Electricity storage device and electric equipment with same

Abstract

The utility model relates to an electricity storage device and electric equipment with the same. The power storage device comprises a shell, a plurality of battery cells, a tab bracket, a nut, an electric cover plate assembly and a bolt. The shell comprises a plurality of side walls and a bottom wall, and the side walls and the bottom wall jointly define a containing cavity. And the plurality of battery cells are stacked in the accommodating cavity along the height direction of the shell. The tab bracket comprises a bracket body, a busbar and a supporting seat, the tab bracket is positioned on one side, provided with the tabs, of the battery cells, and the bracket body is connected with the tabs. In the height direction, the supporting seat is integrally arranged on the upper side of the support body, the supporting seat is provided with a containing cavity, one end of the busbar is electrically connected with the tab, and the other end of the busbar is located on the supporting seat. The nut is arranged in the containing cavity in a rotation stopping mode. The electric cover plate assembly is located on the sides, back to the bottom wall, of the multiple battery cells, and the bolts penetrate through the electric cover plate assembly and the busbar to be connected with the nuts. The nut is arranged in the accommodating cavity from the direction except the lower side of the accommodating cavity, so that the nut can be prevented from falling off in the mounting process and being in contact with the battery cell to cause a short-circuit risk.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy technology field, especially, relate to a kind of power storage device and the electric equipment with it. BACKGROUND

[0002] Power storage device, for example battery pack, is important component in electric equipment, for example vehicle. Power storage device includes multiple battery cells, and battery cell is energy storage unit of power storage device.

[0003] In the process of installing power storage device, it is easy to cause damage to electric equipment. For example, when installing power storage device, some components of power storage device accidentally contact with battery cell, resulting in short circuit. Therefore, the demand for improving the safety of power storage device during installation has always existed. SUMMARY

[0004] Therefore, the utility model provides a kind of power storage device and the electric equipment with it, to improve the safety of power storage device.

[0005] In one aspect, the utility model embodiment provides a kind of power storage device. The power storage device includes shell, multiple battery cells, tab support, nut, electric cover plate assembly and bolt. The shell includes multiple side walls and bottom wall, and multiple side walls and bottom wall are collectively enclosed to form a containing cavity with opening. Multiple battery cells are stacked in the containing cavity along the height direction of the shell. The tab support includes support body, busbar and support seat, and the tab support is located at the side of multiple battery cells provided with tab. The support body is connected with the tab. Along the height direction, the support seat is integrally formed on the upper side of the support body, and the support seat is provided with a cavity. One end of the busbar is electrically connected with the tab, and the other end extends to the support seat. The nut is rotatably and slidably arranged in the cavity along the height direction. The electric cover plate assembly is arranged on the opening. The bolt passes through the electric cover plate assembly and the busbar and is connected with the nut to electrically connect the busbar with the electric cover plate assembly.

[0006] According to the utility model embodiment, the support seat and the support body are integrally formed, and the lower side of the cavity is closed by the support body. Therefore, the nut needs to be loaded into the cavity from the direction other than the lower side of the cavity. This avoids the risk of short circuit caused by the nut falling and contacting with the battery cell during installation, thereby improving the safety of the power storage device.

[0007] As a possible implementation manner, the support seat is provided with a mounting port communicating with the cavity on one side surface in the first direction. The mounting port is located on the side of the support seat facing the main body of the battery cell in the first direction. In the projection plane perpendicular to the first direction, the orthographic projection area of the nut is smaller than the orthographic projection area of the mounting port, and the first direction is perpendicular to the height direction.

[0008] For the two sides of the support seat in the first direction, the side where the cell body is located has a larger size, so that when the nut is loaded from the side where the cell body is located, sufficient operation space can be provided for the operator, which can effectively reduce the installation difficulty.

[0009] As a possible implementation manner, the support seat is further provided with a sealing plate, which at least partially seals the installation opening.

[0010] After the nut is loaded into the cavity, the side of the support seat provided with the installation opening is injection molded to form the sealing plate. When the sealing plate is configured to at least partially seal the installation opening, the nut can be prevented from falling out. By injection molding the sealing plate, the steps of sealing and fixing the nut can be completed at one time during the manufacturing process, thereby reducing the steps of later installation.

