CN112259837B - Electric energy storage unit - Google Patents
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- CN112259837B CN112259837B CN202011023843.5A CN202011023843A CN112259837B CN 112259837 B CN112259837 B CN 112259837B CN 202011023843 A CN202011023843 A CN 202011023843A CN 112259837 B CN112259837 B CN 112259837B
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Abstract
The invention provides a cell insulation protection structure, a cell and an electric energy storage unit, wherein the insulation protection structure is used for insulation protection of the outer surface of a shell of the cell, the cell is a square cell and is configured in the electric energy storage unit, the electric energy storage unit is provided with a plurality of battery modules, each battery module is composed of a plurality of cells which are arranged in an overlapping mode, the cell insulation protection structure comprises an insulation layer coated on the outer surface of the shell, and the area covered by the insulation layer comprises areas which respectively extend a distance a to the end surfaces of two sides of the edge by taking the edge of the largest end surface of the cell as a reference. According to the cell insulation protection structure, only two side areas of the edge of the maximum end face of the cell are insulated, so that compared with the existing full-coating mode, the usage amount of an insulation material can be reduced, and the cost can be reduced.
Description
Technical Field
The invention relates to the technical field, in particular to a cell insulation protection structure, and also relates to a cell using the protection structure and an electric energy storage unit using the cell.
Background
With the increasing prominence of resource and environmental issues and the strong support of national policies, conventional fuel vehicles are gradually replaced by new energy vehicles, and among the new energy vehicles, electric vehicles using power batteries as energy sources have been accepted by more and more people. In the existing power battery structure, a square aluminum shell battery cell is a battery cell form which is widely applied, and in the square battery cell, because a shell of the square battery cell generally has an electrode, the surface of the battery cell needs to be subjected to insulation protection treatment.
The existing electric core insulation protection is an insulation processing mode of fully coating the surface of an electric core except the surface of an electrode pole, and the mode not only ensures that the using amount of an insulating material is larger, but also has higher cost. And pile up at electric core and arrange when constituting the module, because of can be equipped with thermal-insulated or buffer material that has insulating properties usually between the adjacent electric core, multiple insulation not only causes the waste in the space this moment, also does not benefit to the absorption to electric core inflation deformation simultaneously.
Disclosure of Invention
In view of the above, the present invention is directed to a cell insulation protection structure, which at least reduces the amount of insulation material used.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides an electric core insulation protective structure for the insulation protection of the casing surface of electric core, electric core is square electric core, just electric core is disposed in the electric energy storage unit, a plurality of battery module have among the electric energy storage unit, the battery module is arranged by the superpose a plurality of electric core constitutes, just:
the battery core is provided with a length d, a width k and a thickness h, the length d of the battery core is greater than the width k, the width k of the battery core is greater than the thickness h, and the maximum end faces of the battery core and the battery core are oppositely arranged between the adjacent battery cores which are arranged in a stacked mode in the battery module;
the electric core insulation protection structure comprises an insulation layer coated on the outer surface of the shell, the area covered by the insulation layer comprises an edge of the maximum end face of the electric core as a reference, and the edge of the maximum end face of the electric core extends to the areas with a distance a to the end faces of the two sides of the edge respectively, wherein the edge of the maximum end face of the electric core does not comprise the edge shared by the electrode end faces of the electrodes of the electric core, the distance a is larger than (0.0625U + 2.5) and smaller than the width k, and U is the voltage value of the electric energy storage unit or the voltage value of the battery module or the adjacent voltage difference value between the electric cores in the overlapping arrangement mode.
Further, the distance a is between 2 and 65.
Further, the insulating layer is formed by a pasted insulating film, the battery cell has a single electrode end face located at the top, and:
when the thickness 2a is smaller than the thickness h, coating the edges of the largest end surfaces of the two sides of the electric core by using two insulating films so as to partially coat the side end surfaces and the bottom end surfaces of the electric core adjacent to the largest end surfaces;
when the thickness 2a is larger than or equal to the thickness h, a strip of the insulating film with the width of (2 a + h) is used for coating, so that the side end face and the bottom end face of the battery core adjacent to the largest end face are completely coated.
