Battery module and battery device

Abstract

The utility model relates to new energy battery technical field especially discloses a battery module and battery device, and the battery module includes battery assembly and compression assembly, and the compression assembly includes the top plate, bottom plate and two side plates of connection, and at least one of top plate and bottom plate is detachably connected with two side plates, and the top plate, bottom plate and two side plates are tightly pressed on the outer circumferential side of battery assembly, the compression assembly board -like structure assembly of the utility model forms, has reduced the processing difficulty, and the split design of compression assembly is convenient to dismount to be convenient for the replacement and maintenance to compression assembly.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to a battery module and battery device. Background Technology

[0002] Pouch lithium batteries have been widely used in electric two-wheelers due to their high energy density and flexible design. However, during charging and discharging, the cells of pouch lithium batteries are prone to expansion and deformation, leading to poor interface contact and increased thermal resistance, thus reducing battery life. Therefore, most existing pouch lithium batteries are equipped with clamping components to suppress their expansion.

[0003] Existing clamping components are usually formed by injection molding in one piece, requiring specific molds, which makes them difficult to process and inconvenient to replace and maintain. Utility Model Content

[0004] The main purpose of this utility model is to propose a battery module and battery device, which aims to solve the problems that the current pressing parts of soft-pack lithium batteries are difficult to process and inconvenient to replace and maintain.

[0005] To address the above problems, this utility model proposes a battery module, comprising: Battery components; and A clamping assembly includes a top plate, a bottom plate, and two side plates connected together. At least one of the top plate and the bottom plate is detachably connected to the two side plates. The top plate, the bottom plate, and the two side plates are pressed tightly against the outer periphery of the battery assembly.

[0006] In one embodiment, the top plate includes a first pressing part and two first connecting parts, the two first connecting parts being connected to both sides of the first pressing part, and one first connecting part being threadedly connected to a side plate.

[0007] In one embodiment, a second connecting portion is provided at the top of each of the two side plates relative to the position of the first connecting portion, and a first connecting portion is threadedly connected to a second connecting portion.

[0008] In one embodiment, the length of the first clamping part is less than the length of the battery assembly, and the first clamping part is pressed tightly against the middle part of the battery assembly along its length direction.

[0009] In one embodiment, both side plates are provided with a plurality of perforated holes spaced apart.

[0010] In one embodiment, the top plate, the bottom plate, and the two side plates are all sheet metal parts.

[0011] In one embodiment, the battery module further includes a foam assembly, the foam assembly including four first foams sandwiched between the clamping assembly and the battery assembly.

[0012] In one embodiment, the foam assembly further includes a second foam, the battery module includes a plurality of pouch cells and a busbar, the plurality of pouch cells are stacked, the busbar is electrically connected to one end of the plurality of pouch cells, and the second foam is disposed in the gap between the busbar and the plurality of pouch cells.

[0013] In one embodiment, the battery module further includes two insulating plates, which are mounted at both ends of the battery assembly.

[0014] This utility model also proposes a battery device, which includes a housing, an end cap, and a battery module. The battery module is the battery module described above. The battery module is installed inside the housing. One end of the housing has an opening, and the end cap is fitted onto the opening.

[0015] This utility model proposes a battery module, including a battery assembly and a clamping assembly. The clamping assembly includes a top plate, a bottom plate, and two side plates connected to each other. The top plate, bottom plate, and two side plates are pressed tightly against the outer periphery of the battery assembly, thereby applying a pre-tightening force to the battery assembly. At the same time, at least one of the top plate and the bottom plate is detachably connected to the two side plates, which facilitates the disassembly and assembly of the clamping assembly, thereby facilitating the replacement and maintenance of the clamping assembly. Attached Figure Description

[0016] 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 any inventive effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the battery module of this utility model; Figure 2 for Figure 1 The diagram shows the structure of the clamping assembly in the battery module. Figure 3 This is a schematic diagram of the structure of an embodiment of the battery device of this utility model.

[0018] Explanation of icon numbers: 100. Battery module; 10. Battery assembly; 11. Soft-pack battery; 12. Busbar; 20. Pressing assembly; 21. Top plate; 211. First pressing part; 212. First connecting part; 22. Bottom plate; 23. Side plate; 231. Hole; 24. Second connecting part; 30. Foam assembly; 31. First foam; 32. Second foam; 40. Insulating plate; 200. Housing; 300. End cap; The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] 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 inventive effort are within the protection scope of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] 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 indicated technical features. 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 scope of protection claimed by this utility model.

[0022] Pouch lithium batteries have been widely used in electric two-wheelers due to their high energy density and flexible design. However, during charging and discharging, the cells of pouch lithium batteries are prone to expansion and deformation, leading to poor interface contact, increased thermal resistance, and thus reduced battery life. Therefore, most existing pouch lithium batteries have clamping components to suppress their expansion. However, existing clamping components are usually integrally injection molded, which is difficult to manufacture and inconvenient to replace and maintain.

[0023] To address the aforementioned issues, this utility model proposes a battery module that aims to solve the problems of the high processing difficulty and inconvenience in replacing and maintaining the clamping components of current soft-pack lithium batteries.

