Battery system, integrated control apparatus, and new energy vehicle

Abstract

A battery system (200), comprising: a battery cell (210), an integrated power circuit (220) and a first control circuit (230), wherein the integrated power circuit is connected to the battery cell, and the integrated power circuit comprises an OBC module (221), a DCDC module (222) and a PTC control circuit (223); and the first control circuit is connected to both the integrated power circuit and the battery cell, and the first control circuit is used for controlling the integrated power circuit. Further provided are an integrated control apparatus and a new energy vehicle. The battery system can integrate a plurality of components of a new energy vehicle, thereby simplifying a high-voltage electrical architecture, and reducing a space occupied by an electrical system of the new energy vehicle.

Description

Battery systems, integrated control devices and new energy vehicles

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 7, 2024, with application number 202410261122.X and invention name “Battery system, integrated control device and new energy vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of new energy vehicle technology, and specifically to a battery system, an integrated control device, and a new energy vehicle. Background Art

[0003] The high-voltage electrical architecture of new energy vehicles includes components such as power batteries, electric drives, positive temperature coefficient (PTC) thermistors, compressors, DC-to-DC (DCDC) converters, AC charging systems, and DC charging systems. Furthermore, the power requirements of each component vary, resulting in very complex connection circuits between them.

[0004] With the development of new energy vehicle technology, users' requirements for vehicle comfort are gradually increasing. Accordingly, lightweighting, miniaturization and integration of key vehicle components have become important topics in the field of new energy vehicle technology.

[0005] 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

[0006] Embodiments of the present application provide a battery system, an integrated control device, and a new energy vehicle, wherein 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.

[0007] In a first aspect, a battery system is provided for use in a vehicle. The battery system includes: a battery cell, an integrated power circuit, and a first control circuit. The integrated power circuit is connected to the battery cell. 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 to the battery cell. The first control circuit is used to control the integrated power circuit.

[0008] For example, the battery system may include multiple battery cells, which may constitute a battery or a battery pack.

[0009] For example, the OBC module, DCDC module and PTC control circuit may be integrated on a circuit board, or may not be integrated on the same circuit board. However, these three components need to be connected through lines, and a line is drawn out to connect to the battery cell.

[0010] It should be understood that the above-mentioned OBC module, DCDC module and PTC control circuit can be located in the same package.

[0011] In addition, since the above-mentioned 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 line, in this battery system, there is no need to use a power distribution unit (PDU) to distribute power to the OBC module, DCDC module and PTC control circuit separately, so this battery system can eliminate the deployment of PDU.

[0012] Based on the above technical solution, the battery system integrates the functions of the vehicle's OBC, DCDC converter and PTC components, and forms an integrated power circuit, so that the first control circuit, the integrated power circuit and the battery cell (or a battery composed of multiple battery cells) can be located in the same electrical system. Since the integrated power circuit and the battery cell can be directly connected, while ensuring that the lines leading from the battery cell are not additionally increased, the original PDU components of the electrical system can also be eliminated, thereby streamlining the electrical architecture of the new energy vehicle, reducing the volume occupied by the battery system, improving the integration of the entire vehicle, and reducing the manufacturing cost of the entire vehicle.

[0013] In combination with the first aspect, in certain implementations 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 being connected to the power control chip and the sampling chip, respectively, wherein 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, and 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.

[0014] For example, the main control chip may be a microcontroller unit (MCU) or an electronic control unit (ECU).

[0015] For example, the main control chip's control functions can include controlling the OBC module, DCDC module, and PTC control circuit through instructions, i.e., power control. Based on this, it can be seen that the main control chip can be primarily responsible for communication between the OBC module, DCDC module, and PTC control circuit and external devices, as well as control strategies within and outside the battery system.

[0016] For example, the main control chip may also control other low-voltage circuits connected to the battery system, such as a charging detection circuit, other auxiliary function circuits, and the like.

[0017] For example, the 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 power control chip can be a reuse of the semiconductor control chips that respectively control the OBC module, the DCDC module, and the PTC control circuit, thereby improving the chip utilization.

[0018] 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.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the battery system further includes: a first sampling circuit, connected between the power control chip and the integrated power circuit, the first sampling circuit being used to collect first operating parameters of the integrated power circuit in real time, the first operating parameters being used by the power control chip to perform closed-loop control of the integrated power circuit; and a second sampling circuit, connected between the sampling chip and the battery cell, and further connected between the sampling chip and the integrated power circuit, the second sampling circuit being used to collect second operating parameters of the integrated power circuit and the battery cell, the second operating parameters being used to determine whether the operating status of the integrated power circuit and the battery cell is normal.

[0020] For example, the first operating parameters described above include parameters such as the current and voltage of the integrated power circuit during operation. The first sampling circuit can transmit the collected first operating parameters to the power control chip, so that the power control chip can determine whether the current integrated power circuit has reached the operating state indicated by the control instruction of the main control chip based on the control instruction sent by the main control chip and the collected first operating parameters of the integrated power circuit. 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 of the main control chip. 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.

[0021] For example, the second operating parameters include parameters related to the health status of the integrated power circuit and the battery cell, such as temperature, humidity, operating current, and operating voltage. The second sampling circuit can output the collected second operating parameters, for example, by displaying them on a human-computer interface, so that external equipment or users can promptly maintain the battery system.

[0022] Based on the above technical solution, by integrating the first sampling circuit into the battery system, closed-loop control of the first control circuit and the integrated power circuit can be achieved. By integrating the second sampling circuit into the battery system, the operating status of the integrated power circuit and the battery cells can be monitored, facilitating timely maintenance when an abnormality occurs in the integrated power circuit or the battery cells.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the main control chip further establishes a communication connection with a device deployed outside the battery system.

