CN219534788U - Lithium ion battery structure - Google Patents
Lithium ion battery structure Download PDFInfo
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- CN219534788U CN219534788U CN202320654619.9U CN202320654619U CN219534788U CN 219534788 U CN219534788 U CN 219534788U CN 202320654619 U CN202320654619 U CN 202320654619U CN 219534788 U CN219534788 U CN 219534788U
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- liquid
- explosion
- pipe
- lithium ion
- liquid cooling
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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 utility model discloses a lithium ion battery structure, which comprises: the device comprises a shell, a liquid cooling assembly and a connecting tube group. The casing has the installation cavity, the battery monomer set up in the installation cavity, be provided with explosion-proof mouth on the battery monomer, explosion-proof mouth department is provided with explosion-proof valve. The liquid cooling assembly is used for cooling the battery monomers, and the liquid cooling assembly is provided with a liquid cooling pipe. The connecting pipe group is communicated with the explosion-proof port and the liquid cooling pipe, and a one-way valve for unidirectional passage of the liquid cooling pipe is arranged between the connecting pipe group and the liquid cooling pipe. The explosion-proof port and the liquid cooling pipe are communicated through the connecting pipe group, when the battery monomer is damaged, the inside high-temperature electrolyte and gas are led into the liquid cooling pipe and are fused with the cooling liquid in the liquid cooling pipe for cooling, so that the electrolyte and the gas are prevented from contacting with air, and further, the ignition is prevented.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a lithium ion battery structure.
Background
Lithium ion batteries are widely used because of their high energy, high capacity, high activity, high power, and the like. However, the battery suffers from extreme misuse, and when a short circuit occurs inside or an internal high voltage is caused by overcharge, the internal temperature of the battery increases sharply, and a large amount of gas is generated, so that the internal pressure of the battery increases. If the pressure is continuously increased and can not be released, the explosion of the battery can be caused
In the related art, a common method for solving the problems is to add an explosion-proof valve on a top cover of a lithium ion battery, gas is generated inside the lithium ion battery under the condition, and when the gas pressure inside the lithium ion battery reaches the explosion pressure of the explosion-proof valve, an explosion-proof sheet on the top cover is broken, so that the gas inside the lithium ion battery is discharged from an explosion-proof valve port, and explosion of the lithium ion battery caused by expanding gas is prevented. When the explosion-proof valve is flushed by gas, sparks, electrolyte and high-temperature vaporization liquid are simultaneously sprayed out from the gas. Because the electrolyte contains organic solvent, the sprayed electrolyte and Mars are easy to catch fire when encountering oxygen in the air at high temperature, and safety accidents are caused.
Disclosure of Invention
The utility model aims to at least solve one of the technical problems in the prior art, and therefore, the utility model provides a lithium ion battery which can treat gas sprayed by an explosion-proof valve and prevent ignition.
According to an embodiment of the utility model, a lithium ion battery structure includes:
a housing having a mounting cavity;
the battery unit is arranged in the mounting cavity, an explosion-proof port is formed in the battery unit, and an explosion-proof valve is arranged at the explosion-proof port;
the liquid cooling assembly is used for cooling the battery monomer and is provided with a liquid cooling pipe;
the connecting pipe group is communicated with the explosion-proof port and the liquid cooling pipe, and a one-way valve for unidirectional passage of the liquid cooling pipe is arranged between the connecting pipe group and the liquid cooling pipe.
The lithium ion battery structure provided by the embodiment of the utility model has at least the following beneficial effects:
the explosion-proof port is connected with the liquid cooling pipe through the connecting pipe group, when the battery monomer is damaged, the inside high-temperature electrolyte and gas are guided into the liquid cooling pipe and are fused with the cooling liquid in the liquid cooling pipe for cooling, so that the electrolyte and the gas are prevented from contacting with air, and further, the ignition is prevented.
In some embodiments of the present utility model, the connection tube group includes a plurality of square tubes and a conduit, a plurality of battery packs are disposed in the installation cavity at intervals along the up-down direction of the housing, each battery pack includes a plurality of battery cells disposed at intervals along the left-right direction of the housing, one square tube is disposed in each battery pack, the square tubes connect all explosion-proof ports in the battery packs, and the conduit connects the square tubes.
