Battery shell assembly, single battery and battery pack

Abstract

The utility model provides a battery shell assembly, a single battery and a battery pack, the battery shell assembly comprises a battery shell body, the battery shell body is provided with an inner cavity opening, a shell inner cavity and a positioning part arranged in the shell inner cavity, and the positioning part extends from one side of the inner cavity opening to one side far away from the inner cavity opening; and the supporting frame body is provided with a matching part, the matching part is matched with the positioning part in an inserted mode, and the supporting frame body can slide along the positioning part. Meanwhile, the utility model further discloses a single battery applying the battery shell assembly and a battery pack applying the single battery, and the technical problem that an existing support frame is easy to incline or break in the process of being assembled into the shell is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery shell subassembly, single battery and battery package. BACKGROUND

[0002] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable important role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing, and batteries, as core components of new energy vehicles, have high requirements in terms of use safety and service life.

[0003] In related technologies, the battery usually includes a shell and a support frame, such as the battery monomer, battery and electric device disclosed in the authorized announcement CN219123423U published on June 2, 2023. Since the size of the support frame is adapted to the size of the inner cavity of the shell, the inclination or jamming phenomenon is easily generated during assembly, and correcting the support frame will affect the assembly efficiency. SUMMARY

[0004] The embodiments of the utility model provide a battery shell subassembly, single battery and battery package, which can improve the technical problem that the existing support frame is easily inclined or broken during assembly into the shell.

[0005] In a first aspect, the embodiments of the utility model provide a battery shell subassembly, comprising:

[0006] A battery shell body is provided with a shell inner cavity and an inner cavity opening communicating with the shell inner cavity, and is also provided with a positioning part arranged in the shell inner cavity, which extends from one side of the inner cavity opening to the side away from the inner cavity opening.

[0007] A support frame body is provided with a matching part, the matching part is inserted and matched with the positioning part, and the support frame body can slide along the positioning part.

[0008] In an embodiment, the positioning part is configured as a guide rib, and the matching part is configured as a positioning groove.

[0009] In an embodiment, the battery shell body includes a battery shell top wall and a battery shell side wall extending along the circumference of the battery shell top wall. The end of the battery shell side wall away from the battery shell top wall surrounds the inner cavity opening, and the inner cavity opening is arranged opposite to the battery shell top wall. The guide rib extends from the side close to the inner cavity opening to the battery shell top wall.

[0010] In one embodiment, the number of the guide ribs is configured to be two, the two guide ribs are arranged opposite to each other, and a positioning groove is provided at each end of the support frame, and each guide rib is inserted into the corresponding positioning groove.

[0011] In one embodiment, the thickness dimension T of the guide rib is 0<T<0.2mm.

[0012] In one embodiment, an electrode opening is provided on the battery shell body, and the battery shell body further includes an auxiliary positioning wall surrounding the electrode opening, wherein the auxiliary positioning wall is used to abut against the electrode terminal to constrain the electrode terminal in the electrode opening.

[0013] In one embodiment, along the extension direction of the electrode opening, the auxiliary positioning wall includes an opening circumferential side wall and an opening end side wall, the opening circumferential side wall is the side wall of the electrode opening extending in the circumferential direction, and the opening end side wall protrudes toward the inner side of the electrode opening, the opening circumferential side wall is used to abut the circumferential side surface of the electrode terminal, and the opening end side wall is used to receive the end face of the electrode terminal.

[0014] In a second aspect, an embodiment of the present invention provides a single battery, comprising:

[0015] The battery housing assembly described above;

[0016] An electrode assembly is arranged in the battery shell body of the battery shell assembly, and the support frame of the battery shell assembly is located between the electrode assembly and the battery shell top wall of the battery shell body.

[0017] In one embodiment, the electrode terminal includes a plastic part, a terminal pressing block, a sealing ring and a welding ring base, the terminal pressing block is embedded in the welding ring base, the sealing ring is arranged between the welding ring base and the terminal pressing block, the plastic part is sleeved on the welding ring base, and the welding ring base abuts against the auxiliary positioning wall of the battery shell assembly and is fixed to the battery shell body of the battery shell assembly.

