Ctp power battery pack

Abstract

This utility model relates to the field of power battery technology and provides a CTP power battery pack, including: a lower shell, a battery module, and a reinforcing assembly; at least one receiving groove is formed in the lower shell; the battery module includes multiple cells and multiple busbars, with adjacent cells connected in series through the busbars, and at least one battery module is disposed in the receiving groove; the reinforcing assembly includes a tensile plate and a fastening band, the tensile plate is connected to the multiple busbars along the X direction, the fastening band is disposed along the X direction, the first end of the fastening band is connected to the first end of the lower shell, the second end of the fastening band is connected to the second end of the lower shell, and the receiving groove is located between the first end and the second end of the fastening band. The CTP power battery pack provided by this utility model solves the defects of the prior art, where the CTP battery pack with the module directly inserted into the shell has limited resistance to expansion force, and the force exerted on the crossbeams and busbars when the cells expand is large, which easily causes deformation of the crossbeams and busbars, resulting in damage to the battery structure.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a CTP power battery pack. Background Technology

[0002] CTP (Cell-to-Pack) battery packs significantly improve the assembly efficiency of prismatic battery cells, expanding their application range. CTP battery packs can significantly increase the capacity and driving range of electric vehicles. They not only optimize the volume utilization of the battery pack but also enhance overall safety, thereby improving the driving range of electric vehicles and the safety performance of the battery pack.

[0003] However, existing CTP battery packs with directly inserted modules have limited resistance to expansion forces. When the cells expand, the forces exerted on the crossbeams and busbars are relatively large, which can easily cause deformation of the crossbeams and busbars, resulting in damage to the battery structure. Utility Model Content

[0004] This utility model provides a CTP power battery pack to solve the defects in the prior art, where the CTP battery pack with modules directly inserted into the shell has limited resistance to expansion force, and the force exerted on the crossbeam and busbar when the cells expand is large, which easily causes the crossbeam and busbar to deform and lead to damage to the battery structure.

[0005] This utility model provides a CTP power battery pack, including: a lower shell, a battery module and a reinforcing component.

[0006] At least one receiving groove is formed inside the lower housing; the battery module includes multiple battery cells and multiple busbars, adjacent battery cells are connected in series through the busbars, and at least one battery module is disposed in the receiving groove; the reinforcing component includes a tensile plate and a fastening band, the tensile plate is connected to multiple busbars arranged along the X direction, the fastening band is arranged along the X direction, the first end of the fastening band is connected to the first end of the lower housing, the second end of the fastening band is connected to the second end of the lower housing, and the receiving groove is located between the first end and the second end of the fastening band.

[0007] According to the CTP power battery pack provided by this utility model, the tensile plate is an insulating tensile plate; the reinforcing component also includes an insulating pad, which is located between the fastening band and the busbar, and the outer wall of the fastening band is fitted with an insulating layer, which is connected to the insulating pad.

[0008] According to the CTP power battery pack provided by this utility model, the busbar includes a recessed portion and a first connecting portion located on both sides of the recessed portion. The first connecting portion is electrically connected to the terminal post of the battery cell, and at least a portion of the insulating pad is located within the recessed portion.

[0009] According to the CTP power battery pack provided by this utility model, the insulating tensile plate is bonded to the busbar, and the insulating pad is bonded to the insulating layer.

[0010] According to the CTP power battery pack provided by this utility model, the fastening strap includes a main body and a second connecting part located at both ends of the main body. The main body and the second connecting part are perpendicularly connected, and the second connecting part is connected to the side wall of the lower housing. The lower housing is provided with a first support member, and the end of the first support member at least partially abuts against the main body and the second connecting part to support the fastening strap.

[0011] According to the CTP power battery pack provided by this utility model, the end of the first support member is fitted with the connection between the main body and the second connecting part.

