A large module structure

Abstract

The utility model discloses a big module structure, including battery pack, frame assembly and leading out piece, battery pack is provided with output pole, frame assembly has the installation cavity of accommodating battery pack suitable, and is used for supporting and fixed battery pack, leading out piece sets up in frame assembly height direction one end along frame assembly, and leading out piece is connected in frame assembly through the joint structure, and output pole is connected in leading out piece. The utility model makes the length size of big module structure on the basis of output pole erection fixed in leading out piece, and the volume of big module structure is reduced in battery box accordingly, and energy density is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, specifically to a large module structure. Background Technology

[0002] With social development and increasing emphasis on environmental protection, electric vehicles are being used more and more widely. The energy density requirements for power batteries used in electric vehicles are also rising. Against this backdrop, large-module technology has become an effective means to improve battery pack energy density. Large-module technology integrates multiple small modules into a large module to form a battery module structure, improving assembly efficiency and production cycle time.

[0003] A battery module structure typically includes a frame assembly and a battery pack. The frame assembly forms a mounting cavity for installing the battery pack and is used to support and fix the battery pack. To ensure the safety of the battery pack, the output terminals of the battery pack usually need to be connected to the lead-out components. In traditional battery module structures, the lead-out components are set on the outer side wall of the frame assembly along the length of the frame assembly, and then the output terminals of the battery pack are connected to the lead-out components. This results in a large length dimension of the traditional battery module structure, which is not conducive to improving energy density. Utility Model Content

[0004] Therefore, this utility model provides a large module structure to solve the problem that the existing battery module structure has a large length dimension, which is not conducive to improving energy density.

[0005] This utility model provides a large module structure, including: The battery pack is equipped with an output terminal. A frame assembly having a mounting cavity adapted to receive the battery pack and for supporting and securing the battery pack; A lead-out component is disposed at one end of the frame assembly along the height direction of the frame assembly, and the lead-out component is connected to the frame assembly via a snap-fit ​​structure; the output electrode is connected to the lead-out component.

[0006] According to the large module structure of this utility model, at least the following technical effects are achieved: By placing the lead-out component on the end face of the frame assembly along the height direction of the frame assembly, the length of the large module structure is reduced while fixing the output pole to the lead-out component. This reduces the volume occupied by the large module structure in the battery box and increases the energy density. At the same time, the lead-out component is fixedly connected to the frame assembly by a snap-fit ​​structure. Compared with the welding method, this helps to reduce stress concentration in the weld area and material embrittlement in the heat-affected zone due to high temperature. This ensures the structural strength of the frame assembly while reducing assembly difficulty.

[0007] In one alternative embodiment, the frame assembly includes two side plates and two end plates, with one end plate disposed between the same ends of the two side plates, and the two side plates and the two end plates forming the mounting cavity; the lead-out member is connected to one of the end plates, and the projection of the lead-out member along the length direction of the side plate falls within the range of the battery pack.

[0008] In one optional embodiment, the end plate connected to the lead-out member is designated as a first end plate, and the other end plate is designated as a second end plate; the snap-fit ​​structure includes: A snap-fit ​​boss is provided on the lead-out member; A snap-fit ​​groove is provided on the end face of the first end plate facing the lead-out member, and the snap-fit ​​groove is adapted to snap-fit ​​the snap-fit ​​boss. Alternatively, the snap-fit ​​structure includes: A snap-fit ​​boss is provided on the end face of the first end plate facing the lead-out member; A snap-fit ​​groove is provided on the end face of the lead-out member facing the first end plate, and the snap-fit ​​groove is adapted to snap-fit ​​the snap-fit ​​boss.

[0009] In one optional embodiment, the snap-fit ​​groove is recessed on the side opposite to the second end plate, and the first end plate is provided with a buckle hole on the side wall opposite to the second end plate, the buckle hole communicating with the sliding groove; the lead-out member is provided with an elastic arm corresponding to the position of the sliding groove, and the elastic arm is provided with a buckle protruding from the side wall opposite to the snap-fit ​​boss, the buckle matching the buckle hole.

[0010] In one optional embodiment, the end plate and the side plate are bolted together and fixed; the side plate is provided with a first threaded hole at both ends along the length direction of the side plate, and the first threaded hole matches the first bolt; the end plate is provided with a connector at both ends along the length direction of the end plate, and the connector is provided with a first through hole at the position corresponding to the first threaded hole, the first through hole being used for the shank of the first bolt to pass through.

