CN216850038U - Laminated large-capacity lithium battery - Google Patents

Abstract

The utility model provides a lamination formula large capacity lithium cell belongs to energy storage battery technical field, and it includes utmost point post and a plurality of electric core body, and a plurality of electric core bodies are connected in parallel through utmost point post, are provided with thermal conductivity component and refrigeration heating element on the utmost point post, and refrigeration heating element refrigerates or heats a plurality of electric core bodies through thermal conductivity component. Through the utility model discloses a lamination formula large capacity lithium cell has realized the function to the required refrigeration of large capacity lithium cell during operation and heating.

Description

Laminated large-capacity lithium battery

Technical Field

The utility model belongs to the technical field of the energy storage battery, a large capacity lithium cell technique is related to, specifically is a lamination formula large capacity lithium cell.

Background

The square lithium battery with the maximum capacity in the market is 400Ah at present, the energy storage battery industry is well developed under the background of 'carbon peak reaching' and 'carbon neutralization', meanwhile, the requirement on the capacity of the energy storage battery is higher and higher, more and more high-capacity energy storage batteries are produced in the market, the larger the capacity of the energy storage battery is, the more heat generated in the battery is, and the difficulty in heat dissipation of the high-capacity lithium battery is caused; meanwhile, batteries used in extreme cold environments or environments with large day-night temperature difference need to be heated in order to ensure normal starting and working of the batteries, so that the simultaneous heat dissipation and refrigeration of the batteries with large electric capacity is a major problem for those skilled in the art.

The invention patent with the patent number of 202011400301.5 discloses a lithium ion battery, a battery module and a battery pack, wherein the lithium ion battery comprises a shell and a battery core group arranged in the shell, the battery core group comprises a plurality of battery cells arranged in parallel along the length direction of the lithium ion battery, each battery cell is provided with a positive electrode lug and a negative electrode lug, the positive electrode lugs and the negative electrode lugs are respectively positioned at two sides of the battery cells, the positive electrode lugs of the battery cells are connected through a first connecting sheet, and the negative electrode lugs of the battery cells are connected through a second connecting sheet. This patent is mainly connected anodal utmost point ear and negative pole utmost point ear through first connection piece and second connection piece, and the area of contact is connected between increase connection piece and the utmost point ear, conducts the heat away through first connection piece and second connection piece, carries out the battery heat dissipation.

The utility model with patent number 202021196908.1 discloses a core heating type storage battery, which comprises a shell, a battery unit, a positive pole column, a negative pole column and a heating pole column; the battery units are connected in series and parallel to form a storage battery; the positive electrode and the negative electrode of the battery unit are respectively converged into a positive pole column and a negative pole column; a heating unit is clamped between the battery units; the heating units are connected in parallel; two ends of the heating unit are respectively provided with a first tab and a second tab; the second tab is positioned in the storage battery and is connected with the negative electrode in a welding way; the first tab is gathered on the top cover of the shell and forms a heating pole column by crimping the metal shell. The battery core part electrolyte is heated by the heating unit, so that the battery core part is at normal temperature under the low-temperature condition, the low-temperature charge and discharge capacity of the storage battery is greatly improved, and the storage battery can recover the normal-temperature performance under the harsh low-temperature condition.

Through the analysis, the prior art mainly arranges the heat conduction structure in the battery, the heat generated in the battery is led out through the heat conduction structure, and the heat dissipation in the battery is promoted through the convection of the heat conduction structure and air, but the heat dissipation effect is not ideal; meanwhile, the method cannot be applied to an extremely cold environment or an environment with large day and night temperature difference; although the above disclosure provides the battery with the heating column, it is impossible to dissipate heat from the battery by discharging the heat from the battery when the battery is overheated.

SUMMERY OF THE UTILITY MODEL

To the problem that large capacity lithium cell need not only heat but also need refrigerated at the during operation among the above-mentioned prior art, the utility model provides a lamination formula large capacity lithium cell.

The utility model discloses mainly through set up heat conduction subassembly and refrigeration/heating element on utmost point post, give off the heat that the battery produced through heat conduction subassembly and refrigeration/heating element, when needing to heat, heat the battery inside through refrigeration/heating element simultaneously, make the battery normally work, solved the problem that the large capacity lithium cell need heat and need refrigerate both when starting and working; the specific technical scheme is as follows:

the utility model provides a laminated large capacity lithium cell, includes utmost point post and a plurality of electric core body, and a plurality of electric core bodies are parallelly connected through utmost point post, be provided with thermal conductivity component and refrigeration/heating element on the utmost point post, refrigeration/heating element refrigerates or heats a plurality of electric core bodies through thermal conductivity component.

Further inject, be connected with utmost point ear on the electric core body, one end or both ends of utmost point ear outwards extend and form utmost point ear hem, utmost point ear passes through utmost point ear hem and is connected with utmost point post.

Further, the width of the tab folding edge is larger than that of the tab.

Further limiting, a protruding guide pipe is arranged on the shell of the battery cell body and is sealed, a pull ring is connected to the guide pipe, and a weak groove is formed in the side wall of the guide pipe.

Further inject, be provided with a plurality of mounting grooves on the utmost point post, the mounting groove sets up along the length direction of utmost point post, heat conduction assembly arranges in the mounting groove, heat conduction assembly and a plurality of electric core body contact.

Further limited, the heat conducting component is a soaking pipe or a soaking exhaust.

Further limited, one side or two sides of the top of the pole are provided with jacks, and the jacks are used for placing a refrigeration/heating assembly.

Further defined, the refrigeration/heating assembly includes a heat pipe and a heater rod, both of which are disposed within the receptacle.

