Half-amplitude pole, battery cell shell and battery
By designing a half-width pole column, the positional relationship between the pole column head and the liquid injection hole is optimized, and the problem of complex structure and large space occupancy in the existing technology is solved, and effective balance load in the fields of thin, narrow and long battery cells is achieved. The relationship between traffic and space consumption.
Patent Information
- Application Number
- CN202323498321.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-20
AI Technical Summary
In the prior art, the polar column structure is complex and the space occupies a large amount of space, and is not suitable for thin, narrow and long battery cells.
A half-width pole column is designed, including a pole head, a column and a gasket. The distance between the pole head near one side edge of the fluid injection hole and the fluid injection hole is 30% to 40% of the length of the top surface of the battery cell shell. The distance between the edge of the side away from the injection hole and the edge of the cell housing is 15% to 25% of the length of the top surface of the cell housing.
It effectively reduces the space occupied by the pole pin on the length of the battery cell, balances the relationship between current carrying capacity and space occupied, and is suitable for thin, narrow and long battery cell fields.
Smart Images
Figure CN222440808U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a half-width pole, a battery core shell and a battery. Background Art
[0002] The battery cell pole refers to the part where the positive and negative poles inside the battery are connected to the external circuit. The pole inside the battery is usually made of metal material. The existing pole structure is complex and requires a large space, which is not suitable for the field of thin, narrow and long batteries.
[0003] Therefore, it is very important for those skilled in the art to design a half-width pole, a cell housing and a battery with a simple structure and small space occupation. Utility Model Content
[0004] The technical problem to be solved by the embodiments of the utility model is to provide a half-width pole, a battery cell housing and a battery with a simple structure and small space occupation, so as to solve the problem that the prior art has a complex structure and requires a large space and is not suitable for the field of thin, narrow and long batteries.
[0005] The utility model discloses a half-width pole, which is used on a battery shell with a liquid injection hole. The scheme is that it comprises: a pole head, a column and a gasket, one end of the column is connected to the pole head, the other end of the column passes through the top surface of the battery shell and extends to the inside of the battery shell, and the pole head is abutted against the outer surface of the top surface of the battery shell, the gasket is arranged inside the top surface of the battery shell and connected to the column; the distance between the edge of one side of the pole head close to the liquid injection hole and the liquid injection hole is 30% to 40% of the length of the top surface of the battery shell; the distance between the edge of one side of the pole head away from the liquid injection hole and the edge of the same side of the battery shell is 15% to 25% of the length of the top surface of the battery shell.
[0006] Optionally, the top surface of the column is connected to the bottom surface of the pole head, and the area of the top surface of the column is smaller than the area of the bottom surface of the pole head.
[0007] Optionally, a side of the pole head close to the liquid injection hole is a rectangular surface, and a side of the pole head away from the liquid injection hole is an arc surface.
[0008] The utility model also provides a battery cell casing, wherein the battery cell casing comprises the above-mentioned half-width pole and shell, the shell comprises a lower shell and a shell cover, the shell cover covers the lower shell, and the half-width pole is arranged on the top surface of the lower shell.
[0009] Optionally, a liquid injection hole is further provided on the top surface of the lower shell, and the liquid injection hole is provided on one side of the pole head, and a distance between the liquid injection hole and the top surface of the lower shell away from the side of the pole head is greater than or equal to 2 mm.
[0010] Optionally, a first insulating rubber layer is provided between the pole head and the lower shell, and a first avoidance hole for avoiding the column is provided on the first insulating rubber layer.
[0011] Optionally, the first insulating rubber layer is arranged in a first direction of the pole head, and a projection of the first insulating rubber layer in the first direction completely covers a projection of the pole head in the first direction.
[0012] Optionally, a second insulating rubber layer is provided between the gasket and the lower shell, and a second avoidance hole for avoiding the column is provided on the second insulating rubber layer.
[0013] Optionally, the second insulating adhesive layer is arranged in the second direction of the gasket, and the projection of the second insulating adhesive layer in the second direction completely covers the projection of the gasket in the second direction.
