Battery pack, battery pack and vehicle

Abstract

The invention provides a battery pack, a battery pack and a vehicle. The battery pack includes: two battery blocks facing each other, each battery block including a plurality of battery cells arranged in a first direction; the circuit board is arranged between the two battery blocks, the circuit board comprises a substrate and a plurality of electric connecting pieces which penetrate through the substrate and are arranged along a first direction, and the plurality of battery units of the two battery blocks are alternately connected in series by the plurality of electric connecting pieces; wherein the plurality of battery units of the two battery blocks are opposite in a one-to-one staggered manner, and the tail end electrode of the battery unit of one battery block is opposite to the head end electrode of the battery unit of the other battery block and is connected with the head end electrode of the battery unit of the other battery block through an electric connecting piece. The arrangement of circuit boards and bus bars can be reduced, so that the structure of the battery pack can be simplified, the manufacturing efficiency of the battery pack is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a battery pack, a battery package and a vehicle. Background Art

[0002] With the development of the automobile industry, new energy vehicles, including but not limited to pure electric vehicles (BEV), hybrid electric vehicles (HEV) and plug-in hybrid electric vehicles (PHEV), are becoming more and more popular. In new energy vehicles, power is provided by a battery pack.

[0003] In some solutions of the prior art, a vehicle battery pack includes a plurality of battery modules disposed in a battery pack housing and electrically connected to each other through wires, and each battery module includes a plurality of battery cells disposed in a stack and electrically connected to each other through circuit boards and / or bus bars. In order to provide sufficient power, the battery pack uses a large number of battery cells, and accordingly requires a large number of circuit boards and / or bus bars, which poses challenges to the production cost control and / or manufacturing efficiency improvement of the battery pack. Summary of the invention

[0004] This disclosure summarizes various aspects of the embodiments and should not be used to limit the claims. Other embodiments are conceivable based on the technology described herein, which will be apparent to those of ordinary skill in the art after studying the following drawings and detailed descriptions, and these embodiments are intended to be included within the scope of this application.

[0005] The inventors of the present application recognize that there is a need for an improved battery pack solution that can reduce the use of circuit boards and / or bus bars without reducing battery capacity, thereby simplifying the structure of the battery pack, improving its manufacturing efficiency and reducing production costs.

[0006] According to one aspect of the present invention, there is provided a battery pack, comprising:

[0007] two battery blocks facing each other, each battery block comprising a plurality of battery cells arranged along a first direction; and

[0008] A circuit board disposed between the two battery blocks, the circuit board comprising a substrate and a plurality of electrical connectors penetrating the substrate and arranged along a first direction, the plurality of electrical connectors alternately connecting the plurality of battery cells of the two battery blocks in series;

[0009] The multiple battery cells of the two battery blocks are staggered and opposite to each other, and the tail end electrodes of the battery cells of one battery block are opposite to the head end electrodes of the battery cells of the other battery block and are connected through electrical connectors.

[0010] According to an embodiment of the present invention, the electrical connector is a connecting sleeve, and the head end electrode and the tail end electrode are respectively inserted into the connecting sleeve from both ends.

[0011] According to an embodiment of the present invention, the distance between the head electrode and the tail electrode of each battery cell and the staggered distance between the multiple battery cells of the two battery blocks are both half of the size of the battery cell along the first direction.

[0012] According to one embodiment of the present invention, the battery unit is placed flat.

[0013] According to one embodiment of the present invention, each battery block includes two layers of battery cells stacked along a second direction, and each layer of battery cells includes multiple battery cells; the circuit board has two rows of electrical connectors arranged along the second direction, and each row of electrical connectors includes multiple electrical connectors; the first layer of battery cells of the two battery blocks are alternately connected in series through the first row of electrical connectors to form a first current path; the second layer of battery cells of the two battery blocks are alternately connected in series through the second row of electrical connectors to form a second current path; the circuit board is also provided with a bus bar connecting the first current path and the second current path in series.

[0014] According to one embodiment of the present invention, the battery pack has a first end and a second end in a first direction, the first current path flows from the first end to the second end, the second current path flows from the second end to the first end, and the bus bar connects the first current path and the second current path at the second end.

[0015] According to an embodiment of the present invention, the length of the bus bar is the distance between two rows of electrical connectors in the second direction.

[0016] According to one embodiment of the present invention, each battery block includes a U-shaped housing for accommodating a plurality of battery cells, and openings of the U-shaped housings of two battery blocks face each other.

