CN210805836U

CN210805836U - Power battery top cap, battery cell and electric power battery pack

Info

Publication number: CN210805836U
Application number: CN201922197349.XU
Authority: CN
Inventors: 戴亨伟; 徐卫东; 王翠; 杨伟; 张耀
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-06-19
Anticipated expiration: 2029-12-10

Abstract

The utility model discloses a power battery top cap, battery cell and electric power battery group, include, the apron: the battery shell is used for enclosing a cavity body for accommodating the battery core; a first pole unit: the cover plate is arranged on the cover plate and is connected with the electrode of the battery cell for conducting electricity; a second pole column unit: the second conductive block comprises a welding part and an extension part, the extension part is arranged in a sinking way relative to the welding part, and a two-dimensional code for recording the information of the battery cell is recorded on the extension part; the top cover insulating piece is connected with one side of the cover plate, which is far away from the battery core, and is provided with a first hollowed-out area and a second hollowed-out area, wherein the first hollowed-out area is used for exposing the first pole column unit, and the second hollowed-out area is used for exposing the second pole column unit. In the technical scheme of this application, set up the two-dimensional code at the extension of second conducting block, need not to set up transparent perspective hole and look over the two-dimensional code, make material small in quantity, more practice thrift the cost.

Description

Power battery top cap, battery cell and electric power battery pack

Technical Field

The embodiment of the application relates to the technical field of electroprobe electronics, in particular to a power battery top cover, a single battery and a power battery pack.

Background

The power battery is a power source for providing power source for equipment, such as a battery for providing power for an electric automobile, an electric train, an electric bicycle, a robot, and the like. In the power battery, the battery core is the most basic raw material in the power battery, and in order to facilitate tracing the battery core information on the power battery, a two-dimensional code is usually set on the battery core of the power battery.

The traditional method for setting the two-dimensional code on the battery core is to carve the two-dimensional code on a top cover sheet of the power battery, and set a perspective hole, namely a through hole, on the top cover sheet so as to identify the two-dimensional code burned on the top cover sheet by visual observation or code scanning equipment. But the anodal general and top cap piece and the casing electricity of electric core are connected at present, in order to guarantee electric core insulation reliability, need correspond perspective hole position at top cap paster two-dimensional code and set up transparent insulating paster, and corresponding meeting increases the material cost, simultaneously, because transparent insulating paster is thinner, and bonds through the double faced adhesive tape, easily comes off, and is insulating unreliable.

Disclosure of Invention

The embodiment of the application provides a power battery top cap, battery cell and electric power battery group, need not to set up transparent insulating paster in order to look over the two-dimensional code, and the material is small in quantity, and is with low costs, difficult quilt wearing and tearing.

In order to solve the above technical problem, the embodiment of the present application adopts a technical solution that: disclosed is a power battery top cover, including:

cover plate: the battery shell is used for enclosing a cavity body for accommodating the battery core;

a first pole unit: the cover plate is arranged on the cover plate and is connected with the electrode of the battery cell for conducting electricity;

a second pole column unit: the cover plate is mounted on the base plate and comprises a second conductive block, the second conductive block comprises a welding part and an extension part, and the extension part is arranged in a sinking mode relative to the welding part

The top cover insulating sheet, with keeping away from of apron one side of electricity core is connected, the top cover insulating sheet is provided with first fretwork district and second fretwork district, first fretwork district is used for exposing first utmost point post unit, second fretwork district is used for exposing second utmost point post unit.

Optionally, the battery further comprises a turnover valve, the turnover valve is arranged at one side of the extension part, which is far away from the two-dimensional code, at intervals, when the temperature of the battery cell reaches a preset threshold value, the turnover valve is turned over and is in contact with the extension part of the second conductive block, so as to fuse the fusing structure of the battery cell for open-circuit protection.

Optionally, a step structure is arranged on the second conductive block, the second pole unit further includes an upper insulating member, one side of the upper insulating member is embedded in the step structure, and the opposite side of the upper insulating member is connected to the cover plate.

