Switchable resistor network, circuit, system, method, device, medium, product, and vehicle

Abstract

A switchable resistor network (21), a circuit, a system, a method, a device, a medium, a product, and a vehicle. The switchable resistor network (21) comprises a resistor network (211) and a switch assembly (212); a first end of the resistor network (211) is connected to a positive electrode of a battery (1), a second end of the resistor network (211) is connected to a capacitive load (C1), and a third end of the resistor network (211) is connected to a negative electrode of the battery (1); and the switch assembly (212) is connected to the resistor network (211), and is used for controlling connection and disconnection between the resistor network (211) and the battery (1) and / or the capacitive load (C1). By reusing the switchable resistor network (21), the switchable resistor network (21) cooperates with the battery (1) and / or the capacitive load (C1) to form a pre-charge circuit, a heating circuit, and a discharge circuit, thereby reducing the complexity and size of the battery control circuit (2) and reducing costs.

Description

Switchable resistance network, circuit, system, method, apparatus, medium, product, and vehicle

[0001] Cross-reference to related disclosures

[0002] The present disclosure claims priority to the Chinese patent publication No. 202411084110.0, filed on August 08, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of battery, and in particular, to a switchable resistance network, circuit, system, method, apparatus, medium, product, and vehicle. BACKGROUND

[0004] With the popularity of electric vehicles, people's requirements for the performance and safety of electric vehicles are also getting higher and higher. In order to meet the above requirements, the existing battery system of electric vehicles generally has a pre-charging circuit and a heating circuit. The pre-charging circuit is used to pre-charge the load capacitor, so as to avoid the damage of the main positive and main negative relays due to excessive short-circuit current and overheating adhesion. The heating circuit is used to generate heat energy when the electric vehicle is used in cold seasons or regions, so as to effectively improve the charging and discharging performance and service life of the battery. TECHNICAL PROBLEM

[0005] However, the existing battery system structure is complex, which is not conducive to the lightweight of the battery system and has a high cost. TECHNICAL SOLUTION

[0006] The present disclosure provides a switchable resistance network, circuit, system, method, apparatus, medium, product, and vehicle to solve the problem of the existing battery system structure being complex, which is not conducive to the lightweight of the battery system and has a high cost.

[0007] A switchable resistance network, comprising:

[0008] a resistance network, a first end of the resistance network being used for connecting a positive electrode of a battery, a second end of the resistance network being used for connecting a capacitive load, and a third end of the resistance network being used for connecting a negative electrode of the battery;

[0009] a switch assembly connected with the resistance network, used for controlling the on-off of the resistance network and the battery and / or the capacitive load.

[0010] Optionally, the switch assembly comprises a first switch circuit and a second switch circuit.

[0011] a first end of the first switch circuit being connected with the second end of the resistance network, and a second end of the first switch circuit being coupled to the negative electrode of the battery and a first end of the capacitive load.

[0012] The first end of the second switch circuit is connected to the third end of the resistance network, and the second end of the second switch circuit is connected to the second end of the capacitive load.

[0013] Optionally, when the first switch circuit is turned on, the resistance network is configured to form a heating loop with the battery.

[0014] When the second switch circuit is turned on, the resistance network is configured to form a pre-charging loop with the battery and the capacitive load.

[0015] When both the first switch circuit and the second switch circuit are turned on, the resistance network is configured to form a discharging loop with the capacitive load.

[0016] Optionally, the resistance network comprises a first resistance circuit and a second resistance circuit.

[0017] The first resistance circuit and the second resistance circuit are arranged in series between the positive electrode of the battery and the first end of the first switch circuit.

[0018] A connection node between the first resistance circuit and the second resistance circuit is connected to the first end of the second switch circuit.

[0019] Optionally, the first resistance circuit comprises a first resistance and a third switch circuit.

[0020] The first resistance is connected in series or parallel with the third switch circuit.

[0021] Optionally, there are a plurality of first resistances, and the plurality of first resistances are connected in series and / or parallel.

[0022] Optionally, the first resistance circuit further comprises a second resistance and a fourth switch circuit.

[0023] The second resistance is connected in parallel with the first resistance, and the fourth switch circuit is connected in parallel or in series with the second resistance.

[0024] Alternatively, the second resistance is connected in series with the first resistance, and the fourth switch circuit is connected in parallel or in series with the second resistance.

[0025] Optionally, the second resistance circuit comprises a third resistance and a fifth switch circuit.

[0026] The third resistance is connected in series or parallel with the fifth switch circuit.

[0027] Optionally, there are a plurality of third resistances, and the plurality of third resistances are connected in series and / or parallel.

[0028] Optionally, the second resistance circuit further comprises a fourth resistance and a sixth switch circuit;

[0029] The fourth resistance is in parallel with the third resistance, and the sixth switch circuit is in parallel or in series with the fourth resistance.

[0030] Alternatively, the fourth resistance is in series with the third resistance, and the sixth switch circuit is in parallel or in series with the fourth resistance.

[0031] A battery control circuit comprising the above switchable resistance network.

[0032] Optionally, the battery control circuit further comprises a capacitive load.

[0033] A first end of the capacitive load is connected to a third end of the resistance network through the switch assembly, and a second end of the capacitive load is connected to a second end of the resistance network through the switch assembly.

[0034] A battery system comprising a battery and the above battery control circuit.

[0035] Optionally, a positive electrode of the battery is connected to a first end of the resistance network and a second end of the capacitive load.