[0012] According to the CTP power battery pack provided by this utility model, the lower housing includes a bottom plate, a frame and a crossbeam, and the bottom plate, the frame and the crossbeam together form at least one receiving groove; along the X direction, a second support member is provided at the first end and the second end of the lower housing, and the end of the second support member abuts against the crossbeam at the corresponding end to support the crossbeam at the corresponding end.

[0013] According to the CTP power battery pack provided by this utility model, the reinforcing component is located above the busbar, and the projection of the reinforcing component in the Z direction at least partially covers the busbar.

[0014] According to the CTP power battery pack provided by this utility model, along the X direction, the ratio of the width of the tensile plate to the length of the cell is 0.08 to 0.35; and / or, the thickness of the tensile plate is greater than or equal to 2 mm.

[0015] According to the CTP power battery pack provided by this utility model, along the X direction, the lower housing has a plurality of receiving slots, and each receiving slot is provided with a plurality of battery modules along the Y direction; the battery module includes a plurality of cell units arranged along the Y direction, and the cell unit includes a plurality of cells arranged along the X direction.

[0016] The CTP power battery pack provided by this utility model has a reinforcing component. In the reinforcing component, the tensile plate is connected to multiple busbars along the X direction, which can constrain the busbars when the battery cell expands, thereby improving the tensile performance of the busbars. At the same time, in the reinforcing component, the fastening band is set along the X direction (the thickness direction of the battery cell, the main expansion direction), and its two ends are connected to the first end and the second end of the lower shell, respectively. This can tighten and reinforce the lower shell along the X direction when the battery cell expands, preventing the lower shell from deforming.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is one of the schematic diagrams of the CTP power battery pack provided in this embodiment of the utility model.

[0020] Figure 2 This is the second schematic diagram of the CTP power battery pack provided in this embodiment of the utility model (hidden reinforcement component).

[0021] Figure 3 This is the third schematic diagram of the CTP power battery pack provided in this embodiment of the utility model (hidden fastening strap).

[0022] Figure 4 This is an exploded view of the CTP power battery pack provided in this embodiment of the utility model (with hidden fastening straps).

[0023] Figure 5 This is a schematic diagram of the installation of the fastening strap in the CTP power battery pack provided in this embodiment of the utility model.

[0024] Figure 6 This is a schematic diagram of the busbar in the CTP power battery pack provided in this embodiment of the utility model.

[0025] Figure 7 This is a schematic diagram of the fastening strap in the CTP power battery pack provided in this embodiment of the utility model.

[0026] Figure 8 This is a schematic diagram of the lower casing of the CTP power battery pack provided in this embodiment of the utility model.

[0027] Figure 9 This is one of the schematic diagrams of the battery module in the CTP power battery pack provided in this embodiment of the utility model.

[0028] Figure 10 This is the second schematic diagram of the battery module in the CTP power battery pack provided in this embodiment of the utility model.

[0029] Figure 11 This is a schematic diagram of the installation of the battery module in the CTP power battery pack provided in this embodiment of the utility model.

[0030] Figure label:

[0031] 100. Lower housing; 110. Receiving groove; 120. First support member; 130. Base plate; 140. Frame; 150. Crossbeam; 160. Second support member; 200. Battery module; 210. Cell unit; 211. Cell; 220. Busbar; 221. Recess; 222. First connecting part; 230. Heat insulation plate; 240. End plate; 250. Filler pad; 300. Reinforcing component; 310. Tensile plate; 320. Fastening band; 321. Main body; 322. Second connecting part; 330. Insulating pad; 340. Insulating layer. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0035] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] The following is combined with Figures 1 to 11 This invention describes the CTP power battery pack provided by this utility model.

[0038] It should be noted that in the embodiments of this utility model, the X, Y, and Z directions can all be referenced. Figure 1 The arrows shown in the diagram indicate the direction of the thickness of the battery cell 211 or the length of the lower housing 100. The Y direction can be understood as the width of the lower housing 100, and the Z direction can be understood as the height of the lower housing 100.