[0017] According to one embodiment of the present invention, the U-shaped housing has a hollow structure.

[0018] According to one embodiment of the present invention, the ends of the U-shaped shells of the two battery blocks are flush, a gap is formed at one end of the U-shaped shell, and the battery pack further includes a battery control module disposed in the gap and electrically connected to the circuit board.

[0019] According to an embodiment of the present invention, each battery block further includes a plurality of heat conduction channels arranged along the first direction, each heat conduction channel extending along the second direction and communicating with the vents of two stacked battery cells.

[0020] According to another aspect of the present invention, there is provided a battery pack, comprising:

[0021] Two battery blocks facing each other, each battery block comprising two layers of battery cells stacked along a first direction, each layer comprising a plurality of battery cells arranged along a second direction; and

[0022] A circuit board disposed between two battery blocks, the circuit board comprising: a substrate; two rows of electrical connectors penetrating the substrate and arranged along a first direction, each row comprising a plurality of electrical connectors arranged along a second direction; and a bus bar connecting the same end of the two rows of electrical connectors;

[0023] The first row of electrical connectors connects the first layer of battery cells of the two battery blocks alternately in series, and the second row of electrical connectors connects the second layer of battery cells of the two battery blocks alternately in series; the electrode arrangement order of the same layer of battery cells of the two battery blocks is the same, and the electrode arrangement order of the two layers of battery cells of the same battery block is opposite.

[0024] According to one embodiment of the present invention, multiple battery cells in the same layer of two battery blocks are staggered and opposite to each other, and the tail electrodes of the battery cells of one battery block are opposite to the head electrodes of the battery cells of the other battery block and are connected through electrical connectors.

[0025] According to an embodiment of the present invention, the electrical connector is a connecting sleeve, and the head end electrode and the tail end electrode are respectively inserted into the connecting sleeve from both ends.

[0026] According to an embodiment of the present invention, the distance between the head electrode and the tail electrode of each battery cell and the staggered distance between the multiple battery cells of the two battery blocks are both half of the size of the battery cell along the second direction.

[0027] According to one embodiment of the present invention, the battery unit is placed flat.

[0028] According to one embodiment of the present invention, each battery block includes a U-shaped shell for accommodating a plurality of battery cells, and the openings of the U-shaped shells of the two battery blocks are opposite to each other; the ends of the U-shaped shells of the two battery blocks are flush, and a void portion is formed at one end of the U-shaped shell, and the battery pack also includes a battery control module arranged in the void portion and electrically connected to the circuit board.

[0029] According to an embodiment of the present invention, each battery block further includes a plurality of heat conduction channels arranged along the second direction, each heat conduction channel extending along the first direction and communicating with the vents of two stacked battery cells.

[0030] According to another aspect of the present invention, a battery pack is provided, comprising: a battery pack housing; and one or more battery packs as described in the above embodiments disposed in the battery pack housing.

[0031] According to another aspect of the present invention, a vehicle is provided, comprising: a battery pack as described in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] For a better understanding of the present invention, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily drawn to scale, and related elements may be omitted, or in some cases the proportions may have been exaggerated in order to emphasize and clearly illustrate the novel features described herein. In addition, as is known in the art, the system components may be arranged differently. Moreover, in the drawings, like reference numerals represent corresponding parts throughout the several views.

[0033] Figure 1 A general schematic diagram of a battery pack according to an embodiment of the present invention is shown;

[0034] Figure 2 A schematic diagram showing a staggered arrangement of battery cells of two battery blocks according to an embodiment of the present invention;

[0035] Figure 3 A schematic diagram showing the arrangement of two battery blocks and a circuit board according to an embodiment of the present invention is shown;

[0036] Figure 4 A schematic diagram showing a current path of a battery pack according to an embodiment of the present invention;

[0037] Figure 5 A partial schematic diagram showing a first end of a battery pack according to an embodiment of the present invention;

[0038] Figure 6 A partial schematic diagram showing a second end of a battery pack according to an embodiment of the present invention;

[0039] Figure 7 Another partial schematic diagram showing a second end of a battery pack according to an embodiment of the present invention;

[0040] Figure 8 A schematic diagram showing a method of adjusting the length of a battery pack according to an embodiment of the present invention;

[0041] Fig. 9 A schematic diagram showing a battery unit lying flat according to an embodiment of the present invention;

