CN112864510A - Soft package battery pack - Google Patents
Soft package battery pack Download PDFInfo
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- CN112864510A CN112864510A CN202110440093.XA CN202110440093A CN112864510A CN 112864510 A CN112864510 A CN 112864510A CN 202110440093 A CN202110440093 A CN 202110440093A CN 112864510 A CN112864510 A CN 112864510A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a soft package battery pack, and relates to the technical field of batteries. The soft package battery thermal management system comprises a soft package battery, an outer frame and a thermal management system; outer frame forms the inner space, laminate polymer battery is parallel vertical to be set up in the inner space that outer frame formed, laminate polymer battery's length direction with the width direction of battery package is unanimous laminate polymer battery's width direction with the direction of height of laminate polymer battery package is unanimous just laminate polymer battery's thickness direction with the length direction of laminate polymer battery package is unanimous. The invention provides a soft-package battery pack, which can improve the volume utilization rate in the battery pack.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a soft package battery pack.
Background
Recently, the frequency of battery CTP is higher and higher, and the battery CTP gradually enters the field of view of the public. CTP is Cell to PACK, is that electric core direct integration is for the battery package to middle module link has been saved. The CTP has two technical routes, namely, a completely module-free mode is adopted, and a mode of replacing a small module with a large module is adopted. However, the current soft package CTP scheme is still immature, and no implementation scheme for soft package CTP exists.
On the other hand, the lugs of the conventional soft package battery are all provided with lugs from two sides or the same side of the battery cell, and when the lugs are provided with lugs from the same side of the module, certain space waste exists in the middle positions of the two lugs, so that the volume utilization rate of the large-module soft package battery cell is reduced; when the utmost point ear is gone out from the module both sides, there is certain space extravagant in the both sides of each utmost point ear, leads to having reduced the volume utilization ratio of big module laminate polymer battery core. Therefore, a new pouch battery structure is needed to solve the problem.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention mainly aims to provide a soft-package battery pack which can improve the volume utilization rate in the battery pack.
In order to achieve the purpose, the invention provides a soft package battery pack, which comprises a soft package battery, an outer frame and a thermal management system; the outer frame forms an inner space, the soft-package battery is vertically arranged in the inner space formed by the outer frame in parallel, the length direction of the soft-package battery is consistent with the width direction of the soft-package battery pack, the width direction of the soft-package battery is consistent with the height direction of the soft-package battery pack, and the thickness direction of the soft-package battery is consistent with the length direction of the soft-package battery pack;
the soft package battery comprises a pole piece, the pole piece comprises a first battery cell and a second battery cell, the first battery cell comprises a first battery cell body, a first pole lug and a second pole lug, and the first pole lug and the second pole lug are positioned on the same side face of the first battery cell body; the second battery cell comprises a second battery cell body, and the second battery cell is arranged between the first pole lug and the second pole lug and is connected with the first battery cell.
The first cell has a first length L1, a first height H1, and a first width D1, the second cell has a second length L2, a second height H2, and a second width D2, and the first and second tabs have a height H; the first tab and the second tab are positioned in a side face formed by a first length L1 and a first width D1, wherein L1 is more than or equal to H1, and L1 is more than or equal to D1;
the ratio of the first length L1 to the first height H1 of the first cell ranges from 4 to 50;
the ratio of the first length L1 to the first width D1 of the first cell ranges from 20 to 210.
Optionally, the first length L1 of the first battery cell ranges from 400mm to 1500 mm.
Optionally, the distance between the first tab and the second tab is d, and the ratio of d to L1 ranges from 0.7 to 0.9.
Alternatively, the ratio of L2 to d ranges from 0.7 to 0.9.
Optionally, the thermal management system comprises a cooling module, a cooling medium circulation tube comprising an inlet tube and an outlet tube, the inlet tube and the outlet tube being connected to the cooling module, respectively.
Optionally, the inlet pipe and the outlet pipe are disposed on a cooling assembly located at a wide side of the pouch battery pack.
Optionally, the cooling assembly is positioned between the first and second tabs, the cooling assembly having a width D3, a ratio of D3 to D ranging from 0.7 to 0.9.
Alternatively, the ratio of D3 to D ranges from 0.75 to 0.85.
Optionally, the pouch battery pack further comprises an electrical connection plate, and the electrical connection plate is disposed above the pouch battery; the electric connection plate comprises a frame and lug slots, a first lug and a second lug penetrate through the lug slots of the electric connection plate, and the first lug and the second lug are fixed and electrically connected with the electric connection plate respectively.
