Battery management system, battery system and vehicle

Abstract

The utility model discloses a battery management system, a battery system and a vehicle. The battery management system comprises a controller, an awakening module and a charging control guiding module, the awakening module is used for awakening the controller; the charging control guide module, a first connection confirmation interface of the vehicle and the second end of the controller are connected, and the charging control guide module is connected with the grounding end; the controller is used for controlling the state of the charging control guide module after being awakened; the third end of the controller and a second connection confirmation interface of the vehicle are connected to a second node, the second node is connected with the grounding end through an eighth resistor and connected to the first power supply through a ninth resistor, and the second connection confirmation interface of the vehicle is connected with a second charging connection confirmation interface of the charging equipment; and the controller is further used for determining the charging standard of the charging equipment connected with the connection confirmation interface of the vehicle according to the voltage of the second node. According to the embodiment of the invention, the charging control guidance can be effectively controlled.

Description

Technical Field

[0001] The present application relates to the technical field of battery management, and in particular to a battery management system, a battery system and a vehicle. Background Art

[0002] The new energy charging control guidance circuit monitors, regulates and protects the battery charging process according to the charging requirements and conditions. It is used to control and guide the charging of new energy batteries in order to achieve efficient, safe and stable charging. Therefore, it is very necessary to achieve effective control of the charging control guidance. Utility Model Content

[0003] The present application provides a battery management system, a battery system and an electrical device, which can realize effective control of charging control guidance.

[0004] In a first aspect, the present application provides a battery management system, including: a controller, a wake-up module, and a charging control guidance module; the wake-up module is connected to a first connection confirmation interface of a vehicle and a first end of the controller, the first connection confirmation interface of the vehicle is used to connect to a first charging connection confirmation interface of a charging device, and the wake-up module is used to wake up the controller; the charging control guidance module, the first connection confirmation interface of the vehicle, and the second end of the controller are connected, and the charging control guidance module is connected to the ground end; the controller is used to control the state of the charging control guidance module after being awakened.

[0005] The third end of the controller is connected to the second connection confirmation interface of the vehicle at a second node, the second node is connected to the reference ground through an eighth resistor, and the second node is connected to the first power supply through a ninth resistor, and the second connection confirmation interface of the vehicle is connected to the second charging connection confirmation interface of the charging device; the controller is also used to determine the charging standard that the charging device connected to the connection confirmation interface of the vehicle complies with based on the voltage of the second node.

[0006] According to the battery management system provided by the embodiment of the present application, a controller, a wake-up module and a charging control guidance module are provided, wherein the wake-up module is connected to the first connection confirmation interface of the vehicle and the first end of the controller, and the wake-up module is used to wake up the controller. After the first connection confirmation interface of the vehicle is connected to the first charging connection confirmation interface of the charging device, the electrical signal of the first charging connection confirmation interface of the charging device will be transmitted to the wake-up module through the first connection confirmation interface of the vehicle. The wake-up module generates a wake-up signal based on the signal of the first connection confirmation interface of the vehicle and transmits it to the first end of the controller, thereby waking up the controller. After the controller is awakened, it can effectively control the charging control guidance. In addition, by obtaining the voltage of the second node, it is possible to determine the charging standard that the charging device connected to the connection confirmation interface of the vehicle meets, and then it is possible to perform charging detection according to different charging standards to realize the charging of the vehicle.

[0007] In a possible implementation of the first aspect, the charging control guidance module includes a first charging control guidance module and a second charging control guidance module; the first charging control guidance module, the second charging control guidance module, the first connection confirmation interface of the vehicle and the second end of the controller are connected, and the first charging control guidance module and the second charging control guidance module are also connected to the ground end.

[0008] In a possible implementation of the first aspect, when the charging device connected to the first connection confirmation interface of the vehicle meets the first charging standard, the first charging control guidance module is connected, and when the charging device connected to the first connection confirmation interface of the vehicle meets the second charging standard, the second charging control guidance module is connected.

[0009] When the controller determines that the charging device connected to the vehicle meets different charging standards, different charging control guidance modules can be used. Specifically, when the first charging standard is met, the controller can control the first charging control guidance module to be connected, and control the second charging control guidance module to be disconnected, so that the first charging control guidance module can be used for charging control and / or detection; when the second charging standard is met, the controller can control the second charging control guidance module to be connected, and control the first charging control guidance module to be disconnected, so that the second charging control guidance module can be used for charging control and / or detection. Therefore, the embodiment of the present application can ensure that the controller can perform charging control and / or detection based on different charging control guidance modules, so that different charging standards can be taken into account when the vehicle is charged, thereby improving the universality of vehicle charging.

