CN215644728U - Battery module and battery pack with same - Google Patents

Abstract

The utility model discloses a battery module and a battery pack with the same, wherein the battery module comprises: the base comprises a bottom plate and a side frame, wherein the bottom plate and the side frame define an accommodating space and an external mounting space outside the accommodating space; the battery cell is arranged in the accommodating space; a BMS module mounted in the external mounting space and electrically connected to the battery cell; the busbar is installed at the bottom of the accommodating space, and the pole of the battery cell abuts against the busbar. According to the battery module, the bus bar is arranged at the bottom of the accommodating space, and the pole of the battery cell is abutted against the bus bar, so that the bus bar is fixed by using the self weight of the battery cell, the structural arrangement in the battery module is compact, the space utilization rate in the battery module is improved, and the energy density of a battery pack is favorably improved.

Description

Battery module and battery pack with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack with the same.

Background

Among the correlation technique, the design of battery module all is up at electric core utmost point post, the top of electric core is located to BMS (battery management system) in the battery package, and realize its being connected with the battery module through the pencil, BMS need fix alone, and the space that occupies is great, the busbar needs the design to bend or other forms's buffer structure to solve the tensile effect that electric core inflation brought to it simultaneously, and busbar and electric core need weld or wait other forms's connection, the structure size that leads to the battery module among the prior art is great, and space utilization in the battery module is lower, the energy density of battery package has been influenced, there is 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 module, which can fix a busbar by using the self-weight of a battery cell, so that the structural arrangement in the battery module is compact, the space utilization rate in the battery module is improved, and the improvement of the energy density of a battery pack is facilitated.

The battery module according to an embodiment of the present invention includes: the base comprises a bottom plate and a side frame, wherein the bottom plate and the side frame define an accommodating space and an external mounting space outside the accommodating space; the battery cell is arranged in the accommodating space; a BMS module mounted in the external mounting space and electrically connected to the battery cell; the busbar is installed at the bottom of the accommodating space, and the pole of the battery cell abuts against the busbar.

According to the battery module, the bus bar is arranged at the bottom of the accommodating space, and the pole of the battery cell is abutted against the bus bar, so that the bus bar is fixed by using the self weight of the battery cell, the structural arrangement in the battery module is compact, the space utilization rate in the battery module is improved, and the energy density of a battery pack is favorably improved.

According to the battery module of some embodiments of the present invention, the bus bar is plural, and the plural bus bars are distributed on the bottom plate at intervals; the battery cell is a plurality of groups, and the pole columns of the battery cells respectively abut against the upper surfaces of the busbars.

According to the battery module of some embodiments of the present invention, the plurality of bus bars are electrically connected, and two bus bars of the plurality of bus bars are provided with output electrodes, which penetrate through the side frame and extend to the external mounting space to be electrically connected with an electrical component.

According to the battery module of some embodiments of the present invention, each battery cell includes a plurality of sub-battery cells, and the terminals of the plurality of sub-battery cells respectively abut against the bus bar at a plurality of positions in the length direction of the bus bar.

The battery module according to some embodiments of the present invention further includes: the sampling piece, the sampling piece install in accommodation space and be located the bottom of electricity core, the sampling piece with the busbar is spaced apart just the sampling piece is located same two of electricity core (2) between the utmost point post, at least part of sampling piece extends outside installation space with the BMS module electricity is connected.

According to the battery module of some embodiments of the present invention, the sampling member and the bus bar are both plural, and the plural bus bars and the plural sampling members are spaced apart from each other on the upper surface of the base plate.

According to the battery module of some embodiments of the present invention, the plurality of sampling members and the plurality of bus bars are alternately arranged in the width direction of the bottom plate.

According to the battery module of some embodiments of the present invention, the battery cells are in multiple groups, each group of the battery cells includes at least two sub-battery cells, a mounting gap is defined between two poles of each sub-battery cell (21), and the sampling members (5) sequentially penetrate through the mounting gaps of at least two sub-battery cells (21).

The battery module according to some embodiments of the present invention further includes: the transverse beam and the longitudinal beam are arranged in the accommodating space and divide the accommodating space into a plurality of subspaces; the transverse beam and/or the longitudinal beam and the bottom plate define a bus bar avoiding groove, and the bus bar penetrates through the bus bar avoiding groove to electrically connect the battery cells in the subspaces.

The utility model also provides a battery pack.

