CN220106676U - Battery case and lithium ion battery - Google Patents
Battery case and lithium ion battery Download PDFInfo
- Publication number
- CN220106676U CN220106676U CN202321635288.0U CN202321635288U CN220106676U CN 220106676 U CN220106676 U CN 220106676U CN 202321635288 U CN202321635288 U CN 202321635288U CN 220106676 U CN220106676 U CN 220106676U
- Authority
- CN
- China
- Prior art keywords
- retardant
- flame
- explosion
- battery
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 56
- 239000003063 flame retardant Substances 0.000 claims abstract description 119
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000000126 substance Substances 0.000 claims abstract description 39
- 238000004804 winding Methods 0.000 claims description 38
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 230000004308 accommodation Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a battery shell and a lithium ion battery, which belong to the technical field of lithium batteries, wherein the battery shell comprises a shell body and a flame-retardant component, the flame-retardant component comprises a body, a first explosion-proof valve and a flame-retardant substance, the body is arranged on the inner side wall of the shell body, a flame-retardant cavity is formed in the body, and the body is provided with an explosion-proof hole communicated with the interior of the body; the first explosion-proof valve is installed in the explosion-proof hole, the first explosion-proof valve is configured to be opened when the gas pressure in the shell is larger than a first preset opening pressure, the flame-retardant substance is arranged in the flame-retardant cavity, and the flame-retardant substance can be discharged out of the flame-retardant cavity through the opened first explosion-proof valve so as to be dispersed in the shell. The battery shell and the lithium ion battery provided by the utility model have higher safety, and the overall performance of the lithium ion battery is not affected.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a battery shell and a lithium ion battery.
Background
When the high-capacity lithium ion battery is charged and discharged at high multiplying power, various electrochemical reactions or internal short circuits can occur in the lithium ion battery, so that the internal temperature and the internal air pressure of the lithium ion battery are continuously increased, thermal runaway is easy to occur, and even combustion and explosion can be caused in severe cases.
In the prior art, the common flame-retardant method is to add flame-retardant substances into the electrolyte of the lithium ion battery, so that when the lithium ion battery is out of control, the flame-retardant substances in the electrolyte play a role, the probability of burning and explosion of the lithium ion battery is reduced, and the use safety of the lithium ion battery is further improved. However, adding a flame retardant to the electrolyte accelerates the rate of capacity fade of the lithium ion battery, thereby affecting the output power of the lithium ion battery or causing deterioration of the low temperature performance of the lithium ion battery.
Therefore, there is a need for a flame retardant approach that has less impact on the overall performance of lithium ion batteries.
Disclosure of Invention
The utility model aims to provide a battery case which can prevent combustion or explosion when a lithium ion battery is out of control, so that the safety of the lithium ion battery is improved, and the overall performance of the lithium ion battery is not affected.
The technical scheme adopted by the utility model is as follows:
the battery case comprises a case body and a flame-retardant component, wherein the flame-retardant component comprises a body, a first explosion-proof valve and flame-retardant substances, the body is arranged on the inner side wall of the case body, a flame-retardant cavity is formed in the body, and the body is provided with explosion-proof holes communicated with the interior of the body; the first explosion-proof valve is installed in the explosion-proof hole, the first explosion-proof valve is configured to be opened when the gas pressure in the shell is larger than a first preset opening pressure, the flame-retardant substance is arranged in the flame-retardant cavity, and the flame-retardant substance can be discharged out of the flame-retardant cavity through the opened first explosion-proof valve so as to be dispersed in the shell.
Optionally, the body further has an injection hole communicating with the inside thereof, and the flame-retardant assembly further includes a sealing plug sealingly installed in the injection hole.
Optionally, the body extends along a height direction of the housing, and the explosion-proof hole and the injection hole are disposed on two walls opposite to each other in the extending direction of the body.
Optionally, the body is in a triangular prism shape, and the first side of the body is connected to the side wall of the shell, and the first side of the body is connected to the inner side wall of the shell.
Optionally, at least one flame retardant component is respectively arranged on two opposite side walls in the length direction of the shell.
Optionally, the length of the body is greater than 1/3 of the height of the battery case and less than the height of the battery case.
Optionally, an explosion-proof score is provided on a side wall of the body, the explosion-proof score being configured to rupture when a gas pressure within the housing is greater than a first preset cracking pressure, so that the flame retardant substance is ejected from a side of the body.
