TWM566945U - Battery power management system - Google Patents

Abstract

A battery power management device includes: a plurality of battery devices each having a positive connection terminal and a negative connection terminal, and the battery devices are provided with a power detection unit and a power switch; and a power balance controller The signal is connected to the power detecting unit, and the power detecting unit controls the operation of the power switch; and the plurality of connecting wires are respectively connected to the positive terminal and the negative terminal of the battery device, and the other One end is connected to at least one load unit; thereby, the power balance controller receives the power information detected by the power detection unit, and then further controls the opening and closing of the power switches according to the power information, and the creation does not need to connect a parallel circuit The structure or the connection of an external parallel device can achieve the functions of fast balancing speed, high efficiency and simple control.

Description

Battery power management device

This creation is related to a power management device, especially a battery power management device for electric vehicles or other motorized devices.

According to the evolution of the load equipment of electric vehicles, the difference in specifications has become larger and larger. When the load needs to be expanded, the original power supply capacity may be insufficient, or as the reliability requirements become higher and higher, the battery power system is designed to Modular, parallel and redundant requirements are also an inevitable trend.

In addition to the characteristics of the foregoing battery power system, in addition to the need to add modules to expand capacity, on the other hand, when some of the battery components are damaged, it must be replaced immediately to ensure the reliability of the system; under the above requirements, when the battery has When a replacement or expansion situation occurs, how to prevent the battery module from being damaged due to excessive instantaneous overcurrent between the battery modules, or the dangerous overheating state caused by the overcurrent, etc. It is the key technology for future battery systems and power systems with scalability and safety features.

In addition, the conventional charging power system does not accurately match the capacity of the battery pack, and the battery pack may also suffer from imbalance. Due to manufacturing changes between battery packs, such battery pack imbalances can exist in new batteries, and when the battery pack capacity declines at different rates over time, the unbalanced battery pack or one of its bad cells has a reduction The problem of overall capacity means that a battery pack with a lower state of charge can never be fully charged.

It should be further explained that, in general, a charging power system is usually connected to a battery pack by connecting a parallel circuit structure or an external paralleler to switch the power supply of the battery and balance the power between the batteries. However, when users expand the battery, When replacing or replacing the battery, the parallel circuit structure or the external parallel device must be separated first, which will also be difficult to replace. Furthermore, the parallel circuit structure or the external parallel device will increase the interior of the electronic device in which the charging power system is installed. Volume and cost.

Therefore, after observing the above-mentioned shortcomings, the creator of this case has produced this creation.

The main purpose of this creation is to provide a battery power management device, which is connected to the power detection unit in a plurality of battery devices through a power balance controller signal, so as to detect and control the charge and discharge of these battery devices. In a low-cost state, it can effectively achieve balanced protection of multiple battery devices with different voltages to ensure the reliability of the parallel structure. When the capacity of the battery is to be expanded, it is not necessary to connect a parallel circuit structure or an external paralleler, that is, It can achieve the purpose of fast balancing speed, high efficiency and simple control.

The secondary purpose of this creation is to provide a battery power management device, which can ensure that any battery device will not be overcharged or over discharged, and the balance of the discharge can also effectively extend the battery life. It is important This creative department can increase the battery life without adding any extra hardware.

In order to achieve the above purpose, the battery power management device provided by this creation includes: a plurality of battery devices each having a positive terminal and a negative terminal, and a power detection unit is provided in the battery devices And a power switch; a power balance controller, which is connected to the power detection unit through a signal, and controls the operation of the power switch through the power detection unit; and a plurality of connection wires, one of which is respectively connected to the The positive terminal and the negative terminal of the battery device, and the other ends of the connecting wires are connected to at least one load unit.

Preferably, a battery management system (BMS) is provided in the battery device, the power management system has the power switch, and the power detection unit is electrically connected to the power management system.

Preferably, a power switch in the battery device is used to control the conduction of the positive terminal.

Preferably, a current limiting unit is further provided in the battery devices, and the current limiting unit is connected to a control switch, and the control on relationship is connected to the power management system.

Preferably, the power detection unit is a signal connected to the power balance controller in a wireless signal transmission manner.

Preferably, the wireless signal transmission method is selected from the group of wireless signal transmission methods selected from the group consisting of Bluetooth, infrared (IR), wireless local area network (Wi-Fi), and wireless local area network (WLAN). , Wireless communication (ZigBee), wireless communication (Z-wave) and short-range wireless communication (NFC).

Preferably, the battery devices are connected to the power balance controller through a signal line, and are provided for the power detection unit to signally connect to the power balance controller through a wired signal transmission method.

Preferably, the power balance controller further controls the opening and closing of the power switches according to the power amount information detected by the power detection units, so that at least one of the battery devices is discharged.

Preferably, the power balance controller further controls the opening and closing of the power switches according to the power amount information detected by the power detection units, so that the battery devices are balancedly discharged.

Preferably, the power balance controller further controls the opening and closing of the power switches according to the power information detected by the power detection units, so that at least one of the battery devices with a higher power passes through the connecting wires. , To further charge another low-battery battery device.