According to the battery pack of the embodiment of the utility model, the battery module of any one of the above embodiments is provided.

The advantages of the battery pack and the battery module are the same as those of the battery module in 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 a schematic structural view of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a base of a battery module according to an embodiment of the present invention.

Reference numerals:

the battery module 100 is provided with a battery case,

base 1, bottom plate 11, side frame 12, electric core 2, sub-electric core 21, BMS module 3, busbar 4, output pole 41, sampling piece 5, crossbeam 6, longeron 7, accommodation space 8, subspace 81, external installation space 9, electric component 10.

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 to 3, a battery module 100 according to an embodiment of the present invention is described, in which a busbar 4 is mounted on a lower side of a battery cell 2, and a terminal of the battery cell 2 abuts against the busbar 4, so that the busbar 4 does not need to be welded to the battery cell 2, the battery cell 2 can be connected to the busbar 4 by self weight, the mounting process is simplified, the structural arrangement of the battery module 100 is compact, and meanwhile, a BMS module 3 is mounted in an external mounting space 9 and electrically connected to the battery cell 2, so that the space utilization rate in the battery module 100 is further improved.

The battery module 100 according to an embodiment of the present invention includes: base 1, electric core 2, BMS module 3 and busbar 4.

As shown in fig. 3, the base 1 includes a bottom plate 11 and a side frame 12, the bottom plate 11 and the side frame 12 define an accommodating space 8 and an external installation space 9 outside the accommodating space 8, and the battery cell 2 is installed in the accommodating space 8.

Preferably, the side frame 12 is installed on one side of the bottom plate 11, and the side frame 12 is connected to the bottom plate 11, so that the side frame 12 and the bottom plate 11 jointly define the open accommodating space 8, for example, the side frame 12 is installed on the upper side of the bottom plate 11 to define the accommodating space 8 which is open upwards, and the accommodating space 8 is used for installing the battery cell 2 and the sampling member 5 and the bus bar 4 connected to the battery cell 2. Can play the effect of protection to electric core 2, sampling piece 5 and busbar 4 isotructure in accommodation space 8 through side frame 12 and bottom plate 11, strengthen battery module 100's structural stability.

It should be noted that the battery cell 2 in the present invention is a zero-expansion battery cell 2 during charging and discharging, and when the battery cell is specifically installed, the terminal of the battery cell 2 is installed in the accommodating space 8 toward the direction of the bottom plate 11, and the sampling piece 5 and the bus bar 4 are both disposed between the battery cell 2 and the bottom plate 11, so that the space utilization rate in the battery module 100 can be improved, and the structure of the battery module 100 is optimized.

The base plate 11 protrudes from the side frame 12 at the outside of the receiving space 8 to define an external mounting area with the outer side of the side frame 12, the external mounting area being used to mount the BMS module 3 electrically connected to the sampling member 5 and the electrical members 10 connected to the bus bar 4. It is understood that any end of the bottom plate 11 may extend toward a direction away from the receiving space 8 and protrude from the side frames 12, so that the portion of the bottom plate 11 protruding from the side frames 12 and the side surfaces of the side frames 12 facing away from the receiving space 8 jointly define an open external mounting area, and thus the BMS module 3 and the electrical component 10 may be mounted in the external mounting area.

Preferably, as shown in fig. 1, the BMS module 3 may be mounted to the external mounting space 9, i.e., the BMS module 3 is mounted to a side of the side frame 12 facing away from the receiving space 8. From this, BMS module 3 need not set up in the upside of electricity core 2, install BMS module 3 in external installation space 9 simultaneously and can shorten the distance of being connected between BMS module 3 and electricity core 2, make BMS module 3 can directly be connected with electricity core 2 electricity, thereby need not set up connector and connecting harness between electricity core 2 and BMS module 3, and the part that protrudes through bottom plate 11 in side frame 12 deviates from the fixed point of electricity BMS module 3 with the side that side frame 12 deviates from accommodation space 8 one side, thereby need not integrate BMS module 3 in the casing alone, the step of BMS module 3 integration has been saved, thereby simplify the arrangement of BMS module 3 among battery module 100, the space utilization in battery module 100 has been improved, do benefit to the miniaturized design that realizes battery module 100.

