Battery switch driving module and battery equalization system and device

Abstract

The invention discloses a battery switch driving module which comprises a driving array and a switch array, the driving array comprises a plurality of driving units, the switch array comprises a plurality of switch units, and one driving unit is connected with a bidirectional converter through one switch unit. The other driving unit is connected with one battery of the battery pack through the other switch unit; the driving unit generates a switch driving signal according to the received switch control signal, and the switch unit is connected or disconnected according to the received switch driving signal, so that a current path between the battery pack and the bidirectional converter is connected or disconnected, and the charging and discharging conditions of each battery in the battery pack are adjusted. The charging and discharging control process of each battery in the battery pack can be more convenient and efficient, so that the charge state of each battery can be efficiently adjusted, and the service life of the battery pack is prolonged. Meanwhile, the structure and the connection mode are simple, the size is small, the structure is compact, and replacement and integration are convenient.

Description

Technical Field

[0001] The present application relates to the technical field of battery balancing, and in particular to a battery switch driving module, a battery balancing system and a battery balancing device. Background Art

[0002] Nowadays, battery drive systems are in a period of rapid development, with continuous breakthroughs in technology, such as increased energy density, faster charging speed, and optimized battery management systems. At the same time, market applications are becoming increasingly widespread. Among them, cell balancing is a key technology in battery drive systems, which ensures that the voltage and charge state of each single cell in the battery pack remain consistent.

[0003] Traditional battery drive is usually implemented using optocouplers or transformers. However, the use of optocouplers often results in high power consumption. At the same time, the use of transformers will bring about problems such as complex control, large size and high cost. Summary of the invention

[0004] The purpose of this application is to provide a battery switch drive module, a battery balancing system and a device to solve the technical problems of complex control and high integration difficulty of the existing battery drive system in the prior art. The preferred technical solutions among the many technical solutions provided in this application can produce many technical effects as described below.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a battery switch driving module, wherein the battery switch driving module comprises a driving array and a switch array, wherein the driving array comprises a plurality of driving units, and the switch array comprises a plurality of switch units, wherein one of the driving units is connected to a bidirectional converter via one of the switch units, and another of the driving units is connected to a battery in a battery pack via another of the switch units; the driving unit generates a switch driving signal according to a received switch control signal, and the switch unit is turned on or off according to the received switch driving signal, thereby turning on or off the current path between one or more batteries in the battery pack and the bidirectional converter, respectively, so as to regulate the charge and discharge conditions of each battery in the battery pack.

[0007] In some embodiments, the drive array includes a polarity switch drive array and a battery switch drive array, the switch array includes a polarity switch array and a battery switch array, the polarity switch array is connected to the polarity switch drive array, the battery switch array and the bidirectional converter, the polarity switch array receives a switch drive signal sent by the polarity switch drive array, and is turned on or off according to the switch drive signal to turn on or off the current path between the bidirectional converter and the battery switch array.

[0008] In some embodiments, the battery switch array is connected to the battery switch drive array and the battery pack. The battery switch array receives a switch drive signal sent by the battery switch drive array and is turned on or off according to the switch drive signal to turn on or off the current path between the battery pack and the polarity switch array.

[0009] In some embodiments, the polarity switch drive array includes multiple polarity switch drive units, and the battery switch drive array includes multiple battery switch drive units; the polarity switch array includes multiple polarity switch units, and the battery switch array includes multiple battery switch units; one of the polarity switch drive units is connected to the positive or negative pole of the bidirectional converter through one of the polarity switch units, and one of the battery switch drive units is connected to any battery in the battery pack through one of the battery switch units.

[0010] In some embodiments, the polarity switch unit is an NMOS tube; the gate of the polarity switch unit is connected to the polarity switch driving unit to receive the switch driving signal; the source of the polarity switch unit is connected to the polarity switch driving unit to receive the floating ground signal; the drain of the polarity switch unit is connected to the bidirectional converter.

[0011] In some embodiments, the polarity switch units at each odd-numbered position are connected to each other, and the polarity switch units at each even-numbered position are connected to each other.

[0012] In some embodiments, the polarity switch array includes four polarity switch units, the polarity switch drive array includes four polarity switch drive units, the battery switch array includes N battery switch units, the battery switch drive array includes N battery switch drive units, and the battery pack includes N batteries.

[0013] In some embodiments, the battery switch unit includes an NMOS tube and / or two back-to-back connected NMOS tubes and / or two face-to-face connected NMOS tubes; wherein the drains of the face-to-face connected two NMOS tubes with a common gate are connected to each other, the source of one NMOS tube is connected to the battery switch drive unit, and the source of the other NMOS tube is connected to the battery pack, and the sources of the back-to-back connected two NMOS tubes with a common gate are connected to each other, the drain of one NMOS tube is connected to the battery switch drive unit, and the drain of the other NMOS tube is connected to the battery pack.

[0014] In some embodiments, each battery switch unit at an odd-numbered position is connected to each other, and each battery switch unit at an even-numbered position is connected to each other.

