CN113752907B - Fault detection method for heating loop of battery system - Google Patents
Fault detection method for heating loop of battery system Download PDFInfo
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- CN113752907B CN113752907B CN202010485909.6A CN202010485909A CN113752907B CN 113752907 B CN113752907 B CN 113752907B CN 202010485909 A CN202010485909 A CN 202010485909A CN 113752907 B CN113752907 B CN 113752907B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The application relates to a fault detection method of a heating loop of a battery system, and belongs to the technical field of heating equipment. The method comprises the following steps: when the heating film does not work, the first switch and the second switch are controlled to be closed; acquiring a voltage U1 of a first resistor and a voltage U2 of a second resistor; if U1 and U2 are 0, judging that the heating film is disconnected; otherwise, judging that the heating film is not broken; one end of the first switch and one end of the first resistor are connected with the negative electrode of the battery pack, and the other end of the first switch and one end of the first resistor, which is connected with the heating positive electrode contactor and the heating film, are connected; one end of the second switch and one end of the second resistor are connected with the anode of the battery pack, and the other end of the second switch and one end of the second resistor, which is connected with the heating film, are connected with the heating cathode contactor. According to the application, the detection of whether the heating film is broken or not can be completed under the condition that the heating contactor is not closed by acquiring the voltages of the first resistor and the second resistor, so that the phenomenon that the heating contactor is drawn to arc due to the broken heating film after the heating contactor is closed is avoided. The whole judging method is simple, timely and reliable.
Description
Technical Field
The application relates to a fault detection method of a heating loop of a battery system, and belongs to the technical field of heating equipment.
Background
Along with the increasing scarcity of petroleum resources and the increasing awareness of environmental protection of people, the new energy automobile is more and more important in the automobile field. And the pure electric vehicle is taken as a main force army in the new energy vehicle, and is necessarily more valued.
The battery system is used as a core component of the new energy automobile, and the performance of the battery system directly influences the overall performance of the new energy automobile. Because the battery has lower electric quantity and poorer performance at low temperature, in order to ensure good performance of the battery at low temperature, a heating system is generally arranged in a battery system, and the temperature of the battery is increased in a heating mode by a heating film, so that the maximization of the performance of the battery system is ensured.
In heatable battery system, the heating film is generally supplied power by the electric core, and the heating film passes through heating relay with the electric core and is connected and form the return circuit to the heating film is hugged closely with the electric core in the battery package inside, and when the heating film appears unusual, for example: when the heating film and the battery core are in short circuit, the heating film is broken circuit and other faults, if the heating is started, the problems of arc discharge, battery core breakdown and the like are very easy to occur, and even the safety problems of battery pack ignition and the like are caused. It is therefore necessary to diagnose the battery heating failure.
At present, the method for diagnosing the break faults of the heating film is to start a heating mode, and judge whether the heating film breaks or not through the temperature rise of the battery pack. However, the method is to diagnose the fault after the heating is started, and the fault of the open circuit of the heating film can be diagnosed generally by at least a few minutes, so that the detection is not timely, the problem that the heating relay is closed to generate arc discharge after the heating film is opened cannot be avoided, and the method cannot comprehensively detect the fault of the heating circuit.
Disclosure of Invention
The application aims to provide a fault detection method of a heating loop of a battery system, which is used for solving the problem that in the prior art, heating films are drawn after a heating relay is closed in time when fault detection is not carried out.
In order to achieve the above object, the present application provides a technical solution of a fault detection method for a heating circuit of a battery system, including the following steps:
1) When the heating film does not work, the first switch and the second switch are controlled to be closed;
2) When the first switch and the second switch are both closed, acquiring the voltage U1 of the first resistor and the voltage U2 of the second resistor;
3) If U1 and U2 are 0, judging that the heating film is disconnected; otherwise, judging that the heating film is not broken;
one end of the series circuit of the first switch and the first resistor is connected with the negative electrode of the battery pack, and the other end of the series circuit of the first switch and the first resistor is connected with one end of the heating positive electrode contactor connected with the heating film; and one end of the series circuit of the second switch and the second resistor is connected with the anode of the battery pack, and the other end of the series circuit of the second switch and the second resistor is connected with one end of the heating cathode contactor connected with the heating film.