[0024] Based on the above technical solution, communication and circuit control of the first control circuit inside and outside the battery system can be achieved.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the battery system further includes a box, in which the battery cell, the integrated power circuit, and the first control circuit are accommodated.

[0026] Based on the above technical solution, the battery cells, integrated power circuit and first control circuit are housed in a box, which can effectively protect the various components in the box, and the battery cells, integrated power circuit and first control circuit are arranged in the same package, which can more intuitively reflect the integration of the battery system and reduce the circuit complexity outside the battery system.

[0027] In combination with the first aspect, in certain implementations of the first aspect, the above-mentioned battery system also includes an AC charging socket, and the OBC module is also connected between the battery cell and the AC charging socket; the DCDC module is also connected to the vehicle's low-voltage battery; the battery system also includes a thermal resistance wire, which is connected to the PTC control circuit.

[0028] Based on the above technical solution, the battery system can realize both AC charging and high-voltage DC transmission and low-voltage DC transmission, and can realize the normal operation of the PTC function.

[0029] In combination with the first aspect, in certain implementations of the first aspect, the battery system further includes a DC charging socket, and the battery cell is connected to the DC charging socket.

[0030] Based on the above technical solution, the battery system can realize both AC and DC charging, high-voltage DC transmission and low-voltage DC transmission, and can realize the normal operation of the PTC function.

[0031] In combination with the first aspect, in certain implementations of the first aspect, the AC charging socket and the DC charging socket are integrated into the same integrated charging socket.

[0032] Based on this technical solution, the battery system can support both AC and DC charging, as well as high-voltage and low-voltage DC transmission. It also ensures the proper functioning of the PTC function. Furthermore, because the AC and DC charging sockets are integrated, the number of wires leading from the battery cells can be reduced, further simplifying the circuit complexity of the electrical system.

[0033] In combination with the first aspect, in certain implementations of the first aspect, the above-mentioned integrated power circuit and the above-mentioned first control circuit belong to an integrated control device, and the above-mentioned battery system also 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, 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.

[0034] Based on the above technical solution, a thermal management device is also integrated into the battery system to realize the function of direct cooling or heating of the battery cells. This not only further increases the integration 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.

[0035] In combination with the first aspect, in certain implementations of the first aspect, the above-mentioned integrated power circuit and the above-mentioned first control circuit belong to an integrated control device, and the above-mentioned battery system also 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 the first branch of the first coolant circuit, the second branch of the first coolant circuit passes through a 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 the first branch of the second coolant circuit, the first branch of the second coolant circuit passes through the integrated control device, and at least part of the first branch of the second coolant circuit is accommodated in the box.

[0036] 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 achieve mutual cooling and heating without affecting each other.

[0037] In combination with the first aspect, in certain implementations of the first aspect, the above-mentioned thermal management device also includes an N-way valve, where N is an integer greater than or equal to 3, wherein the first end of the N-way valve is connected to the first branch of the first coolant circuit, the second end of the N-way valve is connected to the second branch of the first coolant circuit, and the 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.

[0038] Based on the above technical solution, by introducing an N-way valve, it is possible to achieve independent control of the cooling and heating of the integrated control device, thereby ensuring that the heating or cooling of the integrated control device does not affect the operating temperature of the battery cells. In addition, the architecture of this thermal management device is relatively simple and easy to implement.

[0039] In combination with the first aspect, in certain implementations of the first aspect, the thermal management device further includes a heat dissipation device, and the first branch of the first coolant circuit passes through the heat dissipation device.

[0040] Based on the above technical solution, by introducing a heat dissipation device into the thermal management device, the cooling or heating efficiency can be increased, and the absorbed heat can also be utilized.

[0041] In combination with the first aspect, in some implementations of the first aspect, the heat dissipation device is a radiator, a heat exchanger, a cooler, or a refrigerator.

[0042] In a second aspect, an integrated control device is provided, which includes: an integrated power circuit and a first control circuit, wherein the integrated power circuit is connected to the battery cell in the vehicle battery system, and 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 to the battery cell, and the first control circuit is used to control the integrated power circuit.

[0043] Based on the above technical solution, the functions of the OBC, DCDC converter and PTC components of the whole vehicle are integrated through the integrated power circuit, so that the first control circuit, the integrated power circuit and the battery cell (or a battery composed of multiple battery cells) can be located in the same electrical system. Since the integrated power circuit and the battery cell can be directly connected, while ensuring that the lines leading from the battery cell are not additionally increased, the original PDU components of the electrical system can also be eliminated, thereby streamlining the electrical architecture of the new energy vehicle, reducing the volume occupied by the battery system, improving the integration of the whole vehicle, and reducing the manufacturing cost of the whole vehicle.

[0044] In combination with the second aspect, in certain implementations of the second aspect, the above-mentioned first control circuit includes a main control chip, a power control chip and a sampling chip, wherein 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, and 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.

[0045] In combination with the second aspect, in certain implementations of the second aspect, the first control circuit further establishes a communication connection with a device deployed outside the battery system.

[0046] In a third aspect, a power battery is provided, comprising: a casing, a battery cell, an integrated power circuit and a first control circuit, wherein the battery cell, the integrated power circuit and the first control circuit are housed in the casing, the integrated power circuit is connected to the battery cell, the integrated power circuit comprises an OBC module, a DCDC module and a 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.

