A battery pack system of trayless design

Abstract

The utility model belongs to battery technical field provides a kind of battery package system of trayless design, including box cover, box and battery module;Several layers of liquid cooling plate are provided in the box, and the battery module is installed on each layer of liquid cooling plate;The box cover is connected with box, for protecting the battery module;The battery module includes several series and / or parallel electric core.The battery module of the utility model adopts trayless design, greatly utilizes the space of box, greatly improves battery system integration and saves system cost;The utility model is integrated cover plate or integrated component by redesigning battery module, in addition to guaranteeing data acquisition and structural strength effectiveness, battery system integration is high, and it provides guidance for battery system CTP, CTB, CTC design, which has important significance for battery system extremely simplified design.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and specifically relates to a battery pack system with a trayless design. Background Technology

[0002] Currently, the new energy power battery industry is experiencing explosive growth. The industry's development exhibits two core trends: first, continuously improving the energy density of lithium batteries through material system innovation and process optimization; second, achieving lightweighting and high integration of battery packs through system integration technology innovation.

[0003] To enhance competitiveness, companies urgently need to reduce manufacturing costs through structural design optimization while simultaneously meeting end-users' stringent requirements for high energy density in battery packs. Against this backdrop, battery pack integration technology has become a key area for industry breakthroughs. For example... Figure 1 As shown, current mainstream battery pack structures generally adopt a module integration cover design with a tray, that is, the existing battery pack or battery module integration cover includes tray a, FPC (data acquisition unit, Figure 1 The components are labeled b), the battery connection plates c, and the module cover d. However, this structure also reduces the space utilization and energy density of the battery pack, so it urgently needs improvement. Utility Model Content

[0004] To address the problems in the background art, this utility model proposes a trayless battery pack system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A trayless battery pack system includes a cover, a housing, and battery modules; The housing is provided with several layers of liquid cooling plates, and the battery module is installed on each layer of liquid cooling plates. The lid is connected to the body of the box and is used to protect the battery module; The battery module surface is integrated with a trayless integrated cover or a trayless integrated component.

[0006] Preferably, the lid has a U-shaped structure.

[0007] Preferably, the enclosure includes end plates, side plates, reinforcing beams, transition beams, and a bottom plate; The end plates are installed at both ends of the base plate, and the side plates are installed on both sides; The end plates at both ends are connected by side plates; The adapter beam is installed on the surface of the base plate and connected to the side plates at both ends; and the reinforcing beam is connected between the adapter beam and the end plate at one end, forming a cavity for installing the battery module between the adapter beam and the end plate at the other end. In the cavity where the battery module is installed, the inner surface of the end plate is provided with a stepped surface that is flush with the transition beam.

[0008] Preferably, the liquid cooling plate includes a first liquid cooling plate and a second liquid cooling plate; The second liquid cooling plate is integrated into the bottom plate of the housing; The first liquid cooling plate overlaps the surface of the step and the transition beam; or the first liquid cooling plate overlaps the top of the side plate.

[0009] Preferably, both the first liquid cooling plate and the second liquid cooling plate have built-in cooling channels, and the cooling channels are connected to an inlet pipe and an outlet pipe; One end of the water inlet pipe extends to the end of the box and is connected to the water inlet nozzle installed at the end of the box; One end of the water outlet pipe extends to the end of the tank and is connected to the water outlet nozzle installed at the end of the tank. The inlet and outlet are located at the same end of the housing.

[0010] Preferably, a plurality of electrode plates are disposed on the surface of the battery module away from the corresponding liquid cooling plate; each electrode plate is electrically connected to the battery cell of the battery module, so that the battery cells of the battery module form a battery string; The electrode is connected to the integrated cover plate or the integrated component; The integrated cover or integrated component has a battery cover mounted on its surface away from the battery module.

[0011] Preferably, the integrated cover plate includes: Several flexible circuit boards are laid on the surface of the battery module; Each of the flexible circuit boards has several electrode plates connected to both sides; A plurality of nickel sheets, each corresponding to an electrode; and one end of each nickel sheet is attached to the surface of a flexible circuit board, and the other end is attached to the surface of an electrode. A connector is provided between adjacent flexible circuit boards, and the connector is used to connect the electrode plates at the ends of adjacent flexible circuit boards.

[0012] Preferably, the flexible circuit board has a first connector electrically connected to its end.

[0013] Preferably, it also includes a data acquisition unit; The data acquisition unit includes a temperature-sensing bracket and an acquisition circuit integrated in a flexible circuit board. The acquisition circuit extends from the first connector to the nickel plate for electrical connection with each of the electrodes; The temperature sensing bracket is mounted on the surface of the battery module and is electrically connected to the data acquisition circuit.