[0042] Fig.10 A schematic diagram showing a heat conduction channel of a battery pack according to an embodiment of the present invention;

[0043] Fig.11 A schematic diagram of a battery pack according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0044] Embodiments of the present disclosure are described below. However, it should be understood that the disclosed embodiments are merely examples, and other embodiments may take various alternative forms. The drawings are not necessarily drawn to scale; certain features may be exaggerated or minimized to show the details of specific components. Therefore, the specific structural and functional details disclosed herein should not be interpreted as limiting, but merely as a representative basis for teaching those skilled in the art to use the present invention in various ways. As will be understood by those of ordinary skill in the art, the various features shown and described with reference to any one of the figures may be combined with the features shown in one or more other figures to produce embodiments that are not explicitly shown or described. The combination of features shown provides representative embodiments for typical applications. However, various combinations and modifications of features consistent with the teachings of the present disclosure may be desirable for certain specific applications or embodiments.

[0045] In this application document, when an element or part is referred to as "on", "engaged to", "connected to" or "coupled to" another element or part, the element or part may be directly on, engaged, connected or coupled to the other element or part, or there may be an intervening element or part. Conversely, when an element is referred to as being "directly on", "directly engaged to", "directly connected to" or "directly coupled to" another element or part, there may be no intervening element or part. Other words used to describe the relationship between elements should be interpreted in a similar manner.

[0046] The motor vehicles involved in the following embodiments may be standard gasoline-powered vehicles, hybrid electric vehicles (HEV), electric vehicles (BEV), plug-in hybrid electric vehicles (PHEV), full hybrid electric vehicles (FHEV), fuel cell vehicles and / or any other type of vehicle, and may also be buses, ships or aircraft. The vehicle includes components related to mobility, such as an engine, an electric motor, a transmission, a suspension, a drive shaft and / or wheels, etc. The vehicle may be non-autonomous, semi-autonomous (e.g., some conventional motor functions are controlled by the vehicle) or autonomous (e.g., motor functions are controlled by the vehicle without direct input from the driver).

[0047] As mentioned in the above background technology, the inventors of the present application realize that the vehicle battery pack design of the prior art requires the use of a large number of circuit boards and / or bus bars. The bus bars may be provided by the circuit boards or provided separately, and a large number of bus bars may be arranged in a complex manner to achieve a specific connection method between different battery cells. In addition, the battery pack may also be configured with a related battery status detection module. When performing status detection on a large number of battery modules, it is necessary to set up more sampling lines. The use of a large number of circuit boards, bus bars, sampling lines or other related electrical connection components leads to a complex battery pack structure, time-consuming manufacturing and high cost. Based on these problems in the prior art, the inventors of the present application provide a battery pack, a battery pack and a vehicle in one or more embodiments, which are believed to solve one or more problems in the prior art.

[0048] Figure 1 FIG. 1 shows a general schematic diagram of a battery pack 100 according to an embodiment of the present invention. Figure 2 and Figure 3 Corresponds to Figure 1 The bird's-eye view, Figure 4 For the general Figure 1 Schematic diagram of two battery blocks 10 and 10' after being flipped and unfolded. Figures 1 to 4 The present invention proposes a battery pack 100, which includes: a battery block 10 and a battery block 10' opposite to each other, and a circuit board 20 arranged between the battery blocks 10 and 10'. The battery block 10 includes a plurality of battery cells 12 (or 14, 12 is used as an example here) arranged along the X direction; similarly, the battery block 10' includes a plurality of battery cells 12' (or 14', 12' is used as an example here) arranged along the X direction. The circuit board 20 includes a substrate 22 and a plurality of electrical connectors 24 (or 26, 24 is used as an example here) penetrating the substrate 22 and arranged along the X direction, and the plurality of electrical connectors 24 alternately connect the plurality of battery cells 12 and the plurality of battery cells 12' in series. "Alternately connected in series" can mean connected in series in sequence in the manner of battery cell 12-battery cell 12'-battery cell 12-battery cell 12'...

