CN218414944U

CN218414944U - CTP battery module

Info

Publication number: CN218414944U
Application number: CN202221455217.8U
Authority: CN
Inventors: 丁坤; 王正伟; 朱华君; 徐勇; 刘建国; 周虎森
Original assignee: Phylion Battery Co Ltd
Current assignee: Phylion Battery Co Ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2023-01-31
Anticipated expiration: 2032-06-10

Abstract

The utility model discloses a CTP battery module, which comprises a bottom plate, a side plate, an end plate and a plurality of square battery cores; the square battery cell comprises a battery cell shell and a pole group positioned in the battery cell shell, wherein a pair of pole lugs of the pole group are respectively arranged on two side surfaces of the battery cell shell; each lug is correspondingly provided with a switching structure, the switching structure comprises an insulating support and a switching metal sheet, one end of the switching metal sheet is electrically connected with the lug, and the other end of the switching metal sheet is bent and extends to the top surface of the cell shell; the insulating support is arranged between the battery cell shell and the switching metal sheet; the switching metal sheets of two adjacent square electric cores are electrically connected through a connecting sheet. The utility model discloses a CTP battery module has solved the battery package equipment degree of difficulty that leads to when square electric core side sets up utmost point ear big, the manufacturing cost is high, the high scheduling problem of defective rate.

Description

CTP battery module

Technical Field

The utility model relates to a lithium cell technical field, concretely relates to CTP battery module.

Background

The lithium ion battery is a secondary battery, and has the advantages of high specific energy, long service life, no memory effect and the like, and is widely applied to the fields of electric automobiles, electric tricycles, electric tools, digital products and the like. Early lithium batteries often adopt a packaging form of "cell-battery Module-battery Pack" (MTP), and heat transfer between modules can be reduced in the event of an accident or a fault, but the space utilization rate of the battery Pack is low, so that improvement of the specific energy of the lithium battery is limited. At present, the CTP packaging method is becoming the mainstream of the battery packaging structure. CTP (Cell-to-Pack, no module power battery package) adopts the bandage to tie fixed a plurality of electric cores to install electric core group in the battery box, need not to set up casing packing electric core from this and form the battery module. Under the prerequisite that electric core safety obtained the assurance, the CTP technique has reduced inside cable and structure, lets the volume energy density and the weight energy density of whole battery package all obtain promoting.

The lithium ion batteries are classified according to shapes and mainly comprise square batteries, cylindrical batteries and soft package batteries. The square battery has the advantages of high packaging reliability, high system energy efficiency, simple structure, relatively convenient capacity expansion and the like, so that the square battery is widely applied to the CTP battery pack. However, the two electrode tabs of the square battery are generally located at the top of the battery cell, but the cost of the battery cell is high due to the arrangement of the electrode tabs. Especially to the great electric core of some width dimensions, if set up utmost point ear in the top of electric core, will lead to the production degree of difficulty big, top cap welding length big, produce electric core deformation scheduling problem, all brought adverse effect to the life-span and the multiplying power of electric core. For such a square battery cell with a large width, companies have to arrange tabs on both sides of the battery cell to overcome the above problems. However, when the battery pack is produced, operations such as welding and wiring need to be performed on the side surface, which not only increases the difficulty of assembling the battery pack, but also increases the manufacturing cost and the probability of defective production of the battery pack.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a CTP battery module, this CTP battery module has solved the battery package that leads to when square electric core side sets up utmost point ear and has assembled the degree of difficulty big, manufacturing cost is high, defective rate scheduling problem.

In order to solve the technical problem, the utility model provides a CTP battery module, include:

the shell consists of a bottom plate and a side plate, and the side plate is fixedly connected with the bottom plate to form an accommodating cavity;

the battery cell module consists of a plurality of square battery cells and is arranged in the accommodating cavity in a certain mode, each square battery cell comprises a battery cell shell and a pole group positioned in the battery cell shell, and a pair of pole lugs of each pole group are respectively arranged on two side surfaces of the battery cell shell; each lug is correspondingly provided with a switching structure, the switching structure comprises an insulating support and a switching metal sheet, one end of the switching metal sheet is electrically connected with the lug, and the other end of the switching metal sheet is bent and extends to the top surface of the cell shell; the insulating support is arranged between the battery cell shell and the switching metal sheet and used for isolating the battery cell shell from the switching metal sheet; the switching metal sheets of two adjacent square battery cells are electrically connected through a connecting sheet, so that the square battery cells are connected together in a series or parallel mode; and

the end plate, the end plate set up in square electric core with between the curb plate, and with the spacing cooperation of electric core module.

