Battery pack and electric equipment

Abstract

The utility model relates to the technical field of electric equipment, and discloses a battery pack and electric equipment. The electric equipment comprises a battery pack, and the battery pack comprises a shell in which an accommodating cavity is formed; the soft package battery pack is arranged in the containing cavity and comprises a plurality of soft package batteries which are horizontally stacked in the first direction, and positive electrode tabs and negative electrode tabs extend out of the soft package batteries; the first substrate is arranged on one side of the soft package battery pack along the first direction, is provided with a control chip and is provided with a first fixing part; the second substrate is parallel to the first direction and opposite to the soft package battery pack, a plurality of signal acquisition pieces are installed on the second substrate, the second substrate is provided with a second fixing part, and the first fixing part is connected with the second fixing part so that the first substrate and the second substrate can be fixed; signal transmission of at least part of the signal acquisition piece and the control chip is realized through electric connection of the first fixing part and the second fixing part; according to the battery pack disclosed by the utility model, the connecting structure between the substrates is simple, the manufacturing cost is low, the assembling efficiency is high, and the structure is compact.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a battery pack and an electrical equipment. Background Art

[0002] Power tools include an actuator and a battery pack, and the battery pack provides power for the actuator. Most of the battery packs used in power tools adopt cylindrical batteries, and soft-pack batteries are less used. In the existing soft-pack batteries, the mechanical connection structure and circuit connection structure between circuit boards are complex, resulting in high manufacturing cost, low assembly efficiency and large overall volume of the battery pack. Summary of the Utility Model

[0003] An object of the utility model is to provide a battery pack with a simple connection structure between substrates, low manufacturing cost, high assembly efficiency and compact structure.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A battery pack, comprising:

[0006] A housing, within which an accommodation cavity is formed;

[0007] A soft-pack battery group, disposed in the accommodation cavity and including a plurality of soft-pack batteries stacked horizontally along a first direction, and the soft-pack batteries extend positive electrode tabs and negative electrode tabs along a second direction perpendicular to the first direction;

[0008] A first substrate, disposed on one side of the soft-pack battery group along the first direction, and a control chip is installed on the first substrate, which has a first fixing portion;

[0009] A second substrate, disposed parallel to the first direction and opposite to the soft-pack battery group, and a plurality of signal acquisition components are installed on the second substrate, and the second substrate has a second fixing portion, and the first fixing portion is connected to the second fixing portion to fix the first substrate and the second substrate, and signal transmission between at least part of the signal acquisition components and the control chip is realized through electrical connection between the first fixing portion and the second fixing portion.

[0010] As an optional solution, among the first fixing portion and the second fixing portion, one of them is a jack, and the other is a protrusion, and the protrusion is inserted into the jack; the first fixing portion and the second fixing portion are connected by welding.

[0011] As an alternative solution, an inner wall of the jack has a first conductive region electrically connected to one of the control chip and the signal acquisition component, at least a part of an outer wall of the protrusion has a second conductive region electrically connected to the other of the control chip and the signal acquisition component, and the first conductive region is electrically connected to the second conductive region.

[0012] As an alternative solution, the first fixing portion and the second fixing portion are in abutting contact with each other, and the first fixing portion and the second fixing portion are connected by welding.

[0013] As an alternative solution, the first fixing portion is disposed on a side of the first substrate facing the soft-pack battery pack, and the second fixing portion is disposed at one end of the second substrate close to the first substrate along the first direction; or

[0014] The first fixing portion is disposed on an end face of the first substrate close to the second substrate, and the second fixing portion is disposed on a side of the second substrate facing the first substrate.

[0015] As an alternative solution, a positive main terminal and a negative main terminal are mounted on the second substrate, and both the positive main terminal and the negative main terminal are electrically connected to the first substrate.

[0016] As an alternative solution, the positive main terminal includes a positive bending portion perpendicular to the first substrate, a positive jack is provided on the first substrate, and the positive bending portion is inserted into the positive jack and electrically connected to the first substrate; and / or

[0017] The negative main terminal includes a negative bending portion perpendicular to the first substrate, a negative jack is provided on the first substrate, and the negative bending portion is inserted into the negative jack and electrically connected to the first substrate.

[0018] As an alternative solution, the soft-pack battery pack is configured as follows:

[0019] In two adjacent soft-pack batteries, a positive electrode tab of any one of the soft-pack batteries and a negative electrode tab of an adjacent other soft-pack battery are adjacent to each other along the first direction and are electrically connected through a bus bar.

[0020] As an alternative solution, the positive main terminal further includes a first positive connection portion and a second positive connection portion. The first positive connection portion is disposed in a fitting manner on a side of the second substrate facing away from the soft-pack battery pack and is connected to a positive end of the soft-pack battery pack. The second positive connection portion is connected to the first positive connection portion and is disposed in a fitting manner on a side of the first substrate facing the soft-pack battery pack. The positive bending portion is connected to the second positive connection portion; and / or

[0021] The negative electrode main joint includes a first negative electrode connection part and a second negative electrode connection part. The first negative electrode connection part is attached to the side of the second substrate facing away from the soft-pack battery pack and is connected to the end negative electrode of the soft-pack battery pack. The second negative electrode connection part is connected to the first negative electrode connection part and is attached to the side of the first substrate facing the soft-pack battery pack. The negative electrode bending part is connected to the second negative electrode connection part.

