Battery pre-charging test device

Abstract

The utility model discloses a battery pre-charging testing device, and relates to the technical field of battery testing. The circuit specifically comprises a capacitor matrix, a resistor matrix, a positive electrode connecting end and a negative electrode connecting end, the capacitor matrix is provided with an input end, an output end and a plurality of capacitor units, and at least part of the capacitor units are connected in parallel and / or in series between the input end and the output end of the capacitor matrix; the resistor matrix is provided with an input end, an output end and a plurality of resistor units, and at least part of resistor units are connected in parallel and / or in series between the input end and the output end of the resistor matrix; the anode connecting end is electrically connected with the input end of the capacitor matrix and the input end of the resistor matrix; the cathode connecting end is electrically connected with the output end of the capacitor matrix and the output end of the resistor matrix. By adopting a mode of combining the capacitor matrix and the resistor matrix and selectively adopting a series connection and / or parallel connection mode, the environment variables of different whole vehicle conditions are simulated, meanwhile, the accuracy of a test result is improved, and the pre-charging test of the battery is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery test technical field, especially relate to a battery precharge testing device. BACKGROUND

[0002] Power battery high pressure precharge test demand is more and more, and power battery is applied to different whole car environment, and the whole car capacitance, resistance value of power battery system precharge in different whole car environment are different, and there are also abnormal precharge demand test (such as precharge short circuit measurement etc.

[0003] In the prior art, power battery pack is carried on the whole car to carry out precharge test, and there are long cycle, high test cost, and precharge short circuit abnormal test, and there is certain risk on the whole car, therefore the environment parameters of actual whole car are converted into corresponding capacitance value and resistance value to build the whole car environment to carry out corresponding precharge test, to improve precharge test efficiency and save test cost, but the existing test equipment can only simulate fixed capacitance / resistance value, it is difficult to realize dynamic parameter combination (for example, capacitance gradient change, resistance mutation scene), and cannot simulate wire harness impedance, contactor action delay and other real environment variables, leading to deviation of test result and actual vehicle working condition.

[0004] Therefore, the application is to solve the problem that the test equipment cannot simulate different whole car environment, which affects the accuracy of test results. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a kind of battery precharge testing device, to optimize test equipment, improve the adjustability of test equipment, to simulate the environment variable of different whole car conditions, and improve the accuracy of test results simultaneously.

[0006] In order to achieve the above purpose, the utility model provides a kind of battery precharge testing device, comprising:

[0007] Capacitance matrix has input, output and a plurality of capacitive units, and at least parallel and / or series connection part of the capacitive units between the input and output of the capacitance matrix;

[0008] Resistance matrix has input, output and a plurality of resistance units, and at least parallel and / or series connection part of the resistance units between the input and output of the resistance matrix;

[0009] Positive connection end, electrically connected the input of the capacitance matrix and the input of the resistance matrix;

[0010] Negative connection end, electrically connected the output of the capacitance matrix and the output of the resistance matrix.

[0011] In the above scheme, the capacitance values of the capacitance matrix selected according to the needs of the whole vehicle can be in series with part of the capacitance units, can be in parallel with part of the capacitance units, or can be in a combination of the two, so as to more accurately achieve the environment of the whole vehicle and improve the accuracy of the test results; the resistance matrix is the same, and the same scheme is adopted.

[0012] Further, at least part of the capacitance units have different capacitance values, and / or at least part of the resistance units have different resistance values.

[0013] Further, the capacitance units in each column of the capacitance matrix have the same capacitance value, and / or the resistance units in each column of the resistance matrix have the same resistance value. The same capacitance value of each column of the capacitance unit facilitates the user to distinguish, facilitates the use of a lead to connect a plurality of capacitance units in turn, improves the selection efficiency, and also appears that a plurality of columns of the capacitance units have the same capacitance value, that is, a commonly used capacitance for testing, which can prevent the existence of damage of part of the capacitance units.

[0014] Further, the capacitance values of the capacitance units in each row of the capacitance matrix are sequentially increased, and / or the resistance values of the resistance units in each row of the resistance matrix are sequentially increased.

[0015] Further, a plurality of the capacitance units of the capacitance matrix have the same capacitance value, and / or a plurality of the resistance units of the resistance matrix have the same resistance value.

[0016] Further, the input end and the output end of the capacitance matrix are respectively electrically connected with a capacitance switch one and a capacitance switch two.

