Acquisition assembly and battery pack

Abstract

The utility model relates to the technical field of electric energy storage, and particularly discloses an acquisition assembly and a battery pack, comprising a plurality of conductive patches used for being attached to each battery cell, an interface terminal used for being connected with an acquisition controller, and a plurality of conductive circuits, wherein the conductive circuits and the conductive patches are arranged in a one-to-one correspondence manner, and the conductive circuits are used for electrically connecting the corresponding conductive patches to the interface terminals; the interface terminal is located between the head conductive patch and the tail conductive patch, so that the distance between the interface terminal and any conductive patch is smaller than the distance between the head conductive patch and the tail conductive patch. According to the acquisition assembly and the battery pack provided by the utility model, the problem of low data acquisition precision caused by overlarge line loss of the conductive patch at the far end of the interface terminal can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric energy storage, especially to a collection assembly and battery pack. BACKGROUND

[0002] In the prior art, a collection assembly is usually used to collect voltage, temperature and other parameter information of each battery cell in a battery pack.

[0003] Referring to Figure 1 The collection assembly usually includes a plurality of conductive patches 501 for attaching to the pole or the conductive part of the gasket of each battery cell to obtain the parameter information, an interface terminal 502 for connecting with a collection controller, and a plurality of conductive lines 5031 corresponding to each conductive patch 501 and electrically connecting the corresponding conductive patch 501 to the interface terminal 502.

[0004] The interface terminal 502 of the existing collection assembly is usually arranged at the end position, and the distance from each conductive patch 501 to the interface terminal 502 is quite different. Therefore, the length of each conductive line 5031 is also quite different. Specifically, the closer to the interface terminal 502, the more and denser the conductive lines 5031; the farther from the interface terminal 502, the fewer and sparser the conductive lines 5031.

[0005] The arrangement of the interface terminal 502 at the end position causes the following problems:

[0006] The conductive patch 501 close to the interface terminal 502 (hereinafter referred to as "proximal patch 501a") corresponds to a conductive line 5031 (hereinafter referred to as "proximal line 5031a") with a relatively short length and a small internal resistance;

[0007] The conductive patch 501 far from the interface terminal 502 (hereinafter referred to as "distal patch 501b") corresponds to a conductive line 5031 (hereinafter referred to as "distal line 5031b") with a length much larger than that of the proximal line 5031a, so the internal resistance of the distal line 5031b is also much larger than that of the proximal line 5031a;

[0008] Due to the large internal resistance of the distal line 5031b corresponding to the distal patch 501b, the data collection accuracy of the distal patch 501b is relatively low.

[0009] Therefore, it is necessary to improve the existing collection assembly to solve the problem of low data collection accuracy caused by excessive line loss of the conductive patch far from the interface terminal of the collection assembly.

[0010] The above information disclosed in this Background section is only for the purpose of enhancing the understanding of the background of the disclosure, and therefore, can include information that does not form the prior art that is already known to those of ordinary skill in the art. Utility Model Content

[0011] One purpose of the present utility model is to provide a kind of acquisition assembly and battery pack, can effectively solve the problem that the data acquisition accuracy is low due to the excessive line loss of the conductive patch of interface terminal far end.

[0012] To achieve the above purpose, on the one hand, the present utility model provides an acquisition assembly, comprising a plurality of conductive patches, an interface terminal for connecting with an acquisition controller, and a plurality of conductive lines;Wherein, each of the conductive lines and each of the conductive patches is one-to-one correspondence, for electrically connecting the corresponding conductive patch to the interface terminal;

[0013] The interface terminal is located between the first and last two conductive patches, so that the distance dimension of the interface terminal to any of the conductive patches is less than the distance dimension between the first and last two conductive patches.

[0014] Optionally, each of the conductive patches is symmetrically arranged relative to the interface terminal, so that the interface terminal is located at the middle position between the first and last two conductive patches.

[0015] Optionally, each of the conductive lines is uniformly distributed on both sides of the interface terminal.

[0016] Optionally, the conductive line includes a horizontal segment extending from the interface terminal to align with the corresponding conductive patch, and a vertical segment connecting the horizontal segment to the corresponding conductive patch.

[0017] Optionally, further comprising:

[0018] The circuit board, each of the conductive lines is located in the circuit board, and the circuit board is provided with a patch area corresponding to each of the conductive patches and a welding area corresponding to the interface terminal.

[0019] Optionally, the plug-in interface of the interface terminal is parallel to the width direction of the circuit board, and faces away from each of the conductive patches.

[0020] On the other hand, a battery pack is provided, comprising:

[0021] Battery box, the battery box is provided with a battery compartment and a control compartment;

[0022] Battery module, the battery module is located in the battery compartment;

[0023] Acquisition controller, the acquisition controller is located in the control compartment, and

[0024] The battery module is electrically connected to the collection controller through the collection assembly.