[0039] See Figures 1 to 4 As shown, the CTP power battery pack provided in this embodiment of the present invention includes: a lower housing 100, a battery module 200, and a reinforcing component 300.

[0040] At least one receiving groove 110 is formed in the lower housing 100; the battery module 200 includes a plurality of battery cells 211 and a plurality of busbars 220, adjacent battery cells 211 are connected in series through the busbars 220, and at least one battery module 200 is provided in the receiving groove 110; the reinforcing component 300 includes a tensile plate 310 and a fastening band 320, the tensile plate 310 is connected to a plurality of busbars 220 arranged along the X direction, the fastening band 320 is arranged along the X direction, the first end of the fastening band 320 is connected to the first end of the lower housing 100, the second end of the fastening band 320 is connected to the second end of the lower housing 100, and the receiving groove 110 is located between the first end and the second end of the fastening band 320.

[0041] The CTP power battery pack provided by this utility model, by setting a reinforcing component 300, in which a tensile plate 310 is connected to multiple busbars 220 along the X direction, can constrain the busbars 220 when the cell 211 expands, thereby improving the tensile performance of the busbars 220. At the same time, in the reinforcing component 300, a fastening band 320 is set along the X direction (the thickness direction of the cell 211, the main expansion direction), and its two ends are respectively connected to the first end and the second end of the lower housing 100. This can tighten and reinforce the lower housing 100 along the X direction when the cell 211 expands, thereby preventing the lower housing 100 from deforming.

[0042] Specifically, the CTP power battery pack includes a lower housing 100, a battery module 200, and a reinforcing component 300.

[0043] The lower housing 100 is primarily used to support and protect the battery module 200. The lower housing 100 has at least one receiving groove 110 for installing the battery module 200, ensuring that the battery module 200 does not shift or loosen during operation. Simultaneously, the lower housing 100 also protects the battery module 200 from damage caused by external impacts or vibrations.

[0044] Within the lower housing 100, the number of receiving slots 110 is at least one (i.e., one or more), and is set according to the battery pack specifications, without any special limitation. For example, for battery packs with different capacity and power requirements, the number of receiving slots 110 can be flexibly adjusted according to the size and configuration of the battery module 200. For larger capacity battery packs, more receiving slots 110 can be set to accommodate multiple battery modules 200, thereby meeting higher energy demands; while for smaller capacity battery packs, only one receiving slot 110 may be needed.

[0045] The battery module 200 is a core component of the CTP power battery pack, primarily used for storing and providing electrical energy. It includes multiple battery cells 211 and multiple busbars 220. Adjacent battery cells 211 are connected in series via busbars 220 to achieve the required voltage and capacity output. Furthermore, when multiple battery modules 200 are included, adjacent battery cells 211 of adjacent battery modules 200 are also connected in series via busbars 220. By controlling the series connection method of the busbars 220, the number of output terminals of the battery module 200 can be controlled.

[0046] As an example, in this embodiment, two receiving slots 110 are formed in the lower housing 100 along the X direction. Each receiving slot 110 is provided with three battery modules 200 along the Y direction. Multiple busbars 220 are arranged in an "S" shape to connect each cell 211 in series, so that the battery pack has only two output poles, which is convenient to install and has low cost.

[0047] The reinforcing component 300 is used to enhance the deformation resistance of the busbar 220 and the lower housing 100, ensuring that the busbar 220 and the lower housing 100 can be reinforced and protected when the cell 211 expands. The reinforcing component 300 includes a tensile plate 310 and a fastening band 320. The tensile plate 310 is connected to multiple busbars 220 arranged along the X direction to enhance the tensile strength of the multiple busbars 220 arranged along the X direction. When the cell 211 expands, the busbar 220 tends to stretch along the X direction. The tensile plate 310 can effectively share and resist this tensile force, reducing the deformation of the busbar 220 or preventing the busbar 220 from deforming. The fastening band 320 is set along the X direction (the thickness direction of the cell 211, the main expansion direction), and its two ends are connected to the first end and the second end of the lower housing 100 respectively. It can tighten and reinforce the lower housing 100 along the X direction when the cell 211 expands, prevent the lower housing 100 from deforming, and ensure the structural integrity and stability of the battery pack.

