Battery modules, charging modules and electronic devices that support high-power fast charging

Abstract

One embodiment of the present application discloses a battery module that supports high-power fast charging. The battery module includes a battery cell, and the battery cell includes a battery cell body, a first pole lug, a second pole lug, and a third pole lug. The first pole lug, the second pole lug, and the third pole lug are electrically connected to the battery cell body, respectively. The first pole lug and the third pole lug have a first polarity, and the second pole lug has a second polarity. The second pole lug cooperates with the first pole lug to input voltage and current to the battery cell body or to output voltage and current from the battery cell body. The second pole lug cooperates with the third pole lug to input voltage and current to the battery cell body or to output voltage and current from the battery cell body. The first polarity is different from the second polarity.

Description

Technical Field

[0001] The embodiments of the present application relate to charging technology, and in particular to a battery module, a charging module, and an electronic device that support high-power fast charging. Background Art

[0002] Charging systems currently used in electronic devices include a processing circuit and a battery cell. The processing circuit processes the charging voltage and current received from the external device and then provides them to the battery cell. The battery cell then stores energy based on the charging voltage and current. In the prior art, each battery cell includes a positive and a negative tab, which provide charging and discharging paths for the battery cell.

[0003] With the increasing demand for fast charging of battery cells, in order to solve the problem of fast charging, existing technologies can increase the charging speed by adding battery cells and processing circuits to the charging system. However, the battery cells and processing circuits require additional physical space, resulting in an inability to meet the layout space restrictions of electronic terminals. Therefore, if the battery cells are not increased, it is necessary to increase the charging and discharging current of a single battery cell to improve charging efficiency. However, increasing the charging and discharging current of a single battery cell can easily lead to a sharp increase in the heat generated by the tab, resulting in the processing circuit and battery cell being unable to meet the heat generation restrictions of the electronic terminal. Summary of the Invention

[0004] To solve the aforementioned problems, the embodiments of the present application provide a battery module, a charging module, and an electronic device that support high-power fast charging, generate less heat, and occupy less space.

[0005] One embodiment of the present application provides a battery module, comprising a battery cell. The battery cell comprises a battery cell body, a first tab, a second tab, and a third tab; the first tab, the second tab, and the third tab are electrically connected to the battery cell body, respectively; the first tab and the third tab have a first polarity, and the second tab has a second polarity.

[0006] The second tab, in conjunction with the first tab, can input voltage and current into the cell body, or output voltage and current from the cell body. The second tab, in conjunction with the third tab, can input voltage and current into the cell body, or output voltage and current from the cell body. The first polarity and the second polarity are opposite polarities; when the first polarity is positive, the second polarity is negative. The first polarity is negative, and the second polarity is positive.

[0007] For the battery cell, charging is performed by forming at least two conductive paths through the three pole ears, thereby effectively improving the charging efficiency of the battery cell. At the same time, since the two conductive paths shunt the current during charging, the current transmitted in each pole ear is effectively reduced, thereby effectively reducing the heat generated by each pole ear.

[0008] In one embodiment of the present application, a first battery protection board is further included, which includes a first protection circuit, a first battery interface and a second battery interface; the first battery interface and the second battery interface are used to electrically connect to components outside the battery module.

[0009] The first battery interface is electrically connected to the second tab and the first tab respectively through the first protection circuit, and the first battery interface, the first tab, the battery cell body, the second tab, and the first protection circuit form a first conductive loop. The second battery interface is electrically connected to the second tab and the third tab respectively through the first protection circuit, and the second battery interface, the third tab, the battery cell body, the second tab, and the first protection circuit form a second conductive loop.

[0010] The first protection circuit is used to detect the voltage and current of the first conductive loop and the second conductive loop. When the voltage or the current exceeds a threshold range, the first protection circuit disconnects the first conductive loop and the second conductive loop.

[0011] The first battery protection board and the three tabs form two conductive circuits to charge the battery cells. The first protection circuit detects the current of charging or discharging the battery cells to prevent the battery cells from being damaged due to overvoltage, undervoltage or overcurrent during the charging or discharging process, thereby ensuring the safety of the battery cells.

[0012] In one embodiment of the present application, the first pole tab, the second pole tab, and the third pole tab are all arranged on the first side of the battery cell body. Alternatively, the first pole tab and the second pole tab are arranged on the first side of the battery cell body, and the third pole tab is arranged on the second side of the battery cell body. The first pole tab and the third pole tab are arranged on the first side of the battery cell body, and the second pole tab is arranged on the second side of the battery cell body. Alternatively, the first pole tab is arranged on the first side of the battery cell body, the second pole tab is arranged on the second side of the battery cell body, and the third pole tab is arranged on the third side of the battery cell body.

[0013] The setting of the three tabs is not limited by the specific position on the battery cell body. The setting position of each tab can be adjusted according to actual conditions to ensure the coordination between the battery cell and other circuits, thereby reducing the wiring complexity and improving the integration of the charging module.

[0014] In one embodiment of the present application, the first pole tab, the second pole tab, and the third pole tab are all arranged on the first side of the battery cell body, and the first pole tab and the third pole tab are respectively arranged on both sides of the second pole tab.

[0015] The three tabs are arranged on the same side of the battery cell, and two tabs with the same first polarity are arranged on both sides of a tab with a second polarity, so that the connection wiring between the two tabs and the first battery protection board is more uniform and simple.

[0016] In one embodiment of the present application, the battery cell further includes a fourth tab, a fifth tab, and a sixth tab; the fourth tab, the fifth tab, and the sixth tab are electrically connected to the battery cell body, respectively; the fourth tab and the sixth tab have the first polarity, and the fifth tab has the second polarity; or, the fourth tab and the sixth tab have the second polarity, and the fifth tab has the first polarity;

[0017] The fifth electrode tab cooperates with the fourth electrode tab to input voltage and current to the battery cell body or output voltage and current from the battery cell body;

[0018] The fifth electrode tab cooperates with the sixth electrode tab to input voltage and current to the battery cell body or output voltage and current from the battery cell body.

[0019] For the battery cell, charging is performed by forming at least four conductive paths through the six pole ears, thereby further improving the charging efficiency of the battery cell. At the same time, since the four conductive paths divert the current during charging to a greater extent, the current transmitted in each pole ear is effectively reduced, thereby effectively reducing the heat generated by each pole ear.

[0020] In one embodiment of the present application, a second battery protection board is further included, which includes a second protection circuit, a third battery interface and a fourth battery interface; the third battery interface and the fourth battery interface are used to electrically connect to components outside the battery module.

[0021] The third battery interface is electrically connected to the fifth and fourth tabs, respectively, through the second protection circuit. The third battery interface, the fourth tab, the battery cell body, the fifth tab, and the second protection circuit form a third conductive loop. The fourth battery interface is electrically connected to the fifth and sixth tabs, respectively, through the second protection circuit. The fourth battery interface, the sixth tab, the battery cell body, the fifth tab, and the second protection circuit form a fourth conductive loop.

[0022] The second protection circuit is used to detect the voltage and current of the third conductive loop and the fourth conductive loop. When the voltage or the current exceeds a threshold range, the second protection circuit disconnects the third conductive loop and the fourth conductive loop.

[0023] The second battery protection board and the other three tabs form two conductive circuits to charge the battery cells. The second protection circuit detects the current of charging or discharging the battery cells to prevent the battery cells from being damaged due to overvoltage, undervoltage or overcurrent during the charging or discharging process, thereby ensuring the safety of the battery cells.

[0024] In one embodiment of the present application, the first protection circuit and the second protection circuit have the same circuit structure. Therefore, the protection of the battery cells is basically consistent and synchronous, further ensuring the safety of the battery cells.

[0025] In one embodiment of the present application, the first, second, and third tabs are all disposed on a first side of the cell body, and the fourth, fifth, and sixth tabs are all disposed on a second side of the cell body. The first side of the cell body and the second side of the cell body are opposite sides of the cell body; alternatively, the first side of the cell body and the second side of the cell body are adjacent sides of the cell body.

[0026] Three tabs are arranged on the same side of the battery cell, and the other three tabs are arranged on the other side of the battery cell, and two tabs with the same first polarity are arranged on both sides of a tab with a second polarity, so that the connection wiring between the two tabs and the first battery protection board is more uniform and simple, and the heat dissipation space of each tab is larger and the heat dissipation is more uniform.

[0027] In one embodiment of the present application, the first protection circuit includes a first protection control unit, a first sampling unit, and a first switching unit. The first protection control unit is electrically connected to the first conductive loop and the second conductive loop, respectively, and detects the voltage of the first conductive loop and the second conductive loop. The first sampling unit is electrically connected to the second tab, the first protection control unit, and the first switching unit, respectively, and detects the current of the first conductive loop and the second conductive loop via the first sampling unit. The first switching unit is electrically connected to the first protection control unit, the first sampling unit, the first battery interface, and the second battery interface, respectively. The first protection control unit is configured to control the switching unit to disconnect the first conductive loop and the second conductive loop when it determines that the voltage or current of the first conductive loop or the second conductive loop exceeds a first threshold range.

[0028] By detecting the current of the two conductive circuits by the first sampling unit and the voltage collected by the first protection control unit, it is possible to accurately determine whether the voltage and current transmitted on each pole ear exceed the corresponding threshold range, and when the voltage and current transmitted on each pole ear exceed the corresponding threshold range, the conductive circuit connected to the pole ear is cut off in time to ensure the safety of the battery cell.

[0029] In one embodiment of the present application, the first switch unit includes a first switch and a second switch, wherein the first switch is located in the first conductive loop and the second switch is located in the second conductive loop. The two switches can easily and promptly cut off the conductive loop connected to the tab.

[0030] In one embodiment of the present application, the first protection circuit further includes a second protection control unit and a second switch unit.

[0031] The second protection control unit is electrically connected to the first conductive loop and the second conductive loop respectively, and the second protection control unit detects the voltage of the first conductive loop and the second conductive loop;

[0032] The second protection control unit is electrically connected to the first sampling unit, and is configured to detect the currents of the first conductive loop and the second conductive loop through the first sampling unit;

[0033] The second switch unit is electrically connected to the second protection control unit, the first switch unit, the first battery interface, and the second battery interface respectively;

[0034] The second protection control unit is configured to control the second switch unit to disconnect when it is determined that the voltage or current of the first conductive circuit or the second conductive circuit exceeds a second threshold range, so as to disconnect the first conductive circuit and the second conductive circuit.

[0035] Specifically, the first threshold range is the same as the second threshold range, or the first threshold range is smaller than or larger than the second threshold range.

[0036] The second protection control unit and the second switch unit can promptly replace the first protection control unit and the first switch unit in the first protection circuit to perform battery cell protection after the first protection circuit fails. That is, the first protection circuit and the second protection circuit can replace each other and work synchronously, further improving the reliability of battery cell protection.

[0037] In one embodiment of the present application, the second switch unit includes a third switch and a fourth switch, wherein the third switch is located in the first conductive loop and the fourth switch is located in the second conductive loop. The two switches can easily and promptly cut off the conductive loop connected to the tab.

[0038] In one embodiment of the present application, the battery cell body has a wound structure. The battery cell includes a first pole piece having the first polarity and a second pole piece having the second polarity. The first pole piece and the third pole piece are arranged on the first pole piece, and the second pole piece is arranged on the second pole piece. The first pole piece and the second pole piece are wound to form the battery cell having three pole pieces, and the first pole piece, the second pole piece, and the third pole piece are located at different positions in the battery cell. By arranging multiple pole pieces on different pole pieces and winding them, the manufacturing process of the three pole pieces is effectively simplified.

[0039] In one embodiment of the present application, the battery cell has a wound structure. The battery cell includes a first pole piece having the first polarity and a second pole piece having the second polarity. The first pole piece, the third pole piece, the fourth pole piece, and the sixth pole piece are arranged on the first pole piece, and the second pole piece and the fifth pole piece are arranged on the second pole piece. The first pole piece and the second pole piece are wound to form the battery cell having six pole pieces, and the first pole piece, the second pole piece, the third pole piece, the fourth pole piece, the fifth pole piece, and the sixth pole piece are located at different positions of the battery cell. By arranging multiple pole pieces on different pole pieces and winding them, the manufacturing process of the six pole pieces is effectively simplified.

[0040] In one embodiment of the present application, the battery cell has a laminated structure. The battery cell comprises at least two first pole pieces having the first polarity and at least two second pole pieces having the second polarity. A first sub-pole lug and a third sub-pole lug are provided on each of the first pole pieces, and a second sub-pole lug is provided on each of the second pole pieces. All of the first pole pieces and all of the second pole pieces are stacked to form the battery cell, all of the first sub-pole lugs are electrically connected to form the first pole lug, the second sub-pole lugs are electrically connected to form the second pole lug, and all of the third sub-pole lugs are electrically connected to form the third pole lug; the first pole lug, the second pole lug and the third pole lug are at different positions of the battery cell. By providing a plurality of pole lugs on different pole pieces and stacking them in sequence, the manufacturing process of the three pole lugs is effectively simplified.

[0041] In one embodiment of the present application, the battery cell has a laminated structure. The battery cell includes at least two first electrode sheets having the first polarity and at least two second electrode sheets having the second polarity. A first sub-electrode tab, a third sub-electrode tab, a fourth sub-electrode tab, and a sixth sub-electrode tab are provided on each first electrode sheet, and a second sub-electrode tab and a fifth sub-electrode tab are provided on each second electrode sheet. All of the first electrode sheets and all of the second electrode sheets are stacked to form the battery cell. All of the first sub-electrode tabs are electrically connected to form the first electrode tab, the second sub-electrode tabs are electrically connected to form the second electrode tab, all of the third sub-electrode tabs are electrically connected to form the third electrode tab, all of the fourth sub-electrode tabs are electrically connected to form the fourth electrode tab, the fifth sub-electrode tab is electrically connected to form the fifth electrode tab, and all of the sixth sub-electrode tabs are electrically connected to form the sixth electrode tab. The first, second, third, fourth, fifth, and sixth electrode tabs are located at different positions within the battery cell. By providing multiple electrode tabs on different electrode sheets and stacking them sequentially, the manufacturing process for the six electrode tabs is effectively simplified.