[0014] Preferably, the integrated component includes a second connector and several data acquisition harnesses; One end of each acquisition line harness is connected to the second connector, and the other end is connected to a corresponding electrode.

[0015] The beneficial effects of this utility model are: 1. The integrated cover plate (or integrated component) of the battery of this utility model adopts a trayless design, which saves the space of the box, greatly improves the integration of the battery system and saves system costs. 2. Compared with the traditional module integrated cover, the integrated cover of this utility model simplifies the battery module tray design and makes the battery system more simplified. 3. By redesigning the integrated cover or integrated components of the battery module, this utility model ensures the effectiveness of data acquisition and structural strength while achieving a high degree of battery system integration. It provides guidance for the design of CTP, CTB, and CTC of the battery system, which is of great significance for the extreme simplification of battery system design.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 An exploded view of an existing battery pack system with a tray design is shown; Figure 2 A schematic diagram of a trayless battery pack system according to this utility model is shown. Figure 3 A schematic diagram of the structure of the housing of this utility model is shown; Figure 4 A schematic diagram of the double-layer liquid cooling plate structure of this utility model is shown; Figure 5 A schematic diagram of the battery module of this utility model is shown; Figure 6 It shows Figure 4 A magnified view of area A in the middle; Figure 7 A schematic diagram of the integrated component of this utility model is shown.

[0019] In the diagram: 1. Box cover; 2. Box body; 201. End plate; 202. Side plate; 203. Reinforcing beam; 204. Adapter beam; 205. Stepped surface; 206. Bottom plate; 3. Battery module; 301. Electrode; 4. First liquid cooling plate; 5. Battery cover plate; 6. Integrated cover plate; 601. Flexible circuit board; 602. First connector; 603. Nickel sheet; 604. Connector; 7. Water inlet pipe; 701. Water inlet nozzle; 8. Water outlet pipe; 801. Water outlet nozzle; 9. Second liquid cooling plate; 10. Integrated component; 1001. Second connector; 1002. Data acquisition harness. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figure 2 As shown, a trayless battery pack system includes a cover 1, a housing 2, and battery modules 3. The housing 2 contains several layers of liquid cooling plates, each on which a battery module 3 is mounted. The cover 1 is sealed to the housing 2 to protect the battery modules 3. Each battery module 3 includes several cells connected in series and / or parallel. The surface of the battery module 3 integrates a trayless integrated cover plate 6 or a trayless integrated component 10, maximizing the use of space in the housing 2. This results in high system integration, simplifies or even eliminates components in traditional designs, significantly improves battery system integration, and reduces system costs.

[0022] Furthermore, to meet different assembly needs and space utilization, the cover 1 adopts a U-shaped structure design, which can provide more convenient installation and maintenance space for internal components while ensuring sealing.

[0023] like Figure 3 As shown, the box body 2, as the core load-bearing component, is composed of end plates 201, side plates 202, reinforcing beams 203, transition beams 204, and a bottom plate 206. These components work together to form a stable frame system. The bottom plate 206 serves as the foundation support, with end plates 201 installed at both ends and side plates 202 tightly installed on both sides, forming the basic outline of the box body 2. Furthermore, the end plates 201 at both ends are connected via the side plates 202, effectively improving the overall deformation resistance and structural strength of the box body 2.

[0024] In addition, the transition beam 204 is horizontally installed on the surface of the base plate 206, and its two ends are stably connected to the side plates 202, playing a connecting role. Furthermore, a reinforcing beam 203 is added between the transition beam 204 and the end plate 201 at one end to further enhance the structural rigidity; while a cavity for installing the battery module 3 can be reserved between the transition beam 204 and the end plate 201 at the other end.

[0025] In addition, in the mounting cavity of the battery module 3, the inner surface of the end plate 201 can be provided with a stepped surface 205 that is flush with the transition beam 204.

[0026] like Figure 4 As shown, the liquid cooling plate includes a first liquid cooling plate 4 and a second liquid cooling plate 9. The second liquid cooling plate 9 is mounted on the bottom plate 206 of the housing 2, and the first liquid cooling plate 4 overlaps the surface of the step surface 205 and the transition beam 204. Furthermore, both the first liquid cooling plate 4 and the second liquid cooling plate 9 have built-in cooling channels, which connect to an inlet pipe 7 and an outlet pipe 8. One end of the inlet pipe 7 extends to the end of the housing 2 and is connected to a water inlet nozzle 701 installed at the end of the housing 2; one end of the outlet pipe 8 extends to the end of the housing 2 and is connected to a water outlet nozzle 801 installed at the end of the housing 2. The inlet nozzle 701 and the outlet nozzle 801 are located at the same end of the housing 2.