[0011] As a possible implementation manner, the power storage device further comprises a thermal insulation pad, which is located between the plurality of battery cells and the electric cover plate assembly in the height direction, the support seat is located on the upper side of the thermal insulation pad, and the distance from the edge of the support body to the support body of the thermal insulation pad is less than the minimum size of the nut.

[0012] The thermal insulation pad is located between the plurality of battery cells and the electric cover plate assembly, that is, between the circuit boards in the plurality of battery cells and the electric cover plate assembly. Therefore, the thermal insulation pad can block the heat generated by the battery cells during operation from being transmitted to the circuit board, thereby ensuring the safety of the circuit board. On the other hand, since the distance from the support body to the thermal insulation pad is less than the minimum size of the nut, the nut cannot pass through the gap between the thermal insulation pad and the support body during the downward falling process, but is blocked on the upper side of the thermal insulation pad, thereby ensuring the safety of the power storage device.

[0013] As a possible implementation manner, the support seat is provided with a buckle at the installation opening, and the nut and the buckle partially overlap in the orthogonal projection in the projection plane perpendicular to the first direction.

[0014] When loading the nut into the cavity, the buckle needs to be forced to elastically yield first, until the nut and the buckle do not overlap in the orthogonal projection in the projection plane perpendicular to the first direction. At this time, the nut can be smoothly loaded into the cavity through the installation opening. After the nut is loaded, the buckle returns to the initial position, that is, the nut and the buckle partially overlap in the orthogonal projection in the projection plane perpendicular to the first direction. The part of the buckle overlapping with the nut in the projection plane will block the nut from falling out through the installation opening. In this way, the installation process of the nut does not require additional tools or complex steps, and therefore this implementation manner can reduce the assembly difficulty.

[0015] As a possible implementation manner, the support base is provided with a side wall on one side in a second direction perpendicular to the first direction and the height direction, the side wall is provided with a notch, the buckle comprises an arm portion and a protruding portion, the arm portion is located in the notch and connected to the side wall at one end, and the protruding portion is arranged at the other end of the arm portion and protrudes from the arm portion towards the side where the nut is located in the second direction.

[0016] The design of the notch can provide space for deformation of the arm portion, and the arm portion can elastically yield after being stressed, thereby allowing the nut to be smoothly loaded into the cavity. After the nut is loaded, the arm portion returns to the initial position, and at this time, the protruding portion can block the nut from being pulled out through the mounting opening, thereby ensuring the stability of the nut installation.

[0017] As a possible implementation manner, the tab support is further provided with a reinforcing rib integrally formed with the support body and the support base, and the reinforcing rib is connected to the support body and the support base.

[0018] The reinforcing rib can provide additional support for the support body and the support base, avoid deformation or damage of the support body and the support base when they are subjected to external force or vibration, and thereby enhance the connection stability between them.

[0019] As a possible implementation manner, the bus bar comprises a plurality of layers of laminated copper foils.

[0020] The copper foils are relatively soft, and therefore the bus bar formed by laminating and pressure welding a plurality of layers of copper foils can have good ductility and bending performance. In this way, when the bus bar is installed, the bus bar can be bent or twisted according to the needs of the installation space. In addition, when the bus bar is electrically connected to the circuit board, the copper foils can also absorb installation tolerances to ensure the performance of the electrical connection, and in addition, the copper foils can also absorb vibrations and impacts during use to reduce the influence of adverse stresses on the bus bar or the circuit board.

[0021] As a possible implementation manner, the support body comprises an upper side wall, the support base protrudes upward from the upper side wall, the tab support further comprises a bus bar electrically connected to the tab, a portion of the bus bar is located on the upper side of the upper side wall, the bus bar comprises a first terminal portion, a second terminal portion and a third terminal portion, the first terminal portion is located on the upper side of the upper side wall and electrically connected to the tab, the second terminal portion is located on the upper side of the support base and electrically connected to the circuit board, and the third terminal portion extends between the first terminal portion and the second terminal portion in the height direction.

[0022] According to the embodiment of the present application, the support seat extends the support body, and can provide support for the busbar and the circuit board. In this way, when the busbar and the circuit board are electrically connected, no additional support structure is needed, so that the number of components can be reduced, and the production cost can be reduced. On the other hand, since the third terminal portion extends between the first terminal portion and the second terminal portion in the height direction, the busbar as a whole has a longer lever arm. When the busbar is subjected to adverse stress, the deformation of the first terminal portion and the second terminal portion can be reduced, and the stability of the electrical connection can be ensured.

