CN209904535U

CN209904535U - Charging control device

Info

Publication number: CN209904535U
Application number: CN201920615307.0U
Authority: CN
Inventors: 葛武健; 苏清波; 沈春健
Original assignee: Falco Sai (taicang) Automotive Parts Co Ltd
Current assignee: Falco Sai (taicang) Automotive Parts Co Ltd; Ficosa International Taicang Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-01-07
Anticipated expiration: 2029-04-30

Abstract

The utility model provides a charge control device, include: an input terminal including a positive input pin and a negative output pin; an output terminal including a positive output pin and a negative input pin; a main positive contactor connected between the positive input pin and the positive output pin; a main negative contactor connected between the negative input pin and the negative output pin; a main control chip coupled with the main positive contactor and the main negative contactor; the collision detection module is coupled with the main control chip; and the main control chip controls to cut off at least one of the main positive contactor and the main negative contactor to disconnect the conductive connection between the input terminal and the output terminal when the acceleration detected by the collision detection module exceeds a first preset value. The embodiment of the utility model provides a charge control device can be at the lithium cell in charging process, when the car is collided by the foreign object, in time suspend the operation of charging, avoids the emergence of potential safety hazard.

Description

Charging control device

Technical Field

The utility model relates to a battery charging equipment technical field especially relates to a charge control device.

Background

The power of the new energy automobile is derived from a power lithium battery. When the energy consumption of the lithium battery reaches a low value, the lithium battery needs to be charged. Due to the inconsistency of the lithium batteries, the electrochemical reaction is easily influenced by environmental factors, and the like, so that the potential safety charging hazard of the electric automobile is caused. For example, when a lithium battery is charged and a vehicle is collided with by a foreign object, if the charging operation is not stopped in time, a safety accident may be caused.

SUMMERY OF THE UTILITY MODEL

Based on aforementioned prior art defect, the embodiment of the utility model provides a charge control device, it can be at the lithium cell in charging process, when the car is collided by the foreign object, in time suspend the operation of charging, avoids the emergence of potential safety hazard.

In order to achieve the above object, the present invention provides the following technical solutions.

A charge control device comprising:

an input terminal for connection with a charging power source, comprising: a positive input pin and a negative output pin;

an output terminal for connection with a battery, comprising: a positive output pin and a negative input pin;

a main positive contactor connected between the positive input pin and the positive output pin;

the main negative contactor is connected between the negative input pin and the negative output pin;

the main control chip is in signal connection with the main positive contactor and the main negative contactor;

a collision detection module coupled with the main control chip; and the main control chip controls to cut off at least one of the main positive contactor and the main negative contactor to disconnect the conductive connection between the input terminal and the output terminal when the acceleration detected by the collision detection module exceeds a first preset threshold value.

Preferably, a current limiting module is connected between the positive input pin and the positive output pin, and the current limiting module is connected in parallel with the main positive contactor; the current limiting module comprises a pre-charging relay and a pre-charging suppression resistor, and the pre-charging relay is in signal connection with the main control chip.

Preferably, the collision detection module includes a first acceleration sensor for detecting an acceleration of the charging control apparatus.

Preferably, the charging control device is configured to be disposed on a vehicle;

the collision detection module further comprises a second acceleration sensor for detecting the acceleration of the automobile.

Preferably, the main positive contactor, the main negative contactor and the main control chip are accommodated in the shell;

the charge control device further includes: the temperature detection module is coupled with the main control chip and used for detecting the temperature in the shell; and the main control chip controls to cut off at least one of the main positive contactor and the main negative contactor when the temperature detection module detects that the temperature in the shell reaches a second preset threshold value.

Preferably, the main positive contactor and the main negative contactor are provided with adhesion detection modules for detecting the adhesion state of the contacts of the main positive contactor and the main negative contactor; the adhesion detection module is in signal connection with the main control chip.

Detect the configuration through the collision detection module that sets up the utility model discloses whether charge control device's car receives collision or striking, and then blocks charging source and continue to charge to the battery through cutting off at least one in main positive contactor and the main negative contactor. Therefore, safety accidents caused by displacement of related charging equipment due to collision or impact on the automobile can be avoided.

Drawings

Fig. 1 is a circuit topology diagram of a charging control device according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiment of the utility model provides a charge control device is used for the configuration on the car, connects between charging source and the battery of waiting to charge (including but not limited to the lithium cell) for break off the electrically conductive connection between charging source and the battery when taking place the specific case, in order to suspend the operation of charging, avoid the incident.

As shown in fig. 1, the charge control device may include an input terminal 1 for connection with a charging power source and an output terminal 2 for connection with a secondary battery. The input terminal 1 includes a positive input pin 101 and a negative output pin 102, and the output terminal 2 includes a positive output pin 201 and a negative input pin 202.

A main positive contactor 3 is connected between the positive input pin 101 and the positive output pin 201, and a main negative contactor 4 is connected between the negative input pin 202 and the negative output pin 102 in the same manner. The main positive contactor 3 and the main negative contactor 4 are in signal connection with the main control chip 5 and are used for controlling the opening or closing of the main positive contactor 3 and the main negative contactor 4.

The main control chip 5 is coupled with a collision detection module 6, which includes at least a first acceleration sensor 601 for detecting a relative acceleration between the charging control device and the automobile, and further may include a second acceleration sensor 602 for detecting a vehicle acceleration of the automobile.

The utility model discloses charge control device includes casing (not shown), and input terminal 1 and output terminal 2 are fixed on the casing, and main positive contactor 3, main negative contactor 4, main control chip 5 and collision detection module 6 are acceptd in the casing. The collision detection module 6 is fixed in position relative to the housing, and the charging control device is fixed to the vehicle via the housing. Thus, the relative position of the collision detecting module 6 to the car is also fixed.