[0027] Another optional installation method for the first liquid cooling plate 4 is to install it on the top of the side plate 202. In this case, the first liquid cooling plate 4 is connected to the mounting holes on the top of the side plate 202 by screws, etc., while the cover 1 is connected to the mounting holes on the side of the side plate 202 by screws.

[0028] It should be noted that the liquid cooling plate serves as the cooling structure of the battery pack system. The cooling medium inside the liquid cooling plate can enter the first liquid cooling plate 4 and the second liquid cooling plate 9 through the water inlet 701. The heat generated by the battery cell 3 after it is working can be absorbed by the cooling medium in the liquid cooling plate, and then the cooling medium can flow out through the water outlet 801.

[0029] like Figure 5 As shown, in battery module 3, several electrode sheets 301 are arranged in an orderly manner on the surface away from the corresponding liquid cooling plate. These electrode sheets 301 are reliably electrically connected to the cells of battery module 3 through a conductive connection process, thereby connecting the cells in series to form a complete battery string, providing a stable conductive path for directional energy transmission.

[0030] Furthermore, an integrated cover plate 6 is connected to the top of the electrode 301. This integrated cover plate 6 not only serves as the electrical connection carrier for the electrode 301 but also provides a protective cover for the internal conductive structure through its integrated design. A battery cover plate 5 is installed on the surface of the integrated cover plate 6 away from the battery module 3. This layered structural design achieves modular integration of electrical connections and enhances the physical protection performance of the battery module 3 through the double cover plate structure. The integrated cover plate 6 effectively prevents poor contact of the electrode 301 due to external impacts or environmental factors, while the battery cover plate 5 provides an outer layer of mechanical protection for the entire module and provides a standardized interface plane for external wiring harness connections, ensuring the safety and ease of assembly of the battery system.

[0031] Furthermore, the integrated cover plate 6 has a built-in data acquisition unit, which includes a temperature sensing bracket and an acquisition circuit integrated in the flexible circuit board 601; the acquisition circuit extends from the first plug interface 602 to the nickel sheet 603 for electrical connection with each electrode 301; the temperature sensing bracket is mounted on the surface of the battery module 3 and is electrically connected to the acquisition circuit.

[0032] like Figure 6 As shown, the integrated cover plate 6 includes a flexible circuit board 601, a first insertion interface 602, nickel sheets 603, and connectors 604. Several flexible circuit boards 601 are laid on the surface of the battery module 3, providing a carrier for circuit connections and data transmission. Several electrode sheets 301 are connected to both sides of each flexible circuit board 601. The number of nickel sheets 603 is the same as the number of electrode sheets 301, and they are arranged in a one-to-one correspondence. One end of the nickel sheet 603 overlaps the surface of the flexible circuit board 601, and the other end overlaps the surface of the electrode sheet 301. This overlap at both ends forms a stable conductive path, ensuring the transmission of electrical signals.

[0033] Furthermore, adjacent flexible circuit boards 601 are connected by connectors 604, which connect the electrode plates 301 at the ends of adjacent flexible circuit boards 601, realizing electrical connection between different flexible circuit boards 601 and forming a complete circuit system. Moreover, the ends of the flexible circuit boards 601 are electrically connected to a first plug-in interface 602 for data interaction and power transmission between the circuit system and external devices, facilitating system expansion and debugging.

[0034] Furthermore, the integrated cover plate 6 incorporates a data acquisition unit, which consists of a temperature-sensing bracket and an acquisition circuit integrated into the flexible circuit board 601. The acquisition circuit extends from the first connector 602 to the nickel plate 603 and is electrically connected to each electrode 301, enabling real-time acquisition of the electrical parameters of the electrode 301. The temperature-sensing bracket is mounted on the surface of the battery module 3 and electrically connected to the acquisition circuit, used to monitor the surface temperature of the battery module in real time, providing data for the safe and stable operation of the system.

[0035] It should be noted that the temperature sensing bracket has holes at both ends and is fixed to the electrode 301 of the battery cell. The temperature sensing bracket has a window corresponding to the position of the battery cell's explosion-proof valve, and a fixing groove is provided to fix the temperature sensing position.

[0036] like Figure 7 As shown, Figure 5 and Figure 6 The integrated cover plate 6 can also be replaced by an integrated component 10, which includes a second connector 1001 and several acquisition harnesses 1002. One end of each acquisition harness 1002 is connected to the second connector 1001, and the other end is connected to a corresponding electrode 301.

