CN110936853A

CN110936853A - Battery balancing device with multiple motor-driven batteries, balancing method and electric vehicle

Info

Publication number: CN110936853A
Application number: CN201811110336.8A
Authority: CN
Inventors: 余晓华; 胡林玉; 王海洋
Original assignee: Chongqing Guangyiyuan Battery Co Ltd
Current assignee: Chongqing Guangyiyuan Battery Co Ltd
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2020-03-31
Anticipated expiration: 2038-09-21
Also published as: CN110936853B

Abstract

The application provides a battery balancing device with a plurality of mobile batteries, a balancing method and an electric vehicle, wherein the battery balancing device at least comprises: the monitor is used for respectively acquiring the electric quantity information of the plurality of batteries; the first equalizing assembly and the second equalizing assembly are respectively used for equalizing the electric quantity of the plurality of batteries; the controller is used for acquiring a first to-be-equalized battery and a second to-be-equalized battery of which the electric quantity information is smaller than the preset electric quantity information according to the electric quantity information of the battery, controlling the first equalizing assembly to perform electric quantity information equalization on the first to-be-equalized battery, and controlling the second equalizing assembly to perform electric quantity information equalization on the second to-be-equalized battery. Through the mode, the electric quantity information of the batteries can be balanced, so that the electric quantity information of the battery pack with serious cracking is balanced, the electric energy waste can be avoided, and the electric quantity of the original battery pack is kept.

Description

Battery balancing device with multiple motor-driven batteries, balancing method and electric vehicle

Technical Field

The application relates to the technical field of battery equalization, in particular to a battery equalization device with a plurality of mobile batteries, an equalization method and an electric vehicle.

Background

Both electric vehicles and hybrid vehicles require a battery pack as an energy storage system. A battery pack is generally composed of a plurality of batteries connected in series. The inconsistency in the amount of remaining power between the series-connected batteries may occur due to various factors during the manufacturing process and during use of the batteries. The imbalance between the cells may reduce the available capacity of the entire battery pack.

The inventor of this application is at long-term research and development in-process, and present group battery is balanced can only carry out the electric quantity to a small number of batteries in the group battery and is balanced, and is more serious at the group battery cracking, and when a plurality of batteries need carry out the electric quantity equilibrium, can not reach obvious electric quantity balanced effect, and present group battery is balanced to need to discharge the battery that the electric quantity is high or balance the battery that the electric quantity is high and the battery that the electric quantity is low, extravagant electric energy, can not resume the electric quantity of former group battery.

Disclosure of Invention

The technical problem mainly solved by the application is to provide a battery balancing device with a plurality of mobile batteries, a balancing method and an electric vehicle, so that the electric quantity information of the plurality of batteries is balanced, the electric energy waste is avoided, and the electric quantity of a primary battery pack is kept.

In order to solve the above technical problem, the present application provides a battery balancing apparatus having a plurality of mobile batteries, the battery balancing apparatus being used for an electric vehicle, the electric vehicle including a battery pack and a battery balancing apparatus, the battery pack including a plurality of batteries connected in series, the battery balancing apparatus at least including: the monitor is used for respectively acquiring the electric quantity information of the plurality of batteries; the first equalizing assembly and the second equalizing assembly are respectively used for equalizing the electric quantity of the plurality of batteries; the controller is used for acquiring a first to-be-equalized battery and a second to-be-equalized battery of which the electric quantity information is smaller than the preset electric quantity information according to the electric quantity information of the battery, controlling the first equalizing assembly to perform electric quantity information equalization on the first to-be-equalized battery, and controlling the second equalizing assembly to perform electric quantity information equalization on the second to-be-equalized battery.

Wherein the first equalization component comprises: the first mobile battery and the first switch assembly are coupled with the controller, one end of the first switch assembly is connected with the first mobile battery, and the other end of the first switch assembly is connected with the battery; the second balancing component comprises a second mobile battery and a second switch component, one end of the second switch component is connected with the second mobile battery, and the other end of the second switch component is connected with the battery; the controller controls the first switch assembly to connect the first mobile battery and the first battery to be equalized so that the first mobile battery can equalize the electric quantity of the first battery to be equalized, and controls the second switch assembly to connect the second mobile battery and the second battery to be equalized so that the second mobile battery can equalize the electric quantity of the second battery to be equalized.

The first equalizing assembly is provided with a first inserting port, the second equalizing assembly is provided with a second inserting port, and the first inserting port and the second inserting port are connected so as to enable the first equalizing assembly and the second equalizing assembly to be arranged in a laminated mode.

The first switch assembly comprises a plurality of first terminals, second terminals, a contact disc and movable pointers, the second terminals are arranged in the middle area of the contact disc, the first terminals are distributed on the outer side of the middle area in an arrayed mode, one ends of the movable pointers are connected with the second terminals, and when the controller controls the switch assembly to connect the motorized battery and the battery to be balanced, the other ends of the movable pointers rotate to the first terminals connected with the battery to be balanced, so that the second terminals are connected with the first terminals.

The first terminals of the first switch assembly and the first terminals of the second switch assembly are arranged correspondingly.

