Battery pack

Abstract

The utility model relates to a battery pack which comprises a shell and a battery pack accommodated in the shell, the battery pack comprises a battery cell module and a PCB, the battery cell module comprises at least one battery cell and at least one connecting piece, the at least one connecting piece is provided with a main body part and a pin part connected with the main body part, the main body part is configured to be connected with the battery cell in a conductive mode through direct mechanical contact, the pin part is configured to be connected with the PCB, and the PCB is provided with an electric connecting hole; the battery pack further comprises a connecting piece guiding piece, a through hole is formed in the connecting piece guiding piece, the through hole corresponds to the electric connecting hole, the connecting piece guiding piece is configured to guide the pin part to penetrate through the through hole to be inserted into the electric connecting hole, and the pin part and the electric connecting hole are connected with each other in a conductive mode through direct mechanical contact, so that electric connection between the connecting piece and the PCB is achieved. Therefore, the assembly is easy, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to a battery pack. Background Art

[0002] During the assembly process of the battery cell module and PCB board in the battery pack, the pins of the connecting piece in the battery cell module need to be connected to the electrical connection holes of the PCB board. Since the electrical connection holes of the PCB board are usually small, the assembly process usually requires manual assistance to align the connecting piece pins and the electrical connection holes. Utility Model Content

[0003] This application proposes a battery pack that can effectively solve the problem of improper assembly of battery cell modules and PCB boards.

[0004] A battery pack comprises a shell and a battery pack, wherein the battery pack is accommodated in the shell; wherein the battery pack comprises a battery cell module and a PCB board, the battery cell module comprises at least one battery cell and at least one connecting piece, at least one connecting piece is provided with a main body portion and a pin portion connected to the main body portion, the main body portion is configured to connect the battery cell in a conductive manner through direct mechanical contact, the pin portion is configured to connect to the PCB board, and the PCB board is provided with an electrical connection hole; the battery pack also comprises a connecting piece guide, the connecting piece guide is provided with a through hole, the through hole is arranged corresponding to the electrical connection hole, the connecting piece guide is configured to guide the pin portion to pass through the through hole and insert into the electrical connection hole, and the pin portion and the electrical connection hole are connected to each other in a conductive manner through direct mechanical contact to achieve electrical connection between the connecting piece and the PCB board.

[0005] By providing a connecting piece guide in the battery pack, the connecting piece pins can be assisted in being inserted into the electrical connection holes, so that the battery cell module and the PCB board can be quickly assembled into place, thereby improving assembly efficiency.

[0006] In one embodiment, the pin portion is connected to the electrical connection hole by welding.

[0007] In one embodiment, the through hole has a first end close to the electrical connection hole and a second end away from the electrical connection hole, and the aperture of the first end is smaller than the aperture of the second end.

[0008] In one embodiment, the first end and the electrical connection hole have the same aperture size.

[0009] In one embodiment, the hole wall enclosed in the connecting piece guide to form the through hole is an arc surface.

[0010] In one embodiment, the pin portion is configured to be inserted into the electrical connection hole along a direction perpendicular to the plane where the PCB board is located.

[0011] In one embodiment, the pin portion has a starting end close to the main body portion and an end away from the main body portion, and chamfers are provided on both sides of the end contacting the electrical connection hole.

[0012] In one embodiment, the battery pack further includes a packaging box, the PCB board is at least partially packaged in the packaging box, and the connecting piece guide is provided on the packaging box.

[0013] In one embodiment, the encapsulated area on the PCB is defined as a packaging area, and the electrical connection hole is located in an area outside the packaging area.

[0014] In one embodiment, the connecting piece guide is integrally formed with the packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a battery pack in the prior art.

[0016] Figure 2 Schematic diagram of a battery pack according to some embodiments of the present invention.

[0017] Figure 3 yes Figure 2 An exploded view of the battery pack is shown.

[0018] Figure 4 yes Figure 2 An exploded view of the battery pack is shown.

[0019] Figure 5 yes Figure 2 Schematic diagram of the connecting piece of the battery pack shown.

[0020] Figure 6 yes Figure 2 Schematic diagram of the connecting piece guide of the battery pack shown.

[0021] Figure 7 yes Figure 2 Schematic diagram of the battery pack packaging box and PCB board matching.

[0022] Figure 8 yes Figure 2 A front view of the battery pack showing the connection pins and electrical connection holes mating with each other.

