WO2018209786A1 - Battery pack charging system and method - Google Patents

Battery pack charging system and method Download PDF

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Publication number
WO2018209786A1
WO2018209786A1 PCT/CN2017/093372 CN2017093372W WO2018209786A1 WO 2018209786 A1 WO2018209786 A1 WO 2018209786A1 CN 2017093372 W CN2017093372 W CN 2017093372W WO 2018209786 A1 WO2018209786 A1 WO 2018209786A1
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WIPO (PCT)
Prior art keywords
charging
switching device
branch
power source
battery pack
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PCT/CN2017/093372
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French (fr)
Chinese (zh)
Inventor
蔡世明
张凯
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宁德时代新能源科技股份有限公司
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Publication of WO2018209786A1 publication Critical patent/WO2018209786A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit

Definitions

  • the present invention relates to the field of power batteries, and more particularly to a battery pack charging system and method.
  • battery packs are used as power sources in various fields.
  • the battery pack is generally recyclable and recyclable so that it can be recycled.
  • a battery pack with a larger capacity is generally composed of a plurality of branches in parallel, and each branch needs to be charged.
  • the total current of the battery pack charging circuit is the sum of the charging currents of the plurality of branches. In other words, the total charging current of the battery pack charging circuit is also large.
  • an overcurrent device will be provided. When the charging current is too large during charging, or when overcharging occurs, the overcurrent device disconnects the battery pack from the charging power source.
  • the normal total charging current is also large.
  • the total charging current of the battery pack with a large capacity for rapid charging can reach 1000A.
  • Embodiments of the present invention provide a battery pack charging system and method, which can ensure that a battery pack with a large charging current is normally charged.
  • an embodiment of the present invention provides a battery pack charging system including N charging branches sequentially arranged between a positive pole of a charging power source and a negative pole of a charging power source, where N is an integer greater than or equal to 2;
  • the input end of the charging branch is connected to the positive pole of the charging power source, and the output end of the first charging branch is connected to the negative pole of the charging power source through the first switching device; except for the first charging branch and the Nth charging branch
  • the input terminals of the remaining remaining charging branches pass through the second switching device Connected to the positive pole of the charging power supply, the output end of the remaining charging branch is connected to the negative pole of the charging power source through the third switching device;
  • the input end of the Nth charging branch is connected with the positive pole of the charging power source through the fourth switching device, the Nth
  • the output end of the charging branch is connected to the negative pole of the charging power source;
  • the output end of the i-th charging branch is connected to the input end of the i+1th charging branch through the fifth switching
  • an embodiment of the present invention provides a battery pack charging method, which is used in the battery pack charging system in the above embodiment, the method includes: detecting whether the battery assembly is in a charging state; and if the battery assembly is in a charging state, The input end of the charging branch of the first charging is connected to the positive pole of the charging power source, the output end of the Nth charging branch is connected to the negative pole of the charging power source, the fifth switching device is closed, and the switching devices except the fifth switching device are disconnect.
  • Embodiments of the present invention provide a battery pack charging system and method, the system including N charging branches arranged in sequence.
  • the input end of the first charging branch is connected to the positive pole of the charging power source, and the output end of the first charging branch is connected to the negative pole of the charging power source through the first switching device.
  • the input end and the output end of the remaining charging branch except the first charging branch and the Nth charging branch are respectively connected to the positive pole and the negative pole of the charging power source through the second switching device and the third switching device.
  • the input end of the Nth charging branch is connected to the positive pole of the charging power source through the fourth switching device, and the output end of the Nth charging branch is connected to the negative pole of the charging power source.
  • the output end of the i-th charging branch is connected to the input end of the i+1th charging branch through the fifth switching device.
  • the N charging branches are connected in series when the battery assembly is in a charged state, reducing the total charging current of the battery pack charging circuit. Therefore, with an overcurrent device that supports a small charging current, it is also possible to ensure that the battery pack with a large charging current is normally charged.
  • FIG. 1 is a schematic structural view of a battery pack charging system according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of another battery pack charging system according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a battery pack charging system in an example of an embodiment of the present invention.
  • FIG. 4 is a flow chart of a battery pack charging method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a battery pack charging method according to another embodiment of the present invention.
  • FIG. 6 is a flow chart of a battery pack charging method according to still another embodiment of the present invention.
  • Embodiments of the present invention provide a battery pack charging system and method, which can utilize an existing overcurrent device supporting a small charging current to ensure that a battery pack having a large charging current can be normally charged.
  • the switching device can be disposed at a connection between the charging branch of the battery pack and the anode of the charging power source, the cathode of the charging power source, and the charging branches.
  • multiple charging branches are routed in parallel and converted into series. Thereby reducing the total charging current in the battery pack charging circuit, and avoiding the use of an overcurrent device supporting a smaller charging current to affect the normal charging of the battery pack.
  • charging the battery pack is equivalent to charging the battery assembly in the battery pack charging system.
  • the battery pack charging system in the embodiment of the present invention includes N charging branches sequentially arranged between the positive pole of the charging power source and the negative pole of the charging power source, and N is an integer greater than or equal to 2.
  • FIG. 1 is a schematic structural diagram of a battery pack charging system 10 according to an embodiment of the present invention.
  • FIG. 1 there are three charging branches between the positive pole of the charging power source and the negative pole of the charging power source, which are B1, B2 and B3, respectively. Can also be used at the convergence point of 3 charging branches and charging power
  • a switching device K6 is provided between the positive electrodes, and a switching device K7 is provided between the convergence points of the three charging branches and the negative terminal of the charging power source. It is possible to control whether or not charging is performed by controlling the opening and closing states of the switching devices K6 and K7. When the switching devices K6 and K7 are closed, charging is performed. When at least one of the switching devices K6 and K7 is turned off, charging is stopped.
  • the input end of the first charging branch B1 is connected to the positive pole of the charging power source, and the output end of the first charging branch B1 is connected to the cathode of the charging power source via the first switching device K1.
  • the input end of the second charging branch B2 is connected to the positive pole of the charging power source via the second switching device K2, and the output end of the second charging branch B2 is connected to the negative pole of the charging power source via the third switching device K3.
  • the input end of the third charging branch B3 is connected to the positive pole of the charging power source via the fourth switching device K4, and the output end of the third charging branch B3 is connected to the negative pole of the charging power source.
  • the output of any one of the charging branches is connected to the input of the next charging branch via the fifth switching device K5. That is to say, the output end of the ith charging branch and the input end of the i+1th charging branch are connected by the fifth switching device K3, i is an integer and 1 ⁇ i ⁇ N.
  • the output end of the first charging branch B1 and the input end of the second charging branch B2 are connected by the fifth switching device K5, and the output end of the second charging branch B2 and the third charging branch B3 The input is connected via a fifth switching device K5.
  • Each of the above charging branches includes at least one battery assembly.
  • the battery assembly can concentrate or discharge power.
  • the accumulated power is the charge, and the discharge is the discharge.
  • each charging branch includes two battery assemblies.
  • the input end of the first charging branch B1 can be connected to the positive terminal of the charging power source, the first switching device K1 can be disconnected, and the second switching device K2 can be disconnected.
  • the fifth switching device K5 can be closed.
  • the three branches in the battery pack charging system are connected in series, and the total charging current in the battery charging circuit through the three branches after the series is much smaller than the three branches through the parallel connection. The total charging current in the battery pack charging loop.
  • the overcurrent device in the battery charging circuit can support the total charging current of 600A.
  • the three charging branches are connected in series, and the total charging current of the battery charging circuit is 300A, in the overcurrent.
  • the range of total charge currents that the device can support allows the battery assembly in the battery pack to be properly charged.
  • the input terminals of the remaining charging branches except the first charging branch and the Nth charging branch pass through the second
  • the switching device is connected to the positive pole of the charging power source, and the output ends of the remaining charging branches are connected to the negative pole of the charging power source through the third switching device.
  • FIG. 2 is a schematic structural diagram of another battery pack charging system according to an embodiment of the present invention.
  • the battery pack charging system includes four charging branches, namely D1, D2, D3 and D4. It is also possible to provide a switching device K6 between the convergence point of the four charging branches and the positive terminal of the charging power source, and a switching device K7 is provided between the convergence point of the four charging branches and the negative terminal of the charging power source. Whether or not charging is performed can be controlled by controlling the opening and closing states of the switching devices K6 and K7. When the switching devices K6 and K7 are closed, charging is performed. When at least one of the switching devices K6 and K7 is turned off, charging is stopped.
  • the input end of the first charging branch D1 is connected to the positive pole of the charging power source, and the output end of the first charging branch D1 is connected to the cathode of the charging power source via the first switching device K1.
