CN108226802B - Battery performance testing method and device - Google Patents
Battery performance testing method and device Download PDFInfo
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- CN108226802B CN108226802B CN201810032293.XA CN201810032293A CN108226802B CN 108226802 B CN108226802 B CN 108226802B CN 201810032293 A CN201810032293 A CN 201810032293A CN 108226802 B CN108226802 B CN 108226802B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
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Abstract
The invention relates to a method and a device for testing battery performance, wherein the method comprises the following steps: the driving tester carries out line conduction test on an external testing device of the battery module and judges whether the line of the external testing device is normally conducted or not; if yes, performing a line short circuit test on the external test device, and judging whether the line of the external test device is short-circuited or not; if yes, an OCV/IR test or a function test is carried out on the battery module through an external test device. According to the embodiment of the invention, the line conduction test and the line short circuit test are carried out on the external test device of the battery module by driving the tester firstly, so that the normal conduction of the line of the external test device is ensured and no short circuit is caused, the safety accidents of empty test, error test or ignition or explosion of the battery module caused by the short circuit of the external test device are avoided when the OCV/IR test or the function test is carried out on the battery module later, and the safety performance of the battery test is improved.
Description
Technical Field
The invention relates to the technical field of battery testing, in particular to a battery performance testing method and device.
Background
After the lithium battery is put into production, an OCV/IR (OCV: open circuit voltage, IR: alternating current internal resistance) test is required to select a product meeting the production condition according to the performance of the battery. And the function of the lithium battery needs to be tested after the lithium battery is assembled so as to distinguish the quality of the assembled product.
When carrying out the OCV IR test to the lithium cell, need contact outside testing arrangement's probe or briquetting and the anodal/negative pole ear of electric core, need contact outside testing arrangement's probe or briquetting and lithium battery protection shield's anodal/negative pole contact when the acting can be tested, however, at the in-process of contact, if outside testing arrangement's internal line appears when opening circuit, empty survey phenomenon can appear, the test is inaccurate, and when the short circuit appears in outside testing arrangement's internal line, the lithium cell that can lead to burns out, the incident takes place, cause the injury to equipment and personnel of production scene.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method and a device for testing battery performance aiming at the defects in the prior art.
The technical means adopted by the invention for solving the technical problem is to provide a battery performance testing method, which comprises the following steps:
the driving tester carries out line conduction test on an external testing device of the battery module and judges whether the line of the external testing device is normally conducted or not;
if yes, performing a line short circuit test on the external test device, and judging whether the line of the external test device is short-circuited or not;
if yes, the external testing device is used for performing OCV/IR testing or function testing on the battery module.
Further, the step of the drive tester performing the line conduction test on the external test device of the battery module comprises:
the tester and the external testing device are connected in a conduction mode by adopting a four-wire system connection design, the tester comprises a first detection common end P +, a first detection point S +, a second detection common end S-and a second detection point P-, the first detection common end P +, the first detection point S +, the external testing device and the tester form a first loop, and the second detection common end S-, the second detection point P-, the external testing device and the tester form a second loop.
Further, the drive tester carries out the circuit conduction test to the external test device of battery module, judges whether the step of external test device's circuit normally switches on includes:
the drive tester inputs a first test signal to the first detection common terminal P + and the second detection common terminal S-;
and detecting whether the first detection point S + and the second detection point P-both output the first test signal, if so, judging that the line of the external test device is normally conducted.
Further, the step of performing a line short circuit test on the external test device and determining whether a short circuit does not occur in the line of the external test device includes:
the drive tester inputs a second detection signal to the first detection common terminal P +, and detects whether the second detection common terminal S-and a second detection point P-output the second detection signal;
if not, the drive tester inputs a second detection signal to the first detection point S +, detects whether a second detection common end S-and a second detection point P-output the second detection signal, and if not, judges that the line of the external test device has no short circuit.
Further, the OCV/IR test or the function test of the battery module by the external test device includes:
performing OCV/IR test on the rechargeable battery in the battery module through the external test device;
and performing function test on the battery protection board in the battery module through the external test device.
In another aspect, the present invention further provides a battery performance testing apparatus, including:
the conduction test unit is used for driving the tester to carry out line conduction test on an external test device of the battery module and judging whether a line of the external test device is normally conducted or not;
the short circuit testing unit is used for carrying out a line short circuit test on the external testing device when the conduction testing unit judges that the conduction testing unit is yes, and judging whether the line of the external testing device is short-circuited or not;
and the battery testing unit is used for carrying out OCV/IR test or function test on the battery module through the external testing device when the short circuit testing unit judges that the short circuit testing unit is yes.