[0047] Based on the above technical solution, the functions of the OBC, DCDC converter and PTC components of the whole vehicle are integrated through the integrated power circuit, so that the first control circuit, the integrated power circuit and the battery cell (or a battery composed of multiple battery cells) can be located in the same package. Since the integrated power circuit and the battery cell can be directly connected, while ensuring that the lines leading from the battery cell are not additionally increased, the original PDU components of the electrical system can also be eliminated, thereby streamlining the electrical architecture of the new energy vehicle, reducing the volume occupied by the battery system, improving the integration of the whole vehicle, and reducing the manufacturing cost of the whole vehicle.

[0048] In combination with the third aspect, in certain implementations of the third aspect, the above-mentioned first control circuit includes a main control chip, a power control chip and a sampling chip, wherein 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, and 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.

[0049] In combination with the third aspect, in certain implementations of the third aspect, the first control circuit further establishes a communication connection with a device deployed outside the battery system.

[0050] In a fourth aspect, a new energy vehicle is provided, which includes a battery system as in any one of the first aspects above, or the battery system of the new energy vehicle includes an integrated control device as in any one of the second aspects above, or the new energy vehicle includes a power battery as in any one of the third aspects above. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] FIG1 is a schematic diagram of a high-voltage electrical architecture 100 of a new energy vehicle;

[0052] FIG2 is a schematic diagram of the architecture of a battery system 200 proposed in an embodiment of the present application;

[0053] FIG3 is a schematic diagram of a box 250 of a battery system 200 proposed in an embodiment of the present application;

[0054] FIG4 is a schematic diagram of device connections of a battery system 200 proposed in an embodiment of the present application;

[0055] FIG5 is a schematic diagram of device connections of another battery system 200 proposed in an embodiment of the present application;

[0056] FIG6 is a schematic diagram of a box 250 of another battery system 200 proposed in an embodiment of the present application;

[0057] FIG7 is a partial schematic diagram of a thermal management system of a battery system 200 proposed in an embodiment of the present application;

[0058] FIG8 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application;

[0059] FIG9 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application;

[0060] FIG10 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application;

[0061] FIG11 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application;

[0062] FIG12 is a schematic diagram of an integrated control device 280 proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0064] It should be noted that, in the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0065] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two, and "at least one" and "one or more" refer to one, two or more. The singular expressions "a", "a", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context.

[0066] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0067] In the description of the embodiments of the present application, the terms "up", "down", "left", "right", "inside", "outside", "vertical", "horizontal", etc. indicate orientations or positional relationships that are defined relative to the orientations or positions of the components schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts. They are used for relative descriptions and clarifications, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They may change accordingly according to changes in the orientation of the components placed in the accompanying drawings, and therefore cannot be understood as limitations on the present application. In addition, the "vertical" involved in the present application is not vertical in the strict sense, but is within the allowable error range. The "parallel" is not parallel in the strict sense, but is within the allowable error range.

[0068] In the embodiments of this application, the same reference numerals are used to represent the same components or parts. For identical parts in the embodiments of this application, only one of the parts or parts may be labeled with a reference numeral in the drawings as an example. It should be understood that the same reference numerals apply to the other identical parts or parts. In addition, the various parts in the drawings are not drawn to scale, and the sizes and dimensions of the parts shown in the drawings are only exemplary and should not be construed as limiting the present application.

[0069] For ease of understanding, the following definitions of battery management system (BMS), OBC, DCDC converter, PTC, and PDU are given.

[0070] BMS is a system that monitors and manages batteries. It collects parameters such as voltage, current, temperature, and state of charge (SOC) in real time, exchanges information with external devices (such as vehicle controllers), and performs calculations based on this information to control the charging and discharging of batteries. This solves key issues such as safety, availability, ease of use, and service life in lithium battery systems, thereby improving the overall performance of batteries. BMS is an important link between on-board power batteries and new energy vehicles. As can be seen, the main function of BMS is to improve battery utilization, prevent overcharging and over-discharging of batteries, extend battery service life, and monitor battery status.

[0071] The OBC is used to enable AC charging for new energy vehicles. New energy vehicle charging can be categorized into two types: AC charging and DC charging. DC charging uses a DC charging station to directly charge the power battery; in this scenario, an OBC is not required. AC charging uses an AC charging station to supply single-phase or three-phase AC power from the AC grid to the OBC installed in the new energy vehicle. The OBC converts the external AC power into DC power, thereby charging the new energy vehicle.

[0072] A DC-DC converter is a circuit or electromechanical device that converts electrical energy, meaning it can convert a DC power source into a DC (or near-DC) power source of a different voltage. In other words, it can convert a DC power voltage of a certain value, output by a power battery, into a DC power voltage of another value, regulating the power output and stabilizing the power voltage.

[0073] PDU can be a power distribution socket. PDU electrically connects high-voltage components through busbars and wiring harnesses, providing charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, low-voltage control and other functions for the high-voltage system of new energy vehicles, thereby protecting and monitoring the operation of the high-voltage system.

[0074] PTC generally refers to semiconductor materials or components with a large positive temperature coefficient. In the embodiments of this application, PTC can be used to refer to a positive temperature coefficient thermistor, or PTC resistor for short. This PTC resistor includes a PTC control circuit and a thermistor wire. PTC resistors have the characteristic that their resistivity increases with increasing temperature. Given this characteristic, PTCs can be used as DC heaters in new energy vehicles to regulate the operating temperature of their power batteries, ensuring that they operate at a constant temperature and thus protecting the batteries.

[0075] Currently, the high-voltage electrical architecture of new energy vehicles includes not only the power battery and electric drive, but also other high-voltage components powered by the power battery, such as PTC resistors, compressors, and DC-DC converters. Furthermore, the high-voltage electrical architecture of new energy vehicles typically includes two charging systems: 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, while the DC charging system includes a DC charging socket and a DC charging relay.

