Shell assembly, battery cell and power device
By incorporating connecting plates and coaxial through-hole structures in the housing assembly, the problem of low internal space utilization in power batteries is solved, resulting in improved battery energy density and safety, and simplified assembly process.
Patent Information
- Application Number
- CN202520292753.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In existing technologies, the internal space utilization rate of power batteries is low, resulting in insufficient energy density, which affects driving range and service life.
A housing assembly is designed to reduce the height of the pole and improve space utilization by setting a connecting piece between the lower surface of the pole and the lower plastic. The assembly is simplified by using a coaxial arrangement of through holes and connecting holes, which also increases stability and safety.
It increases the volumetric energy density of the battery, improves the battery's safety and stability, simplifies the assembly process, and optimizes the utilization of internal space.
Smart Images
Figure CN223583059U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a housing assembly, a battery cell, and a power unit. Background Technology
[0002] Related technologies indicate that with the increasing pressure of the energy crisis and environmental protection, the new energy vehicle industry has become a frontier in promoting the transformation and upgrading of the automotive industry. As the heart of new energy vehicles, the driving range and lifespan of power batteries are currently the focus of industry attention, and consumers have higher expectations and requirements for the performance indicators and quality levels of this key component. Therefore, developing power batteries with higher energy density has become an important problem that urgently needs to be solved. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a housing assembly that can improve the utilization rate of internal space.
[0004] This utility model also proposes a battery cell having the above-mentioned housing assembly.
[0005] This utility model also proposes a power device having the above-mentioned battery cell.
[0006] According to a first aspect of the present invention, a housing assembly is provided for accommodating an electrode assembly. The housing assembly includes: a housing body having a receiving cavity formed therein, the electrode assembly being disposed within the housing body, an explosion-proof hole being formed at the top of the housing body, and first through holes being formed on both sides of the explosion-proof hole; an electrode post being disposed on the housing body and electrically connected to the electrode assembly; a lower plastic being disposed at the top of the housing body and located within the receiving cavity; and a connecting piece being disposed between the lower plastic and the electrode assembly, wherein the top surface of the connecting piece at the location of the first through holes is located between the upper surface of the electrode post and the lower surface of the lower plastic.
[0007] According to the housing assembly of this utility model, by placing a portion of the connecting piece located at the first through hole between the lower surface of the electrode post and the lower surface of the lower plastic, the height of the electrode post is reduced, the internal space utilization of the housing assembly is improved, thereby increasing the volumetric energy density of the battery.
[0008] In some embodiments, the connecting piece includes a first connecting portion and a second connecting portion connected together, the second connecting portion being connected to the pole post, the first connecting portion being connected to the pole tab of the pole group, and the first connecting portion being located within the first through hole.
[0009] In some embodiments, the lower plastic is formed with a second through hole, the first through hole and the second through hole are coaxially arranged, and the first connecting part is located in the first through hole and the second through hole.
[0010] In some embodiments, a first connecting hole is formed on a side of the first through hole away from the explosion-proof hole, the first connecting hole is spaced apart from the first through hole, the lower plastic is formed with a second connecting hole, the first connecting hole and the second connecting hole are coaxially arranged, the second connecting part is formed as a connecting column, the connecting column extends into the first connecting hole and the second connecting hole and is connected with the pole column.
[0011] In some embodiments, a groove is formed on the circumference of the first connecting hole, and the lower end of the pole column is arranged in the groove.
[0012] In some embodiments, the shell assembly further comprises a sealing ring arranged on the circumferential wall of the first connecting hole and located between the pole column and the shell body, and an upper plastic arranged around the circumference of the pole column.
[0013] In some embodiments, the shell assembly further comprises an explosion-proof valve arranged on the shell body and covering the position of the explosion-proof hole, and a protective film arranged on the explosion-proof valve and covering the explosion-proof valve.
[0014] In some embodiments, the lower plastic is formed with a ventilation area located between the two second through holes, and the ventilation area is arranged corresponding to the explosion-proof valve.
[0015] The battery monomer according to the second aspect of the utility model comprises a pole group and the shell assembly according to the first aspect of the utility model, the pole group is arranged in the accommodating cavity of the shell assembly and is electrically connected with the pole column of the shell assembly.
[0016] The battery monomer according to the utility model has the advantages that the shell assembly of the first aspect is arranged, so that the energy density of the battery monomer is improved, and the safety of the battery monomer is improved.
[0017] The power device according to the third aspect of the utility model comprises the battery monomer according to the second aspect of the utility model.
[0018] The power device according to the utility model has the advantages that the battery monomer of the second aspect is arranged, so that the overall performance of the power device is improved, and the safety of the power device is improved.
