Battery system, integrated control device and new energy automobile

Abstract

The invention provides a battery system, and relates to the technical field of new energy automobiles, the battery system comprises a battery cell, an integrated power circuit and a first control circuit, the integrated power circuit is connected with the battery cell, and the integrated power circuit comprises an OBC module, a DCDC module and a PTC control circuit; the first control circuit is connected with the integrated power circuit and is connected with the battery cell, and the first control circuit is used for controlling the integrated power circuit. Based on the scheme, multiple parts of the new energy automobile can be integrated, the high-voltage electrical architecture is simplified, and the space occupied by the electrical system of the new energy automobile is reduced.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicles, and specifically relates to battery systems, integrated control devices, and new energy vehicles. Background Art

[0002] The high-voltage electrical architecture of new energy vehicles includes components such as power batteries, electric drives, positive temperature coefficient (PTC) resistors, compressors, DC-to-DC (DCDC) converters, AC charging systems, and DC charging systems. Moreover, the power consumption requirements of each component are different from each other, resulting in a very complex connection circuit between each component.

[0003] With the development of new energy vehicle technology, users' requirements for the overall vehicle comfort have gradually increased. Correspondingly, making the key components of the whole vehicle lightweight, miniaturized, and integrated has become an important topic in the technical field of new energy vehicles.

[0004] In view of this, how to integrate multiple components of new energy vehicles, simplify the high-voltage electrical architecture, and reduce the space occupied by the electrical system of new energy vehicles is an urgent problem to be solved. Summary of the Invention

[0005] Embodiments of this application provide a battery system, an integrated control device, and a new energy vehicle. Among them, the battery system integrates multiple components of the new energy vehicle, simplifies the high-voltage electrical architecture, and reduces the space occupied by the electrical system of the new energy vehicle.

[0006] In a first aspect, a battery system is provided, which is applied to a vehicle. The battery system includes: battery cells, an integrated power circuit, and a first control circuit. The integrated power circuit is connected to the battery cells. The integrated power circuit includes an on-board charger (OBC) module, a DCDC module, and a PTC control circuit. The first control circuit is connected to the integrated power circuit and is also connected to the battery cells. The first control circuit is used to control the integrated power circuit.

[0007] Exemplarily, there are multiple battery cells in the above battery system, and the multiple battery cells can form a battery or a battery pack.

[0008] Exemplarily, the above OBC module, DCDC module, and PTC control circuit can be integrated on one circuit board, or they can be not integrated on the same circuit board, but they need to be connected by lines to connect these three components and lead out a line to connect to the battery cells.

[0009] It should be understood that the above OBC module, DCDC module, and PTC control circuit can be located in the same package.

[0010] In addition, since the above OBC module, DCDC module, and PTC control circuit are interconnected to form an integrated power circuit and are directly connected to the battery cell through a single line, in this battery system, there is no need to separately distribute power to the OBC module, DCDC module, and PTC control circuit through a power distribution unit (PDU). Therefore, the deployment of the PDU can be eliminated in this battery system.

[0011] Based on the above technical solution, the battery system integrates the functions of the on-vehicle OBC, DCDC converter, and PTC components and forms an integrated power circuit, enabling the first control circuit, the integrated power circuit, and the battery cell (or a battery composed of multiple battery cells) to be in the same electrical system. Since the integrated power circuit can be directly connected to the battery cell, while ensuring that the lines drawn from the battery cell do not increase additionally, the original PDU component of the electrical system can be eliminated, thereby streamlining the electrical architecture of the new energy vehicle, reducing the volume occupied by the battery system, improving the vehicle integration, and reducing the manufacturing cost of the vehicle.

[0012] In combination with the first aspect, in some implementation manners of the first aspect, the first control circuit includes a main control chip, a power control chip, and a sampling chip. The main control chip is respectively connected to the power control chip and the sampling chip. Among them, the power control chip is connected to the integrated power circuit, and the sampling chip is respectively connected to the integrated power circuit and the battery cell. The main control chip is used to instruct the power control chip to control the integrated power circuit through commands and instruct the sampling chip to sample the integrated power circuit and / or the battery cell.

[0013] Exemplarily, the above main control chip can be a microcontroller unit (MCU) or an electronic control unit (ECU).

[0014] Exemplarily, the control function of the above main control chip can include controlling the OBC module, DCDC module, and PTC control circuit through commands, that is, power control. Based on this, it can be known that the main control chip can be mainly responsible for the communication between the OBC module, DCDC module, and PTC control circuit and external devices, as well as the control strategies inside and outside the battery system.

[0015] Exemplarily, the above main control chip can also control other low-voltage circuits connected to the battery system, such as a charging detection circuit, other auxiliary function circuits, etc.

[0016] Exemplarily, the above power control chip integrates a first power control chip for controlling the operating power of the OBC module, a second power control chip for controlling the operating power of the DCDC module, and a third power control chip for controlling the operating power of the PTC control circuit. That is, the above power control chip can be a multiplexing of the semiconductor control chips respectively controlled by the OBC module, the DCDC module, and the PTC control circuit, thereby improving the utilization rate of the chip.

[0017] Based on the above technical solution, the power control of the integrated power circuit and the parameter sampling of the integrated power circuit and the battery cell are realized through the first control circuit, thereby ensuring the normal and safe operation of the integrated power circuit and the battery cell.

[0018] Combined with the first aspect, in some implementation manners of the first aspect, the above battery system further includes: a first sampling circuit, which is connected between the power control chip and the integrated power circuit. The first sampling circuit is used to collect the first operating parameters of the integrated power circuit in real time, and the first operating parameters are used for the power control chip to perform closed-loop control on the integrated power circuit; a second sampling circuit, which is connected between the sampling chip and the battery cell, and the second sampling circuit is also connected between the sampling chip and the integrated power circuit. The second sampling circuit is used to collect the second operating parameters of the integrated power circuit and the battery cell, and the second operating parameters are used to determine whether the operating states of the integrated power circuit and the battery cell are normal.

[0019] Exemplarily, the above first operating parameters include parameters such as current and voltage when the integrated power circuit is operating. The first sampling circuit can transmit the collected first operating parameters to the power control chip, so that the power control chip determines whether the current integrated power circuit reaches the operating state indicated by the control instruction sent by the main control chip according to the control instruction sent by the main control chip and the first operating parameters of the integrated power circuit collected. If not, the power control chip will continue to regulate the operating state of the integrated power circuit until the integrated power circuit reaches the operating state indicated by the control instruction sent by the main control chip. Among them, the operating state indicated by the control instruction includes the operating power of the OBC module, the operating power of the DCDC module, and the operating power of the PTC control circuit, etc.

[0020] Exemplarily, the above second operating parameters include parameters regarding the health states of the integrated power circuit and the battery cell. For example, temperature, humidity, operating current, and operating voltage, etc. The second sampling circuit can output the collected second operating parameters, for example, display them on the human-machine interaction interface, so that external devices or users can maintain the battery system in a timely manner.

[0021] Based on the above technical solution, by integrating the first sampling circuit in the battery system, the closed-loop control of the first control circuit and the integrated power circuit can be achieved. By integrating the second sampling circuit in the battery system, the monitoring of the working states of the integrated power circuit and the battery cells can be realized, which helps to perform maintenance in a timely manner when an abnormality occurs in the integrated power circuit or the battery cells.

[0022] Combined with the first aspect, in some implementation manners of the first aspect, the above-mentioned main control chip also establishes a communication connection with a device deployed outside the battery system.

[0023] Based on the above technical solution, the communication and circuit control of the first control circuit inside and outside the battery system can be achieved.

[0024] Combined with the first aspect, in some implementation manners of the first aspect, the above-mentioned battery system further includes a box body, and the above-mentioned battery cells, the above-mentioned integrated power circuit and the above-mentioned first control circuit are accommodated in the box body.

