Battery module and electronic equipment

Abstract

The invention discloses a battery module and electronic equipment. The battery module comprises a battery cell, a battery protection chip, a first connector, a second connector and a first switch unit, a first electrode of the battery cell is respectively connected to the first connector and the second connector through the first switch unit, and a second electrode of the battery cell is connected to the second connector through the battery protection chip; or, the first electrode of the battery cell is respectively connected to the first connector and the second connector, and the second electrode of the battery cell is connected to the second connector sequentially through the battery protection chip and the first switch unit; wherein the battery protection chip is connected with the first switch unit; and under the condition that the first connector and / or the second connector are / is not connected with the mainboard, the first switch unit is in a turn-off state.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a battery module and an electronic device. Background Art

[0002] In order to solve the problem of burning wires caused by the battery cell connector being often charged, a battery module shutdown solution is considered. Specifically, when the battery module is not fastened to the mainboard, the power supply terminal VDD of the battery protection chip in the battery module is not powered, and the protection switch of the negative electrode of the battery cell is in the disconnected state, so the connector in the battery module is not powered; when only one connector in the battery module is fastened to the mainboard, the power supply terminal VDD of the battery protection chip is still not powered, the protection switch tube of the negative electrode of the battery cell is still in the disconnected state, and the connector in the battery module is still not powered; when both connectors in the battery module are fastened to the mainboard, the power supply terminal VDD of the battery protection chip is powered, and the protection switch of the negative electrode of the battery cell is in the on state, the connector in the battery module is powered, and thus the battery module and the mainboard are powered.

[0003] However, during the actual operation of fastening the battery module to the motherboard, one of the connectors may be fastened to the motherboard first. At this time, a leakage path may be generated between the battery module and the motherboard, causing the power supply terminal VDD of the battery protection chip and the battery cell to be energized when the two connectors are not fully fastened to the motherboard. This will cause the battery protection chip to malfunction, the protection switch of the negative pole of the battery cell to be mistakenly opened, or affect the control logic of the battery management chip in the motherboard. Summary of the invention

[0004] The embodiments of the present application provide a battery module and an electronic device to solve the problem that a leakage path may be generated when the current battery module is fastened to a mainboard, which may easily affect the control logic of the chip in the battery module and the mainboard and cause malfunction.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery module, including: a battery cell, a battery protection chip, a first connector, a second connector, and a first switch unit;

[0007] The first electrode of the battery cell is connected to the first connector and the second connector respectively through the first switch unit, and the second electrode of the battery cell is connected to the second connector through the battery protection chip;

[0008] or,

[0009] The first electrodes of the battery cells are connected to the first connector and the second connector respectively, and the second electrodes of the battery cells are connected to the second connector via the battery protection chip and the first switch unit in sequence;

[0010] The battery protection chip is connected to the first switch unit; when the first connector and / or the second connector are not connected to the mainboard, the first switch unit is in an off state.

[0011] In a second aspect, an embodiment of the present application further provides an electronic device, comprising the battery module as described above, and also comprising the mainboard.

[0012] In this way, the battery module in the above-mentioned scheme of the present application, by setting a first switch unit between the first electrode of the battery cell and the first connector and the second connector, or setting a first switch unit between the battery protection chip and the second connector, and when the first connector and / or the second connector are not connected to the mainboard, the first switch unit is in an off state, that is, when the battery module is not fully connected to the mainboard, there will be no conduction between the first electrode of the battery cell and the first connector and the second connector, or there will be no conduction between the battery protection chip and the second connector, thereby avoiding the generation of a leakage path that causes the battery cell to supply power to the power supply terminal VDD of the battery protection chip, thereby avoiding affecting the control logic of the chip in the battery module and the mainboard to avoid malfunction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 One of the schematic diagrams showing the buckling of the battery module and the mainboard of the embodiment of the present application;

[0014] Figure 2 A second schematic diagram showing the buckling of the battery module and the mainboard of the embodiment of the present application;

[0015] Figure 3 One of the schematic diagrams showing the power-on path of the power supply terminal of the battery protection chip when the battery module of the embodiment of the present application is buckled with the mainboard;

[0016] Figure 4 A second schematic diagram showing a power-on path of a power supply terminal of a battery protection chip when a battery module of an embodiment of the present application is buckled with a mainboard;

[0017] Figure 5 A schematic diagram showing a boost circuit according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0019] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a battery module that can solve the problem that a leakage path may be generated when the current battery module is fastened to the mainboard, which may easily affect the control logic of the chip in the battery module and the mainboard and cause malfunction.

[0020] Specifically, the battery module 1 includes: a battery cell 10, a battery protection chip 20, a first connector 30, a second connector 40 and a first switch unit 50;

[0021] The first electrode of the battery cell 10 is connected to the first connector 30 and the second connector 40 respectively through the first switch unit 50, and the second electrode of the battery cell 10 is connected to the second connector 40 through the battery protection chip 20;

[0022] or,

[0023] The first electrodes of the battery cell 10 are connected to the first connector 30 and the second connector 40 respectively, and the second electrodes of the battery cell 10 are connected to the second connector 40 through the battery protection chip 20 and the first switch unit 50 in sequence;

[0024] The battery protection chip 20 is connected to the first switch unit 50; when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2, the first switch unit 50 is in an off state.

[0025] Optionally, the first electrode of the battery cell 10 may be one of the positive electrode and the negative electrode, and the second electrode of the battery cell 10 may be the other of the positive electrode and the negative electrode.