Further defined, the refrigeration/heating assembly further comprises a semiconductor refrigerator, and the semiconductor refrigerator is connected with the heat pipe.

Further, the semiconductor refrigerator is arranged above the battery cell body.

Further inject, the top of utmost point post is provided with the fixed slot, be provided with heating plate and soaking row in the fixed slot, the soaking is arranged and is connected with semiconductor cooler.

Further limiting, the interior of the pole is of a hollow structure, the hollow structure is of a vacuum cavity, a heat-conducting fire extinguishing medium is filled in the hollow structure, the pole is provided with a fusible alloy piece, and the melting point of the fusible alloy piece is larger than 130 ℃.

Further defined, the heat-conducting fire extinguishing medium is water, perfluorohexanone or halogenated alkane.

Further define, be provided with multilayer screen cloth in the hollow structure and pile up and form the capillary hole, the capillary hole sets up along the length direction of utmost point post.

Further limited, the pole is a ladder-shaped pole or a wedge-shaped pole with large top cross section area and small bottom cross section area.

Further inject, the utmost point ear includes anodal utmost point ear and negative pole utmost point ear, anodal utmost point ear and negative pole utmost point ear set up respectively in the relative both sides of electricity core body, anodal utmost point ear is aluminum plate, negative pole utmost point ear is copper aluminium composite sheet.

Further limited, the shell of the cell body is a plastic shell.

Further defined, the plastic shell has a melting point greater than 130 ℃.

The plastic shell is further limited to be made of one or a combination of two or more of polyformaldehyde, polyvinyl chloride, polypropylene, polyamide, polyethylene terephthalate, polybutylene terephthalate, polycarbonate and polyester resin.

The laminated high-capacity lithium battery further comprises a battery shell and a battery upper cover plate, wherein the pole, the plurality of cell bodies and the soaking pipe are all arranged in an inner cavity of the battery shell, and the battery upper cover plate is arranged at an opening at the top of the battery shell; the heat pipe penetrates through the upper cover plate of the battery and extends to the upper part of the upper cover plate of the battery to be connected with the semiconductor refrigerator; the pole column penetrates through the upper cover plate of the battery and extends to the upper part of the upper cover plate of the battery.

Further inject, the top of utmost point post is provided with the apron ka tai, be provided with the joint groove on the battery upper cover plate, apron ka tai joint is at joint inslot with utmost point post and battery upper cover plate fixed connection.

Further limiting, a heat pipe panel is arranged at the top of the upper battery cover plate, and the heat pipe penetrates through the heat pipe panel and is fixedly connected with the upper battery cover plate through the heat pipe panel; the cover plate clamping table penetrates through the heat pipe embedding plate and extends to the upper part of the heat pipe embedding plate; and the top of the pole is provided with a pole wiring hole.

Further inject, be provided with C type insulating seal circle on the joint groove of battery upper cover plate and the contact surface of apron card platform.

Further, an opening is formed in the insulating base plate, and the top of the C-shaped insulating sealing ring penetrates through the opening and extends to the position above the opening.

Further limiting, the heat pipe panel and the pole tightly press the C-shaped insulating sealing ring.

Further limited, the battery shell is provided with radiating fins.

Further inject, be provided with the pressure release mouth on the battery upper cover plate, pressure release mouth department is provided with the pressure release subassembly.

Further defined, the pressure relief assembly is a pressure relief membrane or valve.

Further limit, the relief valve is a spring type relief valve or a diaphragm type relief valve.

Further inject, be provided with gas treatment device above the pressure release mouth, the pressure release mouth passes through pressure release subassembly and gas treatment device intercommunication.

Further inject, gas processing apparatus is including holding the box, the bottom that holds the box is provided with the pressure release gas entry, the top that holds the box is provided with the residual air export, be provided with the cooling adsorbed layer in the inner chamber that holds the box.

Further define, the cooling adsorbed layer includes cooling layer and the adsorbed layer that sets gradually from bottom to top along the gas flow direction.

Further limited, the cooling layer is one or a combination of two or more of ceramic balls, honeycomb ceramic pieces, porous ceramics and graphite rods.

Further limited, the adsorption layer is one or a combination of two or more of activated carbon, porous silica, molecular sieve, porous ceramic and adsorption resin.

Further, a collecting bag is arranged at the residual gas outlet and is used for collecting residual gas after cooling and adsorption.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the utility model relates to a laminated large capacity lithium cell, it includes utmost point post and a plurality of electric core body, and a plurality of electric core bodies are parallelly connected through utmost point post, are provided with thermal conductivity component and refrigeration/heating element on utmost point post, and refrigeration/heating element refrigerates or heats a plurality of electric core bodies through thermal conductivity component. The heat generated by the battery core body in the working process of the battery can be conducted to the refrigerating/heating assembly through the heat conducting assembly, and the heat is dissipated through the refrigerating/heating assembly, so that the risk of thermal runaway caused by local overheating in a high-capacity lithium battery is reduced; the high-capacity lithium battery can be heated in a low-temperature environment or an environment with large day and night temperature difference through the refrigerating/heating assembly, so that the high-capacity lithium battery can work normally; through the utility model discloses a required refrigeration of during operation and the heating function of large capacity lithium cell have been realized to lamination formula large capacity lithium cell.

2. Be provided with utmost point ear hem on utmost point ear, made things convenient for utmost point ear and utmost point post to carry out fixed connection through utmost point ear hem, and increased the connection area of connecting back utmost point ear and utmost point post, guaranteed that the junction contact of utmost point ear and utmost point post is good.