[0010] In a possible implementation of the first aspect, the wake-up module includes a first resistor and a second resistor, the first end of the first resistor is connected to the first connection confirmation interface of the vehicle, the second end of the first resistor is connected to the first end of the second resistor and the first end of the controller, and the second end of the second resistor is connected to the ground terminal.

[0011] In an embodiment of the present application, after determining that the first connection confirmation interface of the vehicle is normally connected to the first charging connection confirmation interface of the charging device, the divided voltage of the second resistor is transmitted to the controller, thereby waking up the controller, ensuring that the controller is in a working state, and being able to achieve effective control of the charging control guidance module.

[0012] In a possible implementation of the first aspect, the charging control guidance module includes multiple branches, which are connected to the first connection confirmation interface of the vehicle, the second end of the controller and the ground end, and each branch includes a switch.

[0013] In the embodiment of the present application, the charging control guidance module includes multiple branches, and each branch includes a switch, so that each branch can be controlled separately, so that some branches can be used as branches matching the first charging standard, and some branches can be used as branches matching the second charging standard. It is understandable that, in the absence of contradiction, some branches can be used as branches matching the first charging standard and branches matching the second charging standard, that is, in the absence of contradiction, some branches can be shared by two or more standards.

[0014] In a possible implementation of the first aspect, the first charging control guidance module includes a first branch and a second branch, the first branch includes a third resistor and a first switch, the second branch includes a fourth resistor and a second switch, the first end of the third resistor is connected to the first node, the second end of the third resistor is connected to the first end of the first switch, the second end of the first switch is connected to the ground, and the fourth resistor and the second switch are connected in series between the second end of the third resistor and the ground.

[0015] In an embodiment of the present application, the controller controls the states of the first switch and the second switch, thereby changing the resistance in the access circuit, causing the potential of the first node to change, thereby enabling control and / or detection of different states when charging based on the first charging standard.

[0016] In a possible implementation of the first aspect, when the charging device connected to the first connection confirmation interface of the vehicle meets the first charging standard, the first switch is closed, the second switch is opened, and the second charging control guidance module is disconnected.

[0017] In the embodiment of the present application, when the charging device connected to the first connection confirmation interface of the vehicle meets the first charging standard, the controller can control the first charging control guidance module to be in the initial state for charging detection, that is, the first switch is closed and the second switch is open. Furthermore, the controller can control the states of the first switch and the second switch in the first charging control guidance module according to the charging process of the first charging standard to achieve charging detection.

[0018] In a possible implementation of the first aspect, the second charging control guidance module includes a third branch, a fourth branch and a fifth branch, the third branch, the fourth branch and the fifth branch are connected in parallel between the first node and the ground terminal, the third branch includes a fifth resistor and a third switch connected in series, the fourth branch includes a sixth resistor and a fourth switch connected in series, the fifth branch includes a seventh resistor and a fifth switch connected in series, and the first node includes a connection node between the first connection confirmation interface of the vehicle and the second end of the controller.

[0019] In an embodiment of the present application, the controller controls the states of the third switch, the fourth switch, and the fifth switch, thereby changing the resistance in the access circuit, causing the potential of the first node to change, thereby enabling control and / or detection of different states when charging based on the second charging standard.

[0020] In a possible implementation of the first aspect, when the charging device connected to the second connection confirmation interface of the vehicle meets the second charging standard, the third switch is closed and the first charging control guidance module is disconnected.

[0021] In the application embodiment, when the charging device connected to the first connection confirmation interface of the vehicle meets the second charging standard, the controller can control the second charging control guidance module to be in the initial state for charging detection, that is, the third switch is closed and the fourth switch and the fifth switch are opened. Furthermore, the controller can control the states of the third switch, the fourth switch and the fifth switch in the second charging control guidance module according to the charging process of the second charging standard to achieve charging detection.

[0022] Based on the same technical concept, in a second aspect, an embodiment of the present application provides a battery management system, comprising a signal sampling circuit as described in any embodiment of the first aspect.

