WO2023184251A1

WO2023184251A1 - Battery control assembly, battery pack and electric device

Info

Publication number: WO2023184251A1
Application number: PCT/CN2022/084140
Authority: WO
Inventors: 徐卫潘; 李廷永; 刘欢
Original assignee: 东莞新能安科技有限公司
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-10-05

Abstract

Disclosed in the embodiments of the present application are a battery control assembly, a battery pack and an electric device. The battery control assembly comprises a circuit board, at least two first conductive sheets, a first electronic component, a first input part and a first output part, wherein the circuit board is provided with a first surface; the first conductive sheets are provided on the first surface; the first electronic component is provided on the first surface, and is connected between two adjacent first conductive sheets; the first input part is connected to the one first conductive sheet; the first output part is connected to the other conductive sheet; and the first input part, the first conductive sheets, the first electronic component and the first output part are connected to form a first power current path. The first electronic component is connected between the two adjacent first conductive sheets, which is beneficial for rapidly conducting and dissipating heat generated by the first electronic component by means of the first conductive sheets, such that the temperature of the first electronic component is lowered, so as to allow a large power current to pass through the circuit board conveniently, and thereby improving the charge-discharge multiplying power of a battery.

Description

Battery control components, battery packs and electrical devices

Technical field

The present application relates to the field of battery technology, and in particular, to a battery control component, a battery pack and an electrical device.

Background technique

With the current increasingly prominent environmental problems and the rapid development of new energy, the battery circuit board needs to pass a large power current, and the large power current can easily cause the circuit board itself and the electronic components on the board to heat up seriously, causing the electronic components to The failure rate of the device increases, which affects the service life of the battery.

Contents of the invention

Embodiments of the present application are intended to provide a battery control component, a battery pack and a power consumption device. The battery control component can improve the heat dissipation performance of the battery, thereby facilitating the battery to pass a larger power current to increase the charge and discharge rate of the battery. .

In order to alleviate the above technical problems, the embodiments of this application adopt the following technical solutions:

In a first aspect, embodiments of the present application provide a battery control assembly, including a circuit board, at least two first conductive sheets, a first electronic component, a first input part and a first output part. The circuit board has a first surface, at least two first conductive sheets are provided on the first surface, a first electronic component is provided on the first surface, and the first electronic component is connected to two adjacent ones. Between the first conductive sheets, the first input part is connected to one first conductive sheet, and the first output part is connected to another first conductive sheet. The first input part, the first conductive sheet, the first electronic component and the first output part are connected to form a first power current path.

By connecting the first electronic component between two adjacent first conductive sheets, the thermal resistance between the first electronic component and the first conductive sheet can be reduced, which is beneficial to the heat generated by the first electronic component. It is quickly conducted and dissipated through the first conductive sheet, thereby reducing the temperature of the first electronic component, so that the circuit board can pass a larger power current and increase the charge and discharge rate of the battery.

As a further improvement of the above solution, the battery control assembly further includes a support plate, at least two second conductive sheets, a second electronic component, a second input part and a second output part. The support plate has a second surface facing the circuit board, and the first surface of the circuit board is disposed away from the second surface. At least two second conductive sheets are disposed on the second surface, and second electronic components are disposed on the second surface. The second electronic components are connected between two adjacent second conductive sheets. . The second input part is connected to a second conductive sheet, the second output part is connected to another second conductive sheet, and the second input part, the second conductive sheet, the second electronic component and the second output part are connected to a third Two power current paths, the first power current path and the second power current path have opposite polarities.

By connecting the second electronic component between two adjacent second conductive sheets, the thermal resistance between the second electronic component and the second conductive sheet can be reduced, which is beneficial to the heat generated by the second electronic component. It is quickly conducted and dissipated through the second conductive sheet, thereby reducing the temperature of the second electronic component, so that a larger power current can pass through the second current path, thereby further increasing the battery charge and discharge rate. As a further improvement of the above solution, the first surface includes a first part and a second part, and at least part of the first electronic components in the first power current path is provided in the first part. The second surface includes third and fourth portions. Along the third direction, the projection of the first part on the support plate is located on the third part, the projection of the second part on the support plate is located on the fourth part, and the second power circuit At least part of the second electronic component in the passage is provided in the fourth part.

Each first electronic component on the first current path and each second electronic component on the second current path are staggered in the third direction, which can further reduce heat concentration.

As a further improvement of the above solution, a plurality of the first conductive sheets are arranged along the first direction, and the first electronic component is disposed between two adjacent first conductive sheets. Along the first direction, an initial first conductive piece among the plurality of first conductive pieces is connected to the first input part, and an end first conductive piece among the plurality of first conductive pieces is connected to the first conductive piece. The first output part is connected; and/or a plurality of the second conductive sheets are arranged along the first direction, and the second electronic component is disposed between two adjacent second conductive sheets, along the first direction. In one direction, the first second conductive piece among the plurality of second conductive pieces is connected to the second input part, and the end second conductive piece among the plurality of second conductive pieces is connected to the second output part. connect.

The multi-segment overpower current design of the first conductive sheet can effectively reduce the heat generated by the circuit board when passing current. The first electronic component is arranged between the two first conductive sheets, which is conducive to the heat generated by the first electronic component being absorbed. Quickly guide away to alleviate the temperature rise of the first electronic components.

As a further improvement of the above solution, the first conductive sheet is provided with a first connection part, and the first connection part is connected to the circuit board. A plurality of first connection parts can be provided on each first conductive piece, and the first conductive piece and the first connection part are used to pass larger power current.

As a further improvement of the above solution, the battery control component further includes a first output terminal and a second output terminal. The first output terminal is provided with at least two first threaded holes, and the first output terminal is connected to the first output part through at least two bolts. The second output terminal has at least two second threaded holes, and the second output terminal is connected to the second output part through at least two bolts.

