CN217009477U - Battery module assembly and battery module - Google Patents

Abstract

The utility model discloses a battery cell assembly and a battery module, wherein the battery cell assembly comprises: the battery cell is provided with an electrode column; the conducting strip is positioned on the side surface of the battery cell, and an interlayer is superposed between the conducting strip and the battery cell; the conducting strip is provided with a leading-out part, and the leading-out part is led out from the edge of the conducting strip and is used for being electrically connected with the electrode column. According to the battery core assembly, the design of a conventional bus bar is cancelled, the battery core assembly is electrically connected with the battery core through the conducting strip and is arranged on the side surface of the battery core, the structure is simple, the installation is convenient, the battery core assembly can be disassembled and used after being used for a certain time, the problem that the whole battery module is scrapped due to welding single-point welding errors is solved, the safety is better, and the design cost is lower.

Description

Battery module assembly and battery module

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to an electric core assembly and a battery module with the same.

Background

Among the correlation technique, be provided with a plurality of electric cores usually in the battery module, and the electricity is connected between two adjacent electric cores, wherein, the electrode of two adjacent electric cores carries out the electricity and connects and adopt the busbar to carry out the electricity more and connect, but such connected mode, welding list spot welding error after in groups easily leads to whole battery module to scrap, and the welding is accomplished the back detachability poor, has the space of improvement.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a battery assembly, in which the battery cells are electrically connected through the conductive sheet, and the battery assembly has a simple structure, is convenient to install, and can be repeatedly disassembled.

According to an embodiment of the utility model, the electric core assembly comprises: the battery cell is provided with an electrode column; the conducting strip is positioned on the side surface of the battery cell, and an interlayer is superposed between the conducting strip and the battery cell; the conducting strip is provided with a leading-out part, and the leading-out part is led out from the edge of the conducting strip and is used for being electrically connected with the electrode column.

According to the battery core assembly disclosed by the embodiment of the utility model, the design of a conventional bus bar is cancelled, the battery core assembly is electrically connected with the battery core through the conducting strip and is arranged on the side surface of the battery core, the structure is simple, the installation is convenient, the battery core assembly can be disassembled and used after being used for a certain period of time, the problem that the whole battery module is scrapped due to welding single-point welding errors can be avoided, the safety is better, and the design cost is lower.

According to the battery core assembly provided by some embodiments of the utility model, the electrode posts comprise a positive post and a negative post, the number of the conducting plates is two, and the two conducting plates are respectively positioned on two sides of the battery core; and the leading-out part of one of the two conducting strips is electrically connected with the positive pole, and the leading-out part of the other conducting strip is electrically connected with the negative pole.

According to the battery core assembly of some embodiments of the present invention, the positive pole and the negative pole are located on the same surface of the battery core; or the positive pole column and the negative pole column are positioned on different surfaces of the battery core.

According to the battery core assembly of some embodiments of the present invention, the positive electrode posts and the negative electrode posts are located on the same surface of the battery core and are sequentially distributed along the length direction of the surface, and the leading portions of the two conductive sheets are staggered in the width direction of the surface.

According to the electric core assembly of some embodiments of the present invention, the lead-out part is integrally formed with the conductive sheet; or the leading-out part is connected with the conducting strip in a welding mode.

According to the electric core assembly of some embodiments of the present invention, the side surface of the electric core comprises a middle area and an outer peripheral area surrounding the middle area, the outer peripheral area protrudes from the middle area to form an installation space on the side surface of the electric core, and at least parts of the interlayer and the conductive sheet are located in the installation space.

According to the electric core assembly provided by some embodiments of the utility model, the peripheral region is provided with an avoiding gap, an inner wall surface of the avoiding gap is flush with an inner wall surface of the middle region, and the leading-out part is led out of the installation space from the avoiding gap.

According to some embodiments of the core assembly of the present invention, the spacer is configured such that a thickness of the middle portion is less than a thickness of the outer peripheral portion, and/or the spacer is configured such that a density of the middle portion is less than a density of the outer peripheral portion.

The utility model also provides a battery module.

According to the battery module of the embodiment of the utility model, the battery core assembly of any one of the embodiments is arranged.

A battery module according to some embodiments of the present invention includes a plurality of the cell assemblies; wherein, a plurality of electric core subassemblies are followed the thickness direction superpose of electricity core, and adjacent two the conducting strip laminating of electric core subassembly links to each other.

