CN212934692U - Lithium battery with protection board - Google Patents
Lithium battery with protection board Download PDFInfo
- Publication number
- CN212934692U CN212934692U CN202022054416.5U CN202022054416U CN212934692U CN 212934692 U CN212934692 U CN 212934692U CN 202022054416 U CN202022054416 U CN 202022054416U CN 212934692 U CN212934692 U CN 212934692U
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- Prior art keywords
- lithium battery
- protection
- battery cell
- lug
- protection circuit
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a lithium battery with a protection board, which comprises a protection board provided with a protection circuit, a lithium battery cell and a metal soldering lug; the metal soldering lug is arranged on the protection plate and is connected with the protection circuit; the positive electrode and the negative electrode of the lithium battery cell are both connected with the protection circuit; and the positive lug and the negative lug of the lithium battery cell are both welded with the metal soldering lug in a spot welding manner, so that the lithium battery cell is connected with the protection circuit. The utility model discloses the lithium cell with protection shield can realize stablizing and effectively being connected with the protection shield to guarantee the working property of lithium cell.
Description
Technical Field
The utility model relates to a battery manufacturing technical field, more specifically say, relate to a lithium cell with protection shield.
Background
The lithium battery has the obvious advantages of high energy density, miniaturization, ultra-thinness, light weight, high safety, low cost and the like, is a novel battery, and can be widely applied to mobile electric appliances such as mobile phones, palm computers and the like. The lithium battery becomes increasingly prominent energy power by virtue of the outstanding characteristics of small volume, large capacity, large specific energy, no memory and the like.
Since the lithium battery cannot be used alone, it is very necessary to design a corresponding protection device for the lithium battery. The reliability of the lithium battery protection device can determine the use safety and the service life of the lithium battery protection device to a great extent. Most of the conventional lithium battery protection devices employ a protection plate having functions such as charge/discharge protection. However, it is one of the directions to be studied how to ensure the lithium battery is effectively and stably connected with the protection board so that the protection board can protect the lithium battery.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a lithium battery with a protection plate; the lithium battery can be stably and effectively connected with the protection board, so that the working performance of the lithium battery is guaranteed.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a lithium battery with a protection board is characterized in that: the lithium battery comprises a protection board provided with a protection circuit, a lithium battery cell and a metal soldering lug; the metal soldering lug is arranged on the protection plate and is connected with the protection circuit; the positive electrode and the negative electrode of the lithium battery cell are both connected with the protection circuit; and the positive lug and the negative lug of the lithium battery cell are both welded with the metal soldering lug in a spot welding manner, so that the lithium battery cell is connected with the protection circuit.
Traditional lithium cell structure adopts soldering tin technology to weld protection shield and lithium cell electricity core, not only has high requirements to operation personnel's technical ability, and phenomena such as rosin joint and pseudo-soldering appear in addition easily, and the tin point tin thorn that also appears produces pierces through the safety problem of lithium cell electricity core easily. For traditional lithium cell structure, the utility model discloses a metal soldering lug is as the connecting piece of lithium cell electricity core and protection shield, adopts the mode of spot welding moreover, not only makes operation personnel easy to operate, can improve production efficiency, can prevent effectively moreover that the false welding from taking off the welding and causing the phenomenon that lithium cell functionality is bad, has stopped tin point tin thorn and has pierced through the potential safety hazard problem of lithium cell electricity core to improve the firm and effective connection of lithium cell electricity core and protection shield, guarantee the working property of lithium cell. Additionally, the utility model discloses the lithium cell structure adopts the structural style of metal soldering lug spot welding, can make protection circuit welding heated time short to guarantee protection circuit's working property.
The metal soldering lug is a nickel soldering lug.
The protection board is arranged on the end face of the lithium battery cell in a folding mode through the positive electrode lug and the negative electrode lug of the lithium battery cell. This design makes protection shield and lithium cell electricity core become an organic whole structure and packs, can reduce the volume of lithium cell.
The protection circuit is formed by connecting a main control device U1, a field effect transistor M1 for discharge control, a field effect transistor M2 for charge control and a peripheral circuit. The utility model discloses the protection circuit of protection shield passes through control field effect transistor M1 and the work of field effect transistor M2 for protection circuit overcharges to lithium cell electricity core and detects and overdischarge the detection.
The utility model also comprises a sampling resistor R1; and a port VDD of the main control device U1 is respectively connected with the anode and the anode tab of the lithium battery cell by adopting a resistor R1.
The utility model also comprises a capacitor C1 for preventing interference; and a port VDD of the main control device U1 is connected with a negative pole ear of a lithium battery cell through a capacitor C1.
The utility model also comprises a sampling resistor R2; and a port VM of the main control device U1 is connected with the cathode of the lithium battery cell through a sampling resistor R2.
Compared with the prior art, the utility model has the advantages of as follows and beneficial effect: the utility model discloses the lithium cell with protection shield can realize stablizing and effectively being connected with the protection shield to guarantee the working property of lithium cell.
Drawings
Fig. 1 is a schematic diagram of the connection between the protection plate and the lithium battery cell of the present invention;
fig. 2 is a circuit diagram of the protection circuit of the present invention;
wherein, 1 is a protection circuit, 2 is a protection board, 3 is a lithium battery core, 4 is a nickel soldering lug, 5 is an anode, 6 is a cathode, 7 is an anode lug, and 8 is a cathode lug.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 and fig. 2, the utility model discloses lithium cell with protection shield is including protection shield 2, lithium cell electricity core 3 and the nickel soldering lug 4 that are provided with protection circuit 1, wherein, nickel soldering lug 4 sets up on protection shield 2 to be connected with protection circuit 1, lithium cell electricity core 3's anodal 5 and negative pole 6 all are connected with protection circuit 1, lithium cell electricity core 3's anodal ear 7 and negative pole ear 8 all with 4 spot welding of nickel soldering lug, realize being connected with protection circuit 1.
The utility model discloses a positive tab 7 and negative pole ear 8 of 2 accessible lithium battery electricity cores of protection shield set up on lithium battery electricity core 3's terminal surface with folding mode, and this design makes protection shield 2 and lithium battery electricity core 3 structure as an organic whole pack, can reduce the volume of lithium cell.
The utility model discloses a protection circuit 1 comprises master control device U1, field effect transistor M1 that is used for discharge control, field effect transistor M2 and the peripheral circuit connection that is used for charge control. The utility model discloses protection circuit 1 of protection shield 2 is through control field effect transistor M1 and field effect transistor M2 work for protection circuit 1 overcharges to lithium cell electricity core 3 and detects and overdischarge the detection.
The utility model discloses still include sampling resistor R1, master control device U1's port VDD is connected with anodal 5(P +) and anodal ear 7(B +) of lithium cell electricity core 3 respectively through adopting resistance R1.
The utility model discloses still including the electric capacity C1 that is used for the jam-proof, master control device U1's port VDD passes through electric capacity C1 and is connected with lithium cell electricity core 3's negative pole ear 8 (B-).
The utility model discloses still include sampling resistor R2, master control device U1's port VM passes through sampling resistor R2 and is connected with lithium cell electricity core 3's negative pole 6 (P-).
Traditional lithium cell structure adopts soldering tin technology to weld protection shield and lithium cell electricity core, not only has high requirements to operation personnel's technical ability, and phenomena such as rosin joint and pseudo-soldering appear in addition easily, and the tin point tin thorn that also appears produces pierces through the safety problem of lithium cell electricity core easily. For traditional lithium cell structure, the utility model discloses a nickel soldering lug 4 is as lithium cell electricity core 3 and protection shield 1's connecting piece, adopts the mode of spot welding moreover, not only makes the operation personnel easy to operate, can improve production efficiency, can prevent effectively in addition that the false welding desolder from causing the functional bad phenomenon of lithium cell, has stopped tin point tin thorn and has pierced through the potential safety hazard problem of lithium cell electricity core to improve lithium cell electricity core 3 and protection shield 2 and stabilize and effectively be connected, guarantee the working property of lithium cell. Additionally, the utility model discloses the lithium cell structure adopts the structural style of 4 spot welding of nickel soldering lug, can make protection circuit 1 welding heated time short to guarantee protection circuit 1's working property.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (7)
1. A lithium battery with a protection board is characterized in that: the lithium battery comprises a protection board provided with a protection circuit, a lithium battery cell and a metal soldering lug; the metal soldering lug is arranged on the protection plate and is connected with the protection circuit; the positive electrode and the negative electrode of the lithium battery cell are both connected with the protection circuit; and the positive lug and the negative lug of the lithium battery cell are both welded with the metal soldering lug in a spot welding manner, so that the lithium battery cell is connected with the protection circuit.
2. A lithium battery with a protective plate as claimed in claim 1, characterized in that: the metal soldering lug is a nickel soldering lug.
3. A lithium battery with a protective plate as claimed in claim 1, characterized in that: the protection board is arranged on the end face of the lithium battery cell in a folding mode through the positive electrode lug and the negative electrode lug of the lithium battery cell.
4. A lithium battery with a protective plate as claimed in claim 1, characterized in that: the protection circuit is formed by connecting a main control device U1, a field effect transistor M1 for discharge control, a field effect transistor M2 for charge control and a peripheral circuit.
5. The lithium battery with a protection plate as claimed in claim 4, wherein: the sampling resistor R1 is also included; and a port VDD of the main control device U1 is respectively connected with the anode and the anode tab of the lithium battery cell by adopting a resistor R1.
6. The lithium battery with a protection plate as claimed in claim 4, wherein: a capacitor C1 for preventing interference; and a port VDD of the main control device U1 is connected with a negative pole ear of a lithium battery cell through a capacitor C1.
7. The lithium battery with a protection plate as claimed in claim 4, wherein: the sampling resistor R2 is also included; and a port VM of the main control device U1 is connected with the cathode of the lithium battery cell through a sampling resistor R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022054416.5U CN212934692U (en) | 2020-09-18 | 2020-09-18 | Lithium battery with protection board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022054416.5U CN212934692U (en) | 2020-09-18 | 2020-09-18 | Lithium battery with protection board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212934692U true CN212934692U (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022054416.5U Active CN212934692U (en) | 2020-09-18 | 2020-09-18 | Lithium battery with protection board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212934692U (en) |
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2020
- 2020-09-18 CN CN202022054416.5U patent/CN212934692U/en active Active
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