Battery signal acquisition terminal, CCS assembly with battery signal acquisition terminal and battery pack with battery signal acquisition terminal

Abstract

The utility model relates to the technical field of battery signal acquisition, in particular to a battery signal acquisition terminal, a CCS assembly with the battery signal acquisition terminal and a battery pack with the battery signal acquisition terminal. The battery signal acquisition terminal comprises a metal sheet, the metal sheet comprises a body part and a bending part extending from the first end part of the body part, and the metal sheet is provided with an opening formed at the joint of the bending part and the body part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery signal acquisition, and particularly relates to a battery signal acquisition terminal, a CCS assembly with the same and a battery pack. BACKGROUND

[0002] Patent document No. CN221407408U (patent document 1) discloses a terminal component for collecting battery signals, and the conductive sheet (metal sheet) of the terminal component has a clamping protrusion (bent portion) formed by bending. In implementation, the initial positioning of the terminal at the mounting position of the busbar can be achieved by embedding the clamping protrusion into the opening portion of the busbar, and then the welding of the metal sheet and the busbar is facilitated. However, when the metal sheet is pressed on the surface of the busbar by a pressing device to pre-implement welding, the clamping protrusion originally embedded in the opening portion (clamping groove) of the busbar is likely to be tilted outward due to the pressing action, and thus is detached from the opening portion, resulting in poor positioning effect and burrs on the surface of the conductive busbar.

[0003] In addition, especially in the case of using a laser welding process, in order to ensure the welding strength of the metal sheet and the busbar, the metal sheet needs to be pressed onto the busbar by a pressing device to make the surface of the metal sheet better adhere to the surface of the busbar, and then welding is implemented. If the adhesion of the surface of the metal sheet to the surface of the busbar is poor and there is a gap, the welding strength will be significantly reduced, and the terminal is likely to be accidentally detached from the busbar during use. However, the inventors found that in the case where the metal sheet is pressed onto the busbar by the pressing device, the metal sheet is difficult to adhere well to the surface of the busbar due to the influence of the shape of the opening portion and the connection between the first bent arm and the metal sheet, and thus the welding quality is not high. SUMMARY

[0004] To solve at least one of the above technical problems, the present application proposes a battery signal acquisition terminal, a CCS assembly with the same and a battery pack.

[0005] In a first aspect, a battery signal acquisition terminal is provided, comprising a metal sheet, the metal sheet comprising a body portion and a bent portion extending from a first end portion of the body portion, the metal sheet having an opening formed at a connection between the bent portion and the body portion.

[0006] In some possible implementations, the bent portion comprises a first arm, a second arm and a third arm extending in sequence from the first end portion, the first arm and the third arm being opposite to each other, and the opening occupies a part of the first arm and a part of the first end portion.

[0007] In some possible implementations, the third arm comprises:

[0008] The first part extends from the second arm;

[0009] The second portion extends from the first end of the first portion in a curved manner relative to the first portion, and the second end of the second portion defines the end of the metal sheet, wherein at least a portion of the second end is further away from the first arm than the second portion in the relative directions of the first arm and the second arm.

[0010] In some possible implementations, the second portion extends from the first end in a manner that gradually moves away from the first arm and the second arm.

[0011] In some possible implementations, the body portion includes a straight portion extending in a first direction and a second direction perpendicular to each other and defining the first end, wherein the first direction is the relative direction of the first arm and the third arm.

[0012] In some possible implementations, the opening includes a slit extending along the second direction.

[0013] In some possible implementations, the opening includes a plurality of holes spaced apart along the second direction.

[0014] Secondly, a CCS component is provided, including:

[0015] A busbar having a third surface and an opening recessed from the third surface;

[0016] As described in the first aspect, the battery signal acquisition terminal, wherein the bent portion is embedded in the opening, and the body portion is welded to the third surface.

[0017] In some possible implementations, the flat portion is abutted against and welded to the third surface.

[0018] Thirdly, a battery pack is proposed, including the CCS component as described in the second aspect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0020] Figure 1 This is a schematic diagram of a portion of the CCS component provided in an embodiment of this application.

[0021] Figure 2 yes Figure 1 A schematic diagram of the busbar.

[0022] Figure 3 is Figure 1 is a perspective view of a first battery signal collection terminal in the battery signal collection terminal.

[0023] Figure 4 is Figure 3 is a side view of the battery signal collection terminal.

[0024] Figure 5 is Figure 1 is a perspective view of a second battery signal collection terminal in the battery signal collection terminal.

[0025] Figure 6 is Figure 5 is a side view of the battery signal collection terminal.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] DR1 - first direction, DR2 - second direction, DR3 - third direction;

[0028] 1000 - CCS assembly;

[0029] 100 - battery signal collection terminal, 200 - bus bar;

[0030] 100R - first battery signal collection terminal, 100L - second battery signal collection terminal;

[0031] 10 - metal sheet, 10a - third end portion;

[0032] 20 - electric wire, 30 - temperature sensor

[0033] 1 - body portion, 1a - first end portion;

[0034] 11 - flat portion, 11b - second end portion, 11c - first surface, 11d - second surface;

[0035] 12 - electric wire crimping portion;

[0036] 2 - bent portion;

[0037] 21 - first arm;

[0038] 22 - second arm;

[0039] 23 - third arm, 231 - first portion, 231a - first end, 232 - second portion, 232a - second end, 232b - sharp corner;

[0040] 3 - slit;

[0041] 4 - third surface;

[0042] 5 - opening portion, 51 - first inner wall surface, 52 - second inner wall surface. DETAILED DESCRIPTION

[0043] For the purposes of the present application, the technical solutions and advantages will be more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of protection of the present application. It can be understood that some technical means of various embodiments described herein can be mutually replaced or combined without conflict.

[0044] In the description of the present application, if there are terms "first", "second", etc., they are only used to distinguish the described objects, and do not have any order or technical meaning. Therefore, the objects defined with "first", "second", etc. can explicitly or implicitly include one or more of the objects, and for example, the term "first element" itself does not mean the existence of "second element", and the term "second element" itself does not mean the existence of "first element". In addition, "one" or "an" and the like similar words do not represent quantity limitation, but represent the existence of at least one, and "multiple" represents no less than two.

[0045] In the description of the present application, the terms "include", "have" indicate the existence of the described features, numbers, operations, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, numbers, operations, elements and / or their combinations.

[0046] In the description of the present application, the reference to "one embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized.

[0047] Figure 1A part of a CCS (Cells Contact System) assembly 1000 provided by an embodiment of the application is schematically shown, which includes a busbar 200 and a first battery signal acquisition terminal 100R and a second battery signal acquisition terminal 100L welded to the busbar 200. The first battery signal acquisition terminal 100R (hereinafter, sometimes referred to as terminal 100R) can be used to acquire a voltage signal of a battery pack, in particular, a battery cell in the battery pack, and the second battery signal acquisition terminal 100L (hereinafter, sometimes referred to as terminal 100L) can be used to acquire a temperature signal of the battery pack, in particular, the battery cell in the battery pack.

[0048] In the following description, when it is not necessary to distinguish the first battery signal acquisition terminal 100R and the second battery signal acquisition terminal 100L, they are collectively referred to as a battery signal acquisition terminal 100 or a terminal 100.

[0049] The busbar 200 can be an aluminum bar or a copper bar, which is used to electrically connect adjacent battery cells in a battery pack to achieve electrical grouping of the battery cells. The busbar 200 has a flat third surface 4 and an opposite surface opposite to the third surface 4 and recessed from the third surface 4, which is not visible in the figure due to the angle of view. In use, the opposite surface of the busbar 200 can be attached to a battery pack body to achieve a large-area thermal contact with the battery pack body, and the third surface 4 faces away from the battery pack body. Figure 1

[0050] The busbar 200 also has an opening portion 5 recessed from the third surface 4, which can be a through-hole structure or a groove structure with a closed bottom. The opening portion 5 is formed in a rectangular shape and has a first inner wall surface 51 and a second inner wall surface 52 oppositely arranged in a first direction DR1.