[0023] Based on the same technical concept, in a third aspect, an embodiment of the present application provides an electrical device, comprising a battery management system as described in any embodiment of the first aspect.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of a battery management system according to an embodiment of the present application;

[0027] Figure 2 This is a schematic structural diagram of a battery management system according to another embodiment of the present application;

[0028] Figure 3 This is a structural schematic diagram of a battery management system according to another embodiment of the present application;

[0029] Figure 4 This is a schematic structural diagram of a battery management system according to another embodiment of the present application;

[0030] Figure 5 This is a schematic structural diagram of a battery management system according to another embodiment of the present application;

[0031] Figure 6 This is a schematic structural diagram of a battery management system according to another embodiment of the present application;

[0032] Figure 7 A schematic diagram of the circuit structure of a charging system according to an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 100. Battery management system;

[0035] 110, controller; 120, wake-up module; 130, charging control guidance module; 140, charging device;

[0036] 131. A first charging control guidance module; 132. A second charging control guidance module;

[0037] CC1', first connection confirmation interface; CC1, first charging connection confirmation interface; CC2', second connection confirmation interface; CC2, second charging connection confirmation interface; N1, first node; N2, second node;

[0038] R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor;

[0039] R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor; R81, first eighth resistor; R82, second eighth resistor;

[0040] R9, ninth resistor;

[0041] S1, first switch; S2, second switch; S3, third switch; S4, fourth switch;

[0042] S5, fifth switch;

[0043] 200, charging system; 220, vehicle interface; 141, charger controller; 142, auxiliary power supply;

[0044] K1, first contactor; K2, second contactor;

[0045] K5, fifth contactor; K6, sixth contactor;

[0046] R10, the tenth resistor; R11, the eleventh resistor. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] Figure 1 FIG. 1 is a schematic diagram of a battery management system 100 according to an embodiment of the present application. The battery management system is applied to a vehicle, and specifically can be applied to an electric vehicle. Figure 1 As shown, the battery management system 100 includes: a controller 110, a wake-up module 120, and a charging control guidance module 130. The wake-up module 120 is connected to the first connection confirmation interface CC1' of the vehicle and the first end of the controller 110, and is used to wake up the controller 110.

[0051] The charging device 140 and the vehicle are provided with matching connection confirmation interfaces, that is, the charging device 140 has a first charging connection confirmation interface CC1 that matches the first connection confirmation interface CC1' of the vehicle, and the charging device 140 has a second connection confirmation interface CC2' ( Figure 1 The second charging connection confirmation interface CC2 (not shown) matches Figure 1The first connection confirmation interface CC1' of the vehicle is used to connect to the first charging connection confirmation interface CC1 of the charging device 140. For the convenience of explanation, the charging control guidance module 130, the first connection confirmation interface CC1' of the vehicle and the second end of the controller 110 are connected to the first node N1 for illustration in this application, and the charging control guidance module 130 is connected to the ground terminal GND; the controller 110 is used to control the state of the charging control guidance module 130 after being awakened.

[0052] Exemplarily, the charging device 140 may be a non-vehicle charger, for example, the charging device may be a charging gun. Through the first connection confirmation interface CC1' of the vehicle and the first charging connection confirmation interface CC1 of the charging device, it is determined whether the vehicle and the charging device are normally connected. When it is determined that the two are normally connected, the state of the charging control guidance module 130 can be controlled by the controller 110.

[0053] Furthermore, when it is determined that the vehicle is successfully connected to the charging device, the controller can be awakened by the awakening module 120 to ensure that the controller is in a working state, thereby ensuring that the controller can effectively control the charging control guidance module 130.

[0054] Exemplarily, the controller may implement charging detection by controlling the working state of the charging control guidance module.

[0055] According to the battery management system provided in the embodiment of the present application, a controller, a wake-up module and a charging control guidance module are provided, wherein the wake-up module is connected to the first connection confirmation interface of the vehicle and the first end of the controller, and the wake-up module is used to wake up the controller. After the first connection confirmation interface of the vehicle is connected to the first charging connection confirmation interface of the charging device, the electrical signal of the first charging connection confirmation interface of the charging device will be transmitted to the wake-up module through the first connection confirmation interface of the vehicle. The wake-up module generates a wake-up signal based on the signal of the first connection confirmation interface of the vehicle and transmits it to the first end of the controller, thereby waking up the controller. After the controller is awakened, it can effectively control the charging control guidance.

