CN219145054U - Battery system - Google Patents

Abstract

The utility model relates to the field of batteries and discloses a battery system, which comprises a high-voltage box, wherein the high-voltage box comprises a first input end, a first output end, a second input end and a second output end, the first input end is connected with the first output end through a first controllable switch, and the second input end is connected with the second output end; the high pressure tank further includes: and the positive electrode end of the power supply circuit is connected with the second output end of the high-voltage box through the second controllable switch, and the negative electrode end of the power supply circuit is connected between the first controllable switch and the first output end of the high-voltage box in series. The negative electrode end of the power supply circuit in the high-voltage box is connected between the first controllable switch and the first output end in series, namely, the negative electrode end branch of each power supply circuit of the high-voltage box and the low-voltage branch of the high-voltage box share the controllable switch, so that the arrangement number of the controllable switches in the high-voltage box and the wiring number in the high-voltage box can be reduced, the volume of the high-voltage box and the weight of the high-voltage box can be optimized, and the effect of reducing the cost can be achieved.

Description

Battery system

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery system.

Background

The high voltage tank is an important component of the battery system. In the related art, the high-pressure tank has higher cost and weakens the competitiveness of the product. And the high-voltage box occupies a large volume, which is unfavorable for the space arrangement of a battery system and the improvement of the energy density of the system.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to overcome the disadvantages of the related art described above, and to provide a battery system.

The disclosure provides a battery system, which is characterized by comprising a high-voltage box 100, wherein the high-voltage box comprises a first input end, a first output end, a second input end and a second output end, the first input end is connected with the first output end through a first controllable switch, and the second input end is connected with the second output end; the high pressure tank further includes: the positive end of the power supply circuit is connected with the second output end of the high-voltage box through a second controllable switch, and the negative end of the power supply circuit is connected between the first controllable switch and the first output end of the high-voltage box in series.

The battery system that this disclosure provided, second input and second output lug connection in the high-voltage box, first input and first output lug are connected through first controllable switch, and the negative pole end of the power supply circuit in the high-voltage box concatenates between first controllable switch and first output lug, the negative pole end branch road of each power supply circuit of high-voltage box and the low-voltage branch road sharing controllable switch of high-voltage box promptly, thereby can reduce the controllable switch's in the high-voltage box layout quantity, and the wiring quantity in the high-voltage box, can optimize the volume and the weight of high-voltage box, and can play reduce cost's effect.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

FIG. 1 is a schematic view of a high pressure tank according to one embodiment of the present disclosure;

fig. 2 is a schematic structural view of a battery system according to an embodiment of the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

In the present application, unless explicitly specified and limited otherwise, the term "coupled" is to be construed broadly, and for example, "coupled" may be either fixedly coupled, detachably coupled, or integrally formed; can be directly connected or indirectly connected through an intermediate medium. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. The first input end, the first output end, the second input end and the second output end.

The present disclosure provides a battery system, which may include a high-voltage tank, fig. 1 is a schematic structural diagram of the high-voltage tank according to an embodiment of the present disclosure, and as shown in fig. 1, a high-voltage tank 100 may include a first input terminal XS2, a first output terminal XSB, a second input terminal XS1, and a second output terminal XSA, wherein the first input terminal XS2 may be connected to the first output terminal XSB through a first controllable switch K1, and the second input terminal XS1 may be directly connected to the second output terminal XSA. The high voltage tank 100 may further include at least one power supply circuit, where a positive terminal of the power supply circuit may be connected to the second output terminal XSA of the high voltage tank 100 through the second controllable switch K2, and a negative terminal of the power supply circuit is connected in series between the first controllable switch K1 and the first output terminal XSB of the high voltage tank 100.

According to the battery system provided by the disclosure, the second input end XS1 and the second output end XSA in the high-voltage box 100 are directly connected, the first input end XS2 and the first output end XSB are connected through the first controllable switch K1, and the negative electrode end of the power supply circuit in the high-voltage box 100 is connected between the first controllable switch K1 and the first output end XSB in series, namely, the negative electrode end branch of each power supply circuit of the high-voltage box 100 shares the controllable switch with the low-voltage branch of the high-voltage box 100, so that the arrangement number of the controllable switches in the high-voltage box 100 and the wiring number in the high-voltage box 100 can be reduced, the volume and the weight of the high-voltage box 100 can be optimized, and the effect of reducing the cost can be played.

