Prismatic battery cell

Abstract

A prismatic cell has a first electrode stack, a second electrode stack, and a thermal barrier disposed between the first electrode stack and the second electrode stack. The first electrode stack has a first anode, a first cathode, and a first separator disposed between the first anode and the first cathode. The second electrode stack has a second anode, a second cathode, and a second separator disposed between the second anode and the second cathode. The first electrode stack, the thermal barrier, and the second electrode stack form a first cell or stack assembly. The first stack assembly is disposed inside a housing containing an electrolyte.

Description

Technical Field

[0001] The present disclosure relates to a prismatic battery cell, and more particularly to a prismatic battery cell with a thermal management function. Background Art

[0002] A rechargeable energy storage system (RESS, such as a prismatic battery) typically includes multiple electrode stacks. Each electrode stack includes an anode and a cathode separated by an electrically insulating separator material. The electrode stacks are typically placed adjacent to each other in a housing or shell to protect the electrode stacks from the surrounding environment. The housing is also used to contain an electrolyte within the housing and around the electrode stacks. Electrode stacks in RESS may experience uncontrolled thermal events, namely thermal runaway propagation (TRP). In a TRP event, an electrode that experiences uncontrolled thermal runaway (called a trigger electrode) may cause an increase in the temperature of an adjacent electrode stack. An increase in the temperature of one or more electrode stacks may cause an increase in the temperature and pressure of the entire RESS. An increase in pressure and temperature in the RESS due to the generation of gas may cause the seal of the RESS housing to leak.

[0003] Although methods and systems for managing or controlling TRP events exist in the prior art and can achieve their specific purposes, a new and improved RESS is still needed. Therefore, a prismatic battery cell assembly having multiple electrode stacks configured to control TRP events is needed. Summary of the invention

[0004] According to several aspects of the present disclosure, a prismatic battery is provided. The prismatic battery has: a first electrode stack having a first anode, a first cathode, and a first separator disposed between the first anode and the first cathode; a second electrode stack having a second anode, a second cathode, and a second separator disposed between the second anode and the second cathode; and a thermal barrier disposed between the first electrode stack and the second electrode stack. The first electrode stack, the thermal barrier, and the second electrode stack form a first stack assembly. The prismatic battery also includes a housing for accommodating an electrolyte. The first stack assembly is disposed inside the housing and immersed in the electrolyte.

[0005] According to another aspect of the present disclosure, the prismatic battery further includes an insulation tape wrapped around the first stack assembly, wherein the insulation tape has a first surface and a second surface, wherein an adhesive is disposed on one of the first surface and the second surface for adhering the insulation tape to the first stack assembly.

[0006] According to another aspect of the present disclosure, the prismatic battery further includes a first thermal insulation sheet disposed on the first side of the first stack assembly.

[0007] According to another aspect of the present disclosure, the prismatic battery also includes an insulation belt wrapped around a first insulation sheet disposed on a first side of a first stack assembly, wherein the insulation belt has a first surface and a second surface, wherein an adhesive is disposed on one of the first surface and the second surface for adhering the insulation belt to the first stack assembly, thereby fixing the first insulation sheet to the first stack assembly.

[0008] According to another aspect of the present disclosure, the prismatic battery further includes a second thermal insulation sheet disposed on a second side of the first stack assembly.

[0009] According to another aspect of the present disclosure, the prismatic battery also includes an insulation belt, which is wrapped around a first insulation sheet arranged on a first side of the first stack component and a second insulation sheet arranged on a second side of the first stack component, wherein the insulation belt has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the insulation belt to the first stack component, thereby fixing the first insulation sheet and the second insulation sheet to the first stack component.

[0010] According to another aspect of the present disclosure, the prismatic battery further includes a third thermal insulation sheet disposed on a third side of the first stack assembly.

