Lithium ion battery and energy storage device
By designing the shell structure and flow tube of lithium-ion batteries and energy storage devices, the rapid isolation of lithium-ion batteries during fire and the reduction of flame spread is achieved, and the problem of fire spreading without protective structures in existing lithium-ion batteries is solved, and rapid response and damage reduction in the early stages of fire are achieved.
Patent Information
- Application Number
- CN202510445304.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2025-06-27
AI Technical Summary
The existing lithium-ion batteries have not been equipped with a protective structure, which makes it impossible to deal with it in time when the fire catches, and the fire spreads rapidly, causing the problem of the fire to expand.
A lithium-ion battery and energy storage device are designed, including housing 1, top cover, housing 2, flow guide and support. Through the mutual contact and cooperation of these structures, the rapid isolation of the lithium-ion battery during fire and the reduction of flame spread is achieved.
When a lithium-ion battery catches fire, it can quickly isolate the battery, reduce flame spread, achieve emergency treatment, and respond quickly in the early stages of the fire to reduce damage caused by the fire.
Smart Images
Figure CN120221898A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of lithium-ion batteries, and particularly relates to a lithium-ion battery and an energy storage device. Background Art
[0002] The working principle of a lithium-ion battery is based on the process of lithium ions being inserted into and extracted from the positive and negative electrode materials. During charging, lithium ions are extracted from the positive electrode material, migrate through the electrolyte solution to the negative electrode, and are inserted into the negative electrode material; during discharging, on the contrary, lithium ions are extracted from the negative electrode material, return to the positive electrode through the electrolyte solution, thereby realizing the storage and release of electrical energy. In this process, the lithium-ion battery exhibits excellent properties such as high voltage, high specific energy, and low self-discharge rate. At the same time, the lithium battery is an excellent energy storage device.
[0003] During the actual use of lithium-ion batteries, they may catch fire due to reasons such as short circuit between the positive and negative electrodes, internal short circuit of the battery cell, and aging. However, existing lithium-ion batteries generally do not have a protection structure. When a lithium-ion battery catches fire, it cannot be dealt with in time, and often due to untimely isolation, the fire spreads rapidly, resulting in the problem of the fire expanding. Therefore, in this solution, a lithium-ion battery and an energy storage device are proposed to solve the above problems. Summary of the Invention
[0004] The purpose of the present invention is to provide a lithium-ion battery and an energy storage device to solve the problem that existing lithium-ion batteries generally do not have a protection structure, resulting in the inability to deal with them in time when a lithium-ion battery catches fire, often due to untimely isolation, the fire spreads rapidly, and further causes the problem of the fire expanding.
[0005] To achieve the above purpose, the present invention provides the following technical solution: A lithium-ion battery includes a lithium-ion battery body, and further includes an outer shell one. Pressure components are respectively installed on the four sides of the top surface of the outer shell one. A support member is installed on the bottom surface of the inner cavity of the outer shell one. An outer shell two is installed on the top surface of the support member. The lithium-ion battery body is installed on the bottom surface of the inner cavity of the outer shell two. Storage components are respectively installed on the four inner side walls of the outer shell two. A top cover is installed above the inner cavity of the outer shell two. Through holes two are evenly opened on the side wall of the outer shell one, and through holes one are evenly opened on the side wall of the outer shell two; Four fire guiding grooves are formed in a rectangular shape on the bottom surface of the outer shell two, and four flow holes are evenly opened on the bottom surface of the inner cavity of the outer shell two; Four mounting holes are evenly opened on the bottom surface of the inner cavity of the outer shell one. A diversion tube is installed in the inner cavity of the mounting hole, and the diversion tube is designed to be bent and folded; The support member is made of cotton.
[0006] Preferably, the pressure assembly includes a mounting frame. The mounting frames are respectively installed on the four sides of the top surface of the first housing. Slide grooves are respectively formed on both sides of the inner cavity of the mounting frame. A spring is installed on the bottom surface of the inner cavity of the slide groove, and a connecting member is installed on the top of the spring.
[0007] Preferably, limiting blocks are symmetrically arranged on the connecting member. The limiting blocks and the slide grooves slide relative to each other. The connecting member is in an "L" shape. One side of the connecting member away from the mounting frame is connected to a top cover.
[0008] Preferably, the storage assembly includes a storage box and a column. A plurality of storage boxes are evenly arranged on the four inner walls of the second housing from top to bottom. A plurality of through grooves are formed on the bottom surface of the storage box. The column is connected to the bottom surface of the inner cavity of the first housing.
