Battery pack

Abstract

The utility model relates to battery technical field discloses a kind of battery pack, its characterized in that, include: box, with upper battery compartment and lower battery compartment;Upper battery unit is set in upper battery compartment and has along first upper output terminal and second upper output terminal;Lower battery unit is set in lower battery compartment and has first lower output terminal and second lower output terminal, first upper output terminal and first lower output terminal are set in the height direction of box upside down dislocation, second upper output terminal and second lower output terminal are set in the height direction of box dislocation.First upper output terminal is connected with second lower output terminal by first conducting row, first lower output terminal is connected with second upper output terminal by second conducting row, avoid the bending of first conducting row to avoid first lower output terminal and the bending of second conducting row to avoid second lower output terminal, reduce the bending number of two conducting rows, help control conducting row temperature, conducive to temperature balance in battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery packs. Background Technology

[0002] With the development of the new energy industry, batteries have been applied in different fields and in various environments, such as portable electronic devices (such as laptops and mobile phones), electric vehicles, and energy storage systems.

[0003] Currently, the battery pack mainly consists of a housing and two battery packs arranged vertically. Each battery pack has an output terminal, and the output terminals of the two battery packs are in the same position. Two diagonally opposite output terminals in the two battery packs are connected by a conductive busbar. The conductive busbar needs to avoid other output terminals during the wiring process, which is a long path. In order to avoid the conductive busbar, bending is required. The current is concentrated at the bending point, resulting in more heat generation at the bending point, which is not conducive to the temperature balance of the battery pack. Utility Model Content

[0004] In view of this, the present invention provides a battery pack to solve the problem of temperature uniformity of the battery pack when the conductive busbar is bent to avoid other electrode terminals.

[0005] This utility model provides a battery pack, including: a housing having an upper battery compartment and a lower battery compartment arranged vertically; an upper battery unit disposed in the upper battery compartment, the upper battery unit having a first upper output terminal and a second upper output terminal spaced apart along the width direction of the housing; and a lower battery unit disposed in the lower battery compartment, the lower battery unit having a first lower output terminal and a second lower output terminal spaced apart along the width direction, the first upper output terminal and the first lower output terminal being vertically offset along the height direction of the housing, and the second upper output terminal and the second lower output terminal being offset along the height direction of the housing.

[0006] Beneficial effects: By staggering the first upper output terminal and the first lower output terminal in the height direction of the housing, and by staggering the second upper output terminal and the second lower output terminal in the height direction of the housing, the first upper output terminal is connected to the second lower output terminal through the first conductive busbar, and the first lower output terminal is connected to the second upper output terminal through the second conductive busbar. This effectively avoids the first conductive busbar bending to avoid the first lower output terminal and the second conductive busbar bending to avoid the second lower output terminal, thereby reducing the number of bends of the two conductive busbars. This facilitates the connection and routing of the conductive busbars, resulting in a smoother current path, reduced resistance and the risk of local hot spots, and helps control the temperature of the conductive busbars. It also promotes temperature balance within the battery pack, improving battery performance and lifespan. Attached Figure Description

[0007] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0008] Figure 1 This is a partial perspective view of a battery pack according to an embodiment of the present utility model;

[0009] Figure 2 for Figure 1 A simplified schematic diagram of the battery pack shown.

[0010] Explanation of reference numerals in the attached figures:

[0011] 1. Housing; 101. Top plate; 102. First side frame; 104. Second side frame; 105. Electrical compartment; 106. Upper battery compartment; 107. Lower battery compartment; 108. Housing body; 109. Top cover;

[0012] 2. Upper battery unit; 201. First upper output terminal; 202. Second upper output terminal;

[0013] 3. Lower battery unit; 301. First lower output terminal; 302. Second lower output terminal;

[0014] 5. First conductive busbar;

[0015] 6. Second conductive busbar. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] The following is combined with Figures 1 to 2 The following describes embodiments of the present invention.

[0018] According to an embodiment of the present invention, a battery pack is provided, comprising: a housing 1, an upper battery unit 2, and a lower battery unit 3. The housing 1 has an upper battery compartment 106 and a lower battery compartment 107 arranged vertically. The upper battery unit 2 is disposed in the upper battery compartment 106 and has a first upper output terminal 201 and a second upper output terminal 202 spaced apart along the width direction of the housing 1. The lower battery unit 3 is disposed in the lower battery compartment 107 and has a first lower output terminal 301 and a second lower output terminal 302 spaced apart along the width direction. The first upper output terminal 201 and the first lower output terminal 301 are vertically offset in the height direction of the housing 1, and the second upper output terminal 202 and the second lower output terminal 302 are offset in the height direction of the housing 1.

