CN213181889U - Test circuit, PCBA controller and electrical equipment - Google Patents
Test circuit, PCBA controller and electrical equipment Download PDFInfo
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- CN213181889U CN213181889U CN202021573581.5U CN202021573581U CN213181889U CN 213181889 U CN213181889 U CN 213181889U CN 202021573581 U CN202021573581 U CN 202021573581U CN 213181889 U CN213181889 U CN 213181889U
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Abstract
The embodiment of the utility model relates to a test circuit, PCBA controller and electrical equipment, the test circuit is applied to the test of PCBA controller, this PCBA controller includes charging circuit, this test circuit includes charging detection circuit and first power supply circuit; the charging detection circuit comprises a charging detection resistor, the charging detection resistor is electrically connected with the charging circuit, and the charging detection resistor is used as a load when the charging circuit is charged; the first power supply circuit comprises a direct current stabilized power supply which is used for providing a first input voltage and inputting the first input voltage to the charging circuit. In this way, the utility model discloses can reduce the test cost, and stability is higher.
Description
Technical Field
The utility model relates to a detect technical field, especially relate to a test circuit, PCBA controller and electrical equipment.
Background
Daily life has a lot of portable little household electrical appliances to adopt lithium cell power supply, and these household electrical appliances who adopt lithium cell power supply can normally work when battery power is sufficient, if battery power is not enough, need charge in order to guarantee that the product can last normal use.
The functional test is an important ring in the production test, the lithium battery product small household appliance controller needs to provide a power supply meeting the requirement during mass production to verify the function of the PCBA controller, and a battery pack (shown in figure 1) actually used by the whole machine or a plurality of series-connected voltage-stabilized power supplies (shown in figure 2) are usually adopted to detect the charge and discharge functions.
However, if the battery pack is actually used, the battery life is affected because the battery is continuously charged and discharged, and once the battery is under-voltage or the electric quantity is saturated, the BMS circuit in the controller functions, so that the charging and discharging tests cannot be performed, the production test is terminated, and the stability is poor; if a plurality of series-connected regulated power supplies are used, the cost is increased.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a main technical problem who solves provides a power analog circuit, PCBA controller and electrical equipment, can reduce the test cost, and stability is higher.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: in a first aspect, a test circuit is provided for use in testing of a PCBA controller, the PCBA controller including a charging circuit, the test circuit comprising:
a charge detection circuit and a first power supply circuit;
the charging detection circuit comprises a charging detection resistor, the charging detection resistor is electrically connected with the charging circuit, and the charging detection resistor is used as a load when the charging circuit is charged;
the first power supply circuit comprises a direct-current stabilized power supply which is used for providing a first input voltage and inputting the first input voltage to the charging circuit.
In an optional manner, the first power supply circuit further includes at least two voltage dividing resistors.
In an alternative mode, each of the voltage dividing resistors in the at least two voltage dividing resistors has the same resistance value.
In an optional mode, the voltage dividing resistors of the at least two voltage dividing resistors are sequentially connected in series, and both ends of the at least two voltage dividing resistors after being connected in series are respectively connected with the positive electrode of the dc stabilized power supply and the ground.
In an optional manner, the charging circuit includes a power detection circuit, the power detection circuit is electrically connected to the regulated dc power supply, and the power detection circuit is configured to detect a total voltage of the regulated dc power supply.
In a second aspect, there is provided a PCBA controller comprising a charging circuit, the PCBA controller being connected to a test circuit as described above during a test procedure;
the charging circuit comprises a power supply detection circuit and a power supply circuit;
the power supply detection circuit is electrically connected with a direct current stabilized power supply of the test circuit and is used for detecting the total voltage of the direct current stabilized power supply;
the power supply circuit is connected with the charging detection resistor of the test circuit, and the power supply circuit is matched with the charging detection resistor for use and is used for detecting the charging function of the PCBA controller to a load.
In an optional manner, the charging circuit further includes a control circuit, and the control circuit is electrically connected to the power detection circuit;
the control circuit is used for outputting a first control signal to control the power supply detection circuit to detect the total voltage of the direct-current stabilized power supply.
