CN112242573A - Battery package weeping fault detection system and car - Google Patents
Battery package weeping fault detection system and car Download PDFInfo
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- CN112242573A CN112242573A CN202010923906.6A CN202010923906A CN112242573A CN 112242573 A CN112242573 A CN 112242573A CN 202010923906 A CN202010923906 A CN 202010923906A CN 112242573 A CN112242573 A CN 112242573A
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- detection
- leakage
- detection terminal
- resistance value
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4228—Leak testing of cells or batteries
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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
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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
- 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
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention relates to a battery pack leakage fault detection system and an automobile. The battery pack leakage fault detection system comprises a battery management system and a leakage detection mechanism; the leakage detection mechanism comprises a shell structure, a leakage detection circuit and a detection terminal structure, wherein the leakage detection circuit and the detection terminal structure are arranged in the shell structure, the detection terminal structure protrudes below the bottom of the shell structure, the detection terminal structure is electrically connected with the leakage detection circuit, and the leakage detection circuit is in communication connection with the battery management system through a signal wire; the leakage detection circuit comprises a detection circuit board and a constant resistor, wherein the detection circuit board and the constant resistor are arranged in the shell structure and are electrically connected with each other, the detection terminal structure is connected with the constant resistor in series, and the detection circuit board is in communication connection with the battery management system through the signal wire. The invention can solve the problem that the cooling system of the battery pack in the related art has a leakage fault and cannot be effectively detected.
Description
Technical Field
The invention relates to the technical field of battery pack detection, in particular to a battery pack leakage fault detection system and an automobile.
Background
At present, in a cooling system of a battery pack, liquid cooling is the most effective and widely applied mode. The liquid cooling system is mainly connected with a water pump of the whole vehicle through a liquid cooling plate and a water pipe, corresponding liquid refrigerants, generally water or a mixture of water and organic alcohol, are injected into the water pipe and the cold plate, and the water pump controls the circulation of the liquid. Strict sealing requirements are provided for the water cooling plate, the water pipe and the water pipe joint, and leakage of cooling liquid is prevented. However, the cooling liquid leakage is most likely to occur due to the limitation of the manufacturing process of the water cooling system and the unavoidable working condition influence of vibration, impact and the like during the operation of the vehicle, and the failure may cause the insulation failure of the battery pack to cause the risk of short circuit and fire. However, there is currently no effective way to perform leak fault detection.
Disclosure of Invention
The invention provides a battery pack leakage fault detection system and an automobile, and aims to solve the problem that a cooling system of a battery pack in the related art cannot effectively detect leakage faults.
In a first aspect, the present invention provides a battery pack leakage fault detection system, including:
a battery management system; and the number of the first and second groups,
the leakage detection mechanism comprises a shell structure, a leakage detection circuit and a detection terminal structure, wherein the leakage detection circuit and the detection terminal structure are arranged in the shell structure, the detection terminal structure protrudes below the bottom of the shell structure, the detection terminal structure is electrically connected with the leakage detection circuit, and the leakage detection circuit is in communication connection with the battery management system through a signal wire;
the leakage detection circuit comprises a detection circuit board and a constant resistor, wherein the detection circuit board and the constant resistor are arranged in the shell structure and are electrically connected with each other, the detection terminal structure is connected with the constant resistor in series, and the detection circuit board is in communication connection with the battery management system through the signal wire.
In some embodiments, the detection circuit board includes a resistance value detection circuit electrically connected to the constant resistor, a resistance value comparison circuit electrically connected to the resistance value detection circuit, and a fault determination circuit electrically connected to the resistance value comparison circuit, and the fault determination circuit is in communication connection with the battery management system through the signal line.
In some embodiments, when the resistance comparison circuit compares that the actual resistance detected by the resistance detection circuit is the same as the resistance of the constant resistor, the fault determination circuit determines that the battery pack has no leakage fault;
when the resistance comparison circuit compares the actual resistance detected by the resistance detection circuit with the resistance of the constant resistor, the fault judgment circuit judges that the battery pack has a leakage fault.