Using output terminals, the output terminals can tighten the external cable to facilitate two current paths to connect to the external cable. Fixing with at least two bolts can increase the area when current flows and reduce the contact resistance. At the same time, the locking is more stable and difficult to loosen, which can effectively alleviate the serious heating caused by poor contact between the output terminal and the output part.

As a further improvement of the above solution, the first electronic component includes a MOS element and a sampling resistor, and the second electronic component includes a fuse. Both the MOS element and the sampling resistor are arranged between the two first conductive sheets, which can reduce the heat generated by the MOS element or the sampling resistor when the current flows through it. The same is true for the fuse.

As a further improvement of the above solution, a plurality of sampling resistors are arranged along the second direction, two adjacent sampling resistors are arranged at intervals, and the plurality of sampling resistors arranged along the second direction are connected to two adjacent sampling resistors. between a conductive piece. A plurality of first sub-electronic components form a shunt. At the same time, the spacing arrangement can also alleviate heat transfer between the first sub-electronic components to reduce heat concentration.

According to some embodiments of the present application, in a second aspect, the present application also provides a battery pack, including the battery control assembly as described in any of the above embodiments.

As a further improvement of the above solution, the battery pack further includes a thermally conductive insulating pad. The thermally conductive insulating pad is attached to the end surface of the first electronic component away from the first surface, and the thermally conductive insulating pad covers at least part of the first electronic component and at least part of the first conductive sheet. The heat of the first electronic component and the first conductive sheet can be conducted and dissipated through the thermally conductive insulating pad to slow down the temperature rise of the first electronic component and the first conductive sheet.

As a further improvement of the above solution, the battery pack further includes a heat sink, and the heat sink is attached to a surface of the thermally conductive insulating pad away from the first conductive sheet. Thermal insulation pads can conduct heat from electronic components on the circuit board to the radiator, and dissipate the heat through the radiator.

As a further improvement of the above solution, thermally conductive silicone grease is provided between the heat sink and the thermally conductive insulating pad. Thermal silicone grease fills the gap between the radiator and the thermal insulating pad so that the thermal insulating pad fits closely with the radiator and improves heat conduction efficiency.

As a further improvement of the above solution, the heat sink includes a base plate and fins. The substrate is attached to the thermally conductive insulating pad, and a plurality of fins are fixed on a surface of the substrate away from the thermally conductive insulating pad. Two adjacent fins are spaced apart.

The contact area between the substrate and the thermal insulation pad is large, which can improve the heat conduction efficiency. The fins can increase the contact area between the radiator and the air. Two adjacent fins are spaced apart to reduce heat concentration and improve heat dissipation efficiency.

As a further improvement of the above solution, the substrate includes a first section, a second section and a third section. Along the third direction, the first section, the second section and the third section are arranged in sequence. Along the first direction, the width of the first section is smaller than the width of the second section, and the first section and the second section together form a first notch at one end of the substrate. Along the first direction, the width of the second section is smaller than the width of the third section, and the second section and the third section together form a second notch at one end of the substrate. The avoidance design by setting up the first gap is conducive to meeting the electrical safety and avoidance requirements of electronic components; the same is true for the second gap.

As a further improvement of the above solution, the heat sink includes a base plate, a first connection plate, a second connection plate, a first bending part, a second bending part, a first thermal conductive pad and a second thermal conductive pad. The base plate is attached to the thermally conductive insulating pad. The first connecting plate and the second connecting plate are both fixed on the surface of the base plate away from the thermally conductive insulating pad. The first connecting plate and the second connecting plate are spaced apart. . The first bending portion is connected to the first connecting plate, and the first bending portion is bent in a direction away from the second connecting plate. The second bending portion is connected to the second connecting plate, and the second bending portion is bent in a direction away from the first connecting plate. The first thermal conductive pad is attached to the end surface of the first bending portion that is away from the substrate, and the second thermal conductive pad is attached to the end surface of the second bending portion that is away from the substrate.

The heat on the base plate can be conducted to and dissipated through the two connecting plates. The first connecting plate and the second connecting plate are opposite and spaced apart from each other on the base plate, which can reduce heat concentration. The heat on the first connecting plate can be conducted and dissipated through the first bending portion. The first bending portion is bent in a direction away from the second connecting plate, which can reduce heat concentration. The second bending part is connected to the second connecting plate. The heat on the second connecting plate can be conducted and dissipated through the second bending part. The second bending part is bent in a direction away from the first connecting plate to further reduce the heat. concentrated.

As a further improvement of the above solution, the base plate, the first connecting plate, the second connecting plate, the first bending part and the second bending part are integrally formed. One-piece molding setup to increase the overall strength of the radiator.

As a further improvement of the above solution, the battery pack further includes a casing, a cell module and a cover. The housing is surrounded by a receiving cavity, and the housing is provided with an opening. The opening is connected with the receiving cavity. The battery core module is received in the receiving cavity. The support plate of the battery control component is fixed on the battery. The end surface of the core module faces the opening, the circuit board of the battery control assembly is fixed to the end surface of the support plate facing away from the battery module, and the cover is configured to cover the opening of the housing. The first thermal pad is fitted between the first bending part and the cover, or the first thermal pad is fitted between the first bending part and the housing; the second The thermally conductive pad is fitted between the second bending part and the cover, or the second thermally conductive pad is fitted between the second bending part and the housing.

The heat of the first bending part can be transmitted to the cover through the first thermal pad, and finally dissipated outward from the cover; or, the end surface of the first thermal pad away from the first bending part is attached to the housing, The heat is eventually dissipated from the casing. In the same way, the heat of the second bending part can be finally dissipated outward through the cover or the casing.

