CN218456127U

CN218456127U - Battery module

Info

Publication number: CN218456127U
Application number: CN202222338836.5U
Authority: CN
Inventors: 李大星; 董云鹏; 游小峰
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2023-02-07
Anticipated expiration: 2032-09-02

Abstract

The utility model belongs to the technical field of the battery, a battery module is disclosed. The battery module in this embodiment is through piling up a plurality of electric cores in parallel in the module shell to be provided with the temperature measurement unit on electric core, use CCS subassembly butt in a plurality of electric cores, the CCS subassembly includes the series connection row and the some voltage temperature collection unit of installation on tray and the tray, and the series connection row is established ties a plurality of electric cores, and voltage temperature collection unit can gather and transmit the voltage and the temperature signal of electric core through the electricity connection in the series connection row with the temperature measurement unit. The CCS assembly of integrated form is used to this battery module, is applicable to the battery module of different forms and size, and its simple structure, commonality are stronger to every component is equal batch production, and the equipment of being convenient for is guaranteeing under the high and safe use prerequisite of battery module energy density, can mass production, standardized production, has shortened production cycle and has reduced manufacturing cost.

Description

Battery module

Technical Field

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

Background

The battery module of the square aluminum hull electricity core of new energy automobile on the market at present adopts the standard module of 12 electricity cores mostly, and the defect of this kind of module is that space utilization is not high in the battery system, and the cost of structure is higher, and along with new energy automobile's development, this kind of standard module can't satisfy battery system's high energy density and low-cost requirement, can't adapt to future market.

The existing battery system also comprises long module batteries, and the long module batteries usually comprise at least 20 square aluminum shell battery cores, so that the cost can be saved, and the energy density of the battery system can be improved. Therefore, the profile of the battery module is easily increased, the position deviation degree of the mounting hole is easily increased, and the pretightening force during mounting is too large or too small, so that the use safety of the battery is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module, it has the advantage that the commonality is strong, simple structure and the equipment of being convenient for, under the prerequisite of guaranteeing that energy density is high and safe handling, can reduce production manufacturing cost.

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

the battery module comprises a module shell, a plurality of battery cells and a CCS assembly; a plurality of battery cores are stacked in parallel and arranged in the module shell, and temperature measuring units are arranged on the battery cores; the CCS assembly comprises a tray, a serial row and a voltage and temperature acquisition unit, the bottom surface of the tray is abutted to a plurality of battery cores, the serial row and the voltage and temperature acquisition unit are installed on the tray, the serial row is used for connecting the plurality of battery cores in series, the voltage and temperature acquisition unit is electrically connected to the serial row and the temperature measurement unit respectively, and the voltage and temperature acquisition unit can acquire and transmit voltage and temperature signals of the battery cores.

Optionally, the voltage and temperature acquisition unit includes a flat cable, a connecting sheet and a communication interface, the connecting sheet is fixed on the serial row, the communication interface is fixed on one side of the tray, the flat cable is electrically connected with the temperature measurement unit, the connecting sheet and the communication interface, and the communication interface is used for being connected with external equipment.

Optionally, the voltage and temperature acquisition unit further includes a circuit board, the circuit board is fixedly connected to one side of the tray, the circuit board is electrically connected to the flat cable, and the low-voltage communication interface is mounted on the circuit board.

Optionally, the voltage and temperature acquisition unit further comprises a circuit protection device arranged on one end of the flat cable far away from the temperature measurement unit, and the circuit protection device is mounted on the circuit board.

Optionally, the module shell includes two curb plates that electricity core both sides bonded, is provided with the installed part on the curb plate, and the installed part is used for being connected with external equipment.

Optionally, the CCS assembly further comprises an output row mounted on the tray and electrically connected to the series row.

Optionally, the module housing further includes two end plates disposed opposite to each other in the stacking direction of the plurality of battery cells, and the end plates are provided with mounting portions for accommodating the output bars.

Optionally, an output pole base is detachably connected to the mounting portion, and the output row is mounted on the output pole base.

Optionally, the output electrode base is convexly provided with an installation protrusion and a protruding portion, an installation groove is formed in the inner wall surface of the installation portion, the installation protrusion is installed in a matched mode with the installation groove, and the protruding portion is in interference connection with the inner wall surface of the installation portion.

