Battery assembly system

Abstract

The invention relates to the technical field of power batteries, in particular to a battery assembly system. The system comprises a battery module, a battery management assembly, a four-in-one controller and a carrier controller, the battery management assembly comprises a battery management module and a thermal management module and a temperature detection module which are arranged on the battery module, the four-in-one controller is connected with the battery module, and the battery module and the carrier controller are both connected with the battery management module. The battery management module is connected with the thermal management module and the temperature detection module. According to the method, when a battery system fault or a whole vehicle fault occurs or the whole vehicle has a serious fault, a VCU judges whether a current condition meets a high voltage lowering requirement or not, and when the current condition meets the high voltage lowering requirement, a power-off instruction is sent to a BMS; and after receiving the power-off instruction, the BMU disconnects the total negative relay and performs high-voltage power-off, so that the problem that the battery is damaged due to the fact that power-off cannot be performed in time is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a battery assembly system. Background Art

[0002] Power batteries refer to the power source that provides power for tools. They have the characteristics of high energy, high power, high energy density, and have the advantages of ultra-long life, safe use, and large capacity. Power batteries are the core components of new energy vehicles and an important direction for future energy transformation.

[0003] The power battery assembly system is mainly composed of four parts: power battery box, power battery pack, battery management system, and auxiliary components. The power battery assembly system is responsible for collecting battery voltage, temperature, SOC (remaining power) and other parameters, and uses these data to control the battery charging and discharging process to achieve battery protection and management.

[0004] The disadvantage of existing power battery assembly systems is that there is a lack of real-time monitoring of the battery status. When a system failure occurs, the power cannot be cut off in time, which easily causes battery overcharging, over-discharging, overloading, overheating and an increase in inconsistency problems, affecting the battery's performance, service life and even driving safety.

[0005] In order to be able to power off in time when a fault occurs to avoid battery damage, a battery assembly system is proposed. Summary of the invention

[0006] The object of the present invention is to provide a battery assembly system to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides a battery assembly system, including a battery module, a battery management assembly, a four-in-one controller and a vehicle controller, wherein the battery management assembly includes a battery management module and a thermal management module and a temperature detection module arranged on the battery module, the four-in-one controller is connected to the battery module, the battery module and the vehicle controller are both connected to the battery management module, and the battery management module is connected to the thermal management module and the temperature detection module;

[0008] The four-in-one controller and the vehicle controller are powered on to wake up the battery management module, and then the battery management module detects and controls the operation of the battery module in real time through the thermal management module and the temperature detection module.

[0009] As a further improvement of the technical solution, the four-in-one controller includes a pre-charge relay, two charging relays, a DCDC positive relay, and a liquid-cooled positive relay electrically connected to the battery management module, wherein:

[0010] One end of the pre-charge relay is connected to the fuse and connected to the discharge relay, the other end of the pre-charge relay is connected to the pre-charge resistor, the pre-charge resistor is connected to the discharge positive terminal 1, the discharge positive terminal 2 and connected to the LINK+ terminal, and one end of the fuse is connected to the PACK+ terminal;

[0011] The discharge relay is connected to the two charging relays, the DCDC positive relay, the liquid cooling positive relay and connected to the discharge positive 2 terminal and the LINK+ terminal;

[0012] One of the charging relays is connected to the charging positive terminal 1 and connected to the QC1+ terminal, and the other charging relay is connected to the charging positive terminal 2 and connected to the QC2+ terminal;

[0013] The DCDC positive relay is connected to the DCDC positive terminal;

[0014] The liquid cooling positive relay is connected to the liquid cooling positive terminal and to the WATER+ terminal.

