Standardized power battery pack

Abstract

The utility model discloses a standardized power battery pack. The standardized power battery pack comprises a box body, the standard module unit is arranged between the box bodies; the standard interface unit is arranged on the standard module unit; the BMS is arranged between the box bodies; the standard module units are mutually connected through the standard interface unit and are matched with the BMS system to form a plurality of battery packs, and the plurality of battery packs are matched in parallel or in series. By optimizing the structural layout, unifying the interface standard and the intelligent management system, the application flexibility and the overall performance of the battery system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy power batteries, and particularly relates to a standardized power battery pack. Background Art

[0002] With the rapid development of new energy fields such as electric vehicles, the power battery system, as the core component of the whole vehicle, its standardization and modularization degree become the key factors determining the overall efficiency and production efficiency of the whole vehicle. However, the design of power battery packs in the current market faces a series of challenges, especially the poor compatibility among multiple vehicle models, resulting in the difficulty of interchanging battery systems between different vehicle models, bringing many inconveniences to the production of the whole vehicle. In addition, the replacement and maintenance processes of the battery pack are cumbersome, increasing the maintenance cost and time, and it is urgent to solve these problems through technological innovation and standardized production. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art. To achieve the above purpose, a standardized power battery pack is adopted to solve the problems raised in the above background art.

[0004] A standardized power battery pack includes:

[0005] A box body;

[0006] Standard module units arranged between the box bodies;

[0007] A standardized interface unit arranged on the standard module units; and

[0008] A BMS system arranged between the box bodies;

[0009] The standard module units are interconnected through the standardized interface unit, and cooperate with the BMS system to form multiple battery packs, and the multiple battery packs are connected in parallel or in series for matching.

[0010] As a further scheme of the utility model: The battery pack further includes a box cover arranged on the upper end of the box body, a sealing ring, an explosion-proof valve, a fire extinguisher, and a two-layer liquid cooling plate arranged on the box body.

[0011] As a further scheme of the utility model: The box cover adopts a pre-impregnated PCM through a one-piece molding structure by die pressing.

[0012] As a further scheme of the utility model: The standard module unit includes a two-layer module and a one-layer module.

[0013] As a further scheme of the utility model: The two-layer liquid cooling plate includes a liquid cooling plate front cross beam, a support plate, a liquid cooling plate left longitudinal beam, a liquid cooling plate middle cross beam, a wire harness avoidance space, a liquid cooling plate rear cross beam, and a liquid cooling plate right longitudinal beam.

[0014] As a further solution of the present utility model: The box body adopts a structure formed by welding sheet metal parts through friction stir welding and gas shielded welding processes.

[0015] As a further solution of the present utility model: The box body further includes a box body front panel, a box body front cross beam, a box body right longitudinal beam, a module fixing middle cross beam, a box body bottom plate, a module fixing rear cross beam, a box body rear panel, a hanging bracket, a box body left longitudinal beam, and a module fixing front cross beam.

[0016] As a further solution of the present utility model: The BMS system includes a Hall sensor, positive and negative relays, a BMS main unit, a BMS slave unit, a high-voltage connector, and a low-voltage acquisition connector.

[0017] As a further solution of the present utility model: The standardized interface unit adopts a universal interface.

[0018] Compared with the prior art, the present utility model has the following technical effects:

[0019] By adopting the above technical solution, by setting a standard module unit between the box body and the box cover and connecting them with the standard interface unit, the optimization of the structural layout, the unification of the interface standard, and the intelligent management system are realized, and the application flexibility and overall performance of the battery system are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following will describe in detail the specific embodiments of the present utility model with reference to the drawings:

[0021] Figure 1 It is an exploded view of the battery pack of the disclosed embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the box body structure of the disclosed embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the 1P24S module structure of the disclosed embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of the two-layer liquid cooling plate structure of the disclosed embodiment of the present application.

