CN210183036U - Multi-battery charging protection circuit and battery device - Google Patents
Multi-battery charging protection circuit and battery device Download PDFInfo
- Publication number
- CN210183036U CN210183036U CN201921024191.XU CN201921024191U CN210183036U CN 210183036 U CN210183036 U CN 210183036U CN 201921024191 U CN201921024191 U CN 201921024191U CN 210183036 U CN210183036 U CN 210183036U
- Authority
- CN
- China
- Prior art keywords
- interface
- protection
- battery
- battery pack
- charging
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a multisection battery charging protection circuit and battery device, charging protection circuit include first protection unit and second protection unit, first protection unit is configured to the potential control group battery negative pole interface and the balanced break-make that fills the negative pole interface according to group battery positive pole interface, group battery negative pole interface and each tie point interface, second protection unit is configured to the potential control tie point interface according to group battery positive pole interface and each tie point interface and the break-make that corresponds the node interface. The utility model discloses a first protection unit and the second protection unit that set up for concatenating between the anodal interface of group battery and the connection point connects, between each tie point interface and group battery negative pole interface between the battery provides the protection mechanism, have improved the security in the group battery charging process widely to improve the charge-discharge efficiency and the life of group battery.
Description
Technical Field
The utility model relates to an electronic circuit technical field, more specifically say and relate to a multisection battery charging protection circuit and use this protection circuit's battery device.
Background
In real life, it is known that the voltage provided by a single battery is very limited, so that the battery-powered products seen in daily life generally use two or more batteries connected in series for power supply.
With the development of the technology of the rechargeable battery, manufacturers of related battery-powered products have applied the rechargeable battery to the products produced by the manufacturers, and due to a certain difference in internal characteristics of the plurality of batteries connected in series, the imbalance between the batteries is easily increased during the charging process, thereby resulting in a reduction in the overall use efficiency and service life of the battery pack. In order to solve the above technical problems in the prior art, a person skilled in the art generally uses a balance charger to charge a battery pack, and configures a charging protection circuit for a power supply battery pack, but the charging protection circuit in the prior art still has a structural design deficiency, so that the prior charging protection circuit cannot achieve an optimal protection effect on the battery pack.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: a multi-battery charging protection circuit and a battery device using the same are provided.
The utility model provides a solution of its technical problem is:
the charging protection circuit is externally provided with a battery pack positive electrode interface, a battery pack negative electrode interface, a connecting point interface, a balance charging positive electrode interface, a balance charging negative electrode interface and node interfaces, the number of the connecting point interfaces is consistent with that of the node interfaces, the connecting point interfaces are in one-to-one correspondence with the node interfaces, the charging protection circuit comprises a first protection unit and a second protection unit, the first protection unit is configured to control the connection and disconnection of the battery pack negative electrode interface and the balance charging negative electrode interface according to the potentials of the battery pack positive electrode interface, the battery pack negative electrode interface and each connecting point interface, and the second protection unit is configured to control the connection and disconnection of the connecting point interface and the corresponding node interface according to the potentials of the battery pack positive electrode interface and each connecting point interface; the battery pack comprises a battery pack anode interface, a battery pack cathode interface, a plurality of connecting point interfaces and a plurality of node interfaces, wherein the battery pack anode interface is electrically connected with the balanced charging anode interface, the first protection unit is respectively connected with the battery pack anode interface, the battery pack cathode interface, the connecting point interfaces and the balanced charging cathode interface, and the second protection unit is respectively connected with the battery pack anode interface, the connecting point interfaces and the node interfaces.
As a further improvement of the above technical solution, the first protection unit includes a first protection chip, a switch tube Q1 and a switch tube Q2, the positive electrode interface of the battery pack, the negative electrode interface of the battery pack and each connection point interface are respectively connected to each voltage input end of the first protection chip, the discharge control end and the charge control end of the first protection chip are respectively connected to the gate of the switch tube Q1 and the gate of the switch tube Q2, the drain of the switch tube Q1 and the drain of the switch tube Q2 are connected, the source of the switch tube Q1 is connected to the negative electrode interface of the battery pack, the source of the switch tube Q2 is connected to the balanced negative electrode interface, and the balanced negative electrode interface is connected to the current detection end of the first protection chip.