[0017] Further, the input end and the output end of the resistance matrix are respectively electrically connected with a resistance switch one and a resistance switch two.

[0018] Further, a short-circuit test device is connected in series between the positive connection end and the negative connection end, and the short-circuit test device comprises an internal fuse.

[0019] Further, the input end and the output end of the short-circuit test device are respectively electrically connected with a short-circuit switch one and a short-circuit switch two.

[0020] The above technical scheme has the following advantages:

[0021] The utility model discloses a capacitance matrix and resistance matrix are combined with each other, and a plurality of capacitance units and resistance units are arranged in the capacitance matrix and the resistance matrix respectively, and the series connection and / or parallel connection are selectively adopted, and the input end and the output end of the capacitance matrix and the resistance matrix are connected on the positive connection end and the negative connection end respectively, so as to simulate the environmental variable of different whole vehicle conditions, improve the accuracy of the test results, and help the pre-charging test of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be explained in detail below in combination with specific embodiments and drawings, in which:

[0023] Figure 1 It is the schematic diagram of the utility model;

[0024] Figure 2 It is the schematic diagram of the utility model and the connection of battery.

[0025] In the drawing: 1, capacitor matrix;111, capacitor unit;112, capacitor connecting line;2, resistance matrix;211, resistance unit;212, resistance connecting line;213, wire;3, short circuit testing device;311, fuse;4, capacitor switch one;5, capacitor switch two;6, resistance switch one;7, resistance switch two;8, short circuit switch one;9, short circuit switch two;10, positive connection end;11, negative connection end;12, control line. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantage of the utility model more clear, the utility model will be explained in detail below in combination with drawings and embodiments.It should be understood that the following specific embodiments are only used to explain the utility model, and do not constitute the limitation to the utility model.

[0027] As Figure 1 And Figure 2 As shown in a kind of battery pre-charging testing device shown in the drawing, including capacitor matrix 1, resistance matrix 2, positive connection end 10 and negative connection end 11, capacitor matrix 1 has input, output and several capacitor units 111, at least parallel and / or series partial capacitor units 111 between the input and output of capacitor matrix 1;Resistance matrix 2 has input, output and several resistance units 211, at least parallel and / or series partial resistance units 211 between the input and output of resistance matrix 2;Positive connection end 10 is electrically connected to the input of capacitor matrix 1 and the input of resistance matrix 2;Negative connection end 11 is electrically connected to the output of capacitor matrix 1 and the output of resistance matrix 2.The positive and negative poles of battery are communicated with positive connection end 10 and negative connection end 11 respectively, when battery is pre-charged to high voltage, whether battery is normally pre-charged to high voltage is observed by capacitor matrix 1;When battery is executed to high voltage, whether battery can normally execute to high voltage is observed by resistance matrix 2.

[0028] Specifically, the capacitance value of the capacitance matrix 1 is selected according to the needs of the whole vehicle, and the partial capacitance units 111 can be connected in series or in parallel, or in a combination of the two, to more accurately achieve the environment of the whole vehicle and improve the accuracy of the test results; the resistance matrix 2 is similar, and the same scheme is adopted. The positive connection end 10 and the negative connection end 11 are made of any metal material with conductive properties or superconducting non-metallic material, such as copper sheet, nickel sheet, etc., and are connected to the cable of the power battery system by bolts or welding.

[0029] As a first embodiment of the present application:

[0030] As shown in Figure 1 , at least part of the capacitance units 111 have different capacitance values, and / or at least part of the resistance units 211 have different resistance values. Among them, the capacitance units 111 with different capacitance values in the capacitance unit 111 are connected by wires 213 in the capacitance matrix 1 to connect multiple capacitance units 111 in series or parallel, and extend through the capacitance connection line 112 to form the input and output ends of the capacitance matrix 1, simulate the environment of different whole vehicles, and facilitate selection; the resistance unit 211 and the capacitance unit 111 adopt the same technical scheme, that is, multiple resistance units 211 are connected in series or parallel by resistance connection lines 212, which will not be repeated here.

