CN220262613U - SOH monitoring system of power battery and vehicle with SOH monitoring system - Google Patents
SOH monitoring system of power battery and vehicle with SOH monitoring system Download PDFInfo
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- CN220262613U CN220262613U CN202322333566.3U CN202322333566U CN220262613U CN 220262613 U CN220262613 U CN 220262613U CN 202322333566 U CN202322333566 U CN 202322333566U CN 220262613 U CN220262613 U CN 220262613U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 239000000178 monomer Substances 0.000 claims abstract description 30
- 230000004308 accommodation Effects 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims 3
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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Abstract
The utility model provides a power battery SOH monitoring system which comprises a battery pack and a control unit, wherein the battery pack comprises an expansion force collector and a plurality of battery monomers, the battery monomers are sequentially arranged, the expansion force collector is arranged in the battery pack and is in contact with the battery monomers, the expansion force collector is used for collecting expansion force generated by expansion of the battery monomers and is electrically connected with the control unit so as to transmit the collected expansion force information into the control unit, and the control unit obtains SOH data of the power battery according to the expansion force information of the battery monomers. The expansion force collected by the expansion force collector reflects the comprehensive acting force generated by the expansion of the plurality of battery cells, and the SOH (state of health) of the power battery can be monitored more easily through the expansion force of the power battery when the vehicle runs.
Description
Technical Field
The utility model relates to the technical field of vehicle parts, in particular to a power battery SOH monitoring system and a vehicle with the same.
Background
Along with the high-speed development of electric automobiles, the technical development of power batteries is also continuously broken through. In recent years, the energy density of the power battery is continuously improved, and the management and control strategy of the whole battery is also continuously optimized.
SOH (state of health) of a power battery is one of important indicators for evaluating the performance of the power battery. In the prior art, SOH of a power battery applied to a vehicle is generally evaluated by a BMS-based control strategy in combination with other required detection parameters. But this method is more complex and costly.
In the case of testing a power cell, there is a report that SOH of the power cell is evaluated by measuring the swelling force of the power cell. The battery monomer forming the power battery is taken out independently, the expansion force acquisition device is pressed on the battery monomer through a special structure, and then the corresponding relation between the expansion force and the SOH of the power battery is established, so that the SOH performance of the power battery is evaluated through the detection of the expansion force. However, in the prior art, this method can only be used in the test, and it is difficult to apply the method directly to a real vehicle.
Disclosure of Invention
The utility model provides a power battery SOH monitoring system and a vehicle with the same, wherein the power battery can monitor SOH (state of health) of the power battery more easily through expansion force of the power battery when the vehicle runs.
The utility model provides a power battery SOH monitoring system which comprises a battery pack and a control unit, wherein the battery pack comprises an expansion force collector and a plurality of battery monomers, the battery monomers are sequentially arranged, the expansion force collector is arranged in the battery pack and is in contact with the battery monomers, the expansion force collector is used for collecting expansion force generated by expansion of the battery monomers and is electrically connected with the control unit so as to transmit the collected expansion force information into the control unit, and the control unit obtains SOH data of the power battery according to the expansion force information of the battery monomers.
Further, the battery pack is a module-level battery pack, the battery pack comprises a plurality of battery modules, each battery module comprises a battery cell formed by sequentially arranging a plurality of battery monomers, end plates positioned at two ends of the battery cell, the expansion force collector is a film pressure sensor, and the film pressure sensor is arranged between two adjacent battery monomers or between the battery monomers and the end plates.
Further, a plurality of reinforcing ribs are arranged on one side, facing the battery cells, of the end plate, the heights of the reinforcing ribs are equal, and the reinforcing ribs are located on the same plane towards one end, facing the battery cells, of the end plate.
Further, the film pressure sensor comprises a film layer and a supporting bar arranged on the film layer, wherein the supporting bar comprises a first supporting bar extending along a first direction and a second supporting bar extending along a second direction, and the first supporting bar and the second supporting bar are intersected.
Further, the battery pack is a CTP battery pack, the battery pack comprises a plurality of battery cells and a frame for bearing the battery cells, the battery cells are sequentially distributed, the expansion force collector comprises a collector body and a collecting end head, the collector body is embedded into the frame, and the collecting end head extends out of the frame and contacts with the battery cells.