[0022] As an optional solution, the positive electrode main joint is arranged on one side of the positive electrode tab or the negative electrode tab close to the outer edge of the second substrate; and / or

[0023] The negative electrode main joint is arranged on one side of the positive electrode tab or the negative electrode tab close to the outer edge of the second substrate.

[0024] As an optional solution, the positive electrode main joint and the negative electrode main joint are provided with signal transmission paths.

[0025] As an optional solution, the number of the first fixing parts is the same as that of the second fixing parts, and the sum of the numbers of the positive electrode main joint, the negative electrode main joint, and the second fixing parts is greater than the number of strings of the soft-pack battery pack.

[0026] As an optional solution, the signal acquisition part includes a voltage acquisition part.

[0027] As an optional solution, it further includes a bracket assembly, and the bracket assembly includes:

[0028] A first bracket arranged between the soft-pack battery pack and the first substrate;

[0029] A second bracket arranged between the soft-pack battery pack and the second substrate.

[0030] As an optional solution, the first substrate and the first bracket are in concave-convex fit; and / or

[0031] The second substrate and the second bracket are in concave-convex fit.

[0032] As an optional solution, the first substrate and the first bracket are fixedly connected; and / or

[0033] The second substrate and the second bracket are fixedly connected.

[0034] As an optional solution, the battery pack further includes a buffer plate, and the buffer plate is arranged between the soft-pack battery pack and the first bracket.

[0035] As an alternative solution, a sensor is mounted on the first bracket, an avoidance hole is provided on the buffer plate, and the sensor passes through the avoidance hole.

[0036] As an alternative solution, the sensor is a temperature sensor.

[0037] As an alternative solution, the battery pack further includes:

[0038] A first heat conducting plate, which is arranged on the side of the soft-pack battery group and is adjacent to the second substrate; and / or

[0039] A second heat conducting plate, which is arranged on the side of the soft-pack battery group and is adjacent to the second substrate; the second heat conducting plate is opposite to the first heat conducting plate; and / or

[0040] A third heat conducting plate, which is arranged on the side of the soft-pack battery group and is opposite to the second substrate.

[0041] As an alternative solution, a heat insulation plate is further included, and the heat insulation plate is arranged between adjacent soft-pack batteries.

[0042] As an alternative solution, the arrangement directions of the positive electrode tabs and the negative electrode tabs of adjacent soft-pack batteries are the same, and multiple soft-pack batteries are connected in parallel; or

[0043] The arrangement directions of the positive electrode tabs and the negative electrode tabs of adjacent soft-pack batteries are opposite, and multiple soft-pack batteries are connected in series.

[0044] As an alternative solution, a signal circuit for connecting the soft-pack battery and the signal acquisition component is provided on the second substrate.

[0045] As an alternative solution, the following are provided on the first substrate:

[0046] An electronic interface, which is used for electrically connecting to the power-consuming body of the electrical device;

[0047] A charge and discharge interface, which is used for connecting to a power source.

[0048] Another object of the present invention is to provide an electrical device, which has low cost and a compact structure by adopting the above battery pack.

[0049] To achieve this purpose, the present invention adopts the following technical solutions:

[0050] An electrical device, including a power-consuming body and the battery pack as described above, and the battery pack is used for supplying power to the power-consuming body.

[0051] As an alternative, the electrical device is a power tool, and the power tool can be any one of an electric drill, an electric screwdriver, a hammer drill, an angle grinder, a sander, a reciprocating saw, a circular saw, a hair dryer, a pruning shear, a chainsaw, a lawn mower.

[0052] The beneficial effects of the present utility model are as follows:

[0053] The battery pack of the present utility model:

[0054] (1) The first substrate with a control chip installed thereon and the second substrate with a signal acquisition component installed thereon are connected through their respective first fixing portion and second fixing portion, which can not only achieve the mechanical fixation of the first substrate and the second substrate, but also realize the communication between the signal acquisition component and the control chip. The structure is simple, the assembly efficiency is high, and the overall structure is more compact.

[0055] (2) The positive main joint is provided with a positive bending portion perpendicular to the first substrate, the negative main joint is provided with a negative bending portion perpendicular to the first substrate, and the positive bending portion is inserted into the positive jack and the negative bending portion is inserted into the negative jack. Therefore, no additional support or connection structure is required to achieve the mechanical connection and electrical connection between the positive main joint and the negative main joint and the first substrate, thereby further simplifying the internal structure of the battery pack, improving the assembly efficiency of the battery pack and the structural compactness.

[0056] (3) The positive main joint is arranged on one side of the positive or negative electrode tab close to the edge of the second substrate, and the negative main joint is arranged on one side of the positive or negative electrode tab close to the edge of the second substrate, so as to leave a setting space for the first fixing portion and the second fixing portion, and make the distribution of the various components that need to cooperate on the first substrate and the second substrate reasonable.

