Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, and belongs to the technical field of batteries, the battery pack comprises a signal acquisition board, the signal acquisition board has a length direction and a width direction which are intersected, the signal acquisition board comprises a board body, a terminal connecting part and an acquisition circuit, the terminal connecting part is connected with the board body along the width direction, and the acquisition circuit comprises a first section and a fusing section, the first section is embedded in the board body, and the fusing section is embedded in the terminal connecting part and is in conductive connection with the first section. According to the utility model, the fusing section of the acquisition circuit is arranged in the terminal connecting part, so that the fusing section is far away from the first section, and the phenomenon that the interval between the first section and the fusing section of the adjacent acquisition circuit is increased due to the fact that the fusing section is arranged in the board body is avoided, so that the fusing section is prevented from occupying more width dimensions of the board body, and the utilization rate of raw materials can be effectively improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery pack and an electrical device. Background Art

[0002] Power batteries usually use FPC (Flexible Printed Circuit) acquisition boards to collect the voltage and temperature data of the single cells of the power battery to obtain the working status of the power battery. In the FPC acquisition board, the fuse is usually integrated into the acquisition circuit on the FPC acquisition board body by etching to provide a fuse protection function. However, due to the high temperature at the fuse, in order to ensure the normal operation of the FPC acquisition board, it is necessary to increase the interval between the fuse and the adjacent circuit, which easily causes the overall width of the FPC acquisition board to increase, reducing the utilization rate of the FPC raw materials. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery pack, aiming to solve the problem that the existing fuse is arranged adjacent to the collection line, which increases the overall width of the FPC collection board and reduces the utilization rate of the FPC raw materials; another purpose of the embodiment of the present application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of the present application includes a signal acquisition board, wherein the signal acquisition board has an intersecting length direction and a width direction, and includes:

[0005] plate body;

[0006] A terminal connecting portion connected to the plate body along the width direction;

[0007] The acquisition circuit comprises a first section and a fuse section, wherein the first section is embedded in the plate body, the fuse section is embedded in the terminal connecting portion, and the fuse section is conductively connected to the first section.

[0008] In some embodiments,

[0009] The terminal connecting portion comprises a body and an extension arm, wherein the extension arm is connected to the plate body, and one end of the extension arm away from the plate body is connected to the body;

[0010] The acquisition circuit also includes a second section, at least part of which is embedded in the extension arm; one end of the second section is conductively connected to the first section, and the other end of the second section away from the first section is conductively connected to the fuse section, and the fuse section is embedded in the body.

[0011] In some embodiments,

[0012] Along the width direction, there is a gap between the main body and the plate body;

[0013] The terminal connecting portion has a groove, the opening of the groove faces the plate body along the width direction, the extension arm is connected to the body to enclose the groove, and the groove is communicated with the gap.

[0014] In some embodiments, the extension arm comprises:

[0015] A third section is connected to the plate body; along the width direction, the third section extends in a direction away from the plate body; at least a portion of the third section is spaced apart from the body along the length direction;

[0016] The fourth section is connected to one end of the third section away from the plate body, and one end of the fourth section away from the third section is connected to the main body. The fourth section extends along the length direction, and the third section, the fourth section and the main body form the groove.

[0017] In some embodiments, the signal acquisition board includes a plurality of the terminal connection parts and a plurality of the acquisition circuits, the plurality of the terminal connection parts are arranged at intervals along the length direction, the first sections of the plurality of the acquisition circuits are arranged at intervals along the width direction and extend along the length direction, and the fuse section of each of the acquisition circuits is embedded in one of the terminal connection parts.

[0018] In some embodiments, at least one of the terminal connecting parts has two fuse sections embedded therein, and the two fuse sections are spaced apart along the width direction within the terminal connecting part.

[0019] In some embodiments, the signal acquisition board also includes multiple first acquisition terminals and at least one second acquisition terminal, each of the terminal connecting parts is connected to one of the first acquisition terminals, and the fuse section in the terminal connecting part is conductively connected to the first acquisition terminal; each of the terminal connecting parts embedded with two of the fuse sections is also connected to one of the second acquisition terminals, and one of the fuse sections in the terminal connecting part is conductively connected to the second acquisition terminal.