[0024] like Figure 1 In one embodiment, the battery module 100 includes a battery assembly 10 and a clamping assembly 20. The clamping assembly 20 includes a top plate 21, a bottom plate 22 and two side plates 23 connected to each other. At least one of the top plate 21 and the bottom plate 22 is detachably connected to the two side plates 23. The top plate 21, the bottom plate 22 and the two side plates 23 are pressed tightly against the outer periphery of the battery assembly 10.

[0025] In this embodiment, the battery assembly 10 is the core unit of the battery module 100, composed of multiple soft-pack cells connected in series or parallel. The clamping assembly 20 is a modular fixing structure designed to address the expansion problem of the soft-pack battery 11. It includes a top plate 21, a bottom plate 22, and two side plates 23. The top plate 21, bottom plate 22, and side plates 23 are all made of aluminum alloy or sheet metal by stamping, and are integrally formed by threaded connections or partial threaded connections, or adjacent plates are interlocked to form the clamping assembly 20. The dimensions of the top plate 21, bottom plate 22, and side plates 23 are adapted to the dimensions of the battery assembly 10, so that the four-plate clamping structure forms a uniform constraint force, ensuring that the clamping assembly 20 can be tightly pressed against the outer periphery of the battery assembly 10, accurately suppressing the expansion of the soft-pack battery 11.

[0026] In this embodiment, the clamping assembly 20 is assembled from rectangular plate structures, eliminating the need for integrated injection molding and significantly reducing production costs and cycle time. Furthermore, the top plate 21 or bottom plate 22 is detachably connected to the side plate 23, allowing maintenance of the pouch battery 11 without damaging the overall frame; only individual plate structures need to be disassembled to remove the battery assembly 10. Additionally, if a single plate is damaged, only the damaged plate needs to be replaced, eliminating the need for complete replacement, further improving the ease of disassembly of the clamping assembly 20. Moreover, by replacing the top plate 21, bottom plate 22, and side plate 23 with different sizes, it can accommodate pouch batteries 11 of different sizes, further enhancing the versatility of the clamping assembly 20.

[0027] like Figure 1 and Figure 2 In one embodiment, the top plate 21 includes a first pressing part 211 and two first connecting parts 212. The two first connecting parts 212 are connected to both sides of the first pressing part 211, and one first connecting part 212 is threaded to a side plate 23.

[0028] In this embodiment, the first clamping part 211 and the two first connecting parts 212 are manufactured by welding or as a single unit to ensure the stability of the connection between them. The first clamping part 211 and the two first connecting parts 212 give the top plate 21 an overall U-shaped structure. The two first connecting parts 212 and the two side plates 23 are each provided with threaded holes at corresponding positions, and bolts are inserted into the corresponding threaded holes to achieve a detachable connection between the top plate 21 and the side plates 23. The design of the first connecting part 212 reduces the difficulty of connecting the top plate 21 and the side plates 23, thereby improving the ease of disassembly of the clamping assembly 20.

[0029] The base plate 22 can also be welded to the side plate 23 or integrated into a single design to improve the modularity of the clamping assembly 20 and enhance its overall structural stability. In other embodiments, the base plate 22 can also be designed as described above to achieve a detachable connection with the side plate 23.

[0030] like Figure 1 and Figure 2 In one embodiment, the top ends of both side plates 23 are provided with second connecting portions 24 at positions relative to the first connecting portion 212, and a first connecting portion 212 is threadedly connected to a second connecting portion 24.

[0031] In this embodiment, the top plate 21 of the two side plates 23 is welded or integrally formed with a second connecting part 24. The second connecting part 24 is also a plate structure. The second connecting part 24 makes the side plate 23 form a stepped design. The second connecting part 24 protrudes from the top surface of the battery assembly 10 and is threadedly connected to the first connecting part 212, which further improves the ease of disassembly and assembly between the top plate 21 and the side plate 23.

[0032] like Figure 1 In one embodiment, the length of the first pressing part 211 is less than the length of the battery assembly 10, and the first pressing part 211 is pressed tightly against the middle part of the battery assembly 10 along the length direction.

[0033] In this embodiment, the length dimension of the first pressing part 211 is smaller than the length dimension of the battery assembly 10, so that the first pressing part 211 only presses against the middle position of the battery assembly 10 along its own length direction (i.e., the position where the battery assembly 10 is prone to expansion). This design can effectively avoid cell deformation and poor interface contact caused by excessive expansion in the middle, and also save materials and reduce manufacturing costs. In addition, this design avoids the top plate 21 from completely covering the battery assembly 10, thereby improving the heat dissipation effect of the battery assembly 10 and increasing the service life of the battery assembly 10.

[0034] In other embodiments, the first pressing part 211 may also have heat dissipation holes to further improve the heat dissipation effect on the battery assembly 10.

[0035] like Figure 1 and Figure 2 In one embodiment, both side plates 23 are provided with a plurality of perforated holes 231 spaced apart.