[0023] Figure 9 yes Figure 2 A side view of the battery pack showing the connection pins and electrical connection holes mating. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0025] In the description of this application, unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances.

[0026] like Figure 1 Figure 1 shows a common battery pack 1a in the prior art. During the assembly process between the cell module 201a and the PCB board 240a, the pins 252a of the connecting piece 250a in the cell module 201a need to be connected to the electrical connection holes 241a in the PCB board 240a. Because the electrical connection holes 241a are typically small, manual alignment is required to insert the pins 252a of the connecting piece 250a into the electrical connection holes 241a, affecting production efficiency. Furthermore, during the assembly process, the pins 252a may be bent by the PCB board 240a, resulting in a short circuit between the pins 252a and components on the PCB board 240a.

[0027] Therefore, in order to solve the above problems, Figures 2 to 9 As shown, an embodiment of the present application provides a battery pack 1 , which includes a housing 100 and a battery pack 200 accommodated in the housing 100 .

[0028] In some embodiments, the housing 100 includes an upper housing 110 and a lower housing 120 connected to the upper housing 110 . The upper housing 110 and the lower housing 120 can be connected to each other by fasteners, which can be screws, pins or other parts well known to those skilled in the art.

[0029] The battery pack 200 includes a cell module 201, which includes at least one cell 210 and at least one connecting piece 250. The number of cells 210 and the series and parallel connection between the cells 210 can be adjusted according to the voltage of the cells 210 and different nominal voltages, and this application does not specifically limit this.

[0030] In some embodiments, the plurality of battery cells 210 are arranged along the left-right direction and the front-back direction. Figure 4As shown, the battery cell module 201 includes 30 battery cells 210, and the battery cells 210 are arranged in 4 rows in the front-to-back direction and 7 columns in the left-to-right direction. On this basis, a column is added on the leftmost side, and the column is configured with 2 battery cells 210 in the front-to-back direction. The battery cells 210 can be connected in series or in parallel through the connecting piece 250, or a battery cell group can be formed by combining series and parallel. In some embodiments, the battery cell 210 is in the shape of a cylinder, and the battery cell 210 includes a main body extending in the longitudinal direction, and the anode and cathode parts are arranged at both ends of the main body. Of course, the battery cell 210 can also be prismatic, which is not limited in this application.

[0031] In some embodiments, as Figure 4 As shown, the up-down direction of the housing 110 is perpendicular to the longitudinal extension direction of the battery cells 210 .

[0032] like Figure 5 As shown, the connecting piece 250 includes a main body 251 and a pin portion 252 connected to the main body 251 . The main body 251 is configured to connect to the battery cell 210 in a conductive manner through direct mechanical contact, and the pin portion 252 is configured to connect to the PCB board 240 .

[0033] In some embodiments, the main body 251 is welded to the battery cell 210. Figure 5 As shown, one main body 251 is provided with four welding parts 256, and one welding part 256 is connected to one battery cell 210. Optionally, the welding part 256 is provided with four welding points.

[0034] In some embodiments, as Figure 5 As shown, the pin portion 252 has a starting end 253 close to the main body 251 and a terminal end 254 away from the main body 251. Chamfers 255 are provided on both sides of the terminal end 254 where it contacts the electrical connection hole 241. The chamfers 255 can reduce friction when the pin portion 252 is inserted into the electrical connection hole 241, assisting in assembly and improving assembly efficiency.

[0035] In some embodiments, as Figure 4 As shown, the battery module 201 further includes a support frame 220, which includes a plurality of cavities for accommodating the battery cells 210, each cavity being used to secure a battery cell 210. Optionally, the support frame 220 includes an upper support frame 221 and a lower support frame 222 connected to the upper support frame 221, wherein the upper support frame 221 holds the upper ends of the plurality of battery cells 210, and the lower support frame 222 holds the lower ends of the plurality of battery cells 210.

[0036] The battery pack 200 further includes a PCB board 240 for controlling the charge and discharge of the battery cells 210 . The PCB board 240 is provided with electrical connection holes 241 for connecting to the pin portions 252 .

[0037] The battery pack 1 also includes a connecting piece guide 260, which defines a through-hole 264 corresponding to the electrical connection hole 241. The connecting piece guide 260 guides the pin portion 252 through the through-hole 264 and into the electrical connection hole 241. The pin portion 252 and the electrical connection hole 241 are electrically connected through direct mechanical contact, thereby achieving electrical connection between the connecting piece 250 and the PCB 240. Guided by the connecting piece guide 260, the pin portion 252 can be inserted into the electrical connection hole 241 quickly and accurately without the need for manual alignment, thereby improving assembly efficiency.