[0036] A negative electrode of the battery is connected to the switch assembly and a first end of the capacitive load.

[0037] Optionally, the battery system further comprises a first contactor.

[0038] A first end of the first contactor is connected to a positive electrode of the battery and a first end of the resistance network, and a second end of the first contactor is connected to the switch assembly and a second end of the capacitive load.

[0039] Optionally, the battery system further comprises a second contactor.

[0040] A first end of the second contactor is connected to a negative electrode of the battery, and a second end of the second contactor is connected to the switch assembly and a first end of the capacitive load.

[0041] Optionally, the battery system further comprises a heating fuse.

[0042] A first end of the heating fuse is connected to the switch assembly, and a second end of the heating fuse is coupled to a negative electrode of the battery.

[0043] Optionally, the battery system further comprises a current detection device.

[0044] One end of the current detection device is coupled to the switch assembly, and the other end of the current detection device is coupled to a negative electrode of the battery.

[0045] A charging and discharging control method, applicable to the battery system, comprising:

[0046] receiving a charging and discharging control signal, the charging and discharging control signal comprising a control type;

[0047] when the control type is a first type, controlling the switch assembly to work in a first working state, so that the resistance network cooperates with the battery to form a heating loop;

[0048] when the control type is a second type, controlling the switch assembly to work in a second working state, so that the resistance network cooperates with the battery and the capacitive load to form a pre-charging loop;

[0049] when the control type is a third type, controlling the switch assembly to work in a third working state, so that the resistance network cooperates with the capacitive load to form a discharging loop.

[0050] A control device, comprising a memory, a processor, and a logic control program stored in the memory and executable on the processor, the processor executing the logic control program to implement the charging and discharging control method.

[0051] A computer-readable storage medium storing a computer program, the computer program being executed by a processor to implement the charging and discharging control method.

[0052] A computer program product comprising a computer program, the computer program being executed by a processor to implement the charging and discharging control method.

[0053] A vehicle comprising the battery system. Advantages

[0054] The above switchable resistance network, circuit, system, method, device, medium, product and vehicle, the switchable resistance network comprising a resistance network and a switch assembly. By connecting the first end of the resistance network to the positive electrode of the battery, the second end of the resistance network to the capacitive load, and the third end of the resistance network to the negative electrode of the battery, and connecting the switch assembly to the resistance network to control the on-off of the resistance network and the battery and / or the capacitive load, the switchable resistance network can be multiplexed by controlling the on-off of the resistance network and the battery and / or the capacitive load, so that the switchable resistance network cooperates with the battery and / or the capacitive load to form a pre-charging loop, a heating loop and a discharging loop, reducing the complexity and size of the battery control circuit and reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present disclosure. Obviously, the drawings in the following description only some of the embodiments of the present disclosure, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative labor should be within the protection scope of the present disclosure.

[0056] FIG. 1 is a circuit schematic diagram of a switchable resistance network in an embodiment of the present disclosure;

[0057] FIG. 2 is a circuit schematic diagram of a first resistance circuit in an embodiment of the present disclosure;

[0058] FIG. 3 is another circuit schematic diagram of the first resistance circuit in an embodiment of the present disclosure;

[0059] FIG. 4 is a circuit schematic diagram of a second resistance circuit in an embodiment of the present disclosure;

[0060] FIG. 5 is another circuit schematic diagram of the second resistance circuit in an embodiment of the present disclosure;

[0061] FIG. 6 is a flow chart of a charge and discharge control method in an embodiment of the present disclosure;

[0062] FIG. 7 is a schematic diagram of a control device in an embodiment of the present disclosure.

[0063] In the drawings: 1, battery; 2, battery control circuit; 21, switchable resistance network; 211, resistance network; 21A, first resistance circuit; 21A1, third switch circuit; 21A2, fourth switch circuit; 21B, second resistance circuit; 21B1, fifth switch circuit; 21B2, sixth switch circuit; 212, switch assembly; 2121, first switch circuit; 2122, second switch circuit.

[0064] Embodiments of the present disclosure

[0065] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor should be within the protection scope of the present disclosure.

[0066] It should be understood that the present disclosure can be implemented in different forms and should not be interpreted as being limited to the embodiments presented herein. On the contrary, these embodiments are provided to make the disclosure complete and fully, and to fully convey the scope of the present disclosure to those skilled in the art. In the drawings, the sizes and relative sizes of layers and regions can be exaggerated for clarity throughout the drawings. The same reference numbers represent the same elements throughout the drawings.

[0067] It will be understood that when an element or layer is referred to as being "on", "adjacent", "connected" or "coupled" to another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected", or "directly coupled" to another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present disclosure.

[0068] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0069] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0070] For a thorough understanding of the present disclosure, reference should be made to the following detailed description, in conjunction with the accompanying drawings, in which:

[0071] The embodiment provides a switchable resistance network 21, which can be applied in a battery control circuit 2 as shown in FIG. 1. The battery control circuit 2 includes a capacitive load C1 and the switchable resistance network 21. The switchable resistance network 21 is arranged between the battery 1 and the capacitive load C1, and is used to form a pre-charging circuit, a heating circuit and a discharging circuit in cooperation with the battery 1 and the capacitive load C1, so that the pre-charging circuit, the heating circuit and the discharging circuit can be realized by multiplexing the switchable resistance network 21, and the complexity and volume of the battery control circuit 2 are reduced, and the cost is reduced.