In an optional mode, the control circuit includes a first control output pin, and the power detection circuit includes a first MOS transistor, a second MOS transistor, a first resistor, and a second resistor;
the grid of the first MOS tube is connected with a first control output pin of the control circuit, the source electrode of the first MOS tube is grounded, the drain electrode of the first MOS tube is connected with one end of the first resistor, the other end of the first resistor is connected with the grid of the second MOS tube, the source electrode of the second MOS tube is connected with the positive electrode of the direct-current stabilized power supply, the drain electrode of the second MOS tube is connected with one end of the second resistor, and the other end of the second resistor is connected to the control circuit.
In an optional manner, the charging circuit further includes a voltage conversion circuit, the power circuit is electrically connected to an external charging power source and the voltage conversion circuit, respectively, and an output end of the voltage conversion circuit is connected to the charging detection resistor;
the power supply circuit is used for providing a second input voltage for the voltage conversion circuit according to the external charging power supply.
In an alternative mode, the power circuit is electrically connected with the control circuit;
the control circuit is further used for outputting a second control signal to control the power supply circuit to provide a second input voltage for the voltage conversion circuit.
In a third aspect, there is provided an electrical appliance comprising a housing and a PCBA controller as described above, the PCBA controller being disposed within the housing.
The embodiment of the utility model provides a beneficial effect is: the difference and the condition of prior art, the embodiment of the utility model provides a test circuit, PCBA controller and electrical equipment, PCBA controller includes charging circuit, and test circuit includes charge detection circuit and first power supply circuit, and wherein, charge detection circuit includes charge detection resistance, and first power supply circuit includes direct current constant voltage power supply; when the charging function of the PCBA controller is detected, only one direct-current voltage stabilizing source and at least one resistor are needed, the number of used electrical components is small, the test cost can be reduced, in the detection process of the charging function, the output of the direct-current voltage stabilizing source is stable, adverse effects on the charging circuit or the PCBA controller cannot be caused, and the stability of the detection process is high.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a battery pack used in actual use for charge and discharge detection in the prior art;
FIG. 2 is a schematic diagram of a prior art configuration using multiple series-connected regulated power supplies for charge and discharge detection;
fig. 3 is a block diagram of a test circuit connected to a PCBA controller according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating a connection between a first power circuit and a charging circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of the PCBA controller and the test circuit according to the embodiment of the present invention;
fig. 6 is a block diagram of a charging circuit according to an embodiment of the present invention;
fig. 7 is a block diagram of a charging circuit according to another embodiment of the present invention;
fig. 8 is a circuit schematic diagram of a power detection circuit according to an embodiment of the present invention;
fig. 9 is a circuit schematic diagram of a control circuit provided by an embodiment of the present invention;
fig. 10 is a circuit schematic diagram of a voltage conversion circuit according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
An embodiment of the utility model provides a test circuit, please refer to fig. 3, fig. 3 is the utility model provides a test circuit's block diagram, test circuit 10 are applied to the test of PCBA controller 20, and PCBA controller 20 includes charging circuit 21, and test circuit 10 includes that charging detection circuitry 11 and first power supply circuit 12, and charging detection circuitry 11 includes charging detection resistance R0, and first power supply circuit 12 includes DC voltage-stabilized power supply U1. Specifically, the charging detection resistor R0 is electrically connected to the charging circuit 21, and the charging detection resistor R0 is used as a load when the charging circuit 21 charges the load, wherein one end of the charging detection resistor R0 is connected to the charging circuit 21, and the other end of the charging detection resistor R0 is grounded; the first power circuit 12 includes a regulated dc power supply U1, and a regulated dc power supply U1 is used to provide a first input voltage to the charging circuit 21.
In this embodiment, when the PCBA controller 20 needs to be tested, the test circuit 10 is simply connected directly to the PCBA controller 20, and the test circuit 10 is used to test the charging function of the PCBA controller 20. When the condition that the charging circuit 21 in the PCBA controller 20 charges the load is detected, the charging detection resistor R0 is used as a load end at this time, if the charging circuit 21 is connected with an external charging power supply, the charging circuit 21 and the charging detection resistor R0 can form a loop, and whether the charging function of the charging circuit 21 is normal or not, namely whether the charging function of the PCBA controller 20 is normal or not can be detected by detecting the current of an external charging power supply end.
