Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, the battery pack comprises at least one battery cell and a hydrogel component, and the surface of the hydrogel component is in contact with the battery cell. When the battery cell is in a normal working state, the solvent of the hydrogel assembly is relatively stable and cannot be discharged from the hydrogel assembly. When the battery cell is overcharged, the temperature of the battery cell can be gradually increased, heat can be transferred to the hydrogel assembly, when the heating temperature of the battery cell reaches the target temperature, the solvent in the hydrogel is vaporized and discharged from the hydrogel assembly, and due to the fact that the solvent absorbs heat during vaporization, after the solvent is discharged from the hydrogel assembly, the heat can be brought out, and the battery cell is prevented from being overcharged. Therefore, the purpose of cooling the battery cell is achieved. The charging state can be cut off without additionally arranging an overcharging circuit, so that the cost can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, especially a kind of battery pack and electrical equipment. BACKGROUND

[0002] Lithium electronic battery in overcharge process, will make that the structure of positive electrode material of electric core changes, internal side reaction aggravates etc., to cause temperature to rise rapidly, if there is no cooling means, electric core internal side reaction and material structure will further deteriorate, lead to thermal runaway, even appear open fire, to cause the whole battery pack to appear fire even explosion, therefore existing battery pack will increase overcharge protection circuit, when battery appears overcharge phenomenon, protection circuit promptly cuts off charging state, to protect battery.

[0003] But increase charging protection circuit, on the one hand, it will increase the use cost of device, on the other hand, charging protection circuit will occupy the larger space of BMS (Battery Management System, for short BMS, Chinese name: battery management system) board, cause battery pack space utilization to reduce.

[0004] In addition, how to reduce the cost of battery pack on the basis of realizing overcharge protection is also a technical problem to be solved by the person skilled in the art. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of battery pack and electrical equipment, can reduce the cost of battery pack on the basis of realizing overcharge protection.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A battery pack comprising: at least one electric core and a hydrogel assembly, the surface of the hydrogel assembly is in contact with the electric core, and the solvent in the hydrogel assembly vaporizes to cool the electric core when the heat generation temperature of the electric core reaches a target temperature.

[0008] In some embodiments, the hydrogel assembly includes a film shell and a hydrogel, the film shell includes a first film sheet and a second film sheet, the edges of the first film sheet and the second film sheet are heat-sealed, and the space between the first film sheet and the second film sheet contains the hydrogel.

[0009] In some embodiments, the film shell is at least any one of an aluminum plastic film, a PET film, and a PI film, and at least one face of each electric core is provided with the hydrogel assembly.

[0010] In some embodiments, the battery pack includes at least two electric cores, and the hydrogel assembly is provided between two adjacent electric cores in the thickness direction of the electric cores.

[0011] In some embodiments, the battery pack comprises at least two of the hydrogel assemblies, and the side edges of the at least two hydrogel assemblies are connected.

[0012] In some embodiments, the plurality of hydrogel assemblies are integrally formed.

[0013] In some embodiments, the battery pack further comprises a first housing, a second housing, and a BMS board, the battery cell is arranged in the first housing, the BMS board is connected to a first end of the first housing, the second housing is arranged at the first end of the first housing, the BMS board is arranged in the second housing, and a potting glue injection port is arranged on the second housing.

[0014] In some embodiments, the BMS board is provided with a button, the BMS board is provided with a fence arranged around the button, the fence is in close contact with a side of the second housing facing the first housing, and the second housing is provided with a relief hole for exposing the button.

[0015] In some embodiments, the fence is an elastic body, and a surrounding edge is arranged on a side of the second housing facing the BMS board, and the surrounding edge is in close contact with the fence.

[0016] A power consuming device comprising the battery pack of any one of the above.