[0019] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 is a schematic view of a battery cell according to an embodiment of the present application;
[0021] Figure 2 is Figure 1 is an exploded schematic view of the housing assembly shown in
[0022] Figure 3 is Figure 2 is an assembled schematic view of the housing assembly from another perspective shown in
[0023] Figure 4 is Figure 1 is a schematic view of the battery cell from another perspective shown in
[0024] Figure 5 is Figure 4 is a schematic view of the battery cell A-A cross section shown in
[0025] Figure 6 is Figure 4 is a schematic view of the battery cell B-B cross section shown in
[0026] REFERENCE NUMERALS:
[0027] 100, battery cell; 1, housing assembly; 11, housing body; 111, explosion-proof hole; 112, first through hole; 113, first connecting hole; 114, sink groove; 12, pole post; 13, lower plastic; 131, second through hole; 132, second connecting hole; 133, air passage area; 14, connecting sheet; 141, first connecting part; 142, second connecting part; 15, sealing ring; 16, explosion-proof valve; 17, upper plastic; 18, protective film; 2, pole group; 21, pole tab. DETAILED DESCRIPTION
[0028] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.
[0029] The housing assembly 1 according to the first aspect of the present application will be described below with reference to Figures 1-6 As shown in
[0030] Figures 1-6 According to the first aspect of the present application, the housing assembly 1 includes a housing body 11, a pole post 12, a lower plastic 13, and a connecting sheet 14.
[0031] Specifically, the shell assembly 1 is used for accommodating the pole group 2, the shell body 11 is formed with an accommodating cavity, the pole group 2 is arranged in the shell body 11, the top of the shell body 11 is formed with an explosion-proof hole 111, both sides of the explosion-proof hole 111 are formed with a first through hole 112, the pole column 12 is arranged on the shell body 11 and is electrically connected with the pole group 2, the lower plastic 13 is arranged on the top of the shell body 11 and is located in the accommodating cavity, the connecting piece 14 is arranged between the lower plastic 13 and the pole group 2, and the top surface of the part of the connecting piece 14 located at the position of the first through hole 112 is located between the upper surface of the pole column 12 and the lower surface of the lower plastic 13. It can be understood that the connecting piece 14 is not in the same plane, the connecting piece 14 has a bending towards the direction of the first through hole 112, and the part of the connecting piece 14 of the bending is located between the upper surface of the pole column 12 and the lower surface of the lower plastic 13, so that the good electrical contact is ensured, and the compactness and safety of the overall structure of the shell assembly 1 are ensured.
[0032] According to the shell assembly 1 provided in the embodiment of the utility model, the part of the connecting piece 14 located at the position of the first through hole 112 is arranged between the lower surface of the pole column 12 and the lower surface of the lower plastic 13, the height of the pole column 12 is reduced, the internal space utilization rate of the shell assembly 1 is improved, and the battery volume energy density is improved.
[0033] In some embodiments of the utility model, as shown in Figure 2 The connecting piece 14 comprises a first connecting part 141 and a second connecting part 142 connected with each other, the second connecting part 142 is connected with the pole column 12, the first connecting part 141 is connected with the tab 21 of the pole group 2, and the first connecting part 141 is located in the first through hole 112. It can be understood that the second connecting part 142 is connected with the pole column 12, the second connecting part 142 is sleeved on the pole column 12, the overall height of the position of the pole column 12 is reduced, the first connecting part 141 is connected with the tab 21, and the welding operation of the tab 21 and the first connecting part 141 of the connecting piece can be performed by the assembly personnel through the first through hole 112, so that the assembly difficulty is reduced.
[0034] In some embodiments of the utility model, the lower plastic 13 is formed with a second through hole 131, the first through hole 112 and the second through hole 131 are coaxially arranged, and the first connecting part 141 is located in the first through hole 112 and the second through hole 131. Therefore, the structure of the lower plastic 13 and the shell body 11 is simple, assembly is facilitated, and the stability and safety of the battery monomer 100 are improved.
[0035] In some embodiments of the utility model, as shown in Figure 1 And Figure 2As shown, the first through hole 112 is formed with a first connecting hole 113 away from one side of the explosion-proof hole 111, and the first connecting hole 113 is arranged in a spaced manner with the first through hole 112, the lower plastic 13 is formed with a second connecting hole 132, the first connecting hole 113 and the second connecting hole 132 are coaxially arranged, and the second connecting part 142 is formed as a connecting column which extends into the first connecting hole 113 and the second connecting hole 132 and is connected with the pole column 12. Therefore, the stability and reliability of the battery monomer 100 are improved, the assembly process of the battery monomer 100 is simplified, the mechanical stability inside the battery is improved, the space utilization inside the shell body 11 is optimized, and a more compact design is realized.
[0036] In some embodiments of the utility model, the circumferential direction of the first connecting hole 113 is formed with a groove 114, and the lower end of the pole column 12 is arranged in the groove 114. Therefore, the groove 114 is arranged to facilitate the assembly of the pole column 12, reduce the height at the position of the pole column 12, increase the contact area between the pole column 12 and the shell assembly 1, and improve the safety and stability.