As a further improvement of the technical scheme, the model of the switching tube Q1 and the model of the switching tube Q2 are PSMN1R5-30 YLC.
As a further improvement of the above technical solution, the second protection unit includes a plurality of second protection chips, a switching tube is integrated inside the second protection chip, the number of the second protection chips is equal to the number of the connection point interfaces and the number of the node interfaces, the positive electrode interface of the battery pack and each connection point interface are respectively connected to a voltage input end of each second protection chip, and a charging end of each second protection chip is respectively connected to each node interface.
Another technical solution of the multi-battery charging protection circuit of the present invention is to externally provide a battery pack positive electrode interface, a battery pack negative electrode interface, a connection point interface, a balance charging positive electrode interface, a balance charging negative electrode interface, and a node interface, wherein the number of the connection point interfaces is equal to the number of the node interfaces, the connection point interfaces correspond to the node interfaces one by one, the charging protection circuit includes a first protection unit and a second protection unit, the first protection unit is configured to control the on-off of the battery pack negative electrode interface and the balance charging negative electrode interface according to the potentials of the battery pack positive electrode interface, the battery pack negative electrode interface, and each connection point interface, and the second protection unit is configured to control the on-off of the connection point interface and the corresponding node interface according to the potentials of the battery pack positive electrode interface and each connection point interface; the battery pack comprises a battery pack positive electrode interface, a battery pack negative electrode interface, connecting point interfaces and node interfaces, wherein the battery pack positive electrode interface is electrically connected with the balanced charging positive electrode interface; first protection unit includes two or more third protection chips, switch tube Q3 and switch tube Q4, each the third protection chip cascades in proper order successively, group battery positive pole interface, group battery negative pole interface and each tie point interface link to each other with the voltage input end of each third protection chip respectively, and the control end that discharges and the control end that charges that are located terminal third protection chip link to each other with switch tube Q3's grid and switch tube Q4's grid respectively, switch tube Q3's drain electrode and switch tube Q4's drain electrode link to each other, switch tube Q3's source electrode links to each other with group battery negative pole interface, switch tube Q4's source electrode links to each other with balanced negative pole interface that fills, balanced negative pole interface that fills links to each other with the current detection end that is located terminal third protection chip.
As a further improvement of the technical scheme, the model of the switching tube Q3 and the model of the switching tube Q4 are PSMN1R5-30 YLC.
As a further improvement of the above technical solution, the second protection unit includes a plurality of second protection chips, a switching tube is integrated inside the second protection chip, the number of the second protection chips is equal to the number of the connection point interfaces and the number of the node interfaces, the positive electrode interface of the battery pack and each connection point interface are respectively connected to a voltage input end of each second protection chip, and a charging end of each second protection chip is respectively connected to each node interface.
The utility model discloses still disclose a battery device simultaneously, including above arbitrary the multisection battery charging protection circuit and a plurality of battery, it is a plurality of the battery sets up respectively between anodal interface of group battery and connecting point interface, between two adjacent connecting point interfaces and between connecting point interface and the group battery negative pole interface.
The utility model has the advantages that: the utility model discloses a first protection unit and the second protection unit that set up for concatenating between the anodal interface of group battery and the connection point connects, between each tie point interface and group battery negative pole interface between the battery provides the protection mechanism, have improved the security in the group battery charging process widely to improve the charge-discharge efficiency and the life of group battery.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
Fig. 1 is a circuit frame diagram of the charge protection circuit of the present invention;
fig. 2 is a circuit diagram of a first embodiment of the charging protection circuit of the present invention;
fig. 3 is a circuit diagram of a second embodiment of the charging protection circuit of the present invention.