[0025] In the figure: 1. Pre-impregnated PCM box cover; 2. Box body sealing ring; 3. Communication wire harness; 4. Second-layer module; 5. Second-layer liquid cooling plate; 6. Second-layer liquid cooling plate fixing bracket; 7. First-layer 1P24S module; 8. Box body; 9. BMS slave; 10. High-voltage charging / discharging plug (negative pole); 11. Communication plug; 12. Explosion-proof valve; 13. Negative relay; 14. MSD; 15. High-voltage charging / discharging plug (positive pole); 16. Hall sensor; 17. Positive relay; 18. BMS master; 19. Copper busbar; 20. Liquid cooling pipeline; 21. Fire extinguisher; 501. Front cross beam of liquid cooling plate; 502. Support plate; 503. Left longitudinal beam of liquid cooling plate; 504. Middle cross beam of liquid cooling plate; 505 / 507. Wire harness avoidance space; 506. Rear cross beam of liquid cooling plate; 508. Right longitudinal beam of liquid cooling plate; 801. Front panel of box body; 802. Front cross beam of box body; 803. Right longitudinal beam of box body; 804. Middle cross beam for module fixing; 805. Bottom plate of box body; 806. Rear cross beam for module fixing; 807. Rear panel of box body; 808. Hanging bracket; 809. Left longitudinal beam of box body; 810. Front cross beam for module fixing. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1 , in the embodiment of the present invention, a standardized power battery pack includes:

[0028] Box body 8;

[0029] Standard module units arranged between box bodies 8;

[0030] Standardized interface units arranged in the standard module units; and

[0031] BMS systems arranged between box bodies 8;

[0032] The standard module units are interconnected through the standardized interface units and cooperate with the BMS system to form multiple battery packs, and the multiple battery packs are connected in parallel or in series for matching.

[0033] Specifically, modular design: The battery pack adopts 8 standardized standard module units, and each module contains 24 standardized battery cells with the same size, capacity and voltage. They can be combined in series and parallel through 1P24S or 2P12S to ensure the interchangeability and consistency between the modules.

[0034] Unified interface standard: All battery modules adopt the same connection interfaces, including but not limited to high-voltage current interfaces, low-voltage communication interfaces. The high-voltage interfaces use aluminum busbars, with holes of 6.5 mm in diameter for connecting high-voltage copper bars between modules. The power battery pack adopts the same connection interfaces, including but not limited to power input / output interfaces, communication interfaces, cooling system interfaces, etc.

[0035] The standardized interface unit adopts a common interface.

[0036] Standardized battery management system: This standardized power battery pack adopts a standardized BMS, which can monitor the status of each battery module in real time, including information such as battery level, voltage, current, temperature, etc. At the same time, it has functions such as balanced charging, fault diagnosis and protection, etc., to ensure the efficient and stable operation of the entire battery pack.

[0037] Safety optimization: The power battery pack adopts multiple safety protection measures, including but not limited to using 3-mm-thick aerogel spacers with high heat insulation and high insulation between modules, using insulating and thermally conductive glue between modules and the box body, short-circuit protection, overcharge / overdischarge protection, automatic power-off at high temperature, fire extinguisher detection and activation of sprinklers, etc., to ensure the safe use of the battery pack under various working conditions.

[0038] Scalability design: According to requirements, the capacity and power of the battery system can be flexibly adjusted by increasing or decreasing the number of standardized battery modules, the number of battery cells in the module, and the series / parallel number of battery cells, to meet the requirements of different application scenarios.

[0039] In this embodiment, the battery pack further includes a box cover arranged at the upper end of the box body, a sealing ring, an explosion-proof valve, a fire extinguisher arranged on the box body 8, and a two-layer liquid cooling plate.

[0040] In this embodiment, the box cover 1 adopts a prepreg PCM through a molded-in-one structure. Specifically, the box cover 1 is formed by molding a prepreg with a main body thickness of 0.5 mm and a sealing surface thickness of 3.0 mm. Metal inserts are added inside the fixing holes on the sealing surface of the box cover. To ensure the stiffness of the upper plane of the box cover, hexagonal ribs with a height difference of 2.0 mm are designed on the upper plane.

[0041] As Figure 2 shown, the figure is a schematic diagram of the box body structure. The sealing ring 2 of the box body adopts a closed-cell foamed silica gel with a single-sided backing of 3M glue and a compression ratio of 50%. Through holes with a diameter of 9 mm are opened at the fixing holes of the box cover on the sealing ring 2.

[0042] In this embodiment, the standard module unit includes a two-layer module 4 and a one-layer module 7. Specifically, as Figure 3As shown in the figure, it is a schematic diagram of the 1P24S module structure. The two-layer 1P24S module 4 and the one-layer 1P24S module 7 are modules with the same structure, which are formed by riveting 24 91.5Ah battery cells, two end plates, an upper top plate and a lower bottom plate. A 3mm-thick aerogel spacer is bonded between two battery cells and between the battery cell and the end plate, and insulating parts with a thickness of 0.1mm are thermally melted on the inner sides of the upper top plate and the lower bottom plate.