[0018] In one embodiment, the battery shell body is provided with a pressure relief hole, the single battery further includes an explosion-proof valve assembly covering the pressure relief hole, the support frame includes a pressure relief vent portion facing the pressure relief hole, and the pressure relief vent portion is provided with multiple pressure relief vent holes.

[0019] In a third aspect, an embodiment of the present invention provides a battery pack comprising the above-mentioned single battery.

[0020] Beneficial effects of the embodiments of the present utility model:

[0021] In the embodiment of the utility model, through the cooperation between the guiding convex rib arranged on the battery shell body and the positioning groove on the support frame body, the positioning and guiding of the support frame body during the assembling process can be realized, the smoothness and stability of the support frame body during the assembling process are improved, and the assembling precision is improved at the same time, thereby the technical problems that the existing support frame is prone to tilting or breaking during the assembling into the shell body are solved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0023] Figure 1 It is the partial explosion structure diagram of the battery shell assembly provided by the embodiment of the utility model;

[0024] Figure 2 It is the three-dimensional schematic diagram of the battery shell body in the embodiment of the utility model;

[0025] Figure 3 It is the top view schematic diagram of the battery shell body in the embodiment of the utility model;

[0026] Figure 4 It is Figure 3 The sectional view schematic diagram of A-A in the embodiment of the utility model;

[0027] Figure 5 It is Figure 4 The local enlarged view of B in the embodiment of the utility model;

[0028] Figure 6 It is the three-dimensional schematic diagram of the support frame body in the embodiment of the utility model;

[0029] Figure 7 It is the top view schematic diagram of the support frame body in the embodiment of the utility model;

[0030] Figure 8 It is Figure 7 The sectional view schematic diagram of C-C in the embodiment of the utility model;

[0031] Figure 9 It is Figure 7 The local enlarged view of D in the embodiment of the utility model;

[0032] Figure 10 It is the three-dimensional schematic diagram of the single battery provided by the embodiment of the utility model;

[0033] Figure 11 It is the overall explosion diagram of the single battery provided by the embodiment of the utility model;

[0034] Figure 12 is a top view schematic diagram of a single battery provided by the embodiment of the utility model;

[0035] Figure 13 is Figure 12 a cross-sectional schematic diagram of E-E in the middle;

[0036] Figure 14 is the overall explosion view of the electrode terminal in the embodiment of the utility model;

[0037] Figure 15 is Figure 2 the local enlarged view at F.

[0038] Icon: 1-battery shell body, 11-cavity in the shell, 12-guiding convex rib, 13-battery shell top wall, 14-battery shell side wall, 15-electrode access, 151-positive electrode access, 152-negative electrode access, 16-access peripheral side wall, 17-access end side wall, 2-support frame body, 21-positioning recess, 22-tab accommodating area, 221-upper accommodating cavity, 222-lower accommodating cavity, 23-pressure relief exhaust part, 24-pressure relief exhaust hole, 3-shell end cover, 31-liquid injection oil hole, 4-liquid injection sealing plug, 5-electrode terminal, 51-positive electrode terminal, 52-negative electrode terminal, 53-plastic part, 531-external access, 54-terminal pressing block, 55-sealing ring, 56-welding ring base, 561-conducting access, 57-insulating patch, 6-electrode assembly, 7-tab connecting piece, 71-terminal connecting part, 72-core package connecting part, 73-tab connecting part, 8-battery insulating part, 9-explosion-proof valve assembly. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with 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 other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. In addition, it should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model. In the utility model, the orientation words such as 'up' and 'down' are generally used for the up and down of the device in the actual use or working state, and the specific is the drawing direction in the drawings; and 'inner' and 'outer' are used for the contour of the device.

[0040] Specifically, please combine Figures 1 to 9As shown in the figure, a battery shell assembly includes a battery shell body 1 and a support frame body 2, wherein the battery shell body 1 is provided with a shell inner cavity 11 and an inner cavity opening communicating with the shell inner cavity 11, and the battery shell body 1 is further provided with a positioning portion arranged in the shell inner cavity 11, the positioning portion is arranged from the inner cavity opening to the depth direction G along the shell inner cavity 11. The support frame body 2 is provided with a matching portion, and the positioning portion and the matching portion are inserted and matched, so that the support frame body 2 can slide along the positioning portion.

