Efficient new energy lithium battery and preparation method thereof

Abstract

The invention is suitable for the technical field of new energy lithium batteries, and provides an efficient new energy lithium battery and a preparation method thereof.The efficient new energy lithium battery comprises a battery box, transverse partition plates and longitudinal partition plates are arranged in the battery box, the transverse partition plates, the longitudinal partition plates and the inner wall of the battery box are integrally formed, and the interior of the battery box is divided into a plurality of divided chambers; a series battery pack is assembled in each partition chamber, each series battery pack is formed by connecting a plurality of lithium battery modules in series, gaps exist among the lithium battery modules so as to facilitate heat dissipation, and the series battery packs in the partition chambers are connected in parallel and conducted; wherein the lithium battery module is provided with two battery interface conductive blocks. According to the efficient new energy lithium battery and the preparation method thereof provided by the scheme, the lithium battery modules are tightly attached through copper sheets, namely plug-in type series-parallel connection, so that welding is avoided, the maintenance and replacement of the single lithium battery module are facilitated, and the clearance fit between the lithium battery modules and the air supply assembly and the cooling mechanism are beneficial to heat dissipation.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy lithium batteries, and in particular relates to a high-efficiency new energy lithium battery and a preparation method thereof. Background Art

[0002] With the development of technology, new energy lithium batteries used in new energy vehicles are becoming more and more efficient. In the prior art, in order to reduce the damage to the battery cells, the series and parallel connections between lithium battery modules are usually connected by laser welding using copper sheets. 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 lithium battery module fails and needs to be replaced, the welding connection method makes disassembly and reinstallation complicated and time-consuming. Secondly, in the existing new energy batteries, the lithium battery modules are closely arranged, and their heat dissipation performance is poor, which is not conducive to the heat dissipation of the lithium battery during operation, and may affect the performance and service life of the lithium battery, thereby limiting the application of lithium batteries in the field of high-efficiency new energy. Summary of the invention

[0003] In order to solve the technical problems of troublesome replacement and maintenance of lithium battery modules and poor heat dissipation effect, the present invention provides a high-efficiency new energy lithium battery and a preparation method thereof.

[0004] The present invention is implemented as follows: a high-efficiency new energy lithium battery comprises: a battery box, wherein a transverse partition and a longitudinal partition are arranged in the battery box, wherein the transverse partition and the longitudinal partition are integrally formed with the inner wall of the battery box, and the battery box is divided into a plurality of compartments, wherein each compartment is equipped with a series battery pack, wherein the series battery pack is formed by a plurality of lithium battery modules connected in series, and there are gaps between the plurality of lithium battery modules to facilitate heat dissipation, and the series battery packs in the plurality of compartments are connected in parallel; wherein the lithium battery module is provided with two battery interface conductive blocks, which are respectively the positive and negative electrode interfaces of the lithium battery module, and the battery interface conductive blocks are provided with positioning grooves; and a box cover is installed at the top opening of the battery box, which is used to protect the lithium battery module in the battery box.

[0005] Preferably, a plurality of placement grooves are provided on the inner wall at the bottom of the battery box for placing lithium battery modules, and rubber groove blocks are fixedly installed in the placement grooves for protecting the lithium battery modules. The lithium battery modules are placed in the rubber groove blocks and matched with the rubber groove blocks.

[0006] Preferably, the top of the battery box is provided with a plurality of threaded holes, and the box cover is provided with a plurality of mounting holes, the positions of the mounting holes correspond one to one with the positions of the threaded holes, and screws are used to penetrate the mounting holes and be threadedly connected with the threaded holes to fix the box cover to the top of the battery box.

[0007] Preferably, a plurality of series components are provided on the box cover, which are used for connecting a plurality of lithium battery modules in the same partition chamber in series. The series components include a series copper sheet and two conductive plug rods. The series copper sheet is fixedly mounted on the bottom of the box cover. The two conductive plug rods are both arranged at the bottom of the series copper sheet and are integrally formed with the series copper sheet. The two conductive plug rods are inserted into two slots of two battery interface conductive blocks with opposite polarities on two adjacent lithium battery modules, and the series copper sheet is in contact with the two battery interface conductive blocks.

[0008] Preferably, a parallel assembly is provided on the box cover, which is used to connect the series battery groups in the multiple divided chambers in parallel, and the parallel assembly includes: two first positive parallel copper sheets and two first negative parallel copper sheets, both of which are fixedly installed at the bottom of the box cover, and two conductive plug rods are also provided at the bottom of the first positive parallel copper sheet and the first negative parallel copper sheet, which are used to be inserted into the positioning grooves of the corresponding two lithium battery modules in the two adjacent divided chambers; four connecting copper rods are respectively fixedly installed on the tops of the two first positive parallel copper sheets and the two first negative parallel copper sheets; and four connecting copper rods are fixedly embedded in the box. A second positive parallel copper sheet and a second negative parallel copper sheet on the top of the cover, the second positive parallel copper sheet is fixedly connected to the two connecting copper rods on the top of the two first positive parallel copper sheets, and the second negative parallel copper sheet is fixedly connected to the two connecting copper rods on the top of the two first negative parallel copper sheets; a positive electrode connecting post fixedly mounted on the top of the second positive parallel copper sheet and a negative electrode connecting post fixedly mounted on the top of the second negative parallel copper sheet, the positive electrode connecting post and the negative electrode connecting post are provided with locking screws for fixing the connectors of the external connecting wires to the positive electrode connecting post and the negative electrode connecting post using nuts.

