Coding type most switch module and energy storage system

Abstract

The application relates to the technical field of energy storage, in particular to a coded MOST switch module, a power taking module and a carrier wave isolation module of which are connected in parallel between a pin K+ and a pin K-, the carrier wave isolation module and the input side of a MOS chipboard driving circuit are connected with a processor respectively, and the processor and the MOS chipboard driving circuit are connected with the power taking module respectively to obtain working power sources of the processor and the MOS chipboard driving circuit; the MOS chipboard driving circuit is connected with a MOS switch chipboard to control the on-off of the MOS switch chipboard, and the MOS switch chipboard is connected with a controlled device in series; the coded MOST switch module has simple wiring; the application further relates to an energy storage system comprising the coded MOST switch module, and the energy storage system has simple wiring and saves space.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, specifically to an coded MOST switch module and an energy storage system including the coded MOST switch module. Background Technology

[0002] Existing energy storage systems all use chemical batteries. To achieve the required battery storage capacity, medium to large-scale energy storage systems first connect several individual batteries in parallel with the same polarity to form a battery pack. Then, these battery packs are connected in series to form a battery assembly. This assembly of multiple battery packs connected in series is also called a battery pack or battery stack, commonly referred to as a battery pack in the industry. For efficient and safe use of a battery pack, a matching battery management system (BMS) is generally required. Within a battery pack, the different locations of individual batteries lead to different operating environments. These different environments affect the charge and discharge characteristics of individual batteries. Differences in the charge and discharge characteristics of one or more individual batteries can affect the overall performance of the battery pack, reducing its overall energy storage capacity and its lifespan.

[0003] Currently, the energy storage industry widely uses batteries retired from the electric vehicle sector. The performance differences of the recycled individual batteries are more pronounced. Due to the differences in characteristics of one or more individual batteries, the overall performance of the battery pack is reduced. If these individual batteries are not effectively charged and discharged, they will age and be damaged more quickly, which will also reduce the overall lifespan of the battery pack.

[0004] To address these issues, switching switches are typically installed in battery packs to control the connection and disconnection of individual cells. This ensures that the internal resistance of the battery pack matches that of other battery packs connected in series, improving voltage consistency and enabling more effective control and management. However, switching switches generally require separate wiring, resulting in a relatively large number of control cables needed in the battery pack. For example, in a large-scale battery pack, if individual cell switching adjustment is implemented to improve voltage consistency across all battery packs, each additional controlled cell requires a switching primary line and a temperature detection line connected to the BMS unit. This large number of control cables significantly increases costs and complicates the overall battery pack assembly process, making individual cell switching adjustment technology difficult to implement due to the extensive control wiring. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an coded MOST switch module with simple wiring; it also provides an energy storage system including the coded MOST switch module with simple wiring and space saving.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An coded MOST switch module includes a processor, a power supply module, a carrier isolation module, a MOS switch core board, a MOS core board drive circuit, and pins K+ and K- for connecting to an external power / control bus. The power supply module and the carrier isolation module are connected in parallel between pins K+ and K-. The input sides of the carrier isolation module and the MOS core board drive circuit are respectively connected to the processor. The processor and the MOS core board drive circuit are respectively connected to the power supply module to obtain their respective operating power. The MOS core board drive circuit is connected to the MOS switch core board to control its on / off state. The MOS switch core board is connected in series with the controlled device.

[0008] Preferably, the coded MOST switch module further includes a sampling module, which includes a voltage sampling and transmitting module connected to the processor for acquiring the voltage values ​​at both ends of the controlled device and a temperature sampling and transmitting module for acquiring the surface temperature of the controlled device.

[0009] Preferably, one voltage sampling terminal of the voltage sampling and transmitting module is connected to the source S of the MOS switch chip, and the other voltage sampling terminal is connected to the voltage sampling pin V.

[0010] Preferably, the temperature sampling and transmitting module includes a thermistor.

[0011] Preferably, the sampling module further includes a first A / D module and a second A / D module. The voltage sampling and transmitting module is connected to the processor through the first A / D module, and the temperature sampling and transmitting module is connected to the processor through the second A / D module. The first A / D module and the second A / D module are respectively connected to the power supply module to obtain their respective operating power.

[0012] Preferably, the coded MOST switch module further includes a D / A module. The MOS core board drive circuit is connected to the processor through the D / A module, and the D / A module is connected to the power supply module to obtain the working power.

