CN210390845U - Double-source output power battery pack of new energy automobile - Google Patents
Double-source output power battery pack of new energy automobile Download PDFInfo
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- CN210390845U CN210390845U CN201920233710.7U CN201920233710U CN210390845U CN 210390845 U CN210390845 U CN 210390845U CN 201920233710 U CN201920233710 U CN 201920233710U CN 210390845 U CN210390845 U CN 210390845U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model provides a double-source output power battery pack of a new energy automobile, which comprises a power battery module, a starting power module, a bidirectional DC/DC module and a battery management module; the power battery module, the starting power supply module, the bidirectional DC/DC module and the battery management module are arranged in the same power battery pack box; the power battery module is electrically connected to the high-voltage end of the bidirectional DC/DC module; the starting power supply module is electrically connected to the low-voltage end of the bidirectional DC/DC module; the battery management module is used for detecting the stored electric energy of the power battery module and the starting power supply module, and when the stored electric energy of the power battery module is lower than a first preset value and the stored electric energy of the starting power supply is higher than a second preset value, the battery management module controls the bidirectional DC/DC module to enable the starting power supply module to discharge to the power battery module, so that the starting power supply charges the power battery module.
Description
Technical Field
The utility model belongs to the technical field of the new energy automobile, more specifically say, relate to a new energy automobile's two source output power battery package.
Background
In the design and manufacture of the whole new energy automobile, the whole automobile consists of a large number of electric elements such as sensors, a power system (a power battery, a driving motor and a motor controller) and whole automobile accessories (a PTC (positive temperature coefficient), an air conditioner, an oil pump, an air pump, a T-BOX (T-BOX), a VCU (video control unit), a BMS (battery management system), a BCM (binary coded decimal), and the like), and the electric elements all need low-voltage power supplies such as rated 12V, rated 24V, and the like as starting and working power supplies, so the whole automobile needs to be provided. Most lead-acid storage batteries are adopted as starting power supplies in the market. The starting power supply needs the DC/DC module to be integrated in the distribution box or be independently arranged on the whole vehicle, and the high voltage electricity of the power battery is converted into the low voltage electricity through the DC/DC module and is stored in the starting power supply. When the electric energy of the power battery is insufficient, the power battery needs to supplement the electric energy rapidly so as to ensure that the power battery supplies high-voltage power to the whole vehicle.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a new energy automobile's two source output power battery package to when the electric energy of power battery was not enough, power battery need supplement the electric energy fast that exists among the solution prior art, in order to guarantee that power battery carries out the technical problem of high-pressure power supply to whole car.
In order to achieve the above object, the utility model adopts the following technical scheme: the double-source output power battery pack of the new energy automobile comprises a power battery module, a starting power module, a bidirectional DC/DC module and a battery management module;
the power battery module, the starting power supply module, the bidirectional DC/DC module and the battery management module are arranged in the same power battery pack box;
the power battery module is electrically connected to the high-voltage end of the bidirectional DC/DC module;
the starting power supply module is electrically connected to the low-voltage end of the bidirectional DC/DC module;
the starting power module, the power battery module and the bidirectional DC/DC module are respectively in communication connection with the battery management module;
the battery management module is used for detecting the stored electric energy of the power battery module and the starting power supply module, and when the stored electric energy of the power battery module is lower than a first preset value and the stored electric energy of the starting power supply is higher than a second preset value, the battery management module controls the bidirectional DC/DC module to enable the starting power supply module to discharge to the power battery module. Further, the high-voltage contactor is used for controlling the connection or disconnection between the bidirectional DC/DC module and the power battery module.
Further, the high-voltage fuse is used for being connected in series to a high-voltage end of the bidirectional DC/DC module.
Further, the power battery pack further comprises a low-voltage contactor, and the low-voltage contactor is used for controlling the connection or disconnection of the output end of the starting power supply module and an electric appliance.
Further, the power battery pack further comprises a low-voltage fuse, and the low-voltage fuse is connected in series with an output end of the starting power module.
Further, the bidirectional DC/DC module and the power battery module are fixed on a cooling plate.
Furthermore, a first cabin and a second cabin are fixed on the cooling plate, the power battery module is located in the first cabin, and the bidirectional DC/DC module and the starting power supply module are located in the second cabin.
Further, the starting power supply module is fixedly connected with the bidirectional DC/DC module. The utility model provides a pair of new energy automobile's two source output power battery package's beneficial effect lies in: compared with the prior art, the utility model discloses a power battery module is electric automobile's main energy source, generally is high-power group battery. The stored electric energy of the power battery module releases electric energy when the whole vehicle needs. The starting power supply module provides low-voltage power supplies with the rated voltage of 12V, 24V and the like for the electrical element as starting and working power supplies. When the stored electric energy of the starting power module is insufficient, the stored electric energy of the power battery module is charged into the starting power module through the bidirectional DC/DC module; when the electric quantity of the starting power module is sufficient but the electric quantity of the power battery module is insufficient, the battery management module controls the bidirectional DC/DC module to enable the stored electric energy of the starting power module to be supplemented to the power battery module, the electric energy of the power battery module is rapidly supplemented, the power battery module is enabled to carry out normal high-voltage power supply, and the normal operation of the whole vehicle is ensured. The starting power module is equivalent to one part formed by the power battery module, namely the electric quantity of the starting power module is calculated in the electric quantity of the power battery module, and the influence of the energy density of the power battery module is small. The power battery pack box body is high in protection level and has a good heat dissipation system, the power battery pack is provided with the starting power supply module, the starting power supply module uses the heat dissipation system and the protection structure of the power battery pack, and the starting power supply module is not prone to short circuit. The power battery pack enables the new energy automobile to be upgraded and improved. The power battery pack prolongs the service life of the starting power module, improves the reliability of the starting power module and improves the safety of the whole vehicle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic diagram of an internal circuit of a dual-source output power battery pack of a new energy automobile according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first cabin and a second cabin of a power battery pack according to an embodiment of the present invention;
fig. 3 is an integrated schematic diagram of the bidirectional DC/DC module and the starting power module of the power battery pack provided by the embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1. a power battery module; 11. a positive bus; 12. a negative bus; 2. starting a power supply module; 3. a bidirectional DC/DC module; 4. a high voltage contactor; 41. a high voltage fuse; 5. a low voltage contactor; 51. a low-voltage fuse; 6. a cooling plate; 61. a first compartment; 62. a second compartment; 71. a first housing; 72. a second housing; 8. a power battery pack box body; 9. and a battery management module.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the 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.
Referring to fig. 1, a description will now be given of a dual-source output power battery pack of a new energy automobile according to the present invention. A double-source output power battery pack of a new energy automobile comprises a power battery module 1, a starting power module 2, a bidirectional DC/DC module 3 and a battery management module 9;
the power battery module 1, the starting power module 2, the bidirectional DC/DC module 3 and the battery management module 9 are arranged in the same power battery pack box 8;
the power battery module 1 is electrically connected with the high-voltage end of the bidirectional DC/DC module 3;
the starting power supply module 2 is electrically connected to the low-voltage end of the bidirectional DC/DC module 3;
the battery management module 9 is configured to detect stored electric energy of the power battery module 1 and the start power module 2, and when the stored electric energy of the power battery module 1 is lower than a first preset value and the stored electric energy of the start power is higher than a second preset value, the battery management module 9 controls the bidirectional DC/DC module 3 to enable the start power module 2 to discharge to the power battery module 1.
The utility model provides a pair of new energy automobile's two source output power battery package compares with prior art, and power battery module 1 is electric automobile's main energy source, generally is high-power group battery. The stored electric energy of the power battery module 1 releases electric energy when the whole vehicle needs. The starting power supply module 2 provides low-voltage power supplies with the rated 12V, 24V and the like for the electric elements as starting and working power supplies. When the stored electric energy of the starting power module 2 is insufficient, the stored electric energy of the power battery module 1 is charged into the starting power module 2 through the bidirectional DC/DC module 3; when the electric quantity of the starting power module 2 is sufficient but the electric quantity of the power battery module 1 is insufficient, the battery management module 9 controls the bidirectional DC/DC module 3 to make the stored electric energy of the starting power module 2 supplement the power battery module 1, the electric energy of the power battery module 1 is rapidly supplemented, the power battery module 1 is ensured to be capable of carrying out normal high-voltage power supply, and the normal operation of the whole vehicle is ensured. The starting power module 2 is equivalent to a part of the power battery module 1, namely the electric quantity of the starting power module 2 is calculated in the electric quantity of the power battery module 1, and the influence of the energy density of the power battery module 1 is small. The power battery pack box body 8 is high in protection level and has a good heat dissipation system, the power battery pack is provided with the starting power module 2, the starting power module 2 is enabled to use the heat dissipation system and the protection structure of the power battery pack, and the starting power module 2 is not prone to short circuit. The power battery pack enables the new energy automobile to be upgraded and improved. The power battery pack prolongs the service life of the starting power module 2, improves the reliability of the starting power module 2, and improves the safety of the whole vehicle.
Specifically, the power battery module 1 includes a plurality of power battery cells, and the plurality of power battery cells are connected in series.
Specifically, the power battery module 1, the bidirectional DC/DC module 3, the starting power module 2 and the battery management module 9 share one power battery pack box 8. The layout space of the whole vehicle is optimized, the wiring harness layout is optimized, and the manufacturing cost of the whole vehicle is reduced.
Specifically, the bidirectional DC/DC module 3 is connected to the power battery module 1 through a cable, and the bidirectional DC/DC module 3 is connected to the starting power supply module 2 through a cable.
Specifically, the battery management module 9 communicates with the starting power module 2, the power battery module 1, and the bidirectional DC/DC module 3 through the CAN network.
Specifically, the positive end of the power battery module 1 is connected with a positive bus 11, and the negative end of the power battery module 1 is connected with a negative bus 12. The positive bus bar 11 and the negative bus bar 12 are used for connecting electric devices.
Specifically, the transformer of the bidirectional DC/DC module 3 is an isolated transformer or a non-isolated transformer.
Specifically, the starting power module 2 is a lead-acid storage battery.
Further, please refer to fig. 1, as the utility model provides a specific implementation of a new energy automobile's two source output power battery package, battery management module 9 still is used for detecting power battery module 1's output, and when power battery module 1's output was less than the third default, battery management module 9 controlled two-way DC/DC module 3 made starting power supply discharge to power battery module 1.
When the output power of the power battery module 1 is insufficient under an extreme working condition, the battery management module 9 can control the bidirectional DC/DC module 3 to convert the stored electric quantity of the starting power module 2 into high voltage electricity, and the high voltage electricity is output to the power battery module 1, namely, when the output power of the power battery module 1 is insufficient, the power supply module 2 is started to supplement the power, and the power requirement of the whole vehicle can be met.
Further, please refer to fig. 1, as the utility model provides a specific implementation of a new energy automobile's two source output power battery package, still include high voltage contactor 4, high voltage contactor 4 is used for controlling switching on or ending between two-way DC/DC module 3 and the power battery module 1.
Specifically, the high-voltage contactor 4 is connected in series between the positive terminal of the power battery module 1 and the positive terminal of the high-voltage terminal of the bidirectional DC/DC module 3. The high-voltage contactor 4 is controlled by the battery management module 9 and a vehicle control unit VCU (not shown) to be attracted or disconnected, when the high-voltage contactor 4 is attracted, the bidirectional DC/DC module 3 is conducted with the power battery module 1, and when the high-voltage contactor 4 is disconnected, the bidirectional DC/DC module 3 is cut off with the power battery module 1 when the high-voltage contactor 4 is attracted.
Further, please refer to fig. 1, as a specific implementation manner of the dual-source output power battery pack of the new energy automobile provided by the present invention, the present invention further includes a high voltage fuse 41, and the high voltage fuse 41 is used to be connected in series to a high voltage end of the bidirectional DC/DC module 3.
Specifically, the positive terminal of the power battery module 1 is coupled to one end of the high-voltage contactor 4, the other end of the high-voltage contactor 4 is coupled to one end of the high-voltage fuse 41, and the other end of the high-voltage fuse 41 is coupled to the positive terminal of the high-voltage terminal of the bidirectional DC/DC module 3.
Further, please refer to fig. 1, as the utility model provides a specific implementation of a new energy automobile's two source output power battery package, still include low voltage contactor 5, low voltage contactor 5 is used for the control to start power module 2's output and the connection or the disconnection with electrical apparatus.
Specifically, one end of the low-voltage contactor 5 is coupled to the output end of the starting power supply module 2, and the other end of the low-voltage contactor 5 is connected to the power supply input end of the electrical appliance.
Preferably, the low-voltage contactor 5 may be a manual switch. Under the condition of long-time parking, the low-voltage contactor 5 can be turned off manually, the low voltage of the whole vehicle is cut off, and the electric quantity of the starting power module 2 is ensured to be sufficient and the phenomenon of power shortage is avoided.
Further, please refer to fig. 1, as a specific implementation manner of the dual-source output power battery pack of the new energy automobile provided by the utility model, the power battery pack further includes a low-voltage fuse 51, and the low-voltage fuse 51 is connected in series to an output end of the starting power module 2.
The low-voltage fuse 51 functions to protect the circuit.
Specifically, the positive terminal of the starting power supply module 2 is coupled to one end of the low-voltage contactor 5, the other end of the low-voltage contactor 5 is coupled to one end of the low-voltage fuse 51, and the other end of the low-voltage fuse 51 is coupled to the power supply input end of the electrical appliance.
Further, please refer to fig. 2 and fig. 3, as a specific implementation of the present invention, the bidirectional DC/DC module 3 and the power battery module 1 are fixed on the cooling plate 6.
The cooling plate 6 has the heat dissipation effect, the heat dissipation effect of the bidirectional DC/DC module 3 is guaranteed, meanwhile, the bidirectional DC/DC module 3 and the power battery module 1 are integrated, and the space occupied by the power battery pack in the whole vehicle is reduced.
Further, please refer to fig. 2 and fig. 3, as a specific embodiment of the present invention, a first cabin 61 and a second cabin 62 are fixed on the cooling plate 6, the power battery module 1 is located in the first cabin 61, and the bidirectional DC/DC module 3 and the starting power module 2 are located in the second cabin 62.
The power battery module 1 is set as a high-voltage module. The bidirectional DC/DC module 3 and the starting power supply module 2 jointly form a low-voltage module. This power battery package adopts first cabin 61 and second cabin 62, keeps apart high-pressure module and low pressure module, when fully guaranteeing safety, is convenient for high-pressure module and low pressure module maintain alone. The allocation of the first compartment 61 and the second compartment 62 is not limited to positions, and may be arranged according to different design requirements. The wiring harness connected among the bidirectional DC/DC module 3, the starting power supply module 2 and the power battery module 1 is more reasonable in layout.
Further, as the utility model provides a pair of a new energy automobile's a concrete implementation of two source output power battery package starts power module 2 and two-way DC module 3 fixed connection.
The bidirectional DC/DC module 3 and the starting power supply module 2 are connected together, so that the occupied space of the bidirectional DC/DC module 3 and the starting power supply module 2 on the whole vehicle is reduced, and the installation and maintenance of the bidirectional DC/DC module 3 and the starting power supply module 2 are facilitated.
Further, please refer to fig. 1, as the utility model provides a pair of a new energy automobile's a specific implementation of two source output power battery package, battery management module 9 still is used for detecting whether power battery module 1 breaks down, and when power battery module 1 breaks down, battery management module 9 controls two-way DC/DC module 3 and will start power module 2's low pressure and convert high pressure into.
When the power battery module 1 fails to work, the low voltage of the starting power module 2 is converted into high voltage to be output to the whole vehicle, the power maintaining capacity of a new energy vehicle in a short time can be provided in the running process, high voltage power supply is carried out on the oil pump motor, the oil pump motor is enabled to turn to work normally in a short time, and a driver is enabled to control the vehicle in response time.
Specifically, the battery management module 9 includes a voltage detection module and a judgment module. The voltage detection module is used for detecting the total voltage of the battery pack of the power battery module 1 and the voltage of the single battery and sending the total voltage and the voltage of the single battery to the judgment module; the judging module is used for calculating the received voltage value and comparing the calculating structure to judge whether the battery has faults or not; the detection system also comprises a control unit for cutting off a battery pack discharging loop when the battery fails; the judging module comprises a calculating unit and a comparing unit, and the comparing unit is electrically connected with the control unit; the calculating unit is used for calculating the voltage sum of the single batteries and the voltage variation of the single batteries within a certain time T and sending the voltage sum and the voltage variation to the comparing unit; the comparison unit is used for comparing the relation between the total voltage of the battery pack and the sum of the voltages of the single batteries, comparing whether the voltage of the single batteries is equal to 0, comparing whether the total voltage of the battery pack is equal to 0, and comparing whether the voltage change of the single batteries in a certain time T is larger than a set value S.
Preferably, the voltage detection module comprises a Hall sensor for detecting the total voltage of the battery pack and a voltage sensor for detecting the voltage of the single battery, the Hall sensor is electrically connected with the comparison unit, and the voltage sensor is electrically connected with the calculation unit.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A double-source output power battery pack of a new energy automobile is characterized by comprising a power battery module, a starting power module, a bidirectional DC/DC module and a battery management module;
the power battery module, the starting power supply module, the bidirectional DC/DC module and the battery management module are arranged in the same power battery pack box;
the power battery module is electrically connected to the high-voltage end of the bidirectional DC/DC module;
the starting power supply module is electrically connected to the low-voltage end of the bidirectional DC/DC module;
the starting power module, the power battery module and the bidirectional DC/DC module are respectively in communication connection with the battery management module; the battery management module is used for detecting the stored electric energy of the power battery module and the starting power supply module, and when the stored electric energy of the power battery module is lower than a first preset value and the stored electric energy of the starting power supply is higher than a second preset value, the battery management module controls the bidirectional DC/DC module to enable the starting power supply module to discharge to the power battery module.
2. The dual-source output power battery pack of the new energy automobile as claimed in claim 1, further comprising a high voltage contactor for controlling the connection or disconnection between the bidirectional DC/DC module and the power battery module.
3. The dual-source output power battery pack of the new energy automobile as claimed in claim 2, further comprising a high voltage fuse, wherein the high voltage fuse is used for being connected in series with a high voltage end of the bidirectional DC/DC module.
4. The dual-source output power battery pack of the new energy automobile as claimed in claim 1, wherein the power battery pack further comprises a low-voltage contactor, and the low-voltage contactor is used for controlling the connection or disconnection of the output end of the starting power module and an electrical appliance.
5. The dual-source output power battery pack of the new energy automobile as claimed in claim 4, wherein the power battery pack further comprises a low voltage fuse, and the low voltage fuse is connected in series with an output end of the starting power module.
6. The dual-source output power battery pack of the new energy automobile as claimed in claim 1, wherein the bidirectional DC/DC module and the power battery module are fixed on a cooling plate.
7. The dual-source output power battery pack for the new energy automobile as claimed in claim 6, wherein a first cabin and a second cabin are fixed on the cooling plate, the power battery module is located in the first cabin, and the bidirectional DC/DC module and the starting power supply module are located in the second cabin.
8. The dual-source output power battery pack of the new energy automobile as claimed in claim 7, wherein the starting power module is fixedly connected with the bidirectional DC/DC module.
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| CN201920233710.7U CN210390845U (en) | 2019-02-22 | 2019-02-22 | Double-source output power battery pack of new energy automobile |
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| CN201920233710.7U CN210390845U (en) | 2019-02-22 | 2019-02-22 | Double-source output power battery pack of new energy automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109795370A (en) * | 2019-02-22 | 2019-05-24 | 深圳电擎科技有限公司 | A kind of double source output power battery pack of new-energy automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109795370A (en) * | 2019-02-22 | 2019-05-24 | 深圳电擎科技有限公司 | A kind of double source output power battery pack of new-energy automobile |
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Address after: A1002, Plant 2, Longgang Tian'an Digital Innovation Park, No. 449, Huangge North Road, Huanggekeng Community, Longcheng Street, Longgang District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Zhongding Intellectual Property Innovation Development Co.,Ltd. Address before: 518000 4th Floor, Chengtou Business Center, Qinglin West Road, Longgang District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhongding Technology Service Co.,Ltd. |