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 more particularly to electrical modules and battery packs. [Background technology]

[0002] In a battery pack, a CCS (Cells Contact System, battery collection unit) is usually used to realize the functions of serial and parallel connection of battery cells at high voltage, as well as the functions of battery temperature sampling and voltage sampling of battery cells. Then, the sampling signal is sent to a BMS (Battery Management System) through a cable, and is processed into a digital signal by an AFE (analog front end, i.e., a battery sampling chip) module in the BMS. The BMS then processes the digital signal. This method requires the installation of an intermediate transmission cable between the CCS and the AFE. Current electrical architectures generally transfer analog signals collected from battery cells to the BMS through tens to hundreds of cables. Therefore, if the BMS is integrated and located far away from the CCS collection interface, the distance between the CCS and the AFE will be long, and the length of the intermediate transmission cable will also be increased. This may affect the accuracy of the 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 the embodiment of the present invention can shorten the transmission path of the analog signal between the battery collection unit and the analog front end, and improve the collection accuracy of the voltage and temperature. [Means for solving the problem]

[0004] In a first aspect, an electrical module provided in an embodiment of the present invention includes a battery collection unit that collects voltage signals and / or temperature signals of a group of battery cells in a battery module, a battery management unit, and a battery monitoring unit that includes one or more analog front ends that can convert the analog signals of the battery module collected by the battery collection unit into digital signals, the analog front ends being communicatively connected to the battery management unit, and the battery monitoring unit is connected to the battery collection unit in a direct insertion manner.

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

[0006] In one embodiment, the plug-in unit includes a plug and a socket, 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 bus bar installed on the battery module, the integrated bus bar including: a holder installed on the battery module; a plurality of aluminum bars each connected to two adjacent battery cells in the battery module; and a flexible circuit board assembly installed on the holder, the flexible circuit board assembly including a circuit board and a plurality of temperature measurement units, the plurality of temperature measurement units being electrically connected to the circuit board, the circuit board being connected to the aluminum bars by a nickel sheet, and each of the plurality of temperature measurement units being 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, a plurality of the analog front ends are included in the battery monitoring unit, and the plurality of the analog front ends can convert all the voltage signals and / or temperature signals in a single battery module.

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

[0010] In one embodiment, the battery management unit is located 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, the battery management unit further includes a high voltage control unit, 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 cut-off unit, wherein the battery cut-off unit is connected to the charging interface of the battery pack by a hard copper bar, and / or the battery cut-off unit is connected to the discharging interface of the battery pack by a hard copper bar, and / or the battery cut-off unit is connected to the accessory interface of the battery pack by a hard copper bar.

[0014] In one embodiment, the battery cut-off unit includes a positive tab and a negative tab, the positive tab being connected to the positive terminal of the battery module by a first copper-aluminum composite bar, and the negative tab being 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 formed by combining an aluminum bar and a copper bar, the material of the aluminum bar is 1060 O-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 formed by combining an aluminum bar and a copper bar, and the aluminum bar is connected to the positive electrode terminal or the negative electrode terminal of the battery module by welding, and the copper bar is connected to the positive electrode tab or the negative electrode tab of the battery cutoff unit by a bolt.

[0016] In a second aspect, an electric pack provided in an embodiment of the present invention includes a battery module, a battery collection unit for collecting a voltage signal and / or a temperature signal of the battery module, and the electric 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, and the battery cut-off 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, and a discharging circuit is formed within the battery pack, and the discharging circuit passes through the positive electrode of the discharging interface, the discharge positive electrode of the battery cut-off unit, the master positive relay of the battery cut-off unit, the battery input positive electrode of the battery cut-off unit, the total positive electrode of the battery modules, the battery modules, the master fuse of the battery cut-off unit, the battery modules, the total negative electrode of the battery modules, the battery input negative electrode of the battery cut-off unit, a current sensor, the master negative relay of the battery cut-off unit, the discharge negative electrode of the battery cut-off unit, and the negative electrode of the discharge interface in order.