[0009] Preferably, the column penetrates through the top surface or the bottom surface of the storage box, and the column and the storage box slide relative to each other. A plurality of groups of clamping blocks are symmetrically arranged on the side wall of the column. There are two clamping blocks in a group, and they are symmetrically arranged on the outer wall of the column. The clamping blocks are slidably installed in the inner cavity of the through groove.
[0010] Preferably, a connecting disk is installed in the inner cavity of a plurality of the second through holes, and a connecting disk is installed in the inner cavity of a plurality of the first through holes. A plurality of inclined grooves are evenly formed on the connecting disk.
[0011] Preferably, the ear of the lithium-ion battery body penetrates through the top cover and extends above the top cover.
[0012] Preferably, a fixing plate is installed on the bottom surface of the first housing, and the inner wall of the first housing is in contact with the second housing.
[0013] An energy storage device, the energy storage device includes the above-mentioned lithium-ion battery.
[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By providing the first housing, the top cover, the second housing, the diversion pipe and the support member, when the device is in use, through the mutual contact between the above structures, it is realized that when the lithium-ion battery body catches fire, the lithium-ion battery can be quickly isolated, and the spread of the flame outward can be reduced, so as to achieve the effect of emergency treatment.
[0015] 2. By providing the storage assembly, the first housing, the top cover, the second housing, the diversion pipe and the support member, when the device is in use, through the mutual cooperation between the above structures, it is realized that when a fire occurs to the lithium-ion battery body, the surface of the lithium-ion battery body can be covered with dry powder at the initial stage of the fire of the lithium-ion battery body, so as to reduce manual intervention, and this system can quickly respond at the initial stage of the fire and reduce the damage caused by the fire. Description of the Drawings
[0016] Figure 1 It is a front view of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 It is the internal structure diagram of the present invention; Figure 4 It is a cross-sectional view of the storage assembly of the present invention; Figure 5 This is a structural diagram of a housing of the present invention; Figure 6 It is a structural diagram of the second housing of the present invention; Figure 7 This is a structural diagram of the connection disk of the present invention; Figure 8 for Figure 1 Enlarged structural diagram at point A in the middle.
[0017] In the figure: 1. Shell 1; 2. Top cover; 3. Shell 2; 4. Pressure assembly; 401. Mounting frame; 402. Slide; 403. Connector; 404. Spring; 405. Limit block; 5. Lithium-ion battery body; 6. Connecting plate; 7. Fixing plate; 9. Flow guide tube; 10. Support member; 11. Storage assembly; 111. Storage box; 112. Through slot; 113. Snap-in block; 114. Column; 12. Fixing block; 13. Through hole 1; 14. Mounting hole; 15. Through hole 2; 16. Fire guide slot; 17. Flow hole; 18. Inclined slot. DETAILED DESCRIPTION
[0018] The following will be combined with the attached Figure 1 To Attachment Figure 5 The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] It should be noted that if there are directions involved in the embodiments of the present invention, they shall be based on the directions shown in the drawings, such as front and back. Figure 1 The specific Figure 1 The left side is the front, Figure 1 The right side is the back; at the same time Figure 2 As shown in the figure, the left-right direction is roughly the horizontal direction, and the up-down direction shown in the figure is the vertical direction. If a certain posture changes, the directional indication will also change accordingly.
[0020] Reference Figures 1 - 8As shown in the figure, the present invention provides a lithium-ion battery, which includes a lithium-ion battery body 5, and also includes an outer shell 1. Four sides of the top surface of the outer shell 1 are respectively provided with pressure components 4. The bottom surface of the inner cavity of the outer shell 1 is provided with a support member 10. The top surface of the support member 10 is provided with an outer shell 2 3. The bottom surface of the inner cavity of the outer shell 2 3 is provided with a lithium-ion battery body 5. Four inner side walls of the outer shell 2 3 are respectively provided with storage components 11. The top cover 2 is installed above the inner cavity of the outer shell 2 3. Through holes 2 15 are evenly opened on the side wall of the outer shell 1. Through holes 1 13 are evenly opened on the side wall of the outer shell 2 3; Four fire guiding grooves 16 are formed in a rectangular shape on the bottom surface of the outer shell 2 3. Four flow holes 17 are evenly opened on the bottom surface of the inner cavity of the outer shell 2 3; Among them, when the lithium-ion battery body 5 catches fire, the support member 10 can be quickly burned through the fire guiding groove 16, so that the support member 10 burns out; Four installation holes 14 are evenly opened on the bottom surface of the inner cavity of the outer shell 1. A diversion pipe 9 is installed in the inner cavity of the installation hole 14. The diversion pipe 9 is designed to be bent and folded; Among them, the support member 10 is made of cotton. After the cotton is compressed, the compressed cotton is shaped and sealed with a plastic bag. When the support member 10 encounters fire, it is easy to burn out quickly, so that the outer shell 2 3 descends; Furthermore, the thickness of the support member 10 does not exceed 5 mm to avoid too slow burning speed of the support member 10. At the same time, the diameters of the through holes 2 15 and the through holes 1 13 should be smaller than the thickness of the support member 10. The distance between adjacent through holes 2 15 or through holes 1 13 should be greater than 5 mm to avoid the inability to seal each other between the outer shell 1 and the outer shell 2 3.