Optionally, the positive electrode tab and the negative electrode tab of adjacent soft package batteries are connected through an electric connection plate to form a series connection; lie in laminate polymer battery package with one side, any laminate polymer battery's positive pole and adjacent laminate polymer battery's negative pole connect in same the electricity link plate.
The invention provides a soft-package battery pack which comprises a soft-package battery, an outer frame and a thermal management system; according to laminate polymer battery's characteristics, through setting up first utmost point ear and second utmost point ear on same side of first electric core body to set up second electric core between first utmost point ear and second utmost point ear, make first electric core and second electric core be "protruding" font, avoid the space waste between first utmost point ear and the second utmost point ear, improved the volume utilization in the laminate polymer battery package.
The soft package battery pack provided by the invention has the advantages of high volume utilization rate, simple structure and low cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pouch battery pack provided by the invention;
fig. 2 is a schematic top view of the pouch battery pack of fig. 1;
fig. 3 is a schematic structural diagram of a pole piece of the pouch battery pack according to fig. 1;
fig. 4 is a schematic structural view of a pouch cell according to the pouch cell pack shown in fig. 1;
fig. 5 is a schematic structural view of the pouch battery shown in fig. 4;
fig. 6 is a schematic structural view of the pouch battery shown in fig. 4;
fig. 7 is a schematic structural view of a pouch battery pack (with the thermal management system disassembled) according to fig. 1;
fig. 8 is a partially enlarged schematic view of a pouch battery pack according to fig. 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 3 to 6, the present invention provides a pouch battery 1, where the pouch battery 1 may include a pole piece 11, and the pole piece 11 includes a first cell 12 and a second cell 13. The first cell 12 includes a first cell body 121, a first tab 122, and a second tab 123. The first tab 122 and the second tab 123 are located on the same side of the first cell body 121. The second cell 13 includes a second cell body (the second cell body has the same structure as the first cell body 121, and the second cell body and the first cell body 121 are of an integral structure, that is, the second cell body and the first cell body 121 together form a cell body, or both of them may be of a split design and are electrically connected to form a cell body), and the second cell 13 is disposed between the first tab 122 and the second tab 123 and connected to the first cell 12 to form a positive electrode or a negative electrode of the pouch battery. And a second battery cell 13 is arranged on the side of the pouch battery between the first tab 122 and the second tab 123. The second cell 13 is electrically connected to the first cell 12. Namely, through set up the second electricity core between first utmost point ear 122 and second utmost point ear 123 for first electricity core 12 and second electricity core 13 are whole to be "protruding" font structure, have avoided the space waste between two utmost point ears, thereby have improved the volume utilization in the laminate polymer battery package.
Specifically, to improve the volume utilization rate in the pouch battery pack, the shape of the battery cell is generally designed to be adapted to the shape of the housing of the pouch battery pack, which is generally rectangular. As shown in fig. 3-6, the first cell 12 and the second cell 13 are each rectangular parallelepiped in shape, and the first cell 12 has a first length L1, a first height H1, and a first width D1. The second cell 13 has a second length L2, a second height H2, and a second width D2. The first tab 122 and the second tab 123 have a height h (the heights of the first tab 122 and the second tab 123 may be different, and in this example, the heights of the two are the same). Alternatively, H ≦ H1. The height h of the first tab 122 and the second tab 123 is 30-70mm, and the heights of the tabs can be adjusted according to actual needs, for example, according to the structure of the pouch battery and the structure of the thermal management system 3 for cooling the pouch battery. Optionally, the first tab 122 and the second tab 123 are disposed on a side surface (e.g., L1 × H1 surface or L1 × D1 surface) where the long side of the first cell 12 is located. Namely, the first tab 122 and the second tab 123 are located in the side plane formed by the first length L1 and the first width D1, wherein L1 is equal to or greater than H1, L1 is equal to or greater than D1, and D1 is equal to or greater than D2. Preferably, the first tab 122 and the second tab 123 are disposed on one side of the first cell 12 where the side area is the largest, so that a larger volume of the second cell 13 can be adapted, and the utilization rate of the cells in the length direction is improved.