As shown in fig. 2, the bus bar 4 is mounted at the bottom of the accommodating space 8, and the pole of the battery cell 2 abuts against the bus bar 4. That is to say, busbar 4 installs between the bottom of accommodation space 8 and the utmost point post of electricity core 2, and the utmost point post of electricity core 2 supports and presses in busbar 4's upper surface, and busbar 4 installs in the below of electricity core 2 promptly to utilize electricity core 2's dead weight to realize fixing busbar 4, thereby need not weld busbar 4 on electricity core 2 alone, thereby saved the welded step, do benefit to and simplify the installation link, improve production efficiency, reduction in production cost.

According to the battery module 100 provided by the embodiment of the utility model, the bus bar 4 is arranged at the bottom of the accommodating space 8, and the pole of the battery cell 2 is abutted against the bus bar 4, so that the bus bar 4 is fixed by using the self weight of the battery cell 2, the structural arrangement in the battery module 100 is compact, the space utilization rate in the battery module 100 is improved, and the energy density of a battery pack is favorably improved.

As shown in fig. 2, in some embodiments, the bus bars 4 are multiple, and the multiple bus bars 4 are distributed on the bottom plate 11 at intervals, so that the multiple bus bars 4 can be mounted separately, and the assembly difficulty is reduced, and the battery cells 2 are also multiple groups, and the poles of the multiple groups of battery cells 2 are respectively abutted against the upper surfaces of the multiple bus bars 4. From this, can be in the length direction of busbar 4 for the utmost point post of multiunit electricity core 2 offsets with the upper surface of busbar 4 in proper order, and then the reinforcing utilizes the dead weight of electricity core 2 to the fixed action of busbar 4.

Further, the plurality of busbars 4 are electrically connected, so that the plurality of busbars 4 are communicated with each other to form a busbar assembly, and two busbars 4 of the plurality of busbars 4 are provided with output electrodes 41, and the output electrodes 41 penetrate the side frame 12 and extend to the external mounting space 9 to be electrically connected with the electrical component 10.

As shown in fig. 2, it is preferable that two busbars 4 adjacent to both sides of the accommodating space 8 among the plurality of busbars 4 are respectively provided with one output pole 41, and the output poles 41 are arranged toward the outer installation space 9, wherein, the side frame 12 is provided with a structure of avoiding holes or avoiding grooves, so that the two output electrodes 41 can respectively extend to the external installation space 9 through the avoiding holes or avoiding grooves, thereby, the electrical connection between the bus bar 4 and the electrical component 10 is realized, and by this arrangement, the distance between the bus bar 4 and the electrical component 10 can be shortened, and the structure of the wiring harness between the bus bar 4 and the electrical component 10 can be omitted, so that the bus bar 4 can be directly connected with the electrical component 10, thereby make battery module 100's structure compacter, do benefit to and save installation space, improve the space utilization in the battery module 100, do benefit to the energy density who improves the battery package.

Specifically, as shown in fig. 2, each group of battery cells 2 includes a plurality of sub-battery cells 21, the plurality of sub-battery cells 21 may be sequentially arranged along the length direction of the base 1, and the poles of the plurality of sub-battery cells 21 respectively abut against the bus bar 4 at a plurality of positions in the length direction of the bus bar 4. From this, can make the utmost point post of a plurality of sub-electric cores 21 of same group electric core 2 can offset with same busbar 4, and then be convenient for reduce the quantity of busbar 4, and can make the gravity of the sub-electric core 21 that receives on the length direction of busbar 4 even, and then strengthen busbar 4's structural stability.

In some embodiments, as shown in fig. 2, the battery module 100 further includes: a sampling piece 5.

The sampling piece 5 is installed in the accommodating space 8 and located at the bottom of the battery cell 2, the sampling piece 5 is spaced apart from the bus bar 4 and the sampling piece 5 is located between two poles, and at least a part of the sampling piece 5 extends to the external installation space 9 to be electrically connected with the BMS module 3. That is to say, sampling 5 can be located between bottom plate 11 and electric core 2 promptly, and in the width direction of sampling 5, sampling 5 and busbar 4 are spaced apart to be set up, are convenient for guarantee that can not produce the influence of each other between sampling 5 and the busbar 4, and sampling 5 is located between two utmost points posts of same electric core 2, preferably, the width of sampling 5 can be according to the distance between two utmost points posts of same electric core 2 and the adaptability design.

