Electrical module and battery pack

Abstract

To provide an electrical module and a battery pack by which a transmission path for an analog signal between a battery acquisition unit and an analog front end is shortened, thus improving the precision of acquiring voltage and temperature.SOLUTION: An electrical module comprises a battery acquisition unit, a battery management unit and a battery monitoring unit. The battery acquisition unit acquires a voltage signal and / or a temperature signal of a battery cell group in the battery module. The battery monitoring unit comprises at least one analog front end, which can convert an analog signal of the battery module acquired by the battery acquisition unit into a digital signal, and the analog front end is in communication connection with the battery management unit. The battery monitoring unit is in direct plug-in connection with the battery acquisition unit. Thus, a transmission path for the analog signal between the battery acquisition unit and the analog front end is shortened, thus reducing interference to the transmission path, and improving the precision of acquiring voltage and temperature.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and specifically relates to an electrical module and a battery pack. Background Art

[0002] Battery packs usually use CCS (Cells Contact System, battery collection unit) to achieve the functions of series and parallel connection of battery cells at high voltage, battery temperature sampling, and battery cell voltage sampling. Sampling signals are transmitted via cables to a BMS (Battery Management System), processed into digital signals by an AFE (analog front end, i.e., battery sampling chip) module in the BMS, after which the BMS processes the digital signals. In this solution, an intermediate transmission cable needs to be provided between the CCS and the AFE. Current electrical architectures generally transfer analog signals collected from battery cells to the BMS via tens to hundreds of cables. Therefore, when the BMS is an integrated type and is located far from the CCS collection interface, the distance between the CCS and the AFE increases, which also increases the length of the intermediate transmission cable. This may affect the accuracy of collected voltage and temperature data due to long-distance transmission. Summary of the Invention Problem to be Solved by the Invention

[0003] The electrical module and battery pack provided in embodiments of the present invention can shorten the analog signal transmission path between the battery collection unit and the analog front end, and improve the collection accuracy of voltage and temperature. Means for Solving the Problem

[0004] In a first embodiment, an electrical module provided in an embodiment of the present invention includes a battery acquisition unit for acquiring voltage and / or temperature signals of a group of battery cells in a battery module, a battery management unit, and a battery monitoring unit which includes one or more analog front ends capable of converting analog signals of the battery module acquired by the battery acquisition unit into digital signals, the analog front ends being communicably connected to the battery management unit, and the battery monitoring unit being connected to the battery acquisition unit in a direct-insert manner.

[0005] In one embodiment, the battery monitoring unit and the battery collection unit are connected by a plug-in unit using a direct insertion method.

[0006] In one embodiment, the plug-in unit includes a plug and a socket, where one of the plug and the socket is installed in the battery collection unit, the other of the plug and the socket is installed in the battery monitoring unit, and the plug is inserted into the socket.

[0007] In one embodiment, the battery collection unit includes an integrated busbar installed on the battery module, the integrated busbar includes a holder installed on the battery module, a plurality of aluminum bars connected to two adjacent battery cells in the battery module, and a flexible circuit board assembly installed on the holder, comprising a circuit board and a plurality of temperature measuring units, wherein the plurality of temperature measuring units are electrically connected to the circuit board, the circuit board is connected to the aluminum bars by nickel sheets, and each of the plurality of temperature measuring units is installed on one of the aluminum bars, and the plug-in unit is installed between the circuit board and the battery monitoring unit.

[0008] In one embodiment, the battery monitoring unit includes a plurality of analog front-ends, and the plurality of analog front-ends can convert all of the voltage and / or temperature signals within a single battery module.

[0009] In one embodiment, the analog front end is connected to the battery management unit via a daisy-chain communication cable.

[0010] In one embodiment, the battery management unit is installed separately from the battery monitoring unit.

[0011] In one embodiment, the battery monitoring unit is installed on one side of the battery module in a first direction, and the battery management unit is installed on one side of the battery module in a second direction.

[0012] In one embodiment, a high-voltage control unit is further included, the high-voltage control unit being communicatively connected to the battery management unit via a daisy-chain communication cable for transmitting collected high-voltage circuit signals to the battery management unit.

