CTP battery pack

Abstract

The utility model discloses a CTP battery pack, comprising: a frame provided with an accommodating area for accommodating a battery cell module; the liquid cooling plate assembly is detachably connected with the frame and is positioned below the framework; the battery cell module is arranged on the liquid cooling plate assembly and is positioned in the accommodating area; the heat-conducting glue is arranged between the battery cell module and the liquid cooling plate assembly; the frame is provided with a plurality of accommodating areas, the battery cell module is arranged in the accommodating areas, the crimping assembly is provided with an assembling end and a crimping end, the crimping assembly is positioned above the frame, the assembling end is detachably connected with the frame, the crimping end is arranged above each accommodating area, and the crimping end is used for pressing the battery cell module. And the crimping assembly can be detached from the frame so as to take out the battery cell module, so that the battery cell module of the CTP battery pack has maintainability, and the after-sale cost for solving the problem of the battery cell by replacing the battery pack is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of CTP battery packs, in particular to a CTP battery pack. Background Art

[0002] The power battery box is an important load-bearing structure subsystem of the power battery pack. It provides an installation and fixing structure for the most important battery cells and modules of the power battery, provides a fixing structure for the internal high and low voltage electrical modules and wiring harnesses, and at the same time connects the power battery to the whole vehicle, bearing various loads brought by the self-weight of the whole vehicle and the power battery, which is equivalent to the skeleton of the battery system.

[0003] With the increasingly fierce competition in new energy vehicles, new energy battery technologies aimed at cost reduction emerge in an endless stream. Some manufacturers pursue to make the modules in the battery pack larger, combining the original small modules into one, which can reduce the material quantity of parts such as module structural parts and high and low voltage connectors, and thus reduce the cost of the battery assembly. We call this the MTP technology of large modules. Some manufacturers pursue module-free design, making various simplifications, removals or replacement designs for the electrical connections, structural ends, side plates that make up the module except for the battery cells, and the connecting copper bars between the connecting modules. We also call this technology the CTP (Cell to Pack) technology of the battery pack, that is, the module-free technology.

[0004] The design of the CTP battery pack does not have the flexibility to repair a single battery cell, which means that once a failure occurs, we cannot repair a single battery cell. The repair work usually requires replacing the entire battery pack assembly, which undoubtedly greatly increases the after-sales repair cost of the battery pack assembly. This limitation not only brings economic pressure to users, but also affects the repair efficiency and convenience of the battery pack. Summary of the Utility Model

[0005] Therefore, it is necessary to provide a CTP battery pack to solve the problem that the CTP battery pack cannot repair a single battery cell.

[0006] To achieve the above object, the present application provides a CTP battery pack, including:

[0007] A frame, the frame is provided with a receiving area for receiving a battery cell module;

[0008] A liquid cooling plate assembly, the liquid cooling plate assembly is detachably connected to the frame and is located below the frame;

[0009] A battery cell module, the battery cell module is arranged on the liquid cooling plate assembly and is located in the receiving area;

[0010] Thermal conductive glue, the thermal conductive glue is provided between the battery cell module and the liquid cooling plate assembly; and

[0011] A crimping assembly, the crimping assembly is provided with an assembly end and a crimping end, the crimping assembly is located above the frame, the assembly end is detachably connected to the frame, and the crimping end is provided above each of the accommodating areas, and the crimping end is used to tightly press the battery cell module.

[0012] Further, the frame includes a border, and cross beams and longitudinal beams provided on the inner side walls of the border. A plurality of the accommodating areas are defined between the border, the cross beams and the longitudinal beams, and the assembly end is detachably connected to the border, the cross beams or the longitudinal beams.

[0013] Further, the crimping assembly includes a plurality of crimping beams, and each crimping beam is provided with the assembly end and the crimping end.

[0014] Further, the crimping beam detachably connected to the border is in a shape of "7"; and / or:

[0015] The crimping beam detachably connected to the cross beam or the longitudinal beam is in a shape of "T".