[0015] In some embodiments, the polarity switch unit at each odd-numbered position and the battery switch unit are connected to each other, and the polarity switch unit at each even-numbered position and the battery switch unit are connected to each other.

[0016] In some embodiments, the battery switch driving module includes multiple battery switch driving sub-modules; each battery switch driving sub-module includes M correspondingly connected polarity switch driving units and M corresponding polarity switch units, or each battery switch driving sub-module includes N correspondingly connected battery switch driving units and N corresponding battery switch units.

[0017] In some embodiments, the driving unit includes a driving chip, a first capacitor, a second capacitor and a first resistor; the first end of the driving chip is connected to a power supply voltage, the second end of the driving chip is grounded, wherein the first capacitor is connected between the first end and the second end of the driving chip; the third end of the driving chip is connected to a control module to receive the switch control signal; the fourth end of the driving chip is connected to the switch unit to output a floating ground signal; the fifth end of the driving chip is connected to the switch unit to output the switch drive signal; the sixth end of the driving chip is connected to a boost module through the first resistor, wherein the boost module can supply power to the driving chip, and the sixth end of the driving chip is connected to the fourth end of the driving chip through the second capacitor.

[0018] In a second aspect, the present application provides a battery switch driving chip, comprising the battery switch driving module as described above.

[0019] In a third aspect, the present application provides a battery balancing system, comprising: a control module, a battery switch driving module, a boost module and a bidirectional converter; the control module is connected to the boost module and the battery switch driving module, and sends a switch control signal to the battery switch driving module; the battery switch driving module comprises a drive array and a switch array, the drive array comprises a plurality of drive units, the switch array comprises a plurality of switch units, one of the drive units is connected to the bidirectional converter through one of the switch units, and another of the drive units is connected to a battery of a battery pack through another of the switch units; the drive unit generates a switch drive signal according to the received switch control signal, and the switch unit turns on or off according to the received switch drive signal, and turns on or off the current path between one or more batteries in the battery pack and the bidirectional converter, respectively, to regulate the charge and discharge conditions of each battery in the battery pack; the boost module is connected to the drive array and the battery pack, and supplies power to the drive array; the bidirectional converter is connected to the battery pack through the switch array, and is used to perform charge and discharge operations on each battery in the battery pack.

[0020] In some embodiments, the boost module is configured to provide a voltage VSTACK+VCC to the driving array of the battery switch driving module according to a pulse width modulation signal of the control module, a voltage VCC provided by a power supply voltage, and a voltage VSTACK provided by the battery pack.

[0021] In some embodiments, the boost module includes a boost chip, a third capacitor, a fourth capacitor, a fifth capacitor, a first diode and a second diode; the first end of the boost chip is connected to the power supply voltage, and the second end of the boost chip is grounded, wherein the third capacitor is connected between the first end and the second end of the boost chip; the third end of the boost chip is connected to the control module to receive the pulse width modulation signals of different frequencies, and the pulse width modulation signals are used to control the output voltage amplitude and output power of the boost chip; the fourth end of the boost chip is connected to the second end of the boost chip and grounded; the fifth end of the boost chip is connected to one end of the fourth capacitor; the sixth end of the boost chip is connected to the first end of the boost chip.

[0022] In some embodiments, the cathode of the first diode is connected to the driving array for sending the voltage VSTACK+VCC; the anode of the second diode is connected to the battery pack for receiving the voltage VSTACK; the fifth capacitor is connected between the cathode of the first diode and the anode of the second diode, and the anode of the first diode and the anode of the second diode are both connected to the other end of the fourth capacitor.

[0023] In some embodiments, the boost module enters or stops working according to the enable signal provided by the control module; or the boost module enters or stops working according to whether the pulse width modulation signal provided by the control module is in operation, or the boost module adjusts the magnitude and ripple of the voltage VSTACK+VCC according to the duty cycle or frequency of the pulse width modulation signal, and the control module performs real-time adjustment and control according to the needs of the entire battery balancing system.

[0024] In a fourth aspect, the present application provides a battery balancing device, wherein the battery balancing device includes the battery switch driving module as described above.

[0025] In a fifth aspect, the present application provides a battery balancing device, wherein the battery balancing device includes the battery switch driving chip as described above.

[0026] In a sixth aspect, the present application provides a battery balancing device, wherein the battery balancing device includes the battery balancing system as described above.

[0027] Implementing one of the above-mentioned technical solutions of the present application has the following advantages or beneficial effects: In the present application, the driving unit in the driving array can be connected to the battery in the bidirectional converter or the battery pack through the corresponding switch unit in the switch array, and the driving unit can control the switch unit to be turned on or off by sending a switch drive signal to change the current path between the battery pack and the bidirectional converter. In this case, the charge and discharge control process of each battery in the battery pack can be made more convenient and efficient, so that the charge state of each battery can be efficiently adjusted, the service life of the battery pack is extended, and the battery pack can operate reliably. At the same time, the structure and connection method of the embodiment of the present application are simple, and the battery switch drive module is small in size and compact in structure, which is convenient for replacement and integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. It is obvious that the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0029] Figure 1 This is a structural block diagram of a battery switch driving module according to an embodiment of the present application;