[0013] In one embodiment, the electrical module further includes a battery disconnection unit, the battery disconnection unit being connected to the charging interface of a battery pack by a rigid copper bar, and / or the battery disconnection unit being connected to the discharge interface of a battery pack by a rigid copper bar, and / or the battery disconnection unit being connected to the accessory interface of a battery pack by a rigid copper bar.

[0014] In one embodiment, the battery disconnection unit includes a positive electrode tab and a negative electrode tab, wherein the positive electrode tab is connected to the positive terminal of the battery module by a first copper-aluminum composite bar, and the negative electrode tab is connected to the negative terminal of the battery module by a second copper-aluminum composite bar.

[0015] In one embodiment, the first copper-aluminum composite bar and the second copper-aluminum composite bar are both made by combining an aluminum bar and a copper bar, wherein the material of the aluminum bar is 1060 O-type aluminum, the material of the copper bar is a soft pure copper bar, and / or Both the first copper-aluminum composite bar and the second copper-aluminum composite bar are made by combining an aluminum bar and a copper bar, the aluminum bar being welded to the positive or negative terminal of the battery module, and the copper bar being bolted to the positive or negative tab of the battery shut-off unit.

[0016] In a second embodiment, the electrical pack provided in the embodiment of the present invention includes a battery module, a battery collection unit for collecting voltage and / or temperature signals of the battery module, and the electrical module electrically connected to the battery collection unit.

[0017] In one embodiment, the battery pack further includes a plurality of the battery modules connected in series, wherein the battery cutoff unit of the electrical module includes a master fuse, and the master fuse is connected in series between two adjacent battery modules.

[0018] In one embodiment, the battery pack includes a charging interface and a discharging interface, a discharge circuit is formed within the battery pack, and the discharge circuit passes sequentially through the positive electrode of the discharge interface, the discharge positive electrode of the battery cutoff unit, the master positive electrode relay of the battery cutoff unit, the battery input positive electrode of the battery cutoff unit, the total positive electrode of the battery module, the battery module, the master fuse of the battery cutoff unit, the battery module, the total negative electrode of the battery module, the battery input negative electrode of the battery cutoff unit, a current sensor, the master negative electrode relay of the battery cutoff unit, the discharge negative electrode of the battery cutoff unit, and the negative electrode of the discharge interface.

[0019] In one embodiment, the battery pack includes a charging interface and a discharging interface, a charging circuit is formed within the battery pack, and the charging circuit passes in order through the positive electrode of the charging interface, the charging positive electrode of the battery cutoff unit, the rapid charging relay of the battery cutoff unit, the master positive electrode relay of the battery cutoff unit, the battery input positive electrode of the battery cutoff unit, the total positive electrode of the battery module, the battery module, the master fuse of the battery cutoff unit, the battery module, the total negative electrode of the battery module, the battery input negative electrode of the battery cutoff unit, a current sensor, the master negative electrode relay of the battery cutoff unit, the discharging negative electrode of the battery cutoff unit, and the negative electrode of the charging interface. [Effects of the Invention]

[0020] In an embodiment of the present invention, the battery collection unit collects voltage and / or temperature signals from a battery module, at least one of the analog front-ends is installed in the battery monitoring unit, and the port of the battery monitoring unit is close to the collection interface of the battery collection unit, generally within 50 mm, so that the battery collection unit and the battery monitoring unit are connected in a direct-insert manner for communication, and the analog signals of voltage and temperature collected by the battery collection unit are transmitted to the battery monitoring unit, converted into digital signals by the analog front-end, and transmitted to the battery management unit. With this setup, the transmission path of analog signals between the battery collection unit and the analog front-end is shortened, thereby reducing interference in the transmission path and improving the accuracy of voltage and temperature collection.