[0051] Please refer to Figures 1 to 6 The terminal 100 includes a metal sheet 10, which can be a nickel sheet, and the metal sheet 10 includes a body portion 1 welded to the third surface 4 of the busbar 200 and a bent portion 2 extending from a first end portion 1a of the body portion 1 and embedded in the opening portion 5 of the busbar 200. In assembly, the bent portion 2 of the terminal 100 can be embedded in the opening portion 5 of the busbar 200 to achieve complete positioning of the assembly of the terminal 100 and the busbar 200, and then the body portion 1 is welded to the third surface 4 of the busbar 200.

[0052] The body portion 1 includes a flat portion 11 and a wire crimping portion 12.

[0053] ​The flat portion 11 is formed in a rectangular shape extending in a first direction DR1 and a second direction DR2 perpendicular to each other, and defines the aforementioned first end portion 1a of the body portion 1, i.e., the flat portion 11 has the aforementioned first end portion 1a. Moreover, the flat portion 11 has a second end portion 1 lb disposed opposite the first end portion 1a in the first direction DR1, and has a first surface 1 lc and a second surface 1 Id disposed opposite each other in a thickness direction thereof, i.e., a third direction DR3 perpendicular to the first direction DR1 and the second direction DR2. The first surface 1 lc is welded to the third surface 4 in a manner to abut against the third surface 4.

[0054] The wire crimping portion 12 is integrally connected to the second end portion 1 lb of the flat portion 11.

[0055] As for the terminal 100R, the wire crimping portion 12 has two pairs of clamping jaws arranged apart in the first direction DR1, each pair of clamping jaws being disposed opposite each other in the first direction DR1. By deforming each pair of clamping jaws by applying a pressing force thereto in a manner to approach each other, an end portion of the wire 20 for transmitting a signal is crimped and fixed between each pair of clamping jaws. Moreover, the pair of clamping jaws closer to the flat portion 11 can crimp a stripped core of the wire 20, while the other pair of clamping jaws farther from the flat portion 11 can crimp an insulating cover of the wire 20.

[0056] As for the terminal 100L, the wire crimping portion 12 is formed in a cylindrical shape. The wire 20 with the temperature sensor 30 (thermistor) attached thereto is inserted into a hole cavity of the cylindrical wire crimping portion 12, and by deforming the wire crimping portion 12 by applying a pressing force thereto in a manner to approach the inside of the cylindrical wire crimping portion 12, the temperature sensor 30 is crimped and fixed to the inside of the cylindrical wire crimping portion 12, whereby the temperature sensor 30 is mechanically fixed to the metal sheet 10. In this way, the temperature of the battery pack, particularly the battery cell, is transmitted to the temperature sensor 30 via the bus bar 200 and the metal sheet 10, so that the temperature of the battery pack can be measured. In addition, the temperature sensor 30 should be encapsulated by an insulating resin, so that the electrical device inside the temperature sensor 30 is electrically isolated from the metal sheet 10.

[0057] The bent portion 2 is formed in a substantially U-shape, and includes a first arm 21, a second arm 22, and a third arm 23 successively extending from the first end portion 1a of the body portion 1 (also the end portion of the flat portion 11), the first arm 21 and the third arm 23 being opposite each other in the first direction DR1, and the third arm 23 defining one end portion of the metal sheet 10, i.e., a third end portion 10a. The first arm 21 is substantially perpendicular to the flat portion 11 of the body portion 1, and the third arm 23 is substantially parallel to the flat portion 11 of the body portion 1.

[0058] The third arm 23 includes a first portion 231 and a second portion 232. The first portion 231 extends substantially perpendicularly from the second arm 22. The second portion 232 extends from a first end 231a of the first portion 231 (i.e. an end of the first portion 231 distal to the second arm 22) in a manner curved with respect to the first portion 231, and a second end 232a of the second portion 232 defines a third end portion 10a of the metal sheet 10. Moreover, at least a portion of the second end 232a is further away from the first arm 21 than the second portion 232 in the opposite direction of the first arm 21 and the second arm 22, i.e. the first direction DR1. Therefore, when the bent portion 2 of the terminal 100 is embedded in the opening portion 5 of the busbar 200, the second portion 232 (particularly the second end 232a) of the third arm 23 abuts against the second inner wall surface 52 of the opening portion 5, and thus, when the body portion 1 is pressed against the third surface 4 of the busbar 200, the bent portion 2, particularly the third arm 23, can be inhibited from running out of the opening portion 5.

[0059] In the present embodiment, the second portion 232 extends from the first end 231a of the first portion 231 in a manner curved with respect to the first portion 231 away from the first arm 21 and the second arm 22, and the second portion 232 is formed as a relatively long straight structure in the second direction DR2.

[0060] In addition, the portion of the second end 232a that is furthest away from the first arm 21 in the first direction DR1 is formed as a sharp corner 232b defined by two intersecting and parallel faces to the second direction DR2, such that a tip of the sharp corner 232b is in a linear shape extending along the second direction DR2. Moreover, the tip points away from the first arm 21, and the tip points in the first direction DR1. By such a design, when the bent portion 2 of the terminal 100 is embedded in the opening portion 5 of the busbar 200, the tip of the sharp corner 232b abuts and slightly bites into the second inner wall surface 52 of the opening portion 5 in a line contact manner, thereby improving the engagement strength of the second portion 232 of the third arm 23 with the second inner wall surface 52, and thus improving the engagement strength of the bent portion 2 with the opening portion 5.

[0061] The metal sheet 10 can be obtained based on blanking (and bending) processing of a thin sheet metal, and the sharp corner 232b on the third arm 23 is obtained by blanking of the thin sheet metal, i.e. the sharp corner 232b corresponds to a blanking boundary of the thin sheet metal.

[0062] The size of the second portion 232 is significantly smaller than the size of the first portion 231, and based on this, when the bending portion 2 is embedded into the opening portion 5, the first portion 231 also abuts against the second inner wall surface 52, and due to the reverse abutment of the second inner wall surface 52 against the first portion 231 and the second portion 232, the third arm 23 generates elastic deformation close to the first arm 21. In this way, it helps to further improve the engagement strength of the third arm 23 with the second inner wall surface 52.

[0063] In other embodiments, the metal sheet 10 does not have the wire crimping portion 12, but is welded to the circuit board with the temperature sensor 30 through the scheme of the patent document CN221407408 U.

[0064] In some embodiments, the CCS assembly 1000 includes a plurality of busbars 200, and at least one terminal 100R and / or at least one terminal 100L is welded on each busbar 200.

[0065] Please refer again to Figure 4 For the first battery signal acquisition assembly 100L, when viewed in the first direction DR1, the third arm 23 is located entirely on the side of the first surface 11c of the flat portion 11. Through such a design, when the bending portion 2 of the metal sheet 10 is fitted into the opening portion 5 of the busbar 200, the third arm 23, especially the second portion 232 of the third arm 23, can easily enter the opening portion 5 completely, thereby reliably abutting against the second inner wall surface 52 of the opening portion 5.

[0066] In particular in the case of using a laser welding process, in order to ensure the welding strength of the flat portion 11 of the body portion 1 to the busbar 200, it is necessary to press the flat portion 11 onto the busbar 200 using a pressing device, so that the first surface 11c of the flat portion 11 is better fitted to the third surface 4 of the busbar 200, and then welding is performed. If the fitting degree of the first surface 11c to the third surface 4 is poor and there is a gap, the welding strength will be significantly reduced, and the terminal 100 is likely to accidentally fall off the busbar 200 during use.

[0067] However, the inventors found that in the case where the pressing device presses the flat portion 11 of the terminal 100 onto the busbar 200, due to the influence of the mouth edge of the opening portion 5 and the shape of the connection between the first arm 21 of the bending portion 2 and the body portion 1, the first end portion 1a of the body portion 1 is difficult to be well fitted to the third surface 4 of the busbar 200, and therefore, the part of the flat portion 11 close to the first end portion 1a cannot be well fitted to the third surface 4 of the busbar 200. In view of this, the embodiments of the present application solve this problem through the following design:

[0068] Please refer back to Figure 3 and Figure 5Referring to Figure 1 A slit 3 extending along the second direction DR2 is formed at the connection between the first arm 21 of the bending portion 2 and the flat portion 11. By providing the slit 3 at the connection between the first arm 21 and the flat portion 11, the structural strength of the metal sheet 10 at the site is reduced, so that when the pressing device presses the flat portion 11 of the terminal 100 to the bus bar 200, the first end portion la of the body portion 1 is more easily deformed towards the third surface 4 to better fit to the third surface 4 of the bus bar 200, so that the entire first surface lib of the flat portion 11 can better fit to the third surface 4 of the bus bar 200, thereby helping to improve the welding strength between the terminal 100 and the bus bar 200.

