CN215184195U - Electric core group and power battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides an electric core group and a power battery, the electric core group comprises a fixed support and a plurality of electric cores which are stacked in sequence, the fixed support comprises a fixed outer frame, and a first fixed plate and a second fixed plate which are arranged at intervals relatively, the first fixed plate, the second fixed plate and each electric core are all fixedly arranged in the fixed outer frame, the first fixed plate is provided with a plurality of first slots which are arranged at intervals in sequence along the stacking direction of each electric core, the second fixed plate is provided with a plurality of second slots which are arranged at intervals in sequence along the stacking direction of each electric core, one side part of each electric core is inserted into the corresponding first slot, the other side part is inserted into the corresponding second slot, the electric core group adopting the fixed support can form a gap between each electric core and the electric core, thus, the contact area between each electric core and an insulating cooling medium can be effectively increased, and the heat dissipation effect to each electric core is improved, therefore, the heat dissipation performance of the power battery is effectively improved.

Description

Electric core group and power battery

Technical Field

The utility model relates to the technical field of batteries, especially, provide a core group and power battery.

Background

Along with the continuous popularization of electric automobile, people require higher and higher to electric automobile's duration, but along with electric automobile's duration promotion, power battery's the heat production volume also can increase thereupon, consequently, need adopt effectual technological means to dispel the heat to power battery.

At present, power batteries adopting a heat dissipation mode of directly contacting an insulating cooling medium with a battery core gradually appear in the market, the heat dissipation performance of the power batteries can be improved by improving the heat conduction efficiency in the heat dissipation mode, but the heat dissipation performance of the power batteries still cannot meet the expected requirement due to the small contact area between the insulating cooling medium and the battery core.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a core group and power battery, the technical problem that the heat dispersion that aims at solving current power battery is poor.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions: the utility model provides an electric core group, include fixed bolster and a plurality of electric cores of piling up in proper order, the fixed bolster includes fixed frame, and first fixed plate and the second fixed plate that relative interval set up, first fixed plate, second fixed plate and each electric core all set up in fixed frame fixedly, a plurality of first slots of interval arrangement in proper order along the pile direction of each electric core are seted up to first fixed plate, a plurality of second slots of interval arrangement in proper order along the pile direction of each electric core are seted up to the second fixed plate, a side portion of each electric core inserts in the first slot that corresponds and another lateral part inserts in the second slot that corresponds.

The embodiment of the utility model provides a cell group has following beneficial effect at least: after the power battery is assembled, each electric core part or the whole is soaked in the insulating cooling medium, one side part of each electric core is respectively inserted into each first slot of the first fixing plate, and the other side part of each electric core is respectively inserted into each second slot of the second fixing plate, so that a gap is formed between each electric core and each electric core, the insulating cooling medium can enter the gap and is contacted with each electric core, and the heat generated by each electric core is taken away, so that the contact area between each electric core and the insulating cooling medium can be effectively increased, the heat dissipation effect on each electric core is improved, and the heat dissipation performance of the power battery is effectively improved.

In one embodiment, the fixing frame has two opposite opening ends, and each of the first slots of the first fixing plate and each of the second slots of the second fixing plate extend from one opening end of the fixing frame to the other opening end.

By adopting the technical scheme, the lugs of each battery cell can be effectively led out.

In one embodiment, the fixing bracket includes a plurality of first fixing plates sequentially disposed between two opposite sidewalls of the fixing frame and a plurality of second fixing plates sequentially disposed between two opposite sidewalls of the fixing frame, and each of the first fixing plates and each of the second fixing plates are disposed in one-to-one correspondence.

Through adopting above-mentioned technical scheme, under the prerequisite of guaranteeing the structural stability of single electric core group, can effectively reduce the quantity that sets up of fixed frame and increase the quantity that sets up of electric core, effectively improve power battery's energy density to improve electric automobile's continuation of the journey performance.