In some embodiments, the detection terminal structure includes a first detection terminal and a second detection terminal electrically connected to two ends of the constant resistor, respectively, the first detection terminal and the second detection terminal both protrude from the bottom of the housing structure inside the housing structure, and the first detection terminal and the second detection terminal are disposed at an interval.
In some embodiments, the leakage detection circuit includes a first constant resistance and a second constant resistance provided in the housing structure;
the detection circuit board comprises a first resistance value detection circuit electrically connected with the first constant resistor, a first resistance value comparison circuit electrically connected with the first resistance value detection circuit, and a first fault judgment circuit electrically connected with the first resistance value comparison circuit, wherein the first fault judgment circuit is in communication connection with the battery management system;
the detection circuit board comprises a second resistance value detection circuit electrically connected with the second constant resistor, a second resistance value comparison circuit electrically connected with the second resistance value detection circuit, and a second fault judgment circuit electrically connected with the second resistance value comparison circuit, wherein the second fault judgment circuit is in communication connection with the battery management system;
the liquid leakage detection mechanism comprises a first detection terminal structure and a second detection terminal structure which are arranged in the shell structure, the first detection terminal structure is electrically connected with the first constant resistance, and the second detection terminal structure is electrically connected with the second constant resistance.
In some embodiments, the first detection terminal structure and the second detection terminal structure are disposed in a staggered manner, and the length of the first detection terminal structure is different from the length of the second detection terminal structure.
In some embodiments, the housing structure includes a housing main body, and a housing mounting plate protruding from one side of the housing main body, the detection circuit board and the constant resistor are both disposed in the housing main body, and the detection terminal structure protrudes from the housing main body to below the bottom of the housing main body.
In some embodiments, the housing structure includes a plurality of supporting legs protruding from the bottom periphery of the housing main body, a detection cavity is defined between the supporting legs, and an end of the detection terminal structure protrudes from the detection cavity.
In some embodiments, the housing mounting plate includes a side connecting plate disposed on a side surface of the housing body, and a mounting fixing plate extending along a top of the side connecting plate in a direction away from the housing body, wherein the mounting fixing plate is provided with a connecting fixing hole.
In a second aspect, the invention provides an automobile, which comprises the battery pack leakage fault detection system.
The technical scheme provided by the invention has the beneficial effects that: the leakage fault of the cooling system of the battery pack can be detected in time, and the short circuit risk of the battery pack is avoided.
The embodiment of the invention provides a battery pack leakage fault detection system, which can be used for installing a shell structure of a leakage detection mechanism at a cooling system of a battery pack and enabling a detection terminal structure to correspond to a position (such as a water cooling plate, a water pipe and a water pipe joint position) where leakage easily occurs in the cooling system so as to detect whether leakage occurs or not, wherein when leakage occurs, the detection terminal structure can transmit detection information to a leakage detection circuit, and the leakage detection circuit can transmit the leakage information to a battery management system so as to send out warning information. Specifically, the detection circuit board of weeping detection circuitry can detect the resistance of constant resistance, and detection terminal structure can contact with liquid when taking place the weeping for the resistance of the constant resistance that the detection circuit board detected changes, and the detection circuit board will judge that the weeping trouble has taken place, and can give battery management system with weeping trouble information passing signal line transmission, and battery management system can take corresponding treatment to the battery package that takes place the weeping, in order to prevent to take place danger.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a battery pack leakage fault detection system according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a battery pack leakage fault detection system (not including a battery management system) according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a battery pack leakage fault detection system (not including a battery management system) according to an embodiment of the present invention;
fig. 4 is a schematic side view of a battery pack leakage fault detection system (not including a battery management system) according to an embodiment of the invention;
fig. 5 is a schematic sectional view of the section a-a of fig. 4.
In the figure: 100. a housing structure; 110. a housing main body; 120. a housing mounting plate; 130. supporting legs; 200. a liquid leakage detection circuit; 210. detecting the circuit board; 220. a constant resistance; 300. detecting the terminal structure; 310. a first detection terminal; 320. a second detection terminal; 400. a signal line; 500. a battery management system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the related art, the liquid cooling system is connected to a water pump of the vehicle through a liquid cooling plate and a water pipe, and corresponding liquid refrigerant, generally water or a mixture of water and organic alcohol, is injected into the water pipe and the cold plate, and the water pump controls circulation of the liquid. Strict sealing requirements are provided for the water cooling plate, the water pipe and the water pipe joint, and leakage of cooling liquid is prevented. However, the cooling liquid leakage is most likely to occur due to the limitation of the manufacturing process of the water cooling system and the unavoidable working condition influence of vibration, impact and the like during the operation of the vehicle, and the failure may cause the insulation failure of the battery pack to cause the risk of short circuit and fire. In order to solve the technical problem, the invention provides a battery pack leakage fault detection system and a battery pack leakage fault detection method.
As shown in fig. 1, the battery pack leakage fault detection system according to the present invention includes a battery management system 500 and a leakage detection mechanism communicatively connected to the battery management system 500 via a signal line 400. The liquid leakage detection mechanism can be arranged in the battery pack, can detect the liquid leakage condition of the battery pack, and can transmit a corresponding detection result to the battery management system 500, and the battery management system 500 can adopt corresponding processing measures to ensure the use safety of the battery pack.
Specifically, as shown in fig. 2 to 5, the aforementioned leakage detection mechanism may include a housing structure 100, and a leakage detection circuit 200 and a detection terminal structure 300 disposed in the housing structure 100, wherein the detection terminal structure 300 protrudes below the bottom of the housing structure 100, the detection terminal structure 300 is electrically connected to the leakage detection circuit 200, and the leakage detection circuit 200 is communicatively connected to the battery management system 500 through a signal line 400. The shell structure 100 of the leakage detection mechanism can be installed at the cooling system of the battery pack, and the detection terminal structure 300 corresponds to the position (such as the position of a water cooling plate, a water pipe and a water pipe joint) where leakage easily occurs in the cooling system to detect whether leakage occurs or not, when leakage occurs, the detection terminal structure 300 transmits detection information to the leakage detection circuit 200, and the leakage detection circuit 200 transmits the leakage information to the battery management system 500 to send out warning information.
In addition, the above-mentioned leakage detection circuit 200 may include a detection circuit board 210 and a constant resistor 220 disposed in the housing structure 100 and electrically connected to each other, the detection terminal structure 300 is connected in series with the constant resistor 220, and the detection circuit board 210 is communicatively connected to the battery management system 500 through a signal line 400. Specifically, the detection circuit board 210 of the leakage detection circuit 200 may detect the resistance value of the constant resistor 220, and the detection terminal structure 300 may contact with the liquid when leakage occurs, so that the resistance value of the constant resistor 220 detected by the detection circuit board 210 changes, the detection circuit board 210 may determine that a leakage fault occurs, and may transmit leakage fault information to the battery management system 500 through the signal line 400, and the battery management system 500 may take corresponding measures for the battery pack in which leakage occurs, so as to prevent danger.
Thus, signals corresponding to different resistance values, such as a first resistance value signal corresponding to the constant resistor 220 and a second resistance value signal corresponding to the non-constant resistor, can be calibrated in advance in the detection circuit board 210. When the detection terminal structure 300 is not contacted with the leakage liquid, the resistance value is kept constant (i.e. the first resistance signal is kept constant), and the detection circuit board 210 determines that there is no fault. When the detection terminal structure 300 contacts the leakage liquid, the resistance value of the constant resistor 220 is added to the internal resistance value of the leakage liquid itself, so that the total resistance value changes (i.e., a second resistance value signal is generated). Through the change of the resistance value, the detection circuit board 210 CAN determine that a leakage fault occurs at this time, and send a fault signal to the battery management system 500 through the signal line 400(CAN bus) to give an alarm.