[0076] As can be seen from this, the power battery essentially requires a high-voltage electrical connection with all high-voltage components. However, considering the internal structure and safety factors of the power battery, the power battery cannot provide an electrical interface for all high-voltage components. Therefore, a PDU is required in the high-voltage electrical architecture to distribute power to each high-voltage component.

[0077] FIG1 is a schematic diagram of a high-voltage electrical architecture 100 of a new energy vehicle.

[0078] The power battery leads to three interfaces, among which interface 1 is used to connect to the front electric drive of the car, interface 2 is used to connect to the DC charging system, and interface 3 is used to connect to the PDU.

[0079] As shown in Figure 1, although there are only three interfaces connected to the power battery, there are five interfaces connected through the PDU. Interface 4 is used to connect to the compressor, interface 5 is used to connect to the PTC, interface 6 is used to connect to the OBC and DCDC integrated module, interface 7 is used to connect to the rear electric drive, and interface 8 is used to connect to the power battery. The OBC and DCDC integrated module is connected to the AC charging system through the PDU.

[0080] As can be seen, the high-voltage electrical architecture 100 includes numerous high-voltage components, and the wiring between these components is also numerous and complex, occupying a significant amount of storage space in the vehicle. With the development of new energy vehicle technology, user requirements for vehicle comfort are gradually increasing. Accordingly, lightweighting, miniaturizing, and integrating key vehicle components have become important issues for new energy vehicles.

[0081] In light 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 of the vehicle's high-voltage components, as well as some thermal management components. Accordingly, the control architecture within the high-voltage electrical architecture is also integrated, thereby streamlining the high-voltage electrical architecture, improving vehicle integration, and reducing vehicle manufacturing costs.

[0082] 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 use in new energy vehicles, but can also be applied to other electrical equipment, such as industrial equipment, agricultural equipment, or entertainment equipment. New energy vehicles may include unmanned vehicles, and new energy vehicles are vehicles in a broad sense, which can be vehicles (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as mowers, harvesters, etc.), amusement equipment, toy vehicles, etc. Among them, new energy vehicles, also known as electric vehicles, as long as they are vehicles driven by power batteries, can fall within the concept of new energy vehicles (or electric vehicles), but for the convenience of description, the above-mentioned vehicles will be referred to as vehicles in the following.

[0083] 2 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.

[0084] The battery system 200 includes: a battery cell 210, an integrated power circuit 220 and a first control circuit 230;

[0085] The integrated power circuit 220 is connected to the battery cell 210 and includes an OBC module 221, a DCDC module 222 and a PTC control circuit 223.

[0086] The first control circuit 230 is connected to the integrated power circuit 220 and the battery cell 210 . The first control circuit 230 is used to control the integrated power circuit 220 .

[0087] In some possible embodiments, the battery system 200 may include multiple battery cells 210, which may constitute a battery or battery pack. The present embodiment only uses the battery cell 210 as an example to illustrate circuit connections, and does not limit the configuration and quantity of the battery cell 210.

[0088] In some possible embodiments, the OBC module 221, DCDC module 222, and PTC control circuit 223 can be integrated on a single circuit board. That is, the three independent components of OBC, DCDC, and PTC are integrated into a single component, and directly connected to the battery cell 210 via a line on the circuit board. Alternatively, the OBC module 221, DCDC module 222, and PTC control circuit 223 may not be integrated on the same circuit board, but they need to be connected via a line to connect the three components, and a line is led out to directly connect to the battery cell 210. As can be seen, these three components can be located in the same package.

[0089] In addition, since these three components can be directly connected to the battery cell 210 through lines, in the system 200, there is no need to distribute power to OBC, DCDC and PTC separately through PDU. The system 200 eliminates the deployment of PDU, which can simplify the system architecture and correspondingly simplify the circuit wiring related to the battery cell 210.

[0090] Based on the above technical solution, the battery system 200 integrates the functions of the OBC, DCDC converter and PTC components of the entire 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 and the battery cell 210 can be directly connected, while ensuring that the lines leading from the battery cell 210 are not additionally increased, the original PDU components of the electrical system can also be eliminated, thereby streamlining the electrical architecture of the new energy vehicle, reducing the volume occupied by the battery system, improving the integration of the entire vehicle, and reducing the manufacturing cost of the entire vehicle.

[0091] In some possible embodiments, the first control circuit 230 includes a main control chip 231, a power control chip 232, and a sampling chip 233, wherein the main control chip 231 is connected to the power control chip 232 and the sampling chip 233, respectively, the power control chip 232 is connected to the integrated power circuit 220, and the sampling chip 233 is connected to the integrated power circuit 220 and the battery cell 210, respectively. 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.

[0092] In some possible embodiments, the main control chip 231 may be a microcontroller unit (MCU) or an electronic control unit (ECU). When the OBC, DCDC converter, and PTC are independent components, each requires a main control chip 231 for control. However, in the system 200, since the control functions of the three components, the OBC module 221, the DCDC module 222, and the PTC control circuit 223, are integrated into the integrated power circuit 220, the control functions 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, i.e., power control. Therefore, the main control chip 231 may be primarily responsible for communication between the OBC module 221, the DCDC module 222, and the PTC control circuit 223 and external devices, as well as control strategies within and outside the battery system.

[0093] 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, and the like.

[0094] Based on the above technical solution, the first control circuit 230 is used to control the power of the integrated power circuit 220 and sample the parameters of the integrated power circuit 220 and the battery cell, thereby ensuring the normal and safe operation of the integrated power circuit 220 and the battery cell.

