CN213752944U - Battery cell and battery module - Google Patents
Battery cell and battery module Download PDFInfo
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- CN213752944U CN213752944U CN202021440749.5U CN202021440749U CN213752944U CN 213752944 U CN213752944 U CN 213752944U CN 202021440749 U CN202021440749 U CN 202021440749U CN 213752944 U CN213752944 U CN 213752944U
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- battery
- explosion
- proof valve
- heat insulation
- thermal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application relates to the technical field of batteries and discloses a battery monomer and a battery module, wherein the battery monomer comprises a battery body and an explosion-proof valve fixedly arranged at the top of the battery body, and a heat insulation unit is arranged on the explosion-proof valve. The battery module comprises a plurality of battery monomers, and at least one battery monomer in the plurality of battery monomers is the battery monomer provided in the technical scheme. The battery cell and the battery module can reduce the possibility that the explosion-proof valve of the battery cell is penetrated by the jet of the thermal runaway battery cell.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery monomer and a battery module.
Background
The safety of the battery module is one of the key points of the industry, and in order to prevent the internal pressure of the battery monomer in the battery module from being too high and improve the safety, in the prior art, the top of the battery monomer in the battery module is provided with an explosion-proof valve.
The battery module that the battery monomer top was equipped with explosion-proof valve, though can solve the battery monomer and press too high problem in, improved battery module's security, however, when certain battery monomer takes place thermal runaway, the free blowout thing whereabouts of blowout battery can melt through other battery monomer's explosion-proof valve to cause the thermal diffusion.
SUMMERY OF THE UTILITY MODEL
The application provides a single battery and battery module, can reduce single battery's explosion-proof valve, by the single battery's of thermal runaway blowout thing melt-through's possibility.
In order to achieve the purpose, the application provides the following technical scheme:
a battery cell, comprising:
a battery body;
and the explosion-proof valve is fixedly arranged at the top of the battery body and is provided with a heat insulation unit.
The application provides a battery monomer has set up thermal-insulated unit on explosion-proof valve, and thermal-insulated unit can keep apart explosion-proof valve and external hot-fluid to prevent invasion and attack explosion-proof valve such as external hot-fluid, avoid explosion-proof valve to be worn by melting.
The present application also provides a battery module, including:
at least one of the plurality of battery cells is any one of the battery cells provided in the above technical scheme.
The battery module that this application provided includes one above-mentioned battery monomer at least, therefore at least one battery monomer can reach the beneficial effect that above-mentioned battery monomer can reach, prevents external hot-fluid etc. and invades explosion-proof valve promptly, avoids explosion-proof valve to be worn by melting.
Drawings
Fig. 1 is a schematic structural diagram of a battery cell provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of an explosion-proof valve and a heat insulation unit in a battery cell provided in an embodiment of the present application;
fig. 3 is a schematic structural view of a heat insulation assembly in a battery module according to an embodiment of the present disclosure;
fig. 4 is a schematic view of a weak part in a battery module according to an embodiment of the present disclosure;
fig. 5 is a schematic view of a weak part in a battery module according to an embodiment of the present disclosure;
fig. 6 is a schematic view of a weak part in a battery module according to an embodiment of the present disclosure;
fig. 7 is a schematic view of a weak part in a battery module according to an embodiment of the present disclosure;
FIG. 8 is an exploded view of a harness plate assembly and an insulation assembly in a battery module provided in accordance with an embodiment of the present application;
fig. 9 is an exploded view of a battery module according to an embodiment of the present disclosure;
fig. 10 is an exploded view of an end plate assembly in a battery module according to an embodiment of the present disclosure.
Icon: 1-a battery cell; 2-an explosion-proof valve; 21-a thermally insulating unit; 3-an insulating assembly; 31-a weakening; 32-a thermally insulating body; 4-a first score; 5-a second score; 6-a wiring harness board assembly; 61-a through hole; 100-a battery assembly; 400-an end plate assembly; 410-a connector; 420-an electrode holder; 421-positive output electrode; 422-negative output electrode; 423-support surface; 424-stiffener; 425-fastening; 430-a protective cover; 431-open cell structure; 440-a containment chamber; 500-a busbar assembly; 510-a positive electrode; 520-negative electrode; 600-side plates; 700-cover plate.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 and fig. 2, a single battery 1 provided in this embodiment includes a battery body and an explosion-proof valve 2 fixed on the top of the battery body, and a heat insulation unit 21 is disposed on the explosion-proof valve 2. The top of the battery body is the upper portion of the battery body in the view of fig. 1.