The advantages of the battery module and the above-mentioned cell assembly are the same as those of the prior art, and are not described herein again.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of an electrical core assembly according to an embodiment of the present invention;

FIG. 2 is an exploded view of an electrical core assembly (conductive strips connected to leadouts) according to an embodiment of the utility model;

FIG. 3 is a schematic structural diagram of an electrical core assembly according to an embodiment of the present invention;

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

fig. 5 is a schematic view of connection of a conductive sheet and a lead-out part according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a battery module according to an embodiment of the present invention.

Reference numerals are as follows:

the battery module 100 is provided with a battery case,

the electric core assembly 10 is provided with an electric core,

a cell 1, a positive post 11, a negative post 12, a middle region 13, a peripheral region 14,

the conducting plate 2, the connecting flange 21, the leading-out part 22,

a spacer layer 3.

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 or similar 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Referring to fig. 1-6, a cell assembly 10 according to an embodiment of the present invention is described, in which electrode columns of cells 1 of the cell assembly 10 are electrically connected through conducting strips 2, the structure is simple, the installation is convenient, the design that the cells 1 are detachable is facilitated, the influence of cyclic expansion force on the electrode columns can be effectively avoided, and the safety is better.

As shown in fig. 1 to 6, the electric core assembly 10 according to the embodiment of the present invention includes: cell 1 and conducting strip 2.

The battery cell 1 is provided with an electrode column, the electrode column is used for realizing input and output of current of the battery cell 1, the electrode column is arranged on the surface of the battery cell 1 in a protruding manner, and as shown in fig. 1 and fig. 2, the electrode column is designed in a protruding manner on the upper end face of the battery cell 1.

Conducting strip 2 is located the side of electric core 1, and has overlapped interlayer 3 between conducting strip 2 and electric core 1, and wherein, interlayer 3 is insulating material and makes, especially interlayer 3 can have elastic material to make. Therefore, the conducting strip 2, the interlayer 3 and the battery cell 1 are sequentially superposed and matched. As shown in fig. 1, both the conductive sheet 2 and the interlayer 3 are configured in a sheet shape, and the interlayer 3 is attached to the side surface of the battery cell 1, i.e. the maximum surface, and meanwhile, the conductive sheet 2 is attached to the side surface of the interlayer 3 departing from the battery cell 1, so as to realize the installation connection of the three, wherein the interlayer 3 and the battery cell 1 and the interlayer 3 and the conductive sheet 2 can be fixed in an adhesive manner or can be connected and fixed in other manners.

As shown in fig. 1 and 2, the conductive sheet 2 is provided with a lead-out portion 22, the lead-out portion 22 is led out from the edge of the conductive sheet 2, and the lead-out portion 22 is used for electrical connection with the electrode column. As shown in fig. 5, the leading-out portion 22 is connected to the conductive plate 2 in a bent manner, for example, the leading-out portion 22 is connected to the upper edge of the conductive plate 2 and is vertically connected to the conductive plate 2, so that the conductive plate 2 is located on the side surface of the battery cell 1, and the leading-out portion 22 can extend to the upper end surface of the battery cell 1 to be connected to the electrode column, thereby achieving the electrical connection between the battery cell 1 and the conductive plate 2.

The interlayer 3 may be an insulating film; or also can adopt the thin slice that independently has insulating characteristic, so that interlayer 3 not only has insulating function, still have heat conduction or thermal-insulated function concurrently simultaneously, it needs to explain, set up conducting strip 2 in electric core 1's side and be connected with electric core 1's electrode post electricity, make the heat accessible interlayer 3 that conducting strip 2 produced transmit to electric core 1, thereby do benefit to electric core 1 and heat up, and simultaneously, the large face temperature of electric core 1 can be balanced to conducting strip 2, and when thermal runaway appeared in electric core 1, the temperature of electric core 1 also can be derived through conducting strip 2, interlayer 3 has thermal-insulated function and can prevent thermal runaway diffusion from appearing between the adjacent electric core 1, do benefit to the security that improves electric core subassembly 10.

Therefore, the conventional bus bar design is omitted for the electric core assembly 10, the electric core assembly is electrically connected with the electric core 1 through the conducting strip 2 and is arranged on the side surface of the electric core 1, the structure is simple, the installation is convenient, the electric core assembly 10 can be disassembled and used after being used for a certain time, the problem that the whole battery module 100 is scrapped due to welding single-point welding errors cannot occur, and the design cost is better in safety and lower.