The high voltage box 100 according to the present disclosure refers to an electrical device capable of uniformly distributing and scheduling power signals provided from a battery system. The second input end XS1 is a connection end of the high voltage tank 100 for receiving the high voltage power signal, and the first input end XS2 is a connection end of the high voltage tank 100 for receiving the high voltage power signal. For example, the battery system may include a battery pack for providing the power signal. The second input XS1 of the high voltage tank 100 may be connected to the positive pole of the battery, and the first input XS2 of the high voltage tank 100 may be connected to the negative pole of the battery, so that the battery transmits a power signal to the high voltage tank 100 for power redistribution by the high voltage tank 100. In some embodiments, the second input XS1 may be referred to as the battery total positive terminal, the first input XS2 may be referred to as the battery total negative terminal, and accordingly, the first controllable switch K1 may be referred to as the total negative switch.

It should be understood that the number of second input terminals XS1 of the present disclosure corresponds to the number of first input terminals XS2 one by one, i.e. one second input terminal XS1 corresponds to one first input terminal XS2. And the number of the second input terminals XS1 and the number of the first input terminals XS2 correspond to the number of battery packs in the battery system, i.e., one battery pack has one second input terminal XS1 and one first input terminal XS2 connected thereto. In addition, the present disclosure is not limited to the number of battery packs, in other words, the present disclosure is not particularly limited to the number of the second input terminal XS1 and the first input terminal XS2 of the high-voltage tank 100.

The second output end XSA may be understood as a connection end of the high voltage tank 100 outputting a high voltage power signal to the electrical equipment, and the first output end XSB may be connected to a connection end of the high voltage tank 100 outputting a high voltage power signal to the electrical equipment. For example, the battery system may be applied to a vehicle, and the second output terminal XSA and the first output terminal XSB of the high voltage tank 100 may be connected to an electric device such as a motor, an air conditioner, or the like of the vehicle. In other words, the battery system may output the corresponding power signal to the powered device through the second output terminal XSA and the first output terminal XSB of the high voltage tank 100.

It should be noted that the voltage output terminal (including the first output terminal XSB and the second output terminal XSA) and the voltage input terminal (including the first input terminal XS2 and the second input terminal XS 1) of the high voltage tank 100 of the present disclosure are switchable with each other, that is, when the high voltage tank 100 outputs a power signal to an external device, the voltage input terminal of the high voltage tank 100 receives a power signal provided by the battery pack BP in the battery and outputs a corresponding power signal through the voltage output terminal, and when the high voltage tank 100 receives a power signal provided by the external power device, the high voltage tank 100 receives the power signal through its voltage output terminal and transmits the power signal to the battery pack BP through the voltage input terminal to charge the battery pack BP.

The controllable switch disclosed by the disclosure is a switch element which is provided with a control end, receives a control signal through the control end and can be turned on or turned off in response to the control signal. The control end of the controllable switch can be connected with a battery management system BMS, and the battery management system BMS outputs corresponding control signals to control the on-off of the controllable switch. The power supply circuit may include a dc charging circuit, and the control end of the second controllable switch K2 may be connected to a battery management system BMS of the battery system, so that, after the battery management system BMS monitors that the charging pile finishes charging the battery system, the battery management system BMS may output a turn-off signal to the second controllable switch K2 in the dc charging circuit to disconnect the dc charging circuit and end charging. Or after receiving the handshake signal sent by the charging pile, the battery management system BMS outputs an opening signal to the second controllable switch K2 to conduct the second controllable switch K2, and the charging pile can charge the battery system through the direct current charging circuit. In an exemplary embodiment, the controllable switch may be at least one of a relay, a contactor, and a semiconductor switch, where the semiconductor switch may be a MOS transistor switch, a thyristor switch, or the like, for example.

The power supply circuit according to the present disclosure may be understood as a power output line integrated in the high voltage tank 100 to provide the battery system with power signals of different uses, in other words, the high voltage tank 100 provides the battery system with power signals of different uses through the power supply line. For example, the power supply circuit may include a heating circuit, and the high-voltage box 100 may output a power signal to a heating device disposed in the battery box through the heating circuit so that the heating device generates heat to heat the battery cell.