[0009] Preferably, two insulating cover sheets are fixedly mounted on the top of the box cover, for covering the second positive electrode parallel copper sheet and the second negative electrode parallel copper sheet.

[0010] Preferably, a rubber pad is fixedly mounted on the bottom of the box cover to press the top of the lithium battery module to fix the lithium battery module stably.

[0011] Preferably, side wing panels integrally formed with the battery box are provided on both sides of the top of the battery box, and a plurality of fixing holes are provided on the side wing panels. A plurality of supporting bridge frames are provided at the bottom and both sides of the battery box, and two fixing holes are also provided on the top of the supporting bridge frame, and fixing bolts are passed through the fixing holes on the supporting bridge frame and the side wing panels to fix the battery box on the frame.

[0012] Preferably, a plurality of strip groove blocks are provided on one side of the lithium battery module, and a rubber strip is fixedly embedded therein to resist the adjacent lithium battery modules, and a plurality of strip groove blocks and rubber strip are also installed on the side wall of the partition chamber to resist the lithium battery module and improve the stability of the lithium battery module in the battery box.

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

[0014] Preferably, a plurality of air supply components are provided on the front side of the battery box for supplying air into the gaps between the lithium battery modules to accelerate heat dissipation, and the air supply components include: an air duct shell fixedly mounted on the front side of the battery box, the air duct shells of the plurality of air supply components being integrally formed; a sealing baffle fixedly mounted in the air duct shell, a rotating shaft being rotatably mounted on the sealing baffle; a driving blade and a supply fan respectively fixedly mounted on both ends of the rotating shaft, the driving blade being used to rotate by wind when the vehicle is driving, and the supply fan being used to force air into the battery box; wherein a plurality of air vents are provided on both sides and the cross baffle of the battery box to communicate with the inside of the air duct shell.

[0015] Preferably, the rear side of the battery box is equipped with a cooling mechanism for cooling the hot air exhausted from the battery box, the cooling mechanism comprising: a liquid tank fixedly mounted on the rear side of the battery box, a side of the liquid tank in contact with the battery box also having an air vent and connected to the battery box; a partition plate fixedly mounted in the liquid tank, dividing the liquid tank into an air collecting chamber and a liquid storage chamber, the liquid storage chamber being injected with coolant; a hot air pipe connected to the air collecting chamber and the liquid storage chamber, respectively, for delivering the hot air to the liquid storage chamber, an air dispersion block fixedly mounted at one end of the hot air pipe, the air dispersion block having an inner cavity and connected to the hot air pipe, and a plurality of air dispersion holes being arranged on the top of the air dispersion block for dispersing the hot air into the coolant in the liquid storage chamber; a flat cold air pipe fixedly mounted 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 shell for delivering the cooling air to the air duct shell.

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

[0017] Preferably, the tops of the multiple air duct shells are hinged with side covers for covering the air outlets of the air duct shells so that the driving fans are not affected by the wind, and a connecting plate is fixedly installed between two adjacent side covers, hinge blocks are fixedly installed at the connection positions between the connecting plate and the two air duct shells, and an electric push rod is hinged between the two hinge blocks for opening the side covers.

[0018] The present invention also provides a method for preparing a high-efficiency new energy lithium battery, which is used to prepare the high-efficiency new energy lithium battery as described above, and the method comprises the steps of:

[0019] S1. Install the lithium battery module: correctly install the lithium battery module in the rubber slot blocks in each placement slot in sequence;

[0020] S2. Install the box cover to achieve series-parallel connection: install the box 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 plug is inserted into the positioning groove, and the first positive parallel copper sheet and the first negative parallel copper sheet are also close to the corresponding battery interface conductive block, and the conductive plug at the bottom of the first positive parallel copper sheet and the first negative parallel copper sheet is also accurately inserted into the corresponding positioning groove, and each lithium battery module is connected in series and parallel, and the positive and negative poles can be connected to the joints of the load connection wire;

[0021] S3. Fix the battery box on the frame: Use fixing bolts to penetrate the fixing holes on the supporting bridge and the side wing plates, and install the battery box on the frame, that is, the fixing bolts are threadedly connected to the frame;

[0022] S4, side cover closed: When the new energy vehicle is just started in winter, the battery box is in a low temperature state, so the side cover can be kept closed, that is, the fan blades are not driven by wind;

[0023] S5, side cover open state: after the vehicle has been running for a period of time, the temperature in the battery box rises, and when heat dissipation is needed, the electric push rod is started to extend the output rod, push open the side cover, and the wind force generated by the vehicle driving the fan blades to rotate, and then drives the supply fan to rotate through the shaft. The supply fan draws cold air from the upper part of the liquid storage chamber through the cold air duct and sends it to the gap of the lithium battery module to dissipate heat. The hot air is spread into the coolant in the liquid storage chamber through the hot air duct and the air holes on the air diffuser block, thereby cooling the hot air and rising to the upper part of the liquid storage chamber to form a closed air circulation. As the temperature of the coolant rises, the heat dissipation fins will heat up and dissipate heat to the external environment to prevent the coolant temperature from being too high.