[0049] Combination Figure 2 and Figure 3, electrodes are arranged on the surfaces of the multiple battery cells 12 and the multiple battery cells 12' facing each other, so that the electrodes can be electrically connected through the circuit board 20 between the multiple battery cells 12 and the multiple battery cells 12'. Multiple electrical connectors 24 penetrate the substrate 22, so that the electrodes of the battery cells 12 and the battery cells 12' on opposite sides of the substrate 22 can be electrically connected. The electrodes of the multiple battery cells 12 and the multiple battery cells 12' are arranged in the same order. For example, the electrode arrangement order of each battery cell 12 and each battery cell 12' is a negative-positive arrangement order along the X direction and from the first end 1 to the second end 2 of the battery pack 100. In an embodiment of the present invention, for each battery cell, it is defined that the current flows from the head end electrode to the tail end electrode. In other words, the head end electrode is the negative electrode and the tail end electrode is the positive electrode. A plurality of battery cells 12 and a plurality of battery cells 12' are staggered and opposed to each other, so that the tail electrode 12b of the battery cell 12 can be exactly opposite to the head electrode 12'a of the battery cell 12' (for example, opposite in the Y direction), and the electrical connector 24 can directly connect the opposite tail electrode 12b and the head electrode 12'a, so that after the current flows from the head electrode 12a of the battery cell 12 to the tail electrode 12b, it further flows from the tail electrode 12b to the head electrode 12'a of the battery cell 12' through the electrical connector 24, and then flows to the tail electrode 12'b of the battery cell 12'. Similarly, the tail electrode 12'b of the battery cell 12' is opposite to the head electrode 12a of the next battery cell 12 and is connected through the next electrical connector 24, so that the current flows from the tail electrode 12'b of the battery cell 12' to the head electrode 12a of the next battery cell 12 through the next electrical connector 24, and then flows to the tail electrode 12b of the next battery cell 12. By analogy, multiple battery cells 12 and multiple battery cells 12' are alternately connected in series to form Figure 4 A current path 11 is defined by a plurality of solid arrows.

[0050] As described above, in the embodiment of the present invention, two battery blocks 10 and 10' are arranged in pairs and share a circuit board 20. Compared with the prior art in which one battery block / battery array is configured with one circuit board, the use of circuit boards can be reduced, thereby saving costs and improving design efficiency. In addition, since each battery pack 100 includes two battery blocks 10 and 10', when performing relevant battery status detection, it is not necessary to set sampling lines for the two battery blocks respectively, but only a unified sampling line can be set for the battery pack 100, which can reduce the setting of sampling lines. Further, in the above-mentioned embodiment, the corresponding electrodes of the plurality of battery cells 12 and the plurality of battery cells 12' are opposite in the Y direction, and can be directly connected through the plurality of electrical connectors 24 that penetrate the substrate 22, thereby replacing the arrangement of a plurality of possibly complicated bus bars on the surface of the substrate 22, thereby reducing the setting of bus bars and saving materials. It can be known that the electrical connector 24 penetrates the substrate 22 and has a relatively small length (for example, equal to or slightly greater than the thickness of the substrate 22), which can greatly reduce the amount of material used compared to the bus bars with a longer length extending along the surface of the substrate 22. In addition, the two battery blocks 10 and 10' are arranged opposite to each other, which can also play a role in hiding the internal structure of the battery pack 100 (such as part of the structure of the battery plate and the heat conduction channel to be described below) to obtain a better visual effect. Figure 8 As shown, in an embodiment of the present invention, the length of the battery pack is flexible. New battery cells can be added to expand the length of the battery pack according to actual conditions, or the length of the battery pack can be reduced by removing battery cells, so that it can be well adapted to vehicles of different sizes.

[0051] As mentioned above, taking battery cell 12 and battery cell 12' as an example, the situation in which battery blocks 10 and 10' include a layer of battery cells is described. In this situation, a first current path 11 is formed flowing from the first end 1 to the second end 2 of the battery pack 100. The current can be further led from the second end 2 to the first end 1 by setting a corresponding bus bar, so that the main positive terminal and the main negative terminal of the battery pack 100 can be conveniently formed at the first end 1.

