CN217426947U - Battery module and power battery - Google Patents

Abstract

The application relates to battery technology field, especially relates to a battery module and power battery, and the battery module includes: the battery comprises at least two single battery cells with the same shape, wherein the at least two single battery cells are sequentially stacked; each single battery cell is provided with a preset surface, and the preset surface is provided with an output electrode; any two adjacent monomer battery cores in the at least two battery cores are arranged in a staggered mode, so that the preset surfaces of the two adjacent battery cores are at least arranged in a staggered mode in the region of the output electrodes. The application provides a battery module, through the rational arrangement of monomer electricity core, can reduce a plurality of monomer electricity cores and be connected, the difficult degree that switches on between electric core and the electricity core after in groups, be particularly useful for the condition that the output pole set up on electric core big face.

Description

Battery module and power battery

Technical Field

The application relates to the technical field of batteries, in particular to a battery module and a power battery.

Background

At present, a plurality of square battery cells are provided with output electrodes at specific positions, certain difficulty may be caused to connection of a follow-up busbar, especially, the output electrodes are arranged on the large surface of the battery cells, and due to stacking of the battery cells, difficulty in the connection process of the busbar and the output electrodes of the two battery cells is high, and the overall processing efficiency of the battery is influenced.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a battery module and power battery to solve the electric core that exists to a certain extent and pile up back busbar and the technical problem of utmost point post connection difficulty among the prior art.

The application provides a battery module, includes: the battery comprises at least two single battery cells with the same shape, wherein the at least two single battery cells are sequentially stacked;

each single battery cell is provided with a predetermined surface, and the predetermined surface is provided with an output electrode;

and any two adjacent monomer battery cells in the at least two battery cells are arranged in a staggered manner, so that the preset surfaces of the two adjacent battery cells are at least arranged in the region of the output electrode in a staggered manner.

In the above technical solution, further, each of the individual electric cores has a rectangular parallelepiped structure, and at least one of two walls with the largest area among six walls of the rectangular parallelepiped structure is used as the predetermined surface; or two walls with the smallest area in the six walls of the cuboid structure are taken as the predetermined surfaces.

In any of the above technical solutions, further, one end of each of the individual electric cores is a first positioning end, and the other end of each of the individual electric cores is a second positioning end;

along the stacking direction of at least two of the monomer electric cores, the first positioning ends of odd-numbered monomer electric cores in the at least two monomer electric cores are aligned in sequence, and the first positioning ends of even-numbered monomer electric cores are aligned.

In any of the above technical solutions, further, along the stacking direction of at least two of the individual electric cores, the at least two of the individual electric cores are sequentially arranged in a staggered manner along the same direction at the same staggered distance.

In any of the above technical solutions, further, the battery module further includes a bus connection piece, and the output electrodes of two adjacent single electric cores are connected by the bus connection piece.

In any one of the foregoing technical solutions, further, the junction connector includes a first connection portion, a second connection portion, and a third connection portion, which are connected in sequence, where the first connection portion is connected to an output electrode of one of the two adjacent monomer electric cores, and the third connection portion is connected to an output electrode of another one of the two adjacent monomer electric cores;

the first connecting portion and the third connecting portion are arranged at an angle to the second connecting portion respectively.

In any one of the above technical solutions, further, the output electrode has a rectangular parallelepiped structure, the output electrode extends along the width direction of the cell, and the offset distance between any two adjacent cell cores is 0.5 to 5 times the width of the output electrode; or the dislocation distance between any two adjacent single battery cores is 0.5-30 times of the thickness of the confluence connecting piece.

In any one of the foregoing technical solutions, further, when the predetermined surface is a wall surface with a largest area of the single battery cell, a first defect portion and a second defect portion are formed on the predetermined surface, and the output electrode is disposed in the first defect portion and the second defect portion.

In any one of the above technical solutions, further, the battery module further includes a sampling unit, and the sampling unit is connected to the bus bar connecting member.

The application also provides a power battery, which comprises the battery module in any technical scheme, so that all beneficial technical effects of the battery module are achieved, and the details are not repeated.