[0041] In the embodiment, as shown in the figures, Figure 1 , Figure 2 and Figure 4 , the above-mentioned positioning portion is configured as a guide rib 12, that is, the guide rib 12 is arranged from the side of the inner cavity opening to the side away from the inner cavity opening. Correspondingly, the matching portion is configured as a positioning groove 21, and the shape and size of the positioning groove 21 in the cross-sectional direction are preferably matched with the shape and size of the guide rib 12. For example, the battery shell body 1 includes a battery shell top wall 13 and a battery shell side wall 14 extending along the circumference of the battery shell top wall 13, one end of the battery shell side wall 14 away from the battery shell top wall 13 surrounds the above-mentioned inner cavity opening, and the inner cavity opening is arranged opposite to the battery shell top wall 13. The above-mentioned guide rib 12 is arranged on the battery shell side wall 14 and extends from the side close to the inner cavity opening to the battery shell top wall 13, and the end of the guide rib 12 is preferably connected to the battery shell top wall 13. Preferably, the battery shell top wall 13, the battery shell side wall 14 and the guide rib 12 are integrally formed, so that under the action of the guide rib 12, the structural strength of the battery shell body 1 can be effectively improved.

[0042] In this way, during the process of assembling the support frame body 2 from the inner cavity opening to the shell inner cavity 11 of the battery shell body 1, under the guidance of the matching between the positioning groove 21 and the guide rib 12, the support frame body 2 can smoothly slide along the depth direction G, that is, the support frame body 2 can slide along the guide rib 12, and the support frame body 2 can abut and contact the battery shell top wall 13 of the battery shell body 1 under the guidance of the guide rib 12. At the same time, the assembly precision between the support frame body 2 and the battery shell body 1 is improved.

[0043] In addition to the above-mentioned positioning portion configured as a guide rib 12 and the matching portion configured as a positioning groove 21, in other embodiments, the battery shell body 1 can be further provided with a positioning groove 21 arranged in the shell inner cavity 11, and the positioning groove 21 is the positioning portion. Correspondingly, the support frame body 2 is provided with a guide rib 12, and the guide rib 12 is the matching portion.

[0044] Preferably, as shown in the figures, Figure 1As shown, the number of the guiding ribs 12 is preferably two, the two guiding ribs 12 are oppositely arranged, the positioning grooves 21 on the support frame body 2 are correspondingly arranged as two, and each end of the support frame body 2 is provided with one positioning groove 21. Each guiding rib 12 is inserted into the corresponding positioning groove 21, and each positioning groove 21 is preferably arranged at the middle position in the width direction of the support frame body 2, which not only effectively improves the assembly precision, but also realizes the stress stability during the sliding assembly of the support frame body 2 into the inner cavity 11 of the shell.

[0045] It should be noted that the number of the guiding ribs 12 is not limited to two, but can also be three, four, five, and the like. The number of the positioning grooves 21 is the same as that of the guiding ribs 12, that is, the positioning grooves 21 on the support frame body 2 are correspondingly arranged as three, four, five, and the like, and the positions of the guiding ribs 12 and the positioning grooves 21 are correspondingly arranged. The number and position distribution of the guiding ribs 12 can be set and adjusted according to the structural design and design requirements of those skilled in the art.

[0046] It should also be noted that the specific Figure 2 and Figure 15 As shown, the size of the guiding rib 12 is defined as the thickness size T of the guiding rib 12, and the thickness size T of the guiding rib 12 is 0 < T < 0.2 mm. When the thickness size T is greater than 0.2 mm, the contact area between the guiding rib 12 and the positioning groove 21 increases, which leads to an increase in friction, and is not conducive to the smoothness during the assembly of the support frame body 2 and the battery shell body 1. When the thickness size T is between 0 < T < 0.2 mm, it is not only conducive to improving the assembly precision between the support frame body 2 and the battery shell body 1, but also can avoid excessive contact friction between the guiding rib 12 and the positioning groove 21.