The first equalizing assembly further comprises a shell and a fixed plate, wherein the contact disc is arranged at the bottom of the shell, the fixed plate is fixed on the shell through a rotating shaft, the movable pointer is arranged on the fixed plate, and the other end of the movable pointer is arranged on the surface, close to the contact disc, of the fixed plate; the first equalizing assembly further comprises a motor, a spring and a connecting piece, wherein the motor is respectively connected with the controller and the connecting piece, and the spring is arranged between the contact disc and the fixing plate; the controller controls the motor to work, the motor drives the connecting piece to be connected with the fixed plate, and the connecting piece drives the fixed plate to rotate under the driving of the motor, so that the other end of the movable pointer rotates to a first terminal connected with the battery to be balanced; the first equalizer assembly further includes a detent switch disposed on a side wall of the housing and corresponding to the fixing plate, the detent switch for holding the fixing plate in a selected one of the directions and positioning the fixing plate.

Wherein the first equalization component comprises: first motor-driven battery, casing, battery compartment, motor, connecting piece, contact disc, fixed plate and pawl, wherein, the battery compartment is used for the first motor-driven battery of holding, and the motor passes through the connecting rod to be connected with the connecting piece, and the connecting piece is kept away from one side of motor is provided with the inclined plane and touches the foot, and the fixed plate is provided with the through-hole, and the through-hole is used for holding the inclined plane and touches the foot, and one side that the connecting piece was kept away from to the fixed plate is provided with the shell fragment, and the bottom of casing is provided with a spacing axle.

The first switch assembly comprises first terminals, a guide rail, second terminals and a connecting piece, wherein the first terminals, the guide rail, the second terminals and the connecting piece are arranged in a linear mode; when the controller controls the first switch assembly to connect the first power battery and the first battery to be equalized, the connecting piece moves along the guide rail, so that the other end of the connecting piece is connected with the first terminal connected with the first battery to be equalized.

In order to solve the technical problem, the application also provides a battery pack balancing method. The battery equalization method is used for equalizing electric quantity information of a battery pack by a battery equalization device, the battery pack comprises a plurality of batteries which are connected in series, the battery equalization device is used for equalizing the electric quantity of the batteries, the battery equalization device at least comprises a monitor, a first equalization assembly, a second equalization assembly and a controller, and the battery equalization method comprises the following steps: the controller acquires the electric quantity information of the plurality of batteries through the monitor; the controller compares the electric quantity information with preset electric quantity information to obtain a first battery to be equalized and a second battery to be equalized, wherein the electric quantity information is smaller than the preset electric quantity information; the controller controls the first balancing assembly to balance the electric quantity of the first battery to be balanced and controls the second balancing assembly to balance the electric quantity of the second battery to be balanced.

In order to solve the technical problem, the application further provides an electric vehicle which comprises a battery pack and the battery balancing device.

Compared with the prior art, the beneficial effects of this application are: the embodiment of the application provides a battery balancing device and a balancing method for a plurality of motor-driven batteries, and an electric vehicle, wherein the battery balancing device is used for the electric vehicle, the electric vehicle comprises a battery pack and a battery balancing device, the battery pack comprises a plurality of batteries connected in series, and the battery balancing device at least comprises: the monitor is used for respectively acquiring the electric quantity information of the plurality of batteries; the first equalizing assembly and the second equalizing assembly are respectively used for equalizing the electric quantity of the plurality of batteries; the controller is used for acquiring a first to-be-equalized battery and a second to-be-equalized battery of which the electric quantity information is smaller than the preset electric quantity information according to the electric quantity information of the battery, controlling the first equalizing assembly to perform electric quantity equalization on the first to-be-equalized battery, and controlling the second equalizing assembly to perform electric quantity equalization on the second to-be-equalized battery. In this way, this application embodiment can treat through two at least balanced subassemblies to two at least and equalize electric quantity information to carry out electric quantity information equalization to the group battery that splits seriously, simultaneously, this application embodiment can monitor the electric quantity information of battery, and carry out the equilibrium to the electric quantity information of battery when the electric quantity information of battery is less than predetermined electric quantity information, consequently can avoid extravagant electric energy, keep the electric quantity of primary battery group.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a diagram illustrating the structure of a first embodiment of a battery equalization apparatus having a plurality of mobile batteries according to the present application

A schematic diagram;

fig. 2 is a schematic flow chart of an embodiment of a battery equalization method according to the present application;

FIG. 3 is a schematic diagram of a part of the structure of the battery equalization device in the embodiment of FIG. 1;

fig. 4 is a schematic structural view of the battery pack of fig. 1;

FIG. 5 is a schematic diagram of a first equalization assembly in a battery equalization apparatus having a plurality of motorized batteries according to the present application

The structure of the second embodiment is schematically shown;

FIG. 6 is a schematic diagram of the first switch assembly of the embodiment of FIG. 5;

FIG. 7 is a schematic flow chart diagram illustrating another embodiment of a battery equalization method of the present application;

FIG. 8A is a first equalizing assembly in the battery equalizing device with multiple motorized batteries of the present application

The structure of the third embodiment is schematically shown;

FIG. 8B is a schematic diagram of a specific structure of the contact disk in the embodiment of FIG. 8A;

FIG. 8C is a schematic structural diagram of the fixing plate in the embodiment of FIG. 8A;