  • the output end of the first charging branch D1 and the input end of the second charging branch are connected via a fifth switching device K5.
  • the input end of the second charging branch D2 is connected to the positive pole of the charging power source through the second switching device K2, and the output end of the second charging branch D2 is connected to the negative pole of the charging power source through the third switching device K3.
  • the output of the second charging branch D2 and the input of the third charging branch D3 are connected via a fifth switching device K5.
  • the input end of the third charging branch D3 is connected to the positive pole of the charging power source through the second switching device K2, and the output end of the third charging branch D3 is connected to the negative pole of the charging power source through the third switching device K3.
  • the output of the third charging branch D3 and the input of the fourth charging branch D4 are connected by a fifth switching device K5.
  • the input end of the fourth charging branch D4 is connected to the positive pole of the charging power source via the fourth switching device K4, and the output end of the fourth charging branch D4 is connected to the negative pole of the charging power source.
  • the number of the first switching device, the second switching device, the third switching device, the fourth switching device, and the fifth switching device in the above embodiment may be one or more, and is not limited.
  • the input end of the first charging branch can be directly connected to the positive pole of the charging power source, or can be connected through a switching device.
  • the output of the Nth charging branch can be directly connected to the negative pole of the charging power source or can be connected through a switching device.
  • the first charging branch is in communication with the positive pole of the charging power source, and the Nth charging branch is in communication with the negative pole of the charging power source.
  • Embodiments of the present invention provide a battery pack charging system including N charging branches arranged in sequence.
  • the input end of the first charging branch is connected to the positive pole of the charging power source, and the output end of the first charging branch is connected to the negative pole of the charging power source through the first switching device.
  • the input end and the output end of the remaining charging branch except the first charging branch and the Nth charging branch are respectively connected to the positive pole and the negative pole of the charging power source through the second switching device and the third switching device.
  • the input end of the Nth charging branch is connected to the positive pole of the charging power source through the fourth switching device, and the output end of the Nth charging branch is connected to the negative pole of the charging power source.
  • the output end of the i-th charging branch is connected to the input end of the i+1th charging branch through the fifth switching device.
  • the input end of the first charging branch can be connected to the positive terminal of the charging power source, and the first switching device can be closed to enable the second switch.
  • the device is closed, the third switching device can be closed, the fourth switching device can be closed, and the output end of the Nth charging branch can be connected to the negative terminal to disconnect the fifth switching device.
  • the order of opening or closing of the first switching device, the second switching device, the third switching device, the fourth switching device, and the fifth switching device may be set.
  • the fifth switching device can be turned off first, and then the first switching device, the second switching device, the third switching device, and the fourth switching device are both closed.
  • the N charging branches in the battery charging system are connected in parallel, and each charging branch in parallel can be Output power to the outside.
  • a mutually exclusive state can be formed.
  • any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is in a closed state, and the fifth switching device is in an off state.
  • the fifth switching device is in a closed state, and the first switching device, the second switching device, the third switching device, and the fourth switching device are all in an off state. Therefore, the switching devices in the mutually exclusive state are prevented from being simultaneously closed, causing a short circuit in the charging circuit or the discharging circuit.
  • the battery pack charging system may further include a first adhesion detecting module and a first control module.
  • the first adhesion detecting module is configured to detect whether any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed before charging the battery assembly.
  • the first control module is configured to disable charging of the battery assembly if any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed.
  • any one of the first switching device K1, the second switching device K2, the third switching device K3, and the fourth switching device K4 is closed, the switching device K6 and / Or K7 is disconnected, and the battery assembly is prohibited from charging.
  • the fifth switching device is enabled. K5 is disconnected, thereby disabling the charging of the battery assembly.
  • the plurality of charging branches cannot be connected in series, which may affect the battery The group is charged normally.
  • the battery pack charging system may further include a second adhesion detection module and a second control module.
  • the second adhesion detecting module is configured to detect whether the fifth switching device is closed before the battery assembly is discharged.
  • the second control module is configured to inhibit the battery assembly from discharging if the fifth switching device is closed.
  • the plurality of charging branches are connected in series, which may cause a short circuit in the charging branch, thereby affecting the normal discharge of the battery pack.
  • the fifth switching device may be connected with a fuse. If the current passing between the i-th charging branch and the i+1th charging branch is too large, the fuse is blown.
  • the charging circuit can be disconnected in the event of an overcurrent or short circuit in the charging circuit, thereby protecting the battery pack charging system.
  • FIG. 3 is a schematic structural diagram of a battery pack charging system 10 in an example of an embodiment of the present invention. 3 is different from FIG. 1 in that the output end of the first charging branch B1 and the fifth switching device K5 can be connected by a fuse f1, and the output end of the second charging branch B2 and the fifth switching device K5 can be connected by fuse f2.
  • the fuse may be disposed between the input end of the charging branch and the fifth switching device.
  • the fifth switching device K5 and the input end of the second charging branch B2 are connected by a fuse
  • the fifth switching device K5 and the The input terminals of the three charging branches B3 are connected by a fuse.
  • the switching device (including the first switching device, the second switching device, the third switching device, the fourth switching device, and the fifth switching device) in the above embodiments includes a contactor, and may also be other switching devices having a switching function.
  • the contactor can be a relay. If the relay is installed in a high voltage circuit, the relay can be placed in a high voltage box.
  • the battery assembly may include a battery cell, a battery module, or a battery pack.
  • the battery assembly can be selected according to the working scenario. For example, if the battery pack charging system is used to charge the battery pack of the electric vehicle, the battery assembly can be a battery pack to provide more electric power for the electric vehicle.
  • the battery pack charging method includes steps 201-202.
  • step 201 it is detected whether the battery assembly is in a charged state.
  • step 202 if the battery assembly is in a charging state, the input end of the first charging branch is controlled to communicate with the positive terminal of the charging power source of the charging power source, and the output end of the Nth charging branch is connected to the negative terminal of the charging power source.
  • the fifth switching device is closed, and the switching devices other than the fifth switching device are turned off.
  • the input end of the first charging branch is controlled to communicate with the positive terminal of the charging power source.
  • the output end of the i-th charging branch is in communication with the input end of the i+1th charging branch.
  • the output end of the Nth charging branch is in communication with the negative terminal of the charging power source.
  • Embodiments of the present invention provide a battery pack charging method, which is applied to a battery pack charging system. If the battery assembly is in a charging state, controlling the input end of the first charging branch to communicate with the positive pole of the charging power source, the output end of the Nth charging branch is in communication with the negative pole of the charging power source, and the fifth switching device is closed, except the The switching devices other than the five-switch device are disconnected. Thereby all the charging branches in the battery pack charging system are connected in series, which reduces the total charging current of the battery pack charging circuit. Therefore, with an overcurrent device that supports a small charging current, it is also possible to ensure that the battery pack with a large charging current is normally charged.
  • FIG. 5 is a flowchart of a battery pack charging method according to another embodiment of the present invention. 5 is different from FIG. 4 in that the battery pack charging method shown in FIG. 5 further includes steps 203 to 204.
  • step 203 it is detected whether the battery assembly is in a discharged state.
  • whether the battery assembly is in a discharged state can be detected by detecting whether a discharge signal is present. If there is a discharge signal, the battery assembly is in a discharged state.
  • step 204 if the battery assembly is in a discharged state, the input end of the first charging branch is controlled to communicate with the positive terminal of the charging power source, and the output end of the Nth charging branch is connected to the negative terminal of the charging power source, and the fifth switch The device is turned off and the switching devices except the fifth switching device are closed.
  • the input terminals of all the charging branches are controlled to communicate with the positive pole of the charging power source, and the output ends of all the charging branches are connected with the negative pole of the charging power source.
  • One charging branch is disconnected from the next charging branch and is not conducting.
  • a plurality of charging branches are connected in parallel.
  • step 203 and step 204 may be performed after step 202, or may be performed before step 201, and the order of execution of step 203 and step 204 and other steps is not limited herein.
  • FIG. 6 is a flow chart of a battery pack charging method according to still another embodiment of the present invention. 6 is different from FIG. 5 in that the battery pack charging method shown in FIG. 6 may further include steps 205 to 208.
  • step 205 it is detected whether any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed before the battery assembly is charged.
  • the switching device that may cause the charging branch to be connected in parallel is detected before the battery assembly is charged, that is, immediately before the battery assembly is charged. If it is possible to close any one of the switching devices in parallel with the charging branch, the battery assembly is prohibited from being charged, and the total charging current of the battery charging circuit is prevented from being excessively large, which affects the normal charging of the battery pack.
  • step 206 if any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed, charging of the battery assembly is prohibited.
  • step 207 it is detected whether the fifth switching device is closed before the battery assembly is discharged.
