CN114812373A - Battery pack deformation array monitoring system and method - Google Patents
Battery pack deformation array monitoring system and method Download PDFInfo
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- CN114812373A CN114812373A CN202210224042.8A CN202210224042A CN114812373A CN 114812373 A CN114812373 A CN 114812373A CN 202210224042 A CN202210224042 A CN 202210224042A CN 114812373 A CN114812373 A CN 114812373A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000003491 array Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 17
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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Abstract
The invention provides a battery pack deformation array monitoring system and a battery pack deformation array monitoring method, wherein the system comprises a strain gauge group which is arranged on the surface of a monitored battery and is used for acquiring a deformation signal of a battery pack; the channel selection module is used for receiving the selection signal and acquiring a deformation signal input by the corresponding strain gauge; the acquisition loop is used for receiving the deformation signal and converting the deformation signal into a deformation digital signal; and the controller is used for sending the selection signal and receiving the deformation digital signal. According to the invention, the mechanical deformation of a group of battery cores is monitored by scanning all the battery cores through one acquisition channel array, so that the cost of a data acquisition device for detecting the battery deformation is greatly reduced, and more-dimensional data support is provided for large-scale deployment of battery safety monitoring.
Description
Technical Field
The invention relates to the technical field of battery deformation detection, in particular to a battery pack deformation array monitoring system and method.
Background
The lithium battery plays an increasingly important role in the current production and life, however, the property of lithium element is very active, the safety problem of the lithium battery is always concerned by people, the failure process of the lithium battery is usually accompanied by the accumulation of internal gas, so that the pressure in the battery is increased, and the shape of the lithium battery also can deform to a certain extent along with the increase of the air pressure, so that the health state of the lithium battery can be inferred from the change of the shape of the battery.
It is common practice to use a strain gauge sensor mounted on the battery housing, and when the housing deforms, the strain gauge sensor will change accordingly, which can be collected by using a data collection device, so as to obtain the deformation of the battery. Refer to chinese patent publication No. CN108548517A for a battery deformation detection device and method, a terminal, the battery deformation detection device includes a deformation detection module and a control module, the control module is electrically connected with the deformation detection module, the deformation detection module is used for deformation detection of the battery, the control module is used for judging whether the battery is deformed abnormally according to the deformation detection result of the deformation detection module, based on the settings of the deformation detection module and the control module, the battery deformation detection device has the functions of deformation detection and deformation abnormality judgment of the battery, and can perform safety detection on the battery.
The data acquisition device of the strain gauge sensor is high in cost, a group of batteries or energy storage power stations comprise dozens or even tens of thousands of electric cores, and the cost of one acquisition device configured for each strain gauge is very high, so that the large-scale application of the strain gauge sensor in the field of battery deformation monitoring is limited.
Disclosure of Invention
The invention provides a battery pack deformation array monitoring system and a battery pack deformation array monitoring method aiming at the problem that battery deformation cannot be effectively monitored due to high cost of a battery pack or an energy storage power station which needs to deploy battery cells in a large scale.
In order to realize the purpose, the following technical scheme is provided:
a battery deformation array monitoring system, comprising:
the strain gauge group is arranged on the surface of the monitored battery and used for acquiring a deformation signal of the battery pack;
the channel selection module is used for receiving the selection signal and acquiring a deformation signal input by the corresponding strain gauge;
the acquisition loop is used for receiving the deformation signal and converting the deformation signal into a deformation digital signal;
and the controller is used for sending the selection signal and receiving the deformation digital signal.
The strain gauge groups form a strain gauge detection array, strain gauges corresponding to each group of battery packs are known under the condition of large-scale deployment of the battery packs, the strain gauges of all the battery packs are uniformly selected through a channel selection module, deformation data of a certain group of battery packs are collected by using a collection loop after selection, and finally a controller is output, so that detection of 1 collection device corresponding to multiple groups of battery packs is realized, the number of the collection devices is greatly reduced compared with 1 collection device needed by 1 battery pack, the cost of a data collection device for detecting battery deformation is greatly reduced, and more-dimensional data support is provided for large-scale deployment of battery safety monitoring.
Preferably, the strain gauge groups are topologically arranged in m rows and n columns to form a strain gauge array, one end of each strain gauge in each column is connected together to generate m row wirings, and the other end of each strain gauge in each row is connected together to generate n column wirings.
The invention aims to carry out gating in a mode of m rows and n columns, which is equivalent to positioning each strain gauge in a coordinate mode, and can accurately select the required strain gauge only by knowing row addresses and column addresses, thereby having the advantages of convenient selection, high efficiency and simple operation.
Preferably, the channel selection module includes an m-to-1 row selection gate and an n-to-1 column selection gate, the m row wires are connected to the m-to-1 row selection gate, the n column wires are connected to the n-to-1 column selection gate, and the channel selection module is further provided with a row address receiving end, a column address receiving end, a row signal output end and a column signal output end.
