Battery Pack module with length capable of being adaptively adjusted

Abstract

The invention discloses a battery pack module with the length capable of being adaptively adjusted. The battery pack module comprises an insulating cover, a pack module, an adjustable structure, a base and a BMS (Battery Management System), the Pack module is arranged on the base; one end of the Pack module is fixedly connected with the base, and the other end of the Pack module is fixedly connected with the adjustable structure; one end, far away from the Pack module, of the adjustable structure is connected with the base; the insulating cover covers the top of the Pack module, and the two ends of the insulating cover are fixedly connected with the Pack module respectively; and the BMS is fixed on the end surface of one end of the Pack module. By means of the mechanism that the fixing position of the base can be elastically adjusted and the two ends of the Pack module are fixed step by step, manufacturing tolerances of different batches of battery cells can be adapted, the yield of the module is effectively improved, the utilization rate of materials is high, and good tolerance compatibility and good cost effectiveness are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a battery pack module with adaptively adjustable length. Background Art

[0002] At present, battery pack modules mainly use rigid end plates to fix the stacking structure of battery cells, supplemented by insulating fillers and metal restraints to achieve physical constraints. Common battery pack module fixing structures include the following types: (1) Fixed module structure: After the battery cells are stacked in series and parallel, 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 adjusted dynamically. (2) Elastic compensation structure: Elastic parts are partially used 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 greater the number of cells in a stacked battery structure, the greater the cumulative deviation. For example, if the thickness tolerance of a single cell is ±0.5mm, the total thickness deviation of 8 cells stacked together can reach ±4mm. Furthermore, the need to grade and screen cell thickness increases material management costs, resulting in a significant loss in yield. After stacking, the module length must be dimensionally controlled, which also increases labor costs. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a battery pack module with adaptively adjustable length, aiming to solve the problems of the traditional battery pack module fixed structure that cannot be dynamically adjusted in size, lack of elastic compensation mechanism, poor thermal management efficiency, high material and labor costs.

[0005] To achieve the above-mentioned objectives, an embodiment of 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 arranged 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 is covered on the top of the pack module, and the two ends of the insulating cover are respectively fixedly connected to the pack module; the BMS is fixed on the end face of one end of the pack module.

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

[0007] As a preferred embodiment, the second fixing bar is provided with a plurality of strip-shaped holes, which are arranged parallel to each other; the second fixing bar is adjustably connected to the base through the strip-shaped holes.

[0008] As a preferred embodiment, the strip-shaped hole extends in a direction parallel to the long side of the base; the length of the strip-shaped hole is smaller than the width of the second fixing strip.

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

[0010] As a preferred embodiment, the Pack module includes a first end plate, a battery cell body and a second end plate; one end of the battery 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] As a preferred embodiment, the Pack module further includes a first strapping belt and a second strapping belt arranged to enclose the Pack module, the first strapping belt is arranged close to the insulating cover, and the second strapping belt is arranged close to the bottom plate.

[0012] As a preferred embodiment, a first groove adapted to the first strapping strap is provided on the first end plate, and a second groove adapted to the first strapping strap is provided on the second end plate, and the first groove and the second groove are arranged opposite and parallel to each other; one end of the first strapping strap is clamped in the first groove, and the other end is clamped in the second groove.

[0013] As a preferred embodiment, a third groove adapted to the second strapping strap is provided on the first end plate, and a fourth groove adapted to the second strapping strap is provided on the second end plate, and the third groove and the fourth groove are arranged opposite and parallel to each other; one end of the second strapping strap is clamped in the third groove, and the other end is clamped in the fourth groove.

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

[0015] As a preferred embodiment, in the direction from the first end plate to the second end plate, the battery cell body includes several battery cell units stacked parallel to each other, and adjacent battery cell units are connected in series or in parallel through a bus; the bus is arranged close to the insulating cover.

[0016] As a preferred embodiment, an insulating sheet is provided between adjacent battery cell units, and the insulating sheet is arranged in contact with the battery cell units; an insulating ring is provided on the base, and the insulating ring is arranged in contact with the base and the battery cell units respectively.