[0031] Further, each column of capacitance units 111 of the capacitance matrix 1 has the same capacitance value, and / or each column of resistance units 211 of the resistance matrix 2 has the same resistance value. In the capacitance matrix 1, the capacitance value of each column of capacitance units 111 is the same, which is convenient for users to distinguish and facilitate the use of wires 213 to connect multiple capacitance units 111 in turn, improve the selection efficiency, and also appear multiple columns of capacitance units 111 with the same capacitance value, that is, the commonly used capacitance for testing, which can prevent the existence of damaged partial capacitance units 111; the resistance matrix 2 is similar to the capacitance matrix 1, and the resistance units 211 are connected in series or parallel by wires 213, and the resistance connection line 212 is used as the input and output ends of the resistance matrix 2.

[0032] Further, the capacitance values of each row of the capacitive units 111 of the capacitance matrix 1 are sequentially increased, and / or the resistance values of each row of the resistive units 211 of the resistance matrix 2 are sequentially increased. In order to improve the consistency of selection, the same capacitance value is used for each column of the capacitive units 111 of the capacitance matrix 1, which can be sequentially increased according to each row of the capacitance matrix 1. This way facilitates users to select the capacitive units 111 with the corresponding capacitance value without long-distance flying wires, and damaged resistors can be replaced along each column, greatly improving the convenience of use. The resistance matrix 2 is connected in series or parallel between the resistive units 211 through the wires 213, and uses the resistance connecting line 212 as the input and output terminals of the resistance matrix 2, which is the same as the capacitance matrix 1.

[0033] As a second embodiment of the present application:

[0034] As shown in Figure 1 , the capacitance matrix 1 has several capacitive units 111 with the same capacitance value, and / or the resistance matrix 2 has several resistive units 211 with the same resistance value. When the capacitive units 111 in the capacitance matrix 1 have the same capacitance value, they can be adjusted to the required capacitance value through a combination of series and parallel connection, without the need to select back and forth according to different capacitance values, reducing the clutter of flying wires. The resistance matrix 2 has the same scheme as the capacitance matrix 1, which will not be described here.

[0035] For the above-mentioned capacitance matrix 1 and resistance matrix 2, the wires 213 can use different schemes, such as relays, MOS tubes, IGBT, etc.

[0036] As shown in Figure 1 , the input and output terminals of the capacitance matrix 1 are respectively electrically connected with the capacitor switch one 4 and the capacitor switch two 5, and the input and output terminals of the resistance matrix 2 are respectively electrically connected with the resistance switch one 6 and the resistance switch two 7. The capacitance matrix 1 is turned on or off through the capacitor switch one 4 and the capacitor switch two 5, which is convenient for high-voltage pre-charging test of the battery. The resistance matrix 2 is turned on or off through the resistance switch one 6 and the resistance switch two 7, which is convenient for high-voltage test of the battery.

[0037] The present application includes a short-circuit test device 3 connected in series between the positive connection end 10 and the negative connection end 11. The short-circuit test device 3 includes an internal fuse 311, which is detachable. According to the test protection requirements, the fuse 311 with the corresponding melting value is added. The input and output terminals of the short-circuit test device 3 are respectively electrically connected with the short-circuit switch one 8 and the short-circuit switch two 9, which are convenient for turning on or off the short-circuit test device 3.

[0038] Capacitor switch one 4 and capacitor switch two 5, resistance switch one 6 and resistance switch two 7, short circuit switch one 8 and short circuit switch two 9 can adopt intelligent control on-off switch, which can be mechanical or electromagnetic form. Capacitor switch one 4 and capacitor switch two 5, resistance switch one 6 and resistance switch two 7, short circuit switch one 8 and short circuit switch two 9 are connected to the same control line 12, which adopts the form of signal line with the function of on-off control switch, which can be CAN, LIN or other communication lines.

[0039] 250uF / 100Ω pre-charge test:

[0040] Step one: in the capacitor matrix 1, select the capacitor unit 111 to be combined into 250uF in series and parallel, and connect the capacitor connection line 112 to the input and output ends of the capacitor matrix 1;

[0041] Step two: in the resistance matrix 2, select the resistance unit 211 to be combined into 100Ω in series and parallel, and connect the resistance connection line 212 to the input and output ends of the resistance matrix 2;

[0042] Step three: connect the positive and negative poles of the power battery system to the pre-charge test device through bolts or quick connectors, that is, connect the positive pole of the power battery system to the positive connection end 10, and connect the negative pole of the power battery system to the negative connection end 11;

