Battery device assembly method and battery device

Abstract

The application relates to the technical field of batteries, and discloses a battery device assembling method and a battery device. The battery device assembling method comprises the following steps: stacking a plurality of batteries along a first direction; electrically connecting a plurality of collecting connecting pieces to the plurality of batteries; after the plurality of batteries and the plurality of collecting connecting pieces are placed in a battery box together, electrically connecting the plurality of collecting connecting pieces to collecting structures respectively, so that the collecting structures collect information of the plurality of batteries. By electrically connecting the plurality of collecting connecting pieces to the plurality of batteries before the batteries are placed in the battery box, the problem that the batteries and the battery box cannot provide mounting space for a welding gun is solved, and the connection reliability between the batteries and the collecting connecting pieces is improved. Since the collecting connecting pieces are connected to the batteries before the batteries are placed in the battery box, after the batteries are placed in the battery box, only the collecting connecting pieces and the collecting structures need to be connected, so that the overall process operation after the batteries are placed in the battery box is facilitated.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery assembly method and a battery device. Background Technology

[0002] In related technologies, during the assembly of battery devices, the battery is typically placed into a battery box first, and then conductive components are welded to the battery to achieve electrical connections or testing functions. However, because the space between the battery and the battery box is relatively narrow after placement, it does not provide sufficient space for welding tools, leading to welding difficulties and affecting the reliability of the connection between the battery and conductive components. Summary of the Invention

[0003] This invention provides a battery assembly method and a battery device, which is convenient to assemble and has high reliability.

[0004] According to a first aspect of the present invention, a battery device assembly method is provided, comprising the following steps:

[0005] Multiple batteries are stacked along the first direction;

[0006] Multiple data acquisition connectors are electrically connected to multiple batteries;

[0007] After placing multiple batteries and multiple data acquisition connectors together inside the battery box, the multiple data acquisition connectors are electrically connected to the data acquisition structure, so that the data acquisition structure can acquire information from the multiple batteries.

[0008] According to a second aspect of the present invention, a battery device is provided, which is assembled using the above-described battery device assembly method, the battery device comprising:

[0009] Multiple batteries, wherein the multiple batteries are stacked along a first direction;

[0010] A low-voltage signal acquisition component includes an acquisition structure and multiple acquisition connectors, one end of each acquisition connector is electrically connected to a plurality of batteries, and the other end of each acquisition connector is electrically connected to the acquisition structure.

[0011] A frame surrounds the plurality of batteries, and at least one of the acquisition connectors and the battery are connected at a position lower than the top surface of the frame along the first direction.

[0012] The battery assembly method of this invention increases the energy density of the battery device by stacking multiple batteries along a first direction. If the batteries are placed in the battery box and then welded to the data acquisition connectors, the space between the batteries and the battery box is relatively narrow, insufficient for welding tools such as welding torches, leading to welding difficulties and affecting the reliability of the connection between the batteries and the data acquisition connectors. By setting the batteries and data acquisition connectors as separate structures, multiple data acquisition connectors are electrically connected to multiple batteries before the batteries are placed in the battery box, solving the problem of insufficient space for welding torches between the batteries and the battery box and improving the reliability of the connection between the batteries and the data acquisition connectors. After placing multiple batteries and multiple data acquisition connectors together in the battery box, the multiple data acquisition connectors are electrically connected to the data acquisition structure separately. Since the data acquisition connectors are already connected to the batteries before being placed in the battery box, only the data acquisition connectors need to be connected to the data acquisition structure after the batteries are placed in the battery box, facilitating overall process operations after the batteries are placed in the battery box. By electrically connecting multiple data acquisition connectors to the data acquisition structure separately, the data acquisition structure collects information from multiple batteries to monitor battery performance indicators such as charge level.

[0013] The battery device of this invention increases energy density by stacking multiple batteries along a first direction. By configuring the batteries and data acquisition connectors as separate structures, multiple data acquisition connectors are electrically connected to the multiple batteries, ensuring reliable connection between the batteries and the data acquisition connectors. By electrically connecting the multiple data acquisition connectors to a data acquisition structure, the data acquisition structure collects information from the multiple batteries, thereby achieving the purpose of monitoring battery performance indicators such as charge level. Attached Figure Description

[0014] To better understand this disclosure, reference may be made to the embodiments shown in the following figures. Components in the figures are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of this disclosure. Additionally, related elements or components may have different arrangements as known in the art. Furthermore, in the figures, the same reference numerals denote the same or similar components in various figures. Wherein:

[0015] Figure 1 This is a schematic diagram of the structure of a battery device according to an exemplary embodiment;

[0016] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0017] Figure 3 This is a schematic diagram of the structure of a battery cell in a battery compartment of a battery device according to an exemplary embodiment;

[0018] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0019] Figure 5 This is a flowchart illustrating a battery device assembly method according to an exemplary embodiment.