[0015] As a further improvement of the technical solution, the battery module includes twelve main batteries and two backup batteries, and the thermal management module includes fans 1 and 2 arranged on the main batteries and the backup batteries, wherein:

[0016] The RD pin of the fan 1 is connected to the fan monitoring pin 1, the RD pin of the fan 2 is connected to the fan monitoring pin 2, and the 24V- pin of the fan 1 and the 24V- pin of the fan 2 are both connected to the 24V- terminal of the main battery or the backup battery;

[0017] The internal CANH pin on the main battery is connected to the internal CANH pin on other main batteries or the backup battery;

[0018] The internal CANL pin on the main battery is connected to the internal CANL pin on other main batteries or the backup battery;

[0019] The internal CAN1G pin on the main battery is connected to the internal CAN1G pin on the other main battery or the backup battery;

[0020] The BMU ignition pin on the main battery is connected to the BMU ignition pin on other main batteries or the backup battery;

[0021] The 24V terminal on the main battery is connected to the 24V terminal on the other main battery or the backup battery.

[0022] As a further improvement of the present technical solution, the battery management module includes a battery management chip and a thermal management chip and a discharge control circuit connected to the battery management chip. The battery management chip controls the battery module through the thermal management chip and the discharge control circuit.

[0023] As a further improvement of the technical solution, the battery management chip is electrically connected to the pre-charging relay, the two charging relays, the DCDC positive relay, and the liquid-cooling positive relay;

[0024] The CAN shield ground of the battery management chip is connected to the CAN1G pin of the main battery or the backup battery;

[0025] The internal CANL pin of the battery management chip is connected to the CANL pin of the main battery or the backup battery;

[0026] The internal CANH pin of the battery management chip is connected to the CANH pin of the main battery or the backup battery;

[0027] The BMU ignition pin of the battery management chip is connected to the BMU ignition pin on the main battery or the backup battery;

[0028] The 24V-terminal of the battery management chip is connected to the 24V-terminal of the main battery or the backup battery;

[0029] The battery management chip is connected to the CANH terminal, the CANL terminal and the CANG terminal of the vehicle controller.

[0030] As a further improvement of the technical solution, the liquid cooling enable control + pin of the thermal management chip is connected to the liquid cooling enable control + pin of the battery management chip;

[0031] The TMS-CANH pin of the thermal management chip is connected to the CANH terminal of the vehicle controller;

[0032] The TMS-CANL pin of the thermal management chip is connected to the CANL terminal of the vehicle controller;

[0033] The CANG pin of the thermal management chip is connected to the CANG terminal of the vehicle controller.

[0034] As a further improvement of the technical solution, the discharge control circuit includes a discharge negative relay and two charging negative relays electrically connected to the battery management chip, wherein:

[0035] One end of the charging negative relay is connected to the current sensor, the discharging negative relay, another charging negative relay, the PACK-discharging negative high-voltage detection pin of the battery management chip, and connected to the liquid cooling negative end and the DCDC negative end, and the other end is connected to the charging negative 1 end and the QC1- end;

[0036] Another charging negative relay is connected to the charging negative 2 terminal and to the QC2- terminal;

[0037] The discharge negative relay is connected to the LINK-discharge negative high voltage detection pin of the battery management chip and is connected to the discharge negative 1 terminal and the discharge negative 2 terminal.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] In this battery assembly system, when a battery system failure or a vehicle failure occurs, or when a serious vehicle failure occurs, the VCU determines whether the current conditions meet the high-voltage demand. When the high-voltage demand is met, it sends a power-off command to the BMS; after receiving the power-off command, the BMU disconnects the main negative relay and performs high-voltage power-off, thereby avoiding battery damage caused by failure to power off in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 It is a circuit diagram of a four-in-one controller of the present invention;

[0042] Figure 3 The circuit diagram of the battery module and thermal management module of the present invention;

[0043] Figure 4 The battery management chip circuit of the present invention Figure 1 ;

[0044] Figure 5 The battery management chip circuit of the present invention Figure 2 ;

[0045] Figure 6 The thermal management chip circuit diagram of the present invention;

[0046] Figure 7 It is a discharge control circuit diagram of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1-Figure 7As shown, the purpose of this embodiment is to provide a battery assembly system, including a battery module, a battery management assembly, a four-in-one controller and a vehicle controller, the battery management assembly includes a battery management module and a thermal management module and a temperature detection module arranged on the battery module, the four-in-one controller is connected to the battery module, the battery module and the vehicle controller are both connected to the battery management module, and the battery management module is connected to the thermal management module and the temperature detection module;

[0049] The four-in-one controller and the vehicle controller power on and wake up the battery management module, which then detects and controls the operation of the battery module in real time through the thermal management module and the temperature detection module.