The test circuit 10 is also capable of providing operating power to the PCBA controller 20, mainly simulating the process of supplying power to the PCBA controller 20 by lithium batteries, wherein the operating voltage provided by the test circuit 10 is determined by the total voltage of the lithium batteries required by the PCBA controller 20 during actual use. After the detection is completed, the test circuit 10 is disconnected from the PCBA controller 20, and the detection of the next PCBA controller 20 is continued.
The dc stabilized power supply U1 can provide a first input voltage for being used as the operating voltage of the charging circuit 21, and because the output voltage of the dc stabilized power supply U1 is relatively stable, adverse effects cannot be brought to the charging circuit 21, the stability of the detection process is relatively high, only one dc stabilized power supply U1 and the charging detection resistor R0 are adopted, used electrical components are few, and the test cost can be reduced.
In some embodiments, as shown in fig. 4, the first power circuit 12 further includes voltage dividing resistors R1, R2, and R3 …, and it is understood that there may be only one voltage dividing resistor, or two or more voltage dividing resistors, and the number of voltage dividing resistors is not limited herein.
Optionally, when the number of the voltage dividing resistors is more than one, the resistance values of all the voltage dividing resistors can be set to be the same, only the resistance value of one voltage dividing resistor needs to be calculated, and the selection of the resistors is convenient. Of course, in other embodiments, voltage dividing resistors with different resistances may be selected and still be used to divide the voltage of the dc regulated power supply U1, and input the divided voltage to the charging circuit 21 to provide the operating voltage for the charging circuit 21.
Optionally, when the number of the voltage dividing resistors is greater than one, all the voltage dividing resistors are sequentially connected in series, that is, the voltage dividing resistors are sequentially connected end to end one by one, one end of a combination of all the voltage dividing resistors connected in series is connected to the positive electrode of the dc stabilized voltage power supply U1, the other end of the combination of all the voltage dividing resistors connected in series is grounded, and if the resistance values of all the voltage dividing resistors are consistent, the voltage dividing on all the voltage dividing resistors are consistent, so that the calculation is simpler and more convenient. Of course, if there is only one voltage dividing resistor, one end of the voltage dividing resistor is connected to the positive electrode of the dc stabilized power supply U1, and the other end of the voltage dividing resistor is grounded; the positive electrode of the dc regulated power supply U1 may be directly connected to the charging circuit 21 without using a voltage dividing resistor.
Illustratively, as shown in fig. 5, the PCBA controller 20 includes a charging circuit 21, and assuming that the charging circuit 21 uses 7 identical lithium batteries as an operating power supply in practical application, the charging circuit 21 has 7 voltage nodes corresponding to 7 lithium batteries, which are respectively referred to as a 1 st node voltage, a 2 nd node voltage, a 3 rd node voltage, a 4 th node voltage, a 5 th node voltage, a sixth node voltage and a 7 th node voltage, 7 resistors with the same resistance value are selected, i.e., a resistor R1R 2R 3R 4R 5R 6R 7, the resistors R1 to R7 are connected in series, and two ends of a combination of the resistor R1 to the resistor R7 connected in series are respectively connected to a dc stabilized power supply U1 and a ground, the dc stabilized power supply U1 has the same voltage division on each resistor, which is the total voltage/7 of the dc stabilized power supply U1, and the charging circuit 21 can provide the same lithium battery power supply voltage, the rated voltage value of each lithium battery is the total voltage/7 of the direct current stabilized power supply U1. Assuming that the rated voltage of each lithium battery is 3.6V, 7 resistors with 10K resistance values may be correspondingly selected from the resistor R1 to the resistor R7, a dc regulated power supply U1 is 25.2V, and is packaged by a patch 2512 and has 0.1% precision, so that the voltage division on each resistor is 25.2/7-3.6V.