Compared with the prior art, the beneficial effect of this application is:

the battery module that this application provided includes: the battery comprises at least two single battery cells with the same shape, wherein the at least two single battery cells are sequentially stacked; each single battery cell is provided with a preset surface, and the preset surface is provided with an output electrode; any two adjacent monomer battery cores in the at least two battery cores are arranged in a staggered mode, so that the preset surfaces of the two adjacent battery cores are at least arranged in a staggered mode in the region of the output electrodes.

The application provides a battery module, through the rational arrangement of monomer electricity core, can reduce a plurality of monomer electricity cores and be connected, the difficult degree that switches on between electric core and the electricity core after in groups, be particularly useful for the condition that the output pole set up on electric core big face.

The application provides a power battery, including the aforesaid battery module, therefore, can reduce a plurality of monomer electric cores and pile the back busbar in order and be connected with the output pole of monomer electric core through this battery module and be connected the degree of difficulty, and then help improving the joint strength between busbar and the output pole.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;

fig. 2 is a schematic view of another structure of a battery module according to an embodiment of the present disclosure;

fig. 3 is another schematic structural diagram of a battery module according to an embodiment of the present disclosure;

fig. 4 is another perspective view of a battery module according to an embodiment of the present disclosure;

fig. 5 is a schematic view of a partial structure of a battery module according to an embodiment of the present disclosure.

Reference numerals are as follows:

the device comprises a single battery cell 1, a first positioning end 101, a second positioning end 102, an output electrode 2, a first defect part 3, a second defect part 4, a confluence connecting piece 5 and a sampling unit 6.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of 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 thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The following describes a battery module and a power battery according to an embodiment of the present application with reference to fig. 1 to 5.

Referring to fig. 1 to 5, an embodiment of the present application provides a battery module, where the battery module includes at least two sequentially stacked single battery cells 1, preferably, the number of the single battery cells 1 is multiple (more than two), the shapes of the multiple single battery cells 1 are the same, and any two adjacent single battery cells 1 are arranged in a staggered manner, and output electrodes 2 of any two adjacent single battery cells 1 are connected and conducted, so that the single battery cells 1 can be disposed in a box of a battery pack one by one, and also the multiple single battery cells 1 can be disposed in the box of the battery pack in a module-integrated manner after being sequentially stacked.

Specifically, each of the cell cores 1 has a rectangular parallelepiped structure including six wall surfaces, and one or two of the six wall surfaces serve as a predetermined surface for providing the output electrode 2. For convenience of description, any adjacent three monomer battery cells 1 in the plurality of monomer battery cells 1 are respectively defined as a first battery cell, a second battery cell and a third battery cell, an output positive electrode (or an output negative electrode) of the first battery cell is connected with an output negative electrode (or an output positive electrode) of the second battery cell so that the first battery cell and the second battery cell are connected and conducted, an output positive electrode (or an output negative electrode) of the second battery cell is connected with an output negative electrode (or an output positive electrode) of the third battery cell, and the plurality of monomer battery cells 1 are sequentially stacked according to the rule.

It should be noted that the large surfaces of any two adjacent monomer battery cells 1 are attached to each other, so that the plurality of monomer battery cells 1 are sequentially stacked along the normal direction of the large surfaces of the monomer battery cells 1.

Further, the two ends of each monomer battery cell 1 distributed along the length direction thereof are respectively a first positioning end 101 and a second positioning end 102, a first step structure is formed between the first positioning ends 101 of any two adjacent monomer battery cells 1, and a second step structure is formed between the second positioning ends 102 of any two adjacent monomer battery cells 1, so that the plurality of monomer battery cells 1 are realized, and the two adjacent monomer battery cells 1 can be arranged along the length direction of the monomer battery cells 1 in a staggered manner. Specifically, the dislocation of a plurality of monomer electricity cores 1 arranges and has more than one kind of dislocation form, as shown in fig. 1 and fig. 4, a plurality of monomer electricity cores 1 control in proper order dislocation set about its length direction, specifically, along a plurality of monomer electricity cores 1's the orientation that piles up, odd number monomer electricity core 1's first locating end 101 aligns one by one, second locating end 102 is also to it one by one, even number monomer electricity core 1's first locating end 101 aligns one by one, second locating end 102 aligns one by one, and form first stair structure between the first locating end 101 of two arbitrary adjacent monomer electricity cores 1, form second stair structure between the second locating end 102.

