CN202167877U - A lead-acid battery device - Google Patents

Abstract

The utility model provides a lead-acid battery device, which belongs to the technical field of batteries. It solves the problem that the existing battery pack cannot measure the individual voltage of each individual battery connected in series. The lead-acid battery device includes a casing with a plurality of output holes, a battery pack arranged in the casing, and a positive terminal and a negative terminal respectively connected to the positive pole and the negative pole of the battery pack, and the positive terminal and the negative terminal Both extend out of the casing through the above-mentioned output holes. The battery pack includes several battery individuals connected in series in sequence. The lead-acid battery device also includes several secondary terminal posts connected between the above-mentioned two adjacent battery individuals. The other end of the pole opposite to the individual battery is used for connecting with a battery management system (BMS). The lead-acid battery device enables the battery management system to measure the individual voltage of the battery, and then coordinates to improve the power supply performance of the battery pack.

Description

A lead-acid battery device

technical field

The utility model belongs to the technical field of batteries and relates to a lead-acid battery device, in particular to a lead-acid battery device for a battery pack in an automobile.

Background technique

Batteries are a kind of power source commonly used by people. It is small in size and easy to carry, and can supply power for almost all small household appliances. It plays a very important role in people's daily life. In order to meet the power supply requirements of large electrical appliances, people began to connect small batteries in series or in parallel to provide larger voltage or current for large electrical appliances.

The battery pack in the car is to provide enough energy for the electrical appliances in the car by connecting multiple batteries in series, parallel or in combination. At present, the battery pack used in the car generally includes several individual batteries connected in series and parallel, a casing arranged outside the series and parallel connected battery pack, and a positive terminal and a negative terminal respectively connected to the positive and negative poles of the battery pack. When in use, the positive and negative terminals can be connected directly, and the operation is simple and convenient.

However, only the total voltage of the battery pack can be measured from the positive terminal and the negative terminal of the above-mentioned battery pack, and the voltage of each individual battery cannot be measured, so as to understand its state. trouble. Whether the voltage of each individual battery in series is balanced will affect the power supply performance of the entire battery pack. The lead-acid battery pack in the prior art cannot know the state of each individual battery, that is, it cannot guarantee the safety of the individual batteries in the lead-acid battery pack. Balance, performance needs to be improved.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problems in the prior art, and propose a lead-acid battery device that can accurately understand the voltage of each individual battery after being connected in series during the test.

The purpose of this utility model can be achieved through the following technical solutions:

A lead-acid battery device, comprising a housing with a plurality of output holes, a battery pack arranged in the housing, and a positive terminal and a negative terminal respectively connected to the positive and negative poles of the battery pack, the positive terminal Both the negative terminal and the negative terminal extend out of the casing through the above output hole. The battery pack includes several individual batteries connected in series, and the lead-acid battery device also includes several The other end of the secondary terminal relative to the connection with the individual battery is used to connect with a battery management system (BMS).

The acquisition end of the battery management system (BMS) is connected to each terminal of the lead-acid battery device through a signal line, and the potential information at each terminal can be obtained. After processing these potential information, the voltage of each battery and the entire battery pack can be obtained. information. After knowing the information, the operator can balance each individual battery according to the specific situation.

In the aforementioned lead-acid battery device, there are six individual batteries, five secondary terminals, and two output holes.

In the above-mentioned lead-acid battery device, the output hole is opened on one side of the casing. Setting the output hole on the same side of the housing can facilitate the connection of the positive and negative terminals protruding from the output hole of the housing with the external wiring.

Compared with the prior art, in this lead-acid battery device, a secondary terminal is set between two adjacent battery individuals in the battery pack, and the secondary terminal is connected to the battery management system (BMS) through a signal line, and the battery management system (BMS) can collect individual battery voltage information from each secondary terminal, and the operator can perform equalization processing on the battery pack based on this information to improve the performance of the battery pack power supply.

Description of drawings

Fig. 1 is a structural schematic diagram of the lead-acid battery device.

Fig. 2 is a schematic diagram of the test principle of the lead-acid battery device.

In the figure, 1. housing; 1a, output hole; 2. positive terminal; 3. negative terminal; 5. secondary terminal.

Detailed ways

The following is the specific implementation of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figure 1, the lead-acid battery device includes a housing 1 with a plurality of output holes 1a, a number of individual batteries arranged in series in series in the housing 1, and a positive electrode and a negative electrode respectively connected to the individual batteries after series connection. The positive terminal 2 and the negative terminal 3 and several secondary terminals 5 respectively connected between two adjacent battery cells. In this embodiment, there are six individual batteries, all of which are lead-acid batteries; The other ends of the positive terminal 2 and the negative terminal 3 that are connected to the individual battery protrude from the output hole 1a of the housing 1, while the other end of the secondary terminal 5 passes through the housing 1 through the signal line. The opening on the top is connected to the battery management system BMS.

When it is necessary to detect the voltage of the single cells of the lead-acid battery device in order to judge the balance of the battery pack, the test process is shown in Figure 2. In the figure, the terminals from left to right are the negative terminal 3 and the secondary terminal. Post 1, secondary post 2, secondary post 3, secondary post 4, secondary post 5, and positive post 2; the individual batteries are battery 1, battery 2, battery 3, and battery from left to right Four, battery five and battery six. Several acquisition terminals of the battery management system (BMS) used to test and debug the individual voltage of each battery are respectively connected to the seven terminals of the lead-acid battery device, and the acquisition terminal can collect the potential information at the seven terminals And send it to the battery management system (BMS) for processing.

In the detection data, the output point of the negative terminal 3 is taken as a reference point (its potential is 0), and the potential measured at one of the secondary terminal is the voltage of the battery one. The potential measured at the second terminal of the secondary terminal is the sum of the voltage values of the first battery and the second battery, and the difference between this voltage and the voltage measured at the first terminal of the secondary terminal is the voltage of the second battery. By analogy, the voltage value at the corresponding individual battery can be obtained by making a difference between the voltage value measured at the latter terminal and the voltage value measured at the previous terminal. After the data detection is completed, the operator can understand the voltage status of each individual battery in the battery pack based on the measured data and judge whether it is balanced. If the measured data indicates that the voltage of each individual battery in the battery pack is unbalanced, the corresponding The individual batteries are adjusted to achieve the best power supply performance of the battery pack.

In addition, the number of individual batteries and secondary terminals 5 in the lead-acid battery device can be appropriately increased or decreased according to different actual usage requirements.

The specific examples described herein are only to illustrate the spirit of the present utility model. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific examples or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond what is described in the appended claims. defined range.

Claims (3)

1. A lead-acid battery device, comprising a housing (1) with a plurality of output holes (1a), a battery pack arranged in the housing (1) and a positive connection connected to the positive pole and the negative pole of the above-mentioned battery pack respectively post (2) and negative terminal (3), the positive terminal (2) and negative terminal (3) both protrude from the casing (1) through the output hole (1a), and the battery pack includes A plurality of individual batteries connected in series, characterized in that the lead-acid battery device also includes several secondary terminals (5) respectively connected between the two adjacent individual batteries, and the secondary terminals (5) The other end of the column (5) opposite to the connection with the individual battery is used for connection with a battery management system. 2. A kind of lead-acid battery device according to claim 1, is characterized in that, described battery individual is six, and described secondary post (5) is five, and described output hole (1a ) for two. 3. A lead-acid battery device according to claim 1 or 2, characterized in that the output hole (1a) is opened on one side of the housing (1).

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