CN214477761U

CN214477761U - Battery module and battery pack

Info

Publication number: CN214477761U
Application number: CN202120835684.2U
Authority: CN
Inventors: 朱圣法; 白玉龙; 李登科; 何亚飞
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-10-22
Anticipated expiration: 2031-04-22

Abstract

The utility model belongs to the technical field of the battery, a battery module and a battery pack are disclosed, two groups of busbars of the battery module are connected with an upper cover plate, when the upper cover plate is covered on an opening of a containing groove, the busbars can be inserted into the containing groove along the vertical direction and are butted with a corresponding row of polar lugs, and the busbars can not strongly interfere with the polar lugs, so that the installation of the upper cover assembly is convenient, the assembly of the battery module is easy to operate, and the quality of the battery module is convenient to control; when thermal runaway occurs at the lug of the battery cell, the heat insulation piece of the battery module can prevent high-temperature gas from being sprayed upwards, the thermal runaway protection capability of the battery module is enhanced, and the safety of the battery module is improved; the safety of the battery pack is high, the production efficiency of the battery pack is high, and the production cost is reduced.

Description

Battery module and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery module and battery package.

Background

With the development of new energy automobiles, the demand for power batteries is continuously increased, and meanwhile, the performance requirements for the power batteries are also continuously increased, generally, a power battery pack is composed of a plurality of battery modules, the battery modules are composed of a battery cell stack body, a battery module outer frame, a bus bar and the like, the traditional bus bar is usually installed in a mode that the traditional bus bar penetrates out from the width direction of a lug of the battery cell stack body, however, the lug and the bus bar are interfered by the installation mode, so that the installation process is very complicated, the efficiency is low, and the cost is high; in addition, when electric core takes place the thermal runaway, high-temperature gas very easily erupts from utmost point ear department upwards, causes the damage to the upper cover of battery module.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module and battery package to avoid busbar and utmost point ear to take place to interfere when the assembly, simplify the installation flow of battery module, promote the assembly efficiency of battery module, strengthen the thermal runaway protection of battery module simultaneously.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a battery module, including battery module frame and electric core subassembly, the electric core subassembly set up in the battery module frame, the electric core subassembly includes a plurality of electric cores and a plurality of utmost point ear, and a plurality of the electric cores are piled up and set up, the utmost point ear set up in the one end of electric core, so that a plurality of the utmost point ear is two rows of settings, the battery module frame includes frame main part and upper cover subassembly, the frame main part is provided with the storage tank, the electric core subassembly can hold in the storage tank; the upper cover assembly includes:

the upper cover plate can be arranged on the opening of the containing groove in a covering mode;

the two groups of bus bars are respectively connected to two ends of the upper cover plate, and the bus bars can be inserted into the accommodating grooves along the vertical direction and are abutted with the corresponding one group of tabs;

the two groups of heat insulation pieces are arranged on one side, close to the electric core assembly, of the upper cover plate and are positioned above the corresponding row of tabs; and

two sets of FPC boards, the FPC board with correspond a set of the busbar links to each other, and is a set of the FPC board can with correspond one row the utmost point ear electricity is connected.

Preferably, the bus bar includes:

the bracket is of a flat plate type structure and is connected with the upper cover plate; and

and the bus bar main bodies are arranged at intervals and are connected with the bracket, so that the bus bars are comb-shaped.

Preferably, the outer frame main body includes:

the two groups of side plates are arranged at intervals and in parallel;

the bottom plate is connected to one ends of the two groups of side plates; and

and the end plates are arranged at intervals, are perpendicular to the side plates and the bottom plate and are connected with the side plates and the bottom plate to form the accommodating groove.

Preferably, a side surface of the base plate, which is close to the electric core assembly, is provided with heat conducting glue, so that the electric core assembly is bonded and connected with the base plate.

Preferably, a structural adhesive is arranged on one side surface of the upper cover plate, which is close to the electric core assembly, so that the electric core assembly is bonded and connected with the upper cover plate.

Preferably, the electric core assembly further comprises:

and the heat insulation buffer parts are clamped between every two battery cores.

Preferably, an end of the heat insulation buffer along the length direction is flush with an end of the tab far away from the battery cell.

Preferably, the width of the heat insulation buffer is the same as the width of the battery cell.

The utility model also provides a battery package, including shell, thermal management subassembly and a plurality of battery module.