The battery cell 1 provided by the embodiment is provided with the heat insulation unit 21 on the explosion-proof valve 2, and the heat insulation unit 21 can insulate the explosion-proof valve 1 from external hot fluid, so that the external hot fluid (for example, ejecta of adjacent battery cells) and the like are prevented from invading the explosion-proof valve 2, and the explosion-proof valve 2 is prevented from being melted through.
Specifically, when the heat insulating unit 21 is provided in order to simplify the structure and reduce the cost, the heat insulating unit 21 may include a heat insulating layer provided on the explosion-proof valve 2. For example: the explosion-proof valve 2 comprises an explosion-proof valve body and an insulating layer, and the insulating layer is arranged on one side of the explosion-proof valve body, which deviates from the battery body. The insulating layer is located between insulating layer and the explosion-proof valve body, perhaps, the insulating layer is located one side that the insulating layer deviates from the explosion-proof valve body, and again perhaps, between insulating layer and the explosion-proof valve body, one side that the insulating layer deviates from the explosion-proof valve body all is equipped with the insulating layer.
In order to simplify the arrangement and facilitate the processing, the heat insulation layer can be sprayed or bonded on the corresponding insulation layer or the explosion-proof valve body. It should be noted that, when the heat insulation layer is located between the insulating layer and the explosion-proof valve body, the heat insulation layer is connected with both the insulating layer and the explosion-proof valve body.
In order to simplify the structure of the explosion-proof valve 2, in a specific technical scheme, the heat insulation layer is the insulation layer of the explosion-proof valve 2, namely the explosion-proof valve 2 comprises an explosion-proof valve body and a heat insulation layer, and the heat insulation layer is arranged on the explosion-proof valve body.
The heat insulation layer can comprise at least one of a mica layer, a ceramic layer and a glass fiber layer, namely, the heat insulation layer can comprise any one or two of the mica layer, the ceramic layer and the glass fiber layer; the thermal insulation layer may also comprise a mica layer, a ceramic layer and a glass fiber layer.
The battery module provided by the embodiment comprises a plurality of battery cells, wherein at least one battery cell in the plurality of battery cells is the battery cell in the technical scheme.
The battery module that this application provided includes battery monomer 1 among the above-mentioned technical scheme at least, therefore at least one battery monomer 1 can reach the beneficial effect that battery monomer 1 among the above-mentioned technical scheme can reach, prevents promptly that external hot-fluid etc. from invading explosion-proof valve 2, avoids explosion-proof valve 2 to be worn by melting.
In an optional technical scheme, the battery module comprises a heat insulation assembly 3, wherein the heat insulation assembly 3 is positioned on one side of the explosion-proof valve 2, which faces away from the battery body, and is used for preventing ejecta sprayed by the explosion-proof valve 2 from causing thermal runaway of other battery cells 1; the heat insulation assembly comprises weak portions, and the weak portions correspond to the explosion-proof valves 2 one to one.
Be equipped with thermal-insulated subassembly 3 in one side that each explosion-proof valve 2 deviates from battery body, thermal-insulated subassembly 3 can prevent that explosion-proof valve 2 spun battery blowout from dropping on other battery monomer 1, avoids causing other battery monomer 1 thermal runaway. Meanwhile, due to the existence of the weak part 31 on the heat insulation component 3, when the battery monomer 1 is out of control due to heat, the sprayed materials are easier to rush through the heat insulation component 3 after being sprayed outwards, so that the sprayed materials are smoothly discharged, and further, the heat diffusion is avoided.
The weak portion 31 is a portion of the heat insulating module 3 that is easily punched by the discharged material of the battery cell 1, the shape and size of the weak portion 31 may be the same as those of the explosion-proof valve 2, and the heat insulating body 32 surrounds the corresponding weak portion 31.
Obviously, the thermal insulation assembly 3 and each battery cell 1 are fixed in the battery module.