[0011] According to another aspect of the present disclosure, the prismatic battery also includes an insulation belt, which is wrapped around a first insulation sheet arranged on a first side of the first stack component, a second insulation sheet arranged on a second side of the first stack component, and a third insulation sheet arranged on a third side of the first stack component, wherein the insulation belt has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the insulation belt to the first stack component, thereby fixing the first insulation sheet, the second insulation sheet and the third insulation sheet to the first stack component.

[0012] According to another aspect of the present disclosure, the prismatic battery further includes a fourth thermal insulation sheet disposed on a fourth side of the first stack assembly.

[0013] According to another aspect of the present disclosure, the prismatic battery also includes an insulation belt, which is wrapped around a first insulation sheet arranged on a first side of a first stack component, a second insulation sheet arranged on a second side of the first stack component, a third insulation sheet arranged on a third side of the first stack component, and a fourth insulation sheet arranged on a fourth side of the first stack component, wherein the insulation belt has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the insulation belt to the first stack component, thereby fixing the first insulation sheet, the second insulation sheet, the third insulation sheet and the fourth insulation sheet to the first stack component.

[0014] According to another aspect of the present disclosure, the prismatic battery further includes: a first sheet protruding from the first anode and a second sheet protruding from the second anode, wherein the first sheet and the second sheet are made of copper; and a third sheet protruding from the first cathode and a fourth sheet protruding from the second cathode, wherein the third sheet and the fourth sheet are made of aluminum.

[0015] According to another aspect of the present disclosure, a prismatic battery includes: a first electrode stack having a first anode, a first cathode, and a first separator disposed between the first anode and the first cathode; a second electrode stack having a second anode, a second cathode, and a second separator disposed between the second anode and the second cathode; and a thermal barrier disposed between the first electrode stack and the second electrode stack. The first electrode stack, the thermal barrier, and the second electrode stack form a first stack assembly. The prismatic battery also includes: a first thermal insulation sheet disposed on a first side of the first stack assembly, and a housing containing an electrolyte. The first stack assembly is disposed inside the housing and immersed in the electrolyte.

[0016] According to another aspect of the present disclosure, the prismatic battery further includes an insulation tape wrapped around the first stack assembly and the first insulation sheet, wherein the insulation tape has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the insulation tape to the first stack assembly and fixing the first insulation sheet to the first stack assembly.

[0017] According to another aspect of the present disclosure, the prismatic battery further includes a second thermal insulation sheet disposed on a second side of the first stack assembly.

[0018] According to another aspect of the present disclosure, the prismatic battery also includes an insulation belt, which is wrapped around a first insulation sheet arranged on a first side of the first stack component and a second insulation sheet arranged on a second side of the first stack component, wherein the insulation belt has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the insulation belt to the first stack component, thereby fixing the first insulation sheet and the second insulation sheet to the first stack component.

[0019] According to another aspect of the present disclosure, the prismatic battery further includes a third thermal insulation sheet disposed on a third side of the first stack assembly.

[0020] According to another aspect of the present disclosure, the prismatic battery also includes an insulation belt, which is wrapped around a first insulation sheet arranged on a first side of the first stack component, a second insulation sheet arranged on a second side of the first stack component, and a third insulation sheet arranged on a third side of the first stack component, wherein the insulation belt has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the insulation belt to the first stack component, thereby fixing the first insulation sheet, the second insulation sheet and the third insulation sheet to the first stack component.

[0021] According to another aspect of the present disclosure, the prismatic battery further includes a fourth thermal insulation sheet disposed on a fourth side of the first stack assembly.

[0022] According to another aspect of the present disclosure, the prismatic battery also includes an insulation belt, which is wrapped around a first insulation sheet arranged on a first side of a first stack component, a second insulation sheet arranged on a second side of the first stack component, a third insulation sheet arranged on a third side of the first stack component, and a fourth insulation sheet arranged on a fourth side of the first stack component, wherein the insulation belt has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the insulation belt to the first stack component, thereby fixing the first insulation sheet, the second insulation sheet, the third insulation sheet and the fourth insulation sheet to the first stack component.

