CN212258506U - Potential equalizing device - Google Patents
Potential equalizing device Download PDFInfo
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- CN212258506U CN212258506U CN202021621182.1U CN202021621182U CN212258506U CN 212258506 U CN212258506 U CN 212258506U CN 202021621182 U CN202021621182 U CN 202021621182U CN 212258506 U CN212258506 U CN 212258506U
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- detection module
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Abstract
The utility model discloses a potential equalizing device, wherein, this potential equalizing device includes: the high-voltage distribution module receives an operation instruction and controls the second contactor to be closed to form a secondary loop, and when the current detected by the current detection module is smaller than a preset first threshold value, the first contactor is controlled to be closed and the second contactor is controlled to be disconnected to form the main loop so as to finish potential equalization; therefore, the positive wire harness connected between the two batteries to be equalized of the potential equalizing device becomes an equipotential point, so that the phenomenon of sparking when the two batteries to be equalized are installed in series is avoided, and the use cost is greatly reduced.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to electric potential equalizing device.
Background
In the related art, the battery capacity becomes a large evaluation index of a new energy vehicle, in order to improve the battery capacity of the new energy vehicle, a series-parallel connection mode is generally adopted to increase the number of battery packs, however, due to inconsistent electric quantity among single battery packs, a voltage difference is inevitably generated when the battery packs are connected in parallel to form a battery pack, and the voltage difference can cause sparking of connecting terminals led out when the battery packs are connected in series, so that the terminals are damaged, and a certain potential safety hazard exists.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the above-mentioned technology to a certain extent. Therefore, an object of the utility model is to provide a potential equalizing device for two that connect this potential equalizing device treat that the anodal pencil between the equalizing cell becomes the equipotential point, thereby appear the phenomenon of sparking when avoiding installing, and then greatly reduced use cost.
In order to achieve the above object, an embodiment of the present invention provides a potential equalizing device, which includes: current detection module, high-voltage distribution module and with the potential balance loop that high-voltage distribution module connects, potential balance loop includes first end, first contactor, second contactor, power resistor and second end, first end through first contactor with the second end constitutes the major loop, first end through series connection the second contactor with power resistor with the second end constitutes secondary circuit, high-voltage distribution module controls when receiving the operating instruction the second contactor is closed, forms the secondary circuit in order to carry out the potential balance, and control when the input current that current detection module detected is less than predetermined first threshold first contactor is closed and the second contactor disconnection, forms the major loop in order to accomplish the potential balance.
According to the utility model provides a potential balancing device, control the second contactor to close when high voltage distribution module receives the operation instruction, form the secondary circuit in order to carry out the potential balancing, and control the first contactor to close and the disconnection of second contactor when the input current that current detection module detected is less than the first threshold value of presetting, form the main loop in order to accomplish the potential balancing; therefore, the positive wire harness connected between the two batteries to be equalized of the potential equalizing device becomes an equipotential point, so that the phenomenon of sparking when the two batteries to be equalized are installed in series is avoided, and the use cost is greatly reduced.
In addition, according to the present invention, the above-mentioned potential equalizing device can also have the following additional technical features:
optionally, the potential equalizing device further includes a first positive electrode lead and a second positive electrode lead, the first end is connected to a first battery positive electrode wire harness to be equalized through the first positive electrode lead, and the second end is connected to a second battery positive electrode wire harness to be equalized through the second positive electrode lead.
Optionally, the potential equalizing device further includes a first voltage detection module and a second voltage detection module, the first voltage detection module is connected to a first end of the potential equalizing loop, the second voltage detection module is connected to a second end of the potential equalizing loop, and the high-voltage power distribution module determines that the positive electrode harness of the first battery to be equalized and the positive electrode harness of the second battery to be equalized are both normally connected when the voltage values detected by the first voltage detection module and the second voltage detection module are both smaller than a preset second threshold value, so as to perform potential equalizing operation.
Optionally, the high voltage distribution module controls the first contactor and the second contactor to be opened when receiving a stop command.
Optionally, the high-voltage power distribution module determines an equalization fault when the input current detected by the current detection module is greater than a third threshold or the voltage value detected by the first voltage detection module or the second voltage detection module is greater than a preset fourth threshold.
Optionally, the preset third threshold is greater than the preset first threshold, and the preset fourth threshold is greater than the preset second threshold.
Drawings
Fig. 1 is a schematic block diagram of a potential equalizing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a high-voltage principle of a potential equalizing device according to an embodiment of the present invention;
fig. 3 is an external view of a potential equalizing device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 1, an embodiment of the present invention provides a potential equalization apparatus, including a current detection module 10, a high voltage distribution module 20, and a potential equalization loop 30 connected to the high voltage distribution module 20.