[0042] In one embodiment of the present application, the battery cell includes a battery cell body, a first pole tab, a second pole tab, a third pole tab, and a fourth pole tab. The first pole tab, the second pole tab, the third pole tab, and the fourth pole tab are electrically connected to the battery cell body, respectively; the first pole tab and the third pole tab have a first polarity, and the second pole tab and the fourth pole tab have a second polarity. The second pole tab cooperates with the first pole tab to input voltage and current into the battery cell body or output voltage and current from the battery cell body. The fourth pole tab cooperates with the third pole tab to input voltage and current into the battery cell body or output voltage and current from the battery cell body. The first polarity is positive, and the second polarity is negative; alternatively, the first polarity is negative, and the second polarity is positive.

[0043] For the battery cell, charging is performed by forming at least two conductive paths through the four pole ears, thereby effectively improving the charging efficiency of the battery cell. At the same time, since the two conductive paths are relatively independent and the current is diverted during charging, the current transmitted in each pole ear is effectively reduced, thereby effectively reducing the heat generated by each pole ear.

[0044] In one embodiment of the present application, the first and second tabs are disposed on the first side of the cell body, and the third and fourth tabs are disposed on the second side of the cell body. Alternatively, the first tab is disposed on the first side of the cell body, and the second, third, and fourth tabs are disposed on the second side of the cell body.

[0045] In one embodiment of the present application, the battery module further includes: a first battery protection board and a second battery protection board; the first battery protection board includes a first protection circuit and a first battery interface, and the second battery protection board includes a second protection circuit and a second battery interface. The first battery interface is electrically connected to the second and first tabs, respectively, via the first protection circuit. The first battery interface, together with the first tab, the cell body, the second tab, and the first protection circuit, forms a first conductive loop. The second battery interface is electrically connected to the third and fourth tabs, respectively, via the second protection circuit. The second battery interface, together with the third tab, the cell body, the fourth tab, and the first protection circuit, forms a second conductive loop. The first protection circuit is configured to detect the voltage and current of the first conductive loop. When the voltage or current exceeds a threshold range, the first protection circuit disconnects the first conductive loop. The second protection circuit is configured to detect the voltage and current of the second conductive loop. When the voltage or current exceeds a threshold range, the second protection circuit disconnects the second conductive loop.

[0046] In one embodiment of the present application, the battery cell has a wound structure. The battery cell body includes a first pole piece having the first polarity and a second pole piece having the second polarity; the first pole piece and the third pole piece are arranged on the first pole piece; the second pole piece and the fourth pole piece are arranged on the second pole piece. The first pole piece and the second pole piece are wound to form the battery cell body having four pole pieces, and the first pole piece, the second pole piece, the third pole piece and the fourth pole piece are located at different positions in the battery cell body. By arranging multiple pole pieces on different pole pieces and winding them, the manufacturing process of the four pole pieces is effectively simplified.

[0047] In one embodiment of the present application, the battery cell body is a laminated structure. The battery cell body includes at least two first pole pieces having the first polarity and at least two second pole pieces having the second polarity. A first sub-pole lug and a third sub-pole lug are provided on each first pole piece, and a second sub-pole lug and a fourth sub-pole lug are provided on each second pole piece. All the first pole pieces and all the second pole pieces are stacked to form the battery cell body, all the first sub-pole lugs are electrically connected to form the first pole lug, the second sub-pole lugs are electrically connected to form the second pole lug, all the third sub-pole lugs are electrically connected to form the third pole lug, and all the fourth sub-pole lugs are electrically connected to form the fourth pole lug. The first pole lug, the second pole lug, the third pole lug and the fourth pole lug are located at different positions of the battery cell body. By providing a plurality of pole lugs on different pole pieces and stacking them in sequence, the manufacturing process of the four pole lugs is effectively simplified.

[0048] In one embodiment of the present application, a charging module is provided, comprising the aforementioned battery module and a circuit board. The circuit board is electrically connected to the battery module and is configured to receive a first charging voltage provided externally and convert the charging voltage into the voltage and current, which are then output to the battery module. In the charging module, the battery cell includes at least two conductive paths for charging the tabs, thereby effectively increasing the number of charging paths for the cell and reducing the current carried by each tab, thereby shortening the charging time and effectively reducing the heat generated by each tab.

[0049] In one embodiment of the present application, the circuit board includes a first circuit board and a third circuit board. The first circuit board includes an interface for receiving the first charging voltage and converting the first charging voltage into a second charging voltage. The first circuit board transmits the second charging voltage to the third circuit board. The third circuit board is electrically connected to the battery module and is configured to convert the second charging voltage into the voltage and output it to the battery module. The first circuit board and the second circuit board cooperate to process the received charging voltage into a voltage suitable for charging the battery cell, thereby ensuring the safety of the battery cell during charging.

[0050] In one embodiment of the present application, the circuit board includes a first circuit board and a third circuit board. The first circuit board includes an interface for receiving the first charging voltage and transmitting the first charging voltage to the third circuit board. The third circuit board is electrically connected to the battery module and is configured to convert the first charging voltage into the voltage and output it to the battery module. The first circuit board and the second circuit board cooperate to process the received charging voltage into a voltage suitable for charging the battery cell, thereby ensuring the safety of the battery cell during charging.

[0051] In one embodiment of the present application, the circuit board further includes a second circuit board. The first circuit board and the third circuit board are disposed on opposite sides of the battery module. The second circuit board spans the battery cell body and electrically connects the first circuit board and the second circuit board, respectively. The second circuit board connects the first and third circuit boards, ensuring flexibility in the placement of the first and third circuit boards.

[0052] In one embodiment of the present application, the charging module is used to provide working power for the functional circuit.

[0053] In one embodiment of the present application, an electronic device is provided, including a functional circuit and the aforementioned charging module, wherein the charging module is used to provide working power for the functional circuit.

[0054] In one embodiment of the present application, the battery cell has a wound structure, and the wound battery cell includes a positive electrode sheet and a negative electrode sheet, and the positive electrode sheet and the negative electrode sheet are respectively provided with a positive electrode tab and a negative electrode tab; and at least one of the positive electrode sheet and the negative electrode sheet is provided with at least two tabs of the same polarity at different positions, and the at least two tabs of the same polarity form at least two tabs of the same polarity at different positions of the wound core, so that the wound core contains at least three tabs.

[0055] In one embodiment of the present application, the battery cell has a laminated structure, and the laminated battery cell includes one or more positive pole sheets and one or more negative pole sheets, and each of the positive pole sheets and negative pole sheets is respectively provided with at least one positive pole tab and negative pole tab, and among the positive pole sheets or negative pole sheets, at least one positive (negative) pole sheet is provided with at least two positive (negative) pole tabs at different positions, or the positive (negative) pole tabs on at least two positive (negative) pole sheets are located at different positions on the pole sheets, so that the laminated battery cell includes at least three pole tabs.

[0056] In one embodiment of the present application, the battery cell includes at least three tabs, and the three tabs are located on the same side of the battery cell; or the three tabs are located on different sides of the battery cell.

[0057] The embodiment of the present application adopts a multi-battery interface and multi-tab mode to expand the current capacity of the battery cell.

[0058] Multi-tab: can be 3 tabs, 4 tabs, 6 tabs, N tabs. Among them, the negative tab can be shared during charging and discharging, and the positive tab can also be shared. For example: 3 tabs include two positive tabs and one negative tab, and the negative tab is shared (such as Figure 2A As shown); Alternatively, the 3-pole tab includes two negative pole tabs and one positive pole tab, which is shared by the positive pole tab (as shown in FIG. Figure 8 ). The 6-tab structure may include the two 3-tab structures. Furthermore, more tabs may be included, such as 8 tabs, 9 tabs, 12 tabs, etc.

[0059] The embodiment of the present application uses a charger IC (charging circuit) with a high-efficiency voltage drop ratio (for example, 4:1, or other larger ratios) to step down the voltage. Under the condition that the input current bottleneck of the external charging cable (and the PD protocol limit) is 5A, the charging power is increased by increasing the input voltage.

[0060] The multi-electrode tabs of the embodiment of the present application may be implemented in one of the following ways:

[0061] A. By adding a tab and reusing a tab (i.e., the shared positive electrode or shared negative electrode mentioned above), the current is shunted, which not only reduces the impedance of the tab, but also reduces the heat generation of the battery body (including the battery cell and the battery protection plate); wherein, structurally, the volume of the shared tab can be increased, for example, the shared tab can be widened, lengthened, and / or thickened.

[0062] B. Extended tabs: The battery cell has a double-sided tab structure to increase the current flow of the battery cell, including but not limited to four-pole tabs, six-pole tabs and other structures. The structure of the four-pole tab is as follows Figure 9 As shown, there is a pair of positive and negative tabs on each side of the battery cell. The structure of the 6 tabs is as follows Figure 14A As described above, there are three tabs on each side of the battery cell. Figure 14A What is shown in FIG is a shared negative electrode. Similarly, a shared positive electrode can also be used.

[0063] In the 3-tab, 6-tab and other solutions of the embodiments of the present application, the protection IC (i.e., the protection IC in the battery protection board) can be reused through the distribution of the tabs and circuit optimization, thereby achieving high-power charging of a single battery cell and avoiding the safety issues of dual batteries.

[0064] The embodiments of the present application can solve the problems of insufficient current flow capacity and high heat generation of a single battery cell, and can also solve the problems of high cost of dual batteries, the need for an additional set of protection ICs, and large capacity loss when splitting.

[0065] The embodiment of the present application reduces the heat generation of the battery cell and increases the current flow capacity of the battery cell through the multi-pole tabs of the battery. The embodiment of the present application implements a set of protection schemes for the protection IC through the current path planning of the dual battery interface; while reducing the heat generation of the battery cell, it reduces the cost and has high safety compared to the dual-cell battery. The embodiment of the present application implements a higher power charging scheme without increasing the heat of the entire device through the multi-pole tabs and the high-efficiency pressure difference ratio (for example, 4:1) charger IC. The embodiment of the present application uses the higher power current flow capacity of the multi-pole tabs to enable high-power charging of a single battery cell, thereby solving the problems caused by the dual-cell battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 This is a circuit block diagram of a charging module in one embodiment of the present application;

[0067] Figure 2A and Figure 2B Schematic diagram of the planar structure of the battery cell;

[0068] Figure 3A and Figure 3B for Figure 1 The circuit block diagram of the first battery protection board is shown;

[0069] Figure 4A for Figure 1The circuit block diagram of the first protection circuit and the protection circuit shown;

[0070] Figure 4B This is a circuit block diagram of a first protection circuit and a protection circuit in another embodiment of the present application;

[0071] Figure 5 For example Figure 4A A schematic diagram of the specific circuit structure of the first protection board in the battery module shown;

[0072] Figure 6 This is a circuit block diagram of a battery module in a charging module in another embodiment of the present application;

[0073] Figure 7 This is a circuit block diagram of a charging module in another embodiment of the present application;

[0074] Figure 8 This is a circuit block diagram of a battery module in a charging module in another embodiment of the present application;

[0075] Figure 9 This is a circuit block diagram of a charging module in another embodiment of the present application;

[0076] Figure 10 This is the circuit block diagram of the charging module;

[0077] Figure 11 Schematic diagram of the circuit structure of the battery module;

[0078] Figure 12 This is a schematic diagram of the circuit structure of one of the first battery protection boards;

[0079] Figure 13 This is a circuit block diagram of a charging module in another embodiment of the present application;

[0080] Figure 14A for Figure 13 A schematic diagram of the structure of the battery module in the charging module shown;

[0081] Figure 14B A schematic diagram of a pentapole provided in one embodiment of the present application;

[0082] Figure 15 For example Figure 13 Schematic diagram of the circuit structure of the battery module in the charging module shown;

[0083] Figure 16A 、 Figure 16B 、 Figure 16C This is a schematic diagram of the exploded structure of a battery cell with three tabs in one embodiment of the present application;

[0084] Figure 17 for Figure 16A A top view of the battery cell shown;

[0085] Figure 18 for Figure 16A The front structure diagram of the battery cell shown;

[0086] Figure 19 Schematic diagram of the exploded structure of a battery cell with three tabs in one embodiment of the present application;

[0087] Figure 20 for Figure 19 A top view of the battery cell shown;

[0088] Figure 21 Schematic diagram of the exploded structure of a battery cell with three tabs in one embodiment of the present application;

[0089] Figure 22 for Figure 21 A top view of the battery cell shown;

[0090] Figure 23 Schematic diagram of the exploded structure of a battery cell with three tabs in one embodiment of the present application;

[0091] Figure 24 for Figure 23 A top view of the battery cell shown;

[0092] Figure 25 for Figure 24 The front structure diagram of the battery cell shown;

[0093] Figure 26 Schematic diagram of the exploded structure of a battery cell with three tabs in one embodiment of the present application;

[0094] Figure 27 for Figure 26 Schematic diagram of the three-dimensional structure of the battery cell shown;

[0095] Figure 28 for Figure 27 Left side view of the battery cell shown;

[0096] Figure 29 This is a schematic diagram of the exploded structure of a battery cell in one embodiment of the present application;

[0097] Figure 30 This is a schematic diagram of the exploded structure of a battery cell in one embodiment of the present application;

[0098] Figure 31 for Figure 30 Schematic diagram of the three-dimensional structure of the battery cell shown;

[0099] Figure 32 for Figure 31 Left side view of the battery cell shown;

[0100] Figure 33 for Figure 31A front view of the battery cell;

[0101] Figure 34 Schematic diagram of the exploded structure of a battery cell with six tabs in one embodiment of the present application;

[0102] Figure 35 Schematic diagram of the exploded structure of a battery cell with six tabs in one embodiment of the present application;

[0103] Figure 36 for Figure 34 Schematic diagram of the planar structure of the battery cell shown;

[0104] Figure 37 This is a schematic diagram of a planar structure of a battery cell with four tabs in one embodiment of the present application;

[0105] Figure 38 For example Figure 36 The front structure diagram of the battery cell shown;

[0106] Figure 39 Schematic diagram of a battery cell with three tabs in one embodiment of the present application;

[0107] Figure 40 Schematic diagram of a battery cell with four tabs in one embodiment of the present application;

[0108] Figure 41 Schematic diagram of a battery cell with five tabs in one embodiment of the present application;

[0109] Figure 42 Schematic diagram of a battery cell with six tabs in one embodiment of the present application;

[0110] Figure 43 A schematic diagram of a non-transmissive battery cell according to an embodiment of the present application;

[0111] Figure 44 A schematic diagram of a through-type battery cell according to an embodiment of the present application;

[0112] Figure 45 Schematic diagram of a battery cell with three tabs in one embodiment of the present application;

[0113] Figure 46 Schematic diagram of a battery cell with four tabs in one embodiment of the present application;

[0114] Figure 47 Schematic diagram of a battery cell with five tabs in one embodiment of the present application;

[0115] Figure 48 FIG. 1 is a schematic diagram of a battery cell with six tabs in one embodiment of the present application. DETAILED DESCRIPTION

[0116] See also Figure 1 , which is a circuit block diagram of the charging module 10 in one embodiment of the present application.

