Battery module

Abstract

The present disclosure provides a battery module. The battery module comprises a waterproof sealing structure and a battery cell assembly. The waterproof sealing structure forms a sealing cavity for accommodating the battery cell assembly. The waterproof sealing structure comprises a heat-shrinkable sleeve and a sealing shell. The heat-shrinkable sleeve forms a covering cavity and a heat-shrinkable opening in communication. The battery cell assembly is installed in the covering cavity through the heat-shrinkable opening, and the covering cavity covers the battery cell assembly. The sealing shell forms a sealing groove. One end of the battery cell assembly adjacent to the heat-shrinkable opening is accommodated and installed in the sealing groove. The sealing shell covers the heat-shrinkable opening. The inner circumferential wall of the sealing groove and the outer circumferential wall of the heat-shrinkable sleeve are sealingly connected, so that the sealing shell and the heat-shrinkable sleeve jointly form the sealing cavity. The battery module has good portability and low production cost.

Description

Technical Field

[0001] This disclosure relates to the technical field of battery modules, and in particular to a battery module. Background Technology

[0002] Battery modules are increasingly used in various fields such as mobile energy replenishment and emergency power supply, and their presence is felt in all aspects of energy utilization and storage. However, as the application scenarios of battery modules become more complex, in order to improve their service life and adapt to diverse environments, the protection level usually needs to meet the IP67 standard.

[0003] Most battery modules on the market currently use a full-shell design, with upper and lower shells forming a mounting cavity to house the battery module. This cavity is then filled with sealant to meet IP67 sealing requirements. However, to achieve this sealing effect, sufficient space must be left between the inner wall of the mounting cavity and the battery module for sealing. This results in a corresponding increase in the size of the upper and lower shells, significantly increasing the volume of the battery module and greatly reducing its portability. Furthermore, the full-shell design and the use of a large amount of sealant significantly increase the production cost of the battery module. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a battery module that is smaller in size and has a lower production cost.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] A battery module includes a waterproof sealing structure and a battery cell assembly, wherein the waterproof sealing structure forms a sealing cavity for accommodating and sealing the battery cell assembly;

[0007] The waterproof sealing structure includes a heat-shrinkable sleeve and a sealing shell. The heat-shrinkable sleeve has a communicating covering cavity and a heat-shrink opening. The battery cell assembly is installed in the covering cavity through the heat-shrink opening, and the covering cavity covers and confines the battery cell assembly. The sealing shell has a sealing groove. One end of the battery cell assembly adjacent to the heat-shrink opening is accommodated and installed in the sealing groove, so that the sealing shell covers the heat-shrink opening, and the inner peripheral wall of the sealing groove is sealed to the outer peripheral wall of the heat-shrinkable sleeve, so that the sealing shell and the heat-shrinkable sleeve together form the sealing cavity.

[0008] In one embodiment, the waterproof sealing structure further includes a first sealing block, which fills the gap between the inner peripheral wall of the sealing groove and the outer peripheral wall of the heat-shrinkable sleeve, so that the sealing shell is glued and fixed to the heat-shrinkable sleeve by the first sealing block.

[0009] In one embodiment, the waterproof sealing structure further includes a second sealing block that fills and seals the heat shrink joint.

[0010] In one embodiment, both the first sealant block and the second sealant block are polyesteramine sealant blocks.

[0011] In one embodiment, the heat-shrinkable sleeve has heat-shrink openings at both ends, and there are two sealing shells, which are respectively sealed and fixed to both ends of the heat-shrinkable sleeve and seal the heat-shrink openings.

[0012] In one embodiment, the two sealing shells are respectively glued and sealed to both ends of the heat-shrinkable sleeve and seal the heat-shrink opening.

[0013] In one embodiment, the heat-shrinkable sleeve is a Teflon heat-shrinkable sleeve.

[0014] In one embodiment, the thickness of the heat-shrinkable sleeve is 1mm-2mm.

[0015] In one embodiment, the sealing shell is a plastic sealing shell.

[0016] In one embodiment, the sealing shell is a one-piece injection molded structure.

