Shell assembly and battery

Abstract

The utility model discloses a shell assembly and a battery, and belongs to the technical field of power batteries. The shell assembly comprises a shell, a connecting column, a first plastic part and a second plastic part, the shell comprises a side plate, and the side plate is provided with a through hole; the first plastic part is arranged outside the shell, the second plastic part is arranged inside the shell, and the first plastic part and the second plastic part are arranged on the two sides of the side plate. The connecting column penetrates through the through hole, and the two ends of the connecting column are connected with the first plastic part and the second plastic part respectively. According to the shell assembly and the battery disclosed by the utility model, one-time assembly of the first plastic part, the second plastic part and the side plate is realized through the connecting column, the assembly difficulty of the first plastic part, the second plastic part and the cover plate is reduced, and the assembly difficulty of the shell assembly and the battery is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a shell assembly and a battery. Background Art

[0002] In related technologies, such as Figure 1 As shown, the battery includes a cover assembly 1', a shell, a battery cell, a tab and a pole 2', etc. The cover assembly 1' includes a cover 11', a first plastic part 12' and a second plastic part 13'. The first plastic part 12' and the second plastic part 13' are arranged on both sides of the cover 11', the cover assembly 1' is covered on the shell, the pole 2' and the cover assembly 1', the tab connects the battery cell and the pole 2', the battery cell, the tab, the second plastic part 13' and part of the pole 2' are all arranged in the shell, the second plastic part 13' is used to isolate the battery cell, the tab and the pole 2' from the cover 11', and the first plastic part 12' is used to isolate the pole 2' from the cover 11'. The first plastic part 12 ′ and the second plastic part 13 ′ are respectively injection-molded with the cover plate 11 ′, and the assembly of the cover plate assembly 1 ′ is relatively difficult, thereby increasing the difficulty of assembling the housing assembly and the battery. Utility Model Content

[0003] The purpose of the present utility model is to provide a housing assembly and a battery, which reduce the difficulty of assembling the first plastic part, the second plastic part and the cover plate, and further reduce the difficulty of assembling the housing assembly and the battery.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] In one aspect, a housing assembly is provided, comprising:

[0006] A housing, the housing comprising a side panel, the side panel being provided with a through hole;

[0007] a first plastic part and a second plastic part, wherein the first plastic part is arranged outside the shell, the second plastic part is arranged inside the shell, and the first plastic part and the second plastic part are arranged on both sides of the side panel;

[0008] A connecting column is provided in the through hole, and two ends of the connecting column are respectively connected to the first plastic part and the second plastic part.

[0009] In some possible implementations, the connecting post is integrally connected to the first plastic part, and the connecting post is connected to the second plastic part by hot melting or hot riveting; and / or

[0010] The connecting column is integrally connected to the second plastic part, and the connecting column is connected to the first plastic part by hot melting or hot riveting.

[0011] In some possible embodiments, the connecting column is provided with an end cap. When the connecting column is connected to the second plastic part by hot melting or hot riveting, the second plastic part is provided with a first sink groove, and the end cap is provided in the first sink groove; when the connecting column is connected to the first plastic part by hot melting or hot riveting, the first plastic part is provided with a second sink groove, and the end cap is provided in the second sink groove.

[0012] In some possible implementations, the number of the connecting pillars is greater than or equal to 1.

[0013] In some possible implementations, the side plate is provided with a receiving groove, the first plastic part is received in the receiving groove, a flange edge is provided around the first plastic part, and the width of the flange edge is 0-10 mm.

[0014] In some possible embodiments, the shell is used to accommodate a battery cell, the battery cell is provided with a tab, the side panel faces the tab, the first plastic part, the side panel and the second plastic part form a through hole, and the tab passes through the through hole to extend outside the shell.

[0015] In some possible embodiments, the battery cell is provided with two said pole tabs, and the two said pole tabs are located on the same side of the battery cell. Two of the first plastic parts and two of the second plastic parts are provided respectively, and the two said pole tabs are arranged corresponding to the two first plastic parts, and the two said pole tabs are arranged corresponding to the two second plastic parts. The two first plastic parts are an integral structure or a split structure, and the two second plastic parts are an integral structure or a split structure.

[0016] In some possible implementations, the number of the through holes is greater than or equal to 1.

[0017] In some possible implementations, there are two through holes, and the connecting column is disposed between two adjacent through holes.

