Double protection circuit for lithium battery
A double protection, lithium battery technology, applied in emergency protection circuit devices, electrical components and other directions, can solve the problems of single circuit protection function, loss of protection function, lithium battery damage, etc., to achieve simple circuit, increase stability, and low cost Effect
Active Publication Date: 2014-10-29
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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An embodiment of the invention discloses a double protection circuit for a lithium battery. The double protection circuit comprises integrated circuit chips U1, U2, U3, and U4, and resistors R1, R2, R3,R4, R5 and R6. The 1 pin of the U1 is connected with the 5 pin of the U2; the 2 pin of the U1 is connected with one end of the R1; the 3 pin of the U1 is connected with the 4 pin of the U2; the 5 pin of the U1 is connected with one end of the R5; the 6 pin of the U1 is respectively connected with the 6 pin of the U2, the 7 pin of the U2, the 6 pin of the U3, the 6 pin of the U4, the 7 pin of the U4 and the negative electrode of the lithium battery cathode; the 1 pin of the U2 is connected with the 8 pin of the U2; the 2 pin of the U2 is respectively connected with the 3 pin of the U2 and one end of the R3; the 1 pin of the U3 is connected with the 5 pin of the U4; and the 2 pin of the U3 is connected with one end of the R2. According to the double protection circuit, one more protection is added on the basis of the original signal protection, thereby realizing the double protection of the lithium battery, and improving stability; and the double protection circuit has the advantages of few 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