As shown in fig. 2, the potential equalizing circuit 30 includes a first end, a first contactor K1, a second contactor K2, a power resistor R1, and a second end, where the first end forms a main circuit with the second end through the first contactor K1, and the first end forms a secondary circuit with the second end through a second contactor K2 and a power resistor R1 connected in series.
That is, the potential equalization circuit 30 includes two circuits of a main circuit and a secondary circuit, and the main circuit and the secondary circuit are connected in parallel, and when the first contactor K1 is closed, the current between the two battery packs to be equalized forms the main circuit through the first contactor K1, and when the second contactor K2 is closed, the current between the two battery packs to be equalized forms the secondary circuit through the second contactor K2 and the power resistor R1.
When receiving the operation command, the high-voltage power distribution module 20 controls the second contactor K2 to be closed to form a secondary circuit for potential equalization, and controls the first contactor K1 to be closed and the second contactor K2 to be opened when the input current detected by the current detection module 10 is smaller than the preset first threshold value, so as to form a main circuit for potential equalization.
The first contactor K1 and the second contactor K2 are normally open contactors.
That is to say, after two battery packs to be equalized are connected to the potential equalization loop 30 and the high voltage power distribution module 20 receives an operation instruction from a user, the high voltage power distribution module 20 immediately controls the second contactor K2 to be closed, so that the secondary loop is conducted, at this time, current flows from a high place to a low place, so that potential equalization is performed on the two battery packs to be equalized, until the input current detected by the current detection module 10 is smaller than a preset first threshold value, the high voltage power distribution module 20 judges that the voltage difference between the two battery packs to be equalized is smaller, so as to control the first contactor K1 to be closed and the second contactor K2 to be opened, and a main loop is formed to complete potential equalization.
It should be noted that the current detection module 10 monitors the magnitude of the input current in real time, and sends the acquired current value to the high-voltage distribution module 20.
As an embodiment, the preset first threshold is predefined by the user, and the value is set according to actual needs, which is not specifically limited by the present invention.
As a specific embodiment, the current detection module 10 is disposed at the copper bar of the main loop.
As a specific example, as shown in fig. 3, the user presses the operation button to signal the operation command to the high voltage distribution module 20, and at this time, the operation indicator lamp is turned on.
As a specific embodiment, the potential equalization device further includes a first positive electrode lead and a second positive electrode lead, the first end is connected to a first battery positive electrode wire harness to be equalized through the first positive electrode lead, and the second end is connected to a second battery positive electrode wire harness to be equalized through the second positive electrode lead.
As an example, as shown in fig. 3, the first positive electrode lead is a battery positive electrode lead 1, the second positive electrode lead is a battery positive electrode lead 2, and the battery positive electrode lead 1 and the battery positive electrode lead 2 are used for connecting the potential equalizing device with the positive electrode wire bundles corresponding to the two groups of battery packs to be equalized.
It should be noted that the potential equalization device further includes a battery negative electrode lead for connecting with a common negative electrode wire harness of the two groups of battery packs to be equalized.
As a specific embodiment, the potential equalization apparatus further includes a first voltage detection module and a second voltage detection module, the first voltage detection module is connected to a first end of the potential equalization loop, the second voltage detection module is connected to a second end of the potential equalization loop, and the high-voltage power distribution module 20 determines that both the positive electrode harness of the first battery to be equalized and the positive electrode harness of the second battery to be equalized are connected normally when both the voltage values detected by the first voltage detection module and the second voltage detection module are smaller than a preset second threshold value, so as to perform the potential equalization operation.
That is to say, when the potential equalization is performed, the first voltage detection module and the second voltage detection module detect corresponding voltage values, and if both the voltage values are smaller than the second threshold value, it indicates that the two battery packs to be equalized are normally connected with the potential equalization device.
As an embodiment, as shown in fig. 3, when the voltage values detected by the first voltage detection module and the second voltage detection module are both smaller than the preset second threshold, the high voltage distribution module 20 controls the standby indicator to light up, which indicates that the two battery packs to be equalized are normally connected to the potential equalization apparatus, and the operation can be performed.
As an embodiment, the first voltage detection module is arranged at the positive terminal of the first battery pack, the second voltage detection module is arranged at the positive terminal of the second battery pack, and the voltage values of the two battery packs connected into the potential equalizing device are respectively measured.
As an embodiment, the preset second threshold is predefined by the user, and the value is set according to actual needs, and specifically may be 400V, which is not specifically limited by the present invention.
As an embodiment, the high voltage distribution module 20 controls the first contactor K1 and the second contactor K2 to open when receiving the stop command.