[0018] On the other hand, a battery is provided, comprising a battery cell and a shell assembly as described in any one of the above items, wherein the battery cell is accommodated in an outer shell of the shell assembly.

[0019] Beneficial effects of the utility model:

[0020] The present invention provides a housing assembly and battery, wherein first and second plastic parts are disposed on either side of a side panel. Connecting posts are provided through through-holes, with their ends connected to the first and second plastic parts, respectively. The connecting posts enable one-stop assembly of the first and second plastic parts and the side panel. Compared to the prior art, in which the first and second plastic parts are injection molded separately from the cover plate, this simplifies assembly steps and reduces assembly difficulty. Providing through-holes in the side panel prevents the connecting posts, first and second plastic parts from falling off the side panel, resulting in improved reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a cover plate assembly and a pole in the prior art;

[0022] Figure 2 It is an exploded view of a housing assembly provided in a specific embodiment of the present utility model;

[0023] Figure 3 It is a front view of the housing assembly provided by a specific embodiment of the present utility model;

[0024] Figure 4 yes Figure 3 AA cross-sectional view;

[0025] Figure 5 yes Figure 4 Enlarged view of point N.

[0026] In the picture:

[0027] 1', cover plate assembly; 2', pole; 11', cover plate; 12', first plastic part; 13', second plastic part;

[0028] 1. Housing; 11. Side panel; 111. Through hole; 112. Receiving groove; 113. First communicating hole; 114. Liquid injection port;

[0029] 2. First plastic part; 21. Flange edge; 22. Second connecting hole; 23. Second sink;

[0030] 3. Second plastic part; 31. Third connecting hole; 32. Protrusion;

[0031] 4. Connecting column; 41. End cap;

[0032] 5. Explosion-proof valve;

[0033] V. Through hole. DETAILED DESCRIPTION

[0034] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0035] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] This embodiment provides a housing assembly, such as Figure 2-Figure 5 As shown, it includes a shell 1, a first plastic part 2, a second plastic part 3 and a connecting column 4. The shell 1 includes a side panel 11, and the side panel 11 is provided with a through hole 111. The first plastic part 2 is provided on the outside of the shell 1, and the second plastic part 3 is provided on the inside of the shell 1. The first plastic part 2 and the second plastic part 3 are provided on both sides of the side panel 11. The connecting column 4 is passed through the through hole 111, and its two ends are respectively connected to the first plastic part 2 and the second plastic part 3. Through the connecting column 4, the one-time assembly of the first plastic part 2, the second plastic part 3 and the side panel 11 is achieved. Compared with the existing technology, the first plastic part and the second plastic part are respectively injection molded with the cover plate, which simplifies the assembly steps and reduces the difficulty of assembly. By providing a through hole 111 in the side panel 11, the connecting column 4, the first plastic part 2 and the second plastic part 3 are prevented from falling off on the side panel 11, and the reliability is improved.

[0038] Optionally, the number of the connecting pillars 4 is greater than or equal to 1, and the connection reliability is improved by increasing the number of the connecting pillars 4 .

[0039] In the first embodiment, the connecting column 4 is integrally connected to the first plastic part 2, and the connecting column 4 is provided in the second plastic part 3. The connecting column 4 is connected to the second plastic part 3 by hot melting or hot riveting. Exemplarily, the connecting column 4 passes through the side plate 11 and the second plastic part 3 in sequence, and the connecting column 4 is hot melted or hot riveted on the side of the second plastic part 3 away from the first plastic part 2 to form an end cap 41 to achieve axial limitation and prevent the structure from falling off. The second plastic part 3 is provided with a first sink groove, and the end cap 41 is provided in the first sink groove to avoid the end cap 41 protruding and affecting the assembly of other structures. Furthermore, the end face of the opening of the second plastic part 3 is flush with the end face of the end cap 41, or the end face of the end cap 41 is lower than the end face of the opening of the second plastic part 3 to avoid structural interference. Furthermore, the end cap 41 formed by hot riveting or hot melting can have an outer shape that is circular, rectangular, runway-shaped, triangular, etc.