[0025] A plug-in wire is provided, one end of which is electrically connected to the collection controller, and the other end is plug-in connected to the interface terminal of the collection assembly.

[0026] Optionally, the number of the battery compartments is at least two, and a wire slot for accommodating the plug-in wire is arranged between the two adjacent battery compartments.

[0027] Optionally, a terminal avoiding window is arranged at the middle position of the wire slot for the interface terminal to pass through.

[0028] Optionally, the battery module comprises a plurality of battery cells, and the pole of each battery cell is located on the surface of the battery cell close to the wire slot, and the collection assembly is located on the side of the pole close to the wire slot.

[0029] The beneficial effects of the utility model lie in that the interface terminal is arranged between the first and last conductive patches, so that the distance between the interface terminal and any conductive patch is smaller than the distance between the first and last conductive patches, thereby shortening the distance between the interface terminal and the distal patch. Shortening the length of the distal line can reduce the line resistance of the distal line, thereby improving the data collection accuracy of the distal patch.

[0030] Therefore, the collection assembly and the battery pack provided by the utility model can solve the problem of low data collection accuracy caused by excessive line loss of the conductive patch at the distal end of the interface terminal. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor under the premise of the drawings.

[0032] Figure 1 The structure schematic view of the prior collection assembly provided for the background art;

[0033] Figure 2 The structure schematic view of the battery pack provided by the embodiment;

[0034] Figure 3 The structure schematic view of the collection assembly provided by the embodiment.

[0035] In the drawings:

[0036] 1. battery box; 101. battery compartment; 102. control compartment; 103. wire slot; 104. terminal avoiding window;

[0037] 2. battery module;

[0038] 3. acquisition controller;

[0039] 4. plug-in wire;

[0040] 5. acquisition assembly; 501. conductive patch; 501a. proximal patch; 501b. distal patch; 502. interface terminal; 503. circuit board; 5031. conductive circuit; 5031a. proximal circuit; 5031b. distal circuit; 5031c. transverse segment; 5031d. longitudinal segment. DETAILED DESCRIPTION

[0041] In the present application, the term “embodiment” means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The term “embodiment” appearing at various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0042] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0043] In the description of the present application, the phrase “and / or” is a description of the logical relationship between objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character “ / ” in this paper generally represents that the associated objects before and after are a kind of “or” logical relationship.

[0044] In the present application, terms such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary or order relationship between the entities or operations.

[0045] In the absence of more restrictions, in the utility model, the "including", "containing", "having" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the elements described, so that the process, method or product including a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include the elements inherent in such process, method or product.

[0046] The same as the understanding in the "Examination Guidelines", in the utility model, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the utility model, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly specified.

[0047] In the description of the embodiments of the utility model, the spatial-related expressions used, such as "center", "vertical", "horizontal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. The indicated orientation or position relationship is based on the orientation or position relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiment of the utility model or for the reader to understand, and does not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, therefore it cannot be understood as a limitation on the embodiments of the utility model.

[0048] Unless otherwise explicitly specified or limited, in the description of the embodiments of the utility model, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be understood broadly. For example, the "connection" can be fixed connection, or detachable connection, or integrated setting; it can be mechanical connection, or electrical connection, or communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art to which the utility model belongs, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0049] The utility model provides a kind of acquisition assembly and battery pack, it is applicable to the battery management system needing high-precision data acquisition, such as new energy automobile power battery etc., it can solve the problem that the data acquisition precision is relatively low due to the fact that the conductive patch of interface terminal far end is too large in line loss.

[0050] Referring to Figure 2 The battery pack provided by the embodiment comprises a battery box 1, a battery module 2, a collection controller 3, a plug-in cable 4 and a collection assembly 5.

[0051] The battery box 1 is provided with a battery compartment 101 and a control compartment 102, the battery module 2 is located in the battery compartment 101, and the collection controller 3 is located in the control compartment 102. The battery module 2 is electrically connected to the collection controller 3 through the collection assembly 5 and the plug-in cable 4.

[0052] In the embodiment, referring to Figure 3 The collection assembly 5 comprises a plurality of conductive patches 501 for being attached to the conductive parts such as the pole or the pad of each battery cell, an interface terminal 502 for being connected to the collection controller 3 and a plurality of conductive lines 5031. Each conductive line 5031 is arranged in one-to-one correspondence with each conductive patch 501 and electrically connects the corresponding conductive patch 501 to the interface terminal 502.

[0053] The interface terminal 502 is located between the first and last conductive patches 501, so that the distance from the interface terminal 502 to any conductive patch 501 is smaller than the distance between the first and last conductive patches 501.