[0025] Based on the above technical solution, by accommodating the battery cells, the integrated power circuit and the first control circuit in the box body, each component in the box body can be effectively protected, and by arranging the battery cells, the integrated power circuit and the first control circuit in the same package, the integration degree of the battery system can be more intuitively reflected, and the circuit complexity outside the battery system can be reduced.

[0026] Combined with the first aspect, in some implementation manners of the first aspect, the above-mentioned battery system further includes an AC charging socket, and the OBC module is also connected between the battery cells and the AC charging socket; the DCDC module is also connected to the low-voltage battery of the vehicle; the battery system further includes a thermal resistance wire, and the thermal resistance wire is connected to the PTC control circuit.

[0027] Based on the above technical solution, the battery system can not only achieve AC charging, but also achieve high-voltage DC power transmission and low-voltage DC power transmission. And the normal operation of the PTC function can be realized.

[0028] Combined with the first aspect, in some implementation manners of the first aspect, the above-mentioned battery system further includes a DC charging socket, and the battery cells are connected to the DC charging socket.

[0029] Based on the above technical solution, the battery system can not only achieve AC and DC charging, but also achieve high-voltage DC power transmission and low-voltage DC power transmission. And the normal operation of the PTC function can be realized.

[0030] Combined with the first aspect, in some implementation manners of the first aspect, the above-mentioned AC charging socket and the above-mentioned DC charging socket are integrated into the same integrated charging socket.

[0031] Based on the above technical solution, the battery system can not only achieve AC / DC charging, but also achieve high-voltage DC power transmission and low-voltage DC power transmission. And it can ensure the normal operation of the PTC function. In addition, since the AC charging socket and the DC charging socket are integrated, one less line can be led out from above the battery cells, thus further simplifying the circuit complexity of the electrical system.

[0032] Combined with the first aspect, in some implementation manners of the first aspect, the above integrated power circuit and the above first control circuit belong to an integrated control device, and the battery system further includes: a thermal management device, which includes: a first coolant circuit and a first pump, wherein the first pump is connected to the first coolant circuit, a first branch of the first coolant circuit passes through the integrated control device, a second branch of the first coolant circuit passes through a heating wire, a third branch of the first coolant circuit passes through the battery cells, and at least part of the first branch, the second branch, and the third branch of the first coolant circuit are accommodated in a box body.

[0033] Based on the above technical solution, a thermal management device is also integrated in the battery system to realize the function of directly cooling or heating the battery cells, which not only further increases the integration degree of the battery system, reduces the occupied space, and saves the manufacturing cost of the thermal management system, but also helps to increase the temperature regulation efficiency of the battery cells.

[0034] Combined with the first aspect, in some implementation manners of the first aspect, the above integrated power circuit and the above first control circuit belong to an integrated control device, and the battery system further includes: a thermal management device, which includes: a first coolant circuit, a second coolant circuit, a first pump, and a second pump, wherein the first pump is connected to a first branch of the first coolant circuit, a second branch of the first coolant circuit passes through a heating wire, a third branch of the first coolant circuit passes through the battery cells, and at least part of the first branch, the second branch, and the third branch of the first coolant circuit are accommodated in a box body; the second pump is connected to a first branch of the second coolant circuit, and at least part of the first branch of the second coolant circuit is accommodated in the box body.

[0035] Based on the above technical solution, considering the different heat requirements of the integrated control device and the battery cells, the coolant circuits of the integrated control device and the battery cells are decoupled to realize that the cooling and heating of the integrated control device and the battery cells do not affect each other.

[0036] In combination with the first aspect, in certain implementations of the first aspect, the above-mentioned thermal management device further includes an N-way valve, where N is an integer greater than or equal to 3. The first end of the N-way valve is docked with the first branch of the first coolant circuit, the second end of the N-way valve is docked with the second branch of the first coolant circuit, the third end of the N-way valve is docked with the third branch of the first coolant circuit, the N-way valve is also connected to the first control circuit, and the opening or closing of each valve of the N-way valve is controlled by the first control circuit.

[0037] Based on the above technical solution, by introducing the N-way valve, separate control of the cooling and heating of the integrated control device can be achieved, thereby ensuring that the heating or cooling of the integrated control device does not affect the operating temperature of the battery cells. Moreover, the architecture of this thermal management device is relatively simple and easy to implement.

[0038] In combination with the first aspect, in certain implementations of the first aspect, the above-mentioned thermal management device further includes a heat dissipation device, and the first branch of the first coolant circuit passes through the heat dissipation device.

[0039] Based on the above technical solution, by introducing a heat dissipation device into the thermal management device, the efficiency of cooling or heating can be increased, and the absorbed heat can also be utilized.

[0040] In combination with the first aspect, in certain implementations of the first aspect, the above-mentioned heat dissipation device is a radiator, a heat exchanger, a cooler or a refrigerator.

[0041] In a second aspect, an integrated control device is provided, which includes a power integrated circuit and a first control circuit. The power integrated circuit is connected to the battery cells in the vehicle battery system, and the power integrated circuit includes an OBC module, a DCDC module and a PTC control circuit; the first control circuit is connected to the power integrated circuit and is also connected to the battery cells, and the first control circuit is used to control the power integrated circuit.

[0042] Based on the above technical solution, by integrating the functions of the vehicle's OBC, DCDC converter and PTC components in the power integrated circuit, the first control circuit, the power integrated circuit and the battery cells (or the battery composed of multiple battery cells) can be located in the same electrical system. Since the power integrated circuit can be directly connected to the battery cells, while ensuring that the lines drawn from the battery cells do not increase additionally, the original PDU component of the electrical system can be cancelled, thereby streamlining the electrical architecture of new energy vehicles, reducing the volume occupied by the battery system, improving the vehicle integration, and reducing the manufacturing cost of the vehicle.

[0043] In combination with the second aspect, in some implementation manners of the second aspect, the above-mentioned first control circuit includes a main control chip, a power control chip, and a sampling chip. Among them, the main control chip is respectively connected to the power control chip and the sampling chip. The power control chip is connected to the integrated power circuit. The sampling chip is respectively connected to the integrated power circuit and the battery cell. The main control chip is used to instruct the power control chip to control the integrated power circuit through an instruction, and to instruct the sampling chip to sample the integrated power circuit and / or the battery cell.

[0044] In combination with the second aspect, in some implementation manners of the second aspect, the above-mentioned first control circuit also establishes a communication connection with a device deployed outside the battery system.

[0045] In a third aspect, a power battery is provided. The power battery includes: a box body, battery cells, an integrated power circuit, and a first control circuit. Among them, the battery cells, the integrated power circuit, and the first control circuit are accommodated in the box body. The integrated power circuit is connected to the battery cells. The integrated power circuit includes an OBC module, a DCDC module, and a PTC control circuit. The first control circuit is connected to the integrated power circuit and is also connected to the battery cells. The first control circuit is used to control the integrated power circuit.

[0046] Based on the above technical solution, the functions of the vehicle's OBC, DCDC converter, and PTC components are integrated through the integrated power circuit, enabling the first control circuit, the integrated power circuit, and the battery cells (or the battery composed of multiple battery cells) to be located in the same package. Since the integrated power circuit can be directly connected to the battery cells, while ensuring that the lines drawn from the battery cells do not increase additionally, the original PDU component of the electrical system can be cancelled, thereby streamlining the electrical architecture of new energy vehicles, reducing the volume occupied by the battery system, improving the vehicle integration, and reducing the manufacturing cost of the vehicle.