[0014] The utility model also provides a battery, which comprises the above-mentioned half-width pole, a shell and a battery cell, wherein the half-width pole is arranged on the shell, and the battery cell is arranged inside the shell.
[0015] Compared with the prior art, the beneficial effect of the half-width pole provided by the embodiment of the utility model is that: by designing a half-width pole, by setting the distance between the edge of the side of the pole head close to the injection hole and the injection hole to 30% to 40% of the length of the top surface of the battery cell shell; and setting the distance between the edge of the side of the pole head away from the injection hole and the edge of the same side of the battery cell shell to 15% to 25% of the length of the top surface of the battery cell shell, the space occupied by the entire pole head on the length of the battery cell can be effectively reduced. For thin, narrow and long battery cells, while keeping the injection hole and the positive pole on the same plane, the half-width pole can effectively balance the relationship between current carrying capacity and occupied space to meet the needs of relevant products in the market. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0017] In the figure:
[0018] Figure 1 This is a schematic diagram of the structure of the half-width pole provided by the embodiment of the utility model. Figure 1 ;
[0019] Figure 2 This is a schematic diagram of the structure of the half-width pole provided by the embodiment of the utility model. Figure 2 ;
[0020] Figure 3It is a schematic diagram of the structure of the battery cell housing provided by an embodiment of the utility model;
[0021] Figure 4 It is a structural schematic diagram of the lower shell provided by an embodiment of the utility model;
[0022] Figure 5 It is a schematic diagram of the structure of a battery provided by an embodiment of the utility model. DETAILED DESCRIPTION
[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.
[0024] like Figure 1 and Figure 2 As shown, the utility model provides a specific embodiment of a half-width pole.
[0025] A half-width pole, reference Figure 1 and Figure 2 The half-width pole includes a pole head 11, a column 12 and a gasket 13. One end of the column 12 is connected to the pole head 11, and the other end of the column 12 passes through the battery cell housing 2 and extends to the inside of the battery cell housing 2, so that the pole head 11 is against the outer surface of the battery cell housing 2. The gasket 13 is arranged inside the battery cell housing 2 and connected to the column 12.
[0026] Among them, the distance between the edge of the pole head on one side close to the injection hole and the injection hole is 30% to 40% of the length of the top surface of the battery cell shell; the distance between the edge of the pole head on one side away from the injection hole and the edge of the same side of the battery cell shell is 15% to 25% of the length of the top surface of the battery cell shell.
[0027] Specifically, the pole refers to the metal columnar component used to connect the positive and negative poles of the battery in a battery or battery pack. The positive and negative poles are usually completed by welding or pressing to ensure good current conduction and stability. The pole is usually made of materials with good conductive properties. The pole is generally set on the battery cell casing and can connect the internal and external circuits of the battery.
[0028] In this embodiment, reference Figure 1 and Figure 2The pole head 11 is mainly used to connect the external circuit, the gasket 13 is mainly used to connect to the inside of the battery, the column 12 is mainly used to connect the pole head 11 and the gasket 13, one end of the column 12 is fixedly connected to the pole head 11, and can be specifically a fixed assembly or an integrated design, the other end of the column 12 can pass through the battery cell shell 2 and extend to the inside of the battery cell, when the other end of the column 12 passes through the battery cell shell 2 and extends to the inside of the battery cell, the pole head 11 can be attached to the outer surface of the battery cell shell 2, and the connection line of the external circuit can be connected between the pole head 11 and the battery cell shell 2, so as to achieve the connection with the external circuit; the gasket 13 is arranged inside the battery cell shell 2, and the gasket 13 can be sleeved on the column 12 and attached to the inner surface of the battery cell shell 2 for connecting to the inside of the battery.
[0029] Further, refer to Figure 1 and Figure 2 One end of the pole head 11 is an arcuate surface 111, and the other end of the pole head 11 is a rectangular surface 112 to form a half-width pole; the rectangular surface 112 is the side close to the injection hole, and the arcuate surface 111 is the side away from the injection hole; by setting one end of the pole head 11 as the arcuate surface 111, it is mainly used to ensure that the pole head 11 occupies a smaller area while ensuring sufficient current, and by setting the other end of the pole head 11 as the rectangular surface 112, it is mainly used to effectively reduce the space occupied by the pole in the length direction of the battery cell, so as to achieve that under the premise of ensuring sufficient current, the pole head 11 not only occupies a small area but also occupies a small space in the length direction of the battery cell.