[0057] The electrical device of the present utility model, by adopting the above battery pack, has low cost and a compact structure. Description of the Drawings

[0058] Figure 1 is a schematic structural diagram of the battery pack provided by the specific embodiment of the present utility model;

[0059] Figure 2 is an exploded view of the battery pack provided by the specific embodiment of the present utility model;

[0060] Figure 3 is an exploded view of the battery pack after removing the outer shell provided by the specific embodiment of the present utility model;

[0061] Figure 4 is an exploded view of a partial structure of the battery pack provided by the specific embodiment of the present utility model.

[0062] In the figures:

[0063] 10. Housing; 11. Bottom case; 12. Upper cover; 121. First avoidance hole; 122. Second avoidance hole;

[0064] 20. Soft-pack battery pack; 21. Soft-pack battery; 211. Positive electrode tab; 212. Negative electrode tab; 22. Heat insulation plate;

[0065] 30. First substrate; 31. First fixing part; 32. Positive electrode jack; 33. Negative electrode jack;

[0066] 40. Second substrate; 41. Second fixing part;

[0067] 50. Positive electrode main joint; 51. Positive electrode bent part; 52. First positive electrode connecting part; 53. Second positive electrode connecting part;

[0068] 60. Negative electrode main joint; 61. Negative electrode bent part; 62. First negative electrode connecting part; 63. Second negative electrode connecting part;

[0069] 70. Bracket assembly; 71. First bracket; 711. First main body; 712. First boss; 72. Second bracket; 721. Connecting jack;

[0070] 81. First heat conduction plate; 82. Second heat conduction plate; 83. Third heat conduction plate; 84. Buffer plate; 841. Avoidance hole;

[0071] 93. Bus bar; 94. Electronic interface; 95. Charge and discharge interface. Detailed implementation mode

[0072] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0073] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0074] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0075] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0076] This embodiment provides a battery pack and an electrical device. The electrical device includes an electrical main body and a battery pack, and the battery pack is used to supply power to the electrical main body. Optionally, the electrical device is a power tool, the electrical main body is an actuator, and the battery pack supplies power to the actuator so that the actuator can output corresponding actions. Optionally, the power tool can specifically be any one of an electric drill, an electric screwdriver, a hammer drill, a angle grinder, a sander, a reciprocating saw, a circular saw, a hair dryer, a pruning shear, a chainsaw, a lawn mower. Of course, in other embodiments, the electrical device is not limited to being a power tool.

[0077] As Figures 1 - 3 shown, the battery pack includes a housing 10, a soft-pack battery pack 20, a first substrate 30 and a second substrate 40. Among them, the housing 10 forms a receiving cavity, and the soft-pack battery pack 20, the first substrate 30 and the second substrate 40 are all arranged in the receiving cavity. Specifically, as Figure 2 shown, the housing 10 includes a bottom case 11 and an upper cover 12, and the bottom case 11 and the upper cover 12 are buckled with each other to form the receiving cavity. Optionally, the bottom case 11 and the upper cover 12 can be fixed to each other by means of snap connection, welding, fastener connection, etc.

[0078] As Figure 3As shown, the pouch battery pack 20 includes a plurality of pouch batteries 21, which are horizontally stacked in a first direction. The pouch battery 21 has two tabs extending in a second direction perpendicular to the first direction, namely a positive tab 211 and a negative tab 212. In the same pouch battery 21, the positive tab 211 and the negative tab 212 are arranged in a third direction. Therefore, the tabs of all the pouch batteries 21 are arranged in two columns in the first direction. Specifically, the first direction is the vertical direction, the second direction and the third direction are both horizontal directions, and the second direction is perpendicular to the third direction. In this embodiment, the arrangement directions of the positive tabs 211 and the negative tabs 212 of adjacent pouch batteries 21 are opposite. Therefore, in two adjacent pouch batteries 21, the positive tab 211 of any one pouch battery 21 is adjacent to the negative tab 212 of the adjacent other pouch battery 21 along the first direction, and the positive tab 211 of the pouch battery 21 is connected to the negative tab 212 of the adjacent pouch battery 21 through a bus bar 93, so that the plurality of pouch batteries 21 are connected in series. It should be noted that the series-connected pouch battery pack 20 has a total positive output terminal and a total negative output terminal. The total positive output terminal is defined as the terminal positive electrode, and the total negative output terminal is defined as the terminal negative electrode.

[0079] In some embodiments (not shown), the arrangement directions of the positive tabs 211 and the negative tabs 212 of adjacent pouch batteries 21 are the same, that is, the plurality of positive tabs 211 of the plurality of pouch batteries 21 are arranged in one column, the plurality of negative tabs 212 of the plurality of pouch batteries 21 are arranged in another column, the plurality of positive tabs 211 are connected together through a bus bar 93, and the plurality of negative tabs 212 are connected together through a bus bar 93, so that the plurality of pouch batteries 21 are connected in parallel. Each pouch battery 21 forms a positive electrode and a negative electrode after being connected in series or in parallel.

[0080] As Figure 2 and Figure 3 As shown, the first substrate 30 is disposed on one side of the pouch battery pack 20 in the first direction. In this embodiment, the first substrate 30 is disposed on the upper side of the pouch battery pack 20. The second substrate 40 is disposed parallel to the first direction and opposite to the pouch battery pack 20. In this embodiment, the second substrate 40 is disposed perpendicular to the second direction and opposite to the side of the pouch battery pack 20 where the positive tab 211 and the negative tab 212 are led out. Of course, in other embodiments, the second substrate 40 may also be opposite to the side surface of the pouch battery pack 20 where the tabs are not led out.