[0019] In one embodiment, the battery pack includes a charging interface and a discharging interface, and a charging circuit is formed within the battery pack, and the charging circuit passes through the positive pole of the charging interface, the charging positive pole of the battery cut-off unit, the fast charging relay of the battery cut-off unit, the master positive relay of the battery cut-off unit, the battery input positive pole of the battery cut-off unit, the total positive pole of the battery modules, the battery module, the master fuse of the battery cut-off unit, the battery module, the total negative pole of the battery modules, the battery input negative pole of the battery cut-off unit, a current sensor, the master negative relay of the battery cut-off unit, the discharge negative pole of the battery cut-off unit, and the negative pole of the charging interface in order. Effect of the Invention

[0020] In an embodiment of the present invention, the battery collection unit collects the voltage signal and / or temperature signal of the battery module, and 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, typically within 50 mm, so that the battery collection unit and the battery monitoring unit are communicatively connected by a direct insertion method, and the analog signals of voltage and temperature collected by the battery collection unit are transmitted to the battery monitoring unit, and then converted to digital signals by the analog front-end and transmitted to the battery management unit. With this arrangement, the transmission path of the analog signals between the battery collection unit and the analog front-end is shortened, thereby reducing the interference of the transmission path and improving the collection accuracy of the voltage and temperature.

[0021] In order to more clearly explain the technical solutions in the embodiments of the present invention, the drawings necessary for the description of the embodiments will be briefly described below. However, the drawings in the following description are only a part of the embodiments of the present invention, and it is obvious to those skilled in the art that they can obtain other drawings based on these drawings without exerting creative efforts. [Brief description of the drawings]

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

[0023] Hereinafter, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, but it will be clear that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments that a person skilled in the art can think of without creative efforts are included in the protection scope of the present invention. Furthermore, it should be understood that the specific embodiments described in this specification are only for illustrating and explaining the present invention, and do not limit the present invention. In the present invention, directional terms such as "upper" and "lower", unless otherwise stated, usually mean upper and lower in the state in which the device is actually used or in operation, and in particular, the drawing direction of the drawing, and "inner" and "outer" are related to the contour of the device.

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

[0025] 1 to 5, the electric 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 of a battery cell group 21 in a battery module 2. The battery monitoring unit 13 includes one or more analog front ends capable of converting analog signals of 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 insertion manner.

[0026] In an embodiment of the present invention, a voltage signal and / or a temperature signal of a battery cell group 21 is collected by a CCS (Cells Contact System, battery collection unit 11), and at least one AFE (Analog front end, analog front end) is installed in a CSC (Cell Supervision Circuit, battery monitoring unit 13). The collection interface of the battery collection unit 11 is close to the port of the battery monitoring unit 13, typically within 50 mm, so that the battery collection unit 11 and the battery monitoring unit 13 are connected to be able to communicate with each other by direct insertion. The analog signal of voltage and / or temperature collected by the battery collection unit 11 is transmitted to the battery monitoring unit 13, and then converted to a digital signal by the analog front end and transmitted to a BMU (Battery Management Unit, battery management unit 12). With this arrangement, the transmission path of the analog signal between the battery collection unit 11 and the analog front end is shortened, thereby reducing the interference of the transmission path and improving the collection accuracy of the voltage and temperature.

[0027] In one embodiment, the battery monitoring unit 13 and the battery collection unit 11 are connected in a direct insertion manner by a plug-in unit 14. In this way, the battery collection unit 11 and the electrical module 1 realize an electrical architecture arrangement by direct insertion, which can shorten the transmission distance of the analog signals of voltage and temperature, reduce the use of transmission cables, and improve the space utilization rate of the battery pack 100.

[0028] The present application does not limit the specific form of the plug-in unit 14. Further referring to FIG. 4, in one embodiment, the plug-in unit 14 includes a plug 141 and a socket 142, one of the plug 141 and the socket 142 is installed in the battery collecting unit 11, the other of the plug 141 and the socket 142 is installed in the battery monitoring unit 13, and the plug 141 is inserted into the socket 142. The plug 141 and the socket 142 realize a communicative connection between the battery collecting unit 11 and the battery monitoring unit 13, thereby realizing an electrical architecture arrangement in which the battery collecting unit 11 and the electrical module 1 are directly inserted, which can shorten the transmission distance of analog signals of voltage and temperature, reduce the use of transmission cables, and improve the space utilization rate of the battery pack 100.

