CN205829228U - Ni-MH rechargeable battery pack protection circuit - Google Patents
Ni-MH rechargeable battery pack protection circuit Download PDFInfo
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- CN205829228U CN205829228U CN201620721659.0U CN201620721659U CN205829228U CN 205829228 U CN205829228 U CN 205829228U CN 201620721659 U CN201620721659 U CN 201620721659U CN 205829228 U CN205829228 U CN 205829228U
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- 229910018095 Ni-MH Inorganic materials 0.000 title claims abstract description 57
- 229910018477 Ni—MH Inorganic materials 0.000 title claims abstract description 57
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 14
- 239000001257 hydrogen Substances 0.000 claims abstract description 14
- 229910052987 metal hydride Inorganic materials 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims 5
- 230000005611 electricity Effects 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000005303 weighing Methods 0.000 claims 1
- 238000005070 sampling Methods 0.000 abstract description 18
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000003912 environmental pollution Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910005813 NiMH Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010926 waste battery Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
本实用新型公开了一种镍氢充电电池组保护电路，结构为：镍氢充电电池组由多个镍氢电池串联，第1个镍氢电池负极连接到电压保护MOS管，所述电压保护MOS管连接到负载负极；第1个镍氢电池正负极连接到第1个均衡模块输入端，第1个均衡模块输出端连接到电池管理芯片，所述第1个镍氢电池正极连接到第1个电压采样模块的输入端，第1个电压采样模块的输出端连接到电池管理芯片；以后每一个镍氢电池与其对应的电压采用模块和均衡模块的连接方式与第1个相同；电池管理芯片连接到高效DC‑DC转换模块，高效DC‑DC转换模块一端接地，另一端连接到负载正极。本实用新型实现过电池保护，保障了电池单元之间状态一致和均衡，避免镍氢充电电池组容易损坏的情况。
The utility model discloses a protection circuit for a nickel-hydrogen rechargeable battery pack, which is structured as follows: a nickel-hydrogen rechargeable battery pack is connected in series with a plurality of nickel-hydrogen batteries, the negative electrode of the first nickel-hydrogen battery is connected to a voltage protection MOS tube, and the voltage protection MOS The tube is connected to the negative pole of the load; the positive and negative poles of the first Ni-MH battery are connected to the input terminal of the first balancing module, the output terminal of the first balancing module is connected to the battery management chip, and the positive pole of the first Ni-MH battery is connected to the first The input terminal of one voltage sampling module, the output terminal of the first voltage sampling module is connected to the battery management chip; the connection method between each Ni-MH battery and its corresponding voltage adopting module and equalizing module is the same as that of the first one; battery management The chip is connected to a high-efficiency DC-DC conversion module, one end of the high-efficiency DC-DC conversion module is grounded, and the other end is connected to the positive pole of the load. The utility model realizes over-battery protection, ensures consistent and balanced states among the battery units, and avoids the situation that the Ni-MH rechargeable battery pack is easily damaged.
Description
技术领域technical field
本实用新型涉及到镍氢电池领域，特别涉及一种镍氢充电电池组保护电路。The utility model relates to the field of nickel-hydrogen batteries, in particular to a protection circuit for a nickel-hydrogen rechargeable battery pack.
背景技术Background technique
大量电子产品采用二次可充电池供电，其中，镍氢充电电池因技术成熟且价格低廉，应用非常广泛。镍氢充电电池不仅成本低廉，使用时安全性也比锂电池高而不易发生爆炸，为降低成本通常不对镍氢充电电池采用保护电路。A large number of electronic products are powered by secondary rechargeable batteries. Among them, Ni-MH rechargeable batteries are widely used because of their mature technology and low price. Ni-MH rechargeable batteries are not only low in cost, they are also safer than lithium batteries and less likely to explode during use. In order to reduce costs, protection circuits are usually not used for Ni-MH rechargeable batteries.
