CN218867241U - Compound mass flow body laminate polymer battery casing, laminate polymer battery and laminate polymer battery module - Google Patents

Abstract

The application relates to the technical field of batteries, in particular to a composite current collector soft package battery shell which comprises a shell body and a water cooling mechanism; the shell is provided with a groove body for containing the soft-package battery, the shell comprises an upper supporting beam, a middle supporting beam and a lower supporting beam, and the upper supporting beam and the middle supporting beam are connected through vertical supporting rods; the water cooling mechanism comprises a liquid inlet and a liquid outlet which are arranged on the top of the shell and a cooling cavity inside the shell. The utility model provides a laminate polymer battery, includes battery body and the binding post that is located the battery body top. The utility model provides a laminate polymer battery module, includes a plurality of casing and laminate polymer battery. The high-safety soft package battery shell has the high safety performance of anti-impact extrusion, cooling and cooling in an integrated body.

Description

Composite current collector soft package battery shell, soft package battery and soft package battery module

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a compound mass flow body laminate polymer battery casing, laminate polymer battery and laminate polymer battery module are related to.

Background

With the rapid development of new energy industries around the world, lithium ion batteries are widely used in the fields of energy storage, automobiles and the like due to the advantages of high energy density, good cycle performance and the like. However, the frequent occurrence of accidents such as battery ignition makes the safety problem of lithium ion batteries the most basic requirement of battery products, wherein, the internal short circuit of the batteries is the most important cause of the safety problem, and the external stress such as impact extrusion is one of the main causes of battery short circuit and ignition in the power batteries.

Novel compound copper foil aluminium foil mass flow body is the multilayer composite construction who has "polymer substrate intermediate level + frivolous conducting metal layer", and when the short circuit in the battery, accessible fusing and insulating provide great resistance and cut off or reduce short-circuit current in the short time, effectively prevent battery thermal runaway, improve battery security. However, the conventional copper foil and aluminum foil current collector has a heat conduction effect in addition to an electric conduction effect inside the lithium battery, and transfers heat inside the battery to the tabs. For the composite current collector, the middle polymer substrate (such as PET) of the composite current collector is a poor thermal conductor, and the metal conductive layer is only about 1 μm thick, so the reduction of the thickness affects the heat conduction performance of the metal conductive layer, and therefore the internal temperature rise of the lithium battery is more obvious. In conclusion, the advantages of the lithium ion battery and the composite current collector are fully exerted, the problem of internal temperature rise is solved, the anti-collision extrusion level is improved, and the method has important significance in improving the safety of the lithium ion battery.

Currently, lithium ion battery cases are divided into two main categories, one being soft-packaged batteries; one type is a metal-case battery, which comprises a steel case and an aluminum case, and the shapes of the metal-case battery are divided into a cylinder, a square and the like. The cylindrical lithium battery has the advantages of high automation degree, strong consistency, low cost and the like, but has the disadvantages of low capacity, high requirement on a heat dissipation system and the like; the square aluminum shell battery has higher safety, but has the defects of heavier shell, lower energy density, poorer safety and the like; the soft package battery has the advantages of high specific capacity, good safety, flexible design and the like, can realize light weight, but has the defects of easy occurrence of liquid leakage and the like. However, the soft package battery can only blow and split at most under the condition that potential safety hazard takes place, therefore soft package battery's overall security performance is high, and power battery is to the demand of lightweight in addition for soft package battery's use amount enlarges gradually.

At present, the soft package battery uses an aluminum-plastic film as a packaging shell, and the aluminum-plastic film is generally divided into three layers, namely an outer barrier layer (an outer protection layer made of nylon BOPA or PET), a barrier layer (an aluminum foil middle layer) and an inner layer (a multifunctional high barrier layer). The outermost nylon layer is required to have the requirements of impact resistance, heat resistance, friction resistance, insulation property and the like.