Optionally, an output electrode protection cover is connected to the output electrode base in a snap-fit manner.

Has the advantages that:

the battery module in this embodiment is through piling up a plurality of electric cores in parallel in the module shell to be provided with the temperature measurement unit on electric core, use CCS subassembly butt in a plurality of electric cores, the CCS subassembly includes the series connection row and the some voltage temperature collection unit of installation on tray and the tray, and the series connection row is established ties a plurality of electric cores, and voltage temperature collection unit can gather and transmit the voltage and the temperature signal of electric core through the electricity connection in the series connection row with the temperature measurement unit. The CCS assembly of integrated form is used to this battery module, is applicable to the battery module of different forms and size, and its simple structure, commonality are stronger to every component is equal batch production, and the equipment of being convenient for is guaranteeing under the high and safe use prerequisite of battery module energy density, can mass production, standardized production, has shortened production cycle and has reduced manufacturing cost.

Drawings

Fig. 1 is an exploded view of a battery module according to an embodiment of the present invention;

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

fig. 3 is an isometric view of a CCS assembly provided by an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is an isometric view of an end plate provided by an embodiment of the present invention;

FIG. 6 is an isometric view of an output pole base provided in accordance with an embodiment of the present invention;

fig. 7 is an isometric view of an output electrode protection cover according to an embodiment of the present invention.

In the figure:

110. a side plate; 111. a mounting member; 112. a side insulating film; 120. an end plate; 121. an installation part; 1211. installing a groove; 122. an output pole base; 1221. mounting a boss; 1222. a boss portion; 1223. a threaded hole; 1224. a fool-proof structure; 1225. mounting holes; 123. an output electrode protection cover; 124. an insulating sheet; 1231. an elastic part; 1232. a fastening part; 130. a cover plate; 131. a reinforcing portion; 140. a base plate;

200. an electric core; 210. a cushion pad;

300. a CCS component; 310. a tray; 320. are arranged in series; 321. arranging wires; 322. connecting sheets; 323. a communication interface; 324. a circuit board; 325. a circuit protection device; 330. an output row; 340. avoiding the 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 "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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.

Referring to fig. 1 and fig. 2, the battery module in the present embodiment includes a module housing, a plurality of battery cells 200, and a CCS assembly 300; a plurality of battery cells 200 are stacked in parallel in the module housing, and a temperature measuring unit (not shown in the figure) is disposed on the battery cells 200; CCS subassembly 300 includes tray 310, series connection row 320 and voltage temperature acquisition unit, and tray 310 bottom surface butt in a plurality of electric cores 200, and series connection row 320 and voltage temperature acquisition unit are all installed on tray 310, and series connection row 320 is used for establishing ties a plurality of electric cores 200, and voltage temperature acquisition unit electricity respectively connects in series connection row 320 and temperature measurement unit, and voltage temperature acquisition unit can gather and transmit the voltage and the temperature signal of electric core 200.

The battery module in this embodiment, through piling up a plurality of electric cores 200 in the module shell in parallel, and be provided with the temperature measurement unit on electric core 200, use CCS subassembly 300 (cell Contact System, integrated female row) butt in a plurality of electric cores 200, CCS subassembly 300 includes series connection row 320 and the some voltage temperature acquisition unit of installation on tray 310 and the tray 310, series connection row 320 connects a plurality of electric cores 200 in series, the voltage temperature acquisition unit can gather and transmit the voltage and the temperature signal of electric core 200 through electrically connecting in series connection row 320 and temperature measurement unit. This battery module uses CCS subassembly 300 of integrated form, is applicable to the battery module of different forms and size, and its simple structure, commonality are stronger to but every component batch production, the equipment of being convenient for under the prerequisite of guaranteeing that battery module energy density is high and safe handling, can batchization, standardized production, shortened production cycle and reduced manufacturing cost.

Referring to fig. 1, the module housing of the present embodiment further includes a cover plate 130, which mainly functions to protect the upper portion of the module, the cover plate 130 is designed with a reinforcing portion 131, and the upper cover is connected to the mating hole of the CCS assembly 300 through a plastic rivet; the material of the cover plate 130 is a plastic material such as PC, PP, PVC, etc., and the embodiment is not particularly limited.