[0017] Compared with the prior art, the above technical solution has the following advantages:

[0018] The battery pack comprises at least one battery cell and a hydrogel assembly, and the surface of the hydrogel assembly is in contact with the battery cell. In a normal working state, the solvent in the hydrogel is relatively stable and will not be discharged from the hydrogel assembly. When the battery cell is overcharged, the temperature of the battery cell will gradually increase, and the heat will be transferred to the hydrogel assembly. When the heat generation temperature of the battery cell reaches a target temperature, the solvent in the hydrogel vaporizes and is discharged from the hydrogel assembly. Since the solvent absorbs heat when vaporizing, the heat will be taken out of the battery pack after the solvent is discharged from the hydrogel assembly, thereby achieving the purpose of cooling the battery cell. No additional overcharge circuit is needed to protect the battery pack, which can effectively reduce the cost. In addition, since the overcharge circuit is omitted, the use of devices can be reduced, thereby reducing the space occupation at the corresponding position of the battery pack, and improving the space utilization. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only represent the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0020] Figure 1 A perspective structural schematic view of a battery pack provided by a specific embodiment of the present application is shown in the figure.

[0021] Figure 2 A structural schematic view of a first shell and a second shell of a battery pack in a separated state provided by a specific embodiment of the present application is shown in the figure.

[0022] Figure 3 An exploded view of a battery pack provided by a specific embodiment of the present application is shown in the figure.

[0023] Figure 4 A structural schematic view of an electric core assembly of a battery pack provided by a specific embodiment of the present application is shown in the figure.

[0024] Figure 5 A partial structural schematic view of Figure 4 is shown in the figure.

[0025] Figure 6 An exploded view of the electric core assembly in Figure 4 is shown in the figure.

[0026] Figure 7 A structural schematic view of an electric core assembly of a battery pack provided by another specific embodiment of the present application is shown in the figure.

[0027] Figure 8 A structural schematic view of a hydrogel assembly in a bent state is shown in the figure.

[0028] Figure 9 An exploded view of a hydrogel assembly in an unfolded state is shown in the figure.

[0029] Figure 10 A structural schematic view of a first shell is shown in the figure.

[0030] Figure 11 A structural schematic view of the first shell from another perspective is shown in the figure.

[0031] Figure 12 A structural schematic view of a second shell is shown in the figure.

[0032] Figure 13 A structural schematic view of the second shell from another perspective is shown in the figure.

[0033] Figure 14It is a structural schematic view of the BMS board;

[0034] Figure 15 It is a structural schematic view when the battery cell assembly is put into the first shell and the release film is removed;

[0035] Figure 16 It is a structural schematic view of the second foam.

[0036] The reference signs are as follows:

[0037] 10-first shell, 11-first end, 111-first buckle, 112-first step surface, 113-slot, 12-second end, 13-output terminal, 131-female insert piece, 132-straight copper piece;

[0038] 20-second shell, 21-pouring glue injection port, 22-avoidance hole, 23-surrounding edge, 24-second step surface, 25-second buckle;

[0039] 30-BMS board, 31-key, 32-surrounding fence, 33-LED lamp;

[0040] 40-pouring glue;

[0041] 50-battery cell assembly, 51-battery cell, 511-tab, 512-nickel piece, 52-hydrogel assembly, 521-first film piece, 522-second film piece, 523-hydrogel, 53-first foam, 54-second foam, 541-foam, 542-release film, 55-total tab copper piece, 56-insulating piece. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.

[0043] Please refer to Figures 1 to 16 .