[0056] In some optional embodiments, the charging control guidance module 130 includes a plurality of branches connected between the first node N1 and the ground terminal GND, and each branch includes a switch.

[0057] There are significant differences between the charging communication standard protocols used by domestic vehicles and those used by foreign vehicles. Therefore, how to achieve charging standard compatibility is a problem faced by technical personnel in this field.

[0058] In the embodiment of the present application, the charging control guidance module 130 includes multiple branches, and each branch includes a switch, so that each branch can be controlled separately, so that some branches can be used as branches matching the first charging standard, and some branches can be used as branches matching the second charging standard. It is understandable that, in the absence of contradiction, some branches can be used as branches matching the first charging standard and branches matching the second charging standard, that is, in the absence of contradiction, some branches can be shared by two or more standards.

[0059] In some optional embodiments, Figure 2 This is a schematic diagram of the structure of a battery management system according to another embodiment of the present application. Figure 2 As shown, the charging control guidance module 130 includes a first charging control guidance module 131 and a second charging control guidance module 132; the first charging control guidance module 131, the second charging control guidance module 132, the first connection confirmation interface CC1' of the vehicle and the second end of the controller 110 are connected to the first node N1, and the first charging control guidance module 131 and the second charging control guidance module 132 are also connected to the ground terminal GND.

[0060] When the charging device of the first connection confirmation interface CC1' of the vehicle meets the first charging standard, the first charging control guidance module 131 is connected; when the charging device connected to the first connection confirmation interface CC1' of the vehicle meets the second charging standard, the second charging control guidance module 132 is connected. Here, "connected" means that the charging control guidance module is in working state.

[0061] Specifically, the controller 110 is used to control the second charging control guidance module 132 to disconnect when the charging device of the first connection confirmation interface CC1' of the vehicle meets the first charging standard, and to control the first charging control guidance module 131 to disconnect when the charging device connected to the first connection confirmation interface CC1' of the vehicle meets the second charging standard.

[0062] The vehicle in the embodiment of the present application can be compatible with two charging standards, including a first charging standard and a second charging standard. The first charging control guidance module 131 matches the first charging standard, and the second charging control guidance module 132 matches the second charging standard. Among them, the first charging standard can be the 2015 national standard upgrade standard, that is, the "2015+" charging standard; the second charging standard can be the "chao ji charging" charging standard. The "chao ji charging" charging standard and the "2015+" charging standard are charging standards that are in line with multiple countries. The vehicle takes into account both the "chaoji charging" charging standard and the "2015+" charging standard, which can improve the universality of vehicle charging.

[0063] When the controller determines that the vehicle uses different charging standards, it can control the first charging control guidance module and the second charging control guidance module to be in different states, and then implement charging control and / or detection based on the first charging control guidance module and the second charging control guidance module in different states. It can be understood that in the embodiment of the present application, the first charging control guidance module and the second charging control guidance module are two independent modules. When one of the charging control guidance modules is used for charging control, the other charging control guidance module is disconnected to avoid interference from the other charging control guidance module.

[0064] Exemplarily, when the controller determines that the charging device connected to the first connection confirmation interface of the vehicle meets the first charging standard, the controller can control the second charging control guidance module to disconnect so that the second charging control guidance module is in a non-working state, and control the first charging control guidance module to be in a working state.

[0065] Exemplarily, when the controller determines that the charging device connected to the first connection confirmation interface of the vehicle meets the second charging standard, the controller can control the first charging control and guidance module to be disconnected and control the second charging control and guidance module to be in an operating state.

[0066] In the embodiment of the present application, when the controller determines that the charging device connected to the vehicle meets different charging standards, different charging control guidance modules can be used. Specifically, when the first charging standard is met, the second charging control guidance module is controlled to be disconnected, so that the first charging control guidance module can be used for charging control and / or detection; when the second charging standard is met, the first charging control guidance module is controlled to be disconnected, so that the second charging control guidance module can be used for charging control and / or detection. Therefore, the embodiment of the present application can ensure that the controller can perform charging control and / or detection based on different charging control guidance modules, so that different charging standards can be taken into account when the vehicle is charged, thereby improving the universality of vehicle charging.