[0043] In this embodiment, as Figure 4 shown in the figure, it is a schematic diagram of the two-layer liquid cooling plate structure. The two-layer liquid cooling plate includes a front cross beam of the liquid cooling plate, a support plate, a left longitudinal beam of the liquid cooling plate, a middle cross beam of the liquid cooling plate, a wiring harness avoidance space, a rear cross beam of the liquid cooling plate, and a right longitudinal beam of the liquid cooling plate.

[0044] In this embodiment, the box body 8 adopts a structure formed by welding a sheet metal processing part through friction stir welding and gas shielded welding processes.

[0045] In this embodiment, the box body 8 further includes a front panel of the box body, a front cross beam of the box body, a right longitudinal beam of the box body, a middle cross beam for module fixing, a bottom plate of the box body, a rear cross beam for module fixing, a rear panel of the box body, a hanging bracket, a left longitudinal beam of the box body, and a front cross beam for module fixing.

[0046] In this embodiment, the box body 8 is formed by welding a profile with a wall thickness of 1.5mm and a sheet metal processing part with a thickness of 1.5mm through friction stir welding and gas shielded welding processes. The front panel 801 and the rear panel 807 of the box body are both formed by stamping an Al5083 aluminum sheet with a thickness of 1.5mm, and through holes are cut at the positions for installing electrical components and the box cover. The front cross beam 802 of the box body, the right longitudinal beam 803 of the box body, the middle cross beam 804 for module fixing, the bottom plate 805 of the box body, the rear cross beam 806 for module fixing, the left longitudinal beam 809 of the box body, and the front cross beam 810 for module fixing all have a wall thickness of 1.5mm. The bottom plate 805 of the box body is formed into a whole by friction stir welding two aluminum alloy profiles with the same structure. The aluminum profile of the bottom plate 805 of the box body is internally provided with a cavity through which the coolant passes. The bottom plate 805 of the box body is welded to the front cross beam 802 of the box body, the rear cross beam 806 for module fixing, the right longitudinal beam 803 of the box body, the left longitudinal beam 809 of the box body, etc. to form a closed frame, where the flat welds adopt friction stir welding process and the vertical welds adopt CO2 gas shielded welding process. The middle cross beam 804 for module fixing and the front cross beam 810 for module fixing are intermittently welded to the bottom plate 805 of the box body through the CO2 gas shielded welding process. The front panel 801 and the rear panel 807 of the box body are respectively intermittently welded to the front cross beam 802 and the rear cross beam 806 for module fixing through the CO2 gas shielded welding process. Electrical component through holes are punched on the front panel 801 of the box body, and M4 or M5 waterproof nuts are riveted at the corresponding positions on the back of the front panel 801 of the box body according to the fixed positions of the electrical components and the types of fasteners. Liquid cooling inlet and outlet ports are also welded on the front panel 801 of the box body.

[0047] M6 rivet nuts are riveted on the module fixing middle crossbeam 804, the module fixing rear crossbeam 806 and the module fixing front crossbeam 810 at the module fixing positions to fix the modules.

[0048] A plurality of M5 waterproof rivet nuts are riveted at the fixing positions of the box cover on the right longitudinal beam 803 and the left longitudinal beam 809 of the box body for fixing the box cover.

[0049] In this embodiment, the BMS system includes a Hall sensor, a positive and negative relay, a BMS host, a BMS slave, a high-voltage connector, and a low-voltage collection connector.

[0050] The front crossbeam 501 of the liquid cooling plate, the left longitudinal beam 503 of the liquid cooling plate, the rear crossbeam 506 of the liquid cooling plate, the right longitudinal beam 508 of the liquid cooling plate and the support plate 502 are welded into a closed structure, and the middle crossbeam 504 of the liquid cooling plate is welded to the support plate 502. M6 rivet nuts are installed on the front crossbeam 501 of the liquid cooling plate, the rear crossbeam 506 of the liquid cooling plate and the middle crossbeam 504 of the liquid cooling plate for the installation of the second-layer module. Rivet nuts and through holes are set on the right longitudinal beam 508 of the liquid cooling plate and the left longitudinal beam 503 of the liquid cooling plate to fix the four BMS slave brackets 9 and the fire extinguisher 21 as well as the low-voltage collection harness and the second-layer liquid cooling plate itself.