As a further improvement of the above solution, the base plate of the heat sink is provided with at least two first positioning holes, the thermal pad is provided with at least two second positioning holes, and the circuit board is provided with at least two third positioning holes. Holes, along the direction from the heat sink to the circuit board, the first positioning hole, the second positioning hole and the third positioning hole correspond one to one. The battery also includes a positioning fastener that extends into the first positioning hole, the second positioning hole and the third positioning hole and locks the heat sink and the thermally conductive insulating pad to the circuit board.

The positioning fastener can be a locking bolt, that is, the above-mentioned first positioning hole, the second positioning hole and the third positioning hole are all threaded holes, and the stud of the locking bolt is threadedly connected to the above-mentioned first positioning hole and the second positioning hole. and the third positioning hole, so that the heat sink and the thermal insulation pad are locked to the circuit board.

According to some embodiments of the present application, in a third aspect, the present application also provides an electrical device, including the battery pack as described in any of the above embodiments.

The above description is only an overview of the technical solutions of the present application. In order to have a clearer understanding of the technical means of the present application, they can be implemented according to the contents of the description. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, Specific embodiments of the present application are listed below.

Description of drawings

One or more embodiments are illustrated through the corresponding drawings. These exemplary illustrations do not constitute limitations to the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. It is stated that the figures in the accompanying drawings do not constitute limitations on scale.

Figure 1 is a schematic diagram of the installation of the battery control assembly in some embodiments of the present application;

Figure 2 is a schematic structural diagram of a circuit board in some embodiments of the present application;

Figure 3 is a schematic diagram of partial current flow of the circuit board in some embodiments of the present application;

Figure 4 is a schematic diagram of the installation of the circuit board and the support plate in some embodiments of the present application;

Figure 5 is a top view of a battery control assembly in some embodiments of the present application;

Figure 6 is a schematic structural diagram of a battery pack in some embodiments of the present application;

Figure 7 is an exploded view of Figure 6;

Figure 8 is a schematic diagram of the installation of thermally conductive insulating pads in some embodiments of the present application;

Figure 9a is a schematic diagram of the installation of comb heat sinks and thermally conductive insulating pads in some embodiments of the present application;

Figure 9b is an exploded view of Figure 9a;

Figure 10 is a schematic structural diagram of a comb heat sink in some embodiments of the present application;

Figure 11 is a schematic diagram of the installation of a comb radiator in some embodiments of the present application;

Figure 12 is a front view of a comb heat sink in some embodiments of the present application;

Figure 13 is a schematic diagram of the installation of profile radiators and thermal insulation pads in some embodiments of the present application;

Figure 14 is an exploded view of Figure 13;

Figure 15 is a schematic structural diagram of a profile radiator in some embodiments of the present application.

In the picture:

1. Battery pack;

1000. Battery control components;

10. Circuit board; 11. First surface; 11a, first part; 11b, second part; 12. Third positioning hole; 13. Through hole; 14. Positioning groove; 15. Copper layer;

20. First conductive sheet; 20a, first negative conductive sheet; 20b, second negative conductive sheet; 20c, third negative conductive sheet; 20d, fourth negative conductive sheet; 21, first connection part;

30. First electronic component; 30a, first sub-electronic component; 30b, second sub-electronic component; 30c, third sub-electronic component;

40. The first input part;

50. The first output department;

60. Support plate; 61. Second surface; 611. Third part; 612. Fourth part;

70. Second conductive sheet; 70a, first positive conductive sheet; 70b, second positive conductive sheet;

80. Second electronic components;

90. Second input part;

100. Second output part;

110. First output terminal; 111. Negative cable; 112. First threaded hole; 113. First bolt;

120. Second output terminal; 121. Positive cable; 122. Second bolt;

130. Thermal conductive insulation pad; 131. Second positioning hole;

140. Heat sink; 141. Base plate; 141a, first section; 141b, second section; 141c, third section; 142. Fins; 143. First notch; 144. Second notch; 145a, third section A connecting plate; 145b, second connecting plate; 146a, first bending part; 146b, second bending part; 147a, first thermal pad; 147b, second thermal pad; 148, first positioning hole;

150. Positioning fasteners;

2000, battery cell module; 2100, single battery cell;

3000, shell; 3100, receiving cavity; 3200, opening;

4000, cover body.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "fixed to"/"attached to"/"mounted on" another element, it can be directly on the other element, or there may be one or more intervening elements present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements present therebetween. The terms "upper", "lower", "inner", "outer" and similar expressions used in this specification are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by a person skilled in the technical field belonging to this application. The terms used in the description of the present application are only for the purpose of describing specific embodiments and are not used to limit the present application. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. "Plural" in this specification means two or more.

In this specification, "installation" includes welding, screwing, snapping, gluing, etc. to fix or restrict a certain component or device to a specific position or place. The component or device can be maintained at a specific position or place. It can move within a limited range even if it does not move. The component or device may or may not be disassembled after being fixed or restricted to a specific position or place, which is not limited in the embodiments of this application.

An embodiment of the present application provides a battery control assembly 1000. Please refer to Figure 1, which is a schematic installation diagram of the battery control assembly 1000. The battery control assembly 1000 can be installed on the battery module 2000 . The battery control assembly 1000 includes a circuit board 10 , a first conductive sheet 20 , a first electronic component 30 , a first input part 40 and a first output part 50 . The first conductive sheet 20 and the first electronic component 30 are both disposed on the circuit board 10 . The first electronic component 30 is connected between two adjacent first conductive sheets 20 . The first input part 40 is connected to one of the first conductive sheets 20 . One conductive piece 20a, the first output part 50 is connected to another first conductive piece 20d. The current can be input from the first input part 40 and flow through the first conductive sheet 20 and the first electronic component 30, and finally be output from the first output part 50, thereby forming a first power current path. In this embodiment, the first power current path is described as a negative pole (P-) loop. In other embodiments, the first power current path may also be a positive pole (P+) loop.