[0044] The utility model discloses a battery provided by an embodiment, comprising: at least one battery cell 51 and hydrogel assembly 52, hydrogel assembly 52 is equipped with hydrogel 523, and the solvent in the hydrogel 523 is relatively stable in low temperature state, and the main component of the solvent is water molecule and inorganic compound. The water molecule moves intensively and can be vaporized in high temperature state. The surface of the hydrogel assembly 52 is in contact with the battery cell 51, and the structure of the hydrogel assembly 52 is related to the structure of the battery cell 51, for example, when the battery cell 51 is a soft package battery cell 51, the hydrogel assembly 52 can be a sheet structure, when the battery cell 51 is a cylindrical battery cell 51, the hydrogel assembly 52 can be a cylindrical structure, and the cylindrical structure of the hydrogel assembly 52 can be sleeved on the outside of the cylindrical battery cell 51 to ensure the contact area of the hydrogel assembly 52 and the battery cell 51. In normal working state, the water in the hydrogel 523 is relatively stable and will not be discharged from the hydrogel assembly 52. In abnormal working state, for example, when the battery cell 51 is overcharged, the temperature of the battery cell 51 will gradually increase, and the heat will be transferred to the hydrogel assembly 52, when the heating temperature of the battery cell 51 reaches the target temperature, the water in the hydrogel 523 is vaporized and discharged from the hydrogel assembly 52, because the water absorbs heat when vaporizing, so after discharging the hydrogel assembly 52, the heat will also be taken out of the battery, thereby achieving the purpose of cooling the battery cell 51. Because the hydrogel 523 can achieve the purpose of cooling the battery cell 51 when overcharged, it is not necessary to additionally set an overcharge circuit to protect the battery, which can effectively reduce the cost, in addition, because the overcharge circuit is omitted, the use of devices can be reduced, thereby reducing the space occupation at the corresponding position of the battery, thereby achieving the purpose of improving the space utilization, and in addition to the cooling effect when overcharged, the battery cell 51 can also be cooled in time when the battery cell 51 is overheated in other working conditions.

[0045] In some embodiments, the hydrogel assembly 52 includes a film shell and a hydrogel 523, the film shell is at least any one of an aluminum plastic film, a PET film and a PI film, the film shell in the embodiment is an aluminum plastic film, the aluminum plastic film surrounds the hydrogel containing cavity, the aluminum plastic film is a commonly used material in the field of soft package battery, the aluminum plastic film is used as the wrapping material of the hydrogel 523, which can improve the convenience of material selection, and the aluminum plastic film has good heat conduction capacity, which can effectively transfer the heat of the battery cell 51 to the aluminum plastic film, and the aluminum plastic film further transfers the heat to the hydrogel 523.

[0046] In some embodiments, the aluminum plastic film includes a first film piece 521 and a second film piece 522, the edge positions of the first film piece 521 and the second film piece 522 are heat sealed, for example Figure 9As shown, the first diaphragm 521 and the second diaphragm 522 are rectangular sheet structures, the positions of the four edges of the first diaphragm 521 and the second diaphragm 522 are packaged together by heat pressing, and the space between the first diaphragm 521 and the second diaphragm 522 is a hydrogel accommodating cavity. When the structure of the hydrogel 523 is a cuboid structure, the hydrogel accommodating cavity is also a cubic cavity. In order to facilitate the accommodation of the hydrogel 523, the first diaphragm 521 is provided with a first recess, and the second diaphragm 522 is provided with a second recess. The openings of the first recess and the second recess are oppositely arranged. When the first diaphragm 521 and the second diaphragm 522 are packaged, the first recess and the second recess form a hydrogel 523 accommodating cavity. In the specific manufacturing process, the recess of the first diaphragm 521 can be arranged upward, and then the hydrogel 523 is placed in the first recess. Subsequently, the second recess of the second diaphragm 522 is arranged downward, and then buckled on the first diaphragm 521. Finally, the edges of the first diaphragm 521 and the second diaphragm 522 are heat sealed by heat pressing.

[0047] In some embodiments, in order to ensure the heat dissipation of the battery pack, at least one face of each battery cell 51 is provided with a hydrogel assembly 52. In order to maximize the heat dissipation capacity of the battery pack, each side of the battery cell 51 can also be provided with a hydrogel assembly 52.