[0047] Further, in combination with Figure 3 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown, the battery shell body 1 is provided with an electrode through port 15 for installing an electrode terminal 5. The electrode terminal 5 includes a positive electrode terminal 51 and a negative electrode terminal 52. The electrode through port 15 includes a positive electrode through port 151 and a negative electrode through port 152, both of which are arranged on the battery shell top wall 13 of the battery shell body 1. The positive electrode terminal 51 is fixedly installed in the positive electrode through port 151, and the negative electrode terminal 52 is fixedly installed in the negative electrode through port 152.

[0048] As a preferred mode of the present embodiment, in combination with Figure 4 and Figure 5As shown, the battery shell body 1 also includes an auxiliary positioning wall surrounding the electrode opening 15. The auxiliary positioning wall can abut the peripheral side of the electrode terminal 5 to constrain the electrode terminal 5 in the electrode opening 15. The electrode terminal 5 can be limited more efficiently and conveniently during the assembly and fixation process, and the positioning accuracy and assembly accuracy between the electrode terminal 5 and the electrode opening 15 are higher, which is beneficial to improving the energy density of the single battery, thereby improving the cruising range of vehicles and other means of transportation.

[0049] As a preferred embodiment of the present invention, along the extension direction of the electrode opening 15, the auxiliary positioning wall includes a peripheral side wall 16 and an end side wall 17. The peripheral side wall 16 is the side wall of the electrode opening 15 extending in the axial direction. The end side wall 17 protrudes out of the peripheral side wall 16 toward the inner side of the electrode opening 15, and the end side wall 17 extends circumferentially along the electrode opening 15. The end side wall 17 is arranged on the side of the electrode opening 15 close to the shell cavity 11, wherein the peripheral side wall 16 is used to abut the peripheral side surface of the electrode terminal 5, and the end side wall 17 is used to receive the end face of the electrode terminal 5.

[0050] In this way, when the electrode terminal 5 is assembled to the electrode opening 15, the electrode terminal 5 fits against the opening peripheral sidewall 16 and moves toward the opening end sidewall 17 under the guidance of the opening peripheral sidewall 16. The electrode terminal 5 only needs to be assembled by making the end surface of the electrode terminal 5 close to the opening end sidewall 17 abut against the opening end sidewall 17, thereby improving the assembly efficiency and convenience of the electrode terminal 5. At the same time, the electrode terminal 5 is subjected to force from the opening end sidewall 17, which improves the stability of the electrode terminal 5 installation.

[0051] Preferably, if Figure 5 As shown, the edge of the electrode opening 15 is bent and convex outward, so that the side of the pressure-bearing structure close to the shell cavity 11 can be flush with the inner surface of the shell cavity 11. When the support frame 2 abuts and fits the inner surface of the shell cavity 11, the support frame 2 will also abut and contact the pressure-bearing structure at the same time, thereby increasing the contact area between the support frame 2 and the battery shell top wall 13 of the battery shell body 1. At the same time, it can also make the assembly between the support frame 2 and the battery shell body 1 more compact.

[0052] It should be noted that the specific Figure 11 As shown, the battery case assembly also includes a case end cap 3 for sealing the case inner cavity 11. The case end cap 3 is fixedly connected to the battery case body 1, so that the case inner cavity 11 forms a relatively sealed space. The case end cap 3 is provided with a liquid injection hole 31 to facilitate the injection of electrolyte into the case inner cavity 11 through the liquid injection hole 31. The liquid injection hole 31 is equipped with a liquid injection sealing plug 4. In this way, the liquid injection sealing plug 4 can seal the liquid injection hole 31 to prevent the electrolyte from leaking out of the liquid injection hole 31.

[0053] Based on the structure and connection relationship of the battery shell assembly, the inventor also discloses a single battery, which will be described in detail below Figures 6 to 14 As shown in the figure, the single battery comprises the electrode assembly 6 and the battery shell assembly described above. The electrode assembly 6 is arranged in the battery shell body 1 of the battery shell assembly, and the support frame body 2 of the battery shell assembly is located between the electrode assembly 6 and the battery shell top wall 13 of the battery shell body 1, that is, the support frame body 2 of the battery shell assembly is clamped between the electrode assembly 6 and the battery shell top wall 13 of the battery shell body 1, so as to ensure the compactness of the single battery installation.