As shown in fig. 2, along the stacking direction of the plurality of monomer battery cells 1, the plurality of monomer battery cells 1 are sequentially staggered one by one along the same direction (left or right) in the length direction of the monomer battery cells 1, so that the left end of the battery module stacked from the plurality of monomer battery cells 1 in the state shown in fig. 2 sequentially forms a first stepped structure and the right end sequentially forms a second stepped structure.

Further, the predetermined face of monomer electricity core 1 is one or both in the great wall of two areas of monomer electricity core 1's cuboid structure, that is to say, one or two in two big faces of monomer electricity core 1 are as predetermined face, specifically speaking, positive output pole 2 and negative output pole 2 of each monomer electricity core 1 can set up on same big face, also can set up respectively on two big faces, and pile up through a plurality of monomer electricity cores 1 dislocation one by one, make output pole 2 of each monomer electricity core 1 can be in the exposed state, thereby be convenient for output pole 2 to connect.

Furthermore, when one of the large surfaces of the single battery cell 1 is taken as a predetermined surface, the output positive electrode and the output negative electrode are both disposed on the predetermined surface, positions of the predetermined surface close to one pair of opposite corners are respectively recessed to form the first defect portion 3 and the second defect portion 4, the output positive electrode (or the output negative electrode) is disposed in the first defect portion 3, and the output negative electrode (or the output positive electrode) is disposed in the second defect portion 4, so that the output positive electrode and the output negative electrode are prevented from protruding relative to the predetermined surface, and are convenient to be subsequently connected with components such as a bus bar.

When two large surfaces of the single battery cell 1 are both used as predetermined surfaces, one of the large surfaces is formed with a first defect portion 3, the other large surface is formed with a second defect portion 4, the first defect portion 3 and the second defect portion 4 are respectively arranged at positions close to the vertex angles of the two large surfaces, the output positive electrode (or the output negative electrode) is arranged in the first defect portion 3, and the output negative electrode (or the output positive electrode) is arranged in the second defect portion 4.

In addition, as shown in fig. 3, the predetermined surface can also be two terminal surfaces with the smallest area of the cuboid structure of the single battery cell 1, and the two terminal surfaces are respectively provided with an output anode and an output cathode, so that the distance between the output electrodes 2 on the two adjacent single battery cells 1 is pulled open, the distance between the two adjacent bus connecting pieces 5 is also pulled open, that is, the insulation distance is increased, and the safety of the battery module is improved.

Preferably, the bus connecting piece 5 is a copper bar, the width of the staggered position of the output electrode 2 arranged between the two adjacent monomer battery cores 1 on the end surface is 0.5-30 times of the thickness of the copper bar, more preferably, the thickness of the copper bar is 0.5-3mm, the stability of the connection between the copper bar and the output electrode 2 is ensured, and the copper bar is prevented from occupying too much space.

Further, the output electrodes 2 (output positive electrode and output negative electrode) of the cell electric cores 1 have a rectangular structure, and the widths of the first step structure and the second step structure, that is, the widths of the staggered positions of two adjacent cell electric cores 1 are preferably 0.5-5 times the width of the output electrode 2, so that a sufficient space for connecting the following bus bar connecting piece 5 is formed between the output electrodes 2 of any two adjacent cell electric cores 1, and it is important to avoid the following cell electric core 1 from shielding the output electrode 2 of the previous cell electric core 1.

Further, the battery module that this application provided still includes the connecting piece 5 that converges, and two adjacent monomer electricity cores 1 connect and switch on through the connecting piece 5 that converges.