[0026] Optionally, as an implementation method: the first electrode of the battery cell 10 is respectively connected to the first connector 30 and the second connector 40 through the first switch unit 50, and the second electrode of the battery cell 10 is connected to the second connector 40 through the battery protection chip 20, and when the battery protection chip 20 is connected to the first switch unit 50, when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2, the first switch unit 50 is in an off state.

[0027] Among them, the first electrode of the battery cell 10 is connected to the first connector 30 and the second connector 40 respectively through the first switch unit 50, that is, the first electrode of the battery cell 10 is connected to the first connector 30 through the first switch unit 50, and the first electrode of the battery cell 10 is also connected to the second connector 40 through the first switch unit 50. In this way, when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2 (that is, the battery module 1 is not completely connected to the mainboard 2), since the first switch unit 50 is in the off state, the first electrode of the battery cell 10 will not be connected to the first connector 30 and the second connector 40, so as to avoid the generation of a leakage path causing the battery cell 10 to supply power to the power supply terminal VDD of the battery protection chip 20, thereby avoiding affecting the control logic of the chip in the battery module and the mainboard, so as to avoid malfunction.

[0028] Optionally, as another implementation method: the first electrode of the battery cell 10 is respectively connected to the first connector 30 and the second connector 40, and the second electrode of the battery cell 10 is connected to the second connector 40 through the battery protection chip 20 and the first switch unit 50 in sequence. When the battery protection chip 20 is connected to the first switch unit 50, when the first connector 30 and / or the second connector 40 is not connected to the mainboard 2, the first switch unit 50 is in an off state.

[0029] The first electrode of the battery cell 10 is connected to the first connector 30 and the second connector 40, respectively, including: the first electrode of the battery cell 10 is directly connected to the first connector 30 and the second connector 40, respectively (that is, the first electrode of the battery cell 10 is directly connected to the first connector 30, and the first electrode of the battery cell 10 is directly connected to the second connector 40), and / or, the first electrode of the battery cell 10 is indirectly connected to the first connector 30 and the second connector 40, respectively (for example, through other electrical devices or units connected in series with the first connector 30 and the second connector 40). In this way, when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2 (that is, the battery module 1 is not completely connected to the mainboard 2), since the first switch unit 50 is in the off state, the battery protection chip 20 and the second connector 40 will not be connected, so as to avoid the leakage path causing the battery cell 10 to supply power to the power supply terminal VDD of the battery protection chip 20, thereby avoiding affecting the control logic of the chip in the battery module and the mainboard, so as to avoid malfunction.

[0030] The battery module 1 in the embodiment of the present application, by setting a first switch unit 50 between the first electrode of the battery cell 10 and the first connector 30 and the second connector 40, or setting a first switch unit 50 between the battery protection chip 20 and the second connector 40, and when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2, the first switch unit 50 is in an off state, that is, when the battery module 1 is not fully connected to the mainboard 2, there will be no conduction between the first electrode of the battery cell 10 and the first connector 30 and the second connector 40, or there will be no conduction between the battery protection chip 20 and the second connector 40, thereby avoiding the generation of a leakage path that causes the battery cell 10 to supply power to the power supply terminal VDD of the battery protection chip 20, thereby avoiding affecting the control logic of the chip in the battery module and the mainboard to avoid malfunction.

[0031] For example, as an implementation method: the first electrode of the battery cell 10 is respectively connected to the first connector 30 and the second connector 40 through the first switch unit 50, and the second electrode of the battery cell 10 is connected to the second connector 40 through the battery protection chip 20. When the battery protection chip 20 is connected to the first switch unit 50, the specific connection method can be: the first electrode of the battery cell 10 is respectively connected to the first end P1+ of the first connector 30 and the first end P2+ of the second connector 40 through the first switch unit 50 (for example: the positive electrode of the battery cell 10 is indirectly connected to the first end P1+ of the first connector 30 and the first end P2+ of the second connector 40, respectively, that is, the first switch unit 50 is connected in series in the path where the positive electrode of the battery cell 10 is connected to the first end P1+ of the first connector 30 and the first end P2+ of the second connector 40), and the first electrode of the battery cell 10 is also The battery cell 10 is connected to the second end A of the first connector 30 (for example, the positive electrode of the battery cell 10 is also directly connected to the second end A of the first connector 30, or it can also be indirectly connected to the second end A of the first connector 30 through other electrical components or units); the second electrode of the battery cell 10 is connected to the battery protection chip 20, and the power supply terminal VDD of the battery protection chip 20 is connected to the third end D of the second connector 40 (for example, the negative electrode of the battery cell 10 is connected to the ground terminal VSS of the battery protection chip 20, and the power supply terminal VDD of the battery protection chip 20 is connected to the third end D of the second connector 40), and the second electrode of the battery cell 10 is also connected to the second end P2- of the second connector 40 (for example, the negative electrode of the battery cell 10 is also directly connected to the second end P2- of the second connector 40, or it can also be indirectly connected to the second end P2- of the second connector 40 through other electrical components or units).