[0040] In the second embodiment, the connecting post 4 is integrally connected to the second plastic part 3, which is disposed through the first plastic part 2. The connecting post 4 is connected to the first plastic part 2 by hot melt or hot riveting. When the connecting post 4 is connected to the first plastic part 2 by hot melt or hot riveting, the first plastic part 2 is provided with a second recessed groove 23, and the end cap 41 is disposed in the second recessed groove 23. When the connecting post 4 is connected to the first plastic part 2 by hot melt or hot riveting, the end surface of the opening in the first plastic part 2 is flush with the end surface of the connecting post 4. Alternatively, the end surface of the end cap 41 is lower than the end surface of the opening in the first plastic part 2 to avoid structural interference.

[0041] In the third embodiment, part of the connecting columns 4 are integrally connected to the first plastic part 2 and are connected to the second plastic part 3 by hot riveting or hot melting, and another part of the connecting columns 4 are integrally connected to the second plastic part 3 and are connected to the first plastic part 2 by hot melting or hot riveting, which is a combination of the first embodiment and the second embodiment, and the details are not repeated here.

[0042] Optionally, the second plastic part 3 is plate-shaped, which reduces the internal space occupied by the second plastic part 3 and can improve the internal space utilization of the battery, increase the battery capacity and the volume of the gap battery.

[0043] The outer shell 1 is used to accommodate the battery cell, which is provided with a tab. The side panel 11 faces the tab. The first plastic part 2, the side panel 11 and the second plastic part 3 form a through hole V. The tab passes through the through hole V to extend outside the outer shell 1 and is connected to the external pole. The pole and part of the tab are both arranged outside the outer shell 1, which can improve the utilization rate of the internal space of the battery.

[0044] The battery cell is provided with two tabs, namely a positive tab and a negative tab. The two tabs are located on the same side of the battery cell. Two first plastic parts 2 and two second plastic parts 3 are provided respectively. The two tabs are arranged corresponding to the two first plastic parts 2, and the two tabs are arranged corresponding to the two second plastic parts 3. The two first plastic parts 2 are an integral structure or a split structure, and the two second plastic parts 3 are an integral structure or a split structure. The integral structure can reduce the assembly steps, and the split structure is more flexible and can be set according to actual needs without limitation. The number of through holes V corresponding to each tab is greater than or equal to 1. By increasing the number of through holes V, the tab passes through multiple through holes V, which facilitates the tab to pass through. When positive and negative tabs are provided, the number of through holes V corresponding to the positive tab is greater than or equal to 1, and the number of through holes V corresponding to the negative tab is greater than or equal to 1. The number of through holes V corresponding to the two can be equal or different. Optionally, there are two through holes V corresponding to each tab, and the connecting column 4 is provided between two adjacent through holes V. The structure is subjected to uniform force, and the tabs are folded toward each other or away from each other from the two through holes V without overlapping each other, thereby further reducing the height.

[0045] Specifically, the side panel 11 is provided with a first connecting hole 113, the first plastic part 2 is provided with a second connecting hole 22, and the second plastic part 3 is provided with a third connecting hole 31. The first connecting hole 113, the second connecting hole 22 and the third connecting hole 31 are connected to form a through hole V. Furthermore, the three are arranged opposite each other.

[0046] Optionally, the second plastic part 3 is provided with a protrusion 32 , the third communication hole 31 is provided on the protrusion 32 , and the protrusion 32 extends into the first communication hole 113 , thereby isolating the side plate 11 and the tab.

[0047] The side panel 11 is provided with a receiving groove 112, and the first plastic part 2 is received within the receiving groove 112, reducing the overall thickness of the side panel 11 and the first plastic part 2, further reducing the overall volume. The first plastic part 2 is provided with a flange 21 on its periphery. The width of the flange 21 is L1, and the value of L1 ranges from 0-10mm. Specifically, L1 can be 0, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. A value of 0 indicates no flange 21. Excessively wide flange 21 increases the weight of the housing assembly, increases material consumption, and increases cost. A gap is provided between the outer periphery of the flange 21 and the wall of the receiving groove 112 to facilitate assembly.

[0048] The pole is provided on the first plastic part 2 to be connected to the pole ear. Optionally, the distance between the surface of the first plastic part 2 for mounting the pole and the upper surface of the shell 1 is L2, and the value range of L2 is -1 to 0.5H, wherein H is the thickness of the side panel 11 or the shell 1. Specifically, L2 can be -1, 0 or 0.5H, etc. When it is a negative value, the surface of the first plastic part 2 for mounting the pole is lower than the upper surface of the shell 1. When it is a positive value, the surface of the first plastic part 2 for mounting the pole is higher than the upper surface of the shell 1. If it is too large, it is not conducive to improving the volume utilization rate, and if it is too small, the shell strength is low.