  • the switching device that may cause the charging branch to be connected is closed before the battery assembly is discharged, that is, immediately before the battery assembly is discharged. If it is possible to close the switching device in series with the charging branch, the battery assembly is prohibited from being discharged to avoid affecting the normal discharge of the battery pack.
  • step 208 if the fifth switching device is closed, the battery assembly is inhibited from discharging.
  • the functional modules (such as the first adhesion detection module, the first control module, the second adhesion detection module, and the second control module) in the above embodiments may be implemented as hardware, software, firmware, or a combination thereof.
  • it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, plug-ins, function cards, and the like.
  • ASIC application specific integrated circuit
  • the elements of the present invention are programs or code segments that are used to perform the required tasks. Program or code segment can It is stored in a machine readable medium or transmitted over a transmission medium or communication link by a data signal carried in a carrier wave.
  • a "machine-readable medium” can include any medium that can store or transfer information.

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  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

Disclosed are a battery pack charging system and method, relating to the field of power batteries. The battery pack charging system comprises: N charging branches sequentially arranged between a positive electrode and a negative electrode of a charging power supply, wherein a first charging branch (B1) is connected to the positive electrode of the charging power supply and is connected to the negative electrode of the charging power supply by means of a first switching device (K1); the remaining charging branches, other than the first charging branch (B1) and an Nth charging branch, are all connected to the positive electrode of the charging power supply by means of a second switching device (K2); the remaining charging branches are all connected to the negative electrode of the charging power supply by means of a third switching device (K3); the Nth charging branch is connected to the negative electrode of the charging power supply and is connected to the positive electrode of the charging power supply by means of a fourth switching device (K4); an output end of an ith charging branch is connected to an input end of an (i+1)th charging branch by means of a fifth switching device (K5); battery assemblies in the charging branches are in a charging state; the first charging branch (B1) is in communication with the positive electrode of the charging power supply; the Nth charging branch is in communication with the negative electrode; the fifth switching device (K5) is closed; and the switching devices, other than the fifth switching device (K5), are all open. The battery pack charging system and method can ensure the normal charging of a battery pack with a larger charging current.

Description

电池组充电***和方法Battery pack charging system and method 技术领域Technical field
本发明涉及动力电池领域，尤其涉及一种电池组充电***和方法。The present invention relates to the field of power batteries, and more particularly to a battery pack charging system and method.
背景技术Background technique
随着新能源的广泛使用，电池组作为动力源应用在各个领域中。为了增加电池组的使用寿命，电池组一般可循环充放电，从而能够循环使用。With the widespread use of new energy sources, battery packs are used as power sources in various fields. In order to increase the life of the battery pack, the battery pack is generally recyclable and recyclable so that it can be recycled.
为了缩短电池组的充电时间，快速充电技术应运而生。快速充电的过程中，充电电流很大。容量较大的电池组一般由多个支路并联组成，每个支路均需要进行充电。电池组充电回路的总电流为多个支路上的充电电流之和。也就是说，电池组充电回路的总充电电流也很大。为了防止电池组在充电过程中充电电流过大，或出现过充的现象损坏电池组，会设置过流器件。当充电过程中充电电流过大时，或出现过充的现象时，过流器件会断开电池组与充电电源的连接。但是，在容量较大的电池组进行快速充电时，正常的总充电电流也很大，比如容量较大的电池组进行快速充电的总充电电流可以达到1000A。但却难以找到能够在1000A的充电电流下工作的过流器件，从而使得充电电流较大的电池组无法正常进行充电。In order to shorten the charging time of the battery pack, fast charging technology came into being. During the fast charging process, the charging current is large. A battery pack with a larger capacity is generally composed of a plurality of branches in parallel, and each branch needs to be charged. The total current of the battery pack charging circuit is the sum of the charging currents of the plurality of branches. In other words, the total charging current of the battery pack charging circuit is also large. In order to prevent the battery pack from charging too much during charging, or overcharging may damage the battery pack, an overcurrent device will be provided. When the charging current is too large during charging, or when overcharging occurs, the overcurrent device disconnects the battery pack from the charging power source. However, when the battery pack with a large capacity performs rapid charging, the normal total charging current is also large. For example, the total charging current of the battery pack with a large capacity for rapid charging can reach 1000A. However, it is difficult to find an overcurrent device capable of operating at a charging current of 1000 A, so that a battery pack having a large charging current cannot be normally charged.
发明内容Summary of the invention
本发明实施例提供了一种电池组充电***和方法，能够保证充电电流较大的电池组正常进行充电。Embodiments of the present invention provide a battery pack charging system and method, which can ensure that a battery pack with a large charging current is normally charged.
一方面，本发明实施例提供了一种电池组充电***，包括在充电电源的正极和充电电源的负极之间的顺序排列的N条充电支路，N为大于或等于2的整数；第1条充电支路的输入端与充电电源的正极连接，第1条充电支路的输出端与充电电源的负极通过第一开关器件连接；除第1条充电支路与第N条充电支路之外的剩余充电支路的输入端均通过第二开关器件 与充电电源的正极连接，剩余充电支路的输出端均通过第三开关器件与充电电源的负极连接；第N条充电支路的输入端与充电电源的正极通过第四开关器件连接，第N条充电支路的输出端与充电电源的负极连接；第i条充电支路的输出端与第i+1条充电支路的输入端通过第五开关器件连接；其中，每条充电支路包括至少一个电池集合体；电池集合体处于充电状态，第1条充电支路的输入端与充电电源的正极连通，第一开关器件断开，第二开关器件断开，第三开关器件断开，第四开关器件断开，第N条充电支路的输出端与充电电源的负极连通，第五开关器件闭合。In one aspect, an embodiment of the present invention provides a battery pack charging system including N charging branches sequentially arranged between a positive pole of a charging power source and a negative pole of a charging power source, where N is an integer greater than or equal to 2; The input end of the charging branch is connected to the positive pole of the charging power source, and the output end of the first charging branch is connected to the negative pole of the charging power source through the first switching device; except for the first charging branch and the Nth charging branch The input terminals of the remaining remaining charging branches pass through the second switching device Connected to the positive pole of the charging power supply, the output end of the remaining charging branch is connected to the negative pole of the charging power source through the third switching device; the input end of the Nth charging branch is connected with the positive pole of the charging power source through the fourth switching device, the Nth The output end of the charging branch is connected to the negative pole of the charging power source; the output end of the i-th charging branch is connected to the input end of the i+1th charging branch through the fifth switching device; wherein each charging branch includes At least one battery assembly; the battery assembly is in a charging state, the input end of the first charging branch is in communication with the positive pole of the charging power source, the first switching device is disconnected, the second switching device is disconnected, and the third switching device is disconnected, The fourth switching device is turned off, the output end of the Nth charging branch is in communication with the negative terminal of the charging power source, and the fifth switching device is closed.
另一方面，本发明实施例提供了一种电池组充电方法，用于上述实施例中的电池组充电***，方法包括：检测电池集合体是否处于充电状态；若电池集合体处于充电状态，则控制第1条充电支路的输入端与充电电源的正极连通，第N条充电支路的输出端与充电电源的负极连通，第五开关器件闭合，除第五开关器件之外的开关器件均断开。In another aspect, an embodiment of the present invention provides a battery pack charging method, which is used in the battery pack charging system in the above embodiment, the method includes: detecting whether the battery assembly is in a charging state; and if the battery assembly is in a charging state, The input end of the charging branch of the first charging is connected to the positive pole of the charging power source, the output end of the Nth charging branch is connected to the negative pole of the charging power source, the fifth switching device is closed, and the switching devices except the fifth switching device are disconnect.
本发明实施例提供了一种电池组充电***和方法，该***包括顺序排列的N条充电支路。第1条充电支路的输入端与充电电源的正极连接，第1条充电支路的输出端与充电电源的负极通过第一开关器件连接。除第1条充电支路与第N条充电支路之外的剩余充电支路的输入端、输出端分别通过第二开关器件、第三开关器件与充电电源的正极、负极连接。第N条充电支路的输入端与充电电源的正极通过第四开关器件连接，第N条充电支路的输出端与充电电源的负极连接。第i条充电支路的输出端与第i+1条充电支路的输入端通过第五开关器件连接。通过控制各个开关器件断开或闭合，使得在电池集合体处于充电状态时，上述N充电支路串联，降低电池组充电回路的总充电电流。因此，采用支持较小充电电流的过流器件，也可以保证充电电流较大的电池组正常进行充电。Embodiments of the present invention provide a battery pack charging system and method, the system including N charging branches arranged in sequence. The input end of the first charging branch is connected to the positive pole of the charging power source, and the output end of the first charging branch is connected to the negative pole of the charging power source through the first switching device. The input end and the output end of the remaining charging branch except the first charging branch and the Nth charging branch are respectively connected to the positive pole and the negative pole of the charging power source through the second switching device and the third switching device. The input end of the Nth charging branch is connected to the positive pole of the charging power source through the fourth switching device, and the output end of the Nth charging branch is connected to the negative pole of the charging power source. The output end of the i-th charging branch is connected to the input end of the i+1th charging branch through the fifth switching device. By controlling the respective switching devices to open or close, the N charging branches are connected in series when the battery assembly is in a charged state, reducing the total charging current of the battery pack charging circuit. Therefore, with an overcurrent device that supports a small charging current, it is also possible to ensure that the battery pack with a large charging current is normally charged.