[0011] In one optional embodiment, an insulating protective cover is snapped onto the end of the lead-out member facing the output electrode, and the insulating protective cover abuts against the end face of the output electrode opposite to the lead-out member. And / or, the lead-out member has an embedded nut on its end face facing the output pole, and the output pole has a second through hole corresponding to the position of the embedded nut. The second through hole is used for a second bolt to pass through, and the second bolt matches the embedded nut. And / or, the battery pack includes a CCS assembly and multiple rows of cell assemblies, the multiple rows of cell assemblies being stacked sequentially along the length direction of the end plate; each row of cell assemblies is provided with a heating film on both sides along the length direction of the end plate; the CCS assembly is disposed at one end of the multiple rows of cell assemblies along the height direction of the frame assembly, the CCS assembly is used to connect the circuits between the multiple rows of cell assemblies, and the output terminal is disposed on the CCS assembly and located on one side of the CCS assembly along the length direction of the side plate.

[0012] In one optional embodiment, the lead-out member has a locking block protruding from one end sidewall facing the insulating protective cover, and the insulating protective cover has an elastic part corresponding to the position of the locking block. The elastic part has a locking hole on one end sidewall facing the locking block, and the locking hole matches the locking block.

[0013] In one optional embodiment, a first insulating plate is provided between the battery pack and the end plate; And / or, a second insulating plate is provided between the heating film and the side plate; And / or, the battery cell assembly includes a plurality of battery cells, which are stacked sequentially along the length of the side plate, with spacers provided between adjacent battery cells; And / or, the end face of the CCS assembly facing away from the cell assembly is provided with a third insulating plate, and the third insulating plate is provided with a plurality of foam strips spaced apart from the end face of the CCS assembly; And / or, foam is attached to the side of the heating film that is relatively close to the side plate facing the corresponding side plate.

[0014] In one optional embodiment, the cross-section of the end plate perpendicular to the length direction of the end plate is set as a rectangle, and at least one reinforcing rib is provided within the rectangle.

[0015] In one optional embodiment, lifting holes are provided on the opposite sides of the two end plates; And / or, a strip fixing hole is provided through the first end plate along the length direction of the side plate; And / or, a wire harness fixing bracket is provided on the side of the first end plate opposite to the second end plate; And / or, the end plate is provided with a module fixing hole at one end along the height direction of the frame assembly. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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.

[0017] Figure 1 This is a three-dimensional structural diagram of a large module structure according to this embodiment; Figure 2 This is an exploded view of a large module structure according to this embodiment; Figure 3 This is a partial structural diagram of a large module structure according to this embodiment; Figure 4 This is a schematic diagram of the lead-out component in a large module structure according to this embodiment; Figure 5 This is a three-dimensional structural diagram of an insulating protective cover plate in a large module structure according to this embodiment; Figure 6 for Figure 5 A schematic diagram of the side view structure; Figure 7 This is a schematic diagram of the structure of the first end plate in a large module structure according to this embodiment; Figure 8 for Figure 7 Enlarged view of point A in the middle; Figure 9 for Figure 7 A cross-sectional schematic diagram; Figure 10 This is a schematic diagram of the side plate in a large module structure of this embodiment.

[0018] Explanation of reference numerals in the attached figures: 110-CCS assembly, 111-output electrode, 112-second through hole, 120-cell assembly, 121-cell, 122-spacer, 130-heating film, 140-first insulating plate, 150-second insulating plate, 160-third insulating plate, 161-foam strip; 200-lead-out part, 210-embedded nut, 220-block, 221-second guide slope, 230-clamping groove; 310-Side plate, 311-First threaded hole, 320-First end plate, 321-Lifting hole, 322-Strip fixing hole, 323-Wire harness fixing bracket, 324-Module fixing hole, 325-Outlet hole, 326-Reinforcing rib, 330-Second end plate, 340-First bolt, 350-Connector, 351-First through hole, 352-Embedding groove; 410-Snap-fit ​​boss, 420-Snap-fit ​​groove, 421-Sliding groove, 422-Snap-fit ​​hole, 430-Elastic arm, 440-Snap-fit, 441-First guide slope; 500-Insulating protective cover plate, 510-Support foot, 520-Elastic part, 521-Clamping hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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.

[0020] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment 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 this embodiment. 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.

[0021] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0022] The following is combined with Figures 1 to 10 The following describes embodiments of the present invention.