[0017] Compared with the prior art, this disclosure has at least the following advantages:

[0018] 1. The aforementioned battery module, due to its waterproof sealing structure including a heat-shrinkable sleeve and a sealing shell, has a heat-shrinkable sleeve with a connected covering cavity and a heat-shrinkable opening. The battery cell assembly is installed in the covering cavity through the heat-shrinkable opening, and the covering cavity covers and confines the battery cell assembly. The sealing shell has a sealing groove, and the end of the battery cell assembly adjacent to the heat-shrinkable opening is accommodated and installed in the sealing groove, so that the sealing shell covers the heat-shrinkable opening, and the inner peripheral wall of the sealing groove is sealed to the outer peripheral wall of the heat-shrinkable sleeve, so that the sealing shell and the heat-shrinkable sleeve together form a sealing cavity, preventing external water or conductive liquid from entering the sealing cavity through the heat-shrinkable opening of the sealing sleeve. This effectively prevents the battery cell assembly from short-circuiting due to direct contact with external water or conductive liquid, thereby greatly improving the service life and safety of the battery module.

[0019] 2. Compared with the design of upper and lower full-shell sealing cavities for sealing and installing battery modules in the above-mentioned related technologies, the heat-shrinkable sleeve of this disclosure can tightly wrap around the cell assembly, and the heat-shrinkable opening of the heat-shrinkable sleeve is sealed by the sealing shell. This allows the heat-shrinkable sleeve of this disclosure to seal and limit the cell assembly without leaving space for glue application. This not only greatly reduces the amount of sealant used, but also greatly reduces the size of the battery module of this disclosure, thereby greatly improving the portability of the battery module of this disclosure, and also greatly reducing the production cost of the battery module of this disclosure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a battery module according to one embodiment;

[0022] Figure 2 for Figure 1 A schematic diagram of the internal structure of a partial structure of the battery module shown;

[0023] Figure 3 for Figure 2 A partially enlarged schematic diagram of the battery module shown;

[0024] Figure 4 for Figure 1 Another partial structural diagram of the battery module shown;

[0025] Figure 5 This is a schematic diagram of the structural model of the battery module. Detailed Implementation

[0026] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0030] like Figures 1 to 5 As shown, a battery module 10 in one embodiment includes a waterproof sealing structure 100 and a battery cell assembly 200. The waterproof sealing structure 100 forms a sealing cavity 110 for accommodating the sealed battery cell assembly 200. The waterproof sealing structure 100 includes a heat-shrinkable sleeve 120 and a sealing shell 130. The heat-shrinkable sleeve 120 forms a communicating covering cavity 121 and a heat-shrink opening 122. The battery cell assembly 200 is installed in the covering cavity 121 through the heat-shrink opening 122, and the covering cavity 121 covers and confines the battery cell assembly 200. The sealing shell 130 forms a sealing groove 131. One end of the heat shrink sleeve 122 is installed in the sealing groove 131 so that the sealing shell 130 covers the heat shrink sleeve 122, and the inner peripheral wall of the sealing groove 131 is sealed to the outer peripheral wall of the heat shrink sleeve 120 so that the sealing shell 130 and the heat shrink sleeve 120 together form a sealing cavity 110, preventing external water or conductive liquid from entering the sealing cavity 110 through the heat shrink sleeve 122 of the sealing sleeve. This effectively prevents the battery cell assembly 200 from short-circuiting due to direct contact with external water or conductive liquid, thereby greatly improving the service life and safety of the battery module 10.

[0031] like Figures 1 to 5As shown, further, compared with the design of sealing the battery module by forming a sealed cavity 110 with upper and lower full-shells in the above-mentioned related technologies, the heat-shrinkable sleeve 120 of this disclosure can tightly wrap around the cell assembly 200, and the heat-shrinkable opening 122 of the heat-shrinkable sleeve 120 is sealed by the sealing shell 130. This allows the heat-shrinkable sleeve 120 of this disclosure to seal and limit the cell assembly 200 without leaving space for glue application. This not only greatly reduces the amount of sealant used, but also greatly reduces the size of the battery module 10 of this disclosure, thereby greatly improving the portability of the battery module 10 of this disclosure, and also greatly reducing the production cost of the battery module 10 of this disclosure.

