CN216597811U - Electricity core monomer, electric core subassembly and battery module - Google Patents

Abstract

The utility model is suitable for the field of power batteries, and provides a battery cell monomer, a battery cell assembly and a battery module. The battery cell monomer comprises a battery cell body and a first plugging portion and/or a second plugging portion which are/is arranged on the end side of the battery cell body in the thickness direction, and the first plugging portion on the battery cell body can be matched with the second plugging portion on the adjacent battery cell body in a plugging manner so as to limit the relative movement of the two adjacent battery cell bodies in the thickness direction. According to the battery cell monomer provided by the utility model, the first insertion part and the second insertion part are arranged, so that two adjacent battery cell monomers can be connected in an insertion manner, the number of parts of a battery module is reduced, the assembly efficiency is improved, and the production and assembly cost of the battery module is further reduced.

Description

Electricity core monomer, electric core subassembly and battery module

Technical Field

The utility model belongs to the field of power batteries, and particularly relates to a battery cell monomer, a battery core assembly and a battery module.

Background

Current battery module is arranged in order by a plurality of electric core structures and is connected formation, and the electric core structure includes the posting and locates the electric core body in the posting. During the assembly, be fixed in the locating frame with electric core body in, the locating frame that will be fixed with electric core body again is arranged in order and is connected, realizes the assembly of battery module. The setting of locating frame occupies the space of battery module, increases battery module weight to increased structure cost of manufacture, increased assembly process, reduced assembly efficiency, and then increased the production assembly cost of battery module.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a single battery cell, a battery cell assembly and a battery module, and aims to solve the problems of high production and assembly cost and low assembly efficiency of the conventional battery module.

In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

in a first aspect, a battery cell monomer includes a battery cell body and a first plugging portion and/or a second plugging portion arranged on an end side of the battery cell body in a thickness direction, where the first plugging portion on the battery cell body can be plugged and matched with the second plugging portion on an adjacent battery cell body to limit relative movement of the two adjacent battery cell bodies in the thickness direction.

Through adopting above-mentioned technical scheme, through the setting of first grafting portion and second grafting portion for two adjacent electric core monomers can be connected with the mode of pegging graft each other, need not fix or cooperate through other supplementary or external structure and connect, thereby can effectively reduce the part quantity of battery module, reduce supplementary or the shared space and weight of external structure, reduce the assembly process, improve assembly efficiency, and then reduce the production assembly cost of battery module.

Optionally, the number of the first insertion parts and the number of the second insertion parts are multiple, and at least one first insertion part and one second insertion part are arranged on the same side of any one of the cell bodies.

Through adopting above-mentioned technical scheme, two adjacent electric core monomers exist two hookup locations, and are favorable to improving two electric core monomers and connect the steadiness.

The second aspect, a cell subassembly, includes a plurality of electric core monomers of arranging in order along thickness direction, will two adjacent electric core monomers be named first monomer and second monomer respectively, and first monomer is equipped with first grafting portion towards the second monomer surface, and the second monomer is equipped with the second grafting portion towards first monomer surface, and first grafting portion and second grafting portion are pegged graft the cooperation and are injectd first monomer and second monomer at thickness direction's relative movement.

Through adopting above-mentioned technical scheme, can effectively reduce the part quantity of battery module, reduce supplementary or the shared space and weight of exterior structure spare, reduce the assembly process, improve assembly efficiency, and then reduce the production assembly cost of battery module.

Optionally, the surface of the first inserting portion facing the second monomer is provided with an inserting groove matched with the second inserting portion, the groove opening of the inserting groove extends along the width direction of the first monomer, the inserting groove is provided with a first groove end, and the first groove end is communicated with the outside to enable the second inserting portion to be placed in from the width direction of the first monomer.

Through adopting above-mentioned technical scheme, simplify the structure and convenient assembly.

Optionally, the insertion groove has a second groove end opposite to the first groove end, a limiting sealing edge is arranged at the second groove end, and the limiting sealing edge limits the second insertion part arranged in the insertion groove to leave the insertion groove through the second groove end.

Through adopting above-mentioned technical scheme, peg graft the assembly in order and form a whole at a plurality of electric core monomers to when shifting this whole, can maintain its relative quiescent state between each electric core monomer, and need not other supplementary fixed work, facilitate for the assembly operation of battery package.

Optionally, the surface of the first inserting portion facing the second monomer is provided with an inserting groove matched with the second inserting portion, the groove opening of the inserting groove extends along the length direction of the first monomer, the inserting groove is provided with a first groove end, and the first groove end is communicated with the outside to enable the second inserting portion to be placed in from the length direction of the first monomer.