[0047] In combination with the third aspect, in some implementation manners of the third aspect, the above-mentioned first control circuit includes a main control chip, a power control chip, and a sampling chip. Among them, the main control chip is respectively connected to the power control chip and the sampling chip. The power control chip is connected to the integrated power circuit. The sampling chip is respectively connected to the integrated power circuit and the battery cells. The main control chip is used to instruct the power control chip to control the integrated power circuit through an instruction, and to instruct the sampling chip to sample the integrated power circuit and / or the battery cells.

[0048] In combination with the third aspect, in some implementation manners of the third aspect, the above-mentioned first control circuit also establishes a communication connection with a device deployed outside the battery system.

[0049] Fourthly, a new energy vehicle is provided, which includes a battery system in any one of the above first aspects, or the battery system of the new energy vehicle includes an integrated control device in any one of the above second aspects, or the new energy vehicle includes a power battery in any one of the above third aspects. Description of the Drawings

[0050] Figure 1 is a schematic diagram of a high-voltage electrical architecture 100 of a new energy vehicle;

[0051] Figure 2 is a schematic diagram of an architecture of a battery system 200 proposed in an embodiment of the present application;

[0052] Figure 3 is a schematic diagram of a box body 250 of a battery system 200 proposed in an embodiment of the present application;

[0053] Figure 4 is a schematic diagram of device connections of a battery system 200 proposed in an embodiment of the present application;

[0054] Figure 5 is a schematic diagram of device connections of another battery system 200 proposed in an embodiment of the present application;

[0055] Figure 6 is a schematic diagram of a box body 250 of another battery system 200 proposed in an embodiment of the present application;

[0056] Figure 7 is a partial schematic diagram of a thermal management system of a battery system 200 proposed in an embodiment of the present application;

[0057] Figure 8 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application;

[0058] Figure 9 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application;

[0059] Figure 10 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application;

[0060] Figure 11 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application;

[0061] Figure 12 is a schematic diagram of an integrated control device 280 proposed in an embodiment of the present application. Detailed Embodiments

[0062] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0063] It should be noted that in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B; herein, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0064] In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two, "at least one" and "one or more" mean one, two or more than two. The singular forms "a", "an", "the", "above-mentioned", "said", "this" are also intended to include expressions such as "one or more", unless there is a clear contrary indication in the context.

[0065] The reference to "one embodiment" or "some embodiments" etc. described in this specification means that in one or more embodiments of the present application, specific features, structures or characteristics described in connection with that embodiment are included. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprise", "include", "have" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0066] In the description of the embodiments of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "vertical", "horizontal", etc. is defined with respect to the orientation or position of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, which are used for description and clarification with respect to, rather than indicating or implying that the indicated device or component must have a specific orientation, or be constructed and operated in a specific orientation. It can change accordingly with the change of the orientation of the components shown in the accompanying drawings. Therefore, it cannot be construed as a limitation on the present application. In addition, the "vertical" involved in the present application is not strictly vertical, but within the allowable error range. The "parallel" is not strictly parallel, but within the allowable error range.

[0067] In the embodiments of the present application, the same reference numeral is used to represent the same component or the same part. For the same parts in the embodiments of the present application, only one of the parts or components may be marked with a reference numeral in the figure. It should be understood that the reference numerals are equally applicable to other identical parts or components. In addition, the parts in the figures are not drawn to scale, and the sizes and dimensions of the parts shown in the figures are only exemplary and should not be construed as a limitation to the present application.

[0068] For ease of understanding, the following provides explanations of the terms battery management system (BMS), OBC, DCDC converter, PTC, and PDU.

[0069] The BMS is a system for monitoring and managing batteries. By collecting parameters such as voltage, current, temperature, and state of charge (SOC) in real time, exchanging information with external devices (such as the vehicle controller), and performing calculations based on this information, it then controls the charging and discharging of the battery to address key issues such as safety, availability, usability, and service life in the lithium battery system, thereby improving the overall performance of the battery. The BMS is an important link connecting the in-vehicle power battery and new energy vehicles. Thus, the main functions of the BMS are to improve the utilization rate of the battery, prevent overcharging and over-discharging of the battery, extend the service life of the battery, and monitor the state of the battery.

[0070] The OBC is used to implement the AC charging function of new energy vehicles. The charging of new energy vehicles can be divided into two types: AC charging and DC charging. One is DC charging, where a DC charging pile directly charges the power battery. In this charging scenario, the OBC is not required. The other is AC charging. The AC charging pile supplies the current of single-phase or three-phase alternating current in the AC power grid to the OBC installed in the new energy vehicle. This OBC can convert the externally input alternating current into direct current to charge the new energy vehicle.

[0071] The DCDC converter is an electrical energy conversion circuit or electromechanical device that can convert a DC power supply into DC (or approximately DC) power supplies with different voltages. In other words, it can convert the DC power supply voltage of a certain value output by the power battery into a DC power supply voltage of another value, playing the role of regulating the power supply output and stabilizing the power supply voltage.

[0072] The PDU can be a power distribution socket. The PDU electrically connects high-voltage components through busbars and wiring harnesses, providing functions such as charge and discharge control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control for the high-voltage system of new energy vehicles, thereby protecting and monitoring the operation of the high-voltage system.

[0073] PTC generally refers to semiconductor materials or components with a very large positive temperature coefficient. In the embodiments of this application, PTC can be used to refer to a positive temperature coefficient thermistor, abbreviated as PTC resistor. The PTC resistor includes a PTC control circuit and a heating wire. The PTC resistor has the characteristic that its resistivity increases with the increase of temperature. In view of this characteristic, PTC can be used as a DC heater in new energy vehicles to adjust the operating temperature of the power battery of new energy vehicles, so as to ensure that the power battery works under constant temperature conditions, thereby playing a role in protecting the power battery.

[0074] At present, in the high-voltage electrical architecture of new energy vehicles, in addition to including main components such as power batteries and electric drives, it also includes other high-voltage components powered by the power battery, such as PTC resistors, compressors, DCDC converters, etc. In addition, the high-voltage electrical architecture of new energy vehicles usually also includes two charging systems, namely an AC charging system and a DC charging system. These two charging systems are used to charge the power battery. The AC charging system includes an AC charging socket and an OBC, and the DC charging system includes a DC charging socket and a DC charging relay.

[0075] It can be seen that there is basically a high-voltage electrical connection relationship between the power battery and all high-voltage components. However, considering factors such as the internal structure layout and safety of the power battery, the power battery cannot provide electrical interfaces for all high-voltage components. Therefore, a PDU needs to be introduced in the high-voltage electrical architecture to distribute power to each high-voltage component.

[0076] Figure 1 It is a schematic diagram of a high-voltage electrical architecture 100 of a new energy vehicle.

[0077] The power battery leads out 3 interfaces. Among them, interface 1 is used to connect with the front electric drive of the vehicle, interface 2 is used to connect with the DC charging system, and interface 3 is used to connect with the PDU.

[0078] Reference Figure 1 As shown, although the interfaces led out by the power battery are only 3, the interfaces led out by the PDU reach 5. Among them, interface 4 is used to connect with the compressor, interface 5 is used to connect with the PTC, interface 6 is used to connect with the integrated module of OBC and DCDC, interface 7 is used to connect with the rear electric drive, and interface 8 is used to connect with the power battery. Among them, the integrated module of OBC and DCDC is connected to the AC charging system through the PDU.

[0079] It can be seen that the high-voltage electrical architecture 100 includes a relatively large number of high-voltage components, and the wiring between the high-voltage components is also relatively many and complex, occupying a large storage space of the vehicle. With the development of new energy vehicle technology, users' requirements for the overall vehicle comfort are gradually increasing. Correspondingly, making the key components of the whole vehicle lightweight, miniaturized, and integrated has become an important issue for new energy vehicles.