[0095] In some possible embodiments, the OBC module 221, DCDC module 222, and PTC control circuit 223, under normal operating conditions, need to obtain real-time operating parameters of each module, such as current, voltage, and power, to implement power control of each module and ensure 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 operating, it is also necessary to sample other real-time parameters of each component, such as temperature, humidity, current, and voltage. These parameters need to be sampled not only for the OBC module 221, DCDC module 222, and PTC control circuit 223, but also for the battery cell 210. The sampling chip 233 is used to sample the real-time parameters of these components.

[0096] In view of this, the above-mentioned battery system 200 also 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 a first operating parameter of the integrated power circuit 220 in real time. The first operating parameter is used by the power control chip 232 to perform closed-loop control of 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 a second operating parameter of the integrated power circuit 220 and the battery cell. The second operating parameter is used to determine whether the working status of the integrated power circuit 220 and the battery cell is normal.

[0097] In some possible embodiments, the 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 integrated power circuit 220 has reached the operating state indicated by the control instruction of the main control chip 231 based on the control instruction sent by the main control chip 231 and the collected first operating parameters of the integrated power circuit 220. 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.

[0098] The working 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 .

[0099] It should be understood that when the operating power of a module is 0 or close to 0, it means that the functional module is not working or is in standby mode.

[0100] In some possible embodiments, the second operating parameters include parameters related to the health status of the integrated power circuit 220 and the battery cell 210, such as temperature, humidity, operating current, and operating voltage. The second sampling circuit 242 can output the collected second operating parameters, for example, by displaying them on a human-computer interaction interface, so that external equipment or users can promptly maintain the battery system 200.

[0101] Based on the above technical solution, by integrating the first sampling circuit 241 in the battery system 200, closed-loop control of 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 operating status of the integrated power circuit 220 and the battery cell 210 can be monitored, which helps to facilitate timely maintenance when an abnormality occurs in the integrated power circuit 220 or the battery cell 210.

[0102] In some possible embodiments, the above-mentioned main control chip 231 can be obtained by integrating together a first main control chip for controlling the execution function of the OBC module 221, a second main control chip for controlling the execution function of the DCDC module 222, and a third main control chip for controlling the execution function of the PTC control circuit 223, which are originally independent of each other. The functions of the main control chip 231 include all the functions of the first main control chip, the second main chip and the third main chip.

[0103] 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.

[0104] It should be understood that the power control chip 232 can be a reused semiconductor control chip that controls the OBC module 221, the DCDC module 222, and the PTC control circuit 223, thereby improving chip utilization. Of course, the power control chip 232 formed by reusing these semiconductor control chips can be one or more. However, the embodiment of the present application uses a single power control chip 232 as an example for detailed description, and the number of power control chips 232 is not limited.

[0105] It should be noted that although the main control chip 231 and the power control chip 232 both play a role in functional control, their operating principles are different. The main control chip 231 is used to communicate with other components and determine control strategies. It also issues control instructions so that lower-level components can execute the control strategies determined by the main control chip 231 based on the control instructions. The power control chip 232 is a lower-level 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 according to the state indicated by the control strategy of the main control chip 231.

[0106] 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 the control chips are integrated to obtain the main control chip 231 and the power control chip 232 in the above-mentioned battery system 200. This can not only improve the chip utilization rate and reduce costs, but also further reduce the number of chips in the battery system 200, thereby further increasing the integration of the battery system 200.

[0107] In some possible embodiments, the main control chip 231 further 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 instruct the internal OBC module 221, DCDC module 222, and PTC control circuit 223 to operate according to the control strategy determined by the main control chip 231, that is, perform internal communication, and can also perform signaling and data interaction with devices outside the battery system 200, that is, perform external communication.

[0108] Based on the above technical solution, communication and circuit control of the first control circuit 230 inside and outside the battery system 200 can be achieved.

[0109] In some possible embodiments, the battery system 200 further includes a box 250 , in which the battery cells 210 , the integrated power circuit 220 and the first control circuit 230 are accommodated.

[0110] 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 may also be arranged in the same storage space in the chassis or body of the automobile to form a battery system. The storage space may also be understood as a box.

[0111] Based on the above technical solution, the battery cell 210, the integrated power circuit 220 and the first control circuit 230 are accommodated in the box 250, which can effectively protect the various components in the box 250, and the battery cell 210, the integrated power circuit 220 and the first control circuit 230 are arranged in the same package, which can more intuitively reflect the integration of the battery system 200 and reduce the circuit complexity outside the battery system 200.

[0112] FIG3 is a schematic diagram of a box 250 of a battery system 200 proposed in an embodiment of the present application.

[0113] As shown in Figure 3, the main components of the battery system 200 are enclosed within the housing 250, and four lines are led out of the housing 250. These four lines can be connected to the front electric drive, rear electric drive, AC charging socket 261, and DC charging socket 262, respectively. As can be seen, the connections outside the housing 250 are simpler than those outside the housing 250 in the electrical system shown in Figure 1. It should be understood that the housing 250 also includes four holes for leading out these four lines.

[0114] FIG4 is a schematic diagram of device connections of a battery system 200 proposed in an embodiment of the present application.

[0115] As shown in FIG4 , the battery system 200 further includes an AC charging socket 261, with the OBC module 221 connected between the battery cell 210 and the AC charging socket 261. The DCDC module 222 is also connected to the vehicle's low-voltage battery 2221. The battery system 200 also includes a thermal resistor 2231, which is connected to the PTC control circuit 223. Furthermore, the battery system 200 further includes a DC charging socket 262, to which the battery cell 210 is connected.