The battery power management device provided by this creation mainly receives the power information detected by the power detection unit of the battery devices through the power balance controller, and then the power balance controller further controls the power based on the power information The opening and closing of the power switch; by this, the creation can effectively achieve the balanced protection of multiple battery devices with different voltages at a low cost, ensuring the reliability of these battery devices when connected in parallel, and expanding the power supply. When the battery capacity is reached, the effects of fast balancing speed, high efficiency, and simple control can be achieved without connecting a parallel circuit structure or connecting an external paralleler.

Please refer to FIG. 1 and FIG. 2, which are block diagrams and circuit diagrams of a device according to a first embodiment of the present invention. A battery power management device 100 is disclosed. The battery power management device 100 includes:

A plurality of battery devices 10 each have a positive electrode connection terminal 11 and a negative electrode connection terminal 12, and a power detection unit 13 and a power switch 141 are provided in the battery devices 10. The power switch 141 is used to control the positive electrode. The connection terminal 11 is turned on. In this embodiment, a battery management system 14 (Battery Management System, BMS) is provided in the battery device 10, and the battery management system 14 (BMS) has the power switch 141. Moreover, the power detection unit 13 is electrically connected to the power management system 14; in addition, as shown in FIG. 2, a current limiting unit 15 is further provided in the battery devices 10, and the current limiting unit 15 is connected to a control The switch 16 is connected to the power management system 14 (BMS).

A power balance controller 20 is connected to the power detection unit 13 through a signal, and controls the operation of the power switch 141 through the power detection unit 13. In this embodiment, the power detection unit 13 is a wireless signal The transmission method is connected to the power balance controller 20, and the wireless signal transmission method is selected from the wireless signal transmission method selected from Bluetooth, infrared (IR), and wireless LAN (Wi-Fi). , Wireless local area network (WLAN), wireless communication (ZigBee), wireless communication (Z-wave), and short-range wireless communication (NFC).

A plurality of connection wires 30, one end of which is respectively connected to the positive connection terminal 11 and the negative connection terminal 12 of the battery device 10, and the other end of which is connected to at least one load unit 201; In this embodiment, the load unit 201 can be a load element in the electric vehicle 200 device, for example, a drive motor, a headlight, a direction light, a controller, a display, etc.

In order to further understand the characteristics of the creation, the use of technical means, and the expected effects, I will describe the use of this creation, I believe that we can have a deeper and more specific understanding of this creation, as follows:

Please refer to FIG. 2, and cooperate with FIG. 3 and FIG. 4, which are a schematic circuit diagram and a usage diagram of the first embodiment of the present invention, which show the implementation of the present invention applied to an electric vehicle 200; At this time, the power balance controller 20 receives the power information detected by the power detection unit 13 of the battery devices 10, and has the following power control execution procedures:

First, when the power information is that the power of one of the battery devices 10 is lower than that of the other battery devices 10 and lower than a preset value set by the power balance controller 20, the power balance controller 20 makes the power low The power detection unit 13 in the battery device 10 controls the power switches 141 to be in an open state, so that at least one of the battery devices 10 is discharged.

Second, when the power information is that one of the battery devices 10 has a lower power than the other battery devices 10 and is near a preset value set by the power balance controller 20, the power balance controller 20 makes the power lower. The power detection unit 13 in the battery device 10 and the power management system 14 (BMS) control the output, so that the battery devices 10 perform balanced discharge.

Third, when the power information is that the power of one of the battery devices 10 is lower than that of the other battery devices 10, and lower than the preset value set by the power balance controller 20, the power balance controller 20 is a signal to control these The power detection unit 13 of the battery device 10 and the battery management system 14 (BMS), so that the battery devices 10 with higher power can further pass through the connecting wires 30 to another battery with lower power. The device 10 is charged.

In this way, this creative system can efficiently achieve the balanced protection of multiple battery devices 10 with different voltages at a low cost, ensuring the reliability of these battery devices 10 in parallel, and when the capacity of the battery is to be expanded. It is not necessary to connect a parallel circuit structure or an external paralleler to achieve the effects of fast balancing speed, high efficiency and simple control.

Please refer to FIG. 5, which is a schematic diagram of the second embodiment of this creation. Compared with the first embodiment, this embodiment is different in that the battery devices 10 are connected to the battery device through at least one signal line 40. The power balance controller 20 is provided for the power detection unit 13 to signally connect to the power balance controller 20 in a wired signal transmission manner; more specifically, the power balance controller 20 of this embodiment uses the signal line 40 Receive the power amount information detected by the power detection unit 13 of the battery devices 10 and execute the power control execution procedures described above; thus, this embodiment can also achieve the same effect as the first embodiment.

It is worth mentioning that this creation uses the current limiting unit 15 and the control switch 16 to connect the battery management system 14 (BMS) settings, so as to prevent the battery device 10 with low power from being charged. The over-current and over-charge situations occur in other words, in other words, the current limiting unit 15 and the control switch 16 can effectively achieve the balance protection when the battery devices 10 are connected in parallel, and solve the problem that the battery devices 10 of different voltages are connected in parallel. Charge and discharge cause safety problems.