In a preferred embodiment, the transition metal sheet is connected to the tab by welding.

In a preferred embodiment, the insulating support is a plastic support.

In a preferred embodiment, the material of the transition metal sheet is nickel.

In a preferred embodiment, two ends of the connecting sheet are fixed on the transfer metal sheets of two adjacent square battery cells in a welding manner.

In a preferred embodiment, two ends of the connecting sheet are fixed on the transition metal sheets of two adjacent square battery cells in a mechanical connection mode.

In a preferred embodiment, among the plurality of square battery cells, part of adjacent square battery cells share the same adapter structure.

In a preferred embodiment, the floor is provided with a plurality of reinforcement beams, which are integrally formed with or welded to the floor.

In a preferred embodiment, an insulating filler is arranged between two adjacent square battery cells.

In a preferred embodiment, the CTP battery module further comprises a thermal management system, wherein the thermal management system is composed of a battery management module, a heating plate, a fluid channel and a plurality of temperature sensors, the battery management module is disposed in the accommodating cavity, the heating plate is disposed on the bottom plate, the fluid channel is disposed in the bottom plate and/or the side plate, a cooling medium is filled in the fluid channel, and the plurality of temperature sensors are used for monitoring the temperature of the cell module in real time; and the battery management module controls the cooling medium to flow to dissipate heat of the battery cell module or controls the heating plate to heat the battery cell module according to the temperature data transmitted by the temperature sensor.

In a preferred embodiment, the CTP battery module further includes a wire harness support, which is installed between the square battery cells and is used for accommodating a wire harness in the battery cell casing.

The utility model has the advantages that:

1. the utility model discloses a CTP battery module adopts the switching structure to draw utmost point ear to electric core top, and switching sheetmetal one end welding is on utmost point ear, and the other end turns over the top of electric core through bending. For the battery cell, the welding size of the side end cover is small, the influence on the battery cell is small, and the quality of the battery cell is more stable. For the production of the battery pack, welding and wiring can be operated on the transfer metal sheet at the top of the battery, so that visual operation of personnel is facilitated, machine operation is facilitated, the manufacturing cost of the battery pack is low, the yield is high, the efficiency is high, and the problems that the assembly difficulty of the battery pack is high, the manufacturing cost is high, the reject ratio is high and the like when lugs are arranged on the side face of a square battery cell are solved.

2. The utility model discloses a CTP battery module's design flexibility ratio is high, and various shapes and size can be made to the switching sheetmetal, are fit for different application scenes. For example, the switching metal sheet can be designed to be connected with other connecting rows through screw locking, and can also be connected with other connecting rows in a welding mode; and a plurality of battery cores can be connected in parallel to share one switching metal sheet so as to be suitable for battery packs with different capacity requirements and the like.

Drawings

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

fig. 2 is a schematic structural diagram of a square battery cell and a switching structure;

fig. 3 is a schematic diagram of the mounting of the transfer structure to a square cell;

FIG. 4 is an enlarged schematic view at A in FIG. 1;

wherein: 1. a base plate; 2. a side plate; 3. an end plate; 4. a square battery cell; 41. a cell shell; 42. a tab; 51. transferring a metal sheet; 52. an insulating support; 6. and (7) connecting the sheets.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a CTP battery module. Specifically, please refer to fig. 1, which is a schematic structural diagram of a CTP battery module according to an embodiment of the present invention. The CTP battery module comprises a bottom plate 1, a side plate 2, an end plate 3 and a plurality of square battery cores 4. The side plates 2 are fixedly connected with the bottom plate 1 to form accommodating cavities, and the square battery cells 4 are arranged in the accommodating cavities in a certain mode; the end plate 5 is arranged between the square battery cell 4 and the side plate 2 and is in spacing fit with the square battery cell 4.