The technical scheme of the fault detection method of the battery system heating loop has the advantages that: when the heating film does not work, namely the heating contactor is not closed, under the condition that the heating contactor is not closed, the first switch and the second switch are closed, if the heating film is opened, the heating film, the first resistor, the second resistor and the battery pack cannot form a loop, the voltage of the first resistor and the second resistor is 0, if the heating film is not opened, the heating film, the first resistor, the second resistor and the battery pack form a loop, and at the moment, the first resistor and the second resistor have partial voltages, namely the voltage of the first resistor and the second resistor is not 0, therefore, the application can finish the detection of whether the heating film is opened or not under the condition that the heating contactor is not closed by acquiring the voltage of the first resistor and the second resistor, and avoids the phenomenon of arc discharge caused by the opening of the heating film at the moment when the heating contactor is closed. The whole judging method is simple, timely and reliable.
Further, in order to comprehensively detect the heating loop fault, the method further comprises the step of judging whether the heating film and the battery cell are in short circuit or not:
1) When the heating film does not work, the first switch is controlled to be closed, and the second switch is controlled to be opened; acquiring the voltage U1 of the first resistor;
2) If U1 is not 0, judging that the heating film is in short circuit with the electric core; if U1 is 0, entering step 3);
3) Controlling the second switch to be closed, and opening the first switch; acquiring the voltage U2 of the second resistor;
4) If U2 is not 0, judging that the heating film is in short circuit with the electric core; and if U2 is 0, judging that the heating film and the battery cell are not in short circuit.
Further, in order to comprehensively detect the heating loop fault, the method further comprises the step of judging whether the heating film and the battery cell are in short circuit or not:
1) When the heating film does not work, the second switch is controlled to be closed, and the first switch is opened; acquiring the voltage U2 of the second resistor;
2) If U2 is not 0, judging that the heating film is in short circuit with the electric core; if U2 is 0, entering step 3);
3) The first switch is controlled to be closed, and the second switch is controlled to be opened; acquiring the voltage U1 of the first resistor;
4) If U1 is not 0, judging that the heating film is in short circuit with the electric core; if U1 is 0, judging that the heating film and the battery cell are not in short circuit.
Further, in order to ensure the accuracy of the heating film break detection result, the judging result of judging the heating film break in the step 3) is a preliminary judging result, if the first switch and the second switch are closed, the voltage U1 of the first resistor and the voltage U2 of the second resistor are periodically obtained, and the continuous preliminary judging results in the first set time are the heating film break, then the heating film break is finally determined.
Further, in order to ensure the accuracy of the detection result of the short circuit between the heating film and the electric core, the judgment result of judging the short circuit between the heating film and the electric core in the step 2) is a preliminary judgment result, if the first switch is closed, the voltage U1 of the first resistor is periodically obtained after the second switch is opened, and the continuous preliminary judgment results in the second setting time are the short circuit between the heating film and the electric core, so that the short circuit between the heating film and the electric core is finally determined.
Further, in order to ensure the accuracy of the detection result of the short circuit between the heating film and the electrical core, the judgment result of judging the short circuit between the heating film and the electrical core in the step 4) is a preliminary judgment result, if the second switch is closed, after the first switch is opened, the voltage U2 of the first resistor is periodically obtained, and the continuous preliminary judgment results in the second setting time are the short circuit between the heating film and the electrical core, so that the short circuit between the heating film and the electrical core is finally determined.
Drawings
FIG. 1 is a schematic circuit diagram of a heating circuit of a battery system of the present application;
FIG. 2 is a flow chart of fault detection for a heating film break in a heating circuit of a battery system according to the present application;
fig. 3 is a flow chart of fault detection for a short circuit between a heating film and a battery cell in a heating circuit of a battery system according to the present application.
Detailed Description
Fault detection method for battery system heating circuit example 1:
the battery system heating circuit, as shown in fig. 1, includes a battery pack, a heating film R3, a heating positive electrode contactor KM3, a heating negative electrode contactor KM4, a high voltage switch KM2 (second switch), a resistor R2 (second resistor), a high voltage switch KM1 (first switch), a resistor R1 (first resistor), a voltage detection device, and a control device (not shown in the figure).
One end of the heating film R3 is connected with the positive electrode of the battery pack through a heating positive electrode contactor KM 3; the other end of the heating film R3 is connected with the negative electrode of the battery pack through a heating negative electrode contactor KM 4; the high-voltage switch KM2 is connected with the resistor R2 in series, one end of a series circuit of the high-voltage switch is connected with the positive electrode of the battery pack, and the other end of the series circuit is connected with one end of the heating positive electrode contactor KM3 connected with the heating film R3; the high-voltage switch KM1 is connected with the resistor R1 in series, one end of a series circuit of the high-voltage switch is connected with the negative electrode of the battery pack, and the other end of the series circuit is connected with one end of the heating negative electrode contactor KM4 connected with the heating film R3.