[0016] Further, the cross beam is higher than the longitudinal beam, and the crimping assembly further includes a connecting plate. The two crimping beams located on both sides of the cross beam are detachably connected through the connecting plate, and the connecting plate straddles the cross beam.

[0017] Further, a slot for the connecting plate to pass through is provided on the upper surface of the cross beam, and the connecting plate is detachably connected to the slot.

[0018] Further, they are detachably connected to form a frame body.

[0019] Further, it further includes a bottom guard plate, and the bottom guard plate is detachably connected to the border and is located below the liquid cooling plate assembly.

[0020] Further, the detachable connection is a bolt connection.

[0021] Further, the bolts used for the bolt connection are self-tapping screws.

[0022] Different from the prior art, the above technical solution provides a CTP battery pack. The operation of the CTP battery pack depends on the heat conduction performance of the thermal conductive adhesive and the pressing effect of the pressing component. During operation, the heat generated by the battery cell module is transferred to the liquid cooling plate assembly through the thermal conductive adhesive, and then the liquid cooling plate assembly dissipates the heat. At the same time, the pressing end of the pressing component evenly presses the battery cell module to ensure the stable position of the battery cell module in the battery pack. Compared with the traditional thermal conductive structural adhesive, although the thermal conductive adhesive in this patent loses the structural adhesion, through the compensation of the pressing component, the overall structural stability of the battery pack can still be maintained. When it is necessary to repair or replace the battery cell module, the pressing component can be removed from the frame to take out the battery cell module. This design makes the battery cell module of the CTP battery pack repairable and greatly reduces the after-sales cost of solving battery cell problems by replacing the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded view of the CTP battery pack in this embodiment;

[0024] Figure 2 is a side view of the liquid cooling plate assembly supporting the battery cell module in this embodiment;

[0025] Figure 3 is a perspective view of the frame in this embodiment;

[0026] Figure 4 is a side view of the battery cell module in this embodiment;

[0027] Figure 5 is a perspective view of the pressing component in this embodiment;

[0028] Figure 6 is a top view of the pressing component in this embodiment;

[0029] Figure 7 is a side view of the battery pack in this embodiment;

[0030] Figure 8 is Figure 7 an enlarged view of part e in

[0031] Figure 9 is Figure 7 an enlarged view of part d in

[0032] Figure 10 is a side view of the first transverse pressing beam in this embodiment;

[0033] Figure 11 is a side view of the second longitudinal pressing beam and the third longitudinal pressing beam in this embodiment;

[0034] Figure 12Stereogram of a frame formed by detachably connecting multiple crimping beams in this embodiment;

[0035] Figure 13 Side view of the frame and the liquid cooling plate assembly fastened by flow drill screws in this embodiment.

[0036] Description of reference numerals:

[0037] 1. Frame;

[0038] 10. Cross beam; 100. Slot hole;

[0039] 11. Longitudinal beam;

[0040] 12. Accommodation area;

[0041] 13. Frame border;

[0042] 2. Liquid cooling plate assembly;

[0043] 3. Battery cell module;

[0044] 4. Thermal conductive adhesive;

[0045] 5. Crimping assembly;

[0046] 50. First longitudinal crimping beam; 51. Second longitudinal crimping beam; 52. Third longitudinal crimping beam;

[0047] 53. Fourth longitudinal crimping beam; 54. Fifth longitudinal crimping beam; 55. Sixth longitudinal crimping beam;

[0048] 56. Seventh longitudinal crimping beam; 57. Eighth longitudinal crimping beam; 58. First transverse crimping beam;

[0049] 59. Second transverse crimping beam;

[0050] 500. Connection plate; 501. Fixed plate;

[0051] 502. Bolt; 503. Nut;

[0052] 504. Bolt; 505. Nut;

[0053] 506. Bolt; 507. Nut;

[0054] 6. Bottom guard plate;

[0055] 7. Reinforcement plate;

[0056] 8. Self-tapping screw. Detailed implementation method

[0057] To describe in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following is a detailed description in combination with specific embodiments and with reference to the accompanying drawings.