The utility model has the advantages that:

the utility model provides a battery module includes battery module frame and electric core subassembly, and the electric core subassembly sets up in battery module frame, and the electric core subassembly includes a plurality of electric cores and a plurality of utmost point ear, and a plurality of electric cores are piled up and are set up, and utmost point ear sets up in the one end of electric core to make a plurality of utmost point ear be two rows of settings, and battery module frame includes frame main part and upper cover subassembly, and the frame main part is provided with the storage tank, and the electric core subassembly can hold in the storage tank; the upper cover assembly comprises an upper cover plate, two groups of busbars, two groups of heat insulation pieces and two groups of FPC boards, and the upper cover plate can be covered on the opening of the accommodating groove; the two groups of busbars are respectively connected to two ends of the upper cover plate, when the upper cover plate is covered on the opening of the accommodating groove, the busbars can be inserted into the accommodating groove along the vertical direction and abut against a corresponding row of lugs, and when the upper cover assembly is installed on the outer frame of the battery module and the battery module assembly along the vertical direction, the busbars cannot be strongly interfered with the lugs due to the free state of the lugs, so that the installation of the upper cover assembly is facilitated, the assembly of the battery module is easy to operate, and the quality of the battery module is conveniently controlled; the two groups of heat insulation pieces are arranged on one side, close to the cell assembly, of the upper cover plate and are positioned above the corresponding row of tabs, when thermal runaway occurs at the tabs of the cell, the heat insulation pieces can prevent high-temperature gas from being sprayed upwards, the thermal runaway protection capability of the battery module is enhanced, and the safety of the battery module is improved; the FPC board is connected with the corresponding group of busbars, and the group of FPC boards can be electrically connected with the corresponding group of lugs so as to detect and control the electric capacity of the battery cell through the FPC board; the utility model provides an upper cover subassembly needs assemble upper cover plate, two sets of heat insulating part, FPC board and two sets of busbar in advance before assembling the battery module to greatly reduce the material kind of battery module, and simplified the equipment flow of battery module, this battery module has adopted spare part to integrate the design, has greatly reduced the structural complexity, reduces the material number, reduces management and control cost and part cost.

The utility model provides a battery package includes shell, thermal management subassembly and a plurality of battery module, and this battery package's security is higher, and this battery package's production efficiency is high, and then has reduced manufacturing cost.

Drawings

Fig. 1 is a schematic view of a battery module according to the present invention;

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

fig. 3 is a schematic view of an electric core assembly according to the present invention;

fig. 4 is a schematic view of an upper cover assembly and an FPC board according to the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is a partially enlarged view at B in fig. 4.

In the figure:

1. an electrical core assembly; 2. an outer frame main body; 3. an upper cover assembly; 4. heat conducting glue; 5. structural adhesive;

11. an electric core; 12. a tab; 13. a heat insulating buffer; 21. a side plate; 22. a base plate; 23. an end plate; 31. an upper cover plate; 32. a bus bar; 33. a thermal insulation member; 34. an FPC board;

321. a support; 322. a busbar body; 311. positioning holes; 312. a second connection hole;

3211. a positioning column; 3212. a first connection hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element 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 invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a battery pack, and this battery pack includes shell, thermal management subassembly, control assembly and a plurality of battery module, and thermal management subassembly, control assembly and a plurality of battery module all set up in the shell, and the thermal management subassembly is connected with the control assembly electricity, and the thermal management subassembly is used for controlling and adjusts the temperature in the battery pack to make this battery pack be in the best operating condition, the security of this battery pack is higher, and the production efficiency of this battery pack is high, and then has reduced manufacturing cost.