[0032] For details, see Figure 3 As shown, when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2 (for example, the first connector 30 is not connected to the third connector 21 on the mainboard 2, and / or the second connector 40 is not connected to the fourth connector 22 on the mainboard 2), the arrow direction indicates the leakage path. Since the first switch unit 50 is in the off state at this time, that is, the dotted arrow part is not conductive, the power supply terminal VDD of the battery protection chip 20 is not powered (that is, there is no conduction between the power supply terminal VDD of the battery protection chip 20 and the positive electrode of the battery cell 10), the battery protection The chip 20 does not work, so the battery protection chip 20 will not output an electrical signal to the first switch unit 50, and the first switch unit 50 remains in the off state, that is, the positive pole of the battery cell 10 is disconnected from the first end P1+ of the first connector 30 and the first end P2+ of the second connector 40, so as to avoid the leakage path from being turned on. Since there is no voltage on the first end P1+ of the first connector 30 and the first end P2+ of the second connector 40, the power supply terminal VDD of the battery protection chip 20 will not be powered on, that is, the battery cell 10 is in a completely turned off state.

[0033] Optionally, when both the first connector 30 and the second connector 40 are connected to the mainboard 2, the battery protection chip 20 outputs the first electrical signal to the first switch unit 50, the first switch unit 50 is in a conducting state under the action of the first electrical signal, and the battery cell 10 forms a power path with the battery management chip 23 in the mainboard 2 through the first connector 30 and the second connector 40. That is, when both the first connector 30 and the second connector 40 are connected to the mainboard 2, the battery cell 10 supplies power to the battery protection chip 20 through the second end A of the first connector 30, the mainboard 2, and the third end D of the second connector 40 in sequence; when the battery cell 10 supplies power to the battery protection chip 20, the battery protection chip 20 outputs the first electrical signal to the first switch unit 50; the first switch unit 50 is in a conducting state under the action of the first electrical signal, and a power path is formed from the first electrode of the battery cell 10 through the first switch unit 50, the first end P1+ of the first connector 30, the battery management chip 23, and the second end P2- of the second connector 40 to the second electrode of the battery cell 10.

[0034] Specifically, when the first connector 30 and the second connector 40 are both connected to the mainboard 2 (for example, the first connector 30 is connected to the third connector 21 on the mainboard 2, and the second connector 40 is connected to the fourth connector 22 on the mainboard 2), since the second end A of the first connector 30 is connected to the connection end B of the third connector 21, the third end D of the second connector 40 is connected to the connection end C of the fourth connector 22, and the connection end B of the third connector 21 on the mainboard 2 and the connection end C of the fourth connector 22 are connected by wiring, the following conduction path is formed: the positive electrode of the battery cell 10 → the second end A of the first connector 30 → the connection end B of the third connector 21 → the connection end C of the fourth connector 22 → the third end D of the second connector 40 → the power supply end VDD of the battery protection chip 20, that is, the second end A of the first connector 30 and the third end D of the second connector 40 are connected, so that the power supply end VDD of the battery protection chip 20 is powered on (that is, the power supply end VDD of the battery protection chip 20 is connected to the positive electrode of the battery cell 10), and the battery protection chip 20 is in a working state. When the battery protection chip 20 is in a working state, a voltage (i.e., a first electrical signal) is output to the first switch unit 50 through the battery protection chip 20, so that the first switch unit 50 is in a conducting state, thereby forming the following power-on path: the positive electrode of the battery cell 10 → the first end P1+ of the first connector 30 → the battery voltage end VBAT of the third connector 21 → the battery management chip 23 on the mainboard 2 → the ground end GND of the fourth connector 22 → the first end P2+ of the second connector 40 → the voltage monitoring end VM of the battery protection chip 20 and the negative electrode of the battery cell 10, so that the battery cell 10 forms a power-on path with the battery management chip 23 in the mainboard 2 through the first connector 30 and the second connector 40, that is, the battery module 1 is energized with the battery management chip 23 on the mainboard 2, that is, the battery cell 10 can output electric energy to the mainboard through the battery management chip 23, or be charged through the battery management chip 23, etc.

[0035] For another example, as another implementation method: the first electrodes of the battery cell 10 are respectively connected to the first connector 30 and the second connector 40, and the second electrodes of the battery cell 10 are connected to the second connector 40 through the battery protection chip 20 and the first switch unit 50 in sequence. When the battery protection chip 20 is connected to the first switch unit 50, the specific connection method can be: the first electrodes of the battery cell 10 are respectively connected to the first end P1+ of the first connector 30, the first end P2+ of the second connector 40 and the second end A of the first connector 30 (for example: the positive electrode of the battery cell 10 is directly connected to the first end P1+ of the first connector 30 and the first end P2+ of the second connector 40, the positive electrode of the battery cell 10 is directly connected to the second end A of the first connector 30, or the positive electrode of the battery cell 10 is indirectly connected to the second end A of the first connector 30 through other electrical components or units); the power supply terminal VDD of the battery protection chip 20 is connected to the third end D of the second connector 40, and the battery protection chip 20 is connected to the third end D of the second connector 40. The voltage monitoring terminal VM of the battery protection chip 20 is connected to the second terminal P2- of the second connector 40 through the first switch unit 50 (for example: the negative electrode of the battery cell 10 is connected to the ground terminal VSS of the battery protection chip 20, the power supply terminal VDD of the battery protection chip 20 is directly connected to the third terminal D of the second connector 40, and the voltage monitoring terminal VM of the battery protection chip 20 is indirectly connected to the second terminal P2- of the second connector 40, that is, the first switch unit 50 is connected in series in the path where the voltage monitoring terminal VM is connected to the second terminal P2- of the second connector 40); the second electrode of the battery cell 10 is also connected to the second terminal P2- of the second connector 40 (for example: the negative electrode of the battery cell 10 is directly connected to the second terminal P2- of the second connector 40, or the negative electrode of the battery cell 10 is indirectly connected to the second terminal of the second connector 40 through other electrical components or units, that is, other electrical components or units can be set in series in the path where the negative electrode of the battery cell 10 is connected to the second terminal P2- of the second connector 40).

[0036] For details, see Figure 4As shown, when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2 (for example, the first connector 30 is not connected to the third connector 21 on the mainboard 2, and / or the second connector 40 is not connected to the fourth connector 22 on the mainboard 2), the arrow direction indicates the leakage path. Since the first switch unit 50 is in the off state at this time, that is, the dotted arrow part is not conductive, the power supply terminal VDD of the battery protection chip 20 is not powered on (that is, there is no conduction between the power supply terminal VDD of the battery protection chip 20 and the positive electrode of the battery cell 10), the battery protection chip 20 does not work, so that the battery protection chip 20 does not output an electrical signal to the first switch unit 50, and the first switch unit 50 remains in the off state to avoid the leakage path from being turned on. Since there is no conduction on the path from the positive electrode of the battery cell 10 to the mainboard 2 and then back to the inside of the battery protection chip 20 through the voltage monitoring terminal VM, the power supply terminal VDD of the battery protection chip 20 will not be powered on, that is, the battery cell 10 is in a completely closed state.

[0037] Optionally, when both the first connector 30 and the second connector 40 are connected to the mainboard 2, the battery protection chip 20 outputs the first electrical signal to the first switch unit 50, the first switch unit 50 is in a conducting state under the action of the first electrical signal, and the battery cell 10 forms a power path with the battery management chip 23 in the mainboard 2 through the first connector 30 and the second connector 40. That is, when both the first connector 30 and the second connector 40 are connected to the mainboard 2, the battery cell 10 supplies power to the battery protection chip 20 through the second end A of the first connector 30, the mainboard 2, and the third end D of the second connector 40 in sequence; when the battery cell 10 supplies power to the battery protection chip 20, the battery protection chip 20 outputs the first electrical signal to the first switch unit 50; the first switch unit 50 is in a conducting state under the action of the first electrical signal, and a power path is formed from the first electrode of the battery cell 10 through the first switch unit 50, the first end P1+ of the first connector 30, the battery management chip 23, and the second end P2- of the second connector 40 to the second electrode of the battery cell 10.

[0038] Specifically, when the first connector 30 and the second connector 40 are both connected to the mainboard 2 (for example, the first connector 30 is connected to the third connector 21 on the mainboard 2, and the second connector 40 is connected to the fourth connector 22 on the mainboard 2), since the second end A of the first connector 30 is connected to the connection end B of the third connector 21, the third end D of the second connector 40 is connected to the connection end C of the fourth connector 22, and the connection end B of the third connector 21 on the mainboard 2 and the connection end C of the fourth connector 22 are connected by wiring, the following conduction path is formed: the positive electrode of the battery cell 10 → the second end A of the first connector 30 → the connection end B of the third connector 21 → the connection end C of the fourth connector 22 → the third end D of the second connector 40 → the power supply end VDD of the battery protection chip 20, that is, the second end A of the first connector 30 and the third end D of the second connector 40 are connected, so that the battery protection chip 20 is powered on (that is, the power supply end VDD of the battery protection chip 20 is connected to the positive electrode of the battery cell 10), and the battery protection chip 20 is in a working state. When the battery protection chip 20 is in a working state, a voltage (i.e., a first electrical signal) is output to the first switch unit 50 through the battery protection chip 20, so that the first switch unit 50 is in a conducting state, thereby forming the following power-on path: the positive electrode of the battery cell 10 → the first end P1+ of the first connector 30 → the battery voltage end VBAT of the third connector 21 → the battery management chip 23 on the mainboard 2 → the ground end GND of the fourth connector 22 → the first end P2+ of the second connector 40 → the negative electrode of the battery cell 10 and the voltage monitoring end VM conducted to the battery protection chip 20 through the first switch unit 50, so that the battery cell 10 forms a power-on path with the battery management chip 23 in the mainboard 2 through the first connector 30 and the second connector 40, that is, the battery module 1 is energized with the battery management chip 23 on the mainboard 2, that is, the battery cell 10 can output electric energy to the mainboard through the battery management chip 23, or be charged through the battery management chip 23, etc.

[0039] The battery module in the embodiment of the present application is provided with a first switch unit 50 in a path where the positive electrode of the battery cell 10 is respectively connected to the first end P1+ of the first connector 30 and the first end P2+ of the second connector 40; or a first switch unit 50 is provided in a path where the voltage monitoring end VM is connected to the second end P2- of the second connector 40, so that when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2, the power supply end VDD of the battery protection chip is not powered on (that is, there is no conduction between the power supply end VDD of the battery protection chip 20 and the positive electrode of the battery cell 10), and the first switch unit 50 is in an off state, so as to avoid the generation of a leakage path causing the power supply end VDD to be powered on, thereby ensuring that the battery cell 10 is in a completely closed state; and when both the first connector 30 and the second connector 40 are connected to the mainboard 2, The second end A of the first connector 30 is connected to the third end D of the second connector 40, the power supply terminal VDD of the battery protection chip 20 is powered on (i.e., the power supply terminal VDD of the battery protection chip 20 is connected to the positive electrode of the battery cell 10), the battery protection chip 20 is in working state, and outputs voltage (i.e., the first electrical signal) to the first switch unit 50, then the first switch unit 50 is in the on state, and the battery cell 10 forms a power-on path with the battery management chip 23 in the main board 2 through the first connector 30 and the second connector 40, that is, the battery module 1 is powered on with the battery management chip 23 on the main board 2, to achieve normal operation of the battery module 1, and solves the problem that the current battery module 1 may generate a leakage path when it is buckled with the main board 2, which is easy to affect the control logic of the chips in the battery module 1 and the main board 2, resulting in malfunction.

[0040] Specifically, in actual application, when assembling the battery module 1 and the mainboard 2, it may be necessary to first ensure that one pair of connectors are fastened before fastening another pair of connectors. The use of the embodiment of the present application can avoid the leakage path that causes the battery protection chip 20 to malfunction, as well as the power-on timing and logic anomalies of the battery protection chip 20 and the battery management chip 23 on the mainboard, and effectively avoid the device reliability risks caused by this. It can also ensure that before the battery module 1 is fully assembled on the mainboard 2, the battery cell 10 can be in a completely power-off state, and even if the voltage of the battery cell 10 is tested with an instrument, it will not measure a half-high voltage due to the voltage division formed by the internal resistance of the instrument and the internal resistance of the battery protection chip 20, which will affect the quality judgment of the battery.

[0041] Optionally, see Figure 1 , the first switch unit 50 includes: a first power switch tube Q1 and a second power switch tube Q2;

[0042] The source of the first power switch tube Q1 is connected to the first electrode of the battery cell 10, the source of the second power switch tube Q2 is connected to the second connector 40, the gates of the first power switch tube Q1 and the second power switch tube Q2 are both connected to the battery protection chip 20, and the drain of the first power switch tube Q1 is connected to the drain of the second power switch tube Q2.

[0043] For example: the source of the first power switch tube Q1 is connected to the positive electrode of the battery cell 10, the gate of the first power switch tube Q1 is connected to the first voltage control terminal CO of the battery protection chip 20, the source of the second power switch tube Q2 is connected to the third terminal D of the second connector 40, the gate of the second power switch tube Q2 is connected to the second voltage control terminal DO of the battery protection chip 20, and the drain of the first power switch tube Q1 is connected to the drain of the second power switch tube Q2.

[0044] Among them, when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2, the first power switch tube Q1 and the second power switch tube Q2 are both in the off state; when the first connector 30 and the second connector 40 are both connected to the mainboard 2, the battery cell 10 supplies power to the battery protection chip 20, and the battery protection chip 20 outputs a first electrical signal to the first power switch tube Q1 and the second power switch tube Q2, and the first power switch tube Q1 and the second power switch tube Q2 are both in the on state under the action of the first electrical signal.

[0045] In this embodiment, by configuring the first switch unit 50 to include a first power switch tube Q1 and a second power switch tube Q2, the generation of a leakage path when the first connector 30 and / or the second connector 40 is not connected to the mainboard 2 can be effectively avoided.

[0046] Optionally, the first switch unit 50 further includes: a first resistor R1 and a second resistor R2; the first resistor R1 is connected between the source and the drain of the first power switch tube Q1, and the second resistor R2 is connected between the source and the drain of the second power switch tube Q2.

[0047] In this embodiment, by setting a first resistor R1 between the source and the drain of the first power switch tube Q1, and setting a second resistor R2 between the source and the drain of the second power switch tube Q2, the first power switch tube Q1 and the second power switch tube Q2 can be kept in the off state at all times before the power supply terminal VDD of the battery protection chip 20 is powered on.

[0048] Optionally, the battery module further includes: at least one boost unit 60 ; and the first switch unit 50 is connected to the battery protection chip 20 via the at least one boost unit 60 .

[0049] Specifically, taking the first switch unit 50 including the first power switch tube Q1 and the second power switch tube Q2 as an example, since the conduction of the first power switch tube Q1 and the second power switch tube Q2 needs to satisfy V CO -Vcell>VGS(th) and V DO -Vcell>VGS(th), where V CO is the voltage output from the first voltage control terminal CO, V DO is the voltage output from the second voltage control terminal DO, Vcell is the voltage of the cell 10, and VGS(th) is the conduction voltage of Q1 and Q2. That is, the conduction of the first power switch tube Q1 and the second power switch tube Q2 needs to meet V CO >Vcell+VGS(th) and V CO >Vcell+VGS(th), therefore, the above requirements can be met by setting a boost unit 60 on the voltage output path from the first voltage control terminal CO to the first power switch tube Q1 and the voltage output path from the second voltage control terminal DO to the second power switch tube Q2.

[0050] For example, the number of the boost unit 60 may be one, that is, the first switch unit 50 is connected to the battery protection chip 20 through a boost unit 60. For example, the gate of the first power switch tube Q1 is connected to the first voltage control terminal CO of the battery protection chip 20 through the boost unit 60, and the gate of the second power switch tube Q2 is also connected to the second voltage control terminal DO of the battery protection chip 20 through the boost unit 60. That is, the voltage output from the first voltage control terminal CO and the second voltage control terminal DO of the battery protection chip 20 is boosted by the boost unit 60, and after the boost, it is respectively input to the first power switch tube Q1 and the second power switch tube Q2 to ensure that the first power switch tube Q1 and the second power switch tube Q2 can be turned on under voltage drive.

[0051] For another example, the number of the boosting units 60 may be multiple, that is, the first switch unit 50 is connected to the battery protection chip 20 through multiple boosting units 60. For example: the gate of the first power switch tube Q1 is connected to the first voltage control terminal CO of the battery protection chip 20 through a boosting unit 60, and the gate of the second power switch tube Q2 is connected to the second voltage control terminal DO of the battery protection chip 20 through another boosting unit 60. That is, the voltage output from the first voltage control terminal CO of the battery protection chip 20 is boosted by a boosting unit 60, and the boosted voltage is input to the first power switch tube Q1, and the voltage output from the second voltage control terminal DO of the battery protection chip 20 is boosted by another boosting unit 60, and the boosted voltage is input to the second power switch tube Q2, so as to ensure that the first power switch tube Q1 and the second power switch tube Q2 can be turned on under voltage drive.

