Battery pack module with adaptive length

Abstract

The utility model discloses a length can self -adaptation regulation's battery pack module, including insulating cover, pack module, adjustable structure, base and BMS, the pack module sets up on the base, one end of pack module is with base fixed connection, and the other end is with adjustable structure fixed connection, the adjustable structure is away from one end of pack module with base connection, the insulating cover covers in the top of pack module, and both ends of insulating cover are with pack module fixed connection respectively, BMS is fixed on the end face of one end of pack module, through this application can realize elastic adjustment base fixed position, pack module both ends step -by -step fixed mechanism, can adapt to the manufacturing tolerance of different batches of battery cell, effectively improves the yield of module, and the utilization of material is high, has better tolerance compatibility and better cost benefit.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to a battery pack module with adaptively adjustable length. Background Technology

[0002] Currently, battery pack modules mainly use rigid end plates to fix the stacked structure of battery cells, supplemented by insulating fillers and metal restraint bands to achieve physical constraints. Common battery pack module fixing structures include the following types: (1) Fixed module structure: The battery cells are stacked in series and parallel and then the two ends are directly fixed to the base by bolts or welding. The module size is determined by the total thickness of the battery cells and cannot be dynamically adjusted. (2) Elastic compensation structure: Some use elastic components to compensate for small dimensional tolerances, but can only cope with millimeter-level deviations. (3) Modular frame structure: The battery cells are separated by prefabricated frames, but this increases weight and manufacturing costs, and the thermal management efficiency is limited.

[0003] Furthermore, due to the cumulative effect of tolerances, the more cells connected in series and parallel in the cell stacking structure, the greater the cumulative deviation. For example, when the thickness tolerance of a single cell is ±0.5mm, the total thickness deviation after stacking 8 cells can reach ±4mm. Moreover, the need for grading and screening cell thickness increases material management costs, leading to significant yield losses. After stacking, dimensional control of the module length is required, further increasing labor costs. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a battery pack module with adaptively adjustable length, which aims to solve the problems of traditional battery pack modules having fixed structures whose dimensions cannot be dynamically adjusted, lack of flexible compensation mechanisms, poor thermal management efficiency, and high material and labor costs.

[0005] To achieve the above objectives, the present invention proposes the following technical solution: a battery pack module with adaptively adjustable length, comprising an insulating cover, a pack module, an adjustable structure, a base, and a BMS; the pack module is disposed on the base; one end of the pack module is fixedly connected to the base, and the other end is fixedly connected to the adjustable structure; the end of the adjustable structure away from the pack module is connected to the base; the insulating cover covers the top of the pack module, and both ends of the insulating cover are fixedly connected to the pack module; the BMS is fixed to the end face of one end of the pack module.

[0006] In a preferred embodiment, the adjustable structure includes a first fixing bar and a second fixing bar arranged vertically; the first fixing bar is fixedly connected to the Pack module, and the second fixing bar is adjustablely connected to the base.

[0007] In a preferred embodiment, the second fixing strip is provided with several strip-shaped holes, which are arranged parallel to each other; the second fixing strip is adjustablely connected to the base through the strip-shaped holes.

[0008] In a preferred embodiment, the strip-shaped hole extends along the long side parallel to the base; the length of the strip-shaped hole is less than the width of the second fixing strip.

[0009] In a preferred embodiment, the first fixing strip, the second fixing strip, and the strip-shaped hole are integrally formed.

[0010] In a preferred embodiment, the Pack module includes a first end plate, a cell body, and a second end plate; one end of the cell body is abutted against the first end plate, and the other end is abutted against the second end plate; the top of the first end plate is fixedly connected to one end of the insulating cover, and the bottom of the first end plate is fixedly connected to the first fixing strip; the top of the second end plate is fixedly connected to the other end of the insulating cover, and the bottom of the second end plate is fixedly connected to the end of the base plate away from the first fixing strip.

[0011] In a preferred embodiment, the Pack module further includes a first strap and a second strap that surround the Pack module, the first strap being disposed near the insulating cover and the second strap being disposed near the base plate.