The voltage detection device is used for detecting the voltage U1 at two ends of the resistor R1 and the voltage U2 at two ends of the resistor R2, wherein the voltage U1 at two ends of the resistor R1 is the voltage between the battery pack negative electrode and the first end of the heating positive electrode contactor KM3 (the first end of the heating positive electrode contactor KM3 is the end connected with the heating film R3, the second end is the end connected with the battery pack positive electrode of the heating positive electrode contactor KM 3), and the voltage U2 at two ends of the resistor R2 is the voltage between the battery pack positive electrode and the first end of the heating negative electrode contactor KM4 (the first end of the heating negative electrode contactor KM4 is the end connected with the heating film R3, and the second end is the end connected with the battery pack negative electrode of the heating negative electrode contactor KM 4).
The control device is controlled to be connected with the high-voltage switch KM2 and the high-voltage switch KM1 and used for controlling the opening and closing of the high-voltage switch KM2 and the high-voltage switch KM 1; the control device is connected with the voltage detection device and is used for receiving the voltage detected by the voltage detection device, the control device comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, the processor realizes a fault detection method when executing the computer program, and the fault detection of the heating loop of the battery system is completed through the judgment logic of the fault detection method.
In this embodiment, the resistances of the resistor R2 and the resistor R1 are high, and are M Ω, and the resistances of the resistor R2 and the resistor R1 are the same, and the resistance of the heating film R3 is low, and is Ω, so that the partial pressure of the heating film R3 is negligible if the battery pack, the resistor R2, the resistor R1, and the heating film R3 form a series circuit.
The judgment logic of the fault detection method is as shown in fig. 2, and comprises the following steps:
1) When the heating film R3 does not work (when the heating film R3 does not work, namely the heating positive electrode contactor KM3 and the heating negative electrode contactor KM4 are opened, and the battery pack does not supply power to the heating film R3), the control device controls the high-voltage switch KM2 and the high-voltage switch KM1 to be closed;
2) The high-voltage switch KM2 and the high-voltage switch KM1 are closed, timing detection is started, the detection time is 5s, and the voltage detection device continuously collects the voltage U2 of the resistor R2 and the voltage U1 of the resistor R1 with a period of 100ms after the high-voltage switch KM2 and the high-voltage switch KM1 are closed for 500ms and sends the collected voltages to the control device (the purpose of time delay detection is to ensure the stability of the collected voltages);
3) The control device reads U1 and U2, carries out logic judgment, and judges whether the heating film R3 is broken or not:
if it is detected that both of |U1| and |U2| are smaller than 25V, the preliminary judgment result is that the heating film R3 is broken; continuously reading U1 and U2, if the continuous preliminary judgment results are that the heating film R3 is broken in 2s, finally determining that the heating film R3 is broken, and reporting the breaking fault of the heating film;
if the initial judgment results that the heating film R3 is not broken in 2s are the continuous initial judgment results of the I U1 and the I U2, the heating film R3 is judged to be not broken, and after the detection time is 5s, the heating film is reported to be in a fault state of not breaking.
As can be seen from fig. 1, if the heating film is disconnected, the heating film R3, the resistor R1, the resistor R2, and the battery pack cannot form a loop, and theoretically, when the voltages of the resistor R1 and the resistor R2 are 0, that is, when the voltages of the resistor R1 and the resistor R2 are 0, the heating film R3 is disconnected, but when the voltages are 0 in actual engineering, a certain voltage value is detected, so that the relevant threshold value is set to indicate that the voltage is 0, and the set threshold value is 25V (the threshold value can be set according to the requirement, the application is not limited), that is, |u1| and |u2| are smaller than 25V, which represents that the voltage is 0;
otherwise, |u1| and |u2| are both equal to or greater than 25V, then the battery pack, the resistor R2, the resistor R1 and the heating film R3 form a series circuit, and the resistor R2 and the resistor R1 are divided by each other, in this embodiment, |u1|= |u2|=0.5|u N |，|U N And I is the battery pack terminal voltage.
4) And the detection time is ended for 5s, and the open circuit fault detection is ended.
In the above embodiment, in order to avoid the misjudgment of the disconnection detection result, the disconnection detection condition is periodically judged within 2s, and the disconnection of the heating film R3 is continuously judged, and then the disconnection of the final heating film R3 is confirmed, and in other embodiments, the disconnection detection is only performed once under the condition that the accurate disconnection detection result is ensured. Meanwhile, the first setting time is set to 2s in this example, and as another embodiment, the first setting time may be set as needed.