It should be noted that, the present disclosure may integrate a power supply circuit that outputs a power signal to ensure the normal operation of the battery system into the high voltage box 100, and dispose other power supply circuits that are not directly used for the battery system outside the high voltage box 100 and uniformly output the power signal from the voltage output end (including the second output end XSA and the first output end XSB) of the high voltage box 100. For example, when the battery system is applied to a vehicle, a power supply circuit (such as a heating circuit, a water cooling circuit, a dc charging circuit, etc.) for ensuring the normal operation of the battery system may be integrated in the high voltage box 100 and managed by the battery management system BMS, while a power supply circuit for outputting a power signal to other devices (such as an air conditioner, a motor, etc.) of the vehicle is provided outside the high voltage box 100, and a power signal is outputted from a voltage output terminal of the high voltage box 100 to supply power thereto. Of course, it should be understood that the power supply circuits provided in the high-voltage tank 100 may be adjusted according to the needs of the user, and the specific application and the number of each power supply circuit in the high-voltage tank 100 are not particularly limited herein.

The positive electrode end of the power supply circuit is connected with the second output end XSA of the high-voltage box 100 through a second controllable switch K2, namely the second controllable switch K2 is connected in series between the positive electrode end of the power supply circuit and the high-voltage end of the high-voltage box 100, and when the second controllable switch K2 is conducted, the positive electrode end of the power supply circuit is electrified; when the second controllable switch K2 is turned off, the positive electrode end of the power supply circuit is powered off. The on-off state of the positive terminal of the power supply circuit and the high voltage terminal of the high voltage box 100 can be actively controlled through the second controllable switch K2.

The negative electrode end of the power supply circuit is connected in series between the first controllable switch K1 and the first output end XSB of the high-voltage box 100, namely, the negative electrode end of the power supply circuit is not additionally provided with a switching device but shares the total negative switch of the high-voltage box 100, and the total negative switch of the high-voltage box 100 is shared, so that the number of controllable switches and the number of wires in the high-voltage box 100 can be reduced, the wires in the high-voltage box 100 are simpler, and the size and the weight of the high-voltage box 100 are reduced; on the other hand, the power supply loop is ensured to still have two switching devices, and the reliability of the power supply circuit is ensured. It can be appreciated that the circuit described in the present disclosure refers to a closed loop circuit formed by connecting the positive terminal and the negative terminal of the power supply circuit via a load.

Fig. 2 is a schematic structural view of a battery system according to an embodiment of the present disclosure, and as shown in fig. 1 and 2, in an exemplary embodiment, the battery system may further include at least one battery pack BP, a positive electrode of the battery pack BP being connected to the second input terminal XS1 of the high voltage tank 100, and a negative electrode of the battery pack BP being connected to the first input terminal XS2 of the high voltage tank 100. The battery pack BP may be used to provide a power signal, where an anode of the battery pack BP is connected to the second input XS1 of the high voltage tank 100, and a cathode of the battery pack BP is connected to the first input XS2 of the high voltage tank 100, so that the provided power signal is transmitted to the high voltage tank 100, and the high voltage tank 100 performs unified dispatching and distribution of power.

The structure of the power supply circuit of the high voltage tank 100 is further described below.

As shown in fig. 1, in an exemplary embodiment, the power supply circuit in the high voltage tank 100 may include a direct current charging circuit. The positive terminal XSC of the dc charging circuit is connected to the second output terminal XSA of the high voltage tank 100 through a second controllable switch K2, and the negative terminal XSD of the dc charging circuit is connected in series between the first controllable switch K1 and the first output terminal XSB of the high voltage tank 100. The dc charging circuit may be used to connect an external charging device to charge the battery pack BP in the battery system through the external charging device. For example, when the battery system is applied to a vehicle, the direct current charging circuit may be connected to a charging post, and the charging post charges the battery pack BP in the battery system via the direct current charging circuit.

