CN212845817U

CN212845817U - Battery pack detection device

Info

Publication number: CN212845817U
Application number: CN202021479950.4U
Authority: CN
Inventors: 邓兵; 汤万球
Original assignee: Dongguan Fenghui Electronics Co ltd
Current assignee: Dongguan Fenghui Electronics Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-03-30
Anticipated expiration: 2030-07-24

Abstract

The utility model belongs to the technical field of testing tool, concretely relates to group battery detection device, including ADC collection module, ADC conversion module and data processing module, ADC conversion module respectively with ADC collection module and data processing module communication connection, ADC collection module is used for detecting the voltage parameter of electric core, ADC conversion module is used for converting voltage parameter into digital signal and conveys digital signal to data processing module, and data processing module is used for handling digital signal and output testing result. The utility model discloses control is nimble, and the security performance is high, and detection stability is strong, not only can in time obtain the detection data, has still improved the efficiency of detection and the precision that detects.

Description

Battery pack detection device

Technical Field

The utility model belongs to the technical field of testing tool, concretely relates to group battery detection device.

Background

With the social progress, people have higher and higher application range and requirements on energy sources, and more high-voltage and high-power electric equipment are provided. However, the inventors have found that in the conventional battery pack, there are the following problems: 1) as for the voltage of the battery pack, the voltage difference between each string of batteries must be controlled within a certain range, otherwise, the voltage difference between strings is larger and larger in the long-term charge-discharge cycle process of the battery pack, and long-term situations of insufficient charge and over discharge of low-voltage battery cells occur; 2) moreover, the battery cell with high voltage can generate overcharge and incomplete discharge, and when the difference reaches a certain degree, the service life of the whole module can be greatly reduced; 3) when the voltages of the battery packs are not matched seriously, the battery packs may not work or a certain string of batteries is overcharged and overdischarged for a long time to cause explosion risks; 4) the battery protection board sampling circuit is usually through welding earlier, and the rethread connector is to inserting the equipment of going on the board, if a certain sampling line welded position is reverse, light person's group battery can not work, and heavy person can lead to the protection board burning of starting a fire.

Therefore, in order to secure the safety of the battery pack, a new battery pack detection apparatus is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: to the not enough of prior art, provide a group battery detection device, the security performance is high, and detection stability is strong, not only can in time obtain the detection data, has still improved the efficiency of detection and the precision that detects.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a battery pack detection device, includes ADC collection module, ADC conversion module and data processing module, ADC conversion module respectively with ADC collection module with data processing module communication connection, ADC collection module is used for detecting the voltage parameter of electric core, ADC conversion module is used for with voltage parameter conversion digital signal and with digital signal conveys data processing module, data processing module is used for handling digital signal and output testing result.

Furthermore, the ADC acquisition module is provided with an acquisition detection unit, the acquisition detection unit is used for being connected with the battery cell, and the ADC conversion module is in communication connection with the acquisition detection unit.

Furthermore, the number of the acquisition detection units is N, N is more than or equal to 5, the N acquisition detection units are all connected with the ADC conversion module, and the N acquisition detection units jointly form an ADC acquisition circuit of the detection device.

Furthermore, the acquisition detection unit comprises a first resistor, a capacitor and a second resistor, two ends of the capacitor are respectively connected with the first resistor and the second resistor, the first resistor and the second resistor are used for connecting different battery cells, so that the detection requirement of a multi-string battery pack is met, the resistor and the battery cells are connected through a voltage sampling line, and the first resistor and the capacitor form an RC integrating circuit, so that the requirement of ADC data acquisition is met.

Further, one end of the capacitor is connected to the ADC conversion module, so that the voltage parameter of the battery cell is transmitted to the ADC conversion module.

Further, the acquisition detection unit further comprises a diode, the anode of the diode is connected with one end of the capacitor, the cathode of the diode is connected with the ADC conversion module, and the diode is used for detecting the electric signal sent by the ADC conversion module from one end of the capacitor, so that the acquisition detection condition can be known more efficiently and more accurately.

Further, the data processing module is a single chip microcomputer, an arduino controller, a Cortex-M3 controller or a Cortex-M4 controller.

Furthermore, the detection device also comprises a communication module, the communication module is connected with the data processing module, and the communication module is used for sending data to an upper computer or an intelligent terminal.

Further, the communication module is a bluetooth module, a GPRS module or a WiFi module.