Since the discharge of the battery cell 1 is discharged through the explosion-proof valve 2, and the range after the discharge is mainly concentrated in the section above the explosion-proof valve 2, the orthographic projection of the heat insulating member 3 on the top surface of the battery cell 1 may cover the orthographic projection of each explosion-proof valve 2 on the top surface of the battery cell 1.
Of course, in order to achieve a better protection effect for each battery cell 1, the orthographic projection of the heat insulation assembly 3 on the top surface of each battery cell 1 may also cover the top surface of each battery cell 1 (including the explosion-proof valve 2 arranged on the battery cell 1).
In one implementation, the top end of each battery body is provided with an explosion-proof valve 2.
The weak parts 31 on the heat insulation assembly 3 correspond to the explosion-proof valves 2 one by one, and the ejections which are punched out of the weak parts 31 are blocked by the battery cover plate 700, so that the impact force is further reduced, the ejections are difficult to punch through the weak parts 31 on the falling path during falling, the ejections are difficult to contact with the explosion-proof valves 2 corresponding to the weak parts 31, and the possibility of fusing through the explosion-proof valves 2 of the adjacent single batteries 1 is greatly reduced.
In order to reduce or even avoid the spread of the sprayed material from the bottom of the heat insulating assembly 3 to the battery cells 1 on both sides, in a specific implementation, the heat insulating assembly 3 abuts against each explosion-proof valve 2.
When the heat insulation assembly 3 is specifically arranged, the heat insulation assembly 3 may include a heat insulation body 32 corresponding to the weak portion 31, the weak portion 31 is connected to the heat insulation body 32, and the thickness of the weak portion 31 is smaller than that of the corresponding heat insulation body 32; as shown in fig. 3, the heat insulation assembly 3 may include a heat insulation body 32 corresponding to the weak portion 31, the weak portion 31 is connected to the heat insulation body 32, and a first notch 4 is provided at a connection portion of the heat insulation body 32 and the corresponding weak portion 31, so that the weak portion 31 is easily separated from the corresponding heat insulation body 32 when the weak portion 31 is impacted by the discharged material of the battery cell 1.
When the heat insulation assembly 3 is specifically arranged, the heat insulation assembly 3 may be a whole, or may include a plurality of heat insulation members corresponding to the battery cells 1 one to one, and the plurality of heat insulation members are independent of each other.
In particular, when the weak portions 31 are provided, in order to make it easier for the ejecta of the battery cells 1 to rush through, in one implementation, the orthographic projection of the weak portion 31 on the top surface of the corresponding battery cell 1 covers the orthographic projection of the corresponding explosion-proof valve 2 on the top surface of the battery cell 1. For example: the orthographic projection of the weak portion 31 on the top surface of the corresponding battery cell 1 coincides with the orthographic projection of the corresponding explosion-proof valve 2 on the top surface of the battery cell 1, or the orthographic projection of the explosion-proof valve 2 on the top surface of the battery cell 1 is within the range of the orthographic projection of the weak portion 31 on the top surface of the corresponding battery cell 1.
Alternatively, the orthographic projection of the weak portion 31 on the top face of the corresponding battery cell 1 coincides with the orthographic projection of the corresponding explosion-proof valve 2 on the top face of the battery cell 1.
When the orthographic projection of the weak part 31 on the top surface of the corresponding battery cell 1 coincides with the orthographic projection of the corresponding explosion-proof valve 2 on the top surface of the battery cell 1, the circumference of the weak part 31 is smaller, the connecting area of the weak part 31 and the heat insulation body 32 is smaller, so that when the jet impacts on the weak part 31 in the thermal runaway of the battery cell 1, the weak part 31 is more easily separated from the corresponding heat insulation body 32, namely the jet more easily punches through the weak part 31.
For the convenience of installation, the plane of the heat insulation component 3 is parallel to the plane of the explosion-proof valve 2.
When the first score 4 is provided at the junction of the heat insulation body 32 and the corresponding weak portion 31, the first score 4 may have the same contour shape as that of the explosion-proof valve 2, and may have an elliptical shape.
In one implementation, in order to make it easier for the discharge to punch through the weakened portion 31, the weakened portion 31 may be provided with a plurality of second scores 5, and the plurality of second scores 5 may divide the corresponding weakened portion 31 into a plurality of regions.