In some embodiments, the electrode posts include positive posts 11 and negative posts 12, that is, the positive posts 11 and the negative posts 12 are used to connect the battery cells 1 in series in the circuit of the battery module 100, and when actually connected, the adjacent two battery cells 1 of the plurality of battery cells 1 of the battery module 100 are electrically connected, for example, in three battery cells 1, the positive post 11 of the middle battery cell 1 is electrically connected to the negative post 12 of the adjacent battery cell 1, and the negative post 12 of the middle battery cell 1 is electrically connected to the positive post 11 of the adjacent other battery cell 1.

Wherein, as shown in fig. 1 and fig. 2, two conducting strips 2 are provided, two conducting strips 2 are respectively located at two sides of the battery cell 1, of the two conducting strips 2, the leading-out part 22 of one conducting strip 2 is used for electrically connecting with the positive pole 11, the leading-out part 22 of the other conducting strip 2 is used for electrically connecting with the negative pole 12, thereby, the two conducting strips 2 can be respectively electrically connected with the positive pole 11 and the negative pole 12 of the battery cell 1,

it should be noted that, in the battery module 100, the plurality of battery cell assemblies 10 are sequentially connected, and the conductive sheets 2 corresponding to two adjacent battery cells 1 are attached and contacted to realize the electrical connection between two adjacent battery cells 1.

In some embodiments, the positive electrode post 11 and the negative electrode post 12 are located on the same surface of the battery cell 1, that is, the positive electrode post 11 and the negative electrode post 12 may be jointly disposed on the upper end surface of the battery cell 1, so that, as shown in fig. 1 and fig. 2, the positive electrode post 11 and the negative electrode post 12 are both disposed on the upper end surface of the battery cell 1, and the leading portions 22 of the two conducting plates 2 are both led out from the upper side edge of the corresponding conducting plate 2, so that the two leading portions 22 extend to the upper end surface of the battery cell 1 to be electrically connected to the corresponding electrode posts; or the two lead-out portions are arranged on the lower end face of the battery cell 1, and the lead-out portions 22 of the two conducting strips 2 are led out from the lower side edge of the corresponding conducting strip 2, so that the two lead-out portions 22 extend to the upper end face of the battery cell 1 to be electrically connected with the corresponding electrode column. Of course, positive electrode tab 11 and negative electrode tab 12 may be provided on other surfaces, and are not limited to the upper end surface and the lower end surface.

Alternatively, the positive post 11 and the negative post 12 are located on different surfaces of the battery cell 1, for example, the positive post 11 is located on the upper surface of the battery cell 1, and the negative post 12 is located on the lower surface of the battery cell 1, or the positive post 11 is located on the lower surface of the battery cell 1, and the negative post 12 is located on the upper surface of the battery cell 1. In this way, the lead portions 22 of the two conductive plates 2 are respectively led out from the upper and lower side edges of the corresponding conductive plate 2 to be electrically connected to the corresponding electrode posts.

In some embodiments, the positive post 11 and the negative post 12 are located on the same surface of the battery cell 1 and sequentially distributed along the length direction of the surface, as shown in fig. 1 and fig. 2, the positive post 11 and the negative post 12 are both located on the upper surface of the battery cell 1, and the positive post 11 and the negative post 12 are spaced apart along the length direction of the upper surface of the battery cell 1, so that the distribution of the positive post 11 and the negative post 12 is more suitable for the layout of the battery cell 1, and the problem that the design of the electrode posts is too compact and the connection with the lead-out portion 22 is too crowded is avoided. In this way, the lead-out portions 22 of the two conductive sheets 2 are distributed in a staggered manner in the width direction of the surface, that is, the lead-out portions 22 of the two conductive sheets 2 are sequentially distributed in the length direction of the upper surface of the battery cell 1, thereby facilitating the electrical connection between the two lead-out portions 22 and the positive and negative posts 11 and 12, respectively.

As shown in fig. 6, after the plurality of cell assemblies 10 are sequentially mounted, the lead-out portions 22 of the two conductive sheets 2 corresponding to the plurality of cell assemblies 10 are respectively located at two side edges of the upper surface of the battery module 100, so that the arrangement of the battery module 100 is more regular.

In some embodiments, the leading portion 22 and the conductive sheet 2 are integrally formed, so that the overall structural strength of the leading portion 22 and the conductive sheet 2 is relatively high, the problem of connection fracture at the joint of the leading portion 22 and the conductive sheet 2 is not easy to occur, and the conductive stability of the electric core assembly 10 is ensured. Or, in another embodiment, as shown in fig. 1, the leading-out portion 22 and the conductive plate 2 are formed separately, so as to be beneficial to reducing the forming difficulty of a single piece, and in the specific design, as shown in fig. 5, a connection flange 21 is formed at the upper side edge of the conductive plate 2, the connection flange 21 and the leading-out portion 22 are arranged in parallel, and the leading-out portion 22 can be lapped on the connection flange 21 and welded and fixed with the connection flange 21, so that the structure is simple, and the installation is convenient.