Optionally, the top end of the shell is connected with a battery top cover in a sealing manner, a second explosion-proof valve is installed on the battery top cover, the second explosion-proof valve is configured to be opened when the pressure of gas in the shell is larger than a second preset opening pressure, and the second preset opening pressure is larger than the first preset opening pressure.
The utility model further aims to provide a lithium ion battery which has good flame retardant property and high safety.
The technical scheme adopted by the utility model is as follows:
the lithium ion battery comprises a winding core assembly and the battery shell, wherein the winding core assembly is arranged in the shell, the winding core assembly comprises two winding cores, the side edges of the winding cores are arc-shaped, after the two winding cores are stacked, the side edges of the two winding cores and the shell enclose to form an accommodating area, and the flame-retardant assembly is arranged in the accommodating area.
The utility model also aims to provide a lithium ion battery with better flame retardant property and higher safety.
The technical scheme adopted by the utility model is as follows:
the lithium ion battery comprises a winding core assembly and the battery shell, wherein the winding core assembly is arranged in the shell, the winding core assembly comprises a plurality of winding cores which are sequentially arranged, the side edges of the winding cores are arc-shaped, two adjacent winding cores are stacked, the side edges of the two adjacent winding cores and the shell enclose to form a containing area, a plurality of flame-retardant assemblies are arranged, each containing area corresponds to one flame-retardant assembly, and the flame-retardant assemblies are respectively arranged in the corresponding containing areas.
The utility model has the beneficial effects that:
according to the battery shell and the lithium ion battery, the flame-retardant component is arranged on the inner wall of the shell and comprises the body, the first explosion-proof valve and the flame-retardant substance, when the lithium ion battery is in thermal runaway and the gas pressure in the shell is greater than or equal to the opening pressure of the first explosion-proof valve, the first explosion-proof valve is opened, so that the flame-retardant substance in the flame-retardant cavity of the body can be discharged into the shell and dispersed in the shell, further, the gas combustion or explosion in the shell can be prevented, the safety of the lithium ion battery applying the battery shell is improved, the inner space of the shell is fully utilized by the arrangement mode of the flame-retardant component, the capacity attenuation speed of the lithium ion battery cannot be interfered, and the lithium ion battery is guaranteed to have good circulation performance and energy density.
Drawings
Fig. 1 is a schematic structural diagram of a lithium ion battery according to an embodiment of the present utility model;
fig. 2 is a top view of a lithium ion battery without showing a battery top cover according to an embodiment of the present utility model;
fig. 3 is a schematic structural view of a portion of a battery case according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of the positions of a winding core assembly and a flame retardant assembly according to an embodiment of the present utility model;
FIG. 5 is a schematic cross-sectional view of a flame retardant assembly provided by an embodiment of the utility model;
FIG. 6 is an enlarged schematic view of the utility model at A shown in FIG. 5;
FIG. 7 is an enlarged schematic view of the utility model at B shown in FIG. 5;
fig. 8 is a schematic structural diagram of a lithium ion battery with a casing not shown according to an embodiment of the present utility model;
fig. 9 is a schematic structural diagram of another lithium ion battery according to an embodiment of the present utility model.
In the figure:
1. a housing; 2. a flame retardant assembly; 20. a flame retardant cavity; 21. a body; 211. explosion-proof holes; 212. an injection hole; 22. a first explosion-proof valve; 23. a sealing plug; 3. a battery top cover; 10. a winding core assembly; 101. a winding core; 100. a receiving area.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Example 1
The embodiment provides a battery case, which is applied to a lithium ion battery, can prevent combustion or explosion when the lithium ion battery is out of control, improves the safety of the lithium ion battery, and does not influence the overall performance of the lithium ion battery.
As shown in fig. 1 and 2, the battery case includes a case 1 and a flame retardant assembly 2 disposed within the case 1.
The flame-retardant component 2 comprises a body 21, a first explosion-proof valve 22 and a flame-retardant substance. The body 21 is located within the housing 1, in particular, the body 21 is disposed on an inner sidewall of the housing 1, and in some embodiments, the body 21 may be fixed to the sidewall of the housing 1 by welding. Illustratively, the wall of the body 21 is thinner than the wall of the housing 1.
In this embodiment, a flame-retardant cavity 20 is formed in the body 21, a flame-retardant substance is disposed in the flame-retardant cavity 20, and the flame-retardant substance can be discharged from the flame-retardant cavity 20 through the opened first explosion-proof valve 22 to be dispersed in the housing 1, so that the combustion or explosion of the gas in the housing 1 can be prevented.