[0038] In some embodiments, the pin portion 252 is connected to the electrical connection hole 241 by welding, and the welding method can be tin soldering or laser welding, which is not limited in this application.

[0039] In some embodiments, as Figure 6 and Figure 7 As shown, the through hole 264 of the connecting piece guide 260 has a first end 261 close to the electrical connection hole 241 and a second end 262 away from the electrical connection hole 241, and the aperture of the first end 261 is smaller than the aperture of the second end 262. Optionally, the first end 261 and the second end 262 are circular, and of course the first end 261 and the second end 262 can also be irregularly shaped. It should be noted that when the first end 261 and the second end 262 are circular, "the aperture of the first end 261" refers to the diameter of the first end 261, "the aperture of the second end 262" refers to the diameter of the second end 262, and "the aperture of the first end 261 is smaller than the aperture of the second end 262" means that the diameter of the first end 261 is smaller than the diameter of the second end 262. When the first end 261 and the second end 262 are irregularly shaped, "the aperture of the first end 261" refers to the length and width of the first end 261, and "the aperture of the second end 262" refers to the length and width of the second end 262. As Figure 7 and Figure 8 As shown, first end 261 has a length L2 and a width L5, while second end 262 has a length L3 and a width L6. "The aperture of first end 261 is smaller than the aperture of second end 262" means that the length L2 of first end 261 is smaller than the length L3 of second end 262, and the width L5 of first end 261 is smaller than the width L6 of second end 262. This allows pin 252 to smoothly pass through second end 262 and first end 261 without requiring precise alignment of pin 252 and through-hole 264.

[0040] In some embodiments, the aperture of the first end 261 is equal to the aperture of the electrical connection hole 241. It should be noted that the "aperture of the electrical connection hole 241" refers to the length and width of the electrical connection hole 241. Figure 7 and Figure 8As shown, the electrical connection hole 241 has a length L1 and a width L4. "The diameter of the first end 261 is equal to the diameter of the electrical connection hole 241" means that the length L2 of the first end 261 is equal to the length L1 of the electrical connection hole 241, and the width L5 of the first end 261 is equal to the width L4 of the electrical connection hole 241. In this way, after the pin portion 252 passes through the first end 261, it can be inserted into the electrical connection hole 241 without any obstruction.

[0041] In some embodiments, the connecting piece guide 260 includes a hole wall 263 that encloses the through hole 264. The hole wall 263 is a convex or concave arc surface. This can reduce friction when the pin portion 252 passes through the through hole 264, further assisting assembly and improving assembly efficiency.

[0042] In some embodiments, the pin portion 252 is inserted into the electrical connection hole 241 in a direction perpendicular to the plane of the PCB board 240. In this way, the probability of the pin portion 252 being squeezed during the assembly process can be reduced, and the pin portion 252 can be inserted into the electrical connection hole 241 without obstruction.

[0043] When the battery cell module 201 is assembled with the PCB 240, the pin portion 252 of the connecting piece 250 first passes through the second end 262 of the through hole 264, then through the first end 261, and finally through the electrical connection hole 241 on the PCB 240. This eliminates the need for manual and precise alignment of the pin portion 252 with the electrical connection hole 241, allowing the pin portion 252 to be inserted quickly and accurately into the electrical connection hole 241, thereby improving assembly efficiency.

[0044] In some embodiments, as Figure 7 As shown, the battery pack 200 further includes a packaging box 230, in which the PCB board 240 is at least partially encapsulated, and the connecting piece guide 260 is disposed on the packaging box 230. This eliminates the need for introducing new components, and the existing packaging box 230 in the battery pack 1 can be used to fix the position of the connecting piece guide 260, thereby reducing design and production costs.

[0045] In some embodiments, the encapsulated area on the PCB board 240 is defined as the encapsulation area 243, and the electrical connection hole 241 is located outside the encapsulation area 243. In this way, the electrical connection hole 241 does not need to be encapsulated after the battery module 201 and the PCB board 240 are assembled, simplifying the process.

[0046] In some embodiments, the connecting piece guide 260 is integrally formed with the packaging box 230. In this way, there is no need to separately produce the connecting piece guide 260 and the packaging box 230 and complete the assembly, thereby reducing design and production costs.

