A connecting plate 44 is fixedly installed between two adjacent side covers 43. A hinge block 45 is fixedly installed at the connection between the connecting plate 44 and the two air duct housings 29. An electric push rod 46 is hinged between two hinge blocks 45 for opening the side cover 43.

[0077] In this embodiment, the side cover 43, which is hinged at the top of the duct housing 29, covers the air outlet of the duct housing 29, preventing the drive fan from being blown by wind. The connecting plate 44 between adjacent side covers 43, the hinge block 45 fixedly installed at the connection between the connecting plate 44 and the two duct housings 29, and the electric push rod 46 hinged between the two hinge blocks 45 are used to open the side cover 43. The side cover 43 can prevent the drive fan from being blown by unnecessary wind when needed, ensuring that the equipment operates as required. The electric push rod 46 can open the side cover 43 as needed, so that the operating status of the entire system can be flexibly adjusted according to actual needs, improving the controllability and adaptability of the entire device operation.

[0078] This invention also proposes a method for preparing a new energy lithium battery, the method being used to prepare the new energy lithium battery as described above, the method comprising the following steps:

[0079] S1. Install lithium battery module 6: Sequentially and correctly insert the lithium battery module 6 into the rubber slots 71 in each placement slot 5 (e.g., ...). Figure 6 (as shown)

[0080] S2. Install the cover 9 to achieve series and parallel connection: Install the cover 9 on the top of the battery box 1. At this time, the series copper sheet 10 is just close to the top of the battery interface conductive block 7, and the conductive rod 11 is inserted into the positioning groove 8. The first positive parallel copper sheet 12 and the first negative parallel copper sheet 13 are also close to the corresponding battery interface conductive block 7. The conductive rods 11 at the bottom of the first positive parallel copper sheet 12 and the first negative parallel copper sheet 13 are also accurately inserted into the corresponding positioning groove 8 (e.g., Figure 1 As shown), each of the 6 lithium battery modules is connected in series and parallel. The positive terminal 17 and the negative terminal 18 can be connected to the connectors of the load connection wires.

[0081] S3. Fix the battery box 1 to the frame: Use fixing bolts 24 to pass through the fixing holes 25 on the support bridge 23 and the side wing plate 22 to install the battery box 1 on the frame, that is, the fixing bolts 24 are threadedly connected to the frame.

[0082] S4, Side cover 43 closed: When the new energy vehicle is first started in winter, the battery box 1 is in a low temperature state, which can keep the side cover 43 closed, that is, the drive fan blade 32 is not affected by wind.

[0083] S5, Side Cover 43 Open State: After the vehicle has been driven for a period of time, the temperature inside the battery box 1 rises and heat dissipation is required. When the electric push rod 46 is activated, the output rod is extended and the side cover 43 is opened. The wind generated by the vehicle driving drives the fan blade 32 to rotate, which in turn drives the blower fan 33 to rotate through the shaft 31. The blower fan 33 draws cold air from the upper part of the liquid storage chamber 37 through the cold air pipe 40 and sends it to the gap of the lithium battery module 6 to dissipate heat. The hot air is distributed into the coolant in the liquid storage chamber 37 through the hot air pipe 38 and the vent on the vent block 39, thereby cooling the hot air and rising to the upper part of the liquid storage chamber 37 to form a closed air circulation. As the coolant temperature rises, the heat dissipation fins 42 will also heat up and dissipate heat to the external environment to prevent the coolant temperature from becoming too high.

[0084] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0085] This solution also includes a patch-type temperature sensor and a controller. The patch-type temperature sensor is installed inside the battery box 1. When in use, the electric push rod 46 can be started by the controller. The power connection method of each electrical device is a mature existing technology and is well known to those skilled in the art. It will not be described in detail here.

[0086] In summary, compared with related technologies, the connection method between lithium battery modules 6 in this invention adopts a close-fitting plug-in series-parallel connection, avoiding welding and facilitating the maintenance and replacement of individual lithium battery modules;

[0087] In terms of the structure of the battery box 1, the horizontal partition 2 and the vertical partition 3 divide the space into multiple compartments 4, and the gaps between the lithium battery modules 6 in the compartments help with heat dissipation.

[0088] In the heat dissipation system, the air supply component uses the wind force of the vehicle to deliver air for heat dissipation, the cooling mechanism cools the exhaust air to form a circulation, and the heat dissipation fins 42 dissipate heat outward. Overall, it can effectively control the operating temperature of the lithium battery, thereby improving its performance and extending its service life.