[0117] like Figure 1 As shown, the charging module 10 includes a first circuit board 11, a second circuit board 12, a third circuit board 13, and a battery module 100 including battery cells 14 and a first battery protection board 15. The first circuit board 11, the second circuit board 12, and the third circuit board 13 cooperate to process the voltage and current received from the outside for charging into a voltage and current suitable for charging the battery module 100. The battery module 100 receives the processed voltage and current and charges and stores electrical energy. At the same time, the battery module 100 can also release the stored electrical energy to the third circuit board 13 for discharge, providing driving power for the third circuit board 13 and other functional circuits (not shown).

[0118] Specifically, the first circuit board 11 is used to receive a first charging voltage and a first charging current from the outside, and perform voltage conversion on the first charging voltage to convert the first charging voltage into a second charging voltage. The second circuit board 12 is electrically connected to the first circuit board 11 and the third circuit board 13, and is used to provide the first charging voltage and the first charging current to the third circuit board 13. The third circuit board 13 is electrically connected to the first battery protection board 15, and the third circuit board 13 is used to perform voltage conversion processing on the second charging voltage into a cell voltage, and provide the cell voltage to the first battery protection board 15. At the same time, the first circuit board 11 and the third circuit board 13 also convert the first charging current into a cell current.

[0119] The first battery protection board 15 is electrically connected to the battery cell 14 and is used to transmit the battery cell voltage and battery cell current to the battery cell 14 through at least two conductive paths, so that the battery cell 14 performs energy storage and charging; or the battery cell 14 transmits the battery cell voltage and battery cell current to the first battery protection circuit 15 through at least two conductive paths, so that the battery cell 14 releases the stored energy to the third circuit board 13 for discharge.

[0120] In this embodiment, the cell voltage is less than the first charging voltage and the second charging voltage. The cell voltage is the rated voltage for charging and discharging the cell 14. For example, the cell voltage is 5 volts (V) and the first charging current is 12 amperes (A). In other embodiments of the present application, the first circuit board 11 can be directly electrically connected to the third circuit board 13 without the need for a second circuit board 12 to perform the connection. That is, in another embodiment, there can be no second circuit board 12, and the first circuit board 11 and the third circuit board 13 can be directly electrically connected. Alternatively, in another embodiment, the first circuit board 11 and the third circuit board 13 can be implemented by the same circuit board, that is, the first circuit board 11 and the third circuit board 13 are the same circuit board, and there is no second circuit board 12.

[0121] It should be noted that the first circuit board 11, the second circuit board 12, and the third circuit board 13 are each provided with a plurality of functional circuits and conductive lines to process and transmit the received voltage and current. More specifically, the first circuit board 11 includes a first transmission interface 111 and a first voltage conversion unit C1. The first transmission interface 111 is used to electrically connect to an external power supply system and to receive a first charging voltage and a first charging current. In this embodiment, the first transmission interface 111 can be, for example, a Mini USB interface, a Micro USB 2.0 interface, a Micro USB 2.0 interface, or a Type-C interface. The first charging voltage is, for example, 12 volts (V), and the first charging current is, for example, 5 amperes (A).

[0122] The first voltage conversion unit C1 is electrically connected to the first transmission interface 111 and is configured to convert the first charging voltage into a second charging voltage, for example, by stepping down the first charging voltage. In this embodiment, the first voltage conversion unit C1 is capable of stepping down the input voltage by up to 1 / 2 before outputting it. This means that the second charging voltage (output voltage) can be at least 1 / 2 of the first charging voltage (input voltage). During the charging process, the first voltage conversion unit C1 determines the step-down ratio based on actual conditions. Of course, in other embodiments of the present application, the first voltage conversion unit C1 may have other step-down capabilities (4:1, 3:1, or other ratios). For example, the first voltage conversion unit C1 may be a 4:1 charger IC capable of stepping down the output voltage to 1 / 4 of the input voltage. It should be noted that in other embodiments, conversion of the first charging voltage may not be necessary, for example, stepping down the first charging voltage may not be necessary. For example, if the first charging voltage is relatively low, stepping down is not necessary. In this case, the first circuit board 11 may not include the first voltage conversion unit C1, and the first circuit board 11 may directly transmit the first charging voltage to the third circuit board 13.

[0123] The second circuit board 12 includes a first connection interface 121 and a second connection interface 122. The first connection interface 121 is electrically connected to the first circuit board 11, and the second connection interface 122 is electrically connected to the third circuit board 13. In this embodiment, the first circuit board 11 and the third circuit board 13 are positioned on opposite sides of the battery cell 14. Thus, the second circuit board 12 spans opposite sides of the battery cell 14, electrically connecting the first circuit board 11 and the third circuit board 13 to transmit the second charging voltage to the third circuit board 13. In this embodiment, the second circuit board 12 may be a flexible circuit board.

[0124] It should be noted that the embodiments of the present application do not limit the locations of the first circuit board 11, the second circuit board 12, and the third circuit board 13. The structures in the embodiments and drawings are only exemplary descriptions of the connection relationship and do not limit the specific arrangement of each component. For example: Figure 1 The second circuit board 12 is located on the left side of the figure. In actual products, the second circuit board 12 can be set in any suitable position. For example, for balance, the second circuit board 12 can be set in the middle position, that is, the battery cells and protection circuits can be symmetrical around the second circuit board 12.

[0125] The third circuit board 13 includes a first conductive interface 131, a second conductive interface 132, and two second voltage conversion units C2. During specific implementation, the third circuit board 13 may also generally include other circuit elements to cooperate in realizing the charging and discharging functions of the electronic device. For example, the third circuit board 13 may also include a first sampling unit 133 and a fuel gauge 134. The first sampling unit 133 is electrically connected to the first conductive interface 131 and the second conductive interface 132. The fuel gauge 134 is electrically connected to the first sampling unit 133. The first sampling unit 133 may be a sampling resistor for sampling during current detection or power detection. The fuel gauge 134 (also called a coulomb meter) is used to measure the battery charge. The fuel gauge 134 can measure the battery charge through a sampling resistor.

[0126] The two second voltage conversion units C2 are respectively electrically connected to the second connection interface 122, and are respectively used to receive the second charging voltage and the charging current, and convert the second charging voltage into the cell voltage, for example, the second charging voltage can be stepped down to become the cell voltage. In this embodiment, the second voltage conversion unit C2 can be a 2:1 charging IC, which can reduce the input voltage by up to 1 / 2 before outputting it, that is, the cell voltage (output voltage) can be at least 1 / 2 of the second charging voltage (input voltage). During the charging process, the second voltage conversion unit C2 determines the magnitude of the voltage reduction based on actual conditions. In other embodiments of the present application, the second voltage conversion unit C2 can have other voltage reduction capabilities (4:1, 3:1 or other ratios of voltage reduction), for example, the second voltage conversion unit C2 can be a 4:1 charging IC (chargerIC), which can reduce the output voltage to 1 / 4 of the input voltage.

[0127] It should be noted that the voltages described in the various embodiments of this application are for illustrative purposes only. During the actual charging process of the battery module 100, the charging or discharging voltage may fluctuate. Currently, the maximum cell voltage of the battery module 14 during charging cannot exceed 5V, and the maximum cell voltage is generally 4.22V or 4.45V.

[0128] The two second voltage conversion units C2 are electrically connected to the first conductive interface 131 and the second conductive interface 132, respectively, to provide the cell voltage and cell current to the first conductive interface 131 and the second conductive interface 132, respectively. In other words, the first conductive interface 131 receives the cell voltage and cell current, and the second conductive interface 132 also receives the cell voltage and cell current.

[0129] In one embodiment of the present application, the two second voltage conversion units C2 may be, for example, charging ICs (charger ICs). Both charging ICs may be primary charging ICs, or one may be a primary charging IC and the other a secondary charging IC. In addition to performing voltage conversion, the primary charging IC also supports other charging functions, such as BUCK charging and USB On-The-Go (USB On-The-Go) functionality. The secondary charging IC is primarily used to perform voltage conversion, increase charging current, and other functions.

[0130] Please combine Figure 1 See also Figure 2A , which is a schematic diagram of the planar structure of the battery cell 14.

[0131] like Figure 1 and Figure 2A As shown, the battery cell 14 includes a battery cell body 140, a first side 141, and a second side 142. The first circuit board 11 is disposed on one side of the first side 141 of the battery cell 14, while the third circuit board 13 and the first battery protection board 15 are disposed on one side of the second side 142 of the battery cell. The second circuit board 12 spans the first side 141 and the second side 142 of the battery cell 14, electrically connecting the first circuit board 11 and the third circuit board 13, respectively.

[0132] In this embodiment, the first side 141 of the battery cell body 140 is provided with a tab 14a, a tab 14b, and a tab 14c. Tab 14a has polarity 1, while tabs 14b and 14c have polarity 2. Polarity 1 and polarity 2 are opposite. Polarity 1 is positive, and polarity 2 is negative. Alternatively, polarity 1 is negative, and polarity 2 is positive.

[0133] Tab 14b and tab 14a form the positive and negative poles of a conductive loop, and tab 14c and tab 14a form the positive and negative poles of a conductive loop, thereby respectively inputting (charging) or outputting (discharging) voltage and current to the cell body 140 through the two conductive loops.

[0134] In this embodiment, the tab 14 b and the tab 14 c may be directly electrically connected, that is, the voltage (potential) of the tab b and the tab c are the same.

[0135] Thus, the battery cell 14 includes two conductive circuits for charging or discharging, which can improve the charging efficiency of the battery cell 14 and reduce the charging time without increasing the charging current transmitted by each tab. It should be noted that the position of these tabs in the battery cell is not limited in this embodiment; as long as the electrical connection relationship is the same, the solution of this embodiment can be implemented. The position of the tabs in the battery cell is described in detail in the subsequent specific structural embodiments of the battery cell.

[0136] Please combine Figure 1 See also Figure 3A , Figure 3A for Figure 1 The circuit block diagram of the first battery protection board 15 is shown.

[0137] like Figure 3A As shown, the first battery protection board 15 includes a first battery interface 151 , a second battery interface 152 , a first protection circuit 153 , and a second protection circuit 154 .

[0138] The first battery interface 151 is electrically connected to the first conductive interface 131 ( Figure 1 The second battery interface 152 is electrically connected to the second conductive interface 132 ( Figure 1 ).

[0139] The first protection circuit 153 is electrically connected between the tabs 14a, 14b, 14c and the first battery interface 151. Furthermore, the first protection circuit 153 is also electrically connected between the tabs 14a, 14b, 14c and the second battery interface 152. The first protection circuit 153 is configured to disconnect the conductive paths between the tabs 14a, 14b, 14c and the first battery interface 151, 152 when the voltage and current between the tabs 14a, 14b, 14c and the first battery interface 151, 152 exceed a threshold value during charging or discharging of the battery cell 14, thereby preventing damage to the battery cell 14.

[0140] The second protection circuit 154 is electrically connected between the tabs 14a, 14b, 14c and the first battery interface 151. Furthermore, the second protection circuit 154 is also electrically connected between the tabs 14a, 14b, 14c and the second battery interface 152. The second protection circuit 153 is configured to disconnect the conductive paths between the tabs 14a, 14b, 14c and the first battery interface 151, 152 when the voltage and current between the tabs 14a, 14b, 14c and the second battery interface 151, 152 exceed a threshold value during charging or discharging of the battery cell 14, thereby protecting the battery cell 14 from damage.

[0141] The first protection circuit 153 and the second protection circuit 154 simultaneously protect the battery cell 14. If either fails, the other can protect the battery cell 14. In other words, the first protection circuit 153 and the second protection circuit 154 can serve as each other's backup. If the first protection control unit 1531 fails, the second protection control unit 1541 will perform voltage and current protection. Alternatively, if the second protection control unit 1541 fails, the first protection control unit 1531 will perform voltage and current protection.

[0142] Among them, the voltage and current threshold ranges corresponding to the first protection circuit 153 for the input and output of the battery cell 14 and the voltage and current threshold ranges corresponding to the second protection circuit 154 for the input and output of the battery cell 14 can be the same or different. When the corresponding ranges of the two are different, the protection circuit that reaches the threshold range first performs the action of disconnecting the path. When the corresponding ranges of the two are the same, the protection circuit of the first protection circuit 153 and the second protection circuit 154 that has pre-detected that the voltage or current exceeds the corresponding threshold range performs the protection operation. More specifically, the first battery interface 151, the tab 14b, the battery cell body, the tab 14a and the first protection circuit 153 constitute a first conductive circuit, which transmits the battery cell voltage and battery cell current.

[0143] In this embodiment, the first conductive loop includes a first conductive path P1 and a third conductive path P3. The first conductive path P1 is located between the first battery interface 151 and the tab 14b, and the third conductive path P3 is located between the first battery interface 151 and the tab 14a.

[0144] The second battery interface 152 , the tab 14 c , the cell body, the tab 14 a and the first protection circuit 153 form a second conductive loop, which transmits the cell voltage and the cell current.

[0145] In this embodiment, the second conductive loop includes a second conductive path P2 and a fourth conductive path P4. The second conductive path P2 is located between the second battery interface 152 and the tab 14c. The fourth conductive path P4 is located between the second battery interface 152 and the tab 14a.

[0146] Optionally, the third conductive path P3 and the fourth conductive path P4 are directly electrically connected via a conductive line, so that the voltage and current flowing through the third conductive path P3 and the fourth conductive path P4 are substantially the same.

[0147] The first protection circuit 153 is used to detect the voltage and current of the first conductive circuit and the second conductive circuit. When the voltage exceeds a first voltage threshold range, the first protection circuit 153 disconnects the first and second conductive circuits to prevent overvoltage charging or undervoltage discharge of the battery cell 14. When the current exceeds a first current threshold, the first protection circuit 153 disconnects the two conductive circuits to prevent overcurrent charging or overcurrent discharge of the battery cell 14.