[0013] Preferably, the coded MOST switch module further includes a module housing, pins D and S. The processor, power supply module, carrier isolation module, MOS switch core board, MOS core board drive circuit and sampling module are all disposed on a PCB board inside the module housing. Pins D and S are respectively disposed on a pair of sides of the module housing and are respectively connected to the drain D and source S of the MOS switch core board. Pins K+, K1 and voltage sampling pin V are all disposed on one side of the module housing and located between pins D and S. Pins D and S are both made of copper sheets, and pins K+, K- and voltage sampling pin V are all pin-type pins.

[0014] Preferably, the coded MOST switch module can be programmed with an address.

[0015] An energy storage system includes multiple battery packs connected in series and a battery management system (BMS). Each battery pack includes one or more individual cells connected in parallel and at least one coded MOST switch module. Each coded MOST switch module is connected in series with an individual cell and is connected in parallel to a power / control bus via pins K+ and K-. Each coded MOST switch module has a unique address information programmed into it. The power / control bus is connected to the BMS and an external power source, respectively.

[0016] Preferably, the energy storage system further includes a power / bus mixer, through which the power / control bus is connected to the battery management system (BMS) and an external power source, respectively.

[0017] This invention relates to an coded MOST switch module, which includes a power supply module and a carrier isolation module. These two modules are connected in parallel between pins K+ and K-, which are connected to an external power / control bus. This allows communication and power to share the same line, simplifying the wiring of the coded MOST switch module and reducing its required installation space. Furthermore, the MOS switch core board is connected in series with the controlled device. The MOS core board drive circuit controls the on / off state of the MOS switch core board to enable the connection and disconnection of the controlled device. The coded MOST switch module can be programmed with an address, giving it a unique identification address for precise control.

[0018] The energy storage system of this invention uses a battery management system (BMS) that works in conjunction with coded MOST switch modules to achieve communication bus control. It has a high degree of integration, occupies little space, simplifies the wiring within the energy storage system, and implements address allocation management for each coded MOST switch module, which greatly reduces the control wiring within the energy storage system. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the functional module structure of the coded MOST switch module of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal wiring structure of the coded MOST switch module of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the coded MOST switch module of the present invention;

[0022] Figure 4 This is a schematic diagram of the energy storage system of the present invention. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-4 The provided embodiments further illustrate specific implementations of the coded MOST switch module and energy storage system of the present invention. The coded MOST switch and energy storage system of the present invention are not limited to the descriptions in the following embodiments.

[0024] like Figure 1 and 2 As shown, this invention discloses an coded MOST switch module, which can be programmed with an address. It includes a processor 1-5, a power supply module 1-1, a carrier isolation module 1-4, a MOS switch core board 1-7, a MOS core board drive circuit 1-9, and pins K+ and K- for connection to an external power / control bus. The power supply module 1-1 and the carrier isolation module 1-4 are connected in parallel between pins K+ and K-. The input sides of the carrier isolation module 1-4 and the MOS core board drive circuit 1-9 are respectively connected to the processor 1-5. The processor 1-5 and the MOS core board drive circuit 1-9 are respectively connected to the power supply module 1-1 to obtain their respective operating power. The MOS core board drive circuit 1-9 is connected to the MOS switch core board 1-7 to control its on / off state. The MOS switch core board 1-7 is connected in series with the controlled device.

[0025] This invention relates to an coded MOST switch module, which includes a power supply module and a carrier isolation module. These two modules are connected in parallel between pins K+ and K-, which are connected to an external power / control bus. This allows communication and power to share the same line, simplifying the wiring of the coded MOST switch module and reducing its required installation space. Furthermore, the MOS switch core board is connected in series with the controlled device. The MOS core board drive circuit controls the on / off state of the MOS switch core board to enable the connection and disconnection of the controlled device. Additionally, the coded MOST switch module can be programmed with an address, giving it a unique identification address for precise control.

[0026] It should be noted that the coded MOST switch module of the present invention can also be addressed in other ways, all of which can be achieved by existing technologies, and will not be described in detail here.

[0027] Preferably, the processors 1-5 can be programmed with addresses.

[0028] Preferably, the processors 1-5 are programmable microcontrollers or single-chip microcomputers.

