Integrated battery pack

Abstract

The invention relates to the technical field of battery packs, in particular to an integrated battery pack which comprises a box body and a top cover, the box body comprises a front side plate, a left side plate, a rear side plate, a right side plate and a bottom plate which are connected with one another, and a high-voltage box module mounting position and a battery cell module mounting position are arranged on the surface of the bottom plate; a liquid cooling pipe fitting arrangement space is formed at the top of the high-voltage box and between the high-voltage box and the battery cell module, the liquid cooling pipe fitting arrangement space is provided with a liquid cooling pipe fitting capable of being connected with a plurality of liquid cooling plates on the battery cell module, and the liquid cooling pipe fitting comprises a liquid inlet main interface and a liquid outlet main interface; the high-voltage box module is connected with the battery cell module through an internal copper bar; and the high-voltage box module is also connected with a functional plug connector embedded in the front side plate. According to the integrated battery pack, the high-voltage box module, the battery cell modules and the like are all integrated in the same box body, parts are installed in order, independent assembly and disassembly can be achieved, the heat dissipation effect is good, and meanwhile rapid electric connection between the battery cell modules can be facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and particularly to an integrated battery pack. Background Art

[0002] Currently, new energy vehicles have received extensive attention from all sectors of society due to their excellent environmental protection performance, and the requirements for new energy vehicles are also constantly increasing. As a type of new energy vehicle, electric vehicles are also continuously developing in the direction of high safety, high energy ratio, and lightweight. The main factor determining the driving range of an electric vehicle is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet the driving requirements.

[0003] The power supply battery for an electric vehicle is generally a battery pack composed of multiple battery cell modules, that is, multiple battery cell modules are stacked in the same box body, and then the individual battery cell modules are connected. The core battery cell module is generally configured with a corresponding number of battery cells according to the magnitude of the voltage to be output, and then all the battery cells are connected to output the voltage. The voltage output of the battery module needs to be wired to the high-voltage box. Among them, the high-voltage box of the battery pack plays roles such as power management, high-voltage safety management, intelligent management, and other functions in new energy vehicles, and its performance and safety are directly related to the overall performance of the vehicle and the safety of passengers.

[0004] In traditional technologies, the high-voltage box is mostly of an external type, that is, it is arranged on the outer wall of the battery pack box body. It not only has a complex structure, a large volume, and occupies the external space of the battery pack, but also the wiring between the battery cell module in the battery pack and it is prone to chaos, and there is easy mutual interference when each functional component works. On the other hand, due to the use of the external type, the fixation with the box body and the vehicle frame is more cumbersome.

[0005] In the battery pack, in order to reduce the horizontal occupied area of the battery pack while ensuring a large enough capacitance, many battery cell modules are stacked longitudinally. To facilitate the longitudinal stacking of the individual battery cell modules, double-sided tape or a box body is usually used for longitudinal connection. This method is not only inconvenient for the longitudinal installation of the battery cell module, but also inconvenient for subsequent disassembly and maintenance after bonding. On the other hand, a large amount of heat is generated during the operation of the battery cell module. If effective heat dissipation treatment is not carried out, it will cause battery damage at least and even lead to a fire, posing a hazard to human safety. The traditional heat dissipation solution generally has a liquid cooling plate with liquid cooling heat dissipation arranged at the bottom side of the battery cell module, which can absorb the heat during the operation of the battery cell module and then discharge it outward through the coolant to achieve the purpose of heat dissipation. This method can only dissipate heat from the bottom of the battery cell, and the side of the battery cell that occupies a relatively large area is an important area for heat generation, and there is no good way in the prior art to dissipate heat from it.

[0006] Therefore, there is an urgent need for a new technical solution to solve the above technical problems. Summary of the Invention

[0007] The object of the present invention is to overcome the problems of the above-mentioned prior art, and provides an integrated battery pack, which is used to solve the problems that in the traditional technology, the external high-voltage box not only occupies the external space of the battery pack box, causing trouble for fixing to the vehicle frame, but also causes chaotic internal and external wiring when connecting the battery cell module and the high-voltage box, resulting in easy mutual interference when each functional component works; and the problems that in the prior art, it is not easy to disassemble and maintain when stacking the battery cell modules longitudinally, and only the bottom of the battery cell module can be cooled for the horizontally stacked battery cells, and the side of the battery cell cannot be effectively cooled.