The wall of the body 21 has explosion-proof holes 211 communicating with the inside thereof. The first explosion proof valve 22 is mounted in the explosion proof aperture 211, and in some embodiments, the first explosion proof valve 22 is sealingly mounted in the first explosion proof aperture 211, such as by being fixedly secured to the body 21 by welding or the like. The first explosion proof valve 22 is configured to open when the gas pressure in the housing 1 is greater than a first preset opening pressure, normally the gas in the housing 1 is limited and the pressure does not reach the first preset opening pressure. When the pressure of the gas in the case 1 reaches the first preset opening pressure, it indicates that the lithium ion battery is thermally out of control, and a large amount of gas is generated to be accumulated in the case 1, so that the pressure of the gas in the case 1 is increased. The first preset cracking pressure may be set as desired. When the gas pressure in the housing is greater than the first preset opening pressure, the first explosion-proof valve 22 is opened into the flame-retardant chamber.
The battery case that this embodiment provided sets up fire-retardant subassembly 2 at the inner wall of casing 1, fire-retardant subassembly 2 includes body 21, first explosion-proof valve 22 and fire-retardant material, when the lithium ion battery takes place thermal runaway and the gas pressure in the casing 1 is greater than first default opening pressure, first explosion-proof valve 22 opens for fire-retardant material in fire-retardant chamber 20 that is located body 21 can discharge and spread in casing 1, and then can prevent the gas combustion or the explosion in casing 1, the security of the lithium ion battery of using the battery case has been improved, and fire-retardant subassembly 2's setting mode make full use of the inner space of casing 1, and can not interfere the capacity decay rate of lithium ion battery, guaranteed that lithium ion battery has good circulating property and energy density.
In some alternative embodiments, the body 21 further has an injection hole 212 communicating with the inside thereof, and the flame retardant substance and other substances can be filled into the body 21 through the injection hole 212, thereby facilitating the replacement of the flame retardant substance. The battery case further includes a sealing stopper 23, and the sealing stopper 23 is sealingly mounted in the injection hole 212 for sealing the body 21.
Optionally, an explosion-proof score is provided on the side wall of the body 21, and the explosion-proof score is configured to rupture when the gas pressure in the housing 1 is greater than the first preset opening pressure, so that the flame retardant substance is ejected from the side of the body 21. It should be noted that the purpose of the explosion-proof score is to locally reduce the wall thickness of the body 21, so as to facilitate the rupture of the body 21, but the flame-retardant substance in the flame-retardant cavity 20 will not leak from the explosion-proof score when the body 21 is used normally. The explosion-proof nicks can be formed by stamping, scraping and the like.
In this embodiment, as shown in fig. 1, the housing 1 has a rectangular parallelepiped shape, and the housing 1 has a longitudinal direction X, a width direction Y, and a height direction Z.
Further alternatively, as shown in fig. 3, the body 21 extends in the height direction Z of the case 1, that is, the length direction of the body 21 is parallel to the height direction Z of the case 1, and the explosion-proof hole 211 and the injection hole 212 are provided on two walls opposite to each other in the extending direction of the body 21, that is, one of the explosion-proof hole 211 and the injection hole 212 is provided on the top end face of the body 21, and the other is provided on the bottom end face of the body 21. In this embodiment, as shown in fig. 3 to 7, the explosion-proof hole 211 is disposed on the bottom end surface of the body 21, that is, the first explosion-proof valve 22 is located at the bottom end of the body 21, so as to facilitate the discharge of the flame retardant substance, and facilitate the discharge of the flame retardant substance to be distributed over the whole housing 1, thereby improving the flame retardant effect. The injection hole 212 is provided on the top end face of the body 21 so as to inject the flame retardant substance into the body 21 through the injection hole 212 from the top end opening of the case 1.
In some alternative embodiments, the body 21 is triangular prism shaped and the first side of the body 21 is connected to the inner side wall of the housing 1. After a plurality of winding cores 101 are stacked, as shown in fig. 8, the side edges of two adjacent winding cores 101 and the casing 1 enclose to form a containing area 100, and the edges of the body 21 opposite to the first side face extend to the containing area 100. The body 21 can fully utilize the accommodating area 100, so that the arrangement of the flame retardant assembly 2 does not need to additionally increase the volume of the shell 1, i.e. the shell 1 does not need to be redesigned, and the flame retardant cost is reduced.
