Battery cell
By designing through holes on the conductive terminals and pole assembly and fixing the relative position with the fixtures, the high cost problems caused by additional tooling in the prior art are solved, and the simplification and cost reduction of battery production are achieved.
Patent Information
- Application Number
- CN202422307985.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-20
AI Technical Summary
During the fixing and sealing of the existing square-shell battery ceiling pole, additional compression tooling is required, resulting in higher production costs.
Conductive terminals and pole pillar components are designed. The conductive terminals are opened in different directions, and the pole pillars are also opened to form fixed through holes, and the relative positions of the fixed conductive terminals and pole pillars are inserted through the fixing member to replace the traditional press-rive and welding process.
Reduces workmanship cost investment, simplifies production steps, and reduces the complexity and cost of battery production.
Smart Images
Figure CN223167626U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and particularly to a battery cell. Background Art
[0002] With the development of the new energy industry, more and more lithium-ion square shell batteries are applied to the automotive or energy storage industries. In order to accelerate the popularization of new energy, major manufacturers are reducing the cost of batteries. However, the production process of the top cover of square shell batteries is complex and the cost is relatively high.
[0003] In the prior art, the fixing and sealing of the pole posts on the top cover of square shell batteries generally adopt riveting and welding, and both riveting and welding require a pressing tooling to fix the relative positions of the pole posts. However, the riveting and welding of the pole posts rely on additional pressing tooling, resulting in high production costs. Summary of the Utility Model
[0004] The main purpose of the utility model is to provide a battery cell, aiming to solve the technical problem that the riveting and welding of the pole posts rely on additional pressing tooling and the production cost is relatively high.
[0005] To achieve the above-mentioned utility model purpose, the utility model provides a battery cell, including a conductive terminal, a pole post assembly and a fixing member; the pole post assembly includes a pole post, the conductive terminal is provided with a first through hole for the pole post to extend into along a first direction, and a second through hole is provided along a second direction different from the first direction, the second through hole penetrates the first through hole, the pole post is provided with a third through hole along the second direction, when the pole post extends into the first through hole, the second through hole and the third through hole are communicated to form a fixing through hole for the fixing member to be inserted into, and the fixing member is used for being inserted into the fixing through hole along the second direction to fix the conductive terminal and the pole post.
[0006] Further, the fixing member includes a fixing portion, and the cross-sectional shape and cross-sectional size of the fixing portion are both adapted to the fixing through hole.
[0007] Further, the fixing member further includes a limiting portion, and the limiting portion is arranged at the end of the fixing portion.
[0008] Further, the fixing member is a metal member.
[0009] Further, the battery cell further includes a first housing, the first housing includes a bottom plate and a side plate connected to each other, and the side plate is provided with a first mounting hole for the pole post to pass through along the first direction.
[0010] Further, the battery cell further includes a second housing, the second housing is connected to the first housing and jointly forms an accommodation cavity, and a part of the pole post assembly is accommodated in the accommodation cavity.
[0011] Further, the pole column assembly further includes a current collector plate. The pole column is disposed on the current collector plate and electrically connected to the current collector plate. The current collector plate is completely received in the receiving cavity, and the pole column is partially received in the receiving cavity.
[0012] Further, the battery cell further includes a first plastic, and the first plastic is assembled between the current collector plate and the side plate.
[0013] Further, the battery cell further includes a second plastic, and the second plastic is assembled between the conductive terminal and the side plate. The second plastic is provided with a second mounting hole for the pole column to pass through along the first direction, and the position of the second mounting hole corresponds to the position of the first mounting hole.
[0014] Further, the battery cell further includes a sealing ring, and the sealing ring is sleeved on the outer wall of the pole column and is used for sealing the gap between the pole column and the side plate after the pole column extends into the first through hole.
