Battery pack and refrigerator

Abstract

The application discloses a battery pack and a refrigerator, wherein the battery pack comprises a plurality of single batteries, each of the single batteries has a positive electrode lug and a negative electrode lug, all the single batteries are arranged in a laminated mode, and all the single batteries are connected in series through the positive electrode lugs and the negative electrode lugs; the positive electrode lugs and the negative electrode lugs of two adjacent single batteries are arranged in an interlaced mode, the positive electrode lug of the single battery corresponds to the negative electrode lug of the adjacent single battery in position; the positive electrode lugs and the negative electrode lugs which correspond in position and need to be electrically connected are connected through a conductive connecting piece, the conductive connecting piece has a receiving plate, and the positive electrode lugs and the negative electrode lugs are both laid flat and welded on the receiving plate. The battery pack and the refrigerator effectively solve the problems that the battery pack in the prior art is large in size, low in space utilization, and cannot meet the use requirements of the refrigerator.

Description

Technical Field

[0001] This invention relates to the field of refrigerator battery technology, and more specifically, to a battery pack and a refrigerator. Background Technology

[0002] As home decoration demands increasingly higher aesthetic standards, refrigerators often need to be embedded in cabinets or dedicated decorative cabinets, which limits the overall heat dissipation of the refrigerator. Moreover, many refrigerators are often pushed against the wall and pressed against the wall, which is particularly detrimental to the heat dissipation of refrigerators with energy storage batteries. Refrigerators with energy storage batteries can meet the needs of off-peak electricity use and ensure the preservation of food during power outages, and have good market prospects. In order to use energy storage in the case of embedded refrigerators, heat dissipation needs to be considered. In addition to the heat dissipation of the refrigerator itself, the heat dissipation of the energy storage battery also needs to be designed independently.

[0003] The current market's wiring and encapsulation methods for soft battery tabs result in larger battery pack sizes, which can affect the overall height of the refrigerator, especially when placed on top, or require sacrificing the refrigerator's height and volume, leading to a decrease in cost-effectiveness.

[0004] In existing technology, the battery packs used in refrigerators are generally pouch-type lithium iron phosphate cells. Their positive and negative electrodes (called tabs) are soft and about 0.2mm thick. The positive tab is made of aluminum, and the negative tab is made of nickel. Aluminum cannot be directly soldered to wires because it is not strong enough, so it needs to be soldered to the overall circuit by nickel sheets.

[0005] like Figures 1 to 3 As shown, this is a mature existing battery welding and packaging method. The tabs 102 of battery 101 are folded back and forth by 90°, and then the individual batteries 101 are welded together using the welding strips of a dedicated welding plate 103 (the welding strips are relatively thick, allowing the tabs to be firmly welded to the strips via laser welding, resulting in a strong connection). This forms a series connection of positive and negative electrodes. The positive electrode of the first battery and the negative electrode of the last battery are then welded out via nickel sheets 104 for easy wiring. However, this welding and packaging method, due to the folding of each battery, inevitably results in an excessively thick battery pack L1, with gaps L2 between the batteries, where L2 is even larger than the thickness of a single battery. This results in a large battery pack size, leading to wasted space and making it impossible to meet the height requirements of a refrigerator. For built-in refrigerators, increasing the height would not meet performance needs.

[0006] In summary, existing battery packs are large in size and have low space utilization, which cannot meet the usage requirements of refrigerators. Summary of the Invention

[0007] This invention provides a battery pack and a refrigerator to solve the problem that existing battery packs are too large, have low space utilization, and cannot meet the usage requirements of refrigerators.

[0008] To achieve the above objectives, the present invention provides a battery pack comprising multiple individual cells, each individual cell having a positive tab and a negative tab, all individual cells being stacked together in close proximity, and all individual cells being connected in series via the positive and negative tabs; the positive and negative tabs of adjacent individual cells are staggered, with the positive tab of one individual cell corresponding to the negative tab of the adjacent individual cell; the corresponding positive and negative tabs that require electrical connection are connected by a conductive connector, the conductive connector having a receiving plate, and both the positive and negative tabs being laid flat and welded to the receiving plate.

[0009] Furthermore, the receiving plate includes a first welding plate and a second welding plate arranged at intervals, the positional relationship between the first welding plate and the second welding plate corresponding to the positional relationship between the positive and negative electrodes; the positive and negative electrodes are respectively welded to the first welding plate and the second welding plate.