[0048] The number of tensile plates 310 and fastening straps 320 is set according to requirements. The number of tensile plates 310 is determined by the number of busbar groups 220. For example, in this embodiment, there are 12 busbar groups 220 along the Y direction, and correspondingly 12 tensile plates 310. The number of fastening straps 320 is determined by the length of the lower housing 100 along the Y direction. For example, when the lower housing 100 is long along the Y direction, a larger number of fastening straps 320 can be provided along the Y direction to provide sufficient reinforcement; conversely, when the lower housing 100 is short along the Y direction, a smaller number of fastening straps 320 can meet the reinforcement requirements of the lower housing 100.

[0049] The tensile plate 310 and the corresponding busbar 220 can be fixed by means of bonding or mechanical connection, without particular limitation. Preferably, in this embodiment, the tensile plate 310 and the corresponding busbar 220 are bonded by structural adhesive. Structural adhesive has excellent bonding strength and environmental resistance, effectively and tightly connecting the tensile plate 310 and the busbar 220. The two ends of the fastening band 320 can be fixed to the lower housing 100 by welding, bolting, or riveting, without particular limitation. See also Figure 5 As shown, in this preferred embodiment, both ends of the fastening strap 320 are riveted to the side wall of the lower housing 100. Riveting is an efficient and strong connection method that can ensure a tight connection between the fastening strap 320 and the lower housing 100 and provide a reliable and long-term stable connection. Especially in high vibration and high load environments, the riveted position can effectively withstand external forces and reduce the risk of loosening.

[0050] The tensile plate 310 and the fastening band 320 are preferably made of materials with high structural strength and strong weather resistance to meet the requirements of strength and long-term stable use. As an example, in this embodiment, the tensile plate 310 is made of an insulating material with high structural strength, such as epoxy resin, polycarbonate or phenolic resin; the fastening band 320 is made of a metal material with high structural strength, such as stainless steel or aluminum alloy.

[0051] Preferably, at least part of the tensile plate 310 and fastening strap 320 of the reinforcing component 300 are arranged adjacent to each other to improve the compactness of the reinforcing component 300 and facilitate centralized assembly and disassembly maintenance. At the same time, the adjacent tensile plate 310 and fastening strap 320 can also cover and shield the busbar 220, avoiding large-area exposure and improving the safety performance of the battery.

[0052] See Figure 3 As shown, according to some embodiments of the present invention, the tensile plate 310 is an insulating tensile plate; the reinforcing component 300 also includes an insulating pad 330, which is located between the fastening band 320 and the busbar 220. The outer wall of the fastening band 320 is fitted with an insulating layer 340, which is connected to the insulating pad 330.

[0053] By designing the tensile plate 310 as an insulating tensile plate, electrical connection between the tensile plate 310 and the busbar 220 can be avoided, preventing the tensile plate 310 from causing a short circuit in the cell 211. Similarly, the insulating pad 330 can also separate the fastening band 320 from the busbar 220, preventing direct contact between the fastening band 320 and the busbar 220 from causing a short circuit in the cell 211. The outer wall of the fastening band 320 is fitted with an insulating layer 340, which can achieve double insulation and further improve the safety factor of the battery pack.

[0054] See Figure 2 and Figure 6 As shown, according to some embodiments of the present invention, the busbar 220 includes a recess 221 and a first connecting portion 222 located on both sides of the recess 221. The first connecting portion 222 is electrically connected to the terminal post of the battery cell 211, and at least a portion of the insulating pad 330 is located inside the recess 221.

[0055] By providing a recess 221 in the middle of the busbar 220, at least a portion of the insulating pad 330 can be disposed in the recess 221, thereby preventing the insulating pad 330 from occupying the thickness space of the battery pack and improving the overall integrity of the battery pack.