[0058] As used herein, the mention of "embodiment" means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any manner to form corresponding implementable technical solutions.

[0059] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which the present application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present application.

[0060] In the description of the present application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships, for example, A and / or B, which means: the existence of A, the existence of B, and the simultaneous existence of A and B. In addition, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0061] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationship between these entities or operations.

[0062] Without further limitation, in the present application, the expressions such as "including", "comprising", "having", or other similar expressions used in the statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product including the said elements, so that the process, method, or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method, or product.

[0063] Similar to the understanding in the "Examination Guidelines", in the present application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the recited number; expressions such as "above", "below", "within", etc. are understood to include the recited number. In addition, in the description of the embodiments of the present application, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0064] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the attached drawings. It is only for the convenience of describing the specific embodiments of the present application or for the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0065] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, the terms such as "installed", "connected", "joined", "fixed", "set", etc. shall be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0066] Please refer to Figures 1 to 2 , this embodiment provides a CTP (Cell to Pack) battery pack, including:

[0067] A frame 1, and the frame 1 is provided with a receiving area 12 (or called a battery cell compartment) for receiving a battery cell module 3;

[0068] A liquid cooling plate assembly 2, the liquid cooling plate assembly 2 is detachably connected to the frame 1 (such as the frame 13), and is located below the frame 1, and is used to support the battery cell module 3 received in the receiving area 12;

[0069] A battery cell module 3, the battery cell module 3 is arranged on the liquid cooling plate assembly 2 and is located in the receiving area 12;

[0070] A thermal conductive adhesive 4, a thermal conductive adhesive 4 is provided between the battery cell module 3 and the liquid cooling plate assembly 2; and

[0071] A crimping assembly 5, the crimping assembly 5 is provided with an assembly end and a crimping end, the crimping assembly 5 is located above the frame 1, the assembly end is detachably connected to the frame 1, and a crimping end is provided above each receiving area 12, and the crimping end is used to press the battery cell module 3 tightly.

[0072] Please refer to Figure 3, the frame 1 is made of high-strength metal material, with good structural strength and stability. Inside the frame 1, there is a placement area 12 for the battery cell module 3. This area is precisely designed to ensure the stable placement of the battery cell module 3. Optionally, the frame 1 is an aluminum profile welded frame 1, which can be made by welding or friction stir welding.

[0073] The liquid cooling plate assembly 2 is located below the frame 1 and is fixed to the frame 13 by a detachable connection method. It is used to bear various gravity loads under its own weight conditions from the battery cell module 3, including but not limited to impact, random vibration, etc. The liquid cooling plate assembly 2 not only plays a role in supporting the battery cell module 3, but also can effectively dissipate heat from the battery cell module 3 through the internal cooling pipes, ensuring that the battery pack maintains a stable temperature during operation. The liquid cooling plate assembly 2 is provided with an inlet and an outlet. The number, form, and position of the inlet and the outlet are slightly different for different products. Optionally, the liquid cooling plate assembly 2 is a brazed liquid cooling plate assembly 2, mainly formed by stamping an aluminum plate to form a flow channel and then brazing to form an assembled part.

[0074] Please refer to Figure 4 , the battery cell module 3 is the core part of the battery pack and is composed of multiple battery cells. The battery cell module 3 is placed on the liquid cooling plate assembly 2 and is located within the placement area 12 of the frame 1. There is a thermal conductive adhesive 4 between the battery cell module 3 and the liquid cooling plate assembly 2. This thermal conductive adhesive 4 is different from traditional structural adhesives. While losing its structural adhesion, it still maintains good thermal conductivity, ensuring the heat conduction efficiency between the battery cell module 3 and the liquid cooling plate assembly 2.

[0075] Please refer to Figure 5 , the crimping assembly 5 is located above the frame 1 and is detachably connected to the frame 1 through the assembly end. There is a crimping end above each placement area 12. These crimping ends can tightly press the battery cell module 3, effectively restricting the position of the battery cells within the battery pack. This design not only makes up for the deficiency after the thermal conductive adhesive 4 loses its structural adhesion, but also improves the overall structural stability of the battery pack.