[0052] Continue to refer Figures 1 to 4In some embodiments, the battery block 10 includes two layers of battery cells stacked along the Z direction, the first layer of battery cells includes a plurality of battery cells 12, and the second layer of battery cells includes a plurality of battery cells 14. Similarly, the battery block 10' includes two layers of battery cells stacked along the Z direction, the first layer of battery cells includes a plurality of battery cells 12', and the second layer of battery cells includes a plurality of battery cells 14'. Accordingly, the circuit board 20 has two rows of electrical connectors arranged along the Z direction, the first row of electrical connectors includes a plurality of electrical connectors 24, and the second row of electrical connectors includes a plurality of electrical connectors 26. The first layer of battery cells of the battery block 10 and the first layer of battery cells of the battery block 10' are alternately connected in series through the first row of electrical connectors 24 to form a first current path 11; specifically, the first layer of multiple battery cells 12 and the first layer of multiple battery cells 12' are staggered and opposite to each other, and the tail electrode 12b (or 12'b) of the battery cell 12 (or 12') is opposite to the head electrode 12'a (or 12a) of the battery cell 12' (or 12) and connected through the electrical connector 24. Similarly, the second layer of battery cells of the battery block 10 and the second layer of battery cells of the battery block 10' are alternately connected in series through the second row of electrical connectors 26 to form a second current path 13; specifically, the second layer of multiple battery cells 14 and the second layer of multiple battery cells 14' are staggered and opposite to each other, and the tail electrode 14b (or 14'b) of the battery cell 14 (or 14') is opposite to the head electrode 14'a (or 14a) of the battery cell 14' (or 14) and connected through the electrical connector 26. The circuit board 20 is further provided with a bus bar 28 connecting the first current path 11 and the second current path 13 in series.

[0053] refer to Figure 4 The battery pack 100 has a first end 1 and a second end 2 in the X direction, the flow direction of the first current path 11 is from the first end 1 to the second end 2, the flow direction of the second current path 13 is from the second end 2 to the first end 1, and the bus bar 28 connects the first current path 11 and the second current path 13 at the second end 2. For the two layers of battery cells in each battery block, the electrode arrangement order is opposite, so that the flow directions of the first current path 11 and the second current path 13 are opposite. For example, according to the direction along the X direction and from the first end 1 to the second end 2 of the battery pack 100, the electrode arrangement order of the multiple battery cells 12 of the first layer of the battery block 10 is the negative electrode-positive electrode arrangement order (the overall electrode arrangement order of the battery cells of the first layer is: negative electrode-positive electrode-negative electrode-positive electrode...), on the contrary, the electrode arrangement order of the multiple battery cells 14 of the second layer of the battery block 10 is the positive electrode-negative electrode arrangement order (the overall electrode arrangement order of the battery cells of the second layer is: positive electrode-negative electrode-positive electrode-negative electrode...).

[0054] As described above, by providing two layers of battery cells and two rows of electrical connectors, on the one hand, more battery cells can be combined into a battery pack and share a circuit board, further reducing the use of the circuit board and the setting of the sampling line; on the other hand, based on the double-layer arrangement of battery cells, a first current path 11 and a second current path 13 with opposite directions can be formed, so that a bus bar 28 can be provided at the second end 2 to connect the first current path 11 and the second current path 13, so that the current flows from the first end 1 to the second end 2 and then flows back to the first end 1, so that the main positive terminal and the main negative terminal of the battery pack 100 are naturally formed at the first end 1 (such as Figure 5 As shown, the positive electrode and the negative electrode at the first end 1 constitute the main positive terminal 15 and the main negative terminal 17 respectively. At the same time, since the bus bar 28 only needs to connect the first current path 11 and the second current path 13 at the second end 2, its length can be set shorter, further reducing the use of bus bars, such as Figure 6 As shown, the bus bar 28 connects the first row of electrical connectors and the second row of electrical connectors at the second end 2 , and the length B of the bus bar 28 may be the distance between the first row of electrical connectors and the second row of electrical connectors in the Z direction.

[0055] In the embodiment of the present invention, the circuit board 20 mainly uses the substrate 22 as a base to provide a plurality of electrical connectors 24, 26 and a bus bar 28, and the plurality of electrical connectors 24, 26 and the bus bar 28 provide the main electrical connection function of the circuit board 20. The circuit board 20 can be any suitable type of circuit board, for example, a flexible printed circuit board (FPC) commonly used in the prior art can be used.

[0056] In an embodiment of the present invention, directional expressions such as "X direction", "Y direction", and "Z direction" are related to the battery pack in an installed state and the vehicle on which it is installed. For example, the "X direction" may generally correspond to the longitudinal direction (or lateral direction) of the vehicle on which the battery pack is installed, the "Y direction" may generally correspond to the lateral direction (or longitudinal direction) of the vehicle on which the battery pack is installed, and the "Z direction" may generally correspond to the height direction of the vehicle on which the battery pack is installed.