[0015] Advantageous Effects:
[0016] For the battery cell of the present utility model, the conductive terminal is provided with a first through hole and a second through hole, and the pole column is provided with a third through hole. The first through hole allows the pole column to extend therein. The second through hole and the third through hole are both provided along the second direction. When the conductive terminal and the pole column are assembled, the pole column extends into the first through hole. After the second through hole and the third through hole are matched, a complete and communicating fixing through hole is formed. The fixing member is inserted into the fixing through hole along the second direction to fix the relative positions of the conductive terminal and the pole column. Therefore, the conductive terminal and the pole column assembly can be fixed by using the fixing member, reducing the investment in tooling costs and simplifying the production steps. Description of the Drawings
[0017] Figure 1 is a schematic structural diagram of a battery cell according to an embodiment of the present utility model;
[0018] Figure 2 is Figure 1 the cross-sectional structural diagram of the battery cell in [Figure number] along the section line A-A;
[0019] Figure 3 is Figure 2 the partial enlarged structural diagram of part III in [Figure number];
[0020] Figure 4 is an exploded structural diagram of a battery cell according to an embodiment of the present utility model;
[0021] Figure 5 is a schematic structural diagram of a conductive terminal according to an embodiment of the present utility model;
[0022] Figure 6It is a schematic structural diagram of a pole assembly according to an embodiment of the present utility model;
[0023] Figure 7 It is a schematic structural diagram of a fixing member according to an embodiment of the present utility model.
[0024] Wherein:
[0025] 100 - battery cell; 1 - first housing; 11 - bottom plate; 12 - side plate; 121 - first mounting hole; 2 - conductive terminal; 21 - first through hole; 22 - second through hole; 3 - second plastic; 31, second mounting hole; 4 - first plastic; 5 - sealing ring; 51 - annular base; 52 - annular protrusion; 6 - pole assembly; 61 - pole; 611 - third through hole; 62 - current collector plate; 7 - fixing member; 71 - fixing part; 72 - limiting part; 8 - second housing.
[0026] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners
[0027] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.
[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0031] Referring to Figures 1 to 6 , an embodiment of the present utility model provides a battery cell 100. The battery cell 100 includes a conductive terminal 2, a pole column assembly 6, and a fixing member 7. The pole column assembly 6 includes a pole column 61. The conductive terminal 2 is provided with a first through hole 21 for the pole column 61 to extend into along a first direction, and a second through hole 22 is provided along a second direction different from the first direction. The second through hole 22 penetrates the first through hole 21. The pole column 61 is provided with a third through hole 611 along the second direction. When the pole column 61 extends into the first through hole 21, the second through hole 22 and the third through hole 611 communicate to form a fixing through hole for the fixing member 7 to be inserted into. The fixing member 7 is used to be inserted into the fixing through hole along the second direction to fix the conductive terminal 2 and the pole column 61.
[0032] In this embodiment, referring to FIGS. 4 and Figure 5 , the conductive terminal 2 is an external terminal and has a plate-like structure. The conductive terminal 2 is provided with a first through hole 21 in the first direction (such as the X-axis direction shown in Figure 4 ), and the first through hole 21 is for the pole column 61 to extend into so that the conductive terminal 2 is electrically connected to the pole column 61. The conductive terminal 2 is provided with a second through hole 22 in the second direction (such as the Y-axis direction shown in Figure 4 ), and the second through hole 22 penetrates the first through hole 21. As shown in Figure 5In the illustrated embodiment, the first direction is the thickness direction of the conductive terminal 2, and the second direction is the width direction of the conductive terminal 2. At this time, the second direction is perpendicular to the first direction. In other embodiments, the second direction may not be perpendicular to the first direction, as long as it is ensured that the second through hole 22 penetrates the first through hole 21. For example, the conductive terminal 2 is provided with a first through hole 21 along the X-axis direction as shown in Figure 4 and a second through hole 22 along the Z-axis direction. The second through hole 22 penetrates the first through hole 21. The number of the first through holes 21 corresponds to the number of the pole columns 61. The pole columns 61 are positive pole columns or negative pole columns. Exemplarily, referring to Figure 2 , both the positive pole column and the negative pole column are 2. The positive pole column is installed on one side of the battery cell 100, and the negative pole column is installed on the other side of the battery cell 100. On each side, the number of the pole columns 61 is 2, and the number of the first through holes 21 is 2.