Furthermore, the insulating film with the position that the biggest terminal surface bottom apex angle of electricity core corresponds has symmetrical dog-ear district, and in one it has the excision district of amputation in the dog-ear district, and two dog-ear district pastes relatively, and passes through excision district makes two after pasting dog-ear district paste to on the surface of other positions of insulating film, and constitute to two dog-ear district is in the folding of the apex angle position of the biggest terminal surface of electricity core.
Further, the insulating layer is formed by a pasted insulating film, the battery cell is provided with two electrode end faces respectively arranged at two ends, and:
when the thickness 2a is smaller than the thickness h, four insulating films are adopted to coat along the edges of the maximum end surfaces on the two sides of the battery cell so as to coat the side end surface part of the battery cell adjacent to the maximum end surface;
and when the thickness 2a is larger than or equal to the thickness h, coating the side end face of the battery cell adjacent to the largest end face by using the insulating film with the width of (2 a + h).
Further, the insulating layer is made of a sprayed insulating material, and:
if the battery cell is provided with a single electrode end face positioned at the top, partially coating the side end face and the bottom end face of the battery cell adjacent to the maximum end face when 2a is smaller than the thickness h, and fully coating the side end face and the bottom end face of the battery cell adjacent to the maximum end face when 2a is larger than or equal to the thickness h;
if the battery cell is provided with two electrode end faces which are respectively arranged at two ends, when the thickness 2a is smaller than the thickness h, the side end face of the battery cell adjacent to the maximum end face is partially coated, and when the thickness 2a is larger than or equal to the thickness h, the side end face of the battery cell adjacent to the maximum end face is completely coated.
Furthermore, the region covered by the insulating layer further includes a region extending a distance e to an end surface of at least one side of an edge of the end surface of the cell electrode, where the distance e is greater than (0.0625U + 2.5) and less than a width k, and U is a voltage value of the electrical energy storage unit, or a voltage value of the battery module, or a voltage difference between adjacent cells arranged in a stacked manner.
Further, the distance e is between 2 and 65.
Compared with the prior art, the invention has the following advantages:
according to the cell insulation protection structure, only two side areas of the edge of the maximum end face of the cell are insulated, and compared with the existing full-coating mode, the usage amount of an insulation material can be reduced, so that the cost can be reduced.
Another objective of the present invention is to provide a battery cell, where the battery cell is a square battery cell, and the battery cell insulation protection structure is disposed on an outer surface of a casing of the battery cell.
In addition, the invention also provides an electric energy storage unit, wherein a plurality of battery modules are arranged in the electric energy storage unit, each battery module is composed of a plurality of stacked battery cores, an insulating partition plate is clamped between any two adjacent stacked battery cores, and the insulating partition plates can form insulating isolation between the opposite maximum end surfaces of the two adjacent battery cores.
Further, the insulating partition plate is located in a central area of the middle portion, and an edge area is arranged around the central area, wherein the thickness of the edge area is smaller than that of the central area, the width of the edge area is larger than a, or the thickness of the edge area is larger than that of the central area.
Furthermore, the insulating partition plate is made of aerogel felt, an insulating foam plate or a PP plate.