In this exemplary embodiment, the positive terminal XSC of the dc charging circuit is connected to the second output terminal XSA of the high voltage tank 100 through a second controllable switch K2, that is, a second controllable switch K2 is disposed on the positive branch of the dc charging circuit to control the on/off of the branch independently. The negative electrode end XSD of the dc charging circuit is connected in series between the first controllable switch K1 and the first output end XSB of the high voltage tank 100, i.e. the negative electrode branch of the dc charging circuit is not provided with a switching device alone, but shares the total negative switch of the high voltage tank 100, thereby saving the number of the switching elements in the high voltage tank 100, reducing the number of wires, enabling the wires of the high voltage tank 100 to be more concise, reducing the volume and weight of the high voltage tank 100, and being beneficial to saving the cost. For example, the high-voltage tank 100 may generally include two dc charging circuits, and compared to a conventional high-voltage tank 100 in which a relay is also provided in a negative branch of the dc charging circuit, the high-voltage tank 100 of the present disclosure can save two negative relays only in the dc charging circuit, which has a great cost advantage.

In addition, compared with the high-voltage box 100 in which the switching element is also arranged on the negative pole branch of the direct-current charging circuit, the high-voltage box 100 disclosed by the disclosure can meet the use requirement only by arranging the controllable switch on the positive pole branch of the direct-current charging circuit, and achieves the purpose of controlling the on and off of the charging circuit. In an embodiment of the disclosure, the second controllable switch K2 is a relay, the direct current charging circuit can only meet 1000 times of load cut-off capability under the condition of Un & In by using a single charging relay (no polarity) In the positive pole branch, and meet 12 ten thousand times of load cut-off service life under the condition of Un &10% In, and complete temperature rise test (rated current), temperature cycle-electric service life verification and high temperature durability-electric service life test, and the single relay performance is enough to support the application requirement of the charging circuit, so that the whole vehicle working condition requirement can be met. In addition, the present disclosure further improves the operational reliability of the dc charging circuit, and the negative electrode XSD of the dc charging circuit shares the total negative switch of the high voltage box 100, so that the dc charging circuit still has two switch elements to control on-off of the dc charging circuit, thereby further ensuring the operational reliability of the dc charging circuit.

It should be understood that the positive branch of a certain circuit described in this disclosure may be understood as a connection line where the positive terminal of the circuit is connected to the second output terminal XSA of the high voltage tank 100, and the negative branch may be understood as a connection line where the negative terminal of the circuit is connected to the first output terminal XSB of the high voltage tank 100.

As shown in fig. 1, in an exemplary embodiment, the power supply circuit in the high voltage tank 100 may further include a heating circuit, where a positive terminal XS3 of the heating circuit is connected to the second output terminal XSA of the high voltage tank 100 through a corresponding second controllable switch K2, and a negative terminal XS4 of the heating circuit is connected in series between the first controllable switch K1 and the first output terminal XSB of the high voltage tank 100. In the battery pack BP of the battery system, a heating device is generally provided to heat the battery core, and the heating circuit in the disclosure is a power supply line connected with the heating device to provide a power signal for the heating device. In this exemplary embodiment, the positive electrode XS3 of the heating circuit is connected to the second output XSA of the high voltage tank 100 through a corresponding second controllable switch K2, that is, the positive electrode branch of the heating circuit is provided with a second controllable switch K2 to independently control the on/off of the branch. The negative electrode XS4 of the heating circuit is connected in series between the first controllable switch K1 and the first output XSB of the high-voltage tank 100, i.e. the negative electrode branch of the heating circuit is not provided with a switching device alone, but shares the total negative switch of the high-voltage tank 100.

As an example, in an embodiment of the present disclosure, the second controllable switch K2 In the heating circuit is a relay, and the heating circuit uses only a single heating relay to meet the 2-ten-thousand load cut-off capability under the Un & In condition, and complete the electrical performance test such as the temperature rise test (under the rated current), and the single relay performance is enough to support the application requirement of the charging circuit, so as to meet the working condition requirement of the whole vehicle.

In addition, the negative electrode end XS4 of the heating circuit disclosed by the disclosure shares the total negative switch of the high-voltage box 100, so that the heating circuit is also provided with two switch pieces to control the on-off of the heating circuit, and the operation reliability of the heating circuit is further ensured.

As shown in fig. 1, in an exemplary embodiment, the power supply circuit in the high voltage tank 100 may further include a water cooling circuit, wherein a positive terminal XS10 of the water cooling circuit is connected to the second output terminal XSA of the high voltage tank 100 through a corresponding second controllable switch K2, and a negative terminal XS9 of the water cooling circuit is connected in series between the first controllable switch K1 and the first output terminal XSB of the high voltage tank 100. A water cooling device is generally further disposed in the battery pack BP of the battery system to cool the battery pack BP. The water cooling circuit is a power supply circuit which is connected with the water cooling device and provides power signals for the water cooling device. The positive electrode XS10 of the water-cooling circuit is connected to the second output XSA of the high voltage tank 100 through a corresponding second controllable switch K2, i.e. a second controllable switch K2 is arranged on the positive electrode branch of the water-cooling circuit to independently control the branch. The negative pole XS9 of the water-cooling circuit is connected in series between the first controllable switch K1 and the first output XSB of the high-voltage tank 100, i.e. the negative pole branch of the water-cooling circuit is not provided with a switching device independently, but shares the total negative switch of the high-voltage tank 100, thereby further reducing the number of switching elements and the number of wires of the high-voltage tank 100, being beneficial to further reducing the volume and the weight of the high-voltage tank 100 and further saving the cost. And the negative electrode end XS9 of the water-cooling circuit still has two switch pieces for controlling the on-off of the water-cooling circuit by sharing the total negative switch of the high-voltage box 100, thereby further ensuring the operation reliability of the water-cooling circuit.

It should be understood that the types of the second controllable switches K2 in the dc charging circuit, the heating circuit, and the water cooling circuit of the present disclosure may be the same or may be different, and are not particularly limited herein.

As shown in fig. 2, in an exemplary embodiment, the number of battery packs BP may be equal to or greater than 2, that is, the battery system may include two or more battery packs BP, where the number of second input terminals XS1 and the number of first input terminals XS2 of the high-voltage tank 100 correspond to the number of battery packs BP one by one, that is, the positive electrode and the negative electrode of one battery pack BP are connected to one set of second input terminals XS1 and first input terminals XS2, respectively. Of course, in other embodiments of the present disclosure, the number of battery packs BP may be 1, that is, the battery system includes only one battery pack BP, and the present disclosure does not specifically limit the number of battery packs BP.

As shown in fig. 2, in an exemplary embodiment, when the battery system includes two or more battery packs BP, the second input terminal XS1 of the high voltage tank 100 may be connected to the first sink device S1, the first input terminal XS2 of the high voltage tank 100 may be connected to the second sink device S2, that is, the high voltage power signals of the plurality of battery packs BP are converged by the first sink device S1 and then transmitted to the second output terminal XSA of the high voltage tank 100, and the high voltage power signals of the plurality of battery packs BP are converged by the second sink device S2 and then transmitted to the first output terminal XSB of the high voltage tank 100. The bus device of the present disclosure may be, for example, a bus bar, or simply a direct connection of a plurality of power lines to perform bus bar, or the like, and the specific structure of the bus device is not particularly limited herein.

On the basis, as shown in fig. 1, the first controllable switch K1 may be connected in series between the second current collector S2 and the first output XSB of the high voltage tank 100, that is, the high voltage tank 100 is connected to the first controllable switch K1 after collecting the low voltage power signals provided by the battery packs BP, so that the first controllable switch K1 may control whether the first output XSB of the high voltage tank 100 outputs the power signals. That is, when the first controllable switch K1 is turned on, the first output terminal XSB of the high voltage tank 100 is powered on, so that the power supply circuits can be supplied with the low voltage power signal, and when the first controllable switch K1 is turned off, the first output terminal XSB of the high voltage tank 100 is powered off to stop supplying the power supply circuits with the low voltage power signal.

Further, one end of the second controllable switch K2 is connected to the positive end of the corresponding power supply circuit, and the other end is connected in series between the first current collector S1 and the second output XSA of the high voltage box 100, so that the positive end of each power supply circuit is provided with the corresponding second controllable switch K2 to perform on-off control, that is, whether the high voltage box 100 provides high voltage power signals for each power supply circuit can be independently controlled, so that reliable operation of each power supply circuit is ensured, and system safety is improved.