It can be understood that the lithium battery itself has the charge-discharge process, so directly adopt the lithium battery can bring some harmful effects to charging circuit 21, for example the voltage is not enough and the working process that leads to charging circuit 21 stops etc., and adopt direct current regulated power supply U1 and divider resistance to realize providing operating voltage in this embodiment, direct current regulated power supply U1's output voltage is comparatively stable, then can not cause harmful effects to charging circuit 21, thereby charging circuit 21's working process is comparatively stable.
The embodiment of the present invention further provides a PCBA controller 20, please refer to fig. 6 in conjunction with fig. 5, the PCBA controller 20 includes a charging circuit 21, and the PCBA controller 20 can be connected to the testing circuits 10 mentioned in all the embodiments above during the testing process; the charging circuit 21 includes a power supply detection circuit 211 and a power supply circuit 212; the power supply detection circuit 211 is electrically connected with a direct current stabilized power supply U1 of the test circuit 10; the power supply circuit 212 is electrically connected to the charge detection resistor R0 of the test circuit 10.
Specifically, the power supply detection circuit 211 is used for detecting the total voltage of the dc regulated power supply U1, and the power supply circuit 212 is used in cooperation with the charge detection resistor R0 for detecting the charging function of the PCBA controller 20 to the load. In the testing process, the charging function of the PCBA controller 20 can be tested only if the total voltage of the dc regulated power supply U1 detected by the power supply detection circuit 211 is smaller than a preset threshold, when the charging function is tested, the power supply circuit 212 needs to be externally connected with an ac power supply and cooperates with the charging detection resistor R0 of the test circuit 10 to form a loop, and if the current in the loop is normal, the charging function of the PCBA controller 20 is normal.
In other embodiments, as shown in fig. 7, the charging circuit 21 further includes a control circuit 213, and the control circuit 213 is electrically connected to the power detection circuit 211; the control circuit 213 is configured to output a first control signal to control the power detection circuit 211 to detect the total voltage of the dc regulated power supply U1.
The control circuit 213 may be a single chip, a micro control unit, or a digital signal processing controller.
In one embodiment, as shown in fig. 8, the control circuit 213 includes a first control output pin EN _ ADP _ PACK _ MEAS and a first receiving pin PACK _ VLT, and the power detection circuit 211 includes a first MOS transistor Q508, a second MOS transistor Q507, a first resistor R519 and a second resistor R516; the grid of the first MOS transistor Q508 is connected with a first control output pin EN _ ADP _ PACK _ MEAS of the control circuit 213, the source of the first MOS transistor Q508 is grounded, the drain of the first MOS transistor Q508 is connected with one end of a first resistor R519, the other end of the first resistor R519 is connected with the grid of a second MOS transistor Q507, the source of the second MOS transistor Q507 is connected with the anode of a direct current stabilized voltage power supply U1, the drain of the second MOS transistor Q507 is connected with one end of a second resistor R516, and the other end of the second resistor R516 is connected with a first receiving pin PACK _ VLT of the control circuit 213.
Specifically, the PACK + port is connected to the positive electrode of dc regulated power supply U1, when the control circuit 213 outputs a first control signal through the first control output pin EN _ ADP _ PACK _ MEAS, assuming that a high-level signal is used as the first control signal, the high-level signal sequentially passes through the resistor R520, the gate and the source of the MOS transistor Q508, and ground to form a loop, so that the MOS transistor Q508 is turned on, and thus the PACK + port, the MOS transistor Q507, the resistor R519, the MOS transistor Q508, and the loop are formed, and the MOS transistor Q507 is also turned on, so that the voltage at the PACK + end, that is, the total voltage at dc regulated power supply U1 is divided by the resistor R516 and the resistor R518, the voltage at the resistor R518 is the voltage at the PACK _ VLT end, and the control circuit 213 can calculate the voltage at the PACK + end in reverse by detecting the voltage at the PACK _ VLT end, thereby determining the total voltage of dc regulated power supply U1. It can be understood that if the control circuit 213 does not output the first control signal, the MOS transistors Q508 and Q507 are both in the off state, and the power detection circuit 211 cannot detect the total voltage of the dc regulated power supply U1.