It should be noted that, in the present invention, "length", "width" and "height" refer to each side edge of the cell, preferably, the first length L1> the first height H1> the first width D1 of the first cell 12, and when the cells are vertically arranged in a soft-package battery pack, the width can also be understood as the thickness of the cell, and it can be determined that the difference in definition, whether the "width" or the "thickness", does not affect the protection scope of the present invention.
Generally, the soft-package battery pack is horizontally placed in the electric automobile, and the arrangement of the soft-package battery pack is favorable when the length direction of the soft-package battery pack is consistent with the length direction of the automobile, but as a special arrangement mode, the length direction of the soft-package battery pack can also be consistent with the width direction of the automobile.
The length of the body of the existing electric vehicle is 2000mm-6000mm, such as 3000mm, 3500mm, 4000mm and 4500 mm; the width of the vehicle body is 1500mm-2000mm, such as 1600mm, 1800 mm. When laminate polymer battery's length and automobile body length direction were unanimous, laminate polymer battery satisfied with the ratio a of automobile body length at the ascending size of length direction: a is more than or equal to 40% and less than or equal to 80%, such as 40%, 50%, 60%, 70% and 80%; preferably, a is more than or equal to 55% and less than or equal to 70%; the ratio b of the size of the soft package battery in the width direction to the width of the vehicle body satisfies the following conditions: b is more than or equal to 40% and less than or equal to 90%, such as 40%, 50%, 60%, 70% and 80%; preferably, b is more than or equal to 55% and less than or equal to 80%.
Preferably, the ratio of the first length L1 to the first width D1 is in the range of 20-210, because L1 needs to be smaller than the width of the vehicle body, so as to avoid that the pouch battery pack cannot be mounted on the vehicle, and if the ratio of L1 to D1 is too large or too small, the current inside the battery is not uniform, and the battery efficiency is reduced. Preferably, the ratio of the first length L1 to the first width D1 ranges from 40 to 150.
In the laminate polymer battery package, laminate polymer battery 1's first length and laminate polymer battery package's width phase-match, because the battery utmost point ear sets up in laminate polymer battery top for laminate polymer battery package obtains improvement by a wide margin at the utilization ratio of horizontal direction, and L1's value range is 400mm-1400 mm. Alternatively, the ratio of L1 to H1 ranges from 4 to 50. This is because L1 needs to be smaller than the vehicle width to avoid that the pouch battery pack cannot be mounted on the vehicle, and if the ratio of L1 to H1 is too large or too small, the current inside the battery will be uneven, and the battery efficiency will be reduced. Preferably, the ratio of L1 to H1 is in the range of 10 to 25, and since the tabs no longer occupy space in the horizontal direction, the length of the battery can be further increased, the aspect ratio of the battery (i.e., the ratio of L1 to H1) can be further increased, and meanwhile, since the second battery cell 13 is disposed between the tabs, the volume utilization rate is not reduced due to the tabs being disposed above the battery cells.
The distance between the first tab 122 and the second tab 123 is d. Alternatively, the ratio of d to L1 ranges from 0.7 to 0.9. That is, the length between the first tab 122 and the second tab 123 is 0.7-0.9 times of the length of the first battery cell 12, so that a certain distance exists between the first tab 122 and the end of the first battery cell 12, and between the second tab 123 and the end of the first battery cell 12, the first tab 122 and the second tab 123 are prevented from being flush with the end of the first battery cell 12, the welding and installation difficulty of the first tab 122 and the second tab 123 with the pole piece 11 is reduced, and meanwhile, the internal current of the battery is easily uneven due to the excessively large distance between the first tab 122 and the second tab 123. If the distance between the first tab 122 and the second tab 123 is too small, the length of the second battery cell 13 is too short, and the usage rate of the space between the first tab 122 and the second tab 123 is too low, which is not beneficial to improving the volume utilization rate in the soft package battery pack. The ratio of L2 to d ranges from 0.7 to 0.9. That is, the length L2 of the second cell 13 is 0.7 to 0.9 times the distance between the first tab 122 and the second tab 123. If the distance is too short, the length of the second battery cell 13 is not enough, so that space waste is caused, and the volume utilization rate is reduced; if the distance is too long (the second cell 13 is too close to the first tab 122 and/or the second tab 123), the risk of battery short circuit is easily increased.
The second height H2 of the second cell 13 may be adjusted according to the actual pouch battery pack structure. The second height H2 of the second cell may be less than the height H of the first tab 122 and the second tab 123, or may be greater than or equal to the height H of the first tab 122 and the second tab 123. The structure of the soft package battery pack can be adjusted according to the relation between the soft package battery pack and the soft package battery pack so as to meet the requirements of the installation of the battery cell and the electric connection of the tabs.