[0029] In one embodiment, the battery collection unit 11 includes an integrated bus bar 111 installed on the battery module 2, the integrated bus bar 111 including a holder 1111 installed on the battery cell group 21 of the battery module 2, a plurality of aluminum bars 1112 each connected to two adjacent battery cells in the battery cell group 21, and a flexible circuit board assembly 1113 installed on the holder 1111 and including a circuit board 11131 and a plurality of temperature measurement units 11132, wherein the plurality of temperature measurement units 11132 are electrically connected to the circuit board 11131, the circuit board 11131 is connected to the aluminum bar 1112 by a nickel sheet, and each of the plurality of temperature measurement units 11132 is installed on one of the aluminum bars 1112, and the plug-in unit 14 is installed between the circuit board 11131 and the battery monitoring unit 13. That is, the integrated bus bar 111 is mainly composed of a signal collection assembly (FPC, PCB, FFC, etc.), plastic structural parts, copper-aluminum bars, etc., which are connected together by techniques such as hot pressing / thermocompression bonding and riveting, thereby realizing the functions of series-parallel connection of battery cells at high voltage, battery temperature sampling, and battery cell voltage sampling, and has 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] In the present application, the specific number of the analog front ends is not limited, and 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 each of the CSC battery monitoring units 13 is provided with a plurality of AFE analog front ends, each of the plurality of AFEs can collect 14 string voltages, and each of the battery cell groups can collect voltage and temperature analog signals through the CCS battery collecting unit 11, and then the analog signals can be transmitted to the plurality of AFE analog front ends in the CSC, thereby realizing the function of converting all the voltage signals and / or temperature signals in the single battery module by the plurality of the analog front ends.

[0032] To further reduce the amount of cables used, in one embodiment, the analog front end is communicatively connected to the battery management unit 12 via a daisy-chain communication cable. That is, the analog signals of voltage and temperature collected by the battery collection unit 11 are transmitted to the battery monitoring unit 13 in a direct insertion manner, and then converted to digital signals by the analog front end, and the digital signals are transmitted to the BMU via 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 the first direction F1, and the battery management unit 12 is installed on one side of the battery module 2 in the second direction F2. By disposing the battery monitoring unit 13 on one side of the battery module 2 in the first direction F1, the extra space in the first direction F1 of the battery pack 100 can be effectively utilized, and the space in the second direction F2 of the battery pack 100 is not occupied, so that the battery pack 100 can dispose more battery modules 2 in the second direction F2, and the space utilization rate of the battery pack 100 in the second direction F2 can be improved.

[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 via a daisy chain communication cable for transmitting collected high voltage circuit signals to the battery management unit 12.

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

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

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

[0040] It should be noted that the above three technical features can be installed one by one, two by two, or simultaneously. Specifically, the above three technical features are installed simultaneously, and the battery cut-off unit 16 is connected to the charging interface 2a of the battery module 2 with a hard copper bar, the battery cut-off unit 16 is connected to the discharging interface 2b of the battery module 2 with a hard copper bar, and the battery cut-off unit 16 is connected to the accessory interface 2c of the battery module 2 with a hard copper bar.

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

[0042] In the present invention, the first copper-aluminum composite bar 17 and the second copper-aluminum composite bar 18 are both formed 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 the present invention, the first copper-aluminum composite bar 17 and the second copper-aluminum composite bar 18 are both formed by combining an aluminum bar and a copper bar, the aluminum bar is connected to the positive or negative terminal of the battery module by welding, and the copper bar is connected to the positive tab 16a or negative tab 16b of the battery cutoff unit by a bolt. In this way, the output electrode holder can be saved, the screw fastening process can be saved, and the production efficiency can be improved. At the same time, the copper bar adopts a soft copper bar and is connected to the positive tab 16a and the negative tab 16b of the BDU by a bolt, and the soft copper bar can absorb the assembly tolerance in the manufacturing process and is convenient to install, and at the same time, the connection of the soft copper bar can absorb the tensile force well during driving, and the risk of disconnection of the high voltage circuit or leakage caused by the tensile force can be avoided.

[0044] The above two technical features may be installed either individually or simultaneously.