[0033] Referring to Figure 4 and Figure 6 , the pole columns 61 are provided with third through holes 611 in the second direction (such as the Y-axis direction as shown in Figure 4 ). The number of the fixing members 7 corresponds to the number of the third through holes 611. The fixing member 7 has a shaft-like structure. When the conductive terminal 2 is assembled with the pole column 61, the pole column 61 extends into the first through hole 21, and the second through hole 22 and the third through hole 611 communicate to form a fixing through hole. The fixing member 7 is inserted into the fixing through hole along the second direction to fix the relative positions of the conductive terminal 2 and the pole column 61.
[0034] For the battery cell 100 of the present utility model, the conductive terminal 2 is provided with a first through hole 21 and a second through hole 22, and the pole column 61 is provided with a third through hole 611. The first through hole 21 can allow the pole column 61 to extend into it. The second through hole 22 and the third through hole 611 are both provided along the second direction. When the conductive terminal 2 is assembled with the pole column 61, the pole column 61 extends into the first through hole 21. After the second through hole 22 and the third through hole 611 are matched, a complete and communicating fixing through hole is formed. The fixing member 7 is inserted into the fixing through hole along the second direction to fix the relative positions of the conductive terminal 2 and the pole column 61. Therefore, the fixing member 7 can be used to fix the conductive terminal 2 and the pole column assembly 6, reducing the investment in tooling costs and simplifying the production steps.
[0035] Referring to Figure 7 , in an embodiment, the fixing member 7 includes a fixing portion 71, and the cross-sectional shape and cross-sectional size of the fixing portion 71 are both adapted to the fixing through hole.
[0036] In this embodiment, both the cross-sectional shape and the cross-sectional size of the fixing part 71 are adapted to the fixing through-hole. For example, if the fixing through-hole is a circular through-hole, the cross-sectional shape of the fixing part 71 is circular; if the fixing through-hole is a rectangular through-hole, the cross-sectional shape of the fixing part 71 is rectangular. In this way, when the fixing part 71 is inserted into the fixing through-hole, the shaking of the fixing part 71 in the fixing through-hole can be reduced, so as to better fix the conductive terminal 2 and the pole post 61.
[0037] Referring to Figure 7 , in one embodiment, the fixing member 7 further includes a limiting part 72, and the limiting part 72 is arranged at the end of the fixing part 71.
[0038] In this embodiment, the fixing part 71 includes opposite ends, and the limiting part 72 can be fixedly arranged at one of the ends of the fixing part 71. When the conductive terminal 2 and the pole post 61 are assembled, one end of the fixing part 71 can be inserted into the fixing through-hole. When the limiting part 72 on the other end of the fixing part 71 abuts against the outer surface of the conductive terminal 2, the fixing part 71 stops inserting into the fixing through-hole. In this way, it can prevent the fixing part 71 from completely passing through the fixing through-hole. In other embodiments, the limiting part 72 can also be detachably arranged at both ends of the fixing part 71. When the conductive terminal 2 and the pole post 61 are assembled, one end of the fixing part 71 can be inserted into the fixing through-hole, and then the limiting parts 72 are inserted at both ends respectively. With the two ends of the fixing part 71 being limited by the two limiting parts 72 respectively, it can prevent the fixing part 71 from falling off the fixing through-hole.
[0039] In one embodiment, the fixing member 7 is a metal part.
[0040] Since the fixing member 7 is a metal part and the fixing member 7 can also conduct electricity, the setting of the fixing member 7 does not affect the current-carrying area of the pole post 61.
