CN204928304U - Novel charging and protection system of two sections lithium cell core group batteries - Google Patents
Novel charging and protection system of two sections lithium cell core group batteries Download PDFInfo
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- CN204928304U CN204928304U CN201520336078.0U CN201520336078U CN204928304U CN 204928304 U CN204928304 U CN 204928304U CN 201520336078 U CN201520336078 U CN 201520336078U CN 204928304 U CN204928304 U CN 204928304U
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Abstract
The utility model relates to a novel charging and protection system of two sections lithium cell core group batteries, it charges and protects technical field to belong to electron and lithium cell group, use the special management integrated circuit of two single section lithium batteries and two special integrated circuit of single section lithium battery protection to constitute, this design is by charging unit circuit and corresponding lithium battery protection circuit cooperation work, independently charge respectively to two sections lithium cells in the group battery when charging, can charge completely to every section lithium cell, can reduce the fault rate of lithium cell group, greatly prolong the life of battery, and more the low performance is better than traditional product cost for the lithium batteries ware of this scheme of use production and lithium battery protection board.
Description
Technical field
The utility model relates to charging and the protection system of two joint lithium cell core battery pack, particularly relates to the novel charging of a kind of two joint lithium cell core battery pack that wireless interspeaker uses and protection system.
Background technology
Current wireless interspeaker, major part adopts two joint 3.7V lithium battery series connection to form the battery-powered of 7.4V voltage; Due to the characteristic of lithium battery, when battery output short-circuit or charging overcharge, lithium battery may explode, and internal battery pack needs two special joint lithium battery protection boards and protects; When charging to lithium battery group, need with special two joint lithium electricity chargers to batteries charging, battery pack could be full of electricity like this and can not overcharge, protection battery also extends battery.
The shortcoming of two traditional joint lithium battery protection boards; (require very high to two battery consistencies; require that the internal resistance error of two batteries is within 5 milliohms; voltage error is within 0.02V); due to lithium battery it storage and use procedure in, the self discharge of every batteries is different with internal resistance, and after the use of one-phase, the voltage of two batteries can change; such as a batteries voltage reaches 4.2V, and an other economize on electricity pressure only has 3.7V; And when charging, baffle detects that an economize on electricity pressure reaches 4.2V, and it has just cut off charging circuit and has not recharged, and at this moment its electricity of another joint 3.7V battery is little; When discharging, that batteries voltage drop of 3.7V is very fast, and baffle detects that dead battery has just been cut off discharge circuit; So tradition two joint lithium battery groups due to inner two batteries voltages inconsistent and break down very many.
Summary of the invention
Goal of the invention: for solving the problems of the technologies described above; the charging of a kind of two novel joint lithium cell core battery pack described in the utility model and protection system; adopt and two joint lithium batteries in lithium battery group are charged respectively and protected; can be fully charged often saving lithium battery; the failure rate of lithium battery group can be reduced, greatly extend the useful life of battery pack; And more low performance is better than traditional product cost for the lithium battery charger using this programme to produce and lithium battery protection board.
Technical scheme: a kind of charging of two novel joint lithium cell core battery pack and protection system, its structure comprises: live part circuit and corresponding lithium battery protection circuit, described two single lithium battery charging dedicated management integrated circuit and two single lithium battery protection application-specific integrated circuit (ASIC)s are installed on charging circuit board and lithium battery protection circuit plate respectively, described charging circuit board is also provided with the AC current rectifying and wave filtering circuit and transforming circuit that the dedicated management integrated circuit that to charge with single lithium battery is connected, a public output contact CI output point and independent output contact CH+ output point and output contact CH-output point is separately provided with between described two single lithium battery charging dedicated management circuit, described lithium cell charging dedicated management circuit is connected with the LED light distinguishing and whether charging, described transforming circuit comprises based on former limit control model, the pwm power switch of ± 5% precision and with pwm power switch with the use of playing the AC/DC voltage converter AC:90 ~ 240V inputted being converted to two groups of DC:5V.
Described lithium battery protection circuit plate is connected with two joint lithium batteries by wire, described two single lithium battery protective circuit plates to be connected on two joint lithium batteries and two joint lithium batteries are formed and can carry out charge protection when charging respectively to two batteries, also two batteries are carried out respectively to the series battery of discharge prevention when discharging and exporting, described single lithium battery protection application-specific integrated circuit (ASIC) comprises CS213 diagnosing chip and is connected to the metal-oxide-semiconductor control switch that CS213 diagnosing chip plays the closed lithium battery of disconnection, the charging input end mouth of described two single lithium battery protective circuits comprises public input contact CI input point and input contact CH+ input point and separately input contact CH-input point separately.