Through adopting above-mentioned technical scheme, simplify the structure and convenient assembly.

Optionally, the cross-sectional shape of the insertion groove is T-shaped, and the second insertion portion is arranged in cooperation with the insertion groove.

Through adopting above-mentioned technical scheme, adopt T shape cross-section design, can increase the area of contact of inserting groove and second grafting portion to restrict two first monomers and the degree of freedom of second monomer in the thickness direction, be favorable to the compact cooperation of first grafting portion and second grafting portion, simple structure, it is with low costs.

Optionally, the first inserting portion is provided with a buffer pad at the bottom of the inserting groove.

Through adopting above-mentioned technical scheme, when alleviating first monomer and the assembly of second monomer, the impact of second grafting portion to first grafting portion plays the effect of protection to electric core body.

Optionally, the number of the first plugging parts is multiple, and the number of the second plugging parts is multiple.

Through adopting above-mentioned technical scheme, there are two hookup location in first monomer and second monomer, and be favorable to improving two electric core monomers and connect the steadiness.

In a third aspect, a battery module includes the above-described cell assembly.

Through adopting above-mentioned technical scheme, a plurality of electric core monomers are arranged in order along the fore-and-aft direction, and two adjacent electric core monomers need not fix or cooperate through other supplementary or external structure spare through relative first grafting portion and the second grafting portion plug-in connection that sets up to can effectively reduce the part quantity of battery module, reduce supplementary or the shared space and weight of external structure spare, reduce the assembly process, improve assembly efficiency, and then reduce the production assembly cost of battery module. The assembly quantity of the battery cell monomers is adjusted according to the space of the battery module, and the assembly quantity is flexible.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described 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 that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram illustrating assembly of a plurality of battery cells according to an embodiment of the present invention;

fig. 2 is a first schematic diagram of a cell unit according to an embodiment of the present invention;

fig. 3 is a second schematic diagram of a battery cell according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an assembly relationship between two battery cell units in the embodiment of the present invention;

fig. 5 is a schematic diagram of a connection state of two battery cells in an embodiment of the present invention;

FIG. 6 is a cross-sectional view of the structure of FIG. 5;

fig. 7 is a schematic diagram of a partial structure of a cell unit according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a partial structure of a battery cell unit according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10. a battery cell monomer; 11. a cell body; 12. a first insertion part; 13. a second insertion part; 121. inserting grooves; 122. and (6) limiting and sealing edges.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 8, a cell unit 10 provided in the present application, and a cell assembly and a battery module using the cell unit 10 are now described.

Referring to fig. 2 and fig. 3, the cell unit 10 includes a cell body 11 and a first insertion portion 12 and/or a second insertion portion 13 provided on an end side of the cell body 11 in a thickness direction. Fig. 2 and 3 each show a view of one cell unit 10 from two perspectives, in order to show the structure of the second plug part 12 and the third plug part 13. Referring to fig. 4 to fig. 6, the first plugging portion 12 on the cell body 11 can be plugged and matched with the second plugging portion 13 on the adjacent cell body 11 to limit the relative movement of the two adjacent cell bodies 11 in the thickness direction.

The cell body 11 has a plate shape, and for convenience of description, the length direction of the cell body 11 is defined as a left-right direction, the width direction is defined as an up-down direction, and the thickness direction is defined as a front-back direction.

For convenience of description, two adjacent cell units 10 are distinguished and named as a first unit and a second unit. The surface of the first monomer facing the second monomer is provided with a first inserting portion 12, the surface of the second monomer facing the first monomer is provided with a second inserting portion 13, and the first inserting portion 12 and the second inserting portion 13 are inserted and matched to limit the relative movement of the first monomer and the second monomer in the thickness direction.

The first inserting portion 12 and the second inserting portion 13 are arranged in pairs and are respectively arranged on two sides of the thickness of the cell body 11. Or, in two adjacent electric core monomers 10, first inserting parts 12 are arranged on both sides of the first monomer, second inserting parts 13 are arranged on both sides of the second monomer, and the first inserting parts 12 and the second inserting parts 13 are arranged in pair.

Referring to fig. 5, the distances between the first plugging portion 12 and the second plugging portion 13 in the length direction (left-right direction) of the battery cell body 11 are the same, so that in a state where the first plugging portion 12 of the first cell is plugged and fitted with the second plugging portion 13 of the second cell, the first cell and the second cell are flush, that is, the left surface of the first cell and the left surface of the second cell are flush, and the right surface of the first cell and the right surface of the second cell are flush.

