Battery internal resistance measuring equipment

Abstract

The utility model relates to the technical field of batteries, in particular to battery internal resistance measuring equipment. The utility model provides a battery internal resistance measuring device comprising a plurality of batteries, a plurality of control switches, at least one sampling resistor and a voltage detector, and the plurality of batteries, the plurality of control switches, the at least one sampling resistor and the voltage detector form a parallel circuit. The plurality of batteries and the plurality of control switches are respectively and correspondingly arranged on a plurality of different branch circuits, the sampling resistors are all arranged on the main circuit, the voltage detector is used for detecting the voltage of the batteries, and the plurality of control switches and the voltage detector are connected with a single chip microcomputer. The sampling resistor, the plurality of control switches and the plurality of batteries form a parallel circuit, and the single chip microcomputer controls the opening and closing of the control switches to continuously measure the internal resistance of the plurality of batteries, so that the detection efficiency is improved. In addition, the internal resistance of the battery can be detected in real time through the single-chip microcomputer, and the timeliness of the detection of the internal resistance of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery internal resistance measuring device. Background Technology

[0002] With the advent and widespread adoption of 4G and 5G networks, the stability of power supply to mobile base stations is becoming increasingly important. UPS battery banks have become a key focus for regulatory authorities, as their operational status directly determines the stability of power supply to mobile base stations. Therefore, monitoring these battery banks has become a necessary consideration.

[0003] Currently, battery packs are used in tower and mobile core equipment rooms. Each battery pack contains multiple cells. The current method is to detect voltage and passively test internal resistance. This method can only test one cell at a time and requires multiple operations to test the entire battery pack, resulting in low testing efficiency. Utility Model Content

[0004] To address the technical problem of low testing efficiency caused by using voltage detection and passive internal resistance testing methods, which can only test one battery at a time and requires multiple operations to test the entire battery pack, one objective of this utility model is to provide a battery internal resistance measuring device.

[0005] To achieve the above objectives, an embodiment of this utility model provides a battery internal resistance measuring device, including multiple batteries, multiple control switches, at least one sampling resistor and voltage detector. The multiple batteries, multiple control switches, at least one sampling resistor and voltage detector form a parallel circuit. The multiple batteries and multiple control switches are respectively arranged on multiple different branches. The sampling resistors are all arranged on the main branch. The voltage detector is used to detect the battery voltage. The multiple control switches and the voltage detector are connected to a microcontroller.

[0006] In the above technical solution, the voltage detector is an operational amplifier.

[0007] In the above technical solution, the control switch is an optocoupler relay.

[0008] Additional aspects and advantages of this invention will become apparent in the description that follows, or may be learned by practice of this invention. Attached Figure Description

[0009] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0010] Figure 1 This is the circuit schematic diagram of this utility model;

[0011] Figure 2 This is the control principle diagram of this utility model; Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0013] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0014] The following reference Figures 1 to 2 This invention describes some embodiments of a battery internal resistance measuring device. It includes multiple control switches, at least one sampling resistor, and a voltage detector. The multiple control switches, at least one sampling resistor, and voltage detector form a parallel circuit. The multiple control switches are respectively located on multiple different branches, and the sampling resistors are all located on the main branch. The voltage detector is used to detect the battery voltage. It also includes a microcontroller connected to the control switches and the voltage detector.

[0015] The control switch uses an optocoupler relay, which is connected to a microcontroller. The microcontroller can control the opening and closing of the optocoupler relay. Voltage detectors are connected in parallel with each branch. The voltage detectors use operational amplifiers, which are also connected to the microcontroller. The microcontroller controlling the relay's opening and closing is existing technology, as is the microcontroller controlling the operational amplifier; therefore, the two control principles will not be elaborated upon here.

[0016] A parallel circuit is formed by connecting multiple batteries, multiple optocoupler relays, and a sampling resistor via wires. Each branch has one battery and one optocoupler relay, and the main branch has one sampling resistor. An operational amplifier is connected in parallel with each branch. A microcontroller is connected to multiple optocoupler relays and an operational amplifier. When it is necessary to collect the internal resistance of one of the batteries under test, the switch of one of the batteries under test is turned on. At this time, the microcontroller controls the optocoupler relay on the same branch as the battery under test to turn on. At this time, the branch of the battery under test is in an open state. Since the operational amplifier is connected in parallel with each branch, the voltage of the battery under test can be measured and recorded as U1. Subsequently, the microcontroller controls the optocoupler relay on the same branch as the battery under test to turn off. At this time, the battery under test, the optocoupler relay, and the sampling resistor on the same branch are in a powered state. The battery under test discharges, and the voltage of the sampling resistor is measured again by the operational amplifier and recorded as U2. The battery resistance is recorded as R, the sampling resistor is recorded as Rn, and the voltage of the sampling resistor is recorded as U3.

[0017] According to the volt-ampere characteristic, since the sampling resistor Rn is known, the current I = U3 / Rn = (U1-U2) / Rn;

[0018] Then the battery resistance R = U2 / I = U2 / (U3 / Rn) = U2Rn / (U1-U2).

[0019] Once the internal resistance of one battery is measured, the battery that has been measured is turned off. The microcontroller controls the optocoupler relay on the tested battery branch to open, and then the other unmeasured battery is turned on again. The principle of resistance measurement is the same as described above, and will not be elaborated further here. This process is repeated until the internal resistance of each battery has been measured. This structure allows for continuous testing of multiple batteries without having to rewire after each resistance measurement, thus improving efficiency.

[0020] It is important to note that the relay should not be turned off for too long, as this will cause the battery to discharge continuously. The time should be controlled to around 10 milliseconds. The current sampling resistor should be selected based on the battery voltage to keep the circuit discharge current between 1 and 2 amps.

[0021] This invention has the following advantages: By forming a parallel circuit with a sampling resistor, multiple control switches, and multiple batteries, and controlling the opening and closing of the multiple control switches via a microcontroller, the internal resistance of multiple batteries can be continuously measured, thus improving detection efficiency. Furthermore, the microcontroller allows for real-time detection of battery internal resistance, improving the timeliness of battery internal resistance detection.

[0022] In this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0023] In the description of this utility model, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery internal resistance measuring device characterized by comprising: The application relates to a battery internal resistance measuring device, which comprises a plurality of batteries, a plurality of control switches, at least one sampling resistor and a voltage detector, the plurality of batteries, the plurality of control switches, the at least one sampling resistor and the voltage detector form a parallel circuit, the plurality of batteries and the plurality of control switches are respectively arranged on a plurality of different branches, the sampling resistor is arranged on a trunk line, the voltage detector is used for detecting the battery voltage, and the plurality of control switches and the voltage detector are connected with a single-chip microcomputer.

2. The battery internal resistance measuring device according to claim 1, wherein the voltage detector is an operational amplifier.

3. The battery internal resistance measuring device according to claim 1, wherein the control switch is an optocoupler relay. ​ ​

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