Hereby, the characteristics of this creation and its expected effects can be stated as follows:

The battery power management device 100 of this creation is mainly receiving the power information detected by the power detection unit 13 of the battery devices 10 through the power balance controller 20, and then the power balance controller 20 is further based on the power information The opening and closing of the power switches 141 are controlled.

In this way, this creative system has the following implementation and technical effects:

For one, this creation is connected to the power detection unit 13 in the plurality of battery devices 10 through the signal of the power balance controller 20, so as to detect and control the charge and discharge of these battery devices 10, and can be efficient at a low cost. Balanced protection of multiple battery devices 10 with different voltages is achieved to ensure the reliability of these battery devices 10 in parallel, and when the capacity of the battery is to be expanded, it is not necessary to connect a parallel circuit structure or an external paralleler, that is, It can achieve the purpose of fast balancing speed, high efficiency and simple control.

Secondly, this creative department can ensure that any battery device 10 will not be overcharged or over-discharged, and the balance of the discharge can also effectively extend the battery life. It is important that this creative department can Increased battery life without any additional hardware conditions.

In summary, this creation has excellent progress and practicality among similar products. At the same time, it has traversed domestic and foreign technical data on such structures. It has not been found in the literature that the same structure exists first. Therefore, This creation has already possessed the new type of patent elements, and the application was filed in accordance with the law.

However, the above are only the preferred and feasible embodiments of this creation. Therefore, any equivalent structural changes applied to the description of this creation and the scope of patent application should be included in the scope of patent of this creation.

100‧‧‧Battery Power Management Device
10‧‧‧ Battery Device
11‧‧‧ Positive connection
12‧‧‧ Negative terminal
13‧‧‧Power Detection Unit
14‧‧‧Power Management System
141‧‧‧Power Switch
15‧‧‧ current limiting unit
16‧‧‧Control switch
20‧‧‧Power balance controller
30‧‧‧ connecting lead
40‧‧‧ signal line
200‧‧‧ electric car
201‧‧‧Load Unit

FIG. 1 is a block diagram of a device according to a first embodiment of the present invention. FIG. 2 is a schematic circuit diagram of the first embodiment of the present invention. FIG. 3 is a schematic diagram of the use of the first embodiment of this creation. FIG. 4 is a schematic diagram of using the first embodiment of the present invention in an electric vehicle. FIG. 5 is a schematic diagram of the second embodiment of the present invention.

Claims (10)

A battery power management device includes: a plurality of battery devices each having a positive terminal and a negative terminal, and the battery devices are provided with a power detection unit and a power switch; a power balance control A signal connected to the power detection unit and controlling the operation of the power switch through the power detection unit; and a plurality of connection wires, one of which is connected to the positive connection terminal of the battery device and the The negative terminal, and the other end of the connecting wires are connected to at least one load unit; wherein the power balance controller receives the power information detected by the power detection unit of the battery devices, and then the power balance controller It is based on the power information to further control the opening and closing of these power switches. The battery power management device according to item 1 of the scope of patent application, wherein the battery device is provided with a power management system, the power management system is provided with the power switch, and the power detection unit is electrically connected to the power supply. Management system. The battery power management device according to item 2 of the scope of the patent application, wherein a power switch in the battery device is used to control the conduction of the positive terminal. The battery power management device according to item 2 of the scope of the patent application, wherein a battery current limiting unit is further provided in the battery devices, and the current limiting unit is connected to a control switch, and the control-on relationship is connected to the power management. system. According to the battery power management device described in item 1 of the scope of patent application, wherein the power detection unit is connected to the power balance controller by means of wireless signal transmission. The battery power management device according to item 5 of the scope of the patent application, wherein the wireless signal transmission method is selected from the wireless signal transmission method selected from Bluetooth, infrared (IR), and wireless local area network ( Wi-Fi), wireless local area network (WLAN), wireless communication (ZigBee), wireless communication (Z-wave), and short-range wireless communication (NFC). The battery power management device according to item 1 of the scope of the patent application, wherein the battery devices are connected to the power balance controller through at least one signal line, and are provided for the power detection unit to connect to the signal by wired signal transmission. Power balance controller. According to the battery power management device described in item 1 of the scope of the patent application, wherein the power balance controller further controls the opening and closing of the power switches based on the power amount information detected by the power detection units, so that at least A battery device is discharged. According to the battery power management device described in item 1 of the scope of patent application, wherein the power balance controller further controls the opening and closing of the power switches according to the power amount information detected by the power detection units, so that the power switches The battery unit performs a balanced discharge. According to the battery power management device described in item 1 of the scope of the patent application, wherein the power balance controller further controls the opening and closing of the power switches based on the power amount information detected by the power detection units, so that at least A battery device with a higher charge can further charge another battery device with a lower charge through the connecting wires.