By adopting the battery cell, more space can be provided for the adjacent battery cells in the arrangement direction of the battery cells by utilizing the insulation protection structure, so that the insulation material is favorably arranged, the expansion and deformation of the battery cells are favorably absorbed, and the safety performance of the battery pack can be improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a cell insulation protection structure according to a first embodiment of the present invention (2 a < h);
FIG. 2 is a schematic view of the adhesion of the insulating film according to the first embodiment of the present invention (2 a < h);
FIG. 3 is a schematic view of the corner region of the insulating film according to the first embodiment of the present invention;
FIG. 4 is a schematic diagram of a cell insulation protection structure according to a first embodiment of the present invention (2 a is greater than or equal to h);
FIG. 5 is a schematic view of the adhesion of the insulation film according to the first embodiment of the present invention (2 a ≧ h);
fig. 6 is a schematic diagram of a cell insulation protection structure according to a second embodiment of the present invention (2 a < h);
fig. 7 is a schematic diagram of a cell insulation protection structure according to a second embodiment of the present invention (2 a is greater than or equal to h);
FIG. 8 is a schematic view of the adhesion of the insulating film according to the third embodiment of the present invention (2 a < h);
fig. 9 is a schematic diagram of a cell insulation protection structure according to a third embodiment of the present invention (2 a is greater than or equal to h);
FIG. 10 is a schematic view showing the adhesion of an insulating film according to the fourth embodiment of the present invention (2 a < h);
FIG. 11 is a schematic view of the adhesion of the insulation film according to the fourth embodiment of the present invention (2 a. gtoreq.h);
fig. 12 is a schematic view illustrating the adhesion of the insulating film according to the fifth embodiment of the present invention;
fig. 13 is a schematic view illustrating the structure of a battery module according to a sixth embodiment of the present invention;
fig. 14 is a schematic structural view of an insulating spacer according to a sixth embodiment of the present invention;
description of the reference numerals:
100. an electric core; 101. an electrode;
200. an insulating layer;
300. insulating spacer 301, central region; 302. an edge region.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
The present embodiment relates to a cell insulation protection structure, which is combined with the structure shown in fig. 1, and the protection structure is used for insulation protection of an outer surface of a casing of a cell 100, wherein the cell 100 is a square cell, and in the present embodiment, the cell 100 is also configured in an electrical energy storage unit, and the electrical energy storage unit has a plurality of battery modules, and each battery module is also composed of a plurality of the cells 100 arranged in a stacked manner.
Specifically, the electric energy storage unit of the present embodiment may be, for example, a power battery used in a new energy vehicle such as an electric vehicle, or it may also be an energy storage structure for use in a household or industrial energy storage system. The battery cell 100 according to the present embodiment belongs to a square battery cell, and therefore, in accordance with the existing square battery cell, the battery cell 100 has a length d, a width k and a thickness h, and it should be noted that the unit of each dimension in the present embodiment is mm, and in each dimension above, the length d of the battery cell 100 is greater than the width k, and the width k of the battery cell 100 is greater than the thickness h, meanwhile, as shown in fig. 13 described below, in the battery module according to the present embodiment, the largest end faces of the two battery cells 100 in the stacked arrangement are also arranged oppositely.
The electrical core insulation protection structure of the present embodiment specifically includes an insulation layer 200 coated on an outer surface of a casing of the electrical core 100, and referring to fig. 1, an area covered by the insulation layer 200 includes areas where, with an edge of a maximum end surface of the electrical core 100 as a reference, a distance a extends to two side end surfaces of each edge of the maximum end surface.
It should be noted that, in the present embodiment, the edge of the largest end surface of the battery cell 100 does not include an edge shared with the end surface of the electrode where the electrode 101 of the battery cell 100 is located. In addition, for the distance a, it is also greater than (0.0625U + 2.5) and less than the width k, where U is the voltage value of the electrical energy storage unit, or the voltage value of the battery module, or the voltage difference between adjacent battery cells 100 stacked in the battery module, and the unit of the voltage value U is V.
Generally, the above distance a is also preferably set between 2-65mm, and the specific design may be selected according to the size of the battery cell 100 and the overall cost consideration.
As a possible embodiment of the present embodiment, the insulating layer 200 provided for the insulating layer 200 may be formed by a pasted insulating film, for example. Also, as shown in fig. 1 again, the battery cell 100 in this embodiment has only a single electrode end surface at the top, so that the battery cell 100 in this embodiment has two maximum end surfaces at two opposite sides, two side end surfaces at two opposite sides, an electrode end surface at the top, and a bottom end surface at the bottom of the battery cell 100, which is not shown in the figure.
At this time, since the insulating layer 200 of the present embodiment extends a distance a toward the two side end surfaces based on the edge, when 2a is smaller than the thickness h, the present embodiment, as a preferable insulating film coating manner, also specifically, uses two insulating films to coat along the edge of the largest end surface of the two sides of the battery cell 100, so as to coat the side end surface and the bottom end surface of the battery cell 100 adjacent to the largest end surface.