[0041] In one embodiment, the fixing member 7 is a metal pin.
[0042] In this embodiment, the conductive terminal 2 is provided with a first through-hole 21, and the pole post 61 is provided with a third through-hole 611. After the first through-hole 21 and the third through-hole 611 are matched, a complete pin hole is formed. The pin is inserted into the pin hole, and the relative positions of the conductive terminal 2 and the pole post 61 are fixed.
[0043] Referring to Figures 1 to 4 , in one embodiment, the battery cell 100 further includes a first housing 1, and the first housing 1 includes a bottom plate 11 and a side plate 12 which are connected to each other. The side plate 12 is provided with a first mounting hole 121 for the pole post 61 to pass through along the first direction.
[0044] In this embodiment, the number of the first mounting holes 121 corresponds to the number of the pole columns 61, so as to facilitate the assembly of the pole columns 61 on the side plate 12 of the first housing 1. Most of the pole column assembly 6 is arranged inside the first housing 1. When the conductive terminal 2 is assembled with the pole column 61, the pole column 61 extends out from the first mounting hole 121 of the side plate 12, and then extends into the first through hole 21 of the conductive terminal 2. The fixing member 7 is inserted into the fixing through hole to complete the fixation of the conductive terminal 2 and the pole column 61.
[0045] Referring to Figures 1 to 4 , in one embodiment, the battery cell 100 further includes a second housing 8, and the second housing 8 is connected to the first housing 1 to jointly form a receiving cavity, and a part of the pole column assembly 6 is received in the receiving cavity.
[0046] In this embodiment, the first housing 1 and the second housing 8 can protect the electrical components in the receiving cavity from the interference of the external environment, and improve the stability and service life of the battery cell 100.
[0047] Optionally, the second housing 8 and the first housing 1 are fixedly connected to each other by hemming or welding.
[0048] In one embodiment, the first housing 1 is a lower shell, and the second housing 8 is an upper cover.
[0049] In one embodiment, the battery cell 100 further includes a wound core, and the wound core is received in the receiving cavity and is electrically connected to the pole column assembly 6.
[0050] Referring to Figures 3 to 6 , in one embodiment, the pole column assembly 6 further includes a current collector plate 62, the pole column 61 is arranged on the current collector plate 62 and is electrically connected to the current collector plate 62, the current collector plate 62 is completely received in the receiving cavity, and a part of the pole column 61 is received in the receiving cavity.
[0051] In this embodiment, the current collector plate 62 is used to collect the current in the wound core and output it through the pole column 61, and the pole column 61 outputs through the conductive terminal 2.
[0052] Referring to Figure 3 and Figure 4 , in one embodiment, the battery cell 100 further includes a first plastic 4, and the first plastic 4 is assembled between the current collector plate 62 and the side plate 12.
[0053] In this embodiment, when the side plate 12 is made of a metal material, since the first plastic 4 is an insulating material, when the first plastic 4 is assembled between the current collector plate 62 and the side plate 12, it can prevent the current collector plate 62 from being short-circuited with the side plate 12.
[0054] Referring to Figure 3 and Figure 4, in one embodiment, the battery cell 100 further includes a second plastic 3, which is assembled between the conductive terminal 2 and the side plate 12. The second plastic 3 is provided with a second mounting hole 31 for the pole 61 to pass through along the first direction, and the position of the second mounting hole 31 corresponds to the position of the first mounting hole 121.
[0055] In this embodiment, when the side plate 12 is made of a metal material, since the second plastic 3 is an insulating material, when the second plastic 3 is assembled between the conductive terminal 2 and the side plate 12, it can prevent the conductive terminal 2 and the side plate 12 from being short-circuited. In addition, the second plastic 3 is provided with a second mounting hole 31 corresponding to the position of the first mounting hole 121. When the pole 61 is assembled with the conductive terminal 2, the pole 61 extends out from the first mounting hole 121 of the side plate 12, then extends into the second mounting hole 31 of the second plastic 3, and then extends into the first through hole 21 of the conductive terminal 2. When the fixing member 7 is inserted into the fixing through hole, the fixing of the conductive terminal 2 and the pole 61 is completed. In addition, the second plastic 3 further plays a role in further limiting the pole 61.