[0057] In some embodiments, the electrical connector 24 is a connecting sleeve, and the head end electrode 12a (or 12'a) and the tail end electrode 12'b (or 12b) are respectively inserted into the connecting sleeve from both ends, so that electrical connection can be quickly and firmly achieved. In other embodiments, the electrode can also be set in the form of a sleeve, and the electrical connector 24 is inserted into the sleeve. Alternatively, the electrical connector 24 and the electrode can also be fixedly connected by means such as clamping, bonding, welding, etc., and the electrical connector 24 can also be in the form of a sheet, a line, etc.

[0058] refer to Figure 2In some embodiments, the distance A1 between the head electrode 12a and the tail electrode 12b of the battery cell 12 is half of the dimension A of the battery cell 12 along the X direction, and the distance A2 between the multiple battery cells 12 (or 14, 12 is used as an example here) and the multiple battery cells 12' (or 14', 12' is used as an example here) is half of the dimension A of the battery cell 12 along the X direction. Through such an arrangement, it is possible to ensure that the multiple battery cells of the same battery block are closely arranged (for example, two adjacent battery cells are close to each other and there is almost no gap) on the basis of ensuring that the multiple battery cells 12 and the multiple battery cells 12' are alternately connected in series, so that each battery block can be arranged with enough battery cells to the greatest extent to ensure compactness and utilization.

[0059] In an embodiment of the present invention, the distances between the negative electrode and the positive electrode and the same end of the battery cell are respectively 1 / 4 and 3 / 4 of the dimension A of the battery cell along the X direction, so that the negative electrode and the positive electrode are symmetrically arranged relative to the center line of the battery cell along the Y direction, and a battery cell with an opposite electrode arrangement order can be obtained by rotating the battery cell 180 degrees around the center line, and the battery cells before and after the rotation can be used as the first layer and the second layer of battery cells in the double-layer structure, respectively, so there is no need to set two battery cells of different specifications for the double-layer structure.

[0060] In an embodiment of the present invention, a battery cell having the same electrode arrangement order as the battery cell can be obtained by rotating the battery cell 180 degrees around the center line along the X direction, and the battery cells before and after the rotation can be used as battery cells of two battery blocks facing each other. In some embodiments, the negative electrode and the positive electrode are arranged at the middle position of the battery cell in the Z direction, so that the negative electrode and the positive electrode before and after the rotation can face each other at the same height.

[0061] In some embodiments, the battery unit 12 (which may also be 12', 14 or 14', 12 is used as an example for illustration) is placed flat. Figure 1 and Fig. 9 "Lying flat" may mean that when the battery pack 100 is installed (installed on the vehicle), the thickness direction T of the battery cell 12 is the same as the Z direction (the height direction of the vehicle). The battery cell is usually flat, and its thickness is smaller than its length and width. By lying flat, the size of the battery pack 100 along the Z direction can be reduced, and a thin battery pack design can be achieved, which is conducive to saving space in the height direction of the vehicle. The length direction L, width direction W and thickness direction T of the battery cell 12 can be parallel to the X direction, Y direction and Z direction, respectively.

[0062] Reference again Figure 1The battery block 10 includes a U-shaped housing 16 for accommodating a plurality of battery cells 12 and 14, and the battery block 10' includes a U-shaped housing 16' for accommodating a plurality of battery cells 12' and 14'. The openings of the U-shaped housing 16 and the U-shaped housing 16' are opposite to each other. The U-shaped housing 16 and the U-shaped housing 16' realize the modular design of the battery blocks 10 and 10' (combining a plurality of battery cells together) and protect the plurality of battery cells. Figure 1 , Figures 5 to 7 As shown, the U-shaped shells 16, 16' have a hollow structure (a plurality of cavities are formed inside the shell wall), which is conducive to achieving a lightweight design.

[0063] Combination Figures 1 to 3 , Figure 7 The ends of the U-shaped shell 16 and the U-shaped shell 16' are flush. Since the battery blocks 10 and the battery blocks 10' are staggered, a vacant portion 162 is formed at one end of the U-shaped shell 16. The battery pack 100 further includes a battery control module 30 disposed in the vacant portion 162 and electrically connected to the circuit board 20. By disposing the battery control module 30 in the vacant portion 162, the space in the U-shaped shell 16 can be fully utilized to achieve a compact design of the battery pack 100. The battery control module 30 can be a slave battery control module (e.g., a slave BECM, i.e., a slave battery energy control module), whose input end 32 is electrically connected to the circuit board 20, and whose output end 34 is connected to a master battery control module (e.g., a master BECM, i.e., a master battery energy control module).

[0064] Combination Figure 3 and Fig.10 , the battery block 10 also includes a plurality of heat-conducting channels 18 arranged along the X direction, each heat-conducting channel 18 extends along the Z direction and communicates with the vents 122, 142 of the two stacked battery cells 12, 14, that is, the two battery cells share one heat-conducting channel. Similarly, the battery block 10' also includes a plurality of heat-conducting channels 18' arranged along the X direction, each heat-conducting channel 18' extends along the Y direction and communicates with the vents of the two stacked battery cells 12', 14'. When the battery pack 100 is installed in the vehicle, the heat-conducting channel can guide the gas and / or heat generated by the battery cells downward to the bottom of the battery pack to minimize the impact on the passengers. The cross-section of the heat-conducting channel can be arc-shaped. The heat-conducting channel is arranged between the circuit board and the battery block.

[0065] refer to Fig.11The present invention also proposes a battery pack 200, comprising: a battery pack housing; and one or more battery packs 100 as described in the above embodiments arranged in the battery pack housing, and the multiple battery packs 100 can be arranged along the Y direction. In some embodiments, the battery pack 200 also includes a main battery control module 210 electrically connected to the slave battery control modules of the multiple battery packs 100. In some embodiments, the battery pack 200 also includes a BEC circuit (battery elimination circuit) 220 electrically connected to the multiple battery packs 100. As described above, on the basis of configuring each battery pack to include two battery blocks opposite to each other and each battery block including two layers of battery cells, more battery cells can be combined into one battery pack, which can reduce the number of battery packs, thereby reducing the number of related electrical connection components for connecting the battery pack to the main battery control module 210 or the BEC circuit 220.

[0066] The present invention further provides a vehicle, which includes the battery pack 200 as described in the above embodiment.

[0067] In summary, through the technical solution of the present invention, two battery blocks can share one circuit board, thereby saving costs and improving design efficiency. The busbar can be partially replaced by an electrical connector that runs through the circuit board substrate, and the two current paths formed by the double-layer battery cells are connected with a shorter busbar at only one end, thereby achieving a design with fewer busbars and saving materials. By designing the battery cells to lie flat, the total height of the battery pack is mainly affected by the thickness of the battery cells, which can save space in the height direction of the vehicle. The battery block length is flexible, and the battery block length suitable for vehicles of different sizes can be adjusted by adding or removing battery cells. The battery cell exhaust is guided to the bottom of the battery pack through the heat conduction channel.

[0068] It should be understood that, under the premise of being technically feasible, the technical features listed above for different embodiments may be combined with each other to form other embodiments within the scope of the present invention.

[0069] In this application, the use of disjunctive conjunctions is intended to include conjunctions. The use of definite or indefinite articles is not intended to indicate cardinality. In particular, reference to "the" object or "a" and "an" objects is intended to represent a possible one of a plurality of such objects. In addition, the conjunction "or" may be used to convey simultaneous features, rather than mutually exclusive solutions. In other words, the conjunction "or" should be understood to include "and / or". The term "include" is inclusive and has the same scope as "comprise".

[0070] The above embodiments are possible examples of implementation methods of the present invention, and are only given to enable those skilled in the art to clearly understand the principles of the present invention. Those skilled in the art should understand that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope disclosed in the embodiments of the present invention (including claims) is limited to these examples. Under the overall concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined with each other, and many other changes in different aspects of the embodiments of the present invention as described above can be produced. For the sake of simplicity, they are not provided in the specific implementation method. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A battery pack, characterized in that: include: Two battery blocks facing each other, each of the battery blocks comprising a plurality of battery cells arranged along a first direction; as well as a circuit board disposed between the two battery blocks, the circuit board comprising a substrate and a plurality of electrical connectors penetrating the substrate and arranged along the first direction, the plurality of electrical connectors alternately connecting the plurality of battery cells of the two battery blocks in series; Among them, the multiple battery cells of the two battery blocks are staggered and opposite to each other, and the tail end electrodes of the battery cells of one battery block are opposite to the head end electrodes of the battery cells of the other battery block and are connected through the electrical connector.

2. The battery pack according to claim 1, characterized in that: The electrical connector is a connecting sleeve, and the head end electrode and the tail end electrode are respectively inserted into the connecting sleeve from both ends.

