Voltage sampling structure, battery and vehicle

Abstract

The utility model relates to a voltage sampling structure, a battery and a vehicle. The voltage sampling structure comprises an insulator and a sampling body arranged on the insulator, the sampling body comprises a first sampling part used for being connected with an electrode terminal of a single battery, a second sampling part used for being connected with a shell of the single battery and a connecting part connected between the first sampling part and the second sampling part, the sampling body is integrally formed in a punching mode, and the connecting part is arranged between the first sampling part and the second sampling part. And the sampling body is simpler in structure and lower in cost while ensuring the function realization.

Description

Technical Field

[0001] The present disclosure relates to the field of new energy technology, and in particular to a voltage sampling structure, a battery and a vehicle. Background Art

[0002] With the increasing development of new energy vehicles, the safety performance of batteries has received more and more attention. By collecting the voltage of battery cells, it is beneficial to improve the safety performance of battery cells. The voltage sampling method varies according to the structure of the battery cells and the position of the poles. For example, for battery cells with poles on both sides, such as blade batteries, the battery cells are generally longer and the distance between the positive and negative poles is also farther.

[0003] The sampling scheme for blade batteries is to arrange the cell monitoring units (CMU) on one side of the battery cells after they are grouped, and the flexible printed circuit board (FPC) on the other side. The FPC is used to transfer the potential of the pole on the other side of the battery cell to the battery cell shell. The CMU collects the potential of the shell to collect the potential of the other side, and then obtains the voltage of each battery cell.

[0004] Currently, the voltage sampling structures suitable for blade batteries mainly include conventional FPC and FDC (Flexible Die-cutting Circuit, FDC). However, both conventional FPC and FDC have relatively complex processing technology and structure, resulting in high parts costs. Utility Model Content

[0005] In order to overcome the problems existing in the related art, the present disclosure provides a voltage sampling structure, a battery and a vehicle.

[0006] According to a first aspect of an embodiment of the present disclosure, a voltage sampling structure is provided, comprising an insulator and a sampling body arranged on the insulator, the sampling body comprising: a first sampling portion for connecting to an electrode terminal of a battery cell, a second sampling portion for connecting to a housing of the battery cell, and a connecting portion connected between the first sampling portion and the second sampling portion, wherein the sampling body is integrally stamped.

[0007] Optionally, the first sampling portion includes: a first mounting section for connecting to the insulator, a first bending section connected to the first mounting section and bent in a direction away from the insulator, and a first sampling section connected to the first bending section and connected to the electrode terminal of the battery cell; and / or

[0008] The second sampling portion includes: a second installation section for connecting to the insulator, a second bending section connected to the second installation section and bent away from the insulator, and a second sampling section connected to the second bending section and connected to the housing of the battery cell.

[0009] Optionally, the first sampling portion, the connecting portion and the second sampling portion are of an integrated structure.

[0010] Optionally, the connecting portion is a fuse that can be blown when the current flowing through the sampling body is greater than a preset value.

[0011] Optionally, the insulator is in the shape of an elongated strip, and there are a plurality of sampling bodies, and the plurality of sampling bodies are arranged at intervals along the length direction of the insulator.

[0012] Optionally, a weakening structure is provided at a portion of the insulator located between two adjacent sampling bodies.

[0013] Optionally, the weakening structure comprises a plurality of tooth holes arranged at intervals along the width direction of the insulator.

[0014] Optionally, the sampling body is fixedly arranged on the insulator, and / or the insulator is provided with mounting holes spaced apart along the length direction for mounting and cooperating with characteristic structures on the battery cell.

[0015] According to a second aspect of an embodiment of the present disclosure, a battery is provided, comprising a plurality of stacked battery cells and any one of the voltage sampling structures described above.

[0016] According to a third aspect of an embodiment of the present disclosure, there is provided a vehicle comprising any one of the batteries described above.

[0017] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the voltage sampling structure provided by the present disclosure includes an insulator and a sampling body, the first sampling portion of the sampling body is connected to the electrode terminal of the battery cell, and the second sampling portion is connected to the shell of the battery cell, so that the potential on one side of the battery cell can be transferred to the shell of the battery cell, and can be collected by the battery cell sampling unit on the other side of the battery cell. Among them, the sampling body is integrally stamped and formed, and this integrally stamped structure is different from the circuit pattern formed by the conventional FPC through the previous process such as etching and is different from the way that the conventional FPC and FDC form functional devices through the surface mounting technology. The circuit pattern and the functional structure are stamped out at the same time as the sampling body, so that the sampling body is simpler in structure and lower in cost while ensuring the realization of the function, and the functional structure is integrally stamped and formed on the sampling body, and the connection strength with the sampling body is also higher than that of the functional device formed by the surface mounting process.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] Figure 1 is a schematic diagram showing a voltage sampling structure according to an exemplary embodiment.

[0021] Figure 2 is a schematic diagram of a sampling body according to an exemplary embodiment.

[0022] Figure 3 is a schematic diagram of an insulator according to an exemplary embodiment.

[0023] Figure 4 is a schematic diagram of a battery module according to an exemplary embodiment.

[0024] Description of Reference Numerals

[0025] 100-voltage sampling structure, 1-insulator, 11-weakening structure, 111-tooth hole, 12-mounting hole, 2-sampling body, 21-first sampling part, 211-first mounting section, 212-first bending section, 213-first sampling section, 22-second sampling part, 221-second mounting section, 222-second bending section, 223-second sampling section, 23-connecting part, 200-battery cell, 300-bus. DETAILED DESCRIPTION

[0026] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0027] The embodiments described in some embodiments of the present disclosure below do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0028] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0029] like Figure 1 As shown, an exemplary embodiment of the present disclosure provides a voltage sampling structure 100, which is suitable for voltage sampling of a battery, and is particularly suitable for batteries such as blade batteries, where poles are located on both sides and the battery cells 200 are relatively long. The voltage sampling structure 100 belongs to the switching process in the voltage sampling process, that is, after the battery cells are grouped, a battery cell sampling unit (CMU) is arranged on one side, and the voltage sampling structure 100 is arranged on the other side. The voltage sampling structure 100 is used to transfer the potential of the electrode terminal of the battery cell on the other side of the battery cell to the shell of the battery cell. The CMU collects the potential of the shell of the battery cell to collect the potential of the other side, and then obtains the voltage of each battery cell.

[0030] Specifically, the voltage sampling structure 100 provided by the present disclosure includes an insulator 1 and a sampling body 2 disposed on the insulator 1. The insulator 1 can be regarded as a mounting structure, which is used to fix the sampling body 2 to the battery cell 200 and support the sampling body 2, and can also prevent the sampling body 2 from improperly contacting the battery cell 200 to cause a short circuit and other problems.

[0031] The sampling body 2 can be made of aluminum and aluminum alloy, copper and copper alloy or other conductive materials. Figure 2 As shown, the sampling body 2 includes: a first sampling part 21 for connecting to the electrode terminal of the battery cell, a second sampling part 22 for connecting to the shell of the battery cell, and a connecting part 23 connected between the first sampling part 21 and the second sampling part 22. Among them, the sampling body 2 is stamped and formed in one piece. Here, the sampling body 2 is stamped and formed in one piece, which means that while the overall shape of the first sampling part 21, the second sampling part 22 and the connecting part 23 are stamped out, the circuit pattern and functional structure are stamped out on the first sampling part 21 and the second sampling part 22. The first sampling part 21 can be directly connected to the electrode terminal or connected to the electrode terminal through the bus 300 of multiple battery cells 200 connected in series. Specifically, when working, the first sampling part 21 transfers the potential of one side of the battery cell to the voltage of the battery cell through the connecting part 23 and the second sampling part 22 in sequence, and the battery cell sampling unit on the other side of the battery cell 200 collects the potential of the shell of the battery cell. In this way, even in the case of a blade battery, which has electrode terminals on both sides, the voltage of each battery cell 200 can be collected.

[0032] The integrated stamped circuit pattern and functional structure disclosed in the present invention are different from conventional FPC and FDC. Specifically, conventional FPC needs to go through etching and other pre-processes and surface mount technology (SMT) and other subsequent processes to obtain it, while FDC obtains the circuit pattern by die cutting and then assembles the functional device by SMT. The present invention can use the concave and convex indentations formed on the sample body 2 by the mold as circuit patterns and functional structures, and realize the function of transferring potential. Therefore, the sample body 2 provided by the present invention is simpler in structure and lower in cost than conventional FPC and FDC while ensuring the realization of the function, and the functional structure is integrally stamped on the sample body, and the connection strength with the sample body is also higher than that of the functional device formed by the surface mounting process.

[0033] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: the voltage sampling structure provided by the present disclosure includes an insulator 1 and a sampling body 2, the insulator 1 is used to fix and support the sampling body 2, the first sampling portion 21 of the sampling body 2 is connected to the electrode terminal of the battery cell, and the second sampling portion 22 is connected to the shell of the battery cell, so that the potential on one side of the battery cell 200 can be transferred to the shell of the battery cell, and can be collected by the battery cell sampling unit on the other side of the battery cell 200. Among them, the sampling body is integrally stamped and formed, and this integrally stamped structure is different from the circuit pattern formed by the conventional FPC through the preceding process such as etching and the way that the conventional FPC and FDC form functional devices through the surface mounting technology. The circuit pattern and the functional structure are stamped out at the same time as the sampling body is stamped out, so that the sampling body 2 is simpler in structure and has a lower cost while ensuring the realization of the function, and the functional structure is integrally stamped and formed on the sampling body 2, and the connection strength with the sampling body 2 is also higher than that of the functional device formed by the surface mounting process.

[0034] In some embodiments, the first sampling portion 21 can be bent so as to be connected to the insulator 1 and the electrode terminal of the battery cell respectively. Figure 2 As shown, the first sampling portion 21 may include: a first mounting section 211 for connecting to the insulator 1, a first bending section 212 connected to the first mounting section 211 and bent in a direction away from the insulator 1, and a first sampling section 213 connected to the first bending section 212 for connecting to the electrode terminal of the battery cell, that is, the cross section of the first sampling portion 21 may be constructed as a substantially Z-shaped structure. The sampling body 2 is in a sheet shape in the initial state, and may be bent after being connected to the insulator 1, or may be bent first and then connected to the insulator 1.

[0035] In other embodiments, the second sampling portion 22 can be bent so as to be connected to the insulator 1 and the battery cell housing, respectively. Figure 2As shown, the second sampling portion may include: a second mounting section 221 for connecting to the insulator 1, a second bending section 222 connected to the second mounting section 221 and bent in a direction away from the insulator 1, and a second sampling section 223 connected to the second bending section 222 for connecting to the housing of the battery cell, that is, the cross section of the second sampling portion 22 may be constructed as a substantially Z-shaped structure. The sampling body 2 is in a sheet shape in the initial state, and may be bent after being connected to the insulator 1, or may be bent first and then connected to the insulator 1.

[0036] The first sampling part 21, the connecting part 23 and the second sampling part 22 can be an integrated structure, that is, the sampling body 2 including the first sampling part 21, the connecting part and the second sampling part 22 is a whole, for example, obtained by stamping, that is, the circuit pattern and the functional structure can be formed on the first sampling part 21 and the second sampling part 22 while forming the first sampling part 21, the connecting part 23 and the second sampling part 22 by stamping. This integrated structure of the sampling body 2 is simple in structure, reduces the assembly between parts, is conducive to improving assembly efficiency, and has high connection strength. Optionally, the connecting part 23 can be a fuse that can be blown when the current flowing through the sampling body 2 is greater than a preset value, so that when the sampling body 2 is accidentally short-circuited, the fuse can be blown in time to protect the sampling circuit and ensure the safety of the battery.

[0037] The insulator 1 can be made of insulating materials such as PI film, PET film, etc. According to the voltage sampling structure provided by the embodiment of the present disclosure, Figure 3 As shown, the insulator 1 can be constructed in a long strip shape, and its specific length can be determined according to the number of battery cells 200 stacked in the battery module. Among them, the number of sampling bodies 2 can be multiple, and the multiple sampling bodies 2 are arranged at intervals along the length direction of the insulator 1. For example, the number of sampling bodies 2 can correspond to the number of electrode terminals to be connected. That is, integrating multiple sampling bodies 2 on an insulator 1 is conducive to reducing the number of parts to be installed and improving assembly efficiency.

[0038] Further, continue to refer to Figure 3, a weakening structure 11 is provided at a portion of the insulator 1 between two adjacent sampling bodies 2, and the weakening structure 11 is used to ensure that the battery cell 200 can be easily pulled apart when it swells, for example, at the end of its life, so as to protect the sampling circuit and ensure the safety of the battery. In some embodiments, the weakening structure 11 may include a plurality of tooth holes 111 spaced apart along the width direction of the insulator 1. Due to the presence of the tooth holes 111, the originally continuous structure becomes a discontinuous structure, which is similar to the tearable connection between two stamps, making it easier to be pulled apart. In some other embodiments, the weakening structure 11 can also be constructed as a structure such as local thinning. In short, any structure that can be easily pulled apart when the battery cell swells can be applied to the present disclosure, and no further details will be given.

[0039] In some embodiments, the sampling body 2 can be fixedly connected to the insulator 1, so that the insulator 1 can fix and support the sampling body 2. Figure 3 As shown, the insulator 1 is provided with mounting holes 12 for mounting with the characteristic structures on the battery cells at intervals along the length direction. Usually, the electrode terminals of multiple battery cells 200 in the battery module are connected in series using a busbar 300. Then the insulator 1 is installed on the busbar 300 or other supporting structures. At this time, the characteristic structures on the battery cells can be, for example, guide pillars and other structures provided on the busbar 300 that match the mounting holes 12, which play a role in positioning and fixing the installation of the insulator 1.

[0040] According to the second aspect of the embodiment of the present disclosure, Figure 4 As shown, a battery is also disclosed. The battery includes a plurality of stacked battery cells 200 and a voltage sampling structure 100 in any one of the above-mentioned embodiments. Among them, a bus 300 can be used to connect the electrode terminals of the plurality of stacked battery cells 200 in series. The first sampling part 21 of the sampling body 2 is connected to the bus 300, and the second sampling part 22 is connected to the shell of the battery cell. After the battery cells are grouped, a CMU is set on one side thereof, and the sampling body 2 is arranged on the other side. The sampling body 2 transfers the potential on the other side of the battery cell to the shell of the battery cell, and the CMU obtains the voltage of each battery cell by collecting the potential on the shell of the battery cell.

[0041] According to a third aspect of the embodiment of the present disclosure, there is also provided a vehicle, comprising the above-mentioned battery and having all its beneficial effects, which will not be described in detail here.

[0042] In the above detailed description, reference is made to the accompanying drawings, which illustrate specific aspects of the present disclosure that can be practiced by way of illustration. In this regard, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating directions or representing positional relationships, can be used with reference to the orientation of the described figures. Since the components of the described device can be positioned in a plurality of different orientations, directional terms can be used for illustrative purposes rather than restrictive. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concepts of the present disclosure. Therefore, the following detailed description should not be considered in a limiting sense.

[0043] It should be understood that, unless otherwise specifically noted, the features of some embodiments of the various present disclosures described herein may be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more; similarly, "at least one of . . . " includes any one of the related listed items and any combination of any two or more.

[0044] It should be understood that, unless otherwise clearly specified and limited, the terms "joining", "attaching", "installing", "connecting", "connecting", "fixing" and the like used in the embodiments of the present disclosure should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0045] In addition, the term "above" used in relation to a component, element or material layer formed "above" or located "above" a surface may be used herein to indicate that the component, element or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements or layers are arranged between the surface and the component, element or material layer. However, the term "above" used in relation to a component, element or material layer formed "above" or located "above" a surface may also optionally have a specific meaning: the component, element or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, such as in direct contact with the surface.

[0046] Although terms such as "first", "second" and "third" can be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, component, region, layer or section from another component, component, region, layer or section. Therefore, without departing from the teachings of each example, the first component, component, region, layer or section mentioned in the examples described herein may also be referred to as the second component, component, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may expressly or implicitly include at least one of the features. In the description herein, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] It should be understood that spatially relative terms such as "above", "upper", "below", and "lower" are used herein to describe the relationship of one element to another element shown in the figures. In addition to the orientation depicted in the drawings, such spatially relative terms are also intended to include different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the element described as being "above" or "upper" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" includes both upper and lower orientations. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

[0048] In addition, the word "exemplary" is used herein to indicate serving as an example, instance, or diagram. Any aspect or design described as "exemplary" in this article is not necessarily understood to be advantageous compared to other aspects or designs. On the contrary, the use of the word exemplary is intended to present concepts in a specific way. As used herein, the term "or" is intended to represent an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to represent any one of the natural inclusive arrangements. That is, if X applies A; X applies B; or X applies both A and B, "X applies A or B" is satisfied under any of the aforementioned examples. In addition, unless otherwise specified or clearly pointed to a singular form from the context, the articles "one" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0049] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art after reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if the structure is not equivalent to the disclosed structure. In addition, although specific features of the present disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and beneficial to any given or specific application. In addition, with respect to "including", "having", "having", "having", or variations thereof used in a specific embodiment or claim, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0050] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0051] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A voltage sampling structure, characterized in that: The invention comprises an insulator and a sampling body arranged on the insulator, wherein the sampling body comprises: a first sampling part for connecting with an electrode terminal of a battery cell, a second sampling part for connecting with a shell of the battery cell, and a connecting part connected between the first sampling part and the second sampling part, wherein the sampling body is integrally stamped.

2. The voltage sampling structure according to claim 1, characterized in that: The first sampling portion includes: a first mounting section for connecting to the insulator, a first bending section connected to the first mounting section and bent in a direction away from the insulator, and a first sampling section connected to the first bending section for connecting to the electrode terminal of the battery cell; and / or The second sampling portion includes: a second installation section for connecting to the insulator, a second bending section connected to the second installation section and bent away from the insulator, and a second sampling section connected to the second bending section and connected to the housing of the battery cell.

3. The voltage sampling structure according to claim 1, characterized in that: The first sampling portion, the connecting portion and the second sampling portion are of an integrated structure.

4. The voltage sampling structure according to claim 1, characterized in that: The connecting portion is a fuse that can be blown when the current flowing through the sampling body is greater than a preset value.

5. The voltage sampling structure according to claim 1, characterized in that: The insulator is in the shape of a long strip, the number of the sampling bodies is multiple, and the multiple sampling bodies are arranged at intervals along the length direction of the insulator.

6. The voltage sampling structure according to claim 5, characterized in that: A weakening structure is provided at a portion of the insulator located between two adjacent sampling bodies.

7. The voltage sampling structure according to claim 6, characterized in that: The weakening structure includes a plurality of tooth holes arranged at intervals along a width direction of the insulator.

8. The voltage sampling structure according to claim 5, characterized in that: The sampling body is fixedly arranged on the insulator, and / or the insulator is provided with mounting holes spaced apart along the length direction for mounting and cooperating with the characteristic structure on the battery cell.

9. A battery, characterized in that: The invention comprises a plurality of stacked battery cells and the voltage sampling structure according to any one of claims 1 to 8.

10. A vehicle, characterized in that: A battery comprising the battery of claim 9.

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