CN208970567U - Power battery pack and its electric car - Google Patents
Power battery pack and its electric car Download PDFInfo
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- CN208970567U CN208970567U CN201821513597.XU CN201821513597U CN208970567U CN 208970567 U CN208970567 U CN 208970567U CN 201821513597 U CN201821513597 U CN 201821513597U CN 208970567 U CN208970567 U CN 208970567U
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- 238000010586 diagram Methods 0.000 description 7
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- 238000005516 engineering process Methods 0.000 description 3
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- 230000006378 damage Effects 0.000 description 2
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- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a kind of power battery pack and its electric cars.The power battery pack includes: at least two battery attached bags, and the anode of the first battery attached bag at least two battery attached bags and the anode of battery pack connect, and the negative terminal of the second battery attached bag at least two battery attached bags and the cathode of battery pack connect；Controllable switch, controllable switch are connect with the anode of each battery attached bag and negative terminal respectively, can switch at least two battery attached bags between series connection and parallel connection.The utility model proposes power battery pack and its electric car, when multiple battery attached bag parallel connections, the charging voltage for reducing battery system solves the problems, such as that high voltage battery system charges on the lower direct-current charging post of output voltage, enhances the adaptability of vehicle.
Description
Technical field
The utility model relates to electric vehicle engineering field, in particular to a kind of power battery pack and its electric car.
Background technique
In recent years, under the guidance of national new-energy automobile development strategy, the exploitation and application of pure electric automobile are entered
Fast-developing period.With the continuous promotion required pure electric automobile course continuation mileage, battery system energy is also continuously increased.Its
In, the battery system in the section 300V-400V relative to current mainstream improves the technology of the voltage (500V or more) of battery system
Route presents certain advantage: for battery system under same rated energy, higher voltage can significantly reduce work
Electric current, the relevant thermal losses of electric current and electric current it is square directly proportional, therefore reduce electric current and can significantly reduce thermal losses, promoted
The energy conversion efficiency of battery system；In addition, lesser electric current can also reduce battery system high voltage cable type selecting specification, reduce
The cost of battery pack, while alleviating the weight of battery system, further promote the energy density of battery system.
High voltage battery system has the advantage in certain design, but output interval is 200V-500V's on the market at present
DC charging motor is still very much, and the direct-current charging post of only a small number of brands supports high-voltage charge, the main reason is that at present
The battery technology scheme of 500V or more is less, but improve cell system voltage be the following cell system design important trend it
One.Therefore, the electric car for carrying high voltage battery system, which has to face DC charging, completely to be filled, or even can not charge
Awkward circumstances.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.
For this purpose, the first aspect embodiment of the utility model proposes a kind of power battery pack.The power battery pack solves
High voltage battery system enhances the adaptability of vehicle the problem of charging on the lower direct-current charging post of output voltage.
To achieve the goals above, the utility model proposes power battery pack, comprising:
At least two battery attached bags, the anode and the battery of the first battery attached bag in at least two batteries attached bag
The anode of packet connects, and the negative terminal of the second battery attached bag in at least two batteries attached bag and the cathode of the battery pack connect
It connects；Controllable switch, the controllable switch are connect with the anode of each battery attached bag and negative terminal respectively, can be by described at least two
A battery attached bag switches between series connection and parallel connection.
The utility model proposes power battery pack, can be to the series-parallel system of multiple battery attached bags in battery system
It switches over, when multiple battery attached bag parallel connections, reduces the charging voltage of battery system, solve high voltage battery system and exist
The problem of charging on the lower direct-current charging post of output voltage, enhances the adaptability of vehicle.
In addition, can also have the following additional technical features: according to the above-mentioned power battery pack of the utility model
In some instances, the quantity of the battery attached bag is 2, and the controllable switch includes: first switch, described the
The first end of one switch is connect with the negative terminal of the first battery attached bag, the second end of the first switch and the second battery attached bag
Anode connection, for being switched on or switched off between the negative terminal of the first battery attached bag and the anode of the second battery attached bag
Connection；Second switch, the first end of the second switch are connect with the anode of the first battery attached bag, the second switch
Second end is connect with the anode of the second battery attached bag, for being switched on or switched off the anode and described second of the first battery attached bag
Connection between the anode of battery attached bag；Third switch, the first end of the third switch and bearing for the first battery attached bag
The second end of end connection, the third switch is connect with the negative terminal of the second battery attached bag, for being switched on or switched off first electricity
In some instances, the quantity of the battery attached bag is 2 to the negative terminal of pond packet, and the controllable switch is many-contact relay,
The many-contact relay includes: the first contact, and first contact is connect with the negative terminal of the first battery attached bag；Second touching
Point, second contact are connect with the anode of the second battery attached bag；Third contact, the third contact and first electricity
The anode connection of pond packet；4th contact, the 4th contact are connect with the negative terminal of the second battery attached bag；The multiconductor
Relay, the connection for being switched on or switched off between first contact and second contact, is switched on or switched off described first
Connection between contact and the 4th contact, the connection being switched on or switched off between second contact and the third contact.