Traditional copper foil aluminium foil mass flow body still has the heat conduction effect except having the electrically conductive action in that the lithium cell is inside, with the inside heat transfer of battery to utmost point ear, to the compound mass flow body, the reduction of metal conducting layer thickness influences its heat conductivility for the inside temperature rise of lithium cell is more obvious, so need improve current cooling method. Meanwhile, the soft package battery uses the aluminum-plastic film as a packaging shell to form a battery monomer, then the module is integrated, and the nylon layer on the outermost layer of the aluminum-plastic film has limited effects in the aspects of extrusion resistance, friction resistance and the like. Therefore, for the composite current collector soft package battery, it is necessary to develop a high-safety soft package battery shell integrating impact resistance, extrusion, cooling and temperature reduction.

SUMMERY OF THE UTILITY MODEL

To as above the inside temperature rise that compound mass flow body battery exists is more obvious, and the outmost nylon layer of laminate polymer battery is in the limited scheduling problem of aspect effect such as anti extrusion, antifriction, this application provides a compound mass flow body laminate polymer battery casing, laminate polymer battery and laminate polymer battery module.

The application provides a pair of compound mass flow body laminate polymer battery casing, laminate polymer battery and laminate polymer battery module adopt following technical scheme:

a composite current collector soft package battery shell comprises a shell body and a water cooling mechanism; the shell is provided with a groove body for containing the soft-package battery, the shell comprises an upper supporting beam, a middle supporting beam and a lower supporting beam, and the upper supporting beam and the middle supporting beam are connected through vertical supporting rods; the water cooling mechanism comprises a liquid inlet and a liquid outlet which are arranged on the top of the shell and a cooling cavity inside the shell.

Through adopting above-mentioned technical scheme, the cell body of seting up on the casing is used for holding laminate polymer battery, and the design that the casing adopted upper portion supporting beam, middle part supporting beam and lower part supporting beam lets the casing present the form that the part surrounds the battery, and this casing can realize arbitrary series-parallel connection and use. And when laminate polymer battery took place the inflation, the naked part in the partial surrounding structure can provide certain space for the inflation, improves the security.

Preferably, the vertical support rod is provided with semicircular heat dissipation grooves, and the semicircular heat dissipation grooves are located on the front side and the rear side of the shell and are symmetrically distributed on the front side and the rear side.

Through adopting above-mentioned technical scheme, semi-circular heat dissipation hole has on the vertical support pole of casing, and the design that adopts semi-circular heat dissipation recess can increase the surface area of casing, has better radiating effect to after two adjacent casing equipment, can form circular heat dissipation pore, can provide gas flow path for the forced air cooling after the battery module is integrated, can select to increase the supplementary cooling of forced air cooling according to actual conditions, improve the heat dissipation of the compound mass flow body lithium battery module.

Preferably, the semicircular heat dissipation grooves are uniformly distributed on the vertical supporting rods, the reinforcing protrusions are arranged among the semicircular heat dissipation grooves, and the width of each reinforcing protrusion is not smaller than the diameter of each semicircular heat dissipation groove.

Through adopting above-mentioned technical scheme, laminate polymer battery can distribute out the heat is even by semicircular heat dissipation groove evenly distributed's design, still is equipped with between the semicircular heat dissipation groove and strengthens the arch, lets vertical support pole keep better intensity, guarantees the connection stability between an upper portion supporting beam, a middle part supporting beam and the lower part supporting beam.

Preferably, the liquid inlet and the liquid outlet are arranged on the same side of the top of the shell, the bottoms of the liquid inlet and the liquid outlet are respectively communicated with the water inlet and outlet flow channel in the cooling cavity, and a partition plate is arranged between the water inlet and outlet flow channel.

Through adopting above-mentioned technical scheme, set up inlet and liquid outlet in the same one side at battery case top to separate the casing for business turn over water runner through the baffle, not only be favorable to the integration of group battery, can also strengthen the flow homogeneity of coolant liquid in the casing, improve the liquid cooling effect.

Preferably, the connecting ports of the liquid inlet and the liquid outlet and the cooling cavity are semicircular openings, and the bodies of the liquid inlet and the liquid outlet are of pipeline-shaped structures.

Through adopting above-mentioned technical scheme, the connector of inlet and liquid outlet and cooling cavity adopts semi-circular opening to the effect through the baffle will cool off the cavity and separate into business turn over water flow way, improves the liquid homogeneity that flows, reduces the detention district of liquid, reinforcing heat transfer effect.