[0010] Furthermore, heat dissipation fins are formed on the conductive connector, and the opening direction of the heat dissipation fins faces away from the single battery.

[0011] Furthermore, the conductive connector is made entirely of aluminum, and the positive electrode and the negative electrode are welded to the receiving plate by laser welding.

[0012] Furthermore, the battery pack includes two single cells, and the two single cells have two sets of positive and negative tabs corresponding to each other. One set of positive and negative tabs is connected by a conductive connector, and the other set of positive and negative tabs is connected to an external circuit.

[0013] Furthermore, the battery pack includes three individual cells, each having two sets of positive and negative tabs that are correspondingly positioned and electrically connected. The three individual cells are connected in series through two conductive connectors, and each has one positive tab and one negative tab that are connected to an external circuit.

[0014] Furthermore, both the positive and negative tabs of the single battery are provided with clearance openings, and the two clearance openings on the positive and negative tabs that are corresponding in position and require electrical connection are staggered; the positive and negative tabs are welded to the corresponding first and second welding plates by laser welding process; the first welding plate is welded to the positive or negative tabs on the two outer single batteries, and the first welding plate has clearance holes corresponding to the positions of the clearance openings; the second welding plate is welded to the positive or negative tab of the middle single battery; the clearance openings on the two outer single batteries of the three single batteries at least partially overlap with the clearance holes to form a clearance path for avoiding the laser.

[0015] According to another aspect of the invention, a refrigerator is provided, comprising the aforementioned battery pack, the battery pack being arranged on the top of the refrigerator.

[0016] Furthermore, the refrigerator has an installation chamber at the top, in which the battery pack is installed; the installation chamber is connected to the refrigerator's cold compartment via a bypass pipe, and the cold air from the cold compartment can enter the installation chamber through the bypass pipe to cool the battery pack.

[0017] Furthermore, it also includes: a windbreak component, movably installed in the bypass pipe; a drive component, drivenly connected to the windbreak component; the windbreak component having a first position of closing the bypass pipe and a second position of opening the bypass pipe.

[0018] Furthermore, it also includes: a cooling fan disposed in the mounting chamber to form airflow; a heat dissipation hole, the mounting chamber being connected to the outside air of the refrigerator through the heat dissipation hole, and a heat dissipation channel being formed between the cooling fan and the heat dissipation hole; the inlet of the bypass pipe being connected to the refrigerator compartment, and the outlet of the bypass pipe being located within the heat dissipation channel.

[0019] First, in this invention, the positive and negative tabs of the individual cells are laid flat and supported by a receiving plate. Therefore, the positive and negative tabs of the individual cells can be welded without bending, reducing the gaps between cells and significantly decreasing the thickness of the battery pack. Second, because the conductive connector solves the connection problem of the individual cell tabs, all individual cells can be stacked close together, eliminating gaps between cells and minimizing the thickness of the battery pack. Third, in this invention, the positive and negative tabs that need to be electrically connected are connected by conductive connectors. Utilizing the staggered arrangement of the individual cells, the positive and negative tabs that need to be electrically connected are on the same side and corresponding in position. This allows the conductive connectors to be directly welded, resulting in a stable and compact structure that does not occupy excessive space, greatly reducing the size of the battery pack. This meets the requirements of refrigerators, facilitating refrigerator miniaturization and improving refrigerator performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a single battery in the prior art;

[0021] Figure 2 This is an exploded view of the battery pack structure in the prior art;

[0022] Figure 3 This is a schematic diagram of the external structure of a battery pack in the prior art;

[0023] Figure 4This is a schematic diagram of the battery pack structure according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the stacked single cells of the battery pack according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of a single cell in the battery pack according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure and assembly of the battery pack according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the battery pack in an embodiment of the present invention when forming a battery pack string;

[0028] Figure 9 This is a schematic diagram of the internal structure of a refrigerator according to an embodiment of the present invention;

[0029] Figure 10 This is a front view of a refrigerator according to an embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of the refrigerator's bypass pipe when it is closed, according to an embodiment of the present invention.

[0031] Figure 12 This is a schematic diagram of the structure of the refrigerator with the bypass pipe open according to an embodiment of the present invention. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0033] See Figures 4 to 7 As shown, according to an embodiment of the present invention, a battery pack is provided, the battery pack including a plurality of single cells 10, each single cell 10 having a positive electrode tab 11 and a negative electrode tab 12, all single cells 10 being stacked together in close contact, and all single cells 10 being connected in series through the positive electrode tab 11 and the negative electrode tab 12.