[0023] like Figures 1 to 3As shown, a large module structure according to an embodiment of the present invention includes a battery pack, a frame assembly, and a lead-out member 200. The battery pack is provided with an output terminal 111. The frame assembly has a mounting cavity suitable for accommodating the battery pack and is used to support and fix the battery pack. The lead-out member 200 is disposed at one end of the frame assembly along the height direction of the frame assembly, and the lead-out member 200 is connected to the frame assembly by a snap-fit ​​structure. The output terminal 111 is connected to the lead-out member 200.

[0024] In this embodiment, the large module structure reduces the length of the large module structure by placing the lead-out piece 200 on the end face of the frame assembly along the height direction of the frame assembly, while fixing the output pole 111 to the lead-out piece 200. This reduces the volume occupied by the large module structure in the battery box and increases the energy density. At the same time, the lead-out piece 200 is fixedly connected to the frame assembly by a snap-fit ​​structure. Compared with the welding method, this helps to reduce stress concentration in the weld area and material embrittlement in the heat-affected zone due to high temperature, thus ensuring the structural strength of the frame assembly while reducing assembly difficulty.

[0025] It should be noted that the large module structure of this embodiment is applied to a power battery. In the process of assembling the large module structure of this embodiment into a power battery, the large module structure of this embodiment needs to be installed in the battery box. The battery box includes an upper cover and a lower cover; that is, several large module structures of this embodiment are installed in the lower cover of the battery box, and then the upper cover is installed on the lower cover.

[0026] It is understood that the height direction of the frame component, the length direction of the end plate, and the length direction of the side plate 310 mentioned in the text are all perpendicular to each other; for ease of description, this embodiment uses... Figure 1 The first direction, the second direction, and the third direction are described as the height direction of the frame component, the length direction of the end plate, and the length direction of the side plate 310, respectively. However, they should not be construed as explicitly defining the height direction of the frame component, the length direction of the end plate, and the length direction of the side plate 310.

[0027] like Figure 1 and Figure 2As shown, in some embodiments, the frame assembly includes two side plates 310 and two end plates, with an end plate disposed between the same ends of the two side plates 310. The two side plates 310 and the two end plates form the mounting cavity. The lead-out member 200 is connected to one of the end plates, and the projection of the lead-out member 200 along the length direction of the side plate 310 falls within the range of the battery pack. By placing the projection of the lead-out member 200 along the length direction of the side plate 310 within the range of the battery pack, after the lead-out member 200 is disposed on the end face of the frame assembly along the height direction of the frame assembly, the lead-out member 200 will not protrude outside the battery pack along the height direction of the frame assembly. This achieves the goal of reducing the length dimension of the large module structure in this embodiment without increasing the height dimension of the large module structure, thereby helping to reduce the volume occupied by the large module structure in the battery box and improve the energy density.

[0028] It should be noted that the battery pack has a positive output terminal and a negative output terminal. The positive output terminal 111 and the negative output terminal are located on the same side of the battery pack along the length of the side plate 310, that is, the battery pack has two output terminals 111. Correspondingly, two lead-out parts 200 are provided on the same end plate.

[0029] Specifically, one of the end plates connected to the lead-out member 200 is designated as a first end plate 320, and the other end plate is designated as a second end plate 330.

[0030] The specific structure of the snap-fit ​​structure in this embodiment will be described in detail below.

[0031] like Figure 4 , Figure 7 and Figure 8 As shown, in some embodiments, the snap-fit ​​structure includes a snap-fit ​​boss 410 and a snap-fit ​​groove 420. The snap-fit ​​boss 410 is disposed on the end face of the lead-out member 200 facing the first end plate 320; the snap-fit ​​groove 420 is disposed on the end face of the first end plate 320 facing the lead-out member 200, and the snap-fit ​​groove 420 is adapted to snap-fit ​​the snap-fit ​​boss 410. During the assembly of the lead-out member 200 to the frame assembly, it is only necessary to align the snap-fit ​​boss 410 with the snap-fit ​​groove 420 and insert it to complete the assembly of the lead-out member 200 and the frame assembly, making the assembly relatively simple.

[0032] In specific applications, the cross-sectional profile of the snap-fit ​​boss 410 perpendicular to the height direction of the frame assembly is set to be non-circular. For example, the cross-sectional profile of the snap-fit ​​boss 410 is set to a polygon such as a rectangle, pentagon, or hexagon.

