PACK improved structure and battery pack

Abstract

The utility model provides a PACK improvement structure and a battery pack. The PACK improved structure comprises a plurality of single batteries and a shell. The shell is provided with a glue flowing channel and a plurality of accommodating grooves arranged in a linear array, the plurality of accommodating grooves and the plurality of single batteries are arranged in a one-to-one correspondence manner, each single battery is accommodated in the accommodating groove, the glue flowing channel is communicated with each accommodating groove, and a first bonding gap is formed on the outer wall of each single battery close to the groove wall of the corresponding accommodating groove; the first bonding gap corresponding to each single battery is filled with a first adhesive body, the first adhesive body corresponding to each accommodating groove is at most partially filled in the adhesive flow channel, and the first adhesive body corresponding to each accommodating groove is respectively attached to the groove wall of the corresponding accommodating groove and the side wall of the corresponding single battery. According to the PACK improved structure, the connection stability of the single batteries on the shell can be well improved, and the use safety is further improved.

Description

Technical Field

[0001] This utility model relates to the field of battery assembly technology, and in particular to an improved PACK structure and battery pack. Background Technology

[0002] Battery modules typically consist of several batteries assembled and fixed using brackets, then connected in series or parallel, such as by aluminum wire welding. These series- or parallel-connected batteries are then placed into a housing for secure assembly, as described in patent application CN201711359928.9. In this approach, each battery is attached to an independent cell bracket. However, during placement into the housing, the aluminum wire welding structure is easily damaged by pulling, affecting the stability of the series or parallel electrical connections. Therefore, existing solutions omit the brackets, allowing the batteries to be directly glued into the housing for fixation, as described in utility model patent application CN202021465745.2. This involves bonding the bottom of the batteries to the housing using AB glue. However, because AB glue is prone to curing, it affects the stability of the batteries within the housing, thus impacting the safety of the battery module. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a PACK improved structure and battery pack that can better improve the connection stability of the battery, thereby improving the safety of use.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An improved PACK structure includes a plurality of individual cells and a housing. The housing has a dispensing channel and a plurality of receiving slots arranged in a linear array. The plurality of receiving slots and the plurality of individual cells are arranged in a one-to-one correspondence. Each individual cell is housed in a receiving slot. The dispensing channel communicates with each receiving slot. A first bonding gap is formed on the outer wall of each individual cell adjacent to the wall of the corresponding receiving slot. The first bonding gap corresponding to each individual cell is filled with a first adhesive. At most part of the first adhesive corresponding to each receiving slot fills the dispensing channel. The first adhesive corresponding to each receiving slot is respectively attached to the wall of the corresponding receiving slot and the side wall of the corresponding individual cell.

[0006] In one embodiment, a second adhesive gap is formed between the bottom of each individual battery cell and the bottom of the receiving groove, the second adhesive gap being filled with a second adhesive body, the second adhesive body being attached to the bottom of the corresponding receiving groove and the bottom of the corresponding individual battery cell respectively.

[0007] In one embodiment, the first adhesive is connected to the second adhesive.

[0008] In one embodiment, the first adhesive and the second adhesive are integrally molded structures.

[0009] In one embodiment, the adhesive flow channel is connected to the bottom of the receiving tank.

[0010] In one embodiment, the housing is provided with a receiving strip, which is connected to the housing to form a glue flow channel and a plurality of receiving grooves.

[0011] In one embodiment, the accommodating strip and the housing are integrally formed.

[0012] In one embodiment, the accommodating strip is an insulating accommodating strip.

[0013] In one embodiment, the first adhesive is a polyurethane structural adhesive, an acrylic structural adhesive, a silicone adhesive, or an epoxy structural adhesive.