[0020] The annotations in the attached figures are explained as follows:

[0021] 1. Battery housing; 2. Battery cells; 3. Low-voltage signal acquisition components; 4. Conductive components;

[0022] 11. Base plate; 12. Frame; 13. Battery compartment;

[0023] 21. Battery; 211. First side; 212. Second side; 213. Terminal post;

[0024] 31. Acquisition structure; 32. Acquisition connection piece; 33. Conductive connector; 34. Output terminal. Detailed Implementation

[0025] The technical solutions in the exemplary embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of this disclosure.

[0026] In the description of this disclosure, unless otherwise expressly specified and limited, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “multiple” refers to two or more; and the term “and / or” includes any and all combinations of one or more associated listed items. In particular, references to “the / described” object or “a” object are also intended to indicate one of a possible plurality of such objects.

[0027] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be 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 this disclosure according to the specific circumstances.

[0028] Furthermore, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this disclosure are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this disclosure. It should also be understood that, in the context of a reference to an element or feature being connected "upper," "lower," "inner," or "outer," it can be directly connected to the other element, or indirectly connected through an intermediate element.

[0029] This embodiment also provides a battery device, which is assembled using a battery device assembly method, such as... Figures 1-3 As shown, the battery device includes multiple batteries 21, a low-voltage signal acquisition component 3, and a frame 12. The multiple batteries 21 are stacked along a first direction. The low-voltage signal acquisition component 3 includes an acquisition structure 31 and multiple acquisition connecting pieces 32. One end of each acquisition connecting piece 32 is electrically connected to one of the batteries 21, and the other end of each acquisition connecting piece 32 is electrically connected to the acquisition structure 31. The frame 12 surrounds the multiple batteries 21, and the connection position of at least one acquisition connecting piece 32 and battery 21 is lower than the top surface of the frame 12 along the first direction.

[0030] By stacking multiple batteries 21 along the first direction, the energy density of the battery device is increased. By configuring the batteries 21 and the data acquisition connection pieces 32 as separate structures, one end of each data acquisition connection piece 32 is electrically connected to one of the batteries 21, ensuring reliable connection between the batteries 21 and the data acquisition connection pieces 32. The other ends of each data acquisition connection piece 32 are electrically connected to the data acquisition structure 31, allowing the data acquisition structure 31 to collect information from the multiple batteries 21, thereby monitoring performance indicators such as the battery capacity. A frame 12 surrounds the multiple batteries 21, providing side protection for the batteries 21. Since the connection position of at least one data acquisition connection piece 32 to the battery 21 is lower than the top surface of the frame 12 along the first direction, the frame 12 protects the connection position.

[0031] It should be noted that the acquisition connection piece 32 can be directly electrically connected to the terminal 213 of the battery 21, or it can be indirectly electrically connected to the terminal 213 of the battery 21, for example, the acquisition connection piece 32 can be electrically connected to the terminal 213 of the battery 21 through a conductive busbar.

[0032] It should be noted that the acquisition structure 31 can be a flexible wire harness or a PCB board.

[0033] A battery, comprising a cell and an electrolyte, is the smallest unit capable of electrochemical reactions such as charging and discharging. A cell is a unit formed by winding or laminating stacked portions, including a first electrode, a separator, and a second electrode. When the first electrode is the positive electrode, the second electrode is the negative electrode. The polarities of the first and second electrodes can be interchanged.

[0034] In one embodiment, the battery 21 is a stacked battery, which is not only convenient to assemble, but also allows for the processing of batteries 21 with a longer length.

[0035] Specifically, the battery cell is a laminated battery cell, which has a first electrode layered on top of each other, a second electrode layer with the opposite electrical charge to the first electrode layer, and a separator layer disposed between the first electrode layer and the second electrode layer, so that multiple pairs of first electrode layers and second electrode layers are stacked to form a laminated battery cell.

[0036] Optionally, the battery 21 can be a wound battery, which involves winding a first electrode, a second electrode with the opposite electrical charge to the first electrode, and a separator disposed between the first electrode and the second electrode to obtain a wound battery cell.

[0037] It should be noted that the battery 21 provided in this embodiment is specifically a square battery. The height direction of the battery 21, that is, the stacking direction of multiple batteries 21, is defined as the first direction, the length direction of the battery 21 is the second direction, and the width direction of the battery 21 is the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The first direction, the second direction, and the third direction only represent spatial directions and have no substantial meaning.