[0033] Specifically, the snap-fit ​​groove 420 has a recessed sliding groove 421 on the side opposite to the second end plate 330, and the first end plate 320 has a buckle hole 422 on the side wall opposite to the second end plate 330, which communicates with the sliding groove 421; the lead-out member 200 has an elastic arm 430 at the position corresponding to the sliding groove 421, and the elastic arm 430 has a buckle 440 protruding from the side wall opposite to the snap-fit ​​boss 410, which matches the buckle hole 422. Because there is a gap between the elastic arm 430 and the snap-fit ​​boss 410 in their natural state along the length of the side plate 310, during the process of aligning the elastic arm 430 with the sliding groove 421, after the snap-fit ​​440 abuts against the wall of the sliding groove 421, the snap-fit ​​440 moves closer to the snap-fit ​​boss 410 along with the elastic arm 430 under the squeezing force of the wall of the sliding groove 421. Then, after the elastic arm 430 is inserted to a set depth so that the snap-fit ​​440 aligns with the snap-fit ​​hole 422, the squeezing force applied to the snap-fit ​​block 220 by the wall of the sliding groove 421 disappears, and the elastic arm 430 elastically resets so that the snap-fit ​​440 is embedded in the snap-fit ​​hole 422 to complete the secondary snap-fit. This ensures the tightness of the connection between the lead-out member 200 and the first end plate 320, and also restricts the degree of freedom of the lead-out member 200 to rotate circumferentially relative to the first end plate 320.

[0034] It should be noted that the elastic arm 430 in its natural state refers to the elastic arm 430 that has not undergone elastic deformation.

[0035] It is understandable that by setting the buckle hole 422 on the outer surface of the first end plate 320 (i.e. the side opposite to the battery pack), an external force is applied to disengage the buckle 440 from the buckle hole 422, thereby facilitating disassembly.

[0036] like Figure 3 and Figure 4 As shown, specifically, the side wall of the buckle 440 facing away from the elastic arm 430 is configured as a first guide slope 441. The first guide slope 441 extends from the bottom end to the top end of the buckle 440 along the height direction of the frame assembly. The first guide slope 441 is inclined away from the center line of the buckle 440. This allows the operator to apply only a small amount of downward pressure so that the elastic arm 430 can cross the buckle 440 along the first guide slope 441, thus enabling the buckle 440 to be inserted into the buckle hole 422 to complete the secondary fastening. It can be understood that the bottom end of the buckle 440 refers to the end of the buckle 440 facing the first end plate 320, and the top end of the buckle 440 refers to the end of the buckle 440 facing away from the first end plate 320.

[0037] In another alternative embodiment, the snap-fit ​​structure includes a snap-fit ​​boss 410 and a snap-fit ​​groove 420. The snap-fit ​​boss 410 is disposed on the end face of the first end plate 320 facing the lead-out member 200; the snap-fit ​​groove 420 is disposed on the end face of the lead-out member 200 facing the first end plate 320, and the snap-fit ​​groove 420 is adapted to snap-fit ​​with the snap-fit ​​boss 410.

[0038] Specifically, the snap-fit ​​groove 420 has a recessed sliding groove 421 on the side opposite to the second end plate 330, and the first end plate 320 has a buckle hole 422 on the side wall opposite to the second end plate 330, which communicates with the sliding groove 421; the first end plate 320 has an elastic arm 430 at the position corresponding to the sliding groove 421, and the elastic arm 430 has a buckle 440 protruding from the side wall opposite to the snap-fit ​​boss 410, which matches the buckle hole 422.

[0039] In some embodiments, the end plate and the side plate 310 are bolted together by a first bolt 340. Compared to welding the end plate and the side plate 310 to form a frame assembly, the weld area is prone to stress concentration and the heat-affected zone may become brittle due to high temperature, making the connection between the end plate and the side plate 310 weak and prone to cracking due to vibration or impact, thus resulting in poor structural strength of the frame assembly. In this embodiment, the end plate and the side plate 310 are bolted together by the first bolt 340, which makes the connection between the end plate and the side plate 310 have high strength and is easy to operate, thereby ensuring the structural strength of the entire frame assembly. This can reduce the risk of short circuit caused by deformation of the large module structure in this embodiment due to collision, thus improving the safety of the large module structure in this embodiment. It can also effectively restrain the expansion of the cells 121 in the battery pack.