附图说明DRAWINGS
从下面结合附图对本发明的具体实施方式的描述中可以更好地理解本发明其中，相同或相似的附图标记表示相同或相似的特征。The invention may be better understood from the following description of the embodiments of the invention, and the same or the
图1为本发明一实施例中的一种电池组充电***的结构示意图； 1 is a schematic structural view of a battery pack charging system according to an embodiment of the present invention;
图2为本发明一实施例中的另一种电池组充电***的结构示意图；2 is a schematic structural diagram of another battery pack charging system according to an embodiment of the present invention;
图3为本发明一实施例的示例中的电池组充电***的结构示意图；3 is a schematic structural diagram of a battery pack charging system in an example of an embodiment of the present invention;
图4为本发明一实施例中的电池组充电方法的流程图；4 is a flow chart of a battery pack charging method according to an embodiment of the present invention;
图5为本发明另一实施例中的电池组充电方法的流程图；FIG. 5 is a flowchart of a battery pack charging method according to another embodiment of the present invention; FIG.
图6为本发明又一实施例中的电池组充电方法的流程图。FIG. 6 is a flow chart of a battery pack charging method according to still another embodiment of the present invention.
具体实施方式detailed description
下面将详细描述本发明的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本发明的全面理解。但是，对于本领域技术人员来说很明显的是，本发明可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本发明的示例来提供对本发明的更好的理解。本发明决不限于下面所提出的任何具体配置和算法，而是在不脱离本发明的精神的前提下覆盖了元素、部件和算法的任何修改、替换和改进。在附图和下面的描述中，没有示出公知的结构和技术，以便避免对本发明造成不必要的模糊。Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth However, it will be apparent to those skilled in the art that the present invention may be practiced without some of the details. The following description of the embodiments is merely provided to provide a better understanding of the invention. The present invention is in no way limited to any specific configurations and algorithms set forth below, but without departing from the spirit and scope of the invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessary obscuring the invention.
本发明实施例提供了一种电池组充电***和方法，能够利用现有的支持较小充电电流的过流器件，保证充电电流较大的电池组可以正常进行充电。具体的，可以通过在电池组的充电支路与充电电源的正极、充电电源的负极的连接处，以及各充电支路之间的连接处设置开关器件。在充电时，将多条充电支路由并联转化为串联。从而降低电池组充电回路中的总充电电流，避免所使用的支持较小充电电流的过流器件影响电池组的正常充电。需要说明的是，在本发明实施例中，为电池组充电相当于为电池组充电***中的电池集合体充电。Embodiments of the present invention provide a battery pack charging system and method, which can utilize an existing overcurrent device supporting a small charging current to ensure that a battery pack having a large charging current can be normally charged. Specifically, the switching device can be disposed at a connection between the charging branch of the battery pack and the anode of the charging power source, the cathode of the charging power source, and the charging branches. During charging, multiple charging branches are routed in parallel and converted into series. Thereby reducing the total charging current in the battery pack charging circuit, and avoiding the use of an overcurrent device supporting a smaller charging current to affect the normal charging of the battery pack. It should be noted that, in the embodiment of the present invention, charging the battery pack is equivalent to charging the battery assembly in the battery pack charging system.
本发明实施例中的电池组充电***包括充电电源的正极和充电电源的负极之间顺序排列的N条充电支路，N为大于或等于2的整数。The battery pack charging system in the embodiment of the present invention includes N charging branches sequentially arranged between the positive pole of the charging power source and the negative pole of the charging power source, and N is an integer greater than or equal to 2.
下面以电池组充电***包括3条充电支路为例进行说明。图1为本发明一实施例中的一种电池组充电***10的结构示意图。The following is an example in which the battery pack charging system includes three charging branches as an example. FIG. 1 is a schematic structural diagram of a battery pack charging system 10 according to an embodiment of the present invention.
如图1所示，充电电源的正极和充电电源的负极之间设有3条充电支路，分别为B1、B2和B3。也可以在3条充电支路的汇聚点与充电电源的 正极之间设置开关器件K6，在3条充电支路的汇聚点与充电电源的负极之间设置开关器件K7。可以通过控制开关器件K6和K7的开合状态，来控制是否进行充电。开关器件K6和K7闭合，则进行充电。开关器件K6和K7中的至少一个断开，则停止充电。As shown in Fig. 1, there are three charging branches between the positive pole of the charging power source and the negative pole of the charging power source, which are B1, B2 and B3, respectively. Can also be used at the convergence point of 3 charging branches and charging power A switching device K6 is provided between the positive electrodes, and a switching device K7 is provided between the convergence points of the three charging branches and the negative terminal of the charging power source. It is possible to control whether or not charging is performed by controlling the opening and closing states of the switching devices K6 and K7. When the switching devices K6 and K7 are closed, charging is performed. When at least one of the switching devices K6 and K7 is turned off, charging is stopped.
其中，第1条充电支路B1的输入端与充电电源的正极连接，第1条充电支路B1的输出端与充电电源的负极通过第一开关器件K1连接。第2条充电支路B2的输入端通过第二开关器件K2与充电电源的正极连接，第2条充电支路B2的输出端通过第三开关器件K3与充电电源的负极连接。第3条充电支路B3的输入端与充电电源的正极通过第四开关器件K4连接，第3条充电支路B3的输出端与充电电源的负极连接。在3条充电支路中，其中任意一条充电支路的输出端与下一条充电支路的输入端通过第五开关器件K5连接。也就是说，第i条充电支路的输出端与第i+1条充电支路的输入端通过第五开关器件K3连接，i为整数且1≤i＜N。比如，第1条充电支路B1的输出端与第2条充电支路B2的输入端通过第五开关器件K5连接，第2条充电支路B2的输出端与第3条充电支路B3的输入端通过第五开关器件K5连接。The input end of the first charging branch B1 is connected to the positive pole of the charging power source, and the output end of the first charging branch B1 is connected to the cathode of the charging power source via the first switching device K1. The input end of the second charging branch B2 is connected to the positive pole of the charging power source via the second switching device K2, and the output end of the second charging branch B2 is connected to the negative pole of the charging power source via the third switching device K3. The input end of the third charging branch B3 is connected to the positive pole of the charging power source via the fourth switching device K4, and the output end of the third charging branch B3 is connected to the negative pole of the charging power source. In the three charging branches, the output of any one of the charging branches is connected to the input of the next charging branch via the fifth switching device K5. That is to say, the output end of the ith charging branch and the input end of the i+1th charging branch are connected by the fifth switching device K3, i is an integer and 1 ≤ i < N. For example, the output end of the first charging branch B1 and the input end of the second charging branch B2 are connected by the fifth switching device K5, and the output end of the second charging branch B2 and the third charging branch B3 The input is connected via a fifth switching device K5.
上述每条充电支路均包括至少一个电池集合体。电池集合体可以聚集电量或放出电量。聚集电量即为充电，放出电量即为放电。如图1所示的示例中，每条充电支路包括两个电池集合体。Each of the above charging branches includes at least one battery assembly. The battery assembly can concentrate or discharge power. The accumulated power is the charge, and the discharge is the discharge. In the example shown in Figure 1, each charging branch includes two battery assemblies.
在电池集合体处于充电状态时，可使第1条充电支路B1的输入端与充电电源的正极连通，可使第一开关器件K1断开，可使第二开关器件K2断开，可使第三开关器件K3断开，可使第四开关器件K4断开，可使第3条充电支路B3(即第N条充电支路，N＝3)的输出端与充电电源的负极连通，可使第五开关器件K5闭合。在该种情况下，电池组充电***中的3条支路串联起来，则通过串联后的3条支路的电池组充电回路中的总充电电流，要远远小于通过并联的3条支路的电池组充电回路中的总充电电流。When the battery assembly is in the charging state, the input end of the first charging branch B1 can be connected to the positive terminal of the charging power source, the first switching device K1 can be disconnected, and the second switching device K2 can be disconnected. When the third switching device K3 is turned off, the fourth switching device K4 can be disconnected, so that the output end of the third charging branch B3 (ie, the Nth charging branch, N=3) is connected to the negative terminal of the charging power source. The fifth switching device K5 can be closed. In this case, the three branches in the battery pack charging system are connected in series, and the total charging current in the battery charging circuit through the three branches after the series is much smaller than the three branches through the parallel connection. The total charging current in the battery pack charging loop.