[0030] Figure 2 is another structural block diagram of the battery switch driving module of the embodiment of the present application;

[0031] Figure 3 This is a schematic diagram of the connection relationship of the battery switch driving module of the embodiment of the present application;

[0032] Figure 4 is another schematic diagram of the connection relationship of the battery switch driving module in the embodiment of the present application;

[0033] Figure 5 is a schematic diagram of a driving unit according to an embodiment of the present application;

[0034] Figure 6 is a schematic diagram of a signal waveform of a driving unit according to an embodiment of the present application;

[0035] Figure 7 is a schematic diagram of a switch unit according to an embodiment of the present application;

[0036] Figure 8 is another structural block diagram of the battery switch driving module of the embodiment of the present application;

[0037] Fig. 9 is a structural block diagram of a battery balancing system according to an embodiment of the present application;

[0038] Fig.10 Schematic diagram of a circuit of a boost module according to an embodiment of the present application.

[0039] In the figure: 10, battery switch driving module; 100, driving array; 110, switch array; 101, driving unit; 111, switch unit; 120, polarity switch driving array; 121, polarity switch driving unit; 130, polarity switch array; 131, polarity switch unit; 140, battery switch driving array; 141, battery switch driving unit; 150, battery switch array; 151, battery switch unit; 20, battery pack; 30, bidirectional converter; 40, control module; 50, boost module; 1, battery balancing system. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present application clearer, the various exemplary embodiments to be described below will refer to the corresponding drawings, which constitute a part of the exemplary embodiments, wherein various exemplary embodiments that may be used to implement the present application are described. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present disclosure. It should be understood that they are only examples of processes, methods, and devices that are consistent with some aspects disclosed in the present application as detailed in the attached claims, and other embodiments may also be used, or the embodiments listed herein may be modified in structure and function without departing from the scope and essence of the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", etc. indicate the orientation or positional relationship based on the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the elements referred to must have a specific orientation, be constructed and operated in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "multiple" means two or more. The terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0042] In order to illustrate the technical solution described in the present application, a specific embodiment is provided below, and only the parts related to the embodiment of the present application are shown.

[0043] like Figures 1 to 4 As shown, the present application provides a battery switch driving module 10 .

[0044] In some embodiments, the battery switch driving module 10 may include a driving array 100 and a switch array 110. The driving array 100 may be connected to the switch array 110.

[0045] In some embodiments, the driving array 100 may include a plurality of driving units 101, and the switch array 110 may include a plurality of switch units 111. One switch unit 111 may be connected to one driving unit 101. The driving unit 101 may generate a switch driving signal according to a received switch control signal, and the switch unit 111 may be turned on or off according to the received switch driving signal, and may turn on or off a current path between one or more batteries in the battery pack 20 and the bidirectional converter 30, respectively, to adjust the charge and discharge conditions of each battery in the battery pack 20. One driving unit 101 may be connected to the bidirectional converter 30 or a battery in the battery pack 20 through one switch unit 111. One driving unit 101 may be connected to the bidirectional converter 30 through one switch unit 111, and another driving unit 101 may be connected to a battery in the battery pack 20 through another switch unit 111.

[0046] In some embodiments, the driver array 100 may generate a switch drive signal according to the received switch control signal, and each switch unit 111 in the switch array 110 may be turned on or off according to the received switch drive signal. Specifically, the driver array 100 generates a corresponding switch drive signal according to the high and low levels and duration of the switch control signal provided by the control module 40 to control the conduction and shutdown of each switch unit 111 in the switch array 110. For example, when it is at a high level, each switch unit 111 in the switch array 110 is turned on, and when it is at a low level, each switch unit 111 in the switch array 110 is turned off; or when it is at a low level, each switch unit 111 in the switch array 110 is turned on, and when it is at a high level, each switch unit 111 in the switch array 110 is turned off. The gate time or the closing time of each switch unit 111 in the switch array 110 can be controlled by the duration of the high and low levels.

[0047] In some embodiments, one end of the battery switch driving module 10 can be connected to the control module 40 to receive the switch control signal sent by the control module 40; the other end of the battery switch driving module 10 can be connected to the battery pack 20 and the bidirectional converter 30, and the battery switch driving module 10 can switch the current flowing through the battery pack 20 and the bidirectional converter 30 according to the switch control signal. For example, when it is necessary to charge and discharge any battery in the battery pack 20, the driving array 100 can send a switch drive signal to the switch unit 111 connected between the battery pack 20 and the bidirectional converter 30 to control it to be turned on or off.

[0048] In some embodiments, the drive array 100 may include a polarity switch drive array 120 and a battery switch drive array 140. The polarity switch drive array 120 may include a plurality of polarity switch drive units 101, and the battery switch drive array 140 may include a plurality of battery switch drive units 141. For example, the polarity switch drive array 120 may include M polarity switch drive units 101, and the battery switch drive array 140 may include N battery switch drive units 141, that is, the drive array 100 may include N+M drive units 101. That is, the drive unit 101 may include a polarity switch drive unit 101 and a battery switch drive unit 141.

