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CN-224233377-U - Protection circuit, battery and electronic equipment

CN224233377UCN 224233377 UCN224233377 UCN 224233377UCN-224233377-U

Abstract

The present application relates to the field of battery protection technologies, and in particular, to a protection circuit, a battery, and an electronic device, the protection circuit comprises a first protection module, a second protection module, a first connecting piece and a second connecting piece, wherein the first protection module and the second protection module are both used for being connected with the battery cell. The first protection module is connected with the first connecting piece, and the first connecting piece and the first protection module are located at a first side. The second connecting piece is connected with the second protection module, and the second connecting piece and the second protection module are located at the second side. The first side and the second side are opposite sides. The application can reduce occupied space.

Inventors

  • YANG RUIFU

Assignees

  • 北京小米移动软件有限公司

Dates

Publication Date
20260512
Application Date
20250114

Claims (12)

  1. 1. A protection circuit is characterized by comprising a first protection module (1), a second protection module (2), a first connecting piece (3) and a second connecting piece (4), wherein, The first protection module (1) and the second protection module (2) are both used for being connected with the battery core (72); The first protection module (1) is connected with the first connecting piece (3), the first connecting piece (3) and the first protection module (1) are respectively arranged on two opposite sides of a circuit board (71) of the battery, and the first connecting piece (3) and the first protection module (1) are positioned on a first side; The second connecting piece (4) is connected with the second protection module (2), the second connecting piece (4) and the second protection module (2) are used for being respectively placed on two opposite sides of the circuit board (71), and the second connecting piece (4) and the second protection module (2) are located on a second side; The first side and the second side are opposite sides.
  2. 2. The protection circuit according to claim 1, wherein the first protection module (1) comprises a first protection chip (11) and a first MOS switch (12), a first pin of the first protection chip (11) is connected to a first end of a first resistor (R1), a second end of the first resistor (R1) is connected to a first end of a first capacitor (C1), a second pin of the first protection chip (11) is connected to a second end of the first capacitor (C1), a third pin of the first protection chip (11) is connected to a first end of the first MOS switch (12), a fourth pin of the first protection chip (11) is connected to a second end of the first MOS switch (12), a fifth pin of the first protection chip (11) is connected to a first end of a second resistor (R2), a second end of the second resistor (R2) is connected to a first end of the first protection chip (12) is connected to a first end of the first resistor (Rs) and a first end of the first protection chip (Rs) is connected to a first end of the first resistor (Rs (12), And/or the number of the groups of groups, The second protection module (2) comprises a second protection chip (21) and a second MOS switch (22), a first pin of the second protection chip (21) is connected with a first end of a third resistor (R3), a second end of the third resistor (R3) is connected with a first end of a second capacitor (C2), a second pin of the second protection chip (21) is connected with a second end of the second capacitor (C2), a third pin of the second protection chip (21) is connected with a first end of the second MOS switch (22), a fourth pin of the second protection chip (21) is connected with a second end of the second MOS switch (22), a fifth pin of the second protection chip (21) is connected with a first end of a fourth resistor (R4), a second end of the fourth resistor (R4) is connected with a third end of the second MOS switch (22) is connected with a second connecting piece (4), and a fourth pin of the second protection chip (21) is connected with a second end of the second MOS switch (Rs (2).
  3. 3. The protection circuit according to claim 2, wherein the first protection module (1) comprises a third protection chip (13) and a third MOS switch (14), the first pin of the third protection chip (13) is connected to the first end of a fifth resistor (R5), the second end of the fifth resistor (R5) is connected to the first end of a third capacitor (C3), the second pin of the third protection chip (13) is connected to the second end of the third capacitor (C3), the third pin of the third protection chip (13) is connected to the first end of the third MOS switch (14), the fourth pin of the third protection chip (13) is connected to the second end of the third MOS switch (14), the fifth pin of the third protection chip (13) is connected to the first end of a sixth resistor (R6), the second end of the sixth resistor (R6) is connected to the third end of the third capacitor (C3), the third pin of the third protection chip (13) is connected to the third end of the third MOS switch (12), the third pin of the third protection chip (Rs) is connected to the third end of the third resistor (Rs) is connected to the third end of the third MOS switch (1), And/or the number of the groups of groups, The second protection module (2) comprises a fourth protection chip (23) and a fourth MOS switch (24), wherein a first pin of the fourth protection chip (23) is connected with a first end of a seventh resistor (R7), a second end of the seventh resistor (R7) is connected with a first end of a fourth capacitor (C4), a second pin of the fourth protection chip (23) is connected with a second end of the fourth capacitor (C4), a third pin of the fourth protection chip (23) is connected with a first end of the fourth MOS switch (24), a fourth pin of the fourth protection chip (23) is connected with a second end of the fourth MOS switch (24), a fifth pin of the fourth protection chip (23) is connected with a first end of an eighth resistor (R8), a fourth end of the eighth resistor (R8) is connected with a fourth end of the fourth MOS switch (22), and a fourth pin of the fourth protection chip (23) is connected with a fourth end of the fourth MOS switch (Rs (2).