3. A protruding guide pipe is arranged on the shell of the battery cell body, a pull ring is connected to the guide pipe, and a weak groove is formed in the side wall of the guide pipe. Can break the pipe from weak groove department through the pull ring for electrolyte is shared to a plurality of electric core bodies, has avoided the difference influence each other of a plurality of electric core body during operation.

4. Be provided with a plurality of mounting grooves along length direction on utmost point post, the mounting groove is arranged in to the soaking pipe, and every mounting groove corresponds a soaking pipe. The soaking pipe and the pole are conveniently and fixedly connected through the mounting groove.

5. The pole is also provided with a jack, a heat pipe is inserted in the jack, the soaking pipe is connected with the semiconductor refrigerator through the heat pipe, the heat on the soaking pipe can be transferred to the semiconductor refrigerator through the heat pipe, and the heat is dissipated through convection of the semiconductor refrigerator and air; the heat dissipation efficiency of the high-capacity lithium battery is improved.

6. Still be provided with the heating rod in the jack, heat the battery through the heating rod when the battery is in low temperature environment or in the great environment of the temperature difference round the clock, ensure that the battery can normal work and normal start.

7. The refrigeration/heating assembly further comprises a semiconductor refrigerator, and the semiconductor refrigerator is connected with the heat pipe. The heat dissipation efficiency of the heat pipe is improved through the semiconductor refrigerator.

8. The pole is internally of a hollow structure, the hollow structure is a vacuum cavity, a heat-conducting fire extinguishing medium is filled in the hollow structure, and the pole is provided with a fusible alloy piece. When the battery takes place thermal runaway, the weak point fuses under the high temperature effect and releases heat conduction fire extinguishing medium to the battery inside, puts out a fire to the battery, prevents that thermal runaway from further worsening, controls thermal runaway. A plurality of layers of screen meshes are arranged in the hollow structure and stacked to form capillary holes, and the capillary holes are arranged along the length direction of the pole; the pole is equivalent to a heat pipe through the capillary hole, so that bidirectional heat conduction is realized, and heat generated by the battery can be transferred to the heat pipe through the heat conducting assembly to dissipate the heat of the battery; and the heat generated by the battery heating rod can be transferred to the battery through the heat conducting assembly to heat the battery.

9. The pole is a ladder-shaped pole or a wedge-shaped pole with large top cross section area and small bottom cross section area; for a large-capacity battery, the more upward the pole is, the larger the current is, so that the pole can be prevented from being burnt excessively; meanwhile, the material is saved, and the cost is reduced.

10. And a heat dissipation fin is arranged on the battery outer shell. The heat generated in the battery can be dissipated through the radiating fins, and the heat dissipation efficiency is further improved.

11. The utility model discloses laminated large capacity lithium cell still includes battery case body and battery upper cover plate, and utmost point post, a plurality of electric core bodies and soaking pipe arrange the inner chamber of battery case body in, form inclosed space for electric core body work through battery case body and battery upper cover plate, can communicate every electric core body with the inner chamber of battery case body at electric core body during operation for the inside inner chamber with the battery case body of electric core body forms common electrolyte system, strengthens the uniformity of electric core body during operation.

12. The top of utmost point post is provided with the apron ka tai, is provided with the joint groove on battery upper cover plate, and apron ka tai joint is at joint inslot with utmost point post and battery upper cover plate fixed connection. The cover plate clamping table facilitates the fixed connection between the pole and the upper cover plate of the battery.

13. The C-shaped insulating sealing ring is arranged at the joint of the cover plate clamping table and the clamping groove, and the cover plate clamping table and the upper cover plate of the battery are in an insulating state through the C-shaped insulating sealing ring, so that the safety of the battery during working is improved.

14. The top of the battery upper cover plate is provided with a heat pipe panel, the heat pipe can be fixed through the heat pipe panel, and meanwhile the battery upper cover plate can be pressed through the heat pipe panel. Be provided with utmost point post wiring hole on the apron ka tai, can make things convenient for parallelly connected or series connection between the large capacity lithium cell through utmost point post wiring hole, perhaps be connected with the outside equipment that needs the power supply.

15. An insulating pad is arranged between the heat pipe panel and the upper cover plate of the battery. The insulating property of the high-capacity lithium battery is enhanced through the insulating base plate, and the safety of the battery during working is improved.

16. A gas processing device is arranged above the pressure relief opening, and the pressure relief opening is communicated with the gas processing device through a pressure relief assembly; combustible gas generated by thermal runaway of the battery can be cooled through the gas treatment device, and combustible components in the combustible gas are absorbed; preventing the combustible gas from contacting with air/oxygen and causing explosion or fire.

17. And a collecting bag is arranged at the residual gas outlet and is used for collecting residual gas after cooling and adsorption. And the pollution of the atmosphere caused by directly discharging the residual gas into the air is prevented.

