CN218996897U - Battery monomer, energy storage device and electric equipment - Google Patents

Abstract

The utility model discloses a battery monomer, an energy storage device and electric equipment, wherein the battery monomer comprises the following components: a housing and an end cap. The housing has an opening, and the end cap includes: a body portion, a post, and a seal. The body part is provided with a mounting boss, the pole is penetrated through a mounting hole of the mounting boss, a threaded hole for fixedly connecting the row is formed in the pole, the inner diameter of the mounting boss is larger than the outer diameter of the pole, and the sealing element is arranged between the mounting boss and the pole. Therefore, the mounting boss and the pole are fixed through the sealing piece, the threaded hole is formed in the pole, the pole and the connecting row can be conveniently connected, and the assembly efficiency of the battery is improved while the battery is provided with a simple sealing structure.

Description

Battery monomer, energy storage device and electric equipment

Technical Field

The utility model relates to the field of secondary batteries, in particular to a battery monomer, an energy storage device and electric equipment.

Background

The end covers are generally arranged at two ends of the battery shell and are used for plugging the battery shell so that the battery cells keep good tightness, and the end covers are provided with pole posts which are electrically connected with the winding cores in the battery cells so that the battery cells can be charged and discharged through the pole posts. When the battery cells are combined into a battery pack, the connecting row can be connected with the pole to form current conduction among the plurality of battery cells.

In the prior art, because the pole is connected with the end cover in a combined way, and the pole is welded with the connecting row, in order to ensure the tightness of the battery monomers, a complex sealing structure is required to be arranged between the pole and the end cover, and the connecting mode between the pole and the connecting row is welding, so that the assembly efficiency of the battery monomers is lower.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery cell having a simple sealing structure and high assembly efficiency.

A further object of the utility model is to propose an energy storage device with a battery cell as described above.

A further object of the utility model is to propose a powered device having an energy storage device as described above.

According to an embodiment of the first aspect of the present utility model, the battery cell includes: a housing and an end cap. The housing has an opening, and the end cap includes: a body portion, a post, and a seal. The body part is provided with a mounting boss, the pole is penetrated through a mounting hole of the mounting boss, a threaded hole for fixedly connecting the row is formed in the pole, the inner diameter of the mounting boss is larger than the outer diameter of the pole, and the sealing element is arranged between the mounting boss and the pole.

According to the battery cell of the embodiment of the first aspect of the utility model, the pole column penetrates through the mounting hole of the mounting boss, and the threaded hole on the pole column can be used for fixing the connection row. When the battery monomer is assembled, the outer diameter of the pole is smaller, so that the battery monomer can be smoothly placed in the installation boss, the sealing piece between the installation boss and the pole can be extruded to prevent the pole from falling off from the installation hole, and the tightness of the battery monomer is improved while the pole is connected with the installation boss. When a plurality of battery monomers are combined, stable connection of the connection row can be realized through cooperation of the bolts and the threaded holes. Therefore, the mounting boss and the pole are fixed through the sealing piece, the threaded hole is formed in the pole, the pole and the connecting row can be conveniently connected, and the assembly efficiency of the battery is improved while the battery is provided with a simple sealing structure.

In some embodiments, the mounting boss is provided with a first sealing groove far away from the pole recess, the pole is provided with a second sealing groove far away from the mounting boss recess, and the sealing piece is provided with a first sealing flange extending into the first sealing groove and a second sealing flange extending into the second sealing groove. Therefore, the pole can be prevented from falling out of the mounting hole, and the connection stability of the pole and the body part is improved.

Further, the first seal groove and the second seal groove are located in the same horizontal plane. Thus, a labyrinth seal structure can be formed, and the sealing effect can be improved.

In some embodiments, the pole comprises: the outer diameter of the first shaft section is smaller than that of the second shaft section, the first shaft section stretches into the mounting hole, and the second shaft section is pushed against the sealing piece. Therefore, the sealing element can be prevented from falling out of the mounting hole, and the sealing effect is improved.

