CN202602333U - Lithium battery management circuit for automobile products - Google Patents
Lithium battery management circuit for automobile products Download PDFInfo
- Publication number
- CN202602333U CN202602333U CN 201220237389 CN201220237389U CN202602333U CN 202602333 U CN202602333 U CN 202602333U CN 201220237389 CN201220237389 CN 201220237389 CN 201220237389 U CN201220237389 U CN 201220237389U CN 202602333 U CN202602333 U CN 202602333U
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- China
- Prior art keywords
- lithium battery
- oxide
- semiconductor
- metal
- power supply
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a lithium battery management circuit for automobile products. The lithium battery management circuit comprises an external power supply, a lithium battery in electric connection with the external power supply, a mobile phone module in electric connection with the external power supply and the lithium battery and an alternative circuit in electric connection with an output end of the external power supply. By means of the design of the alternative circuit, the lithium battery management circuit for automobile products achieves management of a power supply path, reduces charging and discharging frequency of the lithium battery, so that service life of the lithium battery is prolonged, and the lithium battery management circuit is favorable for automobile information products which are inconvenient to dismount after installation.
Description
Technical field
The utility model belongs to automotive field, is specifically related to a kind of battery management circuit that is used for vehicle-mounted product.
Background technology
ECALL vehicle mounted communication product has the function of remote-wireless communication, GPS location and back-up source, in collision happens, cast anchor or during fortuitous event such as stolen, sends the gps coordinate of car status information and vehicle to car owner or service centre.Lithium battery, is also extensively selected to use lithium battery as stand-by power supply in vehicle-mounted ECALL product by in extensive utilization and mobile phone and other portable equipments as a kind of common reserve battery.In the prior art, adopt mobile module that lithium battery voltage and charging current are managed usually or adopt charging IC that lithium battery is carried out power management.
In the mode that mobile module is managed lithium battery voltage and charging current, intervene through the software of mobile module, detect lithium battery voltage, the control electronic switch is realized the charging purpose.IC carries out lithium battery in the mode of power management in charging, and whether mobile module control charges, and whether the charging of charging IC feedback finishes to wait state.In above-mentioned two kinds of power managements; Lithium battery finishes the back external power supply in charging and can be removed; Thereby mobile module directly supplies power by lithium battery, and lithium battery often is in deep discharge and deep charge state, and this will cause the lithium battery can be by frequent discharging and recharging.
The life-span of lithium battery is by discharging and recharging number of times decision, and all electric weight that cycle of discharging and recharging means battery are charged to full process by sky again by completely using sky, and frequent discharging and recharging causes shorter battery life.And ECALL vehicle mounted communication product is in case after installing, can often dismantle, so need prolong battery useful life as much as possible, can not in time report to the police when avoiding unexpected the generation.
The utility model content
The purpose of the utility model provides a kind of lithium battery management circuit that is used for vehicle-mounted product, and this circuit can effectively reduce charging and discharging lithium battery number of times, extending battery life.
For realizing above-mentioned purpose; The utility model has adopted following technical scheme: a kind of lithium battery management circuit that is used for vehicle-mounted product; Comprise external power supply, lithium battery and mobile module; External power supply and lithium battery, mobile module electrically connect, and the alternative circuit are set, described alternative circuit and lithium battery and mobile module electric connection at an end of external power supply.
The alternative circuit of the utility model is the power management integrated chip or is made up of two metal-oxide-semiconductors and peripheral circuit thereof, through the operating state of mobile module control lithium battery, thereby reaches the purpose of switching power supply.
The beneficial effect of the utility model is: after adopting aforesaid way; Setting through the alternative circuit; Under normal operation; Substitute lithium battery by external power supply fully and supply power, when external power supply is removed or break down, switches to lithium battery and recover until external power supply to the mobile module power supply to mobile module.Significantly reduce the charging and discharging lithium battery number of times thus, increased the lithium battery life-span, can guarantee the power supply source of mobile module simultaneously, situation about can not report to the police when avoiding unexpected the generation.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that the circuit of a kind of specific embodiment of the utility model connects sketch map.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1; A kind of lithium battery management circuit that is used for vehicle-mounted product; Comprise external power supply 10, lithium battery 30 and mobile module 40; External power supply 10 electrically connects with lithium battery 30, mobile module 40, at an end of external power supply 10 alternative circuit 20 is set, and described alternative circuit 20 electrically connects with lithium battery 30 and mobile module 40.The setting of alternative circuit 20 can realize substituting lithium battery 30 to mobile module 40 power supplies by external power supply 10, and the power supply handoff functionality of mobile module 40 is provided.
Special; The alternative circuit 20 of the utility model can be power management integrated chip (figure does not show), and such power management integrated chip can be realized the management to power source path, is the power management integrated chip of BQ24070 like PI (Power Integrations) company's model; This chip can provide the power management IC greater than the electric current of 2A; Because the mobile module immediate current possibly reach 2A, under this kind operating state, this chip can be realized dynamic power management; By lithium battery 30 the part electric current is provided, thereby to the assurance of bigger transmitting power.It can be provided with reference to prior art with being connected of external power supply 10, lithium battery 30 and mobile module 40.
Perhaps; As shown in Figure 1; As the another kind of selectivity embodiment of the utility model, described alternative circuit 20 comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 and peripheral circuit 21, the first metal-oxide-semiconductor Q1 and the external power supply 10 and mobile module 40 electric connections that electrically connect with the described first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2; The second metal-oxide-semiconductor Q2 and lithium battery 30 electrically connect, and peripheral circuit 21 electrically connects with mobile module 40.
