CN215452535U - Battery system - Google Patents
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- CN215452535U CN215452535U CN202121219049.8U CN202121219049U CN215452535U CN 215452535 U CN215452535 U CN 215452535U CN 202121219049 U CN202121219049 U CN 202121219049U CN 215452535 U CN215452535 U CN 215452535U
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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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The application discloses battery system is applied to the car. The battery system includes: the power supply module is electrically connected with a first system of the automobile and a second system of the automobile respectively and is used for providing a first electric signal for the first system; or the power supply module is used for providing the first electrical signal for the first system and providing the second electrical signal for the second system; the conversion module is electrically connected with the power supply module, the first system and the second system respectively and is used for converting the first electric signal into a third electric signal; the third electrical signal is used for supplying power to the power supply module or supplying power to the second system. According to the embodiment of the application, the number of the power supply modules in the automobile is reduced by integrating the power supply modules, so that the occupation of the whole automobile space is reduced.
Description
Technical Field
The application relates to the technical field of power supply, in particular to a battery system.
Background
Currently, in electric vehicle systems, for example: the hybrid electric automobile system with the weak mixing/start-stop system comprises two power supply modules which are respectively used for supplying power to a power system and a whole automobile power supply module.
In the related art, two power supply modules need to occupy more space of the whole vehicle, and a large amount of electric connecting wires need to be consumed, so that the cost and the volume of the whole vehicle are influenced.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving at least one of the problems in the prior art. Therefore, the battery system can reduce occupied space of the whole vehicle, and accordingly cost of the whole vehicle is reduced.
The battery system according to the embodiment of the first aspect of the present application is applied to an automobile including a first system and a second system, and includes: the power supply module is electrically connected with the first system and the second system respectively and is used for providing a first electric signal for the first system; or the power supply module is used for providing the first electrical signal for the first system and providing the second electrical signal for the second system; the conversion module is electrically connected with the power supply module, the first system and the second system respectively and is used for converting the first electric signal into a third electric signal; the third electrical signal is used for supplying power to the power supply module or supplying power to the second system.
According to the battery system of the embodiment of the application, at least the following beneficial effects are achieved: through integrating power module 300 for power module can provide first signal of telecommunication for first system, can provide the second signal of telecommunication again for the second system, thereby has reduced the whole car space that battery system shared, has reduced battery system's cost and whole car volume to a certain extent. The first electric signal is converted into the third electric signal through the conversion module, so that when the power supply module breaks down, the second system can continue to operate by using the third signal, and the power supply stability and reliability of the battery system are improved.
According to some embodiments of the present application, the power supply module comprises: one end of the first power supply unit is electrically connected with the conversion module and the first system respectively, and the first power supply unit is used for providing an initial electric signal; the second power supply unit is electrically connected with the other end of the first power supply unit, the conversion module and the second system respectively, and is used for providing the second electric signal; wherein, U1＝U0+U2，U1Representing said first electrical signal, U0Representing said initial electrical signal, U2Representing the second electrical signal.
According to some embodiments of the application, further comprising: the battery management module is electrically connected with the power supply module and the conversion module respectively, and is used for collecting a first current, a second current and a third current and generating a control signal according to at least one of the first current, the second current and the third current; wherein the first current represents a current of the power supply module, the second current represents a current of the second power supply unit, and the third current represents a current of the conversion module; and the conversion module controls the size or the transmission state of the third electric signal according to the control signal.
According to some embodiments of the present application, the battery management module comprises: one end of the first acquisition unit is electrically connected with the other end of the second power supply unit, the other end of the first acquisition unit is electrically connected with the first system, and the first acquisition unit is used for acquiring the first current; one end of the second acquisition unit is electrically connected with one end of the second power supply unit, the other end of the second acquisition unit is electrically connected with the second system, and the second acquisition unit is used for acquiring the second current; the battery management unit is respectively electrically connected with the first power supply unit, the second power supply unit, the conversion module, the first acquisition unit and the second acquisition unit, and is used for acquiring the third current and generating the control signal according to at least one of the first current, the second current and the third current.
According to some embodiments of the application, the conversion module comprises: the first switch is electrically connected with one end of the second power supply unit, the battery management unit and the second system respectively; the voltage conversion unit is electrically connected with the first switch, one end of the first power supply unit, the other end of the second power supply unit and the battery management unit respectively, and is used for converting the first electric signal into a third electric signal, wherein the first switch is used for controlling the transmission state of the third electric signal according to the control signal, and the voltage conversion unit is also used for controlling the size of the third electric signal according to the control signal.
According to some embodiments of the present application, the battery management unit comprises: and the second switch is electrically connected with the second power supply unit and is used for controlling the conduction state of the second power supply unit according to the control signal.
According to some embodiments of the present application, the battery management unit further comprises: and one end of the fuse is electrically connected with the second switch, and the other end of the fuse is electrically connected with the other end of the second power supply unit.
According to some embodiments of the application, further comprising: one end of the circuit breaking module is electrically connected with one end of the first power supply unit, and the other end of the circuit breaking module is electrically connected with the first system; the circuit breaking module is also electrically connected with the battery management unit and is used for controlling the connection state of the first power supply unit and the first system according to the control signal.
According to some embodiments of the present application, the circuit interrupting module comprises: the third switch is respectively electrically connected with the first power supply unit, the battery management unit and the first system, and is used for controlling the connection state of the first power supply unit and the first system according to the control signal; a fourth switch electrically connected to the first power supply unit, the first system, and the battery management unit, respectively, the fourth switch being configured to control a precharge operation of the first system according to the control signal.
According to some embodiments of the present application, the first power supply unit comprises at least one ternary battery, and the second power supply unit comprises at least one lithium iron phosphate battery.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The present application is further described with reference to the following figures and examples, in which:
FIG. 1 is a block diagram of a related art embodiment of the present application;
FIG. 2 is a block diagram of a battery system according to an embodiment of the present disclosure;
FIG. 3 is another block diagram of a battery system according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of a battery system according to an embodiment of the present disclosure.
Reference numerals:
the system comprises a first system 100, a second system 200, a power supply module 300, a first power supply unit 310, a second power supply unit 320, a conversion module 400, a battery management module 500 and a circuit breaking module 600.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar 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 only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means 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 present application. In this specification, the schematic representations of the terms used above do not 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.
In the following embodiments, a first system is taken as a power system, and a second system is taken as a vehicle power supply module. The power system is used for supplying power to automobile power devices such as BSG (Bell-drive Starter Generator), and the whole automobile power supply module is used for supplying power to a whole automobile control device such as BCM (body controller). It will be appreciated that the automotive systems represented by the first and second systems may also be adapted to the actual conditions.
Referring to fig. 1, in the related art, a battery system includes two power supply modules, namely a 48V battery system and a 12V battery system, which respectively provide electric signals for a power system and a vehicle power supply module. The DCDC converter converts 48V voltage provided by the 48V battery system into 12V voltage so as to continuously charge the 12V battery system, and the 12V battery system can provide electric signals for a whole vehicle power supply module. In the method, the 48V battery system and the 12V battery system occupy larger space of the whole vehicle, and when the 12V battery system breaks down, the power supply module of the whole vehicle stops working, thereby influencing the operation of the vehicle. Based on this, this application embodiment provides a battery system, through with 48V battery system and 12V battery system integration, has reduced the space that battery system occupied for whole car power module also can normally operate when 12V battery system breaks down.
Referring to fig. 2, an embodiment of the present application provides a battery system applied to an automobile including a first system 100 and a second system 200. The battery system includes: a power supply module 300 and a conversion module 400. The power supply module 300 is electrically connected to the first system 100 and the second system 200, respectively, and the power supply module 300 is configured to provide a first electrical signal to the first system 100; or to provide a first electrical signal to the first system 100 and a second electrical signal to the second system 200. The conversion module 400 is electrically connected to the power supply module 300, the first system 100 and the second system 200, respectively, and the conversion module 400 is configured to convert the first electrical signal into a third electrical signal. The third electrical signal is used to supply power to the power supply module 300 or the second system 200. Specifically, the first electrical signal represents the entire electrical signal provided by the power supply module 300, and the second electrical signal represents a partial electrical signal provided by the power supply module 300. The conversion module 400, the first system 100 and the second system 200 are respectively connected in parallel with the power supply module 300, an input end of the conversion module 400 is electrically connected with one end of the power supply module, and an output end of the conversion module 400 is electrically connected with the second system 200. When the vehicle is in the normal mode, the power supply module 300 provides the first electrical signal to the first system 100 and simultaneously provides the second electrical signal to the second system 200. At this time, the conversion module 400 is used for performing a power supplement operation on the power supply module 300 to ensure that the batteries of the power supply module 300 are balanced. When the power supply module 300 has an abnormal fault, for example: when the second electrical signal cannot be provided, the first electrical signal does not satisfy the supply voltage of the first system 100, and the first system 100 suspends its operation. At this time, the conversion module converts the first electrical signal into a third electrical signal, and supplies power to the second system 200 using the third electrical signal, thereby ensuring normal operation of the second system 200.
The battery system that this application embodiment provided is through integrating power module 300 for power module 300 can provide first signal of telecommunication for first system 100, can provide the second signal of telecommunication for second system 200 again, thereby has reduced the whole car space that battery system occupied, has reduced battery system's cost and whole car volume to a certain extent. The first electrical signal is converted into the third electrical signal by the conversion module 400, so that when the power supply module 300 fails, the second system 200 can continue to operate by using the third electrical signal, thereby improving the power supply stability and reliability of the battery system.
Referring to fig. 3, in some embodiments, the power module 300 includes: a first power supply unit 310 and a second power supply unit 320. One end of the first power supply unit 310 is electrically connected to the conversion module 400 and the first system 100, respectively, and the first power supply unit 310 is configured to provide an initial electrical signal. The second power supply unit 320 is respectively connected with the first power supply unitThe other end of 310, the conversion module 400 and the second system 200 are electrically connected, and the second power supply unit 320 is used for providing a second electrical signal. Wherein, U1＝U0+U2，U1Representing a first electrical signal, U0Representing the initial electrical signal, U2Representing the second electrical signal. Specifically, the power supply module 300 is formed by serially integrating a first power supply unit 310 and a second power supply unit 320, the second power supply unit 320 is used for providing a second electrical signal for the second system 200, and a first electrical signal generated after the first power supply unit 310 and the second power supply unit 320 are serially connected is used for providing power for the first system 100. For example, the first system 100 requires a 48V power signal and the second system 200 requires a 12V power signal. The first power supply unit 310 provides an initial electrical signal of 36V, the second power supply unit 320 provides a second electrical signal of 12V, and the power supply module 300 generates a first electrical signal of 48V by connecting the first power supply unit 310 and the second power supply unit 320 in series. Thus, when the power supply module 300 operates normally, the first electrical signal and the second electrical signal can be generated at the same time to supply power to the first system 100 and the second system 200, respectively. When the power supply module 300 fails to provide the second electrical signal, the conversion module 400 converts the first electrical signal into a 12V third electrical signal and sends the third electrical signal to the second system 200, so as to ensure the normal operation of the second system 200.
In addition, since the second power supply unit 320 needs to be integrated with the first power supply unit 310 to generate a first electrical signal of 48V and needs to provide a second electrical signal of 12V for the second system 200, when the power supply module 300 works normally, the conversion module 400 converts the electrical signal of 48V or 36V and sends the converted electrical signal to the second system 200, so as to implement a power supplement operation on the second power supply unit 320, thereby ensuring the balance of the battery.
In some embodiments, the battery system further comprises: the battery management module 500. The battery management module 500 is electrically connected to the power supply module 300 and the conversion module 400, respectively, and the battery management module 500 is configured to collect a first current, a second current, and a third current, and generate a control signal according to at least one of the first current, the second current, and the third current. Wherein the first current represents a current of the power supply module 300, the second current represents a current of the second power supply unit 320, and the third current represents a current of the conversion module 400. The conversion module 400 controls the magnitude or the transmission state of the third electrical signal according to the control signal. Specifically, the battery management module 500 collects a first current of the power supply module 300, a second current of the first power supply unit 310, and an output current of the conversion module 400, and determines the operating state or the power supply condition of the power supply module 300 according to at least one of the currents. For example, it is determined whether the second power supply unit 320 has failed; or calculating the magnitude of the current and the power supplementing time of the conversion module 400 for supplementing the second power supply unit 320 according to the ampere-hour integration method, and generating a corresponding control signal. When the second power supply unit 320 fails, the conversion module 400 converts the first electrical signal into a third electrical signal according to the control signal, and sends the third electrical signal to the second system 200, so as to ensure the normal operation of the second system 200. When the power supply module 300 is in a normal working state, the conversion module 400 generates a corresponding power supply current according to the control signal, so as to achieve the balance of the battery.
Referring to fig. 4, in some embodiments, the battery management module 500 includes: a first acquisition unit 510, a second acquisition unit 520, and a battery management unit. One end of the first collecting unit 510 is electrically connected to the other end of the second power supply unit 320, the other end of the first collecting unit 510 is electrically connected to the first system 100, and the first collecting unit 510 is configured to collect a first current. One end of the second collecting unit 520 is electrically connected to one end of the second power supply unit 320, the other end of the second collecting unit 520 is electrically connected to the second system 200, and the second collecting unit 520 is configured to collect a second current. The battery management unit is electrically connected to the first power supply unit 310, the second power supply unit 320, the conversion module 400, the first collection unit 510, and the second collection unit 520, and the battery management unit is configured to collect a third current and generate a control signal according to at least one of the first current, the second current, and the third current. Specifically, the first collecting unit 510 is connected in series to the power supply loop of the power supply module 300 to the first system 100, and the second collecting unit 520 is connected in series to the power supply loop of the second power supply unit 320 to the second system 200. The first collecting unit 510 comprises a shunt R1, the second collecting unit 520 comprises a shunt R2, the collected current is sent to the battery management unit by the first collecting unit 510 and the second collecting unit 520, the battery management unit is in SPI communication with the conversion module 400, and the battery management unit collects the third current of the conversion module 400. The battery management unit generates a control signal according to at least one of the first current, the second current and the third current, so that the conversion module 400 generates a corresponding third electrical signal according to the control signal or performs a power supplementing operation on the second power supply unit 320.
In some embodiments, the conversion module 400 includes: a first switch K1 and a voltage conversion unit. The first switch K1 is electrically connected to one end of the second power supply unit 320, the battery management unit, and the second system 200, respectively. The voltage conversion unit is electrically connected to the first switch K1, one end of the first power supply unit 310, the other end of the second power supply unit 320, and the battery management unit, respectively, and is configured to convert the first electrical signal into a third electrical signal. The first switch K1 is configured to control a transmission state of the third electrical signal according to the control signal, and the voltage conversion unit is further configured to control a magnitude of the third electrical signal according to the control signal. In particular, the voltage converting unit comprises a DCDC converter with a power of 3 KW. The first switch K1 is a controllable switch such as a bistable relay, the controllable end of the first switch K1 is electrically connected to the battery management unit, and the first switch K1 is disposed on the power supply loop of the second power supply unit 320 to the second system 200. In the normal operation mode, the first switch K1 is in a normally closed state, and the voltage conversion unit adjusts the current magnitude during the power supplement operation on the second power supply module 300 according to the control signal. When the second power supply unit 320 malfunctions abnormally, for example: when any fault such as overvoltage, undervoltage, open circuit, short circuit and the like occurs in the second power supply unit 320, the battery management unit controls the first switch K1 to be switched off. At this time, the power supply of the second system 200 is derived from the third electrical signal output by the voltage conversion unit, thereby ensuring the normal operation of the second system 200. It is understood that the component type of the first switch K1 and the power of the DCDC converter can be adaptively selected according to actual needs.