Further, the module housing further includes a bottom plate 140, and the bottom plate 140 in this embodiment is an insulating bottom film, and mainly functions to protect the bottom of the module and adhere to the bottom surface of the battery cell 200 by using a double-sided adhesive tape; the material of the floor is a film material such as PET, PVC, etc., and this embodiment is not particularly limited.

Be provided with insulating piece 124 between end plate 120 and the electric core 200, can make and keep insulating between end plate 120 and the electric core 200, be provided with 90 degrees turn-ups on the insulating piece 124, increase the insulating installation location of end plate 120, insulating piece 124 material is plastic materials such as PC, PP, PVC, and this embodiment does not do specific restriction, can insulate can.

Specifically, be provided with blotter 210 between two adjacent electric cores 200, blotter 210 can absorb electric core 200's inflation energy, reduce the bulging force, blotter 210 is rectangular narrow strip, can resume former shape after the compression, blotter 210 both sides design has the double faced adhesive tape, be used for bonding blotter 210 on the electric core 200 of both sides, the material of blotter 210 can be silica gel pad, XPP, PU, EVA, EPDM, buffer heat insulating materials such as MPP and aerogel pad, the technical staff in the art can select according to specific demands, do not do specific restriction here.

Referring to fig. 3 and 4, the voltage and temperature acquisition unit in the embodiment includes a flat cable 321, a connecting sheet 322, and a communication interface 323, the connecting sheet 322 is fixed on the serial cable 320, the communication interface 323 is fixed on one side of the tray 310, the flat cable 321 is electrically connected to the temperature measurement unit, the connecting sheet 322, and the communication interface 323 is used for connecting with an external device. The Flat Cable 321 in this embodiment is an FFC (Flexible Flat Cable), and a main body portion of the FFC is adhered to the tray 310 by a double-sided tape. FFC is one kind with PET insulating material and extremely thin tin-plated flat copper line, through the novel data cable that high-tech automation equipment production line pressfitting formed, has advantages such as soft, bending at will folding, thickness is thin, small, connect simply, dismantle convenient, easy solution electromagnetic shield. The communication interface 323 can be used to transmit voltage and temperature signals to external devices easily and conveniently. Specifically, the Temperature measuring unit in this embodiment is an NTC (Negative Temperature Coefficient thermistor), and can measure and transmit the Temperature of the case of the battery cell 200 at low cost.

Further, the connecting piece 322 is a nickel piece, and the communication interface 323 is a low-voltage communication connector. The nickel sheet is used for collecting the voltage of the battery cell 200, welding with the series aluminum busbar through laser welding, adding welding spot protective glue on a welding seam, welding the nickel sheet with the FFC, welding the low-voltage communication interface 323 with the circuit board 324 through reflow soldering, and adding hot melt glue for reinforcement.

Further, the voltage and temperature acquisition unit further includes a circuit board 324, the circuit board 324 is fixedly connected to one side of the tray 310, the circuit board 324 is electrically connected to the flat cable 321, and the low voltage communication interface 323 is mounted on the circuit board 324. The Circuit Board 324 in this embodiment is a Printed Circuit Board (PCB), and can provide mechanical support for fixing and assembling various electronic components such as an integrated Circuit, and realize wiring, electrical connection, or electrical insulation between various electronic components such as an integrated Circuit, and provide required electrical characteristics; the automatic detection device can also avoid errors of manual wiring, realize automatic insertion or mounting, automatic tin soldering and automatic detection of electronic components, ensure the quality of electronic products, improve the labor productivity, reduce the cost and facilitate maintenance.

Optionally, the voltage and temperature acquisition unit further includes a circuit protection device 325 disposed on an end of the flat cable 321 away from the temperature measurement unit, and the circuit protection device 325 is mounted on the circuit board 324. The circuit protection device 325 in this embodiment is selected to be a FUSE (FUSE). The circuit protection device 325 can be fused in time when the battery module fails, preventing damage to surrounding electronic equipment.