In one embodiment, one side of each first fixing plate is provided with a first connecting part, the other side of each first fixing plate is provided with a second connecting part, and the first connecting part of one first fixing plate is connected with the second connecting part of the other first fixing plate; one side of each second fixing plate is provided with a third connecting part, the other side of each second fixing plate is provided with a fourth connecting part, and the third connecting part of one second fixing plate is connected with the fourth connecting part of the other second fixing plate.

Through adopting above-mentioned technical scheme, effectively improve the wholeness of fixed bolster to can further improve the structural stability of electric core group.

In one embodiment, each of the first connecting portions and each of the second connecting portions are fastening portions, and the fastening direction of the first connecting portions is opposite to the fastening direction of the second connecting portions; and/or each third connecting part and each fourth connecting part are buckling parts, and the buckling direction of the third connecting part is opposite to that of the fourth connecting part.

Through adopting above-mentioned technical scheme, effectively improve the assembly convenience of electric core group.

In one embodiment, at least one side of the fixing frame protrudes outwards to form an abutting part.

By adopting the technical scheme, the two adjacent electric core groups in the power battery are effectively separated, and a gap for the inflow of the insulating cooling medium is formed between the two adjacent electric core groups, so that the contact area between the insulating cooling medium and each electric core group is increased, and the heat dissipation performance of the power battery is further improved.

In one embodiment, a temperature equalization plate is arranged between two adjacent battery cells.

By adopting the technical scheme, the temperature deviation on the surface of the battery cell can be effectively reduced, and meanwhile, each battery cell can be further fixed.

In one embodiment, each first slot of the first fixing plate is provided with a first buffer member; and/or a second buffer piece is arranged in each second slot of the second fixing plate.

Through adopting above-mentioned technical scheme, can effectively cushion the impact between each electric core and the fixed bolster, avoid each electric core to receive the collision and strike and take place to damage, effectively play the guard action to each electric core.

In one embodiment, the first fixing plate is a plastic plate; and/or the second fixing plate is a plastic plate.

By adopting the technical scheme, the weight of the electric core group is effectively reduced, and the energy density of the power battery is improved, so that the cruising performance of the electric automobile is improved.

In order to achieve the above object, the utility model also provides a power battery, including battery box and a plurality of above-mentioned electric core group, the battery box has the holding chamber that is used for the insulating coolant of holding, and each electric core group homogeneous holding is in the holding intracavity of battery box.

Since the power battery adopts all the embodiments of the electric core assembly, at least all the advantages of the embodiments are achieved, and no further description is given here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a power battery provided in an embodiment of the present invention;

FIG. 2 is an exploded view of the power cell of FIG. 1;

FIG. 3 is a front view of the electric core assembly of the power battery shown in FIG. 2;

fig. 4 is a schematic structural view of a first fixing plate in the electric core pack shown in fig. 3;

fig. 5 is a schematic structural view of a second fixing plate in the electric core pack shown in fig. 3.

Wherein, in the figures, the respective reference numerals:

10. the power battery comprises a power battery body, 11, a battery cell group, 111, a fixing support, 1111, a first fixing plate, 1112, a second fixing plate, 1113, a first slot, 1114, a second slot, 1115, a fixing outer frame, 1116, a butting part, 1117a, a first connecting part, 1117b, a second connecting part, 1118a, a third connecting part, 1118b, a fourth connecting part, 112, a battery cell, 12, a battery box, 121, a box body, 1211, an accommodating cavity, 1212, a liquid inlet, 1213, a liquid outlet, 122, a box cover, 13 and a battery management module.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 and 2, a power battery 10 includes a battery box 12 and a plurality of electric core assemblies 11, the battery box 12 includes a box body 121 and a box cover 122, the box body 121 has an accommodating cavity 1211 for accommodating an insulating cooling medium, wherein the insulating cooling medium is a fluorinated cooling liquid, the box cover 122 is covered on the box body 121 to close the accommodating cavity 1211, each electric core assembly 11 is accommodated in the accommodating cavity 1211 of the box body 121, and each electric core assembly 11 is in direct contact with the insulating cooling medium to achieve the purpose of dissipating heat of each electric core assembly 11, thereby effectively improving the heat dissipation performance of the power battery 10.