[0050] Among them, the vehicle controller is determined according to the application scenario of the battery assembly system. For example, when the battery assembly system is applied to a vehicle, the vehicle controller is the vehicle controller.

[0051] Furthermore, the four-in-one controller includes a pre-charge relay, two charging relays, a DCDC positive relay, and a liquid-cooled positive relay electrically connected to the battery management module, wherein:

[0052] One end of the pre-charge relay is connected to the fuse and connected to the discharge relay, the other end of the pre-charge relay is connected to the pre-charge resistor, the pre-charge resistor is connected to the discharge positive terminal 1, the discharge positive terminal 2 and connected to the LINK+ terminal, and one end of the fuse is connected to the PACK+ terminal;

[0053] The discharge relay is connected to two charging relays, DCDC positive relay, liquid cooling positive relay and connected to discharge positive 2 terminal and LINK+ terminal;

[0054] A charging relay ( Figure 2 The charging relay (1) is connected to the positive charging terminal and the QC1+ terminal, and the other charging relay ( Figure 2 The middle charging 2 relay) is connected to the charging positive 2 terminal and to the QC2+ terminal;

[0055] DCDC positive relay is connected to DCDC positive terminal;

[0056] The liquid cooling positive relay is connected to the liquid cooling positive terminal and to the WATER+ terminal.

[0057] The battery module includes twelve main batteries and two backup batteries. The main battery is a 28S*16P battery box, and the backup battery is a 24S*16P battery box. The thermal management module includes fans 1 and 2 arranged on the main battery and the backup battery.

[0058] The RD pin of fan 1 is connected to the fan monitoring pin 1, the RD pin of fan 2 is connected to the fan monitoring pin 2, the 24V- pin of fan 1 and the 24V- pin of fan 2 are both connected to the 24V- terminal of the main battery or the backup battery;

[0059] The internal CANH pin on the main battery is connected to the internal CANH pin on other main batteries or backup batteries;

[0060] The internal CANL pin on the main battery is connected to the internal CANL pin on other main batteries or backup batteries;

[0061] The internal CAN1G pin on the main battery is connected to the internal CAN1G pin on other main batteries or backup batteries;

[0062] Connect the BMU ignition pin on the main battery to the BMU ignition pin on other main batteries or backup batteries;

[0063] The 24V- terminal on the main battery is connected to the 24V- terminal on other main batteries or backup batteries.

[0064] The battery management module includes a battery management chip and a thermal management chip and a discharge control circuit connected to the battery management chip. The battery management chip controls the battery module through the thermal management chip and the discharge control circuit.

[0065] The battery management chip is electrically connected to the pre-charge relay, two charging relays, the DCDC positive relay, and the liquid-cooled positive relay;

[0066] The CAN shield ground of the battery management chip is connected to the CAN1G pin of the main battery or backup battery;

[0067] The internal CANL pin of the battery management chip is connected to the CANL pin of the main battery or backup battery;

[0068] The internal CANH pin of the battery management chip is connected to the CANH pin of the main battery or backup battery;

[0069] The BMU ignition pin of the battery management chip is connected to the BMU ignition pin on the main battery or backup battery;

[0070] The 24V- terminal of the battery management chip is connected to the 24V- terminal on the main battery or the backup battery;

[0071] The battery management chip is connected to the CANH and CANL terminals of the vehicle controller and to the CANG terminal.