Further, still include:
the wiring design unit is used for conducting and connecting the tester and the external test device by adopting a four-wire system connection design, and comprises a first detection public end P +, a first detection point S +, a second detection public end S-and a second detection point P-, wherein the first detection public end P +, the first detection point S +, the external test device and the tester form a first loop, and the second detection public end S-, the second detection point P-, the external test device and the tester form a second loop.
Further, the conduction test unit includes:
the first conduction signal module is used for driving the tester to input a first test signal to the first detection common end P + and the second detection common end S-;
and the first conduction detection module is used for detecting whether the first detection point S + and the second detection point P-both output the first test signal, and if so, judging that the line of the external test device is normally conducted.
Further, the short circuit test unit includes:
the first short circuit detection module is used for driving a tester to input a second detection signal to the first detection common terminal P +, and detecting whether the second detection common terminal S-and a second detection point P-output the second detection signal;
and the second short circuit detection module is used for driving the tester to input a second detection signal to the first detection point S + when the first short circuit detection module tests and judges that the first detection point S + does not output the second detection signal, and detecting whether the second detection common terminal S-and the second detection point P-output the second detection signal or not, if the second detection common terminal S-and the second detection point P-output the second detection signal, judging that the circuit of the external test device does not have short circuit.
Further, the battery test unit includes:
the OCV/IR testing module is used for driving the external testing device to carry out OCV/IR testing on the rechargeable battery in the battery module;
and the function test module is used for driving the external test device to perform function test on the battery protection board in the battery module.
By adopting the technical scheme, the invention at least has the following beneficial effects: according to the embodiment of the invention, the tester is driven to carry out the line conduction test on the external testing device of the battery module to ensure that the line of the external testing device is normally conducted, so that idle test or error test is avoided when the OCV/IR test or the function test is carried out on the battery module later; the external testing device is subjected to line short circuit testing, so that the situation that short circuit does not occur in the line of the external testing device is ensured, safety accidents such as ignition or explosion of the battery module caused by short circuit of the external testing device when the battery module is subjected to OCV/IR testing or function testing later are avoided, and the safety performance during battery testing is improved.
Drawings
Fig. 1 is a flow chart of an embodiment of a battery performance testing method of the present invention.
Fig. 2 is a flow chart of another embodiment of the battery performance testing method of the present invention.
Fig. 3 is a block diagram illustrating the detailed flow of step S1 according to an embodiment of the method for testing battery performance of the present invention.
Fig. 4 is a block diagram illustrating a detailed flow of step S2 according to an embodiment of the method for testing battery performance of the present invention.
Fig. 5 is a block diagram illustrating the detailed flow of step S3 according to an embodiment of the method for testing battery performance of the present invention.
Fig. 6 is a schematic structural diagram of an embodiment of the battery performance testing apparatus of the present invention.
Fig. 7 is a schematic structural diagram of another embodiment of the battery performance testing apparatus of the present invention.
Fig. 8 is a schematic structural diagram of a battery performance testing apparatus according to still another embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a method for testing battery performance, including:
step S1, driving a tester to perform a line conduction test on an external test device of the battery module, and judging whether a line of the external test device is normally conducted;
step S2, if yes, performing a line short circuit test on the external test device, and judging whether the line of the external test device is short-circuited or not;
and step S3, if yes, performing an OCV/IR test or a function test on the battery module through the external test device.
In the embodiment, the tester is driven to carry out the line conduction test on the external test device of the battery module firstly, so that the normal conduction of the line of the external test device is ensured, and the idle test or the error test is avoided when the OCV/IR test or the function test is carried out on the battery module later; the external testing device is subjected to line short circuit testing, so that the situation that short circuit does not occur in the line of the external testing device is ensured, safety accidents such as ignition or explosion of the battery module caused by short circuit of the external testing device when the battery module is subjected to OCV/IR testing or function testing later are avoided, and the safety performance during battery testing is improved.
In an alternative embodiment, as shown in fig. 2, the step of performing the line conduction test on the external test device of the battery module by the drive tester includes:
and step S4, adopting a four-wire system connection design to connect the tester and the external testing device in a conduction mode, wherein the four-wire system connection design comprises a first detection common end P +, a first detection point S +, a second detection common end S-and a second detection point P-, the first detection common end P +, the first detection point S +, the external testing device and the tester form a first loop, and the second detection common end S-, the second detection point P-, the external testing device and the tester form a second loop.