In this embodiment, the body 21 does not extend from the top end of the housing 1 to the bottom end of the housing 1, but extends from the top end of the housing 1 to the middle of the housing 1, so as to prevent the situation that the flame retardant substance cannot be discharged, that is, the length of the body 21 in this embodiment is greater than 1/3 of the height of the battery case and less than the height of the battery case, on one hand, the body 21 can have a larger space for accommodating the flame retardant substance, so as to have enough flame retardant substance to prevent the combustion and explosion of the gas in the housing 1, and on the other hand, the discharge of the flame retardant substance can be facilitated. The top end of the body 21 extends to the top end of the housing 1 to facilitate injection of the flame retardant substance into the body 21.
Optionally, the fire-retardant substance includes a fire retardant and/or fire extinguishing agent disposed in the fire-retardant chamber 20, the fire retardant and/or fire extinguishing agent being capable of exiting the fire-retardant chamber 20 through the open first explosion-proof valve 22 to be dispersed in the housing 1, the fire retardant being capable of preventing combustion of gas in the housing 1, the fire extinguishing agent being capable of extinguishing a fire upon combustion of gas in the housing 1. The fire extinguishing agent and the fire retardant are all substances in the prior art, and the present embodiment is not limited as long as the fire extinguishing agent and the fire retardant can achieve the corresponding functions. The fire extinguishing agent and the fire retardant in this embodiment are both solid and powdery, and the fire extinguishing agent and the fire retardant can be physically mixed together, so that the substances discharged from the fire-retardant chamber 20 have both a fire-retardant effect and a fire-extinguishing effect. It will be appreciated that the fire retardant may be an aqueous agent, and the fire extinguishing agent may be an aqueous agent, which is not limited in this embodiment.
In some alternative embodiments, as shown in fig. 1, the top end of the housing 1 is open, and the top end of the housing 1 is hermetically connected with the battery top cover 3. The battery top cover 3 is provided with a second explosion-proof valve, and the second explosion-proof valve penetrates through the battery top cover 3. And, the second explosion-proof valve is configured to be opened when the pressure of the gas in the housing 1 is greater than a second preset opening pressure so that the gas in the housing 1 can be discharged. The second preset opening pressure is greater than the first preset opening pressure, so that when the first explosion-proof valve 22 is opened, the second explosion-proof valve can not be opened, so that the fire retardant and the fire extinguishing agent can fully play a role to ensure that the gas in the shell 1 can not burn or explode as much as possible, and further, when the second explosion-proof valve is opened, the unburned gas is discharged by the second explosion-proof valve and can not be a flame. In some embodiments, the second preset cracking pressure is slightly greater than the first preset cracking pressure. It should be noted that, the first preset opening pressure and the second preset opening pressure are both smaller than the critical pressure value when the battery burns or explodes, that is, are both smaller than the minimum pressure value required by the battery burning or exploding. The battery top cover 3 is further provided with a pole and other components, and the present embodiment is not limited thereto, as may be seen from the prior art.
In this embodiment, one or more flame retardant assemblies 2 may be disposed according to actual needs, and for example, two opposite side walls in the length direction X of the housing 1 are respectively provided with at least one flame retardant assembly 2, so as to have a better flame retardant effect.
According to the battery case provided by the embodiment, the flame retardant assembly 2 is fixed on the side wall of the aluminum case 1 in a welding mode, so that the space utilization rate of the battery case is effectively improved. The flame-retardant substance is placed in the flame-retardant cavity 20, so that the safety of the lithium ion battery is improved, the width of the lower plastic can be reduced, and the space utilization rate of the shell 1 can be improved under the condition of fixed volume. The side wall welding body 21 of the housing 1 has a large welding space, so that the production efficiency is relatively high. Due to the existence of the flame-retardant substance, the flame-retardant substance can be discharged in time when thermal runaway occurs, so that the intensity of the thermal runaway is effectively reduced, the explosion of the lithium ion battery is further prevented, and the safety of the battery is improved.
In this embodiment, the pressure release principle of the first explosion-proof valve 22 is applied, when the internal pressure of the casing 1 reaches a certain threshold (i.e., a first preset opening pressure), the first explosion-proof valve 22 at the bottom of the body 21 cracks in advance to release a flame retardant substance, thereby effectively preventing or reducing the occurrence or explosion of thermal runaway and improving the space utilization rate of the battery case and the safety of the lithium ion battery.