Detailed Description
The conception, specific structure, and technical effects of the present application will be described clearly and completely with reference to the accompanying drawings and embodiments, so that the purpose, features, and effects of the present application can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts based on the embodiments of the present application belong to the protection scope of the present application. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other. Finally, it should be noted that the terms "center, upper, lower, left, right, vertical, horizontal, inner, outer" and the like as used herein refer to an orientation or positional relationship based on the drawings, which is only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
Referring to fig. 1-2, the present application discloses a multi-battery charging protection circuit, wherein a first embodiment of the multi-battery charging protection circuit comprises a positive battery interface, a negative battery interface, a connection point interface, a balanced positive charging interface, a balanced negative charging interface and a node interface, the number of the connecting point interfaces is consistent with that of the node interfaces, the connecting point interfaces correspond to the node interfaces one by one, the charging protection circuit comprises a first protection unit and a second protection unit, wherein the first protection unit is configured to control the connection and disconnection of the negative electrode interface of the battery pack and the balanced charging and negative electrode interface according to the potentials of the positive electrode interface of the battery pack, the negative electrode interface of the battery pack and each connection point interface, the second protection unit is configured to control connection point interfaces and corresponding node interfaces to be switched on and off according to the positive electrode interface of the battery pack and the potentials of the connection point interfaces; the battery pack comprises a battery pack anode interface, a battery pack cathode interface, a plurality of connecting point interfaces and a plurality of node interfaces, wherein the battery pack anode interface is electrically connected with the balanced charging anode interface, the first protection unit is respectively connected with the battery pack anode interface, the battery pack cathode interface, the connecting point interfaces and the balanced charging cathode interface, and the second protection unit is respectively connected with the battery pack anode interface, the connecting point interfaces and the node interfaces. The protection mechanism of this embodiment is as follows: the balance charging technology in the prior art is divided into independent balance charging and series balance charging, the embodiment is suitable for series balance charging, in the series balance charging technology, the balance charger can charge different batteries according to the charging condition of each battery, if in the practical application process, the battery detection function of the balance charger has a problem, the balance charger can only charge continuously, and therefore the battery is overcharged and damaged. In this embodiment, the first protection unit is mainly responsible for charge protection of a battery located at an end of the battery pack and discharge protection of the entire battery pack, and the second protection unit is mainly responsible for charge protection of each battery except the end battery in the battery pack.
In a further preferred embodiment, the first protection unit includes a first protection chip, and if the battery pack to be protected has only two batteries, the first protection chip may be selected from HY2120, R5460X, and if the battery pack to be protected has more than two batteries, the first protection chip may be selected from S-8204A, UCC 3957. Referring to fig. 2, the present embodiment will be described with reference to a charge/discharge protection chip of model No. HY2120 as the first protection chip. The first protection chip comprises a first protection chip of which the model is HY2120, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a switch tube Q1 and a switch tube Q2, a positive electrode interface of the battery pack is connected with a first voltage input end (VDD end) of the first protection chip through the resistor R1, a connection point interface is connected with a second voltage input end (VC end) of the first protection chip through the resistor R2, a negative electrode interface of the battery pack is connected with a third voltage input end (VSS end) of the first protection chip, two ends of the capacitor C1 are connected with the first voltage input end (VDD end) and the third voltage input end (VSS end) of the first protection chip respectively, two ends of the capacitor C2 are connected with the second voltage input end (VC end) and the third voltage input end (VSS end) of the first protection chip respectively, a discharge control end (OD 63end) and a charge control end (OC 1) of the first protection chip are connected with a grid electrode of the switch tube Q2 and the switch tube Q2 The gate of the switch tube Q1 is connected with the drain of the switch tube Q2, the source of the switch tube Q1 is connected with the negative electrode interface of the battery pack, the source of the switch tube Q2 is connected with the balanced negative electrode interface, and the balanced negative electrode interface is connected with the current detection end of the first protection chip through the resistor R3. The first protection chip of the model is a built-in high-precision voltage detection circuit and a time delay circuit, is used for the protection chips of two series lithium ion/lithium polymer rechargeable batteries and is provided with overcharge protection, overdischarge protection and overcurrent protection. The first protection chip judges whether the battery pack is overcharged or not by detecting the potentials of three nodes in the battery pack (namely circuits at three positions of a positive electrode interface, a negative electrode interface and a connecting point interface of the battery pack), so that the on-off of the switch tube Q1 and the switch tube Q2 are controlled, and the charging loop of the battery pack and the balance charger is controlled.