[0021] To more clearly explain the technical concepts in the embodiments of the present invention, the drawings necessary for describing the embodiments will be briefly described below. However, the drawings in the following description represent only a portion of the embodiments of the present invention, and it will be obvious to those skilled in the art that other drawings can be obtained based on these drawings without requiring any creative effort. [Brief explanation of the drawing]

[0022] [Figure 1] It is a schematic configuration diagram of a battery pack (electrical configuration layout) provided in an embodiment of the present invention. [Figure 2] It is a schematic configuration diagram of a battery pack provided in an embodiment of the present invention. [Figure 3] It is a block diagram of an electrical module provided in an embodiment of the present invention. [Figure 4] It is an enlarged schematic view of part A in Figure 2. [Figure 5] It is an enlarged schematic view of part B in Figure 2. [Figure 6] It is an electrical high-voltage conceptual diagram of a battery pack provided in an embodiment of the present invention. DETAILED DESCRIPTION OF EMBODIMENTS

[0023] Hereinafter, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments that can be conceived by those skilled in the art without creative efforts shall fall within the protection scope of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention. In the present invention, unless stated to the contrary, directional terms such as "upper" and "lower" generally refer to upper and lower when the device is actually used or operating, and in particular refer to the drawing orientation in the accompanying drawings, while "inner" and "outer" refer to the inner and outer relative to the contour of the device.

[0024] In the first embodiment, the present invention provides an electrical module 1. Figure 1 is a schematic diagram of the battery pack (electrical configuration layout) provided in the embodiment of the present invention. Figure 2 is a schematic diagram of the battery pack provided in the embodiment of the present invention. Figure 3 is a block diagram of the electrical module 1 provided in the embodiment of the present invention. Figure 4 is an enlarged schematic diagram of part A in Figure 2. Figure 5 is an enlarged schematic diagram of part B in Figure 2. Figure 6 is a conceptual diagram of the electrical high voltage of the battery pack provided in the embodiment of the present invention.

[0025] Referring to Figures 1-5, the electrical module 1 includes a battery collection unit 11, a battery management unit 12, and a battery monitoring unit 13. The battery collection unit 11 collects voltage signals and / or temperature signals from a group of battery cells 21 within the battery module 2. The battery monitoring unit 13 includes one or more analog front-ends capable of converting the analog signals from the battery module 2 collected by the battery collection unit 11 into digital signals, and the analog front-ends are communicatively connected to the battery management unit 12. The battery collection unit 11 is connected to the battery monitoring unit 13 in a direct-insert configuration.

[0026] In an embodiment of the present invention, a CCS (Cells Contact System, battery collection unit 11) collects voltage and / or temperature signals from a group of battery cells 21. At least one AFE (Analog front end) is installed in a CSC (Cell Supervision Circuit, battery monitoring unit 13). Since the collection interface of the battery collection unit 11 is close to the port of the battery monitoring unit 13, generally within 50 mm, the battery collection unit 11 and the battery monitoring unit 13 are directly connected for communication. The analog signals of voltage and / or temperature collected by the battery collection unit 11 are transmitted to the battery monitoring unit 13, where they are converted into digital signals by the analog front end and transmitted to the BMU (Battery Management Unit, battery management unit 12). With this setup, the transmission path for analog signals between the battery collection unit 11 and the analog front end is shortened, thereby reducing interference in the transmission path and improving the accuracy of voltage and temperature collection.

[0027] In one embodiment, the battery monitoring unit 13 and the battery collection unit 11 are connected by a plug-in unit 14 using a direct insertion method. In this way, the battery collection unit 11 and the electrical module 1 are arranged in an electrical architecture by direct insertion, the transmission distance of analog signals for voltage and temperature can be shortened, the use of transmission cables can be reduced, and the space utilization rate of the battery pack 100 can be improved.

[0028] The present invention does not limit the specific form of the plug-in unit 14. Referring further to Figure 4, in one embodiment, the plug-in unit 14 includes a plug 141 and a socket 142, where one of the plug 141 and the socket 142 is installed in the battery collection unit 11, and the other of the plug 141 and the socket 142 is installed in the battery monitoring unit 13, with the plug 141 being inserted into the socket 142. The plug 141 and the socket 142 enable a communicative connection between the battery collection unit 11 and the battery monitoring unit 13, thereby enabling an electrical architecture arrangement in which the battery collection unit 11 and the electrical module 1 are directly inserted, shortening the transmission distance of analog voltage and temperature signals, reducing the use of transmission cables, and improving the space utilization rate of the battery pack 100.