Bottom plate 1 and curb plate 2 all can be the metal sheet, the utility model discloses in, be unlimited to bottom plate 1 and curb plate 2's preparation method. In an embodiment, the bottom plate 1 and the side plate 2 may be prepared by respectively adopting an extrusion molding method, and then the side plate 2 is welded to the bottom plate 1 by a welding method, so that the bottom plate 1 and the side plate 2 enclose an accommodating cavity. In other embodiments, a portion of the bottom panel 1 may be bent to form the side panel 2.

In some embodiments, a plurality of reinforcing beams (not shown) are further disposed on the bottom plate 1, and the reinforcing beams may be integrally formed with the bottom plate 1 or may be metal strips welded to the bottom plate 1. Through setting up the stiffening beam, can strengthen the structural strength of whole battery package frame.

The utility model discloses in, be unlimited to square electric core 4's figure, can confirm the quantity of square electric core in the battery module according to the demand of reality. Can be equally divided into 2 parts, 3 parts or more with square electricity core, then arrange in the holding chamber with certain law, for example can be along the length direction of electric core or the square parallel arrangement of width. In this embodiment, the square battery cell is equally divided into 2 parts, and then the square battery cells are respectively arranged along the length direction. The square battery cell 4 can be fixed on the bottom plate by adopting adhesive bonding or other methods. Insulating and heat-insulating filler can be arranged between two adjacent square battery cores 4 so as to reduce the mutual influence between the square battery cores 4.

The utility model discloses in, end plate 3 both can adopt metal material preparation to form, also can adopt plastic material preparation to form. The end plates 3 are arranged between the side plates 2 and the square battery cores 4, the square battery cores 4 arranged through the pair of end plates 3 are limited, and certain pre-tightening force is provided, so that the square battery cores 4 are clamped and fixed. In some embodiments, a flexible material such as foam can be arranged between the end plate 3 and the square battery cell 4, so that a buffering effect can be provided, and the safety of the battery module is improved.

Referring to fig. 2-3, in the present invention, the square battery cell 4 includes a battery cell casing 41 and a pole group located inside the battery cell casing, wherein a pair of tabs 42 of the pole group are respectively disposed on two side surfaces of the battery cell casing 41. Because the tabs 42 are disposed on the side surface of the cell casing 41, when the battery pack is manufactured and produced by using the square cell, operations such as welding, wiring and the like need to be performed on the side surface, which not only increases the difficulty in assembling the battery pack, but also increases the manufacturing cost and the probability of defective production of the battery pack.

The utility model discloses in, through having increased a switching structure for each utmost point ear 42, solved above-mentioned problem. Referring to fig. 3, the adapting structure includes an insulating support 52 and an adapting metal sheet 51, wherein one end of the adapting metal sheet 51 is electrically connected to the tab 42, and the other end is bent and extended to the top surface of the cell casing 41. The insulating support 52 is disposed between the cell casing 41 and the transition metal sheet 51, and is used for isolating the cell casing 41 from the transition metal sheet 51 and preventing short circuit.

The utility model discloses in, switching sheetmetal 51 accessible welding or other electric connection modes are connected to utmost point ear 42 on to derive the electric current in the electric core. The switching metal sheet 51 can be bent or turned to be extended to any position of the top surface of the battery, and subsequent welding and wiring can be operated on the switching metal sheet on the top of the battery, so that visual operation of workers is facilitated, and influence on the battery core is reduced. The shape of the transition metal piece 51 is not limited, and various shapes and sizes can be made as necessary. Through setting up this kind of switching structure, can increase the design flexibility ratio of battery package, make things convenient for the equipment of follow-up battery, reduced the degree of difficulty of production.

In the present invention, the insulating support 52 can be made of a common insulating material, preferably a plastic support. The transition metal plate 51 may be made of a commonly used metal material, and preferably, a nickel plate.

Referring to fig. 4, in the present invention, the switching metal sheets 51 of two adjacent square battery cells 4 are electrically connected through a connecting sheet 6, so that the plurality of square battery cells 4 are connected in series or in parallel, and thus current can be output outwards together. The two ends of the connecting sheet 6 may be fixed to the switching metal sheets 51 of the two adjacent square battery cells 4 by welding, or may be fixed to the switching metal sheets 51 of the two adjacent square battery cells 4 by screwing.