[0014] A battery pack includes a PCB board and the improved PACK structure described in any of the above embodiments, wherein the PCB board is electrically connected to each of the individual cells to enable the plurality of individual cells to be connected in series or in parallel.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] The improved PACK structure of this invention allows each individual battery cell to be disposed on a receiving groove, and the adhesive flow channel to be connected to each receiving groove. This ensures that when the individual battery cell is placed in the receiving groove, the structural adhesive in the receiving groove is in full contact and adheres to the individual battery cell, while excess structural adhesive can flow out of the receiving groove through the adhesive flow channel. This allows each individual battery cell to be well and fully contained within the receiving groove, and allows the outer wall of each individual battery cell to form a first bonding gap adjacent to the corresponding receiving groove wall. The first adhesive filling the first bonding gap effectively bonds and fixes the sidewall of the individual battery cell to the receiving groove wall, effectively reducing the relative movement of the individual battery cell to the casing, improving the fixation stability of the individual battery cell to the casing, and thus improving the safety of the improved PACK structure in use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the improved PACK structure according to one embodiment of the present invention;

[0019] Figure 2 for Figure 1 A magnified view of a portion of point A in the PACK improvement structure shown;

[0020] Figure 3 for Figure 2 A partial view of the PACK improved structure shown;

[0021] Figure 4 for Figure 3 A magnified view of part B of the PACK improved structure shown. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model 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 of this utility model.

[0023] 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.

[0024] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] This application provides an improved PACK structure. The improved PACK structure includes a plurality of individual cells and a housing. The housing is provided with a dispensing channel and a plurality of receiving slots arranged in a linear array. The plurality of receiving slots and the plurality of individual cells are arranged in a one-to-one correspondence. Each individual cell is housed in a receiving slot. The dispensing channel communicates with each receiving slot. A first bonding gap is formed on the outer wall of each individual cell adjacent to the wall of the corresponding receiving slot. The first bonding gap corresponding to each individual cell is filled with a first adhesive. The first adhesive corresponding to each receiving slot is at most partially filled at the dispensing channel. The first adhesive corresponding to each receiving slot is respectively attached to the wall of the corresponding receiving slot and the side wall of the corresponding individual cell.

[0026] The aforementioned improved PACK structure places each individual cell on a receiving groove, and connects the adhesive flow channel to each receiving groove. This ensures that when the individual cell is placed in the receiving groove, the structural adhesive in the receiving groove fully contacts and adheres to the individual cell, while excess structural adhesive can flow out of the receiving groove through the adhesive flow channel. This allows each individual cell to be well and fully contained within the receiving groove, and enables the outer wall of each individual cell to form a first bonding gap adjacent to the corresponding receiving groove wall. The first adhesive filling the first bonding gap effectively bonds and fixes the sidewall of the individual cell to the receiving groove wall, effectively reducing the relative movement of the individual cell to the casing, improving the fixation stability of the individual cell to the casing, and thus improving the safety of the improved PACK structure in use.

[0027] To better understand the improved PACK structure of this application, the following further explanation is provided:

[0028] Please refer to the following: Figures 1 to 4 One embodiment of the PACK improvement structure 10 includes a plurality of individual cells 100 and a housing 200. The housing 200 is provided with a dispensing channel 101 and a plurality of receiving grooves 102 arranged in a linear array. The plurality of receiving grooves 102 and the plurality of individual cells 100 are arranged in a one-to-one correspondence. Each individual cell 100 is housed in a receiving groove 102. The dispensing channel 101 communicates with each receiving groove 102. A first bonding gap 103 is formed on the outer wall of each individual cell 100 adjacent to the groove wall of the corresponding receiving groove 102. The first bonding gap 103 corresponding to each individual cell 100 is filled with a first adhesive (not shown in the figure). The first adhesive corresponding to each receiving groove 102 is at most partially filled in the dispensing channel 101. The first adhesive corresponding to each receiving groove 102 is respectively attached to the groove wall of the corresponding receiving groove 102 and the side wall of the corresponding individual cell 100.