Concrete, as shown in Figure 1, the source electrode of the described first metal-oxide-semiconductor Q1 connects external power supply 10, and grid and described peripheral circuit 21 electrically connect, and drain electrode is connected with the power input mouth of said mobile module 40; The source electrode of the described second metal-oxide-semiconductor Q2 connects the drain electrode of the first metal-oxide-semiconductor Q1, and grid and peripheral circuit 21 electrically connect, and drain electrode is connected with described lithium battery 30; Described peripheral circuit 21 electrically connects with the charging control port with the state-detection port of mobile module 40.
General, vehicle-mounted ECALL product uses the maintenance free cell of 12V as external power supply 10, and external power supply 10 passes through mobile module 40 operating voltages of alternative circuit 20 output 4.2V, and inserts the power input mouth of mobile module 40 as power supply.The state-detection of mobile module 40 electrically connects alternative circuit 20 with the charging control port, realizes the monitoring to circuit state.
Further, the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 are P channel-type metal-oxide-semiconductor, and when product powered on for the first time, the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 all opened, and external power supply 10 charges to lithium battery 30 when giving mobile module 40 power supplies.After lithium battery 30 chargings finish, control the second metal-oxide-semiconductor Q2 and close, the first metal-oxide-semiconductor Q1 opens.Then supplied power to mobile module 40 by external power supply 10 fully this moment, and lithium battery 30 no longer is recharged.If external power supply 10 is removed or when breaking down, the second metal-oxide-semiconductor Q2 opens, and then can switch to built-in lithium battery 30 by external power supply 10, thereby guarantee that mobile module 40 works on, can power failure be sent to client or rescue center through network.After external power supply 10 recovered, to lithium battery 30 chargings, then the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 all opened, and as not needing, then can open the second metal-oxide-semiconductor Q2 like needs, and lithium battery 30 is not recharged.From the above, the utility model has reduced lithium battery 30 charging times significantly, thereby has prolonged 30 life-spans of lithium battery, can guarantee the power supply source of mobile module 40 simultaneously, situation about can not report to the police when avoiding unexpected the generation.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (6)
1. lithium battery management circuit that is used for vehicle-mounted product; Comprise external power supply (10), lithium battery (30) and mobile module (40); External power supply (10) electrically connects with lithium battery (30), mobile module (40); It is characterized in that: the end at external power supply (10) is provided with alternative circuit (20), and described alternative circuit (20) electrically connects with lithium battery (30) and mobile module (40).
2. the lithium battery management circuit that is used for vehicle-mounted product according to claim 1 is characterized in that: described alternative circuit (20) is the power management integrated chip.
3. the lithium battery management circuit that is used for vehicle-mounted product according to claim 2 is characterized in that: the model of described power management integrated chip is BQ24070.
4. the lithium battery management circuit that is used for vehicle-mounted product according to claim 1; It is characterized in that: described alternative circuit (20) comprise first metal-oxide-semiconductor (Q1), second metal-oxide-semiconductor (Q2) and and the peripheral circuit (21) that electrically connects with described first metal-oxide-semiconductor (Q1), second metal-oxide-semiconductor (Q2); First metal-oxide-semiconductor (Q1) electrically connects with external power supply (10) and mobile module (40); Second metal-oxide-semiconductor (Q2) electrically connects with lithium battery (30), and peripheral circuit (21) electrically connects with mobile module (40).
5. the lithium battery management circuit that is used for vehicle-mounted product according to claim 4; It is characterized in that: the source electrode of described first metal-oxide-semiconductor (Q1) connects external power supply (10); Grid and described peripheral circuit (21) electrically connect, and drain electrode is connected with the power input mouth of said mobile module (40); The source electrode of described second metal-oxide-semiconductor (Q2) connects the drain electrode of first metal-oxide-semiconductor (Q1), and grid and peripheral circuit (21) electrically connect, and drain electrode is connected with described lithium battery (30); Described peripheral circuit (21) electrically connects with the charging control port with the state-detection port of mobile module (40).
6. the lithium battery management circuit that is used for vehicle-mounted product according to claim 5 is characterized in that: described first metal-oxide-semiconductor (Q1) and second metal-oxide-semiconductor (Q2) are P channel-type metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220237389 CN202602333U (en) | 2012-05-24 | 2012-05-24 | Lithium battery management circuit for automobile products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220237389 CN202602333U (en) | 2012-05-24 | 2012-05-24 | Lithium battery management circuit for automobile products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202602333U true CN202602333U (en) | 2012-12-12 |
Family
ID=47319849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220237389 Expired - Lifetime CN202602333U (en) | 2012-05-24 | 2012-05-24 | Lithium battery management circuit for automobile products |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202602333U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821649A (en) * | 2015-04-30 | 2015-08-05 | 上海闻泰电子科技有限公司 | Mobile phone equipment power supply management method |
| CN108340854A (en) * | 2018-03-06 | 2018-07-31 | 明见（厦门）技术有限公司 | A kind of electricity saving method and system of mobile unit |
-
2012
- 2012-05-24 CN CN 201220237389 patent/CN202602333U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821649A (en) * | 2015-04-30 | 2015-08-05 | 上海闻泰电子科技有限公司 | Mobile phone equipment power supply management method |
| CN108340854A (en) * | 2018-03-06 | 2018-07-31 | 明见（厦门）技术有限公司 | A kind of electricity saving method and system of mobile unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
|
| CX01 | Expiry of patent term |