For the above-mentioned circuit board 10, please refer to Figures 1 and 2. The circuit board 10 can be arranged in a flat plate shape. The circuit board 10 has a first surface 11. The above-mentioned first conductive sheet 20 and the first electronic component 30 can be installed. On the first surface 11, installation methods include but are not limited to welding, screwing, snapping or bonding. In some embodiments, the circuit board 10 includes a battery management system (BMS), which can be used to charge and discharge the battery module 2000 .

Regarding the above-mentioned first conductive sheet 20, please refer to Figures 1 and 2. The first conductive sheet 20 is used to transmit current. The first conductive sheet 20 can be a copper bar with a small resistance, which can reduce the heat generated by the first conductive sheet 20. In other embodiments, the material of the first conductive sheet 20 can also be selected from metals with low resistance such as gold and silver. The number of the first conductive sheets 20 can be set to more than two, and at least two first conductive sheets 20 are arranged in sequence along the first direction X. The first conductive sheet 20 has a larger size in the second direction Y, so that the first conductive sheet 20 can pass the power current and reduce the heat generation of the first electronic component 30 when the current passes through. The second direction Y is perpendicular to the first direction X.

Furthermore, the first conductive sheet 20 is provided with a first connection part 21 , and the first connection part 21 is connected to the circuit board 10 . A plurality of first connection portions 21 can be provided on each first conductive sheet 20, and the first conductive sheets 20 and the first connection portions 21 are used for overdynamic current. Taking the first conductive sheet 20 as a copper bar as an example, the first connection part 21 can use copper bar pins. A plurality of copper bar pins are fixed on the edge of the copper bar. The circuit board 10 is provided with positioning slots 14. The copper bar The pins extend from the positioning grooves 14 to facilitate positioning and installation of the copper bars on the circuit board 10; in other embodiments, the first conductive sheet 20 can also be made of silver bars or gold bars.

For the above-mentioned first electronic component 30, please refer to Figures 2 and 3. The first electronic component 30 is connected between two adjacent first conductive sheets 20. The first conductive sheet 20 can be used to conduct the first electronic component. The heat generated by device 30 can reduce heat accumulation. Figure 3 is a schematic diagram of partial current flow in the first power current path. The current enters a first conductive sheet 20a, flows into the first electronic component 30 through the copper layer 15 of the circuit board 10, and then flows into the copper layer 15 of the circuit board 10. , and finally flows out from the other first conductive sheet 20b. The first conductive sheet 20 is arranged near the first electronic component 30 . The first conductive sheet 20 should be as close as possible to the first electronic component 30 to reduce the heat between the first electronic component 30 and the first conductive sheet 20 . The resistance is such that the heat generated by the first electronic component 30 can be quickly conducted and dissipated through the first conductive sheet 20 , thereby reducing the temperature of the first electronic component 30 .

The number of the first conductive sheets 20 can be multiple. The plurality of first conductive sheets 20 are arranged in sequence. A first electronic component 30 is disposed between two adjacent first conductive sheets 20. The plurality of first conductive sheets 20 are arranged in sequence. The arrangement of the plurality of first conductive sheets 20 can increase the area when current passes through, effectively reduce the heat generation of the circuit board 10 when the power current passes through, and at the same time, multiple first conductive sheets 20 can be used to conduct heat and cool down the first electronic component 30 .

As shown in Figure 2, the first conductive sheet 20 includes four, namely a first negative conductive sheet 20a, a second negative conductive sheet 20b, a third negative conductive sheet 20c and a fourth negative conductive sheet 20d, along the first direction X , the first negative electrode conductive sheet 20a, the second negative electrode conductive sheet 20b, the third negative electrode conductive sheet 20c and the fourth negative electrode conductive sheet 20d are arranged in sequence. The first electronic component 30 includes a first sub-electronic component 30a, a second sub-electronic component 30b and a third sub-electronic component 30c. The first sub-electronic component 30a can select a sampling resistor for collecting the first power current. For information such as voltage and current in the path, both the second sub-electronic component 30b and the third sub-electronic component 30c can use MOS components (MOS is a Metal-Oxide-Semiconductor field-effect transistor). The first sub-electronic component 30a is connected between the first negative electrode conductive sheet 20a and the second negative electrode conductive sheet 20b, and the second sub-electronic component 30b is connected between the second negative electrode conductive sheet 20b and the third negative electrode conductive sheet 20c, The third sub-electronic component 30c is connected between the third negative conductive sheet 20c and the fourth negative conductive sheet 20d. The overdynamic current design of the multiple negative conductive sheets can effectively reduce the heat generated by the circuit board 10 when the current flows through it. An electronic component 30 is arranged between the two negative conductive sheets, which facilitates the heat generated by the first electronic component 30 to be quickly dissipated to alleviate the temperature rise of the first electronic component 30 . In other embodiments, the second negative conductive sheet 20b and the third negative conductive sheet 20c may be selectively arranged according to the magnitude of the power current and the heat generation condition of the first electronic component 30 .

Further, as shown in FIG. 2 , along the second direction Y, a plurality of first sub-electronic components 30a are arranged in sequence, two adjacent first sub-electronic components 30a are arranged at intervals, and the plurality of arranged first sub-electronic components are arranged at intervals. The devices 30a are connected between two adjacent first conductive sheets 20. The power current flows along the first direction Heat transfer between sub-electronic components 30a to reduce heat concentration.