[0012] In a preferred embodiment, the first end plate is provided with a first groove adapted to the first strapping, and the second end plate is provided with a second groove adapted to the first strapping. The first groove and the second groove are opposite to and parallel to each other. One end of the first strapping is engaged in the first groove, and the other end is engaged in the second groove.

[0013] In a preferred embodiment, the first end plate is provided with a third groove adapted to the second strapping, and the second end plate is provided with a fourth groove adapted to the second strapping. The third groove and the fourth groove are opposite to and parallel to each other. One end of the second strapping is engaged in the third groove, and the other end is engaged in the fourth groove.

[0014] In a preferred embodiment, the BMS is disposed on the side of the first end plate away from the cell body, and the BMS is disposed between the first groove and the third groove.

[0015] In a preferred embodiment, from the first end plate to the second end plate, the cell body includes several cell units stacked parallel to each other, and adjacent cell units are connected in series or in parallel via a busbar; the busbar is located close to the insulating cover.

[0016] In a preferred embodiment, an insulating sheet is provided between adjacent battery cells, and the insulating sheet abuts against the battery cell; an insulating ring is provided on the base, and the insulating ring abuts against the base and the battery cell respectively.

[0017] In a preferred embodiment, the base has a base cutout adapted to the insulating ring; the base cutout is integrally formed with the base. By providing the base cutout and the insulating ring, the thermal management efficiency of the module can be effectively improved, which is beneficial to the effective heat dissipation of the module.

[0018] Compared with existing technologies, the technical solution of this utility model has the following advantages: This application connects the Pack module and the base through an adjustable structure, enabling flexible adjustment of the base's fixed position and a step-by-step fixing mechanism for both ends of the Pack module. This allows one end of the Pack module to be rigidly fixed to one end of the base via bolts, while the other end of the Pack module can slide axially through the adjustment structure and then be locked again. This structure can adapt to the manufacturing tolerances of different batches of battery cells, effectively improving the module's yield and exhibiting good tolerance compatibility. Furthermore, this structure eliminates the cell thickness screening process, effectively improving material utilization and offering good cost-effectiveness. It effectively solves problems such as the inability to dynamically adjust the dimensions of traditional battery pack module fixing structures, lack of flexible compensation mechanisms, poor thermal management efficiency, and high material and labor costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of a battery pack module with adaptively adjustable length according to an embodiment of the present invention.

[0021] Figure 2 for Figure 1 A schematic diagram of the exploded structure of a battery pack module with adaptively adjustable length;

[0022] Figure 3 for Figure 2 A schematic diagram of the adjustable structure and the base. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by this utility model. Parameters involving numerical ranges can be implemented as long as they are within the range claimed by this application.

[0025] Specifically, such as Figures 1 to 3 As shown, the present invention proposes the following technical solution: a battery pack module with adaptively adjustable length, including an insulating cover 10, a pack module 20, an adjustable structure 30, a base 40, and a BMS 50; the pack module 20 is disposed on the base 40; one end of the pack module 20 is fixedly connected to the base 40, and the other end is fixedly connected to the adjustable structure 30; one end of the adjustable structure 30 away from the pack module 20 is connected to the base 40; the insulating cover 10 covers the top of the pack module 20, and both ends of the insulating cover 10 are fixedly connected to the pack module 20; the BMS 50 is fixed to the end face of one end of the pack module 20.

[0026] In a preferred embodiment, the adjustable structure 30 includes a first fixing bar 31 and a second fixing bar 32 arranged vertically; the first fixing bar 31 is fixedly connected to the Pack module 20, and the second fixing bar 32 is adjustablely connected to the base 40.

[0027] In a preferred embodiment, the second fixing strip 32 is provided with several strip-shaped holes 321, which are arranged parallel to each other; the second fixing strip 32 is adjustably connected to the base 40 through the strip-shaped holes 321. By providing the strip-shaped holes 321, the distance between the second fixing strip 32 and the Pack module 20 can be adjusted according to actual needs to adapt to the manufacturing tolerances of different batches of battery cells, effectively improving the yield of the module and having good tolerance compatibility.