[0021] In a further embodiment, refer to Figure 1 and Figure 8 , the pressure component 4 includes an installation frame 401. The four sides of the top surface of the outer shell 1 are respectively provided with the installation frame 401. Two sides of the inner cavity of the installation frame 401 are respectively provided with sliding grooves 402. The bottom surface of the inner cavity of the sliding groove 402 is provided with a spring 404. The top of the spring 404 is provided with a connecting member 403; The connecting member 403 is symmetrically provided with limit blocks 405. The limit blocks 405 and the sliding grooves 402 slide relative to each other. The connecting member 403 is in an "L" shape. The side of the connecting member 403 away from the installation frame 401 is connected to the top cover 2; Among them, when the support member 10 burns out, the outer shell 2 3 will move downward under the gravity of the lithium-ion battery body 5; Furthermore, under the action of the spring 404, the connecting member 403 will press down the top cover 2 and the outer shell 2 3, thereby accelerating the descending speed of the outer shell 2 3.
[0022] In a further embodiment, refer to Figure 1 - Figure 4, the storage component 11 includes a storage box 111 and a column 114. A plurality of storage boxes 111 are evenly arranged on the inner walls of the four sides of the outer shell two 3 from top to bottom. A plurality of through grooves 112 are formed on the bottom surface of the storage box 111. The column 114 is connected to the bottom surface of the inner cavity of the outer shell one 1; Among them, fixing blocks 12 are symmetrically arranged on the storage box 111. The fixing blocks 12 further increase the contact area with the lithium-ion battery body 5 and enhance the stability of the lithium-ion battery body 5.
[0023] In a further embodiment, referring to Figure 1 - Figure 4 , the column 114 penetrates the top or bottom surface of the storage box 111, and the column 114 and the storage box 111 slide relative to each other. A plurality of groups of clamping blocks 113 are arranged on the side wall of the column 114. There are two clamping blocks 113 in a group, and they are symmetrically arranged on the outer wall of the column 114. The clamping blocks 113 are slidably installed in the inner cavity of the through groove 112; Among them, the storage box 111 stores dry powder (mainly composed of ammonium phosphate and other components).
[0024] In a further embodiment, referring to Figure 1 - Figure 7 , a connection disk 6 is installed in the inner cavity of a plurality of through holes two 15, a connection disk 6 is installed in the inner cavity of a plurality of through holes one 13, and a plurality of inclined grooves 18 are evenly formed on the connection disk 6; Among them, the inclined grooves 18 of the connection disks 6 on the through holes two 15 and the through holes one 13 are staggered with each other, reducing the probability of foreign objects entering the outer shell two 3. At the same time, the staggered design can play a certain blocking role when a fire breaks out.
[0025] In a further embodiment, referring to Figure 1 , the ear of the lithium-ion battery body 5 penetrates the top cover 2 and extends above the top cover 2.
[0026] In a further embodiment, referring to Figure 1 - Figure 3 , a fixing plate 7 is installed on the bottom surface of the outer shell one 1, and the inner wall of the outer shell one 1 is in contact with the outer shell two 3; Among them, the outer shell one 1 and the outer shell two 3 are in contact with each other. When the outer shell two 3 slides downward, the through holes two 15 and the through holes one 13 on the outer shell one 1 and the outer shell two 3 are staggered with each other, thereby reducing the air circulation and the channels for the spread of flames.
[0027] An energy storage device, the energy storage device includes the above-mentioned lithium-ion battery.