Specifically, as shown in fig. 2, the box 121 has a liquid inlet 1212 and a liquid outlet 1213 that are communicated with the accommodating cavity 1211, and the liquid inlet 1212 and the liquid outlet 1213 are respectively communicated with a liquid outlet end and a liquid inlet end of the cooling system of the electric vehicle, so that the insulating cooling medium circularly flows in the accommodating cavity 1211 under the driving action of the cooling system of the electric vehicle, thereby achieving the purpose of dissipating heat of each electric core assembly 11.

Specifically, as shown in fig. 2, the power battery 10 further includes a battery management module 13, and the battery management module 13 is accommodated in the accommodating cavity 1211 of the case 121, so that the battery management module 13 directly contacts with the insulating cooling medium to dissipate heat of the battery management module 13, thereby further improving heat dissipation performance of the power battery 10.

The above-mentioned electric core assembly 11 will be described in detail with reference to the accompanying drawings.

Referring to fig. 3 to 5, an electric core assembly 11 includes a fixing bracket 111 and a plurality of electric cores 112 stacked in sequence, the fixing bracket 111 includes a fixing outer frame 1115, and a first fixing plate 1111 and a second fixing plate 1112 disposed at an interval, the first fixing plate 1111, the second fixing plate 1112 and each electric core 112 are all fixedly disposed in the fixing outer frame 1115, the first fixing plate 1111 is provided with a plurality of first slots 1113 disposed at intervals in sequence along a stacking direction of each electric core 112, the second fixing plate 1112 is provided with a plurality of second slots 1114 disposed at intervals in sequence along the stacking direction of each electric core 112, one side of each electric core 112 is inserted into the corresponding first slot 1113, and the other side is inserted into the corresponding second slot 1114.

After the power battery 10 is assembled, each electric core 112 is partially or wholly soaked in the insulating cooling medium, a gap is formed between each electric core 112 and each electric core 112 by respectively inserting one side portion of each electric core 112 into each first slot 1113 of the first fixing plate 1111 and respectively inserting the other side portion of each electric core into each second slot 1114 of the second fixing plate 1112, and the insulating cooling medium can enter the gap and contact with each electric core 112 to take away heat generated by each electric core 112, so that the contact area between each electric core 112 and the insulating cooling medium can be effectively increased, the heat dissipation effect on each electric core 112 is improved, and the heat dissipation performance of the power battery 10 is effectively improved.

In this embodiment, please refer to fig. 3, the fixing frame 1115 has two opposite opening ends, and each of the first slots 1113 of the first fixing plate 1111 and each of the second slots 1114 of the second fixing plate 1112 extend from one opening end of the fixing frame 1115 to the other opening end. By adopting the technical scheme, the tabs of the battery cells can be effectively led out from the corresponding opening ends.

After the assembly operation of the power battery 10 is completed, the insulating cooling medium flows into the gaps between the battery cells 112 from one opening end of the fixing outer frame 1115, and then flows out from the other opening end of the fixing outer frame 1115, so that the battery cells 112 in the battery core group 11 are directly contacted and radiated, and the radiating effect is good.

Specifically, as shown in fig. 3, the fixing bracket 111 includes a plurality of first fixing plates 1111 sequentially disposed between two opposite sidewalls of the fixing frame 1115 and a plurality of second fixing plates 1112 sequentially disposed between two opposite sidewalls of the fixing frame 1115, and each of the first fixing plates 1111 and each of the second fixing plates 1112 are disposed in a one-to-one correspondence manner. With electric core 112 assembly of a certain amount be a sub electric core group between a first fixed plate 1111 and a second fixed plate 1112, through adopting above-mentioned technical scheme, can be with the fixed setting of a plurality of sub electric core groups in a fixed frame 1115, under the prerequisite of guaranteeing single electric core group 11's structural stability, can effectively reduce the quantity that sets up of fixed frame 1115 and increase electric core 112's the quantity that sets up, effectively improve power battery 10's energy density to improve electric automobile's continuation of the journey performance.