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

[0018] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: the present application connects the Pack module to the base through an adjustable structure, which can realize a mechanism for elastically adjusting the fixed position of the base and fixing the two ends of the Pack module in steps, so that one end of the Pack module is rigidly fixed to one end of the base by bolts, and the other end of the Pack module can be axially slid through the adjustment structure and then locked and fixed a second time. The structure of the present application can adapt to the manufacturing tolerances of different batches of battery cells, effectively improve the yield of the module, and have good tolerance compatibility. Through the structure of the present application, the battery cell unit thickness screening process can be eliminated, the utilization rate of materials can be effectively improved, it has good cost-effectiveness, and can effectively solve the problems of the traditional battery pack module fixed structure that the size cannot be dynamically adjusted, lacks an elastic compensation mechanism, has poor thermal management efficiency, and has high material and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[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 Schematic diagram of the exploded structure of the battery pack module with adaptively adjustable length;

[0022] Figure 3 for Figure 2 Schematic diagram of the adjustable structure and base. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. Parameters involving numerical ranges can implement the solutions of this application as long as they are within the scope required by this application.

[0025] Specifically, such as Figures 1 to 3 As shown, an embodiment of the present invention proposes the following technical solution: a battery Pack module with adaptively adjustable length, comprising an insulating cover 10, a Pack module 20, an adjustable structure 30, a base 40 and a BMS 50; the Pack module 20 is arranged 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; the 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 the two ends of the insulating cover 10 are respectively fixedly connected to the Pack module 20; the BMS 50 is fixed on the end face of one end of the Pack module 20.

[0026] As 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 adjustably connected to the base 40.

[0027] As a preferred embodiment, the second fixing bar 32 is provided with a plurality of strip-shaped holes 321, which are arranged parallel to each other. The second fixing bar 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 bar 32 and the pack module 20 can be adjusted as needed to adapt to the manufacturing tolerances of different batches of battery cells, effectively improving the module's yield rate and providing good tolerance compatibility.

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

[0029] As a preferred embodiment, the first fixing strip 31, the second fixing strip 32 and the strip-shaped hole 321 are integrally formed, so as to effectively improve the efficiency of installation and removal and ensure the stability of the connection.

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

[0031] As a preferred embodiment, the Pack module 20 includes a first end plate 21, a battery cell body 22 and a second end plate 23; one end of the battery 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 bar 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 bottom plate 40 away from the first fixing bar 31.

[0032] As a preferred embodiment, the Pack module 20 further includes a first strapping band 24 and a second strapping band 25 that are arranged to enclose the Pack module 20. The first strapping band 24 is arranged close to the insulating cover 10, and the second strapping band 25 is arranged close to the bottom plate 40. This arrangement can ensure the stability of the module fixation.

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

[0034] As a preferred embodiment, the first end plate 21 is provided with a third groove 212 adapted to fit the second strapping strap 25, and the second end plate 23 is provided with a fourth groove 232 adapted to fit the second strapping strap 25. The third groove 212 and the fourth groove 232 are arranged opposite and parallel to each other. One end of the second strapping strap 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] As a preferred embodiment, the BMS 50 is disposed on a side of the first end plate 21 away from the battery cell body 22 , and the BMS 50 is disposed between the first groove 211 and the third groove 212 .

[0036] As a preferred embodiment, in the direction from the first end plate 21 to the second end plate 23, the battery cell body 22 includes several battery cell units 221 stacked parallel to each other, and adjacent battery cell units 221 are connected in series or in parallel through a bus 26; the bus 26 is arranged close to the insulating cover 10.

[0037] As a preferred embodiment, an insulating sheet 222 is provided between adjacent battery cells 221 , and the insulating sheet 222 is arranged in contact with the battery cells 221 ; an insulating ring 60 is provided on the base 40 , and the insulating ring 60 is arranged in contact with the base 40 and the battery cells 221 respectively.

[0038] As a preferred embodiment, the base 40 is provided with a base hollow 41 adapted to mate with the insulating ring 60; the base hollow 41 is integrally formed with the base 40. The provision of the base hollow 41 and the insulating ring 60 can effectively improve the thermal management efficiency of the module and facilitate effective heat dissipation of the module.