比如，设置每条充电支路中的充电电流为300A，在电池组充电回路中的过流器件能够支持600A的总充电电流。For example, to set the charging current in each charging branch to 300A, the overcurrent device in the battery charging circuit can support the total charging current of 600A.
现有技术中，3条充电支路并联，则电池组充电回路的总充电电流为 300A+300A+300A＝900A，已经超出了过流器件能够支持的总充电电流的范围，导致电池组中的电池集合体无法正常进行充电。In the prior art, when three charging branches are connected in parallel, the total charging current of the battery charging circuit is 300A+300A+300A=900A, which has exceeded the range of total charging current that the overcurrent device can support, causing the battery assembly in the battery pack to fail to charge properly.
在本发明实施例中，在电池集合体处于充电状态时，通过设置各个开关器件的断开和闭合，使得3条充电支路串联，则电池组充电回路的总充电电流为300A，在过流器件能够支持的总充电电流的范围内，使得电池组中的电池集合体可以正常进行充电。In the embodiment of the present invention, when the battery assembly is in the charging state, by setting the opening and closing of the respective switching devices, the three charging branches are connected in series, and the total charging current of the battery charging circuit is 300A, in the overcurrent. The range of total charge currents that the device can support allows the battery assembly in the battery pack to be properly charged.
需要说明的是，若电池组充电***包括4条或4条以上的充电支路，除第1条充电支路与第N条充电支路之外的剩余充电支路的输入端均通过第二开关器件与充电电源的正极连接，剩余充电支路的输出端均通过第三开关器件与充电电源的负极连接。It should be noted that, if the battery charging system includes four or more charging branches, the input terminals of the remaining charging branches except the first charging branch and the Nth charging branch pass through the second The switching device is connected to the positive pole of the charging power source, and the output ends of the remaining charging branches are connected to the negative pole of the charging power source through the third switching device.
比如，图2为本发明一实施例中的另一种电池组充电***的结构示意图。电池组充电***包括4条充电支路，分别为D1、D2、D3和D4。也可以在这4条充电支路的汇聚点与充电电源的正极之间设置开关器件K6，在这4条充电支路的汇聚点与充电电源的负极之间设置开关器件K7。可通过控制开关器件K6和K7的开合状态，来控制是否进行充电。开关器件K6和K7闭合，则进行充电。开关器件K6和K7中的至少一个断开，则停止充电。For example, FIG. 2 is a schematic structural diagram of another battery pack charging system according to an embodiment of the present invention. The battery pack charging system includes four charging branches, namely D1, D2, D3 and D4. It is also possible to provide a switching device K6 between the convergence point of the four charging branches and the positive terminal of the charging power source, and a switching device K7 is provided between the convergence point of the four charging branches and the negative terminal of the charging power source. Whether or not charging is performed can be controlled by controlling the opening and closing states of the switching devices K6 and K7. When the switching devices K6 and K7 are closed, charging is performed. When at least one of the switching devices K6 and K7 is turned off, charging is stopped.
其中，第1条充电支路D1的输入端与充电电源的正极连接，第1条充电支路D1的输出端与充电电源的负极通过第一开关器件K1连接。第1条充电支路D1的输出端与第2条充电支路的输入端通过第五开关器件K5连接。第2条充电支路D2的输入端通过第二开关器件K2与充电电源的正极连接，第2条充电支路D2的输出端通过第三开关器件K3与充电电源的负极连接。第2条充电支路D2的输出端与第3条充电支路D3的输入端通过第五开关器件K5连接。第3条充电支路D3的输入端通过第二开关器件K2与充电电源的正极连接，第3条充电支路D3的输出端通过第三开关器件K3与充电电源的负极连接。第3条充电支路D3的输出端与第4条充电支路D4的输入端通过第五开关器件K5连接。第4条充电支路D4的输入端与充电电源的正极通过第四开关器件K4连接，第4条充电支路D4的输出端与充电电源的负极连接。 The input end of the first charging branch D1 is connected to the positive pole of the charging power source, and the output end of the first charging branch D1 is connected to the cathode of the charging power source via the first switching device K1. The output end of the first charging branch D1 and the input end of the second charging branch are connected via a fifth switching device K5. The input end of the second charging branch D2 is connected to the positive pole of the charging power source through the second switching device K2, and the output end of the second charging branch D2 is connected to the negative pole of the charging power source through the third switching device K3. The output of the second charging branch D2 and the input of the third charging branch D3 are connected via a fifth switching device K5. The input end of the third charging branch D3 is connected to the positive pole of the charging power source through the second switching device K2, and the output end of the third charging branch D3 is connected to the negative pole of the charging power source through the third switching device K3. The output of the third charging branch D3 and the input of the fourth charging branch D4 are connected by a fifth switching device K5. The input end of the fourth charging branch D4 is connected to the positive pole of the charging power source via the fourth switching device K4, and the output end of the fourth charging branch D4 is connected to the negative pole of the charging power source.
在一个示例中，上述实施例中的第一开关器件、第二开关器件、第三开关器件、第四开关器件和第五开关器件的数目可以为一个，也可以为多个，在此并不限定。In one example, the number of the first switching device, the second switching device, the third switching device, the fourth switching device, and the fifth switching device in the above embodiment may be one or more, and is not limited.
值得一提的是，第1条充电支路的输入端与充电电源的正极可以直接连接，也可以通过开关器件连接。第N条充电支路的输出端与充电电源的负极可以直接连接，也可以通过开关器件连接。但需要注意的是，在电池集合体处于充电状态时，第1条充电支路与充电电源的正极连通，第N条充电支路与充电电源的负极连通。It is worth mentioning that the input end of the first charging branch can be directly connected to the positive pole of the charging power source, or can be connected through a switching device. The output of the Nth charging branch can be directly connected to the negative pole of the charging power source or can be connected through a switching device. However, it should be noted that when the battery assembly is in the charging state, the first charging branch is in communication with the positive pole of the charging power source, and the Nth charging branch is in communication with the negative pole of the charging power source.
本发明实施例提供了一种电池组充电***，该***包括顺序排列的N条充电支路。第1条充电支路的输入端与充电电源的正极连接，第1条充电支路的输出端与充电电源的负极通过第一开关器件连接。除第1条充电支路与第N条充电支路之外的剩余充电支路的输入端、输出端分别通过第二开关器件、第三开关器件与充电电源的正极、负极连接。第N条充电支路的输入端与充电电源的正极通过第四开关器件连接，第N条充电支路的输出端与充电电源的负极连接。第i条充电支路的输出端与第i+1条充电支路的输入端通过第五开关器件连接。通过控制各个开关器件断开或闭合，使得在电池集合体处于充电状态时，上述N条充电支路串联，降低电池组充电回路的总充电电流。因此，采用支持较小充电电流的过流器件，也可以保证充电电流较大的电池组正常进行充电。Embodiments of the present invention provide a battery pack charging system including N charging branches arranged in sequence. The input end of the first charging branch is connected to the positive pole of the charging power source, and the output end of the first charging branch is connected to the negative pole of the charging power source through the first switching device. The input end and the output end of the remaining charging branch except the first charging branch and the Nth charging branch are respectively connected to the positive pole and the negative pole of the charging power source through the second switching device and the third switching device. The input end of the Nth charging branch is connected to the positive pole of the charging power source through the fourth switching device, and the output end of the Nth charging branch is connected to the negative pole of the charging power source. The output end of the i-th charging branch is connected to the input end of the i+1th charging branch through the fifth switching device. By controlling the respective switching devices to be opened or closed, when the battery assembly is in a charging state, the above-mentioned N charging branches are connected in series to reduce the total charging current of the battery charging circuit. Therefore, with an overcurrent device that supports a small charging current, it is also possible to ensure that the battery pack with a large charging current is normally charged.
在本发明的另一实施例中，当电池集合体处于放电状态时，可使第1条充电支路的输入端与充电电源的正极连通，可使第一开关器件闭合，可使第二开关器件闭合，可使第三开关器件闭合，可使第四开关器件闭合，可使第N条充电支路的输出端与负极连通，可使第五开关器件断开。In another embodiment of the present invention, when the battery assembly is in a discharged state, the input end of the first charging branch can be connected to the positive terminal of the charging power source, and the first switching device can be closed to enable the second switch. The device is closed, the third switching device can be closed, the fourth switching device can be closed, and the output end of the Nth charging branch can be connected to the negative terminal to disconnect the fifth switching device.