[0148] Similarly, the second protection circuit 154 is also used to detect the voltage and current of the first conductive circuit and the second conductive circuit. When the voltage exceeds a second voltage threshold range, the second protection circuit 154 disconnects the two conductive circuits to prevent overvoltage charging or undervoltage discharge of the battery cell 14. When the current exceeds a second current threshold, the second protection circuit 154 disconnects the two conductive circuits to prevent overcurrent charging or overcurrent discharge of the battery cell 14.

[0149] In this embodiment, the first voltage threshold range may be composed of undervoltage threshold 1 to overvoltage threshold 1, wherein undervoltage threshold 1 is smaller than overvoltage threshold 1. The second voltage threshold range may be composed of undervoltage threshold 2 to overvoltage threshold 2, wherein undervoltage threshold 2 is smaller than overvoltage threshold 2.

[0150] When the first voltage threshold range is the same as the second voltage threshold range, the undervoltage threshold 1 is equal to the undervoltage threshold 2, and the overvoltage threshold 1 is equal to the overvoltage threshold 2.

[0151] When the first voltage threshold range is different from the second voltage threshold range, undervoltage threshold 1 is not equal to undervoltage threshold 2, or overvoltage threshold 1 is not equal to overvoltage threshold 2. In one embodiment, undervoltage threshold 2 is less than undervoltage threshold 1, and overvoltage threshold 2 is greater than overvoltage threshold 1; or undervoltage threshold 2 is greater than undervoltage threshold 1, and overvoltage threshold 2 is greater than overvoltage threshold 1.

[0152] For example, the first voltage threshold range may be 2.4V to 4.422V, and the second voltage threshold range may be 2.2V to 4.45V, that is, overvoltage threshold 1 is 4.422V, undervoltage threshold 1 is 2.4V; overvoltage threshold 2 is 4.45V, and undervoltage threshold 2 is 2.2V. Alternatively, the first voltage threshold range may be 2.2V to 4.422V, and the second voltage threshold range may be 2.4V to 4.45V. A voltage exceeding the voltage threshold range means that the voltage is less than the undervoltage threshold or the voltage is greater than the overvoltage threshold.

[0153] In this embodiment, the first current threshold or the second current threshold is a specific value. The first current threshold and the second current threshold may be the same or different. The current exceeding the current threshold means that the current is greater than or equal to the current threshold.

[0154] Please combine Figure 1 See also Figure 4A , Figure 4A for Figure 1 FIG. 1 is a circuit block diagram of the first protection circuit 153 and the second protection circuit 154 .

[0155] like Figure 4A As shown, the first protection circuit 153 includes a first protection control unit 1531 , a first voltage sampling unit 1532 , a first current sampling unit 1534 and a first switch unit 1533 .

[0156] The first protection control unit 1531 is electrically connected to the first and second conductive loops, respectively. The first protection control unit 1531 detects the voltage and current in the first and second conductive loops and determines whether the detected voltage and current exceed corresponding threshold ranges. When the voltage and current exceed the corresponding threshold ranges, the first protection control unit 1531 outputs a protection signal to the first switch unit 1533. The first switch unit 1533 disconnects the first and second conductive loops based on the protection signal, thereby protecting the battery cell 14 from damage due to overvoltage, overcurrent, or undervoltage.

[0157] The first voltage sampling unit 1532 is electrically connected to the tabs 14b and 14c, respectively, and is configured to detect the cell voltage and transmit the detected cell voltage to the first protection control unit 1531. The first voltage sampling unit 1532 can be, for example, a sampling resistor. Alternatively, the embodiment of the present application may omit the voltage sampling unit, with the protection control unit directly detecting the voltage of the conductive circuit.

[0158] The first current sampling unit 1534 is electrically connected to the tab 14a, the first protection control unit 1531, and the first switch unit 1533, respectively, for detecting the currents of the first conductive loop and the second conductive loop and transmitting the currents to the first protection control unit 1531. The first current sampling unit 1534 may be, for example, a sampling resistor.

[0159] The first switch unit 1533 is electrically connected to the first protection control unit 1531, the first current sampling unit 1534, the first battery interface 151, and the second battery interface 152. The first switch unit 1533 is located in the third conductive path P3 of the first conductive loop and the fourth conductive path P4 of the second conductive loop.

[0160] In this embodiment, the first switch unit 1533 may include a first switch S1 and a second switch S2.

[0161] The first switch S1 is electrically connected to the first current sampling unit 1534, the first protection control unit 1531, and the third switch S3 in the second protection circuit 154. The first switch S1 is turned on or off according to the protection signal provided by the first protection control unit 1531.

[0162] The second switch S2 is electrically connected to the first current sampling unit 1534, the first protection control unit 1531, and the fourth switch S4 in the second protection circuit 154. The second switch S2 is turned on or off according to the protection signal provided by the first protection control unit 1531.

[0163] In this embodiment, the first switch S1 and the second switch S2 are synchronously turned on or off, and the first switch S1 and the second switch S2 can be implemented using the same type of MOS transistors, for example, both are N-type transistors, or both are P-type transistors. Of course, the first switch S1 and the second switch S2 can also be implemented using different types of transistors or other components.

[0164] like Figure 4A As shown, the embodiment of the present application may further include a second protection circuit 154. The second protection circuit 154 includes a second protection control unit 1541, a second voltage sampling unit 1542 and a second switch unit 1543.

[0165] The second protection control unit 1541 is electrically connected to the first and second conductive loops, respectively. The second protection control unit 1541 detects the voltage and current in the first and second conductive loops, and determines whether the voltage exceeds a second voltage threshold range and whether the current exceeds a corresponding current threshold range. When the voltage and current exceed the corresponding threshold ranges, the second protection control unit 1541 outputs a protection signal to the second switch unit 1543, which disconnects the first and second conductive loops based on the protection signal.

[0166] The second voltage sampling unit 1542 is electrically connected to the tabs 14b and 14c, respectively, and is configured to detect voltage and transmit the detected voltage to the second protection control unit 1541. In this embodiment, the circuit structures of the first voltage sampling unit 1532 and the second voltage sampling unit 1542 can be identical. Alternatively, the embodiment of the present application may also omit the voltage sampling unit, with the protection control unit directly detecting the voltage of the conductive loop.

[0167] In this embodiment, the first battery interface 151 and the second battery interface 152 can be directly electrically connected via a conductive wire, that is, the third conductive path P3 and the fourth conductive path P4 are short-circuited, so that the current flowing through the third conductive path P3 and the fourth conductive path P4 is substantially the same.

[0168] The second switch unit 1543 is electrically connected to the second protection control unit 1541, the first switch unit 1533, the first battery interface 151, and the second battery interface 152. The second switch unit 1543 is located in the third conductive path P3 in the first conductive loop and the fourth conductive path P4 in the second conductive loop.

[0169] In this embodiment, the second switch unit 1543 includes a third switch S3 and a fourth switch S4.

[0170] The third switch S3 is electrically connected to the first switch S1, the second protection control unit 1541, and the first battery interface 151. The third switch S3 is turned on or off according to the protection signal provided by the second protection control unit 1541.

[0171] When the third switch S3 and the first switch S1 are both in the on state, the first conductive loop is connected, and the first conductive path P1 and the third conductive path P3 are electrically connected. When the third switch S3 or the first switch S1 is in the off state, the first conductive loop is disconnected, and the first conductive path P1 and the third conductive path P3 are electrically disconnected.

[0172] The fourth switch S4 is electrically connected to the second switch S2, the second protection control unit 1541, and the second battery interface 152. The fourth switch S4 is turned on or off according to the protection signal provided by the first protection control unit 1541.

[0173] When both the fourth switch S4 and the second switch S2 are in the on state, the second conductive loop is open, and the second conductive path P2 and the fourth conductive path P4 are electrically connected. This means that the cell current and cell voltage can be transmitted between the second battery interface 152 and the tab 14a. When either the fourth switch S4 or the second switch S2 is in the off state, the second conductive loop is disconnected, and the second conductive path P2 and the fourth conductive path P4 are electrically disconnected.

[0174] In this embodiment, the third switch S3 and the fourth switch S4 are synchronously turned on or off, and the third switch S3 and the fourth switch S4 can be implemented using the same type of MOS transistors, for example, both are N-type transistors, or both are P-type transistors. Of course, the third switch S3 and the fourth switch S4 can also be implemented using different types of transistors or other components.

[0175] In another embodiment, the tab 14a can be divided into two tabs, and the two tabs cooperate with each other to have the same function as the tab 14a. Figure 2B As shown, the tabs 14a can be two tabs with the same polarity (also called sub-tabs). One of the tabs and the tab 14b form the positive and negative poles of a conductive loop, which can input voltage and current to the battery cell body or output voltage and current from the battery cell body; the other tab and the tab 14c form the positive and negative poles of another conductive loop, which can input voltage and current to the battery cell body or output voltage and current from the battery cell body. These two conductive loops are connected to the Figure 2A Correspondingly, when the tab 14a is divided into two tabs with the same polarity, the circuit block diagram of the corresponding first battery protection board 15 is as follows: Figure 3B As shown, the corresponding circuit block diagrams of the first protection circuit 153 and the second protection circuit 154 are as shown in FIG. Figure 4B shown. Figure 3B and Figure 3A The difference is that the tab 14a is divided into two tabs with the same polarity. Figure 4B and Figure 4A The difference is that the tab 14a is divided into two tabs with the same polarity.

[0176] See also Figure 5 , which is as follows Figure 5 The specific circuit structure diagram of the first protection board 15 in the battery module 100 is shown.

[0177] The first voltage sampling unit 1532 includes a first voltage detection resistor RV1 and a second voltage detection resistor RV2. The first voltage sampling resistor RV1 is electrically connected to the tab 14b of the first conductive path P1, and the second voltage sampling resistor RV2 is electrically connected to the tab 14c of the second conductive path P2. The first voltage sampling resistor RV1 and the second voltage sampling resistor RV2 are used to detect the voltage on the first conductive path P1 and the voltage on the second conductive path P2, respectively.

[0178] In this embodiment, because the two tabs 14b and 14c are directly electrically connected, the first voltage sampling resistor RV1 and the second voltage sampling resistor RV2 are connected in parallel. As a result, the first voltage sampling unit 1532 can collect the average voltage value of the first conductive path P1 and the second conductive path P2 and provide it to the first protection control unit 1531.

[0179] In other embodiments of the present application, the first voltage sampling unit 1532 may be provided with only the first voltage detection resistor RV1, so that the first voltage detection resistor RV1 detects and obtains the voltage of the first conductive path P1 as the voltage during charging or discharging of the battery cell 14. Alternatively, the first voltage sampling unit 1532 may be provided with only the second voltage detection resistor RV2, so that the second voltage detection resistor RV2 detects and obtains the voltage of the second conductive path P2 as the voltage during charging or discharging of the battery cell 14.

[0180] The first current sensing unit 1534 includes a first current sensing resistor RI1 and a second current sensing resistor RI2. The first current sensing resistor RI1 is electrically connected between the tab 14a and the first battery interface 151, and the second current sensing resistor RV2 is electrically connected between the tab 14a and the second battery interface 152. The first current sensing resistor RI1 and the second current sensing resistor RI2 are used to sense the current in the third conductive path P3 and the current in the fourth conductive path P3, respectively.

[0181] In this embodiment, the first battery interface 151 and the second battery interface 152 are directly electrically connected via the conductive wire, that is, the third conductive path P3 and the fourth conductive path P4 are short-circuited, so that the current flowing through the third conductive path P3 and the fourth conductive path P4 is substantially the same.

[0182] The second voltage sampling unit 1542 includes a third voltage detection resistor RV3 and a fourth voltage detection resistor RV4. The third voltage sampling resistor RV3 is electrically connected to the tab 14b of the first conductive path P1, and the fourth voltage sampling resistor RV4 is electrically connected to the tab 14c of the second conductive path P2. The third voltage sampling resistor RV3 and the fourth voltage sampling resistor RV4 are used to detect the voltage on the first conductive path P1 and the voltage on the second conductive path P2, respectively.

[0183] In this embodiment, because tab 14b and tab 14c of the two second tabs are directly electrically connected, the third voltage sampling resistor RV3 and the fourth voltage sampling resistor RV4 are connected in parallel. As a result, the second voltage sampling unit 1542 can collect the average voltage value of the first conductive path P1 and the second conductive path P2, and provide this average voltage value to the first protection control unit 1531.

[0184] In other embodiments of the present application, the second voltage sampling unit 1542 may be provided with only the third voltage detection resistor RV3, so that the third voltage detection resistor RV3 detects and obtains the voltage of the first conductive path P1 as the voltage during charging or discharging of the battery cell 14. Alternatively, the second voltage sampling unit 1542 may be provided with only the fourth voltage detection resistor RV4, so that the fourth voltage detection resistor RV4 detects and obtains the voltage of the second conductive path P2 as the voltage during charging or discharging of the battery cell 14.

[0185] like Figure 5 As shown, the first protection control unit 1531 includes a first voltage detection terminal PV1, a first current detection terminal PI1, a first charging control terminal CO1, and a first discharging control terminal DO1.

[0186] Specifically, the first voltage detection terminal PV1 is electrically connected to the first voltage detection resistor RV1 and the second voltage detection resistor RV2 for detecting voltage.

[0187] The first current detection terminal PI1 is electrically connected to the first current detection resistor RI1 and the second current detection resistor RI2 for detecting current.

[0188] The first charge control terminal CO1 and the first discharge control terminal DO1 are both electrically connected to the first switch S1 and are configured to output a protection signal to control the first switch S1 to be in an on state or an off state.

[0189] The first protection control unit 1531 determines whether the voltage and current detected by the first voltage detection terminal PV1 and the first current detection terminal PI1 exceed a threshold range. When the voltage or current exceeds the threshold range, the first protection control unit 1531 outputs a protection signal from the first charge control terminal CO1 and the first discharge control terminal DO1.

[0190] In this embodiment, the first switch S1 in the first switch unit 1533 includes a first control terminal SC1, a second control terminal SC2, a first conductive terminal SD1, and a second conductive terminal SD2.

