CN217062368U - Battery package BDU structure, battery package and vehicle - Google Patents
Battery package BDU structure, battery package and vehicle Download PDFInfo
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- CN217062368U CN217062368U CN202123073480.9U CN202123073480U CN217062368U CN 217062368 U CN217062368 U CN 217062368U CN 202123073480 U CN202123073480 U CN 202123073480U CN 217062368 U CN217062368 U CN 217062368U
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- 229910052802 copper Inorganic materials 0.000 claims description 43
- 239000010949 copper Substances 0.000 claims description 43
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Abstract
The utility model relates to the technical field of vehicles, especially, relate to a battery package BDU structure, battery package and vehicle. The battery pack BDU structure provided by the present disclosure includes a housing formed with a main positive loop and a main negative loop; wherein, be equipped with first current acquisition module and second current acquisition module in the casing, first current acquisition module is used for adopting the electric current of lumped positive return circuit, and second current acquisition module is used for adopting the electric current of lumped negative return circuit. First current acquisition module and second current acquisition module can correct the mutual precision to the current contrast detection in total positive return circuit and total negative return circuit, improves the accuracy that detects, and when one of them became invalid, another can regard as the monitoring point to detect the current value, and the current value of gathering can be through pencil structure with signal transmission for battery management system, has improved the security of BDU structure.
Description
Technical Field
The utility model relates to the technical field of vehicles, especially, relate to a battery package BDU structure, battery package and vehicle.
Background
With the continuous development of new energy technology, new energy products are continuously popularized, the market share of electric vehicles is continuously improved, and a battery system distribution Box (BDU) serving as an important electronic control component of the new energy products also becomes a hotspot of research and development. At present, a distribution box of a battery system is mostly composed of an upper shell, a lower shell, a copper bar and corresponding functional electrical elements.
The service life and the safety of the BDU directly influence the service life and the safety of the battery pack, the traditional integrated BDU main loop is only provided with the positive current acquisition module, and once the signals and the precision of the current acquisition module deviate, wrong information can be output to the battery management system, so that wrong judgment and execution commands can be made, and the safety of the battery pack is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem or at least partially solve the technical problem, the present disclosure provides a battery pack BDU structure, a battery pack, and a vehicle.
A first aspect of the present disclosure provides a battery pack BDU structure, including: a housing having a total positive circuit and a total negative circuit formed therein;
the total positive loop is used for communicating the positive electrode of the module or the battery cell with the positive electrode of the battery pack, and the total negative loop is used for communicating the negative electrode of the module or the battery cell with the negative electrode of the battery pack;
the shell is internally provided with a first current acquisition module and a second current acquisition module, the first current acquisition module is used for acquiring the current of the total positive loop, and the second current acquisition module is used for acquiring the current of the total negative loop.
Further, the shell is provided with a BDU positive electrode connected with the module or the battery cell positive electrode and a BDU negative electrode connected with the module or the battery cell negative electrode;
the BDU positive pole and the BDU negative pole are positioned on two sides of the shell along the length direction of the shell;
the first current collection module is close to the BDU anode, and the second current collection module is close to the BDU cathode.
Further, the battery pack BDU structure also comprises a wire harness structure used for connecting various electrical components;
the wiring harness structure comprises a high-voltage acquisition wiring harness and a low-voltage control wiring harness, and the high-voltage acquisition wiring harness and the low-voltage control wiring harness respectively face to two sides of the shell to be output.
Further, the BDU structure of the battery pack also comprises a copper bar used for connecting each electrical element;
along the height direction of casing, the copper bar is located the middle part region or the upper portion region of casing, the output part of pencil structure is located the lower part region of casing.
Furthermore, the first current acquisition module comprises a first Hall sensor, a connecting copper bar of the main positive loop penetrates through the first Hall sensor, and the first Hall sensor is connected with the communication connector through an acquisition wiring harness;
and/or the second current acquisition module comprises a second Hall sensor, the connecting copper bar of the total negative loop penetrates through the second Hall sensor, and the second Hall sensor is connected with the communication connector through an acquisition wiring harness.
Further, the total positive circuit comprises a positive electrode input copper bar, a first current collection module, a main positive fuse, a main positive relay, a main positive connection copper bar and a main positive output copper bar which are sequentially connected in series.