[0032] The aforementioned battery module 10, due to the waterproof sealing structure 100 including a heat-shrinkable sleeve 120 and a sealing shell 130, the heat-shrinkable sleeve 120 forms a communicating covering cavity 121 and a heat-shrink opening 122, the battery cell assembly 200 is installed in the covering cavity 121 through the heat-shrink opening 122, and the covering cavity 121 covers and confines the battery cell assembly 200; the sealing shell 130 forms a sealing groove 131, and one end of the battery cell assembly 200 adjacent to the heat-shrink opening 122 is accommodated and installed in the sealing groove 131 to achieve sealing. The shell 130 covers the heat shrink opening 122, and the inner peripheral wall of the sealing groove 131 is sealed to the outer peripheral wall of the heat shrink sleeve 120, so that the sealing shell 130 and the heat shrink sleeve 120 together form a sealing cavity 110, preventing external water or conductive liquid from entering the sealing cavity 110 through the heat shrink opening 122 of the sealing sleeve. This effectively prevents the battery cell assembly 200 from short-circuiting due to direct contact with external water or conductive liquid, thereby greatly improving the service life and safety of the battery module 10.

[0033] Compared to the design of sealing the battery module by forming a sealed cavity 110 with upper and lower full-shells in the aforementioned related technologies, the heat-shrinkable sleeve 120 of this disclosure can tightly wrap around the cell assembly 200, and the heat-shrinkable opening 122 of the heat-shrinkable sleeve 120 is sealed by the sealing shell 130. This allows the heat-shrinkable sleeve 120 of this disclosure to seal and limit the cell assembly 200 without leaving space for glue application. This not only greatly reduces the amount of sealant used, but also greatly reduces the size of the battery module 10 of this disclosure, thereby greatly improving the portability of the battery module 10 of this disclosure, and also greatly reducing the production cost of the battery module 10 of this disclosure.

[0034] like Figures 1 to 4As shown, in one embodiment, the waterproof sealing structure 100 further includes a first sealing block (not shown). The first sealing block fills the gap between the inner peripheral wall of the sealing groove 131 and the outer peripheral wall of the heat-shrinkable sleeve 120, so that the sealing shell 130 is glued and fixed to the heat-shrinkable sleeve 120 by the first sealing block. This prevents external water or other conductive liquids from entering the sealing cavity 110 through the gap between the sealing shell 130 and the heat-shrinkable sleeve 120, effectively preventing the battery cell assembly 200 from short-circuiting due to direct contact with external water or conductive liquids, thereby greatly improving the service life and safety of the battery module 10.

[0035] like Figures 1 to 4 As shown, in one embodiment, the waterproof sealing structure 100 further includes a second sealing block (not shown). The second sealing block fills and seals the heat shrink opening 122 to prevent external water or other conductive liquids from entering the encapsulation cavity 121 through the heat shrink opening 122. This further prevents the battery cell assembly 200 from short-circuiting due to direct contact with external water or conductive liquids, thus greatly improving the waterproof effect of the battery module 10 and significantly improving the service life and safety of the battery module 10.

[0036] In one embodiment, both the first and second sealant blocks are polyesteramine sealant blocks, so that the first and second sealant blocks can have good adhesion and sealing properties.

[0037] like Figures 1 to 4 As shown, in one embodiment, heat shrink sleeve 120 has heat shrink openings 122 at both ends to facilitate the installation of battery cell assembly 200 into the covering cavity 121, thereby improving the production efficiency of battery module 10; there are two sealing shells 130, which are respectively sealed and fixed to both ends of heat shrink sleeve 120 and seal the heat shrink openings 122 to prevent external water or other conductive liquids from entering the covering cavity 121 through the heat shrink openings 122, and to prevent the battery cell assembly 200 from short-circuiting due to direct contact with external water or conductive liquids.

[0038] like Figures 1 to 4 As shown, in one embodiment, two sealing shells 130 are respectively glued and sealed to both ends of the heat-shrinkable sleeve 120 and the heat-shrink opening 122 is sealed, so that the sealing shells can be more securely fixed at the preset position of the heat-shrinkable sleeve 120, and at the same time, the sealing performance of the sealing cavity 110 can be improved, thereby improving the waterproof performance of the battery module 10.

[0039] like Figures 1 to 4As shown, in one embodiment, the heat-shrinkable sleeve 120 is a Teflon heat-shrinkable sleeve. This not only enables the heat-shrinkable sleeve 120 to have good heat-shrinkability and sealing properties, allowing it to better and more tightly wrap around the battery cell assembly 200, thereby reducing the volume of the battery module 10 and improving its portability and waterproof performance, but also the Teflon heat-shrinkable sleeve has good thermal conductivity and insulation properties. This allows the Teflon heat-shrinkable sleeve to better dissipate the heat generated by the battery cell assembly 200, preventing thermal runaway caused by heat accumulation in the battery cell assembly 200. At the same time, it can also provide insulation protection for the battery cell assembly 200, thereby greatly improving the safety of the battery module 10.