[0008] The above object is achieved by the following technical solutions: An integrated battery pack includes a box body with a first installation cavity and a top cover with a second installation cavity. The box body includes a front side plate, a left side plate, a rear side plate and a right side plate which are connected to each other, and a bottom plate located at the bottom. The surface of the bottom plate is provided with a high-voltage box module installation position for installing the high-voltage box module and a battery cell module installation position for installing the battery cell module. A liquid cooling pipe fitting arrangement space is formed between the top of the high-voltage box module and between the high-voltage box module and the battery cell module. The liquid cooling pipe fitting arrangement space is provided with liquid cooling pipe fittings that can be connected to a plurality of liquid cooling plates on the battery cell module. The liquid cooling pipe fittings include an inlet liquid total interface and an outlet liquid total interface, and the inlet liquid total interface and the outlet liquid total interface are respectively connected to an inlet liquid joint and an outlet liquid joint embedded in the front side plate; the high-voltage box module is connected to the battery cell module through an internal connection copper row; the high-voltage box module is also connected to a functional plug-in part embedded in the front side plate.

[0009] Further, the battery cell module includes a battery cell module bracket for installing the battery cell module formed by longitudinally splicing a plurality of U-shaped battery cell brackets. Each battery cell bracket includes a battery cell heat insulation cotton arranged between two adjacent battery cell monomers.

[0010] Battery cell support plates, and battery cell baffles symmetrically arranged on both sides of the battery cell support plates; vertical screw through holes are respectively formed on each battery cell baffle, and the longitudinal splicing of each longitudinal battery cell bracket is realized by stringing the longitudinal screw through holes through screws; the battery cell module includes a plurality of regularly arranged battery cell units, and liquid cooling plates are arranged between adjacent battery cell units. The same ends of each liquid cooling plate are respectively provided with an inlet liquid interface and an outlet liquid interface, and each inlet liquid interface and each outlet liquid interface are respectively connected to the liquid cooling pipe fittings.

[0011] Further, the liquid cooling pipe fitting includes a liquid inlet branch pipe connected to the liquid inlet interface and a liquid outlet branch pipe connected to the liquid outlet interface; the liquid inlet branch pipe is connected to the liquid inlet main pipe through the liquid inlet sub-pipe, and the liquid inlet main interface is provided on the liquid inlet main pipe; the liquid outlet branch pipe is connected to the liquid outlet main pipe through the liquid outlet sub-pipe, and the liquid outlet main interface is provided on the liquid outlet main pipe.

[0012] Further, the liquid cooling plate includes an upper liquid cooling plate and a lower liquid cooling plate arranged in parallel, and a front liquid cooling end plate and a rear liquid cooling end plate are arranged at both ends of the upper liquid cooling plate and the lower liquid cooling plate. After the upper liquid cooling plate, the lower liquid cooling plate, the front liquid cooling end plate and the rear liquid cooling end plate are connected to each other, a liquid cooling cavity that communicates with each other is formed; the liquid inlet interface and the liquid outlet interface are provided on the front liquid cooling end plate.

[0013] Further, the battery cell unit includes 1 battery cell monomer or 2 battery cell monomers; if there are 2 battery cell monomers, a battery cell heat insulation cotton is arranged between the adjacent 2 battery cell monomers.

[0014] Further, the battery cell module further includes a CCS component module arranged on the top of the battery cell monomer. The CCS component module includes a battery cell aluminum bar connected to a plurality of the battery cell monomers and a flexible circuit board connected to the battery cell aluminum bar; a terminal card slot is provided on the battery cell baffle, and a terminal seat is clamped in the terminal card slot. The terminal seat can be connected to the battery cell aluminum bars located at both ends on the CCS component module.

[0015] Further, screw connection holes corresponding to the positions of the screw through holes are provided on the battery cell module installation position, and the screw passes through the screw through holes of the longitudinally spliced battery cell support plates and is screwed with the screw connection holes.

[0016] Further, guide posts are provided on the top of the battery cell baffle, and guide holes are provided at positions corresponding to the guide posts at the bottom of the battery cell baffle.

[0017] Further, the high-voltage box module includes a box body and a box cover that can be buckled with each other. The box body includes a rectangular box body bottom plate, a box body left side and a box body right side symmetrically arranged on the short sides of the box body bottom plate, and a box body front side and a box body rear side symmetrically arranged on the long sides of the box body bottom plate; a functional component installation position for fixedly connecting functional components is provided on the box body bottom plate. Inner connection copper row grooves are provided on the box body left side and the box body right side, and an inner connection copper row through groove is formed with the box cover; an outer connection copper row groove is provided on one side of the box cover corresponding to the box body front side, and an outer connection copper row through groove is formed with the box body front side.

[0018] Further, bolt connection parts are provided on both the left side and the right side of the box body, and bolt through holes are provided in the bolt connection parts; correspondingly, bolt connection holes corresponding to the bolt through holes are provided on the high-voltage box module installation position.

[0019] An integrated battery pack provided by the present invention realizes the longitudinal stacking of the battery cell modules through a longitudinally arranged battery cell bracket and in cooperation with a screw rod. By providing a high-voltage box module installation position and a battery cell module installation position in the box body, it is convenient for the independent installation of the high-voltage box module and the battery cell module, the wiring is more concise, and the assembly and disassembly are more convenient; by dividing the battery cells constituting the battery cell module into several battery cell units and arranging liquid cooling plates between adjacent battery cell units, the heat dissipation of the side surfaces of the battery cells is realized. This integrated battery pack integrates all components such as the high-voltage box module and the battery cell module in the same box body, the components are installed orderly, independent loading and unloading can be realized, the heat dissipation effect is good, and at the same time, the rapid electrical connection between the battery cell modules can be facilitated. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the first perspective of an integrated battery pack according to the present invention; Figure 2 It is a schematic structural diagram of the second perspective of an integrated battery pack according to the present invention; Figure 3 It is a schematic diagram of the top cover of an integrated battery pack according to the present invention being opened; Figure 4 It is a sectional view of an integrated battery pack according to the present invention; Figure 5 It is a top view of the box body in an integrated battery pack according to the present invention; Figure 6 It is an assembly diagram of the first perspective of an integrated battery pack according to the present invention; Figure 7 It is an assembly diagram of the second perspective of an integrated battery pack according to the present invention; Figure 8 It is an exploded view of the high-voltage box module in an integrated battery pack according to the present invention; Figure 9 It is an assembly schematic diagram of multiple battery cell brackets in an integrated battery pack according to the present invention; Figure 10 It is an assembly schematic diagram of multiple battery cell brackets of the battery cell module in an integrated battery pack according to the present invention; Figure 11 It is a schematic structural diagram of the battery cell module containing the CCS component module in the battery cell module in an integrated battery pack according to the present invention; Figure 12Schematic diagram of the structure of the battery cell module in the box of the integrated battery pack of the present invention; Figure 13 Assembly diagram of the battery cell module and the battery cell bracket in the integrated battery pack of the present invention; Figure 14 Schematic diagram of the structure of the liquid cooling plate in the integrated battery pack of the present invention.

[0021] Markings in the figure: 1 - Box body, 101 - First installation cavity, 102 - Front side plate, 103 - Rear side plate, 104 - Left side plate, 105 - Right side plate, 106 - Bottom plate, 107 - Pad strip, 108 - Bracket backing plate, 109 - Nut hole; 2 - Top cover, 201 - Second installation cavity; 3 - Installation position of the high - voltage box module, 301 - Bolt connection hole; 4 - Installation position of the battery cell module, 401 - Screw connection hole, 402 - Positioning post; 5 - High - voltage box module, 501 - Box body, 502 - Box cover, 503 - Bottom plate of the box body, 504 - Left side edge of the box body, 505 - Right side edge of the box body, 506 - Front side edge of the box body, 507 - Rear side edge of the box body, 508 - Functional component, 509 - Installation position of the functional component, 510 - Inner connection copper bar groove, 511 - Outer connection copper bar groove, 512 - Bolt connection part, 513 - Bolt through - hole, 514 - Slide groove, 515 - Slide piece, 516 - Clamping foot, 517 - Clamping groove; 6 - Battery cell module, 601 - Battery cell bracket, 602 - Battery cell module, 603 - CCS component module, 604 - Battery cell support plate, 605 - Battery cell baffle, 606 - Screw through - hole, 607 - Battery cell unit, 608 - Battery cell monomer, 609 - Battery cell aluminum bar, 610 - Flexible circuit board, 611 - Terminal clamping groove, 612 - Terminal seat, 613 - Guide post, 614 - Guide hole; 7 - Liquid cooling plate, 701 - Liquid inlet interface, 702 - Liquid outlet interface, 703 - Upper liquid cooling plate, 704 - Lower liquid cooling plate, 705 - Front liquid cooling end plate, 706 - Rear liquid cooling end plate; 8 - Liquid cooling pipe fittings, 801 - Liquid inlet branch pipe, 802 - Liquid inlet sub - pipe, 803 - Liquid inlet main pipe, 804 - Liquid inlet main interface, 805 - Liquid outlet branch pipe, 806 - Liquid outlet sub - pipe, 807 - Liquid outlet main pipe, 808 - Liquid outlet main interface, 809 - Liquid inlet joint, 810 - Liquid outlet joint; 9 - Inner connection copper bar; 10 - Battery cell heat insulation cotton; 11 - Screw; 12 - Functional plug - in; 13 - PC board. Detailed implementation manners