In the present invention, the first cell 12 and the second cell 13 are merely names to distinguish the two from the position and the connection relationship. Preferably, the first cell 12 and the second cell 13 have the same structure and composition. The same structure means that both have the same width (i.e., D1= D2), the same composition means that both have the same material composition, for example, the positive electrode is composed of the binder, the conductive agent and the positive electrode active material, and both are completely consistent in the selection of the three aspects, and the usage amount (i.e., the usage amount ratio of each material) of each material is also completely the same, and it is understood by those skilled in the art that the complete consistency of the selection of the materials does not only mean the type of the materials, and should finally exhibit completely consistent electrical properties; or a complete special-shaped (i.e. non-rectangular parallelepiped shape) battery cell designed into a convex shape.
The first cell 12 and the second cell 13 may be prepared by directly forming the pole piece 11 into a specific shape, such as a "convex" shape, during the cutting process to form the integrated first cell 12 and the integrated second cell 13, and the present application does not particularly limit the preparation method and composition of the first cell 12 and the second cell 13, and any known connection method and preparation method can be used in the present invention without departing from the inventive concept of the present application.
As shown in fig. 1 to 8, the present invention provides a pouch battery pack, which may generally include a pouch battery 1, an outer frame 2, and a thermal management system 3. The outer frame 2 forms an inner space 21. The soft-package battery 1 is vertically arranged in parallel in the inner space 21 formed by the outer frame 2. Optionally, the length direction of the pouch battery 1 is the same as the width direction of the pouch battery pack, the width direction of the pouch battery 1 is the same as the height direction of the pouch battery pack, and the thickness direction of the pouch battery is the same as the length direction of the pouch battery pack (the length and the width referred to herein are specifically on the horizontal plane, and the length is greater than the width.
The invention provides a soft-package battery pack, wherein a thermal management system 3 of the soft-package battery pack comprises a cooling assembly 31 and a cooling medium circulating pipe 32. The cooling medium circulation pipe 32 includes an inlet pipe 321 and an outlet pipe 322. The inlet pipe 321 and the outlet pipe 322 are connected to the cooling module 31, respectively. In actual operation, the cooling medium enters through the inlet pipe 321, flows into the cooling module 31 and exchanges heat with the battery, and then flows out through the outlet pipe 322.
Preferably, the cooling member 31 is a flat plate type having a regular quadrangular horizontal cross section and is disposed above the battery. Cooling assembly 31 has a first size consistent with laminate polymer battery package length direction, a second size consistent with laminate polymer battery package width direction, a third size consistent with laminate polymer battery package direction of height. Preferably, the cooling module 31 is rectangular in horizontal cross-section. Further preferably, the ratio of the first dimension to the dimension of the pouch in the length direction ranges from 0.70 to 0.95, preferably from 0.75 to 0.90.
The cooling assembly 31 is located between the first tab 122 and the second tab 123. Preferably, the ratio of the second dimension of the cooling assembly 31 (i.e., the width D3 of the cooling assembly 31) to the distance D between the first tab 122 and the second tab 123 ranges from 0.70 to 0.90, and more preferably ranges from 0.75 to 0.85.
As an embodiment, the present application has no particular limitation on the specific structure of the horizontal cross section of the cooling module 31, and any shape that does not depart from the inventive concept of the present application can be used in the present application, including but not limited to rhombuses, equilateral triangles, regular pentagons, regular hexagons, or other irregular shapes.
As a particular embodiment of the present application, the shape of the cooling assembly 31 is irregular. When the horizontal section of the cooling member 31 is not a regular quadrangle, it has more than one first dimension or second dimension in the length direction, width direction of the pouch battery pack. Therefore, the maximum value and the length of the pouch battery pack, and the distance d between the first tab 122 and the second tab 123 satisfy the proportional relationship.
Preferably, the inlet tube 321 and the outlet tube 322 are located on the same side of the pouch; further preferably, the inlet pipe 321 and the outlet pipe 322 are located on the wide side of the pouch battery pack.
The specific structure of the cooling structure is not particularly limited, and any known cooling structure can be used in the present application, such as a cooling pipe and a cooling tank.
Preferably, the pouch battery pack further includes a spacer (not shown) for supporting the cooling assembly 31. The fixing connection of the positioning member to the cooling module 31 is not particularly limited in the present application, and any known fixing connection can be used in the present application.
Preferably, the laminate polymer battery pack of this application is provided with two or more group battery that constitute by a plurality of laminate polymer battery 1, separates through the barrier between the adjacent group battery.
The present application does not specifically require the form and structure of the barrier, and any known structure, such as plates, grooves, etc., can be used in the pouch battery pack of the present application without departing from the inventive concept of the present application.
In a specific embodiment, the pouch battery pack further includes an electrical connection plate 4. The electric connection plate 4 is disposed above the pouch battery 1. The electrical connection plate 4 includes a frame 41 and tab insertion grooves 42. The first tab 122 and the second tab 123 are inserted into the tab insertion slot 42 of the electrical connection plate 4. The first tab 122 and the second tab 123 are fixed and electrically connected to the electrical connection plate 4, respectively. Alternatively, the electrical connection plate 4 includes a first electrical connection plate and a second electrical connection plate. The first tab 122 passes through the tab slot 42 of the first electrical connection plate to be fixed and electrically connected with the first electrical connection plate. The second tab 123 passes through the tab insertion slot 42 of the second electrical connection plate to be fixed and electrically connected with the second electrical connection plate. Preferably, the positive and negative electrodes of adjacent pouch cells 1 are connected by an electrical connection plate 4 to form a series connection. For example, at the position on the same side of the pouch battery pack, the positive electrode (positive electrode tab) of any pouch battery 1 and the negative electrode (negative electrode tab) of the adjacent pouch battery are connected to the same electrical connection plate 4, that is, in the case of a battery pack composed of a plurality of pouch batteries 1, the pouch batteries 1 in the same battery pack are connected in series.
With this, series connection is realized to the battery in whole laminate polymer battery package, and if a battery left side in laminate polymer battery package is anodal utmost point ear, the right side is negative pole utmost point ear, then two laminate polymer batteries 1 around it is adjacent, the left side is negative pole utmost point ear, and the right side is anodal utmost point ear. Therefore, the left tabs of all the soft package batteries 1 in the whole soft package battery pack are negative-positive-negative-positive … …, and the right tabs are sequentially positive-negative-positive-negative … ….
As an embodiment of the present application, the first electrical connection plate and the second electrical connection plate are provided in connection. As another embodiment of the present application, the first and second electrical connection plates are independent of each other.
Preferably, the electrical connection plate 4 has a height greater than the second cell 13.
Preferably, the ratio of the distance of the electrical connection plate 4 to the bottom of the pouch to the distance of the cooling assembly 31 to the bottom of the pouch ranges from 0.9 to 1.1. Preferably, it is 0.95 to 1.05.
In whole laminate polymer battery package, electric connecting plate 4 is in same level with cooling module 31 for laminate polymer battery package's volume utilization ratio reaches the biggest.
Preferably, the soft package battery pack further comprises foam (not shown) arranged between two adjacent soft package batteries 1. The kind of the foam material is not particularly limited in this embodiment, and the kinds of materials that can absorb the cell expansion and insulate heat in the prior art can be used in this application, including but not limited to PU (polyurethane), CR (chloroprene rubber), EVA ("ethylene-vinyl acetate copolymer" and its made rubber-plastic foam material), and PE (polyethylene). The foam has low hardness and high resilience, and can absorb the bulging stress of the soft package battery to play a role in buffering; meanwhile, when the soft package battery is out of control due to heat, the foam can play a heat insulation role, inhibit heat diffusion and delay accidents.
When the soft package battery is installed, firstly, the soft package battery 1 is placed in the internal space 21, and the electric connection plate 4 is arranged at the position corresponding to the lug of the soft package battery 1, so that the lug of the soft package battery 1 is inserted into the lug insertion slot 42 of the electric connection plate 4; connecting all the soft package batteries in series; the cooling assembly 31 is placed on the pouch battery 1, and the cooling assembly 31 is fixed by a fixing connection method such as a fastener.
Table 1. examples 1-4 are statistical tables of volume utilization of pouch packs for different sizes
As can be seen from table 1, in examples 1 to 4, the volume utilization rate of the pouch battery pack can reach 70% or more by adopting the structure of the pouch battery pack provided by the present invention.