在一个示例中，可以设定第一开关器件、第二开关器件、第三开关器件、第四开关器件和第五开关器件的断开或闭合的顺序。当电池集合体处于放电状态时，可使第五开关器件先断开，再使第一开关器件、第二开关器件、第三开关器件和第四开关器件均闭合。In one example, the order of opening or closing of the first switching device, the second switching device, the third switching device, the fourth switching device, and the fifth switching device may be set. When the battery assembly is in a discharged state, the fifth switching device can be turned off first, and then the first switching device, the second switching device, the third switching device, and the fourth switching device are both closed.
在电池集合体处于放电状态时，通过控制各个开关器件断开或闭合，使得电池组充电***中的N条充电支路并联，并联的每一条充电支路均可 向外输出电量。When the battery assembly is in a discharging state, by controlling each of the switching devices to be opened or closed, the N charging branches in the battery charging system are connected in parallel, and each charging branch in parallel can be Output power to the outside.
需要说明的是，在上述电池组充电***中的开关器件中，第一开关器件的开合状态、第二开关器件的开合状态、第三开关器件的开合状态和第四开关器件的开合状态，与第五开关器件的开合状态相反，能够形成互斥状态。比如，第一开关器件、第二开关器件、第三开关器件和第四开关器件中的任意一个开关器件处于闭合状态，第五开关器件处于断开状态。或者，第五开关器件处于闭合状态，第一开关器件、第二开关器件、第三开关器件和第四开关器件均处于断开状态。从而防止互斥状态的开关器件同时闭合造成充电回路或放电回路发生短路。It should be noted that, in the switching device in the above battery charging system, the opening and closing state of the first switching device, the opening and closing state of the second switching device, the opening and closing state of the third switching device, and the opening of the fourth switching device In the combined state, in contrast to the opening and closing state of the fifth switching device, a mutually exclusive state can be formed. For example, any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is in a closed state, and the fifth switching device is in an off state. Alternatively, the fifth switching device is in a closed state, and the first switching device, the second switching device, the third switching device, and the fourth switching device are all in an off state. Therefore, the switching devices in the mutually exclusive state are prevented from being simultaneously closed, causing a short circuit in the charging circuit or the discharging circuit.
在本发明的又一实施例的一个示例中，电池组充电***还可以包括第一粘连检测模块和第一控制模块。In an example of yet another embodiment of the present invention, the battery pack charging system may further include a first adhesion detecting module and a first control module.
第一粘连检测模块，被配置为在电池集合体充电前，检测第一开关器件、第二开关器件、第三开关器件和第四开关器件中的任一开关器件是否闭合。The first adhesion detecting module is configured to detect whether any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed before charging the battery assembly.
第一控制模块，被配置为若第一开关器件、第二开关器件、第三开关器件和第四开关器件中的任意一个开关器件闭合，则禁止电池集合体充电。The first control module is configured to disable charging of the battery assembly if any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed.
比如，如图1和图2所示，若第一开关器件K1、第二开关器件K2、第三开关器件K3和第四开关器件K4中的任意一个开关器件闭合，则使开关器件K6和/或K7断开，禁止电池集合体充电。For example, as shown in FIGS. 1 and 2, if any one of the first switching device K1, the second switching device K2, the third switching device K3, and the fourth switching device K4 is closed, the switching device K6 and / Or K7 is disconnected, and the battery assembly is prohibited from charging.
又比如，如图1和图2所示，若第一开关器件K1、第二开关器件K2、第三开关器件K3和第四开关器件K4中的任意一个开关器件闭合，则使第五开关器件K5断开，从而禁止电池集合体充电。For another example, as shown in FIG. 1 and FIG. 2, if any one of the first switching device K1, the second switching device K2, the third switching device K3, and the fourth switching device K4 is closed, the fifth switching device is enabled. K5 is disconnected, thereby disabling the charging of the battery assembly.
若在电池集合体的充电过程中，第一开关器件、第二开关器件、第三开关器件和第四开关器件中的任意一个开关器件闭合，则多条充电支路无法串联，可能会影响电池组的正常充电。If any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed during charging of the battery assembly, the plurality of charging branches cannot be connected in series, which may affect the battery The group is charged normally.
在本发明的又一实施例的另一个示例中，电池组充电***还可以包括第二粘连检测模块和第二控制模块。In another example of yet another embodiment of the present invention, the battery pack charging system may further include a second adhesion detection module and a second control module.
第二粘连检测模块，被配置为在电池集合体放电前，检测第五开关器件是否闭合。 The second adhesion detecting module is configured to detect whether the fifth switching device is closed before the battery assembly is discharged.
第二控制模块，被配置为若第五开关器件闭合，则禁止电池集合体进行放电。The second control module is configured to inhibit the battery assembly from discharging if the fifth switching device is closed.
若在电池集合体的放电过程中，第五开关器件闭合，则多条充电支路串联，会造成充电支路产生短路现象，从而会影响电池组的正常放电。If the fifth switching device is closed during the discharge of the battery assembly, the plurality of charging branches are connected in series, which may cause a short circuit in the charging branch, thereby affecting the normal discharge of the battery pack.
需要说明的是，在上述实施例中，第五开关器件可以连接有保险丝。若第i条充电支路与第i+1条充电支路之间连通时通过的电流过大，保险丝熔断。可以在充电回路产生过流现象或短路现象的情况下，使充电回路断开，从而保护电池组充电***。It should be noted that, in the above embodiment, the fifth switching device may be connected with a fuse. If the current passing between the i-th charging branch and the i+1th charging branch is too large, the fuse is blown. The charging circuit can be disconnected in the event of an overcurrent or short circuit in the charging circuit, thereby protecting the battery pack charging system.
比如，图3为本发明一实施例的示例中的电池组充电***10的结构示意图。图3与图1的不同之处在于，第1条充电支路B1的输出端与第五开关器件K5之间可以通过保险丝f1连接，第2条充电支路B2的输出端与第五开关器件K5之间可以通过保险丝f2连接。For example, FIG. 3 is a schematic structural diagram of a battery pack charging system 10 in an example of an embodiment of the present invention. 3 is different from FIG. 1 in that the output end of the first charging branch B1 and the fifth switching device K5 can be connected by a fuse f1, and the output end of the second charging branch B2 and the fifth switching device K5 can be connected by fuse f2.
或者，保险丝也可以设置在充电支路的输入端与第五开关器件之间，比如，第五开关器件K5与第2条充电支路B2的输入端通过保险丝连接，第五开关器件K5与第3条充电支路B3的输入端通过保险丝连接。Alternatively, the fuse may be disposed between the input end of the charging branch and the fifth switching device. For example, the fifth switching device K5 and the input end of the second charging branch B2 are connected by a fuse, and the fifth switching device K5 and the The input terminals of the three charging branches B3 are connected by a fuse.
上述实施例中的开关器件(包括第一开关器件、第二开关器件、第三开关器件、第四开关器件和第五开关器件)包括接触器，也可以为具有开关功能的其他开关器件。具体的，在一个示例中，接触器可以为继电器。若继电器安装在高压电路中，可以将继电器设置在高压盒内。The switching device (including the first switching device, the second switching device, the third switching device, the fourth switching device, and the fifth switching device) in the above embodiments includes a contactor, and may also be other switching devices having a switching function. Specifically, in one example, the contactor can be a relay. If the relay is installed in a high voltage circuit, the relay can be placed in a high voltage box.
值得一提的是，在一个示例中，电池集合体可以包括电池单体、电池模组或电池包。电池集合体具体可以根据工作场景来选择，比如，若电池组充电***用于为电动车的电池组进行充电，则电池集合体可为电池包，为电动车提供更充足的电量。It is worth mentioning that, in one example, the battery assembly may include a battery cell, a battery module, or a battery pack. The battery assembly can be selected according to the working scenario. For example, if the battery pack charging system is used to charge the battery pack of the electric vehicle, the battery assembly can be a battery pack to provide more electric power for the electric vehicle.
图4为本发明一实施例中的电池组充电方法的流程图。如图4所示，电池组充电方法包括步骤201-步骤202。4 is a flow chart of a battery pack charging method in accordance with an embodiment of the present invention. As shown in FIG. 4, the battery pack charging method includes steps 201-202.
在步骤201中，检测电池集合体是否处于充电状态。In step 201, it is detected whether the battery assembly is in a charged state.
在一个示例中，可以通过检测是否存在CC2充电信号，来检测电池集合体是否处于充电状态。若存在CC2充电信号，则电池集合体处于充电状态。 In one example, it may be detected whether the battery assembly is in a charged state by detecting the presence or absence of a CC2 charging signal. If there is a CC2 charging signal, the battery assembly is in a charged state.