[0023] According to another aspect of the present disclosure, the prismatic battery also includes: a first electrode stack having a first anode, a first cathode, and a first separator disposed between the first anode and the first cathode; a second electrode stack having a second anode, a second cathode, and a second separator disposed between the second anode and the second cathode; a thermal barrier disposed between the first electrode stack and the second electrode stack, wherein the first electrode stack, the thermal barrier, and the second electrode stack form a first stack assembly; a first thermal insulation sheet disposed on a first side of the first stack assembly; a second thermal insulation sheet disposed on a second side of the first stack assembly; a third thermal insulation sheet disposed on a third side of the first stack assembly; a fourth thermal insulation sheet disposed on a fourth side of the first stack assembly; and an insulating belt wound around the first thermal insulation sheet disposed on the first side of the first stack assembly, the second thermal insulation sheet disposed on the second side of the first stack assembly, the third thermal insulation sheet disposed on the third side of the first thermal insulation sheet stack assembly, and the fourth thermal insulation sheet disposed on the fourth side of the first stack assembly. The heat insulating tape has a first surface and a second surface, wherein an adhesive is disposed on one of the first surface and the second surface for adhering the heat insulating tape to the first stack assembly, thereby fixing the first heat insulating sheet, the second heat insulating sheet, and the third heat insulating sheet to the first stack assembly. The prismatic battery also includes a housing for accommodating an electrolyte. The first stack assembly is disposed inside the housing and immersed in the electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

[0025] Figure 1A and Figure 1B is a perspective view of a prismatic battery cell assembly shown in accordance with the present disclosure;

[0026] Figure 2 is a perspective view of an alternative battery assembly having a first electrode stack and a second electrode stack separated by a thermal barrier according to the present disclosure;

[0027] Figure 3 is a perspective view of another alternative battery assembly according to the present disclosure, the battery assembly having a thermal insulation sheet positioned on top of and covering the electrode stack and thermal barrier;

[0028] Figure 4 is a perspective view of yet another alternative battery assembly according to the present disclosure having a first thermal insulation sheet positioned on top of and covering the electrode stack and thermal barrier, and a second thermal insulation sheet positioned below and covering the bottom of the electrode stack and thermal barrier;

[0029] Figure 5 is a perspective view of yet another alternative battery assembly according to the present disclosure, the battery assembly having a first electrode stack and a second electrode stack separated by a thermal barrier, and further comprising first, second, third, and fourth thermal insulation sheets surrounding the electrode stacks and the thermal barrier; and

[0030] Figure 6 is a graph showing the effect on temperature of an electrode stack assembled in an assembly constructed in accordance with the present disclosure compared to an electrode stack assembled in an assembly constructed in accordance with the present disclosure. DETAILED DESCRIPTION

[0031] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.

[0032] Now refer to Figure 1A and Figure 1B , shows a perspective view of a prismatic cell 10 having a housing or casing 12 , electrode stacks 14 , 16 , and a thermal barrier 18 according to the present disclosure. Figure 1A The housing or shell 12 is schematically shown having a first side wall 20, a second side wall 22, a third side wall 24, a bottom side wall 26, a top side wall (not shown), and a front side wall (not shown). The present disclosure contemplates other housing configurations for the housing or shell 12 and is not limited to Figure 1A The exemplary housing shown. In addition, the housing 12 contains a suitable electrolyte. For example, the electrolyte is a liquid solution of an organic solvent and a lithium salt. The electrode stacks 14 and 16 are immersed in the electrolyte contained in the housing 12.