Drawings

Fig. 1 is a schematic structural view of a cell body of the present invention;

fig. 2 is a schematic structural diagram of a cell body with folded edges of polar ears;

fig. 3 is a schematic structural view of the pole of the present invention;

fig. 4 is a schematic structural view of the plug assembly pressing shell of the present invention;

fig. 5 is a schematic structural view of the connection between the pole and the cell body of the present invention;

FIG. 6 is a schematic view of the assembly of the battery top cover and the terminal post;

fig. 7 is an overall schematic view of the laminated large capacity lithium battery of the present invention;

FIG. 8 is a schematic diagram of a stacked large capacity lithium battery with a semiconductor cooler;

fig. 9 is a schematic structural view of a pole with a hollow cavity;

FIG. 10 is a schematic view of a pole structure with a top-mounted soaking row or heating plate;

FIG. 11 is a schematic structural view of a ladder-shaped pole;

fig. 12 is a schematic structural view of a wedge-shaped pole;

FIG. 13 is a schematic diagram of a grid-like conductive sheet;

FIG. 14 is a schematic view of the structure of the gas processing apparatus;

the battery comprises a battery core body 1, a conduit 101, a tab 2, a tab 201, a tab folding edge 3, a terminal 3, a mounting groove 301, a jack 302, a terminal connection hole 303, a cover plate clamping table 304, an easy-to-hold metal piece 305, a heating plate 306, a core pack pressing shell 4, a battery outer shell 5, a battery upper cover plate 6, a sealing rubber ring 7, an insulating sealing ring 8-C, an insulating base plate 9, a heat pipe panel 10, a heat pipe panel 11, a heat pipe 12, a semiconductor refrigerator 13, a grid-shaped conducting plate 1301, an easy-to-melt metal weak groove 14, a pressure relief gas inlet 15, a cooling layer 16, an adsorption layer 16 and a residual gas outlet 17.

Detailed Description

The technical solution of the present invention is further explained below with reference to the drawings and examples, but the present invention is not limited to the embodiments explained below.

The utility model relates to a laminated large capacity lithium cell, including utmost point post 3 and a plurality of electric core body 1, a plurality of electric core body 1 are parallelly connected through utmost point post 3, are provided with thermal conductivity component and refrigeration/heating element on utmost point post 3, and refrigeration/heating element refrigerates or heats a plurality of electric core body 1 through thermal conductivity component. Be connected with utmost point ear 2 on the electric core body 1, one end or both ends of utmost point ear 2 outwards extend and form utmost point ear hem 201, and utmost point ear 2 is connected with utmost point post 3 through utmost point ear hem 201. The width of the tab flange 201 is greater than that of the tab 2. The shell of the battery cell body 1 is provided with a protruding guide pipe 101, the guide pipe 101 is sealed, the guide pipe 101 is connected with a pull ring, and the side wall of the guide pipe 101 is provided with a weak groove. Be provided with a plurality of mounting grooves 301 on utmost point post 3, mounting groove 301 sets up along the length direction of utmost point post 3, and in mounting groove 301 was arranged in to heat-conducting component, heat-conducting component and the contact of a plurality of electricity core body 1. The heat conducting component is a soaking pipe or a soaking exhaust. One side or two sides of the top of the pole 3 are provided with jacks 302, and the jacks 302 are used for placing a refrigeration/heating assembly. The refrigeration/heating assembly includes a heat pipe 11 and a heating rod, both of which are disposed within the receptacle 302. The cooling/heating assembly further includes a semiconductor cooler 12, the semiconductor cooler 12 being connected to the heat pipe 11. The semiconductor refrigerator 12 is disposed above the cell body 1. The top of utmost point post 3 is provided with the fixed slot, is provided with heating plate 306 and soaking row in the fixed slot, and the soaking is arranged and is connected with semiconductor cooler. The inside hollow structure that is of utmost point post 3, hollow structure are the vacuum cavity, and the heat conduction medium of putting out a fire is filled into to hollow structure, is provided with fusible alloy piece 305 on utmost point post 3, and the melting point of fusible alloy piece 305 is greater than 130 ℃. The heat-conducting fire extinguishing medium is water, perfluorohexanone or halogenated alkane. A plurality of layers of screen meshes are arranged in the hollow structure and stacked to form capillary holes, and the capillary holes are arranged along the length direction of the pole 3. The pole 3 is a ladder-shaped pole or a wedge-shaped pole with large top cross section area and small bottom cross section area. The tab 2 comprises a positive tab and a negative tab, the positive tab and the negative tab are respectively arranged on two opposite sides of the cell body 1, the positive tab is an aluminum plate, and the negative tab is a copper-aluminum composite plate. The shell of the battery cell body 1 is a plastic shell. The melting point of the plastic shell is greater than 130 ℃. The plastic shell is made of one or a combination of two or more of polyformaldehyde, polyvinyl chloride, polypropylene, polyamide, polyethylene terephthalate, polybutylene terephthalate, polycarbonate and polyester resin. The laminated high-capacity lithium battery also comprises a battery outer shell 5 and a battery upper cover plate 6, wherein the pole 3, the plurality of battery cell bodies 1 and the soaking pipe are all arranged in the inner cavity of the battery outer shell 5, and the battery upper cover plate 6 is arranged at the opening at the top of the battery outer shell 5; the heat pipe 11 penetrates through the upper battery cover plate 6 and extends to the position above the upper battery cover plate 6 to be connected with the semiconductor refrigerator 12; the pole 3 penetrates through the upper battery cover 6 and extends above the upper battery cover 6. The top of utmost point post 3 is provided with apron ka tai 304, is provided with the joint groove on the battery upper cover plate 6, and apron ka tai 304 joint is at joint inslot with utmost point post 3 and 6 fixed connection of battery upper cover plate. The joint of the cover plate clamping platform 304 and the clamping groove is provided with a C-shaped insulating sealing ring 8. A heat pipe panel 10 is arranged at the top of the upper battery cover plate 6, and a heat pipe 11 penetrates through the heat pipe panel 10 and is fixedly connected with the upper battery cover plate 6 through the heat pipe panel 10; the cover clip 304 extends through the heat pipe panel 10 and extends above the heat pipe panel 10; the top of utmost point post 3 is provided with utmost point post wiring hole. And a C-shaped insulating sealing ring 8 is arranged on the contact surface between the clamping groove of the upper battery cover plate 6 and the clamping platform 304 of the cover plate. The insulating pad 9 is provided with an opening, and the top of the C-shaped insulating sealing ring 8 penetrates through the opening and extends to the upper part of the opening. The heat pipe panel 10 and the pole 3 press the C-shaped insulating seal ring 8 tightly. The battery case 5 is provided with heat radiating fins. A pressure relief opening is formed in the upper cover plate 6 of the battery, and a pressure relief assembly is arranged at the pressure relief opening. The pressure relief component is a pressure relief film or a pressure relief valve. The pressure release valve is a spring type pressure release valve or a diaphragm type pressure release valve. And a gas processing device is arranged above the pressure relief opening, and the pressure relief opening is communicated with the gas processing device through a pressure relief assembly. The gas treatment device comprises a containing box body, a pressure relief gas inlet 14 is formed in the bottom of the containing box body, a residual gas outlet 17 is formed in the top of the containing box body, and a cooling adsorption layer is arranged in an inner cavity of the containing box body. The cooling adsorption layer comprises a cooling layer 15 and an adsorption layer 16 which are arranged in sequence from bottom to top along the gas flowing direction. The cooling layer 15 is one or a combination of two or more of ceramic balls, honeycomb ceramic pieces, porous ceramics and graphite rods. The adsorption layer 16 is one or a combination of two or more of activated carbon, porous silica, molecular sieve, porous ceramic and adsorption resin. And a collecting bag is arranged at the residual gas outlet 17 and is used for collecting residual gas after cooling and adsorption.

