GB2509566A - Overcharge protection circuit with redundant voltage detector - Google Patents
Overcharge protection circuit with redundant voltage detector Download PDFInfo
- Publication number
- GB2509566A GB2509566A GB1316139.3A GB201316139A GB2509566A GB 2509566 A GB2509566 A GB 2509566A GB 201316139 A GB201316139 A GB 201316139A GB 2509566 A GB2509566 A GB 2509566A
- Authority
- GB
- United Kingdom
- Prior art keywords
- terminal
- voltage
- electrically connected
- voltage detector
- secondary battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
A secondary battery 20 with an overcharge protection circuit is provided with two voltage detectors 30, 60 electrically in parallel to each of the secondary batteries 20, and a status detecting unit 70 is used to detect the status of the first secondary battery 20. When detecting that the first voltage detector 30 is not working, the status detecting unit 70 will make the second voltage detector 60 start detecting the voltage of the first secondary battery 20, so as to prevent the voltage of the first secondary battery from continuously going up and damaging the secondary battery.
Description
SECONDARY BATTERY WITH AN OVERCHARGE PROTECTION
CIRCUIT
BACKGROUND OF THE P4VENTTON
Field of the Invention
The present invention relates to a secondary battery, and more particularly to a secondary battery with an overcharge protection circuit.
Description of the Prior Art
If the batteries which are connected in series have different rated power, the power difference between the battery with the highest rated power and the battery with the lowest rated power should be controlled within 10%, otherwise, the BMS (battery management system) will be damaged, and the charging process will be ceased. Secondary batteries have been widely used in industrial field due to the fact that the second batteries have no memory etl'ect. However, all secondary batteries have a conimon disadvantage: in case of overcharge, the terminal voltage of the secondary batteries will constantly increase, resulting in an unrecoverable danmge or even explosion.
As shown in Fig. 1, plural secondary batteries 11 are electrically in series with the positive terminals 111 connected to the negative terniiinals 112, and each of the secondary batteries 11 is connected in parallel with an overcharge circuit 12.
When the voltage at two ends of any secondary batteries 11 is larger than or equal to a threshold value, the overcharge circuit 12 will start a self-discharging process to protect the secondary battery being charged.
However, the voltage detecting elements (not shown) in each of the overcharge circuits 12 have to keep detecting the voltage during the charging process, therefore are very likely to be broken.
Besides, once the voltage detecting element of the overcharge circuit 12 is broken or out of order, it won't be able to protect the corresponding secondary batteries 11 from being overcharged anymore.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a secondary battery with an overcharge protection circuit, which includes two voltage detectors electrically in parallel to each of the secondary batteries, and a status detecting unit is used to detect the status of the first secondary battery. When detecting that the first voltage detector is not working, the status detecting unit will make tile second voltage detector start detecting the voltage of the first secondary battery so as to prevent the voltage of the first secondary battery from continuously going up and damaging the secondary battery.
To achieve the above objective, a secondary battery with an overcharge protection circuit in accordance with the present invention comprises: the secondary battery includes a positive terminal, a negative terminal and a terminal voltage between the positive and negative terminals; a first voltage detector includes a first detecting end electrically connected to the positive terminal, a second detecting end electrically connected to the negative terminal, and a first signal output portion, when the first voltage detector detects that the terminal voltage is larger than a no-load voltage, the first signal output portion will send out a start signal to start a charging process, and when the first voltage detector detects that the terminal voltage is smaller than or equal to a charging voltage, the first signal output portion will send out a stop signal to stop the charging process, wherein the no-load voltage is larger than the charging voltage; a semiconductor switch including a first terminal, a second terminal electrically connected to the negative terminal, and a control ternñnal which is electrically connected to the first signal output portion and receives a signal sent from the first signal output portion to control the first and second terminals to be connected or disconnected from each other, when the semiconductor switch is in normal conditions or when the control terminal receives the stop signal, the first terminal will be disconnected from the second terminal, and when the control terminal receives the start signal, the first terminal will be connected to the second terminal; a balance resistor including a first resistance end electrically connected to the positive terminal, and a second resistance end electrically connected to the first tenninal.