The bus bar connector 5 includes a first connection portion, a second connection portion, and a third connection portion connected in sequence, preferably, the first connection portion, the second connection portion, and the third connection portion each have a sheet structure, and more preferably, the first connection portion, the second connection portion, and the third connection portion have an integrated structure. The first connecting portion is connected with an output positive electrode (or an output negative electrode) of one of the two adjacent monomer battery cells 1, the connecting manner may be welding or connection using fasteners such as screws, and the third connecting portion is connected with an output negative electrode (or an output positive electrode) of another one of the two adjacent monomer battery cells 1, so as to connect and conduct the two adjacent monomer battery cells 1.

The first connecting portion and the third connecting portion are connected by the second connecting portion, the connecting manner may be welding or connection using a fastener such as a screw, and preferably, the first connecting portion, the second connecting portion and the third connecting portion are made of a conductive metal and have an integrated structure. More preferably, first connecting portion and second connecting portion angle setting, third connecting portion and second connecting portion angle setting for the connecting piece 5 that converges can follow the shape with first step portion, second step portion and set up, avoids converging connecting piece 5 and occupies too much space in the box of battery package.

Further, the battery module provided by the embodiment of the present application further includes a sampling unit 6,

a sampling unit 6 is associated with each bus connector 5 for signal acquisition.

To sum up, the battery module that this application provided, through the reasonable layout of monomer electricity core, with a plurality of monomer electricity cores dislocation set one by one, make the output pole can expose so that follow-up connection, thereby reduce a plurality of monomer electricity cores and be connected between battery core and the electricity core after in groups, the difficult degree that switches on, be particularly useful for the output pole and set up the condition on electric core big face, help improving the insulating distance between the output pole of two adjacent monomer electricity cores moreover, help improving this battery module and contain this battery module's power battery's security.

The embodiment of the present application further provides a power battery, which includes the battery module described in any of the above embodiments, and therefore, all the beneficial technical effects of the battery module are achieved, and details are not repeated herein.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A battery module, comprising: the battery comprises at least two single battery cells with the same shape, wherein the at least two single battery cells are sequentially stacked;

each single battery cell is provided with a preset surface, and the preset surface is provided with an output electrode;

and any two adjacent monomer battery cells in the at least two battery cells are arranged in a staggered manner, so that the preset surfaces of the two adjacent battery cells are at least arranged in the region of the output electrode in a staggered manner.

2. The battery module according to claim 1, wherein each of the unit cells has a rectangular parallelepiped structure, at least one of two walls having the largest area among six walls of the rectangular parallelepiped structure being the predetermined face; or two walls with the smallest area in the six walls of the cuboid structure are taken as the predetermined surfaces.

3. The battery module of claim 1, wherein one end of each of the unit cells is a first positioning end, and the other end of each of the unit cells is a second positioning end;

along the stacking direction of at least two of the monomer electric cores, the first positioning ends of odd-numbered monomer electric cores in the at least two monomer electric cores are aligned in sequence, and the first positioning ends of even-numbered monomer electric cores are aligned.

4. The battery module of claim 1, wherein at least two of the cell units are sequentially staggered in the same direction by the same staggered distance along the stacking direction of the at least two cell units.

5. The battery module according to any one of claims 1 to 4, further comprising a bus bar connection member by which output poles of adjacent two of the unit cells are connected.

6. The battery module of claim 5, wherein the junction connector comprises a first connection portion, a second connection portion, and a third connection portion connected in sequence, the first connection portion being connected to an output pole of one of two adjacent cell units, and the third connection portion being connected to an output pole of another of the two adjacent cell units;

the first connecting portion and the third connecting portion are respectively arranged at an angle to the second connecting portion.

7. The battery module of claim 5, wherein the output electrode has a rectangular parallelepiped structure, the output electrode extends along the width direction of the single cells, and the offset distance between any two adjacent single cells is 0.5-5 times the width of the output electrode; or the dislocation distance between any two adjacent monomer battery cores is 0.5-30 times of the thickness of the confluence connecting piece.

8. The battery module according to claim 2, wherein the predetermined surface is a wall surface having a largest area of the unit cells, the predetermined surface is formed with a first defect portion and a second defect portion, and the output electrode is disposed in the first defect portion and the second defect portion.

9. The battery module of claim 5, further comprising a sampling unit connected to the bus bar connection.

10. A power cell comprising the battery module of any one of claims 1 to 9.

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