FIG. 8D is a schematic view showing a detailed structure of the connecting member in the embodiment of FIG. 8A;

FIG. 8E is a left side view of the attachment of the embodiment of FIG. 8C;

FIG. 8F is an elevation view of the connector of the embodiment of FIG. 8C;

FIG. 8G is a schematic diagram of the connection of the motorized batteries to the battery pack of the embodiment of FIG. 8A;

FIG. 9 is a schematic structural diagram of a fourth embodiment of a first equalization assembly of the present application;

FIG. 10 is a schematic structural diagram of a fifth embodiment of a first equalization assembly of the present application;

fig. 11 is a schematic structural diagram of an embodiment of the electric vehicle according to the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of a battery balancing apparatus having a plurality of mobile batteries according to the present application; fig. 2 is a schematic flowchart of an embodiment of a battery equalization method according to the present application. The battery equalization apparatus 101 of the present embodiment is used for an electric vehicle, the electric vehicle includes a battery pack 102 and a battery equalization apparatus 103 having a plurality of mobile batteries, the battery pack 102 includes a plurality of batteries 104 connected in series, the battery equalization apparatus 103 of the present embodiment at least includes: the system comprises a monitor 105, a first equalization component 106, a second equalization component 107 and a controller 108, wherein the monitor 105 is used for respectively acquiring the electric quantity information of the plurality of batteries 104; the first equalizing component 106 and the second equalizing component 107 are respectively used for equalizing the electric quantity of the plurality of batteries 104; the controller 108 is connected to the monitor 105, the first equalizing component 106, and the second equalizing component 107, respectively, and the controller 108 is configured to obtain a first battery to be equalized and a second battery to be equalized, which have electric quantity information smaller than preset electric quantity information, according to the electric quantity information of the battery 104, control the first equalizing component 106 to perform electric quantity equalization on the first battery to be equalized, and control the second equalizing component 107 to perform electric quantity equalization on the second battery to be equalized.

The information about the power level of the battery 104 may specifically include at least one of a remaining power level of the battery 104, a battery voltage, a battery output voltage, or a battery output current.

The battery equalization method shown in fig. 2 can be applied to the battery equalization apparatus 103 shown in fig. 1, and the method of the present embodiment includes the following steps:

step S201: the controller 108 acquires information on the charge levels of the plurality of batteries 104 through the monitor 105.

Wherein, after the battery pack 102 completes the charging or discharging process, the monitor 105 monitors the power information of each battery 104 in real time. Specifically, the controller 108 controls the monitor 105 to monitor the charge amount information of each battery 104 after receiving the information that the battery pack 102 is completely charged or discharged, and acquires the charge amount information of each battery 104 from the monitor 105.

Step S202: the controller 108 compares the electric quantity information with the preset electric quantity information to obtain a first battery to be equalized and a second battery to be equalized, wherein the electric quantity information is smaller than the preset electric quantity information.

The controller 108 is preset with power information, and the controller 108 acquires the power information of each battery 104 from the monitor 105 and compares the power information of each battery 104 with the power information, for example, the controller 108 compares the remaining power of each battery 104 with the power information.

If the controller 108 determines that the electric quantity information is smaller than the electric quantity information, the controller 108 marks the battery 104 with the electric quantity information smaller than the electric quantity information as a first battery to be equalized and/or a second battery to be equalized to obtain the first battery to be equalized and the second battery to be equalized, and then step S203 is performed. If the controller 108 determines that the power information is greater than or equal to the power information, the controller 108 determines that each battery 104 does not need to be equalized, and the process is ended.

Step S203: the controller 108 controls the first equalizing assembly 105 to equalize the electric quantity of the first battery to be equalized and controls the second equalizing assembly 106 to equalize the electric quantity of the second battery to be equalized.

Of course, in other embodiments, the electric quantity information of more than two batteries to be equalized can be equalized by more than two equalizing assemblies respectively.

Be different from prior art, the battery balancing unit that this embodiment has a plurality of mobile batteries can carry out the electric quantity through two at least equalizing assembly to waiting to equalize the battery to at least two, can carry out electric quantity information equalization to the serious group battery of cracking, and simultaneously, this embodiment can monitor the electric quantity information of battery to when the electric quantity information of battery is less than predetermined electric quantity information, balance the electric quantity information of battery, consequently can avoid extravagant electric energy, keep the electric quantity of former group battery.

Alternatively, as shown in fig. 3 and 4, fig. 3 is a schematic view of a partial structure of the battery balancing device in the embodiment of fig. 1; fig. 4 is a schematic structural view of the battery pack of fig. 1. The first equalizing component (not shown) of this embodiment includes: a first mobile battery 301 and a first switch assembly 302, wherein the first mobile battery 301 and the first switch assembly 302 are coupled to the controller 108, one end of the first switch assembly 302 is connected to the first mobile battery 301, and the other end of the first switch assembly 302 is connected to the battery 104, that is, the other end of the switch assembly 302 can be selectively connected to at least one of the plurality of batteries 104.