As shown in fig. 1-3, the battery module includes a battery module outer frame and an electric core assembly 1, the electric core assembly 1 is disposed in the battery module outer frame, the electric core assembly 1 includes a plurality of electric cores 11 and a plurality of tabs 12, the plurality of electric cores 11 are stacked, the tabs 12 are disposed at one ends of the electric cores 11, so that the plurality of tabs 12 are disposed in two rows, the battery module outer frame includes an outer frame main body 2 and an upper cover assembly 3, the outer frame main body 2 is provided with a containing groove, and the electric core assembly 1 can be contained in the containing groove; the upper cover assembly 3 comprises an upper cover plate 31, two groups of bus bars 32, two groups of heat insulation pieces 33 and two groups of FPC boards 34, wherein the upper cover plate 31 can be covered on the opening of the accommodating groove; two groups of bus bars 32 are respectively connected to two ends of the upper cover plate 31, when the upper cover plate 31 is covered on the opening of the containing groove, the bus bars 32 can be inserted into the containing groove along the vertical direction (i.e. penetrate out from the length direction of the pole lugs 12) and abut against a corresponding row of pole lugs 12, when the upper cover assembly 3 is installed on the battery module outer frame and the battery module assembly 1 along the vertical direction, because the pole lugs 12 are in a free state, the bus bars 32 cannot generate strong interference with the pole lugs 12, so that the installation of the upper cover assembly 3 is convenient, the assembly of the battery module is easy to operate, and the quality of the battery module is convenient to control; the two groups of heat insulation pieces 33 are arranged on one side of the upper cover plate 31 close to the electric core assembly 1, and the heat insulation pieces 33 are positioned above the corresponding row of tabs 12, so that when thermal runaway occurs at the tabs 12 of the electric core 11, the heat insulation pieces 33 can prevent high-temperature gas from being sprayed upwards, the thermal runaway protection capability of the battery module is enhanced, and the safety of the battery module is improved; the FPC boards 34 are connected to the corresponding set of bus bars 32, and the set of FPC boards 34 can be electrically connected to the corresponding set of tabs 12, so that the capacitance of the battery cell 11 can be detected and controlled through the FPC boards 34; the utility model provides an upper cover subassembly 3 needs assemble upper cover plate 31, two sets of heat insulating part 33, FPC board 34 and two sets of busbar 32 in advance before assembling the battery module to greatly reduce the material kind of battery module, and simplified the equipment flow of battery module, this battery module has adopted the spare part design of integrating, has greatly reduced structural complexity, reduces the material number, reduces management and control cost and part cost.

It should be noted that, when assembling the battery module, the FPC boards 34 are mounted on the corresponding set of the bus bars 32 in advance, and the nickel pieces of the FPC boards 34 are soldered to the bus bars 32.

As shown in fig. 2, the outer frame main body 2 includes two sets of side plates 21, a bottom plate 22 and two sets of end plates 23, the two sets of side plates 21 are spaced and arranged in parallel; the bottom plate 22 is connected with one end of the two groups of side plates 21; two sets of end plates 23 interval sets up, and end plates 23 set up with curb plate 21 and bottom plate 22 are perpendicular to link to each other with curb plate 21 and bottom plate 22 to form the storage tank, this frame main part 2's structure is comparatively simple, the production of being convenient for.

In order to facilitate the two copper bars of the battery module to extend out of the battery module outer frame, the present embodiment provides two notches on one set of the end plates 23 so that the copper bars extend out of the battery module outer frame.

In order to fix the electric core assembly 1 in the outer frame of the battery module, a side surface of the bottom plate 22 close to the electric core assembly 1 is provided with heat conducting glue 4, so that the electric core assembly 1 is bonded and connected with the bottom plate 22, and meanwhile, the heat conducting glue 4 on the bottom plate 22 is also helpful for transferring heat generated by the electric core assembly 1 to the bottom plate 22, so that the heat dissipation of the battery assembly is facilitated; in addition, a side of the upper cover plate 31 close to the cell assembly 1 is provided with a structural adhesive 5, so that the cell assembly 1 is adhesively connected with the upper cover plate 31.

As shown in fig. 3, the battery core assembly 1 is further provided with a plurality of heat insulating buffers 13, each heat insulating buffer 13 is sandwiched between every two battery cells 11, the width of each heat insulating buffer 13 is the same as the width of each battery cell 11, and each heat insulating buffer 13 is made of a heat insulating material and a buffer material in a composite manner, so that each heat insulating buffer 13 has the functions of heat insulation and buffering, so as to prevent two adjacent battery cells 11 from being squeezed, and also prevent heat transfer among the plurality of battery cells 11; preferably, the end of the heat insulation buffer 13 along the length direction thereof is flush with the end of the tab 12 far away from the battery cell 11, and when thermal runaway occurs in a certain battery cell 11, the heat insulation buffer 13 can prevent high-temperature gas generated by the battery cell 11 from being sprayed to the adjacent battery cell 11 from the tab 12, so that the safety of the battery module is improved.

As shown in fig. 4, the bus bar 32 includes a support 321 and a plurality of bus bar main bodies 322, the support 321 is a flat plate structure, the support 321 is connected to the upper cover plate 31, the plurality of bus bar main bodies 322 are arranged at intervals and are all connected to the support 321, so that the bus bar 32 is comb-shaped, and after the bus bar 32 is connected to the upper cover plate 31, the assembly of the battery module is facilitated, in the present embodiment, the bus bar 32 is integrally formed by injection molding, and in other embodiments, the plurality of bus bar main bodies 322 may be connected to the support 321 by a hot riveting process to form the bus bar 32.