Work Yuan reason:
The protection philosophy during work of lithium battery protection circuit plate: single lithium battery protection application-specific integrated circuit (ASIC) (3) comprises CS213 diagnosing chip and is connected to metal-oxide-semiconductor control switch CS213 diagnosing chip playing disconnection or closed lithium battery; two single lithium battery protective circuits are provided with public input contact CI input point and input contact CH+ input point and separately input contact CH-input point separately; during charging; by CH+ input point and CI input point, lithium battery BT1 is charged; by CI and CH-, lithium battery BT2 being charged, can charge respectively to two joint lithium batteries when charging; In charging process; suppose that BT1 is full of electricity; at this moment U1 (CS213) diagnosing chip controls metal-oxide-semiconductor control switch cut-out circuit thus protects BT1 not recharge; at this moment BT2 is also in continuation charging; until be full of, U2 (CS213) diagnosing chip controls metal-oxide-semiconductor control switch cut-out circuit and does not recharge from you protection BT2; During electric discharge, two batteries discharged in series; By P+ and P-out-put supply in Fig. 2 to intercom; When output short-circuit, the CS213 diagnosing chip of two single lithium battery protective circuits controls metal-oxide-semiconductor control switch, cuts off circuit simultaneously or has at least one group can cut off circuit, thus protection lithium battery group is no longer discharged, and can not blast.
The protection philosophy during work of lithium battery charging circuit baffle: the managing chip of two single lithium battery charging dedicated management inside circuits, its operating voltage is DC:4.5V ~ 6V, and overtension can damage element; Pwm power switch is based on former limit control model and precision is ± 5%, form one by pwm power switch and pressure swing reformer and interlock circuit and exchange to-DC switching circuit, AC:90 ~ the 240V of input is converted to two groups of DC:5V, respectively to two single lithium battery charging dedicated management circuit supplies, two single lithium battery charging dedicated management circuit export two groups of 4.2V voltages respectively, contacted with lithium battery by CH+, CI, CH-tri-contacts, intelligent charge is carried out to lithium battery.
tool of the present invention has the following advantages:
1. in pair lithium battery group, two joint lithium batteries charge respectively and protect, and be fully charged, can reduce the failure rate of lithium battery group, greatly extending the useful life of battery pack to often saving lithium battery.
2. it is expensive that two joint lithium battery charging management circuits and special two special in the market save lithium battery protection circuit price comparisons; the single lithium battery charging dedicated management circuit that the utility model adopts and single lithium battery protection dedicated management circuit are owing to using in a large number in smart mobile phone industry; so element high-intelligentization and price is low, thus the lithium battery charger using this programme to produce and lithium battery protection board than traditional product cost, more low performance is better.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and the schematic components and parts case study on implementation that the utility model uses and explanation thereof, for explaining the utility model, are not formed unique restriction of the present utility model.In the accompanying drawings:
Fig. 1 is system block diagram of the present utility model;
Fig. 2 is the circuit Yuan reason figure of battery protection circuit of the present utility model;
Fig. 3 is the circuit Yuan reason figure of charging circuit baffle of the present utility model.
Embodiment
Implement according to the technical requirement of the schematic diagram of circuit working shown in accompanying drawing and accompanying drawing explanation and the following stated, can the utility model be realized.
With reference to figure 1, Fig. 2 and Fig. 3; a kind of charging of two novel joint lithium cell core battery pack and protection system; protect application-specific integrated circuit (ASIC) (3) to form by two single lithium battery charging dedicated management integrated circuit (12) and two single lithium battery, two single lithium battery charging dedicated management integrated circuit (12) and two single lithium battery protection application-specific integrated circuit (ASIC) (3) are installed on charging circuit board (1) and lithium battery protection circuit plate (2) respectively; charging circuit board (1) is also provided with the AC current rectifying and wave filtering circuit (9) and transforming circuit (10) that the dedicated management integrated circuit (12) that to charge with single lithium battery is connected, a public output contact CI output point (13) and independent output contact CH+ output point (14) and independent output contact CH-output point (15) is provided with between two single lithium battery charging dedicated management circuit (12), lithium cell charging dedicated management circuit is connected with the LED light distinguishing and whether charging, transforming circuit comprises based on former limit control model, the pwm power switch (10) of ± 5% precision and with pwm power switch with the use of playing the AC/DC voltage converter (11) AC:90 ~ 240V inputted being converted to two groups of DC:5V, lithium battery protection circuit plate (2) is connected with two joint lithium batteries by wire, two single lithium battery protection application-specific integrated circuit (ASIC) (3) to be connected on two joint lithium batteries and two joint lithium batteries are formed can carry out charge protection when charging to two batteries respectively, also two batteries are carried out respectively to the series battery of discharge prevention when discharging and exporting, two single lithium battery protective circuits (3) comprise CS213 diagnosing chip (5) and are connected to CS213 diagnosing chip works the metal-oxide-semiconductor control switch (4) disconnecting closed lithium battery, the charging input end mouth of two single lithium battery protective circuits comprises public input contact CI input point (6) and input contact CH+ input point (8) and separately input contact CH-input point (7) separately.