Furthermore, in some embodiments, the detection circuit board 210 may include a resistance value detection circuit electrically connected to the constant resistor 220, a resistance value comparison circuit electrically connected to the resistance value detection circuit, and a fault determination circuit electrically connected to the resistance value comparison circuit, wherein the fault determination circuit is communicatively connected to the battery management system 500 through a signal line. The resistance value detection circuit may detect the resistance value of the constant resistor 220 and transmit the detected resistance value to the resistance value comparison circuit for comparison, and the resistance value comparison circuit may transmit the comparison result to the fault determination circuit, and the fault determination circuit may determine whether a leakage fault occurs and may transmit the determination result to the battery management system 500.
Moreover, in some embodiments, when the actual resistance value detected by the resistance value comparison circuit is the same as the resistance value of the constant resistor 220, the fault judgment circuit judges that the battery pack has no leakage fault; when the actual resistance value detected by the resistance value comparison circuit is different from the resistance value of the constant resistor 220, the fault judgment circuit judges that the battery pack has a leakage fault. When liquid leakage occurs, the detection terminal structure 300 can be in contact with the leaked liquid, and the leaked liquid has a certain resistance value, so that the resistance value detected by the resistance value detection circuit of the detection circuit board 210 is different from the resistance value of the constant resistor 220, and the occurrence of liquid leakage can be judged.
In addition, in some embodiments, the above-mentioned detection terminal structure 300 may include a first detection terminal 310 and a second detection terminal 320 electrically connected to two ends of the constant resistor 220, respectively, wherein the first detection terminal 310 and the second detection terminal 320 both protrude from the bottom of the housing structure 100 inside the housing structure 100, and the first detection terminal 310 and the second detection terminal 320 are disposed at intervals. Through setting up two detection terminal, when two detection terminal all contacted the liquid of revealing, the resistance of the constant resistance 220 that detects will change, also is difficult for taking place the false retrieval.
Further, in some embodiments, the above-described leakage detection circuit may include a first constant resistance and a second constant resistance provided in the case structure 100; the detection circuit board 210 may include a first resistance value detection circuit electrically connected to the first constant resistor, a first resistance value comparison circuit electrically connected to the first resistance value detection circuit, and a first fault determination circuit electrically connected to the first resistance value comparison circuit, the first fault determination circuit being in communication with the battery management system; moreover, the detection circuit board 210 may further include a second resistance value detection circuit electrically connected to the second constant resistor, a second resistance value comparison circuit electrically connected to the second resistance value detection circuit, and a second fault determination circuit electrically connected to the second resistance value comparison circuit, the second fault determination circuit being in communication connection with the battery management system 500; moreover, the above-mentioned leakage detection mechanism may include a first detection terminal structure and a second detection terminal structure provided in the case structure 100, the first detection terminal structure being electrically connected to the first constant resistance, and the second detection terminal structure being electrically connected to the second constant resistance. Two leakage detection circuits can be arranged, double-circuit redundancy detection function is achieved, and error detection is prevented.
Moreover, the first detection terminal structure and the second detection terminal structure are arranged in a staggered mode, and the length of the first detection terminal structure is different from that of the second detection terminal structure. Through detecting terminal structure with first detection terminal structure and second and detecting terminal structure setting in position department of difference, can detect different positions on the plane simultaneously, can make the testing result accurate reliable like this. Moreover, the length of the first detection terminal structure and the length of the second detection terminal structure are set to be different, so that different positions in the height direction can be detected, and the detection result is more accurate.