The secondary battery with the overcharge protection circuit is characterized hi that: the second voltage detector includes a third detecting end electrically connected to the positive terminal, a fourth detecting end electrically connected to the negative terminal, and a second signal output portion electrically connected to the control terminal, when the second voltage detector detects that the terminal voltage is larger than a no-load voltage, the second signal output portion will send out the start signal to start the charging process, and when the second voltage detector detects that the terminal voltage is smaller than or equal to the charging voltage, the second signal output portion will send out the stop signal to stop the charging process; a status detecting unit is electrically connected between the positive terminal and the third detecting end or between the negative terminal and the fourth detecting end to detect the status of the first voltage detector, when the status detecting unit detects that the first voltage detector stops working, the status detecting unit will be switched into conduction to make the second voltage detector start working, and when the status detecting unit detects that the first voltage detector is working, the status detecting unit will be switched out of conduction to make the second voltage detector stop working.
Preferably, the secondary battery includes a plurality of parallel-connected battery cells.
Preferably, the status detecting unit includes a first end electrically connected to the positive terminal, and a second end electrically connected to the third detecting end.
Preferably, the status detecting unit includes a first end electrically connected to the negative terminal, and a second end electrically connected to the fourth detectiiig end.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 shows a conventional secondary battery with an overcharge protection circuit; Fig. 2 shows a secondary battery with an overcharge protection circuit in accordance with a first embodiment of the present invention; Fig. 3 shows that two secondary batteries are connected in series and each is connected with an overcharge protection circuit in accordance with tile first embodiment of the present invention; Fig. 4 shows a secondary battery with an overcharge protection circuit iii accordance with a second embodiment of the present invention; Fig. 5 shows that two secondary batteries are connected in series and each is connected with an overcharge protection circuit hi accordance with the second embodiment of the present invention; Fig. 6 shows a secondary battery with an overcharge protection circuit in accordance with a third embodiment of the present invention; and Fig. 7 shows that two secondary batteries are connected in series and each is connected with an overcharge protection circuit in accordance with the third embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustration only, the preferred embodiments in accordance with the present invention.
Referring to Figs. 2, a secondary battery with an overcharge protection circuit in accordance with a first embodiment of the present invention comprises: a secondary battery 20, and a first voltage detector 30, a semiconductor switch 40, a balance resistor 50, a second voltage detector 60, and a status detecting unit 70 which are arranged between a positive terminal 21 and a negative terminal 22 of the secondary battery 20.
The secondary battery 20 is a secondary battery which can be recharged and discharged repeatedly and includes the positive terminal 21, the negative terminal 22 and a terminal voltage between the positive and negative terminals 21, 22.
The first voltage detector 30 includes a first detecting end 31 electrically connected to the positive ternñnal 21, a second detecting end 32 electrically connected to the negative terminal 22, and a first signal output portion 33. When the first voltage detector 30 detects that the terminal voltage lB is larger than a no-load voltage VD, the first signal output portion 33 will send out a start signal to start the charging process, and when the first voltage detector 30 detects that the terminal voltage VB is smaller than or equal to a charging voltage VC, the first signal output portion 33 will send out a stop signal to stop the charging process, wherein the no-load voltage VD is larger than the charging voltage VC.
The semiconductor switch 40 hi this embodiment is a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) switch and comprises: a first terminal 41, a second terminal 42 electrically connected to the negative terminal 22, and a control terminal 43 which is electrically connected to the first signal output portion 33 and receives the signal sent from the first signal output portion 33 to control the first and second terminals 41, 42 to be connected or disconnected from each other. When the semiconductor switch 40 is in normal conditions or when the control terminal 43 receives a stop signal, the first terminal 41 will be disconnected from the second tenninal 42, and when the control terminal 43 receives a start signal, the first tenninal 41 will be connected to the second terminal 42.
The balance resistor 50 has a first resistance end 51 electrically connected to the positive terminal 2!, and a second resistance end 52 electrically connected to the first terminal 41.
The first voltage detector 30, the semiconductor switch 40 and the balance resistor 50 are all conventional devices, therefore, further descriptions would be omitted.
The second voltage detector 60 includes a third detecting end 61 electrically connected to the positive terminal 21, a fourth detecting end 62 electrically connected to the negative termina! 22, and a second signal output portion 63 electrically connected to tile control terminal 43. When the second voltage detector detects that the terminal voltage VB is larger than a no-load voltage VD, the second signal output portion 63 will send out a start signal to start the charging process, and when the second voltage detector 60 detects that the terniinal voltage VB is smaller than or equal to a charging voltage VC. the second signal output portion 63 will send out a stop signal to stop the charging process.