[0081] In this embodiment, a control chip is disposed on the first substrate 30, and a signal acquisition component is disposed on the second substrate 40. The first substrate 30 has a first fixing portion 31, and the second substrate 40 includes a second fixing portion 41. The first fixing portion 31 is connected to the second fixing portion 41 to fix the first substrate 30 and the second substrate 40, and at least part of the signal transmission between the signal acquisition component and the control chip is realized through the electrical connection between the first fixing portion 31 and the second fixing portion 41. In this embodiment, through the cooperation of the structures of the first substrate 30 and the second substrate 40, the mechanical fixation of the two can be achieved, and the communication between the signal acquisition component and the control chip can also be achieved. The structure is simple, the assembly efficiency is high, and the overall structure is more compact. It can be understood that a signal circuit connecting the soft-pack battery 21 and the signal acquisition component is disposed on the second substrate 40, so that the signal acquisition component can collect the corresponding information of the soft-pack battery 21.

[0082] As Figure 3 shown, the first fixing portion 31 is a jack, and the second fixing portion 41 is a protrusion. The protrusion is inserted into the jack in a plug-in fit, so that both the mechanical connection between the first substrate 30 and the second substrate 40 and the electrical connection between the signal acquisition component and the control chip can be realized. In this embodiment, the inner wall of the jack has a first conductive region electrically connected to the control chip, and at least part of the outer wall of the protrusion has a second conductive region electrically connected to the signal acquisition component. After the protrusion is inserted into the jack, the first conductive region contacts the second conductive region, thereby realizing the connection between the control chip and the signal acquisition component. In some embodiments, the first fixing portion 31 and the second fixing portion 41 are connected by welding, so as to not only ensure the reliability of the mechanical connection between the first substrate 30 and the second substrate 40.

[0083] Specifically, the first substrate 30 is a first circuit board, and the first conductive region is electrically connected to the control chip through the circuit inside the first substrate 30. Optionally, the second substrate 40 is a second circuit board, and the second conductive region is electrically connected to the signal acquisition component through the internal circuit of the second substrate 40. In some embodiments, the protrusion is a metal component formed on the second substrate 40. The metal component is electrically connected to the signal acquisition component through the internal circuit of the second substrate 40. After the metal component is inserted into the jack, it contacts and communicates with the first conductive region.

[0084] In some embodiments, it may also be that the first fixing portion 31 is a protrusion and the second fixing portion 41 is provided as a jack. In this embodiment, the second conductive region on the protrusion is electrically connected to the control chip through the internal circuit of the first substrate 30, and the first conductive region on the inner wall of the jack is connected to the signal acquisition component through the internal circuit of the second substrate 40.

[0085] In other embodiments, the first fixing portion 31 and the second fixing portion 41 are in abutting contact, and the first fixing portion 31 and the second fixing portion 41 are connected by welding, so that the mechanical connection and electrical connection between the first substrate 30 and the second substrate 40 can also be achieved. Optionally, in some embodiments, the first fixing portion 31 is disposed on one side of the first substrate 30 facing the soft-pack battery pack 20, and the second fixing portion 41 is disposed at one end of the second substrate 40 close to the first substrate 30 along the first direction, and the first fixing portion 31 and the second fixing portion 41 are connected by welding. In some embodiments, the first fixing portion 31 is disposed on the end surface of the first substrate 30 close to the second substrate 40, and the second fixing portion 41 is disposed on one side of the second substrate 40 facing the first substrate 30.

[0086] Specifically, the first fixing portion 31 and the second fixing portion 41 are metal contacts. The first fixing portion 31 is electrically connected to the control chip through a circuit in the first substrate 30, and the second fixing portion 41 is electrically connected to the signal acquisition component through a circuit in the second substrate 40. After the first fixing portion 31 and the second fixing portion 41 are welded, the first substrate 30 and the second substrate 40 are mechanically fixed, and the control chip is electrically connected to the signal acquisition component.

[0087] As Figure 3 shown, a positive-pole main joint 50 and a negative-pole main joint 60 are mounted on the second substrate 40. One end of the positive-pole main joint 50 is connected to the positive pole of the end of the soft-pack battery pack 20, and the other end is electrically connected to the first substrate 30. One end of the negative-pole main joint 60 is connected to the negative pole of the end of the soft-pack battery pack 20, and the other end is electrically connected to the first substrate 30. In this embodiment, a charge-discharge interface 95 is provided on the first substrate 30, and the positive-pole main joint 50 and the negative-pole main joint 60 are respectively connected to the charge-discharge interface 95 through circuits inside the first substrate 30. When the charge-discharge interface 95 is connected to the power-consuming main body, discharging can be performed to supply power to the power-consuming main body; when the charge-discharge interface 95 is connected to an external power source, charging can be performed.

[0088] In some embodiments, the positive-pole main joint 50 and the negative-pole main joint 60 are provided with signal transmission paths, so that the positive-pole main joint 50 and the negative-pole main joint 60 can be used not only for current transmission but also for signal transmission.