Specifically, as shown in fig. 3 to fig. 5, one side of each of the first fixing plates 1111 is provided with a first connecting portion 1117a and the other side is provided with a second connecting portion 1117b, the first connecting portion 1117a of one first fixing plate 1111 is connected to the second connecting portion 1117b of the other first fixing plate 1111; one side of each second fixing plate 1112 is provided with a third connecting portion 1118a and the other side is provided with a fourth connecting portion 1118b, the third connecting portion 1118a of one second fixing plate 1112 is connected with the fourth connecting portion 1118b of the other second fixing plate 1112, that is, each first fixing plate 1111 is sequentially connected into a whole and each second fixing plate 1112 is sequentially connected into a whole, so that the integrity of the fixing bracket 111 is effectively improved, and the structural stability of the electric core pack 11 can be further improved.

Specifically, as shown in fig. 3 to fig. 5, each of the first connection portions 1117a and each of the second connection portions 1117b are fastening portions, and the fastening direction of the first connection portion 1117a is opposite to the fastening direction of the second connection portion 1117 b; and/or each of the third connecting portions 1118a and the fourth connecting portions 1118b is a snap-fit portion, and the engagement direction of the third connecting portion 1118a is opposite to the engagement direction of the fourth connecting portion 1118 b. Specifically, the first connection portion 1117a is a snap edge disposed at and extending along one side edge of the first fixing plate 1111, and the second connection portion 1117b is a snap edge disposed at and extending along the other side edge of the first fixing plate 1111; the third connecting portion 1118a is a snap edge disposed at and extending along one side edge of the second fixing plate 1112, and the fourth connecting portion 1118b is a snap edge disposed at and extending along the other side edge of the second fixing plate 1112; during assembly, the first connection part 1117a of one first fixing plate 1111 is positively and negatively engaged with the second connection part 1117b of the other first fixing plate 1111, and the third connection part 1118a of one second fixing plate 1112 is positively and negatively engaged with the fourth connection part 1118b of the other second fixing plate 1112, so that the connection operation of each first fixing plate 1111 and the connection operation of each second fixing plate 1112 are completed, the operation is simple and convenient, and the assembly convenience of the electric core assembly 11 is effectively improved.

The connection manner of each first fixing plate 1111 and the connection manner of each second fixing plate 1112 include various connection manners, such as a fastening connection manner, an insertion connection manner, and the like, and are not limited in detail herein.

Specifically, as shown in fig. 3, at least one side of the fixing frame 1115 protrudes outward to form an abutting portion 1116. The abutting part 1116 of the fixing outer frame 1115 abuts against the outer wall of the fixing outer frame 1115 of the adjacent electric core group 11, so that a gap is formed between two adjacent electric core groups 11 in the power battery 10 in a separating manner, and the insulating cooling medium flows into the gap to take away the heat of each electric core group 11, thereby effectively increasing the contact area between the insulating cooling medium and each electric core group 11, and further improving the heat dissipation performance of the power battery 10.

Specifically, the fixing frame 1115 is a plastic frame. By adopting the technical scheme, the weight of the electric core group 11 is effectively reduced, and the energy density of the power battery 10 is improved, so that the cruising performance of the electric automobile is improved.

Of course, the fixing frame 1115 may be a metal frame to further improve the heat dissipation performance of the power battery 10.

In the present embodiment, a temperature equalizing plate (not shown) is disposed between two adjacent battery cells 112. Specifically, each battery cell 112 is attached to the corresponding temperature equalization plate, so that the temperature deviation of the surface of the battery cell can be effectively reduced, and meanwhile, each battery cell can be further fixed.