[0048] It should be noted that the hydrogel 523 can be designed to have different water vaporization temperature points at different temperatures. The hydrogel 523 of the present application can have a vaporization temperature point of 100℃ to 135℃. When the temperature is within this range, the water in the hydrogel 523 will vaporize. Since the density of gas is less than that of liquid, the expansion of the outer packaging aluminum plastic film of the hydrogel 523 after vaporization will cause the pressure in the aluminum plastic film to increase. When the pressure is greater than a certain value, the heat-sealed edge position of the aluminum plastic film will be expanded. Since the vaporization process of water will absorb a large amount of heat, when the water vapor is released to the outside environment of the aluminum plastic film, it can take away heat, thereby rapidly reducing the temperature of the battery cell 51, and ensuring that the battery cell 51 is within a safe temperature range, so that the battery cell assembly 50 will not appear fire, explosion phenomenon.

[0049] In some embodiments, the battery pack includes at least two spaced battery cells 51, for example Figure 6 and Figure 7As shown, when the battery cell 51 is a soft package battery cell 51 in a sheet structure, the plurality of battery cells 51 are arranged in parallel with each other, and the water gel assembly 52 is arranged between the two adjacent battery cells 51, that is, the two side surfaces of the water gel assembly 52 are in contact with the opposite surfaces of the two adjacent battery cells 51, respectively, so that the heat conduction capacity can be effectively improved through the surface-to-surface contact. The water gel assembly 52 can isolate the battery cells 51, and when one of the battery cells 51 catches fire, the water gel 523 can isolate the adjacent battery cells 51, and before the water in the water gel 523 is burned out, the temperature of the adjacent battery cells 51 can be limited within a relatively safe temperature range, so as to prevent or delay the thermal runaway of the battery cells 51 adjacent to the battery cell 51 catching fire, thereby improving the safety performance of the battery pack.

[0050] In some embodiments, the battery pack includes at least two water gel assemblies 52, and the side edges of the at least two water gel assemblies 52 are connected. Figure 5 and Figure 6 As shown, when the plurality of battery cells 51 are arranged in parallel with each other, for example, when there are three battery cells 51, two sheet containers can be selected, and at this time, the water gel assembly formed by the two sheet containers is in an n type, that is, one battery cell 51 is arranged in the groove of the water gel assembly and on the outer side surface of the water gel assembly; when there are more battery cells 51, the water gel assembly 52 can be sequentially bent in an S type, and at this time, except for the outermost sheet container, the first and last side edges of each sheet container located in the middle are in communication with the adjacent sheet containers; or the water gel assembly 52 is in a comb type, that is, the side edges on the same side of the sheet containers are in communication with each other; or the upper side edges of two sheet containers are in communication with each other, the left side edges of the other two sheet containers are in communication with each other, or the right side edges are in communication with each other, or the lower side edges are in communication with each other, as long as the side walls of the adjacent two sheet containers are in communication with each other. Through the communication of the plurality of sheet containers, the purpose of cooling the plurality of battery cells 51 by one water gel assembly 52 can be achieved, and when the temperature of one of the battery cells 51 is abnormal, compared with the plurality of independent water gel assemblies 52, the water gel 523 can have more water for vaporization to reduce the temperature of the battery cell 51, thereby improving the safety performance of the battery pack, and the manufacturing cost of the water gel assembly 52 can also be reduced. In addition, for the plurality of independent water gel assemblies 52, the water gel assembly 52 can not pass through the side edge of the battery cell 51, so that the space utilization rate of the battery pack can be improved. In addition, in order to save the cost of the battery pack, two battery cells 51 can be attached together, and only one water gel assembly 52 is arranged on the side surface of the left battery cell and the side surface of the right battery cell, respectively, and the two water gel assemblies 52 are connected at the side edges. In order to improve the convenience of the arrangement of the water gel assembly 52, the plurality of water gel assemblies 52 are integrally formed.

[0051] In some embodiments, the outer side of the hydrogel assembly 52 is attached to the outer side of the battery cell 51 by double-sided adhesive tape, which can facilitate the connection of the hydrogel assembly 52 and the battery cell 51, and the attachment and fixation of the hydrogel assembly 52 and the battery cell 51 can ensure close contact between the two to ensure heat conduction capacity, and can also prevent misalignment between the two, thereby ensuring the structural stability of the battery cell 51 group.

