CN217788503U - Battery pack for vehicle, battery system and vehicle - Google Patents
Battery pack for vehicle, battery system and vehicle Download PDFInfo
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- CN217788503U CN217788503U CN202221281434.XU CN202221281434U CN217788503U CN 217788503 U CN217788503 U CN 217788503U CN 202221281434 U CN202221281434 U CN 202221281434U CN 217788503 U CN217788503 U CN 217788503U
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Abstract
The embodiment of the application provides a battery package, battery system and vehicle for vehicle, the battery package includes battery unit and BMS unit, battery unit includes a plurality of electric cores, part electric core forms high voltage battery module, the remainder electric core forms the low voltage battery module, the high voltage battery module with the low voltage battery module is connected through first switch. This application in the battery package for the vehicle, because low voltage battery module with high voltage battery module is integrated to form a holistic battery unit together, can be convenient for high voltage battery module with low voltage battery module carries out power transmission through first switch. And because the low voltage battery module and the high voltage battery module are integrated together to form a whole battery unit, the high voltage battery module and the low voltage battery module can share the BMS unit, and the integration level and the structural compactness of the battery pack are improved.
Description
Technical Field
The utility model belongs to the technical field of the power battery structure, specifically, the utility model relates to a battery package, battery system and vehicle for vehicle.
Background
Along with the continuous enhancement of environmental protection consciousness of people, more and more electric automobiles enter the visual field of people. The battery is used as a main power component of the electric automobile and plays a key role in long-term stable operation of the electric automobile.
The batteries on an electric vehicle include a starting battery and a power battery, the starting battery of a conventional vehicle is usually disposed in the front cabin, and the power battery pack is disposed in the chassis position. The scattered arrangement of the starting battery and the power battery not only causes obstacles for electric energy transmission between the starting battery and the power battery, but also reduces the integration level of the vehicle battery part, and is not beneficial to improving the efficiency of the electric energy transmission of the vehicle battery part.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a new technical scheme that is used for battery package, battery system and vehicle of vehicle.
According to a first aspect of the present invention, there is provided a battery pack for a vehicle, comprising:
the battery unit comprises a plurality of battery cores, wherein part of the battery cores form a high-voltage battery module, the rest part of the battery cores form a low-voltage battery module, and the high-voltage battery module and the low-voltage battery module are connected through a first switch;
and a BMS unit connected with the battery cells and monitoring battery information of the high voltage battery module and the low voltage battery module.
Optionally, the first switch is connected to the BMS unit, and the BMS unit turns on the first switch such that the high voltage battery module charges the low voltage battery module when the voltage of the low voltage battery module is less than a threshold voltage.
Optionally, the battery pack further comprises a thermal management unit, wherein the thermal management unit is connected with the battery unit and is used for controlling the temperature of the high-voltage battery module and the low-voltage battery module.
Optionally, the BMS unit includes an information collection assembly for collecting voltage and temperature information of the high voltage battery module and the low voltage battery module.
Optionally, the battery module further comprises a low-voltage switch assembly connected to an output path of the low-voltage battery module.
Optionally, the low-voltage battery module is a 12V battery module.
Optionally, the low-voltage battery module includes at least four electric cores connected in series in sequence.
Optionally, the battery cell is a lithium iron battery cell, and the low-voltage battery module comprises four lithium iron battery cells connected in series in sequence.
According to a second aspect of the present invention, there is provided a battery system including the battery pack of the first aspect.
According to a third aspect of the present invention, there is provided a vehicle including the battery system of the second aspect.
Optionally, the vehicle includes an electronic control assembly, and the electronic control assembly is connected with the high-voltage battery module.
Optionally, the vehicle includes a second switch connected between the low voltage battery module and the electronic control assembly.
The utility model discloses an at least one technological effect lies in:
the embodiment of the present application provides a battery pack for a vehicle, which includes a battery cell and a BMS cell. This application in the battery package for the vehicle, because low voltage battery module with high voltage battery module is integrated to form a holistic battery unit together, can be convenient for high voltage battery module with low voltage battery module carries out power transmission through first switch. And because the low voltage battery module and the high voltage battery module are integrated together to form a whole battery unit, the high voltage battery module and the low voltage battery module can share the BMS unit, and the integration level and the structural compactness of the battery pack are improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a first schematic diagram of a battery pack for a vehicle according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a battery pack for a vehicle according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a battery pack for a vehicle according to an embodiment of the present invention (excluding a BMS unit);
fig. 4 is a second schematic diagram of a battery pack for a vehicle according to an embodiment of the present invention;
fig. 5 is a partial circuit diagram of a vehicle according to an embodiment of the present invention.
Wherein:
100. a battery pack;
1. a high-voltage battery module; 11. a positive relay; 12. a high-voltage resistor; 13. a high voltage fuse; 14. switching a fuse; 15. a negative relay; 16. a high voltage discharge port; 17. a high voltage charging port; 2. a low-voltage battery module; 21. a low-voltage fuse; 3. a first switch; 31. a low pressure output port; 32. a high-voltage output port; 33. a communication port; 4. a BMS unit; 5. a low voltage switching assembly; 6. an electronic control assembly; 7. a second switch; 8. a connector; 9. a low voltage power distribution assembly; 10. and (4) low-voltage load.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 to 5, an embodiment of the present application provides a battery pack 100 for a vehicle, the battery pack 100 including:
the battery unit comprises a plurality of battery cells, wherein part of the battery cells form a high-voltage battery module 1, the rest of the battery cells form a low-voltage battery module 2, for example, the plurality of battery cells form a plurality of battery core groups, one battery core group can form the low-voltage battery module 2, and the rest of the other battery core groups can form the high-voltage battery module 1; or a part of the cells in one cell group may form the low voltage battery module 2, and the other cells of this cell group and the remaining other cell groups may form the high voltage battery module 1, as long as the low voltage battery module 2 and the high voltage battery module 1 can be integrated together, as shown in fig. 1 and 4.
Referring to fig. 1 and 3, the high voltage battery module 1 and the low voltage battery module 2 are connected through a first switch 3, and the first switch 3 may be a voltage control switch, for example, the voltage control switch may be automatically turned on when the voltage of the low voltage battery module 2 is lower than a certain level; alternatively, the first switch 3 may be a converter, such as a DCDC component, through which the electric energy transmission between the high-voltage battery module 1 and the low-voltage battery module 2 is realized. Since the low voltage battery module 2 and the high voltage battery module 1 are integrated together to form a unitary battery unit, it may be convenient for the high voltage battery module 1 and the low voltage battery module 2 to perform power transmission through the first switch 3. The high-voltage battery module 1 can provide energy for driving the vehicle, and meanwhile, power can be provided for the low-voltage battery module 2 through the high-voltage battery module 1 under the condition of high voltage (the vehicle is flamed out, the high-voltage battery module 1 does not provide driving energy for the vehicle) under the vehicle.
Specifically, referring to fig. 3, the high-voltage battery module 1 includes two positive relays 11 connected in parallel, one of the positive relays 11 is used to control the on/off of a charge/discharge main circuit of the high-voltage battery module 1, and the other positive relay 11 is connected in series with the high-voltage resistor 12 and then serves as a part of a pre-charge circuit, when the high-voltage battery module 1 is charged, a cell in the high-voltage battery module 1 is pre-charged from the pre-charge circuit first, so as to avoid damage to the cell when the cell in the high-voltage battery module 1 is directly charged with a large current, one end of each of the two positive relays 11 is connected to the positive terminal of the high-voltage battery module 1, the other end of each of the two positive relays 11 is connected to one end of the high-voltage fuse 13 and one end of the switch fuse 14 connected in parallel, the other end of the high-voltage fuse 13 is connected to the high-voltage discharge port 16 and the high-voltage charge port 17 of the high-voltage battery module 1, specifically, the two high-voltage fuses 13 connected in parallel, one is connected to the high-voltage discharge port 16 of the high-voltage battery module 1, and the other is connected to the high-voltage charge/discharge port 17, and the two high-voltage fuse 13 may avoid an excessive current during the charge/discharge of the high-voltage battery module 1, and form a protection circuit for protecting the high-voltage battery module 1. The other end of the switch fuse 14 is connected to the first switch 3, and the high-voltage battery module 1 and the low-voltage battery module 2 are used for transmitting electric energy through the first switch 3, so that the switch fuse 14 can protect a charging loop between the high-voltage battery module 1 and the low-voltage battery module 2, and the damage of the low-voltage battery module 2 caused by overlarge charging current of the high-voltage battery module 1 to the low-voltage battery module 2 is avoided; and a negative relay 15 and an HVSU (high voltage monitoring unit) chip are connected between the negative electrode end of the high-voltage battery module 1 and the first switch 3, and the negative relay 15 and the HVSU chip can collect information such as temperature, current and voltage of a charge-discharge loop of the high-voltage battery module 1, so as to protect the charge-discharge loop of the high-voltage battery module 1.