[0089] In this embodiment, a plurality of soft-pack batteries 21 are connected in series, and the signal acquisition component includes a voltage acquisition component. For an N-series soft-pack battery pack 20 (i.e., N batteries are connected in series), at least N + 1 positions need to be voltage-signal acquired, where N is a positive integer. In this embodiment, the sum of the numbers of the positive-pole main joint 50, the negative-pole main joint 60, and the second fixing portion 41 is greater than the number of series-connected batteries of the soft-pack battery pack 20, so as to ensure that the voltage signals at each acquired position can be electrically connected to the control chip through the first substrate 30. Exemplarily, as Figure 3As shown, the pouch battery pack 20 is a 5-series battery. There are four second fixing parts 41 and first fixing parts 31 arranged correspondingly. Together with the positive main connector 50 and the negative main connector 60 that can transmit signals, it is possible to transmit the signals collected at six voltage acquisition positions to the first substrate 30 and then to the control chip.

[0090] Of course, in some embodiments, the signal acquisition component may further include a temperature acquisition component, a current acquisition component, etc., which are not specifically limited herein.

[0091] As Figure 3 shown, an electronic interface 94 is further provided on the first substrate 30. The electronic interface 94 is electrically connected to the control chip and is used to be electrically connected to the electrical device, so that the electrical device can monitor the operating state of the pouch battery pack 20, and thus detect faults as early as possible to avoid dangerous situations. As Figure 2 shown, the first substrate 30 is disposed opposite to the upper cover 12. A first avoidance hole 121 is provided on the upper cover 12. The first avoidance hole 121 is located directly above the electronic interface 94 and is used to avoid the electronic interface 94, so that the electronic interface 94 can be electrically connected to the electrical device. A second avoidance hole 122 is further provided on the upper cover 12. The second avoidance hole 122 is located directly above the charge and discharge interface 95 and is used to avoid the charge and discharge interface 95, so that the charge and discharge interface 95 can be electrically connected to the electrical main body or an external power supply.

[0092] As Figure 3 shown, two columns of connection jacks 721 arranged along the first direction are provided on the second substrate 40. The two columns of connection jacks 721 correspond to the two columns of tabs of the pouch battery pack 20 respectively. Each tab can be correspondingly inserted into a connection jack 721. The battery pack further includes a plurality of busbars 93. The busbars 93 are used to connect the tabs in two adjacent connection jacks 721 in the same column. Along the first direction, the respective busbars 93 are alternately arranged in the two columns of insertion holes, so that a plurality of pouch batteries 21 are connected in series.

[0093] In some embodiments, among the two columns of tabs, the lowermost tab in the first column of tabs is the positive tab 211, which forms the positive end of the entire pouch battery pack 20. One end of the positive main connector 50 is connected to this positive end. The uppermost tab in the second column of tabs is the negative tab 212, which forms the negative end of the entire pouch battery 21. One end of the negative main connector 60 is connected to this negative end.

[0094] In other embodiments, it may also be that among the two columns of tabs, the lowermost tab in the first column of tabs is the negative tab 212 and forms the negative end of the entire pouch battery pack 20, and the uppermost tab in the other column of tabs is the positive tab 211 and forms the positive end of the entire pouch battery pack 20.

[0095] In some embodiments, the positive electrode main joint 50 is disposed on one side of the positive electrode tab 211 or the negative electrode tab 212 close to the outer edge of the second substrate 40. In some embodiments, the negative electrode main joint 60 is disposed on one side of the positive electrode tab 211 or the negative electrode tab 212 close to the outer edge of the second substrate 40. In some embodiments, the positive electrode main joint 50 and the negative electrode main joint 60 are respectively disposed on one side of the two tabs close to the outer edge of the second substrate 40. Such an arrangement can leave space for the first fixing portion 31 and the second fixing portion 41, so that the components that need to cooperate on the first substrate 30 and the second substrate 40 are reasonably distributed. In this embodiment, the positive electrode main joint 50 and the negative electrode main joint 60 are respectively disposed at both ends of the second substrate 40 along the third direction.

[0096] As Figure 3 shown, one end of the positive electrode main joint 50 away from the positive electrode of the soft-pack battery pack 20 has a positive electrode bending portion 51, the positive electrode bending portion 51 is perpendicular to the first substrate 30, a positive electrode jack 32 is provided on the first substrate 30, and the positive electrode bending portion 51 is inserted into the positive electrode jack 32 and electrically connected to the first substrate 30. One end of the negative electrode main joint 60 away from the negative electrode of the soft-pack battery pack 20 has a negative electrode bending portion 61, the negative electrode bending portion 61 is perpendicular to the first substrate 30, a negative electrode jack 33 is provided on the first substrate 30, and the negative electrode bending portion 61 is inserted into the negative electrode jack 33 and electrically connected to the first substrate 30. In this embodiment, since the positive electrode bending portion 51 is inserted into the positive electrode jack 32 and the negative electrode bending portion 61 is inserted into the negative electrode jack 33, mechanical connection and electrical connection between the positive electrode main joint 50 and the negative electrode main joint 60 and the first substrate 30 can be achieved without additionally providing other support or connection structures, thereby further simplifying the internal structure of the battery pack, improving the battery pack assembly efficiency and structural compactness. It should be noted that the positive electrode bending portion 51 and the negative electrode bending portion 61 can be further connected to the first substrate 30 by welding to ensure the reliability of the connection.

