CN218887463U - Battery module assembly and battery pack - Google Patents

Abstract

The utility model provides a battery module subassembly and battery package, battery module subassembly include multiunit battery module and busbar, and the bottom surface of every electric core is equipped with explosion-proof valve, and battery module terminal surface is located to the busbar. According to the battery module assembly with the structure, the bus bar is arranged on the end face of the battery module, and the bus bar and the anti-explosion valve are arranged in a different surface mode, so that thermal-electrical separation is realized, and when condensation or coolant leakage is generated inside a battery pack, the problems of poor insulation and pressure resistance or short circuit can be effectively avoided; meanwhile, if the battery core is out of control due to heat, the insulating protection of the busbar is prevented from being damaged by eruption of the battery core, and the safety performance of the battery module assembly in the out of control due to heat is effectively improved; because utmost point post has the take the lateral space of electric core, and electric core homonymy is located to the positive post and the negative pole post of electric core in the module subassembly of this structure, compares that positive post and negative pole post locate two relative side occupation spaces of electric core relatively little, and battery module compact structure, space utilization is high.

Description

Battery module assembly and battery pack

Technical Field

The utility model relates to a battery technology field, concretely relates to battery module subassembly and battery package.

Background

The battery cell top surface sets up utmost point post and explosion-proof valve, and a plurality of electric cores connect into the battery module, and the battery module connects into the battery package through the busbar, and when the battery package was constituteed to electric core, explosion-proof valve up, explosion-proof valve upper portion need reserve the exhaust space of take the altitude, and the ball that the take the altitude need be reserved in battery package bottom simultaneously hits the space, hits the space for make full use of battery package bottom ball, through invering electric core in order to utilize battery package bottom ball among the prior art to hit the space exhaust.

The battery core inversion busbar and the explosion-proof valve are arranged at the bottom, the busbar is close to the explosion-proof valve, and when condensation or coolant leakage is generated inside the battery pack, poor insulation and voltage resistance or short circuit problems are easily caused; in extreme cases, when the thermal runaway of the battery cell occurs, the insulation protection of the busbar is easily damaged by the battery cell eruption materials sprayed out of the explosion-proof valve, so that the problem of short circuit or arc discharge is caused.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that produces withstand voltage badly easily or the short circuit when electric core among the prior art is invertd.

To this end, the utility model provides a battery module subassembly, include

Each group of battery modules comprises a plurality of battery cells, each battery cell is provided with a bottom surface and a first end surface, the bottom surface of each battery cell is provided with an explosion-proof valve, each first end surface is provided with a positive pole column and a negative pole column, and two ends of each group of battery modules are provided with an output positive pole and an output negative pole;

and the bus bar is arranged on the end face of the battery module and is connected with the output positive electrode and the output negative electrode of all the battery modules.

Optionally, in the above battery module assembly, the battery modules have an even number of groups, multiple groups of the battery modules are sequentially arranged in the same row, and adjacent battery modules are connected in series through the bus bar.

Optionally, in the above battery module assembly, the battery modules are provided with at least four groups, the first end faces of the multiple groups of battery modules are arranged in opposite directions, and the bus bar includes a total positive conductive bar, a total negative conductive bar, a first conductive bar and a second conductive bar;

the terminal surface of battery module includes preceding terminal surface and rear end face, four of them in the battery module, total positive conducting bar with total negative conducting bar electricity respectively connects both sides output positive pole and output negative pole on the preceding terminal surface of battery module, two in the middle of first conducting bar connects output positive pole and output negative pole on the preceding terminal surface of battery module, the electrically conductive row connection of second sets up in opposite directions output positive pole and output negative pole on the rear end face of battery module.

Optionally, in the above battery module assembly, the total positive conducting bar and the total negative conducting bar are stacked on the first conducting bar, and a total positive leading-out electrode and a total negative leading-out electrode are respectively disposed at opposite ends of the total positive conducting bar and the total negative conducting bar.

Optionally, in the battery module assembly, the total positive conducting bar and the total negative conducting bar are respectively disposed on two sides of the first conducting bar, and a total positive leading-out electrode and a total negative leading-out electrode are respectively disposed at ends of the total positive conducting bar, which are opposite to the ends of the total negative conducting bar.

Optionally, in the battery module assembly, end plates are respectively arranged on two end faces of the battery module, grooves are formed in the end plates, and the bus bar is arranged in the grooves.