In addition, the housing structure 100 may include a housing body 110, and a housing mounting plate 120 protruding from one side of the housing body 110, the detection circuit board 210 and the constant resistor 220 are both disposed in the housing body 110, and the detection terminal structure 300 protrudes from the inside of the housing body 110 to a position below the bottom of the housing body 110. The detection circuit board 210 and the constant resistor 220 can be packaged through the shell body 110, so that the danger of short circuit caused by contact with leaked liquid is avoided; by arranging the casing mounting plate 120 on the casing main body 110, the whole leakage detection mechanism is conveniently mounted on the bottom casing or the side casing of the battery pack through the casing mounting plate 120, and the whole leakage detection mechanism corresponds to the outer casing of the cooling system of the battery pack, particularly the protruding part of the detection terminal structure 300 corresponds to the position where leakage easily occurs, such as a water cooling plate, a water pipe joint and the like of the cooling system, so as to detect the leakage condition of the cooling liquid.
Further, the housing structure 100 may include a plurality of supporting legs 130 protruding from the bottom periphery of the housing main body 110, a detection cavity is defined between the supporting legs 130, and an end of the detection terminal structure 300 protrudes into the detection cavity. By arranging the end portions of the first detection terminal 310 and the second detection terminal 320 of the detection terminal structure 300 in the detection cavity at the bottom of the housing main body 110 in a protruding manner, the detection terminals in the detection cavity can be protected by the plurality of supporting legs 130, and the whole liquid leakage detection mechanism can be supported by the plurality of supporting legs 130, so that the liquid leakage detection mechanism is stable in the using process, and the first detection terminal 310 and the second detection terminal 320 are stable and are not prone to skew, thereby causing inaccurate detection. Moreover, gaps are formed among the supporting legs 130, so that the detection cavity is communicated with the outside, and the flowing of liquid inside and outside the detection cavity is not influenced.
Moreover, the housing mounting plate 120 may include a side connecting plate disposed on a side surface of the housing body 110, and a mounting fixing plate extending along a top of the side connecting plate in a direction away from the housing body, the mounting fixing plate being provided with a connecting fixing hole. Can set up casing mounting panel 120 to L shaped plate structure, be convenient for through the installation fixed plate at top with other structures be connected fixedly (can dismantle through the casing of wearing to establish connecting screw and battery package in connecting fixed orifices department and be connected), also can be fixed through side connecting plate and other structural connection in addition, connect convenient and reliable. The case attachment plate 120 may be integrated with the case main body 110 or may be provided independently of each other.
In addition, the invention also provides an automobile which comprises the battery pack leakage fault detection system. When the battery pack has a leakage fault, the battery pack leakage fault detection system can detect the fault in time and transmit a fault signal to the battery management system in time to perform early warning.
The technical scheme provided by the invention has the beneficial effects that: the leakage fault of the cooling system of the battery pack can be detected in time, and the short circuit risk of the battery pack is avoided.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A battery pack leakage fault detection system, comprising:
a battery management system; and the number of the first and second groups,
the leakage detection mechanism comprises a shell structure, a leakage detection circuit and a detection terminal structure, wherein the leakage detection circuit and the detection terminal structure are arranged in the shell structure, the detection terminal structure protrudes below the bottom of the shell structure, the detection terminal structure is electrically connected with the leakage detection circuit, and the leakage detection circuit is in communication connection with the battery management system through a signal wire;
the leakage detection circuit comprises a detection circuit board and a constant resistor, wherein the detection circuit board and the constant resistor are arranged in the shell structure and are electrically connected with each other, the detection terminal structure is connected with the constant resistor in series, and the detection circuit board is in communication connection with the battery management system through the signal wire.
2. The battery pack leakage fault detection system of claim 1, wherein the detection circuit board comprises a resistance value detection circuit electrically connected to the constant resistor, a resistance value comparison circuit electrically connected to the resistance value detection circuit, and a fault determination circuit electrically connected to the resistance value comparison circuit, the fault determination circuit being in communication with the battery management system via the signal line.