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0023] As Figures 1 to 6 shown, this solution provides an integrated battery pack, including a box body 1 having a first installation cavity 101 and a top cover 2 having a second installation cavity 201. After the box body 1 and the top cover 2 are connected to each other, the first installation cavity 101 and the second installation cavity 102 communicate with each other to form a battery installation cavity. The box body 1 includes a front side plate 102, a left side plate 104, a rear side plate 103, and a right side plate 105 that are connected to each other, and a bottom plate 106 located at the bottom. The surface of the bottom plate 106 is provided with a high-voltage box module installation position 3 for installing the high-voltage box module 5 and a battery cell module installation position 4 for installing the battery cell module module 6, and a liquid-cooling pipe fitting arrangement space is formed between the top of the high-voltage box module 5 and between the high-voltage box module 5 and the battery cell module module 6. The liquid-cooling pipe fitting arrangement space is provided with liquid-cooling pipe fittings 8 that can be connected to a plurality of liquid-cooling plates 7 on the battery cell module module 6. The liquid-cooling pipe fittings 8 include an inlet liquid total interface 804 and an outlet liquid total interface 808. The inlet liquid total interface 804 and the outlet liquid total interface 808 are respectively connected to an inlet liquid joint 809 and an outlet liquid joint 810 embedded in the front side plate 102; The high-voltage box module 5 and the battery cell module module 6 are connected by an internal connection copper row 9; The high-voltage box module 5 is also connected to a functional plug-in part 12 embedded in the front side plate 102 to facilitate the plugging of external functional components and realize functions such as charge and discharge management.

[0024] The integrated battery pack provided by this solution realizes the encapsulation of all core components constituting the battery pack through a box body, including a high-voltage box module, a liquid-cooling plate, a battery cell module module, etc.

[0025] By providing a high-voltage box module installation position 3 and a battery cell module installation position 4 on the bottom plate, it is convenient for the independent installation of the high-voltage box module 5 and the battery cell module module 6, and the liquid-cooling pipe fittings connected to each liquid-cooling plate in the battery cell module module 6 are arranged on the top of the high-voltage box module 5 and in the liquid-cooling pipe fitting arrangement space formed between the high-voltage box module 5 and the battery cell module module 6. This can not only realize the orderly installation of each component and provide a simple space in the battery pack installation cavity, but also, due to the isolation of the liquid-cooling pipe fittings 8, the high-voltage box module 5 and the battery cell module module 6 do not affect each other during operation.

[0026] For liquid cooling heat dissipation, this integrated battery pack only needs to connect the liquid inlet joint 809 and the liquid outlet joint 810 to the coolant circulation system installed in the vehicle respectively. Driven by the coolant system, the low-temperature coolant can continuously enter the liquid cooling plate 7 from the liquid cooling pipe fittings to dissipate heat from the battery cell module 6, and the heated coolant is cycled into the coolant circulation system, so as to continuously dissipate heat in this way.

[0027] It should be noted that in this embodiment, the installation position 3 of the high-voltage box module is adjacent to the front side plate 102, so as to realize short-distance connection with the functional plug-in 12 embedded on the front side plate 102 through copper bars or cables.

[0028] As Figures 9 to 13 shown, in this embodiment, the battery cell module 6 includes a battery cell module bracket for installing the battery cell module 602 formed by longitudinally splicing a plurality of U-shaped battery cell brackets 601. Each of the battery cell brackets 601 includes a battery cell support plate 604 and battery cell baffles 605 symmetrically arranged on both sides of the battery cell support plate 604; vertical screw through holes 606 are respectively formed on each of the battery cell baffles 605, and the longitudinal splicing of the battery cell brackets 601 is realized by connecting the vertical screw through holes 606 arranged longitudinally through the screws 11. The battery cell module 602 includes a plurality of regularly arranged battery cell units 607. A liquid cooling plate 7 is arranged between adjacent battery cell units 607. Liquid inlet interfaces 701 and liquid outlet interfaces 702 are respectively arranged at the same end of each of the liquid cooling plates 7. Each of the liquid inlet interfaces 701 and the liquid outlet interfaces 702 is connected to the liquid cooling pipe fittings 8.