[0089] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A new energy lithium battery, characterized in that, include: A battery box (1) is provided with a horizontal partition (2) and a vertical partition (3). The horizontal partition (2) and the vertical partition (3) are integrally formed with the inner wall of the battery box (1) to divide the battery box (1) into multiple compartments (4). Each compartment (4) is equipped with a series battery pack. The series battery pack is composed of multiple lithium battery modules (6) connected in series, and there are gaps between the multiple lithium battery modules (6) to facilitate heat dissipation. The series battery packs in the multiple compartments (4) are connected in parallel. The lithium battery module (6) is provided with two battery interface conductive blocks (7), which are the positive and negative interfaces of the lithium battery module (6) respectively, and the battery interface conductive blocks (7) are provided with positioning grooves (8). The top opening of the battery box (1) is equipped with a box cover (9) for protecting the lithium battery module (6) inside the battery box (1); the box cover (9) is provided with multiple series components for connecting multiple lithium battery modules (6) in the same partition chamber (4) in series. The series components include a series copper sheet (10) and two conductive rods (11). The series copper sheet (10) is fixedly installed at the bottom of the box cover (9). The two conductive rods (11) are both located at the bottom of the series copper sheet (10) and are integrally formed with the series copper sheet (10). The two conductive rods (11) are inserted into the two slots of two battery interface conductive blocks (7) with opposite polarities on two adjacent lithium battery modules (6), and the series copper sheet (10) is in contact with the two battery interface conductive blocks (7). The cover (9) is provided with a parallel assembly for connecting the series battery packs in multiple compartments (4) in parallel. The parallel assembly includes: two first positive parallel copper plates (12) and two first negative parallel copper plates (13) fixedly installed at the bottom of the cover (9). The bottom of the first positive parallel copper plates (12) and the first negative parallel copper plates (13) is also provided with two conductive rods (11) for insertion into the positioning slots (8) of the corresponding two lithium battery modules (6) in two adjacent compartments; four connecting copper rods (14) fixedly installed on the top of the two first positive parallel copper plates (12) and the two first negative parallel copper plates (13); and two second positive parallel copper plates fixedly embedded on the top of the cover (9). A copper plate (15) and a second negative copper plate (16) are connected in parallel. The second positive copper plate (15) is fixedly connected to two connecting copper rods (14) at the top of the two first positive copper plates (12). The second negative copper plate (16) is fixedly connected to two connecting copper rods (14) at the top of the two first negative copper plates (13). A positive terminal post (17) is fixedly installed on the top of the second positive copper plate (15) and a negative terminal post (18) is fixedly installed on the top of the second negative copper plate (16). Locking screws (19) are provided on the positive terminal post (17) and the negative terminal post (18) for fixing the connector of the external connecting wire to the positive terminal post (17) and the negative terminal post (18) with a nut. Two insulating cover plates (20) are fixedly installed on the top of the box cover (9) to cover the second positive parallel copper plate (15) and the second negative parallel copper plate (16). The front side of the battery box (1) is provided with multiple air supply components for supplying air into the gap between the lithium battery modules (6) to accelerate heat dissipation. The air supply components include: a duct housing (29) fixedly installed on the front side of the battery box (1), and the duct housing (29) of the multiple air supply components is integrally formed; a sealing partition (30) fixedly installed inside the duct housing (29), and a rotating shaft (31) is rotatably installed on the sealing partition (30); a drive fan blade (32) and a blower fan (33) respectively fixedly sleeved at both ends of the rotating shaft (31), the drive fan blade (32) is used to rotate by wind force when the vehicle is moving, and the blower fan (33) is used to force air into the battery box (1); wherein, multiple ventilation holes (41) are provided on both sides of the battery box (1) and on the transverse partition (2) to connect the battery box (1) with the inside of the duct housing (29); The top of each of the multiple air duct housings (29) is hinged with a side cover (43) to cover the air outlet of the air duct housing (29) so that the drive fan is not blown by the wind. A connecting plate (44) is fixedly installed between two adjacent side covers (43). A hinge block (45) is fixedly installed at the connection between the connecting plate (44) and the two air duct housings (29). An electric push rod (46) is hinged between the two hinge blocks (45) to open the side cover (43). A cooling mechanism is installed on the rear side of the battery box (1) to cool the hot air discharged from the battery box (1). The cooling mechanism includes: a liquid tank (34) fixedly installed on the rear side of the battery box (1), and a vent (41) is also provided on the side of the liquid tank (34) that contacts the battery box (1) and is connected to the inside of the battery box (1); a partition plate (35) fixedly installed inside the liquid tank (34) to divide the liquid tank (34) into a gas collecting chamber (36) and a liquid storage chamber (37), and the liquid storage chamber (37) is filled with coolant; and a cooling mechanism that is connected to the gas collecting chamber (36) and the liquid storage chamber (37) respectively. 37) Hot air duct (38) is used to send hot air into the liquid storage chamber (37). A diffuser block (39) is fixedly installed at one end of the hot air duct (38). The diffuser block (39) has an inner cavity and is connected to the hot air duct (38). The top of the diffuser block (39) is provided with multiple diffuser holes for dispersing hot air into the coolant in the liquid storage chamber (37). A flat cold air duct (40) is fixedly installed on the top of the liquid tank (34) and is connected to the liquid storage chamber (37). The other end of the cold air duct (40) is connected to the air duct housing (29) for sending cooling air into the air duct housing (29). A heat dissipation fin (42) is fixedly installed on one side of the liquid tank (34) to dissipate the heat of the coolant to the external environment.