Furthermore, detection device still includes prevents reverse connection protection circuit, prevent reverse connection protection circuit with gather the detecting element and connect, prevent reverse connection protection circuit and be used for avoiding detection device to take place the phenomenon of burning, even the phenomenon that voltage sampling line misconnection appears in gathering the testing process, also can not damage ADC collection module with ADC conversion module.

Furthermore, the reverse connection prevention protection circuit is provided with a protection resistor and a triode, one end of the protection resistor is used for being connected with the battery core, and the other end of the protection resistor is connected with the base electrode of the triode.

Furthermore, the triode is an NPN type triode, an emitting electrode of the triode is connected with the acquisition detection unit, and the NPN type triode plays a good role in protection.

The beneficial effects of the utility model reside in that: the utility model discloses a ADC collection module, ADC conversion module and data processing module, ADC conversion module respectively with ADC collection module and data processing module communication connection, ADC collection module is used for detecting the voltage parameter of electric core, and ADC conversion module is used for converting voltage parameter into digital signal to convey data processing module with digital signal, data processing module is used for handling digital signal and output test result, the utility model discloses avoided artifical universal meter detection error and the complicated problem of operation that brings, ADC collection module and ADC conversion module's precision is high, and detection efficiency is high, has satisfied the detection demand of many strings of group batteries.

Drawings

Fig. 1 is a frame diagram of the present invention.

Fig. 2 is a circuit diagram of the ADC acquisition module and the ADC conversion module of the present invention.

Fig. 3 is the reverse connection prevention protection circuit of the present invention.

Fig. 4 is one of the schematic diagrams of the detection results after the communication module is connected with the upper computer.

Fig. 5 is a second schematic diagram of the detection result after the communication module is connected to the upper computer.

Wherein: 1-ADC acquisition module; 2-ADC conversion module; 3-a data processing module; 4-a communication module.

Detailed Description

As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings 1 to 5 and the specific embodiments, but the present invention is not limited thereto.

The utility model provides a group battery detection device, including ADC collection module 1, ADC conversion module 2 and data processing module 3, ADC conversion module 2 respectively with ADC collection module 1 and 3 communication connection of data processing module, communication connection is including electricity connection and wireless connection, ADC collection module 1 is used for detecting the voltage parameter of electric core, ADC conversion module 2 is used for converting the voltage parameter into digital signal, and convey digital signal to data processing module 3, data processing module 3 is used for handling digital signal and output testing result.

Preferably, ADC collection module 1 is provided with the collection detecting element, the collection detecting element is used for connecting electric core, ADC conversion module 2 and collection detecting element communication connection, can know by fig. 2, the quantity of gathering the detecting element is N, 8 is no less than N and is no less than 15, N gathers the detecting element and all is connected with ADC conversion module 2's VC end, N gathers the ADC acquisition circuit that the detecting element constitutes detection device jointly, and, ADC conversion module 2 is provided with the analog-to-digital conversion chip, the analog-to-digital conversion chip includes the U1 part of being connected with the collection detecting element and the Q1 part that is used for the conversion output, the Q1 part of analog-to-digital conversion chip is provided with SMBD end and SMBC end, SMBD end and SMBC end all are connected with data processing module 3, the analog-to-digital conversion chip can select the analog-to-digital conversion chip that the.

Specifically, gather detecting element and include first resistance, electric capacity and second resistance, the both ends of electric capacity respectively with first resistance and second ohmic connection, wherein, first resistance and second resistance are used for connecting different electric cores, thereby satisfy the detection demand of many strings of group batteries, and, in ADC acquisition circuit, every collection detecting element among N collection detecting element passes through capacitive connection, in addition, resistance and electric core pass through the voltage sampling line and connect, first resistance and electric capacity have constituted RC integrating circuit, thereby the demand of ADC data acquisition has been satisfied.

In addition, in the ADC acquisition circuit, one end of each capacitor in the N acquisition detection units is connected to the VC terminal of the ADC conversion module 2, so as to meet the requirement of acquiring ADC data of multiple cells simultaneously.

Preferably, the acquisition detection unit further includes a diode, an anode of the diode is connected to one end of the capacitor, a cathode of the diode is connected to a voltage signal end corresponding to the ADC conversion module 2, the diode is used for detecting an electrical signal sent from one end of the capacitor to the ADC conversion module 2, and the diode may be disposed in one of the N acquisition detection units, so as to more efficiently and more accurately know the conditions of acquisition detection.