As shown in fig. 5 and 6, a plurality of positioning posts 3211 and a plurality of first connection holes 3212 are disposed on the support 321 of the busbar 32, the first connection blocks are threaded holes, a plurality of positioning holes 311 and a plurality of second connection holes 312 are disposed on the upper cover plate 31, the second connection holes 312 are through holes, the positioning posts 3211 can be inserted into the corresponding positioning holes 311 to position the busbar 32 and the upper cover plate 31 for installation, and bolts can pass through the second connection holes 312 to be in threaded connection with the first connection holes 3212 to fix the busbar 32 and the upper cover plate 31; it is conceivable that the bus bar 32 and the upper cover plate 31 can also be riveted through the first connection hole 3212 and the second connection hole 312; in other embodiments, in order to further simplify the process of the upper cover assembly 3, the bus bar 32 and the upper cover 31 may be adhered by glue.

It is conceivable that when the upper cover assembly 3 is mounted on the battery module outer frame and the core assembly 1 in the vertical direction, the plurality of bus bar main bodies 322 of the bus bar 32 are inserted into the corresponding one of the row of tabs 12 in the vertical direction, the bus bar main bodies 322 being inserted between each two tabs 12; after the bus bar main bodies 322 are inserted between every two tabs 12, the tabs 12 are folded to make the tabs 12 abut against the corresponding bus bar main bodies 322, so that the tabs 12 are electrically connected with the bus bar 32 to realize the serial connection or the parallel connection of the battery cells.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The battery module is characterized by comprising a battery module outer frame and an electric core assembly (1), wherein the electric core assembly (1) is arranged in the battery module outer frame, the electric core assembly (1) comprises a plurality of electric cores (11) and a plurality of tabs (12), the electric cores (11) are stacked, the tabs (12) are arranged at one ends of the electric cores (11) so that the tabs (12) are arranged in two rows, the battery module outer frame comprises an outer frame main body (2) and an upper cover assembly (3), the outer frame main body (2) is provided with a containing groove, and the electric core assembly (1) can be contained in the containing groove; the upper cover assembly (3) includes:

the upper cover plate (31), the said upper cover plate (31) can be covered on the opening of the said containing groove;

the two groups of bus bars (32) are respectively connected to two ends of the upper cover plate (31), and the bus bars (32) can be inserted into the accommodating grooves along the vertical direction and are abutted to a corresponding row of the tabs (12);

two groups of heat insulation pieces (33), wherein the two groups of heat insulation pieces (33) are arranged on one side, close to the electric core assembly (1), of the upper cover plate (31), and the heat insulation pieces (33) are positioned above the corresponding row of tabs (12); and

two sets of FPC boards (34), FPC board (34) with correspond a set of busbar (32) link to each other, and a set of FPC board (34) can with correspond one row utmost point ear (12) electricity is connected.

2. The battery module according to claim 1, wherein the bus bar (32) comprises:

the bracket (321) is of a flat plate type structure, and is connected with the upper cover plate (31); and

the bus bar comprises a plurality of bus bar main bodies (322), wherein the bus bar main bodies (32) are arranged at intervals and are connected with the support (321) so that the bus bar (32) is comb-shaped.

3. The battery module according to claim 1, wherein the outer frame main body (2) includes:

the two groups of side plates (21) are arranged at intervals and in parallel;

the bottom plate (22) is connected to one end of each of the two groups of side plates (21); and

two sets of end plate (23), two sets of end plate (23) interval sets up, end plate (23) with curb plate (21) with bottom plate (22) set up perpendicularly, and with curb plate (21) with bottom plate (22) link to each other, in order to form the storage tank.

4. The battery module according to claim 3, wherein a side of the base plate (22) adjacent to the electric core assembly (1) is provided with a thermally conductive adhesive (4) to adhesively connect the electric core assembly (1) to the base plate (22).

5. The battery module according to claim 1, wherein a side of the upper cover plate (31) close to the cell assembly (1) is provided with a structural adhesive (5) to bond the cell assembly (1) and the upper cover plate (31).

6. The battery module according to any one of claims 1 to 5, wherein the cell assembly (1) further comprises:

the battery cell comprises a plurality of heat insulation buffer parts (13), wherein the heat insulation buffer parts (13) are arranged between every two battery cells (11).

7. The battery module according to claim 6, characterized in that the end of the heat insulating buffer (13) in the length direction thereof is flush with the end of the tab (12) remote from the battery cell (11).

8. The battery module according to claim 6, characterized in that the width of the heat insulating buffer (13) is the same as the width of the battery cell (11).

9. A battery pack comprising a housing, a thermal management assembly, and a plurality of battery modules according to any one of claims 1 to 8.