[0038] In one embodiment, the battery 21 has two opposing first sides 211 and four end-to-end second sides 212, with the four second sides 212 disposed between the two first sides 211. The surface area of ​​the first sides 211 is larger than the surface area of ​​the second sides 212. The acquisition structure 31 is disposed on the first side 211 of the battery 21 located at the uppermost end along the first direction to form a battery cell 2, and adjacent battery cells 2 are connected by the acquisition structure 31.

[0039] The battery 21 has a shape similar to a cuboid structure. It consists of two opposing first side surfaces 211 and four end-to-end second side surfaces 212. The four second side surfaces 212 are positioned between the two first side surfaces 211. The two first side surfaces 211 and the four second side surfaces 212 form six surfaces of the cuboid structure. The surface area of ​​the first side surface 211 is larger than that of the second side surface 212. The first side surface 211 has a relatively large surface area and can also be referred to as a large surface.

[0040] The acquisition structure 31 is set on the first side 211 of the battery 21 located at the top along the first direction. The first side 211 of the battery 21 provides a placement position for the acquisition structure 31, ensuring the support effect for the acquisition structure 31. Since the surface area of ​​the first side 211 is relatively large, the first side 211 provides a large arrangement space for the acquisition structure 31. Moreover, the acquisition structure 31 is set on the top battery 21, which is equivalent to the acquisition structure 31 adopting a top-out method. Even after the battery 21 is put into the box, the wiring of the acquisition structure 31 can be conveniently arranged.

[0041] Specifically, two terminals 213 are respectively provided at both ends of the battery 21, making the distance between the two terminals 213 relatively large. The terminals 213 adopt a two-end lead-out structure to avoid interference during installation. The data acquisition structure 31 is electrically connected to the terminals 213. The data acquisition structure 31 can collect various performance indicators of the battery 21 through the terminals 213 to characterize the actual usage status of the battery 21.

[0042] In one embodiment, such as Figures 3-4 As shown, the two pole posts 213 are disposed on opposite sides of the first side 211, or the two pole posts 213 are disposed on opposite sides of the second side 212.

[0043] The electrode 213 is disposed on the first side surface 211, meaning it is located on a large surface area. This provides a large mounting area for the electrode 213, offering ample space for installation between the electrode 213 and other conductive components, thus facilitating its installation. Furthermore, the two electrodes 213 are positioned on opposite sides of the first side surface 211, ensuring a large distance between them and preventing interference during installation.

[0044] The pole post 213 is set on the second side 212, that is, the pole post 213 is set on the narrow surface with a relatively small surface area. In this embodiment, it is not limited whether the pole post 213 is set on the large surface or the narrow surface. As long as the pole post 213 can be led out at both ends, it is within the protection scope of this embodiment.

[0045] It should be noted that the projections of the two pole posts 213 onto the reference plane can coincide, or they can be non-coincident. The reference plane is parallel to the plane containing the first and third directions. In other words, the two pole posts 213 can be positioned opposite each other or offset from each other. The position of the two pole posts 213 is not limited and can be adjusted according to the actual production situation.

[0046] In one embodiment, two acquisition structures 31 are respectively provided on opposite sides of the first side 211, and the two terminals 213 of the same battery 21 are respectively connected to the two acquisition structures 31.

[0047] When multiple batteries 21 are connected in series or in parallel, the two terminals 213 of the same battery 21 are respectively connected to two acquisition structures 31, so that the two acquisition structures 31 can collect data from both sides of the battery 21 respectively, with good independence and avoiding mutual influence and interference.

[0048] In one embodiment, such as Figures 3-4 As shown, the low-voltage signal acquisition component 3 also includes a conductive connector 33, and multiple acquisition connectors 32 are electrically connected to the acquisition structure 31 through the conductive connector 33.

[0049] Since multiple batteries 21 are connected to multiple data acquisition connectors 32, if the data acquisition connectors 32 are directly connected to the data acquisition structure 31, then after the batteries 21 are placed in the battery housing 1, the multiple data acquisition connectors 32 need to be connected to the data acquisition structure 31 sequentially. However, the space between the battery housing 1 and the batteries 21 is relatively small, making it difficult to connect the multiple data acquisition connectors 32 to the data acquisition structure 31. By electrically connecting the multiple data acquisition connectors 32 to the conductive connectors 33, the conductive connectors 33 integrate the multiple data acquisition connectors 32, realizing the function of summarizing the multiple data acquisition connectors 32. The data acquisition connectors 32 are electrically connected to the data acquisition structure 31 through the conductive connectors 33, which act as intermediate connections. The data acquisition structure 31 only needs to be connected to the conductive connectors 33, which serves as the main structure, to achieve the connection with the multiple data acquisition connectors 32, simplifying the process and reducing production costs.