The positive terminal of low voltage battery module 2 is connected with low voltage fuse 21, and the setting of low voltage fuse 21 can avoid low voltage battery module 2 too big at the electric current of charge-discharge in-process, forms the protection to the charge-discharge return circuit of low voltage battery module 2. The battery pack 100 is also provided with a connector 8 connected with the whole vehicle, the battery pack 100 is connected with a driving system of the whole vehicle through the connector 8, and the vehicle can keep stable operation under the driving of the driving system.
Referring to fig. 2, the BMS unit 4 is connected to the battery cells and monitors battery information of the high voltage battery module 1 and the low voltage battery module 2. BMS unit 4 (battery management system) can detect high-voltage battery module 1 and low-voltage battery module 2 respectively, specifically is the voltage and the temperature of electric core in detecting high-voltage battery module 1 and low-voltage battery module 2 to report the respective battery data of high-voltage battery module 1 and low-voltage battery module 2 to the VCU unit (vehicle control unit) of whole car end, promptly BMS unit 4 possesses 2 systems of monitoring respectively and controlling high-voltage battery module 1 and low-voltage battery module 2, makes high-voltage battery module 1 and low-voltage battery module 2 share after the integration BMS unit 4, has improved the integrated level and the compact structure of battery package 100.
The battery pack 100 for the vehicle that this application embodiment provided includes battery unit and BMS unit 4, battery unit includes a plurality of electric cores, part electric core forms high voltage battery module 1, the remainder the electric core forms low voltage battery module 2, high voltage battery module 1 with low voltage battery module 2 connects through first switch 3, because low voltage battery module 2 with high voltage battery module 1 is integrated to form a holistic battery unit together, can be convenient for high voltage battery module 1 with low voltage battery module 2 carries out electric energy transmission through first switch 3. And because the low voltage battery module 2 and the high voltage battery module 1 are integrated together to form a whole battery unit, the high voltage battery module 1 and the low voltage battery module 2 can share the BMS unit 4, the integration level and the structural compactness of the battery pack 100 are improved, the service life of the battery pack 100 is prolonged, and the cost of the battery pack 100 is reduced.
Alternatively, referring to fig. 2, the first switch 3 is connected to the BMS unit 4, and the BMS unit 4 turns on the first switch 3 to allow the high voltage battery module 1 to charge the low voltage battery module 2 in the case where the voltage of the low voltage battery module 2 is less than a threshold voltage.
Specifically, when the first switch 3 is connected to the BMS unit 4, the BMS unit 4 may control on/off of the first switch 3. For example, when the voltage of the low-voltage battery module 2 is lower than the threshold voltage, the BMS unit 4 may actively turn on the first switch 3 to intelligently supplement power to the low-voltage battery module 2 using the high-voltage battery module 1.
For example, the threshold voltage may be set to be 30%, 50% or 70% of the full charge voltage of the low voltage battery module 2, in a specific embodiment, the threshold voltage is set to be 30% of the full charge voltage of the low voltage battery module 2, and when the voltage of the low voltage battery module 2 is lower than 30% of the full charge voltage of the low voltage battery module 2, the BMS unit 4 may obtain the voltage value of the low voltage battery module 2 in real time, and may further actively turn on the first switch 3 to intelligently supplement power to the low voltage battery module 2 by using the high voltage battery module 1.
Optionally, the battery pack 100 further includes a thermal management unit, and the thermal management unit is connected to the battery unit and is configured to control the temperature of the high-voltage battery module 1 and the temperature of the low-voltage battery module 2.
Specifically, when the low voltage battery module 2 and the high voltage battery module 1 are integrated together to form a whole battery unit, the thermal management unit can control the temperature of the high voltage battery module 1 and the low voltage battery module 2 in the battery unit respectively, so that the high voltage battery module 1 and the low voltage battery module 2 are shared and work in a proper temperature interval all the time under the condition of the thermal management unit, and the stability of the operation of the high voltage battery module 1 and the low voltage battery module 2 is improved.
Optionally, the BMS unit 4 includes an information collecting assembly for collecting voltage and temperature information of the high voltage battery module 1 and the low voltage battery module 2.
Specifically, high voltage battery module 1 can provide power for the vehicle drive, and low voltage battery module 2 can provide the power for car light and the car machine system etc. of vehicle, makes high voltage battery module 1 with low voltage battery module 2 voltage and temperature in the operation process all can change, and high voltage battery module 1 with low voltage battery module 2 voltage is low or when too high (the electric energy is overdischarged or overcharged), perhaps high voltage battery module 1 with low voltage battery module 2 temperature is low or when too high, all can influence high voltage battery module 1 with low voltage battery module 2's charge-discharge efficiency and life.