These are only better case study on implementation of the present utility model; not in order to limit the utility model; all any amendment, components and parts done within spirit of the present utility model and principle are equivalent to be replaced and improvement etc., all should be included within protection range of the present utility model.
Claims (3)
1. the charging of novel two joint lithium cell core battery pack and protection system, two single lithium battery charging dedicated management integrated circuit (12) and two single lithium battery protection application-specific integrated circuit (ASIC) (3) are used to form, it is characterized in that: two single lithium battery charging dedicated management integrated circuit (12) and two single lithium battery protection application-specific integrated circuit (ASIC) (3) are installed on charging circuit board (1) and lithium battery protection circuit plate (2) respectively, described lithium battery protection circuit plate (2) is connected with two joint lithium batteries by wire, described two single lithium battery protective circuit plates (2) to be connected on two joint lithium batteries and two joint lithium batteries are formed can carry out charge protection when charging to two batteries respectively, also two batteries are carried out respectively to the series battery of discharge prevention when discharging and exporting, described two single lithium battery protection application-specific integrated circuit (ASIC) (3) comprise CS213 diagnosing chip (5) and are connected to CS213 diagnosing chip works the metal-oxide-semiconductor control switch (4) disconnecting closed lithium battery, the charging input end mouth of described two single lithium battery protection application-specific integrated circuit (ASIC) (3) comprises public input contact CI input point (6) and input contact CH+ input point (8) and separately input contact CH-input point (7) separately.
2. the charging of a kind of novel two joint lithium cell core battery pack according to claim 1 and protection system, it is characterized in that: described charging circuit board (1) is also provided with the AC current rectifying and wave filtering circuit (9) and transforming circuit (10) that the dedicated management integrated circuit (12) that to charge with single lithium battery is connected, a public output contact CI output point (13) and independent output contact CH+ output point (14) and independent output contact CH-output point (15) is provided with between described two single lithium battery charging dedicated management circuit (12), described lithium cell charging dedicated management circuit is connected with the LED light distinguishing and whether charging.
3. the charging of a kind of novel two joint lithium cell core battery pack according to claim 2 and protection system, is characterized in that: described transforming circuit comprise based on the pwm power switch (10) of former limit control model, ± 5% precision and with pwm power switch with the use of playing the AC/DC voltage converter (11) AC:90 ~ 240V inputted being converted to two groups of DC:5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520336078.0U CN204928304U (en) | 2015-05-23 | 2015-05-23 | Novel charging and protection system of two sections lithium cell core group batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520336078.0U CN204928304U (en) | 2015-05-23 | 2015-05-23 | Novel charging and protection system of two sections lithium cell core group batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204928304U true CN204928304U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520336078.0U Expired - Fee Related CN204928304U (en) | 2015-05-23 | 2015-05-23 | Novel charging and protection system of two sections lithium cell core group batteries |
Country Status (1)
| Country | Link |
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| CN (1) | CN204928304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111033926A (en) * | 2019-03-08 | 2020-04-17 | Oppo广东移动通信有限公司 | Battery cell protection circuit and electronic equipment |
-
2015
- 2015-05-23 CN CN201520336078.0U patent/CN204928304U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111033926A (en) * | 2019-03-08 | 2020-04-17 | Oppo广东移动通信有限公司 | Battery cell protection circuit and electronic equipment |
| WO2020181437A1 (en) * | 2019-03-08 | 2020-09-17 | Oppo广东移动通信有限公司 | Cell protection circuit and electronic device |
| US20210218258A1 (en) * | 2019-03-08 | 2021-07-15 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Cell Protection Circuit and Electronic Device |
| EP3771057A4 (en) * | 2019-03-08 | 2021-07-28 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Cell protection circuit and electronic device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20210523 |
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| CF01 | Termination of patent right due to non-payment of annual fee |