[0045] Specifically, the battery cutoff unit 16 is connected to the charging interface 2a of the battery module 2 by a distance of 20*3 mm. 2 The battery cutoff unit 16 is connected to the discharge interface 2b of the battery module 2 by a hard copper bar of 20*3 mm. 2 The positive and negative terminals of the battery module 2 are connected by a hard copper bar of 25*4 mm. 2 The positive terminal 16a and the negative terminal 16b of the battery cutoff unit 16 are connected with an aluminum bar of 20*3mm. 2 The battery cutoff unit 16 is connected to the accessory interface 2c of the battery module 2 by a 6 mm soft copper bar. 2 The devices are connected with copper cables.

[0046] In a second aspect, the embodiment of the present invention further provides a battery pack 100 including a battery module 2 and an electric module 1. The electric module 1 is the electric module 1 described above, that is, the electric module 1 has all the technical features of the electric module 1 described above. That is, the battery pack 100 includes all the embodiments of the electric module 1 described above, and has the beneficial effects of all the embodiments described above. The battery collection unit 11 collects voltage signals and / or temperature signals of the battery cell group 21, and at least one analog front end is installed in the battery monitoring unit 13, and the collection interface of the battery collection unit 11 is close to the port of the battery monitoring unit 13, typically within 50 mm, so that the battery collection unit 11 and the battery monitoring unit 13 are communicatively connected by the plug-in unit 14, and the analog signal of voltage and / or temperature collected by the battery collection unit 11 is transmitted to the battery monitoring unit 13 by the plug-in unit 14, and then converted to a digital signal by the analog front end and transmitted to the battery management unit 12. Such an installation shortens the transmission path of the analog signal between the battery collection unit 11 and the analog front end, thereby reducing the interference on the transmission path and improving the collection accuracy of the voltage and temperature.

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

[0048] Based on the above embodiment, and referring to FIG. 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 electrode → BDU: P+ (discharge +) → inside BDU: master positive relay 162 → BDU: B+ (battery input +) → battery total positive electrode → 1 / 2 battery module 2 → master fuse 161 → 1 / 2 battery module 2 → battery total negative electrode → BDU: B- (battery input-) → current sensor 165 → master negative electrode relay 163 → BDU: P&C- (charge / discharge-) → discharge interface 2b negative electrode.

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

[0050] In the conventional design, the fuse is generally integrated with the BDU, and it can be understood that when a short circuit occurs between the positive electrode of the discharge interface 2b and the negative electrode of the discharge interface 2b, the master fuse 161 can provide fuse protection. However, if a 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, so at this time, a circuit is formed between the battery total positive electrode → battery module 2 → battery total negative electrode, and the current does not pass through the fuse. At this time, the fuse is blown and the short circuit current is cut off, which causes a dangerous high voltage accident. In the present invention, the master fuse 161 is connected in series between the two battery modules 2, so the current path is the battery total positive electrode → 1 / 2 battery module 2 → master fuse 161 → 1 / 2 battery module 2 → battery total negative electrode, and the short circuit current flows through the fuse, and when a short circuit occurs, the fuse melts and cuts off the current, which can effectively protect 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*4 mm 2 The aluminum bars are connected to each other, and the material of the aluminum bars is 1060 O-type aluminum.

[0052] Although the 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 the embodiments is merely intended to aid in the understanding of the method of the present invention and its core idea. In addition, a person skilled in the art can make modifications to the specific embodiments and application scope based on the idea of ​​the present invention, and as such, the contents of this specification should not be interpreted as limiting 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: Plug-in 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: Quick charge 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. 1. An electrical module comprising: a battery collection unit for collecting voltage signals and / or temperature signals of the battery cells in the battery module; A battery management unit; a battery monitoring unit including one or more analog front ends capable of converting analog signals of the battery modules collected by the battery collection unit into digital signals, the analog front ends being communicatively connected to the battery management unit; The battery monitoring unit is connected to the battery collection unit in a direct insertion manner; 1. An electrical module comprising:

2. The battery monitoring unit and the battery collection unit are connected by a plug-in unit in a direct insertion manner; 2. The electrical module of claim 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.