[0043] Step four: close capacitor switch one 4, capacitor switch two 5, resistance switch two 7, and open resistance switch one 6 through control line 12; short circuit switch one 8 and short circuit switch two 9 do not participate and are in the open state;

[0044] Step five: give the power battery system a high-voltage pre-charge instruction to perform normal pre-charge test; observe whether the power battery system can normally perform high-voltage pre-charge execution;

[0045] Step six: after the high-voltage pre-charge test is completed, open capacitor switch one 4 and close resistance switch one 6 through control line 12; at the same time, give the power battery system a low-voltage instruction, and observe whether the power battery system can normally perform low-voltage execution. Then adjust other capacitor values and resistance values to repeat the above test to verify the pre-charge performance of the power battery system.

[0046] Pre-charge short circuit test:

[0047] Step one: after the normal pre-charge test is completed, open capacitor switch one 4, capacitor switch two 5, resistance switch one 6 and resistance switch two 7 through control line 12;

[0048] Step two: according to the pre-charge current value, set the fuse 311 in the short circuit test device 3, and the test uses a 5A fuse 311;

[0049] Step three: connect the positive and negative poles of the power battery system to the pre-charge test device through bolts or quick connectors, that is, connect the positive pole of the power battery system to the positive pole connection end 10, and connect the negative pole of the power battery system to the negative pole connection end 11;

[0050] Step four: close the short circuit switch one 8 and the short circuit switch two 9 through the control line 12;

[0051] Step five: give a high-voltage pre-charge instruction to the power battery system; observe whether the power battery system can identify the pre-charge short circuit; if the power battery system cannot identify the pre-charge short circuit, the fuse 311 is fused to ensure the safety of the test; if other item tests are performed later, only the fuse 311 with the corresponding fuse current value needs to be replaced.

[0052] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, which is made under the utility model concept of the present application, using the content of the present application specification and drawings, is included in the patent protection range of the present application.

Claims

1. A battery pre-charge testing apparatus, characterized by, The application relates to a capacitor-resistor matrix, comprising: a capacitor matrix (1) having an input end, an output end and a plurality of capacitor units (111), at least some of the capacitor units (111) being connected in parallel and / or in series between the input end and the output end of the capacitor matrix (1); a resistor matrix (2) having an input end, an output end and a plurality of resistor units (211), at least some of the resistor units (211) being connected in parallel and / or in series between the input end and the output end of the resistor matrix (2); a positive connection end (10) electrically connecting the input end of the capacitor matrix (1) and the input end of the resistor matrix (2); a negative connection end (11) electrically connecting the output end of the capacitor matrix (1) and the output end of the resistor matrix (2).

2. The battery pre-charge test apparatus of claim 1, wherein At least some of the capacitor units (111) have different capacitance values, and / or at least some of the resistor units (211) have different resistance values.

3. The battery pre-charge test apparatus of claim 2, wherein, Each column of the capacitor units (111) of the capacitor matrix (1) has the same capacitance value, and / or each column of the resistor units (211) of the resistor matrix (2) has the same resistance value.

4. The battery pre-charge test apparatus of claim 3, wherein, The capacitance values of the capacitor units (111) of each row of the capacitor matrix (1) are sequentially increased, and / or the resistance values of the resistor units (211) of each row of the resistor matrix (2) are sequentially increased.

5. The battery pre-charge test apparatus of claim 1, wherein, At least some of the capacitor units (111) of the capacitor matrix (1) have the same capacitance value, and / or at least some of the resistor units (211) of the resistor matrix (2) have the same resistance value.

6. The battery pre-charge test apparatus of claim 1, wherein, The input end and the output end of the capacitor matrix (1) are respectively electrically connected with a capacitor switch one (4) and a capacitor switch two (5).

7. The battery pre-charge test apparatus of claim 1, wherein The input end and the output end of the resistor matrix (2) are respectively electrically connected with a resistor switch one (6) and a resistor switch two (7).

8. The battery pre-charge test apparatus of claim 1, wherein, The application further relates to a short-circuit testing device (3) connected in series between the positive connection end (10) and the negative connection end (11), wherein the short-circuit testing device (3) comprises an internal fuse (311).

9. The battery pre-charge test apparatus of claim 8, wherein, The input end and the output end of the short-circuit testing device (3) are respectively electrically connected with a short-circuit switch one (8) and a short-circuit switch two (9).

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