[0050] In addition, since there is a certain distance between the pole 213 and the acquisition structure 31, the acquisition connecting piece 32 is located between the pole 213 and the acquisition structure 31. The acquisition connecting piece 32 plays the role of intermediate connection to electrically connect the acquisition structure 31 and the pole 213, ensuring the reliability of the connection between the pole 213 and the acquisition structure 31.

[0051] In one embodiment, the terminals 213 of two adjacent batteries 21 are connected by a data acquisition connector 32, and the data acquisition structure 31 is electrically connected to the data acquisition connector 32. Specifically, the data acquisition connector 32 is a nickel sheet.

[0052] After multiple batteries 21 are stacked along the first direction, the electrical connection of the terminals 213 in two adjacent batteries 21 is achieved by the acquisition connection piece 32, thus realizing the electrical connection between multiple batteries 21. The acquisition structure 31 is electrically connected to the acquisition connection piece 32, thus completing the process of the acquisition structure 31 acquiring the signal of the battery 21 through the acquisition connection piece 32. The acquisition connection piece 32 is used to realize the electrical connection between the terminals 213 of multiple batteries 21, and is also used to connect to the acquisition structure 31. The acquisition connection piece 32 has multiple uses and strong functionality.

[0053] It should be noted that if the electrode post 213 is located on the edge of the second side 212 or the first side 211, the acquisition connecting piece 32 is a strip structure, the acquisition connecting piece 32 extends along the first direction, and the acquisition connecting piece 32 can be sequentially connected to multiple electrode posts 213 of batteries 21 stacked along the first direction.

[0054] Since the terminal post 213 of the battery 21 may not protrude from the second side 212, but is set on the edge of the first side 211, which is equivalent to the terminal post 213 being recessed between two adjacent batteries 21, if the acquisition connecting piece 32 is used to connect the terminal post 213 and the acquisition structure 31 at the same time, the positioning accuracy of the two ends of the acquisition connecting piece 32 is relatively high, and the length of the acquisition connecting piece 32 along the first direction is relatively long, which makes it easy to break.

[0055] Therefore, in this embodiment, the acquisition connecting piece 32 and the conductive connector 33 together form the acquisition end. The acquisition connecting piece 32 and the conductive connector 33 are separate structures. The size of the acquisition connecting piece 32 and the conductive connector 33 is relatively small, which facilitates the control of errors during production and processing. Moreover, the acquisition connecting piece 32 and the conductive connector 33 can be installed sequentially to avoid breakage due to long length. The acquisition connecting piece 32 is electrically connected to the terminal 213 of the battery 21, and the acquisition connecting piece 32 realizes the extraction of current from the terminal 213 of the battery 21. The acquisition connecting piece 32 is electrically connected to the flexible branch through the conductive connector 33, which serves as a transition between the acquisition connecting piece 32 and the acquisition structure 31.

[0056] In one embodiment, there are multiple acquisition connection pieces 32, one end of each acquisition connection piece 32 is electrically connected to the terminal post 213 of multiple batteries 21, and the other end is electrically connected to the conductive connector 33.

[0057] The number of acquisition connection pieces 32 corresponds to the number of batteries 21. One end of each acquisition connection piece 32 is electrically connected to one terminal 213 of each battery 21, ensuring the independence of information acquisition by the terminals 213 of the multiple batteries 21 and avoiding signal interference. Each terminal 213 of each battery 21 and its corresponding acquisition connection piece 32 form a branch. The other end of each acquisition connection piece 32 is electrically connected to a conductive connector 33, which effectively integrates the multiple branches and serves to aggregate the electrical signals.

[0058] In one embodiment, the conductive connector 33 is connected to the acquisition structure 31 via a fixing structure. This fixing structure secures the conductive connector 33 and the acquisition structure 31, ensuring the reliability of the connection between them.

[0059] It is understood that the fixing structure can be any of the plug-in structure, interference fit structure, and welded structure, which represent different fixing methods. This embodiment does not limit the specific form of the fixing structure and can be adjusted according to actual production needs.

[0060] It is understandable that an insulating layer is wrapped around the outside of the fixed structure. The insulating layer serves to isolate the conductive connector 33 from the acquisition structure 31, ensuring the insulation effect.

[0061] In one embodiment, the conductive connectors 33 corresponding to the multiple acquisition connection pieces 32 are integrally formed, or the conductive connectors 33 corresponding to the multiple acquisition connection pieces 32 are separate structures.