Further, CCS assembly 300 further includes an output row 330, and output row 330 is mounted on tray 310 and electrically connected to series row 320. The output bar 330 in this embodiment is a copper-aluminum composite bar, which is an output electrode of a module, and is mainly characterized in that the copper bar and the aluminum bar are respectively plated with nickel and are welded together by polymer diffusion welding or ultrasonic welding, the aluminum bar is provided with a hot riveting hole connected with the blister tray 310, the middle part of the aluminum bar is provided with a sunken sink, the copper bar is provided with a mounting hole 1225 and is connected with the output electrode base 122 and the module in series through a bolt, the copper bar is made of T2 red copper, and the aluminum bar is made of AL1060-O.

In this embodiment, the CCS assembly 300 is mainly used for collecting the temperature and voltage of the battery cell 200 of the battery module, connecting the battery cell 200, and conducting the current of the battery module. The tray 310 in this embodiment is a blister tray 310, and mainly functions to support the copper-aluminum composite row and the serial row 320, and provide support strength for the entire CCS assembly 300, and a reinforced matching hole site connected with the upper cover is designed on the tray, the strength of the blister tray 310 can be enhanced by the concave-convex special-shaped structure in the middle part, the avoidance hole 340 provides an avoidance space for airflow emitted by the battery cell 200, a higher insulating wall is designed around the avoidance hole to increase creepage distance for the module, the hot riveting column and the serial row 320 are fixed by a hot riveting process, the blister tray 310 may be made of PC, PVC, PP, and other materials, and this embodiment is not particularly limited; the series connection row 320 in this embodiment is the aluminium row of establishing ties, can pass through laser welding's mode with electric core 200 and be connected, and can conduct the electric current of battery module, the design has the hot riveting hole on it, the hot riveting hole is connected with blister tray 310 through hot riveting technology, the design of series connection aluminium row has the observation hole simultaneously, can observe the welding clearance of aluminium row and electric core 200 utmost point post through the observation hole, it has arched additional strengthening still to design, can alleviate and lead to aluminium row tensile stress because of electric core 200 inflation, the material of series connection aluminium row is AL1060-O.

Referring to fig. 2 and fig. 5, optionally, the module housing includes two side plates 110 bonded to two sides of the battery cell 200, and a mounting member 111 is disposed on the side plates 110, where the mounting member 111 is used for connecting with an external device. Specifically, the mounting member 111 is used to connect with an external device when the mounting side plate 110 is carried, facilitating the mounting and assembling of the mounting side plate 110. The module shell further comprises two end plates 120 which are oppositely arranged along the stacking direction of the plurality of battery cells 200, installation parts 121 used for accommodating the output row 330 are arranged on the end plates 120, and the side plates 110 and the end plates 120 enclose an accommodating cavity which is used for accommodating the battery cells 200. The end plate 120 is mainly used for being welded with the side plate 110, the welding mode can be laser welding, CMT, argon arc welding and the like, and is used for resisting the expansion force of the battery cell 200, the surface of the end plate 120 can be coded by laser engraving modules so as to trace the information of the modules, and the material can be 6 series aluminum profiles or die-casting materials. Side insulating films 112, specifically hot-pressed insulating films, are designed on the upper and lower sides of the side plate 110, so that the insulating resistance between the side plate 110 and the battery cell 200 can be increased, the large plane of the side plate 110 is welded or riveted with an installation part 121, specifically a hanging lug, the hanging lug is provided with a hole for installing a module, and the side plate 110 is bonded with the battery cell 200 through structural adhesive; the material of the side plate 110 is a 5-series or 7-series aluminum alloy material.

Optionally, the output pole base 122 is detachably connected to the mounting portion 121, and the output row 330 is mounted on the output pole base 122. The output pole base 122 is mainly used for embedding nuts and supporting the copper-aluminum composite row on the CCS component 300; the nut is installed in screw hole 1223, the plane of nut exceeds output utmost point base 122 at least 0.3mm, both sides design has higher insulating wall, increase the creepage distance of output utmost point copper aluminium row, the design has mounting hole 1225 and prevents slow-witted structure 1224 on the output utmost point base 122, mounting hole 1225 is used for installing output utmost point visor 123, output utmost point base 122 material is materials such as ABS + PC, ABS and PBT + GF, technical personnel in the art can select according to specific demands, do not do specific restriction here.