Further, a limiting flange is arranged on the second shaft section, and the outer diameter of the limiting flange is larger than that of the second shaft section and is used for limiting the pole. Therefore, the axial direction of the pole in the mounting hole can be limited, the pole is prevented from falling out of the mounting hole, and the connection stability of the pole and the body is improved.

In some embodiments, the outer end face of the post is flush with the outer end face of the mounting boss. Therefore, the contact area between the pole and the connecting row can be increased, so that the connection between the pole and the connecting row is more stable.

Further, the mounting boss includes: the first boss section and the second boss section that link to each other in proper order in the direction of keeping away from body portion, the external diameter of first boss section is greater than the external diameter of second boss section. Therefore, the structural strength of the connection between the pole and the end cover can be improved, and the reliability of the battery cell is improved.

Optionally, the height H1 of the first land and the height H2 of the second land satisfy: H2/H1 is less than or equal to 2.5 and less than or equal to 3.5. Therefore, the structural strength of the connection between the pole and the end cover can be further improved, and the reliability of the battery cell is improved.

In some embodiments, a heat dissipation hole coaxial with the threaded hole is further provided on the pole. Therefore, the heat dissipation holes can be used for dissipating the heat of the battery cells, and the safety of the battery cells is improved.

An energy storage device according to an embodiment of the second aspect of the present utility model comprises the battery cell of the above embodiment.

According to the energy storage device provided by the embodiment of the utility model, the battery monomer is adopted, so that the assembly efficiency of the energy storage device can be improved.

An electrical consumer according to an embodiment of the third aspect of the utility model comprises an energy storage device as in the above embodiment.

According to the electric equipment provided by the embodiment of the utility model, the energy storage device is adopted, so that the assembly efficiency of the electric equipment can be improved, and the cost is saved.

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

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a perspective view of an end cap of a battery cell according to an embodiment of the first aspect of the present utility model.

Fig. 2 is a side view of an end cap of a battery cell according to an embodiment of the first aspect of the utility model.

Fig. 3 is a cross-sectional view of an end cap of a battery cell according to an embodiment of the first aspect of the utility model.

Fig. 4 is a perspective view of a battery cell post according to an embodiment of the first aspect of the present utility model.

Fig. 5 is a cross-sectional view of a post of a battery cell according to an embodiment of the first aspect of the utility model.

Fig. 6 is a perspective view of a sealing member of a battery cell according to an embodiment of the first aspect of the present utility model.

Fig. 7 is a front view of a battery cell according to an embodiment of the first aspect of the present utility model.

Fig. 8 is a schematic perspective view of an energy storage device according to an embodiment of the second aspect of the present utility model.

Fig. 9 is a schematic diagram of a powered device according to an embodiment of the third aspect of the present utility model.

Reference numerals:

a battery monomer 1,

End cap 100,

A body 10, a mounting boss 11, a first boss section 111, a second boss section 112, a first seal groove 113, a mounting hole 12,

A pole 20, a threaded hole 21, a first shaft section 22, a second seal groove 221, a second shaft section 23, a limit flange 231, a heat dissipation hole 24,

A seal 30, a first seal flange 31, a second seal flange 32, an upper seal sub-member 33, a lower seal sub-member 34,

A housing 200,

An energy storage device 2,

And the electric equipment 3.

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 only and are not to be construed as limiting the utility model.

The battery cell 1, the energy storage device 2 and the electric device 3 according to the embodiment of the utility model are described below with reference to fig. 1 to 9.

As shown in fig. 1, 3, and 7, a battery cell 1 according to an embodiment of the first aspect of the present utility model, the battery cell 1 includes: an end cap 100 and a housing 200. The housing 200 has an opening, and the end cap 100 includes: a body portion, and a post 20 and seal 30.

The body 10 has a mounting boss 11, the pole 20 is penetrated by a mounting hole 12 of the mounting boss 11, a threaded hole 21 for fixing the connection row is formed on the pole 20, the inner diameter of the mounting boss 11 is larger than the outer diameter of the pole 20, and a sealing member 30 is arranged between the mounting boss 11 and the pole 20.