Further, in a preferred embodiment, in this embodiment, the type of the switching tube Q1 and the type of the switching tube Q2 are both PSMN1R5-30YLC, the type of the switching tube is an N-channel field effect transistor, and the type of the switching tube has a low on-state resistance and extremely low loss during operation.
Further, as a preferred implementation manner, in this embodiment, the second protection unit is mainly used to implement charging protection of each battery in the battery pack (except for the battery located at the end being protected by the first protection unit), so that the second protection unit includes a plurality of second protection chips, where the second protection chips are single battery charging protection chips, and in this embodiment, the second protection chips with switch tubes integrated therein are preferred, such as N811, and certainly, the second protection chips without switch tubes integrated therein, such as DW01, may also be selected. In this embodiment, the model N811 is used as the second protection chip, and the application status of two batteries is described. In this embodiment, the second protection unit includes a second protection chip of which the model is N811, a resistor R4, a resistor R5, and a capacitor C3, the positive interface of the battery pack is connected to the first voltage input terminal (VDD terminal) of the second protection chip through the resistor R4, two ends of the capacitor C3 are connected to the first voltage input terminal (VDD terminal) and the second voltage input terminal (GND terminal) of the second protection chip, two voltage input terminals (GND terminals) of the second protection chip are connected to the connection point interface, two ends of the resistor R5 are connected to the current detection terminal (VM terminal) and the charging terminal (P-terminal) of the second protection chip, and the charging terminal (P-terminal) of the second protection chip is connected to the node interface. Specifically, the second protection chip of the type described in this embodiment is a single battery protection chip, and also integrates overvoltage charging protection and overcurrent protection functions, and a switching tube is configured inside the second protection chip, so that a peripheral circuit of the second protection chip is effectively simplified.
Referring to fig. 3, the second embodiment of the charge protection circuit in the present application is different from the first embodiment in that the first protection unit is configured with two or more battery charge/discharge protection chips that can be cascaded with each other, and the second embodiment can achieve more battery protection functions than the first embodiment because the number of batteries protected by a single battery charge/discharge protection chip is limited. In this embodiment, the model number S-8204A is used as the third protection chip. In this embodiment, the first protection unit includes two or more than two third protection chips with model number S-8204A, a switch tube Q3 and a switch tube Q4, each of the third protection chips is cascaded in sequence, the positive electrode interface, the negative electrode interface and the connection point interfaces of the battery pack are respectively connected with the voltage input ends (VDD, VC1 and VC2) of the third protection chips, the discharge control end and the charge control end of the third protection chip positioned at the tail end are respectively connected with the grid electrode of the switching tube Q3 and the grid electrode of the switching tube Q4, the drain electrode of the switch tube Q3 is connected with the drain electrode of the switch tube Q4, the source electrode of the switch tube Q3 is connected with the negative electrode interface of the battery pack, and the source electrode of the switching tube Q4 is connected with a balanced cathode charging interface, and the balanced cathode charging interface is connected with the current detection end of the third protection chip at the tail end.
In addition, it can be seen from fig. 3 how, when the battery pack includes more than two batteries, the second protection chips of the second protection units are connected to the positive electrode interface of the battery pack, the connection point interfaces, and the node interfaces.