但在实际应用中，镍氢充电电池单体电压低，大多数情况要多电池串联构成电池组使用。多个镍氢充电电池串联构成电池组时，因为单元电池的一致性存在或多或少的差异，导致镍氢充电电池组的个别电池单元容易过充电或者过放电而过早损坏，最终引起电池组整体失效必须全部更换，更换新电池组带来的大量经济损失和环境污染。However, in practical applications, the voltage of a nickel-metal hydride rechargeable battery is low, and in most cases, multiple batteries are connected in series to form a battery pack. When multiple Ni-MH rechargeable batteries are connected in series to form a battery pack, due to the more or less differences in the consistency of the unit cells, individual battery cells of the Ni-MH rechargeable battery pack are easily overcharged or over-discharged and prematurely damaged, eventually causing the battery If the battery pack fails as a whole, it must be replaced completely, and the replacement of a new battery pack will cause a lot of economic losses and environmental pollution.
镍氢充电电池可以反复充电和放电，是电子产品中常用的可充电池，通常多个镍氢充电电池单元串联成电池组以提高对外供电电压。电池组内的单元电池因为个体不能完全一致而存在差异，在充电时容易出现个别电池已提前被充满，但外部充电电路判断充电未完成，充电过程持续进行，则这些电池会被过充电而发热，以致寿命缩短或者永久失效。放电时，会出现个别电池电量已经接近耗尽，但因为电池组总电压仍然足够高，则放电过程会持续进行，则这些电池会出现过放电而导致寿命缩短或者永久失效。Ni-MH rechargeable batteries can be repeatedly charged and discharged, and are commonly used rechargeable batteries in electronic products. Usually, multiple Ni-MH rechargeable battery cells are connected in series to form a battery pack to increase the external power supply voltage. The unit batteries in the battery pack are different because they cannot be completely consistent. When charging, it is easy for some batteries to be fully charged in advance. However, the external charging circuit judges that the charging is not completed. If the charging process continues, these batteries will be overcharged and generate heat. , resulting in shortened life or permanent failure. When discharging, individual batteries will be nearly exhausted, but because the total voltage of the battery pack is still high enough, the discharge process will continue, and these batteries will be over-discharged, resulting in shortened life or permanent failure.
当镍氢充电电池组中个别单元电池性能下降或者损坏时，会导致整个电池组的工作状态显著下降，乃至不可使用必须整体更换，产生较大的经济损失和环境污染。如果采用保护电路，则可以有效避免电池组单元过充和过放的情况出现，从而提高电池组的工作效能和寿命。When the performance of individual unit cells in the Ni-MH rechargeable battery pack is degraded or damaged, the working status of the entire battery pack will be significantly reduced, or even unusable and must be replaced as a whole, resulting in large economic losses and environmental pollution. If the protection circuit is adopted, the occurrence of overcharging and overdischarging of the cells of the battery pack can be effectively avoided, thereby improving the working efficiency and life of the battery pack.
镍氢充电电池由于安全性比锂电池高，不容易爆炸，价格也相对便宜，因此在应用时主要在充电电路一侧采用过压及过热保护，而对电池组的单元电池本身未采用保护电路。因此大量采用镍氢充电电池组供电的设备，因个别单元电池一致性存在差异，非常容易导致个别单元电池过充或过放而提前失效，导致电池整体性能快速下降、电池过早失效等情况。因个别电池单元性能下降而导致整个电池组不可用而整体更换，会引起大量浪费和环境污染。Ni-MH rechargeable batteries are safer than lithium batteries, are not easy to explode, and the price is relatively cheap. Therefore, in application, overvoltage and overheat protection are mainly used on the side of the charging circuit, and no protection circuit is used for the unit cells of the battery pack. . Therefore, a large number of devices powered by nickel-metal hydride rechargeable battery packs, due to differences in the consistency of individual unit batteries, are very likely to cause premature failure of individual unit batteries due to overcharging or overdischarging, resulting in rapid decline in overall battery performance and premature battery failure. Due to the performance degradation of individual battery cells, the entire battery pack is unusable and replaced as a whole, which will cause a lot of waste and environmental pollution.
