CN115602979A

CN115602979A - Soft package battery module and manufacturing method thereof

Info

Publication number: CN115602979A
Application number: CN202110721373.8A
Authority: CN
Inventors: 许祎凡; 张朋; 娄豫皖; 孟祎凡; 李紫璇
Original assignee: Shanghai Binei Information Technology Co ltd
Current assignee: Anhui Wenzeng Power New Energy Technology Co.,Ltd.
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2023-01-13

Abstract

The application relates to a soft package battery module and a manufacturing method thereof, and belongs to the technical field of power batteries. Laminate polymer battery module includes: the battery pack comprises an upper cover, a module formed by connecting soft-package batteries in series, an aluminum cylinder and a base, wherein the soft-package batteries are single batteries with tabs, and the aluminum cylinder and the base are connected together in an installing manner; the module after laminate polymer battery establishes ties is located an aluminium section of thick bamboo, and the module after laminate polymer battery establishes ties links to each other with the upper cover, and the upper cover is in the same place with an aluminium section of thick bamboo locking. The accessory of this application laminate polymer battery module is few, and is with low costs. The lugs of the single battery are distributed at two ends, and each end is respectively provided with two lugs for output, so that the current of the battery is uniformly distributed, the internal resistance is low, and the heat generation is small. The module transfers heat to the aluminum cylinder through the positive and negative electrode lugs, and the heat transfer efficiency is high. The high-density hard foaming material on-site foaming fixing module is simple and reliable, light in weight and low in cost. The aluminum partition plate arranged in the middle of the aluminum cylinder is arranged in the middle of the 2 modules and directly connected with the heat-conducting fins on the surfaces of the lugs, heat inside the modules is conducted to the aluminum plate, and the heat transfer efficiency is high.

Description

Soft package battery module and manufacturing method thereof

Technical Field

The application relates to a soft package battery module and a manufacturing method thereof, in particular to a battery module assembled by a soft package battery and a manufacturing method thereof, and belongs to the technical field of power batteries.

Background

Compared with other batteries, the soft package power battery has the characteristics of high energy density, low cost and long service life. But laminate polymer battery module also has the accessory many simultaneously, the inefficiency in groups, with high costs, radiating effect subalternation problem.

In the prior art, for example, patents CN111933852A, CN212625856U, CN112670635A, CN111969154A, CN212625870U, etc., generally include a housing, a housing main body, an upper cover, a rear cover, a bottom plate, a side plate, a copper bar assembly, a plastic support, a guide groove, a plastic protection cover, a circuit board, a plug connector, a buffer pad, a heat conducting sheet plastic cover plate, etc., and the number of accessories is tens, the number of processes is many, the grouping efficiency is low, and the cost is high.

Disclosure of Invention

Consequently, this application has designed a laminate polymer battery module, adopts the thinking of utmost point ear heat conduction, combines special design's aluminum hull, realizes laminate polymer battery module's assembly, heat dissipation and fixed. Aiming at the defects of the prior art, the soft package single battery with lugs at two ends and the square aluminum shell with an aluminum plate (aluminum baffle) inserted in the middle are adopted, and two sides of a battery stack are fixed by high-density hard foaming materials. The module has the advantages of simple structure, high heat dissipation efficiency, few processes, low cost and high reliability.

The application provides a laminate polymer battery module, include: the battery pack comprises an upper cover, a module formed by connecting soft-package batteries in series, an aluminum cylinder and a base, wherein the soft-package batteries are single batteries with tabs, and the aluminum cylinder and the base are connected together in an installing manner; the module after the laminate polymer battery establishes ties is located an aluminium section of thick bamboo, and the module after the laminate polymer battery establishes ties links to each other with the protection shield and the output socket of upper cover, and the upper cover is in the same place with the locking of an aluminium section of thick bamboo.

Further, among the above-mentioned laminate polymer battery module, an aluminium section of thick bamboo includes an aluminium section of thick bamboo shell and aluminium baffle, and the inboard middle part of an aluminium section of thick bamboo shell is equipped with inlays the open structure who inserts the aluminium baffle.

Further, the module after the soft package batteries are connected in series is a 10S module after 10 soft package batteries are connected in series, and the aluminum cylinder and the base are connected together through bolts; 2 10S modules are respectively inserted into the aluminum cylinder, the total positive and total negative of the 10S modules are connected with the output and input socket of the upper cover and the protection board by power lines, the acquisition wire harness of the 10S modules is connected with the protection board, and the upper cover is locked with the aluminum cylinder by bolts.