[0052] In some embodiments, the battery pack further comprises a first housing 10, a second housing 20 and a BMS board 30, as shown in Figures 10 to 14 The first housing 10 and the second housing 20 can be selected as a glue shell, which can be formed by injection molding, and the material can be selected from PC, ABS, PC+ABS, PA+GF and other plastic materials. The battery cell 51 is arranged in the first housing 10, and the first housing 10 can be selected as a cubic hollow structure. After a plurality of battery cells 51 are connected to form a battery cell assembly 50, the battery cell assembly 50 is placed in the first housing 10. The first end 11 of the first housing 10 is a solid structure, which is integrally formed with the body structure of the first housing 10, and can play a role of isolating the battery cell 51 and the BMS board 30 and an insulation role. The second end 12 of the first housing 10 is provided with a through hole, and the first end 11 and the second end 12 are two ends of the first housing 10 which are away from each other. The battery cell 51 is placed in the first housing 10 through the through hole. After the battery cell 51 is placed in the first housing 10, the through hole can be plugged. The second foam 54 is arranged between the outermost battery cell 51 and the inner side wall of the first housing 10. During installation, a release film foam can be used, as shown in Figure 16 which specifically includes a foam 541 and a release film 542. The two sides of the foam 541 are provided with double-sided adhesive tape, one side of which is connected with the release film 542. The foam 541 can be selected as a rectangular frame structure, and the size of the release film 542 is greater than that of the foam 541. The front end of the release film 542 exceeds the front end of the foam 541 by a length of not less than 3.5 mm. The rear end of the release film 542 is provided with a handle piece which protrudes from the rear end of the foam 541. After the battery cell 51 is placed in the first housing 10, the handle piece protrudes from the second end 12 of the second housing 20, so as to facilitate the user to pull out the release film 542. During installation, the foam can be first attached to the outer side of the battery cell 51. After the battery cell 51 is placed in the target position of the first housing 10, the release film 542 is pulled out from the through hole of the first housing 10, and the foam is fixed on the inner wall of the first housing 10. The BMS board 30 is connected to the first end 11 of the first housing 10, the second housing 20 is arranged on the first end 11 of the first housing 10, the BMS board 30 is arranged in the second housing 20, and the second housing 20 is provided with a pouring glue injection port 21, as shown in Figure 1 and Figure 2As shown. After the second housing 20 is connected to the first housing 10, potting compound 40 can be injected into the second housing 20 through the potting compound injection port 21 to fill its internal space. This allows for potting of the various devices and connections on the BMS board 30. After the potting compound 40 cures, it forms a whole to protect the tabs 511 in the head region of the battery cell 51, as well as the BMS board 30 and the various devices. The potting method of this application can achieve simultaneous potting of the tabs 511 in the head region of the battery cell 51, the various devices, and the BMS board 30, without the need for separate potting of the BMS board 30. This improves the stability of the BMS at the end of the first housing 10 and within the second housing 20.