[0072] As an example, the battery control circuit 2 can be applied in a battery system. The battery system includes the battery 1 and the battery control circuit 2. Preferably, the battery system is a battery system on a vehicle. The battery 1 is a power battery of the vehicle.

[0073] The embodiment provides a switchable resistance network 21, which includes a resistance network 211 and a switch assembly 212. A first end of the resistance network 211 is used to connect a positive electrode Bat+ of the battery 1, a second end of the resistance network 211 is used to connect the capacitive load C1, and a third end of the resistance network 211 is used to connect a negative electrode Bat- of the battery 1. The switch assembly 212 is connected with the resistance network 211, and is used to control the on-off of the resistance network 211 and the battery and / or the capacitive load C1.

[0074] In the embodiment, the on-off of the resistance network 211 and the battery and / or the capacitive load C1 is controlled, and then the switchable resistance network 21 is multiplexed, so that the switchable resistance network 21 forms the pre-charging circuit, the heating circuit and the discharging circuit in cooperation with the battery 1 and / or the capacitive load C1, the complexity and volume of the battery control circuit 2 are reduced, and the cost is reduced.

[0075] The capacitive load C1 is a bus capacitor.

[0076] In an embodiment, the switch assembly 212 includes a first switch circuit 2121 and a second switch circuit 2122.

[0077] As an example, the first end of the resistance network 211 is used to connect the positive electrode Bat+ of the battery 1, and the second end of the resistance network 211 is connected with the first end of the first switch circuit 2121. The third end of the resistance network 211 is connected with the first end of the second switch circuit 2122. The second end of the first switch circuit 2121 is coupled to the negative electrode Bat- of the battery 1 and the first end of the capacitive load C1. The second end of the second switch circuit 2122 is connected with the second end of the capacitive load C1.

[0078] In the embodiment, by connecting the first end of the resistance network 211 to the positive pole Bat+ of the battery 1, connecting the second end of the resistance network 211 to the first end of the first switch circuit 2121, connecting the third end of the resistance network 211 to the first end of the second switch circuit 2122, coupling the second end of the first switch circuit 2121 to the negative pole Bat- of the battery 1 and the first end of the capacitive load C1, and connecting the second end of the second switch circuit 2122 to the second end of the capacitive load C1, the first switch circuit 2121 and / or the second switch circuit 2122 can be controlled to be turned on or turned off, thereby multiplexing the switchable resistance network 21, so that the switchable resistance network 21 cooperates with the battery 1 and / or the capacitive load C1 to form a pre-charging circuit, a heating circuit and a discharging circuit, reducing the complexity and volume of the battery control circuit 2 and reducing the cost.

[0079] Optionally, the resistance values of the resistance network 211 can be selected according to actual experience or requirements to adapt to the capacitive pre-charging time, heating temperature and capacitive discharging time in different application scenarios.

[0080] Optionally, the first switch circuit 2121 and the second switch circuit 2122 can include contactors, relays or switch tubes. As a preferred embodiment, when the battery system is applied in a vehicle, the first switch circuit 2121 includes a first contactor and the second switch circuit 2122 includes a second contactor.

[0081] In an embodiment, when the first switch circuit 2121 is turned on, the resistance network 211 is used to cooperate with the battery 1 to form a heating circuit; when the second switch circuit 2122 is turned on, the resistance network 211 is used to cooperate with the battery 1 and the capacitive load C1 to form a pre-charging circuit; and when the first switch circuit 2121 and the second switch circuit 2122 are both turned on, the resistance network 211 is also used to cooperate with the capacitive load C1 to form a discharging circuit.

[0082] As an example, in an application scenario, when the battery system is applied in a vehicle, the battery system further includes a main positive contactor K1 and a main negative contactor K2; the first end of the main positive contactor K1 is connected to the positive pole Bat+ of the battery 1 and the first end of the resistance network 211; the second end of the main positive contactor K1 is connected to the second end of the second switch circuit 2122 and the second end of the capacitive load C1; the first end of the main negative contactor K2 is connected to the negative pole Bat- of the battery 1, and the second end of the main negative contactor K2 is connected to the second end of the first switch circuit 2121 and the first end of the capacitive load C1.

[0083] As an example, when the on-board controller in the vehicle detects that the vehicle is powered on, the control main positive contactor K1 is turned off, the main negative contactor K2 is turned on, and the control second switch circuit 2122 is turned on, so that when the second switch circuit 2122 is turned on, the resistance network 211 cooperates with the battery 1 and the capacitive load C1 to form a pre-charging loop.

[0084] As another example, when the on-board controller in the vehicle detects that the temperature of the battery 1 is too low, the control first switch circuit 2121 is turned on, so that the resistance network 211 cooperates with the battery 1 to form a heating loop, and heat is generated through the resistance network 211 to warm up the battery 1. It should be noted that when the resistance network 211 cooperates with the battery 1 to form a heating loop, the vehicle can be in a process of pre-charging the capacitive load C1, for example, at this time the main positive contactor K1 is turned off, the main negative contactor K2 is turned on, and the second switch circuit 2122 is turned on; the vehicle can also be in a normal discharging process of the battery 1, for example, at this time the main positive contactor K1 is turned on, the main negative contactor K2 is turned on, and the second switch circuit 2122 is turned off. That is, the resistance network 211 can cooperate with the battery 1 to form a heating loop, and cooperate with the battery 1 and the capacitive load C1 to form a pre-charging loop.

[0085] As another example, when the on-board controller in the vehicle detects that the vehicle is powered off, the control main positive contactor K1 is turned off, the main negative contactor K2 is turned off, and the control first switch circuit 2121 and the control second switch circuit 2122 are turned on, so that when the first switch circuit 2121 and the second switch circuit 2122 are turned on, the resistance network 211 cooperates with the capacitive load C1 to form a discharging loop, and the energy stored in the capacitive load C1 is consumed by the resistance network 211.

[0086] In this embodiment, by turning on the first switch circuit 2121 and turning on the main negative contactor K2, the resistance network 211 is used to cooperate with the battery 1 to form a heating loop; by turning on the second switch circuit 2122 and turning on the main negative contactor K2, the resistance network 211 is used to cooperate with the battery 1 and the capacitive load C1 to form a pre-charging loop; and by turning on the first switch circuit 2121 and the second switch circuit 2122, the resistance network 211 is also used to cooperate with the capacitive load C1 to form a discharging loop, thereby realizing the multiplexing of the switchable resistance network 21, cooperating with the battery 1 and / or the capacitive load C1 to form a pre-charging loop, a heating loop and a discharging loop, reducing the complexity and volume of the battery control circuit 2, and reducing the cost.

[0087] In an embodiment, the resistance network 211 comprises a first resistance circuit 21A and a second resistance circuit 21B; the first resistance R1 and the second resistance circuit 21B are connected in series between the positive electrode Bat+ of the battery 1 and the first end of the first switch circuit 2121; the connection node between the first resistance R1 and the second resistance circuit 21B is connected to the first end of the second switch circuit 2122.

[0088] As an example, when the on-board controller in the vehicle detects that the vehicle is powered on, the main positive contactor K1 is controlled to be turned off, the main negative contactor K2 is controlled to be turned on, and the second switch circuit 2122 is controlled to be turned on, so that the first resistance circuit 21A forms a pre-charge circuit with the battery 1 and the capacitive load C1 when the second switch circuit 2122 is turned on.

[0089] As another example, when the on-board controller in the vehicle detects that the temperature of the battery 1 is too low, the first switch circuit 2121 is controlled to be turned on, so that the first resistance circuit 21A and the second resistance circuit 21B together form a heating circuit with the battery 1.

[0090] As another example, when the on-board controller in the vehicle detects that the vehicle is powered off, the main positive contactor K1 is controlled to be turned off, the main negative contactor K2 is controlled to be turned off, and the first switch circuit 2121 and the second switch circuit 2122 are controlled to be turned on, so that the second resistance circuit 21B forms a pre-charge circuit with the battery 1 and the capacitive load C1 when the first switch circuit 2121 and the second switch circuit 2122 are turned on, and the energy stored in the capacitive load C1 is consumed by the second resistance circuit 21B.

[0091] In the embodiment, by connecting the first resistance R1 and the second resistance circuit 21B in series between the positive electrode Bat+ of the battery 1 and the first end of the first switch circuit 2121, and connecting the connection node between the first resistance R1 and the second resistance circuit 21B to the first end of the second switch circuit 2122, a pre-charge circuit, a heating circuit and a discharge circuit are formed with the battery 1 and / or the capacitive load C1 by the first resistance circuit 21A, the second resistance circuit 21B, the first switch circuit 2121 and the second switch circuit 2122.

[0092] In an embodiment, the first resistance circuit 21A comprises a first resistance R1 and a third switch circuit 21A1; the first resistance R1 is connected in series or parallel with the third switch circuit 21A1.

[0093] Specifically, the first resistance R1 is connected in series or parallel between the first end and the second end of the first resistance circuit 21A.

[0094] As an example, the first resistor R1 is in series with the third switch circuit 21A1. When the on-board controller in the vehicle detects the power-on of the vehicle, the main negative contactor K2 is controlled to be on, the third switch circuit 21A1 is controlled to be on, and the second switch circuit 2122 is controlled to be on, so that the battery 1, the first resistor R1 and the capacitive load C1 form a pre-charge circuit. It should be noted that when the first resistor R1 is in parallel with other resistors in the first resistor circuit 21A, the first resistor R1 is disconnected from the first resistor circuit 21A by opening the third switch circuit 21A1, so as to adjust the overall resistance of the first resistor circuit 21A, thereby configuring the charging current or charging time of the pre-charge circuit. Further, there are multiple first resistors R1, and the multiple first resistors R1 are in series and / or in parallel. For example, the multiple first resistors R1 are in series with each other, or the multiple first resistors R1 are in parallel with each other; or, in the multiple first resistors R1, part of the first resistors R1 are in series, and the other part of the first resistors R1 are in parallel, and the part of the first resistors R1 in series and the other part of the first resistors R1 in parallel are in series with each other; or, in the multiple first resistors R1, part of the first resistors R1 are in series, and the other part of the first resistors R1 are in series, and the part of the first resistors R1 in series and the other part of the first resistors R1 in series are in parallel with each other. Among the multiple first resistors R1, part of the first resistors R1 can be in series or in parallel with a third switch circuit 21A1, or each first resistor R1 can be in series or in parallel with a third switch circuit 21A1. Thus, the overall resistance of the first resistor circuit 21A can be adjusted more flexibly.

[0095] As another example, as shown in FIG. 2, the first resistor R1 is in parallel with the third switch circuit 21A1. When the on-board controller in the vehicle detects the power-on of the vehicle, the main negative contactor K2 is controlled to be on, the third switch circuit 21A1 is controlled to be off, and the second switch circuit 2122 is controlled to be on, so that the battery 1, the first resistor R1 and the capacitive load C1 form a pre-charge circuit. It should be noted that when the third switch circuit 21A1 is on, the first resistor R1 can be bypassed, so that the second switch circuit 2122 can be used as a replacement element of the main positive contactor K1 when the main positive contactor K1 fails, to control the charging and discharging circuit of the battery 1 to be on or off.

[0096] In an embodiment, the first resistor circuit 21A further comprises a second resistor R2 and a fourth switch circuit 21A2; as shown in FIG. 3, the second resistor R2 is in parallel with the first resistor R1, and the fourth switch circuit 21A2 is in parallel or in series with the second resistor R2; or as shown in FIG. 2, the second resistor R2 is in series with the first resistor R1, and the fourth switch circuit 21A2 is in parallel or in series with the second resistor R2.

[0097] Among them, the resistance of the second resistor R2 and the first resistor R1 can be the same or different.

[0098] In the embodiment, the first resistance circuit 21A further comprises a second resistance R2 and a fourth switch circuit 21A2; the second resistance R2 is in parallel with the first resistance R1, and the fourth switch circuit 21A2 is in parallel or in series with the second resistance R2; or, the second resistance R2 is in series with the first resistance R1, and the fourth switch circuit 21A2 is in parallel or in series with the second resistance R2, so that by controlling the conduction and turn-off of the third switch circuit 21A1 and the fourth switch circuit 21A2, the resistance value presented by the first resistance circuit 21A is configured, which can be flexibly selected according to actual needs, and is not limited herein. It should be noted that the number of the second resistance R2 and the fourth switch circuit 21A2 can be selected according to actual conditions, and is not limited herein.

[0099] In an embodiment, the second resistance circuit 21B comprises a third resistance R3 and a fifth switch circuit 21B1; the third resistance R3 is in series or in parallel with the fifth switch circuit 21B1. As shown in FIG. 4, the third resistance R3 is in parallel with the fifth switch circuit 21B1.

[0100] As an example, after the third resistance R3 is connected in series with the first resistance circuit 21A, it can be connected in series with the fifth switch circuit 21B1 or in parallel with the fifth switch circuit 21B1, and the resistance value presented by the resistance network 211 can be selected by controlling the conduction and turn-off of the fifth switch circuit 21B1. Understandably, the specific resistance value of the second resistance circuit 21B can be reasonably configured according to the demand temperature of the heating loop or the discharge current or discharge time of the capacitance discharge circuit, and is not limited herein.

[0101] Further, the third resistance R3 is a plurality of third resistances R3, and the plurality of third resistances R3 are connected in series and / or in parallel. For example, the plurality of third resistances R3 are connected in series with each other, or the plurality of third resistances R3 are connected in parallel with each other; or, in the plurality of third resistances R3, part of the third resistances R3 are connected in series, and another part of the third resistances R3 are connected in parallel, and the part of the third resistances R3 connected in series are connected in series with the another part of the third resistances R3 connected in parallel; or, in the plurality of third resistances R3, part of the third resistances R3 are connected in series, and another part of the third resistances R3 are connected in series, and the part of the third resistances R3 connected in series are connected in parallel with the another part of the third resistances R3 connected in series. Among them, in the plurality of third resistances R3, part of the third resistances R3 can be connected in series or in parallel with a fifth switch circuit 21B1, or each third resistance R3 can be connected in series or in parallel with a fifth switch circuit 21B1. Thus, it is convenient to more flexibly adjust the overall resistance value of the second resistance circuit 21B.

[0102] In an embodiment, the second resistance circuit 21B further comprises a fourth resistance R4 and a sixth switch circuit 21B2; as shown in FIG. 5, the fourth resistance R4 is connected in parallel with the third resistance R3, and the sixth switch circuit 21B2 is connected in parallel or in series with the fourth resistance R4; or as shown in FIG. 4, the fourth resistance R4 is connected in series with the third resistance R3, and the sixth switch circuit 21B2 is connected in parallel or in series with the fourth resistance R4.

[0103] In an embodiment, the fourth resistance R4 and the third resistance R3 can have the same resistance value or different resistance values.

[0104] In an embodiment, the second resistance circuit 21B further comprises a fourth resistance R4 and a sixth switch circuit 21B2; as shown in FIG. 5, the fourth resistance R4 is connected in parallel with the third resistance R3, and the sixth switch circuit 21B2 is connected in parallel or in series with the fourth resistance R4; or as shown in FIG. 4, the fourth resistance R4 is connected in series with the third resistance R3, and the sixth switch circuit 21B2 is connected in parallel or in series with the fourth resistance R4.

[0105] In an embodiment, the battery control circuit 2 comprises the above-described switchable resistance network 21.

[0106] Further, the battery control circuit 2 further comprises a capacitive load C1. The capacitive load C1 is connected to the second end of the resistance network 211 in the switchable resistance network 21. As an example, the first end of the capacitive load C1 is connected to the third end of the resistance network 211 through the switch assembly 212, and the second end of the capacitive load C1 is connected to the second end of the resistance network 211 through the switch assembly 212.

[0107] Further, the capacitive load C1 is connected to the second end of the resistance network 211 through the second switch circuit 2122 in the switch assembly 212.

[0108] As an example, the second end of the capacitive load C1 is used to connect the positive electrode Bat+ of the battery 1 and is connected to the second end of the second switch circuit 2122; and the first end of the capacitive load C1 is used to connect the negative electrode Bat- of the battery 1 and is connected to the second end of the first switch circuit 2121.

[0109] As an example, when the battery control circuit 2 is applied in a battery system of a vehicle, the second end of the capacitive load C1 is used to connect the positive pole Bat+ of the battery 1 and is connected with the second end of the second switch circuit 2122; the first end of the capacitive load C1 is used to connect the negative pole Bat- of the battery 1 and is connected with the second end of the first switch circuit 2121. The vehicle on-board controller is connected with the first switch circuit 2121, the second switch circuit 2122 and the resistance network 211 in the switchable resistance network 21, and by controlling the resistance values of the first switch circuit 2121, the second switch circuit 2122 and the resistance network 211, the switchable resistance network 21 is multiplexed to cooperate with the battery 1 and / or the capacitive load C1 to form a pre-charging circuit, a heating circuit and a discharging circuit, the pre-charging circuit, the heating circuit and the discharging circuit do not conflict in working sequence and complementarily interfere, thereby reducing the complexity and volume of the battery control circuit 2 and reducing the cost.

[0110] The embodiment provides a battery system, which comprises the battery 1 and the battery control circuit 2 described above; the positive pole Bat+ of the battery 1 is connected with the second end of the capacitive load C1 and the first end of the resistance network 211; the negative pole Bat- of the battery 1 is connected with the first end of the capacitive load C1 and the second end of the first switch circuit 2121.

[0111] In an embodiment, the battery system further comprises a first contactor. Exemplarily, the first contactor is a main positive contactor K1. The first end of the main positive contactor K1 is connected with the positive pole of the battery 1 and the first end of the resistance network 211; the second end of the main positive contactor K1 is connected with the switch assembly 212 and the second end of the capacitive load C1.

[0112] Further, the battery system further comprises a second contactor. Exemplarily, the second contactor is a main negative contactor K2. The first end of the main negative contactor K2 is connected with the negative pole of the battery 1, and the second end of the main negative contactor K2 is connected with the switch assembly 212 and the first end of the capacitive load C1.

[0113] Exemplarily, the first end of the main positive contactor K1 is connected with the positive pole Bat+ of the battery 1 and the first end of the resistance network 211; the second end of the main positive contactor K1 is connected with the second end of the second switch circuit 2122 and the second end of the capacitive load C1; the first end of the main negative contactor K2 is connected with the negative pole Bat- of the battery 1, and the second end of the main negative contactor K2 is connected with the second end of the first switch circuit 2121.

[0114] As an example, when the vehicle is powered on, the on-board controller controls the main positive contactor K1 to be turned off, controls the main negative contactor K2 to be turned on, and controls the second switch circuit 2122 to be turned on, thereby forming a pre-charging circuit, and according to the cell temperature of the battery 1, judges whether to control the first switch circuit 2121 to be turned on, thereby forming a heating circuit.

[0115] As another example, when the vehicle is powered off, the vehicle controller controls the main positive contactor K1 to be open, controls the main negative contactor K2 to be open, and controls the first switch circuit 2121 and the second switch circuit 2122 to be simultaneously turned on, forming a discharging loop.

[0116] In the embodiment, the battery system comprises the battery 1 and the battery control circuit 2 described above; the positive electrode Bat+ of the battery 1 is connected with the second end of the capacitive load C1 and the first end of the resistance network 211; the negative electrode Bat- of the battery 1 is connected with the first end of the capacitive load C1 and the second end of the first switch circuit 2121, so that the battery system can reuse the switchable resistance network 21, and form a pre-charging loop, a heating loop and a discharging loop in cooperation with the battery 1 and / or the capacitive load C1, the working sequences of the pre-charging loop, the heating loop and the discharging loop are not conflicted and complementary interfered, so as to reduce the complexity and volume of the battery system and reduce the cost.

[0117] In an embodiment, as shown in FIG. 1, the battery system further comprises a heating fuse F1; the first end of the heating fuse F1 is connected with the second end of the first switch circuit 2121, and the second end of the heating fuse F1 is coupled to the negative electrode Bat- of the battery 1.

[0118] In the embodiment, the first end of the heating fuse F1 is connected with the second end of the first switch circuit 2121, and the second end of the heating fuse F1 is coupled to the negative electrode Bat- of the battery 1, so as to timely disconnect the heating loop through the heating fuse F1 when the temperature is too high, and improve the safety of the battery system.

[0119] In an embodiment, as shown in FIG. 1, the battery system further comprises a current detection device HVSU; one end of the current detection device HVSU is coupled to the second end of the first switch circuit 2121, and the other end of the current detection device HVSU is coupled to the negative electrode Bat- of the battery 1.

[0120] In the embodiment, one end of the current detection device HVSU is coupled to the second end of the first switch circuit 2121, and the other end of the current detection device HVSU is coupled to the negative electrode Bat- of the battery 1, so as to detect the pre-charging current in the pre-charging loop working process or the charging and discharging current in the charging and discharging process of the battery 1, so that the vehicle controller performs corresponding control operations according to the pre-charging current or the charging and discharging current. For example, the pre-charging loop is turned off when the pre-charging current is abnormal, and the charging and discharging loop is turned off when the charging and discharging current is abnormal, so as to improve the safety.