Furthermore, the 10S module surface has two A faces, two B faces and two C faces, wherein the A face is used for the utmost point ear of battery cell to draw forth and weld, the B face is used for bonding fixed of battery cell, the C face is used for the anti inflation curb plate of installation, when the 10S module is located the aluminium section of thick bamboo, the A face directly contacts with aluminium section of thick bamboo casing, the B face corresponds base and upper cover, one side of C face and casing contact, the one side and the contact of middle aluminium baffle.

Further, the 10S module consists of 3 2S modules, 1 2S total positive module, 1 2S total negative module, a collecting wire harness, 2 lug heat-conducting insulation plates, 2 foaming filling plates and 2 packing belts; the 10S module is provided with a negative electrode total output and a positive electrode total output, a tab series connection point of the 10S module, and a voltage and temperature acquisition wire harness is welded at the total positive/negative position.

Further, 2 side plates are placed on two surfaces C of the 10S module and are packaged and fixed by a packaging belt; two A surfaces of the 10S module are adhered with heat-conducting insulating sheets; the two B surfaces of the 10S die set are filled with high-density hard foaming materials.

Furthermore, the 2S module is formed by fixing lugs by 2 single batteries through 2 lug clamps and then performing series welding; the 2S total positive module is formed by fixing lugs of 2 single batteries through 2 lug clamps, welding a positive/negative lug at one end in series, and welding a positive lug and a positive total output at one end; the 2S total negative module is formed by fixing tabs of 2 single batteries through 2 tab clamps, welding positive/negative tabs at one end in series, and welding negative tabs at one end with a negative electrode total output.

Furthermore, a positive electrode lug and a negative electrode lug are led out from two ends of the single battery, 2 lugs are distributed at each end, and the two lugs have the same polarity or opposite polarities.

The application also provides a manufacturing method of the soft package battery module, which comprises the following steps: the aluminum cylinder is connected with the base through bolts; inserting a module formed by connecting soft-package batteries in series into an aluminum cylinder, connecting the total positive and the total negative of the module formed by connecting the soft-package batteries in series with an output and input socket and a protection plate of an upper cover by using power lines, and inserting an acquisition wire harness of the module formed by connecting the soft-package batteries in series into the protection plate; and after the connection is finished, the upper cover and the aluminum cylinder are locked by bolts.

Further, the method specifically comprises the following steps:

(1) The base and the aluminum cylinder are locked through the sealant and the bolts, and the middle aluminum partition plate is inserted into the aluminum cylinder;

(2) Manufacturing a 2S module, stacking 2 single battery cells, placing two ends of a lug into a lug clamp, and welding a lug at one end;

(3) Manufacturing a 2S total positive module, stacking 2 single battery cells, placing two ends of a tab into a tab clamp, and welding a tab at one end; the other end of the anode is welded with anode total output;

(4) Manufacturing a 2S total negative module, stacking 2 single battery cells, placing two ends of a lug into a lug clamp, and welding a lug at one end; the negative electrode at the other end is welded with the negative electrode total output;

(5) Manufacturing a 10S module, stacking 1 2S total negative module, 3 2S modules and 1 total positive 2S module in sequence, welding an acquisition wiring harness, placing 2 side plates on a surface C, packaging a belt, installing 2 lug heat-conducting insulation sheets on a surface A, and filling foam adhesive on a surface B;

(6) 2 10S modules are arranged in an aluminum cylinder, an acquisition wiring harness is connected to an upper cover protection plate, and a total positive and a total negative are connected to the protection plate and an upper cover socket;

(7) The upper cover and the aluminum cylinder are locked through the sealing glue and the bolts.

The application has the following technical effects and advantages:

1. compare with the soft packet of module of tradition, the accessory is few, and is with low costs.

2. The lugs of the single batteries are distributed at two ends, and each end is respectively provided with two lugs for output, the current of the batteries is uniformly distributed, the internal resistance is low, and the heat generation is small.

3. The module transfers heat to the aluminum cylinder through the anode and cathode lugs, and the heat transfer efficiency is high.

4. The high-density hard foaming material on-site foaming fixing module is simple and reliable, light in weight and low in cost.