Optionally, the first pole unit comprises a first conductive block, a resistance gasket, a first sealing element and a first through conductive piece which are connected in sequence, a first mounting hole is formed in the cover plate, the first sealing element is sleeved on the first through conductive piece, the free end of the first through conductive piece penetrates through the first mounting hole and then is sequentially communicated with the resistance gasket and the first conductive block to conduct electricity, and the first sealing element is pressed and arranged between the first through conductive piece and the cover plate.

Optionally, the second pole unit further includes a second sealing element and a second through conductive element, a second mounting hole is formed in the cover plate, the second sealing element is sleeved on the second through conductive element, and a free end of the second through conductive element sequentially penetrates through the second mounting hole and the upper insulating element and then is communicated with the second conductive block for conduction.

Optionally, the first pole unit further includes a first lower insulating member, and the first lower insulating member is disposed on the cover plate and located on one side of the cover plate facing the battery core.

Optionally, a second lower insulating member is further disposed on the second pole column unit, and the second lower insulating member is disposed on the cover plate and located on one side of the cover plate facing the battery core.

On the other hand, this application still discloses a battery cell, including above-mentioned arbitrary one the power battery top cap to and electric core, electrolyte and battery case, the battery top cap with battery case encloses into the cavity body, electric core accept in the cavity body, pack in the cavity electrolyte.

Optionally, the single battery further includes an outer insulating film, and the outer insulating film is wrapped on the battery case to perform insulation protection on the single battery.

On the other hand, the application also discloses a power battery pack, which comprises two or more single batteries, wherein the single batteries are electrically connected with each other.

The beneficial effects of the embodiment of the application are as follows: in the technical scheme of this application, set up the two-dimensional code at the extension of second conducting block, need not to set up transparent perspective hole and look over the two-dimensional code, make material small in quantity, more practice thrift the cost. And the welding part is higher than the extension part, when the power battery has poor welding, the welding part is conveniently polished, the two-dimensional code recorded by the extension part can not be damaged, and the design is more ingenious.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a single battery of the present application;

FIG. 2 is a general schematic view of a top cover of a power battery of the present application;

FIG. 3 is an exploded view of the battery top cover of the present application;

FIG. 4 is a schematic view of a second conductive block structure according to the present application;

FIG. 5 is a cross-sectional view of a second conductive block and a peripheral structure according to the present application;

fig. 6 is a schematic structural diagram of the power battery pack of the present application.

Description of the essential elements

1. A power battery top cover; 2. a battery case; 3. an outer insulating film; 4. a top cover insulating sheet; 8. a confluence sheet;

11. a cover plate; 12. a first pole unit; 13. a second pole column unit; 14. an explosion-proof valve structure; 15. a roll-over valve; 41. a first hollowed-out area; 42. a second hollowed-out area;

121. a first conductive block; 122. a resistor pad; 123. a first lower insulator; 124. a first seal member; 125. a first through conductive member; 131. a second conductive block; 132. an upper insulating member; 133. a second lower insulating member; 134. a second seal member; 135. a second through conductive member;

1311. welding the part; 1312. an extension portion; 1313. a step structure; 1321. a nested configuration.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In some of the flows described in the specification and claims of this application and in the above-described figures, a number of operations are included that occur in a particular order, but it should be clearly understood that these operations may be performed out of order or in parallel as they occur herein, the number of operations, e.g., 11, 12, etc., merely being used to distinguish between various operations, and the number itself does not represent any order of performance. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a single battery disclosed in this embodiment, where the single battery includes a power battery top cover 1, a battery core (not shown), an electrolyte (not shown), and a battery case 2, the battery top cover and the battery case enclose a cavity for accommodating the battery core, and the cavity is filled with the electrolyte.

Specifically, referring to fig. 2 to 5, the structure of the top cover of the power battery includes: apron 11, explosion-proof valve structure 14, first utmost point post unit 12, second utmost point post unit 13 and top cap insulating piece 4, wherein, apron 11: a hollow cavity body for accommodating the electric core is formed by enclosing the battery shell 2; explosion-proof valve structure 14: is mounted on the cover plate 11; first pole unit 12: the cover plate 11 is arranged on the battery cell and is electrically connected with the electrode of the battery cell; second pole cell 13: the second conductive block 131 is mounted on the cover plate 11, and includes a second conductive block 131, where the second conductive block 131 includes a welding portion 1311 and an extending portion 1312, the extending portion 1312 is disposed in a recessed manner with respect to the welding portion 1311, a two-dimensional code (not shown) for recording information of the battery cell is recorded on the extending portion 1312, the second conductive block further includes a top cover insulating sheet 4 connected to one side of the cover plate 11, the side being away from the battery cell, the top cover insulating sheet 4 is provided with a first hollow-out region 41 and a second hollow-out region 42, the first hollow-out region 41 is used for exposing the first pole unit 12, the second hollow-out region 42 is used for exposing the second pole unit 13, and the top cover insulating sheet 4 is attached to the cover plate 11 to.