The controller 108 controls the first switch assembly 301 to connect the first motorized battery 302 and the first battery 303 to be equalized, so that the first motorized battery 302 performs electric quantity equalization on the first battery 303 to be equalized, and the controller 108 controls the second switch assembly to connect the second motorized battery and the second battery to be equalized, so that the second motorized battery performs electric quantity equalization on the second battery to be equalized.

Specifically, the first equalizing component 106 of this embodiment may perform power equalization on the first battery to be equalized 303 by using the following method: when the controller 108 acquires the first battery to be equalized 303 by the above method, the controller 108 controls the first switch assembly 302 to be turned on by the control instruction, that is, one end of the first switch assembly 302 is connected to the other end, so as to connect the first motor battery 301 to the first battery to be equalized 303. For example, one end of the first switch assembly 302 includes a first connection end and a second connection end, the other end of the first switch assembly 302 includes a third connection end and a fourth connection end, the first connection end and the second connection end are respectively connected with two ends of the first mobile battery 301, and the third connection end and the fourth connection end are respectively connected with two ends of the first battery to be equalized 303; when one end and the other end of the first switch module 302 are connected, that is, the first connection end is connected to the third connection end, and the second connection end is connected to the fourth connection end.

When the first mobile battery 301 and the first battery to be equalized 303 are connected, the first mobile battery 301 and the first battery to be equalized 303 are equalized, and since the electric quantity of the first mobile battery 301 is greater than the electric quantity of the first battery to be equalized 303, the electric quantity information of the equalized first battery to be equalized 303 may be greater than or equal to the first electric quantity information.

Further, when the controller 108 determines that the power information is greater than or equal to the first power information, the controller 108 controls the first switch assembly 302 to disconnect the first motorized battery 301 and the first battery to be equalized 303, that is, after the first battery to be equalized 303 completes equalization through the first motorized battery 301, the controller 108 controls one end and the other end of the first switch assembly 302 to be disconnected, so that the first motorized battery 301 and the first battery to be equalized 303 are disconnected.

The monitor 105 is connected to the controller 108, and the monitor 105 is used for monitoring each battery 104 to obtain the power information of each battery 104. Wherein the monitor 105 may be connected to the positive and negative electrodes of each battery 104, respectively. The controller 108 may be a Battery Management System (BMS) or a microcontroller.

Optionally, in the present embodiment, a first plug port 109 is provided at the first equalizing component 106, a second plug port 110 is provided at the second equalizing component 107, and the first plug port 109 and the second plug port 110 are connected to stack the first equalizing component 106 and the second equalizing component 107.

By this arrangement, the battery equalization device 103 can be downsized and the integration thereof can be improved.

Alternatively, as shown in fig. 5 and 6, fig. 5 is a schematic structural diagram of a second embodiment of a first balancing assembly in the battery balancing device with multiple motorized batteries according to the present application; fig. 6 is a schematic structural diagram of the first switch assembly in the embodiment of fig. 5. The first switch assembly 601 of this embodiment at least includes a first terminal 602 and a second terminal 603, the first terminals 602 are respectively connected to two ends of the plurality of cells 104, the second terminal 603 is connected to two ends of the first mechanical cell 501, and a controller (not shown) acquires a first contact 602 corresponding to a first cell to be equalized (not shown) according to the position information and connects the first terminal 602 and the second terminal 603, so that the first mechanical cell 501 and the first cell to be equalized are connected.

In this embodiment, the first equalizing component 106 may perform power equalization on the first battery to be equalized by using the method shown in fig. 7, where the method of this embodiment includes the following steps:

s701: the controller acquires position information of a first battery to be equalized.

Since the battery pack includes a plurality of batteries connected in series, the controller acquires position information of the first battery to be equalized when the controller acquires the first battery to be equalized. For example, each battery is correspondingly provided with a number, and the controller can obtain the position information of the first battery to be equalized according to the number, so that the controller can accurately control the first switch assembly to connect the first mobile battery and the first battery to be equalized.

S702: the controller acquires a first terminal connected with a first battery to be equalized according to the position information, and controls a second terminal of the first switch assembly to be connected with the first terminal, and the second terminal is further connected with the first motor battery.

The first switch assembly 601 includes at least a first terminal 602 and a second terminal 603, the first terminals 602 are respectively connected to two ends of the plurality of cells, and the second terminal 603 is connected to two ends of the first motor cell 501. The controller obtains the first terminal 602 corresponding to the first cell to be equalized according to the position information, and connects the first terminal 602 with the second terminal 603, so that the first motor cell 501 and the first cell to be equalized are connected.

The controller of this embodiment obtains the corresponding first terminal 602 according to the position information of the first battery to be equalized, and can realize positioning and improve accuracy.

Specifically, the first switch assembly 601 of the present embodiment includes at least a plurality of first terminals 602, second terminals 603, a contact disc 604, and a movable finger 605, wherein the first terminals 602 and the second terminals 603 are disposed on the contact disc 604. The second terminals 603 are disposed in the middle area of the contact disc 604, that is, the second terminals 603 are disposed at the center of the contact disc 604, the number of the second terminals 603 may be two, and the two second terminals 603 are respectively connected to two ends of the balancing battery. The plurality of first terminals 602 are arranged outside the middle region of the distributed contact disk 503, that is, the plurality of first terminals 602 are arranged along the edge of the contact disk 604. One end of the movable pointer 605 is connected to the second terminal 603, and the other end of the movable pointer 605 may be selectively connected to the first terminal 602.