[0072] When the battery assembly system is applied to the vehicle, the vehicle needs to provide a stable 24V power supply to the BMS during driving, parking, fast charging, and on-board slow charging. The power must not be cut off when not under maintenance or long-term storage. The vehicle wakes up the battery management chip, i.e. BMS, through the ON gear signal and the charging wake-up signal. The external DC uses the wake-up pin "charging wake-up signal", the power CAN baud rate is 500K, and the vehicle CAN baud rate is 250.

[0073] The liquid cooling enable control + pin of the thermal management chip is connected to the liquid cooling enable control + pin of the battery management chip;

[0074] The TMS-CANH pin of the thermal management chip is connected to the CANH terminal of the vehicle controller;

[0075] The TMS-CANL pin of the thermal management chip is connected to the CANL end of the vehicle controller;

[0076] The CANG pin of the thermal management chip is connected to the CANG end of the vehicle controller.

[0077] The discharge control circuit includes a discharge negative relay electrically connected to the battery management chip and two charging negative relays, wherein:

[0078] A charging negative relay ( Figure 7 One end of the charging negative relay is connected to the current sensor, the discharge negative relay, and the other end of the charging negative relay ( Figure 7 The PACK-discharge negative high-voltage detection pin of the battery management chip is connected to the negative end of the liquid cooling and the negative end of the DCDC, and the other end is connected to the negative end of the charging 1 and the QC1-;

[0079] Another charging negative relay is connected to the charging negative 2 terminal and to the QC2- terminal;

[0080] The discharge negative relay is connected to the LINK-discharge negative high voltage detection pin of the battery management chip and to the discharge negative 1 terminal and the discharge negative 2 terminal.

[0081] The normal power-on and power-off control strategy of the power battery assembly system in this embodiment is that after the key ON signal disappears, the VCU first sends a power-off command to the four-in-one controller, and the VCU cuts off the enable of each accessory. After the VCU receives the shutdown status of each execution unit, it then cuts off the contactor (including the main motor relay); after the VCU receives the contactor disconnection status in the four-in-one high-voltage cabinet, it sends a power-off command to the BMS. (If the VCU does not receive the four-in-one relay disconnection status 6s after issuing the contactor disconnection command, the VCU directly controls the BMS to power off), and when the conditions are met, the BMS disconnects the total negative relay. After the total negative is disconnected, the VCU controls the motor to actively discharge. When the electronic control input voltage is lower than 60V or after 3s, the VCU defaults to high-voltage power-off completion; after the high-voltage power-off is completed, the VCU enables other accessories to power down to low voltage. After the low-voltage power-off of other accessories is completed, the VCU enters sleep.

[0082] When a battery system failure occurs or a serious failure occurs in the BMU, a power-off request is sent to the VCU; the VCU determines whether the current conditions meet the power-off requirements. If the power-off requirements are met, a power-off instruction is sent to the BMU (if there is no feedback from the SCU for more than 40 seconds, the BMU automatically reduces the high voltage); after receiving the power-off instruction, the BMU disconnects the main negative relay and performs high-voltage power-off.

[0083] When a vehicle failure occurs or a serious vehicle failure occurs, the VCU determines whether the current conditions meet the high-voltage demand. If the high-voltage demand is met, it sends a power-off command to the BMS. After receiving the power-off command, the BMU disconnects the main negative relay and performs high-voltage power-off, thereby avoiding battery damage caused by failure to power off in time.

[0084] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A battery assembly system, characterized in that: It includes a battery module, a battery management assembly, a four-in-one controller and a vehicle controller. The battery management assembly includes a battery management module and a thermal management module and a temperature detection module arranged on the battery module. The four-in-one controller is connected to the battery module. The battery module and the vehicle controller are both connected to the battery management module. The battery management module is connected to the thermal management module and the temperature detection module. The four-in-one controller and the vehicle controller are powered on to wake up the battery management module, and then the battery management module detects and controls the operation of the battery module in real time through the thermal management module and the temperature detection module.