[0039] In the embodiment of the present application, the base 40 is further provided with a plurality of communication holes 42, which are evenly arranged on the periphery of the base 40 and are connected to the base hollow 41. This can further accelerate the heat dissipation of the module and further improve the thermal management efficiency of the module.

[0040] The present application connects the Pack module to the base through an adjustable structure, which can realize a mechanism for elastically adjusting the fixed position of the base and step-by-step fixing of the two ends of the Pack module, so that one end of the Pack module is rigidly fixed to one end of the base by bolts, and the other end of the Pack module can be axially slid through the adjustment structure and then locked and fixed a second time. The structure of the present application can adapt to the manufacturing tolerances of different batches of battery cells, effectively improve the yield of the module, and have good tolerance compatibility. Through the structure of the present application, the battery cell unit thickness screening process can be eliminated, the utilization rate of materials can be effectively improved, and it has good cost-effectiveness. It can effectively solve the problems of the traditional battery pack module fixed structure that the size cannot be dynamically adjusted, lacks an elastic compensation mechanism, has poor thermal management efficiency, and has high material and labor costs.

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

Claims

1. A battery pack module with adaptively adjustable length, characterized in that: It includes an insulating cover, a Pack module, an adjustable structure, a base and a BMS; the Pack module is arranged 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 is covered on the top of the Pack module, and the two ends of the insulating cover are respectively fixedly connected to the Pack module; the BMS is fixed on the end face of one end of the Pack module.

2. The battery pack module with adaptive length adjustment according to claim 1, characterized in that: The adjustable structure includes a first fixing bar and a second fixing bar which are vertically arranged; the first fixing bar is fixedly connected to the Pack module, and the second fixing bar is adjustably connected to the base.

3. The length-adaptable battery pack module according to claim 2, characterized in that: The second fixing bar is provided with a plurality of strip-shaped holes, which are arranged parallel to each other; the second fixing bar is adjustably connected to the base through the strip-shaped holes.

4. The battery pack module with adaptive length adjustment according to claim 3, characterized in that: The strip-shaped hole is extended in a direction parallel to the long side of the base; the length of the strip-shaped hole is smaller 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 battery pack module with adaptive length adjustment according to claim 2, characterized in that: The Pack module includes a first end plate, a battery cell body and a second end plate; one end of the battery 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 bar; 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 bar.

6. The battery pack module with adaptive length adjustment according to claim 5, characterized in that: The Pack module further includes a first strapping belt and a second strapping belt arranged to enclose the Pack module. The first strapping belt is arranged close to the insulating cover, and the second strapping belt is arranged close to the bottom plate.

7. The battery pack module with adaptive length adjustment according to claim 6, characterized in that: The first end plate is provided with a first groove adapted to the first strapping strap, and the second end plate is provided with a second groove adapted to the first strapping strap, the first groove and the second groove being arranged opposite and parallel to each other; one end of the first strapping strap is clamped in the first groove, and the other end is clamped in the second groove; A third groove adapted to the second strapping strap is provided on the first end plate, and a fourth groove adapted to the second strapping strap is provided on the second end plate, and the third groove and the fourth groove are arranged opposite and parallel to each other; one end of the second strapping strap is clamped in the third groove, and the other end is clamped in the fourth groove.

8. The battery pack module with adaptive length adjustment according to claim 7, characterized in that: The BMS is disposed on a side of the first end plate away from the battery cell body, and the BMS is disposed between the first groove and the third groove.

9. The battery pack module with adaptive length adjustment according to claim 5, characterized in that: In the direction from the first end plate to the second end plate, the battery cell body includes a plurality of battery cell units stacked in parallel with each other, and adjacent battery cell units are connected in series or in parallel via a bus bar; the bus bar is arranged close to the insulating cover.

10. The battery pack module with adaptive length adjustment according to claim 9, characterized in that: An insulating sheet is provided between adjacent battery cells, and the insulating sheet is provided in contact with the battery cells; an insulating ring is provided on the base, and the insulating ring is provided in contact with the base and the battery cells respectively; The base is provided with a base hollow adapted to the insulating ring; the base hollow is integrally formed with the base.

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