Voltage acquisition assembly and battery pack

Abstract

The utility model relates to the technical field of battery structures, and discloses a voltage acquisition assembly and a battery pack, the voltage acquisition assembly comprises an FPC board body and a connecting part, and the FPC board body is provided with a first connecting part; the connecting part is suitable for being electrically connected with an electrode, a second connecting part is arranged on the connecting part, and the second connecting part is movably connected with the first connecting part and can be detached so as to be electrically connected with the FPC board body; the problem of high maintenance cost of the battery pack can be solved or improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery structure, in particular to a voltage acquisition assembly and a battery pack. BACKGROUND

[0002] With the development of new energy, the battery system packaging technology is also constantly improving; the automation and modularization of battery system packaging gradually become the mainstream of development; and the battery pack in the battery system is the most important. At present, the power battery pack collects the voltage and other information of each single battery to monitor the battery pack, so as to ensure the healthy use of the battery.

[0003] In the related art, the structure of the battery voltage sampling assembly is generally as follows: one end of a nickel sheet is welded with a bar sheet, the other end of the nickel sheet is welded with an FPC (Flexible Printed Circuit) through reflow soldering, and the welding part of the nickel sheet and the FPC is glued and solidified, so that the voltage information of the battery can be led out through the bar sheet, the nickel sheet and the FPC and collected by the battery management system.

[0004] However, since the reflow soldering process is adopted between the nickel sheet and the FPC, and the welding part of the FPC and the nickel sheet is glued and solidified, when the battery monomer or the voltage sampling assembly is damaged, the glue at the welding part of the nickel sheet and the FPC needs to be melted, and then the solder paste of the reflow soldering needs to be melted, so as to separate the nickel sheet and the FPC, and then the nickel sheet of the new battery monomer needs to be re-welded. In the above replacement process, the circuit on the FPC board body is easily damaged, the replacement process of the nickel sheet is complicated, and the risk of high scrap rate of the FPC exists. Therefore, in most cases, the whole FPC is directly replaced, which greatly increases the maintenance cost. Utility model content

[0005] Therefore, the present application provides a voltage acquisition assembly and a battery pack to solve or improve the problem of high maintenance cost of the battery pack.

[0006] On the one hand, the present application provides a voltage acquisition assembly, comprising an FPC board body and a connecting component, the FPC board body is provided with a first connecting part; the connecting component is adapted to be electrically connected with an electrode, the connecting component is provided with a second connecting part, the second connecting part is movably connected with the first connecting part and can be detached to be electrically connected with the FPC board body.

[0007] Beneficial effects: the FPC board body and the connecting component are movably connected through the first connecting part and the second connecting part, and can be detached. When the battery monomer or the connecting component is damaged, the separation operation of the connecting component and the FPC board body can be simplified, and the circuit on the FPC board body is prevented from being damaged, so as to reduce the maintenance cost.

[0008] In an alternative embodiment, the first connecting part is a socket body, the second connecting part is a plug, and the plug is capable of being clamped in the socket body, and the socket body and the plug are both capable of conducting electricity.

[0009] In an alternative embodiment, the socket body is provided with a plug slot and a fixing slot, the plug slot is in communication with the fixing slot, the plug is capable of entering the fixing slot through the plug slot, and the fixing slot is provided with a limiting part; wherein, the limiting part is capable of limiting the plug in a first state to prevent the plug from sliding out of the plug slot, and the limiting part is capable of allowing the plug to slide out of the plug slot in a second state.

[0010] In an alternative embodiment, the limiting part comprises a deformation block, a first limiting block and a second limiting block, one end of the deformation block is connected with the socket body, the first limiting block is arranged on the deformation block, and the second limiting block is arranged on the inner bottom surface of the fixing slot, and a gap is arranged between the first limiting block and the second limiting block; wherein, the plug is a plug piece, the plug piece is provided with a limiting slot, the plug piece is capable of passing through the gap between the first limiting block and the second limiting block, and a part of the first limiting block and / or a part of the second limiting block is capable of entering the limiting slot to limit the plug.