[0029] The aforementioned improved PACK structure 10 allows each individual battery cell 100 to be disposed on a receiving groove 102, and the adhesive flow channel 101 to communicate with each receiving groove 102. This ensures that when the individual battery cell 100 is placed in the receiving groove 102, the structural adhesive in the receiving groove 102 fully contacts and adheres to the individual battery cell 100, while excess structural adhesive can flow out of the receiving groove 102 through the adhesive flow channel 101. This allows each individual battery cell 100 to be well and fully contained within the receiving groove 102, and allows the outer wall of each individual battery cell 100 to form a first bonding gap 103 adjacent to the corresponding receiving groove 102 wall. The first adhesive filling the first bonding gap 103 effectively bonds and fixes the sidewall of the individual battery cell 100 to the receiving groove 102 wall, effectively reducing the relative movement of the individual battery cell 100 on the housing 200, improving the fixation stability of the individual battery cell 100 on the housing 200, and thus improving the safety of the improved PACK structure 10.

[0030] In one embodiment, a second adhesive gap is formed between the bottom of each individual battery cell and the bottom of the receiving groove. This second adhesive gap is filled with a second adhesive body, which is attached to both the bottom of the corresponding receiving groove and the bottom of the corresponding individual battery cell. This allows the bottom of the individual battery cell to be fixed to the housing via the second adhesive body, while the sidewalls of the individual battery cell are fixed to the wall of the receiving groove via the first adhesive body. This effectively increases the bonding area of ​​the individual battery cell, thereby further improving the stability of the individual battery cell on the housing and ultimately enhancing the safety of the PACK structure.

[0031] In one embodiment, the first adhesive and the second adhesive are connected. Furthermore, the first adhesive and the second adhesive are integrally molded, which facilitates their rapid formation. This ensures that the first and second adhesives are formed simultaneously when the single cell is placed in the receiving groove, provided sufficient structural adhesive is used, thus significantly improving the assembly efficiency of the PACK improved structure.

[0032] In one embodiment, the adhesive flow channel is connected to the bottom of the receiving tank, which facilitates the outflow of structural adhesive from the receiving tank.

[0033] Please refer to the following: Figures 1 to 4 In one embodiment, a receiving strip 300 is provided on the housing 200. The receiving strip 300 is connected to the housing 200 to form a glue flow channel 101 and a plurality of receiving grooves 102, which reduces the overall thickness of the housing 200 and effectively realizes the effective formation of the receiving grooves 102 and the glue flow channel 101.

[0034] In one embodiment, the receiving strip and the housing are integrally formed, which improves the connection stability and compactness of the receiving strip and the housing, thereby improving the structural stability and compactness of the PACK improvement structure, and reducing the processing steps of the PACK improvement structure, thereby improving the processing efficiency of the PACK improvement structure.

[0035] In one embodiment, the receiving strip is an insulating receiving strip, which better ensures the insulating connection between the individual battery cell and the casing.

[0036] In one embodiment, the first adhesive is a polyurethane structural adhesive, an acrylic structural adhesive, a silicone adhesive, or an epoxy structural adhesive, which better ensures the bonding stability of the single cell to the casing.

[0037] This application also provides a battery pack. The battery pack includes a PCB board and an improved PACK structure according to any of the above embodiments. The PCB board is electrically connected to each individual battery cell, so that a plurality of individual batteries are connected in series or in parallel. Further, please refer to... Figures 1 to 4 In this embodiment, the PACK improvement structure 10 includes a plurality of individual cells 100 and a housing 200. The housing 200 is provided with a dispensing channel 101 and a plurality of receiving grooves 102 arranged in a linear array. The plurality of receiving grooves 102 and the plurality of individual cells 100 are arranged in a one-to-one correspondence. Each individual cell 100 is housed in a receiving groove 102. The dispensing channel 101 communicates with each receiving groove 102. A first bonding gap 103 is formed on the outer wall of each individual cell 100 adjacent to the groove wall of the corresponding receiving groove 102. The first bonding gap 103 corresponding to each individual cell 100 is filled with a first adhesive. The first adhesive corresponding to each receiving groove 102 is at most partially filled at the dispensing channel 101. The first adhesive corresponding to each receiving groove 102 is respectively attached to the groove wall of the corresponding receiving groove 102 and the side wall of the corresponding individual cell 100.