[0053] In some embodiments, two adjacent battery cells 51 are connected in series, specifically by connecting tabs 511 together. The positive and negative tabs of two adjacent battery cells 51 are connected by a nickel plate 512, which is connected to the BMS board 30. For example Figure 4 and Figure 5 As shown, after the positive and negative tabs of two adjacent battery cells 51 are connected, a nickel sheet 512 can be placed below the connection point. Then, the three components are welded together using laser welding. The extended portion of the nickel sheet 512 can be connected to the BMS board 30 for communication. This connection method reduces the need for adapter boards. Insulating sheets 56 are provided above the main positive tab and the adjacent series-connected battery cell 51, and above the main negative tab and the adjacent series-connected battery cell 51, to prevent short circuits caused by movement of the main positive and main negative tabs. Figure 5 As shown. After the tabs of the battery cell assembly 50 are soldered, the battery cell assembly 50 is placed inside the first housing 10. The main positive tab, the main negative tab, and the nickel plate 512 pass through the holes provided on the first end 11 of the first housing 10 and are soldered to the BMS board 30 to connect the battery cell assembly 50 and the overcurrent circuit of the BMS board 30. The BMS board 30 is provided with a main positive pad and a main negative pad. Below the main positive tab and the main negative tab of the battery cell assembly 50, there are main tab copper plates 55 respectively. The main tab copper plates 55 are soldered to the main positive tab and the main negative tab, and the two main tab copper plates 55 are soldered together after passing through the first end 11 and the main positive pad and the main negative pad on the BMS board 30. The nickel sheet 512 is bent and soldered to the voltage acquisition pad on the BMS board 30 to establish a circuit channel between the cell assembly 50 and the BMS. This arrangement allows the BMS to be placed directly at the first end 11 of the first housing 10, with only the first end 11 separating the cell assembly 50 and the BMS board 30. This reduces the space required for battery pack stacking and improves the space utilization of the battery pack.

[0054] In some embodiments, such as Figures 4 to 6As shown, a first foam 53 is provided at one end of the positive and negative tabs on two adjacent battery cells 51. The first foam 53 is located in the area enclosed by the positive tab, the negative tab and the end of the battery cell 51. On the one hand, it can support the positive tab and the negative tab, and on the other hand, it can reduce the amount of potting compound 40 used.

[0055] In some embodiments, the BMS board 30 is provided with a button 31, and the BMS board 30 is provided with a surrounding barrier 32 around the button 31. The structure of the barrier 32 is related to the base structure of the button 31 connected to the BMS. For example, when the base of the button 31 is rectangular in the top view, the barrier 32 is also a rectangular frame structure. The barrier 32 is in close contact with the side of the second housing 20 facing the first housing 10. The second housing 20 is provided with a clearance hole 22 for the button 31 to be exposed. Figure 14 As shown. The enclosure 32 prevents the potting compound 40 from intruding into the location of the button 31, thus ensuring that the button 31 can be pressed smoothly by the user. In addition, the BMS also includes LED lights 33, NTC connectors, and FUSE devices. Furthermore, the enclosure 32 is preferably an elastomer, such as foam or soft silicone rubber, and the side of the second housing 20 facing the BMS board 30 has a surrounding edge 23, such as... Figure 13 As shown, the edge 23 is in close contact with the enclosure 32. After the second housing 20 is connected to the first housing 10, the edge 23 will squeeze the enclosure 32, which can ensure that the two are in close contact, thereby effectively preventing the potting compound 40 from entering the space of the enclosure 32.

[0056] In some embodiments, such as Figure 10 As shown, a first buckle 111 is provided on the end face of the first end 11 of the first housing 10 facing the second housing 20. A first snap-fit ​​part that cooperates with the first buckle 111 is provided at the edge position of the BMS board 30. For example, a number of first buckles 111 can be provided at the edge position of the end face of the first end 11. The BMS board 30 can be restricted on the first end face by the first buckles 111 to ensure the connection stability of the BMS board 30.

[0057] In some embodiments, such as Figure 10 As shown, a slot 113 is provided on the outer side of the first end 11 of the second housing 20, such as... Figure 13 As shown, the inner sidewall of the second housing 20 is provided with a second buckle 25 that cooperates with the slot 113. The number of slots 113 and the second buckle 25 can be set according to actual needs. The connection stability between the second housing 20 and the first housing 10 can be improved by the second buckle 25 and the slot 113.

[0058] In some embodiments, the outer side wall of the first end portion 11 is provided with a first step surface 112 which is inwardly retracted, that is, the projection of the first end portion 11 in the top view is within the projection range of the first shell 10 in the top view, and the inner side wall of the second shell 20 is provided with a second step surface 24 which cooperates with the first step surface 112, as shown in Figure 10 and Figure 13 Through the first step surface 112 and the second step surface 24, on the one hand, the second shell 20 can be positioned, and on the other hand, the size can be reduced and the space utilization rate of the battery pack can be improved.