In order to overcome the overlapping problem, as a preferred implementation form, in the coating design of the insulating film, as shown in fig. 2, the embodiment also makes the insulating film have two symmetrical corner regions Z at the positions corresponding to the bottom vertex angles of the maximum end surfaces of the battery core 100, and the dotted line in fig. 2 is a crease of the two corner regions Z. Meanwhile, a cut-off region Q is also provided in one of the corner regions Z.
When the two symmetrical folding regions Z are pasted oppositely, and the two folding regions Z are pasted to the outer surfaces of other parts of the insulating film by cutting the region Q, so that the folding of the two folding regions Z at the top corner of the bottom of the largest end surface of the battery cell 100 can be performed as shown in fig. 3.
Of course, except for the case where 2a is smaller than the thickness h, the case where 2a is greater than or equal to the thickness h may also be encountered in the design process, and in this case, only one insulating film with a width of 2a + h may be used to cover the battery cell 100, so as to completely cover the side end surface and the bottom end surface of the battery cell 100 adjacent to the largest end surface.
The state of fully coating the two side end surfaces and the bottom end surface of the battery cell 100 can be as shown in fig. 4, and when a single insulating film is used for coating, in a specific operation, as shown in fig. 5, the same processing means as above is still used to solve the problem of overlapping of the insulating film at the bottom vertex angle position of the maximum end surface of the battery cell 100.
In addition, in addition to the coating with the insulating film, it should be noted that the present embodiment can also use other materials to realize the insulation. It may be, for example, a sprayed insulation material such that the insulation layer 200 is composed of the sprayed insulation material. In this case, the insulating material to be sprayed and the insulating film to be adhered may be a common insulating material prepared from a commercially available power battery.
Also when the sprayed insulating material is used for the insulating layer 200, in the case where the battery cell 100 of the present embodiment has only a single electrode end face at the top, in which, in accordance with the coating effect achieved by the above-described insulating film, when 2a is smaller than the thickness h, the side end face and the bottom end face of the battery cell 100 adjacent to the largest end face are partially coated with the sprayed insulating material. And when the thickness 2a is greater than or equal to the thickness h, the side end face and the bottom end face of the battery cell 100 adjacent to the largest end face are completely coated by the sprayed insulating material.
When the insulating material is sprayed, the non-insulating region of the battery cell 100 is shielded, and then the insulating material is sprayed.
Example two
The present embodiment also relates to a cell insulation protection structure, and compared with the first embodiment, the present embodiment is mainly different in that, as shown in fig. 6, in addition to the area described in the first embodiment, the area covered by the insulation layer 200 further includes an area extending by a distance e toward the end surface on the side of each edge of the electrode end surface of the cell 100, with respect to the edge of the electrode end surface.
Each end face of the region of the extension distance e is an end face of the same side of each edge of the electrode end face, and the embodiment is also specifically each maximum end face and side end face adjacent to the electrode end face. In addition, the distance e is also greater than (0.0625U + 2.5) and less than the width k, and U is also the voltage value of the electrical energy storage unit, or the voltage value of the battery module, or the voltage difference between the adjacent battery cells 100 arranged in a stacked manner, and the unit of the voltage value U is also V.
In practical design, the distance e is preferably between 2 mm and 65mm, and it is also selected according to the size of the battery cell 100 and the overall cost. Generally, the distance e may be, for example, the same as the value of a or slightly larger than a.
It should be noted that the insulating layer 200 of the present embodiment may also be formed by a pasted insulating film or a sprayed insulating material, and both of the arrangement forms may be as described in the first embodiment. Meanwhile, similar to the two configurations of the insulating layer 200 in the first embodiment, the specific configuration of the insulating layer 200 in the present embodiment also includes the case where 2a is smaller than the thickness h as shown in fig. 6, and the case where 2a is greater than or equal to the thickness h as shown in fig. 7.
In both the above cases of fig. 6 and 7, the distance e of the insulating coating region extending from the edges at the end faces of the electrodes to one side end face thereof may be the same or different. Instead of extending to the side of the maximum end face and the side end face of the battery cell 100 as shown in fig. 6 and fig. 7, it is needless to say that the embodiment may also extend to the other side of each edge of the end face of the electrode, that is, the distance e extends on the end face of the electrode, so as to form a further insulating layer 200 on the battery cell 100. However, when the extension is only one side, in general design, the extension is both to the side of the maximum end face and the side end face.