实用新型内容Utility model content
本实用新型所要解决的技术问题是提供一种镍氢充电电池组保护电路，对电池组内的所有镍氢充电电池单元提供实时电压监控，实现过充保护、过放保护、充电均衡功能，保障电池单元之间状态一致和均衡，有效避免镍氢充电电池组经过多个充放电循环周期后容易损坏的情况。The technical problem to be solved by the utility model is to provide a Ni-MH rechargeable battery pack protection circuit, which provides real-time voltage monitoring for all Ni-MH rechargeable battery units in the battery pack, and realizes overcharge protection, over-discharge protection, and charge equalization functions to ensure The state of the battery cells is consistent and balanced, effectively avoiding the situation that the Ni-MH rechargeable battery pack is easily damaged after multiple charge and discharge cycles.
为解决上述技术问题，本实用新型采用的技术方案是：In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
一种镍氢充电电池组保护电路，镍氢充电电池组由多个镍氢电池串联，第1个镍氢电池负极连接到电压保护MOS管，所述电压保护MOS管连接到负载负极；第1个镍氢电池正负极连接到第1个均衡模块输入端，第1个均衡模块输出端连接到电池管理芯片，所述第1个镍氢电池正极连接到第1个电压采样模块的输入端，第1个电压采样模块的输出端连接到电池管理芯片；以后每一个镍氢电池正负极都连接到本个镍氢电池对应的均衡模块输入端，对应的均衡模块输出端连接到电池管理芯片，本个镍氢电池正极连接到其对应的电压采样模块的输入端，对应的电压采样模块的输出端连接到电池管理芯片；所述电池管理芯片连接到高效DC-DC转换模块，所述高效DC-DC转换模块一端接地，另一端连接到负载正极。A Ni-MH rechargeable battery pack protection circuit, the Ni-MH rechargeable battery pack is composed of a plurality of Ni-MH batteries connected in series, the negative pole of the first Ni-MH battery is connected to a voltage protection MOS tube, and the voltage protection MOS tube is connected to the load negative pole; the first The positive and negative electrodes of the first Ni-MH battery are connected to the input end of the first equalization module, the output end of the first equalization module is connected to the battery management chip, and the positive electrode of the first Ni-MH battery is connected to the input end of the first voltage sampling module , the output terminal of the first voltage sampling module is connected to the battery management chip; after that, the positive and negative poles of each Ni-MH battery are connected to the input terminal of the equalization module corresponding to this Ni-MH battery, and the corresponding output terminal of the equalization module is connected to the battery management chip. Chip, the positive electrode of this Ni-MH battery is connected to the input terminal of its corresponding voltage sampling module, and the output terminal of the corresponding voltage sampling module is connected to the battery management chip; the battery management chip is connected to a high-efficiency DC-DC conversion module, and the One end of the high-efficiency DC-DC conversion module is grounded, and the other end is connected to the positive pole of the load.
根据上述方案，一个镍氢充电电池组由4个镍氢电池组成。According to the above scheme, a Ni-MH rechargeable battery pack is composed of 4 Ni-MH batteries.
根据上述方案，每一个电压采样模块的结构一模一样；第1个电压采样模块结构为：第1个镍氢电池正极、电阻R1、电阻R2一端依次串联，电阻R2另一端接地，电阻R1和电阻R2连接处为第1个电压采用模块输出端。According to the above scheme, the structure of each voltage sampling module is exactly the same; the structure of the first voltage sampling module is: the positive electrode of the first Ni-MH battery, resistor R1, and resistor R2 are connected in series in sequence, the other end of resistor R2 is grounded, resistor R1 and resistor R2 The connection is the output terminal of the first voltage adopting module.
根据上述方案，每一个均衡模块的结构一模一样；第1个均衡模块结构为：电阻R3一端连接到第1个镍氢电池正极，另一端连接到第1个MOS管漏极，第1个MOS管源极连接到第1个镍氢电池负极，第1个MOS管栅极连接到电池管理芯片。According to the above scheme, the structure of each balance module is exactly the same; the structure of the first balance module is: one end of the resistor R3 is connected to the positive pole of the first Ni-MH battery, the other end is connected to the drain of the first MOS tube, and the first MOS tube The source is connected to the negative pole of the first Ni-MH battery, and the gate of the first MOS transistor is connected to the battery management chip.
