CN218472028U - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
- Publication number
- CN218472028U CN218472028U CN202222780729.8U CN202222780729U CN218472028U CN 218472028 U CN218472028 U CN 218472028U CN 202222780729 U CN202222780729 U CN 202222780729U CN 218472028 U CN218472028 U CN 218472028U
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- China
- Prior art keywords
- lithium ion
- ion battery
- temperature coefficient
- negative
- tab
- 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.)
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 33
- 238000004804 winding Methods 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 8
- 230000004308 accommodation Effects 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- 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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model belongs to the technical field of the battery, specifically disclose a lithium ion battery, which comprises an outer shell, roll up core and negative temperature coefficient thermistor, roll up the core and install in the accommodation space of shell, through rolling up negative temperature coefficient thermistor and roll up a core parallelly connected, so that lithium ion battery is when charging, along with the rising of temperature, negative temperature coefficient thermistor's internal resistance reduces, through negative temperature coefficient thermistor's current increase, on the produced most heat of charging current shifts negative temperature coefficient thermistor, roll up the temperature of core and reduce relatively, thereby played certain guard action to rolling up the core, prolong its life. And the negative temperature coefficient thermistor is led out to the outer side of the shell through a wire and the like, heat generated by the negative temperature coefficient thermistor can be quickly dissipated, the cooling effect is good, the structure is simple, the processing is easy, and the cost is low.
Description
Technical Field
The utility model relates to the technical field of batteries, especially, relate to a lithium ion battery.
Background
Since the heat is proportional to the square of the current, when the lithium ion battery is charged under a large current, a large amount of heat is accumulated in the battery, which causes the temperature of the battery to rise, and if the battery is in a high-temperature state for a long time, the capacity exertion and the cycle life of the battery are affected.
The method for reducing the temperature rise of the battery mainly comprises the steps of reducing the charging current and reducing the internal resistance, if the charging current is reduced, the charging time is inevitably prolonged, the user experience is poor, and the internal resistance is reduced.
Therefore, a lithium ion battery is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a lithium ion battery, it reduces lithium ion battery's internal resistance through rolling up the parallelly connected mode of core and negative temperature coefficient thermistor, simple structure, and processing is easy, and the cost is lower.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a lithium ion battery, this lithium ion battery includes:
the shell is internally provided with an accommodating space;
the winding core is arranged in the accommodating space, the positive electrode of the winding core is connected with the positive electrode lug, and the negative electrode of the winding core is connected with the negative electrode lug; and
and two ends of the negative temperature coefficient thermistor are respectively connected with the positive lug and the negative lug.
Optionally, the winding core is provided in a plurality, and the winding core and the negative temperature coefficient thermistor are arranged in parallel.
Optionally, the housing includes a housing and a cover plate, the cover plate is fastened to the housing, the cover plate is connected to the housing in a sealing manner, and the housing and the cover plate jointly enclose the accommodating space.
Optionally, a through hole is formed in the cover plate, the negative temperature coefficient thermistor is connected with the positive electrode lug and the negative electrode lug through a lead, the negative temperature coefficient thermistor penetrates out of the through hole, and the negative temperature coefficient thermistor is fixed to the cover plate.
Optionally, a gap between the through hole and the negative temperature coefficient thermistor is sealed and fixed by glue.
Optionally, the cover plate is provided with a positive plate and a negative plate, the positive plate is connected with the positive tab of the winding core, and the negative plate is connected with the negative tab of the winding core.
Optionally, a liquid injection hole is formed in the cover plate, and the liquid injection hole is configured to fill the accommodating space with electrolyte.
Optionally, an explosion-proof valve is arranged on the cover plate.
Optionally, the positive tab is an aluminum tab.
Optionally, the negative electrode tab is made of a copper tab or a copper-nickel tab.