[0097] In this embodiment, both the positive electrode bending portion 51 and the negative electrode bending portion 61 are disposed perpendicular to the third direction. Of course, in other embodiments, the positive electrode bending portion 51 and the negative electrode bending portion 61 can also be disposed perpendicular to the second direction.

[0098] As Figure 3As shown, the positive electrode main connector 50 further includes a first positive electrode connection portion 52 and a second positive electrode connection portion 53. The first positive electrode connection portion 52 is disposed on the side of the second substrate 40 facing away from the soft-pack battery pack 20 and is connected to the positive electrode of the soft-pack battery pack 20. The second positive electrode connection portion 53 is connected to the first positive electrode connection portion 52 and is disposed on the side of the first substrate 30 facing the soft-pack battery pack 20. The positive electrode bending portion 51 is connected to the second positive electrode connection portion 53. After the first substrate 30 and the second substrate 40 are connected, the first substrate 30 can press against the second positive electrode connection portion 53 to ensure that the entire positive electrode main connector 50 is reliably and smoothly connected and avoid being scratched by other structures.

[0099] Similarly, the negative electrode main connector 60 includes a first negative electrode connection portion 62 and a second negative electrode connection portion 63. The first negative electrode connection portion 62 is disposed on the side of the second substrate 40 facing away from the soft-pack battery pack 20 and is connected to the negative electrode of the soft-pack battery pack 20. The second negative electrode connection portion 63 is connected to the first negative electrode connection portion 62 and is disposed on the side of the first substrate 30 facing the soft-pack battery pack 20. The negative electrode bending portion 61 is connected to the second negative electrode connection portion 63. After the first substrate 30 and the second substrate 40 are connected, the first substrate 30 can press against and limit the second positive electrode connection portion 53 to ensure that the entire negative electrode main connector 60 is reliably and smoothly connected and avoid being scratched by other structures.

[0100] Optionally, both the negative electrode main connector 60 and the positive electrode main connector 50 can be formed by bending a copper sheet.

[0101] As Figure 3 shown, the battery pack further includes a bracket assembly 70. The bracket assembly 70 includes a first bracket 71 and a second bracket 72. The first bracket 71 is disposed between the soft-pack battery pack 20 and the first substrate 30. Since there are raised structures such as solder joints on the side of the first substrate 30 facing the soft-pack battery 21, by disposing the first bracket 71 between the first substrate 30 and the soft-pack battery pack 20, the two can be isolated to prevent the first substrate 30 from damaging the soft-pack battery pack 20. In addition, the first bracket 71 can also support the first substrate 30 to prevent the first substrate 30 from being bent and deformed. In this embodiment, the first bracket 71 includes a first main body 711 and a first boss 712 disposed on the first main body 711. The first boss 712 abuts against the planar portion of the first substrate 30. At this time, a certain space is formed between the first substrate 30 and the first main body 711, and this space can accommodate raised structures such as solder joints on the lower side of the first substrate 30.

[0102] The second bracket 72 is disposed between the soft-pack battery pack 20 and the second substrate 40. Since the side of the second substrate 40 facing the soft-pack battery pack 20 is provided with raised structures such as solder joints, by disposing the second bracket 72 between the second substrate 40 and the soft-pack battery pack 20, isolation can be formed between the two to prevent the second substrate 40 from damaging the soft-pack battery pack 20. In addition, the second bracket 72 can also support the second substrate 40 to prevent the second substrate 40 from bending and deforming.

[0103] In some embodiments, the first substrate 30 and the first bracket 71 are in concave-convex fit, and the second substrate 40 and the second bracket 72 are in concave-convex fit, so that the first bracket 71 positions the first substrate 30, and the second bracket 72 positions the second substrate 40, thereby ensuring that the first fixing portion 31 of the first substrate 30 and the second fixing portion 41 of the second substrate 40 can be smoothly fitted.

[0104] In some embodiments, the first substrate 30 is fixedly connected to the first bracket 71 through fasteners, thereby preventing the first substrate 30 from moving out of position and ensuring the accurate positions of the charge and discharge interface 95 and the electronic interface 94. The second substrate 40 is fixedly connected to the second bracket 72 through fasteners, thereby preventing the second substrate 40 from moving out of position and ensuring the stable and reliable fit between it and the first substrate 30.

[0105] Optionally, in some embodiments, the first bracket 71 and the second bracket 72 can be provided as integrally formed components. In some embodiments, the first bracket 71 and the second bracket 72 are formed separately and connected together by means of welding, snap connection, fastener connection, etc.

[0106] As Figure 3 shown, the battery pack further includes a buffer plate 84, and the buffer plate 84 is disposed between the soft-pack battery pack 20 and the first bracket 71. The buffer plate 84 can play a role in shock absorption and buffering, preventing rigid collision between the first bracket 71 and the soft-pack battery pack 20, and further preventing damage to the soft-pack battery pack 20.

[0107] A sensor is installed on the first bracket 71, the sensor is electrically connected to the control chip, and an avoidance hole 841 is provided on the buffer plate 84, and the sensor passes through the avoidance hole 841, so as to accurately detect relevant information of the soft-pack battery pack 20. Optionally, the sensor can be a temperature sensor, a pressure sensor, etc., which is not limited herein. Optionally, the buffer plate 84 can be made of EVA material.

[0108] As Figures 2 - 4As shown in the figure, the battery pack further includes a first heat conducting plate 81, a second heat conducting plate 82, and a third heat conducting plate 83. Among them, the first heat conducting plate 81 is disposed on the side of the soft-pack battery pack 20 and is adjacent to the second substrate 40; the second heat conducting plate 82 is disposed on the side of the soft-pack battery pack 20 and is opposite to the first heat conducting plate 81; the third heat conducting plate 83 is disposed on the side of the soft-pack battery pack 20 and is opposite to the second substrate 40. By providing the above heat conducting plates, the heat generated during the charging and discharging process of the soft-pack battery pack 20 can be smoothly dissipated to the outside through the housing 10. Optionally, the first heat conducting plate 81, the second heat conducting plate 82, and the third heat conducting plate 83 can all be made of a metal material with good thermal conductivity. It can be understood that in other embodiments, the battery pack can also choose to provide only one or two of the first heat conducting plate 81, the second heat conducting plate 82, and the third heat conducting plate 83.

[0109] As Figure 4 shown in the figure, the battery pack further includes a heat insulating plate 22, and the heat insulating plate 22 is disposed between adjacent soft-pack batteries 21. The heat insulating plate 22 can block the heat transfer between adjacent soft-pack batteries 21, so that the generated heat is dissipated to the outside through the housing 10, and the uncontrollable thermal runaway between the soft-pack batteries 21 is avoided. In this embodiment, a heat insulating plate 22 is disposed between every two adjacent soft-pack batteries 21. In other embodiments, the heat insulating plate 22 can be provided only between some adjacent soft-pack batteries 21. Optionally, the heat insulating plate 22 can be made of pre-oxidized fiber or other types of aerogel composite materials, which are not specifically limited herein.

[0110] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Battery pack, characterized in that, Comprising: A housing (10) within which a receiving cavity is formed; A soft-pack battery pack (20) disposed in the receiving cavity and including a plurality of soft-pack batteries (21) horizontally stacked along a first direction, wherein the soft-pack battery (21) extends a positive pole tab (211) and a negative pole tab (212) in a second direction perpendicular to the first direction; A first substrate (30) disposed on one side of the soft-pack battery pack (20) along the first direction, and a control chip is mounted on the first substrate (30), having a first fixing portion (31); A second substrate (40) disposed parallel to the first direction and opposite to the soft-pack battery pack (20), and a plurality of signal acquisition components are mounted on the second substrate (40), and having a second fixing portion (41), the first fixing portion (31) is connected to the second fixing portion (41) to fix the first substrate (30) and the second substrate (40), and signal transmission between at least part of the signal acquisition components and the control chip is achieved through electrical connection between the first fixing portion (31) and the second fixing portion (41).

2. The battery pack according to claim 1, characterized in that, Among the first fixing portion (31) and the second fixing portion (41), one is a jack and the other is a protrusion, and the protrusion is inserted into the jack; the first fixing portion (31) and the second fixing portion (41) are welded.

3. The battery pack according to claim 2, wherein The inner wall of the jack has a first conductive region electrically connected to one of the control chip and the signal acquisition components, and at least part of the outer wall of the protrusion has a second conductive region electrically connected to the other of the control chip and the signal acquisition components, and the first conductive region is electrically connected to the second conductive region.

4. The battery pack according to claim 1, characterized in that, The first fixing portion (31) and the second fixing portion (41) are in abutment, and the first fixing portion (31) and the second fixing portion (41) are welded.

5. The battery pack according to claim 4, wherein, The first fixing portion (31) is disposed on the side of the first substrate (30) facing the soft-pack battery pack (20), and the second fixing portion (41) is disposed at one end of the second substrate (40) along the first direction close to the first substrate (30); or The first fixing portion (31) is disposed on the end face of the first substrate (30) close to the second substrate (40), and the second fixing portion (41) is disposed on the side of the second substrate (40) facing the first substrate (30).

6. The battery pack according to claim 1, characterized in that, A positive main joint (50) and a negative main joint (60) are mounted on the second substrate (40), and both the positive main joint (50) and the negative main joint (60) are electrically connected to the first substrate (30).

7. The battery pack according to claim 6, characterized in that, The positive main joint (50) includes a positive bending portion (51) perpendicular to the first substrate (30), and a positive jack (32) is provided on the first substrate (30), and the positive bending portion (51) is inserted into the positive jack (32) and electrically connected to the first substrate (30); and / or The negative terminal joint (60) includes a negative bending portion (61) perpendicular to the first substrate (30). A negative jack (33) is provided on the first substrate (30). The negative bending portion (61) is inserted into the negative jack (33) and electrically connected to the first substrate (30).

8. The battery pack according to claim 7, characterized in that, The soft-pack battery pack (20) is configured such that: In two adjacent soft-pack batteries (21), the positive electrode tab (211) of any one of the soft-pack batteries (21) and the negative electrode tab (212) of the adjacent other soft-pack battery (21) are adjacent along the first direction and are electrically connected through a bus bar (93).