The status detecting unit 70 is electrically connected between the positive terminal 21 and the third detecting end 61 to detect the status of the first voltage detector 30 and includes a first end 71 electrically connected to the positive terminal 21, and a second end 72 electrically connected to the third detecting end 61. When the status detecting unit 70 detects that the first voltage detector 30 stops working, the status detecting unit 70 will be switched into conduction to make the second voltage detector 60 start working, and when the status detecting unit 70 detects that the first voltage detector 30 is working, the status detecting unit 70 will be switched out of conduction to make the second voltage detector 60 stop working.
The above are the structural relations of the main parts of tile present invention, for a better understanding of the operation of the present invention, reference should be made to Fig. 3, wherein a first secondary battery 20A and a second secondary battery 20B are connected in series and then charged with a CC-CV charger 80. The power of the first secondary battery 20A is 50% less than that of the second secondary battery 20B, for instance, the power of the first secondary battery 20A is SOAh, and the power of the second secondary battery 20B is lOOAh.
During the charging process, if the Soc of the secondary battery which is relatively low hi power level reaches 100% before other secondary batteries, the extra power can be consumed by the balance resistor 50, so as to prevent the voltage of the first secondary battery 20A from continuously going up and damaging the secondary battery, thus providing series connection charging protection.
It is to be noted that to the first secondary battery 20A are electrically connected with the parallel-connected first and second voltage detectors 30A and 60A, and the status detecting unit 70A serves to detect the status of the first voltage detector 30A. When detecting that the first voltage detector 30A is not working, the status detecting unit 70A will make the second voltage detector 60A start detecting the voltage of the first secondary battery 20A, so as to prevent the voltage of the first secondary battery 20A from continuously going up and damaging the secondary battery. Therefore, the present invention is capable of providing charging protection
S
even when the first voltage detector 30A is broken and fails to provide charging protection for the first secondary battery 20A.
Similarly, to tile second secondary battery 20B are electrically connected with the parallel-connected first and second voltage detectors 30B and 60B, and the status detecting unit 70B is used to detect the status of the first voltage detector 30B.
When detecting that the first voltage detector 30B is not working, the status detecting unit 70B will make the second voltage detector 60B start detecting the voltage of the second secondary battery 20B, so as to prevent the voltage of the second secondary battery 20B from continuously going up during charging process.
Therefore, the present invention is capable of providing charging protection even when the first voltage detector 30A is broken and fails to provide charging protection for the first secondary battery 20A.
Referring then to Fig. 4, a secondary battery with an overcharge protection circuit in accordance with a second embodiment of the present invention also comprises: a secondary battery 20, and a first voltage detector 30, a seniiconductor switch 40, a balance resistor 50. a second voltage detector 60, and a status detecting unit 70 and is similar to the first embodiment, except that: the status detecting unit is electrically connected between the negative terminal 22 of the secondary battery 20 and the fourth detecting end 62 of the second voltage detector 60 and has the first end 71 electrically connected to the negative terminal 22 and the second end 72 electrically connected to the fourth detecting end 62.
Similarly, as shown in Fig. 5, a first secondary battery 20A and a second secondary battery 20B which have different powers are connected in series. The status detecting unit 70A is also electrically coirnected between the negative tenninal 22A of the first secondary battery 20A and the fourth detecting end 62A of the second voltage detector 60A and has the first end 71 A electrically connected to tile negative terminal 22A and the second end 72A electrically connected to the fourth detecting end 62A. The another status detecting unit 70B is electrically connected between the negative terminal 22B of the second secondary battery 20B and the fourth detecting end 62B of the second voltage detector 60B and has the first end 71 B electrically connected to the negative tenninal 22B and the second end 72B electrically connected to the fourth detecting end 62B.
