CN219717062U - Battery core and battery pack with same - Google Patents

Abstract

The utility model discloses a battery cell and a battery pack with the same. The battery cell includes: the shell is internally provided with a mounting cavity and comprises a first end wall, and a shell pole hole is formed in the first end wall; the pole group is arranged in the mounting cavity; the pole is electrically connected with the pole group and penetrates through the pole hole of the shell; the isolating seal comprises a sealing part and an isolating part, the sealing part is arranged at the matching part of the pole and the pole hole of the shell, the isolating part is connected with the sealing part, and the isolating part is used for insulating and isolating the pole positioned outside the pole hole of the shell from the shell. According to the battery core, the sealing part is arranged at the matching position of the pole and the pole hole of the shell, the isolating part is connected with the sealing part, and the isolating part is used for insulating and isolating the pole positioned outside the pole hole of the shell from the shell, so that the sealing effect is good, the assembly process is simplified, and the cost is reduced.

Description

Battery core and battery pack with same

Technical Field

The utility model relates to the technical field of battery packs, in particular to a battery cell and a battery pack with the same.

Background

Along with the increasing maturity of lithium ion battery technology, the power battery is widely applied to electric automobile as novel battery, and the performance and the security requirement of power battery are rising increasingly. The pole is used as an important structural member of the power battery, the pole is used for leading out an internal electrode to be connected with the outside, the sealing and insulating quality of the pole and the shell are critical to the battery performance, the pole and the shell are insulated by adopting an upper plastic part and a lower plastic part at present, the pole and the shell are sealed by utilizing soft rubber, and finally the pole and the shell are connected by riveting. The sealing effect between the pole and the shell is not ideal, so that foreign matters enter between the pole and the shell; the structure is more, the cost is higher, and the assembly process is complicated.

Disclosure of Invention

The present utility model aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the utility model provides the battery cell which has good sealing effect, simplifies the assembly process and reduces the cost.

The utility model further provides a battery pack with the battery cell.

According to an embodiment of the utility model, a battery cell includes: the shell is internally provided with an installation cavity and comprises a first end wall, and a shell pole hole is formed in the first end wall; the pole group is arranged in the mounting cavity; the pole is electrically connected with the pole group, the pole penetrates through the matching position of the pole and the shell pole hole, the isolation part is connected with the sealing part, and the isolation part is used for insulating and isolating the pole positioned outside the shell pole hole from the shell.

According to the battery cell provided by the embodiment of the utility model, the sealing part is arranged at the matching position of the pole and the pole hole of the shell, the isolating part is connected with the sealing part, and the isolating part is used for insulating and isolating the pole positioned outside the pole hole of the shell from the shell, so that the sealing effect is good, the assembly process is simplified, and the cost is reduced.

According to some embodiments of the utility model, the pole comprises a pole body passing through the housing pole bore, the seal being provided at the junction of the pole body and the housing pole bore.

According to some embodiments of the utility model, the pole further comprises a pole upper portion located at an end of the pole body remote from the pole group and outside the mounting cavity, the pole upper portion having an equivalent diameter greater than the pole body;

the isolation part comprises a first isolation part, the first isolation part is connected with one end, far away from the pole group, of the sealing part, and the first isolation part is arranged between the upper part of the pole and the first end wall.

According to some embodiments of the utility model, one of the pole upper portion and the first spacer has a first fitting groove, and the other has a first fitting protrusion adapted to fit within the first fitting groove.

According to some embodiments of the utility model, the pole further comprises a pole lower portion located at an end of the pole body near the pole group and within the mounting cavity, the equivalent diameters of the pole upper portion and the pole lower portion being greater than the equivalent diameter of the pole body;

the isolation part comprises a second isolation part, the second isolation part is connected with one end, close to the pole group, of the sealing part, and the second isolation part is arranged at the lower part of the pole and the first end wall.

According to some embodiments of the utility model, one of the lower portion of the pole and the second spacer has a second embedded groove, and the other has a second embedded protrusion adapted to be embedded in the second embedded groove.