Further, assuming that the charging circuit 21 charges 7 identical lithium batteries in the actual use process, taking the charge cut-off voltage of a single lithium battery as an example, the charging is only required when the total voltage value of the 7 lithium batteries is lower than 7 × 4.2V — 29.4V, and correspondingly, when the charging circuit 21 is subjected to charge detection, it can be detected whether the charging is performed only when the voltage of the dc regulated power supply U1 detected by the control circuit 213 is lower than 29.4V, and if so, the function is normal.
In other embodiments, referring to fig. 7 again, the charging circuit 21 further includes a voltage converting circuit 214, the power circuit 212 is electrically connected to an external charging power source and the voltage converting circuit 214, respectively, and an output terminal of the voltage converting circuit 214 is connected to the charging detecting resistor R0.
Optionally, the power circuit 212 is electrically connected to the control circuit 213, and the control circuit 213 is further configured to output a second control signal to control the power circuit 212 to provide the second input voltage for the voltage conversion circuit 214.
For example, the control circuit 213 outputs a second control signal to control the MOS transistor and the transistor to be turned on or off, so as to control whether the power circuit 212 provides the second input voltage for the voltage converting circuit 214. Referring to fig. 9 in conjunction with fig. 7, VCC _ ADP is terminated to the external adapter power supply, i.e., the charging power supply input port shown in fig. 6, and EN _ ADP is an output port from which the control circuit 213 outputs the second control signal. When the control circuit 213 outputs the second control signal through the EN _ ADP terminal, the transistor Q706 is turned on, the 3.3V voltage signal of the external power supply passes through the emitter and the collector of the transistor Q706, and then a trigger voltage signal is provided between the source and the gate of the MOS transistor Q705, so that the MOS transistor Q705 is turned on, and the gate of the MOS transistor Q701, the resistor R706, the MOS transistor Q705 and the ground form a loop, so that the gate of the MOS transistor Q701 can be equivalent to the ground, the source of the MOS transistor Q701 is connected to the VCC _ ADP terminal, a voltage difference exists between the gate and the source of the MOS transistor Q701, so that the MOS transistor Q701 can be triggered to be turned on, and thus the voltage of the first node P1 is the voltage of the VCC _ ADP terminal, that is the voltage of the external adapter. It can be understood that, if the control circuit 213 does not output the second control signal, the MOS transistors Q701 and Q705 are both in the off state, and the voltage of the first node P1 is 0V.
Further, the voltage converting circuit 214 receives the voltage of the external adapter power supply from the first node P1, and converts the voltage to output the voltage to the test circuit 10. Taking the switching regulator of LM25011MY as an example to design the voltage conversion circuit 214, please refer to fig. 10 in conjunction with fig. 7, the voltage signal of the first node P1 is filtered by the capacitor C711 and the capacitor C712 and then transmitted to the voltage input terminal VIN of the switching regulator U701, the output terminal SW of the switching regulator U701 outputs the voltage signal after voltage conversion, the voltage signal is filtered by the inductor L701 and then output to the PACK + terminal, and the PACK + terminal is connected to the charge detection resistor R0. If the charging circuit is in a normal condition, the current from the external adapter passes through the power circuit 213, the voltage conversion circuit 214 and the charging detection resistor R0, the whole process forms a loop, the end of the external adapter can detect that the current flows through, otherwise, if the end of the external adapter does not detect the current, the charging circuit 21 is in a failure.
It should be noted that the MOS transistor may also be replaced by an IGBT switching transistor or a triode.
The embodiment of the utility model provides an electrical equipment is still provided, this electrical equipment include the casing with as above PCBA controller 20, PCBA controller 20 sets up in the casing.