In the technical scheme of this application, set up the two-dimensional code at the extension 1312 of second conductive piece 131, need not to set up transparent perspective hole and look over the two-dimensional code, make the material small in quantity, more practice thrift the cost. And welding portion 1311 is higher than extension 1312, and when power battery appears the welding failure, conveniently polish at welding portion 1311, and can not damage the two-dimensional code of extension 1312 writing, the design is more ingenious.

In an embodiment, the battery further includes a flipping valve 15, the flipping valve 15 is disposed at an interval on a side of the extension portion 1312, the side being away from the two-dimensional code, and the flipping valve 15 flips when the cell temperature reaches a preset threshold value and contacts the extension portion 1312 of the second conductive block 131 to fuse the fuse structure of the cell for open-circuit protection. In an embodiment, the roll-over valve 15 is disposed inside the cover plate 11, and a gap is disposed between the roll-over valve 15 and the extension 1312, so that the roll-over valve 15 can contact the extension 1312 when being rolled over, a gap should be disposed between the roll-over valve 15 and the second conductive block 131, and if other elements are sandwiched between the roll-over valve 15 and the second conductive block 131, such as the upper insulating member 132 and the bottom of the cover plate 11, a through hole for rolling over the roll-over valve 15 should be disposed, so as to achieve the purpose of protecting the open circuit.

In an embodiment, a step structure 1313 is disposed on the second conductive block 131, the second pole unit 13 further includes an upper insulating member 132, a nesting structure 1321 is disposed on one side of the upper insulating member 132, and the other side of the upper insulating member is connected to the cover plate 11, and the step structure 1313 and the nesting structure 1321 are adapted to allow the second conductive block 131 to be nested on the upper insulating member 132. In one embodiment, the step 1313 is disposed on an outer edge of the second conductive block 131, for example, on an outer edge of the extending edge 1312, and a nesting structure 1321 is disposed on the upper insulating member 132 at a position matching the extending edge 1312 in the second conductive block 131, the nesting structure 1321 may be a sliding groove structure, the step 1313 is a protrusion structure, and the second conductive block 131 is fixed on the upper insulating member 132 by inserting the step 1313 of the protrusion structure into the sliding groove structure. In an embodiment, the upper insulating member 132 is provided with a groove having the same shape as the second conductive block 131, and when the step structure 1313 is inserted into the nesting structure 1321, the second conductive block 131 is completely accommodated in the groove, and the groove can be closed by the step structure 1313, so that dust or foreign substances generated from the outside cannot leak from a gap between the second conductive block 131 and the upper insulating member 132. Especially, when the whole cover plate 11 is not welded stably, when the welding portion 1311 is welded, metal chips generated by grinding cannot fall into the position of the pole extension portion from a gap due to blocking of the step structure 1313, and therefore the pole unit is conducted in advance.

In an embodiment, the first pole unit 12 includes a first conductive block 121, a resistance spacer 122, a first sealing member 124, and a first through conductive member 125, which are sequentially connected to each other, the cover plate 11 is provided with a first mounting hole 111, the first sealing member 124 is sleeved on the first through conductive member 125, a free end of the first through conductive member 125 passes through the first mounting hole 111 and then sequentially communicates with the resistance spacer 122 and the first conductive block 121 for conduction, the first sealing member 124 is an elastic structure, and the first sealing member 124 is pressed between the first through conductive member 125 and the cover plate 11 for buffering with the bottom of the cover plate 11 after the free end of the first through conductive member 125 passes through the first mounting hole 111.