[0062] In one embodiment, the conductive connectors 33 corresponding to the multiple acquisition connection pieces 32 are integrally formed, or the conductive connectors 33 corresponding to the multiple acquisition connection pieces 32 are separate structures.

[0063] If the conductive connectors 33 corresponding to the multiple acquisition connection pieces 32 are of a separate structure, then there are also multiple conductive connectors 33. One end of each acquisition connection piece 32 is electrically connected to a terminal 213 of the battery 21, and the other end of each acquisition connection piece 32 is electrically connected to a conductive connector 33. In this case, the end of the conductive connector 33 not connected to the acquisition connection piece 32 is electrically connected to the acquisition structure 31, which is equivalent to achieving signal aggregation at the location of the acquisition structure 31.

[0064] If the conductive connectors 33 corresponding to the multiple acquisition connectors 32 are integrally formed, then the number of conductive connectors 33 is one. One end of each acquisition connector 32 is electrically connected to one terminal 213 of the battery 21, and the other end of each acquisition connector 32 is electrically connected to the same conductive connector 33. That is, multiple acquisition connectors 32 share the same conductive connector 33, which is equivalent to realizing signal aggregation at the position of the conductive connector 33.

[0065] In one embodiment, the conductive connector 33 is any one of PCB, FPC, and FFC.

[0066] If the conductive connector 33 is a structure similar to a single PCB, the PCB can also be called a printed circuit board or printed circuit board. The PCB can serve as a support for the acquisition connector 32 and as a carrier for the electrical connection between the acquisition connector 32 and the acquisition structure 31.

[0067] If the conductive connector 33 is an FPC or FFC, it represents a structure that merges multiple branches into a single main circuit. Specifically, the FPC or FFC can be a conductor, which includes an outer sheath and a cable. The cable is housed within the outer sheath, which serves to protect the cable. Initially, the cable and the outer sheath are assumed to be of equal length. When electrical connection is required, the two ends of the cable are the main end and the branch end, respectively. The main end of the cable is directly electrically connected to the acquisition structure 31. The outer sheath located outside the branch end of the cable is stripped, leaving the branch end exposed relative to the external environment. At this time, the various branches of the branch end of the cable are dispersed, facilitating the corresponding electrical connection of each branch to the terminal 213 of each battery 21.

[0068] In one embodiment, the low-voltage signal acquisition component 3 further includes an output terminal 34, which is electrically connected to the acquisition structure 31. The output terminal 34 serves as a lead-out terminal of the acquisition structure 31 and can be connected to other electrical devices used for monitoring parameters to transmit signals from the battery 21.

[0069] It is understandable that the output terminal 34 can be located directly opposite one of the battery cells 2, or the output terminal 34 can be located outside the battery cell 2. That is, for a battery compartment 13, the output terminal 34 is located at the end of the battery compartment 13 along a third direction to avoid interference from the battery cell 2.

[0070] In one embodiment, the battery device further includes a battery housing 1, which includes a base plate 11, and a plurality of batteries 21 are stacked on the base plate 11 along a first direction; wherein the first direction is perpendicular to the base plate 11.

[0071] Multiple batteries 21 are stacked on the base plate 11 along the first direction. The base plate 11 serves to support the multiple batteries 21, providing good support. The multiple batteries 21 are stacked vertically on the base plate 11 along the first direction, making use of the height space and saving floor space.

[0072] In one embodiment, the battery device is a battery module, which includes a plurality of batteries 21. The battery module may also include an end plate and a side plate for fixing the plurality of batteries 21. A buffer pad may be provided between adjacent batteries 21, and a buffer pad may be provided between the end plate and the batteries 21.

[0073] In one embodiment, the battery device is a battery pack. By housing the battery 21 inside the battery housing 1, the battery housing 1 provides protection for the battery 21.

[0074] It should be noted that when there are multiple batteries 21, the multiple batteries 21 can be arranged in a group along the stacking direction of the batteries 21 and then placed inside the battery box 1. The multiple batteries 21 can be fixed by end plates and side plates. When the multiple batteries 21 are directly placed inside the battery box 1, that is, it is not necessary to group the multiple batteries 21, in this case, the end plates and side plates can be removed.

[0075] One embodiment of the present invention provides a battery device assembly method, please refer to... Figure 5 As shown, the battery assembly method includes the following steps: stacking multiple batteries 21 along a first direction; electrically connecting multiple acquisition connecting pieces 32 to the multiple batteries 21; after placing the multiple batteries 21 and the multiple acquisition connecting pieces 32 together in the battery box 1, electrically connecting the multiple acquisition connecting pieces 32 to the acquisition structure 31 respectively, so that the acquisition structure 31 acquires the information of the multiple batteries 21.