[0030] For thin, narrow and long battery cells, the injection hole 212 and the positive electrode can only be arranged side by side on the length of the battery cell while keeping the injection hole 212 on the same plane as the positive electrode. In this way, the space occupied by the electrode head 11 on the length of the battery cell is relatively high. It cannot be too long in the direction of the battery cell length, otherwise it will easily affect the design of the injection hole 212 and thus affect the injection of the battery cell. For narrow battery cells, there is not enough space for the electrode on the width of the battery cell. Moreover, the area of the electrode cannot be too small, otherwise it will easily carry insufficient current. By setting the distance between the edge of one side of the electrode head close to the injection hole and the injection hole to 30% to 40% of the length of the top surface of the battery cell shell; the distance between the edge of one side of the electrode head away from the injection hole and the edge of the same side of the battery cell shell to 15% to 25% of the length of the top surface of the battery cell shell, a better balance is achieved between the current carrying capacity of the electrode and the space it occupies.
[0031] In this embodiment, by setting the distance between the edge of the pole head on one side close to the injection hole and the injection hole to 30% to 40% of the length of the top surface of the battery cell shell; and setting the distance between the edge of the pole head on one side away from the injection hole and the edge of the same side of the battery cell shell to 15% to 25% of the length of the top surface of the battery cell shell, the space occupied by the entire pole head on the length of the battery cell can be effectively reduced. For thin, narrow, and long battery cells, while keeping the injection hole and the positive pole on the same plane, the half-width pole can effectively balance the relationship between current carrying capacity and occupied space to meet the needs of relevant products in the market.
[0032] Among them, reference Figure 1 The pole head 11, the column 12 and the gasket 13 are connected by steel shell passivation and thermal composite connection.
[0033] Specifically, steel shell passivation is an existing surface treatment technology used to improve the corrosion resistance and oxidation resistance of steel materials. The main purpose of steel shell passivation is to form a dense oxide or compound layer to prevent the steel from contacting oxygen, water and other corrosive substances in the external environment, thereby slowing down the corrosion rate of the steel; thermal bonding is also an existing technology for connecting materials, which firmly bonds two or more materials together through the action of heat bonding pressure. Compared with the existing riveting method, steel shell passivation and thermal bonding can make the pole more consistent and the performance more stable.
[0034] In one embodiment, reference Figure 1 The top surface of the column 12 is connected to the bottom surface of the pole head 11 , and the area of the top surface of the column 12 is smaller than the area of the bottom surface of the pole head 11 .
[0035] Specifically, refer to Figure 1 and Figure 2 The top surface of the column 12 is connected to the bottom surface of the pole head 11, and the top surface area of the column 12 is smaller than the bottom surface area of the pole head 11. The bottom surface area of the pole is generally set to be adapted to the area of the pole hole 211 on the battery cell housing 2. When the column 12 passes through the battery cell housing 2 and extends to the inside of the battery cell housing 2, the area of the pole head 11 needs to be larger than the area of the pole hole 211, so that the bottom surface of the pole head 11 abuts against the outer surface of the battery cell housing 2 and covers the pole hole 211 on the battery cell housing 2.
[0036] In one embodiment, reference Figure 1 One end of the gasket 13 is an arcuate surface (the same as the arcuate surface 111 of the pole head 11), and the other end of the gasket 13 is a rectangular surface (the same as the rectangular surface 112 of the pole head 11). The arcuate surface of the gasket 13 corresponds to the arcuate surface 111 of the pole head 11, and the rectangular surface of the gasket 13 corresponds to the rectangular surface 112 of the pole head 11.