The present application also discloses a battery device, wherein the battery device comprises a plurality of battery charging protection circuits and a plurality of batteries, and the plurality of batteries are respectively arranged between the positive electrode interface and the connection point interface of the battery pack, between two adjacent connection point interfaces, and between the connection point interface and the negative electrode interface of the battery pack. In addition, in order to save cost, in this embodiment, more than one series battery pack may be disposed between the positive electrode interface of the battery pack and the connection point interface, between two adjacent connection point interfaces, and between the connection point interface and the negative electrode interface of the battery pack, the second protection unit needs to protect external voltage and current parameters of the plurality of batteries disposed between the positive electrode interface of the battery pack and the connection point interface, and between two adjacent connection point interfaces, and although the second protection unit cannot independently protect each battery, the complexity of the circuit can be greatly reduced, and meanwhile, the production cost can be reduced.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (8)
1. The charging protection circuit of the multiple batteries is characterized in that: the charging protection circuit is externally provided with a battery pack positive electrode interface, a battery pack negative electrode interface, a connecting point interface, a balanced charging positive electrode interface, a balanced charging negative electrode interface and a node interface, the number of the connecting point interfaces is consistent with that of the node interfaces, the connecting point interfaces correspond to the node interfaces one by one, the charging protection circuit comprises a first protection unit and a second protection unit, the first protection unit is configured to control the connection and disconnection of the battery pack negative electrode interface and the balanced charging negative electrode interface according to the potentials of the battery pack positive electrode interface, the battery pack negative electrode interface and each connecting point interface, and the second protection unit is configured to control the connection and disconnection of the connecting point interface and the corresponding node interface according to the potentials of the battery pack positive electrode interface and each connecting point interface; the battery pack comprises a battery pack anode interface, a battery pack cathode interface, a plurality of connecting point interfaces and a plurality of node interfaces, wherein the battery pack anode interface is electrically connected with the balanced charging anode interface, the first protection unit is respectively connected with the battery pack anode interface, the battery pack cathode interface, the connecting point interfaces and the balanced charging cathode interface, and the second protection unit is respectively connected with the battery pack anode interface, the connecting point interfaces and the node interfaces.
2. The multi-battery charging protection circuit of claim 1, wherein: first protection unit includes first protection chip, switch tube Q1 and switch tube Q2, positive interface of group battery, group battery negative pole interface and each tie point interface link to each other with each voltage input end of first protection chip respectively, the control end that discharges and the control end that charges of first protection chip link to each other with switch tube Q1's grid and switch tube Q2's grid respectively, switch tube Q1's drain electrode and switch tube Q2's drain electrode link to each other, switch tube Q1's source electrode links to each other with group battery negative pole interface, switch tube Q2's source electrode and balanced negative pole interface link to each other, balanced negative pole interface that fills links to each other with first protection chip's current detection end.
3. The multi-battery charging protection circuit of claim 2, wherein: the model of the switching tube Q1 and the model of the switching tube Q2 are PSMN1R5-30 YLC.
4. The multi-battery charging protection circuit of claim 3, wherein: the second protection unit comprises a plurality of second protection chips, a switch tube is integrated in each second protection chip, the number of the second protection chips is consistent with that of the connection point interfaces and the node interfaces, the positive electrode interface of the battery pack and each connection point interface are respectively connected with the voltage input end of each second protection chip, and the charging end of each second protection chip is respectively connected with each node interface.
5. The multi-battery charging protection circuit of claim 1, wherein: first protection unit includes two or more third protection chips, switch tube Q3 and switch tube Q4, each the third protection chip cascades in proper order successively, group battery positive pole interface, group battery negative pole interface and each tie point interface link to each other with the voltage input end of each third protection chip respectively, and the control end that discharges and the control end that charges that are located terminal third protection chip link to each other with switch tube Q3's grid and switch tube Q4's grid respectively, switch tube Q3's drain electrode and switch tube Q4's drain electrode link to each other, switch tube Q3's source electrode links to each other with group battery negative pole interface, switch tube Q4's source electrode links to each other with balanced negative pole interface that fills, balanced negative pole interface that fills links to each other with the current detection end that is located terminal third protection chip.