  4. 4. The protection circuit according to claim 2, characterized in that the protection circuit comprises a fifth protection chip (51), a fifth MOS switch (52) and a sixth MOS switch (53), wherein a first pin of the fifth protection chip (51) is connected to a first end of a ninth resistor (R9), a second end of the ninth resistor (R9) is connected to a first end of a fifth capacitor (C5), a second end of the fifth capacitor (C5) and a first end of a third precision resistor (Rs 3) are connected to a second pin of the fifth protection chip (51), a third pin of the fifth protection chip (51) is connected to a first end of the fifth MOS switch (52), a fourth pin of the fifth protection chip (51) is connected to a second end of the fifth MOS switch (52) is connected to a second end of the fifth resistor (R5), a third pin of the fifth protection chip (51) is connected to a third end of the fifth MOS switch (R2) is connected to a third end of the fifth MOS switch (R53), the fourth terminal of the fifth MOS switch (52) and the fourth terminal of the sixth MOS switch (53) are connected to the second terminal of the third precision resistor (Rs 3).
  5. 5. The protection circuit according to claim 1, characterized in that the protection circuit comprises a first fuse (81) and a second fuse (82), the first fuse (81) being connected to the first protection module (1), the second fuse (82) being connected to the second protection module (2).
  6. 6. The protection circuit according to claim 1, characterized in that the protection circuit comprises a power monitoring module (6), the power monitoring module (6) is used for being connected with the battery cell (72), and the power monitoring module (6) is connected with at least one of the first connecting piece (3), the second connecting piece (4), the first protection module (1) and the second protection module (2).
  7. 7. The protection circuit according to claim 6, wherein the power monitoring module (6) comprises a first power meter chip (61), a first pin of the first power meter chip (61) being connected to a first end of an eleventh resistor (R11), a second pin of the first power meter chip (61) being connected to a first end of a twelfth resistor (R12), a third pin of the first power meter chip (61) being connected to a first temperature sensor (611), a fourth pin of the first power meter chip (61) being connected to a first end of a thirteenth resistor (R13), a fifth pin of the first power meter chip (61) being connected to a first end of a fourteenth resistor (R14), a first end of the thirteenth resistor (R13) and a first end of the fourteenth resistor (R14) being connected to a first ground through a sixth capacitor (C6), a seventh pin of the first power meter chip (61) being connected to a first end of the thirteenth resistor (R13), a seventh pin of the first power meter chip (61) being connected to a first end of the thirteenth resistor (C7), and a sixteenth pin of the first power meter chip (R61) being connected to a first end of the eighth resistor (R16), respectively.
  8. 8. The protection circuit according to claim 6, wherein the power monitoring module (6) comprises a second power meter chip (63), a seventh MOS switch (64) and an eighth MOS switch (65), a first pin of the second power meter chip (63) being connected to a first end of a seventeenth resistor (R17), a second pin of the second power meter chip (63) being connected to a first end of an eighteenth resistor (R18), a third pin of the second power meter chip (63) being connected to a second temperature sensor (631), a fourth pin of the second power meter chip (63) being connected to a first end of a nineteenth resistor (R19), a fifth pin of the second power meter chip (63) being connected to a first end of a twentieth resistor (R20), a first end of the nineteenth resistor (R19) and a first end of the twentieth resistor (R20) being connected by a ninth capacitor (C9), a sixth pin of the second power meter chip (63) being connected to a third pin of the second power meter chip (63) being connected to a first end of the nineteenth resistor (R20), a fifth pin of the second power meter chip (63) being connected to a first end of the twenty-eighth resistor (R21) being connected to the first end of the twenty-eighth resistor (R20), the ninth pin of the second fuel gauge chip (63) is connected with the first end of the seventh MOS switch (64) and the first end of the eighth MOS switch (65), the tenth pin of the second fuel gauge chip (63) is connected with the second end of the seventh MOS switch (64), the second end of the eighth MOS switch (65) and the first end of the twenty-second resistor (R22) respectively, the tenth pin of the second fuel gauge chip (63) is connected with the first end of the twenty-third resistor (R23), and the second end of the twenty-second resistor (R22) is connected with the second end of the twenty-third resistor (R23).
  9. 9. A battery comprising the protection circuit according to any one of claims 1 to 8.
  10. 10. The battery according to claim 9, characterized in that the battery comprises a circuit board (71) and an electric core (72), the first connecting piece (3) and the second connecting piece (4) are respectively positioned at two ends of the circuit board (71), and one surface of the circuit board (71) is connected with the electric core (72).
  11. 11. The battery according to claim 10, wherein the cell (72) has a tab (721), the battery comprising a nickel tab (73), the nickel tab (73) being located between the tab (721) and the circuit board (71) and being connected to the tab (721) and the circuit board (71), respectively.
  12. 12. An electronic device comprising a battery as claimed in any one of claims 9 to 11.