For the above-mentioned first input part 40, please refer to Figures 1, 2 and 4 together. The battery control component 1000 is disposed on the battery module 2000. Along the third direction Z, the first surface 11 of the circuit board 10 is away from the battery. The core module 2000 is arranged, the first input part 40 is arranged away from the first surface 11, a through hole 13 is opened on the circuit board 10, and a first conductive sheet 20 partially extends into the through hole 13 and is connected to the first input part 40. The first input part 40 is electrically connected to the battery module 2000 through wires or copper bars. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

For the above-mentioned first output part 50, please refer to Figures 1, 2 and 4. Along the first direction Arrange the fourth negative electrode conductive piece 20d at the end. In some other embodiments, the first input part 40 is integrally formed with the first negative conductive sheet 20a, and the first output part 50 is integrally formed with the fourth negative conductive sheet 20d. The first output part 50 is connected to the external negative electrode cable 111. In one embodiment, the current can be input from the first input part 40 and flow through the first negative electrode conductive sheet 20a, the first sub-electronic component 30a, and the second negative electrode conductor in sequence. piece 20b, the second sub-electronic component 30b, the third negative conductive piece 20c, the third sub-electronic component 30c and the fourth negative conductive piece 20d, and are finally transmitted from the first output part 50 to the negative cable 111 for The power is supplied by an external electrical device. Optionally, the first input part 40 and the first negative conductive sheet 20a are connected through fasteners, such as bolts. In other embodiments, they can also be connected by welding, conductive glue, etc. Optionally, the first output part 50 and the fourth negative conductive piece 20d are connected through fasteners, such as bolts. In other embodiments, they can also be connected by welding, conductive glue, etc.

Please refer to FIG. 5 , which is a top view of the battery control assembly 1000 . For convenience of explanation, the dotted line portion in FIG. 5 is the circuit board 10 . The first output part 50 can be connected to the negative cable 111 through the first output terminal 110. One end of the first output terminal 110 tightens the external cable, and the other end has at least two first threaded holes 112. The first output terminal 110 It is connected to the first output part 50 through at least two first bolts 113 . Fixing with at least two first bolts 113 can increase the area when current passes and reduce the contact resistance. At the same time, the locking is more stable and difficult to loosen, which can effectively alleviate the problem of contact between the first output terminal 110 and the first output part 50. Failure to do so may result in severe fever.

Referring to FIGS. 4 and 5 , the battery control assembly 1000 further includes a support plate 60 configured to support the circuit board 10 . The first surface 11 of the circuit board 10 is disposed away from the support plate 60 , and the support plate 60 has a second surface. 61. The second surface 61 is arranged facing the circuit board 10 . The support plate 60 is provided with a second conductive sheet 70, a second electronic component 80, a second input part 90 and a second output part 100. The above-mentioned first input part 40 may also be provided on the support plate 60, and the second electronic component The device 80 is connected between two adjacent second conductive sheets 70, the second input part 90 is connected to one of the second conductive sheets 70a, and the second output part 100 is connected to the other second conductive sheet 70b. The current can be input from the second input part 90 and flow through the second conductive sheet 70 and the second electronic component 80, and finally be output from the second output part 100, thereby forming a second power current path. The polarity of the second power current path is opposite to the polarity of the first power current path. In this embodiment, the second power current path is described as a negative (P+) loop. In other embodiments, the second power current path is also It can be a positive (P-) circuit.

For the above-mentioned second conductive sheet 70, please refer to Figures 4 and 5. The second conductive sheet 70 is used to transmit current. In order to reduce the heat generated when the second conductive sheet 70 passes current, the second conductive sheet 70 can also be made of a material with a smaller resistance. Small copper platoon, silver platoon or gold platoon etc. The number of the second conductive sheets 70 may be more than two, and at least two second conductive sheets 70 are sequentially disposed along the first direction X.

For the above-mentioned second electronic component 80, please refer to Figures 4 and 5. The second electronic component 80 is connected between two adjacent second conductive sheets 70. The second conductive sheet 70 can be used to conduct the second electronic component. The heat generated by device 80 can reduce heat build-up. The second conductive sheet 70 is arranged near the second electronic component 80 . The second conductive sheet 70 can be as close as possible to the second electronic component 80 to reduce the heat between the second electronic component 80 and the second conductive sheet 70 . resistance, so that the heat generated by the second electronic component 80 can be quickly conducted and dissipated through the second conductive sheet 70 , thereby reducing the temperature of the second electronic component 80 .

The number of the second conductive sheets 70 is two, which are the first positive conductive sheet 70a and the second positive conductive sheet 70b. Along the first direction X, the first positive conductive sheet 70a and the second positive conductive sheet 70b are arranged in sequence. To protect the current path, the first electronic component 30 may use a fuse. The fuse is disposed between the first positive conductive sheet 70a and the second positive conductive sheet 70b, which facilitates the heat generated by the fuse to be quickly conducted and dissipated. In some other embodiments, the number of second conductive sheets 70 can also be set to multiple, the plurality of second conductive sheets 70 are arranged in sequence, and second electronic components are disposed between two adjacent second conductive sheets 70 80. The arrangement of the plurality of second conductive sheets 70 can increase the area for passing current, which is beneficial to heat conduction and cooling of the plurality of second electronic components 80.

For the above-mentioned second input part 90, please refer to FIG. 4. The second input part 90 is provided on the second surface 61 of the support plate 60. The second input part 90 is configured to be electrically connected to the battery module 2000. The current can pass through the second input part 90. The second input part 90 transmits to the second power current path.

For the above-mentioned second output part 100, please refer to Figures 4 and 5. Along the first direction The second positive conductive sheet 70b. The second output part 100 is connected to the external positive cable 121. In one embodiment, the current can be input from the second input part 90 and flow through the first positive conductive sheet 70a, the second electronic component 80 and the second positive conductive sheet in sequence. 70b, and finally transmitted from the second output part 100 to the positive cable 121 to provide power to external electrical devices. The second output part 100 can also be connected to the positive cable 121 through the second output terminal 120. One end of the second output terminal 120 tightens the external positive cable 121, and the other end is connected to the second output part 100 through at least two second bolts 122. connect.