[0023] On the other hand, the utility model embodiment further provides a kind of electric equipment, which includes the power storage device of the above aspect. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed to be used in the embodiment.

[0025] It should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as limiting the scope.

[0026] It should also be understood that the same or similar reference signs are used to represent the same or similar elements in the drawings.

[0027] It should also be understood that the drawings are only schematic, and the size and proportion of the elements in the drawings are not necessarily accurate.

[0028] Figure 1 is the structure schematic view of the power device according to an embodiment of the present application.

[0029] Figure 2 is Figure 1 the structure schematic view of the power storage device in

[0030] Figure 3 is Figure 2 the exploded schematic view of the power storage device in

[0031] Figure 4 is Figure 2 the partial structure schematic view in

[0032] Figure 5 is Figure 2 the side view of the battery cell and the tab support in

[0033] Figure 6 is Figure 5 the structure schematic view of part A in

[0034] Figure 7 is Figure 2 the structure schematic view of the battery cell and the tab support in

[0035] Figure 8 is a structural diagram of the nut and the tab holder in Figure 2

[0036] Figure 9 is a structural diagram of the nut and the tab holder in Figure 8

[0037] Figure 10 is a structural diagram of the nut and the tab holder in Figure 2

[0038] Figure 11A and Figure 11B is a structural diagram of the nut and the tab holder in Figure 2

[0039] Figure 12 is a structural diagram of the nut and the tab holder in another embodiment of the utility model. DETAILED DESCRIPTION

[0040] The embodiments of the utility model will be described in a demonstrative manner below with reference to the drawings. It should be understood that the implementation manners of the utility model can be various, and should not be interpreted as being limited to the embodiments described herein, and the embodiments described herein are only for a more thorough and clear understanding of the utility model.

[0041] With reference to Figure 1 , the utility model provides a kind of electric equipment 200. For example, the electric equipment 200 provided by the utility model can be car. Of course, the electric equipment 200 provided by the utility model is not limited to car. The utility model provides that the electric equipment 200 of the utility model can be any type of electric equipment. For example, the electric equipment 200 can be emergency power equipment, electric tool, energy storage power station, industrial electric equipment etc.

[0042] The electric storage device 100 provided by the utility model can be start-stop battery pack, low-voltage battery pack, power battery pack, energy storage module etc.

[0043] With reference to Figures 1 to 3 , the electric equipment 200 includes electric storage device 100. Electric storage device 100 includes shell 10, multiple electric cores 20 and tab holder 30. Shell 10 includes four side walls 11 and bottom wall 12, and four side walls 11 and bottom wall 12 are enclosed to form accommodating cavity 13 with opening 14. Multiple electric cores 20 are stacked in accommodating cavity 13 along the height direction of shell 10. In combination with Figure 4 and Figure 5 ​​​​Each of the plurality of battery cells 20 includes a cell body 21 and a tab 22. The tab holder 30 is located on the side of the plurality of battery cells 20 where the tabs 22 are located. The tab holder 30 includes a holder body 31, a busbar 32, and a support seat 33. The holder body 31 is connected to the tabs 22. The support seat 33 is integrally formed on the upper side of the holder body 31 in the height direction. The support seat 33 is provided with a cavity 331. One end of the busbar 32 is electrically connected to the tabs 22, and the other end extends to the support seat 33.

[0044] With reference to Figure 3 The power storage device 100 further includes an upper cover 41 covering the opening 14. The upper cover 41 is provided with a first mounting hole 411 through which the fastener 70 can fix the upper cover 41 to the side wall 11.

[0045] With reference to Figure 3 The power storage device 100 is further provided with a battery management system (BMS). The battery management system includes a circuit board 42. The battery management system is used to monitor and manage the operating state of the battery cells, such as voltage, current, temperature, etc. When the battery management system detects that the operating state of a certain battery cell is abnormal, the circuit board 42 in the battery management system will execute the corresponding protection measures according to the set protection strategy. For example, when the voltage reaches the set overcharge voltage, the circuit board will control the switch to open, cutting off the charging circuit to prevent overcharging of the battery; when the voltage is lower than the set lower limit of discharge, the circuit board will control the switch to open the load, limiting the flow of current to avoid over-discharge. Similarly, when the temperature of the battery cell is too high, the circuit board will reduce the charging or discharging rate to ensure that the temperature of the battery is maintained within a safe range. If the temperature continues to rise, the circuit board will control the switch to open the load to prevent the temperature from continuing to rise.

[0046] The circuit board 42 can be installed outside the accommodation cavity 13 or in the accommodation cavity 13. In some power storage devices 100, in order to avoid the direct influence of the external environment on the circuit board 42, the circuit board 42 is installed in the accommodation cavity 13. With reference to Figure 3 The upper cover 41 is recessed upward and covers the circuit board 42. The upper cover 41 and the circuit board 42 together constitute an electric cover plate assembly 40. The electric cover plate assembly 40 is located on the side of the plurality of battery cells 20 away from the bottom wall 12. Combining the circuit board 42 with the upper cover 41 to form the electric cover plate assembly 40 can reduce the number of parts, which is conducive to the compactness of the power storage device 100.

[0047] It should be noted that the electric cover plate assembly 40 can be a power distribution unit (PDU, also known as an intelligent electrical box).

[0048] Alternatively, the upper cover 41 may have an internal cavity in which the circuit board 42 is located. In this way, the portion of the upper cover 41 facing the battery cell 20 can prevent heat generated by the battery cell 20 during operation from being transferred to the circuit board 42, thereby ensuring the safety and reliability of the circuit board 42. Furthermore, when the height of multiple battery cells 20 stacked exceeds the side wall 11 of the housing 10, the multiple battery cells 20 and a portion of the tab support 30 will be housed inside the upper cover 41. If the upper cover 41 exposes the circuit board 42, the tab support 30 may come into contact with the circuit board 42 and cause damage after the upper cover 41 is placed over the opening 14. If the circuit board 42 is located within the cavity, the portion of the upper cover 41 facing the battery cell 20 can isolate the circuit board 42 from the tab support 30 during installation, preventing damage to the circuit board 42 from the tab support 30.

[0049] To implement the protection strategies in the battery management system, circuit board 42 needs to be electrically connected to bus 32. (See reference) Figure 3 , Figure 7 and Figure 10 The energy storage device 100 also includes a nut 50 and a bolt 60. The nut 50 is anti-rotatingly disposed in the cavity 331. The circuit board 42 is provided with a second mounting hole 421. The bolt 60 passes through the second mounting hole 421 and the busbar 32 and is connected to the nut 50, thereby electrically connecting the busbar 32 to the circuit board 42.

[0050] According to the embodiment of this utility model, the support base 33 is integrally formed with the bracket body 31, and the lower side of the cavity 331 is closed by the bracket body 31. Therefore, the nut 50 needs to be installed into the cavity 331 from a direction other than the lower side of the cavity 331. This avoids the risk of the nut 50 falling off during installation and coming into contact with the battery cell 20, thus improving the safety of the energy storage device 100.

[0051] refer to Figure 4 and Figure 5 The support body 31 includes an upper sidewall 311, a support base 33 protruding upward from the upper sidewall 311, and a portion of the busbar 32 located on the upper side of the upper sidewall 311. Figure 10 The busbar 32 includes a first terminal portion 321, a second terminal portion 322 and a third terminal portion 323. The first terminal portion 321 is located on the upper side of the upper sidewall 311 and is electrically connected to the tab 22. The second terminal portion 322 is located on the upper side of the support base 33 and is electrically connected to the circuit board 42. The third terminal portion 323 extends along the height direction between the first terminal portion 321 and the second terminal portion 322.

[0052] According to the embodiment of the utility model, support seat 33 as the extension of support body 31 can provide support for busbar 32 and circuit board 42. In this way, when electrically connecting busbar 32 and circuit board 42, no additional support structure is needed, thus the number of components can be reduced and the production cost can be lowered. On the other hand, since third terminal portion 323 extends between first terminal portion 321 and second terminal portion 322 in the height direction, the overall busbar 32 has a longer lever arm. When busbar 32 is subjected to adverse stress, the deformation of first terminal portion 321 and second terminal portion 322 can be reduced, thereby ensuring the stability of the electrical connection.