Preferably, the width of the sampling member 5 is the same as the distance between two poles of the same electrical core 2, so that, in the actual installation process, the sampling member 5 can be installed in the space between the upper surface of the busbar 4 and the two poles of the same electrical core 2, and the sampling member 5 can be fixed in the width direction of the sampling member 5 through the two poles of the same electrical core 2, thereby preventing the sampling member 5 from moving, so that the sampling member 5 can be fixed by utilizing the self structure of the electrical core 2 and the self weight of the electrical core 2, the sampling member 5 can be fixed without separately arranging other fixing structures, the structural stability of the sampling member 5 is enhanced, meanwhile, the installation space between the two poles of the same electrical core 2 is fully utilized by the arrangement position of the sampling member 5, the space utilization rate in the battery module 100 is further improved, and the energy density of the battery pack is improved, the battery module 100 can be designed in a compact size.

As shown in fig. 2, sampling piece 5 and busbar 4 are a plurality of, and a plurality of busbars 4 and a plurality of sampling piece 5 are at the upper surface interval distribution of bottom plate 11, sampling piece 5 and busbar 4 set up the quantity and can design according to the quantity of electric core 2, and in the width direction of sampling piece 5, sampling piece 5 and busbar 4 are spaced apart and distributed, thereby need not overlap sampling piece 5 and busbar 4 in the upper and lower direction and set up, be convenient for make sampling piece 5 and busbar 4 set up at the interval in the horizontal direction, thereby make full use of installation space in battery module 100, and make arranging of the structure in battery module 100 compacter, do benefit to the miniaturized design that realizes battery module 100.

Further, as shown in fig. 2, the plurality of sampling pieces 5 and the plurality of busbars 4 are distributed alternately in the width direction of the bottom plate 11. It can be understood that, the distribution direction of a plurality of sampling pieces 5 and a plurality of busbar 4 depends on the distribution direction of electric core 2, preferably, sampling pieces 5 and busbar 4 are distributed in a staggered manner in the width direction of bottom plate 11, that is, the installation relationship of sampling pieces 5, busbar 4 and electric core 2 can be satisfied, and the installation space in battery module 100 can be fully utilized, so that the arrangement of the structure in battery module 100 is more compact, and the structural design of battery module 100 is optimized.

Specifically, as shown in fig. 2, each group of cells 2 includes at least two sub-cells 21, each sub-cell 21 has two terminals, a mounting gap is defined between the two terminals of each sub-cell 21, and the sampling member 5 sequentially penetrates through the mounting gaps of the at least two sub-cells 21. From this, can make sampling piece 5 and busbar 4 spaced apart on the width direction of bottom plate 11, and be convenient for realize the fixed to sampling piece 5 on sampling piece 5's width direction through two utmost points post of same sub-electric core 21, prevent that the drunkenness from appearing in sampling piece 5, thereby realize the fixed to sampling piece 5 when utilizing two utmost points post of same sub-electric core 21 and electric core 2's dead weight, do not need to set up other fixed knot structure alone alright realize the fixed to sampling piece 5, the structural stability of reinforcing sampling piece 5, and simultaneously, sampling piece 5 set up the installation space between the position make full use of two utmost points posts, further improved the space utilization in the battery module 100, do benefit to the energy density who improves the battery package, can realize the miniaturized design of battery module 100.

In some embodiments, as shown in fig. 3, the battery module 100 further includes: cross beams 6 and longitudinal beams 7.

The cross member 6 and the longitudinal member 7 are installed in the accommodation space 8 and divide the accommodation space 8 into a plurality of subspaces 81. Preferably, crossbeam 6 and longeron 7 can cross the setting to separate accommodation space 8 for four subspaces 81, from this, electric core 2 can be placed alone in every subspace 81 to the homoenergetic, and then be convenient for strengthen battery module 100's energy density, and be convenient for electric core 2 individual design in every subspace 81, do benefit to and reduce the design and arrange the degree of difficulty.

Wherein the cross beams 6 and/or the longitudinal beams 7 define bus bar escape slots with the floor 11. For example, a bus bar avoiding groove may be defined between the cross beam 6 and the bottom plate 11, or a bus bar avoiding groove may be defined between the longitudinal beam 7 and the bottom plate 11, preferably, in the present invention, a bus bar avoiding groove is defined between the cross beam 6 and the bottom plate 11, it can be understood that a bus bar avoiding groove is formed in a direction perpendicular to a length direction of the bus bar 4, so that the bus bar 4 can be directly inserted into the bus bar avoiding groove when being installed, the bus bar 4 is limited by a peripheral wall of the bus bar avoiding groove, and meanwhile, the bus bar avoiding groove and a self weight of the battery cell 2 simultaneously play a role in fixing the bus bar 4, so that the structural stability of the bus bar 4 can be further enhanced.