5. The aluminium baffle that sets up in the middle of the aluminium section of thick bamboo is in the middle of 2 10S modules, and directly meets with the aluminium section of thick bamboo, can be to the inside heat conduction of module on aluminum plate, and heat transfer efficiency is high.

Drawings

Fig. 1 is a general exploded view of a battery pack according to the present invention.

Fig. 2 is an exploded view of a 10S module of the battery pack according to the present invention.

Fig. 3 is a 10S module isometric view of a battery pack of the present invention.

Fig. 4 is an exploded view of a 2S total negative (positive) module of the battery pack of the present invention.

Fig. 5 is a 2S total negative (positive) module isometric view of a battery pack of the present invention.

Fig. 6 is an exploded view of a 2S module of a battery pack according to the present invention.

Fig. 7 is a 2S module isometric view of a battery pack of the present invention.

Fig. 8 is a schematic view of the battery pack of the present invention with a 10S module inserted into the case.

Fig. 9 (1) and 9 (2) are schematic diagrams illustrating the combination of the aluminum can and the intermediate insertion plate of the battery pack of the present invention, wherein fig. 9 (1) is a partial enlarged view of fig. 9 (2) at I.

Fig. 10 is a schematic diagram of a battery cell in one of two different tab outlet manners of the battery pack according to the present invention.

Fig. 11 is a schematic diagram of cells of another mode of two different tab outlet modes of the battery pack according to the present invention.

Fig. 12 is a schematic view of a 2S tab clamp of a battery pack of the present invention.

Fig. 13 is a diagram illustrating a definition of a 10S module plane of a battery pack according to the present invention.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

In the figure, 1 is an upper cover, 2 is a 10S module, 3 is an aluminum cylinder, and 4 is a base; 21 is a 2S total negative module, 22 is a 2S module, 23 is a 2S total positive module, 24 is a side plate, 25 is a collecting wire harness, 26 is a packing belt, 27 is a foaming filling plate, 28 is a lug heat-conducting insulation sheet, 211 is a negative total output, 231 is a positive total output, 221 is an electric core, 222 is a lug clamp, 2211 is a positive lug, and 2212 is a negative lug; 31 is an aluminum cylinder shell, 32 is a middle clapboard, and 33 is a middle plugboard clamping groove.

As shown in the figure, the technical scheme of this application is a laminate polymer battery module, and its leading features includes: the battery pack comprises an upper cover 1, a module (10S module) 2 formed by connecting 10 soft-package batteries in series, an aluminum cylinder 3 and a base 4. The aluminum cylinder 3 is connected with the base 4 by screws (bolts); 2 10S modules are respectively inserted into the aluminum barrel 3, the total positive and total negative of the 10S modules are connected with an output and input socket and a protection plate of the upper cover 1 by power lines, and the collection wire harness of the 10S module is inserted into the protection plate; after the connection is completed, the upper cover and the aluminum cylinder are locked by screws (bolts).

The aluminum tube 3 comprises an aluminum tube shell 31 and an aluminum partition plate 32, and an opening structure 33 inserted with the aluminum partition plate 32 is arranged in the middle of the aluminum tube shell 31.

The aluminum cylinder shell is connected with the base in a sealing mode through a sealing ring and a bolt.

A protection board, an outlet, and an inlet (not shown) are mounted on the upper cover 1.

The upper cap 1 is mounted to the upper end of the aluminum cylinder 3 by means of a sealant and bolts.

The surface of the 10S module 2 is provided with two surfaces A, two surfaces B and two surfaces C, wherein the surface A is used for leading out and welding the pole lugs of the single battery 221, the surface B is used for bonding and fixing the single battery, and the surface C is used for installing the anti-expansion side plate 24.

When the 10S module 2 is placed into the shell, the surface A is directly contacted with the shell, the surface B corresponds to the base and the upper cover, one surface C is contacted with the shell, and the other surface C is contacted with the middle aluminum partition plate.

The 10S module 2 is composed of 3

2S modules

22, 1 total positive 2S module 23, 1 total negative 2S module 21, a collecting

harness

25, 2 tab heat-conducting

insulating plates

28, 2

foaming filling plates

27, and 2 packing belts 26.