Example 1

Referring to fig. 1-4, the laminated high-capacity lithium battery of the present embodiment includes a terminal 3 and 20 battery cell bodies 1, where the terminal 3 is provided with a heat conducting assembly and a refrigerating/heating assembly, and the refrigerating/heating assembly refrigerates or heats the plurality of battery cell bodies 1 through the heat conducting assembly. The utmost point post has two, is anodal post and negative pole post respectively, all is provided with two utmost point ears 2 on every electric core body 1, is anodal utmost point ear and negative pole utmost point ear respectively, and 20 anodal utmost point ears of electric core body 1 pass through anodal post parallel connection, and 20 negative pole utmost point ears of electric core body 1 pass through negative pole post parallel connection.

In the embodiment, the casing of the battery cell body 1 is provided with the protruding guide pipe 101, the guide pipe 101 is arranged at the side part of the battery cell body 1, and the position of the guide pipe 101 does not conflict with the arrangement positions of the positive electrode lug and the negative electrode lug; the conduit 101 is in a sealed state; the guide pipe is sealed by a sealing plug or a sealant, a pull ring is arranged on the guide pipe 101, and a weak groove is arranged on the side wall of the guide pipe 101; the duct 101 breaks along the weakening groove when the pull ring is pulled.

Preferably, the pull ring is disposed at the end of the catheter 101.

The battery module that compresses tightly formation large capacity battery is piled up in proper order to 201 top-down of electric core body of this embodiment, sets up a splint in 1 below of electric core body of bottommost, sets up a splint in 1 top of electric core body to the top, fixes, spacing 20 electric core body 1 through two splint.

Preferably, the pole 3 of the present embodiment is made of aluminum. It should be noted that the number of the cell bodies 1 of the present embodiment may be 5, 10, 15, 25, 30, 35, or even more, and the specific number may be increased or decreased according to the capacity requirement of the high-capacity lithium battery.

Example 2

The embodiment provides a laminated large-capacity lithium battery, which comprises a pole 3 and 30 battery cell bodies 1, wherein the pole 3 is provided with a heat conduction assembly and a refrigeration/heating assembly, and the refrigeration/heating assembly refrigerates or heats the plurality of battery cell bodies 1 through the heat conduction assembly. The utmost point post has two, is anodal post and negative pole post respectively, all is provided with two utmost point ears 2 on every electric core body 1, is anodal utmost point ear and negative pole utmost point ear respectively, and 30 electric core body 1's anodal utmost point ear passes through anodal post parallel connection, and 30 electric core body 1's negative pole utmost point ear passes through negative pole post parallel connection.

Referring to fig. 5, all be provided with 8 mounting grooves 301 on positive post and negative pole post, 8 mounting grooves 301 set up side by side along the length direction of positive post and negative pole post, and 8 mounting grooves 301 set up same side at positive post and negative pole post, and heat-conducting component is soaking pipe or soaking row, and is preferred, and the heat-conducting component of this embodiment is the soaking row, at every installation internal fixation be provided with a soaking pipe or soaking row. The 30 battery cell bodies 1 are in close contact with the soaking pipes and the heating pipes on the positive pole column and the negative pole column, and the soaking pipes are connected with the refrigerating/heating assembly.

Further preferably, the soaking exhaust of the present embodiment is soaking aluminum exhaust.

Preferably, the 30 cell bodies 1 of the present embodiment are compressed and fixed by the cell pack compression shell 4.

It should be noted that the number of the mounting grooves 301 in this embodiment may be 3, 5, 10, 15, or even more, and the data may be increased or decreased according to the capacity of the battery.

It should be noted that the number of the cell bodies 1 of the present embodiment may be 5, 10, 15, 25, 30, 35, or even more, and the specific number may be increased or decreased according to the capacity requirement of the high-capacity lithium battery.

The utility model discloses on embodiment 1 and embodiment 2's basis, it is provided with jack 302 in top one side or both sides of utmost point post 3, and is preferred, all is provided with jack 302 in the top both sides of utmost point post 3, and jack 302 is used for grafting refrigeration/heating element.