Specifically, the pole 20 is inserted through the mounting hole 12 of the mounting boss 11, and the screw hole 21 on the pole 20 may be used to fix the connection row. When the battery cell 1 is assembled, the outer diameter of the pole 20 is small, so that the battery cell can be smoothly placed in the mounting boss 11, the sealing piece 30 between the mounting boss 11 and the pole 20 can squeeze the mounting boss 11 and the pole 20, the pole 20 is prevented from falling from the mounting hole 12, and the sealing performance of the battery cell 1 is improved while the pole 20 is connected with the mounting boss 11 stably. When a plurality of battery cells 1 are combined, stable connection of the connection rows can be realized through cooperation of bolts and threaded holes 21.

According to the end cap 100 of the first embodiment of the present utility model, the mounting boss 11 and the pole 20 are fixed by the sealing member 30, and the threaded hole 21 is formed in the pole 20, so that the connection between the pole 20 and the connection row is facilitated, and the assembly efficiency of the battery cell 1 is improved while the battery cell 1 has a simple sealing structure.

The threaded hole 21 for fixing the connection row is formed in the pole 20, when the pole 20 is assembled with the connection row, the connection row and the pole 20 are in good contact at the moment, the connection between the connection row and the pole 20 is stable, and the use reliability of the battery cell 1 can be improved.

The type of material of the sealing member 30 is not particularly limited, and the material of the sealing member 30 may be metal, rubber or a composite material of metal and rubber, so long as the sealing between the mounting boss 11 and the pole 20 is satisfied, and the material may be selected according to actual needs.

As shown in fig. 3 to 6, further, the mounting boss 11 is provided with a first sealing groove 113 recessed away from the pole 20, the pole 20 is provided with a second sealing groove 221 recessed away from the mounting boss 11, and the seal 30 has a first sealing flange 31 extending into the first sealing groove 113 and a second sealing flange 32 extending into the second sealing groove 221.

Specifically, the mounting boss 11 is provided with the first seal groove 113, the pole 20 is provided with the second seal groove 221, the first seal flange 31 and the second seal flange 32 of the seal 30 can extend into the first seal groove 113 and the second seal groove 221, respectively, after the body 10, the pole 20 and the seal 30 are mounted, the first seal flange 31 and the second seal flange 32 can be locked in the first seal groove 113 and the second seal groove 221, respectively, and the relative positional relationship between the pole 20 and the mounting boss 11 can be restricted while the pole 20 and the mounting boss 11 are sealed.

This prevents the pole 20 from coming out of the mounting hole 12, and improves the connection stability between the pole 20 and the body 10.

Further alternatively, the first seal groove 113 and the second seal groove 221 are located in the same horizontal plane.

Specifically, when the first seal groove 113 and the second seal groove 221 are located on the same horizontal plane, the pole 20 and the seal member 30 have a plurality of contact surfaces, the seal member 30 and the mounting boss 11 also have a plurality of contact surfaces, and a certain angle is formed between the plurality of contact surfaces, when the end cap 100 is assembled on the battery cell 1, the battery cell 1 is provided with electrolyte, and if the electrolyte flows out from the inside of the battery cell 1, the plurality of contact surfaces having a certain angle between the pole 20 and the seal member 30, and the seal member 30 and the mounting boss 11 can block the electrolyte, and the electrolyte can be throttled when flowing from the contact surfaces, thereby forming the labyrinth sealing effect.

Thus, a labyrinth seal structure can be formed, and the sealing effect can be improved.

As shown in fig. 6, alternatively, the seal 30 may include an upper seal sub 33 and a lower seal sub 34, the upper seal sub 33 and the lower seal sub 34 being split at the first seal groove 113 and the second seal groove 221. When the end cap 100 is assembled, the upper sealing sub-member 33 can be firstly installed into the installation hole 12 from the upper side of the installation boss 11, then the installation hole 12 with the pole post 20 is installed into the installation boss 11, and finally the installation hole 12 is installed below the body part 10 with the lower sealing sub-member 34, so that the installation difficulty can be reduced while the sealing effect is ensured.

