Pouch battery busbar assembly and pouch battery pack

Abstract

The utility model relates to soft package lithium ion battery connection structure technical field, concretely provides a kind of soft package battery busbar assembly and soft package battery group, comprising: first insulating casing, positive busbar, negative busbar, second insulating casing, positive total busbar, third insulating casing, negative total busbar and heat sink, wherein, first insulating casing has first accommodating cavity and second accommodating cavity, and first accommodating cavity and second accommodating cavity are along the length direction of battery cabin setting, and mutually isolated;Positive busbar is located in first accommodating cavity, and the positive lug of soft package battery is all penetrated first insulating casing and positive busbar electrical connection;Negative busbar is located in second accommodating cavity, and the negative lug of soft package battery is all penetrated first insulating casing and negative busbar electrical connection;Wherein, first insulating casing, second insulating casing and third insulating casing are made of heat-conducting insulating material.The utility model solves the problem of poor heat dissipation effect of busbar in the prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of soft-pack lithium-ion battery connection structure, specifically providing a soft-pack battery bus assembly and a soft-pack battery pack. Background Technology

[0002] The soft-pack lithium-ion battery for underwater vehicles is a type of rechargeable battery used in underwater vehicles. It has advantages such as high energy density and light weight, but it also has some drawbacks.

[0003] Traditional soft-pack lithium-ion battery bus structures are mostly made of copper busbars or other conductive materials, which are located on the top of the battery tabs and fixed by welding. This is a single-layer structure. Such bus structures have low current carrying capacity and cause serious heat generation.

[0004] Therefore, designing a new type of bus structure with large current carrying capacity and good heat dissipation is of great significance.

[0005] Practical content This invention provides a soft-pack battery bus assembly and a soft-pack battery pack, which solves the problem of poor heat dissipation of the bus in the prior art.

[0006] In a first aspect, this utility model provides a soft-pack battery bus assembly, comprising: The first insulating shell has a first accommodating cavity and a second accommodating cavity, and the first accommodating cavity and the second accommodating cavity are arranged along the length direction of the battery compartment and are isolated from each other; A positive electrode busbar is disposed in the first accommodating cavity, and the positive electrode tabs of the soft-pack battery all penetrate the first insulating shell and are electrically connected to the positive electrode busbar; The negative electrode busbar is located in the second accommodating cavity, and the negative electrode tabs of the soft-pack battery all penetrate the first insulating shell and are electrically connected to the negative electrode busbar. The second insulating housing has a third accommodating cavity and is detachably connected to the first insulating housing; A positive busbar is disposed in the third accommodating cavity and electrically connected to the positive busbar. The third insulating housing has a fourth accommodating cavity and is detachably connected to the first insulating housing; A negative electrode busbar is located in the fourth accommodating cavity and is electrically connected to the negative electrode busbar. A heat dissipation component is disposed on the outer surface of the first insulating shell and extends along the length of the first insulating shell; The first insulating shell, the second insulating shell, and the third insulating shell are made of thermally conductive insulating material.

[0007] According to the soft-pack battery bus assembly provided by this utility model, the positive bus and the negative bus are respectively provided with a first male terminal and a first female terminal at their two ends; The positive electrode busbar and the negative electrode busbar are respectively provided with a second male connector and a second female connector; The positive electrode busbar and the negative electrode busbar are respectively provided with a second female connector; The first male connector, which is adjacent to the positive electrode busbar and the negative electrode busbar, is connected to the second female connector.

[0008] According to the soft-pack battery bus assembly provided by this utility model, the thermal conductivity of the heat dissipation component is greater than 500 W / (m·K).

[0009] According to the soft-pack battery bus assembly provided by this utility model, the heat dissipation component is made of highly oriented pyrolytic graphite.

[0010] According to the soft-pack battery bus assembly provided by this utility model, the thermally conductive insulating material includes alumina ceramic or boron nitride ceramic.

[0011] According to the soft-pack battery bus assembly provided by this utility model, the first accommodating cavity has a plurality of independent and superimposed first sub-cavities in the height direction; The positive busbar includes multiple positive busbars, and the multiple positive busbars are respectively disposed in multiple first sub-cavities; Multiple positive busbars are electrically connected to the positive main busbar at their ends.

[0012] According to the soft-pack battery bus assembly provided by this utility model, the second accommodating cavity has a plurality of mutually independent and superimposed second sub-cavities in the height direction; The negative busbar includes multiple negative busbars, and the multiple negative busbars are respectively disposed in multiple second sub-cavities; Multiple negative busbars are electrically connected to the negative main busbar at their ends.