[0054] Further, as shown in the figure Figures 10 to 13 The electrode terminal 5 is fixed on the battery shell body 1. The positive electrode terminal 51 of the electrode terminal 5 is fixed on the positive electrode through hole 151 on the battery shell body 1, and the negative electrode terminal 52 of the electrode terminal 5 is fixed on the negative electrode through hole 152 on the battery shell body 1. The support frame body 2 is provided with a tab accommodating area 22, and two opposite stop knobs are arranged in the tab accommodating area 22. A gap is arranged between the two stop knobs. The stop knobs are preferably integrally formed with the battery shell body 1, so as to ensure good comprehensive performance.

[0055] As shown in the figure Figure 13 The electrode assembly 6 is provided with a tab connecting piece 7, which penetrates the gap and is electrically connected to the electrode terminal 5. The stop knobs are used to press the tab connecting piece 7. In this way, the tab connecting piece 7 on the electrode assembly 6 can directly electrically connect the electrode terminal 5 through the tab accommodating area 22 of the support frame body 2, reducing the number of existing parts and the welding process, thereby effectively reducing the number of metal particles and improving the convenience and efficiency of assembly. At the same time, the space occupied by other parts is reduced, thereby improving the utilization rate of the overall volume of the single battery.

[0056] As a further preferred mode of the present embodiment, as shown in the figures Figure 11 and Figure 13As shown, in the direction perpendicular to the large face of the support frame body 2, the two sides of the stopper tab body are respectively provided with an upper accommodating cavity 221 and a lower accommodating cavity 222, the upper accommodating cavity 221 is communicated with the lower accommodating cavity 222 through a gap, and the large face of the support frame body 2 is the largest side face in the support frame body 2. The above-mentioned tab connector 7 includes a terminal connecting part 71, a core pack connecting part 72, and a tab connecting part 73, wherein the terminal connecting part 71 extends from the side close to the gap to the side wall of the upper accommodating cavity 221, and the terminal connecting part 71 is preferably formed by bending and laminating to ensure that the terminal connecting part 71 can be connected to the electrode terminal 5, and in other embodiments, the terminal connecting part 71 can also be a single layer and extend to the side wall of the upper accommodating cavity 221. The core pack connecting part 72 extends from the side close to the gap to the side wall of the lower accommodating cavity 222, and the extension is preferably that the core pack connecting part 72 extends to the two opposite side walls of the lower accommodating cavity 222 to increase the connection area of the core pack connecting part 72 and the electrode assembly 6. The core pack connecting part 72 and the tab connecting part 73 are respectively fixed to the terminal connecting part 71 and the core pack connecting part 72, and the fixing is preferably integrated, that is, the terminal connecting part 71, the core pack connecting part 72, and the tab connecting part 73 are integrally formed.

[0057] Further, please refer to Figure 13 As shown, the terminal connecting part 71 is embedded in the upper accommodating cavity 221, and the terminal connecting part 71 is clamped between the stopper tab body and the electrode terminal 5, and the terminal connecting part 71 abuts against the terminal pressing block 54 of the electrode terminal 5. To ensure that the terminal connecting part 71 and the terminal pressing block 54 are connected firmly, the terminal connecting part 71 of the tab connector 7 and the terminal pressing block 54 of the electrode terminal 5 are laser welded. The tab connecting part 73 penetrates the gap, and the core pack connecting part 72 is embedded in the lower accommodating cavity 222, and the core pack connecting part 72 is clamped between the stopper tab body and the electrode assembly 6. In this way, the stopper tab body is located between the terminal connecting part 71 and the core pack connecting part 72, and the stopper tab body abuts against the tab connector 7, thereby achieving the purpose of clamping and fixing the tab connector 7 by the stopper tab body.

[0058] In the above, please refer to Figure 14As shown, the electrode terminal 5 comprises a plastic piece 53, a terminal pressing block 54, a sealing ring 55, a welding ring base 56 and an insulating patch 57. The terminal pressing block 54 is embedded in the welding ring base 56, and the sealing ring 55 is arranged between the welding ring base 56 and the terminal pressing block 54 to improve the sealing between the welding ring base 56 and the terminal pressing block 54. The plastic piece 53 is sleeved on the top of the welding ring base 56, so that the terminal pressing block 54 is firmly installed on the welding ring base 56, avoiding the risk of disengagement of the terminal pressing block 54 from the welding ring base 56 during use. The insulating patch 57 is arranged on the bottom of the welding ring base 56, and is used for the insulation between the welding ring base 56 and the battery shell body 1. The welding ring base 56 abuts against the auxiliary positioning wall 16 of the battery shell assembly and is fixed to the battery shell body 1 of the battery shell assembly, and the fixing is preferably laser welding.

[0059] Further, as shown in Figure 14 , the plastic piece 53 is provided with an external through opening 531, so that the terminal pressing block 54 can be partially exposed to facilitate electrical connection of the terminal pressing block 54 of the electrode terminal 5 with external elements. The welding ring base 56 is provided with a through opening 561, so that the tab connecting piece 7 can be electrically connected to the terminal pressing block 54 of the electrode terminal 5 through the through opening 561, and the power stored in the electrode assembly 6 can flow through the tab connecting piece 7 and the terminal pressing block 54 and be supplied to external elements.

[0060] In the assembly of the electrode terminal 5, the welding ring base 56 is first subjected to corrosion treatment to form irregular pits on the surface of the welding ring base 56, thereby increasing the bonding force between the welding ring base 56 and the plastic piece 53. Then, the part of the terminal pressing block 54 in contact with the plastic piece 53 is subjected to corrosion treatment. Next, the welding ring base 56, the sealing ring 55 and the terminal pressing block 54 are assembled together and placed in an injection mold for injection melting to form a combined piece. Finally, the insulating patch 57 is attached to the bottom of the welding ring base 56.

[0061] It should be noted that the electrode terminal 5 is not limited to the above-mentioned embodiment, and other electrode terminals 5 in the art can also be used as a conventional replacement for the electrode terminal 5 of the above-mentioned embodiment.

[0062] Further, as shown in Figure 1 , Figure 6 , Figure 7 , Figure 10 , Figure 11 and Figure 12 , the battery shell body 1 is provided with a pressure relief hole, the single battery further comprises an explosion-proof valve assembly 9 covering the pressure relief hole, and the support frame 2 comprises a pressure relief exhaust portion 23 opposite to the pressure relief hole. The pressure relief exhaust portion 23 is provided with a plurality of pressure relief exhaust holes 24, and preferably, the plurality of pressure relief exhaust holes 24 are uniformly distributed on the pressure relief exhaust portion 23.

[0063] Thus, when the monomer battery is in thermal runaway, the high-temperature gas will be able to pass through the pressure relief exhaust hole 24 of the pressure relief exhaust part 23 and act on the explosion-proof valve assembly 9, so that the pressure acting on the explosion-proof valve assembly 9 is increased to exceed the preset safety value of the explosion-proof valve assembly 9, and the explosion-proof valve is automatically opened to release the gas accumulated inside the shell inner cavity 11, thereby reducing the pressure of the shell inner cavity 11 and preventing the monomer battery from being broken or exploded.

[0064] It should be noted that, in order to ensure the insulation between the electrode assembly 6 and the battery shell body 1, the battery insulating part 8 is arranged between the electrode assembly 6 and the shell end cover 3 of the battery shell body 1.

[0065] In combination with the structure and connection relationship of the monomer battery, the assembly method of the monomer battery includes the following steps: S1: assembling the electrode assembly 6 with the support frame body 2, and the tab connecting part 7 passes through the tab accommodating area 22 of the support frame body 2; S2: placing the electrode assembly 6 assembled with the support frame body 2 into the shell inner cavity 11 of the battery shell body 1; S3: placing the battery insulating part 8 at the bottom of the electrode assembly 6; S4: welding the shell end cover 3 with the battery shell body 1 to seal the shell inner cavity 11 of the battery shell body 1; S5: embedding the electrode terminal 5 into the electrode through port 15 of the battery shell body 1, and welding the electrode terminal 5 with the tab connecting part 7; S6: injecting liquid through the liquid injection oil hole 31 of the shell end cover 3 towards the shell inner cavity 11, and sealing the liquid injection oil hole 31 by using the liquid injection sealing plug 4 after the shell inner cavity 11 is filled with electrolyte.

[0066] In addition, based on the structure and connection relationship of the monomer battery, the inventor also discloses a battery pack comprising the monomer battery.