If the controller determines that the power information is greater than or equal to the power information, the controller controls the other end of the movable pointer 605 to be suspended, so that the first terminal 602 and the second terminal 603 are disconnected. Wherein the controller controls the movable pointer 605 to be set at the first position, and the other end of the movable pointer 605 is floated. When the second terminal 603 and the first terminal 602 are connected, the controller controls the movable pointer 605 to be disposed at a second position, wherein the first position is located above the second position.

Optionally, the first equalizing assembly of the present embodiment further comprises a housing 502, a motor 503, a spring 504, a connecting member 505, a fixing plate 506, and a detent switch 507. Wherein the movable pointer 605 is disposed on the fixed plate 506, the fixed plate 506 is fixed on the housing 502 through a rotation shaft, the second terminal 603 is disposed on the rotation shaft, one end of the movable pointer 605 is connected to the second terminal 603, and the other end of the movable pointer 605 is disposed on a surface of the fixed plate 506 near the contact disc 604. A contact puck 604 is fixedly disposed at the bottom of the housing 502 and a spring 504 is disposed between the contact puck 604 and a retainer plate 506. A click switch 507 is provided on a side wall of the housing 502 in correspondence with the fixing plate 506, and the click switch 507 serves to hold the fixing plate 506 in one direction selected and to position the fixing plate 506.

The motor 503 is arranged above the contact disc 604, the first motive battery 501 is arranged inside the housing 502, and the first motive battery 501 is located above the motor 503 for supplying power to the motor 503. The controller and monitor may further be located with the motor 503 and the motor 503 is connected to the controller for controlling the operation of the motor 503. In other embodiments, the controller and the monitor may also be disposed outside the housing 502, and will not be described herein. The rotating rod of the motor 503 is connected with the connecting member 505, and when the motor 503 works, the connecting member 505 is driven to rotate.

When the controller determines that the power information is greater than or equal to the first power information, that is, the battery does not need to be equalized, the motor 503 stops working, the connecting member 505 is separated from the fixing plate 506 at this time, the fixing plate 506 is separated from the contact disc 604 by a certain distance under the action of the spring 504, the movable pointer 605 is disposed at the second position, and the other end of the movable pointer 605 located on the fixing plate 506 is suspended, so that the first terminal 602 and the second terminal 603 are disconnected.

When the controller judges that the electric quantity information is smaller than the first electric quantity information, the controller controls the motor 503 to work, the connecting piece 505 is connected with the fixed plate 506 under the action of the motor 503, drives the fixed plate 506 to rotate, and rotates the other end of the movable pointer 605 to the position above the first terminal of the first battery to be equalized according to the position information. The controller further pushes the connection member 505 and the fixing plate 506, and the movable pointer 605 is set at the first position, so that the other end of the movable pointer 605 at the fixing plate 506 abuts against the first terminal, thereby realizing the connection between the first motor cell 501 and the first cell to be equalized.

The embodiment has a simple structure and a small volume, and can ensure the battery balance performance, and simultaneously realize that the movable pointer 605 is connected with the terminal corresponding to the first battery to be balanced on the contact disc 604 without dragging, so that the movable pointer 605 is prevented from rubbing multiple times when selecting the terminal, and the service life of the movable pointer 605 is further prolonged.

Further, the first equalizer assembly of the present embodiment further includes a socket 508 for the first equalizer assembly to be plugged into another equalizer assembly.

The number of the first terminal, the second terminal and the movable pointer 605 in this embodiment is set in a one-to-one correspondence. For example, two first terminals are respectively connected to two ends of the first cell to be equalized, two corresponding second terminals are respectively connected to two ends of the first motor cell 501, and the fixing plate 506 is provided with two movable pointers 605.

The number of the active pointers 605 in this embodiment is 1, and the number of the active pointers is not limited in other embodiments and may be greater than or equal to 2.

The second balancing assembly comprises a second mobile battery and a second switch assembly, one end of the second switch assembly is connected with the second mobile battery, and the other end of the second switch assembly is connected with the battery.

The present application further proposes a first equalizing assembly of a third embodiment, as shown in fig. 8A-8D, fig. 8A is a schematic structural diagram of the third embodiment of the first equalizing assembly in the battery equalizing device of the present application having a plurality of mobile batteries; FIG. 8B is a schematic diagram of a specific structure of the contact disk in the embodiment of FIG. 8A; FIG. 8C is a schematic structural diagram of the fixing plate in the embodiment of FIG. 8A; FIG. 8D is a schematic view showing the detailed structure of the connector in the embodiment of FIG. 8A. FIG. 8E is a left side view of the connector in the embodiment of FIG. 8C; FIG. 8F is an elevation view of the connector of the embodiment of FIG. 8C; fig. 8G is a schematic diagram of the connection of the motorized battery to the battery pack in the embodiment of fig. 8A. The first equalizing component 801 of the present embodiment includes: a first motorized battery, a housing 812, a battery compartment 802, a motor 813, a connector 808, a mounting plate 806, a contact puck 804, and a detent 814.