[0029] In one embodiment, the battery collection unit 11 includes an integrated busbar 111 installed on the battery module 2, the integrated busbar 111 includes a holder 1111 installed on a group of battery cells 21 of the battery module 2, a plurality of aluminum bars 1112 each connected to two adjacent battery cells in the group of battery cells 21, and a flexible circuit board assembly 1113 installed on the holder 1111 and including a circuit board 11131 and a plurality of temperature measuring units 11132, wherein the plurality of temperature measuring units 11132 are electrically connected to the circuit board 11131, the circuit board 11131 is connected to the aluminum bars 1112 by nickel sheets, and each of the plurality of temperature measuring units 11132 is installed on one of the aluminum bars 1112, the flexible circuit board assembly 1113 includes, and the plug-in unit 14 is installed between the circuit board 11131 and the battery monitoring unit 13. In other words, the integrated busbar 111 mainly consists of signal acquisition assemblies (FPC, PCB, FFC, etc.), plastic structural components, copper-aluminum bars, etc., which are connected together using techniques such as hot pressing / thermocompression bonding and riveting, enabling high-voltage series and parallel connection of battery cells, as well as battery temperature sampling and battery cell voltage sampling, while maintaining a simple structure.

[0030] In one embodiment, the material of the aluminum bar 1112 of the battery collection unit 11 is 1060 O-type aluminum.

[0031] The present invention does not limit the specific number of analog front-ends, and they can be selected based on the actual product. In one embodiment, the battery module 2 is composed of a plurality of 23-string battery cell groups, one 23-string battery cell group corresponds to one CSC battery monitoring unit 13, and within each CSC battery monitoring unit 13, a plurality of AFE analog front-ends are installed, each of the plurality of AFEs is capable of collecting 14-string voltages, and after each of the battery cell groups collects analog signals of voltage and temperature by the CSC battery collection unit 11, the analog signals can be transmitted to the plurality of AFE analog front-ends within the CSC, thereby realizing the function of the plurality of analog front-ends converting all of the voltage and / or temperature signals within a single battery module.

[0032] To further reduce cable usage, in one embodiment, the analog front end is connected to the battery management unit 12 via a daisy-chain communication cable. In other words, the analog voltage and temperature signals collected by the battery collection unit 11 are transmitted to the battery monitoring unit 13 via a direct insertion method, then converted to digital signals by the analog front end, and the digital signals are transmitted to the BMU via just two daisy-chain communication cables, thus reducing the number of transmission cables.

[0033] In the embodiment provided by the present invention, the battery management unit 12 is installed separately from the battery monitoring unit 13.

[0034] In one embodiment, the battery monitoring unit 13 is installed on one side of the battery module 2 in a first direction F1, and the battery management unit 12 is installed on one side of the battery module 2 in a second direction F2. By arranging the battery monitoring unit 13 on one side of the battery module 2 in a first direction F1, the extra space in the first direction F1 of the battery pack 100 can be effectively utilized without occupying space in the second direction F2 of the battery pack 100. As a result, the battery pack 100 can arrange more battery modules 2 in the second direction F2, thereby improving the space utilization rate of the battery pack 100 in the second direction F2.

[0035] In one embodiment, the electrical module 1 further includes a high-voltage control unit 15, which is communicatively connected to the battery management unit 12 by a daisy-chain communication cable in order to transmit collected high-voltage circuit signals to the battery management unit 12.

[0036] In the present invention, the electrical module 1 further includes a BDU (Battery Disconnect Unit 16).

[0037] In one embodiment, the battery disconnection unit 16 is connected to the charging interface 2a of the battery module 2 by a rigid copper bar.

[0038] In one embodiment, the battery cutoff unit 16 is connected to the discharge interface 2b of the battery module 2 by a rigid copper bar.

[0039] In one embodiment, the battery disconnection unit 16 is connected to the accessory interface 2c of the battery module 2 by a rigid copper bar.

[0040] Furthermore, the above three technical features can be installed individually, individually, or simultaneously. Specifically, the above three technical features are installed simultaneously, with the battery disconnection unit 16 connected to the charging interface 2a of the battery module 2 by a rigid copper bar, the battery disconnection unit 16 connected to the discharge interface 2b of the battery module 2 by a rigid copper bar, and the battery disconnection unit 16 connected to the accessory interface 2c of the battery module 2 by a rigid copper bar.