[0028] The working principle of the present invention is as follows: When the lithium-ion battery body 5 catches fire for various reasons during the use of the device, the flame will quickly burn out the support member 10, and then the outer shell two 3 will quickly descend under the gravity of the lithium-ion battery body 5 and the pressure of the spring 404; Subsequently, the through hole two 15 and the through hole one 13 on the outer shell one 1 and the outer shell two 3 are staggered with each other, thereby reducing the air circulation and the flame spread channel So that the burning smoke is discharged along the flow hole 17 and the diversion pipe 9. Due to the curved and folded design of the diversion pipe 9, the probability of the flame spreading out is avoided, and the possibility of the flame spreading is reduced; At the same time, when the outer shell two 3 descends, the column 114 and the storage box 111 will slide relative to each other, so that the through groove 112 will be opened, and the dry powder in the storage box 111 will fall into the outer shell two 3, which can absorb heat, reduce the flame temperature, and inhibit the combustion reaction.
[0029] According to the disclosure and teachings of the above specification, those skilled in the art of the present invention can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.
Claims
1. A lithium-ion battery, comprising a lithium-ion battery body (5), characterized in that: It also comprises a first shell (1), the top surface of the first shell (1) having pressure assemblies (4) respectively mounted on four sides, the bottom surface of the inner cavity of the first shell (1) having a support member (10) mounted on the top surface of the support member (10), the second shell (3) mounted on the bottom surface of the inner cavity of the second shell (3) having a lithium-ion battery body (5) mounted on the bottom surface, the inner walls of the four sides of the second shell (3) having storage assemblies (11) respectively mounted on the inner walls, the top cover (2) mounted above the inner cavity of the second shell (3), the side walls of the first shell (1) having through holes (15) uniformly opened, and the side walls of the second shell (3) having through holes (13) uniformly opened; The bottom surface of the second shell (3) is rectangular and has four fire guide grooves (16), and the bottom surface of the inner cavity of the second shell (3) is evenly provided with four flow holes (17); The bottom surface of the inner cavity of the housing 1 (1) is evenly provided with four mounting holes (14), the inner cavity of the mounting holes (14) is provided with a flow guide tube (9), and the flow guide tube (9) is designed to be bent and folded; The support member (10) is made of cotton.
2. A lithium ion battery according to claim 1, characterized in that: The pressure assembly (4) comprises a mounting frame (401), the mounting frames (401) being respectively mounted on four sides of the top surface of the housing (1), the inner cavity of the mounting frame (401) being respectively provided with slide grooves (402), the inner cavity bottom surface of the slide groove (402) being provided with a spring (404), and the top of the spring (404) being provided with a connecting piece (403).
3. A lithium ion battery according to claim 2, characterized in that: The connection member (403) is symmetrically provided with limit blocks (405), the limit blocks (405) and the slide groove (402) slide relative to each other, the connection member (403) is in an "L" shape, and a top cover (2) is connected to a side of the connection member (403) away from the installation frame (401).
4. A lithium ion battery according to claim 1, characterized in that: The storage assembly (11) comprises a storage box (111) and a column (114); the inner walls of the four sides of the second shell (3) are evenly provided with a plurality of storage boxes (111) from top to bottom; the bottom surface of the storage box (111) is provided with a plurality of through slots (112); and the column (114) is connected to the bottom surface of the inner cavity of the first shell (1).
5. A lithium ion battery according to claim 4, characterized in that: The column (114) passes through the top surface or the bottom surface of the storage box (111), and the column (114) and the storage box (111) slide relative to each other. The side walls of the column (114) are provided with a plurality of groups of clamping blocks (113), wherein a group of clamping blocks (113) has two and are symmetrically arranged on the outer wall of the column (114). The clamping blocks (113) are slidably installed in the inner cavity of the through groove (112).
6. A lithium ion battery according to claim 1, characterized in that: The inner cavities of the plurality of through holes 2 (15) are equipped with connection plates (6), and the inner cavities of the plurality of through holes 1 (13) are equipped with connection plates (6), and the connection plates (6) are evenly provided with a plurality of inclined grooves (18).
7. A lithium ion battery according to claim 1, characterized in that: The tabs of the lithium-ion battery body (5) penetrate the top cover (2) and extend to the top of the top cover (2).
8. A lithium ion battery according to claim 1, characterized in that: A fixing plate (7) is installed on the bottom surface of the shell one (1), and the inner wall of the shell one (1) and the shell two (3) are in contact with each other.
9. An energy storage device, characterized in that: The energy storage device comprises the lithium-ion battery according to any one of claims 1 to 8.