[0053] With reference to Figure 4 , third terminal portion 323 can be sleeved with an insulating sleeve 36. The insulating sleeve 36 can effectively isolate the current and prevent current leakage. By sleeving the third terminal portion 323 with the insulating sleeve 36, accidental contact between other metal components and busbar 32 during installation can be avoided, thereby preventing short circuit. This implementation can reduce the risk of electrical failure and ensure stable operation of the battery cell 20.

[0054] For example, busbar 32 can include multiple layers of laminated copper foil. The copper foil is relatively soft in texture, so the busbar 32 formed by laminating multiple layers of copper foil and then pressure welding can have good ductility and bending performance. During installation of busbar 32, busbar 32 can be bent or twisted as needed according to the installation space. In addition, when busbar 32 is electrically connected to circuit board 42, the copper foil can also absorb installation tolerances to ensure the performance of the electrical connection. Furthermore, the copper foil can also absorb vibrations and impacts during use to reduce the impact of adverse stress on busbar 32 or circuit board 42.

[0055] It can be understood that in some other embodiments, busbar 32 can also be made of other conductive materials, and the utility model does not make special limitations thereon. For example, busbar 32 can be made of aluminum or copper-aluminum alloy.

[0056] With reference to Figure 7 , support seat 33 is provided with a mounting opening 332 communicating with the cavity 331 on one side surface in the first direction, and the mounting opening 332 is located on the side of support seat 33 in the first direction facing the cell body 21 of the plurality of battery cells 20. In the projection plane perpendicular to the first direction, the orthogonal projection area of the nut 50 is smaller than the orthogonal projection area of the mounting opening 332. For both sides of the support seat 33 in the first direction, the side where the cell body 21 is located has a larger size, so when the nut 50 is installed from the side where the cell body 21 is located, sufficient operating space can be provided for the operator, which can effectively reduce the installation difficulty.

[0057] It can be understood that the above orientation description is relative rather than absolute. When the elements in the utility model are in the placement posture and placement position shown in the figure, these orientation descriptions are applicable. In the drawings of the utility model, the arrow Z+ and the arrow Z- are used to indicate the relative two sides of the height direction, that is, the up-down direction; the arrow X is used to indicate the first direction, and the first direction is perpendicular to the height direction; the arrow Y is used to indicate the second direction, and the second direction is perpendicular to both the first direction and the height direction.

[0058] With reference to Figure 7 The lug support 30 is further provided with a reinforcing rib 34 formed integrally with the support body 31 and the support seat 33, and the reinforcing rib 34 is connected with the support body 31 and the support seat 33. The reinforcing rib 34 can provide additional support for the support body 31 and the support seat 33, so as to avoid deformation or damage of the support body 31 and the support seat 33 when they bear external force or vibration, thereby enhancing the connection stability between them.

[0059] With reference to Figure 7 The support seat 33 is provided with a buckle 35 at the mounting opening 332. In the projection plane perpendicular to the first direction, the normal projection of the nut 50 overlaps the normal projection of the buckle 35. When the nut 50 is installed into the accommodating cavity, the buckle 35 needs to be forced to elastically yield first, until the normal projection of the nut 50 does not overlap the normal projection of the buckle 35 in the projection plane perpendicular to the first direction. At this time, the nut 50 can be smoothly installed into the accommodating cavity through the mounting opening 332. After the nut 50 is installed, the buckle 35 returns to the initial position, that is, the normal projection of the nut 50 overlaps the normal projection of the buckle 35 in the projection plane perpendicular to the first direction. The part of the buckle 35 overlapping the nut 50 in the projection plane can block the nut 50 from being pulled out through the mounting opening 332. In this way, the installation process of the nut 50 does not require additional tools or complex steps, and therefore this implementation manner can reduce the assembly difficulty.