[0034] The positive tabs 11 and negative tabs 12 of two adjacent single batteries 10 are staggered, with the positive tabs 11 of the single battery 10 corresponding to the negative tabs 12 of the adjacent single battery 10. The positive tabs 11 and negative tabs 12 that correspond in position and need to be electrically connected are connected by a conductive connector 20. The conductive connector 20 has a receiving plate, and the positive tabs 11 and negative tabs 12 are both laid flat and welded to the receiving plate.

[0035] First, in this invention, the positive and negative tabs of the individual cells are laid flat and supported by a receiving plate. Therefore, the positive and negative tabs of the individual cells can be welded without bending, reducing the gaps between cells and significantly decreasing the thickness of the battery pack. Second, because the conductive connector solves the connection problem of the individual cell tabs, all individual cells can be stacked close together, eliminating gaps between cells and minimizing the thickness of the battery pack. Third, in this invention, the positive and negative tabs that need to be electrically connected are connected by conductive connectors. Utilizing the staggered arrangement of the individual cells, the positive and negative tabs that need to be electrically connected are on the same side and corresponding in position. This allows the conductive connectors to be directly welded, resulting in a stable and compact structure that does not occupy excessive space, greatly reducing the size of the battery pack. This meets the requirements of refrigerators, facilitating refrigerator miniaturization and improving refrigerator performance.

[0036] It needs to be explained that, see [link / reference] Figure 4 , Figure 5 and Figure 7 In the figure, the single batteries are stacked from top to bottom, and the two adjacent single batteries are placed in opposite directions, so that the positive electrode tab 11 of the single battery and the negative electrode tab 12 of the adjacent single battery 10 are on the same side. Figure 4 The electrodes on the left side, from top to bottom, are the positive electrode, the negative electrode, and the positive electrode. Figure 4 The tabs on the right side, from top to bottom, are the negative tab, positive tab, and negative tab again. To ensure the individual cells are connected in series, [the following is a continuation of the previous sentence]... Figure 4 The two electrodes on the upper left are connected by a conductive connector. Figure 4 The two tabs on the lower right are connected by a conductive connector, keeping the battery pack connected to an external circuit with one positive tab and one negative tab, or forming a battery string with other battery packs of the same structure.

[0037] Preferably, the receiving plate includes a first welding plate 21 and a second welding plate 22 arranged at intervals, and the positional relationship between the first welding plate 21 and the second welding plate 22 corresponds to the positional relationship between the positive electrode tab 11 and the negative electrode tab 12.

[0038] The positive electrode tab 11 and the negative electrode tab 12, corresponding to the positions, are respectively welded to the first welding plate 21 and the second welding plate 22.

[0039] Because the positive and negative tabs are relatively soft and fragile, a first welding plate and a second welding plate are set for each positive and negative tab on the receiving plate. This makes the welding process more stable, prevents damage to the tabs, and avoids short circuits.

[0040] See Figure 4 and Figure 7 The positive tab 11 and negative tab 12 are spaced apart along the thickness direction of the battery pack. Similarly, the first welding plate and the second welding plate are also spaced apart along the thickness direction of the battery pack, with the same spacing. This ensures that when the first welding plate is welded to the positive tab, the second welding plate is in contact with and can be welded to the negative tab. This structural matching eliminates stress concentration issues in the structural connections. During battery pack installation, welding is required on both sides. When flipping the plate for welding, the first and second welding plates can be selected to weld to either the positive or negative tab, depending on the specific location.

[0041] The conductive connector 20 has heat dissipation fins 23 formed on it, with the openings of the heat dissipation fins 23 facing away from the single battery 10. Since the battery undergoes a charging and discharging process, the welded joints are more prone to heat generation (e.g., when the charging and discharging rate is high, the current is large). The conductive connector can act as a heat dissipation component. By setting heat dissipation fins 23 on the conductive connector 20, heat is dissipated from the battery. The conductive connector 20 not only serves to connect the tabs and complete the series connection, but also has a heat dissipation function, achieving a multi-purpose effect.

[0042] In this embodiment, the conductive connector 20 is entirely made of aluminum, and the positive electrode 11 and the negative electrode 12 are welded to the receiving plate using a laser welding process. Since the positive electrode 11 is typically made of aluminum and the negative electrode is made of nickel, only laser welding can meet the welding requirements. Furthermore, the use of aluminum for the conductive connector not only provides electrical conductivity and superior heat dissipation, but also allows for laser welding, achieving a multi-functional design.