[0029] In this embodiment, a number of battery cell units 607 are planned in the battery cell module so as to place the liquid cooling plate 7 between adjacent battery cell units 607, and the side heat dissipation of the battery cell units 607 on both sides can be realized through the liquid cooling plate. The more battery cell units are divided in the battery cell module 602, the more liquid cooling plates 7 can be installed, and thus the battery cell module 602 can be better cooled.

[0030] In addition, a battery cell module heat insulation cotton is arranged between the battery cell module 602 located in the lower layer and the battery cell bracket 601 located in the upper layer. The heat transfer between the upper and lower layers can be effectively blocked by the battery cell module heat insulation cotton.

[0031] As the first embodiment of this solution, 1 battery cell module 602 is horizontally arranged in the same battery cell bracket 601.

[0032] As the second embodiment of this solution, 2 of the said battery cell modules 602 are horizontally arranged in the same battery cell bracket 601, and two horizontally adjacent battery cell units 607 in the 2 battery cell modules 602 share one liquid cooling plate 7.

[0033] In the second embodiment, the battery cell bracket 601 provided by this solution has 3 layers and is longitudinally spliced. 2 battery cell modules 602 with the same specifications are horizontally arranged on each layer of the battery cell bracket 601. Since the 2 battery cell modules 602 are horizontally spliced, their respective battery cell units 607 are also horizontally corresponding to each other. By sharing one liquid cooling plate 7 for every 4 battery cell units 607, it is possible to achieve heat dissipation and temperature reduction for 2 battery cell modules 607 without increasing the liquid cooling plate 7, and at the same time, the laying of liquid cooling pipes is reduced, making the inside of the box body 1 more concise.

[0034] As Figures 9 to 12 shown, in this embodiment, the liquid cooling pipe fitting 8 includes an inlet liquid branch pipe 801 connected to the inlet liquid interface 701 and an outlet liquid branch pipe 805 connected to the outlet liquid interface 702; the inlet liquid branch pipe 801 is connected to the inlet liquid main pipe 803 through the inlet liquid sub-pipe 802, and the inlet liquid main pipe 803 is provided with the inlet liquid main interface 804; the outlet liquid branch pipe 805 is connected to the outlet liquid main pipe 807 through the outlet liquid sub-pipe 806, and the outlet liquid main pipe 807 is provided with the outlet liquid main interface 808. The inlet liquid main interface 804 and the outlet liquid main interface 808 are respectively connected to the inlet liquid joint 809 and the outlet liquid joint 810 embedded in the front side plate 102; Working principle: When the coolant circulation system is started, the low-temperature coolant is split from the inlet liquid main pipe 803 into the respective inlet liquid sub-pipes 802 connected thereto, and is further split into the respective inlet liquid branch pipes 801 connected thereto, and then enters the corresponding liquid cooling plate 7 to achieve heat dissipation and temperature reduction for the battery cell units 607 in contact therewith; the heated coolant continues to enter the outlet liquid branch pipe 805, converges into the outlet liquid sub-pipe 806, and then flows back to the outlet liquid main pipe 807, and finally enters the coolant circulation system through the outlet liquid main interface 808. The heated coolant entering the coolant circulation system is cooled and then split from the inlet liquid main pipe 803 into the respective inlet liquid sub-pipes 802 connected thereto, and the cycle repeats to achieve continuous heat dissipation and temperature reduction for the battery cell units 807.

[0035] As Figure 14As shown, in this embodiment, the liquid cooling plate 7 includes an upper liquid cooling plate 703 and a lower liquid cooling plate 704 arranged in parallel, and a front liquid cooling end plate 705 and a rear liquid cooling end plate 706 are provided at both ends of the upper liquid cooling plate 703 and the lower liquid cooling plate 704. The upper liquid cooling plate 703, the lower liquid cooling plate 704, the front liquid cooling end plate 705 and the rear liquid cooling end plate 706 are connected to each other to form a mutually connected liquid cooling cavity for the coolant to flow; the inlet interface 701 and the outlet interface 702 are provided on the front liquid cooling end plate 705. The inlet interface 701 corresponds to the upper liquid cooling plate 703, and the outlet interface 702 corresponds to the lower liquid cooling plate 704, so as to facilitate the circulation of the coolant in and out.

[0036] As Figure 11 and Figure 12 As shown, the battery cell unit 607 includes 1 battery cell monomer 608 or 2 battery cell monomers 608; if there are 2 battery cell monomers 608, a battery cell heat insulation cotton 10 is provided between two adjacent battery cell monomers 608. Heat is generated during the charging and discharging process of the battery. The battery cell heat insulation cotton can effectively block the heat transfer between the battery cells, avoid local overheating, and maintain the uniformity of the internal temperature of the battery. When a thermal runaway occurs in the battery cell, the heat insulation cotton can prevent the heat from being quickly transferred to adjacent battery cells, delay the spread of the thermal runaway, and reduce the risk of overall battery runaway. In addition, it also has the functions of absorbing the expansion stress generated by the battery cells during the charging and discharging process, flame retardancy, shock absorption and insulation.