The utility model has the advantages that:
the utility model provides a lithium ion battery, this lithium ion battery includes the shell, roll up core and negative temperature coefficient thermistor, roll up the core and install in the accommodation space of shell, the positive pole and the positive ear of rolling up the core are connected, the negative pole and the negative pole ear of rolling up the core are connected, negative temperature coefficient thermistor's both ends are connected with positive ear and negative pole ear respectively, negative temperature coefficient thermistor parallels with rolling up the core, when lithium ion battery charges, along with charging current's increase, it can produce the temperature rising in the accommodation space to roll up the core, along with the rising of temperature, negative temperature coefficient thermistor's internal resistance reduces, through negative temperature coefficient thermistor's current increase, on most heat transfer negative temperature coefficient thermistor of charging current production, the temperature of rolling up the core reduces relatively, thereby certain guard action has been played to rolling up the core, prolong its life. And the negative temperature coefficient thermistor is led out to the outer side of the shell through a lead and the like, so that heat generated by the negative temperature coefficient thermistor can be quickly dissipated, the cooling effect is good, and the negative temperature coefficient thermistor and the winding core are simple in connection structure, easy to process and low in cost.
Drawings
Fig. 1 is a schematic structural diagram of a lithium ion battery provided in an embodiment of the present invention;
fig. 2 is a schematic circuit connection diagram of an internal component of a lithium ion battery provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cover plate provided in an embodiment of the present invention.
In the figure:
100. a winding core; 110. a positive tab; 120. a negative tab; 200. a negative temperature coefficient thermistor; 300. a cover plate; 320. a liquid injection hole; 330. a positive plate; 340. a negative plate; 350. an explosion-proof valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, this embodiment provides a lithium ion battery, this lithium ion battery includes the shell, roll core 100 and negative temperature coefficient thermistor 200, be equipped with the accommodation space in the shell, roll up core 100 and install in the accommodation space, the positive pole that rolls core 100 is connected with anodal ear 110, the negative pole that rolls core 100 is connected with negative pole ear 120, negative temperature coefficient thermistor 200's both ends are connected with anodal ear 110 and negative pole ear 120 respectively, it has certain internal resistance to roll core 100, negative temperature coefficient thermistor 200 is parallelly connected with roll core 100, when lithium ion battery charges, along with charging current's increase, roll core 100 can produce certain heat and cause the temperature rise in the accommodation space, because negative temperature coefficient thermistor 200's own characteristic is: with the rise of the temperature, the internal resistance of the negative temperature coefficient thermistor 200 is reduced, and because the negative temperature coefficient thermistor 200 is connected with the winding core 100 in parallel, the current passing through the negative temperature coefficient thermistor 200 is increased, most of the heat generated by the charging current is transferred to the negative temperature coefficient thermistor 200, and the temperature of the winding core 100 is relatively reduced, so that the winding core 100 is protected to a certain extent, and the service life of the winding core 100 is prolonged. The NTC thermistor 200 can be led out to the outside of the case through a wire or the like, so that heat generated by the NTC thermistor 200 can be rapidly dissipated, and the cooling effect is good.
Alternatively, the positive electrode tab 110 in this embodiment is an aluminum tab, and the negative electrode tab 120 is a copper tab or a copper-nickel tab. Of course, in other embodiments, the positive electrode tab 110 and the negative electrode tab 120 may be made of other conductive materials, which is not limited in this embodiment.
In some embodiments, the lithium ion battery includes a plurality of winding cores 100, and the plurality of winding cores 100 are disposed in the accommodating chamber, which is described herein by taking an example that the ntc thermistor 200 is connected in parallel with the plurality of winding cores 100. As shown in fig. 2, the internal resistances of the winding cores 100 may be denoted as R1, R2, and R3 … … Rn, the internal resistance of the negative temperature coefficient thermistor 200 is denoted as Rt, and R1, R2, R3 … … Rn, and Rt are connected in parallel.
Of course, in some embodiments, the winding cores 100 of the lithium ion battery may be connected in series and then connected in parallel with the ntc thermistor 200, which is not limited in this embodiment.
Further, the housing in this embodiment includes a housing and a cover plate 300, the cover plate 300 is fastened on the housing, the cover plate 300 and the housing are connected in a sealing manner, the housing and the cover plate 300 together enclose an accommodating space, and the housing may be made of an aluminum material. Referring to fig. 3, in the present embodiment, a through hole is formed in the cover plate 300, and after the ntc thermistor 200 is connected to the positive tab 110 and the negative tab 120 through wires, the ntc thermistor 200 is inserted through the through hole and fixed to the cover plate 300. On the one hand, expose negative temperature coefficient thermistor 200 outside the shell, increased negative temperature coefficient thermistor 200's heat radiating area, be favorable to improving the radiating effect, on the other hand, because the shell adopts aluminium material to make, its heat conductivility is good, negative temperature coefficient thermistor 200 can pass through the shell with the heat and give off fast, and the heat dissipation cooling is respond well.