The battery compartment 802 is used for accommodating a first motor battery 817, the motor 813 is connected with the connecting piece 808 through a connecting rod 815, and an inclined contact pin 809 is arranged on one side of the connecting piece 808 far away from the motor 813. A limiting shaft (not shown, a spring 811 is sleeved on the limiting shaft) is arranged at the bottom of the housing 812, and the fixing plate 806 is arranged on the limiting shaft and can move along the limiting shaft; the fixing plate 806 is provided with a through hole 807, and the through hole 807 can be used for accommodating a bevel contact pin 809; the fixing plate 806 is provided with a spring plate 810 at a side far away from the connecting piece 808.

The contact disc 804 is provided with a plurality of contacts 805 and a plurality of pins 816, each pin 816 can be welded on the contact disc 804, each contact 805 is connected with the corresponding pin 816, and the elastic sheet 810 is used for being connected with the corresponding contact 805; detents 814 are provided on the side walls of the housing 812 corresponding to the fixing plate 806, and the detents 814 are used to position the fixing plate 806.

The inclined plane contact pin 809 of the present embodiment includes a first inclined plane contact pin 8091 and a second inclined plane contact pin 8092, and the first inclined plane contact pin 8091 and the second inclined plane contact pin 8092 are both trapezoidal, and this structure can reduce friction when the inclined plane contact pin 809 enters and exits the through hole 807.

When the battery balancing device 801 balances the battery 818 to be balanced through the motor-driven battery 817, the motor 813 drives the connecting piece 808 to rotate through the connecting rod, and then the inclined contact pin 809 rotates, the inclined contact pin 809 abuts against the fixing plate 806, and a certain pressure is applied to the fixing plate 806, so that the fixing plate 806 is pressed downwards and the gap distance between the fixing plate 806 and the contact disc 804 is reduced, and the elastic sheet 810 is in contact with the contact 805 of the contact disc 804. The elastic sheet 810 comprises a first elastic sheet 8101 and a second elastic sheet 8102, the negative electrode of the mobile battery 817 is in contact with the first elastic sheet 8101, the contact point 805 in contact with the first elastic sheet 8101 is connected with the negative electrode of the battery 818 to be balanced through the corresponding contact pin 816, the contact point 805 in contact with the second elastic sheet 8102 is connected with the positive electrode of the battery 818 to be balanced through the corresponding contact pin 816, and the mobile battery 817 is connected with the battery 818 to be balanced in parallel, so that battery balancing is achieved.

When the battery 818 to be balanced is balanced, the motor 813 drives the connecting piece 808 to drive the inclined contact pin 809 to rotate, the inclined contact pin 809 slides into the through hole 807, the spring 811 jacks the fixing plate 806, at the moment, a certain gap exists between the fixing plate 806 and the contact disc 804, the spring plate 810 is disconnected with the contact 805 of the contact disc 804, and at the moment, the battery is charged and discharged normally.

The battery pack of the embodiment is provided with a socket 803 for connecting the pin 816 to be led out and connected with the battery to be equalized.

In this embodiment, the inclined contact pins 809 can be used to lift and rotate the fixing plate 806.

Further, the present embodiment further includes a receptacle 819 for the first equalizer assembly 801 to mate with other equalizer assemblies.

Further, the present embodiment may detect the access position of the mobile battery 817 by a photoelectric sensor or the like, and specifically, may acquire the access position of the mobile battery 817 by detecting a voltage difference between the negative electrode of the mobile battery 817 and the negative electrode of the first battery of the battery pack; meanwhile, the gear position of the pawl 814 can be detected by a photoelectric sensor or the like to acquire the position of the contact disc 804 corresponding to the spring plate 810.

The specific structure and the equalizing method of the second equalizing component of the present application are the same as those of the first equalizing component, and therefore are not repeated.

The present application further provides a battery balancing apparatus of a fourth embodiment, as shown in fig. 9, the present embodiment is described on the basis of the above embodiments, in which the first balancing component 902 and the second balancing component 903 of the battery balancing apparatus 901 of the present embodiment having a plurality of mobile batteries are stacked, and the first terminal 905 of the first switch component 904 is disposed corresponding to the plurality of first terminals 907 of the second switch component 906.

Specifically, the first terminal 905 of the first switching element 904 may be correspondingly connected to the plurality of first terminals 907 of the second switching element 906 via internal wiring within the second equalizing element 903.

When the controller 908 determines that there are multiple batteries to be equalized, the first equalizing component 902 may be controlled to equalize the electric quantity of a part of the batteries to be equalized, and the second equalizing component 903 may be controlled to equalize the electric quantity of another part of the batteries to be equalized.

Specifically, the controller 908 may time-share or simultaneously control the first switch assembly 904 and the second switch assembly 906. For example, when the controller time-divisionally controls the first switch module 904 and the second switch module 906, the fixing plate of the first switch module 904 may be controlled to rotate so that the second terminal of the first switch module 904 is connected to the first terminals located in the areas a and B to equalize the cells corresponding to the areas a and B in the battery pack with the first motor cell, and the fixing plate of the second switch module 906 may be controlled to rotate so that the second terminal of the second switch module 906 is connected to the first terminals located in the areas C and D to equalize the cells corresponding to the areas D and D in the battery pack with the first motor cell.