In some embodiments, the battery management unit comprises: a second switch K2. The second switch K2 is electrically connected to the second power supply unit 320, and is used for controlling the conducting state of the second power supply unit 320 according to the control signal. Specifically, the battery management unit further includes a second switch K2 connected in parallel with the second power supply unit 320, and the second switch K2 is a MOS transistor. When the battery management unit detects that the second power supply unit 320 fails, the battery management unit controls the conduction of the MOS transistor, so that the second power supply unit 320 is in a short-circuit state, thereby protecting the safety of the second power supply unit 320 and the entire vehicle. It is understood that the connection form (series or parallel connection, etc.) of the second switch K2 and the second power supply unit 320 and the component type of the second switch K2 can also be adaptively adjusted according to actual situations.
In some embodiments, the battery management unit further comprises: fuse F1. One end of the fuse F1 is electrically connected to the second switch K2, and the other end of the fuse F1 is electrically connected to the other end of the second power supply unit 320. Specifically, the fuse F1 is connected in series in the parallel circuit of the second switch K2 and the second power supply unit 320, so as to prevent the short circuit of the second power supply unit 320 caused by the short-circuit failure of the MOS transistor under the normal condition of the second power supply unit 320.
In some embodiments, the battery system further comprises: the disconnection module 600. One end of the disconnection module 600 is electrically connected to one end of the first power supply unit 310, and the other end of the disconnection module 600 is electrically connected to the first system 100. The disconnection module 600 is further electrically connected to the battery management unit, and the disconnection module 600 is configured to control a connection state between the first power supply unit 310 and the first system 100 according to the control signal. Specifically, the disconnection module 600 is connected in series in the power supply loop of the power supply module 300 to the first power supply unit 310. When the automobile is in any one of the power-off state, the sleep state and the like, the battery management unit generates a corresponding control signal, and the disconnection module 600 disconnects the connection line between the power supply module 300 and the first power supply unit 310 according to the control signal, so as to cut off the power supply to the first power supply unit 310, thereby reducing the waste of power supply resources.
In some embodiments, the disconnect module 600 includes: a third switch K3 and a fourth switch K4. The third switch K3 is electrically connected to the first power supply unit 310, the battery management unit, and the first system 100, respectively, and the third switch K3 is used to control the connection state of the first power supply unit 310 to the first system 100 according to a control signal. The fourth switch K4 is electrically connected to the first power supply unit 310, the first system 100 and the battery management unit, respectively, and the fourth switch K4 is used to control the precharge operation of the first system 100 according to the control signal. Specifically, the third switch K3 and the fourth switch K4 are connected in parallel, and the third switch K3 and the fourth switch K4 are respectively connected in series on the power supply loop of the power supply module 300 to the first system 100. And the third switch K3 and the fourth switch K4 are both relays, and the controllable ends of the third switch K3 and the fourth switch K4 are respectively and electrically connected with the battery management unit. When the first system 100 is pre-charged, the battery management unit controls the fourth switch K4 to be closed through the control signal. The resistor R0 connected in series with the fourth switch K4 is a pre-charge resistor. When the automobile is in any one of the power-off state, the sleep state and the like, the battery management unit controls the third switch K3 to be turned off through the control signal, namely, the power supply module 300 is turned off to supply power to the first power supply unit 310. It can be understood that the component types of the third switch K3 and the fourth switch K4 can also be adaptively selected according to actual situations.
In some embodiments, the first power supply unit 310 includes at least one ternary battery, and the second power supply unit 320 includes at least one lithium iron phosphate battery. Specifically, when the first system 100 represents a power system and the second system 200 represents a vehicle power module 300, the first power unit 310 includes at least one ternary battery to provide higher power density and energy density. The second power supply unit 320 includes at least one lithium iron phosphate battery, or a plurality of lithium iron phosphate batteries connected in parallel.
Referring to fig. 4, in a specific embodiment, the battery management unit includes an MCU unit, an AFE unit, a switch management unit, an SBC unit, and a CAN communication unit. The MCU unit is used for generating a control signal; the AFE unit is used for collecting a first electric signal, a third electric signal and the like; the switch management unit is used for controlling the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4; the SBC unit is used for carrying out braking control; the CAN unit is used for being in communication connection with a Vehicle Control Unit (VCU).
When the automobile is in a normal operation mode, the battery management unit controls the third switch K3 to be closed, the power supply module 300 provides a supply voltage of 48V for the first system 100, and the second power supply unit 320 provides a supply voltage of 12V for the second system 200. At this time, since the second power supply unit 320 not only supplies the voltage to the first power supply unit 310, so that the power supply module 300 generates the 48V power supply voltage, but also simultaneously supplies the 12V power supply voltage to the second system 200. Therefore, in order to ensure battery equalization of the second power supply unit 320, the battery management unit controls the voltage conversion unit to convert the 48V voltage generated by the power supply module 300 to perform a power supplement operation on the second power supply unit 320.
When the automobile is in the power-off mode, the battery management unit controls the third switch K3 to be turned off, the first system 100 has no power supply signal, and the second power supply unit 320 provides 12V power supply voltage for the second system 200. At this time, the voltage conversion unit is in a low output mode, the voltage conversion unit performs conversion operation on the voltage of 48V, and the output current of the voltage conversion unit is equal to the consumption current of the whole vehicle electrified load, so that the second power supply unit 320 is subjected to power supplement operation.
When the automobile is in the sleep mode, the battery management unit controls the third switch K3 to be switched off, the first system 100 has no power supply signal, and the whole automobile is in the sleep state. At this time, the second power supply unit 320 provides the sleep current for the electric appliances of the entire vehicle. The battery management unit wakes up regularly and monitors the battery status of the second power supply unit 320. The battery management unit enables the voltage conversion unit, and controls the voltage conversion unit to output a small current to perform a power supplement operation on the second power supply unit 320.
When the automobile is in a failure mode, namely any one of the failures such as overvoltage, undervoltage, open circuit and short circuit of the second power supply unit 320 occurs, the battery management unit controls the first switch K1 to be switched off and controls the second switch K2 to be switched on. At this time, the voltage conversion unit is enabled by the battery management unit and enters a derating operation mode. The input voltage of the voltage conversion unit is changed from 48V to 36V, and the voltage conversion unit converts the 36V voltage into 12V voltage to maintain power supply to the second system 200.
In some embodiments, the first switch K1, the second switch K2, and the third switch K3 may also be MOS transistors, and are integrated in the battery management unit.
The battery system provided by the embodiment of the application integrates the first power supply unit and the second power supply unit to form the power supply module, so that the power supply module can simultaneously supply power to the first system and the second system, the quantity of power supply modules of the whole vehicle is reduced, and the space of the whole vehicle occupied by the power supply module is reduced. The first electric signal is converted by the voltage conversion unit, so that the supplementary operation of the second power supply unit is realized, and the battery is balanced; and when the second power supply unit breaks down, the second power supply unit can be replaced to supply power for the second system, and the strain capacity and the reliability of the battery system are improved.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Claims (10)
1. Battery system, be applied to the car, its characterized in that includes:
the power supply module is electrically connected with a first system of the automobile and a second system of the automobile respectively and is used for providing a first electric signal for the first system; or the power supply module is used for providing the first electrical signal for the first system and providing the second electrical signal for the second system;
the conversion module is electrically connected with the power supply module, the first system and the second system respectively and is used for converting the first electric signal into a third electric signal;
the third electrical signal is used for supplying power to the power supply module or supplying power to the second system.