Please refer to Figures 2, 4 and 5 together. The first surface 11 of the circuit board 10 includes a first part 11a and a second part 11b. The above-mentioned first negative electrode conductive sheet 20a, first sub-electronic component 30a, second negative electrode The conductive sheet 20b, the second sub-electronic component 30b, the third negative conductive sheet 20c, the third sub-electronic component 30c and the fourth negative conductive sheet 20d can all be disposed in the first part 11a, or in most of the first power current path The first electronic component 30 is disposed on the first part 11a, while fewer electronic components or no electronic components are disposed on the second part 11b. The second surface 61 of the support plate 60 includes a third part 611 and a fourth part 612. Most of the electronic components in the second power current path are arranged in the fourth part 612. The third part 611 has fewer or no electronic components. Set up any electronic components. Along the third direction Z, the projection of the first part 11a on the support plate 60 is located at the third part 611, and the projection of the second part 11b on the support plate 60 is located at the fourth part 612, so that most of the first power current path is One electronic component 30 and most of the second electronic components 80 on the second power current path are staggered from each other in the third direction Z, which can further alleviate heat concentration. In other embodiments, all the first electronic components 30 on the first power current path may also be staggered in the third direction Z from all the second electronic components 80 on the second power current path.

An embodiment of the present application also provides a battery pack 1, including the battery control assembly 1000 described in any of the above embodiments. Referring to Figures 6 to 9b, the battery pack 1 also includes a battery module 2000, a casing 3000, a cover 4000, a thermally conductive insulating pad 130 and a heat sink 140. The housing 3000 is surrounded by a receiving cavity 3100, and an opening 3200 is also provided on the top of the housing 3000. The opening 3200 is connected with the receiving cavity 3100, and the battery core module 2000 is accommodated in the receiving cavity 3100. The battery module 2000 includes a plurality of There are three single cell cells 2100, and several single cell cells 2100 are stacked in sequence along the third direction Z. The support plate 60 and the circuit board 10 of the battery control assembly 1000 are sequentially arranged on the battery module 2000. The second surface 61 of the support plate 60 and the first surface 11 of the circuit board 10 are both arranged away from the battery module 2000. . The cover 4000 is configured to cover the opening 3200 of the housing 3000 to enclose the battery module 2000 and the battery control assembly 1000 in the receiving cavity 3100 .

For the above-mentioned thermally conductive and insulating pad 130, please refer to Figures 8 to 9b. The thermally conductive and insulating pad 130 is in the shape of a flat plate. The thermally conductive and insulating pad 130 is attached to the end surface of the first electronic component 30 away from the first surface 11. The thermally conductive and insulating pad 130 is in the shape of a flat plate. 130 at least partially covers the first conductive sheet 20 and the first electronic component 30 . Optionally, the first conductive sheet 20 covers parts of the second negative conductive sheet 20b, the third negative conductive sheet 20c, the fourth negative conductive sheet 20d, the first sub-electronic component 30a, the second sub-electronic component 30b and The third sub-electronic component 30c. The heat of each first conductive sheet 20 and each first electronic component 30 can be conducted and dissipated through the thermally conductive insulating pad 130 to slow down the temperature rise of the first conductive sheet 20 and first electronic component 30 .

For the above-mentioned heat sink 140, the heat sink 140 is attached to the surface of the thermally conductive insulating pad 130 away from the first conductive sheet 20. The thermally conductive insulating pad 130 can conduct the heat of each electronic component on the circuit board 10 to the thermally conductive insulating pad 130, and The heat is dissipated through the heat sink 140. In some embodiments, thermally conductive silicone grease is disposed between the heatsink 140 and the thermally conductive insulating pad 130 , and the thermally conductive silicone grease fills the gap between the heatsink 140 and the thermally conductive insulating pad 130 so that the thermally conductive insulating pad 130 is tightly connected to the heatsink 140 fit.

The heat sink 140 includes a comb-tooth radiator (shown in Figures 9a to 12) and a profile radiator (shown in Figures 13 to 15). Taking the comb-tooth radiator as an example, the heat sink 140 includes a base plate 141 and fins. 142. The substrate 141 is attached to the surface of the thermally conductive insulating pad 130. The contact area between the substrate 141 and the thermally conductive insulating pad 130 is large, which can improve the heat conduction efficiency. The fins 142 are disposed on the surface of the base plate 141 away from the thermally conductive insulating pad 130. There are multiple fins 142, and the fins 142 are perpendicular to the base plate 141. The fins 142 can increase the contact area between the heat sink 140 and the air. , two adjacent fins 142 are arranged at intervals to reduce heat concentration and improve heat dissipation efficiency.

Referring to Figures 11 and 12, the substrate 141 includes a first section 141a, a second section 141b and a third section 141c. Along the third direction Z, the first section 141a, the second section 141b and the third section 141c are arranged in sequence. Along the first direction The avoidance design by setting the first notch 143 is conducive to meeting the electrical safety and avoidance requirements of electronic components. Optionally, the width of the second section 141b is smaller than the width of the third section 141c along the first direction The second notch 144 further improves electrical safety. In some other embodiments, in order to improve the overall strength of the base plate 141, the first section 141a, the second section 141b and the third section 141c are integrally formed.

For another example, the radiator 140 is a profile radiator. Please refer to Figures 13 to 15 together. The heat sink 140 includes a base plate 141, a first connecting plate 145a, a second connecting plate 145b, a first bending portion 146a, a second bending portion 146b, a first thermal pad 147a and a Two thermal pads 147b.