Further, the battery pack BDU structure further comprises a pre-charging loop, wherein the pre-charging loop is connected with the main positive relay in parallel;
the pre-charging circuit comprises a pre-charging relay and a pre-charging resistor which are connected in series.
Further, the total negative loop comprises a negative input copper bar, a second current collection module, a negative connection copper bar, a negative relay and a negative output copper bar which are sequentially connected in series.
The second aspect of the present disclosure provides a battery pack, including the BDU structure of the battery pack.
A third aspect of the present disclosure provides a vehicle including the battery pack.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the BDU structure of the battery pack provided by the embodiment of the disclosure comprises a shell, wherein a total positive loop and a total negative loop are formed in the shell; wherein, be equipped with first current acquisition module and second current acquisition module in the casing, first current acquisition module is used for adopting the electric current of lumped positive return circuit, and second current acquisition module is used for adopting the electric current of lumped negative return circuit. First current acquisition module and second current acquisition module can be to total positive return circuit and total negative return circuit's current contrast detection, and mutual precision is corrected, improves the accuracy that detects, and when one in first current acquisition module and the second current acquisition module became invalid, another in first current acquisition module and the second current acquisition module can regard as the monitoring point to detect the current value, has promoted the security of battery package BDU structure, and then has promoted the security of battery package.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is an exploded view of a BDU structure of a battery pack according to an embodiment of the disclosure;
fig. 2 is a schematic top view of a BDU structure of a battery pack according to an embodiment of the disclosure;
fig. 3 is a schematic perspective view illustrating a BDU structure of a battery pack according to an embodiment of the disclosure;
fig. 4 is a schematic side view of a BDU structure of a battery pack according to an embodiment of the disclosure.
Reference numerals: 1. a housing; 21. the positive electrode is input into the copper bar; 22. a first current collection module; 23. a main positive fuse; 24. a main positive relay; 25. the main positive connecting copper bar; 26. a main positive output copper bar; 31. a negative electrode input copper bar; 32. a second current collection module; 33. the negative electrode is connected with the copper bar; 34. a negative relay; 35. a negative output copper bar; 41. a pre-charging relay; 42. pre-charging a resistor; 51. collecting the wire harness at high voltage; 52. a low voltage control harness; 2. and (6) copper bars.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
The battery package includes battery package BDU structure, and battery package BDU structure sets up in the battery package usually, and life-span and the safety of BDU directly influence the life-span and the safety of battery package, provide a battery package BDU structure, battery package and vehicle based on this disclosed embodiment.
The BDU structure of the battery pack provided by the embodiment of the disclosure can realize high compactness, high integration and high safety performance. The BDU structure of the battery pack saves the internal space of the battery pack and improves the energy density of the battery pack system. The positive and negative poles of the battery pack are arranged in a partition mode, the positions of the components and the wire harnesses are adjusted on the premise that the gap between the components meets the requirements, the size of the BDU structure of the battery pack is reduced, and the cost of the battery pack system is reduced.
As shown in fig. 1, 2, 3 and 4, a BDU structure of a battery pack according to an embodiment of the present disclosure includes a casing 1, in which a total positive loop and a total negative loop are formed; the total positive loop is used for communicating the positive electrode of the module with the positive electrode of the battery pack, and the total negative loop is used for communicating the negative electrode of the module with the negative electrode of the battery pack; the housing 1 is provided with a first current collection module 22 and a second current collection module 32, the first current collection module 22 is used for collecting current of a total positive loop, and the second current collection module 32 is used for collecting current of a total negative loop. First current acquisition module 22 and second current acquisition module 32 can be to total positive return circuit and total negative return circuit's current contrast detection, mutual precision is corrected, improve the accuracy that detects, when one in first current acquisition module 22 and the second current acquisition module 32 became invalid, another in first current acquisition module 22 and the second current acquisition module 32 can regard as the monitoring point to detect the current value, the current value of gathering can be through pencil structure with signal transmission for battery management system, the security of battery package BDU structure has been promoted, and then the security of battery package has been promoted.
It should be noted that the total positive circuit is a circuit formed by connecting the positive electrode of the module or the battery cell to the positive electrode of the battery pack; the total negative loop is a loop formed by communicating the negative electrode of the module or the battery core to the negative electrode of the battery pack. In this embodiment, the positive electrode of the battery pack is the positive electrode of the front drive or the positive electrode of the rear drive, and the negative electrode of the battery pack is the negative electrode of the front drive or the negative electrode of the rear drive.