[0121] Further, the charging and discharging loop of the battery system is further provided with a main fuse F2.

[0122] The embodiment provides a charging and discharging control method, as shown in FIG. 6, which is applied to the above-mentioned battery system and comprises the following steps.

[0123] S601: receiving a charge-discharge control signal, the charge-discharge control signal comprising a control type.

[0124] S602: when the control type is a first type, controlling the switch assembly 212 to work in a first working state to make the resistance network 211 cooperate with the battery 1 to form a heating loop.

[0125] S603: when the control type is a second type, controlling the switch assembly 212 to work in a second working state to make the resistance network 211 cooperate with the battery 1 and the capacitive load Cl to form a pre-charging loop.

[0126] S604: when the control type is a third type, controlling the switch assembly 212 to work in a third working state to make the resistance network 211 cooperate with the capacitive load Cl to form a discharging loop.

[0127] The charge-discharge control method is applied in a control device, which can be a vehicle controller in a vehicle. The charge-discharge control signal is a signal for charge-discharge control. The control type is the type of the charge-discharge control signal. The control type can include a first type, a second type and a third type. The first type is used to control the battery 1 to heat, the second type is used to control the battery 1 to pre-charge, and the third type is used to control the battery 1 to discharge.

[0128] As an example, in step S601, a charge-discharge control signal is received, and the charge-discharge control signal comprises a control type. The charge-discharge control signal can be generated by other control modules in the vehicle according to vehicle data, or can be received through a human-computer interaction terminal. The vehicle data includes vehicle power-on data, vehicle power-off data and battery data. The battery data includes battery temperature. It can be understood that according to the battery data, a first type of charge-discharge control signal is generated to make the resistance network 211 cooperate with the battery 1 to form a heating loop when the battery 1 temperature is low, so as to heat the battery 1. According to the vehicle power-on data, a second type of charge-discharge control signal is generated to make the resistance network 211 cooperate with the battery 1 and the capacitive load Cl to form a pre-charging loop when the vehicle is powered on. According to the vehicle power-off data, a third type of charge-discharge control signal is generated to make the resistance network 211 cooperate with the capacitive load Cl to form a discharging loop when the vehicle is powered off.

[0129] As an example, in step S602, if the control type is a first type, the switch assembly 212 is controlled to work in a first working state to make the resistance network 211 cooperate with the battery 1 to form a heating loop. The first working state includes that the first switch circuit 2121 in the switch assembly 212 is turned on, and the resistance network 211 is facilitated to cooperate with the battery 1 to form a heating loop. It should be noted that the main negative contactor K2 in the battery system is turned on at this time.

[0130] As an example, in step S603, if the control type is the second type, the switch assembly 212 is controlled to work in the second working state, so that the resistance network 211 forms the pre-charging circuit with the battery 1 and the capacitive load Cl. The second working state includes that the second switch circuit 2122 in the switch assembly 212 is turned on, so that the resistance network 211 forms the pre-charging circuit with the battery 1 and the capacitive load Cl. It should be noted that at this time, the main positive contactor Kl in the battery system is turned off, and the main negative contactor K2 is turned on.

[0131] As an example, in step S604, if the control type is the third type, the switch assembly 212 is controlled to work in the third working state, so that the resistance network 211 forms the discharging circuit with the capacitive load Cl. The third working state includes that the first switch circuit 2121 and the second switch circuit 2122 in the switch assembly 212 are turned on, so that the resistance network 211 forms the discharging circuit with the capacitive load Cl. It should be noted that at this time, the main positive contactor Kl in the battery system is turned off, and the main negative contactor K2 is turned off.

[0132] In the embodiment, by receiving the charging and discharging control signal, the charging and discharging control signal includes the control type, if the control type is the first type, the switch assembly 212 is controlled to work in the first working state, so that the resistance network 211 forms the heating circuit with the battery 1. If the control type is the second type, the switch assembly 212 is controlled to work in the second working state, so that the resistance network 211 forms the pre-charging circuit with the battery 1 and the capacitive load Cl. If the control type is the third type, the switch assembly 212 is controlled to work in the third working state, so that the resistance network 211 forms the discharging circuit with the capacitive load Cl, by multiplexing the switchable resistance network 21, the pre-charging circuit, the heating circuit and the discharging circuit can be realized, the complexity and the volume of the battery control circuit 2 are reduced, and the cost is reduced.

[0133] In one embodiment, as shown in FIG. 7, a control device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to implement the charging and discharging control method in the above embodiment. To avoid repetition, details are not repeated here.

[0134] In an embodiment, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the charging and discharging control method in the above embodiment. To avoid repetition, details are not repeated here.

[0135] The embodiment provides a computer program product, including a computer program, and the computer program is executed by a processor to implement the charging and discharging control method. To avoid repetition, details are not repeated here.

[0136] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, storage, database or other medium used in the embodiments provided by the present disclosure can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0137] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of functional units and modules is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the above-described functions.

[0138] The embodiment provides a vehicle comprising the above-mentioned battery system.

[0139] The above-mentioned embodiments are only used to illustrate the technical solutions of the present disclosure, but not limit it; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the protection scope of the present disclosure.

Claims

1. A switchable resistance network (21), characterized by The application comprises: a resistance network (211), a first end of the resistance network being used for connecting a positive pole of a battery (1), a second end of the resistance network being used for connecting a capacitive load, a third end of the resistance network being used for connecting a negative pole of the battery; a switch assembly (212) connected with the resistance network, used for controlling the on-off of the resistance network and the battery and / or the capacitive load.