[0076] The battery assembly method provided in this embodiment increases the energy density of the battery device by stacking multiple batteries 21 along a first direction. If the batteries 21 are placed in the battery housing 1 and then welded to the data acquisition connecting pieces 32, the space between the batteries 21 and the battery housing 1 is relatively narrow, insufficient for welding tools such as welding torches, leading to welding difficulties and affecting the reliability of the connection between the batteries 21 and the data acquisition connecting pieces 32. By electrically connecting multiple data acquisition connecting pieces 32 to the multiple batteries 21 before placing them in the battery housing 1, the problem of insufficient space for welding torches between the batteries 21 and the battery housing 1 is solved, improving the reliability of the connection between the batteries 21 and the data acquisition connecting pieces 32. After placing multiple batteries 21 and multiple data acquisition connectors 32 together inside the battery housing 1, the multiple data acquisition connectors 32 are electrically connected to the data acquisition structure 31. Since the data acquisition connectors 32 are already connected to the batteries 21 before being placed into the battery housing 1, after the batteries 21 are placed into the battery housing 1, only the data acquisition connectors 32 need to be connected to the data acquisition structure 31, facilitating the overall process operation after the batteries 21 are placed into the battery housing 1. By electrically connecting the multiple data acquisition connectors 32 to the data acquisition structure 31, the data acquisition structure 31 collects information from the multiple batteries 21, thereby achieving the purpose of monitoring the battery's power level and other performance indicators.

[0077] It is understandable that at least one of the connection positions of the acquisition connector 32 and the battery 21 is lower than the top surface of the frame 12 along the first direction. If the acquisition connector 32 and the battery 21 are not electrically connected before being placed into the battery box 1, but are electrically connected to the acquisition connector 32 after the battery 21 is placed into the battery box 1, then the frame 12 will interfere with the connection position of the acquisition connector 32 and the battery 21.

[0078] In one embodiment, the battery assembly method further includes: before electrically connecting the plurality of acquisition connection pieces 32 to the plurality of batteries 21, electrically connecting the plurality of acquisition connection pieces 32 to the conductive connector 33, so that the acquisition connection pieces 32 are electrically connected to the acquisition structure 31 through the conductive connector 33.

[0079] Since multiple batteries 21 are connected to multiple data acquisition connectors 32, if the data acquisition connectors 32 are directly connected to the data acquisition structure 31, then after the batteries 21 are placed in the battery housing 1, the multiple data acquisition connectors 32 need to be connected to the data acquisition structure 31 sequentially. However, the space between the battery housing 1 and the batteries 21 is relatively small, making it difficult to connect the multiple data acquisition connectors 32 to the data acquisition structure 31. By electrically connecting the multiple data acquisition connectors 32 to the conductive connectors 33, the conductive connectors 33 integrate the multiple data acquisition connectors 32, realizing the function of summarizing the multiple data acquisition connectors 32. The data acquisition connectors 32 are electrically connected to the data acquisition structure 31 through the conductive connectors 33, which act as intermediate connections. The data acquisition structure 31 only needs to be connected to the conductive connectors 33, which serves as the main structure, to achieve the connection with the multiple data acquisition connectors 32, simplifying the process and reducing production costs. Meanwhile, since the connection between the multiple acquisition connecting pieces 32 and the conductive connectors 33 is made before the battery 21 is placed into the battery box 1, the connection between the acquisition connecting pieces 32 and the conductive connectors 33 is not limited by the space of the battery box 1, making the operation relatively easy, and the connection between the acquisition connecting pieces 32 and the conductive connectors 33 has good reliability.

[0080] In one embodiment, the conductive connector 33 extends along a first direction, and the acquisition structure 31 is disposed on the top of the battery 21 along the first direction.

[0081] By setting the conductive connector 33 to extend along the first direction, the conductive connector 33 is essentially positioned on the side of the battery 21. The acquisition structure 31 is positioned at the top of the battery 21 along the first direction, essentially acting as a top-mounted structure. This allows the conductive connector 33 to be directly led from the side of the battery 21 to its top surface, facilitating the connection between the conductive connector 33 and the acquisition structure 31. Furthermore, if the acquisition structure 31 were positioned at the bottom or middle of the battery 21 along the first direction, it might pass through the intermediate beam of the battery housing 1 during installation. This would require pre-drilling through holes in the intermediate beam for the acquisition structure 31, increasing production costs and reducing the structural strength of the intermediate beam. By positioning the acquisition structure 31 at the top of the battery 21 along the first direction, its installation is not affected by the intermediate beam inside the battery housing 1, eliminating the need to modify the intermediate beam. This approach reduces production costs while ensuring the structural strength of the intermediate beam.