In specific implementation, a probe or a pressing block for contacting with the battery module extends from the external testing device, wherein the OCV/IR test is performed by contacting the probe with the positive and negative lugs of the battery, the functional test is performed by contacting the probe with the positive and negative lugs of the battery protection board, the first detection common terminal P + and the second detection common terminal S-are connected with one probe of the external testing device, the first detection point S + and the second detection point P-are connected with the other probe of the external testing device, and the tester, the first detection common terminal P +, the first detection point S +, the second detection common terminal S-, the second detection point P-and the external testing device form a plurality of loops, so that the conduction test and the short circuit test can be performed on the external testing device through different loops respectively, the reliability of the internal circuit of the external testing device is ensured, and safety accidents are avoided.
In an alternative embodiment, as shown in fig. 3, the step of performing a line conduction test on an external test device of the battery module by the drive tester, and determining whether a line of the external test device is normally conducted includes:
step S11, driving the tester to input a first test signal to the first detection common terminal P + and the second detection common terminal S-;
step S12, detecting whether the first detection point S + and the second detection point P-both output the first test signal, if so, determining that the line of the external test device is normally conducted.
In implementation, the first detection common port P +, the first detection point S +, the external test device and the tester form a first loop, when the tester inputs a first test signal through the first detection common port P + or the second detection common port S-, if an internal circuit of the external test device is normally turned on, the tester may detect the first test signal at the first detection point S + or the second detection point P-, and if the internal circuit of the external test device is shorted, the tester may not detect the first test signal at the first detection point S + or the second detection point P-.
Specifically, first relay KA1 and second relay KA2 can be increased in external testing arrangement 'S internal circuit line, first relay KA1 is equipped with normally open contact K1, normally open contact K1' S one end with first detection common port P + turn-on connection, normally open contact K1 'S the other end pass through external testing arrangement behind the internal circuit with first check point S + turn-on connection, when carrying out the conduction test, the tester provides voltage to first relay KA 1' S relay coil and makes normally open contact K1 closed, first test signal can get into normally open contact K1 'S one end through probe or briquetting first detection common port P +, through the normally open contact K1 actuation of first relay KA1 after switching on from external testing arrangement' S internal circuit and first check point S + outflow, thereby get into P L C or the IO card and be detected and observed.
Similarly, the second relay KA2 is provided with a normally open contact K2, one end of the normally open contact K2 is connected to the second detection common terminal S-in, the other end of the normally open contact K2 is connected to the second detection point P-in after passing through the internal circuit of the external test device, when conducting the conduction test, a first test signal enters one end of the normally open contact K2 through the probe or the remote-controlled second detection common terminal S-, a relay coil of the second relay KA2 is provided with voltage through the tester so that the normally open contact K2 is attracted and conducted, and flows out from the internal circuit of the external test device and the second detection point P-and enters the P L C or the IO card to be detected, wherein the P L C or the IO card may be a functional module in the tester, or may be individually connected to the first detection point S + and the second detection point P-, a module for detecting the first test signal, and when the first detection common terminal P + or the second detection common terminal S-is input to the first detection point S + and the second detection point P-L, the external test device may determine that the first test signal is normally input.
In an alternative embodiment, as shown in fig. 4, the step of performing a line short test on the external test device and determining whether a short circuit does not occur in the line of the external test device includes:
step S21, driving the tester to input a second detection signal to the first detection common terminal P +, and detecting whether the second detection common terminal S-and a second detection point P-output the second detection signal;
and step S22, if not, the drive tester inputs a second detection signal to the first detection point S +, detects whether a second detection common terminal S-and a second detection point P-output the second detection signal, and if not, judges that the line of the external test device has no short circuit.
In implementation, a third relay KA3 and a fourth relay KA4 are added in an internal circuit line of an external testing device, the third relay KA3 is provided with normally open contacts K3, K4 and K5, one end of the normally open contact K3 is in conduction connection with the first detection common end P +, the other end of the normally open contact K3 is connected with an internal circuit of the external testing device, one end of the normally open contact K4 is in conduction connection with the second detection point P-, the other end of the normally open contact K4 is used as a detection point, one end of the normally open contact K5 is in conduction connection with the second detection common end S-, the other end of the normally open contact K5 is used as a detection point, specifically, the other ends of the normally open contact K4 and the normally open contact K5 which are used as detection points are connected with a tester, and can also be connected to an input end of a P L C or an IO card, and whether a second detection common end S-and the second detection point P-have a second test signal output through the tester, the P L C or the IO card.