[0024] Compared with the related art, the high-efficiency new energy lithium battery and the preparation method thereof provided by the present invention have the following beneficial effects:

[0025] The high-efficiency new energy lithium battery of the present invention adopts a box cover structure, and a series component and a parallel component are arranged on the box cover. The series and parallel connection of lithium battery modules is realized by plugging conductive rods. This connection method avoids welding connection, so that when a lithium battery module needs to be maintained or replaced, the operation is simpler and faster, and no complicated welding and disassembly process is required;

[0026] The battery box is provided with a transverse partition and a longitudinal partition to divide the battery box into multiple compartments. There are gaps between the lithium battery modules in the series-connected battery pack in each compartment, which is conducive to heat dissipation.

[0027] An air supply component is arranged on the front side of the battery box. When the vehicle is driving, the driving fan blades can rotate under the action of wind, driving the air supply fan to supply air to the gaps between the lithium battery modules to accelerate heat dissipation. At the same time, a cooling mechanism is arranged on the rear side of the battery box to cool the hot air discharged from the battery box to form a closed air circulation, and 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 2 for Figure 1 An enlarged structural diagram of part A shown in FIG.

[0030] Figure 3 for Figure 1 An enlarged schematic diagram of the structure of part B shown in FIG.

[0031] Figure 4 It is a schematic diagram of the top view of the structure of the battery box, the transverse partition, the longitudinal partition, and the side wing plate in the present invention;

[0032] Figure 5 It is a top view assembly diagram of the battery box and the transverse partition, longitudinal partition, side wing plate, strip groove block and rubber stop strip in the present invention;

[0033] Figure 6 It is a top view schematic diagram of the assembly of the battery box and the lithium battery module in the present invention;

[0034] Figure 7 A schematic diagram of a front cross-sectional structure of a high-efficiency new energy lithium battery provided by the present invention;

[0035] Figure 8 for Figure 7 An enlarged schematic diagram of the structure of part C shown in FIG.

[0036] Fig. 9 It is a schematic diagram of the front cross-sectional structure of the battery box in the present invention;

[0037] Fig.10 It is a top view assembly diagram of the box cover, the second positive electrode parallel copper sheet, and the second negative electrode parallel copper sheet in the present invention;

[0038] Fig.11 It is a top view schematic diagram of the assembly of the box cover and the insulating cover sheet in the present invention;

[0039] Fig.12 A schematic diagram of the side structure of a high-efficiency new energy lithium battery provided by the present invention;

[0040] Fig.13 A first side cross-sectional structural schematic diagram of a high-efficiency new energy lithium battery provided by the present invention;

[0041] Fig.14 A second side cross-sectional structural schematic diagram of a high-efficiency new energy lithium battery provided by the present invention;

[0042] Fig.15 for Fig.14 An enlarged structural diagram of part D shown in FIG.

[0043] Fig.16 It is a three-dimensional assembly schematic diagram of the liquid tank and the heat dissipation fins in the present invention;

[0044] Fig.17 It is a schematic diagram of the top view structure of the rectangular frame in the present invention;

[0045] Fig.18 It is a schematic diagram of the three-dimensional assembly of the lithium battery module, the strip groove block and the rubber stop strip in the present invention;

[0046] Fig.19 It is a schematic diagram of the three-dimensional structure of the air duct housing in the present invention.

[0047] Figure numerals: 1, battery box; 2, transverse partition; 3, longitudinal partition; 4, partition 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 plug 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 pole connecting post; 18, negative pole connecting post; 19, locking screw; 20, insulating cover; 21, rubber pad; 22, side wing plate; 23, support bridge Frame; 24, fixing bolts; 25, fixing holes; 26, strip groove block; 27, rubber stop strip; 28, rectangular frame; 29, air duct housing; 30, sealing baffle; 31, rotating shaft; 32, driving fan blades; 33, supply fan; 34, liquid tank; 35, partition plate; 36, air collecting chamber; 37, liquid storage chamber; 38, hot air duct; 39, air dispersion block; 40, cold air duct; 41, vent hole; 42, heat dissipation fin; 43, side cover; 44, connecting plate; 45, hinge block; 46, electric push rod; 71, rubber groove block; 101, threaded hole; 901, mounting hole. DETAILED DESCRIPTION

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification of this application and the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] The present invention provides a new energy lithium battery and a method for preparing the same. Figure 1-19 As shown, the high-efficiency new energy lithium battery includes: a battery box 1, wherein a transverse partition 2 and a longitudinal partition 3 are arranged in the battery box 1, wherein the transverse partition 2 and the longitudinal partition 3 are integrally formed with the inner wall of the battery box 1, and the battery box 1 is divided into a plurality of partition chambers 4, wherein each of the partition chambers 4 is equipped with a series battery pack, wherein the series battery pack is formed by a plurality of lithium battery modules 6 connected in series, and there are gaps between the plurality of lithium battery modules 6 to facilitate heat dissipation, and the series battery packs in the plurality of partition chambers 4 are connected in parallel; wherein, two battery interface conductive blocks 7 are arranged on the lithium battery module 6, which are respectively the positive and negative electrode interfaces of the lithium battery module 6, and a positioning groove 8 is arranged on the battery interface conductive block 7; and a box cover 9 is installed on the top opening of the battery box 1 for protecting the lithium battery module 6 in the battery box 1.