[0056] Refer to Figure 3 and Figure 4 , in one embodiment, the battery cell 100 further includes a sealing ring 5, which is sleeved on the outer wall of the pole 61 and is used to seal the gap between the pole 61 and the side plate 12 after the pole 61 extends into the first through hole 21.
[0057] In this embodiment, due to the assembly requirements, the diameter of the first through hole 21 is larger than the diameter of the pole 61, and there is a gap between the pole 61 and the side plate 12 after the pole 61 extends into the first through hole 21 of the side plate 12. The sealing ring 5 is sleeved on the outer wall of the pole 61 to play a sealing role between the pole 61 and the side plate 12.
[0058] Refer to Figure 3 , in one embodiment, the sealing ring 5 is a T-shaped sealing ring, and the T-shaped sealing ring includes a ring-shaped base 51 and a ring-shaped protrusion 52 that are vertically connected. After the pole 61 is assembled with the first plastic 4, the side plate 12, the second plastic 3, and the conductive terminal 2 respectively, the outer peripheral edge of the ring-shaped base 51 contacts the first plastic 4, and the outer peripheral edges of the ring-shaped protrusion 52 contact the side plate 12 and the second plastic 3 respectively, so as to play a sealing role between the pole 61 and the side plate 12.
[0059] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present invention by the same token.
Claims
1. A battery cell, characterized in that, It includes a conductive terminal, a pole column assembly and a fixing member; the pole column assembly includes a pole column, the conductive terminal is provided with a first through hole for the pole column to extend into along a first direction, and a second through hole is provided along a second direction different from the first direction, the second through hole penetrates the first through hole, the pole column is provided with a third through hole along the second direction, when the pole column extends into the first through hole, the second through hole and the third through hole communicate to form a fixing through hole for the fixing member to be inserted into, and the fixing member is used to be inserted into the fixing through hole along the second direction to fix the conductive terminal and the pole column.
2. The cell according to claim 1, wherein The fixing member includes a fixing portion, and the cross-sectional shape and cross-sectional size of the fixing portion are both adapted to the fixing through hole.
3. The battery cell according to claim 2, characterized in that, The fixing member further includes a limiting portion, and the limiting portion is arranged at the end of the fixing portion.
4. The battery cell according to claim 1, characterized in that, The fixing member is a metal member.
5. The battery cell according to any one of claims 1 to 4, characterized in that, It further includes a first housing, the first housing includes a bottom plate and a side plate connected to each other, and the side plate is provided with a first mounting hole for the pole column to pass through along the first direction.
6. The cell according to claim 5, characterized in that It further includes a second housing, the second housing is connected to the first housing and jointly forms a receiving cavity, and a part of the pole column assembly is received in the receiving cavity.
7. The battery cell according to claim 6, characterized in that, The pole column assembly further includes a current collector plate, the pole column is arranged on the current collector plate and electrically connected to the current collector plate, the current collector plate is completely received in the receiving cavity, and a part of the pole column is received in the receiving cavity.
8. The battery cell according to claim 7, wherein It further includes a first plastic, and the first plastic is assembled between the current collector plate and the side plate.
9. The battery cell according to claim 5, wherein It further includes a second plastic, the second plastic is assembled between the conductive terminal and the side plate, the second plastic is provided with a second mounting hole for the pole column to pass through along the first direction, and the position of the second mounting hole corresponds to the position of the first mounting hole.
10. The battery cell according to claim 5, wherein, It further includes a sealing ring, the sealing ring is sleeved on the outer wall of the pole column and is used to seal the gap between the pole column and the side plate after the pole column extends into the first through hole.