According to some embodiments of the utility model, the first end wall has a recess recessed toward the pole group, and the second isolation portion has a groove in the same direction as the recess of the recess, the recess being located within the groove.

According to some embodiments of the utility model, the battery cell further comprises a positive connection tab disposed on a positive end face of the pole group facing the first end wall, and the pole post is electrically connected to the pole group through the positive connection tab.

According to some embodiments of the utility model, the isolation seal is a one-piece injection molded part.

According to another embodiment of the utility model, a battery pack comprises the battery cell.

The isolation sealing piece in the battery pack improves sealing performance and insulating performance, simplifies the installation process, reduces the number of parts and reduces the cost.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at C;

FIG. 4 is a schematic view of a pole according to an embodiment of the present utility model;

fig. 5 is a cross-sectional view taken along line B-B of fig. 4.

Reference numerals: the battery cell 100, the case 10, the first end wall 11, the second end wall 12, the connection wall 13, the recess 14, the pole group 20, the pole group positive end face 21, the pole 30, the pole body 31, the pole upper portion 32, the pole lower portion 33, the isolation seal 40, the first isolation portion 41, the first fitting groove 411, the first fitting protrusion 412, the groove 42, the second isolation portion 43, the second fitting groove 431, the second fitting protrusion 432, the seal portion 44, and the positive electrode connection piece 50.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The battery cell 100 according to an embodiment of the present utility model is described in detail below with reference to fig. 1 to 5.

Referring to fig. 1-5, a battery cell 100 according to an embodiment of the present utility model may include a housing 10, a pole set 20, a pole post 30, and an isolation seal 40. Wherein, a mounting cavity is formed in the housing 10, the housing 10 includes a first end wall 11, and a housing post hole is formed on the first end wall 11. Optionally, the housing 10 may further comprise a second end wall 12 and a connecting wall 13 connecting the first end wall 11 and the second end wall 12, the first end wall 11, the second end wall 12 and the connecting wall 13 constituting a mounting cavity. The pole group 20 is disposed within the mounting cavity. The pole 30 is electrically connected to the pole group 20, and the pole 30 passes through the housing pole hole. Alternatively, one end of the pole group 20 is a positive pole, one end is a negative pole, one end of the pole 30 is electrically connected with the positive pole end of the pole group 20, the other end of the pole 30 passes through the pole hole of the shell, and the pole 30 partially protrudes out of the first end wall 11.

The isolation seal 40 comprises a seal part 44 and an isolation part, the seal part 44 is arranged at the matching position of the pole 30 and the pole hole of the shell, the isolation part is connected with the seal part 44, the first end wall 11 of the shell 10 and the pole 30 can be isolated outside the seal part 44, the sealing effect of the seal part 44 is improved, and the isolation part is connected with the seal part 44, for example, the isolation part and the seal part 44 are integrated, so that the installation process of the isolation seal 40 can be simplified, the number of parts is reduced, and the cost is reduced. The isolation part is used for insulating and isolating the pole 30 positioned outside the pole hole of the shell from the shell 10, has good insulation effect and is beneficial to guaranteeing the use safety of the battery cell 100.

According to the battery cell 100 of the embodiment of the utility model, the sealing part 44 is arranged at the matching position of the pole 30 and the pole hole of the shell, the isolating part is connected with the sealing part 44, and the isolating part is used for insulating and isolating the pole 30 positioned outside the pole hole of the shell from the shell 10, so that the sealing effect is good, the assembly process is simplified, and the cost is reduced.

In some embodiments of the present utility model, the pole 30 may further include a pole body 31, where the pole body 31 passes through the housing pole hole, and the sealing portion 44 is disposed at the mating position of the pole body 31 and the housing pole hole, so as to improve the tightness of the mating position of the pole body 31 and the housing pole hole, and prevent water vapor or other corrosives from entering the mounting cavity from the housing pole hole.