In this way, it is possible to equalize the charge of a plurality of cells when the cracking of the battery pack is severe.

In one embodiment, the electric quantities of the mobile batteries in different balancing assemblies can be different, the monitor can detect the specific electric quantity of each battery to be balanced, and the controller can select the mobile battery matched with the electric quantity to be balanced to balance the electric quantity according to the specific electric quantity of each battery to be balanced. Through the mode, a better balancing effect can be achieved, and the balancing efficiency of the whole battery pack can be improved.

The specific equalizing process of the equalizing component to equalize the battery has been described in the foregoing embodiments, and is not described herein again.

In one embodiment, a switch assembly of the plurality of equalization assemblies may share a contact puck.

The application further provides a battery equalization apparatus of the fifth embodiment, and as shown in fig. 10, a first switch assembly 1001 of the present embodiment includes at least a first terminal 1002, a guide rail 1003, a second terminal 1004, and a connection 1005, which are arranged in a straight line.

One end of the connecting piece 1005 is sleeved on the guide rail 1003, and the connecting piece 1005 can move on the guide rail 1003 through the driving of the motor. The other end of the connection piece 1005 is selectively connected to the first terminal 1002, a plurality of the first terminals 1002 arranged in a line are arranged in parallel with the guide rail 1003, and the second terminal 1004 is further connected to one end of the connection piece 1005.

The first switch assembly 1001 of the present embodiment may include two connecting members 1005, two first terminals 1002, and two second terminals 1004, the two second terminals 1004 are respectively connected to the two connecting members 1005, and the two second terminals 1004 are respectively connected to two ends of the mobile battery; the two first terminals 1002 are respectively connected to two ends of the first battery to be equalized.

The controller controls the link 1005 to move along the guide 1003 according to the position information so that the other end of the link 1005 is connected to the first terminal 1002. The controller drives the motor according to the position information, so that the connecting piece 1005 moves along the guide rail 1003, the other end of the connecting piece 1005 is located above the first terminal 1002, the controller further drives the motor to rotate, so that the other end of the connecting piece 1005 is connected with the first terminal 1002, the connecting piece 1005 is located at the first position, and then the first motor battery is connected with the first battery to be equalized 303 through the connecting piece 1005.

If the controller determines that the power information is greater than or equal to the first power information, the controller controls the other end of the connector to be suspended, so that the first terminal 1002 and the second terminal 1004 are disconnected. The controller controls the motor to control the connecting piece 1005 to rotate, the other end of the connecting piece 1005 is suspended, and the connecting piece 1005 is arranged at the second position. The other end of the connecting member 1005 is disconnected from the first terminal 902 at this time.

Compared with the equalizing device of the second embodiment, the equalizing device of the embodiment has the advantages of simpler structure, easiness in implementation and cost saving.

In another embodiment, the balancing device may further include a third balancing component, where the third balancing component includes a third mobile battery, one end of the first mobile battery is connected to the first switch component, and the other end of the first mobile battery is connected to the third mobile battery, and the first mobile battery and the third mobile battery are connected in series to balance the electric quantity of the first battery to be balanced.

As shown in fig. 11, the electric vehicle further includes a battery pack 1101 and an equalizing device 1102, wherein an interface is preset above the battery pack 1101, so that the equalizing device 1002 is disposed above the battery pack 1101, and the equalizing device 1102 is the equalizing device disclosed in the foregoing embodiments and is not described herein again.

Different from the prior art, the embodiment of the application has a battery balancing device and a balancing method of a plurality of mobile batteries, and an electric vehicle, wherein the battery balancing device is used for the electric vehicle, the electric vehicle comprises a battery pack and a battery balancing device, the battery pack comprises a plurality of batteries connected in series, and the battery balancing device at least comprises: the monitor is used for respectively acquiring the electric quantity information of the plurality of batteries; the first equalizing assembly and the second equalizing assembly are respectively used for equalizing the electric quantity of the plurality of batteries; the controller is used for acquiring a first to-be-equalized battery and a second to-be-equalized battery of which the electric quantity information is smaller than the preset electric quantity information according to the electric quantity information of the battery, controlling the first equalizing assembly to perform electric quantity equalization on the first to-be-equalized battery, and controlling the second equalizing assembly to perform electric quantity equalization on the second to-be-equalized battery. In this way, this application embodiment can treat through two at least balanced subassemblies to two at least and equalize electric quantity information to carry out electric quantity information equalization to the group battery that splits seriously, simultaneously, this application embodiment can monitor the electric quantity information of battery, and carry out the equilibrium to the electric quantity information of battery when the electric quantity information of battery is less than predetermined electric quantity information, consequently can avoid extravagant electric energy, keep the electric quantity of primary battery group.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A battery equalization apparatus having a plurality of motorized batteries, for an electric vehicle, the electric vehicle comprising a battery pack and the battery equalization apparatus, the battery pack comprising a plurality of batteries connected in series, the battery equalization apparatus comprising at least:

the monitor is used for respectively acquiring the electric quantity information of the plurality of batteries;

the first equalizing assembly and the second equalizing assembly are respectively used for equalizing the electric quantity of the batteries;

the controller is used for acquiring a first to-be-equalized battery and a second to-be-equalized battery of which the electric quantity information is smaller than preset electric quantity information according to the electric quantity information of the battery, controlling the first equalizing assembly to perform electric quantity information equalization on the first to-be-equalized battery, and controlling the second equalizing assembly to perform electric quantity information equalization on the second to-be-equalized battery.