[0067] In some optional embodiments, Figure 3 This is a schematic diagram of the structure of a battery management system according to another embodiment of the present application. Figure 3 As shown, the wake-up module 120 includes a first resistor R1 and a second resistor R2, the first end of the first resistor R1 is connected to the first connection confirmation interface CC1' of the vehicle, the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the first end of the controller 110, and the second end of the second resistor R2 is connected to the ground terminal GND.

[0068] The first resistor R1 and the second resistor R2 are equivalent to being connected in series between the first connection confirmation interface CC1' of the vehicle and the ground terminal, and the connection node of the first resistor R1 and the second resistor R2 is a voltage dividing node, which is connected to the first end of the controller 110. After the first connection confirmation interface CC1' of the vehicle is connected to the first charging connection confirmation interface CC1 of the charging device, the voltage of the first charging connection confirmation interface CC1 of the charging device is transmitted to the first connection confirmation interface CC1' of the vehicle, and the voltage dividing node will generate a divided voltage, which is supplied to the first end of the controller 110, thereby realizing the wake-up function of the controller 110.

[0069] In some embodiments, the resistance values ​​of the first voltage and the second voltage can be determined by relevant technicians based on the voltage of the first connection confirmation interface of the vehicle and controller-related parameters.

[0070] In an embodiment of the present application, after the first connection confirmation interface of the vehicle is normally connected to the first charging connection confirmation interface of the charging device, the divided voltage of the second resistor is transmitted to the controller, thereby waking up the controller and ensuring that the controller is in a working state, thereby ensuring that the controller can effectively control the charging control guidance module 130.

[0071] In some optional embodiments, Figure 4 This is a schematic diagram of the structure of a battery management system according to another embodiment of the present application. Figure 4 As shown, the first charging control guidance module 131 includes a first branch and a second branch, the first branch includes a third resistor R3 and a first switch S1, the second branch includes a fourth resistor R4 and a second switch S2, the first end of the third resistor R3 is connected to the first node N1, the second end of the third resistor R3 is connected to the first end of the first switch S1, the second end of the first switch S1 is connected to the ground terminal GND, and the fourth resistor R4 and the second switch S2 are connected in series between the second end of the third resistor R3 and the ground terminal GND.

[0072] In one example, the first switch and / or the second switch may be a transistor, for example, a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET).

[0073] Exemplarily, the states of the first switch and the second switch may be controlled by the controller 110. The states of the first switch and the second switch may include a closed state and an open state. When the switch is in the closed state, that is, the switch is turned on.

[0074] When the first switch S1 is closed and the second switch S2 is open, the first node N1 is connected to the ground terminal through the third resistor R3, and the third resistor R3 pulls down the potential of the first node N1.

[0075] When the first switch S1 is opened and the second switch S2 is closed, the first node N1 is connected to the ground through the third resistor R3 and the fourth resistor R4. The third resistor R3 and the fourth resistor R4 are connected in series to pull down the potential of the first node N1.

[0076] When the first switch S1 is closed and the second switch S2 is closed, the impedance of the branch where the fourth resistor R4 is located is relatively large, and the current will directly flow from the third resistor R3 through the first switch S1 to the ground end, that is, the first node N1 is also connected to the ground end through the third resistor R3, and the third resistor R3 pulls down the potential of the first node N1.

[0077] It is understandable that under different state combinations of the first switch S1 and the second switch S2, the potential of the first node N1 will be different. The controller 110 is connected to the first node N1, and the controller 110 can collect the potential of the first node N1. In this way, under the first charging standard, the controller can perform corresponding control according to the potential of the first node N1, and / or, according to the potential of the first node N1, different states of the charging process can be detected.

[0078] Specifically, the states of the first switch and the second switch may be controlled according to the requirements of the first charging standard (such as the "2015+" charging standard), which is not a mandatory requirement. Exemplarily, the resistance values ​​of the third resistor and the fourth resistor may be determined by the resistance values ​​of the resistors required in the first charging standard. For example, when the first charging standard is the "2015+" charging standard, the resistance value of the first resistor may be 1 kilo ohm (KΩ), and the resistance value of the second resistor may be 9 KΩ.

[0079] In an embodiment of the present application, the controller controls the states of the first switch and the second switch, thereby changing the resistance in the access circuit, causing the potential of the first node to change, thereby enabling control and / or detection of different states when charging based on the first charging standard.