The substrate 141 is attached to the end surface of the thermally conductive insulating pad 130 away from the circuit board 10 . The thermally conductive insulating pad 130 can conduct the heat generated by the electronic components on the circuit board 10 to the substrate 141 . The substrate 141 may be in direct contact with the thermally conductive insulating pad 130, or may be connected through other connections, such as thermally conductive glue. The first connecting plate 145a and the second connecting plate 145b are both fixed on the surface of the base plate 141 away from the thermally conductive insulating pad 130. The heat on the base plate 141 can be conducted to the two connecting

plates

145a, 145b, and can pass through the two connecting

plates

145a, 145b. 145b is lost. The first connecting plate 145a and the second connecting plate 145b are arranged oppositely and spaced apart on the base plate 141, which can reduce heat concentration. The first bending portion 146a is connected to the first connecting plate 145a. The heat on the first connecting plate 145a can be conducted and dissipated through the first bending portion 146a. The first bending portion 146a is bent in a direction away from the second connecting plate 145b. Folding can reduce heat concentration. The second bending portion 146b is connected to the second connecting plate 145b. The heat on the second connecting plate 145b can be conducted and dissipated through the second bending portion 146b. The second bending portion 146b is bent in a direction away from the first connecting plate 145a. Fold to further reduce heat concentration. The first thermal conductive pad 147a is attached to the end surface of the first bending portion 146a away from the substrate 141, and the end surface of the first thermal conductive pad 147a away from the first bending portion 146a can be attached to the cover 4000, so that the first bending portion 147a is attached to the cover 4000. The heat of the folded portion 146a can be transmitted to the cover 4000 through the first thermal pad 147a, and finally dissipated outward from the cover 4000; or, the end surface of the first thermal pad 147a away from the first bent portion 146a is attached to the shell. on the body 3000, so that the heat is eventually dissipated from the casing 3000. The second thermal pad 147b is attached to the end surface of the second bent portion 146b that is away from the substrate 141. The end surface of the second thermal pad 147b that is away from the second bent portion 146b can be attached to the cover 4000 or the housing 3000. Therefore, the heat of the second bent portion 146b is finally dissipated outward through the cover 4000 or the housing 3000 . In some other embodiments, in order to improve the overall strength of the heat sink 140, the base plate 141, the first connecting plate 145a, the second connecting plate 145b, the first bending portion 146a and the second bending portion 146b are integrally formed.

13 and 14 , the base plate 141 of the heat sink 140 is provided with at least two first positioning holes 148 , the thermally conductive insulating pad 130 is provided with at least two second positioning holes 131 , and the circuit board 10 is provided with at least two second positioning holes 148 . The three positioning holes 12 correspond one to one along the first direction, the first positioning hole 148, the second positioning hole 131 and the third positioning hole 12. The battery pack 1 also includes a positioning fastener 150 that extends into the first positioning hole 148, the second positioning hole 131 and the third positioning hole 12 and locks the heat sink 140 and the thermally conductive insulating pad 130 to the circuit. Plate 10. The positioning fastener 150 is a locking bolt, that is, the above-mentioned first positioning hole 148, the second positioning hole 131 and the third positioning hole 12 are all threaded holes, and the studs of the locking bolt are threadedly connected to the above-mentioned

first positioning hole

148, 131 and 12. The second positioning hole 131 and the third positioning hole 12 allow the heat sink 140 and the thermally conductive insulating pad 130 to be locked on the circuit board 10 .

In the technical solution of the present application, the multi-segment first conductive sheets 20 are designed to pass dynamic current, and the first electronic components 30 are connected between two adjacent first conductive sheets 20, which can reduce the number of first electronic components 30. The thermal resistance between the first electronic component 30 and the first conductive sheet 20 enables the heat generated by the first electronic component 30 to be quickly conducted and dissipated through the first conductive sheet 20 , thereby reducing the temperature of the first electronic component 30 so that the circuit board 10 The excess power current increases the charge and discharge rate of the battery pack 1; at the same time, each first electronic component 30 on the first power current path and each second electronic component 80 on the second power current path are staggered from each other, which can further alleviate heat. concentrated. In addition, the heat of the first electronic component 30 and the first conductive sheet 20 can be conducted and dissipated through the thermally conductive insulating pad 130 to slow down the temperature rise of the first electronic component 30 and the first conductive sheet 20. The thermally conductive insulating pad 130 can The heat of each electronic component on the circuit board 10 is conducted to the heat sink 140 and is dissipated through the heat sink 140 . By using the battery pack 1 of the present application, the temperature of the battery pack 1 for fast charging and high-rate discharge can be reduced, and the service life can be improved.

An embodiment of the present application also provides an electrical device, including the battery pack 1 as described in any of the above embodiments.

The battery control assembly 1000 and the battery pack 1 disclosed in the embodiment of the present application may be used in, but are not limited to, electrical devices such as vehicles, ships, or aircrafts. The power supply system of the electrical device can be composed of the battery control component 1000 disclosed in this application, the battery pack 1, etc., which is beneficial to mitigating the temperature rise of various electronic components and can effectively satisfy the fast charging and high-rate discharge of the battery pack 1 temperature and service life requirements.

The embodiment of the present application provides an electrical device that uses the battery pack 1 as a power source. The electrical device can be but is not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. . Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; under the idea of the present application, the technical features of the above embodiments or different embodiments can also be combined. The steps may be performed in any order, and there are many other variations of different aspects of the application as described above, which are not provided in detail for the sake of brevity; although the application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art Skilled persons should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the implementation of the present application. Example scope of technical solutions.