[0040] like Figures 1 to 4 As shown, in one embodiment, the thickness of the heat-shrinkable sleeve 120 is 1mm-2mm, so that the heat-shrinkable sleeve 120 has good heat shrinkability and good structural strength.

[0041] like Figure 1 As shown, in one embodiment, the sealing shell 130 is a plastic sealing shell, so that the sealing shell 130 has better sealing performance and elasticity. It can not only effectively improve the sealing performance of the battery module 10, but also buffer and disperse the squeezing or impact force on the battery module 10 through its own elasticity, thereby greatly improving the service life of the battery module 10.

[0042] like Figure 1 As shown, in one embodiment, the sealing shell 130 is a one-time injection molded structure to reduce the production difficulty of the sealing shell 130 and improve the production efficiency of the battery module 10.

[0043] like Figure 1 As shown, in one embodiment, the waterproof sealing structure 100 has a vent hole (not shown) communicating with the sealing cavity 110. A waterproof and breathable membrane (not shown) is provided on the sealing cover at the vent hole. The waterproof and breathable membrane is bonded and fixed to the outer wall of the waterproof sealing structure 100 so that the gas in the sealing cavity 110 can be discharged through the vent hole. At the same time, the waterproof and breathable membrane can also prevent external water or other conductive liquids from entering the sealing cavity through the vent hole, thereby greatly improving the service life and safety of the battery module.

[0044] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A battery module (10), characterized in that, It includes a waterproof sealing structure (100) and a battery cell assembly (200), wherein the waterproof sealing structure (100) forms a sealing cavity (110) for accommodating and sealing the battery cell assembly (200); The waterproof sealing structure (100) includes a heat-shrinkable sleeve (120) and a sealing shell (130). The heat-shrinkable sleeve (120) has a communicating covering cavity (121) and a heat-shrink opening (122). The battery cell assembly (200) is installed in the covering cavity (121) through the heat-shrink opening (122), and the covering cavity (121) covers and confines the battery cell assembly (200). The sealing shell (130) has a sealing... The cell assembly (200) is installed in the sealing groove (131) at one end adjacent to the heat shrink opening (122), so that the sealing shell (130) covers the heat shrink opening (122), and the inner peripheral wall of the sealing groove (131) is sealed to the outer peripheral wall of the heat shrink sleeve (120), so that the sealing shell (130) and the heat shrink sleeve (120) together form the sealing cavity (110).

2. The battery module (10) according to claim 1, characterized in that, The waterproof sealing structure (100) further includes a first sealing block, which fills the gap between the inner peripheral wall of the sealing groove (131) and the outer peripheral wall of the heat shrinkable sleeve (120) so that the sealing shell (130) is glued and fixed to the heat shrinkable sleeve (120) by the first sealing block.

3. The battery module (10) according to claim 2, characterized in that, The waterproof sealing structure (100) further includes a second sealing block, which fills and seals the heat shrink joint (122).

4. The battery module (10) according to claim 3, characterized in that, Both the first and second sealing blocks are polyesteramine sealing blocks.

5. The battery module (10) according to claim 1, characterized in that, The heat-shrinkable sleeve (120) has heat-shrink openings (122) at both ends. There are two sealing shells (130), which are respectively sealed and fixed to both ends of the heat-shrinkable sleeve (120) and seal the heat-shrink openings (122).

6. The battery module (10) according to claim 5, characterized in that, The two sealing shells (130) are respectively glued and sealed to both ends of the heat-shrinkable sleeve (120) and seal the heat-shrink opening (122).

7. The battery module (10) according to claim 1, characterized in that, The heat-shrinkable sleeve (120) is a Teflon heat-shrinkable sleeve.

8. The battery module (10) according to claim 1, characterized in that, The thickness of the heat-shrinkable sleeve (120) is 1mm-2mm.

9. The battery module (10) according to claim 1, characterized in that, The sealing shell (130) is a plastic sealing shell.

10. The battery module (10) according to claim 9, characterized in that, The sealing shell (130) is a one-time injection molded structure.

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