[0080] In some optional embodiments, when the charging device connected to the first connection confirmation interface of the vehicle meets the first charging standard, the first switch is closed, the second switch is opened, and the second charging control guidance module is disconnected.

[0081] When the controller determines that the charging device connected to the first connection confirmation interface of the vehicle complies with the "2015+" charging standard, it can first send an enable signal to the first switch and a disable signal to the second switch, so that the first switch is closed and the second switch is disconnected. In this process, the controller simultaneously controls the second charging control guidance module to disconnect. Furthermore, the controller can control the status of the first switch and the second switch according to the charging process of the "2015+" charging standard to achieve charging detection.

[0082] In the embodiment of the present application, when the charging device connected to the first connection confirmation interface of the vehicle meets the first charging standard, the controller can control the first charging control guidance module to be in the initial state for charging detection, that is, the first switch is closed and the second switch is open. Furthermore, the controller can control the states of the first switch and the second switch in the first charging control guidance module according to the charging process of the first charging standard to achieve charging detection.

[0083] In some optional embodiments, Figure 5 This is a schematic diagram of the structure of a battery management system according to another embodiment of the present application. Figure 5 As shown, the second charging control guidance module 132 includes a third branch, a fourth branch and a fifth branch, the third branch, the fourth branch and the fifth branch are connected in parallel between the first node N1 and the ground terminal GND, the third branch includes a fifth resistor R5 and a third switch S3 connected in series, the fourth branch includes a sixth resistor R6 and a fourth switch S4 connected in series, and the fifth branch includes a seventh resistor R7 and a fifth switch S5 connected in series.

[0084] In one example, the third switch, the fourth switch and the fifth switch may all be transistors, such as MOS transistors.

[0085] Exemplarily, the states of the third switch, the fourth switch and the fifth switch may be controlled by the controller, wherein the states of the third switch, the fourth switch and the fifth switch may include a closed state and an open state.

[0086] When any one of the third switch, the fourth switch, and the fifth switch is closed, the resistor connected in series pulls down the potential of the first node. When multiple switches among the third switch, the fourth switch, and the fifth switch are closed, the resistors connected in series of the multiple switches all pull down the potential of the first node. In this case, the potential of the first node will be pulled down even lower.

[0087] It is understandable that under different state combinations of the third switch, the fourth switch and the fifth switch, the potential of the first node N1 will also be different. The controller 110 is connected to the first node N1, and the controller 110 can collect the potential of the first node N1. In this way, under the second charging standard, the controller can perform corresponding control according to the potential of the first node N1, and / or, according to the potential of the first node N1, different states of the charging process can be detected.

[0088] Specifically, the states of the third switch, the fourth switch, and the fifth switch may be controlled according to the requirements of the second charging standard (eg, the "chao ji" charging standard), which is not a mandatory requirement.

[0089] Exemplarily, the resistance values ​​of the third resistor, the fourth resistor, and the fifth resistor may be determined by the resistance values ​​of the resistors in the second charging standard. For example, when the second charging standard is the "chao ji charging" charging standard, the resistance value of the third resistor may be 100 KΩ, the resistance value of the fourth resistor may be 1300Ω, and the resistance value of the fifth resistor may be 2740Ω.

[0090] In an embodiment of the present application, the controller controls the states of the third switch, the fourth switch, and the fifth switch, so that the resistance in the access circuit changes, causing the potential of the first node to change, thereby enabling control and / or detection of different states when charging based on the second charging standard.

[0091] In some optional embodiments, when the charging device connected to the first connection confirmation interface of the vehicle meets the second charging standard, the third switch S3 is closed and the first charging control guidance module 131 is opened.

[0092] When the controller determines that the charging device connected to the first connection confirmation interface of the vehicle meets the "chao ji charging" charging standard, it can first send an enable signal to the third switch and a disable signal to the fourth switch and the fifth switch, so that the third switch is closed and the fourth switch and the fifth switch are disconnected. In this process, the controller also controls the first charging control guidance module to disconnect. Furthermore, the controller can further control the status of the third switch, the fourth switch and the fifth switch according to the charging process of the "chao ji charging" charging standard to achieve charging detection.

[0093] In the embodiment of the present application, when the charging device connected to the first connection confirmation interface of the vehicle meets the second charging standard, the controller can control the second charging control guidance module to be in the initial state for charging detection, that is, the third switch is closed and the fourth switch and the fifth switch are opened. Furthermore, the controller can control the states of the third switch, the fourth switch and the fifth switch in the second charging control guidance module according to the charging process of the second charging standard to achieve charging detection.