2. The battery equalization apparatus of claim 1, wherein the first equalization assembly comprises: a first motorized battery and a first switch assembly, both coupled to the controller, one end of the first switch assembly being connected to the first motorized battery, the other end of the first switch assembly being connected to the battery; the second equalizing assembly comprises a second mobile battery and a second switch assembly, one end of the second switch assembly is connected with the second mobile battery, and the other end of the second switch assembly is connected with the battery;

the controller controls the first switch assembly to connect the first mobile battery and the first battery to be equalized so that the first mobile battery can equalize the electric quantity of the first battery to be equalized, and the controller controls the second switch assembly to connect the second mobile battery and the second battery to be equalized so that the second mobile battery can equalize the electric quantity of the second battery to be equalized.

3. The battery balancing apparatus of claim 2, wherein the first balancing component is provided with a first plug port, the second balancing component is provided with a second plug port, and the first plug port is connected with the second plug port to stack the first balancing component and the second balancing component.

4. The battery equalization apparatus of claim 3, wherein the first switch assembly comprises a plurality of first terminals, second terminals, a contact disc, and movable fingers, the second terminals are disposed in a middle region of the contact disc, the first terminals are arranged and distributed outside the middle region, one end of the movable fingers is connected to the second terminals, and when the controller controls the switch assembly to connect the motor battery and the battery to be equalized, the other end of the movable fingers is rotated to the first terminal connected to the battery to be equalized, so that the second terminals are connected to the first terminals.

5. The battery equalization apparatus of claim 4, wherein the first terminals of the first switch assembly are disposed in correspondence with the first terminals of the second switch assembly.

6. The battery balancing apparatus of claim 4, wherein the first balancing assembly further comprises a housing and a fixing plate, wherein the contact disc is disposed at the bottom of the housing, the fixing plate is fixed to the housing through a rotating shaft, the movable pointer is disposed on the fixing plate, and the other end of the movable pointer is disposed on a surface of the fixing plate adjacent to the contact disc;

the first equalizing assembly further comprises a motor, a spring and a connecting piece, wherein the motor is respectively connected with the controller and the connecting piece, and the spring is arranged between the contact disc and the fixing plate; the controller controls the motor to work, the motor drives the connecting piece to be connected with the fixed plate, and the connecting piece drives the fixed plate to rotate under the driving of the motor, so that the other end of the movable pointer rotates to a first terminal connected with the first battery to be equalized;

the first equalizer assembly further includes a detent switch disposed on a side wall of the housing and corresponding to the fixing plate, the detent switch for holding the fixing plate in a selected one of the directions and positioning the fixing plate.

7. The battery equalization apparatus of claim 1, wherein the first equalization assembly comprises: the motor-driven battery comprises a first motor-driven battery, a shell, a battery compartment, a motor, a connecting piece, a contact disc, a fixing plate and a pawl, wherein the battery compartment is used for containing the first motor-driven battery, the motor is connected with the connecting piece through a connecting rod, one side, far away from the motor, of the connecting piece is provided with an inclined plane contact pin, the fixing plate is provided with a through hole, the through hole is used for containing the inclined plane contact pin, one side, far away from the connecting piece, of the fixing plate is provided with an elastic sheet, the bottom of the shell is provided with a limiting shaft, and the fixing plate is arranged on the limiting shaft and moves.

8. The battery equalization apparatus of claim 2, wherein the first switch assembly comprises a first terminal, a guide rail, a second terminal and a connecting member arranged in a straight line, wherein one end of the connecting member is sleeved on the guide rail, the other end of the connecting member is selectively connected with the first terminal, a plurality of the first terminals are arranged in parallel with the guide rail, the second terminal is connected with one end of the connecting member, the first terminal is connected with the battery, and the second terminal is connected with the mobile battery;

when the controller controls the first switch assembly to connect the first power-driven battery and the first battery to be equalized, the connecting piece moves along the guide rail to connect the other end of the connecting piece with the first terminal connected with the first battery to be equalized.

9. A battery equalization method is characterized in that a battery equalization device is used for equalizing electric quantity information of a battery pack, the battery pack comprises a plurality of batteries which are connected in series, the battery equalization device is used for equalizing electric quantity of the batteries, the battery equalization device at least comprises a monitor, a first equalization assembly, a second equalization assembly and a controller, and the battery equalization method comprises the following steps:

the controller acquires the electric quantity information of the plurality of batteries through the monitor;

the controller compares the electric quantity information with preset electric quantity information to obtain a first battery to be equalized and a second battery to be equalized, wherein the electric quantity information is smaller than the preset electric quantity information;

the controller controls the first balancing assembly to balance the electric quantity of the first battery to be balanced and controls the second balancing assembly to balance the electric quantity of the second battery to be balanced.

10. An electric vehicle comprising a battery pack and the battery equalization apparatus of any of claims 1-8.