In some instances, the first switch and/or the second switch and/or third switch, for switching
Relay.
In some instances, the first switch and/or the second switch and/or third switch, are hilted broadsword
Single-throw switch.
In some instances, the quantity for the battery modules for including in each battery attached bag is equal.
In some instances, the power battery pack further include: main positive relay, the anode of the first battery attached bag
It is connect by the positive relay of the master with the anode of the battery pack；The negative terminal of main negative relay, the second battery attached bag is logical
The negative relay of the master is crossed to connect with the cathode of the battery pack.
In some instances, the power battery pack further include: preliminary filling relay, the first end of the preliminary filling relay
It is connect with the anode of the first battery attached bag；Preliminary filling resistance, the first end of the preliminary filling resistance and the preliminary filling relay
Second end connection, the second end of the preliminary filling resistance are connect with the anode of the battery pack.
In some instances, the power battery pack further include: current sensor, the negative relay of master pass through described
Current sensor is connect with the cathode of the battery pack.
The utility model second aspect embodiment proposes a kind of electric car, including as the utility model first aspect is implemented
The power battery pack that example proposes.
The power battery pack and its electric car that the utility model embodiment proposes, by batteries multiple in battery system
The series-parallel system of attached bag switches over, to realize when multiple battery attached bag parallel connections, under the charging voltage of battery system
Drop, solves the problems, such as that high voltage battery system charges on the lower direct-current charging post of output voltage, enhances the suitable of vehicle
Ying Xing.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the time of the utility model.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the power battery pack of the utility model one embodiment；
Fig. 2 is the circuit diagram according to the power battery pack of the utility model one embodiment；
Fig. 3 is the circuit theory schematic diagram that battery attached bag is under series connection；
Fig. 4 is the circuit theory schematic diagram that battery attached bag is under parallel connection；
Fig. 5 is the circuit diagram according to the power battery pack of the utility model another embodiment；
Fig. 6 is the structural schematic diagram according to a kind of electric car of the utility model one embodiment.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
The power battery pack proposed according to the utility model embodiment and its electric car are described referring to the drawings.
As shown in Figure 1, power battery pack 100 provided by the embodiment of the utility model includes: at least two battery attached bags 110
It with the battery pack 100 that at least two battery attached bags 110 include 2 battery attached bags 110 is to illustrate in Fig. 1 with controllable switch 120
Out, including the first battery attached bag a and the second battery attached bag b.
The anode of the first battery attached bag a at least two battery attached bags 110 is connect with the anode of battery pack 100, at least
The negative terminal of the second battery attached bag b in two battery attached bags 110 is connect with the cathode of battery pack 100.And wherein controllably open 120 points
It does not connect, at least two battery attached bags 110 can be cut between series connection and parallel connection with the anode of each battery attached bag 110 and negative terminal
It changes.
The utility model is switched over by the series-parallel system to battery attached bags 110 multiple in battery system, thus real
Show when multiple battery attached bags 110 are in parallel, the charging voltage decline of battery system solves high voltage battery system and exporting
The problem of charging on the lower direct-current charging post of voltage, enhances the adaptability of vehicle.
Fig. 2 is the circuit diagram according to the power battery pack 100 of the utility model one embodiment.As shown in Fig. 2,
On the basis of embodiment illustrated in fig. 1, the quantity for the battery modules for including in each battery attached bag 110 can be equal.Such case
Under, if multiple battery attached bags 110 inside battery system and be connected on charging pile, all battery attached bags 110 can be same
Shi Jinhang charging, and the consistency of state of charge between the multiple battery attached bags 110 of internal system is also ensured.
In one embodiment of the utility model, multiple battery attached bags 110 include: the electricity of the first battery attached bag a and second
Wrap b in pond, wherein the anode of the first battery attached bag a is connect with battery pack anode, the negative terminal and battery pack of the second battery attached bag b
Cathode connection.