[0094] In some optional embodiments, in order to enable the controller to determine the charging standard that the charging device connected to the first connection confirmation interface of the vehicle complies with, as another implementation method in the embodiment of the present application, Figure 6 As shown, the third end of the controller 110 in the embodiment of the present application is connected to the second connection confirmation interface CC2' of the vehicle at the second node N2, the second node N2 is connected to the ground terminal GND through the eighth resistor R8, and the second node N2 is connected to the first power supply VCC through the ninth resistor R9, and the second connection confirmation interface CC2' of the vehicle is connected to the second charging connection confirmation interface CC2 of the charging device; the controller 110 is also used to determine the charging standard that the charging device connected to the second connection confirmation interface CC2' of the vehicle complies with according to the voltage of the second node N2.

[0095] The resistance of the ninth resistor R9 is fixed, and the voltage of the first power supply VCC is fixed. When the charging device complies with different standard types, the resistance of the eighth resistor R8 will change, so the potential of the second node N2 will change, and the potential collected by the controller 110 from the second node N2 will change. Therefore, the controller 110 can determine the charging type that the charging device connected to the vehicle complies with based on the potential of the second node N2.

[0096] like Figure 6 As shown, the charging device 140 and the vehicle are provided with matching connection confirmation interfaces, that is, the charging device 140 has a first charging connection confirmation interface CC1 that matches the first connection confirmation interface CC1' of the vehicle, and the charging device 140 has a second charging connection confirmation interface CC2 that matches the second connection confirmation interface CC2' of the vehicle. Exemplarily, the connection confirmation interface of the vehicle and the charging connection confirmation interface of the charging device can be connected via an adapter.

[0097] Exemplarily, the eighth resistor R8 may be disposed in the adapter. The number of the eighth resistor R8 may include two, namely a first eighth resistor R81 and a second eighth resistor R82. The connection relationship between R81 and R82 is shown in FIG. Figure 6 , I will not go into details here.

[0098] Exemplarily, the ninth resistor R9 may be connected to the second node via a switch K, and by controlling the state of the switch K, it may be controlled whether the second node N2 can be connected to the first power source VCC.

[0099] Combine the following Figure 7 , the battery management system in the embodiment of the present application is described.

[0100] For example, Figure 7 FIG. 1 is a schematic diagram of a circuit structure of a charging system according to an embodiment of the present application. Figure 7 As shown, the charging system 200 includes a charging device 140 , a vehicle interface 220 , a battery management system, a battery connected to the battery management system, a vehicle controller, and the like.

[0101] The charging device 140 is a non-vehicle charging device. The vehicle interface 220 serves as an adapter. The vehicle controller includes the controller 110 in any of the above embodiments.

[0102] As an example, the charging device 140 includes a charger controller 141, an auxiliary power supply 142, a first contactor K1 and a second contactor K2, a short circuit device K0 on the input side of the AC power supply, a diode D1, a tenth resistor R10, an eleventh resistor R11, and a switch S6. Among them, the eighth resistor R8 is in the vehicle plug and is used for hardware version coding; the switch S is an internal normally closed switch of the vehicle plug, and the switch S6 is a normally closed switch inside the non-vehicle charger. The first contactor K1 and the second contactor K2 can be contactors on the DC power supply circuit.

[0103] The battery management system includes a fifth contactor K5 and a sixth contactor K6, a vehicle controller 110, a resistor and a switch in a charging control pilot circuit, etc. The fifth contactor K5 and the sixth contactor K6 may be contactors on a vehicle charging circuit.

[0104] It should be noted that Figure 7 The structure shown is merely exemplary and is not intended to limit the present application.

[0105] Based on the same technical concept, the embodiment of the present application also provides a battery system, including the battery management system in any of the above embodiments. It can be understood that the battery system has the beneficial effects of the battery management system provided in the embodiment of the present application, and the specific description of the battery management system in the above embodiments can be referred to, and this embodiment will not be repeated here.

[0106] Based on the same technical concept, the present application also provides a vehicle. The vehicle includes a battery system, and the battery system includes the battery management system in any of the above embodiments. It can be understood that the vehicle has the beneficial effects of the battery management system provided in the embodiments of the present application, and the specific description of the battery management system in the above embodiments can be referred to, and this embodiment will not be repeated here.