[0033] Continue to refer Figure 1A and Figure 1B, shows a perspective view of electrode stacks 14 and 16 and thermal barriers 18 forming a battery or stack assembly 28 according to the present disclosure. The electrode stack 14 consists of a negative electrode or anode electrode 30, a separator 32, and a positive electrode or cathode electrode 34. The anode electrode 30 is typically a thin metal plate that includes an electrode sheet 36 for providing an electrical connection between the anode electrode 30 and a terminal (not shown) on the outside of the housing. Similarly, the cathode electrode 34 is a thin metal plate that includes an electrode sheet 38 for providing an electrical connection between the cathode electrode 34 and another terminal (not shown) on the outside of the housing. The electrode sheets 36, 38 serve as current collectors. The voltage generated between the anode electrode 30 and the cathode electrode 34 is transmitted to an external device (not shown) through the terminals on the housing 12. For example, the anode electrode 30 and the electrode sheet 36 are made of copper or other suitable materials and are typically coated with graphite or graphite / silicon or other carbon-based materials or silicon oxide or lithiated silicon. For example, cathode electrode 34 and electrode sheet 38 are made of aluminum or other suitable material and are typically coated with a metal oxide such as lithium cobalt oxide (LCO) or nickel cobalt aluminum (NCA) or lithium iron / manganese phosphate (LFP / LFMP) or lithium rich manganese (LMR).

[0034] The different metals (copper anode 30 and aluminum cathode 34) of the prismatic battery 10 produce a galvanic reaction in the battery 10. Copper (e.g., anode electrode 30) and aluminum (e.g., cathode electrode 34) have different standard reduction potentials, are connected to an external circuit, and are separated from each other by a separator 32. The aluminum, which has a lower potential, will oxidize and release electrons, while the copper, which has a higher potential, will reduce and accept electrons. This process of releasing and accepting electrons will produce an electric current that can be used to power a device.

[0035] The separator 32 is generally a thin porous film or material layer that is located between the anode electrode 30 and the cathode electrode 34 and prevents short circuits caused by contact between the anode and the cathode. The separator 32 allows lithium ions to pass through and complete the circuit. Porous and chemically stable composite materials such as composite materials made of polyethylene (PE), polypropylene (PP) or other natural materials can be used as separators 32. In addition, inorganic nanoparticles such as TiO2, SiO2, Al2O3 and ZrO2 can also be used to produce coating composite materials for separators 32. The separator 32 increases the internal resistance of the prismatic battery 10, which reduces the power output and efficiency of the battery. The internal resistance depends on the thickness, porosity and composition of the separator 32. Preferably, thinner, more porous and more conductive separators can reduce resistance and improve the performance of the battery 10. The separator 32 is also selected to withstand high temperatures and manage thermal runaway, preventing uncontrollable increases in temperature due to exothermic reactions. In addition, the separator 32 has a high melting point and low shrinkage to avoid contact between the anode electrode 30 and the cathode electrode 34. The separator 32 has sufficient mechanical strength to resist puncture, tearing or deformation during manufacture and operation of the battery assembly 28. The separator 32 is also dimensionally stable and flexible, conforming to the shape of the electrodes 30, 34 and accommodating volume changes during cycling. The separator 32 is chemically inert and compatible with the electrolyte, electrodes 30, 34 and other battery components. In addition, the separator 32 has a low affinity for water or other impurities that can contaminate the electrolyte or cause corrosion of the electrodes 30, 34.

[0036] Similar to the electrode stack 14, the electrode stack 16 is composed of an anode electrode 40, a separator 42, and a cathode electrode 44. Although only one anode electrode 40 and one cathode electrode 44 separated by a separator 42 are shown in the drawings, the present disclosure contemplates that the arrangement of the anode electrode 40 and the cathode electrode 44 separated by the separator 42 can be repeated multiple times (i.e., ten to a hundred times or even more) in each electrode stack 14, 16. The anode electrode 40 includes an electrode sheet (not shown) for providing an electrical connection to the anode electrode 40. Similarly, the cathode electrode 44 includes an electrode sheet 48 for providing an electrical connection to the cathode electrode 44. The electrode stack 16 also includes a separator 42 disposed between the anode electrode 40 and the cathode electrode 44. The separator 42 has the same construction and composition as described above with respect to the separator 32.