[0011] In an alternative embodiment, the part of the first limiting block close to the second limiting block is rounded, and / or the part of the second limiting block close to the first limiting block is rounded.

[0012] In an alternative embodiment, the connecting part comprises a nickel sheet and a bar sheet, the nickel sheet is connected with the bar sheet, the second connecting part is arranged on the nickel sheet, and the bar sheet is suitable for being connected with an electrode.

[0013] In an alternative embodiment, the nickel sheet is welded with the bar sheet, and / or the bar sheet is suitable for being welded with an electrode.

[0014] In an alternative embodiment, the socket body comprises a clamping seat and a bottom plate, the clamping seat is connected with the FPC plate body, the clamping seat is provided with a fixing leg, and the clamping seat is capable of conducting electricity; the bottom plate is provided with a connecting hole, the connecting hole corresponds to the fixing leg one by one, and the FPC plate body is provided with a via hole at the position corresponding to the fixing leg; wherein, the fixing leg passes through the via hole and is connected with the connecting hole.

[0015] In an alternative embodiment, a glue block is arranged in the fixing slot to fix the plug.

[0016] In another aspect, the application also provides a battery pack comprising a plurality of battery cells and the voltage collection assembly as in any one of the preceding embodiments, wherein the connecting component is electrically connected with the battery cell electrode.

[0017] Beneficial effects: because the battery pack comprises the voltage collection assembly, the same effects as the voltage collection assembly are achieved, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the specific embodiments or the related art, the drawings needed to be used in the specific embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a front view of a voltage collection assembly according to an embodiment of the application;

[0020] Figure 2 It is a front view of a voltage collection assembly according to an embodiment of the application; Figure 1 It is an enlarged view of A in FIG. 4;

[0021] Figure 3 It is a front view of a voltage collection assembly according to an embodiment of the application; Figure 2 It is a sectional view of B-B in FIG. 5;

[0022] Figure 4 It is an exploded view of a voltage collection assembly according to an embodiment of the application. Figure 2

[0023] Legend of reference signs:

[0024] 1, FPC board body; 2, connecting component;

[0025] 11, first connecting part; 12, via hole;

[0026] 111, plug-in seat body;

[0027] 1111, plug-in slot, 1112, fixing slot; 1113, limiting part; 1114, clamping seat; 1115, bottom plate; 1116, glue block;

[0028] 11131, deformation block; 11132, first limiting block; 11133, second limiting block;

[0029] 11141, fixing foot; 11151, connecting hole;

[0030] 21, second connecting part; 22, nickel sheet; 23, Ba sheet;

[0031] ​211. Connector;

[0032] 2111, Limiting groove. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In related technologies, the structure of the battery voltage sampling component is usually as follows: one end of the nickel sheet is soldered to the electrode plate, and the other end of the nickel sheet is soldered to the FPC (Flexible Printed Circuit) by reflow soldering. Adhesive is applied and cured at the solder joint between the nickel sheet and the FPC, so that the battery voltage information can be extracted through the electrode plate, nickel sheet and FPC and collected by the battery management system.

[0035] However, because the nickel sheet and FPC are connected by reflow soldering, and the solder joint between the FPC and the nickel sheet is cured with adhesive, when a battery cell or voltage sampling component is damaged, it is usually necessary to melt the adhesive at the solder joint between the nickel sheet and the FPC, and then melt the reflow solder paste to separate the nickel sheet from the FPC, and then resolder the nickel sheet of the new battery cell. In the above replacement process, the circuitry on the FPC board is easily damaged. The nickel sheet replacement process is cumbersome, and there is a high risk of the FPC being scrapped. Therefore, in most cases, the entire FPC is replaced directly, which greatly increases the maintenance cost.

[0036] Therefore, this application provides a voltage acquisition component and a battery pack that can solve or improve the problem of high battery pack maintenance costs.

[0037] The following is combined with Figures 1 to 4 This describes an embodiment of the present application.