As shown in fig. 3-5, in some embodiments, the pole 20 includes: the first shaft section 22 and the second shaft section 23, the outer diameter of the first shaft section 22 is smaller than that of the second shaft section 23, the first shaft section 22 stretches into the mounting hole 12, and the second shaft section 23 is pushed against the sealing piece 30.

Specifically, after the end cover 100 is assembled, the first shaft section 22 is located in the mounting hole 12, and the first shaft section 22 is sleeved in the sealing member 30, the sealing member 30 can seal between the first shaft section 22 and the mounting boss 11, and the second shaft section 23 has a larger outer diameter and can push against the sealing member 30.

This prevents the seal 30 from coming out of the mounting hole 12, thereby improving the sealing effect.

Further, a limiting flange 231 is disposed on the second shaft section 23, and the outer diameter of the limiting flange 231 is larger than the outer diameter of the second shaft section 23 and is used for limiting the pole 20. Thus, the limit flange 231 can limit the axial direction of the pole 20 in the mounting hole 12, prevent the pole 20 from falling out of the mounting hole 12, and improve the connection stability of the pole 20 and the body 10.

As shown in fig. 2-3, in some embodiments, the outer end surface of the pole 20 is flush with the outer end surface of the mounting boss 11.

Specifically, the pole 20 can be arranged in the installation boss 11 in a penetrating manner through the installation hole 12, and the installation boss 11 has a certain thickness, so that the installation boss 11 can protect the pole 20 while limiting the pole 20, so that the connection stability between the pole 20 and the body 10 is improved, the outer end face of the pole 20 is flush with the outer end face of the installation boss 11 in the direction away from the body 10, the contact area between the pole 20 and the connection row can be increased when the pole 20 is connected with the connection row through the threaded fastener, the connection between the end cover 100 and the connection row is firmer, and the charge-discharge stability of the battery cell 1 is improved.

As shown in fig. 3, further, the mounting boss 11 includes: the first land 111 and the second land 112 are connected in this order in a direction away from the body portion 10, and an outer diameter of the first land 111 is larger than an outer diameter of the second land 112.

Specifically, the first boss 111 is close to the body 10, and the first boss 111 is connected to the body 10, and the outer diameter of the first boss 111 is larger than that of the second boss 112, so that the connection area between the root of the mounting boss 11 and the body 10 can be increased, and the connection stability between the mounting boss 11 and the body 10 can be further increased. Since the pole 20 is inserted through the mounting hole 12 on the mounting boss 11, the connection stability between the pole 20 and the body 10 can be further improved, and the pole 20 and the body 10 can be prevented from being disconnected when the battery cell 1 is impacted.

This can improve the structural strength of the connection between the electrode post 20 and the end cap 100, and can increase the reliability of the battery cell 1.

The proportional relationship between the outer diameter of the first land 111 and the outer diameter of the second land 112 is not particularly limited, and may be selected according to practical needs by making the outer diameter of the first land 111 larger than the outer diameter of the second land 112.

As shown in fig. 2, alternatively, the height H1 of the first land 111 and the height H2 of the second land 112 satisfy: H2/H1 is less than or equal to 2.5 and less than or equal to 3.5. This can further improve the structural strength of the connection between the electrode post 20 and the end cap 100, and can increase the reliability of the battery cell 1.

For example, the ratio between the height H1 of the first land 111 and the height H2 of the second land 112 may be h2/h1=2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, which may be selected according to practical needs.

In some embodiments, the post 20 is further provided with a heat sink 24 coaxial with the threaded bore 21. Thereby, the heat dissipation hole 24 can dissipate the heat of the battery cell 1, and the safety of the battery cell 1 is improved.

As shown in fig. 8, an energy storage device 2 according to an embodiment of the second aspect of the present utility model includes a battery cell 1 in the above-described embodiment.

According to the energy storage device 2 of the embodiment of the utility model, the battery cell 1 is adopted, so that the assembly efficiency of the energy storage device 2 can be improved.