[0049] In some embodiments, the switch control signal received by the polarity switch drive array 120 may be referred to as a polarity switch control signal, and the switch control signal received by the battery switch drive array 140 may be referred to as a battery switch control signal. The switch drive signal sent by the polarity switch drive array 120 may be referred to as a polarity switch drive signal, and the switch drive signal sent by the battery switch drive array 140 may be referred to as a battery switch drive signal.

[0050] In some embodiments, Figure 5 As shown, the driving unit 101 may include a driving chip, a first capacitor C1, a second capacitor C2 and a first resistor R1. Specifically, the first end of the driving chip may be connected to the power supply voltage VCC, the second end of the driving chip may be grounded, wherein the first end and the second end of the driving chip are connected with the first capacitor C1; the third end of the driving chip may be connected to the control module 40 to receive the switch control signal; the fourth end of the driving chip may be connected to the switch unit 111 to output the floating ground signal; the fifth end of the driving chip may be connected to the switch unit 111 to output the switch drive signal; the sixth end of the driving chip may be connected to the boost module 50 through the first resistor R1, wherein the boost module 50 may supply power to the driving chip, and the sixth end of the driving chip may be connected to the fourth end of the driving chip through the second capacitor C2. The polarity switch driving unit 101 may be the same as the battery switch driving unit 141. Figure 5 and Figure 6The FPWM signal is the switch drive signal, and the FCND signal is the floating ground signal.

[0051] In some embodiments, the model of the driver chip may be JT2234.

[0052] As mentioned above, the conventional drive array is generally composed of optocouplers or relays, and the control drive and floating drive are complex, the power consumption is high, and the volume is large. Compared with the conventional drive array, the drive array 100 of the embodiment of the present application can support the switch control and drive of any battery string within 800 volts, and is uniformly powered by the boost module 50; at the same time, the power consumption of a single drive unit 101 is extremely low (less than 15 microamperes), and the process of controlling the on and off of the switch array 110 is convenient. The drive array 100 is small in size and compact in structure, and is easy to replace and integrate.

[0053] In some embodiments, the switch array 110 may include a polarity switch array 130 and a battery switch array 150 .

[0054] In some embodiments, the polarity switch array 130 can be connected to the polarity switch drive array 120, the battery switch array 150, and the bidirectional converter 30. The polarity switch array 130 can receive the switch drive signal sent by the polarity switch drive array 120, and turn on or off according to the switch drive signal to turn on or off the current path between the bidirectional converter 30 and the battery switch array 150. The switch drive signal received by the polarity switch array 130 can be called a polarity switch drive signal. One polarity switch drive unit 101 can be connected to the positive or negative pole of the bidirectional converter 30 through one polarity switch unit 131.

[0055] In some embodiments, the polarity switch array 130 may include a plurality of polarity switch units 131, for example, the polarity switch array 130 may include 1 to 4 polarity switch units 131. Each polarity switch unit 131 may be connected to a corresponding polarity switch drive unit 101 and a bidirectional converter 30. The polarity switch unit 131 may be an NMOS tube. When the gate voltage of the NMOS tube is higher than the threshold voltage, the NMOS tube may be in a conducting state; correspondingly, when the gate voltage of the NMOS tube is lower than the threshold voltage, the NMOS tube may be in a closed state. The polarity switch unit 131 may correspond one to one with the polarity switch drive unit 101.

[0056] In some embodiments, the gate of the polarity switch unit 131 can be connected to the polarity switch driving unit 101 to receive a polarity switch driving signal. Further, the gate of the polarity switch unit 131 can be connected to the fifth end of the polarity switch driving unit 101; the source of the polarity switch unit 131 can be connected to the polarity switch driving unit 101 to receive a floating ground signal. Further, the source of the polarity switch unit 131 can be connected to the fourth end of the polarity switch driving unit 101; the drain of the polarity switch unit 131 can be connected to the bidirectional converter 30, specifically, the drain of the polarity switch unit 131 can be connected to the output positive pole of the bidirectional converter 30.

[0057] In other embodiments, the polarity switch unit 131 may be reversely connected. In this case, the source of the polarity switch unit 131 may be connected to both the fourth terminal of the polarity switch driving unit 101 and the bidirectional converter 30 , and the source of the polarity switch unit 131 may be connected to the output negative electrode of the bidirectional converter 30 .

[0058] In some embodiments, the first polarity switch unit 131 of the polarity switch array 130 can be connected to the third, fifth, ..., 2M+1 polarity switch units 131 (and so on), and the second polarity switch unit 131 of the polarity switch array 130 can be connected to the fourth, sixth, ..., 2M+2 polarity switch units 131 (and so on). That is, in the order of arrangement, the polarity switch units 131 at each odd position can be connected to each other, and correspondingly, the polarity switch units 131 at each even position can be connected to each other.