Specifically, in order to reduce the processing difficulty and save the processing time and cost, the plurality of second scores 5 may form a m-shape (as shown in fig. 4) or a cross shape (as shown in fig. 5) together, or, as shown in fig. 6 and 7, include two second scores 5, where the two second scores 5 are both arc-shaped, and the two second scores 5 are circumscribed.
As shown in fig. 8, the battery module includes a wire harness plate assembly 6, and in order to discharge the discharged materials of the battery cells 1, through holes 61 corresponding to the weak portions 31 are formed in the wire harness plate assembly 6; the heat insulation assembly 3 is arranged on the wiring harness board assembly 6, and the orthographic projection of each weak portion 31 on the wiring harness board assembly 6 falls into the area surrounded by the corresponding through hole 61.
Specifically, the heat insulation assembly 3 may be adhered to one surface of the wire harness plate assembly 6 facing each battery cell 1; the shape of the through-hole 61 may be oblong.
The heat insulation component 3 may include at least one of insulation and heat insulation materials such as mica sheet (which can resist temperature above 1000 ℃), ceramic sheet and glass fiber sheet, for example: the heat insulation component 3 can comprise any one or two of a mica sheet, a ceramic sheet and a glass fiber sheet; the insulation assembly 3 may also include all three of mica sheets, ceramic sheets and fiberglass sheets.
When the thermal insulation component 3 is a mica sheet, the thickness of the thermal insulation body 32 may be 0.2 mm, and the specific thickness may be set according to the requirement, which is not limited in this application.
Optionally, as shown in fig. 9, the battery module further includes: an end plate assembly 400, the end plate assembly 400 being located at an end portion in an arrangement direction of the battery cells 1 in the battery assembly 100 (a plurality of the battery cells 1 form the battery assembly 100);
the bus bar assembly 500, the bus bar assembly 500 can be integrated on the wiring harness board assembly 6, and the bus bar assembly 500 is electrically connected with the battery cell 1 in the battery assembly 100, the bus bar assembly 500 is located on the top of the battery assembly 100, and a cover plate 700 is arranged on the top of the bus bar assembly 500, and the positive pole 510 and the negative pole 520 of the bus bar assembly 500 are arranged on the same side as the connector 410 in the end board assembly 400.
As an example, the positive and negative electrodes 510 and 520 of the bus bar assembly 500 are disposed on the same side as the connector 410 in the end plate assembly 400, thereby facilitating wiring.
Optionally, the end plate assembly 400 comprises: an electrode holder 420 and a connector 410 on the electrode holder 420;
the electrode holder 420 has a positive output electrode 421 and a negative output electrode 422, the positive output electrode 421 being connected to the positive electrode 510 of the bus bar assembly 500, and the negative output electrode 422 being connected to the negative electrode 520 of the bus bar assembly 500.
As an example, the electrode holder 420 has a positive output electrode 421 and a negative output electrode 422, the positive output electrode 421 is connected to the positive electrode 510 of the busbar assembly 500, the negative output electrode 422 is connected to the negative electrode 520 of the busbar assembly 500, and the positive electrode 510 and the negative electrode 520 of the high-voltage busbar assembly 500 are disposed on the same side as the low-voltage connector 410, so that the high voltage and the low voltage are not limited to be disposed on different sides, thereby improving the diversity of the battery module and the system configuration provided by the embodiment of the present application.
Optionally, the end plate assembly 400 further comprises: and a protective cover 430, wherein the protective cover 430 is arranged on the electrode bracket 420, and a containing cavity 440 for containing the connector 410 is formed with the electrode bracket 420.
As an example, as shown in fig. 10, the end plate assembly 400 is composed of a protective cover 430 and an electrode holder 420, the protective cover 430 and the electrode holder 420 form a receiving cavity 440 for receiving the connector 410, wherein the connector 410 can be placed at a position of the receiving cavity 440 corresponding to the electrode holder 420.
As an example, a side plate 600 is provided at the other two sides of the battery module 100 except for the end plate assembly 400.