It is understood that the battery cell 10 further includes two tabs disposed on the battery cell body 11, and in the structure shown in fig. 1, the two tabs are located on the same side of the battery cell body 11 in the length direction.

The battery cell units 10 provided in this embodiment can be connected in a manner of being plugged into each other through the arrangement of the first plugging portion 12 and the second plugging portion 13. A plurality of electric core monomers 10 are arranged along the fore-and-aft direction in order, and the electric core body 11 of two adjacent electric core monomers 10 is through relative first grafting portion 12 and the 13 grafting connection of second grafting portion that sets up to restrict its removal in fore-and-aft direction, make a plurality of electric core monomers 10 connect and become an organic whole, constitute the essential part of battery module. In other words, each of the battery cell units 10 is connected to each other only by the first inserting portion 12 and the second inserting portion 13 in a matching manner, and does not need to be fixed or connected in a matching manner by other auxiliary or external structural members, so that the number of parts of the battery module can be effectively reduced, the space and the weight occupied by the auxiliary or external structural members are reduced, the assembly process is reduced, the assembly efficiency is improved, and the production and assembly cost of the battery module is reduced.

In addition, the assembly quantity of the battery cell units 10 is adjusted according to the space of the battery module, and the assembly quantity is flexible. After the battery modules are grouped, the battery packs are assembled by connecting the battery modules. At this moment, the first inserting part 12 of the single battery cell 10 positioned at the head part of the battery module is inserted and matched with the second inserting part 13 of the single battery cell 10 positioned at the tail part of another battery module, so that the connection of the battery module assembly is realized without auxiliary or external structural parts, the assembly is convenient, and the production and assembly cost is effectively reduced.

The first single body and the second single body are in a state of limiting movement in the front-rear direction by the insertion and engagement of the first insertion portion 12 and the second insertion portion 13. However, it is not required that the two corresponding battery cell units 10 achieve the effect of limiting movement in the vertical or horizontal direction when the first inserting-connecting part 12 and the second inserting-connecting part 13 are inserted. In combination with the assembly of the battery pack, after each battery cell unit 10 is sequentially inserted and connected and is integrally transferred into the box body of the battery pack, if the battery pack has a freedom of movement in the vertical or horizontal direction, the freedom of movement can be limited by the box body structure of the battery pack, and a fixing effect is achieved.

It explains again that current electric core structure includes electric core body and the location frame that is used for fixed electric core body, and after the location frame fixed connection of electric core body formed electric core structure, a plurality of electric core structures were arranged in order and were connected, realized the assembly of battery module. The plurality of battery modules are arranged in the battery pack box structure. In other words, the fixation of the cell body in the conventional battery pack is irrelevant to the case structure. In this scheme, each battery cell 10 in the battery module is relatively fixed in the front-back direction, and may be in a movable or fixed state in other directions. When each of the battery cells 10 is in an active state, the battery pack box structure plays a role in fixing the battery cells 10.

In this embodiment, referring to fig. 2 and fig. 3, a plurality of first plugging portions 12 are arranged at intervals on the same side of the cell body 11, and a plurality of second plugging portions 13 are arranged at intervals on the other side of the cell body 11. In other words, the surface of the first single body facing the second single body is provided with a plurality of first inserting parts 12, and the surface of the second single body facing the first single body is provided with a plurality of second inserting parts 13. Under this setting, during first monomer and the single grafting connection of second, there are a plurality of hookup location between first monomer and the second monomer, and be favorable to improving first monomer and the free connection steadiness of second. In the illustrated structure, the number of the first mating part 12 and the second mating part 13 is two. Preferably, two first inserting parts 12 are respectively arranged near two ends of the cell body 11, and two second inserting parts 13 are also respectively arranged near two ends of the cell body 11, so as to further improve the connection stability of the first monomer and the second monomer. It can be understood that a plurality of first inserting portions 12 may be disposed on both sides of the first single cell body 11, a plurality of second inserting portions 13 may be disposed on both sides of the second single cell body 11, and the first inserting portions 12 and the second inserting portions 13 opposite to each other are inserted and matched to realize the insertion and connection of the first single cell and the second single cell.

In another embodiment, there are a plurality of the first inserting-connecting parts 12 and the second inserting-connecting parts 13, and at least one first inserting-connecting part 12 and one second inserting-connecting part 13 are disposed on one side of any one of the cell bodies 11. In other words, the surface of the first single body facing the second single body is provided with at least one first plug-in part 12 and at least one second plug-in part 13, and the surface of the second single body facing the first single body is provided with at least one first plug-in part 12 and at least one second plug-in part 13. Under this setting, during first monomer and the single grafting connection of second, there are a plurality of hookup location between first monomer and the second monomer, and be favorable to improving first monomer and the free connection steadiness of second.