In some embodiments, the side of the battery cell 1 includes a central region 13 and a peripheral region 14, the peripheral region 14 is disposed around the central region 13, the peripheral region 14 protrudes from the central region 13 to form an installation space at the side of the battery cell 1, that is, the central region 13 of the battery cell 1 is configured as a recessed portion to form an installation space, and the interlayer 3 and at least part of the conductive sheet 2 are both located in the installation space.

Like this, can guarantee interlayer 3 and conducting strip 2 stable connection, the difficult problem that deviates from in installation space of interlayer 3 and conducting strip 2 that appears does benefit to simultaneously and plays the effect of location to interlayer 3 and conducting strip 2, guarantees that the position that interlayer 3 and conducting strip 2 were located is stable, improves 10 overall stability of electric core subassembly. Wherein, set up interlayer 3 and conducting strip 2's at least part in installation space, can make electric core subassembly 10's whole thickness reduce effectively to after installing a plurality of electric core subassemblies 10 in proper order, battery module 100's overall structure size is less, does benefit to the design that realizes the miniaturization.

In some embodiments, the peripheral region 14 is provided with an avoiding gap, an inner wall surface of the avoiding gap is flush with an inner wall surface of the middle region 13, and the leading-out portion 22 is led out of the installation space from the avoiding gap, that is, after the conducting strip 2 is installed at the installation space, the leading-out portion 22 can be led out from the avoiding gap to realize electrical connection with the electrode column, and the problem of overlarge structural thickness or protrusion at the leading-out portion 22 is avoided.

In some embodiments, the interlayer 3 is configured such that the thickness of the middle portion is smaller than that of the outer peripheral portion, i.e. the interlayer 3 is designed with uneven thickness, and the thickness of the outer peripheral portion is smaller than that of the conductive sheet 2 connected to the positive post 11 and the conductive sheet 2 connected to the negative post 12, so as to provide insulation protection while avoiding affecting the normal contact between the lead-out portion 22 and the electrode post.

And/or, the interlayer 3 is constructed in a way that the density of the middle part is smaller than that of the outer peripheral part, namely, the interlayer 3 is constructed in a design of uneven density, and the density from the middle part to the outer peripheral part is gradually increased, so that the outer peripheral density is higher during initial assembly, larger supporting force can be provided, and the stable contact of the periphery of the interlayer 3 is ensured. And, along with electric core 1 uses to generate heat and middle bulging phenomenon that produces, from this, adopt that middle part density is little and peripheral part density is big for the compressible deflection of middle part is big in order to absorb electric core 1 bulging deformation, and the peripheral high density, the elasticity high pass through the clearance that electric core 1 bulging periphery produced in the middle of the high elasticity compensation, guarantee peripheral conducting strip 2 effective contact. Therefore, the design of the interlayer 3 is thinner compared with the density and thickness of materials, and the space occupation is reduced.

The interlayer 3 in the utility model can be made of elastic material, so that the interlayer 3 is in close contact with the battery core 1 and the conducting plate 2 respectively, and the insulation can be realized by pasting an insulating film or coating insulating material on one side of the conducting plate 2 facing the battery core 1, or can be realized by pasting an insulating film or coating insulating material on the surface of the battery core 1.

Or the interlayer 3 can adopt a composite form of various materials, such as a form of adding aerogel felt in the middle of a PP frame, coating a film on the surface, forming an adhesive layer on the surface and the like.

The utility model also provides a battery module 100.

According to the battery module 100 provided by the embodiment of the utility model, the battery core assembly 10 provided by any one of the embodiments is electrically connected with the battery core 1 through the conducting strip 2 and is arranged on the side surface of the battery core 1, the structure is simple, the installation is convenient, the battery core assembly 10 can be disassembled and used after being used for a certain time, the problem that the whole battery module 100 is scrapped due to welding single-point welding errors is avoided, the safety is better, and the design cost is lower.