As an example, the positive output electrode 421 is placed above the supporting surface 423 of the electrode holder 420, the two planes are in free contact, the negative output electrode 422 is placed above the supporting surface 423 of the electrode holder 420, the two planes are in free contact, the assembly can realize the module-side output and isolated fixation of the negative output electrode 422 of the positive output electrode 421, the connector 410 is connected to the reinforcing plate 424 by gluing or welding, the back surface of the reinforcing plate 424 is in free contact with the surface of the electrode holder 420, the side surface of the reinforcing plate 424 is in contact with the surface of the electrode holder 420 to realize the position limitation of the connector 410, the front surface of the connector 410 is in free contact with the surface of the protective cover 430, the protective cover 430 has an opening structure 431 capable of being in contact with the buckle 425 of the electrode holder 420, meanwhile, the protective cover 430 has a guide groove to facilitate the sliding of the buckle 425 of the protective cover 430 into the inside, and similarly, the protective cover 430 has the same buckle-fit mechanism in the symmetrical direction, the connector 410 is mounted in the cavity of the electrode holder 420 and is fixed in a limited manner in each direction, together with the clip 425, to limit the position of the protective cover 430.
In this embodiment, the number of the battery cells 1 may be 24, and the bus bar assembly 500 realizes 2 parallel 12-string connection of 24 battery cells 1; of course, the number of the battery cells 1 may be adjusted according to the amount of electricity, voltage, and battery capacity.
In the present embodiment, "plural" means two or more, and "plural" means two or more.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A battery cell, comprising:
a battery body;
the explosion-proof valve is fixedly arranged at the top of the battery body, and a heat insulation unit is arranged on the explosion-proof valve;
the heat insulation unit comprises a heat insulation layer which is arranged on the explosion-proof valve;
the explosion-proof valve comprises an explosion-proof valve body and an insulating layer, and the insulating layer is arranged on one side, away from the battery body, of the explosion-proof valve body;
the heat insulation layer is arranged between the insulation layer and the explosion-proof valve body, and/or the heat insulation layer is arranged on one side of the insulation layer, which deviates from the explosion-proof valve body.
2. The battery cell as recited in claim 1, wherein the thermal insulation layer is sprayed or adhered to the corresponding insulation layer or the explosion-proof valve body.
3. The battery cell as recited in claim 1 wherein the thermal insulation layer is further an insulation layer of the explosion-proof valve.
4. The battery cell of any of claims 1-3, wherein the thermal insulation layer comprises at least one of a mica layer, a ceramic layer, and a fiberglass layer.
5. A battery module, comprising a plurality of battery cells, wherein at least one of the battery cells in the plurality of battery cells is the battery cell according to any one of claims 1-4.
6. The battery module of claim 5, comprising:
the heat insulation assembly is positioned on one side of the explosion-proof valve, which is far away from the battery body, and is used for preventing ejecta sprayed by the explosion-proof valve from causing thermal runaway of other battery monomers;
the heat insulation assembly comprises weak portions, and the weak portions correspond to the explosion-proof valves one to one.
7. The battery module according to claim 6, wherein the thermal insulation assembly includes a thermal insulation body corresponding to the weak portion, the weak portion is connected with the thermal insulation body, and a thickness of the weak portion is less than a thickness of the thermal insulation body;
or, the thermal-insulated subassembly include with the thermal-insulated body that the weak point corresponds, the weak point with thermal-insulated body coupling, just thermal-insulated body with correspond the junction of weak point is equipped with first nick.
8. The battery module according to claim 6 or 7, wherein the weakened portions cover an orthographic projection of the corresponding explosion-proof valve on the top surface of the battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021440749.5U CN213752944U (en) | 2020-07-21 | 2020-07-21 | Battery cell and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021440749.5U CN213752944U (en) | 2020-07-21 | 2020-07-21 | Battery cell and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213752944U true CN213752944U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021440749.5U Active CN213752944U (en) | 2020-07-21 | 2020-07-21 | Battery cell and battery module |
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| Country | Link |
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| CN (1) | CN213752944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114824596A (en) * | 2022-04-06 | 2022-07-29 | 星恒电源股份有限公司 | Simple square battery end cover and square battery |
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2020
- 2020-07-21 CN CN202021440749.5U patent/CN213752944U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114824596A (en) * | 2022-04-06 | 2022-07-29 | 星恒电源股份有限公司 | Simple square battery end cover and square battery |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: Kaibo Energy Technology Co.,Ltd. Address after: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee after: Kaibo Energy Technology Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY RESEARCH INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220110 Address after: 213000 No. 1, Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. |
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| TR01 | Transfer of patent right |