The powered device 3 according to an embodiment of the third aspect of the utility model comprises the energy storage device 2 of the above-described embodiment.

In the present embodiment, the structure of the electric device 3 is not limited. For example, the electric device 3 may be a mobile device such as a vehicle, a ship, a small aircraft, etc., which includes a power source including the energy storage device 2 described above. The electric energy provided by the energy storage device 2 provides driving force for the electric equipment 3. The mobile device may be a pure electric device, i.e. the driving force of the electric device 3 is all electric energy, and the power source only comprises the energy storage device 2. The mobile device can also be a hybrid power device, and the power source comprises an energy storage device 2, an engine and other power devices. Taking the vehicle shown in fig. 9 as an example, in some embodiments, the electric device 3 is a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, an extended range vehicle, an electric tricycle, a two-wheel electric vehicle, or the like.

For another example, the electric device 3 is an energy storage device such as an energy storage cabinet, and can be used as a charging cabinet of a mobile device or an energy storage device of other devices. For example, the solar power generation equipment can be provided with an energy storage cabinet, and electric energy generated by solar power generation is temporarily stored in the energy storage cabinet so as to be used for devices such as street lamps and bus stop boards.

According to the electric equipment 3 provided by the embodiment of the utility model, the energy storage device 2 is adopted, so that the assembly efficiency of the electric equipment 3 can be improved, and the cost is saved.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in 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. The "first feature" and "second feature" may include one or more of the features. The meaning of "plurality" is two or more. A first feature "above" or "below" a second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. The first feature being "above," "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A battery cell, comprising:

-a housing (200), the housing (200) having an opening;

an end cap (100), the end cap (100) comprising:

a body portion (10), the body portion (10) having a mounting boss (11);

the pole column (20), the pole column (20) is penetrated through the mounting hole (12) of the mounting boss (11), and the pole column (20) is provided with a threaded hole (21) for fixing the connecting row;

and the inner diameter of the mounting boss (11) is larger than the outer diameter of the pole (20), and the sealing piece (30) is arranged between the mounting boss (11) and the pole (20).

2. The battery cell according to claim 1, wherein a first sealing groove (113) recessed away from the terminal post (20) is provided on the mounting boss (11), a second sealing groove (221) recessed away from the mounting boss (11) is provided on the terminal post (20), and the sealing member (30) is provided with a first sealing flange (31) extending into the first sealing groove (113) and a second sealing flange (32) extending into the second sealing groove (221) respectively.

3. The battery cell of claim 2, wherein the first seal groove (113) and the second seal groove (221) are located in the same horizontal plane.

4. The battery cell according to claim 1, wherein the post (20) comprises: the sealing device comprises a first shaft section (22) and a second shaft section (23), wherein the outer diameter of the first shaft section (22) is smaller than that of the second shaft section (23), the first shaft section (22) stretches into the mounting hole (12), and the second shaft section (23) is pushed against the sealing piece (30).

5. The battery cell according to claim 4, wherein a limiting flange (231) is provided on the second shaft section (23), the limiting flange (231) having an outer diameter larger than the outer diameter of the second shaft section (23) and being used for limiting the pole (20).

6. The battery cell according to claim 1, wherein an outer end surface of the post (20) is flush with an outer end surface of the mounting boss (11).

7. The battery cell according to claim 6, wherein the mounting boss (11) includes: and a first boss section (111) and a second boss section (112) which are sequentially connected in a direction away from the body section (10), wherein the outer diameter of the first boss section (111) is larger than that of the second boss section (112).

8. The battery cell according to claim 7, wherein the height H1 of the first land section (111) and the height H2 of the second land section (112) satisfy: H2/H1 is less than or equal to 2.5 and less than or equal to 3.5.

9. The battery cell according to any one of claims 1-8, wherein the post (20) is further provided with a heat dissipation hole (24) coaxial with the threaded hole (21).

10. An energy storage device, characterized in that the energy storage device (2) comprises a battery cell (1) according to any one of claims 1-9.

11. A powered device, characterized in that the powered device (3) comprises an energy storage device (2) as claimed in claim 10.

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