[0040] like Figure 1 , Figure 2 , Figure 7 and Figure 10 As shown, specifically, the side plate 310 has first threaded holes 311 at both ends along its length, and these first threaded holes 311 are matched with the first bolts 340. The end plate has connectors 350 at both ends along its length, and each connector 350 has a first through hole 351 corresponding to the position of the first threaded hole 311. The first through hole 351 is used for the shank of the first bolt 340 to pass through. When assembling the frame assembly, firstly, the first through hole 351 is aligned with the first threaded hole 311, and then the shank of the first bolt 340 is passed through the first through hole 351 and screwed into the first threaded hole 311 to complete the bolting. The entire process is simple to operate.

[0041] like Figure 7As shown, specifically, a recessed groove 352 is provided on the opposite side of the end plates to conceal the screw head of the first bolt 340 within the recessed groove 352, preventing the screw head of the first bolt 340 from protruding from the outer surface of the end plate and scratching assembly personnel. It should be noted that the outer surface of the end plate refers to the side of the end plate opposite to the battery pack.

[0042] In practical applications, both the end plates and side plates 310 are made of extruded aluminum profiles, which gives the frame components higher tensile strength and torsional stiffness, ensuring the strength and stability of the large module structure in this embodiment.

[0043] like Figures 1 to 3 As shown, in some embodiments, an insulating protective cover plate 500 is snapped onto the end of the lead-out member 200 facing the output electrode 111. The insulating protective cover plate 500 abuts against the end face of the output electrode 111 away from the lead-out member 200. On the one hand, the insulating protective cover plate 500 helps to press the output electrode 111 tightly and fit it onto the lead-out member 200, ensuring the safety of the battery pack. On the other hand, it plays a role in high-voltage insulation protection.

[0044] Specifically, the projection of the insulating protective cover 500 along the length of the side plate 310 falls within the range of the battery pack.

[0045] like Figures 3 to 5 As shown, specifically, the lead-out member 200 has a locking block 220 protruding from one end sidewall facing the insulating protective cover plate 500, and the insulating protective cover plate 500 has an elastic part 520 corresponding to the position of the locking block 220. The elastic part 520 has a locking hole 521 on one end sidewall facing the locking block 220, and the locking hole 521 matches the locking block 220. During assembly, the output terminal 111 is first attached to the end face of the lead-out member 200 facing the insulating protective cover plate 500. Then, the elastic part 520 is pressed down towards the lead-out member 200. After the elastic part 520 abuts against the locking block 220, the elastic part 520 moves away from the insulating protective cover plate 500 under the squeezing force applied by the locking block 220. After being pressed down to the position where the locking hole 521 is aligned with the locking block 220, the squeezing force applied to the elastic part 520 disappears, and the elastic part 520 elastically resets, allowing the locking block 220 to be inserted into the locking hole 521 to complete the fastening. The entire assembly process is convenient to operate.

[0046] like Figure 4 and Figure 6As shown, specifically, the side wall of the locking block 220 facing away from the lead-out member 200 is configured as a second guide slope 221. The second guide slope 221 extends from the top end of the locking block 220 to the bottom end along the height direction of the frame assembly, and is inclined away from the center line of the lead-out member 200. The elastic part 520 extends gradually closer to the lead-out member 200 along the height direction of the frame assembly, and is inclined away from the center line of the insulating protective cover plate 500. This makes it easier to assemble the device by pressing the elastic part 520 down towards the lead-out member 200. It can be understood that the top end of the locking block 220 refers to the end of the locking block 220 facing the insulating protective cover plate 500, and the bottom end of the locking block 220 refers to the end of the locking block 220 facing away from the insulating protective cover plate 500.

[0047] In specific applications, one, two, or three equal numbers of locking blocks 220 can be provided on both sides of the lead-out member 200 along the length direction of the side plate 310; or one, two, or three equal numbers of locking blocks 220 can be provided on both sides of the lead-out member 200 along the length direction of the end plate.

[0048] like Figure 3 , Figure 5 and Figure 6 As shown, specifically, the insulating protective cover plate 500 has protruding support feet 510 at the four corners of the end facing the output electrode 111. The support feet 510 abut against the end face of the output electrode 111 away from the lead-out member 200. By having the four support feet 510 abut against the four corners of the output electrode 111 respectively, it is beneficial to press the output electrode 111 tightly against the lead-out member 200. At the same time that the support feet 510 abut against the output electrode 111, the locking block 220 is also inserted into the locking hole 521.