The driving tester provides voltage for a coil of the third relay KA3, so that the normally open contact K3, the normally open contact K4 and the normally open contact K5 are closed and conducted, a first detection common end P +, a first detection point S +, an external test device and the tester form a first loop, a second detection common end S-, a second detection point P-, the external test device and the tester form a second loop, when the tester inputs a second detection signal to the first detection common end P +, if any one of the second detection common end S-and the second detection point P-has a signal output to the tester or the P L C or the IO card, the internal circuit of the external test device is judged to have a short circuit condition, and subsequent tests on the resistor module are forbidden.
Similarly, the fourth relay KA4 is provided with a normally open contact K6, a normally open contact K7 and a normally open contact K8, one end of the fast search normally open contact K6 is in conduction connection with the first detection point S +, the other end of the normally open contact K6 is connected with an internal circuit of the external test device, one end of the normally open contact K7 is in conduction connection with the second detection point P-, the other end of the normally open contact K7 is used as a detection point, one end of the normally open contact K8 is in conduction connection with the second detection common end S-, and the other end of the normally open contact K8 is used as a detection point, specifically, the other ends of the normally open contact K7 and the normally open contact K8 which are used as detection points are connected with a tester and can also be connected to an input end of a P L C or IO card, and whether a second test signal is output from the second detection common end S-and the second detection point P-is detected by the tester, P L C or IO card.
The driving tester provides voltage for a coil of the fourth relay KA4, so that the normally open contact K6, the normally open contact K7 and the normally open contact K8 are closed and conducted, a first detection common end P +, a first detection point S +, an external testing device and the tester form a first loop, a second detection common end S-, a second detection point P-, the external testing device and the tester form a second loop, when the tester inputs a second detection signal to the first detection point S +, if any one of the second detection common end S-and the second detection point P-has a signal output to the tester or the P L C or the IO card, the internal circuit of the external testing device is judged to be in a short circuit condition, and subsequent testing of the resistor module is forbidden.
In one embodiment, as shown in fig. 5, the OCV/IR test or the functional test of the battery module by the external test device includes:
step S31, the OCV/IR test is carried out on the rechargeable battery in the battery module through the external testing device;
and step S32, performing a function test on the battery protection board in the battery module through the external test device.
When implementing, the battery module includes rechargeable battery and battery protection shield, and the circuit that accomplishes outside testing arrangement switches on test and circuit short circuit test, confirms that outside testing arrangement's internal line switches on and does not have the short circuit after, it is right through outside testing arrangement rechargeable battery carries out OCV IR test, and right through outside testing arrangement the battery protection shield carries out functional test, can effectively avoid taking place misdetection, empty survey or arouse the battery incident, improves and generates the security.
On the other hand, as shown in fig. 6 to 8, the present invention also provides a battery performance testing apparatus, comprising:
the conduction testing unit 1 is used for driving a tester to perform line conduction testing on an external testing device of the battery module, and judging whether a line of the external testing device is normally conducted or not;
the short circuit testing unit 2 is used for carrying out a line short circuit test on the external testing device when the conduction testing unit judges that the conduction testing unit is yes, and judging whether a line of the external testing device is short-circuited or not;
and the battery test unit 3 is used for carrying out OCV/IR test or function test on the battery module through the external test device when the short circuit test unit judges that the short circuit test unit is yes.
In the embodiment, the conduction test unit 1 drives the tester to perform line conduction test on the external test device of the battery module, so that the line of the external test device is ensured to be normally conducted, and idle test or mistest is avoided when the OCV/IR test or the function test is performed on the battery module later; and then the short circuit testing unit 2 performs a line short circuit test on the external testing device to ensure that the line of the external testing device is not short-circuited, so that safety accidents such as ignition or explosion of the battery module caused by short circuit of the external testing device when the battery module is subjected to an OCV/IR test or a function test later are avoided, and when the external testing device is determined to be normally conducted and not short-circuited, the safety performance during the battery test is improved when the battery module is subjected to the OCV/IR test or the function test through the battery testing unit 3.