[0043] In a further preferred embodiment, the battery pack includes three individual cells 10, each having two sets of corresponding positive tabs 11 and negative tabs 12 that need to be electrically connected. The three individual cells 10 are connected in series via two conductive connectors 20, and each has one positive tab 11 and one negative tab 12 connected to an external circuit. Considering the power requirements of the refrigerator's energy storage battery, three individual cells can meet the needs, and the total thickness of the three cells stacked together will not exceed the requirements, meaning the total thickness of the battery pack can meet the requirements of the refrigerator.

[0044] Considering the special nature of laser welding process and the characteristics of electrode tabs, this embodiment is further preferred in that the positive electrode tab 11 and negative electrode tab 12 of the single battery 10 are both provided with clearance openings 13, and the two clearance openings 13 on the positive electrode tab 11 and negative electrode tab 12 that are corresponding in position and need to be electrically connected are staggered.

[0045] The positive electrode tab 11 and the negative electrode tab 12 are welded to the corresponding first welding plate 21 and second welding plate 22 by laser welding process; the first welding plate 21 is welded to the positive electrode tab 11 or negative electrode tab 12 on the two outer single cells 10, and the first welding plate 21 has a clearance hole 21a corresponding to the position of the clearance opening 13; the second welding plate 22 is welded to the positive electrode tab 11 or negative electrode tab 12 of the middle single cell 10.

[0046] The clearance openings 13 on the two outermost single cells 10 of the three single cells 10 at least partially overlap with the clearance hole 21a to form a clearance path to avoid the laser.

[0047] Combination Figure 4 and Figure 7 As shown, the above structure and laser welding process are explained. First, all single cells have clearance openings 13 on their positive and negative tabs. The middle single cell is reversed so that its positive and negative tabs are staggered with the corresponding tabs. The clearance openings on the reversed single cell are also reversed, so that the clearance openings of the two outer single cells are located on the right side of the tabs, and the clearance openings of the middle single cell are located on the left side of the tabs, forming a staggered arrangement. In the figure, two of the three single cells are located on the outer layer, with clearance openings 21a. The first welding plate 21 is only welded to the tabs of the outer single cells. When welding the first welding plate 21 to the tabs, the clearance opening 13 at least partially overlaps with the clearance opening 21a to form a clearance path for the laser. Welding points c are formed on the clearance path at the second welding plate and the tab of the middle single cell. Figure 7 As shown, welding point c is the welding point formed between the electrode tab and the second welding plate by the laser passing through the avoidance path. The second welding plate 22 does not have any avoidance structure. After passing through the avoidance path, the laser will inevitably hit the electrode tab and the second welding plate to form a welding point. Therefore, the second welding plate is welded to the positive electrode tab 11 or negative electrode tab 12 of the middle single cell 10. During welding, the placement direction of the guide connector can be adjusted according to the specific position so that the position of the second welding plate can be welded to the electrode tab of the middle single cell.

[0048] The welding machine uses laser marking to directly generate heat to weld the tabs and conductive connectors together. When the laser encounters an obstacle, it heats the obstacle first. If no hole is made, the outer battery tabs can be welded, but the others cannot. Therefore, clearance holes 21a are provided on the first welding plate, and clearance openings 13 are provided on the tabs. The clearance path serves to allow for proper alignment. Furthermore, the clearance opening 13 is a circular hole structure on the tab. This design ensures the formation of a universal part, preventing the production of multiple specifications and improving production efficiency.

[0049] The specific welding and packaging process is as follows:

[0050] The conductive connector (heat dissipation aluminum base) is inserted between the tabs of the stacked single cells. The first welding plate 21 and the second welding plate 22 respectively support the tabs to be welded. Then, the individual battery packs are arranged side by side in 5 columns to form a battery string (e.g., Figure 8 During soldering and encapsulation, such as Figure 4 As shown, the entire battery pack is first placed face up. Using a laser welding machine positioning fixture, the tabs of the outermost individual cells are directly welded to the first welding plate. Since the tabs are attached to the first welding plate, which is relatively thick (e.g., >2mm) and hard, laser welding firmly bonds the tabs to the first welding plate. Then, the entire battery pack is flipped over, and the tabs of the other outermost individual cells are welded on the reverse side. Similarly, taking advantage of the hardness of the first welding plate's contact surface, laser welding results in a strong bond.