[0191] The first control terminal SC1 is electrically connected to the first discharge control terminal DO1 , the second control terminal SC2 is electrically connected to the first charge control terminal CO1 , the first conductive terminal SD1 is electrically connected to the tab 14 a , and the second conductive terminal SD2 is electrically connected to the first battery interface 151 via the second switch unit 1543 .

[0192] The first protection control unit 1531 outputs protection signals from the first charge control terminal CO1 and the first discharge control terminal DO1, controlling the on and off states of the first switch S1 via the first control terminal SC1 and the second control terminal SC2. When the first switch S1 is turned on by the protection signal, the first conductive terminal SD1 and the second conductive terminal SD2 are electrically connected. When the first switch S1 is turned off by the protection signal, the first conductive terminal SD1 and the second conductive terminal SD2 are electrically disconnected.

[0193] In this embodiment, the first switch S1 is bidirectionally conductive. That is, for the third conductive path P3 in the first conductive loop, when the battery cell 14 is charging and current flows from the first battery tab 14a to the first battery interface 151, the first switch S1 can be turned on or off. Furthermore, when the battery cell 14 is discharging and current flows from the first battery interface 151 to the first battery tab 14a, the first switch S1 can be turned on or off.

[0194] At the same time, the first charge control terminal CO1 and the first discharge control terminal DO1 are both electrically connected to the second switch S2 for outputting a protection signal to control the second switch S2 to be in an on state or an off state.

[0195] The second switch S2 in the first switch unit 1533 includes a third control terminal SC3, a fourth control terminal SC4, a third conductive terminal SD3, and a fourth conductive terminal SD4.

[0196] The third control terminal SC3 is electrically connected to the first discharge control terminal DO1 , the fourth control terminal SC4 is electrically connected to the first charge control terminal CO1 , the third conductive terminal SD3 is electrically connected to the tab 14 a , and the fourth conductive terminal SD4 is electrically connected to the second battery interface 152 via the second switch unit 1543 .

[0197] The first protection control unit 1531 outputs protection signals from the first charge control terminal CO1 and the first discharge control terminal DO1, controlling the on and off states of the second switch S2 via the third control terminal SC3 and the fourth control terminal SC4. When the second switch S2 is turned on by the protection signal, the third conductive terminal SD3 and the fourth conductive terminal SD4 are electrically connected. When the second switch S2 is turned off by the protection signal, the third conductive terminal SD3 and the fourth conductive terminal SD4 are electrically disconnected.

[0198] In this embodiment, the second switch S2 is bidirectionally conductive. That is, for the fourth conductive path P4 in the first conductive loop, when the battery cell 14 is charging and current flows from the first battery tab 14a to the second battery interface 152, the second switch S2 can be turned on or off. Furthermore, when the battery cell 14 is discharging and current flows from the second battery interface 152 to the first battery tab 14a, the first switch S1 can be turned on or off.

[0199] The second protection control unit 1541 includes a second voltage detection terminal PV2 , a second current detection terminal PI2 , a second charge control terminal CO2 , and a second discharge control terminal DO2 .

[0200] Specifically, the second voltage detection terminal PV2 is electrically connected to the third voltage detection resistor RV3 and the fourth voltage detection resistor RV4 for detecting voltage.

[0201] The second current detection terminal PI2 is electrically connected to the first current detection resistor RI1 and the second current detection resistor RI2 for detecting current.

[0202] The second protection control unit 1541 determines whether the voltage and current detected by the second voltage detection terminal PV2 and the second current detection terminal PI2 exceed the threshold range. If the voltage or current exceeds the threshold range, the second charge control terminal CO2 and the second discharge control terminal DO2 output a protection signal.

[0203] The second charge control terminal CO2 and the second discharge control terminal DO2 are both electrically connected to the third switch S3 for outputting a protection signal to control the third switch S3 to be in an on state or an off state.

[0204] In this embodiment, the third switch S3 in the second switch unit 1543 includes a fifth control terminal SC5, a sixth control terminal SC6, a fifth conductive terminal SD5, and a sixth conductive terminal SD6.

[0205] The fifth control terminal SC5 is electrically connected to the second discharge control terminal DO2 , the sixth control terminal SC6 is electrically connected to the second charge control terminal CO2 , the fifth conductive terminal SD5 is electrically connected to the second conductive terminal SD2 of the first switch S1 , and the sixth conductive terminal SD5 is electrically connected to the first battery interface 151 .

[0206] The second protection control unit 1541 outputs a protection signal from the second charge control terminal CO2 and the second discharge control terminal DO2, controlling the on and off states of the third switch S3 via the fifth control terminal SC5 and the sixth control terminal SC6. When the third switch S3 is on in response to the protection signal, the fifth conductive terminal SD5 and the sixth conductive terminal SD6 are electrically connected. When the third switch S3 is off in response to the protection signal, the fifth conductive terminal SD5 and the sixth conductive terminal SD6 are electrically disconnected.

[0207] In this embodiment, the third switch S3 can be bidirectionally conductive, that is, for the third conductive path P3 in the first conductive loop, the third switch S3 can be turned on or off when the battery cell 14 is charging or discharging.

[0208] At the same time, the second charge control terminal CO2 and the second discharge control terminal DO2 are both electrically connected to the fourth switch S4 for outputting a protection signal to control the fourth switch S4 to be in an on state or an off state.

[0209] The fourth switch S4 in the second switch unit 1543 includes a seventh control terminal SC7, an eighth control terminal SC8, a seventh conducting terminal SD7, and an eighth conducting terminal SD8.

[0210] The seventh control terminal SC7 is electrically connected to the second discharge control terminal DO2 , the eighth control terminal SC8 is electrically connected to the second charge control terminal CO2 , the seventh conductive terminal SD7 is electrically connected to the fourth conductive terminal SD4 of the second switch S2 , and the eighth conductive terminal SD8 is electrically connected to the second battery interface 152 .

[0211] The second protection control unit 1541 outputs a protection signal from the second charge control terminal CO2 and the second discharge control terminal DO2, controlling the on and off states of the fourth switch S3 via the seventh control terminal SC7 and the eighth control terminal SC8. When the fourth switch S4 is turned on by the protection signal, the seventh conductive terminal SD7 and the eighth conductive terminal SD8 are electrically connected. When the fourth switch S4 is turned off by the protection signal, the seventh conductive terminal SD7 and the eighth conductive terminal SD8 are electrically disconnected.

[0212] In this embodiment, the fourth switch S4 can be bidirectionally conductive.

[0213] In this embodiment, the first battery protection board 15 may further include an anti-counterfeiting unit 155, which is electrically connected to the second conductive path P2 and is used to detect the cell voltage and cell current that the battery cell 14 can withstand, thereby preventing the battery cell 14 from being damaged due to mismatch between the battery cell voltage or the battery cell current.

[0214] Please combine Figure 1 and Figure 5 , specifically describing the working process of the first protection plate 15 in the battery module 100 performing charging (performing energy storage) and discharging (performing energy release) on the battery cell 14.

[0215] The process of charging the battery cell 14 is as follows:

[0216] The cell voltage and cell current outputted by the third circuit board 13 from the first conductive interface 131 and the second conductive interface 132 are transmitted to the first battery interface 151 and the second battery interface 152 of the first battery protection board 14 .

[0217] For the first conductive loop corresponding to the first battery interface 151 , the cell voltage and the cell current are transmitted from the first battery interface 151 to the tab 14 b through the first conductive path P1 .

[0218] The cell voltage charges the first capacitor C1 through the first voltage detection resistor RV1. When the charging voltage of the first capacitor C1 reaches the turn-on threshold voltage Vth of the first switch S1, the first protection control unit 1531 outputs a turn-on signal to the first charging control terminal CO1, thereby controlling the first switch S1 to be in the on state.

[0219] The cell voltage charges the second capacitor C2 through the third voltage detection resistor RV3. When the charging voltage of the second capacitor C2 reaches the conduction threshold voltage Vth of the third switch S3, the second protection control unit 1541 outputs a conduction signal to the second charging control terminal CO2, thereby controlling the third switch S3 to be in the on state.

[0220] Inside the battery cell 14 , the battery current is transmitted from the tab 14 b to the tab 14 a , and then from the tab 14 a through the first current detection resistor RI1 to the first conductive end SD1 of the first switch S1 , and then to the second conductive end SD2 .

[0221] Since the third switch S3 is also in the on state and the fifth conductive terminal SD5 of the third switch S3 is electrically connected to the second conductive terminal SD2, the cell current is transmitted to the first battery interface 151 through the second conductive terminal SD2, the fifth conductive terminal SD5 and the sixth conductive terminal SD6, thereby charging the battery cell 14 in the first conductive loop.

[0222] Similarly, for the second conductive loop corresponding to the second battery interface 152 , the cell voltage and the cell current are transmitted from the second battery interface 152 to the tab 14 c through the second conductive path P2 .

[0223] The cell voltage charges the first capacitor C1 through the second voltage detection resistor RV2. When the charging voltage of the first capacitor C1 reaches the conduction threshold voltage Vth of the second switch S2, the first protection control unit 1531 outputs a conduction signal to the first charging control terminal CO1, thereby controlling the second switch S2 to be in the on state.

[0224] The cell voltage charges the second capacitor C2 through the fourth voltage detection resistor RV4. When the charging voltage of the second capacitor C2 reaches the conduction threshold voltage Vth of the fourth switch S4, the second protection control unit 1541 outputs a conduction signal to the second charging control terminal CO2, thereby controlling the fourth switch S4 to be in the on state.

[0225] Inside the cell 14 , the cell current is transmitted from the tab 14 c to the tab 14 a , and then from the tab 14 a through the second current detection resistor RI2 to the third conductive terminal SD3 of the second switch S2 , and then to the fourth conductive terminal SD4 .

[0226] Since the fourth switch S4 is also in the on state, and the seventh conductive terminal SD7 of the fourth switch S4 is electrically connected to the third conductive terminal SD3, the battery cell current is transmitted to the second battery interface 152 through the third conductive terminal SD3, the seventh conductive terminal SD7 and the eighth conductive terminal SD8, thereby charging the battery cell 14 in the second conductive loop.

[0227] During charging, if the voltage or current on the first conductive path P1 or the second conductive path P2 exceeds the corresponding threshold range, that is, the voltage is overvoltage or undervoltage, or the current is overcurrent, the first protection control unit 1531 and the second protection control unit 1541 will perform protection for the battery cell 14. Here, the following values are used as an example: the undervoltage threshold corresponding to the first protection control unit 1531 is 2.4V, and the overvoltage threshold is 4.422V; the undervoltage threshold corresponding to the second protection control unit 1541 is 2.2V, and the overvoltage threshold is 4.45V.

[0228] Specifically, when the voltage on the first conductive path P1 or the second conductive path P1 is undervoltage, for example, when the voltage of the battery cell 14 is less than 2.4V, the first protection control unit 1531 outputs a protection signal to the first charging control terminal CO1, controlling the first switch S1 and the second switch S2 to be in the cut-off state (i.e., the disconnected state), thereby disconnecting the first conductive circuit and the second conductive circuit.

[0229] When the voltage on the first conductive path P1 or the second conductive path P1 is overvoltage, for example, when the voltage of the battery cell 14 is greater than 4.422V, the first protection control unit 1531 outputs a protection signal to the first charging control terminal CO1, controlling the first switch S1 and the second switch S2 to be in the off state, thereby disconnecting the first conductive circuit and the second conductive circuit.

[0230] If the first protection control unit 1531 fails, that is, the first protection unit 1531 cannot disconnect the first conductive circuit or the second conductive circuit in a timely and accurate manner when the battery cell 14 is overvoltage or undervoltage, then the second protection control voltage 1541 can disconnect the first conductive circuit or the second conductive circuit in a timely and accurate manner when the battery cell 14 is overvoltage or undervoltage.

[0231] For example, if the first protection unit 1531 fails, when the voltage of the battery cell 14 is less than 2.2V, the second protection control unit 1541 outputs a protection signal to the second charging control terminal CO2, controlling the third switch S3 and the fourth switch S4 to be in the off state, thereby disconnecting the first conductive loop and the second conductive loop.

[0232] If the first protection unit 1531 fails, when the voltage of the battery cell 14 is greater than 4.45V, the second protection control unit 1541 outputs a protection signal to the second charging control terminal CO2 to control the third switch S3 and the fourth switch S4 to be in the off state, thereby disconnecting the first conductive loop and the second conductive loop.

[0233] Similarly, when the third conductive path P3 or the fourth conductive path P4 is overcurrent or undercurrent, the working principles of the first protection control unit 1531 and the second protection control voltage 1541 are the same as those of the battery cell overvoltage and undervoltage, which will not be repeated here.

[0234] The process of discharging the battery cell 14 is as follows:

[0235] Inside the electrode 14, the cell voltage and the cell current flow from the electrode tab 14a to the electrode tab 14b and the electrode tab 14c respectively.

[0236] For the first conductive loop corresponding to the first battery interface 151, the cell voltage and cell current are transmitted from the tab 14b to the first battery interface 151 through the first conductive path P1, and then transmitted from the first battery interface 151 to the first tab 14a through the third switch S3 and the first switch S1, so that the battery cell 14 discharges to the first battery interface 151 in the first conductive loop.

[0237] Similarly, for the second conductive loop corresponding to the second battery interface 152, the cell voltage and cell current are transmitted from the tab 14c to the first battery interface 152 through the second conductive path P2, and then transmitted from the second battery interface 152 to the first tab 14a through the fourth switch S4 and the second switch S2, so that the battery cell 14 discharges to the second battery interface 152 in the second conductive loop.

[0238] During the discharge process, if the voltage and current on the first conductive path P1, the second conductive path P2, the third conductive path P3, or the fourth conductive path P4 exceed the corresponding threshold range, that is, the battery cell voltage is overvoltage or undervoltage, and the battery cell current is overcurrent or undercurrent, the first protection control unit 1531 and the second protection control unit 1541 perform protection on the battery cell 14. The protection process is similar to the charging process and will not be repeated here.

[0239] for Figure 1-Figure 5 The cell circuitry in the illustrated rechargeable battery module 10 includes at least two conductive loops for simultaneous charging and discharging for each cell 14, improving charging efficiency. Compared to cells with a single conductive loop, this reduces charging time by at least half. Furthermore, the current carried by each tab is also reduced, effectively reducing heat generation at each tab. This achieves high charging efficiency while simultaneously controlling heat generation at each tab.