[0052] Optionally, continue to see Figure 2 As shown, the first switch unit 50 includes: a third power switch tube Q3; the source and gate of the third power switch tube Q3 are both connected to the battery protection chip 20, and the drain of the third power switch tube Q3 is connected to the second connector 40.

[0053] For example: the source of the third power switch tube Q3 is connected to the voltage monitoring terminal VM of the battery protection chip 20, the drain of the third power switch tube Q3 is connected to the second terminal P2- of the second connector 40, and the gate of the third power switch tube Q3 is connected to the power supply terminal VDD of the battery protection chip 20.

[0054] Among them, when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2, the third power switch tube Q3 is in an off state; when the first connector 30 and the second connector 40 are both connected to the mainboard 2, the battery cell 10 supplies power to the battery protection chip 20, and the battery protection chip 20 outputs a first electrical signal to the third power switch tube Q3, and the third power switch tube Q3 is in an on state under the action of the first electrical signal.

[0055] In this embodiment, by configuring the first switch unit 50 to include the third power switch tube Q3 , the generation of a leakage path when the first connector 30 and / or the second connector 40 is not connected to the mainboard 2 can be effectively avoided.

[0056] Optionally, the first switch unit 50 further includes: a third resistor R3; the third resistor R3 is connected between the source and the drain of the third power switch tube Q3.

[0057] In this embodiment, a third resistor R3 is provided between the source and the drain of the third power switch tube Q3, so as to ensure that the third power switch tube Q3 is always in the off state before the battery protection chip 20 is powered on.

[0058] Optionally, the battery module further includes: at least one boost unit 60 ; the first switch unit 50 is connected to the battery protection chip 20 via the boost unit 60 .

[0059] Specifically, taking the first switch unit 50 including the third power switch tube Q3 as an example, since the voltage monitoring terminal VM is pulled up to the voltage of the power supply terminal VDD inside the battery protection chip 20 in the case of over-discharge protection, in order to ensure that the third power switch tube Q3 is always on, the third power switch tube Q3 needs to meet Vg-V VM >VGS(th), where Vg is the gate voltage of the third power switch Q3, V VM is the voltage of the voltage monitoring terminal VM, so the above requirement can be met by setting a boost unit 60 at the gate of the third power switch tube Q3.

[0060] Optionally, the battery module further includes: a second switch unit 51; the second electrode of the battery cell 10 is also connected to the second connector 40 through the second switch unit 51;

[0061] Among them, the battery protection chip 20 is connected to the second switch unit 51; when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2, the second switch unit 51 is in an off state; when the first connector 30 and the second connector 40 are both connected to the mainboard 2, the battery cell 10 supplies power to the battery protection chip 20, and the battery protection chip 20 outputs a second electrical signal to the second switch unit 51, and the second switch unit 51 is in an on state under the action of the second electrical signal.

[0062] As an implementation method: the first electrode of the battery cell 10 is respectively connected to the first connector 30 and the second connector 40 through the first switch unit 50, and the second electrode of the battery cell 10 is connected to the second connector 40 through the battery protection chip 20. When the battery protection chip 20 is connected to the first switch unit 50, the battery module may also include a second switch unit 51; the second electrode of the battery cell 10 is also connected to the second connector 40 through the second switch unit 51.

[0063] As another implementation method: the first electrode of the battery cell 10 is respectively connected to the first connector 30 and the second connector 40, and the second electrode of the battery cell 10 is connected to the second connector 40 through the battery protection chip 20 and the first switch unit 50 in sequence. When the battery protection chip 20 is connected to the first switch unit 50, the battery module may also include a second switch unit 51; the second electrode of the battery cell 10 is also connected to the second connector 40 through the second switch unit 51.

[0064] Specifically, the second electrode of the battery cell 10 is also connected to the second connector 40 through the second switch unit 51. The second electrode of the battery cell 10 may be connected to the second end P2- of the second connector 40 through the second switch unit 51. For example, the negative electrode of the battery cell 10 is directly connected to the second end P2- of the second connector 40 through the second switch unit 51, or the negative electrode of the battery cell 10 is directly connected to the second end P2- of the second connector 40 through other electrical components and the second switch unit 51.

[0065] In this embodiment, a second switch unit is provided between the second electrode of the battery cell 10 and the second connector 40 to avoid a circuit being formed between the positive electrode of the battery cell 10 passing through the first connector and the second connector to the negative electrode of the battery cell 10 before the battery module 1 is fully connected to the main board 2, thereby preventing the battery cell 10 from discharging and causing failure or damage. That is, it is ensured that the battery cell 10 can always remain in a closed state before the battery module 1 is fully connected to the main board 2.

[0066] Optionally, the second switch unit 51 includes: a fourth power switch tube Q4 and a fifth power switch tube Q5; the source of the fourth power switch tube Q4 is connected to the second electrode of the battery cell 10, the source of the fifth power switch tube Q5 is connected to the second connector 40, the gates of the fourth power switch tube Q4 and the fifth power switch tube Q5 are respectively connected to the battery protection chip 20, and the drain of the fourth power switch tube Q4 is connected to the drain of the fifth power switch tube Q5.