In some embodiments of the present utility model, referring to fig. 3 to 5, the pole 30 may further include a pole upper portion 32, where the pole upper portion 32 is located at an end of the pole body 31 away from the pole group 20 and is located outside the mounting cavity, the equivalent diameter of the pole upper portion 32 is greater than that of the pole body 31, and the outer edge of the pole upper portion 32 covers the pole body 31, so that the contact area between the pole upper portion 32 and the outside can be increased, and the conductive effect is improved. The isolation portion includes a first isolation portion 41, the first isolation portion 41 being connected to an end of the seal portion 44 remote from the pole group 20, the first isolation portion 41 being disposed between the pole upper portion 32 and the first end wall 11. The first isolation part 41 can insulate and separate the upper pole part 32 from the first end wall 11, and the first isolation part 41 can be contacted with the upper pole part 32 and the first end wall 11, so that the tightness between the pole hole of the shell and the pole 30 is improved.

In some embodiments of the present utility model, referring to fig. 3 to 5, one of the pole upper portion 32 and the first separator 41 has a first fitting groove 411, and the other has a first fitting protrusion 412, and the first fitting protrusion 412 is adapted to be fitted into the first fitting groove 411. Alternatively, as shown in fig. 3 and 5, the pole upper portion 32 has a first fitting groove 411, and the first isolation portion 41 has a first fitting protrusion 412, and when the pole upper portion 32 is mounted and connected with the first isolation portion 41, the first fitting protrusion 412 is fitted in the first fitting groove 411, which is helpful to increase the contact area between the pole upper portion 32 and the first isolation portion 41, improving the constraint force of the pole 30 on the housing 10, and improving the sealing performance and insulation performance. In an embodiment of the present utility model, which is not shown, the first spacer 41 has a first fitting groove 411, and the pole upper portion 32 has a first fitting protrusion 412, and when the pole upper portion 32 is attached to the first spacer 41, the first fitting protrusion 412 is fitted into the first fitting groove 411.

In some embodiments of the present utility model, as shown with reference to fig. 3-5, the pole 30 further includes a pole lower portion 33, the pole lower portion 33 being located at an end of the pole body 31 proximate the pole set 20 and within the mounting cavity. Optionally, the lower pole portion 33 is electrically connected to the pole group 20 via a positive connection tab 50. The equivalent diameters of the pole upper portion 32 and the pole lower portion 33 are larger than those of the pole body 31, so that the pole 30 can be prevented from falling off from the housing 10.

It should be understood that, as used above, the term "equivalent diameter" refers to the maximum distance between any two points on the corresponding cross section of the pole 30, and when the pole 30 is in a rotating structure, the term "equivalent diameter" refers to the diameter of the corresponding structure, and when the pole 30 is in a rectangular structure, the term "equivalent diameter" refers to the length of the diagonal line on the cross section of the corresponding structure.

The isolation portion may include a second isolation portion 43, where the second isolation portion 43 is connected to one end of the sealing portion 44 near the pole group 20, and the second isolation portion 43 is disposed between the pole lower portion 33 and the first end wall 11, where the second isolation portion 43 may insulate the pole lower portion 33 from the first end wall 11, so as to improve insulation between the pole lower portion 33 and the first end wall 11, and meanwhile, the second isolation portion 43 is connected to the sealing portion 44, where the second isolation portion 43 may contact both the pole lower portion 33 and the first end wall 11, so as to facilitate improvement of tightness between the pole hole of the housing and the pole 30.

In the two embodiments of the present utility model, referring to fig. 3 to 5, one of the pole lower portion 33 and the second isolation portion 43 has a second fitting groove 431, and the other has a second fitting protrusion 432, and the second fitting protrusion 432 is adapted to be fitted into the second fitting groove 431. Alternatively, as shown in fig. 3 and 5, the lower pole portion 33 has a second embedded groove 431, and the second isolation portion 43 has a second embedded protrusion 432, and when the lower pole portion 33 is connected with the second isolation portion 43, the second embedded protrusion 432 is embedded in the second embedded groove 431, which is helpful to increase the contact area between the lower pole portion 33 and the second isolation portion 43, improving the constraint force of the pole 30 on the housing 10, and improving the sealing performance and insulation performance. In an embodiment of the present utility model, which is not shown, the second separator 43 has a second fitting groove 431, and the post lower portion 33 has a second fitting protrusion 432, and when the post lower portion 33 is attached to the second separator 43, the second fitting protrusion 432 is fitted into the second fitting groove 431.