2. The battery assembly system according to claim 1, characterized in that: The four-in-one controller includes a pre-charge relay, two charging relays, a DCDC positive relay, and a liquid-cooled positive relay electrically connected to the battery management module, wherein: One end of the pre-charge relay is connected to the fuse and connected to the discharge relay, the other end of the pre-charge relay is connected to the pre-charge resistor, the pre-charge resistor is connected to the discharge positive terminal 1, the discharge positive terminal 2 and connected to the LINK+ terminal, and one end of the fuse is connected to the PACK+ terminal; The discharge relay is connected to the two charging relays, the DCDC positive relay, the liquid cooling positive relay and connected to the discharge positive 2 terminal and the LINK+ terminal; One of the charging relays is connected to the charging positive terminal 1 and connected to the QC1+ terminal, and the other charging relay is connected to the charging positive terminal 2 and connected to the QC2+ terminal; The DCDC positive relay is connected to the DCDC positive terminal; The liquid cooling positive relay is connected to the liquid cooling positive terminal and to the WATER+ terminal.

3. The battery assembly system according to claim 2, characterized in that: The battery module includes twelve main batteries and two backup batteries, and the thermal management module includes fans 1 and 2 arranged on the main batteries and the backup batteries, wherein: The RD pin of the fan 1 is connected to the fan monitoring pin 1, the RD pin of the fan 2 is connected to the fan monitoring pin 2, and the 24V- pin of the fan 1 and the 24V- pin of the fan 2 are both connected to the 24V- terminal of the main battery or the backup battery; The internal CANH pin on the main battery is connected to the internal CANH pin on other main batteries or the backup battery; The internal CANL pin on the main battery is connected to the internal CANL pin on other main batteries or the backup battery; The internal CAN1G pin on the main battery is connected to the internal CAN1G pin on the other main battery or the backup battery; The BMU ignition pin on the main battery is connected to the BMU ignition pin on other main batteries or the backup battery; The 24V terminal on the main battery is connected to the 24V terminal on the other main battery or the backup battery.

4. The battery assembly system according to claim 3, characterized in that: The battery management module includes a battery management chip, a thermal management chip connected to the battery management chip, and a discharge control circuit. The battery management chip controls the battery module through the thermal management chip and the discharge control circuit.

5. The battery assembly system according to claim 4, characterized in that: The battery management chip is electrically connected to the pre-charging relay, the two charging relays, the DCDC positive relay, and the liquid-cooling positive relay; The CAN shield ground of the battery management chip is connected to the CAN1G pin of the main battery or the backup battery; The internal CANL pin of the battery management chip is connected to the CANL pin of the main battery or the backup battery; The internal CANH pin of the battery management chip is connected to the CANH pin of the main battery or the backup battery; The BMU ignition pin of the battery management chip is connected to the BMU ignition pin on the main battery or the backup battery; The 24V-terminal of the battery management chip is connected to the 24V-terminal of the main battery or the backup battery; The battery management chip is connected to the CANH terminal, the CANL terminal and the CANG terminal of the vehicle controller.

6. The battery assembly system according to claim 4, characterized in that: The liquid cooling enable control + pin of the thermal management chip is connected to the liquid cooling enable control + pin of the battery management chip; The TMS-CANH pin of the thermal management chip is connected to the CANH terminal of the vehicle controller; The TMS-CANL pin of the thermal management chip is connected to the CANL terminal of the vehicle controller; The CANG pin of the thermal management chip is connected to the CANG terminal of the vehicle controller.

7. The battery assembly system according to claim 4, characterized in that: The discharge control circuit includes a discharge negative relay and two charge negative relays electrically connected to the battery management chip, wherein: One end of the charging negative relay is connected to the current sensor, the discharging negative relay, another charging negative relay, the PACK-discharging negative high-voltage detection pin of the battery management chip, and connected to the liquid cooling negative end and the DCDC negative end, and the other end is connected to the charging negative 1 end and the QC1- end; Another charging negative relay is connected to the charging negative 2 terminal and to the QC2- terminal; The discharge negative relay is connected to the LINK-discharge negative high voltage detection pin of the battery management chip and is connected to the discharge negative 1 terminal and the discharge negative 2 terminal.

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