[0069] In this embodiment, the slit 3 occupies a part of the first end portion la and a part of the first arm 21. By such a design, when the pressing device presses the flat portion 11 of the terminal 100 to the bus bar 200, the first end portion la of the body portion 1 is more easily deformed towards the third surface 4. In manufacturing, the slit 3 can be obtained by punching out a part of the thin metal sheet material at the first end portion la and a part of the thin metal sheet material at the root of the first arm 21 in a punch slit manner before bending the first arm 21.

[0070] In some embodiments, a plurality of the aforementioned slits 3 can be provided, and the plurality of slits 3 extend along the second direction DR2 and are spaced apart along the second direction DR2.

[0071] In some embodiments, the aforementioned slit 3 can be replaced by a circular hole. For example, a plurality of circular holes pass through the metal sheet 10 at the connection between the flat portion 11 and the first arm 21, and are arranged spaced apart along the second direction DR2. Obviously, the slit 3 and the circular hole can both be referred to as an opening.

[0072] It can also be understood that when the pressing device presses the flat portion 11 of the terminal 100 to the bus bar 200, compared with the case where no slit 3 or hole is provided at the connection between the body portion 1 and the first arm 21, the design of this embodiment makes the bending portion 2, especially the third arm 23, less likely to be outwardly buckled relative to the opening portion 5, i.e., the third arm 23 is better inhibited from moving away from the opening portion 5.

[0073] It can be understood that the aforementioned terminal 100 can also be welded to the surface of other objects (such as the end clamping plate of the battery pack) of the battery device to collect relevant signals of the battery device via the other object.

[0074] The embodiments of the present application also provide a battery pack comprising a plurality of battery cells and the aforementioned CCS assembly 1000.

Claims

1. A battery signal collection terminal comprising a metal sheet including a body portion and a bent portion extending from a first end portion of the body portion, characterized by, The metal sheet has an opening formed at a connection of the bent portion and the body portion.

2. The battery signal acquisition terminal of claim 1, wherein, The bent portion includes a first arm, a second arm, and a third arm successively extending from the first end portion, the first arm and the third arm are opposite to each other, and the opening occupies a part of the first arm and a part of the first end portion.

3. The battery signal acquisition terminal of claim 2, wherein, The third arm includes: a first portion extending from the second arm; a second portion extending from a first end of the first portion in a manner bent relative to the first portion, and a second end of the second portion defines an end of the metal sheet, at least a part of the second end is farther away from the first arm than the second portion in the opposite direction of the first arm and the second arm.

4. The battery signal acquisition terminal of claim 3, wherein, The second portion extends from the first end in a manner gradually farther away from the first arm and the second arm.

5. The battery signal acquisition terminal according to any one of claims 2 to 4, characterized in that, The body portion includes a flat portion extending in a first direction and a second direction perpendicular to each other and defining the first end portion, wherein the first direction is the opposite direction of the first arm and the third arm.

6. The battery signal acquisition terminal of claim 5, wherein, The opening includes a slit extending along the second direction.

7. The battery signal acquisition terminal of claim 5, wherein, The opening includes a plurality of holes arranged apart along the second direction.

8. A CCS assembly characterized in that, Comprising: a busbar having a third surface and an opening portion recessed from the third surface; The battery signal acquisition terminal of any one of claims 1 to 7, wherein the bent portion is embedded in the opening portion, and the body portion is welded to the third surface.

9. A CCS assembly characterized in that, Comprising: a busbar having a third surface and an opening portion recessed from the third surface; The battery signal acquisition terminal of any one of claims 5 to 7, wherein the bent portion is embedded in the opening portion, and the body portion is welded to the third surface, and the flat portion is abutted and welded to the third surface.

10. A battery pack characterized by comprising: A CCS assembly as claimed in claim 8 or 9.

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