Optionally, in the above battery module assembly, the battery modules have odd groups, multiple groups of the battery modules are sequentially arranged in the same row, and adjacent battery modules are connected in series through the bus bar.

Optionally, in the above battery module assembly, a first insulating member is disposed between the first end surfaces of the adjacent battery modules.

Optionally, in the above battery module assembly, each group of the plurality of the battery cells of the battery module are connected in series through the first connecting piece.

The utility model provides a battery pack, including any one of the above-mentioned battery module subassembly and block terminal, battery module subassembly includes total positive extraction pole and total negative extraction pole, total positive extraction pole with total negative extraction pole is connected respectively the anodal input and the negative pole input of block terminal.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a battery module assembly, explosion-proof valve locate the electric core bottom surface, anodal post and negative pole post are located on the first terminal surface of electric core, when the battery module assembly is constituteed to the electric core, the electric core bottom surface is down, first terminal surface and electric core bottom surface heterofacial features, the busbar is located battery module terminal surface, the busbar sets up with explosion-proof valve heterofacial features, realize the thermal power separation, when the battery package is inside to produce the condensation or the coolant liquid is revealed, can effectively avoid insulating withstand voltage badly or the short circuit problem; meanwhile, if the battery cell is out of control due to heat, the bus bar and the explosion-proof valve are out of plane, so that the phenomenon that the insulation protection of the bus bar is damaged by eruption of the battery cell is prevented, and the safety performance of the battery module assembly in the out of control due to heat is effectively improved; because utmost point post has a take the altitude, and utmost point post occupies the lateral space of electric core, and electric core homonymy is located to anodal post and the negative pole post of electric core in the module subassembly of this structure, and it is little to compare anodal post and negative pole post and locate two relative side occupation spaces of electric core relatively, and battery module compact structure, space utilization is high.

2. The battery module is equipped with even group to two liang of settings in opposite directions of first terminal surface of battery module, be convenient for through the busbar series connection each group battery module, can make the total positive conducting bar and the total negative conducting bar of battery module subassembly lie in the module homonymy simultaneously, so that connect the block terminal.

Drawings

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

Fig. 1 is a schematic view of a battery module in a battery module assembly provided in embodiment 1 of the present invention;

fig. 2 is a schematic view of a battery module in the battery module assembly provided in embodiment 1 of the present invention;

fig. 3 is an exploded view of a battery module assembly provided in embodiment 1 of the present invention;

fig. 4 is a schematic front-side angle view of a battery module assembly provided in embodiment 1 of the present invention;

fig. 5 is a schematic diagram of a rear side angle of a battery module assembly provided in embodiment 1 of the present invention;

fig. 6 is a schematic view of a battery pack provided in embodiment 2 of the present invention;

fig. 7 is a schematic view of a modified embodiment of a battery module assembly provided in embodiment 1 of the present invention;

fig. 8 is a schematic diagram of a modified embodiment of a battery pack according to embodiment 2 of the present invention.

Description of reference numerals:

1. a battery module; 11. an electric core; 111. a first end face; 112. an explosion-proof valve; 12. a first connecting piece; 13. outputting a positive electrode; 14. outputting a negative electrode; 15. a front end face; 16. a rear end face; 17. an end plate; 21. a total positive conductive bar; 211. a total positive lead-out electrode; 22. a total negative conducting bar; 221. a total negative extraction electrode; 23. a first conductive bar; 24. a second conductive bar; 3. a distribution box; 4. a housing.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, 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 simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. 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 invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The embodiment provides a battery module assembly, as shown in fig. 1 to 5, which includes a plurality of sets of battery modules 1 and a bus bar, wherein each set of battery module 1 includes a plurality of battery cells 11, each battery cell 11 has a bottom surface and a first end surface 111, the bottom surface of each battery cell 11 is provided with an explosion-proof valve 112, each first end surface 111 is provided with a positive pole column and a negative pole column, and two ends of each set of battery module 1 are provided with an output positive pole 13 and an output negative pole 14; the bus bar is provided on the end face of the battery module 1, and connects the output positive electrodes 13 and the output negative electrodes 14 of all the battery modules 1.