[0060] With reference to Figure 8 The support seat 33 is provided with a support side wall 334 on one side in the second direction, and the support side wall 334 is provided with a gap 335. The buckle 35 includes an arm portion 351 and a protruding portion 352, the arm portion 351 is located in the gap 335 and connected with the support side wall 334 at one end, and the protruding portion 352 is arranged at the other end of the arm portion 351 and protrudes from the arm portion 351 towards the side where the nut 50 is located in the second direction. The design of the gap 335 can provide a deformation space for the arm portion 351, and the arm portion 351 can elastically yield after being stressed, thereby allowing the nut 50 to be smoothly installed into the accommodating cavity 331. After the nut 50 is installed, the arm portion 351 returns to the initial position, and at this time the protruding portion 352 can block the nut 50 from being pulled out through the mounting opening 332, thereby ensuring the stability of the installation of the nut 50.

[0061] As a possible implementation, the thickness of the arm portion 351 can be less than the thickness of the support side wall 334. With the reduced thickness, the arm portion 351 has reduced rigidity and increased elasticity, and is thus more likely to elastically deform. In this way, the force that needs to be applied during assembly can be reduced, and the assembly efficiency can be improved.

[0062] With reference to Figure 9 , the protrusion 352 has a blocking surface 3521 on the side facing the nut 50 and a guiding surface 3522 on the side away from the nut 50, the nut 50 has a nut side surface 51 facing the blocking surface 3521, the blocking surface 3521 and the nut side surface 51 are perpendicular to the first direction, and the guiding surface 3522 gradually decreases in distance to the blocking surface 3521 along the second direction as it approaches the nut 50. The guiding surface 3522 can provide an operating surface for an operator, and when the nut 50 is being installed, contacting the guiding surface 3522 and pushing the guiding surface 3522 away from the nut 50 can cause the buckle 35 to elastically yield, allowing the nut 50 to be loaded into the cavity 331 through the installation opening 332. After the nut 50 is loaded, the operator disengages from the guiding surface 3522, and the buckle 35 will return to the initial position, so that the blocking surface 3521 faces the nut side surface 51. In this way, when the nut 50 moves towards the installation opening 332 and contacts the blocking surface 3521, the blocking surface 3521 can block the nut 50 from continuing to move towards the installation opening 332, preventing it from being ejected through the installation opening 332.

[0063] It can be understood that, with reference to Figure 7 and Figure 8 , one side of the support seat 33 in the second direction has two support side walls 334a and 334b, one of which is formed with the support body 31 as a reinforcing rib 34, and the other of which is provided with a notch 335. In this way, the buckle 35 can be formed on the support side wall, and the connection strength of the support body 31 and the support seat 33 can be increased. In order to ensure the structural strength of the support seat 33, the support side wall of the support seat 33 that is formed with the reinforcing rib can no longer be provided with a notch.

[0064] Further, in combination with Figure 4 , the first terminal portion 321 of the busbar 32 is located on the upper side wall 311, the second terminal portion 322 is located on the upper side of the support seat 33, and the third terminal portion 323 extends between the first terminal portion 321 and the second terminal portion 322 in the height direction. In order to avoid the third terminal portion 323 being pressed and deformed or damaged by the reinforcing rib 34 when subjected to external force or vibration, the third terminal portion 323 can be located on the side of the support seat 33 close to the support side wall 334a.

[0065] As a possible implementation, the nut 50 can be a floating nut 50, with reference toFigure 11A and Figure 11B When connected with the bolt 60, the floating nut 50 can slide in the accommodating cavity 331 to compensate for the deviation caused by the tolerance of parts or assembly error.

[0066] Figure 11A and Figure 11B Two positions of the nut 50 sliding in the accommodating cavity 331 are shown. Referring to Figure 11A A part of the nut 50 abuts against the support seat 33, so that the upward displacement is limited, and this position is the highest position of the nut 50 sliding. At this time, the buckle 35 has a coinciding part with the nut 50 in the projection plane perpendicular to the first direction (i.e. the plane shown in the figure), so that the buckle 35 can block the nut 50 from escaping through the mounting opening 332. Figure 11B The bottom of the nut 50 abuts against the bottom of the accommodating cavity 331, and this position is the lowest position of the nut 50 sliding. At this time, the buckle 35 also has a coinciding part with the nut 50 in the projection plane perpendicular to the first direction, so that the buckle 35 can block the nut 50 from escaping through the mounting opening 332.