[0051] In this embodiment, a transverse partition 2 and a longitudinal partition 3 are provided in the battery box 1, and are integrally formed with the inner wall of the battery box 1, so as to divide the battery box 1 into a plurality of compartments 4. Such a structural design makes the battery layout reasonable, and the series battery groups in the plurality of compartments 4 can be connected in parallel, which is beneficial to improving the overall performance of the battery. A series battery group composed of a plurality of lithium battery modules 6 connected in series is assembled in each compartment 4, and there are gaps between the lithium battery modules 6. This design is conducive to heat dissipation, can effectively prevent the battery from overheating, and improve the safety and service life of the battery. The lithium battery module 6 is provided with two battery interface conductive blocks 7 with positioning grooves 8 as positive and negative electrode interfaces, which facilitate the connection between the battery modules and ensure the conduction of the circuit. The box cover 9 installed at the top of the battery box 1 can protect the lithium battery module 6 in the battery box 1, protect the lithium battery module 6, and prevent external factors from damaging the battery.

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

[0053] In this embodiment, a plurality of placement grooves 5 are provided on the inner wall of the bottom of the battery box 1, and a rubber groove block 71 is fixedly installed in the placement groove 5, and the lithium battery module 6 is placed in the rubber groove block 71 and the two are adapted. Such a design enables the lithium battery module 6 to have a special placement position in the battery box 1, and the placement groove 5 helps to fix the position of the lithium battery module 6, while the rubber groove block 71 can protect the lithium battery module 6 and prevent the lithium battery module 6 from being damaged by collision or friction, etc., 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, a plurality of threaded holes 101 are provided on the top of the battery box 1, and a plurality of mounting holes 901 are opened on the box cover 9, and the hole positions of the mounting holes 901 correspond one to one with the hole positions of the threaded holes 101, so as to use screws to penetrate the mounting holes 901 and be threadedly connected with the threaded holes 101, so as to fix the box cover 9 on the top of the battery box 1.

[0055] In this embodiment, the top of the battery box 1 has a plurality of threaded holes 101, and the box cover 9 has a plurality of mounting holes 901 corresponding to the positions of the threaded holes 101. The box cover 9 is fixed to the top of the battery box 1 by screws penetrating the mounting holes 901 and threadedly connected with the threaded holes 101. This design ensures that the connection between the box cover 9 and the battery box 1 is stable, and can ensure that the box cover 9 well protects the lithium battery module 6 in the battery box 1 to prevent external factors from interfering with the internal battery structure. In addition, this connection method is simple and reliable, and is easy to install and disassemble.

[0056] In another embodiment of the present invention, a plurality of series components are provided on the box cover 9, which are used for connecting a plurality of lithium battery modules 6 in series in the same partition chamber 4. The series components include a series copper sheet 10 and two conductive plug rods 11. The series copper sheet 10 is fixedly mounted on the bottom of the box cover 9. The two conductive plug rods 11 are both arranged at the bottom of the series copper sheet 10 and are integrally formed with the series copper sheet 10. The two conductive plug 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 components on the box cover 9 are used for the series connection between multiple lithium battery modules 6 in the same compartment 4. The series copper sheet 10 in the series component is fixed to the bottom of the box cover 9, and the two conductive plug rods 11 integrally formed with it are inserted into the slots of the battery interface conductive blocks 7 of the opposite polarities of two adjacent lithium battery modules 6, and the series copper sheet 10 is in contact with the battery interface conductive block 7. This design makes the series connection of the lithium battery modules 6 in the same compartment 4 more convenient and regular. The connection is achieved through the series components on the box cover 9, which is conducive to improving the integration of the internal circuits of the battery and avoiding the use of welding in series and parallel connection between the lithium battery modules 6, which brings convenience to subsequent maintenance and replacement. It is only necessary to remove the box cover 9 to conveniently take out the lithium battery module 6 for replacement, which is more convenient; and it can ensure the effectiveness and stability of the battery pack series connection, thereby improving the performance of the entire lithium battery.