As shown in fig. 2, in an exemplary embodiment, battery pack BP may include a plurality of battery boxes BB connected in series, and each battery box BB may include a plurality of battery modules connected in series. The battery system may further include a plurality of manual maintenance switches MSD, where the plurality of manual maintenance switches MSD are disposed in one-to-one correspondence with the plurality of battery boxes BB, and each of the manual maintenance switches MSD is connected in series to a connection loop of each of the battery modules, and at the same time, the second input end XS1 of the high voltage box 100 is directly connected to the second output end XSA of the high voltage box 100 through a wire. In other words, the battery system of the present disclosure is provided with the manual maintenance switch MSD only in each battery module circuit in the battery box BB, and the manual maintenance switch MSD is not provided in the high-voltage box 100 any more, i.e., the manual maintenance switch MSD in the high-voltage box 100, specifically, the manual maintenance switch MSD in the circuit connecting the second input terminal XS1 and the second output terminal XSA in the high-voltage box 100 is eliminated compared to the conventional high-voltage box 100. Because the manual maintenance switch MSD is already arranged in each battery module loop, namely each branch of the power supply system is already provided with insurance, redundant arrangement on the high-voltage box 100 is not needed at this time, the manual maintenance switch MSD in the high-voltage box 100 is cancelled, and the safety risk is avoided, so that the high-voltage box 100 is convenient to overhaul and maintain.

Specifically, the present disclosure does not lay out the manual service switch MSD in the high pressure tank 100, at least has the following advantages:

first, the cost is high, whether it is a lock bolt MSD or a quick disconnect MSD, so the high voltage tank 100 of the present disclosure does not have to be provided with a manual service switch MSD, which can significantly reduce the cost of the high voltage tank 100.

Second, it helps to reduce security risks. Specifically, the manual maintenance switch MSD is disposed in both the conventional high-voltage tank 100 and the battery pack BP, and when the entire vehicle maintenance is performed, a maintenance person may perform a maintenance operation when only the manual maintenance switch MSD of the high-voltage tank 100 is turned off, and at this time the manual maintenance switch MSD in the battery box BB is not turned off, which significantly increases the maintenance risk. In this application, because the high-voltage tank 100 is no longer configured with the manual maintenance switch MSD, a maintenance person can first disconnect the manual maintenance switch MSD in the battery box BB when performing maintenance operation, and there is no problem of misleading operation, thereby significantly reducing the safety risk of maintenance.

Furthermore, because not only safety exists in the manual maintenance switch MSD, but also an interlock configuration is required, some interlock harnesses need to be routed. The manual maintenance switch MSD is not configured in the high-voltage box 100, so that corresponding interlocking wire harnesses are not required to be laid, the wiring of the high-voltage box 100 is simpler, and the subsequent overhaul and maintenance difficulty is reduced to a certain extent.

As shown in fig. 1, in an exemplary embodiment, the battery system of the present disclosure may further include a battery management system BMS connected to the control terminal of the first controllable switch K1 and the control terminal of the second controllable switch K2, respectively, and operable to control the first controllable switch K1 and/or the second controllable switch K2 to be turned off in response to a preset signal. For example, a control program is preconfigured in the BMS, and when the high voltage box 100 is in emergency, the BMS can automatically control the corresponding controllable switch to open and close, so as to ensure the safe operation of the high voltage box 100. Of course, it should be understood that the battery management system BMS also has other control functions, which are not developed in detail herein.

As shown in fig. 1, in an exemplary embodiment, the battery system may further include a shunt DIVT, specifically, the shunt DIVT is connected in series between the second junction device and the first controllable switch K1, that is, the shunt DIVT and the first controllable switch K1 are sequentially connected after the high voltage box 100 receives the voltage power signals of the respective battery packs and performs junction. The shunt DIVT has a preset resistance value, and the two ends of the shunt DIVT can be connected with the battery management system BMS, so that the battery management system BMS can monitor the current of the shunt DIVT in real time according to the voltage signals at the two ends of the shunt DIVT and the resistance value of the shunt DIVT, namely, the battery management system BMS can monitor the current of the total negative branch of the high-voltage box 100.