在步骤202中，若电池集合体处于充电状态，则控制第1条充电支路的输入端与充电电源的充电电源的正极连通，第N条充电支路的输出端与充电电源的负极连通，第五开关器件闭合，除第五开关器件之外的开关器件均断开。In step 202, if the battery assembly is in a charging state, the input end of the first charging branch is controlled to communicate with the positive terminal of the charging power source of the charging power source, and the output end of the Nth charging branch is connected to the negative terminal of the charging power source. The fifth switching device is closed, and the switching devices other than the fifth switching device are turned off.
也就是说，要控制第1条充电支路的输入端与充电电源的正极连通。第i条充电支路的输出端与第i+1条充电支路的输入端连通。第N条充电支路的输出端与充电电源的负极连通。That is to say, the input end of the first charging branch is controlled to communicate with the positive terminal of the charging power source. The output end of the i-th charging branch is in communication with the input end of the i+1th charging branch. The output end of the Nth charging branch is in communication with the negative terminal of the charging power source.
本发明实施例提供一种电池组充电方法，应用于电池组充电***。若电池集合体处于充电状态，则控制第1条充电支路的输入端与充电电源的正极连通，第N条充电支路的输出端与充电电源的负极连通，第五开关器件闭合，除第五开关器件之外的开关器件均断开。从而使电池组充电***中所有充电支路串联，降低了电池组充电回路的总充电电流。因此，采用支持较小充电电流的过流器件，也可以保证充电电流较大的电池组正常进行充电。Embodiments of the present invention provide a battery pack charging method, which is applied to a battery pack charging system. If the battery assembly is in a charging state, controlling the input end of the first charging branch to communicate with the positive pole of the charging power source, the output end of the Nth charging branch is in communication with the negative pole of the charging power source, and the fifth switching device is closed, except the The switching devices other than the five-switch device are disconnected. Thereby all the charging branches in the battery pack charging system are connected in series, which reduces the total charging current of the battery pack charging circuit. Therefore, with an overcurrent device that supports a small charging current, it is also possible to ensure that the battery pack with a large charging current is normally charged.
图5为本发明另一实施例中的电池组充电方法的流程图。图5与图4的不同之处在于，图5所示的电池组充电方法还包括步骤203-步骤204。FIG. 5 is a flowchart of a battery pack charging method according to another embodiment of the present invention. 5 is different from FIG. 4 in that the battery pack charging method shown in FIG. 5 further includes steps 203 to 204.
在步骤203中，检测电池集合体是否处于放电状态。In step 203, it is detected whether the battery assembly is in a discharged state.
在一个示例中，可以通过检测是否存在放电信号，来检测电池集合体是否处于放电状态。若存在放电信号，则电池集合体处于放电状态。In one example, whether the battery assembly is in a discharged state can be detected by detecting whether a discharge signal is present. If there is a discharge signal, the battery assembly is in a discharged state.
在步骤204中，若电池集合体处于放电状态，则控制第1条充电支路的输入端与充电电源的正极连通，第N条充电支路的输出端与充电电源的负极连通，第五开关器件断开，除第五开关器件之外的开关器件均闭合。In step 204, if the battery assembly is in a discharged state, the input end of the first charging branch is controlled to communicate with the positive terminal of the charging power source, and the output end of the Nth charging branch is connected to the negative terminal of the charging power source, and the fifth switch The device is turned off and the switching devices except the fifth switching device are closed.
也就是说，要控制所有充电支路的输入端均与充电电源的正极连通，所有充电支路的输出端均与充电电源的负极连通。一条充电支路与下一条充电支路断开，并不导通。从而保证电池组充电***中的电池集合体放电的情况下，多条充电支路并联。That is to say, the input terminals of all the charging branches are controlled to communicate with the positive pole of the charging power source, and the output ends of all the charging branches are connected with the negative pole of the charging power source. One charging branch is disconnected from the next charging branch and is not conducting. In order to ensure that the battery assembly in the battery pack charging system is discharged, a plurality of charging branches are connected in parallel.
需要说明的是，步骤203和步骤204可以在步骤202之后执行，也可以在步骤201之前执行，在此并不限制步骤203和步骤204与其他步骤的执行顺序。 It should be noted that step 203 and step 204 may be performed after step 202, or may be performed before step 201, and the order of execution of step 203 and step 204 and other steps is not limited herein.
图6为本发明又一实施例中的电池组充电方法的流程图。图6与图5的不同之处在于，图6所示的电池组充电方法还可包括步骤205-步骤208。FIG. 6 is a flow chart of a battery pack charging method according to still another embodiment of the present invention. 6 is different from FIG. 5 in that the battery pack charging method shown in FIG. 6 may further include steps 205 to 208.
在步骤205中，在电池集合体充电前，检测第一开关器件、第二开关器件、第三开关器件和第四开关器件中的任一开关器件是否闭合。In step 205, it is detected whether any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed before the battery assembly is charged.
为了避免开关器件在应该断开的时候闭合而发生粘连，在电池集合体充电前，即电池集合体即将充电前，检测可能使充电支路并联的开关器件是否闭合。若可能使充电支路并联的开关器件中的任意一个开关器件闭合，则禁止电池集合体充电，防止电池组充电回路的总充电电流过大，影响电池组的正常充电。In order to prevent the switching device from being closed when the switch device should be closed, the switching device that may cause the charging branch to be connected in parallel is detected before the battery assembly is charged, that is, immediately before the battery assembly is charged. If it is possible to close any one of the switching devices in parallel with the charging branch, the battery assembly is prohibited from being charged, and the total charging current of the battery charging circuit is prevented from being excessively large, which affects the normal charging of the battery pack.
在步骤206中，若第一开关器件、第二开关器件、第三开关器件和第四开关器件中的任一开关器件闭合，则禁止电池集合体充电。In step 206, if any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed, charging of the battery assembly is prohibited.
在步骤207中，在电池集合体放电前，检测第五开关器件是否闭合。In step 207, it is detected whether the fifth switching device is closed before the battery assembly is discharged.
为了避免开关器件在应该断开的时候闭合而发生粘连，在电池集合体放电前，即电池集合体即将放电前，检测可能使充电支路串联的开关器件是否闭合。若可能使充电支路串联的开关器件闭合，则禁止电池集合体放电，避免影响电池组的正常放电。In order to prevent the switching device from being closed when the switch device should be closed, the switching device that may cause the charging branch to be connected is closed before the battery assembly is discharged, that is, immediately before the battery assembly is discharged. If it is possible to close the switching device in series with the charging branch, the battery assembly is prohibited from being discharged to avoid affecting the normal discharge of the battery pack.
在步骤208中，若第五开关器件闭合，则禁止电池集合体放电。In step 208, if the fifth switching device is closed, the battery assembly is inhibited from discharging.
需要明确的是，本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同或相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。其中方法实施例描述得比较简单，相关之处请参见***实施例的说明部分。本发明并不局限于上文所描述并在图中示出的特定步骤和结构。本领域的技术人员可以在领会本发明的精神之后，作出各种改变、修改和添加，或者改变步骤之间的顺序。并且，为了简明起见，这里省略对已知方法技术的详细描述。It is to be understood that the various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the difference from other embodiments. Where. The method embodiment is described in a relatively simple manner. For related information, please refer to the description part of the system embodiment. The invention is not limited to the specific steps and structures described above and illustrated in the drawings. A person skilled in the art can make various changes, modifications and additions, or change the order between the steps after the spirit of the invention. Also, a detailed description of known method techniques is omitted herein for the sake of brevity.
上述实施例中的功能模块(如第一粘连检测模块、第一控制模块、第二粘连检测模块和第二控制模块)可以实现为硬件、软件、固件或者它们的组合。当以硬件方式实现时，其可以例如是电子电路、专用集成电路(ASIC)、适当的固件、插件、功能卡等等。当以软件方式实现时，本发明的元素是被用于执行所需任务的程序或者代码段。程序或者代码段可以 存储在机器可读介质中，或者通过载波中携带的数据信号在传输介质或者通信链路上传送。“机器可读介质”可以包括能够存储或传输信息的任何介质。 The functional modules (such as the first adhesion detection module, the first control module, the second adhesion detection module, and the second control module) in the above embodiments may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, plug-ins, function cards, and the like. When implemented in software, the elements of the present invention are programs or code segments that are used to perform the required tasks. Program or code segment can It is stored in a machine readable medium or transmitted over a transmission medium or communication link by a data signal carried in a carrier wave. A "machine-readable medium" can include any medium that can store or transfer information.