EXAMPLE III
This embodiment also relates to a cell insulation protection structure, and compared with the above embodiments, the present embodiment is mainly different in that, as shown in fig. 8 and fig. 9, the present embodiment is an area extending to the end faces on both sides of each edge of the end faces of the electrodes of the cell 100 by a distance e.
In the present embodiment, the distance e and the specific arrangement of the insulating layer 200 can be found in the description of the second embodiment. In addition, it should be noted that, since the convex electrode 101 is also disposed on the electrode end face, the distance e should be controlled not to be larger than the distance from the electrode 101 to the maximum end face or side end face of the battery cell 100 when the insulating layer 200 on the electrode end face is disposed, or a relief structure is disposed on the insulating layer 200 at the position of the electrode 101.
Example four
Unlike the previous embodiments, the battery cell 100 of the present embodiment has two electrode end faces respectively disposed at two ends, and at this time, on the battery cell 100, in addition to the electrode end faces having the electrodes 101 at two ends, the battery cell 100 also has a maximum end face respectively disposed at two opposite sides, and two side end faces respectively disposed at the top and the bottom, as shown in fig. 10.
In the present embodiment, the insulating layer 200 is also formed of a pasted insulating film or a sprayed insulating material. In the embodiment, taking the adhered insulating films as an example, referring to fig. 10, when 2a is smaller than the thickness h, four insulating films may be used to cover the edges of the largest end surfaces on two sides of the battery cell 100, so as to cover the side end surfaces of the battery cell 100 adjacent to the largest end surfaces. When 2a is greater than or equal to the thickness h, the embodiment is coated with a strip of insulating film having a width of 2a + h as shown in fig. 11, so as to completely coat the side end surface of the battery cell 100 adjacent to the largest end surface.
If the sprayed insulating material is adopted, in this embodiment, when the thickness 2a is smaller than the thickness h, the side end surface of the battery cell 100 adjacent to the maximum end surface is partially sprayed and coated, and when the thickness 2a is greater than or equal to the thickness h, the side end surface of the battery cell 100 adjacent to the maximum end surface is completely sprayed and coated.
EXAMPLE five
Compared with the fourth embodiment, the present embodiment also relates to a cell insulation protection structure, and the difference of the present embodiment is mainly that, as shown in fig. 12, when 2a is smaller than the thickness h, in addition to the area described in the fourth embodiment, the area covered by the insulation layer 200 of the present embodiment further includes an area extending a distance e toward the end surfaces on both sides of the edge of the electrode end surface of the cell 100 with reference to the edge of the electrode end surface.
In this case, the distance e in the present embodiment may be referred to as the second embodiment, and it should be noted that fig. 12 only illustrates the situation that the end faces extend to both sides of the edge of the end face of the electrode. In addition to this, the present embodiment also includes the case of extending only to any one of the side end faces. In addition, in addition to the case where 2a is smaller than the thickness h shown in fig. 12, the present embodiment naturally also includes the case where 2a is greater than or equal to the thickness h, which can be understood by specifically combining fig. 11.
EXAMPLE six
The present embodiment first relates to a battery cell 100, where the battery cell 100 is a square battery cell, and a battery cell insulation protection structure in any one of the first to fifth embodiments is disposed on an outer surface of a casing of the battery cell 100.
At this time, the specific internal structure of the battery cell 100 of the present embodiment, the preparation thereof, and the like may all refer to the conventional square aluminum-shell battery cell structure, and the insulation protection structure provided on the battery cell 100 may refer to the descriptions in the above embodiments.
In addition, the present embodiment also relates to an electric energy storage unit, which has several dry battery modules therein, and as mentioned in the first embodiment, the electric energy storage unit can be a power battery used in a new energy vehicle such as an electric vehicle, or it can also be an energy storage structure for a household or industrial energy storage system, and is not limited herein.
As shown in fig. 13, the battery module of the present embodiment is formed by stacking a plurality of the battery cells 100, and an insulating separator 300 is interposed between any two adjacent battery cells 100. The insulating spacer 300 may form an insulating barrier between the opposite largest end surfaces of two adjacent battery cells 100.