[0049] like Figure 3 and Figure 4 As shown, specifically, the lead-out member 200 has an embedded nut 210 on its end face facing the output electrode 111. The output electrode 111 has a second through hole 112 corresponding to the position of the embedded nut 210. The second through hole 112 is used for a second bolt to pass through, and the second bolt matches the embedded nut 210. Because the lead-out member 200 will not rotate relative to the first end plate 320 after being connected to the first end plate 320 by a snap-fit ​​structure, after the output electrode 111 is attached to the lead-out member 200 and the second through hole 112 is aligned with the embedded nut 210, the shank of the second bolt can be passed through the second through hole 112 and tightened onto the embedded nut 210, so that the head of the second bolt abuts against the output electrode 111, thereby achieving bolted fixation of the output electrode 111 and the lead-out member 200, ensuring that the output electrode 111 is tightly pressed and attached to the lead-out member 200.

[0050] like Figure 3 As shown, it can be understood that the screw head of the second bolt is located in the space enclosed by the four support feet 510, that is, the screw head of the second bolt does not affect the abutting of the insulating protection cover plate 500 against the output electrode 111. Meanwhile, through the cooperation of the second bolt and the four support feet 510, after the second bolt is tightened, the four raised corners of the output electrode 111 are pressed down by the four support feet 510, which is conducive to tightly pressing and attaching the output electrode 111 to the lead-out member 200.

[0051] As Figure 4 shown, specifically, two clamping grooves 230 are concavely provided on the end face of the lead-out member 200 facing the output electrode 111, and the two clamping grooves 230 are oppositely arranged on both sides of the embedded nut 210 along the length direction of the end plate; the two clamping grooves 230 are used for clamping by a clip during EOL testing of the module.

[0052] As Figure 9 shown, in some embodiments, the cross-section of the end plate perpendicular to the length direction of the end plate is configured as a rectangle, and at least one reinforcing rib 326 is arranged in the rectangle, preferably seven reinforcing ribs 326 are provided herein, so that the cross-section of the end plate perpendicular to the length direction of the end plate forms a structure similar to a Chinese character "目", which strengthens the structure of the end plate itself, so that the end plate can withstand the expansion force of the battery cell 121 without deformation, and meanwhile achieves the effects of weight reduction and opening on the outer surface for fixing and mounting other components.

[0053] As Figure 2 , Figure 7 and Figure 8 shown, specifically, hoisting holes 321 are respectively provided on the sides of the two end plates facing away from each other; since the structure of the end plate is strengthened, and the hoisting holes 321 are provided on the end plate, during hoisting of the large module structure according to the present embodiment, the end plate can bear most of the moment, reducing the occurrence of failure during hoisting of the large module structure according to the present embodiment.

[0054] In specific applications, each end plate may be provided with one, two, three or other numbers of hoisting holes 321.

[0055] As Figure 8 shown, specifically, a binding strap fixing hole 322 is penetratingly provided on the first end plate 320 along the length direction of the side plate 310; utilizing the characteristic that the structure of the first end plate 320 is strengthened, by providing the binding strap fixing hole 322 on the first end plate 320, it is convenient for a fir-shaped binding strap to pass through the binding strap fixing hole 322 to fix the low-voltage wire harness inside the battery pack.

[0056] As Figure 1 and Figure 8As shown, specifically, a wire harness fixing bracket 323 is provided on the side of the first end plate 320 opposite to the second end plate 330; by taking advantage of the reinforced structure of the first end plate 320, the wire harness fixing bracket 323 is provided on the first end plate 320, thereby facilitating the fixing of the wire harness.

[0057] like Figure 2 and Figure 7 As shown, specifically, one end of the end plate along the height direction of the frame assembly is provided with a module fixing hole 324; by utilizing the reinforced characteristics of the end plate structure, the module fixing hole 324 is provided on the end plate, thereby facilitating the installation and fixing of the large module structure of this embodiment into the battery box.