[0029] Preferred, such as Figure 2 As shown, the MOS switch core board 1-7 includes a source S, a drain D, and a gate G. The source S and the gate G are respectively connected to the output side of the MOS core board driving circuit 1-9. The MOS switch core board 1-7 is connected in series with the controlled device through the source S and the drain D.

[0030] Specifically, the MOS switch core boards 1-7 are generally matched according to the capacity of the matching battery. For example, a semi-finished MOS transistor of model NCE40H12K before packaging is selected, and its parameter information includes: on-resistance. 0.004Ω 20A, 10V; threshold voltage 2.5V 250μA; Drain-source voltage The voltage is 40V; taking full account of current margin, the maximum operating current of the battery is controlled at about 10A, the charging and discharging current is calculated according to 3C, and the controllable battery capacity is <3.2Ah.

[0031] like Figure 2 As shown, the coded MOST switch module also includes a sampling module, which includes a voltage sampling and transmission module 1-11 for collecting the voltage values ​​at both ends of the controlled device and a temperature sampling and transmission module 1-12 for collecting the surface temperature of the controlled device, both of which are connected to the processor 1-5 respectively.

[0032] Preferred, such as Figure 2 As shown, one voltage sampling terminal of the voltage sampling and transmission module 1-11 is connected to the source S of the MOS switch core board 1-7, and the other voltage sampling terminal is connected to the voltage sampling pin V.

[0033] Preferred, such as Figure 2 As shown, the temperature sampling and transmission module 1-12 includes a thermistor 1-13.

[0034] Specifically, such as Figure 3 As shown, the controlled device is a single cell (referred to as the controlled single cell). One voltage sampling terminal of the voltage sampling and transmission module is connected to the source S of the MOS switch core board 1-7, and the source S is electrically connected to the positive terminal of the controlled single cell. The other voltage sampling terminal is connected to the voltage sampling pin V, and the voltage sampling pin V is electrically connected to the negative terminal of the controlled single cell. The thermistor 1-13 is placed in contact with the controlled single cell in the environment where the controlled single cell is located.

[0035] like Figure 1 As shown, the sampling module further includes a first A / D module 1-31 and a second A / D module 1-32. The voltage sampling and transmitting module 1-11 is connected to the processor 1-5 through the first A / D module 1-31, and the temperature sampling and transmitting module 1-12 is connected to the processor 1-5 through the second A / D module 1-32. The first A / D module 1-31 and the second A / D module 1-32 are respectively connected to the power supply module 1-1 to obtain their respective operating power.

[0036] like Figure 1 As shown, the coded MOST switch module group of the present invention also includes a D / A module 1-30. The MOS core board drive circuit 1-9 is connected to the processor 1-5 through the D / A module 1-30. The D / A module 1-30 is connected to the power supply module 1-1 to obtain the working power.

[0037] like Figure 1 As shown, the coded MOST switch module of the present invention also includes a power supply / bus 1-2, a carrier isolation module 1-4 and a power supply module 1-4 connected in parallel between pin K+ and pin K1 through the power supply / bus 1-2.

[0038] Specifically, such as Figure 1 and 2As shown, the power supply module 1-1 blocks the carrier signals introduced by pins K+ and K-, separating the power supply to provide operating power to the processor 1-5, the MOS core board drive circuit 1-9, and the power supply module respectively; the input terminal of the carrier isolation module 1-4 is connected to pins K+ and K-, blocking the power introduced by pins K+ and K-. The carrier isolation module 1-4 performs bidirectional signal transmission between the external power / control bus and the processor 1-5, that is, the external power / control bus can transmit control signals to the processor 1-5 through the carrier isolation module 1-4, and the processor 1-5 can also transmit communication messages to the external power / control bus through the carrier isolation module 1-4; the processor 1-5 receives the message information sent by the carrier isolation module 1-4, and if a message matching the address of the coded MOST switch module of the present invention is parsed, the message is transmitted downward through the lower-level bus; the processor 1-5 also obtains the voltage sampling and transmission module 1-11 and the current sampling module 1-11 from its lower-level bus in a periodic cyclic scanning manner. The voltage and temperature information of the controlled device transmitted by the transmitter module, along with the address information of the coded MOST switch module, are combined into a data frame in the form of a frame header, data portion, and frame tail. The data frame is then transmitted to the power / control bus via the carrier isolation module 1-4. After the MOS core board drive circuit 1-9 detects the control command message on the lower-level bus of the processor 1-5, it applies a gate-source drive voltage to the gate (G) of the MOS switch core board 1-7 to make the drain (D) and source (S) of the MOS switch core board 1-7 conduct, thereby realizing the on / off control of the MOS switch core board 7. After the voltage sampling and transmitter module 1-11 obtains the voltage value at both ends of the controlled device, it performs A / D conversion through the first A / D module 1-31 and encodes and transmits the voltage value to the lower-level bus of the processor 1-5. The temperature sampling and transmitter module 1-12 obtains the surface contact temperature of the controlled device through the thermistor 1-13 and then performs A / D conversion through the second A / D module 1-32, encodes and transmits the surface contact temperature to the lower-level bus of the processor 1-5.