[0059] In some embodiments, as shown in Figure 2 the outer side surface of the second shell 20 is provided with an output terminal 13, one end of the output terminal 13 is provided with a female tab 131 which is connected with an external device, and one end is provided with a straight copper sheet 132 which is connected with the BMS board 30, when assembling, the pad hole position on the BMS board 30 passes through the straight copper sheet 132 and is connected with the BMS board 30 by tin soldering to form a circuit path, and this kind of setting mode can save the setting of the output board and reduce the cost of the battery.

[0060] The utility model embodiment further provides a kind of electric equipment, including the battery pack of any one of the above, electric equipment can be electric tool, for example electric drill, electric saw etc.,It can also be household appliance, for example dust collector, in addition, the electric equipment of the utility model is not limited to the above type electric equipment.According to the battery pack in the above embodiment, the beneficial effects of electric equipment can be referred to, which will not be repeated here.

[0061] It should be noted that in the present specification, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0062] Each embodiment in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between each embodiment can be referred to each other.

[0063] The above provides a kind of battery pack and electric equipment of the utility model in detail.The principle and implementation mode of the utility model are described by applying specific examples in this paper, and the above embodiment is only used to help understand the core idea of the utility model.It should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, some improvements and modifications can be made to the utility model, and these improvements and modifications also fall within the protection scope of the utility model claims.

Claims

1. A battery pack, characterized in that, The battery pack comprises: at least one electric core (51) and a hydrogel assembly (52), the hydrogel assembly (52) is in surface contact with the electric core (51), and a solvent in the hydrogel assembly (52) is vaporized when the heating temperature of the electric core (51) reaches a target temperature, so as to cool the electric core (51).

2. The battery pack according to claim 1, characterized by The hydrogel assembly (52) comprises a film shell and a hydrogel (523), the film shell comprises a first film sheet (521) and a second film sheet (522), the edges of the first film sheet (521) and the second film sheet (522) are heat-sealed, and the space between the first film sheet (521) and the second film sheet (522) contains the hydrogel (523).

3. The battery pack of claim 1, wherein, At least one face of each electric core (51) is provided with the hydrogel assembly (52).

4. The battery pack of claim 1, wherein, The battery pack comprises at least two electric cores (51), and the hydrogel assembly (52) is arranged between adjacent electric cores (51) in the thickness direction of the electric cores (51).

5. The battery pack of claim 1, wherein, The battery pack comprises at least two hydrogel assemblies (52), and the side edges of the at least two hydrogel assemblies (52) are connected.

6. The battery pack of claim 5, wherein, A plurality of hydrogel assemblies (52) are integrally formed.

7. The battery pack according to any one of claims 1 to 6, characterized by, The battery pack further comprises a first shell (10), a second shell (20) and a BMS plate (30), the electric core (51) is arranged in the first shell (10), the BMS plate (30) is connected to a first end (11) of the first shell (10), the second shell (20) is arranged on the first end (11) of the first shell (10), the BMS plate (30) is located in the second shell (20), and a sealant injection inlet (21) is arranged on the second shell (20).

8. The battery pack of claim 7, wherein, A button (31) is arranged on the BMS plate (30), a fence (32) surrounding the button (31) is arranged on the BMS plate (30), the fence (32) is in close contact with one side of the second shell (20) facing the first shell (10), and a relief hole (22) is arranged on the second shell (20) to expose the button (31).

9. The battery pack of claim 8, wherein, The fence (32) is an elastic body, one side of the second shell (20) facing the BMS plate (30) is provided with a surrounding edge (23), and the surrounding edge (23) is in close contact with the fence (32).

10. An electric device, characterized by The battery pack of any one of claims 1 to 9 is included.

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