[0037] In some embodiments of the utility model, as shown in the figure, Figure 2 The shell assembly 1 further comprises a sealing ring 15 arranged on the circumferential wall of the first connecting hole 113 and located between the pole column 12 and the shell body 11, and an upper plastic 17 arranged around the circumferential direction of the pole column 12. Therefore, the sealing ring 15 and the upper plastic 17 jointly form an effective barrier to prevent external substances from entering and internal electrolyte from leaking, improve the safety and durability of the battery, improve the insulation, and ensure the safety of the battery during operation.
[0038] In some embodiments of the utility model, as shown in the figure, Figure 2 The shell assembly 1 further comprises an explosion-proof valve 16 arranged on the shell body 11 and covering the position of the explosion-proof hole 111, and a protective film 18 arranged on the explosion-proof valve 16 and covering the explosion-proof valve 16. Therefore, the shell assembly 1 has a simple structure, is easy to assemble, reduces the difficulty of assembly, and ensures the safe operation of the battery.
[0039] In some embodiments of the utility model, as shown in the figure, Figure 3 The lower plastic 13 is formed with a ventilation area 133 located between the two second through holes 131, and the ventilation area 133 is arranged in correspondence with the explosion-proof valve 16. Therefore, when the battery is in thermal runaway, high-temperature gas flows out of the shell assembly 1 through the explosion-proof valve 16 through the ventilation area 133, ensuring the safety of the battery.
[0040] According to the battery monomer 100 of the second aspect of the utility model, including pole group 2 and the shell assembly 1 according to the first aspect of the utility model described above, pole group 2 is located in the accommodating cavity of shell assembly 1 and is electrically connected with the pole 12 of shell assembly 1.
[0041] According to the battery monomer 100 of the utility model embodiment, by setting the shell assembly 1 of the above first aspect embodiment, the energy density of the battery monomer 100 is improved, and the safety of the battery monomer 100 is improved.
[0042] According to the power device of the third aspect of the utility model, including the battery monomer 100 according to the second aspect of the utility model described above.
[0043] According to the power device of the utility model embodiment, by setting the battery monomer 100 of the above second aspect embodiment, the overall performance of the power device is improved, and the safety of the power device is improved.
[0044] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as a limitation on the utility model.
[0045] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0046] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0047] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.
[0048] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the claims and their equivalents.
Claims
1. A housing assembly, characterized in that, For accommodating the electrode assembly, the housing assembly includes: The shell body has a receiving cavity formed within it, the electrode assembly is disposed within the shell body, an explosion-proof hole is formed at the top of the shell body, and first through holes are formed on both sides of the explosion-proof hole. The electrode post is disposed on the housing body and is electrically connected to the electrode group. The lower plastic is disposed on the top of the shell body and located within the receiving cavity; A connecting piece is disposed between the lower plastic and the electrode assembly, with the top surface of the connecting piece located at the position of the first through hole situated between the upper surface of the electrode post and the lower surface of the lower plastic.
2. The housing assembly according to claim 1, characterized in that, The connecting piece includes a first connecting part and a second connecting part connected together. The second connecting part is connected to the pole post, and the first connecting part is connected to the pole lug of the pole group. The first connecting part is located in the first through hole.
3. The housing assembly according to claim 2, characterized in that, The lower plastic has a second through hole, the first through hole and the second through hole are corresponding and coaxially arranged, and the first connecting part is located in the first through hole and the second through hole.
4. The housing assembly according to claim 3, characterized in that, A first connecting hole is formed on the side of the first through hole away from the explosion-proof hole, and the first connecting hole and the first through hole are arranged at intervals. A second connecting hole is formed on the lower plastic. The first connecting hole and the second connecting hole correspond to each other and are coaxially arranged. The second connecting part is formed as a connecting post. The connecting post extends into the first connecting hole and the second connecting hole and is connected to the pole post.
5. The housing assembly according to claim 4, characterized in that, A groove is formed around the first connecting hole, and the lower end of the pole is located in the groove.
6. The housing assembly according to claim 5, characterized in that, Also includes: A sealing ring is disposed on the peripheral wall of the first connecting hole and located between the pole post and the shell body; The upper plastic is arranged circumferentially around the pole post.
7. The housing assembly according to claim 6, characterized in that, Also includes: An explosion-proof valve is disposed on the shell body and covers the position of the explosion-proof hole; A protective film is disposed on the explosion-proof valve and covers the explosion-proof valve.
8. The housing assembly according to claim 7, characterized in that, The lower plastic has a ventilation area located between the two second through holes, and the ventilation area is correspondingly arranged with the explosion-proof valve.
9. A single battery cell, characterized in that, include: The electrode assembly and the housing assembly according to any one of claims 1-8, wherein the electrode assembly is disposed within the receiving cavity of the housing assembly and is electrically connected to the electrode post of the housing assembly.
10. A power unit, characterized in that, Includes the battery cell as described in claim 9.