3. The battery pack leakage fault detection system according to claim 2, wherein when the resistance comparison circuit compares that the actual resistance value detected by the resistance detection circuit is the same as the resistance value of the constant resistor, the fault judgment circuit judges that the battery pack has no leakage fault;
when the resistance comparison circuit compares the actual resistance detected by the resistance detection circuit with the resistance of the constant resistor, the fault judgment circuit judges that the battery pack has a leakage fault.
4. The battery pack leakage fault detection system of claim 2, wherein the detection terminal structure comprises a first detection terminal and a second detection terminal electrically connected to two ends of the constant resistor, respectively, wherein the first detection terminal and the second detection terminal both protrude from the bottom of the housing structure inside the housing structure, and the first detection terminal and the second detection terminal are spaced apart from each other.
5. The battery pack leakage fault detection system of claim 2, wherein said leakage detection circuit includes a first constant resistance and a second constant resistance disposed in said housing structure;
the detection circuit board comprises a first resistance value detection circuit electrically connected with the first constant resistor, a first resistance value comparison circuit electrically connected with the first resistance value detection circuit, and a first fault judgment circuit electrically connected with the first resistance value comparison circuit, wherein the first fault judgment circuit is in communication connection with the battery management system;
the detection circuit board comprises a second resistance value detection circuit electrically connected with the second constant resistor, a second resistance value comparison circuit electrically connected with the second resistance value detection circuit, and a second fault judgment circuit electrically connected with the second resistance value comparison circuit, wherein the second fault judgment circuit is in communication connection with the battery management system;
the liquid leakage detection mechanism comprises a first detection terminal structure and a second detection terminal structure which are arranged in the shell structure, the first detection terminal structure is electrically connected with the first constant resistance, and the second detection terminal structure is electrically connected with the second constant resistance.
6. The battery pack leakage fault detection system of claim 5, wherein the first detection terminal structure and the second detection terminal structure are arranged in a staggered manner, and the length of the first detection terminal structure is different from the length of the second detection terminal structure.
7. The battery pack leakage failure detection system according to any one of claims 1 to 6, wherein the case structure includes a case main body, and a case mounting plate protruding from one side of the case main body, the detection circuit board and the constant resistor are both provided in the case main body, and the detection terminal structure protrudes from the inside of the case main body to below the bottom of the case main body.
8. The battery pack leakage fault detection system of claim 7, wherein the housing structure comprises a plurality of support legs protruding from the periphery of the bottom of the housing main body, a detection cavity is defined between the support legs, and an end of the detection terminal structure protrudes from the detection cavity.
9. The battery pack leakage fault detection system of claim 7, wherein the housing mounting plate includes side connection plates disposed on the sides of the housing body, and mounting and fixing plates extending along the top of the side connection plates in a direction away from the housing body, the mounting and fixing plates having connection and fixing holes.
10. An automobile characterized by comprising the battery pack leakage failure detection system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010923906.6A CN112242573B (en) | 2020-09-04 | 2020-09-04 | Battery package weeping fault detection system and car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010923906.6A CN112242573B (en) | 2020-09-04 | 2020-09-04 | Battery package weeping fault detection system and car |
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| CN112242573A true CN112242573A (en) | 2021-01-19 |
| CN112242573B CN112242573B (en) | 2022-05-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113479074A (en) * | 2021-06-22 | 2021-10-08 | 东风柳州汽车有限公司 | Battery package structure, detecting system and vehicle |
| CN113745678A (en) * | 2021-07-23 | 2021-12-03 | 东风汽车集团股份有限公司 | Battery pack cooling liquid leakage detection device, battery pack box body and electric vehicle |
| CN114243130A (en) * | 2021-12-20 | 2022-03-25 | 广州小鹏汽车科技有限公司 | Battery pack leakage detection method, battery pack, vehicle and storage medium |
| WO2023044647A1 (en) * | 2021-09-23 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and manufacturing method for battery |
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