Preferably, the selection signal includes a row address and a column address, the row address receiving end receives the row address and then connects to the strain gauge of the corresponding row, the column address receiving end receives the column address and then connects to the strain gauge of the corresponding column, the deformation signal includes a row deformation signal and a column deformation signal, the row deformation signal is output through the row signal output end, and the column deformation signal is output through the column signal output end.
Preferably, the acquisition loop comprises a bridge circuit, a signal conditioning circuit and an analog-to-digital conversion circuit which are connected in sequence, and the acquired deformation signal is processed and then output to the controller through an output end of the analog-to-digital conversion circuit.
A battery pack deformation array monitoring method adopts the battery pack deformation array monitoring system and comprises the following steps:
s1, the controller sends a selection signal to the channel selection module according to the position of the strain gauge corresponding to the battery pack to be detected;
s2, the channel selection module switches on the corresponding strain gauge according to the selection signal and obtains the deformation signal input by the strain gauge;
and S3, the acquisition loop receives the deformation signal, converts the deformation signal into a deformation digital signal, and finally feeds the deformation digital signal back to the controller.
The invention has the beneficial effects that: the invention realizes the detection of 1 acquisition device corresponding to a plurality of groups of battery packs, and greatly reduces the number of the acquisition devices compared with 1 acquisition device needed by 1 battery pack, thereby greatly reducing the cost of a data acquisition device for detecting the deformation of the battery, and providing more dimensional data support for the large-scale deployment of the safety monitoring of the battery.
Drawings
FIG. 1 is a system configuration diagram of the embodiment;
FIG. 2 is a schematic diagram of a channel selection module connection of an embodiment;
FIG. 3 is a schematic diagram of an embodiment acquisition circuit.
Detailed Description
Example (b):
this embodiment proposes a group battery deformation array monitoring system, includes: the strain gauge group is arranged on the surface of the monitored battery and used for acquiring a deformation signal of the battery pack; the channel selection module is used for receiving the selection signal and acquiring a deformation signal input by the corresponding strain gauge; the acquisition loop is used for receiving the deformation signal and converting the deformation signal into a deformation digital signal; and the controller is used for sending the selection signal and receiving the deformation digital signal.
Referring to fig. 1, the present embodiment is divided into four modules: the device comprises a strain gauge array, a channel selection module, an acquisition loop and a controller. The strain gauge groups arrange an array of strain gauges of combined stroke in a manner that is mounted on the surface of the cell being monitored. The channel selection module is used for scanning the strain gauges in the strain gauge array one by one, the scanned strain gauge is gated to the acquisition loop, and the scanning mode of the acquisition loop is controlled by the controller. The acquisition circuit comprises a strain gauge acquisition circuit with one channel, and can convert an accessed strain gauge signal into a digital quantity to be sent to the controller. The controller controls the channel selection of the channel selection module through the column address Caddr and the row address Raddr, and receives Data _ out from the acquisition loop through the digital interface.
Fig. 2 shows a schematic diagram of a strain gauge array and a channel selection module, wherein strain gauges are topologically arranged in m rows and n columns, and S (m, n) refers to the strain gauge in the nth column of the mth row. The left ends (or right ends) of the strain gages of each column are connected together and the right ends (or left ends) of each row are connected together, thus creating m row lines and n column lines.
The m row lines and the n column lines are connected to a channel selection module, and the channel selection module comprises two groups of one-out-of-multiple gates. One set is the m-to-1-select gate for row selection and the other set is the n-to-1-select gate for column selection. The channel selection module receives the row address Raddr and the column address Caddr sent by the control module, and outputs the strain gauges of the corresponding row and column to the row output Rout and the column output Cout.
The schematic diagram of the acquisition loop is shown in fig. 3, and the row output Rout and the column output Cout of the selected strain gauge are connected to the acquisition loop. The acquisition loop comprises a bridge circuit, a signal conditioning circuit, an analog-to-digital conversion circuit and the like required by strain gauge acquisition. The selected strain gauge signals can be directly collected and converted into digital signals to be sent to the controller to complete collection.
The embodiment further provides a battery pack deformation array monitoring method, and the battery pack deformation array monitoring system adopting the battery pack deformation array monitoring method comprises the following steps:
s1, the controller sends a selection signal to the channel selection module according to the position of the strain gauge corresponding to the battery pack to be detected;
s2, the channel selection module switches on the corresponding strain gauge according to the selection signal and obtains the deformation signal input by the strain gauge;
and S3, the acquisition loop receives the deformation signal, converts the deformation signal into a deformation digital signal, and finally feeds the deformation digital signal back to the controller.
In conclusion, the invention has the following advantages: the detection that 1 acquisition equipment corresponds multiunit group battery is realized, 1 acquisition equipment is needed for 1 group battery, greatly reduced acquisition equipment's quantity to reduce the data acquisition device cost that detects battery deformation by a wide margin, provide the data support of more dimensions for battery safety monitoring deploys on a large scale.
Claims (6)
1. A battery deformation array monitoring system is characterized by comprising:
the strain gauge group is arranged on the surface of the monitored battery and used for acquiring a deformation signal of the battery pack;
the channel selection module is used for receiving the selection signal and acquiring a deformation signal input by the corresponding strain gauge;
the acquisition loop is used for receiving the deformation signal and converting the deformation signal into a deformation digital signal;
and the controller is used for sending the selection signal and receiving the deformation digital signal.
2. A system for monitoring deformation arrays of battery packs as claimed in claim 1, wherein the strain gauge groups are topologically arranged in m rows and n columns to form a strain gauge array, wherein one end of each column of strain gauges is connected together to form m row connections, and the other end of each row of strain gauges is connected together to form n column connections.
3. The battery pack deformation array monitoring system according to claim 2, wherein the channel selection module comprises m-to-1 row selection gates and n-to-1 column selection gates, the m row wires are connected to the m-to-1 row selection gates, the n column wires are connected to the n-to-1 column selection gates, and the channel selection module is further provided with a row address receiving end, a column address receiving end, a row signal output end and a column signal output end.
4. The battery pack deformation array monitoring system according to claim 3, wherein the selection signal comprises a row address and a column address, the row address receiving terminal receives the row address and then switches on the strain gauge of the corresponding row, the column address receiving terminal receives the column address and then switches on the strain gauge of the corresponding column, the deformation signal comprises a row deformation signal and a column deformation signal, the row deformation signal is output through a row signal output terminal, and the column deformation signal is output through a column signal output terminal.
5. The battery pack deformation array monitoring system of claim 1, wherein the acquisition loop comprises a bridge circuit, a signal conditioning circuit and an analog-to-digital conversion circuit which are connected in sequence, and the acquired deformation signals are processed and then output to the controller through an output end of the analog-to-digital conversion circuit.
6. A battery deformation array monitoring method, which adopts the battery deformation array monitoring system of claim 1, and is characterized by comprising the following steps:
s1, the controller sends a selection signal to the channel selection module according to the position of the strain gauge corresponding to the battery pack to be detected;
s2, the channel selection module switches on the corresponding strain gauge according to the selection signal and obtains the deformation signal input by the strain gauge;
and S3, the acquisition loop receives the deformation signal, converts the deformation signal into a deformation digital signal, and finally feeds the deformation digital signal back to the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210224042.8A CN114812373A (en) | 2022-03-09 | 2022-03-09 | Battery pack deformation array monitoring system and method |
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| CN202210224042.8A CN114812373A (en) | 2022-03-09 | 2022-03-09 | Battery pack deformation array monitoring system and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236260A (en) * | 2008-03-06 | 2008-08-06 | 中国农业科学院农田灌溉研究所 | Evaporation based irrigation prealarming device and its operation method |
| CN204516809U (en) * | 2015-01-28 | 2015-07-29 | 合肥国轩高科动力能源股份公司 | A kind of quadrate lithium battery modular structure |
| WO2016150747A1 (en) * | 2015-03-23 | 2016-09-29 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method for determining at least one safety status of an electrochemical lithium battery by means of one or more strain gauges |
| CN108548517A (en) * | 2018-03-29 | 2018-09-18 | 维沃移动通信有限公司 | A kind of battery deformation detecting device and method, a kind of terminal |
| US20200092501A1 (en) * | 2016-12-27 | 2020-03-19 | Shanghai Ic R&D Center Co., Ltd. | Full-frame image sensor system |
| CN113375822A (en) * | 2021-05-31 | 2021-09-10 | 盐城工学院 | Temperature detection system and temperature detection method for lithium battery pack |
-
2022
- 2022-03-09 CN CN202210224042.8A patent/CN114812373A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236260A (en) * | 2008-03-06 | 2008-08-06 | 中国农业科学院农田灌溉研究所 | Evaporation based irrigation prealarming device and its operation method |
| CN204516809U (en) * | 2015-01-28 | 2015-07-29 | 合肥国轩高科动力能源股份公司 | A kind of quadrate lithium battery modular structure |
| WO2016150747A1 (en) * | 2015-03-23 | 2016-09-29 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method for determining at least one safety status of an electrochemical lithium battery by means of one or more strain gauges |
| US20200092501A1 (en) * | 2016-12-27 | 2020-03-19 | Shanghai Ic R&D Center Co., Ltd. | Full-frame image sensor system |
| CN108548517A (en) * | 2018-03-29 | 2018-09-18 | 维沃移动通信有限公司 | A kind of battery deformation detecting device and method, a kind of terminal |
| CN113375822A (en) * | 2021-05-31 | 2021-09-10 | 盐城工学院 | Temperature detection system and temperature detection method for lithium battery pack |
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