[0028] In a preferred embodiment, the strip-shaped hole 321 extends along the long side parallel to the base 40; the length of the strip-shaped hole 321 is less than the width of the second fixing strip 32. This arrangement allows the distance between the second fixing strip 32 and the Pack module 20 to be adjusted according to actual needs.

[0029] In a preferred embodiment, the first fixing strip 31, the second fixing strip 32, and the strip-shaped hole 321 are integrally formed. This arrangement can effectively improve the efficiency of installation and disassembly and ensure the stability of the connection.

[0030] In this embodiment, an elongated hole 11 is provided at one end of the insulating cover 10 near the adjustable structure 30. The length of the elongated hole 11 is adapted to the length of the strip hole 321. The elongated hole 11 extends along the direction parallel to the long side of the insulating cover 10. In this way, the insulating cover 10 can be adjusted according to the adjustment of the strip hole 321, ensuring the matching and stability of the structural connection.

[0031] In a preferred embodiment, the Pack module 20 includes a first end plate 21, a cell body 22, and a second end plate 23; one end of the cell body 22 is abutted against the first end plate 21, and the other end is abutted against the second end plate 23; the top of the first end plate 21 is fixedly connected to one end of the insulating cover 10, and the bottom of the first end plate 21 is fixedly connected to the first fixing strip 31; the top of the second end plate 23 is fixedly connected to the other end of the insulating cover 10, and the bottom of the second end plate 23 is fixedly connected to the end of the base plate 40 away from the first fixing strip 31.

[0032] In a preferred embodiment, the Pack module 20 further includes a first strap 24 and a second strap 25 surrounding the Pack module 20. The first strap 24 is positioned close to the insulating cover 10, and the second strap 25 is positioned close to the base plate 40. This arrangement ensures the stability of the module's fixation.

[0033] In a preferred embodiment, the first end plate 21 is provided with a first groove 211 adapted to the first strapping 24, and the second end plate 23 is provided with a second groove 231 adapted to the first strapping 24. The first groove 211 and the second groove 231 are opposite to and parallel to each other. One end of the first strapping 24 is engaged in the first groove 211, and the other end is engaged in the second groove 231. This arrangement can further ensure the stability of the module fixation.

[0034] In a preferred embodiment, the first end plate 21 is provided with a third groove 212 adapted to the second strapping 25, and the second end plate 23 is provided with a fourth groove 232 adapted to the second strapping 25. The third groove 212 and the fourth groove 232 are opposite to and parallel to each other. One end of the second strapping 25 is engaged in the third groove 212, and the other end is engaged in the fourth groove 232. This arrangement can further ensure the stability of the module fixation.

[0035] In a preferred embodiment, the BMS 50 is disposed on the side of the first end plate 21 away from the cell body 22, and the BMS 50 is disposed between the first groove 211 and the third groove 212.

[0036] In a preferred embodiment, from the first end plate 21 to the second end plate 23, the cell body 22 includes a plurality of cell units 221 stacked in parallel with each other, and adjacent cell units 221 are connected in series or in parallel through a busbar 26; the busbar 26 is located close to the insulating cover 10.

[0037] In a preferred embodiment, an insulating sheet 222 is provided between adjacent battery cells 221, and the insulating sheet 222 abuts against the battery cell 221; an insulating ring 60 is provided on the base 40, and the insulating ring 60 abuts against the base 40 and the battery cell 221 respectively.

[0038] In a preferred embodiment, the base 40 is provided with a base cutout 41 that matches the insulating ring 60; the base cutout 41 and the base 40 are integrally formed. By providing the base cutout 41 and the insulating ring 60, the thermal management efficiency of the module can be effectively improved, which is beneficial to the effective heat dissipation of the module.

[0039] In the embodiments of this application, the base 40 is further provided with a plurality of connecting holes 42, which are evenly distributed on the outer periphery of the base 40 and are connected to the base cutout 41. This further accelerates the heat dissipation of the module and further improves the thermal management efficiency of the module.