[0037] Continue to refer Figure 1B, the thermal barrier 18 is disposed or positioned between the electrode stack 14 and the electrode stack 16. The thermal barrier 18 is an insulating material that is configured to prevent heat transfer from one stack to another. For example, the thermal barrier 18 is a synthetic porous ultralight material derived from a gel, wherein the liquid component of the gel has been replaced by a gas. The resulting material is called an aerogel, which is a solid with extremely low density and extremely low thermal conductivity. The aerogel of the thermal barrier 18 can be made of a variety of compounds, such as polymer-based aerogels that have the appearance and feel of rigid foam. The air volume content of the aerogel material ranges from 50% to 99.98%. The aerogel of the thermal barrier 18 has a porous solid network containing air pockets, wherein the air pockets occupy most of the space within the thermal barrier 18. The aerogel of the thermal barrier 18 prevents both conduction and convection modes of heat transfer. In addition, to prevent the electrolyte solution from penetrating the thermal barrier 18, the thermal barrier 18 is wrapped in a suitable non-ion permeable barrier, such as a polymer with laminated aluminum. Alternatively, the thermal barrier 18 may be encapsulated or overmolded in an aluminum laminate plastic (i.e., PET film) to prevent the electrolyte solution from penetrating the thermal barrier 18. Although only one thermal barrier 18 is shown with electrode stacks 14, 16 on either side of the thermal barrier 18, the present disclosure contemplates multiple thermal barriers 18 disposed between multiple electrode stacks 14, 16 all contained within a casing 12 to form a prismatic battery 10.

[0038] Reference now Figure 2 , which shows a perspective view of an alternating battery or stack assembly 100 having an electrode stack 14 and an electrode stack 16 separated by a thermal barrier 18 according to the present invention. The electrode stacks 14, 16 and the thermal barrier 18 have the same components as described above, wherein the same components are represented by the same reference numerals. The battery assembly 100 also includes an insulating belt 52 wrapped around the outside of the electrode stacks 14, 16 and the thermal barrier 18. The insulating belt 52 has a first side 54 and a second side 56. The second side 56 is coated with a suitable adhesive and faces the outer surface of the electrode stacks 14, 16 and the thermal barrier 18. The insulating belt 52 with an adhesive coating is used to hold the battery assembly 100 together to form a single unit or assembly. In addition, the insulating belt 52 is made of a material that inhibits heat transfer or heat conduction from the electrode stacks 14, 16 to components outside the electrode stacks 14, 16. The insulating belt 52 is made of mica or other suitable non-thermally conductive material. For example, suitable mica tapes may include inorganic high dielectric tapes made from mica paper and laminated to reinforcing substrates such as woven and nonwoven glass cloth, nonwoven polyester mesh, and / or polyester films including polyimide. Mica tape sold by Goode EIS in Wujiang District, Suzhou City, Jiangsu Province is an example of a suitable insulation tape 52. Although Figure 2 While shown as a single tape loop or wrap around the electrode stacks 14 , 16 and thermal barrier 18 , the present disclosure contemplates multiple tape loops or wraps around the electrode stacks 14 , 16 and thermal barrier 18 .