[0067] For example: the source of the fourth power switch tube Q4 is connected to the second electrode of the battery cell 10, the gate of the fourth power switch tube Q4 is connected to the first voltage control terminal CO of the battery protection chip 20, the source of the fifth power switch tube Q5 is connected to the second end P2- of the second connector 40, the gate of the fifth power switch tube Q5 is connected to the second voltage control terminal DO of the battery protection chip 20, and the drain of the fourth power switch tube Q4 is connected to the drain of the fifth power switch tube Q5.

[0068] Wherein, when the first connector 30 and / or the second connector 40 are not connected to the mainboard 2, the fourth power switch tube Q4 and the fifth power switch tube Q5 are both in the off state; when the first connector 30 and the second connector 40 are both connected to the mainboard 2, the battery cell 10 supplies power to the battery protection chip 20, and the battery protection chip 20 outputs a second electrical signal to the fourth power switch tube Q4 and the fifth power switch tube Q5, and the fourth power switch tube Q4 and the fifth power switch tube Q5 are both in the on state under the action of the second electrical signal. For example: the battery protection chip 20 outputs a voltage (i.e., a second electrical signal) to the fourth power switch tube Q4 through the first voltage control terminal CO, and outputs a voltage (i.e., a second electrical signal) to the fifth power switch tube Q5 through the second voltage control terminal DO, so that the fourth power switch tube Q4 and the fifth power switch tube Q5 are both in the on state.

[0069] Optionally, the boost unit 60 may be Figure 5 Specifically, the input terminal Vin of the boost circuit can be used as the input terminal of the boost unit 60 (for example, the input terminal of the boost unit 60 can be an end connected to the first voltage control terminal CO and / or the second voltage control terminal DO); the output terminal Vout of the boost circuit can be used as the output terminal of the boost unit 60 (for example, the output terminal of the boost unit 60 can be an end connected to the gate of the first power switch tube Q1 and / or the gate of the second power switch tube Q2, or can be an end connected to the gate of the third power switch tube Q3).

[0070] Optionally, the boost circuit may be composed of power switch tubes Q11, Q12, Q13, Q14, capacitors C1 and C2; wherein the first end of the power switch tube Q11 is connected to the first end of the power switch tube Q13, and the first end of the power switch tube Q11 forms the input end Vin; the first end of the power switch tube Q11 is respectively connected to the first end of the power switch tube Q12 and the first end of the capacitor C1; the second end of the power switch tube Q12 is connected to the first end of the power switch tube Q14 through the capacitor C2, and the second end of the power switch tube Q12 forms the input end Vin. The output terminal Vout; the second end of the power switch tube Q14 is connected to the second end of the power switch tube Q13 and the second end of the capacitor C1 respectively; the control end of the power switch tube Q11 and the control end of the power switch tube Q14 are used to input the first clock signal CLK1, and the control end of the power switch tube Q12 and the control end of the power switch tube Q13 are used to input the second clock signal CLK2. By adjusting the duty ratio of the first clock signal CLK1 and the second clock signal CLK2, the boost regulation of the boost circuit can be achieved to meet the corresponding boost requirement, which is not specifically limited in the embodiments of the present application.

[0071] Optionally, the battery module 1 may further include: at least one of a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6;

[0072] The first electrode of the battery cell 10 is connected to the first connector 30 through the fourth resistor R4. For example, the positive electrode of the battery cell 10 is connected to the second end A of the first connector 30 through the fourth resistor R4. The fourth resistor R4 can play a role in current limiting.

[0073] Among them, the second electrode of the battery cell 10 is connected to the second connector 40 through the fifth resistor R5. For example, the negative electrode of the battery cell 10 is connected to the second end P2- of the second connector 40 through the fifth resistor R5. Optionally, in the case where the battery module includes a second switch unit 51, the second electrode of the battery cell 10 is connected to the second connector 40 through the fifth resistor R5 and the second switch unit 51. For example, the negative electrode of the battery cell 10 is connected to the second end P2- of the second connector 40 through the fifth resistor R5 and the second switch unit 51. The fifth resistor R5 can be used for overcurrent detection.

[0074] Wherein, when the first switch unit 50 is arranged between the first electrode of the battery cell 10 and the first connector 30 and the second connector 40, the voltage monitoring terminal VM of the battery protection chip 20 is connected to the second connector 40 through the sixth resistor R6, for example: the voltage monitoring terminal VM of the battery protection chip 20 is connected to the second terminal P2- of the second connector 40 through the sixth resistor R6. Alternatively, when the first switch unit 50 is arranged between the battery protection chip 20 and the second connector 40, the voltage monitoring terminal VM of the battery protection chip 20 is connected to the second connector 40 through the first switch unit 50 and the sixth resistor R6, for example: the voltage monitoring terminal VM of the battery protection chip 20 is connected to the second terminal P2- of the second connector 40 through the first switch unit 50 and the sixth resistor R6. The sixth resistor R6 plays a role of voltage division.

[0075] Optionally, the power switch tube involved in the embodiment of the present application may adopt a metal-oxide-semiconductor field-effect transistor (MOSFET), or may adopt other forms of transistors with power switching functions, etc., and the embodiment of the present application is not limited thereto.

[0076] An embodiment of the present application provides an electronic device, including the battery module as described above, and also including the mainboard.

[0077] Specifically, the battery module can be implemented by any of the above embodiments, the specific structure of the mainboard can refer to the above embodiments, and the electronic device can achieve the effects that can be achieved by the above battery module, which will not be described here to avoid repetition.