[0059] In some embodiments, the polarity switch array 130 may include four polarity switch units 131, wherein the first two polarity switch units 131 may be connected in a forward direction, and the last two polarity switch units 131 may be connected in a reverse direction. Specifically, the gate of the first polarity switch unit 131 may be connected to the fifth terminal of the first polarity switch driving unit 101, the source may be connected to the fourth terminal of the first polarity switch driving unit 101, and the drain may be connected to the positive output terminal of the bidirectional converter 30. The gate of the second polarity switch unit 131 may be connected to the fifth terminal of the second polarity switch driving unit 101, the source may be connected to the fourth terminal of the second polarity switch driving unit 101, and the drain of the second polarity switch unit 131 may be connected to the positive output terminal of the bidirectional converter 30. The gate of the third polarity switch unit 131 may be connected to the fifth terminal of the third polarity switch driving unit 101, the source may be connected to the fourth terminal of the third polarity switch driving unit 101 and the negative output terminal of the bidirectional converter 30, and the drain may be connected to the source of the first polarity switch unit 131. The gate of the fourth polarity switch unit 131 can be connected to the fifth end of the fourth polarity switch driving unit 101, the source can be connected to the fourth end of the fourth polarity switch driving unit 101 and the output negative electrode of the bidirectional converter 30, and the drain can be connected to the source of the second polarity switch unit 131.

[0060] In some embodiments, the polarity switch array 130 may include four polarity switch units 131, the polarity switch drive array 120 may include four polarity switch drive units 121, the battery switch array 150 may include N battery switch units 151, the battery switch drive array 140 may include N battery switch drive units 141, and the battery pack 20 may include N batteries.

[0061] In some embodiments, the battery switch array 150 may be connected to both the battery switch drive array 140 and the battery pack 20. The battery switch array 150 may receive a switch drive signal sent by the battery switch drive array 140 and be turned on or off according to the switch drive signal to turn on or off the current path between the battery pack 20 and the polarity switch array 130. The switch drive signal received by the battery switch array 150 may be referred to as a battery switch drive signal.

[0062] In some embodiments, the battery switch array 150 may include a plurality of battery switch units 151. Each battery switch unit 151 may be connected to a corresponding battery switch driving unit 141 and a corresponding battery in the battery pack 20, that is, one battery switch driving unit 141 may be connected to one battery through one battery switch unit 151.

[0063] In some embodiments, the battery switch unit 151 may include an NMOS transistor and / or a combination of NMOS transistors. Figure 7 As shown, the battery switch unit 151 may include one NMOS tube and / or two back-connected NMOS tubes and / or two face-connected NMOS tubes. Specifically, the two face-connected NMOS tubes may refer to two NMOS tubes with a common gate whose drains are connected to each other, one of which has a source connected to the battery switch drive unit 141, and the other has a source connected to the battery pack 20. The two back-connected NMOS tubes may refer to two NMOS tubes with a common gate whose sources are connected to each other, one of which has a drain connected to the battery switch drive unit 141, and the other has a drain connected to the battery pack 20.

[0064] In some embodiments, the battery switch unit 151 may correspond one-to-one with the battery switch driving unit 141 .

[0065] In some embodiments, the gate of the battery switch unit 151 can be connected to the polarity switch driving unit 101 to receive the battery switch driving signal. Further, the gate of the battery switch unit 151 can be connected to the fifth terminal of the battery switch driving unit 141. The source of the battery switch unit 151 can be connected to the battery switch driving unit 141 to receive the floating ground signal. Further, the source of the battery switch unit 151 can be connected to the fourth terminal of the battery switch driving unit 141; the drain of the battery switch unit 151 can be connected to the battery. The battery switch unit 151 can correspond to the batteries in the battery pack 20 one by one, for example, the Nth battery switch unit 151 can be connected to the Nth battery.

[0066] In some embodiments, the battery switch unit 151 may be reversely connected. At this time, the source of the battery switch unit 151 may be connected to both the fourth terminal of the battery switch driving unit 141 and the battery pack 20 .

[0067] In some embodiments, when the battery switch unit 151 is two back-to-back connected NMOS tubes, the drain of one of the NMOS tubes may be connected to the fourth end of the battery switch driving unit 141, and the drain of the other NMOS tube may be connected to the battery pack 20. At this time, the fourth end of the battery switch driving unit 141 may also be connected to the sources of the two back-to-back connected NMOS tubes.

[0068] In some embodiments, when the battery switch unit 151 is two NMOS transistors connected facing each other, the source of one of the NMOS transistors can be connected to the fourth terminal of the battery switch driving unit 141, and the source of the other NMOS transistor can be connected to the battery pack 20. At this time, the fourth terminal of the battery switch driving unit 141 can also be connected to the source of the other NMOS transistor.

[0069] In some embodiments, the first battery switch unit 151 of the battery switch array 150 can be connected to the third, fifth, ..., 2N+1th battery switch unit 151 (and so on), and the second battery switch unit 151 of the battery switch array 150 can be connected to the fourth, sixth, ..., 2M+2th battery switch unit 151 (and so on). That is, in the order of arrangement, each battery switch unit 151 at an odd position can be connected to each other, and correspondingly each battery switch unit 151 at an even position can be connected to each other.

[0070] In some embodiments, the Nth battery switch unit 151 of the battery switch array 150 can be connected to the Mth polarity switch unit 131 of the polarity switch array 130. It should be noted that M and N here are only used to distinguish the switch units 111, and both M and N represent the number. In fact, M and N are the same. For example, the first battery switch unit 151 can be connected to the first polarity switch unit 131. According to the arrangement order, the polarity switch unit 131 and the battery switch unit 151 at each odd position can be connected to each other, and correspondingly, the polarity switch unit 131 and the battery switch unit 151 at each even position can be connected to each other.

[0071] In some embodiments, Figure 8 As shown, the battery switch driving module 10 may include a plurality of battery switch driving submodules. Each battery switch driving submodule may include a polarity switch driving unit 101 and a polarity switch unit 131 connected to each other, or each battery switch driving submodule may include M polarity switch driving units 101 and M polarity switch units 131 connected to each other. Each battery switch driving submodule may include a battery switch driving unit 141 and a battery switch unit 151 connected to each other, or each battery switch driving submodule may include N battery switch driving units 141 and N battery switch units 151 connected to each other. The battery switch driving submodule may be an integrated single chip or a multi-chip package.

[0072] The present application relates to a battery switch driving chip, which may include the battery switch driving module 10 as described above.

[0073] The present application relates to a battery balancing system 1. In some embodiments, Fig. 9 As shown, the battery balancing system 1 may include a control module 40 , a battery switch driving module 10 , a boost module 50 and a bidirectional converter 30 .

[0074] In some embodiments, the battery switch driving module 10 may include a driving array 100 and a switch array 110. The driving array 100 may include multiple driving units 101. The switch array 110 may include multiple switch units 111. One driving unit 101 may be connected to the bidirectional converter 30 via one switch unit 111, and another driving unit 101 may be connected to a battery in the battery pack 20 via another switch unit 111.

[0075] In some embodiments, the driving unit 101 can generate a switch driving signal according to the received switch control signal, and the switch unit 111 can be turned on or off according to the received switch driving signal, and turn on or off the current path between one or more batteries in the battery pack 20 and the bidirectional converter 30 respectively, so as to regulate the charge and discharge conditions of each battery in the battery pack 20; the boost module 50 is connected to the driving array 100 and the battery pack 20, and supplies power to the driving array 100; the bidirectional converter 30 can be connected to the battery pack 20 through the switch array 110, and is used to perform charge and discharge operations on each battery in the battery pack 20.

[0076] In some embodiments, the boost module 50 can be configured to provide a voltage VSTACK+VCC to the drive array 100 according to the pulse width modulation signal of the control module 40, the voltage VCC provided by the power supply voltage, and the voltage VSTACK provided by the battery pack 20. Thus, the boost module 50 can generate a boost voltage higher than the voltage of the battery pack 20 to power the drive array 100 of the battery switch driving module 10.

[0077] In some embodiments, Fig.10 As shown, the boost module 50 may include a boost chip, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first diode J1 and a second diode J2. Specifically, the first end of the boost chip may be connected to the power supply voltage VCC, the second end of the boost chip may be grounded, wherein the third capacitor C3 is connected between the first end and the second end of the boost chip; the third end of the boost chip may be connected to the control module 40 to receive pulse width modulation signals of different frequencies, and the pulse width modulation signal may be used to control the output voltage amplitude and output power of the boost chip; the fourth end of the boost chip may be connected to the second end of the boost chip and grounded; the fifth end of the boost chip may be connected to one end of the fourth capacitor C4; the sixth end of the boost chip may be connected to the first end of the boost chip.

[0078] In some embodiments, the cathode of the first diode J1 may be connected to the driving array 100, and further, the cathode of the first diode J1 may be connected to each driving unit 101. The anode of the second diode J2 may be connected to the battery pack 20 for receiving the voltage VSTACK. A fifth capacitor C5 is connected between the cathode of the first diode J1 and the anode of the second diode J2, and the anode of the first diode J1 and the anode of the second diode J2 may be connected to the other end of the fourth capacitor C4.

[0079] In some embodiments, the boost module 50 can enter or stop working according to the enable signal provided by the control module 40. For example, when the enable signal is at a high level, the boost module 50 can enter the working state; when the enable signal is at a low level, the boost module 50 can stop working to save power consumption.

[0080] In some embodiments, the boost module 50 may enter or stop working according to the pulse width modulation signal provided by the control module 40. The boost module 50 may adjust the magnitude and ripple of the voltage VSTACK+VCC according to the duty cycle or frequency of the pulse width modulation signal.

[0081] In some embodiments, the control module 40 can perform real-time adjustment and control according to the needs of the entire battery balancing system 1 .

[0082] In some embodiments, the boost module 50 may also be in working state all the time. The boost chip may be the same as the driver chip, and the model of the boost chip may be JT2234.

[0083] In some embodiments, the control module 40 can be configured to control and manage the boost module 50, the drive array 100 and the switch array 110, and provide the bidirectional converter 30 with an on path and a off path for charge and discharge management of any battery in the battery pack 20, so as to perform balancing management of any battery in the battery pack 20.