[0116] For example, the DC charging system can be connected to the battery cell 210 through the DC charging socket 262 to perform DC charging for the battery cell 210 .

[0117] For example, 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 AC power transmitted to the OBC module 221 by the AC charging system is converted into DC power by the OBC module 221, and then the DC power is transmitted to the battery cell 210 to realize the function of AC charging of the battery cell 210.

[0118] FIG5 is a schematic diagram of device connections of another battery system 200 proposed in an embodiment of the present application.

[0119] 5 , 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 .

[0120] The integrated charging socket 263 includes a DC charging socket 262 and an adapter socket 264. When connected to the DC charging socket 262, the adapter socket 264 converts the DC charging socket 262 into an AC charging socket 261 for AC charging. This allows the integrated charging socket 263 to connect to both DC and AC charging systems.

[0121] Based on this, the above-mentioned 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 vehicle's low-voltage battery 2221; the battery system 200 also includes a thermal resistance wire 2231, which is connected to the PTC control circuit 223. In addition, the battery cell is also connected to the integrated charging socket 263.

[0122] For example, when the adapter socket 264 of the integrated charging socket 263 is inactive, the integrated charging socket 263 is in a DC charging socket state, and the DC charging system can directly perform DC charging on the battery cell 210 through the integrated charging socket 263 .

[0123] For example, when the adapter socket 264 of the integrated charging socket 263 is effective, the integrated charging socket 263 is in the AC charging socket state, then the AC charging system can indirectly charge the battery cell 210 through the integrated charging socket 263, that is, the AC power input by the AC charging system is converted into DC power through the above-mentioned OBC module 221, and then the converted DC power is output to the battery cell 210.

[0124] Based on the above technical solution, the battery system 200 can realize both AC and DC charging, as well as high-voltage DC transmission and low-voltage DC transmission.

[0125] FIG6 is a schematic diagram of a box 250 of another battery system 200 proposed in an embodiment of the present application.

[0126] As shown in Figure 3, the main components of the battery system 200 are enclosed within the housing 250, and three lines are led out of the housing 250. These three lines can be connected to the front electric drive, rear electric drive, and integrated charging socket 263, respectively. It can be seen that the connection lines outside the housing 250 are further simplified compared to the connection lines outside the housing 250 shown in Figure 3. It should be understood that the housing 250 also includes three holes for leading out these three lines.

[0127] In some possible embodiments, the battery system 200 shown in Figures 4 and 5 may further include a DC charging relay 265. For the circuit diagram shown in Figure 4, the DC charging relay 265 is connected between the DC charging socket 262 and the battery cell 210. For the circuit diagram shown in Figure 5, the DC charging relay 265 is connected between the integrated charging socket 263 and the battery cell 210. The DC charging relay 265 is used to control the on-off of the DC charging circuit during DC charging.

[0128] In some possible embodiments, the battery system 200 shown in Figures 4 and 5 may further include a filter circuit 266, which is connected between the OBC module 221 and the battery cell 210. The filter circuit 266 is used in conjunction with the OBC module 221 to eliminate common-mode interference signals in the circuit.

[0129] It should be understood that equivalent replacement schemes for the circuit connections of the various components 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 the circuit connection schemes shown in Figures 4 and 5.

[0130] In some possible embodiments, the thermal resistance wire 2231 connected to the PTC control circuit 223 is also accommodated in the box 250 .

[0131] Based on the above technical solution, the thermal resistance wire 2231 and the battery cell 210 are located in the same package, so that the thermal resistance wire 2231 can directly adjust the operating temperature of the battery cell 210, which helps to improve the PTC's efficiency in regulating the operating temperature of the battery cell 210.

[0132] In some possible embodiments, generally, the system 200 also needs to include other components to cooperate with the integrated power circuit 220. These components include conventional components in the current high-voltage electrical architecture.

[0133] For example, 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 used to execute the 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.

[0134] In some possible embodiments, the functions of the control and drive circuit 271 may also be integrated into the power control chip 232 , and the power control chip 232 may directly drive the OBC module 221 , the DCDC module 222 or the PTC control circuit 223 to perform corresponding functions.

[0135] For example, these conventional components further include a main relay 272 , which is connected between the battery cell 210 and the filter circuit 266 . The main relay 272 is used to control the connection and disconnection between the battery cell 210 and the external high-voltage circuit.

[0136] For example, these conventional components also include an auxiliary power supply circuit 273, which is connected to the main control chip 231 of the above-mentioned first control circuit 230. The auxiliary power supply circuit 273 is used to provide suitable power supply for the first control circuit 230 and the integrated power circuit 220 to realize the control functions of the first control circuit 230 and the integrated power circuit 220.

[0137] For example, these conventional components also include a charging port 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 .

[0138] In some possible embodiments, the above-mentioned system 200 can also integrate a battery thermal management system, for example, at least a portion of the battery thermal management system can be integrated with the battery cell 210. For example, at least a portion of the battery thermal management system can be arranged with the battery cell 210 in the box 250 of the battery system 200.

[0139] FIG7 is a partial schematic diagram of a thermal management system of a battery system 200 proposed in an embodiment of the present application.

[0140] For the convenience of description, in the embodiment of the present application, the device to which the above-mentioned integrated power circuit 220 and the first control circuit 230 belong is collectively referred to as an integrated control device 280.

[0141] The above-mentioned system 200 also includes: a thermal management device 290, which includes: a first coolant circuit 291 and a first pump 292, wherein 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 thermal resistance wire 2231, and the third branch 2913 of the first coolant circuit 291 passes through the battery cell. At least part of the first branch 2911 of the first coolant circuit 291, the second branch 2912, and the third branch 2913 are accommodated in the box 250.