[0058] In another embodiment of the present invention, a parallel component is provided on the box cover 9, which is used to connect the series battery groups in multiple partitions 4 in parallel, and the parallel component includes: two first positive parallel copper sheets 12 and two first negative parallel copper sheets 13, both of which are fixedly installed at the bottom of the box cover 9, and two conductive plug rods 11 are also provided at the bottom of the first positive parallel copper sheets 12 and the first negative parallel copper sheets 13, which are used to be inserted into the positioning grooves 8 of the corresponding two lithium battery modules 6 in the two adjacent partitions; four connecting copper rods 14 are respectively fixedly installed on the tops of the two first positive parallel copper sheets 12 and the two first negative parallel copper sheets 13; all are fixedly embedded on the top of the box cover 9. 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 the two connecting copper rods 14 on the tops of the two first positive parallel copper sheets 12, and the second negative parallel copper sheet 16 is fixedly connected to the two connecting copper rods 14 on the tops of the two first negative parallel copper sheets 13; a positive electrode connecting post 17 fixedly mounted on the top of the second positive parallel copper sheet 15 and a negative electrode connecting post 18 fixedly mounted on the top of the second negative parallel copper sheet 16, the positive electrode connecting post 17 and the negative electrode connecting post 18 are provided with locking screws 19, which are used to fix the connectors of the external connecting wires on the positive electrode connecting post 17 and the negative electrode connecting post 18 using nuts.

[0059] In this embodiment, the parallel assembly on the box cover 9 is used for parallel conduction of the series battery groups in multiple compartments 4. The conductive plug rods 11 at the bottom of the two first positive parallel copper sheets 12 and the two first negative parallel copper sheets 13 are inserted into the positioning grooves 8 of the corresponding lithium battery modules 6 in the two adjacent compartments, and the four connecting copper rods 14 respectively connect the first positive parallel copper sheet 12, the first negative parallel copper sheet 13 with the second positive parallel copper sheet 15 and the second negative parallel copper sheet 16. The positive pole connecting post 17 and the negative pole connecting post 18 are respectively located at the top of the second positive parallel copper sheet 15 and the second negative parallel copper sheet 16, and a locking screw 19 is provided for fixing the external load connection wire connector. This structural design enables the series battery groups in multiple compartments 4 to achieve parallel conduction efficiently and stably, and the components are tightly and orderly connected, which is convenient for connection with external equipment, and the connection method is stable and reliable, which helps to improve the practicality and functionality of the entire high-efficiency new energy lithium battery. Furthermore, the parallel connection between the lithium battery modules 6 is avoided by welding, which brings convenience to subsequent maintenance and replacement.

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

[0061] In this embodiment, two insulating cover sheets 20 fixedly mounted on the top of the box cover 9 are used to cover the second positive parallel copper sheet 15 and the second negative parallel copper sheet 16. This design can effectively prevent the short circuit between the second positive parallel copper sheet 15 and the second negative parallel copper sheet 16 due to accidental touch or other reasons during use, thereby improving the safety of battery use. At the same time, the presence of the insulating cover sheet 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, thereby extending their service life.

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

[0063] In this embodiment, a rubber pad 21 is fixedly installed at the bottom of the box cover 9 to press the top of the lithium battery module 6. This design makes the lithium battery module 6 more stably fixed in the battery box 1, and the rubber pad 21 can provide downward pressure when the box cover 9 is closed, so as to prevent the lithium battery module 6 from shaking or shifting in the battery box 1, and reduce the problems such as loosening of the internal circuit of the battery or unstable connection between battery modules caused by shaking, thereby ensuring the normal operation and safety of the lithium battery.

[0064] In a further preferred embodiment of the present invention, side wing panels 22 integrally formed with the battery box 1 are provided on both sides of the top of the battery box 1, and a plurality of fixing holes 25 are provided on the side wing panels 22. A plurality of supporting bridge frames 23 are provided on the bottom and both sides of the battery box 1, and two fixing holes 25 are also provided on the top of the supporting bridge frame 23. Fixing bolts 24 penetrate the fixing holes on the supporting bridge frame 23 and the side wing panels 22 to fix the battery box 1 on the vehicle frame.

[0065] In this embodiment, the side wing plates 22 integrally formed on both sides of the top of the battery box 1 and the supporting bridge frames 23 at the bottom and both sides of the battery box 1, the side wing plates 22 have multiple fixing holes 25, and the top of the supporting bridge frame 23 has two fixing holes 25, and the battery box 1 is fixed to the frame by passing through the fixing holes with fixing bolts 24. This design enables the battery box 1 to be firmly installed on the frame, the integrally formed side wing plates 22 and the supporting bridge frame 23 have stable structures, and the cooperation of multiple fixing holes 25 and fixing bolts 24 ensures the firmness of the connection, reduces the possibility of shaking and displacement of the battery box 1 during vehicle driving, and ensures the safety of the battery box 1 and the normal operation of its internal lithium battery module 6 and other components.

[0066] In a further preferred embodiment of the present invention, a plurality of strip groove blocks 26 are provided on one side of the lithium battery module 6, and a rubber strip 27 is fixedly embedded therein to resist the adjacent lithium battery module 6, and a plurality of strip groove blocks 26 and a rubber strip 27 are also installed on the side wall of the partition chamber 4 to resist the lithium battery module 6 and improve the stability of the lithium battery module 6 in the battery box 1.