In some embodiments, some adjacent square battery cells 4 in the plurality of square battery cells 4 share the same adapter structure or only share the same adapter metal sheet 51 in parallel, so that the battery pack can be suitable for battery packs with different capacity requirements.

The utility model discloses an among the CTP battery module, still include thermal management system (not shown), thermal management system comprises battery management module, hot plate, fluid passage and a plurality of temperature sensor, and wherein, battery management module sets up in the holding intracavity, and the hot plate sets up on the bottom plate, and fluid passage sets up in bottom plate and/or curb plate, has filled coolant in it. The plurality of temperature sensors are used for monitoring the temperature of the battery cell module in real time. The battery management module can control the flow of a cooling medium according to the temperature data transmitted by the temperature sensor, so that the battery core module is cooled; or the heating plate is controlled to heat the battery cell module. Through setting up thermal management system, can guarantee that electric core is in the operating temperature interval of preferred all the time, reduce safe implication, guarantee the output of battery.

The utility model discloses an among the CTP battery module, still include wire harness support, wire harness support mounting is between square electricity core for accept various pencil in the casing, reduce the quantity of spare part in the battery module, make battery module inner structure compacter, practiced thrift the valuable space.

To sum up, the utility model provides a CTP battery module has solved the battery package equipment degree of difficulty that leads to when square electricity core side sets up utmost point ear through setting up of switching structure big, the manufacturing cost is high, the high scheduling problem of defective rate. The CTP battery module has high design flexibility, and the transfer metal sheet can be made into various shapes and sizes and is suitable for different application scenes; in addition, several battery cores are connected in parallel and share one switching metal sheet, so that the battery pack can be suitable for battery packs with different capacity requirements.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitution or transformation made by the technical personnel in the technical field on the basis of the utility model is within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A CTP battery module, comprising:

the battery cell module consists of a plurality of square battery cells and is arranged in the accommodating cavity in a certain mode, each square battery cell comprises a battery cell shell and a pole group positioned in the battery cell shell, and a pair of pole lugs of each pole group are respectively arranged on two side surfaces of the battery cell shell; each lug is correspondingly provided with a switching structure, the switching structure comprises an insulating support and a switching metal sheet, one end of the switching metal sheet is electrically connected with the lug, and the other end of the switching metal sheet is bent and extends to the top surface of the cell shell; the insulating support is arranged between the battery cell shell and the switching metal sheet and is used for isolating the battery cell shell from the switching metal sheet; the switching metal sheets of two adjacent square battery cells are electrically connected through a connecting sheet, so that the square battery cells are connected together in a series or parallel mode; and

the end plate is arranged between the square battery cell and the side plate and is in spacing fit with the battery cell module.

2. The CTP battery module according to claim 1, wherein said transition metal sheet is connected to said tabs by welding.

3. The CTP battery module according to claim 1, wherein the insulating support is a plastic support, and the adapting metal sheet is made of nickel.

4. The CTP battery module according to claim 1, wherein two ends of the connecting sheet are fixed to the transition metal sheets of two adjacent square battery cells by welding or mechanical connection.

5. The CTP battery module according to claim 1, wherein some adjacent square cells in the plurality of square cells share the same adapting structure.

6. The CTP battery module according to claim 1, wherein said bottom plate is integrally formed with a side plate, or said side plate is fixed to said bottom plate by welding.

7. The CTP battery module according to claim 1, wherein a plurality of reinforcing beams are provided on said base plate, said reinforcing beams being integrally formed with or welded to said base plate.

8. The CTP battery module according to claim 1, wherein an insulating filler is disposed between two adjacent square cells.

9. The CTP battery module according to claim 1, further comprising a thermal management system, wherein the thermal management system is composed of a battery management module, a heating plate, a fluid channel and a plurality of temperature sensors, wherein the battery management module is disposed in the receiving cavity, the heating plate is disposed on the bottom plate, the fluid channel is disposed in the bottom plate and/or the side plate, a cooling medium is filled therein, and the plurality of temperature sensors are used for monitoring the temperature of the cell module in real time; and the battery management module controls the cooling medium to flow to dissipate heat of the battery cell module or controls the heating plate to heat the battery cell module according to the temperature data transmitted by the temperature sensor.

10. The CTP battery module according to claim 9, further comprising a harness support mounted between the square cells for receiving a harness within the housing.