This application BMS unit 4's information acquisition subassembly is gathering high voltage battery module 1 with during low voltage battery module 2's voltage and temperature information, can be right high voltage battery module 1 with low voltage battery module 2's voltage and temperature carry out real time monitoring, avoid high voltage battery module 1 with low voltage battery module 2's voltage and temperature appear crossing low or too high risk.
Optionally, referring to fig. 1 and 3, the battery pack 100 further includes a low voltage switch assembly 5, and the low voltage switch assembly 5 is connected to an output path of the low voltage battery module 2.
Specifically, the output path of the low-voltage battery module 2 is generally output to a low-voltage load 10 such as a light through a low-voltage power distribution assembly 9, as shown in fig. 5. When the low-voltage switch assembly 5 is connected to the output path of the low-voltage battery module 2, the low-voltage switch assembly 5 can be used for controlling the on-off of the low-voltage battery module 2 to the loop of the low-voltage load, so that the flexible control of the output of the low-voltage battery module 2 is ensured. Also, when a part of functions of the vehicle are restarted or repaired, in order to ensure the safety of the repair, the output of the low voltage battery module 2 may be cut off by turning off the low voltage switch assembly 5.
In addition, the first switch 3 and the low voltage switch component 5 may be both part of a distribution assembly module (BDU), and the distribution assembly module is electrically connected to the high voltage battery module 1 (for example, connected by a dotted line in fig. 4), and simultaneously the distribution assembly module is electrically connected to the low voltage battery module 2 (for example, connected by a solid line in fig. 4), so that the distribution assembly module can flexibly control the high voltage battery module 1 and the low voltage battery module 2, respectively. Furthermore, the power distribution assembly module may be provided with a low voltage output port 31, a high voltage output port 32 and a communication port 33 to facilitate power and signal transmission between the battery pack 100 and external components, as shown in fig. 4.
Optionally, the low-voltage battery module 2 is a 12V battery module.
Specifically, the low-voltage battery module 2 may be a starting battery of the vehicle, so as to provide sufficient starting current for the vehicle when the vehicle is started; or the low-voltage battery module 2 can also be a low-voltage auxiliary battery of the vehicle, and the low-voltage battery module 2 can provide electric energy for components such as lamplight and a vehicle machine of the vehicle by using the 12V voltage output of the low-voltage battery module, so that the stable operation of the vehicle is ensured.
Optionally, the low-voltage battery module 2 includes at least four electric cores connected in series in sequence.
Specifically, when the low-voltage battery module 2 supplies electric energy to a vehicle, the output voltage of 12V or 24V generally needs to be maintained, and the output voltage of a single battery cell generally is 2-5V, so that the low-voltage battery module 2 with the output voltage of 12V or 24V can be obtained by sequentially connecting four or more battery cells in series, so as to ensure stable power supply of the low-voltage battery module 2.
In a specific embodiment, the battery cell is a lithium iron battery cell, and the low-voltage battery module 2 includes four lithium iron battery cells connected in series in sequence.
The nominal voltage of the monomer lithium iron battery cell commonly used is 3.2V, when needing to form 12V battery module, can form 12V's low voltage battery module 2 after establishing ties four monomer lithium iron battery cells. For example, the battery unit comprises a plurality of battery cells forming a plurality of battery cell groups, and each battery cell group comprises 12 strings of battery cells. Can follow each electric core of 4 of transferring in one of them electric core group and constitute 12V battery module, the remaining 8 electric cores of this electric core group are established ties with other electric core group and are formed high voltage battery module 1 for low voltage battery module 2 and high voltage battery module 1 are integrated back together and a battery structure in the battery package is the same, and it is exactly that low voltage battery module 2 and high voltage battery module 1 can share BMS unit 4, battery thermal management unit etc. promptly, when improving the compactness of battery package 100, avoid carrying out great change to the structure of battery package 100.
The embodiment of the application provides a battery system, and the battery system comprises the battery pack 100.
Specifically, the battery pack 100 is characterized in that the high-voltage battery module 1 and the low-voltage battery module 2 are connected through the first switch 3, the low-voltage battery module 2 and the high-voltage battery module 1 are integrated together to form a whole battery unit, and electric energy transmission between the high-voltage battery module 1 and the low-voltage battery module 2 is performed through the first switch 3. And because the low-voltage battery module 2 and the high-voltage battery module 1 are integrated together to form an integrated battery unit, the high-voltage battery module 1 and the low-voltage battery module 2 can share the BMS unit 4, thereby improving the integration level and the structural compactness of the battery system.
Referring to fig. 5, the embodiment of the present application provides a vehicle including a battery system of the vehicle.