Example two
The present embodiment provides a lithium ion battery, as shown in fig. 8, the lithium ion battery includes a winding core assembly 10 and a battery case in the first embodiment, and the winding core assembly 10 is disposed in the case 1. The winding core assembly 10 comprises two winding cores 101, the two winding cores 101 are attached to each other along the width direction Y of the shell 1, the side edge of each winding core 101 is arc-shaped, after the two winding cores 101 are stacked, the side edges of the two winding cores 101 and the shell 1 are enclosed to form a containing area 100, and the flame-retardant assembly 2 is arranged in the containing area 100. Specifically, there are two accommodation areas 100, two corresponding accommodation areas 100 of the flame retardant assemblies 2, and the body 21 of each flame retardant assembly 2 is disposed toward its corresponding accommodation area 100.
The lithium ion battery provided by the embodiment has higher flame retardant characteristics, and can reduce the probability of combustion or explosion. And the electrolyte of the lithium ion battery is not additionally doped with flame retardant substances, so that the capacity attenuation speed of the lithium ion battery can be ensured, the output power of the lithium ion battery can not be influenced, and the low-temperature performance of the lithium ion battery is ensured.
Example III
The present embodiment provides a lithium ion battery, as shown in fig. 9, which includes a winding core assembly 10 and a battery case in the first embodiment. The winding core assembly 10 is disposed in the housing 1, and the winding core assembly 10 includes a plurality of winding cores 101 sequentially arranged along the width direction of the housing 1. The side of every core 101 is convex, and after two adjacent core 101 stacks, two adjacent core 101's side encloses with casing 1 and establishes and form accommodation area 100, and fire-retardant subassembly 2 is equipped with a plurality ofly, and every accommodation area 100 all corresponds fire-retardant subassembly 2, and a plurality of fire-retardant subassemblies 2 set up respectively in the accommodation area 100 that corresponds. Specifically, each body 21 is disposed toward the accommodation region 100 corresponding thereto, and by providing a plurality of flame retardant assemblies 2, the flame retardant effect of the battery case can be improved to further improve the safety of the lithium ion battery.
The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. The battery case is characterized by comprising a case body (1) and a flame-retardant component (2), wherein the flame-retardant component (2) comprises a body (21), a first explosion-proof valve (22) and flame-retardant substances, the body (21) is arranged on the inner side wall of the case body (1), a flame-retardant cavity (20) is formed in the body (21), and the body (21) is provided with explosion-proof holes (211) communicated with the inside of the flame-retardant cavity; the first explosion-proof valve (22) is installed in the explosion-proof hole (211), the first explosion-proof valve (22) is configured to be opened when the gas pressure in the shell (1) is larger than a first preset opening pressure, the flame-retardant substance is arranged in the flame-retardant cavity (20), and the flame-retardant substance can be discharged out of the flame-retardant cavity (20) through the opened first explosion-proof valve (22) so as to be dispersed in the shell (1).
2. The battery case according to claim 1, wherein the body (21) further has an injection hole (212) communicating with the inside thereof, and the flame retardant assembly (2) further comprises a sealing plug (23), the sealing plug (23) being sealingly mounted in the injection hole (212).
3. The battery case according to claim 2, wherein the body (21) extends in a height direction of the case (1), and the explosion-proof hole (211) and the injection hole (212) are provided on two walls opposite to each other in the extending direction of the body (21).
4. A battery case according to any one of claims 1-3, characterized in that the body (21) has a triangular prism shape and the first side of the body (21) is connected to the inner side wall of the case (1).
5. A battery case according to any one of claims 1-3, wherein at least one of the flame retardant assemblies (2) is provided on each of two opposite side walls of the case (1) in the length direction.
6. A battery case according to any one of claims 1-3, characterized in that the length of the body (21) is greater than 1/3 of the height of the battery case and less than the height of the battery case.
7. A battery housing according to any one of claims 1-3, characterized in that the top end of the housing (1) is sealingly connected with a battery top cover (3), a second explosion-proof valve being mounted on the battery top cover (3), the second explosion-proof valve being configured to open when the pressure of the gas in the housing (1) is greater than a second preset opening pressure, which is greater than the first preset opening pressure.
