CN211719693U

CN211719693U - Monomer electricity core, electricity core subassembly and battery package

Info

Publication number: CN211719693U
Application number: CN202020684126.6U
Authority: CN
Inventors: 李正哲; 赵江
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-10-20
Anticipated expiration: 2030-04-28

Abstract

The utility model relates to a power battery wraps technical field, provides a monomer electricity core, electric core subassembly and battery package. Monomer electric core include electric core body, electric core body has relative first surface and the second surface that sets up, be equipped with the protrusion unit on the first surface, be equipped with sunken unit on the second surface, one among protrusion unit and the sunken unit forms into anodal utmost point post, another among protrusion unit and the sunken unit forms into negative pole utmost point post, the protrusion unit sets up to cooperate and sunken unit setting up to cooperate with the protrusion unit of another monomer electric core for can cooperateing with another monomer electric core with the sunken unit of another monomer electric core. The utility model discloses a can the lug connection between the monomer electricity core, save the casing, connect the setting of mounting, improve battery package space utilization to can guarantee the compactness of connecting between monomer electricity core, promote the transmission of electricity effect.

Description

Monomer electricity core, electricity core subassembly and battery package

Technical Field

The utility model relates to a power battery wraps technical field, in particular to monomer electricity core, electricity core subassembly and battery package.

Background

With the gradual popularization of electric vehicles, the cruising ability of the electric vehicles is more and more concerned. In recent years, in order to improve the cruising ability of electric vehicles, the design of power battery packs of electric vehicles is also continuously updated in addition to the improvement of battery core materials.

The power battery system is generally formed by connecting a plurality of battery modules in series, wherein the battery cells are assembled into the modules, and then the modules are connected and integrated into a whole pack system. In the above-described assembling process, in order to fix the module, it is generally necessary to use a module case and a connection fixture thereof, thereby wasting a large amount of battery pack space and adding much unnecessary weight.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a can improve space utilization, improve volume energy density and promote monomer electricity core, electric core subassembly and the battery package of transmission of electricity effect after the assembly.

In order to achieve the above object, an aspect of the present invention provides a single battery cell, including a battery cell body, the battery cell body has a first surface and a second surface which are relatively arranged, a protruding unit is disposed on the first surface, a recessed unit is disposed on the second surface, the protruding unit is formed as an anode pole by one of the recessed units, the protruding unit is formed as a cathode pole by another of the recessed units, the protruding unit is disposed to be capable of cooperating with another single battery cell, the recessed unit is disposed to be capable of cooperating with another single battery cell, and the protruding unit is disposed to cooperate with another single battery cell, so as to achieve the connection between the single battery cells.

Optionally, a limiting part capable of limiting the connection direction of the single battery cells is arranged on the protruding unit and/or the recessed unit.

Optionally, the limiting member is made of an elastic conductive material.

Optionally, a first accommodating space is arranged on the protruding unit, a second accommodating space is arranged on the recessed unit, and the first accommodating space and the second accommodating space can jointly limit a space for accommodating the limiting member in a state that the protruding unit and the recessed unit are matched.

Optionally, the retaining member includes a ring spring, and the first accommodating space and the second accommodating space together define an annular groove for accommodating the ring spring.

Optionally, the protruding unit is a cylindrical protrusion protruding outward along the first surface, the recessed unit is a cylindrical groove recessed along the second surface, and the protruding unit and/or the recessed unit are provided with a plurality of ring springs at intervals along a length direction thereof.

The utility model discloses the second aspect provides an electricity core subassembly, arrange including the electric core that the multirow set up side by side, every row electricity core row includes a plurality of above-mentioned arbitrary schemes monomer electricity core, monomer electricity core and its adjacent two pass through between the monomer electricity core protrusion unit with the cooperation of sunken unit is connected.

Optionally, the single battery cells at the ends of the two adjacent rows of battery cells are connected through a bus bar.