Referring to fig. 8, the cooling/heating assembly of the present invention includes a heat pipe 11, a heating rod and a semiconductor cooler 12, wherein the heat pipe 11 and the heating rod are inserted into each of the insertion holes 302, and the heat pipe 11 and the heating rod are connected to a soaking bar or a soaking pipe, and the top of the heat pipe 11 is connected to the semiconductor cooler 12 in close contact therewith. The semiconductor refrigerator 12 is disposed above the cell body 1.

Referring to fig. 10, preferably, the utility model discloses still be provided with the fixed slot at the top of utmost point post 3, the fixed slot sets up along utmost point post 3's width direction, installs heating plate 306 and soaking row in the fixed slot, and is preferred, and this heating plate 306 and soaking row all are connected with the soaking pipe.

Preferably, the soaking pipe of the embodiment is a copper pipe and an aluminum pipe containing a heat conducting working medium.

Referring to fig. 9, the utility model discloses an inside hollow structure that is of utmost point post 3, hollow structure are the vacuum cavity, are filled with heat conduction fire extinguishing medium in hollow structure, are provided with fusible alloy spare 305 on utmost point post 3, and fusible alloy spare 305's melting point is greater than 130 ℃. When thermal runaway appeared in the battery, the high-temperature environment that the thermal runaway produced opened fusible alloy part 305, and the heat-conducting fire extinguishing medium in the hollow structure was sprayed into the battery to extinguish the fire of the battery and control the thermal runaway. A plurality of layers of screen meshes are arranged in the hollow structure and stacked to form capillary holes, and the capillary holes are arranged along the length direction of the pole 3. The capillary holes and the heat-conducting extinguishing medium act together to enable the pole to become a heat pipe, and bidirectional heat conduction can be performed.

It should be noted that the heat-conducting fire extinguishing medium is water, perfluorohexanone or halogenated alkane. Preferably, the heat-conducting fire extinguishing medium is perfluorohexanone.

Referring to fig. 11 and 12, preferably, the terminal 3 of the present invention is a ladder-shaped terminal or a wedge-shaped terminal with a large top cross-sectional area and a small bottom cross-sectional area. This structure can effectively prevent 3 overburning of utmost point post, has saved the material simultaneously, has practiced thrift the cost.

Preferably, the utility model discloses a positive pole utmost point ear and negative pole utmost point ear set up respectively in the 1 relative both sides of electricity core body, and positive pole utmost point ear is aluminum plate, and negative pole utmost point ear is copper aluminium composite sheet.

Preferably, the utility model discloses electricity core body 1's casing is plastic casing. The melting point of the plastic shell is greater than 130 ℃.

The plastic case is made of one or a combination of two or more of polyoxymethylene, polyvinyl chloride, polypropylene, polyamide, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, and polyester resin. Preferably, the plastic shell is made of polyoxymethylene or polyvinyl chloride.

Referring to fig. 6 and 7, the laminated high-capacity lithium battery of the present invention further includes a battery outer casing 5 and a battery upper cover plate 6, the terminal 3, all the cell bodies 1 and the soaking pipes are disposed in the inner cavity of the battery outer casing 5, the battery outer casing 5 is a rectangular tubular structure with an open top, the battery upper cover plate 6 is disposed at the open top of the battery outer casing 5, the battery upper cover plate 6 is fixedly connected with the upper end face of the battery outer casing 5, one end of the heat pipe 11 is inserted into the insertion hole 302, and the other end of the heat pipe 11 penetrates through the battery upper cover plate 6 and extends to the upper side of the battery upper cover plate 6 and is in contact connection with the semiconductor refrigerator 12; the pole 3 penetrates through the upper battery cover 6 and extends above the upper battery cover 6.

Preferably, the battery upper cover plate 6 of the present invention is welded or bonded to the upper end surface of the battery case 5 by an adhesive.

The utility model discloses be provided with the pressure release mouth on battery upper cover plate 6, locate to install the pressure release subassembly at pressure release mouth.

Preferably, the pressure relief assembly is a pressure relief membrane or valve.

Further preferred relief valves are spring-loaded or diaphragm-type relief valves.

The utility model discloses be provided with apron card platform 304 at utmost point post 3's top, apron card platform 304 and utmost point post 3 fixed connection are provided with the joint groove on battery upper cover plate 6, and apron card platform 304 joint is with utmost point post 3 and 6 fixed connection of battery upper cover plate in the joint inslot.

Preferably, the utility model discloses be provided with C type insulating seal circle 8 in the joint department in apron ka tai 304 and joint groove.

Preferably, the utility model discloses be provided with radiating fin on battery case body 6. The heat generated in the battery can be dissipated through the heat dissipation fins.

Preferably, the utility model discloses be provided with sealing rubber ring 7 between the contact surface of apron ka tai 304 and battery upper cover plate 6, seal between battery upper cover plate 6 and battery case body 5 through sealing rubber ring 7, prevent that the electrolyte in the battery case body 5 from spilling.

Preferably, the utility model discloses a C type insulating seal circle 8 and seal rubber ring 7 are rubber material or plastics material.

The utility model is provided with a heat pipe panel 10 on the top of the battery upper cover plate 6, a heat pipe 11 runs through the heat pipe panel 10, and the heat pipe 11 is fixedly connected with the battery upper cover plate 6 through the heat pipe panel 10; the cover clip 304 extends through the heat pipe panel 10 and extends above the heat pipe panel 10; be provided with utmost point post wiring hole 303 on apron card platform 304, utmost point post wiring hole 303 is for running through the through-hole of apron card platform 304 up end and apron card platform 304 lower terminal surface, and utmost point post wiring hole 303 hole bottom contacts with utmost point post 3. Preferably, the present invention is provided with an insulating pad 9 between the heat pipe panel 10 and the battery upper cover 6.