[0080] In view of this, embodiments of the present application propose a battery system, an integrated control device, and a new energy vehicle. The battery system integrates some high-voltage components of the vehicle, and also integrates some thermal management components. Accordingly, the control architecture in the high-voltage electrical architecture is also integrated, thereby streamlining the high-voltage electrical architecture, improving the vehicle integration, and reducing the manufacturing cost of the vehicle.

[0081] It should be understood that the battery system, power battery, and integrated control device proposed in the embodiments of the present application are not limited to being applied in new energy vehicles, but can also be applied to other electrical equipment, such as industrial equipment, agricultural equipment, or entertainment equipment, etc. The new energy vehicle can include a driverless vehicle, and the new energy vehicle is a vehicle in a broad sense, which can be a means of transportation (such as commercial vehicles, passenger vehicles, motorcycles, flying vehicles, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawn mowers, harvesters, etc.), amusement equipment, toy vehicles, etc. Among them, the new energy vehicle, also known as an electric vehicle, as long as it is a means of transportation driven by a power battery, can belong to the concept scope of the new energy vehicle (or electric vehicle). However, for the convenience of description, the above means of transportation will be referred to as vehicles subsequently.

[0082] Figure 2 It is a schematic diagram of the architecture of a battery system 200 proposed in an embodiment of the present application. The battery system 200 can be applied to a vehicle.

[0083] The battery system 200 includes: a battery cell 210, an integrated power circuit 220, and a first control circuit 230;

[0084] Among them, the integrated power circuit 220 is connected to the battery cell 210, and the integrated power circuit 220 includes an OBC module 221, a DCDC module 222, and a PTC control circuit 223;

[0085] The first control circuit 230 is connected to the integrated power circuit 220 and is also connected to the battery cell 210. The first control circuit 230 is used to control the integrated power circuit 220.

[0086] In some possible embodiments, the battery system 200 may include a plurality of battery cells 210, and the plurality of battery cells 210 may form a battery or a battery pack. In the embodiments of the present application, only the battery cell 210 is taken as an example to illustrate the circuit connection, and the composition form and quantity of the battery cell 210 are not limited.

[0087] In some possible embodiments, the above-mentioned OBC module 221, DCDC module 222, and PTC control circuit 223 can be integrated on a circuit board, that is, the three independent components of OBC, DCDC, and PTC are integrated into one component, and are directly connected to the battery cell 210 through circuits on the circuit board. Alternatively, the above-mentioned OBC module 221, DCDC module 222, and PTC control circuit 223 may not be integrated on the same circuit board, but need to be connected by circuits to connect these three components, and a circuit is led out to be directly connected to the battery cell 210. It can be seen from this that these three components can be located in the same package.

[0088] In addition, since these three components can be directly connected to the battery cell 210 through circuits, in this system 200, there is no need to separately allocate power to the OBC, DCDC, and PTC through the PDU. The system 200 cancels the deployment of the PDU, which can simplify the system architecture and correspondingly simplify the circuit wiring related to the battery cell 210.

[0089] Based on the above technical solution, the battery system 200 integrates the functions of the OBC, DCDC converter, and PTC components of the whole vehicle and forms an integrated power circuit 220, so that the first control circuit 230, the integrated power circuit 220, and the battery cell 210 (or a battery composed of multiple battery cells) can be located in the same electrical system. Since the integrated power circuit 220 can be directly connected to the battery cell 210, while ensuring that the circuits led out from the battery cell 210 do not increase additionally, the original PDU component of the electrical system can be cancelled, thereby streamlining the electrical architecture of new energy vehicles, reducing the volume occupied by the battery system, improving the overall vehicle integration, and reducing the manufacturing cost of the whole vehicle.

[0090] In some possible embodiments, the above-mentioned first control circuit 230 includes a main control chip 231, a power control chip 232, and a sampling chip 233. Among them, the main control chip 231 is respectively connected to the power control chip 232 and the sampling chip 233, the power control chip 232 is connected to the integrated power circuit 220, and the sampling chip 233 is respectively connected to the integrated power circuit 220 and the battery cell 210. The main control chip 231 is used to instruct the power control chip 232 to control the integrated power circuit 220 through instructions, and to instruct the sampling chip 233 to sample the integrated power circuit 220 and / or the battery cell 210.

[0091] In some possible embodiments, the above-mentioned main control chip 231 may be a microcontroller unit (MCU) or an electronic control unit (ECU). When the above-mentioned OBC, DCDC converter, and PTC are independent components, each of the OBC, DCDC converter, and PTC requires a main control chip 231 for control. However, in the above-mentioned system 200, since the control functions of the three components, namely the OBC module 221, the DCDC module 222, and the PTC control circuit 223, are integrated in the integrated power circuit 220, the control function of the main control chip 231 in the system 200 may include controlling the OBC module 221, the DCDC module 222, and the PTC control circuit 223 through instructions, that is, power control. It can be seen from this that the main control chip 231 may be mainly responsible for the communication between the OBC module 221, the DCDC module 222, and the PTC control circuit 223 and external devices, as well as the control strategies inside and outside the battery system.

[0092] In some possible embodiments, the main control chip 231 may also control other low-voltage circuits connected to the system 200, such as a charging detection circuit, other auxiliary function circuits, etc.

[0093] Based on the above technical solution, the first control circuit 230 is used to achieve power control of the integrated power circuit 220 and parameter sampling of the integrated power circuit 220 and the battery cells, thereby ensuring the normal and safe operation of the integrated power circuit 220 and the battery cells.

[0094] In some possible embodiments, when the above-mentioned OBC module 221, DCDC module 222, and PTC control circuit 223 are in a normal working state, they need to obtain the working parameters of each module in real time, such as current, voltage, power, etc., so as to achieve power control of each module and ensure the normal and safe operation of each module. The power control chip 232 is used to control the operating power of the OBC module 221, DCDC module 222, and PTC control circuit 223. In addition, when each component in the battery system 200 is working, other real-time parameters of each component also need to be sampled, such as temperature, humidity, current, and voltage. Moreover, not only the above-mentioned OBC module 221, DCDC module 222, and PTC control circuit 223 need to be sampled for these parameters, but also the battery cells 210 need to be sampled for these parameters. The sampling chip 233 is used to sample the real-time parameters of the above-mentioned components.

[0095] In view of this, the above-mentioned battery system 200 further includes: a first sampling circuit 241, which is connected between the power control chip 232 and the integrated power circuit 220. The first sampling circuit 241 is used to collect the first operating parameters of the integrated power circuit 220 in real time, and the first operating parameters are used for the power control chip 232 to perform closed-loop control on the integrated power circuit 220; a second sampling circuit 242, which is connected between the sampling chip 233 and the battery cell, and the second sampling circuit 242 is also connected between the sampling chip 233 and the integrated power circuit 220. The second sampling circuit 242 is used to collect the second operating parameters of the integrated power circuit 220 and the battery cell, and the second operating parameters are used to determine whether the operating states of the integrated power circuit 220 and the battery cell are normal.

[0096] In some possible embodiments, the above-mentioned first operating parameters include parameters such as the current and voltage of the integrated power circuit 220 during operation. The first sampling circuit 241 can transmit the collected first operating parameters to the power control chip 232, so that the power control chip 232 can determine whether the current integrated power circuit 220 reaches the operating state indicated by the control instruction sent by the main control chip 231 according to the control instruction sent by the main control chip 231 and the first operating parameters of the integrated power circuit 220 collected. If not, the power control chip 232 will continue to regulate the operating state of the integrated power circuit 220 until the integrated power circuit 220 reaches the operating state indicated by the control instruction of the main control chip 231.

[0097] Among them, the operating state indicated by the control instruction includes the operating power of the OBC module 221, the operating power of the DCDC module 222, and the operating power of the PTC control circuit 223, etc.