[0056] It should be noted that, provided that there is no interference with the top of the battery cell 211, the depth of the recess 221 can be designed according to actual needs. For example, the depth of the recess 221 can be less than the thickness of the insulating pad 330, in which case the portion of the insulating pad 330 along the Z direction can be accommodated within the recess 221; or it can be greater than or equal to the thickness of the insulating pad 330, in which case the insulating pad 330 can be completely accommodated within the recess 221.

[0057] According to some embodiments of the present invention, the insulating tensile plate is bonded to the busbar 220, and the insulating pad 330 is bonded to the insulating layer 340.

[0058] By bonding the insulating tensile plate to the busbar 220 and the insulating pad 330 to the insulating layer 340, the overall structural stability and safety of the battery pack can be effectively improved. At the same time, bonding does not introduce mechanical connection structures, avoiding the space occupation caused by mechanical connections and further enhancing the compactness of the battery pack.

[0059] As an example, the insulating tensile plate is bonded to the busbar 220 using structural adhesive, and the insulating pad 330 is bonded to the insulating layer 340 using structural adhesive. The structural adhesive possesses excellent bonding properties, good high-temperature resistance, and corrosion resistance, maintaining a stable bond over a long period under high-strength and complex environments. Furthermore, the structural adhesive also exhibits good elasticity and tensile strength, effectively withstanding external mechanical stress and vibration.

[0060] See Figure 5 and Figure 7 As shown, according to some embodiments of the present invention, the fastening strap 320 includes a main body 321 and a second connecting portion 322 located at both ends of the main body 321. The main body 321 and the second connecting portion 322 are vertically connected, and the second connecting portion 322 is connected to the side wall of the lower housing 100. A first support member 120 is provided on the lower housing 100, and at least part of the end of the first support member 120 abuts against the main body 321 and the second connecting portion 322 to support the fastening strap 320.

[0061] By setting the fastening band 320 to include a main body 321 and a second connecting part 322 located on both sides of the main body 321, and by providing a first support member 120 on the lower housing 100 for supporting the main body 321 and the second connecting part 322, it is possible to ensure that the fastening band 320 enhances the ability of the lower housing 100 to resist the expansion and deformation of the battery cell 211, while also ensuring that the fastening band 320 has strong stability.

[0062] Specifically, multiple first support members 120 are welded to both ends of the lower housing 100 along the X direction to support the corresponding fastening bands 320. This design is simple in structure, easy to manufacture, and effectively supports the fastening bands 320. The second connecting part 322 has mounting holes through which it can be riveted to the side wall of the lower housing 100.

[0063] See Figure 5 As shown, according to some embodiments of the present invention, the end of the first support member 120 is fitted with the connection between the main body 321 and the second connecting part 322.

[0064] By fitting the end of the first support member 120 to the connection between the main body 321 and the second connecting part 322, the first support member 120 can provide more stable support for the fastening band 320.

[0065] Specifically, when the end of the first support member 120 is fitted with the connection between the main body 321 and the second connecting part 322, it can effectively prevent the fastening band 320 from shaking relative to the first support member 120 and ensure that the fastening band 320 maintains a stable position during operation.

[0066] As an example, in this embodiment, the fastening band 320 is formed by bending the two ends of a strip of metal, with the middle part being the main body 321 and the two ends being the second connecting parts 322. The connection between the main body 321 and the second connecting parts 322 is designed with rounded corners. Correspondingly, the end of the first support member 120 is provided with a matching arc surface to meet the fitting requirements.

[0067] See Figure 8 As shown, according to some embodiments of the present invention, the lower housing 100 includes a base plate 130, a frame 140, and a crossbeam 150. The base plate 130, the frame 140, and the crossbeam 150 together form at least one receiving groove 110. Along the X direction, the first end and the second end of the lower housing 100 are each provided with a second support member 160. The end of the second support member 160 abuts against the crossbeam 150 at the corresponding end to support the crossbeam 150 at the corresponding end.