In some embodiments, the battery module 100 includes a plurality of battery assemblies 10, the plurality of battery assemblies 10 are stacked along the thickness direction of the battery core 1, and the conductive sheets 2 of two adjacent battery assemblies 10 are attached to each other, in the battery module 100, the plurality of battery assemblies 10 are sequentially connected to each other, and the conductive sheets 2 corresponding to two adjacent battery cores 1 are attached to each other and contact each other, so as to realize the electrical connection between two adjacent battery cores 1. The positive pole column 11 and the negative pole column 12 are located on the same surface of the battery cell 1, that is, the positive pole column 11 and the negative pole column 12 can be jointly disposed on the upper end face of the battery cell 1, so that, as shown in fig. 1 and fig. 2, the positive pole column 11 and the negative pole column 12 are both disposed on the upper end face of the battery cell 1, and the lead-out portions 22 of the two conducting strips 2 are both led out from the upper side edges of the corresponding conducting strips 2, so that the two lead-out portions 22 extend to the upper end face of the battery cell 1 to be electrically connected with the corresponding electrode columns; or the two lead-out portions are arranged on the lower end face of the battery cell 1, and the lead-out portions 22 of the two conducting strips 2 are led out from the lower side edge of the corresponding conducting strip 2, so that the two lead-out portions 22 extend to the upper end face of the battery cell 1 to be electrically connected with the corresponding electrode column. Of course, positive electrode tab 11 and negative electrode tab 12 may be provided on other surfaces, and are not limited to the upper end surface and the lower end surface.

Therefore, the plurality of cell assemblies 10 can be fixedly connected, the structure of the battery module 100 is simplified, and the space utilization rate of the battery module 100 is improved.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the utility model, "on" or "under" a first feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but are in contact via another feature between them.

In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An electric core assembly (10), characterized in that it comprises:

the battery cell comprises a battery cell (1), wherein the battery cell (1) is provided with an electrode column;

the battery cell comprises a conductive sheet (2), wherein the conductive sheet (2) is positioned on the side surface of the battery cell (1), and an interlayer (3) is arranged between the conductive sheet (2) and the battery cell (1); wherein,

the conducting strip (2) is provided with a leading-out part (22), and the leading-out part (22) is led out from the edge of the conducting strip (2) and is used for being electrically connected with the electrode column.

2. The battery cell assembly (10) according to claim 1, wherein the electrode posts comprise a positive post (11) and a negative post (12), the conducting strips (2) are arranged in two, and the two conducting strips (2) are respectively positioned at two sides of the battery cell (1); wherein,

in the two conducting strips (2), the leading-out part (22) of one conducting strip (2) is electrically connected with the positive pole column (11), and the leading-out part (22) of the other conducting strip (2) is electrically connected with the negative pole column (12).

3. The electric core assembly (10) according to claim 2,

the positive pole column (11) and the negative pole column (12) are positioned on the same surface of the battery cell (1);

or the positive pole column (11) and the negative pole column (12) are positioned on different surfaces of the battery cell (1).

4. The battery core assembly (10) according to claim 2, wherein the positive electrode posts (11) and the negative electrode posts (12) are located on the same surface of the battery core (1) and are distributed in sequence along the length direction of the surface, and the leading-out parts (22) of the two conducting strips (2) are distributed in a staggered manner in the width direction of the surface.

5. The electric core assembly (10) according to claim 1,

the leading-out part (22) and the conducting strip (2) are integrally formed;

or the leading-out part (22) is connected with the conducting strip (2) in a welding mode.

6. The electric core assembly (10) according to any of claims 1 to 5, characterized in that the side faces of the electric core (1) comprise a central region (13) and an outer peripheral region (14) surrounding the central region (13), the outer peripheral region (14) protrudes from the central region (13) to form an installation space at the side faces of the electric core (1), and the insulation layer (3) and at least part of the conductive sheet (2) are located in the installation space.

7. The electric core assembly (10) according to claim 6, characterized in that the outer peripheral region (14) is provided with an avoidance gap, the inner wall surface of the avoidance gap is flush with the inner wall surface of the middle region (13), and the lead-out part (22) is led out of the installation space from the avoidance gap.

8. The electric core assembly (10) according to any of claims 1-5, characterized in that said barrier (3) is configured such that the thickness of the middle part is smaller than the thickness of the outer part and/or said barrier (3) is configured such that the density of the middle part is smaller than the density of the outer part.

9. A battery module (100), characterized in that a battery core assembly (10) according to any one of claims 1 to 8 is provided.

10. The battery module (100) according to claim 9, comprising a plurality of the cell assemblies (10); wherein,

the battery cell assembly comprises a plurality of battery cell assemblies (10), wherein the battery cell assemblies (10) are overlapped in the thickness direction of a battery cell (1), and are adjacent to each other, and conducting strips (2) of the battery cell assemblies (10) are attached to each other.

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