Referring then to Fig. 6, a secondary battery with an overcharge protection circuit in accordance with a third embodiment of the present invention also comprises: a secondary battery 20, and a first voltage detector 30, a semiconductor switch 40, a balance resistor 50, a second voltage detector 60, and a status detecting unit 70 and is similar to the first embodiment, except that: the secondary battery 20 includes a plurality of parallel-connected battery cells 201. As shown hi Fig. 7, the first secondary battery 20A includes a plurality of parallel-connected battery cells 201A, and the second secondary battery 20B includes a plurality of parallel-connected battery cells 201 B. While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Claims (5)
- WHAT IS CLAIMED 15: 1. A secondary battery with an overcharge protection circuit, comprising: the secondary battery including a positive terminal, a negative terminal and a terminal voltage between the positive and negative terminals; a first voltage detector including a first detecting end electrically connected to the positive terminal, a second detecting end electrically connected to the negative terminal, and a first signal output portion, when the first voltage detector detects that the terminal voltage is larger than a no-load voltage, the first signal output portion will send out a start signal to start a charging process, and when the first voltage detector detects that the terminal voltage is smaller than or equal to a charging voltage, tile first signal output portion will send out a stop signal to stop the charging process, wherein the no-load voltage is larger than the charging voltage; a semiconductor switch including a first terminal, a second terminal electrically connected to the negative terminal, and a control terniinal which is electrically connected to the first signal output portion and receives a signal sent from the first signal output portion to control the first and second terminals to be connected or disconnected from each other, when the semiconductor switch is in nonnal conditions or when the control terminal receives the stop signal, the first terminal will be disconnected from the second terminal, and when the control tenninal receives the start signal, the first terminal will be connected to the second terminal; a balance resistor including a first resistance end electrically connected to the positive terminal, and a second resistance end electrically connected to the first tenninal; the secondary battery with the overcharge protection circuit being characterized in that: the second voltage detector includes a third detecting end electrically connected to the positive terminal, a fourth detecting end electrically connected to the negative terminal, and a second signal output portion electrically connected to the control terminal, when the second voltage detector detects that the terminal voltage is larger than a no-load voltage, the second signal output portion will send out the start signal to start the charging process, and when the second voltage detector detects that the terminal voltage is smaller than or equal to the charging voltage, the second signal output portion will send out the stop signal to stop the charging process; a status detecting unit is electrically connected between the positive terminal and the third detecting end or between the negative terminal and the fourth detecting end to detect the status of the first voltage detector, when the status detecting unit detects that the first voltage detector stops working, the status detecting unit will be switched into conduction to make the second voltage detector start working, and when the status detecting unit detects that the first voltage detector is working, the status detecting unit will be switched out of conduction to make the second voltage detector stop working.
- 2. The secondary battery with an overcharge protection circuit as claimed in claim I, wherein the secondary battery includes a plurality of parallel-connected batter cells.
- 3. The secondary battery with an overcharge protection circuit as claimed in claim 1, wherein the status detecting unit includes a first end electrically connected to the positive terminal, and a second end electrically connected to the third detecting end.
- 4. The secondary battery with an overcharge protection circuit as claimed in claim 1, wherein the status detecting unit includes a first end electrically connected to the negative terminal, and a second end electrically connected to the fourth detecting end.
- 5. A secondary battery with an overcharge protection circuit substantially as hereinbefore described withy reference to and as shown in Figures 2 to 7 of the accompanying drawings.Amendments to the claims have been filed as follows WHAT IS CLAIMED IS: 1. A secondary battery assembly with an overcharge protection circuit, comprising: two serially connected secondary batteries with different levels, each including a positive terminal, a negative terminal and a terminal voltage between the positive and negative terminals; each of the secondary batteries including a first voltage detector, a semiconductor switch, a balance resistor, a second voltage detector and a status detecting unit; the first voltage detector including a first detecting end electrically SSU* connected to the positive terminal, a second detecting end electrically connected to * the negative terminal, and a first signal output portion, when the first voltage *.a.detector detects that the terminal voltage is larger than a no-load voltage, the fir st *". : signal output portion will send out a start signal to start a charging process, and when the first voltage detector detects that the terminal voltage is smaller than or equal to a charging voltage, the first signal output portion will send out a stop signal to stop the charging process, wherein the no-load voltage is