Further, the frame includes along the same a plurality of in the electric core the longeron that the direction was arranged to battery monomer extends, and with longeron mutually perpendicular's crossbeam, the longeron with the crossbeam is crossing to form the accommodation space, the electric core set up in the accommodation space, the collector body buries in the crossbeam, the collection end stretches out outside the frame.
Further, a plurality of accommodating spaces are formed in the frame, and each accommodating space is internally provided with the battery cell and the expansion force collector.
Further, the expansion force collector is a strain type pressure sensor.
Further, a signal line for transmitting the expansion force collector is electrically connected with the control unit through a wire harness interface on the battery pack.
The utility model also provides a vehicle comprising the SOH monitoring system of the power battery.
In summary, the expansion force collector is directly integrated in the battery pack, that is, the battery pack is used for tightly attaching and fixing the battery monomer and the expansion force collector. Because in the power battery, a plurality of battery monomers are sequentially arranged, in the same battery pack, acting forces generated by the expansion of a certain battery monomer and the expansion of a plurality of battery monomers can be transmitted to an expansion force collector, the expansion force collected by the expansion force collector reflects the comprehensive acting force generated by the expansion of a plurality of battery monomers, and SOH (state of health) of the power battery can be monitored more easily through the expansion force of the power battery when a vehicle runs.
The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model, as well as the preferred embodiments thereof, together with the following detailed description of the utility model, given by way of illustration only, together with the accompanying drawings.
Drawings
Fig. 1 is a system block diagram of a SOH monitoring system for a power battery according to a first embodiment of the present utility model.
Fig. 2 is a schematic exploded view of a power cell according to a first embodiment of the present utility model.
FIG. 3 is a schematic diagram of the structure of the film pressure sensor of FIG. 2.
Fig. 4 is a schematic diagram showing an exploded structure of a power battery in the SOH monitoring system for a power battery according to the second embodiment of the present utility model.
Fig. 5 is a schematic top view of the power cell of fig. 4.
FIG. 6 is a schematic view showing a sectional structure in the direction VI-VI in FIG. 5.
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.
The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.
Moreover, the terms "first," "second," "third," and the like, are used merely to distinguish between similar elements and do not indicate or imply a relative importance or a particular order.
Furthermore, the terms "comprise," "include," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that elements are listed and may include other elements not expressly listed.
The utility model provides a power battery SOH monitoring system and a vehicle with the same, wherein the power battery can monitor SOH (state of health) of the power battery more easily through expansion force of the power battery when the vehicle runs.
Fig. 1 is a system block diagram of a SOH monitoring system for a power battery according to a first embodiment of the present utility model, fig. 2 is an exploded view of the power battery according to the first embodiment of the present utility model, and fig. 3 is a view of the membrane pressure sensor according to the first embodiment of the present utility model. As shown in fig. 1 to 3, the SOH monitoring system for a power battery according to the first embodiment of the present utility model includes a battery pack 10 and a control unit 20, wherein the battery pack 10 includes an expansion force collector 11 and a plurality of battery cells 12, the plurality of battery cells 12 are sequentially arranged, the expansion force collector 11 is disposed in the battery pack 10 and contacts with the battery cells 12 in the battery pack 10, and the expansion force collector 11 is configured to collect expansion force generated by expansion of the battery cells 12 and is electrically connected with the control unit 20 to transmit the expansion force information to the control unit 20. The control unit 20 is used for obtaining SOH data of the power battery according to the expansion force information of the battery cells 12.
In the present embodiment, the expansion force collector 11 is directly integrated in the battery pack 10, that is, the battery cell 12 and the expansion force collector 11 are tightly attached and fixed by the battery pack 10 itself. The expansion force of the battery cells 12 is directly collected in the battery pack 10, and because the battery cells 12 are sequentially arranged in the power battery, in the same battery pack 10, the expansion force generated by the expansion of one battery cell 12 and the expansion of the battery cells 12 can be transmitted to the expansion force collector 11, the expansion force collected by the expansion force collector 11 reflects the comprehensive force generated by the expansion of the battery cells 12, and the SOH (state of health) of the power battery can be easily monitored through the expansion force of the power battery when the vehicle runs.