[0058] like Figure 2 and Figure 3 As shown, in some embodiments, the battery pack includes a CCS assembly 110 and multiple rows of cell assemblies 120. In this embodiment, three rows of cell assemblies 120 are preferably stacked sequentially along the length of the end plate. Each row of cell assemblies 120 is provided with a heating film 130 on both sides along the length of the end plate. The CCS assembly 110 is disposed at one end of the multiple rows of cell assemblies 120 along the height of the frame assembly. The CCS assembly 110 is used to connect the circuits between the multiple rows of cell assemblies 120. The output terminal 111 is disposed on the CCS assembly 110 and located on one side of the CCS assembly 110 along the length of the side plate 310. This embodiment arranges three rows of battery cell assemblies 120 into a battery pack, and then assembles the battery pack into a frame assembly to form a battery module. Compared with arranging three single-row battery cells 121 into a battery pack and then assembling it into a frame assembly, this embodiment reduces the width of the space occupied by the large module structure installed in the battery box, which is beneficial to improving energy density. On the other hand, the large module structure of this embodiment also improves the efficiency of box assembly, increases production cycle, and reduces external high-voltage connections, thus reducing costs. At the same time, by providing a heating film 130 on both sides of each row of battery cell assemblies 120 along the length of the end plate, the heating effect of the battery cell assembly 120 is improved.

[0059] It should be noted that CCS component 110 refers to the cell connection system, also known as integrated busbar or wire harness board integration.

[0060] In specific applications, the number of cell assemblies 120 can be reasonably increased or decreased according to the power capacity of a single large module structure in this embodiment. For example, in other embodiments, the battery pack may include two, four, or five rows of other cell assemblies 120.

[0061] like Figure 1 , Figure 2 and Figure 7 As shown, specifically, the heating film 130 located between two adjacent rows of battery cell assemblies 120 is set as the first heating film, and the first end plate 320 is provided with a wire outlet hole 325 through the first heating film 130. The wire outlet hole 325 is used for the line wire connection of the first heating film.

[0062] like Figure 1 and Figure 2 As shown, specifically, a first insulating plate 140 is provided between the battery pack and the end plate to provide insulation.

[0063] like Figure 1 and Figure 2 As shown, specifically, a second insulating plate 150 is provided between the heating film 130 and the side plate 310 to provide insulation.

[0064] like Figure 2 As shown, specifically, the battery cell assembly 120 includes a plurality of battery cells 121, preferably sixteen in this embodiment. The sixteen battery cells 121 are stacked sequentially along the length direction of the side plate 310, and a spacer 122 is provided between two adjacent battery cells 121. The spacer 122 is used to reserve expansion space for the battery cells 121 to increase the life of the battery cells 121.

[0065] In specific applications, the number of cells 121 in each cell assembly 120 may be increased or decreased reasonably according to the actual process requirements. For example, in other embodiments, each cell assembly 120 may include eight, nine, ten or eleven cells 121 or other numbers.

[0066] like Figure 1 and Figure 2 As shown, specifically, a third insulating plate 160 is provided on the end face of the CCS component 110 facing away from the cell component 120, and a plurality of foam strips 161 are spaced apart on the end face of the third insulating plate 160 facing away from the CCS component 110. During the process of installing the large module structure of this embodiment inside the lower cover of the battery box, and then installing the upper cover of the battery box onto the upper part of the large module structure of this embodiment, the dispersed foam strips 161 can support the upper cover, improve its shape, and provide insulation protection.

[0067] In specific applications, ten foam strips 161 are provided, four of which are respectively provided at the four corners of the third insulating plate 160, and the other six are provided in the middle of the third insulating plate 160.

[0068] Specifically, the heating film 130 that is relatively close to the side plate 310 is covered with foam on the side facing the corresponding side plate 310 to avoid external scratches and damage.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A large module structure, characterized in that, include: The battery pack is equipped with an output terminal (111). A frame assembly having a mounting cavity adapted to receive the battery pack and for supporting and securing the battery pack; A lead-out member (200) is disposed at one end of the frame assembly along the height direction of the frame assembly, and the lead-out member (200) is connected to the frame assembly by a snap-fit ​​structure; the output pole (111) is connected to the lead-out member (200).

2. The large module structure according to claim 1, characterized in that, The frame assembly includes two side plates (310) and two end plates, with one end plate disposed between the same end of the two side plates (310), and the two side plates (310) and the two end plates forming the mounting cavity; the lead-out member (200) is connected to one of the end plates, and the projection of the lead-out member (200) along the length direction of the side plate (310) falls within the range of the battery pack.

3. The large module structure according to claim 2, characterized in that, The end plate connected to the lead-out member (200) is designated as the first end plate (320), and the other end plate is designated as the second end plate (330); the snap-fit ​​structure includes: A snap-fit ​​boss (410) is provided on the lead-out member (200); A snap-fit ​​groove (420) is provided on the end face of the first end plate (320) facing the lead-out member (200), and the snap-fit ​​groove (420) is adapted to snap-fit ​​the snap-fit ​​boss (410); Alternatively, the snap-fit ​​structure includes: A snap-fit ​​boss (410) is provided on the end face of the first end plate (320) facing the lead-out member (200); A snap-fit ​​groove (420) is provided on the end face of the lead-out member (200) facing the first end plate (320), and the snap-fit ​​groove (420) is adapted to snap-fit ​​the snap-fit ​​boss (410).