[0038] According to embodiments of this application, in one aspect, a voltage acquisition component is provided, such as... Figure 1 and Figure 2 As shown, it includes an FPC board 1 and a connecting component 2. The FPC board 1 is provided with a first connecting part 11. The connecting component 2 is adapted to be electrically connected to an electrode. The connecting component 2 is provided with a second connecting part 21. The second connecting part 21 is movably connected to the first connecting part 11 and can be detached to be electrically connected to the FPC board 1.

[0039] It should be noted that the FPC plate body 1 can be provided with a plurality of first connecting parts 11, which are connected with the second connecting parts 21 on the plurality of connecting components 2 respectively to transmit the voltage measurement information of the plurality of battery monomers, and the electrodes can be the positive and negative electrodes of the battery monomers; specifically, the FPC plate body 1 can be provided with 12 first connecting parts 11, and the number of the connecting components 2 is 12, which are electrically connected one by one with the 12 first connecting parts 11; the number of the first connecting parts 11 and the connecting components 2 can be selected and adjusted according to the actual voltage measurement demand, which is not limited here.

[0040] It should be further noted that the active connection and the detachable connection between the second connecting part 21 and the first connecting part 11 mean that the connection can be detached without the help of a hot melting head, that is, only the relative position of the parts changes in the detachment process, and there is no chemical reaction or phase change (such as melting).

[0041] It should be noted that the above-mentioned "electrical connection" means a connection that can transmit electrical signals, which can be connected by direct welding.

[0042] Specifically, the first connecting part 11 and the second connecting part 21 can be any detachable connection structure, such as a matched plug 211 and a plug-in slot 1111, etc.; the FPC plate body 1 has a circuit for connecting with the battery management system to transmit the voltage signal.

[0043] In this embodiment, as shown in Figure 1 and Figure 2 , the FPC plate body 1 and the connecting component 2 are actively connected and detachable through the first connecting part 11 and the second connecting part 21, which can simplify the separation operation of the connecting component 2 and the FPC plate body 1 when the battery monomer is damaged or the connecting component 2 is damaged, and avoid damaging the circuit on the FPC plate body 1, so as to reduce the maintenance cost and reduce the complaints of customers.

[0044] In one embodiment, as shown in Figure 2 , the first connecting part 11 is a plug-in seat body 111, as shown in Figure 3 or Figure 4 , the second connecting part 21 is a plug 211, the plug 211 can be clamped in the plug-in seat body 111, and the plug-in seat body 111 and the plug 211 can both conduct electricity to realize the transmission of the voltage signal.

[0045] It should be noted that the plug-in seat body 111 and the plug 211 can both conduct electricity, which means that the plug-in seat body 111 is embedded with a conductive medium (such as a wire, a conductive sheet, etc.) inside, or the plug-in seat body 111 is made of a conductive material; the plug 211 is embedded with a conductive medium (such as a wire, a conductive sheet, etc.) inside, or the plug 211 is made of a conductive material.

[0046] Specifically, the plug-in seat body 111 and the plug-in head 211 can be existing products in the market, and the specific structural form of the plug-in seat body 111 and the plug-in head 211 is not limited as long as the plug-in can be performed and the transmission of electrical signals can be achieved.

[0047] In this embodiment, as shown in the figure, Figures 1 to 3 The plug-in seat body 111 is a first connecting part 11 arranged on the FPC plate body 1, which not only facilitates the connection of the plug-in seat body 111 and the FPC plate body 1, but also can be directly composed of the plug-in head 211 in the form of a sheet body, thereby simplifying the structure and facilitating the production.

[0048] In one embodiment, as shown in the figure, Figure 4 The plug-in seat body 111 is provided with a plug-in slot 1111 and a fixing slot 1112, the plug-in slot 1111 is communicated with the fixing slot 1112, the plug-in head 211 can pass through the plug-in slot 1111 and enter the fixing slot 1112, and the fixing slot 1112 is provided with a limiting part 1113; wherein the limiting part 1113 is in a first state, which can limit the plug-in head 211 to prevent the plug-in head 211 from sliding out of the plug-in slot 1111, and the limiting part 1113 is in a second state, and the plug-in head 211 can slide out of the plug-in slot 1111.