[0047] In some embodiments, the packaging box 230 is provided with a first positioning member 231, and the PCB board 240 is provided with a second positioning member 242. The first positioning member 231 and the second positioning member 242 cooperate with each other to position the PCB board 240 on the packaging box 230. In this way, the first end 261 of the through hole 264 can be aligned with the electrical connection hole 241 by positioning the PCB board 240 on the packaging box 230, further assisting assembly and improving assembly efficiency.

[0048] In some embodiments, the first positioning member 231 is configured as a convex structure, such as a convex column, and the second positioning member 242 is configured as a groove structure or a hole structure. A plurality of first positioning members 231 and second positioning members 242 are provided. Of course, the first positioning member 231 and second positioning member 242 can also be configured in other forms that can achieve the basic functional effects.

[0049] In some embodiments, the support frame 220 and the packaging box 230 are connected by screws, pins, or other parts well known to those skilled in the art, so that the packaging box 230 is fixed on the battery module 201 .

[0050] like Figure 7 and Figure 8 As shown, when the battery cell module 201 is assembled with the packaging box 230, the pin portion 252 of the connecting piece 250 first passes through the second end 262 of the through hole 264, then passes through the first end 261, and finally passes through the electrical connection hole 241 on the PCB board 240. In this way, the pin portion 252 can be quickly and accurately inserted into the electrical connection hole 241 without the need for manual precise alignment of the pin portion 252 and the electrical connection hole 241, thereby improving assembly efficiency.

[0051] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A battery pack (1), comprising: a housing (100), a battery pack (200), the battery pack (200) being accommodated in the housing (100); in, The battery pack (200) comprises a battery cell module (201) and a PCB board (240), wherein the battery cell module (201) comprises at least one battery cell (210) and at least one connecting piece (250), wherein at least one connecting piece (250) is provided with a main body (251) and a pin portion (252) connected to the main body (251), wherein the main body (251) is configured to be connected to the battery cell (210) in an electrically conductive manner through direct mechanical contact, and the pin portion (252) is configured to be connected to the PCB board (240), and the PCB board (240) is provided with an electrical connection hole (241); The battery pack (200) is characterized in that the battery pack (200) further includes a connecting piece guide (260), the connecting piece guide (260) is provided with a through hole (264), the through hole (264) is arranged corresponding to the electrical connection hole (241), and the connecting piece guide (260) is configured to guide the pin portion (252) to pass through the through hole (264) and be inserted into the electrical connection hole (241), and the pin portion (252) and the electrical connection hole (241) are connected to each other in a conductive manner through direct mechanical contact, so as to realize the electrical connection between the connecting piece (250) and the PCB board (240).

2. The battery pack (1) according to claim 1, characterized in that The pin portion (252) is connected to the electrical connection hole (241) by welding.

3. The battery pack (1) according to claim 1, characterized in that The through hole (264) has a first end (261) close to the electrical connection hole (241) and a second end (262) away from the electrical connection hole (241), and the aperture of the first end (261) is smaller than the aperture of the second end (262).

4. The battery pack (1) according to claim 3, characterized in that The aperture of the first end (261) is the same as the aperture of the electrical connection hole (241).

5. The battery pack (1) according to any one of claims 1 to 4, characterized in that: The hole wall (263) enclosed within the connecting piece guide (260) to form the through hole (264) is an arc surface.

6. The battery pack (1) according to claim 1, characterized in that The pin portion (252) is configured to be inserted into the electrical connection hole (241) in a direction perpendicular to the plane where the PCB board (240) is located.

7. The battery pack (1) according to claim 6, characterized in that: The pin portion (252) has a starting end (253) close to the main body portion (251) and an end (254) away from the main body portion (251), and chamfers (255) are provided on both sides of the end (254) contacting the electrical connection hole (241).

8. The battery pack (1) according to claim 1, characterized in that: The battery pack (200) further comprises a packaging box (230), the PCB board (240) is at least partially packaged in the packaging box (230), and the connecting piece guide (260) is arranged on the packaging box (230).

9. The battery pack (1) according to claim 8, characterized in that: The encapsulated area on the PCB board (240) is defined as an encapsulation area (243), and the electrical connection hole (241) is located in an area outside the encapsulation area (243).

10. The battery pack (1) according to claim 8, characterized in that: The connecting piece guide (260) is integrally formed with the packaging box (230).

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