[0067] The above has carried on the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been described by applying specific examples in this paper, and the above embodiment is only used to help understanding the method and core idea of the utility model; at the same time, for the person skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed, and the above is not understood as the limitation of the utility model.

Claims

1. A battery shell assembly, characterized in that: include: A battery shell body (1), the battery shell body (1) being provided with a shell inner cavity (11) and an inner cavity opening communicating with the shell inner cavity (11), the battery shell body (1) being further provided with a positioning portion disposed in the shell inner cavity (11), the positioning portion being extended from one side of the inner cavity opening toward a side away from the inner cavity opening; A support frame (2) is provided with a matching portion, the matching portion is plug-fitted with the positioning portion, and the support frame (2) can slide along the positioning portion.

2. The battery housing assembly according to claim 1, wherein: The positioning portion is configured as a guide rib (12), and the matching portion is configured as a positioning groove (21).

3. The battery housing assembly according to claim 2, wherein: The battery shell body comprises a battery shell top wall (13), and a battery shell side wall (14) extending circumferentially along the battery shell top wall (13); one end of the battery shell side wall (14) away from the battery shell top wall (13) is arranged to form the inner cavity opening, and the inner cavity opening is arranged opposite to the battery shell top wall (13); and the guide rib (12) extends from a side close to the inner cavity opening to the battery shell top wall (13).

4. The battery housing assembly according to claim 2 or 3, wherein: The number of the guide ribs (12) is two, and the two guide ribs (12) are arranged opposite to each other. A positioning groove (21) is provided at each end of the support frame (2), and each guide rib (12) is inserted into the corresponding positioning groove (21).

5. The battery housing assembly according to claim 2 or 3, characterized in that: The thickness dimension T of the guide rib (12) is 0<T<0.2mm.

6. The battery housing assembly according to claim 1, wherein: The battery shell body (1) is provided with an electrode opening (15), and the battery shell body (1) further comprises an auxiliary positioning wall surrounding the electrode opening (15), wherein the auxiliary positioning wall is used to abut against the electrode terminal (5) to constrain the electrode terminal (5) in the electrode opening (15).

7. The battery housing assembly according to claim 6, wherein: Along the extension direction of the electrode opening (15), the auxiliary positioning wall includes an opening circumferential side wall (16) and an opening end side wall (17), wherein the opening circumferential side wall (16) is a side wall of the electrode opening (15) extending in the circumferential direction, and the opening end side wall (17) protrudes from the opening circumferential side wall (16) toward the inner side of the electrode opening (15), and the opening circumferential side wall (16) is used to abut against the circumferential side surface of the electrode terminal (5), and the opening end side wall (17) is used to receive the end surface of the electrode terminal (5) on the side facing the opening circumferential side wall (16).

8. A single cell battery, characterized in that: include: The battery housing assembly according to any one of claims 1 to 7; An electrode assembly (6), wherein the electrode assembly (6) is arranged in a battery shell body (1) of the battery shell assembly, and a support frame (2) of the battery shell assembly is located between the electrode assembly (6) and a battery shell top wall (13) of the battery shell body (1).

9. The single cell according to claim 8, characterized in that: The single cell further comprises an electrode terminal, wherein the electrode terminal (5) comprises a plastic part (53), a terminal pressing block (54), a sealing ring (55) and a welding ring base (56); the terminal pressing block (54) is embedded in the welding ring base (56); the sealing ring (55) is arranged between the welding ring base (56) and the terminal pressing block (54); the plastic part (53) is sleeved on the welding ring base (56); the welding ring base (56) abuts against the auxiliary positioning wall of the battery shell assembly and is fixed to the battery shell body (1) of the battery shell assembly.

10. The single cell according to claim 8 or 9, characterized in that: The battery shell body (1) is provided with a pressure relief hole, the single battery further includes an explosion-proof valve assembly (9) covering the pressure relief hole, the support frame (2) includes a pressure relief exhaust portion (23) facing the pressure relief hole, and the pressure relief exhaust portion (23) is provided with a plurality of pressure relief exhaust holes (24).

11. A battery pack, characterized in that: Comprising the single battery as claimed in claim 8, 9 or 10.

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