[0049] It should be noted that the limiting part 1113 can be an elastic compression sheet, or a block that can be clamped with the plug-in seat body 111 and can compress or limit the plug-in head 211 in other forms, as long as it can limit the plug-in head 211. As for the connection form of the limiting part 1113 and the plug-in seat body 111, it is not limited, and can be selectively adjusted according to the specific application scene demand and installation convenience.

[0050] Specifically, the shapes of the plug-in slot 1111 and the fixing slot 1112 can be any shape such as square, circular, oval, etc., and the shape of the plug-in slot 1111 is generally matched with the outer shape of the plug-in head 211, which can limit the plug-in head 211 to a certain extent.

[0051] In this embodiment, as shown in the figure, Figure 4 The plug-in head 211 is inserted into the fixing slot 1112 through the plug-in slot 1111, and the plug-in head 211 is limited by the limiting part 1113 in the first state in the fixing slot 1112 to prevent the plug-in head 211 from sliding out of the plug-in slot 1111; and the plug-in head 211 can slide out of the plug-in slot 1111 through the limiting part 1113 in the second state, which is simple in structure design and convenient to operate.

[0052] In one embodiment, as shown in the figure, Figure 3As shown, the limiting part 1113 includes a deformation block 11131, a first limiting block 11132 and a second limiting block 11133, one end of the deformation block 11131 is connected with the plug-in seat body 111; the first limiting block 11132 is arranged on the deformation block 11131; the second limiting block 11133 is arranged on the inner bottom surface of the fixed groove 1112, and a gap is arranged between the first limiting block 11132 and the second limiting block 11133; wherein the plug-in head 211 is a plug-in sheet, a limiting groove 2111 is arranged on the plug-in sheet, the plug-in sheet can pass through between the first limiting block 11132 and the second limiting block 11133, and a part of the first limiting block 11132 and / or a part of the second limiting block 11133 can enter the limiting groove 2111 to limit the plug-in head 211.

[0053] It is worth noting that the size A of the gap in the "gap arranged between the first limiting block 11132 and the second limiting block 11133" needs to meet: 0≤A<B, wherein B is the depth of the limiting groove 2111, that is, the thickness of the plug-in head 211.

[0054] It should be noted that the deformation block 11131 refers to a sheet body with a certain elastic deformation amount, of course, the thickness of the deformation block 11131 can be selected and set according to actual needs.

[0055] Specifically, one end of the deformation block 11131 is a fixed end, which can be connected with the inner side wall surface of the fixed groove 1112, and the connection mode is generally one-piece forming, the first limiting block 11132 can be arranged on the end portion of the deformation block 11131 away from the fixed end, or can be arranged on the part of the deformation block 11131 away from the fixed end, of course, the first limiting block 11132 and the deformation block 11131 can also be one-piece forming structure.

[0056] In the specific working process, for example, Figure 3As shown, when the connector needs to be installed in the connector body 111, the first limiting block 11132 is moved away from the second limiting block 11133 by hand or with the help of an auxiliary tool (such as a hook), and the deformation block 11131 is deformed. At this time, the limiting part 1113 formed by the first limiting block 11132, the second limiting block 11133, and the deformation block 11131 is in a second state. Then, the connector is inserted into the fixing groove 1112 through the connector groove 1111, and the limiting groove 2111 is aligned with the first limiting block 11132 and the second limiting block 11133. The position blocks 11133 overlap, at least a portion of the second limiting block 11133 enters the limiting groove 2111, and then the first limiting block 11132 is released. The first limiting block 11132 is reset under the elastic force of the deformation block 11131, and at least a portion of the first limiting block 11132 enters the limiting groove 2111. At this time, the limiting part 1113 formed by the deformation block 11131, the first limiting block 11132, and the second limiting block 11133 is in the first state, which limits the plug-in piece to prevent the limiting piece from sliding out of the plug-in groove 1111.