The embodiment of the utility model provides a test circuit, PCBA controller and electrical equipment, the test circuit includes charge detection circuit and first power supply circuit, wherein, charge detection circuit includes charge detection resistance, first power supply circuit includes DC stabilized voltage supply; when the charging function of the PCBA controller is detected, only one direct-current voltage stabilizing source and at least one resistor are needed, the number of used electrical components is small, the test cost can be reduced, in the detection process of the charging function, the output of the direct-current voltage stabilizing source is stable, adverse effects on the charging circuit or the PCBA controller cannot be caused, and the stability of the detection process is high.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A test circuit for use in testing of a PCBA controller, the PCBA controller including a charging circuit, the test circuit comprising:
a charge detection circuit and a first power supply circuit;
the charging detection circuit comprises a charging detection resistor, the charging detection resistor is electrically connected with the charging circuit, and the charging detection resistor is used as a load when the charging circuit is charged;
the first power supply circuit comprises a direct-current stabilized power supply which is used for providing a first input voltage and inputting the first input voltage to the charging circuit.
2. The test circuit of claim 1,
the first power supply circuit further includes at least two voltage dividing resistors.
3. The test circuit of claim 2,
the resistance value of each of the at least two voltage division resistors is the same.
4. The test circuit of claim 3,
each of the at least two divider resistors is sequentially connected in series, and two ends of the at least two divider resistors connected in series are respectively connected with the anode of the direct current stabilized voltage power supply and the ground.
5. A PCBA controller including a charging circuit, characterised in that the PCBA controller is connected to the test circuit of any of claims 1-4 during a test;
the charging circuit comprises a power supply detection circuit and a power supply circuit;
the power supply detection circuit is electrically connected with a direct current stabilized power supply of the test circuit and is used for detecting the total voltage of the direct current stabilized power supply;
the power supply circuit is connected with the charging detection resistor of the test circuit, and the power supply circuit is matched with the charging detection resistor for use and is used for detecting the charging function of the PCBA controller to a load.
6. The PCBA controller according to claim 5,
the charging circuit further comprises a control circuit, and the control circuit is electrically connected with the power supply detection circuit;
the control circuit is used for outputting a first control signal to control the power supply detection circuit to detect the total voltage of the direct-current stabilized power supply.
7. The PCBA controller according to claim 6,
the control circuit comprises a first control output pin and a first signal receiving pin, and the power supply detection circuit comprises a first MOS (metal oxide semiconductor) tube, a second MOS tube, a first resistor and a second resistor;
the grid of the first MOS tube is connected with a first control output pin of the control circuit, the source of the first MOS tube is grounded, the drain of the first MOS tube is connected with one end of the first resistor, the other end of the first resistor is connected with the grid of the second MOS tube, the source of the second MOS tube is connected with the anode of the direct-current stabilized voltage power supply, the drain of the second MOS tube is connected with one end of the second resistor, and the other end of the second resistor is connected to a first signal receiving pin of the control circuit.
8. The PCBA controller according to claim 7,
the charging circuit further comprises a voltage conversion circuit, the power supply circuit is respectively electrically connected with an external charging power supply and the voltage conversion circuit, and the output end of the voltage conversion circuit is connected to the charging detection resistor;
the power supply circuit is used for providing a second input voltage for the voltage conversion circuit according to the external charging power supply.
9. The PCBA controller according to claim 8,
the power supply circuit is electrically connected with the control circuit;
the control circuit is further used for outputting a second control signal to control the power supply circuit to provide a second input voltage for the voltage conversion circuit.
10. An electrical appliance comprising a housing and a PCBA controller as claimed in any one of claims 5 to 9, the PCBA controller being disposed within the housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021573581.5U CN213181889U (en) | 2020-07-31 | 2020-07-31 | Test circuit, PCBA controller and electrical equipment |
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| CN202021573581.5U CN213181889U (en) | 2020-07-31 | 2020-07-31 | Test circuit, PCBA controller and electrical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200224A (en) * | 2021-11-04 | 2022-03-18 | 东风柳州汽车有限公司 | Vehicle-mounted device testing system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200224A (en) * | 2021-11-04 | 2022-03-18 | 东风柳州汽车有限公司 | Vehicle-mounted device testing system and method |
| CN114200224B (en) * | 2021-11-04 | 2024-01-19 | 东风柳州汽车有限公司 | Vehicle-mounted device testing system and method |
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