[0068] By providing second support members 160 at both the first and second ends of the lower housing 100, and having the ends of the second support members 160 abut against the crossbeams 150 at the corresponding ends, the stability and rigidity of the lower housing 100 structure can be effectively enhanced.

[0069] Specifically, when the battery cell 211 expands in the X direction, it will exert a compressive force on the crossbeam 150 in the X direction. By setting the second support member 160, the crossbeam 150 can be supported and fixed, thereby improving the stability of the lower housing 100 structure.

[0070] Preferably, multiple second support members 160 are spaced apart along the Y direction to simultaneously support different positions of the crossbeam 150 along the Y direction, thereby improving the support and fixation effect.

[0071] See Figure 1 As shown, according to some embodiments of the present invention, the reinforcing component 300 is located above the busbar 220, and the projection of the reinforcing component 300 in the Z direction at least partially covers the busbar 220.

[0072] By placing the reinforcing component 300 above the busbar 220 and ensuring that the projection of the reinforcing component 300 in the Z direction at least partially covers the busbar 220, large-area exposure of the busbar 220 can be avoided, thus ensuring the electrical insulation safety of the battery pack.

[0073] Preferably, the projection of the reinforcing component 300 in the Z direction completely covers the busbar 220, which can provide insulation coverage for the entire busbar 220 and further ensure the electrical insulation safety of the battery pack.

[0074] Specifically, in this embodiment, the tensile plate 310, the fastening band 320, and the insulating pad 330 together cover the busbar 220. Along the X direction, the width of the tensile plate 310 is the same as the width of the busbar 220, the width of the insulating pad 330 is the same as the width of the recess 221, and the width of the fastening band 320 is the same as the width of the insulating pad 330.

[0075] According to some embodiments of the present invention, along the X direction, the ratio of the width of the tensile plate 310 to the length of the battery cell 211 is 0.08 to 0.35.

[0076] By setting the ratio of the width of the tensile plate 310 to the length of the battery cell 211 to 0.08 to 0.35, even if the width of the tensile plate 310 is within a reasonable range relative to the battery cell 211, the tensile plate 310 can be made strong enough to prevent it from being too wide and interfering with surrounding components. This also saves materials and reduces costs.

[0077] As an example, the ratio of the width of the tensile plate 310 to the length of the battery cell 211 can be 0.08, 0.1, 0.15, 0.5, or 0.35, etc.

[0078] According to some embodiments of this utility model, the thickness of the tensile plate 310 is greater than or equal to 2 mm.

[0079] By setting the thickness of the tensile plate 310 to be greater than or equal to 2mm, it can be ensured that it has sufficient strength to effectively resist the tensile force generated by the expansion of the battery cell 211 and prevent the tensile plate 310 from deforming or breaking during use.

[0080] See Figure 1 and Figure 2 and Figure 8 As shown, according to some embodiments of the present invention, along the X direction, the lower housing 100 is formed with a plurality of receiving slots 110, and each receiving slot 110 is provided with a plurality of battery modules 200 along the Y direction; the battery module 200 includes a plurality of cell units 210 arranged along the Y direction, and the cell unit 210 includes a plurality of cells 211 arranged along the X direction.

[0081] By forming multiple receiving slots 110 along the X direction in the lower housing 100, and arranging multiple battery modules 200 along the Y direction in each receiving slot 110, the overall density and space utilization of the battery pack can be effectively improved. This allows the battery modules 200 to be rationally arranged and laid out in both the longitudinal and lateral directions, thereby optimizing the volume and energy density of the battery pack.

[0082] See Figure 9 and Figure 10 As shown, specifically in this embodiment, along the X direction, the lower housing 100 forms two receiving slots 110, and each receiving slot 110 is provided with three battery modules 200 along the Y direction. In the battery module 200, the gap between the end cell 211 and the crossbeam 150 of the lower housing 100 is ≤4.5mm. Each battery module 200 includes two cell units 210 arranged along the Y direction, and each cell unit 210 includes nine cells 211.

