CN218350411U - Lithium battery protection board detection device - Google Patents

Abstract

The utility model provides a lithium cell protection shield detection device, it includes super capacitor, the voltmeter parallelly connected with super capacitor still includes the load, super capacitor with load detachably connects in the both ends of protection shield respectively, still includes external power source, external power source can give super capacitor charges. And a variable resistor is connected in series between the super capacitor and the protection board. The load adopts a resistor with adjustable resistance.

Description

Lithium battery protection board detection device

Technical Field

The invention relates to a detection device, in particular to a lithium battery protection board detection device.

Background

Lithium batteries are widely used in various industries as an important energy storage device. The lithium cell when charging, need prevent that charging voltage is too high, when discharging, need prevent that discharging voltage is low excessively, all have lithium cell protection shield with the supporting use of lithium cell at present to avoid overcharging and overdischarging. However, the lithium battery protection board does not generally measure the specific values of the charging voltage and the over-discharge voltage when leaving the factory, but only detects whether the lithium battery protection board can be charged, so that certain defective products exist, and the defective products cannot well protect the battery. If the defective products are applied to the protection of lithium batteries, economic loss will be caused. In addition, in practice, since the charging and discharging time of the lithium battery is long, if the quality of the protection board is detected through charging and discharging the lithium battery, a lot of time is consumed, and the method is difficult to be applied in practical production.

The lithium battery protection board is provided with 4 wiring ends which are respectively connected with the anode and the cathode of the lithium battery and the anode and the cathode of the load.

Disclosure of Invention

In order to solve the technical problem, the invention provides a lithium battery protection board detection device which comprises a super capacitor, a voltmeter connected with the super capacitor in parallel, a load, an external power supply and a control unit, wherein the super capacitor and the load are respectively detachably connected to two ends of a protection board, and the external power supply can charge the super capacitor.

Preferably, a variable resistor is connected in series between the super capacitor and the protection board.

Preferably, the load adopts a resistor with adjustable resistance.

Preferably, the connection between the super capacitor, the load and the protection plate is by a quick clamping device.

Preferably, the quick clamping device is an alligator clamp.

Preferably, the external power source and the load are connected with the protection board through a single-pole double-throw switch, so that only one of the external power source and the load is connected with the protection board at the same time.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic circuit diagram of the present invention.

In the figure: 1-bottom plate, 2-super capacitor, 3-alligator clip, 4-binding post, 5-charge and discharge switch, 6-load, 7-external power socket and 8-wiring terminal.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the lithium battery protection board detection device comprises a super capacitor 2, a voltmeter (not shown in the figure) connected in parallel with the super capacitor, and a load 6, wherein the super capacitor 2 and the load 6 are respectively detachably connected to two ends of the protection board, and a specific detachable manner is to adopt a quick clamping device. In this embodiment the quick clamping means are alligator clips 7 and terminals 8, the terminals 8 being resilient open terminal elements. The above elements are all mounted on the base plate 1. And the voltmeter V2 is connected in parallel with two ends of the super capacitor through the wiring terminal 4. Still include external power source, external power source is inserted by external power socket, external power source pass through charge and discharge switch 5 connect in the load end of protection shield, its connected mode can be through plug quick connection. The load 6 controls the on-off of the circuit thereof through the charge and discharge switch 5, thereby controlling the discharge of the load to the super capacitor; the external power supply controls the on-off of the circuit thereof through the charge-discharge switch 5, thereby controlling the charging of the super capacitor by the external power supply.

Preferably, a variable resistor is connected in series between the super capacitor and the protection board.

Preferably, the load adopts a resistor with adjustable resistance.

In the embodiment, use super capacitor to replace the lithium cell, can avoid the too slow problem of detection efficiency that causes of lithium cell charge-discharge speed, super capacitor's charge-discharge time can be accomplished in a few seconds, just so can be quick detect the protection shield.

The circuit schematic of the above elements is shown in fig. 2. P1 and P2 in the circuit diagram correspond to 2 terminals in the terminal 8 in fig. 1, respectively, i.e., two terminals of the terminal 8 are connected to the load 6 through the single-pole double-throw switch K. U1 and U2 in the circuit diagram correspond to alligator clip 2 in fig. 1, respectively. The single-pole double-throw switch K in the circuit diagram corresponds to the charge and discharge switch 5 in fig. 1.

When the protection shield needs to be detected, the protection shield is connected into the circuit through the alligator clip 2 and the wiring terminal 7, and the charging and discharging detection is realized by controlling the charging and discharging switch 5. The specific working principle is as follows.

The working principle of detecting the highest charging voltage is as follows: the single-pole double-throw switch K is closed upwards, the positive plate and the negative plate of the external power supply E are respectively connected to the P1 point and the P2 point of the protection plate, the super capacitor C is charged through the protection plate, the charged voltage can be read through the voltmeter V2, and when the reading of the voltmeter V2 does not rise any more, the overcharge protection voltage is provided by the protection plate. The charging current can be adjusted by the variable resistor R1.

The working principle of detecting the lowest discharge voltage is as follows: the single-pole double-throw switch K is closed downwards, the external power supply E is disconnected, the super capacitor C serves as a battery and supplies power to the load R2, the discharging voltage can be read out through the voltmeter V2, and when the reading of the voltmeter V2 does not fall any more, the discharging protection voltage is provided by the protection board. The discharge current can be adjusted by the variable resistor R2. The discharge current can be adjusted by the variable resistor R2.

The charging voltage of the external power source E can also be detected by the voltmeter V1, so as to ensure that the external power source can provide a sufficient charging voltage.

And after the detection is finished, the crocodile clip 2 and the wiring terminal 7 are opened, and the protection plate is taken down. The next protective plate can be quickly connected as required.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (6)

1. The utility model provides a lithium cell protection shield detection device which characterized in that: including super capacitor, with the parallelly connected voltmeter of super capacitor, still include the load, super capacitor with the load detachably connects in the both ends of protection shield respectively, still includes external power source, external power source can give super capacitor charges.

2. The lithium battery protection board inspection device as claimed in claim 1, wherein: and a variable resistor is connected in series between the super capacitor and the protection board.

3. The lithium battery protection board inspection device as claimed in claim 1, wherein: the load adopts a resistor with adjustable resistance.

4. The lithium battery protection board inspection device as claimed in claim 1, wherein: the super capacitor, the load and the protection board are connected by a quick clamping device.

5. The lithium battery protection board inspection device as claimed in claim 4, wherein: the quick clamping device is an alligator clip.

6. The lithium battery protection board inspection device as claimed in claim 1, wherein: the external power supply and the load are connected with the protection board through the single-pole double-throw switch, so that only one of the external power supply and the load is connected with the protection board at the same time.

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