Preferably, a middle part supporting beam and laminate polymer battery install pressure sensor with its corresponding position, and wherein pressure sensor equipartition is at a middle part supporting beam's medial surface.

Through adopting above-mentioned technical scheme, pressure sensor is installed to middle part supporting beam's inboard, and the middle part crossbeam not only provides flow channel, improves the anti extrusion intensity of battery for the coolant liquid, can also regard as laminate polymer battery inflation alarm device's mounting, when laminate polymer battery takes place the inflation, and pressure sensor on the supporting beam of middle part receives the extrusion and takes place the warning promptly, effectively ensures battery security.

Preferably, the width of the middle supporting beam is smaller than the widths of the upper supporting beam and the lower supporting beam, reinforcing ribs are further arranged in the cooling cavity in the middle supporting beam, and the reinforcing ribs are of annular structures and distributed at four top corners of the cavity of the cooling cavity.

Through adopting above-mentioned technical scheme, the narrower design of adoption of middle part supporting beam can reduce the face that covers laminate polymer battery when guaranteeing to laminate polymer battery spacing, effectively improves laminate polymer battery's radiating effect to install the strengthening rib of loop configuration in a middle part supporting beam's cooling cavity, strengthened a middle part supporting beam's bulk strength, thereby let the less middle part supporting beam of width possess and stabilize spacing effect to laminate polymer battery.

Preferably, the whole of casing adopts platykurtic structure, and wherein the cell body opening on the casing is seted up at an upper portion supporting beam top, and laminate polymer battery's top still installs binding post.

Through adopting above-mentioned technical scheme, the whole cuboid structure that adopts the platykurtic of casing makes things convenient for the installation of group battery, and laminate polymer battery can be followed a supporting beam top in casing and packed into the casing, and the laminate polymer battery top still is equipped with binding post and can makes things convenient for the connection integration of group battery.

Preferably, the shell is made of aluminum, aluminum alloy, copper or copper alloy.

Preferably, the cooling cavity is filled with a cooling liquid, and the cooling liquid comprises one or more of water, glycol, liquid metal and nanofluid.

Through adopting above-mentioned technical scheme, fill the coolant liquid in the cooling chamber and carry out water-cooling circulation, such design can reduce or remove the use of cooling plate among the battery module.

The utility model provides a laminate polymer lithium cell, soft packet of lithium iron phosphate battery, soft packet of lithium manganate battery, soft packet of high nickel lithium cell or the mass flow body lithium ion battery of compound copper foil aluminium foil that laminate polymer lithium cell, soft packet of lithium iron phosphate battery, soft packet of lithium manganate battery are adopted to battery body and the binding post that is located the battery body top.

The utility model provides a laminate polymer battery module, includes a plurality of casing and laminate polymer battery, and the casing adopts foretell a compound mass flow body laminate polymer battery casing, and laminate polymer battery adopts foretell laminate polymer battery.

The laminate polymer battery is located inside the shell, the front face and the rear face of the shell are stacked, and semicircular heat dissipation grooves between adjacent shells are matched to form a circular heat dissipation pore channel.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the high-safety soft package battery shell integrating impact extrusion resistance and cooling is developed by starting from a soft package battery monomer and combining the integration condition of the existing soft package battery module, the use of a cooling plate in the battery module can be reduced or eliminated, and meanwhile, an expansion alarm device of the soft package battery can be additionally arranged on the shell, so that the safety of the battery is effectively guaranteed;

2. through designing the casing, satisfy the application of compound mass flow body laminate polymer battery to when laminate polymer battery takes place the inflation, the part surrounds the exposed part in the structure and can provide certain space for the inflation, improves the security.

Drawings

Fig. 1 is a schematic view of a combined structure of a housing and a pouch cell in a composite current collector pouch cell housing;

fig. 2 is a schematic structural diagram of a case in a composite current collector pouch cell case;

FIG. 3 is a schematic view of the circulation of cooling liquid at the liquid inlet and the liquid outlet of the water cooling mechanism in the composite current collector soft package battery shell;

fig. 4 is a schematic diagram of the circulation of a cooling fluid in the cooling cavity of a composite current collector pouch cell casing;

fig. 5 is a schematic structural diagram of a soft package battery module;

fig. 6 is a front view of a case in a composite current collector pouch cell case;

FIG. 7 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 6;

fig. 8 is an enlarged view at a in fig. 7.