[0051] The welding point c of the laser welding joint needs to be lasered onto the tab of the middle single cell through an avoidance path, and then welded together with the second welding plate.

[0052] Finally, only one positive and one negative terminal of the battery pack are exposed to facilitate wiring to the controller.

[0053] In another embodiment not shown in the figure, the battery pack contains two individual cells. Specifically, the battery pack includes two individual cells 10, and the two individual cells 10 have two sets of positive tabs 11 and negative tabs 12 with corresponding positions. One set of positive tabs 11 and negative tabs 12 is connected by a conductive connector 20, and the other set of positive tabs 11 and negative tabs 12 is connected to an external circuit.

[0054] Since the two single cells can be welded simply by flipping them over, the battery pack with two single cells does not need to consider the setting of obstacle avoidance paths, making the structure simpler and able to meet the needs of general use. The battery pack with two single cells is also thinner.

[0055] See Figures 9 to 12 An embodiment of a refrigerator is provided, the refrigerator including the battery pack of the above embodiment, the battery pack being arranged on the top of the refrigerator.

[0056] The refrigerator of the present invention can be used as an embedded refrigerator. The battery pack is installed on the top of the refrigerator, which does not take up too much space in the refrigerator, effectively reducing the height of the refrigerator and improving its performance.

[0057] Preferably, the top of the refrigerator has a mounting chamber 31, and the battery pack is installed in the mounting chamber 31;

[0058] The installation chamber 31 is connected to the refrigerator compartment 32 via a bypass pipe 33. The cold air from the refrigerator compartment 32 can enter the installation chamber 31 through the bypass pipe 33 to cool the battery pack.

[0059] When a strong cooling effect is needed on the battery pack, cold air from the refrigerator compartment can be introduced to cool it down, making full use of the refrigerator's cold air and improving the battery's heat dissipation and cooling capacity.

[0060] To further enhance intelligence and save energy, the refrigerator also includes a wind deflector 41 and a drive component 42. The wind deflector 41 is movably installed in the bypass pipe 33; the drive component 42 is drivenly connected to the wind deflector 41; the wind deflector 41 has a first position with the bypass pipe 33 closed and a second position with the bypass pipe 33 open.

[0061] When the battery does not require heat dissipation or its temperature is low, the wind deflector 41 closes the bypass pipe 33 to preserve the cold air in the refrigerator compartment and achieve energy saving. When the battery temperature is high and needs to be cooled, the wind deflector 41 opens the bypass pipe 33 to introduce cold air for rapid cooling, ensuring that the battery is not affected and extending its lifespan.

[0062] The refrigerator also includes a cooling fan 51 and cooling vents 52. The cooling fan 51 is disposed within the mounting chamber 31 to create airflow. The mounting chamber 31 communicates with the outside air through the cooling vents 52, and a heat dissipation channel is formed between the cooling fan 51 and the cooling vents 52. The inlet of the bypass pipe 33 communicates with the refrigerator compartment 32, and the outlet of the bypass pipe 33 is located within the heat dissipation channel. The cooling vents 52 are located on the front of the refrigerator, which allows for the dissipation of heat, preventing it from accumulating at the back or rear, as is typical for built-in refrigerators.

[0063] In this embodiment, the wind deflector adopts a conical structure and is made of foam insulation material. When closed, the wind deflector fits snugly against the refrigerator's insulation layer, preventing cold leakage. This differs from automatic door opening and closing ventilation. Automatic door opening and closing or drawer retraction results in significant cold loss and large temperature fluctuations, and the experience can be unpleasant, such as startling the user. The conical structure of the wind deflector controls cold loss and temperature fluctuations, and its concealed design within the top electrical box makes it difficult for the user to notice. Furthermore, if the refrigerator door has been closed for an extended period (>1 day), or if the refrigerator's camera detects odorous food such as durian, the wind deflector can be activated directly without considering ambient temperature. When the wind deflector opens the bypass pipe 33, the sterilization device inside the refrigerator simultaneously activates to remove odors. The drive component 42, with its rack and pinion mechanism, raises and lowers the wind deflector.

[0064] When the ambient temperature is <T (such as 30 °C), it is only necessary to rely on the cooling fan 51 placed on the top for heat dissipation, and the battery heat is discharged through the front heat dissipation holes 52. When the ambient temperature >T (such as 30 °C), the battery generates more heat. At this time, the control rack and gear are lifted and lowered to push the wind blocking component 41 upwards to open the bypass pipe 33, introducing cold air for cooling. When the detected ambient temperature is 30 °C, the lifting stroke L2 (such as raising 10 mm) is started, and the cold air is sucked out under the drive of the cooling fan and dissipated heat through the heat dissipation fins. When the temperature is higher, the lifting stroke L3 (such as raising 15 mm) is started. The higher the stroke, the larger the opened air outlet area, the more cold air, and the better the cooling effect.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0067] Of course, the above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the basic principles of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A battery pack, characterized in that, The battery pack includes multiple individual cells (10), each of the individual cells (10) having a positive tab (11) and a negative tab (12), all the individual cells (10) are stacked together in close contact, and all the individual cells (10) are connected in series through the positive tab (11) and the negative tab (12); The positive tabs (11) and negative tabs (12) of two adjacent single cells (10) are arranged alternately, and the positive tabs (11) of the single cell (10) correspond to the positions of the negative tabs (12) of the adjacent single cell (10); The positive electrode (11) and the negative electrode (12) that are in the same position and require electrical connection are connected by a conductive connector (20). The conductive connector (20) has a receiving plate. The positive electrode (11) and the negative electrode (12) are laid flat and welded to the receiving plate. Heat dissipation fins (23) are formed on the conductive connector (20). The opening direction of the heat dissipation fins (23) is opposite to that of the single cell (10). The receiving plate includes a first welding plate (21) and a second welding plate (22) arranged at intervals. The positional relationship between the first welding plate (21) and the second welding plate (22) corresponds to the positional relationship between the positive electrode tab (11) and the negative electrode tab (12) corresponding to the position. The positive electrode tab (11) and the negative electrode tab (12) corresponding to the position are respectively welded to the first welding plate (21) and the second welding plate (22). The battery pack includes three individual cells (10), each having two sets of corresponding positive tabs (11) and negative tabs (12) that need to be electrically connected. The three individual cells (10) are connected in series through two conductive connectors (20), and each has one positive tab (11) and one negative tab (12) that are connected to an external circuit. Both the positive tab (11) and the negative tab (12) of each individual cell (10) are provided with clearance openings (13). The two clearance openings (13) on the corresponding positive tabs (11) and the negative tabs (12) that need to be electrically connected are staggered. The positive tabs (11) and the negative tabs (12) are welded together by laser welding. On the corresponding first welding plate (21) and second welding plate (22); the first welding plate (21) is welded to the positive tab (11) or negative tab (12) on the two single cells (10) located on the outer layer, and the first welding plate (21) has a clearance hole (21a) corresponding to the position of the clearance opening (13); the second welding plate (22) is welded to the positive tab (11) or negative tab (12) on the single cell (10) located in the middle; the clearance openings (13) on the two single cells (10) on the outer layer of the three single cells (10) at least partially overlap with the clearance hole (21a) to form a clearance path to avoid the laser.

2. The battery pack according to claim 1, characterized in that, The conductive connector (20) is made of aluminum, and the positive electrode (11) and the negative electrode (12) are welded to the receiving plate by laser welding process.

3. A refrigerator, characterized in that, The refrigerator includes a battery pack according to any one of claims 1 to 2, the battery pack being arranged on top of the refrigerator.

4. The refrigerator according to claim 3, characterized in that, The refrigerator has a mounting chamber (31) at the top, and the battery pack is installed in the mounting chamber (31); The installation chamber (31) is connected to the refrigerator compartment (32) of the refrigerator through a bypass pipe (33). The cold air from the refrigerator compartment (32) can enter the installation chamber (31) through the bypass pipe (33) to cool the battery pack.

5. The refrigerator according to claim 4, characterized in that, Also includes: A windbreak component (41) is movably installed in the bypass pipe (33); The drive component (42) is driven to connect with the windshield component (41); The windbreak component (41) has a first position with the bypass pipe (33) closed and a second position with the bypass pipe (33) open.

6. The refrigerator according to claim 4, characterized in that, Also includes: A cooling fan (51) is disposed within the mounting chamber (31) to generate airflow; The installation chamber (31) is connected to the outside air of the refrigerator through the heat dissipation hole (52), and a heat dissipation channel is formed between the cooling fan (51) and the heat dissipation hole (52). The inlet of the bypass pipe (33) is connected to the cold storage compartment (32), and the outlet of the bypass pipe (33) is located in the heat dissipation channel.

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