As shown in fig. 6, the output electrode base 122 is provided with a mounting protrusion 1221 and a protrusion 1222 in a protruding manner, the inner wall surface of the mounting portion 121 is provided with a mounting groove 1211, the mounting protrusion 1221 is fitted into the mounting groove 1211, and the protrusion 1222 is in interference connection with the inner wall surface of the mounting portion 121. The mounting projections 1221 in this embodiment are dovetail-shaped projections that mate with the dovetail-shaped mounting recesses 1211 of the end plate 120.

With continued reference to fig. 7, optionally, an output electrode protection cover 123 is snap-fit connected to the output electrode base 122. The output electrode protection cover 123 is used for being in snap fit with the output electrode base 122 to protect the copper-aluminum composite row on the CCS assembly 300. The output electrode protection cover 123 is provided with an elastic part 1231, the elastic part 1231 is provided with a buckling part 1232, and the buckling part 1232 can be mutually matched and clamped with the output electrode base 122, and is made of materials such as ABS + PC, ABS and PBT + GF. By pressing the elastic portion 1231, the elastic portion 1231 can be pressed into the mounting hole 1225, the latching portion 1232 is received by the mounting hole 1225, and the output electrode protection cover 123 can be attached to the output electrode base 122.

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 or 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. A battery module, comprising:

a module housing;

the battery module comprises a plurality of battery cells (200), wherein the battery cells (200) are stacked in parallel and arranged in the module shell, and a temperature measuring unit is arranged on each battery cell (200);

the CCS assembly (300) comprises a tray (310), a series connection row (320) and a voltage temperature acquisition unit, wherein the bottom surface of the tray (310) is abutted to the plurality of battery cells (200), the series connection row (320) and the voltage temperature acquisition unit are installed on the tray (310), the series connection row (320) is used for connecting the plurality of battery cells (200) in series, the voltage temperature acquisition unit is respectively and electrically connected to the series connection row (320) and the temperature measurement unit, and the voltage temperature acquisition unit can acquire and transmit voltage and temperature signals of the battery cells (200).

2. The battery module according to claim 1, wherein the voltage and temperature acquisition unit comprises a flat cable (321), a connecting sheet (322) and a communication interface (323), the connecting sheet (322) is fixed on the serial cable (320), the communication interface (323) is fixed on one side of the tray (310), the flat cable (321) is electrically connected with the temperature measurement unit, the connecting sheet (322) and the communication interface (323) respectively, and the communication interface (323) is used for being connected with external equipment.

3. The battery module according to claim 2, wherein the voltage and temperature acquisition unit further comprises a circuit board (324), the circuit board (324) is fixedly connected to one side of the tray (310), the circuit board (324) is electrically connected to the flat cable (321), and the low voltage communication interface (323) is mounted on the circuit board (324).

4. The battery module according to claim 3, wherein the voltage and temperature acquisition unit further comprises a circuit protection device (325) disposed on an end of the flat cable (321) away from the temperature measurement unit, and the circuit protection device (325) is mounted on the circuit board (324).

5. The battery module according to claim 1, wherein the module housing comprises two side plates (110) bonded to two sides of the battery core (200), and a mounting part (111) is arranged on each side plate (110), and the mounting part (111) is used for connecting with external equipment.

6. The battery module according to any of claims 1-5, wherein the CCS assembly (300) further comprises an output row (330), the output row (330) being mounted on the tray (310) and electrically connected to the series row (320).

7. The battery module according to claim 6, wherein the module housing further comprises two end plates (120) oppositely arranged in the stacking direction of the plurality of battery cells (200), and the end plates (120) are provided with mounting portions (121) for accommodating the output row (330).

8. The battery module according to claim 7, wherein an output pole base (122) is detachably connected to the mounting portion (121), and the output row (330) is mounted on the output pole base (122).

9. The battery module according to claim 8, wherein the output electrode base (122) is convexly provided with a mounting protrusion (1221) and a protrusion (1222), the inner wall surface of the mounting portion (121) is provided with a mounting groove (1211), the mounting protrusion (1221) is fitted with the mounting groove (1211), and the protrusion (1222) is in interference connection with the inner wall surface of the mounting portion (121).

10. The battery module according to claim 8, wherein the output electrode base (122) is snap-fitted with an output electrode protection cover (123).