Referring to fig. 14, the utility model discloses pressure relief vent top is provided with gas treatment device, and the pressure relief vent passes through pressure relief subassembly and gas treatment device intercommunication. The gas treatment device comprises a containing box body, a pressure relief gas inlet 14 is formed in the bottom of the containing box body, a residual gas outlet 17 is formed in the top of the containing box body, and a cooling adsorption layer is arranged in an inner cavity of the containing box body.

Preferably, the cooling adsorbed layer of the utility model comprises a cooling layer 15 and an adsorbed layer 16 which are arranged from bottom to top along the gas flowing direction. The cooling layer 15 is one or a combination of two or more of ceramic balls, honeycomb ceramic pieces, porous ceramics and graphite rods. The adsorption layer 16 is one or a combination of two or more of activated carbon, porous silica, molecular sieve, porous ceramic and adsorption resin. And a collecting bag is arranged at the residual gas outlet 17 and is used for collecting residual gas after cooling and adsorption.

The assembly method of the laminated high-capacity lithium battery in the embodiment comprises the following steps: fixing the soaking pipe or the soaking row in the mounting groove 301; dividing and grouping the cell bodies 1, fixing a plurality of cell bodies 1 in the same group by a cell group pressing shell 4 to form a battery module, or fixing a plurality of cell bodies 1 in the same group by a clamping plate and limiting to form a battery module, connecting the cell bodies 1 in the same group by a positive pole column and a negative pole column, binding a conduit lifting wire on a pull ring of each cell body 1, connecting the conduit on each cell body 1 in series, arranging the positive pole column, the negative pole column and the battery module in an inner cavity of a battery shell body 5, covering a battery upper cover plate 6, passing the conduit lifting wire through a pressure relief port on the battery upper cover plate 6, clamping the battery upper cover plate 6 with the positive pole column and the negative pole column, fixedly connecting the battery upper cover plate 6 with an upper end surface of the battery shell body 5, pulling the conduit lifting wire to separate the pull ring from the conduit 101, thereby communicating the interior of the cell bodies 1 with the inner cavity of the battery shell body 5, electrolyte is shared to the inner chambers of a plurality of electric core bodies 1 and the battery outer shell 5, and after the inner chamber of the battery outer shell 5 is vacuumized, electrolyte is filled into the inner chamber of the battery outer shell 5, and after the electrolyte is filled, a pressure relief assembly is installed at a pressure relief opening.

The specific battery cell body 1 can be divided into three groups, namely a group A, a group B and a group C, wherein the group A has a capacity range of 40-40.5 Ah, an internal resistance range of 0.9-1 m omega, a self-discharge range of 2% per month and a voltage range of 3.2 +/-0.1V; the group B has a capacity range of 39.5-40 Ah, an internal resistance range of 1-1.1 m omega, a self-discharge range of 2-4% per month and a voltage range of 3.2 +/-0.01V; group C has a capacity of 39.5Ah or less or 40.5 or more, an internal resistance of 0.9 mO or less or 1.1 mO or more, a self-discharge range of 4% or more per month, and a voltage range of 3.2 + -0.01V or less. During assembly, group A and group A are assembled, group B and group B are assembled, and group C is eliminated.

Referring to fig. 13, the utility model discloses a lamination formula large capacity lithium cell is when carrying out cluster/parallel connection each other, can connect utmost point post 3 between two adjacent lamination formula large capacity lithium through electrically conductive aluminium row, electrically conductive aluminium row is by 1 layer, 2 layers, 3 layers, more layers bars form conducting strip 13 forms even, be provided with fusible metal weak groove 1301 on bars form conducting strip 13, can appear thermal runaway in certain battery inside through fusible metal weak groove 1301, fuse through fusible metal weak groove 1301, protect normal work's battery.

It should be noted that the other fusible parts such as the fusible alloy part or the fusible metal weak groove of the present invention are made of alloy material, specifically, tin-lead alloy, tin-bismuth alloy or lead-bismuth alloy.

The above is a further detailed description of the present invention, and not intended to limit the present invention to the particular preferred embodiments, and it will be understood by those skilled in the art that various changes, substitutions, and alterations can be made without departing from the spirit and scope of the present invention, and any such changes, substitutions, improvements, and equivalents as fall within the spirit and scope of the present invention as defined by the appended claims.

Claims (32)

1. The utility model provides a laminated large capacity lithium cell, its characterized in that, includes utmost point post and a plurality of electric core body, and a plurality of electric core bodies pass through utmost point post parallelly connected, be provided with thermal conductivity component and refrigeration/heating element on the utmost point post, refrigeration/heating element refrigerates or heats a plurality of electric core bodies through thermal conductivity component.

2. The laminated high-capacity lithium battery as claimed in claim 1, wherein a tab is connected to the cell body, one end or two ends of the tab extend outwards to form a tab folded edge, and the tab is connected to the terminal post through the tab folded edge.

3. The laminated large capacity lithium battery of claim 2 wherein the tab flange has a width greater than the width of the tab.

4. The laminated high-capacity lithium battery as claimed in claim 3, wherein the case of the cell body is provided with a protruding conduit, the conduit is sealed, the conduit is connected with a pull ring, and the side wall of the conduit is provided with a weak groove.

5. The laminated large-capacity lithium battery as claimed in claim 4, wherein the terminal post is provided with a plurality of mounting grooves, the mounting grooves are arranged along the length direction of the terminal post, the heat conducting assembly is arranged in the mounting grooves, and the heat conducting assembly is in contact with the plurality of cell bodies.