[0039] Reference now Figure 3 , which shows a perspective view of another alternative battery or stack assembly 110 according to the present disclosure, having a thermal insulation sheet 60 positioned on top of and covering the electrode stacks 14, 16 and thermal barrier 18. The electrode stacks 14, 16 and thermal barrier 18 have the same components as described above, wherein the same components are represented by the same reference numerals. The thermal insulation sheet 60 is sized to cover the entire top surface of the electrode stacks 14, 16 and thermal barrier 18. For example, the thermal insulation sheet 60 can be composed of 80-90% high-grade muscovite mica or phlogopite mica paper impregnated with a high temperature resistant silicone resin or other similar composition. In addition, the thermal insulation sheet 60 is configured to have thermal properties to inhibit heat transfer or thermal conduction from the electrode stacks 14, 16. The battery assembly 110 is constructed by first placing or positioning the electrode stacks 14, 16 on either side of the thermal barrier 18, then completely or substantially covering the entire top surface of the electrode stacks 14, 16 and the thermal barrier 18 with the thermal insulation sheet 60, and then wrapping the thermal insulation tape 52 around the outside of the electrode stacks 14, 16, the thermal barrier 18, and the thermal insulation sheet 60. The thermal insulation tape 52 is as described above, wherein like parts or features are indicated by like reference numerals. The thermal insulation tape 52 having an adhesive coating is used to hold the battery assembly 110 together to form a single unit or assembly 110. Although the thermal insulation tape 52 is Figure 3 1 and 2 are shown as a single loop or wrap of tape around the electrode stacks 14 , 16 , thermal barrier 18 , and thermal insulator 60 , but the present disclosure contemplates multiple loops or wraps of tape around the electrode stacks 14 , 16 , thermal barrier 18 , and thermal insulator 60 .

[0040] Reference now Figure 4, which shows a perspective view of yet another alternative battery or stack assembly 120 according to the present disclosure, having a first thermal insulator 62 positioned on top of and covering the electrode stacks 14, 16 and thermal barrier 18, and a second thermal insulator 64 positioned below and covering the bottom of the electrode stacks 14, 16 and thermal barrier 18. The electrode stacks 14, 16 and thermal barrier 18 have the same components as described above, wherein the same components are represented by the same reference numerals. As described above, the battery assembly 120 also includes a first thermal insulator 62 disposed on top of the electrode stacks 14, 16 and thermal barrier 18, and a second thermal insulator 64 disposed below the electrode stacks 14, 16 and thermal barrier 18. The first thermal insulator 62 is sized to cover the entire top surface of the electrode stacks 14, 16 and thermal barrier 18, and the second thermal insulator 64 is sized to cover the entire bottom surface of the electrode stacks 14, 16 and thermal barrier 18. The first thermal insulation sheet 62 and the second thermal insulation sheet 64 have the same composition and structure as described above with respect to the thermal insulation sheet 60. In addition, the first thermal insulation sheet 62 and the second thermal insulation sheet 64 are configured to have thermal properties to inhibit heat transfer or heat conduction from the electrode stacks 14, 16. The battery assembly 120 is constructed as follows: first, the electrode stacks 14, 16 are placed or positioned on either side of the thermal barrier 18, and then the entire top surface of the electrode stacks 14, 16 and the thermal barrier 18 is completely or substantially covered with the first thermal insulation sheet 62, and the entire bottom surface of the electrode stacks 14, 16 and the thermal barrier 18 is completely or substantially covered with the thermal insulation sheet 64, and then the thermal insulation tape 52 is wrapped around the outside of the electrode stacks 14, 16, the thermal barrier 18 and the thermal insulation sheets 62, 64. The thermal insulation tape 52 is constructed as described above, wherein the same components or features are represented by the same figure numbers. The thermal insulation tape 52 having an adhesive coating is used to hold the battery assembly 120 together to form a single unit or assembly 120. Although the thermal insulation tape 5 is Figure 4 1 and 2. FIG. 1 shows a single loop or wrap of tape around the electrode stacks 14, 16, thermal barrier 18, and first and second thermal insulators 62, 64, but the present disclosure contemplates multiple loops or wraps of tape around the electrode stacks 14, 16, thermal barrier 18, and first and second thermal insulators 62, 64.