In the above embodiment, in order to ensure the stability of the acquired voltage, the delay acquisition time is set, and as other embodiments, the delay time may not be set or may be shortened under the condition of ensuring the stability of the voltage.
According to the application, when the heating film R3 is not started, namely before the heating positive electrode contactor KM3 and the heating negative electrode contactor KM4 are closed, open-circuit fault detection is carried out on the heating film R3, so that the phenomenon that the heating film R3 is drawn by open-circuit after the heating positive electrode contactor KM3 and the heating negative electrode contactor KM4 are closed is avoided.
Fault detection method for battery system heating circuit example 2:
the battery system heating circuit of the present embodiment is the same as the battery system heating circuit of embodiment 1 in terms of the composition and connection relationship of the hardware structure, and is different in the fault detection process, and the fault detection method of the present embodiment increases the fault detection of whether the electrical core and the heating film R3 are shorted based on embodiment 1, and the detection process also detects when the heating film R3 is not started to operate, so as to avoid the phenomenon of electrical core breakdown caused by the electrical core and the heating film R3 shorted after the heating contactor is closed.
Specifically, the fault detection method for short circuit between the battery cell and the heating film R3 is shown in FIG. 3, and comprises the following steps:
1) When the heating film R3 is not started to work, the control device controls the high-voltage switch KM1 to be closed and controls the high-voltage switch KM2 to be opened;
2) The voltage detection device starts timing detection of the second set time 2s after the high-voltage switch KM1 is closed and the high-voltage switch KM2 is opened for 500ms (the purpose of the delay detection is to ensure the stability of the collected voltage); continuously collecting the voltage U1 of the resistor R1 with the period of 100ms, and sending the collected voltage to a control device;
3) The control device reads U1, carries out logic judgment and judges whether the battery cell is in short circuit with the heating film R3 or not:
if the I U1I is more than or equal to 25V, the initial judgment result is that the battery cell is in short circuit with the heating film R3, the U1 is continuously read, and in 2s (namely in the second set time), the continuous initial results are that the battery cell is in short circuit with the heating film R3, and the short circuit of the battery cell and the heating film R3 is finally determined; reporting short circuit faults of the battery cell and the heating film R3; the heating film R3 is not allowed to turn on heating; subsequent detection is not required;
if the detection of the I U1I is less than 25V, stopping 2s timing detection and entering step 4);
4) The control device controls the high-voltage switch KM1 to be opened and the high-voltage switch KM2 to be closed;
5) The voltage detection device starts timing detection of a second set time 2s after the high-voltage switch KM1 is opened and the high-voltage switch KM2 is closed for 500 ms; continuously collecting the voltage U2 of the resistor R2 with the period of 100ms, and sending the collected voltage to a control device;
6) The control device reads U2, carries out logic judgment and judges whether the battery cell is in short circuit with the heating film R3 or not:
if the I U2I is not less than 25V, the initial judgment result is that the battery cell is in short circuit with the heating film R3, the U2 is continuously read, and in 2s, the continuous initial judgment results are that the battery cell is in short circuit with the heating film R3, and the battery cell is finally determined to be in short circuit with the heating film R3; reporting a short circuit fault; the heating film R3 is not allowed to turn on heating;
if the detection value of the I U2I is less than 25V, stopping 2s timing detection, judging that the battery cell and the heating film R3 are not in short circuit, and reporting that the heating film R3 and the battery cell are not in short circuit fault.
7) After the detection is finished, the detection is stopped.
In the above embodiment, the short circuit fault detection process is to close the high voltage switch KM1 first, and close the high voltage switch KM2 after the high voltage switch KM1 is opened, and as other embodiments, the high voltage switch KM2 may be closed first, and close the high voltage switch KM1 after the high voltage switch KM2 is opened, and the other specific detection method processes are the same as those in the above embodiment, and will not be described herein.
In the above embodiment, in order to avoid false detection of the short circuit between the battery cell and the heating film R3, the short circuit between the battery cell and the heating film R3 can be determined by continuously detecting the short circuit between the battery cell and the heating film R3 within 2 s.
According to the application, fault detection of the open circuit of the heating film R3 and short circuit of the battery cell and the heating film R3 is completed before the heating film R3 works, and the fault detection is more comprehensive.