[0082] In one embodiment, the conductive connector 33 is connected to the acquisition structure 31 via a fixing structure. This fixing structure secures the conductive connector 33 and the acquisition structure 31, ensuring the reliability of the connection between them.

[0083] It is understood that the fixing structure can be any of the plug-in structure, interference fit structure, and welded structure, which represent different fixing methods. This embodiment does not limit the specific form of the fixing structure and can be adjusted according to actual production needs.

[0084] In one embodiment, after the plurality of acquisition connection pieces 32 are electrically connected to the acquisition structure 31, the output terminal 34 is electrically connected to the acquisition structure 31; or, before the plurality of acquisition connection pieces 32 are electrically connected to the acquisition structure 31, the output terminal 34 is electrically connected to the acquisition structure 31.

[0085] Specifically, after multiple acquisition connectors 32 are electrically connected to the acquisition structure 31, the free end and output end 34 of the acquisition structure 31 can be soldered. Since the acquisition structure 31 is located at the top of the battery 21 along the first direction, it does not affect the connection between the acquisition structure 31 and the output end 34.

[0086] Specifically, before the multiple acquisition connectors 32 are electrically connected to the acquisition structure 31, the output terminal 34 can be electrically connected to the acquisition structure 31. When the acquisition structure 31 is connected to the acquisition connectors 32, it is equivalent to the acquisition structure 31 having its own output terminal 34, reducing the connection difficulty between the acquisition structure 31 and the output terminal 34.

[0087] In one embodiment, multiple batteries 21 are stacked along a first direction to form a battery unit 2. After the multiple battery units 2 are placed in the battery housing 1, the acquisition structure 31 is electrically connected to the multiple acquisition connection pieces 32 corresponding to the multiple battery units 2.

[0088] If there is only one battery cell 2, the acquisition structure 31 serves as the lead-out terminal of the battery cell 2, used to acquire information from each battery cell 21 within the entire battery cell 2. If there are multiple battery cells 2 arranged according to a certain pattern, the acquisition structure 31 can be electrically connected to multiple acquisition connection pieces 32 corresponding to the multiple battery cells 2. This allows multiple battery cells 2 to be connected using a single acquisition structure 31, effectively making it equivalent to multiple battery cells 2 sharing the same acquisition structure 31. The acquisition structure 31 is an integral structure, saving the time required for interconnecting multiple separate acquisition structures 31, thus reducing the assembly cost of the battery device.

[0089] If there are multiple battery cells 2, adjacent battery cells 2 are connected by a data acquisition structure 31. The data acquisition structure 31 acts as a bridging link between adjacent battery cells 2, allowing the data acquisition structure 31 to be electrically connected to multiple battery cells 2 and to acquire signals from the batteries 21 of multiple battery cells 2. The data acquisition structure 31 has strong functionality.

[0090] It is understandable that if multiple battery cells 2 are arranged sequentially along a third direction, the acquisition structure 31 extends along the third direction; if multiple battery cells 2 are arranged sequentially along a second direction, the acquisition structure 31 extends along the second direction.

[0091] It is understood that the acquisition structure 31 can be a split structure, with multiple acquisition structures 31 corresponding to multiple battery cells 2, and adjacent acquisition structures 31 being electrically connected to each other; the acquisition structure 31 can also be a one-piece structure, with one acquisition structure 31 corresponding to multiple battery cells 2, that is, multiple battery cells 2 share the same acquisition structure 31.

[0092] It should be noted that the battery housing 1 of the battery device is equipped with a frame 12 and a partition beam (such as...). Figure 1 and Figure 2 As shown, the frame 12 is set on the base plate 11 and surrounds the battery unit 2, serving as a side protection. The partition beam is set on the base plate 11 and inside the frame 12. The partition beam divides the cavity of the battery box 1 into multiple battery storage compartments 13. Each battery storage compartment 13 is used to accommodate multiple battery units 2. The acquisition structure 31 corresponding to each battery storage compartment 13 is an integrally formed structure, while the acquisition structures 31 corresponding to different battery storage compartments 13 are split structures.

[0093] It is understandable that the width of the conductive connector 33 corresponding to different battery cells 2 along the third direction may be the same or different. If the number of conductive connectors 33 that are electrically connected to the acquisition connector 32 is relatively small, then the width of the conductive connector 33 along the third direction will be relatively small; if the number of conductive connectors 33 that are electrically connected to the acquisition connector 32 is relatively large, then the width of the conductive connector 33 along the third direction will be relatively large.