In an alternative embodiment, the battery performance testing apparatus of the present invention further comprises:
the wiring design unit 4 is used for conducting and connecting the tester and the external test device by adopting a four-wire system connection design, and comprises a first detection common end P +, a first detection point S +, a second detection common end S-and a second detection point P-, wherein the first detection common end P +, the first detection point S +, the external test device and the tester form a first loop, and the second detection common end S-, the second detection point P-, the external test device and the tester form a second loop.
In specific implementation, a probe or a pressing block for contacting and conducting connection with the battery module extends out of the external testing device, wherein the OCV/IR test is a contact test through the contact of the probe with the positive and negative lugs of the battery, the functional test is a contact test through the contact of the probe with the positive and negative lugs of the battery protection board, the first detection common end P + and the second detection common end S-are connected with one probe of the external testing device, the first detection point S + and the second detection point P-are connected with the other probe of the external testing device, and the tester, the first detection common end P +, the first detection point S +, the second detection common end S-, the second detection point P-and the external testing device form a plurality of loops, so that the external testing device can be conducted and tested for short circuit through different loops respectively, the internal circuit of the external testing device is normally conducted and is not short-circuited before the battery module is tested, and safety accidents are avoided.
In an alternative embodiment, the conduction test unit 1 includes:
the first conduction signal module 11 is configured to drive the tester to input a first test signal to the first detection common terminal P + and the second detection common terminal S-;
the first conduction detection module 12 is configured to detect whether the first detection point S + and the second detection point P-both output the first test signal, and if so, determine that the line of the external test device is normally conducted.
In implementation, because the first detection common port P +, the first detection point S +, the external test device and the tester form a first loop, and the second detection common port S-, the second detection point P-, the external test device and the tester form a second loop, when the first conduction signal module 11 drives the tester to input a first test signal to the first detection common port P +, the first conduction detection module 12 can detect the first test signal at the first detection point S +, or when the first conduction signal module 11 drives the tester to input a first test signal to the second detection common port S-, the first conduction detection module 12 determines that the line of the external test device is normally conducted when the first conduction signal module 12 can detect the first test signal at the second detection point P-.
In an alternative embodiment, the short circuit test unit 2 comprises:
the first short circuit detection module 21 is configured to drive the tester to input a second detection signal to the first detection common terminal P +, and detect whether the second detection common terminal S-and the second detection point P-output the second detection signal;
and the second short circuit detection module 22 is configured to, when the first short circuit detection module tests and determines that the first detection point S + is not the first detection point, drive the tester to input a second detection signal to the first detection point S +, detect whether the second detection common terminal S-and the second detection point P-output the second detection signal, and if the second detection common terminal S-and the second detection point P-do not output the second detection signal, determine that the line of the external test apparatus is not short-circuited.
In implementation, since the first detection common terminal P +, the first detection point S +, the external test device and the tester form a first loop, and the second detection common terminal S-, the second detection point P-, the external test device and the tester form a second loop, when the first short-circuit detection module 21 drives the tester to input a second test signal to the first detection common terminal P +, the second short-circuit detection module 22 determines a line short circuit of the external test device when the second detection common terminal S-or the second detection point P-can detect the second test signal, and when the first short-circuit detection module 21 drives the tester to input a second test signal to the first detection point S +, the second short-circuit detection module 22 determines that the line of the external test device is normally conducted when the second detection common terminal S-or the second detection point P-can detect the first test signal, specifically, the second detection common terminal S-and the second detection point P-and P L C or the detection point P-and the external test device are normally conducted if the line of the second detection common terminal S-and the second detection point P L are connected to the external test card.
In an alternative embodiment, the battery test unit 3 comprises:
the OCV/IR testing module 31 is configured to drive the external testing device to perform an OCV/IR test on the rechargeable battery in the battery module;
and the function test module 32 is used for driving the external test device to perform function test on the battery protection board in the battery module.