6. The multi-battery charging protection circuit of claim 5, wherein: the model of the switching tube Q3 and the model of the switching tube Q4 are PSMN1R5-30 YLC.
7. The multi-battery charging protection circuit of claim 6, wherein: the second protection unit comprises a plurality of second protection chips, a switch tube is integrated in each second protection chip, the number of the second protection chips is consistent with that of the connection point interfaces and the node interfaces, the positive electrode interface of the battery pack and each connection point interface are respectively connected with the voltage input end of each second protection chip, and the charging end of each second protection chip is respectively connected with each node interface.
8. A battery device, characterized in that: the multi-battery charging protection circuit according to any one of claims 1 to 7, and a plurality of batteries respectively disposed between the positive electrode interface of the battery pack and the connection point interface, between two adjacent connection point interfaces, and between the connection point interface and the negative electrode interface of the battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921024191.XU CN210183036U (en) | 2019-07-02 | 2019-07-02 | Multi-battery charging protection circuit and battery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921024191.XU CN210183036U (en) | 2019-07-02 | 2019-07-02 | Multi-battery charging protection circuit and battery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210183036U true CN210183036U (en) | 2020-03-24 |
Family
ID=69839859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921024191.XU Active CN210183036U (en) | 2019-07-02 | 2019-07-02 | Multi-battery charging protection circuit and battery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210183036U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380470A (en) * | 2019-07-02 | 2019-10-25 | 佛山市实达科技有限公司 | Multiple batteries charge protector and cell apparatus |
| WO2023047753A1 (en) * | 2021-09-22 | 2023-03-30 | 株式会社村田製作所 | Battery pack and vehicle |
-
2019
- 2019-07-02 CN CN201921024191.XU patent/CN210183036U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380470A (en) * | 2019-07-02 | 2019-10-25 | 佛山市实达科技有限公司 | Multiple batteries charge protector and cell apparatus |
| WO2023047753A1 (en) * | 2021-09-22 | 2023-03-30 | 株式会社村田製作所 | Battery pack and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107231015B (en) | A kind of battery, terminal and charging system | |
| CN102684165B (en) | Charge and discharge protection circuit for multi-section lithium battery | |
| CN102195314A (en) | Circuit and method for balancing battery cells | |
| CN101916983A (en) | Battery protection circuit and portable light | |
| CN103001275A (en) | Battery pack, electronic device, and battery pack device | |
| CN210183036U (en) | Multi-battery charging protection circuit and battery device | |
| CN202309039U (en) | Lithium-ion/lithium-polymer battery pack protection circuit | |
| WO2017219359A1 (en) | Multi-lug battery | |
| CN104577995A (en) | Lithium battery protection circuit device with fly-wheel circuit | |
| CN100527556C (en) | Multi-section lithium ion battery pack protection circuit | |
| CN210956904U (en) | Common-inductance energy storage type lithium battery equalization circuit | |
| CN106655412A (en) | Battery system | |
| CN209948749U (en) | Charge-discharge control protection circuit | |
| CN209642357U (en) | A kind of lithium battery voltage monitoring and protecting device based on electric resistance partial pressure type | |
| CN110854953A (en) | Battery charging and discharging protection circuit and battery device | |
| CN206650426U (en) | A kind of 4S lithium battery protection boards | |
| CN214420253U (en) | Battery dynamic balance protection device | |
| CN215498307U (en) | Fast protection circuit and fast device of filling | |
| CN216390559U (en) | Battery management circuit and energy storage system | |
| CN220022390U (en) | Control circuit for parallel charging and discharging of multi-battery pack and multi-parallel battery pack | |
| CN201134665Y (en) | Power battery pack protection circuit of low power consumption | |
| CN214280983U (en) | Equalization chip of series battery pack and battery management system | |
| CN220358853U (en) | Lithium battery pack charging saturation equalization circuit | |
| CN212435390U (en) | Battery charging and discharging control circuit and battery device | |
| CN216774326U (en) | Charge-discharge control circuit and battery protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |