CN202903991U - Electric quantity displaying and calibrating device for electromobile - Google Patents
Electric quantity displaying and calibrating device for electromobile Download PDFInfo
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- CN202903991U CN202903991U CN 201220135866 CN201220135866U CN202903991U CN 202903991 U CN202903991 U CN 202903991U CN 201220135866 CN201220135866 CN 201220135866 CN 201220135866 U CN201220135866 U CN 201220135866U CN 202903991 U CN202903991 U CN 202903991U
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Abstract
The utility model discloses an electric quantity displaying and calibrating device for electromobile. The device is characterized in that the device is composed of a voltage dividing assembly and two electrical connecting pieces connected in two ends of the voltage dividing assembly; and the voltage dividing assembly is two diode groups connected in parallel, wherein each diode group is formed by series connecting three diodes whose forward voltage drop is from 0.6 to 0.8 volt in the same direction, and the direction of the diodes in one diode group is reverse to that in the other group. The electric quantity displaying and calibrating device for electromobile basically solves the problem that an electric quantity display instrument is not accurate after lithium batteries replace the plumbic acid batteries, and is simple in structure, low in the cost and convenient for installation.
Description
Technical field
The utility model relates to a kind of device that the battery electric quantity of electric motor car is carried out detection display, is specifically related to detect the device of calibrating for the electric weight of the electric motor car of lithium battery being replaced lead-acid battery.
Background technology
Along with the increase of environmental protection pressure, national departments concerned continues to renovate to the lead-acid battery industry.In February, 2012, Chinese Ministry of Environmental Protection reclaims (reviver) industry to lead accumulator again and carries out special environmental protection verification action.Along with the environmental protection threshold improves, numerous plumbic acid not up to standard enterprise may be closed down, and the lead-acid battery price may high enterprise.Meanwhile, the price of lithium battery descends just gradually, can " make rival claims as an equal " with lead-acid battery.Lithium battery substitutes the lead-acid battery process and accelerates.
At present, the electric motor car overwhelming majority of storage adopts lead-acid battery, change in the process of plumbic acid at the lithium electricity, directly to remove to change the lead-acid battery that has now in the electric motor car with the lithium battery group greatly, for reducing electronic waste and reducing replacement cost, the electricity quantity display module in the electric motor car is not changed.Accompanying drawing 1 is 48V/12Ah lithium ion battery group and the 1C discharge curve (SOC curve) of lead-acid battery group under 25 ℃ of environment, as seen from the figure, because lithium battery is higher than the voltage platform of lead-acid battery, therefore can cause the electric weight of car load to show inaccurate after changing lithium battery.Accompanying drawing 2 is electric motor car electric quantity display circuits commonly used at present, provide 4 different comparative voltages by a component volt circuit, 5 component piezoresistances are arranged in the line, when the total voltage of electric battery changes, at magnitude of voltage of every group of resistance terminal output of correspondence, the interior reference voltage of this magnitude of voltage and corresponding with it comparer compares, if when this magnitude of voltage is lower than the reference voltage in the comparer, then corresponding lamp is bright, otherwise does not then work.So logical superpotential height is roughly judged the capacity that electric battery is remaining.Under same state of charge, the output voltage of lithium battery and lead-acid battery is different, thereby, adopt above-mentioned electric quantity display circuit, in existing electric motor car, lead-acid battery changed the lithium battery group by often being that electric weight shows it is full electricity on the car load, and electric weight is few in the actual battery group, and this brings very burden in the time of can using to the user.
For addressing the above problem, a kind of way is the electricity quantity display module that the electricity quantity display module of electric motor car is replaced with the lithium battery special use.Yet this method cost is high, complicated operation when changing, and can produce more electronic waste to the replacing of a large amount of electric motor cars.
Summary of the invention
The electric weight that goal of the invention of the present utility model provides a kind of electric motor car shows calibrating installation, by the calibration of this device realization to the electricity quantity display module in the electric motor car that is replaced by lithium battery from lead-acid battery.
To achieve the above object of the invention, the technical solution adopted in the utility model is: a kind of electric weight of electric motor car shows calibrating installation, consisted of by a dividing potential drop assembly and two electrical connectors that are connected to dividing potential drop assembly two ends, described dividing potential drop assembly is two diode groups that are connected in parallel, each diode group is that 0.6～0.8 volt diode consists of by same direction series connection by three forward voltage drops, and the diode opposite direction of two diode groups in parallel arranges.