[0013] Secondly, this utility model also provides a pouch battery pack, including the pouch battery bus assembly as described above, and further including: Battery compartment; Multiple soft-pack battery units are provided, all of which are disposed within the battery compartment; An insulating buffer plate has multiple layers disposed between adjacent pouch battery cells for isolating the pouch battery cells. The pouch battery bus assembly is mounted above the pouch battery unit, and the positive bus is electrically connected to multiple positive tabs of the pouch battery unit, and the negative bus is electrically connected to multiple negative tabs of the pouch battery unit.

[0014] The beneficial effects of this utility model are: This utility model provides a soft-pack battery bus assembly. By improving the traditional single-layer copper busbar into a single-layer or multi-layer busbar, and adding a thermally conductive insulating shell and heat dissipation components, it can achieve good heat dissipation for the single-layer or multi-layer busbar, thus ensuring the safety of the battery pack. When a multi-layer busbar is set inside the first insulating shell, both the current carrying capacity and heat dissipation can be increased. Specifically: The first insulating shell provides support and insulation for both the positive and negative busbars. Furthermore, it allows for the installation of thicker, higher-current-carrying single-layer busbars. Alternatively, multiple layers of copper busbars can be installed to increase current carrying capacity and reduce heat generation. By using a thermally conductive insulating material for the first insulating shell, heat can be directly conducted and dissipated from the positive and negative busbars, reducing safety risks caused by overheating.

[0015] By setting up a main busbar for positive and negative electrodes, it is possible to achieve current conduction for all positive and negative electrode battery packs, which makes it more convenient when expanding battery packs and outputting current to the outside.

[0016] By configuring the heat sink and extending it along the length of the first insulating shell, the heat dissipated from the first insulating shell can be dissipated in a timely manner, increasing the heat dissipation area and further enhancing the heat dissipation efficiency.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the 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.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the soft-pack battery busbar provided by this utility model; Figure 2 This is a schematic diagram showing the opening positions of the first and second accommodating cavities provided by this utility model; Figure 3 This is a schematic diagram of the connection structure between the positive and negative busbars and the positive and negative main busbars provided by this utility model; Figure 4This is one of the three-dimensional structural diagrams of the positive and negative busbars provided by this utility model; Figure 5 This is the second schematic diagram of the three-dimensional structure of the positive and negative busbars provided by this utility model; Figure 6 This is a schematic diagram showing the location of the second female connector on the positive busbar provided by this utility model; Figure 7 This is a schematic diagram of the stacked structure of multiple positive busbars in the first accommodating cavity provided by this utility model; Figure 8 This is a three-dimensional structural diagram of the soft-pack battery pack provided by this utility model.

[0020] 1. First insulating shell; 101. First accommodating cavity; 1011. First sub-cavity; 102. Second accommodating cavity; 2. Positive busbar; 201. First male connector; 202. First female connector; 203. Positive busbar plate; 3. Negative busbar; 4. Second insulating housing; 5. Positive electrode busbar; 501. Second female connector; 6. Third insulating housing; 7. Negative electrode busbar; 8. Heat dissipation components; 9. Battery compartment; 10. Soft-pack battery unit; 11. Insulating buffer plate; 12. Positive electrode; 13. Negative electrode. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions 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.

[0022] In the description of the embodiments of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0024] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0026] The following is combined Figures 1 to 8 The embodiments shown illustrate the technical solution of this utility model: This utility model embodiment provides a soft-pack battery bus assembly, such as Figures 1 to 3 As shown, it includes: The first insulating housing 1 has a first accommodating cavity 101 and a second accommodating cavity 102, and the first accommodating cavity 101 and the second accommodating cavity 102 are arranged along the length direction of the battery compartment 9 and are isolated from each other; The positive busbar 2 is located in the first accommodating cavity 101, and the positive electrode tabs 12 of the soft-pack battery all penetrate the first insulating shell 1 and are electrically connected to the positive busbar 2. The negative electrode busbar 3 is located in the second accommodating cavity 102. The negative electrode tabs 13 of the soft-pack battery all penetrate the first insulating shell 1 and are electrically connected to the negative electrode busbar 3. The second insulating housing 4 has a third accommodating cavity and is detachably connected to the first insulating housing 1; Positive busbar 5 is located in the third accommodating cavity and is electrically connected to positive busbar 2; The third insulating housing 6 has a fourth accommodating cavity and is detachably connected to the first insulating housing 1; The negative busbar 7 is located in the fourth accommodating cavity and is electrically connected to the positive and negative busbars 3; Heat sink 8 is disposed on the outer surface of the first insulating housing 1 and extends along the length of the first insulating housing 1; The first insulating shell 1, the second insulating shell 4, and the third insulating shell 6 are made of thermally conductive insulating material.