[0067] In this embodiment, the rubber strips 27 fixedly embedded in the multiple strip groove blocks 26 on one side of the lithium battery module 6, and the multiple strip groove blocks 26 and the rubber strips 27 on the side wall of the partition chamber 4 are used to resist the adjacent lithium battery modules 6. This design improves the stability of the lithium battery module 6 in the battery box 1 through the resisting effect of the rubber strips 27 on the lithium battery module 6, avoids collision or shaking between the lithium battery modules 6, thereby protecting the lithium battery module 6 and its internal structure, ensuring that the lithium battery module 6 in the entire battery box 1 is in a stable state, and helps 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 the 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 box cover 9, and its top is flush with the top of the side wing plate 22. The rectangular frame 28 can play a certain protective role on the box cover 9 and the components on its top (such as the power connection pole). Since it is made of rubber material, it has a certain elasticity and can buffer the impact that may be caused to the box cover 9 by the outside world. In addition, the design of being flush with the top of the side wing plate 22 makes the appearance of the entire structure more regular, which improves the structural integrity and aesthetics of the battery box 1 as a whole.

[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 gaps between the lithium battery modules 6 to accelerate heat dissipation, and the air supply components include: an air duct shell 29 fixedly mounted on the front side of the battery box 1, the air duct shell 29 among the plurality of air supply components being integrally formed; a sealing baffle 30 fixedly mounted in the air duct shell 29, a rotating shaft 31 being rotatably mounted on the sealing baffle 30; a driving blade 32 and a supply fan 33 respectively fixedly mounted on both ends of the rotating shaft 31, the driving blade 32 being used to rotate by wind when the vehicle is traveling, and the supply fan 33 being used to force air into the battery box 1; wherein a plurality of ventilation holes 41 are provided on both sides of the battery box 1 and the transverse partition 2, so that the battery box 1 is connected with the air duct shell 29.

[0071] In this embodiment, multiple air supply components are arranged on the front side of the battery box 1, and the air duct housing 29 is fixedly mounted on the front side of the battery box 1 and multiple air duct housings 29 are integrally formed, with a sealing partition 30 and a rotating shaft 31 rotatably mounted on the sealing partition 30. The two ends of the rotating shaft 31 are respectively fixedly sleeved with driving blades 32 and air supply fans 33. Multiple vents 41 are opened on both sides of the battery box 1 and the transverse partition 2 to connect the battery box 1 with the air duct housing 29. When the vehicle is running, the driving blades 32 are rotated by the wind and drive the air supply fans 33 to force air into the battery box 1, and to the gaps between the lithium battery modules 6 to accelerate heat dissipation. This design utilizes the wind resources when the vehicle is running, and the air supply components are used to dissipate heat for the lithium battery modules 6. The vents 41 ensure the air circulation path, and the integrally formed air duct housing 29 and the sealing partition 30 and other structures ensure the stability and sealing of the air supply components, effectively preventing the lithium battery modules 6 from overheating and causing performance degradation or safety hazards.

[0072] In a further preferred embodiment of the present invention, a cooling mechanism is installed at the rear side of the battery box 1 for cooling the hot air discharged from the battery box 1, and the cooling mechanism comprises: a liquid tank 34 fixedly installed at the rear side of the battery box 1, and a vent hole 41 is also opened on the side of the liquid tank 34 in contact with the battery box 1, and is connected to the battery box 1; a partition plate 35 fixedly installed in the liquid tank 34, dividing the liquid tank 34 into a gas collecting chamber 36 and a liquid storage chamber 37, and the liquid storage chamber 37 is injected with a coolant; and a partition plate 35 connected to the gas collecting chamber 36 and the liquid storage chamber 37 respectively. 6 and the hot air pipe 38 of the liquid storage chamber 37, which is used to deliver the hot air to the liquid storage chamber 37; a diffuser block 39 is fixedly installed at one end of the hot air pipe 38, the diffuser block 39 is provided with an inner cavity and is connected to the hot air pipe 38, and a plurality of diffuser holes are provided on the top of the diffuser block 39, which are used to disperse the hot air into the coolant in the liquid storage chamber 37; a flat cold air pipe 40 is fixedly installed on the top of the liquid tank 34 and is connected to the liquid storage chamber 37, and the other end of the cold air pipe 40 is connected to the air duct shell 29, which is used to deliver the cooling air to the air duct shell 29.

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

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

[0075] In this embodiment, the heat dissipation fins 42 fixedly mounted 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 to 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 in 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 tops of the plurality of air duct housings 29 are hinged with side covers 43 for covering the air outlets of the air duct housings 29 so that the driving fans are not affected by the wind, and a connecting plate 44 is fixedly installed between two adjacent side covers 43, and hinge blocks 45 are fixedly installed at the connection positions between the connecting plate 44 and the two air duct housings 29, and an electric push rod 46 is hinged between the two hinge blocks 45 for opening the side covers 43.

[0077] In this embodiment, the side cover 43 hinged at the top of the air duct housing 29 covers the air outlet of the air duct housing 29 to prevent the driving fan from being blown by the wind, and 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 air 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 driving fan from being blown by unnecessary wind when necessary, ensuring that the equipment operates as required, and the electric push rod 46 can open the side cover 43 as required, so that the operating state of the entire system can be flexibly adjusted according to actual needs, thereby improving the controllability and adaptability of the operation of the entire device.