[0041] The battery disconnection unit 16 includes a positive electrode tab 16a and a negative electrode tab 16b, the positive electrode tab 16a being connected to the positive terminal of the battery module 2 by a first copper-aluminum composite bar 17, and the negative electrode tab 16b being connected to the negative terminal of the battery module 2 by a second copper-aluminum composite bar 18.

[0042] In the present invention, both the first copper-aluminum composite bar 17 and the second copper-aluminum composite bar 18 are made by combining an aluminum bar and a copper bar, the material of the aluminum bar is 1060 O-type aluminum, and the material of the copper bar is a soft pure copper bar.

[0043] In this invention, both the first copper-aluminum composite bar 17 and the second copper-aluminum composite bar 18 are made by combining an aluminum bar and a copper bar. The aluminum bar is welded to the positive or negative terminal of the battery module, and the copper bar is bolted to the positive tab 16a or negative tab 16b of the battery disconnection unit. In this way, output electrode holders are saved, the screw fastening process is saved, and production efficiency is improved. At the same time, a flexible copper bar is used for the copper bar, and it is bolted to the positive tab 16a and negative tab 16b of the BDU. The flexible copper bar can absorb assembly tolerances in the manufacturing process, making installation convenient, and the connection of the flexible copper bar can absorb tensile forces well during operation, thus avoiding the risk of high-voltage circuit disconnection or leakage due to tensile forces.

[0044] Furthermore, the two technical features mentioned above may be selected and installed individually, or they may be installed simultaneously.

[0045] Specifically, the battery cutoff unit 16 connects the charging interface 2a of the battery module 2 to a 20*3mm 2 Connected by a rigid copper bar, the battery cutoff unit 16 connects to the discharge interface 2b of the battery module 2 and a 20*3mm 2 The rigid copper bars are connected, and in the copper-aluminum composite bars, the positive and negative terminals of the battery module 2 are 25*4mm apart. 2 The positive terminal 16a and negative terminal 16b of the battery cutoff unit 16 are connected by an aluminum bar, and are 20*3mm 2 The battery cutoff unit 16 is connected by a soft copper bar to the accessory interface 2c of the battery module 2 and 6mm 2 It is connected by copper wire cables.

[0046] In a second embodiment, an embodiment of the present invention further provides a battery pack 100 including a battery module 2 and an electrical module 1. The electrical module 1 is the electrical module 1 described above, that is, the electrical module 1 has all the technical features of the electrical module 1 described above. In other words, the battery pack 100 includes all embodiments of the electrical module 1 described above and also has the beneficial effects brought about by all of the above embodiments. The battery collection unit 11 collects voltage signals and / or temperature signals from the battery cell group 21, and at least one analog front end is installed in the battery monitoring unit 13. Since the collection interface of the battery collection unit 11 is close to the port of the battery monitoring unit 13, generally within 50 mm, the battery collection unit 11 and the battery monitoring unit 13 are communicated between by the plug-in unit 14. The analog voltage and / or temperature signals collected by the battery collection unit 11 are transmitted to the battery monitoring unit 13 by the plug-in unit 14, then converted to digital signals by the analog front end and transmitted to the battery management unit 12. When installed in this manner, the transmission path for analog signals between the battery collection unit 11 and the analog front end is shortened, thereby reducing interference in the transmission path and improving the accuracy of voltage and temperature collection.

[0047] In one embodiment, the battery pack 100 further includes a plurality of the battery modules 2 connected in series, the battery cutoff unit 16 of the electrical module 1 includes a master fuse 161, the master fuse 161 is connected in series between two adjacent battery modules 2.

[0048] Based on the above embodiment, and referring to Figure 6, the high-voltage connection relationship of the battery pack 100 is as follows: It can be understood that the discharge circuit of the battery pack 100 is as follows: discharge interface 2b positive → BDU:P+ (discharge +) → BDU internal: master positive relay 162 → BDU:B+ (battery input +) → total battery positive → 1 / 2 battery module 2 → master fuse 161 → 1 / 2 battery module 2 → total battery negative → BDU:B- (battery input -) → current sensor 165 → master negative relay 163 → BDU:P&C- (charge / discharge -) → discharge interface 2b negative.