Claims

A battery control component, characterized by including:

a circuit board having a first surface;

At least two first conductive sheets are provided on the first surface;

A first electronic component is provided on the first surface, and the first electronic component is connected between two adjacent first conductive sheets;

The first input part is connected to a first conductive piece;

The first output part is connected to another first conductive sheet, and the first input part, the first conductive sheet, the first electronic component and the first output part are connected to form a first power current path.
The battery control assembly according to claim 1, wherein the battery control assembly further includes:

A support plate having a second surface facing the circuit board, and a first surface of the circuit board being disposed away from the second surface;

At least two second conductive sheets are provided on the second surface;

A second electronic component is provided on the second surface, and the second electronic component is connected between two adjacent second conductive sheets;

The second input part is connected to a second conductive piece;

The second output part is connected to another second conductive sheet. The second input part, the second conductive sheet, the second electronic component and the second output part are connected to form a second power current path. The first power current The polarity of the path and the second power current path are opposite.
The battery control assembly according to claim 2, wherein the first surface includes a first part and a second part, and at least part of the first electronic component in the first power current path is disposed on the first part; part

The second surface includes a third part and a fourth part. Along the third direction, the projection of the first part on the support plate is located on the third part, and the projection of the second part on the support plate is The projection is located in the fourth part, and at least part of the second electronic components in the second power circuit path is located in the fourth part.
The battery control assembly according to claim 2, wherein a plurality of first conductive sheets are arranged along a first direction, and the first electronic component is disposed between two adjacent first conductive sheets. , along the first direction, the first conductive piece at the beginning of the plurality of first conductive pieces is connected to the first input part, and the first conductive piece at the end of the plurality of first conductive pieces is connected to the first conductive piece. The first output part is connected; and/or,

A plurality of second conductive sheets are arranged along a first direction, and the second electronic component is disposed between two adjacent second conductive sheets. Along the first direction, the plurality of second conductive sheets are The first second conductive piece in the piece is connected to the second input part, and the second conductive piece at the end of the plurality of second conductive pieces is connected to the second output part.
The battery control assembly according to any one of claims 1 to 4, wherein the first conductive sheet is provided with a first connection part, and the first connection part is connected to the circuit board.
The battery control assembly according to any one of claims 1 to 4, characterized in that the battery control assembly further includes:

a first output terminal connected to the first output part;

The second output terminal is connected to the second output part.
The battery control assembly according to any one of claims 4, wherein the first electronic component includes a MOS element and a sampling resistor, and the second electronic component includes a fuse.
The battery control assembly according to claim 7, wherein a plurality of the sampling resistors are arranged along the second direction, two adjacent sampling resistors are arranged at intervals, and the plurality of sampling resistors arranged along the second direction are all connected. between two adjacent first conductive sheets.
A battery pack, characterized by including the battery control assembly according to any one of claims 1 to 8.
The battery pack according to claim 9, wherein the battery pack further includes a thermally conductive insulating pad;

The thermally conductive insulating pad is attached to the end surface of the first electronic component away from the first surface, and the thermally conductive insulating pad covers at least part of the first electronic component and at least part of the first conductive sheet.
The battery pack according to claim 10, wherein the battery pack further includes a radiator;

The heat sink is attached to a surface of the thermally conductive insulating pad away from the first conductive sheet.
The battery pack according to claim 11, wherein a thermally conductive silicone grease is provided between the heat sink and the thermally conductive insulating pad.
The battery pack according to claim 11, wherein the heat sink includes:

A substrate, attached to the thermally conductive insulating pad;

Fins, a plurality of the fins are fixed on the surface of the substrate away from the thermally conductive insulating pad, and two adjacent fins are arranged at intervals.
The battery pack according to claim 13, wherein the substrate includes a first section, a second section and a third section;

Along the third direction, the first section, the second section and the third section are arranged in sequence;

Along the first direction, the width of the first section is smaller than the width of the second section, and the first section and the second section together form a first notch at one end of the substrate.
The battery pack according to claim 14, wherein along the first direction, the width of the second section is smaller than the width of the third section, and the second section and the third section are common to A second notch is formed on one end of the substrate.
The battery pack according to claim 11, wherein the heat sink includes:

A substrate, attached to the thermally conductive insulating pad;

The first connecting plate and the second connecting plate are both fixed to the surface of the base plate away from the thermally conductive insulating pad, and the first connecting plate and the second connecting plate are spaced apart;

A first bending portion is connected to the first connecting plate, and the first bending portion is bent in a direction away from the second connecting plate;

a second bending portion connected to the second connecting plate, the second bending portion being bent in a direction away from the first connecting plate;

A first thermal pad fitted to the end surface of the first bending portion away from the substrate;

The second thermal pad is attached to the end surface of the second bending portion away from the substrate.
The battery pack according to claim 16, wherein the base plate, the first connecting plate, the second connecting plate, the first bending part and the second bending part are integrally formed.
The battery pack according to claim 16 or 17, characterized in that the battery pack further includes:

A housing is enclosed with a receiving cavity, the housing is provided with an opening, and the opening is connected with the receiving cavity;

The battery module is received in the receiving cavity, the support plate of the battery control component is fixed on the end surface of the battery module facing the opening, and the circuit board of the battery control component is fixed on the support plate. The end face facing away from the battery module;

a cover configured to cover the opening of the housing;

The first thermally conductive pad is fitted between the first bending part and the cover, or the first thermally conductive pad is fitted between the first bending part and the housing;

The second thermally conductive pad is fitted between the second bending part and the cover, or the second thermally conductive pad is fitted between the second bending part and the housing.
The battery pack according to any one of claims 11 to 17, wherein the base plate of the heat sink is provided with at least two first positioning holes, and the thermal pad is provided with at least two second positioning holes, The circuit board is provided with at least two third positioning holes. Along the direction from the heat sink to the circuit board, the first positioning hole, the second positioning hole and the third positioning hole correspond one to one;

The battery pack also includes:

Positioning fasteners extend into the first positioning hole, the second positioning hole and the third positioning hole and lock the heat sink and the thermally conductive insulating pad to the circuit board.
An electrical device, characterized by including the battery pack according to any one of claims 9 to 19.