[0037] It should be noted that after using the integrated cover plate 6 or integrated component 10, the battery pack system can collect various usage data in real time, such as temperature data. By monitoring these data, the working status of each cell in the battery module 3 can be determined, thereby determining the cell wear, which is of great significance for the maintenance of the battery pack.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A trayless battery pack system, characterized in that, Includes a lid (1), a body (2), and a battery module (3); The housing (2) is provided with several layers of liquid cooling plates, and the battery module (3) is installed on each layer of liquid cooling plates; The cover (1) is connected to the box body (2) and is used to protect the battery module (3); The battery module (3) has an integrated cover plate (6) or an integrated component (10) with a trayless design integrated on its surface.

2. The trayless battery pack system according to claim 1, characterized in that, The box cover (1) has a U-shaped structure.

3. The trayless battery pack system according to claim 1, characterized in that, The box body (2) includes an end plate (201), a side plate (202), a reinforcing beam (203), a transition beam (204), and a bottom plate (206); The bottom plate (206) has end plates (201) installed at both ends and side plates (202) installed on both sides; The end plates (201) at both ends are connected by side plates (202); The adapter beam (204) is installed on the surface of the base plate (206) and connected to the side plate (202) at both ends; and the adapter beam (204) is connected to the end plate (201) at one end by the reinforcing beam (203), and forms a cavity for installing the battery module (3) between the adapter beam (204) and the end plate (201) at the other end; In the cavity where the battery module (3) is installed, the inner surface of the end plate (201) is provided with a stepped surface (205) that is flush with the transition beam (204).

4. A trayless battery pack system according to claim 3, characterized in that, The liquid cooling plate includes a first liquid cooling plate (4) and a second liquid cooling plate (9); The second liquid cooling plate (9) is integrated on the bottom plate (206) of the housing (2); The first liquid cooling plate (4) overlaps the surface of the step surface (205) and the transition beam (204); or the first liquid cooling plate (4) overlaps the top of the side plate (202).

5. A trayless battery pack system according to claim 4, characterized in that, The first liquid cooling plate (4) and the second liquid cooling plate (9) are both equipped with cooling channels, which are connected to an inlet pipe (7) and an outlet pipe (8). One end of the water inlet pipe (7) extends to the end of the box (2) and is connected to the water inlet (701) installed at the end of the box (2); One end of the water outlet pipe (8) extends to the end of the box body (2) and is connected to the water outlet (801) installed at the end of the box body (2); The inlet (701) and outlet (801) are located at the same end of the housing (2).

6. A trayless battery pack system according to any one of claims 1-5, characterized in that, The surface of the battery module (3) away from the corresponding liquid cooling plate is provided with a plurality of electrode plates (301); each electrode plate (301) is electrically connected to the battery cell of the battery module (3) so that the battery cells of the battery module (3) form a battery string. The electrode (301) is connected to the integrated cover plate (6) or the integrated component (10); The integrated cover plate (6) or integrated component (10) has a battery cover plate (5) mounted on the surface away from the battery module (3).

7. A trayless battery pack system according to claim 6, characterized in that, The integrated cover plate (6) includes: Several flexible circuit boards (601) are laid on the surface of the battery module (3); Each of the flexible circuit boards (601) has a plurality of electrode plates (301) connected to both sides; A plurality of nickel sheets (603) are provided, each corresponding to an electrode (301); one end of each nickel sheet (603) is attached to the surface of the flexible circuit board (601), and the other end is attached to the surface of the electrode (301). A connector (604) is provided between adjacent flexible circuit boards (601), and the connector (604) is used to connect the electrode plates (301) at the ends of adjacent flexible circuit boards (601).

8. A trayless battery pack system according to claim 7, characterized in that, The flexible circuit board (601) is electrically connected to a first connector (602) at one end.

9. A trayless battery pack system according to claim 8, characterized in that, It also includes a data acquisition unit; The data acquisition unit includes a temperature sensing bracket and an acquisition circuit integrated in a flexible circuit board (601); The acquisition circuit extends from the first connector (602) to the nickel plate (603) for electrical connection with each of the electrodes (301); The temperature sensing bracket is mounted on the surface of the battery module (3) and is electrically connected to the acquisition circuit.

10. A trayless battery pack system according to claim 6, characterized in that, The integrated component (10) includes a second connector (1001) and several acquisition harnesses (1002); Each acquisition line harness (1002) is connected at one end to the second connector (1001) and at the other end to a corresponding electrode (301).

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