During normal charging, a charging loop is formed among the input terminal 1, the output terminal 2, the charging power supply and the storage battery. When the vehicle is collided or bumped, the collision detection module 6 detects that at least one of the rate of change of the speed of the charge control device (i.e. the acceleration of the charge control device) and the rate of change of the overall speed (i.e. the acceleration of the vehicle) exceeds a first predetermined threshold, and then controls to cut off at least one of the main positive contactor 3 and the main negative contactor 4 to break the conductive connection between the input terminal 1 and the output terminal 2.

In this way, when the automobile is collided or bumped, the charging power source can be blocked from continuing to charge the storage battery by switching off at least one of the main positive contactor 3 and the main negative contactor 4. Therefore, safety accidents caused by displacement of related charging equipment due to collision or impact on the automobile can be avoided.

Since the charge control device is subjected to overcurrent during charging, the temperature inside the case may rise. And the temperature in the shell is too high, so that the normal charging is influenced, and potential safety hazards exist.

Therefore, a temperature detection module 7 for detecting the temperature inside the case is coupled to the main control chip 5. When the temperature detection module 7 detects that the temperature in the housing reaches a second predetermined threshold value, the main control chip 5 controls to switch off at least one of the main positive contactor 3 and the main negative contactor 4, thereby suspending the charging operation.

The first threshold value and the second threshold value of setting for can adjust according to actual conditions, the embodiment of the utility model provides a do not restrict this.

In general, the charging voltage is relatively high (generally up to 500V), and the rear charging load, i.e. the storage battery, is equivalent to a capacitor. Therefore, if the main positive contactor 3 and the main negative contactor 4 are closed at the same time, the equivalent capacitance is turned on, thereby generating a large current instantaneously, resulting in damage to the main positive contactor 3.

Therefore, in order to protect the main positive contact 3, a current limiting module 8 may be connected between the positive input pin 101 and the positive output pin 201, the current limiting module 8 being connected in parallel with the main positive contact 3. The current limiting module 8 comprises a pre-charging relay 801 and a pre-charging suppression resistor 802, wherein the pre-charging relay 801 is in signal connection with the main control chip 5.

Therefore, before the main positive contactor 3 is closed, the main control chip 5 controls the pre-charging relay 801 and the pre-charging suppression resistor 802 to be closed in advance to charge the capacitor, and after the capacitor is fully charged, the pre-charging relay 801 is opened to close the main positive contactor 3, so that the instant large current impact is reduced.

As described above, an excessive current flows through the main positive contactor 3 and the main negative contactor 4 due to a large charging voltage. Therefore, the excessive current may cause the contacts of the main positive contactor 3 and the main negative contactor 4 to be melted by heat and to be stuck. Thus, when the charging circuit needs to be disconnected after the charging is finished, the charging circuit may not be disconnected due to the sticking of the contacts.

In order to avoid that the charging circuit cannot be disconnected due to the adhesion of the contacts of the contactor, the main positive contactor 3 and the main negative contactor 4 may be configured with an adhesion detection module 9 for detecting the adhesion state of the contacts of the main positive contactor 3 and the main negative contactor 4. The adhesion detection module 9 is in signal connection with the main control chip 5. The adhesion detection module 9 detects the contact states of the main positive contactor 3 and the main negative contactor 4 before the action, thereby avoiding the risk.

Likewise, the adhesion detection module 9 may take any suitable existing configuration. For example, known examples including, but not limited to, CN203135386U or CN103022959A may be used, and the present invention is not limited thereto.

Furthermore, the utility model discloses charge control device can also include high-pressure interlocking switch 10, and high-pressure interlocking switch 10 forms the return circuit with the high-pressure device of whole car. When the charging control device is disassembled, the charging control device is disconnected, and the safety is ensured.

Further, other components are coupled to the main control chip 5, such as, but not limited to, a power SUPPLY module (SUPPLY), a signal port (CAN), and a RESET module (RESET) as illustrated in fig. 1. The energy supply module is used for supplying electric energy for the operation of the main control chip 5. The signal port is used for being connected with an ECU of an automobile to realize signal interaction with the ECU. The reset module is used for restarting the main control chip 5.

Of course, the charging control device of the embodiment of the present invention may further include other components. For clearly and briefly explaining the technical solution provided by the present embodiment, the above parts will not be described again, and the drawings in the specification are also simplified accordingly. It should be understood, however, that the embodiments of the present application are not limited in scope thereby.

It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is shown between the two, and no indication or suggestion of relative importance is understood. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims

1. A charge control device, characterized by comprising:

a collision detection module coupled with the main control chip; and the main control chip controls to cut off at least one of the main positive contactor and the main negative contactor to disconnect the conductive connection between the input terminal and the output terminal when the displacement detected by the collision detection module exceeds a first preset threshold value.

2. The charge control device of claim 1, wherein a current limiting module is connected between the positive input pin and the positive output pin, the current limiting module being connected in parallel with the main positive contact; the current limiting module comprises a pre-charging relay and a pre-charging suppression resistor, and the pre-charging relay is in signal connection with the main control chip.

3. The charging control apparatus according to claim 1, wherein the collision detection module includes a first acceleration sensor for detecting an acceleration of the charging control apparatus.

4. The charge control device according to claim 1, wherein the charge control device is configured to be disposed on a vehicle;

5. The charge control device according to claim 1, wherein the main positive contactor, the main negative contactor, and the main control chip are housed in a case;

6. The charge control device according to claim 1, wherein the main positive contactor and the main negative contactor are provided with a sticking detection module for detecting a contact sticking state of the main positive contactor and the main negative contactor; the adhesion detection module is in signal connection with the main control chip.