According to the characteristics of the soft package battery, the first tab 122 and the second tab 123 are arranged on the side surface of the first battery cell body 121, and the second battery cell 13 is arranged between the first tab 122 and the second tab 123, so that the first battery cell 12 and the second battery cell 13 are in a convex shape, the waste of space between the two tabs is avoided, and the volume utilization rate in the soft package battery is improved.
Claims (10)
1. A soft package battery pack comprises a soft package battery, an outer frame and a thermal management system; the outer frame forms an inner space, the soft-package battery is vertically arranged in the inner space formed by the outer frame in parallel, the length direction of the soft-package battery is consistent with the width direction of the soft-package battery pack, the width direction of the soft-package battery is consistent with the height direction of the soft-package battery pack, and the thickness direction of the soft-package battery is consistent with the length direction of the soft-package battery pack;
the soft package battery comprises a pole piece, the pole piece comprises a first battery cell and a second battery cell, the first battery cell comprises a first battery cell body, a first pole lug and a second pole lug, and the first pole lug and the second pole lug are positioned on the same side face of the first battery cell body; the second battery cell comprises a second battery cell body, and the second battery cell is arranged between the first electrode lug and the second electrode lug and is connected with the first battery cell;
the first cell has a first length L1, a first height H1, and a first width D1, the second cell has a second length L2, a second height H2, and a second width D2, and the first and second tabs have a height H; the first tab and the second tab are positioned in a side face formed by a first length L1 and a first width D1, wherein L1 is more than or equal to H1, and L1 is more than or equal to D1;
the ratio of the first length L1 to the first height H1 of the first cell ranges from 4 to 50;
the ratio of the first length L1 to the first width D1 of the first cell ranges from 20 to 210.
2. The soft-package battery pack according to claim 1, wherein the first length L1 of the first cell ranges from 400mm to 1500 mm.
3. The pouch according to claim 1, wherein the distance between the first tab and the second tab is d, and the ratio of d to L1 is in the range of 0.7-0.9.
4. The pouch according to claim 3, wherein the ratio of L2 to d is in the range of 0.7-0.9.
5. The pouch battery pack of claim 3, wherein the thermal management system comprises a cooling assembly, a cooling medium circulation tube comprising an inlet tube and an outlet tube, the inlet tube and the outlet tube being connected to the cooling assembly, respectively.
6. The pouch according to claim 5, wherein the inlet tube and the outlet tube are disposed on the cooling assembly at the broad sides of the pouch.
7. The pouch pack of claim 5, wherein the cooling assembly is located between the first tab and the second tab, the cooling assembly having a width D3, and a ratio of D3 to D ranging from 0.7 to 0.9.
8. The pouch according to claim 7, wherein the ratio of D3 to D is in the range of 0.75-0.85.
9. The pouch battery pack of claim 5, further comprising an electrical connection plate disposed above the pouch battery; the electric connection plate comprises a frame and a lug slot, the first lug and the second lug penetrate through the lug slot of the electric connection plate, and the first lug and the second lug are respectively fixed and electrically connected with the electric connection plate.
10. The pouch battery pack according to claim 9, wherein the positive and negative electrodes of adjacent pouch batteries are connected by the electrical connection plate to form a series connection;
be located laminate polymer battery package is with one side, arbitrary laminate polymer battery's positive pole and adjacent laminate polymer battery's negative pole is connected in the same the electricity link plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110440093.XA CN112864510B (en) | 2021-04-23 | 2021-04-23 | Soft package battery pack |
| PCT/CN2021/128378 WO2022222419A1 (en) | 2021-04-23 | 2021-11-03 | Pouch battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110440093.XA CN112864510B (en) | 2021-04-23 | 2021-04-23 | Soft package battery pack |
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| CN112864510A true CN112864510A (en) | 2021-05-28 |
| CN112864510B CN112864510B (en) | 2021-08-03 |
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| CN202110440093.XA Active CN112864510B (en) | 2021-04-23 | 2021-04-23 | Soft package battery pack |
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| CN (1) | CN112864510B (en) |
| WO (1) | WO2022222419A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN212011154U (en) * | 2020-04-30 | 2020-11-24 | 昆山宝创新能源科技有限公司 | Laminate polymer electric core and battery package and vehicle |
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| WO2022222419A1 (en) * | 2021-04-23 | 2022-10-27 | 苏州清陶新能源科技有限公司 | Pouch battery pack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112864510B (en) | 2021-08-03 |
| WO2022222419A1 (en) | 2022-10-27 |
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