[0084] In some embodiments, the control module 40 may provide a pulse width modulation signal to the boost module 50 to adjust the output voltage and output power of the boost module 50 .

[0085] In some embodiments, the control module 40 may send a switch control signal to the drive array 100 of the battery switch drive module 10 , the drive array 100 may generate a switch drive signal according to the switch control signal, and the switch array 110 may be turned on or off according to the switch drive signal.

[0086] In some embodiments, the control module 40 may send a switch control signal to each driving unit 101 in the driving array 100 .

[0087] Specifically, the control module 40 may send a polarity switch control signal to the polarity switch driving unit 101, and the control module 40 may send a battery switch control signal to the battery switch driving unit 141. The polarity switch driving unit 101 may generate a polarity switch driving signal according to the high and low levels and duration of the polarity switch control signal, and the polarity switch unit 131 may be turned on or off within the duration according to the polarity switch driving signal.

[0088] In some embodiments, the control module 40 may be an MCU chip or an ASIC chip.

[0089] Meanwhile, the present application also provides a battery balancing device (not shown), which may include the above-mentioned battery switch driving module 10. The components and connection relationships of the battery switch driving module 10 are as described above and will not be repeated here.

[0090] Similarly, the present application also provides a battery balancing device (not shown), which may include the battery switch driver chip mentioned above. The structure of the battery switch driver chip is as described above, and will not be repeated here.

[0091] Similarly, the present application also provides a battery balancing device (not shown), which may include the above-mentioned battery balancing system 1. The structure of the battery balancing system 1 is as described above, and will not be repeated here.

[0092] In the present application, the driving unit 101 in the driving array 100 can be connected to the bidirectional converter 30 or the battery in the battery pack 20 through the corresponding switch unit 111 in the switch array 110, and the driving unit 101 can control the switch unit 111 to turn on or off by sending a switch drive signal, thereby changing the current path between the battery pack 20 and the bidirectional converter 30. In this case, the charge and discharge control process of each battery in the battery pack 20 can be made more convenient and efficient, so that the charge state of each battery can be efficiently adjusted, the service life of the battery pack 20 is extended, and the battery pack 20 can operate reliably. At the same time, the structure and connection method of the embodiment of the present application are simple, and the battery switch driving module 10 is small in size and compact in structure, which is easy to replace and integrate.

[0093] The above is only the preferred embodiment of the present application. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present application.

Claims

1. A battery switch driving module, characterized in that: The battery switch driving module includes a driving array and a switch array, wherein the driving array includes a plurality of driving units, and the switch array includes a plurality of switch units, wherein one of the driving units is connected to a bidirectional converter via one of the switch units, and another of the driving units is connected to a battery of a battery pack via another of the switch units; The driving unit generates a switch driving signal according to the received switch control signal, and the switch unit is turned on or off according to the received switch driving signal, turning on or off the current path between one or more batteries in the battery pack and the bidirectional converter, respectively, to regulate the charging and discharging conditions of each battery in the battery pack.

2. The battery switch driving module according to claim 1, characterized in that: The drive array includes a polarity switch drive array and a battery switch drive array, the switch array includes a polarity switch array and a battery switch array, the polarity switch array is connected to the polarity switch drive array, the battery switch array and the bidirectional converter, the polarity switch array receives a switch drive signal sent by the polarity switch drive array, and is turned on or off according to the switch drive signal to turn on or off the current path between the bidirectional converter and the battery switch array.

3. The battery switch driving module according to claim 2, characterized in that: The battery switch array is connected to the battery switch driving array and the battery pack. The battery switch array receives a switch driving signal sent by the battery switch driving array and is turned on or off according to the switch driving signal to turn on or off the current path between the battery pack and the polarity switch array.

4. The battery switch driving module according to claim 2, characterized in that: The polarity switch drive array includes multiple polarity switch drive units, and the battery switch drive array includes multiple battery switch drive units; the polarity switch array includes multiple polarity switch units, and the battery switch array includes multiple battery switch units; one of the polarity switch drive units is connected to the positive or negative pole of the bidirectional converter through one of the polarity switch units, and one of the battery switch drive units is connected to any battery in the battery pack through one of the battery switch units.

5. The battery switch driving module according to claim 4, characterized in that: The polarity switch unit is an NMOS tube; the gate of the polarity switch unit is connected to the polarity switch driving unit to receive the switch driving signal; the source of the polarity switch unit is connected to the polarity switch driving unit to receive the floating ground signal; the drain of the polarity switch unit is connected to the bidirectional converter.

6. The battery switch driving module according to claim 4, characterized in that: The polarity switch units at each odd-numbered position are connected to each other, and the polarity switch units at each even-numbered position are connected to each other.

7. The battery switch driving module according to claim 4, characterized in that: The polarity switch array includes four polarity switch units, the polarity switch drive array includes four polarity switch drive units, the battery switch array includes N battery switch units, the battery switch drive array includes N battery switch drive units, and the battery pack includes N batteries.