Further, in the present embodiment, the battery pack 10 may be a module-level battery pack 10, and the battery pack 10 includes a plurality of battery modules (only one of which is shown in fig. 2), each of which includes a battery cell formed by sequentially arranging a plurality of battery cells 12, and end plates 13 at both ends of the battery cell. The expansion force collector 11 is a film pressure sensor, which is disposed between two adjacent battery cells 12, or between the battery cells 12 and the end plate 13.
Because the thickness of the film pressure sensor is relatively thin, the film pressure sensor does not substantially change the size of the module-level power electricity and other components, and the other components of the battery pack 10 do not need to be changed when the film pressure sensor is applied to a real vehicle.
With continued reference to fig. 2, in the present embodiment, a plurality of reinforcing ribs 131 are disposed on a side of the end plate 13 facing the battery cells 12, and heights of the plurality of reinforcing ribs 131 are equal, that is, one ends of the plurality of reinforcing ribs 131 facing the battery cells 12 are located on the same plane, and the battery cells 12 adjacent to the end plate 13 are disposed close to the end plate 13. This can enable the film pressure sensor to more accurately detect the expansion force of the battery cell 12 due to expansion.
Further, the signal line for transmitting the expansion force collector 11 is electrically connected to the control unit 20 through the original harness interface 15 on the battery pack 10, such as the voltage and temperature collection harness interface of the battery module or the FPC harness interface. That is, it does not require any layout design for the signal lines of the film pressure sensor.
Further, referring to fig. 3, the film pressure sensor includes a film layer 111 and a supporting strip 112 disposed on the film layer 111, where the supporting strip 112 includes a first supporting strip 1121 extending along a first direction and a second supporting strip 1122 extending along a second direction, and the first supporting strip 1121 and the second supporting strip 1122 are disposed to intersect. By the design of the support bar 112, support can be provided for the entire membrane pressure sensor.
Fig. 4 is an exploded view of a power battery in the SOH monitoring system for a power battery according to the second embodiment of the present utility model, fig. 5 is a schematic top view of the power battery in fig. 4, and fig. 6 is a schematic cross-sectional view of the power battery in VI-VI direction in fig. 5. As shown in fig. 4 to 6, the SOH monitoring system for a power battery according to the second embodiment of the present utility model is substantially the same as that of the first embodiment, and is different in that in this embodiment, the battery pack 10 may be a CTP (Cell to Pack) battery pack, and the battery pack 10 includes a battery cell formed by sequentially arranging a plurality of battery cells 12 and a frame 15 for carrying the battery cell. The expansion force collector 11 comprises a collector body 113 and a collecting end 114, wherein the collector body 113 is embedded into the frame 15, and the collecting end 114 extends out of the frame 15 and is in contact with the battery cell 12.
The frame 15 includes a longitudinal beam 151 extending along the arrangement direction of a plurality of battery cells 12 in the same cell, and a cross beam 152 perpendicular to the longitudinal beam 151, where the longitudinal beam 151 and the cross beam 152 intersect to form a containing space 153, the cell is disposed in the containing space 153, the collector body 113 is embedded in the cross beam 151, and the collecting end 114 extends out of the frame 15.
Further, a plurality of accommodating spaces 153 are disposed in the frame 15, and each accommodating space 153 is provided with a battery cell and an expansion force collector 11.
That is, in the present embodiment, the expansion force collector 11 is no longer a film pressure sensor, nor is it disposed between two adjacent cells 12, or between a cell 12 and the end plate 13, which is a mechanical pressure sensor, and is embedded in the cross beam 152. The above structure can directly measure the expansion force of the battery cells 12 in the CTP single area, that is, each accommodating space 153, without occupying the whole space of the arrangement of the battery cells.
Further, in the present embodiment, the expansion force collector 11 may be a strain type pressure sensor.
In summary, in the present utility model, the expansion force collector 11 is directly integrated into the battery pack 10, that is, the battery pack 10 itself is used to fix the battery cells 12 and the expansion force collector 11. The expansion force of the battery cells 12 is directly collected in the battery pack 10, and because the battery cells 12 are sequentially arranged in the power battery, in the same battery pack 10, the expansion force generated by the expansion of one battery cell 12 and the expansion of the battery cells 12 can be transmitted to the expansion force collector 11, the expansion force collected by the expansion force collector 11 reflects the comprehensive force generated by the expansion of the battery cells 12, and the SOH (state of health) of the power battery can be easily monitored through the expansion force of the power battery when the vehicle runs.
