A double protection circuit for lithium battery
A double protection, lithium battery technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of circuit single protection function, loss of protection function, lithium battery damage, etc., to achieve simple circuit, increased stability, and low cost Effect
Active Publication Date: 2018-04-17
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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Problems solved by technology
[0003] The above circuit has only a single protection function. After the integrated IC fails, the protection function will be lost, and there is a risk of lithium battery damage or explosion.
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[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0016] Please refer to figure 1 , a dual protection circuit for a lithium battery, including integrated circuit chips U1, U2, U3, U4, resistors R1, R2, R3, R4, R5, R6; the first pin of U1 is connected to the fifth pin of U2; the second pin of U1 Connect with one end of R1; connect the 3rd pin of U1 with the 4th pin of U2; connect the 5th pin of U1 with R5; connect the 6th pin of U1 with the 6th pin of U2, the 7th pin of U2, the 6th pin of U3, and the 6th pin of U4 ...
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The embodiment of the present invention discloses a double protection circuit for a lithium battery, including integrated circuit chips U1, U2, U3, U4, resistors R1, R2, R3, R4, R5, R6; the first pin of U1 is connected to the fifth pin of U2 ;The second pin of U1 is connected to one end of R1; the third pin of U1 is connected to the fourth pin of U2; the fifth pin of U1 is connected to one end of R5; the sixth pin of U1 is connected to the sixth pin of U2, the seventh pin of U2, and the sixth pin of U3 , the 6th pin of U4, the 7th pin of U4 and the negative electrode of the lithium battery; the 1st pin of U2 is connected with the 8th pin of U2; Pin connection; U3 pin 2 is connected to one end of R2. The embodiment of the present invention has the advantages of adding a second protection on the basis of the original single protection, realizing double protection of the lithium battery, increasing stability, and has the advantages of fewer components, simple circuit, and low cost.
Description
technical field [0001] The invention relates to the field of lithium battery protection circuits, in particular to a double protection circuit for lithium batteries. Background technique [0002] Compared with the lithium battery protection circuit and the explosion-proof lithium battery using the lithium battery protection circuit (Chinese patent application number 201220106321.6), the utility model provides a lithium battery protection circuit, including: two ports B+ terminal and B-terminal, two output ports P+ and P-terminals for connecting loads, and a first protection circuit, the B+ terminal is connected to the P+ terminal, and the B-terminal is connected to the P-terminal through two capacitors C5 and C6 , the P+ terminal is connected to the P- terminal through a voltage stabilizing capacitor, the first protection circuit is respectively connected to the B+ terminal, the B- terminal and the P- terminal, and the first protection circuit includes a battery protection c...
Claims
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IPC IPC(8): H02H7/18
Inventor 周明杰吕亚鹏
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD