Sampling circuit, energy storage device and electric equipment

Abstract

The utility model discloses a sampling circuit, an energy storage device and electric equipment. The sampling circuit comprises a plurality of information collectors and at least one carrier plate, one carrier plate is provided with the information collector, and the plurality of information collectors arranged on the same carrier plate are electrically connected. According to the sampling circuit, the use of cascade wire harnesses between the circuit boards can be reduced, resources are saved, and when the circuit board breaks down, a fault point can be conveniently and rapidly positioned. The plurality of information collectors are arranged on the carrier plate, so that external circuits are reduced, limitation of timeliness and precision of data collection caused by wire flying is avoided, and the integration level of the information collectors is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery management, and more specifically to a sampling circuit, an energy storage device and an electric device. Background Art

[0002] As the range of new energy vehicles increases, the total voltage of the battery pack also needs to be gradually increased. At present, the structure of the partition arrangement of single cells is basically fixed. As the total voltage of the battery pack increases, the positive and negative electrodes of the battery pack may have safety risks such as short circuit and arcing.

[0003] The high-voltage sampling circuit in the related technology is controlled by the battery management system, which mainly includes two modules: the battery execution and sampling unit and the battery information collector assembly. Among them, the battery information collector assembly can collect the voltage, temperature and other information of the single battery in real time and transmit it to the battery execution and sampling unit. In the current battery management system, the battery information sampling module used is still relatively independent and the integration is not high enough. Utility Model Content

[0004] The present invention is proposed to solve at least one of the above problems. According to the first aspect of the present application, a sampling circuit is provided, the sampling circuit comprising a plurality of information collectors and at least one carrier, a plurality of the information collectors are arranged on one carrier, and the plurality of the information collectors arranged on the same carrier are electrically connected.

[0005] In one embodiment of the present application, the sampling circuit further includes: a temperature acquisition circuit, and the temperature acquisition circuit is configured to acquire temperature data of the battery module.

[0006] In one embodiment of the present application, the sampling circuit further includes a voltage acquisition circuit, and the voltage acquisition circuit is used to connect to the battery module and is configured to acquire the single cell voltage of the single cell in the battery module.

[0007] In one embodiment of the present application, the plurality of information collectors are electrically connected to the temperature collection circuit and the voltage collection circuit, respectively, and are used to connect to a controller, and are configured to sample the temperature data to obtain a temperature sampling signal, sample the cell voltage, and generate a voltage collection signal.

[0008] In one embodiment of the present application, the temperature acquisition circuit includes: a temperature sensor, a first voltage-dividing resistor and a first power supply; the temperature sensor is connected to the first end of the first voltage-dividing resistor, and the second end of the first voltage-dividing resistor is connected to the first power supply; wherein the first end of the first voltage-dividing resistor is also connected to the information collector.

[0009] In one embodiment of the present application, the voltage acquisition circuit includes: a second voltage-dividing resistor and a first capacitor; the first end of the second voltage-dividing resistor is connected to the battery module, the second end of the second voltage-dividing resistor is connected to the first end of the first capacitor, and the second end of the first capacitor is grounded; wherein the second end of the second voltage-dividing resistor is also connected to the information collector.

[0010] In one embodiment of the present application, at least one of the plurality of signal collectors disposed on each of the carrier boards is connected to the controller via a daisy chain.

[0011] In one embodiment of the present application, the sampling circuit also includes multiple main control boards, each of the information collectors corresponds to one main control board, each of the information collectors includes multiple components, and the multiple components of at least one of the information collectors are respectively arranged on the first surface and the second surface of the same main control board.

[0012] According to a second aspect of the present application, there is provided an energy storage device, comprising: a battery pack, the battery pack comprising at least one battery module; at least one sampling circuit as described above, each battery module corresponding to one sampling circuit; and a controller connected to an information collector in the sampling circuit, and configured to process a temperature sampling signal and a voltage sampling signal.

[0013] In one embodiment of the present application, the energy storage device further includes: an insulation sampling circuit, which is respectively connected to the positive electrode of the battery pack and the controller, and is configured to collect the voltage of the positive electrode of the battery pack and output the positive electrode voltage; wherein the controller is also used to obtain the insulation resistance value according to the positive electrode voltage.

[0014] In one embodiment of the present application, the insulation sampling circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a first contactor, a second contactor and a third contactor; the first resistor, the second resistor, the third resistor and the fourth resistor are connected in series between the first contactor and the second contactor, the other end of the first contactor is connected to the positive electrode of the battery pack, the other end of the second contactor is connected between the first resistor and the second resistor, the first end of the third contactor is connected between the second resistor and the third resistor, the second end of the third contactor is grounded, and the connection point between the third resistor and the fourth resistor is connected to the controller.

[0015] In one embodiment of the present application, the battery pack includes a plurality of the battery modules, the number of the sampling circuits is multiple, the battery modules correspond one to one with the sampling circuits, the plurality of the battery modules are connected in series, and the information collectors in the plurality of the sampling circuits are connected in sequence.

[0016] In one embodiment of the present application, the battery pack includes a plurality of the battery modules, and the plurality of the battery modules are connected in series, and the energy storage device further includes: a positive shunt and a negative shunt; the positive shunt is connected to the positive electrode of the battery pack, the negative shunt is connected to the negative electrode of the battery pack, and the positive shunt and the negative shunt are both connected to the controller; wherein the controller is further configured to calibrate the current information collected by the positive shunt and the negative shunt.

[0017] In one embodiment of the present application, the battery pack includes a plurality of the battery modules, the plurality of the battery modules are connected in series, a safety protection module is arranged between two of the battery modules connected in series, and the safety protection module is configured to be able to disconnect the connection between the two battery modules and keep the two battery modules connected.

[0018] In one embodiment of the present application, the safety protection module includes: a first fuse, a voltage divider contactor, and a second fuse; the first fuse, the voltage divider contactor, and the second fuse are connected in series between two adjacent battery modules.

[0019] In one embodiment of the present application, the energy storage device includes a plurality of carrier boards, each carrier board is provided with a plurality of the information collectors, and the information collectors on adjacent carrier boards are connected via a daisy chain.

[0020] According to a third aspect of the present application, an electric device is provided, the electric device comprising: the above-mentioned energy storage device.

[0021] According to the sampling circuit, energy storage device and electric device provided in the embodiments of the present application, the sampling circuit of the present application can reduce the use of cascaded wiring harnesses between circuit boards, save resources, and facilitate rapid location of the fault point when a circuit board fails. By setting multiple information collectors on the carrier board, the external circuit is reduced, the timeliness and accuracy of data collection caused by flying wires are avoided, and the integration of the information collector is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a sampling circuit provided in one embodiment of the utility model;

[0024] Figure 2 A circuit schematic diagram of a temperature acquisition circuit and a voltage sampling circuit provided in an embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the structure of an energy storage device provided in one embodiment of the utility model;

[0026] Figure 4 A schematic diagram of the structure of an energy storage device provided in another embodiment of the utility model;

[0027] Figure 5 A circuit schematic diagram of an insulation sampling circuit provided in one embodiment of the utility model;

[0028] Figure 6 A schematic diagram of the structure of an energy storage device provided in yet another embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of the structure of an electric device provided in one embodiment of the utility model. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more obvious, the exemplary embodiments according to the utility model will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments of the utility model, and it should be understood that the utility model is not limited to the exemplary embodiments described here. Based on the embodiments of the utility model described in the utility model, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the utility model.

[0031] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0032] It should be understood that the utility model can be implemented in different forms and should not be interpreted as being limited to the embodiments proposed herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

[0033] In order to thoroughly understand the present invention, a detailed structure will be presented in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0034] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] The present application provides a sampling circuit, such as Figure 1 As shown, the sampling circuit 100 includes a plurality of information collectors 1003 and at least one carrier board 1004 .

[0036] Specifically, the sampling circuit 100 further includes a temperature acquisition circuit 1001 and a voltage acquisition circuit 1002 .

[0037] in, Figure 1 The number of information collectors 1003 given in the figure is 2, and the number of carrier boards 1004 is 1, which is only an example. The specific number of information collectors 1003 and carrier boards 1004 can be determined according to actual application conditions.

[0038] The temperature acquisition circuit 1001 is configured to acquire temperature data of the battery module 2001 .

[0039] Specifically, Figure 2 As shown, the temperature acquisition circuit 1001 includes: a temperature sensor N1, a first voltage-dividing resistor R1 and a first power supply V1. The temperature sensor N1 is connected to the first end of the first voltage-dividing resistor R1, and the second end of the first voltage-dividing resistor R1 is connected to the first power supply V1. The first end of the first voltage-dividing resistor R1 is also connected to the information collector 1003.

[0040] As an example, the temperature sensor N1 may be attached to a single battery in the battery module 2001 , and the collected temperature data of the single battery may be used as the temperature data of the battery module 2001 .

[0041] The voltage collection circuit 1002 is used to connect to the battery module 2001 and is configured to collect the single cell voltage of the single cell in the battery module 2001 .

[0042] Specifically, Figure 2 As shown, the voltage acquisition circuit 1002 includes: a second voltage-dividing resistor R2 and a first capacitor C1; the first end of the second voltage-dividing resistor R2 is connected to the battery module 2001, the second end of the second voltage-dividing resistor R2 is connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 is grounded; wherein the second end of the second voltage-dividing resistor R2 is also connected to the information collector 1003.

[0043] It should be noted that the voltage acquisition circuit 1002 can remove or reduce noise, interference or unnecessary fluctuations within a specific frequency range of the signal in the circuit by using the first capacitor C1, thereby achieving a filtering effect.

[0044] A plurality of information collectors 1003 are arranged on a carrier board 1004, and the plurality of information collectors arranged on the same carrier board 1004 are electrically connected to each other through the conductive wiring on the carrier board 1004, wherein the plurality of information collectors 1003 are electrically connected to the temperature acquisition circuit 1001 and the voltage acquisition circuit 1002 respectively, and are used to connect to the controller 300, and are configured to sample temperature data, obtain temperature sampling signals, sample monomer voltages, generate voltage acquisition signals, and send temperature sampling signals and voltage sampling signals to the controller 300. By arranging the plurality of information collectors on the carrier board, the external circuits are reduced, the timeliness and accuracy of data acquisition are limited due to flying wires, and the integration of the information collector is improved.

[0045] It is worth mentioning that multiple information collectors 1003 are arranged on a carrier board 1004, which is similar to a neuron structure and improves the integration of the information collector 1003.

[0046] As an example, the number of information collectors 1003 is 2, and both information collectors 1003 are electrically connected to the temperature collection circuit 1001 and the voltage collection circuit 1002. The two information collectors 1003 are connected via conductive wiring on the carrier 1004, and one of the information collectors 1003 is electrically connected to the controller 300.

[0047] The sampling circuit 100 of the embodiment of the utility model can reduce the use of cascaded wiring harnesses between circuit boards, save resources, and facilitate rapid location of the fault point when a fault occurs between circuit boards. By arranging multiple information collectors 1003 on the carrier board 1004, the external circuit is reduced, the timeliness and accuracy of data collection caused by flying wires are avoided, and the integration of the information collector 1003 is improved.

[0048] In some embodiments, at least one of the plurality of signal collectors disposed on each carrier board 1004 is connected to the controller 300 via a daisy chain.

[0049] It should be noted that the daisy chain is a serial connection method, in which the output of the signal collector is connected to the input of the controller 300 to form a chain connection structure.

[0050] In this embodiment, by connecting the signal collector and the controller 300 using a daisy chain, the number of cables and wire harnesses can be reduced and the wiring structure can be simplified.

[0051] In some embodiments, the sampling circuit 100 further includes multiple main control boards, each information collector 1003 corresponds to one main control board, each information collector 1003 includes multiple components, and the multiple components of at least one information collector 1003 are respectively arranged on the first surface and the second surface of the same main control board.

[0052] In this embodiment, by arranging the components in the information collector 1003 on two sides of the same main control board, the space in the main control board is fully utilized, the size of the main control board is reduced, and the space utilization rate is improved.

[0053] In the related art, a high-voltage battery pack generally requires 8 to 10 independent information collector 1003 circuit boards, and 16 to 20 exposed cascade lines and I / O (Input / Output) ports between components are required. The circuits in this method are complex and the exposed lines are too long, which may cause wire impedance, thus affecting the timeliness and accuracy of the collected data, and are prone to wear and tear and difficult to maintain.

[0054] Therefore, the present application also provides an energy storage device, such as Figure 3 As shown, the energy storage device 10 includes: a battery pack 200 , at least one of the above-mentioned sampling circuits 100 , and a controller 300 .

[0055] It should be noted that Figure 3 The number of information collectors 1003 given in the figure is 2, and the controller 300 is connected to one of the information collectors 1003. This is only an example, and the number and connection method of the specific information collectors 1003 can be determined according to actual application conditions.

[0056] The battery pack 200 includes at least one battery module 2001 , and each battery module 2001 corresponds to a sampling circuit.

[0057] The controller 300 is connected to the information collector 1003 in the sampling circuit 100 and is configured to process the temperature sampling signal and the voltage sampling signal.

[0058] It should be noted that the controller 300 may be a component or device for processing and analyzing data. The controller 300 may receive, process and convert input data to generate useful output results or implement specific functions.

[0059] As an example, the controller 300 can process the temperature sampling signal to determine the thermal runaway state of the battery. For example, the battery pack 200 has thermal runaway, or the battery pack 200 has not thermal runaway. When it is determined that the battery pack 200 has thermal runaway, the controller 300 can issue a thermal runaway alarm signal. The controller 300 can also process the voltage sampling signal, obtain the voltage information of the battery pack 200, and further determine whether the working state of the battery pack 200 is normal. For example, when the battery pack 200 has safety problems such as a short circuit, the controller 300 can issue a battery operation abnormality signal.

[0060] The energy storage device 10 of the embodiment of the utility model can enhance the safety of the battery pack 200 by adopting the above-mentioned sampling circuit 100, and avoid short circuit and arc problems in the battery pack 200. At the same time, it reduces the external circuit, avoids the limitation of the timeliness and accuracy of data collection caused by flying wires, and improves the integration of the information collector 1003.

[0061] In some embodiments, Figure 4 As shown, the energy storage device 10 further includes: an insulation sampling circuit 400, which is connected to the positive electrode of the battery pack 200 and the controller 300, respectively, and is configured to collect the voltage of the positive electrode of the battery pack 200 and output the positive electrode voltage. The controller 300 is also used to obtain the insulation resistance value according to the positive electrode voltage.

[0062] Specifically, Figure 5 As shown, the insulation sampling circuit 400 includes: a first resistor R3, a second resistor R4, a third resistor R5, a fourth resistor R6, a first contactor K1, a second contactor K2 and a third contactor K3; the first resistor R3, the second resistor R4, the third resistor R5 and the fourth resistor R6 are connected in series between the first contactor K1 and the second contactor K2, the other end of the first contactor K1 is connected to the positive electrode of the battery pack 200, the other end of the second contactor is connected between the first resistor R3 and the second resistor R4, the first end of the third contactor K3 is connected between the second resistor R4 and the third resistor R5, the second end of the third contactor K3 is grounded, and the connection point between the third resistor R5 and the fourth resistor R6 is connected to the controller 300.

[0063] As an example, the controller 300 can obtain the insulation resistance value according to the pull-in state of the second contactor K2 and the third contactor K3. The controller 300 can judge the insulation state of the battery pack 200 according to the obtained insulation resistance value to determine whether the working state of the battery pack 200 is normal. For example, if the insulation resistance value is higher than the set threshold, it is determined that the insulation state is good; if the insulation resistance value is lower than the set threshold, it indicates that there is an insulation problem or fault, and the power should be cut off in time to protect the battery pack 200.

[0064] As another example, the energy storage device 10 further includes a positive contactor K4 connected between the insulation sampling circuit and the positive electrode of the battery pack 200. At the same time, the insulation resistance value obtained by the controller 300 can determine the working state of the positive contactor K4 and whether sintering occurs.

[0065] In this embodiment, by adding an insulation sampling circuit, the insulation status of the battery pack 200 can be obtained in real time, and by monitoring the changes in the insulation resistance, the insulation fault in the energy storage device 10 can be discovered in time, so that corresponding measures can be taken in advance to prevent damage to the battery pack 200 or the occurrence of safety accidents.

[0066] In some embodiments, the battery pack 200 includes multiple battery modules 2001, the number of sampling circuits 100 is multiple, the battery modules 2001 correspond to the sampling circuits 100 one by one, the multiple battery modules 2001 are connected in series, and the information collectors 1003 in the multiple sampling circuits 100 are connected in sequence.

[0067] Specifically, the energy storage device further includes a plurality of carrier boards 1004 , each carrier board 1004 is provided with a plurality of information collectors, and the information collectors 1003 on adjacent carrier boards 1004 are connected via a daisy chain.

[0068] As an example, the output of the information collector 1003 on the previous carrier board 1004 may be connected to the input of the information collector 1003 on the next carrier board 1004 , and finally connected to the controller 300 .

[0069] In this embodiment, by embedding the information collector 1003 in the carrier board 1004, 2 to 3 main acquisition circuits can be integrated into the same carrier board 1004, that is, each battery pack 200 only needs 4 to 6 main control boards, and only 8 to 12 exposed cascade lines and I / O ports are needed. It can reduce the exposed cascade lines and I / O ports, save independent device resources, reduce external circuits, avoid flying wires that limit the timeliness and accuracy of data acquisition, and improve the integration of the information collector 1003.

[0070] In some embodiments, the battery pack 200 includes a plurality of battery modules 2001, and the plurality of battery modules 2001 are connected in series. The energy storage device 10 also includes: a positive shunt 500 and a negative shunt 600; the positive shunt 500 is connected to the positive electrode of the battery pack 200, and the negative shunt 600 is connected to the negative electrode of the battery pack 200, and the positive shunt 500 and the negative shunt 600 are both connected to the controller 300; wherein the controller 300 is further configured to calibrate the current information collected by the positive shunt 500 and the negative shunt 600.

[0071] It should be noted that the positive shunt 500 and the negative integrator can shunt the current in the battery pack 200 to the controller 300 for processing. The controller 300 can compare the positive current information and negative current information of the battery pack 200 obtained to more accurately understand the status and working condition of the battery pack 200.

[0072] In this embodiment, by using the positive shunt 500 and the negative shunt 600 , the controller 300 can accurately monitor and control the entire energy storage device 10 .

[0073] In some embodiments, the battery pack 200 includes a plurality of battery modules 2001, which are connected in series. A safety protection module 700 is disposed between two battery modules 2001 connected in series. The safety protection module 700 is configured to be able to disconnect the connection between the two battery modules 2001 and keep the two battery modules 2001 connected.

[0074] Specifically, the safety protection module 700 includes: a first fuse FU1 , a voltage divider contactor K5 , and a second fuse FU2 ; the first fuse FU1 , the voltage divider contactor K5 , and the second fuse FU2 are connected in series between two adjacent battery modules 2001 .

[0075] It should be noted that the voltage divider contactor K5 is used to isolate two adjacent battery modules 2001, and the first fuse FU1 and the second fuse FU2 can force a circuit break to ensure the safety of the battery pack 200 when an abnormality occurs in the circuit.

[0076] Specifically, the first fuse FU1 can protect the positive contactor K4, and the second fuse FU2 can protect the voltage divider contactor K5. For example, when the positive contactor K4 is sintered, the first fuse FU1 is blown to cut off the circuit; when the voltage divider contactor K5 is sintered, the second fuse FU2 is blown to cut off the circuit, thereby preventing the safety protection function of the safety protection module 700 from failing.

[0077] Typically, the arrangement structure of the battery modules 2001 in the battery pack 200 causes the positive and negative poles of the single battery to be close to each other. There are no other components or circuit designs between the battery modules 2001 for protection, which poses a safety risk of positive and negative short circuits and arcing. Therefore, by adding a voltage divider contactor K5 between the battery modules 2001 and isolating the positive and negative poles of adjacent battery modules 2001, the safety risk of short circuits or arcing can be avoided. At the same time, by adding the first fuse FU1 and the second fuse FU2, their fusing properties can be used to ensure that the battery module 2001 is disconnected under extreme conditions, thereby ensuring the safety of the electric device.

[0078] Next, if Figure 6As shown, the circuit structure of the utility model is described by taking the battery pack 200 including two battery modules 2001 as an example. The two battery modules 2001 correspond to one sampling circuit 100 respectively, and there are two information collectors 1003 on the carrier 1004 of each sampling circuit 100. The information collectors 1003 on the carrier 1004 are electrically connected through the conductive wiring on the carrier 1004. Any one of the information collectors 1003 in the two sampling circuits 100 is connected through a daisy chain, and the information collector 1003 in one of the sampling circuits 100 is connected to the controller 300 through the daisy chain. The first fuse FU1, the voltage divider contactor K5 and the second fuse FU2 are connected in series between two adjacent battery modules 2001. The other end of the first contactor K1 in the insulating sampling circuit is connected to the positive electrode of one of the battery modules 2001, and the connection point between the third resistor R5 and the fourth resistor R6 in the insulating sampling circuit is connected to the controller 300. The two battery modules 2001 are connected in series between the first end of the positive shunt 500 and the first end of the negative shunt 600, the second end of the positive shunt 500 and the second end of the negative shunt 600 are both connected to the controller 300, and the third end of the positive shunt 500 is connected to the positive contactor K4.

[0079] In addition, the present application also provides an electric device, such as Figure 7 As shown, the electric device 1 includes: the energy storage device 10 mentioned above.

[0080] The electric device of the embodiment of the utility model can enhance the safety of the battery pack 200 by adopting the above energy storage device 10, and avoid short circuit and arc problems in the battery pack 200. At the same time, it reduces the external circuit, avoids the limitation of the timeliness and accuracy of data collection caused by flying wires, and improves the integration of the information collector 1003.

[0081] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0082] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a functional division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0083] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0084] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various utility model aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. The claimed application requires more features than those explicitly stated in each claim. More specifically, as reflected in the corresponding claims, its utility model point is that the corresponding technical problem can be solved with features less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0085] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including accompanying claims, abstracts and drawings) and all units of any device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0086] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0087] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

[0088] The above is only a specific implementation or description of a specific implementation of the present application, and the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A sampling circuit, characterized in that: The sampling circuit includes a plurality of information collectors and at least one carrier board. A plurality of the information collectors are arranged on one carrier board, and the plurality of information collectors arranged on the same carrier board are electrically connected to each other.

2. The sampling circuit according to claim 1, characterized in that: The sampling circuit further includes: a temperature acquisition circuit, and the temperature acquisition circuit is configured to acquire temperature data of the battery module.

3. The sampling circuit according to claim 2, characterized in that: The sampling circuit also includes a voltage collection circuit, which is used to connect to the battery module and is configured to collect single cell voltages of single cells in the battery module.

4. The sampling circuit according to claim 3, characterized in that: The multiple information collectors are electrically connected to the temperature collection circuit and the voltage collection circuit respectively, and are used to connect to the controller, and are configured to sample the temperature data to obtain a temperature sampling signal, sample the single cell voltage, and generate a voltage collection signal.