[0076] Different from the prior art, the above technical solution provides a CTP battery pack. The operation of the CTP battery pack depends on the heat conduction performance of the thermal conductive adhesive 4 and the pressing effect of the pressing assembly 5. During operation, the heat generated by the battery cell module 3 is transferred to the liquid cooling plate assembly 2 through the thermal conductive adhesive 4, and then the liquid cooling plate assembly 2 dissipates the heat. At the same time, the pressing end of the pressing assembly 5 evenly presses the battery cell module 3 to ensure the stable position of the battery cell module 3 in the battery pack. Compared with the traditional thermal conductive structural adhesive, although the thermal conductive adhesive 4 in this patent loses its structural adhesion, through the compensation effect of the pressing assembly 5, the overall structural stability of the battery pack can still be maintained. When it is necessary to repair or replace the battery cell module 3, the pressing assembly 5 can be removed from the frame 1 to take out the battery cell module 3. This design enables the battery cell module 3 of the CTP battery pack to be repairable, greatly reducing the after-sales cost of solving battery cell problems by replacing the battery pack.

[0077] Please refer to Figure 3 , in this embodiment, the frame 1 includes a frame edge 13, as well as a cross beam 10 and a longitudinal beam 11 provided on the inner side wall of the frame edge 13. A plurality of accommodating areas 12 are defined among the frame edge 13, the cross beam 10 and the longitudinal beam 11. The assembly end is detachably connected to the frame edge 13, the cross beam 10 or the longitudinal beam 11. The cross beam 10 and the longitudinal beam 11 are respectively arranged on the inner side wall of the frame edge 13, and they cooperate with the frame edge 13 to jointly define a plurality of accommodating areas 12 for the battery cell modules 3. Through the reasonable layout of the cross beam 10 and the longitudinal beam 11, the effective partitioning and optimized layout of the accommodating areas 12 can be realized, improving the space utilization rate of the battery cell modules 3 in the battery pack.

[0078] Figure 3 As shown, the frame edge 13 is rectangular in shape. The frame 1 is provided with one cross beam 10 and four longitudinal beams 11. The cross beam 10 is arranged horizontally, and both ends are detachably connected to the two inner side walls of the frame edge 13 respectively; the longitudinal beams 11 are arranged vertically, and the four longitudinal beams 11 are divided into two groups, with two in each group. Each group of longitudinal beams 11 is located on both sides of the cross beam 10, and both ends of the longitudinal beams 11 are detachably connected to the inner side wall of the frame edge 13 and the cross beam 10 respectively. In this way, 6 accommodating areas 12 are defined among the frame edge 13, the cross beam 10 and the longitudinal beam 11. The cross beam 10, the longitudinal beam 11 and the frame edge 13 restrict the battery cell module 3. It should be noted that the number of accommodating areas 12 can be designed according to the number of battery cell modules 3. For example Figure 3 As shown, the longitudinal beams 11 in the same group have the same length, and the longitudinal beams 11 in different groups have different lengths.

[0079] Please refer to Figure 5 and Figure 6, in this embodiment, the crimping assembly 5 includes a plurality of crimping beams, and each crimping beam is provided with an assembly end and a crimping end. These crimping beams are designed and arranged according to the layout and quantity of the battery cell modules 3 in the battery pack to ensure that each battery cell module 3 can be effectively clamped and fixed. During the assembly process, the assembly ends of the crimping beams are detachably connected to the side frames 13, cross beams 10 or longitudinal beams 11 of the frame 1. Some crimping beams may be connected to only one of the side frames 13, cross beams 10, and longitudinal beams 11, or some crimping beams may be connected to multiple ones of the side frames 13, cross beams 10, and longitudinal beams 11. The connection method can be selected according to specific requirements and conditions, such as bolt connection, snap connection or welding, etc. Through precise assembly, the crimping beams can be stably installed on the frame 1 and maintain an appropriate clamping force. The use of a plurality of crimping beams realizes multi-point clamping of the battery cell modules 3, effectively improving the fixing stability of the battery cell modules 3 in the battery pack and reducing the possibility of the battery cell modules 3 loosening during transportation and use.