与现有技术相比，本实用新型的有益效果是：有效避免了电池组单元过充和过放的情况，同时均衡模块还能实现单元电池之间保持动态平衡来弥补单元电池的一致性差异，从而提高电池组的工作效能和寿命，降低了使用成本，提高用户使用体验，也降低了大量废旧电池对环境的污染。Compared with the prior art, the utility model has the beneficial effects of effectively avoiding the overcharging and overdischarging of the battery pack units, and at the same time, the equalization module can also realize dynamic balance between the unit batteries to make up for the consistency difference of the unit batteries , thereby improving the working efficiency and life of the battery pack, reducing the cost of use, improving the user experience, and reducing the environmental pollution caused by a large number of waste batteries.
附图说明Description of drawings
图1为本实用新型镍氢充电电池组保护电路原理示意图图。Fig. 1 is a schematic diagram of the protection circuit principle of the utility model Ni-MH rechargeable battery pack.
图2为本实用新型中采用的电压采样模块原理图。Fig. 2 is a schematic diagram of the voltage sampling module adopted in the utility model.
图3为本实用新型中采用的均衡模块原理图。Fig. 3 is a schematic diagram of the equalization module adopted in the utility model.
图4为本实用新型可采用的一种镍氢电池管理芯片的原理框图。Fig. 4 is a functional block diagram of a nickel-metal hydride battery management chip that can be used in the present invention.
具体实施方式detailed description
下面结合附图和具体实施方式对本实用新型作进一步详细的说明。Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.
本实用新型在实际应用时，由多个电池串联构成一个电池组，电池的计数单位为“个”。镍氢电池为n个，编号范围为1开始的正整数递增：1，2，……，n。其中省略号表示多个编号从3到n-1的电池。系统框图的电池编号采用了这种方式，即图1中电池为4个，但表示的数量是可变的(1，2，……，n)。When the utility model is used in practice, a plurality of batteries are connected in series to form a battery pack, and the counting unit of the battery is "one". There are n nickel-metal hydride batteries, and the number ranges from positive integers starting with 1: 1, 2, ..., n. Wherein the ellipsis represents a plurality of batteries numbered from 3 to n-1. The battery number of the system block diagram adopts this method, that is, there are 4 batteries in Figure 1, but the number indicated is variable (1, 2, ..., n).
如图1所示，本实用新型提供的一种镍氢充电电池组保护电路，其结构为：镍氢充电电池组由多个镍氢电池串联，第1个镍氢电池负极连接到电压保护MOS管，所述电压保护MOS管连接到负载负极；第1个镍氢电池正负极连接到第1个均衡模块输入端，第1个均衡模块输出端连接到电池管理芯片，所述第1个镍氢电池正极连接到第1个电压采样模块的输入端，第1个电压采样模块的输出端连接到电池管理芯片；以后每一个镍氢电池正负极都连接到本个镍氢电池对应的均衡模块输入端，对应的均衡模块输出端连接到电池管理芯片，本个镍氢电池正极连接到其对应的电压采样模块的输入端，对应的电压采样模块的输出端连接到电池管理芯片；所述电池管理芯片连接到高效DC-DC转换模块，所述高效DC-DC转换模块一端接地，另一端连接到负载正极。As shown in Figure 1, a Ni-MH rechargeable battery pack protection circuit provided by the utility model has a structure: a Ni-MH rechargeable battery pack is connected in series with multiple Ni-MH batteries, and the negative electrode of the first Ni-MH battery is connected to the voltage protection MOS The voltage protection MOS tube is connected to the negative pole of the load; the positive and negative poles of the first Ni-MH battery are connected to the input terminal of the first balance module, and the output terminal of the first balance module is connected to the battery management chip. The positive pole of the Ni-MH battery is connected to the input terminal of the first voltage sampling module, and the output terminal of the first voltage sampling module is connected to the battery management chip; after that, the positive pole of each Ni-MH battery is connected to the corresponding Ni-MH battery. The input terminal of the equalization module, the corresponding output terminal of the equalization module is connected to the battery management chip, the positive electrode of this Ni-MH battery is connected to the input terminal of the corresponding voltage sampling module, and the output terminal of the corresponding voltage sampling module is connected to the battery management chip; The battery management chip is connected to a high-efficiency DC-DC conversion module, one end of the high-efficiency DC-DC conversion module is grounded, and the other end is connected to the positive pole of the load.
一个镍氢充电电池组由4个镍氢电池组成。A NiMH rechargeable battery pack consists of 4 NiMH batteries.
电压采样模块采用高精度电阻分压电路，如图2所示，每一个电压采样模块的结构一模一样；第1个电压采样模块结构为：第1个镍氢电池正极、电阻R1、电阻R2一端依次串联，电阻R2另一端接地，电阻R1和电阻R2连接处为第1个电压采用模块输出端。The voltage sampling module adopts a high-precision resistor divider circuit. As shown in Figure 2, the structure of each voltage sampling module is exactly the same; the structure of the first voltage sampling module is: the first Ni-MH battery positive electrode, resistor R1, and resistor R2 in sequence In series connection, the other end of the resistor R2 is grounded, and the connection between the resistor R1 and the resistor R2 is the output terminal of the first voltage adopting module.
均衡模块采用开关MOS管串联分流电阻来实现，如图3所示，每一个均衡模块的结构一模一样；第1个均衡模块结构为：电阻R3一端连接到第1个镍氢电池正极，另一端连接到第1个MOS管漏极，第1个MOS管源极连接到第1个镍氢电池负极，第1个MOS管栅极连接到电池管理芯片。The balance module is implemented by switching MOS tubes in series with shunt resistors. As shown in Figure 3, the structure of each balance module is exactly the same; the structure of the first balance module is: one end of resistor R3 is connected to the positive pole of the first Ni-MH battery, and the other end is connected to To the drain of the first MOS tube, the source of the first MOS tube is connected to the negative pole of the first Ni-MH battery, and the gate of the first MOS tube is connected to the battery management chip.
保护电路核心采用超低功耗的电池管理芯片驱动电压采样模块，持续对每个电池单元的电压进行采样。电池管理芯片根据每个单元电池的采样电压实现镍氢充电电池的过充保护、过放保护和充电均衡。The core of the protection circuit uses an ultra-low power consumption battery management chip to drive the voltage sampling module to continuously sample the voltage of each battery cell. The battery management chip realizes the overcharge protection, overdischarge protection and charge balance of the Ni-MH rechargeable battery according to the sampling voltage of each unit battery.
过充功能：当某个单元电池已经充满，且电压超过设定的过压保护值时，电池管理芯片控制保护MOS管截止关断，则外部充电电流被切断，实现过充电保护。当电池电压恢复到正常范围后，保护MOS管导通，电池组继续工作。Overcharge function: When a unit battery is fully charged and the voltage exceeds the set overvoltage protection value, the battery management chip controls the protection MOS tube to cut off, and the external charging current is cut off to realize overcharge protection. When the battery voltage returns to the normal range, the protection MOS tube is turned on, and the battery pack continues to work.
过放保护：当某个单元电池电压低于设定的低压保护值时，电池管理芯片控制保护MOS管截止关断，则停止对外部放电，实现过放保护。当电池电压恢复到正常范围后，保护MOS管导通，电池组继续工作。Over-discharge protection: When the voltage of a unit battery is lower than the set low-voltage protection value, the battery management chip controls and protects the MOS tube to shut off, and then stops discharging to the outside to realize over-discharge protection. When the battery voltage returns to the normal range, the protection MOS tube is turned on, and the battery pack continues to work.