larger than the charging voltage; the semiconductor switch including a first terminal, a second terminal electrically connected to the negative terminal, and a control terminal which is electrically connected to the first signal output portion and receives a signal sent from the first signal output portion to control the first and second terminals to be connected or disconnected from each other, when the semiconductor switch is in normal conditions or when the control terminal receives the stop signal, the first terminal will be disconnected from the second terminal, and when the control terminal receives the start signal, the first terminal will be connected to the second terminal; the balance resistor including a first resistance end electrically connected to the positive terminal, and a second resistance end electrically connected to the first terminal; the secondary battery with the overcharge protection circuit being characterized in that: the second voltage detector includes a third detecting end electrically connected to the positive terminal, a fourth detecting end electrically connected to the negative terminal, and a second signal output portion electrically connected to the control terminal, when the second voltage detector detects that the terminal *.....* voltage is larger than a no-load voltage, the second signal output portion will send * ** *.,: out the start signal to start the charging process, and when the second voltage *. : detector detects that the terminal voltage is smaller than or equal to the charging * voltage, the second signal output portion will send out the stop signal to stop the charging process; the status detecting unit is electrically connected between the positive terminal and the third detecting end or between the negative terminal and the fourth detecting end to detect the status of the first voltage detector, when the status detecting unit detects that the first voltage detector stops working, the status detecting unit will be switched into conduction to make the second voltage detector start working, and when the status detecting unit detects that the first voltage detector is working, the status detecting unit will be switched out of conduction to make the second voltage detector stop working.2. The secondary battery assembly with an overcharge protection circuit as claimed in claim 1, wherein the status detecting unit includes a first end electrically connected to the positive terminal, and a second end electrically connected to the third detecting end.3. The secondary battery assembly with an overcharge protection circuit as claimed in claim 1, wherein the status detecting unit includes a first end electrically connected to the negative terminal, and a second end electrically connected to the fourth detecting end.4. A secondary battery assembly with an overcharge protection circuit S...substantially as hereinbefore described with reference to and as shown in Figures 2 * to 7 of the accompanying drawings. * *. . * * . * .* SS * * * S S **
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB1300238.1A GB201300238D0 (en) | 2013-01-08 | 2013-01-08 | Litium battery connected in series with an overcharge protection device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201316139D0 GB201316139D0 (en) | 2013-10-23 |
| GB2509566A true GB2509566A (en) | 2014-07-09 |
| GB2509566B GB2509566B (en) | 2014-12-31 |
Family
ID=47748067
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB1300238.1A Ceased GB201300238D0 (en) | 2013-01-08 | 2013-01-08 | Litium battery connected in series with an overcharge protection device |
| GB1316139.3A Active GB2509566B (en) | 2013-01-08 | 2013-09-11 | A secondary battery assembly with an overcharge protection circuit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB1300238.1A Ceased GB201300238D0 (en) | 2013-01-08 | 2013-01-08 | Litium battery connected in series with an overcharge protection device |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB201300238D0 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863796A (en) * | 2017-10-30 | 2018-03-30 | 努比亚技术有限公司 | Battery electric quantity balancing control circuit, terminal and battery electric quantity balance control method |
| WO2023044216A1 (en) * | 2021-09-20 | 2023-03-23 | Atieva, Inc. | Dynamic sensor data collection |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882953A (en) * | 2015-05-29 | 2015-09-02 | 苏州工业职业技术学院 | Mobile phone charging control circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110156714A1 (en) * | 2009-12-24 | 2011-06-30 | Denso Corporation | Battery fault detection apparatus |
| US20110254502A1 (en) * | 2010-04-15 | 2011-10-20 | Larry James Yount | Fault-tolerant battery management system, circuits and methods |
| US20120200968A1 (en) * | 2011-02-07 | 2012-08-09 | George Altemose | Battery Charge Protection System |
-
2013
- 2013-01-08 GB GBGB1300238.1A patent/GB201300238D0/en not_active Ceased
- 2013-09-11 GB GB1316139.3A patent/GB2509566B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110156714A1 (en) * | 2009-12-24 | 2011-06-30 | Denso Corporation | Battery fault detection apparatus |
| US20110254502A1 (en) * | 2010-04-15 | 2011-10-20 | Larry James Yount | Fault-tolerant battery management system, circuits and methods |
| US20120200968A1 (en) * | 2011-02-07 | 2012-08-09 | George Altemose | Battery Charge Protection System |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863796A (en) * | 2017-10-30 | 2018-03-30 | 努比亚技术有限公司 | Battery electric quantity balancing control circuit, terminal and battery electric quantity balance control method |
| WO2023044216A1 (en) * | 2021-09-20 | 2023-03-23 | Atieva, Inc. | Dynamic sensor data collection |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2509566B (en) | 2014-12-31 |
| GB201316139D0 (en) | 2013-10-23 |
| GB201300238D0 (en) | 2013-02-20 |
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