[0039] The following is one implementation of the power supply module 1-1 and the carrier isolation module 1-4: The power supply module 1-1 and the carrier isolation module 1-4 are implemented by a combination of a capacitor and an inductor; wherein, taking advantage of the characteristic of the capacitor to isolate DC power, a capacitor matching the communication signal is connected in parallel on the power / control bus to effectively separate the communication signal, and the separated communication signal is then connected in parallel with an inductor matching the communication signal for filtering and correction; taking advantage of the characteristic of the inductor to isolate pulse signals, an inductor matching the communication signal is connected in parallel on the power / control bus to separate the DC power, and the separated power is then connected in parallel with a capacitor for filtering.

[0040] like Figure 3The diagram illustrates an embodiment of the coded switch module of the present invention: the coded MOST switch module includes a processor 1-5, a power supply module 1-1, a carrier isolation module 1-4, a MOS switch core board 1-7, a MOS core board drive circuit 1-9, a sampling module, a module housing 1-0, pins D1-6 and S1-8. The processor 1-5, power supply module 1-1, carrier isolation module 1-4, MOS switch core board 1-7, MOS core board drive circuit 1-9, and sampling module are all located in a... On the PCB board inside module housing 1-0, pins D1-6 and S1-8 are respectively located on a pair of sides of module housing 1-0 and connected to the drain D and source S of MOS switch core board 1-7 respectively. Pins K+, K1, and voltage sampling pin V are all located on one side of module housing 1-0 and between pins D1-6 and S1-8. Pins D1-6 and S1-8 are both made of copper sheet, and pins K+, K-, and voltage sampling pin V are all through-hole pins. Further, as... Figure 3 As shown, pins D1-6 and S1-8 are both made of large-area copper sheets, which can withstand large current channels and are also conducive to heat dissipation; pins K+, K- and voltage sampling pin V are arranged side by side at intervals.

[0041] like Figure 4 As shown, the present invention also discloses an energy storage system, which includes multiple battery packs connected in series and a battery management system (BMS). Each battery pack includes one or more individual cells connected in parallel and at least one of the coded MOST switch modules 1. Each coded MOST switch module 1 is connected in series with an individual cell and is connected in parallel via pins K+ and K- on the power / control bus. Each coded MOST switch module has a unique address information programmed into it. The power / control bus is connected to the battery management system (BMS) and an external power source, respectively.

[0042] Preferred, such as Figure 4 As shown, the energy storage system also includes a power / bus mixer 1-14, through which the power / control bus is connected to the battery management system (BMS) and an external power source, respectively.

[0043] Preferred, such as Figure 4 As shown, pins S1-8 of the coded MOST switch module 1 are electrically connected to the positive terminal of the corresponding individual battery cell, and the voltage sampling pin V of the coded MOST switch module 1 is electrically connected to the negative terminal of the corresponding individual battery cell. Further, as... Figure 3 As shown, pins S1-8 of the coded MOST switch module 1 are connected to the negative terminal of the corresponding individual battery cell.

[0044] like Figure 4The diagram illustrates an embodiment of the energy storage system of the present invention: the energy storage system is preferably a battery pack, which includes multiple battery groups connected in series, namely battery groups B1, B2, B3 to Bn. Each battery group includes at least three individual cells connected in parallel. Each battery group is equipped with two coded MOST switch modules. Each coded MOST switch module is connected in series with one individual cell. The individual cell connected in series with the coded MOST switch module is called the controlled individual cell. Each coded MOST switch module is connected to the battery management system (BMS) through a power / control bus and a power / bus mixer 1-14. By programming and setting the corresponding address of each coded MOST switch module, the battery management system (BMS) can obtain the temperature and voltage values ​​of the individual cell corresponding to the coded MOST switch module, and can also control the switching of the controlled cells through the coded MOST switch modules.