[0098] It should be understood that when the operating power of a certain module is 0 or approximately 0, it means that the functional module is not working or in standby.

[0099] In some possible embodiments, the above-mentioned second operating parameters include parameters regarding the health status of the integrated power circuit 220 and the battery cell 210, such as temperature, humidity, operating current, and operating voltage, etc. The second sampling circuit 242 can output the collected second operating parameters, such as displaying them on the human-machine interaction interface, so that external devices or users can maintain the battery system 200 in time.

[0100] Based on the above technical solution, by integrating the first sampling circuit 241 in the battery system 200, a closed-loop control between the first control circuit 230 and the integrated power circuit 220 can be achieved. By integrating the second sampling circuit 242 in the battery system 200, the monitoring of the operating states of the integrated power circuit 220 and the battery cells 210 can be realized, which helps to perform maintenance in a timely manner when an abnormality occurs in the integrated power circuit 220 or the battery cells 210.

[0101] In some possible embodiments, the above main control chip 231 may be obtained by integrating a first main control chip originally independent for controlling the OBC module 221 to execute functions, a second main control chip for controlling the DCDC module 222 to execute functions, and a third main control chip for controlling the PTC control circuit 223 to execute functions. The functions of the main control chip 231 include all the functions of the first main control chip, the second main control chip, and the third main control chip.

[0102] In some possible embodiments, the power control chip 232 integrates a first power control chip for controlling the operating power of the OBC module 221, a second power control chip for controlling the operating power of the DCDC module 222, and a third power control chip for controlling the operating power of the PTC control circuit 223.

[0103] It should be understood that the above power control chip 232 may be a multiplexing of semiconductor control chips respectively controlled by the OBC module 221, the DCDC module 222, and the PTC control circuit 223, so as to improve the utilization rate of the chips. Of course, the power control chip 232 formed by multiplexing these semiconductor control chips may be one or more. In the embodiments of the present application, the power control chip 232 is taken as an example of one for detailed description, and the number of the power control chips 232 is not limited.

[0104] It should be noted that although the above main control chip 231 and the power control chip 232 both play a role in function control, their working principles are different. Among them, the main control chip 231 is used to communicate with other components, determine the control strategy, and issue control instructions, so that the subordinate components can execute the control strategy determined by the main control chip 231 based on the control instructions. The power control chip 232 belongs to the subordinate component of the main control chip 231. The power control chip 232 is used to control the controlled objects (such as the OBC module 221, the DCDC module 222, and the PTC control circuit 223) based on the control instructions issued by the main control chip 231, so that the controlled objects can operate in the state indicated by the control strategy of the main control chip 231.

[0105] Based on the above technical solution, by reusing the main control chip 231 and the control chip of the OBC module 221, the DCDC module 222, and the PTC control circuit 223, multiple main control chips 231 and control chips are integrated to obtain the main control chip 231 and the power control chip 232 in the battery system 200. This can not only improve the utilization rate of the chips, compress costs, but also further reduce the number of chips in the battery system 200, thereby further increasing the integration degree of the battery system 200.

[0106] In some possible embodiments, the main control chip 231 also establishes a communication connection with a device deployed outside the battery system 200. Based on the above circuit connection method, the main control chip 231 can enable the OBC module 221, the DCDC module 222, and the PTC control circuit 223 inside to operate according to the control strategy determined by the main control chip 231, that is, to perform internal communication, and can also enable signaling and data interaction with devices outside the battery system 200, that is, to perform external communication.

[0107] Based on the above technical solution, the communication and circuit control inside and outside the battery system 200 of the first control circuit 230 can be realized.

[0108] In some possible embodiments, the battery system 200 further includes a box body 250, and the battery cells 210, the integrated power circuit 220, and the first control circuit 230 are accommodated in the box body 250.

[0109] In some possible embodiments, in the cell to chassis (CTC) technology or the cell to body (CTB) technology, the battery cells, the integrated power circuit 220, and the first control circuit 230 can also be arranged in the same storage space in the vehicle chassis or body to form a battery system, and this storage space can also be understood as a kind of box body.

[0110] Based on the above technical solution, accommodating the battery cells 210, the integrated power circuit 220, and the first control circuit 230 in the box body 250 can effectively protect each component in the box body 250, and setting the battery cells 210, the integrated power circuit 220, and the first control circuit 230 in the same package can more intuitively reflect the integration degree of the battery system 200 and reduce the circuit complexity outside the battery system 200.

[0111] Figure 3 It is a schematic diagram of the box body 250 of a battery system 200 proposed in an embodiment of the present application.

[0112] Reference Figure 3As shown, the main part of the battery system 200 is encapsulated in the box body 250, and there are 4 lines led out from the box body 250. These 4 lines can be respectively connected to the front electric drive, the rear electric drive, the AC charging socket 261, and the DC charging socket 262. It can be seen that the connection lines outside the box body 250 are simpler than those outside the box body 250 in the Figure 1 electrical system shown. It should be understood that the box body 250 also includes 4 holes for leading out these 4 lines.

[0113] Figure 4 is a schematic diagram of the device connection of a battery system 200 proposed in an embodiment of the present application.

[0114] Referring to Figure 4 shown, the battery system 200 further includes an AC charging socket 261. The OBC module 221 is also connected between the battery cell 210 and the AC charging socket 261; the DCDC module 222 is also connected to the low-voltage battery 2221 of the vehicle; the battery system 200 further includes a heating resistance wire 2231, and the heating resistance wire 2231 is connected to the PTC control circuit 223. In addition, the above battery system 200 further includes a DC charging socket 262, and the battery cell 210 is connected to the DC charging socket 262.

[0115] Exemplarily, the DC charging system can be connected to the battery cell 210 through the DC charging socket 262, and then charge the battery cell 210 with DC power.

[0116] Exemplarily, the AC charging system can be connected to the OBC module 221 through the AC charging socket 261, and the OBC module 221 is also connected to the battery cell 210, so that the alternating current transmitted to the OBC module 221 by the AC charging system is converted into direct current by the OBC module 221, and then the direct current is transmitted to the battery cell 210 to realize the function of AC charging the battery cell 210.

[0117] Figure 5 is another schematic diagram of the device connection of a battery system 200 proposed in an embodiment of the present application.

[0118] Referring to Figure 5 shown, the AC charging socket 261 and the DC charging socket 262 in the battery system 200 are integrated into the same integrated charging socket 263.

[0119] The above integrated charging socket 263 includes a DC charging socket 262 and a transfer socket 264. After the transfer socket 264 is connected to the DC charging socket 262, the DC charging socket 262 can be converted into an AC charging socket 261 for AC charging. It can be seen that through the integrated charging socket 263, both the DC charging system and the AC charging system can be connected.

[0120] Based on this, the above OBC module 221 is also connected between the battery cell and the integrated charging socket 263; the DCDC module 222 is also connected to the low-voltage battery 2221 of the vehicle; the battery system 200 further includes a heating resistance wire 2231, and the heating resistance wire 2231 is connected to the PTC control circuit 223. In addition, the battery cell is also connected to the integrated charging socket 263.

[0121] Exemplarily, when the adapter socket 264 of the integrated charging socket 263 is ineffective, the integrated charging socket 263 is in the state of a DC charging socket. Then, the DC charging system can directly charge the battery cell 210 through the integrated charging socket 263.

[0122] Exemplarily, when the adapter socket 264 of the integrated charging socket 263 is effective, the integrated charging socket 263 is in the state of an AC charging socket. Then, the AC charging system can indirectly charge the battery cell 210 through the integrated charging socket 263, that is, convert the AC power input by the AC charging system into DC power through the above OBC module 221, and then output the converted DC power to the battery cell 210.