[0142] It should be understood that the thermal management device 290 is part of the battery thermal management system.

[0143] The working principle of the thermal management device 290 is as follows:

[0144] 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 thermal resistance wire 2231 does not generate heat, and the coolant circulates in the first coolant circuit 291 driven by the first pump 292, passes through the integrated control device 280 and the battery cell 210, thereby cooling the integrated control device 280 and the battery cell 210.

[0145] When the battery cell 210 needs to be heated, the PTC control circuit 223 of the integrated control device 280 controls the thermal resistance wire 2231 to generate heat. The coolant circulates in the first coolant circuit 291 based on the drive of the first pump 292, passes through the integrated control device 280, the thermal resistance wire 2231 and the battery cell 210, so that the heat dissipated by the thermal resistance wire 2231 is carried to the battery cell 210 through the first coolant circuit 291, thereby heating the battery cell 210.

[0146] Based on the above technical solution, a thermal management device 290 is also integrated into the battery system 200 to realize the function of directly cooling or heating the battery cell 210. This not only further increases the integration 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.

[0147] However, based on the above architecture, only simultaneous heating or cooling of the integrated control device 280 and the battery cell 210 can be achieved. However, under normal circumstances, the integrated control device 280 and the battery cell 210 have different heat requirements. Considering that the operating temperature of the battery cell 210 is a relatively 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.

[0148] FIG8 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application.

[0149] In some possible embodiments, based on the thermal management device 290 shown in Figure 4, the structure of the first coolant circuit 291 is adjusted, and the integrated control device 280, the thermal resistance wire 2231 and the branches corresponding to the battery cell 210 are connected in parallel. In addition, the thermal management device 290 also includes a first branch switch 01, a second branch switch 02 and a third branch switch 03, wherein 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 the integrated control device 280 needs to be cooled separately, the first branch switch 01 is opened through the main control chip 231, and the other branch switches are closed; when the battery cell 210 needs to be cooled separately, the first branch switch 01 and the third branch switch 03 are opened through the main control chip 231, and the other branch switches are closed; when the battery cell 210 needs to be heated separately, the first branch switch 01, the second branch switch 02, and the third branch switch 03 are opened through the main control chip 231.

[0150] However, based on the system 200 shown in FIG5 , while it is possible to achieve separate thermal management of the integrated control device 280 and the battery cell 210, the main control chip 231 needs to simultaneously control the first branch switch 01, the second branch switch 02, and the third branch switch 03. This increases circuit complexity and places a heavy workload on the main control chip 231 to control each switch in parallel. Considering that the integrated control device 280 is less affected by operating temperature, it is sufficient to ensure that the integrated control device 280 is cooled (the integrated control device 280 generally does not require heating) and does not affect the operating temperature of the battery cell 210. Therefore, thermal management of the system 200 can also be achieved using the system 200 shown in FIG6 .

[0151] FIG9 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application.

[0152] In some possible embodiments, the thermal management device 290 shown in Figure 7 above also 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 connected to the first branch 2911 of the first coolant circuit 291, the second end 2942 of the N-way valve 294 is connected to the second branch 2912 of the first coolant circuit 291, and the third end 2943 of the N-way valve 294 is connected to 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.

[0153] In some possible embodiments, the N-way valve 294 is connected to the main control chip 231 in the first control circuit 230 .

[0154] In the example shown in FIG9 , the N-way valve 294 is a three-way valve. Of course, when the first coolant circuit 291 includes other branches, N can be adjusted to other values, for example, replaced with a four-way valve, a five-way valve, etc.

[0155] The working principle of the thermal management device 290 is as follows (N=3, the N-way valve 294 is a three-way valve 294):

[0156] 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 thermal resistance wire 2231 does not heat up, 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 is driven by the first pump 292 and circulates based on the first branch 2911 and the second branch 2912 of the first coolant circuit 291. The heat of the integrated control device 280 can be absorbed by the coolant circulating in the first coolant circuit 291, thereby cooling the integrated control device 280 alone without affecting the operating temperature of the battery cell 210.

[0157] When the battery cell 210 needs to be cooled, the PTC control circuit 223 of the integrated control device 280 does not work, the thermal 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 is driven by the first pump 292 and circulates based on the first branch 2911 and the third branch 2913 of the first coolant circuit 291. 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, thereby cooling the integrated control device 280 and the battery cell 210.

[0158] When the battery cell 210 needs to be heated, the PTC control circuit 223 of the integrated control device 280 operates, the thermal 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 is driven by the first pump 292 and circulates based on the first branch 2911 and the third branch 2913 of the first coolant circuit 291, passing through the integrated control device 280 and the thermal resistance wire 2231, thereby carrying the heat dissipated by the thermal resistance wire 2231 to the integrated control device 280 and the battery cell 210 through the first coolant circuit 291, thereby heating the integrated control device 280 and the battery cell 210.

[0159] Based on the above technical solution, by introducing N-way valve 294, independent control of the cooling and heating of integrated control device 280 can be achieved, thereby ensuring that the heating or cooling of integrated control device 280 does not affect the operating temperature of battery cell 210. Furthermore, the architecture of thermal management device 290 is relatively simple and easy to implement.

[0160] FIG10 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application.

[0161] 10 , the thermal management device 290 further includes a heat sink 295 , and the first branch 2911 of the first coolant circuit 291 passes through the heat sink 295 .

[0162] In some possible embodiments, the heat dissipation device 295 is a radiator, a heat exchanger, a chiller, or a refrigerator.