In some specific embodiments, the shell 1 is provided with a BDU positive electrode for connecting with a module or a cell positive electrode and a BDU negative electrode for connecting with a module or a cell negative electrode; along the length direction of the shell 1, the BDU positive pole and the BDU negative pole are positioned at two sides of the shell 1; first current collection module 22 is disposed proximate to the BDU anode and second current collection module 32 is disposed proximate to the BDU cathode. The shell 1 is provided with a BDU anode and a BDU cathode, and the BDU anode and the BDU cathode are positioned on two sides of the shell 1 along the length direction X of the shell 1, wherein the length direction X is the left-right direction in the figure 1, so that the effects of high compactness, high integration and high safety performance can be realized. The BDU structure of the battery pack saves the internal space of the battery pack and improves the energy density of the battery pack system. The positive and negative electrodes of the battery pack are arranged in a partitioning mode, the positions of the parts and the wire harnesses are adjusted on the premise that the gap between the parts meets the requirement, the size of the BDU structure of the battery pack is reduced, and the cost of a battery pack system is reduced.
First current collection module 22 is disposed proximate to the BDU anode and second current collection module 32 is disposed proximate to the BDU cathode. First current acquisition module 22 and second current acquisition module 32 are located the both ends of casing 1 internal length direction X respectively, can detect the electric current in total positive return circuit and total negative return circuit respectively, can compare the result that detects, mutual precision is corrected, the accuracy of detection has been improved, when one in first current acquisition module 22 and second current acquisition module 32 became invalid, another in first current acquisition module 22 and the second current acquisition module 32 can regard as the monitoring point and detect the current value, the current value of gathering can be through pencil structure with signal transmission for battery management system, the security of battery package BDU structure has been promoted, and then the security of battery package has been promoted.
In some specific embodiments, the battery pack BDU structure further includes a harness structure for connecting the electrical components; the wiring harness structure comprises a high-voltage collecting wiring harness 51 and a low-voltage control wiring harness 52, the high-voltage collecting wiring harness 51 and the low-voltage control wiring harness 52 are respectively output towards the two sides of the shell 1, specifically, the two sides refer to the left side and the right side in fig. 1, the wiring harness structure trend is reduced in the crossing phenomenon, the possibility of short circuit is reduced, wiring of the wiring harness structure is neat and attractive, and the space occupied by the wiring harness structure can be reduced. The condition that the shell 1 is complicated due to more electrical elements is avoided, the possibility of short circuit is reduced, and the safety of the BDU structure is improved.
Optionally, the high-voltage collecting harness 51 and the low-voltage control harness 52 are respectively located in two wiring grooves at the bottom of the housing 1, so that the safety of the harness structure is improved. Optionally, the high-voltage collecting harness 51 and the low-voltage control harness 52 may be fixed in the corresponding cabling channels by the clamping members.
As shown in fig. 1 and fig. 4, the BDU structure of the battery pack further includes a copper bar 2 for connecting each electrical component, the copper bar 2 is located in the middle region or the upper region of the casing 1, the output portion of the wiring harness structure is located in the lower region of the casing 1, the wiring of the wiring harness structure is neat and beautiful, the problem that the wiring harness structure is complicated due to more electrical components in the casing 1 is avoided, the copper bar and the wiring harness structure are partitioned vertically, the possibility that the copper bar rubs the wiring harness structure is reduced, the safety of the wiring harness structure is improved, the crossing phenomenon is reduced in the direction of the series connection copper bar and wiring harness structure, the possibility of short circuit is reduced, the safety of the BDU structure of the battery pack is improved, and further the safety of the battery pack is improved.