[0027] In this embodiment, the first insulating shell 1 is made into a plate-shaped elongated strip with a hollow internal structure. It is divided into a first accommodating cavity 101 and a second accommodating cavity 102 by an insulating partition along its width. Both the first accommodating cavity 101 and the second accommodating cavity 102 are single cavities and do not have a stacked structure. The positive electrode busbar 2 and the negative electrode busbar 3 are both copper plates conforming to the cavity shapes of the first accommodating cavity 101 and the second accommodating cavity 102. Multiple copper positive electrode tabs 12 and negative electrode tabs 13 are welded to both sides of the copper plates for connection to the tabs of the pouch battery. The first accommodating cavity 101 and the second accommodating cavity 102 are arranged along the length of the battery compartment 9 to cover the entire battery layout area, allowing all batteries to be welded equidistantly to the positive and negative busbars, while also increasing the current carrying capacity of the busbars.

[0028] The positive terminal busbar 5 is located at one end of the busbar and is electrically connected to the positive terminal busbar 2. The axes of the positive terminal busbar 5 and the positive terminal busbar 2 are perpendicular to each other, which allows the positive terminal output port to be led out from the side, saving installation space for the entire battery pack. The negative terminal busbar 7 is located at the other end of the busbar and is electrically connected to the negative terminal busbar 3. Its installation structure with the negative terminal busbar 3 is the same as that of the positive terminal busbar, and will not be described again here.

[0029] The second insulating shell 4 and the third insulating shell 6 are respectively fitted onto the positive electrode busbar 5 and the negative electrode busbar 7. The first insulating shell 1, the second insulating shell 4, and the third insulating shell 6 are all made of thermally conductive and insulating materials, and in this embodiment, alumina ceramic is preferred.

[0030] Alumina ceramics can efficiently transfer heat while isolating electrical current; their volume resistivity is extremely high, typically in the range of 10¹⁰. 4 -10¹ 6 The thermal conductivity is between Ω·cm (at 25°C). This characteristic allows it to effectively block current paths, preventing damage to electronic components due to leakage short circuits, making it an ideal insulating substrate. Its thermal conductivity varies with the alumina content and can be adjusted according to requirements. For example, the thermal conductivity of 95% alumina ceramic is approximately 17-20 W / (m·K), while 99% high-purity products can reach 25-30 W / (m·K), far exceeding that of ordinary insulating plastics, enabling rapid heat dissipation from electronic components.

[0031] The heat sink 8 can be made of a material with high thermal conductivity, such as graphene (single layer) or metal matrix composite material (such as aluminum-based silicon carbide). In this embodiment, graphene (single layer) is preferred, with a thermal conductivity of up to 500-530 W / (m·K).

[0032] This utility model provides a soft-pack battery bus assembly that improves upon the traditional single-layer copper busbar by replacing it with a single-layer or multi-layer busbar. By adding a thermally conductive insulating shell and a heat sink 8, it achieves excellent heat dissipation for the single-layer or multi-layer busbar, ensuring the safety of the battery pack. When a multi-layer busbar is installed within the first insulating shell 1, both the current carrying capacity and heat dissipation are increased. Specifically: The first insulating shell 1 provides support and insulation for the positive busbar 2 and the negative busbar 3. Furthermore, the first insulating shell 1 allows for the installation of thicker, higher-current-carrying single-layer busbars. Alternatively, multiple layers of copper busbars can be installed to increase current carrying capacity and reduce heat generation. By using a thermally conductive insulating material for the first insulating shell 1, heat can be directly conducted and dissipated from the positive and negative busbars 3, reducing safety risks caused by overheating.

[0033] By setting up the positive and negative terminal busbar 7, it is possible to achieve the charging and conduction of all positive and negative battery packs, which is more convenient when expanding the battery pack and outputting current to the outside.

[0034] By setting the heat sink 8 and making it extend along the length of the first insulating shell, the heat conducted out by the first insulating shell 1 can be dissipated in a timely manner, increasing the heat dissipation area and further enhancing the heat dissipation efficiency.