[0041] Reference now Figure 5, which shows a perspective view of yet another alternative battery or stack assembly 130 according to the present disclosure, having an electrode stack 14 and an electrode stack 16 separated by a thermal barrier 18, and also including a first thermal insulator 62, a second thermal insulator 64, a third thermal insulator 66, and a fourth thermal insulator 68. The electrode stacks 14, 16, and the thermal barrier 18 have the same components as described above, wherein the same components are indicated using the same reference numerals. The first thermal insulator 62 is disposed on top of the electrode stacks 14, 16, and the thermal barrier 18, the second thermal insulator 64 is disposed below the electrode stacks 14, 16, and the thermal barrier 18, the third thermal insulator 66 is disposed adjacent to the side surface of the electrode stack 14, and the fourth thermal insulator 68 is disposed adjacent to the side surface of the electrode stack 16. The first thermal insulator 62 is sized to completely or substantially cover the entire top surface of the electrode stacks 14, 16 and the thermal barrier 18, the second thermal insulator 64 is sized to completely or substantially cover the entire bottom surface of the electrode stacks 14, 16 and the thermal barrier 18, the third thermal insulator 66 is sized to completely or substantially cover the entire side surface of the electrode stack 14, and the fourth thermal insulator 68 is sized to completely or substantially cover the entire side surface of the electrode stack 16. The first thermal insulator 62, the second thermal insulator 64, the third thermal insulator 66, and the fourth thermal insulator 68 have the same composition and configuration as described above with respect to the thermal insulator 60. In addition, the first thermal insulator 62, the second thermal insulator 64, the third thermal insulator 66, and the fourth thermal insulator 68 are configured to have thermal properties to inhibit heat transfer or heat conduction from the electrode stacks 14, 16. The battery assembly 130 is constructed as follows: first, the electrode stacks 14, 16 are placed or positioned on either side of the thermal barrier 18, and then the entire top surface of the electrode stacks 14, 16 and the thermal barrier 18 is completely or substantially covered with the first thermal insulation sheet 62, the entire bottom surface of the electrode stacks 14, 16 and the thermal barrier 18 is completely or substantially covered with the second thermal insulation sheet 64, the entire side surface of the electrode stack 14 is completely or substantially covered with the third thermal insulation sheet 66, and the entire side surface of the electrode stack 16 is completely or substantially covered with the fourth thermal insulation sheet 68, and then the thermal insulation tape 52 is wrapped around the electrode stacks 14, 16, the thermal barrier 18 and the first thermal insulation sheet 62, the second thermal insulation sheet 64, the third thermal insulation sheet 66 and the fourth thermal insulation sheet 68. The thermal insulation tape 52 is constructed as described above, wherein the same components or features are represented by the same figure numbers. The thermal insulation tape 52 having an adhesive coating is used to hold the battery assembly 130 together to form a single unit or assembly 130. Although the thermal insulation tape 52 is Figure 5 While shown as a single loop or wrap around the electrode stack 14, 16, thermal barrier 18, and first, second, third, 66, and fourth thermal insulators 62, 64, 66, and 68, the present disclosure contemplates multiple loops or wraps around the electrode stack 14, 16, thermal barrier 18, and first, second, third, 66, and fourth thermal insulators 62, 64, 66, and 68.

[0042] Reference now Figure 6 , a graph 200 shows the effect of temperature over time for an electrode stack 14 or 16 having features of the present disclosure constructed as described above, and the temperature increase experienced compared to an electrode stack that does not include a thermal barrier 18 or thermal insulation sheet 60 or 62, 64, 66 and 68. The y-axis 202 of the graph 200 is temperature, and the x-axis 204 of the graph 200 is time. In addition, the graph 200 includes a temperature versus time curve (depicted by line 206) for an adjacent electrode stack (not shown herein) that does not have a thermal barrier 18 for separating the adjacent electrode stack (not shown). In addition, for the electrode stack 14 (described above), the temperature versus time curve is depicted by line 208, which is positioned adjacent to the adjacent electrode stack (electrode stack 16) that has a thermal barrier 18 separating the stack to form, for example: one of the battery assemblies 28, 100, 110, 120 and 130 (described above). It is not difficult to see that the electrode stack assembled with another electrode stack and the thermal barrier 18 therebetween has a lower temperature rise over time than the electrode stack not adjacent to the thermal barrier 18 or assembled with the thermal barrier 18. In addition, the adjacent electrode stack, such as the electrode stack 16 (as described above with respect to one of the battery assemblies 28, 100, 110, 120 and 130) also has a lower temperature rise over time as shown by line 210 compared to the electrode stack not assembled adjacent to the thermal barrier 18 as shown by line 212.