[0040] This application connects the Pack module to the base via an adjustable structure, enabling flexible adjustment of the base's fixed position and a step-by-step fixing mechanism for both ends of the Pack module. One end of the Pack module is rigidly fixed to one end of the base via bolts, while the other end can slide axially through the adjustment structure and then be locked again. This structure can adapt to the manufacturing tolerances of different batches of battery cells, effectively improving the module's yield and exhibiting good tolerance compatibility. This structure eliminates the need for cell thickness screening, effectively improving material utilization and offering good cost-effectiveness. It effectively solves problems associated with traditional battery pack module fixing structures, such as the inability to dynamically adjust dimensions, lack of flexible compensation mechanisms, poor thermal management efficiency, and high material and labor costs.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery pack module with self-adaptable length, characterized in that, The device includes an insulating cover, a pack module, an adjustable structure, a base, and a BMS. The pack module is mounted on the base. One end of the pack module is fixedly connected to the base, and the other end is fixedly connected to the adjustable structure. The end of the adjustable structure away from the pack module is connected to the base. The insulating cover covers the top of the pack module, and both ends of the insulating cover are fixedly connected to the pack module. The BMS is fixed to the end face of one end of the pack module.

2. The length self-adaptable battery Pack module according to claim 1, wherein, The adjustable structure includes a first fixing bar and a second fixing bar arranged vertically; the first fixing bar is fixedly connected to the Pack module, and the second fixing bar is adjustablely connected to the base. 3.The length self-adaptable battery Pack module according to claim 2, characterized in that, The second fixing strip has several strip-shaped holes arranged parallel to each other; the second fixing strip is adjustablely connected to the base through the strip-shaped holes.

4. The length self-adaptable battery Pack module according to claim 3, wherein, The strip-shaped hole extends along the direction parallel to the long side of the base; the length of the strip-shaped hole is less than the width of the second fixing strip; The first fixing strip, the second fixing strip, and the strip-shaped hole are integrally formed.

5. The length self-adaptable battery Pack module according to claim 2, wherein, The Pack module includes a first end plate, a cell body, and a second end plate; one end of the cell body is abutted against the first end plate, and the other end is abutted against the second end plate; the top of the first end plate is fixedly connected to one end of the insulating cover, and the bottom of the first end plate is fixedly connected to the first fixing strip; the top of the second end plate is fixedly connected to the other end of the insulating cover, and the bottom of the second end plate is fixedly connected to the end of the base away from the first fixing strip. 6.The length self-adaptable battery Pack module according to claim 5, wherein, The Pack module further includes a first strap and a second strap that surround the Pack module. The first strap is located near the insulating cover, and the second strap is located near the base.

7. The length self-adaptable battery Pack module according to claim 6, wherein, The first end plate is provided with a first groove adapted to the first strapping, and the second end plate is provided with a second groove adapted to the first strapping. The first groove and the second groove are opposite to and parallel to each other. One end of the first strapping is engaged in the first groove, and the other end is engaged in the second groove. The first end plate is provided with a third groove adapted to the second strapping, and the second end plate is provided with a fourth groove adapted to the second strapping. The third groove and the fourth groove are opposite to and parallel to each other. One end of the second strapping is engaged in the third groove and the other end is engaged in the fourth groove. 8.The length self-adaptable battery Pack module of claim 7, wherein, The BMS is disposed on the side of the first end plate away from the cell body, and the BMS is disposed between the first groove and the third groove. 9.The length self-adaptable battery Pack module of claim 5, wherein, From the first end plate to the second end plate, the cell body includes several cell units stacked in parallel with each other, and adjacent cell units are connected in series or in parallel through a busbar; the busbar is located close to the insulating cover. 10.The length self-adaptable battery Pack module of claim 9, wherein, An insulating sheet is provided between adjacent battery cells, and the insulating sheet abuts against the battery cell; an insulating ring is provided on the base, and the insulating ring abuts against the base and the battery cell respectively; The base has a base cutout that matches the insulating ring; the base cutout is integrally formed with the base.

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