[0240] For example, when the battery cell has only two tabs, for example, when charging with a current of 12A, taking the impedance of the protection plate as 20mOHM, the heat generated by the tabs and the protection plate is P=I^2R=144*20=2.88W.

[0241] However, for the battery cell 14 of this embodiment, since it includes three tabs and at least two conductive loops, each conductive loop carries a current of 6A after current is split. Taking a 20mOhm protection board impedance as an example, the heat generated by the tabs and protection board is P = 2 * I^2R = 2 * 36 * 20 = 1.44W. This reduces the overall heat generation by half (from 2.88W to 1.44W).

[0242] See also Figure 6 , which is a circuit block diagram of a battery module 100 in another embodiment of the present application. Figure 6 As shown, it is Figure 4A The structure of the battery module 100 shown is basically the same, the only difference is that the first battery protection board 15 only includes a first protection circuit 153, but does not include a second protection circuit 154. As mentioned above, the second protection circuit is to back up the first protection circuit. If the first protection circuit fails, the second protection circuit can perform voltage and current protection on the battery cell. Therefore, only one protection circuit can also implement the solution of the embodiment of the present application. Optionally, in order to further increase the reliability of protection, the number of protection circuits can also be increased. For example: the battery module 100 may include three, four or more protection circuits. The newly added protection circuit can refer to the structure and layout of the first protection circuit and the second protection circuit.

[0243] See also Figure 7 , which is a circuit block diagram of the charging module 30 in another embodiment of the present application.

[0244] In this embodiment, the charging module 30 and Figure 1 The circuits of the charging module 10 shown are basically the same, with the difference being that the first voltage conversion unit C1 is not provided on the first circuit board 11, and a second voltage conversion unit C2 is provided on the third circuit board 13, and the second voltage conversion unit C2 directly converts the first charging voltage into the battery cell voltage and provides it to the first battery interface 151 and the second battery interface 152, respectively. The second voltage conversion unit C2 in this embodiment has a higher voltage conversion efficiency than the voltage conversion units C1 and C2 in the charging module 10, for example, the conversion efficiency can be twice as high. For example: if the voltage conversion units C1 and C2 in the charging module 10 are both 2:1 Charger ICs, the second voltage conversion unit C2 in this embodiment can be a 4:1 Charger IC.

[0245] See also Figure 8 , which is a circuit block diagram of the battery module 400 in the charging module 40 in another embodiment of the present application.

[0246] like Figure 8 As shown, the battery module 400 and Figure 1 、 Figure 2A The circuits of the battery modules 100 shown are substantially the same, with the difference being that the tab 14 a in the battery cell 14 has a positive polarity, while the tabs 14 b and 14 c have a negative polarity.

[0247] See also Figure 9 , which is a circuit block diagram of the charging module 50 in another embodiment of the present application.

[0248] like Figure 9 As shown, the circuit block diagram of the battery module 500 in the charging module 50 is the same as Figure 1 The circuit of the battery module 100 in the charging module 10 shown is similar, except that the battery cell 14 in the battery module 500 includes four tabs and two first battery protection plates 15, and the first battery interface 151 and the second battery interface 152 are respectively arranged on opposite sides of the battery cell 14.

[0249] Specifically, the four tabs are tab 14a, tab 14b, tab 14c, and tab 14d. Tabs 14a and 14b are disposed on a first side 141 of the battery cell 14, while tabs 14c and 14d are disposed on a second side 142 of the battery cell 14. Tabs 14a and 14c have a first polarity, while tabs 14b and 14d have a second polarity. In this embodiment, the first polarity is negative, and the second polarity is positive.

[0250] In addition, in this embodiment, the first circuit board 11 does not include the first voltage conversion unit C1. Instead, the third circuit board 13 includes a second voltage conversion unit C2. The second voltage conversion unit C2 directly converts the first charging voltage into a cell voltage and provides it to the first battery interface 151 and the second battery interface 152, respectively. For example, the second voltage conversion unit C2 can be a 4:1 charger IC.

[0251] See also Figure 10 , Figure 10 FIG. 5 is a circuit diagram of the charging module 50. Figure 10 As shown, two first battery protection plates 15 are respectively disposed on the first side 141 and the second side 142 of the battery cell 14. That is, one first battery protection plate 15 is electrically connected to the tabs 14a and 14b, and the other first battery protection plate 15 is electrically connected to the tabs 14c and 14d.

[0252] For more details, please also refer to Figure 11 and Figure 12 , Figure 11 is a schematic diagram of the circuit structure of the battery module 500, Figure 12 FIG. 1 is a schematic diagram of the circuit structure of one of the first battery protection boards 15 .

[0253] like Figure 11 and Figure 12 As described above, the first battery protection board 15 located on the second side 142 of the battery cell 14 and the first battery interface 151 are electrically connected to the tabs 14a and 14b, and form a first conductive loop; the first battery protection board 15 located on the first side 141 of the battery cell 14 and the second battery interface 152 are electrically connected to the tabs 14c and 14d, and form a second conductive loop.

[0254] like Figure 12 As shown, the first battery protection board 15 includes two protection circuits 153 and 154. The protection circuits 153 and 154 provide voltage and current protection for the conductive loop. For the specific principles, please refer to the description in the above embodiment. Figure 12 In the illustrated embodiment, both protection circuits 153 and 154 are electrically connected to the first battery interface 151. In another battery protection board, both protection circuits are electrically connected to the second battery interface 151. It will be appreciated that the two protection circuits 153 and 154 serve as backup for each other, and thus, a single battery protection board may be provided with only one protection circuit, or with multiple protection circuits.

[0255] See also Figure 13 , which is a circuit block diagram of the charging module 60 in another embodiment of the present application.

[0256] like Figure 13 As shown, the battery module 600 included in the charging module 60 is Figure 1 The circuitry of the battery module 100 shown in the charging module 10 is similar, with the difference being that the battery cell 14 in the battery module 600 includes six tabs, two battery protection boards, and four battery connectors. In other words, the battery module 600 has three more tabs, one more battery protection board, and two more battery connectors than the battery module 100. It is understood that the battery module 600 is equivalent to two three-tab batteries, but with only one battery cell.

[0257] Specifically, the battery module 600 included in the charging module 60 is Figures 1-2A Compared with the battery module 100 shown in FIG. 1 , the battery module 100 includes more components. Figure 13As shown, the battery module 600 further includes a second battery protection board 16, a third battery interface 156, and a fourth battery interface 157 disposed on the first side 141 of the battery cell 14. The circuit structure, connection method, and operating principle of the second battery protection board 16 are identical to those of the first battery protection board 15.

[0258] In addition, the charging module 60 has an additional voltage conversion unit C3 on the circuit board compared to the charging module 10. Figure 13 As shown, the first circuit board 11 includes a third voltage conversion unit C3. The third battery interface 156 and the fourth battery interface 157 are respectively electrically connected to the third voltage conversion unit C3 in the first circuit board 11 to transmit voltage and current to the battery cell 14. The third voltage conversion unit C3 may be the same as the second voltage conversion unit C2 on the third circuit board. It should be noted that, in other embodiments, the third voltage conversion unit C3 or the second voltage conversion unit C2 may be replaced by two or more conversion units with low conversion efficiency. For example: a 4:1 charger IC (C3 or C2) may be replaced by two or three 2:1 charger ICs. For example Figure 1 The embodiment shown uses three 2:1 charger ICs to achieve double voltage reduction. Figure 7 The embodiment shown uses a 4:1 charger IC to achieve voltage reduction. In the charging module 60, the external voltage and current are received through the first transmission interface 111, and then divided and transmitted to the third voltage conversion unit C3 in the first circuit board 11 and the second voltage conversion unit C2 in the third circuit board 13. The subsequent processing flow can be referred to the above three-electrode embodiment ( Figures 1-8 The description in the embodiment shown).

[0259] See also Figure 14A , which is Figure 13 The schematic diagram of the structure of the battery module 600 in the charging module 60 is shown. Figure 14A As shown, in addition to the tabs 14a, 14b, and 14c disposed on the second side 142, the battery cell 14 also includes tabs 14d, 14e, and 14f disposed on the first side 141. Tabs 14d, 14f, and 14b have the same polarity as tab 14c, and tab 14e has the same polarity as tab 14a. Tabs 14e and 14f are spaced a predetermined distance apart and disposed on the left and right sides of tab 14d. The structure and layout of tabs 14d, 14e, and 14f can refer to the tabs 14a, 14b, and 14c in the aforementioned embodiment.

[0260] See also Figure 15 , which is as follows Figure 13The circuit structure diagram of the battery module 600 in the charging module 60 is shown in FIG. Figure 15 As shown, the second battery protection board 16 is disposed on the first side 141 of the battery cell 14 and is used to receive the battery cell voltage and battery cell current from the first circuit board 11. It is also electrically connected to the tabs 14d, 14e, and 14f via the third battery interface 156 and the fourth battery interface 157. Since the circuit structure, connection method, and operating principle of the second battery protection board 16 are the same as those of the first battery board 15, the specific connection method will not be repeated in this embodiment.

[0261] It should be noted that in the four- or six-tab implementations, charging can be performed using both ends of the cell, meaning all four or six tabs are used. However, discharging can be performed using only the tabs and circuitry at one end of the cell. For example, with four tabs, discharging can be performed using only two tabs (e.g., one positive and one negative tab connected to the third circuit board). With six tabs, discharging can also be performed using only the circuit formed by some of the tabs. Of course, all tabs can also be used.

[0262] like Figure 14B As shown, another embodiment of the present application also provides a battery module with five tabs (which can be called a five-tab battery module). Figure 14A Compared with the six-electrode battery module shown in the figure, the five-electrode battery module also includes two battery protection boards and four battery interfaces; the difference is that the battery cell of the five-electrode battery module includes three tabs on one side and two tabs on the other side. The structure of the three tabs and the corresponding circuit structure can be referred to in the above Figures 1-8 The structure of the two tabs and the corresponding circuit structure can be seen in the description of the embodiment shown in FIG. Figures 9-12 The description of the two tabs in the four-tab structure shown. It can be understood that a battery module with six tabs can be equivalent to two three-tab batteries, but with only one battery cell. A battery module with four tabs can be equivalent to two two-tab batteries, but with only one battery cell. A battery module with five tabs can be equivalent to one three-tab battery and one two-tab battery, but with only one battery cell.

[0263] In a five-tab battery module, three tabs can be arranged on one side of the battery cell body, and the other two tabs can be arranged on the other side of the battery cell body. These two sides can be opposite, adjacent, or spaced apart.

[0264] In another embodiment of the present application, Figures 9-12Based on the four-tab battery module of the illustrated embodiment, the battery module can further include two more tabs, i.e., provide another six-tab battery module. The six-tab battery module can include a battery cell body, six tabs, three battery protection plates, and six battery interfaces, which is equivalent to three two-tab battery modules. The positions of the six tabs are not limited, and two tabs can be located on one side of the battery cell body, i.e., tabs are provided on three sides of the battery cell body, with two tabs of different polarities provided on each side. Of the six tabs, three tabs have a first polarity, and the other three tabs have a second polarity. The three tabs of the same polarity are provided on the same pole piece.

[0265] The following is the test data of charging the existing two-electrode battery cell structure and the charging module provided in each embodiment of the present application.

[0266] The test results of the charging module with only two tabs (existing technology) are as follows:

[0267]

[0268] for Figure 1 The test results of the charging module 100 (three tabs) in the embodiment shown are as follows:

[0269]

[0270] for Figure 9 The test results of the charging module 500 (four tabs) in the embodiment shown are as follows:

[0271]

[0272] for Figure 13 The test results of the charging module 600 (six tabs) in the embodiment shown are as follows:

[0273]

[0274] From the above tests we can see that:

[0275] When the first charging current (externally input charging current) is 8A, for an existing battery cell with only two tabs, the total power consumption is 5.195W. However, the total power consumption of the charging module with three tabs in the embodiment of the present application is only 2.615W, and the total power consumption of the charging module with four tabs in the embodiment of the present application is only 2.292W.

[0276] When the first charging current is 12A, the total power consumption of the charging module including three pole ears in the embodiment of the present application is 4.799W, the total power consumption of the charging module including four pole ears in the embodiment of the present application is 4.073W, and the total power consumption of the charging module including six pole ears in the embodiment of the present application is 2.883W.

[0277] Compared to the prior art, the power consumption of the charging modules in the various embodiments of the present application is significantly reduced, while the charging rate is significantly improved. Thus, while meeting power consumption requirements, the charging modules provided in the various embodiments of the present application are capable of high-power, fast charging. For example, if the overall power consumption requirement is approximately 5W-6W, the three-electrode solution in the embodiments of the present application can support a current of approximately 12-13A, or a charging power of approximately 60-65W (12A*5V=60W, 13A*5V=65W) (charging voltage: 5V); the four-electrode solution can support a current of approximately 14-16A, or a charging power of approximately 70-90W; and the six-electrode solution can support a current of approximately 20A, or a charging power of approximately 100W. Among the solutions provided in the embodiments of the present application, the six-electrode solution has lower power consumption than the four-electrode solution, which in turn has lower power consumption than the three-electrode solution. In other words, the six-pole ear solution can support higher-power charging than the four-pole ear solution, and the four-pole ear solution can support higher-power charging than the three-pole ear solution.

[0278] The structure of the battery cell 14 in the embodiment of the present application is introduced below.

[0279] A battery cell may include two pole pieces. Each pole piece includes an active area (AA) and may further include a peripheral area (i.e., an inactive area, NA). The active area AA is coated with a conductive material. The conductive materials coated in the active areas of the two pole pieces cooperate to perform the storage and release of electrical energy. The two pole pieces have different polarities. Each pole piece has one or more tabs. The two pole pieces are wound together to form a battery cell. The tabs on the pole pieces are the tabs of the battery cell. A corresponding number of tabs are provided on the pole pieces according to the number of tabs required for the battery cell.

[0280] See also Figure 16A , which is a schematic diagram of the exploded structure of a battery cell 14 with three tabs in one embodiment of the present application.

[0281] like Figure 16A As shown, the battery cell 14 includes two pole pieces with different polarities, pole piece 144 and pole piece 145. For example, pole piece 144 has a first polarity and pole piece 145 has a second polarity; or pole piece 144 has a second polarity and pole piece 145 has a first polarity.