In some embodiments of the present utility model, a plurality of openings aligned with the explosion-proof ports are formed in the end, facing the battery cells, of the square tube, and an annular flange is arranged on the square tube around the openings, and the annular flange abuts against the battery cells so that the explosion-proof ports are communicated with the square tube.
In some embodiments of the utility model, the annular flange is provided with a sealing ring near the end face of the battery cell.
In some embodiments of the present utility model, a first mounting portion is respectively provided at two ends of the square tube in the length direction, a second mounting portion matched with the first mounting portion is provided on the housing, and the square tube is connected with the housing through the first mounting portion and the second mounting portion.
In some embodiments of the present utility model, the first mounting portion is provided with a through hole, the second mounting portion is provided with a waist-shaped hole extending in a vertical direction, and a bolt assembly is inserted into the through hole and the waist-shaped hole to fasten the square tube.
In some embodiments of the present utility model, the square tube is provided with a plurality of positioning portions at intervals along a length direction thereof, a positioning groove is defined between two adjacent positioning portions, and the battery cell is clamped in the positioning groove, so that the explosion-proof opening is aligned with the opening.
In some embodiments of the present utility model, the liquid cooling assembly includes a plurality of heat conducting plates, and an installation space is defined between two adjacent battery cells along a thickness direction of the battery cells, the heat conducting plates are disposed in the installation space, a first pipeline is disposed inside the heat conducting plates, a liquid inlet communicated with the first pipeline is disposed at an upper portion of the heat conducting plates, and a liquid outlet connected with the first pipeline is disposed at a lower portion of the heat conducting plates.
In some embodiments of the present utility model, the liquid cooling pipe includes a liquid feeding pipe and a liquid return pipe, the liquid feeding pipe is communicated with the plurality of liquid inlets, the liquid feeding pipe is communicated with the plurality of liquid outlets, and the conduction pipe is communicated with the liquid return pipe.
In some embodiments of the present utility model, the liquid cooling assembly further includes a liquid storage tank, a heat dissipation plate, and a circulation pump, wherein a second pipeline is disposed in the heat dissipation plate, the liquid return pipe is connected to an inlet end of the second pipeline, an outlet end of the second pipeline is connected to the liquid storage tank, an output end of the circulation pump is connected to the liquid feeding pipe, and an input end of the circulation pump is connected to the liquid storage tank.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
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 schematic view of the square tube in the embodiment of FIG. 1;
fig. 3 is a schematic structural diagram of the battery cell in the embodiment of fig. 1.
Reference numerals:
a housing 100, a second mounting portion 110, a waist-shaped hole 120,
Battery cell 200, explosion-proof port 210, liquid injection port 220, positive electrode column 230, negative electrode column 240,
Liquid cooling assembly 300, liquid cooling pipe 310, liquid feeding pipe 311, liquid returning pipe 312, heat conducting plate 320,
The connecting tube group 400, the square tube 410, the opening 411, the annular flange 412, the seal 413, the first mounting portion 414, the through hole 415, the positioning portion 416, and the conduction tube 420.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1, the new lithium ion battery structure of the present utility model includes a housing 100, a battery cell 200, a liquid cooling assembly 300 and a connection stack 400.
The housing 100 includes five plates, and a mounting cavity having an opening 411 is defined between the five plates, so that the housing 100 has a simple structure.
The battery cell 200 is arranged in the installation cavity, so that the damage to the battery cell 200 from the outside can be prevented, the explosion-proof opening 210 is arranged on the battery cell 200, and the explosion-proof valve is arranged at the explosion-proof opening 210.
The liquid cooling assembly 300 is used to cool the battery cell 200, and it is understood that a great amount of heat is generated in the lithium ion battery during use, and if the heat is not discharged timely, the temperature of the battery cell 200 increases, which greatly affects the performance of the lithium ion battery. The cooling of the battery cell 200 can be performed efficiently by the liquid cooling assembly 300. The liquid cooling assembly 300 includes a liquid cooling tube 310, the liquid cooling tube 310 being used for conveying a cooling liquid.