[0038] The aforementioned battery pack employs an improved PACK structure, which significantly enhances the stability of individual cells and thus better ensures the safety of the battery pack during use.

[0039] Compared with the prior art, the present invention has at least the following advantages:

[0040] The improved PACK structure 10 of this invention allows each individual battery cell 100 to be disposed on a receiving groove 102, and the adhesive flow channel 101 to communicate with each receiving groove 102. This ensures that when the individual battery cell 100 is placed in the receiving groove 102, the structural adhesive in the receiving groove 102 fully contacts and adheres to the individual battery cell 100, while excess structural adhesive can flow out of the receiving groove 102 through the adhesive flow channel 101. This allows each individual battery cell 100 to be well and fully disposed within the receiving groove 102, and allows the outer wall of each individual battery cell 100 to form a first bonding gap 103 adjacent to the corresponding receiving groove 102 wall. The first adhesive filling the first bonding gap 103 effectively bonds and fixes the sidewall of the individual battery cell 100 to the receiving groove 102 wall, effectively reducing the relative movement of the individual battery cell 100 on the housing 200, improving the fixation stability of the individual battery cell 100 on the housing 200, and thus improving the safety of the improved PACK structure 10.

[0041] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A PACK improvement structure comprising a plurality of single cells and a case, characterized by, The shell is provided with a glue flow channel and a plurality of accommodation grooves arranged in a linear array. The plurality of accommodation grooves and the plurality of single batteries are one-to-one correspondingly arranged. Each single battery is accommodated in the accommodation groove. The glue flow channel is in communication with each accommodation groove. The outer wall of each single battery is arranged adjacent to the groove wall of the corresponding accommodation groove to form a first bonding gap. The first adhesive body corresponding to each single battery is filled in the first bonding gap. At most part of the first adhesive body corresponding to each accommodation groove is filled in the glue flow channel. The first adhesive body corresponding to each accommodation groove is respectively attached to the groove wall of the corresponding accommodation groove and the side wall of the corresponding single battery.

2. The PACK improving structure according to claim 1, characterized by The bottom of each single battery is spaced apart from the groove bottom of the accommodation groove to form a second adhesive gap. The second adhesive gap is filled with a second adhesive body. The second adhesive body is respectively attached to the groove bottom of the corresponding accommodation groove and the bottom of the corresponding single battery.

3. The PACK improving structure according to claim 2, characterized by The first adhesive body is connected with the second adhesive body.

4. The structure for improving a PAK according to claim 3, wherein The first adhesive body and the second adhesive body are integrally formed.

5. The PACK improving structure according to claim 1, characterized by The glue flow channel is in communication with the groove bottom of the accommodation groove.

6. The PACK improving structure according to claim 1, characterized by The shell is provided with an accommodation strip. The accommodation strip is connected to the shell to surround the glue flow channel and the plurality of accommodation grooves.

7. The PACK improving structure according to claim 6, characterized by The accommodation strip and the shell are integrally formed.

8. The PACK improving structure according to claim 6, characterized by The accommodation strip is an insulating accommodation strip.

9. The PACK improving structure according to claim 1, characterized by The first adhesive body is a polyurethane structural adhesive, an acrylic structural adhesive, a silicone adhesive or an epoxy structural adhesive.

10. A battery pack, characterized by, The PACK improvement structure comprises a PCB board and any one of the PACK improvement structures according to claims 1 to 9. The PCB board is electrically connected with each single battery to connect the plurality of single batteries in series or in parallel.

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