In this embodiment, each first slot 1113 of the first fixing plate 1111 is provided with a first buffer (not shown), such as a foam pad or a silicone pad; and/or, each second slot 1114 of the second fixing plate 1112 is provided with a second buffer (not shown), such as a foam pad or a silicone pad. Through adopting above-mentioned technical scheme, can effectively cushion the impact between each electric core 112 and the fixed bolster 111, avoid each electric core 112 to receive the collision impact and take place to damage, effectively play the guard action to each electric core 112.

In this embodiment, the first fixing plate 1111 is a plastic plate; and/or the second fixing plate 1112 is a plastic plate. By adopting the technical scheme, the weight of the electric core group 11 is effectively reduced, and the energy density of the power battery 10 is improved, so that the cruising performance of the electric automobile is improved.

Of course, to further improve the heat dissipation performance of the power battery 10, the first fixing plate 1111 and the second fixing plate 1112 may also be metal plates.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides an electric core group, includes fixed bolster and a plurality of electric cores of piling up in proper order, its characterized in that: the fixed support comprises a fixed outer frame, and a first fixed plate and a second fixed plate which are arranged at intervals relatively, the first fixed plate, the second fixed plate and the electric cores are all fixedly arranged in the fixed outer frame, the first fixed plate is provided with a plurality of first slots which are sequentially arranged at intervals along the stacking direction of the electric cores, the second fixed plate is provided with a plurality of second slots which are sequentially arranged at intervals along the stacking direction of the electric cores, one side part of each electric core is inserted into the corresponding first slot, and the other side part of each electric core is inserted into the corresponding second slot.

2. The electric core pack according to claim 1, wherein: the fixed outer frame is provided with two opposite open ends, and each first slot of the first fixed plate and each second slot of the second fixed plate extend from one open end of the fixed outer frame to the other open end.

3. The electric core pack according to claim 1, wherein: the fixed support comprises a plurality of first fixed plates and a plurality of second fixed plates, the first fixed plates are sequentially arranged between two opposite side walls of the fixed outer frame, the second fixed plates are sequentially arranged between two opposite side walls of the fixed outer frame, and the first fixed plates and the second fixed plates are arranged in a one-to-one correspondence mode.

4. The electric core pack according to claim 3, wherein: one side of each first fixing plate is provided with a first connecting portion, the other side of each first fixing plate is provided with a second connecting portion, the first connecting portion of one first fixing plate is connected with the second connecting portion of the other first fixing plate, one side of each second fixing plate is provided with a third connecting portion, the other side of each second fixing plate is provided with a fourth connecting portion, and the third connecting portion of one second fixing plate is connected with the fourth connecting portion of the other second fixing plate.

5. The battery pack according to claim 4, wherein: each first connecting part and each second connecting part are clamping parts, and the clamping direction of the first connecting part is opposite to that of the second connecting part; and/or each third connecting part and each fourth connecting part are buckling parts, and the buckling direction of the third connecting part is opposite to that of the fourth connecting part.

6. The electric core pack according to claim 1, wherein: at least one side of the fixed outer frame protrudes outwards to form an abutting part.

7. The electric core pack according to any one of claims 1-6, wherein: and a temperature equalizing plate is arranged between every two adjacent electric cores.

8. The electric core pack according to any one of claims 1-6, wherein: a first buffer piece is arranged in each first slot of the first fixing plate; and/or a second buffer piece is arranged in each second slot of the second fixing plate.

9. The electric core pack according to any one of claims 1-6, wherein: the first fixing plate is a plastic plate; and/or the second fixing plate is a plastic plate.

10. A power battery, characterized by: the power battery comprises a battery box and a plurality of electric core groups according to any one of claims 1 to 9, wherein the battery box is provided with a containing cavity for containing an insulating cooling medium, and each electric core group is contained in the containing cavity of the battery box.

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