The 10S module is provided with a negative total output 211 and a positive total output 231. And a voltage and temperature acquisition wire harness 25 is welded at a tab series point and a total positive/negative position of the 10S module.

2 side plates 24 are placed on two surfaces C of the 10S module and are packaged and fixed by a packaging belt.

Two A surfaces of the 10S module are pasted with heat-conducting insulation sheets 28.

The two B surfaces of the 10S die set are filled with high-density hard foaming materials.

The 2S module 22 is formed by fixing tabs by 2 unit batteries 221 through 2 tab clamps 31 and then performing series welding.

The 2S total positive module 23 is formed by fixing tabs by 2 unit batteries 221 through 2 tab clamps 31, welding positive/negative tabs in series at one end, and welding the positive tabs and a positive total output 231 at one end.

The 2S total negative module 21 is formed by fixing tabs of 2 single batteries 221 through 2 tab clamps 31, welding positive/negative tabs at one end in series, and welding negative tabs and a negative total output 211 at one end.

The positive tab 2211 and the negative tab 2212 are led out from two ends of the single battery 221, each end is distributed with 2 tabs, and the two tabs may have the same polarity or opposite polarities.

The manufacturing method of the battery module comprises the following steps:

(1) The base and the aluminum cylinder are locked through a sealant and a bolt, and a middle aluminum partition plate is inserted into the aluminum cylinder;

(3) Manufacturing a 2S total positive module, stacking 2 single battery cells, placing two ends of a lug into a lug clamp, and welding a lug at one end; the other end of the anode is welded with anode total output;

(4) Manufacturing a 2S total negative module, stacking 2 single battery cells, placing two ends of a tab into a tab clamp, and welding a tab at one end; the negative electrode at the other end is welded with the negative electrode total output;

(5) Manufacturing a 10S module, stacking 1 2S total negative module, 3 2S modules and 1 total positive 2S module in sequence, welding an acquisition wire harness, placing 2 side plates on a surface C, packaging a packaging belt, installing 2 lug heat-conducting insulation sheets on a surface A, and filling foam adhesive on a surface B;

(6) 2 10S modules are arranged in an aluminum cylinder, an acquisition wire harness is connected to an upper cover protection plate, and a main positive module and a main negative module are connected to the protection plate and an upper cover socket;

Example 1 (FIG. 1)

The aluminum cylinder 3 comprises an aluminum cylinder shell 31 and an aluminum partition plate 32, and an opening structure 33 for inserting the aluminum plate 32 is arranged in the middle of the aluminum cylinder shell 31.

A protection plate (not shown) is mounted in the upper cover.

And the aluminum cylinder shell is hermetically connected with the base through a sealing ring and a bolt.

The surface of the module is provided with two surfaces A, two surfaces B and two surfaces C, wherein the surface A is used for leading out and welding the pole lugs of the single batteries 221, the surface B is used for bonding and fixing the single batteries, and the surface C is used for installing the anti-expansion side plate 24.

The single battery 221 fixes the tab through the tab fixture 31, and then performs series welding to form a 2S module, and the 2S modules are sequentially connected in series to form a 10S module, wherein the 10S module is provided with a negative total output 211 and a positive total output 231.

And foaming and fixing the two B surfaces of the module by using a high-density hard foaming material.

A voltage and temperature acquisition harness 25 is connected.

Side plates 24 are attached to both C-faces of the 10S module 2 and fixed with a packing belt 26.

And heat-conducting insulation sheets are attached to the two A surfaces of the 10S module 2.

2 10S modules are arranged in an aluminum cylinder shell, and then an aluminum clapboard 32 is inserted into a clamping groove 33 in the middle of the aluminum cylinder shell.

The positive and negative cables of the two 10S modules are connected in series or in parallel and led out by current output terminals (not shown).

The protection plate in the upper cover is connected with the collection wire harness 25 and the current output terminal.

The upper cover is arranged at the upper end of the aluminum cylinder through a sealing ring and a bolt.

Example 2

As shown in fig. 11, a positive tab 2211 and a negative tab 2212 are led out from two ends of the 30Ah soft-package lithium iron phosphate

single battery

222, and 2 tabs with different polarities are distributed at each end. The rest is the same as example 1.

Example 3

The positive and negative cables of the two 10S modules are connected in parallel and led out by current output terminals (not shown). Thus, a 10S 32V60Ah pouch battery module was formed. The rest is the same as example 1.