Above, adopt two diode group reverse parallel connections, do not need to distinguish both positive and negative polarity during use.When the lead-acid battery electric motor car is carried out battery altering, open car body, electric weight Displaying Meter place in electric motor car, find the both positive and negative polarity wire of access electric weight Displaying Meter, cut off positive wire, two electrical connectors that electric weight in the technique scheme shown calibrating installation are connected respectively to the two ends of cutting off the place, and the calibrating installation series connection is accessed in the electric quantity display circuit.Thus, can carry out the approximately dividing potential drop of 2.1V to the voltage that the input electric weight shows, so that the electric weight that shows on the instrument conforms to the electric weight of electric battery substantially.
In the technique scheme, the summation of the forward voltage drop of three diodes of each described diode group is 2～2.2 volts.
In the technique scheme, described electrical connector is the wire that is connected on the dividing potential drop assembly.
Because technique scheme is used, the utility model compared with prior art has following advantages:
1. the utility model shows calibrating installation by installing electric weight additional, has substantially solved with the inaccurate problem of electric weight Displaying Meter behind the lithium electricity replacement lead-acid battery, and is relieved when the user is used;
2. the utility model adopts two diode group reverse parallel connections, is connected on wire behind the panel board and cuts off the place as long as open during installation, regardless of both positive and negative polarity, is difficult for during replacing makeing mistakes, and it is convenient to realize, does not need the operator is done special training;
3. the utility model only needs 6 diodes to add two section leads and a pcb board can be realized, simple in structure, cost is low.
Description of drawings
Fig. 1 is 48V/12Ah lithium ion battery group and the 1C discharge curve of lead-acid battery group under 25 ℃ of environment.
Fig. 2 is electric quantity display device circuit diagram in the prior art.
Fig. 3 is the circuit diagram of the utility model embodiment.
Fig. 4 is the use-pattern figure of embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: shown in accompanying drawing 3, a kind of electric weight of electric motor car shows calibrating installation, consisted of by a dividing potential drop assembly and two electrical connectors that are connected to dividing potential drop assembly two ends, described dividing potential drop assembly is, the diode that is about 0.7V by three forward voltage drops is together in series by same direction, diode with other three 0.7V is together in series by same direction again, and with before three diodes formations in parallel in the other direction; Respectively connect a section lead as electrical connector at the two ends of parallel connection, the diode assembly two ends can be regardless of both positive and negative polarity like this.
During use, as shown in Figure 4, open the electric weight Displaying Meter place of electric motor car, find the both positive and negative polarity wire of access electric weight Displaying Meter, cut off positive wire, before ready-made electric weight is shown calibrating installation series connection access, then can carry out the dividing potential drop of 2.1V to the voltage of input electric weight demonstration, so that the electric weight that shows on the instrument conforms to the electric weight of electric battery substantially.
Claims (3)
1. the electric weight of an electric motor car shows calibrating installation, it is characterized in that: consisted of by a dividing potential drop assembly and two electrical connectors that are connected to dividing potential drop assembly two ends, described dividing potential drop assembly is two diode groups that are connected in parallel, each diode group is that 0.6～0.8 volt diode consists of by same direction series connection by three forward voltage drops, and the diode opposite direction of two diode groups in parallel arranges.
2. the electric weight of electric motor car according to claim 1 shows calibrating installation, and it is characterized in that: the summation of the forward voltage drop of three diodes of each described diode group is 2～2.2 volts.
3. the electric weight of electric motor car according to claim 1 shows calibrating installation, and it is characterized in that: described electrical connector is the wire that is connected on the dividing potential drop assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220135866 CN202903991U (en) | 2012-04-01 | 2012-04-01 | Electric quantity displaying and calibrating device for electromobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220135866 CN202903991U (en) | 2012-04-01 | 2012-04-01 | Electric quantity displaying and calibrating device for electromobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903991U true CN202903991U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220135866 Expired - Lifetime CN202903991U (en) | 2012-04-01 | 2012-04-01 | Electric quantity displaying and calibrating device for electromobile |
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| CN (1) | CN202903991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831000A (en) * | 2019-01-28 | 2019-05-31 | 湖南科霸汽车动力电池有限责任公司 | Cell voltage conversion output system applied to electric vehicle |
-
2012
- 2012-04-01 CN CN 201220135866 patent/CN202903991U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831000A (en) * | 2019-01-28 | 2019-05-31 | 湖南科霸汽车动力电池有限责任公司 | Cell voltage conversion output system applied to electric vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 215153 Suzhou high tech Zone, Jiangsu city science and technology, Jinsha River Road, No. 181 Patentee after: Phylion battery Limited by Share Ltd Address before: Suzhou City, Jiangsu province 215011 Suzhou District No. 81 Xiangyang Road Patentee before: Suzhou Phylion Battery Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |
|
| CX01 | Expiry of patent term |