Preferably, the detection device further comprises an anti-reverse connection protection circuit, the anti-reverse connection protection circuit is connected with the acquisition detection unit, the anti-reverse connection protection circuit effectively avoids the phenomenon that the detection device burns, the operation safety and stability of the detection device are improved, even if the phenomenon that a voltage sampling line is in a wrong connection in the acquisition detection process is generated, the ADC acquisition module 1 and the ADC conversion module 2 cannot be damaged, and as can be seen from the figure 3, the anti-reverse connection protection circuit is provided with a protection resistor and a triode, one end of the protection resistor is used for being connected with the battery cell, the other end of the protection resistor is connected with the base of the triode, the protection resistor and the triode are arranged in a plurality, and the battery cell, the protection resistor and the triode are equal in number.

Preferably, the triodes are NPN-type triodes, emitters of the triodes are connected to the collecting and detecting unit, which is represented by a signal P-in fig. 3, and emitters of adjacent NPN-type triodes are connected to collectors of the plurality of triodes provided in the anti-reverse connection protection circuit.

Preferably, the data processing module 3 is one of a single chip microcomputer, an arduino controller, a Cortex-M3 controller or a Cortex-M4 controller.

Preferably, the detection device further comprises a communication module 4, the communication module 4 is connected to the data processing module 3, the communication module 4 is configured to send data to an upper computer or an intelligent terminal, the communication module is one of a bluetooth module, a GPRS module or a WiFi module, as can be seen from fig. 4 and 5, the voltage parameter precision of the battery cell can reach a level of 3 bits (mV) after a decimal point, and the battery cell passing detection is displayed as PASS, the battery cell not passing detection is displayed as FAIL, and a striking color is used as a mark, so that a complete loss can be achieved, that is, the present invention can detect the pairing condition of the battery pack and whether the line sequence welding of the battery pack is correct through the voltage of the battery cell, thereby reducing and avoiding the possibility of shortening the service life of the battery and burning out the battery, effectively improving the operation safety of the multi-string battery pack protection board, and, the utility model discloses a voltage and prevent that reverse connection test time can accomplish to accomplish in 5 seconds to the efficiency of production and detection has been improved greatly.

Obviously, the utility model discloses the security performance is high, and detection stability is strong, and detection efficiency is high, has practiced thrift the cost that the manpower detected and calculated, has satisfied the detection demand of many strings of group batteries.

Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A battery pack detection device, characterized by: including ADC collection module (1), ADC conversion module (2) and data processing module (3), ADC conversion module (2) respectively with ADC collection module (1) with data processing module (3) communication connection, ADC collection module (1) is used for detecting the voltage parameter of electric core, ADC conversion module (2) are used for with voltage parameter conversion is digital signal and will digital signal conveys data processing module (3), data processing module (3) are used for handling digital signal and output test result.

2. The battery pack detection apparatus of claim 1, wherein: the ADC acquisition module (1) is provided with an acquisition detection unit, the acquisition detection unit is used for being connected with the battery cell, and the ADC conversion module (2) is in communication connection with the acquisition detection unit.

3. The battery pack detection device according to claim 2, wherein: the acquisition detection unit comprises a first resistor, a capacitor and a second resistor, and two ends of the capacitor are respectively connected with the first resistor and the second resistor.

4. The battery pack detection apparatus according to claim 3, wherein: one end of the capacitor is connected with the ADC conversion module (2).

5. The battery pack detection apparatus according to claim 3, wherein: the acquisition detection unit further comprises a diode, the anode of the diode is connected with one end of the capacitor, and the cathode of the diode is connected with the ADC conversion module (2).

6. The battery pack detection apparatus of claim 1, wherein: the data processing module (3) is a single chip microcomputer, an arduino controller, a Cortex-M3 controller or a Cortex-M4 controller.

7. The battery pack detection apparatus of claim 1, wherein: the detection device further comprises a communication module (4), the communication module (4) is connected with the data processing module (3), and the communication module (4) is used for sending data to an upper computer or an intelligent terminal.

8. The battery pack detection device according to claim 2, wherein: the detection device also comprises an anti-reverse-connection protection circuit, and the anti-reverse-connection protection circuit is connected with the acquisition detection unit.

9. The battery pack detection device according to claim 8, wherein: the reverse connection prevention protection circuit is provided with a protection resistor and a triode, one end of the protection resistor is used for being connected with the battery cell, and the other end of the protection resistor is connected with the base electrode of the triode.

10. The battery pack detection device of claim 9, wherein: the triode is an NPN type triode, and an emitting electrode of the triode is connected with the acquisition detection unit.