Specifically, including battery pack 100 in the battery system of vehicle, battery pack 100 includes battery unit and BMS unit 4, high voltage battery module 1 with low voltage battery module 2 is connected through first switch 3, because low voltage battery module 2 with high voltage battery module 1 is integrated together and is formed a holistic battery unit, can be convenient for high voltage battery module 1 with low voltage battery module 2 carries out the electric energy transmission through first switch 3. And because the low voltage battery module 2 and the high voltage battery module 1 are integrated together to form a whole battery unit, the high voltage battery module 1 and the low voltage battery module 2 can share the BMS unit 4, the integration level and the structural compactness of the battery pack 100 are improved, the service life of the battery pack 100 is prolonged, and the use stability of the vehicle is ensured.
Alternatively, referring to fig. 5, the vehicle includes an electronic control assembly 6, and the electronic control assembly 6 is connected with the high-voltage battery module 1.
Specifically, automatically controlled subassembly 6 can include motor and electronic control module, automatically controlled subassembly 6 with when high voltage battery module 1 is connected, high voltage battery module 1 can provide the electric energy for the motor, and then converts the electric energy into the operation of drive vehicle behind the mechanical energy through the motor to the realization is to the stable control of vehicle.
Alternatively, referring to fig. 5, the vehicle includes a second switch 7, and the second switch 7 is connected between the low voltage battery module 2 and the electronic control assembly 6.
Specifically, the electronic control component 6 may include a generator, and when the second switch 7 is connected between the low-voltage battery module 2 and the electronic control component 6, the electric energy generated by the generator of the electronic control component 6 may be supplied to the low-voltage battery module 2 for power compensation after being reduced in voltage by the second switch 7, that is, the low-voltage battery module 2 is provided with multiple power compensation modes, so that the battery performance of the low-voltage battery module 2 can be always kept in a good state, and the service life of the low-voltage battery module 2 is prolonged.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. A battery pack for a vehicle, comprising:
the battery unit comprises a plurality of battery cores, wherein part of the battery cores form a high-voltage battery module (1), the rest part of the battery cores form a low-voltage battery module (2), and the high-voltage battery module (1) is connected with the low-voltage battery module (2) through a first switch (3);
a BMS unit (4), the BMS unit (4) being connected with the battery cells and monitoring battery information of the high-voltage battery module (1) and the low-voltage battery module (2).
2. The battery pack for a vehicle according to claim 1, wherein the first switch (3) is connected to the BMS unit (4), and the BMS unit (4) turns on the first switch (3) to allow the high voltage battery module (1) to charge the low voltage battery module (2) in the case where the voltage of the low voltage battery module (2) is less than a threshold voltage.
3. The battery pack for a vehicle according to claim 1 or 2, further comprising a thermal management unit connected to the battery unit and configured to perform temperature control of the high-voltage battery module (1) and the low-voltage battery module (2).
4. The battery pack for the vehicle according to claim 1 or 2, wherein the BMS unit (4) includes an information collection module for collecting voltage and temperature information of the high voltage battery module (1) and the low voltage battery module (2).
5. The battery pack for a vehicle according to claim 1 or 2, further comprising a low voltage switch assembly (5), the low voltage switch assembly (5) being connected to an output path of the low voltage battery module (2).
6. The battery pack for a vehicle according to claim 1 or 2, wherein the low-voltage battery module (2) is a 12V battery module.
7. The battery pack of a vehicle according to claim 1 or 2, characterized in that the low-voltage battery module (2) comprises at least four cells connected in series in sequence.
8. The vehicle battery pack of claim 7, wherein the cells are lithium iron cells, and the low-voltage battery module (2) comprises four lithium iron cells connected in series in sequence.
9. A battery system comprising the battery pack according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the battery system of claim 9.
11. The vehicle according to claim 10, characterized in that the vehicle comprises an electronic control assembly (6), and the electronic control assembly (6) is connected with the high-voltage battery module (1).
12. Vehicle according to claim 11, characterized in that it comprises a second switch (7), said second switch (7) being connected between said low-voltage battery module (2) and said electronic control assembly (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281434.XU CN217788503U (en) | 2022-05-24 | 2022-05-24 | Battery pack for vehicle, battery system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281434.XU CN217788503U (en) | 2022-05-24 | 2022-05-24 | Battery pack for vehicle, battery system and vehicle |
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| Publication Number | Publication Date |
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| CN217788503U true CN217788503U (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221281434.XU Active CN217788503U (en) | 2022-05-24 | 2022-05-24 | Battery pack for vehicle, battery system and vehicle |
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| CN (1) | CN217788503U (en) |
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2022
- 2022-05-24 CN CN202221281434.XU patent/CN217788503U/en active Active
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