As shown in fig. 3, the user presses the stop button to send a signal of a stop instruction to the high voltage distribution module 20, at which time the stop indicator lamp is turned on.
As an embodiment, an emergency stop button is further included, and the emergency stop button is used for controlling the high-voltage power distribution module 20 to emergently cut off the potential equalization loop 30.
As an embodiment, the high voltage distribution module 20 determines the equalization fault when the input current detected by the current detection module 10 is greater than a third threshold or the voltage value detected by the first voltage detection module or the second voltage detection module is greater than a preset fourth threshold.
That is, when the input current detected by the current detection module 10 is greater than the third threshold, the high-voltage distribution module 20 determines a balance fault according to the input current detected by the current detection module 10, and at this time, the fault indicator lights up; when the voltage value detected by the first voltage detection module or the second voltage detection module is greater than the preset fourth threshold, the press-fit module 20 determines a balance fault according to the voltage value detected by the first voltage detection module or the second voltage detection module, and at this time, the fault indicator light is turned on.
As an embodiment, the preset third threshold is greater than the preset first threshold, and the preset fourth threshold is greater than the preset second threshold.
It should be noted that, the installation order of the new energy vehicle is: the battery pack is assembled firstly, the five-in-one controller is assembled and driven secondly, and when the wiring harness of the five-in-one controller is driven secondarily in the installation process, the wiring harness led out from the battery pack is electrified, the potential equalizing device is needed to be used at the moment, and after the wiring harness is installed, the potential equalizing device can be detached, so that the sparking phenomenon occurring in the installation process is avoided through the potential equalizing device, the connector does not need to be used, the common OT terminal is used, and the use cost is greatly reduced.
In summary, according to the utility model, when the high voltage distribution module receives the operation command, the second contactor is controlled to be closed to form a secondary circuit for potential equalization, and when the input current detected by the current detection module is smaller than the preset first threshold value, the first contactor is controlled to be closed and the second contactor is controlled to be disconnected to form a main circuit for potential equalization; therefore, the positive wire harness connected between the two batteries to be equalized of the potential equalizing device becomes an equipotential point, so that the phenomenon of sparking when the two batteries to be equalized are installed in series is avoided, and the use cost is greatly reduced.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (6)
1. A potential equalization device is characterized by comprising a current detection module, a high-voltage power distribution module and a potential equalization loop connected with the high-voltage power distribution module, the potential equalization loop comprises a first end, a first contactor, a second contactor, a power resistor and a second end, the first end and the second end form a main loop through a first contactor, the first end and the second end form a secondary loop through the second contactor and the power resistor which are connected in series, the high-voltage distribution module controls the second contactor to be closed when receiving an operation instruction to form a secondary circuit for potential equalization, and when the input current detected by the current detection module is smaller than a preset first threshold value, the first contactor is controlled to be closed and the second contactor is controlled to be opened, so that a main loop is formed to finish potential equalization.
2. The apparatus for potential equalization according to claim 1, further comprising a first positive electrode lead through which said first end is connected to a first positive electrode bundle of batteries to be equalized and a second positive electrode lead through which said second end is connected to a second positive electrode bundle of batteries to be equalized.
3. The device for potential equalization according to claim 2, further comprising a first voltage detection module and a second voltage detection module, wherein the first voltage detection module is connected to a first end of the potential equalization loop, the second voltage detection module is connected to a second end of the potential equalization loop, and the high-voltage distribution module judges that the first battery positive electrode wire harness to be equalized and the second battery positive electrode wire harness to be equalized are both normally connected when the voltage values detected by the first voltage detection module and the second voltage detection module are both smaller than a preset second threshold value, so as to perform a potential equalization operation.
4. The apparatus for potential equalization of claim 1, wherein said high voltage power distribution module controls said first contactor and said second contactor to open upon receiving a stop command.
5. The apparatus for potential equalization of claim 3 wherein the high voltage power distribution module determines an equalization fault when the input current detected by the current detection module is greater than a third threshold or the voltage detected by the first voltage detection module or the second voltage detection module is greater than a preset fourth threshold.
6. Potential equalizing device according to claim 5, wherein said predetermined third threshold value is greater than said predetermined first threshold value and said predetermined fourth threshold value is greater than said predetermined second threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021621182.1U CN212258506U (en) | 2020-08-06 | 2020-08-06 | Potential equalizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021621182.1U CN212258506U (en) | 2020-08-06 | 2020-08-06 | Potential equalizing device |
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| CN212258506U true CN212258506U (en) | 2020-12-29 |
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| CN202021621182.1U Active CN212258506U (en) | 2020-08-06 | 2020-08-06 | Potential equalizing device |
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