The battery module assembly with the structure is characterized in that the explosion-proof valve 112 is arranged on the bottom surface of the battery cell 11, the positive pole column and the negative pole column are arranged on the first end surface 111 of the battery cell 11, when the battery cell 11 forms the battery module assembly, the bottom surface of the battery cell 11 faces downwards, the first end surface 111 is opposite to the bottom surface of the battery cell 11, the busbar is arranged on the end surface of the battery module 1, the busbar and the explosion-proof valve 112 are opposite, thermal power separation is realized, and when condensation or cooling liquid leakage is generated inside a battery pack, the problem of poor insulation or short circuit can be effectively avoided; meanwhile, if the battery cell 11 is out of control due to heat, the bus bar is out of plane with the explosion-proof valve 112, so that the phenomenon that the insulation protection of the bus bar is damaged by eruption of the battery cell 11 is prevented, and the safety performance of the battery module assembly in the case of out of control due to heat is effectively improved; because utmost point post has a take the altitude, and utmost point post occupies the lateral space of electric core 11, and 11 homonymies of electric core are located to anodal post and the negative pole post of electric core 11 in the module subassembly of this structure, and it is little to compare anodal post and negative pole post and locate two relative side occupation spaces of electric core 11 relatively, and battery module 1 compact structure, space utilization is high.

A plurality of electric cores 11 in every group battery module 1 laminate in proper order, connect through first connection piece 12 between a plurality of electric cores 11 of every group battery module 1, and the anodal post of output 13 is connected to the positive post of every group battery module one end, and the negative pole 14 of output is connected to the negative pole post of every group battery module other end. Optionally, the cell is a square cell.

Referring to fig. 3 to 5, the first end surface 111 of the battery module 1 is composed of the first end surfaces 111 of the plurality of battery cells 11, the battery module 1 has even number groups, the plurality of battery modules 1 are sequentially arranged in the same row, and the adjacent battery modules 1 are connected in series through the bus bar, so that the total positive conducting bar 21 and the total negative conducting bar 22 of the battery module assembly are located at the same side of the module so as to be connected with the distribution box 3.

Preferably, the first end surfaces 111 of the battery modules 1 are arranged in pairs in opposite directions, so as to connect the battery modules 1 in series through the bus bars, and at the same time, the total positive conducting bar 21 and the total negative conducting bar 22 of the battery module assembly can be positioned at the same side of the modules so as to connect the distribution box 3.

For example, the battery module 1 is provided with four sets of bus bars including a total positive conductor bar 21, a total negative conductor bar 22, a first conductor bar 23, and a second conductor bar 24; the first end faces 111 of the four battery modules 1 are arranged oppositely, the end faces of the battery modules 1 comprise front end faces 15 and rear end faces 16, the total positive conducting bar 21 and the total negative conducting bar 22 are respectively and electrically connected with the output positive electrodes 13 and the output negative electrodes 14 on the front end faces 15 of the battery modules 1 on two sides, the first conducting bar 23 is connected with the output positive electrodes 13 and the output negative electrodes 14 on the front end faces 15 of the two battery modules 1 in the middle, and the second conducting bar 24 is connected with the output positive electrodes 13 and the output negative electrodes 14 on the rear end faces 16 of the battery modules 1 arranged oppositely. Referring to fig. 3 to 5, each group of battery modules 1 sequentially arranged from left to right is a first battery module 1, a second battery module 1, a third battery module 1 and a fourth battery module 1, the first battery module 1 and the first end surface 111 of the second battery module 1 are oppositely arranged, the third battery module 1 and the first end surface 111 of the fourth battery module 1 are oppositely arranged, the output positive electrode 13 and the output negative electrode 14 of each battery module 1 are respectively located at the front end and the rear end of the battery module 1, for example, the front end of the first battery module 1 is a first output negative electrode and the rear end thereof is a first output positive electrode, the rear end of the second battery module 1 is a second output negative electrode and the front end thereof is a second output positive electrode, the front end of the third battery module 1 is a third output negative electrode and the rear end thereof is a third output positive electrode, the rear end of the fourth battery module 1 is a fourth output negative electrode and the front end thereof is a fourth output positive electrode, the total negative electrode bank 22 is connected with the first output negative electrode 14, the second positive electrode bank is connected with the second positive electrode bank 24, the total negative electrode bank 22, the total negative electrode bank is connected with the second positive electrode bank 21, and the second positive electrode bank is connected with the total negative electrode bank.