Optionally, the electric core assembly includes FPC boards disposed at two ends of the electric core row, the FPC boards are disposed to extend along a direction perpendicular to the arrangement direction of the single electric cores in the electric core row, the number of the bus bars is plural, and the bus bars are connected to the FPC boards through nickel sheets.

The utility model discloses the third aspect provides a battery pack, be in including casing and setting down above-mentioned arbitrary scheme on the casing electric core subassembly, adjacent two rows be equipped with the baffle between the electric core row, the baffle sets up on the casing down.

Compared with the prior art, monomer electricity core have following advantage:

the utility model discloses a monomer electricity core is through setting up protruding unit and sunken unit, and one in protruding unit and the sunken unit forms to anodal utmost point post, another person forms to negative pole post, from this can be through one in the protruding unit of monomer electricity core and the sunken unit and another person in the protruding unit of another monomer electricity core and the sunken unit mutually support, realize that head and the tail between a plurality of monomer electricity cores connect gradually, save the casing, connect the setting of mounting, improve battery package space utilization, improve the long-pending energy density of battery package, and can reduce unnecessary part, weight reduction, and the cost is reduced. Additionally, the utility model discloses a maintenance is conveniently dismantled to monomer electricity core, effectively reduces the maintenance cost simultaneously.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 and fig. 2 are schematic structural diagrams of a single battery cell according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the single cell of the present invention in a connection state;

fig. 4 is a schematic structural diagram of the cell assembly according to an embodiment of the present invention in an assembled state;

fig. 5 is a schematic structural diagram of a battery pack according to an embodiment of the present invention.

Description of reference numerals:

1-electric core body, 2-first surface, 3-second surface, 4-protruding unit, 5-sunken unit, 6-locating part, 7-first accommodation space, 8-second accommodation space, 9-electric core row, 10-busbar, 11-end plate, 12-lower casing, 13-baffle, 14-first monomer electricity core, 15-second monomer electricity core.

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

With reference to fig. 1 and fig. 2, according to an aspect of the present invention, there is provided a single battery cell, including a battery cell body 1, the battery cell body 1 has a first surface 2 and a second surface 3 which are arranged relatively, a protruding unit 4 is arranged on the first surface 2, a recessed unit 5 is arranged on the second surface 3, the protruding unit 4 and one of the recessed units 5 is formed as a positive electrode pole, the protruding unit 4 and the other of the recessed units 5 is formed as a negative electrode pole, the protruding unit 4 is arranged to be able to cooperate with the recessed unit 5 of another single battery cell, and the recessed unit 5 is arranged to be able to cooperate with the protruding unit 4 of another single battery cell, so as to realize connection between the single battery cells.

The utility model discloses a monomer electricity core is through setting up protruding unit and sunken unit, and one of protruding unit and sunken unit forms to anodal utmost point post, another person forms to negative pole post, can be through the protruding unit of adjacent monomer electricity core and the mutually supporting between the sunken unit from this, realize that head and the tail between a plurality of monomer electricity cores connect gradually, save the casing, connect the setting of mounting, improve battery package space utilization, improve the long-pending energy density of battery inclusion, and can reduce the unnecessary part setting, weight reduction, and the cost is lowered.

It should be noted that, when the protruding unit 4 of one cell is a positive electrode terminal, the recessed unit 5 of another cell, which is connected to the protruding unit 4 in a matching manner, is a negative electrode terminal, so that the positive and negative connections between the cells are realized in a concave-convex matching state. On the contrary, when the protruding unit 4 of one cell is a negative electrode post, the recessed unit 5 of another cell, which is connected to the protruding unit 4 in a matching manner, is a positive electrode post. Meanwhile, the protruding unit 4 and the recessed unit 5 are connected in a matched mode, mutual supporting can be achieved in the battery cell connection process, and the purpose of strengthening the battery cell connection structure is achieved.