[0020] In some embodiments, a plurality of the terminal connection portions spaced apart along the length direction form a signal acquisition component, and the signal acquisition board includes at least two of the signal acquisition components, and at least two of the signal acquisition components are arranged on both sides of the board body along the width direction and are respectively connected to the board body.

[0021] In some embodiments, the third section is integrally connected to the plate body, the third section is integrally connected to the fourth section, and the fourth section is integrally connected to the main body.

[0022] Accordingly, an electrical device described in an embodiment of the present application includes a battery pack as described in any one of the aforementioned embodiments.

[0023] Beneficial effect: Compared with the prior art, a battery pack according to an embodiment of the present application includes a signal acquisition board, which has an intersecting length direction and width direction, and includes a board body, a terminal connection part and an acquisition circuit, and the terminal connection part is connected to the board body along the width direction. The acquisition circuit includes a first section and a fuse section, the first section is embedded in the board body, the fuse section is embedded in the terminal connection part, and the fuse section is conductively connected to the first section. The present application sets the fuse section of the acquisition circuit in the terminal connection part, so that the fuse section is away from the first section, avoiding the increase of the interval between the first section and the fuse section of the adjacent acquisition circuit in the width direction due to the setting of the fuse section in the board body, thereby avoiding the fuse section occupying more of the width dimension of the board body, which can effectively improve the utilization rate of raw materials.

[0024] Compared with the prior art, an electric device according to an embodiment of the present application includes a battery pack as described in any one of the above embodiments. It is understandable that the electric device according to the embodiment of the present application can have all the technical features and corresponding beneficial effects of the above battery pack, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of a signal acquisition board according to an embodiment of the present application;

[0027] Figure 2 yes Figure 1 A magnified view of part A;

[0028] Figure 3 yes Figure 1 A magnified view of part B;

[0029] Figure 4 is a schematic diagram of the structure of the acquisition circuit of an embodiment of the present application;

[0030] Figure 5 yes Figure 4 Magnified view of part C.

[0031] Figure numerals: 1, signal acquisition board; 11, board body; 12, terminal connection part; 121, main body; 122, extension arm; 1221, third section; 1222, fourth section; 123, groove; 13, acquisition circuit; 131, first section; 132, fuse section; 133, second section; 14, gap; 15, first acquisition terminal; 16, second acquisition terminal; 17, signal acquisition component; Y, length direction; X, width direction. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0033] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.

[0034] It should also be noted that in the drawings of the present application, the arrow marked X indicates the width direction X, and the arrow marked Y indicates the length direction Y. In the embodiment of the present application, the width direction X and the length direction Y are introduced to facilitate the description of the structural position relationship of the various components of the signal acquisition board of the battery pack, thereby facilitating the understanding of its structure. In the embodiment of the present application, the width direction X and the length direction Y are preferably perpendicular to each other.

[0035] In the production and operation of power battery packs, there is a risk that short circuits of components will generate large currents, endangering operators or other electronic devices. The FPC acquisition board can integrate the fuse section (fuse) into the acquisition circuit by etching to provide a fuse protection function. However, due to the small wire diameter of the etched fuse (the wire diameter is usually 0.12-0.17mm in the FPC acquisition board), the heat is obvious during normal operation. Therefore, when wiring the acquisition circuit, the distance between the fuse section and the adjacent acquisition circuit (width direction X) needs to be kept above 1mm, and the distance from the edge of the FPC board needs to be kept above 3mm. Therefore, when the fuse section and other acquisition circuits are arranged side by side on the board of the FPC acquisition board, the line needs to be adjusted frequently during wiring, which increases the workload and occupies more board space. Therefore, the board size is larger and the utilization rate of the raw materials of the FPC acquisition board is not high.

[0036] In view of this, an embodiment of the present application provides a battery pack, which aims to solve the problem that the FPC acquisition board has a large board size and a low raw material utilization rate.

[0037] Please refer to Figure 1-Figure 5 The embodiment of the present application provides a battery pack, including a signal acquisition board 1, the signal acquisition board 1 has a length direction Y and a width direction X intersecting each other, and includes a board body 11, a terminal connection portion 12 and an acquisition circuit 13. The terminal connection portion 12 is connected to the board body 11 along the width direction X, and the acquisition circuit 13 includes a first section 131 and a fuse section 132, the first section 131 is embedded in the board body 11, the fuse section 132 is embedded in the terminal connection portion 12, and the fuse section 132 is conductively connected to the first section 131.