2. The battery system of claim 1, wherein the power module comprises:
one end of the first power supply unit is electrically connected with the conversion module and the first system respectively, and the first power supply unit is used for providing an initial electric signal;
the second power supply unit is electrically connected with the other end of the first power supply unit, the conversion module and the second system respectively, and is used for providing the second electric signal;
wherein, U1＝U0+U2，U1Representing said first electrical signal, U0Representing said initial electrical signal, U2Representing the second electrical signal.
3. The battery system of claim 2, further comprising:
the battery management module is electrically connected with the power supply module and the conversion module respectively, and is used for collecting a first current, a second current and a third current and generating a control signal according to at least one of the first current, the second current and the third current;
wherein the first current represents a current of the power supply module, the second current represents a current of the second power supply unit, and the third current represents a current of the conversion module; and the conversion module controls the size or the transmission state of the third electric signal according to the control signal.
4. The battery system of claim 3, wherein the battery management module comprises:
one end of the first acquisition unit is electrically connected with the other end of the second power supply unit, the other end of the first acquisition unit is electrically connected with the first system, and the first acquisition unit is used for acquiring the first current;
one end of the second acquisition unit is electrically connected with one end of the second power supply unit, the other end of the second acquisition unit is electrically connected with the second system, and the second acquisition unit is used for acquiring the second current;
the battery management unit is respectively electrically connected with the first power supply unit, the second power supply unit, the conversion module, the first acquisition unit and the second acquisition unit, and is used for acquiring the third current and generating the control signal according to at least one of the first current, the second current and the third current.
5. The battery system of claim 4, wherein the conversion module comprises:
the first switch is electrically connected with one end of the second power supply unit, the battery management unit and the second system respectively;
a voltage conversion unit electrically connected to the first switch, one end of the first power supply unit, the other end of the second power supply unit, and the battery management unit, respectively, the voltage conversion unit being configured to convert the first electrical signal into the third electrical signal,
the first switch is configured to control a transmission state of the third electrical signal according to the control signal, and the voltage conversion unit is further configured to control a magnitude of the third electrical signal according to the control signal.
6. The battery system according to claim 5, wherein the battery management unit includes:
and the second switch is electrically connected with the second power supply unit and is used for controlling the conduction state of the second power supply unit according to the control signal.
7. The battery system of claim 6, wherein the battery management unit further comprises:
and one end of the fuse is electrically connected with the second switch, and the other end of the fuse is electrically connected with the other end of the second power supply unit.
8. The battery system according to any one of claims 4 to 7, further comprising:
one end of the circuit breaking module is electrically connected with one end of the first power supply unit, and the other end of the circuit breaking module is electrically connected with the first system;
the circuit breaking module is also electrically connected with the battery management unit and is used for controlling the connection state of the first power supply unit and the first system according to the control signal.
9. The battery system of claim 8, wherein the disconnect module comprises:
the third switch is respectively electrically connected with the first power supply unit, the battery management unit and the first system, and is used for controlling the connection state of the first power supply unit and the first system according to the control signal;
a fourth switch electrically connected to the first power supply unit, the first system, and the battery management unit, respectively, the fourth switch being configured to control a precharge operation of the first system according to the control signal.
10. The battery system of claim 9, wherein the first power supply unit comprises at least one ternary battery and the second power supply unit comprises at least one lithium iron phosphate battery.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113381474A (en) * | 2021-06-02 | 2021-09-10 | 欣旺达电动汽车电池有限公司 | Battery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113381474A (en) * | 2021-06-02 | 2021-09-10 | 欣旺达电动汽车电池有限公司 | Battery system |
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518000 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |
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