[0049] The charging circuit for battery pack 100 is as follows: positive terminal of charging interface 2a → BDU:C+ (charging +) → BDU internal: rapid charging relay 164 → BDU internal: master positive terminal relay 162 → BDU:B+ (battery input +) → total positive terminal of battery → 1 / 2 battery module 2 → master fuse 161 → 1 / 2 battery module 2 → total negative terminal of battery → BDU:B- (battery input -) → current sensor 165 → master negative terminal relay 163 → BDU:P&C- (charge / discharge -) → negative terminal of charging interface 2a. The accessory circuit is installed in parallel with the discharge interface 2b.

[0050] In conventional designs, the fuse is generally integrated into the BDU, and it is understood that the master fuse 161 can provide fuse protection if a short circuit occurs between the positive and negative terminals of the discharge interface 2b. However, if the short circuit occurs at the rear end of the fuse, for example between BDU B+ and BDU B-, the fuse is at the rear end of the short circuit. In this case, the current forms a circuit between the total positive terminal of the battery → battery module 2 → total negative terminal of the battery, and the current does not pass through the fuse. At this time, the fuse blows and the short-circuit current is interrupted, causing a dangerous high-voltage accident. In the present invention, since the master fuse 161 is connected in series between the two battery modules 2, the current path is total positive terminal of the battery → 1 / 2 battery module 2 → master fuse 161 → 1 / 2 battery module 2 → total negative terminal of the battery. The short-circuit current flows to the fuse, and when a short circuit occurs, the fuse blows and the current is interrupted, thereby effectively protecting not only the external short circuit of the battery pack 100 but also the internal short circuit of the battery pack 100.

[0051] Specifically, the two adjacent battery modules 2 are 25*4mm 2 It is connected by an aluminum bar, the material of which the aluminum bar is 1060 O-type aluminum.

[0052] Although embodiments of the present invention have been described in detail, the principles and embodiments of the present invention are described using specific examples, and the above description of embodiments is merely to aid in understanding the methods and core ideas of the present invention. Furthermore, those skilled in the art can modify specific embodiments and scope of application based on the ideas of the present invention, and therefore, the contents of this specification should not be interpreted as limitations of the present invention. [Explanation of symbols]

[0053] 100: Battery pack 1: Electrical module 11: Battery collection unit 111: Integrated busbar 1111: Holder 1112: Aluminum bar 1113: Flexible Circuit Board Assembly 11131: Circuit board 11132: Temperature measurement unit 12: Battery Management Unit 13: Battery Monitoring Unit 14: Plugin Unit 141: Plug 142: Socket 15: High-voltage control unit 16: Battery cutoff unit 161: Master Fuse 162: Master positive relay 163: Master Negative Relay 164: Rapid charging relay 165: Current sensor 17: First copper-aluminum composite bar 18: Second copper-aluminum composite bar 2: Battery module 2a: Charging interface 2b: Discharge interface 2c: Accessory Interface 21:Battery cell group F1: 1st direction F2:Second direction

Claims

1. It is an electrical module, A battery acquisition unit that collects voltage signals and / or temperature signals from a group of battery cells within a battery module, Battery management unit, A battery monitoring unit includes one or more analog front-ends capable of converting analog signals from the battery module collected by the battery collection unit into digital signals, wherein the analog front-ends are communicably connected to the battery management unit. The battery monitoring unit is connected to the battery collection unit by a direct insertion method. In the plane in which the battery cell group is arranged, the second direction is the direction in which the battery cell group is arranged, and the first direction is perpendicular to the second direction. The battery management unit is installed separately from the battery monitoring unit, the battery monitoring unit is installed on one side of the battery module in the first direction, and the battery management unit is installed on one side of the battery module in the second direction. An electrical module characterized by the following features.

2. The battery monitoring unit and the battery collection unit are connected by a plug-in unit using a direct insertion method. The electrical module according to feature 1.

3. The plug-in unit includes a plug and a socket, One of the plug and the socket is installed in the battery collection unit, and the other is installed in the battery monitoring unit. The plug is inserted into the socket. The electrical module according to feature 2.