[0036] In this embodiment, the perforated hole 231 can be rectangular, circular, or otherwise, and is not limited thereto. Multiple perforated holes 231 are evenly distributed on the side plate 23, which further improves the heat dissipation of the battery assembly 10 without affecting the pressing effect of the side plate 23 on the battery assembly 10, thereby increasing the service life of the battery assembly 10. In addition, this design achieves a lightweight design for the side plate 23 and improves the ease of assembly and disassembly of the pressing assembly 20.

[0037] In other embodiments, the base plate 22 is also provided with a plurality of perforated holes 231 spaced apart.

[0038] In one embodiment, the top plate 21, the bottom plate 22, and the two side plates 23 are all sheet metal parts.

[0039] In this embodiment, the clamping component 20 is a sheet metal part. This design greatly reduces the processing difficulty of the clamping component 20 and achieves a lightweight design of the clamping component 20.

[0040] like Figure 1 In one embodiment, the battery module 100 further includes a foam assembly 30, which includes four first foams 31 sandwiched between the clamping assembly 20 and the battery assembly 10.

[0041] In this embodiment, a first foam 31 is sandwiched between the top plate 21, the bottom plate 22, and the two side plates 23 and the battery assembly 10. The design of the first foam 31 can effectively buffer vibration and impact, thereby improving the structural stability of the soft-pack battery 11, while also improving the insulation performance of the battery assembly 10 and the working safety of the battery assembly 10.

[0042] like Figure 1 In one embodiment, the foam assembly 30 further includes a second foam 32, and the battery module 100 includes a plurality of pouch batteries 11 and a busbar 12. The plurality of pouch batteries 11 are stacked and arranged, and the busbar 12 is electrically connected to one end of the plurality of pouch batteries 11. The second foam 32 is disposed in the gap between the busbar 12 and the plurality of pouch batteries 11.

[0043] In this embodiment, the second foam 32 serves as a buffer insulation mechanism between the busbar 12 and the pouch battery 11, achieving insulation of the installation gap of the pouch battery 11 and further improving the operational safety of the battery assembly 10.

[0044] like Figure 1In one embodiment, the battery module 100 further includes two insulating plates 40, which are mounted at both ends of the battery assembly 10.

[0045] In this embodiment, two insulating plates 40 are installed at the front and rear ends of the battery assembly 10. The two insulating plates 40, together with the first foam 31 and the second foam 32, achieve all-round insulation of the battery assembly 10, further reducing the possibility of leakage and short circuit in the battery assembly 10. At the same time, the two insulating plates 40 can also protect the front and rear ends of the battery assembly 10, further improving the impact resistance of the battery assembly 10.

[0046] like Figure 3 This utility model also proposes a battery device, including a housing 200, an end cap 300, and a battery module 100. The battery module 100 is installed inside the housing 200, and one end of the housing 200 has an opening, which is covered by the end cap 300. The specific structure of the battery module 100 is as described in the above embodiments. Since the battery module 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0047] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and 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 module, characterized in that, The battery module includes: Battery components; and A clamping assembly includes a top plate, a bottom plate, and two side plates connected together. At least one of the top plate and the bottom plate is detachably connected to the two side plates. The top plate, the bottom plate, and the two side plates are pressed tightly against the outer periphery of the battery assembly.

2. The battery module as described in claim 1, characterized in that, The top plate includes a first pressing part and two first connecting parts. The two first connecting parts are connected to both sides of the first pressing part, and one first connecting part is threadedly connected to one of the side plates.

3. The battery module as described in claim 2, characterized in that, Each of the first connecting portions is connected to the side of the clamping portion away from the battery assembly, and the top ends of both side plates are provided with second connecting portions at positions relative to the first connecting portions, and a first connecting portion is threadedly connected to a second connecting portion.

4. The battery module as described in claim 2, characterized in that, The length of the first clamping part is less than the length of the battery assembly, and the first clamping part is pressed tightly against the middle part of the battery assembly along its length direction.

5. The battery module as described in claim 1, characterized in that, Both side plates are provided with multiple perforated holes spaced apart.

6. The battery module as described in any one of claims 1 to 5, characterized in that, The top plate, the bottom plate, and the two side plates are all sheet metal parts.

7. The battery module as described in any one of claims 1 to 5, characterized in that, The battery module also includes a foam assembly, which includes four first foams sandwiched between the clamping assembly and the battery assembly.

8. The battery module as described in claim 7, characterized in that, The foam assembly further includes a second foam, and the battery module includes multiple pouch batteries and a busbar. The multiple pouch batteries are stacked and the busbar is electrically connected to one end of the multiple pouch batteries. The second foam is disposed in the gap between the busbar and the multiple pouch batteries.

9. The battery module as described in claim 1, characterized in that, The battery module also includes two insulating plates, which are installed at both ends of the battery assembly.

10. A battery device, characterized in that, The battery device includes a housing, an end cap, and a battery module. The battery module is the battery module as described in any one of claims 1 to 9. The battery module is installed inside the housing. One end of the housing has an opening, and the end cap is fitted onto the opening.

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