[0080] Figure 5 shows that the crimping assembly 5 includes a first longitudinal crimping beam 50, a second longitudinal crimping beam 51, a third longitudinal crimping beam 52, a fourth longitudinal crimping beam 53, a fifth longitudinal crimping beam 54, a sixth longitudinal crimping beam 55, a seventh longitudinal crimping beam 56, an eighth longitudinal crimping beam 57, a first transverse crimping beam 58 and a second transverse crimping beam 59. The first longitudinal crimping beam 50, the second longitudinal crimping beam 51, the third longitudinal crimping beam 52 and the fourth longitudinal crimping beam 53 are arranged in a group on one side of the cross beam 10. The first longitudinal crimping beam 50 and the fourth longitudinal crimping beam 53 are correspondingly arranged above the two side walls of the side frame 13, and the second longitudinal crimping beam 51 and the third longitudinal crimping beam 52 are correspondingly arranged above the two longitudinal beams 11.

[0081] The fifth longitudinal crimping beam 54, the sixth longitudinal crimping beam 55, the seventh longitudinal crimping beam 56 and the eighth longitudinal crimping beam 57 are also arranged in a group on the other side of the cross beam 10. The fifth longitudinal crimping beam 54 and the eighth longitudinal crimping beam 57 are correspondingly arranged above the two side walls of the side frame 13, and the sixth longitudinal crimping beam 55 and the seventh longitudinal crimping beam 56 are correspondingly arranged above the two longitudinal beams 11.

[0082] The first longitudinal crimping beam 50 and the fifth longitudinal crimping beam 54 are located above the same side wall of the side frame 13 and are on the same straight line. The fourth longitudinal crimping beam 53 and the eighth longitudinal crimping beam 57 are located above the same side wall of the side frame 13 and are on the same straight line. The second longitudinal crimping beam 51 and the sixth longitudinal crimping beam 55 are on the same straight line. The third longitudinal crimping beam 52 and the seventh longitudinal crimping beam 56 are on the same straight line.

[0083] The first longitudinal crimping beam 50, the second longitudinal crimping beam 51, the third longitudinal crimping beam 52 and the fourth longitudinal crimping beam 53 have the same length, and the fifth longitudinal crimping beam 54, the sixth longitudinal crimping beam 55, the seventh longitudinal crimping beam 56 and the eighth longitudinal crimping beam 57 have the same length.

[0084] Optionally, Figure 5 It is shown that the lengths of the first longitudinal crimping beam 50, the second longitudinal crimping beam 51, the third longitudinal crimping beam 52 and the fourth longitudinal crimping beam 53 are greater than the lengths of the fifth longitudinal crimping beam 54, the sixth longitudinal crimping beam 55, the seventh longitudinal crimping beam 56 and the eighth longitudinal crimping beam 57.

[0085] Please refer to Figures 7 to 10 , in this embodiment, the cross-sectional form and size of the crimping beam can be designed differently according to the height and weight of the battery cell. The crimping beam is manufactured by an aluminum profile extrusion process and is fixed to the nuts on the frame 13, the cross beam 10 or the longitudinal beam 11 through bolts. Specifically, the first longitudinal crimping beam 50, the fourth longitudinal crimping beam 53, the fifth longitudinal crimping beam 54 and the eighth longitudinal crimping beam 57 are respectively fixed to the nuts 503 on the corresponding frame 13 through a plurality of bolts 502, and the structure is as Figure 8 shown. The second longitudinal crimping beam 51, the third longitudinal crimping beam 52, the sixth longitudinal crimping beam 55 and the seventh longitudinal crimping beam 56 are respectively fixed to the nuts 505 on the corresponding longitudinal beam 11 through a plurality of bolts 504, and the structure is as Figure 9 shown. The first transverse crimping beam 58 and the second transverse crimping beam are respectively fixed to the nuts 507 on the corresponding frame 13 through a plurality of bolts 506, and the structure is as Figure 10 shown.