Specifically, in the embodiments of the present invention, the series connection single battery of internal system is divided into 2 parts, i.e.,
It is divided into 2 battery attached bags 110 (the first battery attached bag a and the second battery attached bag b), by former to battery system internal high pressure route
Its internal 2 battery attached bag 110 in initial series connection quickly and easily can be switched to pass in parallel by the improvement of reason
System achievees the purpose that reduce charging voltage.After wherein 2 battery attached bags 110 are changed into parallel connection from series connection, battery system
The voltage that it is requested to charging pile of uniting reduces, and request electric current is increase accordingly.
After 110 parallel connection of battery system internal cell attached bag, its voltage requested to charging pile of battery system is reduced, request
Electric current is increase accordingly.For example, the high voltage battery system (request electric current is 120A) that voltage range is 500V-600V, if using
Output is up to that the charging pile of 500V then cannot achieve charging.Battery system switches internal cell attached bag 110 through the above scheme
After series-parallel relationship, charging voltage section becomes 250V-300V (request electric current is 240A), it is thus achieved that high-voltage battery
The purpose that system charges on the relatively low charging pile of output voltage.
Further, the switching of the series-parallel state of battery system internal cell attached bag 110 depends on controllable switch 120 to every
The selection and connection of a 110 anode of battery attached bag and negative terminal.As a kind of feasible 120 control program of controllable switch, battery
When the quantity of packet 110 is 2, as shown in Fig. 2, the controllable switch 120 in embodiment illustrated in fig. 1 includes: first switch S1, second
Switch S2 and third switch S3.
Specifically, the first end of first switch S1 is connect with the negative terminal of the first battery attached bag a, the second end of first switch S1
It is connect with the anode of the second battery attached bag b, for being switched on or switched off the negative terminal and the second battery attached bag b of the first battery attached bag a
Connection between anode.
The first end of second switch S2 is connect with the anode of the first battery attached bag a, the second end of second switch S2 and second
The anode of battery attached bag b connects, for be switched on or switched off the first battery attached bag a anode and the second battery attached bag b anode it
Between connection.
The first end of third switch S3 is connect with the negative terminal of the first battery attached bag a, the second end and second of third switch S3
The negative terminal of battery attached bag b connects, for be switched on or switched off the first battery attached bag a negative terminal and the second battery attached bag b negative terminal it
Between connection.
As the first embodiments possible, first switch S1 and/or second switch S2 and/or third switch S3 can
Think switching relay.
As second of embodiments possible, first switch S1 and/or second switch S2 and/or third switch S3 can
Think single-pole single-throw switch (SPST).
As shown in Fig. 2, specifically, being set between the negative terminal of the first battery attached bag a and the positive terminal of the second battery attached bag b
It sets first switch S1 and for example switches relay 1, in the positive terminal of the first battery attached bag a and the positive terminal of the second battery attached bag b
Second switch S2 is set between son and for example switches relay 2, in the negative terminal of the first battery attached bag a and bearing for the second battery attached bag b
Third switch S3 is set between end and for example switches relay 3.Wherein switch relay 1, switching relay 2 and switching relay 3
It is respectively used to the connection being switched on or switched off between the negative terminal of the first battery attached bag a and the anode of the second battery attached bag b, for connecting
Or disconnect the first battery attached bag a anode and the second battery attached bag b anode between connection and for being switched on or switched off first
Connection between the negative terminal of battery attached bag a and the negative terminal of the second battery attached bag b.
Wherein, above-mentioned switching relay is single-pole single-throw(SPST relay, is controlled by an excitation power supply, by giving switching relay
One input quantity of input circuit of device, if the input quantity reaches the item that switching relay is able to carry out closing or opening operation
Part, the switching relay can in output control loop electric signal Spline smoothing, control cut-offfing for the electric current of controlled circuit.
According to a kind of controllable switch 120 that the utility model embodiment proposes, battery system internal cell attached bag 110 is gone here and there simultaneously
When the concrete operations of connection switching include: that DC charging starts, battery system and charging pile pass through low voltage communication message interaction information.