In another embodiment of the present application, please refer to fig. 7, a surface of the first plugging portion 12 away from the cell body 11 is provided with a plugging groove 121 engaged with the second plugging portion 13, a notch of the plugging groove 121 extends along a width direction of the cell body 11, the plugging groove 121 has a first groove end, the first groove end penetrates through a side surface of the first plugging portion 12 along the width direction of the cell body 11 (is communicated with the outside), and the first groove end is used for the second plugging portion 13 of another cell unit 10 to be inserted into the cell body 11 from one side of the width of the cell body 11.

The connection direction is defined, when the first inserting portion 12 is located on the front side surface of the cell body 11, the inserting groove 121 is opened on the front side surface of the first inserting portion 12, the extending direction of the inserting groove 121 is the vertical extending direction, and the inserting groove 121 extends upward to the upper surface of the first inserting portion 12, so that the second inserting portion 13 of another cell unit 10 can enter the inserting groove 121 through the first groove end from above the first inserting portion 12. It is understood that the insertion groove 121 may also be configured to extend downward to the lower surface of the first insertion part 12, so that the second insertion part 13 of another cell unit 10 can be inserted from below.

The notch of the insertion groove 121 extends upward to the upper surface of the first insertion part 12, please refer to fig. 4 to fig. 6 together, fig. 4 shows a schematic view of an assembly relationship between two adjacent battery cells 10, fig. 5 shows a schematic view of a connection between two adjacent battery cells 10 after assembly, and fig. 6 shows a cross-sectional view of two assembled battery cells 10 after assembly. During assembly, the second inserting part 13 of the second monomer is placed into the inserting groove 121 from the upper part of the first inserting part 12 of the first monomer, so that the assembly of the first monomer and the second monomer can be completed, and the operation is very convenient. In addition, the insertion groove 121 extends up and down, and the peripheral side groove wall of the insertion groove 121 of the first single body limits the movement of the second insertion part 13 of the second single body in the front-back and left-right directions, so that the first single body and the second single body are prevented from shaking in the left-right direction to avoid inconvenient carrying and transferring.

Preferably, referring to fig. 7 and 8, the insertion groove 121 has a second groove end opposite to the first groove end, the first insertion part 12 is provided with a limiting sealing edge 122 at the second groove end, and the limiting sealing edge 122 limits the second insertion part 13 placed in the insertion groove 121 to leave the insertion groove 121 through the second groove end.

In combination with the actual assembly environment, after the second inserting part 13 of the second single body is placed into the inserting groove 121, the lower surface of the second inserting part 13 abuts against the limit sealing edge 122 and is supported by the limit sealing edge 122. At this time, the first single body and the second single body are relatively fixed in the left-right and front-back directions, and the limiting seal edge 122 limits the downward moving freedom degree of the second single body in the up-down direction. Although the second monomer still has the freedom of upward movement, the second monomer and the first monomer are in a relatively static state under the action of non-external force due to the gravity. When a plurality of battery cell monomers 10 are sequentially inserted and assembled to form a whole and the whole is transferred, the battery cell monomers 10 can be maintained in a relatively static state without other auxiliary fixing work, thereby providing convenience for the assembly operation of the battery pack.

Preferably, referring to fig. 5, when the second plugging portion 13 of the second cell abuts against the limit edge 122, the upper surface of the cell body 11 of the second cell is coplanar with the upper surface of the cell body 11 of the first cell, and the lower surface of the cell body 11 of the second cell is coplanar with the lower surface of the cell body 11 of the first cell. This setting for each electric core monomer 10 pegs graft in order and cooperates the back, and the electric core body 11 of each electric core monomer 10 is in same horizontal position, reaches the effect of automatic alignment, thereby facilitates the assembly of battery module.

In another embodiment of this application, a surface of the first plugging portion 12 that deviates from the battery cell body 11 is provided with a plugging groove 121 that is matched with the second plugging portion 13, a notch of the plugging groove 121 extends along a length direction of the battery cell body 11, and the plugging groove 121 has a through hole that penetrates through to one side of the first plugging portion 12 along the length direction of the battery cell body 11 so as to place the second plugging portion 13 of another battery cell unit 10 into the battery cell from one side of the first plugging portion 12.