[0107] It should be noted that, in the above embodiments, the resistor is represented by a single resistor. In other embodiments, the resistor may also be an integration of series, parallel or hybrid resistors. In addition, in the above embodiments, the capacitor is represented by a single capacitor. In other embodiments, the capacitor may also be an integration of series, parallel or hybrid capacitors. The specific parameters of each device may be set according to actual needs, and this application does not limit this.

[0108] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0109] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery management system, characterized in that: include: Controller, wake-up module, charging control guidance module; The wake-up module is connected to the first connection confirmation interface of the vehicle and the first end of the controller, the first connection confirmation interface of the vehicle is used to connect to the first charging connection confirmation interface of the charging device, and the wake-up module is used to wake up the controller; The charging control guidance module, the first connection confirmation interface of the vehicle and the second end of the controller are connected, and the charging control guidance module is connected to the ground end; The controller is used to control the state of the charging control guidance module after being awakened; The third end of the controller is connected to the second connection confirmation interface of the vehicle at a second node, the second node is connected to the ground terminal through an eighth resistor, and the second node is connected to the first power supply through a ninth resistor, and the second connection confirmation interface of the vehicle is connected to the second charging connection confirmation interface of the charging device; The controller is also used to determine, based on the voltage of the second node, a charging standard that a charging device connected to the connection confirmation interface of the vehicle complies with.

2. The battery management system according to claim 1, characterized in that: The charging control guidance module includes a first charging control guidance module and a second charging control guidance module; The first charging control guiding module, the second charging control guiding module, the first connection confirmation interface of the vehicle and the second end of the controller are connected, and the first charging control guiding module and the second charging control guiding module are also connected to the ground end.

3. The battery management system according to claim 2, characterized in that: When the charging device connected to the first connection confirmation interface of the vehicle meets the first charging standard, the first charging control guidance module is connected; when the charging device connected to the first connection confirmation interface of the vehicle meets the second charging standard, the second charging control guidance module is connected.

4. The battery management system according to any one of claims 1 to 3, characterized in that: The wake-up module includes a first resistor and a second resistor, the first end of the first resistor is connected to the first connection confirmation interface of the vehicle, the second end of the first resistor is connected to the first end of the second resistor and the first end of the controller, and the second end of the second resistor is connected to the ground end.

5. The battery management system according to any one of claims 1 to 3, characterized in that: The charging control guidance module includes a plurality of branches, which are connected to the first connection confirmation interface of the vehicle, the second end of the controller and the ground end, and each of the branches includes a switch.

6. The battery management system according to claim 2, characterized in that: The first charging control guidance module includes a first branch and a second branch, the first branch includes a third resistor and a first switch, the second branch includes a fourth resistor and a second switch, the first end of the third resistor is connected to the first node, the second end of the third resistor is connected to the first end of the first switch, the second end of the first switch is connected to the ground terminal, the fourth resistor and the second switch are connected in series between the second end of the third resistor and the ground terminal, and the first node includes the charging control guidance module, the first connection confirmation interface of the vehicle, and the connection node of the second end of the controller.

7. The battery management system according to claim 6, characterized in that: When the charging device connected to the first connection confirmation interface of the vehicle meets the first charging standard, the first switch is closed, the second switch is opened, and the second charging control guidance module is disconnected.

8. The battery management system according to claim 2, characterized in that: The second charging control guidance module includes a third branch, a fourth branch and a fifth branch, the third branch, the fourth branch and the fifth branch are connected in parallel between the first node and the ground terminal, the third branch includes a fifth resistor and a third switch connected in series, the fourth branch includes a sixth resistor and a fourth switch connected in series, the fifth branch includes a seventh resistor and a fifth switch connected in series, and the first node includes a connection node between the first connection confirmation interface of the vehicle and the second end of the controller.

9. The battery management system according to claim 8, characterized in that: When the charging device connected to the second connection confirmation interface of the vehicle meets the second charging standard, the third switch is closed and the first charging control guidance module is disconnected.

10. A battery system, characterized in that: The invention comprises a battery and a battery management system as claimed in any one of claims 1 to 9.

11. A vehicle, characterized in that: Comprising a battery and a battery system as claimed in claim 10.

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