When charger can provide the voltage value for meeting the needs of battery system, switching relay 1 is closed, switches relay 2 and cuts
Changing relay 3 is off-state, and the first battery attached bag a and the second battery attached bag b belongs to series relationship, electricity inside battery system at this time
Cell system internal high pressure principle becomes as shown in circuit theory Fig. 3, and battery system is sent according to by low voltage communication to charging pile
Voltage, electric current are requested, and executes charging according to normal charge process；When battery system detects that charging pile can not provide battery system
When voltage value needed for system, switching relay 1 is first turned off state by battery system, then will successively be switched relay 2 and be cut
The closure of relay 3 is changed, the first battery attached bag a and the second battery attached bag b is switched to parallel way, battery system by series system at this time
System internal high pressure principle becomes as shown in circuit theory Fig. 4, and battery system passes through low according to the linking status inside present battery
Pressure communication sends request voltage, electric current to charging pile, and (battery attached bag 110 is changed into parallel connection by series connection, required to mention
The charging voltage of confession becomes 0.5 times of primary voltage, and the charging current needed then becomes 2 times of primary current) and according to normal charge
Process executes charging, thus achievees the purpose that reduce charging voltage.
Specifically, low-voltage communication system can be provided by voltage needed for electric car charging and electric automobile charging pile
Maximum voltage comparison, judge whether the series-parallel shape for needing to control 120 switching system internal cell attached bag 110 of controllable switch
State.The low-voltage communication system is located inside battery system, and the maximum voltage that wherein electric automobile charging pile can be provided is by charging
Stake passes to low-voltage communication system in a manner of low voltage communication message.
In another embodiment of the utility model, another feasible controllable switch control program is additionally provided, such as
Shown in Fig. 5, the controllable switch 120 in embodiment illustrated in fig. 1 can be many-contact relay, when the quantity of battery attached bag 110 is 2
When a, many-contact relay includes: the first contact D1, the second contact D2, third contact D3 and the 4th contact D4.
Wherein, the first contact D1 is connect with the negative terminal of the first battery attached bag a, the second contact D2 and the second battery attached bag b's
Anode connection, third contact D3 are connect with the anode of the first battery attached bag a, the negative terminal of the 4th contact D4 and the second battery attached bag b
Connection.
For the many-contact relay, there are the connection for being switched on or switched off D2 between the first contact D1 and the second contact,
The connection being switched on or switched off between the first contact D1 and the 4th contact D4, be switched on or switched off the second contact D2 and third contact D3 it
Between connection these three operation.And connection and the second contact D2 and the 4th contact D4 between the first contact D1 and third contact D3
Between connection be 110 short circuit of one of battery attached bag, it is electric under 110 up to a hundred volts of batteries of electric automobile attached bag of voltage
Pond circuit, which will soon fuse to burn, causes danger, and the connection between third contact D3 and the 4th contact D4 is then by two batteries
Attached bag 110 is connected in another short-circuit loop, higher voltage, while bigger harm can be also caused to electric car, therefore this
Between the contact of three kinds of connection types (i.e. between the first contact D1 and third contact D3, the second contact D2 and the 4th contact D4 it
Between and third contact D3 and the 4th contact D4 between) should remain off, avoid danger.
Further, the controllable switch 120 can be many-contact relay, or multi-pole, multi-throw switch.
As shown in figure 5, the concrete operations that battery system internal cell attached bag 110 switches in series and parallel include: to work as DC charging
When beginning, battery system and charging pile pass through low voltage communication message interaction information.Meet battery system when charger can provide
Demand voltage value, battery system control many-contact relay make the first contact D1 and the second contact D2 link (other touch
It is off-state between point), the first battery attached bag a and the second battery attached bag b belongs to series relationship, battery inside battery system at this time
Internal system high pressure principle becomes as shown in circuit theory Fig. 3, and battery system passes through according to the linking status inside present battery
Low voltage communication sends request voltage, electric current to charging pile, and executes charging according to normal charge process；When battery system detects
When voltage value needed for charging pile can not provide battery system, battery system control many-contact relay make the first contact D1 with
4th contact D4 link, the second contact D2 and third contact D3 link (being off-state between other contacts), at this time the first electricity
Pond packet a and the second battery attached bag divide b to be switched to parallel way by series system, and battery system internal high pressure principle becomes such as figure
Shown in 4, battery system sends request voltage, electricity to charging pile by low voltage communication according to the linking status inside present battery
Stream, (request voltage is 0.5 times of primary voltage, and request electric current is 2 times of primary current) simultaneously execute charging according to normal charge process,
Thus achieve the purpose that reduce charging voltage.