In order to prevent the electrolyte from flowing out through the gap between the through hole and the ntc thermistor 200, after the ntc thermistor 200 is connected to the positive tab 110 and the negative tab 120 of the winding core 100, the ntc thermistor 200 is inserted through the through hole and fixed to the through hole, and then the gap between the ntc thermistor 200 and the through hole is filled with glue, thereby sealing the gap between the ntc thermistor 200 and the through hole.
Alternatively, the cover plate 300 is provided with a positive tab 330 and a negative tab 340, the positive tab 330 is connected to the positive tab 110 of the winding core 100, and the negative tab 340 is connected to the negative tab 120 of the winding core 100, so that the two ends of the negative temperature coefficient thermistor 200 are also in conductive communication with the positive tab 330 and the negative tab 340 of the cover plate 300.
Further, the cover plate 300 of the present embodiment is provided with a liquid injection hole 320, and the electrolyte can be filled into the accommodating space through the liquid injection hole 320. The cover plate 300 is further provided with an explosion-proof valve 350, when the roll core 100 is overheated and the pressure inside the shell is increased sharply, gas and the like can be discharged from the explosion-proof valve 350, so that the explosion of the lithium ion battery is avoided, the safety performance of the lithium ion battery is improved, and the protection of the life safety of users is facilitated.
It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A lithium ion battery, comprising:
the shell is internally provided with an accommodating space;
the winding core (100) is installed in the accommodating space, the positive electrode of the winding core (100) is connected with the positive electrode lug (110), and the negative electrode of the winding core (100) is connected with the negative electrode lug (120); and
and the two ends of the negative temperature coefficient thermistor (200) are respectively connected with the positive tab (110) and the negative tab (120).
2. The lithium ion battery according to claim 1, wherein a plurality of winding cores (100) are provided, and each winding core (100) is provided in parallel with the negative temperature coefficient thermistor (200).
3. The lithium ion battery according to claim 1, wherein the housing comprises a shell and a cover plate (300), the cover plate (300) is fastened on the shell, the cover plate (300) and the shell are hermetically connected, and the shell and the cover plate (300) jointly enclose the accommodating space.
4. The lithium ion battery of claim 3, wherein a through hole is formed in the cover plate (300), the NTC thermistor (200) is connected with the positive tab (110) and the negative tab (120) through a lead, the NTC thermistor (200) penetrates through the through hole, and the NTC thermistor (200) is fixed on the cover plate (300).
5. The lithium ion battery according to claim 4, wherein the gap between the through hole and the negative temperature coefficient thermistor (200) is fixed by glue sealing.
6. The lithium ion battery according to claim 3, wherein a positive plate (330) and a negative plate (340) are arranged on the cover plate (300), the positive plate (330) is connected with the positive tab (110) of the winding core (100), and the negative plate (340) is connected with the negative tab (120) of the winding core (100).
7. The lithium ion battery according to claim 3, wherein a liquid injection hole (320) is formed in the cover plate (300), and the liquid injection hole (320) is configured to fill the accommodating space with the electrolyte.
8. The lithium ion battery according to claim 3, characterized in that the cover plate (300) is provided with an explosion-proof valve (350).
9. The lithium ion battery according to any one of claims 1-8, characterized in that the positive tab (110) is an aluminum tab.
10. The lithium ion battery according to any of claims 1-8, characterized in that the negative electrode tab (120) is made of a copper tab or a copper nickel tab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222780729.8U CN218472028U (en) | 2022-10-21 | 2022-10-21 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222780729.8U CN218472028U (en) | 2022-10-21 | 2022-10-21 | Lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218472028U true CN218472028U (en) | 2023-02-10 |
Family
ID=85147479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222780729.8U Active CN218472028U (en) | 2022-10-21 | 2022-10-21 | Lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218472028U (en) |
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2022
- 2022-10-21 CN CN202222780729.8U patent/CN218472028U/en active Active
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| GR01 | Patent grant |