[0086] Please refer to Figure 7 , Figure 8 and Figure 9 , in this embodiment, the crimping beam detachably connected to the frame 13 is in a 7-shaped form, and the structure is as Figure 7 and Figure 8 shown; and / or: the crimping beam detachably connected to the cross beam 10 or the longitudinal beam 11 is in a T-shaped form, and the structure is as Figure 7 and Figure 9 shown. By designing crimping beams with different shapes, it is possible to adapt to battery pack boxes with different structures and sizes, improving the versatility and flexibility of the CTP battery pack box.

[0087] Please refer to Figure 7 and Figure 8 , the crimping beam detachably connected to the frame 13 is located on the side of the frame 1, and there is a battery cell module 3 on one side. For the 7-shaped crimping beam, its design feature is that it has a longer vertical part and a shorter horizontal part (corresponding to Figure 8f1 on it, that is, the crimping contact part). The vertical part serves as the assembly end for connecting with the frame 13, while the horizontal part serves as the crimping end for pressing the battery cell module 3. This design not only ensures the stability of the connection but also guarantees the effective fixation of the battery cell module 3. Preferably, the crimping beams detachably connected to the frame 13 include the first longitudinal crimping beam 50, the fourth longitudinal crimping beam 53, the fifth longitudinal crimping beam 54, the eighth longitudinal crimping beam 57, the first transverse crimping beam 58, and the second transverse crimping beam 59, and these crimping beams fix the shoulders of the battery cell module 3.

[0088] Please refer to Figure 7 and Figure 9 , the crimping beams detachably connected to the cross beam 10 or the longitudinal beam 11 are located inside the frame 1, and there are battery cell modules 3 on both sides of them. For the T-shaped crimping beam, its design feature is that it has a longer vertical part and two shorter horizontal parts (corresponding to Figure 9 f1 on it, that is, the crimping contact part). The vertical part serves as the assembly end for connecting with the cross beam 10 or the longitudinal beam 11, while the horizontal part serves as the crimping end for pressing the battery cell module 3. In particular, the two horizontal parts can crimp the battery cell modules 3 on both sides. This design enables the crimping beam to better adapt to the structural characteristics of the cross beam 10 or the longitudinal beam 11, while ensuring the uniform and stable fixation of the battery cell module 3. Preferably, the crimping beams detachably connected to the cross beam 10 or the longitudinal beam 11 include the second longitudinal crimping beam 51, the third longitudinal crimping beam 52, the sixth longitudinal crimping beam 55, and the seventh longitudinal crimping beam 56, and these crimping beams fix the shoulders of the battery cell module 3.

[0089] Please refer to Figure 10 , in this embodiment, the battery cell module 3 is higher than the frame 13, so the first transverse crimping beam 58 and the second transverse crimping beam 59 (corresponding to Figure 10 f2 on it, that is, the crimping contact part) also restrict the side wall of the battery cell module 3.

[0090] Please refer to Figure 11 , in this embodiment, the pressing beam can adopt other composite materials or the design method of a steel plate rolling structure. Or, the pressing beam can adopt the rolled closed form and the non-metallic composite material form of products, but it is a kind of design method that also plays the role of crimping the battery cells.

[0091] Please refer to Figure 1 and Figure 12, in this embodiment, the cross beam 10 is higher than the longitudinal beam 11. The crimping assembly 5 further includes a connecting plate 500. The two crimping beams located on both sides of the cross beam 10 are detachably connected through the connecting plate 500, and the connecting plate 500 spans across the cross beam 10. The connecting plate 500 is designed to be able to span across the cross beam 10, and its length and width are determined according to the size of the cross beam 10 and the installation position of the crimping beam. Both ends of the connecting plate 500 are respectively provided with connection structures matching the crimping beam, such as bolt holes or snap grooves, etc., so as to be detachably connected with the crimping beam. The two crimping beams located on both sides of the cross beam 10 are stably connected through the connecting plate 500. This connection method not only enhances the overall stability of the crimping assembly 5, but also helps to improve the fixing effect of the battery cell module 3 in the area of the cross beam 10.