The connection tube group 400 is used for communicating the explosion-proof port 210 with the liquid cooling tube 310, and a check valve for unidirectional passage to the liquid cooling tube 310 is provided between the connection tube group 400 and the liquid cooling tube 310. In this way, when the gas or liquid in the battery cell 200 is discharged through the explosion-proof port 210, it can be introduced into the liquid-cooled tube 310 through the connection tube set 400 to cool down, and some of the gas is absorbed by the cooling liquid. The electrolyte sprayed from the explosion-proof port 210 can be prevented from burning or contaminating the surrounding environment by contacting with air. The coolant in the liquid cooling pipe 310 can be prevented from flowing backward into the inside of the battery cell 200 by providing a check valve.
In some embodiments of the present utility model, the connection tube set 400 includes a plurality of square tubes 410 and a conductive tube 420, a plurality of battery packs are disposed in the installation cavity at intervals along the up-down direction of the housing 100, each battery pack includes a plurality of battery cells 200 disposed at intervals along the left-right direction of the housing 100, one square tube 410 is disposed in each battery pack, the square tubes 410 communicate all the explosion-proof ports 210 in the battery pack, and the conductive tube 420 communicates the plurality of square tubes 410. It can be appreciated that the plurality of explosion vents 210 in each battery pack are connected through the square pipe 410, so that the explosion vents 210 of each battery cell 200 are not required to be separately connected with the liquid cooling pipe 310, the structure is simplified, and the cost is saved.
Referring to fig. 2, in some embodiments of the present application, a plurality of openings 411 aligned with the explosion-proof openings 210 are formed at one end of the square tube 410 facing the battery cell 200, an annular flange 412 is disposed on the square tube 410 around the openings 411, and the annular flange 412 abuts against the battery cell 200 so that the explosion-proof openings 210 are communicated with the square tube 410. It can be appreciated that the end face of the square tube 410 where the explosion-proof opening 210 is located in the battery cell 200 is abutted to realize tight connection between the explosion-proof opening 210 and the square tube 410, and through the arrangement of the annular flange 412, one end, close to the battery cell 200, of the annular flange 412 is matched with the battery cell 200 to realize sealing, so that large-plane matching is prevented, required precision requirements are reduced, processing difficulty is reduced, and risks of connection untightness caused by uneven large planes can be reduced.
Referring to fig. 2, the annular flange 412 is provided with a seal 413 near the end surface of the battery cell 200, and it is understood that the seal 413 can improve the connection tightness between the square pipe 410 and the explosion-proof port 210, and prevent leakage.
Referring to fig. 1, in some embodiments of the present utility model, first mounting portions 414 are provided at both ends of a square tube 410 in a longitudinal direction, and a second mounting portion 110 is provided on a housing 100 to be fitted with the first mounting portion 414, and the square tube 410 is connected to the housing 100 by the first mounting portion 414 and the second mounting portion 110. The square tube 410 and the housing 100 are connected by the first connection part and the second connection part, so that the connection stability between the opening 411 of the square tube 410 and the explosion-proof port 210 is realized, and the occurrence of the loose leakage is ensured.
Referring to fig. 1 and 2, in some embodiments of the present utility model, a through hole 415 is provided on a first mounting portion 414, a waist-shaped hole 120 extending in a vertical direction is provided on a second mounting portion 110, and a bolt assembly is inserted into the through hole 415 and the waist-shaped hole 120 to fasten the square tube 410. It will be appreciated that by adjusting the position of the bolt assembly in the kidney-shaped hole 120, the mounting height of the square tube 410 can be adjusted so that the opening 411 of the square tube 410 can be aligned in the vertical direction with the explosion vent 210 to accommodate certain manufacturing and mounting errors.
In some embodiments of the present utility model, the first mounting portion 414 and the second mounting portion 110 are directly welded, improving the reliability of the connection.