[0045] The energy storage system of this invention features a Battery Management System (BMS) that works in conjunction with coded MOST switching modules to achieve communication bus control. This results in high overall integration, a small footprint, and simplified wiring within the energy storage system. Address allocation management for each coded MOST switching module significantly reduces internal control wiring. Furthermore, the BMS, through partial switching control of individual controlled cells, improves the internal resistance consistency of the series-connected battery packs, thereby enhancing the voltage consistency of each individual cell and improving the energy storage capacity and efficiency of the system.

[0046] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An coded MOST switch module, characterized in that, It includes a processor (1-5), a power supply module (1-1), a carrier isolation module (1-4), a MOS switch core board (1-7), a MOS core board drive circuit (1-9), and pins K+ and K- for connecting to an external power / control bus; the power supply module (1-1) and the carrier isolation module (1-4) are connected in parallel between pins K+ and K-, the input sides of the carrier isolation module (1-4) and the MOS core board drive circuit (1-9) are respectively connected to the processor (1-5), and the processor (1-5) and the MOS core board drive circuit (1-9) are respectively connected to the power supply module (1-1) to obtain their respective operating power; the MOS core board drive circuit (1-9) is connected to the MOS switch core board (1-7) to control its on / off state, and the MOS switch core board (1-7) is connected in series with the controlled device; The coded MOST switch module further includes a sampling module, which includes a voltage sampling and transmitting module (1-11) connected to the processor (1-5) for collecting the voltage values ​​at both ends of the controlled device and a temperature sampling and transmitting module (1-12) for collecting the surface temperature of the controlled device; the temperature sampling and transmitting module (1-12) includes a thermistor (1-13).

2. The coded MOST switch module according to claim 1, characterized in that: One voltage sampling terminal of the voltage sampling and transmitting module (1-11) is connected to the source S of the MOS switch core board (1-7), and the other voltage sampling terminal is connected to the voltage sampling pin V.

3. The coded MOST switch module according to claim 1, characterized in that: The sampling module further includes a first A / D module (1-31) and a second A / D module (1-32). The voltage sampling and transmitting module (1-11) is connected to the processor (1-5) through the first A / D module (1-31), and the temperature sampling and transmitting module (1-12) is connected to the processor (1-5) through the second A / D module (1-32). The first A / D module (1-31) and the second A / D module (1-32) are respectively connected to the power supply module (1-1) to obtain their respective working power.

4. The coded MOST switch module according to claim 1, characterized in that: The coded MOST switch module also includes a D / A module (1-30). The MOS core board drive circuit (1-9) is connected to the processor (1-5) through the D / A module (1-30). The D / A module (1-30) is connected to the power supply module (1-1) to obtain working power.

5. The coded MOST switch module according to claim 2, characterized in that: The coded MOST switch module also includes a module housing (1-0), pins D (1-6) and S (1-8), a processor (1-5), a power supply module (1-1), a carrier isolation module (1-4), a MOS switch core board (1-7), a MOS core board drive circuit (1-9), and a sampling module, all of which are mounted on a PCB board inside the module housing (1-0). Pins D (1-6) and S (1-8) are respectively located on a pair of sides of the module housing (1-0) and are respectively connected to the drain D and source S of the MOS switch core board (1-7). Pins K+, K1, and voltage sampling pin V are all located on one side of the module housing (1-0) and are located between pins D (1-6) and S (1-8). Pins D (1-6) and S (1-8) are both made of copper sheets, and pins K+, K-, and voltage sampling pin V are all plug-in pins.

6. The coded MOST switch module according to claim 1, characterized in that: The coded MOST switch module can be programmed with addresses.

7. An energy storage system, characterized in that, It includes multiple battery packs connected in series and a battery management system (BMS). Each battery pack includes one or more individual cells connected in parallel and at least one coded MOST switch module as described in any one of claims 1-6. Each coded MOST switch module is connected in series with an individual cell and is connected in parallel on the power / control bus via pins K+ and K-. Each coded MOST switch module has a unique address information programmed into it. The power / control bus is connected to the battery management system (BMS) and an external power source, respectively.

8. The energy storage system according to claim 7, characterized in that: The energy storage system also includes a power / bus mixer (1-14), through which the power / control bus is connected to the battery management system (BMS) and an external power source, respectively.

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