[0038] In the embodiment of the present application, the fuse section 132 of the acquisition circuit 13 is arranged in the terminal connection part 12, so that the fuse section 132 is far away from the first section 131, so as to avoid the first section 131 of the adjacent acquisition circuit 13 and the fuse section 132 increasing the interval along the width direction X due to the fuse section 132 being arranged in the board body 11, thereby avoiding the fuse section 132 occupying more width dimensions of the board body 11, which can effectively improve the utilization rate of raw materials.

[0039] Specifically, in the embodiment of the present application, the signal acquisition board 1 is a flexible circuit board, which is used to be arranged on one side of the battery pack and connected to each single cell respectively, and is used to collect the temperature signal and voltage signal of the single cell. In order to play a good protective role when a component short-circuits and generates a large current, which endangers the operator or other electronic devices and avoids serious consequences, a fuse section 132 is usually set in the acquisition circuit 13, and the circuit is blown in time when the component short-circuits, thereby improving the safety of the battery pack. In the embodiment of the present application, the fuse section 132 is set in the terminal connection part 12, and the first section 131 is connected to the fuse section 132 and set in the board body 11. At this time, the distance between the first section 131 of the acquisition circuit 13 and the edge of the board body 11 can be controlled to be smaller, and the width of the board body 11 can be reduced accordingly, thereby improving the utilization rate of raw materials. At the same time, in the embodiment of the present application, the fuse section 132 is arranged in the terminal connection part 12, and the terminal connection part 12 is connected to one side of the board body 11 for connecting the acquisition terminal. In order to provide a larger contact area with the acquisition terminal, the terminal connection part 12 is usually in a rectangular or cube shape. Therefore, the width of the corresponding terminal connection part 12 is sufficient to accommodate a fuse section 132, and the distance between the fuse section 132 and the edge of the terminal connection part 12 can meet the wiring requirement of more than 3mm. At the same time, there are fewer lines in the terminal connection part 12, which can effectively reduce the interference between the fuse section 132 and other lines, so as not to affect the routing of the fuse section 132, and ensure the protection of the acquisition line 13 by the fuse section 132. And transferring the fuse section 132 to the terminal connection part 12 can avoid the fuse section 132 occupying the width of the board body 11, and effectively improve the raw material utilization rate of the signal acquisition board 1.

[0040] Please refer to Figure 1-Figure 5 In some embodiments, the terminal connecting portion 12 includes a main body 121 and an extension arm 122, the extension arm 122 is connected to the board body 11, and one end of the extension arm 122 away from the board body 11 is connected to the main body 121; the acquisition circuit 13 also includes a second section 133, at least part of the second section 133 is embedded in the extension arm 122; one end of the second section 133 is conductively connected to the first section 131, and the other end of the second section 133 away from the first section 131 is conductively connected to the fuse section 132, and the fuse section 132 is embedded in the main body 121.

[0041] In the embodiment of the present application, by providing an extension arm 122, the terminal connecting part 12 can be separated from the board body 11, thereby increasing the degree of freedom of the terminal connecting part 12. In this way, when the single cell expands and displaces, the extension arm 122 can increase the extension of the terminal connecting part 12, thereby effectively resisting the deformation caused by the expansion of the single cell, and effectively ensuring the stability of the overall structure of the signal acquisition board 1.

[0042] In addition, in the embodiment of the present application, the fuse section 132 is embedded in the body 121, and the fuse section 132 and the first section 131 are connected by the second section 133 embedded in the extension arm 122, so as to realize signal collection. At this time, when the battery expands and deforms, the extension arm 122 will not pull the fuse section 132 when it is stretched and deformed, thereby effectively protecting the fuse section 132 from being torn and disconnected, and ensuring the stability of the signal collection board 1.

[0043] Please refer to Figure 1-Figure 3 In some embodiments, along the width direction X, there is a gap 14 between the main body 121 and the board body 11; the terminal connecting portion 12 has a groove 123, the opening of the groove 123 is toward the board body 11 along the width direction X, and the extension arm 122 is connected to the main body 121 to enclose the groove 123, and the groove 123 is connected to the gap 14.

[0044] In the embodiment of the present application, by providing a gap 14 between the main body 121 and the plate body 11 to communicate with the groove 123 surrounded by the extension arm 122 and the main body 121 , the main body 121 has sufficient freedom.