Referring to fig. 1 and 2, in some embodiments of the present utility model, a plurality of positioning portions 416 are disposed on the square tube 410 along the length direction thereof at intervals, a positioning groove is defined between two adjacent positioning portions 416, and the battery cell 200 is clamped in the positioning groove, so that the explosion-proof opening 210 is aligned with the opening 411. It can be appreciated that by restricting the battery cell 200 between the adjacent two positioning portions 416, it is possible to ensure that the explosion-proof port 210 of the battery cell 200 is aligned in the horizontal direction with the opening 411 of the square tube 410.
Referring to fig. 1, in some embodiments of the present utility model, the liquid cooling assembly 300 includes a plurality of heat conductive plates 320, and the heat conductive plates 320 can absorb heat generated from the battery cells 200 to keep the temperature of the battery cells 200 stable. Along the thickness direction of the battery cells 200, an installation space is defined between adjacent two battery cells 200, and the heat conductive plate 320 is installed in the installation space. In this manner, the heat conductive plate 320 can absorb heat generated from the battery cells 200 at both sides thereof at the same time. The heat conductive plate 320 is provided inside with a first pipe through which cooling flows and which takes away heat absorbed by the heat conductive plate 320. The first pipe is reciprocally bent inside the heat conductive plate 320 to cover most of the area of the heat conductive plate 320, so that the coolant in the first pipe can conveniently take away the heat of the heat conductive plate 320. The upper part of the heat-conducting plate 320 is provided with a liquid inlet communicated with the first pipeline, and the lower part is provided with a liquid outlet connected with the first pipeline. The liquid inlet is arranged above, and the cooling liquid can smoothly flow under the action of gravity. The thickness direction of the battery cell 200 is the left-right direction shown in fig. 3.
Referring to fig. 1, in some embodiments of the present utility model, the liquid cooling pipe 310 includes a liquid feeding pipe 311 and a liquid return pipe 312, the liquid feeding pipe 311 is connected to a plurality of liquid inlets, the liquid feeding pipe 311 is connected to a plurality of liquid outlets, and the conducting pipe 420 is connected to the liquid return pipe 312. It can be appreciated that the conducting pipe 420 is communicated with the liquid return pipe 312, and the electrolyte and the gas from the explosion-proof port 210 directly flow back to the liquid storage tank for treatment.
Referring to fig. 2, in some embodiments of the present utility model, the liquid cooling assembly 300 further includes a liquid storage tank, a heat dissipation plate, and a circulation pump, wherein a second pipe is disposed in the heat dissipation plate, the liquid return pipe 312 is connected to an inlet end of the second pipe, an outlet end of the second pipe is connected to the liquid storage tank, an output end of the circulation pump is connected to the liquid feeding pipe 311, and an input end of the circulation pump is connected to the liquid storage tank. Specifically, heat radiating fins are arranged on two side surfaces of the heat radiating plate in the thickness direction so as to strengthen heat radiation. The circulation pump conveys the cooling liquid in the liquid storage tank to the heat conducting plate 320, and the cooling liquid enters the second pipeline of the heat radiating plate from the liquid return pipe 312 and returns to the liquid storage tank after being cooled so as to realize circulation. The liquid return port is communicated with the heat dissipation plate, high-temperature electrolyte and gas sprayed out of the explosion-proof port 210 can enter the heat dissipation plate to cool, and the high-temperature electrolyte and the gas can return to the liquid storage tank to improve safety.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. A lithium ion battery structure, comprising:
a housing (100) having a mounting cavity;
the battery unit (200) is arranged in the mounting cavity, an explosion-proof opening (210) is formed in the battery unit (200), and an explosion-proof valve is arranged at the explosion-proof opening (210);
a liquid cooling assembly (300) for cooling the battery cell (200), the liquid cooling assembly (300) having a liquid cooling tube (310);
the connecting tube group (400), the connecting tube group (400) is communicated with the explosion-proof port (210) and the liquid cooling tube (310), and a one-way valve which is used for unidirectional passage of the liquid cooling tube (310) is arranged between the connecting tube group (400) and the liquid cooling tube (310).