In some embodiments, the first current collecting module 22 includes a first hall sensor, the connecting copper bar of the total positive loop passes through the first hall sensor, the first hall sensor is connected with the communication connector through the collecting wiring harness, the value of the total positive loop current can be collected through the first hall sensor, and the wiring harness structure and the connector transmit the signal to the battery management system. The second current collection module 32 comprises a second Hall sensor, a connecting copper bar of a total negative circuit passes through the second Hall sensor, the second Hall sensor is connected with a communication connector through a collection wiring harness, the magnitude of the current value of the total negative circuit can be collected through the second Hall sensor, and a wiring harness structure and the connector transmit signals to a battery management system. First hall sensor and second hall sensor can detect the electric current in total positive return circuit and total negative return circuit respectively, can contrast the result that detects, mutual precision is corrected, the accuracy of detection has been improved, when one among first hall sensor and the second hall sensor became invalid, another among first hall sensor and the second hall sensor can regard as the monitoring point to detect the current value, the current value of gathering can be through the pencil structure with signal transmission for battery management system, the security of battery package BDU structure has been promoted, and then the security of battery package has been promoted.
In some specific embodiments, the total positive circuit includes a positive input copper bar 21, a first current collecting module 22, a main positive fuse 23, a main positive relay 24, a main positive connection copper bar 25, and a main positive output copper bar 26, which are sequentially connected in series. The first current collecting module 22 can monitor the current of the main positive loop, record the current value as a detection point, and transmit the signal to the battery management system through the wire harness structure and the connector. The actuation and the disconnection of main positive relay 24 are passed through to total positive return circuit, the switching on and closing of total positive return circuit of control, optionally, total positive return circuit can be through the coil break-make that low-voltage signal connector controlled main positive relay 24, thereby control main contact group opens and shuts, battery package management system is according to the current signal of anodal input copper bar 21, can be through the electric current size of control car battery package, thereby control the electric current on the total positive return circuit, main positive fuse 23 is used for the protection to other devices on the main positive return circuit when overflowing, main positive fuse 23 protects total positive return circuit, can avoid burning out electrical components, the security performance of devices such as inside main positive relay 24 of battery package BDU structure has been promoted, the security of battery package BDU structure has been promoted, and then the security of battery package has been promoted.
Main positive fuse 23 can fast fuse when total positive return circuit short-circuit fault appears to disconnection high-voltage circuit can prevent that the battery package from appearing the thermal runaway, has promoted the security of battery package BDU structure, and then has promoted the security of battery package.
In some specific embodiments, the total negative circuit includes a negative input copper bar 31, a second current collecting module 32, a negative connection copper bar 33, a negative relay 34, and a negative output copper bar 35, which are sequentially connected in series. The second current collecting module 32 can monitor the current of the total negative loop, can record the current value as a detection point, and transmits the signal to the battery management system through a wiring harness structure and a connector. Total negative return circuit passes through the actuation and the disconnection of negative pole relay 34, control switching on and closing of total negative return circuit, it is optional, total negative return circuit can control negative pole relay 34's coil switching on and off through the low-voltage signal connector, thereby control main contact group opens and shuts, battery package management system is according to the current signal of negative pole input copper bar 31, can be through the electric current size of control car battery package, thereby control the electric current in the total negative return circuit, the security performance of devices such as the inside negative pole relay 34 of battery package BDU structure has been promoted, the security of battery package BDU structure has been promoted, and then the security of battery package has been promoted.
Optionally, the battery pack BDU structure that this disclosed embodiment provided is provided with negative pole relay 34 in casing 1, and negative pole relay 34 can control the closure and the disconnection in high-voltage circuit through low-voltage signal, and when the battery pack was filled, discharged, the closure and the disconnection in high-voltage circuit were controlled with negative pole relay 34, if take place short circuit and thermal runaway trouble, can in time break high-voltage circuit, promoted the security of battery pack BDU structure, and then promoted the security of battery pack.
The second end of the overall positive loop may be connected with the positive end of the external load and the second end of the overall negative loop may be connected with the negative end of the external load. The external load can be an electric device, and power is supplied through a power battery pack to work so as to meet the functional requirements of a user on the automobile. The total positive loop and the total negative loop are integrated in the shell 1, the problems that the structure is complex and the cost is high due to the fact that the total positive loop and the total negative loop are specially designed outside are solved, the length of a wire harness in the whole vehicle is shortened, loss on the wire harness when a battery pack supplies energy is reduced, the circuit structure is simple, the circuit cost is reduced, the application range is wide, the function integration level is high, the reliability is good, and the safety is high.