9. The battery pack according to claim 8, wherein, The positive terminal joint (50) further includes a first positive connection portion (52) and a second positive connection portion (53). The first positive connection portion (52) is disposed on the side of the second substrate (40) facing away from the soft-pack battery pack (20) and is connected to the positive end of the soft-pack battery pack (20). The second positive connection portion (53) is connected to the first positive connection portion (52) and is disposed on the side of the first substrate (30) facing the soft-pack battery pack (20). The positive bending portion (51) is connected to the second positive connection portion (53); and / or The negative terminal joint (60) includes a first negative connection portion (62) and a second negative connection portion (63). The first negative connection portion (62) is disposed on the side of the second substrate (40) facing away from the soft-pack battery pack (20) and is connected to the negative end of the soft-pack battery pack (20). The second negative connection portion (63) is connected to the first negative connection portion (62) and is disposed on the side of the first substrate (30) facing the soft-pack battery pack (20). The negative bending portion (61) is connected to the second negative connection portion (63).

10. The battery pack according to claim 6, characterized in that, The positive terminal joint (50) is disposed on the side of the positive electrode tab (211) or the negative electrode tab (212) close to the outer edge of the second substrate (40); and / or The negative terminal joint (60) is disposed on the side of the positive electrode tab (211) or the negative electrode tab (212) close to the outer edge of the second substrate (40).

11. The battery pack according to claim 6, wherein, The positive terminal joint (50) and the negative terminal joint (60) are provided with signal transmission paths.

12. The battery pack according to claim 6, wherein, The number of the first fixing portions (31) is the same as that of the second fixing portions (41). The sum of the numbers of the positive terminal joint (50), the negative terminal joint (60), and the second fixing portions (41) is greater than the number of strings of the soft-pack battery pack (20).

13. The battery pack according to any one of claims 1-12, characterized in that, The signal acquisition member includes a voltage acquisition member.

14. The battery pack according to any one of claims 1-12, characterized in that, It further includes a bracket assembly (70), and the bracket assembly (70) includes: A first bracket (71) disposed between the soft-pack battery pack (20) and the first substrate (30); A second bracket (72) disposed between the soft-pack battery pack (20) and the second substrate (40).

15. The battery pack according to claim 14, wherein, The first substrate (30) and the first bracket (71) are in concave-convex fit; and / or The second substrate (40) is in concave-convex fit with the second bracket (72).

16. The battery pack according to claim 14, characterized in that, The first substrate (30) is fixedly connected to the first bracket (71); and / or The second substrate (40) is fixedly connected to the second bracket (72).

17. The battery pack according to claim 14, wherein, It further includes a buffer plate (84), and the buffer plate (84) is disposed between the soft-pack battery pack (20) and the first bracket (71).

18. The battery pack according to claim 17, wherein, A sensor is installed on the first bracket (71), an avoidance hole (841) is provided on the buffer plate (84), and the sensor passes through the avoidance hole (841).

19. The battery pack according to claim 18, characterized in that, The sensor is a temperature sensor.

20. The battery pack according to any one of claims 1-12, characterized in that, It further includes: A first heat conducting plate (81), disposed on the side of the soft-pack battery pack (20) and adjacent to the second substrate (40); and / or A second heat conducting plate (82), disposed on the side of the soft-pack battery pack (20) and adjacent to the second substrate (40); the second heat conducting plate (82) is opposite to the first heat conducting plate (81); and / or A third heat conducting plate (83), disposed on the side of the soft-pack battery pack (20) and opposite to the second substrate (40).

21. The battery pack according to any one of claims 1-12, characterized in that, It further includes a heat insulation plate (22), and the heat insulation plate (22) is disposed between adjacent soft-pack batteries (21).

22. The battery pack according to any one of claims 1-12, characterized in that, The arrangement directions of the positive electrode tabs (211) and the negative electrode tabs (212) of adjacent soft-pack batteries (21) are the same, and multiple soft-pack batteries (21) are connected in parallel; or The arrangement directions of the positive electrode tabs (211) and the negative electrode tabs (212) of adjacent soft-pack batteries (21) are opposite, and multiple soft-pack batteries (21) are connected in series.

23. The battery pack according to any one of claims 1-12, characterized in that, A signal circuit for connecting the soft-pack battery (21) and the signal acquisition component is provided on the second substrate (40).

24. The battery pack according to any one of claims 1-12, characterized in that, On the first substrate (30), there are provided: An electronic interface (94), and the electronic interface (94) is used for electrically connecting to the power-consuming body of the electrical device; A charge-discharge interface (95), and the charge-discharge interface (95) is used for connecting to a power source.

25. Electrical equipment, characterized in that, It includes a power-consuming body and the battery pack according to any one of claims 1-24, and the battery pack is used for supplying power to the power-consuming body.

26. The electrical device according to claim 25, wherein The electrical device is a power tool, and the power tool can be any one of an electric drill, an electric screwdriver, a hammer drill, an angle grinder, a sander, a reciprocating saw, a circular saw, a hair dryer, a pruning shear, a chain saw, a lawn mower.

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