4. The battery collection unit includes an integrated busbar installed on the battery module, The aforementioned integrated busbar, A holder installed on the aforementioned battery module, Multiple aluminum bars connected to two adjacent battery cells within the aforementioned battery module, A flexible circuit board assembly, installed in the holder, comprising a circuit board and a plurality of temperature measuring units, wherein the plurality of temperature measuring units are electrically connected to the circuit board, the circuit board is connected to the aluminum bar by a nickel sheet, and each of the plurality of temperature measuring units is installed on one of the aluminum bars, The plug-in unit is installed between the circuit board and the battery monitoring unit. The electrical module according to feature 2.

5. The battery monitoring unit includes a plurality of analog front ends, and the plurality of analog front ends can convert all of the voltage and / or temperature signals within a single battery module. The electrical module according to feature 1.

6. The analog front end is connected to the battery management unit via a daisy-chain communication cable, enabling communication between them. The electrical module according to feature 1.

7. Further includes a high-voltage control unit, The high-voltage control unit is connected to the battery management unit via a daisy-chain communication cable in order to transmit the collected high-voltage circuit signals to the battery management unit. The electrical module according to feature 1.

8. Further including a battery shut-off unit, The battery disconnection unit is connected to the battery pack's charging interface by a rigid copper bar, and / or The battery cutoff unit is connected to the discharge interface of the battery pack by a rigid copper bar, and / or The battery cutoff unit is connected to the battery pack's accessory interface by a rigid copper bar. The electrical module according to feature 1.

9. The battery disconnection unit includes a positive electrode tab and a negative electrode tab, The positive electrode tab is connected to the positive terminal of the battery module by a first copper-aluminum composite bar, and the negative electrode tab is connected to the negative terminal of the battery module by a second copper-aluminum composite bar. The electrical module according to feature 8.

10. The first copper-aluminum composite bar and the second copper-aluminum composite bar are both made by combining an aluminum bar and a copper bar, wherein the material of the aluminum bar is 1060O type aluminum, the material of the copper bar is soft pure copper bar, and / or The first copper-aluminum composite bar and the second copper-aluminum composite bar are both made by combining an aluminum bar and a copper bar, the aluminum bar being connected to the positive or negative terminal of the battery module by welding, and the copper bar being connected to the positive or negative tab of the battery shut-off unit by bolts. The electrical module according to feature 9.

11. It is a battery pack, A battery module and an electrical module according to any one of claims 1 to 10, A battery pack characterized by the following features.

12. The battery modules further include a plurality of the battery modules connected in series, The battery cutoff unit of the aforementioned electrical module includes a master fuse. The master fuse is connected in series between two adjacent battery modules. The battery pack according to feature 11.

13. Includes a charging interface and a discharging interface, A discharge circuit is formed inside the aforementioned battery pack. The discharge circuit passes through, in order, the positive electrode of the discharge interface, the positive discharge electrode of the battery cutoff unit, the master positive electrode relay of the battery cutoff unit, the positive battery input electrode of the battery cutoff unit, the total positive electrode of the battery module, the battery module, the master fuse of the battery cutoff unit, the battery module, the total negative electrode of the battery module, the negative battery input electrode of the battery cutoff unit, the current sensor, the master negative electrode relay of the battery cutoff unit, the negative discharge electrode of the battery cutoff unit, and the negative electrode of the discharge interface. The battery pack according to feature 12.

14. Includes a charging interface and a discharging interface, A charging circuit is formed inside the aforementioned battery pack. The charging circuit passes through, in order, the positive terminal of the charging interface, the positive charging terminal of the battery cutoff unit, the rapid charging relay of the battery cutoff unit, the master positive terminal relay of the battery cutoff unit, the positive battery input terminal of the battery cutoff unit, the total positive terminal of the battery module, the battery module, the master fuse of the battery cutoff unit, the battery module, the total negative terminal of the battery module, the negative battery input terminal of the battery cutoff unit, the current sensor, the master negative terminal relay of the battery cutoff unit, the negative discharge terminal of the battery cutoff unit, and the negative terminal of the charging interface. The battery pack according to feature 12.

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