2. The new energy lithium battery as described in claim 1, characterized in that, The bottom inner wall of the battery box (1) is provided with multiple placement slots (5) for placing lithium battery modules (6). A rubber block (71) is fixedly installed in the placement slot (5) for protecting the lithium battery module (6). The lithium battery module (6) is placed in the rubber block (71) and is adapted to the rubber block (71).

3. The new energy lithium battery as described in claim 1, characterized in that, The top of the battery box (1) is provided with multiple threaded holes (101), and the cover (9) is provided with multiple mounting holes (901). The positions of the mounting holes (901) correspond one-to-one with the positions of the threaded holes (101), so as to use screws to pass through the mounting holes (901) and connect with the threaded holes (101) to fix the cover (9) on the top of the battery box (1).

4. The new energy lithium battery as described in claim 1, characterized in that, The battery box (1) has side wing plates (22) integrally formed with the battery box (1) on both sides of the top. The side wing plates (22) have multiple fixing holes (25). The battery box (1) has multiple support bridges (23) at the bottom and on both sides. The support bridges (23) also have two fixing holes (25) at the top. Fixing bolts (24) pass through the fixing holes on the support bridges (23) and the side wing plates (22) to fix the battery box (1) to the vehicle frame.

5. The new energy lithium battery as described in claim 1, characterized in that, The lithium battery module (6) has multiple strip-shaped grooves (26) on one side and rubber baffles (27) fixedly embedded thereon to block adjacent lithium battery modules (6). The partition chamber (4) also has multiple strip-shaped grooves (26) and rubber baffles (27) installed on its side wall to block the lithium battery module (6) and improve the stability of the lithium battery module (6) in the battery box (1).

6. The new energy lithium battery as described in claim 1, characterized in that, A rectangular frame (28) is fixedly installed on the top of the box cover (9). The rectangular frame (28) is made of rubber and its top is flush with the top of the side wing plate (22).

7. A method for preparing a new energy lithium battery, characterized in that, The method is used to prepare a new energy lithium battery as described in any one of claims 1-6 above, and the method includes the following steps: S1. Install lithium battery modules (6): Install the lithium battery modules (6) in the rubber slots (71) in each slot (5) in sequence; S2. Install the cover (9) to achieve series and parallel connection: Install the cover (9) on the top of the battery box (1). At this time, the series copper sheet (10) is just close to the top of the battery interface conductive block (7), and the conductive rod (11) is inserted into the positioning groove (8). The first positive parallel copper sheet (12) and the first negative parallel copper sheet (13) are also close to the corresponding battery interface conductive block (7). The conductive rod (11) at the bottom of the first positive parallel copper sheet (12) and the first negative parallel copper sheet (13) is also accurately inserted into the corresponding positioning groove (8). The series and parallel connection of each lithium battery module (6) is completed. The positive terminal post (17) and the negative terminal post (18) can be connected to the connector of the load connection wire. S3. Fix the battery box (1) on the frame: Use fixing bolts (24) to pass through the fixing holes (25) on the support bridge (23) and the side wing plate (22) to install the battery box (1) on the frame, that is, the fixing bolts (24) are threaded to the frame; S4, Closed side cover (43) state: When the new energy vehicle is started in winter, the battery box (1) is in a low temperature state, which can keep the side cover (43) closed, that is, the drive fan blade (32) is not affected by wind. S5, Side cover open (43) state: After the vehicle has been driven for a period of time, the temperature inside the battery box (1) rises and heat dissipation is required. Then, by starting the electric push rod (46), the output rod is extended and the side cover (43) is opened. The wind generated by the vehicle driving drives the fan blade (32) to rotate, and then drives the blower fan (33) to rotate through the shaft (31). The blower fan (33) draws the cold air from the upper part of the liquid storage chamber (37) through the cold air pipe (40) and sends it to the gap of the lithium battery module (6) to dissipate heat. The hot air is distributed to the coolant in the liquid storage chamber (37) through the hot air pipe (38) and the air vent on the air vent block (39), thereby cooling the hot air and rising to the upper part of the liquid storage chamber (37) to form a closed air circulation. As the coolant temperature rises, the heat dissipation fins (42) will heat up and dissipate heat to the external environment to avoid the coolant temperature from being too high.

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