In an embodiment, the second pole unit 13 further includes a second sealing element 134 and a second through conductor 135, the cover plate 11 is provided with a second mounting hole 112, the second sealing element 134 is sleeved on the second through conductor 135, and a free end of the second through conductor 135 penetrates through the second mounting hole 112 and then is sequentially communicated with the upper insulating element 132 and the second conductive block 131 for conducting electricity. The second sealing member 134 is of an elastic structure for buffering with the bottom of the cover plate 11 after the free end of the second through conductor 135 passes through the second mounting hole 112.

In an embodiment, a first lower insulating member 123 is further disposed on the first pole unit 12 and located on a side of the cover plate 11 facing the battery cell, and a second lower insulating member 133 is also disposed on the second pole unit 13 and located on a side of the cover plate 11 facing the battery cell.

In one embodiment, an outer insulating film 3 is further disposed on the battery case 2, and the outer insulating film covers the battery case to protect the single battery from insulation.

In an embodiment, the battery pack further includes a power battery pack, please refer to fig. 6, which includes two or more of the above-disclosed single batteries, and the single batteries are electrically connected to each other. The power battery pack comprises a confluence sheet 8 and a plurality of single batteries, wherein the single batteries are electrically connected with the confluence sheet 8. When the power battery pack is implemented, the confluence sheet 8 in the power battery pack is electrically connected with the riveting blocks (not shown) of the single batteries, the riveting blocks of the single batteries corresponding to the positive pole posts are connected through the confluence sheet, and the riveting blocks of the single batteries corresponding to the negative pole posts are connected through the confluence sheet, so that the assembly of the battery pack is realized.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. A power battery top cap, characterized by, includes:

a second pole column unit: the battery cell comprises a cover plate, a first conductive block and a second conductive block, wherein the cover plate is arranged on the cover plate and comprises a welding part and an extension part, the extension part is arranged in a sinking mode relative to the welding part, and a two-dimensional code for recording the information of the battery cell is recorded on the extension part;

2. The power battery top cap of claim 1, further comprising a turnover valve, wherein the turnover valve is disposed at an interval on a side of the extension portion away from the two-dimensional code, and when the cell temperature reaches a preset threshold value, the turnover valve turns over and contacts with the extension portion of the second conductive block to fuse the fuse structure of the cell for open-circuit protection.

3. The top cap of claim 1, wherein a step structure is disposed on the second conductive block, the second pole unit further comprises an upper insulator, one side of the upper insulator is embedded in the step structure, and the opposite side of the upper insulator is connected to the cover plate.

4. The power battery top cover according to claim 1, wherein the first pole unit comprises a first conductive block, a resistance gasket, a first sealing element and a first through conductive element which are sequentially connected, the cover plate is provided with a first mounting hole, the first sealing element is sleeved on the first through conductive element, a free end of the first through conductive element penetrates through the first mounting hole and then is sequentially communicated with the resistance gasket and the first conductive block for conducting electricity, and the first sealing element is pressed between the first through conductive element and the cover plate.

5. The top cover of the power battery as claimed in claim 3, wherein the second pole unit further comprises a second sealing element and a second through conductive element, the cover plate is provided with a second mounting hole, the second sealing element is sleeved on the second through conductive element, and a free end of the second through conductive element sequentially penetrates through the second mounting hole and the upper insulating element and then is communicated with the second conductive block for conducting electricity.

6. The power battery top cover according to claim 1, further comprising a first lower insulating member on the first pole unit, wherein the first lower insulating member is disposed on the cover plate and located on a side of the cover plate facing the battery core.

7. The power battery top cover according to claim 1, wherein a second lower insulator is further disposed on the second pole column unit, and the second lower insulator is disposed on the cover plate and located on a side of the cover plate facing the battery core.

8. A single battery, which is characterized by comprising the power battery top cover as recited in any one of claims 1 to 7, a battery core, an electrolyte and a battery shell, wherein the battery top cover and the battery shell enclose a cavity body, the battery core is accommodated in the cavity body, and the electrolyte is filled in the cavity.

9. The single battery of claim 8, further comprising an outer insulating film wrapped on the battery case to protect the single battery from insulation.

10. An electric power battery pack comprising two or more single cells according to any one of claims 8 to 9, wherein the single cells are electrically connected to each other.