[0078] The present invention also provides a method for preparing a high-efficiency new energy lithium battery, which is used to prepare the high-efficiency new energy lithium battery as described above, and the method comprises the steps of:

[0079] S1. Install the lithium battery module 6: correctly install the lithium battery module 6 in the rubber slot block 71 in each placement slot 5 in sequence (such as Figure 6 shown);

[0080] S2. Install the box cover 9 to realize series-parallel connection: install the box 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 plug 11 is inserted into the positioning groove 8, and 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, and the conductive plug 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 (such as Figure 1 As shown), each lithium battery module 6 is connected in series and parallel, and the positive pole connecting post 17 and the negative pole connecting post 18 can be connected to the connector of the load connecting wire;

[0081] S3, fix the battery box 1 on the frame: use the fixing bolts 24 to penetrate the fixing holes 25 on the supporting bridge frame 23 and the side wing plate 22, and install the battery box 1 on the frame, that is, the fixing bolts 24 are threadedly connected to the frame;

[0082] S4, the side cover 43 is closed: when the new energy vehicle is just started in winter, the battery box 1 is in a low temperature state, so the side cover 43 can be kept closed, that is, the driving blades 32 are not affected by wind;

[0083] S5, open side cover 43 state: after the vehicle has been running for a period of time, the temperature in the battery box 1 rises, and when heat dissipation is needed, the electric push rod 46 is started to extend the output rod and push open the side cover 43. The wind force generated by the vehicle driving the fan blades 32 rotates, and then drives the supply fan 33 to rotate through the rotating shaft 31. The supply 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 spread into the coolant in the liquid storage chamber 37 through the hot air pipe 38 and the air diffusion holes on the air diffusion 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 temperature of the coolant rises, the heat dissipation fins 42 will rise in temperature and dissipate heat to the external environment to prevent the coolant temperature from being too high.

[0084] It is worth noting that the circuits, electronic components and modules involved in the present invention are all prior art, and those skilled in the art can fully implement them. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0085] The present invention also provides a patch temperature sensor and a controller. The patch temperature sensor is arranged in 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 an existing mature technology and a well-known technology to those skilled in the art, so no unnecessary elaboration is made here.

[0086] In summary, compared with the related art, in the present invention, the connection method between the lithium battery modules 6 adopts a close-fitting plug-in series-parallel connection, which avoids welding and facilitates the maintenance and replacement of a single lithium battery module;

[0087] In terms of the structure of the battery box 1, the transverse partition 2 and the longitudinal partition 3 divide a plurality of compartments 4, and the gaps between the lithium battery modules 6 in the compartments help to dissipate heat;

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

[0089] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work 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, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A high-efficiency new energy lithium battery, characterized in that: include: A battery box (1), wherein a transverse partition (2) and a longitudinal partition (3) are arranged in the battery box (1), wherein the transverse partition (2) and the longitudinal partition (3) are integrally formed with the inner wall of the battery box (1), and the battery box (1) is divided into a plurality of compartments (4), wherein each compartment (4) is equipped with a series-connected battery pack, wherein the series-connected battery pack is formed by a plurality of lithium battery modules (6) connected in series, and gaps are provided between the plurality of lithium battery modules (6) to facilitate heat dissipation, and the series-connected battery packs in the plurality of compartments (4) are connected in parallel; Wherein, the lithium battery module (6) is provided with two battery interface conductive blocks (7), which are respectively the positive electrode and negative electrode interfaces of the lithium battery module (6), and the battery interface conductive blocks (7) are provided with positioning grooves (8); The top opening of the battery box (1) is provided with a box cover (9) for protecting the lithium battery module (6) in the battery box (1).

2. The high-efficiency new energy lithium battery according to claim 1, characterized in that: A plurality of placement grooves (5) are provided on the inner wall of the bottom of the battery box (1) for placing lithium battery modules (6). A rubber groove block (71) is fixedly installed in the placement groove (5) for protecting the lithium battery module (6). The lithium battery module (6) is placed in the rubber groove block (71) and is adapted to fit the rubber groove block (71).

3. The high-efficiency new energy lithium battery according to claim 1, characterized in that: The top of the battery box (1) is provided with a plurality of threaded holes (101), and the box cover (9) is provided with a plurality of mounting holes (901), the positions of the mounting holes (901) corresponding to the positions of the threaded holes (101) one by one, and screws are used to penetrate the mounting holes (901) and be threadedly connected to the threaded holes (101), so as to fix the box cover (9) on the top of the battery box (1).

4. The high-efficiency new energy lithium battery according to claim 1, characterized in that: Side wing plates (22) formed integrally with the battery box (1) are arranged on both sides of the top of the battery box (1), and a plurality of fixing holes (25) are arranged on the side wing plates (22). A plurality of supporting bridge frames (23) are arranged on the bottom and both sides of the battery box (1), and two fixing holes (25) are also arranged on the top of the supporting bridge frame (23). Fixing bolts (24) penetrate the fixing holes on the supporting bridge frame (23) and the side wing plates (22) to fix the battery box (1) on the vehicle frame.