[0051] The outside of the box, i.e., the front panel 801 of the box, is sequentially installed with a high-voltage charge / discharge plug-in (negative pole) 10, a communication plug-in 11, an explosion-proof valve 12, an MSD 14, a high-voltage charge / discharge plug-in (positive pole) 15, and a water inlet and outlet of a liquid cooling system.

[0052] The coolant enters from the water inlet on the right, enters the inlet of the box bottom plate 805 and the second-layer liquid cooling plate 5 through the quick-connect liquid cooling pipe 20, flows through the cavity of the box bottom plate and the second-layer liquid cooling plate, is collected from the outlet to the liquid cooling pipe 20, and flows out from the water outlet on the right.

[0053] Four 1P24S modules 7 are evenly installed on the box bottom plate 805 and fixed to the corresponding rivet nuts of the module-fixed middle beam 804, the module-fixed rear beam 806, and the module-fixed front beam 810 by long bolts.

[0054] The front and rear ends of the second-layer liquid cooling plate 5 are respectively connected to the two second-layer liquid cooling plate fixing brackets 6 by bolts through the liquid cooling plate front crossbeam 501 and the liquid cooling plate rear crossbeam 506. The left and right sides of the second-layer liquid cooling plate 5 are respectively connected to the box right longitudinal beam 803 and the box left longitudinal beam 809 by bolts through the liquid cooling plate right longitudinal beam 508 and the liquid cooling plate left longitudinal beam 503.

[0055] The BMS host is fixed on the front crossbeam 501 of the liquid cooling plate through a bracket. The four BMS slaves are respectively fixed on the right longitudinal beam 508 and the left longitudinal beam 503 of the liquid cooling plate through brackets. The BMS slaves communicate and control with the host through a communication harness.

[0056] The fire extinguisher 21 includes a sensor and a sprinkler, with wire harness communication and control therebetween, and is fixed on the left longitudinal beam 503 of the liquid cooling plate through a bracket.

[0057] A negative relay 13, a Hall sensor 16 and a positive relay 17 are also installed at the front end of the box body. The relay is used to control the opening and closing of the circuit, and the Hall sensor is used to detect the current to ensure the safety of the battery pack.

[0058] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0059] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A standardized power battery pack, characterized in that, Including: Box body; Standard module units arranged between box bodies; Standardized interface units arranged on the standard module units; And BMS system arranged between box bodies; The battery pack further includes a box cover arranged at the upper end of the box body, a sealing ring arranged on the box body, an explosion-proof valve, a fire extinguisher, and a two-layer liquid cooling plate; The standard module units are interconnected through the standardized interface units and cooperate with the BMS system to form multiple battery packs, and the multiple battery packs are connected in parallel or in series for matching.

2. The standardized power battery pack according to claim 1, characterized in that The box cover adopts a pre-impregnated PCM and is integrally formed by molding.

3. The standardized power battery pack according to claim 1, characterized in that The standard module unit includes a two-layer module and a one-layer module.

4. The standardized power battery pack according to claim 1, wherein, The two-layer liquid cooling plate includes a front cross beam of the liquid cooling plate, a support plate, a left longitudinal beam of the liquid cooling plate, a middle cross beam of the liquid cooling plate, a wiring harness avoidance space, a rear cross beam of the liquid cooling plate, and a right longitudinal beam of the liquid cooling plate.

5. The standardized power battery pack according to claim 1, wherein The box body adopts a structure formed by welding a sheet metal workpiece through friction stir welding and gas shielded welding processes.

6. The standardized power battery pack according to claim 5, characterized in that, The box body further includes a front panel of the box body, a front cross beam of the box body, a right longitudinal beam of the box body, a middle cross beam for fixing the module, a bottom plate of the box body, a rear cross beam for fixing the module, a rear panel of the box body, a hanging bracket, a left longitudinal beam of the box body, and a front cross beam for fixing the module.

7. The standardized power battery pack according to claim 1, wherein, The BMS system includes Hall sensors, positive and negative relays, a BMS main unit, a BMS slave unit, high-voltage connectors, and low-voltage acquisition connectors.

8. The standardized power battery pack according to claim 1, wherein The standardized interface unit adopts a universal interface.

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