2. A lithium ion battery structure according to claim 1, wherein,
the connecting tube group (400) comprises a plurality of square tubes (410) and a conducting tube (420), a plurality of battery packs are arranged in the mounting cavity along the vertical direction of the shell (100) at intervals, each battery pack comprises a plurality of battery cells (200) arranged along the left and right directions of the shell (100) at intervals, each battery pack is internally provided with one square tube (410), all explosion-proof ports (210) in the battery packs are communicated by the square tubes (410), and a plurality of square tubes (410) are communicated by the conducting tube (420).
3. A lithium ion battery structure according to claim 2, wherein,
the utility model discloses a battery cell, including side's pipe (410), explosion-proof mouth (210) and side's pipe (410), side's pipe (410) orientation one end offer a plurality of respectively with explosion-proof mouth (210) one-to-one opening (411), side's pipe (410) are last encircle opening (411) are provided with annular flange (412), annular flange (412) butt battery cell (200) so that explosion-proof mouth (210) with side's pipe (410) intercommunication.
4. A lithium ion battery structure according to claim 3, wherein,
the annular flange (412) is provided with a sealing ring (413) near the end face of the battery cell (200).
5. A lithium ion battery structure according to claim 2, wherein,
the square tube (410) is provided with first installation department (414) respectively at the both ends of square tube (410) length direction, be provided with on casing (100) with second installation department (110) that first installation department (414) cooperated, square tube (410) pass through first installation department (414) with second installation department (110) with casing (100) are connected.
6. A lithium ion battery structure according to claim 5, wherein,
the first installation part (414) is provided with a through hole (415), the second installation part (110) is provided with a waist-shaped hole (120) extending along the vertical direction, and the bolt component is arranged in the through hole (415) and the waist-shaped hole (120) in a penetrating mode to fasten the square pipe (410).
7. A lithium ion battery structure according to claim 3, wherein,
the square tube (410) is provided with a plurality of positioning parts (416) along the length direction at intervals, a positioning groove is defined between two adjacent positioning parts (416), and the battery unit (200) is clamped in the positioning groove, so that the explosion-proof opening (210) is aligned with the opening (411).
8. A lithium ion battery structure according to claim 2, wherein,
the liquid cooling assembly (300) comprises a plurality of heat conducting plates (320), an installation space is defined between two adjacent battery monomers (200) along the thickness direction of the battery monomers (200), the heat conducting plates (320) are arranged in the installation space, a first pipeline is arranged inside the heat conducting plates (320), the upper parts of the heat conducting plates (320) are provided with liquid inlets communicated with the first pipeline, and the lower parts of the heat conducting plates are provided with liquid outlets connected with the first pipeline.
9. The lithium ion battery structure of claim 8, wherein the lithium ion battery is configured to provide the lithium ion battery,
the liquid cooling pipe (310) comprises a liquid feeding pipe (311) and a liquid return pipe (312), wherein the liquid feeding pipe (311) is communicated with a plurality of liquid inlets, the liquid feeding pipe (311) is communicated with a plurality of liquid outlets, and the conducting pipe (420) is communicated with the liquid return pipe (312).
10. A lithium ion battery structure according to claim 9, wherein,
the liquid cooling assembly (300) further comprises a liquid storage tank, a heat dissipation plate and a circulating pump, wherein a second pipeline is arranged in the heat dissipation plate, the liquid return pipe (312) is communicated with the inlet end of the second pipeline, the outlet end of the second pipeline is communicated with the liquid storage tank, the output end of the circulating pump is communicated with the liquid feeding pipe (311), and the input end of the circulating pump is communicated with the liquid storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320654619.9U CN219534788U (en) | 2023-03-29 | 2023-03-29 | Lithium ion battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320654619.9U CN219534788U (en) | 2023-03-29 | 2023-03-29 | Lithium ion battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219534788U true CN219534788U (en) | 2023-08-15 |
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ID=87584800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320654619.9U Active CN219534788U (en) | 2023-03-29 | 2023-03-29 | Lithium ion battery structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219534788U (en) |
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2023
- 2023-03-29 CN CN202320654619.9U patent/CN219534788U/en active Active
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