[0035] According to the soft-pack battery bus assembly provided by this utility model, such as Figures 4 to 6 The positive busbar 2 and the negative busbar 3 are respectively provided with a first male connector 201 and a first female connector 202 at both ends; A second female connector 501 is provided on the positive electrode busbar 5 and the negative electrode busbar 7 respectively; The first male connector 201, which is adjacent to the positive terminal busbar 5 and the negative terminal busbar 7, is connected to the second female connector 501.

[0036] In this embodiment, the two ends of the positive and negative busbars 3 are configured as male and female connectors. This facilitates connection to the main busbar and allows for seamless splicing of multiple busbars during capacity expansion of the battery compartment 9, requiring only the installation of a retaining sleeve at the connection point. Connecting the first male connector 201 to the second female connector 501 also enables the individual replacement of a specific busbar or the main busbar.

[0037] According to the soft-pack battery bus assembly provided by this utility model, the thermal conductivity of the heat sink 8 is greater than 500 W / (m·K).

[0038] In some embodiments, materials with a thermal conductivity greater than 500 W / (m·K) include: Graphene (single layer) has a thermal conductivity of 500–530 W / (m·K); Natural diamond has a thermal conductivity of about 500–600 W / (m·K), while high-quality synthetic diamond (prepared by chemical vapor deposition CVD) can reach 600–1000 W / (m·K) and has no obvious anisotropy (uniform thermal conductivity in all directions).

[0039] According to the soft-pack battery bus assembly provided by this utility model, the heat sink 8 is made of highly oriented pyrolytic graphite.

[0040] Highly oriented pyrolytic graphite (HOPG) has a thermal conductivity of 800–1500 W / (m·K). Its core advantage as a heat sink lies in its extreme in-plane thermal conductivity and precise directional heat dissipation capability, while also being lightweight, thin, and stable.

[0041] According to the soft-pack battery bus assembly provided by this utility model, the thermally conductive and insulating material includes alumina ceramic or boron nitride ceramic.

[0042] In this embodiment, alumina ceramics can efficiently transfer heat while isolating current; its volume resistivity is extremely high, typically around 10¹⁰. 4 -10¹ 6The thermal conductivity is between Ω·cm (at 25°C). This characteristic allows it to effectively block current paths, preventing damage to electronic components due to leakage short circuits, making it an ideal insulating substrate. Its thermal conductivity varies with the alumina content and can be adjusted according to requirements. For example, the thermal conductivity of 95% alumina ceramic is approximately 17-20 W / (m·K), while 99% high-purity products can reach 25-30 W / (m·K), far exceeding that of ordinary insulating plastics, enabling rapid heat dissipation from electronic components.

[0043] The thermal conductivity of pure boron nitride ceramics can reach 170–220 W / (m·K), with some high-purity, high-density products even exceeding 300 W / (m·K). This value is 5–10 times that of traditional alumina ceramics (17–30 W / (m·K)) and close to that of aluminum alloys (237 W / (m·K)), enabling rapid heat dissipation from high-power devices and preventing localized overheating. Simultaneously, its volume resistivity at room temperature is as high as 10¹⁰. 4 –10¹ 6 Ω·cm, with a breakdown voltage of approximately 10–15 kV / mm, far exceeding that of typical insulating plastics (which typically have a breakdown voltage of < 3 kV / mm).

[0044] According to the soft-pack battery bus assembly provided by this utility model, such as Figure 7 As shown, the first accommodating cavity 101 has a plurality of independent and superimposed first sub-cavities 1011 in the height direction; The positive busbar 2 includes multiple positive busbars 203, which are respectively disposed in multiple first sub-cavities 1011; Multiple positive busbars 203 are electrically connected to the positive main busbar 5 at their ends.

[0045] In this embodiment, the first accommodating cavity 101 is divided into three independent first sub-cavities 1011 in the height direction. Each first sub-cavity 1011 is provided with a positive electrode busbar 203, one end of which mates with the male and female connectors of the positive electrode main busbar 5. This can further increase the total current carrying capacity of the positive electrode busbar 2 and reduce heat generation. Of course, four or five layers can also be provided, which can be flexibly selected according to the actual manufacturing requirements.

[0046] According to the soft-pack battery bus assembly provided by this utility model, such as Figure 7 As shown, the second accommodating cavity 102 has multiple independent and superimposed second sub-cavities in the height direction; The negative busbar 3 includes multiple negative busbars, which are respectively disposed in multiple second sub-cavities; Multiple negative busbars are electrically connected to the negative busbar 7 at the end.