Claims (12)

  1. 一种电池组充电***，其特征在于，包括在充电电源的正极和所述充电电源的负极之间顺序排列的N条充电支路，N为大于或等于2的整数，其中：A battery pack charging system, comprising: N charging branches sequentially arranged between a positive pole of a charging power source and a negative pole of the charging power source, wherein N is an integer greater than or equal to 2, wherein:
    第1条充电支路的输入端与所述充电电源的正极连接，第1条充电支路的输出端与所述充电电源的负极通过第一开关器件连接；The input end of the first charging branch is connected to the positive pole of the charging power source, and the output end of the first charging branch is connected to the negative pole of the charging power source through the first switching device;
    除第1条充电支路与第N条充电支路之外的剩余充电支路的输入端均通过第二开关器件与所述充电电源的正极连接，所述剩余充电支路的输出端均通过第三开关器件与所述充电电源的负极连接；The input terminals of the remaining charging branches except the first charging branch and the Nth charging branch are connected to the positive pole of the charging power source through the second switching device, and the output ends of the remaining charging branches pass The third switching device is connected to the negative pole of the charging power source;
    第N条充电支路的输入端与所述充电电源的正极通过第四开关器件连接，第N条充电支路的输出端与所述充电电源的负极连接；The input end of the Nth charging branch is connected to the positive pole of the charging power source through the fourth switching device, and the output end of the Nth charging branch is connected to the negative pole of the charging power source;
    第i条充电支路的输出端与第i+1条充电支路的输入端通过第五开关器件连接，i为整数，且1≤i＜N；The output end of the ith charging branch is connected to the input end of the i+1th charging branch through the fifth switching device, i is an integer, and 1 ≤ i < N;
    所述N条充电支路中的每条充电支路包括至少一个电池集合体；并且Each of the N charging branches includes at least one battery assembly;
    当所述电池集合体处于充电状态时，使所述第1条充电支路的输入端与所述充电电源的正极连通，使所述第一开关器件断开，使所述第二开关器件断开，使所述第三开关器件断开，使所述第四开关器件断开，使所述第N条充电支路的输出端与所述充电电源的负极连通，使所述第五开关器件闭合。When the battery assembly is in a charging state, the input end of the first charging branch is connected to the positive terminal of the charging power source, the first switching device is disconnected, and the second switching device is disconnected Turning on, disconnecting the third switching device, disconnecting the fourth switching device, and causing an output end of the Nth charging branch to communicate with a negative terminal of the charging power source, so that the fifth switching device closure.
  2. 根据权利要求1所述的电池组充电***，其特征在于，当所述电池集合体处于放电状态时，使所述第1条充电支路的输入端与所述充电电源的正极连通，使所述第一开关器件闭合，使所述第二开关器件闭合，使所述第三开关器件闭合，使所述第四开关器件闭合，使所述第N条充电支路的输出端与所述充电电源的负极连通，使所述第五开关器件断开。The battery pack charging system according to claim 1, wherein when the battery assembly is in a discharged state, an input end of the first charging branch is connected to a positive electrode of the charging power source, The first switching device is closed, the second switching device is closed, the third switching device is closed, the fourth switching device is closed, and the output of the Nth charging branch is charged The negative pole of the power source is connected to disconnect the fifth switching device.
  3. 根据权利要求1所述的电池组充电***，其特征在于，所述第一开关器件、所述第二开关器件、所述第三开关器件和所述第四开关器件中的任意一个开关器件处于闭合状态，并且所述第五开关器件处于断开状态；The battery pack charging system according to claim 1, wherein any one of said first switching device, said second switching device, said third switching device, and said fourth switching device is a closed state, and the fifth switching device is in an off state;
    或者， Or,
    所述第五开关器件处于闭合状态，并且所述第一开关器件、所述第二开关器件、所述第三开关器件和所述第四开关器件均处于断开状态。The fifth switching device is in a closed state, and the first switching device, the second switching device, the third switching device, and the fourth switching device are all in an off state.
  4. 根据权利要求1所述的电池组充电***，其特征在于，还包括第一粘连检测模块和第一控制模块；The battery pack charging system according to claim 1, further comprising a first adhesion detecting module and a first control module;
    所述第一粘连检测模块，被配置为在所述电池集合体充电前，检测所述第一开关器件、所述第二开关器件、所述第三开关器件和所述第四开关器件中的任一开关器件是否闭合；The first adhesion detecting module is configured to detect, among the first switching device, the second switching device, the third switching device, and the fourth switching device, before charging the battery assembly Whether any of the switching devices are closed;
    所述第一控制模块，被配置为若所述第一开关器件、所述第二开关器件、所述第三开关器件和所述第四开关器件中的任意一个开关器件闭合，则禁止所述电池集合体充电。The first control module is configured to disable the one of the first switching device, the second switching device, the third switching device, and the fourth switching device if the switching device is closed The battery assembly is charged.
  5. 根据权利要求2所述的电池组充电***，其特征在于，还包括第二粘连检测模块和第二控制模块；The battery pack charging system according to claim 2, further comprising a second adhesion detecting module and a second control module;
    所述第二粘连检测模块，被配置为在所述电池集合体放电前，检测所述第五开关器件是否闭合；The second adhesion detecting module is configured to detect whether the fifth switching device is closed before discharging the battery assembly;
    所述第二控制模块，被配置为若所述第五开关器件闭合，则禁止所述电池集合体进行放电。The second control module is configured to prohibit the battery assembly from discharging if the fifth switching device is closed.
  6. 根据权利要求1所述的电池组充电***，其特征在于，所述第五开关器件连接有保险丝。The battery pack charging system according to claim 1, wherein said fifth switching device is connected to a fuse.
  7. 根据权利要求1-3中任意一项所述的电池组充电***，其特征在于，所述开关器件包括接触器。A battery pack charging system according to any one of claims 1 to 3, wherein the switching device comprises a contactor.
  8. 根据权利要求1、4或5中任意一项所述的电池组充电***，其特征在于，所述电池集合体包括电池单体、电池模组或电池包。The battery pack charging system according to any one of claims 1 to 4, wherein the battery assembly comprises a battery unit, a battery module or a battery pack.
  9. 一种电池组充电方法，其特征在于，用于如权利要求1所述的电池组充电***，所述方法包括：A battery pack charging method, characterized by the battery pack charging system of claim 1, the method comprising:
    检测所述电池集合体是否处于充电状态；Detecting whether the battery assembly is in a charging state;
    若所述电池集合体处于充电状态，则控制所述第1条充电支路的输入端与所述充电电源的正极连通，所述第N条充电支路的输出端与所述充电电源的负极连通，所述第五开关器件闭合，并且除所述第五开关器件之外的开关器件均断开。 And if the battery assembly is in a charging state, controlling an input end of the first charging branch to communicate with a positive pole of the charging power source, an output end of the Nth charging branch and a negative pole of the charging power source In communication, the fifth switching device is closed, and the switching devices other than the fifth switching device are turned off.
  10. 根据权利要求9所述的电池组充电方法，其特征在于，还包括：The battery pack charging method according to claim 9, further comprising:
    检测所述电池集合体是否处于放电状态；Detecting whether the battery assembly is in a discharged state;
    若所述电池集合体处于放电状态，则控制所述第1条充电支路的输入端与所述充电电源的正极连通，所述第N条充电支路的输出端与所述充电电源的负极连通，所述第五开关器件断开，并且除所述第五开关器件之外的开关器件均闭合。And if the battery assembly is in a discharged state, controlling an input end of the first charging branch to communicate with a positive pole of the charging power source, an output end of the Nth charging branch and a negative pole of the charging power source In communication, the fifth switching device is turned off, and the switching devices other than the fifth switching device are all closed.
  11. 根据权利要求9所述的电池组充电方法，其特征在于，还包括：The battery pack charging method according to claim 9, further comprising:
    在所述电池集合体充电前，检测所述第一开关器件、所述第二开关器件、所述第三开关器件和所述第四开关器件中的任一开关器件是否闭合；Detecting whether any one of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed before charging the battery assembly;
    若所述第一开关器件、所述第二开关器件、所述第三开关器件和所述第四开关器件中的任一开关器件闭合，则禁止所述电池集合体充电。If the switching device of the first switching device, the second switching device, the third switching device, and the fourth switching device is closed, charging of the battery assembly is prohibited.
  12. 根据权利要求10所述的电池组充电方法，其特征在于，还包括：The battery pack charging method according to claim 10, further comprising:
    在所述电池集合体放电前，检测所述第五开关器件是否闭合；Detecting whether the fifth switching device is closed before discharging the battery assembly;
    若所述第五开关器件闭合，则禁止所述电池集合体放电。 If the fifth switching device is closed, the battery assembly is inhibited from discharging.
PCT/CN2017/093372 2017-05-19 2017-07-18 Battery pack charging system and method WO2018209786A1 (en)

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