3. The electrical module according to claim 2.

4. the battery collection unit includes an integral bus bar mounted to the battery module; The integrated bus bar is A holder installed on the battery module; A plurality of aluminum bars each connected to two adjacent battery cells in the battery module; a flexible circuit board assembly mounted on the holder, the flexible circuit board assembly including a circuit board and a plurality of temperature measuring units, the plurality of temperature measuring units being electrically connected to the circuit board, the circuit board being connected to the aluminum bars by a nickel sheet, and each of the plurality of temperature measuring units being mounted on one of the aluminum bars; The plug-in unit is disposed between the circuit board and the battery monitoring unit.

3. The electrical module according to claim 2.

5. A plurality of the analog front ends are included in the battery monitoring unit, and the plurality of the analog front ends can convert all the voltage signals and / or temperature signals in a single battery module.

2. The electrical module of claim 1.

6. The analog front end is communicatively connected to the battery management unit via a daisy chain communication cable.

2. The electrical module of claim 1.

7. The battery management unit is installed separately from the battery monitoring unit.

2. The electrical module of claim 1.

8. The battery monitoring unit is installed on one side of the battery module in a first direction; The battery management unit is installed on one side of the battery module in the second direction.

8. The electrical module according to claim 7.

9. Further comprising a high voltage control unit; the high voltage control unit is communicatively connected to the battery management unit by a daisy chain communication cable to transmit the collected high voltage circuit signal to the battery management unit; 2. The electrical module of claim 1.

10. Further comprising a battery cutoff unit, The battery cut-off unit is connected to the charging interface of the battery pack by a hard copper bar; and / or The battery cut-off unit is connected to the discharge interface of the battery pack by a hard copper bar; and / or The battery cutoff unit is connected to the accessory interface of the battery pack by a hard copper bar; 2. The electrical module of claim 1.

11. the battery cutoff unit includes a positive tab and a negative tab; the positive electrode tab is connected to a positive terminal of the battery module with a first copper-aluminum composite bar, and the negative electrode tab is connected to a negative terminal of the battery module with a second copper-aluminum composite bar; 11. The electrical module of claim 10.

12. The first copper-aluminum composite bar and the second copper-aluminum composite bar are both formed 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 soft pure copper bar, and / or the first copper-aluminum composite bar and the second copper-aluminum composite bar are each formed by combining an aluminum bar and a copper bar, the aluminum bar is connected to a positive electrode terminal or a negative electrode terminal of the battery module by welding, and the copper bar is connected to a positive electrode tab or a negative electrode tab of the battery cutoff unit by a bolt; 12. The electrical module of claim 11.

13. A battery pack comprising: A battery module and an electrical module according to any one of claims 1 to 12. A battery pack characterized by:

14. Further comprising a plurality of the battery modules connected in series; the battery disconnect unit of the electrical module includes a master fuse; The master fuse is connected in series between two adjacent battery modules.

14. The battery pack according to claim 13.

15. Including a charging interface and a discharging interface; A discharge circuit is formed within the battery pack, the discharge circuit sequentially passes through the positive pole of the discharge interface, the discharge positive pole of the battery cut-off unit, the master positive relay of the battery cut-off unit, the battery input positive pole of the battery cut-off unit, the total positive pole of the battery module, the battery module, the master fuse of the battery cut-off unit, the battery module, the total negative pole of the battery module, the battery input negative pole of the battery cut-off unit, a current sensor, the master negative relay of the battery cut-off unit, the discharge negative pole of the battery cut-off unit, and the negative pole of the discharge interface; 15. The battery pack according to claim 14.

16. Including a charging interface and a discharging interface; A charging circuit is formed within the battery pack, the charging circuit sequentially passes through the positive pole of the charging interface, the charging positive pole of the battery cut-off unit, the quick charging relay of the battery cut-off unit, the master positive relay of the battery cut-off unit, the battery input positive pole of the battery cut-off unit, the total positive pole of the battery module, the battery module, the master fuse of the battery cut-off unit, the battery module, the total negative pole of the battery module, the battery input negative pole of the battery cut-off unit, a current sensor, the master negative relay of the battery cut-off unit, the discharge negative pole of the battery cut-off unit, and the negative pole of the charging interface; 15. The battery pack according to claim 14.

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