[0045] It is understandable that, in this embodiment, at least five side surfaces of the main body 121 are suspended, and the sixth side surface is connected to the extension arm 122 to form a groove 123 , so that the main body 121 can be deformed by the extension arm 122 .

[0046] Please refer to Figure 1-Figure 3 In some embodiments, the extension arm 122 includes a third section 1221 and a fourth section 1222. The third section 1221 is connected to the plate body 11, and extends in a direction away from the plate body 11 along the width direction X; at least a portion of the third section 1221 is spaced apart from the main body 121 along the length direction Y; the fourth section 1222 is connected to one end of the third section 1221 away from the plate body 11, and one end of the fourth section 1222 away from the third section 1221 is connected to the main body 121, and the fourth section 1222 extends along the length direction Y, and the third section 1221, the fourth section 1222 and the main body 121 form a groove 123.

[0047] In the embodiment of the present application, the third section 1221 is connected to the fourth section 1222 in an L shape, and the fourth section 1222 is connected to the side of the main body 121 away from the plate body 11 to form a groove 123. At this time, the sum of the groove wall dimensions of the groove 123 can be maximized, thereby maintaining a sufficient extension amount for the extension arm 122.

[0048] like Figure 1As shown, in some embodiments, the signal acquisition board 1 includes a plurality of terminal connection parts 12 and a plurality of acquisition circuits 13, the plurality of terminal connection parts 12 are arranged at intervals along the length direction Y, the first sections 131 of the plurality of acquisition circuits 13 are arranged at intervals along the width direction X and extend along the length direction Y, and the fuse section 132 of each acquisition circuit 13 is embedded in a terminal connection part 12.

[0049] In the embodiment of the present application, a plurality of terminal connection parts 12 are arranged at intervals along the length direction Y on one side of the plate body 11; or, a plurality of terminal connection parts 12 are arranged at intervals along the length direction Y on both sides of the plate body 11 along the width direction X, and the terminal connection parts 12 on both sides along the width direction X are arranged in a staggered manner, and each terminal connection part 12 is connected to a collection circuit 13, so as to facilitate the collection of temperature and voltage signals of multiple single cells arranged along the length direction Y.

[0050] Please refer to Figure 1 and Figure 3 In some embodiments, two fuse sections 132 are embedded in at least one terminal connection portion 12 , and the two fuse sections 132 are spaced apart along the width direction X in the terminal connection portion 12 .

[0051] In the embodiment of the present application, at least one terminal connection part 12 is embedded with two fuse sections 132, which is equivalent to having two acquisition circuits 13 connected to the terminal connection part 12. At this time, one of the acquisition circuits 13 is used to collect voltage signals, and the other acquisition circuit 13 is used to collect temperature signals. In this way, it is possible to avoid the additional setting of a terminal connection part 12 for temperature signal acquisition.

[0052] Please refer to Figure 1 and Figure 3 In some embodiments, the signal acquisition board 1 further includes a plurality of first acquisition terminals 15 and at least one second acquisition terminal 16, each terminal connection portion 12 is connected to a first acquisition terminal 15, and a fuse section 132 in the terminal connection portion 12 is conductively connected to the first acquisition terminal 15; each terminal connection portion 12 in which two fuse sections 132 are embedded is also connected to a second acquisition terminal 16, and one of the fuse sections 132 in the terminal connection portion 12 is conductively connected to the second acquisition terminal 16.

[0053] In the embodiment of the present application, the first acquisition terminal 15 is used to collect voltage signals, and the second acquisition terminal 16 is used to collect temperature signals, wherein the terminal connecting portion 12 embedded with two fuse sections 132 simultaneously connects the first acquisition terminal 15 and the second acquisition terminal 16, thereby realizing the collection of two signals using one terminal connecting portion 12.

[0054] like Figure 1As shown, in some embodiments, a plurality of terminal connection portions 12 spaced apart along the length direction Y form a signal acquisition component 17, and the signal acquisition board 1 includes at least two signal acquisition components 17, and at least two signal acquisition components 17 are disposed on both sides of the board body 11 along the width direction X and are respectively connected to the board body 11.

[0055] In the embodiment of the present application, there can be only one signal acquisition component 17, in which case the plurality of terminal connection parts 12 are arranged on one side of the plate body 11 along the width direction X, and information is collected only on one side. When there are two signal acquisition components 17, they can be arranged on both sides of the plate body 11 along the width direction X, so that signal collection on both sides can be achieved, and then the signal of each single battery arranged along the length direction Y can be collected.