[0078] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0079] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0080] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0081] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary personnel in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications are also within the scope of protection of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell, a battery protection chip, a first connector, a second connector and a first switch unit; The first electrode of the battery cell is connected to the first connector and the second connector respectively through the first switch unit, and the second electrode of the battery cell is connected to the second connector through the battery protection chip; or, The first electrodes of the battery cells are connected to the first connector and the second connector respectively, and the second electrodes of the battery cells are connected to the second connector via the battery protection chip and the first switch unit in sequence; The battery protection chip is connected to the first switch unit; when the first connector and / or the second connector are not connected to the mainboard, the first switch unit is in an off state.

2. The battery module according to claim 1, characterized in that: When the first connector and the second connector are both connected to the mainboard, the battery protection chip outputs a first electrical signal to the first switch unit, the first switch unit is in an on state under the action of the first electrical signal, and the battery cell forms a power path with the battery management chip in the mainboard through the first connector and the second connector.

3. The battery module according to claim 2, characterized in that: The first electrode of the battery cell is connected to the first end of the first connector and the first end of the second connector respectively through the first switch unit, and the first electrode of the battery cell is also connected to the second end of the first connector, the second electrode of the battery cell is also connected to the second end of the second connector, and the power supply end of the battery protection chip is connected to the third end of the second connector; or, The first electrode of the battery cell is respectively connected to the first end of the first connector, the first end of the second connector and the second end of the first connector, the second electrode of the battery cell is also connected to the second end of the second connector, the power supply end of the battery protection chip is connected to the third end of the second connector, and the voltage monitoring end of the battery protection chip is connected to the second end of the second connector through the first switch unit; Among them, when the first connector and the second connector are both connected to the mainboard, the battery cell supplies power to the battery protection chip through the second end of the first connector, the mainboard, and the third end of the second connector in sequence; when the battery cell supplies power to the battery protection chip, the battery protection chip outputs the first electrical signal to the first switch unit; the first switch unit is in a conducting state under the action of the first electrical signal, and a power path is formed from the first electrode of the battery cell through the first switch unit, the first end of the first connector, the battery management chip, the second end of the second connector to the second electrode of the battery cell.

4. The battery module according to claim 1, characterized in that: The first switch unit includes: a first power switch tube and a second power switch tube; The source of the first power switch tube is connected to the first electrode of the battery cell, the source of the second power switch tube is connected to the second connector, the gates of the first power switch tube and the second power switch tube are both connected to the battery protection chip, and the drain of the first power switch tube is connected to the drain of the second power switch tube; Among them, when the first connector and / or the second connector are not connected to the mainboard, the first power switch tube and the second power switch tube are both in the off state; when the first connector and the second connector are both connected to the mainboard, the battery cell supplies power to the battery protection chip, and the battery protection chip outputs a first electrical signal to the first power switch tube and the second power switch tube, and the first power switch tube and the second power switch tube are both in the on state under the action of the first electrical signal.

5. The battery module according to claim 4, characterized in that: The first switch unit further includes: a first resistor and a second resistor; The first resistor is connected between the source and the drain of the first power switch tube, and the second resistor is connected between the source and the drain of the second power switch tube.

6. The battery module according to claim 1, characterized in that: The first switch unit includes: a third power switch tube; The source and gate of the third power switch tube are both connected to the battery protection chip, and the drain of the third power switch tube is connected to the second connector; Among them, when the first connector and / or the second connector are not connected to the mainboard, the third power switch tube is in an off state; when the first connector and the second connector are both connected to the mainboard, the battery cell supplies power to the battery protection chip, the battery protection chip outputs a first electrical signal to the third power switch tube, and the third power switch tube is in an on state under the action of the first electrical signal.

7. The battery module according to claim 6, characterized in that: The first switch unit further includes: a third resistor; The third resistor is connected between the source and the drain of the third power switch tube.

8. The battery module according to claim 4 or 6, characterized in that: Also includes: at least one boost unit; The first switch unit is connected to the battery protection chip through the boost unit.

9. The battery module according to claim 6, characterized in that: Also includes: a second switch unit; The second electrode of the battery cell is also connected to the second connector through the second switch unit; The battery protection chip is connected to the second switch unit; when the first connector and / or the second connector are not connected to the mainboard, the second switch unit is in an off state; When the first connector and the second connector are both connected to the mainboard, the battery cell supplies power to the battery protection chip, the battery protection chip outputs a second electrical signal to the second switch unit, and the second switch unit is in a conducting state under the action of the second electrical signal.

10. The battery module according to claim 9, characterized in that: The second switch unit includes: a fourth power switch tube and a fifth power switch tube; The source of the fourth power switch tube is connected to the second electrode of the battery cell, the source of the fifth power switch tube is connected to the second connector, the gates of the fourth power switch tube and the fifth power switch tube are respectively connected to the battery protection chip, and the drain of the fourth power switch tube is connected to the drain of the fifth power switch tube; Among them, when the first connector and / or the second connector are not connected to the mainboard, the fourth power switch tube and the fifth power switch tube are both in the off state; when the first connector and the second connector are both connected to the mainboard, the battery cell supplies power to the battery protection chip, and the battery protection chip outputs a second electrical signal to the fourth power switch tube and the fifth power switch tube, and the fourth power switch tube and the fifth power switch tube are both in the on state under the action of the second electrical signal.

11. An electronic device, characterized in that: The invention comprises the battery module as claimed in any one of claims 1 to 10, and also comprises the main board.

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