The utility model also provides a vehicle comprising the SOH monitoring system of the power battery, and other technical features of the vehicle are referred to in the prior art and are not repeated herein.
The present utility model is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present utility model can be made by those skilled in the art without departing from the scope of the present utility model.
Claims (10)
1. A power cell SOH monitoring system, characterized by: including battery package and control unit, the battery package includes expansion force collector and a plurality of battery monomer, and is a plurality of the battery monomer is laid in proper order, expansion force collector set up in the battery package and with the battery monomer contacts, expansion force collector be used for gathering the battery monomer because of the expansion and the expansion force that produces, and with the control unit electrical property links to each other, in order to transmit the expansion force information that gathers to in the control unit, the control unit is according to the battery monomer expansion force information obtains power battery's SOH data.
2. The power cell SOH monitoring system of claim 1, wherein: the battery pack is a module-level battery pack, the battery pack comprises a plurality of battery modules, each battery module comprises a battery cell formed by sequentially arranging a plurality of battery monomers, end plates positioned at two ends of the battery cell, the expansion force collector is a film pressure sensor, and the film pressure sensor is arranged between two adjacent battery monomers or between the battery monomers and the end plates.
3. The power cell SOH monitoring system according to claim 2, characterized in that: the end plate is provided with many strengthening ribs towards the free one side of battery, and is many the height homogeneous phase of strengthening rib is the same, and is many the strengthening rib is towards the free one end of battery all is located the coplanar.
4. The power cell SOH monitoring system according to claim 2, characterized in that: the film pressure sensor comprises a film layer and supporting strips arranged on the film layer, wherein the supporting strips comprise first supporting strips extending along a first direction and second supporting strips extending along a second direction, and the first supporting strips and the second supporting strips are intersected.
5. The power cell SOH monitoring system of claim 1, wherein: the battery pack is a CTP battery pack, the battery pack comprises a plurality of battery cells which are sequentially distributed to form an electric core and a frame for bearing the electric core, the expansion force collector comprises a collector body and a collecting end head, the collector body is embedded into the frame, and the collecting end head extends out of the frame and contacts with the battery cells.
6. The power cell SOH monitoring system of claim 5, wherein: the frame includes along the same a plurality of in the electric core the longeron that the direction was arranged to battery monomer extends, and with longeron mutually perpendicular's crossbeam, the longeron with the crossbeam is crossing to form the accommodation space, the electric core set up in the accommodation space, the collector body is buried in the crossbeam, the collection end stretches out outside the frame.
7. The power cell SOH monitoring system of claim 5, wherein: the frame is internally provided with a plurality of accommodating spaces, and each accommodating space is internally provided with the battery cell and the expansion force collector.
8. The power cell SOH monitoring system of claim 5, wherein: the expansion force collector is a strain type pressure sensor.
9. The power cell SOH monitoring system of claim 1, wherein: the signal line for transmitting the expansion force collector is electrically connected with the control unit through a wire harness interface on the battery pack.
10. A vehicle, characterized in that: comprising a power cell SOH monitoring system according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322333566.3U CN220262613U (en) | 2023-08-29 | 2023-08-29 | SOH monitoring system of power battery and vehicle with SOH monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322333566.3U CN220262613U (en) | 2023-08-29 | 2023-08-29 | SOH monitoring system of power battery and vehicle with SOH monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN220262613U true CN220262613U (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322333566.3U Active CN220262613U (en) | 2023-08-29 | 2023-08-29 | SOH monitoring system of power battery and vehicle with SOH monitoring system |
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| Country | Link |
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| CN (1) | CN220262613U (en) |
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- 2023-08-29 CN CN202322333566.3U patent/CN220262613U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Power battery SOH monitoring system and vehicles with it Granted publication date: 20231229 Pledgee: Tongxiang Science and Technology Entrepreneurship Service Center Co.,Ltd. Pledgor: United New Energy Automobile Co.,Ltd. Registration number: Y2024330000709 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |