TWI572114B - The cable and the battery module using the cable are fully balanced - Google Patents

Description

Cable line and battery module using the cable line balancing system

The invention relates to a cable line and a battery module balancing and charging system using the same, in particular, a battery capable of fully charging the battery cells in the battery module, thereby improving the use efficiency and extending the battery module. The service life.

The Battery Management System (BMS) is an essential core system for electric vehicles. It is responsible for the safety monitoring and management of battery modules to improve the efficiency and reliability of battery modules and extend battery modules. The service life. The battery management system mainly includes a battery management unit (BMU) and a battery control unit (BCU). The battery module management unit (BMU) can transmit relevant information through various communication protocols and transmit information to the battery module control unit (BCU) to manage, alert and secure the battery module.

When the electric vehicle is started and the battery modules connected in series are repeatedly charged and discharged, the voltage difference and the capacity unevenness between the battery cores may occur, which may make the use efficiency of the battery module worse, and may also cause the battery. The life of the module is attenuated. In addition to monitoring the state of the battery cells, the Battery Management Unit (BMU) can also perform active or passive battery balancing to compensate for slight cell mismatches to extend the life of the battery module.

The balance control circuit of the battery module management unit (BMU) is mainly divided into passive balance and active balance. Among them, passive balance is the energy of the battery with higher voltage Work directly on the load resistor to convert excess energy into heat. This method is only suitable for suppressing the voltage rise of the strongest battery core in the charging mode to limit power loss. For a combination of a plurality of battery modules, when one of the battery cells is fully charged, the system will display that the charging is completed, but in reality, there may still be multiple battery cells in a state of insufficient power, therefore, To make the battery cells charge on average, it consumes a lot of energy.

The active balance system transfers the excess energy of a plurality of higher voltage battery cells one by one to other battery cores with lower voltages. However, when adjusting the charge amount of each battery cell with multiple switching circuits, too many switches will reduce the reliability. If the switch produces a short circuit, it will cause the battery core to be overcharged and even burned. Therefore, the above two battery balancing management modes have room for improvement in terms of balance efficiency, manufacturing cost, and reliability.

In view of the above, in order to provide a structure different from the conventional technology and to improve the above disadvantages, the inventors have accumulated many years of experience and continuous development and improvement, and the present invention has been produced.

The main purpose of the present invention is to provide a battery charger and a battery module, and monitor the battery power of the battery module through the battery monitoring unit of the equalizer, and then use the charging unit of the equalizer respectively. The battery cable for charging the battery with low power and the battery module using the cable are all balanced and balanced, so that the conventional battery module needs to be equipped with an active or passive battery balancing circuit to increase the manufacturing cost and cannot effectively achieve Balanced efficiency and insufficient safety and reliability can effectively improve balance efficiency to extend service life, reduce costs, and ensure safe use.

For the above purposes, the cable system of the present invention includes a first connector, A second connector, a plurality of array charging lines, and an outer cladding layer. The first connector is provided with a plurality of first pins; the second connector is provided with a second array of multiple pins; and the two ends of each of the plurality of charging lines are electrically connected to the group a pin and the second pin of the set; and the outer cover is coated with a plurality of charging lines.

The battery module equalization and balance system using the above cable includes a cable, a leveling device and a battery module. Wherein, the equalizer comprises a casing, the casing is provided with a plurality of charging units, and a first connecting end is arranged on one side of the casing, and the first connecting end is connected with the first joint, so that the first array is connected Each of the legs is electrically connected to a plurality of charging units to respectively output power; and the battery module includes a plurality of battery cells juxtaposed, and one side of the battery module is provided with a second connecting end, the second connecting end and the second connecting end The connector is connected, so that the second pin of the complex array is electrically connected to the plurality of battery cells to respectively input power, and the plurality of battery cells are respectively charged.

In implementation, the plurality of charging units are connected in series with each other.

In implementation, the present invention further includes a first-time control unit that connects the plurality of charging units to equalize the voltage of the average plurality of charging units.

In implementation, the equalizer further comprises a plurality of battery monitoring units, wherein the plurality of battery monitoring units are electrically connected to the plurality of battery cells for separately monitoring the power of each battery cell, and the plurality of battery monitoring units respectively and the plurality of charging units The unit is electrically connected to control a plurality of charging units for respectively charging the corresponding battery cells.

In order to further understand the present invention, the specific embodiments of the present invention and the effects achieved thereby are described in detail below with reference to the drawings and drawings.

1‧‧‧ cable

11‧‧‧First joint

111‧‧‧First pin

12‧‧‧second joint

121‧‧‧Second pin

13‧‧‧Charging line

14‧‧‧Overcoat

2‧‧‧Battery module equalization and balance system

3‧‧‧ battery module

31‧‧‧ battery core

32‧‧‧second connection

321‧‧‧Second jack

4‧‧‧Finer

41‧‧‧Shell

411‧‧‧ first connection

412‧‧‧First jack

42‧‧‧Charging unit

43‧‧‧ Equalization control unit

44‧‧‧Battery monitoring unit

441‧‧‧Monitoring unit

442‧‧‧Control unit

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view showing a preferred embodiment of the cable of the present invention.

Fig. 2 is an exploded view of the preferred embodiment of the battery module equalization and balance system using the cable of the present invention.

Figure 3 is a block diagram showing the circuit of the battery module equalization and balance system using the cable of the present invention.

Referring to FIG. 1, a preferred embodiment of the cable 1 of the present invention includes a first connector 11, a second connector 12, a plurality of array charging lines 13, and an outer cladding 14.

The first connector 11 is provided with a plurality of first pins 111, and any of the first pins 111 includes two separate first pins 111; the second connector 12 is opposite to the first connector 11, second The connector 12 is provided with a plurality of second pins 121, and any of the second pins 121 includes two separate second pins 121; any one of the plurality of charging lines 13 of the plurality of charging lines 13 includes two separate charging a line 13 , wherein one of the two charging lines 13 of each group of charging lines 13 is electrically connected to two first pins 111 of the corresponding group of first pins 111 of the corresponding group, and the other ends of the two charging lines 13 respectively The two second pins 121 of the second pin 121 of the corresponding group of the corresponding group are electrically connected to each other such that a first pin 111, a charging line 13 and a second pin 121 are connected in series. The outer cover 14 is coated on the outer periphery of all the charging wires 13.

As shown in FIGS. 2 and 3, the battery module equalization and balance system 2 using the cable 1 includes the cable 1, the battery module 3, and a equalizer 4.

The battery module 3 includes a plurality of battery cells 31 juxtaposed. One side of the battery module 3 is provided with a second connecting end 32. The second connecting end 32 is provided with a plurality of second connections with the cable 1. The corresponding number of the second jacks 321 of the head 12 is used to electrically connect the second array pins 121 of the second array 12 of the cable 1 to the plurality of cells. 31.

The equalizer 4 includes a housing 41, a plurality of charging units 42, an equalization control unit 43, and a plurality of battery monitoring units 44. The housing 41 has a rectangular parallelepiped shape and has a receiving space therein for accommodating and positioning a plurality of charging units 42, an equalization control unit 43, and a plurality of battery monitoring units 44. A first connecting end 411 is disposed on a side of the housing 41. The first connecting end 411 is provided with a plurality of first jacks corresponding to the plurality of first pins 111 of the first connector 11 of the cable 1 412. After the first pin 111 of the first array 11 of the cable 1 is correspondingly inserted, the first pin 111 of the complex array is electrically connected to the plurality of charging units 42 respectively.

The charging unit 42 is a battery, a plurality of charging units 42 are connected in series, and a plurality of charging units 42 are connected to the equalization control unit 43 to equalize the voltage of the average plurality of charging units 42 by equalizing the control unit 43. The positive and negative poles of the plurality of charging units 42 are concentrated on the first connecting end 411 of the housing 41, and the plurality of charging units 42 are respectively electrically connected to the plurality of battery cells 31 in the battery module 3 via the connection of the cable 1. The connection is made, and the positive and negative poles of one charging unit 42 are connected to the positive and negative poles of one battery core 31.

The battery monitoring unit 44 has a monitoring unit 441 and a control unit 442. One of the battery monitoring units 44 of the plurality of battery monitoring units 44 corresponds to one of the plurality of battery cells 31, and the plurality of battery monitoring units 44 are electrically connected to the plurality of battery cells 31 for monitoring the phases respectively. Corresponding to the amount of electricity of the battery core 31. The plurality of control units 442 are electrically connected to the plurality of charging units 42 respectively, thereby controlling the plurality of charging units 42 to charge the corresponding battery cells 31 respectively.

Thereby, when the first connector 11 of the cable 1 is connected to the first connection end 411 of the equalizer 4, and the second connector 12 of the cable 1 is connected to the second connection end 32 of the battery module 3, the complex array can be made. The first pin 111 is electrically connected to the plurality of charging units 42 to respectively output electric power, and then the electric power is respectively input through the second array 121 of the plurality of arrays, and the plurality of battery cells 31 are individually charged.

Therefore, the present invention has the following advantages:

1. The plurality of charging units of the present invention can respectively charge a plurality of battery cells via a complex array of charging lines of the cable, thereby effectively and effectively achieving the effect of uniformly charging the respective battery cells.

2. The invention monitors the power of the battery cells in each battery module through the battery monitoring unit, and then separately charges the battery cells with low power consumption by the charging unit, thereby not only effectively improving the balance efficiency but also prolonging the battery module. The service life, and because the battery module does not need to be equipped with active or passive battery balancing circuit, can reduce production costs and ensure safe use.

3. In the present invention, a plurality of charging cells are individually charged for a plurality of battery cells whose electric quantity is too low, and the voltage of the average plurality of charging units is equalized by the equalization control unit, thereby effectively improving charging efficiency and service life. .

In summary, according to the above disclosure, the present invention can achieve the intended purpose, providing an average of not only a reliable and effective filling of the battery cells, but also improving the balance efficiency to extend the battery module and the charging unit. The service life can reduce the production cost, and it can ensure the safe use of the cable and the battery module that uses the cable to balance the system, which is of great value in the industry.

1‧‧‧ cable

11‧‧‧First joint

12‧‧‧second joint

2‧‧‧Battery module equalization and balance system

3‧‧‧ battery module

32‧‧‧second connection

321‧‧‧Second jack

4‧‧‧Finer

41‧‧‧Shell

411‧‧‧ first connection

412‧‧‧First jack

Claims (5)

A cable wire includes: a first connector, which is provided with a first array of first pins, and any of the first pins includes two separate first pins for respectively transmitting DC positive and negative power; The connector is provided with a second array of complex arrays, and any of the second pins includes two separate second pins for respectively transmitting DC positive and negative charges; a complex array of charging lines, wherein each of the two charging lines The terminals are electrically connected to the first pin of the group and the second pin of the group, so that a first pin, a charging wire and a second pin are connected in series; and an outer covering layer is coated The complex array of charging lines. A battery module equalization and balance system using the cable of claim 1, comprising: a cable; a leveling device comprising a housing, wherein the housing is provided with a plurality of charging units, the housing a first connecting end is connected to the first connector, and the first connecting end is electrically connected to the plurality of charging units to respectively output power; and a battery The module includes a plurality of battery cells juxtaposed, and a second connection end is disposed on one side of the battery module, and the second connection end is connected to the second connector, so that the second pin of the multiple array is respectively electrically charged The plurality of battery cells are connected to each other to input power, and the plurality of battery cells are respectively charged. The battery module of claim 2, wherein the plurality of charging units are connected in series with each other. The battery module equalization and balance system of the cable of claim 3, further comprising a first-time control unit, wherein the equalization control unit is connected to the plurality of charging units for equalizing the plurality of charging The voltage of the unit. The battery module balancing and balancing system of the cable of claim 2, wherein the equalizing device further comprises a plurality of battery monitoring units, wherein the plurality of battery monitoring units are electrically connected to the plurality of battery cells The plurality of battery monitoring units are electrically connected to the plurality of charging units, respectively, to control the plurality of charging units, and respectively charge the corresponding battery cells.