Description of reference numerals: 1. a housing; 11. an upper support beam; 12. a middle support beam; 121. a pressure sensor; 13. a lower support beam; 14. a vertical support bar; 141. a semicircular heat dissipation groove; 142. a reinforcing protrusion; 2. a water cooling mechanism; 21. a liquid inlet; 22. a liquid outlet; 23. cooling the cavity; 231. reinforcing ribs; 24. a partition plate; 3. a pouch cell; 31. a battery body; 32. and a terminal.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses compound mass flow body laminate polymer battery casing.

Referring to fig. 1-8, the composite current collector soft package battery shell comprises a shell 1 and a water cooling mechanism 2; the shell 1 is provided with a groove body for accommodating the soft-package battery 3, the shell 1 comprises an upper supporting beam 11, a middle supporting beam 12 and a lower supporting beam 13, and the upper supporting beam 11 and the middle supporting beam 12, and the middle supporting beam 12 and the lower supporting beam 13 are connected through a vertical supporting rod 14; the water cooling mechanism 2 comprises a liquid inlet 21 and a liquid outlet 22 which are arranged at the top of the shell 1 and a cooling cavity 23 inside the shell 1. The groove body that sets up on casing 1 is used for holding laminate polymer battery 3, and casing 1 adopts the design of upper portion supporting beam 11, middle part supporting beam 12 and lower part supporting beam 13 to let casing 1 present the form that partly surrounds the battery, and this casing 1 can realize arbitrary series-parallel connection and use. And when the soft package battery 3 expands, the exposed part in the partial enclosing structure can provide a certain space for expansion, and the safety is improved.

Referring to fig. 1, 2 and 6, the vertical support bar 14 is provided with semicircular heat dissipation grooves 141, and the semicircular heat dissipation grooves 141 are located at the front and rear sides of the housing 1 and symmetrically distributed at the front and rear sides. Have semi-circular louvre on the vertical support pole 14 of casing 1, the design that adopts semi-circular heat dissipation recess 141 can increase casing 1's surface area, has better radiating effect to after two adjacent casings 1 assemble, can form circular heat dissipation pore, can provide gas flow path for the forced air cooling after the battery module is integrated, can select to increase the supplementary cooling of forced air cooling according to actual conditions, improves the heat dissipation of the compound mass flow body lithium battery module.

Referring to fig. 1, 6, the semicircular heat dissipation grooves 141 are uniformly distributed on the vertical support bar 14, and the reinforcing protrusions 142 are disposed between the semicircular heat dissipation grooves 141, and the width of the reinforcing protrusions 142 is not less than the diameter of the semicircular heat dissipation grooves 141. Semicircular heat dissipation recess 141 evenly distributed's design lets laminate polymer battery 3 can distribute out the heat is even, still is equipped with between the semicircular heat dissipation recess 141 and strengthens protruding 142, lets vertical support pole 14 keep better intensity, guarantees the connection stability between an upper portion supporting beam 11, a middle part supporting beam 12 and a lower part supporting beam 13.

Referring to fig. 1, 2 and 6, the liquid inlet 21 and the liquid outlet 22 are disposed on the same side of the top of the housing 1, and the bottoms of the liquid inlet 21 and the liquid outlet 22 are respectively communicated with the water inlet and outlet channels in the cooling cavity 23, and a partition plate 24 is disposed between the water inlet and outlet channels. The liquid inlet 21 and the liquid outlet 22 are arranged on the same side of the top of the battery shell 1, and the shell 1 is divided into a water inlet channel and a water outlet channel by the partition plate 24, so that the integration of a battery pack is facilitated, the flowing uniformity of cooling liquid in the shell 1 can be enhanced, and the liquid cooling effect is improved.

Referring to fig. 1, 2 and 6, the connection ports of the liquid inlet 21 and the liquid outlet 22 and the cooling cavity 23 are semicircular openings, and the bodies of the liquid inlet 21 and the liquid outlet 22 are in a pipeline-shaped structure. The connecting ports of the liquid inlet 21 and the liquid outlet 22 and the cooling cavity 23 are semicircular openings, and the cooling cavity 23 is separated into a water inlet channel and a water outlet channel under the action of the partition plate 24, so that the flowing uniformity of liquid is improved, the detention area of the liquid is reduced, and the heat exchange effect is enhanced.

Referring to fig. 1, 2 and 6, pressure sensors 121 are mounted at positions corresponding to the middle supporting beam 12 and the pouch cell 3, wherein the pressure sensors 121 are uniformly distributed on the inner side surface of the middle supporting beam 12. Pressure sensor 121 is installed to middle part supporting beam 12's inboard, and the middle part crossbeam not only provides flow channel, improves the anti extrusion strength of battery for the coolant liquid, can also regard as laminate polymer battery 3 inflation alarm device's mounting, when laminate polymer battery 3 takes place the inflation, and the pressure sensor 121 on the supporting beam 12 of middle part receives the extrusion and takes place the warning promptly, effectively ensures battery security.

Referring to fig. 1, 2 and 6, the width of the middle support beam 12 is smaller than the widths of the upper support beam 11 and the lower support beam 13, and reinforcing ribs 231 are further installed in the cooling cavity 23 inside the middle support beam 12, and the reinforcing ribs 231 are in an annular structure and are distributed at four top corners of the cavity of the cooling cavity 23. A supporting beam 12's the narrower design of adoption in middle part can reduce the face that covers laminate polymer battery 3 when guaranteeing that laminate polymer battery 3 is spacing, effectively improves laminate polymer battery 3's radiating effect to install loop configuration's strengthening rib 231 in a supporting beam 12's at the middle part cooling cavity 23, strengthened a supporting beam 12's at the middle part bulk strength, thereby let a supporting beam 12 at the middle part that the width is less possess and stabilize spacing effect to laminate polymer battery 3.

Referring to fig. 1, 2 and 6, casing 1's whole adoption platykurtic structure, wherein the cell body opening on casing 1 is seted up at an upper portion supporting beam 11 top, and binding post 32 is still installed at laminate polymer battery 3's top. Casing 1's whole adoption platykurtic structure makes things convenient for the installation of group battery, and laminate polymer battery 3 can be followed 1 upper portion of casing supporting beam 11 tops and packed into casing 1, and laminate polymer battery 3 top still is equipped with binding post 32 and can makes things convenient for the connection integration of group battery.

Referring to fig. 1 to 8, the housing 1 is made of aluminum, aluminum alloy, copper or copper alloy. The cooling cavity 23 is filled with a cooling liquid, and the cooling liquid includes one or more of water, glycol, liquid metal, and nanofluid. The cooling cavity is filled with cooling liquid for water cooling circulation, and the design can reduce or eliminate the use of a cooling plate in the battery module.

Referring to fig. 1, a laminate polymer battery 3, battery body 31 and the binding post 32 that is located battery body 31 top, battery body 31 adopt laminate polymer battery 3 to adopt soft packet of polymer lithium cell, soft packet of lithium iron phosphate battery, soft packet of lithium manganese oxide battery, soft packet of high nickel lithium cell or compound copper foil aluminium foil mass flow body lithium ion battery.

Referring to fig. 5, a laminate polymer battery 3 module, includes a plurality of casing 1 and laminate polymer battery 3, and casing 1 adopts foretell 3 casings 1 of a compound mass flow body laminate polymer battery, and laminate polymer battery 3 adopts foretell laminate polymer battery 3. Laminate arrangement between the casing 1 front and back, and the semicircular heat dissipation recess 141 cooperation formation circular heat dissipation pore between the adjacent casing 1 is located inside the casing 1 to laminate 3.