[0123] Based on the above technical solutions, the battery system 200 can not only achieve AC / DC charging, but also achieve high-voltage DC power transmission and low-voltage DC power transmission.

[0124] Figure 6 It is a schematic diagram of the box body 250 of another battery system 200 proposed in the embodiment of the present application.

[0125] Reference Figure 3 As shown, the main part of the battery system 200 is encapsulated in the box body 250, and there are 3 lines led out from the box body 250. These 3 lines can be respectively connected to the front electric drive, the rear electric drive, and the integrated charging socket 263. It can be seen that the connection lines outside the box body 250 are further simplified compared with Figure 3 As shown in the connection lines outside the box body 250. It should be understood that the box body 250 further includes 3 holes for leading out these 3 lines.

[0126] In some possible embodiments, the above Figure 4 and Figure 5 The shown battery system 200 may further include a DC charging relay 265. For Figure 4 As shown in the circuit diagram, the DC charging relay 265 is connected between the above DC charging socket 262 and the above battery cell 210. For Figure 5 As shown in the circuit diagram, the DC charging relay 265 is connected between the above integrated charging socket 263 and the above battery cell 210. The DC charging relay 265 is used to control the on / off of the DC charging circuit during the DC charging process.

[0127] In some possible embodiments, the above-mentioned Figure 4 and Figure 5 the battery system 200 shown may further include a filter circuit 266, which is connected between the above-mentioned OBC module 221 and the battery cell 210. The filter circuit 266 is used in cooperation with the OBC module 221 and is configured to eliminate common-mode interference signals in the circuit.

[0128] It should be understood that equivalent replacement schemes for the circuit connections of each component in the above-mentioned battery system 200 are all within the protection scope of the embodiments of the present application, and are not limited to Figure 4 and Figure 5 the circuit connection scheme shown.

[0129] In some possible embodiments, the thermal resistance wire 2231 connected to the PTC control circuit 223 is also accommodated in the above-mentioned housing 250.

[0130] Based on the above technical solution, the thermal resistance wire 2231 and the battery cell 210 are located in the same package, enabling the thermal resistance wire 2231 to directly adjust the operating temperature of the battery cell 210, which helps to improve the adjustment efficiency of the PTC for the operating temperature of the battery cell 210.

[0131] In some possible embodiments, generally, the above-mentioned system 200 further needs to include other components to cooperate with the above-mentioned integrated power circuit 220 for operation, and these components include conventional components in the current high-voltage electrical architecture.

[0132] Exemplarily, these conventional components include a control and drive circuit 271, which is connected between the above-mentioned power control chip 232 and the integrated power circuit 220. The control and drive circuit 271 is configured to execute control instructions issued by the power control chip 232 to drive the OBC module 221, the DCDC module 222, or the PTC control circuit 223 to perform corresponding functions.

[0133] In some possible embodiments, the function of the above-mentioned control and drive circuit 271 may also be integrated in the power control chip 232, and the power control chip 232 directly drives the OBC module 221, the DCDC module 222, or the PTC control circuit 223 to perform corresponding functions.

[0134] Exemplarily, these conventional components further include a main relay 272, which is connected between the battery cell 210 and the above-mentioned filter circuit 266. The main relay 272 is configured to control the connection and disconnection between the battery cell 210 and the external high-voltage circuit.

[0135] Exemplarily, these conventional components further include an auxiliary power supply circuit 273, which is connected to the main control chip 231 of the first control circuit 230 described above. The auxiliary power supply circuit 273 is used to provide a suitable power supply for the first control circuit 230 and the integrated power circuit 220 to implement the control functions of the first control circuit 230 and the integrated power circuit 220.

[0136] Exemplarily, these conventional components further include a charging interface detection circuit 274 and other low-voltage auxiliary function circuits 275, and these circuits are all controlled by the main control chip 231 of the first control circuit 230 described above.

[0137] In some possible embodiments, the above system 200 may further integrate a battery thermal management system. For example, at least part of the battery thermal management system is integrated with the battery cell 210. For example, at least part of the battery thermal management system and the battery cell 210 may be disposed in the housing 250 of the battery system 200.

[0138] Figure 7 It is a partial schematic diagram of the thermal management system of a battery system 200 proposed in an embodiment of the present application.

[0139] For the convenience of description, in the embodiments of the present application, the device to which the above integrated power circuit 220 and the first control circuit 230 belong together is collectively referred to as an integrated control device 280.

[0140] The above system 200 further includes: a thermal management device 290, which includes: a first coolant circuit 291 and a first pump 292. Among them, the first pump 292 is connected to the first coolant circuit 291. The first branch 2911 of the first coolant circuit 291 passes through the integrated control device 280, the second branch 2912 of the first coolant circuit 291 passes through the heating wire 2231, the third branch 2913 of the first coolant circuit 291 passes through the battery cell, and at least part of the first branch 2911, the second branch 2912 and the third branch 2913 of the first coolant circuit 291 are accommodated in the housing 250.

[0141] It should be understood that the above thermal management device 290 is a part of the battery thermal management system.

[0142] The working principle of the above thermal management device 290 is as follows:

[0143] When the integrated control device 280 and the battery cell 210 need to be cooled, the PTC control circuit 223 of the integrated control device 280 does not work, the heating wire 2231 does not generate heat, and the coolant circulates in the first coolant circuit 291 driven by the first pump 292, passing through the integrated control device 280 and the battery cell 210, thereby cooling the integrated control device 280 and the battery cell 210.

[0144] When the battery cell 210 needs to be heated, the PTC control circuit 223 of the integrated control device 280 controls the heating wire 2231 to generate heat. Based on the drive of the first pump 292, the coolant circulates in the first coolant circuit 291, passing through the integrated control device 280, the heating wire 2231, and the battery cell 210. Thus, the heat dissipated by the heating wire 2231 is carried to the battery cell 210 through the first coolant circuit 291, thereby heating the battery cell 210.

[0145] Based on the above technical solution, the battery system 200 also integrates a thermal management device 290, which realizes the functions of directly cooling or heating the battery cell 210. This not only further increases the integration degree of the battery system 200, reduces the occupied space, and saves the manufacturing cost of the thermal management system, but also helps to increase the temperature regulation efficiency of the battery cell 210.

[0146] However, based on the above architecture, only the simultaneous heating or cooling of the integrated control device 280 and the battery cell 210 can be achieved. Usually, the heat requirements of the integrated control device 280 and the battery cell 210 are different. Considering that the operating temperature of the battery cell 210 is an important environmental indicator, it is necessary to ensure that the heating or cooling of the integrated control device 280 does not affect the operating temperature of the battery cell 210.

[0147] Figure 8 It is a partial schematic diagram of the thermal management system of another battery system 200 proposed in the embodiment of the present application.

[0148] In some possible embodiments, based on the Figure 4 shown thermal management device 290, the structure of the first coolant circuit 291 is adjusted. The branches corresponding to the integrated control device 280, the heating wire 2231, and the battery cell 210 are connected in parallel with each other. In addition, the thermal management device 290 further includes a first branch switch 01, a second branch switch 02, and a third branch switch 03. Among them, the first branch switch 01 corresponds to the first branch 2911, the second branch switch 02 corresponds to the second branch 2912, and the third branch switch 03 corresponds to the third branch 2913. These branch switches are respectively used to open and close the corresponding branches. When it is necessary to cool the integrated control device 280 alone, the first branch switch 01 is opened by the main control chip 231, and the other branch switches are closed; when it is necessary to cool the battery cell 210 alone, the first branch switch 01 and the third branch switch 03 are opened by the main control chip 231, and the other branch switches are closed; when it is necessary to heat the battery cell 210 alone, the first branch switch 01, the second branch switch 02, and the third branch switch 03 are opened by the main control chip 231.