[0037] As a specific embodiment of this solution, the battery cell units 607 at the two outer sides of the battery cell module are 1 battery cell monomer, while the battery cell units 607 located on the non-side are 2 battery cell monomers. This setting can conveniently provide enough discharge space for the pipeline without reducing too many battery cell monomers 608 on the battery cell module 602, so that it has sufficient power.

[0038] As an optimization of this embodiment, a PC board 13 is further provided between the battery cell module 602 and the battery cell baffle 605. The PC board 13 is a polycarbonate sheet, which has excellent optical properties, mechanical properties, heat resistance and electrical insulation properties, and can realize the side protection of the battery cell module 602.

[0039] As Figure 10 and Figure 11As shown, the battery cell module 602 further includes a CCS component module 603 disposed on the top of the battery cells 608. The CCS component module 603 includes a battery cell aluminum bar 609 connected to a plurality of the battery cells 608, and a flexible circuit board 610 connected to the battery cell aluminum bar 608. A terminal card slot 611 is provided on the battery cell baffle 605, and a terminal block 612 is clamped in the terminal card slot 611. The terminal block 612 can be connected to the battery cell aluminum bars 609 at both ends on the CCS component module 603.

[0040] In this embodiment, the CCS component module 603 is also called a battery cover plate component, which is a key electrical connection structural component in the battery module. Its main functions include: High-voltage series and parallel connection of battery cells: Realize the high-voltage series and parallel connection of battery cells in the battery module to ensure the normal operation of the battery system.

[0041] Information collection: Integrate signal collection components such as FPC and FFC to collect information such as the temperature and voltage of the battery, providing important data support for the BMS battery management system.

[0042] Safety protection: Have an overcurrent fusing function, which can quickly cut off the current when an abnormality occurs in the battery system to prevent the expansion of the fault.

[0043] By respectively providing terminal blocks 612 on the two battery cell baffles 605 of the battery cell bracket 601, it is extremely convenient for this battery cell module 602 to realize electrical connection with the battery cell modules 602 in the adjacent longitudinal direction, that is, to electrically connect the two terminal blocks 612 on the same side of the battery cell brackets 601 in the upper and lower layers through a copper bar; at the same time, it is also convenient to realize electrical connection with the high-voltage box module 5 through the terminal block 612 via the internal copper bar 9.

[0044] Compared with the traditional wire connection, this structure can effectively improve the connection efficiency between the battery cell modules 602 in the same battery cell module 6, as well as between the battery cell module 602 and the high-voltage box module 5.

[0045] As Figures 5 to 7 shown, a screw connection hole 401 corresponding to the position of the screw through hole 606 is provided on the battery cell module installation position 4. The screw 11 passes through the screw through holes 606 of the longitudinally spliced battery cell pallets 604 and is screwed with the screw connection hole 401 to realize locking the battery cell module 6 to the battery cell module installation position 4 on the surface of the bottom plate 106.

[0046] As an optimization of the box body 1 described in this embodiment, cushion strips 107 are respectively arranged between the left side plate 104 and the bottom plate 106, and between the right side plate 105 and the bottom plate 106. The screw connection holes 401 are formed in the cushion strips 107. By arranging the symmetric cushion strips 107 on the bottom plate 106, the bottom of the battery cell module 6 is lifted, so that a clamping groove is formed between the bottom plate 16 and the bottom of the battery cell module 6. This clamping groove can facilitate the subsequent installation of heat insulation cotton to isolate the heat generated during the working process between the battery cell module 6 and the bottom plate 106.

[0047] Symmetrically arranged on the bottom of the bottom plate 106 corresponding to the cushion strip 107 are support pads 108. Nut holes 109 are arranged on the support pads 108, so that the vehicle support can be connected to the support pad 108 through a support nut, and finally the box body 1 can be firmly connected to the vehicle frame.

[0048] As Figure 10 shown, guide posts 613 are arranged at the top of the battery cell baffle 605, and guide holes 614 are arranged at the bottom of the battery cell baffle 605 corresponding to the positions of the guide posts 613.

[0049] Vertically, the guide posts 613 and the guide holes 614 are located on the same vertical axis. When stacking multiple battery cell brackets 601 longitudinally, only by aligning the guide holes 614 at the bottom of the upper battery cell bracket 601 with the guide posts 613 at the top of the lower battery cell bracket 601 can the two be quickly assembled, thereby effectively improving the longitudinal stacking efficiency of each battery cell module 602.