In some embodiments, the battery pack BDU structure further includes a pre-charge circuit connected in parallel with the main positive relay 24; the pre-charging circuit includes a pre-charging relay 41 and a pre-charging resistor 42 connected in series. The electrical components of the pre-charge circuit include a pre-charge relay 41 and a pre-charge resistor 42 connected in series by a wire harness structure. The pre-charge resistor 42 functions to reduce the rush current. The pre-charging loop is used for protecting an electrical component, the electrical component is in direct contact with the electrical component, the current ratio is large, contact ablation is easily caused, the current in a line can be reduced through the pre-charging loop, the safety performance of the electrical component in the BDU structure of the battery pack is improved, the safety of the BDU structure of the battery pack is improved, and the safety of the battery pack is further improved.
The battery pack provided by the embodiment of the disclosure comprises the BDU structure of the battery pack provided by the embodiment of the disclosure. The vehicle that this disclosure embodiment provided includes the battery package that this disclosure embodiment provided. Since the battery pack or the vehicle provided by the embodiment of the present disclosure has the same advantages as the BDU structure of the battery pack provided by the embodiment of the present disclosure, the description thereof is omitted.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be 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 previous description is only for the purpose of describing particular embodiments of the present disclosure, so as to enable those skilled in the art to understand or implement the present disclosure. 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 disclosure. Thus, the present disclosure 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 BDU structure, comprising: a housing having a total positive circuit and a total negative circuit formed therein;
the total positive loop is used for communicating the positive electrode of the module or the battery cell with the positive electrode of the battery pack, and the total negative loop is used for communicating the negative electrode of the module or the battery cell with the negative electrode of the battery pack;
the shell is internally provided with a first current acquisition module and a second current acquisition module, the first current acquisition module is used for acquiring the current of the total positive loop, and the second current acquisition module is used for acquiring the current of the total negative loop.
2. The BDU structure of the battery pack as claimed in claim 1, wherein the shell is provided with a BDU positive pole for connecting with a module or a cell positive pole and a BDU negative pole for connecting with a module or a cell negative pole;
the BDU positive pole and the BDU negative pole are positioned on two sides of the shell along the length direction of the shell;
the first current collection module is close to the BDU anode, and the second current collection module is close to the BDU cathode.
3. The battery pack BDU structure of claim 1, further comprising a harness structure for connecting electrical components;
the wiring harness structure comprises a high-voltage acquisition wiring harness and a low-voltage control wiring harness, and the high-voltage acquisition wiring harness and the low-voltage control wiring harness respectively face to two sides of the shell to be output.
4. The battery pack BDU structure of claim 3, further comprising copper bars for connecting each of said electrical components;
along the height direction of the shell, the copper bars are located in the middle area or the upper area of the shell, and the output part of the wiring harness structure is located in the lower area of the shell.
5. The battery pack BDU structure of claim 1, wherein the first current collection module comprises a first Hall sensor, the connecting copper bar of the main positive loop passes through the first Hall sensor, and the first Hall sensor is connected with a communication connector through a collection wire harness;
and/or the second current acquisition module comprises a second Hall sensor, the connecting copper bar of the total negative loop penetrates through the second Hall sensor, and the second Hall sensor is connected with the communication connector through an acquisition wiring harness.
6. The battery pack BDU structure of claim 1, wherein the total positive loop comprises a positive input copper bar, the first current collection module, a main positive fuse, a main positive relay, a main positive connection copper bar and a main positive output copper bar, which are connected in series in sequence.
7. The battery pack BDU structure of claim 6, further comprising a pre-charge circuit connected in parallel with the main positive relay;
the pre-charging circuit comprises a pre-charging relay and a pre-charging resistor which are connected in series.
8. The battery pack BDU structure of claim 1, wherein the overall negative loop includes a negative input copper bar, the second current collection module, a negative connection copper bar, a negative relay and a negative output copper bar connected in series in sequence.
9. A battery pack including the BDU structure of the battery pack according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the battery pack according to claim 9.
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| CN202123073480.9U CN217062368U (en) | 2021-12-08 | 2021-12-08 | Battery package BDU structure, battery package and vehicle |
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| CN202123073480.9U CN217062368U (en) | 2021-12-08 | 2021-12-08 | Battery package BDU structure, battery package and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024149406A1 (en) * | 2023-08-01 | 2024-07-18 | 惠州亿纬锂能股份有限公司 | Battery pack and electric vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024149406A1 (en) * | 2023-08-01 | 2024-07-18 | 惠州亿纬锂能股份有限公司 | Battery pack and electric vehicle |
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