Claims (4)
1. The fault detection method for the heating loop of the battery system is characterized by comprising a method for judging whether a heating film is broken or not and a method for judging whether the heating film and an electric core are in short circuit or not, wherein the method for judging whether the heating film is broken or not comprises the following steps of:
1) When the heating film does not work, the first switch and the second switch are controlled to be closed;
2) When the first switch and the second switch are both closed, acquiring the voltage U1 of the first resistor and the voltage U2 of the second resistor;
3) If U1 and U2 are 0, judging that the heating film is disconnected; otherwise, judging that the heating film is not broken;
one end of the series circuit of the first switch and the first resistor is connected with the negative electrode of the battery pack, and the other end of the series circuit of the first switch and the first resistor is connected with one end of the heating positive electrode contactor connected with the heating film; one end of the series circuit of the second switch and the second resistor is connected with the anode of the battery pack, and the other end of the series circuit of the second switch and the second resistor is connected with one end of the heating cathode contactor connected with the heating film;
the method for judging whether the heating film and the battery cell are in short circuit or not is carried out according to the steps A) to D), or is carried out according to the steps a) to D):
a) When the heating film does not work, the first switch is controlled to be closed, and the second switch is controlled to be opened; acquiring the voltage U1 of the first resistor;
b) If U1 is not 0, judging that the heating film is in short circuit with the electric core; if U1 is 0, entering step C);
c) Controlling the second switch to be closed, and opening the first switch; acquiring the voltage U2 of the second resistor;
d) If U2 is not 0, judging that the heating film is in short circuit with the electric core; if U2 is 0, judging that the heating film and the battery core are not in short circuit;
a) When the heating film does not work, the second switch is controlled to be closed, and the first switch is opened; acquiring the voltage U2 of the second resistor;
b) If U2 is not 0, judging that the heating film is in short circuit with the electric core; if U2 is 0, entering step c);
c) The first switch is controlled to be closed, and the second switch is controlled to be opened; acquiring the voltage U1 of the first resistor;
d) If U1 is not 0, judging that the heating film is in short circuit with the electric core; if U1 is 0, judging that the heating film and the battery cell are not in short circuit.
2. The method for detecting a fault in a heating circuit of a battery system according to claim 1, wherein the judging result of judging that the heating film is broken in the step 3) is a preliminary judging result, and if the first switch and the second switch are closed, the voltage U1 of the first resistor and the voltage U2 of the second resistor are periodically obtained, and the continuous preliminary judging results are that the heating film is broken in the first set time, the heating film is finally determined to be broken.
3. The method for detecting a fault in a heating circuit of a battery system according to claim 1, wherein the judging result of judging the heating film and the electrical core short circuit in the step B) is a preliminary judging result, if the first switch is closed, the voltage U1 of the first resistor is periodically obtained after the second switch is opened, and the continuous preliminary judging results in the second set time are the heating film and the electrical core short circuit, and the heating film and the electrical core short circuit are finally determined.
4. The method for detecting a fault in a heating circuit of a battery system according to claim 1, wherein the judging result of judging the heating film and the electrical core short circuit in the step D) is a preliminary judging result, if the second switch is closed, after the first switch is opened, the voltage U2 of the first resistor is periodically obtained, and the continuous preliminary judging results in the second set time are the heating film and the electrical core short circuit, and then the heating film and the electrical core short circuit are finally determined.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010485909.6A CN113752907B (en) | 2020-06-01 | 2020-06-01 | Fault detection method for heating loop of battery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010485909.6A CN113752907B (en) | 2020-06-01 | 2020-06-01 | Fault detection method for heating loop of battery system |
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| CN113752907B true CN113752907B (en) | 2023-08-25 |
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| CN105336994A (en) * | 2014-07-17 | 2016-02-17 | 观致汽车有限公司 | System and method used for vehicle battery pack management |
| CN205985274U (en) * | 2016-08-17 | 2017-02-22 | 重庆长安汽车股份有限公司 | Electric motor car battery heating device |
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2020
- 2020-06-01 CN CN202010485909.6A patent/CN113752907B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015008600A (en) * | 2013-06-25 | 2015-01-15 | 株式会社Ｇｓユアサ | Switch failure diagnostic system and switch failure diagnostic method |
| CN105336994A (en) * | 2014-07-17 | 2016-02-17 | 观致汽车有限公司 | System and method used for vehicle battery pack management |
| CN105226757A (en) * | 2015-10-27 | 2016-01-06 | 北京新能源汽车股份有限公司 | The trouble-shooter of heating of battery system and method |
| CN205985274U (en) * | 2016-08-17 | 2017-02-22 | 重庆长安汽车股份有限公司 | Electric motor car battery heating device |
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