Furthermore, a limiting part 6 capable of limiting the connection direction of the single battery cells is arranged on the protruding unit 4 and/or the recessed unit 5. Through set up locating part 6 between protruding unit 4 and sunken unit 5, can overcome protruding unit 4 and sunken unit 5 design process produced tolerance to spacing monomer electricity core is carried out on the direction of connection, guarantee the compactness of connecting between monomer electricity core, promote the transmission of electricity effect. Additionally, the utility model discloses a monomer electricity core can conveniently dismantle the maintenance through adopting above-mentioned mode lug connection, effectively reduces the maintenance cost simultaneously. In addition, the side surface of the single battery cell, on which the protruding unit 4 and the recessed unit 5 are mounted, is pasted with insulating paper, that is, the first surface 2 and the second surface 3 are pasted with insulating paper, so as to achieve the purpose of insulating protection.

In the present embodiment, the cell is wound with lamination inside the cell, the protruding unit 4 is formed as a positive electrode terminal, and the recessed unit 5 is formed as a negative electrode terminal. With reference to fig. 2, for example, the connection between two monomer cells is that the concave unit 5 of the first monomer cell 14 matches with the convex unit 4 of the second monomer cell 15, and certainly, along with the increase of the number of the monomer cells, the concave unit 5 of the second monomer cell 15 still matches with the convex unit 4 of other monomer cells, and the convex unit 4 of the first monomer cell 14 can also match with the concave unit 5 of other monomer cells, so that a plurality of monomer cells can be sequentially connected together. Wherein, the use of locating part 6 will carry out spacingly to monomer electricity core on the direction of connection to joint through locating part 6 makes adjacent two the protruding unit 4 and the sunken unit 5 of monomer electricity core closely cooperate together, can overcome the tolerance that produces in protruding unit 4 and the sunken unit 5 design process, and then promote the transmission of electricity effect.

Wherein, locating part 6 needs to adopt the electrically conductive material of elasticity to do benefit to locating part 6 and reach the dual effect of location and transmission of electricity, specifically, can adopt the material of copper alloy or pure copper. Because locating part 6 is the elasticity material, for the installation of locating part 6, promote the compactness that electric core connects, be equipped with first accommodation space 7 on the protruding unit 4, be equipped with second accommodation space 8 on the sunken unit 5, first accommodation space 7 with second accommodation space 8 can protruding unit 4 with it is used for holding to prescribe a limit to jointly under the sunken unit 5 matched with state the space of locating part 6. Understandably, the limiting part 6 is in a compression state in the space defined by the first accommodating space 7 and the second accommodating space 8, so that the purpose of clamping connection is achieved by means of elastic expansion of the limiting part 6 in the defined space, the tightness of connection between the monomer battery cores is realized, and the power transmission effect is improved.

In the present embodiment, in order to facilitate the design and assembly of the limiting member 6, the limiting member 6 comprises a ring spring, and the first accommodating space 7 and the second accommodating space 8 jointly define an annular groove for accommodating the ring spring, so that when the ring spring is snapped in the annular groove, a tight fit between the protruding unit 4 and the recessed unit 5 will be achieved. Further, protruding unit 4 is for following the outside convex cylindrical lug of first surface 2, sunken unit 5 is for following the cylindrical recess that forms is sunken to second surface 3, and then the ring spring can overlap and establish the inner wall of inlaying the cylindrical recess simultaneously at the outer wall of cylindrical lug to promote the zonulae occludens between protruding unit 4 and the sunken unit 5 of two monomer electricity cores.

Of course, more than one ring spring may be disposed between the same set of the matched protruding units 4 and the recessed units 5, and specifically, the protruding units 4 and/or the recessed units 5 may be disposed with a plurality of ring springs at intervals along the length direction thereof. It should be noted that, the length of the protruding unit 4 and the recessed unit 5 is set to be able to set two ring springs at intervals, so as to maintain the protruding unit 4 and the recessed unit 5 designed to be suitable lengths, and at the same time, ensure the connection strength and tightness between the single battery cells. The single battery cell is a square battery, and the protruding unit 4 and the recessed unit 5 are arranged on the longer side face of the square battery, so that the utilization rate of the single battery cell is improved.