3. The battery pack according to claim 1, characterized in that: The distance between the head end electrode and the tail end electrode of each battery cell and the distance between the battery cells of the two battery blocks are both half of the size of the battery cell along the first direction.

4. The battery pack according to claim 1, characterized in that: The battery unit is placed flat.

5. The battery pack according to claim 1, characterized in that: Each of the battery blocks includes two layers of battery cells stacked along the second direction, and each layer of battery cells includes a plurality of the battery cells; the circuit board has two rows of electrical connectors arranged along the second direction, and each row of electrical connectors includes a plurality of the electrical connectors; the first layer of battery cells of the two battery blocks are alternately connected in series through the first row of electrical connectors to form a first current path; the second layer of battery cells of the two battery blocks are alternately connected in series through the second row of electrical connectors to form a second current path; the circuit board is also provided with a bus bar connecting the first current path and the second current path in series.

6. The battery pack according to claim 5, characterized in that: The battery pack has a first end and a second end in the first direction, the first current path flows from the first end to the second end, the second current path flows from the second end to the first end, and the bus bar connects the first current path and the second current path at the second end.

7. The battery pack according to claim 6, characterized in that: The length of the bus bar is the distance between two rows of electrical connectors in the second direction.

8. The battery pack according to claim 1, characterized in that: Each of the battery blocks includes a U-shaped housing for accommodating a plurality of the battery cells, and openings of the U-shaped housings of the two battery blocks face each other.

9. The battery pack according to claim 8, characterized in that: The U-shaped housing has a hollow structure.

10. The battery pack according to claim 8, characterized in that: The ends of the U-shaped shells of the two battery blocks are flush, a vacant portion is formed at one end of the U-shaped shell, and the battery pack further includes a battery control module disposed in the vacant portion and electrically connected to the circuit board.

11. The battery pack according to claim 5, characterized in that: Each of the battery blocks further includes a plurality of heat conduction channels arranged along the first direction, and each of the heat conduction channels extends along the second direction and communicates with ventilation portions of two stacked battery cells.

12. A battery pack, characterized in that: include: Two battery blocks facing each other, each of the battery blocks comprising two layers of battery cells stacked along a first direction, each layer comprising a plurality of battery cells arranged along a second direction; as well as A circuit board disposed between the two battery blocks, the circuit board comprising: a substrate; two rows of electrical connectors penetrating the substrate and arranged along the first direction, each row comprising a plurality of electrical connectors arranged along the second direction; and a bus bar connecting the same end of the two rows of electrical connectors; The first row of electrical connectors alternately connects the first layer of battery cells of the two battery blocks in series, and the second row of electrical connectors alternately connects the second layer of battery cells of the two battery blocks in series; the electrode arrangement order of the same layer of battery cells in the two battery blocks is the same, and the electrode arrangement order of the two layers of battery cells in the same battery block is opposite.

13. The battery pack according to claim 12, characterized in that: The multiple battery cells in the same layer of the two battery blocks are staggered and opposite to each other, and the tail end electrodes of the battery cells of one battery block are opposite to the head end electrodes of the battery cells of the other battery block and are connected through the electrical connector.

14. The battery pack according to claim 13, characterized in that: The electrical connector is a connecting sleeve, and the head end electrode and the tail end electrode are respectively inserted into the connecting sleeve from both ends.

15. The battery pack according to claim 13, characterized in that: The distance between the head end electrode and the tail end electrode of each battery cell and the staggered distance between the multiple battery cells of the two battery blocks are both half of the size of the battery cell along the second direction.

16. The battery pack according to claim 12, characterized in that: The battery unit is placed flat.

17. The battery pack according to claim 12, characterized in that: Each of the battery blocks includes a U-shaped shell for accommodating a plurality of the battery cells, and the openings of the U-shaped shells of the two battery blocks are opposite to each other; the ends of the U-shaped shells of the two battery blocks are flush, and a void portion is formed at one end of the U-shaped shell, and the battery pack also includes a battery control module arranged in the void portion and electrically connected to the circuit board.

18. The battery pack according to claim 12, characterized in that: Each of the battery blocks further includes a plurality of heat conduction channels arranged along the second direction, each of the heat conduction channels extending along the first direction and communicating with ventilation portions of two stacked battery cells.

19. A battery pack, characterized in that: include: A battery pack housing; and one or more battery packs as described in any one of claims 1 to 18 disposed in the battery pack housing.

20. A vehicle, characterized in that: include: A battery pack as claimed in claim 19.

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