[0047] This embodiment is consistent with the structure, principle and effect of the above-described "dividing the first accommodating cavity 101 into three independent first sub-cavities 1011 in the height direction", and will not be repeated here.

[0048] This utility model also provides a soft-pack battery pack, such as Figure 8 As shown, the pouch battery bus assembly provided in the above embodiments further includes: Battery compartment 9; Multiple soft-pack battery units 10 are provided, all of which are located inside the battery compartment 9; An insulating buffer plate 11 has multiple plates disposed between adjacent pouch battery cells 10 for isolating the pouch battery cells 10. The pouch battery bus assembly is mounted on top of the pouch battery unit 10, and the positive bus 2 is electrically connected to the plurality of positive tabs 12 of the pouch battery unit 10, and the negative bus 3 is electrically connected to the plurality of negative tabs 13 of the pouch battery unit 10.

[0049] In this embodiment, the pouch battery unit 10 is composed of multiple pouch battery blocks. The figure shows four pouch battery units 10, as well as four sets of positive and negative busbars 3. Two positive busbars 5 are connected end to end, and two negative busbars 7 are connected end to end, thus forming a modular pouch battery pack that can be flexibly expanded or reduced according to needs.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A soft-pack battery bus assembly, characterized in that, include: The first insulating shell has a first accommodating cavity and a second accommodating cavity, and the first accommodating cavity and the second accommodating cavity are arranged along the length direction of the battery compartment and are isolated from each other; A positive electrode busbar is disposed in the first accommodating cavity, and the positive electrode tabs of the soft-pack battery all penetrate the first insulating shell and are electrically connected to the positive electrode busbar; The negative electrode busbar is located in the second accommodating cavity, and the negative electrode tabs of the soft-pack battery all penetrate the first insulating shell and are electrically connected to the negative electrode busbar. The second insulating housing has a third accommodating cavity and is detachably connected to the first insulating housing; A positive busbar is disposed in the third accommodating cavity and electrically connected to the positive busbar. The third insulating housing has a fourth accommodating cavity and is detachably connected to the first insulating housing; A negative electrode busbar is located in the fourth accommodating cavity and is electrically connected to the negative electrode busbar. A heat dissipation component is disposed on the outer surface of the first insulating shell and extends along the length of the first insulating shell; The first insulating shell, the second insulating shell, and the third insulating shell are made of thermally conductive insulating material.

2. The soft-pack battery bus assembly according to claim 1, characterized in that, The positive bus and the negative bus are respectively provided with a first male connector and a first female connector at both ends; The positive electrode busbar and the negative electrode busbar are respectively provided with a second female connector; The first male connector, which is adjacent to the positive electrode busbar and the negative electrode busbar, is connected to the second female connector.

3. The soft-pack battery bus assembly according to claim 1, characterized in that, The thermal conductivity of the heat sink is greater than 500 W / (m·K).

4. The soft-pack battery bus assembly according to claim 3, characterized in that, The heat sink is made of highly oriented pyrolytic graphite.

5. The soft-pack battery bus assembly according to claim 1, characterized in that, The thermally conductive and insulating material includes alumina ceramic or boron nitride ceramic.

6. The soft-pack battery bus assembly according to claim 1, characterized in that, The first accommodating cavity has multiple independent and superimposed first sub-cavities in the height direction; The positive busbar includes multiple positive busbars, and the multiple positive busbars are respectively disposed in multiple first sub-cavities; Multiple positive busbars are electrically connected to the positive main busbar at their ends.

7. The soft-pack battery bus assembly according to claim 1, characterized in that, The second accommodating cavity has multiple independent and superimposed second sub-cavities in the height direction; The negative busbar includes multiple negative busbars, and the multiple negative busbars are respectively disposed in multiple second sub-cavities; Multiple negative busbars are electrically connected to the negative main busbar at their ends.

8. A pouch battery pack, characterized in that, Including the pouch battery bus assembly as described in any one of claims 1-7, further comprising: Battery compartment; Multiple soft-pack battery units are provided, all of which are disposed within the battery compartment; An insulating buffer plate has multiple plates disposed between adjacent pouch battery cells for isolating the pouch battery cells. The pouch battery bus assembly is mounted above the pouch battery unit, and the positive bus is electrically connected to multiple positive tabs of the pouch battery unit, and the negative bus is electrically connected to multiple negative tabs of the pouch battery unit.

Images