[0083] A heat insulation plate 230 is provided between adjacent cell units 210, and end plates 240 are provided at both ends of the cell unit 210 along the X direction. When the battery module 200 is assembled, pressure is first applied in the Y direction to bond the cell 211 to the corresponding heat insulation plate 230, and then pressure is applied in the X direction to bond the end plate 240 to the cell 211. In the same cell unit 210, there is a gap between adjacent cells 211, and the ratio of the gap between adjacent cells 211 to the thickness of the cell 211 is 0.01 to 0.08. After the battery module 200 is placed in the receiving groove 110, the gap is filled by the filling pad 250, which can play a buffering role and can be compressed, deformed, and rebounded to ensure the assembly force of the battery module 200. This allows the individual module to enter the mounting groove under overpressure and ensures that it can return to its initial size after entering the mounting groove, so that the end plate 240 abuts against the crossbeam 150 of the lower housing 100.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A CTP power battery pack, characterized in that, include: The lower housing has at least one receiving groove formed therein; A battery module, comprising multiple battery cells and multiple busbars, with adjacent battery cells connected in series via the busbars, and at least one battery module disposed within the receiving slot; A reinforcing component includes a tensile plate and a fastening band. The tensile plate is connected to a plurality of busbars arranged along the X direction. The fastening band is arranged along the X direction. A first end of the fastening band is connected to a first end of the lower housing, and a second end of the fastening band is connected to a second end of the lower housing. A receiving groove is located between the first end and the second end of the fastening band.

2. The CTP power battery pack according to claim 1, characterized in that, The tensile plate is an insulating tensile plate; The reinforcing component also includes an insulating pad located between the fastening band and the busbar. The outer wall of the fastening band is fitted with an insulating layer, which is connected to the insulating pad.

3. The CTP power battery pack according to claim 2, characterized in that, The busbar includes a recess and a first connecting portion located on both sides of the recess. The first connecting portion is electrically connected to the terminal of the battery cell, and at least a portion of the insulating pad is located within the recess.

4. The CTP power battery pack according to claim 2, characterized in that, The insulating tensile plate is bonded to the busbar, and the insulating pad is bonded to the insulating layer.

5. The CTP power battery pack according to claim 1, characterized in that, The fastening band includes a main body and second connecting parts located at both ends of the main body. The main body is perpendicularly connected to the second connecting parts, and the second connecting parts are connected to the side wall of the lower housing. The lower housing is provided with a first support member, the end of which at least partially abuts against the main body and the second connecting part to support the fastening strap.

6. The CTP power battery pack according to claim 5, characterized in that, The end of the first support member is fitted with the connection between the main body and the second connecting part.

7. The CTP power battery pack according to claim 1, characterized in that, The lower housing includes a base plate, a frame, and a crossbeam, wherein the base plate, the frame, and the crossbeam together form at least one of the receiving grooves; Along the X direction, a second support member is provided at both the first and second ends of the lower housing. The end of the second support member abuts against the crossbeam at the corresponding end to support the crossbeam at the corresponding end.

8. The CTP power battery pack according to claim 1, characterized in that, The reinforcement component is located above the busbar, and the projection of the reinforcement component in the Z direction at least partially covers the busbar.

9. The CTP power battery pack according to claim 1, characterized in that, Along the X direction, the ratio of the width of the tensile plate to the length of the battery cell is 0.08 to 0.35; And / or, the thickness of the tensile plate is greater than or equal to 2 mm.

10. The CTP power battery pack according to claim 1, characterized in that, Along the X direction, the lower housing has a plurality of receiving slots, and each receiving slot has a plurality of battery modules arranged along the Y direction. The battery modules include a plurality of cell units arranged along the Y direction, and the cell units include a plurality of cells arranged along the X direction.

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