[0057] When it is necessary to remove the connector from the connector body 111, the first limiting block 11132 is moved away from the second limiting block 11133 by hand or with the help of an auxiliary tool (such as a hook), and the deformation block 11131 is deformed. At this time, the limiting part 1113 formed by the first limiting block 11132, the second limiting block 11133 and the deformation block 11131 is in the second state. Then the connector is pulled out from the connector slot 1111, and the first limiting block 11132 is released. The first limiting block 11132 is reset under the elastic force of the deformation block 11131.

[0058] In this embodiment, such as Figure 3 As shown, the reciprocating deformation of the deformation block 11131 drives the first limiting block 11132 to reciprocate in the direction away from or close to the second limiting block 11133, so that the first limiting block 11132 and the second limiting block 11133 limit or unlock the position of the plug-in piece. The structure is simple and the operation is convenient.

[0059] In one embodiment, such as Figure 3 As shown, the portion of the first limiting block 11132 near the second limiting block 11133 is rounded; and / or, the portion of the second limiting block 11133 near the first limiting block 11132 is rounded.

[0060] It is worth noting that the size of the rounded corner can be adaptively adjusted according to factors such as the thickness of the connector piece, the thickness of the first limiting block 11132, and the thickness of the second limiting block 11133. The key is to ensure that under a certain pushing and pulling force, the connector piece can, under the guidance of the rounded corner, squeeze the first limiting block 11132 to move away from the second limiting block 11133, causing the deformation block 11131 to deform and allowing the connector piece to be inserted between the first limiting block 11132 and the second limiting block 11133. This eliminates the need to use hands or auxiliary tools (such as hooks) to move the first limiting block 11132 away from the second limiting block 11133, simplifying the operation and improving maintenance efficiency.

[0061] In one embodiment, such as Figure 2 As shown, the connecting component 2 includes a nickel sheet 22 and a bar sheet 23. The nickel sheet 22 and the bar sheet 23 are connected. A second connecting part 21 is disposed on the nickel sheet 22. The bar sheet 23 is adapted to be connected to an electrode. Specifically, the nickel sheet 22 and the bar sheet 23 are welded by reflow soldering; and / or, the bar sheet 23 is adapted to be welded to an electrode by laser welding.

[0062] In this embodiment, the connecting component 2 includes a nickel sheet 22 and a bar sheet 23, which is the most commonly used structure in existing products. The product is mature and has stable performance.

[0063] In one embodiment, such as Figure 4 As shown, the connector body 111 includes a card holder 1114 and a base plate 1115. The card holder 1114 is connected to the FPC board 1 by welding. The card holder 1114 is provided with a fixing foot 11141 and is conductive. The base plate 1115 is provided with a connection hole 11151, which corresponds one-to-one with the fixing foot 11141. The FPC board 1 is provided with a through hole 12 at the corresponding position of the fixing foot 11141. The fixing foot 11141 passes through the through hole 12 and is connected to the connection hole 11151 by melting the fixing foot 11141.

[0064] In this embodiment, the card holder 1114 is connected to the FPC board 1, and then connected to the base plate 1115 located on the other side of the FPC board 1 via the fixing foot 11141. This can enhance the connection strength between the plug holder 111 and the FPC board 1 and reduce the risk of damage during disassembly.

[0065] In one embodiment, such as Figure 4 As shown, a rubber block 1116 is fused into the fixing groove 1112 to fix the connector 211.

[0066] It should be noted that the "melting and setting" refers to pouring the glue block 1116 into the fixing groove 1112 in a liquid state or a flowable state by heating and then solidifying to fix the plug-in connector 211.

[0067] In this embodiment, the plug-in connector 211 and the plug-in connector body 111 can be integrated, the connection strength can be enhanced, the plug-in connector 211 can be prevented from falling off, and the connection reliability can be improved by melting and setting the glue block 1116 in the fixing groove 1112.

[0068] According to the embodiment of the present application, on the other hand, a battery pack is provided, which comprises a plurality of battery cells and the voltage collection assembly according to any one of the above embodiments. The connecting component 2 is electrically connected with the electrode of the battery cell.

[0069] In this embodiment, because the battery pack comprises the voltage collection assembly, the same effects as the voltage collection assembly are achieved, and thus will not be described herein.

[0070] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A voltage acquisition assembly comprising: The utility model relates to a kind of FPC board body (1), the FPC board body (1) is provided with first connecting part (11);AndConnecting component (2) is suitable for being electrically connected with electrode, the connecting component (2) is provided with second connecting part (21), the second connecting part (21) is movably connected with the first connecting part (11), and can be detached, to be electrically connected with the FPC board body (1);The connecting component (2) includes nickel sheet (22) and bar sheet (23), the nickel sheet (22) is connected with the bar sheet (23), the second connecting part (21) is arranged on the nickel sheet (22), and the bar sheet (23) is suitable for being connected with electrode. The first connecting part (11) is a plug-in seat body (111), the second connecting part (21) is a plug-in head (211), the plug-in head (211) can be clamped in the plug-in seat body (111), and the plug-in seat body (111) and the plug-in head (211) can conduct electricity. The plug-in seat body (111) is provided with a plug-in slot (1111) and a fixing slot (1112), the plug-in slot (1111) is communicated with the fixing slot (1112), the plug-in head (211) can pass through the plug-in slot (1111) and enter the fixing slot (1112), and the fixing slot (1112) is provided with a limiting portion (1113). The limiting portion (1113) is located in a first state, can limit the plug-in head (211) to prevent the plug-in head (211) from sliding out of the plug-in slot (1111), and the limiting portion (1113) is located in a second state, and the plug-in head (211) can slide out of the plug-in slot (1111). The limiting portion (1113) includes:

2. The voltage harvesting assembly of claim 1, wherein, A deformation block (11131) is connected to one end of the plug-in seat body (111); 3. The voltage harvesting assembly of claim 2, wherein, A first limiting block (11132) is arranged on the deformation block (11131); A second limiting block (11133) is arranged on the inner bottom surface of the fixing slot (1112), and a gap is provided between the first limiting block (11132) and the second limiting block (11133); 4. The voltage harvesting assembly of claim 3, wherein, The plug-in head (211) is a plug-in sheet, the plug-in sheet is provided with a limiting slot (2111), the plug-in sheet can pass through between the first limiting block (11132) and the second limiting block (11133), and a part of the first limiting block (11132) and / or a part of the second limiting block (11133) can enter the limiting slot (2111) to limit the plug-in head (211). The part of the first limiting block (11132) close to the second limiting block (11133) is rounded; and / or, the part of the second limiting block (11133) close to the first limiting block (11132) is rounded. The nickel sheet (22) and the bar sheet (23) are welded; and / or, the bar sheet (23) is suitable for being welded with electrode. The plug-in seat body (111) includes: ​ 5. The voltage harvesting assembly of claim 4, wherein, ​ 6. The voltage harvesting assembly of claim 1, wherein, ​ 7. The voltage harvesting assembly of any one of claims 2-5, wherein, ​ A card seat (1114) is connected with the FPC plate body (1), the card seat (1114) is provided with a fixing foot (11141) on it, and the card seat (1114) can conduct electricity; A bottom plate (1115) is provided with a connecting hole (11151) on it, the connecting hole (11151) corresponds to the fixing foot (11141) one by one, and the FPC plate body (1) is provided with a via hole (12) at a corresponding part of the fixing foot (11141), wherein, between the corresponding fixing foot (11141), via hole (12) and connecting hole (11151), the fixing foot (11141) passes through the via hole (12) and is connected with the connecting hole (11151).

8. The voltage harvesting assembly of any one of claims 3-5, wherein, The fixing groove (1112) is provided with a glue block (1116) therein, so as to fix the plug (211).

9. A battery pack characterized by comprising: Comprise: Battery monomer, the battery monomer is provided with a plurality of; And The voltage acquisition assembly according to any one of claims 1-8, the connecting component (2) is electrically connected with the electrode of the battery monomer.

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