[0043] This description is merely illustrative in nature and is in no way intended to limit the present disclosure, its application or use. The broad teachings of the present disclosure can be implemented in many forms. Therefore, although the present disclosure includes specific examples, the true scope of the present disclosure should not be so limited, because other modifications will become apparent after studying the drawings, description and appended claims.

Claims

1. A prismatic battery comprising: a first electrode stack having a first anode, a first cathode, and a first separator disposed between the first anode and the first cathode; a second electrode stack having a second anode, a second cathode, and a second separator disposed between the second anode and the second cathode; a thermal barrier disposed between the first electrode stack and the second electrode stack, wherein the first electrode stack, the thermal barrier and the second electrode stack form a first stack assembly; and A housing including an electrolyte, wherein the first stack assembly is disposed inside the housing and immersed in the electrolyte.

2. The prismatic battery of claim 1, further comprising an insulating tape wrapped around the first stack assembly, wherein: The insulation tape has a first surface and a second surface, wherein an adhesive is disposed on one of the first surface and the second surface for adhering the insulation tape to the first stack assembly. 3 . The prismatic battery of claim 1 , further comprising a first thermal barrier disposed on a first side of the first stack assembly.

4. The prismatic battery of claim 3, further comprising a heat insulating tape wrapped around a first heat insulating sheet disposed on a first side of the first stack assembly, wherein: The thermal insulation tape has a first surface and a second surface, wherein an adhesive is disposed on one of the first surface and the second surface for adhering the thermal insulation tape to the first stack assembly, thereby fixing the first thermal insulation sheet to the first stack assembly.

5. The prismatic battery of claim 3, further comprising a second thermal barrier disposed on a second side of the first stack assembly.

6. The prismatic battery according to claim 5, further comprising an insulation belt wound around a first insulation sheet disposed on a first side of the first stack assembly and a second insulation sheet disposed on a second side of the first stack assembly, wherein: The heat insulating tape has a first surface and a second surface, wherein an adhesive is disposed on one of the first surface and the second surface for adhering the heat insulating tape to the first stack assembly, thereby fixing the first heat insulating sheet and the second heat insulating sheet to the first stack assembly. 7 . The prismatic battery of claim 5 , further comprising a third thermal barrier sheet disposed on a third side of the first stack assembly.

8. The prismatic battery according to claim 6, further comprising an insulation belt wound around a first insulation sheet disposed on a first side of the first stack assembly, a second insulation sheet disposed on a second side of the first stack assembly, and a third insulation sheet disposed on a third side of the first stack assembly, wherein The thermal insulation belt has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the thermal insulation belt to the first stack assembly, thereby fixing the first thermal insulation sheet, the second thermal insulation sheet and the third thermal insulation sheet to the first stack assembly.

9. The prismatic battery of claim 7, further comprising a fourth thermal barrier sheet disposed on a fourth side of the first stack assembly.

10. The prismatic battery according to claim 9, further comprising an insulation belt, the insulation belt being wound around a first insulation sheet disposed on a first side of the first stack assembly, a second insulation sheet disposed on a second side of the first stack assembly, a third insulation sheet disposed on a third side of the first stack assembly, and a fourth insulation sheet disposed on a fourth side of the first stack assembly, wherein The thermal insulation belt has a first surface and a second surface, wherein an adhesive is provided on one of the first surface and the second surface for adhering the thermal insulation belt to the first stack assembly, thereby fixing the first thermal insulation sheet, the second thermal insulation sheet, the third thermal insulation sheet and the fourth thermal insulation sheet to the first stack assembly.

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