CN205581279U - Lithium battery protection circuit board convenient to test - Google Patents

Abstract

The utility model provides a lithium battery protection circuit board convenient to test, includes protection circuit board main part, the B+ foot electricity of protection circuit board main part is connected with a test point, is VM foot electricity connected with a test point, B the foot electricity is connected with a test point, is P+ foot electricity connected with a test point, P the foot electricity is connected with a test point, and D foot electricity is connected with a test point, and C foot electricity is connected with a test point, and ID foot electricity is connected with a test point, and field effect transistor Q1's drain electrode electricity is connected with a test point. The utility model provides a has set up nine test points, has makeed when the test protection circuit board performance through these nine test points, the probe need not and the components and parts direct contact that is tested to avoid the probe to damage in test procedure and surveyed components and parts. Can also make simultaneously the probe be connected with quilt survey components and parts electricity more easily, effectively solve the probe and contacted poor problem by the survey components and parts. So not only the protecting component can be be favorable to, the efficiency of software testing and the degree of accuracy can be improved again.

Description

A kind of lithium battery protection circuit plate being easy to test

Technical field

This utility model relates to field of lithium, a kind of lithium battery protection circuit plate being easy to test.

Background technology

Widely available along with electronic product, especially mobile phone, panel computer, the electronic product fast development in recent years such as micro projector, lithium battery is high with capacity, and volume is little, the advantage such as can be repeatedly circulated and obtain using widely in battery industry.Protection circuit plate plays an important role in the structure in pond at whole lithium.The structure of protection circuit plate is as shown in Figure 1 at present, existing test mode, mainly with the electric parameter of probe test corresponding element device pin position.Owing to end of probe is relatively sharp-pointed, test process easily causes the damage of components and parts, particularly capacitance resistance ware, needs after damage to investigate one by one, expend man-hour, reduce production efficiency.

Utility model content

In order to solve the problems referred to above, this utility model provides a kind of convenient test, is avoided that again the lithium battery protection circuit plate that components and parts sustain damage.

A kind of lithium battery protection circuit plate being easy to test; including protection circuit plate main body; the B+ foot of described protection circuit plate main body is electrically connected with a test point, and VM foot is electrically connected with a test point, and B-foot is electrically connected with a test point; P+ foot is electrically connected with a test point; P-foot is electrically connected with a test point, and D foot is electrically connected with a test point, and C foot is electrically connected with a test point; ID foot is electrically connected with a test point, and the drain electrode of field effect transistor Q1 is electrically connected with a test point.

Further, the aperture of described test point is 1.5mm.The test point in this aperture not only will not take the space of original protection circuit plate, and can contact with the probe perfection of test.

A kind of lithium battery protection circuit plate being easy to test that this utility model provides is provided with nine test points compared with existing lithium battery protection circuit plate more; make when testing protection circuit plate performance by these nine test points; probe directly need not contact with being test for components and parts, thus avoids probe to damage tested components and parts in test process.By arranging this nine test points, while meeting existing lithium battery protection circuit plate performance test requirement, moreover it is possible to make probe be easier to electrically connect with tested components and parts, efficiently solve the problem that probe contacts difference with tested components and parts.So it is possible not only to beneficially protect element, testing efficiency and accuracy can be improved again.

Accompanying drawing explanation

Fig. 1 is the structural representation of existing lithium battery protection circuit plate；

Fig. 2 is the structural representation of a kind of lithium battery protection circuit plate being easy to test of this utility model.

Detailed description of the invention

In order to preferably this utility model is illustrated, elaborate below in conjunction with accompanying drawing.

As shown in Figure 1; a kind of lithium battery protection circuit plate being easy to test; including protection circuit plate main body; the B+ foot of described protection circuit plate main body is electrically connected with a test point 7; VM foot is electrically connected with a test point 2; B-foot is electrically connected with a test point 8; P+ foot is electrically connected with a test point 6; P-foot is electrically connected with a test point 9; D foot is electrically connected with a test point 5; C foot is electrically connected with a test point 4, and ID foot is electrically connected with a test point 3, and the drain electrode of field effect transistor Q1 is electrically connected with a test point 1.Concrete, the aperture of described test point is 1.5mm.

Concrete, test point 2, test point 7, test point 8 is simulation lithium cell test input test point, in protection board test process, can be simulated the input condition under the different voltages of lithium-ion electric core by dual pathways DC source.Test point 3, test point 4, test point 5, test point 6 and test point 9 are lithium battery output port test point.Test point 4 is the SCL bus of I2C bus, and test point 5 is the SDA bus of I2C bus, and the two test point major function is and test equipment and host communication.In test process, input test point 2, test point 7, test point 8 inputs different voltage, outfan test point 6 and test point 9 and can detect that corresponding output voltage change, can determine that with this defencive function of protection circuit plate plate is the most normal.Concrete, during test under-voltage protection function, dual pathways DC source exports two-way 2.78V respectively to test point 2, test point 7, test point 8.Outfan test point 6 and test point 9 detect that voltage is 0V, can determine that with this under-voltage protection function of protection circuit plate plate is normal.The test point that test point 1 is protected for two-stage nitration; the dual pathways DC source connected when simulation battery core test input test point exports to test point 2 respectively; test point 7; when test point 8 voltage is more than 4.5V; the voltage that test point 1 is tested is 0V, can determine that protection circuit plate two-stage nitration protective loop is normal with this.In whole test process, it is only necessary to contacted with corresponding test point by the probe of test, probe contacts without the pin with components and parts, this avoid the damage of components and parts and improves testing efficiency.It is to be noted above-mentioned nine test points summary and induction that is the applicant on the basis of a large amount of practices combine the structure of existing lithium battery protection circuit plate and a kind of structure design of visualizing, it can meet the performance test requirement of existing lithium battery protection circuit plate.It is that persons skilled in the art cannot be expected.

Above-mentioned specific embodiment is the description to a kind of detailed description of the invention of the present utility model; it is not intended that right of the present utility model is limited; those skilled in the art make insubstantial modifications according to this utility model content, it is considered that fall in this utility model protection domain.

Claims (2)

1. the lithium battery protection circuit plate being easy to test; including protection circuit plate main body; it is characterized in that: the B+ foot of described protection circuit plate main body is electrically connected with a test point; VM foot is electrically connected with a test point; B-foot is electrically connected with a test point; P+ foot is electrically connected with a test point; P-foot is electrically connected with a test point; D foot is electrically connected with a test point; C foot is electrically connected with a test point; ID foot is electrically connected with a test point, and the drain electrode of field effect transistor Q1 is electrically connected with a test point.

A kind of lithium battery protection circuit plate being easy to test, it is characterised in that: the aperture of described test point is 1.5mm.