In some embodiments of the present utility model, referring to fig. 3, the first end wall 11 has a recess 14 recessed toward the pole group 20, and the second isolation portion 43 has a groove 42 in the same direction as the recess 14, and the recess 14 is located in the groove 42. Optionally, the recess 42 is located in the second isolation portion 43, and the recess 14 of the first end wall 11 is located in the recess 42, which helps to reduce the axial dimension of the battery cell 100.

In some embodiments of the present utility model, as shown in fig. 3, the battery cell 100 further includes a positive connection tab 50, the positive connection tab 50 is disposed on the positive end face 21 of the pole group 20 facing the first end wall 11, and the pole post 30 is electrically connected to the pole group 20 through the positive connection tab 50. Alternatively, as shown in fig. 3, the post lower portion 33 is electrically connected to the pole group 20 through a positive connection tab 50.

In some embodiments of the present utility model, the isolation seal 40 is an integral injection molded piece, the isolation seal 40 improves sealing and insulating properties, simplifies the installation process, reduces the number of parts, and reduces the cost.

A battery pack according to another embodiment of the present utility model includes the above-described battery cell 100.

The isolation seal 40 in the battery pack according to the embodiment of the present utility model improves sealing and insulating properties, simplifies the installation process, reduces the number of parts, and reduces the cost.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A cell, comprising:

the shell is internally provided with an installation cavity and comprises a first end wall, and a shell pole hole is formed in the first end wall;

the pole group is arranged in the mounting cavity;

the pole is electrically connected with the pole group and penetrates through the shell pole hole;

the isolating seal comprises a sealing part and an isolating part, wherein the sealing part is arranged at the matching part of the pole and the pole hole of the shell, the isolating part is connected with the sealing part, and the isolating part is used for insulating and isolating the pole positioned outside the pole hole of the shell from the shell.

2. The cell of claim 1, wherein the terminal comprises a terminal body passing through the housing terminal hole, the seal being disposed at a mating location of the terminal body and the housing terminal hole.

3. The cell of claim 2, wherein the terminal further comprises a terminal upper portion located at an end of the terminal body remote from the terminal set and outside the mounting cavity, the terminal upper portion having an equivalent diameter greater than an equivalent diameter of the terminal body;

the isolation part comprises a first isolation part, the first isolation part is connected with one end, far away from the pole group, of the sealing part, and the first isolation part is arranged between the upper part of the pole and the first end wall.

4. The cell of claim 3, wherein one of the upper terminal portion and the first separator portion has a first mating groove and the other has a first mating protrusion adapted to mate within the first mating groove.

5. The cell of any one of claims 2-4, wherein the terminal further comprises a terminal lower portion located at an end of the terminal body proximate the terminal set and within the mounting cavity, the equivalent diameters of the terminal upper portion and the terminal lower portion being greater than the equivalent diameter of the terminal body;

the isolation part comprises a second isolation part, the second isolation part is connected with one end, close to the pole group, of the sealing part, and the second isolation part is arranged between the lower part of the pole and the first end wall.

6. The cell of claim 5, wherein one of the lower terminal portion and the second separator portion has a second embedded groove and the other has a second embedded protrusion adapted to be embedded in the second embedded groove.

7. The cell of claim 5, wherein the first end wall has a recess recessed toward the pole group, the second separator has a groove in the same direction as the recess of the recess, and the recess is located in the groove.

8. The cell of claim 1, further comprising a positive connection tab disposed on a positive end face of the pole group toward the first end wall, and the pole post is electrically connected to the pole group by the positive connection tab.

9. The cell of claim 1, wherein the isolation seal is an integral injection molded piece.

10. A battery pack comprising the cell of any one of claims 1-9.