In the present embodiment, as shown in fig. 14, for the insulation isolation between the above-mentioned pair of adjacent two battery cells 100 by the insulation partition 300, it is also generally sufficient that the length m and the width n of the insulation partition 300 and the length x and the width y of the non-insulation region F on the maximum end surface of the battery cell 100 have a relationship of m > x +2a, and n > y +2 a.
In addition, in the specific design of the insulating partition 300, it can be made of aerogel felt, insulating foam board or PP board, so that the insulating partition 300 has not only better insulating property, but also better heat insulating property and certain elastic deformation capability.
Furthermore, as an embodiment, the insulating spacer 300 can be of uniform thickness, for example. Alternatively, the present embodiment may also be as shown in fig. 14, such that the insulating spacer 300 is located in the central area 301 of the central portion, and the edge area 302 is disposed around the central area 301. Here, the thickness of the edge region 302 of the insulating spacer 300 may be set to be smaller than that of the central region 301, for example, and the width g of the edge region 302 is also larger than a.
Alternatively, the edge region 302 may be made thicker than the central region 301, which is also the preferred arrangement of the present embodiment. With such a configuration, the periphery of the insulating partition 300 contacts with the position of the battery cell 100 close to the edge, the thicker thickness of the edge region 302 is utilized to ensure the relative position between the battery cell 100 and the battery cell 100, and the middle central region 301 is thinner, which can be used to absorb the expansion deformation of the battery cell 100, so as to reduce the mutual extrusion force caused by the expansion of the battery cell 100.
The electric energy storage unit of this embodiment is through adopting above electric core 100, and usable foretell insulating protection structure provides more spaces for between adjacent electric core 100 on electric core 100 array orientation, not only is favorable to setting up insulating material from this, and also helps the absorption to electric core 100 inflation deformation to can promote the security performance of battery package.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an electric energy storage unit, have a plurality of battery module in the electric energy storage unit, its characterized in that:
the battery module is composed of a plurality of battery cores (100) which are arranged in an overlapping mode, the battery cores (100) are square battery cores, a battery core insulation protection structure is arranged on the outer surface of a shell of each battery core (100), an insulation partition plate (300) is clamped between any two adjacent battery cores (100) which are arranged in the overlapping mode, and the insulation partition plate (300) is used for insulating and isolating the opposite maximum end faces of the two adjacent battery cores (100);
the battery core (100) is provided with a length d, a width k and a thickness h, the length d of the battery core (100) is greater than the width k, the width k of the battery core (100) is greater than the thickness h, and the maximum end faces of the battery core (100) and the battery core (100) which are arranged in a stacked mode are oppositely arranged;
the electric core insulation protection structure is used for insulation protection of the outer surface of the shell and comprises an insulation layer (200) coated on the outer surface of the shell, an area covered by the insulation layer (200) comprises an edge serving as a reference of the maximum end face of the electric core (100), and areas extending to end faces of two sides of the edge by a distance a respectively, wherein the edge of the maximum end face of the electric core (100) does not comprise an edge shared by the end faces of electrodes (101) of the electric core (100), the distance a is larger than (0.0625U + 2.5) and smaller than a width k, U is a voltage value of an electric energy storage unit or a voltage value of a battery module or a voltage difference value arranged in an overlapping mode between the electric cores (100), and the unit of U is V, and the unit of d, k, h and a is mm.
2. The electrical energy storage unit of claim 1, wherein:
the distance a is between 2 and 65 and the unit of a is mm.
3. The electrical energy storage unit of claim 1, wherein:
the insulating layer (200) is formed by a pasted insulating film, the battery cell (100) is provided with a single electrode end face positioned at the top, and:
when the thickness 2a is smaller than the thickness h, wrapping the edges of the largest end faces of the two sides of the battery core (100) by using two insulating films so as to partially wrap the side end faces and the bottom end faces of the battery core (100) adjacent to the largest end faces;
when the thickness 2a is larger than or equal to the thickness h, a strip of the insulating film with the width of (2 a + h) is used for coating, so that the side end face and the bottom end face of the battery core (100) adjacent to the largest end face are completely coated;
and the units of a and h are both mm.