The structure for another power battery pack that the utility model embodiment also proposes.As shown in Figure 2-5, power battery pack
100 further include: main positive relay 130, main negative relay 140, preliminary filling relay 150, precharge group 160 and current sensor
170。
Wherein, the anode of relay 130 positive for master, the first battery attached bag a passes through main positive relay 130 and power power
The anode connection of battery pack 100.Relay 140 negative for master, the negative terminal of the second battery attached bag b by main negative relay 140 with
The cathode of power battery pack 100 connects.For preliminary filling relay 150, the first end of preliminary filling relay 150 and the first battery attached bag
The anode of a connects.For preliminary filling resistance 160, the first end of preliminary filling resistance 160 is connect with the second end of preliminary filling relay 150, in advance
The second end of charging resistance 160 is connect with the anode of power battery pack 100.For current sensor 170, main negative relay 140 is logical
Over-current sensor 170 is connect with the cathode of power battery pack 100.
Specifically, in battery system discharge process, battery front end is with the presence of biggish capacitor C, with battery attached bag 110
Parallel connection, when electric car is changed into discharge condition from static state, without charge presence or only very low residual electricity on capacitor C when static
Pressure, when battery system starts to export outward and when without preliminary filling electric-type, main positive relay 130 and main negative relay 140 directly with electricity
Hold C to connect, cell voltage has high voltage at this time, and the voltage value of capacitor C is equivalent to instantaneous short circuit close to 0, wherein load is to lead
The resistance value of resistance between line and relay contact, the resistance is typically small, under the action of battery high voltage, often have compared with
Big electric current generates, and is damaged the positive relay 130 of winner with main negative relay 140.
Further, pre-charge process is added, the main positive relay 130 of control disconnects in advance, allow the biggish preliminary filling of impedance after
Electric appliance 150 is connected with the preliminary filling electrical circuit that preliminary filling resistance 160 is constituted.In some cases, such as we select 200 Europe herein
The preliminary filling resistance of nurse, the voltage difference between cell voltage and capacitor C are calculated according to 300 volts, it can be deduced that in preliminary filling electrical circuit
Maximum current be 1.5 amperes, without departing from the safe current value of preliminary filling relay 150 and main negative relay 140, be pre-charged at this time
Circuit safety.
Further, with the work in preliminary filling circuit, the voltage on capacitor C is higher and higher, when close to cell voltage,
Preliminary filling electrical circuit is cut off at this time, connects main positive relay 130, since voltage is sufficiently large on capacitor C, the voltage in discharge loop is
Cell voltage and the pressure difference of capacitor C voltage are smaller, so that will not occur biggish rush of current in battery discharge circuit again.
Wherein, the judgment method whether completed for precharge can optionally be adopted in real time by current sensor 170
Collect the electric current in preliminary filling electrical circuit, when the electric current in circuit is close to 0 ampere-hour, identification battery system precharge is completed, and output is pre-
Charging completion signal, control preliminary filling relay 150 is closed and main positive relay 130 is opened；Optionally, it is also an option that acquisition electricity
Pond end voltage and capacitor C-terminal voltage, and be compared, voltage tends to that equal (voltage value of capacitor C reaches cell voltage at two
90%) when, can judge precharge complete, output precharge complete signal.
In the power battery pack 100 that the embodiment of the present invention proposes, by setting preliminary filling circuit to the big of electric machine controller
Capacitor charges, and avoids the issuable spark arcing of impacting with high pressure and the destruction to relay, improves the peace of vehicle
Full performance.
In order to realize above-described embodiment, as shown in fig. 6, the utility model embodiment additionally provides a kind of electric car 61,
It includes the power battery pack 100 that above-described embodiment proposes.
According to the electric car 61 that the utility model embodiment proposes, by battery attached bags 110 multiple in battery system
Series-parallel system switch over, to realize when multiple battery attached bags 110 are in parallel, under the charging voltage of battery system
Drop, solves the problems, such as that high voltage battery system charges on the lower direct-current charging post of output voltage, enhances the suitable of vehicle
Ying Xing.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is orientation based on the figure
Or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limit to the utility model
System.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (10)
1. a kind of power battery pack characterized by comprising
At least two battery attached bags, the anode of the first battery attached bag in at least two batteries attached bag and the battery pack
Anode connects, and the negative terminal of the second battery attached bag in at least two batteries attached bag is connect with the cathode of the battery pack；
Controllable switch, the controllable switch are connect with the anode of each battery attached bag and negative terminal respectively, can be by described at least
Two battery attached bags switch between series connection and parallel connection.