[0149] However, based on the above Figure 5The shown system 200 can achieve separate thermal management of the integrated control device 280 and the battery cells 210. However, the main control chip 231 needs to control the first branch switch 01, the second branch switch 02, and the third branch switch 03 simultaneously, which increases the circuit complexity and also results in a relatively large workload for the main control chip 231 to control each switch in parallel. Considering that the integrated control device 280 is less affected by the working temperature, it is only necessary to ensure that the cooling of the integrated control device 280 (the integrated control device 280 generally has no heating requirement) does not affect the working temperature of the battery cells 210. Therefore, the thermal management of the system 200 can also be achieved through the following Figure 6 shown system 200.

[0150] Figure 9 It is a partial schematic diagram of the thermal management system of another battery system 200 proposed in the embodiment of the present application.

[0151] In some possible embodiments, the above Figure 7 shown thermal management device 290 further includes an N-way valve 294, where N is an integer greater than or equal to 3. The first end 2941 of the N-way valve 294 is docked with the first branch 2911 of the first coolant circuit 291, the second end 2942 of the N-way valve 294 is docked with the second branch 2912 of the first coolant circuit 291, the third end 2943 of the N-way valve 294 is docked with the third branch 2913 of the first coolant circuit 291. The N-way valve 294 is also connected to the first control circuit 230, and the opening or closing of each valve of the N-way valve 294 is controlled by the first control circuit 230.

[0152] In some possible embodiments, the above N-way valve 294 is connected to the main control chip 231 in the first control circuit 230.

[0153] In Figure 9 the shown example, the N-way valve 294 is a three-way valve. Of course, in the case where the first coolant circuit 291 further includes other branches, N can be adjusted to other values accordingly, for example, replaced with a four-way valve, a five-way valve, etc.

[0154] The working principle of the above thermal management device 290 is as follows (N = 3, and the N-way valve 294 is the three-way valve 294):

[0155] When the integrated control device 280 needs to be cooled, the PTC control circuit 223 of the integrated control device 280 does not work, the heating resistance wire 2231 does not generate heat, and the main control chip 231 of the integrated control device 280 controls the three-way valve 294 to open the first branch 2911 and the second branch 2912 of the first coolant circuit 291, and close the third branch 2913. The coolant circulates based on the drive of the first pump 292 and through the first branch 2911 and the second branch 2912 of the first coolant circuit 291. Thus, the heat of the integrated control device 280 can be absorbed by the coolant circulating in the first coolant circuit 291, so as to cool the integrated control device 280 alone without affecting the operating temperature of the battery cell 210.

[0156] When the battery cell 210 needs to be cooled, the PTC control circuit 223 of the integrated control device 280 does not work, the heating resistance wire 2231 does not generate heat, and the main control chip 231 of the integrated control device 280 controls the three-way valve 294 to open the first branch 2911 and the third branch 2913 of the first coolant circuit 291, and close the second branch 2912. The coolant circulates based on the drive of the first pump 292 and through the first branch 2911 and the third branch 2913 of the first coolant circuit 291. Thus, the heat of the integrated control device 280 and the battery cell 210 can be absorbed by the coolant circulating in the first coolant circuit 291, so as to cool the integrated control device 280 and the battery cell 210.

[0157] When the battery cell 210 needs to be heated, the PTC control circuit 223 of the integrated control device 280 works, the heating resistance wire 2231 generates heat, and the main control chip 231 of the integrated control device 280 controls the three-way valve 294 to open the first branch 2911 and the third branch 2913 of the first coolant circuit 291, and close the second branch 2912. The coolant circulates based on the drive of the first pump 292 and through the first branch 2911 and the third branch 2913 of the first coolant circuit 291, passing through the integrated control device 280 and the heating resistance wire 2231. Thus, the heat dissipated by the heating resistance wire 2231 can be carried through the first coolant circuit 291 to the integrated control device 280 and the battery cell 210, so as to heat the integrated control device 280 and the battery cell 210.

[0158] Based on the above technical solution, by introducing the N-way valve 294, separate control of the cooling and heating of the integrated control device 280 can be achieved, thus ensuring that the heating or cooling of the integrated control device 280 does not affect the operating temperature of the battery cell 210. Moreover, the architecture of the thermal management device 290 is relatively simple and easy to implement.

[0159] Figure 10 It is a partial schematic diagram of the thermal management system of another battery system 200 proposed in the embodiment of the present application.

[0160] Reference Figure 10 As shown, the thermal management device 290 further includes a heat dissipation device 295, and the first branch 2911 of the first coolant circuit 291 passes through the heat dissipation device 295.

[0161] In some possible embodiments, the heat dissipation device 295 is a radiator, a heat exchanger, a chiller, or a refrigerator.

[0162] It should be understood that based on the heat dissipation device 295, not only can the heat dissipation efficiency of the thermal management device 290 be increased, but also the dissipated heat can be applied to other objects, such as the cockpit.

[0163] When the integrated control device 280 needs to be cooled, or the battery cells 210 need to be cooled, the first coolant circuit 291 passes through the heat dissipation device 295, so that the heat carried by the coolant from the integrated control device 280, or the integrated control device 280 and the battery cells 210, is quickly released through the heat dissipation device 295, thereby increasing the cooling efficiency.

[0164] In addition, through the heat dissipation device 295, the heat carried by the coolant can also be purposefully released to the heated object, such as the cockpit, etc., so that while increasing the cooling efficiency, the heat can also be utilized to increase the energy utilization rate of the system.

[0165] In some possible embodiments, taking Figure 9 the example shown, if the ambient temperature where the vehicle is located is relatively low, the main control chip 231 can control all three valves of the three-way valve 294 to open, and the PTC control circuit 223 controls the heating wire 2231 to work, and then through the first coolant circuit 291, the heat of the integrated control device 280, the heating wire 2231, and the battery cells 210 is released to the cockpit, thereby increasing the efficiency of heating the cockpit.

[0166] Based on the above technical solution, by introducing the heat dissipation device 295 into the thermal management device 290, the cooling or heating efficiency can be increased, and the absorbed heat can also be utilized.

[0167] Figure 11 It is a partial schematic diagram of the thermal management system of another battery system 200 proposed in the embodiment of the present application.

[0168] The above-mentioned system 200 further includes: The thermal management device 290 includes: a first coolant circuit 291, a second coolant circuit 296, a first pump 292, and a second pump 297. The first pump 292 is connected to a first branch 2911 of the first coolant circuit 291. The second branch 2912 of the first coolant circuit 291 passes through the heating wire 2231. The third branch 2913 of the first coolant circuit 291 passes through the battery cells. At least a part of the first branch 2911, the second branch 2912, and the third branch 2913 of the first coolant circuit 291 are accommodated in the box 250. The second pump 297 is connected to a first branch 2961 of the second coolant circuit 296. At least a part of the first branch 2961 of the second coolant circuit 296 passes through the integrated control device 280 and is accommodated in the box 250.

[0169] It should be understood that the above-mentioned thermal management device 290 may also include an N-way valve 294. The function of the N-way valve 294 and the corresponding extended description are as described in the foregoing embodiments and will not be repeated here. In addition, Figure 11 The above-mentioned thermal management device 290 shown may also include a heat dissipation device 295. The function of the heat dissipation device 295 and the corresponding extended description are as described in the foregoing embodiments and will not be repeated here.

[0170] Based on the above technical solution, considering that the heat requirements of the integrated control device 280 and the battery cells 210 are different, the coolant circuits of the integrated control device 280 and the battery cells 210 are decoupled, so that the cooling and heating of the integrated control device 280 and the battery cells 210 do not affect each other.