[0019] In the battery pack of this embodiment, the first upper output terminal 201 and the first lower output terminal 301 are staggered vertically along the height of the housing 1, and the second upper output terminal 202 and the second lower output terminal 302 are also staggered vertically along the height of the housing 1. The first upper output terminal 201 is connected to the second lower output terminal 302 through the first conductive busbar 5, and the first lower output terminal 301 is connected to the second upper output terminal 202 through the second conductive busbar 6. This effectively avoids the first conductive busbar 5 bending to avoid the first lower output terminal 301 and the second conductive busbar 6 bending to avoid the second lower output terminal 302, thereby reducing the number of bends of the two conductive busbars, facilitating the connection and routing of the conductive busbars, making the current path smoother, reducing resistance and the risk of local hot spots, helping to control the temperature of the conductive busbars, promoting temperature balance within the battery pack, and improving battery performance and lifespan.

[0020] In one embodiment, in the width direction, the first upper output terminal 201 and the second upper output terminal 202 are located between the first lower output terminal 301 and the second lower output terminal 302. In other words, the first upper output terminal 201 and the second upper output terminal 202 are inside, and the first lower output terminal 301 and the second lower output terminal 302 are outside, resulting in a larger distance between the first lower output terminal 301 and the second lower output terminal 302. This makes reasonable use of the space between the first lower output terminal 301 and the second lower output terminal 302, facilitating the arrangement of high-voltage electrical components and preventing interference between high-voltage electrical components and low-voltage electrical components.

[0021] It is understood that, in another embodiment, in the width direction, the first lower output terminal 301 and the second lower output terminal 302 are located between the first upper output terminal 201 and the second upper output terminal 202.

[0022] In one embodiment, the housing 1 includes a top plate 101, and the distance L1 between the first upper output terminal 201 and the second upper output terminal 202 and the top plate 101 is 5mm-30mm. L1 cannot be too large or too small. If L1 is too large, the height of the housing 1 will be high, occupying a large vertical space, which is not conducive to the arrangement of the battery pack. If L1 is too small, the minimum creepage distance and clearance requirements of the electrical equipment cannot be met, and the insulation between the top cover 109 and the output terminals is prone to failure, resulting in a greater safety risk.

[0023] Therefore, within the aforementioned range, controlling the height of the housing 1 with L1 is beneficial for the arrangement of the battery pack; it can also meet the minimum creepage distance and clearance requirements of electrical equipment, ensure the insulation effect between the top cover 109 and the output terminals, and improve the safety performance of the battery pack.

[0024] Preferably, L1 is 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, or within the range of any two of the above values.

[0025] In one embodiment, in the width direction, the distance L2 between the first upper output terminal 201 and the second upper output terminal 202 is L2, the width of the upper battery compartment 106 is W1, and L2 / W1 is 0.3-0.8; the distance between the first lower output terminal 301 and the second lower output terminal 302 is L3; the width of the lower battery compartment 107 is W2, and L3 / W2 is 0.5-0.95. L2 / W1 and L3 / W2 cannot be too large or too small. If L2 / W1 and L3 / W2 are too large, the length of the conductive busbar is too long, the current flow path becomes longer, resulting in increased resistance and higher temperature of the conductive busbar, which is detrimental to temperature balance within the battery pack. If L2 / W1 and L3 / W2 are too small, it is not conducive to the arrangement of other electrical components, the wiring of the battery pack becomes more complex, and the cost is higher.

[0026] Therefore, within the aforementioned range, L2 / W1 and L3 / W2 control the length of the busbars and the current path length, thereby reducing the number of bends in the two busbars, facilitating the connection and routing of the busbars, making the current path smoother, reducing resistance and the risk of local hot spots, helping to control the temperature of the busbars, which is beneficial to the temperature balance within the battery pack, and improving battery performance and lifespan; it can also facilitate the arrangement of other electrical components, reduce wiring complexity, and save costs.

[0027] Preferably, L2 / W1 is 0.3, 0.31, 0.32, 0.35, 0.36, 0.38, 0.4, 0.41, 0.42, 0.44, 0.46, 0.48, 0.5, 0.51, 0.52, 0.55, 0.56, 0.58, 0.6, 0.61, 0.62, 0.65, 0.66, 0.68, 0.7, 0.71, 0.72, 0.75, 0.76, 0.78, 0.8, or any of the above. Within the range of the two values, L3 / W2 is 0.5, 0.51, 0.52, 0.55, 0.56, 0.58, 0.6, 0.61, 0.62, 0.65, 0.66, 0.68, 0.7, 0.71, 0.72, 0.75, 0.76, 0.78, 0.8, 0.82, 0.84, 0.86, 0.88, 0.9, 0.92, 0.93, 0.95, or falls within the range of any two values ​​listed above.

[0028] It should be noted that W1 and W2 can be the same or different, and the design needs to be tailored to the specific circumstances.

[0029] In one embodiment, the housing 1 has a first side frame 102 and a second side frame 104 disposed opposite to each other along the width direction. A first lower output terminal 301 is disposed near the first side frame 102, and a second lower output terminal 302 is disposed near the second side frame 104. Along the width direction, the distance L4 between the inner side of the first side frame 102 and the first lower output terminal 301 is greater than or equal to 5 mm, and the distance L5 between the inner side of the second side frame 104 and the second lower output terminal 302 is greater than or equal to 5 mm. L4 and L5 cannot be too small. If L4 and L5 are too small, the length of the conductive busbar is too long, the current flow path becomes longer, resulting in increased resistance and higher temperature of the conductive busbar, which is not conducive to temperature balance within the battery pack.

[0030] Therefore, within the aforementioned range, L4 and L5 control the length of the conductor and the current path, thereby reducing the number of bends in the two conductors, facilitating the connection and routing of the conductors, making the current path smoother, reducing resistance and the risk of local hot spots, helping to control the temperature of the conductors, which is beneficial to the temperature balance within the battery pack, and improving battery performance and lifespan.

[0031] Preferably, L4 is 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm or within any two of the above values, and L5 is 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm or within any two of the above values.

[0032] In one embodiment, the first upper output terminal 201 and the second lower output terminal 302 are connected via a first conductive busbar 5, and the second upper output terminal 202 and the first lower output terminal 301 are connected via a second conductive busbar 6. The housing 1 also has an electrical compartment 105, in which the first conductive busbar 5 and the second conductive busbar 6 are disposed. The conductive busbars are centrally arranged in an independent electrical compartment 105, which facilitates unified insulation protection treatment, enhances insulation safety, and also facilitates later maintenance, replacement or upgrades. This frees up more space for battery modules, cooling systems or other functional components, saving internal space in the housing 1.

[0033] In one embodiment, along the length of the housing 1, the electrical compartment 105 is located on one side of the upper battery compartment 106 and the lower battery compartment 107. This physically isolates the electrical components from the battery modules, forming a clear functional area, avoiding mutual interference between high-voltage electrical components and battery cells, and improving the overall system integration and space utilization. With all electrical components concentrated on one side, maintenance, replacement, or upgrades are more convenient, significantly improving subsequent maintenance efficiency and reducing service costs.

[0034] In one embodiment, the enclosure 1 includes a main body 108 and a top cover 109, which enclose a receiving space. A first partition and a second partition are provided within the receiving space. The first partition divides the receiving space into an electrical compartment 105 and a battery compartment, while the second partition divides the battery compartment into an upper battery compartment 106 and a lower battery compartment 107. The first partition physically isolates the high-voltage electrical components from the battery module, and the second partition further divides the battery compartment into upper and lower areas, facilitating optimized module layout, clear functional zoning, avoiding mutual interference, and improving the overall system's safety and reliability. Separating the electrical compartment 105 from the battery compartment effectively prevents safety risks caused by overheating or short circuits in the conductive pads and facilitates unified insulation protection within the electrical compartment 105.

[0035] Furthermore, the main body 108 includes a bottom plate, a first side frame 102, a second side frame 104, a first end frame, and a second end frame. The bottom plate, the first side frame 102, the second side frame 104, the first end frame, and the second end frame enclose to form a lower battery compartment 107. The top cover 109 includes a top plate 101 and four side plates. The top plate 101 and the four side plates enclose to form the lower battery compartment 107.

[0036] In one embodiment, the upper battery unit 2 includes multiple upper battery packs arranged along the width direction, and a first insulating member is provided between two adjacent upper battery packs in the upper battery unit 2; the lower battery unit 3 includes multiple lower battery packs arranged along the width direction, and a second insulating member is provided between two adjacent lower battery packs in the lower battery unit 3. The insulating member can effectively block the electrical connection between adjacent battery packs, prevent the risk of short circuits caused by mechanical deformation, thermal expansion, vibration or electrolyte leakage, and improve electrical safety.

[0037] In one embodiment, the upper battery pack includes multiple upper individual cells arranged along the length of the housing. The upper battery unit 2 also includes a first data acquisition harness assembly extending along the arrangement direction of the upper individual cells and connected to a first upper output terminal 201 and a second upper output terminal 202. The lower battery pack includes multiple lower individual cells arranged along the length of the housing. The lower battery unit 3 also includes a second data acquisition harness assembly extending along the arrangement direction of the lower individual cells and connected at one end along its length to a first lower output terminal 301 and a second lower output terminal 302. The first data acquisition harness assembly is used to acquire parameters such as voltage and temperature of each upper individual cell in the upper battery pack, and the second data acquisition harness assembly is used to acquire parameters such as voltage and temperature of each lower individual cell in the lower battery pack. The first and second data acquisition harness assemblies transmit the acquired parameter information to the battery management system, which then manages and monitors the status of each battery in the battery pack.