[0094] It is understandable that, for each battery cell 2, after the multiple battery 21 connecting pieces are respectively connected to the sides of the multiple batteries 21 along the first direction, the data acquisition connector is used to transfer to the top of the battery cell 2, and then the multiple battery cells 2 are connected by the data acquisition structure 31 on the top of the battery cell 2 to realize the function of series data acquisition.

[0095] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and exemplary embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

[0096] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of this disclosure is limited only by the appended claims.

Claims

1. A battery assembly method, characterized in that, Includes the following steps: Multiple batteries (21) are stacked along a first direction to form a battery cell (2), wherein there are multiple battery cells (2); Multiple acquisition connection pieces (32) are electrically connected to multiple batteries (21) respectively; After placing multiple batteries (21) and multiple acquisition connection pieces (32) together in the battery (21) box, the multiple acquisition connection pieces (32) are electrically connected to the acquisition structure (31) respectively, so that the acquisition structure (31) acquires information from the multiple batteries (21); In this configuration, at least one of the acquisition connecting pieces (32) and the battery (21) are connected at a position lower than the top surface of the frame along the first direction. The frame surrounds the plurality of batteries (21). The first direction is perpendicular to the base plate (11). The plurality of batteries (21) are stacked on the base plate (11) along the first direction. Each battery (21) has two opposing first sides (211) and four end-to-end second sides (212). The four second sides (212) are disposed between the two first sides (211). The surface area of ​​the first side (211) is greater than the surface area of ​​the second side (212). The first direction is perpendicular to the first side (211). The acquisition structure (31) is electrically connected to the plurality of acquisition connecting pieces (32) corresponding to the plurality of battery units (2). The acquisition structure (31) is an integrally formed structure. The plurality of battery units (2) share the same acquisition structure (31).

2. The battery assembly method according to claim 1, characterized in that, Before connecting the multiple acquisition connectors (32) to the multiple batteries (21), the multiple acquisition connectors (32) are electrically connected to the conductive connectors (33), so that the acquisition connectors (32) are electrically connected to the acquisition structure (31) through the conductive connectors (33).

3. The battery assembly method according to claim 2, characterized in that, The conductive connector (33) extends along the first direction, and the acquisition structure (31) is disposed on the top of the battery (21) along the first direction.

4. The battery assembly method according to claim 3, characterized in that, The conductive connector (33) is connected to the acquisition structure (31) through a fixing structure.

5. The battery assembly method according to claim 1, characterized in that, After electrically connecting multiple acquisition connectors (32) to the acquisition structure (31) respectively, electrically connect the output terminal (34) to the acquisition structure (31); or, Before the multiple acquisition connectors (32) are electrically connected to the acquisition structure (31), the output terminal (34) is electrically connected to the acquisition structure (31).

6. A battery device, characterized in that, The battery device is assembled using the assembly method according to any one of claims 1-5, wherein the battery device comprises: Multiple batteries (21) are stacked along a first direction; The low-voltage signal acquisition component (3) includes an acquisition structure (31) and multiple acquisition connecting pieces (32). One end of each acquisition connecting piece (32) is electrically connected to a plurality of batteries (21), and the other end of each acquisition connecting piece (32) is electrically connected to the acquisition structure (31). frame.

7. The battery device according to claim 6, characterized in that, The low-voltage signal acquisition component (3) also includes a conductive connector (33), and a plurality of acquisition connectors (32) are electrically connected to the acquisition structure (31) through the conductive connector (33).

8. The battery device according to claim 7, characterized in that, The conductive connector (33) is connected to the acquisition structure (31) through a fixing structure.

9. The battery device according to claim 8, characterized in that, The fixing structure can be any one of the following: plug-in structure, interference fit structure, or welding structure.

10. The battery device according to claim 7, characterized in that, The conductive connectors (33) corresponding to the multiple acquisition connection pieces (32) are integrally formed, or the conductive connectors (33) corresponding to the multiple acquisition connection pieces (32) are separate structures.

11. The battery device according to claim 6, characterized in that, The acquisition structure (31) is disposed on the first side (211) of the battery (21) located at the uppermost end along the first direction, and stacked along the first direction to form a battery cell (2), and two adjacent battery cells (2) are connected through the acquisition structure (31).

12. The battery device according to any one of claims 6-11, characterized in that, The low-voltage signal acquisition component (3) also includes an output terminal (34), which is electrically connected to the acquisition structure (31).

13. The battery device according to any one of claims 6-11, characterized in that, It also includes a battery housing (1), which includes a base plate (11).

14. The battery device according to any one of claims 6-11, characterized in that, The acquisition structure (31) is a flexible wire harness or a PCB board.

15. The battery device according to claim 9, characterized in that, An insulating layer is wrapped around the outside of the fixed structure.

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