[0282] The pole piece 144 includes a first active area AA1 and two first peripheral areas NA1 .

[0283] The first active area AA1 is coated with a first conductive material M1. The two first peripheral areas NA1 are located at two opposite sides of the first active area AA1. A tab is provided in each first peripheral area NA1. Figure 16A Tabs 14b and 14c are shown.

[0284] The pole piece 145 includes a second active area AA2 and two second peripheral areas NA2 . Alternatively, in other embodiments, the pole piece 145 may include only one peripheral area NA2 (not shown in the figure).

[0285] The second active area AA2 is coated with a second conductive material M2. Two second peripheral areas NA2 are located on two opposite sides of the second active area AA1. One of the second peripheral areas NA2 is provided with a tab, such as tab 14a.

[0286] The first conductive material M1 and the second conductive material M2 cooperate to store and release electrical energy.

[0287] See also Figure 17 , which is Figure 16A The top view of the battery cell 14 is shown. Figure 17 As shown, the pole piece 144 and the pole piece 145 are wound together, wherein the pole tab 14a and the pole tab 14c are adjacently arranged inside the winding structure, and the pole tab 14c is located at the outer edge of the winding structure as the pole pieces 144 and 145 are wound.

[0288] See also Figure 18 , which is Figure 16A The front structure diagram of the battery cell 14 is shown. Two tabs 14b and 14c are located on the left and right sides of the tab 14a.

[0289] In various embodiments of the present application, the tab 14b and the tab 14c are identical. Tabs 14b and 14c are merely distinguishable identifiers. That is, in various embodiments of the present application, tabs 14b and 14c may be interchanged.

[0290] Figure 16A and Figure 17 This is only a schematic diagram of a three-tab battery cell structure. In other embodiments, the three-tab battery cell may also have other structures. Among them, the two tabs in the pole piece 144 may be located in other different positions.

[0291] For example, the two tabs may be located in the peripheral areas at both ends of the pole piece 144, such as Figure 16A shown.

[0292] Alternatively, one of the two tabs may be located in the peripheral area of one end of the pole piece 144, and the other may be located in the effective area AA of the pole piece 144. Figure 19 As shown, the tab 14 c is located in a peripheral area NA1 of the pole piece 144 (the left end or the right end of the pole piece 144 ), and the tab 14 c is located in a first effective area AA1 of the pole piece 144 .

[0293] Or, as Figure 16B As shown, the two tabs 14b and 14c may also be located in the first effective area of the pole piece 144. When the two tabs are located in the effective area of the pole piece, the two tabs may be connected or not. Figure 16C As shown, one end of the pole tab 14b disposed on the pole piece is connected to one end of the pole tab 14c disposed on the pole piece. From the appearance, the two pole tabs are separated, but inside the pole piece, the two pole tabs may be connected.

[0294] There are two ways to provide a tab in the active area AA of the electrode sheet 144. One approach is to remove some of the conductive material from a predetermined location after coating the active area AA1 with conductive material, and then electrically position the tab at the predetermined location, for example, by welding the tab to the electrode sheet. The other approach is to electrically connect the tab to the electrode sheet, and then apply conductive material to the area other than the tab location.

[0295] Figure 20 for Figure 19 The top view of the battery cell 14 is shown. Figure 20 As shown, the pole piece 144 and the pole piece 145 are wound together, wherein the pole tab 14a and the pole tab 14c are adjacently arranged inside the winding structure, and another second pole tab 14b is located at other positions of the winding structure as the pole pieces 144 and 145 are wound. Figure 19 、 Figure 20 The front structure of the battery cell 14 shown can be seen in Figure 18 .

[0296] Alternatively, the tab 14 b and the tab 14 c may both be located in the active area AA. The tab 14 b and the tab 14 c are both located in the active area AA1 of the electrode sheet 144 .

[0297] Alternatively, the tabs 14a in the pole piece 145 and the tabs 14c in the tabs 144 may also be located in the active area AA. Figure 21 As shown, the pole tab 14 a is located in the active area AA2 of the pole piece 145 , and the pole tab 14 c is located in the active area AA1 of the pole piece 144 .

[0298] In other embodiments, the tabs in the pole piece 145 may also be located at different positions of the pole piece. The tabs may be located in the peripheral area of either end of the pole piece 145, such as Figure 16A Alternatively, the tabs may be located in the active area of the pole piece 145, as shown in FIG. Figure 21 As shown, the pole tab 14 a is located in the second active area AA2 of the pole piece 145 .

[0299] Figure 22 for Figure 21 The top view of the battery cell 14 is shown. Figure 22 As shown, the pole piece 144 and the pole piece 145 are wound together, wherein the pole tab 14a and the pole tab 14c are adjacently arranged inside the winding structure, and the pole tab 14b is located at other positions of the winding structure as the pole pieces 144 and the pole pieces 145 are wound. Figure 21 、 Figure 22 The front structure of the battery cell 14 shown can be seen in Figure 18 .

[0300] In the embodiment of the present application, in order to form a battery cell with three tabs, one tab can be set on one pole piece and two tabs can be set on another pole piece. Figure 23 As shown, a pole tab 14 a may be provided on the pole piece 144 , and pole tabs 14 b and 14 c may be provided on the pole piece 145 .

[0301] Optionally, the multiple tabs provided on the pole piece may face different directions. Figures 16A-22 In each of the illustrated embodiments, the tabs 14a, 14b, and 14c all face the same direction, such as upward as shown in the figure. In other embodiments, the three tabs may face any different directions.

[0302] For example, any two of the three tabs can face the same direction, while the other can face a different direction. Figure 23 As shown, the tab 14b and the tab 14a face the same direction, such as upward, and the tab 14c faces a different direction from the tab 14b, such as downward. It is understandable that the tabs 14b and the tab 14a may both face downward, while the tab 14c faces upward. Figure 24 for Figure 23 A top view of the battery cell 14 is shown. Figure 25 for Figure 24 A schematic diagram of the front structure of the battery cell 14 is shown.

[0303] above Figures 16A-25 In the embodiment shown, the tabs on the electrode sheets correspond one to one with the tabs on the battery cell. That is, if the battery cell has three tabs, then there are three tabs on the two electrode sheets in total. In other embodiments, multiple tabs on the electrode sheets may correspond to one tab on the battery cell. Figure 26As shown, electrode sheet 144 may include multiple tabs 14-1 (also called sub-tabs) and multiple tabs 14-2. When electrode sheet 144 and electrode sheet 145 are wound together, multiple tabs 14-1 overlap and electrically connect to form a tab 14b of the battery cell, and multiple tabs 14-2 overlap and connect to form a tab 14c of the battery cell. Optionally, electrode sheet 145 may also include multiple tabs 14-3. When electrode sheet 144 and electrode sheet 145 are wound together, multiple tabs 14-3 overlap and electrically connect to form a tab 14a of the battery cell. The present embodiment does not limit the number and position of tabs (sub-tabs) in the electrode sheet, as long as the desired number and position of tabs can be formed after the two electrode sheets are wound. Persons skilled in the art can determine the number and position of tabs based on circuit design and layout. When a electrode sheet includes multiple tabs, these tabs may be located in the active area of the electrode sheet, in the peripheral area of the electrode sheet, or partially in the active area and partially in the peripheral area. Figure 27 for Figure 26 A schematic diagram of the three-dimensional structure of the battery cell 14 is shown. Figure 28 for Figure 27 A left side view of the battery cell 14 is shown. Figure 26-Figure 28 The main view of the cell shown can be seen in Figure 18 .

[0304] In the aforementioned embodiment, the battery cell has a wound structure, including two pole pieces wound together. Optionally, the internal structure of the battery cell may also include other pole piece structures, such as a laminated structure. For example, the battery cell may include a plurality of pole pieces 144 having a first polarity and a plurality of pole pieces 145 having a second polarity. These pole pieces 144 and pole pieces 145 are stacked together to form a battery cell. When stacked, the pole pieces 144 and pole pieces 145 may be spaced apart, that is, one pole piece 145 is stacked between two pole pieces 144, and one pole piece 144 is stacked between two pole pieces 145.

[0305] In the embodiment of the present application, in order to form a battery cell with three tabs, two tabs can be set on any side of one pole piece, and one tab can be set on any side of another pole piece. Figure 29 FIG. 1 is a schematic diagram of the exploded structure of a battery cell 14 in one embodiment of the present application. Two sub-tabs 14b-1 and a tab 14c-1 may be provided on the first side of each electrode piece 144, and a tab 14a-1 may be provided on each electrode piece 145. All electrode pieces 144 and all electrode pieces 145 are stacked together, and the sub-tabs 14b-1 on all electrode pieces 144 are electrically connected (e.g., welded together) to form the tab 14b on the battery cell. The sub-tabs 14c-1 on all electrode pieces 144 are electrically connected to form the tab 14c on the battery cell. The sub-tabs 14a-1 on all electrode pieces 145 are electrically connected to form the tab 14a on the battery cell.

[0306] Optionally, the multiple sub-electrode tabs provided on the electrode piece may face different directions, such as Figure 29 As shown, the sub-electrode tab 14b-1, the sub-electrode tab 14c-1, and the sub-electrode tab 14a-1 are all facing upwards. In other embodiments, the three tabs can face any different directions. For example, the sub-electrode tab 14a-1 can face right or left.

[0307] Figure 29 The schematic diagram of the three-dimensional structure of the battery cell after the electrode piece 144 and the electrode piece 145 are superimposed can be seen in Figure 27 .

[0308] Optionally, the multiple sub-electrode tabs provided on the same electrode piece may face different directions. For example, the sub-electrode tab 14b-1 and the sub-electrode tab 14c-1 in the electrode piece 144 may face different directions. Figure 30 As shown, the sub-electrode tab 14b-1 and the sub-electrode piece 14a-1 face upward, and the sub-electrode tab 14c-1 faces leftward. Figure 31 for Figure 30 A schematic diagram of the three-dimensional structure of the battery cell 14 is shown. Figure 32 for Figure 31 A left side view of the battery cell 14 is shown. Figure 33 for Figure 31 A front view of the battery cell.

[0309] In one embodiment of the present application, Figure 34 As shown in FIG, when the battery cell has six tabs, there are also six tabs on the two pole pieces. Figure 34 As shown, four tabs of the same polarity are provided on the pole piece 144, and two tabs of the same polarity are provided on the pole piece 145. In other embodiments, the multiple tabs on the pole piece may correspond to one tab of the battery cell. Figure 35 As shown, the electrode piece 144 may include multiple sub-electrode tabs 14-1, multiple sub-electrode tabs 14-2, multiple sub-electrode tabs 14-3, and multiple sub-electrode tabs 14-4. When the electrode piece 144 and the electrode piece 145 are wound together, the multiple sub-electrode tabs 14-1 overlap and are electrically connected to form a electrode tab 14b of the battery cell, the multiple sub-electrode tabs 14-2 overlap and are electrically connected to form a electrode tab 14c of the battery cell, the multiple sub-electrode tabs 14-3 overlap and are electrically connected to form a electrode tab 14e of the battery cell, and the multiple sub-electrode tabs 14-4 overlap to form a electrode tab 14f of the battery cell.

[0310] Optionally, the electrode piece 145 may also include multiple sub-electrode tabs 14-5. When the electrode pieces 144 and 145 are wound together, the multiple sub-electrode tabs 14-5 overlap and are electrically connected to form a cell electrode tab 14a, and the multiple sub-electrode tabs 14-6 overlap and are electrically connected to form a cell electrode tab 14d.

[0311] The embodiments of the present application do not limit the number and position of the tabs in the electrode sheet, as long as the required number and position of tabs can be formed after the two electrode sheets are wound. Those skilled in the art can set the number and position of tabs based on circuit design and layout. When a pole sheet includes multiple tabs, these tabs can be set in the active area of the pole sheet, in the peripheral area of the pole sheet, or partially in the active area and partially in the peripheral area. Figure 36 for Figure 35 A front view of the battery cell 14 is shown.

[0312] Optionally, in the battery cell 14, all tabs of the same polarity are electrically connected to each other inside the battery cell body, so that the tabs of the same polarity have the same voltage. Figure 37 As shown, in the pole piece 144, two pole tabs 14b and pole tabs 14d arranged along different sides and in opposite directions are directly electrically connected in the pole piece 144, or the two pole tabs 14b and pole tabs 14d are directly integrally formed in the pole piece 144. In the pole piece 145, two pole tabs 14a and pole tabs 14c arranged along different sides and in opposite directions are directly electrically connected in the pole piece 145, or the two pole tabs 14a and pole tabs 14c are integrally formed in the pole piece 145. Figure 38 for Figure 37 The front structure diagram of the battery cell 14 is shown, and Figure 37 and Figure 38 Shown is a schematic diagram of the quadrupole structure.

[0313] It should be noted that when the tab is located in the effective area AA of the pole piece, the pole piece may not be provided with a peripheral area, or the peripheral area may be provided only at one end.

[0314] It should be noted that in each embodiment of the present application, the tab and the pole piece can be two components connected together by welding. Alternatively, the tab and the pole piece can be integrated, and the tabs can be cut out of the pole piece according to the required position and quantity.

[0315] It should be noted that, in the multi-tab battery module provided in each embodiment of the present application, the multiple tabs can be arranged at any position on the battery cell body. Figure 39 As shown in FIG, some possible structures of three-electrode battery modules provided in the embodiments of the present application are shown. Figure 40 As shown in FIG, some possible structures of quad-tab battery modules provided in the embodiments of the present application are shown. Figure 41 As shown in FIG, some possible structures of five-electrode battery modules provided in the embodiments of the present application are shown. Figure 42 As shown in FIG. 1 , some possible structures of six-electrode battery modules provided in embodiments of the present application are shown.