2. power battery pack according to claim 1, which is characterized in that the quantity of the battery attached bag be 2, it is described can
Control switchs
First switch, the first end of the first switch are connect with the negative terminal of the first battery attached bag, the first switch
Second end is connect with the anode of the second battery attached bag, for being switched on or switched off the negative terminal and described second of the first battery attached bag
Connection between the anode of battery attached bag；
Second switch, the first end of the second switch are connect with the anode of the first battery attached bag, the second switch
Second end is connect with the anode of the second battery attached bag, for being switched on or switched off the anode and described second of the first battery attached bag
Connection between the anode of battery attached bag；
The first end of third switch, the third switch is connect with the negative terminal of the first battery attached bag, the third switch
Second end is connect with the negative terminal of the second battery attached bag, for being switched on or switched off the negative terminal and described second of the first battery attached bag
Connection between the negative terminal of battery attached bag.
3. power battery pack according to claim 2, which is characterized in that the first switch and/or described second open
It closes and/or the third switchs, to switch relay.
4. power battery pack according to claim 2, which is characterized in that the first switch and/or described second open
It closes and/or the third switchs, be single-pole single-throw switch (SPST).
5. power battery pack according to claim 1, which is characterized in that the quantity of the battery attached bag be 2, it is described can
Control switch is many-contact relay；The many-contact relay includes:
First contact, first contact are connect with the negative terminal of the first battery attached bag；
Second contact, second contact are connect with the anode of the second battery attached bag；
Third contact, the third contact are connect with the anode of the first battery attached bag；
4th contact, the 4th contact are connect with the negative terminal of the second battery attached bag；
The many-contact relay, the connection for being switched on or switched off between first contact and second contact are connected
Or the connection between disconnection first contact and the 4th contact, it is switched on or switched off second contact and the third is touched
Connection between point.
6. power battery pack according to claim 1-5, which is characterized in that include in each battery attached bag
Battery modules quantity it is equal.
7. power battery pack according to claim 1-5, which is characterized in that further include:
The anode of main positive relay, the first battery attached bag is connected by the anode of the positive relay of the master and the battery pack
It connects；
The negative terminal of main negative relay, the second battery attached bag is connected by the negative relay of the master and the cathode of the battery pack
It connects.
8. power battery pack according to claim 7, which is characterized in that further include:
Preliminary filling relay, the first end of the preliminary filling relay are connect with the anode of the first battery attached bag；
Preliminary filling resistance, the first end of the preliminary filling resistance are connect with the second end of the preliminary filling relay, the preliminary filling resistance
Second end is connect with the anode of the battery pack.
9. power battery pack according to claim 7, which is characterized in that further include:
Current sensor, the negative relay of master are connect by the current sensor with the cathode of the battery pack.
10. a kind of electric car characterized by comprising such as the described in any item power battery packs of claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821513597.XU CN208970567U (en) | 2018-09-17 | 2018-09-17 | Power battery pack and its electric car |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821513597.XU CN208970567U (en) | 2018-09-17 | 2018-09-17 | Power battery pack and its electric car |
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| CN208970567U true CN208970567U (en) | 2019-06-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429671A (en) * | 2019-06-21 | 2019-11-08 | 北京航空航天大学 | A kind of electric car high-adaptability charging system and method |
| CN111463394A (en) * | 2020-06-22 | 2020-07-28 | 南京大策文化传播有限公司 | Novel series-parallel battery pack switching device |
| CN114506225A (en) * | 2022-02-22 | 2022-05-17 | 贺洪芝 | Battery series-parallel connection switching main circuit without power output interruption, system and method |
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2018
- 2018-09-17 CN CN201821513597.XU patent/CN208970567U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429671A (en) * | 2019-06-21 | 2019-11-08 | 北京航空航天大学 | A kind of electric car high-adaptability charging system and method |
| CN111463394A (en) * | 2020-06-22 | 2020-07-28 | 南京大策文化传播有限公司 | Novel series-parallel battery pack switching device |
| CN114506225A (en) * | 2022-02-22 | 2022-05-17 | 贺洪芝 | Battery series-parallel connection switching main circuit without power output interruption, system and method |
| CN114506225B (en) * | 2022-02-22 | 2022-09-13 | 贺洪芝 | Battery series-parallel connection switching main circuit without power output interruption, system and method |
| WO2023159704A1 (en) * | 2022-02-22 | 2023-08-31 | 贺洪芝 | Battery series-parallel connection switching main circuit without power output interruption, and system and method |
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