[0163] It should be understood that based on the above-mentioned heat dissipation device 295, not only the heat dissipation efficiency of the thermal management device 290 can be increased, but the dissipated heat can also be applied to other objects, such as the cabin.

[0164] When the integrated control device 280 needs to be cooled, or the battery cell 210 needs to be cooled, the first coolant loop 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 cell 210 is quickly released through the heat dissipation device 295, thereby increasing the cooling efficiency.

[0165] In addition, the heat dissipation device 295 can be used to release the heat carried by the coolant to the heated object, such as the cabin, in a targeted manner, thereby increasing the cooling efficiency while also utilizing the heat to increase the utilization rate of the system energy.

[0166] In some possible embodiments, taking the example shown in FIG9 as an example, if the ambient temperature of the car is low, the main control chip 231 can be used to control all three valves of the three-way valve 294 to be opened, and the PTC control circuit 223 can control the thermal resistance wire 2231 to operate, and then the heat of the integrated control device 280, the thermal resistance wire 2231 and the battery cell 210 can be released to the cabin through the first coolant circuit 291, thereby increasing the efficiency of heating the cabin.

[0167] 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.

[0168] FIG11 is a partial schematic diagram of a thermal management system of another battery system 200 proposed in an embodiment of the present application.

[0169] The above-mentioned system 200 also includes: a thermal management device 290 including: a first coolant loop 291, a second coolant loop 296, a first pump 292 and a second pump 297, the first pump 292 is connected to the first branch 2911 of the first coolant loop 291, the second branch 2912 of the first coolant loop 291 passes through the thermal resistance wire 2231, and the third branch 2913 of the first coolant loop 291 passes through the battery cell. At least a portion of the first branch 2911 of the first coolant loop 291, the second branch 2912 and the third branch 2913 of the first coolant loop 291 are accommodated in the housing 250; the second pump 297 is connected to the first branch 2961 of the second coolant loop 296, the first branch 2961 of the second coolant loop 296 passes through the integrated control device 280, and at least a portion of the first branch 2961 of the second coolant loop 296 is accommodated in the housing 250.

[0170] It should be understood that the thermal management device 290 may also include an N-way valve 294. The function and corresponding extended description of the N-way valve 294 are detailed in the previous embodiment and are not repeated here. In addition, the thermal management device 290 shown in FIG11 may also include a heat sink 295. The function and corresponding extended description of the heat sink 295 are detailed in the previous embodiment and are not repeated here.

[0171] Based on the above technical solution, considering the different heat requirements of the integrated control device 280 and the battery cell 210, the cooling liquid circuits of the integrated control device 280 and the battery cell 210 are decoupled to achieve the cooling and heating of the integrated control device 280 and the battery cell 210 without affecting each other.

[0172] It should be noted that, in the above embodiment, the various components installed in the box 250 can be considered to be integrated into one device, so the device integrated in the box 250 can be called a power battery, which integrates the above-mentioned battery cell 210 (usually including multiple battery cells), the integrated control device 280 and part of the thermal management device 290. The power battery is also a technical solution to be proposed in the embodiment of the present application. Since the various components and extensions included in the power battery are described in the corresponding embodiments of the battery system 200, please refer to the aforementioned corresponding embodiments for details and will not be repeated here.

[0173] Based on the above technical solution, the main components of the battery system 200 are housed in the box 250 to form a power battery, and the power battery only needs to lead out 3 or 4 connection lines to the outside, which simplifies the external wiring of the power battery.

[0174] Based on the system 200 described above, the embodiment of the present application further proposes an integrated control device 280.

[0175] FIG12 is a schematic diagram of an integrated control device 280 proposed in an embodiment of the present application.

[0176] 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 to the battery cells. The first control circuit 230 is used to control the integrated power circuit 220.

[0177] 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 the integrated power circuit 220 and the first control circuit 230 in the aforementioned system 200. Therefore, for the relevant extended description of the integrated power circuit 220 and the first control circuit 230 in the integrated control device 280, please refer to the aforementioned corresponding embodiment and will not be repeated here.

[0178] In addition, an embodiment of the present application also proposes a new energy vehicle, which includes any battery system 200 proposed in the aforementioned embodiment, or includes any power battery proposed in the aforementioned embodiment, or the battery system of the new energy vehicle includes any integrated control device 280 proposed in the aforementioned embodiment.

[0179] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0180] Those skilled in the art will 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 aforementioned method embodiments and will not be repeated here.

[0181] In the several embodiments provided in this 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 schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0182] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0183] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0184] 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, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

[0185] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection 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 the battery cell, and is used to control the integrated power circuit.

2. The battery system according to claim 1, wherein: 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, connected between the power control chip and the integrated power circuit, the first sampling circuit being used to collect a first operating parameter of the integrated power circuit in real time, the first operating parameter being used by the power control chip to perform closed-loop control of the integrated power circuit; a second sampling circuit, wherein the second sampling circuit is connected between the sampling chip and the battery cell, and further 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 status of the integrated power circuit and the battery cell is 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 includes 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 includes 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, and the third branch of the first coolant circuit passes through the battery cell. 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, and the third branch of the first coolant circuit passes through the battery cell. At least a portion of the first branch, the second branch, and the third branch of the first coolant circuit 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 includes a heat dissipation device, and the first branch of the first coolant circuit passes through the heat dissipation device.

13. The battery system according to claim 12, wherein: 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 includes: 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 the battery cell, and 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 according to any one of claims 1 to 13, or the battery system of the new energy vehicle comprises the integrated control device according to any one of claims 14 to 16.

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