[0056] In some embodiments, the third section 1221 is integrally connected to the plate body 11 , the third section 1221 is integrally connected to the fourth section 1222 , and the fourth section 1222 is integrally connected to the body 121 .

[0057] In the embodiment of the present application, since the flexible acquisition board is usually cut from a whole larger raw material, the third section 1221 is kept integrally connected to the board body 11, the third section 1221 is integrally connected to the fourth section 1222, and the fourth section 1222 is integrally connected to the body 121. This can maintain the integrity of the signal acquisition board 1 and facilitate production. At the same time, it can improve the tear resistance when the single battery expands.

[0058] Accordingly, an electrical device according to an embodiment of the present application includes a battery pack as described in any one of the aforementioned embodiments.

[0059] It can be understood that the electric device of the embodiment of the present application can have all the technical features and corresponding beneficial effects of the above-mentioned battery pack, which will not be elaborated here.

[0060] It should be noted that the electrical devices referred to in this application may include but are not limited to backup power supplies, electrodes, electric vehicles, electric bicycles, electric motorcycles, large batteries, etc.

[0061] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0062] The above is a detailed introduction to a battery pack and an electrical device provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A signal acquisition board, the signal acquisition board having a length direction and a width direction intersecting each other, and comprising: plate body; A terminal connecting portion connected to the plate body along the width direction; The acquisition circuit comprises a first section and a fuse section, wherein the first section is embedded in the plate body, the fuse section is embedded in the terminal connecting portion, and the fuse section is conductively connected to the first section.

2. The battery pack according to claim 1, characterized in that: The terminal connecting portion comprises a body and an extension arm, wherein the extension arm is connected to the plate body, and one end of the extension arm away from the plate body is connected to the body; The acquisition circuit also includes a second section, at least part of which is embedded in the extension arm; one end of the second section is conductively connected to the first section, and the other end of the second section away from the first section is conductively connected to the fuse section, and the fuse section is embedded in the body.

3. The battery pack according to claim 2, characterized in that: Along the width direction, there is a gap between the main body and the plate body; The terminal connecting portion has a groove, the opening of the groove faces the plate body along the width direction, the extension arm is connected to the body to enclose the groove, and the groove is communicated with the gap.

4. The battery pack according to claim 3, characterized in that: The extension arm comprises: A third section is connected to the plate body; along the width direction, the third section extends in a direction away from the plate body; at least a portion of the third section is spaced apart from the body along the length direction; The fourth section is connected to one end of the third section away from the plate body, and one end of the fourth section away from the third section is connected to the main body. The fourth section extends along the length direction, and the third section, the fourth section and the main body form the groove.

5. The battery pack according to any one of claims 1 to 4, characterized in that: The signal acquisition board includes a plurality of terminal connection parts and a plurality of acquisition circuits. The plurality of terminal connection parts are arranged at intervals along the length direction. The first sections of the plurality of acquisition circuits are arranged at intervals along the width direction and extend along the length direction. The fuse section of each acquisition circuit is embedded in one of the terminal connection parts.

6. The battery pack according to claim 5, characterized in that: Two fuse sections are embedded in at least one of the terminal connecting parts, and the two fuse sections are spaced apart in the width direction in the terminal connecting part.

7. The battery pack according to claim 6, characterized in that: The signal acquisition board further includes a plurality of first acquisition terminals and at least one second acquisition terminal, each of the terminal connecting portions is connected to one of the first acquisition terminals, and the fuse section in the terminal connecting portion is conductively connected to the first acquisition terminal; Each of the terminal connecting parts in which two of the fuse sections are embedded is also connected to one of the second collecting terminals, and one of the fuse sections in the terminal connecting part is conductively connected to the second collecting terminal.

8. The battery pack according to claim 5, characterized in that: A plurality of terminal connection parts spaced apart along the length direction form a signal acquisition component. The signal acquisition board includes at least two signal acquisition components. At least two signal acquisition components are arranged on both sides of the board body along the width direction and are respectively connected to the board body.

9. The battery pack according to claim 4, characterized in that: The third section is integrally connected to the plate body, the third section is integrally connected to the fourth section, and the fourth section is integrally connected to the body.

10. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1-9.

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