The bus bar 4 penetrates through the bus bar avoiding groove to electrically connect the battery cells 2 in the two adjacent subspaces 81. That is to say, the bus bar 4 passes through the bus bar avoiding groove to penetrate through the two adjacent subspaces 81 in the length direction of the bus bar 4, so that the poles of the battery cells 2 in the two adjacent subspaces 81 in the length direction of the bottom plate 11 can be abutted against each other by the same bus bar 4, and the bus bar 4 is further used for electrically connecting the battery cells 2 in the two adjacent subspaces 81.

The utility model also provides a battery pack.

According to the battery pack of the embodiment of the utility model, the bus bar 4 is arranged at the bottom of the accommodating space 8, and the pole of the battery cell 2 is abutted against the bus bar 4, so that the bus bar 4 is fixed by using the self weight of the battery cell 2, the structural arrangement of the battery pack 100 is compact, the space utilization rate in the battery pack 100 is improved, and the energy density of the battery pack is favorably 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 present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

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. A battery module (100), comprising:

the base (1), the base (1) comprises a bottom plate (11) and a side frame (12), the bottom plate (11) and the side frame (12) define a containing space (8) and an external installation space (9) located outside the containing space (8);

the battery cell (2), the battery cell (2) is arranged in the accommodating space (8);

a BMS module (3), the BMS module (3) being mounted in the external mounting space (9) and electrically connected to the battery cell (2);

the bus bar (4), the bus bar (4) install in the bottom of accommodation space (8), just the utmost point post of electricity core (2) with bus bar (4) offset.

2. The battery module (100) according to claim 1,

the bus bars (4) are multiple, and the multiple bus bars (4) are distributed on the bottom plate (11) at intervals;

the battery cell (2) is provided with a plurality of groups, and the pole columns of the battery cell (2) are respectively abutted against the upper surfaces of the busbar (4).

3. The battery module (100) according to claim 2, wherein a plurality of the bus bars (4) are electrically connected, and two of the bus bars (4) of the plurality of the bus bars (4) are provided with output electrodes (41), the output electrodes (41) penetrating the side frame (12) and extending to the external mounting space (9) to be electrically connected with electrical members (10).

4. The battery module (100) according to claim 2, wherein each group of the cells (2) comprises a plurality of sub-cells (21), and the poles of the plurality of sub-cells (21) respectively abut against the busbar (4) at a plurality of positions in the length direction of the busbar (4).

5. The battery module (100) according to any one of claims 1-4, further comprising: sampling spare (5), sampling spare (5) install in accommodation space (8) and be located the bottom of electric core (2), sampling spare (5) with busbar (4) spaced apart just sampling spare (5) are located same two of electric core (2) between the utmost point post, at least part of sampling spare (5) extends outside installation space (9) with BMS module (3) electricity is connected.

6. The battery module (100) according to claim 5, wherein the sampling member (5) and the bus bar (4) are each plural, and the plural bus bars (4) and the plural sampling members (5) are distributed at intervals on the upper surface of the base plate (11).

7. The battery module (100) according to claim 6, wherein the plurality of sampling members (5) and the plurality of bus bars (4) are distributed in a staggered manner in a width direction of the bottom plate (11).

8. The battery module (100) according to claim 5, wherein the battery cells (2) are in multiple groups, each group of the battery cells (2) comprises at least two sub-battery cells (21), a mounting gap is defined between two poles of each sub-battery cell (21), and the sampling member (5) sequentially penetrates through the mounting gaps of at least two sub-battery cells (21).

9. The battery module (100) according to any one of claims 1-4, further comprising: the transverse beam (6) and the longitudinal beam (7), the transverse beam (6) and the longitudinal beam (7) are installed in the accommodating space (8) and divide the accommodating space (8) into a plurality of subspaces (81); wherein

Crossbeam (6) and/or longeron (7) with bottom plate (11) inject busbar (4) and dodge the groove, busbar (4) wear to locate busbar (4) dodge the groove in order to be adjacent two in subspace (81) electricity core (2) electricity is connected.

10. A battery pack, characterized in that the battery module (100) according to any one of claims 1 to 9 is provided.

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