5. The high-efficiency new energy lithium battery according to claim 1, characterized in that: A plurality of strip-shaped groove blocks (26) are provided on one side of the lithium battery module (6), and a rubber stop strip (27) is fixedly embedded therein for resisting adjacent lithium battery modules (6). A plurality of strip-shaped groove blocks (26) and a rubber stop strip (27) are also installed on the side wall of the partition chamber (4) for resisting the lithium battery module (6) and improving the stability of the lithium battery module (6) in the battery box (1).

6. The high-efficiency new energy lithium battery according to claim 1, characterized in that: A rectangular frame (28) is fixedly mounted on the top of the box cover (9); the rectangular frame (28) is made of rubber material, and the top is flush with the top of the side wing plate (22).

7. The high-efficiency new energy lithium battery according to claim 1, characterized in that: The front side of the battery box (1) is provided with a plurality of air supply components for supplying air into the gaps between the lithium battery modules (6) to accelerate heat dissipation, and the air supply components include: An air duct housing (29) fixedly mounted on the front side of the battery box (1), wherein the air duct housings (29) in the plurality of air supply components are integrally formed; A sealing baffle (30) fixedly mounted in the air duct housing (29), wherein a rotating shaft (31) is rotatably mounted on the sealing baffle (30); A driving fan blade (32) and a supply fan (33) are respectively fixedly mounted on both ends of the rotating shaft (31), wherein the driving fan blade (32) is used to rotate due to wind force when the vehicle is traveling, and the supply fan (33) is used to force air into the battery box (1); Wherein, a plurality of ventilation holes (41) are provided on both sides of the battery box (1) and on the transverse partition (2), so that the battery box (1) is connected with the inside of the air duct housing (29).

8. The high-efficiency new energy lithium battery according to claim 7, characterized in that: The rear side of the battery box (1) is equipped with a cooling mechanism for cooling the hot air discharged from the battery box (1), and the cooling mechanism comprises: A liquid box (34) fixedly mounted on the rear side of the battery box (1), wherein a vent hole (41) is also provided on the side of the liquid box (34) in contact with the battery box (1) and is in communication with the inside of the battery box (1); A partition plate (35) fixedly mounted in the liquid tank (34) divides the liquid tank (34) into a gas collecting chamber (36) and a liquid storage chamber (37), wherein the liquid storage chamber (37) is filled with cooling liquid; A hot air pipe (38) connected to the air collecting chamber (36) and the liquid storage chamber (37) respectively, used for delivering hot air to the liquid storage chamber (37); an air dispersion block (39) fixedly mounted at one end of the hot air pipe (38); the air dispersion block (39) is provided with an inner cavity and is connected to the hot air pipe (38); and a plurality of air dispersion holes are provided on the top of the air dispersion block (39) for dispersing the hot air into the coolant in the liquid storage chamber (37); A flat cold air pipe (40) is fixedly mounted on the top of the liquid tank (34) and is connected to the liquid storage chamber (37). The other end of the cold air pipe (40) is connected to the air duct shell (29) and is used to deliver cooling air to the air duct shell (29).

9. The high-efficiency new energy lithium battery according to claim 8, characterized in that: A heat dissipation fin (42) is fixedly mounted on one side of the liquid tank (34) for dissipating the heat of the coolant to the external environment.

10. A method for preparing a high-efficiency new energy lithium battery, characterized in that: The method is used to prepare a high-efficiency new energy lithium battery as described in claims 1 to 9 above, and the method comprises the steps of: S1, installing the lithium battery module (6): correctly clamping the lithium battery module (6) into the rubber slot block (71) in each placement slot (5) in sequence; S2. Install the box cover (9) to realize series-parallel connection: install the box cover (9) on the top of the battery box (1), at which time the series copper sheet (10) is just close to the top of the battery interface conductive block (7), and the conductive plug (11) is inserted into the positioning groove (8), and 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), and the conductive plug (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), and the series-parallel connection of each lithium battery module (6) is completed, and the positive electrode connecting post (17) and the negative electrode connecting post (18) can be connected to the connector of the load connecting wire; S3. Fix the battery box (1) on the vehicle frame: Use fixing bolts (24) to penetrate the fixing holes (25) on the supporting bridge frame (23) and the side wing plate (22) to install the battery box (1) on the vehicle frame, that is, the fixing bolts (24) are threadedly connected to the vehicle frame; S4, the side cover (43) is closed: when the new energy vehicle is just started in winter, the battery box (1) is in a low temperature state, so the side cover (43) can be kept in a closed state, that is, the driving fan blade (32) is not affected by wind force; S5, side cover (43) open state: after the vehicle has been running for a period of time, the temperature in the battery box (1) rises. When heat dissipation is required, the electric push rod (46) is started to extend the output rod and push open the side cover (43). The wind force generated by the vehicle driving the fan blades (32) rotates, and then the supply fan (33) is driven to rotate through the rotating shaft (31). The supply 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 dispersed into the coolant in the liquid storage chamber (37) through the hot air pipe (38) and the air diffusion holes on the air diffusion block (39), thereby cooling the hot air and rising to the upper part of the liquid storage chamber (37), forming a closed air cycle. As the temperature of the coolant rises, the heat dissipation fins (42) will rise in temperature and dissipate heat to the external environment to prevent the coolant temperature from being too high.

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