[0092] Please refer to Figure 12 , in this embodiment, a slot hole 100 for the connecting plate 500 to pass through is provided on the upper surface of the cross beam 10. The slot hole 100 is recessed downward from the upper surface, and the connecting plate 500 is detachably connected with the slot hole 100. The design of the slot hole 100 needs to consider the size and shape of the connecting plate 500 to ensure that the connecting plate 500 can smoothly pass through the slot hole 100 and be stably connected with the cross beam 10. The slot hole 100 can be in a strip shape or a rectangular shape, and its length and width should be slightly larger than the thickness and width of the connecting plate 500 to allow the connecting plate 500 to have a certain movement space in the slot hole 100 for easy installation and adjustment. A connection structure matching the connecting plate 500, such as a bolt hole or a snap groove, etc., is provided at the bottom of the slot hole 100 so as to be detachably connected with the connecting plate 500. Since the slot hole 100 has a depth, the middle part of the connecting plate 500 bends downward to fit on the bottom of the slot hole 100.

[0093] Please refer to Figure 12 , in this embodiment, the crimping beams are detachably connected to form a frame. The crimping beams can be connected by bolts, snaps or other applicable detachable connection methods. These connection methods not only facilitate the assembly and disassembly of the crimping beams, but also ensure the stability and reliability of the frame structure.

[0094] Figure 12 As shown, since there are intervals between the first longitudinal crimping beam 50 and the fifth longitudinal crimping beam 54, between the second longitudinal crimping beam 51 and the sixth longitudinal crimping beam 55, between the third longitudinal crimping beam 52 and the seventh longitudinal crimping beam 56, and between the fourth longitudinal crimping beam 53 and the eighth longitudinal crimping beam 57, the first longitudinal crimping beam 50 and the fifth longitudinal crimping beam 54 are detachably connected through the fixing plate 501, the second longitudinal crimping beam 51 and the sixth longitudinal crimping beam 55 are detachably connected through the connecting plate 500, the third longitudinal crimping beam 52 and the seventh longitudinal crimping beam 56 are detachably connected through the connecting plate 500, and the fourth longitudinal crimping beam 53 and the eighth longitudinal crimping beam 57 are detachably connected through the fixing plate 501.

[0095] Please refer to Figure 7 , in this embodiment, the CTP battery pack further includes a reinforcing plate 7, which is disposed between two battery cell modules 3. The reinforcing plate 7 can be a metal aluminum plate or a non-metallic composite material, and is used to limit the battery cell module 3 to prevent it from shaking too much.

[0096] Please refer to Figure 1 , in this embodiment, the CTP battery pack further includes a bottom protection plate 6, which is detachably connected to the frame 13 and is located below the liquid cooling plate assembly 2. The bottom protection plate 6 can protect the bottom of the battery pack from foreign object impacts from the ground and protect the safety of the battery. Generally speaking, the bottom protection plate 6 is mainly a high-strength stamping steel plate product, and there are also different products that use a non-metallic composite material bottom protection plate 6 in order to reduce the product weight.

[0097] In this embodiment, the detachable connection involved is preferably a bolt connection. The bolt connection has excellent stability and reliability. As a fastener, the tightening force of the bolt can be controlled by adjusting the tightening torque of the bolt, so as to ensure the stability and reliability of the connection. For example, the frame 13 and the liquid cooling plate assembly 2, the frame 13 and the bottom protection plate 6, the crimping beam and the crimping beam, the crimping beam and the frame 13 / cross beam 10 / longitudinal beam 11 all use bolt connections. During the assembly process of the CTP battery pack box body, the bolt connection can effectively connect components such as the frame 13, the bottom protection plate 6, and the crimping beam firmly together to form a stable overall structure, ensuring the safety and stability of the battery pack.