Referring to fig. 1 and 2, a plurality of battery cells 11 of any battery module 1 are connected in series through a first connecting piece 12, an output positive electrode 13 and an output negative electrode 14 are conducting strips, the output positive electrode 13 is connected with a positive post of one end battery cell 11 of the battery module 1, and the output negative electrode 14 is connected with a negative post of the other end battery cell 11 of the battery module 1. Optionally, the first connection tab 12 is aluminum bar.

Optionally, referring to fig. 3 and 4, the total positive conducting bar 21 and the total negative conducting bar 22 are stacked on the first conducting bar 23, and one end of the total positive conducting bar 21 opposite to one end of the total negative conducting bar 22 is respectively provided with a total positive leading-out electrode 211 and a total negative leading-out electrode 221, referring to fig. 6, the total positive leading-out electrode 211 and the total negative leading-out electrode 221 are arranged close to each other and can cooperate with the square distribution box 3 to form a convex-shaped battery pack, and two sides of a protruding portion of the battery pack are used for avoiding other electric devices on the whole vehicle.

Referring to fig. 1 to 5, the front end face 15 and the rear end face 16 of the battery module 1 are respectively provided with an end plate 17, the end plate 17 is provided with a groove, the bus bar is arranged in the groove, the end face of the bus bar does not exceed the outer plane of the end plate 17, the bus bar does not need to occupy extra installation space, the groove is clamped with the bus bar to fix the bus bar, an additional fixing structure is not needed to fix the bus bar, and space and part cost are saved.

One end of an output anode 13 of each battery module 1 is connected with the anode post, and the other end extends into the groove of the end plate 17, and similarly, one end of an output cathode 14 of each battery module 1 is connected with the cathode post, and the other end extends into the groove of the end plate 17. The first conductive bar 23 is arranged in the grooves of the two middle end plates 17, and the total negative conductive bar 22 and the total positive conductive bar 21 are stacked on the first conductive bar 23. The total positive lead-out 211 and the total negative lead-out 221 are provided protruding outward of the end plate 17 to connect the positive input terminal and the negative input terminal of the distribution box 3.

The outer walls of the total positive conductor bar 21, the total negative conductor bar 22, the first conductor bar 23 and the second conductor bar 24 are all wrapped with insulating layers. Preferably, a fireproof insulating plate is further arranged between the total positive conductive bar 21, the total negative conductive bar 22 and the first conductive bar 23, and plays a role of insulation and fire prevention when the insulating layer of each conductive bar per se fails.

A first insulating member is disposed between the first end surfaces 111 of the adjacent battery modules 1 to insulate and separate the first connecting pieces 12 disposed opposite to each other. For example, the first insulating member may be an insulating plate.

As a first alternative embodiment of embodiment 1, the plurality of battery cells 11 of each group of battery modules 1 may also be connected in parallel, and each group of battery modules 1 may also be connected in parallel.

As a second alternative embodiment of example 1, referring to fig. 7, the total positive conducting bar 21 and the total negative conducting bar 22 are respectively disposed on two sides of the first conducting bar 23, one end of the total positive conducting bar 21 opposite to the one end of the total negative conducting bar 22 is respectively provided with a total positive extraction electrode 211 and a total negative extraction electrode 221, the total positive extraction electrode 211 and the total negative extraction electrode 221 are disposed on two sides of the front end of the battery module assembly, and can cooperate with the elongated distribution box 3 to form a rectangular battery pack, and the structure of the battery pack is regular.

As a third alternative embodiment of example 1, any even number of two, six, eight, etc. battery modules 1 may be provided, and a corresponding number of bus bars may be provided to connect the battery modules 1. The first end surfaces 111 of the multiple groups of battery modules can be arranged back to back in pairs, and the first end surfaces of the multiple groups of battery modules can be arranged randomly as long as the first end surfaces are arranged in the same row, so that the first end surfaces of the modules are arranged in the same row.

As further deformation mode, battery module 1 still can set up the odd number group, and multiunit battery module 1 arranges in proper order with arranging, and adjacent battery module 1 passes through busbar series connection. The total positive electrode bar 21 and the total negative electrode bar 22 of the battery module assembly may be disposed at opposite sides thereof.