[0067] In the embodiment of the utility model, the buckle 35 can block the nut 50 from escaping through the mounting opening 332 when the nut 50 is in the highest position and the lowest position. To achieve the above-mentioned purpose, it is necessary to limit the position of the buckle 35 relative to the accommodating cavity 331. Referring to Figure 11A In the height direction, the distance from the buckle 35 to the top of the accommodating cavity 331 is D1, and the distance from the buckle 35 to the bottom of the accommodating cavity 331 is D2, and D1 and D2 can satisfy: 0.8≤D1 / D2≤1.2. It can be understood that D1 can be the distance from the midpoint of the buckle 35 in the height direction to the top of the accommodating cavity 331, and D2 can be the distance from the midpoint of the buckle 35 in the height direction to the bottom of the accommodating cavity 331.

[0068] It can be understood that there are many ways to block the nut 50 from escaping through the mounting opening 332, and the utility model does not make special limitation thereon. As an example, referring to Figure 12 In the power storage device 100a (the complete structure thereof is not shown in the figure), the support seat 33 can be provided with an enclosing plate 333 at the mounting opening 332, and the enclosing plate 333 partially encloses the mounting opening 332. After the nut 50 is installed in the accommodating cavity 331, the side of the support seat 33 provided with the mounting opening 332 is injection molded to form the enclosing plate 333. When the enclosing plate 333 is configured to at least partially enclose the mounting opening 332, the floating nut 50 can be prevented from escaping. By means of injection molding the enclosing plate 333, the steps of enclosing and fixing the nut 50 can be completed at one time during the manufacturing process, so as to reduce the steps of later installation.

[0069] Back to Figure 3The energy storage device 100 further comprises a heat insulation pad 80, which is located between the plurality of battery cells 20 and the electric cover plate assembly 40 in the height direction, and the supporting seat 33 is located on the upper side of the heat insulation pad 80. The heat insulation pad 80 is located between the plurality of battery cells 20 and the electric cover plate assembly 40, that is, between the plurality of battery cells 20 and the circuit board 42. Therefore, the heat insulation pad 80 can block the heat generated by the battery cells 20 during operation from being transmitted to the circuit board 42, thereby ensuring the safety of the circuit board 42.

[0070] It can be understood that the material of the heat insulation pad 80 needs to have good heat insulation performance. The optional materials include ceramic, silica gel, polytetrafluoroethylene, or ceramic fiber cloth composite silicone rubber, etc. The present application does not make special limitations on this.

[0071] Further, referring to Figure 5 and Figure 6 , the distance D3 from the edge of the heat insulation pad 80 to the support body 31 is less than the minimum size of the nut 50. Since the distance D3 from the heat insulation pad 80 to the support body 31 is less than the minimum size of the nut 50, the nut 50 cannot pass through the gap between the heat insulation pad 80 and the support body 31 during the falling process, but is blocked on the upper side of the heat insulation pad 80, thereby ensuring the safety of the energy storage device 100.

[0072] It should be noted that the minimum size of the nut 50 refers to the minimum distance between any two points on the edge of the nut 50 in the projection of the nut 50 on any plane.

[0073] It should be understood that the term "comprising" and its variants used in the embodiments of the present application are open and inclusive, i.e. "including but not limited to". The term "according to" is "at least partially according to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least another embodiment".

[0074] It should be understood that although the terms "first" or "second" and the like can be used to describe various elements (such as the first terminal part and the second terminal part) in the embodiments of the present application, these elements are not set by these terms, and these terms are only used to distinguish one element from another.

[0075] The protection scope of the embodiments of the present application is not limited to the above-mentioned embodiments, and any person skilled in the art can think of changes or replacements within the technical range disclosed by the embodiments of the present application, which should be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. An electrical energy storage device, characterized by, The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device.

2. The power storage device according to claim 1, wherein The application relates to a power storage device. The application relates to a power storage device.

3. The power storage device according to claim 2, wherein The application relates to a power storage device.

4. The power storage device according to claim 2, wherein The application relates to a power storage device.

5. The power storage device according to claim 2, wherein The application relates to a power storage device.

6. The power storage device according to claim 5, wherein The application relates to a power storage device.

7. The power storage device according to claim 1, wherein The application relates to a power storage device.

8. The power storage device according to claim 1, wherein The application relates to a power storage device.

9. The power storage device according to claim 1, wherein The application relates to a power storage device. The application relates to a power storage device.

10. An electric device, characterized by The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a power storage device. The application relates to a

Images