[0098] Please refer to Figure 13 , in this embodiment, for some components, the bolts used in the bolt connection are self-tapping screws 8, especially the frame 13 and the liquid cooling plate assembly 2 are fastened by the flow drill screw process (FDS, Flow Drill Screw).

[0099] Hereinafter, the beneficial effects of the present application are described:

[0100] 1. Regarding the problem that the battery cells of the CTP battery pack are not repairable based on the FDS connection technology of the brazed cold plate, the commonly used thermal conductive structural adhesive in the market is changed to the thermal conductive adhesive 4. While the glue loses its structural adhesion, the newly designed crimping component 5 makes up for the role of the glue's structural adhesion, and can effectively restrain the battery cells to form the overall CTP battery pack;

[0101] 2. The repair of the battery cell module 3, which accounts for the vast majority of the cost value in the battery pack, becomes operable, ending the repair method of only replacing the battery pack after-sales, and greatly reducing the after-sales repair cost.

[0102] 3. The battery pack manufacturing process can be more flexible. The battery cells can be stacked by robots or manually and transferred into the box body, making the battery pack production line more flexible.

[0103] 4. Under the crimping action of the crimping beam on the battery pack cells, the overall strength and stiffness of the battery pack are further improved, and the overall mode of the battery pack is further improved.

[0104] It should be noted that although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, any changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, and directly or indirectly applying the above technical solutions to other related technical fields are all included in the patent protection scope of the present invention.

Claims

1. A CTP battery pack, characterized in that: include: A frame, wherein the frame is provided with a receiving area for receiving the battery cell module; a liquid cooling plate assembly, the liquid cooling plate assembly being detachably connected to the frame and being located below the frame; A battery cell module, the battery cell module is arranged on the liquid cooling plate assembly and is located in the accommodating area; Thermally conductive adhesive, which is disposed between the battery module and the liquid cooling plate assembly; and A crimping assembly, wherein the crimping assembly is provided with an assembly end and a crimping end, the crimping assembly is located above the frame, the assembly end is detachably connected to the frame, and the crimping end is provided above each of the accommodating areas, and the crimping end is used to compress the battery cell module.

2. The CTP battery pack according to claim 1, characterized in that: The frame includes a frame and a crossbeam and a longitudinal beam arranged on the inner side wall of the frame. A plurality of accommodating areas are surrounded by the frame, the crossbeam and the longitudinal beam. The assembly end is detachably connected to the frame, the crossbeam or the longitudinal beam.

3. The CTP battery pack according to claim 2, characterized in that: The crimping assembly comprises a plurality of crimping beams, each of which is provided with the assembly end and the crimping end.

4. The CTP battery pack according to claim 3, characterized in that: The crimping beam detachably connected to the frame is in a 7-shape; and / or: The crimping beam detachably connected to the cross beam or the longitudinal beam is T-shaped.

5. The CTP battery pack according to claim 3, characterized in that: The cross beam is higher than the longitudinal beam, and the crimping assembly further includes a connecting plate, through which the two crimping beams located on both sides of the cross beam are detachably connected, and the connecting plate spans the cross beam.

6. The CTP battery pack according to claim 5, characterized in that: The upper surface of the crossbeam is provided with a slot hole for the connecting plate to pass through, and the connecting plate is detachably connected to the slot hole.

7. The CTP battery pack according to claim 3, characterized in that: A plurality of the crimping beams are detachably connected to form a frame.

8. The CTP battery pack according to any one of claims 2 to 7, characterized in that: It also includes a bottom guard plate, which is detachably connected to the frame and is located below the liquid cooling plate assembly.

9. The CTP battery pack according to claim 1, characterized in that: The detachable connection is a bolt connection.

10. The CTP battery pack according to claim 9, characterized in that: The bolts used in the bolt connection are self-tapping screws.

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