[0054] The collection assembly 5 and the battery pack provided by the embodiment set the interface terminal 502 between the first and last conductive patches 501, so that the distance from the interface terminal 502 to any conductive patch 501 is smaller than the distance between the first and last conductive patches 501, thereby shortening the distance from the interface terminal 502 to the far-end patch 501b. Shortening the length of the far-end line 5031b can reduce the line resistance of the far-end line 5031b, thereby improving the data collection accuracy of the far-end patch 501b.

[0055] Therefore, the collection assembly 5 and the battery pack provided by the embodiment can solve the problem of low data collection accuracy caused by excessive line loss of the conductive patch 501 far from the interface terminal 502.

[0056] Optionally, each conductive patch 501 is symmetrically arranged relative to the interface terminal 502, so that the interface terminal 502 is located at the middle position between the first and last conductive patches 501. The symmetric arrangement of the conductive patches 501 relative to the interface terminal 502 makes the distance from the interface terminal 502 to each conductive patch 501 more uniform, further optimizing the data collection accuracy and reducing the data collection deviation of the conductive patches 501 at different positions.

[0057] Further, the conductive lines 5031 are evenly distributed on both sides of the interface terminal 502. All the conductive lines 5031 close to the interface terminal 502 are connected to the interface terminal 502 from the same side of the interface terminal 502, so that the conductive lines 5031 on the wiring side of the interface terminal 502 are too dense, resulting in a large size and low compactness of the collection assembly, which is not conducive to improving the volume energy density of the battery.

[0058] Therefore, the interface terminal 502 is centrally arranged, which is also conducive to evenly distributing the conductive lines 5031 on both sides of the interface terminal 502, thereby solving the problem of too much concentration of the conductive lines 5031 close to the interface terminal 502, resulting in a large size and low compactness.

[0059] Optionally, the conductive lines 5031 include a transverse segment 5031c extending from the interface terminal 502 to align with the corresponding conductive patch 501, and a longitudinal segment 5031d connecting the transverse segment 5031c to the corresponding conductive patch 501. The wiring is in a horizontal and vertical manner, which can greatly reduce the manufacturing difficulty of the circuit board, thereby simplifying the manufacturing process and reducing the manufacturing cost.

[0060] In the embodiment, the collection assembly 5 further includes a circuit board 503, the conductive lines 5031 are located in the circuit board 503, and the circuit board 503 is provided with a patch area corresponding to each of the conductive patches 501 and a welding area corresponding to the interface terminal 502.

[0061] The interface terminal 502 and each of the conductive patches 501 are welded and fixed to the circuit board, so that the entire collection assembly 5 becomes a hardware whole. Compared with the method of connecting the interface terminal 502 and the conductive patches 501 with scattered wires, using the circuit board to connect the interface terminal 502 and the conductive patches 501 can make the collection assembly 5 more regular and beautiful, and avoid the situation that the wires are messy, difficult to arrange, and even torn off.

[0062] Further, the circuit board 503 is a flexible circuit board. On the one hand, the flexible circuit board is small in size and weight, which is conducive to improving the energy density of the battery pack. On the other hand, the flexible circuit board is soft and easy to deform, which can not only put the collection assembly 5 into a small space to improve the space utilization rate of the battery pack, but also is conducive to tightly fixing each conductive patch 501 on each battery cell. Even if the battery cell is slightly displaced and vibrates, the flexible circuit board can also adaptively deform to avoid the conductive patch 501 from falling off.

[0063] In some other embodiments, the FFC flat cable can also be used as the conductive line 5031. The FFC flat cable has the advantages of light weight, good bending performance, etc. Moreover, compared with the flexible circuit board, the FFC flat cable can be directly purchased on the market without the need of early design and production, thereby reducing the inventory pressure.

[0064] In the embodiment, the number of the battery compartments 101 is at least two, and a flat cable slot 103 for accommodating the plug-in flat cable 4 is arranged between two adjacent battery compartments 101. A terminal avoiding window 104 is arranged at the middle position of the flat cable slot 103, and the interface terminal 502 passes through the terminal avoiding window 104. One end of the plug-in flat cable 4 is electrically connected to the acquisition controller 3, and the other end is plug-in connected to the interface terminal 502 of the acquisition assembly 5.

[0065] Optionally, the insertion direction of the interface terminal 502 is parallel to the width direction of the circuit board 503, and the interface terminal 502 faces away from the conductive patches 501. In this way, the interface terminal 502 is arranged upward during the installation of the acquisition assembly 5, so as to facilitate the plug-in operation of the plug-in flat cable 4 in the up-down direction.

[0066] The number of the battery compartments 101 is set to be at least two, and the flat cable slot 103 is arranged between two adjacent battery compartments 101, which is beneficial to the reasonable distribution of the internal space of the battery pack and improves the space utilization. In addition, the design of the flat cable slot 103 and the terminal avoiding window 104 makes the plug-in flat cable 4 and the interface terminal 502 have fixed installation positions in the battery pack, reduces the activity range of the plug-in flat cable 4 in the battery pack, and thus enhances the structural stability of the battery pack.

[0067] In the embodiment, the battery module 2 includes a plurality of battery cells, and the pole of each battery cell is located on the surface of the battery cell close to the flat cable slot 103. The acquisition assembly 5 is located on the side of the pole close to the flat cable slot 103, so as to arrange the interface terminal 502 in the avoiding window 104.

[0068] Further, considering that the width dimension of the flat cable slot 103 is limited and the space for the plug-in operation in the transverse direction is insufficient, in the embodiment, the insertion direction of the interface terminal 502 is parallel to the width direction of the acquisition assembly 5, and the interface terminal 502 faces away from the conductive patches 501, so as to perform the plug-in operation between the interface terminal 502 and the plug-in flat cable 4 in the up-down direction, thereby reducing the requirement for the space in the transverse direction.

[0069] In summary, the acquisition assembly 5 and the battery pack provided in the embodiment have the following advantages:

[0070] ① Improve data acquisition accuracy: by setting the interface terminal 502 between the first and last conductive patch 501, the distance from the interface terminal 502 to the distal patch 501b is shortened, thereby reducing the internal resistance of the distal line 5031b and improving data acquisition accuracy;

[0071] ② Reduce data acquisition deviation caused by internal resistance difference: the conductive patches 501 are symmetrically arranged about the interface terminal 502, so that the distance from the interface terminal 502 to each conductive patch 501 is more uniform, further optimizing data acquisition accuracy and reducing data acquisition deviation of conductive patches 501 at different positions;

[0072] ③ Improve structural compactness: the conductive lines 5031 are uniformly distributed on both sides of the interface terminal 502, solving the problem of excessive concentration of conductive lines 5031 near the interface terminal 502, resulting in large size and low structural compactness;

[0073] ④ Improve battery pack structural stability: by setting the wire slot 103 and terminal avoidance window 104, the installation position of the plug-in wire 4 and the interface terminal 502 is fixed, reducing the range of movement and enhancing the structural stability of the battery pack;

[0074] ⑤ Optimize space allocation and heat dispersion: setting two battery compartments 101 and wire slots 103 is conducive to the rational allocation of internal space of the battery pack and improves space utilization.

[0075] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of the present application, they do not limit the scope of the patent protection of the present application. Any equivalent structure or equivalent process substitution or modification based on the essential concept of the present application, using the content described in the specification and drawings, as well as the direct or indirect implementation of the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A collection assembly comprising: The interface terminal (502) is located between the first and last conductive patches (501), so that the distance from the interface terminal (502) to any of the conductive patches (501) is smaller than the distance between the first and last conductive patches (501). Each of the conductive patches (501) is symmetrically arranged relative to the interface terminal (502), so that the interface terminal (502) is located at a middle position between the first and last conductive patches (501).

2. The collection assembly of claim 1, wherein, Each of the conductive lines (5031) is uniformly distributed on both sides of the interface terminal (502).

3. The collection assembly of claim 2, wherein, The conductive line (5031) includes a transverse segment (5031c) extending from the interface terminal (502) to align with the corresponding conductive patch (501), and a longitudinal segment (5031d) connecting the transverse segment (5031c) to the corresponding conductive patch (501).

4. The collection assembly of claim 3, wherein, Further comprising:

5. The collection assembly of claim 1, wherein, The line board (503) is provided with a patch area corresponding to each of the conductive patches (501), and a welding area corresponding to the interface terminal (502). The insertion interface of the interface terminal (502) is parallel to the width direction of the line board (503), and faces away from each of the conductive patches (501).

6. The collection assembly of claim 5, wherein, Comprising:

7. A battery pack, characterized by, A battery box (1) is provided with a battery compartment (101) and a control compartment (102); A battery module (2) is located in the battery compartment (101); A collection controller (3) is located in the control compartment (102); and, The battery module (2) is electrically connected to the collection controller (3) through the collection assembly (5) according to any one of claims 1-6; A plug-in cable (4) is electrically connected to the collection controller (3) at one end, and is plug-in connected to the interface terminal (502) of the collection assembly (5) at the other end. The number of battery compartments (101) is at least two, and a cable slot (103) accommodating the plug-in cable (4) is provided between the two adjacent battery compartments (101).

8. The battery pack of claim 7, wherein, The middle position of the cable slot (103) is provided with a terminal avoiding window (104) for the interface terminal (502) to pass through.

9. The battery pack of claim 8, wherein, The battery module (2) includes a plurality of battery cells, and the pole of each battery cell is located on the surface of the battery cell close to the cable slot (103), and the collection assembly (5) is located on the side of the pole close to the cable slot (103).

10. The battery pack of claim 8, wherein, ​

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