[0316] It should be noted that the battery modules provided in the embodiments of the present application do not limit the structure of the battery cell body. The battery cell body can be a conventional shape, such as a rectangle or a square, or a shape similar to a rectangle or a square. Alternatively, the battery cell body can also be a special shape. For example: Figure 43 As shown, the battery cell body can be non-penetrating. A non-penetrating battery cell body can be: There is an impenetrable area A on the battery cell body or edge (the shape of the area is not limited); the aluminum-plastic film of the battery at the corresponding position of area A is not provided with a through hole, but the positive electrode, negative electrode, and separator can be provided with a through hole. When the battery module is installed in an electronic device, the components of the electronic device can extend into the area A in whole or in part, but cannot pass through the battery cell body. Or, as Figure 44 As shown, the battery cell body can be a through-type. A through-type battery cell body can include: a through-hole (region B) provided in the battery cell body or its edges; through-holes are also provided in the aluminum-plastic film, positive electrode, negative electrode, and separator at corresponding locations in region B. When the battery module is installed in an electronic device, the components of the electronic device can pass through region B of the battery. The main materials of the battery include the aluminum-plastic film, positive electrode, negative electrode, and separator.

[0317] In addition, in the electronic modules provided in the various embodiments of the present application, the shape of the battery cell body is not limited, and the battery cell body can be of various shapes and have different tab distributions. Figure 45 As shown in FIG, some possible structures of three-electrode battery modules provided in the embodiments of the present application are shown. Figure 46 As shown in FIG, some possible structures of quad-tab battery modules provided in the embodiments of the present application are shown. Figure 47 As shown in FIG, some possible structures of five-electrode battery modules provided in the embodiments of the present application are shown. Figure 48 As shown in FIG. 1 , some possible structures of six-electrode battery modules provided in embodiments of the present application are shown.

[0318] An embodiment of the present application also provides an electronic device. This electronic device includes a functional circuit and the charging module described in each of the aforementioned embodiments. The charging module is used to provide operating power to the functional circuit. This electronic device can be any rechargeable portable device, such as a mobile phone, a laptop computer, a wearable device (such as a smartwatch or wristband), a tablet computer, and the like. When the electronic device is a mobile phone, the charging module receives and stores electrical energy from an external power source; the battery module provides power to the other components of the mobile phone.

[0319] The above is a detailed introduction to a charging circuit provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the ideas of the present application, there may be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery module, characterized in that: Including battery cells; The battery cell comprises a battery cell body, a first tab, a second tab and a third tab; The first tab, the second tab and the third tab are electrically connected to the battery cell body respectively; The first tab and the third tab have a first polarity, and the second tab has a second polarity; The second tab cooperates with the first tab to input voltage and current to the battery cell body, and the second tab cooperates with the third tab to input voltage and current to the battery cell body; or The second pole tab cooperates with the first pole tab to output voltage and current from the battery cell body, and the second pole tab cooperates with the third pole tab to output voltage and current from the battery cell body; the first polarity is positive, and the second polarity is negative; or, the first polarity is negative, and the second polarity is positive.

2. The battery module according to claim 1, wherein: It also includes a first battery protection board, which includes a first protection circuit, a second protection circuit, a first battery interface and a second battery interface; the first battery interface and the second battery interface are used to electrically connect to components outside the battery module.

3. The battery module according to claim 2, characterized in that: The first battery interface is electrically connected to the first tab and the second tab respectively through the first protection circuit, and the first battery interface, the first tab, the battery cell body, the second tab and the first protection circuit form a third conductive loop; The second battery interface is electrically connected to the second tab and the third tab respectively through the second protection circuit, and the second battery interface, the second tab, the battery cell body, the third tab and the second protection circuit form a fourth conductive loop; The first protection circuit and the second protection circuit are used to detect the voltage and current of the third conductive circuit and the fourth conductive circuit. When the voltage or the current exceeds a threshold range, the first protection circuit disconnects the third conductive circuit and / or the second protection circuit disconnects the fourth conductive circuit.

4. The battery module according to claim 2, wherein: The first protection circuit is electrically connected between the first tab, the second tab, and the first battery interface; The second protection circuit is electrically connected between the first tab, the second tab, the third tab and the first battery interface; The first protection circuit and the second protection circuit are used to detect the voltage and current between the first electrode, the second electrode, the third electrode and the first battery interface. When the voltage or the current exceeds a threshold range, the first protection circuit and / or the second protection circuit is disconnected.

5. The battery module according to claim 2, wherein: The first protection circuit is electrically connected between the first tab, the second tab, the third tab and the first battery interface; and The first protection circuit is electrically connected between the first tab, the second tab, the third tab and the second battery interface; and The second protection circuit is electrically connected between the first tab, the second tab, the third tab and the first battery interface; and The second protection circuit is electrically connected between the first tab, the second tab, the third tab and the second battery interface; The first protection circuit and the second protection circuit are used to detect the voltage and current between the first electrode, the second electrode, the third electrode and the first battery interface, the second battery interface. When the voltage or the current exceeds a threshold range, the first protection circuit and / or the second protection circuit is disconnected.

6. The battery module according to claim 2, characterized in that: The first battery protection board also includes a third protection circuit, The first protection circuit is electrically connected between the first tab and the second tab; The second protection circuit is electrically connected between the first tab, the second tab, and the first battery interface; The third protection circuit is electrically connected between the second tab, the third tab and the second battery interface; The first protection circuit, the second protection circuit and the third protection circuit are used to detect the voltage and current between the first electrode, the second electrode, the third electrode and the first battery interface, the second battery interface. When the voltage or the current exceeds a threshold range, the first protection circuit and / or the second protection circuit and / or the third protection circuit are disconnected.

7. The battery module according to claim 2, characterized in that: The first battery protection board further includes a third protection circuit and a fourth protection circuit; The first protection circuit and the second protection circuit are electrically connected between the first tab, the second tab and the first battery interface respectively; The third protection circuit and the fourth protection circuit are electrically connected between the second tab, the third tab and the second battery interface respectively; The first protection circuit, the second protection circuit, the third protection circuit and the fourth protection circuit are used to detect the voltage and current between the first electrode, the second electrode, the third electrode and the first battery interface, the second battery interface. When the voltage or the current exceeds a threshold range, the first protection circuit and / or the second protection circuit and / or the third protection circuit and / or the fourth protection circuit are disconnected.

8. The battery module according to claim 1, wherein: Also included is a first battery protection board, the first battery protection board including a first protection circuit, a first battery interface and a second battery interface; the first battery interface and the second battery interface are used to electrically connect to components outside the battery module; The first battery interface is electrically connected to the second tab and the first tab respectively through the first protection circuit, and the first battery interface, the first tab, the battery cell body, the second tab and the first protection circuit form a first conductive loop; The second battery interface is electrically connected to the second tab and the third tab respectively through the first protection circuit, and the second battery interface, the third tab, the battery cell body, the second tab and the first protection circuit form a second conductive loop; The first protection circuit is used to detect the voltage and current of the first conductive loop and the second conductive loop. When the voltage or the current exceeds a threshold range, the first protection circuit disconnects the first conductive loop and the second conductive loop.

9. The battery module according to claim 8, characterized in that: The first protection circuit includes a first protection control unit, a first sampling unit and a first switching unit; The first protection control unit is electrically connected to the first conductive loop and the second conductive loop respectively, and the first protection control unit detects the voltage of the first conductive loop and the second conductive loop; The first sampling unit is electrically connected to the second tab, the first protection control unit, and the first switch unit, respectively, and the first protection control unit detects the current of the first conductive loop and the second conductive loop through the first sampling unit; The first switch unit is electrically connected to the first protection control unit, the first sampling unit, the first battery interface, and the second battery interface respectively; The first protection control unit is configured to control the switch unit to disconnect when it is determined that the voltage or current of the first conductive circuit or the second conductive circuit exceeds a first threshold range, so as to disconnect the first conductive circuit and the second conductive circuit.

10. The battery module according to claim 9, characterized in that: The first switch unit includes a first switch and a second switch, the first switch is located in the first conductive loop, and the second switch is located in the second conductive loop.

11. The battery module according to claim 9, characterized in that: The first protection circuit further includes a second protection control unit and a second switch unit. The second protection control unit is electrically connected to the first conductive loop and the second conductive loop respectively, and the second protection control unit detects the voltage of the first conductive loop and the second conductive loop; The second protection control unit is electrically connected to the first sampling unit, and is configured to detect the currents of the first conductive loop and the second conductive loop through the first sampling unit; The second switch unit is electrically connected to the second protection control unit, the first switch unit, the first battery interface, and the second battery interface respectively; The second protection control unit is configured to control the second switch unit to disconnect when it is determined that the voltage or current of the first conductive circuit or the second conductive circuit exceeds a second threshold range, so as to disconnect the first conductive circuit and the second conductive circuit.

12. The battery module according to claim 11, characterized in that: The first threshold range is the same as the second threshold range, or the first threshold range is smaller than or larger than the second threshold range.

13. The battery module according to claim 11, characterized in that: The second switch unit includes a third switch and a fourth switch. The third switch is located in the first conductive loop, and the fourth switch is located in the second conductive loop.

14. The battery module according to claim 3, wherein: The first protection circuit includes a first protection control unit, a first sampling unit and a first switch unit; wherein The first protection control unit is electrically connected to the third conductive loop, and the first protection control unit detects the voltage of the third conductive loop; The first sampling unit is electrically connected to the second tab, the first protection control unit, and the first switch unit respectively, and the first protection control unit detects the current of the third conductive loop through the first sampling unit; The first switch unit is electrically connected to the first protection control unit, the first sampling unit, and the first battery interface respectively; The first protection control unit is configured to control the switch unit to disconnect when it is determined that the voltage or current of the third conductive circuit exceeds a third threshold range, so as to disconnect the third conductive circuit; The second protection circuit includes a third protection control unit, a third sampling unit and a third switch unit; in The second protection control unit is electrically connected to the fourth conductive loop, and the third protection control unit detects the voltage of the fourth conductive loop; The third sampling unit is electrically connected to the second tab, the third protection control unit, and the third switch unit respectively. The third protection control unit detects the current of the fourth conductive loop through the third sampling unit.

15. The battery module according to claim 3, wherein: The first protection circuit includes a first protection control unit, a first sampling unit and a first switch unit; wherein The first sampling unit is electrically connected to the second tab, the first protection control unit, and the first switch unit respectively, and the first protection control unit detects the current of the third conductive loop through the first sampling unit; The first switch unit is electrically connected to the first protection control unit, the first sampling unit, and the first battery interface respectively; The first protection control unit is configured to control the switch unit to disconnect when it determines that the voltage or current passing therethrough exceeds a fourth threshold range; The second protection circuit includes a third protection control unit, a third sampling unit and a third switch unit; wherein The third sampling unit is electrically connected to the second tab, the third protection control unit, and the third switch unit respectively. The third protection control unit detects the current passing through the third sampling unit.

16. The battery module according to claim 5, wherein: The first protection circuit includes a first protection control unit, a first sampling unit and a first switch unit; wherein The first protection control unit is configured to control the first switch unit to disconnect when it determines that the voltage or current passing therethrough exceeds a fifth threshold range; The second protection circuit includes a third protection control unit, a third sampling unit and a third switch unit; wherein The third protection control unit is configured to control the third switch unit to be disconnected when it is determined that the voltage or current passing through the third protection control unit exceeds a sixth threshold range.

17. The battery module according to claim 6, wherein: The third protection circuit includes a fourth protection control unit, a fourth sampling unit and a fourth switch unit; wherein The fourth sampling unit is electrically connected to the second tab, the fourth protection control unit, and the fourth switch unit, respectively, and the fourth protection control unit detects the current passing through the fourth sampling unit; The fourth switch unit is electrically connected to the fourth protection control unit, the fourth sampling unit, and the first battery interface respectively; The fourth protection control unit is configured to control the switch unit to disconnect when it determines that the voltage or current passing through the fourth protection control unit exceeds a seventh threshold range.

18. The battery module according to claim 7, characterized in that: The first protection circuit includes a first protection control unit, a first sampling unit and a first switching unit; The second protection circuit includes a third protection control unit, a third sampling unit and a third switch unit; The third protection circuit includes a fourth protection control unit, a fourth sampling unit and a fourth switch unit; The fourth protection circuit includes a fifth protection control unit, a fifth sampling unit and a fifth switch unit; in The first sampling unit is electrically connected to the first tab, the first protection control unit, and the first switch unit. The first protection control unit detects the current passing through the first sampling unit. The first switch unit is electrically connected to the first protection control unit, the first sampling unit, and the first battery interface, respectively. The third sampling unit is electrically connected to the first tab, the third protection control unit, and the third switch unit. The third protection control unit detects the current passing through the third sampling unit. The third switch unit is electrically connected to the third protection control unit, the third sampling unit, and the first battery interface, respectively. The fourth sampling unit is electrically connected to the third tab, the fourth protection control unit, and the fourth switch unit, and the fourth protection control unit detects the current passing through the fourth sampling unit; the fourth switch unit is electrically connected to the fourth protection control unit, the fourth sampling unit, and the second battery interface respectively; The fifth sampling unit is electrically connected to the third tab, the fifth protection control unit, and the fifth switch unit. The fifth protection control unit detects the current passing through the fifth sampling unit. The fifth switch unit is electrically connected to the fifth protection control unit, the fifth sampling unit, and the second battery interface, respectively. The first protection control unit, the third protection control unit, the fourth protection control unit, and the fifth protection control unit are respectively configured to control the switch unit to disconnect when determining that the voltage or current passing therethrough exceeds a ninth threshold range.

19. The battery module according to claim 2, wherein: It also includes a third battery interface, which is also used to electrically connect to components outside the battery module.

20. A charging module comprising a circuit board and the battery module according to any one of claims 1 to 19, wherein the circuit board is electrically connected to the battery module; The circuit board is electrically configured to receive a first charging voltage provided externally, step down the first charging voltage to obtain a cell voltage, and output the cell voltage to the battery module.

21. An electronic device comprising a functional circuit and the charging module according to claim 20, wherein the charging module is used to provide working power for the functional circuit.

22. The battery module according to any one of claims 1 to 19, characterized in that: The battery cell body includes a first pole piece and a second pole piece, and the polarity of the first pole piece is different from that of the second pole piece; The first pole piece includes a first active area, and the first active area is coated with a first conductive material; The second pole piece includes a second active area, and the second active area is coated with a second conductive material; The first pole tab and the third pole tab are both located in the first effective area of the first pole piece, and The second pole tab is located in the second effective area of the second pole piece.

23. The battery module according to claim 22, characterized in that: The length of the overlapping area between the first pole piece and the first pole tab is smaller than the width of the first pole piece.

24. The battery module according to claim 22, wherein: The length of the rewriting region between the second pole piece and the second pole tab is smaller than the width of the second pole piece.

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