[0037] Specifically, refer to Figure 1 and Figure 2 The shape and area of the gasket 13 are consistent with those of the pole head 11, one end of the gasket 13 is also an arcuate surface (the same as the arcuate surface 111 of the pole head 11), and the other end of the gasket 13 is a rectangular surface (the same as the rectangular surface 112 of the pole head 11). When the column 12 passes through the battery cell housing 2 and extends to the inside of the battery cell housing 2, the gasket 13 is inserted into the pole, and the arcuate surface of the gasket 13 corresponds to the arcuate surface 111 of the pole head 11, and the rectangular surface of the gasket 13 corresponds to the rectangular surface 112 of the pole head 11, so as to reduce the occupied area of the entire pole.
[0038] like Figure 3 and Figure 4 As shown, the utility model also provides a specific embodiment of a battery cell casing.
[0039] A battery cell casing, reference Figure 3 The battery cell casing includes the above half-width pole and shell, the shell includes a lower shell 21 and a shell cover 22, the shell cover 22 covers the lower shell 21, and the half-width pole is arranged on the top surface of the lower shell 21.
[0040] Specifically, refer to Figure 3 The lower shell 21 includes four sides, and the shell cover 22 covers the lower shell 21. The four sides of the shell cover 22 can be fixed to the four sides of the lower shell 21 respectively to form a sealed accommodating cavity; the half-width pole is arranged on one side of the lower shell 21 to connect the internal and external circuits of the battery.
[0041] In one embodiment, reference Figure 4 The top surface of the lower shell 21 is provided with a pole hole 211 for avoiding the column 12 . The column 12 passes through the pole hole 211 and is fixed by the pole head 11 and the gasket 13 .
[0042] Specifically, refer to Figure 4 A pole hole 211 is provided on a top surface of the lower shell 21 for mounting the pole, which is mainly used to avoid the column 12 on the pole. When the pole is installed, the pole is extended through the top surface of the lower shell 21 to the accommodating cavity in the lower shell 21, and the pole head 11 is abutted against the outer surface of the top surface of the lower shell 21 and covers the pole hole 211, and then the gasket 13 is connected to the pole, and the connected gasket 13 will abut against the inner surface of the top surface of the lower shell 21.
[0043] In one embodiment, reference Figure 4 A liquid injection hole 212 is also provided on the lower shell 21. The liquid injection hole 212 and the pole hole 211 are arranged on the same top surface of the lower shell 21, and the liquid injection hole 212 is arranged on the side of the rectangular surface 112 close to the pole head 11. The distance between the liquid injection hole 212 and the top surface of the lower shell 21 away from the pole head 11 is greater than or equal to 2 mm.
[0044] Specifically, refer to Figure 4 The injection hole 212 is mainly used to inject electrolyte into the battery. The electrolyte is an important component in the battery. It provides a medium for charge transfer and participates in electrochemical reactions. In order to ensure the normal operation and stable performance of the battery, an injection hole 212 will be set on the battery shell 2 in the battery design, and the injection hole 212 will be set on the same side of the battery shell 2 as the positive electrode of the battery. In this embodiment, the injection hole 212 and the electrode are both set on the same top surface of the lower shell 21, and the injection hole 212 is set on the side of the rectangular surface 112 close to the electrode head 11. Since this side of the electrode head 11 is the rectangular surface 112, and the distance between the injection hole 212 and the top surface of the lower shell 21 away from the side of the electrode head 11 is greater than or equal to 2 mm, the injection hole 212 can be better avoided in the length direction of the battery shell 2 to provide more injection space; thereby completing the production process of battery shell entry-detection.
[0045] In one embodiment, reference Figure 3 A first insulating rubber layer 3 is provided between the pole head 11 and the lower shell 21 , and a first avoidance hole for avoiding the column 12 is provided on the first insulating rubber layer 3 .
[0046] Specifically, refer to Figure 3 The first insulating rubber layer 3 is specifically a PP rubber layer, and the first insulating rubber layer 3 is mainly used to separate the positive electrode and the negative electrode; the first insulating rubber layer 3 is arranged in the first direction of the pole head 11, and the projection of the first insulating rubber layer 3 in the first direction completely covers the projection of the pole head 11 in the first direction, which is mainly to completely isolate the pole head 11 from the shell to avoid short circuit, thereby improving the safety performance of the battery cell.