Example 2

The embodiment provides a battery pack, including battery module subassembly and block terminal 3 in embodiment 1, the battery module subassembly includes always positive and leads electrical bar 21 and always negative and leads electrical bar 22, is equipped with always positive extraction 211 and always negative extraction 221 on always positive and lead electrical bar 21 and always negative and lead electrical bar 22 respectively, and always positive extraction 211 and always negative extraction 221 are connected the positive input end and the negative input end of block terminal 3 respectively.

The busbar in the battery pack is arranged on the different surface of the explosion-proof valve 112, so that thermal power is separated, and the problems of poor insulation and pressure resistance or short circuit can be effectively avoided; if electric core 11 takes place the thermal runaway simultaneously, can prevent that electric core 11 eruption thing from destroying the insulation protection of busbar, the security performance when effectively improving battery module subassembly thermal runaway.

Referring to fig. 6 and 8, the battery pack further includes a case 4, and the battery module assembly and the distribution box 3 are provided in the case 4.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims (10)

1. A battery module assembly, comprising:

the battery module comprises a plurality of groups of battery modules (1), each group of battery module (1) comprises a plurality of battery cells (11), each battery cell (11) is provided with a bottom surface and a first end surface (111), the bottom surface of each battery cell (11) is provided with an explosion-proof valve (112), each first end surface (111) is provided with a positive pole column and a negative pole column, and two ends of each group of battery module (1) are provided with an output positive pole (13) and an output negative pole (14);

and the bus bar is arranged on the end face of the battery module (1), and the bus bar is connected with the output positive electrode (13) and the output negative electrode (14) of all the battery modules (1).

2. The battery module assembly according to claim 1, wherein the battery modules (1) have an even number of groups, a plurality of the sets of the battery modules (1) are arranged in series in the same row, and adjacent battery modules (1) are connected in series by the bus bar.

3. The battery module assembly according to claim 2, wherein the battery modules (1) are provided with at least four groups, the first end surfaces (111) of the groups of battery modules (1) are arranged in pairs facing each other, and the bus bars comprise a total positive conductive bar (21), a total negative conductive bar (22), a first conductive bar (23) and a second conductive bar (24);

the terminal surface of battery module (1) includes preceding terminal surface (15) and rear end face (16), four of them in battery module (1), total positive is led electrical bar (21) and total negative is led electrical bar (22) to connect both sides respectively output positive pole (13) and output negative pole (14) on battery module's (1) preceding terminal surface (15), two in the middle of first leading electrical bar (23) is connected output positive pole (13) and output negative pole (14) on battery module's (1) preceding terminal surface (15), second is led electrical bar (24) to connect and is set up in opposite directions output positive pole (13) and output negative pole (14) on battery module's (1) rear end face (16).

4. The battery module assembly according to claim 3, wherein the total positive conductive bar (21) and the total negative conductive bar (22) are stacked on the first conductive bar (23), and a total positive extraction electrode (211) and a total negative extraction electrode (221) are respectively arranged at opposite ends of the total positive conductive bar (21) and the total negative conductive bar (22).

5. The battery module assembly according to claim 3, wherein the total positive conductive bar (21) and the total negative conductive bar (22) are respectively arranged on two sides of the first conductive bar (23), and a total positive extraction electrode (211) and a total negative extraction electrode (221) are respectively arranged at opposite ends of the total positive conductive bar (21) and the total negative conductive bar (22).

6. The battery module assembly according to any one of claims 1 to 5, wherein end plates (17) are provided on both end surfaces of the battery module (1), respectively, and grooves are provided on the end plates (17), and the bus bars are provided in the grooves.

7. The battery module assembly according to claim 1, wherein the battery modules (1) have an odd number of groups, a plurality of the battery modules (1) are arranged in series in the same row, and the adjacent battery modules (1) are connected in series by the bus bar.

8. The battery module assembly according to any one of claims 3 to 5, wherein a first insulating member is provided between the first end surfaces (111) of the adjacent battery modules (1).

9. The battery module assembly according to any one of claims 1 to 5, characterized in that the plurality of battery cells (11) of each group of battery modules (1) are connected in series by a first connecting piece (12).

10. A battery pack, characterized in that it comprises a battery module assembly according to any one of claims 1 to 9 and a distribution box (3), said battery module assembly comprising a total positive lead-out (211) and a total negative lead-out (221), said total positive lead-out (211) and said total negative lead-out (221) being connected to a positive input terminal and a negative input terminal, respectively, of said distribution box (3).

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