[0038] Furthermore, both the first and second acquisition harness assemblies are FPC flexible circuit boards. FPC flexible circuit boards are characterized by being thin, flexible, and foldable, and can provide better electrical performance, including lower noise interference and higher transmission speed.

[0039] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: The housing (1) has an upper battery compartment (106) and a lower battery compartment (107) arranged vertically. An upper battery unit (2) is disposed in the upper battery compartment (106), and the upper battery unit (2) has a first upper output terminal (201) and a second upper output terminal (202) spaced apart along the width direction of the housing (1); The lower battery unit (3) is disposed in the lower battery compartment (107). The lower battery unit (3) has a first lower output terminal (301) and a second lower output terminal (302) spaced apart along the width direction. The first upper output terminal (201) and the first lower output terminal (301) are offset vertically in the height direction of the housing (1). The second upper output terminal (202) and the second lower output terminal (302) are offset vertically in the height direction of the housing (1).

2. The battery pack according to claim 1, characterized in that, In the width direction, the first upper output terminal (201) and the second upper output terminal (202) are located between the first lower output terminal (301) and the second lower output terminal (302).

3. The battery pack according to claim 1, characterized in that, In the width direction, the first lower output terminal (301) and the second lower output terminal (302) are located between the first upper output terminal (201) and the second upper output terminal (202).

4. The battery pack according to any one of claims 1 to 3, characterized in that, The housing (1) includes a top plate (101), and the distance L1 between the first upper output terminal (201) and the second upper output terminal (202) and the top plate (101) in the height direction of the battery pack is 5mm-30mm.

5. The battery pack according to any one of claims 1 to 3, characterized in that, In the width direction, the distance between the first upper output terminal (201) and the second upper output terminal (202) is L2, the width of the upper battery compartment (106) is W1, and L2 / W1 is 0.3-0.8; the distance between the first lower output terminal (301) and the second lower output terminal (302) is L3; the width of the lower battery compartment (107) is W2, and L3 / W2 is 0.5-0.

95.

6. The battery pack according to any one of claims 1 to 3, characterized in that, The housing (1) has a first side frame (102) and a second side frame (104) arranged opposite to each other along the width direction. The first lower output terminal (301) is arranged close to the first side frame (102), and the second lower output terminal (302) is arranged close to the second side frame (104). Along the width direction, the distance L4 between the inner side of the first side frame (102) and the first lower output terminal (301) is greater than or equal to 5 mm, and the distance L5 between the inner side of the second side frame (104) and the second lower output terminal (302) is greater than or equal to 5 mm.

7. The battery pack according to any one of claims 1 to 3, characterized in that, The first upper output terminal (201) and the second lower output terminal (302) are connected by a first conductive bus (5), and the second upper output terminal (202) and the first lower output terminal (301) are connected by a second conductive bus (6). The housing (1) also has an electrical compartment (105), and the first conductive bus (5) and the second conductive bus (6) are disposed in the electrical compartment (105).

8. The battery pack according to claim 7, characterized in that, Along the length of the housing (1), the electrical compartment (105) is located on one side of the upper battery compartment (106) and the lower battery compartment (107).

9. The battery pack according to claim 8, characterized in that, The enclosure (1) includes a main body (108) and a top cover (109). The main body (108) and the top cover (109) form an accommodating space. A first partition and a second partition are provided in the accommodating space. The first partition divides the accommodating space into an electrical compartment (105) and a battery compartment. The second partition divides the battery compartment into an upper battery compartment (106) and a lower battery compartment (107).

10. The battery pack according to any one of claims 1 to 3, characterized in that, The upper battery unit (2) includes a plurality of upper battery packs arranged along the width direction. In the upper battery unit (2), a first insulating member is provided between two adjacent upper battery packs. The lower battery unit (3) includes a plurality of lower battery packs arranged along the width direction. In the lower battery unit (3), a second insulating member is provided between two adjacent lower battery packs.

11. The battery pack according to claim 10, characterized in that, The upper battery pack includes multiple upper single cells arranged along the length direction of the housing. The upper battery unit (2) also includes a first acquisition harness assembly. The first acquisition harness assembly extends along the arrangement direction of the upper single cells. One end of the first acquisition harness assembly along the length direction is connected to the first upper output terminal (201) and the second upper output terminal (202). The lower battery pack includes multiple lower individual batteries arranged along the length direction of the housing. The lower battery unit (3) also includes a second acquisition harness assembly, which extends along the arrangement direction of the lower individual batteries. One end of the second acquisition harness assembly along the length direction is connected to the first lower output terminal (301) and the second lower output terminal (302).

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