In an exemplary embodiment, the battery system may further include a plurality of fuses, and in particular, the battery system may include a first fuse F1 and a second fuse F2, the first fuse F1 being connected in series between the second controllable switch K2 in the heating circuit and the second output XSA of the high voltage tank 100; the second fuse F2 is connected in series between the second controllable switch K2 in the water-cooling circuit and the second output XSA of the high voltage tank 100. The first fuse F1 is connected in series between the second controllable switch K2 in the heating circuit and the second output end XSA of the high voltage tank 100, and when the current of the heating circuit is too large, the first fuse F1 fuses to break the heating circuit, thereby protecting the electrical equipment in the heating circuit.

Similarly, the second fuse F2 may protect electrical equipment in the water cooled circuit, which is not described in detail herein.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. The battery system is characterized by comprising a high-voltage box, wherein the high-voltage box comprises a first input end, a first output end, a second input end and a second output end, the first input end is connected with the first output end through a first controllable switch, and the second input end is connected with the second output end; the high pressure tank further includes:

the positive end of the power supply circuit is connected with the second output end of the high-voltage box through a second controllable switch, and the negative end of the power supply circuit is connected between the first controllable switch and the first output end of the high-voltage box in series.

2. The battery system of claim 1, wherein the at least one power supply circuit comprises:

the positive end of the direct current charging circuit is connected with the second output end of the high-voltage box through the corresponding second controllable switch, and the negative end of the direct current charging circuit is connected between the first controllable switch and the first output end of the high-voltage box in series; and/or the number of the groups of groups,

the positive end of the heating circuit is connected with the second output end of the high-voltage box through the corresponding second controllable switch, and the negative end of the heating circuit is connected between the first controllable switch and the first output end of the high-voltage box in series; and/or the number of the groups of groups,

and the positive end of the water-cooling circuit is connected with the second output end of the high-voltage box through the corresponding second controllable switch, and the negative end of the water-cooling circuit is connected between the first controllable switch and the first output end of the high-voltage box in series.

3. The battery system of claim 1, wherein the first controllable switch and the second controllable switch each comprise at least one of a relay, a contactor, and a semiconductor switch.

4. The battery system of claim 1, wherein the battery system further comprises:

and the positive electrode of the battery pack is connected with the second input end of the high-voltage box, and the negative electrode of the battery pack is connected with the first input end of the high-voltage box.

5. The battery system of claim 4, wherein the battery pack comprises a plurality of battery boxes connected in series, the battery boxes comprising a plurality of battery modules connected in series; the battery system further includes:

the manual maintenance switches are arranged in one-to-one correspondence with the battery boxes, and are connected in series with the connecting loops of the battery modules in the corresponding battery boxes;

the second input end of the high-voltage box is directly connected with the second output end of the high-voltage box through a wire.

6. The battery system according to claim 4, wherein the number of the battery packs is 2 or more, and the number of the second input terminals and the first input terminals of the high-voltage tank are each in one-to-one correspondence with the number of the battery packs;

each second input end of the high-voltage box is connected with a first converging device, and each first input end of the high-voltage box is connected with a second converging device.

7. The battery system of claim 6, wherein the first controllable switch is connected in series between the second junction device and the first output of the high voltage tank;

one end of the second controllable switch is connected with the positive electrode end corresponding to the power supply circuit, and the other end of the second controllable switch is connected between the first confluence device and the second output end of the high-voltage box in series.

8. The battery system of claim 1, wherein the battery system further comprises:

the battery management system is connected with the control end of the first controllable switch and the control end of the second controllable switch respectively, and is used for responding to a preset signal to control the first controllable switch and/or the second controllable switch to be turned on or off.

9. The battery system of claim 6, wherein the battery system further comprises:

and the shunt is connected in series between the second confluence device and the first controllable switch.

10. The battery system of claim 2, wherein the battery system further comprises:

the first fuse is connected in series between a second controllable switch in the heating circuit and a second output end of the high-voltage box;

and the second fuse is connected in series between a second controllable switch in the water cooling circuit and a second output end of the high-voltage box.

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