The working principle is as follows: referring to fig. 1-8, the opening of the tank body formed on the housing 1 is located on the upper support beam 11 at the top, the pouch cells 3 are installed in the tank body, the cooling liquid is introduced into the water cooling mechanism 2 through the liquid inlet 21, and is guided out from the liquid outlet 22 through the cooling cavity 23 in the housing 1 to form a water cooling cycle, when the battery module is formed by the housings 1 of the pouch cells 3, the semicircular heat dissipation grooves 141 formed on the vertical support rods 14 on two adjacent housings 1 form a circular hole to provide a gas flow channel for air cooling. Install at the inboard pressure sensor 121 of middle part supporting beam 12 can take place timely warning when the inflation at laminate polymer battery 3, effectively monitor and guarantee the security performance of battery.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (11)

1. The utility model provides a compound mass flow body laminate polymer battery casing which characterized in that: comprises a shell (1) and a water cooling mechanism (2); casing (1) is seted up and is held the cell body of laminate polymer battery (3), and casing (1) includes upper portion supporting beam (11), middle part supporting beam (12) and lower part supporting beam (13), and between upper portion supporting beam (11) and middle part supporting beam (12), connect through vertical bracing piece (14) between middle part supporting beam (12) and the lower part supporting beam (13); the water cooling mechanism (2) comprises a liquid inlet (21) and a liquid outlet (22) which are arranged at the top of the shell (1) and a cooling cavity (23) inside the shell (1).

2. The composite current collector pouch battery case of claim 1, wherein: the vertical supporting rod (14) is provided with semicircular heat dissipation grooves (141), and the semicircular heat dissipation grooves (141) are located on the front side and the rear side of the shell (1) and symmetrically distributed on the front side and the rear side.

3. The composite current collector pouch cell casing of claim 2, wherein: the semicircular heat dissipation grooves (141) are uniformly distributed on the vertical support rod (14), the reinforcing protrusions (142) are arranged between the semicircular heat dissipation grooves (141), and the width of each reinforcing protrusion (142) is not smaller than the diameter of each semicircular heat dissipation groove (141).

4. The composite current collector pouch battery case of claim 1, wherein: liquid inlet (21) and liquid outlet (22) set up in same one side at casing (1) top, and inlet (21) and liquid outlet (22) bottom communicate the business turn over water runner in cooling cavity (23) respectively, be equipped with baffle (24) between business turn over water runner.

5. The composite current collector pouch cell casing of claim 4, wherein: the connecting ports of the liquid inlet (21) and the liquid outlet (22) and the cooling cavity (23) adopt semicircular openings, and the bodies of the liquid inlet (21) and the liquid outlet (22) adopt pipeline-shaped structures.

6. The composite current collector pouch cell casing of claim 1, wherein: a middle part supporting beam (12) and laminate polymer battery (3) install pressure sensor (121) with its corresponding position, wherein pressure sensor (121) equipartition is at the medial surface of a middle part supporting beam (12).

7. The composite current collector pouch battery case of claim 1, wherein: the width of middle part supporting beam (12) is less than the width of upper portion supporting beam (11) and lower part supporting beam (13), and still installs strengthening rib (231) in cooling cavity (23) in middle part supporting beam (12), strengthening rib (231) are ring structure, and distribute in four apex angle departments of cooling cavity (23) cavity.

8. The composite current collector pouch cell casing of claim 1, wherein: the whole body of the shell (1) is of a flat cuboid structure, wherein a groove body opening in the shell (1) is formed in the top of the upper supporting beam (11).

9. The utility model provides a laminate polymer battery which characterized in that: including battery body (31) and binding post (32) that are located the battery body top, battery body (31) adopt polymer lithium cell, soft packet of lithium iron phosphate battery, soft packet of lithium manganate battery, soft packet of high nickel lithium cell or compound copper foil aluminium foil mass collector lithium ion battery.

10. The utility model provides a laminate polymer battery module which characterized in that: comprising a plurality of cases (1) and pouch cells (3), said cases (1) employing a composite current collector pouch cell case as claimed in claims 1-8, said pouch cells (3) employing a pouch cell as claimed in claim 9.

11. The laminate polymer battery module of claim 10, wherein: laminate the setting between casing (1) front and back, and semicircular heat dissipation recess (141) cooperation formation circular heat dissipation pore between adjacent casing (1) inside laminate polymer battery (3) are located casing (1).

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