Description

Protection circuit, battery and electronic equipment Technical Field The present application relates to the field of battery protection technologies, and in particular, to a protection circuit, a battery, and an electronic device. Background A battery is an energy source component for supplying electricity, which enables the transmission of electrical energy by making an electrical connection with other electrical devices. The battery generally comprises a protection circuit and a battery core, wherein the protection circuit is used for timely disconnecting the battery core when the battery core has a tendency of overcharge or overdischarge so as to avoid failure of the battery core caused by the overcharge or overdischarge. In the related art, a battery generally has a plurality of connectors, the connectors can realize current transmission between a protection circuit and other electrical devices, and the protection circuit is electrically connected with each connector, so that wiring is often complicated, and more space is required for a battery cell head. Disclosure of utility model In view of the above, the present application provides a protection circuit, a battery and an electronic device, so as to reduce the occupied space. Specifically, the method comprises the following technical scheme: A first aspect of the present application provides a protection circuit comprising a first protection module, a second protection module, a first connection member, and a second connection member, wherein, The first protection module and the second protection module are both used for being connected with the battery cell. The first protection module is connected with the first connecting piece, and the first connecting piece and the first protection module are located at a first side. The second connecting piece is connected with the second protection module, and the second connecting piece and the second protection module are located at the second side. The first side and the second side are opposite sides. Optionally, the first protection module includes a first protection chip and a first MOS switch, where a first pin of the first protection chip is connected to a first end of a first resistor, a second end of the first resistor is connected to a first end of a first capacitor, a second pin of the first protection chip is connected to a second end of the first capacitor, a third pin of the first protection chip is connected to a first end of the first MOS (Metal Oxide Semiconductor ) switch, a fourth pin of the first protection chip is connected to a second end of the first MOS switch, a fifth pin of the first protection chip is connected to a first end of a second resistor, a second end of the second resistor is connected to a third end of the first MOS switch, a sixth pin of the first protection chip is connected to a first end of a first precision resistor, a second end of the first precision resistor is connected to a first pin of the first MOS switch, a second pin of the first precision resistor is connected to a first end of the first MOS switch, a second pin of the first protection chip is connected to a second end of the first MOS switch, a second pin of the second protection chip is connected to a second end of the first MOS switch, a third pin of the first protection chip is connected to a second end of the first MOS switch, a third pin of the first MOS switch is connected to a third end of the first MOS switch, and the first end of the first resistor is connected to the first resistor, the sixth pin of the second protection chip and the fourth end of the second MOS switch are connected with the first end of the second precision resistor, and the second end of the second precision resistor is connected with the second pin of the second protection chip. Optionally, the first protection module includes a third protection chip and a third MOS switch, where a first pin of the third protection chip is connected to a first end of a fifth resistor, a second end of the fifth resistor is connected to a first end of a third capacitor, a second pin of the third protection chip is connected to a second end of the third capacitor, a third pin of the third protection chip is connected to a first end of the third MOS switch, a fourth pin of the third protection chip is connected to a second end of the third MOS switch, a fourth pin of the third protection chip is connected to a fourth end of the third MOS switch, a fifth pin of the sixth resistor is connected to a fourth end of the fourth resistor, a third pin of the third protection chip and a fourth end of the third MOS switch are all connected to a fourth end of the fourth resistor, a fourth pin of the third protection chip and a fourth pin of the fourth resistor are all connected to a fourth end of the fourth resistor, a fourth pin of the fourth protection chip is connected to a fourth end of the fourth resistor is connected to a fourth end of the fourth MOS sw