6. The laminated large capacity lithium battery of claim 5 wherein the heat conducting component is a soaking tube or a soaking bar.

7. The laminated large capacity lithium battery of claim 6 wherein the top of the terminal post is provided with a socket on one or both sides for receiving a cooling/heating assembly.

8. The laminated, high capacity lithium battery of claim 7 wherein the cooling/heating assembly comprises a heat pipe and a heating rod, both of which are disposed within the receptacle.

9. The laminated large capacity lithium battery of claim 8 wherein the cooling/heating assembly further comprises a semiconductor cooler, the semiconductor cooler being coupled to the heat pipe.

10. The laminated large capacity lithium battery of claim 9 wherein the semiconductor refrigerator is placed above the battery body.

11. The laminated large-capacity lithium battery as claimed in claim 9 or 10, wherein the top of the terminal post is provided with a fixing groove, and a heating plate and a soaking bar are arranged in the fixing groove, and the soaking bar is connected with a semiconductor refrigerator.

12. The laminated large-capacity lithium battery as claimed in claim 9 or 10, wherein the inside of the electrode post is a hollow structure, the hollow structure is a vacuum cavity, the hollow structure is filled with a heat-conducting fire extinguishing medium, the electrode post is provided with a fusible alloy member, and the fusible alloy member has a melting point of more than 130 ℃.

13. The laminated, high capacity lithium battery of claim 12 wherein the thermally conductive fire extinguishing medium is water, perfluorohexanone, or a halogenated alkane.

14. The laminated large capacity lithium battery of claim 13 wherein a plurality of layers of screen mesh are arranged within the hollow structure to form capillary holes, the capillary holes being arranged along the length of the terminal.

15. The laminated high-capacity lithium battery of claim 14 wherein the terminal is a ladder-like terminal or a wedge-like terminal having a large top cross-sectional area and a small bottom cross-sectional area.

16. The laminated large-capacity lithium battery according to claim 2 or 3, wherein the tabs comprise a positive tab and a negative tab, the positive tab and the negative tab are respectively disposed on two opposite sides of the battery cell body, the positive tab is an aluminum plate, and the negative tab is a copper-aluminum composite plate.

17. The laminated high capacity lithium battery of claim 16 wherein the casing of the cell body is a plastic casing.

18. The laminated, high capacity lithium battery of claim 17 wherein the plastic shell has a melting point greater than 130 ℃.

19. The laminated high-capacity lithium battery of claim 15, further comprising a battery case and a battery upper cover plate, wherein the terminal post, the plurality of cell bodies and the soaking pipe are all disposed in an inner cavity of the battery case, and the battery upper cover plate is disposed at a top opening of the battery case; the heat pipe penetrates through the upper cover plate of the battery and extends to the upper part of the upper cover plate of the battery to be connected with the semiconductor refrigerator; the pole column penetrates through the upper cover plate of the battery and extends to the upper part of the upper cover plate of the battery.

20. The laminated high-capacity lithium battery as claimed in claim 19, wherein the top of the electrode post is provided with a cover plate clamping platform, the battery upper cover plate is provided with a clamping groove, and the cover plate clamping platform is clamped in the clamping groove.

21. The laminated large-capacity lithium battery as claimed in claim 20, wherein a heat pipe panel is provided on the top of the battery upper cover plate, and the heat pipe penetrates through the heat pipe panel and is fixedly connected with the battery upper cover plate through the heat pipe panel; the cover plate clamping table penetrates through the heat pipe embedding plate and extends to the upper part of the heat pipe embedding plate; and the top of the pole is provided with a pole wiring hole.

22. The laminated large-capacity lithium battery as claimed in claim 21, wherein a C-shaped insulating sealing ring is provided on a contact surface of the clamping groove of the battery upper cover plate and the cover plate clamping table.

23. The laminated, high capacity lithium battery of claim 22 wherein an insulating gasket is disposed between the heat pipe panel and the battery top cover, the insulating gasket having an opening, the top of the C-shaped insulating gasket extending through the opening and over the opening.

24. The laminated, high capacity lithium battery of claim 23 wherein the heat pipe panel and the post compress the C-shaped insulating gasket.

25. The laminated, high capacity lithium battery of claim 24 wherein the battery case body has fins disposed thereon.

26. The laminated, high capacity lithium battery of claim 25 wherein the battery top cover plate has a pressure relief vent disposed therein, the pressure relief vent having a pressure relief assembly disposed therein.

27. The laminated, high capacity lithium battery of claim 26 wherein the pressure relief assembly is a pressure relief membrane or valve.

28. The laminated, high capacity lithium battery of claim 27 wherein the pressure relief valve is a spring loaded pressure relief valve or a diaphragm pressure relief valve.

29. The laminated high capacity lithium battery of claim 28 wherein a gas handling device is disposed above the pressure relief vent, the pressure relief vent being in communication with the gas handling device through a pressure relief assembly.

30. The laminated large-capacity lithium battery according to claim 29, wherein the gas processing device comprises a containing box body, the bottom of the containing box body is provided with a pressure relief gas inlet, the top of the containing box body is provided with a residual gas outlet, and an inner cavity of the containing box body is provided with a cooling adsorption layer.

31. The laminated large-capacity lithium battery as claimed in claim 30, wherein the cooling adsorption layer comprises a cooling layer and an adsorption layer sequentially arranged from bottom to top in a gas flow direction.

32. The laminated large-capacity lithium battery as claimed in claim 31, wherein the residual gas outlet is provided with a collecting bag for collecting residual gas after cooling adsorption.

Images