The insertion groove 121 is opened on the surface of the first insertion part 12 departing from the cell body 11 and extends along the left-right direction. The insertion groove 121 has a first groove end and a second groove end, and the first groove end extends leftward to the left side surface of the first insertion part 12, so that the second insertion part 13 of the second single body can be inserted into the insertion groove 121 from the left side of the first insertion part 12 through the first groove end. It is understood that the first slot end may also be arranged to extend rightward to the right side surface of the first insertion part 12, so that the second insertion part 13 of the second single body can be inserted into the insertion slot 121 from the right side of the first insertion part 12 through the first slot end.

Preferably, the second slot end is not communicated with the outside, and the slot wall at the second slot end limits the second inserting part 13 of the second single body to leave the inserting slot 121 through the second slot end. When the second slot end is the right end of the inserting slot 121, the inserting slot 121 of the first single body limits the movement of the second single body in the forward, backward, upward, downward and rightward directions, and only has the freedom of movement in the leftward direction.

In this embodiment, referring to fig. 6, the cross-sectional shape of the insertion groove 121 is a T-shape. The second inserting portion 13 is matched with the inserting groove 121, the cross section of the second inserting portion is in a T shape formed by connecting a web plate and a wing plate, and two opposite ends of the web plate are respectively connected with the battery cell body 11 and the wing plate. The second mating portion 13 is disposed to mate with the mating groove 121. When the second inserting portion 13 of the second single body is placed in the inserting groove 121 of the first single body, the wing plate abuts against the groove wall of the inserting groove 121 to restrict the movement of the second single body in the front-rear direction, so that the first single body and the second single body are relatively fixed in the front-rear direction. By adopting the design of the T-shaped cross section, the contact area between the insertion groove 121 and the second insertion part 13 can be increased, the freedom of the two battery cell monomers 10 in the front-back direction is limited, the compact matching of the first insertion part 12 and the second insertion part 13 is facilitated, the structure is simple, and the cost is low. In other embodiments, the cross-section of the insertion groove 121 and the second insertion part 13 may also be semicircular, i-shaped, half-i-shaped or other shapes, which are not limited herein.

In another embodiment of the present application, the first plug-in part 12 is provided with a buffer pad at the bottom of the plug-in groove 121. The blotter has elasticity, and when first monomer and second monomer assembly can be alleviated, second grafting portion 13 plays the effect of protection to electric core body 11 to the impact of first grafting portion 12. Preferably, the cushion is made of a rubber material.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides an electric core monomer, its characterized in that includes electric core body and locates electric core body thickness direction's distolateral first grafting portion and/or second grafting portion, on the electric core body first grafting portion can with adjacent on the electric core body second grafting portion is pegged graft mutually and is cooperated with spacing adjacent two electric core body is at thickness direction's relative movement.

2. The battery cell of claim 1, wherein the number of the first insertion-connection parts and the number of the second insertion-connection parts are plural, and at least one first insertion-connection part and one second insertion-connection part are disposed on the same side of any one of the battery cell bodies.

3. The utility model provides an electric core subassembly, its characterized in that includes a plurality of electric core monomers of arranging in order along thickness direction, will adjacent two electric core monomers are named first monomer and second monomer respectively, first monomer orientation second monomer's surface is equipped with first grafting portion, second monomer orientation first monomer's surface is equipped with second grafting portion, first grafting portion with the cooperation of pegging graft of second grafting portion and injects first monomer with the relative movement of second monomer in thickness direction.

4. The plug assembly according to claim 3, wherein the surface of the first plug part facing the second single body is provided with a plug groove matched with the second plug part, the notch of the plug groove extends along the width direction of the first single body, the plug groove is provided with a first groove end, and the first groove end is communicated with the outside so that the second plug part can be inserted from the width direction of the first single body.

5. The electrical core assembly of claim 4, wherein the plug channel has a second channel end opposite the first channel end, the second channel end having a limit seal disposed thereon, the limit seal limiting the second plug portion disposed in the plug channel from exiting the plug channel through the second channel end.

6. The plug assembly according to claim 4, wherein the surface of the first plug part facing the second single body is provided with a plug groove matched with the second plug part, the notch of the plug groove extends along the length direction of the first single body, the plug groove is provided with a first groove end, and the first groove end is communicated with the outside so that the second plug part can be inserted from the length direction of the first single body.

7. The electrical core assembly of any one of claims 4 to 6, wherein the cross-sectional shape of the plug groove is T-shaped, and the second plug portion is arranged to cooperate with the plug groove.

8. The electrical core assembly of any one of claims 4 to 6, wherein the slot bottom of said insertion slot is provided with a cushion.

9. The electrical core assembly of any one of claims 3 to 6, wherein the first plug part is plural in number and the second plug part is plural in number.

10. A battery module comprising the cell unit of claim 1 or 2, or the cell assembly of any one of claims 3 to 9.

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