[0049] Optionally, the shell 1 , i.e. the side plate 11 , may be provided with an explosion-proof valve 5 , and the notch on the explosion-proof valve 5 may face the inside or the outside of the shell 1 , or the explosion-proof valve 5 may not be provided.

[0050] Optionally, the housing 1 , i.e., the side plate 11 , may or may not be provided with a liquid injection port 114 . If a liquid injection port 114 is provided, it may be provided in the middle or near one side of the positive electrode or the negative electrode.

[0051] When the second plastic part 3 is an integral structure, the second plastic part 3 has corresponding avoidance holes to avoid the explosion-proof valve 5 and the injection port 114. When the first plastic part 2 is an integral structure, the first plastic part 2 has corresponding avoidance structures to avoid the explosion-proof valve 5 and the injection port 114.

[0052] A battery comprises a cell and the aforementioned housing assembly, wherein the cell is housed within a housing 1 of the housing assembly. The use of the aforementioned housing assembly can reduce assembly difficulty. Optionally, the bottom of the housing 1 is open, and after the cell, second plastic component 3, and other related structures are installed, a cover plate is welded to the housing 1 to seal the opening.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A housing assembly, characterized in that: include: A housing (1), the housing (1) comprising a side plate (11), the side plate (11) being provided with a through hole (111); a first plastic part (2) and a second plastic part (3), wherein the first plastic part (2) is arranged outside the housing (1), and the second plastic part (3) is arranged inside the housing (1), and the first plastic part (2) and the second plastic part (3) are arranged on both sides of the side panel (11); A connecting column (4), wherein the connecting column (4) is passed through the through hole (111), and two ends thereof are respectively connected to the first plastic part (2) and the second plastic part (3).

2. The housing assembly according to claim 1, wherein: The connecting column (4) is integrally connected to the first plastic part (2), and the connecting column (4) is connected to the second plastic part (3) by hot melting or hot riveting; and / or The connecting column (4) is integrally connected to the second plastic part (3), and the connecting column (4) is connected to the first plastic part (2) by hot melting or hot riveting.

3. The housing assembly according to claim 2, wherein: The connecting column (4) is provided with an end cap (41); when the connecting column (4) is connected to the second plastic part (3) by hot melting or hot riveting, the second plastic part (3) is provided with a first sink groove, and the end cap (41) is provided in the first sink groove; when the connecting column (4) is connected to the first plastic part (2) by hot melting or hot riveting, the first plastic part (2) is provided with a second sink groove (23), and the end cap (41) is provided in the second sink groove (23).

4. The housing assembly according to claim 1, wherein: The number of the connecting columns (4) is greater than or equal to 1.

5. The housing assembly according to claim 1, wherein: The side plate (11) is provided with a receiving groove (112), the first plastic part (2) is received in the receiving groove (112), and a flange edge (21) is provided on the circumference of the first plastic part (2), and the width of the flange edge (21) is 0-10 mm.

6. The housing assembly according to any one of claims 1 to 5, characterized in that: The housing (1) is used to accommodate a battery cell, the battery cell is provided with a tab, the side plate (11) faces the tab, the first plastic part (2), the side plate (11) and the second plastic part (3) form a through hole (V), and the tab passes through the through hole (V) to extend outside the housing (1) and connect to an external pole.

7. The housing assembly according to claim 6, wherein: The battery cell is provided with two tabs, and the two tabs are located on the same side of the battery cell. Two of the first plastic parts (2) and two of the second plastic parts (3) are provided respectively. The two tabs are arranged correspondingly to the two first plastic parts (2), and the two tabs are arranged correspondingly to the two second plastic parts (3). The two first plastic parts (2) are an integrated structure or a split structure, and the two second plastic parts (3) are an integrated structure or a split structure.

8. The housing assembly according to claim 6, wherein: The number of the through holes (V) is greater than or equal to one.

9. The housing assembly according to claim 8, wherein: There are two through holes (V), and the connecting column (4) is arranged between two adjacent through holes (V).

10. A battery, characterized in that: The invention comprises a battery core and a shell assembly according to any one of claims 1 to 9, wherein the battery core is accommodated in a shell (1) of the shell assembly.

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