Through the laminate polymer battery module contrast test with among the prior art, can discover, laminate polymer battery module simple structure in the above-mentioned embodiment of this application, the radiating efficiency is high, and the process is few, with low costs, the reliability is high.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.

Claims

1. The utility model provides a laminate polymer battery module which characterized in that includes: the battery pack comprises an upper cover, a module formed by connecting soft-package batteries in series, an aluminum cylinder and a base, wherein the soft-package batteries are single batteries with tabs, and the aluminum cylinder and the base are connected together in an installing manner; the module after the laminate polymer battery establishes ties is located an aluminium section of thick bamboo, and the module after the laminate polymer battery establishes ties links to each other with the protection shield and the output socket of upper cover, and the upper cover is in the same place with the locking of an aluminium section of thick bamboo.

2. The soft package battery module according to claim 1, wherein the aluminum can comprises an aluminum can shell and an aluminum partition plate, and an opening structure for inserting the aluminum partition plate is arranged in the middle of the aluminum can shell.

3. The soft package battery module according to claim 1 or 2, wherein the module formed by connecting soft package batteries in series is a 10S module formed by connecting 10 soft package batteries in series, and the aluminum cylinder and the base are connected together through a bolt; 2 10S modules are respectively inserted into the aluminum cylinder, the total positive and total negative of the 10S modules are connected with the output and input socket of the upper cover and the protective plate by power lines, the collection wire harness of the 10S modules is connected with the protective plate, and the upper cover and the aluminum cylinder are locked together by bolts.

4. The soft package battery module according to claim 3, wherein the 10S module has two A surfaces for leading out and welding the electrode tabs of the single batteries, two B surfaces for bonding and fixing the single batteries, and two C surfaces for installing the anti-expansion side plates, when the 10S module is located in the aluminum tube, the A surfaces are directly contacted with the shell of the aluminum tube, the B surfaces correspond to the base and the upper cover, the C surfaces are contacted with the shell, and the C surfaces are contacted with the middle aluminum partition plate.

5. The laminate polymer battery module of claim 4, wherein the 10S module comprises 3 2S modules, 1 2S total positive module, 1 2S total negative module, a collection wire harness, 2 tab heat-conducting insulation plates, 2 foam filling plates, and 2 packing belts; and a negative electrode total output and a positive electrode total output are arranged on the 10S module, tab series points of the 10S module are arranged, and voltage and temperature acquisition wire harnesses are welded at the total positive/negative positions.

6. The soft package battery module of claim 5, wherein 2 side plates are placed on two C surfaces of the 10S module and are packed and fixed by a packing belt; two A surfaces of the 10S module are adhered with heat-conducting insulating sheets; the two B surfaces of the 10S die set are filled with high-density hard foaming materials.

7. The soft package battery module according to claim 6, wherein the 2S module is formed by fixing tabs of 2 single batteries through 2 tab clamps and then performing series welding; the 2S total positive module is formed by fixing tabs of 2 single batteries through 2 tab clamps, welding positive/negative tabs at one end in series, welding the positive tabs at one end and outputting positive electrode at the other end; the 2S total negative module is formed by fixing tabs of 2 single batteries through 2 tab clamps, welding positive/negative tabs at one end in series, and welding negative tabs at one end with a negative electrode total output.

8. The soft package battery module according to claim 7, characterized in that positive electrode tabs and negative electrode tabs are led out from two ends of the single battery, 2 tabs are distributed at each end, and the two tabs have the same polarity or opposite polarities.

9. The manufacturing method of the soft package battery module is characterized by comprising the following steps: the aluminum cylinder is connected with the base through bolts; inserting a module formed by connecting soft-package batteries in series into an aluminum cylinder, connecting the total positive and the total negative of the module formed by connecting the soft-package batteries in series with an output and input socket and a protection plate of an upper cover by using power lines, and inserting an acquisition wire harness of the module formed by connecting the soft-package batteries in series into the protection plate; and after the connection is finished, the upper cover and the aluminum cylinder are locked by bolts.

10. The manufacturing method according to claim 9, comprising the steps of:

(2) Manufacturing a 2S module, stacking 2 single battery cells, placing two ends of a tab into a tab clamp,

welding a tab at one end;

(7) The upper cover and the aluminum cylinder are locked through sealing glue and bolts.