2. The switchable resistance network of claim 1, wherein, The switch assembly comprises a first switch circuit (2121) and a second switch circuit (2122); a first end of the first switch circuit is connected with the second end of the resistance network, a second end of the first switch circuit is coupled to the negative pole of the battery and a first end of the capacitive load; a first end of the second switch circuit is connected with the third end of the resistance network, a second end of the second switch circuit is connected with a second end of the capacitive load.

3. The switchable resistance network of claim 2, wherein, When the first switch circuit is turned on, the resistance network is used for forming a heating loop with the battery; When the second switch circuit is turned on, the resistance network is used for forming a pre-charging loop with the battery and the capacitive load; When the first switch circuit and the second switch circuit are both turned on, the resistance network is used for forming a discharging loop with the capacitive load.

4. The switchable resistance network of claim 2 or 3, wherein, The resistance network comprises a first resistance circuit (21A) and a second resistance circuit (21B); The first resistance circuit and the second resistance circuit are arranged in series between the positive pole of the battery and the first end of the first switch circuit; a connection node between the first resistance circuit and the second resistance circuit is connected with the first end of the second switch circuit.

5. The switchable resistance network of claim 4, wherein, The first resistance circuit comprises a first resistance and a third switch circuit (21A1); The first resistance is connected in series or in parallel with the third switch circuit.

6. The switchable resistance network of claim 5, wherein, There are multiple first resistances, and the multiple first resistances are connected in series and / or in parallel.

7. The switchable resistance network of claim 5 or 6, wherein, The first resistance circuit further comprises a second resistance and a fourth switch circuit (21A2); The second resistance is connected in parallel with the first resistance, and the fourth switch circuit is connected in parallel or in series with the second resistance; Alternatively, the second resistance is connected in series with the first resistance, and the fourth switch circuit is connected in parallel or in series with the second resistance.

8. A switchable resistance network as claimed in any of claims 4 to 7, characterised in that, The second resistance circuit comprises a third resistance and a fifth switch circuit (21B2); The third resistance is connected in series or in parallel with the fifth switch circuit.

9. The switchable resistance network of claim 8, wherein, There are multiple third resistances, and the multiple third resistances are connected in series and / or in parallel.

10. The switchable resistance network of claim 8 or 9, wherein, The second resistance circuit further comprises a fourth resistance and a sixth switch circuit (21B2); The fourth resistance is connected in parallel with the third resistance, and the sixth switch circuit is connected in parallel or in series with the fourth resistance; Alternatively, the fourth resistance is connected in series with the third resistance, and the sixth switch circuit is connected in parallel or in series with the fourth resistance.

11. A battery control circuit (2), characterized by The application comprises the switchable resistance network of any one of claims 1 to 10.

12. The battery control circuit of claim 11, wherein, The application further comprises a capacitive load; a first end of the capacitive load is connected with the third end of the resistance network through the switch assembly, and a second end of the capacitive load is connected with the second end of the resistance network through the switch assembly.

13. A battery system characterized by, The battery and the battery control circuit as claimed in claim 11 or 12.

14. The battery system of claim 13, wherein, The positive pole of the battery is connected to the first end of the resistance network and the second end of the capacitive load; The negative pole of the battery is connected to the switch assembly and the first end of the capacitive load.

15. The battery system of claim 13 or 14, wherein, The battery system further comprises a first contactor; The first end of the first contactor is connected to the positive pole of the battery and the first end of the resistance network; the second end of the first contactor is connected to the switch assembly and the second end of the capacitive load.

16. The battery system of any one of claims 13 to 15, wherein, The battery system further comprises a second contactor; The first end of the second contactor is connected to the negative pole of the battery; the second end of the second contactor is connected to the switch assembly and the first end of the capacitive load.

17. The battery system of any one of claims 13 to 16, wherein, The battery system further comprises a heating fuse; The first end of the heating fuse is connected to the switch assembly; the second end of the heating fuse is coupled to the negative pole of the battery.

18. The battery system of any one of claims 13 to 17, wherein, The battery system further comprises a current detection device; One end of the current detection device is coupled to the switch assembly; the other end of the current detection device is coupled to the negative pole of the battery.

19. A charge and discharge control method characterized by comprising: The battery system as claimed in any one of claims 13 to 18, comprising: receiving a charge-discharge control signal, the charge-discharge control signal comprising a control type; when the control type is a first type, controlling the switch assembly to work in a first working state, so that the resistance network cooperates with the battery to form a heating loop; when the control type is a second type, controlling the switch assembly to work in a second working state, so that the resistance network cooperates with the battery and the capacitive load to form a pre-charging loop; when the control type is a third type, controlling the switch assembly to work in a third working state, so that the resistance network cooperates with the capacitive load to form a discharging loop.

20. A control device comprising a memory, a processor, and a logic control program stored in the memory and executable on the processor, wherein, The processor executes the logic control program to implement the charge-discharge control method as claimed in claim 19.

21. A computer-readable storage medium, the computer-readable storage medium storing a computer program, characterized in that, The computer program is executed by the processor to implement the charge-discharge control method as claimed in claim 19.

22. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the charge-discharge control method as claimed in claim 19.

23. A vehicle characterized by comprising: The battery system as claimed in any one of claims 13 to 18.

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