[0047] In one embodiment, reference Figure 3 A second insulating rubber layer 4 is provided between the gasket 13 and the lower shell 21 , and a second avoidance hole for avoiding the column 12 is provided on the second insulating rubber layer 4 .
[0048] Specifically, refer to Figure 3 The second insulating rubber layer 4 is specifically a PP rubber layer, and its purpose is the same as that of the first insulating rubber layer 3, which is used to separate the positive electrode and the negative electrode. The second insulating rubber layer 4 is arranged in the second direction of the gasket 13, and the projection of the second insulating rubber layer 4 in the second direction completely covers the projection of the gasket 13 in the second direction. It is also to completely isolate the pole head 11 from the shell to avoid short circuit, thereby improving the safety performance of the battery cell.
[0049] like Figure 5 As shown, the utility model also provides a specific embodiment of a battery cell casing.
[0050] A battery, reference Figure 5The battery includes the half-width pole 10 as described above, and also includes a shell 20 and a battery cell 30. The half-width pole 10 is arranged on the shell 20, and the battery cell 30 is arranged inside the shell 20; and a portion of the half-width pole 10 extends to the inside of the shell 20 to be connected to the battery cell 30, and another portion of the half-width pole 10 is exposed outside the shell 20 for connection to an external circuit, and the portion of the half-width pole 10 extending to the inside of the shell 20 is completely insulated from the portion exposed outside the shell 20.
[0051] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.
Claims
1. A half-width pole, used on a battery cell housing with a liquid injection hole, characterized in that: include: A pole head, a column and a gasket, wherein one end of the column is connected to the pole head, and the other end of the column passes through the top surface of the battery cell shell and extends to the inside of the battery cell shell, so that the pole head is against the outer surface of the top surface of the battery cell shell, and the gasket is arranged inside the top surface of the battery cell shell and connected to the column; the distance between the edge of one side of the pole head close to the injection hole and the injection hole is 30% to 40% of the length of the top surface of the battery cell shell; the distance between the edge of one side of the pole head away from the injection hole and the edge of the same side of the battery cell shell is 15% to 25% of the length of the top surface of the battery cell shell.
2. The half-width pole according to claim 1, characterized in that: The top surface of the column is connected to the bottom surface of the pole head, and the area of the top surface of the column is smaller than the area of the bottom surface of the pole head.
3. The half-width pole according to claim 1, characterized in that: The side of the pole head close to the liquid injection hole is a rectangular surface, and the side of the pole head away from the liquid injection hole is an arc surface.
4. A battery cell casing, characterized in that: The battery cell casing comprises a half-width pole and a shell as described in any one of claims 1 to 3, wherein the shell comprises a lower shell and a shell cover, wherein the shell cover covers the lower shell, and the half-width pole is arranged on the top surface of the lower shell.
5. The battery cell casing according to claim 4, characterized in that: The top surface of the lower shell is also provided with a liquid injection hole, which is arranged on one side of the pole head, and the distance between the liquid injection hole and the top surface of the lower shell away from the side of the pole head is greater than or equal to 2 mm.
6. The battery cell casing according to claim 4, characterized in that: A first insulating rubber layer is arranged between the pole head and the lower shell, and a first avoidance hole for avoiding the column is arranged on the first insulating rubber layer.
7. The battery cell casing according to claim 6, characterized in that: The first insulating rubber layer is arranged in a first direction of the pole head, and a projection of the first insulating rubber layer in the first direction completely covers a projection of the pole head in the first direction.
8. The battery cell casing according to claim 4, characterized in that: A second insulating rubber layer is arranged between the gasket and the lower shell, and a second avoidance hole for avoiding the column is arranged on the second insulating rubber layer.
9. The battery cell casing according to claim 8, characterized in that: The second insulating adhesive layer is arranged in the second direction of the gasket, and the projection of the second insulating adhesive layer in the second direction completely covers the projection of the gasket in the second direction.
10. A battery, characterized in that: It comprises the half-width pole as described in any one of claims 1 to 3, and also comprises a shell and a battery cell, wherein the half-width pole is arranged on the shell, and the battery cell is arranged inside the shell.