5. The sampling circuit according to claim 2, characterized in that: The temperature acquisition circuit comprises: a temperature sensor, a first voltage-dividing resistor and a first power supply; The temperature sensor is connected to a first end of the first voltage-dividing resistor, and a second end of the first voltage-dividing resistor is connected to the first power supply; Wherein, the first end of the first voltage-dividing resistor is also connected to the information collector.

6. The sampling circuit according to claim 3, characterized in that: The voltage acquisition circuit comprises: a second voltage-dividing resistor and a first capacitor; A first end of the second voltage-dividing resistor is connected to the battery module, a second end of the second voltage-dividing resistor is connected to a first end of the first capacitor, and a second end of the first capacitor is grounded; Wherein, the second end of the second voltage-dividing resistor is also connected to the information collector.

7. The sampling circuit according to claim 4, characterized in that: At least one of the plurality of information collectors disposed on each of the carrier boards is connected to the controller via a daisy chain.

8. The sampling circuit according to claim 1, characterized in that: The sampling circuit also includes multiple main control boards, each of the information collectors corresponds to one main control board, each of the information collectors includes multiple components, and the multiple components of at least one of the information collectors are respectively arranged on the first surface and the second surface of the same main control board.

9. An energy storage device, characterized in that: The energy storage device comprises: A battery pack, the battery pack comprising at least one battery module; At least one sampling circuit according to any one of claims 1 to 8, each battery module corresponding to one sampling circuit; The controller is connected to the information collector in the sampling circuit and is configured to process the temperature sampling signal and the voltage sampling signal.

10. The energy storage device according to claim 9, characterized in that: The energy storage device further includes: an insulating sampling circuit, connected to the positive electrode of the battery pack and the controller respectively, configured to collect the voltage of the positive electrode of the battery pack and output the positive electrode voltage; Wherein, the controller is also used to obtain the insulation resistance value according to the positive electrode voltage.

11. The energy storage device according to claim 10, characterized in that: The insulation sampling circuit comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, a first contactor, a second contactor and a third contactor; The first resistor, the second resistor, the third resistor and the fourth resistor are connected in series between the first contactor and the second contactor, the other end of the first contactor is connected to the positive electrode of the battery pack, the other end of the second contactor is connected between the first resistor and the second resistor, the first end of the third contactor is connected between the second resistor and the third resistor, the second end of the third contactor is grounded, and the connection point between the third resistor and the fourth resistor is connected to the controller.

12. The energy storage device according to claim 9, characterized in that: The battery pack includes a plurality of the battery modules, the number of the sampling circuits is multiple, the battery modules correspond to the sampling circuits one by one, the plurality of battery modules are connected in series, and the information collectors in the plurality of sampling circuits are connected in sequence.

13. The energy storage device according to claim 9, characterized in that: The battery pack includes a plurality of the battery modules, and the plurality of the battery modules are connected in series. The energy storage device further includes: a positive shunt and a negative shunt; The positive shunt is connected to the positive electrode of the battery pack, the negative shunt is connected to the negative electrode of the battery pack, and both the positive shunt and the negative shunt are connected to the controller; Wherein, the controller is further configured to calibrate the current information collected by the positive shunt and the negative shunt.

14. The energy storage device according to claim 9, characterized in that: The battery pack includes a plurality of battery modules, which are connected in series. A safety protection module is provided between two battery modules connected in series, and the safety protection module is configured to be able to disconnect the connection between the two battery modules and keep the two battery modules connected.

15. The energy storage device according to claim 14, characterized in that: The safety protection module comprises: a first fuse, a voltage dividing contactor and a second fuse; The first fuse, the voltage-dividing contactor and the second fuse are connected in series between two adjacent battery modules.

16. The energy storage device according to claim 9, characterized in that: The energy storage device includes a plurality of carrier boards, each of which is provided with a plurality of the information collectors, and the information collectors on adjacent carrier boards are connected via a daisy chain.

17. An electric device, characterized in that: The electric device comprises: an energy storage device as claimed in any one of claims 9 to 16.

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