8. The battery switch driving module according to claim 4, characterized in that: The battery switch unit includes an NMOS tube and / or two back-to-back connected NMOS tubes and / or two face-to-face connected NMOS tubes; wherein the drains of the face-to-face connected two NMOS tubes with a common gate are connected to each other, the source of one NMOS tube is connected to the battery switch drive unit, and the source of the other NMOS tube is connected to the battery pack, and the sources of the back-to-back connected two NMOS tubes with a common gate are connected to each other, the drain of one NMOS tube is connected to the battery switch drive unit, and the drain of the other NMOS tube is connected to the battery pack.

9. The battery switch driving module according to claim 4, characterized in that: The battery switch units at each odd-numbered position are connected to each other, and the battery switch units at each even-numbered position are connected to each other.

10. The battery switch driving module according to claim 4, characterized in that: The polarity switch unit at each odd-numbered position and the battery switch unit are connected to each other, and the polarity switch unit at each even-numbered position and the battery switch unit are connected to each other.

11. The battery switch driving module according to claim 4, characterized in that: The battery switch driving module includes multiple battery switch driving sub-modules; each battery switch driving sub-module includes M polarity switch driving units and M polarity switch units connected correspondingly, or each battery switch driving sub-module includes N battery switch driving units and N battery switch units connected correspondingly.

12. The battery switch driving module according to claim 1, characterized in that: The driving unit includes a driving chip, a first capacitor, a second capacitor and a first resistor; the first end of the driving chip is connected to a power supply voltage, the second end of the driving chip is grounded, wherein the first capacitor is connected between the first end and the second end of the driving chip; the third end of the driving chip is connected to a control module to receive the switch control signal; the fourth end of the driving chip is connected to the switch unit to output a floating ground signal; the fifth end of the driving chip is connected to the switch unit to output the switch drive signal; the sixth end of the driving chip is connected to a boost module through the first resistor, wherein the boost module can supply power to the driving chip, and the sixth end of the driving chip is connected to a fourth end of the driving chip through the second capacitor.

13. A battery switch driver chip, characterized in that: A battery switch driving module comprising any one of claims 1-12.

14. A battery balancing system, characterized in that: include: Control module, battery switch driver module, boost module and bidirectional converter; The control module is connected to the boost module and the battery switch driving module, and sends a switch control signal to the battery switch driving module; The battery switch driving module includes a driving array and a switch array, wherein the driving array includes a plurality of driving units, and the switch array includes a plurality of switch units, wherein one of the driving units is connected to the bidirectional converter via one of the switch units, and another of the driving units is connected to a battery of the battery pack via another of the switch units; The driving unit generates a switch driving signal according to the received switch control signal, and the switch unit is turned on or off according to the received switch driving signal, and turns on or off the current path between one or more batteries in the battery pack and the bidirectional converter, so as to adjust the charge and discharge conditions of each battery in the battery pack; the boost module is connected to the driving array and the battery pack, and supplies power to the driving array; The bidirectional converter is connected to the battery pack through the switch array, and is used to perform charging and discharging operations on each battery in the battery pack.

15. The battery equalization system according to claim 14, characterized in that: The boost module is configured to provide a voltage VSTACK+VCC to the driving array of the battery switch driving module according to the pulse width modulation signal of the control module, the voltage VCC provided by the power supply voltage, and the voltage VSTACK provided by the battery pack.

16. The battery equalization system according to claim 15, characterized in that: The boost module includes a boost chip, a third capacitor, a fourth capacitor, a fifth capacitor, a first diode and a second diode; the first end of the boost chip is connected to the power supply voltage, and the second end of the boost chip is grounded, wherein the third capacitor is connected between the first end and the second end of the boost chip; the third end of the boost chip is connected to the control module to receive the pulse width modulation signals of different frequencies, and the pulse width modulation signals are used to control the output voltage amplitude and output power of the boost chip; the fourth end of the boost chip is connected to the second end of the boost chip and is grounded; the fifth end of the boost chip is connected to one end of the fourth capacitor; the sixth end of the boost chip is connected to the first end of the boost chip.

17. The battery equalization system according to claim 16, characterized in that: The cathode of the first diode is connected to the driving array for sending the voltage VSTACK+VCC; the anode of the second diode is connected to the battery pack for receiving the voltage VSTACK; the fifth capacitor is connected between the cathode of the first diode and the anode of the second diode, and the anode of the first diode and the anode of the second diode are both connected to the other end of the fourth capacitor.

18. The battery equalization system according to claim 15, characterized in that: The boost module enters or stops working according to the enable signal provided by the control module; or the boost module enters or stops working according to whether the pulse width modulation signal provided by the control module is in operation, or the boost module adjusts the magnitude and ripple of the voltage VSTACK+VCC according to the duty cycle or frequency of the pulse width modulation signal, and the control module performs real-time adjustment and control according to the needs of the entire battery balancing system.

19. A battery balancing device, characterized in that: The battery balancing device comprises the battery switch driving module according to any one of claims 1 to 12.

20. A battery balancing device, characterized in that: The battery balancing device comprises the battery switch driving chip according to claim 13.

21. A battery balancing device, characterized in that: The battery balancing device comprises the battery balancing system according to any one of claims 14 to 18.

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