[0050] On the other hand, when it is necessary to disassemble and maintain any layer of the battery cell module 602, only one or more battery cell brackets 601 located above the corresponding layer need to be pulled out upward and removed. Compared with traditional longitudinal bonding, the disassembly is more convenient.

[0051] In addition, in order to facilitate the battery cell module 6 to be accurately aligned with the battery cell module installation position 4 smoothly, positioning posts 402 are arranged on the battery cell module installation position 4. The positioning posts 402 can be sleeved with the guide holes 614 at the bottom of the lowermost battery cell bracket 601 of the battery cell module 6.

[0052] As Figure 8As shown in the figure, in this embodiment, the high-voltage box module 5 includes a box body 501 and a box cover 502 that can be buckled with each other. The box body 501 includes a rectangular box body bottom plate 503, a box body left side 504 and a box body right side 505 symmetrically arranged on the short side of the box body bottom plate 503, and a box body front side 506 and a box body rear side 507 symmetrically arranged on the long side of the box body bottom plate 503; A functional component installation position 509 for fixedly connecting the functional component 508 is provided on the box body bottom plate 503. Inner copper row grooves 510 are formed on the box body left side 504 and the box body right side 505, and an inner copper row through groove is formed with the box cover 502, so that the internal functional component 508 can be electrically connected to the battery cell module 6 through the inner copper row 9; On one side of the box cover 502 corresponding to the box body front side 506, an external copper row groove 511 is formed, and an external copper row through groove is formed with the box body front side 506, so that the internal functional component 508 can be electrically connected to the functional plug-in component 12 embedded on the front side plate 102 through the copper row.

[0053] As an optimization of this solution, a plurality of sliding grooves 514 are provided on the box body 501, and clamping feet 516 are provided on the sliding grooves 514; a plurality of sliding pieces 515 are provided on the box cover 502, and clamping grooves 517 for clamping the clamping feet 516 are formed on the sliding pieces 515.

[0054] It should be noted that the functional component 508 in this embodiment is a commonly used functional component of the high-voltage box module 5, including a pre-charge resistor, a relay, a Hall sensor, a fuse, etc., and they are respectively and orderly installed through the separately provided functional component installation positions 509.

[0055] Bolt connection parts 512 are provided on both the box body left side 504 and the box body right side 505, and bolt through holes 513 are provided in the bolt connection parts 512; Correspondingly, bolt connection holes 301 corresponding to the bolt through holes 513 are provided on the high-voltage box module installation position 3, and bolts are screwed through the bolt through holes 513 and the bolt connection holes 301 to firmly connect the box body 501 to the bottom plate 106 of the box body 1.

[0056] The above is only to illustrate the implementation manners of the present invention and is not used to limit the present invention. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated battery pack, characterized in that: The invention comprises a box body (1) having a first installation cavity (101) and a top cover (2) having a second installation cavity (201), the box body (1) comprising a front side plate (102), a left side plate (104), a rear side plate (103) and a right side plate (105) which are connected to each other, and a bottom plate (106) located at the bottom, the surface of the bottom plate (106) being provided with a high-voltage box module installation position (3) for installing a high-voltage box module (5) and a power core module module installation position (4) for installing a power core module module (6), and a power supply core module module installation position (5) being provided at the bottom of the high-voltage box module (5). A liquid cooling pipe arrangement space is formed at the top and between the high-voltage box module (5) and the battery module (6); the liquid cooling pipe arrangement space is provided with a liquid cooling pipe (8) that can be connected to a plurality of liquid cooling plates (7) on the battery module (6); the liquid cooling pipe (8) comprises a liquid inlet main interface (804) and a liquid outlet main interface (808); the liquid inlet main interface (804) and the liquid outlet main interface (808) are respectively connected to a liquid inlet joint (809) and a liquid outlet joint (810) embedded in the front side plate (102); The high-voltage box module (5) is connected to the battery cell module (6) via an internal copper busbar (9); The high-voltage box module (5) is also connected to a functional connector (12) embedded in the front side plate (102).