[0171] It should be noted that in the above-mentioned embodiment, the components installed in the box 250 can be considered to be integrated in one device. Therefore, the device integrated in the box 250 can be called a power battery. This power battery integrates the above-mentioned battery cells 210 (usually including multiple battery cells), the integrated control device 280, and part of the thermal management device 290. This power battery is also a technical solution proposed in the embodiments of the present application. Since the components included in the power battery and their extensions are described in the corresponding embodiments of the battery system 200, reference can be made to the foregoing corresponding embodiments and will not be repeated here.

[0172] Based on the above technical solution, the box 250 houses the main components of the battery system 200 to form a power battery, and the power battery only needs to lead out 3 or 4 connection lines to the outside, simplifying the external wiring of the power battery.

[0173] Based on the above-mentioned system 200, the embodiments of the present application also propose an integrated control device 280.

[0174] Figure 12It is a schematic diagram of an integrated control device 280 proposed in an embodiment of the present application.

[0175] The integrated control device 280 includes: an integrated power circuit 220 and a first control circuit 230. The integrated power circuit 220 is connected to the battery cells in the vehicle battery system. The integrated power circuit 220 includes an OBC module 221, a DCDC module 222, and a PTC control circuit 223. The first control circuit 230 is connected to the integrated power circuit 220 and is also connected to the battery cells, and the first control circuit 230 is used to control the integrated power circuit 220.

[0176] It should be understood that the integrated power circuit 220 and the first control circuit 230 in the above-mentioned integrated control device 280 are the same as those in the aforementioned system 200. Therefore, for the relevant extended descriptions of the integrated power circuit 220 and the first control circuit 230 in the integrated control device 280, please refer to the corresponding embodiments above and will not be repeated here.

[0177] In addition, an embodiment of the present application also proposes a new energy vehicle, which includes any one of the battery systems 200 proposed in the foregoing embodiments, or includes any one of the power batteries proposed in the foregoing embodiments, or the battery system of the new energy vehicle includes any one of the integrated control devices 280 proposed in the foregoing embodiments.

[0178] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professionals can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the present application.

[0179] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be repeated here.

[0180] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0181] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0182] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0183] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application.

[0184] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery system, characterized in that: Applied to a vehicle, the battery system comprises: a battery cell, an integrated power circuit and a first control circuit, The integrated power circuit is connected to the battery cell, and the integrated power circuit includes an on-board charger OBC module, a DC-DC converter DCDC module and a positive temperature coefficient thermistor PTC control circuit; The first control circuit is connected to the integrated power circuit and to the battery cell, and the first control circuit is used to control the integrated power circuit.

2. The battery system according to claim 1, characterized in that: The first control circuit includes a main control chip, a power control chip and a sampling chip. The main control chip is connected to the power control chip and the sampling chip respectively, the power control chip is connected to the integrated power circuit, and the sampling chip is connected to the integrated power circuit and the battery cell respectively. The main control chip is used to instruct the power control chip to control the integrated power circuit through instructions, and to instruct the sampling chip to sample the integrated power circuit and / or the battery cell.

3. The battery system according to claim 2, characterized in that: The battery system further comprises: A first sampling circuit, wherein the first sampling circuit is connected between the power control chip and the integrated power circuit, and the first sampling circuit is used to collect a first operating parameter of the integrated power circuit in real time, and the first operating parameter is used by the power control chip to perform closed-loop control on the integrated power circuit; A second sampling circuit, wherein the second sampling circuit is connected between the sampling chip and the battery cell, and the second sampling circuit is also connected between the sampling chip and the integrated power circuit, and the second sampling circuit is used to collect second operating parameters of the integrated power circuit and the battery cell, and the second operating parameters are used to determine whether the operating states of the integrated power circuit and the battery cell are normal.

4. The battery system according to claim 2 or 3, characterized in that: The main control chip also establishes a communication connection with a device deployed outside the battery system.

5. The battery system according to any one of claims 1 to 4, characterized in that: The battery system further includes a box, in which the battery cell, the integrated power circuit and the first control circuit are accommodated.

6. The battery system according to claim 5, characterized in that: The battery system further includes an AC charging socket, and the OBC module is further connected between the battery cell and the AC charging socket; The DCDC module is also connected to the low-voltage battery of the vehicle; The battery system further comprises a thermal resistance wire connected to the PTC control circuit.

7. The battery system according to claim 6, characterized in that: The battery system further comprises a DC charging socket, and the battery cell is connected to the DC charging socket.

8. The battery system according to claim 7, characterized in that: The AC charging socket and the DC charging socket are integrated into the same integrated charging socket.

9. The battery system according to any one of claims 6 to 8, characterized in that: The integrated power circuit and the first control circuit belong to an integrated control device. The battery system further includes: a thermal management device, which includes: a first coolant circuit and a first pump. The first pump is connected to the first coolant circuit, the first branch of the first coolant circuit passes through the integrated control device, the second branch of the first coolant circuit passes through the thermal resistance wire, the third branch of the first coolant circuit passes through the battery cell, and at least part of the first branch of the first coolant circuit, the second branch, and the third branch are accommodated in the box.

10. The battery system according to any one of claims 6 to 8, characterized in that: The integrated power circuit and the first control circuit belong to an integrated control device. The battery system further includes: a thermal management device, which includes: a first coolant circuit, a second coolant circuit, a first pump and a second pump. The first pump is connected to the first branch of the first coolant circuit, the second branch of the first coolant circuit passes through the thermal resistance wire, the third branch of the first coolant circuit passes through the battery cell, and at least part of the first branch of the first coolant circuit, the second branch, and the third branch are accommodated in the box; The second pump is connected to a first branch of the second coolant circuit, the first branch of the second coolant circuit passes through the integrated control device, and at least a portion of the first branch of the second coolant circuit is accommodated in the housing.

11. The battery system according to claim 9 or 10, characterized in that: The thermal management device also includes an N-way valve, where N is an integer greater than or equal to 3, a first end of the N-way valve is connected to the first branch of the first coolant circuit, a second end of the N-way valve is connected to the second branch of the first coolant circuit, and a third end of the N-way valve is connected to the third branch of the first coolant circuit. The N-way valve is also connected to the first control circuit, and the opening or closing of each valve of the N-way valve is controlled by the first control circuit.

12. The battery system according to any one of claims 9 to 11, characterized in that: The thermal management device further comprises a heat sink, and the first branch of the first coolant circuit passes through the heat sink.

13. The battery system according to claim 12, characterized in that: The heat dissipation device is a radiator, a heat exchanger, a cooler or a refrigerator.

14. An integrated control device, characterized in that: The integrated control device comprises: an integrated power circuit and a first control circuit, The integrated power circuit is connected to the battery cell in the vehicle battery system, and the integrated power circuit includes an on-board charger OBC module, a DC-DC converter DCDC module and a positive temperature coefficient thermistor PTC control circuit; The first control circuit is connected to the integrated power circuit and to the battery cell, and the first control circuit is used to control the integrated power circuit.

15. The integrated control device according to claim 14, characterized in that: The first control circuit includes a main control chip, a power control chip and a sampling chip. The main control chip is connected to the power control chip and the sampling chip respectively, the power control chip is connected to the integrated power circuit, and the sampling chip is connected to the integrated power circuit and the battery cell respectively. The main control chip is used to instruct the power control chip to control the integrated power circuit through instructions, and to instruct the sampling chip to sample the integrated power circuit and / or the battery cell.

16. The integrated control device according to claim 14 or 15, characterized in that: The first control circuit also establishes a communication connection with a device disposed outside the battery system.

17. A new energy vehicle, characterized in that: The battery system comprises the battery system as claimed in any one of claims 1 to 13, or the battery system of the new energy vehicle comprises the integrated control device as claimed in any one of claims 14 to 16.

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