With reference to fig. 4, a second aspect of the present invention provides an electric core assembly, which comprises a plurality of rows of parallel electric core rows 9, each row of the electric core rows 9 comprises a plurality of above-mentioned arbitrary schemes, each electric core is adjacent to each other two electric core units, each electric core unit is connected to each other by a protruding unit 4 and a recessed unit 5. That is, each row of the cell rows 9 is formed by sequentially connecting a plurality of single cells end to end. The protruding unit 4 of any single battery cell is connected with the recessed unit 5 of the adjacent single battery cell on one side in a matching manner, and the recessed unit 5 of any single battery cell is connected with the protruding unit 4 of the adjacent single battery cell on the other side in a matching manner.

After the above connection, the protruding units 4 or the recessed units 5 of the unit cells at the end of the cell row 9 are used to connect with the bus bar 10, so as to integrate high-voltage series transmission through the bus bar 10. Specifically, the single cells at the ends of two adjacent rows of the cell rows 9 are connected by a bus bar 10. Certainly, it needs to be ensured that the positive electrode posts and the negative electrode posts of the single electric cores at the end parts of the two adjacent rows of electric core rows 9 are connected through the busbar 10.

If the free end of the monomer battery cell at the end of one battery cell row 9, which is not connected with other monomer battery cells, is an anode pole, the free end of the monomer battery cell at the end of the adjacent battery cell row 9 is a cathode pole, and the anode pole and the cathode pole are connected by using the busbar 10. And the utility model discloses do not do special restriction to anodal utmost point post and negative pole utmost point post for protruding unit 4 still sunken unit 5. In one embodiment, the protruding unit 4 is formed as a positive electrode terminal, and the recessed unit 5 is formed as a negative electrode terminal, so that the protruding units 4 and the recessed units 5 of two single cells at the ends of two adjacent rows of cell rows 9 are connected by a bus bar 10, and in order to better achieve the connection, one end of the bus bar 10 is connected to the protruding unit 4, and the other end is configured to extend into the recessed unit 5 to achieve the connection.

In addition, the electric core assembly comprises FPC boards arranged at two ends of the electric core row 9, the FPC boards are arranged to extend along the direction perpendicular to the arrangement direction of the monomer electric cores in the electric core row 9, the number of the bus bars 10 is multiple, and the bus bars 10 are connected to the FPC boards through nickel sheets so as to realize voltage sampling and transmission of low-voltage signals. Simultaneously, the electric core subassembly is including setting up the end plate 11 at 9 both ends of electric core row, the extending direction of end plate 11 is the same with the extending direction of FPC board to fix a position electric core row 9 through end plate 11, make things convenient for the assembly of electric core subassembly in the battery package.

Because connect through the busbar between traditional monomer electricity core, and the utility model discloses a monomer electricity core can lug connection together through above-mentioned structural design to only need set up at the both ends that electricity core arranged 9 the busbar can, saved busbar connection step from this to a great extent, effectively practice thrift high-tension transmission distance and sampling distance.

With reference to fig. 5, a third aspect of the present invention provides a battery pack, which includes a lower casing 12 and an electric core assembly disposed on the lower casing 12 according to any of the above schemes, wherein two adjacent rows of the electric core assembly are disposed between the electric core rows 9, and the partition 13 is disposed on the lower casing 12. The above-mentioned partition plate 13 is provided between the cell rows 9 for positioning and insulating protection of the cell rows 9. The utility model discloses an among the battery package, through setting up electric core subassembly, save the installation of parts such as module casing, effectively reduce the occupation to the battery package inner space. Simultaneously, because mutually supporting through protruding unit 4 and sunken unit 5 between the monomer electric core, concave-convex structure can also support each other after electric core connects to improve the intensity after electric core connects, be convenient for carry out the load under the state such as receiving the impact, can weaken the effect of crossbeam from this, the setting of adaptability reduction crossbeam, thereby reach further save material's purpose, realize subtracting heavy effect.