2. The integrated battery pack according to claim 1, characterized in that: The cell module module (6) comprises a cell module bracket for mounting a cell module (602) formed by longitudinally splicing a plurality of U-shaped cell brackets (601), each of the cell brackets (601) comprising a cell support plate (604) and cell baffles (605) symmetrically arranged on both sides of the cell support plate (604); each of the cell baffles (605) is respectively provided with a vertical screw through hole (606), and the longitudinally arranged screw through holes (606) are connected in series by a screw (11) to achieve splicing of the longitudinally arranged cell brackets (601); The battery cell module (602) comprises a plurality of regularly arranged battery cell units (607), the liquid cooling plates (7) being arranged between adjacent battery cell units (607), the same end of each of the liquid cooling plates (7) being respectively provided with a liquid inlet interface (701) and a liquid outlet interface (702), and each of the liquid inlet interface (701) and the liquid outlet interface (702) being respectively connected to the liquid cooling pipe fitting (8).

3. An integrated battery pack according to claim 2, characterized in that: The liquid cooling pipe fitting (8) comprises a liquid inlet branch pipe (801) connected to the liquid inlet interface (701), and a liquid outlet branch pipe (805) connected to the liquid outlet interface (702); the liquid inlet branch pipe (801) is connected to a liquid inlet main pipe (803) via the liquid inlet branch pipe (802), and the liquid inlet main pipe (803) is provided with the liquid inlet main interface (804); the liquid outlet branch pipe (805) is connected to a liquid outlet main pipe (807) via the liquid outlet branch pipe (806), and the liquid outlet main pipe (807) is provided with the liquid outlet main interface (808).

4. An integrated battery pack according to claim 2 or 3, characterized in that: The liquid cooling plate (7) comprises an upper liquid cooling plate (703) and a lower liquid cooling plate (704) which are arranged in parallel, and a front liquid cooling end plate (705) and a rear liquid cooling end plate (706) are arranged at both ends of the upper liquid cooling plate (703) and the lower liquid cooling plate (704); the upper liquid cooling plate (703), the lower liquid cooling plate (704), the front liquid cooling end plate (705) and the rear liquid cooling end plate (706) are connected to each other to form a liquid cooling cavity which is interconnected; the front liquid cooling end plate (705) is provided with the liquid inlet interface (701) and the liquid outlet interface (702).

5. The integrated battery pack according to claim 2, characterized in that: The battery cell unit (607) includes one battery cell monomer (608) or two battery cell monomers (608); if there are two battery cell monomers (608), a battery cell heat insulation cotton (10) is arranged between two adjacent battery cell monomers (608).

6. The integrated battery pack according to claim 5, characterized in that: The battery cell module (602) further comprises a CCS assembly module (603) arranged on the top of the battery cell monomer (608), the CCS assembly module (603) comprising a battery cell aluminum bar (609) connected to a plurality of the battery cell monomers (608), and a flexible circuit board (610) connected to the battery cell aluminum bar (608); a terminal slot (611) is arranged on the battery cell baffle (605), a terminal seat (612) is clamped in the terminal slot (611), and the terminal seat (612) can be connected to the battery cell aluminum bar (609) located at both ends of the CCS assembly module (603).

7. The integrated battery pack according to claim 1, characterized in that: The battery module mounting position (4) is provided with a screw connection hole (401) corresponding to the position of the screw through hole (606), and the screw (11) passes through the screw through hole (606) of each of the battery support plates (604) that are longitudinally spliced ​​and is then screwed to the screw connection hole (401).

8. The integrated battery pack according to claim 2, characterized in that: A guide column (613) is provided at the top of the battery cell baffle (605), and a guide hole (614) is provided at a position corresponding to the guide column (613) at the bottom of the battery cell baffle (605).

9. The integrated battery pack according to claim 1, characterized in that: The high-voltage box module (5) comprises a box body (501) and a box cover (502) that can be interlocked, wherein the box body (501) comprises a rectangular box body bottom plate (503), a box body left side (504) and a box body right side (505) symmetrically arranged on the short side of the box body bottom plate (503), and a box body front side (506) and a box body rear side (507) symmetrically arranged on the long side of the box body bottom plate (503); The box body bottom plate (503) is provided with a functional component mounting position (509) for fixing the functional component (508), and the box body left side (504) and the box body right side (505) are provided with an internal copper busbar groove (510) to form an internal copper busbar through groove with the box cover (502); An external copper busbar groove (511) is provided on one side of the box cover (502) corresponding to the front side edge (506) of the box body, forming an external copper busbar through groove with the front side edge (506) of the box body.

10. The integrated battery pack according to claim 9, characterized in that: A bolt connection portion (512) is provided on both the left side (504) and the right side (505) of the box body, and a bolt through hole (513) is provided on the bolt connection portion (512); Correspondingly, a bolt connection hole (301) corresponding to the bolt through hole (513) is provided on the high-voltage box module installation position (3).

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