4. The electrical energy storage unit of claim 3, wherein:
the insulating film with the position that the biggest terminal surface bottom apex angle of electricity core (100) corresponds has symmetrical dog-ear district Z, and in one it has the excision district Q of amputation in the dog-ear district Z, and two dog-ear district Z pastes relatively, and passes through excision district Q makes two after pasting dog-ear district Z paste to on the surface of other positions of insulating film, and constitute two dog-ear district Z in the folding of the apex angle position of the biggest terminal surface of electricity core (100).
5. The electrical energy storage unit of claim 1, wherein:
the insulating layer (200) is formed by a pasted insulating film, the battery cell (100) is provided with two electrode end faces which are respectively arranged at two ends, and:
when the thickness 2a is smaller than the thickness h, four insulating films are adopted to coat along the edges of the maximum end surfaces on the two sides of the battery core (100) so as to coat the side end surface part of the battery core (100) adjacent to the maximum end surface;
when the thickness 2a is larger than or equal to the thickness h, a strip of the insulating film with the width of (2 a + h) is used for coating, so that the side end face of the battery core (100) adjacent to the largest end face is completely coated;
and the units of a and h are both mm.
6. The electrical energy storage unit of claim 1, wherein:
the insulating layer (200) is composed of a sprayed insulating material, and:
if the battery cell (100) has a single electrode end surface positioned at the top, partially coating the side end surface and the bottom end surface of the battery cell (100) adjacent to the maximum end surface when 2a is less than the thickness h, and fully coating the side end surface and the bottom end surface of the battery cell (100) adjacent to the maximum end surface when 2a is greater than or equal to the thickness h;
if the battery cell (100) has two electrode end faces respectively arranged at two ends, when the thickness 2a is smaller than the thickness h, the side end face of the battery cell (100) adjacent to the maximum end face is partially coated, and when the thickness 2a is larger than or equal to the thickness h, the side end face of the battery cell (100) adjacent to the maximum end face is completely coated;
and the units of a and h are both mm.
7. The electrical energy storage unit of any one of claims 1 to 6, wherein:
the region covered by the insulating layer (200) further comprises a region, wherein the region extends a distance e to the end face of at least one side of an edge of the electrode end face of the battery cell (100) by taking the edge of the electrode end face of the battery cell as a reference, the distance e is larger than (0.0625U + 2.5) and smaller than a width k, U is a voltage value of the electric energy storage unit, or a voltage of the battery module, or a voltage difference value between adjacent battery cells (100) in a superposed arrangement, the unit of U is V, and the units of k and e are both mm.
8. The electrical energy storage unit of claim 7, wherein:
the distance e is between 2 and 65 and the unit of e is mm.
9. The electrical energy storage unit of claim 1, wherein:
the insulating separator (300) is located in a central area (301) of the middle portion, and an edge area (302) is arranged around the periphery of the central area (301), wherein the thickness of the edge area (302) is smaller than that of the central area (301), the width g of the edge area (302) is larger than a, or the thickness of the edge area (302) is larger than that of the central area (301), and the unit of g and a are both mm.
10. The electrical energy storage unit of claim 1 or 9, wherein:
the insulating partition plate (300) is made of aerogel felts, insulating foam plates or PP plates.
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| CN202011023843.5A CN112259837B (en) | 2020-09-25 | 2020-09-25 | Electric energy storage unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209785984U (en) * | 2019-05-21 | 2019-12-13 | 江苏塔菲尔新能源科技股份有限公司 | Insulating film structure and battery |
| CN210349885U (en) * | 2019-11-07 | 2020-04-17 | 多氟多新能源科技有限公司 | Novel blue membrane diolame structure of lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209785984U (en) * | 2019-05-21 | 2019-12-13 | 江苏塔菲尔新能源科技股份有限公司 | Insulating film structure and battery |
| CN210349885U (en) * | 2019-11-07 | 2020-04-17 | 多氟多新能源科技有限公司 | Novel blue membrane diolame structure of lithium ion battery |
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