In addition, after the battery pack is assembled to the lower case 12, the BMS board and the BDU can be mounted using a vacant space inside the case.

It is worth noting that, in this embodiment, each row of the battery cell rows 9 is arranged to extend along the Y direction of the battery pack, that is, a plurality of single battery cells are connected end to end in the Y direction, and the limiting part 6 and the end plate 11 can jointly play the limiting function of the Y direction, and through the cooperation of the protruding unit 4 and the recessed unit 5 between the adjacent single battery cells, the soft connection is realized and the purpose of connecting the battery cells in series is achieved. And multirow electricity core row 9 upwards piles up arranging at X, utilizes baffle 13 to play X to spacing effect. Of course, in other embodiments, the cell rows 9 may also be arranged to extend along the X direction, and multiple rows of cell rows 9 may be arranged in a stacked manner in the Y direction.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a monomer electricity core, its characterized in that, includes electric core body (1), electric core body (1) has relative first surface (2) and second surface (3) that set up, be equipped with protruding unit (4) on first surface (2), be equipped with on second surface (3) sunken unit (5), protruding unit (4) with one in sunken unit (5) forms into anodal utmost point post, protruding unit (4) with another in sunken unit (5) forms into negative pole utmost point post, protruding unit (4) set up to can with another monomer electricity core sunken unit (5) cooperate and sunken unit (5) set up to cooperate with protruding unit (4) of another monomer electricity core to realize the connection between the monomer electricity core.

2. The cell core according to claim 1, wherein the protruding unit (4) and/or the recessed unit (5) is provided with a limiting member (6) capable of limiting the connection direction of the cell core.

3. The cell core according to claim 2, wherein the retaining member (6) is made of an elastic conductive material.

4. The cell core according to claim 2, wherein a first accommodating space (7) is provided on the protruding unit (4), a second accommodating space (8) is provided on the recessed unit (5), and the first accommodating space (7) and the second accommodating space (8) can jointly define a space for accommodating the limiting member (6) in a state where the protruding unit (4) and the recessed unit (5) are matched.

5. The cell core according to claim 4, wherein the retaining member (6) comprises a ring spring, and the first receiving space (7) and the second receiving space (8) together define an annular groove for receiving the ring spring.

6. The cell core according to claim 5, wherein the protruding unit (4) is a cylindrical protrusion protruding outwards along the first surface (2), the recessed unit (5) is a cylindrical groove recessed along the second surface (3), and a plurality of ring springs are arranged at intervals along the length direction of the protruding unit (4) and/or the recessed unit (5).

7. An electric core assembly, characterized in that it comprises a plurality of rows of electric core rows (9) arranged side by side, each row of electric core rows (9) comprises a plurality of single electric cores according to any one of claims 1 to 6, and the single electric cores are connected with two adjacent single electric cores through the convex units (4) and the concave units (5) in a matching manner.

8. The battery core assembly according to claim 7, wherein the individual cells at the ends of two adjacent rows of cells (9) are connected by a busbar (10).

9. The battery pack assembly according to claim 8, wherein the battery pack assembly comprises FPC boards arranged at two ends of the battery cell row (9), the FPC boards are arranged to extend along a direction perpendicular to the arrangement direction of the single battery cells in the battery cell row (9), the number of the bus bars (10) is multiple, and the multiple bus bars (10) are connected to the FPC boards through nickel sheets.

10. A battery pack, characterized in that it comprises a lower case (12) and the cell assembly of any one of claims 7-9 disposed on the lower case (12), a partition (13) is disposed between two adjacent rows of the cells (9), and the partition (13) is disposed on the lower case (12).