充电均衡：保护电路为每个电池单元提供了独立的充电均衡模块。当某个电池的电压达到充满电压时，而电池组的充电电流还在持续时，图3中所示均衡模块的MOS管导通，电阻R3对该电池的充电电流进行分流，提供额外电流通路让其它未充满的电池得以继续充电，从而避免个别电池过充的情况出现，也能让整个电池组单元电池都得到充满，单元电池的不一致性得以均衡和补偿。均衡模块的MOS管截止时，分流电阻不起作用。Charge equalization: The protection circuit provides an independent charge equalization module for each battery unit. When the voltage of a battery reaches full voltage and the charging current of the battery pack continues, the MOS tube of the equalization module shown in Figure 3 is turned on, and the resistor R3 shunts the charging current of the battery to provide an additional current path Allow other batteries that are not fully charged to continue charging, thereby avoiding the occurrence of overcharging of individual batteries, and also allow the entire battery pack to be fully charged, and the inconsistency of the unit cells can be balanced and compensated. When the MOS tube of the balance module is cut off, the shunt resistor will not work.
图1中，保护电路内置高效DC-DC转换模块，将电池组电压转换为电池管理芯片的工作电压。电池管理芯片工作在低功耗模式下，对镍氢充电电池电能消耗非常低。保护MOS管选用低内阻的场效应管，其压降和功耗非常低。In Figure 1, the protection circuit has a built-in high-efficiency DC-DC conversion module, which converts the voltage of the battery pack into the working voltage of the battery management chip. The battery management chip works in low power consumption mode, and the power consumption of the Ni-MH rechargeable battery is very low. The protection MOS tube selects a field effect tube with low internal resistance, and its voltage drop and power consumption are very low.
图4中的电池管理芯片内部集成了多种功能模块，包括：The battery management chip in Figure 4 integrates a variety of functional modules, including:
1、“基准电压”模块，该模块将VDD电压变换为高精度的基准电压，作为电池管理芯片内部测量各个单元电池电压的参考基准。1. "Reference voltage" module, which converts the VDD voltage into a high-precision reference voltage, which is used as a reference standard for measuring the voltage of each unit battery inside the battery management chip.
2、COMP是电压比较器模块，每个单元镍氢充电电池对应1个共3个电压比较器，分别是欠压比较器、充满比较器、过压比较器。当电池电压在不同范围时，三个电压比较器分别输出单元镍氢充电电池的电压状态逻辑信号。2. COMP is a voltage comparator module. Each unit of Ni-MH rechargeable battery corresponds to a total of 3 voltage comparators, which are undervoltage comparator, full comparator and overvoltage comparator. When the battery voltage is in different ranges, the three voltage comparators respectively output the voltage state logic signal of the unit Ni-MH rechargeable battery.
3、“电池电压测量、欠压、过压、均衡”模块是电池管理芯片的重要功能模块，通过周期性地采集每个单元镍氢充电电池的电压状态逻辑信号，按照电池组管理逻辑，驱动对应的BLx和ON/OFF引脚，实现镍氢充电电池组的欠压保护、过压保护、充电均衡等功能。镍氢电池管理芯片各引脚功能如表1。3. The "battery voltage measurement, undervoltage, overvoltage, equalization" module is an important functional module of the battery management chip. It periodically collects the voltage state logic signal of each unit Ni-MH rechargeable battery, and drives the battery according to the battery pack management logic. The corresponding BLx and ON/OFF pins realize the under-voltage protection, over-voltage protection, charge equalization and other functions of the Ni-MH rechargeable battery pack. The functions of each pin of the Ni-MH battery management chip are shown in Table 1.
表1镍氢电池管理芯片引脚功能表Table 1 Ni-MH battery management chip pin function table
图4所述的镍氢充电电池管理芯片是本实用新型可选择的芯片之一。The nickel-metal hydride rechargeable battery management chip described in FIG. 4 is one of the optional chips of the present invention.
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| CN108494062A (en) * | 2018-05-18 | 2018-09-04 | 深圳市海雷新能源有限公司 | A kind of intelligent balanced double charging sources |
| CN111404220A (en) * | 2020-03-18 | 2020-07-10 | 珠海迈巨微电子有限责任公司 | Battery management chip, battery management system, electronic equipment and power supply method |
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| CN108494062A (en) * | 2018-05-18 | 2018-09-04 | 深圳市海雷新能源有限公司 | A kind of intelligent balanced double charging sources |
| CN111404220A (en) * | 2020-03-18 | 2020-07-10 | 珠海迈巨微电子有限责任公司 | Battery management chip, battery management system, electronic equipment and power supply method |
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