When implementing, the battery module includes rechargeable battery and battery protection board, and the circuit that accomplishes outside testing arrangement switches on test and circuit short circuit test, confirms that outside testing arrangement's internal line switches on and does not have the short circuit after, and it is right to drive outside testing arrangement through OCV IR test module 31 rechargeable battery carries out OCV IR test to it is right to drive outside testing arrangement through functional test module 32 the battery protection board carries out functional test, thereby ensures that outside testing arrangement's circuit switches on and does not have the short circuit phenomenon, can effectively avoid taking place misdetection, empty survey or arouse the battery incident, improves and generates the security.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A battery performance testing method is characterized by comprising the following steps:
the driving tester carries out line conduction test on an external testing device of the battery module and judges whether the line of the external testing device is normally conducted or not;
if yes, performing a line short circuit test on the external test device, and judging whether the line of the external test device is short-circuited or not;
if so, performing OCV/IR test or function test on the battery module through the external test device;
the step of the drive tester carrying out line conduction test on the external test device of the battery module comprises the following steps:
the tester and the external testing device are connected in a conduction mode by adopting a four-wire system connection design, the tester comprises a first detection common end P +, a first detection point S +, a second detection common end S-and a second detection point P-, the first detection common end P +, the first detection point S +, the external testing device and the tester form a first loop, and the second detection common end S-, the second detection point P-, the external testing device and the tester form a second loop.
2. The battery performance testing method according to claim 1, wherein the driving tester performs a line conduction test on an external testing device of the battery module, and the step of determining whether a line of the external testing device is normally conducted includes:
the drive tester inputs a first test signal to the first detection common terminal P + and the second detection common terminal S-;
and detecting whether the first detection point S + and the second detection point P-both output the first test signal, if so, judging that the line of the external test device is normally conducted.
3. The battery performance testing method according to claim 1 or 2, wherein the step of performing a line short circuit test on the external testing device and determining whether a short circuit does not occur in a line of the external testing device comprises:
the drive tester inputs a second test signal to the first detection common terminal P +, and detects whether the second detection common terminal S-and a second detection point P-output the second test signal;
if not, the driving tester inputs a second test signal to the first detection point S +, detects whether a second detection common end S-and a second detection point P-output the second test signal, and if not, judges that the line of the external test device has no short circuit.
4. The battery performance testing method according to claim 1, wherein the OCV/IR testing or the function testing of the battery module by the external testing device includes:
performing OCV/IR test on the rechargeable battery in the battery module through the external test device;
and performing function test on the battery protection board in the battery module through the external test device.
5. A battery performance testing apparatus, comprising:
the conduction test unit is used for driving the tester to carry out line conduction test on an external test device of the battery module and judging whether a line of the external test device is normally conducted or not;
the short circuit testing unit is used for carrying out a line short circuit test on the external testing device when the conduction testing unit judges that the conduction testing unit is yes, and judging whether the line of the external testing device is short-circuited or not;
the battery testing unit is used for performing OCV/IR test or function test on the battery module through the external testing device when the short circuit testing unit judges that the short circuit testing unit is positive;
the wiring design unit is used for conducting and connecting the tester and the external test device by adopting a four-wire system connection design, and comprises a first detection public end P +, a first detection point S +, a second detection public end S-and a second detection point P-, wherein the first detection public end P +, the first detection point S +, the external test device and the tester form a first loop, and the second detection public end S-, the second detection point P-, the external test device and the tester form a second loop.
6. The battery performance testing apparatus of claim 5, wherein the conduction testing unit comprises:
the first conduction signal module is used for driving the tester to input a first test signal to the first detection common end P + and the second detection common end S-;
and the first conduction detection module is used for detecting whether the first detection point S + and the second detection point P-both output the first test signal, and if so, judging that the line of the external test device is normally conducted.
7. The battery performance test apparatus of claim 5 or 6, wherein the short circuit test unit comprises:
the first short circuit detection module is used for driving a tester to input a second test signal to the first detection common terminal P +, and detecting whether the second detection common terminal S-and a second detection point P-output the second test signal or not;
and the second short circuit detection module is used for driving the tester to input a second test signal to the first detection point S + when the first short circuit detection module tests and judges that the first detection point S + does not output the second test signal, and detecting whether the second detection common terminal S-and the second detection point P-output the second test signal, if the second detection common terminal S-and the second detection point P-output the second test signal, judging that the circuit of the external test device does not have short circuit.
8. The battery performance testing apparatus of claim 5, wherein the battery testing unit comprises:
the OCV/IR testing module is used for driving the external testing device to carry out OCV/IR testing on the rechargeable battery in the battery module;
and the function test module is used for driving the external test device to perform function test on the battery protection board in the battery module.
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| CN109444645B (en) * | 2018-12-21 | 2024-03-08 | 珠海华冠科技股份有限公司 | Battery cell short circuit testing device and testing method thereof |
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