4. A large module structure according to claim 3, characterized in that, The snap-fit ​​groove (420) is recessed with a sliding groove (421) on the side opposite to the second end plate (330). The first end plate (320) is provided with a buckle hole (422) on the side wall opposite to the second end plate (330). The buckle hole (422) communicates with the sliding groove (421). The lead-out member (200) is provided with an elastic arm (430) at the position corresponding to the sliding groove (421). The elastic arm (430) is provided with a buckle (440) on the side wall opposite to the snap-fit ​​boss (410). The buckle (440) matches the buckle hole (422).

5. A large module structure according to claim 2, characterized in that, The end plate and the side plate (310) are bolted together and fixed by a first bolt (340); the side plate (310) is provided with a first threaded hole (311) at both ends along the length direction of the side plate (310), and the first threaded hole (311) matches the first bolt (340); the end plate is provided with a connector (350) at both ends along the length direction of the end plate, and the connector (350) is provided with a first through hole (351) at the position corresponding to the first threaded hole (311), and the first through hole (351) is used for the shank of the first bolt (340) to pass through.

6. A large module structure according to any one of claims 2 to 5, characterized in that, An insulating protective cover plate (500) is snapped onto one end of the lead-out member (200) facing the output electrode (111), and the insulating protective cover plate (500) abuts against the end face of the output electrode (111) away from the lead-out member (200); And / or, the lead-out member (200) is provided with an embedded nut (210) on the end face facing the output pole (111), and the output pole (111) is provided with a second through hole (112) corresponding to the position of the embedded nut (210). The second through hole (112) is used for a second bolt to pass through, and the second bolt is matched with the embedded nut (210). And / or, the battery pack includes a CCS assembly (110) and multiple rows of cell assemblies (120), the multiple rows of cell assemblies (120) being stacked sequentially along the length direction of the end plate; each row of cell assemblies (120) is provided with a heating film (130) on both sides along the length direction of the end plate; the CCS assembly (110) is disposed at one end of the multiple rows of cell assemblies (120) along the height direction of the frame assembly, the CCS assembly (110) is used to connect the circuits between the multiple rows of cell assemblies (120), the output terminal (111) is disposed on the CCS assembly (110) and located on one side of the CCS assembly (110) along the length direction of the side plate (310).

7. A large module structure according to claim 6, characterized in that, The lead-out member (200) has a locking block (220) protruding from one end sidewall facing the insulating protective cover (500). The insulating protective cover (500) has an elastic part (520) corresponding to the locking block (220). The elastic part (520) has a locking hole (521) on one end sidewall facing the locking block (220). The locking hole (521) matches the locking block (220).

8. A large module structure according to claim 6, characterized in that, A first insulating plate (140) is provided between the battery pack and the end plate. And / or, a second insulating plate (150) is provided between the heating film (130) and the side plate (310). And / or, the battery cell assembly (120) includes a plurality of battery cells (121), the plurality of battery cells (121) are stacked sequentially along the length direction of the side plate (310), and a spacer (122) is provided between two adjacent battery cells (121). And / or, the end face of the CCS assembly (110) opposite to the cell assembly (120) is provided with a third insulating plate (160), and the end face of the third insulating plate (160) opposite to the CCS assembly (110) is provided with a plurality of foam strips (161) at intervals. And / or, the heating film (130) relatively close to the side plate (310) is covered with foam on the side facing the corresponding side plate (310).

9. A large module structure according to claim 3 or 4, characterized in that, The cross-section of the end plate perpendicular to the length direction of the end plate is set as a rectangle, and at least one reinforcing rib (326) is provided in the rectangle.

10. A large module structure according to claim 9, characterized in that, The two end plates are provided with lifting holes (321) on opposite sides. And / or, the first end plate (320) is provided with a strip fixing hole (322) through the length direction of the side plate (310). And / or, a wire harness fixing bracket (323) is provided on the side of the first end plate (320) opposite to the second end plate (330). And / or, the end plate is provided with a module fixing hole (324) at one end along the height direction of the frame assembly.

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