8. A battery case according to any one of claims 1-3, characterized in that an explosion-proof score is provided on the side wall of the body (21), said explosion-proof score being configured to rupture when the gas pressure inside the case (1) is greater than a first preset opening pressure, so that the flame-retardant substance is ejected from the side of the body (21).
9. The lithium ion battery is characterized by comprising a winding core assembly (10) and the battery shell according to any one of claims 1-8, wherein the winding core assembly (10) is arranged in the shell (1), the winding core assembly (10) comprises two winding cores (101), the side edges of the winding cores (101) are arc-shaped, after the two winding cores (101) are stacked, the side edges of the two winding cores (101) and the shell (1) are surrounded to form a containing area (100), and the flame retardant assembly (2) is arranged in the containing area (100).
10. Lithium ion battery, its characterized in that includes a roll core subassembly (10) and any one of claims 1-8 battery case, roll core subassembly (10) are located in casing (1), just roll core subassembly (10) are including a plurality of rolls of core (101) of arranging in proper order, the side of rolling up core (101) is convex, adjacent two after rolling up core (101) stack, the side of adjacent two rolls of core (101) encloses with casing (1) and establishes and form accommodation area (100), fire-retardant subassembly (2) are equipped with a plurality of, every accommodation area (100) all correspond one fire-retardant subassembly (2), a plurality of fire-retardant subassemblies (2) set up respectively in corresponding accommodation area (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321635288.0U CN220106676U (en) | 2023-06-26 | 2023-06-26 | Battery case and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321635288.0U CN220106676U (en) | 2023-06-26 | 2023-06-26 | Battery case and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220106676U true CN220106676U (en) | 2023-11-28 |
Family
ID=88847253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321635288.0U Active CN220106676U (en) | 2023-06-26 | 2023-06-26 | Battery case and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220106676U (en) |
-
2023
- 2023-06-26 CN CN202321635288.0U patent/CN220106676U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020153016A1 (en) | Battery pack | |
| JP4907362B2 (en) | Medium or large battery pack with safety device | |
| WO2020153018A1 (en) | Battery pack | |
| CN215988966U (en) | End cover assembly, battery monomer, battery and power consumption device | |
| CN216354617U (en) | Battery cell, battery and power consumption device | |
| JP2022545324A (en) | Battery case, battery, power consumption device, battery manufacturing method and apparatus | |
| CN115472997B (en) | Battery end cover assembly, energy storage device and electric equipment | |
| KR102681020B1 (en) | Battery, device, battery manufacturing method and battery manufacturing device | |
| CN218414891U (en) | Battery box, battery, electric device and device for preparing battery | |
| US20220328927A1 (en) | Battery, electric apparatus, and method and device for preparing battery | |
| KR102567801B1 (en) | Rapid Fire Extinguishing System for Vehicle Battery Pack Fire | |
| KR20220104219A (en) | Batteries, devices, battery manufacturing methods and battery manufacturing devices | |
| US20240266667A1 (en) | Battery cell, battery, power consumption device, and method and device for producing battery cell | |
| CN220106676U (en) | Battery case and lithium ion battery | |
| CN218215490U (en) | End cover assembly, battery monomer, battery and consumer | |
| WO2023050078A1 (en) | Battery, electrical apparatus, method and apparatus for preparing battery | |
| CN112952252A (en) | Structure for preventing battery explosion, battery module and battery pack | |
| CN221805766U (en) | Battery pack bottom plate assembly and battery pack | |
| CN220209247U (en) | Battery cell casing and battery | |
| CN219779137U (en) | Protection device of battery module and battery module | |
| CN217041139U (en) | Battery pack fire extinguishing system | |
| CN217134592U (en) | Flame-retardant structure, battery monomer, battery and power consumption device | |
| CN221262635U (en) | End cover assembly, battery cell, battery and power utilization device | |
| CN219801134U (en) | Battery pack and vehicle | |
| CN219642971U (en) | Flame-retardant battery cover plate assembly, cylindrical battery and battery module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240730 Address after: 313100 Green Intelligent Manufacturing Industrial Park, South Taihu industrial cluster, Changxing County Development Zone, Huzhou City, Zhejiang Province Patentee after: Jiewei Power (Changxing) Co.,Ltd. Country or region after: China Address before: No.11, Kaiyuan Road, Xiqing automobile industrial zone, Xiqing District, Tianjin 300380 Patentee before: TIANJIN EV ENERGIES Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right |